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#!/bin/bash
apt update
apt-get install python3 python3-dev python3-setuptools python3-cffi dkms python3-distutils gdebi -y
apt remove zfs libuutil1 libnvpair1 -y
apt remove "zfs*" -y
apt remove "zpool*" -y
apt remove "*zfs*" -y
apt remove "*zpool*" -y
apt autoremove -y
for file in *$1*.deb; do sudo gdebi -q --non-interactive $file; done
cp zfSnap /usr/sbin/zfSnap
chmod 755 /usr/sbin/zfSnap
echo "$(grep -ve "^zfs$" /etc/modules-load.d/modules.conf)" > /etc/modules-load.d/modules.conf
echo zfs >> /etc/modules-load.d/modules.conf

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#!/bin/sh
# "THE BEER-WARE LICENSE":
# <graudeejs@yandex.com> wrote this file. As long as you retain this notice you
# can do whatever you want with this stuff. If we meet some day, and you think
# this stuff is worth it, you can buy me a beer in return. Aldis Berjoza
# wiki: https://github.com/graudeejs/zfSnap/wiki
# repository: https://github.com/graudeejs/zfSnap
# Bug tracking: https://github.com/graudeejs/zfSnap/issues
readonly VERSION=1.11.1
ESED='sed -E'
zfs_cmd='/sbin/zfs'
zpool_cmd='/sbin/zpool'
note() {
echo "NOTE: $*" > /dev/stderr
}
err() {
echo "ERROR: $*" > /dev/stderr
}
fatal() {
echo "FATAL: $*" > /dev/stderr
exit 1
}
warn() {
echo "WARNING: $*" > /dev/stderr
}
OS=`uname`
case $OS in
'FreeBSD')
;;
'SunOS')
ESED='sed -r'
if [ -d "/usr/gnu/bin" ]; then
export PATH="/usr/gnu/bin:$PATH"
else
fatal "GNU bin direcotry not found"
fi
;;
'Linux'|'GNU/kFreeBSD')
ESED='sed -r'
;;
'Darwin')
zfs_cmd='/usr/sbin/zfs'
zpool_cmd='/usr/sbin/zpool'
;;
*)
fatal "Your OS isn't supported"
;;
esac
is_true() {
case "$1" in
[Tt][Rr][Uu][Ee])
return 0
;;
[Ff][Aa][Ll][Ss][Ee])
return 1
;;
*)
fatal "must be yes or no"
;;
esac
}
is_false() {
is_true $1 && return 1 || return 0
}
s2time() {
# convert seconds to human readable time
xtime=$1
years=$(($xtime / 31536000))
xtime=$(($xtime % 31536000))
[ ${years:-0} -gt 0 ] && years="${years}y" || years=""
months=$(($xtime / 2592000))
xtime=$(($xtime % 2592000))
[ ${months:-0} -gt 0 ] && months="${months}m" || months=""
days=$(($xtime / 86400))
xtime=$(($xtime % 86400))
[ ${days:-0} -gt 0 ] && days="${days}d" || days=""
hours=$(($xtime / 3600))
xtime=$(($xtime % 3600))
[ ${hours:-0} -gt 0 ] && hours="${hours}h" || hours=""
minutes=$(($xtime / 60))
[ ${minutes:-0} -gt 0 ] && minutes="${minutes}M" || minutes=""
seconds=$(($xtime % 60))
[ ${seconds:-0} -gt 0 ] && seconds="${seconds}s" || seconds=""
echo "${years}${months}${days}${hours}${minutes}${seconds}"
}
time2s() {
# convert human readable time to seconds
echo "$1" | sed -e 's/y/*31536000+/g; s/m/*2592000+/g; s/w/*604800+/g; s/d/*86400+/g; s/h/*3600+/g; s/M/*60+/g; s/s//g; s/\+$//' | bc -l
}
date2timestamp() {
date_normal="`echo $1 | $ESED -e 's/\./:/g; s/(20[0-9][0-9]-[01][0-9]-[0-3][0-9])_([0-2][0-9]:[0-5][0-9]:[0-5][0-9])/\1 \2/'`"
case $OS in
'FreeBSD' | 'Darwin' )
date -j -f '%Y-%m-%d %H:%M:%S' "$date_normal" '+%s'
;;
*)
date --date "$date_normal" '+%s'
;;
esac
}
help() {
cat << EOF
${0##*/} v${VERSION} by Aldis Berjoza
Syntax:
${0##*/} [ generic options ] [ options ] zpool/filesystem ...
GENERIC OPTIONS:
-d = Delete old snapshots
-e = Return number of failed actions as exit code.
-F age = Force delete all snapshots exceeding age
-n = Only show actions that would be performed
-s = Don't do anything on pools running resilver
-S = Don't do anything on pools running scrub
-v = Verbose output
-z = Force new snapshots to have 00 seconds!
-zpool28fix = Workaround for zpool v28 zfs destroy -r bug
OPTIONS:
-a ttl = Set how long snapshot should be kept
-D pool/fs = Delete all zfSnap snapshots of specific pool/fs (ignore ttl)
-p prefix = Use prefix for snapshots after this switch
-P = Don't use prefix for snapshots after this switch
-r = Create recursive snapshots for all zfs file systems that
fallow this switch
-R = Create non-recursive snapshots for all zfs file systems that
fallow this switch
LINKS:
wiki: https://github.com/graudeejs/zfSnap/wiki
repository: https://github.com/graudeejs/zfSnap
Bug tracking: https://github.com/graudeejs/zfSnap/issues
EOF
exit 0
}
rm_zfs_snapshot() {
if is_true $zpool28fix && [ "$1" = '-r' ]; then
# get rid of '-r' parameter
rm_zfs_snapshot $2
return
fi
if [ "$1" = '-r' ]; then
skip_pool $2 || return 1
else
skip_pool $1 || return 1
fi
zfs_destroy="$zfs_cmd destroy $*"
# hardening: make really, really sure we are deleting snapshot
if echo $i | grep -q -e '@'; then
if is_false $dry_run; then
if $zfs_destroy > /dev/stderr; then
is_true $verbose && echo "$zfs_destroy ... DONE"
else
is_true $verbose && echo "$zfs_destroy ... FAIL"
is_true $count_failures && failures=$(($failures + 1))
fi
else
echo "$zfs_destroy"
fi
else
echo "FATAL: trying to delete zfs pool or filesystem? WTF?" > /dev/stderr
echo " This is bug, we definitely don't want that." > /dev/stderr
echo " Please report it to https://github.com/graudeejs/zfSnap/issues" > /dev/stderr
echo " Don't panic, nothing was deleted :)" > /dev/stderr
is_true $count_failures && [ $failures -gt 0 ] && exit $failures
exit 1
fi
}
skip_pool() {
# more like skip pool???
if is_true $scrub_skip; then
for i in $scrub_pools; do
if [ `echo $1 | sed -e 's#/.*$##; s/@.*//'` = $i ]; then
is_true $verbose && note "No action will be performed on '$1'. Scrub is running on pool."
return 1
fi
done
fi
if is_true $resilver_skip; then
for i in $resilver_pools; do
if [ `echo $1 | sed -e 's#/.*$##; s/@.*//'` = $i ]; then
is_true $verbose && note "No action will be performed on '$1'. Resilver is running on pool."
return 1
fi
done
fi
return 0
}
[ $# = 0 ] && help
[ "$1" = '-h' -o $1 = "--help" ] && help
ttl='1m' # default snapshot ttl
force_delete_snapshots_age=-1 # Delete snapshots older than x seconds. -1 means NO
delete_snapshots="false" # Delete old snapshots?
verbose="false" # Verbose output?
dry_run="false" # Dry run?
prefx="" # Default prefix
prefxes="" # List of prefixes
delete_specific_fs_snapshots="" # List of specific snapshots to delete
delete_specific_fs_snapshots_recursively="" # List of specific snapshots to delete recursively
zero_seconds="false" # Should new snapshots always have 00 seconds?
scrub_pools="" # List of pools that are in precess of scrubing
resilver_pools="" # List of pools that are in process of resilvering
pools="" # List of pools
get_pools="false" # Should I get list of pools?
resilver_skip="false" # Should I skip processing pools in process of resilvering.
scrub_skip="false" # Should I skip processing pools in process of scrubing.
failures=0 # Number of failed actions.
count_failures="false" # Should I coundt failed actions?
zpool28fix="false" # Workaround for zpool v28 zfs destroy -r bug
while [ "$1" = '-d' -o "$1" = '-v' -o "$1" = '-n' -o "$1" = '-F' -o "$1" = '-z' -o "$1" = '-s' -o "$1" = '-S' -o "$1" = '-e' -o "$1" = '-zpool28fix' ]; do
case "$1" in
'-d')
delete_snapshots="true"
shift
;;
'-v')
verbose="true"
shift
;;
'-n')
dry_run="true"
shift
;;
'-F')
force_delete_snapshots_age=`time2s $2`
shift 2
;;
'-z')
zero_seconds="true"
shift
;;
'-s')
get_pools="true"
resilver_skip="true"
shift
;;
'-S')
get_pools="true"
scrub_skip="true"
shift
;;
'-e')
count_failures="true"
shift
;;
'-zpool28fix')
zpool28fix="true"
shift
;;
esac
done
if is_true $get_pools; then
pools=`$zpool_cmd list -H -o name`
for i in $pools; do
if is_true $resilver_skip; then
$zpool_cmd status $i | grep -q -e 'resilver in progress' && resilver_pools="$resilver_pools $i"
fi
if is_true $scrub_skip; then
$zpool_cmd status $i | grep -q -e 'scrub in progress' && scrub_pools="$scrub_pools $i"
fi
done
fi
readonly date_pattern='20[0-9][0-9]-[01][0-9]-[0-3][0-9]_[0-2][0-9]\.[0-5][0-9]\.[0-5][0-9]'
if is_false $zero_seconds; then
readonly tfrmt='%Y-%m-%d_%H.%M.%S'
else
readonly tfrmt='%Y-%m-%d_%H.%M.00'
fi
readonly htime_pattern='([0-9]+y)?([0-9]+m)?([0-9]+w)?([0-9]+d)?([0-9]+h)?([0-9]+M)?([0-9]+[s]?)?'
is_true $dry_run && zfs_list=`$zfs_cmd list -H -o name`
ntime=`date "+$tfrmt"`
while [ "$1" ]; do
while [ "$1" = '-r' -o "$1" = '-R' -o "$1" = '-a' -o "$1" = '-p' -o "$1" = '-P' -o "$1" = '-D' ]; do
case "$1" in
'-r')
zopt='-r'
shift
;;
'-R')
zopt=''
shift
;;
'-a')
ttl="$2"
echo "$ttl" | grep -q -E -e "^[0-9]+$" && ttl=`s2time $ttl`
shift 2
;;
'-p')
prefx="$2"
prefxes="$prefxes|$prefx"
shift 2
;;
'-P')
prefx=""
shift
;;
'-D')
if [ "$zopt" != '-r' ]; then
delete_specific_fs_snapshots="$delete_specific_fs_snapshots $2"
else
delete_specific_fs_snapshots_recursively="$delete_specific_fs_snapshots_recursively $2"
fi
shift 2
;;
esac
done
# create snapshots
if [ $1 ]; then
if skip_pool $1; then
if [ $1 = `echo $1 | $ESED -e 's/^-//'` ]; then
zfs_snapshot="$zfs_cmd snapshot $zopt $1@${prefx}${ntime}--${ttl}${postfx}"
if is_false $dry_run; then
if $zfs_snapshot > /dev/stderr; then
is_true $verbose && echo "$zfs_snapshot ... DONE"
else
is_true $verbose && echo "$zfs_snapshot ... FAIL"
is_true $count_failures && failures=$(($failures + 1))
fi
else
printf "%s\n" $zfs_list | grep -m 1 -q -E -e "^$1$" \
&& echo "$zfs_snapshot" \
|| err "Looks like zfs filesystem '$1' doesn't exist"
fi
else
warn "'$1' doesn't look like valid argument. Ignoring"
fi
fi
shift
fi
done
prefxes=`echo "$prefxes" | sed -e 's/^\|//'`
# delete snapshots
if is_true $delete_snapshots || [ $force_delete_snapshots_age -ne -1 ]; then
if is_false $zpool28fix; then
zfs_snapshots=`$zfs_cmd list -H -o name -t snapshot | grep -E -e "^.*@(${prefxes})?${date_pattern}--${htime_pattern}$" | sed -e 's#/.*@#@#'`
else
zfs_snapshots=`$zfs_cmd list -H -o name -t snapshot | grep -E -e "^.*@(${prefxes})?${date_pattern}--${htime_pattern}$"`
fi
current_time=`date +%s`
for i in `echo $zfs_snapshots | xargs printf "%s\n" | $ESED -e "s/^.*@//" | sort -u`; do
create_time=$(date2timestamp `echo "$i" | $ESED -e "s/--${htime_pattern}$//; s/^(${prefxes})?//"`)
if is_true $delete_snapshots; then
stay_time=$(time2s `echo $i | $ESED -e "s/^(${prefxes})?${date_pattern}--//"`)
[ $current_time -gt $(($create_time + $stay_time)) ] \
&& rm_snapshot_pattern="$rm_snapshot_pattern $i"
fi
if [ "$force_delete_snapshots_age" -ne -1 ]; then
[ $current_time -gt $(($create_time + $force_delete_snapshots_age)) ] \
&& rm_snapshot_pattern="$rm_snapshot_pattern $i"
fi
done
if [ "$rm_snapshot_pattern" != '' ]; then
rm_snapshots=$(echo $zfs_snapshots | xargs printf '%s\n' | grep -E -e "@`echo $rm_snapshot_pattern | sed -e 's/ /|/g'`" | sort -u)
for i in $rm_snapshots; do
rm_zfs_snapshot -r $i
done
fi
fi
# delete all snap
if [ "$delete_specific_fs_snapshots" != '' ]; then
rm_snapshots=`$zfs_cmd list -H -o name -t snapshot | grep -E -e "^($(echo "$delete_specific_fs_snapshots" | tr ' ' '|'))@(${prefxes})?${date_pattern}--${htime_pattern}$"`
for i in $rm_snapshots; do
rm_zfs_snapshot $i
done
fi
if [ "$delete_specific_fs_snapshots_recursively" != '' ]; then
rm_snapshots=`$zfs_cmd list -H -o name -t snapshot | grep -E -e "^($(echo "$delete_specific_fs_snapshots_recursively" | tr ' ' '|'))@(${prefxes})?${date_pattern}--${htime_pattern}$"`
for i in $rm_snapshots; do
rm_zfs_snapshot -r $i
done
fi
is_true $count_failures && exit $failures
exit 0
# vim: set ts=4 sw=4 expandtab:

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root = true
[*]
end_of_line = lf
insert_final_newline = true
trim_trailing_whitespace = true
[*.{c,h}]
tab_width = 8
indent_style = tab

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# Contributing to OpenZFS
<p align="center">
<img alt="OpenZFS Logo"
src="https://openzfs.github.io/openzfs-docs/_static/img/logo/480px-Open-ZFS-Secondary-Logo-Colour-halfsize.png"/>
</p>
*First of all, thank you for taking the time to contribute!*
By using the following guidelines, you can help us make OpenZFS even better.
## Table Of Contents
[What should I know before I get
started?](#what-should-i-know-before-i-get-started)
* [Get ZFS](#get-zfs)
* [Debug ZFS](#debug-zfs)
* [Where can I ask for help?](#where-can-I-ask-for-help)
[How Can I Contribute?](#how-can-i-contribute)
* [Reporting Bugs](#reporting-bugs)
* [Suggesting Enhancements](#suggesting-enhancements)
* [Pull Requests](#pull-requests)
* [Testing](#testing)
[Style Guides](#style-guides)
* [Coding Conventions](#coding-conventions)
* [Commit Message Formats](#commit-message-formats)
* [New Changes](#new-changes)
* [OpenZFS Patch Ports](#openzfs-patch-ports)
* [Coverity Defect Fixes](#coverity-defect-fixes)
* [Signed Off By](#signed-off-by)
Helpful resources
* [OpenZFS Documentation](https://openzfs.github.io/openzfs-docs/)
* [OpenZFS Developer Resources](http://open-zfs.org/wiki/Developer_resources)
* [Git and GitHub for beginners](https://openzfs.github.io/openzfs-docs/Developer%20Resources/Git%20and%20GitHub%20for%20beginners.html)
## What should I know before I get started?
### Get ZFS
You can build zfs packages by following [these
instructions](https://openzfs.github.io/openzfs-docs/Developer%20Resources/Building%20ZFS.html),
or install stable packages from [your distribution's
repository](https://openzfs.github.io/openzfs-docs/Getting%20Started/index.html).
### Debug ZFS
A variety of methods and tools are available to aid ZFS developers.
It's strongly recommended that when developing a patch the `--enable-debug`
configure option should be set. This will enable additional correctness
checks and all the ASSERTs to help quickly catch potential issues.
In addition, there are numerous utilities and debugging files which
provide visibility into the inner workings of ZFS. The most useful
of these tools are discussed in detail on the [Troubleshooting
page](https://openzfs.github.io/openzfs-docs/Basic%20Concepts/Troubleshooting.html).
### Where can I ask for help?
The [zfs-discuss mailing
list](https://openzfs.github.io/openzfs-docs/Project%20and%20Community/Mailing%20Lists.html)
or IRC are the best places to ask for help. Please do not file
support requests on the GitHub issue tracker.
## How Can I Contribute?
### Reporting Bugs
*Please* contact us via the [zfs-discuss mailing
list](https://openzfs.github.io/openzfs-docs/Project%20and%20Community/Mailing%20Lists.html)
or IRC if you aren't certain that you are experiencing a bug.
If you run into an issue, please search our [issue
tracker](https://github.com/openzfs/zfs/issues) *first* to ensure the
issue hasn't been reported before. Open a new issue only if you haven't
found anything similar to your issue.
You can open a new issue and search existing issues using the public [issue
tracker](https://github.com/openzfs/zfs/issues).
#### When opening a new issue, please include the following information at the top of the issue:
* What distribution (with version) you are using.
* The spl and zfs versions you are using, installation method (repository
or manual compilation).
* Describe the issue you are experiencing.
* Describe how to reproduce the issue.
* Including any warning/errors/backtraces from the system logs.
When a new issue is opened, it is not uncommon for developers to request
additional information.
In general, the more detail you share about a problem the quicker a
developer can resolve it. For example, providing a simple test case is always
exceptionally helpful.
Be prepared to work with the developers investigating your issue. Your
assistance is crucial in providing a quick solution. They may ask for
information like:
* Your pool configuration as reported by `zdb` or `zpool status`.
* Your hardware configuration, such as
* Number of CPUs.
* Amount of memory.
* Whether your system has ECC memory.
* Whether it is running under a VMM/Hypervisor.
* Kernel version.
* Values of the spl/zfs module parameters.
* Stack traces which may be logged to `dmesg`.
### Suggesting Enhancements
OpenZFS is a widely deployed production filesystem which is under active
development. The team's primary focus is on fixing known issues, improving
performance, and adding compelling new features.
You can view the list of proposed features
by filtering the issue tracker by the ["Type: Feature"
label](https://github.com/openzfs/zfs/issues?q=is%3Aopen+is%3Aissue+label%3A%22Type%3A+Feature%22).
If you have an idea for a feature first check this list. If your idea already
appears then add a +1 to the top most comment, this helps us gauge interest
in that feature.
Otherwise, open a new issue and describe your proposed feature. Why is this
feature needed? What problem does it solve?
### Pull Requests
#### General
* All pull requests, except backports and releases, must be based on the current master branch
and should apply without conflicts.
* Please attempt to limit pull requests to a single commit which resolves
one specific issue.
* Make sure your commit messages are in the correct format. See the
[Commit Message Formats](#commit-message-formats) section for more information.
* When updating a pull request squash multiple commits by performing a
[rebase](https://git-scm.com/docs/git-rebase) (squash).
* For large pull requests consider structuring your changes as a stack of
logically independent patches which build on each other. This makes large
changes easier to review and approve which speeds up the merging process.
* Try to keep pull requests simple. Simple code with comments is much easier
to review and approve.
* All proposed changes must be approved by an OpenZFS organization member.
* If you have an idea you'd like to discuss or which requires additional testing, consider opening it as a draft pull request.
Once everything is in good shape and the details have been worked out you can remove its draft status.
Any required reviews can then be finalized and the pull request merged.
#### Tests and Benchmarks
* Every pull request will by tested by the buildbot on multiple platforms by running the [zfs-tests.sh and zloop.sh](
https://openzfs.github.io/openzfs-docs/Developer%20Resources/Building%20ZFS.html#running-zloop-sh-and-zfs-tests-sh) test suites.
* To verify your changes conform to the [style guidelines](
https://github.com/openzfs/zfs/blob/master/.github/CONTRIBUTING.md#style-guides
), please run `make checkstyle` and resolve any warnings.
* Static code analysis of each pull request is performed by the buildbot; run `make lint` to check your changes.
* Test cases should be provided when appropriate.
This includes making sure new features have adequate code coverage.
* If your pull request improves performance, please include some benchmarks.
* The pull request must pass all required [ZFS
Buildbot](http://build.zfsonlinux.org/) builders before
being accepted. If you are experiencing intermittent TEST
builder failures, you may be experiencing a [test suite
issue](https://github.com/openzfs/zfs/issues?q=is%3Aissue+is%3Aopen+label%3A%22Type%3A+Test+Suite%22).
There are also various [buildbot options](https://openzfs.github.io/openzfs-docs/Developer%20Resources/Buildbot%20Options.html)
to control how changes are tested.
### Testing
All help is appreciated! If you're in a position to run the latest code
consider helping us by reporting any functional problems, performance
regressions or other suspected issues. By running the latest code to a wide
range of realistic workloads, configurations and architectures we're better
able quickly identify and resolve potential issues.
Users can also run the [ZFS Test
Suite](https://github.com/openzfs/zfs/tree/master/tests) on their systems
to verify ZFS is behaving as intended.
## Style Guides
### Repository Structure
OpenZFS uses a standardised branching structure.
- The "development and main branch", is the branch all development should be based on.
- "Release branches" contain the latest released code for said version.
- "Staging branches" contain selected commits prior to being released.
**Branch Names:**
- Development and Main branch: `master`
- Release branches: `zfs-$VERSION-release`
- Staging branches: `zfs-$VERSION-staging`
`$VERSION` should be replaced with the `major.minor` version number.
_(This is the version number without the `.patch` version at the end)_
### Coding Conventions
We currently use [C Style and Coding Standards for
SunOS](http://www.cis.upenn.edu/%7Elee/06cse480/data/cstyle.ms.pdf) as our
coding convention.
This repository has an `.editorconfig` file. If your editor [supports
editorconfig](https://editorconfig.org/#download), it will
automatically respect most of this project's whitespace preferences.
Additionally, Git can help warn on whitespace problems as well:
```
git config --local core.whitespace trailing-space,space-before-tab,indent-with-non-tab,-tab-in-indent
```
### Commit Message Formats
#### New Changes
Commit messages for new changes must meet the following guidelines:
* In 72 characters or less, provide a summary of the change as the
first line in the commit message.
* A body which provides a description of the change. If necessary,
please summarize important information such as why the proposed
approach was chosen or a brief description of the bug you are resolving.
Each line of the body must be 72 characters or less.
* The last line must be a `Signed-off-by:` tag. See the
[Signed Off By](#signed-off-by) section for more information.
An example commit message for new changes is provided below.
```
This line is a brief summary of your change
Please provide at least a couple sentences describing the
change. If necessary, please summarize decisions such as
why the proposed approach was chosen or what bug you are
attempting to solve.
Signed-off-by: Contributor <contributor@email.com>
```
#### Coverity Defect Fixes
If you are submitting a fix to a
[Coverity defect](https://scan.coverity.com/projects/zfsonlinux-zfs),
the commit message should meet the following guidelines:
* Provides a subject line in the format of
`Fix coverity defects: CID dddd, dddd...` where `dddd` represents
each CID fixed by the commit.
* Provides a body which lists each Coverity defect and how it was corrected.
* The last line must be a `Signed-off-by:` tag. See the
[Signed Off By](#signed-off-by) section for more information.
An example Coverity defect fix commit message is provided below.
```
Fix coverity defects: CID 12345, 67890
CID 12345: Logically dead code (DEADCODE)
Removed the if(var != 0) block because the condition could never be
satisfied.
CID 67890: Resource Leak (RESOURCE_LEAK)
Ensure free is called after allocating memory in function().
Signed-off-by: Contributor <contributor@email.com>
```
#### Signed Off By
A line tagged as `Signed-off-by:` must contain the developer's
name followed by their email. This is the developer's certification
that they have the right to submit the patch for inclusion into
the code base and indicates agreement to the [Developer's Certificate
of Origin](https://www.kernel.org/doc/html/latest/process/submitting-patches.html#sign-your-work-the-developer-s-certificate-of-origin).
Code without a proper signoff cannot be merged.
Git can append the `Signed-off-by` line to your commit messages. Simply
provide the `-s` or `--signoff` option when performing a `git commit`.
For more information about writing commit messages, visit [How to Write
a Git Commit Message](https://chris.beams.io/posts/git-commit/).
#### Co-authored By
If someone else had part in your pull request, please add the following to the commit:
`Co-authored-by: Name <gitregistered@email.address>`
This is useful if their authorship was lost during squashing, rebasing, etc.,
but may be used in any situation where there are co-authors.
The email address used here should be the same as on the GitHub profile of said user.
If said user does not have their email address public, please use the following instead:
`Co-authored-by: Name <[username]@users.noreply.github.com>`

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---
name: Bug report
about: Create a report to help us improve OpenZFS
title: ''
labels: 'Type: Defect'
assignees: ''
---
<!-- Please fill out the following template, which will help other contributors address your issue. -->
<!--
Thank you for reporting an issue.
*IMPORTANT* - Please check our issue tracker before opening a new issue.
Additional valuable information can be found in the OpenZFS documentation
and mailing list archives.
Please fill in as much of the template as possible.
-->
### System information
<!-- add version after "|" character -->
Type | Version/Name
--- | ---
Distribution Name |
Distribution Version |
Linux Kernel |
Architecture |
ZFS Version |
SPL Version |
<!--
Commands to find ZFS/SPL versions:
modinfo zfs | grep -iw version
modinfo spl | grep -iw version
-->
### Describe the problem you're observing
### Describe how to reproduce the problem
### Include any warning/errors/backtraces from the system logs
<!--
*IMPORTANT* - Please mark logs and text output from terminal commands
or else Github will not display them correctly.
An example is provided below.
Example:
```
this is an example how log text should be marked (wrap it with ```)
```
-->

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blank_issues_enabled: false
contact_links:
- name: OpenZFS Community Support Mailing list (Linux)
url: https://zfsonlinux.topicbox.com/groups/zfs-discuss
about: Get community support for OpenZFS on Linux
- name: FreeBSD Community Support Mailing list
url: https://lists.freebsd.org/mailman/listinfo/freebsd-fs
about: Get community support for OpenZFS on FreeBSD
- name: OpenZFS on IRC
url: https://webchat.freenode.net/#openzfs
about: Use IRC to get community support for OpenZFS

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---
name: Feature request
about: Suggest a feature for OpenZFS
title: ''
labels: 'Type: Feature'
assignees: ''
---
<!--
Thank you for suggesting a feature.
Please check our issue tracker before opening a new feature request.
Filling out the following template will help other contributors better understand your proposed feature.
-->
### Describe the feature would like to see added to OpenZFS
<!--
Provide a clear and concise description of the feature.
-->
### How will this feature improve OpenZFS?
<!--
What problem does this feature solve?
-->
### Additional context
<!--
Any additional information you can add about the proposal?
-->

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---
name: Code Question
about: Ask a question about the code
title: ''
labels: 'Type: Question'
assignees: ''
---
<!--
Thank you for taking an interest in the OpenZFS codebase.
Please be aware that most questions are preferably asked in the mailing list first.
This form is primarily meant for asking questions about the code itself.
Please also check our issue tracker before opening a new question.
Filling out the following template will help other contributors better understand your question.
-->
### Ask your question!
<!--
Please provide a clear and concise question.
-->
### Which portion of the codebase does your question involve?
<!--
Optional: Please describe what portion of the codebase your issue involved.
Example: "Testsuite", "Buildbots", "CLI", a code snippet etc.
-->
### Additional context
<!--
Any additional information you want to add?
-->

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<!--- Please fill out the following template, which will help other contributors review your Pull Request. -->
<!--- Provide a general summary of your changes in the Title above -->
<!---
Documentation on ZFS Buildbot options can be found at
https://openzfs.github.io/openzfs-docs/Developer%20Resources/Buildbot%20Options.html
-->
### Motivation and Context
<!--- Why is this change required? What problem does it solve? -->
<!--- If it fixes an open issue, please link to the issue here. -->
### Description
<!--- Describe your changes in detail -->
### How Has This Been Tested?
<!--- Please describe in detail how you tested your changes. -->
<!--- Include details of your testing environment, and the tests you ran to -->
<!--- see how your change affects other areas of the code, etc. -->
<!--- If your change is a performance enhancement, please provide benchmarks here. -->
<!--- Please think about using the draft PR feature if appropriate -->
### Types of changes
<!--- What types of changes does your code introduce? Put an `x` in all the boxes that apply: -->
- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Performance enhancement (non-breaking change which improves efficiency)
- [ ] Code cleanup (non-breaking change which makes code smaller or more readable)
- [ ] Breaking change (fix or feature that would cause existing functionality to change)
- [ ] Documentation (a change to man pages or other documentation)
### Checklist:
<!--- Go over all the following points, and put an `x` in all the boxes that apply. -->
<!--- If you're unsure about any of these, don't hesitate to ask. We're here to help! -->
- [ ] My code follows the ZFS on Linux [code style requirements](https://github.com/zfsonlinux/zfs/blob/master/.github/CONTRIBUTING.md#coding-conventions).
- [ ] I have updated the documentation accordingly.
- [ ] I have read the [**contributing** document](https://github.com/zfsonlinux/zfs/blob/master/.github/CONTRIBUTING.md).
- [ ] I have added [tests](https://github.com/zfsonlinux/zfs/tree/master/tests) to cover my changes.
- [ ] I have run the ZFS Test Suite with this change applied.
- [ ] All commit messages are properly formatted and contain [`Signed-off-by`](https://github.com/zfsonlinux/zfs/blob/master/.github/CONTRIBUTING.md#signed-off-by).

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codecov:
notify:
require_ci_to_pass: false # always post
after_n_builds: 2 # user and kernel
coverage:
precision: 0 # 0 decimals of precision
round: nearest # Round to nearest precision point
range: "50...90" # red -> yellow -> green
status:
project:
default:
threshold: 1% # allow 1% coverage variance
patch:
default:
threshold: 1% # allow 1% coverage variance
comment:
layout: "reach, diff, flags, footer"
behavior: once # update if exists; post new; skip if deleted
require_changes: yes # only post when coverage changes
# ignore: Please place any ignores in config/ax_code_coverage.m4 instead

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# Number of days of inactivity before an issue becomes stale
daysUntilStale: 365
# Number of days of inactivity before a stale issue is closed
daysUntilClose: 90
# Limit to only `issues` or `pulls`
only: issues
# Issues with these labels will never be considered stale
exemptLabels:
- "Type: Feature"
- "Type: Understood"
# Label to use when marking an issue as stale
staleLabel: "Status: Stale"
# Comment to post when marking an issue as stale. Set to `false` to disable
markComment: >
This issue has been automatically marked as "stale" because it has not had
any activity for a while. It will be closed in 90 days if no further activity occurs.
Thank you for your contributions.

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name: checkstyle
on:
push:
pull_request_target:
jobs:
checkstyle:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v2
with:
ref: ${{ github.event.pull_request.head.sha }}
- name: Install dependencies
run: |
sudo apt-get update
sudo apt-get install --yes -qq build-essential autoconf libtool gawk alien fakeroot linux-headers-$(uname -r)
sudo apt-get install --yes -qq zlib1g-dev uuid-dev libattr1-dev libblkid-dev libselinux-dev libudev-dev libssl-dev python-dev python-setuptools python-cffi python3 python3-dev python3-setuptools python3-cffi
# packages for tests
sudo apt-get install --yes -qq parted lsscsi ksh attr acl nfs-kernel-server fio
sudo apt-get install --yes -qq mandoc cppcheck pax-utils # devscripts - enable then bashisms fixed
sudo -E pip --quiet install flake8
- name: Prepare
run: |
sh ./autogen.sh
./configure
- name: Checkstyle
run: |
make checkstyle
- name: Lint
run: |
make lint

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#
# N.B.
# This is the toplevel .gitignore file.
# This is not the place for entries that are specific to
# a subdirectory. Instead add those files to the
# .gitignore file in that subdirectory.
#
# N.B.
# Please use 'git ls-files -i --exclude-standard'
# command after changing this file, to see if there are
# any tracked files which get ignored after the change.
#
# Normal rules
#
*.[oa]
*.o.ur-safe
*.lo
*.la
*.mod.c
*~
*.swp
*.gcno
*.gcda
*.pyc
*.pyo
.deps
.libs
.dirstamp
.DS_Store
modules.order
Makefile
Makefile.in
#
# Top level generated files specific to this top level dir
#
/bin
/build
/configure
/config.log
/config.status
/libtool
/zfs_config.h
/zfs_config.h.in
/zfs.release
/stamp-h1
/aclocal.m4
/autom4te.cache
#
# Top level generic files
#
!.gitignore
tags
TAGS
current
cscope.*
*.rpm
*.deb
*.tar.gz
*.patch
*.orig
*.log
*.tmp
venv
*.so
*.so.debug
*.so.full

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[submodule "scripts/zfs-images"]
path = scripts/zfs-images
url = https://github.com/zfsonlinux/zfs-images

308
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MAINTAINERS:
Brian Behlendorf <behlendorf1@llnl.gov>
Tony Hutter <hutter2@llnl.gov>
PAST MAINTAINERS:
Ned Bass <bass6@llnl.gov>
CONTRIBUTORS:
Aaron Fineman <abyxcos@gmail.com>
Adam Leventhal <ahl@delphix.com>
Adam Stevko <adam.stevko@gmail.com>
Ahmed G <ahmedg@delphix.com>
Akash Ayare <aayare@delphix.com>
Alan Somers <asomers@gmail.com>
Alar Aun <spamtoaun@gmail.com>
Albert Lee <trisk@nexenta.com>
Alec Salazar <alec.j.salazar@gmail.com>
Alejandro R. Sedeño <asedeno@mit.edu>
Alek Pinchuk <alek@nexenta.com>
Alex Braunegg <alex.braunegg@gmail.com>
Alex McWhirter <alexmcwhirter@triadic.us>
Alex Reece <alex@delphix.com>
Alex Wilson <alex.wilson@joyent.com>
Alex Zhuravlev <alexey.zhuravlev@intel.com>
Alexander Eremin <a.eremin@nexenta.com>
Alexander Motin <mav@freebsd.org>
Alexander Pyhalov <apyhalov@gmail.com>
Alexander Stetsenko <ams@nexenta.com>
Alexey Shvetsov <alexxy@gentoo.org>
Alexey Smirnoff <fling@member.fsf.org>
Allan Jude <allanjude@freebsd.org>
AndCycle <andcycle@andcycle.idv.tw>
Andreas Buschmann <andreas.buschmann@tech.net.de>
Andreas Dilger <adilger@intel.com>
Andrew Barnes <barnes333@gmail.com>
Andrew Hamilton <ahamilto@tjhsst.edu>
Andrew Reid <ColdCanuck@nailedtotheperch.com>
Andrew Stormont <andrew.stormont@nexenta.com>
Andrew Tselischev <andrewtselischev@gmail.com>
Andrey Vesnovaty <andrey.vesnovaty@gmail.com>
Andriy Gapon <avg@freebsd.org>
Andy Bakun <github@thwartedefforts.org>
Aniruddha Shankar <k@191a.net>
Antonio Russo <antonio.e.russo@gmail.com>
Arkadiusz Bubała <arkadiusz.bubala@open-e.com>
Arne Jansen <arne@die-jansens.de>
Aron Xu <happyaron.xu@gmail.com>
Bart Coddens <bart.coddens@gmail.com>
Basil Crow <basil.crow@delphix.com>
Huang Liu <liu.huang@zte.com.cn>
Ben Allen <bsallen@alcf.anl.gov>
Ben Rubson <ben.rubson@gmail.com>
Benjamin Albrecht <git@albrecht.io>
Bill McGonigle <bill-github.com-public1@bfccomputing.com>
Bill Pijewski <wdp@joyent.com>
Boris Protopopov <boris.protopopov@nexenta.com>
Brad Lewis <brad.lewis@delphix.com>
Brian Behlendorf <behlendorf1@llnl.gov>
Brian J. Murrell <brian@sun.com>
Caleb James DeLisle <calebdelisle@lavabit.com>
Cao Xuewen <cao.xuewen@zte.com.cn>
Carlo Landmeter <clandmeter@gmail.com>
Carlos Alberto Lopez Perez <clopez@igalia.com>
Chaoyu Zhang <zhang.chaoyu@zte.com.cn>
Chen Can <chen.can2@zte.com.cn>
Chen Haiquan <oc@yunify.com>
Chip Parker <aparker@enthought.com>
Chris Burroughs <chris.burroughs@gmail.com>
Chris Dunlap <cdunlap@llnl.gov>
Chris Dunlop <chris@onthe.net.au>
Chris Siden <chris.siden@delphix.com>
Chris Wedgwood <cw@f00f.org>
Chris Williamson <chris.williamson@delphix.com>
Chris Zubrzycki <github@mid-earth.net>
Christ Schlacta <aarcane@aarcane.info>
Christer Ekholm <che@chrekh.se>
Christian Kohlschütter <christian@kohlschutter.com>
Christian Neukirchen <chneukirchen@gmail.com>
Christian Schwarz <me@cschwarz.com>
Christopher Voltz <cjunk@voltz.ws>
Chunwei Chen <david.chen@nutanix.com>
Clemens Fruhwirth <clemens@endorphin.org>
Coleman Kane <ckane@colemankane.org>
Colin Ian King <colin.king@canonical.com>
Craig Loomis <cloomis@astro.princeton.edu>
Craig Sanders <github@taz.net.au>
Cyril Plisko <cyril.plisko@infinidat.com>
DHE <git@dehacked.net>
Damian Wojsław <damian@wojslaw.pl>
Dan Kimmel <dan.kimmel@delphix.com>
Dan McDonald <danmcd@nexenta.com>
Dan Swartzendruber <dswartz@druber.com>
Dan Vatca <dan.vatca@gmail.com>
Daniel Hoffman <dj.hoffman@delphix.com>
Daniel Verite <daniel@verite.pro>
Daniil Lunev <d.lunev.mail@gmail.com>
Darik Horn <dajhorn@vanadac.com>
Dave Eddy <dave@daveeddy.com>
David Lamparter <equinox@diac24.net>
David Qian <david.qian@intel.com>
David Quigley <david.quigley@intel.com>
Debabrata Banerjee <dbanerje@akamai.com>
Denys Rtveliashvili <denys@rtveliashvili.name>
Derek Dai <daiderek@gmail.com>
Dimitri John Ledkov <xnox@ubuntu.com>
Dmitry Khasanov <pik4ez@gmail.com>
Dominik Hassler <hadfl@omniosce.org>
Dominik Honnef <dominikh@fork-bomb.org>
Don Brady <don.brady@delphix.com>
Dr. András Korn <korn-github.com@elan.rulez.org>
Eli Rosenthal <eli.rosenthal@delphix.com>
Eric Desrochers <eric.desrochers@canonical.com>
Eric Dillmann <eric@jave.fr>
Eric Schrock <Eric.Schrock@delphix.com>
Etienne Dechamps <etienne@edechamps.fr>
Evan Susarret <evansus@gmail.com>
Fabian Grünbichler <f.gruenbichler@proxmox.com>
Fajar A. Nugraha <github@fajar.net>
Fan Yong <fan.yong@intel.com>
Feng Sun <loyou85@gmail.com>
Frederik Wessels <wessels147@gmail.com>
Frédéric Vanniere <f.vanniere@planet-work.com>
Garrett D'Amore <garrett@nexenta.com>
Garrison Jensen <garrison.jensen@gmail.com>
Gary Mills <gary_mills@fastmail.fm>
Gaurav Kumar <gauravk.18@gmail.com>
GeLiXin <ge.lixin@zte.com.cn>
George Amanakis <g_amanakis@yahoo.com>
George Melikov <mail@gmelikov.ru>
George Wilson <gwilson@delphix.com>
Georgy Yakovlev <ya@sysdump.net>
Giuseppe Di Natale <guss80@gmail.com>
Gordan Bobic <gordan@redsleeve.org>
Gordon Ross <gwr@nexenta.com>
Gregor Kopka <gregor@kopka.net>
Grischa Zengel <github.zfsonlinux@zengel.info>
Gunnar Beutner <gunnar@beutner.name>
Gvozden Neskovic <neskovic@gmail.com>
Hajo Möller <dasjoe@gmail.com>
Hans Rosenfeld <hans.rosenfeld@nexenta.com>
Håkan Johansson <f96hajo@chalmers.se>
Igor Kozhukhov <ikozhukhov@gmail.com>
Igor Lvovsky <ilvovsky@gmail.com>
Isaac Huang <he.huang@intel.com>
JK Dingwall <james@dingwall.me.uk>
Jacek Fefliński <feflik@gmail.com>
James Cowgill <james.cowgill@mips.com>
James Lee <jlee@thestaticvoid.com>
James Pan <jiaming.pan@yahoo.com>
Jan Engelhardt <jengelh@inai.de>
Jan Kryl <jan.kryl@nexenta.com>
Jan Sanislo <oystr@cs.washington.edu>
Jason King <jason.brian.king@gmail.com>
Jason Zaman <jasonzaman@gmail.com>
Javen Wu <wu.javen@gmail.com>
Jeremy Gill <jgill@parallax-innovations.com>
Jeremy Jones <jeremy@delphix.com>
Jerry Jelinek <jerry.jelinek@joyent.com>
Jinshan Xiong <jinshan.xiong@intel.com>
Joe Stein <joe.stein@delphix.com>
John Albietz <inthecloud247@gmail.com>
John Eismeier <john.eismeier@gmail.com>
John L. Hammond <john.hammond@intel.com>
John Layman <jlayman@sagecloud.com>
John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
John Wren Kennedy <john.kennedy@delphix.com>
Johnny Stenback <github@jstenback.com>
Jorgen Lundman <lundman@lundman.net>
Josef 'Jeff' Sipek <josef.sipek@nexenta.com>
Joshua M. Clulow <josh@sysmgr.org>
Justin Bedő <cu@cua0.org>
Justin Lecher <jlec@gentoo.org>
Justin T. Gibbs <gibbs@FreeBSD.org>
Jörg Thalheim <joerg@higgsboson.tk>
KORN Andras <korn@elan.rulez.org>
Kamil Domański <kamil@domanski.co>
Karsten Kretschmer <kkretschmer@gmail.com>
Kash Pande <kash@tripleback.net>
Keith M Wesolowski <wesolows@foobazco.org>
Kevin Tanguy <kevin.tanguy@ovh.net>
KireinaHoro <i@jsteward.moe>
Kjeld Schouten-Lebbing <kjeld@schouten-lebbing.nl>
Kohsuke Kawaguchi <kk@kohsuke.org>
Kyle Blatter <kyleblatter@llnl.gov>
Kyle Fuller <inbox@kylefuller.co.uk>
Loli <ezomori.nozomu@gmail.com>
Lars Johannsen <laj@it.dk>
Li Dongyang <dongyang.li@anu.edu.au>
Li Wei <W.Li@Sun.COM>
Lukas Wunner <lukas@wunner.de>
Madhav Suresh <madhav.suresh@delphix.com>
Manoj Joseph <manoj.joseph@delphix.com>
Manuel Amador (Rudd-O) <rudd-o@rudd-o.com>
Marcel Huber <marcelhuberfoo@gmail.com>
Marcel Telka <marcel.telka@nexenta.com>
Marcel Wysocki <maci.stgn@gmail.com>
Mark Shellenbaum <Mark.Shellenbaum@Oracle.COM>
Mark Wright <markwright@internode.on.net>
Martin Matuska <mm@FreeBSD.org>
Massimo Maggi <me@massimo-maggi.eu>
Matt Johnston <matt@fugro-fsi.com.au>
Matt Kemp <matt@mattikus.com>
Matthew Ahrens <matt@delphix.com>
Matthew Thode <mthode@mthode.org>
Matus Kral <matuskral@me.com>
Max Grossman <max.grossman@delphix.com>
Maximilian Mehnert <maximilian.mehnert@gmx.de>
Michael Gebetsroither <michael@mgeb.org>
Michael Kjorling <michael@kjorling.se>
Michael Martin <mgmartin.mgm@gmail.com>
Michael Niewöhner <foss@mniewoehner.de>
Mike Gerdts <mike.gerdts@joyent.com>
Mike Harsch <mike@harschsystems.com>
Mike Leddy <mike.leddy@gmail.com>
Mike Swanson <mikeonthecomputer@gmail.com>
Milan Jurik <milan.jurik@xylab.cz>
Morgan Jones <mjones@rice.edu>
Moritz Maxeiner <moritz@ucworks.org>
Nathaniel Clark <Nathaniel.Clark@misrule.us>
Nathaniel Wesley Filardo <nwf@cs.jhu.edu>
Nav Ravindranath <nav@delphix.com>
Neal Gompa (ニール・ゴンパ) <ngompa13@gmail.com>
Ned Bass <bass6@llnl.gov>
Neependra Khare <neependra@kqinfotech.com>
Neil Stockbridge <neil@dist.ro>
Nick Garvey <garvey.nick@gmail.com>
Nikolay Borisov <n.borisov.lkml@gmail.com>
Olaf Faaland <faaland1@llnl.gov>
Oleg Drokin <green@linuxhacker.ru>
Oleg Stepura <oleg@stepura.com>
Patrik Greco <sikevux@sikevux.se>
Paul B. Henson <henson@acm.org>
Paul Dagnelie <pcd@delphix.com>
Paul Zuchowski <pzuchowski@datto.com>
Pavel Boldin <boldin.pavel@gmail.com>
Pavel Zakharov <pavel.zakharov@delphix.com>
Pawel Jakub Dawidek <pjd@FreeBSD.org>
Pedro Giffuni <pfg@freebsd.org>
Peng <peng.hse@xtaotech.com>
Peter Ashford <ashford@accs.com>
Prakash Surya <prakash.surya@delphix.com>
Prasad Joshi <prasadjoshi124@gmail.com>
Ralf Ertzinger <ralf@skytale.net>
Randall Mason <ClashTheBunny@gmail.com>
Remy Blank <remy.blank@pobox.com>
Ricardo M. Correia <ricardo.correia@oracle.com>
Rich Ercolani <rincebrain@gmail.com>
Richard Elling <Richard.Elling@RichardElling.com>
Richard Laager <rlaager@wiktel.com>
Richard Lowe <richlowe@richlowe.net>
Richard Sharpe <rsharpe@samba.org>
Richard Yao <ryao@gentoo.org>
Rohan Puri <rohan.puri15@gmail.com>
Romain Dolbeau <romain.dolbeau@atos.net>
Roman Strashkin <roman.strashkin@nexenta.com>
Ruben Kerkhof <ruben@rubenkerkhof.com>
Saso Kiselkov <saso.kiselkov@nexenta.com>
Scot W. Stevenson <scot.stevenson@gmail.com>
Sean Eric Fagan <sef@ixsystems.com>
Sebastian Gottschall <s.gottschall@dd-wrt.com>
Sen Haerens <sen@senhaerens.be>
Serapheim Dimitropoulos <serapheim@delphix.com>
Seth Forshee <seth.forshee@canonical.com>
Shampavman <sham.pavman@nexenta.com>
Shen Yan <shenyanxxxy@qq.com>
Simon Guest <simon.guest@tesujimath.org>
Simon Klinkert <simon.klinkert@gmail.com>
Sowrabha Gopal <sowrabha.gopal@delphix.com>
Stanislav Seletskiy <s.seletskiy@gmail.com>
Steffen Müthing <steffen.muething@iwr.uni-heidelberg.de>
Stephen Blinick <stephen.blinick@delphix.com>
Steve Dougherty <sdougherty@barracuda.com>
Steven Burgess <sburgess@dattobackup.com>
Steven Hartland <smh@freebsd.org>
Steven Johnson <sjohnson@sakuraindustries.com>
Stian Ellingsen <stian@plaimi.net>
Suman Chakravartula <schakrava@gmail.com>
Sydney Vanda <sydney.m.vanda@intel.com>
Sören Tempel <soeren+git@soeren-tempel.net>
Thijs Cramer <thijs.cramer@gmail.com>
Tim Chase <tim@chase2k.com>
Tim Connors <tconnors@rather.puzzling.org>
Tim Crawford <tcrawford@datto.com>
Tim Haley <Tim.Haley@Sun.COM>
Tobin Harding <me@tobin.cc>
Tom Caputi <tcaputi@datto.com>
Tom Matthews <tom@axiom-partners.com>
Tom Prince <tom.prince@ualberta.net>
Tomohiro Kusumi <kusumi.tomohiro@gmail.com>
Tony Hutter <hutter2@llnl.gov>
Toomas Soome <tsoome@me.com>
Trey Dockendorf <treydock@gmail.com>
Turbo Fredriksson <turbo@bayour.com>
Tyler J. Stachecki <stachecki.tyler@gmail.com>
Vitaut Bajaryn <vitaut.bayaryn@gmail.com>
Weigang Li <weigang.li@intel.com>
Will Andrews <will@freebsd.org>
Will Rouesnel <w.rouesnel@gmail.com>
Wolfgang Bumiller <w.bumiller@proxmox.com>
Xin Li <delphij@FreeBSD.org>
Ying Zhu <casualfisher@gmail.com>
YunQiang Su <syq@debian.org>
Yuri Pankov <yuri.pankov@gmail.com>
Yuxuan Shui <yshuiv7@gmail.com>
Zachary Bedell <zac@thebedells.org>

2
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The [OpenZFS Code of Conduct](http://www.open-zfs.org/wiki/Code_of_Conduct)
applies to spaces associated with the OpenZFS project, including GitHub.

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Refer to the git commit log for authoritative copyright attribution.
The original ZFS source code was obtained from Open Solaris which was
released under the terms of the CDDL open source license. Additional
changes have been included from OpenZFS and the Illumos project which
are similarly licensed. These projects can be found on Github at:
* https://github.com/illumos/illumos-gate
* https://github.com/openzfs/openzfs
Unless otherwise noted, all files in this distribution are released
under the Common Development and Distribution License (CDDL).
Exceptions are noted within the associated source files headers and
by including a THIRDPARTYLICENSE file with the license terms. A few
notable exceptions and their respective licenses include:
* Skein Checksum Implementation: module/icp/algs/skein/THIRDPARTYLICENSE
* AES Implementation: module/icp/asm-x86_64/aes/THIRDPARTYLICENSE.gladman
* AES Implementation: module/icp/asm-x86_64/aes/THIRDPARTYLICENSE.openssl
* PBKDF2 Implementation: lib/libzfs/THIRDPARTYLICENSE.openssl
* SPL Implementation: module/os/linux/spl/THIRDPARTYLICENSE.gplv2
* GCM Implementation: module/icp/asm-x86_64/modes/THIRDPARTYLICENSE.cryptogams
* GCM Implementation: module/icp/asm-x86_64/modes/THIRDPARTYLICENSE.openssl
* GHASH Implementation: module/icp/asm-x86_64/modes/THIRDPARTYLICENSE.cryptogams
* GHASH Implementation: module/icp/asm-x86_64/modes/THIRDPARTYLICENSE.openssl
This product includes software developed by the OpenSSL Project for use
in the OpenSSL Toolkit (http://www.openssl.org/)
See the LICENSE and NOTICE for more information.

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Unless otherwise noted, all files in this distribution are released
under the Common Development and Distribution License (CDDL).
Exceptions are noted within the associated source files.
--------------------------------------------------------------------
COMMON DEVELOPMENT AND DISTRIBUTION LICENSE Version 1.0
1. Definitions.
1.1. "Contributor" means each individual or entity that creates
or contributes to the creation of Modifications.
1.2. "Contributor Version" means the combination of the Original
Software, prior Modifications used by a Contributor (if any),
and the Modifications made by that particular Contributor.
1.3. "Covered Software" means (a) the Original Software, or (b)
Modifications, or (c) the combination of files containing
Original Software with files containing Modifications, in
each case including portions thereof.
1.4. "Executable" means the Covered Software in any form other
than Source Code.
1.5. "Initial Developer" means the individual or entity that first
makes Original Software available under this License.
1.6. "Larger Work" means a work which combines Covered Software or
portions thereof with code not governed by the terms of this
License.
1.7. "License" means this document.
1.8. "Licensable" means having the right to grant, to the maximum
extent possible, whether at the time of the initial grant or
subsequently acquired, any and all of the rights conveyed
herein.
1.9. "Modifications" means the Source Code and Executable form of
any of the following:
A. Any file that results from an addition to, deletion from or
modification of the contents of a file containing Original
Software or previous Modifications;
B. Any new file that contains any part of the Original
Software or previous Modifications; or
C. Any new file that is contributed or otherwise made
available under the terms of this License.
1.10. "Original Software" means the Source Code and Executable
form of computer software code that is originally released
under this License.
1.11. "Patent Claims" means any patent claim(s), now owned or
hereafter acquired, including without limitation, method,
process, and apparatus claims, in any patent Licensable by
grantor.
1.12. "Source Code" means (a) the common form of computer software
code in which modifications are made and (b) associated
documentation included in or with such code.
1.13. "You" (or "Your") means an individual or a legal entity
exercising rights under, and complying with all of the terms
of, this License. For legal entities, "You" includes any
entity which controls, is controlled by, or is under common
control with You. For purposes of this definition,
"control" means (a) the power, direct or indirect, to cause
the direction or management of such entity, whether by
contract or otherwise, or (b) ownership of more than fifty
percent (50%) of the outstanding shares or beneficial
ownership of such entity.
2. License Grants.
2.1. The Initial Developer Grant.
Conditioned upon Your compliance with Section 3.1 below and
subject to third party intellectual property claims, the Initial
Developer hereby grants You a world-wide, royalty-free,
non-exclusive license:
(a) under intellectual property rights (other than patent or
trademark) Licensable by Initial Developer, to use,
reproduce, modify, display, perform, sublicense and
distribute the Original Software (or portions thereof),
with or without Modifications, and/or as part of a Larger
Work; and
(b) under Patent Claims infringed by the making, using or
selling of Original Software, to make, have made, use,
practice, sell, and offer for sale, and/or otherwise
dispose of the Original Software (or portions thereof).
(c) The licenses granted in Sections 2.1(a) and (b) are
effective on the date Initial Developer first distributes
or otherwise makes the Original Software available to a
third party under the terms of this License.
(d) Notwithstanding Section 2.1(b) above, no patent license is
granted: (1) for code that You delete from the Original
Software, or (2) for infringements caused by: (i) the
modification of the Original Software, or (ii) the
combination of the Original Software with other software
or devices.
2.2. Contributor Grant.
Conditioned upon Your compliance with Section 3.1 below and
subject to third party intellectual property claims, each
Contributor hereby grants You a world-wide, royalty-free,
non-exclusive license:
(a) under intellectual property rights (other than patent or
trademark) Licensable by Contributor to use, reproduce,
modify, display, perform, sublicense and distribute the
Modifications created by such Contributor (or portions
thereof), either on an unmodified basis, with other
Modifications, as Covered Software and/or as part of a
Larger Work; and
(b) under Patent Claims infringed by the making, using, or
selling of Modifications made by that Contributor either
alone and/or in combination with its Contributor Version
(or portions of such combination), to make, use, sell,
offer for sale, have made, and/or otherwise dispose of:
(1) Modifications made by that Contributor (or portions
thereof); and (2) the combination of Modifications made by
that Contributor with its Contributor Version (or portions
of such combination).
(c) The licenses granted in Sections 2.2(a) and 2.2(b) are
effective on the date Contributor first distributes or
otherwise makes the Modifications available to a third
party.
(d) Notwithstanding Section 2.2(b) above, no patent license is
granted: (1) for any code that Contributor has deleted
from the Contributor Version; (2) for infringements caused
by: (i) third party modifications of Contributor Version,
or (ii) the combination of Modifications made by that
Contributor with other software (except as part of the
Contributor Version) or other devices; or (3) under Patent
Claims infringed by Covered Software in the absence of
Modifications made by that Contributor.
3. Distribution Obligations.
3.1. Availability of Source Code.
Any Covered Software that You distribute or otherwise make
available in Executable form must also be made available in Source
Code form and that Source Code form must be distributed only under
the terms of this License. You must include a copy of this
License with every copy of the Source Code form of the Covered
Software You distribute or otherwise make available. You must
inform recipients of any such Covered Software in Executable form
as to how they can obtain such Covered Software in Source Code
form in a reasonable manner on or through a medium customarily
used for software exchange.
3.2. Modifications.
The Modifications that You create or to which You contribute are
governed by the terms of this License. You represent that You
believe Your Modifications are Your original creation(s) and/or
You have sufficient rights to grant the rights conveyed by this
License.
3.3. Required Notices.
You must include a notice in each of Your Modifications that
identifies You as the Contributor of the Modification. You may
not remove or alter any copyright, patent or trademark notices
contained within the Covered Software, or any notices of licensing
or any descriptive text giving attribution to any Contributor or
the Initial Developer.
3.4. Application of Additional Terms.
You may not offer or impose any terms on any Covered Software in
Source Code form that alters or restricts the applicable version
of this License or the recipients' rights hereunder. You may
choose to offer, and to charge a fee for, warranty, support,
indemnity or liability obligations to one or more recipients of
Covered Software. However, you may do so only on Your own behalf,
and not on behalf of the Initial Developer or any Contributor.
You must make it absolutely clear that any such warranty, support,
indemnity or liability obligation is offered by You alone, and You
hereby agree to indemnify the Initial Developer and every
Contributor for any liability incurred by the Initial Developer or
such Contributor as a result of warranty, support, indemnity or
liability terms You offer.
3.5. Distribution of Executable Versions.
You may distribute the Executable form of the Covered Software
under the terms of this License or under the terms of a license of
Your choice, which may contain terms different from this License,
provided that You are in compliance with the terms of this License
and that the license for the Executable form does not attempt to
limit or alter the recipient's rights in the Source Code form from
the rights set forth in this License. If You distribute the
Covered Software in Executable form under a different license, You
must make it absolutely clear that any terms which differ from
this License are offered by You alone, not by the Initial
Developer or Contributor. You hereby agree to indemnify the
Initial Developer and every Contributor for any liability incurred
by the Initial Developer or such Contributor as a result of any
such terms You offer.
3.6. Larger Works.
You may create a Larger Work by combining Covered Software with
other code not governed by the terms of this License and
distribute the Larger Work as a single product. In such a case,
You must make sure the requirements of this License are fulfilled
for the Covered Software.
4. Versions of the License.
4.1. New Versions.
Sun Microsystems, Inc. is the initial license steward and may
publish revised and/or new versions of this License from time to
time. Each version will be given a distinguishing version number.
Except as provided in Section 4.3, no one other than the license
steward has the right to modify this License.
4.2. Effect of New Versions.
You may always continue to use, distribute or otherwise make the
Covered Software available under the terms of the version of the
License under which You originally received the Covered Software.
If the Initial Developer includes a notice in the Original
Software prohibiting it from being distributed or otherwise made
available under any subsequent version of the License, You must
distribute and make the Covered Software available under the terms
of the version of the License under which You originally received
the Covered Software. Otherwise, You may also choose to use,
distribute or otherwise make the Covered Software available under
the terms of any subsequent version of the License published by
the license steward.
4.3. Modified Versions.
When You are an Initial Developer and You want to create a new
license for Your Original Software, You may create and use a
modified version of this License if You: (a) rename the license
and remove any references to the name of the license steward
(except to note that the license differs from this License); and
(b) otherwise make it clear that the license contains terms which
differ from this License.
5. DISCLAIMER OF WARRANTY.
COVERED SOFTWARE IS PROVIDED UNDER THIS LICENSE ON AN "AS IS"
BASIS, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED,
INCLUDING, WITHOUT LIMITATION, WARRANTIES THAT THE COVERED
SOFTWARE IS FREE OF DEFECTS, MERCHANTABLE, FIT FOR A PARTICULAR
PURPOSE OR NON-INFRINGING. THE ENTIRE RISK AS TO THE QUALITY AND
PERFORMANCE OF THE COVERED SOFTWARE IS WITH YOU. SHOULD ANY
COVERED SOFTWARE PROVE DEFECTIVE IN ANY RESPECT, YOU (NOT THE
INITIAL DEVELOPER OR ANY OTHER CONTRIBUTOR) ASSUME THE COST OF ANY
NECESSARY SERVICING, REPAIR OR CORRECTION. THIS DISCLAIMER OF
WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS LICENSE. NO USE OF
ANY COVERED SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER THIS
DISCLAIMER.
6. TERMINATION.
6.1. This License and the rights granted hereunder will terminate
automatically if You fail to comply with terms herein and fail to
cure such breach within 30 days of becoming aware of the breach.
Provisions which, by their nature, must remain in effect beyond
the termination of this License shall survive.
6.2. If You assert a patent infringement claim (excluding
declaratory judgment actions) against Initial Developer or a
Contributor (the Initial Developer or Contributor against whom You
assert such claim is referred to as "Participant") alleging that
the Participant Software (meaning the Contributor Version where
the Participant is a Contributor or the Original Software where
the Participant is the Initial Developer) directly or indirectly
infringes any patent, then any and all rights granted directly or
indirectly to You by such Participant, the Initial Developer (if
the Initial Developer is not the Participant) and all Contributors
under Sections 2.1 and/or 2.2 of this License shall, upon 60 days
notice from Participant terminate prospectively and automatically
at the expiration of such 60 day notice period, unless if within
such 60 day period You withdraw Your claim with respect to the
Participant Software against such Participant either unilaterally
or pursuant to a written agreement with Participant.
6.3. In the event of termination under Sections 6.1 or 6.2 above,
all end user licenses that have been validly granted by You or any
distributor hereunder prior to termination (excluding licenses
granted to You by any distributor) shall survive termination.
7. LIMITATION OF LIABILITY.
UNDER NO CIRCUMSTANCES AND UNDER NO LEGAL THEORY, WHETHER TORT
(INCLUDING NEGLIGENCE), CONTRACT, OR OTHERWISE, SHALL YOU, THE
INITIAL DEVELOPER, ANY OTHER CONTRIBUTOR, OR ANY DISTRIBUTOR OF
COVERED SOFTWARE, OR ANY SUPPLIER OF ANY OF SUCH PARTIES, BE
LIABLE TO ANY PERSON FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES OF ANY CHARACTER INCLUDING, WITHOUT
LIMITATION, DAMAGES FOR LOST PROFITS, LOSS OF GOODWILL, WORK
STOPPAGE, COMPUTER FAILURE OR MALFUNCTION, OR ANY AND ALL OTHER
COMMERCIAL DAMAGES OR LOSSES, EVEN IF SUCH PARTY SHALL HAVE BEEN
INFORMED OF THE POSSIBILITY OF SUCH DAMAGES. THIS LIMITATION OF
LIABILITY SHALL NOT APPLY TO LIABILITY FOR DEATH OR PERSONAL
INJURY RESULTING FROM SUCH PARTY'S NEGLIGENCE TO THE EXTENT
APPLICABLE LAW PROHIBITS SUCH LIMITATION. SOME JURISDICTIONS DO
NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR
CONSEQUENTIAL DAMAGES, SO THIS EXCLUSION AND LIMITATION MAY NOT
APPLY TO YOU.
8. U.S. GOVERNMENT END USERS.
The Covered Software is a "commercial item," as that term is
defined in 48 C.F.R. 2.101 (Oct. 1995), consisting of "commercial
computer software" (as that term is defined at 48
C.F.R. 252.227-7014(a)(1)) and "commercial computer software
documentation" as such terms are used in 48 C.F.R. 12.212
(Sept. 1995). Consistent with 48 C.F.R. 12.212 and 48
C.F.R. 227.7202-1 through 227.7202-4 (June 1995), all
U.S. Government End Users acquire Covered Software with only those
rights set forth herein. This U.S. Government Rights clause is in
lieu of, and supersedes, any other FAR, DFAR, or other clause or
provision that addresses Government rights in computer software
under this License.
9. MISCELLANEOUS.
This License represents the complete agreement concerning subject
matter hereof. If any provision of this License is held to be
unenforceable, such provision shall be reformed only to the extent
necessary to make it enforceable. This License shall be governed
by the law of the jurisdiction specified in a notice contained
within the Original Software (except to the extent applicable law,
if any, provides otherwise), excluding such jurisdiction's
conflict-of-law provisions. Any litigation relating to this
License shall be subject to the jurisdiction of the courts located
in the jurisdiction and venue specified in a notice contained
within the Original Software, with the losing party responsible
for costs, including, without limitation, court costs and
reasonable attorneys' fees and expenses. The application of the
United Nations Convention on Contracts for the International Sale
of Goods is expressly excluded. Any law or regulation which
provides that the language of a contract shall be construed
against the drafter shall not apply to this License. You agree
that You alone are responsible for compliance with the United
States export administration regulations (and the export control
laws and regulation of any other countries) when You use,
distribute or otherwise make available any Covered Software.
10. RESPONSIBILITY FOR CLAIMS.
As between Initial Developer and the Contributors, each party is
responsible for claims and damages arising, directly or
indirectly, out of its utilization of rights under this License
and You agree to work with Initial Developer and Contributors to
distribute such responsibility on an equitable basis. Nothing
herein is intended or shall be deemed to constitute any admission
of liability.
--------------------------------------------------------------------
NOTICE PURSUANT TO SECTION 9 OF THE COMMON DEVELOPMENT AND
DISTRIBUTION LICENSE (CDDL)
For Covered Software in this distribution, this License shall
be governed by the laws of the State of California (excluding
conflict-of-law provisions).
Any litigation relating to this License shall be subject to the
jurisdiction of the Federal Courts of the Northern District of
California and the state courts of the State of California, with
venue lying in Santa Clara County, California.

10
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Meta: 1
Name: zfs
Branch: 1.0
Version: 2.0.0
Release: rc6
Release-Tags: relext
License: CDDL
Author: OpenZFS
Linux-Maximum: 5.9
Linux-Minimum: 3.10

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ACLOCAL_AMFLAGS = -I config
SUBDIRS = include
if BUILD_LINUX
SUBDIRS += rpm
endif
if CONFIG_USER
SUBDIRS += etc man scripts lib tests cmd contrib
if BUILD_LINUX
SUBDIRS += udev
endif
endif
if CONFIG_KERNEL
SUBDIRS += module
extradir = $(prefix)/src/zfs-$(VERSION)
extra_HEADERS = zfs.release.in zfs_config.h.in
if BUILD_LINUX
kerneldir = $(prefix)/src/zfs-$(VERSION)/$(LINUX_VERSION)
nodist_kernel_HEADERS = zfs.release zfs_config.h module/$(LINUX_SYMBOLS)
endif
endif
AUTOMAKE_OPTIONS = foreign
EXTRA_DIST = autogen.sh copy-builtin
EXTRA_DIST += cppcheck-suppressions.txt
EXTRA_DIST += config/config.awk config/rpm.am config/deb.am config/tgz.am
EXTRA_DIST += META AUTHORS COPYRIGHT LICENSE NEWS NOTICE README.md
EXTRA_DIST += CODE_OF_CONDUCT.md
EXTRA_DIST += module/lua/README.zfs module/os/linux/spl/README.md
# Include all the extra licensing information for modules
EXTRA_DIST += module/icp/algs/skein/THIRDPARTYLICENSE
EXTRA_DIST += module/icp/algs/skein/THIRDPARTYLICENSE.descrip
EXTRA_DIST += module/icp/asm-x86_64/aes/THIRDPARTYLICENSE.gladman
EXTRA_DIST += module/icp/asm-x86_64/aes/THIRDPARTYLICENSE.gladman.descrip
EXTRA_DIST += module/icp/asm-x86_64/aes/THIRDPARTYLICENSE.openssl
EXTRA_DIST += module/icp/asm-x86_64/aes/THIRDPARTYLICENSE.openssl.descrip
EXTRA_DIST += module/icp/asm-x86_64/modes/THIRDPARTYLICENSE.cryptogams
EXTRA_DIST += module/icp/asm-x86_64/modes/THIRDPARTYLICENSE.cryptogams.descrip
EXTRA_DIST += module/icp/asm-x86_64/modes/THIRDPARTYLICENSE.openssl
EXTRA_DIST += module/icp/asm-x86_64/modes/THIRDPARTYLICENSE.openssl.descrip
EXTRA_DIST += module/os/linux/spl/THIRDPARTYLICENSE.gplv2
EXTRA_DIST += module/os/linux/spl/THIRDPARTYLICENSE.gplv2.descrip
EXTRA_DIST += module/zfs/THIRDPARTYLICENSE.cityhash
EXTRA_DIST += module/zfs/THIRDPARTYLICENSE.cityhash.descrip
@CODE_COVERAGE_RULES@
GITREV = include/zfs_gitrev.h
PHONY = gitrev
gitrev:
$(AM_V_GEN)$(top_srcdir)/scripts/make_gitrev.sh $(GITREV)
all: gitrev
# Double-colon rules are allowed; there are multiple independent definitions.
maintainer-clean-local::
-$(RM) $(GITREV)
distclean-local::
-$(RM) -R autom4te*.cache build
-find . \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS \
-o -name .pc -o -name .hg -o -name .git \) -prune -o \
\( -name '*.orig' -o -name '*.rej' -o -name '*~' \
-o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \
-o -name '.*.rej' -o -size 0 -o -name '*%' -o -name '.*.cmd' \
-o -name 'core' -o -name 'Makefile' -o -name 'Module.symvers' \
-o -name '*.order' -o -name '*.markers' -o -name '*.gcda' \
-o -name '*.gcno' \) \
-type f -print | xargs $(RM)
all-local:
-[ -x ${top_builddir}/scripts/zfs-tests.sh ] && \
${top_builddir}/scripts/zfs-tests.sh -c
dist-hook:
$(AM_V_GEN)$(top_srcdir)/scripts/make_gitrev.sh -D $(distdir) $(GITREV)
$(SED) ${ac_inplace} -e 's/Release:[[:print:]]*/Release: $(RELEASE)/' \
$(distdir)/META
if BUILD_LINUX
# For compatibility, create a matching spl-x.y.z directly which contains
# symlinks to the updated header and object file locations. These
# compatibility links will be removed in the next major release.
if CONFIG_KERNEL
install-data-hook:
rm -rf $(DESTDIR)$(prefix)/src/spl-$(VERSION) && \
mkdir $(DESTDIR)$(prefix)/src/spl-$(VERSION) && \
cd $(DESTDIR)$(prefix)/src/spl-$(VERSION) && \
ln -s ../zfs-$(VERSION)/include/spl include && \
ln -s ../zfs-$(VERSION)/$(LINUX_VERSION) $(LINUX_VERSION) && \
ln -s ../zfs-$(VERSION)/zfs_config.h.in spl_config.h.in && \
ln -s ../zfs-$(VERSION)/zfs.release.in spl.release.in && \
cd $(DESTDIR)$(prefix)/src/zfs-$(VERSION)/$(LINUX_VERSION) && \
ln -fs zfs_config.h spl_config.h && \
ln -fs zfs.release spl.release
endif
endif
PHONY += codecheck
codecheck: cstyle shellcheck checkbashisms flake8 mancheck testscheck vcscheck
PHONY += checkstyle
checkstyle: codecheck commitcheck
PHONY += commitcheck
commitcheck:
@if git rev-parse --git-dir > /dev/null 2>&1; then \
${top_srcdir}/scripts/commitcheck.sh; \
fi
PHONY += cstyle
cstyle:
@find ${top_srcdir} -name build -prune \
-o -type f -name '*.[hc]' \
! -name 'zfs_config.*' ! -name '*.mod.c' \
! -name 'opt_global.h' ! -name '*_if*.h' \
! -path './module/zstd/lib/*' \
-exec ${top_srcdir}/scripts/cstyle.pl -cpP {} \+
filter_executable = -exec test -x '{}' \; -print
PHONY += shellcheck
shellcheck:
@if type shellcheck > /dev/null 2>&1; then \
shellcheck --exclude=SC1090 --exclude=SC1117 --format=gcc \
$$(find ${top_srcdir}/scripts/*.sh -type f) \
$$(find ${top_srcdir}/cmd/zed/zed.d/*.sh -type f) \
$$(find ${top_srcdir}/cmd/zpool/zpool.d/* \
-type f ${filter_executable}); \
else \
echo "skipping shellcheck because shellcheck is not installed"; \
fi
PHONY += checkbashisms
checkbashisms:
@if type checkbashisms > /dev/null 2>&1; then \
checkbashisms -n -p -x \
$$(find ${top_srcdir} \
-name '.git' -prune \
-o -name 'build' -prune \
-o -name 'tests' -prune \
-o -name 'config' -prune \
-o -name 'zed-functions.sh*' -prune \
-o -name 'zfs-import*' -prune \
-o -name 'zfs-mount*' -prune \
-o -name 'zfs-zed*' -prune \
-o -name 'smart' -prune \
-o -name 'paxcheck.sh' -prune \
-o -name 'make_gitrev.sh' -prune \
-o -type f ! -name 'config*' \
! -name 'libtool' \
-exec sh -c 'awk "NR==1 && /\#\!.*bin\/sh.*/ {print FILENAME;}" "{}"' \;); \
else \
echo "skipping checkbashisms because checkbashisms is not installed"; \
fi
PHONY += mancheck
mancheck:
@if type mandoc > /dev/null 2>&1; then \
find ${top_srcdir}/man/man8 -type f -name 'zfs.8' \
-o -name 'zpool.8' -o -name 'zdb.8' \
-o -name 'zgenhostid.8' | \
xargs mandoc -Tlint -Werror; \
else \
echo "skipping mancheck because mandoc is not installed"; \
fi
if BUILD_LINUX
stat_fmt = -c '%A %n'
else
stat_fmt = -f '%Sp %N'
endif
PHONY += testscheck
testscheck:
@find ${top_srcdir}/tests/zfs-tests -type f \
\( -name '*.ksh' -not ${filter_executable} \) -o \
\( -name '*.kshlib' ${filter_executable} \) -o \
\( -name '*.shlib' ${filter_executable} \) -o \
\( -name '*.cfg' ${filter_executable} \) | \
xargs -r stat ${stat_fmt} | \
awk '{c++; print} END {if(c>0) exit 1}'
PHONY += vcscheck
vcscheck:
@if git rev-parse --git-dir > /dev/null 2>&1; then \
git ls-files . --exclude-standard --others | \
awk '{c++; print} END {if(c>0) exit 1}' ; \
fi
PHONY += lint
lint: cppcheck paxcheck
PHONY += cppcheck
cppcheck:
@if type cppcheck > /dev/null 2>&1; then \
cppcheck --quiet --force --error-exitcode=2 --inline-suppr \
--suppressions-list=${top_srcdir}/cppcheck-suppressions.txt \
-UHAVE_SSE2 -UHAVE_AVX512F -UHAVE_UIO_ZEROCOPY \
${top_srcdir}; \
else \
echo "skipping cppcheck because cppcheck is not installed"; \
fi
PHONY += paxcheck
paxcheck:
@if type scanelf > /dev/null 2>&1; then \
${top_srcdir}/scripts/paxcheck.sh ${top_builddir}; \
else \
echo "skipping paxcheck because scanelf is not installed"; \
fi
PHONY += flake8
flake8:
@if type flake8 > /dev/null 2>&1; then \
flake8 ${top_srcdir}; \
else \
echo "skipping flake8 because flake8 is not installed"; \
fi
PHONY += ctags
ctags:
$(RM) tags
find $(top_srcdir) -name '.?*' -prune \
-o -type f -name '*.[hcS]' -print | xargs ctags -a
PHONY += etags
etags:
$(RM) TAGS
find $(top_srcdir) -name '.?*' -prune \
-o -type f -name '*.[hcS]' -print | xargs etags -a
PHONY += cscopelist
cscopelist:
find $(top_srcdir) -name '.?*' -prune \
-o -type f -name '*.[hc]' -print >cscope.files
PHONY += tags
tags: ctags etags
PHONY += pkg pkg-dkms pkg-kmod pkg-utils
pkg: @DEFAULT_PACKAGE@
pkg-dkms: @DEFAULT_PACKAGE@-dkms
pkg-kmod: @DEFAULT_PACKAGE@-kmod
pkg-utils: @DEFAULT_PACKAGE@-utils
include config/rpm.am
include config/deb.am
include config/tgz.am
.PHONY: $(PHONY)

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Descriptions of all releases can be found on github:
https://github.com/openzfs/zfs/releases

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This work was produced under the auspices of the U.S. Department of Energy by
Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.
This work was prepared as an account of work sponsored by an agency of the
United States Government. Neither the United States Government nor Lawrence
Livermore National Security, LLC, nor any of their employees makes any warranty,
expressed or implied, or assumes any legal liability or responsibility for the
accuracy, completeness, or usefulness of any information, apparatus, product, or
process disclosed, or represents that its use would not infringe privately owned
rights. Reference herein to any specific commercial product, process, or service
by trade name, trademark, manufacturer, or otherwise does not necessarily
constitute or imply its endorsement, recommendation, or favoring by the United
States Government or Lawrence Livermore National Security, LLC. The views and
opinions of authors expressed herein do not necessarily state or reflect those
of the United States Government or Lawrence Livermore National Security, LLC,
and shall not be used for advertising or product endorsement purposes.

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![img](https://openzfs.github.io/openzfs-docs/_static/img/logo/480px-Open-ZFS-Secondary-Logo-Colour-halfsize.png)
OpenZFS is an advanced file system and volume manager which was originally
developed for Solaris and is now maintained by the OpenZFS community.
This repository contains the code for running OpenZFS on Linux and FreeBSD.
[![codecov](https://codecov.io/gh/openzfs/zfs/branch/master/graph/badge.svg)](https://codecov.io/gh/openzfs/zfs)
[![coverity](https://scan.coverity.com/projects/1973/badge.svg)](https://scan.coverity.com/projects/openzfs-zfs)
# Official Resources
* [Documentation](https://openzfs.github.io/openzfs-docs/) - for using and developing this repo
* [ZoL Site](https://zfsonlinux.org) - Linux release info & links
* [Mailing lists](https://openzfs.github.io/openzfs-docs/Project%20and%20Community/Mailing%20Lists.html)
* [OpenZFS site](http://open-zfs.org/) - for conference videos and info on other platforms (illumos, OSX, Windows, etc)
# Installation
Full documentation for installing OpenZFS on your favorite operating system can
be found at the [Getting Started Page](https://openzfs.github.io/openzfs-docs/Getting%20Started/index.html).
# Contribute & Develop
We have a separate document with [contribution guidelines](./.github/CONTRIBUTING.md).
We have a [Code of Conduct](./CODE_OF_CONDUCT.md).
# Release
OpenZFS is released under a CDDL license.
For more details see the NOTICE, LICENSE and COPYRIGHT files; `UCRL-CODE-235197`
# Supported Kernels
* The `META` file contains the officially recognized supported Linux kernel versions.
* Supported FreeBSD versions are 12-STABLE and 13-CURRENT.

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#!/bin/sh
### prepare
#TEST_PREPARE_WATCHDOG="yes"
#TEST_PREPARE_SHARES="yes"
### ztest
#TEST_ZTEST_SKIP="yes"
#TEST_ZTEST_TIMEOUT=1800
#TEST_ZTEST_DIR="/var/tmp/"
#TEST_ZTEST_OPTIONS="-V"
#TEST_ZTEST_CORE_DIR="/mnt/zloop"
### zimport
#TEST_ZIMPORT_SKIP="yes"
#TEST_ZIMPORT_DIR="/var/tmp/zimport"
#TEST_ZIMPORT_VERSIONS="master installed"
#TEST_ZIMPORT_POOLS="zol-0.6.1 zol-0.6.2 master installed"
#TEST_ZIMPORT_OPTIONS="-c"
### xfstests
#TEST_XFSTESTS_SKIP="yes"
#TEST_XFSTESTS_URL="https://github.com/behlendorf/xfstests/archive/"
#TEST_XFSTESTS_VER="zfs.tar.gz"
#TEST_XFSTESTS_POOL="tank"
#TEST_XFSTESTS_FS="xfstests"
#TEST_XFSTESTS_VDEV="/var/tmp/vdev"
#TEST_XFSTESTS_OPTIONS=""
### zfs-tests.sh
#TEST_ZFSTESTS_SKIP="yes"
#TEST_ZFSTESTS_DIR="/mnt/"
#TEST_ZFSTESTS_DISKS="vdb vdc vdd"
#TEST_ZFSTESTS_DISKSIZE="8G"
#TEST_ZFSTESTS_ITERS="1"
#TEST_ZFSTESTS_OPTIONS="-vx"
#TEST_ZFSTESTS_RUNFILE="linux.run"
#TEST_ZFSTESTS_TAGS="functional"
### zfsstress
#TEST_ZFSSTRESS_SKIP="yes"
#TEST_ZFSSTRESS_URL="https://github.com/nedbass/zfsstress/archive/"
#TEST_ZFSSTRESS_VER="master.tar.gz"
#TEST_ZFSSTRESS_RUNTIME=300
#TEST_ZFSSTRESS_POOL="tank"
#TEST_ZFSSTRESS_FS="fish"
#TEST_ZFSSTRESS_FSOPT="-o overlay=on"
#TEST_ZFSSTRESS_VDEV="/var/tmp/vdev"
#TEST_ZFSSTRESS_DIR="/$TEST_ZFSSTRESS_POOL/$TEST_ZFSSTRESS_FS"
#TEST_ZFSSTRESS_OPTIONS=""

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#!/bin/sh
autoreconf -fiv || exit 1
rm -Rf autom4te.cache

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SUBDIRS = zfs zpool zdb zhack zinject zstream zstreamdump ztest
SUBDIRS += fsck_zfs vdev_id raidz_test zfs_ids_to_path
if USING_PYTHON
SUBDIRS += arcstat arc_summary dbufstat
endif
if BUILD_LINUX
SUBDIRS += mount_zfs zed zgenhostid zvol_id zvol_wait
endif

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arc_summary

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bin_SCRIPTS = arc_summary
CLEANFILES = arc_summary
EXTRA_DIST = arc_summary2 arc_summary3
if USING_PYTHON_2
SCRIPT = arc_summary2
else
SCRIPT = arc_summary3
endif
arc_summary: $(SCRIPT)
cp $< $@

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#!/usr/bin/env python3
#
# Copyright (c) 2008 Ben Rockwood <benr@cuddletech.com>,
# Copyright (c) 2010 Martin Matuska <mm@FreeBSD.org>,
# Copyright (c) 2010-2011 Jason J. Hellenthal <jhell@DataIX.net>,
# Copyright (c) 2017 Scot W. Stevenson <scot.stevenson@gmail.com>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
"""Print statistics on the ZFS ARC Cache and other information
Provides basic information on the ARC, its efficiency, the L2ARC (if present),
the Data Management Unit (DMU), Virtual Devices (VDEVs), and tunables. See
the in-source documentation and code at
https://github.com/openzfs/zfs/blob/master/module/zfs/arc.c for details.
The original introduction to arc_summary can be found at
http://cuddletech.com/?p=454
"""
import argparse
import os
import subprocess
import sys
import time
DESCRIPTION = 'Print ARC and other statistics for OpenZFS'
INDENT = ' '*8
LINE_LENGTH = 72
DATE_FORMAT = '%a %b %d %H:%M:%S %Y'
TITLE = 'ZFS Subsystem Report'
SECTIONS = 'arc archits dmu l2arc spl tunables vdev zil'.split()
SECTION_HELP = 'print info from one section ('+' '.join(SECTIONS)+')'
# Tunables and SPL are handled separately because they come from
# different sources
SECTION_PATHS = {'arc': 'arcstats',
'dmu': 'dmu_tx',
'l2arc': 'arcstats', # L2ARC stuff lives in arcstats
'vdev': 'vdev_cache_stats',
'xuio': 'xuio_stats',
'zfetch': 'zfetchstats',
'zil': 'zil'}
parser = argparse.ArgumentParser(description=DESCRIPTION)
parser.add_argument('-a', '--alternate', action='store_true', default=False,
help='use alternate formatting for tunables and SPL',
dest='alt')
parser.add_argument('-d', '--description', action='store_true', default=False,
help='print descriptions with tunables and SPL',
dest='desc')
parser.add_argument('-g', '--graph', action='store_true', default=False,
help='print graph on ARC use and exit', dest='graph')
parser.add_argument('-p', '--page', type=int, dest='page',
help='print page by number (DEPRECATED, use "-s")')
parser.add_argument('-r', '--raw', action='store_true', default=False,
help='dump all available data with minimal formatting',
dest='raw')
parser.add_argument('-s', '--section', dest='section', help=SECTION_HELP)
ARGS = parser.parse_args()
if sys.platform.startswith('freebsd'):
# Requires py36-sysctl on FreeBSD
import sysctl
VDEV_CACHE_SIZE = 'vdev.cache_size'
def load_kstats(section):
base = 'kstat.zfs.misc.{section}.'.format(section=section)
# base is removed from the name
fmt = lambda kstat: '{name} : {value}'.format(name=kstat.name[len(base):],
value=kstat.value)
return [fmt(kstat) for kstat in sysctl.filter(base)]
def get_params(base):
cut = 8 # = len('vfs.zfs.')
return {ctl.name[cut:]: str(ctl.value) for ctl in sysctl.filter(base)}
def get_tunable_params():
return get_params('vfs.zfs')
def get_vdev_params():
return get_params('vfs.zfs.vdev')
def get_version_impl(request):
# FreeBSD reports versions for zpl and spa instead of zfs and spl.
name = {'zfs': 'zpl',
'spl': 'spa'}[request]
mib = 'vfs.zfs.version.{}'.format(name)
version = sysctl.filter(mib)[0].value
return '{} version {}'.format(name, version)
def get_descriptions(_request):
# py-sysctl doesn't give descriptions, so we have to shell out.
command = ['sysctl', '-d', 'vfs.zfs']
# The recommended way to do this is with subprocess.run(). However,
# some installed versions of Python are < 3.5, so we offer them
# the option of doing it the old way (for now)
if 'run' in dir(subprocess):
info = subprocess.run(command, stdout=subprocess.PIPE,
universal_newlines=True)
lines = info.stdout.split('\n')
else:
info = subprocess.check_output(command, universal_newlines=True)
lines = info.split('\n')
def fmt(line):
name, desc = line.split(':', 1)
return (name.strip(), desc.strip())
return dict([fmt(line) for line in lines if len(line) > 0])
elif sys.platform.startswith('linux'):
KSTAT_PATH = '/proc/spl/kstat/zfs'
SPL_PATH = '/sys/module/spl/parameters'
TUNABLES_PATH = '/sys/module/zfs/parameters'
VDEV_CACHE_SIZE = 'zfs_vdev_cache_size'
def load_kstats(section):
path = os.path.join(KSTAT_PATH, section)
with open(path) as f:
return list(f)[2:] # Get rid of header
def get_params(basepath):
"""Collect information on the Solaris Porting Layer (SPL) or the
tunables, depending on the PATH given. Does not check if PATH is
legal.
"""
result = {}
for name in os.listdir(basepath):
path = os.path.join(basepath, name)
with open(path) as f:
value = f.read()
result[name] = value.strip()
return result
def get_spl_params():
return get_params(SPL_PATH)
def get_tunable_params():
return get_params(TUNABLES_PATH)
def get_vdev_params():
return get_params(TUNABLES_PATH)
def get_version_impl(request):
# The original arc_summary called /sbin/modinfo/{spl,zfs} to get
# the version information. We switch to /sys/module/{spl,zfs}/version
# to make sure we get what is really loaded in the kernel
command = ["cat", "/sys/module/{0}/version".format(request)]
req = request.upper()
# The recommended way to do this is with subprocess.run(). However,
# some installed versions of Python are < 3.5, so we offer them
# the option of doing it the old way (for now)
if 'run' in dir(subprocess):
info = subprocess.run(command, stdout=subprocess.PIPE,
universal_newlines=True)
version = info.stdout.strip()
else:
info = subprocess.check_output(command, universal_newlines=True)
version = info.strip()
return version
def get_descriptions(request):
"""Get the descriptions of the Solaris Porting Layer (SPL) or the
tunables, return with minimal formatting.
"""
if request not in ('spl', 'zfs'):
print('ERROR: description of "{0}" requested)'.format(request))
sys.exit(1)
descs = {}
target_prefix = 'parm:'
# We would prefer to do this with /sys/modules -- see the discussion at
# get_version() -- but there isn't a way to get the descriptions from
# there, so we fall back on modinfo
command = ["/sbin/modinfo", request, "-0"]
# The recommended way to do this is with subprocess.run(). However,
# some installed versions of Python are < 3.5, so we offer them
# the option of doing it the old way (for now)
info = ''
try:
if 'run' in dir(subprocess):
info = subprocess.run(command, stdout=subprocess.PIPE,
universal_newlines=True)
raw_output = info.stdout.split('\0')
else:
info = subprocess.check_output(command,
universal_newlines=True)
raw_output = info.split('\0')
except subprocess.CalledProcessError:
print("Error: Descriptions not available",
"(can't access kernel module)")
sys.exit(1)
for line in raw_output:
if not line.startswith(target_prefix):
continue
line = line[len(target_prefix):].strip()
name, raw_desc = line.split(':', 1)
desc = raw_desc.rsplit('(', 1)[0]
if desc == '':
desc = '(No description found)'
descs[name.strip()] = desc.strip()
return descs
def cleanup_line(single_line):
"""Format a raw line of data from /proc and isolate the name value
part, returning a tuple with each. Currently, this gets rid of the
middle '4'. For example "arc_no_grow 4 0" returns the tuple
("arc_no_grow", "0").
"""
name, _, value = single_line.split()
return name, value
def draw_graph(kstats_dict):
"""Draw a primitive graph representing the basic information on the
ARC -- its size and the proportion used by MFU and MRU -- and quit.
We use max size of the ARC to calculate how full it is. This is a
very rough representation.
"""
arc_stats = isolate_section('arcstats', kstats_dict)
GRAPH_INDENT = ' '*4
GRAPH_WIDTH = 60
arc_size = f_bytes(arc_stats['size'])
arc_perc = f_perc(arc_stats['size'], arc_stats['c_max'])
mfu_size = f_bytes(arc_stats['mfu_size'])
mru_size = f_bytes(arc_stats['mru_size'])
meta_limit = f_bytes(arc_stats['arc_meta_limit'])
meta_size = f_bytes(arc_stats['arc_meta_used'])
dnode_limit = f_bytes(arc_stats['arc_dnode_limit'])
dnode_size = f_bytes(arc_stats['dnode_size'])
info_form = ('ARC: {0} ({1}) MFU: {2} MRU: {3} META: {4} ({5}) '
'DNODE {6} ({7})')
info_line = info_form.format(arc_size, arc_perc, mfu_size, mru_size,
meta_size, meta_limit, dnode_size,
dnode_limit)
info_spc = ' '*int((GRAPH_WIDTH-len(info_line))/2)
info_line = GRAPH_INDENT+info_spc+info_line
graph_line = GRAPH_INDENT+'+'+('-'*(GRAPH_WIDTH-2))+'+'
mfu_perc = float(int(arc_stats['mfu_size'])/int(arc_stats['c_max']))
mru_perc = float(int(arc_stats['mru_size'])/int(arc_stats['c_max']))
arc_perc = float(int(arc_stats['size'])/int(arc_stats['c_max']))
total_ticks = float(arc_perc)*GRAPH_WIDTH
mfu_ticks = mfu_perc*GRAPH_WIDTH
mru_ticks = mru_perc*GRAPH_WIDTH
other_ticks = total_ticks-(mfu_ticks+mru_ticks)
core_form = 'F'*int(mfu_ticks)+'R'*int(mru_ticks)+'O'*int(other_ticks)
core_spc = ' '*(GRAPH_WIDTH-(2+len(core_form)))
core_line = GRAPH_INDENT+'|'+core_form+core_spc+'|'
for line in ('', info_line, graph_line, core_line, graph_line, ''):
print(line)
def f_bytes(byte_string):
"""Return human-readable representation of a byte value in
powers of 2 (eg "KiB" for "kibibytes", etc) to two decimal
points. Values smaller than one KiB are returned without
decimal points. Note "bytes" is a reserved keyword.
"""
prefixes = ([2**80, "YiB"], # yobibytes (yotta)
[2**70, "ZiB"], # zebibytes (zetta)
[2**60, "EiB"], # exbibytes (exa)
[2**50, "PiB"], # pebibytes (peta)
[2**40, "TiB"], # tebibytes (tera)
[2**30, "GiB"], # gibibytes (giga)
[2**20, "MiB"], # mebibytes (mega)
[2**10, "KiB"]) # kibibytes (kilo)
bites = int(byte_string)
if bites >= 2**10:
for limit, unit in prefixes:
if bites >= limit:
value = bites / limit
break
result = '{0:.1f} {1}'.format(value, unit)
else:
result = '{0} Bytes'.format(bites)
return result
def f_hits(hits_string):
"""Create a human-readable representation of the number of hits.
The single-letter symbols used are SI to avoid the confusion caused
by the different "short scale" and "long scale" representations in
English, which use the same words for different values. See
https://en.wikipedia.org/wiki/Names_of_large_numbers and:
https://physics.nist.gov/cuu/Units/prefixes.html
"""
numbers = ([10**24, 'Y'], # yotta (septillion)
[10**21, 'Z'], # zetta (sextillion)
[10**18, 'E'], # exa (quintrillion)
[10**15, 'P'], # peta (quadrillion)
[10**12, 'T'], # tera (trillion)
[10**9, 'G'], # giga (billion)
[10**6, 'M'], # mega (million)
[10**3, 'k']) # kilo (thousand)
hits = int(hits_string)
if hits >= 1000:
for limit, symbol in numbers:
if hits >= limit:
value = hits/limit
break
result = "%0.1f%s" % (value, symbol)
else:
result = "%d" % hits
return result
def f_perc(value1, value2):
"""Calculate percentage and return in human-readable form. If
rounding produces the result '0.0' though the first number is
not zero, include a 'less-than' symbol to avoid confusion.
Division by zero is handled by returning 'n/a'; no error
is called.
"""
v1 = float(value1)
v2 = float(value2)
try:
perc = 100 * v1/v2
except ZeroDivisionError:
result = 'n/a'
else:
result = '{0:0.1f} %'.format(perc)
if result == '0.0 %' and v1 > 0:
result = '< 0.1 %'
return result
def format_raw_line(name, value):
"""For the --raw option for the tunable and SPL outputs, decide on the
correct formatting based on the --alternate flag.
"""
if ARGS.alt:
result = '{0}{1}={2}'.format(INDENT, name, value)
else:
spc = LINE_LENGTH-(len(INDENT)+len(value))
result = '{0}{1:<{spc}}{2}'.format(INDENT, name, value, spc=spc)
return result
def get_kstats():
"""Collect information on the ZFS subsystem. The step does not perform any
further processing, giving us the option to only work on what is actually
needed. The name "kstat" is a holdover from the Solaris utility of the same
name.
"""
result = {}
for section in SECTION_PATHS.values():
if section not in result:
result[section] = load_kstats(section)
return result
def get_version(request):
"""Get the version number of ZFS or SPL on this machine for header.
Returns an error string, but does not raise an error, if we can't
get the ZFS/SPL version.
"""
if request not in ('spl', 'zfs'):
error_msg = '(ERROR: "{0}" requested)'.format(request)
return error_msg
return get_version_impl(request)
def print_header():
"""Print the initial heading with date and time as well as info on the
kernel and ZFS versions. This is not called for the graph.
"""
# datetime is now recommended over time but we keep the exact formatting
# from the older version of arc_summary in case there are scripts
# that expect it in this way
daydate = time.strftime(DATE_FORMAT)
spc_date = LINE_LENGTH-len(daydate)
sys_version = os.uname()
sys_msg = sys_version.sysname+' '+sys_version.release
zfs = get_version('zfs')
spc_zfs = LINE_LENGTH-len(zfs)
machine_msg = 'Machine: '+sys_version.nodename+' ('+sys_version.machine+')'
spl = get_version('spl')
spc_spl = LINE_LENGTH-len(spl)
print('\n'+('-'*LINE_LENGTH))
print('{0:<{spc}}{1}'.format(TITLE, daydate, spc=spc_date))
print('{0:<{spc}}{1}'.format(sys_msg, zfs, spc=spc_zfs))
print('{0:<{spc}}{1}\n'.format(machine_msg, spl, spc=spc_spl))
def print_raw(kstats_dict):
"""Print all available data from the system in a minimally sorted format.
This can be used as a source to be piped through 'grep'.
"""
sections = sorted(kstats_dict.keys())
for section in sections:
print('\n{0}:'.format(section.upper()))
lines = sorted(kstats_dict[section])
for line in lines:
name, value = cleanup_line(line)
print(format_raw_line(name, value))
# Tunables and SPL must be handled separately because they come from a
# different source and have descriptions the user might request
print()
section_spl()
section_tunables()
def isolate_section(section_name, kstats_dict):
"""From the complete information on all sections, retrieve only those
for one section.
"""
try:
section_data = kstats_dict[section_name]
except KeyError:
print('ERROR: Data on {0} not available'.format(section_data))
sys.exit(1)
section_dict = dict(cleanup_line(l) for l in section_data)
return section_dict
# Formatted output helper functions
def prt_1(text, value):
"""Print text and one value, no indent"""
spc = ' '*(LINE_LENGTH-(len(text)+len(value)))
print('{0}{spc}{1}'.format(text, value, spc=spc))
def prt_i1(text, value):
"""Print text and one value, with indent"""
spc = ' '*(LINE_LENGTH-(len(INDENT)+len(text)+len(value)))
print(INDENT+'{0}{spc}{1}'.format(text, value, spc=spc))
def prt_2(text, value1, value2):
"""Print text and two values, no indent"""
values = '{0:>9} {1:>9}'.format(value1, value2)
spc = ' '*(LINE_LENGTH-(len(text)+len(values)+2))
print('{0}{spc} {1}'.format(text, values, spc=spc))
def prt_i2(text, value1, value2):
"""Print text and two values, with indent"""
values = '{0:>9} {1:>9}'.format(value1, value2)
spc = ' '*(LINE_LENGTH-(len(INDENT)+len(text)+len(values)+2))
print(INDENT+'{0}{spc} {1}'.format(text, values, spc=spc))
# The section output concentrates on important parameters instead of
# being exhaustive (that is what the --raw parameter is for)
def section_arc(kstats_dict):
"""Give basic information on the ARC, MRU and MFU. This is the first
and most used section.
"""
arc_stats = isolate_section('arcstats', kstats_dict)
throttle = arc_stats['memory_throttle_count']
if throttle == '0':
health = 'HEALTHY'
else:
health = 'THROTTLED'
prt_1('ARC status:', health)
prt_i1('Memory throttle count:', throttle)
print()
arc_size = arc_stats['size']
arc_target_size = arc_stats['c']
arc_max = arc_stats['c_max']
arc_min = arc_stats['c_min']
mfu_size = arc_stats['mfu_size']
mru_size = arc_stats['mru_size']
meta_limit = arc_stats['arc_meta_limit']
meta_size = arc_stats['arc_meta_used']
dnode_limit = arc_stats['arc_dnode_limit']
dnode_size = arc_stats['dnode_size']
target_size_ratio = '{0}:1'.format(int(arc_max) // int(arc_min))
prt_2('ARC size (current):',
f_perc(arc_size, arc_max), f_bytes(arc_size))
prt_i2('Target size (adaptive):',
f_perc(arc_target_size, arc_max), f_bytes(arc_target_size))
prt_i2('Min size (hard limit):',
f_perc(arc_min, arc_max), f_bytes(arc_min))
prt_i2('Max size (high water):',
target_size_ratio, f_bytes(arc_max))
caches_size = int(mfu_size)+int(mru_size)
prt_i2('Most Frequently Used (MFU) cache size:',
f_perc(mfu_size, caches_size), f_bytes(mfu_size))
prt_i2('Most Recently Used (MRU) cache size:',
f_perc(mru_size, caches_size), f_bytes(mru_size))
prt_i2('Metadata cache size (hard limit):',
f_perc(meta_limit, arc_max), f_bytes(meta_limit))
prt_i2('Metadata cache size (current):',
f_perc(meta_size, meta_limit), f_bytes(meta_size))
prt_i2('Dnode cache size (hard limit):',
f_perc(dnode_limit, meta_limit), f_bytes(dnode_limit))
prt_i2('Dnode cache size (current):',
f_perc(dnode_size, dnode_limit), f_bytes(dnode_size))
print()
print('ARC hash breakdown:')
prt_i1('Elements max:', f_hits(arc_stats['hash_elements_max']))
prt_i2('Elements current:',
f_perc(arc_stats['hash_elements'], arc_stats['hash_elements_max']),
f_hits(arc_stats['hash_elements']))
prt_i1('Collisions:', f_hits(arc_stats['hash_collisions']))
prt_i1('Chain max:', f_hits(arc_stats['hash_chain_max']))
prt_i1('Chains:', f_hits(arc_stats['hash_chains']))
print()
print('ARC misc:')
prt_i1('Deleted:', f_hits(arc_stats['deleted']))
prt_i1('Mutex misses:', f_hits(arc_stats['mutex_miss']))
prt_i1('Eviction skips:', f_hits(arc_stats['evict_skip']))
print()
def section_archits(kstats_dict):
"""Print information on how the caches are accessed ("arc hits").
"""
arc_stats = isolate_section('arcstats', kstats_dict)
all_accesses = int(arc_stats['hits'])+int(arc_stats['misses'])
actual_hits = int(arc_stats['mfu_hits'])+int(arc_stats['mru_hits'])
prt_1('ARC total accesses (hits + misses):', f_hits(all_accesses))
ta_todo = (('Cache hit ratio:', arc_stats['hits']),
('Cache miss ratio:', arc_stats['misses']),
('Actual hit ratio (MFU + MRU hits):', actual_hits))
for title, value in ta_todo:
prt_i2(title, f_perc(value, all_accesses), f_hits(value))
dd_total = int(arc_stats['demand_data_hits']) +\
int(arc_stats['demand_data_misses'])
prt_i2('Data demand efficiency:',
f_perc(arc_stats['demand_data_hits'], dd_total),
f_hits(dd_total))
dp_total = int(arc_stats['prefetch_data_hits']) +\
int(arc_stats['prefetch_data_misses'])
prt_i2('Data prefetch efficiency:',
f_perc(arc_stats['prefetch_data_hits'], dp_total),
f_hits(dp_total))
known_hits = int(arc_stats['mfu_hits']) +\
int(arc_stats['mru_hits']) +\
int(arc_stats['mfu_ghost_hits']) +\
int(arc_stats['mru_ghost_hits'])
anon_hits = int(arc_stats['hits'])-known_hits
print()
print('Cache hits by cache type:')
cl_todo = (('Most frequently used (MFU):', arc_stats['mfu_hits']),
('Most recently used (MRU):', arc_stats['mru_hits']),
('Most frequently used (MFU) ghost:',
arc_stats['mfu_ghost_hits']),
('Most recently used (MRU) ghost:',
arc_stats['mru_ghost_hits']))
for title, value in cl_todo:
prt_i2(title, f_perc(value, arc_stats['hits']), f_hits(value))
# For some reason, anon_hits can turn negative, which is weird. Until we
# have figured out why this happens, we just hide the problem, following
# the behavior of the original arc_summary.
if anon_hits >= 0:
prt_i2('Anonymously used:',
f_perc(anon_hits, arc_stats['hits']), f_hits(anon_hits))
print()
print('Cache hits by data type:')
dt_todo = (('Demand data:', arc_stats['demand_data_hits']),
('Demand prefetch data:', arc_stats['prefetch_data_hits']),
('Demand metadata:', arc_stats['demand_metadata_hits']),
('Demand prefetch metadata:',
arc_stats['prefetch_metadata_hits']))
for title, value in dt_todo:
prt_i2(title, f_perc(value, arc_stats['hits']), f_hits(value))
print()
print('Cache misses by data type:')
dm_todo = (('Demand data:', arc_stats['demand_data_misses']),
('Demand prefetch data:',
arc_stats['prefetch_data_misses']),
('Demand metadata:', arc_stats['demand_metadata_misses']),
('Demand prefetch metadata:',
arc_stats['prefetch_metadata_misses']))
for title, value in dm_todo:
prt_i2(title, f_perc(value, arc_stats['misses']), f_hits(value))
print()
def section_dmu(kstats_dict):
"""Collect information on the DMU"""
zfetch_stats = isolate_section('zfetchstats', kstats_dict)
zfetch_access_total = int(zfetch_stats['hits'])+int(zfetch_stats['misses'])
prt_1('DMU prefetch efficiency:', f_hits(zfetch_access_total))
prt_i2('Hit ratio:', f_perc(zfetch_stats['hits'], zfetch_access_total),
f_hits(zfetch_stats['hits']))
prt_i2('Miss ratio:', f_perc(zfetch_stats['misses'], zfetch_access_total),
f_hits(zfetch_stats['misses']))
print()
def section_l2arc(kstats_dict):
"""Collect information on L2ARC device if present. If not, tell user
that we're skipping the section.
"""
# The L2ARC statistics live in the same section as the normal ARC stuff
arc_stats = isolate_section('arcstats', kstats_dict)
if arc_stats['l2_size'] == '0':
print('L2ARC not detected, skipping section\n')
return
l2_errors = int(arc_stats['l2_writes_error']) +\
int(arc_stats['l2_cksum_bad']) +\
int(arc_stats['l2_io_error'])
l2_access_total = int(arc_stats['l2_hits'])+int(arc_stats['l2_misses'])
health = 'HEALTHY'
if l2_errors > 0:
health = 'DEGRADED'
prt_1('L2ARC status:', health)
l2_todo = (('Low memory aborts:', 'l2_abort_lowmem'),
('Free on write:', 'l2_free_on_write'),
('R/W clashes:', 'l2_rw_clash'),
('Bad checksums:', 'l2_cksum_bad'),
('I/O errors:', 'l2_io_error'))
for title, value in l2_todo:
prt_i1(title, f_hits(arc_stats[value]))
print()
prt_1('L2ARC size (adaptive):', f_bytes(arc_stats['l2_size']))
prt_i2('Compressed:', f_perc(arc_stats['l2_asize'], arc_stats['l2_size']),
f_bytes(arc_stats['l2_asize']))
prt_i2('Header size:',
f_perc(arc_stats['l2_hdr_size'], arc_stats['l2_size']),
f_bytes(arc_stats['l2_hdr_size']))
print()
prt_1('L2ARC breakdown:', f_hits(l2_access_total))
prt_i2('Hit ratio:',
f_perc(arc_stats['l2_hits'], l2_access_total),
f_hits(arc_stats['l2_hits']))
prt_i2('Miss ratio:',
f_perc(arc_stats['l2_misses'], l2_access_total),
f_hits(arc_stats['l2_misses']))
prt_i1('Feeds:', f_hits(arc_stats['l2_feeds']))
print()
print('L2ARC writes:')
if arc_stats['l2_writes_done'] != arc_stats['l2_writes_sent']:
prt_i2('Writes sent:', 'FAULTED', f_hits(arc_stats['l2_writes_sent']))
prt_i2('Done ratio:',
f_perc(arc_stats['l2_writes_done'],
arc_stats['l2_writes_sent']),
f_hits(arc_stats['l2_writes_done']))
prt_i2('Error ratio:',
f_perc(arc_stats['l2_writes_error'],
arc_stats['l2_writes_sent']),
f_hits(arc_stats['l2_writes_error']))
else:
prt_i2('Writes sent:', '100 %', f_hits(arc_stats['l2_writes_sent']))
print()
print('L2ARC evicts:')
prt_i1('Lock retries:', f_hits(arc_stats['l2_evict_lock_retry']))
prt_i1('Upon reading:', f_hits(arc_stats['l2_evict_reading']))
print()
def section_spl(*_):
"""Print the SPL parameters, if requested with alternative format
and/or descriptions. This does not use kstats.
"""
if sys.platform.startswith('freebsd'):
# No SPL support in FreeBSD
return
spls = get_spl_params()
keylist = sorted(spls.keys())
print('Solaris Porting Layer (SPL):')
if ARGS.desc:
descriptions = get_descriptions('spl')
for key in keylist:
value = spls[key]
if ARGS.desc:
try:
print(INDENT+'#', descriptions[key])
except KeyError:
print(INDENT+'# (No description found)') # paranoid
print(format_raw_line(key, value))
print()
def section_tunables(*_):
"""Print the tunables, if requested with alternative format and/or
descriptions. This does not use kstasts.
"""
tunables = get_tunable_params()
keylist = sorted(tunables.keys())
print('Tunables:')
if ARGS.desc:
descriptions = get_descriptions('zfs')
for key in keylist:
value = tunables[key]
if ARGS.desc:
try:
print(INDENT+'#', descriptions[key])
except KeyError:
print(INDENT+'# (No description found)') # paranoid
print(format_raw_line(key, value))
print()
def section_vdev(kstats_dict):
"""Collect information on VDEV caches"""
# Currently [Nov 2017] the VDEV cache is disabled, because it is actually
# harmful. When this is the case, we just skip the whole entry. See
# https://github.com/openzfs/zfs/blob/master/module/zfs/vdev_cache.c
# for details
tunables = get_vdev_params()
if tunables[VDEV_CACHE_SIZE] == '0':
print('VDEV cache disabled, skipping section\n')
return
vdev_stats = isolate_section('vdev_cache_stats', kstats_dict)
vdev_cache_total = int(vdev_stats['hits']) +\
int(vdev_stats['misses']) +\
int(vdev_stats['delegations'])
prt_1('VDEV cache summary:', f_hits(vdev_cache_total))
prt_i2('Hit ratio:', f_perc(vdev_stats['hits'], vdev_cache_total),
f_hits(vdev_stats['hits']))
prt_i2('Miss ratio:', f_perc(vdev_stats['misses'], vdev_cache_total),
f_hits(vdev_stats['misses']))
prt_i2('Delegations:', f_perc(vdev_stats['delegations'], vdev_cache_total),
f_hits(vdev_stats['delegations']))
print()
def section_zil(kstats_dict):
"""Collect information on the ZFS Intent Log. Some of the information
taken from https://github.com/openzfs/zfs/blob/master/include/sys/zil.h
"""
zil_stats = isolate_section('zil', kstats_dict)
prt_1('ZIL committed transactions:',
f_hits(zil_stats['zil_itx_count']))
prt_i1('Commit requests:', f_hits(zil_stats['zil_commit_count']))
prt_i1('Flushes to stable storage:',
f_hits(zil_stats['zil_commit_writer_count']))
prt_i2('Transactions to SLOG storage pool:',
f_bytes(zil_stats['zil_itx_metaslab_slog_bytes']),
f_hits(zil_stats['zil_itx_metaslab_slog_count']))
prt_i2('Transactions to non-SLOG storage pool:',
f_bytes(zil_stats['zil_itx_metaslab_normal_bytes']),
f_hits(zil_stats['zil_itx_metaslab_normal_count']))
print()
section_calls = {'arc': section_arc,
'archits': section_archits,
'dmu': section_dmu,
'l2arc': section_l2arc,
'spl': section_spl,
'tunables': section_tunables,
'vdev': section_vdev,
'zil': section_zil}
def main():
"""Run program. The options to draw a graph and to print all data raw are
treated separately because they come with their own call.
"""
kstats = get_kstats()
if ARGS.graph:
draw_graph(kstats)
sys.exit(0)
print_header()
if ARGS.raw:
print_raw(kstats)
elif ARGS.section:
try:
section_calls[ARGS.section](kstats)
except KeyError:
print('Error: Section "{0}" unknown'.format(ARGS.section))
sys.exit(1)
elif ARGS.page:
print('WARNING: Pages are deprecated, please use "--section"\n')
pages_to_calls = {1: 'arc',
2: 'archits',
3: 'l2arc',
4: 'dmu',
5: 'vdev',
6: 'tunables'}
try:
call = pages_to_calls[ARGS.page]
except KeyError:
print('Error: Page "{0}" not supported'.format(ARGS.page))
sys.exit(1)
else:
section_calls[call](kstats)
else:
# If no parameters were given, we print all sections. We might want to
# change the sequence by hand
calls = sorted(section_calls.keys())
for section in calls:
section_calls[section](kstats)
sys.exit(0)
if __name__ == '__main__':
main()

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arcstat

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include $(top_srcdir)/config/Substfiles.am
bin_SCRIPTS = arcstat
SUBSTFILES += $(bin_SCRIPTS)

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#!/usr/bin/env @PYTHON_SHEBANG@
#
# Print out ZFS ARC Statistics exported via kstat(1)
# For a definition of fields, or usage, use arcstat -v
#
# This script was originally a fork of the original arcstat.pl (0.1)
# by Neelakanth Nadgir, originally published on his Sun blog on
# 09/18/2007
# http://blogs.sun.com/realneel/entry/zfs_arc_statistics
#
# A new version aimed to improve upon the original by adding features
# and fixing bugs as needed. This version was maintained by Mike
# Harsch and was hosted in a public open source repository:
# http://github.com/mharsch/arcstat
#
# but has since moved to the illumos-gate repository.
#
# This Python port was written by John Hixson for FreeNAS, introduced
# in commit e2c29f:
# https://github.com/freenas/freenas
#
# and has been improved by many people since.
#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License, Version 1.0 only
# (the "License"). You may not use this file except in compliance
# with the License.
#
# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
# or http://www.opensolaris.org/os/licensing.
# See the License for the specific language governing permissions
# and limitations under the License.
#
# When distributing Covered Code, include this CDDL HEADER in each
# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
# If applicable, add the following below this CDDL HEADER, with the
# fields enclosed by brackets "[]" replaced with your own identifying
# information: Portions Copyright [yyyy] [name of copyright owner]
#
# CDDL HEADER END
#
#
# Fields have a fixed width. Every interval, we fill the "v"
# hash with its corresponding value (v[field]=value) using calculate().
# @hdr is the array of fields that needs to be printed, so we
# just iterate over this array and print the values using our pretty printer.
#
# This script must remain compatible with Python 2.6+ and Python 3.4+.
#
import sys
import time
import getopt
import re
import copy
from signal import signal, SIGINT, SIGWINCH, SIG_DFL
cols = {
# HDR: [Size, Scale, Description]
"time": [8, -1, "Time"],
"hits": [4, 1000, "ARC reads per second"],
"miss": [4, 1000, "ARC misses per second"],
"read": [4, 1000, "Total ARC accesses per second"],
"hit%": [4, 100, "ARC hit percentage"],
"miss%": [5, 100, "ARC miss percentage"],
"dhit": [4, 1000, "Demand hits per second"],
"dmis": [4, 1000, "Demand misses per second"],
"dh%": [3, 100, "Demand hit percentage"],
"dm%": [3, 100, "Demand miss percentage"],
"phit": [4, 1000, "Prefetch hits per second"],
"pmis": [4, 1000, "Prefetch misses per second"],
"ph%": [3, 100, "Prefetch hits percentage"],
"pm%": [3, 100, "Prefetch miss percentage"],
"mhit": [4, 1000, "Metadata hits per second"],
"mmis": [4, 1000, "Metadata misses per second"],
"mread": [5, 1000, "Metadata accesses per second"],
"mh%": [3, 100, "Metadata hit percentage"],
"mm%": [3, 100, "Metadata miss percentage"],
"arcsz": [5, 1024, "ARC size"],
"size": [4, 1024, "ARC size"],
"c": [4, 1024, "ARC target size"],
"mfu": [4, 1000, "MFU list hits per second"],
"mru": [4, 1000, "MRU list hits per second"],
"mfug": [4, 1000, "MFU ghost list hits per second"],
"mrug": [4, 1000, "MRU ghost list hits per second"],
"eskip": [5, 1000, "evict_skip per second"],
"mtxmis": [6, 1000, "mutex_miss per second"],
"dread": [5, 1000, "Demand accesses per second"],
"pread": [5, 1000, "Prefetch accesses per second"],
"l2hits": [6, 1000, "L2ARC hits per second"],
"l2miss": [6, 1000, "L2ARC misses per second"],
"l2read": [6, 1000, "Total L2ARC accesses per second"],
"l2hit%": [6, 100, "L2ARC access hit percentage"],
"l2miss%": [7, 100, "L2ARC access miss percentage"],
"l2asize": [7, 1024, "Actual (compressed) size of the L2ARC"],
"l2size": [6, 1024, "Size of the L2ARC"],
"l2bytes": [7, 1024, "Bytes read per second from the L2ARC"],
"grow": [4, 1000, "ARC grow disabled"],
"need": [4, 1024, "ARC reclaim need"],
"free": [4, 1024, "ARC free memory"],
"avail": [5, 1024, "ARC available memory"],
"waste": [5, 1024, "Wasted memory due to round up to pagesize"],
}
v = {}
hdr = ["time", "read", "miss", "miss%", "dmis", "dm%", "pmis", "pm%", "mmis",
"mm%", "size", "c", "avail"]
xhdr = ["time", "mfu", "mru", "mfug", "mrug", "eskip", "mtxmis", "dread",
"pread", "read"]
sint = 1 # Default interval is 1 second
count = 1 # Default count is 1
hdr_intr = 20 # Print header every 20 lines of output
opfile = None
sep = " " # Default separator is 2 spaces
version = "0.4"
l2exist = False
cmd = ("Usage: arcstat [-havxp] [-f fields] [-o file] [-s string] [interval "
"[count]]\n")
cur = {}
d = {}
out = None
kstat = None
pretty_print = True
if sys.platform.startswith('freebsd'):
# Requires py27-sysctl on FreeBSD
import sysctl
def kstat_update():
global kstat
k = sysctl.filter('kstat.zfs.misc.arcstats')
if not k:
sys.exit(1)
kstat = {}
for s in k:
if not s:
continue
name, value = s.name, s.value
# Trims 'kstat.zfs.misc.arcstats' from the name
kstat[name[24:]] = int(value)
elif sys.platform.startswith('linux'):
def kstat_update():
global kstat
k = [line.strip() for line in open('/proc/spl/kstat/zfs/arcstats')]
if not k:
sys.exit(1)
del k[0:2]
kstat = {}
for s in k:
if not s:
continue
name, unused, value = s.split()
kstat[name] = int(value)
def detailed_usage():
sys.stderr.write("%s\n" % cmd)
sys.stderr.write("Field definitions are as follows:\n")
for key in cols:
sys.stderr.write("%11s : %s\n" % (key, cols[key][2]))
sys.stderr.write("\n")
sys.exit(0)
def usage():
sys.stderr.write("%s\n" % cmd)
sys.stderr.write("\t -h : Print this help message\n")
sys.stderr.write("\t -a : Print all possible stats\n")
sys.stderr.write("\t -v : List all possible field headers and definitions"
"\n")
sys.stderr.write("\t -x : Print extended stats\n")
sys.stderr.write("\t -f : Specify specific fields to print (see -v)\n")
sys.stderr.write("\t -o : Redirect output to the specified file\n")
sys.stderr.write("\t -s : Override default field separator with custom "
"character or string\n")
sys.stderr.write("\t -p : Disable auto-scaling of numerical fields\n")
sys.stderr.write("\nExamples:\n")
sys.stderr.write("\tarcstat -o /tmp/a.log 2 10\n")
sys.stderr.write("\tarcstat -s \",\" -o /tmp/a.log 2 10\n")
sys.stderr.write("\tarcstat -v\n")
sys.stderr.write("\tarcstat -f time,hit%,dh%,ph%,mh% 1\n")
sys.stderr.write("\n")
sys.exit(1)
def snap_stats():
global cur
global kstat
prev = copy.deepcopy(cur)
kstat_update()
cur = kstat
for key in cur:
if re.match(key, "class"):
continue
if key in prev:
d[key] = cur[key] - prev[key]
else:
d[key] = cur[key]
def prettynum(sz, scale, num=0):
suffix = [' ', 'K', 'M', 'G', 'T', 'P', 'E', 'Z']
index = 0
save = 0
# Special case for date field
if scale == -1:
return "%s" % num
# Rounding error, return 0
elif 0 < num < 1:
num = 0
while abs(num) > scale and index < 5:
save = num
num = num / scale
index += 1
if index == 0:
return "%*d" % (sz, num)
if abs(save / scale) < 10:
return "%*.1f%s" % (sz - 1, num, suffix[index])
else:
return "%*d%s" % (sz - 1, num, suffix[index])
def print_values():
global hdr
global sep
global v
global pretty_print
if pretty_print:
fmt = lambda col: prettynum(cols[col][0], cols[col][1], v[col])
else:
fmt = lambda col: v[col]
sys.stdout.write(sep.join(fmt(col) for col in hdr))
sys.stdout.write("\n")
sys.stdout.flush()
def print_header():
global hdr
global sep
global pretty_print
if pretty_print:
fmt = lambda col: "%*s" % (cols[col][0], col)
else:
fmt = lambda col: col
sys.stdout.write(sep.join(fmt(col) for col in hdr))
sys.stdout.write("\n")
def get_terminal_lines():
try:
import fcntl
import termios
import struct
data = fcntl.ioctl(sys.stdout.fileno(), termios.TIOCGWINSZ, '1234')
sz = struct.unpack('hh', data)
return sz[0]
except Exception:
pass
def update_hdr_intr():
global hdr_intr
lines = get_terminal_lines()
if lines and lines > 3:
hdr_intr = lines - 3
def resize_handler(signum, frame):
update_hdr_intr()
def init():
global sint
global count
global hdr
global xhdr
global opfile
global sep
global out
global l2exist
global pretty_print
desired_cols = None
aflag = False
xflag = False
hflag = False
vflag = False
i = 1
try:
opts, args = getopt.getopt(
sys.argv[1:],
"axo:hvs:f:p",
[
"all",
"extended",
"outfile",
"help",
"verbose",
"separator",
"columns",
"parsable"
]
)
except getopt.error as msg:
sys.stderr.write("Error: %s\n" % str(msg))
usage()
opts = None
for opt, arg in opts:
if opt in ('-a', '--all'):
aflag = True
if opt in ('-x', '--extended'):
xflag = True
if opt in ('-o', '--outfile'):
opfile = arg
i += 1
if opt in ('-h', '--help'):
hflag = True
if opt in ('-v', '--verbose'):
vflag = True
if opt in ('-s', '--separator'):
sep = arg
i += 1
if opt in ('-f', '--columns'):
desired_cols = arg
i += 1
if opt in ('-p', '--parsable'):
pretty_print = False
i += 1
argv = sys.argv[i:]
sint = int(argv[0]) if argv else sint
count = int(argv[1]) if len(argv) > 1 else (0 if len(argv) > 0 else 1)
if hflag or (xflag and desired_cols):
usage()
if vflag:
detailed_usage()
if xflag:
hdr = xhdr
update_hdr_intr()
# check if L2ARC exists
snap_stats()
l2_size = cur.get("l2_size")
if l2_size:
l2exist = True
if desired_cols:
hdr = desired_cols.split(",")
invalid = []
incompat = []
for ele in hdr:
if ele not in cols:
invalid.append(ele)
elif not l2exist and ele.startswith("l2"):
sys.stdout.write("No L2ARC Here\n%s\n" % ele)
incompat.append(ele)
if len(invalid) > 0:
sys.stderr.write("Invalid column definition! -- %s\n" % invalid)
usage()
if len(incompat) > 0:
sys.stderr.write("Incompatible field specified! -- %s\n" %
incompat)
usage()
if aflag:
if l2exist:
hdr = cols.keys()
else:
hdr = [col for col in cols.keys() if not col.startswith("l2")]
if opfile:
try:
out = open(opfile, "w")
sys.stdout = out
except IOError:
sys.stderr.write("Cannot open %s for writing\n" % opfile)
sys.exit(1)
def calculate():
global d
global v
global l2exist
v = dict()
v["time"] = time.strftime("%H:%M:%S", time.localtime())
v["hits"] = d["hits"] / sint
v["miss"] = d["misses"] / sint
v["read"] = v["hits"] + v["miss"]
v["hit%"] = 100 * v["hits"] / v["read"] if v["read"] > 0 else 0
v["miss%"] = 100 - v["hit%"] if v["read"] > 0 else 0
v["dhit"] = (d["demand_data_hits"] + d["demand_metadata_hits"]) / sint
v["dmis"] = (d["demand_data_misses"] + d["demand_metadata_misses"]) / sint
v["dread"] = v["dhit"] + v["dmis"]
v["dh%"] = 100 * v["dhit"] / v["dread"] if v["dread"] > 0 else 0
v["dm%"] = 100 - v["dh%"] if v["dread"] > 0 else 0
v["phit"] = (d["prefetch_data_hits"] + d["prefetch_metadata_hits"]) / sint
v["pmis"] = (d["prefetch_data_misses"] +
d["prefetch_metadata_misses"]) / sint
v["pread"] = v["phit"] + v["pmis"]
v["ph%"] = 100 * v["phit"] / v["pread"] if v["pread"] > 0 else 0
v["pm%"] = 100 - v["ph%"] if v["pread"] > 0 else 0
v["mhit"] = (d["prefetch_metadata_hits"] +
d["demand_metadata_hits"]) / sint
v["mmis"] = (d["prefetch_metadata_misses"] +
d["demand_metadata_misses"]) / sint
v["mread"] = v["mhit"] + v["mmis"]
v["mh%"] = 100 * v["mhit"] / v["mread"] if v["mread"] > 0 else 0
v["mm%"] = 100 - v["mh%"] if v["mread"] > 0 else 0
v["arcsz"] = cur["size"]
v["size"] = cur["size"]
v["c"] = cur["c"]
v["mfu"] = d["mfu_hits"] / sint
v["mru"] = d["mru_hits"] / sint
v["mrug"] = d["mru_ghost_hits"] / sint
v["mfug"] = d["mfu_ghost_hits"] / sint
v["eskip"] = d["evict_skip"] / sint
v["mtxmis"] = d["mutex_miss"] / sint
if l2exist:
v["l2hits"] = d["l2_hits"] / sint
v["l2miss"] = d["l2_misses"] / sint
v["l2read"] = v["l2hits"] + v["l2miss"]
v["l2hit%"] = 100 * v["l2hits"] / v["l2read"] if v["l2read"] > 0 else 0
v["l2miss%"] = 100 - v["l2hit%"] if v["l2read"] > 0 else 0
v["l2asize"] = cur["l2_asize"]
v["l2size"] = cur["l2_size"]
v["l2bytes"] = d["l2_read_bytes"] / sint
v["grow"] = 0 if cur["arc_no_grow"] else 1
v["need"] = cur["arc_need_free"]
v["free"] = cur["memory_free_bytes"]
v["avail"] = cur["memory_available_bytes"]
v["waste"] = cur["abd_chunk_waste_size"]
def main():
global sint
global count
global hdr_intr
i = 0
count_flag = 0
init()
if count > 0:
count_flag = 1
signal(SIGINT, SIG_DFL)
signal(SIGWINCH, resize_handler)
while True:
if i == 0:
print_header()
snap_stats()
calculate()
print_values()
if count_flag == 1:
if count <= 1:
break
count -= 1
i = 0 if i >= hdr_intr else i + 1
time.sleep(sint)
if out:
out.close()
if __name__ == '__main__':
main()

1
zfs-2.0.0-rc6/cmd/dbufstat/.gitignore vendored Normal file
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dbufstat

5
zfs-2.0.0-rc6/cmd/dbufstat/Makefile.am Normal file
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include $(top_srcdir)/config/Substfiles.am
bin_SCRIPTS = dbufstat
SUBSTFILES += $(bin_SCRIPTS)

684
zfs-2.0.0-rc6/cmd/dbufstat/dbufstat.in Executable file
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#!/usr/bin/env @PYTHON_SHEBANG@
#
# Print out statistics for all cached dmu buffers. This information
# is available through the dbufs kstat and may be post-processed as
# needed by the script.
#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License, Version 1.0 only
# (the "License"). You may not use this file except in compliance
# with the License.
#
# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
# or http://www.opensolaris.org/os/licensing.
# See the License for the specific language governing permissions
# and limitations under the License.
#
# When distributing Covered Code, include this CDDL HEADER in each
# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
# If applicable, add the following below this CDDL HEADER, with the
# fields enclosed by brackets "[]" replaced with your own identifying
# information: Portions Copyright [yyyy] [name of copyright owner]
#
# CDDL HEADER END
#
# Copyright (C) 2013 Lawrence Livermore National Security, LLC.
# Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
#
# This script must remain compatible with Python 2.6+ and Python 3.4+.
#
import sys
import getopt
import errno
import re
bhdr = ["pool", "objset", "object", "level", "blkid", "offset", "dbsize"]
bxhdr = ["pool", "objset", "object", "level", "blkid", "offset", "dbsize",
"meta", "state", "dbholds", "dbc", "list", "atype", "flags",
"count", "asize", "access", "mru", "gmru", "mfu", "gmfu", "l2",
"l2_dattr", "l2_asize", "l2_comp", "aholds", "dtype", "btype",
"data_bs", "meta_bs", "bsize", "lvls", "dholds", "blocks", "dsize"]
bincompat = ["cached", "direct", "indirect", "bonus", "spill"]
dhdr = ["pool", "objset", "object", "dtype", "cached"]
dxhdr = ["pool", "objset", "object", "dtype", "btype", "data_bs", "meta_bs",
"bsize", "lvls", "dholds", "blocks", "dsize", "cached", "direct",
"indirect", "bonus", "spill"]
dincompat = ["level", "blkid", "offset", "dbsize", "meta", "state", "dbholds",
"dbc", "list", "atype", "flags", "count", "asize", "access",
"mru", "gmru", "mfu", "gmfu", "l2", "l2_dattr", "l2_asize",
"l2_comp", "aholds"]
thdr = ["pool", "objset", "dtype", "cached"]
txhdr = ["pool", "objset", "dtype", "cached", "direct", "indirect",
"bonus", "spill"]
tincompat = ["object", "level", "blkid", "offset", "dbsize", "meta", "state",
"dbc", "dbholds", "list", "atype", "flags", "count", "asize",
"access", "mru", "gmru", "mfu", "gmfu", "l2", "l2_dattr",
"l2_asize", "l2_comp", "aholds", "btype", "data_bs", "meta_bs",
"bsize", "lvls", "dholds", "blocks", "dsize"]
cols = {
# hdr: [size, scale, description]
"pool": [15, -1, "pool name"],
"objset": [6, -1, "dataset identification number"],
"object": [10, -1, "object number"],
"level": [5, -1, "indirection level of buffer"],
"blkid": [8, -1, "block number of buffer"],
"offset": [12, 1024, "offset in object of buffer"],
"dbsize": [7, 1024, "size of buffer"],
"meta": [4, -1, "is this buffer metadata?"],
"state": [5, -1, "state of buffer (read, cached, etc)"],
"dbholds": [7, 1000, "number of holds on buffer"],
"dbc": [3, -1, "in dbuf cache"],
"list": [4, -1, "which ARC list contains this buffer"],
"atype": [7, -1, "ARC header type (data or metadata)"],
"flags": [9, -1, "ARC read flags"],
"count": [5, -1, "ARC data count"],
"asize": [7, 1024, "size of this ARC buffer"],
"access": [10, -1, "time this ARC buffer was last accessed"],
"mru": [5, 1000, "hits while on the ARC's MRU list"],
"gmru": [5, 1000, "hits while on the ARC's MRU ghost list"],
"mfu": [5, 1000, "hits while on the ARC's MFU list"],
"gmfu": [5, 1000, "hits while on the ARC's MFU ghost list"],
"l2": [5, 1000, "hits while on the L2ARC"],
"l2_dattr": [8, -1, "L2ARC disk address/offset"],
"l2_asize": [8, 1024, "L2ARC alloc'd size (depending on compression)"],
"l2_comp": [21, -1, "L2ARC compression algorithm for buffer"],
"aholds": [6, 1000, "number of holds on this ARC buffer"],
"dtype": [27, -1, "dnode type"],
"btype": [27, -1, "bonus buffer type"],
"data_bs": [7, 1024, "data block size"],
"meta_bs": [7, 1024, "metadata block size"],
"bsize": [6, 1024, "bonus buffer size"],
"lvls": [6, -1, "number of indirection levels"],
"dholds": [6, 1000, "number of holds on dnode"],
"blocks": [8, 1000, "number of allocated blocks"],
"dsize": [12, 1024, "size of dnode"],
"cached": [6, 1024, "bytes cached for all blocks"],
"direct": [6, 1024, "bytes cached for direct blocks"],
"indirect": [8, 1024, "bytes cached for indirect blocks"],
"bonus": [5, 1024, "bytes cached for bonus buffer"],
"spill": [5, 1024, "bytes cached for spill block"],
}
hdr = None
xhdr = None
sep = " " # Default separator is 2 spaces
cmd = ("Usage: dbufstat [-bdhnrtvx] [-i file] [-f fields] [-o file] "
"[-s string] [-F filter]\n")
raw = 0
if sys.platform.startswith("freebsd"):
import io
# Requires py-sysctl on FreeBSD
import sysctl
def default_ifile():
dbufs = sysctl.filter("kstat.zfs.misc.dbufs")[0].value
sys.stdin = io.StringIO(dbufs)
return "-"
elif sys.platform.startswith("linux"):
def default_ifile():
return "/proc/spl/kstat/zfs/dbufs"
def print_incompat_helper(incompat):
cnt = 0
for key in sorted(incompat):
if cnt is 0:
sys.stderr.write("\t")
elif cnt > 8:
sys.stderr.write(",\n\t")
cnt = 0
else:
sys.stderr.write(", ")
sys.stderr.write("%s" % key)
cnt += 1
sys.stderr.write("\n\n")
def detailed_usage():
sys.stderr.write("%s\n" % cmd)
sys.stderr.write("Field definitions incompatible with '-b' option:\n")
print_incompat_helper(bincompat)
sys.stderr.write("Field definitions incompatible with '-d' option:\n")
print_incompat_helper(dincompat)
sys.stderr.write("Field definitions incompatible with '-t' option:\n")
print_incompat_helper(tincompat)
sys.stderr.write("Field definitions are as follows:\n")
for key in sorted(cols.keys()):
sys.stderr.write("%11s : %s\n" % (key, cols[key][2]))
sys.stderr.write("\n")
sys.exit(0)
def usage():
sys.stderr.write("%s\n" % cmd)
sys.stderr.write("\t -b : Print table of information for each dbuf\n")
sys.stderr.write("\t -d : Print table of information for each dnode\n")
sys.stderr.write("\t -h : Print this help message\n")
sys.stderr.write("\t -n : Exclude header from output\n")
sys.stderr.write("\t -r : Print raw values\n")
sys.stderr.write("\t -t : Print table of information for each dnode type"
"\n")
sys.stderr.write("\t -v : List all possible field headers and definitions"
"\n")
sys.stderr.write("\t -x : Print extended stats\n")
sys.stderr.write("\t -i : Redirect input from the specified file\n")
sys.stderr.write("\t -f : Specify specific fields to print (see -v)\n")
sys.stderr.write("\t -o : Redirect output to the specified file\n")
sys.stderr.write("\t -s : Override default field separator with custom "
"character or string\n")
sys.stderr.write("\t -F : Filter output by value or regex\n")
sys.stderr.write("\nExamples:\n")
sys.stderr.write("\tdbufstat -d -o /tmp/d.log\n")
sys.stderr.write("\tdbufstat -t -s \",\" -o /tmp/t.log\n")
sys.stderr.write("\tdbufstat -v\n")
sys.stderr.write("\tdbufstat -d -f pool,object,objset,dsize,cached\n")
sys.stderr.write("\tdbufstat -bx -F dbc=1,objset=54,pool=testpool\n")
sys.stderr.write("\n")
sys.exit(1)
def prettynum(sz, scale, num=0):
global raw
suffix = [' ', 'K', 'M', 'G', 'T', 'P', 'E', 'Z']
index = 0
save = 0
if raw or scale == -1:
return "%*s" % (sz, num)
# Rounding error, return 0
elif 0 < num < 1:
num = 0
while num > scale and index < 5:
save = num
num = num / scale
index += 1
if index == 0:
return "%*d" % (sz, num)
if (save / scale) < 10:
return "%*.1f%s" % (sz - 1, num, suffix[index])
else:
return "%*d%s" % (sz - 1, num, suffix[index])
def print_values(v):
global hdr
global sep
try:
for col in hdr:
sys.stdout.write("%s%s" % (
prettynum(cols[col][0], cols[col][1], v[col]), sep))
sys.stdout.write("\n")
except IOError as e:
if e.errno == errno.EPIPE:
sys.exit(1)
def print_header():
global hdr
global sep
try:
for col in hdr:
sys.stdout.write("%*s%s" % (cols[col][0], col, sep))
sys.stdout.write("\n")
except IOError as e:
if e.errno == errno.EPIPE:
sys.exit(1)
def get_typestring(t):
ot_strings = [
"DMU_OT_NONE",
# general:
"DMU_OT_OBJECT_DIRECTORY",
"DMU_OT_OBJECT_ARRAY",
"DMU_OT_PACKED_NVLIST",
"DMU_OT_PACKED_NVLIST_SIZE",
"DMU_OT_BPOBJ",
"DMU_OT_BPOBJ_HDR",
# spa:
"DMU_OT_SPACE_MAP_HEADER",
"DMU_OT_SPACE_MAP",
# zil:
"DMU_OT_INTENT_LOG",
# dmu:
"DMU_OT_DNODE",
"DMU_OT_OBJSET",
# dsl:
"DMU_OT_DSL_DIR",
"DMU_OT_DSL_DIR_CHILD_MAP",
"DMU_OT_DSL_DS_SNAP_MAP",
"DMU_OT_DSL_PROPS",
"DMU_OT_DSL_DATASET",
# zpl:
"DMU_OT_ZNODE",
"DMU_OT_OLDACL",
"DMU_OT_PLAIN_FILE_CONTENTS",
"DMU_OT_DIRECTORY_CONTENTS",
"DMU_OT_MASTER_NODE",
"DMU_OT_UNLINKED_SET",
# zvol:
"DMU_OT_ZVOL",
"DMU_OT_ZVOL_PROP",
# other; for testing only!
"DMU_OT_PLAIN_OTHER",
"DMU_OT_UINT64_OTHER",
"DMU_OT_ZAP_OTHER",
# new object types:
"DMU_OT_ERROR_LOG",
"DMU_OT_SPA_HISTORY",
"DMU_OT_SPA_HISTORY_OFFSETS",
"DMU_OT_POOL_PROPS",
"DMU_OT_DSL_PERMS",
"DMU_OT_ACL",
"DMU_OT_SYSACL",
"DMU_OT_FUID",
"DMU_OT_FUID_SIZE",
"DMU_OT_NEXT_CLONES",
"DMU_OT_SCAN_QUEUE",
"DMU_OT_USERGROUP_USED",
"DMU_OT_USERGROUP_QUOTA",
"DMU_OT_USERREFS",
"DMU_OT_DDT_ZAP",
"DMU_OT_DDT_STATS",
"DMU_OT_SA",
"DMU_OT_SA_MASTER_NODE",
"DMU_OT_SA_ATTR_REGISTRATION",
"DMU_OT_SA_ATTR_LAYOUTS",
"DMU_OT_SCAN_XLATE",
"DMU_OT_DEDUP",
"DMU_OT_DEADLIST",
"DMU_OT_DEADLIST_HDR",
"DMU_OT_DSL_CLONES",
"DMU_OT_BPOBJ_SUBOBJ"]
otn_strings = {
0x80: "DMU_OTN_UINT8_DATA",
0xc0: "DMU_OTN_UINT8_METADATA",
0x81: "DMU_OTN_UINT16_DATA",
0xc1: "DMU_OTN_UINT16_METADATA",
0x82: "DMU_OTN_UINT32_DATA",
0xc2: "DMU_OTN_UINT32_METADATA",
0x83: "DMU_OTN_UINT64_DATA",
0xc3: "DMU_OTN_UINT64_METADATA",
0x84: "DMU_OTN_ZAP_DATA",
0xc4: "DMU_OTN_ZAP_METADATA",
0xa0: "DMU_OTN_UINT8_ENC_DATA",
0xe0: "DMU_OTN_UINT8_ENC_METADATA",
0xa1: "DMU_OTN_UINT16_ENC_DATA",
0xe1: "DMU_OTN_UINT16_ENC_METADATA",
0xa2: "DMU_OTN_UINT32_ENC_DATA",
0xe2: "DMU_OTN_UINT32_ENC_METADATA",
0xa3: "DMU_OTN_UINT64_ENC_DATA",
0xe3: "DMU_OTN_UINT64_ENC_METADATA",
0xa4: "DMU_OTN_ZAP_ENC_DATA",
0xe4: "DMU_OTN_ZAP_ENC_METADATA"}
# If "-rr" option is used, don't convert to string representation
if raw > 1:
return "%i" % t
try:
if t < len(ot_strings):
return ot_strings[t]
else:
return otn_strings[t]
except (IndexError, KeyError):
return "(UNKNOWN)"
def get_compstring(c):
comp_strings = ["ZIO_COMPRESS_INHERIT", "ZIO_COMPRESS_ON",
"ZIO_COMPRESS_OFF", "ZIO_COMPRESS_LZJB",
"ZIO_COMPRESS_EMPTY", "ZIO_COMPRESS_GZIP_1",
"ZIO_COMPRESS_GZIP_2", "ZIO_COMPRESS_GZIP_3",
"ZIO_COMPRESS_GZIP_4", "ZIO_COMPRESS_GZIP_5",
"ZIO_COMPRESS_GZIP_6", "ZIO_COMPRESS_GZIP_7",
"ZIO_COMPRESS_GZIP_8", "ZIO_COMPRESS_GZIP_9",
"ZIO_COMPRESS_ZLE", "ZIO_COMPRESS_LZ4",
"ZIO_COMPRESS_ZSTD", "ZIO_COMPRESS_FUNCTION"]
# If "-rr" option is used, don't convert to string representation
if raw > 1:
return "%i" % c
try:
return comp_strings[c]
except IndexError:
return "%i" % c
def parse_line(line, labels):
global hdr
new = dict()
val = None
for col in hdr:
# These are "special" fields computed in the update_dict
# function, prevent KeyError exception on labels[col] for these.
if col not in ['bonus', 'cached', 'direct', 'indirect', 'spill']:
val = line[labels[col]]
if col in ['pool', 'flags']:
new[col] = str(val)
elif col in ['dtype', 'btype']:
new[col] = get_typestring(int(val))
elif col in ['l2_comp']:
new[col] = get_compstring(int(val))
else:
new[col] = int(val)
return new
def update_dict(d, k, line, labels):
pool = line[labels['pool']]
objset = line[labels['objset']]
key = line[labels[k]]
dbsize = int(line[labels['dbsize']])
blkid = int(line[labels['blkid']])
level = int(line[labels['level']])
if pool not in d:
d[pool] = dict()
if objset not in d[pool]:
d[pool][objset] = dict()
if key not in d[pool][objset]:
d[pool][objset][key] = parse_line(line, labels)
d[pool][objset][key]['bonus'] = 0
d[pool][objset][key]['cached'] = 0
d[pool][objset][key]['direct'] = 0
d[pool][objset][key]['indirect'] = 0
d[pool][objset][key]['spill'] = 0
d[pool][objset][key]['cached'] += dbsize
if blkid == -1:
d[pool][objset][key]['bonus'] += dbsize
elif blkid == -2:
d[pool][objset][key]['spill'] += dbsize
else:
if level == 0:
d[pool][objset][key]['direct'] += dbsize
else:
d[pool][objset][key]['indirect'] += dbsize
return d
def skip_line(vals, filters):
'''
Determines if a line should be skipped during printing
based on a set of filters
'''
if len(filters) == 0:
return False
for key in vals:
if key in filters:
val = prettynum(cols[key][0], cols[key][1], vals[key]).strip()
# we want a full match here
if re.match("(?:" + filters[key] + r")\Z", val) is None:
return True
return False
def print_dict(d, filters, noheader):
if not noheader:
print_header()
for pool in list(d.keys()):
for objset in list(d[pool].keys()):
for v in list(d[pool][objset].values()):
if not skip_line(v, filters):
print_values(v)
def dnodes_build_dict(filehandle):
labels = dict()
dnodes = dict()
# First 3 lines are header information, skip the first two
for i in range(2):
next(filehandle)
# The third line contains the labels and index locations
for i, v in enumerate(next(filehandle).split()):
labels[v] = i
# The rest of the file is buffer information
for line in filehandle:
update_dict(dnodes, 'object', line.split(), labels)
return dnodes
def types_build_dict(filehandle):
labels = dict()
types = dict()
# First 3 lines are header information, skip the first two
for i in range(2):
next(filehandle)
# The third line contains the labels and index locations
for i, v in enumerate(next(filehandle).split()):
labels[v] = i
# The rest of the file is buffer information
for line in filehandle:
update_dict(types, 'dtype', line.split(), labels)
return types
def buffers_print_all(filehandle, filters, noheader):
labels = dict()
# First 3 lines are header information, skip the first two
for i in range(2):
next(filehandle)
# The third line contains the labels and index locations
for i, v in enumerate(next(filehandle).split()):
labels[v] = i
if not noheader:
print_header()
# The rest of the file is buffer information
for line in filehandle:
vals = parse_line(line.split(), labels)
if not skip_line(vals, filters):
print_values(vals)
def main():
global hdr
global sep
global raw
desired_cols = None
bflag = False
dflag = False
hflag = False
ifile = None
ofile = None
tflag = False
vflag = False
xflag = False
nflag = False
filters = dict()
try:
opts, args = getopt.getopt(
sys.argv[1:],
"bdf:hi:o:rs:tvxF:n",
[
"buffers",
"dnodes",
"columns",
"help",
"infile",
"outfile",
"separator",
"types",
"verbose",
"extended",
"filter"
]
)
except getopt.error:
usage()
opts = None
for opt, arg in opts:
if opt in ('-b', '--buffers'):
bflag = True
if opt in ('-d', '--dnodes'):
dflag = True
if opt in ('-f', '--columns'):
desired_cols = arg
if opt in ('-h', '--help'):
hflag = True
if opt in ('-i', '--infile'):
ifile = arg
if opt in ('-o', '--outfile'):
ofile = arg
if opt in ('-r', '--raw'):
raw += 1
if opt in ('-s', '--separator'):
sep = arg
if opt in ('-t', '--types'):
tflag = True
if opt in ('-v', '--verbose'):
vflag = True
if opt in ('-x', '--extended'):
xflag = True
if opt in ('-n', '--noheader'):
nflag = True
if opt in ('-F', '--filter'):
fils = [x.strip() for x in arg.split(",")]
for fil in fils:
f = [x.strip() for x in fil.split("=")]
if len(f) != 2:
sys.stderr.write("Invalid filter '%s'.\n" % fil)
sys.exit(1)
if f[0] not in cols:
sys.stderr.write("Invalid field '%s' in filter.\n" % f[0])
sys.exit(1)
if f[0] in filters:
sys.stderr.write("Field '%s' specified multiple times in "
"filter.\n" % f[0])
sys.exit(1)
try:
re.compile("(?:" + f[1] + r")\Z")
except re.error:
sys.stderr.write("Invalid regex for field '%s' in "
"filter.\n" % f[0])
sys.exit(1)
filters[f[0]] = f[1]
if hflag or (xflag and desired_cols):
usage()
if vflag:
detailed_usage()
# Ensure at most only one of b, d, or t flags are set
if (bflag and dflag) or (bflag and tflag) or (dflag and tflag):
usage()
if bflag:
hdr = bxhdr if xflag else bhdr
elif tflag:
hdr = txhdr if xflag else thdr
else: # Even if dflag is False, it's the default if none set
dflag = True
hdr = dxhdr if xflag else dhdr
if desired_cols:
hdr = desired_cols.split(",")
invalid = []
incompat = []
for ele in hdr:
if ele not in cols:
invalid.append(ele)
elif ((bflag and bincompat and ele in bincompat) or
(dflag and dincompat and ele in dincompat) or
(tflag and tincompat and ele in tincompat)):
incompat.append(ele)
if len(invalid) > 0:
sys.stderr.write("Invalid column definition! -- %s\n" % invalid)
usage()
if len(incompat) > 0:
sys.stderr.write("Incompatible field specified! -- %s\n" %
incompat)
usage()
if ofile:
try:
tmp = open(ofile, "w")
sys.stdout = tmp
except IOError:
sys.stderr.write("Cannot open %s for writing\n" % ofile)
sys.exit(1)
if not ifile:
ifile = default_ifile()
if ifile is not "-":
try:
tmp = open(ifile, "r")
sys.stdin = tmp
except IOError:
sys.stderr.write("Cannot open %s for reading\n" % ifile)
sys.exit(1)
if bflag:
buffers_print_all(sys.stdin, filters, nflag)
if dflag:
print_dict(dnodes_build_dict(sys.stdin), filters, nflag)
if tflag:
print_dict(types_build_dict(sys.stdin), filters, nflag)
if __name__ == '__main__':
main()

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dist_sbin_SCRIPTS = fsck.zfs

9
zfs-2.0.0-rc6/cmd/fsck_zfs/fsck.zfs Executable file
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#!/bin/sh
#
# fsck.zfs: A fsck helper to accommodate distributions that expect
# to be able to execute a fsck on all filesystem types. Currently
# this script does nothing but it could be extended to act as a
# compatibility wrapper for 'zpool scrub'.
#
exit 0

1
zfs-2.0.0-rc6/cmd/mount_zfs/.gitignore vendored Normal file
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mount.zfs

20
zfs-2.0.0-rc6/cmd/mount_zfs/Makefile.am Normal file
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include $(top_srcdir)/config/Rules.am
#
# Ignore the prefix for the mount helper. It must be installed in /sbin/
# because this path is hardcoded in the mount(8) for security reasons.
# However, if needed, the configure option --with-mounthelperdir= can be used
# to override the default install location.
#
sbindir=$(mounthelperdir)
sbin_PROGRAMS = mount.zfs
mount_zfs_SOURCES = \
mount_zfs.c
mount_zfs_LDADD = \
$(abs_top_builddir)/lib/libzfs/libzfs.la \
$(abs_top_builddir)/lib/libzfs_core/libzfs_core.la \
$(abs_top_builddir)/lib/libnvpair/libnvpair.la
mount_zfs_LDADD += $(LTLIBINTL)

395
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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2011 Lawrence Livermore National Security, LLC.
*/
#include <libintl.h>
#include <unistd.h>
#include <sys/file.h>
#include <sys/mount.h>
#include <sys/mntent.h>
#include <sys/stat.h>
#include <libzfs.h>
#include <libzutil.h>
#include <locale.h>
#include <getopt.h>
#include <fcntl.h>
#include <errno.h>
#define ZS_COMMENT 0x00000000 /* comment */
#define ZS_ZFSUTIL 0x00000001 /* caller is zfs(8) */
libzfs_handle_t *g_zfs;
/*
* Return the pool/dataset to mount given the name passed to mount. This
* is expected to be of the form pool/dataset, however may also refer to
* a block device if that device contains a valid zfs label.
*/
static void
parse_dataset(const char *target, char **dataset)
{
/*
* We expect a pool/dataset to be provided, however if we're
* given a device which is a member of a zpool we attempt to
* extract the pool name stored in the label. Given the pool
* name we can mount the root dataset.
*/
int fd = open(target, O_RDONLY);
if (fd >= 0) {
nvlist_t *config = NULL;
if (zpool_read_label(fd, &config, NULL) != 0)
config = NULL;
if (close(fd))
perror("close");
if (config) {
char *name = NULL;
if (!nvlist_lookup_string(config,
ZPOOL_CONFIG_POOL_NAME, &name))
(void) strlcpy(*dataset, name, PATH_MAX);
nvlist_free(config);
if (name)
return;
}
}
/*
* If a file or directory in your current working directory is
* named 'dataset' then mount(8) will prepend your current working
* directory to the dataset. There is no way to prevent this
* behavior so we simply check for it and strip the prepended
* patch when it is added.
*/
char cwd[PATH_MAX];
if (getcwd(cwd, PATH_MAX) != NULL) {
int len = strlen(cwd);
/* Do not add one when cwd already ends in a trailing '/' */
if (strncmp(cwd, target, len) == 0)
target += len + (cwd[len-1] != '/');
}
strlcpy(*dataset, target, PATH_MAX);
}
/*
* Update the mtab_* code to use the libmount library when it is commonly
* available otherwise fallback to legacy mode. The mount(8) utility will
* manage the lock file for us to prevent racing updates to /etc/mtab.
*/
static int
mtab_is_writeable(void)
{
struct stat st;
int error, fd;
error = lstat("/etc/mtab", &st);
if (error || S_ISLNK(st.st_mode))
return (0);
fd = open("/etc/mtab", O_RDWR | O_CREAT, 0644);
if (fd < 0)
return (0);
close(fd);
return (1);
}
static int
mtab_update(char *dataset, char *mntpoint, char *type, char *mntopts)
{
struct mntent mnt;
FILE *fp;
int error;
mnt.mnt_fsname = dataset;
mnt.mnt_dir = mntpoint;
mnt.mnt_type = type;
mnt.mnt_opts = mntopts ? mntopts : "";
mnt.mnt_freq = 0;
mnt.mnt_passno = 0;
fp = setmntent("/etc/mtab", "a+");
if (!fp) {
(void) fprintf(stderr, gettext(
"filesystem '%s' was mounted, but /etc/mtab "
"could not be opened due to error %d\n"),
dataset, errno);
return (MOUNT_FILEIO);
}
error = addmntent(fp, &mnt);
if (error) {
(void) fprintf(stderr, gettext(
"filesystem '%s' was mounted, but /etc/mtab "
"could not be updated due to error %d\n"),
dataset, errno);
return (MOUNT_FILEIO);
}
(void) endmntent(fp);
return (MOUNT_SUCCESS);
}
int
main(int argc, char **argv)
{
zfs_handle_t *zhp;
char prop[ZFS_MAXPROPLEN];
uint64_t zfs_version = 0;
char mntopts[MNT_LINE_MAX] = { '\0' };
char badopt[MNT_LINE_MAX] = { '\0' };
char mtabopt[MNT_LINE_MAX] = { '\0' };
char mntpoint[PATH_MAX];
char dataset[PATH_MAX], *pdataset = dataset;
unsigned long mntflags = 0, zfsflags = 0, remount = 0;
int sloppy = 0, fake = 0, verbose = 0, nomtab = 0, zfsutil = 0;
int error, c;
(void) setlocale(LC_ALL, "");
(void) setlocale(LC_NUMERIC, "C");
(void) textdomain(TEXT_DOMAIN);
opterr = 0;
/* check options */
while ((c = getopt_long(argc, argv, "sfnvo:h?", 0, 0)) != -1) {
switch (c) {
case 's':
sloppy = 1;
break;
case 'f':
fake = 1;
break;
case 'n':
nomtab = 1;
break;
case 'v':
verbose++;
break;
case 'o':
(void) strlcpy(mntopts, optarg, sizeof (mntopts));
break;
case 'h':
case '?':
(void) fprintf(stderr, gettext("Invalid option '%c'\n"),
optopt);
(void) fprintf(stderr, gettext("Usage: mount.zfs "
"[-sfnv] [-o options] <dataset> <mountpoint>\n"));
return (MOUNT_USAGE);
}
}
argc -= optind;
argv += optind;
/* check that we only have two arguments */
if (argc != 2) {
if (argc == 0)
(void) fprintf(stderr, gettext("missing dataset "
"argument\n"));
else if (argc == 1)
(void) fprintf(stderr,
gettext("missing mountpoint argument\n"));
else
(void) fprintf(stderr, gettext("too many arguments\n"));
(void) fprintf(stderr, "usage: mount <dataset> <mountpoint>\n");
return (MOUNT_USAGE);
}
parse_dataset(argv[0], &pdataset);
/* canonicalize the mount point */
if (realpath(argv[1], mntpoint) == NULL) {
(void) fprintf(stderr, gettext("filesystem '%s' cannot be "
"mounted at '%s' due to canonicalization error %d.\n"),
dataset, argv[1], errno);
return (MOUNT_SYSERR);
}
/* validate mount options and set mntflags */
error = zfs_parse_mount_options(mntopts, &mntflags, &zfsflags, sloppy,
badopt, mtabopt);
if (error) {
switch (error) {
case ENOMEM:
(void) fprintf(stderr, gettext("filesystem '%s' "
"cannot be mounted due to a memory allocation "
"failure.\n"), dataset);
return (MOUNT_SYSERR);
case ENOENT:
(void) fprintf(stderr, gettext("filesystem '%s' "
"cannot be mounted due to invalid option "
"'%s'.\n"), dataset, badopt);
(void) fprintf(stderr, gettext("Use the '-s' option "
"to ignore the bad mount option.\n"));
return (MOUNT_USAGE);
default:
(void) fprintf(stderr, gettext("filesystem '%s' "
"cannot be mounted due to internal error %d.\n"),
dataset, error);
return (MOUNT_SOFTWARE);
}
}
if (verbose)
(void) fprintf(stdout, gettext("mount.zfs:\n"
" dataset: \"%s\"\n mountpoint: \"%s\"\n"
" mountflags: 0x%lx\n zfsflags: 0x%lx\n"
" mountopts: \"%s\"\n mtabopts: \"%s\"\n"),
dataset, mntpoint, mntflags, zfsflags, mntopts, mtabopt);
if (mntflags & MS_REMOUNT) {
nomtab = 1;
remount = 1;
}
if (zfsflags & ZS_ZFSUTIL)
zfsutil = 1;
if ((g_zfs = libzfs_init()) == NULL) {
(void) fprintf(stderr, "%s\n", libzfs_error_init(errno));
return (MOUNT_SYSERR);
}
/* try to open the dataset to access the mount point */
if ((zhp = zfs_open(g_zfs, dataset,
ZFS_TYPE_FILESYSTEM | ZFS_TYPE_SNAPSHOT)) == NULL) {
(void) fprintf(stderr, gettext("filesystem '%s' cannot be "
"mounted, unable to open the dataset\n"), dataset);
libzfs_fini(g_zfs);
return (MOUNT_USAGE);
}
zfs_adjust_mount_options(zhp, mntpoint, mntopts, mtabopt);
/* treat all snapshots as legacy mount points */
if (zfs_get_type(zhp) == ZFS_TYPE_SNAPSHOT)
(void) strlcpy(prop, ZFS_MOUNTPOINT_LEGACY, ZFS_MAXPROPLEN);
else
(void) zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT, prop,
sizeof (prop), NULL, NULL, 0, B_FALSE);
/*
* Fetch the max supported zfs version in case we get ENOTSUP
* back from the mount command, since we need the zfs handle
* to do so.
*/
zfs_version = zfs_prop_get_int(zhp, ZFS_PROP_VERSION);
if (zfs_version == 0) {
fprintf(stderr, gettext("unable to fetch "
"ZFS version for filesystem '%s'\n"), dataset);
return (MOUNT_SYSERR);
}
zfs_close(zhp);
libzfs_fini(g_zfs);
/*
* Legacy mount points may only be mounted using 'mount', never using
* 'zfs mount'. However, since 'zfs mount' actually invokes 'mount'
* we differentiate the two cases using the 'zfsutil' mount option.
* This mount option should only be supplied by the 'zfs mount' util.
*
* The only exception to the above rule is '-o remount' which is
* always allowed for non-legacy datasets. This is done because when
* using zfs as your root file system both rc.sysinit/umountroot and
* systemd depend on 'mount -o remount <mountpoint>' to work.
*/
if (zfsutil && (strcmp(prop, ZFS_MOUNTPOINT_LEGACY) == 0)) {
(void) fprintf(stderr, gettext(
"filesystem '%s' cannot be mounted using 'zfs mount'.\n"
"Use 'zfs set mountpoint=%s' or 'mount -t zfs %s %s'.\n"
"See zfs(8) for more information.\n"),
dataset, mntpoint, dataset, mntpoint);
return (MOUNT_USAGE);
}
if (!zfsutil && !(remount || fake) &&
strcmp(prop, ZFS_MOUNTPOINT_LEGACY)) {
(void) fprintf(stderr, gettext(
"filesystem '%s' cannot be mounted using 'mount'.\n"
"Use 'zfs set mountpoint=%s' or 'zfs mount %s'.\n"
"See zfs(8) for more information.\n"),
dataset, "legacy", dataset);
return (MOUNT_USAGE);
}
if (!fake) {
error = mount(dataset, mntpoint, MNTTYPE_ZFS,
mntflags, mntopts);
}
if (error) {
switch (errno) {
case ENOENT:
(void) fprintf(stderr, gettext("mount point "
"'%s' does not exist\n"), mntpoint);
return (MOUNT_SYSERR);
case EBUSY:
(void) fprintf(stderr, gettext("filesystem "
"'%s' is already mounted\n"), dataset);
return (MOUNT_BUSY);
case ENOTSUP:
if (zfs_version > ZPL_VERSION) {
(void) fprintf(stderr,
gettext("filesystem '%s' (v%d) is not "
"supported by this implementation of "
"ZFS (max v%d).\n"), dataset,
(int)zfs_version, (int)ZPL_VERSION);
} else {
(void) fprintf(stderr,
gettext("filesystem '%s' mount "
"failed for unknown reason.\n"), dataset);
}
return (MOUNT_SYSERR);
#ifdef MS_MANDLOCK
case EPERM:
if (mntflags & MS_MANDLOCK) {
(void) fprintf(stderr, gettext("filesystem "
"'%s' has the 'nbmand=on' property set, "
"this mount\noption may be disabled in "
"your kernel. Use 'zfs set nbmand=off'\n"
"to disable this option and try to "
"mount the filesystem again.\n"), dataset);
return (MOUNT_SYSERR);
}
/* fallthru */
#endif
default:
(void) fprintf(stderr, gettext("filesystem "
"'%s' can not be mounted: %s\n"), dataset,
strerror(errno));
return (MOUNT_USAGE);
}
}
if (!nomtab && mtab_is_writeable()) {
error = mtab_update(dataset, mntpoint, MNTTYPE_ZFS, mtabopt);
if (error)
return (error);
}
return (MOUNT_SUCCESS);
}

1
zfs-2.0.0-rc6/cmd/raidz_test/.gitignore vendored Normal file
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/raidz_test

20
zfs-2.0.0-rc6/cmd/raidz_test/Makefile.am Normal file
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include $(top_srcdir)/config/Rules.am
# Includes kernel code, generate warnings for large stack frames
AM_CFLAGS += $(FRAME_LARGER_THAN)
# Unconditionally enable ASSERTs
AM_CPPFLAGS += -DDEBUG -UNDEBUG -DZFS_DEBUG
bin_PROGRAMS = raidz_test
raidz_test_SOURCES = \
raidz_test.h \
raidz_test.c \
raidz_bench.c
raidz_test_LDADD = \
$(abs_top_builddir)/lib/libzpool/libzpool.la \
$(abs_top_builddir)/lib/libzfs_core/libzfs_core.la
raidz_test_LDADD += -lm

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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (C) 2016 Gvozden Nešković. All rights reserved.
*/
#include <sys/zfs_context.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <sys/zio.h>
#include <sys/vdev_raidz.h>
#include <sys/vdev_raidz_impl.h>
#include <stdio.h>
#include <sys/time.h>
#include "raidz_test.h"
#define GEN_BENCH_MEMORY (((uint64_t)1ULL)<<32)
#define REC_BENCH_MEMORY (((uint64_t)1ULL)<<29)
#define BENCH_ASHIFT 12
#define MIN_CS_SHIFT BENCH_ASHIFT
#define MAX_CS_SHIFT SPA_MAXBLOCKSHIFT
static zio_t zio_bench;
static raidz_map_t *rm_bench;
static size_t max_data_size = SPA_MAXBLOCKSIZE;
static void
bench_init_raidz_map(void)
{
zio_bench.io_offset = 0;
zio_bench.io_size = max_data_size;
/*
* To permit larger column sizes these have to be done
* allocated using aligned alloc instead of zio_abd_buf_alloc
*/
zio_bench.io_abd = raidz_alloc(max_data_size);
init_zio_abd(&zio_bench);
}
static void
bench_fini_raidz_maps(void)
{
/* tear down golden zio */
raidz_free(zio_bench.io_abd, max_data_size);
bzero(&zio_bench, sizeof (zio_t));
}
static inline void
run_gen_bench_impl(const char *impl)
{
int fn, ncols;
uint64_t ds, iter_cnt, iter, disksize;
hrtime_t start;
double elapsed, d_bw;
/* Benchmark generate functions */
for (fn = 0; fn < RAIDZ_GEN_NUM; fn++) {
for (ds = MIN_CS_SHIFT; ds <= MAX_CS_SHIFT; ds++) {
/* create suitable raidz_map */
ncols = rto_opts.rto_dcols + fn + 1;
zio_bench.io_size = 1ULL << ds;
rm_bench = vdev_raidz_map_alloc(&zio_bench,
BENCH_ASHIFT, ncols, fn+1);
/* estimate iteration count */
iter_cnt = GEN_BENCH_MEMORY;
iter_cnt /= zio_bench.io_size;
start = gethrtime();
for (iter = 0; iter < iter_cnt; iter++)
vdev_raidz_generate_parity(rm_bench);
elapsed = NSEC2SEC((double)(gethrtime() - start));
disksize = (1ULL << ds) / rto_opts.rto_dcols;
d_bw = (double)iter_cnt * (double)disksize;
d_bw /= (1024.0 * 1024.0 * elapsed);
LOG(D_ALL, "%10s, %8s, %zu, %10llu, %lf, %lf, %u\n",
impl,
raidz_gen_name[fn],
rto_opts.rto_dcols,
(1ULL<<ds),
d_bw,
d_bw * (double)(ncols),
(unsigned)iter_cnt);
vdev_raidz_map_free(rm_bench);
}
}
}
static void
run_gen_bench(void)
{
char **impl_name;
LOG(D_INFO, DBLSEP "\nBenchmarking parity generation...\n\n");
LOG(D_ALL, "impl, math, dcols, iosize, disk_bw, total_bw, iter\n");
for (impl_name = (char **)raidz_impl_names; *impl_name != NULL;
impl_name++) {
if (vdev_raidz_impl_set(*impl_name) != 0)
continue;
run_gen_bench_impl(*impl_name);
}
}
static void
run_rec_bench_impl(const char *impl)
{
int fn, ncols, nbad;
uint64_t ds, iter_cnt, iter, disksize;
hrtime_t start;
double elapsed, d_bw;
static const int tgt[7][3] = {
{1, 2, 3}, /* rec_p: bad QR & D[0] */
{0, 2, 3}, /* rec_q: bad PR & D[0] */
{0, 1, 3}, /* rec_r: bad PQ & D[0] */
{2, 3, 4}, /* rec_pq: bad R & D[0][1] */
{1, 3, 4}, /* rec_pr: bad Q & D[0][1] */
{0, 3, 4}, /* rec_qr: bad P & D[0][1] */
{3, 4, 5} /* rec_pqr: bad & D[0][1][2] */
};
for (fn = 0; fn < RAIDZ_REC_NUM; fn++) {
for (ds = MIN_CS_SHIFT; ds <= MAX_CS_SHIFT; ds++) {
/* create suitable raidz_map */
ncols = rto_opts.rto_dcols + PARITY_PQR;
zio_bench.io_size = 1ULL << ds;
/*
* raidz block is too short to test
* the requested method
*/
if (zio_bench.io_size / rto_opts.rto_dcols <
(1ULL << BENCH_ASHIFT))
continue;
rm_bench = vdev_raidz_map_alloc(&zio_bench,
BENCH_ASHIFT, ncols, PARITY_PQR);
/* estimate iteration count */
iter_cnt = (REC_BENCH_MEMORY);
iter_cnt /= zio_bench.io_size;
/* calculate how many bad columns there are */
nbad = MIN(3, raidz_ncols(rm_bench) -
raidz_parity(rm_bench));
start = gethrtime();
for (iter = 0; iter < iter_cnt; iter++)
vdev_raidz_reconstruct(rm_bench, tgt[fn], nbad);
elapsed = NSEC2SEC((double)(gethrtime() - start));
disksize = (1ULL << ds) / rto_opts.rto_dcols;
d_bw = (double)iter_cnt * (double)(disksize);
d_bw /= (1024.0 * 1024.0 * elapsed);
LOG(D_ALL, "%10s, %8s, %zu, %10llu, %lf, %lf, %u\n",
impl,
raidz_rec_name[fn],
rto_opts.rto_dcols,
(1ULL<<ds),
d_bw,
d_bw * (double)ncols,
(unsigned)iter_cnt);
vdev_raidz_map_free(rm_bench);
}
}
}
static void
run_rec_bench(void)
{
char **impl_name;
LOG(D_INFO, DBLSEP "\nBenchmarking data reconstruction...\n\n");
LOG(D_ALL, "impl, math, dcols, iosize, disk_bw, total_bw, iter\n");
for (impl_name = (char **)raidz_impl_names; *impl_name != NULL;
impl_name++) {
if (vdev_raidz_impl_set(*impl_name) != 0)
continue;
run_rec_bench_impl(*impl_name);
}
}
void
run_raidz_benchmark(void)
{
bench_init_raidz_map();
run_gen_bench();
run_rec_bench();
bench_fini_raidz_maps();
}

782
zfs-2.0.0-rc6/cmd/raidz_test/raidz_test.c Normal file
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@ -0,0 +1,782 @@
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (C) 2016 Gvozden Nešković. All rights reserved.
*/
#include <sys/zfs_context.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <sys/zio.h>
#include <umem.h>
#include <sys/vdev_raidz.h>
#include <sys/vdev_raidz_impl.h>
#include <assert.h>
#include <stdio.h>
#include "raidz_test.h"
static int *rand_data;
raidz_test_opts_t rto_opts;
static char gdb[256];
static const char gdb_tmpl[] = "gdb -ex \"set pagination 0\" -p %d";
static void sig_handler(int signo)
{
struct sigaction action;
/*
* Restore default action and re-raise signal so SIGSEGV and
* SIGABRT can trigger a core dump.
*/
action.sa_handler = SIG_DFL;
sigemptyset(&action.sa_mask);
action.sa_flags = 0;
(void) sigaction(signo, &action, NULL);
if (rto_opts.rto_gdb)
if (system(gdb)) { }
raise(signo);
}
static void print_opts(raidz_test_opts_t *opts, boolean_t force)
{
char *verbose;
switch (opts->rto_v) {
case 0:
verbose = "no";
break;
case 1:
verbose = "info";
break;
default:
verbose = "debug";
break;
}
if (force || opts->rto_v >= D_INFO) {
(void) fprintf(stdout, DBLSEP "Running with options:\n"
" (-a) zio ashift : %zu\n"
" (-o) zio offset : 1 << %zu\n"
" (-d) number of raidz data columns : %zu\n"
" (-s) size of DATA : 1 << %zu\n"
" (-S) sweep parameters : %s \n"
" (-v) verbose : %s \n\n",
opts->rto_ashift, /* -a */
ilog2(opts->rto_offset), /* -o */
opts->rto_dcols, /* -d */
ilog2(opts->rto_dsize), /* -s */
opts->rto_sweep ? "yes" : "no", /* -S */
verbose); /* -v */
}
}
static void usage(boolean_t requested)
{
const raidz_test_opts_t *o = &rto_opts_defaults;
FILE *fp = requested ? stdout : stderr;
(void) fprintf(fp, "Usage:\n"
"\t[-a zio ashift (default: %zu)]\n"
"\t[-o zio offset, exponent radix 2 (default: %zu)]\n"
"\t[-d number of raidz data columns (default: %zu)]\n"
"\t[-s zio size, exponent radix 2 (default: %zu)]\n"
"\t[-S parameter sweep (default: %s)]\n"
"\t[-t timeout for parameter sweep test]\n"
"\t[-B benchmark all raidz implementations]\n"
"\t[-v increase verbosity (default: %zu)]\n"
"\t[-h (print help)]\n"
"\t[-T test the test, see if failure would be detected]\n"
"\t[-D debug (attach gdb on SIGSEGV)]\n"
"",
o->rto_ashift, /* -a */
ilog2(o->rto_offset), /* -o */
o->rto_dcols, /* -d */
ilog2(o->rto_dsize), /* -s */
rto_opts.rto_sweep ? "yes" : "no", /* -S */
o->rto_v); /* -d */
exit(requested ? 0 : 1);
}
static void process_options(int argc, char **argv)
{
size_t value;
int opt;
raidz_test_opts_t *o = &rto_opts;
bcopy(&rto_opts_defaults, o, sizeof (*o));
while ((opt = getopt(argc, argv, "TDBSvha:o:d:s:t:")) != -1) {
value = 0;
switch (opt) {
case 'a':
value = strtoull(optarg, NULL, 0);
o->rto_ashift = MIN(13, MAX(9, value));
break;
case 'o':
value = strtoull(optarg, NULL, 0);
o->rto_offset = ((1ULL << MIN(12, value)) >> 9) << 9;
break;
case 'd':
value = strtoull(optarg, NULL, 0);
o->rto_dcols = MIN(255, MAX(1, value));
break;
case 's':
value = strtoull(optarg, NULL, 0);
o->rto_dsize = 1ULL << MIN(SPA_MAXBLOCKSHIFT,
MAX(SPA_MINBLOCKSHIFT, value));
break;
case 't':
value = strtoull(optarg, NULL, 0);
o->rto_sweep_timeout = value;
break;
case 'v':
o->rto_v++;
break;
case 'S':
o->rto_sweep = 1;
break;
case 'B':
o->rto_benchmark = 1;
break;
case 'D':
o->rto_gdb = 1;
break;
case 'T':
o->rto_sanity = 1;
break;
case 'h':
usage(B_TRUE);
break;
case '?':
default:
usage(B_FALSE);
break;
}
}
}
#define DATA_COL(rm, i) ((rm)->rm_col[raidz_parity(rm) + (i)].rc_abd)
#define DATA_COL_SIZE(rm, i) ((rm)->rm_col[raidz_parity(rm) + (i)].rc_size)
#define CODE_COL(rm, i) ((rm)->rm_col[(i)].rc_abd)
#define CODE_COL_SIZE(rm, i) ((rm)->rm_col[(i)].rc_size)
static int
cmp_code(raidz_test_opts_t *opts, const raidz_map_t *rm, const int parity)
{
int i, ret = 0;
VERIFY(parity >= 1 && parity <= 3);
for (i = 0; i < parity; i++) {
if (abd_cmp(CODE_COL(rm, i), CODE_COL(opts->rm_golden, i))
!= 0) {
ret++;
LOG_OPT(D_DEBUG, opts,
"\nParity block [%d] different!\n", i);
}
}
return (ret);
}
static int
cmp_data(raidz_test_opts_t *opts, raidz_map_t *rm)
{
int i, ret = 0;
int dcols = opts->rm_golden->rm_cols - raidz_parity(opts->rm_golden);
for (i = 0; i < dcols; i++) {
if (abd_cmp(DATA_COL(opts->rm_golden, i), DATA_COL(rm, i))
!= 0) {
ret++;
LOG_OPT(D_DEBUG, opts,
"\nData block [%d] different!\n", i);
}
}
return (ret);
}
static int
init_rand(void *data, size_t size, void *private)
{
int i;
int *dst = (int *)data;
for (i = 0; i < size / sizeof (int); i++)
dst[i] = rand_data[i];
return (0);
}
static void
corrupt_colums(raidz_map_t *rm, const int *tgts, const int cnt)
{
int i;
raidz_col_t *col;
for (i = 0; i < cnt; i++) {
col = &rm->rm_col[tgts[i]];
abd_iterate_func(col->rc_abd, 0, col->rc_size, init_rand, NULL);
}
}
void
init_zio_abd(zio_t *zio)
{
abd_iterate_func(zio->io_abd, 0, zio->io_size, init_rand, NULL);
}
static void
fini_raidz_map(zio_t **zio, raidz_map_t **rm)
{
vdev_raidz_map_free(*rm);
raidz_free((*zio)->io_abd, (*zio)->io_size);
umem_free(*zio, sizeof (zio_t));
*zio = NULL;
*rm = NULL;
}
static int
init_raidz_golden_map(raidz_test_opts_t *opts, const int parity)
{
int err = 0;
zio_t *zio_test;
raidz_map_t *rm_test;
const size_t total_ncols = opts->rto_dcols + parity;
if (opts->rm_golden) {
fini_raidz_map(&opts->zio_golden, &opts->rm_golden);
}
opts->zio_golden = umem_zalloc(sizeof (zio_t), UMEM_NOFAIL);
zio_test = umem_zalloc(sizeof (zio_t), UMEM_NOFAIL);
opts->zio_golden->io_offset = zio_test->io_offset = opts->rto_offset;
opts->zio_golden->io_size = zio_test->io_size = opts->rto_dsize;
opts->zio_golden->io_abd = raidz_alloc(opts->rto_dsize);
zio_test->io_abd = raidz_alloc(opts->rto_dsize);
init_zio_abd(opts->zio_golden);
init_zio_abd(zio_test);
VERIFY0(vdev_raidz_impl_set("original"));
opts->rm_golden = vdev_raidz_map_alloc(opts->zio_golden,
opts->rto_ashift, total_ncols, parity);
rm_test = vdev_raidz_map_alloc(zio_test,
opts->rto_ashift, total_ncols, parity);
VERIFY(opts->zio_golden);
VERIFY(opts->rm_golden);
vdev_raidz_generate_parity(opts->rm_golden);
vdev_raidz_generate_parity(rm_test);
/* sanity check */
err |= cmp_data(opts, rm_test);
err |= cmp_code(opts, rm_test, parity);
if (err)
ERR("initializing the golden copy ... [FAIL]!\n");
/* tear down raidz_map of test zio */
fini_raidz_map(&zio_test, &rm_test);
return (err);
}
static raidz_map_t *
init_raidz_map(raidz_test_opts_t *opts, zio_t **zio, const int parity)
{
raidz_map_t *rm = NULL;
const size_t alloc_dsize = opts->rto_dsize;
const size_t total_ncols = opts->rto_dcols + parity;
const int ccols[] = { 0, 1, 2 };
VERIFY(zio);
VERIFY(parity <= 3 && parity >= 1);
*zio = umem_zalloc(sizeof (zio_t), UMEM_NOFAIL);
(*zio)->io_offset = 0;
(*zio)->io_size = alloc_dsize;
(*zio)->io_abd = raidz_alloc(alloc_dsize);
init_zio_abd(*zio);
rm = vdev_raidz_map_alloc(*zio, opts->rto_ashift,
total_ncols, parity);
VERIFY(rm);
/* Make sure code columns are destroyed */
corrupt_colums(rm, ccols, parity);
return (rm);
}
static int
run_gen_check(raidz_test_opts_t *opts)
{
char **impl_name;
int fn, err = 0;
zio_t *zio_test;
raidz_map_t *rm_test;
err = init_raidz_golden_map(opts, PARITY_PQR);
if (0 != err)
return (err);
LOG(D_INFO, DBLSEP);
LOG(D_INFO, "Testing parity generation...\n");
for (impl_name = (char **)raidz_impl_names+1; *impl_name != NULL;
impl_name++) {
LOG(D_INFO, SEP);
LOG(D_INFO, "\tTesting [%s] implementation...", *impl_name);
if (0 != vdev_raidz_impl_set(*impl_name)) {
LOG(D_INFO, "[SKIP]\n");
continue;
} else {
LOG(D_INFO, "[SUPPORTED]\n");
}
for (fn = 0; fn < RAIDZ_GEN_NUM; fn++) {
/* Check if should stop */
if (rto_opts.rto_should_stop)
return (err);
/* create suitable raidz_map */
rm_test = init_raidz_map(opts, &zio_test, fn+1);
VERIFY(rm_test);
LOG(D_INFO, "\t\tTesting method [%s] ...",
raidz_gen_name[fn]);
if (!opts->rto_sanity)
vdev_raidz_generate_parity(rm_test);
if (cmp_code(opts, rm_test, fn+1) != 0) {
LOG(D_INFO, "[FAIL]\n");
err++;
} else
LOG(D_INFO, "[PASS]\n");
fini_raidz_map(&zio_test, &rm_test);
}
}
fini_raidz_map(&opts->zio_golden, &opts->rm_golden);
return (err);
}
static int
run_rec_check_impl(raidz_test_opts_t *opts, raidz_map_t *rm, const int fn)
{
int x0, x1, x2;
int tgtidx[3];
int err = 0;
static const int rec_tgts[7][3] = {
{1, 2, 3}, /* rec_p: bad QR & D[0] */
{0, 2, 3}, /* rec_q: bad PR & D[0] */
{0, 1, 3}, /* rec_r: bad PQ & D[0] */
{2, 3, 4}, /* rec_pq: bad R & D[0][1] */
{1, 3, 4}, /* rec_pr: bad Q & D[0][1] */
{0, 3, 4}, /* rec_qr: bad P & D[0][1] */
{3, 4, 5} /* rec_pqr: bad & D[0][1][2] */
};
memcpy(tgtidx, rec_tgts[fn], sizeof (tgtidx));
if (fn < RAIDZ_REC_PQ) {
/* can reconstruct 1 failed data disk */
for (x0 = 0; x0 < opts->rto_dcols; x0++) {
if (x0 >= rm->rm_cols - raidz_parity(rm))
continue;
/* Check if should stop */
if (rto_opts.rto_should_stop)
return (err);
LOG(D_DEBUG, "[%d] ", x0);
tgtidx[2] = x0 + raidz_parity(rm);
corrupt_colums(rm, tgtidx+2, 1);
if (!opts->rto_sanity)
vdev_raidz_reconstruct(rm, tgtidx, 3);
if (cmp_data(opts, rm) != 0) {
err++;
LOG(D_DEBUG, "\nREC D[%d]... [FAIL]\n", x0);
}
}
} else if (fn < RAIDZ_REC_PQR) {
/* can reconstruct 2 failed data disk */
for (x0 = 0; x0 < opts->rto_dcols; x0++) {
if (x0 >= rm->rm_cols - raidz_parity(rm))
continue;
for (x1 = x0 + 1; x1 < opts->rto_dcols; x1++) {
if (x1 >= rm->rm_cols - raidz_parity(rm))
continue;
/* Check if should stop */
if (rto_opts.rto_should_stop)
return (err);
LOG(D_DEBUG, "[%d %d] ", x0, x1);
tgtidx[1] = x0 + raidz_parity(rm);
tgtidx[2] = x1 + raidz_parity(rm);
corrupt_colums(rm, tgtidx+1, 2);
if (!opts->rto_sanity)
vdev_raidz_reconstruct(rm, tgtidx, 3);
if (cmp_data(opts, rm) != 0) {
err++;
LOG(D_DEBUG, "\nREC D[%d %d]... "
"[FAIL]\n", x0, x1);
}
}
}
} else {
/* can reconstruct 3 failed data disk */
for (x0 = 0; x0 < opts->rto_dcols; x0++) {
if (x0 >= rm->rm_cols - raidz_parity(rm))
continue;
for (x1 = x0 + 1; x1 < opts->rto_dcols; x1++) {
if (x1 >= rm->rm_cols - raidz_parity(rm))
continue;
for (x2 = x1 + 1; x2 < opts->rto_dcols; x2++) {
if (x2 >=
rm->rm_cols - raidz_parity(rm))
continue;
/* Check if should stop */
if (rto_opts.rto_should_stop)
return (err);
LOG(D_DEBUG, "[%d %d %d]", x0, x1, x2);
tgtidx[0] = x0 + raidz_parity(rm);
tgtidx[1] = x1 + raidz_parity(rm);
tgtidx[2] = x2 + raidz_parity(rm);
corrupt_colums(rm, tgtidx, 3);
if (!opts->rto_sanity)
vdev_raidz_reconstruct(rm,
tgtidx, 3);
if (cmp_data(opts, rm) != 0) {
err++;
LOG(D_DEBUG,
"\nREC D[%d %d %d]... "
"[FAIL]\n", x0, x1, x2);
}
}
}
}
}
return (err);
}
static int
run_rec_check(raidz_test_opts_t *opts)
{
char **impl_name;
unsigned fn, err = 0;
zio_t *zio_test;
raidz_map_t *rm_test;
err = init_raidz_golden_map(opts, PARITY_PQR);
if (0 != err)
return (err);
LOG(D_INFO, DBLSEP);
LOG(D_INFO, "Testing data reconstruction...\n");
for (impl_name = (char **)raidz_impl_names+1; *impl_name != NULL;
impl_name++) {
LOG(D_INFO, SEP);
LOG(D_INFO, "\tTesting [%s] implementation...", *impl_name);
if (vdev_raidz_impl_set(*impl_name) != 0) {
LOG(D_INFO, "[SKIP]\n");
continue;
} else
LOG(D_INFO, "[SUPPORTED]\n");
/* create suitable raidz_map */
rm_test = init_raidz_map(opts, &zio_test, PARITY_PQR);
/* generate parity */
vdev_raidz_generate_parity(rm_test);
for (fn = 0; fn < RAIDZ_REC_NUM; fn++) {
LOG(D_INFO, "\t\tTesting method [%s] ...",
raidz_rec_name[fn]);
if (run_rec_check_impl(opts, rm_test, fn) != 0) {
LOG(D_INFO, "[FAIL]\n");
err++;
} else
LOG(D_INFO, "[PASS]\n");
}
/* tear down test raidz_map */
fini_raidz_map(&zio_test, &rm_test);
}
fini_raidz_map(&opts->zio_golden, &opts->rm_golden);
return (err);
}
static int
run_test(raidz_test_opts_t *opts)
{
int err = 0;
if (opts == NULL)
opts = &rto_opts;
print_opts(opts, B_FALSE);
err |= run_gen_check(opts);
err |= run_rec_check(opts);
return (err);
}
#define SWEEP_RUNNING 0
#define SWEEP_FINISHED 1
#define SWEEP_ERROR 2
#define SWEEP_TIMEOUT 3
static int sweep_state = 0;
static raidz_test_opts_t failed_opts;
static kmutex_t sem_mtx;
static kcondvar_t sem_cv;
static int max_free_slots;
static int free_slots;
static void
sweep_thread(void *arg)
{
int err = 0;
raidz_test_opts_t *opts = (raidz_test_opts_t *)arg;
VERIFY(opts != NULL);
err = run_test(opts);
if (rto_opts.rto_sanity) {
/* 25% chance that a sweep test fails */
if (rand() < (RAND_MAX/4))
err = 1;
}
if (0 != err) {
mutex_enter(&sem_mtx);
memcpy(&failed_opts, opts, sizeof (raidz_test_opts_t));
sweep_state = SWEEP_ERROR;
mutex_exit(&sem_mtx);
}
umem_free(opts, sizeof (raidz_test_opts_t));
/* signal the next thread */
mutex_enter(&sem_mtx);
free_slots++;
cv_signal(&sem_cv);
mutex_exit(&sem_mtx);
thread_exit();
}
static int
run_sweep(void)
{
static const size_t dcols_v[] = { 1, 2, 3, 4, 5, 6, 7, 8, 12, 15, 16 };
static const size_t ashift_v[] = { 9, 12, 14 };
static const size_t size_v[] = { 1 << 9, 21 * (1 << 9), 13 * (1 << 12),
1 << 17, (1 << 20) - (1 << 12), SPA_MAXBLOCKSIZE };
(void) setvbuf(stdout, NULL, _IONBF, 0);
ulong_t total_comb = ARRAY_SIZE(size_v) * ARRAY_SIZE(ashift_v) *
ARRAY_SIZE(dcols_v);
ulong_t tried_comb = 0;
hrtime_t time_diff, start_time = gethrtime();
raidz_test_opts_t *opts;
int a, d, s;
max_free_slots = free_slots = MAX(2, boot_ncpus);
mutex_init(&sem_mtx, NULL, MUTEX_DEFAULT, NULL);
cv_init(&sem_cv, NULL, CV_DEFAULT, NULL);
for (s = 0; s < ARRAY_SIZE(size_v); s++)
for (a = 0; a < ARRAY_SIZE(ashift_v); a++)
for (d = 0; d < ARRAY_SIZE(dcols_v); d++) {
if (size_v[s] < (1 << ashift_v[a])) {
total_comb--;
continue;
}
if (++tried_comb % 20 == 0)
LOG(D_ALL, "%lu/%lu... ", tried_comb, total_comb);
/* wait for signal to start new thread */
mutex_enter(&sem_mtx);
while (cv_timedwait_sig(&sem_cv, &sem_mtx,
ddi_get_lbolt() + hz)) {
/* check if should stop the test (timeout) */
time_diff = (gethrtime() - start_time) / NANOSEC;
if (rto_opts.rto_sweep_timeout > 0 &&
time_diff >= rto_opts.rto_sweep_timeout) {
sweep_state = SWEEP_TIMEOUT;
rto_opts.rto_should_stop = B_TRUE;
mutex_exit(&sem_mtx);
goto exit;
}
/* check if should stop the test (error) */
if (sweep_state != SWEEP_RUNNING) {
mutex_exit(&sem_mtx);
goto exit;
}
/* exit loop if a slot is available */
if (free_slots > 0) {
break;
}
}
free_slots--;
mutex_exit(&sem_mtx);
opts = umem_zalloc(sizeof (raidz_test_opts_t), UMEM_NOFAIL);
opts->rto_ashift = ashift_v[a];
opts->rto_dcols = dcols_v[d];
opts->rto_offset = (1 << ashift_v[a]) * rand();
opts->rto_dsize = size_v[s];
opts->rto_v = 0; /* be quiet */
VERIFY3P(thread_create(NULL, 0, sweep_thread, (void *) opts,
0, NULL, TS_RUN, defclsyspri), !=, NULL);
}
exit:
LOG(D_ALL, "\nWaiting for test threads to finish...\n");
mutex_enter(&sem_mtx);
VERIFY(free_slots <= max_free_slots);
while (free_slots < max_free_slots) {
(void) cv_wait(&sem_cv, &sem_mtx);
}
mutex_exit(&sem_mtx);
if (sweep_state == SWEEP_ERROR) {
ERR("Sweep test failed! Failed option: \n");
print_opts(&failed_opts, B_TRUE);
} else {
if (sweep_state == SWEEP_TIMEOUT)
LOG(D_ALL, "Test timeout (%lus). Stopping...\n",
(ulong_t)rto_opts.rto_sweep_timeout);
LOG(D_ALL, "Sweep test succeeded on %lu raidz maps!\n",
(ulong_t)tried_comb);
}
mutex_destroy(&sem_mtx);
return (sweep_state == SWEEP_ERROR ? SWEEP_ERROR : 0);
}
int
main(int argc, char **argv)
{
size_t i;
struct sigaction action;
int err = 0;
/* init gdb string early */
(void) sprintf(gdb, gdb_tmpl, getpid());
action.sa_handler = sig_handler;
sigemptyset(&action.sa_mask);
action.sa_flags = 0;
if (sigaction(SIGSEGV, &action, NULL) < 0) {
ERR("raidz_test: cannot catch SIGSEGV: %s.\n", strerror(errno));
exit(EXIT_FAILURE);
}
(void) setvbuf(stdout, NULL, _IOLBF, 0);
dprintf_setup(&argc, argv);
process_options(argc, argv);
kernel_init(SPA_MODE_READ);
/* setup random data because rand() is not reentrant */
rand_data = (int *)umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
srand((unsigned)time(NULL) * getpid());
for (i = 0; i < SPA_MAXBLOCKSIZE / sizeof (int); i++)
rand_data[i] = rand();
mprotect(rand_data, SPA_MAXBLOCKSIZE, PROT_READ);
if (rto_opts.rto_benchmark) {
run_raidz_benchmark();
} else if (rto_opts.rto_sweep) {
err = run_sweep();
} else {
err = run_test(NULL);
}
umem_free(rand_data, SPA_MAXBLOCKSIZE);
kernel_fini();
return (err);
}

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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (C) 2016 Gvozden Nešković. All rights reserved.
*/
#ifndef RAIDZ_TEST_H
#define RAIDZ_TEST_H
#include <sys/spa.h>
static const char *raidz_impl_names[] = {
"original",
"scalar",
"sse2",
"ssse3",
"avx2",
"avx512f",
"avx512bw",
"aarch64_neon",
"aarch64_neonx2",
"powerpc_altivec",
NULL
};
typedef struct raidz_test_opts {
size_t rto_ashift;
size_t rto_offset;
size_t rto_dcols;
size_t rto_dsize;
size_t rto_v;
size_t rto_sweep;
size_t rto_sweep_timeout;
size_t rto_benchmark;
size_t rto_sanity;
size_t rto_gdb;
/* non-user options */
boolean_t rto_should_stop;
zio_t *zio_golden;
raidz_map_t *rm_golden;
} raidz_test_opts_t;
static const raidz_test_opts_t rto_opts_defaults = {
.rto_ashift = 9,
.rto_offset = 1ULL << 0,
.rto_dcols = 8,
.rto_dsize = 1<<19,
.rto_v = 0,
.rto_sweep = 0,
.rto_benchmark = 0,
.rto_sanity = 0,
.rto_gdb = 0,
.rto_should_stop = B_FALSE
};
extern raidz_test_opts_t rto_opts;
static inline size_t ilog2(size_t a)
{
return (a > 1 ? 1 + ilog2(a >> 1) : 0);
}
#define D_ALL 0
#define D_INFO 1
#define D_DEBUG 2
#define LOG(lvl, a...) \
{ \
if (rto_opts.rto_v >= lvl) \
(void) fprintf(stdout, a); \
} \
#define LOG_OPT(lvl, opt, a...) \
{ \
if (opt->rto_v >= lvl) \
(void) fprintf(stdout, a); \
} \
#define ERR(a...) (void) fprintf(stderr, a)
#define DBLSEP "================\n"
#define SEP "----------------\n"
#define raidz_alloc(size) abd_alloc(size, B_FALSE)
#define raidz_free(p, size) abd_free(p)
void init_zio_abd(zio_t *zio);
void run_raidz_benchmark(void);
#endif /* RAIDZ_TEST_H */

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dist_udev_SCRIPTS = vdev_id

605
zfs-2.0.0-rc6/cmd/vdev_id/vdev_id Executable file
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#!/bin/sh
#
# vdev_id: udev helper to generate user-friendly names for JBOD disks
#
# This script parses the file /etc/zfs/vdev_id.conf to map a
# physical path in a storage topology to a channel name. The
# channel name is combined with a disk enclosure slot number to
# create an alias that reflects the physical location of the drive.
# This is particularly helpful when it comes to tasks like replacing
# failed drives. Slot numbers may also be re-mapped in case the
# default numbering is unsatisfactory. The drive aliases will be
# created as symbolic links in /dev/disk/by-vdev.
#
# The currently supported topologies are sas_direct and sas_switch.
# A multipath mode is supported in which dm-mpath devices are
# handled by examining the first-listed running component disk. In
# multipath mode the configuration file should contain a channel
# definition with the same name for each path to a given enclosure.
#
# The alias keyword provides a simple way to map already-existing
# device symlinks to more convenient names. It is suitable for
# small, static configurations or for sites that have some automated
# way to generate the mapping file.
#
#
# Some example configuration files are given below.
# #
# # Example vdev_id.conf - sas_direct.
# #
#
# multipath no
# topology sas_direct
# phys_per_port 4
# slot bay
#
# # PCI_ID HBA PORT CHANNEL NAME
# channel 85:00.0 1 A
# channel 85:00.0 0 B
# channel 86:00.0 1 C
# channel 86:00.0 0 D
#
# # Custom mapping for Channel A
#
# # Linux Mapped
# # Slot Slot Channel
# slot 1 7 A
# slot 2 10 A
# slot 3 3 A
# slot 4 6 A
#
# # Default mapping for B, C, and D
# slot 1 4
# slot 2 2
# slot 3 1
# slot 4 3
# #
# # Example vdev_id.conf - sas_switch
# #
#
# topology sas_switch
#
# # SWITCH PORT CHANNEL NAME
# channel 1 A
# channel 2 B
# channel 3 C
# channel 4 D
# #
# # Example vdev_id.conf - multipath
# #
#
# multipath yes
#
# # PCI_ID HBA PORT CHANNEL NAME
# channel 85:00.0 1 A
# channel 85:00.0 0 B
# channel 86:00.0 1 A
# channel 86:00.0 0 B
# #
# # Example vdev_id.conf - alias
# #
#
# # by-vdev
# # name fully qualified or base name of device link
# alias d1 /dev/disk/by-id/wwn-0x5000c5002de3b9ca
# alias d2 wwn-0x5000c5002def789e
PATH=/bin:/sbin:/usr/bin:/usr/sbin
CONFIG=/etc/zfs/vdev_id.conf
PHYS_PER_PORT=
DEV=
MULTIPATH=
TOPOLOGY=
BAY=
usage() {
cat << EOF
Usage: vdev_id [-h]
vdev_id <-d device> [-c config_file] [-p phys_per_port]
[-g sas_direct|sas_switch|scsi] [-m]
-c specify name of an alternative config file [default=$CONFIG]
-d specify basename of device (i.e. sda)
-e Create enclose device symlinks only (/dev/by-enclosure)
-g Storage network topology [default="$TOPOLOGY"]
-m Run in multipath mode
-p number of phy's per switch port [default=$PHYS_PER_PORT]
-h show this summary
EOF
exit 0
}
map_slot() {
LINUX_SLOT=$1
CHANNEL=$2
MAPPED_SLOT=`awk "\\$1 == \"slot\" && \\$2 == ${LINUX_SLOT} && \
\\$4 ~ /^${CHANNEL}$|^$/ { print \\$3; exit }" $CONFIG`
if [ -z "$MAPPED_SLOT" ] ; then
MAPPED_SLOT=$LINUX_SLOT
fi
printf "%d" ${MAPPED_SLOT}
}
map_channel() {
MAPPED_CHAN=
PCI_ID=$1
PORT=$2
case $TOPOLOGY in
"sas_switch")
MAPPED_CHAN=`awk "\\$1 == \"channel\" && \\$2 == ${PORT} \
{ print \\$3; exit }" $CONFIG`
;;
"sas_direct"|"scsi")
MAPPED_CHAN=`awk "\\$1 == \"channel\" && \
\\$2 == \"${PCI_ID}\" && \\$3 == ${PORT} \
{ print \\$4; exit }" $CONFIG`
;;
esac
printf "%s" ${MAPPED_CHAN}
}
sas_handler() {
if [ -z "$PHYS_PER_PORT" ] ; then
PHYS_PER_PORT=`awk "\\$1 == \"phys_per_port\" \
{print \\$2; exit}" $CONFIG`
fi
PHYS_PER_PORT=${PHYS_PER_PORT:-4}
if ! echo $PHYS_PER_PORT | grep -q -E '^[0-9]+$' ; then
echo "Error: phys_per_port value $PHYS_PER_PORT is non-numeric"
exit 1
fi
if [ -z "$MULTIPATH_MODE" ] ; then
MULTIPATH_MODE=`awk "\\$1 == \"multipath\" \
{print \\$2; exit}" $CONFIG`
fi
# Use first running component device if we're handling a dm-mpath device
if [ "$MULTIPATH_MODE" = "yes" ] ; then
# If udev didn't tell us the UUID via DM_NAME, check /dev/mapper
if [ -z "$DM_NAME" ] ; then
DM_NAME=`ls -l --full-time /dev/mapper |
awk "/\/$DEV$/{print \\$9}"`
fi
# For raw disks udev exports DEVTYPE=partition when
# handling partitions, and the rules can be written to
# take advantage of this to append a -part suffix. For
# dm devices we get DEVTYPE=disk even for partitions so
# we have to append the -part suffix directly in the
# helper.
if [ "$DEVTYPE" != "partition" ] ; then
PART=`echo $DM_NAME | awk -Fp '/p/{print "-part"$2}'`
fi
# Strip off partition information.
DM_NAME=`echo $DM_NAME | sed 's/p[0-9][0-9]*$//'`
if [ -z "$DM_NAME" ] ; then
return
fi
# Get the raw scsi device name from multipath -ll. Strip off
# leading pipe symbols to make field numbering consistent.
DEV=`multipath -ll $DM_NAME |
awk '/running/{gsub("^[|]"," "); print $3 ; exit}'`
if [ -z "$DEV" ] ; then
return
fi
fi
if echo $DEV | grep -q ^/devices/ ; then
sys_path=$DEV
else
sys_path=`udevadm info -q path -p /sys/block/$DEV 2>/dev/null`
fi
# Use positional parameters as an ad-hoc array
set -- $(echo "$sys_path" | tr / ' ')
num_dirs=$#
scsi_host_dir="/sys"
# Get path up to /sys/.../hostX
i=1
while [ $i -le $num_dirs ] ; do
d=$(eval echo \${$i})
scsi_host_dir="$scsi_host_dir/$d"
echo $d | grep -q -E '^host[0-9]+$' && break
i=$(($i + 1))
done
if [ $i = $num_dirs ] ; then
return
fi
PCI_ID=$(eval echo \${$(($i -1))} | awk -F: '{print $2":"$3}')
# In sas_switch mode, the directory four levels beneath
# /sys/.../hostX contains symlinks to phy devices that reveal
# the switch port number. In sas_direct mode, the phy links one
# directory down reveal the HBA port.
port_dir=$scsi_host_dir
case $TOPOLOGY in
"sas_switch") j=$(($i + 4)) ;;
"sas_direct") j=$(($i + 1)) ;;
esac
i=$(($i + 1))
while [ $i -le $j ] ; do
port_dir="$port_dir/$(eval echo \${$i})"
i=$(($i + 1))
done
PHY=`ls -d $port_dir/phy* 2>/dev/null | head -1 | awk -F: '{print $NF}'`
if [ -z "$PHY" ] ; then
PHY=0
fi
PORT=$(( $PHY / $PHYS_PER_PORT ))
# Look in /sys/.../sas_device/end_device-X for the bay_identifier
# attribute.
end_device_dir=$port_dir
while [ $i -lt $num_dirs ] ; do
d=$(eval echo \${$i})
end_device_dir="$end_device_dir/$d"
if echo $d | grep -q '^end_device' ; then
end_device_dir="$end_device_dir/sas_device/$d"
break
fi
i=$(($i + 1))
done
SLOT=
case $BAY in
"bay")
SLOT=`cat $end_device_dir/bay_identifier 2>/dev/null`
;;
"phy")
SLOT=`cat $end_device_dir/phy_identifier 2>/dev/null`
;;
"port")
d=$(eval echo \${$i})
SLOT=`echo $d | sed -e 's/^.*://'`
;;
"id")
i=$(($i + 1))
d=$(eval echo \${$i})
SLOT=`echo $d | sed -e 's/^.*://'`
;;
"lun")
i=$(($i + 2))
d=$(eval echo \${$i})
SLOT=`echo $d | sed -e 's/^.*://'`
;;
"ses")
# look for this SAS path in all SCSI Enclosure Services
# (SES) enclosures
sas_address=`cat $end_device_dir/sas_address 2>/dev/null`
enclosures=`lsscsi -g | \
sed -n -e '/enclosu/s/^.* \([^ ][^ ]*\) *$/\1/p'`
for enclosure in $enclosures; do
set -- $(sg_ses -p aes $enclosure | \
awk "/device slot number:/{slot=\$12} \
/SAS address: $sas_address/\
{print slot}")
SLOT=$1
if [ -n "$SLOT" ] ; then
break
fi
done
;;
esac
if [ -z "$SLOT" ] ; then
return
fi
CHAN=`map_channel $PCI_ID $PORT`
SLOT=`map_slot $SLOT $CHAN`
if [ -z "$CHAN" ] ; then
return
fi
echo ${CHAN}${SLOT}${PART}
}
scsi_handler() {
if [ -z "$FIRST_BAY_NUMBER" ] ; then
FIRST_BAY_NUMBER=`awk "\\$1 == \"first_bay_number\" \
{print \\$2; exit}" $CONFIG`
fi
FIRST_BAY_NUMBER=${FIRST_BAY_NUMBER:-0}
if [ -z "$PHYS_PER_PORT" ] ; then
PHYS_PER_PORT=`awk "\\$1 == \"phys_per_port\" \
{print \\$2; exit}" $CONFIG`
fi
PHYS_PER_PORT=${PHYS_PER_PORT:-4}
if ! echo $PHYS_PER_PORT | grep -q -E '^[0-9]+$' ; then
echo "Error: phys_per_port value $PHYS_PER_PORT is non-numeric"
exit 1
fi
if [ -z "$MULTIPATH_MODE" ] ; then
MULTIPATH_MODE=`awk "\\$1 == \"multipath\" \
{print \\$2; exit}" $CONFIG`
fi
# Use first running component device if we're handling a dm-mpath device
if [ "$MULTIPATH_MODE" = "yes" ] ; then
# If udev didn't tell us the UUID via DM_NAME, check /dev/mapper
if [ -z "$DM_NAME" ] ; then
DM_NAME=`ls -l --full-time /dev/mapper |
awk "/\/$DEV$/{print \\$9}"`
fi
# For raw disks udev exports DEVTYPE=partition when
# handling partitions, and the rules can be written to
# take advantage of this to append a -part suffix. For
# dm devices we get DEVTYPE=disk even for partitions so
# we have to append the -part suffix directly in the
# helper.
if [ "$DEVTYPE" != "partition" ] ; then
PART=`echo $DM_NAME | awk -Fp '/p/{print "-part"$2}'`
fi
# Strip off partition information.
DM_NAME=`echo $DM_NAME | sed 's/p[0-9][0-9]*$//'`
if [ -z "$DM_NAME" ] ; then
return
fi
# Get the raw scsi device name from multipath -ll. Strip off
# leading pipe symbols to make field numbering consistent.
DEV=`multipath -ll $DM_NAME |
awk '/running/{gsub("^[|]"," "); print $3 ; exit}'`
if [ -z "$DEV" ] ; then
return
fi
fi
if echo $DEV | grep -q ^/devices/ ; then
sys_path=$DEV
else
sys_path=`udevadm info -q path -p /sys/block/$DEV 2>/dev/null`
fi
# expect sys_path like this, for example:
# /devices/pci0000:00/0000:00:0b.0/0000:09:00.0/0000:0a:05.0/0000:0c:00.0/host3/target3:1:0/3:1:0:21/block/sdv
# Use positional parameters as an ad-hoc array
set -- $(echo "$sys_path" | tr / ' ')
num_dirs=$#
scsi_host_dir="/sys"
# Get path up to /sys/.../hostX
i=1
while [ $i -le $num_dirs ] ; do
d=$(eval echo \${$i})
scsi_host_dir="$scsi_host_dir/$d"
echo $d | grep -q -E '^host[0-9]+$' && break
i=$(($i + 1))
done
if [ $i = $num_dirs ] ; then
return
fi
PCI_ID=$(eval echo \${$(($i -1))} | awk -F: '{print $2":"$3}')
# In scsi mode, the directory two levels beneath
# /sys/.../hostX reveals the port and slot.
port_dir=$scsi_host_dir
j=$(($i + 2))
i=$(($i + 1))
while [ $i -le $j ] ; do
port_dir="$port_dir/$(eval echo \${$i})"
i=$(($i + 1))
done
set -- $(echo $port_dir | sed -e 's/^.*:\([^:]*\):\([^:]*\)$/\1 \2/')
PORT=$1
SLOT=$(($2 + $FIRST_BAY_NUMBER))
if [ -z "$SLOT" ] ; then
return
fi
CHAN=`map_channel $PCI_ID $PORT`
SLOT=`map_slot $SLOT $CHAN`
if [ -z "$CHAN" ] ; then
return
fi
echo ${CHAN}${SLOT}${PART}
}
# Figure out the name for the enclosure symlink
enclosure_handler () {
# We get all the info we need from udev's DEVPATH variable:
#
# DEVPATH=/sys/devices/pci0000:00/0000:00:03.0/0000:05:00.0/host0/subsystem/devices/0:0:0:0/scsi_generic/sg0
# Get the enclosure ID ("0:0:0:0")
ENC=$(basename $(readlink -m "/sys/$DEVPATH/../.."))
if [ ! -d /sys/class/enclosure/$ENC ] ; then
# Not an enclosure, bail out
return
fi
# Get the long sysfs device path to our enclosure. Looks like:
# /devices/pci0000:00/0000:00:03.0/0000:05:00.0/host0/port-0:0/ ... /enclosure/0:0:0:0
ENC_DEVICE=$(readlink /sys/class/enclosure/$ENC)
# Grab the full path to the hosts port dir:
# /devices/pci0000:00/0000:00:03.0/0000:05:00.0/host0/port-0:0
PORT_DIR=$(echo $ENC_DEVICE | grep -Eo '.+host[0-9]+/port-[0-9]+:[0-9]+')
# Get the port number
PORT_ID=$(echo $PORT_DIR | grep -Eo "[0-9]+$")
# The PCI directory is two directories up from the port directory
# /sys/devices/pci0000:00/0000:00:03.0/0000:05:00.0
PCI_ID_LONG=$(basename $(readlink -m "/sys/$PORT_DIR/../.."))
# Strip down the PCI address from 0000:05:00.0 to 05:00.0
PCI_ID=$(echo "$PCI_ID_LONG" | sed -r 's/^[0-9]+://g')
# Name our device according to vdev_id.conf (like "L0" or "U1").
NAME=$(awk "/channel/{if (\$1 == \"channel\" && \$2 == \"$PCI_ID\" && \
\$3 == \"$PORT_ID\") {print \$4int(count[\$4])}; count[\$4]++}" $CONFIG)
echo "${NAME}"
}
alias_handler () {
# Special handling is needed to correctly append a -part suffix
# to partitions of device mapper devices. The DEVTYPE attribute
# is normally set to "disk" instead of "partition" in this case,
# so the udev rules won't handle that for us as they do for
# "plain" block devices.
#
# For example, we may have the following links for a device and its
# partitions,
#
# /dev/disk/by-id/dm-name-isw_dibgbfcije_ARRAY0 -> ../../dm-0
# /dev/disk/by-id/dm-name-isw_dibgbfcije_ARRAY0p1 -> ../../dm-1
# /dev/disk/by-id/dm-name-isw_dibgbfcije_ARRAY0p2 -> ../../dm-3
#
# and the following alias in vdev_id.conf.
#
# alias A0 dm-name-isw_dibgbfcije_ARRAY0
#
# The desired outcome is for the following links to be created
# without having explicitly defined aliases for the partitions.
#
# /dev/disk/by-vdev/A0 -> ../../dm-0
# /dev/disk/by-vdev/A0-part1 -> ../../dm-1
# /dev/disk/by-vdev/A0-part2 -> ../../dm-3
#
# Warning: The following grep pattern will misidentify whole-disk
# devices whose names end with 'p' followed by a string of
# digits as partitions, causing alias creation to fail. This
# ambiguity seems unavoidable, so devices using this facility
# must not use such names.
DM_PART=
if echo $DM_NAME | grep -q -E 'p[0-9][0-9]*$' ; then
if [ "$DEVTYPE" != "partition" ] ; then
DM_PART=`echo $DM_NAME | awk -Fp '/p/{print "-part"$2}'`
fi
fi
# DEVLINKS attribute must have been populated by already-run udev rules.
for link in $DEVLINKS ; do
# Remove partition information to match key of top-level device.
if [ -n "$DM_PART" ] ; then
link=`echo $link | sed 's/p[0-9][0-9]*$//'`
fi
# Check both the fully qualified and the base name of link.
for l in $link `basename $link` ; do
alias=`awk "\\$1 == \"alias\" && \\$3 == \"${l}\" \
{ print \\$2; exit }" $CONFIG`
if [ -n "$alias" ] ; then
echo ${alias}${DM_PART}
return
fi
done
done
}
while getopts 'c:d:eg:mp:h' OPTION; do
case ${OPTION} in
c)
CONFIG=${OPTARG}
;;
d)
DEV=${OPTARG}
;;
e)
# When udev sees a scsi_generic device, it calls this script with -e to
# create the enclosure device symlinks only. We also need
# "enclosure_symlinks yes" set in vdev_id.config to actually create the
# symlink.
ENCLOSURE_MODE=$(awk '{if ($1 == "enclosure_symlinks") print $2}' $CONFIG)
if [ "$ENCLOSURE_MODE" != "yes" ] ; then
exit 0
fi
;;
g)
TOPOLOGY=$OPTARG
;;
p)
PHYS_PER_PORT=${OPTARG}
;;
m)
MULTIPATH_MODE=yes
;;
h)
usage
;;
esac
done
if [ ! -r $CONFIG ] ; then
exit 0
fi
if [ -z "$DEV" ] && [ -z "$ENCLOSURE_MODE" ] ; then
echo "Error: missing required option -d"
exit 1
fi
if [ -z "$TOPOLOGY" ] ; then
TOPOLOGY=`awk "\\$1 == \"topology\" {print \\$2; exit}" $CONFIG`
fi
if [ -z "$BAY" ] ; then
BAY=`awk "\\$1 == \"slot\" {print \\$2; exit}" $CONFIG`
fi
TOPOLOGY=${TOPOLOGY:-sas_direct}
# Should we create /dev/by-enclosure symlinks?
if [ "$ENCLOSURE_MODE" = "yes" ] && [ "$TOPOLOGY" = "sas_direct" ] ; then
ID_ENCLOSURE=$(enclosure_handler)
if [ -z "$ID_ENCLOSURE" ] ; then
exit 0
fi
# Just create the symlinks to the enclosure devices and then exit.
ENCLOSURE_PREFIX=$(awk '/enclosure_symlinks_prefix/{print $2}' $CONFIG)
if [ -z "$ENCLOSURE_PREFIX" ] ; then
ENCLOSURE_PREFIX="enc"
fi
echo "ID_ENCLOSURE=$ID_ENCLOSURE"
echo "ID_ENCLOSURE_PATH=by-enclosure/$ENCLOSURE_PREFIX-$ID_ENCLOSURE"
exit 0
fi
# First check if an alias was defined for this device.
ID_VDEV=`alias_handler`
if [ -z "$ID_VDEV" ] ; then
BAY=${BAY:-bay}
case $TOPOLOGY in
sas_direct|sas_switch)
ID_VDEV=`sas_handler`
;;
scsi)
ID_VDEV=`scsi_handler`
;;
*)
echo "Error: unknown topology $TOPOLOGY"
exit 1
;;
esac
fi
if [ -n "$ID_VDEV" ] ; then
echo "ID_VDEV=${ID_VDEV}"
echo "ID_VDEV_PATH=disk/by-vdev/${ID_VDEV}"
fi

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include $(top_srcdir)/config/Rules.am
# Unconditionally enable debugging for zdb
AM_CPPFLAGS += -DDEBUG -UNDEBUG -DZFS_DEBUG
sbin_PROGRAMS = zdb
zdb_SOURCES = \
zdb.c \
zdb_il.c \
zdb.h
zdb_LDADD = \
$(abs_top_builddir)/lib/libzpool/libzpool.la \
$(abs_top_builddir)/lib/libzfs_core/libzfs_core.la \
$(abs_top_builddir)/lib/libnvpair/libnvpair.la

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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2017 Spectra Logic Corp Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _ZDB_H
#define _ZDB_H
void dump_intent_log(zilog_t *);
extern uint8_t dump_opt[256];
#endif /* _ZDB_H */

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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Copyright (c) 2012 Cyril Plisko. All rights reserved.
* Use is subject to license terms.
*/
/*
* Copyright (c) 2013, 2017 by Delphix. All rights reserved.
*/
/*
* Print intent log header and statistics.
*/
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <sys/zfs_context.h>
#include <sys/spa.h>
#include <sys/dmu.h>
#include <sys/stat.h>
#include <sys/resource.h>
#include <sys/zil.h>
#include <sys/zil_impl.h>
#include <sys/spa_impl.h>
#include <sys/abd.h>
#include "zdb.h"
extern uint8_t dump_opt[256];
static char tab_prefix[4] = "\t\t\t";
static void
print_log_bp(const blkptr_t *bp, const char *prefix)
{
char blkbuf[BP_SPRINTF_LEN];
snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
(void) printf("%s%s\n", prefix, blkbuf);
}
/* ARGSUSED */
static void
zil_prt_rec_create(zilog_t *zilog, int txtype, const void *arg)
{
const lr_create_t *lr = arg;
time_t crtime = lr->lr_crtime[0];
char *name, *link;
lr_attr_t *lrattr;
name = (char *)(lr + 1);
if (lr->lr_common.lrc_txtype == TX_CREATE_ATTR ||
lr->lr_common.lrc_txtype == TX_MKDIR_ATTR) {
lrattr = (lr_attr_t *)(lr + 1);
name += ZIL_XVAT_SIZE(lrattr->lr_attr_masksize);
}
if (txtype == TX_SYMLINK) {
link = name + strlen(name) + 1;
(void) printf("%s%s -> %s\n", tab_prefix, name, link);
} else if (txtype != TX_MKXATTR) {
(void) printf("%s%s\n", tab_prefix, name);
}
(void) printf("%s%s", tab_prefix, ctime(&crtime));
(void) printf("%sdoid %llu, foid %llu, slots %llu, mode %llo\n",
tab_prefix, (u_longlong_t)lr->lr_doid,
(u_longlong_t)LR_FOID_GET_OBJ(lr->lr_foid),
(u_longlong_t)LR_FOID_GET_SLOTS(lr->lr_foid),
(longlong_t)lr->lr_mode);
(void) printf("%suid %llu, gid %llu, gen %llu, rdev 0x%llx\n",
tab_prefix,
(u_longlong_t)lr->lr_uid, (u_longlong_t)lr->lr_gid,
(u_longlong_t)lr->lr_gen, (u_longlong_t)lr->lr_rdev);
}
/* ARGSUSED */
static void
zil_prt_rec_remove(zilog_t *zilog, int txtype, const void *arg)
{
const lr_remove_t *lr = arg;
(void) printf("%sdoid %llu, name %s\n", tab_prefix,
(u_longlong_t)lr->lr_doid, (char *)(lr + 1));
}
/* ARGSUSED */
static void
zil_prt_rec_link(zilog_t *zilog, int txtype, const void *arg)
{
const lr_link_t *lr = arg;
(void) printf("%sdoid %llu, link_obj %llu, name %s\n", tab_prefix,
(u_longlong_t)lr->lr_doid, (u_longlong_t)lr->lr_link_obj,
(char *)(lr + 1));
}
/* ARGSUSED */
static void
zil_prt_rec_rename(zilog_t *zilog, int txtype, const void *arg)
{
const lr_rename_t *lr = arg;
char *snm = (char *)(lr + 1);
char *tnm = snm + strlen(snm) + 1;
(void) printf("%ssdoid %llu, tdoid %llu\n", tab_prefix,
(u_longlong_t)lr->lr_sdoid, (u_longlong_t)lr->lr_tdoid);
(void) printf("%ssrc %s tgt %s\n", tab_prefix, snm, tnm);
}
/* ARGSUSED */
static int
zil_prt_rec_write_cb(void *data, size_t len, void *unused)
{
char *cdata = data;
for (size_t i = 0; i < len; i++) {
if (isprint(*cdata))
(void) printf("%c ", *cdata);
else
(void) printf("%2X", *cdata);
cdata++;
}
return (0);
}
/* ARGSUSED */
static void
zil_prt_rec_write(zilog_t *zilog, int txtype, const void *arg)
{
const lr_write_t *lr = arg;
abd_t *data;
const blkptr_t *bp = &lr->lr_blkptr;
zbookmark_phys_t zb;
int verbose = MAX(dump_opt['d'], dump_opt['i']);
int error;
(void) printf("%sfoid %llu, offset %llx, length %llx\n", tab_prefix,
(u_longlong_t)lr->lr_foid, (u_longlong_t)lr->lr_offset,
(u_longlong_t)lr->lr_length);
if (txtype == TX_WRITE2 || verbose < 5)
return;
if (lr->lr_common.lrc_reclen == sizeof (lr_write_t)) {
(void) printf("%shas blkptr, %s\n", tab_prefix,
!BP_IS_HOLE(bp) &&
bp->blk_birth >= spa_min_claim_txg(zilog->zl_spa) ?
"will claim" : "won't claim");
print_log_bp(bp, tab_prefix);
if (BP_IS_HOLE(bp)) {
(void) printf("\t\t\tLSIZE 0x%llx\n",
(u_longlong_t)BP_GET_LSIZE(bp));
(void) printf("%s<hole>\n", tab_prefix);
return;
}
if (bp->blk_birth < zilog->zl_header->zh_claim_txg) {
(void) printf("%s<block already committed>\n",
tab_prefix);
return;
}
SET_BOOKMARK(&zb, dmu_objset_id(zilog->zl_os),
lr->lr_foid, ZB_ZIL_LEVEL,
lr->lr_offset / BP_GET_LSIZE(bp));
data = abd_alloc(BP_GET_LSIZE(bp), B_FALSE);
error = zio_wait(zio_read(NULL, zilog->zl_spa,
bp, data, BP_GET_LSIZE(bp), NULL, NULL,
ZIO_PRIORITY_SYNC_READ, ZIO_FLAG_CANFAIL, &zb));
if (error)
goto out;
} else {
/* data is stored after the end of the lr_write record */
data = abd_alloc(lr->lr_length, B_FALSE);
abd_copy_from_buf(data, lr + 1, lr->lr_length);
}
(void) printf("%s", tab_prefix);
(void) abd_iterate_func(data,
0, MIN(lr->lr_length, (verbose < 6 ? 20 : SPA_MAXBLOCKSIZE)),
zil_prt_rec_write_cb, NULL);
(void) printf("\n");
out:
abd_free(data);
}
/* ARGSUSED */
static void
zil_prt_rec_truncate(zilog_t *zilog, int txtype, const void *arg)
{
const lr_truncate_t *lr = arg;
(void) printf("%sfoid %llu, offset 0x%llx, length 0x%llx\n", tab_prefix,
(u_longlong_t)lr->lr_foid, (longlong_t)lr->lr_offset,
(u_longlong_t)lr->lr_length);
}
/* ARGSUSED */
static void
zil_prt_rec_setattr(zilog_t *zilog, int txtype, const void *arg)
{
const lr_setattr_t *lr = arg;
time_t atime = (time_t)lr->lr_atime[0];
time_t mtime = (time_t)lr->lr_mtime[0];
(void) printf("%sfoid %llu, mask 0x%llx\n", tab_prefix,
(u_longlong_t)lr->lr_foid, (u_longlong_t)lr->lr_mask);
if (lr->lr_mask & AT_MODE) {
(void) printf("%sAT_MODE %llo\n", tab_prefix,
(longlong_t)lr->lr_mode);
}
if (lr->lr_mask & AT_UID) {
(void) printf("%sAT_UID %llu\n", tab_prefix,
(u_longlong_t)lr->lr_uid);
}
if (lr->lr_mask & AT_GID) {
(void) printf("%sAT_GID %llu\n", tab_prefix,
(u_longlong_t)lr->lr_gid);
}
if (lr->lr_mask & AT_SIZE) {
(void) printf("%sAT_SIZE %llu\n", tab_prefix,
(u_longlong_t)lr->lr_size);
}
if (lr->lr_mask & AT_ATIME) {
(void) printf("%sAT_ATIME %llu.%09llu %s", tab_prefix,
(u_longlong_t)lr->lr_atime[0],
(u_longlong_t)lr->lr_atime[1],
ctime(&atime));
}
if (lr->lr_mask & AT_MTIME) {
(void) printf("%sAT_MTIME %llu.%09llu %s", tab_prefix,
(u_longlong_t)lr->lr_mtime[0],
(u_longlong_t)lr->lr_mtime[1],
ctime(&mtime));
}
}
/* ARGSUSED */
static void
zil_prt_rec_acl(zilog_t *zilog, int txtype, const void *arg)
{
const lr_acl_t *lr = arg;
(void) printf("%sfoid %llu, aclcnt %llu\n", tab_prefix,
(u_longlong_t)lr->lr_foid, (u_longlong_t)lr->lr_aclcnt);
}
typedef void (*zil_prt_rec_func_t)(zilog_t *, int, const void *);
typedef struct zil_rec_info {
zil_prt_rec_func_t zri_print;
const char *zri_name;
uint64_t zri_count;
} zil_rec_info_t;
static zil_rec_info_t zil_rec_info[TX_MAX_TYPE] = {
{.zri_print = NULL, .zri_name = "Total "},
{.zri_print = zil_prt_rec_create, .zri_name = "TX_CREATE "},
{.zri_print = zil_prt_rec_create, .zri_name = "TX_MKDIR "},
{.zri_print = zil_prt_rec_create, .zri_name = "TX_MKXATTR "},
{.zri_print = zil_prt_rec_create, .zri_name = "TX_SYMLINK "},
{.zri_print = zil_prt_rec_remove, .zri_name = "TX_REMOVE "},
{.zri_print = zil_prt_rec_remove, .zri_name = "TX_RMDIR "},
{.zri_print = zil_prt_rec_link, .zri_name = "TX_LINK "},
{.zri_print = zil_prt_rec_rename, .zri_name = "TX_RENAME "},
{.zri_print = zil_prt_rec_write, .zri_name = "TX_WRITE "},
{.zri_print = zil_prt_rec_truncate, .zri_name = "TX_TRUNCATE "},
{.zri_print = zil_prt_rec_setattr, .zri_name = "TX_SETATTR "},
{.zri_print = zil_prt_rec_acl, .zri_name = "TX_ACL_V0 "},
{.zri_print = zil_prt_rec_acl, .zri_name = "TX_ACL_ACL "},
{.zri_print = zil_prt_rec_create, .zri_name = "TX_CREATE_ACL "},
{.zri_print = zil_prt_rec_create, .zri_name = "TX_CREATE_ATTR "},
{.zri_print = zil_prt_rec_create, .zri_name = "TX_CREATE_ACL_ATTR "},
{.zri_print = zil_prt_rec_create, .zri_name = "TX_MKDIR_ACL "},
{.zri_print = zil_prt_rec_create, .zri_name = "TX_MKDIR_ATTR "},
{.zri_print = zil_prt_rec_create, .zri_name = "TX_MKDIR_ACL_ATTR "},
{.zri_print = zil_prt_rec_write, .zri_name = "TX_WRITE2 "},
};
/* ARGSUSED */
static int
print_log_record(zilog_t *zilog, const lr_t *lr, void *arg, uint64_t claim_txg)
{
int txtype;
int verbose = MAX(dump_opt['d'], dump_opt['i']);
/* reduce size of txtype to strip off TX_CI bit */
txtype = lr->lrc_txtype;
ASSERT(txtype != 0 && (uint_t)txtype < TX_MAX_TYPE);
ASSERT(lr->lrc_txg);
(void) printf("\t\t%s%s len %6llu, txg %llu, seq %llu\n",
(lr->lrc_txtype & TX_CI) ? "CI-" : "",
zil_rec_info[txtype].zri_name,
(u_longlong_t)lr->lrc_reclen,
(u_longlong_t)lr->lrc_txg,
(u_longlong_t)lr->lrc_seq);
if (txtype && verbose >= 3) {
if (!zilog->zl_os->os_encrypted) {
zil_rec_info[txtype].zri_print(zilog, txtype, lr);
} else {
(void) printf("%s(encrypted)\n", tab_prefix);
}
}
zil_rec_info[txtype].zri_count++;
zil_rec_info[0].zri_count++;
return (0);
}
/* ARGSUSED */
static int
print_log_block(zilog_t *zilog, const blkptr_t *bp, void *arg,
uint64_t claim_txg)
{
char blkbuf[BP_SPRINTF_LEN + 10];
int verbose = MAX(dump_opt['d'], dump_opt['i']);
const char *claim;
if (verbose <= 3)
return (0);
if (verbose >= 5) {
(void) strcpy(blkbuf, ", ");
snprintf_blkptr(blkbuf + strlen(blkbuf),
sizeof (blkbuf) - strlen(blkbuf), bp);
} else {
blkbuf[0] = '\0';
}
if (claim_txg != 0)
claim = "already claimed";
else if (bp->blk_birth >= spa_min_claim_txg(zilog->zl_spa))
claim = "will claim";
else
claim = "won't claim";
(void) printf("\tBlock seqno %llu, %s%s\n",
(u_longlong_t)bp->blk_cksum.zc_word[ZIL_ZC_SEQ], claim, blkbuf);
return (0);
}
static void
print_log_stats(int verbose)
{
unsigned i, w, p10;
if (verbose > 3)
(void) printf("\n");
if (zil_rec_info[0].zri_count == 0)
return;
for (w = 1, p10 = 10; zil_rec_info[0].zri_count >= p10; p10 *= 10)
w++;
for (i = 0; i < TX_MAX_TYPE; i++)
if (zil_rec_info[i].zri_count || verbose >= 3)
(void) printf("\t\t%s %*llu\n",
zil_rec_info[i].zri_name, w,
(u_longlong_t)zil_rec_info[i].zri_count);
(void) printf("\n");
}
/* ARGSUSED */
void
dump_intent_log(zilog_t *zilog)
{
const zil_header_t *zh = zilog->zl_header;
int verbose = MAX(dump_opt['d'], dump_opt['i']);
int i;
if (BP_IS_HOLE(&zh->zh_log) || verbose < 1)
return;
(void) printf("\n ZIL header: claim_txg %llu, "
"claim_blk_seq %llu, claim_lr_seq %llu",
(u_longlong_t)zh->zh_claim_txg,
(u_longlong_t)zh->zh_claim_blk_seq,
(u_longlong_t)zh->zh_claim_lr_seq);
(void) printf(" replay_seq %llu, flags 0x%llx\n",
(u_longlong_t)zh->zh_replay_seq, (u_longlong_t)zh->zh_flags);
for (i = 0; i < TX_MAX_TYPE; i++)
zil_rec_info[i].zri_count = 0;
/* see comment in zil_claim() or zil_check_log_chain() */
if (zilog->zl_spa->spa_uberblock.ub_checkpoint_txg != 0 &&
zh->zh_claim_txg == 0)
return;
if (verbose >= 2) {
(void) printf("\n");
(void) zil_parse(zilog, print_log_block, print_log_record, NULL,
zh->zh_claim_txg, B_FALSE);
print_log_stats(verbose);
}
}

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include $(top_srcdir)/config/Rules.am
AM_CFLAGS += $(LIBUDEV_CFLAGS) $(LIBUUID_CFLAGS)
SUBDIRS = zed.d
sbin_PROGRAMS = zed
ZED_SRC = \
zed.c \
zed.h \
zed_conf.c \
zed_conf.h \
zed_disk_event.c \
zed_disk_event.h \
zed_event.c \
zed_event.h \
zed_exec.c \
zed_exec.h \
zed_file.c \
zed_file.h \
zed_log.c \
zed_log.h \
zed_strings.c \
zed_strings.h
FMA_SRC = \
agents/zfs_agents.c \
agents/zfs_agents.h \
agents/zfs_diagnosis.c \
agents/zfs_mod.c \
agents/zfs_retire.c \
agents/fmd_api.c \
agents/fmd_api.h \
agents/fmd_serd.c \
agents/fmd_serd.h
zed_SOURCES = $(ZED_SRC) $(FMA_SRC)
zed_LDADD = \
$(abs_top_builddir)/lib/libzfs/libzfs.la \
$(abs_top_builddir)/lib/libzfs_core/libzfs_core.la \
$(abs_top_builddir)/lib/libnvpair/libnvpair.la \
$(abs_top_builddir)/lib/libuutil/libuutil.la
zed_LDADD += -lrt $(LIBUDEV_LIBS) $(LIBUUID_LIBS)
zed_LDFLAGS = -pthread
EXTRA_DIST = agents/README.md

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## Fault Management Logic for ZED ##
The integration of Fault Management Daemon (FMD) logic from illumos
is being deployed in three phases. This logic is encapsulated in
several software modules inside ZED.
### ZED+FM Phase 1 ###
All the phase 1 work is in current Master branch. Phase I work includes:
* Add new paths to the persistent VDEV label for device matching.
* Add a disk monitor for generating _disk-add_ and _disk-change_ events.
* Add support for automated VDEV auto-online, auto-replace and auto-expand.
* Expand the statechange event to include all VDEV state transitions.
### ZED+FM Phase 2 (WIP) ###
The phase 2 work primarily entails the _Diagnosis Engine_ and the
_Retire Agent_ modules. It also includes infrastructure to support a
crude FMD environment to host these modules. For additional
information see the **FMD Components in ZED** and **Implementation
Notes** sections below.
### ZED+FM Phase 3 ###
Future work will add additional functionality and will likely include:
* Add FMD module garbage collection (periodically call `fmd_module_gc()`).
* Add real module property retrieval (currently hard-coded in accessors).
* Additional diagnosis telemetry (like latency outliers and SMART data).
* Export FMD module statistics.
* Zedlet parallel execution and resiliency (add watchdog).
### ZFS Fault Management Overview ###
The primary purpose with ZFS fault management is automated diagnosis
and isolation of VDEV faults. A fault is something we can associate
with an impact (e.g. loss of data redundancy) and a corrective action
(e.g. offline or replace a disk). A typical ZFS fault management stack
is comprised of _error detectors_ (e.g. `zfs_ereport_post()`), a _disk
monitor_, a _diagnosis engine_ and _response agents_.
After detecting a software error, the ZFS kernel module sends error
events to the ZED user daemon which in turn routes the events to its
internal FMA modules based on their event subscriptions. Likewise, if
a disk is added or changed in the system, the disk monitor sends disk
events which are consumed by a response agent.
### FMD Components in ZED ###
There are three FMD modules (aka agents) that are now built into ZED.
1. A _Diagnosis Engine_ module (`agents/zfs_diagnosis.c`)
2. A _Retire Agent_ module (`agents/zfs_retire.c`)
3. A _Disk Add Agent_ module (`agents/zfs_mod.c`)
To begin with, a **Diagnosis Engine** consumes per-vdev I/O and checksum
ereports and feeds them into a Soft Error Rate Discrimination (SERD)
algorithm which will generate a corresponding fault diagnosis when the
tracked VDEV encounters **N** events in a given **T** time window. The
initial N and T values for the SERD algorithm are estimates inherited
from illumos (10 errors in 10 minutes).
In turn, a **Retire Agent** responds to diagnosed faults by isolating
the faulty VDEV. It will notify the ZFS kernel module of the new VDEV
state (degraded or faulted). The retire agent is also responsible for
managing hot spares across all pools. When it encounters a device fault
or a device removal it will replace the device with an appropriate
spare if available.
Finally, a **Disk Add Agent** responds to events from a libudev disk
monitor (`EC_DEV_ADD` or `EC_DEV_STATUS`) and will online, replace or
expand the associated VDEV. This agent is also known as the `zfs_mod`
or Sysevent Loadable Module (SLM) on the illumos platform. The added
disk is matched to a specific VDEV using its device id, physical path
or VDEV GUID.
Note that the _auto-replace_ feature (aka hot plug) is opt-in and you
must set the pool's `autoreplace` property to enable it. The new disk
will be matched to the corresponding leaf VDEV by physical location
and labeled with a GPT partition before replacing the original VDEV
in the pool.
### Implementation Notes ###
* The FMD module API required for logic modules is emulated and implemented
in the `fmd_api.c` and `fmd_serd.c` source files. This support includes
module registration, memory allocation, module property accessors, basic
case management, one-shot timers and SERD engines.
For detailed information on the FMD module API, see the document --
_"Fault Management Daemon Programmer's Reference Manual"_.
* The event subscriptions for the modules (located in a module specific
configuration file on illumos) are currently hard-coded into the ZED
`zfs_agent_dispatch()` function.
* The FMD modules are called one at a time from a single thread that
consumes events queued to the modules. These events are sourced from
the normal ZED events and also include events posted from the diagnosis
engine and the libudev disk event monitor.
* The FMD code modules have minimal changes and were intentionally left
as similar as possible to their upstream source files.
* The sysevent namespace in ZED differs from illumos. For example:
* illumos uses `"resource.sysevent.EC_zfs.ESC_ZFS_vdev_remove"`
* Linux uses `"sysevent.fs.zfs.vdev_remove"`
* The FMD Modules port was produced by Intel Federal, LLC under award
number B609815 between the U.S. Department of Energy (DOE) and Intel
Federal, LLC.

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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
*
* Copyright (c) 2016, Intel Corporation.
*/
/*
* This file implements the minimal FMD module API required to support the
* fault logic modules in ZED. This support includes module registration,
* memory allocation, module property accessors, basic case management,
* one-shot timers and SERD engines.
*
* In the ZED runtime, the modules are called from a single thread so no
* locking is required in this emulated FMD environment.
*/
#include <sys/types.h>
#include <sys/fm/protocol.h>
#include <uuid/uuid.h>
#include <signal.h>
#include <strings.h>
#include <time.h>
#include "fmd_api.h"
#include "fmd_serd.h"
#include "zfs_agents.h"
#include "../zed_log.h"
typedef struct fmd_modstat {
fmd_stat_t ms_accepted; /* total events accepted by module */
fmd_stat_t ms_caseopen; /* cases currently open */
fmd_stat_t ms_casesolved; /* total cases solved by module */
fmd_stat_t ms_caseclosed; /* total cases closed by module */
} fmd_modstat_t;
typedef struct fmd_module {
const char *mod_name; /* basename of module (ro) */
const fmd_hdl_info_t *mod_info; /* module info registered with handle */
void *mod_spec; /* fmd_hdl_get/setspecific data value */
fmd_stat_t *mod_ustat; /* module specific custom stats */
uint_t mod_ustat_cnt; /* count of ustat stats */
fmd_modstat_t mod_stats; /* fmd built-in per-module statistics */
fmd_serd_hash_t mod_serds; /* hash of serd engs owned by module */
char *mod_vers; /* a copy of module version string */
} fmd_module_t;
/*
* ZED has two FMD hardwired module instances
*/
fmd_module_t zfs_retire_module;
fmd_module_t zfs_diagnosis_module;
/*
* Enable a reasonable set of defaults for libumem debugging on DEBUG builds.
*/
#ifdef DEBUG
const char *
_umem_debug_init(void)
{
return ("default,verbose"); /* $UMEM_DEBUG setting */
}
const char *
_umem_logging_init(void)
{
return ("fail,contents"); /* $UMEM_LOGGING setting */
}
#endif
/*
* Register a module with fmd and finish module initialization.
* Returns an integer indicating whether it succeeded (zero) or
* failed (non-zero).
*/
int
fmd_hdl_register(fmd_hdl_t *hdl, int version, const fmd_hdl_info_t *mip)
{
fmd_module_t *mp = (fmd_module_t *)hdl;
mp->mod_info = mip;
mp->mod_name = mip->fmdi_desc + 4; /* drop 'ZFS ' prefix */
mp->mod_spec = NULL;
/* bare minimum module stats */
(void) strcpy(mp->mod_stats.ms_accepted.fmds_name, "fmd.accepted");
(void) strcpy(mp->mod_stats.ms_caseopen.fmds_name, "fmd.caseopen");
(void) strcpy(mp->mod_stats.ms_casesolved.fmds_name, "fmd.casesolved");
(void) strcpy(mp->mod_stats.ms_caseclosed.fmds_name, "fmd.caseclosed");
fmd_serd_hash_create(&mp->mod_serds);
fmd_hdl_debug(hdl, "register module");
return (0);
}
void
fmd_hdl_unregister(fmd_hdl_t *hdl)
{
fmd_module_t *mp = (fmd_module_t *)hdl;
fmd_modstat_t *msp = &mp->mod_stats;
const fmd_hdl_ops_t *ops = mp->mod_info->fmdi_ops;
/* dump generic module stats */
fmd_hdl_debug(hdl, "%s: %llu", msp->ms_accepted.fmds_name,
msp->ms_accepted.fmds_value.ui64);
if (ops->fmdo_close != NULL) {
fmd_hdl_debug(hdl, "%s: %llu", msp->ms_caseopen.fmds_name,
msp->ms_caseopen.fmds_value.ui64);
fmd_hdl_debug(hdl, "%s: %llu", msp->ms_casesolved.fmds_name,
msp->ms_casesolved.fmds_value.ui64);
fmd_hdl_debug(hdl, "%s: %llu", msp->ms_caseclosed.fmds_name,
msp->ms_caseclosed.fmds_value.ui64);
}
/* dump module specific stats */
if (mp->mod_ustat != NULL) {
int i;
for (i = 0; i < mp->mod_ustat_cnt; i++) {
fmd_hdl_debug(hdl, "%s: %llu",
mp->mod_ustat[i].fmds_name,
mp->mod_ustat[i].fmds_value.ui64);
}
}
fmd_serd_hash_destroy(&mp->mod_serds);
fmd_hdl_debug(hdl, "unregister module");
}
/*
* fmd_hdl_setspecific() is used to associate a data pointer with
* the specified handle for the duration of the module's lifetime.
* This pointer can be retrieved using fmd_hdl_getspecific().
*/
void
fmd_hdl_setspecific(fmd_hdl_t *hdl, void *spec)
{
fmd_module_t *mp = (fmd_module_t *)hdl;
mp->mod_spec = spec;
}
/*
* Return the module-specific data pointer previously associated
* with the handle using fmd_hdl_setspecific().
*/
void *
fmd_hdl_getspecific(fmd_hdl_t *hdl)
{
fmd_module_t *mp = (fmd_module_t *)hdl;
return (mp->mod_spec);
}
void *
fmd_hdl_alloc(fmd_hdl_t *hdl, size_t size, int flags)
{
return (umem_alloc(size, flags));
}
void *
fmd_hdl_zalloc(fmd_hdl_t *hdl, size_t size, int flags)
{
return (umem_zalloc(size, flags));
}
void
fmd_hdl_free(fmd_hdl_t *hdl, void *data, size_t size)
{
umem_free(data, size);
}
/*
* Record a module debug message using the specified format.
*/
void
fmd_hdl_debug(fmd_hdl_t *hdl, const char *format, ...)
{
char message[256];
va_list vargs;
fmd_module_t *mp = (fmd_module_t *)hdl;
va_start(vargs, format);
(void) vsnprintf(message, sizeof (message), format, vargs);
va_end(vargs);
/* prefix message with module name */
zed_log_msg(LOG_INFO, "%s: %s", mp->mod_name, message);
}
/* Property Retrieval */
int32_t
fmd_prop_get_int32(fmd_hdl_t *hdl, const char *name)
{
/*
* These can be looked up in mp->modinfo->fmdi_props
* For now we just hard code for phase 2. In the
* future, there can be a ZED based override.
*/
if (strcmp(name, "spare_on_remove") == 0)
return (1);
if (strcmp(name, "io_N") == 0 || strcmp(name, "checksum_N") == 0)
return (10); /* N = 10 events */
return (0);
}
int64_t
fmd_prop_get_int64(fmd_hdl_t *hdl, const char *name)
{
/*
* These can be looked up in mp->modinfo->fmdi_props
* For now we just hard code for phase 2. In the
* future, there can be a ZED based override.
*/
if (strcmp(name, "remove_timeout") == 0)
return (15ULL * 1000ULL * 1000ULL * 1000ULL); /* 15 sec */
if (strcmp(name, "io_T") == 0 || strcmp(name, "checksum_T") == 0)
return (1000ULL * 1000ULL * 1000ULL * 600ULL); /* 10 min */
return (0);
}
/* FMD Statistics */
fmd_stat_t *
fmd_stat_create(fmd_hdl_t *hdl, uint_t flags, uint_t nstats, fmd_stat_t *statv)
{
fmd_module_t *mp = (fmd_module_t *)hdl;
if (flags == FMD_STAT_NOALLOC) {
mp->mod_ustat = statv;
mp->mod_ustat_cnt = nstats;
}
return (statv);
}
/* Case Management */
fmd_case_t *
fmd_case_open(fmd_hdl_t *hdl, void *data)
{
fmd_module_t *mp = (fmd_module_t *)hdl;
uuid_t uuid;
fmd_case_t *cp;
cp = fmd_hdl_zalloc(hdl, sizeof (fmd_case_t), FMD_SLEEP);
cp->ci_mod = hdl;
cp->ci_state = FMD_CASE_UNSOLVED;
cp->ci_flags = FMD_CF_DIRTY;
cp->ci_data = data;
cp->ci_bufptr = NULL;
cp->ci_bufsiz = 0;
uuid_generate(uuid);
uuid_unparse(uuid, cp->ci_uuid);
fmd_hdl_debug(hdl, "case opened (%s)", cp->ci_uuid);
mp->mod_stats.ms_caseopen.fmds_value.ui64++;
return (cp);
}
void
fmd_case_solve(fmd_hdl_t *hdl, fmd_case_t *cp)
{
fmd_module_t *mp = (fmd_module_t *)hdl;
/*
* For ZED, the event was already sent from fmd_case_add_suspect()
*/
if (cp->ci_state >= FMD_CASE_SOLVED)
fmd_hdl_debug(hdl, "case is already solved or closed");
cp->ci_state = FMD_CASE_SOLVED;
fmd_hdl_debug(hdl, "case solved (%s)", cp->ci_uuid);
mp->mod_stats.ms_casesolved.fmds_value.ui64++;
}
void
fmd_case_close(fmd_hdl_t *hdl, fmd_case_t *cp)
{
fmd_module_t *mp = (fmd_module_t *)hdl;
const fmd_hdl_ops_t *ops = mp->mod_info->fmdi_ops;
fmd_hdl_debug(hdl, "case closed (%s)", cp->ci_uuid);
if (ops->fmdo_close != NULL)
ops->fmdo_close(hdl, cp);
mp->mod_stats.ms_caseopen.fmds_value.ui64--;
mp->mod_stats.ms_caseclosed.fmds_value.ui64++;
if (cp->ci_bufptr != NULL && cp->ci_bufsiz > 0)
fmd_hdl_free(hdl, cp->ci_bufptr, cp->ci_bufsiz);
fmd_hdl_free(hdl, cp, sizeof (fmd_case_t));
}
void
fmd_case_uuresolved(fmd_hdl_t *hdl, const char *uuid)
{
fmd_hdl_debug(hdl, "case resolved by uuid (%s)", uuid);
}
int
fmd_case_solved(fmd_hdl_t *hdl, fmd_case_t *cp)
{
return ((cp->ci_state >= FMD_CASE_SOLVED) ? FMD_B_TRUE : FMD_B_FALSE);
}
void
fmd_case_add_ereport(fmd_hdl_t *hdl, fmd_case_t *cp, fmd_event_t *ep)
{
}
static void
zed_log_fault(nvlist_t *nvl, const char *uuid, const char *code)
{
nvlist_t *rsrc;
char *strval;
uint64_t guid;
uint8_t byte;
zed_log_msg(LOG_INFO, "\nzed_fault_event:");
if (uuid != NULL)
zed_log_msg(LOG_INFO, "\t%s: %s", FM_SUSPECT_UUID, uuid);
if (nvlist_lookup_string(nvl, FM_CLASS, &strval) == 0)
zed_log_msg(LOG_INFO, "\t%s: %s", FM_CLASS, strval);
if (code != NULL)
zed_log_msg(LOG_INFO, "\t%s: %s", FM_SUSPECT_DIAG_CODE, code);
if (nvlist_lookup_uint8(nvl, FM_FAULT_CERTAINTY, &byte) == 0)
zed_log_msg(LOG_INFO, "\t%s: %llu", FM_FAULT_CERTAINTY, byte);
if (nvlist_lookup_nvlist(nvl, FM_FAULT_RESOURCE, &rsrc) == 0) {
if (nvlist_lookup_string(rsrc, FM_FMRI_SCHEME, &strval) == 0)
zed_log_msg(LOG_INFO, "\t%s: %s", FM_FMRI_SCHEME,
strval);
if (nvlist_lookup_uint64(rsrc, FM_FMRI_ZFS_POOL, &guid) == 0)
zed_log_msg(LOG_INFO, "\t%s: %llu", FM_FMRI_ZFS_POOL,
guid);
if (nvlist_lookup_uint64(rsrc, FM_FMRI_ZFS_VDEV, &guid) == 0)
zed_log_msg(LOG_INFO, "\t%s: %llu \n", FM_FMRI_ZFS_VDEV,
guid);
}
}
static const char *
fmd_fault_mkcode(nvlist_t *fault)
{
char *class, *code = "-";
/*
* Note: message codes come from: openzfs/usr/src/cmd/fm/dicts/ZFS.po
*/
if (nvlist_lookup_string(fault, FM_CLASS, &class) == 0) {
if (strcmp(class, "fault.fs.zfs.vdev.io") == 0)
code = "ZFS-8000-FD";
else if (strcmp(class, "fault.fs.zfs.vdev.checksum") == 0)
code = "ZFS-8000-GH";
else if (strcmp(class, "fault.fs.zfs.io_failure_wait") == 0)
code = "ZFS-8000-HC";
else if (strcmp(class, "fault.fs.zfs.io_failure_continue") == 0)
code = "ZFS-8000-JQ";
else if (strcmp(class, "fault.fs.zfs.log_replay") == 0)
code = "ZFS-8000-K4";
else if (strcmp(class, "fault.fs.zfs.pool") == 0)
code = "ZFS-8000-CS";
else if (strcmp(class, "fault.fs.zfs.device") == 0)
code = "ZFS-8000-D3";
}
return (code);
}
void
fmd_case_add_suspect(fmd_hdl_t *hdl, fmd_case_t *cp, nvlist_t *fault)
{
nvlist_t *nvl;
const char *code = fmd_fault_mkcode(fault);
int64_t tod[2];
int err = 0;
/*
* payload derived from fmd_protocol_list()
*/
(void) gettimeofday(&cp->ci_tv, NULL);
tod[0] = cp->ci_tv.tv_sec;
tod[1] = cp->ci_tv.tv_usec;
nvl = fmd_nvl_alloc(hdl, FMD_SLEEP);
err |= nvlist_add_uint8(nvl, FM_VERSION, FM_SUSPECT_VERSION);
err |= nvlist_add_string(nvl, FM_CLASS, FM_LIST_SUSPECT_CLASS);
err |= nvlist_add_string(nvl, FM_SUSPECT_UUID, cp->ci_uuid);
err |= nvlist_add_string(nvl, FM_SUSPECT_DIAG_CODE, code);
err |= nvlist_add_int64_array(nvl, FM_SUSPECT_DIAG_TIME, tod, 2);
err |= nvlist_add_uint32(nvl, FM_SUSPECT_FAULT_SZ, 1);
err |= nvlist_add_nvlist_array(nvl, FM_SUSPECT_FAULT_LIST, &fault, 1);
if (err)
zed_log_die("failed to populate nvlist");
zed_log_fault(fault, cp->ci_uuid, code);
zfs_agent_post_event(FM_LIST_SUSPECT_CLASS, NULL, nvl);
nvlist_free(nvl);
nvlist_free(fault);
}
void
fmd_case_setspecific(fmd_hdl_t *hdl, fmd_case_t *cp, void *data)
{
cp->ci_data = data;
}
void *
fmd_case_getspecific(fmd_hdl_t *hdl, fmd_case_t *cp)
{
return (cp->ci_data);
}
void
fmd_buf_create(fmd_hdl_t *hdl, fmd_case_t *cp, const char *name, size_t size)
{
assert(strcmp(name, "data") == 0);
assert(cp->ci_bufptr == NULL);
assert(size < (1024 * 1024));
cp->ci_bufptr = fmd_hdl_alloc(hdl, size, FMD_SLEEP);
cp->ci_bufsiz = size;
}
void
fmd_buf_read(fmd_hdl_t *hdl, fmd_case_t *cp,
const char *name, void *buf, size_t size)
{
assert(strcmp(name, "data") == 0);
assert(cp->ci_bufptr != NULL);
assert(size <= cp->ci_bufsiz);
bcopy(cp->ci_bufptr, buf, size);
}
void
fmd_buf_write(fmd_hdl_t *hdl, fmd_case_t *cp,
const char *name, const void *buf, size_t size)
{
assert(strcmp(name, "data") == 0);
assert(cp->ci_bufptr != NULL);
assert(cp->ci_bufsiz >= size);
bcopy(buf, cp->ci_bufptr, size);
}
/* SERD Engines */
void
fmd_serd_create(fmd_hdl_t *hdl, const char *name, uint_t n, hrtime_t t)
{
fmd_module_t *mp = (fmd_module_t *)hdl;
if (fmd_serd_eng_lookup(&mp->mod_serds, name) != NULL) {
zed_log_msg(LOG_ERR, "failed to create SERD engine '%s': "
" name already exists", name);
return;
}
(void) fmd_serd_eng_insert(&mp->mod_serds, name, n, t);
}
void
fmd_serd_destroy(fmd_hdl_t *hdl, const char *name)
{
fmd_module_t *mp = (fmd_module_t *)hdl;
fmd_serd_eng_delete(&mp->mod_serds, name);
fmd_hdl_debug(hdl, "serd_destroy %s", name);
}
int
fmd_serd_exists(fmd_hdl_t *hdl, const char *name)
{
fmd_module_t *mp = (fmd_module_t *)hdl;
return (fmd_serd_eng_lookup(&mp->mod_serds, name) != NULL);
}
void
fmd_serd_reset(fmd_hdl_t *hdl, const char *name)
{
fmd_module_t *mp = (fmd_module_t *)hdl;
fmd_serd_eng_t *sgp;
if ((sgp = fmd_serd_eng_lookup(&mp->mod_serds, name)) == NULL) {
zed_log_msg(LOG_ERR, "serd engine '%s' does not exist", name);
return;
}
fmd_serd_eng_reset(sgp);
fmd_hdl_debug(hdl, "serd_reset %s", name);
}
int
fmd_serd_record(fmd_hdl_t *hdl, const char *name, fmd_event_t *ep)
{
fmd_module_t *mp = (fmd_module_t *)hdl;
fmd_serd_eng_t *sgp;
int err;
if ((sgp = fmd_serd_eng_lookup(&mp->mod_serds, name)) == NULL) {
zed_log_msg(LOG_ERR, "failed to add record to SERD engine '%s'",
name);
return (FMD_B_FALSE);
}
err = fmd_serd_eng_record(sgp, ep->ev_hrt);
return (err);
}
/* FMD Timers */
static void
_timer_notify(union sigval sv)
{
fmd_timer_t *ftp = sv.sival_ptr;
fmd_hdl_t *hdl = ftp->ft_hdl;
fmd_module_t *mp = (fmd_module_t *)hdl;
const fmd_hdl_ops_t *ops = mp->mod_info->fmdi_ops;
struct itimerspec its;
fmd_hdl_debug(hdl, "timer fired (%p)", ftp->ft_tid);
/* disarm the timer */
bzero(&its, sizeof (struct itimerspec));
timer_settime(ftp->ft_tid, 0, &its, NULL);
/* Note that the fmdo_timeout can remove this timer */
if (ops->fmdo_timeout != NULL)
ops->fmdo_timeout(hdl, ftp, ftp->ft_arg);
}
/*
* Install a new timer which will fire at least delta nanoseconds after the
* current time. After the timeout has expired, the module's fmdo_timeout
* entry point is called.
*/
fmd_timer_t *
fmd_timer_install(fmd_hdl_t *hdl, void *arg, fmd_event_t *ep, hrtime_t delta)
{
struct sigevent sev;
struct itimerspec its;
fmd_timer_t *ftp;
ftp = fmd_hdl_alloc(hdl, sizeof (fmd_timer_t), FMD_SLEEP);
ftp->ft_arg = arg;
ftp->ft_hdl = hdl;
its.it_value.tv_sec = delta / 1000000000;
its.it_value.tv_nsec = delta % 1000000000;
its.it_interval.tv_sec = its.it_value.tv_sec;
its.it_interval.tv_nsec = its.it_value.tv_nsec;
sev.sigev_notify = SIGEV_THREAD;
sev.sigev_notify_function = _timer_notify;
sev.sigev_notify_attributes = NULL;
sev.sigev_value.sival_ptr = ftp;
timer_create(CLOCK_REALTIME, &sev, &ftp->ft_tid);
timer_settime(ftp->ft_tid, 0, &its, NULL);
fmd_hdl_debug(hdl, "installing timer for %d secs (%p)",
(int)its.it_value.tv_sec, ftp->ft_tid);
return (ftp);
}
void
fmd_timer_remove(fmd_hdl_t *hdl, fmd_timer_t *ftp)
{
fmd_hdl_debug(hdl, "removing timer (%p)", ftp->ft_tid);
timer_delete(ftp->ft_tid);
fmd_hdl_free(hdl, ftp, sizeof (fmd_timer_t));
}
/* Name-Value Pair Lists */
nvlist_t *
fmd_nvl_create_fault(fmd_hdl_t *hdl, const char *class, uint8_t certainty,
nvlist_t *asru, nvlist_t *fru, nvlist_t *resource)
{
nvlist_t *nvl;
int err = 0;
if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0)
zed_log_die("failed to xalloc fault nvlist");
err |= nvlist_add_uint8(nvl, FM_VERSION, FM_FAULT_VERSION);
err |= nvlist_add_string(nvl, FM_CLASS, class);
err |= nvlist_add_uint8(nvl, FM_FAULT_CERTAINTY, certainty);
if (asru != NULL)
err |= nvlist_add_nvlist(nvl, FM_FAULT_ASRU, asru);
if (fru != NULL)
err |= nvlist_add_nvlist(nvl, FM_FAULT_FRU, fru);
if (resource != NULL)
err |= nvlist_add_nvlist(nvl, FM_FAULT_RESOURCE, resource);
if (err)
zed_log_die("failed to populate nvlist: %s\n", strerror(err));
return (nvl);
}
/*
* sourced from fmd_string.c
*/
static int
fmd_strmatch(const char *s, const char *p)
{
char c;
if (p == NULL)
return (0);
if (s == NULL)
s = ""; /* treat NULL string as the empty string */
do {
if ((c = *p++) == '\0')
return (*s == '\0');
if (c == '*') {
while (*p == '*')
p++; /* consecutive *'s can be collapsed */
if (*p == '\0')
return (1);
while (*s != '\0') {
if (fmd_strmatch(s++, p) != 0)
return (1);
}
return (0);
}
} while (c == *s++);
return (0);
}
int
fmd_nvl_class_match(fmd_hdl_t *hdl, nvlist_t *nvl, const char *pattern)
{
char *class;
return (nvl != NULL &&
nvlist_lookup_string(nvl, FM_CLASS, &class) == 0 &&
fmd_strmatch(class, pattern));
}
nvlist_t *
fmd_nvl_alloc(fmd_hdl_t *hdl, int flags)
{
nvlist_t *nvl = NULL;
if (nvlist_alloc(&nvl, NV_UNIQUE_NAME, 0) != 0)
return (NULL);
return (nvl);
}
/*
* ZED Agent specific APIs
*/
fmd_hdl_t *
fmd_module_hdl(const char *name)
{
if (strcmp(name, "zfs-retire") == 0)
return ((fmd_hdl_t *)&zfs_retire_module);
if (strcmp(name, "zfs-diagnosis") == 0)
return ((fmd_hdl_t *)&zfs_diagnosis_module);
return (NULL);
}
boolean_t
fmd_module_initialized(fmd_hdl_t *hdl)
{
fmd_module_t *mp = (fmd_module_t *)hdl;
return (mp->mod_info != NULL);
}
/*
* fmd_module_recv is called for each event that is received by
* the fault manager that has a class that matches one of the
* module's subscriptions.
*/
void
fmd_module_recv(fmd_hdl_t *hdl, nvlist_t *nvl, const char *class)
{
fmd_module_t *mp = (fmd_module_t *)hdl;
const fmd_hdl_ops_t *ops = mp->mod_info->fmdi_ops;
fmd_event_t faux_event = {0};
int64_t *tv;
uint_t n;
/*
* Will need to normalized this if we persistently store the case data
*/
if (nvlist_lookup_int64_array(nvl, FM_EREPORT_TIME, &tv, &n) == 0)
faux_event.ev_hrt = tv[0] * NANOSEC + tv[1];
else
faux_event.ev_hrt = 0;
ops->fmdo_recv(hdl, &faux_event, nvl, class);
mp->mod_stats.ms_accepted.fmds_value.ui64++;
/* TBD - should we initiate fm_module_gc() periodically? */
}

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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
*
* Copyright (c) 2016, Intel Corporation.
*/
#ifndef _FMD_API_H
#define _FMD_API_H
#include <sys/types.h>
#include <sys/time.h>
#include <time.h>
#include <libnvpair.h>
#include <stdarg.h>
#include <umem.h>
#ifdef __cplusplus
extern "C" {
#endif
/*
* Fault Management Daemon Client Interfaces
*/
#define FMD_API_VERSION 5
typedef struct fmd_hdl fmd_hdl_t;
typedef struct fmd_timer {
timer_t ft_tid;
void *ft_arg;
fmd_hdl_t *ft_hdl;
} fmd_timer_t;
#define id_t fmd_timer_t *
typedef struct fmd_event {
hrtime_t ev_hrt; /* event time used by SERD engines */
} fmd_event_t;
typedef struct fmd_case {
char ci_uuid[48]; /* uuid string for this case */
fmd_hdl_t *ci_mod; /* module that owns this case */
void *ci_data; /* data from fmd_case_setspecific() */
ushort_t ci_state; /* case state (see below) */
ushort_t ci_flags; /* case flags (see below) */
struct timeval ci_tv; /* time of original diagnosis */
void *ci_bufptr; /* case data serialization buffer */
size_t ci_bufsiz;
} fmd_case_t;
#define FMD_B_FALSE 0 /* false value for booleans as int */
#define FMD_B_TRUE 1 /* true value for booleans as int */
#define FMD_CASE_UNSOLVED 0 /* case is not yet solved (waiting) */
#define FMD_CASE_SOLVED 1 /* case is solved (suspects added) */
#define FMD_CASE_CLOSE_WAIT 2 /* case is executing fmdo_close() */
#define FMD_CASE_CLOSED 3 /* case is closed (reconfig done) */
#define FMD_CASE_REPAIRED 4 /* case is repaired */
#define FMD_CASE_RESOLVED 5 /* case is resolved (can be freed) */
#define FMD_CF_DIRTY 0x01 /* case is in need of checkpoint */
#define FMD_CF_SOLVED 0x02 /* case has been solved */
#define FMD_CF_ISOLATED 0x04 /* case has been isolated */
#define FMD_CF_REPAIRED 0x08 /* case has been repaired */
#define FMD_CF_RESOLVED 0x10 /* case has been resolved */
#define FMD_TYPE_BOOL 0 /* int */
#define FMD_TYPE_INT32 1 /* int32_t */
#define FMD_TYPE_UINT32 2 /* uint32_t */
#define FMD_TYPE_INT64 3 /* int64_t */
#define FMD_TYPE_UINT64 4 /* uint64_t */
#define FMD_TYPE_TIME 5 /* uint64_t */
#define FMD_TYPE_SIZE 6 /* uint64_t */
typedef struct fmd_prop {
const char *fmdp_name; /* property name */
uint_t fmdp_type; /* property type (see above) */
const char *fmdp_defv; /* default value */
} fmd_prop_t;
typedef struct fmd_stat {
char fmds_name[32]; /* statistic name */
uint_t fmds_type; /* statistic type (see above) */
char fmds_desc[64]; /* statistic description */
union {
int bool; /* FMD_TYPE_BOOL */
int32_t i32; /* FMD_TYPE_INT32 */
uint32_t ui32; /* FMD_TYPE_UINT32 */
int64_t i64; /* FMD_TYPE_INT64 */
uint64_t ui64; /* FMD_TYPE_UINT64 */
} fmds_value;
} fmd_stat_t;
typedef struct fmd_hdl_ops {
void (*fmdo_recv)(fmd_hdl_t *, fmd_event_t *, nvlist_t *, const char *);
void (*fmdo_timeout)(fmd_hdl_t *, id_t, void *);
void (*fmdo_close)(fmd_hdl_t *, fmd_case_t *);
void (*fmdo_stats)(fmd_hdl_t *);
void (*fmdo_gc)(fmd_hdl_t *);
} fmd_hdl_ops_t;
#define FMD_SEND_SUCCESS 0 /* fmdo_send queued event */
#define FMD_SEND_FAILED 1 /* fmdo_send unrecoverable error */
#define FMD_SEND_RETRY 2 /* fmdo_send requests retry */
typedef struct fmd_hdl_info {
const char *fmdi_desc; /* fmd client description string */
const char *fmdi_vers; /* fmd client version string */
const fmd_hdl_ops_t *fmdi_ops; /* ops vector for client */
const fmd_prop_t *fmdi_props; /* array of configuration props */
} fmd_hdl_info_t;
extern int fmd_hdl_register(fmd_hdl_t *, int, const fmd_hdl_info_t *);
extern void fmd_hdl_unregister(fmd_hdl_t *);
extern void fmd_hdl_setspecific(fmd_hdl_t *, void *);
extern void *fmd_hdl_getspecific(fmd_hdl_t *);
#define FMD_SLEEP UMEM_NOFAIL
extern void *fmd_hdl_alloc(fmd_hdl_t *, size_t, int);
extern void *fmd_hdl_zalloc(fmd_hdl_t *, size_t, int);
extern void fmd_hdl_free(fmd_hdl_t *, void *, size_t);
extern char *fmd_hdl_strdup(fmd_hdl_t *, const char *, int);
extern void fmd_hdl_strfree(fmd_hdl_t *, char *);
extern void fmd_hdl_vdebug(fmd_hdl_t *, const char *, va_list);
extern void fmd_hdl_debug(fmd_hdl_t *, const char *, ...);
extern int32_t fmd_prop_get_int32(fmd_hdl_t *, const char *);
extern int64_t fmd_prop_get_int64(fmd_hdl_t *, const char *);
#define FMD_STAT_NOALLOC 0x0 /* fmd should use caller's memory */
#define FMD_STAT_ALLOC 0x1 /* fmd should allocate stats memory */
extern fmd_stat_t *fmd_stat_create(fmd_hdl_t *, uint_t, uint_t, fmd_stat_t *);
extern void fmd_stat_destroy(fmd_hdl_t *, uint_t, fmd_stat_t *);
extern void fmd_stat_setstr(fmd_hdl_t *, fmd_stat_t *, const char *);
extern fmd_case_t *fmd_case_open(fmd_hdl_t *, void *);
extern void fmd_case_reset(fmd_hdl_t *, fmd_case_t *);
extern void fmd_case_solve(fmd_hdl_t *, fmd_case_t *);
extern void fmd_case_close(fmd_hdl_t *, fmd_case_t *);
extern const char *fmd_case_uuid(fmd_hdl_t *, fmd_case_t *);
extern fmd_case_t *fmd_case_uulookup(fmd_hdl_t *, const char *);
extern void fmd_case_uuclose(fmd_hdl_t *, const char *);
extern int fmd_case_uuclosed(fmd_hdl_t *, const char *);
extern int fmd_case_uuisresolved(fmd_hdl_t *, const char *);
extern void fmd_case_uuresolved(fmd_hdl_t *, const char *);
extern int fmd_case_solved(fmd_hdl_t *, fmd_case_t *);
extern int fmd_case_closed(fmd_hdl_t *, fmd_case_t *);
extern void fmd_case_add_ereport(fmd_hdl_t *, fmd_case_t *, fmd_event_t *);
extern void fmd_case_add_serd(fmd_hdl_t *, fmd_case_t *, const char *);
extern void fmd_case_add_suspect(fmd_hdl_t *, fmd_case_t *, nvlist_t *);
extern void fmd_case_setspecific(fmd_hdl_t *, fmd_case_t *, void *);
extern void *fmd_case_getspecific(fmd_hdl_t *, fmd_case_t *);
extern fmd_case_t *fmd_case_next(fmd_hdl_t *, fmd_case_t *);
extern fmd_case_t *fmd_case_prev(fmd_hdl_t *, fmd_case_t *);
extern void fmd_buf_create(fmd_hdl_t *, fmd_case_t *, const char *, size_t);
extern void fmd_buf_destroy(fmd_hdl_t *, fmd_case_t *, const char *);
extern void fmd_buf_read(fmd_hdl_t *, fmd_case_t *,
const char *, void *, size_t);
extern void fmd_buf_write(fmd_hdl_t *, fmd_case_t *,
const char *, const void *, size_t);
extern size_t fmd_buf_size(fmd_hdl_t *, fmd_case_t *, const char *);
extern void fmd_serd_create(fmd_hdl_t *, const char *, uint_t, hrtime_t);
extern void fmd_serd_destroy(fmd_hdl_t *, const char *);
extern int fmd_serd_exists(fmd_hdl_t *, const char *);
extern void fmd_serd_reset(fmd_hdl_t *, const char *);
extern int fmd_serd_record(fmd_hdl_t *, const char *, fmd_event_t *);
extern int fmd_serd_fired(fmd_hdl_t *, const char *);
extern int fmd_serd_empty(fmd_hdl_t *, const char *);
extern id_t fmd_timer_install(fmd_hdl_t *, void *, fmd_event_t *, hrtime_t);
extern void fmd_timer_remove(fmd_hdl_t *, id_t);
extern nvlist_t *fmd_nvl_create_fault(fmd_hdl_t *,
const char *, uint8_t, nvlist_t *, nvlist_t *, nvlist_t *);
extern int fmd_nvl_class_match(fmd_hdl_t *, nvlist_t *, const char *);
#define FMD_HAS_FAULT_FRU 0
#define FMD_HAS_FAULT_ASRU 1
#define FMD_HAS_FAULT_RESOURCE 2
extern void fmd_repair_fru(fmd_hdl_t *, const char *);
extern int fmd_repair_asru(fmd_hdl_t *, const char *);
extern nvlist_t *fmd_nvl_alloc(fmd_hdl_t *, int);
extern nvlist_t *fmd_nvl_dup(fmd_hdl_t *, nvlist_t *, int);
/*
* ZED Specific Interfaces
*/
extern fmd_hdl_t *fmd_module_hdl(const char *);
extern boolean_t fmd_module_initialized(fmd_hdl_t *);
extern void fmd_module_recv(fmd_hdl_t *, nvlist_t *, const char *);
/* ZFS FMA Retire Agent */
extern void _zfs_retire_init(fmd_hdl_t *);
extern void _zfs_retire_fini(fmd_hdl_t *);
/* ZFS FMA Diagnosis Engine */
extern void _zfs_diagnosis_init(fmd_hdl_t *);
extern void _zfs_diagnosis_fini(fmd_hdl_t *);
#ifdef __cplusplus
}
#endif
#endif /* _FMD_API_H */

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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2016, Intel Corporation.
*/
#include <assert.h>
#include <stddef.h>
#include <stdlib.h>
#include <strings.h>
#include <sys/list.h>
#include <sys/time.h>
#include "fmd_api.h"
#include "fmd_serd.h"
#include "../zed_log.h"
#define FMD_STR_BUCKETS 211
#ifdef SERD_ENG_DEBUG
#define serd_log_msg(fmt, ...) \
zed_log_msg(LOG_INFO, fmt, __VA_ARGS__)
#else
#define serd_log_msg(fmt, ...)
#endif
/*
* SERD Engine Backend
*/
/*
* Compute the delta between events in nanoseconds. To account for very old
* events which are replayed, we must handle the case where time is negative.
* We convert the hrtime_t's to unsigned 64-bit integers and then handle the
* case where 'old' is greater than 'new' (i.e. high-res time has wrapped).
*/
static hrtime_t
fmd_event_delta(hrtime_t t1, hrtime_t t2)
{
uint64_t old = t1;
uint64_t new = t2;
return (new >= old ? new - old : (UINT64_MAX - old) + new + 1);
}
static fmd_serd_eng_t *
fmd_serd_eng_alloc(const char *name, uint64_t n, hrtime_t t)
{
fmd_serd_eng_t *sgp;
sgp = malloc(sizeof (fmd_serd_eng_t));
bzero(sgp, sizeof (fmd_serd_eng_t));
sgp->sg_name = strdup(name);
sgp->sg_flags = FMD_SERD_DIRTY;
sgp->sg_n = n;
sgp->sg_t = t;
list_create(&sgp->sg_list, sizeof (fmd_serd_elem_t),
offsetof(fmd_serd_elem_t, se_list));
return (sgp);
}
static void
fmd_serd_eng_free(fmd_serd_eng_t *sgp)
{
fmd_serd_eng_reset(sgp);
free(sgp->sg_name);
list_destroy(&sgp->sg_list);
free(sgp);
}
/*
* sourced from fmd_string.c
*/
static ulong_t
fmd_strhash(const char *key)
{
ulong_t g, h = 0;
const char *p;
for (p = key; *p != '\0'; p++) {
h = (h << 4) + *p;
if ((g = (h & 0xf0000000)) != 0) {
h ^= (g >> 24);
h ^= g;
}
}
return (h);
}
void
fmd_serd_hash_create(fmd_serd_hash_t *shp)
{
shp->sh_hashlen = FMD_STR_BUCKETS;
shp->sh_hash = calloc(shp->sh_hashlen, sizeof (void *));
shp->sh_count = 0;
}
void
fmd_serd_hash_destroy(fmd_serd_hash_t *shp)
{
fmd_serd_eng_t *sgp, *ngp;
uint_t i;
for (i = 0; i < shp->sh_hashlen; i++) {
for (sgp = shp->sh_hash[i]; sgp != NULL; sgp = ngp) {
ngp = sgp->sg_next;
fmd_serd_eng_free(sgp);
}
}
free(shp->sh_hash);
bzero(shp, sizeof (fmd_serd_hash_t));
}
void
fmd_serd_hash_apply(fmd_serd_hash_t *shp, fmd_serd_eng_f *func, void *arg)
{
fmd_serd_eng_t *sgp;
uint_t i;
for (i = 0; i < shp->sh_hashlen; i++) {
for (sgp = shp->sh_hash[i]; sgp != NULL; sgp = sgp->sg_next)
func(sgp, arg);
}
}
fmd_serd_eng_t *
fmd_serd_eng_insert(fmd_serd_hash_t *shp, const char *name,
uint_t n, hrtime_t t)
{
uint_t h = fmd_strhash(name) % shp->sh_hashlen;
fmd_serd_eng_t *sgp = fmd_serd_eng_alloc(name, n, t);
serd_log_msg(" SERD Engine: inserting %s N %d T %llu",
name, (int)n, (long long unsigned)t);
sgp->sg_next = shp->sh_hash[h];
shp->sh_hash[h] = sgp;
shp->sh_count++;
return (sgp);
}
fmd_serd_eng_t *
fmd_serd_eng_lookup(fmd_serd_hash_t *shp, const char *name)
{
uint_t h = fmd_strhash(name) % shp->sh_hashlen;
fmd_serd_eng_t *sgp;
for (sgp = shp->sh_hash[h]; sgp != NULL; sgp = sgp->sg_next) {
if (strcmp(name, sgp->sg_name) == 0)
return (sgp);
}
return (NULL);
}
void
fmd_serd_eng_delete(fmd_serd_hash_t *shp, const char *name)
{
uint_t h = fmd_strhash(name) % shp->sh_hashlen;
fmd_serd_eng_t *sgp, **pp = &shp->sh_hash[h];
serd_log_msg(" SERD Engine: deleting %s", name);
for (sgp = *pp; sgp != NULL; sgp = sgp->sg_next) {
if (strcmp(sgp->sg_name, name) != 0)
pp = &sgp->sg_next;
else
break;
}
if (sgp != NULL) {
*pp = sgp->sg_next;
fmd_serd_eng_free(sgp);
assert(shp->sh_count != 0);
shp->sh_count--;
}
}
static void
fmd_serd_eng_discard(fmd_serd_eng_t *sgp, fmd_serd_elem_t *sep)
{
list_remove(&sgp->sg_list, sep);
sgp->sg_count--;
serd_log_msg(" SERD Engine: discarding %s, %d remaining",
sgp->sg_name, (int)sgp->sg_count);
free(sep);
}
int
fmd_serd_eng_record(fmd_serd_eng_t *sgp, hrtime_t hrt)
{
fmd_serd_elem_t *sep, *oep;
/*
* If the fired flag is already set, return false and discard the
* event. This means that the caller will only see the engine "fire"
* once until fmd_serd_eng_reset() is called. The fmd_serd_eng_fired()
* function can also be used in combination with fmd_serd_eng_record().
*/
if (sgp->sg_flags & FMD_SERD_FIRED) {
serd_log_msg(" SERD Engine: record %s already fired!",
sgp->sg_name);
return (FMD_B_FALSE);
}
while (sgp->sg_count >= sgp->sg_n)
fmd_serd_eng_discard(sgp, list_tail(&sgp->sg_list));
sep = malloc(sizeof (fmd_serd_elem_t));
sep->se_hrt = hrt;
list_insert_head(&sgp->sg_list, sep);
sgp->sg_count++;
serd_log_msg(" SERD Engine: recording %s of %d (%llu)",
sgp->sg_name, (int)sgp->sg_count, (long long unsigned)hrt);
/*
* Pick up the oldest element pointer for comparison to 'sep'. We must
* do this after adding 'sep' because 'oep' and 'sep' can be the same.
*/
oep = list_tail(&sgp->sg_list);
if (sgp->sg_count >= sgp->sg_n &&
fmd_event_delta(oep->se_hrt, sep->se_hrt) <= sgp->sg_t) {
sgp->sg_flags |= FMD_SERD_FIRED | FMD_SERD_DIRTY;
serd_log_msg(" SERD Engine: fired %s", sgp->sg_name);
return (FMD_B_TRUE);
}
sgp->sg_flags |= FMD_SERD_DIRTY;
return (FMD_B_FALSE);
}
int
fmd_serd_eng_fired(fmd_serd_eng_t *sgp)
{
return (sgp->sg_flags & FMD_SERD_FIRED);
}
int
fmd_serd_eng_empty(fmd_serd_eng_t *sgp)
{
return (sgp->sg_count == 0);
}
void
fmd_serd_eng_reset(fmd_serd_eng_t *sgp)
{
serd_log_msg(" SERD Engine: resetting %s", sgp->sg_name);
while (sgp->sg_count != 0)
fmd_serd_eng_discard(sgp, list_head(&sgp->sg_list));
sgp->sg_flags &= ~FMD_SERD_FIRED;
sgp->sg_flags |= FMD_SERD_DIRTY;
}
void
fmd_serd_eng_gc(fmd_serd_eng_t *sgp)
{
fmd_serd_elem_t *sep, *nep;
hrtime_t hrt;
if (sgp->sg_count == 0 || (sgp->sg_flags & FMD_SERD_FIRED))
return; /* no garbage collection needed if empty or fired */
sep = list_head(&sgp->sg_list);
if (sep == NULL)
return;
hrt = sep->se_hrt - sgp->sg_t;
for (sep = list_head(&sgp->sg_list); sep != NULL; sep = nep) {
if (sep->se_hrt >= hrt)
break; /* sep and subsequent events are all within T */
nep = list_next(&sgp->sg_list, sep);
fmd_serd_eng_discard(sgp, sep);
sgp->sg_flags |= FMD_SERD_DIRTY;
}
}

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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2016, Intel Corporation.
*/
#ifndef _FMD_SERD_H
#define _FMD_SERD_H
#ifdef __cplusplus
extern "C" {
#endif
#include <sys/list.h>
#include <sys/time.h>
typedef struct fmd_serd_elem {
list_node_t se_list; /* linked list forward/back pointers */
hrtime_t se_hrt; /* upper bound on event hrtime */
} fmd_serd_elem_t;
typedef struct fmd_serd_eng {
char *sg_name; /* string name for this engine */
struct fmd_serd_eng *sg_next; /* next engine on hash chain */
list_t sg_list; /* list of fmd_serd_elem_t's */
uint_t sg_count; /* count of events in sg_list */
uint_t sg_flags; /* engine flags (see below) */
uint_t sg_n; /* engine N parameter (event count) */
hrtime_t sg_t; /* engine T parameter (nanoseconds) */
} fmd_serd_eng_t;
#define FMD_SERD_FIRED 0x1 /* error rate has exceeded threshold */
#define FMD_SERD_DIRTY 0x2 /* engine needs to be checkpointed */
typedef void fmd_serd_eng_f(fmd_serd_eng_t *, void *);
typedef struct fmd_serd_hash {
fmd_serd_eng_t **sh_hash; /* hash bucket array for buffers */
uint_t sh_hashlen; /* length of hash bucket array */
uint_t sh_count; /* count of engines in hash */
} fmd_serd_hash_t;
extern void fmd_serd_hash_create(fmd_serd_hash_t *);
extern void fmd_serd_hash_destroy(fmd_serd_hash_t *);
extern void fmd_serd_hash_apply(fmd_serd_hash_t *, fmd_serd_eng_f *, void *);
extern fmd_serd_eng_t *fmd_serd_eng_insert(fmd_serd_hash_t *,
const char *, uint32_t, hrtime_t);
extern fmd_serd_eng_t *fmd_serd_eng_lookup(fmd_serd_hash_t *, const char *);
extern void fmd_serd_eng_delete(fmd_serd_hash_t *, const char *);
extern int fmd_serd_eng_record(fmd_serd_eng_t *, hrtime_t);
extern int fmd_serd_eng_fired(fmd_serd_eng_t *);
extern int fmd_serd_eng_empty(fmd_serd_eng_t *);
extern void fmd_serd_eng_reset(fmd_serd_eng_t *);
extern void fmd_serd_eng_gc(fmd_serd_eng_t *);
#ifdef __cplusplus
}
#endif
#endif /* _FMD_SERD_H */

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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License Version 1.0 (CDDL-1.0).
* You can obtain a copy of the license from the top-level file
* "OPENSOLARIS.LICENSE" or at <http://opensource.org/licenses/CDDL-1.0>.
* You may not use this file except in compliance with the license.
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2016, Intel Corporation.
* Copyright (c) 2018, loli10K <ezomori.nozomu@gmail.com>
*/
#include <libnvpair.h>
#include <libzfs.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <sys/list.h>
#include <sys/time.h>
#include <sys/sysevent/eventdefs.h>
#include <sys/sysevent/dev.h>
#include <sys/fm/protocol.h>
#include <sys/fm/fs/zfs.h>
#include <pthread.h>
#include <unistd.h>
#include "zfs_agents.h"
#include "fmd_api.h"
#include "../zed_log.h"
/*
* agent dispatch code
*/
static pthread_mutex_t agent_lock = PTHREAD_MUTEX_INITIALIZER;
static pthread_cond_t agent_cond = PTHREAD_COND_INITIALIZER;
static list_t agent_events; /* list of pending events */
static int agent_exiting;
typedef struct agent_event {
char ae_class[64];
char ae_subclass[32];
nvlist_t *ae_nvl;
list_node_t ae_node;
} agent_event_t;
pthread_t g_agents_tid;
libzfs_handle_t *g_zfs_hdl;
/* guid search data */
typedef enum device_type {
DEVICE_TYPE_L2ARC, /* l2arc device */
DEVICE_TYPE_SPARE, /* spare device */
DEVICE_TYPE_PRIMARY /* any primary pool storage device */
} device_type_t;
typedef struct guid_search {
uint64_t gs_pool_guid;
uint64_t gs_vdev_guid;
char *gs_devid;
device_type_t gs_vdev_type;
uint64_t gs_vdev_expandtime; /* vdev expansion time */
} guid_search_t;
/*
* Walks the vdev tree recursively looking for a matching devid.
* Returns B_TRUE as soon as a matching device is found, B_FALSE otherwise.
*/
static boolean_t
zfs_agent_iter_vdev(zpool_handle_t *zhp, nvlist_t *nvl, void *arg)
{
guid_search_t *gsp = arg;
char *path = NULL;
uint_t c, children;
nvlist_t **child;
/*
* First iterate over any children.
*/
if (nvlist_lookup_nvlist_array(nvl, ZPOOL_CONFIG_CHILDREN,
&child, &children) == 0) {
for (c = 0; c < children; c++) {
if (zfs_agent_iter_vdev(zhp, child[c], gsp)) {
gsp->gs_vdev_type = DEVICE_TYPE_PRIMARY;
return (B_TRUE);
}
}
}
/*
* Iterate over any spares and cache devices
*/
if (nvlist_lookup_nvlist_array(nvl, ZPOOL_CONFIG_SPARES,
&child, &children) == 0) {
for (c = 0; c < children; c++) {
if (zfs_agent_iter_vdev(zhp, child[c], gsp)) {
gsp->gs_vdev_type = DEVICE_TYPE_L2ARC;
return (B_TRUE);
}
}
}
if (nvlist_lookup_nvlist_array(nvl, ZPOOL_CONFIG_L2CACHE,
&child, &children) == 0) {
for (c = 0; c < children; c++) {
if (zfs_agent_iter_vdev(zhp, child[c], gsp)) {
gsp->gs_vdev_type = DEVICE_TYPE_SPARE;
return (B_TRUE);
}
}
}
/*
* On a devid match, grab the vdev guid and expansion time, if any.
*/
if (gsp->gs_devid != NULL &&
(nvlist_lookup_string(nvl, ZPOOL_CONFIG_DEVID, &path) == 0) &&
(strcmp(gsp->gs_devid, path) == 0)) {
(void) nvlist_lookup_uint64(nvl, ZPOOL_CONFIG_GUID,
&gsp->gs_vdev_guid);
(void) nvlist_lookup_uint64(nvl, ZPOOL_CONFIG_EXPANSION_TIME,
&gsp->gs_vdev_expandtime);
return (B_TRUE);
}
return (B_FALSE);
}
static int
zfs_agent_iter_pool(zpool_handle_t *zhp, void *arg)
{
guid_search_t *gsp = arg;
nvlist_t *config, *nvl;
/*
* For each vdev in this pool, look for a match by devid
*/
if ((config = zpool_get_config(zhp, NULL)) != NULL) {
if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
&nvl) == 0) {
(void) zfs_agent_iter_vdev(zhp, nvl, gsp);
}
}
/*
* if a match was found then grab the pool guid
*/
if (gsp->gs_vdev_guid) {
(void) nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID,
&gsp->gs_pool_guid);
}
zpool_close(zhp);
return (gsp->gs_vdev_guid != 0);
}
void
zfs_agent_post_event(const char *class, const char *subclass, nvlist_t *nvl)
{
agent_event_t *event;
if (subclass == NULL)
subclass = "";
event = malloc(sizeof (agent_event_t));
if (event == NULL || nvlist_dup(nvl, &event->ae_nvl, 0) != 0) {
if (event)
free(event);
return;
}
if (strcmp(class, "sysevent.fs.zfs.vdev_check") == 0) {
class = EC_ZFS;
subclass = ESC_ZFS_VDEV_CHECK;
}
/*
* On Linux, we don't get the expected FM_RESOURCE_REMOVED ereport
* from the vdev_disk layer after a hot unplug. Fortunately we do
* get an EC_DEV_REMOVE from our disk monitor and it is a suitable
* proxy so we remap it here for the benefit of the diagnosis engine.
*/
if ((strcmp(class, EC_DEV_REMOVE) == 0) &&
(strcmp(subclass, ESC_DISK) == 0) &&
(nvlist_exists(nvl, ZFS_EV_VDEV_GUID) ||
nvlist_exists(nvl, DEV_IDENTIFIER))) {
nvlist_t *payload = event->ae_nvl;
struct timeval tv;
int64_t tod[2];
uint64_t pool_guid = 0, vdev_guid = 0;
guid_search_t search = { 0 };
device_type_t devtype = DEVICE_TYPE_PRIMARY;
class = "resource.fs.zfs.removed";
subclass = "";
(void) nvlist_add_string(payload, FM_CLASS, class);
(void) nvlist_lookup_uint64(nvl, ZFS_EV_POOL_GUID, &pool_guid);
(void) nvlist_lookup_uint64(nvl, ZFS_EV_VDEV_GUID, &vdev_guid);
(void) gettimeofday(&tv, NULL);
tod[0] = tv.tv_sec;
tod[1] = tv.tv_usec;
(void) nvlist_add_int64_array(payload, FM_EREPORT_TIME, tod, 2);
/*
* For multipath, spare and l2arc devices ZFS_EV_VDEV_GUID or
* ZFS_EV_POOL_GUID may be missing so find them.
*/
(void) nvlist_lookup_string(nvl, DEV_IDENTIFIER,
&search.gs_devid);
(void) zpool_iter(g_zfs_hdl, zfs_agent_iter_pool, &search);
pool_guid = search.gs_pool_guid;
vdev_guid = search.gs_vdev_guid;
devtype = search.gs_vdev_type;
/*
* We want to avoid reporting "remove" events coming from
* libudev for VDEVs which were expanded recently (10s) and
* avoid activating spares in response to partitions being
* deleted and created in rapid succession.
*/
if (search.gs_vdev_expandtime != 0 &&
search.gs_vdev_expandtime + 10 > tv.tv_sec) {
zed_log_msg(LOG_INFO, "agent post event: ignoring '%s' "
"for recently expanded device '%s'", EC_DEV_REMOVE,
search.gs_devid);
goto out;
}
(void) nvlist_add_uint64(payload,
FM_EREPORT_PAYLOAD_ZFS_POOL_GUID, pool_guid);
(void) nvlist_add_uint64(payload,
FM_EREPORT_PAYLOAD_ZFS_VDEV_GUID, vdev_guid);
switch (devtype) {
case DEVICE_TYPE_L2ARC:
(void) nvlist_add_string(payload,
FM_EREPORT_PAYLOAD_ZFS_VDEV_TYPE,
VDEV_TYPE_L2CACHE);
break;
case DEVICE_TYPE_SPARE:
(void) nvlist_add_string(payload,
FM_EREPORT_PAYLOAD_ZFS_VDEV_TYPE, VDEV_TYPE_SPARE);
break;
case DEVICE_TYPE_PRIMARY:
(void) nvlist_add_string(payload,
FM_EREPORT_PAYLOAD_ZFS_VDEV_TYPE, VDEV_TYPE_DISK);
break;
}
zed_log_msg(LOG_INFO, "agent post event: mapping '%s' to '%s'",
EC_DEV_REMOVE, class);
}
(void) strlcpy(event->ae_class, class, sizeof (event->ae_class));
(void) strlcpy(event->ae_subclass, subclass,
sizeof (event->ae_subclass));
(void) pthread_mutex_lock(&agent_lock);
list_insert_tail(&agent_events, event);
(void) pthread_mutex_unlock(&agent_lock);
out:
(void) pthread_cond_signal(&agent_cond);
}
static void
zfs_agent_dispatch(const char *class, const char *subclass, nvlist_t *nvl)
{
/*
* The diagnosis engine subscribes to the following events.
* On illumos these subscriptions reside in:
* /usr/lib/fm/fmd/plugins/zfs-diagnosis.conf
*/
if (strstr(class, "ereport.fs.zfs.") != NULL ||
strstr(class, "resource.fs.zfs.") != NULL ||
strcmp(class, "sysevent.fs.zfs.vdev_remove") == 0 ||
strcmp(class, "sysevent.fs.zfs.vdev_remove_dev") == 0 ||
strcmp(class, "sysevent.fs.zfs.pool_destroy") == 0) {
fmd_module_recv(fmd_module_hdl("zfs-diagnosis"), nvl, class);
}
/*
* The retire agent subscribes to the following events.
* On illumos these subscriptions reside in:
* /usr/lib/fm/fmd/plugins/zfs-retire.conf
*
* NOTE: faults events come directly from our diagnosis engine
* and will not pass through the zfs kernel module.
*/
if (strcmp(class, FM_LIST_SUSPECT_CLASS) == 0 ||
strcmp(class, "resource.fs.zfs.removed") == 0 ||
strcmp(class, "resource.fs.zfs.statechange") == 0 ||
strcmp(class, "sysevent.fs.zfs.vdev_remove") == 0) {
fmd_module_recv(fmd_module_hdl("zfs-retire"), nvl, class);
}
/*
* The SLM module only consumes disk events and vdev check events
*
* NOTE: disk events come directly from disk monitor and will
* not pass through the zfs kernel module.
*/
if (strstr(class, "EC_dev_") != NULL ||
strcmp(class, EC_ZFS) == 0) {
(void) zfs_slm_event(class, subclass, nvl);
}
}
/*
* Events are consumed and dispatched from this thread
* An agent can also post an event so event list lock
* is not held when calling an agent.
* One event is consumed at a time.
*/
static void *
zfs_agent_consumer_thread(void *arg)
{
for (;;) {
agent_event_t *event;
(void) pthread_mutex_lock(&agent_lock);
/* wait for an event to show up */
while (!agent_exiting && list_is_empty(&agent_events))
(void) pthread_cond_wait(&agent_cond, &agent_lock);
if (agent_exiting) {
(void) pthread_mutex_unlock(&agent_lock);
zed_log_msg(LOG_INFO, "zfs_agent_consumer_thread: "
"exiting");
return (NULL);
}
if ((event = (list_head(&agent_events))) != NULL) {
list_remove(&agent_events, event);
(void) pthread_mutex_unlock(&agent_lock);
/* dispatch to all event subscribers */
zfs_agent_dispatch(event->ae_class, event->ae_subclass,
event->ae_nvl);
nvlist_free(event->ae_nvl);
free(event);
continue;
}
(void) pthread_mutex_unlock(&agent_lock);
}
return (NULL);
}
void
zfs_agent_init(libzfs_handle_t *zfs_hdl)
{
fmd_hdl_t *hdl;
g_zfs_hdl = zfs_hdl;
if (zfs_slm_init() != 0)
zed_log_die("Failed to initialize zfs slm");
zed_log_msg(LOG_INFO, "Add Agent: init");
hdl = fmd_module_hdl("zfs-diagnosis");
_zfs_diagnosis_init(hdl);
if (!fmd_module_initialized(hdl))
zed_log_die("Failed to initialize zfs diagnosis");
hdl = fmd_module_hdl("zfs-retire");
_zfs_retire_init(hdl);
if (!fmd_module_initialized(hdl))
zed_log_die("Failed to initialize zfs retire");
list_create(&agent_events, sizeof (agent_event_t),
offsetof(struct agent_event, ae_node));
if (pthread_create(&g_agents_tid, NULL, zfs_agent_consumer_thread,
NULL) != 0) {
list_destroy(&agent_events);
zed_log_die("Failed to initialize agents");
}
}
void
zfs_agent_fini(void)
{
fmd_hdl_t *hdl;
agent_event_t *event;
agent_exiting = 1;
(void) pthread_cond_signal(&agent_cond);
/* wait for zfs_enum_pools thread to complete */
(void) pthread_join(g_agents_tid, NULL);
/* drain any pending events */
while ((event = (list_head(&agent_events))) != NULL) {
list_remove(&agent_events, event);
nvlist_free(event->ae_nvl);
free(event);
}
list_destroy(&agent_events);
if ((hdl = fmd_module_hdl("zfs-retire")) != NULL) {
_zfs_retire_fini(hdl);
fmd_hdl_unregister(hdl);
}
if ((hdl = fmd_module_hdl("zfs-diagnosis")) != NULL) {
_zfs_diagnosis_fini(hdl);
fmd_hdl_unregister(hdl);
}
zed_log_msg(LOG_INFO, "Add Agent: fini");
zfs_slm_fini();
g_zfs_hdl = NULL;
}

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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License Version 1.0 (CDDL-1.0).
* You can obtain a copy of the license from the top-level file
* "OPENSOLARIS.LICENSE" or at <http://opensource.org/licenses/CDDL-1.0>.
* You may not use this file except in compliance with the license.
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2016, Intel Corporation.
*/
#ifndef ZFS_AGENTS_H
#define ZFS_AGENTS_H
#include <libzfs.h>
#include <libnvpair.h>
#ifdef __cplusplus
extern "C" {
#endif
/*
* Agent abstraction presented to ZED
*/
extern void zfs_agent_init(libzfs_handle_t *);
extern void zfs_agent_fini(void);
extern void zfs_agent_post_event(const char *, const char *, nvlist_t *);
/*
* ZFS Sysevent Linkable Module (SLM)
*/
extern int zfs_slm_init(void);
extern void zfs_slm_fini(void);
extern void zfs_slm_event(const char *, const char *, nvlist_t *);
#ifdef __cplusplus
}
#endif
#endif /* !ZFS_AGENTS_H */

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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright 2015 Nexenta Systems, Inc. All rights reserved.
* Copyright (c) 2016, Intel Corporation.
*/
#include <stddef.h>
#include <string.h>
#include <strings.h>
#include <libuutil.h>
#include <libzfs.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/fs/zfs.h>
#include <sys/fm/protocol.h>
#include <sys/fm/fs/zfs.h>
#include "zfs_agents.h"
#include "fmd_api.h"
/*
* Our serd engines are named 'zfs_<pool_guid>_<vdev_guid>_{checksum,io}'. This
* #define reserves enough space for two 64-bit hex values plus the length of
* the longest string.
*/
#define MAX_SERDLEN (16 * 2 + sizeof ("zfs___checksum"))
/*
* On-disk case structure. This must maintain backwards compatibility with
* previous versions of the DE. By default, any members appended to the end
* will be filled with zeros if they don't exist in a previous version.
*/
typedef struct zfs_case_data {
uint64_t zc_version;
uint64_t zc_ena;
uint64_t zc_pool_guid;
uint64_t zc_vdev_guid;
int zc_pool_state;
char zc_serd_checksum[MAX_SERDLEN];
char zc_serd_io[MAX_SERDLEN];
int zc_has_remove_timer;
} zfs_case_data_t;
/*
* Time-of-day
*/
typedef struct er_timeval {
uint64_t ertv_sec;
uint64_t ertv_nsec;
} er_timeval_t;
/*
* In-core case structure.
*/
typedef struct zfs_case {
boolean_t zc_present;
uint32_t zc_version;
zfs_case_data_t zc_data;
fmd_case_t *zc_case;
uu_list_node_t zc_node;
id_t zc_remove_timer;
char *zc_fru;
er_timeval_t zc_when;
} zfs_case_t;
#define CASE_DATA "data"
#define CASE_FRU "fru"
#define CASE_DATA_VERSION_INITIAL 1
#define CASE_DATA_VERSION_SERD 2
typedef struct zfs_de_stats {
fmd_stat_t old_drops;
fmd_stat_t dev_drops;
fmd_stat_t vdev_drops;
fmd_stat_t import_drops;
fmd_stat_t resource_drops;
} zfs_de_stats_t;
zfs_de_stats_t zfs_stats = {
{ "old_drops", FMD_TYPE_UINT64, "ereports dropped (from before load)" },
{ "dev_drops", FMD_TYPE_UINT64, "ereports dropped (dev during open)"},
{ "vdev_drops", FMD_TYPE_UINT64, "ereports dropped (weird vdev types)"},
{ "import_drops", FMD_TYPE_UINT64, "ereports dropped (during import)" },
{ "resource_drops", FMD_TYPE_UINT64, "resource related ereports" }
};
static hrtime_t zfs_remove_timeout;
uu_list_pool_t *zfs_case_pool;
uu_list_t *zfs_cases;
#define ZFS_MAKE_RSRC(type) \
FM_RSRC_CLASS "." ZFS_ERROR_CLASS "." type
#define ZFS_MAKE_EREPORT(type) \
FM_EREPORT_CLASS "." ZFS_ERROR_CLASS "." type
/*
* Write out the persistent representation of an active case.
*/
static void
zfs_case_serialize(fmd_hdl_t *hdl, zfs_case_t *zcp)
{
zcp->zc_data.zc_version = CASE_DATA_VERSION_SERD;
}
/*
* Read back the persistent representation of an active case.
*/
static zfs_case_t *
zfs_case_unserialize(fmd_hdl_t *hdl, fmd_case_t *cp)
{
zfs_case_t *zcp;
zcp = fmd_hdl_zalloc(hdl, sizeof (zfs_case_t), FMD_SLEEP);
zcp->zc_case = cp;
fmd_buf_read(hdl, cp, CASE_DATA, &zcp->zc_data,
sizeof (zcp->zc_data));
if (zcp->zc_data.zc_version > CASE_DATA_VERSION_SERD) {
fmd_hdl_free(hdl, zcp, sizeof (zfs_case_t));
return (NULL);
}
/*
* fmd_buf_read() will have already zeroed out the remainder of the
* buffer, so we don't have to do anything special if the version
* doesn't include the SERD engine name.
*/
if (zcp->zc_data.zc_has_remove_timer)
zcp->zc_remove_timer = fmd_timer_install(hdl, zcp,
NULL, zfs_remove_timeout);
uu_list_node_init(zcp, &zcp->zc_node, zfs_case_pool);
(void) uu_list_insert_before(zfs_cases, NULL, zcp);
fmd_case_setspecific(hdl, cp, zcp);
return (zcp);
}
/*
* Iterate over any active cases. If any cases are associated with a pool or
* vdev which is no longer present on the system, close the associated case.
*/
static void
zfs_mark_vdev(uint64_t pool_guid, nvlist_t *vd, er_timeval_t *loaded)
{
uint64_t vdev_guid = 0;
uint_t c, children;
nvlist_t **child;
zfs_case_t *zcp;
(void) nvlist_lookup_uint64(vd, ZPOOL_CONFIG_GUID, &vdev_guid);
/*
* Mark any cases associated with this (pool, vdev) pair.
*/
for (zcp = uu_list_first(zfs_cases); zcp != NULL;
zcp = uu_list_next(zfs_cases, zcp)) {
if (zcp->zc_data.zc_pool_guid == pool_guid &&
zcp->zc_data.zc_vdev_guid == vdev_guid) {
zcp->zc_present = B_TRUE;
zcp->zc_when = *loaded;
}
}
/*
* Iterate over all children.
*/
if (nvlist_lookup_nvlist_array(vd, ZPOOL_CONFIG_CHILDREN, &child,
&children) == 0) {
for (c = 0; c < children; c++)
zfs_mark_vdev(pool_guid, child[c], loaded);
}
if (nvlist_lookup_nvlist_array(vd, ZPOOL_CONFIG_L2CACHE, &child,
&children) == 0) {
for (c = 0; c < children; c++)
zfs_mark_vdev(pool_guid, child[c], loaded);
}
if (nvlist_lookup_nvlist_array(vd, ZPOOL_CONFIG_SPARES, &child,
&children) == 0) {
for (c = 0; c < children; c++)
zfs_mark_vdev(pool_guid, child[c], loaded);
}
}
/*ARGSUSED*/
static int
zfs_mark_pool(zpool_handle_t *zhp, void *unused)
{
zfs_case_t *zcp;
uint64_t pool_guid;
uint64_t *tod;
er_timeval_t loaded = { 0 };
nvlist_t *config, *vd;
uint_t nelem = 0;
int ret;
pool_guid = zpool_get_prop_int(zhp, ZPOOL_PROP_GUID, NULL);
/*
* Mark any cases associated with just this pool.
*/
for (zcp = uu_list_first(zfs_cases); zcp != NULL;
zcp = uu_list_next(zfs_cases, zcp)) {
if (zcp->zc_data.zc_pool_guid == pool_guid &&
zcp->zc_data.zc_vdev_guid == 0)
zcp->zc_present = B_TRUE;
}
if ((config = zpool_get_config(zhp, NULL)) == NULL) {
zpool_close(zhp);
return (-1);
}
(void) nvlist_lookup_uint64_array(config, ZPOOL_CONFIG_LOADED_TIME,
&tod, &nelem);
if (nelem == 2) {
loaded.ertv_sec = tod[0];
loaded.ertv_nsec = tod[1];
for (zcp = uu_list_first(zfs_cases); zcp != NULL;
zcp = uu_list_next(zfs_cases, zcp)) {
if (zcp->zc_data.zc_pool_guid == pool_guid &&
zcp->zc_data.zc_vdev_guid == 0) {
zcp->zc_when = loaded;
}
}
}
ret = nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, &vd);
if (ret) {
zpool_close(zhp);
return (-1);
}
zfs_mark_vdev(pool_guid, vd, &loaded);
zpool_close(zhp);
return (0);
}
struct load_time_arg {
uint64_t lt_guid;
er_timeval_t *lt_time;
boolean_t lt_found;
};
static int
zpool_find_load_time(zpool_handle_t *zhp, void *arg)
{
struct load_time_arg *lta = arg;
uint64_t pool_guid;
uint64_t *tod;
nvlist_t *config;
uint_t nelem;
if (lta->lt_found) {
zpool_close(zhp);
return (0);
}
pool_guid = zpool_get_prop_int(zhp, ZPOOL_PROP_GUID, NULL);
if (pool_guid != lta->lt_guid) {
zpool_close(zhp);
return (0);
}
if ((config = zpool_get_config(zhp, NULL)) == NULL) {
zpool_close(zhp);
return (-1);
}
if (nvlist_lookup_uint64_array(config, ZPOOL_CONFIG_LOADED_TIME,
&tod, &nelem) == 0 && nelem == 2) {
lta->lt_found = B_TRUE;
lta->lt_time->ertv_sec = tod[0];
lta->lt_time->ertv_nsec = tod[1];
}
zpool_close(zhp);
return (0);
}
static void
zfs_purge_cases(fmd_hdl_t *hdl)
{
zfs_case_t *zcp;
uu_list_walk_t *walk;
libzfs_handle_t *zhdl = fmd_hdl_getspecific(hdl);
/*
* There is no way to open a pool by GUID, or lookup a vdev by GUID. No
* matter what we do, we're going to have to stomach an O(vdevs * cases)
* algorithm. In reality, both quantities are likely so small that
* neither will matter. Given that iterating over pools is more
* expensive than iterating over the in-memory case list, we opt for a
* 'present' flag in each case that starts off cleared. We then iterate
* over all pools, marking those that are still present, and removing
* those that aren't found.
*
* Note that we could also construct an FMRI and rely on
* fmd_nvl_fmri_present(), but this would end up doing the same search.
*/
/*
* Mark the cases as not present.
*/
for (zcp = uu_list_first(zfs_cases); zcp != NULL;
zcp = uu_list_next(zfs_cases, zcp))
zcp->zc_present = B_FALSE;
/*
* Iterate over all pools and mark the pools and vdevs found. If this
* fails (most probably because we're out of memory), then don't close
* any of the cases and we cannot be sure they are accurate.
*/
if (zpool_iter(zhdl, zfs_mark_pool, NULL) != 0)
return;
/*
* Remove those cases which were not found.
*/
walk = uu_list_walk_start(zfs_cases, UU_WALK_ROBUST);
while ((zcp = uu_list_walk_next(walk)) != NULL) {
if (!zcp->zc_present)
fmd_case_close(hdl, zcp->zc_case);
}
uu_list_walk_end(walk);
}
/*
* Construct the name of a serd engine given the pool/vdev GUID and type (io or
* checksum).
*/
static void
zfs_serd_name(char *buf, uint64_t pool_guid, uint64_t vdev_guid,
const char *type)
{
(void) snprintf(buf, MAX_SERDLEN, "zfs_%llx_%llx_%s",
(long long unsigned int)pool_guid,
(long long unsigned int)vdev_guid, type);
}
/*
* Solve a given ZFS case. This first checks to make sure the diagnosis is
* still valid, as well as cleaning up any pending timer associated with the
* case.
*/
static void
zfs_case_solve(fmd_hdl_t *hdl, zfs_case_t *zcp, const char *faultname,
boolean_t checkunusable)
{
nvlist_t *detector, *fault;
boolean_t serialize;
nvlist_t *fru = NULL;
fmd_hdl_debug(hdl, "solving fault '%s'", faultname);
/*
* Construct the detector from the case data. The detector is in the
* ZFS scheme, and is either the pool or the vdev, depending on whether
* this is a vdev or pool fault.
*/
detector = fmd_nvl_alloc(hdl, FMD_SLEEP);
(void) nvlist_add_uint8(detector, FM_VERSION, ZFS_SCHEME_VERSION0);
(void) nvlist_add_string(detector, FM_FMRI_SCHEME, FM_FMRI_SCHEME_ZFS);
(void) nvlist_add_uint64(detector, FM_FMRI_ZFS_POOL,
zcp->zc_data.zc_pool_guid);
if (zcp->zc_data.zc_vdev_guid != 0) {
(void) nvlist_add_uint64(detector, FM_FMRI_ZFS_VDEV,
zcp->zc_data.zc_vdev_guid);
}
fault = fmd_nvl_create_fault(hdl, faultname, 100, detector,
fru, detector);
fmd_case_add_suspect(hdl, zcp->zc_case, fault);
nvlist_free(fru);
fmd_case_solve(hdl, zcp->zc_case);
serialize = B_FALSE;
if (zcp->zc_data.zc_has_remove_timer) {
fmd_timer_remove(hdl, zcp->zc_remove_timer);
zcp->zc_data.zc_has_remove_timer = 0;
serialize = B_TRUE;
}
if (serialize)
zfs_case_serialize(hdl, zcp);
nvlist_free(detector);
}
static boolean_t
timeval_earlier(er_timeval_t *a, er_timeval_t *b)
{
return (a->ertv_sec < b->ertv_sec ||
(a->ertv_sec == b->ertv_sec && a->ertv_nsec < b->ertv_nsec));
}
/*ARGSUSED*/
static void
zfs_ereport_when(fmd_hdl_t *hdl, nvlist_t *nvl, er_timeval_t *when)
{
int64_t *tod;
uint_t nelem;
if (nvlist_lookup_int64_array(nvl, FM_EREPORT_TIME, &tod,
&nelem) == 0 && nelem == 2) {
when->ertv_sec = tod[0];
when->ertv_nsec = tod[1];
} else {
when->ertv_sec = when->ertv_nsec = UINT64_MAX;
}
}
/*
* Main fmd entry point.
*/
/*ARGSUSED*/
static void
zfs_fm_recv(fmd_hdl_t *hdl, fmd_event_t *ep, nvlist_t *nvl, const char *class)
{
zfs_case_t *zcp, *dcp;
int32_t pool_state;
uint64_t ena, pool_guid, vdev_guid;
er_timeval_t pool_load;
er_timeval_t er_when;
nvlist_t *detector;
boolean_t pool_found = B_FALSE;
boolean_t isresource;
char *type;
/*
* We subscribe to notifications for vdev or pool removal. In these
* cases, there may be cases that no longer apply. Purge any cases
* that no longer apply.
*/
if (fmd_nvl_class_match(hdl, nvl, "sysevent.fs.zfs.*")) {
fmd_hdl_debug(hdl, "purging orphaned cases from %s",
strrchr(class, '.') + 1);
zfs_purge_cases(hdl);
zfs_stats.resource_drops.fmds_value.ui64++;
return;
}
isresource = fmd_nvl_class_match(hdl, nvl, "resource.fs.zfs.*");
if (isresource) {
/*
* For resources, we don't have a normal payload.
*/
if (nvlist_lookup_uint64(nvl, FM_EREPORT_PAYLOAD_ZFS_VDEV_GUID,
&vdev_guid) != 0)
pool_state = SPA_LOAD_OPEN;
else
pool_state = SPA_LOAD_NONE;
detector = NULL;
} else {
(void) nvlist_lookup_nvlist(nvl,
FM_EREPORT_DETECTOR, &detector);
(void) nvlist_lookup_int32(nvl,
FM_EREPORT_PAYLOAD_ZFS_POOL_CONTEXT, &pool_state);
}
/*
* We also ignore all ereports generated during an import of a pool,
* since the only possible fault (.pool) would result in import failure,
* and hence no persistent fault. Some day we may want to do something
* with these ereports, so we continue generating them internally.
*/
if (pool_state == SPA_LOAD_IMPORT) {
zfs_stats.import_drops.fmds_value.ui64++;
fmd_hdl_debug(hdl, "ignoring '%s' during import", class);
return;
}
/*
* Device I/O errors are ignored during pool open.
*/
if (pool_state == SPA_LOAD_OPEN &&
(fmd_nvl_class_match(hdl, nvl,
ZFS_MAKE_EREPORT(FM_EREPORT_ZFS_CHECKSUM)) ||
fmd_nvl_class_match(hdl, nvl,
ZFS_MAKE_EREPORT(FM_EREPORT_ZFS_IO)) ||
fmd_nvl_class_match(hdl, nvl,
ZFS_MAKE_EREPORT(FM_EREPORT_ZFS_PROBE_FAILURE)))) {
fmd_hdl_debug(hdl, "ignoring '%s' during pool open", class);
zfs_stats.dev_drops.fmds_value.ui64++;
return;
}
/*
* We ignore ereports for anything except disks and files.
*/
if (nvlist_lookup_string(nvl, FM_EREPORT_PAYLOAD_ZFS_VDEV_TYPE,
&type) == 0) {
if (strcmp(type, VDEV_TYPE_DISK) != 0 &&
strcmp(type, VDEV_TYPE_FILE) != 0) {
zfs_stats.vdev_drops.fmds_value.ui64++;
return;
}
}
/*
* Determine if this ereport corresponds to an open case.
* Each vdev or pool can have a single case.
*/
(void) nvlist_lookup_uint64(nvl,
FM_EREPORT_PAYLOAD_ZFS_POOL_GUID, &pool_guid);
if (nvlist_lookup_uint64(nvl,
FM_EREPORT_PAYLOAD_ZFS_VDEV_GUID, &vdev_guid) != 0)
vdev_guid = 0;
if (nvlist_lookup_uint64(nvl, FM_EREPORT_ENA, &ena) != 0)
ena = 0;
zfs_ereport_when(hdl, nvl, &er_when);
for (zcp = uu_list_first(zfs_cases); zcp != NULL;
zcp = uu_list_next(zfs_cases, zcp)) {
if (zcp->zc_data.zc_pool_guid == pool_guid) {
pool_found = B_TRUE;
pool_load = zcp->zc_when;
}
if (zcp->zc_data.zc_vdev_guid == vdev_guid)
break;
}
/*
* Avoid falsely accusing a pool of being faulty. Do so by
* not replaying ereports that were generated prior to the
* current import. If the failure that generated them was
* transient because the device was actually removed but we
* didn't receive the normal asynchronous notification, we
* don't want to mark it as faulted and potentially panic. If
* there is still a problem we'd expect not to be able to
* import the pool, or that new ereports will be generated
* once the pool is used.
*/
if (pool_found && timeval_earlier(&er_when, &pool_load)) {
fmd_hdl_debug(hdl, "ignoring pool %llx, "
"ereport time %lld.%lld, pool load time = %lld.%lld",
pool_guid, er_when.ertv_sec, er_when.ertv_nsec,
pool_load.ertv_sec, pool_load.ertv_nsec);
zfs_stats.old_drops.fmds_value.ui64++;
return;
}
if (!pool_found) {
/*
* Haven't yet seen this pool, but same situation
* may apply.
*/
libzfs_handle_t *zhdl = fmd_hdl_getspecific(hdl);
struct load_time_arg la;
la.lt_guid = pool_guid;
la.lt_time = &pool_load;
la.lt_found = B_FALSE;
if (zhdl != NULL &&
zpool_iter(zhdl, zpool_find_load_time, &la) == 0 &&
la.lt_found == B_TRUE) {
pool_found = B_TRUE;
if (timeval_earlier(&er_when, &pool_load)) {
fmd_hdl_debug(hdl, "ignoring pool %llx, "
"ereport time %lld.%lld, "
"pool load time = %lld.%lld",
pool_guid, er_when.ertv_sec,
er_when.ertv_nsec, pool_load.ertv_sec,
pool_load.ertv_nsec);
zfs_stats.old_drops.fmds_value.ui64++;
return;
}
}
}
if (zcp == NULL) {
fmd_case_t *cs;
zfs_case_data_t data = { 0 };
/*
* If this is one of our 'fake' resource ereports, and there is
* no case open, simply discard it.
*/
if (isresource) {
zfs_stats.resource_drops.fmds_value.ui64++;
fmd_hdl_debug(hdl, "discarding '%s for vdev %llu",
class, vdev_guid);
return;
}
/*
* Skip tracking some ereports
*/
if (strcmp(class,
ZFS_MAKE_EREPORT(FM_EREPORT_ZFS_DATA)) == 0 ||
strcmp(class,
ZFS_MAKE_EREPORT(FM_EREPORT_ZFS_CONFIG_CACHE_WRITE)) == 0 ||
strcmp(class,
ZFS_MAKE_EREPORT(FM_EREPORT_ZFS_DELAY)) == 0) {
zfs_stats.resource_drops.fmds_value.ui64++;
return;
}
/*
* Open a new case.
*/
cs = fmd_case_open(hdl, NULL);
fmd_hdl_debug(hdl, "opening case for vdev %llu due to '%s'",
vdev_guid, class);
/*
* Initialize the case buffer. To commonize code, we actually
* create the buffer with existing data, and then call
* zfs_case_unserialize() to instantiate the in-core structure.
*/
fmd_buf_create(hdl, cs, CASE_DATA, sizeof (zfs_case_data_t));
data.zc_version = CASE_DATA_VERSION_SERD;
data.zc_ena = ena;
data.zc_pool_guid = pool_guid;
data.zc_vdev_guid = vdev_guid;
data.zc_pool_state = (int)pool_state;
fmd_buf_write(hdl, cs, CASE_DATA, &data, sizeof (data));
zcp = zfs_case_unserialize(hdl, cs);
assert(zcp != NULL);
if (pool_found)
zcp->zc_when = pool_load;
}
if (isresource) {
fmd_hdl_debug(hdl, "resource event '%s'", class);
if (fmd_nvl_class_match(hdl, nvl,
ZFS_MAKE_RSRC(FM_RESOURCE_AUTOREPLACE))) {
/*
* The 'resource.fs.zfs.autoreplace' event indicates
* that the pool was loaded with the 'autoreplace'
* property set. In this case, any pending device
* failures should be ignored, as the asynchronous
* autoreplace handling will take care of them.
*/
fmd_case_close(hdl, zcp->zc_case);
} else if (fmd_nvl_class_match(hdl, nvl,
ZFS_MAKE_RSRC(FM_RESOURCE_REMOVED))) {
/*
* The 'resource.fs.zfs.removed' event indicates that
* device removal was detected, and the device was
* closed asynchronously. If this is the case, we
* assume that any recent I/O errors were due to the
* device removal, not any fault of the device itself.
* We reset the SERD engine, and cancel any pending
* timers.
*/
if (zcp->zc_data.zc_has_remove_timer) {
fmd_timer_remove(hdl, zcp->zc_remove_timer);
zcp->zc_data.zc_has_remove_timer = 0;
zfs_case_serialize(hdl, zcp);
}
if (zcp->zc_data.zc_serd_io[0] != '\0')
fmd_serd_reset(hdl, zcp->zc_data.zc_serd_io);
if (zcp->zc_data.zc_serd_checksum[0] != '\0')
fmd_serd_reset(hdl,
zcp->zc_data.zc_serd_checksum);
} else if (fmd_nvl_class_match(hdl, nvl,
ZFS_MAKE_RSRC(FM_RESOURCE_STATECHANGE))) {
uint64_t state = 0;
if (zcp != NULL &&
nvlist_lookup_uint64(nvl,
FM_EREPORT_PAYLOAD_ZFS_VDEV_STATE, &state) == 0 &&
state == VDEV_STATE_HEALTHY) {
fmd_hdl_debug(hdl, "closing case after a "
"device statechange to healthy");
fmd_case_close(hdl, zcp->zc_case);
}
}
zfs_stats.resource_drops.fmds_value.ui64++;
return;
}
/*
* Associate the ereport with this case.
*/
fmd_case_add_ereport(hdl, zcp->zc_case, ep);
/*
* Don't do anything else if this case is already solved.
*/
if (fmd_case_solved(hdl, zcp->zc_case))
return;
fmd_hdl_debug(hdl, "error event '%s'", class);
/*
* Determine if we should solve the case and generate a fault. We solve
* a case if:
*
* a. A pool failed to open (ereport.fs.zfs.pool)
* b. A device failed to open (ereport.fs.zfs.pool) while a pool
* was up and running.
*
* We may see a series of ereports associated with a pool open, all
* chained together by the same ENA. If the pool open succeeds, then
* we'll see no further ereports. To detect when a pool open has
* succeeded, we associate a timer with the event. When it expires, we
* close the case.
*/
if (fmd_nvl_class_match(hdl, nvl,
ZFS_MAKE_EREPORT(FM_EREPORT_ZFS_POOL))) {
/*
* Pool level fault. Before solving the case, go through and
* close any open device cases that may be pending.
*/
for (dcp = uu_list_first(zfs_cases); dcp != NULL;
dcp = uu_list_next(zfs_cases, dcp)) {
if (dcp->zc_data.zc_pool_guid ==
zcp->zc_data.zc_pool_guid &&
dcp->zc_data.zc_vdev_guid != 0)
fmd_case_close(hdl, dcp->zc_case);
}
zfs_case_solve(hdl, zcp, "fault.fs.zfs.pool", B_TRUE);
} else if (fmd_nvl_class_match(hdl, nvl,
ZFS_MAKE_EREPORT(FM_EREPORT_ZFS_LOG_REPLAY))) {
/*
* Pool level fault for reading the intent logs.
*/
zfs_case_solve(hdl, zcp, "fault.fs.zfs.log_replay", B_TRUE);
} else if (fmd_nvl_class_match(hdl, nvl, "ereport.fs.zfs.vdev.*")) {
/*
* Device fault.
*/
zfs_case_solve(hdl, zcp, "fault.fs.zfs.device", B_TRUE);
} else if (fmd_nvl_class_match(hdl, nvl,
ZFS_MAKE_EREPORT(FM_EREPORT_ZFS_IO)) ||
fmd_nvl_class_match(hdl, nvl,
ZFS_MAKE_EREPORT(FM_EREPORT_ZFS_CHECKSUM)) ||
fmd_nvl_class_match(hdl, nvl,
ZFS_MAKE_EREPORT(FM_EREPORT_ZFS_IO_FAILURE)) ||
fmd_nvl_class_match(hdl, nvl,
ZFS_MAKE_EREPORT(FM_EREPORT_ZFS_PROBE_FAILURE))) {
char *failmode = NULL;
boolean_t checkremove = B_FALSE;
/*
* If this is a checksum or I/O error, then toss it into the
* appropriate SERD engine and check to see if it has fired.
* Ideally, we want to do something more sophisticated,
* (persistent errors for a single data block, etc). For now,
* a single SERD engine is sufficient.
*/
if (fmd_nvl_class_match(hdl, nvl,
ZFS_MAKE_EREPORT(FM_EREPORT_ZFS_IO))) {
if (zcp->zc_data.zc_serd_io[0] == '\0') {
zfs_serd_name(zcp->zc_data.zc_serd_io,
pool_guid, vdev_guid, "io");
fmd_serd_create(hdl, zcp->zc_data.zc_serd_io,
fmd_prop_get_int32(hdl, "io_N"),
fmd_prop_get_int64(hdl, "io_T"));
zfs_case_serialize(hdl, zcp);
}
if (fmd_serd_record(hdl, zcp->zc_data.zc_serd_io, ep))
checkremove = B_TRUE;
} else if (fmd_nvl_class_match(hdl, nvl,
ZFS_MAKE_EREPORT(FM_EREPORT_ZFS_CHECKSUM))) {
if (zcp->zc_data.zc_serd_checksum[0] == '\0') {
zfs_serd_name(zcp->zc_data.zc_serd_checksum,
pool_guid, vdev_guid, "checksum");
fmd_serd_create(hdl,
zcp->zc_data.zc_serd_checksum,
fmd_prop_get_int32(hdl, "checksum_N"),
fmd_prop_get_int64(hdl, "checksum_T"));
zfs_case_serialize(hdl, zcp);
}
if (fmd_serd_record(hdl,
zcp->zc_data.zc_serd_checksum, ep)) {
zfs_case_solve(hdl, zcp,
"fault.fs.zfs.vdev.checksum", B_FALSE);
}
} else if (fmd_nvl_class_match(hdl, nvl,
ZFS_MAKE_EREPORT(FM_EREPORT_ZFS_IO_FAILURE)) &&
(nvlist_lookup_string(nvl,
FM_EREPORT_PAYLOAD_ZFS_POOL_FAILMODE, &failmode) == 0) &&
failmode != NULL) {
if (strncmp(failmode, FM_EREPORT_FAILMODE_CONTINUE,
strlen(FM_EREPORT_FAILMODE_CONTINUE)) == 0) {
zfs_case_solve(hdl, zcp,
"fault.fs.zfs.io_failure_continue",
B_FALSE);
} else if (strncmp(failmode, FM_EREPORT_FAILMODE_WAIT,
strlen(FM_EREPORT_FAILMODE_WAIT)) == 0) {
zfs_case_solve(hdl, zcp,
"fault.fs.zfs.io_failure_wait", B_FALSE);
}
} else if (fmd_nvl_class_match(hdl, nvl,
ZFS_MAKE_EREPORT(FM_EREPORT_ZFS_PROBE_FAILURE))) {
#ifndef __linux__
/* This causes an unexpected fault diagnosis on linux */
checkremove = B_TRUE;
#endif
}
/*
* Because I/O errors may be due to device removal, we postpone
* any diagnosis until we're sure that we aren't about to
* receive a 'resource.fs.zfs.removed' event.
*/
if (checkremove) {
if (zcp->zc_data.zc_has_remove_timer)
fmd_timer_remove(hdl, zcp->zc_remove_timer);
zcp->zc_remove_timer = fmd_timer_install(hdl, zcp, NULL,
zfs_remove_timeout);
if (!zcp->zc_data.zc_has_remove_timer) {
zcp->zc_data.zc_has_remove_timer = 1;
zfs_case_serialize(hdl, zcp);
}
}
}
}
/*
* The timeout is fired when we diagnosed an I/O error, and it was not due to
* device removal (which would cause the timeout to be cancelled).
*/
/* ARGSUSED */
static void
zfs_fm_timeout(fmd_hdl_t *hdl, id_t id, void *data)
{
zfs_case_t *zcp = data;
if (id == zcp->zc_remove_timer)
zfs_case_solve(hdl, zcp, "fault.fs.zfs.vdev.io", B_FALSE);
}
/*
* The specified case has been closed and any case-specific
* data structures should be deallocated.
*/
static void
zfs_fm_close(fmd_hdl_t *hdl, fmd_case_t *cs)
{
zfs_case_t *zcp = fmd_case_getspecific(hdl, cs);
if (zcp->zc_data.zc_serd_checksum[0] != '\0')
fmd_serd_destroy(hdl, zcp->zc_data.zc_serd_checksum);
if (zcp->zc_data.zc_serd_io[0] != '\0')
fmd_serd_destroy(hdl, zcp->zc_data.zc_serd_io);
if (zcp->zc_data.zc_has_remove_timer)
fmd_timer_remove(hdl, zcp->zc_remove_timer);
uu_list_remove(zfs_cases, zcp);
uu_list_node_fini(zcp, &zcp->zc_node, zfs_case_pool);
fmd_hdl_free(hdl, zcp, sizeof (zfs_case_t));
}
/*
* We use the fmd gc entry point to look for old cases that no longer apply.
* This allows us to keep our set of case data small in a long running system.
*/
static void
zfs_fm_gc(fmd_hdl_t *hdl)
{
zfs_purge_cases(hdl);
}
static const fmd_hdl_ops_t fmd_ops = {
zfs_fm_recv, /* fmdo_recv */
zfs_fm_timeout, /* fmdo_timeout */
zfs_fm_close, /* fmdo_close */
NULL, /* fmdo_stats */
zfs_fm_gc, /* fmdo_gc */
};
static const fmd_prop_t fmd_props[] = {
{ "checksum_N", FMD_TYPE_UINT32, "10" },
{ "checksum_T", FMD_TYPE_TIME, "10min" },
{ "io_N", FMD_TYPE_UINT32, "10" },
{ "io_T", FMD_TYPE_TIME, "10min" },
{ "remove_timeout", FMD_TYPE_TIME, "15sec" },
{ NULL, 0, NULL }
};
static const fmd_hdl_info_t fmd_info = {
"ZFS Diagnosis Engine", "1.0", &fmd_ops, fmd_props
};
void
_zfs_diagnosis_init(fmd_hdl_t *hdl)
{
libzfs_handle_t *zhdl;
if ((zhdl = libzfs_init()) == NULL)
return;
if ((zfs_case_pool = uu_list_pool_create("zfs_case_pool",
sizeof (zfs_case_t), offsetof(zfs_case_t, zc_node),
NULL, UU_LIST_POOL_DEBUG)) == NULL) {
libzfs_fini(zhdl);
return;
}
if ((zfs_cases = uu_list_create(zfs_case_pool, NULL,
UU_LIST_DEBUG)) == NULL) {
uu_list_pool_destroy(zfs_case_pool);
libzfs_fini(zhdl);
return;
}
if (fmd_hdl_register(hdl, FMD_API_VERSION, &fmd_info) != 0) {
uu_list_destroy(zfs_cases);
uu_list_pool_destroy(zfs_case_pool);
libzfs_fini(zhdl);
return;
}
fmd_hdl_setspecific(hdl, zhdl);
(void) fmd_stat_create(hdl, FMD_STAT_NOALLOC, sizeof (zfs_stats) /
sizeof (fmd_stat_t), (fmd_stat_t *)&zfs_stats);
zfs_remove_timeout = fmd_prop_get_int64(hdl, "remove_timeout");
}
void
_zfs_diagnosis_fini(fmd_hdl_t *hdl)
{
zfs_case_t *zcp;
uu_list_walk_t *walk;
libzfs_handle_t *zhdl;
/*
* Remove all active cases.
*/
walk = uu_list_walk_start(zfs_cases, UU_WALK_ROBUST);
while ((zcp = uu_list_walk_next(walk)) != NULL) {
fmd_hdl_debug(hdl, "removing case ena %llu",
(long long unsigned)zcp->zc_data.zc_ena);
uu_list_remove(zfs_cases, zcp);
uu_list_node_fini(zcp, &zcp->zc_node, zfs_case_pool);
fmd_hdl_free(hdl, zcp, sizeof (zfs_case_t));
}
uu_list_walk_end(walk);
uu_list_destroy(zfs_cases);
uu_list_pool_destroy(zfs_case_pool);
zhdl = fmd_hdl_getspecific(hdl);
libzfs_fini(zhdl);
}

954
zfs-2.0.0-rc6/cmd/zed/agents/zfs_mod.c Normal file
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@ -0,0 +1,954 @@
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2012 by Delphix. All rights reserved.
* Copyright 2014 Nexenta Systems, Inc. All rights reserved.
* Copyright (c) 2016, 2017, Intel Corporation.
* Copyright (c) 2017 Open-E, Inc. All Rights Reserved.
*/
/*
* ZFS syseventd module.
*
* file origin: openzfs/usr/src/cmd/syseventd/modules/zfs_mod/zfs_mod.c
*
* The purpose of this module is to identify when devices are added to the
* system, and appropriately online or replace the affected vdevs.
*
* When a device is added to the system:
*
* 1. Search for any vdevs whose devid matches that of the newly added
* device.
*
* 2. If no vdevs are found, then search for any vdevs whose udev path
* matches that of the new device.
*
* 3. If no vdevs match by either method, then ignore the event.
*
* 4. Attempt to online the device with a flag to indicate that it should
* be unspared when resilvering completes. If this succeeds, then the
* same device was inserted and we should continue normally.
*
* 5. If the pool does not have the 'autoreplace' property set, attempt to
* online the device again without the unspare flag, which will
* generate a FMA fault.
*
* 6. If the pool has the 'autoreplace' property set, and the matching vdev
* is a whole disk, then label the new disk and attempt a 'zpool
* replace'.
*
* The module responds to EC_DEV_ADD events. The special ESC_ZFS_VDEV_CHECK
* event indicates that a device failed to open during pool load, but the
* autoreplace property was set. In this case, we deferred the associated
* FMA fault until our module had a chance to process the autoreplace logic.
* If the device could not be replaced, then the second online attempt will
* trigger the FMA fault that we skipped earlier.
*
* On Linux udev provides a disk insert for both the disk and the partition.
*/
#include <ctype.h>
#include <fcntl.h>
#include <libnvpair.h>
#include <libzfs.h>
#include <libzutil.h>
#include <limits.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <sys/list.h>
#include <sys/sunddi.h>
#include <sys/sysevent/eventdefs.h>
#include <sys/sysevent/dev.h>
#include <thread_pool.h>
#include <pthread.h>
#include <unistd.h>
#include <errno.h>
#include "zfs_agents.h"
#include "../zed_log.h"
#define DEV_BYID_PATH "/dev/disk/by-id/"
#define DEV_BYPATH_PATH "/dev/disk/by-path/"
#define DEV_BYVDEV_PATH "/dev/disk/by-vdev/"
typedef void (*zfs_process_func_t)(zpool_handle_t *, nvlist_t *, boolean_t);
libzfs_handle_t *g_zfshdl;
list_t g_pool_list; /* list of unavailable pools at initialization */
list_t g_device_list; /* list of disks with asynchronous label request */
tpool_t *g_tpool;
boolean_t g_enumeration_done;
pthread_t g_zfs_tid; /* zfs_enum_pools() thread */
typedef struct unavailpool {
zpool_handle_t *uap_zhp;
list_node_t uap_node;
} unavailpool_t;
typedef struct pendingdev {
char pd_physpath[128];
list_node_t pd_node;
} pendingdev_t;
static int
zfs_toplevel_state(zpool_handle_t *zhp)
{
nvlist_t *nvroot;
vdev_stat_t *vs;
unsigned int c;
verify(nvlist_lookup_nvlist(zpool_get_config(zhp, NULL),
ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0);
verify(nvlist_lookup_uint64_array(nvroot, ZPOOL_CONFIG_VDEV_STATS,
(uint64_t **)&vs, &c) == 0);
return (vs->vs_state);
}
static int
zfs_unavail_pool(zpool_handle_t *zhp, void *data)
{
zed_log_msg(LOG_INFO, "zfs_unavail_pool: examining '%s' (state %d)",
zpool_get_name(zhp), (int)zfs_toplevel_state(zhp));
if (zfs_toplevel_state(zhp) < VDEV_STATE_DEGRADED) {
unavailpool_t *uap;
uap = malloc(sizeof (unavailpool_t));
uap->uap_zhp = zhp;
list_insert_tail((list_t *)data, uap);
} else {
zpool_close(zhp);
}
return (0);
}
/*
* Two stage replace on Linux
* since we get disk notifications
* we can wait for partitioned disk slice to show up!
*
* First stage tags the disk, initiates async partitioning, and returns
* Second stage finds the tag and proceeds to ZFS labeling/replace
*
* disk-add --> label-disk + tag-disk --> partition-add --> zpool_vdev_attach
*
* 1. physical match with no fs, no partition
* tag it top, partition disk
*
* 2. physical match again, see partition and tag
*
*/
/*
* The device associated with the given vdev (either by devid or physical path)
* has been added to the system. If 'isdisk' is set, then we only attempt a
* replacement if it's a whole disk. This also implies that we should label the
* disk first.
*
* First, we attempt to online the device (making sure to undo any spare
* operation when finished). If this succeeds, then we're done. If it fails,
* and the new state is VDEV_CANT_OPEN, it indicates that the device was opened,
* but that the label was not what we expected. If the 'autoreplace' property
* is enabled, then we relabel the disk (if specified), and attempt a 'zpool
* replace'. If the online is successful, but the new state is something else
* (REMOVED or FAULTED), it indicates that we're out of sync or in some sort of
* race, and we should avoid attempting to relabel the disk.
*
* Also can arrive here from a ESC_ZFS_VDEV_CHECK event
*/
static void
zfs_process_add(zpool_handle_t *zhp, nvlist_t *vdev, boolean_t labeled)
{
char *path;
vdev_state_t newstate;
nvlist_t *nvroot, *newvd;
pendingdev_t *device;
uint64_t wholedisk = 0ULL;
uint64_t offline = 0ULL;
uint64_t guid = 0ULL;
char *physpath = NULL, *new_devid = NULL, *enc_sysfs_path = NULL;
char rawpath[PATH_MAX], fullpath[PATH_MAX];
char devpath[PATH_MAX];
int ret;
boolean_t is_dm = B_FALSE;
boolean_t is_sd = B_FALSE;
uint_t c;
vdev_stat_t *vs;
if (nvlist_lookup_string(vdev, ZPOOL_CONFIG_PATH, &path) != 0)
return;
/* Skip healthy disks */
verify(nvlist_lookup_uint64_array(vdev, ZPOOL_CONFIG_VDEV_STATS,
(uint64_t **)&vs, &c) == 0);
if (vs->vs_state == VDEV_STATE_HEALTHY) {
zed_log_msg(LOG_INFO, "%s: %s is already healthy, skip it.",
__func__, path);
return;
}
(void) nvlist_lookup_string(vdev, ZPOOL_CONFIG_PHYS_PATH, &physpath);
(void) nvlist_lookup_string(vdev, ZPOOL_CONFIG_VDEV_ENC_SYSFS_PATH,
&enc_sysfs_path);
(void) nvlist_lookup_uint64(vdev, ZPOOL_CONFIG_WHOLE_DISK, &wholedisk);
(void) nvlist_lookup_uint64(vdev, ZPOOL_CONFIG_OFFLINE, &offline);
(void) nvlist_lookup_uint64(vdev, ZPOOL_CONFIG_GUID, &guid);
if (offline)
return; /* don't intervene if it was taken offline */
is_dm = zfs_dev_is_dm(path);
zed_log_msg(LOG_INFO, "zfs_process_add: pool '%s' vdev '%s', phys '%s'"
" wholedisk %d, %s dm (guid %llu)", zpool_get_name(zhp), path,
physpath ? physpath : "NULL", wholedisk, is_dm ? "is" : "not",
(long long unsigned int)guid);
/*
* The VDEV guid is preferred for identification (gets passed in path)
*/
if (guid != 0) {
(void) snprintf(fullpath, sizeof (fullpath), "%llu",
(long long unsigned int)guid);
} else {
/*
* otherwise use path sans partition suffix for whole disks
*/
(void) strlcpy(fullpath, path, sizeof (fullpath));
if (wholedisk) {
char *spath = zfs_strip_partition(fullpath);
if (!spath) {
zed_log_msg(LOG_INFO, "%s: Can't alloc",
__func__);
return;
}
(void) strlcpy(fullpath, spath, sizeof (fullpath));
free(spath);
}
}
/*
* Attempt to online the device.
*/
if (zpool_vdev_online(zhp, fullpath,
ZFS_ONLINE_CHECKREMOVE | ZFS_ONLINE_UNSPARE, &newstate) == 0 &&
(newstate == VDEV_STATE_HEALTHY ||
newstate == VDEV_STATE_DEGRADED)) {
zed_log_msg(LOG_INFO, " zpool_vdev_online: vdev %s is %s",
fullpath, (newstate == VDEV_STATE_HEALTHY) ?
"HEALTHY" : "DEGRADED");
return;
}
/*
* vdev_id alias rule for using scsi_debug devices (FMA automated
* testing)
*/
if (physpath != NULL && strcmp("scsidebug", physpath) == 0)
is_sd = B_TRUE;
/*
* If the pool doesn't have the autoreplace property set, then use
* vdev online to trigger a FMA fault by posting an ereport.
*/
if (!zpool_get_prop_int(zhp, ZPOOL_PROP_AUTOREPLACE, NULL) ||
!(wholedisk || is_dm) || (physpath == NULL)) {
(void) zpool_vdev_online(zhp, fullpath, ZFS_ONLINE_FORCEFAULT,
&newstate);
zed_log_msg(LOG_INFO, "Pool's autoreplace is not enabled or "
"not a whole disk for '%s'", fullpath);
return;
}
/*
* Convert physical path into its current device node. Rawpath
* needs to be /dev/disk/by-vdev for a scsi_debug device since
* /dev/disk/by-path will not be present.
*/
(void) snprintf(rawpath, sizeof (rawpath), "%s%s",
is_sd ? DEV_BYVDEV_PATH : DEV_BYPATH_PATH, physpath);
if (realpath(rawpath, devpath) == NULL && !is_dm) {
zed_log_msg(LOG_INFO, " realpath: %s failed (%s)",
rawpath, strerror(errno));
(void) zpool_vdev_online(zhp, fullpath, ZFS_ONLINE_FORCEFAULT,
&newstate);
zed_log_msg(LOG_INFO, " zpool_vdev_online: %s FORCEFAULT (%s)",
fullpath, libzfs_error_description(g_zfshdl));
return;
}
/* Only autoreplace bad disks */
if ((vs->vs_state != VDEV_STATE_DEGRADED) &&
(vs->vs_state != VDEV_STATE_FAULTED) &&
(vs->vs_state != VDEV_STATE_CANT_OPEN)) {
return;
}
nvlist_lookup_string(vdev, "new_devid", &new_devid);
if (is_dm) {
/* Don't label device mapper or multipath disks. */
} else if (!labeled) {
/*
* we're auto-replacing a raw disk, so label it first
*/
char *leafname;
/*
* If this is a request to label a whole disk, then attempt to
* write out the label. Before we can label the disk, we need
* to map the physical string that was matched on to the under
* lying device node.
*
* If any part of this process fails, then do a force online
* to trigger a ZFS fault for the device (and any hot spare
* replacement).
*/
leafname = strrchr(devpath, '/') + 1;
/*
* If this is a request to label a whole disk, then attempt to
* write out the label.
*/
if (zpool_label_disk(g_zfshdl, zhp, leafname) != 0) {
zed_log_msg(LOG_INFO, " zpool_label_disk: could not "
"label '%s' (%s)", leafname,
libzfs_error_description(g_zfshdl));
(void) zpool_vdev_online(zhp, fullpath,
ZFS_ONLINE_FORCEFAULT, &newstate);
return;
}
/*
* The disk labeling is asynchronous on Linux. Just record
* this label request and return as there will be another
* disk add event for the partition after the labeling is
* completed.
*/
device = malloc(sizeof (pendingdev_t));
(void) strlcpy(device->pd_physpath, physpath,
sizeof (device->pd_physpath));
list_insert_tail(&g_device_list, device);
zed_log_msg(LOG_INFO, " zpool_label_disk: async '%s' (%llu)",
leafname, (u_longlong_t)guid);
return; /* resumes at EC_DEV_ADD.ESC_DISK for partition */
} else /* labeled */ {
boolean_t found = B_FALSE;
/*
* match up with request above to label the disk
*/
for (device = list_head(&g_device_list); device != NULL;
device = list_next(&g_device_list, device)) {
if (strcmp(physpath, device->pd_physpath) == 0) {
list_remove(&g_device_list, device);
free(device);
found = B_TRUE;
break;
}
zed_log_msg(LOG_INFO, "zpool_label_disk: %s != %s",
physpath, device->pd_physpath);
}
if (!found) {
/* unexpected partition slice encountered */
zed_log_msg(LOG_INFO, "labeled disk %s unexpected here",
fullpath);
(void) zpool_vdev_online(zhp, fullpath,
ZFS_ONLINE_FORCEFAULT, &newstate);
return;
}
zed_log_msg(LOG_INFO, " zpool_label_disk: resume '%s' (%llu)",
physpath, (u_longlong_t)guid);
(void) snprintf(devpath, sizeof (devpath), "%s%s",
DEV_BYID_PATH, new_devid);
}
/*
* Construct the root vdev to pass to zpool_vdev_attach(). While adding
* the entire vdev structure is harmless, we construct a reduced set of
* path/physpath/wholedisk to keep it simple.
*/
if (nvlist_alloc(&nvroot, NV_UNIQUE_NAME, 0) != 0) {
zed_log_msg(LOG_WARNING, "zfs_mod: nvlist_alloc out of memory");
return;
}
if (nvlist_alloc(&newvd, NV_UNIQUE_NAME, 0) != 0) {
zed_log_msg(LOG_WARNING, "zfs_mod: nvlist_alloc out of memory");
nvlist_free(nvroot);
return;
}
if (nvlist_add_string(newvd, ZPOOL_CONFIG_TYPE, VDEV_TYPE_DISK) != 0 ||
nvlist_add_string(newvd, ZPOOL_CONFIG_PATH, path) != 0 ||
nvlist_add_string(newvd, ZPOOL_CONFIG_DEVID, new_devid) != 0 ||
(physpath != NULL && nvlist_add_string(newvd,
ZPOOL_CONFIG_PHYS_PATH, physpath) != 0) ||
(enc_sysfs_path != NULL && nvlist_add_string(newvd,
ZPOOL_CONFIG_VDEV_ENC_SYSFS_PATH, enc_sysfs_path) != 0) ||
nvlist_add_uint64(newvd, ZPOOL_CONFIG_WHOLE_DISK, wholedisk) != 0 ||
nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE, VDEV_TYPE_ROOT) != 0 ||
nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, &newvd,
1) != 0) {
zed_log_msg(LOG_WARNING, "zfs_mod: unable to add nvlist pairs");
nvlist_free(newvd);
nvlist_free(nvroot);
return;
}
nvlist_free(newvd);
/*
* Wait for udev to verify the links exist, then auto-replace
* the leaf disk at same physical location.
*/
if (zpool_label_disk_wait(path, 3000) != 0) {
zed_log_msg(LOG_WARNING, "zfs_mod: expected replacement "
"disk %s is missing", path);
nvlist_free(nvroot);
return;
}
ret = zpool_vdev_attach(zhp, fullpath, path, nvroot, B_TRUE, B_FALSE);
zed_log_msg(LOG_INFO, " zpool_vdev_replace: %s with %s (%s)",
fullpath, path, (ret == 0) ? "no errors" :
libzfs_error_description(g_zfshdl));
nvlist_free(nvroot);
}
/*
* Utility functions to find a vdev matching given criteria.
*/
typedef struct dev_data {
const char *dd_compare;
const char *dd_prop;
zfs_process_func_t dd_func;
boolean_t dd_found;
boolean_t dd_islabeled;
uint64_t dd_pool_guid;
uint64_t dd_vdev_guid;
const char *dd_new_devid;
} dev_data_t;
static void
zfs_iter_vdev(zpool_handle_t *zhp, nvlist_t *nvl, void *data)
{
dev_data_t *dp = data;
char *path = NULL;
uint_t c, children;
nvlist_t **child;
/*
* First iterate over any children.
*/
if (nvlist_lookup_nvlist_array(nvl, ZPOOL_CONFIG_CHILDREN,
&child, &children) == 0) {
for (c = 0; c < children; c++)
zfs_iter_vdev(zhp, child[c], data);
}
/*
* Iterate over any spares and cache devices
*/
if (nvlist_lookup_nvlist_array(nvl, ZPOOL_CONFIG_SPARES,
&child, &children) == 0) {
for (c = 0; c < children; c++)
zfs_iter_vdev(zhp, child[c], data);
}
if (nvlist_lookup_nvlist_array(nvl, ZPOOL_CONFIG_L2CACHE,
&child, &children) == 0) {
for (c = 0; c < children; c++)
zfs_iter_vdev(zhp, child[c], data);
}
/* once a vdev was matched and processed there is nothing left to do */
if (dp->dd_found)
return;
/*
* Match by GUID if available otherwise fallback to devid or physical
*/
if (dp->dd_vdev_guid != 0) {
uint64_t guid;
if (nvlist_lookup_uint64(nvl, ZPOOL_CONFIG_GUID,
&guid) != 0 || guid != dp->dd_vdev_guid) {
return;
}
zed_log_msg(LOG_INFO, " zfs_iter_vdev: matched on %llu", guid);
dp->dd_found = B_TRUE;
} else if (dp->dd_compare != NULL) {
/*
* NOTE: On Linux there is an event for partition, so unlike
* illumos, substring matching is not required to accommodate
* the partition suffix. An exact match will be present in
* the dp->dd_compare value.
*/
if (nvlist_lookup_string(nvl, dp->dd_prop, &path) != 0 ||
strcmp(dp->dd_compare, path) != 0)
return;
zed_log_msg(LOG_INFO, " zfs_iter_vdev: matched %s on %s",
dp->dd_prop, path);
dp->dd_found = B_TRUE;
/* pass the new devid for use by replacing code */
if (dp->dd_new_devid != NULL) {
(void) nvlist_add_string(nvl, "new_devid",
dp->dd_new_devid);
}
}
(dp->dd_func)(zhp, nvl, dp->dd_islabeled);
}
static void
zfs_enable_ds(void *arg)
{
unavailpool_t *pool = (unavailpool_t *)arg;
(void) zpool_enable_datasets(pool->uap_zhp, NULL, 0);
zpool_close(pool->uap_zhp);
free(pool);
}
static int
zfs_iter_pool(zpool_handle_t *zhp, void *data)
{
nvlist_t *config, *nvl;
dev_data_t *dp = data;
uint64_t pool_guid;
unavailpool_t *pool;
zed_log_msg(LOG_INFO, "zfs_iter_pool: evaluating vdevs on %s (by %s)",
zpool_get_name(zhp), dp->dd_vdev_guid ? "GUID" : dp->dd_prop);
/*
* For each vdev in this pool, look for a match to apply dd_func
*/
if ((config = zpool_get_config(zhp, NULL)) != NULL) {
if (dp->dd_pool_guid == 0 ||
(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID,
&pool_guid) == 0 && pool_guid == dp->dd_pool_guid)) {
(void) nvlist_lookup_nvlist(config,
ZPOOL_CONFIG_VDEV_TREE, &nvl);
zfs_iter_vdev(zhp, nvl, data);
}
}
/*
* if this pool was originally unavailable,
* then enable its datasets asynchronously
*/
if (g_enumeration_done) {
for (pool = list_head(&g_pool_list); pool != NULL;
pool = list_next(&g_pool_list, pool)) {
if (strcmp(zpool_get_name(zhp),
zpool_get_name(pool->uap_zhp)))
continue;
if (zfs_toplevel_state(zhp) >= VDEV_STATE_DEGRADED) {
list_remove(&g_pool_list, pool);
(void) tpool_dispatch(g_tpool, zfs_enable_ds,
pool);
break;
}
}
}
zpool_close(zhp);
return (dp->dd_found); /* cease iteration after a match */
}
/*
* Given a physical device location, iterate over all
* (pool, vdev) pairs which correspond to that location.
*/
static boolean_t
devphys_iter(const char *physical, const char *devid, zfs_process_func_t func,
boolean_t is_slice)
{
dev_data_t data = { 0 };
data.dd_compare = physical;
data.dd_func = func;
data.dd_prop = ZPOOL_CONFIG_PHYS_PATH;
data.dd_found = B_FALSE;
data.dd_islabeled = is_slice;
data.dd_new_devid = devid; /* used by auto replace code */
(void) zpool_iter(g_zfshdl, zfs_iter_pool, &data);
return (data.dd_found);
}
/*
* Given a device identifier, find any vdevs with a matching devid.
* On Linux we can match devid directly which is always a whole disk.
*/
static boolean_t
devid_iter(const char *devid, zfs_process_func_t func, boolean_t is_slice)
{
dev_data_t data = { 0 };
data.dd_compare = devid;
data.dd_func = func;
data.dd_prop = ZPOOL_CONFIG_DEVID;
data.dd_found = B_FALSE;
data.dd_islabeled = is_slice;
data.dd_new_devid = devid;
(void) zpool_iter(g_zfshdl, zfs_iter_pool, &data);
return (data.dd_found);
}
/*
* Handle a EC_DEV_ADD.ESC_DISK event.
*
* illumos
* Expects: DEV_PHYS_PATH string in schema
* Matches: vdev's ZPOOL_CONFIG_PHYS_PATH or ZPOOL_CONFIG_DEVID
*
* path: '/dev/dsk/c0t1d0s0' (persistent)
* devid: 'id1,sd@SATA_____Hitachi_HDS72101______JP2940HZ3H74MC/a'
* phys_path: '/pci@0,0/pci103c,1609@11/disk@1,0:a'
*
* linux
* provides: DEV_PHYS_PATH and DEV_IDENTIFIER strings in schema
* Matches: vdev's ZPOOL_CONFIG_PHYS_PATH or ZPOOL_CONFIG_DEVID
*
* path: '/dev/sdc1' (not persistent)
* devid: 'ata-SAMSUNG_HD204UI_S2HGJD2Z805891-part1'
* phys_path: 'pci-0000:04:00.0-sas-0x4433221106000000-lun-0'
*/
static int
zfs_deliver_add(nvlist_t *nvl, boolean_t is_lofi)
{
char *devpath = NULL, *devid;
boolean_t is_slice;
/*
* Expecting a devid string and an optional physical location
*/
if (nvlist_lookup_string(nvl, DEV_IDENTIFIER, &devid) != 0)
return (-1);
(void) nvlist_lookup_string(nvl, DEV_PHYS_PATH, &devpath);
is_slice = (nvlist_lookup_boolean(nvl, DEV_IS_PART) == 0);
zed_log_msg(LOG_INFO, "zfs_deliver_add: adding %s (%s) (is_slice %d)",
devid, devpath ? devpath : "NULL", is_slice);
/*
* Iterate over all vdevs looking for a match in the following order:
* 1. ZPOOL_CONFIG_DEVID (identifies the unique disk)
* 2. ZPOOL_CONFIG_PHYS_PATH (identifies disk physical location).
*
* For disks, we only want to pay attention to vdevs marked as whole
* disks or are a multipath device.
*/
if (!devid_iter(devid, zfs_process_add, is_slice) && devpath != NULL)
(void) devphys_iter(devpath, devid, zfs_process_add, is_slice);
return (0);
}
/*
* Called when we receive a VDEV_CHECK event, which indicates a device could not
* be opened during initial pool open, but the autoreplace property was set on
* the pool. In this case, we treat it as if it were an add event.
*/
static int
zfs_deliver_check(nvlist_t *nvl)
{
dev_data_t data = { 0 };
if (nvlist_lookup_uint64(nvl, ZFS_EV_POOL_GUID,
&data.dd_pool_guid) != 0 ||
nvlist_lookup_uint64(nvl, ZFS_EV_VDEV_GUID,
&data.dd_vdev_guid) != 0 ||
data.dd_vdev_guid == 0)
return (0);
zed_log_msg(LOG_INFO, "zfs_deliver_check: pool '%llu', vdev %llu",
data.dd_pool_guid, data.dd_vdev_guid);
data.dd_func = zfs_process_add;
(void) zpool_iter(g_zfshdl, zfs_iter_pool, &data);
return (0);
}
static int
zfsdle_vdev_online(zpool_handle_t *zhp, void *data)
{
char *devname = data;
boolean_t avail_spare, l2cache;
nvlist_t *tgt;
int error;
zed_log_msg(LOG_INFO, "zfsdle_vdev_online: searching for '%s' in '%s'",
devname, zpool_get_name(zhp));
if ((tgt = zpool_find_vdev_by_physpath(zhp, devname,
&avail_spare, &l2cache, NULL)) != NULL) {
char *path, fullpath[MAXPATHLEN];
uint64_t wholedisk;
error = nvlist_lookup_string(tgt, ZPOOL_CONFIG_PATH, &path);
if (error) {
zpool_close(zhp);
return (0);
}
error = nvlist_lookup_uint64(tgt, ZPOOL_CONFIG_WHOLE_DISK,
&wholedisk);
if (error)
wholedisk = 0;
if (wholedisk) {
path = strrchr(path, '/');
if (path != NULL) {
path = zfs_strip_partition(path + 1);
if (path == NULL) {
zpool_close(zhp);
return (0);
}
} else {
zpool_close(zhp);
return (0);
}
(void) strlcpy(fullpath, path, sizeof (fullpath));
free(path);
/*
* We need to reopen the pool associated with this
* device so that the kernel can update the size of
* the expanded device. When expanding there is no
* need to restart the scrub from the beginning.
*/
boolean_t scrub_restart = B_FALSE;
(void) zpool_reopen_one(zhp, &scrub_restart);
} else {
(void) strlcpy(fullpath, path, sizeof (fullpath));
}
if (zpool_get_prop_int(zhp, ZPOOL_PROP_AUTOEXPAND, NULL)) {
vdev_state_t newstate;
if (zpool_get_state(zhp) != POOL_STATE_UNAVAIL) {
error = zpool_vdev_online(zhp, fullpath, 0,
&newstate);
zed_log_msg(LOG_INFO, "zfsdle_vdev_online: "
"setting device '%s' to ONLINE state "
"in pool '%s': %d", fullpath,
zpool_get_name(zhp), error);
}
}
zpool_close(zhp);
return (1);
}
zpool_close(zhp);
return (0);
}
/*
* This function handles the ESC_DEV_DLE device change event. Use the
* provided vdev guid when looking up a disk or partition, when the guid
* is not present assume the entire disk is owned by ZFS and append the
* expected -part1 partition information then lookup by physical path.
*/
static int
zfs_deliver_dle(nvlist_t *nvl)
{
char *devname, name[MAXPATHLEN];
uint64_t guid;
if (nvlist_lookup_uint64(nvl, ZFS_EV_VDEV_GUID, &guid) == 0) {
sprintf(name, "%llu", (u_longlong_t)guid);
} else if (nvlist_lookup_string(nvl, DEV_PHYS_PATH, &devname) == 0) {
strlcpy(name, devname, MAXPATHLEN);
zfs_append_partition(name, MAXPATHLEN);
} else {
zed_log_msg(LOG_INFO, "zfs_deliver_dle: no guid or physpath");
}
if (zpool_iter(g_zfshdl, zfsdle_vdev_online, name) != 1) {
zed_log_msg(LOG_INFO, "zfs_deliver_dle: device '%s' not "
"found", name);
return (1);
}
return (0);
}
/*
* syseventd daemon module event handler
*
* Handles syseventd daemon zfs device related events:
*
* EC_DEV_ADD.ESC_DISK
* EC_DEV_STATUS.ESC_DEV_DLE
* EC_ZFS.ESC_ZFS_VDEV_CHECK
*
* Note: assumes only one thread active at a time (not thread safe)
*/
static int
zfs_slm_deliver_event(const char *class, const char *subclass, nvlist_t *nvl)
{
int ret;
boolean_t is_lofi = B_FALSE, is_check = B_FALSE, is_dle = B_FALSE;
if (strcmp(class, EC_DEV_ADD) == 0) {
/*
* We're mainly interested in disk additions, but we also listen
* for new loop devices, to allow for simplified testing.
*/
if (strcmp(subclass, ESC_DISK) == 0)
is_lofi = B_FALSE;
else if (strcmp(subclass, ESC_LOFI) == 0)
is_lofi = B_TRUE;
else
return (0);
is_check = B_FALSE;
} else if (strcmp(class, EC_ZFS) == 0 &&
strcmp(subclass, ESC_ZFS_VDEV_CHECK) == 0) {
/*
* This event signifies that a device failed to open
* during pool load, but the 'autoreplace' property was
* set, so we should pretend it's just been added.
*/
is_check = B_TRUE;
} else if (strcmp(class, EC_DEV_STATUS) == 0 &&
strcmp(subclass, ESC_DEV_DLE) == 0) {
is_dle = B_TRUE;
} else {
return (0);
}
if (is_dle)
ret = zfs_deliver_dle(nvl);
else if (is_check)
ret = zfs_deliver_check(nvl);
else
ret = zfs_deliver_add(nvl, is_lofi);
return (ret);
}
/*ARGSUSED*/
static void *
zfs_enum_pools(void *arg)
{
(void) zpool_iter(g_zfshdl, zfs_unavail_pool, (void *)&g_pool_list);
/*
* Linux - instead of using a thread pool, each list entry
* will spawn a thread when an unavailable pool transitions
* to available. zfs_slm_fini will wait for these threads.
*/
g_enumeration_done = B_TRUE;
return (NULL);
}
/*
* called from zed daemon at startup
*
* sent messages from zevents or udev monitor
*
* For now, each agent has its own libzfs instance
*/
int
zfs_slm_init()
{
if ((g_zfshdl = libzfs_init()) == NULL)
return (-1);
/*
* collect a list of unavailable pools (asynchronously,
* since this can take a while)
*/
list_create(&g_pool_list, sizeof (struct unavailpool),
offsetof(struct unavailpool, uap_node));
if (pthread_create(&g_zfs_tid, NULL, zfs_enum_pools, NULL) != 0) {
list_destroy(&g_pool_list);
libzfs_fini(g_zfshdl);
return (-1);
}
list_create(&g_device_list, sizeof (struct pendingdev),
offsetof(struct pendingdev, pd_node));
return (0);
}
void
zfs_slm_fini()
{
unavailpool_t *pool;
pendingdev_t *device;
/* wait for zfs_enum_pools thread to complete */
(void) pthread_join(g_zfs_tid, NULL);
/* destroy the thread pool */
if (g_tpool != NULL) {
tpool_wait(g_tpool);
tpool_destroy(g_tpool);
}
while ((pool = (list_head(&g_pool_list))) != NULL) {
list_remove(&g_pool_list, pool);
zpool_close(pool->uap_zhp);
free(pool);
}
list_destroy(&g_pool_list);
while ((device = (list_head(&g_device_list))) != NULL) {
list_remove(&g_device_list, device);
free(device);
}
list_destroy(&g_device_list);
libzfs_fini(g_zfshdl);
}
void
zfs_slm_event(const char *class, const char *subclass, nvlist_t *nvl)
{
zed_log_msg(LOG_INFO, "zfs_slm_event: %s.%s", class, subclass);
(void) zfs_slm_deliver_event(class, subclass, nvl);
}

557
zfs-2.0.0-rc6/cmd/zed/agents/zfs_retire.c Normal file
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@ -0,0 +1,557 @@
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2006, 2010, Oracle and/or its affiliates. All rights reserved.
*
* Copyright (c) 2016, Intel Corporation.
* Copyright (c) 2018, loli10K <ezomori.nozomu@gmail.com>
*/
/*
* The ZFS retire agent is responsible for managing hot spares across all pools.
* When we see a device fault or a device removal, we try to open the associated
* pool and look for any hot spares. We iterate over any available hot spares
* and attempt a 'zpool replace' for each one.
*
* For vdevs diagnosed as faulty, the agent is also responsible for proactively
* marking the vdev FAULTY (for I/O errors) or DEGRADED (for checksum errors).
*/
#include <sys/fs/zfs.h>
#include <sys/fm/protocol.h>
#include <sys/fm/fs/zfs.h>
#include <libzfs.h>
#include <string.h>
#include "zfs_agents.h"
#include "fmd_api.h"
typedef struct zfs_retire_repaired {
struct zfs_retire_repaired *zrr_next;
uint64_t zrr_pool;
uint64_t zrr_vdev;
} zfs_retire_repaired_t;
typedef struct zfs_retire_data {
libzfs_handle_t *zrd_hdl;
zfs_retire_repaired_t *zrd_repaired;
} zfs_retire_data_t;
static void
zfs_retire_clear_data(fmd_hdl_t *hdl, zfs_retire_data_t *zdp)
{
zfs_retire_repaired_t *zrp;
while ((zrp = zdp->zrd_repaired) != NULL) {
zdp->zrd_repaired = zrp->zrr_next;
fmd_hdl_free(hdl, zrp, sizeof (zfs_retire_repaired_t));
}
}
/*
* Find a pool with a matching GUID.
*/
typedef struct find_cbdata {
uint64_t cb_guid;
zpool_handle_t *cb_zhp;
nvlist_t *cb_vdev;
} find_cbdata_t;
static int
find_pool(zpool_handle_t *zhp, void *data)
{
find_cbdata_t *cbp = data;
if (cbp->cb_guid ==
zpool_get_prop_int(zhp, ZPOOL_PROP_GUID, NULL)) {
cbp->cb_zhp = zhp;
return (1);
}
zpool_close(zhp);
return (0);
}
/*
* Find a vdev within a tree with a matching GUID.
*/
static nvlist_t *
find_vdev(libzfs_handle_t *zhdl, nvlist_t *nv, uint64_t search_guid)
{
uint64_t guid;
nvlist_t **child;
uint_t c, children;
nvlist_t *ret;
if (nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) == 0 &&
guid == search_guid) {
fmd_hdl_debug(fmd_module_hdl("zfs-retire"),
"matched vdev %llu", guid);
return (nv);
}
if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN,
&child, &children) != 0)
return (NULL);
for (c = 0; c < children; c++) {
if ((ret = find_vdev(zhdl, child[c], search_guid)) != NULL)
return (ret);
}
if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_L2CACHE,
&child, &children) != 0)
return (NULL);
for (c = 0; c < children; c++) {
if ((ret = find_vdev(zhdl, child[c], search_guid)) != NULL)
return (ret);
}
if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_SPARES,
&child, &children) != 0)
return (NULL);
for (c = 0; c < children; c++) {
if ((ret = find_vdev(zhdl, child[c], search_guid)) != NULL)
return (ret);
}
return (NULL);
}
/*
* Given a (pool, vdev) GUID pair, find the matching pool and vdev.
*/
static zpool_handle_t *
find_by_guid(libzfs_handle_t *zhdl, uint64_t pool_guid, uint64_t vdev_guid,
nvlist_t **vdevp)
{
find_cbdata_t cb;
zpool_handle_t *zhp;
nvlist_t *config, *nvroot;
/*
* Find the corresponding pool and make sure the vdev still exists.
*/
cb.cb_guid = pool_guid;
if (zpool_iter(zhdl, find_pool, &cb) != 1)
return (NULL);
zhp = cb.cb_zhp;
config = zpool_get_config(zhp, NULL);
if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
&nvroot) != 0) {
zpool_close(zhp);
return (NULL);
}
if (vdev_guid != 0) {
if ((*vdevp = find_vdev(zhdl, nvroot, vdev_guid)) == NULL) {
zpool_close(zhp);
return (NULL);
}
}
return (zhp);
}
/*
* Given a vdev, attempt to replace it with every known spare until one
* succeeds or we run out of devices to try.
* Return whether we were successful or not in replacing the device.
*/
static boolean_t
replace_with_spare(fmd_hdl_t *hdl, zpool_handle_t *zhp, nvlist_t *vdev)
{
nvlist_t *config, *nvroot, *replacement;
nvlist_t **spares;
uint_t s, nspares;
char *dev_name;
zprop_source_t source;
int ashift;
config = zpool_get_config(zhp, NULL);
if (nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
&nvroot) != 0)
return (B_FALSE);
/*
* Find out if there are any hot spares available in the pool.
*/
if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES,
&spares, &nspares) != 0)
return (B_FALSE);
/*
* lookup "ashift" pool property, we may need it for the replacement
*/
ashift = zpool_get_prop_int(zhp, ZPOOL_PROP_ASHIFT, &source);
replacement = fmd_nvl_alloc(hdl, FMD_SLEEP);
(void) nvlist_add_string(replacement, ZPOOL_CONFIG_TYPE,
VDEV_TYPE_ROOT);
dev_name = zpool_vdev_name(NULL, zhp, vdev, B_FALSE);
/*
* Try to replace each spare, ending when we successfully
* replace it.
*/
for (s = 0; s < nspares; s++) {
char *spare_name;
if (nvlist_lookup_string(spares[s], ZPOOL_CONFIG_PATH,
&spare_name) != 0)
continue;
/* if set, add the "ashift" pool property to the spare nvlist */
if (source != ZPROP_SRC_DEFAULT)
(void) nvlist_add_uint64(spares[s],
ZPOOL_CONFIG_ASHIFT, ashift);
(void) nvlist_add_nvlist_array(replacement,
ZPOOL_CONFIG_CHILDREN, &spares[s], 1);
fmd_hdl_debug(hdl, "zpool_vdev_replace '%s' with spare '%s'",
dev_name, basename(spare_name));
if (zpool_vdev_attach(zhp, dev_name, spare_name,
replacement, B_TRUE, B_FALSE) == 0) {
free(dev_name);
nvlist_free(replacement);
return (B_TRUE);
}
}
free(dev_name);
nvlist_free(replacement);
return (B_FALSE);
}
/*
* Repair this vdev if we had diagnosed a 'fault.fs.zfs.device' and
* ASRU is now usable. ZFS has found the device to be present and
* functioning.
*/
/*ARGSUSED*/
static void
zfs_vdev_repair(fmd_hdl_t *hdl, nvlist_t *nvl)
{
zfs_retire_data_t *zdp = fmd_hdl_getspecific(hdl);
zfs_retire_repaired_t *zrp;
uint64_t pool_guid, vdev_guid;
if (nvlist_lookup_uint64(nvl, FM_EREPORT_PAYLOAD_ZFS_POOL_GUID,
&pool_guid) != 0 || nvlist_lookup_uint64(nvl,
FM_EREPORT_PAYLOAD_ZFS_VDEV_GUID, &vdev_guid) != 0)
return;
/*
* Before checking the state of the ASRU, go through and see if we've
* already made an attempt to repair this ASRU. This list is cleared
* whenever we receive any kind of list event, and is designed to
* prevent us from generating a feedback loop when we attempt repairs
* against a faulted pool. The problem is that checking the unusable
* state of the ASRU can involve opening the pool, which can post
* statechange events but otherwise leave the pool in the faulted
* state. This list allows us to detect when a statechange event is
* due to our own request.
*/
for (zrp = zdp->zrd_repaired; zrp != NULL; zrp = zrp->zrr_next) {
if (zrp->zrr_pool == pool_guid &&
zrp->zrr_vdev == vdev_guid)
return;
}
zrp = fmd_hdl_alloc(hdl, sizeof (zfs_retire_repaired_t), FMD_SLEEP);
zrp->zrr_next = zdp->zrd_repaired;
zrp->zrr_pool = pool_guid;
zrp->zrr_vdev = vdev_guid;
zdp->zrd_repaired = zrp;
fmd_hdl_debug(hdl, "marking repaired vdev %llu on pool %llu",
vdev_guid, pool_guid);
}
/*ARGSUSED*/
static void
zfs_retire_recv(fmd_hdl_t *hdl, fmd_event_t *ep, nvlist_t *nvl,
const char *class)
{
uint64_t pool_guid, vdev_guid;
zpool_handle_t *zhp;
nvlist_t *resource, *fault;
nvlist_t **faults;
uint_t f, nfaults;
zfs_retire_data_t *zdp = fmd_hdl_getspecific(hdl);
libzfs_handle_t *zhdl = zdp->zrd_hdl;
boolean_t fault_device, degrade_device;
boolean_t is_repair;
char *scheme;
nvlist_t *vdev = NULL;
char *uuid;
int repair_done = 0;
boolean_t retire;
boolean_t is_disk;
vdev_aux_t aux;
uint64_t state = 0;
fmd_hdl_debug(hdl, "zfs_retire_recv: '%s'", class);
nvlist_lookup_uint64(nvl, FM_EREPORT_PAYLOAD_ZFS_VDEV_STATE, &state);
/*
* If this is a resource notifying us of device removal then simply
* check for an available spare and continue unless the device is a
* l2arc vdev, in which case we just offline it.
*/
if (strcmp(class, "resource.fs.zfs.removed") == 0 ||
(strcmp(class, "resource.fs.zfs.statechange") == 0 &&
state == VDEV_STATE_REMOVED)) {
char *devtype;
char *devname;
if (nvlist_lookup_uint64(nvl, FM_EREPORT_PAYLOAD_ZFS_POOL_GUID,
&pool_guid) != 0 ||
nvlist_lookup_uint64(nvl, FM_EREPORT_PAYLOAD_ZFS_VDEV_GUID,
&vdev_guid) != 0)
return;
if ((zhp = find_by_guid(zhdl, pool_guid, vdev_guid,
&vdev)) == NULL)
return;
devname = zpool_vdev_name(NULL, zhp, vdev, B_FALSE);
/* Can't replace l2arc with a spare: offline the device */
if (nvlist_lookup_string(nvl, FM_EREPORT_PAYLOAD_ZFS_VDEV_TYPE,
&devtype) == 0 && strcmp(devtype, VDEV_TYPE_L2CACHE) == 0) {
fmd_hdl_debug(hdl, "zpool_vdev_offline '%s'", devname);
zpool_vdev_offline(zhp, devname, B_TRUE);
} else if (!fmd_prop_get_int32(hdl, "spare_on_remove") ||
replace_with_spare(hdl, zhp, vdev) == B_FALSE) {
/* Could not handle with spare */
fmd_hdl_debug(hdl, "no spare for '%s'", devname);
}
free(devname);
zpool_close(zhp);
return;
}
if (strcmp(class, FM_LIST_RESOLVED_CLASS) == 0)
return;
/*
* Note: on Linux statechange events are more than just
* healthy ones so we need to confirm the actual state value.
*/
if (strcmp(class, "resource.fs.zfs.statechange") == 0 &&
state == VDEV_STATE_HEALTHY) {
zfs_vdev_repair(hdl, nvl);
return;
}
if (strcmp(class, "sysevent.fs.zfs.vdev_remove") == 0) {
zfs_vdev_repair(hdl, nvl);
return;
}
zfs_retire_clear_data(hdl, zdp);
if (strcmp(class, FM_LIST_REPAIRED_CLASS) == 0)
is_repair = B_TRUE;
else
is_repair = B_FALSE;
/*
* We subscribe to zfs faults as well as all repair events.
*/
if (nvlist_lookup_nvlist_array(nvl, FM_SUSPECT_FAULT_LIST,
&faults, &nfaults) != 0)
return;
for (f = 0; f < nfaults; f++) {
fault = faults[f];
fault_device = B_FALSE;
degrade_device = B_FALSE;
is_disk = B_FALSE;
if (nvlist_lookup_boolean_value(fault, FM_SUSPECT_RETIRE,
&retire) == 0 && retire == 0)
continue;
/*
* While we subscribe to fault.fs.zfs.*, we only take action
* for faults targeting a specific vdev (open failure or SERD
* failure). We also subscribe to fault.io.* events, so that
* faulty disks will be faulted in the ZFS configuration.
*/
if (fmd_nvl_class_match(hdl, fault, "fault.fs.zfs.vdev.io")) {
fault_device = B_TRUE;
} else if (fmd_nvl_class_match(hdl, fault,
"fault.fs.zfs.vdev.checksum")) {
degrade_device = B_TRUE;
} else if (fmd_nvl_class_match(hdl, fault,
"fault.fs.zfs.device")) {
fault_device = B_FALSE;
} else if (fmd_nvl_class_match(hdl, fault, "fault.io.*")) {
is_disk = B_TRUE;
fault_device = B_TRUE;
} else {
continue;
}
if (is_disk) {
continue;
} else {
/*
* This is a ZFS fault. Lookup the resource, and
* attempt to find the matching vdev.
*/
if (nvlist_lookup_nvlist(fault, FM_FAULT_RESOURCE,
&resource) != 0 ||
nvlist_lookup_string(resource, FM_FMRI_SCHEME,
&scheme) != 0)
continue;
if (strcmp(scheme, FM_FMRI_SCHEME_ZFS) != 0)
continue;
if (nvlist_lookup_uint64(resource, FM_FMRI_ZFS_POOL,
&pool_guid) != 0)
continue;
if (nvlist_lookup_uint64(resource, FM_FMRI_ZFS_VDEV,
&vdev_guid) != 0) {
if (is_repair)
vdev_guid = 0;
else
continue;
}
if ((zhp = find_by_guid(zhdl, pool_guid, vdev_guid,
&vdev)) == NULL)
continue;
aux = VDEV_AUX_ERR_EXCEEDED;
}
if (vdev_guid == 0) {
/*
* For pool-level repair events, clear the entire pool.
*/
fmd_hdl_debug(hdl, "zpool_clear of pool '%s'",
zpool_get_name(zhp));
(void) zpool_clear(zhp, NULL, NULL);
zpool_close(zhp);
continue;
}
/*
* If this is a repair event, then mark the vdev as repaired and
* continue.
*/
if (is_repair) {
repair_done = 1;
fmd_hdl_debug(hdl, "zpool_clear of pool '%s' vdev %llu",
zpool_get_name(zhp), vdev_guid);
(void) zpool_vdev_clear(zhp, vdev_guid);
zpool_close(zhp);
continue;
}
/*
* Actively fault the device if needed.
*/
if (fault_device)
(void) zpool_vdev_fault(zhp, vdev_guid, aux);
if (degrade_device)
(void) zpool_vdev_degrade(zhp, vdev_guid, aux);
if (fault_device || degrade_device)
fmd_hdl_debug(hdl, "zpool_vdev_%s: vdev %llu on '%s'",
fault_device ? "fault" : "degrade", vdev_guid,
zpool_get_name(zhp));
/*
* Attempt to substitute a hot spare.
*/
(void) replace_with_spare(hdl, zhp, vdev);
zpool_close(zhp);
}
if (strcmp(class, FM_LIST_REPAIRED_CLASS) == 0 && repair_done &&
nvlist_lookup_string(nvl, FM_SUSPECT_UUID, &uuid) == 0)
fmd_case_uuresolved(hdl, uuid);
}
static const fmd_hdl_ops_t fmd_ops = {
zfs_retire_recv, /* fmdo_recv */
NULL, /* fmdo_timeout */
NULL, /* fmdo_close */
NULL, /* fmdo_stats */
NULL, /* fmdo_gc */
};
static const fmd_prop_t fmd_props[] = {
{ "spare_on_remove", FMD_TYPE_BOOL, "true" },
{ NULL, 0, NULL }
};
static const fmd_hdl_info_t fmd_info = {
"ZFS Retire Agent", "1.0", &fmd_ops, fmd_props
};
void
_zfs_retire_init(fmd_hdl_t *hdl)
{
zfs_retire_data_t *zdp;
libzfs_handle_t *zhdl;
if ((zhdl = libzfs_init()) == NULL)
return;
if (fmd_hdl_register(hdl, FMD_API_VERSION, &fmd_info) != 0) {
libzfs_fini(zhdl);
return;
}
zdp = fmd_hdl_zalloc(hdl, sizeof (zfs_retire_data_t), FMD_SLEEP);
zdp->zrd_hdl = zhdl;
fmd_hdl_setspecific(hdl, zdp);
}
void
_zfs_retire_fini(fmd_hdl_t *hdl)
{
zfs_retire_data_t *zdp = fmd_hdl_getspecific(hdl);
if (zdp != NULL) {
zfs_retire_clear_data(hdl, zdp);
libzfs_fini(zdp->zrd_hdl);
fmd_hdl_free(hdl, zdp, sizeof (zfs_retire_data_t));
}
}

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/*
* This file is part of the ZFS Event Daemon (ZED).
*
* Developed at Lawrence Livermore National Laboratory (LLNL-CODE-403049).
* Copyright (C) 2013-2014 Lawrence Livermore National Security, LLC.
* Refer to the ZoL git commit log for authoritative copyright attribution.
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License Version 1.0 (CDDL-1.0).
* You can obtain a copy of the license from the top-level file
* "OPENSOLARIS.LICENSE" or at <http://opensource.org/licenses/CDDL-1.0>.
* You may not use this file except in compliance with the license.
*/
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <unistd.h>
#include "zed.h"
#include "zed_conf.h"
#include "zed_event.h"
#include "zed_file.h"
#include "zed_log.h"
static volatile sig_atomic_t _got_exit = 0;
static volatile sig_atomic_t _got_hup = 0;
/*
* Signal handler for SIGINT & SIGTERM.
*/
static void
_exit_handler(int signum)
{
_got_exit = 1;
}
/*
* Signal handler for SIGHUP.
*/
static void
_hup_handler(int signum)
{
_got_hup = 1;
}
/*
* Register signal handlers.
*/
static void
_setup_sig_handlers(void)
{
struct sigaction sa;
if (sigemptyset(&sa.sa_mask) < 0)
zed_log_die("Failed to initialize sigset");
sa.sa_flags = SA_RESTART;
sa.sa_handler = SIG_IGN;
if (sigaction(SIGPIPE, &sa, NULL) < 0)
zed_log_die("Failed to ignore SIGPIPE");
sa.sa_handler = _exit_handler;
if (sigaction(SIGINT, &sa, NULL) < 0)
zed_log_die("Failed to register SIGINT handler");
if (sigaction(SIGTERM, &sa, NULL) < 0)
zed_log_die("Failed to register SIGTERM handler");
sa.sa_handler = _hup_handler;
if (sigaction(SIGHUP, &sa, NULL) < 0)
zed_log_die("Failed to register SIGHUP handler");
}
/*
* Lock all current and future pages in the virtual memory address space.
* Access to locked pages will never be delayed by a page fault.
*
* EAGAIN is tested up to max_tries in case this is a transient error.
*
* Note that memory locks are not inherited by a child created via fork()
* and are automatically removed during an execve(). As such, this must
* be called after the daemon fork()s (when running in the background).
*/
static void
_lock_memory(void)
{
#if HAVE_MLOCKALL
int i = 0;
const int max_tries = 10;
for (i = 0; i < max_tries; i++) {
if (mlockall(MCL_CURRENT | MCL_FUTURE) == 0) {
zed_log_msg(LOG_INFO, "Locked all pages in memory");
return;
}
if (errno != EAGAIN)
break;
}
zed_log_die("Failed to lock memory pages: %s", strerror(errno));
#else /* HAVE_MLOCKALL */
zed_log_die("Failed to lock memory pages: mlockall() not supported");
#endif /* HAVE_MLOCKALL */
}
/*
* Start daemonization of the process including the double fork().
*
* The parent process will block here until _finish_daemonize() is called
* (in the grandchild process), at which point the parent process will exit.
* This prevents the parent process from exiting until initialization is
* complete.
*/
static void
_start_daemonize(void)
{
pid_t pid;
struct sigaction sa;
/* Create pipe for communicating with child during daemonization. */
zed_log_pipe_open();
/* Background process and ensure child is not process group leader. */
pid = fork();
if (pid < 0) {
zed_log_die("Failed to create child process: %s",
strerror(errno));
} else if (pid > 0) {
/* Close writes since parent will only read from pipe. */
zed_log_pipe_close_writes();
/* Wait for notification that daemonization is complete. */
zed_log_pipe_wait();
zed_log_pipe_close_reads();
_exit(EXIT_SUCCESS);
}
/* Close reads since child will only write to pipe. */
zed_log_pipe_close_reads();
/* Create independent session and detach from terminal. */
if (setsid() < 0)
zed_log_die("Failed to create new session: %s",
strerror(errno));
/* Prevent child from terminating on HUP when session leader exits. */
if (sigemptyset(&sa.sa_mask) < 0)
zed_log_die("Failed to initialize sigset");
sa.sa_flags = 0;
sa.sa_handler = SIG_IGN;
if (sigaction(SIGHUP, &sa, NULL) < 0)
zed_log_die("Failed to ignore SIGHUP");
/* Ensure process cannot re-acquire terminal. */
pid = fork();
if (pid < 0) {
zed_log_die("Failed to create grandchild process: %s",
strerror(errno));
} else if (pid > 0) {
_exit(EXIT_SUCCESS);
}
}
/*
* Finish daemonization of the process by closing stdin/stdout/stderr.
*
* This must be called at the end of initialization after all external
* communication channels are established and accessible.
*/
static void
_finish_daemonize(void)
{
int devnull;
/* Preserve fd 0/1/2, but discard data to/from stdin/stdout/stderr. */
devnull = open("/dev/null", O_RDWR);
if (devnull < 0)
zed_log_die("Failed to open /dev/null: %s", strerror(errno));
if (dup2(devnull, STDIN_FILENO) < 0)
zed_log_die("Failed to dup /dev/null onto stdin: %s",
strerror(errno));
if (dup2(devnull, STDOUT_FILENO) < 0)
zed_log_die("Failed to dup /dev/null onto stdout: %s",
strerror(errno));
if (dup2(devnull, STDERR_FILENO) < 0)
zed_log_die("Failed to dup /dev/null onto stderr: %s",
strerror(errno));
if ((devnull > STDERR_FILENO) && (close(devnull) < 0))
zed_log_die("Failed to close /dev/null: %s", strerror(errno));
/* Notify parent that daemonization is complete. */
zed_log_pipe_close_writes();
}
/*
* ZFS Event Daemon (ZED).
*/
int
main(int argc, char *argv[])
{
struct zed_conf *zcp;
uint64_t saved_eid;
int64_t saved_etime[2];
zed_log_init(argv[0]);
zed_log_stderr_open(LOG_NOTICE);
zcp = zed_conf_create();
zed_conf_parse_opts(zcp, argc, argv);
if (zcp->do_verbose)
zed_log_stderr_open(LOG_INFO);
if (geteuid() != 0)
zed_log_die("Must be run as root");
zed_conf_parse_file(zcp);
zed_file_close_from(STDERR_FILENO + 1);
(void) umask(0);
if (chdir("/") < 0)
zed_log_die("Failed to change to root directory");
if (zed_conf_scan_dir(zcp) < 0)
exit(EXIT_FAILURE);
if (!zcp->do_foreground) {
_start_daemonize();
zed_log_syslog_open(LOG_DAEMON);
}
_setup_sig_handlers();
if (zcp->do_memlock)
_lock_memory();
if ((zed_conf_write_pid(zcp) < 0) && (!zcp->do_force))
exit(EXIT_FAILURE);
if (!zcp->do_foreground)
_finish_daemonize();
zed_log_msg(LOG_NOTICE,
"ZFS Event Daemon %s-%s (PID %d)",
ZFS_META_VERSION, ZFS_META_RELEASE, (int)getpid());
if (zed_conf_open_state(zcp) < 0)
exit(EXIT_FAILURE);
if (zed_conf_read_state(zcp, &saved_eid, saved_etime) < 0)
exit(EXIT_FAILURE);
idle:
/*
* If -I is specified, attempt to open /dev/zfs repeatedly until
* successful.
*/
do {
if (!zed_event_init(zcp))
break;
/* Wait for some time and try again. tunable? */
sleep(30);
} while (!_got_exit && zcp->do_idle);
if (_got_exit)
goto out;
zed_event_seek(zcp, saved_eid, saved_etime);
while (!_got_exit) {
int rv;
if (_got_hup) {
_got_hup = 0;
(void) zed_conf_scan_dir(zcp);
}
rv = zed_event_service(zcp);
/* ENODEV: When kernel module is unloaded (osx) */
if (rv == ENODEV)
break;
}
zed_log_msg(LOG_NOTICE, "Exiting");
zed_event_fini(zcp);
if (zcp->do_idle && !_got_exit)
goto idle;
out:
zed_conf_destroy(zcp);
zed_log_fini();
exit(EXIT_SUCCESS);
}

1
zfs-2.0.0-rc6/cmd/zed/zed.d/.gitignore vendored Normal file
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history_event-zfs-list-cacher.sh

53
zfs-2.0.0-rc6/cmd/zed/zed.d/Makefile.am Normal file
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include $(top_srcdir)/config/Rules.am
include $(top_srcdir)/config/Substfiles.am
EXTRA_DIST += README
zedconfdir = $(sysconfdir)/zfs/zed.d
dist_zedconf_DATA = \
zed-functions.sh \
zed.rc
zedexecdir = $(zfsexecdir)/zed.d
dist_zedexec_SCRIPTS = \
all-debug.sh \
all-syslog.sh \
data-notify.sh \
generic-notify.sh \
resilver_finish-notify.sh \
scrub_finish-notify.sh \
statechange-led.sh \
statechange-notify.sh \
vdev_clear-led.sh \
vdev_attach-led.sh \
pool_import-led.sh \
resilver_finish-start-scrub.sh \
trim_finish-notify.sh
nodist_zedexec_SCRIPTS = history_event-zfs-list-cacher.sh
SUBSTFILES += $(nodist_zedexec_SCRIPTS)
zedconfdefaults = \
all-syslog.sh \
data-notify.sh \
history_event-zfs-list-cacher.sh \
resilver_finish-notify.sh \
scrub_finish-notify.sh \
statechange-led.sh \
statechange-notify.sh \
vdev_clear-led.sh \
vdev_attach-led.sh \
pool_import-led.sh \
resilver_finish-start-scrub.sh
install-data-hook:
$(MKDIR_P) "$(DESTDIR)$(zedconfdir)"
for f in $(zedconfdefaults); do \
test -f "$(DESTDIR)$(zedconfdir)/$${f}" -o \
-L "$(DESTDIR)$(zedconfdir)/$${f}" || \
ln -s "$(zedexecdir)/$${f}" "$(DESTDIR)$(zedconfdir)"; \
done
chmod 0600 "$(DESTDIR)$(zedconfdir)/zed.rc"

30
zfs-2.0.0-rc6/cmd/zed/zed.d/README Normal file
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Shell scripts are the recommended choice for ZEDLETs that mostly call
other utilities and do relatively little data manipulation.
Shell scripts MUST work on both bash and dash.
Shell scripts MUST run cleanly through ShellCheck:
http://www.shellcheck.net/
General functions reside in "zed-functions.sh". Use them where applicable.
Additional references that may be of use:
Google Shell Style Guide
https://github.com/google/styleguide/blob/gh-pages/shell.xml
Dash as /bin/sh
https://wiki.ubuntu.com/DashAsBinSh
Common shell script mistakes
http://www.pixelbeat.org/programming/shell_script_mistakes.html
Filenames and Pathnames in Shell: How to do it Correctly
http://www.dwheeler.com/essays/filenames-in-shell.html
Autoconf: Portable Shell Programming
https://www.gnu.org/software/autoconf/manual/autoconf.html#Portable-Shell
Please BE CONSISTENT with the existing style, check for errors,
minimize dependencies where possible, try to be portable,
and comment anything non-obvious. Festina lente.

26
zfs-2.0.0-rc6/cmd/zed/zed.d/all-debug.sh Executable file
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#!/bin/sh
#
# Log all environment variables to ZED_DEBUG_LOG.
#
# This can be a useful aid when developing/debugging ZEDLETs since it shows the
# environment variables defined for each zevent.
[ -f "${ZED_ZEDLET_DIR}/zed.rc" ] && . "${ZED_ZEDLET_DIR}/zed.rc"
. "${ZED_ZEDLET_DIR}/zed-functions.sh"
: "${ZED_DEBUG_LOG:="${TMPDIR:="/tmp"}/zed.debug.log"}"
zed_exit_if_ignoring_this_event
lockfile="$(basename -- "${ZED_DEBUG_LOG}").lock"
umask 077
zed_lock "${lockfile}"
exec >> "${ZED_DEBUG_LOG}"
printenv | sort
echo
exec >&-
zed_unlock "${lockfile}"
exit 0

50
zfs-2.0.0-rc6/cmd/zed/zed.d/all-syslog.sh Executable file
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#!/bin/sh
#
# Copyright (C) 2013-2014 Lawrence Livermore National Security, LLC.
# Copyright (c) 2020 by Delphix. All rights reserved.
#
#
# Log the zevent via syslog.
#
[ -f "${ZED_ZEDLET_DIR}/zed.rc" ] && . "${ZED_ZEDLET_DIR}/zed.rc"
. "${ZED_ZEDLET_DIR}/zed-functions.sh"
zed_exit_if_ignoring_this_event
# build a string of name=value pairs for this event
msg="eid=${ZEVENT_EID} class=${ZEVENT_SUBCLASS}"
if [ "${ZED_SYSLOG_DISPLAY_GUIDS}" = "1" ]; then
[ -n "${ZEVENT_POOL_GUID}" ] && msg="${msg} pool_guid=${ZEVENT_POOL_GUID}"
[ -n "${ZEVENT_VDEV_GUID}" ] && msg="${msg} vdev_guid=${ZEVENT_VDEV_GUID}"
else
[ -n "${ZEVENT_POOL}" ] && msg="${msg} pool='${ZEVENT_POOL}'"
[ -n "${ZEVENT_VDEV_PATH}" ] && msg="${msg} vdev=$(basename "${ZEVENT_VDEV_PATH}")"
fi
# log pool state if state is anything other than 'ACTIVE'
[ -n "${ZEVENT_POOL_STATE_STR}" ] && [ "$ZEVENT_POOL_STATE" -ne 0 ] && \
msg="${msg} pool_state=${ZEVENT_POOL_STATE_STR}"
# Log the following payload nvpairs if they are present
[ -n "${ZEVENT_VDEV_STATE_STR}" ] && msg="${msg} vdev_state=${ZEVENT_VDEV_STATE_STR}"
[ -n "${ZEVENT_CKSUM_ALGORITHM}" ] && msg="${msg} algorithm=${ZEVENT_CKSUM_ALGORITHM}"
[ -n "${ZEVENT_ZIO_SIZE}" ] && msg="${msg} size=${ZEVENT_ZIO_SIZE}"
[ -n "${ZEVENT_ZIO_OFFSET}" ] && msg="${msg} offset=${ZEVENT_ZIO_OFFSET}"
[ -n "${ZEVENT_ZIO_PRIORITY}" ] && msg="${msg} priority=${ZEVENT_ZIO_PRIORITY}"
[ -n "${ZEVENT_ZIO_ERR}" ] && msg="${msg} err=${ZEVENT_ZIO_ERR}"
[ -n "${ZEVENT_ZIO_FLAGS}" ] && msg="${msg} flags=$(printf '0x%x' "${ZEVENT_ZIO_FLAGS}")"
# log delays that are >= 10 milisec
[ -n "${ZEVENT_ZIO_DELAY}" ] && [ "$ZEVENT_ZIO_DELAY" -gt 10000000 ] && \
msg="${msg} delay=$((ZEVENT_ZIO_DELAY / 1000000))ms"
# list the bookmark data together
[ -n "${ZEVENT_ZIO_OBJSET}" ] && \
msg="${msg} bookmark=${ZEVENT_ZIO_OBJSET}:${ZEVENT_ZIO_OBJECT}:${ZEVENT_ZIO_LEVEL}:${ZEVENT_ZIO_BLKID}"
zed_log_msg "${msg}"
exit 0

43
zfs-2.0.0-rc6/cmd/zed/zed.d/data-notify.sh Executable file
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#!/bin/sh
#
# Send notification in response to a DATA error.
#
# Only one notification per ZED_NOTIFY_INTERVAL_SECS will be sent for a given
# class/pool/[vdev] combination. This protects against spamming the recipient
# should multiple events occur together in time for the same pool/[vdev].
#
# Exit codes:
# 0: notification sent
# 1: notification failed
# 2: notification not configured
# 3: notification suppressed
# 9: internal error
[ -f "${ZED_ZEDLET_DIR}/zed.rc" ] && . "${ZED_ZEDLET_DIR}/zed.rc"
. "${ZED_ZEDLET_DIR}/zed-functions.sh"
[ -n "${ZEVENT_POOL}" ] || exit 9
[ -n "${ZEVENT_SUBCLASS}" ] || exit 9
[ -n "${ZED_NOTIFY_DATA}" ] || exit 3
rate_limit_tag="${ZEVENT_POOL};${ZEVENT_VDEV_GUID:-0};${ZEVENT_SUBCLASS};notify"
zed_rate_limit "${rate_limit_tag}" || exit 3
umask 077
note_subject="ZFS ${ZEVENT_SUBCLASS} error for ${ZEVENT_POOL} on $(hostname)"
note_pathname="${TMPDIR:="/tmp"}/$(basename -- "$0").${ZEVENT_EID}.$$"
{
echo "ZFS has detected a data error:"
echo
echo " eid: ${ZEVENT_EID}"
echo " class: ${ZEVENT_SUBCLASS}"
echo " host: $(hostname)"
echo " time: ${ZEVENT_TIME_STRING}"
echo " error: ${ZEVENT_ZIO_ERR}"
echo " objid: ${ZEVENT_ZIO_OBJSET}:${ZEVENT_ZIO_OBJECT}"
echo " pool: ${ZEVENT_POOL}"
} > "${note_pathname}"
zed_notify "${note_subject}" "${note_pathname}"; rv=$?
rm -f "${note_pathname}"
exit "${rv}"

54
zfs-2.0.0-rc6/cmd/zed/zed.d/generic-notify.sh Executable file
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#!/bin/sh
#
# Send notification in response to a given zevent.
#
# This is a generic script than can be symlinked to a file in the
# enabled-zedlets directory to have a notification sent when a particular
# class of zevents occurs. The symlink filename must begin with the zevent
# (sub)class string (e.g., "probe_failure-notify.sh" for the "probe_failure"
# subclass). Refer to the zed(8) manpage for details.
#
# Only one notification per ZED_NOTIFY_INTERVAL_SECS will be sent for a given
# class/pool combination. This protects against spamming the recipient
# should multiple events occur together in time for the same pool.
#
# Exit codes:
# 0: notification sent
# 1: notification failed
# 2: notification not configured
# 3: notification suppressed
[ -f "${ZED_ZEDLET_DIR}/zed.rc" ] && . "${ZED_ZEDLET_DIR}/zed.rc"
. "${ZED_ZEDLET_DIR}/zed-functions.sh"
# Rate-limit the notification based in part on the filename.
#
rate_limit_tag="${ZEVENT_POOL};${ZEVENT_SUBCLASS};$(basename -- "$0")"
rate_limit_interval="${ZED_NOTIFY_INTERVAL_SECS}"
zed_rate_limit "${rate_limit_tag}" "${rate_limit_interval}" || exit 3
umask 077
pool_str="${ZEVENT_POOL:+" for ${ZEVENT_POOL}"}"
host_str=" on $(hostname)"
note_subject="ZFS ${ZEVENT_SUBCLASS} event${pool_str}${host_str}"
note_pathname="${TMPDIR:="/tmp"}/$(basename -- "$0").${ZEVENT_EID}.$$"
{
echo "ZFS has posted the following event:"
echo
echo " eid: ${ZEVENT_EID}"
echo " class: ${ZEVENT_SUBCLASS}"
echo " host: $(hostname)"
echo " time: ${ZEVENT_TIME_STRING}"
[ -n "${ZEVENT_VDEV_TYPE}" ] && echo " vtype: ${ZEVENT_VDEV_TYPE}"
[ -n "${ZEVENT_VDEV_PATH}" ] && echo " vpath: ${ZEVENT_VDEV_PATH}"
[ -n "${ZEVENT_VDEV_GUID}" ] && echo " vguid: ${ZEVENT_VDEV_GUID}"
[ -n "${ZEVENT_POOL}" ] && [ -x "${ZPOOL}" ] \
&& "${ZPOOL}" status "${ZEVENT_POOL}"
} > "${note_pathname}"
zed_notify "${note_subject}" "${note_pathname}"; rv=$?
rm -f "${note_pathname}"
exit "${rv}"

85
zfs-2.0.0-rc6/cmd/zed/zed.d/history_event-zfs-list-cacher.sh.in Executable file
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#!/bin/sh
#
# Track changes to enumerated pools for use in early-boot
set -ef
FSLIST_DIR="@sysconfdir@/zfs/zfs-list.cache"
FSLIST_TMP="@runstatedir@/zfs-list.cache.new"
FSLIST="${FSLIST_DIR}/${ZEVENT_POOL}"
# If the pool specific cache file is not writeable, abort
[ -w "${FSLIST}" ] || exit 0
[ -f "${ZED_ZEDLET_DIR}/zed.rc" ] && . "${ZED_ZEDLET_DIR}/zed.rc"
. "${ZED_ZEDLET_DIR}/zed-functions.sh"
zed_exit_if_ignoring_this_event
zed_check_cmd "${ZFS}" sort diff grep
# If we are acting on a snapshot, we have nothing to do
printf '%s' "${ZEVENT_HISTORY_DSNAME}" | grep '@' && exit 0
# We obtain a lock on zfs-list to avoid any simultaneous writes.
# If we run into trouble, log and drop the lock
abort_alter() {
zed_log_msg "Error updating zfs-list.cache!"
zed_unlock zfs-list
}
finished() {
zed_unlock zfs-list
trap - EXIT
exit 0
}
case "${ZEVENT_HISTORY_INTERNAL_NAME}" in
create|"finish receiving"|import|destroy|rename)
;;
export)
zed_lock zfs-list
trap abort_alter EXIT
echo > "${FSLIST}"
finished
;;
set|inherit)
# Only act if one of the tracked properties is altered.
case "${ZEVENT_HISTORY_INTERNAL_STR%%=*}" in
canmount|mountpoint|atime|relatime|devices|exec|readonly| \
setuid|nbmand|encroot|keylocation|org.openzfs.systemd:requires| \
org.openzfs.systemd:requires-mounts-for| \
org.openzfs.systemd:before|org.openzfs.systemd:after| \
org.openzfs.systemd:wanted-by|org.openzfs.systemd:required-by| \
org.openzfs.systemd:nofail|org.openzfs.systemd:ignore \
) ;;
*) exit 0 ;;
esac
;;
*)
# Ignore all other events.
exit 0
;;
esac
zed_lock zfs-list
trap abort_alter EXIT
PROPS="name,mountpoint,canmount,atime,relatime,devices,exec\
,readonly,setuid,nbmand,encroot,keylocation\
,org.openzfs.systemd:requires,org.openzfs.systemd:requires-mounts-for\
,org.openzfs.systemd:before,org.openzfs.systemd:after\
,org.openzfs.systemd:wanted-by,org.openzfs.systemd:required-by\
,org.openzfs.systemd:nofail,org.openzfs.systemd:ignore"
"${ZFS}" list -H -t filesystem -o $PROPS -r "${ZEVENT_POOL}" > "${FSLIST_TMP}"
# Sort the output so that it is stable
sort "${FSLIST_TMP}" -o "${FSLIST_TMP}"
# Don't modify the file if it hasn't changed
diff -q "${FSLIST_TMP}" "${FSLIST}" || mv "${FSLIST_TMP}" "${FSLIST}"
rm -f "${FSLIST_TMP}"
finished

1
zfs-2.0.0-rc6/cmd/zed/zed.d/pool_import-led.sh Symbolic link
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statechange-led.sh

1
zfs-2.0.0-rc6/cmd/zed/zed.d/resilver_finish-notify.sh Symbolic link
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scrub_finish-notify.sh

19
zfs-2.0.0-rc6/cmd/zed/zed.d/resilver_finish-start-scrub.sh Executable file
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#!/bin/sh
# resilver_finish-start-scrub.sh
# Run a scrub after a resilver
#
# Exit codes:
# 1: Internal error
# 2: Script wasn't enabled in zed.rc
# 3: Scrubs are automatically started for sequential resilvers
[ -f "${ZED_ZEDLET_DIR}/zed.rc" ] && . "${ZED_ZEDLET_DIR}/zed.rc"
. "${ZED_ZEDLET_DIR}/zed-functions.sh"
[ "${ZED_SCRUB_AFTER_RESILVER}" = "1" ] || exit 2
[ "${ZEVENT_RESILVER_TYPE}" != "sequential" ] || exit 3
[ -n "${ZEVENT_POOL}" ] || exit 1
[ -n "${ZEVENT_SUBCLASS}" ] || exit 1
zed_check_cmd "${ZPOOL}" || exit 1
zed_log_msg "Starting scrub after resilver on ${ZEVENT_POOL}"
"${ZPOOL}" scrub "${ZEVENT_POOL}"

59
zfs-2.0.0-rc6/cmd/zed/zed.d/scrub_finish-notify.sh Executable file
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#!/bin/sh
#
# Send notification in response to a RESILVER_FINISH or SCRUB_FINISH.
#
# By default, "zpool status" output will only be included for a scrub_finish
# zevent if the pool is not healthy; to always include its output, set
# ZED_NOTIFY_VERBOSE=1.
#
# Exit codes:
# 0: notification sent
# 1: notification failed
# 2: notification not configured
# 3: notification suppressed
# 9: internal error
[ -f "${ZED_ZEDLET_DIR}/zed.rc" ] && . "${ZED_ZEDLET_DIR}/zed.rc"
. "${ZED_ZEDLET_DIR}/zed-functions.sh"
[ -n "${ZEVENT_POOL}" ] || exit 9
[ -n "${ZEVENT_SUBCLASS}" ] || exit 9
if [ "${ZEVENT_SUBCLASS}" = "resilver_finish" ]; then
action="resilver"
elif [ "${ZEVENT_SUBCLASS}" = "scrub_finish" ]; then
action="scrub"
else
zed_log_err "unsupported event class \"${ZEVENT_SUBCLASS}\""
exit 9
fi
zed_check_cmd "${ZPOOL}" || exit 9
# For scrub, suppress notification if the pool is healthy
# and verbosity is not enabled.
#
if [ "${ZEVENT_SUBCLASS}" = "scrub_finish" ]; then
healthy="$("${ZPOOL}" status -x "${ZEVENT_POOL}" \
| grep "'${ZEVENT_POOL}' is healthy")"
[ -n "${healthy}" ] && [ "${ZED_NOTIFY_VERBOSE}" -eq 0 ] && exit 3
fi
umask 077
note_subject="ZFS ${ZEVENT_SUBCLASS} event for ${ZEVENT_POOL} on $(hostname)"
note_pathname="${TMPDIR:="/tmp"}/$(basename -- "$0").${ZEVENT_EID}.$$"
{
echo "ZFS has finished a ${action}:"
echo
echo " eid: ${ZEVENT_EID}"
echo " class: ${ZEVENT_SUBCLASS}"
echo " host: $(hostname)"
echo " time: ${ZEVENT_TIME_STRING}"
"${ZPOOL}" status "${ZEVENT_POOL}"
} > "${note_pathname}"
zed_notify "${note_subject}" "${note_pathname}"; rv=$?
rm -f "${note_pathname}"
exit "${rv}"

177
zfs-2.0.0-rc6/cmd/zed/zed.d/statechange-led.sh Executable file
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#!/bin/sh
#
# Turn off/on the VDEV's enclosure fault LEDs when the pool's state changes.
#
# Turn the VDEV's fault LED on if it becomes FAULTED, DEGRADED or UNAVAIL.
# Turn the LED off when it's back ONLINE again.
#
# This script run in two basic modes:
#
# 1. If $ZEVENT_VDEV_ENC_SYSFS_PATH and $ZEVENT_VDEV_STATE_STR are set, then
# only set the LED for that particular VDEV. This is the case for statechange
# events and some vdev_* events.
#
# 2. If those vars are not set, then check the state of all VDEVs in the pool
# and set the LEDs accordingly. This is the case for pool_import events.
#
# Note that this script requires that your enclosure be supported by the
# Linux SCSI enclosure services (ses) driver. The script will do nothing
# if you have no enclosure, or if your enclosure isn't supported.
#
# Exit codes:
# 0: enclosure led successfully set
# 1: enclosure leds not available
# 2: enclosure leds administratively disabled
# 3: The led sysfs path passed from ZFS does not exist
# 4: $ZPOOL not set
# 5: awk is not installed
[ -f "${ZED_ZEDLET_DIR}/zed.rc" ] && . "${ZED_ZEDLET_DIR}/zed.rc"
. "${ZED_ZEDLET_DIR}/zed-functions.sh"
if [ ! -d /sys/class/enclosure ] ; then
exit 1
fi
if [ "${ZED_USE_ENCLOSURE_LEDS}" != "1" ] ; then
exit 2
fi
zed_check_cmd "$ZPOOL" || exit 4
zed_check_cmd awk || exit 5
# Global used in set_led debug print
vdev=""
# check_and_set_led (file, val)
#
# Read an enclosure sysfs file, and write it if it's not already set to 'val'
#
# Arguments
# file: sysfs file to set (like /sys/class/enclosure/0:0:1:0/SLOT 10/fault)
# val: value to set it to
#
# Return
# 0 on success, 3 on missing sysfs path
#
check_and_set_led()
{
file="$1"
val="$2"
if [ ! -e "$file" ] ; then
return 3
fi
# If another process is accessing the LED when we attempt to update it,
# the update will be lost so retry until the LED actually changes or we
# timeout.
for _ in $(seq 1 5); do
# We want to check the current state first, since writing to the
# 'fault' entry always causes a SES command, even if the
# current state is already what you want.
current=$(cat "${file}")
# On some enclosures if you write 1 to fault, and read it back,
# it will return 2. Treat all non-zero values as 1 for
# simplicity.
if [ "$current" != "0" ] ; then
current=1
fi
if [ "$current" != "$val" ] ; then
echo "$val" > "$file"
zed_log_msg "vdev $vdev set '$file' LED to $val"
else
break
fi
done
}
state_to_val()
{
state="$1"
if [ "$state" = "FAULTED" ] || [ "$state" = "DEGRADED" ] || \
[ "$state" = "UNAVAIL" ] ; then
echo 1
elif [ "$state" = "ONLINE" ] ; then
echo 0
fi
}
# process_pool ([pool])
#
# Iterate through a pool (or pools) and set the VDEV's enclosure slot LEDs to
# the VDEV's state.
#
# Arguments
# pool: Optional pool name. If not specified, iterate though all pools.
#
# Return
# 0 on success, 3 on missing sysfs path
#
process_pool()
{
pool="$1"
rc=0
# Lookup all the current LED values and paths in parallel
#shellcheck disable=SC2016
cmd='echo led_token=$(cat "$VDEV_ENC_SYSFS_PATH/fault"),"$VDEV_ENC_SYSFS_PATH",'
out=$($ZPOOL status -vc "$cmd" "$pool" | grep 'led_token=')
#shellcheck disable=SC2034
echo "$out" | while read -r vdev state read write chksum therest; do
# Read out current LED value and path
tmp=$(echo "$therest" | sed 's/^.*led_token=//g')
vdev_enc_sysfs_path=$(echo "$tmp" | awk -F ',' '{print $2}')
current_val=$(echo "$tmp" | awk -F ',' '{print $1}')
if [ "$current_val" != "0" ] ; then
current_val=1
fi
if [ -z "$vdev_enc_sysfs_path" ] ; then
# Skip anything with no sysfs LED entries
continue
fi
if [ ! -e "$vdev_enc_sysfs_path/fault" ] ; then
#shellcheck disable=SC2030
rc=1
zed_log_msg "vdev $vdev '$file/fault' doesn't exist"
continue;
fi
val=$(state_to_val "$state")
if [ "$current_val" = "$val" ] ; then
# LED is already set correctly
continue;
fi
if ! check_and_set_led "$vdev_enc_sysfs_path/fault" "$val"; then
rc=1
fi
done
#shellcheck disable=SC2031
if [ "$rc" = "0" ] ; then
return 0
else
# We didn't see a sysfs entry that we wanted to set
return 3
fi
}
if [ -n "$ZEVENT_VDEV_ENC_SYSFS_PATH" ] && [ -n "$ZEVENT_VDEV_STATE_STR" ] ; then
# Got a statechange for an individual VDEV
val=$(state_to_val "$ZEVENT_VDEV_STATE_STR")
vdev=$(basename "$ZEVENT_VDEV_PATH")
check_and_set_led "$ZEVENT_VDEV_ENC_SYSFS_PATH/fault" "$val"
else
# Process the entire pool
poolname=$(zed_guid_to_pool "$ZEVENT_POOL_GUID")
process_pool "$poolname"
fi

74
zfs-2.0.0-rc6/cmd/zed/zed.d/statechange-notify.sh Executable file
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#!/bin/sh
#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License Version 1.0 (CDDL-1.0).
# You can obtain a copy of the license from the top-level file
# "OPENSOLARIS.LICENSE" or at <http://opensource.org/licenses/CDDL-1.0>.
# You may not use this file except in compliance with the license.
#
# CDDL HEADER END
#
#
# Send notification in response to a fault induced statechange
#
# ZEVENT_SUBCLASS: 'statechange'
# ZEVENT_VDEV_STATE_STR: 'DEGRADED', 'FAULTED' or 'REMOVED'
#
# Exit codes:
# 0: notification sent
# 1: notification failed
# 2: notification not configured
# 3: statechange not relevant
# 4: statechange string missing (unexpected)
[ -f "${ZED_ZEDLET_DIR}/zed.rc" ] && . "${ZED_ZEDLET_DIR}/zed.rc"
. "${ZED_ZEDLET_DIR}/zed-functions.sh"
[ -n "${ZEVENT_VDEV_STATE_STR}" ] || exit 4
if [ "${ZEVENT_VDEV_STATE_STR}" != "FAULTED" ] \
&& [ "${ZEVENT_VDEV_STATE_STR}" != "DEGRADED" ] \
&& [ "${ZEVENT_VDEV_STATE_STR}" != "REMOVED" ]; then
exit 3
fi
umask 077
note_subject="ZFS device fault for pool ${ZEVENT_POOL_GUID} on $(hostname)"
note_pathname="${TMPDIR:="/tmp"}/$(basename -- "$0").${ZEVENT_EID}.$$"
{
if [ "${ZEVENT_VDEV_STATE_STR}" = "FAULTED" ] ; then
echo "The number of I/O errors associated with a ZFS device exceeded"
echo "acceptable levels. ZFS has marked the device as faulted."
elif [ "${ZEVENT_VDEV_STATE_STR}" = "DEGRADED" ] ; then
echo "The number of checksum errors associated with a ZFS device"
echo "exceeded acceptable levels. ZFS has marked the device as"
echo "degraded."
else
echo "ZFS has detected that a device was removed."
fi
echo
echo " impact: Fault tolerance of the pool may be compromised."
echo " eid: ${ZEVENT_EID}"
echo " class: ${ZEVENT_SUBCLASS}"
echo " state: ${ZEVENT_VDEV_STATE_STR}"
echo " host: $(hostname)"
echo " time: ${ZEVENT_TIME_STRING}"
[ -n "${ZEVENT_VDEV_TYPE}" ] && echo " vtype: ${ZEVENT_VDEV_TYPE}"
[ -n "${ZEVENT_VDEV_PATH}" ] && echo " vpath: ${ZEVENT_VDEV_PATH}"
[ -n "${ZEVENT_VDEV_PHYSPATH}" ] && echo " vphys: ${ZEVENT_VDEV_PHYSPATH}"
[ -n "${ZEVENT_VDEV_GUID}" ] && echo " vguid: ${ZEVENT_VDEV_GUID}"
[ -n "${ZEVENT_VDEV_DEVID}" ] && echo " devid: ${ZEVENT_VDEV_DEVID}"
echo " pool: ${ZEVENT_POOL_GUID}"
} > "${note_pathname}"
zed_notify "${note_subject}" "${note_pathname}"; rv=$?
rm -f "${note_pathname}"
exit "${rv}"

37
zfs-2.0.0-rc6/cmd/zed/zed.d/trim_finish-notify.sh Executable file
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#!/bin/sh
#
# Send notification in response to a TRIM_FINISH. The event
# will be received for each vdev in the pool which was trimmed.
#
# Exit codes:
# 0: notification sent
# 1: notification failed
# 2: notification not configured
# 9: internal error
[ -f "${ZED_ZEDLET_DIR}/zed.rc" ] && . "${ZED_ZEDLET_DIR}/zed.rc"
. "${ZED_ZEDLET_DIR}/zed-functions.sh"
[ -n "${ZEVENT_POOL}" ] || exit 9
[ -n "${ZEVENT_SUBCLASS}" ] || exit 9
zed_check_cmd "${ZPOOL}" || exit 9
umask 077
note_subject="ZFS ${ZEVENT_SUBCLASS} event for ${ZEVENT_POOL} on $(hostname)"
note_pathname="${TMPDIR:="/tmp"}/$(basename -- "$0").${ZEVENT_EID}.$$"
{
echo "ZFS has finished a trim:"
echo
echo " eid: ${ZEVENT_EID}"
echo " class: ${ZEVENT_SUBCLASS}"
echo " host: $(hostname)"
echo " time: ${ZEVENT_TIME_STRING}"
"${ZPOOL}" status -t "${ZEVENT_POOL}"
} > "${note_pathname}"
zed_notify "${note_subject}" "${note_pathname}"; rv=$?
rm -f "${note_pathname}"
exit "${rv}"

1
zfs-2.0.0-rc6/cmd/zed/zed.d/vdev_attach-led.sh Symbolic link
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@ -0,0 +1 @@
statechange-led.sh

1
zfs-2.0.0-rc6/cmd/zed/zed.d/vdev_clear-led.sh Symbolic link
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@ -0,0 +1 @@
statechange-led.sh

538
zfs-2.0.0-rc6/cmd/zed/zed.d/zed-functions.sh Normal file
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#!/bin/sh
# shellcheck disable=SC2039
# zed-functions.sh
#
# ZED helper functions for use in ZEDLETs
# Variable Defaults
#
: "${ZED_LOCKDIR:="/var/lock"}"
: "${ZED_NOTIFY_INTERVAL_SECS:=3600}"
: "${ZED_NOTIFY_VERBOSE:=0}"
: "${ZED_RUNDIR:="/var/run"}"
: "${ZED_SYSLOG_PRIORITY:="daemon.notice"}"
: "${ZED_SYSLOG_TAG:="zed"}"
ZED_FLOCK_FD=8
# zed_check_cmd (cmd, ...)
#
# For each argument given, search PATH for the executable command [cmd].
# Log a message if [cmd] is not found.
#
# Arguments
# cmd: name of executable command for which to search
#
# Return
# 0 if all commands are found in PATH and are executable
# n for a count of the command executables that are not found
#
zed_check_cmd()
{
local cmd
local rv=0
for cmd; do
if ! command -v "${cmd}" >/dev/null 2>&1; then
zed_log_err "\"${cmd}\" not installed"
rv=$((rv + 1))
fi
done
return "${rv}"
}
# zed_log_msg (msg, ...)
#
# Write all argument strings to the system log.
#
# Globals
# ZED_SYSLOG_PRIORITY
# ZED_SYSLOG_TAG
#
# Return
# nothing
#
zed_log_msg()
{
logger -p "${ZED_SYSLOG_PRIORITY}" -t "${ZED_SYSLOG_TAG}" -- "$@"
}
# zed_log_err (msg, ...)
#
# Write an error message to the system log. This message will contain the
# script name, EID, and all argument strings.
#
# Globals
# ZED_SYSLOG_PRIORITY
# ZED_SYSLOG_TAG
# ZEVENT_EID
#
# Return
# nothing
#
zed_log_err()
{
logger -p "${ZED_SYSLOG_PRIORITY}" -t "${ZED_SYSLOG_TAG}" -- "error:" \
"$(basename -- "$0"):""${ZEVENT_EID:+" eid=${ZEVENT_EID}:"}" "$@"
}
# zed_lock (lockfile, [fd])
#
# Obtain an exclusive (write) lock on [lockfile]. If the lock cannot be
# immediately acquired, wait until it becomes available.
#
# Every zed_lock() must be paired with a corresponding zed_unlock().
#
# By default, flock-style locks associate the lockfile with file descriptor 8.
# The bash manpage warns that file descriptors >9 should be used with care as
# they may conflict with file descriptors used internally by the shell. File
# descriptor 9 is reserved for zed_rate_limit(). If concurrent locks are held
# within the same process, they must use different file descriptors (preferably
# decrementing from 8); otherwise, obtaining a new lock with a given file
# descriptor will release the previous lock associated with that descriptor.
#
# Arguments
# lockfile: pathname of the lock file; the lock will be stored in
# ZED_LOCKDIR unless the pathname contains a "/".
# fd: integer for the file descriptor used by flock (OPTIONAL unless holding
# concurrent locks)
#
# Globals
# ZED_FLOCK_FD
# ZED_LOCKDIR
#
# Return
# nothing
#
zed_lock()
{
local lockfile="$1"
local fd="${2:-${ZED_FLOCK_FD}}"
local umask_bak
local err
[ -n "${lockfile}" ] || return
if ! expr "${lockfile}" : '.*/' >/dev/null 2>&1; then
lockfile="${ZED_LOCKDIR}/${lockfile}"
fi
umask_bak="$(umask)"
umask 077
# Obtain a lock on the file bound to the given file descriptor.
#
eval "exec ${fd}> '${lockfile}'"
err="$(flock --exclusive "${fd}" 2>&1)"
# shellcheck disable=SC2181
if [ $? -ne 0 ]; then
zed_log_err "failed to lock \"${lockfile}\": ${err}"
fi
umask "${umask_bak}"
}
# zed_unlock (lockfile, [fd])
#
# Release the lock on [lockfile].
#
# Arguments
# lockfile: pathname of the lock file
# fd: integer for the file descriptor used by flock (must match the file
# descriptor passed to the zed_lock function call)
#
# Globals
# ZED_FLOCK_FD
# ZED_LOCKDIR
#
# Return
# nothing
#
zed_unlock()
{
local lockfile="$1"
local fd="${2:-${ZED_FLOCK_FD}}"
local err
[ -n "${lockfile}" ] || return
if ! expr "${lockfile}" : '.*/' >/dev/null 2>&1; then
lockfile="${ZED_LOCKDIR}/${lockfile}"
fi
# Release the lock and close the file descriptor.
err="$(flock --unlock "${fd}" 2>&1)"
# shellcheck disable=SC2181
if [ $? -ne 0 ]; then
zed_log_err "failed to unlock \"${lockfile}\": ${err}"
fi
eval "exec ${fd}>&-"
}
# zed_notify (subject, pathname)
#
# Send a notification via all available methods.
#
# Arguments
# subject: notification subject
# pathname: pathname containing the notification message (OPTIONAL)
#
# Return
# 0: notification succeeded via at least one method
# 1: notification failed
# 2: no notification methods configured
#
zed_notify()
{
local subject="$1"
local pathname="$2"
local num_success=0
local num_failure=0
zed_notify_email "${subject}" "${pathname}"; rv=$?
[ "${rv}" -eq 0 ] && num_success=$((num_success + 1))
[ "${rv}" -eq 1 ] && num_failure=$((num_failure + 1))
zed_notify_pushbullet "${subject}" "${pathname}"; rv=$?
[ "${rv}" -eq 0 ] && num_success=$((num_success + 1))
[ "${rv}" -eq 1 ] && num_failure=$((num_failure + 1))
zed_notify_slack_webhook "${subject}" "${pathname}"; rv=$?
[ "${rv}" -eq 0 ] && num_success=$((num_success + 1))
[ "${rv}" -eq 1 ] && num_failure=$((num_failure + 1))
[ "${num_success}" -gt 0 ] && return 0
[ "${num_failure}" -gt 0 ] && return 1
return 2
}
# zed_notify_email (subject, pathname)
#
# Send a notification via email to the address specified by ZED_EMAIL_ADDR.
#
# Requires the mail executable to be installed in the standard PATH, or
# ZED_EMAIL_PROG to be defined with the pathname of an executable capable of
# reading a message body from stdin.
#
# Command-line options to the mail executable can be specified in
# ZED_EMAIL_OPTS. This undergoes the following keyword substitutions:
# - @ADDRESS@ is replaced with the space-delimited recipient email address(es)
# - @SUBJECT@ is replaced with the notification subject
#
# Arguments
# subject: notification subject
# pathname: pathname containing the notification message (OPTIONAL)
#
# Globals
# ZED_EMAIL_PROG
# ZED_EMAIL_OPTS
# ZED_EMAIL_ADDR
#
# Return
# 0: notification sent
# 1: notification failed
# 2: not configured
#
zed_notify_email()
{
local subject="$1"
local pathname="${2:-"/dev/null"}"
: "${ZED_EMAIL_PROG:="mail"}"
: "${ZED_EMAIL_OPTS:="-s '@SUBJECT@' @ADDRESS@"}"
# For backward compatibility with ZED_EMAIL.
if [ -n "${ZED_EMAIL}" ] && [ -z "${ZED_EMAIL_ADDR}" ]; then
ZED_EMAIL_ADDR="${ZED_EMAIL}"
fi
[ -n "${ZED_EMAIL_ADDR}" ] || return 2
zed_check_cmd "${ZED_EMAIL_PROG}" || return 1
[ -n "${subject}" ] || return 1
if [ ! -r "${pathname}" ]; then
zed_log_err \
"$(basename "${ZED_EMAIL_PROG}") cannot read \"${pathname}\""
return 1
fi
ZED_EMAIL_OPTS="$(echo "${ZED_EMAIL_OPTS}" \
| sed -e "s/@ADDRESS@/${ZED_EMAIL_ADDR}/g" \
-e "s/@SUBJECT@/${subject}/g")"
# shellcheck disable=SC2086
eval "${ZED_EMAIL_PROG}" ${ZED_EMAIL_OPTS} < "${pathname}" >/dev/null 2>&1
rv=$?
if [ "${rv}" -ne 0 ]; then
zed_log_err "$(basename "${ZED_EMAIL_PROG}") exit=${rv}"
return 1
fi
return 0
}
# zed_notify_pushbullet (subject, pathname)
#
# Send a notification via Pushbullet <https://www.pushbullet.com/>.
# The access token (ZED_PUSHBULLET_ACCESS_TOKEN) identifies this client to the
# Pushbullet server. The optional channel tag (ZED_PUSHBULLET_CHANNEL_TAG) is
# for pushing to notification feeds that can be subscribed to; if a channel is
# not defined, push notifications will instead be sent to all devices
# associated with the account specified by the access token.
#
# Requires awk, curl, and sed executables to be installed in the standard PATH.
#
# References
# https://docs.pushbullet.com/
# https://www.pushbullet.com/security
#
# Arguments
# subject: notification subject
# pathname: pathname containing the notification message (OPTIONAL)
#
# Globals
# ZED_PUSHBULLET_ACCESS_TOKEN
# ZED_PUSHBULLET_CHANNEL_TAG
#
# Return
# 0: notification sent
# 1: notification failed
# 2: not configured
#
zed_notify_pushbullet()
{
local subject="$1"
local pathname="${2:-"/dev/null"}"
local msg_body
local msg_tag
local msg_json
local msg_out
local msg_err
local url="https://api.pushbullet.com/v2/pushes"
[ -n "${ZED_PUSHBULLET_ACCESS_TOKEN}" ] || return 2
[ -n "${subject}" ] || return 1
if [ ! -r "${pathname}" ]; then
zed_log_err "pushbullet cannot read \"${pathname}\""
return 1
fi
zed_check_cmd "awk" "curl" "sed" || return 1
# Escape the following characters in the message body for JSON:
# newline, backslash, double quote, horizontal tab, vertical tab,
# and carriage return.
#
msg_body="$(awk '{ ORS="\\n" } { gsub(/\\/, "\\\\"); gsub(/"/, "\\\"");
gsub(/\t/, "\\t"); gsub(/\f/, "\\f"); gsub(/\r/, "\\r"); print }' \
"${pathname}")"
# Push to a channel if one is configured.
#
[ -n "${ZED_PUSHBULLET_CHANNEL_TAG}" ] && msg_tag="$(printf \
'"channel_tag": "%s", ' "${ZED_PUSHBULLET_CHANNEL_TAG}")"
# Construct the JSON message for pushing a note.
#
msg_json="$(printf '{%s"type": "note", "title": "%s", "body": "%s"}' \
"${msg_tag}" "${subject}" "${msg_body}")"
# Send the POST request and check for errors.
#
msg_out="$(curl -u "${ZED_PUSHBULLET_ACCESS_TOKEN}:" -X POST "${url}" \
--header "Content-Type: application/json" --data-binary "${msg_json}" \
2>/dev/null)"; rv=$?
if [ "${rv}" -ne 0 ]; then
zed_log_err "curl exit=${rv}"
return 1
fi
msg_err="$(echo "${msg_out}" \
| sed -n -e 's/.*"error" *:.*"message" *: *"\([^"]*\)".*/\1/p')"
if [ -n "${msg_err}" ]; then
zed_log_err "pushbullet \"${msg_err}"\"
return 1
fi
return 0
}
# zed_notify_slack_webhook (subject, pathname)
#
# Notification via Slack Webhook <https://api.slack.com/incoming-webhooks>.
# The Webhook URL (ZED_SLACK_WEBHOOK_URL) identifies this client to the
# Slack channel.
#
# Requires awk, curl, and sed executables to be installed in the standard PATH.
#
# References
# https://api.slack.com/incoming-webhooks
#
# Arguments
# subject: notification subject
# pathname: pathname containing the notification message (OPTIONAL)
#
# Globals
# ZED_SLACK_WEBHOOK_URL
#
# Return
# 0: notification sent
# 1: notification failed
# 2: not configured
#
zed_notify_slack_webhook()
{
[ -n "${ZED_SLACK_WEBHOOK_URL}" ] || return 2
local subject="$1"
local pathname="${2:-"/dev/null"}"
local msg_body
local msg_tag
local msg_json
local msg_out
local msg_err
local url="${ZED_SLACK_WEBHOOK_URL}"
[ -n "${subject}" ] || return 1
if [ ! -r "${pathname}" ]; then
zed_log_err "slack webhook cannot read \"${pathname}\""
return 1
fi
zed_check_cmd "awk" "curl" "sed" || return 1
# Escape the following characters in the message body for JSON:
# newline, backslash, double quote, horizontal tab, vertical tab,
# and carriage return.
#
msg_body="$(awk '{ ORS="\\n" } { gsub(/\\/, "\\\\"); gsub(/"/, "\\\"");
gsub(/\t/, "\\t"); gsub(/\f/, "\\f"); gsub(/\r/, "\\r"); print }' \
"${pathname}")"
# Construct the JSON message for posting.
#
msg_json="$(printf '{"text": "*%s*\n%s"}' "${subject}" "${msg_body}" )"
# Send the POST request and check for errors.
#
msg_out="$(curl -X POST "${url}" \
--header "Content-Type: application/json" --data-binary "${msg_json}" \
2>/dev/null)"; rv=$?
if [ "${rv}" -ne 0 ]; then
zed_log_err "curl exit=${rv}"
return 1
fi
msg_err="$(echo "${msg_out}" \
| sed -n -e 's/.*"error" *:.*"message" *: *"\([^"]*\)".*/\1/p')"
if [ -n "${msg_err}" ]; then
zed_log_err "slack webhook \"${msg_err}"\"
return 1
fi
return 0
}
# zed_rate_limit (tag, [interval])
#
# Check whether an event of a given type [tag] has already occurred within the
# last [interval] seconds.
#
# This function obtains a lock on the statefile using file descriptor 9.
#
# Arguments
# tag: arbitrary string for grouping related events to rate-limit
# interval: time interval in seconds (OPTIONAL)
#
# Globals
# ZED_NOTIFY_INTERVAL_SECS
# ZED_RUNDIR
#
# Return
# 0 if the event should be processed
# 1 if the event should be dropped
#
# State File Format
# time;tag
#
zed_rate_limit()
{
local tag="$1"
local interval="${2:-${ZED_NOTIFY_INTERVAL_SECS}}"
local lockfile="zed.zedlet.state.lock"
local lockfile_fd=9
local statefile="${ZED_RUNDIR}/zed.zedlet.state"
local time_now
local time_prev
local umask_bak
local rv=0
[ -n "${tag}" ] || return 0
zed_lock "${lockfile}" "${lockfile_fd}"
time_now="$(date +%s)"
time_prev="$(grep -E "^[0-9]+;${tag}\$" "${statefile}" 2>/dev/null \
| tail -1 | cut -d\; -f1)"
if [ -n "${time_prev}" ] \
&& [ "$((time_now - time_prev))" -lt "${interval}" ]; then
rv=1
else
umask_bak="$(umask)"
umask 077
grep -E -v "^[0-9]+;${tag}\$" "${statefile}" 2>/dev/null \
> "${statefile}.$$"
echo "${time_now};${tag}" >> "${statefile}.$$"
mv -f "${statefile}.$$" "${statefile}"
umask "${umask_bak}"
fi
zed_unlock "${lockfile}" "${lockfile_fd}"
return "${rv}"
}
# zed_guid_to_pool (guid)
#
# Convert a pool GUID into its pool name (like "tank")
# Arguments
# guid: pool GUID (decimal or hex)
#
# Return
# Pool name
#
zed_guid_to_pool()
{
if [ -z "$1" ] ; then
return
fi
guid=$(printf "%llu" "$1")
if [ -n "$guid" ] ; then
$ZPOOL get -H -ovalue,name guid | awk '$1=='"$guid"' {print $2}'
fi
}
# zed_exit_if_ignoring_this_event
#
# Exit the script if we should ignore this event, as determined by
# $ZED_SYSLOG_SUBCLASS_INCLUDE and $ZED_SYSLOG_SUBCLASS_EXCLUDE in zed.rc.
# This function assumes you've imported the normal zed variables.
zed_exit_if_ignoring_this_event()
{
if [ -n "${ZED_SYSLOG_SUBCLASS_INCLUDE}" ]; then
eval "case ${ZEVENT_SUBCLASS} in
${ZED_SYSLOG_SUBCLASS_INCLUDE});;
*) exit 0;;
esac"
elif [ -n "${ZED_SYSLOG_SUBCLASS_EXCLUDE}" ]; then
eval "case ${ZEVENT_SUBCLASS} in
${ZED_SYSLOG_SUBCLASS_EXCLUDE}) exit 0;;
*);;
esac"
fi
}

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##
# zed.rc
#
# This file should be owned by root and permissioned 0600.
##
##
# Absolute path to the debug output file.
#
#ZED_DEBUG_LOG="/tmp/zed.debug.log"
##
# Email address of the zpool administrator for receipt of notifications;
# multiple addresses can be specified if they are delimited by whitespace.
# Email will only be sent if ZED_EMAIL_ADDR is defined.
# Disabled by default; uncomment to enable.
#
#ZED_EMAIL_ADDR="root"
##
# Name or path of executable responsible for sending notifications via email;
# the mail program must be capable of reading a message body from stdin.
# Email will only be sent if ZED_EMAIL_ADDR is defined.
#
#ZED_EMAIL_PROG="mail"
##
# Command-line options for ZED_EMAIL_PROG.
# The string @ADDRESS@ will be replaced with the recipient email address(es).
# The string @SUBJECT@ will be replaced with the notification subject;
# this should be protected with quotes to prevent word-splitting.
# Email will only be sent if ZED_EMAIL_ADDR is defined.
#
#ZED_EMAIL_OPTS="-s '@SUBJECT@' @ADDRESS@"
##
# Default directory for zed lock files.
#
#ZED_LOCKDIR="/var/lock"
##
# Minimum number of seconds between notifications for a similar event.
#
#ZED_NOTIFY_INTERVAL_SECS=3600
##
# Notification verbosity.
# If set to 0, suppress notification if the pool is healthy.
# If set to 1, send notification regardless of pool health.
#
#ZED_NOTIFY_VERBOSE=0
##
# Send notifications for 'ereport.fs.zfs.data' events.
# Disabled by default, any non-empty value will enable the feature.
#
#ZED_NOTIFY_DATA=
##
# Pushbullet access token.
# This grants full access to your account -- protect it accordingly!
# <https://www.pushbullet.com/get-started>
# <https://www.pushbullet.com/account>
# Disabled by default; uncomment to enable.
#
#ZED_PUSHBULLET_ACCESS_TOKEN=""
##
# Pushbullet channel tag for push notification feeds that can be subscribed to.
# <https://www.pushbullet.com/my-channel>
# If not defined, push notifications will instead be sent to all devices
# associated with the account specified by the access token.
# Disabled by default; uncomment to enable.
#
#ZED_PUSHBULLET_CHANNEL_TAG=""
##
# Slack Webhook URL.
# This allows posting to the given channel and includes an access token.
# <https://api.slack.com/incoming-webhooks>
# Disabled by default; uncomment to enable.
#
#ZED_SLACK_WEBHOOK_URL=""
##
# Default directory for zed state files.
#
#ZED_RUNDIR="/var/run"
##
# Turn on/off enclosure LEDs when drives get DEGRADED/FAULTED. This works for
# device mapper and multipath devices as well. Your enclosure must be
# supported by the Linux SES driver for this to work.
#
ZED_USE_ENCLOSURE_LEDS=1
##
# Run a scrub after every resilver
# Disabled by default, 1 to enable and 0 to disable.
#ZED_SCRUB_AFTER_RESILVER=0
##
# The syslog priority (e.g., specified as a "facility.level" pair).
#
#ZED_SYSLOG_PRIORITY="daemon.notice"
##
# The syslog tag for marking zed events.
#
#ZED_SYSLOG_TAG="zed"
##
# Which set of event subclasses to log
# By default, events from all subclasses are logged.
# If ZED_SYSLOG_SUBCLASS_INCLUDE is set, only subclasses
# matching the pattern are logged. Use the pipe symbol (|)
# or shell wildcards (*, ?) to match multiple subclasses.
# Otherwise, if ZED_SYSLOG_SUBCLASS_EXCLUDE is set, the
# matching subclasses are excluded from logging.
#ZED_SYSLOG_SUBCLASS_INCLUDE="checksum|scrub_*|vdev.*"
ZED_SYSLOG_SUBCLASS_EXCLUDE="history_event"
##
# Use GUIDs instead of names when logging pool and vdevs
# Disabled by default, 1 to enable and 0 to disable.
#ZED_SYSLOG_DISPLAY_GUIDS=1

58
zfs-2.0.0-rc6/cmd/zed/zed.h Normal file
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/*
* This file is part of the ZFS Event Daemon (ZED).
*
* Developed at Lawrence Livermore National Laboratory (LLNL-CODE-403049).
* Copyright (C) 2013-2014 Lawrence Livermore National Security, LLC.
* Refer to the ZoL git commit log for authoritative copyright attribution.
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License Version 1.0 (CDDL-1.0).
* You can obtain a copy of the license from the top-level file
* "OPENSOLARIS.LICENSE" or at <http://opensource.org/licenses/CDDL-1.0>.
* You may not use this file except in compliance with the license.
*/
#ifndef ZED_H
#define ZED_H
/*
* Absolute path for the default zed configuration file.
*/
#define ZED_CONF_FILE SYSCONFDIR "/zfs/zed.conf"
/*
* Absolute path for the default zed pid file.
*/
#define ZED_PID_FILE RUNSTATEDIR "/zed.pid"
/*
* Absolute path for the default zed state file.
*/
#define ZED_STATE_FILE RUNSTATEDIR "/zed.state"
/*
* Absolute path for the default zed zedlet directory.
*/
#define ZED_ZEDLET_DIR SYSCONFDIR "/zfs/zed.d"
/*
* Reserved for future use.
*/
#define ZED_MAX_EVENTS 0
/*
* Reserved for future use.
*/
#define ZED_MIN_EVENTS 0
/*
* String prefix for ZED variables passed via environment variables.
*/
#define ZED_VAR_PREFIX "ZED_"
/*
* String prefix for ZFS event names passed via environment variables.
*/
#define ZEVENT_VAR_PREFIX "ZEVENT_"
#endif /* !ZED_H */

735
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/*
* This file is part of the ZFS Event Daemon (ZED).
*
* Developed at Lawrence Livermore National Laboratory (LLNL-CODE-403049).
* Copyright (C) 2013-2014 Lawrence Livermore National Security, LLC.
* Refer to the ZoL git commit log for authoritative copyright attribution.
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License Version 1.0 (CDDL-1.0).
* You can obtain a copy of the license from the top-level file
* "OPENSOLARIS.LICENSE" or at <http://opensource.org/licenses/CDDL-1.0>.
* You may not use this file except in compliance with the license.
*/
#include <assert.h>
#include <ctype.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <libgen.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/uio.h>
#include <unistd.h>
#include "zed.h"
#include "zed_conf.h"
#include "zed_file.h"
#include "zed_log.h"
#include "zed_strings.h"
/*
* Return a new configuration with default values.
*/
struct zed_conf *
zed_conf_create(void)
{
struct zed_conf *zcp;
zcp = calloc(1, sizeof (*zcp));
if (!zcp)
goto nomem;
zcp->syslog_facility = LOG_DAEMON;
zcp->min_events = ZED_MIN_EVENTS;
zcp->max_events = ZED_MAX_EVENTS;
zcp->pid_fd = -1;
zcp->zedlets = NULL; /* created via zed_conf_scan_dir() */
zcp->state_fd = -1; /* opened via zed_conf_open_state() */
zcp->zfs_hdl = NULL; /* opened via zed_event_init() */
zcp->zevent_fd = -1; /* opened via zed_event_init() */
if (!(zcp->conf_file = strdup(ZED_CONF_FILE)))
goto nomem;
if (!(zcp->pid_file = strdup(ZED_PID_FILE)))
goto nomem;
if (!(zcp->zedlet_dir = strdup(ZED_ZEDLET_DIR)))
goto nomem;
if (!(zcp->state_file = strdup(ZED_STATE_FILE)))
goto nomem;
return (zcp);
nomem:
zed_log_die("Failed to create conf: %s", strerror(errno));
return (NULL);
}
/*
* Destroy the configuration [zcp].
*
* Note: zfs_hdl & zevent_fd are destroyed via zed_event_fini().
*/
void
zed_conf_destroy(struct zed_conf *zcp)
{
if (!zcp)
return;
if (zcp->state_fd >= 0) {
if (close(zcp->state_fd) < 0)
zed_log_msg(LOG_WARNING,
"Failed to close state file \"%s\": %s",
zcp->state_file, strerror(errno));
zcp->state_fd = -1;
}
if (zcp->pid_file) {
if ((unlink(zcp->pid_file) < 0) && (errno != ENOENT))
zed_log_msg(LOG_WARNING,
"Failed to remove PID file \"%s\": %s",
zcp->pid_file, strerror(errno));
}
if (zcp->pid_fd >= 0) {
if (close(zcp->pid_fd) < 0)
zed_log_msg(LOG_WARNING,
"Failed to close PID file \"%s\": %s",
zcp->pid_file, strerror(errno));
zcp->pid_fd = -1;
}
if (zcp->conf_file) {
free(zcp->conf_file);
zcp->conf_file = NULL;
}
if (zcp->pid_file) {
free(zcp->pid_file);
zcp->pid_file = NULL;
}
if (zcp->zedlet_dir) {
free(zcp->zedlet_dir);
zcp->zedlet_dir = NULL;
}
if (zcp->state_file) {
free(zcp->state_file);
zcp->state_file = NULL;
}
if (zcp->zedlets) {
zed_strings_destroy(zcp->zedlets);
zcp->zedlets = NULL;
}
free(zcp);
}
/*
* Display command-line help and exit.
*
* If [got_err] is 0, output to stdout and exit normally;
* otherwise, output to stderr and exit with a failure status.
*/
static void
_zed_conf_display_help(const char *prog, int got_err)
{
FILE *fp = got_err ? stderr : stdout;
int w1 = 4; /* width of leading whitespace */
int w2 = 8; /* width of L-justified option field */
fprintf(fp, "Usage: %s [OPTION]...\n", (prog ? prog : "zed"));
fprintf(fp, "\n");
fprintf(fp, "%*c%*s %s\n", w1, 0x20, -w2, "-h",
"Display help.");
fprintf(fp, "%*c%*s %s\n", w1, 0x20, -w2, "-L",
"Display license information.");
fprintf(fp, "%*c%*s %s\n", w1, 0x20, -w2, "-V",
"Display version information.");
fprintf(fp, "\n");
fprintf(fp, "%*c%*s %s\n", w1, 0x20, -w2, "-v",
"Be verbose.");
fprintf(fp, "%*c%*s %s\n", w1, 0x20, -w2, "-f",
"Force daemon to run.");
fprintf(fp, "%*c%*s %s\n", w1, 0x20, -w2, "-F",
"Run daemon in the foreground.");
fprintf(fp, "%*c%*s %s\n", w1, 0x20, -w2, "-I",
"Idle daemon until kernel module is (re)loaded.");
fprintf(fp, "%*c%*s %s\n", w1, 0x20, -w2, "-M",
"Lock all pages in memory.");
fprintf(fp, "%*c%*s %s\n", w1, 0x20, -w2, "-P",
"$PATH for ZED to use (only used by ZTS).");
fprintf(fp, "%*c%*s %s\n", w1, 0x20, -w2, "-Z",
"Zero state file.");
fprintf(fp, "\n");
#if 0
fprintf(fp, "%*c%*s %s [%s]\n", w1, 0x20, -w2, "-c FILE",
"Read configuration from FILE.", ZED_CONF_FILE);
#endif
fprintf(fp, "%*c%*s %s [%s]\n", w1, 0x20, -w2, "-d DIR",
"Read enabled ZEDLETs from DIR.", ZED_ZEDLET_DIR);
fprintf(fp, "%*c%*s %s [%s]\n", w1, 0x20, -w2, "-p FILE",
"Write daemon's PID to FILE.", ZED_PID_FILE);
fprintf(fp, "%*c%*s %s [%s]\n", w1, 0x20, -w2, "-s FILE",
"Write daemon's state to FILE.", ZED_STATE_FILE);
fprintf(fp, "\n");
exit(got_err ? EXIT_FAILURE : EXIT_SUCCESS);
}
/*
* Display license information to stdout and exit.
*/
static void
_zed_conf_display_license(void)
{
const char **pp;
const char *text[] = {
"The ZFS Event Daemon (ZED) is distributed under the terms of the",
" Common Development and Distribution License (CDDL-1.0)",
" <http://opensource.org/licenses/CDDL-1.0>.",
"",
"Developed at Lawrence Livermore National Laboratory"
" (LLNL-CODE-403049).",
"",
NULL
};
for (pp = text; *pp; pp++)
printf("%s\n", *pp);
exit(EXIT_SUCCESS);
}
/*
* Display version information to stdout and exit.
*/
static void
_zed_conf_display_version(void)
{
printf("%s-%s-%s\n",
ZFS_META_NAME, ZFS_META_VERSION, ZFS_META_RELEASE);
exit(EXIT_SUCCESS);
}
/*
* Copy the [path] string to the [resultp] ptr.
* If [path] is not an absolute path, prefix it with the current working dir.
* If [resultp] is non-null, free its existing string before assignment.
*/
static void
_zed_conf_parse_path(char **resultp, const char *path)
{
char buf[PATH_MAX];
assert(resultp != NULL);
assert(path != NULL);
if (*resultp)
free(*resultp);
if (path[0] == '/') {
*resultp = strdup(path);
} else if (!getcwd(buf, sizeof (buf))) {
zed_log_die("Failed to get current working dir: %s",
strerror(errno));
} else if (strlcat(buf, "/", sizeof (buf)) >= sizeof (buf)) {
zed_log_die("Failed to copy path: %s", strerror(ENAMETOOLONG));
} else if (strlcat(buf, path, sizeof (buf)) >= sizeof (buf)) {
zed_log_die("Failed to copy path: %s", strerror(ENAMETOOLONG));
} else {
*resultp = strdup(buf);
}
if (!*resultp)
zed_log_die("Failed to copy path: %s", strerror(ENOMEM));
}
/*
* Parse the command-line options into the configuration [zcp].
*/
void
zed_conf_parse_opts(struct zed_conf *zcp, int argc, char **argv)
{
const char * const opts = ":hLVc:d:p:P:s:vfFMZI";
int opt;
if (!zcp || !argv || !argv[0])
zed_log_die("Failed to parse options: Internal error");
opterr = 0; /* suppress default getopt err msgs */
while ((opt = getopt(argc, argv, opts)) != -1) {
switch (opt) {
case 'h':
_zed_conf_display_help(argv[0], EXIT_SUCCESS);
break;
case 'L':
_zed_conf_display_license();
break;
case 'V':
_zed_conf_display_version();
break;
case 'c':
_zed_conf_parse_path(&zcp->conf_file, optarg);
break;
case 'd':
_zed_conf_parse_path(&zcp->zedlet_dir, optarg);
break;
case 'I':
zcp->do_idle = 1;
break;
case 'p':
_zed_conf_parse_path(&zcp->pid_file, optarg);
break;
case 'P':
_zed_conf_parse_path(&zcp->path, optarg);
break;
case 's':
_zed_conf_parse_path(&zcp->state_file, optarg);
break;
case 'v':
zcp->do_verbose = 1;
break;
case 'f':
zcp->do_force = 1;
break;
case 'F':
zcp->do_foreground = 1;
break;
case 'M':
zcp->do_memlock = 1;
break;
case 'Z':
zcp->do_zero = 1;
break;
case '?':
default:
if (optopt == '?')
_zed_conf_display_help(argv[0], EXIT_SUCCESS);
fprintf(stderr, "%s: %s '-%c'\n\n", argv[0],
"Invalid option", optopt);
_zed_conf_display_help(argv[0], EXIT_FAILURE);
break;
}
}
}
/*
* Parse the configuration file into the configuration [zcp].
*
* FIXME: Not yet implemented.
*/
void
zed_conf_parse_file(struct zed_conf *zcp)
{
if (!zcp)
zed_log_die("Failed to parse config: %s", strerror(EINVAL));
}
/*
* Scan the [zcp] zedlet_dir for files to exec based on the event class.
* Files must be executable by user, but not writable by group or other.
* Dotfiles are ignored.
*
* Return 0 on success with an updated set of zedlets,
* or -1 on error with errno set.
*
* FIXME: Check if zedlet_dir and all parent dirs are secure.
*/
int
zed_conf_scan_dir(struct zed_conf *zcp)
{
zed_strings_t *zedlets;
DIR *dirp;
struct dirent *direntp;
char pathname[PATH_MAX];
struct stat st;
int n;
if (!zcp) {
errno = EINVAL;
zed_log_msg(LOG_ERR, "Failed to scan zedlet dir: %s",
strerror(errno));
return (-1);
}
zedlets = zed_strings_create();
if (!zedlets) {
errno = ENOMEM;
zed_log_msg(LOG_WARNING, "Failed to scan dir \"%s\": %s",
zcp->zedlet_dir, strerror(errno));
return (-1);
}
dirp = opendir(zcp->zedlet_dir);
if (!dirp) {
int errno_bak = errno;
zed_log_msg(LOG_WARNING, "Failed to open dir \"%s\": %s",
zcp->zedlet_dir, strerror(errno));
zed_strings_destroy(zedlets);
errno = errno_bak;
return (-1);
}
while ((direntp = readdir(dirp))) {
if (direntp->d_name[0] == '.')
continue;
n = snprintf(pathname, sizeof (pathname),
"%s/%s", zcp->zedlet_dir, direntp->d_name);
if ((n < 0) || (n >= sizeof (pathname))) {
zed_log_msg(LOG_WARNING, "Failed to stat \"%s\": %s",
direntp->d_name, strerror(ENAMETOOLONG));
continue;
}
if (stat(pathname, &st) < 0) {
zed_log_msg(LOG_WARNING, "Failed to stat \"%s\": %s",
pathname, strerror(errno));
continue;
}
if (!S_ISREG(st.st_mode)) {
zed_log_msg(LOG_INFO,
"Ignoring \"%s\": not a regular file",
direntp->d_name);
continue;
}
if ((st.st_uid != 0) && !zcp->do_force) {
zed_log_msg(LOG_NOTICE,
"Ignoring \"%s\": not owned by root",
direntp->d_name);
continue;
}
if (!(st.st_mode & S_IXUSR)) {
zed_log_msg(LOG_INFO,
"Ignoring \"%s\": not executable by user",
direntp->d_name);
continue;
}
if ((st.st_mode & S_IWGRP) && !zcp->do_force) {
zed_log_msg(LOG_NOTICE,
"Ignoring \"%s\": writable by group",
direntp->d_name);
continue;
}
if ((st.st_mode & S_IWOTH) && !zcp->do_force) {
zed_log_msg(LOG_NOTICE,
"Ignoring \"%s\": writable by other",
direntp->d_name);
continue;
}
if (zed_strings_add(zedlets, NULL, direntp->d_name) < 0) {
zed_log_msg(LOG_WARNING,
"Failed to register \"%s\": %s",
direntp->d_name, strerror(errno));
continue;
}
if (zcp->do_verbose)
zed_log_msg(LOG_INFO,
"Registered zedlet \"%s\"", direntp->d_name);
}
if (closedir(dirp) < 0) {
int errno_bak = errno;
zed_log_msg(LOG_WARNING, "Failed to close dir \"%s\": %s",
zcp->zedlet_dir, strerror(errno));
zed_strings_destroy(zedlets);
errno = errno_bak;
return (-1);
}
if (zcp->zedlets)
zed_strings_destroy(zcp->zedlets);
zcp->zedlets = zedlets;
return (0);
}
/*
* Write the PID file specified in [zcp].
* Return 0 on success, -1 on error.
*
* This must be called after fork()ing to become a daemon (so the correct PID
* is recorded), but before daemonization is complete and the parent process
* exits (for synchronization with systemd).
*/
int
zed_conf_write_pid(struct zed_conf *zcp)
{
const mode_t dirmode = S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH;
const mode_t filemode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
char buf[PATH_MAX];
int n;
char *p;
mode_t mask;
int rv;
if (!zcp || !zcp->pid_file) {
errno = EINVAL;
zed_log_msg(LOG_ERR, "Failed to create PID file: %s",
strerror(errno));
return (-1);
}
assert(zcp->pid_fd == -1);
/*
* Create PID file directory if needed.
*/
n = strlcpy(buf, zcp->pid_file, sizeof (buf));
if (n >= sizeof (buf)) {
errno = ENAMETOOLONG;
zed_log_msg(LOG_ERR, "Failed to create PID file: %s",
strerror(errno));
goto err;
}
p = strrchr(buf, '/');
if (p)
*p = '\0';
if ((mkdirp(buf, dirmode) < 0) && (errno != EEXIST)) {
zed_log_msg(LOG_ERR, "Failed to create directory \"%s\": %s",
buf, strerror(errno));
goto err;
}
/*
* Obtain PID file lock.
*/
mask = umask(0);
umask(mask | 022);
zcp->pid_fd = open(zcp->pid_file, (O_RDWR | O_CREAT), filemode);
umask(mask);
if (zcp->pid_fd < 0) {
zed_log_msg(LOG_ERR, "Failed to open PID file \"%s\": %s",
zcp->pid_file, strerror(errno));
goto err;
}
rv = zed_file_lock(zcp->pid_fd);
if (rv < 0) {
zed_log_msg(LOG_ERR, "Failed to lock PID file \"%s\": %s",
zcp->pid_file, strerror(errno));
goto err;
} else if (rv > 0) {
pid_t pid = zed_file_is_locked(zcp->pid_fd);
if (pid < 0) {
zed_log_msg(LOG_ERR,
"Failed to test lock on PID file \"%s\"",
zcp->pid_file);
} else if (pid > 0) {
zed_log_msg(LOG_ERR,
"Found PID %d bound to PID file \"%s\"",
pid, zcp->pid_file);
} else {
zed_log_msg(LOG_ERR,
"Inconsistent lock state on PID file \"%s\"",
zcp->pid_file);
}
goto err;
}
/*
* Write PID file.
*/
n = snprintf(buf, sizeof (buf), "%d\n", (int)getpid());
if ((n < 0) || (n >= sizeof (buf))) {
errno = ERANGE;
zed_log_msg(LOG_ERR, "Failed to write PID file \"%s\": %s",
zcp->pid_file, strerror(errno));
} else if (zed_file_write_n(zcp->pid_fd, buf, n) != n) {
zed_log_msg(LOG_ERR, "Failed to write PID file \"%s\": %s",
zcp->pid_file, strerror(errno));
} else if (fdatasync(zcp->pid_fd) < 0) {
zed_log_msg(LOG_ERR, "Failed to sync PID file \"%s\": %s",
zcp->pid_file, strerror(errno));
} else {
return (0);
}
err:
if (zcp->pid_fd >= 0) {
(void) close(zcp->pid_fd);
zcp->pid_fd = -1;
}
return (-1);
}
/*
* Open and lock the [zcp] state_file.
* Return 0 on success, -1 on error.
*
* FIXME: Move state information into kernel.
*/
int
zed_conf_open_state(struct zed_conf *zcp)
{
char dirbuf[PATH_MAX];
mode_t dirmode = S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH;
int n;
char *p;
int rv;
if (!zcp || !zcp->state_file) {
errno = EINVAL;
zed_log_msg(LOG_ERR, "Failed to open state file: %s",
strerror(errno));
return (-1);
}
n = strlcpy(dirbuf, zcp->state_file, sizeof (dirbuf));
if (n >= sizeof (dirbuf)) {
errno = ENAMETOOLONG;
zed_log_msg(LOG_WARNING, "Failed to open state file: %s",
strerror(errno));
return (-1);
}
p = strrchr(dirbuf, '/');
if (p)
*p = '\0';
if ((mkdirp(dirbuf, dirmode) < 0) && (errno != EEXIST)) {
zed_log_msg(LOG_WARNING,
"Failed to create directory \"%s\": %s",
dirbuf, strerror(errno));
return (-1);
}
if (zcp->state_fd >= 0) {
if (close(zcp->state_fd) < 0) {
zed_log_msg(LOG_WARNING,
"Failed to close state file \"%s\": %s",
zcp->state_file, strerror(errno));
return (-1);
}
}
if (zcp->do_zero)
(void) unlink(zcp->state_file);
zcp->state_fd = open(zcp->state_file,
(O_RDWR | O_CREAT), (S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH));
if (zcp->state_fd < 0) {
zed_log_msg(LOG_WARNING, "Failed to open state file \"%s\": %s",
zcp->state_file, strerror(errno));
return (-1);
}
rv = zed_file_lock(zcp->state_fd);
if (rv < 0) {
zed_log_msg(LOG_WARNING, "Failed to lock state file \"%s\": %s",
zcp->state_file, strerror(errno));
return (-1);
}
if (rv > 0) {
pid_t pid = zed_file_is_locked(zcp->state_fd);
if (pid < 0) {
zed_log_msg(LOG_WARNING,
"Failed to test lock on state file \"%s\"",
zcp->state_file);
} else if (pid > 0) {
zed_log_msg(LOG_WARNING,
"Found PID %d bound to state file \"%s\"",
pid, zcp->state_file);
} else {
zed_log_msg(LOG_WARNING,
"Inconsistent lock state on state file \"%s\"",
zcp->state_file);
}
return (-1);
}
return (0);
}
/*
* Read the opened [zcp] state_file to obtain the eid & etime of the last event
* processed. Write the state from the last event to the [eidp] & [etime] args
* passed by reference. Note that etime[] is an array of size 2.
* Return 0 on success, -1 on error.
*/
int
zed_conf_read_state(struct zed_conf *zcp, uint64_t *eidp, int64_t etime[])
{
ssize_t len;
struct iovec iov[3];
ssize_t n;
if (!zcp || !eidp || !etime) {
errno = EINVAL;
zed_log_msg(LOG_ERR,
"Failed to read state file: %s", strerror(errno));
return (-1);
}
if (lseek(zcp->state_fd, 0, SEEK_SET) == (off_t)-1) {
zed_log_msg(LOG_WARNING,
"Failed to reposition state file offset: %s",
strerror(errno));
return (-1);
}
len = 0;
iov[0].iov_base = eidp;
len += iov[0].iov_len = sizeof (*eidp);
iov[1].iov_base = &etime[0];
len += iov[1].iov_len = sizeof (etime[0]);
iov[2].iov_base = &etime[1];
len += iov[2].iov_len = sizeof (etime[1]);
n = readv(zcp->state_fd, iov, 3);
if (n == 0) {
*eidp = 0;
} else if (n < 0) {
zed_log_msg(LOG_WARNING,
"Failed to read state file \"%s\": %s",
zcp->state_file, strerror(errno));
return (-1);
} else if (n != len) {
errno = EIO;
zed_log_msg(LOG_WARNING,
"Failed to read state file \"%s\": Read %d of %d bytes",
zcp->state_file, n, len);
return (-1);
}
return (0);
}
/*
* Write the [eid] & [etime] of the last processed event to the opened
* [zcp] state_file. Note that etime[] is an array of size 2.
* Return 0 on success, -1 on error.
*/
int
zed_conf_write_state(struct zed_conf *zcp, uint64_t eid, int64_t etime[])
{
ssize_t len;
struct iovec iov[3];
ssize_t n;
if (!zcp) {
errno = EINVAL;
zed_log_msg(LOG_ERR,
"Failed to write state file: %s", strerror(errno));
return (-1);
}
if (lseek(zcp->state_fd, 0, SEEK_SET) == (off_t)-1) {
zed_log_msg(LOG_WARNING,
"Failed to reposition state file offset: %s",
strerror(errno));
return (-1);
}
len = 0;
iov[0].iov_base = &eid;
len += iov[0].iov_len = sizeof (eid);
iov[1].iov_base = &etime[0];
len += iov[1].iov_len = sizeof (etime[0]);
iov[2].iov_base = &etime[1];
len += iov[2].iov_len = sizeof (etime[1]);
n = writev(zcp->state_fd, iov, 3);
if (n < 0) {
zed_log_msg(LOG_WARNING,
"Failed to write state file \"%s\": %s",
zcp->state_file, strerror(errno));
return (-1);
}
if (n != len) {
errno = EIO;
zed_log_msg(LOG_WARNING,
"Failed to write state file \"%s\": Wrote %d of %d bytes",
zcp->state_file, n, len);
return (-1);
}
if (fdatasync(zcp->state_fd) < 0) {
zed_log_msg(LOG_WARNING,
"Failed to sync state file \"%s\": %s",
zcp->state_file, strerror(errno));
return (-1);
}
return (0);
}

62
zfs-2.0.0-rc6/cmd/zed/zed_conf.h Normal file
View file

@ -0,0 +1,62 @@
/*
* This file is part of the ZFS Event Daemon (ZED).
*
* Developed at Lawrence Livermore National Laboratory (LLNL-CODE-403049).
* Copyright (C) 2013-2014 Lawrence Livermore National Security, LLC.
* Refer to the ZoL git commit log for authoritative copyright attribution.
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License Version 1.0 (CDDL-1.0).
* You can obtain a copy of the license from the top-level file
* "OPENSOLARIS.LICENSE" or at <http://opensource.org/licenses/CDDL-1.0>.
* You may not use this file except in compliance with the license.
*/
#ifndef ZED_CONF_H
#define ZED_CONF_H
#include <libzfs.h>
#include <stdint.h>
#include "zed_strings.h"
struct zed_conf {
unsigned do_force:1; /* true if force enabled */
unsigned do_foreground:1; /* true if run in foreground */
unsigned do_memlock:1; /* true if locking memory */
unsigned do_verbose:1; /* true if verbosity enabled */
unsigned do_zero:1; /* true if zeroing state */
unsigned do_idle:1; /* true if idle enabled */
int syslog_facility; /* syslog facility value */
int min_events; /* RESERVED FOR FUTURE USE */
int max_events; /* RESERVED FOR FUTURE USE */
char *conf_file; /* abs path to config file */
char *pid_file; /* abs path to pid file */
int pid_fd; /* fd to pid file for lock */
char *zedlet_dir; /* abs path to zedlet dir */
zed_strings_t *zedlets; /* names of enabled zedlets */
char *state_file; /* abs path to state file */
int state_fd; /* fd to state file */
libzfs_handle_t *zfs_hdl; /* handle to libzfs */
int zevent_fd; /* fd for access to zevents */
char *path; /* custom $PATH for zedlets to use */
};
struct zed_conf *zed_conf_create(void);
void zed_conf_destroy(struct zed_conf *zcp);
void zed_conf_parse_opts(struct zed_conf *zcp, int argc, char **argv);
void zed_conf_parse_file(struct zed_conf *zcp);
int zed_conf_scan_dir(struct zed_conf *zcp);
int zed_conf_write_pid(struct zed_conf *zcp);
int zed_conf_open_state(struct zed_conf *zcp);
int zed_conf_read_state(struct zed_conf *zcp, uint64_t *eidp, int64_t etime[]);
int zed_conf_write_state(struct zed_conf *zcp, uint64_t eid, int64_t etime[]);
#endif /* !ZED_CONF_H */

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