198 lines
6.6 KiB
Groff
198 lines
6.6 KiB
Groff
'\" t
|
|
.\"
|
|
.\" 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 2013 Darik Horn <dajhorn@vanadac.com>. All rights reserved.
|
|
.\"
|
|
.TH ZINJECT 8 "Aug 24, 2020" OpenZFS
|
|
|
|
.SH NAME
|
|
zinject \- ZFS Fault Injector
|
|
.SH DESCRIPTION
|
|
.BR zinject
|
|
creates artificial problems in a ZFS pool by simulating data corruption or device failures. This program is dangerous.
|
|
.SH SYNOPSIS
|
|
.TP
|
|
.B "zinject"
|
|
List injection records.
|
|
.TP
|
|
.B "zinject \-b \fIobjset:object:level:blkd\fB [\-f \fIfrequency\fB] [\-amu] \fIpool\fB"
|
|
Force an error into the pool at a bookmark.
|
|
.TP
|
|
.B "zinject \-c <\fIid\fB | all>
|
|
Cancel injection records.
|
|
.TP
|
|
.B "zinject \-d \fIvdev\fB \-A <degrade|fault> \fIpool\fB
|
|
Force a vdev into the DEGRADED or FAULTED state.
|
|
.TP
|
|
.B "zinject -d \fIvdev\fB -D latency:lanes \fIpool\fB
|
|
|
|
Add an artificial delay to IO requests on a particular
|
|
device, such that the requests take a minimum of 'latency'
|
|
milliseconds to complete. Each delay has an associated
|
|
number of 'lanes' which defines the number of concurrent
|
|
IO requests that can be processed.
|
|
|
|
For example, with a single lane delay of 10 ms (-D 10:1),
|
|
the device will only be able to service a single IO request
|
|
at a time with each request taking 10 ms to complete. So,
|
|
if only a single request is submitted every 10 ms, the
|
|
average latency will be 10 ms; but if more than one request
|
|
is submitted every 10 ms, the average latency will be more
|
|
than 10 ms.
|
|
|
|
Similarly, if a delay of 10 ms is specified to have two
|
|
lanes (-D 10:2), then the device will be able to service
|
|
two requests at a time, each with a minimum latency of
|
|
10 ms. So, if two requests are submitted every 10 ms, then
|
|
the average latency will be 10 ms; but if more than two
|
|
requests are submitted every 10 ms, the average latency
|
|
will be more than 10 ms.
|
|
|
|
Also note, these delays are additive. So two invocations
|
|
of '-D 10:1', is roughly equivalent to a single invocation
|
|
of '-D 10:2'. This also means, one can specify multiple
|
|
lanes with differing target latencies. For example, an
|
|
invocation of '-D 10:1' followed by '-D 25:2' will
|
|
create 3 lanes on the device; one lane with a latency
|
|
of 10 ms and two lanes with a 25 ms latency.
|
|
|
|
.TP
|
|
.B "zinject \-d \fIvdev\fB [\-e \fIdevice_error\fB] [\-L \fIlabel_error\fB] [\-T \fIfailure\fB] [\-f \fIfrequency\fB] [\-F] \fIpool\fB"
|
|
Force a vdev error.
|
|
.TP
|
|
.B "zinject \-I [\-s \fIseconds\fB | \-g \fItxgs\fB] \fIpool\fB"
|
|
Simulate a hardware failure that fails to honor a cache flush.
|
|
.TP
|
|
.B "zinject \-p \fIfunction\fB \fIpool\fB
|
|
Panic inside the specified function.
|
|
.TP
|
|
.B "zinject \-t data [\-C \fIdvas\fB] [\-e \fIdevice_error\fB] [\-f \fIfrequency\fB] [\-l \fIlevel\fB] [\-r \fIrange\fB] [\-amq] \fIpath\fB"
|
|
Force an error into the contents of a file.
|
|
.TP
|
|
.B "zinject \-t dnode [\-C \fIdvas\fB] [\-e \fIdevice_error\fB] [\-f \fIfrequency\fB] [\-l \fIlevel\fB] [\-amq] \fIpath\fB"
|
|
Force an error into the metadnode for a file or directory.
|
|
.TP
|
|
.B "zinject \-t \fImos_type\fB [\-C \fIdvas\fB] [\-e \fIdevice_error\fB] [\-f \fIfrequency\fB] [\-l \fIlevel\fB] [\-r \fIrange\fB] [\-amqu] \fIpool\fB"
|
|
Force an error into the MOS of a pool.
|
|
.SH OPTIONS
|
|
.TP
|
|
.BI "\-a"
|
|
Flush the ARC before injection.
|
|
.TP
|
|
.BI "\-b" " objset:object:level:start:end"
|
|
Force an error into the pool at this bookmark tuple. Each number is
|
|
in hexadecimal, and only one block can be specified.
|
|
.TP
|
|
.BI "\-C" " dvas"
|
|
Inject the given error only into specific DVAs. The mask should be
|
|
specified as a list of 0-indexed DVAs separated by commas (ex. '0,2'). This
|
|
option is not applicable to logical data errors such as
|
|
.BR "decompress"
|
|
and
|
|
.BR "decrypt" .
|
|
.TP
|
|
.BI "\-d" " vdev"
|
|
A vdev specified by path or GUID.
|
|
.TP
|
|
.BI "\-e" " device_error"
|
|
Specify
|
|
.BR "checksum" " for an ECKSUM error,"
|
|
.BR "decompress" " for a data decompression error,"
|
|
.BR "decrypt" " for a data decryption error,"
|
|
.BR "corrupt" " to flip a bit in the data after a read,"
|
|
.BR "dtl" " for an ECHILD error,"
|
|
.BR "io" " for an EIO error where reopening the device will succeed, or"
|
|
.BR "nxio" " for an ENXIO error where reopening the device will fail."
|
|
For EIO and ENXIO, the "failed" reads or writes still occur. The probe simply
|
|
sets the error value reported by the I/O pipeline so it appears the read or
|
|
write failed. Decryption errors only currently work with file data.
|
|
.TP
|
|
.BI "\-f" " frequency"
|
|
Only inject errors a fraction of the time. Expressed as a real number
|
|
percentage between 0.0001 and 100.
|
|
.TP
|
|
.BI "\-F"
|
|
Fail faster. Do fewer checks.
|
|
.TP
|
|
.BI "\-g" " txgs"
|
|
Run for this many transaction groups before reporting failure.
|
|
.TP
|
|
.BI "\-h"
|
|
Print the usage message.
|
|
.TP
|
|
.BI "\-l" " level"
|
|
Inject an error at a particular block level. The default is 0.
|
|
.TP
|
|
.BI "\-L" " label_error"
|
|
Set the label error region to one of
|
|
.BR " nvlist" ","
|
|
.BR " pad1" ","
|
|
.BR " pad2" ", or"
|
|
.BR " uber" "."
|
|
.TP
|
|
.BI "\-m"
|
|
Automatically remount the underlying filesystem.
|
|
.TP
|
|
.BI "\-q"
|
|
Quiet mode. Only print the handler number added.
|
|
.TP
|
|
.BI "\-r" " range"
|
|
Inject an error over a particular logical range of an object, which
|
|
will be translated to the appropriate blkid range according to the
|
|
object's properties.
|
|
.TP
|
|
.BI "\-s" " seconds"
|
|
Run for this many seconds before reporting failure.
|
|
.TP
|
|
.BI "\-T" " failure"
|
|
Set the failure type to one of
|
|
.BR " all" ","
|
|
.BR " claim" ","
|
|
.BR " free" ","
|
|
.BR " read" ", or"
|
|
.BR " write" "."
|
|
.TP
|
|
.BI "\-t" " mos_type"
|
|
Set this to
|
|
.BR "mos " "for any data in the MOS,"
|
|
.BR "mosdir " "for an object directory,"
|
|
.BR "config " "for the pool configuration,"
|
|
.BR "bpobj " "for the block pointer list,"
|
|
.BR "spacemap " "for the space map,"
|
|
.BR "metaslab " "for the metaslab, or"
|
|
.BR "errlog " "for the persistent error log."
|
|
.TP
|
|
.BI "\-u"
|
|
Unload the pool after injection.
|
|
|
|
.SH "ENVIRONMENT VARIABLES"
|
|
.TP
|
|
.B "ZINJECT_DEBUG"
|
|
Run \fBzinject\fR in debug mode.
|
|
|
|
.SH "AUTHORS"
|
|
This man page was written by Darik Horn <dajhorn@vanadac.com>
|
|
excerpting the \fBzinject\fR usage message and source code.
|
|
|
|
.SH "SEE ALSO"
|
|
.BR zpool (8),
|
|
.BR zfs (8)
|