341 lines
8.3 KiB
Text
341 lines
8.3 KiB
Text
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#!@SHELL@
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#
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# zfs-import This script will import ZFS pools
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#
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# chkconfig: 2345 01 99
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# description: This script will perform a verbatim import of ZFS pools
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# during system boot.
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# probe: true
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#
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### BEGIN INIT INFO
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# Provides: zfs-import
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# Required-Start: mtab
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# Required-Stop: $local_fs mtab
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# Default-Start: S
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# Default-Stop: 0 1 6
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# X-Start-Before: checkfs
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# X-Stop-After: zfs-mount
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# Short-Description: Import ZFS pools
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# Description: Run the `zpool import` command.
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### END INIT INFO
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#
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# NOTE: Not having '$local_fs' on Required-Start but only on Required-Stop
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# is on purpose. If we have '$local_fs' in both (and X-Start-Before=checkfs)
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# we get conflicts - import needs to be started extremely early,
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# but not stopped too late.
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#
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# Released under the 2-clause BSD license.
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#
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# The original script that acted as a template for this script came from
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# the Debian GNU/Linux kFreeBSD ZFS packages (which did not include a
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# licensing stansa) in the commit dated Mar 24, 2011:
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# https://github.com/zfsonlinux/pkg-zfs/commit/80a3ae582b59c0250d7912ba794dca9e669e605a
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# Source the common init script
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. @sysconfdir@/zfs/zfs-functions
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# ----------------------------------------------------
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do_depend()
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{
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before swap
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after sysfs udev
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keyword -lxc -openvz -prefix -vserver
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}
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# Use the zpool cache file to import pools
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do_verbatim_import()
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{
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if [ -f "$ZPOOL_CACHE" ]
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then
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zfs_action "Importing ZFS pool(s)" \
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"$ZPOOL" import -c "$ZPOOL_CACHE" -N -a
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fi
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}
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# Support function to get a list of all pools, separated with ';'
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find_pools()
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{
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local CMD="$*"
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local pools
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pools=$($CMD 2> /dev/null | \
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grep -E "pool:|^[a-zA-Z0-9]" | \
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sed 's@.*: @@' | \
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sort | \
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while read pool; do \
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echo -n "$pool;"
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done)
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echo "${pools%%;}" # Return without the last ';'.
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}
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# Find and import all visible pools, even exported ones
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do_import_all_visible()
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{
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local already_imported available_pools pool npools
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local exception dir ZPOOL_IMPORT_PATH RET=0 r=1
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# In case not shutdown cleanly.
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[ -n "$init" ] && rm -f /etc/dfs/sharetab
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# Just simplify code later on.
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if [ -n "$USE_DISK_BY_ID" -a "$USE_DISK_BY_ID" != 'yes' ]
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then
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# It's something, but not 'yes' so it's no good to us.
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unset USE_DISK_BY_ID
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fi
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# Find list of already imported pools.
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already_imported=$(find_pools "$ZPOOL" list -H -oname)
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available_pools=$(find_pools "$ZPOOL" import)
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# Just in case - seen it happen (that a pool isn't visible/found
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# with a simple "zpool import" but only when using the "-d"
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# option or setting ZPOOL_IMPORT_PATH).
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if [ -d "/dev/disk/by-id" ]
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then
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npools=$(find_pools "$ZPOOL" import -d /dev/disk/by-id)
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if [ -n "$npools" ]
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then
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# Because we have found extra pool(s) here, which wasn't
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# found 'normally', we need to force USE_DISK_BY_ID to
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# make sure we're able to actually import it/them later.
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USE_DISK_BY_ID='yes'
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if [ -n "$available_pools" ]
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then
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# Filter out duplicates (pools found with the simpl
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# "zpool import" but which is also found with the
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# "zpool import -d ...").
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npools=$(echo "$npools" | sed "s,$available_pools,,")
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# Add the list to the existing list of
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# available pools
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available_pools="$available_pools;$npools"
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else
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available_pools="$npools"
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fi
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fi
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fi
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# Filter out any exceptions...
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if [ -n "$ZFS_POOL_EXCEPTIONS" ]
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then
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local found=""
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local apools=""
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OLD_IFS="$IFS" ; IFS=";"
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for pool in $available_pools
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do
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for exception in $ZFS_POOL_EXCEPTIONS
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do
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[ "$pool" = "$exception" ] && continue 2
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found="$pool"
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done
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if [ -n "$found" ]
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then
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if [ -n "$apools" ]
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then
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apools="$apools;$pool"
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else
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apools="$pool"
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fi
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fi
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done
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IFS="$OLD_IFS"
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available_pools="$apools"
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fi
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# For backwards compatibility, make sure that ZPOOL_IMPORT_PATH is set
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# to something we can use later with the real import(s). We want to
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# make sure we find all by* dirs, BUT by-vdev should be first (if it
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# exists).
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if [ -n "$USE_DISK_BY_ID" -a -z "$ZPOOL_IMPORT_PATH" ]
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then
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local dirs
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dirs="$(for dir in $(echo /dev/disk/by-*)
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do
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# Ignore by-vdev here - we want it first!
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echo "$dir" | grep -q /by-vdev && continue
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[ ! -d "$dir" ] && continue
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echo -n "$dir:"
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done | sed 's,:$,,g')"
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if [ -d "/dev/disk/by-vdev" ]
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then
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# Add by-vdev at the beginning.
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ZPOOL_IMPORT_PATH="/dev/disk/by-vdev:"
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fi
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# Help with getting LUKS partitions etc imported.
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if [ -d "/dev/mapper" ]; then
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if [ -n "$ZPOOL_IMPORT_PATH" ]; then
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ZPOOL_IMPORT_PATH="$ZPOOL_IMPORT_PATH:/dev/mapper:"
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else
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ZPOOL_IMPORT_PATH="/dev/mapper:"
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fi
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fi
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# ... and /dev at the very end, just for good measure.
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ZPOOL_IMPORT_PATH="$ZPOOL_IMPORT_PATH$dirs:/dev"
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fi
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# Needs to be exported for "zpool" to catch it.
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[ -n "$ZPOOL_IMPORT_PATH" ] && export ZPOOL_IMPORT_PATH
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# Mount all available pools (except those set in ZFS_POOL_EXCEPTIONS.
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#
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# If not interactive (run from init - variable init='/sbin/init')
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# we get ONE line for all pools being imported, with just a dot
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# as status for each pool.
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# Example: Importing ZFS pool(s)... [OK]
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#
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# If it IS interactive (started from the shell manually), then we
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# get one line per pool importing.
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# Example: Importing ZFS pool pool1 [OK]
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# Importing ZFS pool pool2 [OK]
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# [etc]
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[ -n "$init" ] && zfs_log_begin_msg "Importing ZFS pool(s)"
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OLD_IFS="$IFS" ; IFS=";"
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for pool in $available_pools
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do
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[ -z "$pool" ] && continue
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# We have pools that haven't been imported - import them
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if [ -n "$init" ]
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then
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# Not interactive - a dot for each pool.
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# Except on Gentoo where this doesn't work.
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zfs_log_progress_msg "."
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else
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# Interactive - one 'Importing ...' line per pool
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zfs_log_begin_msg "Importing ZFS pool $pool"
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fi
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# Import by using ZPOOL_IMPORT_PATH (either set above or in
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# the config file) _or_ with the 'built in' default search
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# paths. This is the preferred way.
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"$ZPOOL" import -N ${ZPOOL_IMPORT_OPTS} "$pool" 2> /dev/null
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r="$?" ; RET=$((RET + r))
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if [ "$r" -eq 0 ]
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then
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# Output success and process the next pool
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[ -z "$init" ] && zfs_log_end_msg 0
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continue
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fi
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# We don't want a fail msg here, we're going to try import
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# using the cache file soon and that might succeed.
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[ ! -f "$ZPOOL_CACHE" ] && zfs_log_end_msg "$RET"
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if [ "$r" -gt 0 -a -f "$ZPOOL_CACHE" ]
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then
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# Failed to import without a cache file. Try WITH...
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if [ -z "$init" ] && check_boolean "$VERBOSE_MOUNT"
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then
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# Interactive + Verbose = more information
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zfs_log_progress_msg " using cache file"
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fi
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"$ZPOOL" import -c "$ZPOOL_CACHE" -N ${ZPOOL_IMPORT_OPTS} \
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"$pool" 2> /dev/null
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r="$?" ; RET=$((RET + r))
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if [ "$r" -eq 0 ]
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then
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[ -z "$init" ] && zfs_log_end_msg 0
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continue 3 # Next pool
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fi
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zfs_log_end_msg "$RET"
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fi
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done
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[ -n "$init" ] && zfs_log_end_msg "$RET"
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IFS="$OLD_IFS"
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[ -n "$already_imported" -a -z "$available_pools" ] && return 0
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return "$RET"
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}
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do_import()
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{
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if check_boolean "$ZPOOL_IMPORT_ALL_VISIBLE"
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then
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do_import_all_visible
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else
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# This is the default option
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do_verbatim_import
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fi
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}
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# Output the status and list of pools
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do_status()
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{
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check_module_loaded "zfs" || exit 0
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"$ZPOOL" status && echo "" && "$ZPOOL" list
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}
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do_start()
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{
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if check_boolean "$VERBOSE_MOUNT"
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then
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zfs_log_begin_msg "Checking if ZFS userspace tools present"
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fi
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if checksystem
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then
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check_boolean "$VERBOSE_MOUNT" && zfs_log_end_msg 0
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check_boolean "$VERBOSE_MOUNT" && \
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zfs_log_begin_msg "Loading kernel ZFS infrastructure"
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if ! load_module "zfs"
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then
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check_boolean "$VERBOSE_MOUNT" && zfs_log_end_msg 1
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return 5
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fi
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check_boolean "$VERBOSE_MOUNT" && zfs_log_end_msg 0
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do_import && udev_trigger # just to make sure we get zvols.
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return 0
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else
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return 1
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fi
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}
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# ----------------------------------------------------
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if [ ! -e /sbin/openrc-run ]
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then
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case "$1" in
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start)
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do_start
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;;
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stop)
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# no-op
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;;
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status)
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do_status
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;;
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force-reload|condrestart|reload|restart)
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# no-op
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;;
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*)
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[ -n "$1" ] && echo "Error: Unknown command $1."
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echo "Usage: $0 {start|status}"
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exit 3
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;;
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esac
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exit $?
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else
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# Create wrapper functions since Gentoo don't use the case part.
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depend() { do_depend; }
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start() { do_start; }
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status() { do_status; }
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fi
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