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8720e9e748
This patch adds a command (-c) option to zpool status and zpool iostat. The
-c option allows you to run an arbitrary command on each vdev and display
the first line of output in zpool status/iostat. The environment vars
VDEV_PATH and VDEV_UPATH are set to the vdev's path and "underlying path"
before running the command. For device mapper, multipath, or partitioned
vdevs, VDEV_UPATH is the actual underlying /dev/sd* disk. This can be useful
if the command you're running requires a /dev/sd* device.
The patch also uses /sys/block/<dev>/slaves/ to lookup the underlying device
instead of using libdevmapper. This not only removes the libdevmapper
requirement at build time, but also allows you to resolve device mapper
devices without being root. This means that UDEV_UPATH get set correctly
when running zpool status/iostat as an unprivileged user.
Example:
$ zpool status -c 'echo I am $VDEV_PATH, $VDEV_UPATH'
NAME STATE READ WRITE CKSUM
mypool ONLINE 0 0 0
mirror-0 ONLINE 0 0 0
mpatha ONLINE 0 0 0 I am /dev/mapper/mpatha, /dev/sdc
sdb ONLINE 0 0 0 I am /dev/sdb1, /dev/sdb
Reviewed-by: Giuseppe Di Natale <dinatale2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tony Hutter <hutter2@llnl.gov>
Closes #5368
81 lines
2.4 KiB
Bash
Executable File
81 lines
2.4 KiB
Bash
Executable File
#!/bin/bash
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#
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# Turn off/on the VDEV's enclosure fault LEDs when the pool's state changes.
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#
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# Turn LED on if the VDEV becomes faulted or degraded, and turn it back off
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# when it's online again. It will also turn on the LED (or keep it on) if
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# the drive becomes unavailable, unless the drive was in was a previously
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# online state (online->unavail is a normal state transition during an
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# autoreplace).
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#
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# This script requires that your enclosure be supported by the
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# Linux SCSI enclosure services (ses) driver. The script will do nothing
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# if you have no enclosure, or if your enclosure isn't supported.
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#
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# Exit codes:
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# 0: enclosure led successfully set
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# 1: enclosure leds not not available
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# 2: enclosure leds administratively disabled
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# 3: ZED didn't pass enclosure sysfs path
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# 4: Enclosure sysfs path doesn't exist
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[ -f "${ZED_ZEDLET_DIR}/zed.rc" ] && . "${ZED_ZEDLET_DIR}/zed.rc"
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. "${ZED_ZEDLET_DIR}/zed-functions.sh"
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if [ ! -d /sys/class/enclosure ] ; then
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exit 1
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fi
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if [ "${ZED_USE_ENCLOSURE_LEDS}" != "1" ] ; then
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exit 2
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fi
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[ -n "${ZEVENT_VDEV_ENC_SYSFS_PATH}" ] || exit 3
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[ -e "${ZEVENT_VDEV_ENC_SYSFS_PATH}/fault" ] || exit 4
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# Turn on/off enclosure LEDs
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function led
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{
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file="$1/fault"
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val=$2
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# We want to check the current state first, since writing to the
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# 'fault' entry always always causes a SES command, even if the
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# current state is already what you want.
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current=$(cat "${file}")
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# On some enclosures if you write 1 to fault, and read it back,
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# it will return 2. Treat all non-zero values as 1 for
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# simplicity.
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if [ "$current" != "0" ] ; then
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current=1
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fi
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if [ "$current" != "$val" ] ; then
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# Set the value twice. I've seen enclosures that were
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# flakey about setting it the first time.
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echo "$val" > "$file"
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echo "$val" > "$file"
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fi
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}
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# Decide whether to turn on/off an LED based on the state
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# Pass in path name and fault string ("ONLINE"/"FAULTED"/"DEGRADED"...etc)
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#
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# We only turn on LEDs when a drive becomes FAULTED, DEGRADED, or UNAVAIL and
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# only turn it on when it comes back ONLINE. All other states are ignored, and
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# keep the previous LED state.
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function process {
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path="$1"
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fault=$2
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if [ "$fault" == "FAULTED" ] || [ "$fault" == "DEGRADED" ] || \
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[ "$fault" == "UNAVAIL" ] ; then
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led "$path" 1
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elif [ "$fault" == "ONLINE" ] ; then
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led "$path" 0
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fi
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}
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process "$ZEVENT_VDEV_ENC_SYSFS_PATH" "$ZEVENT_VDEV_STATE_STR"
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