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89 lines
2.4 KiB
Bash
89 lines
2.4 KiB
Bash
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#!/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/degraded, and turn it back off when
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# it's healthy again. This 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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# This script also requires ZFS to be built with libdevmapper support.
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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 built without libdevmapper
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[ -f "${ZED_ZEDLET_DIR}/zed.rc" ] && . "${ZED_ZEDLET_DIR}/zed.rc"
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. "${ZED_ZEDLET_DIR}/zed-functions.sh"
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# ZEVENT_VDEV_UPATH will not be present if ZFS is not built with libdevmapper
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[ -n "${ZEVENT_VDEV_UPATH}" ] || exit 3
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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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if [ ! -d /sys/class/enclosure ] ; then
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exit 1
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fi
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# Turn on/off enclosure LEDs
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function led
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{
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name=$1
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val=$2
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# We want to check the current state first, since writing to the
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# 'fault' entry always always causes a SES command, even if the
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# current state is already what you want.
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if [ -e /sys/block/$name/device/enclosure_device*/fault ] ; then
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# We have to do some monkey business to deal with spaces in
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# enclosure_device names. I've seen horrible things like this:
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#
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# '/sys/block/sdfw/device/enclosure_device:SLOT 43 41 /fault'
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#
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# ...so escape all spaces.
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file=`ls /sys/block/$name/device/enclosure_device*/fault | sed 's/\s/\\ /g'`
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current=`cat "$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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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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function process {
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# path=/dev/sda, fault=
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path=$1
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fault=$2
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name=`basename $path`
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if [ -z "$name" ] ; then
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return
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fi
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if [ "$fault" == "FAULTED" ] || [ "$fault" == "DEGRADED" ] ; then
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led $name 1
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else
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led $name 0
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fi
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}
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process "$ZEVENT_VDEV_UPATH" "$ZEVENT_VDEV_STATE_STR"
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