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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