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1. Enable multipath autoreplace support for FMA. This extends FMA autoreplace to work with multipath disks. This requires libdevmapper to be installed at build time. 2. Turn on/off fault LEDs when VDEVs become degraded/faulted/online Set ZED_USE_ENCLOSURE_LEDS=1 in zed.rc to have ZED turn on/off the enclosure LED for a drive when a drive becomes FAULTED/DEGRADED. Your enclosure must be supported by the Linux SES driver for this to work. The enclosure LED scripts work for multipath devices as well. The scripts will clear the LED when the fault is cleared. 3. Rate limit ZIO delay and checksum events so as not to flood ZED ZIO delay and checksum events are rate limited to 5/sec in the zfs module. Reviewed-by: Richard Laager <rlaager@wiktel.com> Reviewed by: Don Brady <don.brady@intel.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Tony Hutter <hutter2@llnl.gov> Closes #2449 Closes #3017 Closes #5159
89 lines
2.4 KiB
Bash
Executable File
89 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/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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