zed.d/pool_import-led.sh: fix for current zpool scripts
Also minor clean-up with folding state_to_val() into a case, unrolling the lesser-available seq into numbers, ignoring vdev states we don't care about, and documentation comments Signed-off-by: Tony Hutter <hutter2@llnl.gov> Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz> Closes #11934 Closes #11935
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Brian Behlendorf
parent
1a7d7182ac
commit
71def603cd
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@ -1,21 +1,21 @@
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#!/bin/sh
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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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# Turn off/on vdevs' enclosure fault LEDs when their pool's state changes.
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#
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# Turn the VDEV's fault LED on if it becomes FAULTED, DEGRADED or UNAVAIL.
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# Turn the LED off when it's back ONLINE again.
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# Turn a vdev's fault LED on if it becomes FAULTED, DEGRADED or UNAVAIL.
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# Turn its LED off when it's back ONLINE again.
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#
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# This script run in two basic modes:
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#
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# 1. If $ZEVENT_VDEV_ENC_SYSFS_PATH and $ZEVENT_VDEV_STATE_STR are set, then
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# only set the LED for that particular VDEV. This is the case for statechange
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# only set the LED for that particular vdev. This is the case for statechange
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# events and some vdev_* events.
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#
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# 2. If those vars are not set, then check the state of all VDEVs in the pool
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# 2. If those vars are not set, then check the state of all vdevs in the pool
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# and set the LEDs accordingly. This is the case for pool_import events.
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#
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# Note that 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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# 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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@ -59,6 +59,10 @@ check_and_set_led()
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file="$1"
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val="$2"
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if [ -z "$val" ]; then
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return 0
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fi
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if [ ! -e "$file" ] ; then
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return 3
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fi
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@ -66,11 +70,11 @@ check_and_set_led()
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# If another process is accessing the LED when we attempt to update it,
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# the update will be lost so retry until the LED actually changes or we
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# timeout.
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for _ in $(seq 1 5); do
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for _ in 1 2 3 4 5; do
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# We want to check the current state first, since writing to the
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# 'fault' entry always causes a SES command, even if the
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# current state is already what you want.
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current=$(cat "${file}")
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read -r current < "${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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@ -85,27 +89,29 @@ check_and_set_led()
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else
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break
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fi
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done
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done
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}
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state_to_val()
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{
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state="$1"
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if [ "$state" = "FAULTED" ] || [ "$state" = "DEGRADED" ] || \
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[ "$state" = "UNAVAIL" ] ; then
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echo 1
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elif [ "$state" = "ONLINE" ] ; then
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echo 0
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fi
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case "$state" in
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FAULTED|DEGRADED|UNAVAIL)
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echo 1
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;;
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ONLINE)
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echo 0
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;;
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esac
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}
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# process_pool ([pool])
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# process_pool (pool)
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#
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# Iterate through a pool (or pools) and set the VDEV's enclosure slot LEDs to
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# the VDEV's state.
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# Iterate through a pool and set the vdevs' enclosure slot LEDs to
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# those vdevs' state.
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#
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# Arguments
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# pool: Optional pool name. If not specified, iterate though all pools.
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# pool: Pool name.
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#
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# Return
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# 0 on success, 3 on missing sysfs path
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@ -113,19 +119,22 @@ state_to_val()
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process_pool()
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{
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pool="$1"
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# The output will be the vdevs only (from "grep '/dev/'"):
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#
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# U45 ONLINE 0 0 0 /dev/sdk 0
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# U46 ONLINE 0 0 0 /dev/sdm 0
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# U47 ONLINE 0 0 0 /dev/sdn 0
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# U50 ONLINE 0 0 0 /dev/sdbn 0
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#
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ZPOOL_SCRIPTS_AS_ROOT=1 $ZPOOL status -c upath,fault_led "$pool" | grep '/dev/' | (
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rc=0
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# Lookup all the current LED values and paths in parallel
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#shellcheck disable=SC2016
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cmd='echo led_token=$(cat "$VDEV_ENC_SYSFS_PATH/fault"),"$VDEV_ENC_SYSFS_PATH",'
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out=$($ZPOOL status -vc "$cmd" "$pool" | grep 'led_token=')
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#shellcheck disable=SC2034
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echo "$out" | while read -r vdev state read write chksum therest; do
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while read -r vdev state _ _ _ therest; do
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# Read out current LED value and path
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tmp=$(echo "$therest" | sed 's/^.*led_token=//g')
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vdev_enc_sysfs_path=$(echo "$tmp" | awk -F ',' '{print $2}')
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current_val=$(echo "$tmp" | awk -F ',' '{print $1}')
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# Get dev name (like 'sda')
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dev=$(basename "$(echo "$therest" | awk '{print $(NF-1)}')")
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vdev_enc_sysfs_path=$(realpath "/sys/class/block/$dev/device/enclosure_device"*)
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current_val=$(echo "$therest" | awk '{print $NF}')
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if [ "$current_val" != "0" ] ; then
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current_val=1
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@ -137,36 +146,27 @@ process_pool()
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fi
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if [ ! -e "$vdev_enc_sysfs_path/fault" ] ; then
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#shellcheck disable=SC2030
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rc=1
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rc=3
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zed_log_msg "vdev $vdev '$file/fault' doesn't exist"
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continue;
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continue
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fi
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val=$(state_to_val "$state")
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if [ "$current_val" = "$val" ] ; then
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# LED is already set correctly
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continue;
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continue
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fi
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if ! check_and_set_led "$vdev_enc_sysfs_path/fault" "$val"; then
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rc=1
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rc=3
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fi
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done
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#shellcheck disable=SC2031
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if [ "$rc" = "0" ] ; then
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return 0
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else
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# We didn't see a sysfs entry that we wanted to set
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return 3
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fi
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exit "$rc"; )
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}
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if [ -n "$ZEVENT_VDEV_ENC_SYSFS_PATH" ] && [ -n "$ZEVENT_VDEV_STATE_STR" ] ; then
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# Got a statechange for an individual VDEV
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# Got a statechange for an individual vdev
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val=$(state_to_val "$ZEVENT_VDEV_STATE_STR")
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vdev=$(basename "$ZEVENT_VDEV_PATH")
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check_and_set_led "$ZEVENT_VDEV_ENC_SYSFS_PATH/fault" "$val"
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