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Turn on/off enclosure slot fault LED even when disk isn't present

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Previously when a drive faulted, the statechange-led.sh script would lookup
the drive's LED sysfs entry in /sys/block/sd*/device/enclosure_device, and
turn it on.  During testing we noticed that if you pulled out a drive, or if
the drive was so badly broken that it no longer appeared to Linux, that the
/sys/block/sd* path would be removed, and the script could not lookup the
LED entry.

To fix this, this patch looks up the disks's more persistent
"/sys/class/enclosure/X:X:X:X/Slot N" LED sysfs path at pool import.  It then
passes that path to the statechange-led script to use, rather than having the
script look it up on the fly.  This allows the script to turn on/off the slot
LEDs even when the drive is missing.

Closes #5309 
Closes #2375
This commit is contained in:
Tony Hutter
2016-10-24 10:45:59 -07:00
committed by Brian Behlendorf
parent a85cefa35c
commit 1bbd877049
13 changed files with 217 additions and 82 deletions
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include/sys/fm/fs/zfs.h
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@@ -58,6 +58,7 @@ extern "C" {
#define FM_EREPORT_PAYLOAD_ZFS_VDEV_TYPE "vdev_type"
#define FM_EREPORT_PAYLOAD_ZFS_VDEV_PATH "vdev_path"
#define FM_EREPORT_PAYLOAD_ZFS_VDEV_PHYSPATH "vdev_physpath"
#define FM_EREPORT_PAYLOAD_ZFS_VDEV_ENC_SYSFS_PATH "vdev_enc_sysfs_path"
#define FM_EREPORT_PAYLOAD_ZFS_VDEV_DEVID "vdev_devid"
#define FM_EREPORT_PAYLOAD_ZFS_VDEV_FRU "vdev_fru"
#define FM_EREPORT_PAYLOAD_ZFS_VDEV_STATE "vdev_state"