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Fix "Detach spare vdev in case if resilvering does not happen" 

Spare vdev should detach from the pool when a disk is reinserted.
However, spare detachment depends on the completion of resilvering,
and if resilver does not schedule, the spare vdev keeps attached to
the pool until the next resilvering. When a zfs pool contains
several disks (25+ mirror), resilvering does not always happen when
a disk is reinserted. In this patch, spare vdev is manually detached
from the pool when resilvering does not occur and it has been tested
on both Linux and FreeBSD.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Ameer Hamza <ahamza@ixsystems.com>
Closes #14722
This commit is contained in:
Ameer Hamza 2023-04-19 21:04:32 +05:00 committed by Brian Behlendorf
parent 4a5950a129
commit a68dfdb88c
3 changed files with 15 additions and 3 deletions
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1
include/sys/spa.h
View File

@ -785,6 +785,7 @@ extern int bpobj_enqueue_free_cb(void *arg, const blkptr_t *bp, dmu_tx_t *tx);
#define SPA_ASYNC_L2CACHE_REBUILD 0x800
#define SPA_ASYNC_L2CACHE_TRIM 0x1000
#define SPA_ASYNC_REBUILD_DONE 0x2000
#define SPA_ASYNC_DETACH_SPARE 0x4000
/* device manipulation */
extern int spa_vdev_add(spa_t *spa, nvlist_t *nvroot);

5
module/zfs/spa.c
View File

@ -6987,7 +6987,7 @@ spa_vdev_attach(spa_t *spa, uint64_t guid, nvlist_t *nvroot, int replacing,
* Detach a device from a mirror or replacing vdev.
*
* If 'replace_done' is specified, only detach if the parent
* is a replacing vdev.
* is a replacing or a spare vdev.
*/
int
spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid, int replace_done)
@ -8210,7 +8210,8 @@ spa_async_thread(void *arg)
* If any devices are done replacing, detach them.
*/
if (tasks & SPA_ASYNC_RESILVER_DONE ||
tasks & SPA_ASYNC_REBUILD_DONE) {
tasks & SPA_ASYNC_REBUILD_DONE ||
tasks & SPA_ASYNC_DETACH_SPARE) {
spa_vdev_resilver_done(spa);
}

12
module/zfs/vdev.c
View File

@ -4085,9 +4085,19 @@ vdev_online(spa_t *spa, uint64_t guid, uint64_t flags, vdev_state_t *newstate)
if (wasoffline ||
(oldstate < VDEV_STATE_DEGRADED &&
vd->vdev_state >= VDEV_STATE_DEGRADED))
vd->vdev_state >= VDEV_STATE_DEGRADED)) {
spa_event_notify(spa, vd, NULL, ESC_ZFS_VDEV_ONLINE);
/*
* Asynchronously detach spare vdev if resilver or
* rebuild is not required
*/
if (vd->vdev_unspare &&
!dsl_scan_resilvering(spa->spa_dsl_pool) &&
!dsl_scan_resilver_scheduled(spa->spa_dsl_pool) &&
!vdev_rebuild_active(tvd))
spa_async_request(spa, SPA_ASYNC_DETACH_SPARE);
}
return (spa_vdev_state_exit(spa, vd, 0));
}