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FreeBSD rS271776 - Persist vdev_resilver_txg changes 

Persist vdev_resilver_txg changes to avoid panic caused by validation
vs a vdev_resilver_txg value from a previous resilver.

Authored-by: smh <smh@FreeBSD.org>
Ported-by: Chris Dunlop <chris@onthe.net.au>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>

OpenZFS-issue: https://www.illumos.org/issues/5154
FreeBSD-issue: https://reviews.freebsd.org/rS271776
FreeBSD-commit: https://github.com/freebsd/freebsd/commit/c3c60bf
Closes #4790
This commit is contained in:
smh 2016-06-24 00:45:19 +10:00 committed by Ned Bass
parent e5c02cbb03
commit 3d824a8878
1 changed files with 5 additions and 2 deletions
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7
module/zfs/vdev.c
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@ -1894,12 +1894,15 @@ vdev_dtl_reassess(vdev_t *vd, uint64_t txg, uint64_t scrub_txg, int scrub_done)
/*
* If the vdev was resilvering and no longer has any
* DTLs then reset its resilvering flag.
* DTLs then reset its resilvering flag and dirty
* the top level so that we persist the change.
*/
if (vd->vdev_resilver_txg != 0 &&
range_tree_space(vd->vdev_dtl[DTL_MISSING]) == 0 &&
range_tree_space(vd->vdev_dtl[DTL_OUTAGE]) == 0)
range_tree_space(vd->vdev_dtl[DTL_OUTAGE]) == 0) {
vd->vdev_resilver_txg = 0;
vdev_config_dirty(vd->vdev_top);
}
mutex_exit(&vd->vdev_dtl_lock);