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Allow ECKSUM in vdev_checkpoint_sm_object()

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The checkpoint space map object may not be accessible from the
vdev's ZAP when it has been damaged.  This may be the case when
performing an extreme rewind when importing the pool.

Reviewed-by: Serapheim Dimitropoulos <serapheim@delphix.com>
Reviewed by: Tim Chase <tim@chase2k.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #7809
Closes #7853
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Brian Behlendorf 2018-08-31 14:20:34 -07:00 committed by GitHub
parent adb726eb0e
commit e927fc8a52
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1 changed files with 8 additions and 4 deletions
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12
module/zfs/vdev.c
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@ -2759,8 +2759,8 @@ vdev_resilver_needed(vdev_t *vd, uint64_t *minp, uint64_t *maxp)
/*
* Gets the checkpoint space map object from the vdev's ZAP.
* Returns the spacemap object, or 0 if it wasn't in the ZAP
* or the ZAP doesn't exist yet.
* Returns the spacemap object, or 0 if it wasn't in the ZAP,
* the ZAP doesn't exist yet, or the ZAP is damaged.
*/
int
vdev_checkpoint_sm_object(vdev_t *vd)
@ -2774,8 +2774,12 @@ vdev_checkpoint_sm_object(vdev_t *vd)
int err = zap_lookup(spa_meta_objset(vd->vdev_spa), vd->vdev_top_zap,
VDEV_TOP_ZAP_POOL_CHECKPOINT_SM, sizeof (uint64_t), 1, &sm_obj);
if (err != 0)
VERIFY3S(err, ==, ENOENT);
if (err != 0 && err != ENOENT) {
vdev_dbgmsg(vd, "vdev_load: vdev_checkpoint_sm_objset "
"failed to retrieve checkpoint space map object from "
"vdev ZAP [error=%d]", err);
ASSERT3S(err, ==, ECKSUM);
}
return (sm_obj);
}