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Hold the zfs_snapentry_t before dispatch 

While exceptionally unlikely to cause a problem the zfs_snapentry_t
hold should be taken before the dispatch to prevent any possibility
of the task being processed before the hold.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Chunwei Chen <david.chen@osnexus.com>
This commit is contained in:
Brian Behlendorf 2015-12-14 10:59:25 -08:00 committed by Ned Bass
parent 813a4af70e
commit cb98d1ef27
1 changed files with 1 additions and 1 deletions
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2
module/zfs/zfs_ctldir.c
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@ -381,9 +381,9 @@ zfsctl_snapshot_unmount_delay_impl(zfs_snapentry_t *se, int delay)
if (delay <= 0) if (delay <= 0)
return; return;
zfsctl_snapshot_hold(se);
se->se_taskqid = taskq_dispatch_delay(zfs_expire_taskq, se->se_taskqid = taskq_dispatch_delay(zfs_expire_taskq,
snapentry_expire, se, TQ_SLEEP, ddi_get_lbolt() + delay * HZ); snapentry_expire, se, TQ_SLEEP, ddi_get_lbolt() + delay * HZ);
zfsctl_snapshot_hold(se);
} }
/* /*