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Illumos 5630 - stale bonus buffer in recycled dnode_t leads to data corruption

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5630 stale bonus buffer in recycled dnode_t leads to data corruption
Author: Justin T. Gibbs <justing@spectralogic.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: George Wilson <george@delphix.com>
Reviewed by: Will Andrews <will@freebsd.org>
Approved by: Robert Mustacchi <rm@joyent.com>

References:
  https://www.illumos.org/issues/5630
  https://github.com/illumos/illumos-gate/commit/cd485b4

Ported-by: Chris Dunlop <chris@onthe.net.au>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Richard Yao <ryao@gentoo.org>
Issue #3172
This commit is contained in:
Justin T. Gibbs
2015-03-12 11:10:35 +11:00
committed by Brian Behlendorf
parent 73ad4a9f3c
commit 4c7b7eedcd
4 changed files with 65 additions and 12 deletions
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module/zfs/dnode_sync.c
+6
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@@ -454,6 +454,12 @@ dnode_evict_dbufs(dnode_t *dn)
if (pass >= 100)
dprintf("Required %d passes to evict dbufs\n", pass);
dnode_evict_bonus(dn);
}
void
dnode_evict_bonus(dnode_t *dn)
{
rw_enter(&dn->dn_struct_rwlock, RW_WRITER);
if (dn->dn_bonus && refcount_is_zero(&dn->dn_bonus->db_holds)) {
mutex_enter(&dn->dn_bonus->db_mtx);