svn commit: r323756 - stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs
Andriy Gapon
avg at FreeBSD.org
Tue Sep 19 09:15:09 UTC 2017
Author: avg
Date: Tue Sep 19 09:15:07 2017
New Revision: 323756
URL: https://svnweb.freebsd.org/changeset/base/323756
Log:
MFC r322228: MFV r322227: 8377 Panic in bookmark deletion
illumos/illumos-gate at 42418f9e73f0d007aa87675ecc206c26fc8e073e
https://github.com/illumos/illumos-gate/commit/42418f9e73f0d007aa87675ecc206c26fc8e073e
https://www.illumos.org/issues/8377
The problem is that when dsl_bookmark_destroy_check() is executed from open
context (the pre-check), it fills in dbda_success based on the existence of the
bookmark.
But the bookmark (or containing filesystem as in this case) can be destroyed
before we get to syncing context. When we re-run dsl_bookmark_destroy_check()
in syncing
context, it will not add the deleted bookmark to dbda_success, intending for
dsl_bookmark_destroy_sync() to not process it. But because the bookmark is
still in dbda_success
from the open-context call, we do try to destroy it.
The fix is that dsl_bookmark_destroy_check() should not modify dbda_success
when called from open context.
Reviewed by: Paul Dagnelie <pcd at delphix.com>
Reviewed by: Pavel Zakharov <pavel.zakharov at delphix.com>
Reviewed by: George Wilson <george.wilson at delphix.com>
Approved by: Robert Mustacchi <rm at joyent.com>
Author: Matthew Ahrens <mahrens at delphix.com>
Modified:
stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_bookmark.c
Directory Properties:
stable/10/ (props changed)
Modified: stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_bookmark.c
==============================================================================
--- stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_bookmark.c Tue Sep 19 09:11:07 2017 (r323755)
+++ stable/10/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_bookmark.c Tue Sep 19 09:15:07 2017 (r323756)
@@ -356,6 +356,9 @@ dsl_bookmark_destroy_check(void *arg, dmu_tx_t *tx)
dsl_pool_t *dp = dmu_tx_pool(tx);
int rv = 0;
+ ASSERT(nvlist_empty(dbda->dbda_success));
+ ASSERT(nvlist_empty(dbda->dbda_errors));
+
if (!spa_feature_is_enabled(dp->dp_spa, SPA_FEATURE_BOOKMARKS))
return (0);
@@ -385,7 +388,10 @@ dsl_bookmark_destroy_check(void *arg, dmu_tx_t *tx)
}
}
if (error == 0) {
- fnvlist_add_boolean(dbda->dbda_success, fullname);
+ if (dmu_tx_is_syncing(tx)) {
+ fnvlist_add_boolean(dbda->dbda_success,
+ fullname);
+ }
} else {
fnvlist_add_int32(dbda->dbda_errors, fullname, error);
rv = error;
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