mirror_zfs

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John Poduska e6b28efccc Prevent race condition in dnode_dest (#10101 )

dnode_special_close() waits for the refcount of dn_holds to go to zero
without holding the dn_mtx. dnode_rele_and_unlock() does the final
remove to dn_holds with dn_mtx being held:

	refs = zfs_refcount_remove(&dn->dn_holds, tag);
	mutex_exit(&dn->dn_mtx);

So, there is a race condition after the remove until dn_mtx is
dropped. During that time, dnode_destroy() can get called, which ends
up in dnode_dest() calling mutex_destroy() and a panic since the lock
is still held.

This change adds a condvar to wait for the final dnode_rele_and_unlock()
to release the dn_mtx before calling dnode_destroy().

Reviewed-by: Paul Dagnelie <pcd@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Matthew Ahrens <mahrens@delphix.com>
Signed-off-by: John Poduska <jpoduska@datto.com>
Closes #7814
Closes #10101

2020-03-12 10:25:56 -07:00

Improve performance of zio_taskq_member

2020-03-03 10:29:38 -08:00

sys

Prevent race condition in dnode_dest (#10101 )

2020-03-12 10:25:56 -07:00

.gitignore

OpenZFS restructuring - move platform specific sources

2019-09-06 11:26:26 -07:00

libnvpair.h

Add JSON output support to channel programs

2018-03-19 12:40:58 -07:00