[DLM] canceling deadlocked lock

Add a function that can be used through libdlm by a system daemon to cancel
another process's deadlocked lock.  A completion ast with EDEADLK is returned
to the process waiting for the lock.

Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/fs/dlm/dlm_internal.h b/fs/dlm/dlm_internal.h
index a7435a8df35e..a006fa59e7da 100644
--- a/fs/dlm/dlm_internal.h
+++ b/fs/dlm/dlm_internal.h
@@ -216,6 +216,7 @@ struct dlm_args {
 #define DLM_IFL_ENDOFLIFE       0x00200000
 #define DLM_IFL_WATCH_TIMEWARN  0x00400000
 #define DLM_IFL_TIMEOUT_CANCEL  0x00800000
+#define DLM_IFL_DEADLOCK_CANCEL 0x01000000
 #define DLM_IFL_USER            0x00000001
 #define DLM_IFL_ORPHAN          0x00000002