[DLM] add orphan purging code (1/2)

Add code for purging orphan locks.  A process can also purge all of its
own non-orphan locks by passing a pid of zero.  Code already exists for
processes to create persistent locks that become orphans when the process
exits, but the complimentary capability for another process to then purge
these orphans has been missing.

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 178931cca67c..30994d68f6a0 100644
--- a/fs/dlm/dlm_internal.h
+++ b/fs/dlm/dlm_internal.h
@@ -342,6 +342,7 @@ struct dlm_header {
 #define DLM_MSG_LOOKUP          11
 #define DLM_MSG_REMOVE          12
 #define DLM_MSG_LOOKUP_REPLY    13
+#define DLM_MSG_PURGE           14
 
 struct dlm_message {
         struct dlm_header       m_header;