ocfs2/dlm: Dump the dlm state in a debugfs file

This patch dumps the dlm state (dlm_ctxt) into a debugfs file.
Useful for debugging.

Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/fs/ocfs2/dlm/dlmdomain.c b/fs/ocfs2/dlm/dlmdomain.c
index c137d693cef3..63f8125824e8 100644
--- a/fs/ocfs2/dlm/dlmdomain.c
+++ b/fs/ocfs2/dlm/dlmdomain.c
@@ -398,6 +398,7 @@ static void dlm_destroy_dlm_worker(struct dlm_ctxt *dlm)
 static void dlm_complete_dlm_shutdown(struct dlm_ctxt *dlm)
 {
         dlm_unregister_domain_handlers(dlm);
+        dlm_debug_shutdown(dlm);
         dlm_complete_thread(dlm);
         dlm_complete_recovery_thread(dlm);
         dlm_destroy_dlm_worker(dlm);
@@ -1418,6 +1419,12 @@ static int dlm_join_domain(struct dlm_ctxt *dlm)
                 goto bail;
         }
 
+        status = dlm_debug_init(dlm);
+        if (status < 0) {
+                mlog_errno(status);
+                goto bail;
+        }
+
         status = dlm_launch_thread(dlm);
         if (status < 0) {
                 mlog_errno(status);
@@ -1485,6 +1492,7 @@ bail:
 
         if (status) {
                 dlm_unregister_domain_handlers(dlm);
+                dlm_debug_shutdown(dlm);
                 dlm_complete_thread(dlm);
                 dlm_complete_recovery_thread(dlm);
                 dlm_destroy_dlm_worker(dlm);