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, 20 insertions, 0 deletions

diff --git a/fs/ocfs2/dlm/dlmdebug.h b/fs/ocfs2/dlm/dlmdebug.h
index b96959512d96..94cc10a4e19c 100644
--- a/fs/ocfs2/dlm/dlmdebug.h
+++ b/fs/ocfs2/dlm/dlmdebug.h
@@ -27,6 +27,19 @@
 
 #ifdef CONFIG_DEBUG_FS
 
+struct dlm_debug_ctxt {
+        struct kref debug_refcnt;
+        struct dentry *debug_state_dentry;
+};
+
+struct debug_buffer {
+        int len;
+        char *buf;
+};
+
+int dlm_debug_init(struct dlm_ctxt *dlm);
+void dlm_debug_shutdown(struct dlm_ctxt *dlm);
+
 int dlm_create_debugfs_subroot(struct dlm_ctxt *dlm);
 void dlm_destroy_debugfs_subroot(struct dlm_ctxt *dlm);
 
@@ -35,6 +48,13 @@ void dlm_destroy_debugfs_root(void);
 
 #else
 
+static int dlm_debug_init(struct dlm_ctxt *dlm)
+{
+        return 0;
+}
+static void dlm_debug_shutdown(struct dlm_ctxt *dlm)
+{
+}
 static int dlm_create_debugfs_subroot(struct dlm_ctxt *dlm)
 {
         return 0;