ocfs2/dlm: Create debugfs dirs

This patch creates the debugfs directories that will hold the
files to be used to dump the dlm state.

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, 1 deletions

diff --git a/fs/ocfs2/dlm/dlmdomain.c b/fs/ocfs2/dlm/dlmdomain.c
index 4f7695c851ed..c137d693cef3 100644
--- a/fs/ocfs2/dlm/dlmdomain.c
+++ b/fs/ocfs2/dlm/dlmdomain.c
@@ -33,6 +33,7 @@
 #include <linux/spinlock.h>
 #include <linux/delay.h>
 #include <linux/err.h>
+#include <linux/debugfs.h>
 
 #include "cluster/heartbeat.h"
 #include "cluster/nodemanager.h"
@@ -40,8 +41,8 @@
 
 #include "dlmapi.h"
 #include "dlmcommon.h"
-
 #include "dlmdomain.h"
+#include "dlmdebug.h"
 
 #include "dlmver.h"
 
@@ -298,6 +299,8 @@ static int dlm_wait_on_domain_helper(const char *domain)
 
 static void dlm_free_ctxt_mem(struct dlm_ctxt *dlm)
 {
+        dlm_destroy_debugfs_subroot(dlm);
+
         if (dlm->lockres_hash)
                 dlm_free_pagevec((void **)dlm->lockres_hash, DLM_HASH_PAGES);
 
@@ -1494,6 +1497,7 @@ static struct dlm_ctxt *dlm_alloc_ctxt(const char *domain,
                                 u32 key)
 {
         int i;
+        int ret;
         struct dlm_ctxt *dlm = NULL;
 
         dlm = kzalloc(sizeof(*dlm), GFP_KERNEL);
@@ -1526,6 +1530,15 @@ static struct dlm_ctxt *dlm_alloc_ctxt(const char *domain,
         dlm->key = key;
         dlm->node_num = o2nm_this_node();
 
+        ret = dlm_create_debugfs_subroot(dlm);
+        if (ret < 0) {
+                dlm_free_pagevec((void **)dlm->lockres_hash, DLM_HASH_PAGES);
+                kfree(dlm->name);
+                kfree(dlm);
+                dlm = NULL;
+                goto leave;
+        }
+
         spin_lock_init(&dlm->spinlock);
         spin_lock_init(&dlm->master_lock);
         spin_lock_init(&dlm->ast_lock);
@@ -1851,8 +1864,13 @@ static int __init dlm_init(void)
                 goto error;
         }
 
+        status = dlm_create_debugfs_root();
+        if (status)
+                goto error;
+
         return 0;
 error:
+        dlm_unregister_net_handlers();
         dlm_destroy_lock_cache();
         dlm_destroy_master_caches();
         dlm_destroy_mle_cache();
@@ -1861,6 +1879,7 @@ error:
 
 static void __exit dlm_exit (void)
 {
+        dlm_destroy_debugfs_root();
         dlm_unregister_net_handlers();
         dlm_destroy_lock_cache();
         dlm_destroy_master_caches();