ceph: include link to bdi in debugfs

Signed-off-by: Sage Weil <sage@newdream.net>

1 files changed, 7 insertions, 0 deletions

diff --git a/fs/ceph/debugfs.c b/fs/ceph/debugfs.c
index b90fc3e1ff70..441484ab7e94 100644
--- a/fs/ceph/debugfs.c
+++ b/fs/ceph/debugfs.c
@@ -1,5 +1,6 @@
 #include "ceph_debug.h"
 
+#include <linux/device.h>
 #include <linux/module.h>
 #include <linux/ctype.h>
 #include <linux/debugfs.h>
@@ -24,6 +25,7 @@
  *      .../monc        - mon client state
  *      .../dentry_lru  - dump contents of dentry lru
  *      .../caps        - expose cap (reservation) stats
+ *      .../bdi         - symlink to ../../bdi/something
  */
 
 static struct dentry *ceph_debugfs_dir;
@@ -407,6 +409,10 @@ int ceph_debugfs_client_init(struct ceph_client *client)
         if (!client->debugfs_caps)
                 goto out;
 
+        sprintf(name, "../../bdi/%s", dev_name(client->sb->s_bdi->dev));
+        client->debugfs_bdi = debugfs_create_symlink("bdi", client->debugfs_dir,
+                                                     name);
+
         return 0;
 
 out:
@@ -416,6 +422,7 @@ out:
 
 void ceph_debugfs_client_cleanup(struct ceph_client *client)
 {
+        debugfs_remove(client->debugfs_bdi);
         debugfs_remove(client->debugfs_caps);
         debugfs_remove(client->debugfs_dentry_lru);
         debugfs_remove(client->debugfs_osdmap);