ceph: include link to bdi in debugfs

[deliverable/linux.git] / fs / ceph / debugfs.c

diff --git a/fs/ceph/debugfs.c b/fs/ceph/debugfs.c
index b90fc3e1ff709f2ec82321a937b541933337caf4..441484ab7e948bd9a8fd6b0c13c6f2c810f76636 100644 (file)
--- 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);