UBIFS: add debugfs support

We need to have a possibility to see various UBIFS variables
and ask UBIFS to dump various information. Debugfs is what
we need.

Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index ad44822059c7..2dbaa4fc2cbb 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -1258,6 +1258,10 @@ static int mount_ubifs(struct ubifs_info *c)
                 }
         }
 
+        err = dbg_debugfs_init_fs(c);
+        if (err)
+                goto out_infos;
+
         err = dbg_check_filesystem(c);
         if (err)
                 goto out_infos;
@@ -1369,6 +1373,7 @@ static void ubifs_umount(struct ubifs_info *c)
         dbg_gen("un-mounting UBI device %d, volume %d", c->vi.ubi_num,
                 c->vi.vol_id);
 
+        dbg_debugfs_exit_fs(c);
         spin_lock(&ubifs_infos_lock);
         list_del(&c->infos_list);
         spin_unlock(&ubifs_infos_lock);
@@ -2079,11 +2084,17 @@ static int __init ubifs_init(void)
 
         err = ubifs_compressors_init();
         if (err)
+                goto out_shrinker;
+
+        err = dbg_debugfs_init();
+        if (err)
                 goto out_compr;
 
         return 0;
 
 out_compr:
+        ubifs_compressors_exit();
+out_shrinker:
         unregister_shrinker(&ubifs_shrinker_info);
         kmem_cache_destroy(ubifs_inode_slab);
 out_reg:
@@ -2098,6 +2109,7 @@ static void __exit ubifs_exit(void)
         ubifs_assert(list_empty(&ubifs_infos));
         ubifs_assert(atomic_long_read(&ubifs_clean_zn_cnt) == 0);
 
+        dbg_debugfs_exit();
         ubifs_compressors_exit();
         unregister_shrinker(&ubifs_shrinker_info);
         kmem_cache_destroy(ubifs_inode_slab);