ubifs: Add comments and debug info for ubifs_xrename()

Just like other operations (eg. ubifs_create, do_rename), add comments
and debug information for ubifs_xrename().

Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: Richard Weinberger <richard@nod.at>

diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c
index 94634b8..7a1dcd1 100644 (file)
--- a/fs/ubifs/dir.c
+++ b/fs/ubifs/dir.c
@@ -1566,6 +1566,15 @@ static int ubifs_xrename(struct inode *old_dir, struct dentry *old_dentry,
 
        ubifs_assert(c, fst_inode && snd_inode);
 
+       /*
+        * Budget request settings: changing two direntries, changing the two
+        * parent directory inodes.
+        */
+
+       dbg_gen("dent '%pd' ino %lu in dir ino %lu exchange dent '%pd' ino %lu in dir ino %lu",
+               old_dentry, fst_inode->i_ino, old_dir->i_ino,
+               new_dentry, snd_inode->i_ino, new_dir->i_ino);
+
        err = fscrypt_setup_filename(old_dir, &old_dentry->d_name, 0, &fst_nm);
        if (err)
                return err;