btrfs: Open-code name_in_log_ref in replay_one_name

That function adds unnecessary indirection between backref_in_log and
the caller. Furthermore it also "downgrades" backref_in_log's return
value to a boolean, when in fact it could very well be an error.

Rectify the situation by simply opencoding name_in_log_ref in
replay_one_name and properly handling possible return codes from
backref_in_log.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ update comment ]
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 24fa656..fa35fb8 100644 (file)
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -1868,33 +1868,6 @@ static noinline int insert_one_name(struct btrfs_trans_handle *trans,
 }
 
 /*
- * Return true if an inode reference exists in the log for the given name,
- * inode and parent inode.
- */
-static bool name_in_log_ref(struct btrfs_root *log_root,
-                           const char *name, const int name_len,
-                           const u64 dirid, const u64 ino)
-{
-       struct btrfs_key search_key;
-       int ret;
-
-       search_key.objectid = ino;
-       search_key.type = BTRFS_INODE_REF_KEY;
-       search_key.offset = dirid;
-       ret = backref_in_log(log_root, &search_key, dirid, name, name_len);
-       if (ret == 1)
-               return true;
-
-       search_key.type = BTRFS_INODE_EXTREF_KEY;
-       search_key.offset = btrfs_extref_hash(dirid, name, name_len);
-       ret = backref_in_log(log_root, &search_key, dirid, name, name_len);
-       if (ret == 1)
-               return true;
-
-       return false;
-}
-
-/*
  * take a single entry in a log directory item and replay it into
  * the subvolume.
  *
@@ -2010,8 +1983,31 @@ out:
        return ret;
 
 insert:
-       if (name_in_log_ref(root->log_root, name, name_len,
-                           key->objectid, log_key.objectid)) {
+       /*
+        * Check if the inode reference exists in the log for the given name,
+        * inode and parent inode
+        */
+       found_key.objectid = log_key.objectid;
+       found_key.type = BTRFS_INODE_REF_KEY;
+       found_key.offset = key->objectid;
+       ret = backref_in_log(root->log_root, &found_key, 0, name, name_len);
+       if (ret < 0) {
+               goto out;
+       } else if (ret) {
+               /* The dentry will be added later. */
+               ret = 0;
+               update_size = false;
+               goto out;
+       }
+
+       found_key.objectid = log_key.objectid;
+       found_key.type = BTRFS_INODE_EXTREF_KEY;
+       found_key.offset = key->objectid;
+       ret = backref_in_log(root->log_root, &found_key, key->objectid, name,
+                            name_len);
+       if (ret < 0) {
+               goto out;
+       } else if (ret) {
                /* The dentry will be added later. */
                ret = 0;
                update_size = false;