diff options
| author | Filipe Manana <fdmanana@gmail.com> | 2014-03-21 13:46:54 +0100 |
|---|---|---|
| committer | Chris Mason <clm@fb.com> | 2014-06-10 02:20:37 +0200 |
| commit | b46ab97bcd4ae7954b3a150f642a82cdd1434f40 (patch) | |
| tree | 0e4114a0bd2be5e30dc8b1424137970bc3e30c97 /fs/btrfs/send.c | |
| parent | btrfs: add dev maxs limit for __btrfs_alloc_chunk in kernel space (diff) | |
| download | linux-b46ab97bcd4ae7954b3a150f642a82cdd1434f40.tar.xz linux-b46ab97bcd4ae7954b3a150f642a82cdd1434f40.zip | |
Btrfs: send, avoid unnecessary inode item lookup in the btree
Regardless of whether the caller is interested or not in knowing the inode's
generation (dir_gen != NULL), get_first_ref always does a btree lookup to get
the inode item. Avoid this useless lookup if dir_gen parameter is NULL (which
is in some cases).
Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com>
Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs/btrfs/send.c')
| -rw-r--r-- | fs/btrfs/send.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c index c76400dda4df..98e9e0cf7e8e 100644 --- a/fs/btrfs/send.c +++ b/fs/btrfs/send.c @@ -1693,10 +1693,12 @@ static int get_first_ref(struct btrfs_root *root, u64 ino, goto out; btrfs_release_path(path); - ret = get_inode_info(root, parent_dir, NULL, dir_gen, NULL, NULL, - NULL, NULL); - if (ret < 0) - goto out; + if (dir_gen) { + ret = get_inode_info(root, parent_dir, NULL, dir_gen, NULL, + NULL, NULL, NULL); + if (ret < 0) + goto out; + } *dir = parent_dir; @@ -1712,13 +1714,12 @@ static int is_first_ref(struct btrfs_root *root, int ret; struct fs_path *tmp_name; u64 tmp_dir; - u64 tmp_dir_gen; tmp_name = fs_path_alloc(); if (!tmp_name) return -ENOMEM; - ret = get_first_ref(root, ino, &tmp_dir, &tmp_dir_gen, tmp_name); + ret = get_first_ref(root, ino, &tmp_dir, NULL, tmp_name); if (ret < 0) goto out; |