From 18674c6cc10e78745f7af7faf26583ea9fe78c38 Mon Sep 17 00:00:00 2001 From: Filipe David Borba Manana Date: Wed, 14 Aug 2013 03:00:21 +0100 Subject: [PATCH] Btrfs: don't miss inode ref items in BTRFS_IOC_INO_LOOKUP If the inode ref key was not found and the current leaf slot was 0 (first item in the leaf) the code would always return -ENOENT. This was not correct because the desired inode ref item might be the last item in the previous leaf. Signed-off-by: Filipe David Borba Manana Signed-off-by: Josef Bacik Signed-off-by: Chris Mason --- fs/btrfs/ioctl.c | 18 ++++++++++-------- 1 file changed, 10 insertions(+), 8 deletions(-) diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index f88eeea365f3..82fb11a361c4 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -2013,19 +2013,21 @@ static noinline int btrfs_search_path_in_tree(struct btrfs_fs_info *info, ret = btrfs_search_slot(NULL, root, &key, path, 0, 0); if (ret < 0) goto out; + else if (ret > 0) { + ret = btrfs_previous_item(root, path, dirid, + BTRFS_INODE_REF_KEY); + if (ret < 0) + goto out; + else if (ret > 0) { + ret = -ENOENT; + goto out; + } + } l = path->nodes[0]; slot = path->slots[0]; - if (ret > 0 && slot > 0) - slot--; btrfs_item_key_to_cpu(l, &key, slot); - if (ret > 0 && (key.objectid != dirid || - key.type != BTRFS_INODE_REF_KEY)) { - ret = -ENOENT; - goto out; - } - iref = btrfs_item_ptr(l, slot, struct btrfs_inode_ref); len = btrfs_inode_ref_name_len(l, iref); ptr -= len + 1;