mirror of https://gitee.com/openkylin/linux.git
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 <fdmanana@gmail.com> Signed-off-by: Josef Bacik <jbacik@fusionio.com> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
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@ -2013,18 +2013,20 @@ static noinline int btrfs_search_path_in_tree(struct btrfs_fs_info *info,
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ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
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if (ret < 0)
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goto out;
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l = path->nodes[0];
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slot = path->slots[0];
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if (ret > 0 && slot > 0)
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slot--;
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btrfs_item_key_to_cpu(l, &key, slot);
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if (ret > 0 && (key.objectid != dirid ||
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key.type != BTRFS_INODE_REF_KEY)) {
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else if (ret > 0) {
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ret = btrfs_previous_item(root, path, dirid,
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BTRFS_INODE_REF_KEY);
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if (ret < 0)
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goto out;
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else if (ret > 0) {
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ret = -ENOENT;
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goto out;
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}
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}
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l = path->nodes[0];
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slot = path->slots[0];
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btrfs_item_key_to_cpu(l, &key, slot);
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iref = btrfs_item_ptr(l, slot, struct btrfs_inode_ref);
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len = btrfs_inode_ref_name_len(l, iref);
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