On Mon, Mar 05, 2018 at 05:13:37PM +0800, Su Yue wrote:
> Previously, btrfs_inode_by_name() returns 0 which leaves caller to
> check objectid of location even location type is invalid.
>
> Let btrfs_inode_by_name() returns -EUCLEAN if found corrupted
> location of a dir entry.
> Removal of label out_err also simplifies the function.
>
> Signed-off-by: Su Yue <suy.f...@cn.fujitsu.com>
Reviewed-by: David Sterba <dste...@suse.com>
> ---
> fs/btrfs/inode.c | 22 ++++++++++------------
> 1 file changed, 10 insertions(+), 12 deletions(-)
>
> diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
> index 53ca025655fc..c7155f9d7c6f 100644
> --- a/fs/btrfs/inode.c
> +++ b/fs/btrfs/inode.c
> @@ -5448,7 +5448,8 @@ void btrfs_evict_inode(struct inode *inode)
>
> /*
> * this returns the key found in the dir entry in the location pointer.
> - * If no dir entries were found, location->objectid is 0.
> + * If no dir entries were found, returns -ENOENT.
> + * If found a corrupted location in dir entry, returns -EUCLEAN.
> */
> static int btrfs_inode_by_name(struct inode *dir, struct dentry *dentry,
> struct btrfs_key *location)
> @@ -5466,27 +5467,27 @@ static int btrfs_inode_by_name(struct inode *dir,
> struct dentry *dentry,
>
> di = btrfs_lookup_dir_item(NULL, root, path, btrfs_ino(BTRFS_I(dir)),
> name, namelen, 0);
> - if (IS_ERR(di))
> + if (unlikely(!di)) {
unlikely is not needed here, removed
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