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Btrfs: unify error handling of btrfs_lookup_dir_item 

Unify the error handling of directory item lookups using IS_ERR_OR_NULL.
No functional changes.

Signed-off-by: Liu Bo <bo.liu@linux.alibaba.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Liu Bo 2018-09-12 06:06:26 +08:00 committed by David Sterba
parent 3b2fd80160
commit 3cf5068f3d
2 changed files with 7 additions and 22 deletions
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21
fs/btrfs/inode.c
View File

@ -3907,12 +3907,8 @@ static int __btrfs_unlink_inode(struct btrfs_trans_handle *trans,
path->leave_spinning = 1;
di = btrfs_lookup_dir_item(trans, root, path, dir_ino,
name, name_len, -1);
if (IS_ERR(di)) {
ret = PTR_ERR(di);
goto err;
}
if (!di) {
ret = -ENOENT;
if (IS_ERR_OR_NULL(di)) {
ret = di ? PTR_ERR(di) : -ENOENT;
goto err;
}
leaf = path->nodes[0];
@ -4072,10 +4068,7 @@ static int btrfs_unlink_subvol(struct btrfs_trans_handle *trans,
di = btrfs_lookup_dir_item(trans, root, path, dir_ino,
name, name_len, -1);
if (IS_ERR_OR_NULL(di)) {
if (!di)
ret = -ENOENT;
else
ret = PTR_ERR(di);
ret = di ? PTR_ERR(di) : -ENOENT;
goto out;
}
@ -5467,12 +5460,8 @@ 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 (!di) {
ret = -ENOENT;
goto out;
}
if (IS_ERR(di)) {
ret = PTR_ERR(di);
if (IS_ERR_OR_NULL(di)) {
ret = di ? PTR_ERR(di) : -ENOENT;
goto out;
}

8
fs/btrfs/send.c
View File

@ -1693,12 +1693,8 @@ static int lookup_dir_item_inode(struct btrfs_root *root,
di = btrfs_lookup_dir_item(NULL, root, path,
dir, name, name_len, 0);
if (!di) {
ret = -ENOENT;
goto out;
}
if (IS_ERR(di)) {
ret = PTR_ERR(di);
if (IS_ERR_OR_NULL(di)) {
ret = di ? PTR_ERR(di) : -ENOENT;
goto out;
}
btrfs_dir_item_key_to_cpu(path->nodes[0], di, &key);