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btrfs: simplify error handling at btrfs_del_root_ref() 

At btrfs_del_root_ref() we are using two return variables, named 'ret'
and 'err'. This makes it harder to follow and easier to return the wrong
value in case an error happens - the previous patch in the series, which
has the subject "btrfs: fix silent failure when deleting root
reference", fixed a bug due to confusion created by these two variables.

So change the function to use a single variable for tracking the return
value of the function, using only 'ret', which is consistent with most
of the codebase.

Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Filipe Manana 2022-08-22 15:47:10 +01:00 committed by David Sterba
parent 48ff70830b
commit 1fdbd03d3d
1 changed files with 7 additions and 9 deletions
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16
fs/btrfs/root-tree.c
View File

@ -337,7 +337,6 @@ int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
struct extent_buffer *leaf;
struct btrfs_key key;
unsigned long ptr;
int err = 0;
int ret;
path = btrfs_alloc_path();
@ -350,7 +349,6 @@ int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
again:
ret = btrfs_search_slot(trans, tree_root, &key, path, -1, 1);
if (ret < 0) {
err = ret;
goto out;
} else if (ret == 0) {
leaf = path->nodes[0];
@ -360,18 +358,18 @@ int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
if ((btrfs_root_ref_dirid(leaf, ref) != dirid) ||
(btrfs_root_ref_name_len(leaf, ref) != name_len) ||
memcmp_extent_buffer(leaf, name, ptr, name_len)) {
err = -ENOENT;
ret = -ENOENT;
goto out;
}
*sequence = btrfs_root_ref_sequence(leaf, ref);
ret = btrfs_del_item(trans, tree_root, path);
if (ret) {
err = ret;
if (ret)
goto out;
}
} else
err = -ENOENT;
} else {
ret = -ENOENT;
goto out;
}
if (key.type == BTRFS_ROOT_BACKREF_KEY) {
btrfs_release_path(path);
@ -383,7 +381,7 @@ int btrfs_del_root_ref(struct btrfs_trans_handle *trans, u64 root_id,
out:
btrfs_free_path(path);
return err;
return ret;
}
/*