[PATCH 19/20] btrfs: move transaction abort to the error site in btrfs_create_free_space_tree()

David Sterba
2024-01-24T21:19:16Z

The recommended pattern for transaction abort after error is to place it
right after the error is handled. That way it's easier to locate where
it failed and help debugging.

Signed-off-by: David Sterba <dsterba@suse.com>
---
fs/btrfs/free-space-tree.c | 19 ++++++++++++-------
1 file changed, 12 insertions(+), 7 deletions(-)

diff --git a/fs/btrfs/free-space-tree.c b/fs/btrfs/free-space-tree.c
index 888185265f4b..bdc2341c43e4 100644
--- a/fs/btrfs/free-space-tree.c
+++ b/fs/btrfs/free-space-tree.c
@@ -1176,12 +1176,16 @@ int btrfs_create_free_space_tree(struct btrfs_fs_info *fs_info)
BTRFS_FREE_SPACE_TREE_OBJECTID);
if (IS_ERR(free_space_root)) {
ret = PTR_ERR(free_space_root);
- goto abort;
+ btrfs_abort_transaction(trans, ret);
+ btrfs_end_transaction(trans);
+ goto out_clear;
}
ret = btrfs_global_root_insert(free_space_root);
if (ret) {
btrfs_put_root(free_space_root);
- goto abort;
+ btrfs_abort_transaction(trans, ret);
+ btrfs_end_transaction(trans);
+ goto out_clear;
}

node = rb_first_cached(&fs_info->block_group_cache_tree);
@@ -1189,8 +1193,11 @@ int btrfs_create_free_space_tree(struct btrfs_fs_info *fs_info)
block_group = rb_entry(node, struct btrfs_block_group,
cache_node);
ret = populate_free_space_tree(trans, block_group);
- if (ret)
- goto abort;
+ if (ret) {
+ btrfs_abort_transaction(trans, ret);
+ btrfs_end_transaction(trans);
+ goto out_clear;
+ }
node = rb_next(node);
}

@@ -1206,11 +1213,9 @@ int btrfs_create_free_space_tree(struct btrfs_fs_info *fs_info)
clear_bit(BTRFS_FS_FREE_SPACE_TREE_UNTRUSTED, &fs_info->flags);
return ret;

-abort:
+out_clear:
clear_bit(BTRFS_FS_CREATING_FREE_SPACE_TREE, &fs_info->flags);
clear_bit(BTRFS_FS_FREE_SPACE_TREE_UNTRUSTED, &fs_info->flags);
- btrfs_abort_transaction(trans, ret);
- btrfs_end_transaction(trans);
return ret;
}

--
2.42.1