6.16-stable review patch. If anyone has any objections, please let me know.
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From: Filipe Manana fdmanana@suse.com
[ Upstream commit 1f06c942aa709d397cf6bed577a0d10a61509667 ]
Only one of the callers of __add_block_group_free_space() aborts the transaction if the call fails, while the others don't do it and it's either never done up the call chain or much higher in the call chain.
So make sure we abort the transaction at __add_block_group_free_space() if it fails, which brings a couple benefits:
1) If some call chain never aborts the transaction, we avoid having some metadata inconsistency because BLOCK_GROUP_FLAG_NEEDS_FREE_SPACE is cleared when we enter __add_block_group_free_space() and therefore __add_block_group_free_space() is never called again to add the block group items to the free space tree, since the function is only called when that flag is set in a block group;
2) If the call chain already aborts the transaction, then we get a better trace that points to the exact step from __add_block_group_free_space() which failed, which is better for analysis.
So abort the transaction at __add_block_group_free_space() if any of its steps fails.
CC: stable@vger.kernel.org # 6.6+ Reviewed-by: Boris Burkov boris@bur.io Signed-off-by: Filipe Manana fdmanana@suse.com Reviewed-by: David Sterba dsterba@suse.com Signed-off-by: David Sterba dsterba@suse.com Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/btrfs/free-space-tree.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-)
--- a/fs/btrfs/free-space-tree.c +++ b/fs/btrfs/free-space-tree.c @@ -1431,12 +1431,17 @@ static int __add_block_group_free_space( set_bit(BLOCK_GROUP_FLAG_FREE_SPACE_ADDED, &block_group->runtime_flags);
ret = add_new_free_space_info(trans, block_group, path); - if (ret) + if (ret) { + btrfs_abort_transaction(trans, ret); return ret; + }
- return __add_to_free_space_tree(trans, block_group, path, - block_group->start, - block_group->length); + ret = __add_to_free_space_tree(trans, block_group, path, + block_group->start, block_group->length); + if (ret) + btrfs_abort_transaction(trans, ret); + + return 0; }
int add_block_group_free_space(struct btrfs_trans_handle *trans, @@ -1461,9 +1466,6 @@ int add_block_group_free_space(struct bt }
ret = __add_block_group_free_space(trans, block_group, path); - if (ret) - btrfs_abort_transaction(trans, ret); - out: btrfs_free_path(path); mutex_unlock(&block_group->free_space_lock);