4.19-stable review patch. If anyone has any objections, please let me know.
------------------ From: Josef Bacik <[email protected]> commit 80ee54bfe8a3850015585ebc84e8d207fcae6831 upstream. We were not handling the reserved byte accounting properly for data references. Metadata was fine, if it errored out the error paths would free the bytes_reserved count and pin the extent, but it even missed one of the error cases. So instead move this handling up into run_one_delayed_ref so we are sure that both cases are properly cleaned up in case of a transaction abort. CC: [email protected] # 4.18+ Reviewed-by: Nikolay Borisov <[email protected]> Signed-off-by: Josef Bacik <[email protected]> Reviewed-by: David Sterba <[email protected]> Signed-off-by: David Sterba <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- fs/btrfs/extent-tree.c | 12 ++++-------- 1 file changed, 4 insertions(+), 8 deletions(-) --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -2366,6 +2366,9 @@ static int run_one_delayed_ref(struct bt insert_reserved); else BUG(); + if (ret && insert_reserved) + btrfs_pin_extent(trans->fs_info, node->bytenr, + node->num_bytes, 1); return ret; } @@ -7977,21 +7980,14 @@ static int alloc_reserved_tree_block(str } path = btrfs_alloc_path(); - if (!path) { - btrfs_free_and_pin_reserved_extent(fs_info, - extent_key.objectid, - fs_info->nodesize); + if (!path) return -ENOMEM; - } path->leave_spinning = 1; ret = btrfs_insert_empty_item(trans, fs_info->extent_root, path, &extent_key, size); if (ret) { btrfs_free_path(path); - btrfs_free_and_pin_reserved_extent(fs_info, - extent_key.objectid, - fs_info->nodesize); return ret; }
