From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qt0-f193.google.com ([209.85.216.193]:42514 "EHLO mail-qt0-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726878AbeH3Vqn (ORCPT ); Thu, 30 Aug 2018 17:46:43 -0400 Received: by mail-qt0-f193.google.com with SMTP id z8-v6so11281428qto.9 for ; Thu, 30 Aug 2018 10:43:28 -0700 (PDT) Received: from localhost ([107.15.81.208]) by smtp.gmail.com with ESMTPSA id p5-v6sm4148146qkd.81.2018.08.30.10.43.26 for (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Thu, 30 Aug 2018 10:43:26 -0700 (PDT) From: Josef Bacik To: linux-btrfs@vger.kernel.org Subject: [PATCH 33/35] btrfs: fix insert_reserved error handling Date: Thu, 30 Aug 2018 13:42:23 -0400 Message-Id: <20180830174225.2200-34-josef@toxicpanda.com> In-Reply-To: <20180830174225.2200-1-josef@toxicpanda.com> References: <20180830174225.2200-1-josef@toxicpanda.com> Sender: linux-btrfs-owner@vger.kernel.org List-ID: 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. Signed-off-by: Josef Bacik --- fs/btrfs/extent-tree.c | 12 ++++-------- 1 file changed, 4 insertions(+), 8 deletions(-) diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 132a1157982c..fd9169f80de0 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -2405,6 +2405,9 @@ static int run_one_delayed_ref(struct btrfs_trans_handle *trans, insert_reserved); else BUG(); + if (ret && insert_reserved) + btrfs_pin_extent(trans->fs_info, node->bytenr, + node->num_bytes, 1); return ret; } @@ -8227,21 +8230,14 @@ static int alloc_reserved_tree_block(struct btrfs_trans_handle *trans, } 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; } -- 2.14.3