From patchwork Fri May 10 04:45:05 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qu Wenruo X-Patchwork-Id: 10938243 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 58191933 for ; Fri, 10 May 2019 04:45:28 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3D0CA286D6 for ; Fri, 10 May 2019 04:45:28 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 2A4A228BF5; Fri, 10 May 2019 04:45:28 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B17B5286D6 for ; Fri, 10 May 2019 04:45:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726916AbfEJEpO (ORCPT ); Fri, 10 May 2019 00:45:14 -0400 Received: from mx2.suse.de ([195.135.220.15]:38704 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725904AbfEJEpO (ORCPT ); Fri, 10 May 2019 00:45:14 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id DB81CAE4E; Fri, 10 May 2019 04:45:12 +0000 (UTC) From: Qu Wenruo To: linux-btrfs@vger.kernel.org Cc: kernel test robot Subject: [PATCH] btrfs: extent-tree: Fix a bug that btrfs is unable to add pinned bytes Date: Fri, 10 May 2019 12:45:05 +0800 Message-Id: <20190510044505.17422-1-wqu@suse.com> X-Mailer: git-send-email 2.21.0 MIME-Version: 1.0 Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Commit ddf30cf03fb5 ("btrfs: extent-tree: Use btrfs_ref to refactor add_pinned_bytes()") refactored add_pinned_bytes(), but during that refactor, there are two callers which add the pinned bytes instead of subtracting. That refactor misses those two caller, causing incorrect pinned bytes calculation and resulting unexpected ENOSPC error. Fix it by adding a new parameter @sign to restore the original behavior. Reported-by: kernel test robot Fixes: ddf30cf03fb5 ("btrfs: extent-tree: Use btrfs_ref to refactor add_pinned_bytes()") Signed-off-by: Qu Wenruo --- fs/btrfs/extent-tree.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index f79e477a378e..8592d31e321c 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -757,12 +757,14 @@ static struct btrfs_space_info *__find_space_info(struct btrfs_fs_info *info, } static void add_pinned_bytes(struct btrfs_fs_info *fs_info, - struct btrfs_ref *ref) + struct btrfs_ref *ref, int sign) { struct btrfs_space_info *space_info; - s64 num_bytes = -ref->len; + s64 num_bytes; u64 flags; + ASSERT(sign == 1 || sign == -1); + num_bytes = sign * ref->len; if (ref->type == BTRFS_REF_METADATA) { if (ref->tree_ref.root == BTRFS_CHUNK_TREE_OBJECTID) flags = BTRFS_BLOCK_GROUP_SYSTEM; @@ -2063,7 +2065,7 @@ int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, btrfs_ref_tree_mod(fs_info, generic_ref); if (ret == 0 && old_ref_mod < 0 && new_ref_mod >= 0) - add_pinned_bytes(fs_info, generic_ref); + add_pinned_bytes(fs_info, generic_ref, -1); return ret; } @@ -7190,7 +7192,7 @@ void btrfs_free_tree_block(struct btrfs_trans_handle *trans, } out: if (pin) - add_pinned_bytes(fs_info, &generic_ref); + add_pinned_bytes(fs_info, &generic_ref, 1); if (last_ref) { /* @@ -7238,7 +7240,7 @@ int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref) btrfs_ref_tree_mod(fs_info, ref); if (ret == 0 && old_ref_mod >= 0 && new_ref_mod < 0) - add_pinned_bytes(fs_info, ref); + add_pinned_bytes(fs_info, ref, 1); return ret; }