From patchwork Thu Mar 9 01:34:38 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qu Wenruo X-Patchwork-Id: 9612189 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id EABF3602B4 for ; Thu, 9 Mar 2017 01:43:46 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id DAADA28647 for ; Thu, 9 Mar 2017 01:43:46 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CCC4F2864B; Thu, 9 Mar 2017 01:43:46 +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=-6.9 required=2.0 tests=BAYES_00,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 0B8AE28647 for ; Thu, 9 Mar 2017 01:43:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754809AbdCIBnn (ORCPT ); Wed, 8 Mar 2017 20:43:43 -0500 Received: from cn.fujitsu.com ([59.151.112.132]:17783 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1754801AbdCIBnl (ORCPT ); Wed, 8 Mar 2017 20:43:41 -0500 X-IronPort-AV: E=Sophos;i="5.22,518,1449504000"; d="scan'208";a="16354886" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 09 Mar 2017 09:35:33 +0800 Received: from G08CNEXCHPEKD01.g08.fujitsu.local (unknown [10.167.33.80]) by cn.fujitsu.com (Postfix) with ESMTP id 2958B47D8B8B; Thu, 9 Mar 2017 09:35:32 +0800 (CST) Received: from localhost.localdomain (10.167.226.34) by G08CNEXCHPEKD01.g08.fujitsu.local (10.167.33.89) with Microsoft SMTP Server (TLS) id 14.3.319.2; Thu, 9 Mar 2017 09:35:32 +0800 From: Qu Wenruo To: , Subject: [PATCH v3.1 3/7] btrfs: Do chunk level degradation check for remount Date: Thu, 9 Mar 2017 09:34:38 +0800 Message-ID: <20170309013442.19957-4-quwenruo@cn.fujitsu.com> X-Mailer: git-send-email 2.12.0 In-Reply-To: <20170309013442.19957-1-quwenruo@cn.fujitsu.com> References: <20170309013442.19957-1-quwenruo@cn.fujitsu.com> MIME-Version: 1.0 X-Originating-IP: [10.167.226.34] X-yoursite-MailScanner-ID: 2958B47D8B8B.AD346 X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: quwenruo@cn.fujitsu.com 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 Just the same for mount time check, use btrfs_check_rw_degradable() to check if we are OK to be remounted rw. Signed-off-by: Qu Wenruo Tested-by: Austin S. Hemmelgarn Tested-by: Adam Borowski Tested-by: Dmitrii Tcvetkov --- fs/btrfs/super.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index da687dc79cce..1f5772501c92 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -1784,9 +1784,8 @@ static int btrfs_remount(struct super_block *sb, int *flags, char *data) goto restore; } - if (fs_info->fs_devices->missing_devices > - fs_info->num_tolerated_disk_barrier_failures && - !(*flags & MS_RDONLY)) { + if (!(*flags & MS_RDONLY) && + !btrfs_check_rw_degradable(fs_info)) { btrfs_warn(fs_info, "too many missing devices, writeable remount is not allowed"); ret = -EACCES;