From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 80FC1C3A5A1 for ; Fri, 23 Aug 2019 01:09:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5CCFC233A0 for ; Fri, 23 Aug 2019 01:09:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387589AbfHWBJZ (ORCPT ); Thu, 22 Aug 2019 21:09:25 -0400 Received: from icp-osb-irony-out2.external.iinet.net.au ([203.59.1.155]:5622 "EHLO icp-osb-irony-out2.external.iinet.net.au" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732721AbfHWBJY (ORCPT ); Thu, 22 Aug 2019 21:09:24 -0400 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: =?us-ascii?q?A2DWAQAROl9d/3Wz0XYNWBwBAQEEAQE?= =?us-ascii?q?HBAEBgWeEM4Qgj1YBAQaBEYoRkSMJAQEBAQEBAQEBNwEBhDoDAgKDAjgTAgk?= =?us-ascii?q?BAQEEAQIBAQYDAYVYhhkCAQMjBFIQGA0CJgICRxAGE4UZq1BzfzMaikCBDCi?= =?us-ascii?q?BY4okeIEHgREzgx2HT4JYBIw9gleGD0KVdwmCH5RYDIIlizYDEIpQLYNzo2G?= =?us-ascii?q?BeU0uCoMngk4Xji9ljFYBAQ?= X-IPAS-Result: =?us-ascii?q?A2DWAQAROl9d/3Wz0XYNWBwBAQEEAQEHBAEBgWeEM4Qgj?= =?us-ascii?q?1YBAQaBEYoRkSMJAQEBAQEBAQEBNwEBhDoDAgKDAjgTAgkBAQEEAQIBAQYDA?= =?us-ascii?q?YVYhhkCAQMjBFIQGA0CJgICRxAGE4UZq1BzfzMaikCBDCiBY4okeIEHgREzg?= =?us-ascii?q?x2HT4JYBIw9gleGD0KVdwmCH5RYDIIlizYDEIpQLYNzo2GBeU0uCoMngk4Xj?= =?us-ascii?q?i9ljFYBAQ?= X-IronPort-AV: E=Sophos;i="5.64,419,1559491200"; d="scan'208";a="231796820" Received: from unknown (HELO [192.168.1.222]) ([118.209.179.117]) by icp-osb-irony-out2.iinet.net.au with ESMTP; 23 Aug 2019 09:00:11 +0800 Subject: [PATCH v2 10/15] xfs: mount-api - add xfs_remount_ro() helper From: Ian Kent To: linux-xfs Cc: Dave Chinner , David Howells , Al Viro , Eric Sandeen Date: Fri, 23 Aug 2019 09:00:11 +0800 Message-ID: <156652201167.2607.13546126033802147753.stgit@fedora-28> In-Reply-To: <156652158924.2607.14608448087216437699.stgit@fedora-28> References: <156652158924.2607.14608448087216437699.stgit@fedora-28> User-Agent: StGit/unknown-version MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-xfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org Factor the remount read only code into a helper to simplify the subsequent change from the super block method .remount_fs to the mount-api fs_context_operations method .reconfigure. Signed-off-by: Ian Kent --- fs/xfs/xfs_super.c | 73 +++++++++++++++++++++++++++++++--------------------- 1 file changed, 43 insertions(+), 30 deletions(-) diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c index 9f7300958a38..76374d602257 100644 --- a/fs/xfs/xfs_super.c +++ b/fs/xfs/xfs_super.c @@ -1403,6 +1403,47 @@ xfs_remount_rw( return 0; } +STATIC int +xfs_remount_ro( + struct xfs_mount *mp) +{ + int error; + + /* + * Cancel background eofb scanning so it cannot race with the + * final log force+buftarg wait and deadlock the remount. + */ + xfs_stop_block_reaping(mp); + + /* Get rid of any leftover CoW reservations... */ + error = xfs_icache_free_cowblocks(mp, NULL); + if (error) { + xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); + return error; + } + + /* Free the per-AG metadata reservation pool. */ + error = xfs_fs_unreserve_ag_blocks(mp); + if (error) { + xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); + return error; + } + + /* + * Before we sync the metadata, we need to free up the reserve + * block pool so that the used block count in the superblock on + * disk is correct at the end of the remount. Stash the current + * reserve pool size so that if we get remounted rw, we can + * return it to the same size. + */ + xfs_save_resvblks(mp); + + xfs_quiesce_attr(mp); + mp->m_flags |= XFS_MOUNT_RDONLY; + + return 0; +} + STATIC int xfs_fs_remount( struct super_block *sb, @@ -1473,37 +1514,9 @@ xfs_fs_remount( /* rw -> ro */ if (!(mp->m_flags & XFS_MOUNT_RDONLY) && (*flags & SB_RDONLY)) { - /* - * Cancel background eofb scanning so it cannot race with the - * final log force+buftarg wait and deadlock the remount. - */ - xfs_stop_block_reaping(mp); - - /* Get rid of any leftover CoW reservations... */ - error = xfs_icache_free_cowblocks(mp, NULL); - if (error) { - xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); - return error; - } - - /* Free the per-AG metadata reservation pool. */ - error = xfs_fs_unreserve_ag_blocks(mp); - if (error) { - xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); + error = xfs_remount_ro(mp); + if (error) return error; - } - - /* - * Before we sync the metadata, we need to free up the reserve - * block pool so that the used block count in the superblock on - * disk is correct at the end of the remount. Stash the current - * reserve pool size so that if we get remounted rw, we can - * return it to the same size. - */ - xfs_save_resvblks(mp); - - xfs_quiesce_attr(mp); - mp->m_flags |= XFS_MOUNT_RDONLY; } return 0;