From patchwork Sat Dec 16 13:46:55 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff Layton X-Patchwork-Id: 10116995 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 40E38603B5 for ; Sat, 16 Dec 2017 13:47:57 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 32D9A2951F for ; Sat, 16 Dec 2017 13:47:57 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 27ABD29DFC; Sat, 16 Dec 2017 13:47:57 +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=unavailable 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 E39F92951F for ; Sat, 16 Dec 2017 13:47:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757099AbdLPNrs (ORCPT ); Sat, 16 Dec 2017 08:47:48 -0500 Received: from mail.kernel.org ([198.145.29.99]:42522 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757079AbdLPNrn (ORCPT ); Sat, 16 Dec 2017 08:47:43 -0500 Received: from tleilax.poochiereds.net (cpe-71-70-156-158.nc.res.rr.com [71.70.156.158]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D5D3721A1C; Sat, 16 Dec 2017 13:47:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D5D3721A1C Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=jlayton@kernel.org From: Jeff Layton To: linux-fsdevel@vger.kernel.org Cc: linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk, linux-nfs@vger.kernel.org, bfields@fieldses.org, neilb@suse.de, jack@suse.de, linux-ext4@vger.kernel.org, tytso@mit.edu, adilger.kernel@dilger.ca, linux-xfs@vger.kernel.org, darrick.wong@oracle.com, david@fromorbit.com, linux-btrfs@vger.kernel.org, clm@fb.com, jbacik@fb.com, dsterba@suse.com, linux-integrity@vger.kernel.org, zohar@linux.vnet.ibm.com, dmitry.kasatkin@gmail.com, linux-afs@lists.infradead.org, dhowells@redhat.com Subject: [PATCH v2 18/19] btrfs: only dirty the inode in btrfs_update_time if something was changed Date: Sat, 16 Dec 2017 08:46:55 -0500 Message-Id: <20171216134656.15561-19-jlayton@kernel.org> X-Mailer: git-send-email 2.14.3 In-Reply-To: <20171216134656.15561-1-jlayton@kernel.org> References: <20171216134656.15561-1-jlayton@kernel.org> Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Jeff Layton At this point, we know that "now" and the file times may differ, and we suspect that the i_version has been flagged to be bumped. Attempt to bump the i_version, and only mark the inode dirty if that actually occurred or if one of the times was updated. Signed-off-by: Jeff Layton --- fs/btrfs/inode.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 1dfa299a31a9..5d1956ad6d39 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -6106,19 +6106,20 @@ static int btrfs_update_time(struct inode *inode, struct timespec *now, int flags) { struct btrfs_root *root = BTRFS_I(inode)->root; + bool dirty = flags & ~S_VERSION; if (btrfs_root_readonly(root)) return -EROFS; if (flags & S_VERSION) - inode_inc_iversion(inode); + dirty |= inode_maybe_inc_iversion(inode, dirty); if (flags & S_CTIME) inode->i_ctime = *now; if (flags & S_MTIME) inode->i_mtime = *now; if (flags & S_ATIME) inode->i_atime = *now; - return btrfs_dirty_inode(inode); + return dirty ? btrfs_dirty_inode(inode) : 0; } /*