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=-16.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 503DCC433E0 for ; Sat, 9 Jan 2021 08:00:38 +0000 (UTC) Received: from lists.sourceforge.net (lists.sourceforge.net [216.105.38.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 177EE238E8; Sat, 9 Jan 2021 08:00:38 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 177EE238E8 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linux-f2fs-devel-bounces@lists.sourceforge.net Received: from [127.0.0.1] (helo=sfs-ml-4.v29.lw.sourceforge.com) by sfs-ml-4.v29.lw.sourceforge.com with esmtp (Exim 4.90_1) (envelope-from ) id 1ky9Ar-0004Gw-55; Sat, 09 Jan 2021 08:00:37 +0000 Received: from [172.30.20.202] (helo=mx.sourceforge.net) by sfs-ml-4.v29.lw.sourceforge.com with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ky9Aj-0004Ez-9M for linux-f2fs-devel@lists.sourceforge.net; Sat, 09 Jan 2021 08:00:29 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sourceforge.net; s=x; h=Content-Transfer-Encoding:MIME-Version:References: In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=t47piFyuKgUsbOQZSZCZIhQxetm+8p12GP1zCLQtkNc=; b=jM+iVYHspC493ghDlXip7WJGup 8AczMea/g2+vmjlk2TZ8iEhknIpBuUIsu4tHMnSDqavbe390P36Mi609oWsB4zLRH1mzNWttzkbYo 4uMlt4usob4fWYYEZv8SEJGBmWTnvTP7WIRsq6c6pscOJRmBOkBDu21vIhjjIG220hIc=; DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sf.net; s=x ; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=t47piFyuKgUsbOQZSZCZIhQxetm+8p12GP1zCLQtkNc=; b=QH0PLIrY60V2idrQmro9kAvinY qt8r6MrMW5JnRgwmK91WUOxnx8DVZkdCoCwFtBZLcjxTRRSM+p0QFMObSh3vOisk5K1il/uQ2qsFU nz0cmUDlt6QimYoLtgWbChXBZCJm4Vtwsoo66sPTtJEv7t4AbBead2xGgymQ6IPnDdfc=; Received: from mail.kernel.org ([198.145.29.99]) by sfi-mx-3.v28.lw.sourceforge.com with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.92.2) id 1ky9AW-00DnF1-EO for linux-f2fs-devel@lists.sourceforge.net; Sat, 09 Jan 2021 08:00:24 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id EEF0923A75; Sat, 9 Jan 2021 07:59:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1610179186; bh=f1IRzjNhqEyjuW1h5W+eMv7y7CvKJNHHEP0p7XPwbsA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=uo/6gdoDMggzj6Fc6Jq6RuNZvTc6ZXoyueSBp6hIBATRV5BZCKOQ+IuTezLoA0r/9 8Puye+GnhKa8dVphMklQFYbjGq5a6WgBwkFXeRA35B/Xh7wKSmfeAqiLV6H9oa6PXw H3Mb3X55rrhnI5XRM179thaocF2KHgRVpqWo6GjV+EMDsupqE2u4QLv6AYHiVcy5he 3u0SR66vXtRSGCIUDYLq2478Oq9ioXVv2ko3ELDBIm/nP5zCf986jobvQO6yWOMJ5g eYikzMpeWlKocfbpVKHMrw2NotkC3BsjO+UiuOKslb2jsostmIB+ps+vtqNEZfRgTt Sxa79yr1KZXTg== From: Eric Biggers To: linux-fsdevel@vger.kernel.org Date: Fri, 8 Jan 2021 23:58:58 -0800 Message-Id: <20210109075903.208222-8-ebiggers@kernel.org> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210109075903.208222-1-ebiggers@kernel.org> References: <20210109075903.208222-1-ebiggers@kernel.org> MIME-Version: 1.0 X-Headers-End: 1ky9AW-00DnF1-EO Subject: [f2fs-dev] [PATCH v2 07/12] fs: clean up __mark_inode_dirty() a bit X-BeenThere: linux-f2fs-devel@lists.sourceforge.net X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-xfs@vger.kernel.org, linux-ext4@vger.kernel.org, Theodore Ts'o , Christoph Hellwig , linux-f2fs-devel@lists.sourceforge.net Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-f2fs-devel-bounces@lists.sourceforge.net From: Eric Biggers Improve some comments, and don't bother checking for the I_DIRTY_TIME flag in the case where we just cleared it. Also, warn if I_DIRTY_TIME and I_DIRTY_PAGES are passed to __mark_inode_dirty() at the same time, as this case isn't handled. Reviewed-by: Christoph Hellwig Signed-off-by: Eric Biggers --- fs/fs-writeback.c | 49 +++++++++++++++++++++++++++++------------------ 1 file changed, 30 insertions(+), 19 deletions(-) diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c index 2e6064012f7d3..80ee9816d9df5 100644 --- a/fs/fs-writeback.c +++ b/fs/fs-writeback.c @@ -2219,23 +2219,24 @@ static noinline void block_dump___mark_inode_dirty(struct inode *inode) } /** - * __mark_inode_dirty - internal function + * __mark_inode_dirty - internal function to mark an inode dirty * * @inode: inode to mark - * @flags: what kind of dirty (i.e. I_DIRTY_SYNC) + * @flags: what kind of dirty, e.g. I_DIRTY_SYNC. This can be a combination of + * multiple I_DIRTY_* flags, except that I_DIRTY_TIME can't be combined + * with I_DIRTY_PAGES. * - * Mark an inode as dirty. Callers should use mark_inode_dirty or - * mark_inode_dirty_sync. + * Mark an inode as dirty. We notify the filesystem, then update the inode's + * dirty flags. Then, if needed we add the inode to the appropriate dirty list. * - * Put the inode on the super block's dirty list. + * Most callers should use mark_inode_dirty() or mark_inode_dirty_sync() + * instead of calling this directly. * - * CAREFUL! We mark it dirty unconditionally, but move it onto the - * dirty list only if it is hashed or if it refers to a blockdev. - * If it was not hashed, it will never be added to the dirty list - * even if it is later hashed, as it will have been marked dirty already. + * CAREFUL! We only add the inode to the dirty list if it is hashed or if it + * refers to a blockdev. Unhashed inodes will never be added to the dirty list + * even if they are later hashed, as they will have been marked dirty already. * - * In short, make sure you hash any inodes _before_ you start marking - * them dirty. + * In short, ensure you hash any inodes _before_ you start marking them dirty. * * Note that for blockdevs, inode->dirtied_when represents the dirtying time of * the block-special inode (/dev/hda1) itself. And the ->dirtied_when field of @@ -2247,25 +2248,34 @@ static noinline void block_dump___mark_inode_dirty(struct inode *inode) void __mark_inode_dirty(struct inode *inode, int flags) { struct super_block *sb = inode->i_sb; - int dirtytime; + int dirtytime = 0; trace_writeback_mark_inode_dirty(inode, flags); - /* - * Don't do this for I_DIRTY_PAGES - that doesn't actually - * dirty the inode itself - */ if (flags & I_DIRTY_INODE) { + /* + * Notify the filesystem about the inode being dirtied, so that + * (if needed) it can update on-disk fields and journal the + * inode. This is only needed when the inode itself is being + * dirtied now. I.e. it's only needed for I_DIRTY_INODE, not + * for just I_DIRTY_PAGES or I_DIRTY_TIME. + */ trace_writeback_dirty_inode_start(inode, flags); - if (sb->s_op->dirty_inode) sb->s_op->dirty_inode(inode, flags & I_DIRTY_INODE); - trace_writeback_dirty_inode(inode, flags); + /* I_DIRTY_INODE supersedes I_DIRTY_TIME. */ flags &= ~I_DIRTY_TIME; + } else { + /* + * Else it's either I_DIRTY_PAGES, I_DIRTY_TIME, or nothing. + * (We don't support setting both I_DIRTY_PAGES and I_DIRTY_TIME + * in one call to __mark_inode_dirty().) + */ + dirtytime = flags & I_DIRTY_TIME; + WARN_ON_ONCE(dirtytime && flags != I_DIRTY_TIME); } - dirtytime = flags & I_DIRTY_TIME; /* * Paired with smp_mb() in __writeback_single_inode() for the @@ -2288,6 +2298,7 @@ void __mark_inode_dirty(struct inode *inode, int flags) inode_attach_wb(inode, NULL); + /* I_DIRTY_INODE supersedes I_DIRTY_TIME. */ if (flags & I_DIRTY_INODE) inode->i_state &= ~I_DIRTY_TIME; inode->i_state |= flags; -- 2.30.0 _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel