From patchwork Fri Jun 16 19:34:21 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff Layton X-Patchwork-Id: 9793607 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 E66F760325 for ; Fri, 16 Jun 2017 19:37:47 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D65B7285D1 for ; Fri, 16 Jun 2017 19:37:47 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CB0092863A; Fri, 16 Jun 2017 19:37:47 +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 8461D285D1 for ; Fri, 16 Jun 2017 19:37:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752592AbdFPTgE (ORCPT ); Fri, 16 Jun 2017 15:36:04 -0400 Received: from mx1.redhat.com ([209.132.183.28]:41146 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752516AbdFPTgB (ORCPT ); Fri, 16 Jun 2017 15:36:01 -0400 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 5636780482; Fri, 16 Jun 2017 19:35:55 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 5636780482 Authentication-Results: ext-mx04.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx04.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=jlayton@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 5636780482 Received: from tleilax.poochiereds.net (ovpn-120-225.rdu2.redhat.com [10.10.120.225]) by smtp.corp.redhat.com (Postfix) with ESMTP id 72810173B1; Fri, 16 Jun 2017 19:35:51 +0000 (UTC) From: Jeff Layton To: Andrew Morton , Al Viro , Jan Kara , tytso@mit.edu, axboe@kernel.dk, mawilcox@microsoft.com, ross.zwisler@linux.intel.com, corbet@lwn.net, Chris Mason , Josef Bacik , David Sterba , "Darrick J . Wong" Cc: Carlos Maiolino , Eryu Guan , David Howells , Christoph Hellwig , linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-block@vger.kernel.org Subject: [PATCH v7 16/22] block: convert to errseq_t based writeback error tracking Date: Fri, 16 Jun 2017 15:34:21 -0400 Message-Id: <20170616193427.13955-17-jlayton@redhat.com> In-Reply-To: <20170616193427.13955-1-jlayton@redhat.com> References: <20170616193427.13955-1-jlayton@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Fri, 16 Jun 2017 19:35:55 +0000 (UTC) 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 This is a very minimal conversion to errseq_t based error tracking for raw block device access. Only real change that is strictly required is that we must unconditionally call filemap_report_wb_err in blkdev_fsync. That ensures that the file's errseq_t is always advanced to the latest value in the mapping. Note that there are internal callers that call sync_blockdev and the like that are not affected by this. They'll continue to use the AS_EIO/AS_ENOSPC flags for error reporting like they always have for now. Signed-off-by: Jeff Layton --- fs/block_dev.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/fs/block_dev.c b/fs/block_dev.c index dc839f8f0ba5..9e8e13b097ef 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -625,11 +625,11 @@ int blkdev_fsync(struct file *filp, loff_t start, loff_t end, int datasync) { struct inode *bd_inode = bdev_file_inode(filp); struct block_device *bdev = I_BDEV(bd_inode); - int error; + int error, wberr; error = filemap_write_and_wait_range(filp->f_mapping, start, end); if (error) - return error; + goto out; /* * There is no need to serialise calls to blkdev_issue_flush with @@ -640,6 +640,10 @@ int blkdev_fsync(struct file *filp, loff_t start, loff_t end, int datasync) if (error == -EOPNOTSUPP) error = 0; +out: + wberr = filemap_report_wb_err(filp); + if (!error) + error = wberr; return error; } EXPORT_SYMBOL(blkdev_fsync);