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=-13.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,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 266D0C71156 for ; Tue, 17 Nov 2020 12:59:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D79082225E for ; Tue, 17 Nov 2020 12:59:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="TZYPSntk" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728712AbgKQM72 (ORCPT ); Tue, 17 Nov 2020 07:59:28 -0500 Received: from mail.kernel.org ([198.145.29.99]:54226 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728601AbgKQM5V (ORCPT ); Tue, 17 Nov 2020 07:57:21 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id CD87C24695; Tue, 17 Nov 2020 12:57:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1605617840; bh=dPyFk8BTQ9ZWKFDCA6KL93rnYZxnoBEdm02hE+tuejY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=TZYPSntkn8N67aOIadY8CfMrI7OFkMXC15ExU4YCJL2jSr66gAJOs8PPxhvQvG3Ir KpWPDlXNT3fIXPcsfzz8HSQ8LU3F26M19VTHiZrhDZ8+Xt2I7pQJVQWvAkq/KaZtag 23FCyhvpTkrovO9pFb7u0yt2tfnVIYP7BVZ2GCIo= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Bob Peterson , Andreas Gruenbacher , Sasha Levin , cluster-devel@redhat.com Subject: [PATCH AUTOSEL 5.9 18/21] gfs2: Fix case in which ail writes are done to jdata holes Date: Tue, 17 Nov 2020 07:56:49 -0500 Message-Id: <20201117125652.599614-18-sashal@kernel.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20201117125652.599614-1-sashal@kernel.org> References: <20201117125652.599614-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Bob Peterson [ Upstream commit 4e79e3f08e576acd51dffb4520037188703238b3 ] Patch b2a846dbef4e ("gfs2: Ignore journal log writes for jdata holes") tried (unsuccessfully) to fix a case in which writes were done to jdata blocks, the blocks are sent to the ail list, then a punch_hole or truncate operation caused the blocks to be freed. In other words, the ail items are for jdata holes. Before b2a846dbef4e, the jdata hole caused function gfs2_block_map to return -EIO, which was eventually interpreted as an IO error to the journal, and then withdraw. This patch changes function gfs2_get_block_noalloc, which is only used for jdata writes, so it returns -ENODATA rather than -EIO, and when -ENODATA is returned to gfs2_ail1_start_one, the error is ignored. We can safely ignore it because gfs2_ail1_start_one is only called when the jdata pages have already been written and truncated, so the ail1 content no longer applies. Signed-off-by: Bob Peterson Signed-off-by: Andreas Gruenbacher Signed-off-by: Sasha Levin --- fs/gfs2/aops.c | 2 +- fs/gfs2/log.c | 2 ++ 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c index d4af283fc8886..317a47d49442b 100644 --- a/fs/gfs2/aops.c +++ b/fs/gfs2/aops.c @@ -77,7 +77,7 @@ static int gfs2_get_block_noalloc(struct inode *inode, sector_t lblock, if (error) return error; if (!buffer_mapped(bh_result)) - return -EIO; + return -ENODATA; return 0; } diff --git a/fs/gfs2/log.c b/fs/gfs2/log.c index 93032feb51599..1ceeec0ffb16c 100644 --- a/fs/gfs2/log.c +++ b/fs/gfs2/log.c @@ -132,6 +132,8 @@ __acquires(&sdp->sd_ail_lock) spin_unlock(&sdp->sd_ail_lock); ret = generic_writepages(mapping, wbc); spin_lock(&sdp->sd_ail_lock); + if (ret == -ENODATA) /* if a jdata write into a new hole */ + ret = 0; /* ignore it */ if (ret || wbc->nr_to_write <= 0) break; return -EBUSY; -- 2.27.0