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=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 3230FC282C8 for ; Mon, 28 Jan 2019 15:57:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F3A1921848 for ; Mon, 28 Jan 2019 15:57:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548691075; bh=x0Voxxt2c4FEzIU0HzbiZbOM/xj6TU5jF5ovg+pUO0g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=eLD9i7kpjYRHhuZC6sHxvteUi6en01VbfhZlCFHpv7XcMIMRaJBUv58+kC815HGHT IsoIi82zSW/ZCP8BK0YelehVYa/MxgYTRJ2uFOvNg0oDs+V+r8p92qiVY/RDggfes1 dL7z2v73MqCc6SvsCN8ILObeOh+oC9PnegKTWY0s= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730310AbfA1P5x (ORCPT ); Mon, 28 Jan 2019 10:57:53 -0500 Received: from mail.kernel.org ([198.145.29.99]:43282 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729597AbfA1P5v (ORCPT ); Mon, 28 Jan 2019 10:57:51 -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 697E42183F; Mon, 28 Jan 2019 15:57:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1548691070; bh=x0Voxxt2c4FEzIU0HzbiZbOM/xj6TU5jF5ovg+pUO0g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bLCfLNYfVx30cAApNOhApHWXHj9HxgbvJ3TdhHSrqlDD0mf5tMNn5QD2hx4yfIVXR IVcyBqo6kQ6HAAZVTu2QogdYJ/53kxUgNzbJk3xgg0H26NavxncJgTqt8mbjxcE2nP QsbHJZ5S/ZdL8nbLODoxFSAhiWI6BwXUCr6+AJyA= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Junxiao Bi , Joel Becker , Joseph Qi , Jun Piao , Mark Fasheh , Andrew Morton , Linus Torvalds , Sasha Levin Subject: [PATCH AUTOSEL 4.20 279/304] ocfs2: don't clear bh uptodate for block read Date: Mon, 28 Jan 2019 10:43:16 -0500 Message-Id: <20190128154341.47195-279-sashal@kernel.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20190128154341.47195-1-sashal@kernel.org> References: <20190128154341.47195-1-sashal@kernel.org> MIME-Version: 1.0 X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Junxiao Bi [ Upstream commit 70306d9dce75abde855cefaf32b3f71eed8602a3 ] For sync io read in ocfs2_read_blocks_sync(), first clear bh uptodate flag and submit the io, second wait io done, last check whether bh uptodate, if not return io error. If two sync io for the same bh were issued, it could be the first io done and set uptodate flag, but just before check that flag, the second io came in and cleared uptodate, then ocfs2_read_blocks_sync() for the first io will return IO error. Indeed it's not necessary to clear uptodate flag, as the io end handler end_buffer_read_sync() will set or clear it based on io succeed or failed. The following message was found from a nfs server but the underlying storage returned no error. [4106438.567376] (nfsd,7146,3):ocfs2_get_suballoc_slot_bit:2780 ERROR: read block 1238823695 failed -5 [4106438.567569] (nfsd,7146,3):ocfs2_get_suballoc_slot_bit:2812 ERROR: status = -5 [4106438.567611] (nfsd,7146,3):ocfs2_test_inode_bit:2894 ERROR: get alloc slot and bit failed -5 [4106438.567643] (nfsd,7146,3):ocfs2_test_inode_bit:2932 ERROR: status = -5 [4106438.567675] (nfsd,7146,3):ocfs2_get_dentry:94 ERROR: test inode bit failed -5 Same issue in non sync read ocfs2_read_blocks(), fixed it as well. Link: http://lkml.kernel.org/r/20181121020023.3034-4-junxiao.bi@oracle.com Signed-off-by: Junxiao Bi Reviewed-by: Changwei Ge Reviewed-by: Yiwen Jiang Cc: Joel Becker Cc: Joseph Qi Cc: Jun Piao Cc: Mark Fasheh Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Signed-off-by: Sasha Levin --- fs/ocfs2/buffer_head_io.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/fs/ocfs2/buffer_head_io.c b/fs/ocfs2/buffer_head_io.c index 4ebbd57cbf84..f9b84f7a3e4b 100644 --- a/fs/ocfs2/buffer_head_io.c +++ b/fs/ocfs2/buffer_head_io.c @@ -161,7 +161,6 @@ int ocfs2_read_blocks_sync(struct ocfs2_super *osb, u64 block, #endif } - clear_buffer_uptodate(bh); get_bh(bh); /* for end_buffer_read_sync() */ bh->b_end_io = end_buffer_read_sync; submit_bh(REQ_OP_READ, 0, bh); @@ -341,7 +340,6 @@ int ocfs2_read_blocks(struct ocfs2_caching_info *ci, u64 block, int nr, continue; } - clear_buffer_uptodate(bh); get_bh(bh); /* for end_buffer_read_sync() */ if (validate) set_buffer_needs_validate(bh); -- 2.19.1