From patchwork Thu Feb 27 13:37:07 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 230173 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=-11.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=unavailable 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 55E4DC11D3D for ; Thu, 27 Feb 2020 14:41:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 286CC24691 for ; Thu, 27 Feb 2020 14:41:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582814490; bh=x3AlGq53+s3MUKR4bQa59r6yc1MrhmZ2wwh474+RZ8w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=saM4a0Iei1iCPN65fXMI3qzPs7pm018+eipNCpNfTCxVj1c29clUHvdj52jCuB3Jo b6ApSBD8wrWBlpRdS33P27ZMiTknmjw5K0EhoEgQ3hVzXAX1Lo/bmOTEAl7aIWBqOf GVB2olVLQLV+A4+M9SZWIdLiGB/xkVqM9R+kCUi0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731733AbgB0OlZ (ORCPT ); Thu, 27 Feb 2020 09:41:25 -0500 Received: from mail.kernel.org ([198.145.29.99]:50680 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730922AbgB0Nvc (ORCPT ); Thu, 27 Feb 2020 08:51:32 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (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 A69C620801; Thu, 27 Feb 2020 13:51:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582811492; bh=x3AlGq53+s3MUKR4bQa59r6yc1MrhmZ2wwh474+RZ8w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XiLqJkWaXPnswp4ZrbPF1yRLshNlXGALle8DnR6Vfk2R3Q93KQm07M+ZMn9p0wO42 5PFqU7Hsq+qljVoMz8QmPP1k2WVbX7uTyQuE/2/RdDFfH0S3M1j0dYLKcDLG7NKzig kyIkoXTq26IyBFiIPOfyg78lmWwDUj/NJcOY5EO4= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Qu Wenruo , Josef Bacik , Filipe Manana , David Sterba Subject: [PATCH 4.9 153/165] Btrfs: fix btrfs_wait_ordered_range() so that it waits for all ordered extents Date: Thu, 27 Feb 2020 14:37:07 +0100 Message-Id: <20200227132253.043548520@linuxfoundation.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200227132230.840899170@linuxfoundation.org> References: <20200227132230.840899170@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Filipe Manana commit e75fd33b3f744f644061a4f9662bd63f5434f806 upstream. In btrfs_wait_ordered_range() once we find an ordered extent that has finished with an error we exit the loop and don't wait for any other ordered extents that might be still in progress. All the users of btrfs_wait_ordered_range() expect that there are no more ordered extents in progress after that function returns. So past fixes such like the ones from the two following commits: ff612ba7849964 ("btrfs: fix panic during relocation after ENOSPC before writeback happens") 28aeeac1dd3080 ("Btrfs: fix panic when starting bg cache writeout after IO error") don't work when there are multiple ordered extents in the range. Fix that by making btrfs_wait_ordered_range() wait for all ordered extents even after it finds one that had an error. Link: https://github.com/kdave/btrfs-progs/issues/228#issuecomment-569777554 CC: stable@vger.kernel.org # 4.4+ Reviewed-by: Qu Wenruo Reviewed-by: Josef Bacik Signed-off-by: Filipe Manana Signed-off-by: David Sterba Signed-off-by: Greg Kroah-Hartman --- fs/btrfs/ordered-data.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) --- a/fs/btrfs/ordered-data.c +++ b/fs/btrfs/ordered-data.c @@ -837,10 +837,15 @@ int btrfs_wait_ordered_range(struct inod } btrfs_start_ordered_extent(inode, ordered, 1); end = ordered->file_offset; + /* + * If the ordered extent had an error save the error but don't + * exit without waiting first for all other ordered extents in + * the range to complete. + */ if (test_bit(BTRFS_ORDERED_IOERR, &ordered->flags)) ret = -EIO; btrfs_put_ordered_extent(ordered); - if (ret || end == 0 || end == start) + if (end == 0 || end == start) break; end--; }