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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,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 6D39DC43603 for ; Thu, 19 Dec 2019 18:46:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3FF5C24680 for ; Thu, 19 Dec 2019 18:46:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576781200; bh=bUCTHCV4C8NP7zJew3U8XaxWsHStdiHQUK2ftaIvRMw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=UBRTGPys7k7SlIRT0o8hea3Ut45uMBZ9bOKlYDKn2dC9CY0MsVN2JP44uSAI3p3jc cVavBTOqx8JlDxA1BTtBLz5z+WHgNzPPhjsumN84cf2QSXdAEs2pdWBVnSGCdT+XGa ahkEYj6X5DYDJnGAzJ5XRTxKPSu5aJ0vHMHZrESM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729359AbfLSSqj (ORCPT ); Thu, 19 Dec 2019 13:46:39 -0500 Received: from mail.kernel.org ([198.145.29.99]:39226 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729084AbfLSSqc (ORCPT ); Thu, 19 Dec 2019 13:46:32 -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 B81EE222C2; Thu, 19 Dec 2019 18:46:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576781192; bh=bUCTHCV4C8NP7zJew3U8XaxWsHStdiHQUK2ftaIvRMw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=N9VeuPOdwNH8vavm7blOd2gnMEQzvljNB+MSqDuI5NaRoKkPc6iUM7qqp16NEHOnP hVY14Au2kMU7nQaRNTbc89n4N2NtLZROriRDbSbcAKyYh7cn/mjwA9b/Avwz0TKA1U PlaM5gQbsKobkymTuNsT9QTqtYcKvflv4NIvCK9w= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Filipe Manana , Josef Bacik , David Sterba Subject: [PATCH 4.9 119/199] btrfs: record all roots for rename exchange on a subvol Date: Thu, 19 Dec 2019 19:33:21 +0100 Message-Id: <20191219183221.499407062@linuxfoundation.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20191219183214.629503389@linuxfoundation.org> References: <20191219183214.629503389@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Josef Bacik commit 3e1740993e43116b3bc71b0aad1e6872f6ccf341 upstream. Testing with the new fsstress support for subvolumes uncovered a pretty bad problem with rename exchange on subvolumes. We're modifying two different subvolumes, but we only start the transaction on one of them, so the other one is not added to the dirty root list. This is caught by btrfs_cow_block() with a warning because the root has not been updated, however if we do not modify this root again we'll end up pointing at an invalid root because the root item is never updated. Fix this by making sure we add the destination root to the trans list, the same as we do with normal renames. This fixes the corruption. Fixes: cdd1fedf8261 ("btrfs: add support for RENAME_EXCHANGE and RENAME_WHITEOUT") CC: stable@vger.kernel.org # 4.9+ Reviewed-by: Filipe Manana Signed-off-by: Josef Bacik Signed-off-by: David Sterba Signed-off-by: Greg Kroah-Hartman --- fs/btrfs/inode.c | 3 +++ 1 file changed, 3 insertions(+) --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -9616,6 +9616,9 @@ static int btrfs_rename_exchange(struct goto out_notrans; } + if (dest != root) + btrfs_record_root_in_trans(trans, dest); + /* * We need to find a free sequence number both in the source and * in the destination directory for the exchange.