From patchwork Thu Apr 16 13:23:31 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 227884 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,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 E58B0C2BB55 for ; Thu, 16 Apr 2020 13:38:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B7170221F7 for ; Thu, 16 Apr 2020 13:38:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587044325; bh=ZlFdhpBTO9U41EWXRCCid5BnZgyzC6sNTdyFY5aPz4s=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=tdoaMGLVD7fadiWUiZL2vTjwka6GtLhP3KZeQGKFKTdCbqhdzzRTlC/Rb/fQfTeTV pphnU41qnWHIOUKTTnTIFKSLoUOEDaRf8klkApOJFrtpsBFfIKge3D29B4YEn1Ti8x Tf50aUueKX+OlvN9d28BzspRerb4qdjq47dWVbfw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2897735AbgDPNim (ORCPT ); Thu, 16 Apr 2020 09:38:42 -0400 Received: from mail.kernel.org ([198.145.29.99]:51010 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2897704AbgDPNie (ORCPT ); Thu, 16 Apr 2020 09:38:34 -0400 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 49380221F4; Thu, 16 Apr 2020 13:38:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587044313; bh=ZlFdhpBTO9U41EWXRCCid5BnZgyzC6sNTdyFY5aPz4s=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=TNchaN3QyuOQfCQ5Z9xgTGMb1neZ/KeyJ79IX/rzQ4MgeZHbSDTGH+0E/I0IiVxKG Talgwvxq3530NHK/mOH504TMajdSp9kXuwMKFBW6G1JQZk2PyO+aOtM5+V9b2YQr3/ aDQy3NN9HRkjI+xS52qC7hJu1DD4O6Dr82KPS0ys= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Josef Bacik , David Sterba Subject: [PATCH 5.5 160/257] btrfs: reloc: clean dirty subvols if we fail to start a transaction Date: Thu, 16 Apr 2020 15:23:31 +0200 Message-Id: <20200416131346.581418690@linuxfoundation.org> X-Mailer: git-send-email 2.26.1 In-Reply-To: <20200416131325.891903893@linuxfoundation.org> References: <20200416131325.891903893@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: Josef Bacik commit 6217b0fadd4473a16fabc6aecd7527a9f71af534 upstream. If we do merge_reloc_roots() we could insert a few roots onto the dirty subvol roots list, where we hold a ref on them. If we fail to start the transaction we need to run clean_dirty_subvols() in order to cleanup the refs. CC: stable@vger.kernel.org # 5.4+ Signed-off-by: Josef Bacik Reviewed-by: David Sterba Signed-off-by: David Sterba Signed-off-by: Greg Kroah-Hartman --- fs/btrfs/relocation.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) --- a/fs/btrfs/relocation.c +++ b/fs/btrfs/relocation.c @@ -4221,10 +4221,10 @@ restart: goto out_free; } btrfs_commit_transaction(trans); +out_free: ret = clean_dirty_subvols(rc); if (ret < 0 && !err) err = ret; -out_free: btrfs_free_block_rsv(fs_info, rc->block_rsv); btrfs_free_path(path); return err; @@ -4622,10 +4622,10 @@ int btrfs_recover_relocation(struct btrf trans = btrfs_join_transaction(rc->extent_root); if (IS_ERR(trans)) { err = PTR_ERR(trans); - goto out_free; + goto out_clean; } err = btrfs_commit_transaction(trans); - +out_clean: ret = clean_dirty_subvols(rc); if (ret < 0 && !err) err = ret;