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=-12.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,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 9BD8FC2D0E4 for ; Tue, 17 Nov 2020 13:11:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4BB66221EB for ; Tue, 17 Nov 2020 13:11:05 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="dgLS7aLT" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729123AbgKQNKe (ORCPT ); Tue, 17 Nov 2020 08:10:34 -0500 Received: from mail.kernel.org ([198.145.29.99]:39392 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729449AbgKQNKS (ORCPT ); Tue, 17 Nov 2020 08:10:18 -0500 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (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 70204221EB; Tue, 17 Nov 2020 13:10:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1605618618; bh=3b3JxQjWWLIMKkDFKWe9usMFORfS/9n5zVzlUkIyvkI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dgLS7aLTgOxkg1QeD7uDG3ujorVRbGoBLSFgp6lDNulaFCrMt/gRZ4lq+4K9dEHhC wvd9weIllPK27WRGME5IdPbPyyDaeTOgXxcuCXSxMmw+QAL0JLpK8I1bxxnbTwzWtF DWf8JL485LOU0NoK+BzgfEAqfwWtwDB+7wx2bT4w= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Bob Peterson , Andreas Gruenbacher , Sasha Levin Subject: [PATCH 4.9 28/78] gfs2: check for live vs. read-only file system in gfs2_fitrim Date: Tue, 17 Nov 2020 14:04:54 +0100 Message-Id: <20201117122110.482615481@linuxfoundation.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201117122109.116890262@linuxfoundation.org> References: <20201117122109.116890262@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Bob Peterson [ Upstream commit c5c68724696e7d2f8db58a5fce3673208d35c485 ] Before this patch, gfs2_fitrim was not properly checking for a "live" file system. If the file system had something to trim and the file system was read-only (or spectator) it would start the trim, but when it starts the transaction, gfs2_trans_begin returns -EROFS (read-only file system) and it errors out. However, if the file system was already trimmed so there's no work to do, it never called gfs2_trans_begin. That code is bypassed so it never returns the error. Instead, it returns a good return code with 0 work. All this makes for inconsistent behavior: The same fstrim command can return -EROFS in one case and 0 in another. This tripped up xfstests generic/537 which reports the error as: +fstrim with unrecovered metadata just ate your filesystem This patch adds a check for a "live" (iow, active journal, iow, RW) file system, and if not, returns the error properly. Signed-off-by: Bob Peterson Signed-off-by: Andreas Gruenbacher Signed-off-by: Sasha Levin --- fs/gfs2/rgrp.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c index 0958f76ada6a3..9621badb95995 100644 --- a/fs/gfs2/rgrp.c +++ b/fs/gfs2/rgrp.c @@ -1371,6 +1371,9 @@ int gfs2_fitrim(struct file *filp, void __user *argp) if (!capable(CAP_SYS_ADMIN)) return -EPERM; + if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) + return -EROFS; + if (!blk_queue_discard(q)) return -EOPNOTSUPP; -- 2.27.0