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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 75A0BC433F5 for ; Mon, 24 Jan 2022 18:51:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343629AbiAXSvM (ORCPT ); Mon, 24 Jan 2022 13:51:12 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42670 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245603AbiAXSuQ (ORCPT ); Mon, 24 Jan 2022 13:50:16 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8E6B8C06177F; Mon, 24 Jan 2022 10:50:07 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 57ED9B81223; Mon, 24 Jan 2022 18:50:06 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8F3FFC340E5; Mon, 24 Jan 2022 18:50:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1643050205; bh=G+qescP4ZkOlDYSWHuyWyHuhkYEpB4EQDZFd4VMvkEI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=khCj/zUQvP5pizOfa+KKkseY8kWzk1J2D/y8byD5kf1WRuMT3sR0wsdcdnZXjcuEc isp4NC4sSl65VrL8+YLNbbJ2i83R0NPT9UVCXc8lm319ZGaGjhY95uQkTklos9aIY8 Au4bxTq6xEVZ9NUF9JCpTjQC5UcW8muL/1MkX6tE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Lukas Czerner , Jan Kara , Theodore Tso , Sasha Levin Subject: [PATCH 4.4 042/114] ext4: avoid trim error on fs with small groups Date: Mon, 24 Jan 2022 19:42:17 +0100 Message-Id: <20220124183928.406825806@linuxfoundation.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220124183927.095545464@linuxfoundation.org> References: <20220124183927.095545464@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: stable@vger.kernel.org From: Jan Kara [ Upstream commit 173b6e383d2a204c9921ffc1eca3b87aa2106c33 ] A user reported FITRIM ioctl failing for him on ext4 on some devices without apparent reason. After some debugging we've found out that these devices (being LVM volumes) report rather large discard granularity of 42MB and the filesystem had 1k blocksize and thus group size of 8MB. Because ext4 FITRIM implementation puts discard granularity into minlen, ext4_trim_fs() declared the trim request as invalid. However just silently doing nothing seems to be a more appropriate reaction to such combination of parameters since user did not specify anything wrong. CC: Lukas Czerner Fixes: 5c2ed62fd447 ("ext4: Adjust minlen with discard_granularity in the FITRIM ioctl") Signed-off-by: Jan Kara Link: https://lore.kernel.org/r/20211112152202.26614-1-jack@suse.cz Signed-off-by: Theodore Ts'o Signed-off-by: Sasha Levin --- fs/ext4/ioctl.c | 2 -- fs/ext4/mballoc.c | 8 ++++++++ 2 files changed, 8 insertions(+), 2 deletions(-) diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c index 84f8d07302efa..a224d6efb5a6d 100644 --- a/fs/ext4/ioctl.c +++ b/fs/ext4/ioctl.c @@ -610,8 +610,6 @@ resizefs_out: sizeof(range))) return -EFAULT; - range.minlen = max((unsigned int)range.minlen, - q->limits.discard_granularity); ret = ext4_trim_fs(sb, &range); if (ret < 0) return ret; diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index ac87f7e5d6a4f..c7be47ed71144 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -5223,6 +5223,7 @@ out: */ int ext4_trim_fs(struct super_block *sb, struct fstrim_range *range) { + struct request_queue *q = bdev_get_queue(sb->s_bdev); struct ext4_group_info *grp; ext4_group_t group, first_group, last_group; ext4_grpblk_t cnt = 0, first_cluster, last_cluster; @@ -5241,6 +5242,13 @@ int ext4_trim_fs(struct super_block *sb, struct fstrim_range *range) start >= max_blks || range->len < sb->s_blocksize) return -EINVAL; + /* No point to try to trim less than discard granularity */ + if (range->minlen < q->limits.discard_granularity) { + minlen = EXT4_NUM_B2C(EXT4_SB(sb), + q->limits.discard_granularity >> sb->s_blocksize_bits); + if (minlen > EXT4_CLUSTERS_PER_GROUP(sb)) + goto out; + } if (end >= max_blks) end = max_blks - 1; if (end <= first_data_blk) -- 2.34.1