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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 407E3C43603 for ; Wed, 11 Dec 2019 15:30:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1173B22B48 for ; Wed, 11 Dec 2019 15:30:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576078253; bh=FD+yAWf7DdVp37fOeN6SheKubiE2hRXA+it56OtqirY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=XPepvkrHVamUFuW9NZESw8dJ1POqel2LZfQx7HhhhHcZLm6ssvleVwnYRlQpLo8Zu f1MRzjGj9NR9V2IztPDFOfUsvjsRiWrBggPVbGkKzlkB57FbrH8ROWDd8VbW3ax3LN sD9Dwg0abDfbosSsn9CciGDYPc7bc1JmZAp89iAc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387990AbfLKPav (ORCPT ); Wed, 11 Dec 2019 10:30:51 -0500 Received: from mail.kernel.org ([198.145.29.99]:36238 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387869AbfLKP3Y (ORCPT ); Wed, 11 Dec 2019 10:29:24 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 07918208C3; Wed, 11 Dec 2019 15:29:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576078163; bh=FD+yAWf7DdVp37fOeN6SheKubiE2hRXA+it56OtqirY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=o9Wo8/u2eoroI4ylswqm4q70UaSd487V5O2uJ1AM0ZZ2FQMghaTj405rUcdghe3Pc WhANEmSLiaC+xnwb9AjEHXOYg1s0VLyqWkeD0YtOxI/t9qV0BfX52dHHLD1rEN3/2X NPl0E/U/iHW7MGp+Uy9nHwAYrvkOICBaoz+fxO8o= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Chengguang Xu , Chao Yu , Jaegeuk Kim , Sasha Levin , linux-f2fs-devel@lists.sourceforge.net Subject: [PATCH AUTOSEL 4.14 48/58] f2fs: choose hardlimit when softlimit is larger than hardlimit in f2fs_statfs_project() Date: Wed, 11 Dec 2019 10:28:21 -0500 Message-Id: <20191211152831.23507-48-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191211152831.23507-1-sashal@kernel.org> References: <20191211152831.23507-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Chengguang Xu [ Upstream commit 909110c060f22e65756659ec6fa957ae75777e00 ] Setting softlimit larger than hardlimit seems meaningless for disk quota but currently it is allowed. In this case, there may be a bit of comfusion for users when they run df comamnd to directory which has project quota. For example, we set 20M softlimit and 10M hardlimit of block usage limit for project quota of test_dir(project id 123). [root@hades f2fs]# repquota -P -a *** Report for project quotas on device /dev/nvme0n1p8 Block grace time: 7days; Inode grace time: 7days Block limits File limits Project used soft hard grace used soft hard grace ---------------------------------------------------------------------- 0 -- 4 0 0 1 0 0 123 +- 10248 20480 10240 2 0 0 The result of df command as below: [root@hades f2fs]# df -h /mnt/f2fs/test Filesystem Size Used Avail Use% Mounted on /dev/nvme0n1p8 20M 11M 10M 51% /mnt/f2fs Even though it looks like there is another 10M free space to use, if we write new data to diretory test(inherit project id), the write will fail with errno(-EDQUOT). After this patch, the df result looks like below. [root@hades f2fs]# df -h /mnt/f2fs/test Filesystem Size Used Avail Use% Mounted on /dev/nvme0n1p8 10M 10M 0 100% /mnt/f2fs Signed-off-by: Chengguang Xu Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim Signed-off-by: Sasha Levin --- fs/f2fs/super.c | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-) diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index e4aabfc21bd43..8635df6cba553 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -912,9 +912,13 @@ static int f2fs_statfs_project(struct super_block *sb, return PTR_ERR(dquot); spin_lock(&dq_data_lock); - limit = (dquot->dq_dqb.dqb_bsoftlimit ? - dquot->dq_dqb.dqb_bsoftlimit : - dquot->dq_dqb.dqb_bhardlimit) >> sb->s_blocksize_bits; + limit = 0; + if (dquot->dq_dqb.dqb_bsoftlimit) + limit = dquot->dq_dqb.dqb_bsoftlimit; + if (dquot->dq_dqb.dqb_bhardlimit && + (!limit || dquot->dq_dqb.dqb_bhardlimit < limit)) + limit = dquot->dq_dqb.dqb_bhardlimit; + if (limit && buf->f_blocks > limit) { curblock = dquot->dq_dqb.dqb_curspace >> sb->s_blocksize_bits; buf->f_blocks = limit; @@ -923,9 +927,13 @@ static int f2fs_statfs_project(struct super_block *sb, (buf->f_blocks - curblock) : 0; } - limit = dquot->dq_dqb.dqb_isoftlimit ? - dquot->dq_dqb.dqb_isoftlimit : - dquot->dq_dqb.dqb_ihardlimit; + limit = 0; + if (dquot->dq_dqb.dqb_isoftlimit) + limit = dquot->dq_dqb.dqb_isoftlimit; + if (dquot->dq_dqb.dqb_ihardlimit && + (!limit || dquot->dq_dqb.dqb_ihardlimit < limit)) + limit = dquot->dq_dqb.dqb_ihardlimit; + if (limit && buf->f_files > limit) { buf->f_files = limit; buf->f_ffree = -- 2.20.1