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 D11A1C433FE for ; Wed, 23 Nov 2022 12:44:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237716AbiKWMom (ORCPT ); Wed, 23 Nov 2022 07:44:42 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48764 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237398AbiKWMoB (ORCPT ); Wed, 23 Nov 2022 07:44:01 -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 9BBFC6F379; Wed, 23 Nov 2022 04:42:13 -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 92D07B81EA3; Wed, 23 Nov 2022 12:42:12 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 88D8DC433D7; Wed, 23 Nov 2022 12:42:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1669207331; bh=7HrHSbvCNa7WukYhl524NNVbHAbsFaL6mj/mEIVSwFE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=uW4O5P07178H+S7NqlmbAO1fBY9PCvxpglM5o3X7Ff/kifT1gmj20RnfOO5VfPou2 Wex5Y9KGF00BqGP1nvK4Dz2xVHHrW3yYSPfoTD1/bt6+4CO1agWl3D9fEyd+0E7rB2 cRJFliDvmnJxIyjn3CcfnoZGKxGHjArtpNwgweljcaOw8ZpnPjK6Q4BpwpG4J0Kg5a vyjgW8Sa7RxjKUOPRa9UteikmNilFcyF9gYOlizT2Is5vKU+L9dcxR2rB5e8xoxgB/ iNN+jU35jukCGutbnGXlwNAmvcPXisPl1z6AgxVQLTkv+/429+PDDNoHbNfkwo1Ppa AbZlNDygmm5Hw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Damien Le Moal , Johannes Thumshirn , Sasha Levin , naohiro.aota@wdc.com, linux-fsdevel@vger.kernel.org Subject: [PATCH AUTOSEL 6.0 29/44] zonefs: fix zone report size in __zonefs_io_error() Date: Wed, 23 Nov 2022 07:40:38 -0500 Message-Id: <20221123124057.264822-29-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20221123124057.264822-1-sashal@kernel.org> References: <20221123124057.264822-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Damien Le Moal [ Upstream commit 7dd12d65ac646046a3fe0bbf9a4e86f4514207b3 ] When an IO error occurs, the function __zonefs_io_error() is used to issue a zone report to obtain the latest zone information from the device. This function gets a zone report for all zones used as storage for a file, which is always 1 zone except for files representing aggregated conventional zones. The number of zones of a zone report for a file is calculated in __zonefs_io_error() by doing a bit-shift of the inode i_zone_size field, which is equal to or larger than the device zone size. However, this calculation does not take into account that the last zone of a zoned device may be smaller than the zone size reported by bdev_zone_sectors() (which is used to set the bit shift size). As a result, if an error occurs for an IO targetting such last smaller zone, the zone report will ask for 0 zones, leading to an invalid zone report. Fix this by using the fact that all files require a 1 zone report, except if the inode i_zone_size field indicates a zone size larger than the device zone size. This exception case corresponds to a mount with aggregated conventional zones. A check for this exception is added to the file inode initialization during mount. If an invalid setup is detected, emit an error and fail the mount (check contributed by Johannes Thumshirn). Signed-off-by: Johannes Thumshirn Signed-off-by: Damien Le Moal Signed-off-by: Sasha Levin --- fs/zonefs/super.c | 37 +++++++++++++++++++++++++++---------- 1 file changed, 27 insertions(+), 10 deletions(-) diff --git a/fs/zonefs/super.c b/fs/zonefs/super.c index 860f0b1032c6..abc9a85106f2 100644 --- a/fs/zonefs/super.c +++ b/fs/zonefs/super.c @@ -478,14 +478,22 @@ static void __zonefs_io_error(struct inode *inode, bool write) struct super_block *sb = inode->i_sb; struct zonefs_sb_info *sbi = ZONEFS_SB(sb); unsigned int noio_flag; - unsigned int nr_zones = - zi->i_zone_size >> (sbi->s_zone_sectors_shift + SECTOR_SHIFT); + unsigned int nr_zones = 1; struct zonefs_ioerr_data err = { .inode = inode, .write = write, }; int ret; + /* + * The only files that have more than one zone are conventional zone + * files with aggregated conventional zones, for which the inode zone + * size is always larger than the device zone size. + */ + if (zi->i_zone_size > bdev_zone_sectors(sb->s_bdev)) + nr_zones = zi->i_zone_size >> + (sbi->s_zone_sectors_shift + SECTOR_SHIFT); + /* * Memory allocations in blkdev_report_zones() can trigger a memory * reclaim which may in turn cause a recursion into zonefs as well as @@ -1407,6 +1415,14 @@ static int zonefs_init_file_inode(struct inode *inode, struct blk_zone *zone, zi->i_ztype = type; zi->i_zsector = zone->start; zi->i_zone_size = zone->len << SECTOR_SHIFT; + if (zi->i_zone_size > bdev_zone_sectors(sb->s_bdev) << SECTOR_SHIFT && + !(sbi->s_features & ZONEFS_F_AGGRCNV)) { + zonefs_err(sb, + "zone size %llu doesn't match device's zone sectors %llu\n", + zi->i_zone_size, + bdev_zone_sectors(sb->s_bdev) << SECTOR_SHIFT); + return -EINVAL; + } zi->i_max_size = min_t(loff_t, MAX_LFS_FILESIZE, zone->capacity << SECTOR_SHIFT); @@ -1456,11 +1472,11 @@ static struct dentry *zonefs_create_inode(struct dentry *parent, struct inode *dir = d_inode(parent); struct dentry *dentry; struct inode *inode; - int ret; + int ret = -ENOMEM; dentry = d_alloc_name(parent, name); if (!dentry) - return NULL; + return ERR_PTR(ret); inode = new_inode(parent->d_sb); if (!inode) @@ -1485,7 +1501,7 @@ static struct dentry *zonefs_create_inode(struct dentry *parent, dput: dput(dentry); - return NULL; + return ERR_PTR(ret); } struct zonefs_zone_data { @@ -1505,7 +1521,7 @@ static int zonefs_create_zgroup(struct zonefs_zone_data *zd, struct blk_zone *zone, *next, *end; const char *zgroup_name; char *file_name; - struct dentry *dir; + struct dentry *dir, *dent; unsigned int n = 0; int ret; @@ -1523,8 +1539,8 @@ static int zonefs_create_zgroup(struct zonefs_zone_data *zd, zgroup_name = "seq"; dir = zonefs_create_inode(sb->s_root, zgroup_name, NULL, type); - if (!dir) { - ret = -ENOMEM; + if (IS_ERR(dir)) { + ret = PTR_ERR(dir); goto free; } @@ -1570,8 +1586,9 @@ static int zonefs_create_zgroup(struct zonefs_zone_data *zd, * Use the file number within its group as file name. */ snprintf(file_name, ZONEFS_NAME_MAX - 1, "%u", n); - if (!zonefs_create_inode(dir, file_name, zone, type)) { - ret = -ENOMEM; + dent = zonefs_create_inode(dir, file_name, zone, type); + if (IS_ERR(dent)) { + ret = PTR_ERR(dent); goto free; } -- 2.35.1