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=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 1D2A5C433E6 for ; Sun, 10 Jan 2021 03:30:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E5EC422AAA for ; Sun, 10 Jan 2021 03:30:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726283AbhAJDa1 (ORCPT ); Sat, 9 Jan 2021 22:30:27 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42258 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726245AbhAJDa1 (ORCPT ); Sat, 9 Jan 2021 22:30:27 -0500 Received: from mail-pj1-x102a.google.com (mail-pj1-x102a.google.com [IPv6:2607:f8b0:4864:20::102a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D67EAC0617A2 for ; Sat, 9 Jan 2021 19:29:46 -0800 (PST) Received: by mail-pj1-x102a.google.com with SMTP id m5so8411554pjv.5 for ; Sat, 09 Jan 2021 19:29:46 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=f2y3tRispCdnrzAnaMKzGUWJKa7b7cfGubZ2uu6yCUg=; b=bCrLYPL0o62zpd+Kg6R4wFU4mubtrgaDKOpAqhI044P7MPMwtSoD2cY1uGX+xpzwMN zgF76v6GTNOCKxuBxioit0js2BcxfNdiudV4sjchxBpX9DgCeCh/VVDWrB+vNdkrc6DL DuNCBb7le9URwhmxViJstJVLseQFeNQzXCMbNF9x5IB4SBZxcTiZeWuOvn8JDZElXGcU geHKHx8gHK0Y7tXv0VQSIwyr8u/L9xGOm0m/uxkGDDiW9t7rDX18tNC0/OFSEWZvB2yf io7bLbhhJWcn67MF1poBlhKGbcvRU3h/wDcnwAtuRcTQaVMPJ/Vx0HkvHxE2jxmrPhY3 W9wg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=f2y3tRispCdnrzAnaMKzGUWJKa7b7cfGubZ2uu6yCUg=; b=C3lqcB7P0RQJou4j7jVWICsrN4h+o050urkxLuUkY2YKQ/79G5hiX/iqP41HNqSlKY MRnov7Mb/W7dLa2A3k4KM+fPo2cTaDd3unFiSoSelCFagMMg/kQrui+TCA2fR8ul1tQd n2po6H33EQHdcCwPpsw2JDLMkldpAy/j6RTuYjr1lKrFxWzXk0Ew0NFb482n6IPwyMfH 7WfKi+2IgJKRg2jl2BBpKX4KC7xHyU/T7/YojQYCW1CLrXuXiEbhaImmnn8OfirSVAp9 W51NC1O+TCWFzwjpjwnOWWBD5tAUjOfoE0R3N/BVle/LVkQ4SOJRRPJyQVaKEKyTotCV FROg== X-Gm-Message-State: AOAM532eWwigfCuUfAdVhaKUCuUZCZqQe2ejJc/gC6oqOJjCv2Pp2sNG 0aEUbWEL+ZKOJfuW0uCsWCBSdLPD07LOfQ== X-Google-Smtp-Source: ABdhPJxmj406Su49tgtKIi/i3lUBVbBvISsl2TtytKbiGPG8Gyvuq2IaMApl1qPA1ta6z7htHcCsjA== X-Received: by 2002:a17:90a:fc83:: with SMTP id ci3mr11457837pjb.145.1610249386315; Sat, 09 Jan 2021 19:29:46 -0800 (PST) Received: from localhost.localdomain ([122.179.92.100]) by smtp.gmail.com with ESMTPSA id x6sm14079861pfq.57.2021.01.09.19.29.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 09 Jan 2021 19:29:45 -0800 (PST) From: Chandan Babu R To: linux-xfs@vger.kernel.org Cc: Chandan Babu R , darrick.wong@oracle.com, djwong@kernel.org, hch@lst.de, allison.henderson@oracle.com Subject: [PATCH V13 02/16] xfs: Check for extent overflow when trivally adding a new extent Date: Sun, 10 Jan 2021 08:59:14 +0530 Message-Id: <20210110032928.3120861-3-chandanrlinux@gmail.com> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210110032928.3120861-1-chandanrlinux@gmail.com> References: <20210110032928.3120861-1-chandanrlinux@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org When adding a new data extent (without modifying an inode's existing extents) the extent count increases only by 1. This commit checks for extent count overflow in such cases. Reviewed-by: Darrick J. Wong Reviewed-by: Christoph Hellwig Reviewed-by: Allison Henderson Signed-off-by: Chandan Babu R --- fs/xfs/libxfs/xfs_bmap.c | 6 ++++++ fs/xfs/libxfs/xfs_inode_fork.h | 6 ++++++ fs/xfs/xfs_bmap_item.c | 7 +++++++ fs/xfs/xfs_bmap_util.c | 5 +++++ fs/xfs/xfs_dquot.c | 8 +++++++- fs/xfs/xfs_iomap.c | 5 +++++ fs/xfs/xfs_rtalloc.c | 5 +++++ 7 files changed, 41 insertions(+), 1 deletion(-) diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c index bc446418e227..32aeacf6f055 100644 --- a/fs/xfs/libxfs/xfs_bmap.c +++ b/fs/xfs/libxfs/xfs_bmap.c @@ -4527,6 +4527,12 @@ xfs_bmapi_convert_delalloc( return error; xfs_ilock(ip, XFS_ILOCK_EXCL); + + error = xfs_iext_count_may_overflow(ip, whichfork, + XFS_IEXT_ADD_NOSPLIT_CNT); + if (error) + goto out_trans_cancel; + xfs_trans_ijoin(tp, ip, 0); if (!xfs_iext_lookup_extent(ip, ifp, offset_fsb, &bma.icur, &bma.got) || diff --git a/fs/xfs/libxfs/xfs_inode_fork.h b/fs/xfs/libxfs/xfs_inode_fork.h index 0beb8e2a00be..7fc2b129a2e7 100644 --- a/fs/xfs/libxfs/xfs_inode_fork.h +++ b/fs/xfs/libxfs/xfs_inode_fork.h @@ -34,6 +34,12 @@ struct xfs_ifork { #define XFS_IFEXTENTS 0x02 /* All extent pointers are read in */ #define XFS_IFBROOT 0x04 /* i_broot points to the bmap b-tree root */ +/* + * Worst-case increase in the fork extent count when we're adding a single + * extent to a fork and there's no possibility of splitting an existing mapping. + */ +#define XFS_IEXT_ADD_NOSPLIT_CNT (1) + /* * Fork handling. */ diff --git a/fs/xfs/xfs_bmap_item.c b/fs/xfs/xfs_bmap_item.c index 93e4d8ae6e92..0534304ed0a7 100644 --- a/fs/xfs/xfs_bmap_item.c +++ b/fs/xfs/xfs_bmap_item.c @@ -508,6 +508,13 @@ xfs_bui_item_recover( xfs_ilock(ip, XFS_ILOCK_EXCL); xfs_trans_ijoin(tp, ip, 0); + if (bui_type == XFS_BMAP_MAP) { + error = xfs_iext_count_may_overflow(ip, whichfork, + XFS_IEXT_ADD_NOSPLIT_CNT); + if (error) + goto err_cancel; + } + count = bmap->me_len; error = xfs_trans_log_finish_bmap_update(tp, budp, bui_type, ip, whichfork, bmap->me_startoff, bmap->me_startblock, diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c index 7371a7f7c652..db44bfaabe88 100644 --- a/fs/xfs/xfs_bmap_util.c +++ b/fs/xfs/xfs_bmap_util.c @@ -822,6 +822,11 @@ xfs_alloc_file_space( if (error) goto error1; + error = xfs_iext_count_may_overflow(ip, XFS_DATA_FORK, + XFS_IEXT_ADD_NOSPLIT_CNT); + if (error) + goto error0; + xfs_trans_ijoin(tp, ip, 0); error = xfs_bmapi_write(tp, ip, startoffset_fsb, diff --git a/fs/xfs/xfs_dquot.c b/fs/xfs/xfs_dquot.c index 1d95ed387d66..175f544f7c45 100644 --- a/fs/xfs/xfs_dquot.c +++ b/fs/xfs/xfs_dquot.c @@ -314,8 +314,14 @@ xfs_dquot_disk_alloc( return -ESRCH; } - /* Create the block mapping. */ xfs_trans_ijoin(tp, quotip, XFS_ILOCK_EXCL); + + error = xfs_iext_count_may_overflow(quotip, XFS_DATA_FORK, + XFS_IEXT_ADD_NOSPLIT_CNT); + if (error) + return error; + + /* Create the block mapping. */ error = xfs_bmapi_write(tp, quotip, dqp->q_fileoffset, XFS_DQUOT_CLUSTER_SIZE_FSB, XFS_BMAPI_METADATA, 0, &map, &nmaps); diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c index 7b9ff824e82d..f53690febb22 100644 --- a/fs/xfs/xfs_iomap.c +++ b/fs/xfs/xfs_iomap.c @@ -250,6 +250,11 @@ xfs_iomap_write_direct( if (error) goto out_trans_cancel; + error = xfs_iext_count_may_overflow(ip, XFS_DATA_FORK, + XFS_IEXT_ADD_NOSPLIT_CNT); + if (error) + goto out_trans_cancel; + xfs_trans_ijoin(tp, ip, 0); /* diff --git a/fs/xfs/xfs_rtalloc.c b/fs/xfs/xfs_rtalloc.c index b4999fb01ff7..161b0e8992ba 100644 --- a/fs/xfs/xfs_rtalloc.c +++ b/fs/xfs/xfs_rtalloc.c @@ -804,6 +804,11 @@ xfs_growfs_rt_alloc( xfs_ilock(ip, XFS_ILOCK_EXCL); xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); + error = xfs_iext_count_may_overflow(ip, XFS_DATA_FORK, + XFS_IEXT_ADD_NOSPLIT_CNT); + if (error) + goto out_trans_cancel; + /* * Allocate blocks to the bitmap file. */ -- 2.29.2