From patchwork Tue Feb 7 07:09:30 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: zhanchengbin X-Patchwork-Id: 1738687 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=ozlabs.org (client-ip=150.107.74.76; helo=gandalf.ozlabs.org; envelope-from=srs0=sp4l=6d=vger.kernel.org=linux-ext4-owner@ozlabs.org; receiver=) Received: from gandalf.ozlabs.org (gandalf.ozlabs.org [150.107.74.76]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384) server-digest SHA384) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4P9tvB1Cd4z23r8 for ; Tue, 7 Feb 2023 17:46:14 +1100 (AEDT) Received: from gandalf.ozlabs.org (gandalf.ozlabs.org [150.107.74.76]) by gandalf.ozlabs.org (Postfix) with ESMTP id 4P9tv84rzxz4x2c for ; Tue, 7 Feb 2023 17:46:12 +1100 (AEDT) Received: by gandalf.ozlabs.org (Postfix) id 4P9tv84fJlz4xGR; Tue, 7 Feb 2023 17:46:12 +1100 (AEDT) Delivered-To: patchwork-incoming@ozlabs.org Authentication-Results: gandalf.ozlabs.org; dmarc=fail (p=quarantine dis=none) header.from=huawei.com Authentication-Results: gandalf.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=2620:137:e000::1:20; helo=out1.vger.email; envelope-from=linux-ext4-owner@vger.kernel.org; receiver=) Received: from out1.vger.email (out1.vger.email [IPv6:2620:137:e000::1:20]) by gandalf.ozlabs.org (Postfix) with ESMTP id 4P9tv772G7z4x2c for ; Tue, 7 Feb 2023 17:46:11 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230321AbjBGGqK (ORCPT ); Tue, 7 Feb 2023 01:46:10 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55884 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230294AbjBGGqJ (ORCPT ); Tue, 7 Feb 2023 01:46:09 -0500 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5716F18B for ; Mon, 6 Feb 2023 22:46:08 -0800 (PST) Received: from dggpeml500016.china.huawei.com (unknown [172.30.72.57]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4P9ttj6QlxzfZ09; Tue, 7 Feb 2023 14:45:49 +0800 (CST) Received: from huawei.com (10.175.127.227) by dggpeml500016.china.huawei.com (7.185.36.70) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.34; Tue, 7 Feb 2023 14:46:05 +0800 From: zhanchengbin To: , CC: , , , , zhanchengbin , Jan Kara Subject: [PATCH v3 1/2] ext4: fix inode tree inconsistency caused by ENOMEM in ext4_split_extent_at Date: Tue, 7 Feb 2023 15:09:30 +0800 Message-ID: <20230207070931.2189663-2-zhanchengbin1@huawei.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20230207070931.2189663-1-zhanchengbin1@huawei.com> References: <20230207070931.2189663-1-zhanchengbin1@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.127.227] X-ClientProxiedBy: dggems704-chm.china.huawei.com (10.3.19.181) To dggpeml500016.china.huawei.com (7.185.36.70) X-CFilter-Loop: Reflected X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org If ENOMEM fails when the extent is splitting, we need to restore the length of the split extent. In the call stack of the ext4_split_extent_at function, only in ext4_ext_create_new_leaf will it alloc memory and change the shape of the extent tree,even if an ENOMEM is returned at this time, the extent tree is still self-consistent, Just restore the split extent lens in the function ext4_split_extent_at. ext4_split_extent_at ext4_ext_insert_extent ext4_ext_create_new_leaf 1)ext4_ext_split ext4_find_extent 2)ext4_ext_grow_indepth ext4_find_extent Signed-off-by: zhanchengbin Reviewed-by: Jan Kara --- fs/ext4/extents.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index 9de1c9d1a13d..3559ea6b0781 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -3251,7 +3251,7 @@ static int ext4_split_extent_at(handle_t *handle, ext4_ext_mark_unwritten(ex2); err = ext4_ext_insert_extent(handle, inode, ppath, &newex, flags); - if (err != -ENOSPC && err != -EDQUOT) + if (err != -ENOSPC && err != -EDQUOT && err != -ENOMEM) goto out; if (EXT4_EXT_MAY_ZEROOUT & split_flag) {