From patchwork Thu Jul 28 07:08:16 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lu Fengqi X-Patchwork-Id: 9250747 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id A11E86075F for ; Thu, 28 Jul 2016 07:09:03 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9150120246 for ; Thu, 28 Jul 2016 07:09:03 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 85F77254F7; Thu, 28 Jul 2016 07:09:03 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2BFA320246 for ; Thu, 28 Jul 2016 07:09:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1163423AbcG1HI7 (ORCPT ); Thu, 28 Jul 2016 03:08:59 -0400 Received: from cn.fujitsu.com ([59.151.112.132]:42349 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1163330AbcG1HI6 (ORCPT ); Thu, 28 Jul 2016 03:08:58 -0400 X-IronPort-AV: E=Sophos;i="5.22,518,1449504000"; d="scan'208";a="9211849" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 28 Jul 2016 15:08:47 +0800 Received: from G08CNEXCHPEKD03.g08.fujitsu.local (unknown [10.167.33.85]) by cn.fujitsu.com (Postfix) with ESMTP id EE2FD42B87CE for ; Thu, 28 Jul 2016 15:08:46 +0800 (CST) Received: from luke.localdomain (10.167.226.118) by G08CNEXCHPEKD03.g08.fujitsu.local (10.167.33.89) with Microsoft SMTP Server (TLS) id 14.3.279.2; Thu, 28 Jul 2016 15:08:46 +0800 From: Lu Fengqi To: CC: Lu Fengqi , Qu Wenruo Subject: [PATCH 04/13] btrfs-progs: check: introduce function to check inode_extref Date: Thu, 28 Jul 2016 15:08:16 +0800 Message-ID: <1469689705-26836-5-git-send-email-lufq.fnst@cn.fujitsu.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1469689705-26836-1-git-send-email-lufq.fnst@cn.fujitsu.com> References: <1469689705-26836-1-git-send-email-lufq.fnst@cn.fujitsu.com> MIME-Version: 1.0 X-Originating-IP: [10.167.226.118] X-yoursite-MailScanner-ID: EE2FD42B87CE.A2B10 X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: lufq.fnst@cn.fujitsu.com Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Introduce a new function check_inode_extref() to check INODE_EXTREF, and call find_dir_item() to find the related DIR_ITEM/DIR_INDEX. Signed-off-by: Lu Fengqi Signed-off-by: Qu Wenruo --- cmds-check.c | 79 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 79 insertions(+) diff --git a/cmds-check.c b/cmds-check.c index be35240..f9d5c8c 100644 --- a/cmds-check.c +++ b/cmds-check.c @@ -4093,6 +4093,85 @@ next: return err; } +/* + * Traverse the given INODE_EXTREF and call find_dir_item() to find related + * DIR_ITEM/DIR_INDEX. + * + * @root: the root of the fs/file tree + * @ref_key: the key of the INODE_EXTREF + * @refs: the count of INODE_EXTREF + * @mode: the st_mode of INODE_ITEM + * + * Return 0 if no error occurred. + */ +static int check_inode_extref(struct btrfs_root *root, + struct btrfs_key *ref_key, + struct extent_buffer *node, int slot, u64 *refs, + int mode) +{ + struct btrfs_key key; + struct btrfs_inode_extref *extref; + char namebuf[BTRFS_NAME_LEN] = {0}; + u32 total; + u32 cur = 0; + u32 len; + u32 name_len; + u64 index; + u64 parent; + int ret; + int err = 0; + + extref = btrfs_item_ptr(node, slot, struct btrfs_inode_extref); + total = btrfs_item_size_nr(node, slot); + +next: + /* update inode ref count */ + (*refs)++; + name_len = btrfs_inode_extref_name_len(node, extref); + index = btrfs_inode_extref_index(node, extref); + parent = btrfs_inode_extref_parent(node, extref); + if (name_len <= BTRFS_NAME_LEN) { + len = name_len; + } else { + len = BTRFS_NAME_LEN; + fprintf(stderr, + "Warning: root %llu INODE_EXTREF[%llu %llu] name too long\n", + root->objectid, ref_key->objectid, ref_key->offset); + } + read_extent_buffer(node, namebuf, (unsigned long)(extref + 1), len); + + /* Check root dir ref name */ + if (index == 0 && strncmp(namebuf, "..", name_len)) { + error( + "root %llu INODE_EXTREF[%llu %llu] ROOT_DIR name shouldn't be %s", + root->objectid, ref_key->objectid, ref_key->offset, namebuf); + err |= ROOT_DIR_ERROR; + } + + /* find related dir_index */ + key.objectid = parent; + key.type = BTRFS_DIR_INDEX_KEY; + key.offset = index; + ret = find_dir_item(root, ref_key, &key, index, namebuf, len, mode); + err |= ret; + + /* find related dir_item */ + key.objectid = parent; + key.type = BTRFS_DIR_ITEM_KEY; + key.offset = btrfs_name_hash(namebuf, len); + ret = find_dir_item(root, ref_key, &key, index, namebuf, len, mode); + err |= ret; + + len = sizeof(*extref) + name_len; + extref = (struct btrfs_inode_extref *)((char *)extref + len); + cur += len; + + if (cur < total) + goto next; + + return err; +} + static int all_backpointers_checked(struct extent_record *rec, int print_errs) { struct rb_node *n;