From patchwork Wed Mar 7 00:02:55 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Darrick J. Wong" X-Patchwork-Id: 145111 X-Patchwork-Delegate: tytso@mit.edu Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 551F9B6F9D for ; Wed, 7 Mar 2012 11:04:09 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1031632Ab2CGAEC (ORCPT ); Tue, 6 Mar 2012 19:04:02 -0500 Received: from e3.ny.us.ibm.com ([32.97.182.143]:39584 "EHLO e3.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1031633Ab2CGAEA (ORCPT ); Tue, 6 Mar 2012 19:04:00 -0500 Received: from /spool/local by e3.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 6 Mar 2012 19:03:58 -0500 Received: from d01dlp01.pok.ibm.com (9.56.224.56) by e3.ny.us.ibm.com (192.168.1.103) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; Tue, 6 Mar 2012 19:03:03 -0500 Received: from d01relay03.pok.ibm.com (d01relay03.pok.ibm.com [9.56.227.235]) by d01dlp01.pok.ibm.com (Postfix) with ESMTP id 0B20338C8052 for ; Tue, 6 Mar 2012 19:03:03 -0500 (EST) Received: from d01av01.pok.ibm.com (d01av01.pok.ibm.com [9.56.224.215]) by d01relay03.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id q27032X0312388 for ; Tue, 6 Mar 2012 19:03:02 -0500 Received: from d01av01.pok.ibm.com (loopback [127.0.0.1]) by d01av01.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id q275XrYD021497 for ; Wed, 7 Mar 2012 00:33:55 -0500 Received: from elm3b70.beaverton.ibm.com (elm3b70.beaverton.ibm.com [9.47.67.70]) by d01av01.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVin) with ESMTP id q275Xp5r021333; Wed, 7 Mar 2012 00:33:51 -0500 Subject: [PATCH 47/54] e2fsck: Check revoke block checksum during recovery To: Andreas Dilger , Theodore Tso , "Darrick J. Wong" From: "Darrick J. Wong" Cc: Sunil Mushran , Amir Goldstein , Andi Kleen , Mingming Cao , Joel Becker , linux-ext4@vger.kernel.org, Coly Li Date: Tue, 06 Mar 2012 16:02:55 -0800 Message-ID: <20120307000255.11945.37023.stgit@elm3b70.beaverton.ibm.com> In-Reply-To: <20120306235720.11945.30629.stgit@elm3b70.beaverton.ibm.com> References: <20120306235720.11945.30629.stgit@elm3b70.beaverton.ibm.com> User-Agent: StGit/0.15 MIME-Version: 1.0 X-Content-Scanned: Fidelis XPS MAILER x-cbid: 12030700-8974-0000-0000-00000703F7D0 Sender: linux-ext4-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org Verify the revoke block checksum when recovering the journal. Signed-off-by: Darrick J. Wong --- e2fsck/recovery.c | 24 ++++++++++++++++++++++++ 1 files changed, 24 insertions(+), 0 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/e2fsck/recovery.c b/e2fsck/recovery.c index b669941..60c8ceb 100644 --- a/e2fsck/recovery.c +++ b/e2fsck/recovery.c @@ -715,6 +715,27 @@ static int do_one_pass(journal_t *journal, return err; } +static int jbd2_revoke_block_csum_verify(journal_t *j, + void *buf) +{ + struct journal_revoke_tail *tail; + __u32 provided, calculated; + + if (!JFS_HAS_INCOMPAT_FEATURE(j, JFS_FEATURE_INCOMPAT_CSUM_V2)) + return 1; + + tail = (struct journal_revoke_tail *)(buf + j->j_blocksize - + sizeof(struct journal_revoke_tail)); + provided = tail->r_checksum; + tail->r_checksum = 0; + calculated = ext2fs_crc32c_le(~0, j->j_superblock->s_uuid, + sizeof(j->j_superblock->s_uuid)); + calculated = ext2fs_crc32c_le(calculated, buf, j->j_blocksize); + tail->r_checksum = provided; + + provided = ext2fs_be32_to_cpu(provided); + return provided == calculated; +} /* Scan a revoke record, marking all blocks mentioned as revoked. */ @@ -729,6 +750,9 @@ static int scan_revoke_records(journal_t *journal, struct buffer_head *bh, offset = sizeof(journal_revoke_header_t); max = be32_to_cpu(header->r_count); + if (!jbd2_revoke_block_csum_verify(journal, header)) + return -EINVAL; + if (JFS_HAS_INCOMPAT_FEATURE(journal, JFS_FEATURE_INCOMPAT_64BIT)) record_len = 8;