From patchwork Tue Nov 29 00:28:17 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Darrick J. Wong" X-Patchwork-Id: 128129 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 2E5DEB6EE8 for ; Tue, 29 Nov 2011 11:28:57 +1100 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752094Ab1K2A24 (ORCPT ); Mon, 28 Nov 2011 19:28:56 -0500 Received: from e5.ny.us.ibm.com ([32.97.182.145]:57299 "EHLO e5.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750900Ab1K2A2z (ORCPT ); Mon, 28 Nov 2011 19:28:55 -0500 Received: from /spool/local by e5.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 28 Nov 2011 19:28:55 -0500 Received: from d01relay06.pok.ibm.com ([9.56.227.116]) by e5.ny.us.ibm.com ([192.168.1.105]) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; Mon, 28 Nov 2011 19:28:21 -0500 Received: from d01av04.pok.ibm.com (d01av04.pok.ibm.com [9.56.224.64]) by d01relay06.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id pAT0SKO53248380 for ; Mon, 28 Nov 2011 19:28:20 -0500 Received: from d01av04.pok.ibm.com (loopback [127.0.0.1]) by d01av04.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id pAT0SIW0030105 for ; Mon, 28 Nov 2011 19:28:20 -0500 Received: from elm3c44.beaverton.ibm.com (elm3c44.beaverton.ibm.com [9.47.69.44]) by d01av04.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVin) with ESMTP id pAT0SHdM030052; Mon, 28 Nov 2011 19:28:17 -0500 Subject: [PATCH 03/50] debugfs: Optionally ignore bad checksums 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: Mon, 28 Nov 2011 16:28:17 -0800 Message-ID: <20111129002817.17953.11012.stgit@elm3c44.beaverton.ibm.com> In-Reply-To: <20111129002755.17953.19556.stgit@elm3c44.beaverton.ibm.com> References: <20111129002755.17953.19556.stgit@elm3c44.beaverton.ibm.com> User-Agent: StGit/0.15 MIME-Version: 1.0 x-cbid: 11112900-5930-0000-0000-000002A63851 Sender: linux-ext4-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org If someone is debugging a badly damaged filesystem, it might be useful to disable the checksum verifications that will otherwise prevent the filesystem from loading. Signed-off-by: Darrick J. Wong --- debugfs/debugfs.8.in | 7 ++++++- debugfs/debugfs.c | 7 +++++-- 2 files changed, 11 insertions(+), 3 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/debugfs/debugfs.8.in b/debugfs/debugfs.8.in index 70c8326..310dae2 100644 --- a/debugfs/debugfs.8.in +++ b/debugfs/debugfs.8.in @@ -8,7 +8,7 @@ debugfs \- ext2/ext3/ext4 file system debugger .SH SYNOPSIS .B debugfs [ -.B \-DVwci +.B \-DVwcin ] [ .B \-b @@ -48,6 +48,11 @@ file system (e.g /dev/hdXX). Specifies that the file system should be opened in read-write mode. Without this option, the file system is opened in read-only mode. .TP +.I \-n +Disables metadata checksum verification. This should only be used if +you believe the metadata to be correct despite the complaints of +e2fsprogs. +.TP .I \-c Specifies that the file system should be opened in catastrophic mode, in which the inode and group bitmaps are not read initially. This can be diff --git a/debugfs/debugfs.c b/debugfs/debugfs.c index b7ff00d..419c76c 100644 --- a/debugfs/debugfs.c +++ b/debugfs/debugfs.c @@ -2300,9 +2300,9 @@ int main(int argc, char **argv) int catastrophic = 0; char *data_filename = 0; #ifdef READ_ONLY - const char *opt_string = "icR:f:b:s:Vd:D"; + const char *opt_string = "nicR:f:b:s:Vd:D"; #else - const char *opt_string = "iwcR:f:b:s:Vd:D"; + const char *opt_string = "niwcR:f:b:s:Vd:D"; #endif if (debug_prog_name == 0) @@ -2329,6 +2329,9 @@ int main(int argc, char **argv) case 'i': open_flags |= EXT2_FLAG_IMAGE_FILE; break; + case 'n': + open_flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS; + break; #ifndef READ_ONLY case 'w': open_flags |= EXT2_FLAG_RW;