linux-ext4 - [PATCH 31/47] e2fsck: Handle superblock checksum errors gracefully

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Message-ID: <20111008073632.17888.82871.stgit@elm3c44.beaverton.ibm.com>
Date:	Sat, 08 Oct 2011 00:36:32 -0700
From:	"Darrick J. Wong" <djwong@...ibm.com>
To:	Andreas Dilger <adilger.kernel@...ger.ca>,
	Theodore Tso <tytso@....edu>,
	"Darrick J. Wong" <djwong@...ibm.com>
Cc:	Sunil Mushran <sunil.mushran@...cle.com>,
	Amir Goldstein <amir73il@...il.com>,
	Andi Kleen <andi@...stfloor.org>,
	Mingming Cao <cmm@...ibm.com>,
	Joel Becker <jlbec@...lplan.org>, linux-ext4@...r.kernel.org,
	Coly Li <colyli@...il.com>
Subject: [PATCH 31/47] e2fsck: Handle superblock checksum errors gracefully

If e2fsck finds a superblock with an invalid checksum, try the backups.

Signed-off-by: Darrick J. Wong <djwong@...ibm.com>
---
 e2fsck/unix.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)


diff --git a/e2fsck/unix.c b/e2fsck/unix.c
index 2f4c232..1d81762 100644
--- a/e2fsck/unix.c
+++ b/e2fsck/unix.c
@@ -1184,6 +1184,7 @@ restart:
 	if (!ctx->superblock && !(ctx->options & E2F_OPT_PREEN) &&
 	    !(ctx->flags & E2F_FLAG_SB_SPECIFIED) &&
 	    ((retval == EXT2_ET_BAD_MAGIC) ||
+	     (retval == EXT2_ET_SB_CSUM_INVALID) ||
 	     (retval == EXT2_ET_CORRUPT_SUPERBLOCK) ||
 	     ((retval == 0) && (retval2 = ext2fs_check_desc(fs))))) {
 		if (retval2 == ENOMEM) {

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