linux-ext4 - [PATCH 1/4] jbd: abort when failed to log metadata buffers

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Message-ID: <48887776.4080504@hitachi.com>
Date:	Thu, 24 Jul 2008 21:37:10 +0900
From:	Hidehiro Kawai <hidehiro.kawai.ez@...achi.com>
To:	akpm@...ux-foundation.org, sct@...hat.com
Cc:	linux-kernel@...r.kernel.org, linux-ext4@...r.kernel.org,
	jack@...e.cz, jbacik@...hat.com, cmm@...ibm.com, tytso@....edu,
	adilger@...sterfs.com, snitzer@...il.com, tglx@...utronix.de,
	yumiko.sugita.yf@...achi.com, satoshi.oshima.fk@...achi.com
Subject: [PATCH 1/4] jbd: abort when failed to log metadata buffers

If we failed to write metadata buffers to the journal space and
succeeded to write the commit record, stale data can be written
back to the filesystem as metadata in the recovery phase.

To avoid this, when we failed to write out metadata buffers,
abort the journal before writing the commit record.

Signed-off-by: Hidehiro Kawai <hidehiro.kawai.ez@...achi.com>
Acked-by: Jan Kara <jack@...e.cz>
---
 fs/jbd/commit.c |    3 +++
 1 file changed, 3 insertions(+)

Index: linux-2.6.26-rc8-mm1/fs/jbd/commit.c
===================================================================
--- linux-2.6.26-rc8-mm1.orig/fs/jbd/commit.c
+++ linux-2.6.26-rc8-mm1/fs/jbd/commit.c
@@ -762,6 +762,9 @@ wait_for_iobuf:
 		/* AKPM: bforget here */
 	}
 
+	if (err)
+		journal_abort(journal, err);
+
 	jbd_debug(3, "JBD: commit phase 6\n");
 
 	if (journal_write_commit_record(journal, commit_transaction))


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