linux-ext4 - Re: ext4 fails on ext2 filesystems

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Message-ID: <20090120145100.GD10037@mit.edu>
Date:	Tue, 20 Jan 2009 09:51:00 -0500
From:	Theodore Tso <tytso@....edu>
To:	Jörg Sommer <joerg@...a.gnuu.de>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: ext4 fails on ext2 filesystems

On Sun, Jan 18, 2009 at 11:04:59AM +0100, Jörg Sommer wrote:
> > > [  203.082300] EXT4 FS on hda3, no journal
> > > [  205.746713] EXT4-fs error (device hda3): ext4_free_data: circular indirect block detected, inode=165056, block=184476
> > > 

Hi, this patch should fix your problem.

						- Ted

commit bf3baec2b4529dcf47ee422a48b8c0e83df7f0a0
Author: Theodore Ts'o <tytso@....edu>
Date:   Tue Jan 20 09:50:19 2009 -0500

    ext4: Fix ext4_free_blocks() w/o a journal when files have indirect blocks
    
    When trying to unlink a file with indirect blocks on a filesystem
    without a journal, the "circular indirect block" sanity test was
    getting falsely triggered.
    
    Signed-off-by: "Theodore Ts'o" <tytso@....edu>

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 49484ba..b4386da 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3622,7 +3622,7 @@ static void ext4_free_data(handle_t *handle, struct inode *inode,
 		 * block pointed to itself, it would have been detached when
 		 * the block was cleared. Check for this instead of OOPSing.
 		 */
-		if (bh2jh(this_bh))
+		if ((EXT4_JOURNAL(inode) == NULL) || bh2jh(this_bh))
 			ext4_handle_dirty_metadata(handle, inode, this_bh);
 		else
 			ext4_error(inode->i_sb, __func__,
--
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