linux-ext4 - Re: [PATCH] e2fsck: fix "can't find dup

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Date:	Sat, 19 Nov 2011 16:32:01 +0800
From:	Robin Dong <hao.bigrat@...il.com>
To:	"Ted Ts'o" <tytso@....edu>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: [PATCH] e2fsck: fix "can't find dup_blk" error

2011/11/19 Ted Ts'o <tytso@....edu>:
> On Fri, Nov 18, 2011 at 10:52:38AM +0800, Robin Dong wrote:
>> From: Robin Dong <sanbai@...bao.com>
>>
>> After:
>> 1. mke2fs -O ^has_journal,^resize_inode,^uninit_bg,extent,meta_bg,flex_bg,bigalloc /dev/sda
>> 2. mount -t ext4 /dev/sda /test/
>> 3. create file (8192K size, extent' e_len is 2) /test/1 ~ /test/10
>> 4. use tool to change the /test/5 extent's e_len to 100, corrupt file
>> 5. e2fsck -f /dev/sda
>
> I can't replicate this.  I presume it only shows up with your
> modification to the bigalloc format?
>
>                                                - Ted
>

Hi, Ted

I am not using my modification bigalloc format.
I use the upstream kernel (3.2-rc2) and uptodate e2fsprogs master
branch code, the error report will emerge after my steps above.
My /dev/sda is small (about 100G), so I guess:

# create /test/1 ~ /test/100 (e_len == 2)
# make /test/5 's e_len to 1024

may replicate this problem on larger disk.


-- 
--
Best Regard
Robin Dong
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