Re: [PATCH] btrfs: Don't continue mounting when superblock csum mismatches even generation is less than 10.

[Qu Wenruo <quwenruo@cn.fujitsu.com>]

-------- Original Message --------
Subject: Re: [PATCH] btrfs: Don't continue mounting when superblock csum 
mismatches even generation is less than 10.
From: Chris Mason <clm@fb.com>
To: Qu Wenruo <quwenruo@cn.fujitsu.com>, <linux-btrfs@vger.kernel.org>
Date: 2014年08月20日 03:48
> On 08/06/2014 10:51 PM, Qu Wenruo wrote:
>> It seems that the patch is rejected in patchwork,
>>
>> Could any one tell me the reason?
> I had nack'd it because I was worried at the time about the super crc
> errors that Dave had found in the past.  Sorry, I really thought I had
> sent email about it.
>
> But Dave has a great point in his reply about validating the super
> generation.
Thanks for the reason.
I'll search and look at Dave's mail and dig into it.

Although as mentioned in the reply to David,
the main problem is that I found two disk images with crazy values in 
superblock and wrong csum,
but generation is still 4, and ignoring the csum error caused kernel BUG.

Thanks,
Qu

>
> -chris