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Re: xfs_db

To: Anshul Kundra <anshul.kundra@xxxxxxx>
Subject: Re: xfs_db
From: Eric Sandeen <sandeen@xxxxxxxxxxx>
Date: Mon, 15 Oct 2012 15:47:38 -0500
Cc: "xfs@xxxxxxxxxxx" <xfs@xxxxxxxxxxx>
In-reply-to: <CACBF2D716C5104BAC48A16827DE5B1513576996C6@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
References: <CACBF2D716C5104BAC48A16827DE5B1513576996C6@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:16.0) Gecko/20121010 Thunderbird/16.0.1
On 10/15/12 9:34 AM, Anshul Kundra wrote:
> Suppose in XFS file system I want to corrupt a inode of my choice,
> will it be possible using xfs_db
> 
> Xfs_db blockget < inode number > blocktrash < seed value and type of
> block >
> 
> In the manuals it is written that it takes a random inodes for the
> corruption which it does in actual practice, so can I use any
> specific command to corrupt the inode (131 )

As the manual says, blocktrash trashes random metadata blocks (possibly
of specified type).

You can, however, write whatever you want into various fields of
inode 131 via xfs_db, there's just no built-in random method to
do that.

-Eric

> 
> Thanks & Regards
> 
> Anshul Kundra
> 
> 
> 

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