linux-kernel - Re: get device from file struct

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Message-ID: <457DA4A0.4060108@ens-lyon.org>
Date:	Mon, 11 Dec 2006 19:34:08 +0100
From:	Brice Goglin <Brice.Goglin@...-lyon.org>
To:	silviu.craciunas@....ac.at
CC:	linux-kernel@...r.kernel.org
Subject: Re: get device from file struct

Silviu Craciunas wrote:
> quick question for the gurus.. is it possible to determine the hardware
> device from a file struct during read/write system call. For example in
> fs/read_write.c when doing a vfs_read.  
>   

file->f_dentry->d_inode gives you the inode. If the inode is on top of a
block device, inode->i_bdev gives you a struct block_device that might
help you.

Brice

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