linux-kernel - Re: get device from file struct

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Date:	Tue, 12 Dec 2006 10:04:08 +0100
From:	Silviu Craciunas <silviu.craciunas@....ac.at>
To:	Brice Goglin <Brice.Goglin@...-lyon.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: get device from file struct

On Mon, 2006-12-11 at 19:34 +0100, Brice Goglin wrote:
> 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

thanks for the reply, the block device can be determined with the major
and minor numbers , what I would be more interested in is if one can get
the net_device struct from the file struct

silviu

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