linux-kernel - Re: [PATCH] Fix proc_file

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Message-ID: <20090830080937.GA13999@x200.localdomain>
Date:	Sun, 30 Aug 2009 12:09:37 +0400
From:	Alexey Dobriyan <adobriyan@...il.com>
To:	Christoph Hellwig <hch@...radead.org>
Cc:	Stefani Seibold <stefani@...bold.net>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] Fix proc_file_write missing ppos update

On Sat, Aug 29, 2009 at 07:16:50PM -0400, Christoph Hellwig wrote:
> On Sat, Aug 29, 2009 at 06:38:12PM +0200, Stefani Seibold wrote:
> > The following fix a long standing issue in the proc_file_write function,
> > which doesn't update the ppos file position pointer.
> 
> The right fix is to get rid of the last remaining
> read_proc_t/write_proc_t instances and switch everyone to implement file
> operations.  Alexey has been working on this on and off for a while.

Yes, please, ->write_proc is going to end very soon.

As for prevoius arguments:
- changing ->write_proc signature is _of course_ going to break
  out-of-tree stuff
- ->proc_fops worked since forever, and since it's struct file_operations,
  nobody prohibits implementing ->write with pos update and what not.
- seq_file is not relevant to this issue because seq_file is for read path
  only.

Back into SCSI pile of users.
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