Re: [PATCH 01/17] VFS: Implement the pioctl() system call

From: Christoph Hellwig
Date: Tue Jun 16 2009 - 16:55:42 EST

On Tue, Jun 16, 2009 at 09:38:51PM +0100, David Howells wrote:
> From: Jacob Thebault-Spieker <summatusmentis@xxxxxxxxx>
> Implement the pioctl() system call. This is used to support a number of AFS
> functions, and could also be used for Coda and other filesystems.

Umm, adding a new system call multiplexer without any structure is a
serious no-go. And this one is much worse than ioctl, which with a
fixed [fd,cmd,arg] tuple seems like a stronhold of sanity compred to this
monster with multiple arguments and a path that may or may not be there.

I think you'd be better of writing tools that use a sane interface than
adding a big pile of crap like this to the kernel.

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