linux-kernel - Re: [fuse-devel] [PATCH 5/7] FUSE: implement ioctl support

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Message-ID: <48B7E388.3000403@kernel.org>
Date:	Fri, 29 Aug 2008 13:54:48 +0200
From:	Tejun Heo <tj@...nel.org>
To:	Roger Willcocks <roger@...mlight.ltd.uk>
CC:	Miklos Szeredi <miklos@...redi.hu>,
	fuse-devel@...ts.sourceforge.net, greg@...ah.com,
	linux-kernel@...r.kernel.org
Subject: Re: [fuse-devel] [PATCH 5/7] FUSE: implement ioctl support

Roger Willcocks wrote:
> One thing to bear in mind is the possibility of 32-bit client programs
> running on a 64-bit platform, so your user-space driver will need be be
> aware of the flavour of the client, and parse the ioctl arguments (and
> in particular, pointers) appropriately.
> 
> That's true of a kernel implementation too, of course.

Yeap, for 32bit client on 64bit machine, FUSE_IOCTL_COMPAT will be set.
 For OSS emulation, it doesn't make any difference tho.  It's the same
for both word sizes.

Thanks.

-- 
tejun
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