linux-ext4 - Re: ioctl32

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Date:	Fri, 24 Jul 2009 18:26:56 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Eric Sandeen <sandeen@...hat.com>
Cc:	Andreas Dilger <adilger@....com>,
	Ron Johnson <ron.l.johnson@....net>, linux-ext4@...r.kernel.org
Subject: Re: ioctl32

Eric Sandeen <sandeen@...hat.com> writes:
>
> /* pointer to compatible structure or no argument */
> #define COMPATIBLE_IOCTL(cmd) \
>         { (cmd), do_ioctl32_pointer },


The modern way to do this is to use the ->compat_ioctl VFS
method. COMPATIBLE_IOCTL etc are all obsolete.

> I think adding COMPATIBLE_IOCTL(FS_IOC_FIEMAP); to fs/compat_ioctl.c
> should be enough, I'll try to get it tested tomorrow.

Nope, add a ->compat_ioctl 

When your ioctl is already a unlocked_ioctl you can just use
the same function. If not convert to unlocked_ioctl first.

-Andi
-- 
ak@...ux.intel.com -- Speaking for myself only.
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