From: Andi Kleen <ak@muc.de>
To: Christoph Hellwig <hch@infradead.org>,
akpm@osdl.org, linux-kernel@vger.kernel.org,
viro@parcelfarce.linux.theplanet.co.uk
Subject: Re: [PATCH] Support compat_ioctl for block devices
Date: 18 Jan 2005 10:31:58 +0100
Date: Tue, 18 Jan 2005 10:31:58 +0100 [thread overview]
Message-ID: <20050118093158.GB20002@muc.de> (raw)
In-Reply-To: <20050118091927.GA24768@infradead.org>
On Tue, Jan 18, 2005 at 09:19:27AM +0000, Christoph Hellwig wrote:
> > +long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg)
> > +{
> > + struct block_device *bdev = file->f_dentry->d_inode->i_bdev;
> > + struct gendisk *disk = bdev->bd_disk;
> > + int ret = -ENOIOCTLCMD;
> > + if (disk->fops->compat_ioctl) {
> > + lock_kernel();
> > + ret = disk->fops->compat_ioctl(file, cmd, arg);
> > + unlock_kernel();
> > + }
> > + return ret;
> > +}
>
> - please don't introduce a new API with the BKL held.
Nope, I'm not going to audit zillions of low level functions for this.
> - prototype isn't nice. just passing the gendisk for block_device
> should be enough.
No, it isn't, the compat handler needs cmd and arg, and file is useful
when you pass it to an existing ioctl handler.
-Andi
next prev parent reply other threads:[~2005-01-18 9:32 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-18 7:56 [PATCH] Support compat_ioctl for block devices Andi Kleen
2005-01-18 9:19 ` Christoph Hellwig
2005-01-18 9:31 ` Andi Kleen [this message]
2005-01-18 9:36 ` Christoph Hellwig
2005-01-18 9:51 ` Andi Kleen
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