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Commit 7abce6be authored by Pete Zaitcev's avatar Pete Zaitcev Committed by Greg Kroah-Hartman
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USB: usbmon: Implement compat_ioctl 



Running a 32-bit usbmon(8) on 2.6.28-rc9 produces the following:
ioctl32(usbmon:28563): Unknown cmd fd(3) cmd(400c9206){t:ffffff92;sz:12} arg(ffd3f458) on /dev/usbmon0

It happens because the compatibility mode was implemented for 2.6.18
and not updated for the fsops.compat_ioctl API.

This patch relocates the pieces from under #ifdef CONFIG_COMPAT into
compat_ioctl with no other changes except one new whitespace.

Signed-off-by: default avatarPete Zaitcev <zaitcev@redhat.com>
Cc: stable <stable@kernel.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 11e76ae0

drivers/usb/mon/mon_bin.c

+66 −39
Original line number Diff line number Diff line
@@ -37,6 +37,7 @@ 
#define MON_IOCX_GET   _IOW(MON_IOC_MAGIC, 6, struct mon_bin_get)

#define MON_IOCX_MFETCH _IOWR(MON_IOC_MAGIC, 7, struct mon_bin_mfetch)

#define MON_IOCH_MFLUSH _IO(MON_IOC_MAGIC, 8)



#ifdef CONFIG_COMPAT

#define MON_IOCX_GET32 _IOW(MON_IOC_MAGIC, 6, struct mon_bin_get32)

#define MON_IOCX_MFETCH32 _IOWR(MON_IOC_MAGIC, 7, struct mon_bin_mfetch32)
@@ -921,21 +922,6 @@ static int mon_bin_ioctl(struct inode *inode, struct file *file, 
		}

		break;



#ifdef CONFIG_COMPAT

	case MON_IOCX_GET32: {

		struct mon_bin_get32 getb;



		if (copy_from_user(&getb, (void __user *)arg,

					    sizeof(struct mon_bin_get32)))

			return -EFAULT;



		ret = mon_bin_get_event(file, rp,

		    compat_ptr(getb.hdr32), compat_ptr(getb.data32),

		    getb.alloc32);

		}

		break;

#endif



	case MON_IOCX_MFETCH:

		{

		struct mon_bin_mfetch mfetch;
@@ -962,7 +948,57 @@ static int mon_bin_ioctl(struct inode *inode, struct file *file, 
		}

		break;



	case MON_IOCG_STATS: {

		struct mon_bin_stats __user *sp;

		unsigned int nevents;

		unsigned int ndropped;



		spin_lock_irqsave(&rp->b_lock, flags);

		ndropped = rp->cnt_lost;

		rp->cnt_lost = 0;

		spin_unlock_irqrestore(&rp->b_lock, flags);

		nevents = mon_bin_queued(rp);



		sp = (struct mon_bin_stats __user *)arg;

		if (put_user(rp->cnt_lost, &sp->dropped))

			return -EFAULT;

		if (put_user(nevents, &sp->queued))

			return -EFAULT;



		}

		break;



	default:

		return -ENOTTY;

	}



	return ret;

}



#ifdef CONFIG_COMPAT

static long mon_bin_compat_ioctl(struct file *file,

    unsigned int cmd, unsigned long arg)

{

	struct mon_reader_bin *rp = file->private_data;

	int ret;



	switch (cmd) {



	case MON_IOCX_GET32: {

		struct mon_bin_get32 getb;



		if (copy_from_user(&getb, (void __user *)arg,

					    sizeof(struct mon_bin_get32)))

			return -EFAULT;



		ret = mon_bin_get_event(file, rp,

		    compat_ptr(getb.hdr32), compat_ptr(getb.data32),

		    getb.alloc32);

		if (ret < 0)

			return ret;

		}

		return 0;



	case MON_IOCX_MFETCH32:

		{

		struct mon_bin_mfetch32 mfetch;
@@ -986,37 +1022,25 @@ static int mon_bin_ioctl(struct inode *inode, struct file *file, 
			return ret;

		if (put_user(ret, &uptr->nfetch32))

			return -EFAULT;

		ret = 0;

		}

		break;

#endif



	case MON_IOCG_STATS: {

		struct mon_bin_stats __user *sp;

		unsigned int nevents;

		unsigned int ndropped;



		spin_lock_irqsave(&rp->b_lock, flags);

		ndropped = rp->cnt_lost;

		rp->cnt_lost = 0;

		spin_unlock_irqrestore(&rp->b_lock, flags);

		nevents = mon_bin_queued(rp);

		return 0;



		sp = (struct mon_bin_stats __user *)arg;

		if (put_user(rp->cnt_lost, &sp->dropped))

			return -EFAULT;

		if (put_user(nevents, &sp->queued))

			return -EFAULT;

	case MON_IOCG_STATS:

		return mon_bin_ioctl(NULL, file, cmd,

					    (unsigned long) compat_ptr(arg));



		}

		break;

	case MON_IOCQ_URB_LEN:

	case MON_IOCQ_RING_SIZE:

	case MON_IOCT_RING_SIZE:

	case MON_IOCH_MFLUSH:

		return mon_bin_ioctl(NULL, file, cmd, arg);



	default:

		return -ENOTTY;

		;

	}



	return ret;

	return -ENOTTY;

}

#endif /* CONFIG_COMPAT */



static unsigned int

mon_bin_poll(struct file *file, struct poll_table_struct *wait)
@@ -1094,6 +1118,9 @@ static const struct file_operations mon_fops_binary = { 
	/* .write =	mon_text_write, */

	.poll =		mon_bin_poll,

	.ioctl =	mon_bin_ioctl,

#ifdef CONFIG_COMPAT

	.compat_ioctl =	mon_bin_compat_ioctl,

#endif

	.release =	mon_bin_release,

	.mmap =		mon_bin_mmap,

};