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linux-next/net/atm/resources.h
David Woodhouse 8865c418ca atm: 32-bit ioctl compatibility
We lack compat ioctl support through most of the ATM code. This patch
deals with most of it, and I can now at least use BR2684 and PPPoATM
with 32-bit userspace.

I haven't added a .compat_ioctl method to struct atm_ioctl, because
AFAICT none of the current users need any conversion -- so we can just
call the ->ioctl() method in every case. I looked at br2684, clip, lec,
mpc, pppoatm and atmtcp.

In svc_compat_ioctl() the only mangling which is needed is to change
COMPAT_ATM_ADDPARTY to ATM_ADDPARTY. Although it's defined as
	_IOW('a', ATMIOC_SPECIAL+4,struct atm_iobuf)
it doesn't actually _take_ a struct atm_iobuf as an argument -- it takes
a struct sockaddr_atmsvc, which _is_ the same between 32-bit and 64-bit
code, so doesn't need conversion.

Almost all of vcc_ioctl() would have been identical, so I converted that
into a core do_vcc_ioctl() function with an 'int compat' argument.

I've done the same with atm_dev_ioctl(), where there _are_ a few
differences, but still it's relatively contained and there would
otherwise have been a lot of duplication.

I haven't done any of the actual device-specific ioctls, although I've
added a compat_ioctl method to struct atmdev_ops.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-12-03 22:12:38 -08:00

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C

/* net/atm/resources.h - ATM-related resources */
/* Written 1995-1998 by Werner Almesberger, EPFL LRC/ICA */
#ifndef NET_ATM_RESOURCES_H
#define NET_ATM_RESOURCES_H
#include <linux/atmdev.h>
#include <linux/mutex.h>
extern struct list_head atm_devs;
extern struct mutex atm_dev_mutex;
int atm_dev_ioctl(unsigned int cmd, void __user *arg, int compat);
#ifdef CONFIG_PROC_FS
#include <linux/proc_fs.h>
void *atm_dev_seq_start(struct seq_file *seq, loff_t *pos);
void atm_dev_seq_stop(struct seq_file *seq, void *v);
void *atm_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos);
int atm_proc_dev_register(struct atm_dev *dev);
void atm_proc_dev_deregister(struct atm_dev *dev);
#else
static inline int atm_proc_dev_register(struct atm_dev *dev)
{
return 0;
}
static inline void atm_proc_dev_deregister(struct atm_dev *dev)
{
/* nothing */
}
#endif /* CONFIG_PROC_FS */
int atm_register_sysfs(struct atm_dev *adev);
void atm_unregister_sysfs(struct atm_dev *adev);
#endif