blob: 67d03156f2c2ed5f975be5ab44ffcbb1eddf7af0 [file] [log] [blame]
/* SPDX-License-Identifier: GPL-2.0 */
#include <linux/compat.h>
#include <uapi/linux/mtio.h>
#include <linux/uaccess.h>
* helper functions for implementing compat ioctls on the four tape
* drivers: we define the 32-bit layout of each incompatible structure,
* plus a wrapper function to copy it to user space in either format.
struct mtget32 {
s32 mt_type;
s32 mt_resid;
s32 mt_dsreg;
s32 mt_gstat;
s32 mt_erreg;
s32 mt_fileno;
s32 mt_blkno;
#define MTIOCGET32 _IOR('m', 2, struct mtget32)
struct mtpos32 {
s32 mt_blkno;
#define MTIOCPOS32 _IOR('m', 3, struct mtpos32)
static inline int put_user_mtget(void __user *u, struct mtget *k)
struct mtget32 k32 = {
.mt_type = k->mt_type,
.mt_resid = k->mt_resid,
.mt_dsreg = k->mt_dsreg,
.mt_gstat = k->mt_gstat,
.mt_erreg = k->mt_erreg,
.mt_fileno = k->mt_fileno,
.mt_blkno = k->mt_blkno,
int ret;
if (in_compat_syscall())
ret = copy_to_user(u, &k32, sizeof(k32));
ret = copy_to_user(u, k, sizeof(*k));
return ret ? -EFAULT : 0;
static inline int put_user_mtpos(void __user *u, struct mtpos *k)
if (in_compat_syscall())
return put_user(k->mt_blkno, (u32 __user *)u);
return put_user(k->mt_blkno, (long __user *)u);