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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061/* SPDX-License-Identifier: GPL-2.0 */#ifndef _LINUX_MTIO_COMPAT_H#define _LINUX_MTIO_COMPAT_H
#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)); else 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); else return put_user(k->mt_blkno, (long __user *)u);}
#endif