1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 *   32bit -> 64bit ioctl wrapper for timer API
  4 *   Copyright (c) by Takashi Iwai <tiwai@suse.de>
  5 */
  6
  7/* This file included from timer.c */
  8
  9#include <linux/compat.h>
 10
 11/*
 12 * ILP32/LP64 has different size for 'long' type. Additionally, the size
 13 * of storage alignment differs depending on architectures. Here, '__packed'
 14 * qualifier is used so that the size of this structure is multiple of 4 and
 15 * it fits to any architectures with 32 bit storage alignment.
 16 */
 17struct snd_timer_gparams32 {
 18	struct snd_timer_id tid;
 19	u32 period_num;
 20	u32 period_den;
 21	unsigned char reserved[32];
 22} __packed;
 23
 24struct snd_timer_info32 {
 25	u32 flags;
 26	s32 card;
 27	unsigned char id[64];
 28	unsigned char name[80];
 29	u32 reserved0;
 30	u32 resolution;
 31	unsigned char reserved[64];
 32};
 33
 34static int snd_timer_user_gparams_compat(struct file *file,
 35					struct snd_timer_gparams32 __user *user)
 36{
 37	struct snd_timer_gparams gparams;
 38
 39	if (copy_from_user(&gparams.tid, &user->tid, sizeof(gparams.tid)) ||
 40	    get_user(gparams.period_num, &user->period_num) ||
 41	    get_user(gparams.period_den, &user->period_den))
 42		return -EFAULT;
 43
 44	return timer_set_gparams(&gparams);
 45}
 46
 47static int snd_timer_user_info_compat(struct file *file,
 48				      struct snd_timer_info32 __user *_info)
 49{
 50	struct snd_timer_user *tu;
 51	struct snd_timer_info32 info;
 52	struct snd_timer *t;
 53
 54	tu = file->private_data;
 55	if (!tu->timeri)
 56		return -EBADFD;
 57	t = tu->timeri->timer;
 58	if (!t)
 59		return -EBADFD;
 60	memset(&info, 0, sizeof(info));
 61	info.card = t->card ? t->card->number : -1;
 62	if (t->hw.flags & SNDRV_TIMER_HW_SLAVE)
 63		info.flags |= SNDRV_TIMER_FLG_SLAVE;
 64	strscpy(info.id, t->id, sizeof(info.id));
 65	strscpy(info.name, t->name, sizeof(info.name));
 66	info.resolution = t->hw.resolution;
 67	if (copy_to_user(_info, &info, sizeof(*_info)))
 68		return -EFAULT;
 69	return 0;
 70}
 71
 72enum {
 73	SNDRV_TIMER_IOCTL_GPARAMS32 = _IOW('T', 0x04, struct snd_timer_gparams32),
 74	SNDRV_TIMER_IOCTL_INFO32 = _IOR('T', 0x11, struct snd_timer_info32),
 75	SNDRV_TIMER_IOCTL_STATUS_COMPAT32 = _IOW('T', 0x14, struct snd_timer_status32),
 76	SNDRV_TIMER_IOCTL_STATUS_COMPAT64 = _IOW('T', 0x14, struct snd_timer_status64),
 77};
 78
 79static long __snd_timer_user_ioctl_compat(struct file *file, unsigned int cmd,
 80					  unsigned long arg)
 81{
 82	void __user *argp = compat_ptr(arg);
 83
 84	switch (cmd) {
 85	case SNDRV_TIMER_IOCTL_PVERSION:
 86	case SNDRV_TIMER_IOCTL_TREAD_OLD:
 87	case SNDRV_TIMER_IOCTL_TREAD64:
 88	case SNDRV_TIMER_IOCTL_GINFO:
 89	case SNDRV_TIMER_IOCTL_GSTATUS:
 90	case SNDRV_TIMER_IOCTL_SELECT:
 91	case SNDRV_TIMER_IOCTL_PARAMS:
 92	case SNDRV_TIMER_IOCTL_START:
 93	case SNDRV_TIMER_IOCTL_START_OLD:
 94	case SNDRV_TIMER_IOCTL_STOP:
 95	case SNDRV_TIMER_IOCTL_STOP_OLD:
 96	case SNDRV_TIMER_IOCTL_CONTINUE:
 97	case SNDRV_TIMER_IOCTL_CONTINUE_OLD:
 98	case SNDRV_TIMER_IOCTL_PAUSE:
 99	case SNDRV_TIMER_IOCTL_PAUSE_OLD:
100	case SNDRV_TIMER_IOCTL_NEXT_DEVICE:
101		return __snd_timer_user_ioctl(file, cmd, (unsigned long)argp, true);
102	case SNDRV_TIMER_IOCTL_GPARAMS32:
103		return snd_timer_user_gparams_compat(file, argp);
104	case SNDRV_TIMER_IOCTL_INFO32:
105		return snd_timer_user_info_compat(file, argp);
106	case SNDRV_TIMER_IOCTL_STATUS_COMPAT32:
107		return snd_timer_user_status32(file, argp);
108	case SNDRV_TIMER_IOCTL_STATUS_COMPAT64:
109		return snd_timer_user_status64(file, argp);
110	}
111	return -ENOIOCTLCMD;
112}
113
114static long snd_timer_user_ioctl_compat(struct file *file, unsigned int cmd,
115					unsigned long arg)
116{
117	struct snd_timer_user *tu = file->private_data;
 
118
119	guard(mutex)(&tu->ioctl_lock);
120	return __snd_timer_user_ioctl_compat(file, cmd, arg);
 
 
121}

  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 *   32bit -> 64bit ioctl wrapper for timer API
  4 *   Copyright (c) by Takashi Iwai <tiwai@suse.de>
  5 */
  6
  7/* This file included from timer.c */
  8
  9#include <linux/compat.h>
 10
 11/*
 12 * ILP32/LP64 has different size for 'long' type. Additionally, the size
 13 * of storage alignment differs depending on architectures. Here, '__packed'
 14 * qualifier is used so that the size of this structure is multiple of 4 and
 15 * it fits to any architectures with 32 bit storage alignment.
 16 */
 17struct snd_timer_gparams32 {
 18	struct snd_timer_id tid;
 19	u32 period_num;
 20	u32 period_den;
 21	unsigned char reserved[32];
 22} __packed;
 23
 24struct snd_timer_info32 {
 25	u32 flags;
 26	s32 card;
 27	unsigned char id[64];
 28	unsigned char name[80];
 29	u32 reserved0;
 30	u32 resolution;
 31	unsigned char reserved[64];
 32};
 33
 34static int snd_timer_user_gparams_compat(struct file *file,
 35					struct snd_timer_gparams32 __user *user)
 36{
 37	struct snd_timer_gparams gparams;
 38
 39	if (copy_from_user(&gparams.tid, &user->tid, sizeof(gparams.tid)) ||
 40	    get_user(gparams.period_num, &user->period_num) ||
 41	    get_user(gparams.period_den, &user->period_den))
 42		return -EFAULT;
 43
 44	return timer_set_gparams(&gparams);
 45}
 46
 47static int snd_timer_user_info_compat(struct file *file,
 48				      struct snd_timer_info32 __user *_info)
 49{
 50	struct snd_timer_user *tu;
 51	struct snd_timer_info32 info;
 52	struct snd_timer *t;
 53
 54	tu = file->private_data;
 55	if (!tu->timeri)
 56		return -EBADFD;
 57	t = tu->timeri->timer;
 58	if (!t)
 59		return -EBADFD;
 60	memset(&info, 0, sizeof(info));
 61	info.card = t->card ? t->card->number : -1;
 62	if (t->hw.flags & SNDRV_TIMER_HW_SLAVE)
 63		info.flags |= SNDRV_TIMER_FLG_SLAVE;
 64	strscpy(info.id, t->id, sizeof(info.id));
 65	strscpy(info.name, t->name, sizeof(info.name));
 66	info.resolution = t->hw.resolution;
 67	if (copy_to_user(_info, &info, sizeof(*_info)))
 68		return -EFAULT;
 69	return 0;
 70}
 71
 72enum {
 73	SNDRV_TIMER_IOCTL_GPARAMS32 = _IOW('T', 0x04, struct snd_timer_gparams32),
 74	SNDRV_TIMER_IOCTL_INFO32 = _IOR('T', 0x11, struct snd_timer_info32),
 75	SNDRV_TIMER_IOCTL_STATUS_COMPAT32 = _IOW('T', 0x14, struct snd_timer_status32),
 76	SNDRV_TIMER_IOCTL_STATUS_COMPAT64 = _IOW('T', 0x14, struct snd_timer_status64),
 77};
 78
 79static long __snd_timer_user_ioctl_compat(struct file *file, unsigned int cmd,
 80					  unsigned long arg)
 81{
 82	void __user *argp = compat_ptr(arg);
 83
 84	switch (cmd) {
 85	case SNDRV_TIMER_IOCTL_PVERSION:
 86	case SNDRV_TIMER_IOCTL_TREAD_OLD:
 87	case SNDRV_TIMER_IOCTL_TREAD64:
 88	case SNDRV_TIMER_IOCTL_GINFO:
 89	case SNDRV_TIMER_IOCTL_GSTATUS:
 90	case SNDRV_TIMER_IOCTL_SELECT:
 91	case SNDRV_TIMER_IOCTL_PARAMS:
 92	case SNDRV_TIMER_IOCTL_START:
 93	case SNDRV_TIMER_IOCTL_START_OLD:
 94	case SNDRV_TIMER_IOCTL_STOP:
 95	case SNDRV_TIMER_IOCTL_STOP_OLD:
 96	case SNDRV_TIMER_IOCTL_CONTINUE:
 97	case SNDRV_TIMER_IOCTL_CONTINUE_OLD:
 98	case SNDRV_TIMER_IOCTL_PAUSE:
 99	case SNDRV_TIMER_IOCTL_PAUSE_OLD:
100	case SNDRV_TIMER_IOCTL_NEXT_DEVICE:
101		return __snd_timer_user_ioctl(file, cmd, (unsigned long)argp, true);
102	case SNDRV_TIMER_IOCTL_GPARAMS32:
103		return snd_timer_user_gparams_compat(file, argp);
104	case SNDRV_TIMER_IOCTL_INFO32:
105		return snd_timer_user_info_compat(file, argp);
106	case SNDRV_TIMER_IOCTL_STATUS_COMPAT32:
107		return snd_timer_user_status32(file, argp);
108	case SNDRV_TIMER_IOCTL_STATUS_COMPAT64:
109		return snd_timer_user_status64(file, argp);
110	}
111	return -ENOIOCTLCMD;
112}
113
114static long snd_timer_user_ioctl_compat(struct file *file, unsigned int cmd,
115					unsigned long arg)
116{
117	struct snd_timer_user *tu = file->private_data;
118	long ret;
119
120	mutex_lock(&tu->ioctl_lock);
121	ret = __snd_timer_user_ioctl_compat(file, cmd, arg);
122	mutex_unlock(&tu->ioctl_lock);
123	return ret;
124}