[linux-2.6-block.git] / sound / core / timer_compat.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *   32bit -> 64bit ioctl wrapper for timer API
 *   Copyright (c) by Takashi Iwai <tiwai@suse.de>
 */

/* This file included from timer.c */

#include <linux/compat.h>

/*
 * ILP32/LP64 has different size for 'long' type. Additionally, the size
 * of storage alignment differs depending on architectures. Here, '__packed'
 * qualifier is used so that the size of this structure is multiple of 4 and
 * it fits to any architectures with 32 bit storage alignment.
 */
struct snd_timer_gparams32 {
	struct snd_timer_id tid;
	u32 period_num;
	u32 period_den;
	unsigned char reserved[32];
} __packed;

struct snd_timer_info32 {
	u32 flags;
	s32 card;
	unsigned char id[64];
	unsigned char name[80];
	u32 reserved0;
	u32 resolution;
	unsigned char reserved[64];
};

static int snd_timer_user_gparams_compat(struct file *file,
					struct snd_timer_gparams32 __user *user)
{
	struct snd_timer_gparams gparams;

	if (copy_from_user(&gparams.tid, &user->tid, sizeof(gparams.tid)) ||
	    get_user(gparams.period_num, &user->period_num) ||
	    get_user(gparams.period_den, &user->period_den))
		return -EFAULT;

	return timer_set_gparams(&gparams);
}

static int snd_timer_user_info_compat(struct file *file,
				      struct snd_timer_info32 __user *_info)
{
	struct snd_timer_user *tu;
	struct snd_timer_info32 info;
	struct snd_timer *t;

	tu = file->private_data;
	if (!tu->timeri)
		return -EBADFD;
	t = tu->timeri->timer;
	if (!t)
		return -EBADFD;
	memset(&info, 0, sizeof(info));
	info.card = t->card ? t->card->number : -1;
	if (t->hw.flags & SNDRV_TIMER_HW_SLAVE)
		info.flags |= SNDRV_TIMER_FLG_SLAVE;
	strlcpy(info.id, t->id, sizeof(info.id));
	strlcpy(info.name, t->name, sizeof(info.name));
	info.resolution = t->hw.resolution;
	if (copy_to_user(_info, &info, sizeof(*_info)))
		return -EFAULT;
	return 0;
}

struct snd_timer_status32 {
	struct compat_timespec tstamp;
	u32 resolution;
	u32 lost;
	u32 overrun;
	u32 queue;
	unsigned char reserved[64];
};

static int snd_timer_user_status_compat(struct file *file,
					struct snd_timer_status32 __user *_status)
{
	struct snd_timer_user *tu;
	struct snd_timer_status32 status;
	
	tu = file->private_data;
	if (!tu->timeri)
		return -EBADFD;
	memset(&status, 0, sizeof(status));
	status.tstamp.tv_sec = tu->tstamp.tv_sec;
	status.tstamp.tv_nsec = tu->tstamp.tv_nsec;
	status.resolution = snd_timer_resolution(tu->timeri);
	status.lost = tu->timeri->lost;
	status.overrun = tu->overrun;
	spin_lock_irq(&tu->qlock);
	status.queue = tu->qused;
	spin_unlock_irq(&tu->qlock);
	if (copy_to_user(_status, &status, sizeof(status)))
		return -EFAULT;
	return 0;
}

#ifdef CONFIG_X86_X32
/* X32 ABI has the same struct as x86-64 */
#define snd_timer_user_status_x32(file, s) \
	snd_timer_user_status(file, s)
#endif /* CONFIG_X86_X32 */

/*
 */

enum {
	SNDRV_TIMER_IOCTL_GPARAMS32 = _IOW('T', 0x04, struct snd_timer_gparams32),
	SNDRV_TIMER_IOCTL_INFO32 = _IOR('T', 0x11, struct snd_timer_info32),
	SNDRV_TIMER_IOCTL_STATUS32 = _IOW('T', 0x14, struct snd_timer_status32),
#ifdef CONFIG_X86_X32
	SNDRV_TIMER_IOCTL_STATUS_X32 = _IOW('T', 0x14, struct snd_timer_status),
#endif /* CONFIG_X86_X32 */
};

static long __snd_timer_user_ioctl_compat(struct file *file, unsigned int cmd,
					  unsigned long arg)
{
	void __user *argp = compat_ptr(arg);

	switch (cmd) {
	case SNDRV_TIMER_IOCTL_PVERSION:
	case SNDRV_TIMER_IOCTL_TREAD:
	case SNDRV_TIMER_IOCTL_GINFO:
	case SNDRV_TIMER_IOCTL_GSTATUS:
	case SNDRV_TIMER_IOCTL_SELECT:
	case SNDRV_TIMER_IOCTL_PARAMS:
	case SNDRV_TIMER_IOCTL_START:
	case SNDRV_TIMER_IOCTL_START_OLD:
	case SNDRV_TIMER_IOCTL_STOP:
	case SNDRV_TIMER_IOCTL_STOP_OLD:
	case SNDRV_TIMER_IOCTL_CONTINUE:
	case SNDRV_TIMER_IOCTL_CONTINUE_OLD:
	case SNDRV_TIMER_IOCTL_PAUSE:
	case SNDRV_TIMER_IOCTL_PAUSE_OLD:
	case SNDRV_TIMER_IOCTL_NEXT_DEVICE:
		return __snd_timer_user_ioctl(file, cmd, (unsigned long)argp);
	case SNDRV_TIMER_IOCTL_GPARAMS32:
		return snd_timer_user_gparams_compat(file, argp);
	case SNDRV_TIMER_IOCTL_INFO32:
		return snd_timer_user_info_compat(file, argp);
	case SNDRV_TIMER_IOCTL_STATUS32:
		return snd_timer_user_status_compat(file, argp);
#ifdef CONFIG_X86_X32
	case SNDRV_TIMER_IOCTL_STATUS_X32:
		return snd_timer_user_status_x32(file, argp);
#endif /* CONFIG_X86_X32 */
	}
	return -ENOIOCTLCMD;
}

static long snd_timer_user_ioctl_compat(struct file *file, unsigned int cmd,
					unsigned long arg)
{
	struct snd_timer_user *tu = file->private_data;
	long ret;

	mutex_lock(&tu->ioctl_lock);
	ret = __snd_timer_user_ioctl_compat(file, cmd, arg);
	mutex_unlock(&tu->ioctl_lock);
	return ret;
}
Commit	Line	Data
1a59d1b8	1	// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4 LT	2	/*
	3	* 32bit -> 64bit ioctl wrapper for timer API
	4	* Copyright (c) by Takashi Iwai <tiwai@suse.de>
1da177e4 LT	5	*/
	6
	7	/* This file included from timer.c */
	8
	9	#include <linux/compat.h>
	10
91d2178e TS	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	*/
	17	struct 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
53d2f744	24	struct snd_timer_info32 {
1da177e4 LT	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
91d2178e TS	34	static 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
1da177e4	47	static int snd_timer_user_info_compat(struct file *file,
53d2f744	48	struct snd_timer_info32 __user *_info)
1da177e4	49	{
53d2f744 TI	50	struct snd_timer_user *tu;
	51	struct snd_timer_info32 info;
	52	struct snd_timer *t;
1da177e4 LT	53
1da177e4 LT	54	tu = file->private_data;
3d4e8303 TI	55	if (!tu->timeri)
3d4e8303 TI	56	return -EBADFD;
1da177e4	57	t = tu->timeri->timer;
3d4e8303 TI	58	if (!t)
3d4e8303 TI	59	return -EBADFD;
1da177e4 LT	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	strlcpy(info.id, t->id, sizeof(info.id));
	65	strlcpy(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
53d2f744	72	struct snd_timer_status32 {
1da177e4 LT	73	struct compat_timespec tstamp;
	74	u32 resolution;
	75	u32 lost;
	76	u32 overrun;
	77	u32 queue;
	78	unsigned char reserved[64];
	79	};
	80
	81	static int snd_timer_user_status_compat(struct file *file,
53d2f744	82	struct snd_timer_status32 __user *_status)
1da177e4	83	{
53d2f744	84	struct snd_timer_user *tu;
3a72494a	85	struct snd_timer_status32 status;
1da177e4 LT	86
1da177e4 LT	87	tu = file->private_data;
3d4e8303 TI	88	if (!tu->timeri)
3d4e8303 TI	89	return -EBADFD;
1da177e4	90	memset(&status, 0, sizeof(status));
3a72494a TI	91	status.tstamp.tv_sec = tu->tstamp.tv_sec;
3a72494a TI	92	status.tstamp.tv_nsec = tu->tstamp.tv_nsec;
1da177e4 LT	93	status.resolution = snd_timer_resolution(tu->timeri);
	94	status.lost = tu->timeri->lost;
	95	status.overrun = tu->overrun;
	96	spin_lock_irq(&tu->qlock);
	97	status.queue = tu->qused;
	98	spin_unlock_irq(&tu->qlock);
	99	if (copy_to_user(_status, &status, sizeof(status)))
	100	return -EFAULT;
	101	return 0;
	102	}
	103
b24e7ad1 TI	104	#ifdef CONFIG_X86_X32
	105	/* X32 ABI has the same struct as x86-64 */
	106	#define snd_timer_user_status_x32(file, s) \
	107	snd_timer_user_status(file, s)
	108	#endif /* CONFIG_X86_X32 */
	109
1da177e4 LT	110	/*
	111	*/
	112
	113	enum {
91d2178e	114	SNDRV_TIMER_IOCTL_GPARAMS32 = _IOW('T', 0x04, struct snd_timer_gparams32),
53d2f744 TI	115	SNDRV_TIMER_IOCTL_INFO32 = _IOR('T', 0x11, struct snd_timer_info32),
53d2f744 TI	116	SNDRV_TIMER_IOCTL_STATUS32 = _IOW('T', 0x14, struct snd_timer_status32),
b24e7ad1 TI	117	#ifdef CONFIG_X86_X32
	118	SNDRV_TIMER_IOCTL_STATUS_X32 = _IOW('T', 0x14, struct snd_timer_status),
	119	#endif /* CONFIG_X86_X32 */
1da177e4 LT	120	};
1da177e4 LT	121
79fb0518 TI	122	static long __snd_timer_user_ioctl_compat(struct file *file, unsigned int cmd,
79fb0518 TI	123	unsigned long arg)
1da177e4 LT	124	{
	125	void __user *argp = compat_ptr(arg);
	126
	127	switch (cmd) {
	128	case SNDRV_TIMER_IOCTL_PVERSION:
	129	case SNDRV_TIMER_IOCTL_TREAD:
	130	case SNDRV_TIMER_IOCTL_GINFO:
1da177e4 LT	131	case SNDRV_TIMER_IOCTL_GSTATUS:
	132	case SNDRV_TIMER_IOCTL_SELECT:
	133	case SNDRV_TIMER_IOCTL_PARAMS:
	134	case SNDRV_TIMER_IOCTL_START:
8c50b37c	135	case SNDRV_TIMER_IOCTL_START_OLD:
1da177e4	136	case SNDRV_TIMER_IOCTL_STOP:
8c50b37c	137	case SNDRV_TIMER_IOCTL_STOP_OLD:
1da177e4	138	case SNDRV_TIMER_IOCTL_CONTINUE:
8c50b37c	139	case SNDRV_TIMER_IOCTL_CONTINUE_OLD:
15790a6b	140	case SNDRV_TIMER_IOCTL_PAUSE:
8c50b37c	141	case SNDRV_TIMER_IOCTL_PAUSE_OLD:
1da177e4	142	case SNDRV_TIMER_IOCTL_NEXT_DEVICE:
79fb0518	143	return __snd_timer_user_ioctl(file, cmd, (unsigned long)argp);
91d2178e TS	144	case SNDRV_TIMER_IOCTL_GPARAMS32:
91d2178e TS	145	return snd_timer_user_gparams_compat(file, argp);
1da177e4 LT	146	case SNDRV_TIMER_IOCTL_INFO32:
	147	return snd_timer_user_info_compat(file, argp);
	148	case SNDRV_TIMER_IOCTL_STATUS32:
	149	return snd_timer_user_status_compat(file, argp);
b24e7ad1 TI	150	#ifdef CONFIG_X86_X32
	151	case SNDRV_TIMER_IOCTL_STATUS_X32:
	152	return snd_timer_user_status_x32(file, argp);
	153	#endif /* CONFIG_X86_X32 */
1da177e4 LT	154	}
	155	return -ENOIOCTLCMD;
	156	}
79fb0518 TI	157
	158	static long snd_timer_user_ioctl_compat(struct file *file, unsigned int cmd,
	159	unsigned long arg)
	160	{
	161	struct snd_timer_user *tu = file->private_data;
	162	long ret;
	163
	164	mutex_lock(&tu->ioctl_lock);
	165	ret = __snd_timer_user_ioctl_compat(file, cmd, arg);
	166	mutex_unlock(&tu->ioctl_lock);
	167	return ret;
	168	}