[thirdparty/linux.git] / sound / core / rawmidi_compat.c

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

/* This file included from rawmidi.c */

#include <linux/compat.h>

struct snd_rawmidi_params32 {
	s32 stream;
	u32 buffer_size;
	u32 avail_min;
	unsigned int no_active_sensing; /* avoid bit-field */
	unsigned char reserved[16];
} __attribute__((packed));

static int snd_rawmidi_ioctl_params_compat(struct snd_rawmidi_file *rfile,
					   struct snd_rawmidi_params32 __user *src)
{
	struct snd_rawmidi_params params;
	unsigned int val;

	if (get_user(params.stream, &src->stream) ||
	    get_user(params.buffer_size, &src->buffer_size) ||
	    get_user(params.avail_min, &src->avail_min) ||
	    get_user(val, &src->no_active_sensing))
		return -EFAULT;
	params.no_active_sensing = val;
	switch (params.stream) {
	case SNDRV_RAWMIDI_STREAM_OUTPUT:
		if (!rfile->output)
			return -EINVAL;
		return snd_rawmidi_output_params(rfile->output, &params);
	case SNDRV_RAWMIDI_STREAM_INPUT:
		if (!rfile->input)
			return -EINVAL;
		return snd_rawmidi_input_params(rfile->input, &params);
	}
	return -EINVAL;
}

struct snd_rawmidi_status32 {
	s32 stream;
	struct compat_timespec tstamp;
	u32 avail;
	u32 xruns;
	unsigned char reserved[16];
} __attribute__((packed));

static int snd_rawmidi_ioctl_status_compat(struct snd_rawmidi_file *rfile,
					   struct snd_rawmidi_status32 __user *src)
{
	int err;
	struct snd_rawmidi_status status;

	if (get_user(status.stream, &src->stream))
		return -EFAULT;

	switch (status.stream) {
	case SNDRV_RAWMIDI_STREAM_OUTPUT:
		if (!rfile->output)
			return -EINVAL;
		err = snd_rawmidi_output_status(rfile->output, &status);
		break;
	case SNDRV_RAWMIDI_STREAM_INPUT:
		if (!rfile->input)
			return -EINVAL;
		err = snd_rawmidi_input_status(rfile->input, &status);
		break;
	default:
		return -EINVAL;
	}
	if (err < 0)
		return err;

	if (compat_put_timespec(&status.tstamp, &src->tstamp) ||
	    put_user(status.avail, &src->avail) ||
	    put_user(status.xruns, &src->xruns))
		return -EFAULT;

	return 0;
}

#ifdef CONFIG_X86_X32
/* X32 ABI has 64bit timespec and 64bit alignment */
struct snd_rawmidi_status_x32 {
	s32 stream;
	u32 rsvd; /* alignment */
	struct timespec tstamp;
	u32 avail;
	u32 xruns;
	unsigned char reserved[16];
} __attribute__((packed));

#define put_timespec(src, dst) copy_to_user(dst, src, sizeof(*dst))

static int snd_rawmidi_ioctl_status_x32(struct snd_rawmidi_file *rfile,
					struct snd_rawmidi_status_x32 __user *src)
{
	int err;
	struct snd_rawmidi_status status;

	if (get_user(status.stream, &src->stream))
		return -EFAULT;

	switch (status.stream) {
	case SNDRV_RAWMIDI_STREAM_OUTPUT:
		if (!rfile->output)
			return -EINVAL;
		err = snd_rawmidi_output_status(rfile->output, &status);
		break;
	case SNDRV_RAWMIDI_STREAM_INPUT:
		if (!rfile->input)
			return -EINVAL;
		err = snd_rawmidi_input_status(rfile->input, &status);
		break;
	default:
		return -EINVAL;
	}
	if (err < 0)
		return err;

	if (put_timespec(&status.tstamp, &src->tstamp) ||
	    put_user(status.avail, &src->avail) ||
	    put_user(status.xruns, &src->xruns))
		return -EFAULT;

	return 0;
}
#endif /* CONFIG_X86_X32 */

enum {
	SNDRV_RAWMIDI_IOCTL_PARAMS32 = _IOWR('W', 0x10, struct snd_rawmidi_params32),
	SNDRV_RAWMIDI_IOCTL_STATUS32 = _IOWR('W', 0x20, struct snd_rawmidi_status32),
#ifdef CONFIG_X86_X32
	SNDRV_RAWMIDI_IOCTL_STATUS_X32 = _IOWR('W', 0x20, struct snd_rawmidi_status_x32),
#endif /* CONFIG_X86_X32 */
};

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

	rfile = file->private_data;
	switch (cmd) {
	case SNDRV_RAWMIDI_IOCTL_PVERSION:
	case SNDRV_RAWMIDI_IOCTL_INFO:
	case SNDRV_RAWMIDI_IOCTL_DROP:
	case SNDRV_RAWMIDI_IOCTL_DRAIN:
		return snd_rawmidi_ioctl(file, cmd, (unsigned long)argp);
	case SNDRV_RAWMIDI_IOCTL_PARAMS32:
		return snd_rawmidi_ioctl_params_compat(rfile, argp);
	case SNDRV_RAWMIDI_IOCTL_STATUS32:
		return snd_rawmidi_ioctl_status_compat(rfile, argp);
#ifdef CONFIG_X86_X32
	case SNDRV_RAWMIDI_IOCTL_STATUS_X32:
		return snd_rawmidi_ioctl_status_x32(rfile, argp);
#endif /* CONFIG_X86_X32 */
	}
	return -ENOIOCTLCMD;
}
Commit	Line	Data
1a59d1b8	1	// SPDX-License-Identifier: GPL-2.0-or-later
1da177e4 LT	2	/*
	3	* 32bit -> 64bit ioctl wrapper for raw MIDI API
	4	* Copyright (c) by Takashi Iwai <tiwai@suse.de>
1da177e4 LT	5	*/
	6
	7	/* This file included from rawmidi.c */
	8
	9	#include <linux/compat.h>
	10
48c9d417	11	struct snd_rawmidi_params32 {
1da177e4 LT	12	s32 stream;
	13	u32 buffer_size;
	14	u32 avail_min;
	15	unsigned int no_active_sensing; /* avoid bit-field */
	16	unsigned char reserved[16];
	17	} __attribute__((packed));
	18
48c9d417 TI	19	static int snd_rawmidi_ioctl_params_compat(struct snd_rawmidi_file *rfile,
48c9d417 TI	20	struct snd_rawmidi_params32 __user *src)
1da177e4	21	{
48c9d417	22	struct snd_rawmidi_params params;
1da177e4 LT	23	unsigned int val;
1da177e4 LT	24
1da177e4 LT	25	if (get_user(params.stream, &src->stream) \|\|
	26	get_user(params.buffer_size, &src->buffer_size) \|\|
	27	get_user(params.avail_min, &src->avail_min) \|\|
	28	get_user(val, &src->no_active_sensing))
	29	return -EFAULT;
	30	params.no_active_sensing = val;
	31	switch (params.stream) {
	32	case SNDRV_RAWMIDI_STREAM_OUTPUT:
8a56ef4f TI	33	if (!rfile->output)
8a56ef4f TI	34	return -EINVAL;
1da177e4 LT	35	return snd_rawmidi_output_params(rfile->output, &params);
1da177e4 LT	36	case SNDRV_RAWMIDI_STREAM_INPUT:
8a56ef4f TI	37	if (!rfile->input)
8a56ef4f TI	38	return -EINVAL;
1da177e4 LT	39	return snd_rawmidi_input_params(rfile->input, &params);
	40	}
	41	return -EINVAL;
	42	}
	43
48c9d417	44	struct snd_rawmidi_status32 {
1da177e4 LT	45	s32 stream;
	46	struct compat_timespec tstamp;
	47	u32 avail;
	48	u32 xruns;
	49	unsigned char reserved[16];
	50	} __attribute__((packed));
	51
48c9d417 TI	52	static int snd_rawmidi_ioctl_status_compat(struct snd_rawmidi_file *rfile,
48c9d417 TI	53	struct snd_rawmidi_status32 __user *src)
1da177e4 LT	54	{
1da177e4 LT	55	int err;
48c9d417	56	struct snd_rawmidi_status status;
1da177e4	57
1da177e4 LT	58	if (get_user(status.stream, &src->stream))
	59	return -EFAULT;
	60
	61	switch (status.stream) {
	62	case SNDRV_RAWMIDI_STREAM_OUTPUT:
8a56ef4f TI	63	if (!rfile->output)
8a56ef4f TI	64	return -EINVAL;
1da177e4 LT	65	err = snd_rawmidi_output_status(rfile->output, &status);
	66	break;
	67	case SNDRV_RAWMIDI_STREAM_INPUT:
8a56ef4f TI	68	if (!rfile->input)
8a56ef4f TI	69	return -EINVAL;
1da177e4 LT	70	err = snd_rawmidi_input_status(rfile->input, &status);
	71	break;
	72	default:
	73	return -EINVAL;
	74	}
	75	if (err < 0)
	76	return err;
	77
dd7e3f80	78	if (compat_put_timespec(&status.tstamp, &src->tstamp) \|\|
1da177e4 LT	79	put_user(status.avail, &src->avail) \|\|
	80	put_user(status.xruns, &src->xruns))
	81	return -EFAULT;
	82
	83	return 0;
	84	}
	85
2251fbbc TI	86	#ifdef CONFIG_X86_X32
	87	/* X32 ABI has 64bit timespec and 64bit alignment */
	88	struct snd_rawmidi_status_x32 {
	89	s32 stream;
	90	u32 rsvd; /* alignment */
	91	struct timespec tstamp;
	92	u32 avail;
	93	u32 xruns;
	94	unsigned char reserved[16];
	95	} __attribute__((packed));
	96
	97	#define put_timespec(src, dst) copy_to_user(dst, src, sizeof(*dst))
	98
	99	static int snd_rawmidi_ioctl_status_x32(struct snd_rawmidi_file *rfile,
	100	struct snd_rawmidi_status_x32 __user *src)
	101	{
	102	int err;
	103	struct snd_rawmidi_status status;
	104
2251fbbc TI	105	if (get_user(status.stream, &src->stream))
	106	return -EFAULT;
	107
	108	switch (status.stream) {
	109	case SNDRV_RAWMIDI_STREAM_OUTPUT:
8a56ef4f TI	110	if (!rfile->output)
8a56ef4f TI	111	return -EINVAL;
2251fbbc TI	112	err = snd_rawmidi_output_status(rfile->output, &status);
	113	break;
	114	case SNDRV_RAWMIDI_STREAM_INPUT:
8a56ef4f TI	115	if (!rfile->input)
8a56ef4f TI	116	return -EINVAL;
2251fbbc TI	117	err = snd_rawmidi_input_status(rfile->input, &status);
	118	break;
	119	default:
	120	return -EINVAL;
	121	}
	122	if (err < 0)
	123	return err;
	124
	125	if (put_timespec(&status.tstamp, &src->tstamp) \|\|
	126	put_user(status.avail, &src->avail) \|\|
	127	put_user(status.xruns, &src->xruns))
	128	return -EFAULT;
	129
	130	return 0;
	131	}
	132	#endif /* CONFIG_X86_X32 */
	133
1da177e4	134	enum {
48c9d417 TI	135	SNDRV_RAWMIDI_IOCTL_PARAMS32 = _IOWR('W', 0x10, struct snd_rawmidi_params32),
48c9d417 TI	136	SNDRV_RAWMIDI_IOCTL_STATUS32 = _IOWR('W', 0x20, struct snd_rawmidi_status32),
2251fbbc TI	137	#ifdef CONFIG_X86_X32
	138	SNDRV_RAWMIDI_IOCTL_STATUS_X32 = _IOWR('W', 0x20, struct snd_rawmidi_status_x32),
	139	#endif /* CONFIG_X86_X32 */
1da177e4 LT	140	};
	141
	142	static long snd_rawmidi_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
	143	{
48c9d417	144	struct snd_rawmidi_file *rfile;
1da177e4 LT	145	void __user *argp = compat_ptr(arg);
	146
	147	rfile = file->private_data;
	148	switch (cmd) {
	149	case SNDRV_RAWMIDI_IOCTL_PVERSION:
	150	case SNDRV_RAWMIDI_IOCTL_INFO:
	151	case SNDRV_RAWMIDI_IOCTL_DROP:
	152	case SNDRV_RAWMIDI_IOCTL_DRAIN:
	153	return snd_rawmidi_ioctl(file, cmd, (unsigned long)argp);
	154	case SNDRV_RAWMIDI_IOCTL_PARAMS32:
	155	return snd_rawmidi_ioctl_params_compat(rfile, argp);
	156	case SNDRV_RAWMIDI_IOCTL_STATUS32:
	157	return snd_rawmidi_ioctl_status_compat(rfile, argp);
2251fbbc TI	158	#ifdef CONFIG_X86_X32
	159	case SNDRV_RAWMIDI_IOCTL_STATUS_X32:
	160	return snd_rawmidi_ioctl_status_x32(rfile, argp);
	161	#endif /* CONFIG_X86_X32 */
1da177e4 LT	162	}
	163	return -ENOIOCTLCMD;
	164	}