[GitHub/mt8127/android_kernel_alcatel_ttab.git] / sound / core / rawmidi_compat.c

/*
 *   32bit -> 64bit ioctl wrapper for raw MIDI API
 *   Copyright (c) by Takashi Iwai <tiwai@suse.de>
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

/* 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 (rfile->output == NULL)
		return -EINVAL;
	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:
		return snd_rawmidi_output_params(rfile->output, &params);
	case SNDRV_RAWMIDI_STREAM_INPUT:
		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 (rfile->output == NULL)
		return -EINVAL;
	if (get_user(status.stream, &src->stream))
		return -EFAULT;

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

	if (put_user(status.tstamp.tv_sec, &src->tstamp.tv_sec) ||
	    put_user(status.tstamp.tv_nsec, &src->tstamp.tv_nsec) ||
	    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 (rfile->output == NULL)
		return -EINVAL;
	if (get_user(status.stream, &src->stream))
		return -EFAULT;

	switch (status.stream) {
	case SNDRV_RAWMIDI_STREAM_OUTPUT:
		err = snd_rawmidi_output_status(rfile->output, &status);
		break;
	case SNDRV_RAWMIDI_STREAM_INPUT:
		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
1da177e4 LT	1	/*
	2	* 32bit -> 64bit ioctl wrapper for raw MIDI API
	3	* Copyright (c) by Takashi Iwai <tiwai@suse.de>
	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
	7	* the Free Software Foundation; either version 2 of the License, or
	8	* (at your option) any later version.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program; if not, write to the Free Software
	17	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	18	*
	19	*/
	20
	21	/* This file included from rawmidi.c */
	22
	23	#include <linux/compat.h>
	24
48c9d417	25	struct snd_rawmidi_params32 {
1da177e4 LT	26	s32 stream;
	27	u32 buffer_size;
	28	u32 avail_min;
	29	unsigned int no_active_sensing; /* avoid bit-field */
	30	unsigned char reserved[16];
	31	} __attribute__((packed));
	32
48c9d417 TI	33	static int snd_rawmidi_ioctl_params_compat(struct snd_rawmidi_file *rfile,
48c9d417 TI	34	struct snd_rawmidi_params32 __user *src)
1da177e4	35	{
48c9d417	36	struct snd_rawmidi_params params;
1da177e4 LT	37	unsigned int val;
	38
	39	if (rfile->output == NULL)
	40	return -EINVAL;
	41	if (get_user(params.stream, &src->stream) \|\|
	42	get_user(params.buffer_size, &src->buffer_size) \|\|
	43	get_user(params.avail_min, &src->avail_min) \|\|
	44	get_user(val, &src->no_active_sensing))
	45	return -EFAULT;
	46	params.no_active_sensing = val;
	47	switch (params.stream) {
	48	case SNDRV_RAWMIDI_STREAM_OUTPUT:
	49	return snd_rawmidi_output_params(rfile->output, &params);
	50	case SNDRV_RAWMIDI_STREAM_INPUT:
	51	return snd_rawmidi_input_params(rfile->input, &params);
	52	}
	53	return -EINVAL;
	54	}
	55
48c9d417	56	struct snd_rawmidi_status32 {
1da177e4 LT	57	s32 stream;
	58	struct compat_timespec tstamp;
	59	u32 avail;
	60	u32 xruns;
	61	unsigned char reserved[16];
	62	} __attribute__((packed));
	63
48c9d417 TI	64	static int snd_rawmidi_ioctl_status_compat(struct snd_rawmidi_file *rfile,
48c9d417 TI	65	struct snd_rawmidi_status32 __user *src)
1da177e4 LT	66	{
1da177e4 LT	67	int err;
48c9d417	68	struct snd_rawmidi_status status;
1da177e4 LT	69
	70	if (rfile->output == NULL)
	71	return -EINVAL;
	72	if (get_user(status.stream, &src->stream))
	73	return -EFAULT;
	74
	75	switch (status.stream) {
	76	case SNDRV_RAWMIDI_STREAM_OUTPUT:
	77	err = snd_rawmidi_output_status(rfile->output, &status);
	78	break;
	79	case SNDRV_RAWMIDI_STREAM_INPUT:
	80	err = snd_rawmidi_input_status(rfile->input, &status);
	81	break;
	82	default:
	83	return -EINVAL;
	84	}
	85	if (err < 0)
	86	return err;
	87
	88	if (put_user(status.tstamp.tv_sec, &src->tstamp.tv_sec) \|\|
	89	put_user(status.tstamp.tv_nsec, &src->tstamp.tv_nsec) \|\|
	90	put_user(status.avail, &src->avail) \|\|
	91	put_user(status.xruns, &src->xruns))
	92	return -EFAULT;
	93
	94	return 0;
	95	}
	96
f6e85943 TI	97	#ifdef CONFIG_X86_X32
	98	/* X32 ABI has 64bit timespec and 64bit alignment */
	99	struct snd_rawmidi_status_x32 {
	100	s32 stream;
	101	u32 rsvd; /* alignment */
	102	struct timespec tstamp;
	103	u32 avail;
	104	u32 xruns;
	105	unsigned char reserved[16];
	106	} __attribute__((packed));
	107
	108	#define put_timespec(src, dst) copy_to_user(dst, src, sizeof(*dst))
	109
	110	static int snd_rawmidi_ioctl_status_x32(struct snd_rawmidi_file *rfile,
	111	struct snd_rawmidi_status_x32 __user *src)
	112	{
	113	int err;
	114	struct snd_rawmidi_status status;
	115
	116	if (rfile->output == NULL)
	117	return -EINVAL;
	118	if (get_user(status.stream, &src->stream))
	119	return -EFAULT;
	120
	121	switch (status.stream) {
	122	case SNDRV_RAWMIDI_STREAM_OUTPUT:
	123	err = snd_rawmidi_output_status(rfile->output, &status);
	124	break;
	125	case SNDRV_RAWMIDI_STREAM_INPUT:
	126	err = snd_rawmidi_input_status(rfile->input, &status);
	127	break;
	128	default:
	129	return -EINVAL;
	130	}
	131	if (err < 0)
	132	return err;
	133
	134	if (put_timespec(&status.tstamp, &src->tstamp) \|\|
	135	put_user(status.avail, &src->avail) \|\|
	136	put_user(status.xruns, &src->xruns))
	137	return -EFAULT;
	138
	139	return 0;
	140	}
	141	#endif /* CONFIG_X86_X32 */
	142
1da177e4	143	enum {
48c9d417 TI	144	SNDRV_RAWMIDI_IOCTL_PARAMS32 = _IOWR('W', 0x10, struct snd_rawmidi_params32),
48c9d417 TI	145	SNDRV_RAWMIDI_IOCTL_STATUS32 = _IOWR('W', 0x20, struct snd_rawmidi_status32),
f6e85943 TI	146	#ifdef CONFIG_X86_X32
	147	SNDRV_RAWMIDI_IOCTL_STATUS_X32 = _IOWR('W', 0x20, struct snd_rawmidi_status_x32),
	148	#endif /* CONFIG_X86_X32 */
1da177e4 LT	149	};
	150
	151	static long snd_rawmidi_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
	152	{
48c9d417	153	struct snd_rawmidi_file *rfile;
1da177e4 LT	154	void __user *argp = compat_ptr(arg);
	155
	156	rfile = file->private_data;
	157	switch (cmd) {
	158	case SNDRV_RAWMIDI_IOCTL_PVERSION:
	159	case SNDRV_RAWMIDI_IOCTL_INFO:
	160	case SNDRV_RAWMIDI_IOCTL_DROP:
	161	case SNDRV_RAWMIDI_IOCTL_DRAIN:
	162	return snd_rawmidi_ioctl(file, cmd, (unsigned long)argp);
	163	case SNDRV_RAWMIDI_IOCTL_PARAMS32:
	164	return snd_rawmidi_ioctl_params_compat(rfile, argp);
	165	case SNDRV_RAWMIDI_IOCTL_STATUS32:
	166	return snd_rawmidi_ioctl_status_compat(rfile, argp);
f6e85943 TI	167	#ifdef CONFIG_X86_X32
	168	case SNDRV_RAWMIDI_IOCTL_STATUS_X32:
	169	return snd_rawmidi_ioctl_status_x32(rfile, argp);
	170	#endif /* CONFIG_X86_X32 */
1da177e4 LT	171	}
	172	return -ENOIOCTLCMD;
	173	}