502 lines
13 KiB
C
502 lines
13 KiB
C
/*
|
|
* compat ioctls for control 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 control.c */
|
|
|
|
#include <linux/compat.h>
|
|
#include <linux/slab.h>
|
|
|
|
struct snd_ctl_elem_list32 {
|
|
u32 offset;
|
|
u32 space;
|
|
u32 used;
|
|
u32 count;
|
|
u32 pids;
|
|
unsigned char reserved[50];
|
|
} /* don't set packed attribute here */;
|
|
|
|
static int snd_ctl_elem_list_compat(struct snd_card *card,
|
|
struct snd_ctl_elem_list32 __user *data32)
|
|
{
|
|
struct snd_ctl_elem_list __user *data;
|
|
compat_caddr_t ptr;
|
|
int err;
|
|
|
|
data = compat_alloc_user_space(sizeof(*data));
|
|
|
|
/* offset, space, used, count */
|
|
if (copy_in_user(data, data32, 4 * sizeof(u32)))
|
|
return -EFAULT;
|
|
/* pids */
|
|
if (get_user(ptr, &data32->pids) ||
|
|
put_user(compat_ptr(ptr), &data->pids))
|
|
return -EFAULT;
|
|
err = snd_ctl_elem_list(card, data);
|
|
if (err < 0)
|
|
return err;
|
|
/* copy the result */
|
|
if (copy_in_user(data32, data, 4 * sizeof(u32)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* control element info
|
|
* it uses union, so the things are not easy..
|
|
*/
|
|
|
|
struct snd_ctl_elem_info32 {
|
|
struct snd_ctl_elem_id id; // the size of struct is same
|
|
s32 type;
|
|
u32 access;
|
|
u32 count;
|
|
s32 owner;
|
|
union {
|
|
struct {
|
|
s32 min;
|
|
s32 max;
|
|
s32 step;
|
|
} integer;
|
|
struct {
|
|
u64 min;
|
|
u64 max;
|
|
u64 step;
|
|
} integer64;
|
|
struct {
|
|
u32 items;
|
|
u32 item;
|
|
char name[64];
|
|
u64 names_ptr;
|
|
u32 names_length;
|
|
} enumerated;
|
|
unsigned char reserved[128];
|
|
} value;
|
|
unsigned char reserved[64];
|
|
} __attribute__((packed));
|
|
|
|
static int snd_ctl_elem_info_compat(struct snd_ctl_file *ctl,
|
|
struct snd_ctl_elem_info32 __user *data32)
|
|
{
|
|
struct snd_ctl_elem_info *data;
|
|
int err;
|
|
|
|
data = kzalloc(sizeof(*data), GFP_KERNEL);
|
|
if (! data)
|
|
return -ENOMEM;
|
|
|
|
err = -EFAULT;
|
|
/* copy id */
|
|
if (copy_from_user(&data->id, &data32->id, sizeof(data->id)))
|
|
goto error;
|
|
/* we need to copy the item index.
|
|
* hope this doesn't break anything..
|
|
*/
|
|
if (get_user(data->value.enumerated.item, &data32->value.enumerated.item))
|
|
goto error;
|
|
|
|
err = snd_power_wait(ctl->card, SNDRV_CTL_POWER_D0);
|
|
if (err < 0)
|
|
goto error;
|
|
err = snd_ctl_elem_info(ctl, data);
|
|
if (err < 0)
|
|
goto error;
|
|
/* restore info to 32bit */
|
|
err = -EFAULT;
|
|
/* id, type, access, count */
|
|
if (copy_to_user(&data32->id, &data->id, sizeof(data->id)) ||
|
|
copy_to_user(&data32->type, &data->type, 3 * sizeof(u32)))
|
|
goto error;
|
|
if (put_user(data->owner, &data32->owner))
|
|
goto error;
|
|
switch (data->type) {
|
|
case SNDRV_CTL_ELEM_TYPE_BOOLEAN:
|
|
case SNDRV_CTL_ELEM_TYPE_INTEGER:
|
|
if (put_user(data->value.integer.min, &data32->value.integer.min) ||
|
|
put_user(data->value.integer.max, &data32->value.integer.max) ||
|
|
put_user(data->value.integer.step, &data32->value.integer.step))
|
|
goto error;
|
|
break;
|
|
case SNDRV_CTL_ELEM_TYPE_INTEGER64:
|
|
if (copy_to_user(&data32->value.integer64,
|
|
&data->value.integer64,
|
|
sizeof(data->value.integer64)))
|
|
goto error;
|
|
break;
|
|
case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
|
|
if (copy_to_user(&data32->value.enumerated,
|
|
&data->value.enumerated,
|
|
sizeof(data->value.enumerated)))
|
|
goto error;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
err = 0;
|
|
error:
|
|
kfree(data);
|
|
return err;
|
|
}
|
|
|
|
/* read / write */
|
|
struct snd_ctl_elem_value32 {
|
|
struct snd_ctl_elem_id id;
|
|
unsigned int indirect; /* bit-field causes misalignment */
|
|
union {
|
|
s32 integer[128];
|
|
unsigned char data[512];
|
|
#ifndef CONFIG_X86_64
|
|
s64 integer64[64];
|
|
#endif
|
|
} value;
|
|
unsigned char reserved[128];
|
|
};
|
|
|
|
#ifdef CONFIG_X86_X32
|
|
/* x32 has a different alignment for 64bit values from ia32 */
|
|
struct snd_ctl_elem_value_x32 {
|
|
struct snd_ctl_elem_id id;
|
|
unsigned int indirect; /* bit-field causes misalignment */
|
|
union {
|
|
s32 integer[128];
|
|
unsigned char data[512];
|
|
s64 integer64[64];
|
|
} value;
|
|
unsigned char reserved[128];
|
|
};
|
|
#endif /* CONFIG_X86_X32 */
|
|
|
|
/* get the value type and count of the control */
|
|
static int get_ctl_type(struct snd_card *card, struct snd_ctl_elem_id *id,
|
|
int *countp)
|
|
{
|
|
struct snd_kcontrol *kctl;
|
|
struct snd_ctl_elem_info *info;
|
|
int err;
|
|
|
|
down_read(&card->controls_rwsem);
|
|
kctl = snd_ctl_find_id(card, id);
|
|
if (! kctl) {
|
|
up_read(&card->controls_rwsem);
|
|
return -ENOENT;
|
|
}
|
|
info = kzalloc(sizeof(*info), GFP_KERNEL);
|
|
if (info == NULL) {
|
|
up_read(&card->controls_rwsem);
|
|
return -ENOMEM;
|
|
}
|
|
info->id = *id;
|
|
err = kctl->info(kctl, info);
|
|
up_read(&card->controls_rwsem);
|
|
if (err >= 0) {
|
|
err = info->type;
|
|
*countp = info->count;
|
|
}
|
|
kfree(info);
|
|
return err;
|
|
}
|
|
|
|
static int get_elem_size(int type, int count)
|
|
{
|
|
switch (type) {
|
|
case SNDRV_CTL_ELEM_TYPE_INTEGER64:
|
|
return sizeof(s64) * count;
|
|
case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
|
|
return sizeof(int) * count;
|
|
case SNDRV_CTL_ELEM_TYPE_BYTES:
|
|
return 512;
|
|
case SNDRV_CTL_ELEM_TYPE_IEC958:
|
|
return sizeof(struct snd_aes_iec958);
|
|
default:
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
static int copy_ctl_value_from_user(struct snd_card *card,
|
|
struct snd_ctl_elem_value *data,
|
|
void __user *userdata,
|
|
void __user *valuep,
|
|
int *typep, int *countp)
|
|
{
|
|
struct snd_ctl_elem_value32 __user *data32 = userdata;
|
|
int i, type, size;
|
|
int uninitialized_var(count);
|
|
unsigned int indirect;
|
|
|
|
if (copy_from_user(&data->id, &data32->id, sizeof(data->id)))
|
|
return -EFAULT;
|
|
if (get_user(indirect, &data32->indirect))
|
|
return -EFAULT;
|
|
if (indirect)
|
|
return -EINVAL;
|
|
type = get_ctl_type(card, &data->id, &count);
|
|
if (type < 0)
|
|
return type;
|
|
|
|
if (type == SNDRV_CTL_ELEM_TYPE_BOOLEAN ||
|
|
type == SNDRV_CTL_ELEM_TYPE_INTEGER) {
|
|
for (i = 0; i < count; i++) {
|
|
s32 __user *intp = valuep;
|
|
int val;
|
|
if (get_user(val, &intp[i]))
|
|
return -EFAULT;
|
|
data->value.integer.value[i] = val;
|
|
}
|
|
} else {
|
|
size = get_elem_size(type, count);
|
|
if (size < 0) {
|
|
dev_err(card->dev, "snd_ioctl32_ctl_elem_value: unknown type %d\n", type);
|
|
return -EINVAL;
|
|
}
|
|
if (copy_from_user(data->value.bytes.data, valuep, size))
|
|
return -EFAULT;
|
|
}
|
|
|
|
*typep = type;
|
|
*countp = count;
|
|
return 0;
|
|
}
|
|
|
|
/* restore the value to 32bit */
|
|
static int copy_ctl_value_to_user(void __user *userdata,
|
|
void __user *valuep,
|
|
struct snd_ctl_elem_value *data,
|
|
int type, int count)
|
|
{
|
|
int i, size;
|
|
|
|
if (type == SNDRV_CTL_ELEM_TYPE_BOOLEAN ||
|
|
type == SNDRV_CTL_ELEM_TYPE_INTEGER) {
|
|
for (i = 0; i < count; i++) {
|
|
s32 __user *intp = valuep;
|
|
int val;
|
|
val = data->value.integer.value[i];
|
|
if (put_user(val, &intp[i]))
|
|
return -EFAULT;
|
|
}
|
|
} else {
|
|
size = get_elem_size(type, count);
|
|
if (copy_to_user(valuep, data->value.bytes.data, size))
|
|
return -EFAULT;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int ctl_elem_read_user(struct snd_card *card,
|
|
void __user *userdata, void __user *valuep)
|
|
{
|
|
struct snd_ctl_elem_value *data;
|
|
int err, type, count;
|
|
|
|
data = kzalloc(sizeof(*data), GFP_KERNEL);
|
|
if (data == NULL)
|
|
return -ENOMEM;
|
|
|
|
err = copy_ctl_value_from_user(card, data, userdata, valuep,
|
|
&type, &count);
|
|
if (err < 0)
|
|
goto error;
|
|
|
|
err = snd_power_wait(card, SNDRV_CTL_POWER_D0);
|
|
if (err < 0)
|
|
goto error;
|
|
err = snd_ctl_elem_read(card, data);
|
|
if (err < 0)
|
|
goto error;
|
|
err = copy_ctl_value_to_user(userdata, valuep, data, type, count);
|
|
error:
|
|
kfree(data);
|
|
return err;
|
|
}
|
|
|
|
static int ctl_elem_write_user(struct snd_ctl_file *file,
|
|
void __user *userdata, void __user *valuep)
|
|
{
|
|
struct snd_ctl_elem_value *data;
|
|
struct snd_card *card = file->card;
|
|
int err, type, count;
|
|
|
|
data = kzalloc(sizeof(*data), GFP_KERNEL);
|
|
if (data == NULL)
|
|
return -ENOMEM;
|
|
|
|
err = copy_ctl_value_from_user(card, data, userdata, valuep,
|
|
&type, &count);
|
|
if (err < 0)
|
|
goto error;
|
|
|
|
err = snd_power_wait(card, SNDRV_CTL_POWER_D0);
|
|
if (err < 0)
|
|
goto error;
|
|
err = snd_ctl_elem_write(card, file, data);
|
|
if (err < 0)
|
|
goto error;
|
|
err = copy_ctl_value_to_user(userdata, valuep, data, type, count);
|
|
error:
|
|
kfree(data);
|
|
return err;
|
|
}
|
|
|
|
static int snd_ctl_elem_read_user_compat(struct snd_card *card,
|
|
struct snd_ctl_elem_value32 __user *data32)
|
|
{
|
|
return ctl_elem_read_user(card, data32, &data32->value);
|
|
}
|
|
|
|
static int snd_ctl_elem_write_user_compat(struct snd_ctl_file *file,
|
|
struct snd_ctl_elem_value32 __user *data32)
|
|
{
|
|
return ctl_elem_write_user(file, data32, &data32->value);
|
|
}
|
|
|
|
#ifdef CONFIG_X86_X32
|
|
static int snd_ctl_elem_read_user_x32(struct snd_card *card,
|
|
struct snd_ctl_elem_value_x32 __user *data32)
|
|
{
|
|
return ctl_elem_read_user(card, data32, &data32->value);
|
|
}
|
|
|
|
static int snd_ctl_elem_write_user_x32(struct snd_ctl_file *file,
|
|
struct snd_ctl_elem_value_x32 __user *data32)
|
|
{
|
|
return ctl_elem_write_user(file, data32, &data32->value);
|
|
}
|
|
#endif /* CONFIG_X86_X32 */
|
|
|
|
/* add or replace a user control */
|
|
static int snd_ctl_elem_add_compat(struct snd_ctl_file *file,
|
|
struct snd_ctl_elem_info32 __user *data32,
|
|
int replace)
|
|
{
|
|
struct snd_ctl_elem_info *data;
|
|
int err;
|
|
|
|
data = kzalloc(sizeof(*data), GFP_KERNEL);
|
|
if (! data)
|
|
return -ENOMEM;
|
|
|
|
err = -EFAULT;
|
|
/* id, type, access, count */ \
|
|
if (copy_from_user(&data->id, &data32->id, sizeof(data->id)) ||
|
|
copy_from_user(&data->type, &data32->type, 3 * sizeof(u32)))
|
|
goto error;
|
|
if (get_user(data->owner, &data32->owner))
|
|
goto error;
|
|
switch (data->type) {
|
|
case SNDRV_CTL_ELEM_TYPE_BOOLEAN:
|
|
case SNDRV_CTL_ELEM_TYPE_INTEGER:
|
|
if (get_user(data->value.integer.min, &data32->value.integer.min) ||
|
|
get_user(data->value.integer.max, &data32->value.integer.max) ||
|
|
get_user(data->value.integer.step, &data32->value.integer.step))
|
|
goto error;
|
|
break;
|
|
case SNDRV_CTL_ELEM_TYPE_INTEGER64:
|
|
if (copy_from_user(&data->value.integer64,
|
|
&data32->value.integer64,
|
|
sizeof(data->value.integer64)))
|
|
goto error;
|
|
break;
|
|
case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
|
|
if (copy_from_user(&data->value.enumerated,
|
|
&data32->value.enumerated,
|
|
sizeof(data->value.enumerated)))
|
|
goto error;
|
|
data->value.enumerated.names_ptr =
|
|
(uintptr_t)compat_ptr(data->value.enumerated.names_ptr);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
err = snd_ctl_elem_add(file, data, replace);
|
|
error:
|
|
kfree(data);
|
|
return err;
|
|
}
|
|
|
|
enum {
|
|
SNDRV_CTL_IOCTL_ELEM_LIST32 = _IOWR('U', 0x10, struct snd_ctl_elem_list32),
|
|
SNDRV_CTL_IOCTL_ELEM_INFO32 = _IOWR('U', 0x11, struct snd_ctl_elem_info32),
|
|
SNDRV_CTL_IOCTL_ELEM_READ32 = _IOWR('U', 0x12, struct snd_ctl_elem_value32),
|
|
SNDRV_CTL_IOCTL_ELEM_WRITE32 = _IOWR('U', 0x13, struct snd_ctl_elem_value32),
|
|
SNDRV_CTL_IOCTL_ELEM_ADD32 = _IOWR('U', 0x17, struct snd_ctl_elem_info32),
|
|
SNDRV_CTL_IOCTL_ELEM_REPLACE32 = _IOWR('U', 0x18, struct snd_ctl_elem_info32),
|
|
#ifdef CONFIG_X86_X32
|
|
SNDRV_CTL_IOCTL_ELEM_READ_X32 = _IOWR('U', 0x12, struct snd_ctl_elem_value_x32),
|
|
SNDRV_CTL_IOCTL_ELEM_WRITE_X32 = _IOWR('U', 0x13, struct snd_ctl_elem_value_x32),
|
|
#endif /* CONFIG_X86_X32 */
|
|
};
|
|
|
|
static inline long snd_ctl_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct snd_ctl_file *ctl;
|
|
struct snd_kctl_ioctl *p;
|
|
void __user *argp = compat_ptr(arg);
|
|
int err;
|
|
|
|
ctl = file->private_data;
|
|
if (snd_BUG_ON(!ctl || !ctl->card))
|
|
return -ENXIO;
|
|
|
|
switch (cmd) {
|
|
case SNDRV_CTL_IOCTL_PVERSION:
|
|
case SNDRV_CTL_IOCTL_CARD_INFO:
|
|
case SNDRV_CTL_IOCTL_SUBSCRIBE_EVENTS:
|
|
case SNDRV_CTL_IOCTL_POWER:
|
|
case SNDRV_CTL_IOCTL_POWER_STATE:
|
|
case SNDRV_CTL_IOCTL_ELEM_LOCK:
|
|
case SNDRV_CTL_IOCTL_ELEM_UNLOCK:
|
|
case SNDRV_CTL_IOCTL_ELEM_REMOVE:
|
|
case SNDRV_CTL_IOCTL_TLV_READ:
|
|
case SNDRV_CTL_IOCTL_TLV_WRITE:
|
|
case SNDRV_CTL_IOCTL_TLV_COMMAND:
|
|
return snd_ctl_ioctl(file, cmd, (unsigned long)argp);
|
|
case SNDRV_CTL_IOCTL_ELEM_LIST32:
|
|
return snd_ctl_elem_list_compat(ctl->card, argp);
|
|
case SNDRV_CTL_IOCTL_ELEM_INFO32:
|
|
return snd_ctl_elem_info_compat(ctl, argp);
|
|
case SNDRV_CTL_IOCTL_ELEM_READ32:
|
|
return snd_ctl_elem_read_user_compat(ctl->card, argp);
|
|
case SNDRV_CTL_IOCTL_ELEM_WRITE32:
|
|
return snd_ctl_elem_write_user_compat(ctl, argp);
|
|
case SNDRV_CTL_IOCTL_ELEM_ADD32:
|
|
return snd_ctl_elem_add_compat(ctl, argp, 0);
|
|
case SNDRV_CTL_IOCTL_ELEM_REPLACE32:
|
|
return snd_ctl_elem_add_compat(ctl, argp, 1);
|
|
#ifdef CONFIG_X86_X32
|
|
case SNDRV_CTL_IOCTL_ELEM_READ_X32:
|
|
return snd_ctl_elem_read_user_x32(ctl->card, argp);
|
|
case SNDRV_CTL_IOCTL_ELEM_WRITE_X32:
|
|
return snd_ctl_elem_write_user_x32(ctl, argp);
|
|
#endif /* CONFIG_X86_X32 */
|
|
}
|
|
|
|
down_read(&snd_ioctl_rwsem);
|
|
list_for_each_entry(p, &snd_control_compat_ioctls, list) {
|
|
if (p->fioctl) {
|
|
err = p->fioctl(ctl->card, ctl, cmd, arg);
|
|
if (err != -ENOIOCTLCMD) {
|
|
up_read(&snd_ioctl_rwsem);
|
|
return err;
|
|
}
|
|
}
|
|
}
|
|
up_read(&snd_ioctl_rwsem);
|
|
return -ENOIOCTLCMD;
|
|
}
|