// SPDX-License-Identifier: GPL-2.0-or-later/* * compat ioctls for control API * * Copyright (c) by Takashi Iwai <tiwai@suse.de> */ /* 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 data = {}; compat_caddr_t ptr; int err; /* offset, space, used, count */ if (copy_from_user(&data, data32, 4 * sizeof(u32))) return -EFAULT; /* pids */ if (get_user(ptr, &data32->pids)) return -EFAULT; data.pids = compat_ptr(ptr); err = snd_ctl_elem_list(card, &data); if (err < 0) return err; /* copy the result */ if (copy_to_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];} __packed; static int snd_ctl_elem_info_compat(struct snd_ctl_file *ctl, struct snd_ctl_elem_info32 __user *data32){ struct snd_card *card = ctl->card; int err; struct snd_ctl_elem_info *data __free(kfree) = kzalloc_obj(*data); if (! data) return -ENOMEM; /* copy id */ if (copy_from_user(&data->id, &data32->id, sizeof(data->id))) return -EFAULT; /* we need to copy the item index. * hope this doesn't break anything.. */ if (get_user(data->value.enumerated.item, &data32->value.enumerated.item)) return -EFAULT; err = snd_power_ref_and_wait(card); if (err < 0) return err; err = snd_ctl_elem_info(ctl, data); snd_power_unref(card); if (err < 0) return err; /* restore info to 32bit */ /* 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))) return -EFAULT; if (put_user(data->owner, &data32->owner)) return -EFAULT; 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)) return -EFAULT; break; case SNDRV_CTL_ELEM_TYPE_INTEGER64: if (copy_to_user(&data32->value.integer64, &data->value.integer64, sizeof(data->value.integer64))) return -EFAULT; break; case SNDRV_CTL_ELEM_TYPE_ENUMERATED: if (copy_to_user(&data32->value.enumerated, &data->value.enumerated, sizeof(data->value.enumerated))) return -EFAULT; break; default: break; } return 0;} /* 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_ABI/* 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_ABI */ /* 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; int err; guard(rwsem_read)(&card->controls_rwsem); kctl = snd_ctl_find_id(card, id); if (!kctl) return -ENOENT; struct snd_ctl_elem_info *info __free(kfree) = kzalloc_obj(*info); if (info == NULL) return -ENOMEM; info->id = *id; err = kctl->info(kctl, info); if (err >= 0) { err = info->type; *countp = info->count; } return err;} static int get_elem_size(snd_ctl_elem_type_t 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 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){ struct snd_ctl_elem_value32 __user *data32 = userdata; 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; } if (copy_to_user(&data32->id, &data->id, sizeof(data32->id))) return -EFAULT; return 0;} static int __ctl_elem_read_user(struct snd_card *card, void __user *userdata, void __user *valuep){ int err, type, count; struct snd_ctl_elem_value *data __free(kfree) = kzalloc_obj(*data); if (data == NULL) return -ENOMEM; err = copy_ctl_value_from_user(card, data, userdata, valuep, &type, &count); if (err < 0) return err; err = snd_ctl_elem_read(card, data); if (err < 0) return err; return copy_ctl_value_to_user(userdata, valuep, data, type, count);} static int ctl_elem_read_user(struct snd_card *card, void __user *userdata, void __user *valuep){ int err; err = snd_power_ref_and_wait(card); if (err < 0) return err; err = __ctl_elem_read_user(card, userdata, valuep); snd_power_unref(card); return err;} static int __ctl_elem_write_user(struct snd_ctl_file *file, void __user *userdata, void __user *valuep){ struct snd_card *card = file->card; int err, type, count; struct snd_ctl_elem_value *data __free(kfree) = kzalloc_obj(*data); if (data == NULL) return -ENOMEM; err = copy_ctl_value_from_user(card, data, userdata, valuep, &type, &count); if (err < 0) return err; err = snd_ctl_elem_write(card, file, data); if (err < 0) return err; return copy_ctl_value_to_user(userdata, valuep, data, type, count);} static int ctl_elem_write_user(struct snd_ctl_file *file, void __user *userdata, void __user *valuep){ struct snd_card *card = file->card; int err; err = snd_power_ref_and_wait(card); if (err < 0) return err; err = __ctl_elem_write_user(file, userdata, valuep); snd_power_unref(card); 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_ABIstatic 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_ABI */ /* 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 __free(kfree) = kzalloc_obj(*data); if (! data) return -ENOMEM; /* 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))) return -EFAULT; if (get_user(data->owner, &data32->owner)) return -EFAULT; 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)) return -EFAULT; break; case SNDRV_CTL_ELEM_TYPE_INTEGER64: if (copy_from_user(&data->value.integer64, &data32->value.integer64, sizeof(data->value.integer64))) return -EFAULT; break; case SNDRV_CTL_ELEM_TYPE_ENUMERATED: if (copy_from_user(&data->value.enumerated, &data32->value.enumerated, sizeof(data->value.enumerated))) return -EFAULT; data->value.enumerated.names_ptr = (uintptr_t)compat_ptr(data->value.enumerated.names_ptr); break; default: break; } return snd_ctl_elem_add(file, data, replace);} 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_ABI 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_ABI */}; 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_CARD_BYTES: 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_ABI 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_ABI */ } guard(rwsem_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) return err; } } return -ENOIOCTLCMD;}
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* compat ioctls for control API
*
* Copyright (c) by Takashi Iwai <tiwai@suse.de>
*/
/* 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 data = {};
compat_caddr_t ptr;
int err;
/* offset, space, used, count */
if (copy_from_user(&data, data32, 4 * sizeof(u32)))
return -EFAULT;
/* pids */
if (get_user(ptr, &data32->pids))
return -EFAULT;
data.pids = compat_ptr(ptr);
err = snd_ctl_elem_list(card, &data);
if (err < 0)
return err;
/* copy the result */
if (copy_to_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];
} __packed;
static int snd_ctl_elem_info_compat(struct snd_ctl_file *ctl,
struct snd_ctl_elem_info32 __user *data32)
{
struct snd_card *card = ctl->card;
int err;
struct snd_ctl_elem_info *data __free(kfree) =
kzalloc_obj(*data);
if (! data)
return -ENOMEM;
/* copy id */
if (copy_from_user(&data->id, &data32->id, sizeof(data->id)))
return -EFAULT;
/* we need to copy the item index.
* hope this doesn't break anything..
*/
if (get_user(data->value.enumerated.item, &data32->value.enumerated.item))
return -EFAULT;
err = snd_power_ref_and_wait(card);
if (err < 0)
return err;
err = snd_ctl_elem_info(ctl, data);
snd_power_unref(card);
if (err < 0)
return err;
/* restore info to 32bit */
/* 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)))
return -EFAULT;
if (put_user(data->owner, &data32->owner))
return -EFAULT;
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))
return -EFAULT;
break;
case SNDRV_CTL_ELEM_TYPE_INTEGER64:
if (copy_to_user(&data32->value.integer64,
&data->value.integer64,
sizeof(data->value.integer64)))
return -EFAULT;
break;
case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
if (copy_to_user(&data32->value.enumerated,
&data->value.enumerated,
sizeof(data->value.enumerated)))
return -EFAULT;
break;
default:
break;
}
return 0;
}
/* 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_ABI
/* 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_ABI */
/* 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;
int err;
guard(rwsem_read)(&card->controls_rwsem);
kctl = snd_ctl_find_id(card, id);
if (!kctl)
return -ENOENT;
struct snd_ctl_elem_info *info __free(kfree) =
kzalloc_obj(*info);
if (info == NULL)
return -ENOMEM;
info->id = *id;
err = kctl->info(kctl, info);
if (err >= 0) {
err = info->type;
*countp = info->count;
}
return err;
}
static int get_elem_size(snd_ctl_elem_type_t 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 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)
{
struct snd_ctl_elem_value32 __user *data32 = userdata;
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;
}
if (copy_to_user(&data32->id, &data->id, sizeof(data32->id)))
return -EFAULT;
return 0;
}
static int __ctl_elem_read_user(struct snd_card *card,
void __user *userdata, void __user *valuep)
{
int err, type, count;
struct snd_ctl_elem_value *data __free(kfree) =
kzalloc_obj(*data);
if (data == NULL)
return -ENOMEM;
err = copy_ctl_value_from_user(card, data, userdata, valuep,
&type, &count);
if (err < 0)
return err;
err = snd_ctl_elem_read(card, data);
if (err < 0)
return err;
return copy_ctl_value_to_user(userdata, valuep, data, type, count);
}
static int ctl_elem_read_user(struct snd_card *card,
void __user *userdata, void __user *valuep)
{
int err;
err = snd_power_ref_and_wait(card);
if (err < 0)
return err;
err = __ctl_elem_read_user(card, userdata, valuep);
snd_power_unref(card);
return err;
}
static int __ctl_elem_write_user(struct snd_ctl_file *file,
void __user *userdata, void __user *valuep)
{
struct snd_card *card = file->card;
int err, type, count;
struct snd_ctl_elem_value *data __free(kfree) =
kzalloc_obj(*data);
if (data == NULL)
return -ENOMEM;
err = copy_ctl_value_from_user(card, data, userdata, valuep,
&type, &count);
if (err < 0)
return err;
err = snd_ctl_elem_write(card, file, data);
if (err < 0)
return err;
return copy_ctl_value_to_user(userdata, valuep, data, type, count);
}
static int ctl_elem_write_user(struct snd_ctl_file *file,
void __user *userdata, void __user *valuep)
{
struct snd_card *card = file->card;
int err;
err = snd_power_ref_and_wait(card);
if (err < 0)
return err;
err = __ctl_elem_write_user(file, userdata, valuep);
snd_power_unref(card);
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_ABI
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_ABI */
/* 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 __free(kfree) =
kzalloc_obj(*data);
if (! data)
return -ENOMEM;
/* 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)))
return -EFAULT;
if (get_user(data->owner, &data32->owner))
return -EFAULT;
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))
return -EFAULT;
break;
case SNDRV_CTL_ELEM_TYPE_INTEGER64:
if (copy_from_user(&data->value.integer64,
&data32->value.integer64,
sizeof(data->value.integer64)))
return -EFAULT;
break;
case SNDRV_CTL_ELEM_TYPE_ENUMERATED:
if (copy_from_user(&data->value.enumerated,
&data32->value.enumerated,
sizeof(data->value.enumerated)))
return -EFAULT;
data->value.enumerated.names_ptr =
(uintptr_t)compat_ptr(data->value.enumerated.names_ptr);
break;
default:
break;
}
return snd_ctl_elem_add(file, data, replace);
}
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_ABI
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_ABI */
};
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_CARD_BYTES:
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_ABI
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_ABI */
}
guard(rwsem_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)
return err;
}
}
return -ENOIOCTLCMD;
}