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- #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];
- } ;
- 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));
-
- if (copy_in_user(data, data32, 4 * sizeof(u32)))
- return -EFAULT;
-
- 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;
-
- if (copy_in_user(data32, data, 4 * sizeof(u32)))
- return -EFAULT;
- return 0;
- }
- struct snd_ctl_elem_info32 {
- struct snd_ctl_elem_id id;
- 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;
-
- if (copy_from_user(&data->id, &data32->id, sizeof(data->id)))
- goto error;
-
- if (get_user(data->value.enumerated.item, &data32->value.enumerated.item))
- goto error;
- snd_power_lock(ctl->card);
- err = snd_power_wait(ctl->card, SNDRV_CTL_POWER_D0);
- if (err >= 0)
- err = snd_ctl_elem_info(ctl, data);
- snd_power_unlock(ctl->card);
- if (err < 0)
- goto error;
-
- err = -EFAULT;
-
- 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;
- }
- struct snd_ctl_elem_value32 {
- struct snd_ctl_elem_id id;
- unsigned int indirect;
- union {
- s32 integer[128];
- unsigned char data[512];
- #ifndef CONFIG_X86_64
- s64 integer64[64];
- #endif
- } value;
- unsigned char reserved[128];
- };
- 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 -ENXIO;
- }
- 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,
- struct snd_ctl_elem_value32 __user *data32,
- int *typep, int *countp)
- {
- 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++) {
- int val;
- if (get_user(val, &data32->value.integer[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,
- data32->value.data, size))
- return -EFAULT;
- }
- *typep = type;
- *countp = count;
- return 0;
- }
- static int copy_ctl_value_to_user(struct snd_ctl_elem_value32 __user *data32,
- 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++) {
- int val;
- val = data->value.integer.value[i];
- if (put_user(val, &data32->value.integer[i]))
- return -EFAULT;
- }
- } else {
- size = get_elem_size(type, count);
- if (copy_to_user(data32->value.data,
- data->value.bytes.data, size))
- return -EFAULT;
- }
- return 0;
- }
- static int snd_ctl_elem_read_user_compat(struct snd_card *card,
- struct snd_ctl_elem_value32 __user *data32)
- {
- struct snd_ctl_elem_value *data;
- int err, type, count;
- data = kzalloc(sizeof(*data), GFP_KERNEL);
- if (data == NULL)
- return -ENOMEM;
- if ((err = copy_ctl_value_from_user(card, data, data32, &type, &count)) < 0)
- goto error;
- snd_power_lock(card);
- err = snd_power_wait(card, SNDRV_CTL_POWER_D0);
- if (err >= 0)
- err = snd_ctl_elem_read(card, data);
- snd_power_unlock(card);
- if (err >= 0)
- err = copy_ctl_value_to_user(data32, data, type, count);
- error:
- kfree(data);
- return err;
- }
- static int snd_ctl_elem_write_user_compat(struct snd_ctl_file *file,
- struct snd_ctl_elem_value32 __user *data32)
- {
- 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;
- if ((err = copy_ctl_value_from_user(card, data, data32, &type, &count)) < 0)
- goto error;
- snd_power_lock(card);
- err = snd_power_wait(card, SNDRV_CTL_POWER_D0);
- if (err >= 0)
- err = snd_ctl_elem_write(card, file, data);
- snd_power_unlock(card);
- if (err >= 0)
- err = copy_ctl_value_to_user(data32, data, type, count);
- error:
- kfree(data);
- return err;
- }
- 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;
- \
- 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) ||
- get_user(data->type, &data32->type))
- 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),
- };
- 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);
- }
- 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;
- }
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