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- // SPDX-License-Identifier: GPL-2.0-or-later
- /*
- * 32bit -> 64bit ioctl wrapper for timer API
- * Copyright (c) by Takashi Iwai <tiwai@suse.de>
- */
- /* This file included from timer.c */
- #include <linux/compat.h>
- /*
- * ILP32/LP64 has different size for 'long' type. Additionally, the size
- * of storage alignment differs depending on architectures. Here, '__packed'
- * qualifier is used so that the size of this structure is multiple of 4 and
- * it fits to any architectures with 32 bit storage alignment.
- */
- struct snd_timer_gparams32 {
- struct snd_timer_id tid;
- u32 period_num;
- u32 period_den;
- unsigned char reserved[32];
- } __packed;
- struct snd_timer_info32 {
- u32 flags;
- s32 card;
- unsigned char id[64];
- unsigned char name[80];
- u32 reserved0;
- u32 resolution;
- unsigned char reserved[64];
- };
- static int snd_timer_user_gparams_compat(struct file *file,
- struct snd_timer_gparams32 __user *user)
- {
- struct snd_timer_gparams gparams;
- if (copy_from_user(&gparams.tid, &user->tid, sizeof(gparams.tid)) ||
- get_user(gparams.period_num, &user->period_num) ||
- get_user(gparams.period_den, &user->period_den))
- return -EFAULT;
- return timer_set_gparams(&gparams);
- }
- static int snd_timer_user_info_compat(struct file *file,
- struct snd_timer_info32 __user *_info)
- {
- struct snd_timer_user *tu;
- struct snd_timer_info32 info;
- struct snd_timer *t;
- tu = file->private_data;
- if (!tu->timeri)
- return -EBADFD;
- t = tu->timeri->timer;
- if (!t)
- return -EBADFD;
- memset(&info, 0, sizeof(info));
- info.card = t->card ? t->card->number : -1;
- if (t->hw.flags & SNDRV_TIMER_HW_SLAVE)
- info.flags |= SNDRV_TIMER_FLG_SLAVE;
- strlcpy(info.id, t->id, sizeof(info.id));
- strlcpy(info.name, t->name, sizeof(info.name));
- info.resolution = t->hw.resolution;
- if (copy_to_user(_info, &info, sizeof(*_info)))
- return -EFAULT;
- return 0;
- }
- enum {
- SNDRV_TIMER_IOCTL_GPARAMS32 = _IOW('T', 0x04, struct snd_timer_gparams32),
- SNDRV_TIMER_IOCTL_INFO32 = _IOR('T', 0x11, struct snd_timer_info32),
- SNDRV_TIMER_IOCTL_STATUS_COMPAT32 = _IOW('T', 0x14, struct snd_timer_status32),
- SNDRV_TIMER_IOCTL_STATUS_COMPAT64 = _IOW('T', 0x14, struct snd_timer_status64),
- };
- static long __snd_timer_user_ioctl_compat(struct file *file, unsigned int cmd,
- unsigned long arg)
- {
- void __user *argp = compat_ptr(arg);
- switch (cmd) {
- case SNDRV_TIMER_IOCTL_PVERSION:
- case SNDRV_TIMER_IOCTL_TREAD_OLD:
- case SNDRV_TIMER_IOCTL_TREAD64:
- case SNDRV_TIMER_IOCTL_GINFO:
- case SNDRV_TIMER_IOCTL_GSTATUS:
- case SNDRV_TIMER_IOCTL_SELECT:
- case SNDRV_TIMER_IOCTL_PARAMS:
- case SNDRV_TIMER_IOCTL_START:
- case SNDRV_TIMER_IOCTL_START_OLD:
- case SNDRV_TIMER_IOCTL_STOP:
- case SNDRV_TIMER_IOCTL_STOP_OLD:
- case SNDRV_TIMER_IOCTL_CONTINUE:
- case SNDRV_TIMER_IOCTL_CONTINUE_OLD:
- case SNDRV_TIMER_IOCTL_PAUSE:
- case SNDRV_TIMER_IOCTL_PAUSE_OLD:
- case SNDRV_TIMER_IOCTL_NEXT_DEVICE:
- return __snd_timer_user_ioctl(file, cmd, (unsigned long)argp, true);
- case SNDRV_TIMER_IOCTL_GPARAMS32:
- return snd_timer_user_gparams_compat(file, argp);
- case SNDRV_TIMER_IOCTL_INFO32:
- return snd_timer_user_info_compat(file, argp);
- case SNDRV_TIMER_IOCTL_STATUS_COMPAT32:
- return snd_timer_user_status32(file, argp);
- case SNDRV_TIMER_IOCTL_STATUS_COMPAT64:
- return snd_timer_user_status64(file, argp);
- }
- return -ENOIOCTLCMD;
- }
- static long snd_timer_user_ioctl_compat(struct file *file, unsigned int cmd,
- unsigned long arg)
- {
- struct snd_timer_user *tu = file->private_data;
- long ret;
- mutex_lock(&tu->ioctl_lock);
- ret = __snd_timer_user_ioctl_compat(file, cmd, arg);
- mutex_unlock(&tu->ioctl_lock);
- return ret;
- }
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