// 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; }