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