diff options
Diffstat (limited to 'sound/core/timer_compat.c')
| -rw-r--r-- | sound/core/timer_compat.c | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/sound/core/timer_compat.c b/sound/core/timer_compat.c new file mode 100644 index 000000000..e00f7e399 --- /dev/null +++ b/sound/core/timer_compat.c @@ -0,0 +1,182 @@ +/* + * 32bit -> 64bit ioctl wrapper for timer API + * Copyright (c) by Takashi Iwai <tiwai@suse.de> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + */ + +/* 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; +} + +struct snd_timer_status32 { + struct compat_timespec tstamp; + u32 resolution; + u32 lost; + u32 overrun; + u32 queue; + unsigned char reserved[64]; +}; + +static int snd_timer_user_status_compat(struct file *file, + struct snd_timer_status32 __user *_status) +{ + struct snd_timer_user *tu; + struct snd_timer_status32 status; + + tu = file->private_data; + if (!tu->timeri) + return -EBADFD; + memset(&status, 0, sizeof(status)); + status.tstamp.tv_sec = tu->tstamp.tv_sec; + status.tstamp.tv_nsec = tu->tstamp.tv_nsec; + status.resolution = snd_timer_resolution(tu->timeri); + status.lost = tu->timeri->lost; + status.overrun = tu->overrun; + spin_lock_irq(&tu->qlock); + status.queue = tu->qused; + spin_unlock_irq(&tu->qlock); + if (copy_to_user(_status, &status, sizeof(status))) + return -EFAULT; + return 0; +} + +#ifdef CONFIG_X86_X32 +/* X32 ABI has the same struct as x86-64 */ +#define snd_timer_user_status_x32(file, s) \ + snd_timer_user_status(file, s) +#endif /* CONFIG_X86_X32 */ + +/* + */ + +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_STATUS32 = _IOW('T', 0x14, struct snd_timer_status32), +#ifdef CONFIG_X86_X32 + SNDRV_TIMER_IOCTL_STATUS_X32 = _IOW('T', 0x14, struct snd_timer_status), +#endif /* CONFIG_X86_X32 */ +}; + +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: + 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); + 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_STATUS32: + return snd_timer_user_status_compat(file, argp); +#ifdef CONFIG_X86_X32 + case SNDRV_TIMER_IOCTL_STATUS_X32: + return snd_timer_user_status_x32(file, argp); +#endif /* CONFIG_X86_X32 */ + } + 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; +} |