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b24e7ad1fd
X32 ABI takes the 64bit timespec, thus the timer user status ioctl becomes incompatible with IA32. This results in NOTTY error when the ioctl is issued. Meanwhile, this struct in X32 is essentially identical with the one in X86-64, so we can just bypassing to the existing code for this specific compat ioctl. Cc: <stable@vger.kernel.org> # v3.4+ Signed-off-by: Takashi Iwai <tiwai@suse.de>
142 lines
4.0 KiB
C
142 lines
4.0 KiB
C
/*
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* 32bit -> 64bit ioctl wrapper for timer API
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* Copyright (c) by Takashi Iwai <tiwai@suse.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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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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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_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 (snd_BUG_ON(!tu->timeri))
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return -ENXIO;
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t = tu->timeri->timer;
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if (snd_BUG_ON(!t))
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return -ENXIO;
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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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strlcpy(info.id, t->id, sizeof(info.id));
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strlcpy(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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struct snd_timer_status32 {
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struct compat_timespec tstamp;
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u32 resolution;
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u32 lost;
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u32 overrun;
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u32 queue;
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unsigned char reserved[64];
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};
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static int snd_timer_user_status_compat(struct file *file,
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struct snd_timer_status32 __user *_status)
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{
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struct snd_timer_user *tu;
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struct snd_timer_status32 status;
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tu = file->private_data;
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if (snd_BUG_ON(!tu->timeri))
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return -ENXIO;
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memset(&status, 0, sizeof(status));
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status.tstamp.tv_sec = tu->tstamp.tv_sec;
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status.tstamp.tv_nsec = tu->tstamp.tv_nsec;
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status.resolution = snd_timer_resolution(tu->timeri);
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status.lost = tu->timeri->lost;
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status.overrun = tu->overrun;
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spin_lock_irq(&tu->qlock);
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status.queue = tu->qused;
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spin_unlock_irq(&tu->qlock);
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if (copy_to_user(_status, &status, sizeof(status)))
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return -EFAULT;
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return 0;
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}
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#ifdef CONFIG_X86_X32
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/* X32 ABI has the same struct as x86-64 */
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#define snd_timer_user_status_x32(file, s) \
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snd_timer_user_status(file, s)
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#endif /* CONFIG_X86_X32 */
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/*
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*/
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enum {
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SNDRV_TIMER_IOCTL_INFO32 = _IOR('T', 0x11, struct snd_timer_info32),
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SNDRV_TIMER_IOCTL_STATUS32 = _IOW('T', 0x14, struct snd_timer_status32),
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#ifdef CONFIG_X86_X32
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SNDRV_TIMER_IOCTL_STATUS_X32 = _IOW('T', 0x14, struct snd_timer_status),
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#endif /* CONFIG_X86_X32 */
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};
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static long snd_timer_user_ioctl_compat(struct file *file, unsigned int cmd, 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:
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case SNDRV_TIMER_IOCTL_GINFO:
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case SNDRV_TIMER_IOCTL_GPARAMS:
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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);
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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_STATUS32:
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return snd_timer_user_status_compat(file, argp);
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#ifdef CONFIG_X86_X32
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case SNDRV_TIMER_IOCTL_STATUS_X32:
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return snd_timer_user_status_x32(file, argp);
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#endif /* CONFIG_X86_X32 */
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}
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return -ENOIOCTLCMD;
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}
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