Loading...
1/*
2 * 32bit -> 64bit ioctl wrapper for timer API
3 * Copyright (c) by Takashi Iwai <tiwai@suse.de>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 *
19 */
20
21/* This file included from timer.c */
22
23#include <linux/compat.h>
24
25struct snd_timer_info32 {
26 u32 flags;
27 s32 card;
28 unsigned char id[64];
29 unsigned char name[80];
30 u32 reserved0;
31 u32 resolution;
32 unsigned char reserved[64];
33};
34
35static int snd_timer_user_info_compat(struct file *file,
36 struct snd_timer_info32 __user *_info)
37{
38 struct snd_timer_user *tu;
39 struct snd_timer_info32 info;
40 struct snd_timer *t;
41
42 tu = file->private_data;
43 if (snd_BUG_ON(!tu->timeri))
44 return -ENXIO;
45 t = tu->timeri->timer;
46 if (snd_BUG_ON(!t))
47 return -ENXIO;
48 memset(&info, 0, sizeof(info));
49 info.card = t->card ? t->card->number : -1;
50 if (t->hw.flags & SNDRV_TIMER_HW_SLAVE)
51 info.flags |= SNDRV_TIMER_FLG_SLAVE;
52 strlcpy(info.id, t->id, sizeof(info.id));
53 strlcpy(info.name, t->name, sizeof(info.name));
54 info.resolution = t->hw.resolution;
55 if (copy_to_user(_info, &info, sizeof(*_info)))
56 return -EFAULT;
57 return 0;
58}
59
60struct snd_timer_status32 {
61 struct compat_timespec tstamp;
62 u32 resolution;
63 u32 lost;
64 u32 overrun;
65 u32 queue;
66 unsigned char reserved[64];
67};
68
69static int snd_timer_user_status_compat(struct file *file,
70 struct snd_timer_status32 __user *_status)
71{
72 struct snd_timer_user *tu;
73 struct snd_timer_status status;
74
75 tu = file->private_data;
76 if (snd_BUG_ON(!tu->timeri))
77 return -ENXIO;
78 memset(&status, 0, sizeof(status));
79 status.tstamp = tu->tstamp;
80 status.resolution = snd_timer_resolution(tu->timeri);
81 status.lost = tu->timeri->lost;
82 status.overrun = tu->overrun;
83 spin_lock_irq(&tu->qlock);
84 status.queue = tu->qused;
85 spin_unlock_irq(&tu->qlock);
86 if (copy_to_user(_status, &status, sizeof(status)))
87 return -EFAULT;
88 return 0;
89}
90
91/*
92 */
93
94enum {
95 SNDRV_TIMER_IOCTL_INFO32 = _IOR('T', 0x11, struct snd_timer_info32),
96 SNDRV_TIMER_IOCTL_STATUS32 = _IOW('T', 0x14, struct snd_timer_status32),
97};
98
99static long snd_timer_user_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
100{
101 void __user *argp = compat_ptr(arg);
102
103 switch (cmd) {
104 case SNDRV_TIMER_IOCTL_PVERSION:
105 case SNDRV_TIMER_IOCTL_TREAD:
106 case SNDRV_TIMER_IOCTL_GINFO:
107 case SNDRV_TIMER_IOCTL_GPARAMS:
108 case SNDRV_TIMER_IOCTL_GSTATUS:
109 case SNDRV_TIMER_IOCTL_SELECT:
110 case SNDRV_TIMER_IOCTL_PARAMS:
111 case SNDRV_TIMER_IOCTL_START:
112 case SNDRV_TIMER_IOCTL_START_OLD:
113 case SNDRV_TIMER_IOCTL_STOP:
114 case SNDRV_TIMER_IOCTL_STOP_OLD:
115 case SNDRV_TIMER_IOCTL_CONTINUE:
116 case SNDRV_TIMER_IOCTL_CONTINUE_OLD:
117 case SNDRV_TIMER_IOCTL_PAUSE:
118 case SNDRV_TIMER_IOCTL_PAUSE_OLD:
119 case SNDRV_TIMER_IOCTL_NEXT_DEVICE:
120 return snd_timer_user_ioctl(file, cmd, (unsigned long)argp);
121 case SNDRV_TIMER_IOCTL_INFO32:
122 return snd_timer_user_info_compat(file, argp);
123 case SNDRV_TIMER_IOCTL_STATUS32:
124 return snd_timer_user_status_compat(file, argp);
125 }
126 return -ENOIOCTLCMD;
127}
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * 32bit -> 64bit ioctl wrapper for timer API
4 * Copyright (c) by Takashi Iwai <tiwai@suse.de>
5 */
6
7/* This file included from timer.c */
8
9#include <linux/compat.h>
10
11/*
12 * ILP32/LP64 has different size for 'long' type. Additionally, the size
13 * of storage alignment differs depending on architectures. Here, '__packed'
14 * qualifier is used so that the size of this structure is multiple of 4 and
15 * it fits to any architectures with 32 bit storage alignment.
16 */
17struct snd_timer_gparams32 {
18 struct snd_timer_id tid;
19 u32 period_num;
20 u32 period_den;
21 unsigned char reserved[32];
22} __packed;
23
24struct snd_timer_info32 {
25 u32 flags;
26 s32 card;
27 unsigned char id[64];
28 unsigned char name[80];
29 u32 reserved0;
30 u32 resolution;
31 unsigned char reserved[64];
32};
33
34static int snd_timer_user_gparams_compat(struct file *file,
35 struct snd_timer_gparams32 __user *user)
36{
37 struct snd_timer_gparams gparams;
38
39 if (copy_from_user(&gparams.tid, &user->tid, sizeof(gparams.tid)) ||
40 get_user(gparams.period_num, &user->period_num) ||
41 get_user(gparams.period_den, &user->period_den))
42 return -EFAULT;
43
44 return timer_set_gparams(&gparams);
45}
46
47static int snd_timer_user_info_compat(struct file *file,
48 struct snd_timer_info32 __user *_info)
49{
50 struct snd_timer_user *tu;
51 struct snd_timer_info32 info;
52 struct snd_timer *t;
53
54 tu = file->private_data;
55 if (!tu->timeri)
56 return -EBADFD;
57 t = tu->timeri->timer;
58 if (!t)
59 return -EBADFD;
60 memset(&info, 0, sizeof(info));
61 info.card = t->card ? t->card->number : -1;
62 if (t->hw.flags & SNDRV_TIMER_HW_SLAVE)
63 info.flags |= SNDRV_TIMER_FLG_SLAVE;
64 strscpy(info.id, t->id, sizeof(info.id));
65 strscpy(info.name, t->name, sizeof(info.name));
66 info.resolution = t->hw.resolution;
67 if (copy_to_user(_info, &info, sizeof(*_info)))
68 return -EFAULT;
69 return 0;
70}
71
72enum {
73 SNDRV_TIMER_IOCTL_GPARAMS32 = _IOW('T', 0x04, struct snd_timer_gparams32),
74 SNDRV_TIMER_IOCTL_INFO32 = _IOR('T', 0x11, struct snd_timer_info32),
75 SNDRV_TIMER_IOCTL_STATUS_COMPAT32 = _IOW('T', 0x14, struct snd_timer_status32),
76 SNDRV_TIMER_IOCTL_STATUS_COMPAT64 = _IOW('T', 0x14, struct snd_timer_status64),
77};
78
79static long __snd_timer_user_ioctl_compat(struct file *file, unsigned int cmd,
80 unsigned long arg)
81{
82 void __user *argp = compat_ptr(arg);
83
84 switch (cmd) {
85 case SNDRV_TIMER_IOCTL_PVERSION:
86 case SNDRV_TIMER_IOCTL_TREAD_OLD:
87 case SNDRV_TIMER_IOCTL_TREAD64:
88 case SNDRV_TIMER_IOCTL_GINFO:
89 case SNDRV_TIMER_IOCTL_GSTATUS:
90 case SNDRV_TIMER_IOCTL_SELECT:
91 case SNDRV_TIMER_IOCTL_PARAMS:
92 case SNDRV_TIMER_IOCTL_START:
93 case SNDRV_TIMER_IOCTL_START_OLD:
94 case SNDRV_TIMER_IOCTL_STOP:
95 case SNDRV_TIMER_IOCTL_STOP_OLD:
96 case SNDRV_TIMER_IOCTL_CONTINUE:
97 case SNDRV_TIMER_IOCTL_CONTINUE_OLD:
98 case SNDRV_TIMER_IOCTL_PAUSE:
99 case SNDRV_TIMER_IOCTL_PAUSE_OLD:
100 case SNDRV_TIMER_IOCTL_NEXT_DEVICE:
101 return __snd_timer_user_ioctl(file, cmd, (unsigned long)argp, true);
102 case SNDRV_TIMER_IOCTL_GPARAMS32:
103 return snd_timer_user_gparams_compat(file, argp);
104 case SNDRV_TIMER_IOCTL_INFO32:
105 return snd_timer_user_info_compat(file, argp);
106 case SNDRV_TIMER_IOCTL_STATUS_COMPAT32:
107 return snd_timer_user_status32(file, argp);
108 case SNDRV_TIMER_IOCTL_STATUS_COMPAT64:
109 return snd_timer_user_status64(file, argp);
110 }
111 return -ENOIOCTLCMD;
112}
113
114static long snd_timer_user_ioctl_compat(struct file *file, unsigned int cmd,
115 unsigned long arg)
116{
117 struct snd_timer_user *tu = file->private_data;
118
119 guard(mutex)(&tu->ioctl_lock);
120 return __snd_timer_user_ioctl_compat(file, cmd, arg);
121}