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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
25/*
26 * ILP32/LP64 has different size for 'long' type. Additionally, the size
27 * of storage alignment differs depending on architectures. Here, '__packed'
28 * qualifier is used so that the size of this structure is multiple of 4 and
29 * it fits to any architectures with 32 bit storage alignment.
30 */
31struct snd_timer_gparams32 {
32 struct snd_timer_id tid;
33 u32 period_num;
34 u32 period_den;
35 unsigned char reserved[32];
36} __packed;
37
38struct snd_timer_info32 {
39 u32 flags;
40 s32 card;
41 unsigned char id[64];
42 unsigned char name[80];
43 u32 reserved0;
44 u32 resolution;
45 unsigned char reserved[64];
46};
47
48static int snd_timer_user_gparams_compat(struct file *file,
49 struct snd_timer_gparams32 __user *user)
50{
51 struct snd_timer_gparams gparams;
52
53 if (copy_from_user(&gparams.tid, &user->tid, sizeof(gparams.tid)) ||
54 get_user(gparams.period_num, &user->period_num) ||
55 get_user(gparams.period_den, &user->period_den))
56 return -EFAULT;
57
58 return timer_set_gparams(&gparams);
59}
60
61static int snd_timer_user_info_compat(struct file *file,
62 struct snd_timer_info32 __user *_info)
63{
64 struct snd_timer_user *tu;
65 struct snd_timer_info32 info;
66 struct snd_timer *t;
67
68 tu = file->private_data;
69 if (snd_BUG_ON(!tu->timeri))
70 return -ENXIO;
71 t = tu->timeri->timer;
72 if (snd_BUG_ON(!t))
73 return -ENXIO;
74 memset(&info, 0, sizeof(info));
75 info.card = t->card ? t->card->number : -1;
76 if (t->hw.flags & SNDRV_TIMER_HW_SLAVE)
77 info.flags |= SNDRV_TIMER_FLG_SLAVE;
78 strlcpy(info.id, t->id, sizeof(info.id));
79 strlcpy(info.name, t->name, sizeof(info.name));
80 info.resolution = t->hw.resolution;
81 if (copy_to_user(_info, &info, sizeof(*_info)))
82 return -EFAULT;
83 return 0;
84}
85
86struct snd_timer_status32 {
87 struct compat_timespec tstamp;
88 u32 resolution;
89 u32 lost;
90 u32 overrun;
91 u32 queue;
92 unsigned char reserved[64];
93};
94
95static int snd_timer_user_status_compat(struct file *file,
96 struct snd_timer_status32 __user *_status)
97{
98 struct snd_timer_user *tu;
99 struct snd_timer_status32 status;
100
101 tu = file->private_data;
102 if (snd_BUG_ON(!tu->timeri))
103 return -ENXIO;
104 memset(&status, 0, sizeof(status));
105 status.tstamp.tv_sec = tu->tstamp.tv_sec;
106 status.tstamp.tv_nsec = tu->tstamp.tv_nsec;
107 status.resolution = snd_timer_resolution(tu->timeri);
108 status.lost = tu->timeri->lost;
109 status.overrun = tu->overrun;
110 spin_lock_irq(&tu->qlock);
111 status.queue = tu->qused;
112 spin_unlock_irq(&tu->qlock);
113 if (copy_to_user(_status, &status, sizeof(status)))
114 return -EFAULT;
115 return 0;
116}
117
118#ifdef CONFIG_X86_X32
119/* X32 ABI has the same struct as x86-64 */
120#define snd_timer_user_status_x32(file, s) \
121 snd_timer_user_status(file, s)
122#endif /* CONFIG_X86_X32 */
123
124/*
125 */
126
127enum {
128 SNDRV_TIMER_IOCTL_GPARAMS32 = _IOW('T', 0x04, struct snd_timer_gparams32),
129 SNDRV_TIMER_IOCTL_INFO32 = _IOR('T', 0x11, struct snd_timer_info32),
130 SNDRV_TIMER_IOCTL_STATUS32 = _IOW('T', 0x14, struct snd_timer_status32),
131#ifdef CONFIG_X86_X32
132 SNDRV_TIMER_IOCTL_STATUS_X32 = _IOW('T', 0x14, struct snd_timer_status),
133#endif /* CONFIG_X86_X32 */
134};
135
136static long snd_timer_user_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
137{
138 void __user *argp = compat_ptr(arg);
139
140 switch (cmd) {
141 case SNDRV_TIMER_IOCTL_PVERSION:
142 case SNDRV_TIMER_IOCTL_TREAD:
143 case SNDRV_TIMER_IOCTL_GINFO:
144 case SNDRV_TIMER_IOCTL_GSTATUS:
145 case SNDRV_TIMER_IOCTL_SELECT:
146 case SNDRV_TIMER_IOCTL_PARAMS:
147 case SNDRV_TIMER_IOCTL_START:
148 case SNDRV_TIMER_IOCTL_START_OLD:
149 case SNDRV_TIMER_IOCTL_STOP:
150 case SNDRV_TIMER_IOCTL_STOP_OLD:
151 case SNDRV_TIMER_IOCTL_CONTINUE:
152 case SNDRV_TIMER_IOCTL_CONTINUE_OLD:
153 case SNDRV_TIMER_IOCTL_PAUSE:
154 case SNDRV_TIMER_IOCTL_PAUSE_OLD:
155 case SNDRV_TIMER_IOCTL_NEXT_DEVICE:
156 return snd_timer_user_ioctl(file, cmd, (unsigned long)argp);
157 case SNDRV_TIMER_IOCTL_GPARAMS32:
158 return snd_timer_user_gparams_compat(file, argp);
159 case SNDRV_TIMER_IOCTL_INFO32:
160 return snd_timer_user_info_compat(file, argp);
161 case SNDRV_TIMER_IOCTL_STATUS32:
162 return snd_timer_user_status_compat(file, argp);
163#ifdef CONFIG_X86_X32
164 case SNDRV_TIMER_IOCTL_STATUS_X32:
165 return snd_timer_user_status_x32(file, argp);
166#endif /* CONFIG_X86_X32 */
167 }
168 return -ENOIOCTLCMD;
169}
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 long ret;
119
120 mutex_lock(&tu->ioctl_lock);
121 ret = __snd_timer_user_ioctl_compat(file, cmd, arg);
122 mutex_unlock(&tu->ioctl_lock);
123 return ret;
124}