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seq_compat.c
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1 /*
2  * 32bit -> 64bit ioctl wrapper for sequencer API
3  * Copyright (c) by Takashi Iwai <[email protected]>
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 seq.c */
22 
23 #include <linux/compat.h>
24 #include <linux/slab.h>
25 
26 struct snd_seq_port_info32 {
27  struct snd_seq_addr addr; /* client/port numbers */
28  char name[64]; /* port name */
29 
30  u32 capability; /* port capability bits */
31  u32 type; /* port type bits */
32  s32 midi_channels; /* channels per MIDI port */
33  s32 midi_voices; /* voices per MIDI port */
34  s32 synth_voices; /* voices per SYNTH port */
35 
36  s32 read_use; /* R/O: subscribers for output (from this port) */
37  s32 write_use; /* R/O: subscribers for input (to this port) */
38 
39  u32 kernel; /* reserved for kernel use (must be NULL) */
40  u32 flags; /* misc. conditioning */
41  unsigned char time_queue; /* queue # for timestamping */
42  char reserved[59]; /* for future use */
43 };
44 
45 static int snd_seq_call_port_info_ioctl(struct snd_seq_client *client, unsigned int cmd,
46  struct snd_seq_port_info32 __user *data32)
47 {
48  int err = -EFAULT;
49  struct snd_seq_port_info *data;
50  mm_segment_t fs;
51 
52  data = memdup_user(data32, sizeof(*data32));
53  if (IS_ERR(data))
54  return PTR_ERR(data);
55 
56  if (get_user(data->flags, &data32->flags) ||
57  get_user(data->time_queue, &data32->time_queue))
58  goto error;
59  data->kernel = NULL;
60 
61  fs = snd_enter_user();
62  err = snd_seq_do_ioctl(client, cmd, data);
63  snd_leave_user(fs);
64  if (err < 0)
65  goto error;
66 
67  if (copy_to_user(data32, data, sizeof(*data32)) ||
68  put_user(data->flags, &data32->flags) ||
69  put_user(data->time_queue, &data32->time_queue))
70  err = -EFAULT;
71 
72  error:
73  kfree(data);
74  return err;
75 }
76 
77 
78 
79 /*
80  */
81 
82 enum {
83  SNDRV_SEQ_IOCTL_CREATE_PORT32 = _IOWR('S', 0x20, struct snd_seq_port_info32),
84  SNDRV_SEQ_IOCTL_DELETE_PORT32 = _IOW ('S', 0x21, struct snd_seq_port_info32),
85  SNDRV_SEQ_IOCTL_GET_PORT_INFO32 = _IOWR('S', 0x22, struct snd_seq_port_info32),
86  SNDRV_SEQ_IOCTL_SET_PORT_INFO32 = _IOW ('S', 0x23, struct snd_seq_port_info32),
87  SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT32 = _IOWR('S', 0x52, struct snd_seq_port_info32),
88 };
89 
90 static long snd_seq_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
91 {
92  struct snd_seq_client *client = file->private_data;
93  void __user *argp = compat_ptr(arg);
94 
95  if (snd_BUG_ON(!client))
96  return -ENXIO;
97 
98  switch (cmd) {
99  case SNDRV_SEQ_IOCTL_PVERSION:
100  case SNDRV_SEQ_IOCTL_CLIENT_ID:
101  case SNDRV_SEQ_IOCTL_SYSTEM_INFO:
102  case SNDRV_SEQ_IOCTL_GET_CLIENT_INFO:
103  case SNDRV_SEQ_IOCTL_SET_CLIENT_INFO:
104  case SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT:
105  case SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT:
106  case SNDRV_SEQ_IOCTL_CREATE_QUEUE:
107  case SNDRV_SEQ_IOCTL_DELETE_QUEUE:
108  case SNDRV_SEQ_IOCTL_GET_QUEUE_INFO:
109  case SNDRV_SEQ_IOCTL_SET_QUEUE_INFO:
110  case SNDRV_SEQ_IOCTL_GET_NAMED_QUEUE:
111  case SNDRV_SEQ_IOCTL_GET_QUEUE_STATUS:
112  case SNDRV_SEQ_IOCTL_GET_QUEUE_TEMPO:
113  case SNDRV_SEQ_IOCTL_SET_QUEUE_TEMPO:
114  case SNDRV_SEQ_IOCTL_GET_QUEUE_TIMER:
115  case SNDRV_SEQ_IOCTL_SET_QUEUE_TIMER:
116  case SNDRV_SEQ_IOCTL_GET_QUEUE_CLIENT:
117  case SNDRV_SEQ_IOCTL_SET_QUEUE_CLIENT:
118  case SNDRV_SEQ_IOCTL_GET_CLIENT_POOL:
119  case SNDRV_SEQ_IOCTL_SET_CLIENT_POOL:
120  case SNDRV_SEQ_IOCTL_REMOVE_EVENTS:
121  case SNDRV_SEQ_IOCTL_QUERY_SUBS:
122  case SNDRV_SEQ_IOCTL_GET_SUBSCRIPTION:
123  case SNDRV_SEQ_IOCTL_QUERY_NEXT_CLIENT:
124  case SNDRV_SEQ_IOCTL_RUNNING_MODE:
125  return snd_seq_do_ioctl(client, cmd, argp);
126  case SNDRV_SEQ_IOCTL_CREATE_PORT32:
127  return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_CREATE_PORT, argp);
128  case SNDRV_SEQ_IOCTL_DELETE_PORT32:
129  return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_DELETE_PORT, argp);
130  case SNDRV_SEQ_IOCTL_GET_PORT_INFO32:
131  return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_GET_PORT_INFO, argp);
132  case SNDRV_SEQ_IOCTL_SET_PORT_INFO32:
133  return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_SET_PORT_INFO, argp);
134  case SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT32:
135  return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT, argp);
136  }
137  return -ENOIOCTLCMD;
138 }
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