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1 | /* |
2 | * 32bit -> 64bit ioctl wrapper for raw MIDI 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 rawmidi.c */ |
22 | |
23 | #include <linux/compat.h> |
24 | |
25 | struct snd_rawmidi_params32 { |
26 | s32 stream; |
27 | u32 buffer_size; |
28 | u32 avail_min; |
29 | unsigned int no_active_sensing; /* avoid bit-field */ |
30 | unsigned char reserved[16]; |
31 | } __attribute__((packed)); |
32 | |
33 | static int snd_rawmidi_ioctl_params_compat(struct snd_rawmidi_file *rfile, |
34 | struct snd_rawmidi_params32 __user *src) |
35 | { |
36 | struct snd_rawmidi_params params; |
37 | unsigned int val; |
38 | |
39 | if (rfile->output == NULL) |
40 | return -EINVAL; |
41 | if (get_user(params.stream, &src->stream) || |
42 | get_user(params.buffer_size, &src->buffer_size) || |
43 | get_user(params.avail_min, &src->avail_min) || |
44 | get_user(val, &src->no_active_sensing)) |
45 | return -EFAULT; |
46 | params.no_active_sensing = val; |
47 | switch (params.stream) { |
48 | case SNDRV_RAWMIDI_STREAM_OUTPUT: |
49 | return snd_rawmidi_output_params(rfile->output, ¶ms); |
50 | case SNDRV_RAWMIDI_STREAM_INPUT: |
51 | return snd_rawmidi_input_params(rfile->input, ¶ms); |
52 | } |
53 | return -EINVAL; |
54 | } |
55 | |
56 | struct snd_rawmidi_status32 { |
57 | s32 stream; |
58 | struct compat_timespec tstamp; |
59 | u32 avail; |
60 | u32 xruns; |
61 | unsigned char reserved[16]; |
62 | } __attribute__((packed)); |
63 | |
64 | static int snd_rawmidi_ioctl_status_compat(struct snd_rawmidi_file *rfile, |
65 | struct snd_rawmidi_status32 __user *src) |
66 | { |
67 | int err; |
68 | struct snd_rawmidi_status status; |
69 | |
70 | if (rfile->output == NULL) |
71 | return -EINVAL; |
72 | if (get_user(status.stream, &src->stream)) |
73 | return -EFAULT; |
74 | |
75 | switch (status.stream) { |
76 | case SNDRV_RAWMIDI_STREAM_OUTPUT: |
77 | err = snd_rawmidi_output_status(rfile->output, &status); |
78 | break; |
79 | case SNDRV_RAWMIDI_STREAM_INPUT: |
80 | err = snd_rawmidi_input_status(rfile->input, &status); |
81 | break; |
82 | default: |
83 | return -EINVAL; |
84 | } |
85 | if (err < 0) |
86 | return err; |
87 | |
88 | if (put_user(status.tstamp.tv_sec, &src->tstamp.tv_sec) || |
89 | put_user(status.tstamp.tv_nsec, &src->tstamp.tv_nsec) || |
90 | put_user(status.avail, &src->avail) || |
91 | put_user(status.xruns, &src->xruns)) |
92 | return -EFAULT; |
93 | |
94 | return 0; |
95 | } |
96 | |
97 | enum { |
98 | SNDRV_RAWMIDI_IOCTL_PARAMS32 = _IOWR('W', 0x10, struct snd_rawmidi_params32), |
99 | SNDRV_RAWMIDI_IOCTL_STATUS32 = _IOWR('W', 0x20, struct snd_rawmidi_status32), |
100 | }; |
101 | |
102 | static long snd_rawmidi_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg) |
103 | { |
104 | struct snd_rawmidi_file *rfile; |
105 | void __user *argp = compat_ptr(arg); |
106 | |
107 | rfile = file->private_data; |
108 | switch (cmd) { |
109 | case SNDRV_RAWMIDI_IOCTL_PVERSION: |
110 | case SNDRV_RAWMIDI_IOCTL_INFO: |
111 | case SNDRV_RAWMIDI_IOCTL_DROP: |
112 | case SNDRV_RAWMIDI_IOCTL_DRAIN: |
113 | return snd_rawmidi_ioctl(file, cmd, (unsigned long)argp); |
114 | case SNDRV_RAWMIDI_IOCTL_PARAMS32: |
115 | return snd_rawmidi_ioctl_params_compat(rfile, argp); |
116 | case SNDRV_RAWMIDI_IOCTL_STATUS32: |
117 | return snd_rawmidi_ioctl_status_compat(rfile, argp); |
118 | } |
119 | return -ENOIOCTLCMD; |
120 | } |
121 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
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v3.9