Commit | Line | Data |
---|---|---|
1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * 32bit -> 64bit ioctl wrapper for raw MIDI API | |
4 | * Copyright (c) by Takashi Iwai <tiwai@suse.de> | |
1da177e4 LT |
5 | */ |
6 | ||
7 | /* This file included from rawmidi.c */ | |
8 | ||
9 | #include <linux/compat.h> | |
10 | ||
48c9d417 | 11 | struct snd_rawmidi_params32 { |
1da177e4 LT |
12 | s32 stream; |
13 | u32 buffer_size; | |
14 | u32 avail_min; | |
15 | unsigned int no_active_sensing; /* avoid bit-field */ | |
16 | unsigned char reserved[16]; | |
17 | } __attribute__((packed)); | |
18 | ||
48c9d417 TI |
19 | static int snd_rawmidi_ioctl_params_compat(struct snd_rawmidi_file *rfile, |
20 | struct snd_rawmidi_params32 __user *src) | |
1da177e4 | 21 | { |
48c9d417 | 22 | struct snd_rawmidi_params params; |
1da177e4 LT |
23 | unsigned int val; |
24 | ||
1da177e4 LT |
25 | if (get_user(params.stream, &src->stream) || |
26 | get_user(params.buffer_size, &src->buffer_size) || | |
27 | get_user(params.avail_min, &src->avail_min) || | |
28 | get_user(val, &src->no_active_sensing)) | |
29 | return -EFAULT; | |
30 | params.no_active_sensing = val; | |
31 | switch (params.stream) { | |
32 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
8a56ef4f TI |
33 | if (!rfile->output) |
34 | return -EINVAL; | |
1da177e4 LT |
35 | return snd_rawmidi_output_params(rfile->output, ¶ms); |
36 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
8a56ef4f TI |
37 | if (!rfile->input) |
38 | return -EINVAL; | |
1da177e4 LT |
39 | return snd_rawmidi_input_params(rfile->input, ¶ms); |
40 | } | |
41 | return -EINVAL; | |
42 | } | |
43 | ||
48c9d417 | 44 | struct snd_rawmidi_status32 { |
1da177e4 LT |
45 | s32 stream; |
46 | struct compat_timespec tstamp; | |
47 | u32 avail; | |
48 | u32 xruns; | |
49 | unsigned char reserved[16]; | |
50 | } __attribute__((packed)); | |
51 | ||
48c9d417 TI |
52 | static int snd_rawmidi_ioctl_status_compat(struct snd_rawmidi_file *rfile, |
53 | struct snd_rawmidi_status32 __user *src) | |
1da177e4 LT |
54 | { |
55 | int err; | |
48c9d417 | 56 | struct snd_rawmidi_status status; |
1da177e4 | 57 | |
1da177e4 LT |
58 | if (get_user(status.stream, &src->stream)) |
59 | return -EFAULT; | |
60 | ||
61 | switch (status.stream) { | |
62 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
8a56ef4f TI |
63 | if (!rfile->output) |
64 | return -EINVAL; | |
1da177e4 LT |
65 | err = snd_rawmidi_output_status(rfile->output, &status); |
66 | break; | |
67 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
8a56ef4f TI |
68 | if (!rfile->input) |
69 | return -EINVAL; | |
1da177e4 LT |
70 | err = snd_rawmidi_input_status(rfile->input, &status); |
71 | break; | |
72 | default: | |
73 | return -EINVAL; | |
74 | } | |
75 | if (err < 0) | |
76 | return err; | |
77 | ||
dd7e3f80 | 78 | if (compat_put_timespec(&status.tstamp, &src->tstamp) || |
1da177e4 LT |
79 | put_user(status.avail, &src->avail) || |
80 | put_user(status.xruns, &src->xruns)) | |
81 | return -EFAULT; | |
82 | ||
83 | return 0; | |
84 | } | |
85 | ||
2251fbbc TI |
86 | #ifdef CONFIG_X86_X32 |
87 | /* X32 ABI has 64bit timespec and 64bit alignment */ | |
88 | struct snd_rawmidi_status_x32 { | |
89 | s32 stream; | |
90 | u32 rsvd; /* alignment */ | |
91 | struct timespec tstamp; | |
92 | u32 avail; | |
93 | u32 xruns; | |
94 | unsigned char reserved[16]; | |
95 | } __attribute__((packed)); | |
96 | ||
97 | #define put_timespec(src, dst) copy_to_user(dst, src, sizeof(*dst)) | |
98 | ||
99 | static int snd_rawmidi_ioctl_status_x32(struct snd_rawmidi_file *rfile, | |
100 | struct snd_rawmidi_status_x32 __user *src) | |
101 | { | |
102 | int err; | |
103 | struct snd_rawmidi_status status; | |
104 | ||
2251fbbc TI |
105 | if (get_user(status.stream, &src->stream)) |
106 | return -EFAULT; | |
107 | ||
108 | switch (status.stream) { | |
109 | case SNDRV_RAWMIDI_STREAM_OUTPUT: | |
8a56ef4f TI |
110 | if (!rfile->output) |
111 | return -EINVAL; | |
2251fbbc TI |
112 | err = snd_rawmidi_output_status(rfile->output, &status); |
113 | break; | |
114 | case SNDRV_RAWMIDI_STREAM_INPUT: | |
8a56ef4f TI |
115 | if (!rfile->input) |
116 | return -EINVAL; | |
2251fbbc TI |
117 | err = snd_rawmidi_input_status(rfile->input, &status); |
118 | break; | |
119 | default: | |
120 | return -EINVAL; | |
121 | } | |
122 | if (err < 0) | |
123 | return err; | |
124 | ||
125 | if (put_timespec(&status.tstamp, &src->tstamp) || | |
126 | put_user(status.avail, &src->avail) || | |
127 | put_user(status.xruns, &src->xruns)) | |
128 | return -EFAULT; | |
129 | ||
130 | return 0; | |
131 | } | |
132 | #endif /* CONFIG_X86_X32 */ | |
133 | ||
1da177e4 | 134 | enum { |
48c9d417 TI |
135 | SNDRV_RAWMIDI_IOCTL_PARAMS32 = _IOWR('W', 0x10, struct snd_rawmidi_params32), |
136 | SNDRV_RAWMIDI_IOCTL_STATUS32 = _IOWR('W', 0x20, struct snd_rawmidi_status32), | |
2251fbbc TI |
137 | #ifdef CONFIG_X86_X32 |
138 | SNDRV_RAWMIDI_IOCTL_STATUS_X32 = _IOWR('W', 0x20, struct snd_rawmidi_status_x32), | |
139 | #endif /* CONFIG_X86_X32 */ | |
1da177e4 LT |
140 | }; |
141 | ||
142 | static long snd_rawmidi_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg) | |
143 | { | |
48c9d417 | 144 | struct snd_rawmidi_file *rfile; |
1da177e4 LT |
145 | void __user *argp = compat_ptr(arg); |
146 | ||
147 | rfile = file->private_data; | |
148 | switch (cmd) { | |
149 | case SNDRV_RAWMIDI_IOCTL_PVERSION: | |
150 | case SNDRV_RAWMIDI_IOCTL_INFO: | |
151 | case SNDRV_RAWMIDI_IOCTL_DROP: | |
152 | case SNDRV_RAWMIDI_IOCTL_DRAIN: | |
153 | return snd_rawmidi_ioctl(file, cmd, (unsigned long)argp); | |
154 | case SNDRV_RAWMIDI_IOCTL_PARAMS32: | |
155 | return snd_rawmidi_ioctl_params_compat(rfile, argp); | |
156 | case SNDRV_RAWMIDI_IOCTL_STATUS32: | |
157 | return snd_rawmidi_ioctl_status_compat(rfile, argp); | |
2251fbbc TI |
158 | #ifdef CONFIG_X86_X32 |
159 | case SNDRV_RAWMIDI_IOCTL_STATUS_X32: | |
160 | return snd_rawmidi_ioctl_status_x32(rfile, argp); | |
161 | #endif /* CONFIG_X86_X32 */ | |
1da177e4 LT |
162 | } |
163 | return -ENOIOCTLCMD; | |
164 | } |