1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *   32bit -> 64bit ioctl wrapper for sequencer API
4  *   Copyright (c) by Takashi Iwai <tiwai@suse.de>
5  */
6 
7 /* This file included from seq.c */
8 
9 #include <linux/compat.h>
10 #include <linux/slab.h>
11 
12 struct snd_seq_port_info32 {
13 	struct snd_seq_addr addr;	/* client/port numbers */
14 	char name[64];			/* port name */
15 
16 	u32 capability;	/* port capability bits */
17 	u32 type;		/* port type bits */
18 	s32 midi_channels;		/* channels per MIDI port */
19 	s32 midi_voices;		/* voices per MIDI port */
20 	s32 synth_voices;		/* voices per SYNTH port */
21 
22 	s32 read_use;			/* R/O: subscribers for output (from this port) */
23 	s32 write_use;			/* R/O: subscribers for input (to this port) */
24 
25 	u32 kernel;			/* reserved for kernel use (must be NULL) */
26 	u32 flags;		/* misc. conditioning */
27 	unsigned char time_queue;	/* queue # for timestamping */
28 	char reserved[59];		/* for future use */
29 };
30 
snd_seq_call_port_info_ioctl(struct snd_seq_client * client,unsigned int cmd,struct snd_seq_port_info32 __user * data32)31 static int snd_seq_call_port_info_ioctl(struct snd_seq_client *client, unsigned int cmd,
32 					struct snd_seq_port_info32 __user *data32)
33 {
34 	int err = -EFAULT;
35 	struct snd_seq_port_info *data;
36 
37 	data = kmalloc(sizeof(*data), GFP_KERNEL);
38 	if (!data)
39 		return -ENOMEM;
40 
41 	if (copy_from_user(data, data32, sizeof(*data32)) ||
42 	    get_user(data->flags, &data32->flags) ||
43 	    get_user(data->time_queue, &data32->time_queue))
44 		goto error;
45 	data->kernel = NULL;
46 
47 	err = snd_seq_kernel_client_ctl(client->number, cmd, data);
48 	if (err < 0)
49 		goto error;
50 
51 	if (copy_to_user(data32, data, sizeof(*data32)) ||
52 	    put_user(data->flags, &data32->flags) ||
53 	    put_user(data->time_queue, &data32->time_queue))
54 		err = -EFAULT;
55 
56  error:
57 	kfree(data);
58 	return err;
59 }
60 
61 
62 
63 /*
64  */
65 
66 enum {
67 	SNDRV_SEQ_IOCTL_CREATE_PORT32 = _IOWR('S', 0x20, struct snd_seq_port_info32),
68 	SNDRV_SEQ_IOCTL_DELETE_PORT32 = _IOW ('S', 0x21, struct snd_seq_port_info32),
69 	SNDRV_SEQ_IOCTL_GET_PORT_INFO32 = _IOWR('S', 0x22, struct snd_seq_port_info32),
70 	SNDRV_SEQ_IOCTL_SET_PORT_INFO32 = _IOW ('S', 0x23, struct snd_seq_port_info32),
71 	SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT32 = _IOWR('S', 0x52, struct snd_seq_port_info32),
72 };
73 
snd_seq_ioctl_compat(struct file * file,unsigned int cmd,unsigned long arg)74 static long snd_seq_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
75 {
76 	struct snd_seq_client *client = file->private_data;
77 	void __user *argp = compat_ptr(arg);
78 
79 	if (snd_BUG_ON(!client))
80 		return -ENXIO;
81 
82 	switch (cmd) {
83 	case SNDRV_SEQ_IOCTL_PVERSION:
84 	case SNDRV_SEQ_IOCTL_CLIENT_ID:
85 	case SNDRV_SEQ_IOCTL_SYSTEM_INFO:
86 	case SNDRV_SEQ_IOCTL_GET_CLIENT_INFO:
87 	case SNDRV_SEQ_IOCTL_SET_CLIENT_INFO:
88 	case SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT:
89 	case SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT:
90 	case SNDRV_SEQ_IOCTL_CREATE_QUEUE:
91 	case SNDRV_SEQ_IOCTL_DELETE_QUEUE:
92 	case SNDRV_SEQ_IOCTL_GET_QUEUE_INFO:
93 	case SNDRV_SEQ_IOCTL_SET_QUEUE_INFO:
94 	case SNDRV_SEQ_IOCTL_GET_NAMED_QUEUE:
95 	case SNDRV_SEQ_IOCTL_GET_QUEUE_STATUS:
96 	case SNDRV_SEQ_IOCTL_GET_QUEUE_TEMPO:
97 	case SNDRV_SEQ_IOCTL_SET_QUEUE_TEMPO:
98 	case SNDRV_SEQ_IOCTL_GET_QUEUE_TIMER:
99 	case SNDRV_SEQ_IOCTL_SET_QUEUE_TIMER:
100 	case SNDRV_SEQ_IOCTL_GET_QUEUE_CLIENT:
101 	case SNDRV_SEQ_IOCTL_SET_QUEUE_CLIENT:
102 	case SNDRV_SEQ_IOCTL_GET_CLIENT_POOL:
103 	case SNDRV_SEQ_IOCTL_SET_CLIENT_POOL:
104 	case SNDRV_SEQ_IOCTL_REMOVE_EVENTS:
105 	case SNDRV_SEQ_IOCTL_QUERY_SUBS:
106 	case SNDRV_SEQ_IOCTL_GET_SUBSCRIPTION:
107 	case SNDRV_SEQ_IOCTL_QUERY_NEXT_CLIENT:
108 	case SNDRV_SEQ_IOCTL_RUNNING_MODE:
109 		return snd_seq_ioctl(file, cmd, arg);
110 	case SNDRV_SEQ_IOCTL_CREATE_PORT32:
111 		return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_CREATE_PORT, argp);
112 	case SNDRV_SEQ_IOCTL_DELETE_PORT32:
113 		return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_DELETE_PORT, argp);
114 	case SNDRV_SEQ_IOCTL_GET_PORT_INFO32:
115 		return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_GET_PORT_INFO, argp);
116 	case SNDRV_SEQ_IOCTL_SET_PORT_INFO32:
117 		return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_SET_PORT_INFO, argp);
118 	case SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT32:
119 		return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT, argp);
120 	}
121 	return -ENOIOCTLCMD;
122 }
123