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 	struct snd_seq_port_info *data __free(kfree) = NULL;
35 	int err;
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 		return -EFAULT;
45 	data->kernel = NULL;
46 
47 	err = snd_seq_kernel_client_ctl(client->number, cmd, data);
48 	if (err < 0)
49 		return err;
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 		return -EFAULT;
55 
56 	return err;
57 }
58 
59 
60 
61 /*
62  */
63 
64 enum {
65 	SNDRV_SEQ_IOCTL_CREATE_PORT32 = _IOWR('S', 0x20, struct snd_seq_port_info32),
66 	SNDRV_SEQ_IOCTL_DELETE_PORT32 = _IOW ('S', 0x21, struct snd_seq_port_info32),
67 	SNDRV_SEQ_IOCTL_GET_PORT_INFO32 = _IOWR('S', 0x22, struct snd_seq_port_info32),
68 	SNDRV_SEQ_IOCTL_SET_PORT_INFO32 = _IOW ('S', 0x23, struct snd_seq_port_info32),
69 	SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT32 = _IOWR('S', 0x52, struct snd_seq_port_info32),
70 };
71 
snd_seq_ioctl_compat(struct file * file,unsigned int cmd,unsigned long arg)72 static long snd_seq_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
73 {
74 	struct snd_seq_client *client = file->private_data;
75 	void __user *argp = compat_ptr(arg);
76 
77 	if (snd_BUG_ON(!client))
78 		return -ENXIO;
79 
80 	switch (cmd) {
81 	case SNDRV_SEQ_IOCTL_PVERSION:
82 	case SNDRV_SEQ_IOCTL_USER_PVERSION:
83 	case SNDRV_SEQ_IOCTL_CLIENT_ID:
84 	case SNDRV_SEQ_IOCTL_SYSTEM_INFO:
85 	case SNDRV_SEQ_IOCTL_GET_CLIENT_INFO:
86 	case SNDRV_SEQ_IOCTL_SET_CLIENT_INFO:
87 	case SNDRV_SEQ_IOCTL_GET_CLIENT_UMP_INFO:
88 	case SNDRV_SEQ_IOCTL_SET_CLIENT_UMP_INFO:
89 	case SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT:
90 	case SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT:
91 	case SNDRV_SEQ_IOCTL_CREATE_QUEUE:
92 	case SNDRV_SEQ_IOCTL_DELETE_QUEUE:
93 	case SNDRV_SEQ_IOCTL_GET_QUEUE_INFO:
94 	case SNDRV_SEQ_IOCTL_SET_QUEUE_INFO:
95 	case SNDRV_SEQ_IOCTL_GET_NAMED_QUEUE:
96 	case SNDRV_SEQ_IOCTL_GET_QUEUE_STATUS:
97 	case SNDRV_SEQ_IOCTL_GET_QUEUE_TEMPO:
98 	case SNDRV_SEQ_IOCTL_SET_QUEUE_TEMPO:
99 	case SNDRV_SEQ_IOCTL_GET_QUEUE_TIMER:
100 	case SNDRV_SEQ_IOCTL_SET_QUEUE_TIMER:
101 	case SNDRV_SEQ_IOCTL_GET_QUEUE_CLIENT:
102 	case SNDRV_SEQ_IOCTL_SET_QUEUE_CLIENT:
103 	case SNDRV_SEQ_IOCTL_GET_CLIENT_POOL:
104 	case SNDRV_SEQ_IOCTL_SET_CLIENT_POOL:
105 	case SNDRV_SEQ_IOCTL_REMOVE_EVENTS:
106 	case SNDRV_SEQ_IOCTL_QUERY_SUBS:
107 	case SNDRV_SEQ_IOCTL_GET_SUBSCRIPTION:
108 	case SNDRV_SEQ_IOCTL_QUERY_NEXT_CLIENT:
109 	case SNDRV_SEQ_IOCTL_RUNNING_MODE:
110 		return snd_seq_ioctl(file, cmd, arg);
111 	case SNDRV_SEQ_IOCTL_CREATE_PORT32:
112 		return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_CREATE_PORT, argp);
113 	case SNDRV_SEQ_IOCTL_DELETE_PORT32:
114 		return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_DELETE_PORT, argp);
115 	case SNDRV_SEQ_IOCTL_GET_PORT_INFO32:
116 		return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_GET_PORT_INFO, argp);
117 	case SNDRV_SEQ_IOCTL_SET_PORT_INFO32:
118 		return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_SET_PORT_INFO, argp);
119 	case SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT32:
120 		return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT, argp);
121 	}
122 	return -ENOIOCTLCMD;
123 }
124