core/seq/seq_compat.c

0001 // SPDX-License-Identifier: GPL-2.0-or-later
0002 /*
0003  *   32bit -> 64bit ioctl wrapper for sequencer API
0004  *   Copyright (c) by Takashi Iwai <tiwai@suse.de>
0005  */
0006
0007 /* This file included from seq.c */
0008
0009 #include <linux/compat.h>
0010 #include <linux/slab.h>
0011
0012 struct snd_seq_port_info32 {
0013     struct snd_seq_addr addr;   /* client/port numbers */
0014     char name[64];          /* port name */
0015
0016     u32 capability; /* port capability bits */
0017     u32 type;       /* port type bits */
0018     s32 midi_channels;      /* channels per MIDI port */
0019     s32 midi_voices;        /* voices per MIDI port */
0020     s32 synth_voices;       /* voices per SYNTH port */
0021
0022     s32 read_use;           /* R/O: subscribers for output (from this port) */
0023     s32 write_use;          /* R/O: subscribers for input (to this port) */
0024
0025     u32 kernel;         /* reserved for kernel use (must be NULL) */
0026     u32 flags;      /* misc. conditioning */
0027     unsigned char time_queue;   /* queue # for timestamping */
0028     char reserved[59];      /* for future use */
0029 };
0030
0031 static int snd_seq_call_port_info_ioctl(struct snd_seq_client *client, unsigned int cmd,
0032                     struct snd_seq_port_info32 __user *data32)
0033 {
0034     int err = -EFAULT;
0035     struct snd_seq_port_info *data;
0036
0037     data = kmalloc(sizeof(*data), GFP_KERNEL);
0038     if (!data)
0039         return -ENOMEM;
0040
0041     if (copy_from_user(data, data32, sizeof(*data32)) ||
0042         get_user(data->flags, &data32->flags) ||
0043         get_user(data->time_queue, &data32->time_queue))
0044         goto error;
0045     data->kernel = NULL;
0046
0047     err = snd_seq_kernel_client_ctl(client->number, cmd, data);
0048     if (err < 0)
0049         goto error;
0050
0051     if (copy_to_user(data32, data, sizeof(*data32)) ||
0052         put_user(data->flags, &data32->flags) ||
0053         put_user(data->time_queue, &data32->time_queue))
0054         err = -EFAULT;
0055
0056  error:
0057     kfree(data);
0058     return err;
0059 }
0060
0061
0062
0063 /*
0064  */
0065
0066 enum {
0067     SNDRV_SEQ_IOCTL_CREATE_PORT32 = _IOWR('S', 0x20, struct snd_seq_port_info32),
0068     SNDRV_SEQ_IOCTL_DELETE_PORT32 = _IOW ('S', 0x21, struct snd_seq_port_info32),
0069     SNDRV_SEQ_IOCTL_GET_PORT_INFO32 = _IOWR('S', 0x22, struct snd_seq_port_info32),
0070     SNDRV_SEQ_IOCTL_SET_PORT_INFO32 = _IOW ('S', 0x23, struct snd_seq_port_info32),
0071     SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT32 = _IOWR('S', 0x52, struct snd_seq_port_info32),
0072 };
0073
0074 static long snd_seq_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
0075 {
0076     struct snd_seq_client *client = file->private_data;
0077     void __user *argp = compat_ptr(arg);
0078
0079     if (snd_BUG_ON(!client))
0080         return -ENXIO;
0081
0082     switch (cmd) {
0083     case SNDRV_SEQ_IOCTL_PVERSION:
0084     case SNDRV_SEQ_IOCTL_CLIENT_ID:
0085     case SNDRV_SEQ_IOCTL_SYSTEM_INFO:
0086     case SNDRV_SEQ_IOCTL_GET_CLIENT_INFO:
0087     case SNDRV_SEQ_IOCTL_SET_CLIENT_INFO:
0088     case SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT:
0089     case SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT:
0090     case SNDRV_SEQ_IOCTL_CREATE_QUEUE:
0091     case SNDRV_SEQ_IOCTL_DELETE_QUEUE:
0092     case SNDRV_SEQ_IOCTL_GET_QUEUE_INFO:
0093     case SNDRV_SEQ_IOCTL_SET_QUEUE_INFO:
0094     case SNDRV_SEQ_IOCTL_GET_NAMED_QUEUE:
0095     case SNDRV_SEQ_IOCTL_GET_QUEUE_STATUS:
0096     case SNDRV_SEQ_IOCTL_GET_QUEUE_TEMPO:
0097     case SNDRV_SEQ_IOCTL_SET_QUEUE_TEMPO:
0098     case SNDRV_SEQ_IOCTL_GET_QUEUE_TIMER:
0099     case SNDRV_SEQ_IOCTL_SET_QUEUE_TIMER:
0100     case SNDRV_SEQ_IOCTL_GET_QUEUE_CLIENT:
0101     case SNDRV_SEQ_IOCTL_SET_QUEUE_CLIENT:
0102     case SNDRV_SEQ_IOCTL_GET_CLIENT_POOL:
0103     case SNDRV_SEQ_IOCTL_SET_CLIENT_POOL:
0104     case SNDRV_SEQ_IOCTL_REMOVE_EVENTS:
0105     case SNDRV_SEQ_IOCTL_QUERY_SUBS:
0106     case SNDRV_SEQ_IOCTL_GET_SUBSCRIPTION:
0107     case SNDRV_SEQ_IOCTL_QUERY_NEXT_CLIENT:
0108     case SNDRV_SEQ_IOCTL_RUNNING_MODE:
0109         return snd_seq_ioctl(file, cmd, arg);
0110     case SNDRV_SEQ_IOCTL_CREATE_PORT32:
0111         return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_CREATE_PORT, argp);
0112     case SNDRV_SEQ_IOCTL_DELETE_PORT32:
0113         return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_DELETE_PORT, argp);
0114     case SNDRV_SEQ_IOCTL_GET_PORT_INFO32:
0115         return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_GET_PORT_INFO, argp);
0116     case SNDRV_SEQ_IOCTL_SET_PORT_INFO32:
0117         return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_SET_PORT_INFO, argp);
0118     case SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT32:
0119         return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT, argp);
0120     }
0121     return -ENOIOCTLCMD;
0122 }