sound/core/seq/seq_compat.c

   1 /*
   2  *   32bit -> 64bit ioctl wrapper for sequencer 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 seq.c */
  22
  23 #include <linux/compat.h>
  24 #include <linux/slab.h>
  25
  26 struct snd_seq_port_info32 {
  27         struct snd_seq_addr addr;       /* client/port numbers */
  28         char name[64];                  /* port name */
  29
  30         u32 capability; /* port capability bits */
  31         u32 type;               /* port type bits */
  32         s32 midi_channels;              /* channels per MIDI port */
  33         s32 midi_voices;                /* voices per MIDI port */
  34         s32 synth_voices;               /* voices per SYNTH port */
  35
  36         s32 read_use;                   /* R/O: subscribers for output (from this port) */
  37         s32 write_use;                  /* R/O: subscribers for input (to this port) */
  38
  39         u32 kernel;                     /* reserved for kernel use (must be NULL) */
  40         u32 flags;              /* misc. conditioning */
  41         unsigned char time_queue;       /* queue # for timestamping */
  42         char reserved[59];              /* for future use */
  43 };
  44
  45 static int snd_seq_call_port_info_ioctl(struct snd_seq_client *client, unsigned int cmd,
  46                                         struct snd_seq_port_info32 __user *data32)
  47 {
  48         int err = -EFAULT;
  49         struct snd_seq_port_info *data;
  50         mm_segment_t fs;
  51
  52         data = kmalloc(sizeof(*data), GFP_KERNEL);
  53         if (!data)
  54                 return -ENOMEM;
  55
  56         if (copy_from_user(data, data32, sizeof(*data32)) ||
  57             get_user(data->flags, &data32->flags) ||
  58             get_user(data->time_queue, &data32->time_queue))
  59                 goto error;
  60         data->kernel = NULL;
  61
  62         if (snd_seq_kernel_client_ctl(client->number, cmd, &data) >= 0)
  63                 return 0;
  64
  65         fs = snd_enter_user();
  66         err = snd_seq_do_ioctl(client, cmd, data);
  67         snd_leave_user(fs);
  68         if (err < 0)
  69                 goto error;
  70
  71         if (copy_to_user(data32, data, sizeof(*data32)) ||
  72             put_user(data->flags, &data32->flags) ||
  73             put_user(data->time_queue, &data32->time_queue))
  74                 err = -EFAULT;
  75
  76  error:
  77         kfree(data);
  78         return err;
  79 }
  80
  81
  82
  83 /*
  84  */
  85
  86 enum {
  87         SNDRV_SEQ_IOCTL_CREATE_PORT32 = _IOWR('S', 0x20, struct snd_seq_port_info32),
  88         SNDRV_SEQ_IOCTL_DELETE_PORT32 = _IOW ('S', 0x21, struct snd_seq_port_info32),
  89         SNDRV_SEQ_IOCTL_GET_PORT_INFO32 = _IOWR('S', 0x22, struct snd_seq_port_info32),
  90         SNDRV_SEQ_IOCTL_SET_PORT_INFO32 = _IOW ('S', 0x23, struct snd_seq_port_info32),
  91         SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT32 = _IOWR('S', 0x52, struct snd_seq_port_info32),
  92 };
  93
  94 static long snd_seq_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
  95 {
  96         struct snd_seq_client *client = file->private_data;
  97         void __user *argp = compat_ptr(arg);
  98
  99         if (snd_BUG_ON(!client))
 100                 return -ENXIO;
 101
 102         switch (cmd) {
 103         case SNDRV_SEQ_IOCTL_PVERSION:
 104         case SNDRV_SEQ_IOCTL_CLIENT_ID:
 105         case SNDRV_SEQ_IOCTL_SYSTEM_INFO:
 106         case SNDRV_SEQ_IOCTL_GET_CLIENT_INFO:
 107         case SNDRV_SEQ_IOCTL_SET_CLIENT_INFO:
 108         case SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT:
 109         case SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT:
 110         case SNDRV_SEQ_IOCTL_CREATE_QUEUE:
 111         case SNDRV_SEQ_IOCTL_DELETE_QUEUE:
 112         case SNDRV_SEQ_IOCTL_GET_QUEUE_INFO:
 113         case SNDRV_SEQ_IOCTL_SET_QUEUE_INFO:
 114         case SNDRV_SEQ_IOCTL_GET_NAMED_QUEUE:
 115         case SNDRV_SEQ_IOCTL_GET_QUEUE_STATUS:
 116         case SNDRV_SEQ_IOCTL_GET_QUEUE_TEMPO:
 117         case SNDRV_SEQ_IOCTL_SET_QUEUE_TEMPO:
 118         case SNDRV_SEQ_IOCTL_GET_QUEUE_TIMER:
 119         case SNDRV_SEQ_IOCTL_SET_QUEUE_TIMER:
 120         case SNDRV_SEQ_IOCTL_GET_QUEUE_CLIENT:
 121         case SNDRV_SEQ_IOCTL_SET_QUEUE_CLIENT:
 122         case SNDRV_SEQ_IOCTL_GET_CLIENT_POOL:
 123         case SNDRV_SEQ_IOCTL_SET_CLIENT_POOL:
 124         case SNDRV_SEQ_IOCTL_REMOVE_EVENTS:
 125         case SNDRV_SEQ_IOCTL_QUERY_SUBS:
 126         case SNDRV_SEQ_IOCTL_GET_SUBSCRIPTION:
 127         case SNDRV_SEQ_IOCTL_QUERY_NEXT_CLIENT:
 128         case SNDRV_SEQ_IOCTL_RUNNING_MODE:
 129                 if (seq_ioctl(file, cmd, arg) >= 0)
 130                         return 0;
 131                 return snd_seq_do_ioctl(client, cmd, argp);
 132         case SNDRV_SEQ_IOCTL_CREATE_PORT32:
 133                 return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_CREATE_PORT, argp);
 134         case SNDRV_SEQ_IOCTL_DELETE_PORT32:
 135                 return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_DELETE_PORT, argp);
 136         case SNDRV_SEQ_IOCTL_GET_PORT_INFO32:
 137                 return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_GET_PORT_INFO, argp);
 138         case SNDRV_SEQ_IOCTL_SET_PORT_INFO32:
 139                 return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_SET_PORT_INFO, argp);
 140         case SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT32:
 141                 return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT, argp);
 142         }
 143         return -ENOIOCTLCMD;
 144 }