LXR linux/sound/core/seq/seq

   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
  26struct 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
  45static 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 = memdup_user(data32, sizeof(*data32));
  53        if (IS_ERR(data))
  54                return PTR_ERR(data);
  55
  56        if (get_user(data->flags, &data32->flags) ||
  57            get_user(data->time_queue, &data32->time_queue))
  58                goto error;
  59        data->kernel = NULL;
  60
  61        fs = snd_enter_user();
  62        err = snd_seq_do_ioctl(client, cmd, data);
  63        snd_leave_user(fs);
  64        if (err < 0)
  65                goto error;
  66
  67        if (copy_to_user(data32, data, sizeof(*data32)) ||
  68            put_user(data->flags, &data32->flags) ||
  69            put_user(data->time_queue, &data32->time_queue))
  70                err = -EFAULT;
  71
  72 error:
  73        kfree(data);
  74        return err;
  75}
  76
  77
  78
  79/*
  80 */
  81
  82enum {
  83        SNDRV_SEQ_IOCTL_CREATE_PORT32 = _IOWR('S', 0x20, struct snd_seq_port_info32),
  84        SNDRV_SEQ_IOCTL_DELETE_PORT32 = _IOW ('S', 0x21, struct snd_seq_port_info32),
  85        SNDRV_SEQ_IOCTL_GET_PORT_INFO32 = _IOWR('S', 0x22, struct snd_seq_port_info32),
  86        SNDRV_SEQ_IOCTL_SET_PORT_INFO32 = _IOW ('S', 0x23, struct snd_seq_port_info32),
  87        SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT32 = _IOWR('S', 0x52, struct snd_seq_port_info32),
  88};
  89
  90static long snd_seq_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
  91{
  92        struct snd_seq_client *client = file->private_data;
  93        void __user *argp = compat_ptr(arg);
  94
  95        if (snd_BUG_ON(!client))
  96                return -ENXIO;
  97
  98        switch (cmd) {
  99        case SNDRV_SEQ_IOCTL_PVERSION:
 100        case SNDRV_SEQ_IOCTL_CLIENT_ID:
 101        case SNDRV_SEQ_IOCTL_SYSTEM_INFO:
 102        case SNDRV_SEQ_IOCTL_GET_CLIENT_INFO:
 103        case SNDRV_SEQ_IOCTL_SET_CLIENT_INFO:
 104        case SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT:
 105        case SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT:
 106        case SNDRV_SEQ_IOCTL_CREATE_QUEUE:
 107        case SNDRV_SEQ_IOCTL_DELETE_QUEUE:
 108        case SNDRV_SEQ_IOCTL_GET_QUEUE_INFO:
 109        case SNDRV_SEQ_IOCTL_SET_QUEUE_INFO:
 110        case SNDRV_SEQ_IOCTL_GET_NAMED_QUEUE:
 111        case SNDRV_SEQ_IOCTL_GET_QUEUE_STATUS:
 112        case SNDRV_SEQ_IOCTL_GET_QUEUE_TEMPO:
 113        case SNDRV_SEQ_IOCTL_SET_QUEUE_TEMPO:
 114        case SNDRV_SEQ_IOCTL_GET_QUEUE_TIMER:
 115        case SNDRV_SEQ_IOCTL_SET_QUEUE_TIMER:
 116        case SNDRV_SEQ_IOCTL_GET_QUEUE_CLIENT:
 117        case SNDRV_SEQ_IOCTL_SET_QUEUE_CLIENT:
 118        case SNDRV_SEQ_IOCTL_GET_CLIENT_POOL:
 119        case SNDRV_SEQ_IOCTL_SET_CLIENT_POOL:
 120        case SNDRV_SEQ_IOCTL_REMOVE_EVENTS:
 121        case SNDRV_SEQ_IOCTL_QUERY_SUBS:
 122        case SNDRV_SEQ_IOCTL_GET_SUBSCRIPTION:
 123        case SNDRV_SEQ_IOCTL_QUERY_NEXT_CLIENT:
 124        case SNDRV_SEQ_IOCTL_RUNNING_MODE:
 125                return snd_seq_do_ioctl(client, cmd, argp);
 126        case SNDRV_SEQ_IOCTL_CREATE_PORT32:
 127                return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_CREATE_PORT, argp);
 128        case SNDRV_SEQ_IOCTL_DELETE_PORT32:
 129                return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_DELETE_PORT, argp);
 130        case SNDRV_SEQ_IOCTL_GET_PORT_INFO32:
 131                return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_GET_PORT_INFO, argp);
 132        case SNDRV_SEQ_IOCTL_SET_PORT_INFO32:
 133                return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_SET_PORT_INFO, argp);
 134        case SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT32:
 135                return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT, argp);
 136        }
 137        return -ENOIOCTLCMD;
 138}
 139