root/sound/core/seq/seq_compat.c

DEFINITIONS

1. snd_seq_call_port_info_ioctl
2. _IOWR
3. _IOW
4. _IOWR
5. _IOW
6. _IOWR
7. snd_seq_ioctl_compat

/*
 *   32bit -> 64bit ioctl wrapper for sequencer API
 *   Copyright (c) by Takashi Iwai <tiwai@suse.de>
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

/* This file included from seq.c */

#include <linux/compat.h>

struct snd_seq_port_info32 {
        struct snd_seq_addr addr;       /* client/port numbers */
        char name[64];                  /* port name */

        u32 capability; /* port capability bits */
        u32 type;               /* port type bits */
        s32 midi_channels;              /* channels per MIDI port */
        s32 midi_voices;                /* voices per MIDI port */
        s32 synth_voices;               /* voices per SYNTH port */

        s32 read_use;                   /* R/O: subscribers for output (from this port) */
        s32 write_use;                  /* R/O: subscribers for input (to this port) */

        u32 kernel;                     /* reserved for kernel use (must be NULL) */
        u32 flags;              /* misc. conditioning */
        unsigned char time_queue;       /* queue # for timestamping */
        char reserved[59];              /* for future use */
};

static int snd_seq_call_port_info_ioctl(struct snd_seq_client *client, unsigned int cmd,
                                        struct snd_seq_port_info32 __user *data32)
{
        int err = -EFAULT;
        struct snd_seq_port_info *data;
        mm_segment_t fs;

        data = kmalloc(sizeof(*data), GFP_KERNEL);
        if (! data)
                return -ENOMEM;

        if (copy_from_user(data, data32, sizeof(*data32)) ||
            get_user(data->flags, &data32->flags) ||
            get_user(data->time_queue, &data32->time_queue))
                goto error;
        data->kernel = NULL;

        fs = snd_enter_user();
        err = snd_seq_do_ioctl(client, cmd, data);
        snd_leave_user(fs);
        if (err < 0)
                goto error;

        if (copy_to_user(data32, data, sizeof(*data32)) ||
            put_user(data->flags, &data32->flags) ||
            put_user(data->time_queue, &data32->time_queue))
                err = -EFAULT;

 error:
        kfree(data);
        return err;
}



/*
 */

enum {
        SNDRV_SEQ_IOCTL_CREATE_PORT32 = _IOWR('S', 0x20, struct snd_seq_port_info32),
        SNDRV_SEQ_IOCTL_DELETE_PORT32 = _IOW ('S', 0x21, struct snd_seq_port_info32),
        SNDRV_SEQ_IOCTL_GET_PORT_INFO32 = _IOWR('S', 0x22, struct snd_seq_port_info32),
        SNDRV_SEQ_IOCTL_SET_PORT_INFO32 = _IOW ('S', 0x23, struct snd_seq_port_info32),
        SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT32 = _IOWR('S', 0x52, struct snd_seq_port_info32),
};

static long snd_seq_ioctl_compat(struct file *file, unsigned int cmd, unsigned long arg)
{
        struct snd_seq_client *client = file->private_data;
        void __user *argp = compat_ptr(arg);

        if (snd_BUG_ON(!client))
                return -ENXIO;

        switch (cmd) {
        case SNDRV_SEQ_IOCTL_PVERSION:
        case SNDRV_SEQ_IOCTL_CLIENT_ID:
        case SNDRV_SEQ_IOCTL_SYSTEM_INFO:
        case SNDRV_SEQ_IOCTL_GET_CLIENT_INFO:
        case SNDRV_SEQ_IOCTL_SET_CLIENT_INFO:
        case SNDRV_SEQ_IOCTL_SUBSCRIBE_PORT:
        case SNDRV_SEQ_IOCTL_UNSUBSCRIBE_PORT:
        case SNDRV_SEQ_IOCTL_CREATE_QUEUE:
        case SNDRV_SEQ_IOCTL_DELETE_QUEUE:
        case SNDRV_SEQ_IOCTL_GET_QUEUE_INFO:
        case SNDRV_SEQ_IOCTL_SET_QUEUE_INFO:
        case SNDRV_SEQ_IOCTL_GET_NAMED_QUEUE:
        case SNDRV_SEQ_IOCTL_GET_QUEUE_STATUS:
        case SNDRV_SEQ_IOCTL_GET_QUEUE_TEMPO:
        case SNDRV_SEQ_IOCTL_SET_QUEUE_TEMPO:
        case SNDRV_SEQ_IOCTL_GET_QUEUE_TIMER:
        case SNDRV_SEQ_IOCTL_SET_QUEUE_TIMER:
        case SNDRV_SEQ_IOCTL_GET_QUEUE_CLIENT:
        case SNDRV_SEQ_IOCTL_SET_QUEUE_CLIENT:
        case SNDRV_SEQ_IOCTL_GET_CLIENT_POOL:
        case SNDRV_SEQ_IOCTL_SET_CLIENT_POOL:
        case SNDRV_SEQ_IOCTL_REMOVE_EVENTS:
        case SNDRV_SEQ_IOCTL_QUERY_SUBS:
        case SNDRV_SEQ_IOCTL_GET_SUBSCRIPTION:
        case SNDRV_SEQ_IOCTL_QUERY_NEXT_CLIENT:
        case SNDRV_SEQ_IOCTL_RUNNING_MODE:
                return snd_seq_do_ioctl(client, cmd, argp);
        case SNDRV_SEQ_IOCTL_CREATE_PORT32:
                return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_CREATE_PORT, argp);
        case SNDRV_SEQ_IOCTL_DELETE_PORT32:
                return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_DELETE_PORT, argp);
        case SNDRV_SEQ_IOCTL_GET_PORT_INFO32:
                return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_GET_PORT_INFO, argp);
        case SNDRV_SEQ_IOCTL_SET_PORT_INFO32:
                return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_SET_PORT_INFO, argp);
        case SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT32:
                return snd_seq_call_port_info_ioctl(client, SNDRV_SEQ_IOCTL_QUERY_NEXT_PORT, argp);
        }
        return -ENOIOCTLCMD;
}