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/*
* Copyright 2022 Virtual Open Systems SAS.
*
* Authors:
* Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
*
* 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.
*/
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <sys/eventfd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <pthread.h>
#include <stdbool.h>
#include <sys/param.h>
#include <assert.h>
/* For socket */
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
/* Project header files */
#include "virtio_loopback.h"
#include "vhost_user_loopback.h"
#include "virtio_rng.h"
#include "vhost_user_rng.h"
#include "vhost_user_blk.h"
#include "vhost_user_input.h"
#ifdef DEBUG
#define DBG(...) printf("adapter: " __VA_ARGS__)
#else
#define DBG(...)
#endif /* DEBUG */
/* Global variables */
int client_sock;
struct vhost_dev *dev;
struct adapter_dev *adev;
struct vhost_user *vudev;
void vhost_user_adapter_init(void)
{
DBG("Setup adapter data structures\n");
/* Init vhost-user device */
vudev = (struct vhost_user *)malloc(sizeof(struct vhost_user));
/* Init vhost device */
dev = (struct vhost_dev *)malloc(sizeof(struct vhost_dev));
/* Init virtio device */
global_vdev = (VirtIODevice *)malloc(sizeof(VirtIODevice));
/* Init virtio bus */
global_vbus = (VirtioBus *)malloc(sizeof(VirtioBus));
global_vbus->vdev = global_vdev;
global_vdev->vbus = global_vbus;
/* Store virtio_dev reference into vhost_dev struct*/
dev->vdev = global_vdev;
/* Init adapter device */
adev = (struct adapter_dev *)malloc(sizeof(struct adapter_dev));
adev->vdev = dev;
adev->vudev = vudev;
adev->virtio_dev = global_vdev;
adev->vbus = global_vbus;
}
void client(char *sock_path)
{
int rc, len;
struct sockaddr_un client_sockaddr;
DBG("Create shared socket with vhost-user-device\n");
/* Initialize the struct to zero */
memset(&client_sockaddr, 0, sizeof(struct sockaddr_un));
/*
* Create a UNIX socket
*/
client_sock = socket(AF_UNIX, SOCK_STREAM, 0);
if (client_sock == -1) {
DBG("SOCKET ERROR\n");
exit(1);
}
/*
* Set up the UNIX sockaddr structure
* by using AF_UNIX for the family and
* giving it a filepath to connect.
*/
client_sockaddr.sun_family = AF_UNIX;
strcpy(client_sockaddr.sun_path, sock_path);
len = sizeof(client_sockaddr);
rc = connect(client_sock, (struct sockaddr *) &client_sockaddr, len);
if (rc == -1) {
DBG("CONNECT ERROR\n");
close(client_sock);
exit(1);
}
}
static void help_args(void)
{
printf("Run example:\n\t./adapter -s /path_to_socket/rng.sock\n");
}
int main(int argc, char **argv)
{
#ifdef VHOST_USER
/*
* Check if the user has provided a socket path.
* If not, print the help messages.
*/
if ((argc <= 2) || (strcmp(argv[1], "-s") != 0)) {
goto error_args;
}
/*
* Create the socket and connect to the backend.
* Enabled on vhost-user case
*/
client(argv[2]);
#endif
/* Initialize the adapter data structures */
vhost_user_adapter_init();
/* Initialize the virtio/vhost-user device */
#ifdef VHOST_USER
#ifdef VHOST_USER_INPUT_DEV
vhost_user_input_init(global_vdev); /* <-- Enable that for vhost-user-rng */
virtio_input_device_realize();
#endif /* VHOST_USER_INPUT_DEV */
#ifdef VHOST_USER_BLK_DEV
vhost_user_blk_realize(); /* <-- Enable that for vhost-user-blk */
#endif /* VHOST_USER_BLK_DEV */
#ifdef VHOST_USER_RNG_DEV
vhost_user_rng_realize(); /* <-- Enable that for vhost-user-rng */
#endif /* VHOST_USER_RNG_DEV */
#else /* VHOST_USER */
#ifdef VIRTIO_RNG
virtio_rng_realize(); /* <-- Enable that for simple rng */
#else /* VIRTIO_RNG */
DBG("You have not defined any device\n");
exit(1);
#endif /* VIRTIO_RNG */
#endif /* VHOST_USER */
/*
* Start loopback trasnport layer and communiation with the loopback driver
*/
virtio_loopback_start();
return 0;
error_args:
help_args();
return 1;
}
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