linux-imx

/*

 * (c) 2017 Stefano Stabellini <stefano@aporeto.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.

 */

​

#include <linux/inet.h>

#include <linux/kthread.h>

#include <linux/list.h>

#include <linux/radix-tree.h>

#include <linux/module.h>

#include <linux/semaphore.h>

#include <linux/wait.h>

#include <net/sock.h>

#include <net/inet_common.h>

#include <net/inet_connection_sock.h>

#include <net/request_sock.h>

​

#include <xen/events.h>

#include <xen/grant_table.h>

#include <xen/xen.h>

#include <xen/xenbus.h>

#include <xen/interface/io/pvcalls.h>

​

#define PVCALLS_VERSIONS "1"

#define MAX_RING_ORDER XENBUS_MAX_RING_GRANT_ORDER

​

struct pvcalls_back_global {

    struct list_head frontends;

    struct semaphore frontends_lock;

} pvcalls_back_global;

​

/*

 * Per-frontend data structure. It contains pointers to the command

 * ring, its event channel, a list of active sockets and a tree of

 * passive sockets.

 */

struct pvcalls_fedata {

    struct list_head list;

    struct xenbus_device *dev;

    struct xen_pvcalls_sring *sring;

    struct xen_pvcalls_back_ring ring;

    int irq;

    struct list_head socket_mappings;

    struct radix_tree_root socketpass_mappings;

    struct semaphore socket_lock;

};

​

struct pvcalls_ioworker {

    struct work_struct register_work;

    struct workqueue_struct *wq;

};

​

struct sock_mapping {

    struct list_head list;