LXR linux/net/vmw_vsock/vmci_transport

   1/*
   2 * VMware vSockets Driver
   3 *
   4 * Copyright (C) 2009-2013 VMware, Inc. All rights reserved.
   5 *
   6 * This program is free software; you can redistribute it and/or modify it
   7 * under the terms of the GNU General Public License as published by the Free
   8 * Software Foundation version 2 and no later version.
   9 *
  10 * This program is distributed in the hope that it will be useful, but WITHOUT
  11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13 * more details.
  14 */
  15
  16#ifndef __VMCI_TRANSPORT_NOTIFY_H__
  17#define __VMCI_TRANSPORT_NOTIFY_H__
  18
  19#include <linux/types.h>
  20#include <linux/vmw_vmci_defs.h>
  21#include <linux/vmw_vmci_api.h>
  22#include <linux/vm_sockets.h>
  23
  24#include "vmci_transport.h"
  25
  26/* Comment this out to compare with old protocol. */
  27#define VSOCK_OPTIMIZATION_WAITING_NOTIFY 1
  28#if defined(VSOCK_OPTIMIZATION_WAITING_NOTIFY)
  29/* Comment this out to remove flow control for "new" protocol */
  30#define VSOCK_OPTIMIZATION_FLOW_CONTROL 1
  31#endif
  32
  33#define VMCI_TRANSPORT_MAX_DGRAM_RESENDS       10
  34
  35struct vmci_transport_recv_notify_data {
  36        u64 consume_head;
  37        u64 produce_tail;
  38        bool notify_on_block;
  39};
  40
  41struct vmci_transport_send_notify_data {
  42        u64 consume_head;
  43        u64 produce_tail;
  44};
  45
  46/* Socket notification callbacks. */
  47struct vmci_transport_notify_ops {
  48        void (*socket_init) (struct sock *sk);
  49        void (*socket_destruct) (struct vsock_sock *vsk);
  50        int (*poll_in) (struct sock *sk, size_t target,
  51                          bool *data_ready_now);
  52        int (*poll_out) (struct sock *sk, size_t target,
  53                           bool *space_avail_now);
  54        void (*handle_notify_pkt) (struct sock *sk,
  55                                   struct vmci_transport_packet *pkt,
  56                                   bool bottom_half, struct sockaddr_vm *dst,
  57                                   struct sockaddr_vm *src,
  58                                   bool *pkt_processed);
  59        int (*recv_init) (struct sock *sk, size_t target,
  60                          struct vmci_transport_recv_notify_data *data);
  61        int (*recv_pre_block) (struct sock *sk, size_t target,
  62                               struct vmci_transport_recv_notify_data *data);
  63        int (*recv_pre_dequeue) (struct sock *sk, size_t target,
  64                                 struct vmci_transport_recv_notify_data *data);
  65        int (*recv_post_dequeue) (struct sock *sk, size_t target,
  66                                  ssize_t copied, bool data_read,
  67                                  struct vmci_transport_recv_notify_data *data);
  68        int (*send_init) (struct sock *sk,
  69                          struct vmci_transport_send_notify_data *data);
  70        int (*send_pre_block) (struct sock *sk,
  71                               struct vmci_transport_send_notify_data *data);
  72        int (*send_pre_enqueue) (struct sock *sk,
  73                                 struct vmci_transport_send_notify_data *data);
  74        int (*send_post_enqueue) (struct sock *sk, ssize_t written,
  75                                  struct vmci_transport_send_notify_data *data);
  76        void (*process_request) (struct sock *sk);
  77        void (*process_negotiate) (struct sock *sk);
  78};
  79
  80extern struct vmci_transport_notify_ops vmci_transport_notify_pkt_ops;
  81extern struct vmci_transport_notify_ops vmci_transport_notify_pkt_q_state_ops;
  82
  83#endif /* __VMCI_TRANSPORT_NOTIFY_H__ */
  84