net/vmw_vsock/vmci_transport_notify.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * VMware vSockets Driver
   4  *
   5  * Copyright (C) 2009-2013 VMware, Inc. All rights reserved.
   6  */
   7
   8 #ifndef __VMCI_TRANSPORT_NOTIFY_H__
   9 #define __VMCI_TRANSPORT_NOTIFY_H__
  10
  11 #include <linux/types.h>
  12 #include <linux/vmw_vmci_defs.h>
  13 #include <linux/vmw_vmci_api.h>
  14 #include <linux/vm_sockets.h>
  15
  16 #include "vmci_transport.h"
  17
  18 /* Comment this out to compare with old protocol. */
  19 #define VSOCK_OPTIMIZATION_WAITING_NOTIFY 1
  20 #if defined(VSOCK_OPTIMIZATION_WAITING_NOTIFY)
  21 /* Comment this out to remove flow control for "new" protocol */
  22 #define VSOCK_OPTIMIZATION_FLOW_CONTROL 1
  23 #endif
  24
  25 #define VMCI_TRANSPORT_MAX_DGRAM_RESENDS       10
  26
  27 struct vmci_transport_recv_notify_data {
  28         u64 consume_head;
  29         u64 produce_tail;
  30         bool notify_on_block;
  31 };
  32
  33 struct vmci_transport_send_notify_data {
  34         u64 consume_head;
  35         u64 produce_tail;
  36 };
  37
  38 /* Socket notification callbacks. */
  39 struct vmci_transport_notify_ops {
  40         void (*socket_init) (struct sock *sk);
  41         void (*socket_destruct) (struct vsock_sock *vsk);
  42         int (*poll_in) (struct sock *sk, size_t target,
  43                           bool *data_ready_now);
  44         int (*poll_out) (struct sock *sk, size_t target,
  45                            bool *space_avail_now);
  46         void (*handle_notify_pkt) (struct sock *sk,
  47                                    struct vmci_transport_packet *pkt,
  48                                    bool bottom_half, struct sockaddr_vm *dst,
  49                                    struct sockaddr_vm *src,
  50                                    bool *pkt_processed);
  51         int (*recv_init) (struct sock *sk, size_t target,
  52                           struct vmci_transport_recv_notify_data *data);
  53         int (*recv_pre_block) (struct sock *sk, size_t target,
  54                                struct vmci_transport_recv_notify_data *data);
  55         int (*recv_pre_dequeue) (struct sock *sk, size_t target,
  56                                  struct vmci_transport_recv_notify_data *data);
  57         int (*recv_post_dequeue) (struct sock *sk, size_t target,
  58                                   ssize_t copied, bool data_read,
  59                                   struct vmci_transport_recv_notify_data *data);
  60         int (*send_init) (struct sock *sk,
  61                           struct vmci_transport_send_notify_data *data);
  62         int (*send_pre_block) (struct sock *sk,
  63                                struct vmci_transport_send_notify_data *data);
  64         int (*send_pre_enqueue) (struct sock *sk,
  65                                  struct vmci_transport_send_notify_data *data);
  66         int (*send_post_enqueue) (struct sock *sk, ssize_t written,
  67                                   struct vmci_transport_send_notify_data *data);
  68         void (*process_request) (struct sock *sk);
  69         void (*process_negotiate) (struct sock *sk);
  70 };
  71
  72 extern const struct vmci_transport_notify_ops vmci_transport_notify_pkt_ops;
  73 extern const
  74 struct vmci_transport_notify_ops vmci_transport_notify_pkt_q_state_ops;
  75
  76 #endif /* __VMCI_TRANSPORT_NOTIFY_H__ */