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
  15 #include "vmci_transport.h"
  16
  17 /* Comment this out to compare with old protocol. */
  18 #define VSOCK_OPTIMIZATION_WAITING_NOTIFY 1
  19 #if defined(VSOCK_OPTIMIZATION_WAITING_NOTIFY)
  20 /* Comment this out to remove flow control for "new" protocol */
  21 #define VSOCK_OPTIMIZATION_FLOW_CONTROL 1
  22 #endif
  23
  24 #define VMCI_TRANSPORT_MAX_DGRAM_RESENDS       10
  25
  26 struct vmci_transport_recv_notify_data {
  27         u64 consume_head;
  28         u64 produce_tail;
  29         bool notify_on_block;
  30 };
  31
  32 struct vmci_transport_send_notify_data {
  33         u64 consume_head;
  34         u64 produce_tail;
  35 };
  36
  37 /* Socket notification callbacks. */
  38 struct vmci_transport_notify_ops {
  39         void (*socket_init) (struct sock *sk);
  40         void (*socket_destruct) (struct vsock_sock *vsk);
  41         int (*poll_in) (struct sock *sk, size_t target,
  42                           bool *data_ready_now);
  43         int (*poll_out) (struct sock *sk, size_t target,
  44                            bool *space_avail_now);
  45         void (*handle_notify_pkt) (struct sock *sk,
  46                                    struct vmci_transport_packet *pkt,
  47                                    bool bottom_half, struct sockaddr_vm *dst,
  48                                    struct sockaddr_vm *src,
  49                                    bool *pkt_processed);
  50         int (*recv_init) (struct sock *sk, size_t target,
  51                           struct vmci_transport_recv_notify_data *data);
  52         int (*recv_pre_block) (struct sock *sk, size_t target,
  53                                struct vmci_transport_recv_notify_data *data);
  54         int (*recv_pre_dequeue) (struct sock *sk, size_t target,
  55                                  struct vmci_transport_recv_notify_data *data);
  56         int (*recv_post_dequeue) (struct sock *sk, size_t target,
  57                                   ssize_t copied, bool data_read,
  58                                   struct vmci_transport_recv_notify_data *data);
  59         int (*send_init) (struct sock *sk,
  60                           struct vmci_transport_send_notify_data *data);
  61         int (*send_pre_block) (struct sock *sk,
  62                                struct vmci_transport_send_notify_data *data);
  63         int (*send_pre_enqueue) (struct sock *sk,
  64                                  struct vmci_transport_send_notify_data *data);
  65         int (*send_post_enqueue) (struct sock *sk, ssize_t written,
  66                                   struct vmci_transport_send_notify_data *data);
  67         void (*process_request) (struct sock *sk);
  68         void (*process_negotiate) (struct sock *sk);
  69 };
  70
  71 extern const struct vmci_transport_notify_ops vmci_transport_notify_pkt_ops;
  72 extern const
  73 struct vmci_transport_notify_ops vmci_transport_notify_pkt_q_state_ops;
  74
  75 #endif /* __VMCI_TRANSPORT_NOTIFY_H__ */