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
26struct vmci_transport_recv_notify_data {
27	u64 consume_head;
28	u64 produce_tail;
29	bool notify_on_block;
30};
31
32struct vmci_transport_send_notify_data {
33	u64 consume_head;
34	u64 produce_tail;
35};
36
37/* Socket notification callbacks. */
38struct 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
71extern const struct vmci_transport_notify_ops vmci_transport_notify_pkt_ops;
72extern const
73struct vmci_transport_notify_ops vmci_transport_notify_pkt_q_state_ops;
74
75#endif /* __VMCI_TRANSPORT_NOTIFY_H__ */
76