2 * VMware vSockets Driver
4 * Copyright (C) 2007-2013 VMware, Inc. All rights reserved.
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.
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
16 #ifndef __AF_VSOCK_H__
17 #define __AF_VSOCK_H__
19 #include <linux/kernel.h>
20 #include <linux/workqueue.h>
21 #include <linux/vm_sockets.h>
23 #include "vsock_addr.h"
25 #define LAST_RESERVED_PORT 1023
27 #define vsock_sk(__sk) ((struct vsock_sock *)__sk)
28 #define sk_vsock(__vsk) (&(__vsk)->sk)
31 /* sk must be the first member. */
33 struct sockaddr_vm local_addr;
34 struct sockaddr_vm remote_addr;
35 /* Links for the global tables of bound and connected sockets. */
36 struct list_head bound_table;
37 struct list_head connected_table;
38 /* Accessed without the socket lock held. This means it can never be
39 * modified outsided of socket create or destruct.
42 bool cached_peer_allow_dgram; /* Dgram communication allowed to
45 u32 cached_peer; /* Context ID of last dgram destination check. */
46 const struct cred *owner;
47 /* Rest are SOCK_STREAM only. */
49 /* Listening socket that this came from. */
50 struct sock *listener;
51 /* Used for pending list and accept queue during connection handshake.
52 * The listening socket is the head for both lists. Sockets created
53 * for connection requests are placed in the pending list until they
54 * are connected, at which point they are put in the accept queue list
55 * so they can be accepted in accept(). If accept() cannot accept the
56 * connection, it is marked as rejected so the cleanup function knows
57 * to clean up the socket.
59 struct list_head pending_links;
60 struct list_head accept_queue;
62 struct delayed_work dwork;
65 bool ignore_connecting_rst;
67 /* Private to transport. */
71 s64 vsock_stream_has_data(struct vsock_sock *vsk);
72 s64 vsock_stream_has_space(struct vsock_sock *vsk);
73 void vsock_pending_work(struct work_struct *work);
74 struct sock *__vsock_create(struct net *net,
77 gfp_t priority, unsigned short type);
81 struct vsock_transport_recv_notify_data {
82 u64 data1; /* Transport-defined. */
83 u64 data2; /* Transport-defined. */
87 struct vsock_transport_send_notify_data {
88 u64 data1; /* Transport-defined. */
89 u64 data2; /* Transport-defined. */
92 struct vsock_transport {
93 /* Initialize/tear-down socket. */
94 int (*init)(struct vsock_sock *, struct vsock_sock *);
95 void (*destruct)(struct vsock_sock *);
96 void (*release)(struct vsock_sock *);
99 int (*connect)(struct vsock_sock *);
102 int (*dgram_bind)(struct vsock_sock *, struct sockaddr_vm *);
103 int (*dgram_dequeue)(struct kiocb *kiocb, struct vsock_sock *vsk,
104 struct msghdr *msg, size_t len, int flags);
105 int (*dgram_enqueue)(struct vsock_sock *, struct sockaddr_vm *,
106 struct iovec *, size_t len);
107 bool (*dgram_allow)(u32 cid, u32 port);
110 /* TODO: stream_bind() */
111 ssize_t (*stream_dequeue)(struct vsock_sock *, struct iovec *,
112 size_t len, int flags);
113 ssize_t (*stream_enqueue)(struct vsock_sock *, struct iovec *,
115 s64 (*stream_has_data)(struct vsock_sock *);
116 s64 (*stream_has_space)(struct vsock_sock *);
117 u64 (*stream_rcvhiwat)(struct vsock_sock *);
118 bool (*stream_is_active)(struct vsock_sock *);
119 bool (*stream_allow)(u32 cid, u32 port);
122 int (*notify_poll_in)(struct vsock_sock *, size_t, bool *);
123 int (*notify_poll_out)(struct vsock_sock *, size_t, bool *);
124 int (*notify_recv_init)(struct vsock_sock *, size_t,
125 struct vsock_transport_recv_notify_data *);
126 int (*notify_recv_pre_block)(struct vsock_sock *, size_t,
127 struct vsock_transport_recv_notify_data *);
128 int (*notify_recv_pre_dequeue)(struct vsock_sock *, size_t,
129 struct vsock_transport_recv_notify_data *);
130 int (*notify_recv_post_dequeue)(struct vsock_sock *, size_t,
131 ssize_t, bool, struct vsock_transport_recv_notify_data *);
132 int (*notify_send_init)(struct vsock_sock *,
133 struct vsock_transport_send_notify_data *);
134 int (*notify_send_pre_block)(struct vsock_sock *,
135 struct vsock_transport_send_notify_data *);
136 int (*notify_send_pre_enqueue)(struct vsock_sock *,
137 struct vsock_transport_send_notify_data *);
138 int (*notify_send_post_enqueue)(struct vsock_sock *, ssize_t,
139 struct vsock_transport_send_notify_data *);
142 int (*shutdown)(struct vsock_sock *, int);
145 void (*set_buffer_size)(struct vsock_sock *, u64);
146 void (*set_min_buffer_size)(struct vsock_sock *, u64);
147 void (*set_max_buffer_size)(struct vsock_sock *, u64);
148 u64 (*get_buffer_size)(struct vsock_sock *);
149 u64 (*get_min_buffer_size)(struct vsock_sock *);
150 u64 (*get_max_buffer_size)(struct vsock_sock *);
153 u32 (*get_local_cid)(void);
158 int vsock_core_init(const struct vsock_transport *t);
159 void vsock_core_exit(void);
163 void vsock_release_pending(struct sock *pending);
164 void vsock_add_pending(struct sock *listener, struct sock *pending);
165 void vsock_remove_pending(struct sock *listener, struct sock *pending);
166 void vsock_enqueue_accept(struct sock *listener, struct sock *connected);
167 void vsock_insert_connected(struct vsock_sock *vsk);
168 void vsock_remove_bound(struct vsock_sock *vsk);
169 void vsock_remove_connected(struct vsock_sock *vsk);
170 struct sock *vsock_find_bound_socket(struct sockaddr_vm *addr);
171 struct sock *vsock_find_connected_socket(struct sockaddr_vm *src,
172 struct sockaddr_vm *dst);
173 void vsock_for_each_connected_socket(void (*fn)(struct sock *sk));
175 #endif /* __AF_VSOCK_H__ */