1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * VMware vSockets Driver
5 * Copyright (C) 2007-2013 VMware, Inc. All rights reserved.
11 #include <linux/kernel.h>
12 #include <linux/workqueue.h>
13 #include <uapi/linux/vm_sockets.h>
15 #include "vsock_addr.h"
17 #define LAST_RESERVED_PORT 1023
19 #define VSOCK_HASH_SIZE 251
20 extern struct list_head vsock_bind_table[VSOCK_HASH_SIZE + 1];
21 extern struct list_head vsock_connected_table[VSOCK_HASH_SIZE];
22 extern spinlock_t vsock_table_lock;
24 #define vsock_sk(__sk) ((struct vsock_sock *)__sk)
25 #define sk_vsock(__vsk) (&(__vsk)->sk)
28 /* sk must be the first member. */
30 const struct vsock_transport *transport;
31 struct sockaddr_vm local_addr;
32 struct sockaddr_vm remote_addr;
33 /* Links for the global tables of bound and connected sockets. */
34 struct list_head bound_table;
35 struct list_head connected_table;
36 /* Accessed without the socket lock held. This means it can never be
37 * modified outsided of socket create or destruct.
40 bool cached_peer_allow_dgram; /* Dgram communication allowed to
43 u32 cached_peer; /* Context ID of last dgram destination check. */
44 const struct cred *owner;
45 /* Rest are SOCK_STREAM only. */
47 /* Listening socket that this came from. */
48 struct sock *listener;
49 /* Used for pending list and accept queue during connection handshake.
50 * The listening socket is the head for both lists. Sockets created
51 * for connection requests are placed in the pending list until they
52 * are connected, at which point they are put in the accept queue list
53 * so they can be accepted in accept(). If accept() cannot accept the
54 * connection, it is marked as rejected so the cleanup function knows
55 * to clean up the socket.
57 struct list_head pending_links;
58 struct list_head accept_queue;
60 struct delayed_work connect_work;
61 struct delayed_work pending_work;
62 struct delayed_work close_work;
63 bool close_work_scheduled;
66 bool ignore_connecting_rst;
68 /* Protected by lock_sock(sk) */
73 /* Private to transport. */
77 s64 vsock_stream_has_data(struct vsock_sock *vsk);
78 s64 vsock_stream_has_space(struct vsock_sock *vsk);
79 struct sock *vsock_create_connected(struct sock *parent);
83 struct vsock_transport_recv_notify_data {
84 u64 data1; /* Transport-defined. */
85 u64 data2; /* Transport-defined. */
89 struct vsock_transport_send_notify_data {
90 u64 data1; /* Transport-defined. */
91 u64 data2; /* Transport-defined. */
94 struct vsock_transport {
95 /* Initialize/tear-down socket. */
96 int (*init)(struct vsock_sock *, struct vsock_sock *);
97 void (*destruct)(struct vsock_sock *);
98 void (*release)(struct vsock_sock *);
100 /* Cancel all pending packets sent on vsock. */
101 int (*cancel_pkt)(struct vsock_sock *vsk);
104 int (*connect)(struct vsock_sock *);
107 int (*dgram_bind)(struct vsock_sock *, struct sockaddr_vm *);
108 int (*dgram_dequeue)(struct vsock_sock *vsk, struct msghdr *msg,
109 size_t len, int flags);
110 int (*dgram_enqueue)(struct vsock_sock *, struct sockaddr_vm *,
111 struct msghdr *, size_t len);
112 bool (*dgram_allow)(u32 cid, u32 port);
115 /* TODO: stream_bind() */
116 ssize_t (*stream_dequeue)(struct vsock_sock *, struct msghdr *,
117 size_t len, int flags);
118 ssize_t (*stream_enqueue)(struct vsock_sock *, struct msghdr *,
120 s64 (*stream_has_data)(struct vsock_sock *);
121 s64 (*stream_has_space)(struct vsock_sock *);
122 u64 (*stream_rcvhiwat)(struct vsock_sock *);
123 bool (*stream_is_active)(struct vsock_sock *);
124 bool (*stream_allow)(u32 cid, u32 port);
127 int (*notify_poll_in)(struct vsock_sock *, size_t, bool *);
128 int (*notify_poll_out)(struct vsock_sock *, size_t, bool *);
129 int (*notify_recv_init)(struct vsock_sock *, size_t,
130 struct vsock_transport_recv_notify_data *);
131 int (*notify_recv_pre_block)(struct vsock_sock *, size_t,
132 struct vsock_transport_recv_notify_data *);
133 int (*notify_recv_pre_dequeue)(struct vsock_sock *, size_t,
134 struct vsock_transport_recv_notify_data *);
135 int (*notify_recv_post_dequeue)(struct vsock_sock *, size_t,
136 ssize_t, bool, struct vsock_transport_recv_notify_data *);
137 int (*notify_send_init)(struct vsock_sock *,
138 struct vsock_transport_send_notify_data *);
139 int (*notify_send_pre_block)(struct vsock_sock *,
140 struct vsock_transport_send_notify_data *);
141 int (*notify_send_pre_enqueue)(struct vsock_sock *,
142 struct vsock_transport_send_notify_data *);
143 int (*notify_send_post_enqueue)(struct vsock_sock *, ssize_t,
144 struct vsock_transport_send_notify_data *);
145 /* sk_lock held by the caller */
146 void (*notify_buffer_size)(struct vsock_sock *, u64 *);
149 int (*shutdown)(struct vsock_sock *, int);
152 u32 (*get_local_cid)(void);
157 int __vsock_core_init(const struct vsock_transport *t, struct module *owner);
158 static inline int vsock_core_init(const struct vsock_transport *t)
160 return __vsock_core_init(t, THIS_MODULE);
162 void vsock_core_exit(void);
164 /* The transport may downcast this to access transport-specific functions */
165 const struct vsock_transport *vsock_core_get_transport(struct vsock_sock *vsk);
169 /* vsock_table_lock must be held */
170 static inline bool __vsock_in_bound_table(struct vsock_sock *vsk)
172 return !list_empty(&vsk->bound_table);
175 /* vsock_table_lock must be held */
176 static inline bool __vsock_in_connected_table(struct vsock_sock *vsk)
178 return !list_empty(&vsk->connected_table);
181 void vsock_release_pending(struct sock *pending);
182 void vsock_add_pending(struct sock *listener, struct sock *pending);
183 void vsock_remove_pending(struct sock *listener, struct sock *pending);
184 void vsock_enqueue_accept(struct sock *listener, struct sock *connected);
185 void vsock_insert_connected(struct vsock_sock *vsk);
186 void vsock_remove_bound(struct vsock_sock *vsk);
187 void vsock_remove_connected(struct vsock_sock *vsk);
188 struct sock *vsock_find_bound_socket(struct sockaddr_vm *addr);
189 struct sock *vsock_find_connected_socket(struct sockaddr_vm *src,
190 struct sockaddr_vm *dst);
191 void vsock_remove_sock(struct vsock_sock *vsk);
192 void vsock_for_each_connected_socket(void (*fn)(struct sock *sk));
197 struct net_device *dev;
198 struct module *module;
199 struct list_head list;
202 int vsock_init_tap(void);
203 int vsock_add_tap(struct vsock_tap *vt);
204 int vsock_remove_tap(struct vsock_tap *vt);
205 void vsock_deliver_tap(struct sk_buff *build_skb(void *opaque), void *opaque);
207 #endif /* __AF_VSOCK_H__ */