/* SPDX-License-Identifier: GPL-2.0-only *//* * VMware vSockets Driver * * Copyright (C) 2007-2013 VMware, Inc. All rights reserved. */ #ifndef __AF_VSOCK_H__#define __AF_VSOCK_H__ #include <linux/kernel.h>#include <linux/workqueue.h>#include <uapi/linux/vm_sockets.h> #include "vsock_addr.h" #define LAST_RESERVED_PORT 1023 #define VSOCK_HASH_SIZE         251extern struct list_head vsock_bind_table[VSOCK_HASH_SIZE + 1];extern struct list_head vsock_connected_table[VSOCK_HASH_SIZE];extern spinlock_t vsock_table_lock; #define vsock_sk(__sk)    ((struct vsock_sock *)__sk)#define sk_vsock(__vsk)   (&(__vsk)->sk) struct vsock_sock {	/* sk must be the first member. */	struct sock sk;	const struct vsock_transport *transport;	struct sockaddr_vm local_addr;	struct sockaddr_vm remote_addr;	/* Links for the global tables of bound and connected sockets. */	struct list_head bound_table;	struct list_head connected_table;	/* Accessed without the socket lock held. This means it can never be	 * modified outsided of socket create or destruct.	 */	bool trusted;	bool cached_peer_allow_dgram;	/* Dgram communication allowed to					 * cached peer?					 */	u32 cached_peer;  /* Context ID of last dgram destination check. */	const struct cred *owner;	/* Rest are SOCK_STREAM only. */	long connect_timeout;	/* Listening socket that this came from. */	struct sock *listener;	/* Used for pending list and accept queue during connection handshake.	 * The listening socket is the head for both lists.  Sockets created	 * for connection requests are placed in the pending list until they	 * are connected, at which point they are put in the accept queue list	 * so they can be accepted in accept().  If accept() cannot accept the	 * connection, it is marked as rejected so the cleanup function knows	 * to clean up the socket.	 */	struct list_head pending_links;	struct list_head accept_queue;	bool rejected;	struct delayed_work connect_work;	struct delayed_work pending_work;	struct delayed_work close_work;	bool close_work_scheduled;	u32 peer_shutdown;	bool sent_request;	bool ignore_connecting_rst; 	/* Protected by lock_sock(sk) */	u64 buffer_size;	u64 buffer_min_size;	u64 buffer_max_size; 	/* Private to transport. */	void *trans;}; s64 vsock_stream_has_data(struct vsock_sock *vsk);s64 vsock_stream_has_space(struct vsock_sock *vsk);struct sock *vsock_create_connected(struct sock *parent); /**** TRANSPORT ****/ struct vsock_transport_recv_notify_data {	u64 data1; /* Transport-defined. */	u64 data2; /* Transport-defined. */	bool notify_on_block;}; struct vsock_transport_send_notify_data {	u64 data1; /* Transport-defined. */	u64 data2; /* Transport-defined. */}; /* Transport features flags *//* Transport provides host->guest communication */#define VSOCK_TRANSPORT_F_H2G		0x00000001/* Transport provides guest->host communication */#define VSOCK_TRANSPORT_F_G2H		0x00000002/* Transport provides DGRAM communication */#define VSOCK_TRANSPORT_F_DGRAM		0x00000004/* Transport provides local (loopback) communication */#define VSOCK_TRANSPORT_F_LOCAL		0x00000008 struct vsock_transport {	struct module *module; 	/* Initialize/tear-down socket. */	int (*init)(struct vsock_sock *, struct vsock_sock *);	void (*destruct)(struct vsock_sock *);	void (*release)(struct vsock_sock *); 	/* Cancel all pending packets sent on vsock. */	int (*cancel_pkt)(struct vsock_sock *vsk); 	/* Connections. */	int (*connect)(struct vsock_sock *); 	/* DGRAM. */	int (*dgram_bind)(struct vsock_sock *, struct sockaddr_vm *);	int (*dgram_dequeue)(struct vsock_sock *vsk, struct msghdr *msg,			     size_t len, int flags);	int (*dgram_enqueue)(struct vsock_sock *, struct sockaddr_vm *,			     struct msghdr *, size_t len);	bool (*dgram_allow)(u32 cid, u32 port); 	/* STREAM. */	/* TODO: stream_bind() */	ssize_t (*stream_dequeue)(struct vsock_sock *, struct msghdr *,				  size_t len, int flags);	ssize_t (*stream_enqueue)(struct vsock_sock *, struct msghdr *,				  size_t len);	s64 (*stream_has_data)(struct vsock_sock *);	s64 (*stream_has_space)(struct vsock_sock *);	u64 (*stream_rcvhiwat)(struct vsock_sock *);	bool (*stream_is_active)(struct vsock_sock *);	bool (*stream_allow)(u32 cid, u32 port); 	/* Notification. */	int (*notify_poll_in)(struct vsock_sock *, size_t, bool *);	int (*notify_poll_out)(struct vsock_sock *, size_t, bool *);	int (*notify_recv_init)(struct vsock_sock *, size_t,		struct vsock_transport_recv_notify_data *);	int (*notify_recv_pre_block)(struct vsock_sock *, size_t,		struct vsock_transport_recv_notify_data *);	int (*notify_recv_pre_dequeue)(struct vsock_sock *, size_t,		struct vsock_transport_recv_notify_data *);	int (*notify_recv_post_dequeue)(struct vsock_sock *, size_t,		ssize_t, bool, struct vsock_transport_recv_notify_data *);	int (*notify_send_init)(struct vsock_sock *,		struct vsock_transport_send_notify_data *);	int (*notify_send_pre_block)(struct vsock_sock *,		struct vsock_transport_send_notify_data *);	int (*notify_send_pre_enqueue)(struct vsock_sock *,		struct vsock_transport_send_notify_data *);	int (*notify_send_post_enqueue)(struct vsock_sock *, ssize_t,		struct vsock_transport_send_notify_data *);	/* sk_lock held by the caller */	void (*notify_buffer_size)(struct vsock_sock *, u64 *); 	/* Shutdown. */	int (*shutdown)(struct vsock_sock *, int); 	/* Addressing. */	u32 (*get_local_cid)(void);}; /**** CORE ****/ int vsock_core_register(const struct vsock_transport *t, int features);void vsock_core_unregister(const struct vsock_transport *t); /* The transport may downcast this to access transport-specific functions */const struct vsock_transport *vsock_core_get_transport(struct vsock_sock *vsk); /**** UTILS ****/ /* vsock_table_lock must be held */static inline bool __vsock_in_bound_table(struct vsock_sock *vsk){	return !list_empty(&vsk->bound_table);} /* vsock_table_lock must be held */static inline bool __vsock_in_connected_table(struct vsock_sock *vsk){	return !list_empty(&vsk->connected_table);} void vsock_release_pending(struct sock *pending);void vsock_add_pending(struct sock *listener, struct sock *pending);void vsock_remove_pending(struct sock *listener, struct sock *pending);void vsock_enqueue_accept(struct sock *listener, struct sock *connected);void vsock_insert_connected(struct vsock_sock *vsk);void vsock_remove_bound(struct vsock_sock *vsk);void vsock_remove_connected(struct vsock_sock *vsk);struct sock *vsock_find_bound_socket(struct sockaddr_vm *addr);struct sock *vsock_find_connected_socket(struct sockaddr_vm *src,					 struct sockaddr_vm *dst);void vsock_remove_sock(struct vsock_sock *vsk);void vsock_for_each_connected_socket(void (*fn)(struct sock *sk));int vsock_assign_transport(struct vsock_sock *vsk, struct vsock_sock *psk);bool vsock_find_cid(unsigned int cid); /**** TAP ****/ struct vsock_tap {	struct net_device *dev;	struct module *module;	struct list_head list;}; int vsock_init_tap(void);int vsock_add_tap(struct vsock_tap *vt);int vsock_remove_tap(struct vsock_tap *vt);void vsock_deliver_tap(struct sk_buff *build_skb(void *opaque), void *opaque); #endif /* __AF_VSOCK_H__ */