245 lines
8.0 KiB
C
245 lines
8.0 KiB
C
/* 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 <net/sock.h>
|
|
#include <uapi/linux/vm_sockets.h>
|
|
|
|
#include "vsock_addr.h"
|
|
|
|
#define LAST_RESERVED_PORT 1023
|
|
|
|
#define VSOCK_HASH_SIZE 251
|
|
extern 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_connectible_has_data(struct vsock_sock *vsk);
|
|
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);
|
|
void vsock_data_ready(struct sock *sk);
|
|
|
|
/**** 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);
|
|
int (*set_rcvlowat)(struct vsock_sock *vsk, int val);
|
|
|
|
/* SEQ_PACKET. */
|
|
ssize_t (*seqpacket_dequeue)(struct vsock_sock *vsk, struct msghdr *msg,
|
|
int flags);
|
|
int (*seqpacket_enqueue)(struct vsock_sock *vsk, struct msghdr *msg,
|
|
size_t len);
|
|
bool (*seqpacket_allow)(u32 remote_cid);
|
|
u32 (*seqpacket_has_data)(struct vsock_sock *vsk);
|
|
|
|
/* 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);
|
|
|
|
/* Read a single skb */
|
|
int (*read_skb)(struct vsock_sock *, skb_read_actor_t);
|
|
};
|
|
|
|
/**** 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_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(struct vsock_transport *transport,
|
|
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_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);
|
|
int vsock_connectible_recvmsg(struct socket *sock, struct msghdr *msg, size_t len,
|
|
int flags);
|
|
int vsock_dgram_recvmsg(struct socket *sock, struct msghdr *msg,
|
|
size_t len, int flags);
|
|
|
|
#ifdef CONFIG_BPF_SYSCALL
|
|
extern struct proto vsock_proto;
|
|
int vsock_bpf_update_proto(struct sock *sk, struct sk_psock *psock, bool restore);
|
|
void __init vsock_bpf_build_proto(void);
|
|
#else
|
|
static inline void __init vsock_bpf_build_proto(void)
|
|
{}
|
|
#endif
|
|
|
|
#endif /* __AF_VSOCK_H__ */
|