mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-16 05:47:35 +07:00
16320f363a
To allow canceling all packets of a connection. Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Jorgen Hansen <jhansen@vmware.com> Signed-off-by: Peng Tao <bergwolf@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
192 lines
6.5 KiB
C
192 lines
6.5 KiB
C
/*
|
|
* VMware vSockets Driver
|
|
*
|
|
* Copyright (C) 2007-2013 VMware, Inc. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the Free
|
|
* Software Foundation version 2 and no later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but WITHOUT
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
* more details.
|
|
*/
|
|
|
|
#ifndef __AF_VSOCK_H__
|
|
#define __AF_VSOCK_H__
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/workqueue.h>
|
|
#include <linux/vm_sockets.h>
|
|
|
|
#include "vsock_addr.h"
|
|
|
|
/* vsock-specific sock->sk_state constants */
|
|
#define VSOCK_SS_LISTEN 255
|
|
|
|
#define LAST_RESERVED_PORT 1023
|
|
|
|
#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;
|
|
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 dwork;
|
|
struct delayed_work close_work;
|
|
bool close_work_scheduled;
|
|
u32 peer_shutdown;
|
|
bool sent_request;
|
|
bool ignore_connecting_rst;
|
|
|
|
/* Private to transport. */
|
|
void *trans;
|
|
};
|
|
|
|
s64 vsock_stream_has_data(struct vsock_sock *vsk);
|
|
s64 vsock_stream_has_space(struct vsock_sock *vsk);
|
|
void vsock_pending_work(struct work_struct *work);
|
|
struct sock *__vsock_create(struct net *net,
|
|
struct socket *sock,
|
|
struct sock *parent,
|
|
gfp_t priority, unsigned short type, int kern);
|
|
|
|
/**** 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. */
|
|
};
|
|
|
|
struct vsock_transport {
|
|
/* 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 *);
|
|
|
|
/* Shutdown. */
|
|
int (*shutdown)(struct vsock_sock *, int);
|
|
|
|
/* Buffer sizes. */
|
|
void (*set_buffer_size)(struct vsock_sock *, u64);
|
|
void (*set_min_buffer_size)(struct vsock_sock *, u64);
|
|
void (*set_max_buffer_size)(struct vsock_sock *, u64);
|
|
u64 (*get_buffer_size)(struct vsock_sock *);
|
|
u64 (*get_min_buffer_size)(struct vsock_sock *);
|
|
u64 (*get_max_buffer_size)(struct vsock_sock *);
|
|
|
|
/* Addressing. */
|
|
u32 (*get_local_cid)(void);
|
|
};
|
|
|
|
/**** CORE ****/
|
|
|
|
int __vsock_core_init(const struct vsock_transport *t, struct module *owner);
|
|
static inline int vsock_core_init(const struct vsock_transport *t)
|
|
{
|
|
return __vsock_core_init(t, THIS_MODULE);
|
|
}
|
|
void vsock_core_exit(void);
|
|
|
|
/* The transport may downcast this to access transport-specific functions */
|
|
const struct vsock_transport *vsock_core_get_transport(void);
|
|
|
|
/**** UTILS ****/
|
|
|
|
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));
|
|
|
|
#endif /* __AF_VSOCK_H__ */
|