cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

vmci_transport.h (3746B)

      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/*
      3 * VMware vSockets Driver
      4 *
      5 * Copyright (C) 2013 VMware, Inc. All rights reserved.
      6 */
      7
      8#ifndef _VMCI_TRANSPORT_H_
      9#define _VMCI_TRANSPORT_H_
     10
     11#include <linux/vmw_vmci_defs.h>
     12#include <linux/vmw_vmci_api.h>
     13
     14#include <net/vsock_addr.h>
     15#include <net/af_vsock.h>
     16
     17/* If the packet format changes in a release then this should change too. */
     18#define VMCI_TRANSPORT_PACKET_VERSION 1
     19
     20/* The resource ID on which control packets are sent. */
     21#define VMCI_TRANSPORT_PACKET_RID 1
     22
     23/* The resource ID on which control packets are sent to the hypervisor. */
     24#define VMCI_TRANSPORT_HYPERVISOR_PACKET_RID 15
     25
     26#define VSOCK_PROTO_INVALID        0
     27#define VSOCK_PROTO_PKT_ON_NOTIFY (1 << 0)
     28#define VSOCK_PROTO_ALL_SUPPORTED (VSOCK_PROTO_PKT_ON_NOTIFY)
     29
     30#define vmci_trans(_vsk) ((struct vmci_transport *)((_vsk)->trans))
     31
     32enum vmci_transport_packet_type {
     33	VMCI_TRANSPORT_PACKET_TYPE_INVALID = 0,
     34	VMCI_TRANSPORT_PACKET_TYPE_REQUEST,
     35	VMCI_TRANSPORT_PACKET_TYPE_NEGOTIATE,
     36	VMCI_TRANSPORT_PACKET_TYPE_OFFER,
     37	VMCI_TRANSPORT_PACKET_TYPE_ATTACH,
     38	VMCI_TRANSPORT_PACKET_TYPE_WROTE,
     39	VMCI_TRANSPORT_PACKET_TYPE_READ,
     40	VMCI_TRANSPORT_PACKET_TYPE_RST,
     41	VMCI_TRANSPORT_PACKET_TYPE_SHUTDOWN,
     42	VMCI_TRANSPORT_PACKET_TYPE_WAITING_WRITE,
     43	VMCI_TRANSPORT_PACKET_TYPE_WAITING_READ,
     44	VMCI_TRANSPORT_PACKET_TYPE_REQUEST2,
     45	VMCI_TRANSPORT_PACKET_TYPE_NEGOTIATE2,
     46	VMCI_TRANSPORT_PACKET_TYPE_MAX
     47};
     48
     49struct vmci_transport_waiting_info {
     50	u64 generation;
     51	u64 offset;
     52};
     53
     54/* Control packet type for STREAM sockets.  DGRAMs have no control packets nor
     55 * special packet header for data packets, they are just raw VMCI DGRAM
     56 * messages.  For STREAMs, control packets are sent over the control channel
     57 * while data is written and read directly from queue pairs with no packet
     58 * format.
     59 */
     60struct vmci_transport_packet {
     61	struct vmci_datagram dg;
     62	u8 version;
     63	u8 type;
     64	u16 proto;
     65	u32 src_port;
     66	u32 dst_port;
     67	u32 _reserved2;
     68	union {
     69		u64 size;
     70		u64 mode;
     71		struct vmci_handle handle;
     72		struct vmci_transport_waiting_info wait;
     73	} u;
     74};
     75
     76struct vmci_transport_notify_pkt {
     77	u64 write_notify_window;
     78	u64 write_notify_min_window;
     79	bool peer_waiting_read;
     80	bool peer_waiting_write;
     81	bool peer_waiting_write_detected;
     82	bool sent_waiting_read;
     83	bool sent_waiting_write;
     84	struct vmci_transport_waiting_info peer_waiting_read_info;
     85	struct vmci_transport_waiting_info peer_waiting_write_info;
     86	u64 produce_q_generation;
     87	u64 consume_q_generation;
     88};
     89
     90struct vmci_transport_notify_pkt_q_state {
     91	u64 write_notify_window;
     92	u64 write_notify_min_window;
     93	bool peer_waiting_write;
     94	bool peer_waiting_write_detected;
     95};
     96
     97union vmci_transport_notify {
     98	struct vmci_transport_notify_pkt pkt;
     99	struct vmci_transport_notify_pkt_q_state pkt_q_state;
    100};
    101
    102/* Our transport-specific data. */
    103struct vmci_transport {
    104	/* For DGRAMs. */
    105	struct vmci_handle dg_handle;
    106	/* For STREAMs. */
    107	struct vmci_handle qp_handle;
    108	struct vmci_qp *qpair;
    109	u64 produce_size;
    110	u64 consume_size;
    111	u32 detach_sub_id;
    112	union vmci_transport_notify notify;
    113	const struct vmci_transport_notify_ops *notify_ops;
    114	struct list_head elem;
    115	struct sock *sk;
    116	spinlock_t lock; /* protects sk. */
    117};
    118
    119int vmci_transport_register(void);
    120void vmci_transport_unregister(void);
    121
    122int vmci_transport_send_wrote_bh(struct sockaddr_vm *dst,
    123				 struct sockaddr_vm *src);
    124int vmci_transport_send_read_bh(struct sockaddr_vm *dst,
    125				struct sockaddr_vm *src);
    126int vmci_transport_send_wrote(struct sock *sk);
    127int vmci_transport_send_read(struct sock *sk);
    128int vmci_transport_send_waiting_write(struct sock *sk,
    129				      struct vmci_transport_waiting_info *wait);
    130int vmci_transport_send_waiting_read(struct sock *sk,
    131				     struct vmci_transport_waiting_info *wait);
    132
    133#endif