145 lines
4.1 KiB
C
145 lines
4.1 KiB
C
/*
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* VMware vSockets Driver
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*
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* Copyright (C) 2013 VMware, Inc. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation version 2 and no later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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#ifndef _VMCI_TRANSPORT_H_
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#define _VMCI_TRANSPORT_H_
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#include <linux/vmw_vmci_defs.h>
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#include <linux/vmw_vmci_api.h>
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#include <net/vsock_addr.h>
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#include <net/af_vsock.h>
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/* If the packet format changes in a release then this should change too. */
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#define VMCI_TRANSPORT_PACKET_VERSION 1
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/* The resource ID on which control packets are sent. */
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#define VMCI_TRANSPORT_PACKET_RID 1
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/* The resource ID on which control packets are sent to the hypervisor. */
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#define VMCI_TRANSPORT_HYPERVISOR_PACKET_RID 15
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#define VSOCK_PROTO_INVALID 0
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#define VSOCK_PROTO_PKT_ON_NOTIFY (1 << 0)
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#define VSOCK_PROTO_ALL_SUPPORTED (VSOCK_PROTO_PKT_ON_NOTIFY)
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#define vmci_trans(_vsk) ((struct vmci_transport *)((_vsk)->trans))
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enum vmci_transport_packet_type {
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VMCI_TRANSPORT_PACKET_TYPE_INVALID = 0,
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VMCI_TRANSPORT_PACKET_TYPE_REQUEST,
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VMCI_TRANSPORT_PACKET_TYPE_NEGOTIATE,
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VMCI_TRANSPORT_PACKET_TYPE_OFFER,
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VMCI_TRANSPORT_PACKET_TYPE_ATTACH,
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VMCI_TRANSPORT_PACKET_TYPE_WROTE,
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VMCI_TRANSPORT_PACKET_TYPE_READ,
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VMCI_TRANSPORT_PACKET_TYPE_RST,
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VMCI_TRANSPORT_PACKET_TYPE_SHUTDOWN,
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VMCI_TRANSPORT_PACKET_TYPE_WAITING_WRITE,
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VMCI_TRANSPORT_PACKET_TYPE_WAITING_READ,
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VMCI_TRANSPORT_PACKET_TYPE_REQUEST2,
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VMCI_TRANSPORT_PACKET_TYPE_NEGOTIATE2,
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VMCI_TRANSPORT_PACKET_TYPE_MAX
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};
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struct vmci_transport_waiting_info {
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u64 generation;
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u64 offset;
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};
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/* Control packet type for STREAM sockets. DGRAMs have no control packets nor
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* special packet header for data packets, they are just raw VMCI DGRAM
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* messages. For STREAMs, control packets are sent over the control channel
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* while data is written and read directly from queue pairs with no packet
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* format.
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*/
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struct vmci_transport_packet {
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struct vmci_datagram dg;
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u8 version;
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u8 type;
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u16 proto;
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u32 src_port;
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u32 dst_port;
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u32 _reserved2;
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union {
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u64 size;
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u64 mode;
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struct vmci_handle handle;
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struct vmci_transport_waiting_info wait;
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} u;
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};
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struct vmci_transport_notify_pkt {
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u64 write_notify_window;
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u64 write_notify_min_window;
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bool peer_waiting_read;
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bool peer_waiting_write;
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bool peer_waiting_write_detected;
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bool sent_waiting_read;
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bool sent_waiting_write;
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struct vmci_transport_waiting_info peer_waiting_read_info;
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struct vmci_transport_waiting_info peer_waiting_write_info;
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u64 produce_q_generation;
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u64 consume_q_generation;
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};
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struct vmci_transport_notify_pkt_q_state {
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u64 write_notify_window;
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u64 write_notify_min_window;
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bool peer_waiting_write;
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bool peer_waiting_write_detected;
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};
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union vmci_transport_notify {
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struct vmci_transport_notify_pkt pkt;
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struct vmci_transport_notify_pkt_q_state pkt_q_state;
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};
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/* Our transport-specific data. */
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struct vmci_transport {
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/* For DGRAMs. */
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struct vmci_handle dg_handle;
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/* For STREAMs. */
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struct vmci_handle qp_handle;
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struct vmci_qp *qpair;
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u64 produce_size;
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u64 consume_size;
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u64 queue_pair_size;
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u64 queue_pair_min_size;
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u64 queue_pair_max_size;
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u32 detach_sub_id;
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union vmci_transport_notify notify;
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const struct vmci_transport_notify_ops *notify_ops;
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struct list_head elem;
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struct sock *sk;
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spinlock_t lock; /* protects sk. */
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};
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int vmci_transport_register(void);
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void vmci_transport_unregister(void);
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int vmci_transport_send_wrote_bh(struct sockaddr_vm *dst,
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struct sockaddr_vm *src);
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int vmci_transport_send_read_bh(struct sockaddr_vm *dst,
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struct sockaddr_vm *src);
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int vmci_transport_send_wrote(struct sock *sk);
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int vmci_transport_send_read(struct sock *sk);
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int vmci_transport_send_waiting_write(struct sock *sk,
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struct vmci_transport_waiting_info *wait);
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int vmci_transport_send_waiting_read(struct sock *sk,
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struct vmci_transport_waiting_info *wait);
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#endif
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