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133 lines
3.7 KiB
133 lines
3.7 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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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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#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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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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