1/*
2 * This header, excluding the #ifdef __KERNEL__ part, is BSD licensed so
3 * anyone can use the definitions to implement compatible drivers/servers:
4 *
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of IBM nor the names of its contributors
15 *    may be used to endorse or promote products derived from this software
16 *    without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * Copyright (C) Red Hat, Inc., 2013-2015
30 * Copyright (C) Asias He <asias@redhat.com>, 2013
31 * Copyright (C) Stefan Hajnoczi <stefanha@redhat.com>, 2015
32 */
33
34#ifndef _UAPI_LINUX_VIRTIO_VSOCK_H
35#define _UAPI_LINUX_VIRTIO_VSOCK_H
36
37#include <linux/types.h>
38#include <linux/virtio_ids.h>
39#include <linux/virtio_config.h>
40
41/* The feature bitmap for virtio vsock */
42#define VIRTIO_VSOCK_F_SEQPACKET	1	/* SOCK_SEQPACKET supported */
43
44struct virtio_vsock_config {
45	__le64 guest_cid;
46} __attribute__((packed));
47
48enum virtio_vsock_event_id {
49	VIRTIO_VSOCK_EVENT_TRANSPORT_RESET = 0,
50};
51
52struct virtio_vsock_event {
53	__le32 id;
54} __attribute__((packed));
55
56struct virtio_vsock_hdr {
57	__le64	src_cid;
58	__le64	dst_cid;
59	__le32	src_port;
60	__le32	dst_port;
61	__le32	len;
62	__le16	type;		/* enum virtio_vsock_type */
63	__le16	op;		/* enum virtio_vsock_op */
64	__le32	flags;
65	__le32	buf_alloc;
66	__le32	fwd_cnt;
67} __attribute__((packed));
68
69enum virtio_vsock_type {
70	VIRTIO_VSOCK_TYPE_STREAM = 1,
71	VIRTIO_VSOCK_TYPE_SEQPACKET = 2,
72};
73
74enum virtio_vsock_op {
75	VIRTIO_VSOCK_OP_INVALID = 0,
76
77	/* Connect operations */
78	VIRTIO_VSOCK_OP_REQUEST = 1,
79	VIRTIO_VSOCK_OP_RESPONSE = 2,
80	VIRTIO_VSOCK_OP_RST = 3,
81	VIRTIO_VSOCK_OP_SHUTDOWN = 4,
82
83	/* To send payload */
84	VIRTIO_VSOCK_OP_RW = 5,
85
86	/* Tell the peer our credit info */
87	VIRTIO_VSOCK_OP_CREDIT_UPDATE = 6,
88	/* Request the peer to send the credit info to us */
89	VIRTIO_VSOCK_OP_CREDIT_REQUEST = 7,
90};
91
92/* VIRTIO_VSOCK_OP_SHUTDOWN flags values */
93enum virtio_vsock_shutdown {
94	VIRTIO_VSOCK_SHUTDOWN_RCV = 1,
95	VIRTIO_VSOCK_SHUTDOWN_SEND = 2,
96};
97
98/* VIRTIO_VSOCK_OP_RW flags values */
99enum virtio_vsock_rw {
100	VIRTIO_VSOCK_SEQ_EOM = 1,
101	VIRTIO_VSOCK_SEQ_EOR = 2,
102};
103
104#endif /* _UAPI_LINUX_VIRTIO_VSOCK_H */
105