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 _LINUX_VIRTIO_VSOCK_H
 35#define _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 /* _LINUX_VIRTIO_VSOCK_H */