include/standard-headers/linux/virtio_vsock.h

   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 "standard-headers/linux/types.h"
  38 #include "standard-headers/linux/virtio_ids.h"
  39 #include "standard-headers/linux/virtio_config.h"
  40
  41 /* The feature bitmap for virtio vsock */
  42 #define VIRTIO_VSOCK_F_SEQPACKET        1       /* SOCK_SEQPACKET supported */
  43
  44 struct virtio_vsock_config {
  45         uint64_t guest_cid;
  46 } QEMU_PACKED;
  47
  48 enum virtio_vsock_event_id {
  49         VIRTIO_VSOCK_EVENT_TRANSPORT_RESET = 0,
  50 };
  51
  52 struct virtio_vsock_event {
  53         uint32_t id;
  54 } QEMU_PACKED;
  55
  56 struct virtio_vsock_hdr {
  57         uint64_t        src_cid;
  58         uint64_t        dst_cid;
  59         uint32_t        src_port;
  60         uint32_t        dst_port;
  61         uint32_t        len;
  62         uint16_t        type;           /* enum virtio_vsock_type */
  63         uint16_t        op;             /* enum virtio_vsock_op */
  64         uint32_t        flags;
  65         uint32_t        buf_alloc;
  66         uint32_t        fwd_cnt;
  67 } QEMU_PACKED;
  68
  69 enum virtio_vsock_type {
  70         VIRTIO_VSOCK_TYPE_STREAM = 1,
  71         VIRTIO_VSOCK_TYPE_SEQPACKET = 2,
  72 };
  73
  74 enum 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 */
  93 enum virtio_vsock_shutdown {
  94         VIRTIO_VSOCK_SHUTDOWN_RCV = 1,
  95         VIRTIO_VSOCK_SHUTDOWN_SEND = 2,
  96 };
  97
  98 /* VIRTIO_VSOCK_OP_RW flags values */
  99 enum virtio_vsock_rw {
 100         VIRTIO_VSOCK_SEQ_EOM = 1,
 101         VIRTIO_VSOCK_SEQ_EOR = 2,
 102 };
 103
 104 #endif /* _LINUX_VIRTIO_VSOCK_H */