linux-headers (unknown)
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
44 struct virtio_vsock_config {
45 __le64 guest_cid;
46 } __attribute__((packed));
47
48 enum virtio_vsock_event_id {
49 VIRTIO_VSOCK_EVENT_TRANSPORT_RESET = 0,
50 };
51
52 struct virtio_vsock_event {
53 __le32 id;
54 } __attribute__((packed));
55
56 struct 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
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 */
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