1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_VIRTIO_VSOCK_H
3 #define _LINUX_VIRTIO_VSOCK_H
5 #include <uapi/linux/virtio_vsock.h>
6 #include <linux/socket.h>
8 #include <net/af_vsock.h>
10 #define VIRTIO_VSOCK_DEFAULT_RX_BUF_SIZE (1024 * 4)
11 #define VIRTIO_VSOCK_MAX_BUF_SIZE 0xFFFFFFFFUL
12 #define VIRTIO_VSOCK_MAX_PKT_BUF_SIZE (1024 * 64)
15 VSOCK_VQ_RX = 0, /* for host to guest data */
16 VSOCK_VQ_TX = 1, /* for guest to host data */
21 /* Per-socket state (accessed via vsk->trans) */
22 struct virtio_vsock_sock {
23 struct vsock_sock *vsk;
28 /* Protected by tx_lock */
33 /* Protected by rx_lock */
38 struct list_head rx_queue;
42 struct virtio_vsock_pkt {
43 struct virtio_vsock_hdr hdr;
44 struct list_head list;
45 /* socket refcnt not held, only use for cancellation */
46 struct vsock_sock *vsk;
55 struct virtio_vsock_pkt_info {
56 u32 remote_cid, remote_port;
57 struct vsock_sock *vsk;
66 struct virtio_transport {
67 /* This must be the first field */
68 struct vsock_transport transport;
70 /* Takes ownership of the packet */
71 int (*send_pkt)(struct virtio_vsock_pkt *pkt);
75 virtio_transport_stream_dequeue(struct vsock_sock *vsk,
80 virtio_transport_dgram_dequeue(struct vsock_sock *vsk,
82 size_t len, int flags);
85 virtio_transport_seqpacket_enqueue(struct vsock_sock *vsk,
89 virtio_transport_seqpacket_dequeue(struct vsock_sock *vsk,
92 s64 virtio_transport_stream_has_data(struct vsock_sock *vsk);
93 s64 virtio_transport_stream_has_space(struct vsock_sock *vsk);
94 u32 virtio_transport_seqpacket_has_data(struct vsock_sock *vsk);
96 int virtio_transport_do_socket_init(struct vsock_sock *vsk,
97 struct vsock_sock *psk);
99 virtio_transport_notify_poll_in(struct vsock_sock *vsk,
101 bool *data_ready_now);
103 virtio_transport_notify_poll_out(struct vsock_sock *vsk,
105 bool *space_available_now);
107 int virtio_transport_notify_recv_init(struct vsock_sock *vsk,
108 size_t target, struct vsock_transport_recv_notify_data *data);
109 int virtio_transport_notify_recv_pre_block(struct vsock_sock *vsk,
110 size_t target, struct vsock_transport_recv_notify_data *data);
111 int virtio_transport_notify_recv_pre_dequeue(struct vsock_sock *vsk,
112 size_t target, struct vsock_transport_recv_notify_data *data);
113 int virtio_transport_notify_recv_post_dequeue(struct vsock_sock *vsk,
114 size_t target, ssize_t copied, bool data_read,
115 struct vsock_transport_recv_notify_data *data);
116 int virtio_transport_notify_send_init(struct vsock_sock *vsk,
117 struct vsock_transport_send_notify_data *data);
118 int virtio_transport_notify_send_pre_block(struct vsock_sock *vsk,
119 struct vsock_transport_send_notify_data *data);
120 int virtio_transport_notify_send_pre_enqueue(struct vsock_sock *vsk,
121 struct vsock_transport_send_notify_data *data);
122 int virtio_transport_notify_send_post_enqueue(struct vsock_sock *vsk,
123 ssize_t written, struct vsock_transport_send_notify_data *data);
124 void virtio_transport_notify_buffer_size(struct vsock_sock *vsk, u64 *val);
126 u64 virtio_transport_stream_rcvhiwat(struct vsock_sock *vsk);
127 bool virtio_transport_stream_is_active(struct vsock_sock *vsk);
128 bool virtio_transport_stream_allow(u32 cid, u32 port);
129 int virtio_transport_dgram_bind(struct vsock_sock *vsk,
130 struct sockaddr_vm *addr);
131 bool virtio_transport_dgram_allow(u32 cid, u32 port);
133 int virtio_transport_connect(struct vsock_sock *vsk);
135 int virtio_transport_shutdown(struct vsock_sock *vsk, int mode);
137 void virtio_transport_release(struct vsock_sock *vsk);
140 virtio_transport_stream_enqueue(struct vsock_sock *vsk,
144 virtio_transport_dgram_enqueue(struct vsock_sock *vsk,
145 struct sockaddr_vm *remote_addr,
149 void virtio_transport_destruct(struct vsock_sock *vsk);
151 void virtio_transport_recv_pkt(struct virtio_transport *t,
152 struct virtio_vsock_pkt *pkt);
153 void virtio_transport_free_pkt(struct virtio_vsock_pkt *pkt);
154 void virtio_transport_inc_tx_pkt(struct virtio_vsock_sock *vvs, struct virtio_vsock_pkt *pkt);
155 u32 virtio_transport_get_credit(struct virtio_vsock_sock *vvs, u32 wanted);
156 void virtio_transport_put_credit(struct virtio_vsock_sock *vvs, u32 credit);
157 void virtio_transport_deliver_tap_pkt(struct virtio_vsock_pkt *pkt);
159 #endif /* _LINUX_VIRTIO_VSOCK_H */