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_MIN_BUF_SIZE 128
11 #define VIRTIO_VSOCK_DEFAULT_BUF_SIZE (1024 * 256)
12 #define VIRTIO_VSOCK_DEFAULT_MAX_BUF_SIZE (1024 * 256)
13 #define VIRTIO_VSOCK_DEFAULT_RX_BUF_SIZE (1024 * 4)
14 #define VIRTIO_VSOCK_MAX_BUF_SIZE 0xFFFFFFFFUL
15 #define VIRTIO_VSOCK_MAX_PKT_BUF_SIZE (1024 * 64)
18 VSOCK_VQ_RX = 0, /* for host to guest data */
19 VSOCK_VQ_TX = 1, /* for guest to host data */
24 /* Per-socket state (accessed via vsk->trans) */
25 struct virtio_vsock_sock {
26 struct vsock_sock *vsk;
28 /* Protected by lock_sock(sk_vsock(trans->vsk)) */
36 /* Protected by tx_lock */
42 /* Protected by rx_lock */
45 struct list_head rx_queue;
48 struct virtio_vsock_pkt {
49 struct virtio_vsock_hdr hdr;
50 struct work_struct work;
51 struct list_head list;
52 /* socket refcnt not held, only use for cancellation */
53 struct vsock_sock *vsk;
60 struct virtio_vsock_pkt_info {
61 u32 remote_cid, remote_port;
62 struct vsock_sock *vsk;
71 struct virtio_transport {
72 /* This must be the first field */
73 struct vsock_transport transport;
75 /* Takes ownership of the packet */
76 int (*send_pkt)(struct virtio_vsock_pkt *pkt);
80 virtio_transport_stream_dequeue(struct vsock_sock *vsk,
85 virtio_transport_dgram_dequeue(struct vsock_sock *vsk,
87 size_t len, int flags);
89 s64 virtio_transport_stream_has_data(struct vsock_sock *vsk);
90 s64 virtio_transport_stream_has_space(struct vsock_sock *vsk);
92 int virtio_transport_do_socket_init(struct vsock_sock *vsk,
93 struct vsock_sock *psk);
94 u64 virtio_transport_get_buffer_size(struct vsock_sock *vsk);
95 u64 virtio_transport_get_min_buffer_size(struct vsock_sock *vsk);
96 u64 virtio_transport_get_max_buffer_size(struct vsock_sock *vsk);
97 void virtio_transport_set_buffer_size(struct vsock_sock *vsk, u64 val);
98 void virtio_transport_set_min_buffer_size(struct vsock_sock *vsk, u64 val);
99 void virtio_transport_set_max_buffer_size(struct vsock_sock *vs, u64 val);
101 virtio_transport_notify_poll_in(struct vsock_sock *vsk,
103 bool *data_ready_now);
105 virtio_transport_notify_poll_out(struct vsock_sock *vsk,
107 bool *space_available_now);
109 int virtio_transport_notify_recv_init(struct vsock_sock *vsk,
110 size_t target, struct vsock_transport_recv_notify_data *data);
111 int virtio_transport_notify_recv_pre_block(struct vsock_sock *vsk,
112 size_t target, struct vsock_transport_recv_notify_data *data);
113 int virtio_transport_notify_recv_pre_dequeue(struct vsock_sock *vsk,
114 size_t target, struct vsock_transport_recv_notify_data *data);
115 int virtio_transport_notify_recv_post_dequeue(struct vsock_sock *vsk,
116 size_t target, ssize_t copied, bool data_read,
117 struct vsock_transport_recv_notify_data *data);
118 int virtio_transport_notify_send_init(struct vsock_sock *vsk,
119 struct vsock_transport_send_notify_data *data);
120 int virtio_transport_notify_send_pre_block(struct vsock_sock *vsk,
121 struct vsock_transport_send_notify_data *data);
122 int virtio_transport_notify_send_pre_enqueue(struct vsock_sock *vsk,
123 struct vsock_transport_send_notify_data *data);
124 int virtio_transport_notify_send_post_enqueue(struct vsock_sock *vsk,
125 ssize_t written, struct vsock_transport_send_notify_data *data);
127 u64 virtio_transport_stream_rcvhiwat(struct vsock_sock *vsk);
128 bool virtio_transport_stream_is_active(struct vsock_sock *vsk);
129 bool virtio_transport_stream_allow(u32 cid, u32 port);
130 int virtio_transport_dgram_bind(struct vsock_sock *vsk,
131 struct sockaddr_vm *addr);
132 bool virtio_transport_dgram_allow(u32 cid, u32 port);
134 int virtio_transport_connect(struct vsock_sock *vsk);
136 int virtio_transport_shutdown(struct vsock_sock *vsk, int mode);
138 void virtio_transport_release(struct vsock_sock *vsk);
141 virtio_transport_stream_enqueue(struct vsock_sock *vsk,
145 virtio_transport_dgram_enqueue(struct vsock_sock *vsk,
146 struct sockaddr_vm *remote_addr,
150 void virtio_transport_destruct(struct vsock_sock *vsk);
152 void virtio_transport_recv_pkt(struct virtio_transport *t,
153 struct virtio_vsock_pkt *pkt);
154 void virtio_transport_free_pkt(struct virtio_vsock_pkt *pkt);
155 void virtio_transport_inc_tx_pkt(struct virtio_vsock_sock *vvs, struct virtio_vsock_pkt *pkt);
156 u32 virtio_transport_get_credit(struct virtio_vsock_sock *vvs, u32 wanted);
157 void virtio_transport_put_credit(struct virtio_vsock_sock *vvs, u32 credit);
158 void virtio_transport_deliver_tap_pkt(struct virtio_vsock_pkt *pkt);
160 #endif /* _LINUX_VIRTIO_VSOCK_H */