1
2 #ifndef _LINUX_VIRTIO_VSOCK_H
3 #define _LINUX_VIRTIO_VSOCK_H
4
5 #include <uapi/linux/virtio_vsock.h>
6 #include <linux/socket.h>
7 #include <net/sock.h>
8 #include <net/af_vsock.h>
9
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)
16
17 enum {
18 VSOCK_VQ_RX = 0,
19 VSOCK_VQ_TX = 1,
20 VSOCK_VQ_EVENT = 2,
21 VSOCK_VQ_MAX = 3,
22 };
23
24
25 struct virtio_vsock_sock {
26 struct vsock_sock *vsk;
27
28
29 u32 buf_size;
30 u32 buf_size_min;
31 u32 buf_size_max;
32
33 spinlock_t tx_lock;
34 spinlock_t rx_lock;
35
36
37 u32 tx_cnt;
38 u32 peer_fwd_cnt;
39 u32 peer_buf_alloc;
40
41
42 u32 fwd_cnt;
43 u32 last_fwd_cnt;
44 u32 rx_bytes;
45 u32 buf_alloc;
46 struct list_head rx_queue;
47 };
48
49 struct virtio_vsock_pkt {
50 struct virtio_vsock_hdr hdr;
51 struct list_head list;
52
53 struct vsock_sock *vsk;
54 void *buf;
55 u32 buf_len;
56 u32 len;
57 u32 off;
58 bool reply;
59 };
60
61 struct virtio_vsock_pkt_info {
62 u32 remote_cid, remote_port;
63 struct vsock_sock *vsk;
64 struct msghdr *msg;
65 u32 pkt_len;
66 u16 type;
67 u16 op;
68 u32 flags;
69 bool reply;
70 };
71
72 struct virtio_transport {
73
74 struct vsock_transport transport;
75
76
77 int (*send_pkt)(struct virtio_vsock_pkt *pkt);
78 };
79
80 ssize_t
81 virtio_transport_stream_dequeue(struct vsock_sock *vsk,
82 struct msghdr *msg,
83 size_t len,
84 int type);
85 int
86 virtio_transport_dgram_dequeue(struct vsock_sock *vsk,
87 struct msghdr *msg,
88 size_t len, int flags);
89
90 s64 virtio_transport_stream_has_data(struct vsock_sock *vsk);
91 s64 virtio_transport_stream_has_space(struct vsock_sock *vsk);
92
93 int virtio_transport_do_socket_init(struct vsock_sock *vsk,
94 struct vsock_sock *psk);
95 u64 virtio_transport_get_buffer_size(struct vsock_sock *vsk);
96 u64 virtio_transport_get_min_buffer_size(struct vsock_sock *vsk);
97 u64 virtio_transport_get_max_buffer_size(struct vsock_sock *vsk);
98 void virtio_transport_set_buffer_size(struct vsock_sock *vsk, u64 val);
99 void virtio_transport_set_min_buffer_size(struct vsock_sock *vsk, u64 val);
100 void virtio_transport_set_max_buffer_size(struct vsock_sock *vs, u64 val);
101 int
102 virtio_transport_notify_poll_in(struct vsock_sock *vsk,
103 size_t target,
104 bool *data_ready_now);
105 int
106 virtio_transport_notify_poll_out(struct vsock_sock *vsk,
107 size_t target,
108 bool *space_available_now);
109
110 int virtio_transport_notify_recv_init(struct vsock_sock *vsk,
111 size_t target, struct vsock_transport_recv_notify_data *data);
112 int virtio_transport_notify_recv_pre_block(struct vsock_sock *vsk,
113 size_t target, struct vsock_transport_recv_notify_data *data);
114 int virtio_transport_notify_recv_pre_dequeue(struct vsock_sock *vsk,
115 size_t target, struct vsock_transport_recv_notify_data *data);
116 int virtio_transport_notify_recv_post_dequeue(struct vsock_sock *vsk,
117 size_t target, ssize_t copied, bool data_read,
118 struct vsock_transport_recv_notify_data *data);
119 int virtio_transport_notify_send_init(struct vsock_sock *vsk,
120 struct vsock_transport_send_notify_data *data);
121 int virtio_transport_notify_send_pre_block(struct vsock_sock *vsk,
122 struct vsock_transport_send_notify_data *data);
123 int virtio_transport_notify_send_pre_enqueue(struct vsock_sock *vsk,
124 struct vsock_transport_send_notify_data *data);
125 int virtio_transport_notify_send_post_enqueue(struct vsock_sock *vsk,
126 ssize_t written, struct vsock_transport_send_notify_data *data);
127
128 u64 virtio_transport_stream_rcvhiwat(struct vsock_sock *vsk);
129 bool virtio_transport_stream_is_active(struct vsock_sock *vsk);
130 bool virtio_transport_stream_allow(u32 cid, u32 port);
131 int virtio_transport_dgram_bind(struct vsock_sock *vsk,
132 struct sockaddr_vm *addr);
133 bool virtio_transport_dgram_allow(u32 cid, u32 port);
134
135 int virtio_transport_connect(struct vsock_sock *vsk);
136
137 int virtio_transport_shutdown(struct vsock_sock *vsk, int mode);
138
139 void virtio_transport_release(struct vsock_sock *vsk);
140
141 ssize_t
142 virtio_transport_stream_enqueue(struct vsock_sock *vsk,
143 struct msghdr *msg,
144 size_t len);
145 int
146 virtio_transport_dgram_enqueue(struct vsock_sock *vsk,
147 struct sockaddr_vm *remote_addr,
148 struct msghdr *msg,
149 size_t len);
150
151 void virtio_transport_destruct(struct vsock_sock *vsk);
152
153 void virtio_transport_recv_pkt(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);
159
160 #endif