Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#ifndef _LINUX_VIRTIO_VSOCK_H
2#define _LINUX_VIRTIO_VSOCK_H
3
4#include <uapi/linux/virtio_vsock.h>
5#include <linux/socket.h>
6#include <net/sock.h>
7#include <net/af_vsock.h>
8
9#define VIRTIO_VSOCK_DEFAULT_MIN_BUF_SIZE 128
10#define VIRTIO_VSOCK_DEFAULT_BUF_SIZE (1024 * 256)
11#define VIRTIO_VSOCK_DEFAULT_MAX_BUF_SIZE (1024 * 256)
12#define VIRTIO_VSOCK_DEFAULT_RX_BUF_SIZE (1024 * 4)
13#define VIRTIO_VSOCK_MAX_BUF_SIZE 0xFFFFFFFFUL
14#define VIRTIO_VSOCK_MAX_PKT_BUF_SIZE (1024 * 64)
15
16enum {
17 VSOCK_VQ_RX = 0, /* for host to guest data */
18 VSOCK_VQ_TX = 1, /* for guest to host data */
19 VSOCK_VQ_EVENT = 2,
20 VSOCK_VQ_MAX = 3,
21};
22
23/* Per-socket state (accessed via vsk->trans) */
24struct virtio_vsock_sock {
25 struct vsock_sock *vsk;
26
27 /* Protected by lock_sock(sk_vsock(trans->vsk)) */
28 u32 buf_size;
29 u32 buf_size_min;
30 u32 buf_size_max;
31
32 spinlock_t tx_lock;
33 spinlock_t rx_lock;
34
35 /* Protected by tx_lock */
36 u32 tx_cnt;
37 u32 buf_alloc;
38 u32 peer_fwd_cnt;
39 u32 peer_buf_alloc;
40
41 /* Protected by rx_lock */
42 u32 fwd_cnt;
43 u32 rx_bytes;
44 struct list_head rx_queue;
45};
46
47struct virtio_vsock_pkt {
48 struct virtio_vsock_hdr hdr;
49 struct work_struct work;
50 struct list_head list;
51 /* socket refcnt not held, only use for cancellation */
52 struct vsock_sock *vsk;
53 void *buf;
54 u32 len;
55 u32 off;
56 bool reply;
57};
58
59struct virtio_vsock_pkt_info {
60 u32 remote_cid, remote_port;
61 struct vsock_sock *vsk;
62 struct msghdr *msg;
63 u32 pkt_len;
64 u16 type;
65 u16 op;
66 u32 flags;
67 bool reply;
68};
69
70struct virtio_transport {
71 /* This must be the first field */
72 struct vsock_transport transport;
73
74 /* Takes ownership of the packet */
75 int (*send_pkt)(struct virtio_vsock_pkt *pkt);
76};
77
78ssize_t
79virtio_transport_stream_dequeue(struct vsock_sock *vsk,
80 struct msghdr *msg,
81 size_t len,
82 int type);
83int
84virtio_transport_dgram_dequeue(struct vsock_sock *vsk,
85 struct msghdr *msg,
86 size_t len, int flags);
87
88s64 virtio_transport_stream_has_data(struct vsock_sock *vsk);
89s64 virtio_transport_stream_has_space(struct vsock_sock *vsk);
90
91int virtio_transport_do_socket_init(struct vsock_sock *vsk,
92 struct vsock_sock *psk);
93u64 virtio_transport_get_buffer_size(struct vsock_sock *vsk);
94u64 virtio_transport_get_min_buffer_size(struct vsock_sock *vsk);
95u64 virtio_transport_get_max_buffer_size(struct vsock_sock *vsk);
96void virtio_transport_set_buffer_size(struct vsock_sock *vsk, u64 val);
97void virtio_transport_set_min_buffer_size(struct vsock_sock *vsk, u64 val);
98void virtio_transport_set_max_buffer_size(struct vsock_sock *vs, u64 val);
99int
100virtio_transport_notify_poll_in(struct vsock_sock *vsk,
101 size_t target,
102 bool *data_ready_now);
103int
104virtio_transport_notify_poll_out(struct vsock_sock *vsk,
105 size_t target,
106 bool *space_available_now);
107
108int virtio_transport_notify_recv_init(struct vsock_sock *vsk,
109 size_t target, struct vsock_transport_recv_notify_data *data);
110int virtio_transport_notify_recv_pre_block(struct vsock_sock *vsk,
111 size_t target, struct vsock_transport_recv_notify_data *data);
112int virtio_transport_notify_recv_pre_dequeue(struct vsock_sock *vsk,
113 size_t target, struct vsock_transport_recv_notify_data *data);
114int virtio_transport_notify_recv_post_dequeue(struct vsock_sock *vsk,
115 size_t target, ssize_t copied, bool data_read,
116 struct vsock_transport_recv_notify_data *data);
117int virtio_transport_notify_send_init(struct vsock_sock *vsk,
118 struct vsock_transport_send_notify_data *data);
119int virtio_transport_notify_send_pre_block(struct vsock_sock *vsk,
120 struct vsock_transport_send_notify_data *data);
121int virtio_transport_notify_send_pre_enqueue(struct vsock_sock *vsk,
122 struct vsock_transport_send_notify_data *data);
123int virtio_transport_notify_send_post_enqueue(struct vsock_sock *vsk,
124 ssize_t written, struct vsock_transport_send_notify_data *data);
125
126u64 virtio_transport_stream_rcvhiwat(struct vsock_sock *vsk);
127bool virtio_transport_stream_is_active(struct vsock_sock *vsk);
128bool virtio_transport_stream_allow(u32 cid, u32 port);
129int virtio_transport_dgram_bind(struct vsock_sock *vsk,
130 struct sockaddr_vm *addr);
131bool virtio_transport_dgram_allow(u32 cid, u32 port);
132
133int virtio_transport_connect(struct vsock_sock *vsk);
134
135int virtio_transport_shutdown(struct vsock_sock *vsk, int mode);
136
137void virtio_transport_release(struct vsock_sock *vsk);
138
139ssize_t
140virtio_transport_stream_enqueue(struct vsock_sock *vsk,
141 struct msghdr *msg,
142 size_t len);
143int
144virtio_transport_dgram_enqueue(struct vsock_sock *vsk,
145 struct sockaddr_vm *remote_addr,
146 struct msghdr *msg,
147 size_t len);
148
149void virtio_transport_destruct(struct vsock_sock *vsk);
150
151void virtio_transport_recv_pkt(struct virtio_vsock_pkt *pkt);
152void virtio_transport_free_pkt(struct virtio_vsock_pkt *pkt);
153void virtio_transport_inc_tx_pkt(struct virtio_vsock_sock *vvs, struct virtio_vsock_pkt *pkt);
154u32 virtio_transport_get_credit(struct virtio_vsock_sock *vvs, u32 wanted);
155void virtio_transport_put_credit(struct virtio_vsock_sock *vvs, u32 credit);
156void virtio_transport_deliver_tap_pkt(struct virtio_vsock_pkt *pkt);
157
158#endif /* _LINUX_VIRTIO_VSOCK_H */