Commit | Line | Data |
---|---|---|
b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
06a8fc78 AH |
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, /* for host to guest data */ | |
19 | VSOCK_VQ_TX = 1, /* for guest to host data */ | |
20 | VSOCK_VQ_EVENT = 2, | |
21 | VSOCK_VQ_MAX = 3, | |
22 | }; | |
23 | ||
24 | /* Per-socket state (accessed via vsk->trans) */ | |
25 | struct virtio_vsock_sock { | |
26 | struct vsock_sock *vsk; | |
27 | ||
28 | /* Protected by lock_sock(sk_vsock(trans->vsk)) */ | |
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 | /* Protected by tx_lock */ | |
37 | u32 tx_cnt; | |
38 | u32 buf_alloc; | |
39 | u32 peer_fwd_cnt; | |
40 | u32 peer_buf_alloc; | |
41 | ||
42 | /* Protected by rx_lock */ | |
43 | u32 fwd_cnt; | |
44 | u32 rx_bytes; | |
45 | struct list_head rx_queue; | |
46 | }; | |
47 | ||
48 | struct virtio_vsock_pkt { | |
49 | struct virtio_vsock_hdr hdr; | |
50 | struct work_struct work; | |
51 | struct list_head list; | |
36d277ba PT |
52 | /* socket refcnt not held, only use for cancellation */ |
53 | struct vsock_sock *vsk; | |
06a8fc78 AH |
54 | void *buf; |
55 | u32 len; | |
56 | u32 off; | |
57 | bool reply; | |
58 | }; | |
59 | ||
60 | struct virtio_vsock_pkt_info { | |
61 | u32 remote_cid, remote_port; | |
36d277ba | 62 | struct vsock_sock *vsk; |
06a8fc78 AH |
63 | struct msghdr *msg; |
64 | u32 pkt_len; | |
65 | u16 type; | |
66 | u16 op; | |
67 | u32 flags; | |
68 | bool reply; | |
69 | }; | |
70 | ||
71 | struct virtio_transport { | |
72 | /* This must be the first field */ | |
73 | struct vsock_transport transport; | |
74 | ||
75 | /* Takes ownership of the packet */ | |
76 | int (*send_pkt)(struct virtio_vsock_pkt *pkt); | |
77 | }; | |
78 | ||
79 | ssize_t | |
80 | virtio_transport_stream_dequeue(struct vsock_sock *vsk, | |
81 | struct msghdr *msg, | |
82 | size_t len, | |
83 | int type); | |
84 | int | |
85 | virtio_transport_dgram_dequeue(struct vsock_sock *vsk, | |
86 | struct msghdr *msg, | |
87 | size_t len, int flags); | |
88 | ||
89 | s64 virtio_transport_stream_has_data(struct vsock_sock *vsk); | |
90 | s64 virtio_transport_stream_has_space(struct vsock_sock *vsk); | |
91 | ||
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); | |
100 | int | |
101 | virtio_transport_notify_poll_in(struct vsock_sock *vsk, | |
102 | size_t target, | |
103 | bool *data_ready_now); | |
104 | int | |
105 | virtio_transport_notify_poll_out(struct vsock_sock *vsk, | |
106 | size_t target, | |
107 | bool *space_available_now); | |
108 | ||
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); | |
126 | ||
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); | |
133 | ||
134 | int virtio_transport_connect(struct vsock_sock *vsk); | |
135 | ||
136 | int virtio_transport_shutdown(struct vsock_sock *vsk, int mode); | |
137 | ||
138 | void virtio_transport_release(struct vsock_sock *vsk); | |
139 | ||
140 | ssize_t | |
141 | virtio_transport_stream_enqueue(struct vsock_sock *vsk, | |
142 | struct msghdr *msg, | |
143 | size_t len); | |
144 | int | |
145 | virtio_transport_dgram_enqueue(struct vsock_sock *vsk, | |
146 | struct sockaddr_vm *remote_addr, | |
147 | struct msghdr *msg, | |
148 | size_t len); | |
149 | ||
150 | void virtio_transport_destruct(struct vsock_sock *vsk); | |
151 | ||
152 | void virtio_transport_recv_pkt(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); | |
82dfb540 | 157 | void virtio_transport_deliver_tap_pkt(struct virtio_vsock_pkt *pkt); |
06a8fc78 AH |
158 | |
159 | #endif /* _LINUX_VIRTIO_VSOCK_H */ |