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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 | ||
06a8fc78 AH |
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) | |
13 | ||
14 | enum { | |
15 | VSOCK_VQ_RX = 0, /* for host to guest data */ | |
16 | VSOCK_VQ_TX = 1, /* for guest to host data */ | |
17 | VSOCK_VQ_EVENT = 2, | |
18 | VSOCK_VQ_MAX = 3, | |
19 | }; | |
20 | ||
21 | /* Per-socket state (accessed via vsk->trans) */ | |
22 | struct virtio_vsock_sock { | |
23 | struct vsock_sock *vsk; | |
24 | ||
06a8fc78 AH |
25 | spinlock_t tx_lock; |
26 | spinlock_t rx_lock; | |
27 | ||
28 | /* Protected by tx_lock */ | |
29 | u32 tx_cnt; | |
06a8fc78 AH |
30 | u32 peer_fwd_cnt; |
31 | u32 peer_buf_alloc; | |
32 | ||
33 | /* Protected by rx_lock */ | |
34 | u32 fwd_cnt; | |
b89d882d | 35 | u32 last_fwd_cnt; |
06a8fc78 | 36 | u32 rx_bytes; |
9632e9f6 | 37 | u32 buf_alloc; |
06a8fc78 AH |
38 | struct list_head rx_queue; |
39 | }; | |
40 | ||
41 | struct virtio_vsock_pkt { | |
42 | struct virtio_vsock_hdr hdr; | |
06a8fc78 | 43 | struct list_head list; |
36d277ba PT |
44 | /* socket refcnt not held, only use for cancellation */ |
45 | struct vsock_sock *vsk; | |
06a8fc78 | 46 | void *buf; |
473c7391 | 47 | u32 buf_len; |
06a8fc78 AH |
48 | u32 len; |
49 | u32 off; | |
50 | bool reply; | |
a78d1639 | 51 | bool tap_delivered; |
06a8fc78 AH |
52 | }; |
53 | ||
54 | struct virtio_vsock_pkt_info { | |
55 | u32 remote_cid, remote_port; | |
36d277ba | 56 | struct vsock_sock *vsk; |
06a8fc78 AH |
57 | struct msghdr *msg; |
58 | u32 pkt_len; | |
59 | u16 type; | |
60 | u16 op; | |
61 | u32 flags; | |
62 | bool reply; | |
63 | }; | |
64 | ||
65 | struct virtio_transport { | |
66 | /* This must be the first field */ | |
67 | struct vsock_transport transport; | |
68 | ||
69 | /* Takes ownership of the packet */ | |
70 | int (*send_pkt)(struct virtio_vsock_pkt *pkt); | |
71 | }; | |
72 | ||
73 | ssize_t | |
74 | virtio_transport_stream_dequeue(struct vsock_sock *vsk, | |
75 | struct msghdr *msg, | |
76 | size_t len, | |
77 | int type); | |
78 | int | |
79 | virtio_transport_dgram_dequeue(struct vsock_sock *vsk, | |
80 | struct msghdr *msg, | |
81 | size_t len, int flags); | |
82 | ||
83 | s64 virtio_transport_stream_has_data(struct vsock_sock *vsk); | |
84 | s64 virtio_transport_stream_has_space(struct vsock_sock *vsk); | |
85 | ||
86 | int virtio_transport_do_socket_init(struct vsock_sock *vsk, | |
87 | struct vsock_sock *psk); | |
06a8fc78 AH |
88 | int |
89 | virtio_transport_notify_poll_in(struct vsock_sock *vsk, | |
90 | size_t target, | |
91 | bool *data_ready_now); | |
92 | int | |
93 | virtio_transport_notify_poll_out(struct vsock_sock *vsk, | |
94 | size_t target, | |
95 | bool *space_available_now); | |
96 | ||
97 | int virtio_transport_notify_recv_init(struct vsock_sock *vsk, | |
98 | size_t target, struct vsock_transport_recv_notify_data *data); | |
99 | int virtio_transport_notify_recv_pre_block(struct vsock_sock *vsk, | |
100 | size_t target, struct vsock_transport_recv_notify_data *data); | |
101 | int virtio_transport_notify_recv_pre_dequeue(struct vsock_sock *vsk, | |
102 | size_t target, struct vsock_transport_recv_notify_data *data); | |
103 | int virtio_transport_notify_recv_post_dequeue(struct vsock_sock *vsk, | |
104 | size_t target, ssize_t copied, bool data_read, | |
105 | struct vsock_transport_recv_notify_data *data); | |
106 | int virtio_transport_notify_send_init(struct vsock_sock *vsk, | |
107 | struct vsock_transport_send_notify_data *data); | |
108 | int virtio_transport_notify_send_pre_block(struct vsock_sock *vsk, | |
109 | struct vsock_transport_send_notify_data *data); | |
110 | int virtio_transport_notify_send_pre_enqueue(struct vsock_sock *vsk, | |
111 | struct vsock_transport_send_notify_data *data); | |
112 | int virtio_transport_notify_send_post_enqueue(struct vsock_sock *vsk, | |
113 | ssize_t written, struct vsock_transport_send_notify_data *data); | |
b9f2b0ff | 114 | void virtio_transport_notify_buffer_size(struct vsock_sock *vsk, u64 *val); |
06a8fc78 AH |
115 | |
116 | u64 virtio_transport_stream_rcvhiwat(struct vsock_sock *vsk); | |
117 | bool virtio_transport_stream_is_active(struct vsock_sock *vsk); | |
118 | bool virtio_transport_stream_allow(u32 cid, u32 port); | |
119 | int virtio_transport_dgram_bind(struct vsock_sock *vsk, | |
120 | struct sockaddr_vm *addr); | |
121 | bool virtio_transport_dgram_allow(u32 cid, u32 port); | |
122 | ||
123 | int virtio_transport_connect(struct vsock_sock *vsk); | |
124 | ||
125 | int virtio_transport_shutdown(struct vsock_sock *vsk, int mode); | |
126 | ||
127 | void virtio_transport_release(struct vsock_sock *vsk); | |
128 | ||
129 | ssize_t | |
130 | virtio_transport_stream_enqueue(struct vsock_sock *vsk, | |
131 | struct msghdr *msg, | |
132 | size_t len); | |
133 | int | |
134 | virtio_transport_dgram_enqueue(struct vsock_sock *vsk, | |
135 | struct sockaddr_vm *remote_addr, | |
136 | struct msghdr *msg, | |
137 | size_t len); | |
138 | ||
139 | void virtio_transport_destruct(struct vsock_sock *vsk); | |
140 | ||
4c7246dc SG |
141 | void virtio_transport_recv_pkt(struct virtio_transport *t, |
142 | struct virtio_vsock_pkt *pkt); | |
06a8fc78 AH |
143 | void virtio_transport_free_pkt(struct virtio_vsock_pkt *pkt); |
144 | void virtio_transport_inc_tx_pkt(struct virtio_vsock_sock *vvs, struct virtio_vsock_pkt *pkt); | |
145 | u32 virtio_transport_get_credit(struct virtio_vsock_sock *vvs, u32 wanted); | |
146 | void virtio_transport_put_credit(struct virtio_vsock_sock *vvs, u32 credit); | |
82dfb540 | 147 | void virtio_transport_deliver_tap_pkt(struct virtio_vsock_pkt *pkt); |
06a8fc78 AH |
148 | |
149 | #endif /* _LINUX_VIRTIO_VSOCK_H */ |