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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 | ||
16 | enum { | |
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) */ | |
24 | struct 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 | ||
47 | struct virtio_vsock_pkt { | |
48 | struct virtio_vsock_hdr hdr; | |
49 | struct work_struct work; | |
50 | struct list_head list; | |
36d277ba PT |
51 | /* socket refcnt not held, only use for cancellation */ |
52 | struct vsock_sock *vsk; | |
06a8fc78 AH |
53 | void *buf; |
54 | u32 len; | |
55 | u32 off; | |
56 | bool reply; | |
57 | }; | |
58 | ||
59 | struct virtio_vsock_pkt_info { | |
60 | u32 remote_cid, remote_port; | |
36d277ba | 61 | struct vsock_sock *vsk; |
06a8fc78 AH |
62 | struct msghdr *msg; |
63 | u32 pkt_len; | |
64 | u16 type; | |
65 | u16 op; | |
66 | u32 flags; | |
67 | bool reply; | |
68 | }; | |
69 | ||
70 | struct 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 | ||
78 | ssize_t | |
79 | virtio_transport_stream_dequeue(struct vsock_sock *vsk, | |
80 | struct msghdr *msg, | |
81 | size_t len, | |
82 | int type); | |
83 | int | |
84 | virtio_transport_dgram_dequeue(struct vsock_sock *vsk, | |
85 | struct msghdr *msg, | |
86 | size_t len, int flags); | |
87 | ||
88 | s64 virtio_transport_stream_has_data(struct vsock_sock *vsk); | |
89 | s64 virtio_transport_stream_has_space(struct vsock_sock *vsk); | |
90 | ||
91 | int virtio_transport_do_socket_init(struct vsock_sock *vsk, | |
92 | struct vsock_sock *psk); | |
93 | u64 virtio_transport_get_buffer_size(struct vsock_sock *vsk); | |
94 | u64 virtio_transport_get_min_buffer_size(struct vsock_sock *vsk); | |
95 | u64 virtio_transport_get_max_buffer_size(struct vsock_sock *vsk); | |
96 | void virtio_transport_set_buffer_size(struct vsock_sock *vsk, u64 val); | |
97 | void virtio_transport_set_min_buffer_size(struct vsock_sock *vsk, u64 val); | |
98 | void virtio_transport_set_max_buffer_size(struct vsock_sock *vs, u64 val); | |
99 | int | |
100 | virtio_transport_notify_poll_in(struct vsock_sock *vsk, | |
101 | size_t target, | |
102 | bool *data_ready_now); | |
103 | int | |
104 | virtio_transport_notify_poll_out(struct vsock_sock *vsk, | |
105 | size_t target, | |
106 | bool *space_available_now); | |
107 | ||
108 | int virtio_transport_notify_recv_init(struct vsock_sock *vsk, | |
109 | size_t target, struct vsock_transport_recv_notify_data *data); | |
110 | int virtio_transport_notify_recv_pre_block(struct vsock_sock *vsk, | |
111 | size_t target, struct vsock_transport_recv_notify_data *data); | |
112 | int virtio_transport_notify_recv_pre_dequeue(struct vsock_sock *vsk, | |
113 | size_t target, struct vsock_transport_recv_notify_data *data); | |
114 | int 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); | |
117 | int virtio_transport_notify_send_init(struct vsock_sock *vsk, | |
118 | struct vsock_transport_send_notify_data *data); | |
119 | int virtio_transport_notify_send_pre_block(struct vsock_sock *vsk, | |
120 | struct vsock_transport_send_notify_data *data); | |
121 | int virtio_transport_notify_send_pre_enqueue(struct vsock_sock *vsk, | |
122 | struct vsock_transport_send_notify_data *data); | |
123 | int virtio_transport_notify_send_post_enqueue(struct vsock_sock *vsk, | |
124 | ssize_t written, struct vsock_transport_send_notify_data *data); | |
125 | ||
126 | u64 virtio_transport_stream_rcvhiwat(struct vsock_sock *vsk); | |
127 | bool virtio_transport_stream_is_active(struct vsock_sock *vsk); | |
128 | bool virtio_transport_stream_allow(u32 cid, u32 port); | |
129 | int virtio_transport_dgram_bind(struct vsock_sock *vsk, | |
130 | struct sockaddr_vm *addr); | |
131 | bool virtio_transport_dgram_allow(u32 cid, u32 port); | |
132 | ||
133 | int virtio_transport_connect(struct vsock_sock *vsk); | |
134 | ||
135 | int virtio_transport_shutdown(struct vsock_sock *vsk, int mode); | |
136 | ||
137 | void virtio_transport_release(struct vsock_sock *vsk); | |
138 | ||
139 | ssize_t | |
140 | virtio_transport_stream_enqueue(struct vsock_sock *vsk, | |
141 | struct msghdr *msg, | |
142 | size_t len); | |
143 | int | |
144 | virtio_transport_dgram_enqueue(struct vsock_sock *vsk, | |
145 | struct sockaddr_vm *remote_addr, | |
146 | struct msghdr *msg, | |
147 | size_t len); | |
148 | ||
149 | void virtio_transport_destruct(struct vsock_sock *vsk); | |
150 | ||
151 | void virtio_transport_recv_pkt(struct virtio_vsock_pkt *pkt); | |
152 | void virtio_transport_free_pkt(struct virtio_vsock_pkt *pkt); | |
153 | void virtio_transport_inc_tx_pkt(struct virtio_vsock_sock *vvs, struct virtio_vsock_pkt *pkt); | |
154 | u32 virtio_transport_get_credit(struct virtio_vsock_sock *vvs, u32 wanted); | |
155 | void virtio_transport_put_credit(struct virtio_vsock_sock *vvs, u32 credit); | |
82dfb540 | 156 | void virtio_transport_deliver_tap_pkt(struct virtio_vsock_pkt *pkt); |
06a8fc78 AH |
157 | |
158 | #endif /* _LINUX_VIRTIO_VSOCK_H */ |