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; 51 void *buf; 52 u32 len; 53 u32 off; 54 bool reply; 55 }; 56 57 struct virtio_vsock_pkt_info { 58 u32 remote_cid, remote_port; 59 struct msghdr *msg; 60 u32 pkt_len; 61 u16 type; 62 u16 op; 63 u32 flags; 64 bool reply; 65 }; 66 67 struct virtio_transport { 68 /* This must be the first field */ 69 struct vsock_transport transport; 70 71 /* Takes ownership of the packet */ 72 int (*send_pkt)(struct virtio_vsock_pkt *pkt); 73 }; 74 75 ssize_t 76 virtio_transport_stream_dequeue(struct vsock_sock *vsk, 77 struct msghdr *msg, 78 size_t len, 79 int type); 80 int 81 virtio_transport_dgram_dequeue(struct vsock_sock *vsk, 82 struct msghdr *msg, 83 size_t len, int flags); 84 85 s64 virtio_transport_stream_has_data(struct vsock_sock *vsk); 86 s64 virtio_transport_stream_has_space(struct vsock_sock *vsk); 87 88 int virtio_transport_do_socket_init(struct vsock_sock *vsk, 89 struct vsock_sock *psk); 90 u64 virtio_transport_get_buffer_size(struct vsock_sock *vsk); 91 u64 virtio_transport_get_min_buffer_size(struct vsock_sock *vsk); 92 u64 virtio_transport_get_max_buffer_size(struct vsock_sock *vsk); 93 void virtio_transport_set_buffer_size(struct vsock_sock *vsk, u64 val); 94 void virtio_transport_set_min_buffer_size(struct vsock_sock *vsk, u64 val); 95 void virtio_transport_set_max_buffer_size(struct vsock_sock *vs, u64 val); 96 int 97 virtio_transport_notify_poll_in(struct vsock_sock *vsk, 98 size_t target, 99 bool *data_ready_now); 100 int 101 virtio_transport_notify_poll_out(struct vsock_sock *vsk, 102 size_t target, 103 bool *space_available_now); 104 105 int virtio_transport_notify_recv_init(struct vsock_sock *vsk, 106 size_t target, struct vsock_transport_recv_notify_data *data); 107 int virtio_transport_notify_recv_pre_block(struct vsock_sock *vsk, 108 size_t target, struct vsock_transport_recv_notify_data *data); 109 int virtio_transport_notify_recv_pre_dequeue(struct vsock_sock *vsk, 110 size_t target, struct vsock_transport_recv_notify_data *data); 111 int virtio_transport_notify_recv_post_dequeue(struct vsock_sock *vsk, 112 size_t target, ssize_t copied, bool data_read, 113 struct vsock_transport_recv_notify_data *data); 114 int virtio_transport_notify_send_init(struct vsock_sock *vsk, 115 struct vsock_transport_send_notify_data *data); 116 int virtio_transport_notify_send_pre_block(struct vsock_sock *vsk, 117 struct vsock_transport_send_notify_data *data); 118 int virtio_transport_notify_send_pre_enqueue(struct vsock_sock *vsk, 119 struct vsock_transport_send_notify_data *data); 120 int virtio_transport_notify_send_post_enqueue(struct vsock_sock *vsk, 121 ssize_t written, struct vsock_transport_send_notify_data *data); 122 123 u64 virtio_transport_stream_rcvhiwat(struct vsock_sock *vsk); 124 bool virtio_transport_stream_is_active(struct vsock_sock *vsk); 125 bool virtio_transport_stream_allow(u32 cid, u32 port); 126 int virtio_transport_dgram_bind(struct vsock_sock *vsk, 127 struct sockaddr_vm *addr); 128 bool virtio_transport_dgram_allow(u32 cid, u32 port); 129 130 int virtio_transport_connect(struct vsock_sock *vsk); 131 132 int virtio_transport_shutdown(struct vsock_sock *vsk, int mode); 133 134 void virtio_transport_release(struct vsock_sock *vsk); 135 136 ssize_t 137 virtio_transport_stream_enqueue(struct vsock_sock *vsk, 138 struct msghdr *msg, 139 size_t len); 140 int 141 virtio_transport_dgram_enqueue(struct vsock_sock *vsk, 142 struct sockaddr_vm *remote_addr, 143 struct msghdr *msg, 144 size_t len); 145 146 void virtio_transport_destruct(struct vsock_sock *vsk); 147 148 void virtio_transport_recv_pkt(struct virtio_vsock_pkt *pkt); 149 void virtio_transport_free_pkt(struct virtio_vsock_pkt *pkt); 150 void virtio_transport_inc_tx_pkt(struct virtio_vsock_sock *vvs, struct virtio_vsock_pkt *pkt); 151 u32 virtio_transport_get_credit(struct virtio_vsock_sock *vvs, u32 wanted); 152 void virtio_transport_put_credit(struct virtio_vsock_sock *vvs, u32 credit); 153 154 #endif /* _LINUX_VIRTIO_VSOCK_H */ 155