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 /* 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 59 struct 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 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); 156 void virtio_transport_deliver_tap_pkt(struct virtio_vsock_pkt *pkt); 157 158 #endif /* _LINUX_VIRTIO_VSOCK_H */ 159