1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_VIRTIO_VSOCK_H
3 #define _LINUX_VIRTIO_VSOCK_H
5 #include <uapi/linux/virtio_vsock.h>
6 #include <linux/socket.h>
8 #include <net/af_vsock.h>
10 #define VIRTIO_VSOCK_SKB_HEADROOM (sizeof(struct virtio_vsock_hdr))
12 struct virtio_vsock_skb_cb {
17 #define VIRTIO_VSOCK_SKB_CB(skb) ((struct virtio_vsock_skb_cb *)((skb)->cb))
19 static inline struct virtio_vsock_hdr *virtio_vsock_hdr(struct sk_buff *skb)
21 return (struct virtio_vsock_hdr *)skb->head;
24 static inline bool virtio_vsock_skb_reply(struct sk_buff *skb)
26 return VIRTIO_VSOCK_SKB_CB(skb)->reply;
29 static inline void virtio_vsock_skb_set_reply(struct sk_buff *skb)
31 VIRTIO_VSOCK_SKB_CB(skb)->reply = true;
34 static inline bool virtio_vsock_skb_tap_delivered(struct sk_buff *skb)
36 return VIRTIO_VSOCK_SKB_CB(skb)->tap_delivered;
39 static inline void virtio_vsock_skb_set_tap_delivered(struct sk_buff *skb)
41 VIRTIO_VSOCK_SKB_CB(skb)->tap_delivered = true;
44 static inline void virtio_vsock_skb_clear_tap_delivered(struct sk_buff *skb)
46 VIRTIO_VSOCK_SKB_CB(skb)->tap_delivered = false;
49 static inline void virtio_vsock_skb_rx_put(struct sk_buff *skb)
53 len = le32_to_cpu(virtio_vsock_hdr(skb)->len);
59 static inline struct sk_buff *virtio_vsock_alloc_skb(unsigned int size, gfp_t mask)
63 if (size < VIRTIO_VSOCK_SKB_HEADROOM)
66 skb = alloc_skb(size, mask);
70 skb_reserve(skb, VIRTIO_VSOCK_SKB_HEADROOM);
75 virtio_vsock_skb_queue_head(struct sk_buff_head *list, struct sk_buff *skb)
77 spin_lock_bh(&list->lock);
78 __skb_queue_head(list, skb);
79 spin_unlock_bh(&list->lock);
83 virtio_vsock_skb_queue_tail(struct sk_buff_head *list, struct sk_buff *skb)
85 spin_lock_bh(&list->lock);
86 __skb_queue_tail(list, skb);
87 spin_unlock_bh(&list->lock);
90 static inline struct sk_buff *virtio_vsock_skb_dequeue(struct sk_buff_head *list)
94 spin_lock_bh(&list->lock);
95 skb = __skb_dequeue(list);
96 spin_unlock_bh(&list->lock);
101 static inline void virtio_vsock_skb_queue_purge(struct sk_buff_head *list)
103 spin_lock_bh(&list->lock);
104 __skb_queue_purge(list);
105 spin_unlock_bh(&list->lock);
108 static inline size_t virtio_vsock_skb_len(struct sk_buff *skb)
110 return (size_t)(skb_end_pointer(skb) - skb->head);
113 #define VIRTIO_VSOCK_DEFAULT_RX_BUF_SIZE (1024 * 4)
114 #define VIRTIO_VSOCK_MAX_BUF_SIZE 0xFFFFFFFFUL
115 #define VIRTIO_VSOCK_MAX_PKT_BUF_SIZE (1024 * 64)
118 VSOCK_VQ_RX = 0, /* for host to guest data */
119 VSOCK_VQ_TX = 1, /* for guest to host data */
124 /* Per-socket state (accessed via vsk->trans) */
125 struct virtio_vsock_sock {
126 struct vsock_sock *vsk;
131 /* Protected by tx_lock */
136 /* Protected by rx_lock */
141 struct sk_buff_head rx_queue;
145 struct virtio_vsock_pkt_info {
146 u32 remote_cid, remote_port;
147 struct vsock_sock *vsk;
156 struct virtio_transport {
157 /* This must be the first field */
158 struct vsock_transport transport;
160 /* Takes ownership of the packet */
161 int (*send_pkt)(struct sk_buff *skb);
165 virtio_transport_stream_dequeue(struct vsock_sock *vsk,
170 virtio_transport_dgram_dequeue(struct vsock_sock *vsk,
172 size_t len, int flags);
175 virtio_transport_seqpacket_enqueue(struct vsock_sock *vsk,
179 virtio_transport_seqpacket_dequeue(struct vsock_sock *vsk,
182 s64 virtio_transport_stream_has_data(struct vsock_sock *vsk);
183 s64 virtio_transport_stream_has_space(struct vsock_sock *vsk);
184 u32 virtio_transport_seqpacket_has_data(struct vsock_sock *vsk);
186 int virtio_transport_do_socket_init(struct vsock_sock *vsk,
187 struct vsock_sock *psk);
189 virtio_transport_notify_poll_in(struct vsock_sock *vsk,
191 bool *data_ready_now);
193 virtio_transport_notify_poll_out(struct vsock_sock *vsk,
195 bool *space_available_now);
197 int virtio_transport_notify_recv_init(struct vsock_sock *vsk,
198 size_t target, struct vsock_transport_recv_notify_data *data);
199 int virtio_transport_notify_recv_pre_block(struct vsock_sock *vsk,
200 size_t target, struct vsock_transport_recv_notify_data *data);
201 int virtio_transport_notify_recv_pre_dequeue(struct vsock_sock *vsk,
202 size_t target, struct vsock_transport_recv_notify_data *data);
203 int virtio_transport_notify_recv_post_dequeue(struct vsock_sock *vsk,
204 size_t target, ssize_t copied, bool data_read,
205 struct vsock_transport_recv_notify_data *data);
206 int virtio_transport_notify_send_init(struct vsock_sock *vsk,
207 struct vsock_transport_send_notify_data *data);
208 int virtio_transport_notify_send_pre_block(struct vsock_sock *vsk,
209 struct vsock_transport_send_notify_data *data);
210 int virtio_transport_notify_send_pre_enqueue(struct vsock_sock *vsk,
211 struct vsock_transport_send_notify_data *data);
212 int virtio_transport_notify_send_post_enqueue(struct vsock_sock *vsk,
213 ssize_t written, struct vsock_transport_send_notify_data *data);
214 void virtio_transport_notify_buffer_size(struct vsock_sock *vsk, u64 *val);
216 u64 virtio_transport_stream_rcvhiwat(struct vsock_sock *vsk);
217 bool virtio_transport_stream_is_active(struct vsock_sock *vsk);
218 bool virtio_transport_stream_allow(u32 cid, u32 port);
219 int virtio_transport_dgram_bind(struct vsock_sock *vsk,
220 struct sockaddr_vm *addr);
221 bool virtio_transport_dgram_allow(u32 cid, u32 port);
223 int virtio_transport_connect(struct vsock_sock *vsk);
225 int virtio_transport_shutdown(struct vsock_sock *vsk, int mode);
227 void virtio_transport_release(struct vsock_sock *vsk);
230 virtio_transport_stream_enqueue(struct vsock_sock *vsk,
234 virtio_transport_dgram_enqueue(struct vsock_sock *vsk,
235 struct sockaddr_vm *remote_addr,
239 void virtio_transport_destruct(struct vsock_sock *vsk);
241 void virtio_transport_recv_pkt(struct virtio_transport *t,
242 struct sk_buff *skb);
243 void virtio_transport_inc_tx_pkt(struct virtio_vsock_sock *vvs, struct sk_buff *skb);
244 u32 virtio_transport_get_credit(struct virtio_vsock_sock *vvs, u32 wanted);
245 void virtio_transport_put_credit(struct virtio_vsock_sock *vvs, u32 credit);
246 void virtio_transport_deliver_tap_pkt(struct sk_buff *skb);
247 int virtio_transport_purge_skbs(void *vsk, struct sk_buff_head *list);
248 #endif /* _LINUX_VIRTIO_VSOCK_H */