160 lines
5.0 KiB
C
160 lines
5.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_VIRTIO_VSOCK_H
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#define _LINUX_VIRTIO_VSOCK_H
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#include <uapi/linux/virtio_vsock.h>
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#include <linux/socket.h>
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#include <net/sock.h>
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#include <net/af_vsock.h>
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#define VIRTIO_VSOCK_DEFAULT_MIN_BUF_SIZE 128
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#define VIRTIO_VSOCK_DEFAULT_BUF_SIZE (1024 * 256)
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#define VIRTIO_VSOCK_DEFAULT_MAX_BUF_SIZE (1024 * 256)
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#define VIRTIO_VSOCK_DEFAULT_RX_BUF_SIZE (1024 * 4)
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#define VIRTIO_VSOCK_MAX_BUF_SIZE 0xFFFFFFFFUL
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#define VIRTIO_VSOCK_MAX_PKT_BUF_SIZE (1024 * 64)
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enum {
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VSOCK_VQ_RX = 0, /* for host to guest data */
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VSOCK_VQ_TX = 1, /* for guest to host data */
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VSOCK_VQ_EVENT = 2,
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VSOCK_VQ_MAX = 3,
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};
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/* Per-socket state (accessed via vsk->trans) */
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struct virtio_vsock_sock {
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struct vsock_sock *vsk;
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/* Protected by lock_sock(sk_vsock(trans->vsk)) */
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u32 buf_size;
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u32 buf_size_min;
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u32 buf_size_max;
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spinlock_t tx_lock;
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spinlock_t rx_lock;
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/* Protected by tx_lock */
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u32 tx_cnt;
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u32 buf_alloc;
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u32 peer_fwd_cnt;
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u32 peer_buf_alloc;
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/* Protected by rx_lock */
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u32 fwd_cnt;
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u32 rx_bytes;
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struct list_head rx_queue;
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};
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struct virtio_vsock_pkt {
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struct virtio_vsock_hdr hdr;
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struct work_struct work;
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struct list_head list;
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/* socket refcnt not held, only use for cancellation */
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struct vsock_sock *vsk;
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void *buf;
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u32 len;
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u32 off;
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bool reply;
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};
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struct virtio_vsock_pkt_info {
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u32 remote_cid, remote_port;
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struct vsock_sock *vsk;
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struct msghdr *msg;
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u32 pkt_len;
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u16 type;
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u16 op;
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u32 flags;
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bool reply;
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};
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struct virtio_transport {
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/* This must be the first field */
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struct vsock_transport transport;
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/* Takes ownership of the packet */
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int (*send_pkt)(struct virtio_vsock_pkt *pkt);
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};
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ssize_t
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virtio_transport_stream_dequeue(struct vsock_sock *vsk,
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struct msghdr *msg,
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size_t len,
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int type);
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int
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virtio_transport_dgram_dequeue(struct vsock_sock *vsk,
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struct msghdr *msg,
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size_t len, int flags);
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s64 virtio_transport_stream_has_data(struct vsock_sock *vsk);
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s64 virtio_transport_stream_has_space(struct vsock_sock *vsk);
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int virtio_transport_do_socket_init(struct vsock_sock *vsk,
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struct vsock_sock *psk);
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u64 virtio_transport_get_buffer_size(struct vsock_sock *vsk);
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u64 virtio_transport_get_min_buffer_size(struct vsock_sock *vsk);
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u64 virtio_transport_get_max_buffer_size(struct vsock_sock *vsk);
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void virtio_transport_set_buffer_size(struct vsock_sock *vsk, u64 val);
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void virtio_transport_set_min_buffer_size(struct vsock_sock *vsk, u64 val);
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void virtio_transport_set_max_buffer_size(struct vsock_sock *vs, u64 val);
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int
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virtio_transport_notify_poll_in(struct vsock_sock *vsk,
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size_t target,
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bool *data_ready_now);
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int
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virtio_transport_notify_poll_out(struct vsock_sock *vsk,
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size_t target,
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bool *space_available_now);
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int virtio_transport_notify_recv_init(struct vsock_sock *vsk,
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size_t target, struct vsock_transport_recv_notify_data *data);
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int virtio_transport_notify_recv_pre_block(struct vsock_sock *vsk,
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size_t target, struct vsock_transport_recv_notify_data *data);
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int virtio_transport_notify_recv_pre_dequeue(struct vsock_sock *vsk,
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size_t target, struct vsock_transport_recv_notify_data *data);
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int virtio_transport_notify_recv_post_dequeue(struct vsock_sock *vsk,
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size_t target, ssize_t copied, bool data_read,
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struct vsock_transport_recv_notify_data *data);
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int virtio_transport_notify_send_init(struct vsock_sock *vsk,
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struct vsock_transport_send_notify_data *data);
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int virtio_transport_notify_send_pre_block(struct vsock_sock *vsk,
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struct vsock_transport_send_notify_data *data);
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int virtio_transport_notify_send_pre_enqueue(struct vsock_sock *vsk,
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struct vsock_transport_send_notify_data *data);
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int virtio_transport_notify_send_post_enqueue(struct vsock_sock *vsk,
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ssize_t written, struct vsock_transport_send_notify_data *data);
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u64 virtio_transport_stream_rcvhiwat(struct vsock_sock *vsk);
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bool virtio_transport_stream_is_active(struct vsock_sock *vsk);
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bool virtio_transport_stream_allow(u32 cid, u32 port);
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int virtio_transport_dgram_bind(struct vsock_sock *vsk,
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struct sockaddr_vm *addr);
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bool virtio_transport_dgram_allow(u32 cid, u32 port);
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int virtio_transport_connect(struct vsock_sock *vsk);
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int virtio_transport_shutdown(struct vsock_sock *vsk, int mode);
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void virtio_transport_release(struct vsock_sock *vsk);
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ssize_t
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virtio_transport_stream_enqueue(struct vsock_sock *vsk,
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struct msghdr *msg,
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size_t len);
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int
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virtio_transport_dgram_enqueue(struct vsock_sock *vsk,
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struct sockaddr_vm *remote_addr,
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struct msghdr *msg,
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size_t len);
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void virtio_transport_destruct(struct vsock_sock *vsk);
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void virtio_transport_recv_pkt(struct virtio_vsock_pkt *pkt);
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void virtio_transport_free_pkt(struct virtio_vsock_pkt *pkt);
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void virtio_transport_inc_tx_pkt(struct virtio_vsock_sock *vvs, struct virtio_vsock_pkt *pkt);
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u32 virtio_transport_get_credit(struct virtio_vsock_sock *vvs, u32 wanted);
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void virtio_transport_put_credit(struct virtio_vsock_sock *vvs, u32 credit);
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void virtio_transport_deliver_tap_pkt(struct virtio_vsock_pkt *pkt);
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#endif /* _LINUX_VIRTIO_VSOCK_H */
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