b9f2b0ffde
virtio_transport and vmci_transport handle the buffer_size sockopts in a very similar way. In order to support multiple transports, this patch moves this handling in the core to allow the user to change the options also if the socket is not yet assigned to any transport. This patch also adds the '.notify_buffer_size' callback in the 'struct virtio_transport' in order to inform the transport, when the buffer_size is changed by the user. It is also useful to limit the 'buffer_size' requested (e.g. virtio transports). Acked-by: Dexuan Cui <decui@microsoft.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Jorgen Hansen <jhansen@vmware.com> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
149 lines
4.5 KiB
C
149 lines
4.5 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_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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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 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 last_fwd_cnt;
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u32 rx_bytes;
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u32 buf_alloc;
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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 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 buf_len;
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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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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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void virtio_transport_notify_buffer_size(struct vsock_sock *vsk, u64 *val);
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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_transport *t,
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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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