VSOCK: Introduce virtio-vsock-common.ko
This module contains the common code and header files for the following virtio-vsock and virtio-vhost kernel modules. Signed-off-by: Asias He <asias@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Asias He
David S. Miller
Родитель
357ab2234d
Коммит
80a19e338d
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/*
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* This header, excluding the #ifdef __KERNEL__ part, is BSD licensed so
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* anyone can use the definitions to implement compatible drivers/servers:
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*
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of IBM nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* Copyright (C) Red Hat, Inc., 2013-2015
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* Copyright (C) Asias He <asias@redhat.com>, 2013
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* Copyright (C) Stefan Hajnoczi <stefanha@redhat.com>, 2015
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*/
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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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#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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#define VIRTIO_VSOCK_MAX_TX_BUF_SIZE (1024 * 1024 * 16)
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#define VIRTIO_VSOCK_MAX_DGRAM_SIZE (1024 * 64)
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struct vsock_transport_recv_notify_data;
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struct vsock_transport_send_notify_data;
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struct sockaddr_vm;
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struct vsock_sock;
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enum {
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VSOCK_VQ_CTRL = 0,
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VSOCK_VQ_RX = 1, /* for host to guest data */
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VSOCK_VQ_TX = 2, /* for guest to host data */
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VSOCK_VQ_MAX = 3,
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};
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/* virtio transport socket state */
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struct virtio_transport {
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struct virtio_transport_pkt_ops *ops;
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struct vsock_sock *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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struct mutex tx_lock;
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struct mutex rx_lock;
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struct list_head rx_queue;
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u32 rx_bytes;
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/* Protected by trans->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 trans->rx_lock */
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u32 fwd_cnt;
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/* Protected by sk_lock */
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u16 dgram_id;
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struct list_head incomplete_dgrams; /* dgram fragments */
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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 virtio_transport *trans;
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struct work_struct work;
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struct list_head list;
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void *buf;
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u32 len;
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u32 off;
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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 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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u16 dgram_id;
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u16 dgram_len;
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};
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struct virtio_transport_pkt_ops {
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int (*send_pkt)(struct vsock_sock *vsk,
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struct virtio_vsock_pkt_info *info);
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};
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void virtio_vsock_dumppkt(const char *func,
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const struct virtio_vsock_pkt *pkt);
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struct sock *
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virtio_transport_get_pending(struct sock *listener,
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struct virtio_vsock_pkt *pkt);
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struct virtio_vsock_pkt *
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virtio_transport_alloc_pkt(struct vsock_sock *vsk,
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struct virtio_vsock_pkt_info *info,
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size_t len,
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u32 src_cid,
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u32 src_port,
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u32 dst_cid,
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u32 dst_port);
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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_pkt *pkt);
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void virtio_transport_dec_tx_pkt(struct virtio_vsock_pkt *pkt);
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u32 virtio_transport_get_credit(struct virtio_transport *trans, u32 wanted);
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void virtio_transport_put_credit(struct virtio_transport *trans, u32 credit);
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#endif /* _LINUX_VIRTIO_VSOCK_H */
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@ -39,6 +39,7 @@
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#define VIRTIO_ID_9P 9 /* 9p virtio console */
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#define VIRTIO_ID_RPROC_SERIAL 11 /* virtio remoteproc serial link */
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#define VIRTIO_ID_CAIF 12 /* Virtio caif */
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#define VIRTIO_ID_VSOCK 13 /* virtio vsock transport */
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#define VIRTIO_ID_GPU 16 /* virtio GPU */
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#define VIRTIO_ID_INPUT 18 /* virtio input */
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@ -0,0 +1,89 @@
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/*
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* This header, excluding the #ifdef __KERNEL__ part, is BSD licensed so
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* anyone can use the definitions to implement compatible drivers/servers:
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*
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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||||
* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of IBM nor the names of its contributors
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* may be used to endorse or promote products derived from this software
|
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* without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
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* SUCH DAMAGE.
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||||
*
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* Copyright (C) Red Hat, Inc., 2013-2015
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* Copyright (C) Asias He <asias@redhat.com>, 2013
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* Copyright (C) Stefan Hajnoczi <stefanha@redhat.com>, 2015
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*/
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#ifndef _UAPI_LINUX_VIRTIO_VSOCK_H
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#define _UAPI_LINUX_VIRTIO_VOSCK_H
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#include <linux/types.h>
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#include <linux/virtio_ids.h>
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#include <linux/virtio_config.h>
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struct virtio_vsock_config {
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__le32 guest_cid;
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__le32 max_virtqueue_pairs;
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};
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struct virtio_vsock_hdr {
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__le32 src_cid;
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__le32 src_port;
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__le32 dst_cid;
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__le32 dst_port;
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__le32 len;
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__le16 type; /* enum virtio_vsock_type */
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__le16 op; /* enum virtio_vsock_op */
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__le32 flags;
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__le32 buf_alloc;
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__le32 fwd_cnt;
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};
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enum virtio_vsock_type {
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VIRTIO_VSOCK_TYPE_STREAM = 1,
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VIRTIO_VSOCK_TYPE_DGRAM = 2,
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};
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enum virtio_vsock_op {
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VIRTIO_VSOCK_OP_INVALID = 0,
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/* Connect operations */
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VIRTIO_VSOCK_OP_REQUEST = 1,
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VIRTIO_VSOCK_OP_RESPONSE = 2,
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VIRTIO_VSOCK_OP_ACK = 3,
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VIRTIO_VSOCK_OP_RST = 4,
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VIRTIO_VSOCK_OP_SHUTDOWN = 5,
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/* To send payload */
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VIRTIO_VSOCK_OP_RW = 6,
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/* Tell the peer our credit info */
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VIRTIO_VSOCK_OP_CREDIT_UPDATE = 7,
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/* Request the peer to send the credit info to us */
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VIRTIO_VSOCK_OP_CREDIT_REQUEST = 8,
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};
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/* VIRTIO_VSOCK_OP_SHUTDOWN flags values */
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enum virtio_vsock_shutdown {
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VIRTIO_VSOCK_SHUTDOWN_RCV = 1,
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VIRTIO_VSOCK_SHUTDOWN_SEND = 2,
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};
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#endif /* _UAPI_LINUX_VIRTIO_VSOCK_H */
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