mirror of
https://github.com/openvswitch/ovs
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0de1b42596
The patch introduces experimental AF_XDP support for OVS netdev. AF_XDP, the Address Family of the eXpress Data Path, is a new Linux socket type built upon the eBPF and XDP technology. It is aims to have comparable performance to DPDK but cooperate better with existing kernel's networking stack. An AF_XDP socket receives and sends packets from an eBPF/XDP program attached to the netdev, by-passing a couple of Linux kernel's subsystems As a result, AF_XDP socket shows much better performance than AF_PACKET For more details about AF_XDP, please see linux kernel's Documentation/networking/af_xdp.rst. Note that by default, this feature is not compiled in. Signed-off-by: William Tu <u9012063@gmail.com> Signed-off-by: Ilya Maximets <i.maximets@samsung.com>
57 lines
1.6 KiB
C
57 lines
1.6 KiB
C
/*
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* Copyright (c) 2018, 2019 Nicira, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef XDPSOCK_H
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#define XDPSOCK_H 1
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#ifdef HAVE_AF_XDP
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#include <bpf/xsk.h>
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#include <errno.h>
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#include <stdbool.h>
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#include "openvswitch/thread.h"
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#include "ovs-atomic.h"
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/* LIFO ptr_array. */
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struct umem_pool {
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int index; /* Point to top. */
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unsigned int size;
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struct ovs_spin lock;
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void **array; /* A pointer array pointing to umem buf. */
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};
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/* Array-based dp_packet_afxdp. */
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struct xpacket_pool {
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unsigned int size;
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struct dp_packet_afxdp *array;
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};
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void umem_elem_push(struct umem_pool *umemp, void *addr);
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void umem_elem_push_n(struct umem_pool *umemp, int n, void **addrs);
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void *umem_elem_pop(struct umem_pool *umemp);
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int umem_elem_pop_n(struct umem_pool *umemp, int n, void **addrs);
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int umem_pool_init(struct umem_pool *umemp, unsigned int size);
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void umem_pool_cleanup(struct umem_pool *umemp);
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unsigned int umem_pool_count(struct umem_pool *umemp);
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int xpacket_pool_init(struct xpacket_pool *xp, unsigned int size);
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void xpacket_pool_cleanup(struct xpacket_pool *xp);
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#endif
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#endif
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