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https://github.com/openvswitch/ovs
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3b1882261c
Currently a bridge mirror will collect all packets and tools like ovs-tcpdump can apply additional filters after they have already been duplicated by vswitchd. This can result in inefficient collection. This patch adds support to apply pre-selection to bridge mirrors, which can limit which packets are mirrored based on flow metadata. This significantly improves overall vswitchd performance during mirroring if only a subset of traffic is required. Signed-off-by: Mike Pattrick <mkp@redhat.com> Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
91 lines
3.0 KiB
C
91 lines
3.0 KiB
C
/* Copyright (c) 2013, 2015 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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#ifndef OFPROTO_DPIF_MIRROR_H
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#define OFPROTO_DPIF_MIRROR_H 1
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#include <stdint.h>
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#include "util.h"
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#define MAX_MIRRORS 32
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typedef uint32_t mirror_mask_t;
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struct ofproto_mirror_settings;
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struct ofbundle;
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struct ofproto;
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struct mirror_bundles {
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struct ofbundle **srcs;
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size_t n_srcs;
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struct ofbundle **dsts;
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size_t n_dsts;
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struct ofbundle *out_bundle;
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};
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struct mirror_config {
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/* A bitmap of mirrors that duplicate the current mirror. */
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mirror_mask_t dup_mirrors;
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/* VLANs of packets to select for mirroring. */
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unsigned long *vlans; /* vlan_bitmap, NULL selects all VLANs. */
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/* Miniflow and minimask if a filter is configured, else both are NULL. */
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struct miniflow *filter_flow;
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struct minimask *filter_mask;
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/* Output (mutually exclusive). */
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struct ofbundle *out_bundle; /* A registered ofbundle handle or NULL. */
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uint16_t out_vlan; /* Output VLAN, not used if out_bundle is
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set. */
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/* Max size of a mirrored packet in bytes, if set to zero then no
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* truncation will occur. */
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uint16_t snaplen;
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};
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/* The following functions are used by handler threads without any locking,
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* assuming RCU protection. */
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struct mbridge *mbridge_ref(const struct mbridge *);
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void mbridge_unref(struct mbridge *);
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bool mbridge_has_mirrors(struct mbridge *);
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mirror_mask_t mirror_bundle_out(struct mbridge *, struct ofbundle *);
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mirror_mask_t mirror_bundle_src(struct mbridge *, struct ofbundle *);
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mirror_mask_t mirror_bundle_dst(struct mbridge *, struct ofbundle *);
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void mirror_update_stats(struct mbridge*, mirror_mask_t, uint64_t packets,
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uint64_t bytes);
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bool mirror_get(struct mbridge *, int index, struct mirror_config *);
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/* The remaining functions are assumed to be called by the main thread only. */
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struct mbridge *mbridge_create(void);
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bool mbridge_need_revalidate(struct mbridge *);
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void mbridge_register_bundle(struct mbridge *, struct ofbundle *);
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void mbridge_unregister_bundle(struct mbridge *, struct ofbundle *);
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int mirror_set(struct mbridge *, const struct ofproto *, void *aux,
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const struct ofproto_mirror_settings *,
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const struct mirror_bundles *);
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void mirror_destroy(struct mbridge *, void *aux);
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int mirror_get_stats(struct mbridge *, void *aux, uint64_t *packets,
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uint64_t *bytes);
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#endif /* ofproto-dpif-mirror.h */
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