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fd0ca62bb1
Commit 2b540ecb (Added handling of previously ignored cfm faults.)
made the CFM code trigger a fault when a packet is received with an
out of order sequence number. This means that if even one CFM
probe is dropped, a fault will be triggered because the next
received probe's sequence would be two greater than the last. This
is in conflict with the 802.1ag requirement that 3.5 dropped probes
triggers fault.
Signed-off-by: Ethan Jackson <ethan@nicira.com>
80 lines
2.6 KiB
C
80 lines
2.6 KiB
C
/* Copyright (c) 2010, 2011 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 CFM_H
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#define CFM_H 1
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#include <stdint.h>
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#include "hmap.h"
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#include "openvswitch/types.h"
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struct flow;
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struct ofpbuf;
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#define CFM_RANDOM_VLAN UINT16_MAX
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#define CFM_FAULT_REASONS \
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CFM_FAULT_REASON(RECV, recv) \
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CFM_FAULT_REASON(RDI, rdi) \
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CFM_FAULT_REASON(MAID, maid) \
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CFM_FAULT_REASON(LOOPBACK, loopback) \
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CFM_FAULT_REASON(OVERFLOW, overflow) \
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CFM_FAULT_REASON(OVERRIDE, override) \
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CFM_FAULT_REASON(INTERVAL, interval)
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enum cfm_fault_bit_index {
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#define CFM_FAULT_REASON(NAME, STR) CFM_FAULT_INDEX_##NAME,
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CFM_FAULT_REASONS
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#undef CFM_FAULT_REASON
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CFM_FAULT_N_REASONS
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};
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enum cfm_fault_reason {
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#define CFM_FAULT_REASON(NAME, STR) \
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CFM_FAULT_##NAME = 1 << CFM_FAULT_INDEX_##NAME,
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CFM_FAULT_REASONS
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#undef CFM_FAULT_REASON
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};
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struct cfm_settings {
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uint64_t mpid; /* The MPID of this CFM. */
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int interval; /* The requested transmission interval. */
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bool extended; /* Run in extended mode. */
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bool opup; /* Operational State. */
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uint16_t ccm_vlan; /* CCM Vlan tag. Zero if none.
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CFM_RANDOM_VLAN if random. */
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uint8_t ccm_pcp; /* CCM Priority. Zero if none. */
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};
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void cfm_init(void);
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struct cfm *cfm_create(const char *name);
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void cfm_destroy(struct cfm *);
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void cfm_run(struct cfm *);
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bool cfm_should_send_ccm(struct cfm *);
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void cfm_compose_ccm(struct cfm *, struct ofpbuf *packet, uint8_t eth_src[6]);
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void cfm_wait(struct cfm *);
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bool cfm_configure(struct cfm *, const struct cfm_settings *);
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bool cfm_should_process_flow(const struct cfm *cfm, const struct flow *);
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void cfm_process_heartbeat(struct cfm *, const struct ofpbuf *packet);
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int cfm_get_fault(const struct cfm *);
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int cfm_get_health(const struct cfm *);
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bool cfm_get_opup(const struct cfm *);
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void cfm_get_remote_mpids(const struct cfm *, const uint64_t **rmps,
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size_t *n_rmps);
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const char *cfm_fault_reason_to_str(int fault);
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#endif /* cfm.h */
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