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/* Copyright (c) 2010, 2011, 2015 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef CFM_H
#define CFM_H 1
#include <stdint.h>
#include "hmap.h"
#include "openvswitch/types.h"
#include "packets.h"
struct flow;
struct dp_packet;
struct netdev;
struct flow_wildcards;
#define CFM_RANDOM_VLAN UINT16_MAX
#define CFM_FAULT_REASONS \
CFM_FAULT_REASON(RECV, recv) \
CFM_FAULT_REASON(RDI, rdi) \
CFM_FAULT_REASON(MAID, maid) \
CFM_FAULT_REASON(LOOPBACK, loopback) \
CFM_FAULT_REASON(OVERFLOW, overflow) \
CFM_FAULT_REASON(OVERRIDE, override)
enum cfm_fault_bit_index {
#define CFM_FAULT_REASON(NAME, STR) CFM_FAULT_INDEX_##NAME,
CFM_FAULT_REASONS
#undef CFM_FAULT_REASON
CFM_FAULT_N_REASONS
};
enum cfm_fault_reason {
#define CFM_FAULT_REASON(NAME, STR) \
CFM_FAULT_##NAME = 1 << CFM_FAULT_INDEX_##NAME,
CFM_FAULT_REASONS
#undef CFM_FAULT_REASON
};
struct cfm_settings {
uint64_t mpid; /* The MPID of this CFM. */
int interval; /* The requested transmission interval. */
bool extended; /* Run in extended mode. */
bool demand; /* Run in demand mode. */
bool opup; /* Operational State. */
uint16_t ccm_vlan; /* CCM Vlan tag. Zero if none.
CFM_RANDOM_VLAN if random. */
uint8_t ccm_pcp; /* CCM Priority. Zero if none. */
bool check_tnl_key; /* Verify inbound packet key? */
};
/* CFM status query. */
struct cfm_status {
/* 0 if not faulted, otherwise a combination of one or more reasons. */
enum cfm_fault_reason faults;
/* 0 if the remote CFM endpoint is operationally down,
* 1 if the remote CFM endpoint is operationally up,
* -1 if we don't know because the remote CFM endpoint is not in extended
* mode. */
int remote_opstate;
uint64_t flap_count;
/* Ordinarily a "health status" in the range 0...100 inclusive, with 0
* being worst and 100 being best, or -1 if the health status is not
* well-defined. */
int health;
/* MPIDs of remote maintenance points whose CCMs have been received. */
uint64_t *rmps;
size_t n_rmps;
};
void cfm_init(void);
struct cfm *cfm_create(const struct netdev *);
struct cfm *cfm_ref(const struct cfm *);
void cfm_unref(struct cfm *);
void cfm_run(struct cfm *);
bool cfm_should_send_ccm(struct cfm *);
void cfm_compose_ccm(struct cfm *, struct dp_packet *,
const uint8_t eth_src[ETH_ADDR_LEN]);
long long int cfm_wait(struct cfm *);
bool cfm_configure(struct cfm *, const struct cfm_settings *);
void cfm_set_netdev(struct cfm *, const struct netdev *);
bool cfm_should_process_flow(const struct cfm *cfm, const struct flow *,
struct flow_wildcards *);
void cfm_process_heartbeat(struct cfm *, const struct dp_packet *packet);
bool cfm_check_status_change(struct cfm *);
int cfm_get_fault(const struct cfm *);
uint64_t cfm_get_flap_count(const struct cfm *);
int cfm_get_health(const struct cfm *);
int cfm_get_opup(const struct cfm *);
void cfm_get_remote_mpids(const struct cfm *, uint64_t **rmps, size_t *n_rmps);
void cfm_get_status(const struct cfm *, struct cfm_status *);
const char *cfm_fault_reason_to_str(int fault);
long long int cfm_wake_time(struct cfm*);
#endif /* cfm.h */
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