#define CCM_MAID_LEN 48
#define CCM_OPCODE 1 /* CFM message opcode meaning CCM. */
#define CCM_RDI_MASK 0x80
-#define CFM_HEALTH_INTERVAL 6
struct ccm {
uint8_t mdlevel_version; /* MD Level and Version */
uint8_t opcode;
* avoid flapping. */
uint64_t *rmps_array; /* Cache of remote_mps. */
size_t rmps_array_len; /* Number of rmps in 'rmps_array'. */
-
- int health; /* Percentage of the number of CCM frames
- received. */
- int health_interval; /* Number of fault_intervals since health was
- recomputed. */
-
};
/* Remote MPs represent foreign network entities that are configured to have
receiving CCMs that it's expecting to. */
bool opup; /* Operational State. */
uint32_t seq; /* Most recently received sequence number. */
- uint8_t num_health_ccm; /* Number of received ccm frames every
- CFM_HEALTH_INTERVAL * 'fault_interval'. */
-
};
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(20, 30);
hmap_insert(&all_cfms, &cfm->hmap_node, hash_string(cfm->name, 0));
cfm->remote_opup = true;
cfm->fault_override = -1;
- cfm->health = -1;
return cfm;
}
sizeof *cfm->rmps_array);
cfm->remote_opup = true;
- if (cfm->health_interval == CFM_HEALTH_INTERVAL) {
- /* Calculate the cfm health of the interface. If the number of
- * remote_mpids of a cfm interface is > 1, the cfm health is
- * undefined. If the number of remote_mpids is 1, the cfm health is
- * the percentage of the ccm frames received in the
- * (CFM_HEALTH_INTERVAL * 3.5)ms, else it is 0. */
- if (hmap_count(&cfm->remote_mps) > 1) {
- cfm->health = -1;
- } else if (hmap_is_empty(&cfm->remote_mps)) {
- cfm->health = 0;
- } else {
- int exp_ccm_recvd;
-
- rmp = CONTAINER_OF(hmap_first(&cfm->remote_mps),
- struct remote_mp, node);
- exp_ccm_recvd = (CFM_HEALTH_INTERVAL * 7) / 2;
- /* Calculate the percentage of healthy ccm frames received.
- * Since the 'fault_interval' is (3.5 * cfm_interval), and
- * 1 CCM packet must be received every cfm_interval,
- * the 'remote_mpid' health reports the percentage of
- * healthy CCM frames received every
- * 'CFM_HEALTH_INTERVAL'th 'fault_interval'. */
- cfm->health = (rmp->num_health_ccm * 100) / exp_ccm_recvd;
- cfm->health = MIN(cfm->health, 100);
- rmp->num_health_ccm = 0;
- assert(cfm->health >= 0 && cfm->health <= 100);
- }
- cfm->health_interval = 0;
- }
- cfm->health_interval++;
-
HMAP_FOR_EACH_SAFE (rmp, rmp_next, node, &cfm->remote_mps) {
if (!rmp->recv) {
uint64_t ccm_mpid;
uint32_t ccm_seq;
bool ccm_opdown;
- bool fault = false;
if (cfm->extended) {
ccm_mpid = ntohll(ccm->mpid64);
VLOG_WARN_RL(&rl, "%s: received a CCM with an invalid interval"
" (%"PRIu8") from RMP %"PRIu64, cfm->name,
ccm_interval, ccm_mpid);
- fault = true;
}
if (cfm->extended && ccm_interval == 0
VLOG_WARN_RL(&rl, "%s: received a CCM with an invalid extended"
" interval (%"PRIu16"ms) from RMP %"PRIu64, cfm->name,
ccm_interval_ms_x, ccm_mpid);
- fault = true;
}
rmp = lookup_remote_mp(cfm, ccm_mpid);
"%s: dropped CCM with MPID %"PRIu64" from MAC "
ETH_ADDR_FMT, cfm->name, ccm_mpid,
ETH_ADDR_ARGS(eth->eth_src));
- fault = true;
}
}
" (interval %"PRIu8") (RDI %s)", cfm->name, ccm_seq,
ccm_mpid, ccm_interval, ccm_rdi ? "true" : "false");
- if (ccm_rdi) {
- fault = true;
- }
if (rmp) {
if (rmp->seq && ccm_seq != (rmp->seq + 1)) {
VLOG_WARN_RL(&rl, "%s: (mpid %"PRIu64") detected sequence"
" numbers which indicate possible connectivity"
" problems (previous %"PRIu32") (current %"PRIu32
")", cfm->name, ccm_mpid, rmp->seq, ccm_seq);
- fault = true;
}
rmp->mpid = ccm_mpid;
rmp->recv = true;
- if (!fault) {
- rmp->num_health_ccm++;
- }
rmp->seq = ccm_seq;
rmp->rdi = ccm_rdi;
rmp->opup = !ccm_opdown;
return cfm->fault;
}
-/* Gets the health of 'cfm'. Returns an integer between 0 and 100 indicating
- * the health of the link as a percentage of ccm frames received in
- * CFM_HEALTH_INTERVAL * 'fault_interval' if there is only 1 remote_mpid,
- * returns 0 if there are no remote_mpids, and returns -1 if there are more
- * than 1 remote_mpids. */
-int
-cfm_get_health(const struct cfm *cfm)
-{
- return cfm->health;
-}
-
/* Gets the operational state of 'cfm'. 'cfm' is considered operationally down
* if it has received a CCM with the operationally down bit set from any of its
* remote maintenance points. Returns true if 'cfm' is operationally up. False
ds_put_cstr(ds, "\n");
}
- if (cfm->health == -1) {
- ds_put_format(ds, "\taverage health: undefined\n");
- } else {
- ds_put_format(ds, "\taverage health: %d\n", cfm->health);
- }
ds_put_format(ds, "\topstate: %s\n", cfm->opup ? "up" : "down");
ds_put_format(ds, "\tremote_opstate: %s\n",
cfm->remote_opup ? "up" : "down");
an <code>ovs-appctl</code> command.
</column>
- <column name="cfm_health">
- <p>
- Indicates the health of the interface as a percentage of CCM frames
- received over 21 <ref column="other_config" key="cfm_interval"/>s.
- The health of an interface is undefined if it is communicating with
- more than one <ref column="cfm_remote_mpids"/>. It reduces if
- healthy heartbeats are not received at the expected rate, and
- gradually improves as healthy heartbeats are received at the desired
- rate. Every 21 <ref column="other_config" key="cfm_interval"/>s, the
- health of the interface is refreshed.
- </p>
- <p>
- As mentioned above, the faults can be triggered for several reasons.
- The link health will deteriorate even if heartbeats are received but
- they are reported to be unhealthy. An unhealthy heartbeat in this
- context is a heartbeat for which either some fault is set or is out
- of sequence. The interface health can be 100 only on receiving
- healthy heartbeats at the desired rate.
- </p>
- </column>
-
<column name="cfm_remote_mpids">
When CFM is properly configured, Open vSwitch will occasionally
receive CCM broadcasts. These broadcasts contain the MPID of the
projects / openvswitch / commitdiff