/* A 'ccm' represents a Continuity Check Message from the 802.1ag
* specification. Continuity Check Messages are broadcast periodically so that
- * hosts can determine whom they have connectivity to. */
-#define CCM_LEN 74
+ * hosts can determine whom they have connectivity to.
+ *
+ * The minimum length of a CCM as specified by IEEE 802.1ag is 75 bytes.
+ * Previous versions of Open vSwitch generated 74-byte CCM messages, so we
+ * accept such messages too. */
+#define CCM_LEN 75
+#define CCM_ACCEPT_LEN 74
#define CCM_MAID_LEN 48
#define CCM_OPCODE 1 /* CFM message opcode meaning CCM. */
#define CCM_RDI_MASK 0x80
/* Defined by ITU-T Y.1731 should be zero */
ovs_be16 interval_ms_x; /* Transmission interval in ms. */
ovs_be64 mpid64; /* MPID in extended mode. */
- uint8_t zero[6];
+ uint8_t opdown; /* Operationally down. */
+ uint8_t zero[5];
+
+ /* TLV space. */
+ uint8_t end_tlv;
} __attribute__((packed));
BUILD_ASSERT_DECL(CCM_LEN == sizeof(struct ccm));
bool extended; /* Extended mode. */
bool fault; /* Indicates connectivity fault. */
bool unexpected_recv; /* Received an unexpected CCM. */
+ bool opup; /* Operational State. */
+ bool remote_opup; /* Remote Operational State. */
uint32_t seq; /* The sequence number of our last CCM. */
uint8_t ccm_interval; /* The CCM transmission interval. */
bool recv; /* CCM was received since last fault check. */
bool rdi; /* Remote Defect Indicator. Indicates remote_mp isn't
receiving CCMs that it's expecting to. */
+ bool opup; /* Operational State. */
};
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
hmap_init(&cfm->remote_mps);
cfm_generate_maid(cfm);
hmap_insert(&all_cfms, &cfm->hmap_node, hash_string(cfm->name, 0));
+ cfm->remote_opup = true;
return cfm;
}
cfm->rmps_array = xmalloc(hmap_count(&cfm->remote_mps) *
sizeof *cfm->rmps_array);
+ cfm->remote_opup = true;
HMAP_FOR_EACH_SAFE (rmp, rmp_next, node, &cfm->remote_mps) {
if (!rmp->recv) {
cfm->fault = true;
}
+ if (!rmp->opup) {
+ cfm->remote_opup = rmp->opup;
+ }
+
cfm->rmps_array[cfm->rmps_array_len++] = rmp->mpid;
}
}
ccm->flags = cfm->ccm_interval;
memcpy(ccm->maid, cfm->maid, sizeof ccm->maid);
memset(ccm->zero, 0, sizeof ccm->zero);
+ ccm->end_tlv = 0;
if (cfm->extended) {
ccm->mpid = htons(hash_mpid(cfm->mpid));
ccm->mpid64 = htonll(cfm->mpid);
+ ccm->opdown = !cfm->opup;
} else {
ccm->mpid = htons(cfm->mpid);
ccm->mpid64 = htonll(0);
+ ccm->opdown = 0;
}
if (cfm->ccm_interval == 0) {
cfm->mpid = s->mpid;
cfm->extended = s->extended;
+ cfm->opup = s->opup;
interval = ms_to_ccm_interval(s->interval);
interval_ms = ccm_interval_to_ms(interval);
struct eth_header *eth;
eth = p->l2;
- ccm = ofpbuf_at(p, (uint8_t *)p->l3 - (uint8_t *)p->data, CCM_LEN);
+ ccm = ofpbuf_at(p, (uint8_t *)p->l3 - (uint8_t *)p->data, CCM_ACCEPT_LEN);
if (!ccm) {
VLOG_INFO_RL(&rl, "%s: Received an unparseable 802.1ag CCM heartbeat.",
struct remote_mp *rmp;
uint64_t ccm_mpid;
+ bool ccm_opdown;
- ccm_mpid = cfm->extended ? ntohll(ccm->mpid64) : ntohs(ccm->mpid);
+ if (cfm->extended) {
+ ccm_mpid = ntohll(ccm->mpid64);
+ ccm_opdown = ccm->opdown;
+ } else {
+ ccm_mpid = ntohs(ccm->mpid);
+ ccm_opdown = false;
+ }
if (ccm_interval != cfm->ccm_interval) {
VLOG_WARN_RL(&rl, "%s: received a CCM with an invalid interval"
}
rmp = lookup_remote_mp(cfm, ccm_mpid);
+ if (!rmp) {
+ if (hmap_count(&cfm->remote_mps) < CFM_MAX_RMPS) {
+ rmp = xmalloc(sizeof *rmp);
+ hmap_insert(&cfm->remote_mps, &rmp->node, hash_mpid(ccm_mpid));
+ } else {
+ cfm->unexpected_recv = true;
+ VLOG_WARN_RL(&rl,
+ "%s: dropped CCM with MPID %"PRIu64" from MAC "
+ ETH_ADDR_FMT, cfm->name, ccm_mpid,
+ ETH_ADDR_ARGS(eth->eth_src));
+ }
+ }
+
if (rmp) {
- rmp->recv = true;
- rmp->rdi = ccm_rdi;
- } else if (hmap_count(&cfm->remote_mps) < CFM_MAX_RMPS) {
- rmp = xmalloc(sizeof *rmp);
rmp->mpid = ccm_mpid;
rmp->recv = true;
rmp->rdi = ccm_rdi;
- hmap_insert(&cfm->remote_mps, &rmp->node, hash_mpid(rmp->mpid));
- } else {
- cfm->unexpected_recv = true;
- VLOG_WARN_RL(&rl, "%s: dropped CCM with MPID %"PRIu64" from MAC "
- ETH_ADDR_FMT, cfm->name, ccm_mpid,
- ETH_ADDR_ARGS(eth->eth_src));
+ rmp->opup = !ccm_opdown;
}
VLOG_DBG("%s: received CCM (seq %"PRIu32") (mpid %"PRIu64")"
return cfm->fault;
}
+/* 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
+ * otherwise. */
+bool
+cfm_get_opup(const struct cfm *cfm)
+{
+ return cfm->remote_opup;
+}
+
/* Populates 'rmps' with an array of remote maintenance points reachable by
* 'cfm'. The number of remote maintenance points is written to 'n_rmps'.
* 'cfm' retains ownership of the array written to 'rmps' */
struct remote_mp *rmp;
ds_put_format(ds, "---- %s ----\n", cfm->name);
- ds_put_format(ds, "MPID %"PRIu64":%s%s\n", cfm->mpid,
+ ds_put_format(ds, "MPID %"PRIu64":%s%s%s\n", cfm->mpid,
+ cfm->extended ? " extended" : "",
cfm->fault ? " fault" : "",
cfm->unexpected_recv ? " unexpected_recv" : "");
+ ds_put_format(ds, "\topstate: %s\n", cfm->opup ? "up" : "down");
+ ds_put_format(ds, "\tremote_opstate: %s\n",
+ cfm->remote_opup ? "up" : "down");
ds_put_format(ds, "\tinterval: %dms\n", cfm->ccm_interval_ms);
ds_put_format(ds, "\tnext CCM tx: %lldms\n",
timer_msecs_until_expired(&cfm->tx_timer));
rmp->rdi ? " rdi" : "");
ds_put_format(ds, "\trecv since check: %s\n",
rmp->recv ? "true" : "false");
+ ds_put_format(ds, "\topstate: %s\n", rmp->opup? "up" : "down");
}
}
git://git.onelab.eu / sliver-openvswitch.git / blobdiff