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Merge pull request #6201 from adharkar/frr-master-fpm_mac

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zebra: Address sequencing issue while sending RMAC via FPM
This commit is contained in:
Russ White 2020-04-14 09:30:47 -04:00 committed by GitHub
commit 897cb75e8d
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 19 additions and 42 deletions
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61
zebra/zebra_fpm.c
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@ -1470,8 +1470,6 @@ static int zfpm_trigger_update(struct route_node *rn, const char *reason)
/*
* Generate Key for FPM MAC info hash entry
* Key is generated using MAC address and VNI id which should be sufficient
* to provide uniqueness
*/
static unsigned int zfpm_mac_info_hash_keymake(const void *p)
{
@ -1494,8 +1492,6 @@ static bool zfpm_mac_info_cmp(const void *p1, const void *p2)
if (memcmp(fpm_mac1->macaddr.octet, fpm_mac2->macaddr.octet, ETH_ALEN)
!= 0)
return false;
if (fpm_mac1->r_vtep_ip.s_addr != fpm_mac2->r_vtep_ip.s_addr)
return false;
if (fpm_mac1->vni != fpm_mac2->vni)
return false;
@ -1521,7 +1517,6 @@ static void *zfpm_mac_info_alloc(void *p)
fpm_mac = XCALLOC(MTYPE_FPM_MAC_INFO, sizeof(struct fpm_mac_info_t));
memcpy(&fpm_mac->macaddr, &key->macaddr, ETH_ALEN);
memcpy(&fpm_mac->r_vtep_ip, &key->r_vtep_ip, sizeof(struct in_addr));
fpm_mac->vni = key->vni;
return (void *)fpm_mac;
@ -1552,6 +1547,7 @@ static int zfpm_trigger_rmac_update(zebra_mac_t *rmac, zebra_l3vni_t *zl3vni,
char buf[ETHER_ADDR_STRLEN];
struct fpm_mac_info_t *fpm_mac, key;
struct interface *vxlan_if, *svi_if;
bool mac_found = false;
/*
* Ignore if the connection is down. We will update the FPM about
@ -1572,56 +1568,34 @@ static int zfpm_trigger_rmac_update(zebra_mac_t *rmac, zebra_l3vni_t *zl3vni,
memset(&key, 0, sizeof(struct fpm_mac_info_t));
memcpy(&key.macaddr, &rmac->macaddr, ETH_ALEN);
key.r_vtep_ip.s_addr = rmac->fwd_info.r_vtep_ip.s_addr;
key.vni = zl3vni->vni;
/* Check if this MAC is already present in the queue. */
fpm_mac = zfpm_mac_info_lookup(&key);
if (fpm_mac) {
if (!!CHECK_FLAG(fpm_mac->fpm_flags, ZEBRA_MAC_DELETE_FPM)
== delete) {
/*
* MAC is already present in the queue
* with the same op as this one. Do nothing
*/
zfpm_g->stats.redundant_triggers++;
return 0;
}
mac_found = true;
/*
* A new op for an already existing fpm_mac_info_t node.
* Update the existing node for the new op.
* If the enqueued op is "add" and current op is "delete",
* this is a noop. So, Unset ZEBRA_MAC_UPDATE_FPM flag.
* While processing FPM queue, we will silently delete this
* MAC entry without sending any update for this MAC.
*/
if (!delete) {
/*
* New op is "add". Previous op is "delete".
* Update the fpm_mac_info_t for the new add.
*/
fpm_mac->zebra_flags = rmac->flags;
fpm_mac->vxlan_if = vxlan_if ? vxlan_if->ifindex : 0;
fpm_mac->svi_if = svi_if ? svi_if->ifindex : 0;
UNSET_FLAG(fpm_mac->fpm_flags, ZEBRA_MAC_DELETE_FPM);
SET_FLAG(fpm_mac->fpm_flags, ZEBRA_MAC_UPDATE_FPM);
} else {
/*
* New op is "delete". Previous op is "add".
* Thus, no-op. Unset ZEBRA_MAC_UPDATE_FPM flag.
*/
if (!CHECK_FLAG(fpm_mac->fpm_flags, ZEBRA_MAC_DELETE_FPM) &&
delete == 1) {
SET_FLAG(fpm_mac->fpm_flags, ZEBRA_MAC_DELETE_FPM);
UNSET_FLAG(fpm_mac->fpm_flags, ZEBRA_MAC_UPDATE_FPM);
return 0;
}
return 0;
} else {
fpm_mac = hash_get(zfpm_g->fpm_mac_info_table, &key,
zfpm_mac_info_alloc);
if (!fpm_mac)
return 0;
}
fpm_mac = hash_get(zfpm_g->fpm_mac_info_table, &key,
zfpm_mac_info_alloc);
if (!fpm_mac)
return 0;
fpm_mac->r_vtep_ip.s_addr = rmac->fwd_info.r_vtep_ip.s_addr;
fpm_mac->zebra_flags = rmac->flags;
fpm_mac->vxlan_if = vxlan_if ? vxlan_if->ifindex : 0;
fpm_mac->svi_if = svi_if ? svi_if->ifindex : 0;
@ -1629,8 +1603,11 @@ static int zfpm_trigger_rmac_update(zebra_mac_t *rmac, zebra_l3vni_t *zl3vni,
SET_FLAG(fpm_mac->fpm_flags, ZEBRA_MAC_UPDATE_FPM);
if (delete)
SET_FLAG(fpm_mac->fpm_flags, ZEBRA_MAC_DELETE_FPM);
else
UNSET_FLAG(fpm_mac->fpm_flags, ZEBRA_MAC_DELETE_FPM);
TAILQ_INSERT_TAIL(&zfpm_g->mac_q, fpm_mac, fpm_mac_q_entries);
if (!mac_found)
TAILQ_INSERT_TAIL(&zfpm_g->mac_q, fpm_mac, fpm_mac_q_entries);
zfpm_g->stats.updates_triggered++;