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zebra: Fix for mcast-group update and delete per vni for svd

Browse source 
Ticket: 2698649
Testing Done: precommit and evpn-min

Problem:
When the mcast-group is updated, the changes were being read from the netlink
and populated by zebra, but when kernel sends the delete of fdb delete for the
group, we are deleting the mcast-group that we newly updated. This is because,
currently we blindly reset the mcast-group during fdb delete without checking
for mcast-group associated to the vni.

Fix is to separate add/update and delete mcast-group functions and to check
for mcast-group before resetting during delete.

Signed-off-by: sramamurthy <sramamurthy@nvidia.com>
This commit is contained in:
sharathr 2021-10-19 04:01:50 -07:00 committed by Stephen Worley
parent 00d30205ef
commit e41db24056
3 changed files with 41 additions and 12 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
zebra/rt_netlink.c
View file

@ -3715,7 +3715,7 @@ static int netlink_macfdb_change(struct nlmsghdr *h, int len, ns_id_t ns_id)
return 0;
if (vni_mcast_grp)
return zebra_vxlan_if_vni_mcast_group_update(
return zebra_vxlan_if_vni_mcast_group_add_update(
ifp, vni, &vtep_ip);
return zebra_vxlan_dp_network_mac_add(
@ -3742,8 +3742,8 @@ static int netlink_macfdb_change(struct nlmsghdr *h, int len, ns_id_t ns_id)
if (dst_present) {
if (vni_mcast_grp)
return zebra_vxlan_if_vni_mcast_group_update(ifp, vni,
NULL);
return zebra_vxlan_if_vni_mcast_group_del(ifp, vni,
&vtep_ip);
if (is_zero_mac(&mac) && vni)
return zebra_vxlan_check_readd_vtep(ifp, vni, vtep_ip);

38
zebra/zebra_vxlan_if.c
View file

@ -806,8 +806,9 @@ int zebra_vxlan_if_vni_table_add_update(struct interface *ifp,
return 0;
}
int zebra_vxlan_if_vni_mcast_group_update(struct interface *ifp, vni_t vni_id,
struct in_addr *mcast_group)
int zebra_vxlan_if_vni_mcast_group_add_update(struct interface *ifp,
vni_t vni_id,
struct in_addr *mcast_group)
{
struct zebra_if *zif;
struct zebra_vxlan_vni *vni;
@ -826,10 +827,35 @@ int zebra_vxlan_if_vni_mcast_group_update(struct interface *ifp, vni_t vni_id,
ctx.old_vni.mcast_grp = vni->mcast_grp;
ctx.chgflags = ZEBRA_VXLIF_MCAST_GRP_CHANGE;
if (mcast_group)
vni->mcast_grp = *mcast_group;
else
memset(&vni->mcast_grp, 0, sizeof(vni->mcast_grp));
vni->mcast_grp = *mcast_group;
return zebra_vxlan_if_update_vni(ifp, vni, &ctx);
}
int zebra_vxlan_if_vni_mcast_group_del(struct interface *ifp, vni_t vni_id,
struct in_addr *mcast_group)
{
struct zebra_if *zif = NULL;
struct zebra_vxlan_vni *vni;
struct zebra_vxlan_if_update_ctx ctx;
zif = (struct zebra_if *)ifp->info;
if (!IS_ZEBRA_VXLAN_IF_SVD(zif))
return 0;
vni = zebra_vxlan_if_vni_find(zif, vni_id);
if (!vni)
return 0;
if (memcmp(mcast_group, &vni->mcast_grp, sizeof(*mcast_group)))
return 0;
memset(&ctx, 0, sizeof(ctx));
ctx.old_vni.mcast_grp = vni->mcast_grp;
ctx.chgflags = ZEBRA_VXLIF_MCAST_GRP_CHANGE;
memset(&vni->mcast_grp, 0, sizeof(vni->mcast_grp));
return zebra_vxlan_if_update_vni(ifp, vni, &ctx);
}

9
zebra/zebra_vxlan_if.h
View file

@ -64,9 +64,12 @@ extern void zebra_vxlan_if_vni_walk(struct zebra_if *zif,
void *arg);
extern vni_t zebra_vxlan_if_access_vlan_vni_find(struct zebra_if *zif,
struct interface *br_if);
extern int zebra_vxlan_if_vni_mcast_group_update(struct interface *ifp,
vni_t vni_id,
struct in_addr *mcast_group);
extern int
zebra_vxlan_if_vni_mcast_group_add_update(struct interface *ifp, vni_t vni_id,
struct in_addr *mcast_group);
extern int zebra_vxlan_if_vni_mcast_group_del(struct interface *ifp,
vni_t vni_id,
struct in_addr *mcast_group);
extern int zebra_vxlan_if_vni_down(struct interface *ifp,
struct zebra_vxlan_vni *vni);
extern int zebra_vxlan_if_down(struct interface *ifp);