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Quagga: Implement VRF change semantics for an interface

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Handle VRF change for an interface in BGP (the only VRF client
right now).

Signed-off-by: Vivek Venkatraman <vivek@cumulusnetworks.com>
Reviewed-by:   Donald Sharp <sharpd@cumulusnetworks.com>
Reviewed-by:   Don Slice <dslice@cumulusnetworks.com>

Ticket: CM-9527
Reviewed By: CCR-4174
Testing Done: Manual tests of various scenarios
This commit is contained in:
vivek 2016-02-25 19:39:25 +00:00
parent c8e264b60e
commit bfcd43b236
1 changed files with 62 additions and 0 deletions
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62
bgpd/bgp_zebra.c
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@ -540,6 +540,67 @@ bgp_interface_nbr_address_delete (int command, struct zclient *zclient,
return 0;
}
/* VRF update for an interface. */
static int
bgp_interface_vrf_update (int command, struct zclient *zclient, zebra_size_t length,
vrf_id_t vrf_id)
{
struct interface *ifp;
vrf_id_t new_vrf_id;
struct connected *c;
struct nbr_connected *nc;
struct listnode *node, *nnode;
struct bgp *bgp;
ifp = zebra_interface_vrf_update_read (zclient->ibuf, vrf_id, &new_vrf_id);
if (! ifp)
return 0;
if (BGP_DEBUG (zebra, ZEBRA) && ifp)
zlog_debug("Rx Intf VRF change VRF %u IF %s NewVRF %u",
vrf_id, ifp->name, new_vrf_id);
bgp = bgp_lookup_by_vrf_id (vrf_id);
if (!bgp)
return 0;
for (ALL_LIST_ELEMENTS (ifp->connected, node, nnode, c))
bgp_connected_delete (bgp, c);
for (ALL_LIST_ELEMENTS (ifp->nbr_connected, node, nnode, nc))
bgp_nbr_connected_delete (bgp, nc, 1);
/* Fast external-failover */
{
struct peer *peer;
if (CHECK_FLAG (bgp->flags, BGP_FLAG_NO_FAST_EXT_FAILOVER))
return 0;
for (ALL_LIST_ELEMENTS (bgp->peer, node, nnode, peer))
{
if ((peer->ttl != 1) && (peer->gtsm_hops != 1))
continue;
if (ifp == peer->nexthop.ifp)
BGP_EVENT_ADD (peer, BGP_Stop);
}
}
if_update_vrf (ifp, ifp->name, strlen (ifp->name), new_vrf_id);
bgp = bgp_lookup_by_vrf_id (new_vrf_id);
if (!bgp)
return 0;
for (ALL_LIST_ELEMENTS (ifp->connected, node, nnode, c))
bgp_connected_add (bgp, c);
for (ALL_LIST_ELEMENTS (ifp->nbr_connected, node, nnode, nc))
bgp_nbr_connected_add (bgp, nc);
return 0;
}
/* Zebra route add and delete treatment. */
static int
zebra_read_ipv4 (int command, struct zclient *zclient, zebra_size_t length,
@ -1993,6 +2054,7 @@ bgp_zebra_init (struct thread_master *master)
zclient->interface_address_delete = bgp_interface_address_delete;
zclient->interface_nbr_address_add = bgp_interface_nbr_address_add;
zclient->interface_nbr_address_delete = bgp_interface_nbr_address_delete;
zclient->interface_vrf_update = bgp_interface_vrf_update;
zclient->ipv4_route_add = zebra_read_ipv4;
zclient->ipv4_route_delete = zebra_read_ipv4;
zclient->redistribute_route_ipv4_add = zebra_read_ipv4;