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neighbour: allow admin to set NTF_ROUTER

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This patch allows admin setting of NTF_ROUTER flag
on a neighbour entry. This enables external control
plane (like bgp evpn) to manage neigh entries with
NTF_ROUTER flag.

Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Roopa Prabhu 2018-09-22 21:26:19 -07:00 committed by David S. Miller
parent ea49c6f0ba
commit f7aa74e483
1 changed files with 7 additions and 2 deletions
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9
net/core/neighbour.c
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@ -1712,7 +1712,8 @@ out:
static int neigh_add(struct sk_buff *skb, struct nlmsghdr *nlh,
struct netlink_ext_ack *extack)
{
int flags = NEIGH_UPDATE_F_ADMIN | NEIGH_UPDATE_F_OVERRIDE;
int flags = NEIGH_UPDATE_F_ADMIN | NEIGH_UPDATE_F_OVERRIDE |
NEIGH_UPDATE_F_OVERRIDE_ISROUTER;
struct net *net = sock_net(skb->sk);
struct ndmsg *ndm;
struct nlattr *tb[NDA_MAX+1];
@ -1787,12 +1788,16 @@ static int neigh_add(struct sk_buff *skb, struct nlmsghdr *nlh,
}
if (!(nlh->nlmsg_flags & NLM_F_REPLACE))
flags &= ~NEIGH_UPDATE_F_OVERRIDE;
flags &= ~(NEIGH_UPDATE_F_OVERRIDE |
NEIGH_UPDATE_F_OVERRIDE_ISROUTER);
}
if (ndm->ndm_flags & NTF_EXT_LEARNED)
flags |= NEIGH_UPDATE_F_EXT_LEARNED;
if (ndm->ndm_flags & NTF_ROUTER)
flags |= NEIGH_UPDATE_F_ISROUTER;
if (ndm->ndm_flags & NTF_USE) {
neigh_event_send(neigh, NULL);
err = 0;