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authorRoopa Prabhu <roopa@cumulusnetworks.com>2018-04-24 13:49:34 -0700
committerDavid S. Miller <davem@davemloft.net>2018-04-25 13:19:59 -0400
commit9ce33e46531d4b9f94b0fa135781e27c7c4e32e8 (patch)
treebc18c132cdc706b70ca1f77b38f0a8fd670d8660 /include/net/neighbour.h
parent0aef78aa7b39829a2a46c1c0e6e96276d744e07a (diff)
neighbour: support for NTF_EXT_LEARNED flag
This patch extends NTF_EXT_LEARNED support to the neighbour system. Example use-case: An Ethernet VPN implementation (eg in FRR routing suite) can use this flag to add dynamic reachable external neigh entires learned via control plane. The use of neigh NTF_EXT_LEARNED in this patch is consistent with its use with bridge and vxlan fdb entries. Signed-off-by: Roopa Prabhu <roopa@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/neighbour.h')
-rw-r--r--include/net/neighbour.h19
1 files changed, 18 insertions, 1 deletions
diff --git a/include/net/neighbour.h b/include/net/neighbour.h
index e421f86af043..6c1eecd56a4d 100644
--- a/include/net/neighbour.h
+++ b/include/net/neighbour.h
@@ -246,6 +246,7 @@ static inline void *neighbour_priv(const struct neighbour *n)
#define NEIGH_UPDATE_F_OVERRIDE 0x00000001
#define NEIGH_UPDATE_F_WEAK_OVERRIDE 0x00000002
#define NEIGH_UPDATE_F_OVERRIDE_ISROUTER 0x00000004
+#define NEIGH_UPDATE_F_EXT_LEARNED 0x20000000
#define NEIGH_UPDATE_F_ISROUTER 0x40000000
#define NEIGH_UPDATE_F_ADMIN 0x80000000
@@ -526,5 +527,21 @@ static inline void neigh_ha_snapshot(char *dst, const struct neighbour *n,
} while (read_seqretry(&n->ha_lock, seq));
}
-
+static inline void neigh_update_ext_learned(struct neighbour *neigh, u32 flags,
+ int *notify)
+{
+ u8 ndm_flags = 0;
+
+ if (!(flags & NEIGH_UPDATE_F_ADMIN))
+ return;
+
+ ndm_flags |= (flags & NEIGH_UPDATE_F_EXT_LEARNED) ? NTF_EXT_LEARNED : 0;
+ if ((neigh->flags ^ ndm_flags) & NTF_EXT_LEARNED) {
+ if (ndm_flags & NTF_EXT_LEARNED)
+ neigh->flags |= NTF_EXT_LEARNED;
+ else
+ neigh->flags &= ~NTF_EXT_LEARNED;
+ *notify = 1;
+ }
+}
#endif