[NET]: Core net changes to generate netevents

Generate netevents for:
- neighbour changes
- routing redirects
- pmtu changes

Signed-off-by: Tom Tucker <tom@opengridcomputing.com>
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 9 insertions, 7 deletions

diff --git a/net/core/Makefile b/net/core/Makefile
index e9bd2467d5a9..2645ba428d48 100644
--- a/net/core/Makefile
+++ b/net/core/Makefile
@@ -7,7 +7,7 @@ obj-y := sock.o request_sock.o skbuff.o iovec.o datagram.o stream.o scm.o \
 
 obj-$(CONFIG_SYSCTL) += sysctl_net_core.o
 
-obj-y                += dev.o ethtool.o dev_mcast.o dst.o \
+obj-y                += dev.o ethtool.o dev_mcast.o dst.o netevent.o \
                         neighbour.o rtnetlink.o utils.o link_watch.o filter.o
 
 obj-$(CONFIG_XFRM) += flow.o
diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 7ad681f5e712..5130d2efdbbe 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -29,6 +29,7 @@
 #include <net/neighbour.h>
 #include <net/dst.h>
 #include <net/sock.h>
+#include <net/netevent.h>
 #include <linux/rtnetlink.h>
 #include <linux/random.h>
 #include <linux/string.h>
@@ -754,6 +755,7 @@ static void neigh_timer_handler(unsigned long arg)
                         neigh->nud_state = NUD_STALE;
                         neigh->updated = jiffies;
                         neigh_suspect(neigh);
+                        notify = 1;
                 }
         } else if (state & NUD_DELAY) {
                 if (time_before_eq(now, 
@@ -762,6 +764,7 @@ static void neigh_timer_handler(unsigned long arg)
                         neigh->nud_state = NUD_REACHABLE;
                         neigh->updated = jiffies;
                         neigh_connect(neigh);
+                        notify = 1;
                         next = neigh->confirmed + neigh->parms->reachable_time;
                 } else {
                         NEIGH_PRINTK2("neigh %p is probed.\n", neigh);
@@ -819,6 +822,8 @@ static void neigh_timer_handler(unsigned long arg)
 out:
                 write_unlock(&neigh->lock);
         }
+        if (notify)
+                call_netevent_notifiers(NETEVENT_NEIGH_UPDATE, neigh);
 
 #ifdef CONFIG_ARPD
         if (notify && neigh->parms->app_probes)
@@ -926,9 +931,7 @@ int neigh_update(struct neighbour *neigh, const u8 *lladdr, u8 new,
 {
         u8 old;
         int err;
-#ifdef CONFIG_ARPD
         int notify = 0;
-#endif
         struct net_device *dev;
         int update_isrouter = 0;
 
@@ -948,9 +951,7 @@ int neigh_update(struct neighbour *neigh, const u8 *lladdr, u8 new,
                         neigh_suspect(neigh);
                 neigh->nud_state = new;
                 err = 0;
-#ifdef CONFIG_ARPD
                 notify = old & NUD_VALID;
-#endif
                 goto out;
         }
 
@@ -1022,9 +1023,7 @@ int neigh_update(struct neighbour *neigh, const u8 *lladdr, u8 new,
                 if (!(new & NUD_CONNECTED))
                         neigh->confirmed = jiffies -
                                       (neigh->parms->base_reachable_time << 1);
-#ifdef CONFIG_ARPD
                 notify = 1;
-#endif
         }
         if (new == old)
                 goto out;
@@ -1056,6 +1055,9 @@ out:
                         (neigh->flags & ~NTF_ROUTER);
         }
         write_unlock_bh(&neigh->lock);
+
+        if (notify)
+                call_netevent_notifiers(NETEVENT_NEIGH_UPDATE, neigh);
 #ifdef CONFIG_ARPD
         if (notify && neigh->parms->app_probes)
                 neigh_app_notify(neigh);