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Commit 8d71740c authored by Tom Tucker's avatar Tom Tucker Committed by David S. Miller
Browse files

[NET]: Core net changes to generate netevents 



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

Signed-off-by: default avatarTom Tucker <tom@opengridcomputing.com>
Signed-off-by: default avatarSteve Wise <swise@opengridcomputing.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 792d1932

net/core/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -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

net/core/neighbour.c

+8 −6
Original line number Diff line number Diff line
@@ -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 @@ int neigh_update(struct neighbour *neigh, const u8 *lladdr, u8 new, 
			(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);

net/ipv4/route.c

+8 −0
Original line number Diff line number Diff line
@@ -104,6 +104,7 @@ 
#include <net/icmp.h>

#include <net/xfrm.h>

#include <net/ip_mp_alg.h>

#include <net/netevent.h>

#ifdef CONFIG_SYSCTL

#include <linux/sysctl.h>

#endif
@@ -1125,6 +1126,7 @@ void ip_rt_redirect(u32 old_gw, u32 daddr, u32 new_gw, 
	struct rtable *rth, **rthp;

	u32  skeys[2] = { saddr, 0 };

	int  ikeys[2] = { dev->ifindex, 0 };

	struct netevent_redirect netevent;



	if (!in_dev)

		return;
@@ -1217,6 +1219,11 @@ void ip_rt_redirect(u32 old_gw, u32 daddr, u32 new_gw, 
					goto do_next;

				}

				

				netevent.old = &rth->u.dst;

				netevent.new = &rt->u.dst;

				call_netevent_notifiers(NETEVENT_REDIRECT, 

						        &netevent);



				rt_del(hash, rth);

				if (!rt_intern_hash(hash, rt, &rt))

					ip_rt_put(rt);
@@ -1452,6 +1459,7 @@ static void ip_rt_update_pmtu(struct dst_entry *dst, u32 mtu) 
		}

		dst->metrics[RTAX_MTU-1] = mtu;

		dst_set_expires(dst, ip_rt_mtu_expires);

		call_netevent_notifiers(NETEVENT_PMTU_UPDATE, dst);

	}

}

net/ipv6/route.c

+7 −0
Original line number Diff line number Diff line
@@ -53,6 +53,7 @@ 
#include <linux/rtnetlink.h>

#include <net/dst.h>

#include <net/xfrm.h>

#include <net/netevent.h>



#include <asm/uaccess.h>
@@ -742,6 +743,7 @@ static void ip6_rt_update_pmtu(struct dst_entry *dst, u32 mtu) 
			dst->metrics[RTAX_FEATURES-1] |= RTAX_FEATURE_ALLFRAG;

		}

		dst->metrics[RTAX_MTU-1] = mtu;

		call_netevent_notifiers(NETEVENT_PMTU_UPDATE, dst);

	}

}
@@ -1155,6 +1157,7 @@ void rt6_redirect(struct in6_addr *dest, struct in6_addr *saddr, 
	struct rt6_info *rt, *nrt = NULL;

	int strict;

	struct fib6_node *fn;

	struct netevent_redirect netevent;



	/*

	 * Get the "current" route for this destination and
@@ -1252,6 +1255,10 @@ void rt6_redirect(struct in6_addr *dest, struct in6_addr *saddr, 
	if (ip6_ins_rt(nrt, NULL, NULL, NULL))

		goto out;



	netevent.old = &rt->u.dst;

	netevent.new = &nrt->u.dst;

	call_netevent_notifiers(NETEVENT_REDIRECT, &netevent);



	if (rt->rt6i_flags&RTF_CACHE) {

		ip6_del_rt(rt, NULL, NULL, NULL);

		return;