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Commit 56dd18a4 authored by Roopa Prabhu's avatar Roopa Prabhu Committed by David S. Miller
Browse files

neigh: hook tracepoints in neigh update code 



hook tracepoints at the end of functions that
update a neigh entry. neigh_update gets an additional
tracepoint to trace the update flags and old and new
neigh states.

Signed-off-by: default avatarRoopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 9c03b282

net/core/neighbour.c

+11 −0
Original line number Diff line number Diff line
@@ -42,6 +42,8 @@ 
#include <linux/inetdevice.h>

#include <net/addrconf.h>



#include <trace/events/neigh.h>



#define DEBUG

#define NEIGH_DEBUG 1

#define neigh_dbg(level, fmt, ...)		\
@@ -102,6 +104,7 @@ static void neigh_cleanup_and_release(struct neighbour *neigh) 
	if (neigh->parms->neigh_cleanup)

		neigh->parms->neigh_cleanup(neigh);



	trace_neigh_cleanup_and_release(neigh, 0);

	__neigh_notify(neigh, RTM_DELNEIGH, 0, 0);

	call_netevent_notifiers(NETEVENT_NEIGH_UPDATE, neigh);

	neigh_release(neigh);
@@ -1095,6 +1098,8 @@ static void neigh_timer_handler(struct timer_list *t) 
	if (notify)

		neigh_update_notify(neigh, 0);



	trace_neigh_timer_handler(neigh, 0);



	neigh_release(neigh);

}
@@ -1165,6 +1170,7 @@ int __neigh_event_send(struct neighbour *neigh, struct sk_buff *skb) 
	else

		write_unlock(&neigh->lock);

	local_bh_enable();

	trace_neigh_event_send_done(neigh, rc);

	return rc;



out_dead:
@@ -1172,6 +1178,7 @@ int __neigh_event_send(struct neighbour *neigh, struct sk_buff *skb) 
		goto out_unlock_bh;

	write_unlock_bh(&neigh->lock);

	kfree_skb(skb);

	trace_neigh_event_send_dead(neigh, 1);

	return 1;

}

EXPORT_SYMBOL(__neigh_event_send);
@@ -1227,6 +1234,8 @@ static int __neigh_update(struct neighbour *neigh, const u8 *lladdr, 
	struct net_device *dev;

	int update_isrouter = 0;



	trace_neigh_update(neigh, lladdr, new, flags, nlmsg_pid);



	write_lock_bh(&neigh->lock);



	dev    = neigh->dev;
@@ -1393,6 +1402,8 @@ static int __neigh_update(struct neighbour *neigh, const u8 *lladdr, 
	if (notify)

		neigh_update_notify(neigh, nlmsg_pid);



	trace_neigh_update_done(neigh, err);



	return err;

}