openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

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: Roopa Prabhu <roopa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Roopa Prabhu 2019-02-14 09:15:11 -08:00 committed by David S. Miller
parent 9c03b282ba
commit 56dd18a49f
1 changed files with 11 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
net/core/neighbour.c
View File

@ -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;
}