[mpls-linux-general] BUG FIX: mplsadm+ingress policing

[Elio F. <el...@ti...>]

The network is:

HOST_A      LER_A                     LER_B             HOST_B
    |   10.0.1.    |         |  131.114.33.  |   |  192.168.4.   |
   ---------------       ----------------       ------------------
     .2             .1     .172             .200    .2                   .1

On LER_A
$TC qdisc add dev $INDEV handle ffff: ingress

mplsadm -L eth0:0

mplsadm -v -A -O gen:30:eth0:ipv4:131.114.33.200
KEY1=`grep 'gen 30' /proc/net/mpls_out | cut -d' ' -f1`
$TC filter add dev $INDEV parent ffff: protocol ip prio 1 u32 match ip
src 10.0.1.2

On LER_B

mplsadm -L eth0:0
mplsadm -A -I gen:30:0

I think the problem is: when the pk forwarding from 10.0.1.2 to
192.168.4.1 comes to ip_recv(  ) on LER_A,  ip_recv( ) doesn't  find
the fib.

So I've added :
on LER_A
mplsadm -v -B gen:30:eth0 -f 192.168.4.1

and patched the kernel file : /usr/src/linux/net/sched/sch_ingress
deleting  skb->mpls_index = TC_H_MIN(res.classid); and adding
skb->mpls_index = res.classid;

Now the ingress policing works

Any comments/help

Thanks in advance

Elio