ports/163955: input packet for interface are counted twice

[Eugen Konkov]

>Number:         163955
>Category:       ports
>Synopsis:       input packet for interface are counted twice
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-ports-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Jan 09 12:20:12 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator:     Eugen Konkov
>Release:        9.0-RELEASE
>Organization:
ISP FreeLine
>Environment:
# uname -a
FreeBSD  9.0-RELEASE FreeBSD 9.0-RELEASE #0 r229830: Mon Jan  9 02:53:51 EET 2012     :/usr/obj/usr/src.svn/9.0.0/sys/KES_KERN_v9  i386

>Description:
input packets for interface are counted twice. packed are twiced for all interfaced in system.



>How-To-Repeat:
# get stat by snmp:

octetsIn:24526413 octetsOut:37921853 packetsIn:46927 packetsOut:72314

# ping -c 3 10.11.19.145
PING 10.11.19.145 (10.11.19.145): 56 data bytes
64 bytes from 10.11.19.145: icmp_seq=0 ttl=64 time=0.222 ms
64 bytes from 10.11.19.145: icmp_seq=1 ttl=64 time=0.393 ms
64 bytes from 10.11.19.145: icmp_seq=2 ttl=64 time=0.385 ms

--- 10.11.19.145 ping statistics ---
3 packets transmitted, 3 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 0.222/0.333/0.393/0.079 ms

octetsIn:24526707 octetsOut:37922147 packetsIn:46933 packetsOut:72317

diff:        294                 294               6                3

as you can notice octets are same, but input packets counted twice

# tcpdump -n -i vlan7
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on vlan7, link-type EN10MB (Ethernet), capture size 65535 bytes
14:05:48.826901 IP 10.11.19.149 > 10.11.19.145: ICMP echo request, id 39685, seq 0, length 64
14:05:48.827092 IP 10.11.19.145 > 10.11.19.149: ICMP echo reply, id 39685, seq 0, length 64
14:05:49.827133 IP 10.11.19.149 > 10.11.19.145: ICMP echo request, id 39685, seq 1, length 64
14:05:49.827485 IP 10.11.19.145 > 10.11.19.149: ICMP echo reply, id 39685, seq 1, length 64
14:05:50.827370 IP 10.11.19.149 > 10.11.19.145: ICMP echo request, id 39685, seq 2, length 64
14:05:50.827718 IP 10.11.19.145 > 10.11.19.149: ICMP echo reply, id 39685, seq 2, length 64
^C
6 packets captured
6 packets received by filter
0 packets dropped by kernel

>Fix:
there were patch in current for vlan: output packets were not couted at all.
Maybe this is related issue

>Release-Note:
>Audit-Trail:
>Unformatted: