Bug 782001

Summary:	backport vlan support for pktgen
Product:	Red Hat Enterprise Linux 5	Reporter:	Jan Tluka <jtluka>
Component:	kernel	Assignee:	Jiri Pirko <jpirko>
Status:	CLOSED ERRATA	QA Contact:	Jan Tluka <jtluka>
Severity:	low	Docs Contact:
Priority:	medium
Version:	5.8	CC:	jpirko, lzheng, rkhan
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Release Note
Doc Text:	VLAN Support for pktgen VLAN support has been added to the pktgen module. The pktgen module is now able to produce 802.1Q tagged frames.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2013-01-08 04:20:01 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Jan Tluka 2012-01-16 10:08:25 UTC

Description of problem:

RHEL5 kernel currently does not support vlans in pktgen module. It's not possible to test kernel network stack with VLANs involved. The support has been added in 2.6.19 Linux kernel so the backport should be easy.

Version-Release number of selected component (if applicable):

kernel-2.6.18-303.el5

Steps to Reproduce:

Use any of the commands below to setup the packet generator.
 pgset "vlan_id 77"       set VLAN ID 0-4095
 pgset "vlan_p 3"         set priority bit 0-7 (default 0)
 pgset "vlan_cfi 0"       set canonical format identifier 0-1 (default 0)

or use echo alternatives:
 echo "vlan_id 77" > /proc/net/pktgen/eth0

Dump network traffic using tcpdump or wireshark network sniffer and check vlan id is applied.

Actual results:
Write error when trying to set VLAN id.

Expected results:
VLAN id is applied to pktgen traffic.

Comment 1 Jan Tluka 2012-01-16 10:23:27 UTC

commit	34954ddc4f3e790fb6d5ed331513f54b38713234

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=patch;h=34954ddc4f3e790fb6d5ed331513f54b38713234

Comment 2 Jiri Pirko 2012-01-16 10:37:48 UTC

0f37c6057414fb68024793966b1dcb6a135cb844 is needed as well.

Comment 5 RHEL Program Management 2012-03-30 14:20:59 UTC

This request was evaluated by Red Hat Product Management for inclusion
in a Red Hat Enterprise Linux release.  Product Management has
requested further review of this request by Red Hat Engineering, for
potential inclusion in a Red Hat Enterprise Linux release for currently
deployed products.  This request is not yet committed for inclusion in
a release.

Comment 8 Jan Tluka 2012-09-12 09:28:59 UTC

Verified on 2.6.18-339.el5 kernel.

pktgen module can be loaded and all supported vlan options can be set and applied on generated traffic.

Testing included following:

1. Setting VLAN id and it's priority
# echo "vlan_id 22" > /proc/net/pktgen/eth1
# echo "vlan_p 3" > /proc/net/pktgen/eth1

10:57:05.448307 52:54:00:aa:bb:c1 > 52:54:00:a5:bd:dc, ethertype 802.1Q (0x8100), length 62: vlan 22, p 3, ethertype IPv4, 192.168.122.2.9 > 192.168.122.1.9: UDP, length 16

3. CFI enabled:
# echo "vlan_cfi 1" > /proc/net/pktgen/eth1

11:03:37.678324 52:54:00:a5:bd:dc > ff:ff:ff:ff:ff:ff, ethertype 802.1Q (0x8100), length 46: vlan 22, p 0, ethertype ARP, Request who-has 192.168.122.2 tell 192.168.122.1, length 283. 

4. CFI disabled:
# echo "vlan_cfi 0" > /proc/net/pktgen/eth1

11:03:53.583772 52:54:00:aa:bb:c1 > 52:54:00:a5:bd:dc, ethertype 802.1Q (0x8100), length 62: vlan 22, p 3, ethertype IPv4, 192.168.122.2.9 > 192.168.122.1.9: UDP, length 16

5. Setting SVLAN id and it's priority:
# echo "svlan_id 4" > /proc/net/pktgen/eth1
echo "svlan_p 2" > /proc/net/pktgen/eth1

11:17:35.439637 52:54:00:aa:bb:c1 > 52:54:00:a5:bd:dc, ethertype 802.1Q (0x8100), length 66: vlan 4, p 2, ethertype 802.1Q, vlan 22, p 3, ethertype IPv4, 192.168.122.2.9 > 192.168.122.1.9: UDP, length 16

6. Disabling VLAN/SVLAN taggging:
# echo "svlan_id 4096" > /proc/net/pktgen/eth1

11:14:33.421531 52:54:00:aa:bb:c1 > 52:54:00:a5:bd:dc, ethertype IPv4 (0x0800), length 60: 192.168.122.2.9 > 192.168.122.1.9: UDP, length 18

Comment 10 errata-xmlrpc 2013-01-08 04:20:01 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHBA-2013-0006.html