Bug 514147 - TCP traffic for VLAN interfaces fails over mlx4_en parent interface.
Summary: TCP traffic for VLAN interfaces fails over mlx4_en parent interface.
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: kernel
Version: 5.4
Hardware: All
OS: Linux
urgent
urgent
Target Milestone: rc
: ---
Assignee: Doug Ledford
QA Contact: Red Hat Kernel QE team
URL:
Whiteboard:
Depends On:
Blocks: 520908
TreeView+ depends on / blocked
 
Reported: 2009-07-28 06:59 UTC by Yevgeny Petrilin
Modified: 2010-03-30 06:52 UTC (History)
10 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2010-03-30 06:52:03 UTC
Target Upstream Version:
Embargoed:


Attachments (Terms of Use)
Fix endianess bag when looking for VLAN tag (1.29 KB, patch)
2009-07-28 06:59 UTC, Yevgeny Petrilin
no flags Details | Diff


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2010:0178 0 normal SHIPPED_LIVE Important: Red Hat Enterprise Linux 5.5 kernel security and bug fix update 2010-03-29 12:18:21 UTC

Description Yevgeny Petrilin 2009-07-28 06:59:17 UTC
Created attachment 355364 [details]
Fix endianess bag when looking for VLAN tag

Description of problem:
TCP traffic for VLAN interfaces fails when the parent mlx4_en interface is configured to work with LRO.
This is an endianess bug in mlx4_en LRO flow that prevents the driver to see that the packet has a VLAN tag. The packet is not passed to the VLAN interface and dropped by the IP layer.
The bug occures when the IP address for the parent interface is not configured.
I attached the patch that fixes the issue.

Steps to Reproduce:
1. Load the mlx4_en driver without changing defaults.
2. Bring the mlx4_en interface up without configuring IP address (ifconfig eth<x> up
3. Create a VLAN interface over eth<x>
4. Try to run TCP traffic over the VLAN interface (scp, ssh)
  
Actual results:
The traffic fails

Expected results:
It should work correctlly

Comment 1 Chris Ward 2009-09-01 11:52:24 UTC
Tziporet, could we get your confirmation that you will be able to provide us with additional testing feedback once this request has been approved and a test build including the proposed patch set is available?

Comment 5 Don Zickus 2009-09-04 18:45:52 UTC
in kernel-2.6.18-165.el5
You can download this test kernel from http://people.redhat.com/dzickus/el5

Please do NOT transition this bugzilla state to VERIFIED until our QE team
has sent specific instructions indicating when to do so.  However feel free
to provide a comment indicating that this fix has been verified.

Comment 8 Chris Ward 2009-09-17 09:13:41 UTC
@Yevgeny Petrilin (yevgenyp.il)

Please grab the -165 kernel build from comment #5 and test to verify the resolution of this issue. Report results back to this bugzilla as soon as possible. The sooner we hear back from you, the sooner we'll be able to push the officially support bits out to RHN for general consumption.

Comment 10 Yevgeny Petrilin 2009-09-17 10:16:33 UTC
The issue is resolved in -165 kernel, Thanks

Comment 18 errata-xmlrpc 2010-03-30 06:52:03 UTC
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2010-0178.html


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