Bug 1378320

Summary: [LIO target] libfc: lookup request for XID = 65535, indicates invalid CPU 7
Product: Red Hat Enterprise Linux 7 Reporter: Bruno Goncalves <bgoncalv>
Component: kernelAssignee: Chris Leech <cleech>
kernel sub component: Storage Drivers QA Contact: Martin Hoyer <mhoyer>
Status: CLOSED ERRATA Docs Contact:
Severity: unspecified    
Priority: unspecified CC: jpittman
Version: 7.3   
Target Milestone: rc   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: kernel-3.10.0-590.el7 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2017-08-02 01:46:05 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 1422628    
Attachments:
Description Flags
posted patch none

Description Bruno Goncalves 2016-09-22 06:45:08 UTC 
Description of problem:
When a FCoE initiator connects to FCoE target this message appear several times and then they keep being show from time to time on FCoE target.

[260869.893050] fc_exch_find: 3 callbacks suppressed
[260869.916964] libfc: lookup request for XID = 65535, indicates invalid CPU 7
[260869.950810] libfc: lookup request for XID = 65535, indicates invalid CPU 7
[260869.986441] libfc: lookup request for XID = 65535, indicates invalid CPU 7
[260870.024911] libfc: lookup request for XID = 65535, indicates invalid CPU 7
[260870.065903] libfc: lookup request for XID = 65535, indicates invalid CPU 7
[260870.099080] libfc: lookup request for XID = 65535, indicates invalid CPU 7
[260870.132267] libfc: lookup request for XID = 65535, indicates invalid CPU 7
[260870.165661] libfc: lookup request for XID = 65535, indicates invalid CPU 7
[260870.165783] libfc: lookup request for XID = 65535, indicates invalid CPU 7
[260870.231764] libfc: lookup request for XID = 65535, indicates invalid CPU 7
[260875.008779] fc_exch_find: 448 callbacks suppressed
[260875.033460] libfc: lookup request for XID = 65535, indicates invalid CPU 7
...

Version-Release number of selected component (if applicable):
Kernel 3.10.0-506.el7

How reproducible:
100%

Steps to Reproduce:
1.Configure LIO FCoE target
2.Connect an FCoE initiator to it
3.Check for the messages on FCoE target
Comment 3 Chris Leech 2016-10-18 18:50:06 UTC 
The XID sanity check I added for bz#1190204 bz#1351356 didn't take into account that exchange lookups are attempted even for the reserved value of 0xffff (65535) that indicates an exchange originated by the other endpoint that we haven't assigned a responder ID to yet.  Rare case for an initiator, but normal operating behaviour for a target.

I'll get that cleaned up.
Comment 4 Chris Leech 2017-02-28 23:58:51 UTC 
Created attachment 1258556 [details]
posted patch
Comment 5 Rafael Aquini 2017-03-08 00:09:38 UTC 
Patch(es) committed on kernel repository and an interim kernel build is undergoing testing
Comment 7 Rafael Aquini 2017-03-08 21:47:08 UTC 
Patch(es) available on kernel-3.10.0-590.el7
Comment 9 Martin Hoyer 2017-06-05 07:24:30 UTC 
There are no more errors on FCoE target system after kernel update.
No regression found.
Comment 11 errata-xmlrpc 2017-08-02 01:46:05 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.

https://access.redhat.com/errata/RHSA-2017:1842
Comment 12 errata-xmlrpc 2017-08-02 02:20:27 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.

https://access.redhat.com/errata/RHSA-2017:1842