Bug 2083077

Summary:	Add support in multipathd to listen for FPIN-Li events and mark effected paths as marginal
Product:	Red Hat Enterprise Linux 8	Reporter:	MUNEENDRA (Broadcom) <muneendra.kumar>
Component:	device-mapper-multipath	Assignee:	Ben Marzinski <bmarzins>
Status:	CLOSED ERRATA	QA Contact:	Lin Li <lilin>
Severity:	medium	Docs Contact:	Kristina Slaveykova <kslaveyk>
Priority:	high
Version:	8.7	CC:	agk, bmarzins, gfialova, heinzm, kslaveyk, lilin, msnitzer, prajnoha, zkabelac
Target Milestone:	rc	Keywords:	Triaged
Target Release:	---	Flags:	pm-rhel: mirror+
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	device-mapper-multipath-0.8.4-25.el8	Doc Type:	Enhancement
Doc Text:	.`multipathd` now supports detecting FPIN-Li events When you add a new value `fpin` for the `marginal_pathgroups` config option, you enable `multipathd` to monitor the Link Integrity Fabric Performance Impact Notification (PFIN-Li) events and move paths with link integrity issues to a marginal pathgroup. With the `fpin` value set, `multipathd` overrides its existing marginal path detection methods and relies on the Fibre Channel fabric to identify link integrity issues. With this enhancement, the `multipathd` method becomes more robust in detecting marginal paths on Fibre Channel fabrics that can issue PFIN-Li events.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-11-08 10:47:39 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:

Description MUNEENDRA (Broadcom) 2022-05-09 09:07:20 UTC

Description of problem:
When link integrity issues are detected on a Fibre Channel fabric, A Link Integrity Fabric Performance Impact Notification (FPIN-Li) can be send to a node. If multipathd listens for these events, it can use them to control a path's marginal status, instead of trying to detect marginal paths internally. The path will remain marginal until a registered state change notification (RSCN) or Link Up event is received.

Version-Release number of selected component (if applicable):
RHEL9.0



Actual results:
Multipathd has a more robust method of detecting marginal paths on Fibre Channel fabrics that can issue PFIN-Li events.


Additional info:
This feature is already part of RHEL9.0 (BZ:2053642).
Needs this feature as part of RHEL8.7 also

Comment 1 Ben Marzinski 2022-05-18 06:09:01 UTC

Backported.

Comment 2 Ben Marzinski 2022-05-26 20:46:57 UTC

Muneedra, would you be able to test these RHEL-8 rpms?

https://people.redhat.com/bmarzins/device-mapper-multipath/rpms/RHEL8/2083077/

Comment 3 MUNEENDRA (Broadcom) 2022-05-30 11:00:55 UTC

(In reply to Ben Marzinski from comment #2)
> Muneedra, would you be able to test these RHEL-8 rpms?
> 
> https://people.redhat.com/bmarzins/device-mapper-multipath/rpms/RHEL8/
> 2083077/

Benjamin,
we will do the testing and let you know the same.

Comment 8 Lin Li 2022-06-06 06:34:28 UTC

(In reply to MUNEENDRA (Broadcom) from comment #3)
> (In reply to Ben Marzinski from comment #2)
> > Muneedra, would you be able to test these RHEL-8 rpms?
> > 
> > https://people.redhat.com/bmarzins/device-mapper-multipath/rpms/RHEL8/
> > 2083077/
> 
> Benjamin,
> we will do the testing and let you know the same.

Any update?

Comment 9 MUNEENDRA (Broadcom) 2022-06-06 07:11:08 UTC

Will update in a day or two

Comment 10 Lin Li 2022-06-09 08:58:53 UTC

(In reply to MUNEENDRA (Broadcom) from comment #9)
> Will update in a day or two

Any update?

Comment 11 MUNEENDRA (Broadcom) 2022-06-09 09:40:39 UTC

(In reply to Lin Li from comment #10)
> (In reply to MUNEENDRA (Broadcom) from comment #9)
> > Will update in a day or two
> 
> Any update?

The functionality is not working as expected  with the initial rpm's provided by Benjamin.
Benjamin is providing the additional rpm's to debug the issue further.

Comment 12 MUNEENDRA (Broadcom) 2022-06-17 10:06:57 UTC

The latest rpm's provided by Benjamin is working as expected.
Thanks for all the help Benjamin.

Comment 13 Lin Li 2022-06-20 09:41:44 UTC

Move to verified according to comment 7 and comment 12.

Comment 15 errata-xmlrpc 2022-11-08 10:47:39 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 (device-mapper-multipath bug fix and enhancement update), 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/RHBA-2022:7714