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Bug 1600672

Summary:	[BACKPORT] RFE: Make multipath able to blacklist by protocol/transport
Product:	Red Hat Enterprise Linux 7	Reporter:	Ala Hino <ahino>
Component:	device-mapper-multipath	Assignee:	Ben Marzinski <bmarzins>
Status:	CLOSED DUPLICATE	QA Contact:	Lin Li <lilin>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	7.5	CC:	agk, bmarzins, heinzm, lilin, msnitzer, nsoffer, prajnoha, rhandlin, salmy, toneata
Target Milestone:	rc	Keywords:	FutureFeature, ZStream
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-07-23 16:48:28 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:	1593459
Bug Blocks:	1016535

Description Ala Hino 2018-07-12 18:17:10 UTC

Description of problem:

This bug opened for BZ 1593459 backport purpose.

Right now, there is no way to easily tell multipath that you want to blacklist or whitelist devices based on what protocol and transport method that they are using. You can't easily (for instance) blacklist all devices except scsi devices using Fibre Channel or iSCSI. To solve this multipath needs a new blacklist/blacklist_exceptions type, "protocol". This will allow you to do things like

blacklist {
        protocol ".*"
}

blacklist_exceptions {
        protocol "(scsi:fcp|scsi:iscsi)"

Comment 3 Ben Marzinski 2018-07-13 20:21:37 UTC

This change is largely self-contained, and I'm fine with backporting it.

Comment 4 Ben Marzinski 2018-07-18 02:05:50 UTC

1593459 is the RHEL-7.6 bug. This one is supposed to be a zstream bug. I don't actually know the process to go through to create a zstream bug. So, if requesting the rhel-7.5.z flag, and adding the ZStream flag isn't right way to go about this (I'm pretty sure that PM is supposed to be the ones setting up zstream bugs, so I assume that there is more to it that just this) then I'd like to request a zstream bug. RHEV can provide the business justification, if necessary.