Bug 1814773

Summary:	Backport "add config to disable use of kernel nexthops"
Product:	[Fedora] Fedora	Reporter:	Ido Schimmel <idosch>
Component:	frr	Assignee:	Michal Ruprich <mruprich>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	31	CC:	mruprich
Target Milestone:	---
Target Release:	---
Hardware:	Unspecified
OS:	Linux
Whiteboard:
Fixed In Version:	frr-7.3.1-2.fc32 frr-7.3.1-1.fc31	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-06-27 02:06:06 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 Ido Schimmel 2020-03-18 16:18:25 UTC

Description of problem:

FRR 7.3+ automatically enables support for nexthop objects [1] if the
kernel supports it (kernels 5.3+ support it). While nexthop objects are
supported by the kernel, they are not supported by the upstream mlxsw
driver that needs to program them to the switch ASIC. This prevents routes
from being installed to the kernel when the driver is loaded and errors
such as the following are generated:

"zebra[11117]: Extended Error: mlxsw_spectrum: IPv4 route with nexthop
objects is not supported"

In FRR 7.3 it is not possible to disable the use of nexthop objects, but
such an option was added after the 7.3 release by this commit [2].

FRR maintainers have agreed to cherry-pick this commit to the 7.3 branch [3],
but currently there is no dot release that includes the commit.

Would it be possible for Fedora to re-build the package with this commit
until a new dot release is available?

Version-Release number of selected component (if applicable):
7.3.1

How reproducible:
Try to install routes when the mlxsw driver is loaded

Steps to Reproduce:
1.
2.
3.

Actual results:
Routes are not installed and following error is generated:

"zebra[11117]: Extended Error: mlxsw_spectrum: IPv4 route with nexthop
objects is not supported"

Expected results:
Routes are installed to the kernel

Additional info:

[1] https://linuxplumbersconf.org/event/4/contributions/434/attachments/251/436/nexthop-objects-talk.pdf
[2] https://github.com/FRRouting/frr/commit/7c99d51bebb62bd06b6ca3b01291cf35f55c4e88
[3] https://github.com/FRRouting/frr/commit/997ad79fe468ea0bbbe475edb788baab1eeba4d0

Comment 1 Michal Ruprich 2020-05-18 13:36:44 UTC

(In reply to Ido Schimmel from comment #0)
> Would it be possible for Fedora to re-build the package with this commit
> until a new dot release is available?
> 
I see no reason why not. I would like to fix a couple of other bugs on frr. I will fix this together with releasing the 7.3.1 version.

Comment 2 Fedora Update System 2020-06-18 10:49:42 UTC

FEDORA-2020-116a61bd59 has been submitted as an update to Fedora 32. https://bodhi.fedoraproject.org/updates/FEDORA-2020-116a61bd59

Comment 3 Fedora Update System 2020-06-18 10:49:42 UTC

FEDORA-2020-efc4892faa has been submitted as an update to Fedora 31. https://bodhi.fedoraproject.org/updates/FEDORA-2020-efc4892faa

Comment 4 Michal Ruprich 2020-06-18 10:53:14 UTC

Hi Ido,

I am sorry this took so long. I had other things I needed to finish. It should be available now in F31 up to Rawhide.

Comment 5 Ido Schimmel 2020-06-18 10:54:40 UTC

(In reply to Michal Ruprich 🐧 from comment #4)
> Hi Ido,
> 
> I am sorry this took so long. I had other things I needed to finish. It
> should be available now in F31 up to Rawhide.

No problem. Thanks a lot!

Comment 6 Fedora Update System 2020-06-19 16:13:46 UTC

FEDORA-2020-efc4892faa has been pushed to the Fedora 31 testing repository.
In short time you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --advisory=FEDORA-2020-efc4892faa`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2020-efc4892faa

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 7 Fedora Update System 2020-06-19 21:55:03 UTC

FEDORA-2020-116a61bd59 has been pushed to the Fedora 32 testing repository.
In short time you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --advisory=FEDORA-2020-116a61bd59`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2020-116a61bd59

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 8 Fedora Update System 2020-06-27 02:06:06 UTC

FEDORA-2020-116a61bd59 has been pushed to the Fedora 32 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 9 Fedora Update System 2020-06-27 03:07:10 UTC

FEDORA-2020-efc4892faa has been pushed to the Fedora 31 stable repository.
If problem still persists, please make note of it in this bug report.