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Bug 1912412

Summary:	need better help info for bareudp in iproute2
Product:	Red Hat Enterprise Linux 8	Reporter:	Mingyu Shi <mshi>
Component:	iproute	Assignee:	Andrea Claudi <aclaudi>
Status:	CLOSED ERRATA	QA Contact:	Mingyu Shi <mshi>
Severity:	low	Docs Contact:
Priority:	low
Version:	8.4	CC:	aclaudi, atragler, gnault, jiji, lmiksik, mshi, sukulkar, yuma
Target Milestone:	rc	Keywords:	Triaged
Target Release:	8.5	Flags:	pm-rhel: mirror+
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	iproute-5.9.0-4.el8	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:
Clones:	1937861 (view as bug list)		Environment:
Last Closed:	2021-05-18 15:00:18 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:	1937861

Description Mingyu Shi 2021-01-04 11:54:33 UTC

Description of problem:
Now the help info and manual of bareudp is not precise enough, hope we can improve them.
For example, the output of 'ip link help bareudp':
Usage: ... bareudp dstport PORT
		ethertype PROTO
		[ srcportmin PORT ]
		[ [no]multiproto ]

Where:	PORT       := 0-65535
	PROTO      := NUMBER | ip | mpls
	SRCPORTMIN := 0-65535

For PROTO field, actually we can use ip(or ipv4), ipv6, mpls_uc or IEEE ether type numbers. But in here it tells us "ip | mpls", no ipv6 and in fact you cannot set it as string 'mpls', can we make it more clear?

Version-Release number of selected component (if applicable):
iproute-5.9.0-1.el8.x86_64

How reproducible:
100%

Steps to Reproduce:
ip link help bareudp
man ip-link

Actual results:
Not clear for PROTO field

Expected results:
More clear.

Additional info:

Comment 1 Guillaume Nault 2021-02-03 09:37:31 UTC

This is now fixed upstream with commit 86d9660dc180 ("iplink_bareudp: cleanup help message and man page"):
  https://git.kernel.org/pub/scm/network/iproute2/iproute2.git/commit/?id=86d9660dc1805be4435497ff194f618535e8fc97

Comment 2 Andrea Claudi 2021-02-03 16:36:39 UTC

Thanks Guillaume! Mingyu, please consider granting qa_ack+ and setting ITM, I'll try to squeeze this into rhel-8.4.

Comment 7 Mingyu Shi 2021-03-09 02:04:01 UTC

Tried with iproute-5.9.0-4.el8.x86_64, the new description looks good:

# ip link help bareudp
Usage: ... bareudp dstport PORT
		ethertype PROTO
		[ srcportmin PORT ]
		[ [no]multiproto ]

Where:	PORT  := UDP_PORT
	PROTO := ETHERTYPE

Note: ETHERTYPE can be given as number or as protocol name ("ipv4", "ipv6",
      "mpls_uc", etc.).


# man ip-link
Note: ETHERTYPE can be given as number or as protocol name ("ipv4", "ipv6",
      "mpls_uc", etc.).


       Bareudp Type Support
              For a link of type Bareudp the following additional arguments are supported:

              ip link add DEVICE type bareudp dstport PORT ethertype PROTO [ srcportmin PORT ] [ [no]multiproto ]

                      dstport PORT - specifies the destination port for the UDP tunnel.

                      ethertype PROTO - specifies the ethertype of the L3 protocol being tunnelled.  ethertype can be given as plain Ethernet protocol number or using the protocol name ("ipv4", "ipv6", "mpls_uc", etc.).

                      srcportmin PORT - selects the lowest value of the UDP tunnel source port range.

                      [no]multiproto - activates support for protocols similar to the one specified by ethertype.  When ethertype is "mpls_uc" (that is, unicast MPLS), this allows the tunnel to also handle multicast MPLS.  When ethertype is "ipv4", this allows the
                      tunnel to also handle IPv6. This option is disabled by default.

Comment 8 Andrea Claudi 2021-03-09 09:36:35 UTC

iproute-5.9.0-4.el8.x86_64 CI tests, passed: https://dashboard.osci.redhat.com/#/artifact/brew-build/aid/35311555

Comment 13 Mingyu Shi 2021-03-16 02:20:18 UTC

Verified with iproute-5.9.0-4.el8.x86_64
Just as #c7

Comment 15 errata-xmlrpc 2021-05-18 15:00:18 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 (iproute 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-2021:1653