netdev - Fw: [Bug 201071] New: Creating a vxlan in state 'up' does not give proper RTM

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Date:   Mon, 10 Sep 2018 11:55:16 -0700
From:   Stephen Hemminger <stephen@...workplumber.org>
To:     Roopa Prabhu <roopa@...ulusnetworks.com>
Cc:     netdev@...r.kernel.org
Subject: Fw: [Bug 201071] New: Creating a vxlan in state 'up' does not give
 proper RTM_NEWLINK message



Begin forwarded message:

Date: Mon, 10 Sep 2018 04:04:37 +0000
From: bugzilla-daemon@...zilla.kernel.org
To: stephen@...workplumber.org
Subject: [Bug 201071] New: Creating a vxlan in state 'up' does not give proper RTM_NEWLINK message


https://bugzilla.kernel.org/show_bug.cgi?id=201071

            Bug ID: 201071
           Summary: Creating a vxlan in state 'up' does not give proper
                    RTM_NEWLINK message
           Product: Networking
           Version: 2.5
    Kernel Version: 4.19-rc1
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Other
          Assignee: stephen@...workplumber.org
          Reporter: liam.mcbirnie@...ing.com
        Regression: Yes

If a vxlan is created with state 'up', the RTM_NEWLINK message shows the state
as down, and there no other netlink messages are sent.
As a result, processes listening to netlink are never notified that the vxlan
link is up.

eg.
# ip link add test up type vxlan id 8 group 224.224.224.224 dev eth0

Output of ip monitor link
# 4: test: <BROADCAST,MULTICAST> mtu 1450 qdisc noop state DOWN group default
      link/ether ee:cd:97:1a:cf:91 brd ff:ff:ff:ff:ff:ff

Output of ip link show (expected from netlink message)
# 4: test: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1450 qdisc noqueue state
UNKNOWN group default qlen 1000
      link/ether ee:cd:97:1a:cf:91 brd ff:ff:ff:ff:ff:ff

This is a regression introduced by the following patch series.
https://patchwork.ozlabs.org/patch/947181/

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