[LU-18317] LNet: unable to configure an o2ib NID using IPv6 address

• Type: Bug
• Resolution: Unresolved
• Priority: Minor
• Affects Version/s: Lustre 2.16.0
• Labels: IPv6 lnet o2iblnd
• Severity: 3
• Assignee: WC Triage
• Reporter: Serguei Smirnov

Description

Configuring IPv6 NID on an IB interface using o2ib net fails with an error if "lnetctl net add --nid" is used

# lnetctl net add --nid 2001::211:2233:4455:201@o2ib
---
add:
-     net: 
      errno: -22
      descr: ! "unsupported NID"

 

Configuring IPv6 NID on an IB interface using o2ib net results in a corrupt IPv4-style NID if "lnetctl net add --net o2ib --if ib0" is used and first address listed for the interface is IPv6 global

# ip a
...
4: ib0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 2044 qdisc mq state DOWN group default qlen 256
    link/infiniband 00:00:05:26:fe:80:00:00:00:00:00:00:00:11:22:33:44:55:02:00 brd 00:ff:ff:ff:ff:12:40:1b:ff:ff:00:00:00:00:00:00:ff:ff:ff:ff
    inet6 2001::211:2233:4455:201/64 scope global 
       valid_lft forever preferred_lft forever
    inet6 fe80::211:2233:4455:200/64 scope link 
       valid_lft forever preferred_lft forever
...
# modprobe lnet
# lnetctl lnet configure
# lnetctl net add --net o2ib --if ib0
# lnetctl net show
net:
-     net type: lo
      local NI(s):
      -     nid: 0@lo
            status: up
-     net type: o2ib
      local NI(s):
      -     nid: 32.1.0.0@o2ib
            status: down
            interfaces:
                  0: ib0