[LU-18812] lnet: restrict IP addresses that socklnd listens on

• Type: Improvement
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.17.0
• Affects Version/s: Lustre 2.17.0
• Labels: easy lnet
• Severity: 3
• Assignee: Serguei Smirnov
• Reporter: Andreas Dilger

Description

The socklnd acceptor listens for new connections on port 988 by default on all IP addresses:

# netstat -an | grep -w 988
tcp        0      0 0.0.0.0:988             0.0.0.0:*               LISTEN     
tcp        0      0 192.168.20.159:1022     192.168.20.1:988        ESTABLISHED
tcp        0      0 192.168.20.159:1023     192.168.20.1:988        ESTABLISHED
tcp        0      0 192.168.20.159:1021     192.168.20.1:988        ESTABLISHED

In some scenarios, it is desirable to not listen for connections on all addresses. It should be possible to limit the acceptor to listen only on specific addresses.

Issue Links

• is related to: LU-19216 run IPv6 Autotest session by default
• is related to: LU-19248 sanity-lnet: Failed to add net tcp on if test1pg