[LU-14164] libcfs_str2nid() gives undesirable output

• Type: Bug
• Resolution: Unresolved
• Priority: Minor
• Severity: 3
• Assignee: WC Triage
• Reporter: Amir Shehata (Inactive)

Description

On my system (for some reason) resolving an unknown hostname returns the loopback IP (127.0.0.1).

># getent hosts mgs.exports.192.168.122.100
::1 mgs.exports.192.168.122.100.localhost 

this ends up breaking specific commands, like

 lctl get_param -n *.MGS*[e-mail]

this ends up trying to look at:

 mgs/mgs/exports/192/168/122/100@tcp999/uuid

The reason is that get hostbyname() called from clean_path()->libcfs_str2nid() returns 127.0.0.1 for "exports.192.168.122.100". This leads the to the NID not found in the string which leads to the IP address being included in the path.

To be clear this seems to be an issue on my setup. Filing this ticket to raise awareness that this could happen.

I ran into it while trying to run sanity-sec:test_31