[LU-12595] Attempt to add route using non-local gateway should return EHOSTUNREACH, not EINVAL

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.13.0, Lustre 2.12.4
• Affects Version/s: Lustre 2.13.0
• Severity: 3
• Assignee: Chris Horn
• Reporter: Chris Horn

Description

My fix (https://review.whamcloud.com/#/c/35198/2) for
LU-12411 was flawed. While we do not want to allow adding routes to unreachable gateways, this shouldn't be a fatal error when parsing routes entries. lnet_add_route() should return EHOSTUNREACH in such a case, so that lnet_parse_route() will continue working and add any routes that are reachable. Unreachable routes are still logged to the console, but they are not added to route table.

Issue Links

• is duplicated by: LU-12596 Return EHOSTUNREACH rather than EINVAL when adding route to unreachable gateway
• is related to: LU-12411 Hang on lnetctl route del