[LU-17649] fix -EACCESS connection error handling

• Type: Bug
• Resolution: Unresolved
• Priority: Minor
• Severity: 3
• Assignee: Mikhail Pershin
• Reporter: Mikhail Pershin

Description

When connection request receives -EACCESS/-EROFS it leaves import in intermediate state. While obd_no_recov is set on OBD, related import is still active as well as pinger. That leads to continious reconnect attempts and possibly successful import recovery if server updates own security preferencies. After that import is evicted and recovered to FULL state but OBD still has obd_no_recov so any other RPC over such import return -ESHUTDOWN all the time and import can't be neither activated nor recovered

Correct solution could be the stopping pinger and closing import or not setting obd_no_recov at all but set imp_deactive instead. The latter would allow import to be recovered manually and that is more flexible option than closing it immediately

Also for target-target connections like LWP, MDT-OST and MDT-MDT would be better to never stop import but keep connecting considering that is temporary and either remote target will reconfigure own security or target itself requires administrative attention.