Using supported NSM (statd) procedures
The NSM protocol defines six RPC procedures which implement the
network status manager. With the integration of NSM into the NFS server
address space, procedures 0 through 5 act as null procedures and return
no results if invoked externally. Procedure 6, however, is fully implemented.
The procedures are as follows:
- Procedure 0: do nothing
- Procedure 0 (NULL) does nothing
- Procedure 1: SM_STAT
- Dummy call, always return STAT_FAIL
- Procedure 2: SM_MON
- Monitor a client host
- Procedure 3: SM_UNMON
- Unmonitor a client host
- Procedure 4: SM_UNMON_ALL
- Unmonitor all client hosts
- Procedure 5: SM_SIMU_CRASH
- Simulate a crash
- Procedure 6: SM_NOTIFY
- NFS server notifies clients that server is restarting, so clients need to reclaim any locks they previously had on server files. This procedure is fully implemented by the z/OS NFS server.
Note: NSM is only active if the NFS server is started
with the NLM attribute set, not with NONLM.
For compatibility with supported NFS clients, it is important that the TCPIP.DATA file "HOSTNAME" parameter represent the hostname exactly as it is returned by a DNS query (that is, it is case sensitive).