lockd(8) - NetBSD Manual Pages

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RPC.LOCKD(8)            NetBSD System Manager's Manual            RPC.LOCKD(8)


NAME

     rpc.lockd -- NFS file locking daemon


SYNOPSIS

     rpc.lockd [-46] [-d debug_level] [-g grace_period]


DESCRIPTION

     The rpc.lockd daemon provides monitored and unmonitored file and record
     locking services in an NFS environment.  To monitor the status of hosts
     requesting locks, the locking daemon typically operates in conjunction
     with rpc.statd(8).

     Options and operands available for rpc.lockd:

     -4                 Listen for requests using IPv4.  Do not listen using
                        IPv6 unless the -6 option is also specified.  By
                        default, rpc.lockd listens for requests using both
                        IPv4 and IPv6 if available.

     -6                 Listen for requests using IPv6.  It is an error if
                        IPv6 is not available.

     -d debug_level     Cause debugging information to be written to syslog,
                        recording all RPC transactions to the daemon.  These
                        messages are logged with level LOG_DEBUG and facility
                        LOG_DAEMON.  Specifying a debug_level of 1 results in
                        the generation of one log line per protocol operation.
                        Higher debug levels can be specified, causing display
                        of operation arguments and internal operations of the
                        daemon.

     -g grace_period    Set the grace period (in seconds) to grace_period.
                        During the grace period rpc.lockd only accepts
                        requests from hosts which are reinitialising locks
                        which existed before the server restarted.  Default is
                        30 seconds.

     Error conditions are logged to syslog, irrespective of the debug level,
     using log level LOG_ERR and facility LOG_DAEMON.

     The rpc.lockd daemon must NOT be invoked by inetd(8) because the protocol
     assumes that the daemon will run from system start time.  Instead, it
     should be configured in rc.conf(5) to run at system startup.


FILES

     /usr/include/rpcsvc/nlm_prot.x  RPC protocol specification for the net-
                                     work lock manager protocol.


SEE ALSO

     syslog(3), rc.conf(5), rpc.statd(8)


STANDARDS

     The implementation is based on the specification in X/Open CAE Specifica-
     tion C218, "Protocols for X/Open PC Interworking: XNFS, Issue 4", ISBN 1
     872630 66 9.


HISTORY

     A version of rpc.lockd appeared in SunOS 4.


BUGS

     The current implementation provides only the server side of the protocol
     (i.e., clients running other OS types can establish locks on a NetBSD
     fileserver, but there is currently no means for a NetBSD client to estab-
     lish locks).

     The current implementation serialises lock requests that could be shared.

NetBSD 10.1                     August 11, 2012                    NetBSD 10.1