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-.\" Copyright 1989 AT&T
-.\" Copyright (c) 2004, Sun Microsystems, Inc. All Rights Reserved.
-.\" Copyright 2016 Nexenta Systems, Inc.
-.\" Copyright 2020 Joyent, Inc.
-.\"
-.Dd November 22, 2021
-.Dt NFS 4
-.Os
-.Sh NAME
-.Nm nfs
-.Nd NFS configuration properties
-.Sh DESCRIPTION
-The behavior of the
-.Xr nfsd 1M ,
-.Xr nfsmapid 1M ,
-.Xr lockd 1M ,
-and
-.Xr mountd 1M
-daemons and
-.Xr mount_nfs 1M
-command is controlled by property values that are stored in the Service
-Management Facility, smf(5).
-The
-.Xr sharectl 1M
-command should be used to query or change values for these properties.
-.Pp
-Changes made to
-.Nm
-property values on the
-.Nm nfsd ,
-.Nm lockd ,
-.Nm mountd ,
-or
-.Nm mount_nfs
-command line override the values set using
-.Xr sharectl 1M .
-.Pp
-The following list describes the properties:
-.Bl -tag -width Ds
-.It Xo
-.Sy client_versmin Ns = Ns Ar num
-.br
-.Sy client_versmax Ns = Ns Ar num
-.Xc
-The NFS client only uses NFS versions in the range specified by these
-properties.
-Valid values of versions are: 2, 3, and 4.
-Default minimum version is
-.Li 2 ,
-while default maximum is
-.Li 4 .
-.Pp
-You can override this range on a per-mount basis by using the
-.Fl o Sy vers Ns =
-option to
-.Xr mount_nfs 1M .
-.It Xo
-.Sy server_versmin Ns = Ns Ar num
-.br
-.Sy server_versmax Ns = Ns Ar num
-.Xc
-The NFS server only uses NFS versions in the range specified by these
-properties.
-Valid values of versions are: 2, 3, and 4.
-Default minimum version is
-.Li 2 ,
-while the default maximum version is
-.Li 4 .
-.It Sy server_delegation Ns = Ns Sy on Ns | Ns Sy off
-By default the NFS server provides delegations to clients.
-The user can turn off delegations for all exported filesystems by setting this
-variable to
-.Li off .
-This variable only applies to NFS Version 4.
-.It Sy nfsmapid_domain Ns = Ns Op Ar string
-By default, the
-.Nm nfsmapid
-uses the DNS domain of the system.
-This setting overrides the default.
-This domain is used for identifying user and group attribute strings in the NFS
-Version 4 protocol.
-Clients and servers must match with this domain for operation to proceed
-normally.
-This variable only applies to NFS Version 4.
-See
-.Sx Setting nfsmapid_domain
-below for further details.
-.It Sy max_connections Ns = Ns Ar num
-Sets the maximum number of concurrent, connection-oriented connections.
-The default is
-.Li -1
-.Pq unlimited .
-Equivalent to the
-.Fl c
-option in
-.Nm nfsd .
-.It Sy listen_backlog Ns = Ns Ar num
-Set connection queue length for the NFS over a connection-oriented transport.
-The default value is
-.Li 32 ,
-meaning 32 entries in the queue.
-Equivalent to the
-.Fl l
-option in
-.Nm nfsd .
-.It Sy protocol Ns = Ns Op Sy all Ns | Ns Ar protocol
-Start
-.Nm nfsd
-over the specified protocol only.
-Equivalent to the
-.Fl p
-option in
-.Nm nfsd .
-.Sy all
-is equivalent to
-.Fl a
-on the
-.Nm nfsd
-command line.
-Mutually exclusive of
-.Sy device .
-For the UDP protocol, only version 2 and version 3 service is established.
-NFS Version 4 is not supported for the UDP protocol.
-.It Sy device Ns = Ns Op Ar devname
-Start NFS daemon for the transport specified by the given device only.
-Equivalent to the
-.Fl t
-option in
-.Nm nfsd .
-Mutually exclusive of
-.Sy protocol .
-.It Sy servers Ns = Ns Ar num
-Maximum number of concurrent NFS requests.
-Equivalent to last numeric argument on the
-.Nm nfsd
-command line.
-The default is
-.Li 1024 .
-.It Sy lockd_listen_backlog Ns = Ns Ar num
-Set connection queue length for
-.Nm lockd
-over a connection-oriented transport.
-The default and minimum value is
-.Li 32 .
-.It Sy lockd_servers Ns = Ns Ar num
-Maximum number of concurrent
-.Nm lockd
-requests.
-The default is 256.
-.It Sy lockd_retransmit_timeout Ns = Ns Ar num
-Retransmit timeout, in seconds, before
-.Nm lockd
-retries.
-The default is
-.Li 5 .
-.It Sy grace_period Ns = Ns Ar num
-Grace period, in seconds, that all clients
-.Pq both NLM and NFSv4
-have to reclaim locks after a server reboot.
-This parameter also controls the NFSv4 lease interval.
-The default is
-.Li 90 .
-.It Sy mountd_listen_backlog Ns = Ns Ar num
-Set the connection queue length for
-.Nm mountd
-over a connection-oriented transport.
-The default value is
-.Li 64 .
-.It Sy mountd_max_threads Ns = Ns Ar num
-Maximum number of threads for
-.Nm mountd .
-The default value is
-.Li 16 .
-.It Sy mountd_port Ns = Ns Ar num
-The IP port number on which
-.Nm mountd
-should listen.
-The default value is
-.Li 0 ,
-which means it should use a default binding.
-.It Sy statd_port Ns = Ns Ar num
-The IP port number on which
-.Nm statd
-should listen.
-The default value is
-.Li 0 ,
-which means it should use a default binding.
-.El
-.Ss Setting nfsmapid_domain
-As described above, the setting for
-.Sy nfsmapid_domain
-overrides the domain used by
-.Xr nfsmapid 1M
-for building and comparing outbound and inbound attribute strings, respectively.
-This setting overrides any other mechanism for setting the NFSv4 domain.
-In the absence of a
-.Sy nfsmapid_domain
-setting, the
-.Xr nfsmapid 1M
-daemon determines the NFSv4 domain as follows:
-.Bl -bullet
-.It
-If a properly configured
-.Pa /etc/resolv.conf
-.Po see
-.Xr resolv.conf 4
-.Pc
-exists,
-.Nm nfsmapid
-queries specified nameserver(s) for the domain.
-.It
-If a properly configured
-.Pa /etc/resolv.conf
-.Po see
-.Xr resolv.conf 4
-.Pc
-exists, but the queried nameserver does not have a proper record of the domain
-name,
-.Nm nfsmapid
-attempts to obtain the domain name through the BIND interface
-.Po see
-.Xr resolver 3RESOLV
-.Pc .
-.It
-If no
-.Pa /etc/resolv.conf
-exists,
-.Nm nfsmapid
-falls back on using the configured domain name
-.Po see
-.Xr domainname 1M
-.Pc ,
-which is returned with the leading domain suffix removed.
-For example, for
-.Li widgets.sales.example.com ,
-.Li sales.example.com
-is returned.
-.It
-If
-.Pa /etc/resolv.conf
-does not exist, no domain name has been configured
-.Po or no
-.Pa /etc/defaultdomain
-exists
-.Pc ,
-.Nm nfsmapid
-falls back on obtaining the domain name from the host name, if the host name
-contains a fully qualified domain name
-.Pq FQDN .
-.El
-.Pp
-If a domainname is still not obtained following all of the preceding steps,
-.Nm nfsmapid
-will have no domain configured.
-This results in the following behavior:
-.Bl -bullet
-.It
-Outbound
-.Qq owner
-and
-.Qq owner_group
-attribute strings are encoded as literal id's.
-For example, the UID 12345 is encoded as
-.Li 12345 .
-.It
-.Nm nfsmapid
-ignores the
-.Qq domain
-portion of the inbound attribute string and performs name service lookups only
-for the user or group.
-If the user/group exists in the local system name service databases, then the
-proper uid/gid will be mapped even when no domain has been configured.
-.Pp
-This behavior implies that the same administrative user/group domain exists
-between NFSv4 client and server (that is, the same uid/gid's for users/groups
-on both client and server).
-In the case of overlapping id spaces, the inbound attribute string could
-potentially be mapped to the wrong id.
-However, this is not functionally different from mapping the inbound string to
-.Sy nobody ,
-yet provides greater flexibility.
-.El
-.Sh ZONES
-NFS can be served out of a non-global zone.
-All of the above documentation applies to an in-zone NFS server.
-File sharing in zones is restricted to filesystems a zone completely controls.
-Some zone brands (see
-.Xr brands 5 )
-do not give the zone's root its own filesystem, for example.
-Delegated ZFS datasets to a zone are shareable, as well as lofs-remounted
-directories.
-The zone must have sys_nfs privileges; most brands grant this already.
-.Sh SEE ALSO
-.Xr lockd 1M ,
-.Xr mount_nfs 1M ,
-.Xr mountd 1M ,
-.Xr nfsd 1M ,
-.Xr nfsmapid 1M ,
-.Xr sharectl 1M ,
-.Xr brands 5 ,
-.Xr smf 5 ,
-.Xr zones 5