144 lines
4.5 KiB
Groff
144 lines
4.5 KiB
Groff
.\" Copyright (c) 1989, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)mountd.8 8.4 (Berkeley) 4/28/95
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.\" $Id: mountd.8,v 1.9 1997/04/09 20:25:43 guido Exp $
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.\"
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.Dd April 28, 1995
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.Dt MOUNTD 8
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.Os
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.Sh NAME
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.Nm mountd
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.Nd service remote
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.Tn NFS
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mount requests
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.Sh SYNOPSIS
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.Nm /sbin/mountd
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.Op Fl 2nr
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.Op Ar exportsfile
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.Sh DESCRIPTION
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.Xr Mountd
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is the server for
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.Tn NFS
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mount requests from other client machines.
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.Xr Mountd
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listens for service requests at the port indicated in the
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.Tn NFS
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server specification; see
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.%T "Network File System Protocol Specification" ,
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RFC1094, Appendix A and
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.%T "NFS: Network File System Version 3 Protocol Specification" ,
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Appendix I.
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.Pp
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Options and operands available for
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.Nm mountd :
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.Bl -tag -width Ds
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.It Fl 2
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The
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.Fl 2
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option allows the administrator to force clients to use only the
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version 2 NFS protocol to mount filesystems from this server.
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.It Fl n
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The
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.Fl n
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option allows non-root mount requests to be served.
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This should only be specified if there are clients such as PC's,
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that require it.
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It will automatically clear the vfs.nfs.nfs_privport sysctl flag, which
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controls if the kernel will accept nfs requests form reserved ports only.
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.It Fl r
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The
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.Fl r
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option allows mount RPCs requests for regular files to be served.
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Although this seems to violate the mount protocol specification,
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some diskless workstations do mount requests for
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their swapfiles and expect them to be regular files.
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Since a regular file cannot be specified in
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.Pa /etc/exports ,
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the entire file system in which the swapfiles resides
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will have to be exported with the
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.Fl alldirs
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flag.
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.It Ar exportsfile
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The
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.Ar exportsfile
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argument specifies an alternate location
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for the exports file.
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.El
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.Pp
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When mountd is started,
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it loads the export host addresses and options into the kernel
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using the mount(2) system call.
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After changing the exports file,
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a hangup signal should be sent to the mountd daemon
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to get it to reload the export information.
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After sending the SIGHUP
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(kill \-s HUP `cat /var/run/mountd.pid`),
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check the syslog output to see if mountd logged any parsing
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errors in the exports file.
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.Pp
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If
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.Nm mountd
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detects that the running kernel does not include
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.Tn NFS
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support, it will attempt to load a loadable kernel module containing
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.Tn NFS
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code, using
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.Xr modload 8
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by way of
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.Xr vfsload 3 .
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If this fails, or no
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.Tn NFS
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LKM was available,
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.Nm mountd
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exits with an error.
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.Sh FILES
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.Bl -tag -width /var/run/mountd.pid -compact
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.It Pa /etc/exports
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the list of exported filesystems
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.It Pa /var/run/mountd.pid
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the pid of the currently running mountd
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.It Pa /var/db/mountdtab
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the current list of remote mounted filesystems
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.El
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.Sh SEE ALSO
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.Xr nfsstat 1 ,
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.Xr exports 5 ,
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.Xr modload 8 ,
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.Xr nfsd 8 ,
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.Xr portmap 8 ,
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.Xr showmount 8
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.Sh HISTORY
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The
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.Nm mountd
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utility first appeared in
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.Bx 4.4 .
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