1.\" Copyright (c) 1989, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 4. Neither the name of the University nor the names of its contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.\" @(#)mountd.8 8.4 (Berkeley) 4/28/95 29.\" $FreeBSD$ 30.\" 31.Dd April 28, 1995 32.Dt MOUNTD 8 33.Os 34.Sh NAME 35.Nm mountd 36.Nd service remote 37.Tn NFS 38mount requests 39.Sh SYNOPSIS 40.Nm 41.Op Fl 2dlnr 42.Op Fl p Ar port 43.Op Ar exportsfile 44.Sh DESCRIPTION 45The 46.Nm 47utility is the server for 48.Tn NFS 49mount requests from other client machines. 50It listens for service requests at the port indicated in the 51.Tn NFS 52server specification; see 53.%T "Network File System Protocol Specification" , 54RFC1094, Appendix A and 55.%T "NFS: Network File System Version 3 Protocol Specification" , 56Appendix I. 57.Pp 58The following options are available: 59.Bl -tag -width indent 60.It Fl 2 61Allow the administrator to force clients to use only the 62version 2 63.Tn NFS 64protocol to mount file systems from this server. 65.It Fl d 66Output debugging information. 67.It Fl l 68Cause all succeeded 69.Nm 70requests to be logged. 71.It Fl n 72Allow non-root mount requests to be served. 73This should only be specified if there are clients such as PC's, 74that require it. 75It will automatically clear the vfs.nfsrv.nfs_privport sysctl flag, which 76controls if the kernel will accept NFS requests from reserved ports only. 77.It Fl p Ar port 78Force 79.Nm 80to bind to the specified port, for both 81.Dv AF_INET 82and 83.Dv AF_INET6 84address families. 85This is typically done to ensure that the port which 86.Nm 87binds to is a known quantity which can be used in firewall rulesets. 88If 89.Nm 90cannot bind to this port, an appropriate error will be recorded in 91the system log, and the daemon will then exit. 92.It Fl r 93Allow mount RPCs requests for regular files to be served. 94Although this seems to violate the mount protocol specification, 95some diskless workstations do mount requests for 96their swapfiles and expect them to be regular files. 97Since a regular file cannot be specified in 98.Pa /etc/exports , 99the entire file system in which the swapfiles resides 100will have to be exported with the 101.Fl alldirs 102flag. 103.It Ar exportsfile 104Specify an alternate location 105for the exports file. 106.El 107.Pp 108When 109.Nm 110is started, 111it loads the export host addresses and options into the kernel 112using the 113.Xr mount 2 114system call. 115After changing the exports file, 116a hangup signal should be sent to the 117.Nm 118daemon 119to get it to reload the export information. 120After sending the SIGHUP 121(kill \-s HUP `cat /var/run/mountd.pid`), 122check the syslog output to see if 123.Nm 124logged any parsing 125errors in the exports file. 126.Pp 127If 128.Nm 129detects that the running kernel does not include 130.Tn NFS 131support, it will attempt to load a loadable kernel module containing 132.Tn NFS 133code, using 134.Xr kldload 2 . 135If this fails, or no 136.Tn NFS 137KLD was available, 138.Nm 139exits with an error. 140.Sh FILES 141.Bl -tag -width /var/run/mountd.pid -compact 142.It Pa /etc/exports 143the list of exported file systems 144.It Pa /var/run/mountd.pid 145the pid of the currently running mountd 146.It Pa /var/db/mountdtab 147the current list of remote mounted file systems 148.El 149.Sh SEE ALSO 150.Xr nfsstat 1 , 151.Xr kldload 2 , 152.Xr exports 5 , 153.Xr nfsd 8 , 154.Xr rpcbind 8 , 155.Xr showmount 8 156.Sh HISTORY 157The 158.Nm 159utility first appeared in 160.Bx 4.4 . 161