NAME
mountd, rpc.mountd — server for NFS mount requests and NFS access checks
SYNOPSIS
/usr/sbin/rpc.mountd
[-r]
[-t
n]
[-v]
DESCRIPTION
mountd
is an RPC server that answers requests for NFS
access information and file system mount requests.
It reads the
/etc/dfs/sharetab
file to determine which file systems are available for mounting by which
remote machines.
See
sharetab(4).
nfsd
running on the local server
will contact
mountd
the first time an NFS client tries to access the file system
to determine whether the client should get read-write, read-only, or no access.
This access can be dependent on the security mode used in the
remote procedure call from the client.
See
share_nfs(1M).
The command also provides information as to what file systems are
mounted by which clients.
This information can be printed using the
showmount(1M)
command.
The
mountd
daemon is automatically invoked if
NFS_CORE=1,
NFS_SERVER=1,
and
START_MOUNTD=1
in
/etc/rc.config.d/nfsconf.
Only superuser can run the
mountd
daemon.
Options
The following options are supported:
- -l log_file
This is an obsolete option. All messages and errors are logged to
/var/nfs/mountd.log.
- -r
Reject mount requests from clients. Clients that have file systems
mounted will not be affected.
- -tn
Specify tracing level
n,
where
n
can have one of the following values:
- 1
Errors only (default).
- 2
Errors, requests handled by mountd, results, and the names of the
main functions leading to the result
- -v
Run the command in verbose mode. Each time
mountd
determines what access a client should get, it will log the result
to the
syslog,
as well as the names of the main functions leading to the result.
WARNINGS
If
nfsd
is running,
mountd
must also be running in order to be assured that the NFS
server can respond to requests.
Some routines that compare hostnames use case-sensitive string comparisons;
some do not.
If an incoming request fails, verify that the case of the hostname in
the file to be parsed matches the case of the hostname called for,
and attempt the request again.
If a client crashes, executing
showmount
on the server will show
that the client still has a file system mounted.
In other words, stale entries may accumulate in
/etc/rmtab
for clients that crash without sending an unmount request.
Also, if a client mounts the same remote directory twice,
only one entry appears in
/etc/rmtab.
Doing a
umount
of one of these directories removes the single entry and
showmount
no longer indicates that the remote directory is mounted.
AUTHOR
mountd
was developed by Sun Microsystems, Inc.
FILES
- /etc/dfs/sharetab
shared file system table
- /etc/rmtab
list of all hosts having file systems mounted from this machine
- /var/nfs/mountd.log
rpc.mountd log file for messages and errors
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