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Date:      Thu, 28 May 2009 16:47:09 -0400 (EDT)
From:      Rick Macklem <rick@snowhite.cis.uoguelph.ca>
To:        rc@freebsd.org
Cc:        rwatson@freebsd.org, kib@freebsd.org
Subject:   rc scripts for the new experimental nfs subsystem
Message-ID:  <200905282047.QAA12312@snowhite.cis.uoguelph.ca>
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Hi,

I've just put the sources and man pages for an experimental alternative
to the regular NFS subsystem in FreeBSD-CURRENT. I have some rc scripts
that I use to run it, but I'm not much of a shell programmer, so I
wondered if someone might be able to review them?

Thanks in advance for any help, rick

Essentially, if nfsv4_serversupport_enable is yes, the "-e" argument must
be added to the argument list for nfsd and mountd, so that they run the
experimental server. (The current versions of these functions are the only
ones that know "-e" and they also know to load the correct modules, so I
don't think the business of running "nfsserver" to get the module loaded
is necessary for this case.) It also forces the startup of nfsuserd.

nfsuserd is used by both client and server and nfscbd is optionally used
by the client, for callback handling. They know to load the correct modules,
as required.

I've added the following variables to /etc/defaults/rc.conf:
nfsv4_serversupport_enable="NO"	# Enable support for NFSv4
nfsv4_cbd_enable="NO"		# NFSv4 client side callback daemon
nfsv4_cbd_flags=""		# Flags for nfscbd
nfsv4_userd_enable="NO"		# NFSv4 user/group name mapping daemon
nfsv4_userd_flags=""		# Flags for nfsuserd

and then there are 2 modified scripts for /etc/rc.d and two new ones.
A modified nfsd:
#!/bin/sh
#
# $FreeBSD: src/etc/rc.d/nfsd,v 1.16 2008/11/03 10:38:00 dfr Exp $
#

# PROVIDE: nfsd
# REQUIRE: mountd hostname gssd
# KEYWORD: nojail shutdown

. /etc/rc.subr

name="nfsd"
rcvar=`set_rcvar nfs_server`
command="/usr/sbin/${name}"

load_rc_config $name
start_precmd="nfsd_precmd"
sig_stop="USR1"

nfsd_precmd()
{
	# If nfsv4_serversupport_enable is yes, force use of the experimental
	# server
	#
	if checkyesno nfsv4_serversupport_enable; then
		rc_flags="-e ${nfs_server_flags}"
	else
		rc_flags="${nfs_server_flags}"
	fi

	if checkyesno nfsv4_serversupport_enable; then
		if ! checkyesno nfsv4_userd_enable  && \
		    ! /etc/rc.d/nfsuserd forcestatus 1>/dev/null 2>&1
		then
			force_depend nfsuserd || return 1
		fi
	elif ! sysctl vfs.nfsrv >/dev/null 2>&1; then
		force_depend nfsserver || return 1
	fi

	if ! checkyesno rpcbind_enable  && \
	    ! /etc/rc.d/rpcbind forcestatus 1>/dev/null 2>&1
	then
		force_depend rpcbind || return 1
	fi

	if ! checkyesno mountd_enable  && \
	    ! /etc/rc.d/mountd forcestatus 1>/dev/null 2>&1
	then
		force_depend mountd || return 1
	fi

	if ! checkyesno nfsv4_serversupport_enable  && \
	    checkyesno nfs_reserved_port_only; then
		echo 'NFS on reserved port only=YES'
		sysctl vfs.nfsrv.nfs_privport=1 > /dev/null
	fi
	return 0
}

run_rc_command "$1"

A modified mountd:
#!/bin/sh
#
# $FreeBSD: src/etc/rc.d/mountd,v 1.21 2008/07/16 19:50:29 dougb Exp $
#

# PROVIDE: mountd
# REQUIRE: NETWORKING nfsserver rpcbind quota
# KEYWORD: nojail shutdown

. /etc/rc.subr

name="mountd"
rcvar=`set_rcvar`
command="/usr/sbin/${name}"
pidfile="/var/run/${name}.pid"
required_files="/etc/exports"
start_precmd="mountd_precmd"
extra_commands="reload"

mountd_precmd()
{
	if ! checkyesno rpcbind_enable  && \
	    ! /etc/rc.d/rpcbind forcestatus 1>/dev/null 2>&1
	then
		force_depend rpcbind || return 1
	fi

	# mountd flags will differ depending on rc.conf settings
	#
	if checkyesno nfs_server_enable ; then
		if checkyesno weak_mountd_authentication; then
			rc_flags="${mountd_flags} -n"
		fi
	else
		if checkyesno mountd_enable; then
			checkyesno weak_mountd_authentication && rc_flags="-n"
		fi
	fi

	# If nfsv4_serversupport_enable is yes, force use of the experimental
	# server
	#
	if checkyesno nfsv4_serversupport_enable; then
		rc_flags="-e ${rc_flags}"
	fi

	if checkyesno zfs_enable; then
		rc_flags="${rc_flags} /etc/exports /etc/zfs/exports"
	fi

	rm -f /var/db/mountdtab
	( umask 022 ; > /var/db/mountdtab )
	return 0
}

load_rc_config $name
run_rc_command "$1"

A new script for the nfsuserd:
#!/bin/sh
#
# $FreeBSD$
#

# PROVIDE: nfsuserd
# KEYWORD: nojail

. /etc/rc.subr

name="nfsuserd"
rcvar="nfsv4_userd_enable"
command="/usr/sbin/${name}"

load_rc_config $name
command_args="${nfsv4_userd_flags}"
sig_stop="USR1"

run_rc_command "$1"

and a new script for the nfscbd:
#!/bin/sh
#
# $FreeBSD$
#

# PROVIDE: nfscbd
# KEYWORD: nojail

. /etc/rc.subr

name="nfscbd"
rcvar="nfsv4_cbd_enable"
command="/usr/sbin/${name}"

load_rc_config $name
command_args="${nfsv4_cbd_flags}"
sig_stop="USR1"

run_rc_command "$1"

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