Add two new scripts (mdconfig/mdconfig2) to replace old ramdisk{,-own}

scripts. These scripts handle vnode backed md(4) devices.

Old ramdisk{,-own} scripts will stay a bit in CVS to allow some time for
migration since variable names have changed (ramdisk_* -> mdconfig_*).

Two new variables have been introduced to be able to populate the md(4)
device once it has been mounted (mdconfig_*_files and mdconfig_*_cmd).

Use should be as easy as:

mdconfig_md0="-t malloc -s 10m"
mdconfig_md1="-t vnode -f /var/foo.img"

See rc.conf(5) for more information and description of the additional
variables.

Approved by:	cperciva

1 files changed, 195 insertions, 0 deletions

diff --git a/etc/rc.d/mdconfig b/etc/rc.d/mdconfig
new file mode 100644
index 0000000..8ee3b2a
--- /dev/null
+++ b/etc/rc.d/mdconfig
@@ -0,0 +1,195 @@
+#!/bin/sh
+#
+# Copyright (c) 2006  The FreeBSD Project
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+# $FreeBSD$
+#
+
+# PROVIDE: mdconfig
+# REQUIRE: localswap
+# BEFORE: mountcritlocal
+
+. /etc/rc.subr
+
+name="mdconfig"
+stop_cmd="mdconfig_stop"
+start_cmd="mdconfig_start"
+
+is_readonly()
+{
+	local _mp _ret
+
+	_mp=$1
+	_ret=`mount | while read _line; do
+		case ${_line} in
+		*" ${_mp} "*read-only*)
+			echo "yes"
+			;;
+		
+		*)
+			;;
+		esac;
+	done`
+
+	if [ -n "${_ret}" ]; then
+		return 0
+	else
+		return 1
+	fi
+}
+
+init_variables()
+{
+	local _i
+
+	_fs=""
+	_mp=""
+	_dev="/dev/${_md}"
+	eval _config=\$mdconfig_${_md}
+	eval _newfs=\$mdconfig_${_md}_newfs
+
+	_type=${_config##*-t\ }
+	_type=${_type%%\ *}
+	if [ -z "${_type}" ]; then
+		err 1 "You need to specify \"-t <type>\" in mdconfig_${_md}"
+	fi
+
+	if [ "${_type}" = "vnode" ]; then
+		_file=${_config##*-f\ }
+		_file=${_file%%\ *}
+		if [ -z "${_file}" ]; then
+			err 2 "You need to specify \"-f <file>\" in mdconfig_${_md} for vnode devices"
+		fi
+		if [ "${_file}" != "${_file%.uzip}" ]; then
+			# Load geom_uzip kernel module if needed
+			require_kld geom_uzip
+			_dev="/dev/${_md}.uzip"
+		fi
+		for _i in `df ${_file} 2>/dev/null`; do _fs=${_i}; done
+	fi
+
+	# Debugging help.
+	debug "${_md} config: ${_config}"
+	debug "${_md} type: ${_type}"
+	debug "${_md} dev: ${_dev}"
+	debug "${_md} file: ${_file}"
+	debug "${_md} fs: ${_fs}"
+	debug "${_md} newfs flags: ${_newfs}"
+}
+
+mdconfig_start()
+{
+	local _md _mp _config _type _dev _file _fs _newfs _fsck_cmd
+
+	require_kld g_md
+
+	for _md in ${_mdconfig_list}; do
+		init_variables ${_md}
+		# Create md(4) devices of types swap, malloc and vnode if the
+		# file is on the root partition.
+		if [ "${_type}" != "vnode" -o "${_fs}" = "/" ]; then
+			if [ "${_type}" = "vnode" ]; then
+				if is_readonly ${_fs}; then
+					warn "${_fs} is mounted read-only, skipping ${_md}."
+					continue
+				fi
+			fi
+			if mdconfig -l -u ${_md} >/dev/null 2>&1; then
+				err 3 "${_md} already exists"
+			fi
+			echo "Creating ${_md} device (${_type})."
+			if ! mdconfig -a ${_config} -u ${_md}; then
+				echo "Creating ${_md} device failed, moving on."
+				continue
+			fi
+			# Skip fsck for uzip devices.
+			if [ "${_type}" = "vnode" ]; then
+				if [ "${_file}" != "${_file%.uzip}" ]; then
+					_fsck_cmd=":"
+				elif checkyesno background_fsck; then
+					_fsck_cmd="fsck -F"
+				else
+					_fsck_cmd="fsck"
+				fi
+				if ! eval ${_fsck_cmd} -p ${_dev} >/dev/null; then
+					echo "Fsck failed on ${_dev}, not mounting the filesystem."
+					continue
+					
+				fi
+			else
+				newfs ${_newfs} ${_dev} >/dev/null
+			fi
+			if mount -d ${_dev} 2>&1 >/dev/null; then
+				echo "Mounting ${_dev}."
+				mount ${_dev}
+			fi
+		fi
+	done
+}
+
+mdconfig_stop()
+{
+	local _md _mp _config _type _dev _file _fs _newfs _i
+
+	for _md in ${_mdconfig_list}; do
+		init_variables ${_md}
+		if [ "${_type}" != "vnode" -o "${_fs}" = "/" ]; then
+			for _i in `df ${_dev} 2>/dev/null`; do _mp=${_i}; done
+			if [ -z "${_mp}" -o "${_mp}" != "${_mp%%%}" ]; then
+				echo "Device ${_dev} isn't mounted."
+			else
+				echo "Umounting ${_dev}."
+				umount ${_dev}
+			fi
+			if mdconfig -l -u ${_md} >/dev/null 2>&1; then
+				echo "Destroying ${_md}."
+				mdconfig -d -u ${_md}
+			fi
+		fi
+	done
+}
+
+_mdconfig_cmd="$1"
+if [ $# -gt 0 ]; then
+        shift
+fi
+[ -n "$*" ] && _mdconfig_list="$*"
+
+load_rc_config $name
+
+_mdconfig_unit=0
+if [ -z "${_mdconfig_list}" ]; then
+	while :; do
+		eval _mdconfig_config=\$mdconfig_md${_mdconfig_unit}
+		if [ -z "${_mdconfig_config}" ]; then
+			break
+		else
+			_mdconfig_list="${_mdconfig_list}${_mdconfig_list:+ }md${_mdconfig_unit}"
+			_mdconfig_unit=$((${_mdconfig_unit} + 1))
+		fi
+	done
+fi
+	
+run_rc_command "${_mdconfig_cmd}"