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, 29 insertions, 0 deletions

diff --git a/etc/rc.subr b/etc/rc.subr
index 1037bbc..9c6a158 100644
--- a/etc/rc.subr
+++ b/etc/rc.subr
@@ -1379,6 +1379,35 @@ ltr()
 	echo "${_out}"
 }
 
+# require_kld name
+#	Ensure given module is loaded.
+#	Try to load it if it's not.
+require_kld()
+{
+	local _name _line _ret
+
+	_name=$1
+	_me="require_kld"
+
+	_ret=`kldstat -v | while read _line; do
+		case ${_line} in
+		*" ${_name}")
+			echo "yes"
+			;;
+		*)
+			;;
+		esac;
+	done`
+
+	if [ -z "${_ret}" ]; then
+                if kldload ${_name}; then
+                        info "${_name} module loaded."
+                else
+                        err 1 "${_me}: ${_name} module failed to load."
+                fi
+        fi
+}
+
 # Creates a list of providers for GELI encryption.
 geli_make_list()
 {