Author: glen
Date: Mon Mar 23 01:18:31 2009
New Revision: 10231
Added:
geninitrd/trunk/mod-md.sh
Log:
- modularize mdadm
Added: geninitrd/trunk/mod-md.sh
==============================================================================
--- (empty file)
+++ geninitrd/trunk/mod-md.sh Mon Mar 23 01:18:31 2009
@@ -0,0 +1,169 @@
+#!/bin/sh
+#
+# geninitrd mod: mdadm
+
+# if we should init md (softraid) at boot
+have_md=no
+
+# disable if tools not installed
+if [ -x /sbin/mdadm ]; then
+ USE_MD=yes
+else
+ USE_MD=no
+fi
+
+USEMDADMSTATIC=no
+# XXX wtf is this for?
+USERAIDSTART=yes
+
+# return true if mdadm is set on $devpath
+# @param string $devpath device node to be examined
+# @access public
+is_md() {
+ local devpath="$1"
+
+ # mdadm disabled
+ if ! is_yes "$USE_MD"; then
+ return 1
+ fi
+
+ if [[ "$devpath" == /dev/md* ]]; then
+ return 0
+ fi
+
+ return 1
+}
+
+# find md modules for $devpath
+# @param $devpath device to be examined
+# @return false if $devpath is not on md
+# @access public
+find_modules_md() {
+ local found raidlevel
+
+ if [ -f /etc/mdadm.conf ]; then
+ debug "Finding RAID details using mdadm for rootdev=$1"
+ eval `(/sbin/mdadm -v --examine --scan
--config=/etc/mdadm.conf;/sbin/mdadm -v --detail --scan
--config=/etc/mdadm.conf) | awk -v rootdev="$1" '
+ BEGIN {
+ found = "no";
+ dev_list = "";
+ raidlevel = ""
+ rootdev_devfs = rootdev;
+ if (rootdev ~ /\/dev\/md\/[0-9]/) {
+ gsub(/\/dev\/md\//,"/dev/md",rootdev_devfs);
+ }
+ }
+
+ /^ARRAY/ {
+ if (($2 == rootdev) || ($2 == rootdev_devfs)) {
+ raidlevel=$3;
+ gsub(/level=/,NUL,raidlevel);
+ if (raidlevel ~ /^raid([0-6]|10)/) {
+ gsub(/raid/,NUL,raidlevel);
+ };
+ found="yes";
+ getline x;
+ if (x ~ /devices=/) {
+ dev_list = x;
+ gsub(".*devices=", NUL, dev_list);
+ gsub(",", " ", dev_list);
+ }
+ }
+ }
+
+ END {
+ print "have_md=" found;
+ print "raidlevel=" raidlevel;
+ print "dev_list=\"" dev_list "\"";
+ }'`
+ fi
+
+ if [ "$have_md" != "yes" -a -f /etc/raidtab ]; then
+ die "raidtools are not longer supported. Please migrate to
mdadm setup!"
+ fi
+
+ if is_yes "$have_md"; then
+ case "$raidlevel" in
+ [01]|10)
+ find_module "raid$raidlevel"
+ ;;
+ [456])
+ find_module "-raid$raidlevel"
+ find_module "-raid456"
+ ;;
+ linear)
+ find_module "linear"
+ ;;
+ *)
+ warn "raid level $number (in mdadm config) not
recognized"
+ ;;
+ esac
+ else
+ die "RAID devices not found for \"$1\", check your
configuration!"
+ fi
+
+ rootdev_nr=$(( $rootdev_nr + 1 ))
+ eval "rootdev${rootdev_nr}=\"$1\""
+ eval "dev_list${rootdev_nr}=\"${dev_list}\""
+
+ for device in $dev_list; do
+ find_modules_for_devpath $device
+ done
+}
+
+
+# generate initrd fragment for md
+# @access public
+initrd_gen_md() {
+ debug "Setting up mdadm..."
+
+ if [ ! -x /sbin/mdadm -o ! -x /sbin/initrd-mdassemble ]; then
+ die "/sbin/mdadm or /sbin/initrd-mdassemble is missing!"
+ fi
+
+ inst_exec /sbin/initrd-mdassemble /bin/mdassemble
+
+ # LVM on RAID case
+ dev_list_extra=$(awk '/^DEVICE / { for (i=2; i<=NF; i++) { printf "%s
", $i; }; } ' /etc/mdadm.conf | xargs)
+ if [ "$dev_list_extra" = "partitions" ]; then
+ # FIXME: handle this case (see man mdadm.conf)
+ echo "DEVICE partitions" >> "$DESTDIR/etc/mdadm.conf"
+ dev_list_extra=""
+ else
+ for ex_dev in $dev_list_extra; do
+ echo "DEVICE $ex_dev" >> "$DESTDIR/etc/mdadm.conf"
+ done
+ fi
+ do_md0=1
+ for nr in `seq 1 $rootdev_nr`; do
+ eval cr_rootdev="\$rootdev${nr}"
+ eval cr_dev_list="\$dev_list${nr}"
+ debug echo "Setting up array ($cr_rootdev = $cr_dev_list)"
+
+ [ "$cr_rootdev" = "/dev/md0" ] && do_md0=0
+
+ echo "DEVICE $cr_dev_list" >> "$DESTDIR/etc/mdadm.conf"
+ cr_dev_list_md="$(echo "$cr_dev_list" | xargs | awk ' { gsub(/
+/,",",$0); print $0; }')"
+ cr_md_conf=$(/sbin/mdadm --detail --brief
--config=/etc/mdadm.conf $cr_rootdev | awk ' { gsub(/spares=[0-9]+/, "", $0);
print $0; }')
+ if [ -n "$cr_md_conf" ]; then
+ echo "$cr_md_conf" >> "$DESTDIR/etc/mdadm.conf"
+ else
+ echo "ARRAY $cr_rootdev devices=$cr_dev_list_md" >>
"$DESTDIR/etc/mdadm.conf"
+ fi
+
+ for f in $cr_dev_list $cr_rootdev $dev_list_extra; do
+ # mkdir in case of devfs name
+ inst_d $(dirname $f)
+ [ -e "$DESTDIR/$f" ] && continue
+ # this works fine with and without devfs
+ inst $f $f
+ done
+ done
+
+ echo "mdassemble" | add_linuxrc
+
+ # needed to determine md-version
+ if [ "$do_md0" -eq 1 ]; then
+ mknod $DESTDIR/dev/md0 b 9 0
+ fi
+}
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