90(md|dm)raid: recognize ddf container

This patch adds ddf support, consistently with imsm/isw options.

Signed-off-by: Michal Soltys <soltys@ziu.info>

dracut.kernel.7.xml

@@ -342,6 +342,12 @@ This parameter can be specified multiple times.</para>
             <para>disable MD RAID for imsm/isw raids, use DM RAID instead</para>
           </listitem>
         </varlistentry>
+        <varlistentry>
+          <term><envar>rd.md.ddf</envar>=0</term>
+          <listitem>
+            <para>disable MD RAID for SNIA ddf raids, use DM RAID instead</para>
+          </listitem>
+        </varlistentry>
         <varlistentry>
           <term>
             <envar>rd.md.conf</envar>=0

modules.d/90dmraid/61-dmraid-imsm.rules

@@ -10,6 +10,7 @@ ENV{ID_FS_TYPE}=="linux_raid_member", GOTO="dm_end"
 ENV{ID_FS_TYPE}!="*_raid_member", , GOTO="dm_end"
 
 ENV{ID_FS_TYPE}=="isw_raid_member", ENV{rd_NO_MDIMSM}!="?*", GOTO="dm_end"
+ENV{ID_FS_TYPE}=="ddf_raid_member", ENV{rd_NO_MDDDF}!="?*", GOTO="dm_end"
 
 ENV{rd_NO_DM}=="?*", GOTO="dm_end"
 

modules.d/90dmraid/parse-dm.sh

@@ -12,3 +12,7 @@ if  ! command -v mdadm >/dev/null || ! getargbool 1 rd.md.imsm -n rd_NO_MDIMSM |
     udevproperty rd_NO_MDIMSM=1
 fi
 
+if  ! command -v mdadm >/dev/null || ! getargbool 1 rd.md.ddf -n rd_NO_MDDDF || getarg noddfmd; then
+    info "rd.md.ddf=0: no MD RAID for SNIA ddf raids"
+    udevproperty rd_NO_MDDDF=1
+fi

modules.d/90mdraid/65-md-incremental-imsm.rules

@@ -4,9 +4,10 @@
 
 ACTION!="add|change", GOTO="md_inc_end"
 SUBSYSTEM!="block", GOTO="md_inc_end"
-ENV{ID_FS_TYPE}!="linux_raid_member|isw_raid_member", GOTO="md_inc_end"
+ENV{ID_FS_TYPE}!="*_raid_member", GOTO="md_inc_end"
 
 ENV{ID_FS_TYPE}=="isw_raid_member", ENV{rd_NO_MDIMSM}=="?*", GOTO="md_inc_end"
+ENV{ID_FS_TYPE}=="ddf_raid_member", ENV{rd_NO_MDDDF}=="?*", GOTO="md_inc_end"
 
 ENV{rd_NO_MD}=="?*", GOTO="md_inc_end"
 

modules.d/90mdraid/md-noddf.sh

@@ -0,0 +1,5 @@
+#!/bin/sh
+# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
+# ex: ts=8 sw=4 sts=4 et filetype=sh
+info "rd.md.ddf=0: no MD RAID for SNIA ddf raids"
+udevproperty rd_NO_MDDDF=1

modules.d/90mdraid/md-noimsm.sh

@@ -2,4 +2,4 @@
 # -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
 # ex: ts=8 sw=4 sts=4 et filetype=sh
 info "rd.md.imsm=0: no MD RAID for imsm/isw raids"
-udevproperty rd_NO_MDIMSM=1
+udevproperty rd_NO_MDIMSM=1

modules.d/90mdraid/module-setup.sh

@@ -20,7 +20,7 @@ check() {
             check_block_and_slaves is_mdraid "$_rootdev" || return 1
         else
             # root is not on a block device, use the shotgun approach
-            blkid | egrep -q '(linux|isw)_raid' || return 1
+            blkid | grep -q '"[^"]*_raid_member"' || return 1
         fi
     }
 
@@ -59,9 +59,13 @@ install() {
 
     inst_rules "$moddir/65-md-incremental-imsm.rules"
 
+    # guard against pre-3.0 mdadm versions, that can't handle containers
     if ! mdadm -Q -e imsm /dev/null &> /dev/null; then
         inst_hook pre-trigger 30 "$moddir/md-noimsm.sh"
     fi
+    if ! mdadm -Q -e ddf /dev/null &> /dev/null; then
+        inst_hook pre-trigger 30 "$moddir/md-noddf.sh"
+    fi
 
     if [[ $hostonly ]] || [[ $mdadmconf = "yes" ]]; then
         if [ -f /etc/mdadm.conf ]; then

modules.d/90mdraid/parse-md.sh

@@ -43,3 +43,9 @@ if ! getargbool 1 rd.md.imsm -n rd_NO_MDIMSM || getarg noiswmd || getarg nodmrai
     info "no MD RAID for imsm/isw raids"
     udevproperty rd_NO_MDIMSM=1
 fi
+
+# same thing with ddf containers
+if ! getargbool 1 rd.md.ddf -n rd_NO_MDDDF || getarg noddfmd || getarg nodmraid; then
+    info "no MD RAID for SNIA ddf raids"
+    udevproperty rd_NO_MDDDF=1
+fi