90mdraid: fix/adjust 65-md* rules and related scripts

Reworked the flow of the rules file a bit, removed redundant tests, also
should be easier to follow. It's much shorter now as well, a bit more
similar to 90lvm script - both revolve around same concepts after all.

There's no reason to treat conf-assembled arrays differently from
incremental ones. Once we hit timeout in init's udev loop, we can use
common script (mdraid_start.sh) to try force inactive arrays
into degraded mode.

md-finished.sh was kind-of out of place - it didn't really wait for any
particular device(s) to show up, just watched if onetime mdadm scripts
are still in place. Furthermore, after moving mdraid_start to --timeout
initqueue, it didn't really have too much to watch at all, besides
mdadm_auto (and that served no purpose, as we do wait for concrete
devices).

Either way, with stock 64-md fixes, current version of 65-md*.rules does
the following:

- limits assembly to certain uuids, if specified
- watch for no ddf/imsm
- if mdadm.conf => setup onetime -As script, without forced --run option
- if !mdadm.conf => incrementally assemble
- for both cases, setup timeout script, run-forcing arrays as a last resort

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

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

@@ -2,68 +2,45 @@
 # automatically cause mdadm to be run.
 # See udev(8) for syntax
 
-ACTION!="add|change", GOTO="md_inc_end"
-SUBSYSTEM!="block", GOTO="md_inc_end"
-ENV{ID_FS_TYPE}!="*_raid_member", GOTO="md_inc_end"
+ACTION!="add|change", GOTO="md_end"
+SUBSYSTEM!="block", GOTO="md_end"
+ENV{rd_NO_MD}=="?*", GOTO="md_end"
+KERNEL=="md*", GOTO="md_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{ID_FS_TYPE}!="*_raid_member", GOTO="md_end"
+ENV{ID_FS_TYPE}=="isw_raid_member", ENV{rd_NO_MDIMSM}=="?*", GOTO="md_end"
+ENV{ID_FS_TYPE}=="ddf_raid_member", ENV{rd_NO_MDDDF}=="?*", GOTO="md_end"
 
-ENV{rd_NO_MD}=="?*", GOTO="md_inc_end"
+# already done ?
+PROGRAM="/bin/sh -c 'for i in $sys/$devpath/holders/md[0-9]*; do [ -e $$i ] && exit 0; done; exit 1;' ", \
+    GOTO="md_end"
 
-PROGRAM=="/bin/sh -c 'for i in $sys/$devpath/holders/md[0-9]*; do [ -e $$i ] && exit 0; done; exit 1;' ", \
-    GOTO="md_inc_end"
+# for native arrays - array's uuid has to be specified
+# for containers - container's uuid has to be specified
+# TODO : how to get embedded array's uuid having container's component ?
+#
+# UUID CHECK
 
 ENV{DEVTYPE}!="partition", \
     RUN+="/sbin/partx -d --nr 1-1024 $env{DEVNAME}"
 
-KERNEL!="md*", IMPORT{program}="/sbin/mdadm --examine --export $tempnode"
-
-# UUID CHECK
-
-LABEL="do_md_inc"
-
-#
-# if rd_MDADMCONF do not assemble incrementally
-# defer auto assembly until the udev queue is settled
-#
-ENV{rd_MDADMCONF}!="?*", GOTO="md_auto_end"
-
-RUN+="/sbin/initqueue --finished --unique --name md_finished /sbin/md_finished.sh"
-RUN+="/sbin/initqueue --settled --onetime --unique /sbin/mdadm_auto"
-
-GOTO="md_inc_end"
-
-LABEL="md_auto_end"
-
-#
-# Incrementally build the md array
-#
-RUN+="/sbin/mdadm -I $env{DEVNAME}"
-
-RUN+="/sbin/initqueue --finished --unique --name md_finished /sbin/md_finished.sh"
-
-LABEL="md_inc_end"
-
-#
-# Handle non-container raid arrays
-#
-ACTION=="add|change", \
-	KERNEL=="md[0-9]*|md/*", \
-	ENV{MD_LEVEL}!="container", \
-	ENV{MD_CONTAINER}!="?*", \
-        ENV{rd_MDADMCONF}!="?*", \
-        ENV{rd_NO_MD}!="?*", \
-	GOTO="do_raidstart"
-
-GOTO="end_raidstart"
-
-LABEL="do_raidstart"
-
-# check if array is not inactive anymore
-TEST=="md/array_state", ATTR{md/array_state}!="|inactive", GOTO="end_raidstart"
-
-RUN+="/sbin/initqueue --finished --unique --name md_finished /sbin/md_finished.sh"
 RUN+="/sbin/initqueue --timeout --onetime --unique /sbin/mdraid_start"
 
-LABEL="end_raidstart"
+# if rd_MDADMCONF is set, do not assemble incrementally;
+# defer conf-based assembly until the udev queue is settled
+#
+ENV{rd_MDADMCONF}!="?*", GOTO="md_incremental"
+
+RUN+="/sbin/initqueue --settled --onetime --unique /sbin/mdadm_auto"
+
+GOTO="md_end"
+
+#
+# Incrementally build the md array; this will automatically assemble
+# any eventual containers as well (imsm, ddf)
+#
+LABEL="md_incremental"
+
+RUN+="/sbin/mdadm -I $env{DEVNAME}"
+
+LABEL="md_end"

modules.d/90mdraid/md_finished.sh

@@ -1,9 +0,0 @@
-#!/bin/sh
-# -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
-# ex: ts=8 sw=4 sts=4 et filetype=sh
-for f in $hookdir/initqueue/settled/mdraid_start* $hookdir/initqueue/settled/mdadm_auto*; do
-    [ -e $f ] && exit 1
-done
-
-$UDEV_QUEUE_EMPTY >/dev/null 2>&1 || exit 1
-exit 0

modules.d/90mdraid/mdadm_auto.sh

@@ -4,4 +4,4 @@
 type getarg >/dev/null 2>&1 || . /lib/dracut-lib.sh
 
 info "Autoassembling MD Raid"
-mdadm -As --auto=yes --run 2>&1 | vinfo
+mdadm -As --auto=yes 2>&1 | vinfo

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

@@ -82,7 +82,6 @@ install() {
 
     inst "$moddir/mdraid_start.sh" /sbin/mdraid_start
     inst "$moddir/mdadm_auto.sh" /sbin/mdadm_auto
-    inst "$moddir/md_finished.sh" /sbin/md_finished.sh
     inst_hook pre-trigger 30 "$moddir/parse-md.sh"
     inst "$moddir/mdraid-cleanup.sh" /sbin/mdraid-cleanup
     inst_hook shutdown 30 "$moddir/md-shutdown.sh"

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

@@ -13,12 +13,14 @@ else
             [ -e "$f" ] || continue
             while read line; do
                 if [ "${line%%UUID CHECK}" != "$line" ]; then
+                    printf 'IMPORT{program}="/sbin/mdadm --examine --export $tempnode"\n'
                     for uuid in $MD_UUID; do
-                        printf 'ENV{MD_UUID}=="%s", GOTO="do_md_inc"\n' $uuid
+                        printf 'ENV{MD_UUID}=="%s", GOTO="md_uuid_ok"\n' $uuid
                     done;
-                    printf 'GOTO="md_inc_end"\n';
+                    printf 'GOTO="md_end"\n'
+                    printf 'LABEL="md_uuid_ok"\n'
                 else
-                    echo $line;
+                    echo "$line"
                 fi
             done < "${f}" > "${f}.new"
             mv "${f}.new" "$f"