* If mdadm is being configured in a chroot, it now defaults to starting all

    arrays from the initial ramdisk, rather than trying to figure out the root
    MD array (we're using /proc information, so it would be the one of the host, not the one of the chroot) (closes: #386468).

1 files changed, 21 insertions, 9 deletions

diff --git a/debian/mdadm.config b/debian/mdadm.config
index 6a59ef1d..9fdde4dc 100644
--- a/debian/mdadm.config
+++ b/debian/mdadm.config
@@ -50,19 +50,31 @@ if [ -s $DEBIANCONFIG ] ; then
   [ -n "$MAILADDR" ] && db_set mdadm/mail_to "$MAILADDR"
 fi
 
-db_fget mdadm/initrdstart seen
-if [ -z "$INITRDSTART" ] || [ "$RET $INITRDSTART" = "false all" ]; then
+chrooted() {
+  test ! -r /proc/1/root
+}
+
+get_root_raiddev() {
+  local rootraiddev;
   rootraiddev="$(df / | sed -rne 's,^(/dev/[^[:space:]]+).*,\1,p')"
   if ! mdadm --detail $rootraiddev >/dev/null 2>&1; then
-    # you are using some funky setup. Let's be save...
-    # (could also happen during preconfigure, when no mdadm present)
-    INITRDSTART=all
-  else
-    # remove partition from partitionable array
-    INITRDSTART="${rootraiddev%p[0-9]*}"
+    return 1
   fi
-fi
+  echo ${rootraiddev%p[0-9]*}
+  return 0
+}
+
+get_initrdstart() {
+  db_fget mdadm/initrdstart seen
+  if chrooted || [ "$RET $INITRDSTART" = "false all" ]; then
+    echo all
+    return 1
+  fi
+
+  get_root_raiddev || echo all
+}
 
+[ -z "$INITRDSTART" ] && INITRDSTART="$(get_initrdstart)"
 [ -n "$INITRDSTART" ] && db_set mdadm/initrdstart "$INITRDSTART"
 
 db_capb escape