From 2b5f73c47a2193f0759747401698e03a870d7a14 Mon Sep 17 00:00:00 2001
From: Erich Eckner <git@eckner.net>
Date: Fri, 28 Dec 2018 10:43:50 +0100
Subject: cryptfs.bin.in: understand mdadm.conf, too

---
 cryptfs.bin.in | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 54 insertions(+), 8 deletions(-)

diff --git a/cryptfs.bin.in b/cryptfs.bin.in
index 1930ec5..fd172cd 100644
--- a/cryptfs.bin.in
+++ b/cryptfs.bin.in
@@ -75,6 +75,12 @@ mountorder_to_device() {
     cut -d' ' -f1
 }
 
+raid_device_to_disk() {
+  printf '%s\n' "${mdadm_conf}" | \
+    grep -F " $1 " | \
+    cut -d' ' -f1
+}
+
 crypttab=$(
   sed '
     s|^\s*#CONF_PREFIXES#\s*||
@@ -103,6 +109,22 @@ fstab=$(
       s/ $//
     '
 )
+mdadm_conf=$(
+  sed '
+    s|^\s*#CONF_PREFIXES#\s*||
+    /^\s*#/d
+  ' #ETCDIR#/mdadm.conf | \
+    sed -n '
+      /^ARRAY / {
+        N
+        s,^ARRAY \(\S\+\) [^\n]\+\n\s*devices=\(\S\+\)$,\1 \2 ,
+        y/,/ /
+        s|UUID=|#UUIDDIR#/|
+        p
+      }
+    ' | \
+    sort -u
+)
 
 mount_details() {
   printf '%s\n' "${fstab}" | \
@@ -245,6 +267,14 @@ do_crypt_open() {
   fi
 }
 
+do_mdadm_stop() {
+  device="$1"
+  if mdadm --detail "${device}" | \
+    grep -q '^\s*State : \(active\|clean\)\s*$'; then
+    mdadm --stop "${device}"
+  fi
+}
+
 printf '%s\n' "${crypttab}" | \
   grep -vxF '' | \
   while read -r name raw key; do
@@ -257,17 +287,33 @@ printf '%s\n' "${crypttab}" | \
       unset key_slot_option
     fi
     key_mount=$(mountpoint_to_file "${key}")
-    mount_order=$(mountorder_to_device "#MAPDIR#/${name}")
-
+    raid_device=$(raid_device_to_disk "#MAPDIR#/${name}")
+    if [ -n "${raid_device}" ]; then
+      mount_order=$(mountorder_to_device "${raid_device}")
+    else
+      mount_order=$(mountorder_to_device "#MAPDIR#/${name}")
+    fi
     if ${unmount}; then
-      do_unmount "${mount_order}"
-      do_crypt_close "${name}"
+      if [ -n "${mount_order}" ]; then
+        printf '0 do_unmount %s\n' "${mount_order}"
+      fi
+      if [ -n "${raid_device}" ]; then
+        printf '1 do_mdadm_stop %s\n' "${raid_device}"
+      fi
+      printf '2 do_crypt_close %s\n' "${name}"
     else
-      do_mount "${key_mount}"
-      do_crypt_open "${name}" "${raw}" "${key}" ${key_slot_option}
-      do_unmount -l "${key_mount}"
-      do_mount "${mount_order}"
+      printf '0 do_mount %s\n' "${key_mount}"
+      printf '1 do_crypt_open %s\n' "${name} ${raw} ${key} ${key_slot_option}"
+      printf '2 do_unmount -l %s\n' "${key_mount}"
+      if [ -n "${mount_order}" ]; then
+        printf '3 do_mount %s\n' "${mount_order}"
+      fi
     fi
+  done | \
+  sort -u | \
+  sort -k1n,1 | \
+  while read -r _ aktion params; do
+    ${aktion} ${params}
   done
 
 # End of file
-- 
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