95rootfs-block: fix PARTUUID parsing

In the kernel comments PARTUUID is shown using uppercase A-F:
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/init/do_mounts.c?id=HEAD#n183

However, dracut tries to use the value of PARTUUID directly in
/dev/disks/by-partuuid/ which expects the hex to be lowercase. This will
cause root to never be found, oops!

Fix dracut so it can, like the Kernel, accept either casing.

Untested but I added a hack on my local system that was similar.

2 files changed, 6 insertions, 1 deletions

diff --git a/modules.d/95rootfs-block/module-setup.sh b/modules.d/95rootfs-block/module-setup.sh
index 0c7701dc..6167beb1 100755
--- a/modules.d/95rootfs-block/module-setup.sh
+++ b/modules.d/95rootfs-block/module-setup.sh
@@ -31,6 +31,7 @@ depends() {
 
 install() {
     dracut_install umount
+    dracut_install tr
     if ! dracut_module_included "systemd"; then
         inst_hook cmdline 95 "$moddir/parse-block.sh"
         inst_hook pre-udev 30 "$moddir/block-genrules.sh"
diff --git a/modules.d/95rootfs-block/parse-block.sh b/modules.d/95rootfs-block/parse-block.sh
index 0a23ac74..1d88ceba 100755
--- a/modules.d/95rootfs-block/parse-block.sh
+++ b/modules.d/95rootfs-block/parse-block.sh
@@ -10,11 +10,15 @@ case "$root" in
         rootok=1 ;;
     block:UUID=*|UUID=*)
         root="${root#block:}"
+        root="${root#UUID=}"
+        root="$(echo $root | tr "[:upper:]" "[:lower:]")"
         root="block:/dev/disk/by-uuid/${root#UUID=}"
         rootok=1 ;;
     block:PARTUUID=*|PARTUUID=*)
         root="${root#block:}"
-        root="block:/dev/disk/by-partuuid/${root#PARTUUID=}"
+        root="${root#PARTUUID=}"
+        root="$(echo $root | tr "[:upper:]" "[:lower:]")"
+        root="block:/dev/disk/by-partuuid/${root}"
         rootok=1 ;;
     block:PARTLABEL=*|PARTLABEL=*)
         root="${root#block:}"