1 files changed, 29 insertions, 32 deletions

diff --git a/src/initrd/btrfs-create.sh b/src/initrd/btrfs-create.sh
index 9604340..c3cfcbb 100644
--- a/src/initrd/btrfs-create.sh
+++ b/src/initrd/btrfs-create.sh
@@ -71,13 +71,15 @@ losetup_layers()
         done
     elif [ -e /dev/disk/by-partlabel/samizdat-rootfs ]
     then
-        local dev
-        for dev in samizdat-rootfs
-        do
-            umount /dev/disk/by-partlabel/$dev
-            dd if=/dev/zero of=/$dev.rw bs=1M count=10
-            dm_snapshot /dev/disk/by-partlabel/$dev /$dev.rw
-        done
+        # TODO: prevent raciness
+        umount /dev/disk/by-partlabel/samizdat-rootfs
+        if [ -e /dev/disk/by-partlabel/samizdat-patchfs ]
+        then
+            umount /dev/disk/by-partlabel/samizdat-patchfs
+            mountdev=/dev/disk/by-partlabel/samizdat-patchfs
+        else
+            mountdev=/dev/disk/by-partlabel/samizdat-rootfs
+        fi
     else
         bootwait samizdat-nbd-dev
         local dev
@@ -93,20 +95,24 @@ init_samizdat()
 {
   local blockdev="$1" imgfile="$2" uuid
 
-  losetup_layers                                   || return
-  modprobe btrfs                                   || return
-  btrfs device scan                                || return
+  losetup_layers                        || return
+  modprobe btrfs                        || return
+  btrfs device scan                     || return
 
-  uuid=$(choose_uuid)                              || return
-  [ "$uuid" ]                                      || return
-
-  mount -t btrfs UUID="$uuid" /root || return
+  if [ "$mountdev" ]
+  then
+      mount -t btrfs "$mountdev" /root  || return
+  else
+      uuid=$(choose_uuid)               || return
+      [ "$uuid" ]                       || return
+      mount -t btrfs UUID="$uuid" /root || return
+  fi
 
-  btrfs device add "$blockdev" /root               || return
-  mount -o rw,remount /root                        || return
-  samizdat_movemounts "$imgfile"                   || return
+  btrfs device add "$blockdev" /root    || return
+  mount -o rw,remount /root             || return
+  samizdat_movemounts "$imgfile"        || return
 
-  initialize_root_filesystem                       || return
+  initialize_root_filesystem            || return
 }
 
 movemounts()
@@ -248,24 +254,15 @@ filesystem_incomplete()
 
 partition_new_hard_drive_DESTROYING_EVERYTHING()
 {
-    # TODO: get the actual size of the btrfs master and actually triple it. The empty
-    # space can be left available to allow the local machine to boot a
-    # locally-regenerated rootfs seed.
-    sz=3
-    u=GiB
-    actual_sz=$sz$u
-    tripled_sz=$((sz * 3))$u
-    pct=100% # TODO: use 50%
-
-    local target="$1" sz=6GiB
+    local target="$1" sz=2910
     # [ "$(parted -sm "$target" print | grep -c :)"  = 1 ] || return
     parted "$target" -sm                                                     \
-           unit B                                                            \
+           unit MiB                                                          \
            mklabel gpt                                                       \
-           mkpart samizdat-grub-incomplete 32KiB 8MiB                        \
+           mkpart samizdat-grub-incomplete 1 8                               \
            set 1 bios_grub on                                                \
-           mkpart samizdat-plaintext-incomplete btrfs 64MiB $actual_sz       \
-           mkpart samizdat-luks-encrypted-incomplete $tripled_sz $pct        \
+           mkpart samizdat-plaintext-incomplete btrfs 64 $((sz + 64))        \
+           mkpart samizdat-luks-encrypted-incomplete $((sz + 64)) 100%       \
         &&
         udevadm settle
 }