From e3936f5145a98419eb2861f07c1476bdfa2fae6f Mon Sep 17 00:00:00 2001
From: jt1134 <jt1134@gmail.com>
Date: Sat, 22 Sep 2012 23:15:39 -0500
Subject: use logical volumes for system and data, bring back datadata

* use lvm to split eMMC into 2 logical partitions
* use entire available space on OneNAND for /datadata

based on information from: http://bit.ly/OMny8Z

WARNING: WILL WIPE DATA

Change-Id: I3caeec096a6798afafaf03b2eb72c20580272682
---
 updater.sh | 54 ++++++++++++++++++++++++++++++++++++++++++++----------
 1 file changed, 44 insertions(+), 10 deletions(-)

(limited to 'updater.sh')

diff --git a/updater.sh b/updater.sh
index 5baad86..07f835c 100755
--- a/updater.sh
+++ b/updater.sh
@@ -21,6 +21,17 @@ set_log() {
     exec >> $1 2>&1
 }
 
+# ui_print by Chainfire
+OUTFD=$(/tmp/busybox ps | /tmp/busybox grep -v "grep" | /tmp/busybox grep -o -E "update_binary(.*)" | /tmp/busybox cut -d " " -f 3);
+ui_print() {
+  if [ $OUTFD != "" ]; then
+    echo "ui_print ${1} " 1>&$OUTFD;
+    echo "ui_print " 1>&$OUTFD;
+  else
+    echo "${1}";
+  fi;
+}
+
 set -x
 export PATH=/:/sbin:/system/xbin:/system/bin:/tmp:$PATH
 
@@ -29,14 +40,14 @@ if /tmp/busybox test "$1" = cdma ; then
     # CDMA mode
     IS_GSM='/tmp/busybox false'
     SD_PART='/dev/block/mmcblk1p1'
-    DATA_PART='/dev/block/mmcblk0p1'
-    DATA_SIZE='490733568'
+    MMC_PART='/dev/block/mmcblk0p1 /dev/block/mmcblk0p2'
+    MTD_SIZE='490733568'
 else
     # GSM mode
     IS_GSM='/tmp/busybox true'
     SD_PART='/dev/block/mmcblk0p1'
-    DATA_PART='/dev/block/mmcblk0p2'
-    DATA_SIZE='442499072'
+    MMC_PART='/dev/block/mmcblk0p2'
+    MTD_SIZE='442499072'
 fi
 
 # check for old/non-cwm recovery.
@@ -88,7 +99,8 @@ if /tmp/busybox test -e /dev/block/bml7 ; then
     /sbin/reboot now
     exit 0
 
-elif /tmp/busybox test `/tmp/busybox cat /sys/class/mtd/mtd2/size` != "$DATA_SIZE" ; then
+elif /tmp/busybox test `/tmp/busybox cat /sys/class/mtd/mtd2/size` != "$MTD_SIZE" || \
+    /tmp/busybox test `/tmp/busybox cat /sys/class/mtd/mtd2/name` != "datadata" ; then
     # we're running on a mtd (old) device
 
     # make sure sdcard is mounted
@@ -97,6 +109,19 @@ elif /tmp/busybox test `/tmp/busybox cat /sys/class/mtd/mtd2/size` != "$DATA_SIZ
     # everything is logged into /sdcard/cyanogenmod_mtd_old.log
     set_log /sdcard/cyanogenmod_mtd_old.log
 
+    if ! /tmp/busybox test -e /.accept_wipe ; then
+        /tmp/busybox touch /.accept_wipe
+        ui_print
+        ui_print "============================================"
+        ui_print "This ROM uses an incompatible partition layout"
+        ui_print "Your /data will be wiped upon installation"
+        ui_print "Run this update.zip again to confirm install"
+        ui_print "============================================"
+        ui_print
+        exit 9
+    fi
+    /tmp/busybox rm /.accept_wipe
+
     # write the package path to sdcard cyanogenmod.cfg
     if /tmp/busybox test -n "$UPDATE_PACKAGE" ; then
         /tmp/busybox echo "$UPDATE_PACKAGE" > /sdcard/cyanogenmod.cfg
@@ -183,13 +208,22 @@ elif /tmp/busybox test -e /dev/block/mtdblock0 ; then
     # remove the cyanogenmod.cfg to prevent this from looping
     /tmp/busybox rm -f /sdcard/cyanogenmod.cfg
 
-    # unmount and format system (recovery seems to expect system to be unmounted)
+    # unmount system and data (recovery seems to expect system to be unmounted)
     /tmp/busybox umount -l /system
-    /tmp/make_ext4fs -b 4096 -g 32768 -i 8192 -I 256 -a /system $DATA_PART
-
-    # unmount and format data
     /tmp/busybox umount -l /data
-    /tmp/erase_image userdata
+
+    # setup lvm volumes
+    /lvm/sbin/lvm pvcreate $MMC_PART
+    /lvm/sbin/lvm vgcreate lvpool $MMC_PART
+    /lvm/sbin/lvm lvcreate -L 400M -n system lvpool
+    /lvm/sbin/lvm lvcreate -l 100%FREE -n userdata lvpool
+
+    # format data (/system will be formatted by updater-script)
+    /tmp/make_ext4fs -b 4096 -g 32768 -i 8192 -I 256 -l -16384 -a /data /dev/lvpool/userdata
+
+    # unmount and format datadata
+    /tmp/busybox umount -l /datadata
+    /tmp/erase_image datadata
 
     # restart into recovery so the user can install further packages before booting
     /tmp/busybox touch /cache/.startrecovery
-- 
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