Copy files on EFS partition to /data on boot

During boot, this CL adds the following sequence of actions:

1. mount original efs partitions(most likely f2fs) on /mnt/vendor/efs
2. copy files in /mnt/vendor/efs to /data/vendor/copied/efs.img
3. fsync all the files in /data/vendor/copied/efs.img
4. rename /data/vendor/copied/efs.img to /data/vendor/copied/efs
5. bind-mount /data/vendor/copied/efs to /mnt/vendor/efs
6. repeat 1-5 for efs_backup and modem_userdata

The original EFS partitions are mounted and only used for file
copying, no destructive action done on original efs partitions.

Test: reformat /data as ext4, boot the device
Bug: 319335586
Change-Id: I4c4024b4cad18199226f5644f98254b2230574d6

Android.bp

@@ -41,3 +41,14 @@ sh_binary {
     vendor: true,
     sub_dir: "hw",
 }
+
+// Filesystem: Copy efs/efs_backup/modem_userdata to /data partition
+// so that they can be accessed under 16K mode. By default, these partitions
+// are 4K F2FS , which can't be mounted under 16K mode.
+// (b/293313353)
+sh_binary {
+    name: "copy_efs_files_to_data",
+    src: "copy_efs_files_to_data.sh",
+    vendor: true,
+}
+

conf/fstab.efs.from_data

@@ -0,0 +1,8 @@
+# Android fstab file.
+# <src>                  <mnt_point>         <type>    <mnt_flags and options>                               <fs_mgr_flags>
+# Create the specific fstab file for efs partitions for flexibility
+/data/vendor/copied/efs             /mnt/vendor/efs             none    bind 	latemount
+
+/data/vendor/copied/efs_backup      /mnt/vendor/efs_backup      none    bind 	latemount
+
+/data/vendor/copied/modem_userdata  /mnt/vendor/modem_userdata  none    bind 	latemount

conf/init.efs.16k.rc

@@ -0,0 +1,27 @@
+
+service copy_efs_files_to_data /vendor/bin/copy_efs_files_to_data
+    user root
+    group root radio system audio media graphics camera
+    stdio_to_kmsg
+    oneshot
+    disabled
+
+on post-fs-data && property:ro.boot.flash.locked=0
+    mkdir /data/vendor/copied 0775 radio system
+    restorecon_recursive /data/vendor/copied
+    restorecon_recursive /mnt/vendor
+    mount_all /vendor/etc/fstab.efs
+    exec_start copy_efs_files_to_data
+    umount_all /vendor/etc/fstab.efs
+    mount_all /vendor/etc/fstab.efs.from_data
+    mount_all /vendor/etc/fstab.persist
+    restorecon_recursive /mnt/vendor/efs
+    restorecon_recursive /mnt/vendor/efs_backup
+    restorecon_recursive /mnt/vendor/modem_userdata
+    setprop ro.vendor.persist.status mounted
+
+on post-fs-data && property:ro.boot.flash.locked=1
+    mount_all /vendor/etc/fstab.efs
+    mount_all /vendor/etc/fstab.persist
+    setprop ro.vendor.persist.status mounted
+

conf/init.efs.4k.rc

@@ -0,0 +1,4 @@
+on post-fs-data
+    mount_all /vendor/etc/fstab.efs
+    mount_all /vendor/etc/fstab.persist
+    setprop ro.vendor.persist.status mounted

conf/init.persist.rc

@@ -36,8 +36,3 @@ on property:ro.vendor.persist.status=mounted
     chown system system /data/vendor/ss/persist/nsp
 
     restart storageproxyd
-
-on post-fs-data
-    mount_all /vendor/etc/fstab.efs
-    mount_all /vendor/etc/fstab.persist
-    setprop ro.vendor.persist.status mounted

conf/init.zuma.rc

@@ -1,4 +1,5 @@
 import /vendor/etc/init/hw/init.zuma.usb.rc
+import /vendor/etc/init/hw/init.persist.rc
 import /vendor/etc/init/hw/init.efs.rc
 import android.hardware.drm@1.2-service.widevine.rc
 import init.exynos.sensorhub.rc

copy_efs_files_to_data.sh

@@ -0,0 +1,40 @@
+#!/vendor/bin/sh
+
+CHECKPOINT_DIR=/data/vendor/copied
+
+BIN_DIR=/vendor/bin
+
+$BIN_DIR/mkdir -p $CHECKPOINT_DIR
+
+function copy_files_to_data()
+{
+  partition_name=$(basename $1)
+  mount_point=$2
+  tmpdir=$CHECKPOINT_DIR/$partition_name.img
+  build_checkpoint=$CHECKPOINT_DIR/$partition_name
+  if [ ! -e $build_checkpoint ]; then
+    $BIN_DIR/rm -rf $tmpdir
+    $BIN_DIR/rm -rf $build_checkpoint
+    cp -rp $mount_point $tmpdir
+    if [ $? -ne 0 ]; then
+      echo "Failed to cp -rp $mount_point $tmpdir"
+      return
+    fi
+    fsync `find $tmpdir -type fd`
+    mv $tmpdir $build_checkpoint
+    if [ $? -ne 0 ]; then
+      echo "mv $tmpdir $build_checkpoint"
+      return
+    fi
+    fsync `dirname $build_checkpoint`
+  fi
+  echo "Successfully copied $mount_point to $build_checkpoint"
+}
+
+chmod g+rx -R /mnt/vendor/efs
+chmod g+rx -R /mnt/vendor/efs_backup
+chmod g+rx -R /mnt/vendor/modem_userdata
+copy_files_to_data "/dev/block/by-name/efs" "/mnt/vendor/efs"
+copy_files_to_data "/dev/block/by-name/efs_backup" "/mnt/vendor/efs_backup"
+copy_files_to_data "/dev/block/by-name/modem_userdata" "/mnt/vendor/modem_userdata"
+

device.mk

@@ -358,7 +358,18 @@ PRODUCT_COPY_FILES += \
 
 PRODUCT_COPY_FILES += \
 	device/google/zuma/conf/init.zuma.rc:$(TARGET_COPY_OUT_VENDOR)/etc/init/hw/init.zuma.rc \
-	device/google/zuma/conf/init.efs.rc:$(TARGET_COPY_OUT_VENDOR)/etc/init/hw/init.efs.rc
+	device/google/zuma/conf/init.persist.rc:$(TARGET_COPY_OUT_VENDOR)/etc/init/hw/init.persist.rc
+
+ifeq (true,$(PRODUCT_16K_DEVELOPER_OPTION))
+PRODUCT_COPY_FILES += \
+	device/google/zuma/conf/init.efs.16k.rc:$(TARGET_COPY_OUT_VENDOR)/etc/init/hw/init.efs.rc \
+	device/google/$(TARGET_BOARD_PLATFORM)/conf/fstab.efs.from_data:$(TARGET_COPY_OUT_VENDOR)/etc/fstab.efs.from_data \
+
+PRODUCT_PACKAGES += copy_efs_files_to_data
+else
+PRODUCT_COPY_FILES += \
+	device/google/zuma/conf/init.efs.4k.rc:$(TARGET_COPY_OUT_VENDOR)/etc/init/hw/init.efs.rc
+endif
 
 ifneq (,$(filter userdebug eng, $(TARGET_BUILD_VARIANT)))
 PRODUCT_COPY_FILES += \
@@ -381,7 +392,8 @@ PRODUCT_PACKAGES += \
 PRODUCT_COPY_FILES += \
 	device/google/$(TARGET_BOARD_PLATFORM)/conf/fstab.persist:$(TARGET_COPY_OUT_VENDOR)/etc/fstab.persist \
 	device/google/$(TARGET_BOARD_PLATFORM)/conf/fstab.modem:$(TARGET_COPY_OUT_VENDOR)/etc/fstab.modem \
-	device/google/$(TARGET_BOARD_PLATFORM)/conf/fstab.efs:$(TARGET_COPY_OUT_VENDOR)/etc/fstab.efs
+	device/google/$(TARGET_BOARD_PLATFORM)/conf/fstab.efs:$(TARGET_COPY_OUT_VENDOR)/etc/fstab.efs \
+
 
 # Shell scripts
 PRODUCT_PACKAGES += \
@@ -1199,3 +1211,4 @@ include device/google/gs-common/touch/twoshay/twoshay.mk
 # since it can't be overridden from /vendor.
 PRODUCT_PRODUCT_PROPERTIES += \
 	dumpstate.strict_run=false
+