diff --git a/host/lib/update_payload/common.py b/host/lib/update_payload/common.py
index 584eb35..2beabea 100644
--- a/host/lib/update_payload/common.py
+++ b/host/lib/update_payload/common.py
@@ -33,12 +33,16 @@
   REPLACE_BZ = _CLASS.REPLACE_BZ
   MOVE = _CLASS.MOVE
   BSDIFF = _CLASS.BSDIFF
-  ALL = (REPLACE, REPLACE_BZ, MOVE, BSDIFF)
+  SOURCE_COPY = _CLASS.SOURCE_COPY
+  SOURCE_BSDIFF = _CLASS.SOURCE_BSDIFF
+  ALL = (REPLACE, REPLACE_BZ, MOVE, BSDIFF, SOURCE_COPY, SOURCE_BSDIFF)
   NAMES = {
       REPLACE: 'REPLACE',
       REPLACE_BZ: 'REPLACE_BZ',
       MOVE: 'MOVE',
       BSDIFF: 'BSDIFF',
+      SOURCE_COPY: 'SOURCE_COPY',
+      SOURCE_BSDIFF: 'SOURCE_BSDIFF'
   }
 
   def __init__(self):
diff --git a/host/lib/update_payload/update_metadata_pb2.py b/host/lib/update_payload/update_metadata_pb2.py
index 9762d5a..895e465 100644
--- a/host/lib/update_payload/update_metadata_pb2.py
+++ b/host/lib/update_payload/update_metadata_pb2.py
@@ -10,7 +10,7 @@
 DESCRIPTOR = descriptor.FileDescriptor(
   name='update_metadata.proto',
   package='chromeos_update_engine',
-  serialized_pb='\n\x15update_metadata.proto\x12\x16\x63hromeos_update_engine\"1\n\x06\x45xtent\x12\x13\n\x0bstart_block\x18\x01 \x01(\x04\x12\x12\n\nnum_blocks\x18\x02 \x01(\x04\"z\n\nSignatures\x12@\n\nsignatures\x18\x01 \x03(\x0b\x32,.chromeos_update_engine.Signatures.Signature\x1a*\n\tSignature\x12\x0f\n\x07version\x18\x01 \x01(\r\x12\x0c\n\x04\x64\x61ta\x18\x02 \x01(\x0c\"+\n\rPartitionInfo\x12\x0c\n\x04size\x18\x01 \x01(\x04\x12\x0c\n\x04hash\x18\x02 \x01(\x0c\"w\n\tImageInfo\x12\r\n\x05\x62oard\x18\x01 \x01(\t\x12\x0b\n\x03key\x18\x02 \x01(\t\x12\x0f\n\x07\x63hannel\x18\x03 \x01(\t\x12\x0f\n\x07version\x18\x04 \x01(\t\x12\x15\n\rbuild_channel\x18\x05 \x01(\t\x12\x15\n\rbuild_version\x18\x06 \x01(\t\"\xa9\x08\n\x14\x44\x65ltaArchiveManifest\x12Y\n\x12install_operations\x18\x01 \x03(\x0b\x32=.chromeos_update_engine.DeltaArchiveManifest.InstallOperation\x12`\n\x19kernel_install_operations\x18\x02 \x03(\x0b\x32=.chromeos_update_engine.DeltaArchiveManifest.InstallOperation\x12\x18\n\nblock_size\x18\x03 \x01(\r:\x04\x34\x30\x39\x36\x12\x19\n\x11signatures_offset\x18\x04 \x01(\x04\x12\x17\n\x0fsignatures_size\x18\x05 \x01(\x04\x12>\n\x0fold_kernel_info\x18\x06 \x01(\x0b\x32%.chromeos_update_engine.PartitionInfo\x12>\n\x0fnew_kernel_info\x18\x07 \x01(\x0b\x32%.chromeos_update_engine.PartitionInfo\x12>\n\x0fold_rootfs_info\x18\x08 \x01(\x0b\x32%.chromeos_update_engine.PartitionInfo\x12>\n\x0fnew_rootfs_info\x18\t \x01(\x0b\x32%.chromeos_update_engine.PartitionInfo\x12\x39\n\x0eold_image_info\x18\n \x01(\x0b\x32!.chromeos_update_engine.ImageInfo\x12\x39\n\x0enew_image_info\x18\x0b \x01(\x0b\x32!.chromeos_update_engine.ImageInfo\x12\x18\n\rminor_version\x18\x0c \x01(\r:\x01\x30\x1a\xf5\x02\n\x10InstallOperation\x12P\n\x04type\x18\x01 \x02(\x0e\x32\x42.chromeos_update_engine.DeltaArchiveManifest.InstallOperation.Type\x12\x13\n\x0b\x64\x61ta_offset\x18\x02 \x01(\r\x12\x13\n\x0b\x64\x61ta_length\x18\x03 \x01(\r\x12\x33\n\x0bsrc_extents\x18\x04 \x03(\x0b\x32\x1e.chromeos_update_engine.Extent\x12\x12\n\nsrc_length\x18\x05 \x01(\x04\x12\x33\n\x0b\x64st_extents\x18\x06 \x03(\x0b\x32\x1e.chromeos_update_engine.Extent\x12\x12\n\ndst_length\x18\x07 \x01(\x04\x12\x18\n\x10\x64\x61ta_sha256_hash\x18\x08 \x01(\x0c\"9\n\x04Type\x12\x0b\n\x07REPLACE\x10\x00\x12\x0e\n\nREPLACE_BZ\x10\x01\x12\x08\n\x04MOVE\x10\x02\x12\n\n\x06\x42SDIFF\x10\x03\x42\x02H\x03')
+  serialized_pb='\n\x15update_metadata.proto\x12\x16\x63hromeos_update_engine\"1\n\x06\x45xtent\x12\x13\n\x0bstart_block\x18\x01 \x01(\x04\x12\x12\n\nnum_blocks\x18\x02 \x01(\x04\"z\n\nSignatures\x12@\n\nsignatures\x18\x01 \x03(\x0b\x32,.chromeos_update_engine.Signatures.Signature\x1a*\n\tSignature\x12\x0f\n\x07version\x18\x01 \x01(\r\x12\x0c\n\x04\x64\x61ta\x18\x02 \x01(\x0c\"+\n\rPartitionInfo\x12\x0c\n\x04size\x18\x01 \x01(\x04\x12\x0c\n\x04hash\x18\x02 \x01(\x0c\"w\n\tImageInfo\x12\r\n\x05\x62oard\x18\x01 \x01(\t\x12\x0b\n\x03key\x18\x02 \x01(\t\x12\x0f\n\x07\x63hannel\x18\x03 \x01(\t\x12\x0f\n\x07version\x18\x04 \x01(\t\x12\x15\n\rbuild_channel\x18\x05 \x01(\t\x12\x15\n\rbuild_version\x18\x06 \x01(\t\"\xcd\x08\n\x14\x44\x65ltaArchiveManifest\x12Y\n\x12install_operations\x18\x01 \x03(\x0b\x32=.chromeos_update_engine.DeltaArchiveManifest.InstallOperation\x12`\n\x19kernel_install_operations\x18\x02 \x03(\x0b\x32=.chromeos_update_engine.DeltaArchiveManifest.InstallOperation\x12\x18\n\nblock_size\x18\x03 \x01(\r:\x04\x34\x30\x39\x36\x12\x19\n\x11signatures_offset\x18\x04 \x01(\x04\x12\x17\n\x0fsignatures_size\x18\x05 \x01(\x04\x12>\n\x0fold_kernel_info\x18\x06 \x01(\x0b\x32%.chromeos_update_engine.PartitionInfo\x12>\n\x0fnew_kernel_info\x18\x07 \x01(\x0b\x32%.chromeos_update_engine.PartitionInfo\x12>\n\x0fold_rootfs_info\x18\x08 \x01(\x0b\x32%.chromeos_update_engine.PartitionInfo\x12>\n\x0fnew_rootfs_info\x18\t \x01(\x0b\x32%.chromeos_update_engine.PartitionInfo\x12\x39\n\x0eold_image_info\x18\n \x01(\x0b\x32!.chromeos_update_engine.ImageInfo\x12\x39\n\x0enew_image_info\x18\x0b \x01(\x0b\x32!.chromeos_update_engine.ImageInfo\x12\x18\n\rminor_version\x18\x0c \x01(\r:\x01\x30\x1a\x99\x03\n\x10InstallOperation\x12P\n\x04type\x18\x01 \x02(\x0e\x32\x42.chromeos_update_engine.DeltaArchiveManifest.InstallOperation.Type\x12\x13\n\x0b\x64\x61ta_offset\x18\x02 \x01(\r\x12\x13\n\x0b\x64\x61ta_length\x18\x03 \x01(\r\x12\x33\n\x0bsrc_extents\x18\x04 \x03(\x0b\x32\x1e.chromeos_update_engine.Extent\x12\x12\n\nsrc_length\x18\x05 \x01(\x04\x12\x33\n\x0b\x64st_extents\x18\x06 \x03(\x0b\x32\x1e.chromeos_update_engine.Extent\x12\x12\n\ndst_length\x18\x07 \x01(\x04\x12\x18\n\x10\x64\x61ta_sha256_hash\x18\x08 \x01(\x0c\"]\n\x04Type\x12\x0b\n\x07REPLACE\x10\x00\x12\x0e\n\nREPLACE_BZ\x10\x01\x12\x08\n\x04MOVE\x10\x02\x12\n\n\x06\x42SDIFF\x10\x03\x12\x0f\n\x0bSOURCE_COPY\x10\x04\x12\x11\n\rSOURCE_BSDIFF\x10\x05\x42\x02H\x03')
 
 
 
@@ -36,11 +36,19 @@
       name='BSDIFF', index=3, number=3,
       options=None,
       type=None),
+    descriptor.EnumValueDescriptor(
+      name='SOURCE_COPY', index=4, number=4,
+      options=None,
+      type=None),
+    descriptor.EnumValueDescriptor(
+      name='SOURCE_BSDIFF', index=5, number=5,
+      options=None,
+      type=None),
   ],
   containing_type=None,
   options=None,
   serialized_start=1399,
-  serialized_end=1456,
+  serialized_end=1492,
 )
 
 
@@ -313,7 +321,7 @@
   is_extendable=False,
   extension_ranges=[],
   serialized_start=1083,
-  serialized_end=1456,
+  serialized_end=1492,
 )
 
 _DELTAARCHIVEMANIFEST = descriptor.Descriptor(
@@ -417,7 +425,7 @@
   is_extendable=False,
   extension_ranges=[],
   serialized_start=391,
-  serialized_end=1456,
+  serialized_end=1492,
 )