Add ota_package_file label for OTA packages.

Allow priv_app, uncrypt, update_engine to access the OTA packages at
/data/ota_package (both A/B and non-A/B). GMSCore (priv_app) checks
the existence of the folder, and downloads the package there if present.

Bug: 28944800
Change-Id: I3c0717861fce7f93b33874a99f6a4a55567612a5

file.te

@@ -91,6 +91,8 @@ type apk_private_tmp_file, file_type, data_file_type, mlstrustedobject;
 type dalvikcache_data_file, file_type, data_file_type;
 # /data/ota
 type ota_data_file, file_type, data_file_type;
+# /data/ota_package
+type ota_package_file, file_type, data_file_type, mlstrustedobject;
 # /data/misc/profiles
 type user_profile_data_file, file_type, data_file_type, mlstrustedobject;
 type user_profile_foreign_dex_data_file, file_type, data_file_type, mlstrustedobject;

file_contexts

@@ -246,6 +246,7 @@
 /data/resource-cache(/.*)? u:object_r:resourcecache_data_file:s0
 /data/dalvik-cache(/.*)? u:object_r:dalvikcache_data_file:s0
 /data/ota(/.*)? u:object_r:ota_data_file:s0
+/data/ota_package(/.*)? u:object_r:ota_package_file:s0
 /data/adb(/.*)?		u:object_r:adb_data_file:s0
 /data/anr(/.*)?		u:object_r:anr_data_file:s0
 /data/app(/.*)?                       u:object_r:apk_data_file:s0

priv_app.te

@@ -45,6 +45,10 @@ allow priv_app mnt_media_rw_file:dir search;
 allow priv_app { cache_file cache_recovery_file }:dir create_dir_perms;
 allow priv_app { cache_file cache_recovery_file }:file create_file_perms;
 
+# Write to /data/ota_package for OTA packages.
+allow priv_app ota_package_file:dir rw_dir_perms;
+allow priv_app ota_package_file:file create_file_perms;
+
 # Access to /data/media.
 allow priv_app media_rw_data_file:dir create_dir_perms;
 allow priv_app media_rw_data_file:file create_file_perms;

uncrypt.te

@@ -19,6 +19,10 @@ userdebug_or_eng(`
 allow uncrypt cache_recovery_file:dir rw_dir_perms;
 allow uncrypt cache_recovery_file:file create_file_perms;
 
+# Read OTA zip file at /data/ota_package/.
+allow uncrypt ota_package_file:dir r_dir_perms;
+allow uncrypt ota_package_file:file r_file_perms;
+
 # Write to /dev/socket/uncrypt
 unix_socket_connect(uncrypt, uncrypt, uncrypt)
 

update_engine.te

@@ -56,3 +56,7 @@ allow update_engine update_engine_service:service_manager { add };
 
 # Allow update_engine to call the callback function provided by priv_app.
 binder_call(update_engine, priv_app)
+
+# Read OTA zip file at /data/ota_package/.
+allow update_engine ota_package_file:file r_file_perms;
+allow update_engine ota_package_file:dir r_dir_perms;