installd: Implement support for userdata snapshot and restore.
Adds two binder APIs:
- snapshotAppData: Makes a copy of the apps credential encrypted
and/or device encrypted data for a given user to one of
/data/misc_[ce|de]/rollback. This path is writable only by
installd.
- restoreAppDataSnapshot: Restores a copy of the apps credential
encrypted and/or device encrypted data from a snapshot, if one
exists.
Implemented for use from RollbackManagerService, which will make
a transient copy of an app package as well as its data in order to
roll them back within a specified window.
Bug: 112431924
Test: installd_utils_test, installd_service_test
Change-Id: I3e4d36c11e52fb885b585b1946e215cf986206fd
diff --git a/cmds/installd/tests/installd_utils_test.cpp b/cmds/installd/tests/installd_utils_test.cpp
index ad7a5ae..ce99fff 100644
--- a/cmds/installd/tests/installd_utils_test.cpp
+++ b/cmds/installd/tests/installd_utils_test.cpp
@@ -544,5 +544,35 @@
EXPECT_EQ(0, MatchExtension("docx"));
}
+TEST_F(UtilsTest, TestRollbackPaths) {
+ EXPECT_EQ("/data/misc_ce/0/rollback/com.foo",
+ create_data_misc_ce_rollback_package_path(nullptr, 0, "com.foo"));
+ EXPECT_EQ("/data/misc_ce/10/rollback/com.foo",
+ create_data_misc_ce_rollback_package_path(nullptr, 10, "com.foo"));
+
+ EXPECT_EQ("/data/misc_de/0/rollback/com.foo",
+ create_data_misc_de_rollback_package_path(nullptr, 0, "com.foo"));
+ EXPECT_EQ("/data/misc_de/10/rollback/com.foo",
+ create_data_misc_de_rollback_package_path(nullptr, 10, "com.foo"));
+
+ EXPECT_EQ("/data/misc_ce/0/rollback",
+ create_data_misc_ce_rollback_path(nullptr, 0));
+ EXPECT_EQ("/data/misc_ce/10/rollback",
+ create_data_misc_ce_rollback_path(nullptr, 10));
+
+ EXPECT_EQ("/data/misc_de/0/rollback",
+ create_data_misc_de_rollback_path(nullptr, 0));
+ EXPECT_EQ("/data/misc_de/10/rollback",
+ create_data_misc_de_rollback_path(nullptr, 10));
+
+ // These last couple of cases are never exercised in production because we
+ // only snapshot apps in the primary data partition. Exercise them here for
+ // the sake of completeness.
+ EXPECT_EQ("/mnt/expand/57f8f4bc-abf4-655f-bf67-946fc0f9f25b/misc_ce/0/rollback/com.example",
+ create_data_misc_ce_rollback_package_path("57f8f4bc-abf4-655f-bf67-946fc0f9f25b", 0, "com.example"));
+ EXPECT_EQ("/mnt/expand/57f8f4bc-abf4-655f-bf67-946fc0f9f25b/misc_de/0/rollback/com.example",
+ create_data_misc_de_rollback_package_path("57f8f4bc-abf4-655f-bf67-946fc0f9f25b", 0, "com.example"));
+}
+
} // namespace installd
} // namespace android