sepolicy: add version_policy tool and version non-platform policy.
In order to support platform changes without simultaneous updates from
non-platform components, the platform and non-platform policies must be
split. In order to provide a guarantee that policy written for
non-platform objects continues to provide the same access, all types
exposed to non-platform policy are versioned by converting them and the
policy using them into attributes.
This change performs that split, the subsequent versioning and also
generates a mapping file to glue the different policy components
together.
Test: Device boots and runs.
Bug: 31369363
Change-Id: Ibfd3eb077bd9b8e2ff3b2e6a0ca87e44d78b1317
diff --git a/private/recovery_refresh.te b/private/recovery_refresh.te
index 8204465..d1cfbfe 100644
--- a/private/recovery_refresh.te
+++ b/private/recovery_refresh.te
@@ -1,3 +1,7 @@
# type_transition must be private policy the domain_trans rules could stay
# public, but conceptually should go with this
init_daemon_domain(recovery_refresh)
+
+# recovery_refresh is not allowed to write anywhere
+# TODO: deal with tmpfs_domain pub/priv split properly
+neverallow recovery_refresh { file_type -recovery_refresh_tmpfs userdebug_or_eng(`-coredump_file') }:file write;