Support GKI updates
Adds proper file_contexts and domains for pre/postinstall hooks.
Allow the pre/postinstall hooks to communicate with update_engine stable
service.
Bug: 161563386
Test: apply a GKI update
Change-Id: I4437aab8e87ccbe55858150b95f67ec6e445ac1f
diff --git a/private/apexd.te b/private/apexd.te
index 97e2539..eb0adb8 100644
--- a/private/apexd.te
+++ b/private/apexd.te
@@ -134,6 +134,9 @@
domain_auto_trans(apexd, apex_test_prepostinstall_exec, apex_test_prepostinstall)
')
+# Allow transition to GKI update pre/post install domain
+domain_auto_trans(apexd, gki_apex_prepostinstall_exec, gki_apex_prepostinstall)
+
# Allow apexd to be invoked with logwrapper from init during userspace reboot.
allow apexd devpts:chr_file { read write };
diff --git a/private/compat/30.0/30.0.ignore.cil b/private/compat/30.0/30.0.ignore.cil
index bcb571d..1ebfe88 100644
--- a/private/compat/30.0/30.0.ignore.cil
+++ b/private/compat/30.0/30.0.ignore.cil
@@ -8,6 +8,8 @@
adbd_config_prop
apex_info_file
debugfs_kprobes
+ gki_apex_prepostinstall
+ gki_apex_prepostinstall_exec
gnss_device
keystore2_key_contexts_file
mediatranscoding_tmpfs
diff --git a/private/gki_apex_prepostinstall.te b/private/gki_apex_prepostinstall.te
new file mode 100644
index 0000000..fa5cd14
--- /dev/null
+++ b/private/gki_apex_prepostinstall.te
@@ -0,0 +1,20 @@
+# GKI pre- & post-install hooks.
+#
+# Allow to run pre- and post-install hooks for GKI APEXes
+
+type gki_apex_prepostinstall, domain, coredomain;
+type gki_apex_prepostinstall_exec, system_file_type, exec_type, file_type;
+
+# Execute /system/bin/sh.
+allow gki_apex_prepostinstall shell_exec:file rx_file_perms;
+
+# Execute various toolsbox utilities.
+allow gki_apex_prepostinstall toolbox_exec:file rx_file_perms;
+
+# Allow preinstall.sh to execute update_engine_stable_client binary.
+allow gki_apex_prepostinstall gki_apex_prepostinstall_exec:file execute_no_trans;
+
+# Allow preinstall hook to communicate with update_engine to execute update.
+binder_use(gki_apex_prepostinstall)
+allow gki_apex_prepostinstall update_engine_stable_service:service_manager find;
+binder_call(gki_apex_prepostinstall, update_engine)
diff --git a/private/update_engine.te b/private/update_engine.te
index 539399e..a33e675 100644
--- a/private/update_engine.te
+++ b/private/update_engine.te
@@ -14,3 +14,6 @@
# Allow to get the DSU status
get_prop(update_engine, gsid_prop)
+
+# Allow update_engine to call the callback function provided by GKI update hook.
+binder_call(update_engine, gki_apex_prepostinstall)