[Thread] move Thread settings data to APEX data dir
This commit includes two sepolicy changes:
1. change threadnetwork data file to
/data/misc/apexdata/com.android.tethering/threadnetwork
2. use apex_tethering_data_file for files under
/data/misc/apexdata/com.android.tethering
The background is that the Thread daemon (ot_daemon) is merged into the
Tethering mainline module, which means the the Tehtering module now has
code running in both system_server and the standalone unprivileged
ot_daemon process. To prevent ot_daemon from accessing other
apex_system_server_data_file dirs, here use the specific
apex_tethering_data_file for both Tethering and Thread files (A
subdirectory threadnetwork/ will be created for Thread at runtime). This
is similar to apex_art_data_file and apex_virt_data_file.
Note that a file_contexts rule like
```
/data/misc/apexdata/com\.android\.tethering/threadnetwork(/.*)? u:object_r:apex_threadnetwork_data_file:s0
```
won't work because the threadnetwork/ subdir doesn't exist before the
sepolicy rules are evaluated.
Bug: 309932508
Test: manually verified that Thread settings file can be written to
/data/misc/apexdata/com.android.tethering/threadnetwork
Change-Id: I66539865ef388115c8e9b388b43291d8faf1f384
diff --git a/private/file.te b/private/file.te
index de2581d..d289f43 100644
--- a/private/file.te
+++ b/private/file.te
@@ -77,12 +77,14 @@
# /data/misc/apexdata/com.android.virt
type apex_virt_data_file, file_type, data_file_type, core_data_file_type, apex_data_file_type;
+# /data/misc/apexdata/com.android.tethering
+type apex_tethering_data_file, file_type, data_file_type, core_data_file_type, apex_data_file_type;
+
# legacy labels for various /data/misc[_ce|_de]/*/apexdata directories - retained
# for backward compatibility b/217581286
type apex_appsearch_data_file, file_type, data_file_type, core_data_file_type, apex_data_file_type;
type apex_permission_data_file, file_type, data_file_type, core_data_file_type, apex_data_file_type;
type apex_scheduling_data_file, file_type, data_file_type, core_data_file_type, apex_data_file_type;
-type apex_tethering_data_file, file_type, data_file_type, core_data_file_type, apex_data_file_type;
type apex_wifi_data_file, file_type, data_file_type, core_data_file_type, apex_data_file_type;
# /data/font/files
@@ -134,9 +136,6 @@
# in to satisfy MLS constraints for trusted domains.
type prng_seeder_socket, file_type, coredomain_socket, mlstrustedobject;
-# /data/misc/threadnetwork
-type threadnetwork_data_file, file_type, data_file_type, core_data_file_type;
-
# /sys/firmware/devicetree/base/avf
type sysfs_dt_avf, fs_type, sysfs_type;