init: Use sepolicy version instead
This commit uses vendor sepolicy file version (defined in
`/vendor/etc/selinux/plat_sepolicy_vers.txt`) to determine whether the
source context should be set as `u:r:vendor_init:s0`.
Before this commit, the criterion was `ro.vndk.version` >= 28. However,
the check in `property_service.cpp` will always be true because
`ro.vndk.version` hasn't been loaded from `/vendor/default.prop`.
Furthermore, under some circumstances, `ro.vndk.version` may be
different from `plat_sepolicy_vers.txt` (e.g. O-MR1 vendor does not
define `ro.vndk.version`).
Bug: 78605339 # high-level bug to combine O-MR1 and P GSI
Bug: 79135481 # the usage of `ro.vndk.version` in init
Test: vts-tradefed run vts -m VtsTrebleVintfTest # tetheroffload
Change-Id: Ied46e9346b4ca7931aa4dcf1c9dbc11de0e12d93
diff --git a/init/selinux.h b/init/selinux.h
index 7b880ec..30069b5 100644
--- a/init/selinux.h
+++ b/init/selinux.h
@@ -27,6 +27,7 @@
void SelinuxRestoreContext();
void SelinuxSetupKernelLogging();
+bool SelinuxHasVendorInit();
void SelabelInitialize();
bool SelabelLookupFileContext(const std::string& key, int type, std::string* result);