Implement early_virtmgr
early_virtmgr will serve clients as a service running early boot VMs
which can start before /data mount. early_virtmgr will act similar to
virtmgr, serving IVirtualizationService aidl interface.
See docs/early_vm.md for more details.
Bug: 354059713
Test: add a demo binary, see logcat
Change-Id: I4e842cb108bf0f6f7620e711ffa429a03c9b25eb
diff --git a/android/virtmgr/src/main.rs b/android/virtmgr/src/main.rs
index a4e75a7..e4a96ac 100644
--- a/android/virtmgr/src/main.rs
+++ b/android/virtmgr/src/main.rs
@@ -102,7 +102,17 @@
ProcessState::start_thread_pool();
if cfg!(early) {
- panic!("Early VM not implemented");
+ // we can't access VirtualizationServiceInternal, so directly call rlimit
+ let pid = i32::from(*PID_CURRENT);
+ let lim = libc::rlimit { rlim_cur: libc::RLIM_INFINITY, rlim_max: libc::RLIM_INFINITY };
+
+ // SAFETY: borrowing the new limit struct only. prlimit doesn't use lim outside its lifetime
+ let ret = unsafe { libc::prlimit(pid, libc::RLIMIT_MEMLOCK, &lim, std::ptr::null_mut()) };
+ if ret == -1 {
+ panic!("rlimit error: {}", std::io::Error::last_os_error());
+ } else if ret != 0 {
+ panic!("Unexpected return value from prlimit(): {ret}");
+ }
} else {
GLOBAL_SERVICE.removeMemlockRlimit().expect("Failed to remove memlock rlimit");
}