Allow IO During boot process, BootActions.

NOTE: this is only compiled into products with PRODUCT_IOT=true.

Introduce BootActions that a developer can provide to manipulate IO
before the android framework comes up on boot.

We will look for a configuration file at /oem/app/etc/boot_action.conf and
expect it to tell us the name of a shared library. We will then fetch
this library from /oem/app/lib/${arch}/ and load it. We expect it to export
boot_action_init(), boot_action_shutdown(), and optionally
boot_action_start_part(int partNumber, int playNumber).

We will then call boot_action_init() during boot after PeripheralManager
is up and call boot_action_shutdown() when the android framework is up
and we are going to start loading APKs.

We will also call boot_action_start_part(*) when each part of the boot
animation is started, use this if you want to synchronize the boot
action and the boot animation.

Boot actions run in a restricted environment and in general can only
make calls to PeripheralManager.

Bug: 37992717
Test: Pushed to local imx7d to test boot actions, pushed to bullhead test that animation+sound still works.
Change-Id: I9e53a17567f8028ea84486d637e1d231ee1125e1

1 files changed, 61 insertions, 0 deletions

diff --git a/cmds/bootanimation/BootAnimationUtil.cpp b/cmds/bootanimation/BootAnimationUtil.cpp
new file mode 100644
index 000000000000..377d6ce372f2
--- /dev/null
+++ b/cmds/bootanimation/BootAnimationUtil.cpp
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "BootAnimationUtil.h"
+
+#include <inttypes.h>
+
+#include <binder/IServiceManager.h>
+#include <cutils/properties.h>
+#include <utils/Log.h>
+#include <utils/SystemClock.h>
+
+namespace android {
+
+bool bootAnimationDisabled() {
+    char value[PROPERTY_VALUE_MAX];
+    property_get("debug.sf.nobootanimation", value, "0");
+    if (atoi(value) > 0) {
+      return false;
+    }
+
+    property_get("ro.boot.quiescent", value, "0");
+    return atoi(value) > 0;
+}
+
+void waitForSurfaceFlinger() {
+    // TODO: replace this with better waiting logic in future, b/35253872
+    int64_t waitStartTime = elapsedRealtime();
+    sp<IServiceManager> sm = defaultServiceManager();
+    const String16 name("SurfaceFlinger");
+    const int SERVICE_WAIT_SLEEP_MS = 100;
+    const int LOG_PER_RETRIES = 10;
+    int retry = 0;
+    while (sm->checkService(name) == nullptr) {
+        retry++;
+        if ((retry % LOG_PER_RETRIES) == 0) {
+            ALOGW("Waiting for SurfaceFlinger, waited for %" PRId64 " ms",
+                  elapsedRealtime() - waitStartTime);
+        }
+        usleep(SERVICE_WAIT_SLEEP_MS * 1000);
+    };
+    int64_t totalWaited = elapsedRealtime() - waitStartTime;
+    if (totalWaited > SERVICE_WAIT_SLEEP_MS) {
+        ALOGI("Waiting for SurfaceFlinger took %" PRId64 " ms", totalWaited);
+    }
+}
+
+}  // namespace android