Merge changes from topic "fusectl" into rvc-dev

* changes:
  Abort FUSE filesystems during shutdown.
  Abort FUSE filesystem when Zygote restarts.
  Mount fusectl filesystem.

init/reboot.cpp

@@ -678,9 +678,12 @@ static void DoReboot(unsigned int cmd, const std::string& reason, const std::str
     // Reap subcontext pids.
     ReapAnyOutstandingChildren();
 
-    // 3. send volume shutdown to vold
+    // 3. send volume abort_fuse and volume shutdown to vold
     Service* vold_service = ServiceList::GetInstance().FindService("vold");
     if (vold_service != nullptr && vold_service->IsRunning()) {
+        // Manually abort FUSE connections, since the FUSE daemon is already dead
+        // at this point, and unmounting it might hang.
+        CallVdc("volume", "abort_fuse");
         CallVdc("volume", "shutdown");
         vold_service->Stop();
     } else {

rootdir/init.rc

@@ -177,6 +177,9 @@ on init
     mount binder binder /dev/binderfs stats=global
     chmod 0755 /dev/binderfs
 
+    # Mount fusectl
+    mount fusectl none /sys/fs/fuse/connections
+
     symlink /dev/binderfs/binder /dev/binder
     symlink /dev/binderfs/hwbinder /dev/hwbinder
     symlink /dev/binderfs/vndbinder /dev/vndbinder

rootdir/init.zygote32.rc

@@ -5,6 +5,7 @@ service zygote /system/bin/app_process -Xzygote /system/bin --zygote --start-sys
     group root readproc reserved_disk
     socket zygote stream 660 root system
     socket usap_pool_primary stream 660 root system
+    onrestart exec_background - system system -- /system/bin/vdc volume abort_fuse
     onrestart write /sys/power/state on
     onrestart restart audioserver
     onrestart restart cameraserver

rootdir/init.zygote32_64.rc

@@ -5,6 +5,7 @@ service zygote /system/bin/app_process32 -Xzygote /system/bin --zygote --start-s
     group root readproc reserved_disk
     socket zygote stream 660 root system
     socket usap_pool_primary stream 660 root system
+    onrestart exec_background - system system -- /system/bin/vdc volume abort_fuse
     onrestart write /sys/power/state on
     onrestart restart audioserver
     onrestart restart cameraserver

rootdir/init.zygote64.rc

@@ -5,6 +5,7 @@ service zygote /system/bin/app_process64 -Xzygote /system/bin --zygote --start-s
     group root readproc reserved_disk
     socket zygote stream 660 root system
     socket usap_pool_primary stream 660 root system
+    onrestart exec_background - system system -- /system/bin/vdc volume abort_fuse
     onrestart write /sys/power/state on
     onrestart restart audioserver
     onrestart restart cameraserver

rootdir/init.zygote64_32.rc

@@ -5,6 +5,7 @@ service zygote /system/bin/app_process64 -Xzygote /system/bin --zygote --start-s
     group root readproc reserved_disk
     socket zygote stream 660 root system
     socket usap_pool_primary stream 660 root system
+    onrestart exec_background - system system -- /system/bin/vdc volume abort_fuse
     onrestart write /sys/power/state on
     onrestart restart audioserver
     onrestart restart cameraserver