system: vold2: Initial skeleton for vold2.

  Let there be light.

Signed-off-by: San Mehat <san@android.com>
diff --git a/NetlinkHandler.cpp b/NetlinkHandler.cpp
new file mode 100644
index 0000000..156079f
--- /dev/null
+++ b/NetlinkHandler.cpp
@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2008 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 <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+
+#define LOG_TAG "Vold"
+
+#include <cutils/log.h>
+
+#include <sysutils/NetlinkEvent.h>
+#include "NetlinkHandler.h"
+#include "VolumeManager.h"
+
+NetlinkHandler::NetlinkHandler(int listenerSocket) :
+                NetlinkListener(listenerSocket) {
+}
+
+NetlinkHandler::~NetlinkHandler() {
+}
+
+int NetlinkHandler::start() {
+    return this->startListener();
+}
+
+int NetlinkHandler::stop() {
+    return this->stopListener();
+}
+
+void NetlinkHandler::onEvent(NetlinkEvent *evt) {
+    VolumeManager *vm = VolumeManager::Instance();
+    const char *subsys = evt->getSubsystem();
+    int action = evt->getAction();
+
+    if (!subsys) {
+        LOGW("No subsystem found in netlink event");
+        return;
+    }
+
+    if (!strcmp(subsys, "block")) {
+        const char *devpath = evt->findParam("DEVPATH");
+        const char *devtype = evt->findParam("DEVTYPE");
+        int major = atoi(evt->findParam("MAJOR"));
+        int minor = atoi(evt->findParam("MINOR"));
+
+        LOGI("Block event %d, type %s, %d:%d, path '%s'", action, devtype, major, minor, devpath);
+
+        if (!strcmp(devtype, "disk")) {
+            const char *tmp = evt->findParam("NPARTS");
+
+            if (!tmp) {
+                LOGE("Disk uevent missing 'NPARTS' parameter");
+                return;
+            }
+            if (action == NetlinkEvent::NlActionAdd)
+                vm->handleDiskInserted(devpath, major, minor, atoi(tmp));
+            else if (action == NetlinkEvent::NlActionRemove)
+                vm->handleDiskRemoved(major, minor);
+        } else {
+            const char *tmp = evt->findParam("PARTN");
+
+            if (!tmp) {
+                LOGE("Partition uevent missing 'PARTN' parameter");
+                return;
+            }
+            if (action == NetlinkEvent::NlActionAdd)
+                vm->handlePartCreated(devpath, major, minor, atoi(tmp));
+            else if (action == NetlinkEvent::NlActionRemove)
+                vm->handlePartRemoved(major, minor);
+        }
+        LOGD("Block event handled");
+    } else if (!strcmp(subsys, "battery")) {
+    } else if (!strcmp(subsys, "power_supply")) {
+    } else {
+        LOGE("Dropping %s netlink event", subsys);
+    }
+}