MountService: Add API call for getting a list of pids currently using the specified mountpoint
Signed-off-by: San Mehat <san@google.com>
diff --git a/core/java/android/os/storage/IMountService.aidl b/core/java/android/os/storage/IMountService.aidl
index 3d1ef25..816baf3 100644
--- a/core/java/android/os/storage/IMountService.aidl
+++ b/core/java/android/os/storage/IMountService.aidl
@@ -72,6 +72,12 @@
int formatVolume(String mountPoint);
/**
+ * Returns an array of pids with open files on
+ * the specified path.
+ */
+ int[] getStorageUsers(String path);
+
+ /**
* Gets the state of an volume via it's mountpoint.
*/
String getVolumeState(String mountPoint);
@@ -94,7 +100,7 @@
* NOTE: Ensure all references are released prior to deleting.
* Returns an int consistent with MountServiceResultCode
*/
- int destroySecureContainer(String id);
+ int destroySecureContainer(String id);
/*
* Mount a secure container with the specified key and owner UID.
diff --git a/services/java/com/android/server/MountService.java b/services/java/com/android/server/MountService.java
index e764bbb..4e2ffa4 100644
--- a/services/java/com/android/server/MountService.java
+++ b/services/java/com/android/server/MountService.java
@@ -80,6 +80,7 @@
*/
public static final int VolumeListResult = 110;
public static final int AsecListResult = 111;
+ public static final int StorageUsersListResult = 112;
/*
* 200 series - Requestion action has been successfully completed.
@@ -795,6 +796,31 @@
return doFormatVolume(path);
}
+ public int []getStorageUsers(String path) {
+ validatePermission(android.Manifest.permission.MOUNT_UNMOUNT_FILESYSTEMS);
+ waitForReady();
+ try {
+ String[] r = mConnector.doListCommand(
+ String.format("storage users %s", path),
+ VoldResponseCode.StorageUsersListResult);
+ // FMT: <pid> <process name>
+ int[] data = new int[r.length];
+ for (int i = 0; i < r.length; i++) {
+ String []tok = r[i].split(" ");
+ try {
+ data[i] = Integer.parseInt(tok[0]);
+ } catch (NumberFormatException nfe) {
+ Log.e(TAG, String.format("Error parsing pid %s", tok[0]));
+ return new int[0];
+ }
+ }
+ return data;
+ } catch (NativeDaemonConnectorException e) {
+ Log.e(TAG, "Failed to retrieve storage users list", e);
+ return new int[0];
+ }
+ }
+
private void warnOnNotMounted() {
if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
Log.w(TAG, "getSecureContainerList() called when storage not mounted");
