Let bmgr inspect the set of whitelisted transports

Needed for compliance testing.

Bug 29072466

Change-Id: I025058ab9197f9e2db062bf0074e79f1cd04b443

4 files changed, 42 insertions, 0 deletions

diff --git a/cmds/bmgr/src/com/android/commands/bmgr/Bmgr.java b/cmds/bmgr/src/com/android/commands/bmgr/Bmgr.java
index 69b5a17300de..5bf80765a7de 100644
--- a/cmds/bmgr/src/com/android/commands/bmgr/Bmgr.java
+++ b/cmds/bmgr/src/com/android/commands/bmgr/Bmgr.java
@@ -122,6 +122,11 @@ public final class Bmgr {
             return;
         }
 
+        if ("whitelist".equals(op)) {
+            doPrintWhitelist();
+            return;
+        }
+
         System.err.println("Unknown command");
         showUsage();
     }
@@ -604,6 +609,20 @@ public final class Bmgr {
         }
     }
 
+    private void doPrintWhitelist() {
+        try {
+            final String[] whitelist = mBmgr.getTransportWhitelist();
+            if (whitelist != null) {
+                for (String transport : whitelist) {
+                    System.out.println(transport);
+                }
+            }
+        } catch (RemoteException e) {
+            System.err.println(e.toString());
+            System.err.println(BMGR_NOT_RUNNING_ERR);
+        }
+    }
+
     private String nextArg() {
         if (mNextArg >= mArgs.length) {
             return null;
diff --git a/core/java/android/app/backup/IBackupManager.aidl b/core/java/android/app/backup/IBackupManager.aidl
index 5d4cc6fe2dc9..a320bbf9d178 100644
--- a/core/java/android/app/backup/IBackupManager.aidl
+++ b/core/java/android/app/backup/IBackupManager.aidl
@@ -218,6 +218,14 @@ interface IBackupManager {
     String[] listAllTransports();
 
     /**
+     * Retrieve the list of whitelisted transport components.  Callers do </i>not</i> need
+     * any special permission.
+     *
+     * @return The names of all whitelisted transport components defined by the system.
+     */
+    String[] getTransportWhitelist();
+
+    /**
      * Specify the current backup transport.  Callers must hold the
      * android.permission.BACKUP permission to use this method.
      *
diff --git a/services/backup/java/com/android/server/backup/BackupManagerService.java b/services/backup/java/com/android/server/backup/BackupManagerService.java
index 334b228a4ab7..9243f65fa9d4 100644
--- a/services/backup/java/com/android/server/backup/BackupManagerService.java
+++ b/services/backup/java/com/android/server/backup/BackupManagerService.java
@@ -9597,6 +9597,15 @@ if (MORE_DEBUG) Slog.v(TAG, "   + got " + nRead + "; now wanting " + (size - soF
         return list;
     }
 
+    public String[] getTransportWhitelist() {
+        // No permission check, intentionally.
+        String[] whitelist = new String[mTransportWhitelist.size()];
+        for (int i = mTransportWhitelist.size() - 1; i >= 0; i--) {
+            whitelist[i] = mTransportWhitelist.valueAt(i).flattenToShortString();
+        }
+        return whitelist;
+    }
+
     // Select which transport to use for the next backup operation.
     public String selectBackupTransport(String transport) {
         mContext.enforceCallingOrSelfPermission(android.Manifest.permission.BACKUP,
diff --git a/services/backup/java/com/android/server/backup/Trampoline.java b/services/backup/java/com/android/server/backup/Trampoline.java
index e74526338a8f..312b878b284c 100644
--- a/services/backup/java/com/android/server/backup/Trampoline.java
+++ b/services/backup/java/com/android/server/backup/Trampoline.java
@@ -275,6 +275,12 @@ public class Trampoline extends IBackupManager.Stub {
     }
 
     @Override
+    public String[] getTransportWhitelist() {
+        BackupManagerService svc = mService;
+        return (svc != null) ? svc.getTransportWhitelist() : null;
+    }
+
+    @Override
     public String selectBackupTransport(String transport) throws RemoteException {
         BackupManagerService svc = mService;
         return (svc != null) ? svc.selectBackupTransport(transport) : null;