Forget private partition keys.

When we forget a private partition, ask vold to also forget the key
for that partition GUID.  This means we need to track both the
filesystem UUID and the partition GUID for a private volume.

Bug: 21782268
Change-Id: Icda1cbb65539d61dacc663428daf3d1a2e4c313e

3 files changed, 16 insertions, 1 deletions

diff --git a/core/java/android/os/storage/VolumeInfo.java b/core/java/android/os/storage/VolumeInfo.java
index 8d11527..e33baa9 100644
--- a/core/java/android/os/storage/VolumeInfo.java
+++ b/core/java/android/os/storage/VolumeInfo.java
@@ -137,6 +137,7 @@ public class VolumeInfo implements Parcelable {
     public final String id;
     public final int type;
     public final DiskInfo disk;
+    public final String partGuid;
     public int mountFlags = 0;
     public int mountUserId = -1;
     public int state = STATE_UNMOUNTED;
@@ -149,10 +150,11 @@ public class VolumeInfo implements Parcelable {
     /** Framework state */
     public final int mtpIndex;
 
-    public VolumeInfo(String id, int type, DiskInfo disk, int mtpIndex) {
+    public VolumeInfo(String id, int type, DiskInfo disk, String partGuid, int mtpIndex) {
         this.id = Preconditions.checkNotNull(id);
         this.type = type;
         this.disk = disk;
+        this.partGuid = partGuid;
         this.mtpIndex = mtpIndex;
     }
 
@@ -164,6 +166,7 @@ public class VolumeInfo implements Parcelable {
         } else {
             disk = null;
         }
+        partGuid = parcel.readString();
         mountFlags = parcel.readInt();
         mountUserId = parcel.readInt();
         state = parcel.readInt();
@@ -385,6 +388,7 @@ public class VolumeInfo implements Parcelable {
         pw.increaseIndent();
         pw.printPair("type", DebugUtils.valueToString(getClass(), "TYPE_", type));
         pw.printPair("diskId", getDiskId());
+        pw.printPair("partGuid", partGuid);
         pw.printPair("mountFlags", DebugUtils.flagsToString(getClass(), "MOUNT_FLAG_", mountFlags));
         pw.printPair("mountUserId", mountUserId);
         pw.printPair("state", DebugUtils.valueToString(getClass(), "STATE_", state));
@@ -453,6 +457,7 @@ public class VolumeInfo implements Parcelable {
         } else {
             parcel.writeInt(0);
         }
+        parcel.writeString(partGuid);
         parcel.writeInt(mountFlags);
         parcel.writeInt(mountUserId);
         parcel.writeInt(state);
diff --git a/core/java/android/os/storage/VolumeRecord.java b/core/java/android/os/storage/VolumeRecord.java
index 096e2dd..cb16305 100644
--- a/core/java/android/os/storage/VolumeRecord.java
+++ b/core/java/android/os/storage/VolumeRecord.java
@@ -39,6 +39,7 @@ public class VolumeRecord implements Parcelable {
 
     public final int type;
     public final String fsUuid;
+    public String partGuid;
     public String nickname;
     public int userFlags;
 
@@ -50,6 +51,7 @@ public class VolumeRecord implements Parcelable {
     public VolumeRecord(Parcel parcel) {
         type = parcel.readInt();
         fsUuid = parcel.readString();
+        partGuid = parcel.readString();
         nickname = parcel.readString();
         userFlags = parcel.readInt();
     }
@@ -79,6 +81,8 @@ public class VolumeRecord implements Parcelable {
         pw.increaseIndent();
         pw.printPair("type", DebugUtils.valueToString(VolumeInfo.class, "TYPE_", type));
         pw.printPair("fsUuid", fsUuid);
+        pw.printPair("partGuid", partGuid);
+        pw.println();
         pw.printPair("nickname", nickname);
         pw.printPair("userFlags",
                 DebugUtils.flagsToString(VolumeRecord.class, "USER_FLAG_", userFlags));
@@ -133,6 +137,7 @@ public class VolumeRecord implements Parcelable {
     public void writeToParcel(Parcel parcel, int flags) {
         parcel.writeInt(type);
         parcel.writeString(fsUuid);
+        parcel.writeString(partGuid);
         parcel.writeString(nickname);
         parcel.writeInt(userFlags);
     }
diff --git a/core/java/android/text/TextUtils.java b/core/java/android/text/TextUtils.java
index d51aa79..d8f7158 100644
--- a/core/java/android/text/TextUtils.java
+++ b/core/java/android/text/TextUtils.java
@@ -465,6 +465,11 @@ public class TextUtils {
             return false;
     }
 
+    /** {@hide} */
+    public static String nullIfEmpty(@Nullable String str) {
+        return isEmpty(str) ? null : str;
+    }
+
     /**
      * Returns the length that the specified CharSequence would have if
      * spaces and control characters were trimmed from the start and end,