Try to free cache before giving up on install

Try to get installd to free up cache before giving up when there is too
little space free.

Bug: 7232123
Change-Id: Ie3c8ca8dfc190abbb9a29a7baee31f32e9de7d69

Author: kruton

core/java/com/android/internal/app/IMediaContainerService.aidl

@@ -36,4 +36,5 @@ interface IMediaContainerService {
     /** Return file system stats: [0] is total bytes, [1] is available bytes */
     long[] getFileSystemStats(in String path);
     void clearDirectory(in String directory);
+    long calculateInstalledSize(in String packagePath, boolean isForwardLocked);
 }

packages/DefaultContainerService/src/com/android/defcontainer/DefaultContainerService.java

@@ -259,6 +259,21 @@ public void clearDirectory(String path) throws RemoteException {
                 eraseFiles(directory);
             }
         }
+
+        @Override
+        public long calculateInstalledSize(String packagePath, boolean isForwardLocked)
+                throws RemoteException {
+            final File packageFile = new File(packagePath);
+            try {
+                return calculateContainerSize(packageFile, isForwardLocked) * 1024 * 1024;
+            } catch (IOException e) {
+                /*
+                 * Okay, something failed, so let's just estimate it to be 2x
+                 * the file size. Note this will be 0 if the file doesn't exist.
+                 */
+                return packageFile.length() * 2;
+            }
+        }
     };
 
     public DefaultContainerService() {

services/java/com/android/server/pm/PackageManagerService.java

@@ -6330,8 +6330,23 @@ public void handleStartCopy() throws RemoteException {
 
                     if (packageFile != null) {
                         // Remote call to find out default install location
-                        pkgLite = mContainerService.getMinimalPackageInfo(
-                                packageFile.getAbsolutePath(), flags, lowThreshold);
+                        final String packageFilePath = packageFile.getAbsolutePath();
+                        pkgLite = mContainerService.getMinimalPackageInfo(packageFilePath, flags,
+                                lowThreshold);
+
+                        /*
+                         * If we have too little free space, try to free cache
+                         * before giving up.
+                         */
+                        if (pkgLite.recommendedInstallLocation
+                                == PackageHelper.RECOMMEND_FAILED_INSUFFICIENT_STORAGE) {
+                            final long size = mContainerService.calculateInstalledSize(
+                                    packageFilePath, isForwardLocked());
+                            if (mInstaller.freeCache(size + lowThreshold) >= 0) {
+                                pkgLite = mContainerService.getMinimalPackageInfo(packageFilePath,
+                                        flags, lowThreshold);
+                            }
+                        }
                     }
                 } finally {
                     mContext.revokeUriPermission(mPackageURI,