am 6864b7ec: Change the cryptfs command to separate out checking the password and restarting

* commit '6864b7ec94a57b73c300457955d86dc604aeddf5':
  Change the cryptfs command to separate out checking the password and restarting

CommandListener.cpp

@@ -529,6 +529,12 @@ int CommandListener::CryptfsCmd::runCommand(SocketClient *cli,
             return 0;
         }
         rc = cryptfs_check_passwd(argv[2]);
+    } else if (!strcmp(argv[1], "restart")) {
+        if (argc != 2) {
+            cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: cryptfs restart", false);
+            return 0;
+        }
+        rc = cryptfs_restart();
     } else if (!strcmp(argv[1], "enablecrypto")) {
         if ( (argc != 4) || (strcmp(argv[2], "wipe") && strcmp(argv[2], "inplace")) ) {
             cli->sendMsg(ResponseCode::CommandSyntaxError, "Usage: cryptfs enablecrypto <wipe|inplace> <passwd>", false);

cryptfs.c

@@ -482,10 +482,11 @@ static int wait_and_unmount(char *mountpoint)
     return rc;
 }
 
-static int cryptfs_restart(char *crypto_blkdev)
+int cryptfs_restart(void)
 {
     char fs_type[32];
     char real_blkdev[MAXPATHLEN];
+    char crypto_blkdev[MAXPATHLEN];
     char fs_options[256];
     unsigned long mnt_flags;
     struct stat statbuf;
@@ -516,6 +517,12 @@ static int cryptfs_restart(char *crypto_blkdev)
      * the tmpfs filesystem, and mount the real one.
      */
 
+    property_get("ro.crypto.fs_crypto_blkdev", crypto_blkdev, "");
+    if (strlen(crypto_blkdev) == 0) {
+        SLOGE("fs_crypto_blkdev not set\n");
+        return -1;
+    }
+
     if (! get_orig_mount_parms("/data", fs_type, real_blkdev, &mnt_flags, fs_options)) {
         SLOGD("Just got orig mount parms\n");
 
@@ -622,10 +629,11 @@ static int test_mount_encrypted_fs(char *passwd, char *mount_point)
     rc = crypt_ftr.failed_decrypt_count;
 
   } else {
-    /* Woot!  Success!  Time to do the magic of unmounting the tmpfs
+    /* Woot!  Success!  Save the name of the crypto block device
-     * disk and mounting the encrypted one.
+     * so we can mount it when restarting the framework.
      */
-    rc = cryptfs_restart(crypto_blkdev);
+    property_set("ro.crypto.fs_crypto_blkdev", crypto_blkdev);
+    rc = 0;
   }
 
   return rc;

cryptfs.h

@@ -53,6 +53,7 @@ struct crypt_mnt_ftr {
 extern "C" {
 #endif
   int cryptfs_check_passwd(char *pw);
+  int cryptfs_restart(void);
   int cryptfs_enable(char *flag, char *passwd);
 #ifdef __cplusplus
 }