xnu-792.13.8.tar.gz

[apple/xnu.git] / bsd / dev / vn / shadow.c

diff --git a/bsd/dev/vn/shadow.c b/bsd/dev/vn/shadow.c
index 20b78be748f5af50873ca6939ecf02d80df9edee..ecd540e6c2243ebf80ed7b4a4701dc9de17b0b65 100644 (file)
--- a/bsd/dev/vn/shadow.c
+++ b/bsd/dev/vn/shadow.c
@@ -2,26 +2,31 @@
 /*
  * Copyright (c) 2001 Apple Computer, Inc. All rights reserved.
  *
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
  * 
- * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
- * 
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
+ * This file contains Original Code and/or Modifications of Original Code 
+ * as defined in and that are subject to the Apple Public Source License 
+ * Version 2.0 (the 'License'). You may not use this file except in 
+ * compliance with the License.  The rights granted to you under the 
+ * License may not be used to create, or enable the creation or 
+ * redistribution of, unlawful or unlicensed copies of an Apple operating 
+ * system, or to circumvent, violate, or enable the circumvention or 
+ * violation of, any terms of an Apple operating system software license 
+ * agreement.
+ *
+ * Please obtain a copy of the License at 
+ * http://www.opensource.apple.com/apsl/ and read it before using this 
  * file.
- * 
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
+ *
+ * The Original Code and all software distributed under the License are 
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 
+ * Please see the License for the specific language governing rights and 
  * limitations under the License.
- * 
- * @APPLE_LICENSE_HEADER_END@
+ *
+ * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  */
 
 /*
@@ -61,11 +66,12 @@
 #include <stdlib.h>
 #define my_malloc(a)   malloc(a)
 #define my_free(a)     free(a)
-#else TEST_SHADOW
+#else /* !TEST_SHADOW */
 #include <sys/malloc.h>
 #define my_malloc(a)   _MALLOC(a, M_TEMP, M_WAITOK)
 #define my_free(a)     FREE(a, M_TEMP)
-#endif TEST_SHADOW
+#include <libkern/libkern.h>
+#endif /* TEST_SHADOW */
 
 #include "shadow.h"
 
@@ -292,7 +298,7 @@ bitmap_get(u_char * map, u_long start_bit, u_long bit_count,
     }
 
  end:
-    for (i = start.bit; i < end.bit; i++) {
+    for (i = start.bit; i < (int)end.bit; i++) {
        boolean_t this_is_set = (map[start.byte] & bit(i)) ? TRUE : FALSE;
        
        if (this_is_set != is_set) {
@@ -528,6 +534,15 @@ shadow_map_write(shadow_map_t * map, u_long block_offset,
     return (shadow_grew);
 }
 
+boolean_t
+shadow_map_is_written(shadow_map_t * map, u_long block_offset)
+{
+    bitmap_offset_t    b;
+
+    b = bitmap_offset(block_offset);
+    return ((map->block_bitmap[b.byte] & bit(b.bit)) ? TRUE : FALSE);
+}
+
 /*
  * Function: shadow_map_shadow_size
  *