1 files changed, 23 insertions, 1 deletions

diff --git a/ufs/main.c b/ufs/main.c
index ee0e2268..5fd1ff11 100644
--- a/ufs/main.c
+++ b/ufs/main.c
@@ -98,7 +98,6 @@ main (int argc, char **argv)
   error_t err;
   int sizes[DEV_GET_SIZE_COUNT];
   u_int sizescnt = 2;
-
  
   save_argv = argv;
 
@@ -145,6 +144,29 @@ main (int argc, char **argv)
       exit (1);
     }
   
+  diskpagersize = sizes[DEV_GET_SIZE_DEVICE_SIZE];
+  assert (diskpagersize >= SBSIZE + SBOFF);
+
+  /* Map the entire disk. */
+  create_disk_pager ();
+
+  err = vm_map (mach_task_self (), (vm_address_t *)&disk_image,
+		diskpagersize, 0, 1, diskpagerport, 0, 0, 
+		VM_PROT_READ | (diskfs_readonly ? 0 : VM_PROT_WRITE),
+		VM_PROT_READ | (diskfs_readonly ? 0 : VM_PROT_WRITE), 
+		VM_INHERIT_NONE);
+  assert (!err);
+
+  if (diskpagersize < sblock->fs_size * sblock->fs_fsize)
+      {
+	fprintf (stderr, 
+		 "Disk size %d less than necessary "
+		 "(superblock says we need %ld)\n",
+		 sizes[DEV_GET_SIZE_DEVICE_SIZE],
+		 sblock->fs_size * sblock->fs_fsize);
+	exit (1);
+      }
+
   get_hypermetadata ();
 
   /* Check to make sure device size is big enough.  */