--- a/usr/src/lib/install_target/controller.py	Thu May 19 14:18:19 2011 -0700
+++ b/usr/src/lib/install_target/controller.py	Fri May 20 11:20:00 2011 -0600
@@ -548,6 +548,7 @@
             else:
                 new_slice = disk.add_slice("0", start, slice_size,
                     Size.sector_units)
+            new_slice.force = True
         else:
             # Compile a list of the usable slices, if any
             slice_list = list()
@@ -568,6 +569,7 @@
                 disk.delete_children(class_type=Slice)
                 new_slice = disk.add_slice("0", start, slice_size,
                     Size.sector_units)
+                new_slice.force = True
             else:
                 for partition in partitions:
                     if partition.is_solaris and disk.label == "VTOC":
@@ -589,6 +591,7 @@
                         partition.delete_children(class_type=Slice)
                         new_slice = partition.add_slice("0", start,
                             slice_size, Size.sector_units)
+                        new_slice.force = True
                         break
                 else:
                     return
@@ -1000,6 +1003,7 @@
                             Size.sector_units)
 
                         new_slice.tag = V_ROOT
+                        new_slice.force = True
 
                         if self._vdev is not None:
                             new_slice.in_vdev = self._vdev.name

--- a/usr/src/lib/install_target/logical.py	Thu May 19 14:18:19 2011 -0700
+++ b/usr/src/lib/install_target/logical.py	Fri May 20 11:20:00 2011 -0600
@@ -415,13 +415,20 @@
 
     @property
     def full_name(self):
-        """ keep a full_name attribute with the entire ZFS path for the
-        filesystem.  This is done because Filesystem objects can either be
-        created via Zpool.add_filesystem or by simple instantiation
-        (Filesystem("tank/fs"))
+        """ Keep a full_name attribute with the entire ZFS path for the
+        filesystem.  This is done because Filesystem objects can be created via
+        Zpool.add_filesystem, simple instantiation, or with the in_be attribute
+        set.
         """
         if self.parent is not None:
-            return os.path.join(self.parent.name, self.name)
+            if self.in_be:
+                # for in_be Filesystem objects, we need to get the BE and add
+                # it instead of the parent
+                be = self.parent.get_first_child(class_type=BE)
+                return os.path.join(self.parent.name, "ROOT", be.name,
+                                    self.name.lstrip("/"))
+            else:
+                return os.path.join(self.parent.name, self.name.lstrip("/"))
         else:
             return self.name
 
@@ -593,17 +600,18 @@
     def destroy(self, dry_run, snapshot=None, recursive=False):
         """ destroy the filesystem
         """
-        cmd = [ZFS, "destroy"]
-        if recursive:
-            cmd.append("-r")
-        if snapshot is not None:
-            cmd.append(self.snapname(snapshot))
-        else:
-            cmd.append(self.full_name)
+        if self.exists:
+            if not dry_run:
+                cmd = [ZFS, "destroy"]
+                if recursive:
+                    cmd.append("-r")
+                if snapshot is not None:
+                    cmd.append(self.snapname(snapshot))
+                else:
+                    cmd.append(self.full_name)
 
-        if not dry_run:
-            Popen.check_call(cmd, stdout=Popen.STORE, stderr=Popen.STORE,
-                             logger=ILN)
+                Popen.check_call(cmd, stdout=Popen.STORE, stderr=Popen.STORE,
+                                 logger=ILN)
 
     @property
     def exists(self):

--- a/usr/src/lib/install_target/shadow/physical.py	Thu May 19 14:18:19 2011 -0700
+++ b/usr/src/lib/install_target/shadow/physical.py	Fri May 20 11:20:00 2011 -0600
@@ -277,7 +277,7 @@
         # check for in_use conflicts.  Re-query libdiskmgt due to circular
         # import issues with trying to navigate the DOC
         stats = self.in_use_check(ctds)
-        if stats:
+        if stats and value.action != "preserve" and not value.force:
             self.set_error(self.SliceInUseError(stats))
 
         # insert the corrected Slice object
@@ -485,7 +485,7 @@
             # check for in_use conflicts.  Re-query libdiskmgt due to circular
             # import issues with trying to navigate the DOC
             stats = self.in_use_check(ctds)
-            if stats:
+            if stats and not value.force:
                 self.set_error(self.SliceInUseError(stats))
 
         # remove the object

--- a/usr/src/lib/install_target/test/test_shadow_list.py	Thu May 19 14:18:19 2011 -0700
+++ b/usr/src/lib/install_target/test/test_shadow_list.py	Fri May 20 11:20:00 2011 -0600
@@ -1562,3 +1562,11 @@
         error = errsvc._ERRORS[0]
         self.assertTrue(isinstance(error.error_data[ES_DATA_EXCEPTION],
             ShadowPhysical.SliceInUseError))
+
+    def test_force_delete_slice_in_use(self):
+        # the add slice will set an error, but we want to test delete.
+        s = self.disk.add_slice(self.index, 0, 1, Size.gb_units)
+        s.force = True
+        errsvc.clear_error_list()
+        s.delete()
+        self.assertFalse(errsvc._ERRORS)