Prepared struct node for stacks of shadow nodes

So far dynamic translator stacks were created in the following
fashion: nsmux created a shadow node on which the whole
dynamic translator stack was built. This commit starts the
transition to a different strategy: the new approach consists
in setting *each* dynamic translator on its personal shadow
node. To achieve such functionality the set of fiels of struct
node was modified and the bits of code that manipulated these
fields were stripped out. The code is not functional now. The
coming commits will bring it back to life.

1 files changed, 6 insertions, 59 deletions

diff --git a/nsmux.c b/nsmux.c
index 459e03a1e..8017781d9 100644
--- a/nsmux.c
+++ b/nsmux.c
@@ -551,9 +551,6 @@ error_t
   /*The port to the requested file */
   mach_port_t p;
 
-  /*The port to the untranslated version of the requested file */
-  mach_port_t p_notrans;
-
   /*The lnode corresponding to the entry we are supposed to fetch */
   lnode_t *lnode;
 
@@ -591,8 +588,6 @@ error_t
 	/*If there is some port, free it */
 	if (p != MACH_PORT_NULL)
 	  PORT_DEALLOC (p);
-	if (p_notrans != MACH_PORT_NULL)
-	  PORT_DEALLOC (p_notrans);
       }
     /*If there is a node to return */
     if (*node)
@@ -645,19 +640,13 @@ error_t
 	    if (p == MACH_PORT_NULL)
 	      return EBADF;
 
-	    /*obtain the untranslated version of the file, too (for filters) */
-	    p_notrans = file_name_lookup_under
-	      (dir->nn->port, name, O_NOTRANS, 0);
-	    if (p_notrans == MACH_PORT_NULL)
-	      return EBADF;
-
 	    /*If a proxy node is not required */
 	    if (!proxy)
 	      /*stop here, we want only the port to the file */
 	      return 0;
 	  }
 	else
-	    p = p_notrans = MACH_PORT_NULL;
+	    p = MACH_PORT_NULL;
       }
     else
       {
@@ -667,18 +656,12 @@ error_t
 	      (dir->nn->port, name, flags | O_READ | O_DIRECTORY, 0);
 	    if (p == MACH_PORT_NULL)
 	      return EBADF;		/*not enough rights? */
-
-	    /*obtain the untranslated version of the file, too (for filters) */
-	    p_notrans = file_name_lookup_under
-	      (dir->nn->port, name, O_NOTRANS, 0);
-	    if (p_notrans == MACH_PORT_NULL)
-	      return EBADF;
 	  }
 	else
 	  /*If we are at the last component of the path and need to
 	    open a directory, do not do the lookup; the translator
 	    starting procedure will do that.*/
-	  p = p_notrans = MACH_PORT_NULL;
+	  p =MACH_PORT_NULL;
 
 	/*we have a directory here */
 	isdir = 1;
@@ -726,9 +709,8 @@ error_t
 	return err;
       }
 
-    /*Store the ports in the node */
+    /*Store the port in the node */
     (*node)->nn->port = p;
-    (*node)->nn->port_notrans = p_notrans;
 
     /*Fill in the flag about the node being a directory */
     if (isdir)
@@ -866,12 +848,6 @@ error_t
       ++ntrans;
       ++translen;
 
-      /*copy the list of translators we have just built in the new
-	proxy node */
-      (*node)->nn->trans = trans;
-      (*node)->nn->ntrans = ntrans;
-      (*node)->nn->translen = translen;
-
       /*we don't own the list of translators any more */
       trans = NULL;
       ntrans = 0;
@@ -1047,21 +1023,8 @@ error_t
 		/*just return the port */
 		goto justport;
 
-	      /*If a proxy for setting up translators has just been created */
-	      if (np->nn->trans)
-		{
-		  /*set the list of translators on this node */
-		  node_set_translators
-		    (diruser, np, np->nn->trans, np->nn->ntrans, flags,
-		     filename, &file);
-
-		  /*lock the the node and add a new reference */
-		  mutex_lock (&np->lock);
-		  netfs_nref (np);
-
-		  /*return `file` as the resulting port */
-		  goto justport;
-		}
+	      /*If a shadow node has just been created, set the
+		required translator on it */
 	    }
 	}
 
@@ -1629,23 +1592,7 @@ kern_return_t
   /*If the node is not the root node of nsmux */
   if (np != netfs_root_node)
     {
-      /*the control port to the translator sitting on the real node */
-      mach_port_t p;
-
-      /*obtain the control port for the translator sitting on the real node;
-         provide the bottommost translator, so that the filter (and this is
-         most probably a request of such a translator) should be able to trace
-         the real translator stack */
-      err = file_get_translator_cntl (np->nn->port_notrans, &p);
-      if (err)
-	return err;
-
-      /*set the parameters accordingly */
-      *cntltype = MACH_MSG_TYPE_MOVE_SEND;
-      *cntl = p;
-
-      /*return the result of operations */
-      return err;
+      /*TODO: The functionality here will be provided later */
     }
 
   /*Lock the node */