Added initial cut at miniIMFS which leaves out memfile and directory

readdir support.  The next step is to add a mount table and configure
either the miniIMFS or the full IMFS at the application level.

1 files changed, 90 insertions, 0 deletions

diff --git a/cpukit/libfs/src/imfs/imfs_fsunmount.c b/cpukit/libfs/src/imfs/imfs_fsunmount.c
new file mode 100644
index 0000000000..aa41b6c454
--- /dev/null
+++ b/cpukit/libfs/src/imfs/imfs_fsunmount.c
@@ -0,0 +1,90 @@
+/*
+ *  IMFS Initialization
+ *
+ *  COPYRIGHT (c) 1989-1998.
+ *  On-Line Applications Research Corporation (OAR).
+ *  Copyright assigned to U.S. Government, 1994.
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.OARcorp.com/rtems/license.html.
+ *
+ *  $Id$
+ */
+
+#include <sys/types.h>         /* for mkdir */
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+#include <assert.h>
+
+#include "imfs.h"
+#include "libio_.h"
+
+#if defined(IMFS_DEBUG)
+#include <stdio.h>
+#endif
+
+/*
+ *  IMFS_fsunmount
+ */
+
+#define jnode_get_control( jnode ) \
+  (&jnode->info.directory.Entries)
+
+#define jnode_has_no_children( jnode )  \
+  Chain_Is_empty( jnode_get_control( jnode ) )
+
+#define jnode_has_children( jnode ) \
+  ( ! jnode_has_no_children( jnode ) )
+
+#define jnode_get_first_child( jnode ) \
+    ((IMFS_jnode_t *)( Chain_Head( jnode_get_control( jnode ) )->next))
+
+
+int IMFS_fsunmount(
+  rtems_filesystem_mount_table_entry_t *temp_mt_entry
+)
+{
+   IMFS_jnode_t                     *jnode;
+   IMFS_jnode_t                     *next;
+   rtems_filesystem_location_info_t loc;       
+   int                              result = 0;
+
+   /* 
+    * Traverse tree that starts at the mt_fs_root and deallocate memory 
+    * associated memory space
+    */
+    
+   jnode = (IMFS_jnode_t *)temp_mt_entry->mt_fs_root.node_access;
+
+   do {
+     next = jnode->Parent;
+     loc.node_access = (void *)jnode;
+
+     if ( jnode->type != IMFS_DIRECTORY ) {
+        result = IMFS_unlink( &loc );
+        if (result != 0)
+          return -1;
+        jnode = next;
+     } else if ( jnode_has_no_children( jnode ) ) {
+        result = IMFS_unlink( &loc );
+        if (result != 0)
+          return -1;
+        jnode = next;
+     }
+     if ( jnode != NULL ) {
+       if ( jnode->type == IMFS_DIRECTORY ) {
+         if ( jnode_has_children( jnode ) )
+           jnode = jnode_get_first_child( jnode );
+       }
+     }
+   } while (jnode != NULL);
+
+   return 0;
+}
+
+
+
+