The object memfile.o was being included in the miniIMFS even though it

should not have been.  This required that IMFS_rmnod be split into
three separate (per file type) routines to avoid dependencies.
In the end, a miniIMFS application is 6K smaller than one using the
full IMFS.

1 files changed, 76 insertions, 0 deletions

diff --git a/c/src/exec/libfs/src/imfs/imfs_directory.c b/c/src/exec/libfs/src/imfs/imfs_directory.c
index fbf4ba53a3..89672ec9ae 100644
--- a/c/src/exec/libfs/src/imfs/imfs_directory.c
+++ b/c/src/exec/libfs/src/imfs/imfs_directory.c
@@ -269,4 +269,80 @@ int imfs_dir_fstat(
    return 0;
 }
 
+/*
+ *  IMFS_dir_rmnod
+ *
+ *  This routine is available from the optable to remove a node 
+ *  from the IMFS file system.
+ */
+
+int imfs_dir_rmnod(
+  rtems_filesystem_location_info_t      *pathloc       /* IN */
+)
+{
+  IMFS_jnode_t *the_jnode;  
+
+  the_jnode = (IMFS_jnode_t *) pathloc->node_access;
+
+  /* 
+   * You cannot remove a node that still has children 
+   */
+
+  if ( ! Chain_Is_empty( &the_jnode->info.directory.Entries ) )
+     set_errno_and_return_minus_one( ENOTEMPTY );
+
+  /* 
+   * You cannot remove the file system root node.
+   */
+
+  if ( pathloc->mt_entry->mt_fs_root.node_access == pathloc->node_access )
+     set_errno_and_return_minus_one( EBUSY );
+
+  /* 
+   * You cannot remove a mountpoint.
+   */
+
+   if ( the_jnode->info.directory.mt_fs != NULL )
+     set_errno_and_return_minus_one( EBUSY );          
+ 
+  /* 
+   * Take the node out of the parent's chain that contains this node 
+   */
+
+  if ( the_jnode->Parent != NULL ) {
+    Chain_Extract( (Chain_Node *) the_jnode );
+    the_jnode->Parent = NULL;
+  }
+
+  /*
+   * Decrement the link counter and see if we can free the space.
+   */
+
+  the_jnode->st_nlink--;
+  IMFS_update_ctime( the_jnode );
+
+  /*
+   * The file cannot be open and the link must be less than 1 to free.
+   */
+
+  if ( !rtems_libio_is_file_open( the_jnode ) && (the_jnode->st_nlink < 1) ) {
+
+    /* 
+     * Is the rtems_filesystem_current is this node?
+     */
+
+    if ( rtems_filesystem_current.node_access == pathloc->node_access )
+       rtems_filesystem_current.node_access = NULL;
+
+    /*
+     * Free memory associated with a memory file.
+     */
+
+    free( the_jnode );
+  }
+
+  return 0;
+
+}
+