imfs: Untangle dependencies

This helps to use IMFS_make_generic_node() without pulling in the
complete IMFS implementation.

1 files changed, 115 insertions, 0 deletions

diff --git a/cpukit/libfs/src/imfs/imfs_node.c b/cpukit/libfs/src/imfs/imfs_node.c
new file mode 100644
index 0000000000..5dd22c1542
--- /dev/null
+++ b/cpukit/libfs/src/imfs/imfs_node.c
@@ -0,0 +1,115 @@
+/**
+ * @file
+ *
+ * @brief IMFS Node Support
+ * @ingroup IMFS
+ */
+
+/*
+ *  COPYRIGHT (c) 1989-1999.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  Modifications to support reference counting in the file system are
+ *  Copyright (c) 2012 embedded brains GmbH.
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.org/license/LICENSE.
+ */
+
+#if HAVE_CONFIG_H
+  #include "config.h"
+#endif
+
+#include "imfs.h"
+
+#include <stdlib.h>
+
+IMFS_jnode_t *IMFS_initialize_node(
+  IMFS_jnode_t *node,
+  const IMFS_node_control *node_control,
+  const char *name,
+  size_t namelen,
+  mode_t mode,
+  void *arg
+)
+{
+  struct timeval tv;
+
+  if ( namelen > IMFS_NAME_MAX ) {
+    errno = ENAMETOOLONG;
+
+    return NULL;
+  }
+
+  gettimeofday( &tv, 0 );
+
+  /*
+   *  Fill in the basic information
+   */
+  node->name = name;
+  node->namelen = namelen;
+  node->reference_count = 1;
+  node->st_nlink = 1;
+  node->control = node_control;
+
+  /*
+   *  Fill in the mode and permission information for the jnode structure.
+   */
+  node->st_mode = mode;
+  node->st_uid = geteuid();
+  node->st_gid = getegid();
+
+  /*
+   *  Now set all the times.
+   */
+
+  node->stat_atime  = (time_t) tv.tv_sec;
+  node->stat_mtime  = (time_t) tv.tv_sec;
+  node->stat_ctime  = (time_t) tv.tv_sec;
+
+  return (*node_control->node_initialize)( node, arg );
+}
+
+int IMFS_node_clone( rtems_filesystem_location_info_t *loc )
+{
+  IMFS_jnode_t *node = loc->node_access;
+
+  ++node->reference_count;
+
+  return 0;
+}
+
+void IMFS_node_destroy( IMFS_jnode_t *node )
+{
+  IMFS_assert( node->reference_count == 0 );
+
+  (*node->control->node_destroy)( node );
+}
+
+void IMFS_node_free( const rtems_filesystem_location_info_t *loc )
+{
+  IMFS_jnode_t *node = loc->node_access;
+
+  --node->reference_count;
+
+  if ( node->reference_count == 0 ) {
+    IMFS_node_destroy( node );
+  }
+}
+
+IMFS_jnode_t *IMFS_node_remove_default(
+  IMFS_jnode_t *node
+)
+{
+  return node;
+}
+
+void IMFS_node_destroy_default( IMFS_jnode_t *node )
+{
+  if ( ( node->flags & IMFS_NODE_FLAG_NAME_ALLOCATED ) != 0 ) {
+    free( RTEMS_DECONST( char *, node->name ) );
+  }
+
+  free( node );
+}