1 files changed, 127 insertions, 0 deletions
diff --git a/libtreefs/fsys.c b/libtreefs/fsys.c
new file mode 100644
index 00000000..459d0d3b
--- /dev/null
+++ b/libtreefs/fsys.c
@@ -0,0 +1,127 @@
+/*
+
+   Copyright (C) 1995 Free Software Foundation, Inc.
+
+   Written by Miles Bader <miles@gnu.ai.mit.edu>
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "treefs.h"
+
+/* ---------------------------------------------------------------- */
+
+/* Create a basic node, with one reference and no user-specific fields
+   initialized, and return it in NODE */
+error_t
+treefs_create_node (struct treefs_fsys *fsys, struct treefs_node **node)
+{
+  struct treefs_node *n = malloc (sizeof (struct treefs_node));
+
+  if (n == NULL)
+    return ENOMEM;
+
+  n->fsys = fsys;
+  n->refs = 1;
+  n->light_refs = 0;
+  n->hooks = fsys->hooks;
+  n->children = NULL;
+  n->u = NULL;
+  mutex_init (&n->lock);
+  fshelp_init_trans_link (&n->active_trans);
+  fshelp_lock_init (&n->lock_box);
+
+  *node = n;
+  return 0;
+}
+
+/* Immediately destroy NODE, with no user-finalization.  */
+error_t
+treefs_free_node (struct treefs_node *node)
+{
+  free (node);
+}
+
+/* ---------------------------------------------------------------- */
+
+/* Returns a new filesystem in FSYS.  */
+error_t
+treefs_create_fsys (struct port_bucket *port_bucket,
+		    treefs_hook_vector_t hook_overrides,
+		    struct treefs_fsys **fsys)
+{
+  treefs_hook_vector_t hooks = treefs_default_hooks;
+
+  if (hook_overrides)
+    {
+      hooks = treefs_hooks_clone (hooks);
+      treefs_hooks_override (hooks,  hooks_overrides);
+    }
+
+  *fsys =
+    ports_allocate_port (port_bucket, sizeof (struct trivfs_control),
+			 treefs_fsys_port_class);
+  if (*fsys == NULL)
+    return ENOMEM;
+
+  mutex_init (&(*fsys)->lock);
+  (*fsys)->root = NULL;
+
+  (*fsys)->underlying_port = MACH_PORT_NULL;
+  bzero (&(*fsys)->underlying_stat, sizeof (struct stat));
+
+  (*fsys)->flags = treefs_default_flags;
+  (*fsys)->max_symlinks = treefs_default_max_symlinks;
+  (*fsys)->sync_interval = treefs_default_sync_interval;
+
+  (*fsys)->fs_type = treefs_default_fsys_type;
+  (*fsys)->fs_id = getpid();
+
+  (*fsys)->hooks = hooks;
+
+  (*fsys)->port_bucket = port_bucket;
+  (*fsys)->protid_ports_class = treefs_protid_port_class;
+
+  (*fsys)->u = NULL;
+
+  return 0;
+}
+
+
+void ACKACKACK()
+{
+  /* Create a fake root node to bootstrap the filesystem.  */
+  err = treefs_create_node(*fsys, &fake_root);
+  if (err)
+    goto barf;
+
+  /* Remember stat info for the node we're mounted on.  */
+  bzero (&(*fsys)->underlying_stat, sizeof (struct stat));
+  file_stat (realnode, &(*fsys)->underlying_stat);
+
+  /* Note that it points to *FSYS, but *FSYS's root doesn't point to it...
+     If the user wants this to be the real root, it's his responsility to
+     initialize if further and install it.  */
+  fake_root->fsys = *fsys;
+  bcopy (&(*fsys)->underlying_stat, &fake_root->stat);
+  err = treefs_fsys_init (fake_root);
+  if (err)
+    goto barf;
+
+  /* See if the silly user has in fact done so.  */
+  if ((*fsys)->root != fake_root)
+    treefs_free_node (fake_root);
+}