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/*
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);
}
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