xref: /netbsd-src/external/bsd/am-utils/dist/amd/amfs_direct.c (revision 8bae5d409deb915cf7c8f0539fae22ff2cb8a313)

/*	$NetBSD: amfs_direct.c,v 1.1.1.3 2015/01/17 16:34:15 christos Exp $	*/

/*
 * Copyright (c) 1997-2014 Erez Zadok
 * Copyright (c) 1990 Jan-Simon Pendry
 * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Jan-Simon Pendry at Imperial College, London.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *
 * File: am-utils/amd/amfs_direct.c
 *
 */

/*
 * Direct file system
 */

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif /* HAVE_CONFIG_H */
#include <am_defs.h>
#include <amd.h>

/****************************************************************************
 *** FORWARD DEFINITIONS                                                  ***
 ****************************************************************************/
static am_node *amfs_direct_readlink(am_node *mp, int *error_return);

/****************************************************************************
 *** OPS STRUCTURES                                                       ***
 ****************************************************************************/
am_ops amfs_direct_ops =
{
  "direct",
  amfs_generic_match,
  0,				/* amfs_direct_init */
  amfs_toplvl_mount,
  amfs_toplvl_umount,
  amfs_generic_lookup_child,
  amfs_generic_mount_child,
  amfs_error_readdir,
  amfs_direct_readlink,
  amfs_generic_mounted,
  0,				/* amfs_direct_umounted */
  amfs_generic_find_srvr,
  0,				/* amfs_direct_get_wchan */
  FS_DIRECT | FS_MKMNT | FS_NOTIMEOUT | FS_BACKGROUND | FS_AMQINFO,
#ifdef HAVE_FS_AUTOFS
  AUTOFS_DIRECT_FS_FLAGS,
#endif /* HAVE_FS_AUTOFS */
};


/****************************************************************************
 *** FUNCTIONS                                                             ***
 ****************************************************************************/

static am_node *
amfs_direct_readlink(am_node *mp, int *error_return)
{
  am_node *xp;
  int rc = 0;

  xp = next_nonerror_node(mp->am_child);
  if (!xp) {
    if (!mp->am_al->al_mnt->mf_private)
      amfs_mkcacheref(mp->am_al->al_mnt);
    xp = amfs_generic_lookup_child(mp, mp->am_path + 1, &rc, VLOOK_CREATE);
    if (xp && rc < 0)
      xp = amfs_generic_mount_child(xp, &rc);
  }
  if (xp) {
    new_ttl(xp);		/* (7/12/89) from Rein Tollevik */
    return xp;
  }
  if (amd_state == Finishing)
    rc = ENOENT;
  *error_return = rc;
  return 0;
}