Home | History | Annotate | Line # | Download | only in amd
amfs_direct.c revision 1.1.1.2 
      1 /*	$NetBSD: amfs_direct.c,v 1.1.1.2 2009/03/20 20:26:48 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1997-2009 Erez Zadok
      5  * Copyright (c) 1990 Jan-Simon Pendry
      6  * Copyright (c) 1990 Imperial College of Science, Technology & Medicine
      7  * Copyright (c) 1990 The Regents of the University of California.
      8  * All rights reserved.
      9  *
     10  * This code is derived from software contributed to Berkeley by
     11  * Jan-Simon Pendry at Imperial College, London.
     12  *
     13  * Redistribution and use in source and binary forms, with or without
     14  * modification, are permitted provided that the following conditions
     15  * are met:
     16  * 1. Redistributions of source code must retain the above copyright
     17  *    notice, this list of conditions and the following disclaimer.
     18  * 2. Redistributions in binary form must reproduce the above copyright
     19  *    notice, this list of conditions and the following disclaimer in the
     20  *    documentation and/or other materials provided with the distribution.
     21  * 3. All advertising materials mentioning features or use of this software
     22  *    must display the following acknowledgment:
     23  *      This product includes software developed by the University of
     24  *      California, Berkeley and its contributors.
     25  * 4. Neither the name of the University nor the names of its contributors
     26  *    may be used to endorse or promote products derived from this software
     27  *    without specific prior written permission.
     28  *
     29  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     30  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     31  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     32  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     33  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     34  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     35  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     36  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     37  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     38  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     39  * SUCH DAMAGE.
     40  *
     41  *
     42  * File: am-utils/amd/amfs_direct.c
     43  *
     44  */
     45 
     46 /*
     47  * Direct file system
     48  */
     49 
     50 #ifdef HAVE_CONFIG_H
     51 # include <config.h>
     52 #endif /* HAVE_CONFIG_H */
     53 #include <am_defs.h>
     54 #include <amd.h>
     55 
     56 /****************************************************************************
     57  *** FORWARD DEFINITIONS                                                  ***
     58  ****************************************************************************/
     59 static am_node *amfs_direct_readlink(am_node *mp, int *error_return);
     60 
     61 /****************************************************************************
     62  *** OPS STRUCTURES                                                       ***
     63  ****************************************************************************/
     64 am_ops amfs_direct_ops =
     65 {
     66   "direct",
     67   amfs_generic_match,
     68   0,				/* amfs_direct_init */
     69   amfs_toplvl_mount,
     70   amfs_toplvl_umount,
     71   amfs_generic_lookup_child,
     72   amfs_generic_mount_child,
     73   amfs_error_readdir,
     74   amfs_direct_readlink,
     75   amfs_generic_mounted,
     76   0,				/* amfs_direct_umounted */
     77   amfs_generic_find_srvr,
     78   0,				/* amfs_direct_get_wchan */
     79   FS_DIRECT | FS_MKMNT | FS_NOTIMEOUT | FS_BACKGROUND | FS_AMQINFO,
     80 #ifdef HAVE_FS_AUTOFS
     81   AUTOFS_DIRECT_FS_FLAGS,
     82 #endif /* HAVE_FS_AUTOFS */
     83 };
     84 
     85 
     86 /****************************************************************************
     87  *** FUNCTIONS                                                             ***
     88  ****************************************************************************/
     89 
     90 static am_node *
     91 amfs_direct_readlink(am_node *mp, int *error_return)
     92 {
     93   am_node *xp;
     94   int rc = 0;
     95 
     96   xp = next_nonerror_node(mp->am_child);
     97   if (!xp) {
     98     if (!mp->am_mnt->mf_private)
     99       amfs_mkcacheref(mp->am_mnt);	/* XXX */
    100     xp = amfs_generic_lookup_child(mp, mp->am_path + 1, &rc, VLOOK_CREATE);
    101     if (xp && rc < 0)
    102       xp = amfs_generic_mount_child(xp, &rc);
    103   }
    104   if (xp) {
    105     new_ttl(xp);		/* (7/12/89) from Rein Tollevik */
    106     return xp;
    107   }
    108   if (amd_state == Finishing)
    109     rc = ENOENT;
    110   *error_return = rc;
    111   return 0;
    112 }
    113