lib/libpuffs/pnode.c

   1 /*      $NetBSD: pnode.c,v 1.10 2008/08/12 19:44:39 pooka Exp $ */
   2
   3 /*
   4  * Copyright (c) 2006 Antti Kantee.  All Rights Reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
  16  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  17  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  18  * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  21  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25  * SUCH DAMAGE.
  26  */
  27
  28 #include <sys/types.h>
  29
  30 #include <assert.h>
  31 #include <stdlib.h>
  32 #include <stdio.h>
  33 #include <string.h>
  34
  35 #include "puffs.h"
  36 #include "puffs_priv.h"
  37
  38 /*
  39  * Well, you're probably wondering why this isn't optimized.
  40  * The reason is simple: my available time is not optimized for
  41  * size ... so please be patient ;)
  42  */
  43 struct puffs_node *
  44 puffs_pn_new(struct puffs_usermount *pu, void *privdata)
  45 {
  46         struct puffs_node *pn;
  47
  48         pn = calloc(1, sizeof(struct puffs_node));
  49         if (pn == NULL)
  50                 return NULL;
  51
  52         pn->pn_data = privdata;
  53         pn->pn_mnt = pu;
  54         puffs_vattr_null(&pn->pn_va);
  55
  56         LIST_INSERT_HEAD(&pu->pu_pnodelst, pn, pn_entries);
  57
  58         return pn;
  59 }
  60
  61 void
  62 puffs_pn_remove(struct puffs_node *pn)
  63 {
  64
  65         LIST_REMOVE(pn, pn_entries);
  66         pn->pn_flags |= PUFFS_NODE_REMOVED;
  67 }
  68
  69 void
  70 puffs_pn_put(struct puffs_node *pn)
  71 {
  72         struct puffs_usermount *pu = pn->pn_mnt;
  73
  74         pu->pu_pathfree(pu, &pn->pn_po);
  75         if ((pn->pn_flags & PUFFS_NODE_REMOVED) == 0)
  76                 LIST_REMOVE(pn, pn_entries);
  77         free(pn);
  78 }
  79
  80 /* walk list, rv can be used either to halt or to return a value */
  81 void *
  82 puffs_pn_nodewalk(struct puffs_usermount *pu, puffs_nodewalk_fn fn, void *arg)
  83 {
  84         struct puffs_node *pn_cur, *pn_next;
  85         void *rv;
  86
  87         pn_cur = LIST_FIRST(&pu->pu_pnodelst);
  88         while (pn_cur) {
  89                 pn_next = LIST_NEXT(pn_cur, pn_entries);
  90                 rv = fn(pu, pn_cur, arg);
  91                 if (rv)
  92                         return rv;
  93                 pn_cur = pn_next;
  94         }
  95
  96         return NULL;
  97 }
  98
  99 struct vattr *
 100 puffs_pn_getvap(struct puffs_node *pn)
 101 {
 102
 103         return &pn->pn_va;
 104 }
 105
 106 void *
 107 puffs_pn_getpriv(struct puffs_node *pn)
 108 {
 109
 110         return pn->pn_data;
 111 }
 112
 113 void
 114 puffs_pn_setpriv(struct puffs_node *pn, void *priv)
 115 {
 116
 117         pn->pn_data = priv;
 118 }
 119
 120 struct puffs_pathobj *
 121 puffs_pn_getpo(struct puffs_node *pn)
 122 {
 123
 124         return &pn->pn_po;
 125 }
 126
 127 struct puffs_usermount *
 128 puffs_pn_getmnt(struct puffs_node *pn)
 129 {
 130
 131         return pn->pn_mnt;
 132 }
 133
 134 /* convenience / shortcut */
 135 void *
 136 puffs_pn_getmntspecific(struct puffs_node *pn)
 137 {
 138
 139         return pn->pn_mnt->pu_privdata;
 140 }
 141
 142 /*
 143  * newnode parameters
 144  */
 145 void
 146 puffs_newinfo_setcookie(struct puffs_newinfo *pni, puffs_cookie_t cookie)
 147 {
 148
 149         assert(pni->pni_cookie != NULL);
 150         *pni->pni_cookie = cookie;
 151 }
 152
 153 void
 154 puffs_newinfo_setvtype(struct puffs_newinfo *pni, enum vtype vt)
 155 {
 156
 157         if (pni->pni_vtype != NULL)
 158                 *pni->pni_vtype = vt;
 159 }
 160
 161 void
 162 puffs_newinfo_setsize(struct puffs_newinfo *pni, voff_t size)
 163 {
 164
 165         if (pni->pni_size != NULL)
 166                 *pni->pni_size = size;
 167 }