xref: /netbsd/lib/libpuffs/pnode.c (revision 6550d01e)
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/cdefs.h>
29 #if !defined(lint)
30 __RCSID("$NetBSD: pnode.c,v 1.10 2008/08/12 19:44:39 pooka Exp $");
31 #endif /* !lint */
32 
33 #include <sys/types.h>
34 
35 #include <assert.h>
36 #include <puffs.h>
37 #include <stdlib.h>
38 #include <stdio.h>
39 #include <string.h>
40 
41 #include "puffs_priv.h"
42 
43 /*
44  * Well, you're probably wondering why this isn't optimized.
45  * The reason is simple: my available time is not optimized for
46  * size ... so please be patient ;)
47  */
48 struct puffs_node *
49 puffs_pn_new(struct puffs_usermount *pu, void *privdata)
50 {
51 	struct puffs_node *pn;
52 
53 	pn = calloc(1, sizeof(struct puffs_node));
54 	if (pn == NULL)
55 		return NULL;
56 
57 	pn->pn_data = privdata;
58 	pn->pn_mnt = pu;
59 	puffs_vattr_null(&pn->pn_va);
60 
61 	LIST_INSERT_HEAD(&pu->pu_pnodelst, pn, pn_entries);
62 
63 	return pn;
64 }
65 
66 void
67 puffs_pn_remove(struct puffs_node *pn)
68 {
69 
70 	LIST_REMOVE(pn, pn_entries);
71 	pn->pn_flags |= PUFFS_NODE_REMOVED;
72 }
73 
74 void
75 puffs_pn_put(struct puffs_node *pn)
76 {
77 	struct puffs_usermount *pu = pn->pn_mnt;
78 
79 	pu->pu_pathfree(pu, &pn->pn_po);
80 	if ((pn->pn_flags & PUFFS_NODE_REMOVED) == 0)
81 		LIST_REMOVE(pn, pn_entries);
82 	free(pn);
83 }
84 
85 /* walk list, rv can be used either to halt or to return a value */
86 void *
87 puffs_pn_nodewalk(struct puffs_usermount *pu, puffs_nodewalk_fn fn, void *arg)
88 {
89 	struct puffs_node *pn_cur, *pn_next;
90 	void *rv;
91 
92 	pn_cur = LIST_FIRST(&pu->pu_pnodelst);
93 	while (pn_cur) {
94 		pn_next = LIST_NEXT(pn_cur, pn_entries);
95 		rv = fn(pu, pn_cur, arg);
96 		if (rv)
97 			return rv;
98 		pn_cur = pn_next;
99 	}
100 
101 	return NULL;
102 }
103 
104 struct vattr *
105 puffs_pn_getvap(struct puffs_node *pn)
106 {
107 
108 	return &pn->pn_va;
109 }
110 
111 void *
112 puffs_pn_getpriv(struct puffs_node *pn)
113 {
114 
115 	return pn->pn_data;
116 }
117 
118 void
119 puffs_pn_setpriv(struct puffs_node *pn, void *priv)
120 {
121 
122 	pn->pn_data = priv;
123 }
124 
125 struct puffs_pathobj *
126 puffs_pn_getpo(struct puffs_node *pn)
127 {
128 
129 	return &pn->pn_po;
130 }
131 
132 struct puffs_usermount *
133 puffs_pn_getmnt(struct puffs_node *pn)
134 {
135 
136 	return pn->pn_mnt;
137 }
138 
139 /* convenience / shortcut */
140 void *
141 puffs_pn_getmntspecific(struct puffs_node *pn)
142 {
143 
144 	return pn->pn_mnt->pu_privdata;
145 }
146 
147 /*
148  * newnode parameters
149  */
150 void
151 puffs_newinfo_setcookie(struct puffs_newinfo *pni, puffs_cookie_t cookie)
152 {
153 
154 	*pni->pni_cookie = cookie;
155 }
156 
157 void
158 puffs_newinfo_setvtype(struct puffs_newinfo *pni, enum vtype vt)
159 {
160 
161 	*pni->pni_vtype = vt;
162 }
163 
164 void
165 puffs_newinfo_setsize(struct puffs_newinfo *pni, voff_t size)
166 {
167 
168 	*pni->pni_size = size;
169 }
170 
171 void
172 puffs_newinfo_setrdev(struct puffs_newinfo *pni, dev_t rdev)
173 {
174 
175 	*pni->pni_rdev = rdev;
176 }
177