1 /* $NetBSD: pnode.c,v 1.13 2012/08/16 09:25:43 manu 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 1.13 2012/08/16 09:25:43 manu 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 *
puffs_pn_new(struct puffs_usermount * pu,void * privdata)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 pu->pu_flags |= PUFFS_FLAG_PNCOOKIE;
64
65 return pn;
66 }
67
68 void
puffs_pn_remove(struct puffs_node * pn)69 puffs_pn_remove(struct puffs_node *pn)
70 {
71
72 LIST_REMOVE(pn, pn_entries);
73 pn->pn_flags |= PUFFS_NODE_REMOVED;
74 #if defined(__minix)
75 if (pn->pn_count != 0) {
76 struct puffs_usermount *pu = pn->pn_mnt;
77 assert(pu != NULL);
78
79 /* XXX FS removes this pn from the list to prevent further
80 * lookups from finding node after remove/rm/rename op.
81 * But VFS still uses it, i.e. pnode is still open, and
82 * will put it later. Keep it in separate list to do reclaim
83 * in fs_put().
84 */
85 LIST_INSERT_HEAD(&pu->pu_pnode_removed_lst, pn, pn_entries);
86 }
87 #endif /* defined(__minix) */
88 }
89
90 void
puffs_pn_put(struct puffs_node * pn)91 puffs_pn_put(struct puffs_node *pn)
92 {
93 struct puffs_usermount *pu = pn->pn_mnt;
94
95 pu->pu_pathfree(pu, &pn->pn_po);
96 if ((pn->pn_flags & PUFFS_NODE_REMOVED) == 0)
97 LIST_REMOVE(pn, pn_entries);
98 free(pn);
99 }
100
101 /* walk list, rv can be used either to halt or to return a value */
102 void *
puffs_pn_nodewalk(struct puffs_usermount * pu,puffs_nodewalk_fn fn,void * arg)103 puffs_pn_nodewalk(struct puffs_usermount *pu, puffs_nodewalk_fn fn, void *arg)
104 {
105 struct puffs_node *pn_cur, *pn_next;
106 void *rv;
107
108 pn_cur = LIST_FIRST(&pu->pu_pnodelst);
109 while (pn_cur) {
110 pn_next = LIST_NEXT(pn_cur, pn_entries);
111 rv = fn(pu, pn_cur, arg);
112 if (rv)
113 return rv;
114 pn_cur = pn_next;
115 }
116
117 return NULL;
118 }
119
120 struct vattr *
puffs_pn_getvap(struct puffs_node * pn)121 puffs_pn_getvap(struct puffs_node *pn)
122 {
123
124 return &pn->pn_va;
125 }
126
127 void *
puffs_pn_getpriv(struct puffs_node * pn)128 puffs_pn_getpriv(struct puffs_node *pn)
129 {
130
131 return pn->pn_data;
132 }
133
134 void
puffs_pn_setpriv(struct puffs_node * pn,void * priv)135 puffs_pn_setpriv(struct puffs_node *pn, void *priv)
136 {
137
138 pn->pn_data = priv;
139 }
140
141 struct puffs_pathobj *
puffs_pn_getpo(struct puffs_node * pn)142 puffs_pn_getpo(struct puffs_node *pn)
143 {
144
145 return &pn->pn_po;
146 }
147
148 struct puffs_usermount *
puffs_pn_getmnt(struct puffs_node * pn)149 puffs_pn_getmnt(struct puffs_node *pn)
150 {
151
152 return pn->pn_mnt;
153 }
154
155 /* convenience / shortcut */
156 void *
puffs_pn_getmntspecific(struct puffs_node * pn)157 puffs_pn_getmntspecific(struct puffs_node *pn)
158 {
159
160 return pn->pn_mnt->pu_privdata;
161 }
162
163 /*
164 * newnode parameters
165 */
166 void
puffs_newinfo_setcookie(struct puffs_newinfo * pni,puffs_cookie_t cookie)167 puffs_newinfo_setcookie(struct puffs_newinfo *pni, puffs_cookie_t cookie)
168 {
169
170 *pni->pni_cookie = cookie;
171 }
172
173 void
puffs_newinfo_setvtype(struct puffs_newinfo * pni,enum vtype vt)174 puffs_newinfo_setvtype(struct puffs_newinfo *pni, enum vtype vt)
175 {
176
177 *pni->pni_vtype = vt;
178 }
179
180 void
puffs_newinfo_setsize(struct puffs_newinfo * pni,voff_t size)181 puffs_newinfo_setsize(struct puffs_newinfo *pni, voff_t size)
182 {
183
184 *pni->pni_size = size;
185 }
186
187 void
puffs_newinfo_setrdev(struct puffs_newinfo * pni,dev_t rdev)188 puffs_newinfo_setrdev(struct puffs_newinfo *pni, dev_t rdev)
189 {
190
191 *pni->pni_rdev = rdev;
192 }
193
194 void
puffs_newinfo_setva(struct puffs_newinfo * pni,struct vattr * va)195 puffs_newinfo_setva(struct puffs_newinfo *pni, struct vattr *va)
196 {
197
198 (void)memcpy(pni->pni_va, va, sizeof(struct vattr));
199 }
200
201 void
puffs_newinfo_setvattl(struct puffs_newinfo * pni,struct timespec * va_ttl)202 puffs_newinfo_setvattl(struct puffs_newinfo *pni, struct timespec *va_ttl)
203 {
204
205 pni->pni_va_ttl->tv_sec = va_ttl->tv_sec;
206 pni->pni_va_ttl->tv_nsec = va_ttl->tv_nsec;
207 }
208
209 void
puffs_newinfo_setcnttl(struct puffs_newinfo * pni,struct timespec * cn_ttl)210 puffs_newinfo_setcnttl(struct puffs_newinfo *pni, struct timespec *cn_ttl)
211 {
212
213 pni->pni_cn_ttl->tv_sec = cn_ttl->tv_sec;
214 pni->pni_cn_ttl->tv_nsec = cn_ttl->tv_nsec;
215 }
216
217