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 #if defined(__minix) 43 #include <minix/type.h> 44 #include "proto.h" 45 #endif /* defined(__minix) */ 46 47 /* 48 * Well, you're probably wondering why this isn't optimized. 49 * The reason is simple: my available time is not optimized for 50 * size ... so please be patient ;) 51 */ 52 struct puffs_node * 53 puffs_pn_new(struct puffs_usermount *pu, void *privdata) 54 { 55 struct puffs_node *pn; 56 57 pn = calloc(1, sizeof(struct puffs_node)); 58 if (pn == NULL) 59 return NULL; 60 61 pn->pn_data = privdata; 62 pn->pn_mnt = pu; 63 puffs_vattr_null(&pn->pn_va); 64 65 LIST_INSERT_HEAD(&pu->pu_pnodelst, pn, pn_entries); 66 67 pu->pu_flags |= PUFFS_FLAG_PNCOOKIE; 68 69 return pn; 70 } 71 72 void 73 puffs_pn_remove(struct puffs_node *pn) 74 { 75 struct puffs_usermount *pu = pn->pn_mnt; 76 assert(pu != NULL); 77 78 LIST_REMOVE(pn, pn_entries); 79 pn->pn_flags |= PUFFS_NODE_REMOVED; 80 if (pn->pn_count != 0) { 81 /* XXX FS removes this pn from the list to prevent further 82 * lookups from finding node after remove/rm/rename op. 83 * But VFS still uses it, i.e. pnode is still open, and 84 * will put it later. Keep it in separate list to do reclaim 85 * in fs_put(). 86 */ 87 LIST_INSERT_HEAD(&pu->pu_pnode_removed_lst, pn, pn_entries); 88 } 89 } 90 91 void 92 puffs_pn_put(struct puffs_node *pn) 93 { 94 struct puffs_usermount *pu = pn->pn_mnt; 95 96 pu->pu_pathfree(pu, &pn->pn_po); 97 if ((pn->pn_flags & PUFFS_NODE_REMOVED) == 0) 98 LIST_REMOVE(pn, pn_entries); 99 free(pn); 100 } 101 102 /* walk list, rv can be used either to halt or to return a value 103 * XXX (MINIX note): if fn is 0, then arg is ino_t and we search 104 * node with ino_t. TODO: modify docs. 105 */ 106 void * 107 puffs_pn_nodewalk(struct puffs_usermount *pu, puffs_nodewalk_fn fn, void *arg) 108 { 109 struct puffs_node *pn_cur, *pn_next; 110 void *rv; 111 112 pn_cur = LIST_FIRST(&pu->pu_pnodelst); 113 while (pn_cur) { 114 pn_next = LIST_NEXT(pn_cur, pn_entries); 115 if (fn) { 116 rv = fn(pu, pn_cur, arg); 117 if (rv) 118 return rv; 119 } else { 120 if (pn_cur->pn_va.va_fileid == *((ino_t*) arg)) 121 return pn_cur; 122 } 123 pn_cur = pn_next; 124 } 125 126 return NULL; 127 } 128 129 struct vattr * 130 puffs_pn_getvap(struct puffs_node *pn) 131 { 132 133 return &pn->pn_va; 134 } 135 136 void * 137 puffs_pn_getpriv(struct puffs_node *pn) 138 { 139 140 return pn->pn_data; 141 } 142 143 void 144 puffs_pn_setpriv(struct puffs_node *pn, void *priv) 145 { 146 147 pn->pn_data = priv; 148 } 149 150 struct puffs_pathobj * 151 puffs_pn_getpo(struct puffs_node *pn) 152 { 153 154 return &pn->pn_po; 155 } 156 157 struct puffs_usermount * 158 puffs_pn_getmnt(struct puffs_node *pn) 159 { 160 161 return pn->pn_mnt; 162 } 163 164 /* convenience / shortcut */ 165 void * 166 puffs_pn_getmntspecific(struct puffs_node *pn) 167 { 168 169 return pn->pn_mnt->pu_privdata; 170 } 171 172 /* 173 * newnode parameters 174 */ 175 void 176 puffs_newinfo_setcookie(struct puffs_newinfo *pni, puffs_cookie_t cookie) 177 { 178 179 *pni->pni_cookie = cookie; 180 } 181 182 void 183 puffs_newinfo_setvtype(struct puffs_newinfo *pni, enum vtype vt) 184 { 185 186 *pni->pni_vtype = vt; 187 } 188 189 void 190 puffs_newinfo_setsize(struct puffs_newinfo *pni, voff_t size) 191 { 192 193 *pni->pni_size = size; 194 } 195 196 void 197 puffs_newinfo_setrdev(struct puffs_newinfo *pni, dev_t rdev) 198 { 199 200 *pni->pni_rdev = rdev; 201 } 202 203 void 204 puffs_newinfo_setva(struct puffs_newinfo *pni, struct vattr *va) 205 { 206 207 (void)memcpy(pni->pni_va, va, sizeof(struct vattr)); 208 } 209 210 void 211 puffs_newinfo_setvattl(struct puffs_newinfo *pni, struct timespec *va_ttl) 212 { 213 214 pni->pni_va_ttl->tv_sec = va_ttl->tv_sec; 215 pni->pni_va_ttl->tv_nsec = va_ttl->tv_nsec; 216 } 217 218 void 219 puffs_newinfo_setcnttl(struct puffs_newinfo *pni, struct timespec *cn_ttl) 220 { 221 222 pni->pni_cn_ttl->tv_sec = cn_ttl->tv_sec; 223 pni->pni_cn_ttl->tv_nsec = cn_ttl->tv_nsec; 224 } 225 226