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 * 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 69 puffs_pn_remove(struct puffs_node *pn) 70 { 71 struct puffs_usermount *pu = pn->pn_mnt; 72 assert(pu != NULL); 73 74 LIST_REMOVE(pn, pn_entries); 75 pn->pn_flags |= PUFFS_NODE_REMOVED; 76 if (pn->pn_count != 0) { 77 /* XXX FS removes this pn from the list to prevent further 78 * lookups from finding node after remove/rm/rename op. 79 * But VFS still uses it, i.e. pnode is still open, and 80 * will put it later. Keep it in separate list to do reclaim 81 * in fs_put(). 82 */ 83 LIST_INSERT_HEAD(&pu->pu_pnode_removed_lst, pn, pn_entries); 84 } 85 } 86 87 void 88 puffs_pn_put(struct puffs_node *pn) 89 { 90 struct puffs_usermount *pu = pn->pn_mnt; 91 92 pu->pu_pathfree(pu, &pn->pn_po); 93 if ((pn->pn_flags & PUFFS_NODE_REMOVED) == 0) 94 LIST_REMOVE(pn, pn_entries); 95 free(pn); 96 } 97 98 /* walk list, rv can be used either to halt or to return a value 99 * XXX (MINIX note): if fn is 0, then arg is ino_t and we search 100 * node with ino_t. TODO: modify docs. 101 */ 102 void * 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 if (fn) { 112 rv = fn(pu, pn_cur, arg); 113 if (rv) 114 return rv; 115 } else { 116 if (pn_cur->pn_va.va_fileid == *((ino_t*) arg)) 117 return pn_cur; 118 } 119 pn_cur = pn_next; 120 } 121 122 return NULL; 123 } 124 125 struct vattr * 126 puffs_pn_getvap(struct puffs_node *pn) 127 { 128 129 return &pn->pn_va; 130 } 131 132 void * 133 puffs_pn_getpriv(struct puffs_node *pn) 134 { 135 136 return pn->pn_data; 137 } 138 139 void 140 puffs_pn_setpriv(struct puffs_node *pn, void *priv) 141 { 142 143 pn->pn_data = priv; 144 } 145 146 struct puffs_pathobj * 147 puffs_pn_getpo(struct puffs_node *pn) 148 { 149 150 return &pn->pn_po; 151 } 152 153 struct puffs_usermount * 154 puffs_pn_getmnt(struct puffs_node *pn) 155 { 156 157 return pn->pn_mnt; 158 } 159 160 /* convenience / shortcut */ 161 void * 162 puffs_pn_getmntspecific(struct puffs_node *pn) 163 { 164 165 return pn->pn_mnt->pu_privdata; 166 } 167 168 /* 169 * newnode parameters 170 */ 171 void 172 puffs_newinfo_setcookie(struct puffs_newinfo *pni, puffs_cookie_t cookie) 173 { 174 175 *pni->pni_cookie = cookie; 176 } 177 178 void 179 puffs_newinfo_setvtype(struct puffs_newinfo *pni, enum vtype vt) 180 { 181 182 *pni->pni_vtype = vt; 183 } 184 185 void 186 puffs_newinfo_setsize(struct puffs_newinfo *pni, voff_t size) 187 { 188 189 *pni->pni_size = size; 190 } 191 192 void 193 puffs_newinfo_setrdev(struct puffs_newinfo *pni, dev_t rdev) 194 { 195 196 *pni->pni_rdev = rdev; 197 } 198 199 void 200 puffs_newinfo_setva(struct puffs_newinfo *pni, struct vattr *va) 201 { 202 203 (void)memcpy(pni->pni_va, va, sizeof(struct vattr)); 204 } 205 206 void 207 puffs_newinfo_setvattl(struct puffs_newinfo *pni, struct timespec *va_ttl) 208 { 209 210 pni->pni_va_ttl->tv_sec = va_ttl->tv_sec; 211 pni->pni_va_ttl->tv_nsec = va_ttl->tv_nsec; 212 } 213 214 void 215 puffs_newinfo_setcnttl(struct puffs_newinfo *pni, struct timespec *cn_ttl) 216 { 217 218 pni->pni_cn_ttl->tv_sec = cn_ttl->tv_sec; 219 pni->pni_cn_ttl->tv_nsec = cn_ttl->tv_nsec; 220 } 221 222