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 72 LIST_REMOVE(pn, pn_entries); 73 pn->pn_flags |= PUFFS_NODE_REMOVED; 74 #ifdef __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 /* __minix */ 88 } 89 90 void 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 * 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 * 121 puffs_pn_getvap(struct puffs_node *pn) 122 { 123 124 return &pn->pn_va; 125 } 126 127 void * 128 puffs_pn_getpriv(struct puffs_node *pn) 129 { 130 131 return pn->pn_data; 132 } 133 134 void 135 puffs_pn_setpriv(struct puffs_node *pn, void *priv) 136 { 137 138 pn->pn_data = priv; 139 } 140 141 struct puffs_pathobj * 142 puffs_pn_getpo(struct puffs_node *pn) 143 { 144 145 return &pn->pn_po; 146 } 147 148 struct puffs_usermount * 149 puffs_pn_getmnt(struct puffs_node *pn) 150 { 151 152 return pn->pn_mnt; 153 } 154 155 /* convenience / shortcut */ 156 void * 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 167 puffs_newinfo_setcookie(struct puffs_newinfo *pni, puffs_cookie_t cookie) 168 { 169 170 *pni->pni_cookie = cookie; 171 } 172 173 void 174 puffs_newinfo_setvtype(struct puffs_newinfo *pni, enum vtype vt) 175 { 176 177 *pni->pni_vtype = vt; 178 } 179 180 void 181 puffs_newinfo_setsize(struct puffs_newinfo *pni, voff_t size) 182 { 183 184 *pni->pni_size = size; 185 } 186 187 void 188 puffs_newinfo_setrdev(struct puffs_newinfo *pni, dev_t rdev) 189 { 190 191 *pni->pni_rdev = rdev; 192 } 193 194 void 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 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 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