/** BEGIN COPYRIGHT BLOCK * This Program is free software; you can redistribute it and/or modify it under * the terms of the GNU General Public License as published by the Free Software * Foundation; version 2 of the License. * * This Program is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. * * You should have received a copy of the GNU General Public License along with * this Program; if not, write to the Free Software Foundation, Inc., 59 Temple * Place, Suite 330, Boston, MA 02111-1307 USA. * * In addition, as a special exception, Red Hat, Inc. gives You the additional * right to link the code of this Program with code not covered under the GNU * General Public License ("Non-GPL Code") and to distribute linked combinations * including the two, subject to the limitations in this paragraph. Non-GPL Code * permitted under this exception must only link to the code of this Program * through those well defined interfaces identified in the file named EXCEPTION * found in the source code files (the "Approved Interfaces"). The files of * Non-GPL Code may instantiate templates or use macros or inline functions from * the Approved Interfaces without causing the resulting work to be covered by * the GNU General Public License. Only Red Hat, Inc. may make changes or * additions to the list of Approved Interfaces. You must obey the GNU General * Public License in all respects for all of the Program code and other code used * in conjunction with the Program except the Non-GPL Code covered by this * exception. If you modify this file, you may extend this exception to your * version of the file, but you are not obligated to do so. If you do not wish to * provide this exception without modification, you must delete this exception * statement from your version and license this file solely under the GPL without * exception. * * * Copyright (C) 2001 Sun Microsystems, Inc. Used by permission. * Copyright (C) 2005 Red Hat, Inc. * All rights reserved. * END COPYRIGHT BLOCK **/ #ifdef HAVE_CONFIG_H # include #endif /* * Source file for the ACL_CacheFlush-related routines. */ #include #include #include #include "aclpriv.h" #include #include #include #include "aclcache.h" extern void ACL_DatabaseDestroy(void); PRIntn deletelists(PRHashEntry *he, PRIntn i, void *arg) { ACLListHandle_t *acllist=(ACLListHandle_t *)he->value; NSErr_t *errp = 0; PR_ASSERT(he); PR_ASSERT(he->value); if (acllist->ref_count) { // If the list is in use, increment the counter. Then set the // stale flag. The other user can't delete the list since we're // counted as well. Finally, decrement the counter and whoever // sets it to zero will delete the ACL List. PR_ASSERT(ACL_CritHeld()); acllist->ref_count++; acllist->flags |= ACL_LIST_STALE; if (--acllist->ref_count == 0) ACL_ListDestroy(errp, acllist); } else { ACL_ListDestroy(errp, acllist); } return 0; } PRIntn restartdeletelists(PRHashEntry *he, PRIntn i, void *arg) { NSErr_t *errp = 0; // Cannot be anyone left using the lists, so just free them no matter // what. ACLListHandle_t *acllist=(ACLListHandle_t *)he->value; PR_ASSERT(he); PR_ASSERT(he->value); ACL_ListDestroy(errp, acllist); return 0; } static AclCacheFlushFunc_t AclCacheFlushRoutine = NULL; NSAPI_PUBLIC int ACL_CacheFlushRegister(AclCacheFlushFunc_t flush_func) { PR_ASSERT(flush_func); AclCacheFlushRoutine = flush_func; return 0; } NSAPI_PUBLIC int ACL_CacheFlush(void) { ACLGlobal_p newACLGlobal; NSErr_t *errp = 0; PR_ASSERT(ACLGlobal); PR_ASSERT(ACLGlobal->masterlist); PR_ASSERT(ACLGlobal->listhash); PR_ASSERT(ACLGlobal->urihash); PR_ASSERT(ACLGlobal->urigethash); PR_ASSERT(ACLGlobal->pool); ACL_CritEnter(); // Swap the pointers. Keep using the current database/method tables // until the new ones are built. This is a kludge. An in-progress // evaluation could conceivably get messed up, but the window seems // small. newACLGlobal = oldACLGlobal; oldACLGlobal = ACLGlobal; ACLGlobal = newACLGlobal; // Prepare the new ACLGlobal structure ACL_UriHashInit(); /* Also initializes ACLGlobal->pool */ ACL_ListHashInit(); ACLGlobal->evalhash = oldACLGlobal->evalhash; ACLGlobal->flushhash = oldACLGlobal->flushhash; ACLGlobal->methodhash = oldACLGlobal->methodhash; ACLGlobal->dbtypehash = oldACLGlobal->dbtypehash; ACLGlobal->dbnamehash = oldACLGlobal->dbnamehash; ACLGlobal->attrgetterhash = oldACLGlobal->attrgetterhash; ACLGlobal->databasepool = oldACLGlobal->databasepool; ACLGlobal->methodpool = oldACLGlobal->methodpool; // Mark all existing ACL Lists as stale. Delete any unreferenced ones. PR_HashTableEnumerateEntries(oldACLGlobal->listhash, deletelists, NULL); // Delete the old master list. ACL_ListDestroy(errp, oldACLGlobal->masterlist); oldACLGlobal->masterlist = NULL; PR_HashTableDestroy(oldACLGlobal->listhash); oldACLGlobal->listhash = NULL; PR_HashTableDestroy(oldACLGlobal->urihash); oldACLGlobal->urihash = NULL; PR_HashTableDestroy(oldACLGlobal->urigethash); oldACLGlobal->urigethash = NULL; pool_destroy(oldACLGlobal->pool); oldACLGlobal->pool = NULL; memset(oldACLGlobal, 0, sizeof(ACLGlobal_s)); // Read in the ACLs again in lib/frame if (AclCacheFlushRoutine) { (*AclCacheFlushRoutine)(); } ACL_CritExit(); return 0; } NSAPI_PUBLIC void ACL_Restart(void *clntData) { NSErr_t *errp = 0; PR_ASSERT(ACLGlobal); PR_ASSERT(ACLGlobal->masterlist); PR_ASSERT(ACLGlobal->listhash); PR_ASSERT(ACLGlobal->urihash); PR_ASSERT(ACLGlobal->urigethash); PR_ASSERT(ACLGlobal->pool); // Unlike ACL_CacheFlush, this routine can be much more cavalier about // freeing up memory, since there's guaranteed to be no users about at // this time. ACL_DatabaseDestroy(); ACL_MethodSetDefault(errp, ACL_METHOD_INVALID); // Mark all existing ACL Lists as stale. Delete any unreferenced ones // (i.e. all of them) PR_HashTableEnumerateEntries(ACLGlobal->listhash, restartdeletelists, NULL); // Delete the master list. ACL_ListDestroy(errp, ACLGlobal->masterlist); ACL_LasHashDestroy(); PR_HashTableDestroy(ACLGlobal->listhash); PR_HashTableDestroy(ACLGlobal->urihash); PR_HashTableDestroy(ACLGlobal->urigethash); pool_destroy(ACLGlobal->pool); PERM_FREE(ACLGlobal); ACLGlobal = NULL; PERM_FREE(oldACLGlobal); oldACLGlobal = NULL; return; }