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/** 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 <config.h>
#endif
/*
* Source file for the ACL_CacheFlush-related routines.
*/
#include <prlog.h>
#include <base/util.h>
#include <libaccess/acl.h>
#include "aclpriv.h"
#include <libaccess/aclproto.h>
#include <libaccess/aclglobal.h>
#include <libaccess/las.h>
#include "aclcache.h"
/* #include <libaccess/dbtlibaccess.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;
}
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