1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
|
/** BEGIN COPYRIGHT BLOCK
* Copyright 2001 Sun Microsystems, Inc.
* Portions copyright 1999, 2001-2003 Netscape Communications Corporation.
* All rights reserved.
* END COPYRIGHT BLOCK **/
/*
* Source file for the ACL_CacheFlush-related routines.
*/
#include <base/nsassert.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;
NS_ASSERT(he);
NS_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.
NS_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;
NS_ASSERT(he);
NS_ASSERT(he->value);
ACL_ListDestroy(errp, acllist);
return 0;
}
static AclCacheFlushFunc_t AclCacheFlushRoutine = NULL;
NSAPI_PUBLIC int
ACL_CacheFlushRegister(AclCacheFlushFunc_t flush_func)
{
NS_ASSERT(flush_func);
AclCacheFlushRoutine = flush_func;
return 0;
}
NSAPI_PUBLIC int
ACL_CacheFlush(void)
{
ACLGlobal_p newACLGlobal;
NSErr_t *errp = 0;
NS_ASSERT(ACLGlobal);
NS_ASSERT(ACLGlobal->masterlist);
NS_ASSERT(ACLGlobal->listhash);
NS_ASSERT(ACLGlobal->urihash);
NS_ASSERT(ACLGlobal->urigethash);
NS_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;
NS_ASSERT(ACLGlobal);
NS_ASSERT(ACLGlobal->masterlist);
NS_ASSERT(ACLGlobal->listhash);
NS_ASSERT(ACLGlobal->urihash);
NS_ASSERT(ACLGlobal->urigethash);
NS_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;
}
|
