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
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
|
/* Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
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, either version 3 of the License, or
(at your option) any later version.
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, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <stdlib.h>
#include <assert.h>
#include <string.h>
#include <urcu.h>
#include "common.h"
#include "zone/zone.h"
#include "zone/node.h"
#include "dname.h"
#include "util/descriptor.h"
#include "nsec3.h"
#include "util/debug.h"
#include "util/utils.h"
#include "hash/cuckoo-hash-table.h"
#include "zone/zone-contents.h"
/*! \brief Adaptor for knot_zone_deep_free() */
static void knot_zone_dtor(struct ref_t *p) {
knot_zone_t *z = (knot_zone_t *)p;
knot_zone_deep_free(&z, 0);
}
/*----------------------------------------------------------------------------*/
/* API functions */
/*----------------------------------------------------------------------------*/
knot_zone_t *knot_zone_new_empty(knot_dname_t *name)
{
if (!name) {
return 0;
}
dbg_zone("Creating new zone!\n");
knot_zone_t *zone = malloc(sizeof(knot_zone_t));
if (zone == NULL) {
ERR_ALLOC_FAILED;
return NULL;
}
memset(zone, 0, sizeof(knot_zone_t));
// save the zone name
dbg_zone("Setting zone name.\n");
zone->name = name;
/* Initialize reference counting. */
ref_init(&zone->ref, knot_zone_dtor);
/* Set reference counter to 1, caller should release it after use. */
knot_zone_retain(zone);
return zone;
}
/*----------------------------------------------------------------------------*/
knot_zone_t *knot_zone_new(knot_node_t *apex, uint node_count,
int use_domain_table)
{
knot_zone_t *zone = knot_zone_new_empty(
knot_dname_deep_copy(knot_node_owner(apex)));
if (zone == NULL) {
return NULL;
}
dbg_zone("Creating zone contents.\n");
zone->contents = knot_zone_contents_new(apex, node_count,
use_domain_table, zone);
if (zone->contents == NULL) {
knot_dname_release(zone->name);
free(zone);
return NULL;
}
zone->contents->zone = zone;
return zone;
}
/*----------------------------------------------------------------------------*/
knot_zone_contents_t *knot_zone_get_contents(
const knot_zone_t *zone)
{
if (zone == NULL) {
return NULL;
}
return rcu_dereference(zone->contents);
}
/*----------------------------------------------------------------------------*/
const knot_zone_contents_t *knot_zone_contents(
const knot_zone_t *zone)
{
if (zone == NULL) {
return NULL;
}
return rcu_dereference(zone->contents);
}
/*----------------------------------------------------------------------------*/
time_t knot_zone_version(const knot_zone_t *zone)
{
if (zone == NULL) {
return KNOT_EINVAL;
}
return zone->version;
}
/*----------------------------------------------------------------------------*/
void knot_zone_set_version(knot_zone_t *zone, time_t version)
{
if (zone == NULL) {
return;
}
zone->version = version;
}
/*----------------------------------------------------------------------------*/
short knot_zone_is_master(const knot_zone_t *zone)
{
return zone->flags & KNOT_ZONE_MASTER;
}
/*----------------------------------------------------------------------------*/
void knot_zone_set_master(knot_zone_t *zone, short master)
{
if (master) {
zone->flags |= KNOT_ZONE_MASTER;
} else {
zone->flags &= ~KNOT_ZONE_MASTER;
}
}
/*----------------------------------------------------------------------------*/
const void *knot_zone_data(const knot_zone_t *zone)
{
return zone->data;
}
/*----------------------------------------------------------------------------*/
void knot_zone_set_data(knot_zone_t *zone, void *data)
{
zone->data = data;
}
/*----------------------------------------------------------------------------*/
const knot_dname_t *knot_zone_name(const knot_zone_t *zone)
{
return zone->name;
}
/*----------------------------------------------------------------------------*/
knot_zone_contents_t *knot_zone_switch_contents(knot_zone_t *zone,
knot_zone_contents_t *new_contents)
{
if (zone == NULL) {
return NULL;
}
knot_zone_contents_t *old_contents =
rcu_xchg_pointer(&zone->contents, new_contents);
return old_contents;
}
/*----------------------------------------------------------------------------*/
void knot_zone_free(knot_zone_t **zone)
{
if (zone == NULL || *zone == NULL) {
return;
}
dbg_zone("zone_free().\n");
if ((*zone)->contents
&& !knot_zone_contents_gen_is_old((*zone)->contents)) {
// zone is in the middle of an update, report
dbg_zone("Destroying zone that is in the middle of an "
"update.\n");
}
knot_dname_release((*zone)->name);
/* Call zone data destructor if exists. */
if ((*zone)->dtor) {
(*zone)->dtor(*zone);
}
knot_zone_contents_free(&(*zone)->contents);
free(*zone);
*zone = NULL;
dbg_zone("Done.\n");
}
/*----------------------------------------------------------------------------*/
void knot_zone_deep_free(knot_zone_t **zone, int destroy_dname_table)
{
if (zone == NULL || *zone == NULL) {
return;
}
if ((*zone)->contents
&& !knot_zone_contents_gen_is_old((*zone)->contents)) {
// zone is in the middle of an update, report
dbg_zone("Destroying zone that is in the middle of an "
"update.\n");
}
dbg_zone_exec(
char *name = knot_dname_to_str((*zone)->name);
dbg_zone("Destroying zone %p, name: %s.\n", *zone, name);
free(name);
);
knot_dname_release((*zone)->name);
/* Call zone data destructor if exists. */
if ((*zone)->dtor) {
(*zone)->dtor(*zone);
}
knot_zone_contents_deep_free(&(*zone)->contents, destroy_dname_table);
free(*zone);
*zone = NULL;
}
void knot_zone_set_dtor(knot_zone_t *zone, int (*dtor)(struct knot_zone *))
{
if (zone != NULL) {
zone->dtor = dtor;
}
}
void knot_zone_set_flag(knot_zone_t *zone, knot_zone_flag_t flag, unsigned on)
{
if (zone != NULL) {
if (on) {
zone->flags |= flag;
} else {
zone->flags &= ~flag;
}
}
}
|
