1 /*
2 * Copyright (c) 2010 Wang Lei
3 * Author(s): Wang Lei (wang840925@gmail.com). All Rights Reserved.
4 *
5 * Internal DNS Rsolver stuff
6 *
7 * This library is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU Lesser General Public License as published
9 * by the Free Software Foundation; either version 2.1 of the License, or
10 * (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 * the GNU Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public License
18 * along with this library; if not, see <http://www.gnu.org/licenses/>.
19 */
20
21 #include <linux/compiler.h>
22 #include <linux/kernel.h>
23 #include <linux/sched.h>
24
25 /*
26 * Layout of key payload words.
27 */
28 enum {
29 dns_key_data,
30 dns_key_error,
31 };
32
33 /*
34 * dns_key.c
35 */
36 extern const struct cred *dns_resolver_cache;
37
38 /*
39 * debug tracing
40 */
41 extern unsigned int dns_resolver_debug;
42
43 #define kdebug(FMT, ...) \
44 do { \
45 if (unlikely(dns_resolver_debug)) \
46 printk(KERN_DEBUG "[%-6.6s] "FMT"\n", \
47 current->comm, ##__VA_ARGS__); \
48 } while (0)
49
50 #define kenter(FMT, ...) kdebug("==> %s("FMT")", __func__, ##__VA_ARGS__)
51 #define kleave(FMT, ...) kdebug("<== %s()"FMT"", __func__, ##__VA_ARGS__)