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__)
52