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