net/dns_resolver/internal.h

   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__)