LXR linux/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 * dns_key.c
  27 */
  28extern const struct cred *dns_resolver_cache;
  29
  30/*
  31 * debug tracing
  32 */
  33extern unsigned int dns_resolver_debug;
  34
  35#define kdebug(FMT, ...)                                \
  36do {                                                    \
  37        if (unlikely(dns_resolver_debug))               \
  38                printk(KERN_DEBUG "[%-6.6s] "FMT"\n",   \
  39                       current->comm, ##__VA_ARGS__);   \
  40} while (0)
  41
  42#define kenter(FMT, ...) kdebug("==> %s("FMT")", __func__, ##__VA_ARGS__)
  43#define kleave(FMT, ...) kdebug("<== %s()"FMT"", __func__, ##__VA_ARGS__)
  44