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