x_tables.c revision df0933dcb027e156cb5253570ad694b81bd52b69
12e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte/* 22e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte * x_tables core - Backend for {ip,ip6,arp}_tables 32e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte * 42e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte * Copyright (C) 2006-2006 Harald Welte <laforge@netfilter.org> 52e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte * 62e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte * Based on existing ip_tables code which is 72e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte * Copyright (C) 1999 Paul `Rusty' Russell & Michael J. Neuling 82e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte * Copyright (C) 2000-2005 Netfilter Core Team <coreteam@netfilter.org> 92e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte * 102e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte * This program is free software; you can redistribute it and/or modify 112e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte * it under the terms of the GNU General Public License version 2 as 122e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte * published by the Free Software Foundation. 132e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte * 142e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte */ 152e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 162e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte#include <linux/kernel.h> 172e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte#include <linux/socket.h> 182e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte#include <linux/net.h> 192e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte#include <linux/proc_fs.h> 202e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte#include <linux/seq_file.h> 212e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte#include <linux/string.h> 222e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte#include <linux/vmalloc.h> 239e19bb6d7a0959f5028d46e1ab99c50f0d36eda8Ingo Molnar#include <linux/mutex.h> 242e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 252e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte#include <linux/netfilter/x_tables.h> 262e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte#include <linux/netfilter_arp.h> 272e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 289e19bb6d7a0959f5028d46e1ab99c50f0d36eda8Ingo Molnar 292e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald WelteMODULE_LICENSE("GPL"); 302e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald WelteMODULE_AUTHOR("Harald Welte <laforge@netfilter.org>"); 312e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald WelteMODULE_DESCRIPTION("[ip,ip6,arp]_tables backend module"); 322e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 332e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte#define SMP_ALIGN(x) (((x) + SMP_CACHE_BYTES-1) & ~(SMP_CACHE_BYTES-1)) 342e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 352e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Weltestruct xt_af { 369e19bb6d7a0959f5028d46e1ab99c50f0d36eda8Ingo Molnar struct mutex mutex; 372e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte struct list_head match; 382e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte struct list_head target; 392e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte struct list_head tables; 402722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin struct mutex compat_mutex; 412e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte}; 422e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 432e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Weltestatic struct xt_af *xt; 442e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 452e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte#ifdef DEBUG_IP_FIREWALL_USER 462e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte#define duprintf(format, args...) printk(format , ## args) 472e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte#else 482e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte#define duprintf(format, args...) 492e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte#endif 502e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 512e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welteenum { 522e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte TABLE, 532e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte TARGET, 542e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte MATCH, 552e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte}; 562e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 5737f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardystatic const char *xt_prefix[NPROTO] = { 5837f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy [AF_INET] = "ip", 5937f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy [AF_INET6] = "ip6", 6037f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy [NF_ARP] = "arp", 6137f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy}; 6237f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy 632e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte/* Registration hooks for targets. */ 642e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welteint 65a45049c51ce6a3fecf2a909b591b28164c927112Pablo Neira Ayusoxt_register_target(struct xt_target *target) 662e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte{ 67a45049c51ce6a3fecf2a909b591b28164c927112Pablo Neira Ayuso int ret, af = target->family; 682e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 699e19bb6d7a0959f5028d46e1ab99c50f0d36eda8Ingo Molnar ret = mutex_lock_interruptible(&xt[af].mutex); 702e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (ret != 0) 712e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return ret; 722e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte list_add(&target->list, &xt[af].target); 739e19bb6d7a0959f5028d46e1ab99c50f0d36eda8Ingo Molnar mutex_unlock(&xt[af].mutex); 742e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return ret; 752e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte} 762e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald WelteEXPORT_SYMBOL(xt_register_target); 772e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 782e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Weltevoid 79a45049c51ce6a3fecf2a909b591b28164c927112Pablo Neira Ayusoxt_unregister_target(struct xt_target *target) 802e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte{ 81a45049c51ce6a3fecf2a909b591b28164c927112Pablo Neira Ayuso int af = target->family; 82a45049c51ce6a3fecf2a909b591b28164c927112Pablo Neira Ayuso 839e19bb6d7a0959f5028d46e1ab99c50f0d36eda8Ingo Molnar mutex_lock(&xt[af].mutex); 84df0933dcb027e156cb5253570ad694b81bd52b69Patrick McHardy list_del(&target->list); 859e19bb6d7a0959f5028d46e1ab99c50f0d36eda8Ingo Molnar mutex_unlock(&xt[af].mutex); 862e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte} 872e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald WelteEXPORT_SYMBOL(xt_unregister_target); 882e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 892e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welteint 9052d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardyxt_register_targets(struct xt_target *target, unsigned int n) 9152d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy{ 9252d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy unsigned int i; 9352d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy int err = 0; 9452d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy 9552d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy for (i = 0; i < n; i++) { 9652d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy err = xt_register_target(&target[i]); 9752d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy if (err) 9852d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy goto err; 9952d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy } 10052d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy return err; 10152d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy 10252d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardyerr: 10352d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy if (i > 0) 10452d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy xt_unregister_targets(target, i); 10552d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy return err; 10652d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy} 10752d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardyEXPORT_SYMBOL(xt_register_targets); 10852d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy 10952d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardyvoid 11052d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardyxt_unregister_targets(struct xt_target *target, unsigned int n) 11152d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy{ 11252d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy unsigned int i; 11352d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy 11452d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy for (i = 0; i < n; i++) 11552d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy xt_unregister_target(&target[i]); 11652d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy} 11752d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardyEXPORT_SYMBOL(xt_unregister_targets); 11852d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy 11952d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardyint 120a45049c51ce6a3fecf2a909b591b28164c927112Pablo Neira Ayusoxt_register_match(struct xt_match *match) 1212e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte{ 122a45049c51ce6a3fecf2a909b591b28164c927112Pablo Neira Ayuso int ret, af = match->family; 1232e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 1249e19bb6d7a0959f5028d46e1ab99c50f0d36eda8Ingo Molnar ret = mutex_lock_interruptible(&xt[af].mutex); 1252e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (ret != 0) 1262e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return ret; 1272e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 1282e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte list_add(&match->list, &xt[af].match); 1299e19bb6d7a0959f5028d46e1ab99c50f0d36eda8Ingo Molnar mutex_unlock(&xt[af].mutex); 1302e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 1312e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return ret; 1322e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte} 1332e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald WelteEXPORT_SYMBOL(xt_register_match); 1342e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 1352e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Weltevoid 136a45049c51ce6a3fecf2a909b591b28164c927112Pablo Neira Ayusoxt_unregister_match(struct xt_match *match) 1372e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte{ 138a45049c51ce6a3fecf2a909b591b28164c927112Pablo Neira Ayuso int af = match->family; 139a45049c51ce6a3fecf2a909b591b28164c927112Pablo Neira Ayuso 1409e19bb6d7a0959f5028d46e1ab99c50f0d36eda8Ingo Molnar mutex_lock(&xt[af].mutex); 141df0933dcb027e156cb5253570ad694b81bd52b69Patrick McHardy list_del(&match->list); 1429e19bb6d7a0959f5028d46e1ab99c50f0d36eda8Ingo Molnar mutex_unlock(&xt[af].mutex); 1432e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte} 1442e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald WelteEXPORT_SYMBOL(xt_unregister_match); 1452e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 14652d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardyint 14752d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardyxt_register_matches(struct xt_match *match, unsigned int n) 14852d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy{ 14952d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy unsigned int i; 15052d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy int err = 0; 15152d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy 15252d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy for (i = 0; i < n; i++) { 15352d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy err = xt_register_match(&match[i]); 15452d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy if (err) 15552d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy goto err; 15652d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy } 15752d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy return err; 15852d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy 15952d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardyerr: 16052d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy if (i > 0) 16152d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy xt_unregister_matches(match, i); 16252d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy return err; 16352d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy} 16452d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardyEXPORT_SYMBOL(xt_register_matches); 16552d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy 16652d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardyvoid 16752d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardyxt_unregister_matches(struct xt_match *match, unsigned int n) 16852d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy{ 16952d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy unsigned int i; 17052d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy 17152d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy for (i = 0; i < n; i++) 17252d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy xt_unregister_match(&match[i]); 17352d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy} 17452d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardyEXPORT_SYMBOL(xt_unregister_matches); 17552d9c42ef2563d2c420eb23b96bf5a4cae9e167bPatrick McHardy 1762e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 1772e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte/* 1782e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte * These are weird, but module loading must not be done with mutex 1792e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte * held (since they will register), and we have to have a single 1802e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte * function to use try_then_request_module(). 1812e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte */ 1822e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 1832e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte/* Find match, grabs ref. Returns ERR_PTR() on error. */ 1842e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Weltestruct xt_match *xt_find_match(int af, const char *name, u8 revision) 1852e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte{ 1862e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte struct xt_match *m; 1872e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte int err = 0; 1882e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 1899e19bb6d7a0959f5028d46e1ab99c50f0d36eda8Ingo Molnar if (mutex_lock_interruptible(&xt[af].mutex) != 0) 1902e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return ERR_PTR(-EINTR); 1912e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 1922e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte list_for_each_entry(m, &xt[af].match, list) { 1932e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (strcmp(m->name, name) == 0) { 1942e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (m->revision == revision) { 1952e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (try_module_get(m->me)) { 1969e19bb6d7a0959f5028d46e1ab99c50f0d36eda8Ingo Molnar mutex_unlock(&xt[af].mutex); 1972e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return m; 1982e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte } 1992e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte } else 2002e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte err = -EPROTOTYPE; /* Found something. */ 2012e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte } 2022e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte } 2039e19bb6d7a0959f5028d46e1ab99c50f0d36eda8Ingo Molnar mutex_unlock(&xt[af].mutex); 2042e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return ERR_PTR(err); 2052e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte} 2062e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald WelteEXPORT_SYMBOL(xt_find_match); 2072e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 2082e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte/* Find target, grabs ref. Returns ERR_PTR() on error. */ 2092e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Weltestruct xt_target *xt_find_target(int af, const char *name, u8 revision) 2102e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte{ 2112e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte struct xt_target *t; 2122e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte int err = 0; 2132e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 2149e19bb6d7a0959f5028d46e1ab99c50f0d36eda8Ingo Molnar if (mutex_lock_interruptible(&xt[af].mutex) != 0) 2152e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return ERR_PTR(-EINTR); 2162e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 2172e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte list_for_each_entry(t, &xt[af].target, list) { 2182e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (strcmp(t->name, name) == 0) { 2192e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (t->revision == revision) { 2202e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (try_module_get(t->me)) { 2219e19bb6d7a0959f5028d46e1ab99c50f0d36eda8Ingo Molnar mutex_unlock(&xt[af].mutex); 2222e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return t; 2232e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte } 2242e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte } else 2252e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte err = -EPROTOTYPE; /* Found something. */ 2262e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte } 2272e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte } 2289e19bb6d7a0959f5028d46e1ab99c50f0d36eda8Ingo Molnar mutex_unlock(&xt[af].mutex); 2292e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return ERR_PTR(err); 2302e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte} 2312e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald WelteEXPORT_SYMBOL(xt_find_target); 2322e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 2332e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Weltestruct xt_target *xt_request_find_target(int af, const char *name, u8 revision) 2342e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte{ 2352e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte struct xt_target *target; 2362e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 2372e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte target = try_then_request_module(xt_find_target(af, name, revision), 23837f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy "%st_%s", xt_prefix[af], name); 2392e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (IS_ERR(target) || !target) 2402e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return NULL; 2412e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return target; 2422e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte} 2432e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald WelteEXPORT_SYMBOL_GPL(xt_request_find_target); 2442e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 2452e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Weltestatic int match_revfn(int af, const char *name, u8 revision, int *bestp) 2462e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte{ 2472e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte struct xt_match *m; 2482e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte int have_rev = 0; 2492e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 2502e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte list_for_each_entry(m, &xt[af].match, list) { 2512e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (strcmp(m->name, name) == 0) { 2522e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (m->revision > *bestp) 2532e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte *bestp = m->revision; 2542e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (m->revision == revision) 2552e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte have_rev = 1; 2562e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte } 2572e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte } 2582e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return have_rev; 2592e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte} 2602e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 2612e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Weltestatic int target_revfn(int af, const char *name, u8 revision, int *bestp) 2622e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte{ 2632e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte struct xt_target *t; 2642e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte int have_rev = 0; 2652e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 2662e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte list_for_each_entry(t, &xt[af].target, list) { 2672e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (strcmp(t->name, name) == 0) { 2682e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (t->revision > *bestp) 2692e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte *bestp = t->revision; 2702e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (t->revision == revision) 2712e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte have_rev = 1; 2722e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte } 2732e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte } 2742e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return have_rev; 2752e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte} 2762e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 2772e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte/* Returns true or false (if no such extension at all) */ 2782e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welteint xt_find_revision(int af, const char *name, u8 revision, int target, 2792e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte int *err) 2802e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte{ 2812e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte int have_rev, best = -1; 2822e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 2839e19bb6d7a0959f5028d46e1ab99c50f0d36eda8Ingo Molnar if (mutex_lock_interruptible(&xt[af].mutex) != 0) { 2842e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte *err = -EINTR; 2852e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return 1; 2862e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte } 2872e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (target == 1) 2882e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte have_rev = target_revfn(af, name, revision, &best); 2892e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte else 2902e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte have_rev = match_revfn(af, name, revision, &best); 2919e19bb6d7a0959f5028d46e1ab99c50f0d36eda8Ingo Molnar mutex_unlock(&xt[af].mutex); 2922e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 2932e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte /* Nothing at all? Return 0 to try loading module. */ 2942e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (best == -1) { 2952e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte *err = -ENOENT; 2962e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return 0; 2972e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte } 2982e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 2992e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte *err = best; 3002e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (!have_rev) 3012e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte *err = -EPROTONOSUPPORT; 3022e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return 1; 3032e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte} 3042e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald WelteEXPORT_SYMBOL_GPL(xt_find_revision); 3052e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 30637f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardyint xt_check_match(const struct xt_match *match, unsigned short family, 30737f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy unsigned int size, const char *table, unsigned int hook_mask, 30837f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy unsigned short proto, int inv_proto) 30937f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy{ 31037f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy if (XT_ALIGN(match->matchsize) != size) { 31137f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy printk("%s_tables: %s match: invalid size %Zu != %u\n", 31237f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy xt_prefix[family], match->name, 31337f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy XT_ALIGN(match->matchsize), size); 31437f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy return -EINVAL; 31537f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy } 31637f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy if (match->table && strcmp(match->table, table)) { 31737f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy printk("%s_tables: %s match: only valid in %s table, not %s\n", 31837f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy xt_prefix[family], match->name, match->table, table); 31937f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy return -EINVAL; 32037f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy } 32137f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy if (match->hooks && (hook_mask & ~match->hooks) != 0) { 32237f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy printk("%s_tables: %s match: bad hook_mask %u\n", 32337f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy xt_prefix[family], match->name, hook_mask); 32437f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy return -EINVAL; 32537f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy } 32637f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy if (match->proto && (match->proto != proto || inv_proto)) { 32737f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy printk("%s_tables: %s match: only valid for protocol %u\n", 32837f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy xt_prefix[family], match->name, match->proto); 32937f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy return -EINVAL; 33037f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy } 33137f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy return 0; 33237f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy} 33337f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardyEXPORT_SYMBOL_GPL(xt_check_match); 33437f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy 3352722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin#ifdef CONFIG_COMPAT 3362722971cbe831117686039d5c334f2c0f560be13Dmitry Mishinint xt_compat_match(void *match, void **dstptr, int *size, int convert) 3372722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin{ 3382722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin struct xt_match *m; 3392722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin struct compat_xt_entry_match *pcompat_m; 3402722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin struct xt_entry_match *pm; 3412722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin u_int16_t msize; 3422722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin int off, ret; 3432722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin 3442722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin ret = 0; 3452722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin m = ((struct xt_entry_match *)match)->u.kernel.match; 3462722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin off = XT_ALIGN(m->matchsize) - COMPAT_XT_ALIGN(m->matchsize); 3472722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin switch (convert) { 3482722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin case COMPAT_TO_USER: 3492722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin pm = (struct xt_entry_match *)match; 3502722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin msize = pm->u.user.match_size; 3517800007c1e2d42cd4120b87b0ba3f3480f17f30aPatrick McHardy if (copy_to_user(*dstptr, pm, msize)) { 3522722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin ret = -EFAULT; 3532722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin break; 3542722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin } 3552722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin msize -= off; 3562722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin if (put_user(msize, (u_int16_t *)*dstptr)) 3572722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin ret = -EFAULT; 3582722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin *size -= off; 3592722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin *dstptr += msize; 3602722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin break; 3612722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin case COMPAT_FROM_USER: 3622722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin pcompat_m = (struct compat_xt_entry_match *)match; 3632722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin pm = (struct xt_entry_match *)*dstptr; 3642722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin msize = pcompat_m->u.user.match_size; 3652722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin memcpy(pm, pcompat_m, msize); 3662722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin msize += off; 3672722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin pm->u.user.match_size = msize; 3682722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin *size += off; 3692722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin *dstptr += msize; 3702722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin break; 3712722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin case COMPAT_CALC_SIZE: 3722722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin *size += off; 3732722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin break; 3742722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin default: 3752722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin ret = -ENOPROTOOPT; 3762722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin break; 3772722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin } 3782722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin return ret; 3792722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin} 3802722971cbe831117686039d5c334f2c0f560be13Dmitry MishinEXPORT_SYMBOL_GPL(xt_compat_match); 3812722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin#endif 3822722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin 38337f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardyint xt_check_target(const struct xt_target *target, unsigned short family, 38437f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy unsigned int size, const char *table, unsigned int hook_mask, 38537f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy unsigned short proto, int inv_proto) 38637f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy{ 38737f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy if (XT_ALIGN(target->targetsize) != size) { 38837f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy printk("%s_tables: %s target: invalid size %Zu != %u\n", 38937f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy xt_prefix[family], target->name, 39037f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy XT_ALIGN(target->targetsize), size); 39137f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy return -EINVAL; 39237f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy } 39337f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy if (target->table && strcmp(target->table, table)) { 39437f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy printk("%s_tables: %s target: only valid in %s table, not %s\n", 39537f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy xt_prefix[family], target->name, target->table, table); 39637f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy return -EINVAL; 39737f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy } 39837f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy if (target->hooks && (hook_mask & ~target->hooks) != 0) { 39937f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy printk("%s_tables: %s target: bad hook_mask %u\n", 40037f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy xt_prefix[family], target->name, hook_mask); 40137f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy return -EINVAL; 40237f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy } 40337f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy if (target->proto && (target->proto != proto || inv_proto)) { 40437f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy printk("%s_tables: %s target: only valid for protocol %u\n", 40537f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy xt_prefix[family], target->name, target->proto); 40637f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy return -EINVAL; 40737f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy } 40837f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy return 0; 40937f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy} 41037f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardyEXPORT_SYMBOL_GPL(xt_check_target); 41137f9f7334b86ffc3b8a1921842ae33cb9aa22ee3Patrick McHardy 4122722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin#ifdef CONFIG_COMPAT 4132722971cbe831117686039d5c334f2c0f560be13Dmitry Mishinint xt_compat_target(void *target, void **dstptr, int *size, int convert) 4142722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin{ 4152722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin struct xt_target *t; 4162722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin struct compat_xt_entry_target *pcompat; 4172722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin struct xt_entry_target *pt; 4182722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin u_int16_t tsize; 4192722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin int off, ret; 4202722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin 4212722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin ret = 0; 4222722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin t = ((struct xt_entry_target *)target)->u.kernel.target; 4232722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin off = XT_ALIGN(t->targetsize) - COMPAT_XT_ALIGN(t->targetsize); 4242722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin switch (convert) { 4252722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin case COMPAT_TO_USER: 4262722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin pt = (struct xt_entry_target *)target; 4272722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin tsize = pt->u.user.target_size; 4287800007c1e2d42cd4120b87b0ba3f3480f17f30aPatrick McHardy if (copy_to_user(*dstptr, pt, tsize)) { 4292722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin ret = -EFAULT; 4302722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin break; 4312722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin } 4322722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin tsize -= off; 4332722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin if (put_user(tsize, (u_int16_t *)*dstptr)) 4342722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin ret = -EFAULT; 4352722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin *size -= off; 4362722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin *dstptr += tsize; 4372722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin break; 4382722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin case COMPAT_FROM_USER: 4392722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin pcompat = (struct compat_xt_entry_target *)target; 4402722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin pt = (struct xt_entry_target *)*dstptr; 4412722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin tsize = pcompat->u.user.target_size; 4422722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin memcpy(pt, pcompat, tsize); 4432722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin tsize += off; 4442722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin pt->u.user.target_size = tsize; 4452722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin *size += off; 4462722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin *dstptr += tsize; 4472722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin break; 4482722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin case COMPAT_CALC_SIZE: 4492722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin *size += off; 4502722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin break; 4512722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin default: 4522722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin ret = -ENOPROTOOPT; 4532722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin break; 4542722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin } 4552722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin return ret; 4562722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin} 4572722971cbe831117686039d5c334f2c0f560be13Dmitry MishinEXPORT_SYMBOL_GPL(xt_compat_target); 4582722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin#endif 4592722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin 4602e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Weltestruct xt_table_info *xt_alloc_table_info(unsigned int size) 4612e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte{ 4622e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte struct xt_table_info *newinfo; 4632e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte int cpu; 4642e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 4652e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte /* Pedantry: prevent them from hitting BUG() in vmalloc.c --RR */ 4662e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if ((SMP_ALIGN(size) >> PAGE_SHIFT) + 2 > num_physpages) 4672e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return NULL; 4682e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 4692e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte newinfo = kzalloc(sizeof(struct xt_table_info), GFP_KERNEL); 4702e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (!newinfo) 4712e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return NULL; 4722e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 4732e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte newinfo->size = size; 4742e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 4756f912042256c12b0927438122594f5379b364f5dKAMEZAWA Hiroyuki for_each_possible_cpu(cpu) { 4762e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (size <= PAGE_SIZE) 4772e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte newinfo->entries[cpu] = kmalloc_node(size, 4782e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte GFP_KERNEL, 4792e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte cpu_to_node(cpu)); 4802e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte else 4812e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte newinfo->entries[cpu] = vmalloc_node(size, 4822e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte cpu_to_node(cpu)); 4832e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 4842e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (newinfo->entries[cpu] == NULL) { 4852e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte xt_free_table_info(newinfo); 4862e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return NULL; 4872e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte } 4882e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte } 4892e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 4902e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return newinfo; 4912e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte} 4922e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald WelteEXPORT_SYMBOL(xt_alloc_table_info); 4932e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 4942e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Weltevoid xt_free_table_info(struct xt_table_info *info) 4952e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte{ 4962e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte int cpu; 4972e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 4986f912042256c12b0927438122594f5379b364f5dKAMEZAWA Hiroyuki for_each_possible_cpu(cpu) { 4992e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (info->size <= PAGE_SIZE) 5002e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte kfree(info->entries[cpu]); 5012e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte else 5022e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte vfree(info->entries[cpu]); 5032e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte } 5042e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte kfree(info); 5052e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte} 5062e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald WelteEXPORT_SYMBOL(xt_free_table_info); 5072e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 5082e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte/* Find table by name, grabs mutex & ref. Returns ERR_PTR() on error. */ 5092e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Weltestruct xt_table *xt_find_table_lock(int af, const char *name) 5102e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte{ 5112e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte struct xt_table *t; 5122e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 5139e19bb6d7a0959f5028d46e1ab99c50f0d36eda8Ingo Molnar if (mutex_lock_interruptible(&xt[af].mutex) != 0) 5142e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return ERR_PTR(-EINTR); 5152e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 5162e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte list_for_each_entry(t, &xt[af].tables, list) 5172e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (strcmp(t->name, name) == 0 && try_module_get(t->me)) 5182e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return t; 5199e19bb6d7a0959f5028d46e1ab99c50f0d36eda8Ingo Molnar mutex_unlock(&xt[af].mutex); 5202e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return NULL; 5212e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte} 5222e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald WelteEXPORT_SYMBOL_GPL(xt_find_table_lock); 5232e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 5242e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Weltevoid xt_table_unlock(struct xt_table *table) 5252e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte{ 5269e19bb6d7a0959f5028d46e1ab99c50f0d36eda8Ingo Molnar mutex_unlock(&xt[table->af].mutex); 5272e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte} 5282e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald WelteEXPORT_SYMBOL_GPL(xt_table_unlock); 5292e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 5302722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin#ifdef CONFIG_COMPAT 5312722971cbe831117686039d5c334f2c0f560be13Dmitry Mishinvoid xt_compat_lock(int af) 5322722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin{ 5332722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin mutex_lock(&xt[af].compat_mutex); 5342722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin} 5352722971cbe831117686039d5c334f2c0f560be13Dmitry MishinEXPORT_SYMBOL_GPL(xt_compat_lock); 5362722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin 5372722971cbe831117686039d5c334f2c0f560be13Dmitry Mishinvoid xt_compat_unlock(int af) 5382722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin{ 5392722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin mutex_unlock(&xt[af].compat_mutex); 5402722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin} 5412722971cbe831117686039d5c334f2c0f560be13Dmitry MishinEXPORT_SYMBOL_GPL(xt_compat_unlock); 5422722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin#endif 5432e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 5442e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Weltestruct xt_table_info * 5452e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Weltext_replace_table(struct xt_table *table, 5462e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte unsigned int num_counters, 5472e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte struct xt_table_info *newinfo, 5482e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte int *error) 5492e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte{ 5502e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte struct xt_table_info *oldinfo, *private; 5512e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 5522e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte /* Do the substitution. */ 5532e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte write_lock_bh(&table->lock); 5542e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte private = table->private; 5552e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte /* Check inside lock: is the old number correct? */ 5562e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (num_counters != private->number) { 5572e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte duprintf("num_counters != table->private->number (%u/%u)\n", 5582e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte num_counters, private->number); 5592e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte write_unlock_bh(&table->lock); 5602e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte *error = -EAGAIN; 5612e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return NULL; 5622e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte } 5632e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte oldinfo = private; 5642e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte table->private = newinfo; 5652e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte newinfo->initial_entries = oldinfo->initial_entries; 5662e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte write_unlock_bh(&table->lock); 5672e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 5682e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return oldinfo; 5692e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte} 5702e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald WelteEXPORT_SYMBOL_GPL(xt_replace_table); 5712e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 5722e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welteint xt_register_table(struct xt_table *table, 5732e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte struct xt_table_info *bootstrap, 5742e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte struct xt_table_info *newinfo) 5752e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte{ 5762e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte int ret; 5772e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte struct xt_table_info *private; 578df0933dcb027e156cb5253570ad694b81bd52b69Patrick McHardy struct xt_table *t; 5792e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 5809e19bb6d7a0959f5028d46e1ab99c50f0d36eda8Ingo Molnar ret = mutex_lock_interruptible(&xt[table->af].mutex); 5812e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (ret != 0) 5822e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return ret; 5832e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 5842e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte /* Don't autoload: we'd eat our tail... */ 585df0933dcb027e156cb5253570ad694b81bd52b69Patrick McHardy list_for_each_entry(t, &xt[table->af].tables, list) { 586df0933dcb027e156cb5253570ad694b81bd52b69Patrick McHardy if (strcmp(t->name, table->name) == 0) { 587df0933dcb027e156cb5253570ad694b81bd52b69Patrick McHardy ret = -EEXIST; 588df0933dcb027e156cb5253570ad694b81bd52b69Patrick McHardy goto unlock; 589df0933dcb027e156cb5253570ad694b81bd52b69Patrick McHardy } 5902e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte } 5912e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 5922e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte /* Simplifies replace_table code. */ 5932e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte table->private = bootstrap; 59491536b7ae67710ca888e03ea82c60f0ac073a015Dmitry Mishin rwlock_init(&table->lock); 5952e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (!xt_replace_table(table, 0, newinfo, &ret)) 5962e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte goto unlock; 5972e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 5982e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte private = table->private; 5992e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte duprintf("table->private->number = %u\n", private->number); 6002e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 6012e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte /* save number of initial entries */ 6022e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte private->initial_entries = private->number; 6032e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 604df0933dcb027e156cb5253570ad694b81bd52b69Patrick McHardy list_add(&table->list, &xt[table->af].tables); 6052e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 6062e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte ret = 0; 6072e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte unlock: 6089e19bb6d7a0959f5028d46e1ab99c50f0d36eda8Ingo Molnar mutex_unlock(&xt[table->af].mutex); 6092e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return ret; 6102e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte} 6112e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald WelteEXPORT_SYMBOL_GPL(xt_register_table); 6122e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 6132e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Weltevoid *xt_unregister_table(struct xt_table *table) 6142e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte{ 6152e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte struct xt_table_info *private; 6162e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 6179e19bb6d7a0959f5028d46e1ab99c50f0d36eda8Ingo Molnar mutex_lock(&xt[table->af].mutex); 6182e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte private = table->private; 619df0933dcb027e156cb5253570ad694b81bd52b69Patrick McHardy list_del(&table->list); 6209e19bb6d7a0959f5028d46e1ab99c50f0d36eda8Ingo Molnar mutex_unlock(&xt[table->af].mutex); 6212e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 6222e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return private; 6232e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte} 6242e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald WelteEXPORT_SYMBOL_GPL(xt_unregister_table); 6252e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 6262e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte#ifdef CONFIG_PROC_FS 6272e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Weltestatic char *xt_proto_prefix[NPROTO] = { 6282e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte [AF_INET] = "ip", 6292e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte [AF_INET6] = "ip6", 6302e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte [NF_ARP] = "arp", 6312e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte}; 6322e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 6332e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Weltestatic struct list_head *xt_get_idx(struct list_head *list, struct seq_file *seq, loff_t pos) 6342e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte{ 6352e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte struct list_head *head = list->next; 6362e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 6372e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (!head || list_empty(list)) 6382e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return NULL; 6392e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 6402e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte while (pos && (head = head->next)) { 6412e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (head == list) 6422e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return NULL; 6432e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte pos--; 6442e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte } 6452e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return pos ? NULL : head; 6462e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte} 6472e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 6482e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Weltestatic struct list_head *type2list(u_int16_t af, u_int16_t type) 6492e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte{ 6502e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte struct list_head *list; 6512e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 6522e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte switch (type) { 6532e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte case TARGET: 6542e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte list = &xt[af].target; 6552e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte break; 6562e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte case MATCH: 6572e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte list = &xt[af].match; 6582e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte break; 6592e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte case TABLE: 6602e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte list = &xt[af].tables; 6612e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte break; 6622e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte default: 6632e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte list = NULL; 6642e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte break; 6652e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte } 6662e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 6672e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return list; 6682e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte} 6692e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 6702e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Weltestatic void *xt_tgt_seq_start(struct seq_file *seq, loff_t *pos) 6712e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte{ 6722e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte struct proc_dir_entry *pde = (struct proc_dir_entry *) seq->private; 6732e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte u_int16_t af = (unsigned long)pde->data & 0xffff; 6742e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte u_int16_t type = (unsigned long)pde->data >> 16; 6752e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte struct list_head *list; 6762e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 6772e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (af >= NPROTO) 6782e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return NULL; 6792e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 6802e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte list = type2list(af, type); 6812e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (!list) 6822e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return NULL; 6832e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 6849e19bb6d7a0959f5028d46e1ab99c50f0d36eda8Ingo Molnar if (mutex_lock_interruptible(&xt[af].mutex) != 0) 6852e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return NULL; 6862e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 6872e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return xt_get_idx(list, seq, *pos); 6882e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte} 6892e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 6902e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Weltestatic void *xt_tgt_seq_next(struct seq_file *seq, void *v, loff_t *pos) 6912e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte{ 6922e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte struct proc_dir_entry *pde = seq->private; 6932e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte u_int16_t af = (unsigned long)pde->data & 0xffff; 6942e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte u_int16_t type = (unsigned long)pde->data >> 16; 6952e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte struct list_head *list; 6962e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 6972e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (af >= NPROTO) 6982e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return NULL; 6992e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 7002e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte list = type2list(af, type); 7012e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (!list) 7022e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return NULL; 7032e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 7042e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte (*pos)++; 7052e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return xt_get_idx(list, seq, *pos); 7062e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte} 7072e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 7082e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Weltestatic void xt_tgt_seq_stop(struct seq_file *seq, void *v) 7092e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte{ 7102e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte struct proc_dir_entry *pde = seq->private; 7112e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte u_int16_t af = (unsigned long)pde->data & 0xffff; 7122e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 7139e19bb6d7a0959f5028d46e1ab99c50f0d36eda8Ingo Molnar mutex_unlock(&xt[af].mutex); 7142e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte} 7152e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 7162e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Weltestatic int xt_name_seq_show(struct seq_file *seq, void *v) 7172e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte{ 7182e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte char *name = (char *)v + sizeof(struct list_head); 7192e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 7202e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (strlen(name)) 7212e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return seq_printf(seq, "%s\n", name); 7222e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte else 7232e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return 0; 7242e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte} 7252e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 7262e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Weltestatic struct seq_operations xt_tgt_seq_ops = { 7272e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte .start = xt_tgt_seq_start, 7282e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte .next = xt_tgt_seq_next, 7292e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte .stop = xt_tgt_seq_stop, 7302e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte .show = xt_name_seq_show, 7312e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte}; 7322e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 7332e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Weltestatic int xt_tgt_open(struct inode *inode, struct file *file) 7342e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte{ 7352e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte int ret; 7362e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 7372e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte ret = seq_open(file, &xt_tgt_seq_ops); 7382e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (!ret) { 7392e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte struct seq_file *seq = file->private_data; 7402e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte struct proc_dir_entry *pde = PDE(inode); 7412e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 7422e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte seq->private = pde; 7432e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte } 7442e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 7452e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return ret; 7462e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte} 7472e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 7482e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Weltestatic struct file_operations xt_file_ops = { 7492e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte .owner = THIS_MODULE, 7502e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte .open = xt_tgt_open, 7512e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte .read = seq_read, 7522e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte .llseek = seq_lseek, 7532e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte .release = seq_release, 7542e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte}; 7552e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 7562e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte#define FORMAT_TABLES "_tables_names" 7572e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte#define FORMAT_MATCHES "_tables_matches" 7582e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte#define FORMAT_TARGETS "_tables_targets" 7592e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 7602e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte#endif /* CONFIG_PROC_FS */ 7612e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 7622e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welteint xt_proto_init(int af) 7632e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte{ 7642e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte#ifdef CONFIG_PROC_FS 7652e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte char buf[XT_FUNCTION_MAXNAMELEN]; 7662e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte struct proc_dir_entry *proc; 7672e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte#endif 7682e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 7692e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (af >= NPROTO) 7702e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return -EINVAL; 7712e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 7722e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 7732e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte#ifdef CONFIG_PROC_FS 7742e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte strlcpy(buf, xt_proto_prefix[af], sizeof(buf)); 7752e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte strlcat(buf, FORMAT_TABLES, sizeof(buf)); 7762e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte proc = proc_net_fops_create(buf, 0440, &xt_file_ops); 7772e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (!proc) 7782e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte goto out; 7792e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte proc->data = (void *) ((unsigned long) af | (TABLE << 16)); 7802e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 7812e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 7822e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte strlcpy(buf, xt_proto_prefix[af], sizeof(buf)); 7832e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte strlcat(buf, FORMAT_MATCHES, sizeof(buf)); 7842e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte proc = proc_net_fops_create(buf, 0440, &xt_file_ops); 7852e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (!proc) 7862e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte goto out_remove_tables; 7872e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte proc->data = (void *) ((unsigned long) af | (MATCH << 16)); 7882e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 7892e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte strlcpy(buf, xt_proto_prefix[af], sizeof(buf)); 7902e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte strlcat(buf, FORMAT_TARGETS, sizeof(buf)); 7912e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte proc = proc_net_fops_create(buf, 0440, &xt_file_ops); 7922e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (!proc) 7932e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte goto out_remove_matches; 7942e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte proc->data = (void *) ((unsigned long) af | (TARGET << 16)); 7952e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte#endif 7962e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 7972e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return 0; 7982e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 7992e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte#ifdef CONFIG_PROC_FS 8002e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welteout_remove_matches: 8012e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte strlcpy(buf, xt_proto_prefix[af], sizeof(buf)); 8022e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte strlcat(buf, FORMAT_MATCHES, sizeof(buf)); 8032e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte proc_net_remove(buf); 8042e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 8052e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welteout_remove_tables: 8062e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte strlcpy(buf, xt_proto_prefix[af], sizeof(buf)); 8072e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte strlcat(buf, FORMAT_TABLES, sizeof(buf)); 8082e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte proc_net_remove(buf); 8092e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welteout: 8102e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return -1; 8112e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte#endif 8122e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte} 8132e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald WelteEXPORT_SYMBOL_GPL(xt_proto_init); 8142e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 8152e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Weltevoid xt_proto_fini(int af) 8162e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte{ 8172e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte#ifdef CONFIG_PROC_FS 8182e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte char buf[XT_FUNCTION_MAXNAMELEN]; 8192e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 8202e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte strlcpy(buf, xt_proto_prefix[af], sizeof(buf)); 8212e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte strlcat(buf, FORMAT_TABLES, sizeof(buf)); 8222e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte proc_net_remove(buf); 8232e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 8242e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte strlcpy(buf, xt_proto_prefix[af], sizeof(buf)); 8252e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte strlcat(buf, FORMAT_TARGETS, sizeof(buf)); 8262e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte proc_net_remove(buf); 8272e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 8282e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte strlcpy(buf, xt_proto_prefix[af], sizeof(buf)); 8292e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte strlcat(buf, FORMAT_MATCHES, sizeof(buf)); 8302e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte proc_net_remove(buf); 8312e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte#endif /*CONFIG_PROC_FS*/ 8322e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte} 8332e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald WelteEXPORT_SYMBOL_GPL(xt_proto_fini); 8342e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 8352e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 8362e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Weltestatic int __init xt_init(void) 8372e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte{ 8382e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte int i; 8392e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 8402e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte xt = kmalloc(sizeof(struct xt_af) * NPROTO, GFP_KERNEL); 8412e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte if (!xt) 8422e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return -ENOMEM; 8432e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 8442e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte for (i = 0; i < NPROTO; i++) { 8459e19bb6d7a0959f5028d46e1ab99c50f0d36eda8Ingo Molnar mutex_init(&xt[i].mutex); 8462722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin#ifdef CONFIG_COMPAT 8472722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin mutex_init(&xt[i].compat_mutex); 8482722971cbe831117686039d5c334f2c0f560be13Dmitry Mishin#endif 8492e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte INIT_LIST_HEAD(&xt[i].target); 8502e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte INIT_LIST_HEAD(&xt[i].match); 8512e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte INIT_LIST_HEAD(&xt[i].tables); 8522e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte } 8532e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte return 0; 8542e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte} 8552e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 8562e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Weltestatic void __exit xt_fini(void) 8572e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte{ 8582e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte kfree(xt); 8592e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte} 8602e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 8612e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Weltemodule_init(xt_init); 8622e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Weltemodule_exit(xt_fini); 8632e4e6a17af35be359cc8f1c924f8f198fbd478ccHarald Welte 864