Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This is a module which is used for logging packets to userspace via |
| 3 | * nfetlink. |
| 4 | * |
| 5 | * (C) 2005 by Harald Welte <laforge@netfilter.org> |
Patrick McHardy | f229f6c | 2013-04-06 15:24:29 +0200 | [diff] [blame] | 6 | * (C) 2006-2012 Patrick McHardy <kaber@trash.net> |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 7 | * |
| 8 | * Based on the old ipv4-only ipt_ULOG.c: |
| 9 | * (C) 2000-2004 by Harald Welte <laforge@netfilter.org> |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License version 2 as |
| 13 | * published by the Free Software Foundation. |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 14 | */ |
| 15 | #include <linux/module.h> |
| 16 | #include <linux/skbuff.h> |
Pablo Neira Ayuso | e035edd | 2012-12-17 01:12:00 +0100 | [diff] [blame] | 17 | #include <linux/if_arp.h> |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 18 | #include <linux/init.h> |
| 19 | #include <linux/ip.h> |
| 20 | #include <linux/ipv6.h> |
| 21 | #include <linux/netdevice.h> |
| 22 | #include <linux/netfilter.h> |
Hong zhi guo | 573ce26 | 2013-03-27 06:47:04 +0000 | [diff] [blame] | 23 | #include <net/netlink.h> |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 24 | #include <linux/netfilter/nfnetlink.h> |
| 25 | #include <linux/netfilter/nfnetlink_log.h> |
| 26 | #include <linux/spinlock.h> |
| 27 | #include <linux/sysctl.h> |
| 28 | #include <linux/proc_fs.h> |
| 29 | #include <linux/security.h> |
| 30 | #include <linux/list.h> |
| 31 | #include <linux/jhash.h> |
| 32 | #include <linux/random.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 33 | #include <linux/slab.h> |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 34 | #include <net/sock.h> |
Patrick McHardy | f01ffbd | 2007-12-17 22:38:49 -0800 | [diff] [blame] | 35 | #include <net/netfilter/nf_log.h> |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 36 | #include <net/netns/generic.h> |
Patrick McHardy | d9e1500 | 2008-11-18 12:16:52 +0100 | [diff] [blame] | 37 | #include <net/netfilter/nfnetlink_log.h> |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 38 | |
Arun Sharma | 60063497 | 2011-07-26 16:09:06 -0700 | [diff] [blame] | 39 | #include <linux/atomic.h> |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 40 | |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 41 | #ifdef CONFIG_BRIDGE_NETFILTER |
| 42 | #include "../bridge/br_private.h" |
| 43 | #endif |
| 44 | |
Holger Eitzenberger | c2db292 | 2006-02-04 02:13:14 -0800 | [diff] [blame] | 45 | #define NFULNL_NLBUFSIZ_DEFAULT NLMSG_GOODSIZE |
Eric Leblond | 2c6764b | 2009-02-18 15:29:49 +0100 | [diff] [blame] | 46 | #define NFULNL_TIMEOUT_DEFAULT 100 /* every second */ |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 47 | #define NFULNL_QTHRESH_DEFAULT 100 /* 100 packets */ |
Michal Miroslaw | 6b6ec99 | 2007-09-28 14:45:52 -0700 | [diff] [blame] | 48 | #define NFULNL_COPY_RANGE_MAX 0xFFFF /* max packet size is limited by 16-bit struct nfattr nfa_len field */ |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 49 | |
| 50 | #define PRINTR(x, args...) do { if (net_ratelimit()) \ |
| 51 | printk(x, ## args); } while (0); |
| 52 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 53 | struct nfulnl_instance { |
| 54 | struct hlist_node hlist; /* global list of instances */ |
| 55 | spinlock_t lock; |
| 56 | atomic_t use; /* use count */ |
| 57 | |
| 58 | unsigned int qlen; /* number of nlmsgs in skb */ |
| 59 | struct sk_buff *skb; /* pre-allocatd skb */ |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 60 | struct timer_list timer; |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 61 | struct net *net; |
Eric W. Biederman | 9eea951 | 2012-05-25 10:42:54 -0600 | [diff] [blame] | 62 | struct user_namespace *peer_user_ns; /* User namespace of the peer process */ |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 63 | int peer_portid; /* PORTID of the peer process */ |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 64 | |
| 65 | /* configurable parameters */ |
| 66 | unsigned int flushtimeout; /* timeout until queue flush */ |
| 67 | unsigned int nlbufsiz; /* netlink buffer allocation size */ |
| 68 | unsigned int qthreshold; /* threshold of the queue */ |
| 69 | u_int32_t copy_range; |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 70 | u_int32_t seq; /* instance-local sequential counter */ |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 71 | u_int16_t group_num; /* number of this queue */ |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 72 | u_int16_t flags; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 73 | u_int8_t copy_mode; |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 74 | struct rcu_head rcu; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 75 | }; |
| 76 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 77 | #define INSTANCE_BUCKETS 16 |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 78 | static unsigned int hash_init; |
| 79 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 80 | static int nfnl_log_net_id __read_mostly; |
| 81 | |
| 82 | struct nfnl_log_net { |
| 83 | spinlock_t instances_lock; |
| 84 | struct hlist_head instance_table[INSTANCE_BUCKETS]; |
| 85 | atomic_t global_seq; |
| 86 | }; |
| 87 | |
| 88 | static struct nfnl_log_net *nfnl_log_pernet(struct net *net) |
| 89 | { |
| 90 | return net_generic(net, nfnl_log_net_id); |
| 91 | } |
| 92 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 93 | static inline u_int8_t instance_hashfn(u_int16_t group_num) |
| 94 | { |
| 95 | return ((group_num & 0xff) % INSTANCE_BUCKETS); |
| 96 | } |
| 97 | |
| 98 | static struct nfulnl_instance * |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 99 | __instance_lookup(struct nfnl_log_net *log, u_int16_t group_num) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 100 | { |
| 101 | struct hlist_head *head; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 102 | struct nfulnl_instance *inst; |
| 103 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 104 | head = &log->instance_table[instance_hashfn(group_num)]; |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 105 | hlist_for_each_entry_rcu(inst, head, hlist) { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 106 | if (inst->group_num == group_num) |
| 107 | return inst; |
| 108 | } |
| 109 | return NULL; |
| 110 | } |
| 111 | |
| 112 | static inline void |
| 113 | instance_get(struct nfulnl_instance *inst) |
| 114 | { |
| 115 | atomic_inc(&inst->use); |
| 116 | } |
| 117 | |
| 118 | static struct nfulnl_instance * |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 119 | instance_lookup_get(struct nfnl_log_net *log, u_int16_t group_num) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 120 | { |
| 121 | struct nfulnl_instance *inst; |
| 122 | |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 123 | rcu_read_lock_bh(); |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 124 | inst = __instance_lookup(log, group_num); |
Eric Dumazet | f5c5440 | 2010-06-14 16:15:23 +0200 | [diff] [blame] | 125 | if (inst && !atomic_inc_not_zero(&inst->use)) |
| 126 | inst = NULL; |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 127 | rcu_read_unlock_bh(); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 128 | |
| 129 | return inst; |
| 130 | } |
| 131 | |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 132 | static void nfulnl_instance_free_rcu(struct rcu_head *head) |
| 133 | { |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 134 | struct nfulnl_instance *inst = |
| 135 | container_of(head, struct nfulnl_instance, rcu); |
| 136 | |
| 137 | put_net(inst->net); |
| 138 | kfree(inst); |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 139 | module_put(THIS_MODULE); |
| 140 | } |
| 141 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 142 | static void |
| 143 | instance_put(struct nfulnl_instance *inst) |
| 144 | { |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 145 | if (inst && atomic_dec_and_test(&inst->use)) |
| 146 | call_rcu_bh(&inst->rcu, nfulnl_instance_free_rcu); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 147 | } |
| 148 | |
| 149 | static void nfulnl_timer(unsigned long data); |
| 150 | |
| 151 | static struct nfulnl_instance * |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 152 | instance_create(struct net *net, u_int16_t group_num, |
| 153 | int portid, struct user_namespace *user_ns) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 154 | { |
| 155 | struct nfulnl_instance *inst; |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 156 | struct nfnl_log_net *log = nfnl_log_pernet(net); |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 157 | int err; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 158 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 159 | spin_lock_bh(&log->instances_lock); |
| 160 | if (__instance_lookup(log, group_num)) { |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 161 | err = -EEXIST; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 162 | goto out_unlock; |
| 163 | } |
| 164 | |
Harald Welte | 10dfdc6 | 2005-11-03 19:20:07 +0100 | [diff] [blame] | 165 | inst = kzalloc(sizeof(*inst), GFP_ATOMIC); |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 166 | if (!inst) { |
| 167 | err = -ENOMEM; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 168 | goto out_unlock; |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 169 | } |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 170 | |
Michal Miroslaw | aace57e | 2007-09-28 14:45:27 -0700 | [diff] [blame] | 171 | if (!try_module_get(THIS_MODULE)) { |
| 172 | kfree(inst); |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 173 | err = -EAGAIN; |
Michal Miroslaw | aace57e | 2007-09-28 14:45:27 -0700 | [diff] [blame] | 174 | goto out_unlock; |
| 175 | } |
| 176 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 177 | INIT_HLIST_NODE(&inst->hlist); |
YOSHIFUJI Hideaki | 181a46a | 2006-01-04 13:56:54 -0800 | [diff] [blame] | 178 | spin_lock_init(&inst->lock); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 179 | /* needs to be two, since we _put() after creation */ |
| 180 | atomic_set(&inst->use, 2); |
| 181 | |
Patrick McHardy | e6f689d | 2007-03-23 11:16:30 -0700 | [diff] [blame] | 182 | setup_timer(&inst->timer, nfulnl_timer, (unsigned long)inst); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 183 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 184 | inst->net = get_net(net); |
Eric W. Biederman | 9eea951 | 2012-05-25 10:42:54 -0600 | [diff] [blame] | 185 | inst->peer_user_ns = user_ns; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 186 | inst->peer_portid = portid; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 187 | inst->group_num = group_num; |
| 188 | |
| 189 | inst->qthreshold = NFULNL_QTHRESH_DEFAULT; |
| 190 | inst->flushtimeout = NFULNL_TIMEOUT_DEFAULT; |
| 191 | inst->nlbufsiz = NFULNL_NLBUFSIZ_DEFAULT; |
| 192 | inst->copy_mode = NFULNL_COPY_PACKET; |
Michal Miroslaw | 6b6ec99 | 2007-09-28 14:45:52 -0700 | [diff] [blame] | 193 | inst->copy_range = NFULNL_COPY_RANGE_MAX; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 194 | |
Eric Dumazet | f5c5440 | 2010-06-14 16:15:23 +0200 | [diff] [blame] | 195 | hlist_add_head_rcu(&inst->hlist, |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 196 | &log->instance_table[instance_hashfn(group_num)]); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 197 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 198 | |
| 199 | spin_unlock_bh(&log->instances_lock); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 200 | |
| 201 | return inst; |
| 202 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 203 | out_unlock: |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 204 | spin_unlock_bh(&log->instances_lock); |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 205 | return ERR_PTR(err); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 206 | } |
| 207 | |
Michal Miroslaw | e356706 | 2007-09-28 14:44:21 -0700 | [diff] [blame] | 208 | static void __nfulnl_flush(struct nfulnl_instance *inst); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 209 | |
Eric Dumazet | f5c5440 | 2010-06-14 16:15:23 +0200 | [diff] [blame] | 210 | /* called with BH disabled */ |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 211 | static void |
Patrick McHardy | 9afdb00 | 2007-03-23 11:12:50 -0700 | [diff] [blame] | 212 | __instance_destroy(struct nfulnl_instance *inst) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 213 | { |
| 214 | /* first pull it out of the global list */ |
Eric Dumazet | f5c5440 | 2010-06-14 16:15:23 +0200 | [diff] [blame] | 215 | hlist_del_rcu(&inst->hlist); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 216 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 217 | /* then flush all pending packets from skb */ |
| 218 | |
Eric Dumazet | f5c5440 | 2010-06-14 16:15:23 +0200 | [diff] [blame] | 219 | spin_lock(&inst->lock); |
| 220 | |
| 221 | /* lockless readers wont be able to use us */ |
| 222 | inst->copy_mode = NFULNL_COPY_DISABLED; |
| 223 | |
Michal Miroslaw | e356706 | 2007-09-28 14:44:21 -0700 | [diff] [blame] | 224 | if (inst->skb) |
| 225 | __nfulnl_flush(inst); |
Eric Dumazet | f5c5440 | 2010-06-14 16:15:23 +0200 | [diff] [blame] | 226 | spin_unlock(&inst->lock); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 227 | |
| 228 | /* and finally put the refcount */ |
| 229 | instance_put(inst); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 230 | } |
| 231 | |
| 232 | static inline void |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 233 | instance_destroy(struct nfnl_log_net *log, |
| 234 | struct nfulnl_instance *inst) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 235 | { |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 236 | spin_lock_bh(&log->instances_lock); |
Patrick McHardy | 9afdb00 | 2007-03-23 11:12:50 -0700 | [diff] [blame] | 237 | __instance_destroy(inst); |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 238 | spin_unlock_bh(&log->instances_lock); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 239 | } |
| 240 | |
| 241 | static int |
| 242 | nfulnl_set_mode(struct nfulnl_instance *inst, u_int8_t mode, |
| 243 | unsigned int range) |
| 244 | { |
| 245 | int status = 0; |
| 246 | |
| 247 | spin_lock_bh(&inst->lock); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 248 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 249 | switch (mode) { |
| 250 | case NFULNL_COPY_NONE: |
| 251 | case NFULNL_COPY_META: |
| 252 | inst->copy_mode = mode; |
| 253 | inst->copy_range = 0; |
| 254 | break; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 255 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 256 | case NFULNL_COPY_PACKET: |
| 257 | inst->copy_mode = mode; |
Michal Miroslaw | 6b6ec99 | 2007-09-28 14:45:52 -0700 | [diff] [blame] | 258 | inst->copy_range = min_t(unsigned int, |
| 259 | range, NFULNL_COPY_RANGE_MAX); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 260 | break; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 261 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 262 | default: |
| 263 | status = -EINVAL; |
| 264 | break; |
| 265 | } |
| 266 | |
| 267 | spin_unlock_bh(&inst->lock); |
| 268 | |
| 269 | return status; |
| 270 | } |
| 271 | |
| 272 | static int |
| 273 | nfulnl_set_nlbufsiz(struct nfulnl_instance *inst, u_int32_t nlbufsiz) |
| 274 | { |
| 275 | int status; |
| 276 | |
| 277 | spin_lock_bh(&inst->lock); |
| 278 | if (nlbufsiz < NFULNL_NLBUFSIZ_DEFAULT) |
| 279 | status = -ERANGE; |
| 280 | else if (nlbufsiz > 131072) |
| 281 | status = -ERANGE; |
| 282 | else { |
| 283 | inst->nlbufsiz = nlbufsiz; |
| 284 | status = 0; |
| 285 | } |
| 286 | spin_unlock_bh(&inst->lock); |
| 287 | |
| 288 | return status; |
| 289 | } |
| 290 | |
| 291 | static int |
| 292 | nfulnl_set_timeout(struct nfulnl_instance *inst, u_int32_t timeout) |
| 293 | { |
| 294 | spin_lock_bh(&inst->lock); |
| 295 | inst->flushtimeout = timeout; |
| 296 | spin_unlock_bh(&inst->lock); |
| 297 | |
| 298 | return 0; |
| 299 | } |
| 300 | |
| 301 | static int |
| 302 | nfulnl_set_qthresh(struct nfulnl_instance *inst, u_int32_t qthresh) |
| 303 | { |
| 304 | spin_lock_bh(&inst->lock); |
| 305 | inst->qthreshold = qthresh; |
| 306 | spin_unlock_bh(&inst->lock); |
| 307 | |
| 308 | return 0; |
| 309 | } |
| 310 | |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 311 | static int |
| 312 | nfulnl_set_flags(struct nfulnl_instance *inst, u_int16_t flags) |
| 313 | { |
| 314 | spin_lock_bh(&inst->lock); |
Patrick McHardy | ee43353 | 2006-05-19 02:17:18 -0700 | [diff] [blame] | 315 | inst->flags = flags; |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 316 | spin_unlock_bh(&inst->lock); |
| 317 | |
| 318 | return 0; |
| 319 | } |
| 320 | |
Michal Miroslaw | c6a8f64 | 2007-09-28 14:45:06 -0700 | [diff] [blame] | 321 | static struct sk_buff * |
Gao feng | afff14f | 2013-09-23 19:20:56 +0800 | [diff] [blame] | 322 | nfulnl_alloc_skb(struct net *net, u32 peer_portid, unsigned int inst_size, |
| 323 | unsigned int pkt_size) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 324 | { |
| 325 | struct sk_buff *skb; |
Patrick McHardy | ad2ad0f | 2006-02-04 02:13:57 -0800 | [diff] [blame] | 326 | unsigned int n; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 327 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 328 | /* alloc skb which should be big enough for a whole multipart |
| 329 | * message. WARNING: has to be <= 128k due to slab restrictions */ |
| 330 | |
Patrick McHardy | ad2ad0f | 2006-02-04 02:13:57 -0800 | [diff] [blame] | 331 | n = max(inst_size, pkt_size); |
Gao feng | afff14f | 2013-09-23 19:20:56 +0800 | [diff] [blame] | 332 | skb = nfnetlink_alloc_skb(net, n, peer_portid, GFP_ATOMIC); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 333 | if (!skb) { |
Patrick McHardy | ad2ad0f | 2006-02-04 02:13:57 -0800 | [diff] [blame] | 334 | if (n > pkt_size) { |
| 335 | /* try to allocate only as much as we need for current |
| 336 | * packet */ |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 337 | |
Gao feng | afff14f | 2013-09-23 19:20:56 +0800 | [diff] [blame] | 338 | skb = nfnetlink_alloc_skb(net, pkt_size, |
Patrick McHardy | 3ab1f68 | 2013-04-17 06:47:09 +0000 | [diff] [blame] | 339 | peer_portid, GFP_ATOMIC); |
Patrick McHardy | ad2ad0f | 2006-02-04 02:13:57 -0800 | [diff] [blame] | 340 | if (!skb) |
Joe Perches | 0a9ee81 | 2011-08-29 14:17:25 -0700 | [diff] [blame] | 341 | pr_err("nfnetlink_log: can't even alloc %u bytes\n", |
| 342 | pkt_size); |
Patrick McHardy | ad2ad0f | 2006-02-04 02:13:57 -0800 | [diff] [blame] | 343 | } |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 344 | } |
| 345 | |
| 346 | return skb; |
| 347 | } |
| 348 | |
| 349 | static int |
| 350 | __nfulnl_send(struct nfulnl_instance *inst) |
| 351 | { |
Eric Leblond | 29c5d4a | 2007-09-18 13:07:15 -0700 | [diff] [blame] | 352 | int status = -1; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 353 | |
David S. Miller | d550d09 | 2012-06-26 21:34:03 -0700 | [diff] [blame] | 354 | if (inst->qlen > 1) { |
| 355 | struct nlmsghdr *nlh = nlmsg_put(inst->skb, 0, 0, |
| 356 | NLMSG_DONE, |
| 357 | sizeof(struct nfgenmsg), |
| 358 | 0); |
| 359 | if (!nlh) |
| 360 | goto out; |
| 361 | } |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 362 | status = nfnetlink_unicast(inst->skb, inst->net, inst->peer_portid, |
Alexey Dobriyan | cd8c20b | 2010-01-13 16:02:14 +0100 | [diff] [blame] | 363 | MSG_DONTWAIT); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 364 | |
| 365 | inst->qlen = 0; |
| 366 | inst->skb = NULL; |
David S. Miller | d550d09 | 2012-06-26 21:34:03 -0700 | [diff] [blame] | 367 | out: |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 368 | return status; |
| 369 | } |
| 370 | |
Michal Miroslaw | e356706 | 2007-09-28 14:44:21 -0700 | [diff] [blame] | 371 | static void |
| 372 | __nfulnl_flush(struct nfulnl_instance *inst) |
| 373 | { |
| 374 | /* timer holds a reference */ |
| 375 | if (del_timer(&inst->timer)) |
| 376 | instance_put(inst); |
| 377 | if (inst->skb) |
| 378 | __nfulnl_send(inst); |
| 379 | } |
| 380 | |
Michal Miroslaw | c6a8f64 | 2007-09-28 14:45:06 -0700 | [diff] [blame] | 381 | static void |
| 382 | nfulnl_timer(unsigned long data) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 383 | { |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 384 | struct nfulnl_instance *inst = (struct nfulnl_instance *)data; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 385 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 386 | spin_lock_bh(&inst->lock); |
Michal Miroslaw | 370e6a8 | 2007-03-23 11:12:21 -0700 | [diff] [blame] | 387 | if (inst->skb) |
| 388 | __nfulnl_send(inst); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 389 | spin_unlock_bh(&inst->lock); |
Michal Miroslaw | 05f7b7b | 2007-03-04 15:58:40 -0800 | [diff] [blame] | 390 | instance_put(inst); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 391 | } |
| 392 | |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 393 | /* This is an inline function, we don't really care about a long |
| 394 | * list of arguments */ |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 395 | static inline int |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 396 | __build_packet_message(struct nfnl_log_net *log, |
| 397 | struct nfulnl_instance *inst, |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 398 | const struct sk_buff *skb, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 399 | unsigned int data_len, |
Jan Engelhardt | 76108ce | 2008-10-08 11:35:00 +0200 | [diff] [blame] | 400 | u_int8_t pf, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 401 | unsigned int hooknum, |
| 402 | const struct net_device *indev, |
| 403 | const struct net_device *outdev, |
Patrick McHardy | d7a5c32 | 2006-11-29 02:35:34 +0100 | [diff] [blame] | 404 | const char *prefix, unsigned int plen) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 405 | { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 406 | struct nfulnl_msg_packet_hdr pmsg; |
| 407 | struct nlmsghdr *nlh; |
| 408 | struct nfgenmsg *nfmsg; |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 409 | sk_buff_data_t old_tail = inst->skb->tail; |
Eric Dumazet | 0626af3 | 2012-09-04 07:49:03 +0000 | [diff] [blame] | 410 | struct sock *sk; |
Bob Hockney | 0c36b48 | 2012-12-16 19:34:11 +0100 | [diff] [blame] | 411 | const unsigned char *hwhdrp; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 412 | |
David S. Miller | d550d09 | 2012-06-26 21:34:03 -0700 | [diff] [blame] | 413 | nlh = nlmsg_put(inst->skb, 0, 0, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 414 | NFNL_SUBSYS_ULOG << 8 | NFULNL_MSG_PACKET, |
David S. Miller | d550d09 | 2012-06-26 21:34:03 -0700 | [diff] [blame] | 415 | sizeof(struct nfgenmsg), 0); |
| 416 | if (!nlh) |
| 417 | return -1; |
| 418 | nfmsg = nlmsg_data(nlh); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 419 | nfmsg->nfgen_family = pf; |
| 420 | nfmsg->version = NFNETLINK_V0; |
| 421 | nfmsg->res_id = htons(inst->group_num); |
| 422 | |
Dan Carpenter | e4d091d | 2013-08-01 12:36:57 +0300 | [diff] [blame] | 423 | memset(&pmsg, 0, sizeof(pmsg)); |
Al Viro | febf0a4 | 2006-11-03 00:59:17 -0800 | [diff] [blame] | 424 | pmsg.hw_protocol = skb->protocol; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 425 | pmsg.hook = hooknum; |
| 426 | |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 427 | if (nla_put(inst->skb, NFULA_PACKET_HDR, sizeof(pmsg), &pmsg)) |
| 428 | goto nla_put_failure; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 429 | |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 430 | if (prefix && |
| 431 | nla_put(inst->skb, NFULA_PREFIX, plen, prefix)) |
| 432 | goto nla_put_failure; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 433 | |
| 434 | if (indev) { |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 435 | #ifndef CONFIG_BRIDGE_NETFILTER |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 436 | if (nla_put_be32(inst->skb, NFULA_IFINDEX_INDEV, |
| 437 | htonl(indev->ifindex))) |
| 438 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 439 | #else |
| 440 | if (pf == PF_BRIDGE) { |
| 441 | /* Case 1: outdev is physical input device, we need to |
| 442 | * look for bridge group (when called from |
| 443 | * netfilter_bridge) */ |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 444 | if (nla_put_be32(inst->skb, NFULA_IFINDEX_PHYSINDEV, |
| 445 | htonl(indev->ifindex)) || |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 446 | /* this is the bridge group "brX" */ |
Jiri Pirko | f350a0a8 | 2010-06-15 06:50:45 +0000 | [diff] [blame] | 447 | /* rcu_read_lock()ed by nf_hook_slow or nf_log_packet */ |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 448 | nla_put_be32(inst->skb, NFULA_IFINDEX_INDEV, |
| 449 | htonl(br_port_get_rcu(indev)->br->dev->ifindex))) |
| 450 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 451 | } else { |
| 452 | /* Case 2: indev is bridge group, we need to look for |
| 453 | * physical device (when called from ipv4) */ |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 454 | if (nla_put_be32(inst->skb, NFULA_IFINDEX_INDEV, |
| 455 | htonl(indev->ifindex))) |
| 456 | goto nla_put_failure; |
| 457 | if (skb->nf_bridge && skb->nf_bridge->physindev && |
| 458 | nla_put_be32(inst->skb, NFULA_IFINDEX_PHYSINDEV, |
| 459 | htonl(skb->nf_bridge->physindev->ifindex))) |
| 460 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 461 | } |
| 462 | #endif |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 463 | } |
| 464 | |
| 465 | if (outdev) { |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 466 | #ifndef CONFIG_BRIDGE_NETFILTER |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 467 | if (nla_put_be32(inst->skb, NFULA_IFINDEX_OUTDEV, |
| 468 | htonl(outdev->ifindex))) |
| 469 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 470 | #else |
| 471 | if (pf == PF_BRIDGE) { |
| 472 | /* Case 1: outdev is physical output device, we need to |
| 473 | * look for bridge group (when called from |
| 474 | * netfilter_bridge) */ |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 475 | if (nla_put_be32(inst->skb, NFULA_IFINDEX_PHYSOUTDEV, |
| 476 | htonl(outdev->ifindex)) || |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 477 | /* this is the bridge group "brX" */ |
Jiri Pirko | f350a0a8 | 2010-06-15 06:50:45 +0000 | [diff] [blame] | 478 | /* rcu_read_lock()ed by nf_hook_slow or nf_log_packet */ |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 479 | nla_put_be32(inst->skb, NFULA_IFINDEX_OUTDEV, |
| 480 | htonl(br_port_get_rcu(outdev)->br->dev->ifindex))) |
| 481 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 482 | } else { |
| 483 | /* Case 2: indev is a bridge group, we need to look |
| 484 | * for physical device (when called from ipv4) */ |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 485 | if (nla_put_be32(inst->skb, NFULA_IFINDEX_OUTDEV, |
| 486 | htonl(outdev->ifindex))) |
| 487 | goto nla_put_failure; |
| 488 | if (skb->nf_bridge && skb->nf_bridge->physoutdev && |
| 489 | nla_put_be32(inst->skb, NFULA_IFINDEX_PHYSOUTDEV, |
| 490 | htonl(skb->nf_bridge->physoutdev->ifindex))) |
| 491 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 492 | } |
| 493 | #endif |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 494 | } |
| 495 | |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 496 | if (skb->mark && |
| 497 | nla_put_be32(inst->skb, NFULA_MARK, htonl(skb->mark))) |
| 498 | goto nla_put_failure; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 499 | |
Nicolas Cavallari | 2c38de4 | 2011-06-16 17:27:04 +0200 | [diff] [blame] | 500 | if (indev && skb->dev && |
| 501 | skb->mac_header != skb->network_header) { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 502 | struct nfulnl_msg_packet_hw phw; |
Dan Carpenter | e4d091d | 2013-08-01 12:36:57 +0300 | [diff] [blame] | 503 | int len; |
| 504 | |
| 505 | memset(&phw, 0, sizeof(phw)); |
| 506 | len = dev_parse_header(skb, phw.hw_addr); |
Stephen Hemminger | b95cce3 | 2007-09-26 22:13:38 -0700 | [diff] [blame] | 507 | if (len > 0) { |
| 508 | phw.hw_addrlen = htons(len); |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 509 | if (nla_put(inst->skb, NFULA_HWADDR, sizeof(phw), &phw)) |
| 510 | goto nla_put_failure; |
Stephen Hemminger | b95cce3 | 2007-09-26 22:13:38 -0700 | [diff] [blame] | 511 | } |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 512 | } |
| 513 | |
Eric Leblond | 72961ec | 2008-07-21 10:02:35 -0700 | [diff] [blame] | 514 | if (indev && skb_mac_header_was_set(skb)) { |
Patrick McHardy | 2dba62c | 2012-08-19 10:16:08 +0000 | [diff] [blame] | 515 | if (nla_put_be16(inst->skb, NFULA_HWTYPE, htons(skb->dev->type)) || |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 516 | nla_put_be16(inst->skb, NFULA_HWLEN, |
Bob Hockney | 0c36b48 | 2012-12-16 19:34:11 +0100 | [diff] [blame] | 517 | htons(skb->dev->hard_header_len))) |
| 518 | goto nla_put_failure; |
| 519 | |
| 520 | hwhdrp = skb_mac_header(skb); |
| 521 | |
| 522 | if (skb->dev->type == ARPHRD_SIT) |
| 523 | hwhdrp -= ETH_HLEN; |
| 524 | |
| 525 | if (hwhdrp >= skb->head && |
| 526 | nla_put(inst->skb, NFULA_HWHEADER, |
| 527 | skb->dev->hard_header_len, hwhdrp)) |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 528 | goto nla_put_failure; |
Eric Leblond | 72961ec | 2008-07-21 10:02:35 -0700 | [diff] [blame] | 529 | } |
| 530 | |
Eric Dumazet | b7aa0bf | 2007-04-19 16:16:32 -0700 | [diff] [blame] | 531 | if (skb->tstamp.tv64) { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 532 | struct nfulnl_msg_packet_timestamp ts; |
Eric Dumazet | b7aa0bf | 2007-04-19 16:16:32 -0700 | [diff] [blame] | 533 | struct timeval tv = ktime_to_timeval(skb->tstamp); |
| 534 | ts.sec = cpu_to_be64(tv.tv_sec); |
| 535 | ts.usec = cpu_to_be64(tv.tv_usec); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 536 | |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 537 | if (nla_put(inst->skb, NFULA_TIMESTAMP, sizeof(ts), &ts)) |
| 538 | goto nla_put_failure; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 539 | } |
| 540 | |
| 541 | /* UID */ |
Eric Dumazet | 0626af3 | 2012-09-04 07:49:03 +0000 | [diff] [blame] | 542 | sk = skb->sk; |
| 543 | if (sk && sk->sk_state != TCP_TIME_WAIT) { |
| 544 | read_lock_bh(&sk->sk_callback_lock); |
| 545 | if (sk->sk_socket && sk->sk_socket->file) { |
| 546 | struct file *file = sk->sk_socket->file; |
Linus Torvalds | 437589a | 2012-10-02 11:11:09 -0700 | [diff] [blame] | 547 | const struct cred *cred = file->f_cred; |
| 548 | struct user_namespace *user_ns = inst->peer_user_ns; |
| 549 | __be32 uid = htonl(from_kuid_munged(user_ns, cred->fsuid)); |
| 550 | __be32 gid = htonl(from_kgid_munged(user_ns, cred->fsgid)); |
Eric Dumazet | 0626af3 | 2012-09-04 07:49:03 +0000 | [diff] [blame] | 551 | read_unlock_bh(&sk->sk_callback_lock); |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 552 | if (nla_put_be32(inst->skb, NFULA_UID, uid) || |
| 553 | nla_put_be32(inst->skb, NFULA_GID, gid)) |
| 554 | goto nla_put_failure; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 555 | } else |
Eric Dumazet | 0626af3 | 2012-09-04 07:49:03 +0000 | [diff] [blame] | 556 | read_unlock_bh(&sk->sk_callback_lock); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 557 | } |
| 558 | |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 559 | /* local sequence number */ |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 560 | if ((inst->flags & NFULNL_CFG_F_SEQ) && |
| 561 | nla_put_be32(inst->skb, NFULA_SEQ, htonl(inst->seq++))) |
| 562 | goto nla_put_failure; |
Patrick McHardy | 0dfedd2 | 2007-12-17 22:41:35 -0800 | [diff] [blame] | 563 | |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 564 | /* global sequence number */ |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 565 | if ((inst->flags & NFULNL_CFG_F_SEQ_GLOBAL) && |
| 566 | nla_put_be32(inst->skb, NFULA_SEQ_GLOBAL, |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 567 | htonl(atomic_inc_return(&log->global_seq)))) |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 568 | goto nla_put_failure; |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 569 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 570 | if (data_len) { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 571 | struct nlattr *nla; |
| 572 | int size = nla_attr_size(data_len); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 573 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 574 | if (skb_tailroom(inst->skb) < nla_total_size(data_len)) { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 575 | printk(KERN_WARNING "nfnetlink_log: no tailroom!\n"); |
David S. Miller | d550d09 | 2012-06-26 21:34:03 -0700 | [diff] [blame] | 576 | return -1; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 577 | } |
| 578 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 579 | nla = (struct nlattr *)skb_put(inst->skb, nla_total_size(data_len)); |
| 580 | nla->nla_type = NFULA_PAYLOAD; |
| 581 | nla->nla_len = size; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 582 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 583 | if (skb_copy_bits(skb, 0, nla_data(nla), data_len)) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 584 | BUG(); |
| 585 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 586 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 587 | nlh->nlmsg_len = inst->skb->tail - old_tail; |
| 588 | return 0; |
| 589 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 590 | nla_put_failure: |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 591 | PRINTR(KERN_ERR "nfnetlink_log: error creating log nlmsg\n"); |
| 592 | return -1; |
| 593 | } |
| 594 | |
| 595 | #define RCV_SKB_FAIL(err) do { netlink_ack(skb, nlh, (err)); return; } while (0) |
| 596 | |
| 597 | static struct nf_loginfo default_loginfo = { |
| 598 | .type = NF_LOG_TYPE_ULOG, |
| 599 | .u = { |
| 600 | .ulog = { |
| 601 | .copy_len = 0xffff, |
| 602 | .group = 0, |
| 603 | .qthreshold = 1, |
| 604 | }, |
| 605 | }, |
| 606 | }; |
| 607 | |
| 608 | /* log handler for internal netfilter logging api */ |
Eric Leblond | 5f7340e | 2008-11-04 14:21:08 +0100 | [diff] [blame] | 609 | void |
Hans Schillstrom | 8cdb46d | 2013-05-15 01:23:45 +0000 | [diff] [blame] | 610 | nfulnl_log_packet(struct net *net, |
| 611 | u_int8_t pf, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 612 | unsigned int hooknum, |
| 613 | const struct sk_buff *skb, |
| 614 | const struct net_device *in, |
| 615 | const struct net_device *out, |
| 616 | const struct nf_loginfo *li_user, |
| 617 | const char *prefix) |
| 618 | { |
| 619 | unsigned int size, data_len; |
| 620 | struct nfulnl_instance *inst; |
| 621 | const struct nf_loginfo *li; |
| 622 | unsigned int qthreshold; |
Patrick McHardy | d7a5c32 | 2006-11-29 02:35:34 +0100 | [diff] [blame] | 623 | unsigned int plen; |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 624 | struct nfnl_log_net *log = nfnl_log_pernet(net); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 625 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 626 | if (li_user && li_user->type == NF_LOG_TYPE_ULOG) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 627 | li = li_user; |
| 628 | else |
| 629 | li = &default_loginfo; |
| 630 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 631 | inst = instance_lookup_get(log, li->u.ulog.group); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 632 | if (!inst) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 633 | return; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 634 | |
Patrick McHardy | d7a5c32 | 2006-11-29 02:35:34 +0100 | [diff] [blame] | 635 | plen = 0; |
| 636 | if (prefix) |
Patrick McHardy | 881dbfe | 2007-03-06 20:24:35 -0800 | [diff] [blame] | 637 | plen = strlen(prefix) + 1; |
Patrick McHardy | d7a5c32 | 2006-11-29 02:35:34 +0100 | [diff] [blame] | 638 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 639 | /* FIXME: do we want to make the size calculation conditional based on |
| 640 | * what is actually present? way more branches and checks, but more |
| 641 | * memory efficient... */ |
Hong zhi guo | 573ce26 | 2013-03-27 06:47:04 +0000 | [diff] [blame] | 642 | size = nlmsg_total_size(sizeof(struct nfgenmsg)) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 643 | + nla_total_size(sizeof(struct nfulnl_msg_packet_hdr)) |
| 644 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
| 645 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 646 | #ifdef CONFIG_BRIDGE_NETFILTER |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 647 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
| 648 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 649 | #endif |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 650 | + nla_total_size(sizeof(u_int32_t)) /* mark */ |
| 651 | + nla_total_size(sizeof(u_int32_t)) /* uid */ |
Patrick McHardy | 76aa1ce | 2007-12-17 22:41:52 -0800 | [diff] [blame] | 652 | + nla_total_size(sizeof(u_int32_t)) /* gid */ |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 653 | + nla_total_size(plen) /* prefix */ |
| 654 | + nla_total_size(sizeof(struct nfulnl_msg_packet_hw)) |
| 655 | + nla_total_size(sizeof(struct nfulnl_msg_packet_timestamp)); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 656 | |
Pablo Neira Ayuso | eeff9be | 2009-05-27 15:49:11 +0200 | [diff] [blame] | 657 | if (in && skb_mac_header_was_set(skb)) { |
| 658 | size += nla_total_size(skb->dev->hard_header_len) |
| 659 | + nla_total_size(sizeof(u_int16_t)) /* hwtype */ |
| 660 | + nla_total_size(sizeof(u_int16_t)); /* hwlen */ |
| 661 | } |
| 662 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 663 | spin_lock_bh(&inst->lock); |
| 664 | |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 665 | if (inst->flags & NFULNL_CFG_F_SEQ) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 666 | size += nla_total_size(sizeof(u_int32_t)); |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 667 | if (inst->flags & NFULNL_CFG_F_SEQ_GLOBAL) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 668 | size += nla_total_size(sizeof(u_int32_t)); |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 669 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 670 | qthreshold = inst->qthreshold; |
| 671 | /* per-rule qthreshold overrides per-instance */ |
Eric Leblond | 5ca431f | 2009-02-18 15:29:23 +0100 | [diff] [blame] | 672 | if (li->u.ulog.qthreshold) |
| 673 | if (qthreshold > li->u.ulog.qthreshold) |
| 674 | qthreshold = li->u.ulog.qthreshold; |
| 675 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 676 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 677 | switch (inst->copy_mode) { |
| 678 | case NFULNL_COPY_META: |
| 679 | case NFULNL_COPY_NONE: |
| 680 | data_len = 0; |
| 681 | break; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 682 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 683 | case NFULNL_COPY_PACKET: |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 684 | if (inst->copy_range == 0 |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 685 | || inst->copy_range > skb->len) |
| 686 | data_len = skb->len; |
| 687 | else |
| 688 | data_len = inst->copy_range; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 689 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 690 | size += nla_total_size(data_len); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 691 | break; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 692 | |
Eric Dumazet | f5c5440 | 2010-06-14 16:15:23 +0200 | [diff] [blame] | 693 | case NFULNL_COPY_DISABLED: |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 694 | default: |
Michal Miroslaw | 55b5a91 | 2007-03-23 11:11:05 -0700 | [diff] [blame] | 695 | goto unlock_and_release; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 696 | } |
| 697 | |
Michal Miroslaw | d63b043 | 2007-09-28 14:44:44 -0700 | [diff] [blame] | 698 | if (inst->skb && |
| 699 | size > skb_tailroom(inst->skb) - sizeof(struct nfgenmsg)) { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 700 | /* either the queue len is too high or we don't have |
| 701 | * enough room in the skb left. flush to userspace. */ |
Michal Miroslaw | e356706 | 2007-09-28 14:44:21 -0700 | [diff] [blame] | 702 | __nfulnl_flush(inst); |
Michal Miroslaw | 55b5a91 | 2007-03-23 11:11:05 -0700 | [diff] [blame] | 703 | } |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 704 | |
Michal Miroslaw | 55b5a91 | 2007-03-23 11:11:05 -0700 | [diff] [blame] | 705 | if (!inst->skb) { |
Gao feng | afff14f | 2013-09-23 19:20:56 +0800 | [diff] [blame] | 706 | inst->skb = nfulnl_alloc_skb(net, inst->peer_portid, |
| 707 | inst->nlbufsiz, size); |
Michal Miroslaw | 55b5a91 | 2007-03-23 11:11:05 -0700 | [diff] [blame] | 708 | if (!inst->skb) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 709 | goto alloc_failure; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 710 | } |
| 711 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 712 | inst->qlen++; |
| 713 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 714 | __build_packet_message(log, inst, skb, data_len, pf, |
Florian Westphal | 8248779 | 2011-02-15 21:59:37 +0100 | [diff] [blame] | 715 | hooknum, in, out, prefix, plen); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 716 | |
Michal Miroslaw | d63b043 | 2007-09-28 14:44:44 -0700 | [diff] [blame] | 717 | if (inst->qlen >= qthreshold) |
| 718 | __nfulnl_flush(inst); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 719 | /* timer_pending always called within inst->lock, so there |
| 720 | * is no chance of a race here */ |
Michal Miroslaw | d63b043 | 2007-09-28 14:44:44 -0700 | [diff] [blame] | 721 | else if (!timer_pending(&inst->timer)) { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 722 | instance_get(inst); |
| 723 | inst->timer.expires = jiffies + (inst->flushtimeout*HZ/100); |
| 724 | add_timer(&inst->timer); |
| 725 | } |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 726 | |
Michal Miroslaw | ed32abe | 2007-03-04 15:58:15 -0800 | [diff] [blame] | 727 | unlock_and_release: |
| 728 | spin_unlock_bh(&inst->lock); |
| 729 | instance_put(inst); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 730 | return; |
| 731 | |
| 732 | alloc_failure: |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 733 | /* FIXME: statistics */ |
Michal Miroslaw | ed32abe | 2007-03-04 15:58:15 -0800 | [diff] [blame] | 734 | goto unlock_and_release; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 735 | } |
Eric Leblond | 5f7340e | 2008-11-04 14:21:08 +0100 | [diff] [blame] | 736 | EXPORT_SYMBOL_GPL(nfulnl_log_packet); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 737 | |
| 738 | static int |
| 739 | nfulnl_rcv_nl_event(struct notifier_block *this, |
| 740 | unsigned long event, void *ptr) |
| 741 | { |
| 742 | struct netlink_notify *n = ptr; |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 743 | struct nfnl_log_net *log = nfnl_log_pernet(n->net); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 744 | |
Patrick McHardy | dee5817 | 2009-11-06 17:04:00 +0100 | [diff] [blame] | 745 | if (event == NETLINK_URELEASE && n->protocol == NETLINK_NETFILTER) { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 746 | int i; |
| 747 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 748 | /* destroy all instances for this portid */ |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 749 | spin_lock_bh(&log->instances_lock); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 750 | for (i = 0; i < INSTANCE_BUCKETS; i++) { |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 751 | struct hlist_node *t2; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 752 | struct nfulnl_instance *inst; |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 753 | struct hlist_head *head = &log->instance_table[i]; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 754 | |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 755 | hlist_for_each_entry_safe(inst, t2, head, hlist) { |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 756 | if (n->portid == inst->peer_portid) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 757 | __instance_destroy(inst); |
| 758 | } |
| 759 | } |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 760 | spin_unlock_bh(&log->instances_lock); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 761 | } |
| 762 | return NOTIFY_DONE; |
| 763 | } |
| 764 | |
| 765 | static struct notifier_block nfulnl_rtnl_notifier = { |
| 766 | .notifier_call = nfulnl_rcv_nl_event, |
| 767 | }; |
| 768 | |
| 769 | static int |
| 770 | nfulnl_recv_unsupp(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 771 | const struct nlmsghdr *nlh, |
| 772 | const struct nlattr * const nfqa[]) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 773 | { |
| 774 | return -ENOTSUPP; |
| 775 | } |
| 776 | |
Eric Leblond | ca735b3 | 2009-03-16 14:54:21 +0100 | [diff] [blame] | 777 | static struct nf_logger nfulnl_logger __read_mostly = { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 778 | .name = "nfnetlink_log", |
| 779 | .logfn = &nfulnl_log_packet, |
| 780 | .me = THIS_MODULE, |
| 781 | }; |
| 782 | |
Patrick McHardy | fd8281a | 2007-09-28 14:39:09 -0700 | [diff] [blame] | 783 | static const struct nla_policy nfula_cfg_policy[NFULA_CFG_MAX+1] = { |
| 784 | [NFULA_CFG_CMD] = { .len = sizeof(struct nfulnl_msg_config_cmd) }, |
| 785 | [NFULA_CFG_MODE] = { .len = sizeof(struct nfulnl_msg_config_mode) }, |
| 786 | [NFULA_CFG_TIMEOUT] = { .type = NLA_U32 }, |
| 787 | [NFULA_CFG_QTHRESH] = { .type = NLA_U32 }, |
| 788 | [NFULA_CFG_NLBUFSIZ] = { .type = NLA_U32 }, |
| 789 | [NFULA_CFG_FLAGS] = { .type = NLA_U16 }, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 790 | }; |
| 791 | |
| 792 | static int |
| 793 | nfulnl_recv_config(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 794 | const struct nlmsghdr *nlh, |
| 795 | const struct nlattr * const nfula[]) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 796 | { |
David S. Miller | d550d09 | 2012-06-26 21:34:03 -0700 | [diff] [blame] | 797 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 798 | u_int16_t group_num = ntohs(nfmsg->res_id); |
| 799 | struct nfulnl_instance *inst; |
Patrick McHardy | b7047a1 | 2008-03-10 16:44:13 -0700 | [diff] [blame] | 800 | struct nfulnl_msg_config_cmd *cmd = NULL; |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame] | 801 | struct net *net = sock_net(ctnl); |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 802 | struct nfnl_log_net *log = nfnl_log_pernet(net); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 803 | int ret = 0; |
| 804 | |
Patrick McHardy | b7047a1 | 2008-03-10 16:44:13 -0700 | [diff] [blame] | 805 | if (nfula[NFULA_CFG_CMD]) { |
| 806 | u_int8_t pf = nfmsg->nfgen_family; |
| 807 | cmd = nla_data(nfula[NFULA_CFG_CMD]); |
| 808 | |
| 809 | /* Commands without queue context */ |
| 810 | switch (cmd->command) { |
| 811 | case NFULNL_CFG_CMD_PF_BIND: |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame] | 812 | return nf_log_bind_pf(net, pf, &nfulnl_logger); |
Patrick McHardy | b7047a1 | 2008-03-10 16:44:13 -0700 | [diff] [blame] | 813 | case NFULNL_CFG_CMD_PF_UNBIND: |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame] | 814 | nf_log_unbind_pf(net, pf); |
Patrick McHardy | b7047a1 | 2008-03-10 16:44:13 -0700 | [diff] [blame] | 815 | return 0; |
| 816 | } |
| 817 | } |
| 818 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 819 | inst = instance_lookup_get(log, group_num); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 820 | if (inst && inst->peer_portid != NETLINK_CB(skb).portid) { |
Patrick McHardy | c0506365 | 2007-12-17 22:39:55 -0800 | [diff] [blame] | 821 | ret = -EPERM; |
| 822 | goto out_put; |
| 823 | } |
| 824 | |
Patrick McHardy | b7047a1 | 2008-03-10 16:44:13 -0700 | [diff] [blame] | 825 | if (cmd != NULL) { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 826 | switch (cmd->command) { |
| 827 | case NFULNL_CFG_CMD_BIND: |
| 828 | if (inst) { |
| 829 | ret = -EBUSY; |
| 830 | goto out_put; |
| 831 | } |
| 832 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 833 | inst = instance_create(net, group_num, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 834 | NETLINK_CB(skb).portid, |
Patrick McHardy | e32123e | 2013-04-17 06:46:57 +0000 | [diff] [blame] | 835 | sk_user_ns(NETLINK_CB(skb).sk)); |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 836 | if (IS_ERR(inst)) { |
| 837 | ret = PTR_ERR(inst); |
Michal Miroslaw | f414c16 | 2007-03-23 11:11:31 -0700 | [diff] [blame] | 838 | goto out; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 839 | } |
| 840 | break; |
| 841 | case NFULNL_CFG_CMD_UNBIND: |
| 842 | if (!inst) { |
| 843 | ret = -ENODEV; |
Michal Miroslaw | f414c16 | 2007-03-23 11:11:31 -0700 | [diff] [blame] | 844 | goto out; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 845 | } |
| 846 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 847 | instance_destroy(log, inst); |
Alexey Dobriyan | a49c650 | 2010-02-26 17:48:40 +0100 | [diff] [blame] | 848 | goto out_put; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 849 | default: |
Patrick McHardy | cd21f0a | 2007-12-17 22:40:19 -0800 | [diff] [blame] | 850 | ret = -ENOTSUPP; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 851 | break; |
| 852 | } |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 853 | } |
| 854 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 855 | if (nfula[NFULA_CFG_MODE]) { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 856 | struct nfulnl_msg_config_mode *params; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 857 | params = nla_data(nfula[NFULA_CFG_MODE]); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 858 | |
Patrick McHardy | c0506365 | 2007-12-17 22:39:55 -0800 | [diff] [blame] | 859 | if (!inst) { |
| 860 | ret = -ENODEV; |
| 861 | goto out; |
| 862 | } |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 863 | nfulnl_set_mode(inst, params->copy_mode, |
Al Viro | d1208b9 | 2006-11-03 00:58:41 -0800 | [diff] [blame] | 864 | ntohl(params->copy_range)); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 865 | } |
| 866 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 867 | if (nfula[NFULA_CFG_TIMEOUT]) { |
Patrick McHardy | 0dfedd2 | 2007-12-17 22:41:35 -0800 | [diff] [blame] | 868 | __be32 timeout = nla_get_be32(nfula[NFULA_CFG_TIMEOUT]); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 869 | |
Patrick McHardy | c0506365 | 2007-12-17 22:39:55 -0800 | [diff] [blame] | 870 | if (!inst) { |
| 871 | ret = -ENODEV; |
| 872 | goto out; |
| 873 | } |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 874 | nfulnl_set_timeout(inst, ntohl(timeout)); |
| 875 | } |
| 876 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 877 | if (nfula[NFULA_CFG_NLBUFSIZ]) { |
Patrick McHardy | 0dfedd2 | 2007-12-17 22:41:35 -0800 | [diff] [blame] | 878 | __be32 nlbufsiz = nla_get_be32(nfula[NFULA_CFG_NLBUFSIZ]); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 879 | |
Patrick McHardy | c0506365 | 2007-12-17 22:39:55 -0800 | [diff] [blame] | 880 | if (!inst) { |
| 881 | ret = -ENODEV; |
| 882 | goto out; |
| 883 | } |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 884 | nfulnl_set_nlbufsiz(inst, ntohl(nlbufsiz)); |
| 885 | } |
| 886 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 887 | if (nfula[NFULA_CFG_QTHRESH]) { |
Patrick McHardy | 0dfedd2 | 2007-12-17 22:41:35 -0800 | [diff] [blame] | 888 | __be32 qthresh = nla_get_be32(nfula[NFULA_CFG_QTHRESH]); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 889 | |
Patrick McHardy | c0506365 | 2007-12-17 22:39:55 -0800 | [diff] [blame] | 890 | if (!inst) { |
| 891 | ret = -ENODEV; |
| 892 | goto out; |
| 893 | } |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 894 | nfulnl_set_qthresh(inst, ntohl(qthresh)); |
| 895 | } |
| 896 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 897 | if (nfula[NFULA_CFG_FLAGS]) { |
Patrick McHardy | 0dfedd2 | 2007-12-17 22:41:35 -0800 | [diff] [blame] | 898 | __be16 flags = nla_get_be16(nfula[NFULA_CFG_FLAGS]); |
Patrick McHardy | c0506365 | 2007-12-17 22:39:55 -0800 | [diff] [blame] | 899 | |
| 900 | if (!inst) { |
| 901 | ret = -ENODEV; |
| 902 | goto out; |
| 903 | } |
Patrick McHardy | ee43353 | 2006-05-19 02:17:18 -0700 | [diff] [blame] | 904 | nfulnl_set_flags(inst, ntohs(flags)); |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 905 | } |
| 906 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 907 | out_put: |
| 908 | instance_put(inst); |
Michal Miroslaw | dd16704 | 2007-03-04 15:59:20 -0800 | [diff] [blame] | 909 | out: |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 910 | return ret; |
| 911 | } |
| 912 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 913 | static const struct nfnl_callback nfulnl_cb[NFULNL_MSG_MAX] = { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 914 | [NFULNL_MSG_PACKET] = { .call = nfulnl_recv_unsupp, |
Harald Welte | 37d2e7a | 2005-11-14 15:24:59 -0800 | [diff] [blame] | 915 | .attr_count = NFULA_MAX, }, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 916 | [NFULNL_MSG_CONFIG] = { .call = nfulnl_recv_config, |
Patrick McHardy | fd8281a | 2007-09-28 14:39:09 -0700 | [diff] [blame] | 917 | .attr_count = NFULA_CFG_MAX, |
| 918 | .policy = nfula_cfg_policy }, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 919 | }; |
| 920 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 921 | static const struct nfnetlink_subsystem nfulnl_subsys = { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 922 | .name = "log", |
| 923 | .subsys_id = NFNL_SUBSYS_ULOG, |
| 924 | .cb_count = NFULNL_MSG_MAX, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 925 | .cb = nfulnl_cb, |
| 926 | }; |
| 927 | |
| 928 | #ifdef CONFIG_PROC_FS |
| 929 | struct iter_state { |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 930 | struct seq_net_private p; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 931 | unsigned int bucket; |
| 932 | }; |
| 933 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 934 | static struct hlist_node *get_first(struct net *net, struct iter_state *st) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 935 | { |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 936 | struct nfnl_log_net *log; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 937 | if (!st) |
| 938 | return NULL; |
| 939 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 940 | log = nfnl_log_pernet(net); |
| 941 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 942 | for (st->bucket = 0; st->bucket < INSTANCE_BUCKETS; st->bucket++) { |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 943 | struct hlist_head *head = &log->instance_table[st->bucket]; |
| 944 | |
| 945 | if (!hlist_empty(head)) |
| 946 | return rcu_dereference_bh(hlist_first_rcu(head)); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 947 | } |
| 948 | return NULL; |
| 949 | } |
| 950 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 951 | static struct hlist_node *get_next(struct net *net, struct iter_state *st, |
| 952 | struct hlist_node *h) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 953 | { |
Eric Dumazet | 0e60ebe | 2010-11-15 18:17:21 +0100 | [diff] [blame] | 954 | h = rcu_dereference_bh(hlist_next_rcu(h)); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 955 | while (!h) { |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 956 | struct nfnl_log_net *log; |
| 957 | struct hlist_head *head; |
| 958 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 959 | if (++st->bucket >= INSTANCE_BUCKETS) |
| 960 | return NULL; |
| 961 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 962 | log = nfnl_log_pernet(net); |
| 963 | head = &log->instance_table[st->bucket]; |
| 964 | h = rcu_dereference_bh(hlist_first_rcu(head)); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 965 | } |
| 966 | return h; |
| 967 | } |
| 968 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 969 | static struct hlist_node *get_idx(struct net *net, struct iter_state *st, |
| 970 | loff_t pos) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 971 | { |
| 972 | struct hlist_node *head; |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 973 | head = get_first(net, st); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 974 | |
| 975 | if (head) |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 976 | while (pos && (head = get_next(net, st, head))) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 977 | pos--; |
| 978 | return pos ? NULL : head; |
| 979 | } |
| 980 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 981 | static void *seq_start(struct seq_file *s, loff_t *pos) |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 982 | __acquires(rcu_bh) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 983 | { |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 984 | rcu_read_lock_bh(); |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 985 | return get_idx(seq_file_net(s), s->private, *pos); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 986 | } |
| 987 | |
| 988 | static void *seq_next(struct seq_file *s, void *v, loff_t *pos) |
| 989 | { |
| 990 | (*pos)++; |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 991 | return get_next(seq_file_net(s), s->private, v); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 992 | } |
| 993 | |
| 994 | static void seq_stop(struct seq_file *s, void *v) |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 995 | __releases(rcu_bh) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 996 | { |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 997 | rcu_read_unlock_bh(); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 998 | } |
| 999 | |
| 1000 | static int seq_show(struct seq_file *s, void *v) |
| 1001 | { |
| 1002 | const struct nfulnl_instance *inst = v; |
| 1003 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1004 | return seq_printf(s, "%5d %6d %5d %1d %5d %6d %2d\n", |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1005 | inst->group_num, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 1006 | inst->peer_portid, inst->qlen, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1007 | inst->copy_mode, inst->copy_range, |
| 1008 | inst->flushtimeout, atomic_read(&inst->use)); |
| 1009 | } |
| 1010 | |
Philippe De Muyter | 56b3d97 | 2007-07-10 23:07:31 -0700 | [diff] [blame] | 1011 | static const struct seq_operations nful_seq_ops = { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1012 | .start = seq_start, |
| 1013 | .next = seq_next, |
| 1014 | .stop = seq_stop, |
| 1015 | .show = seq_show, |
| 1016 | }; |
| 1017 | |
| 1018 | static int nful_open(struct inode *inode, struct file *file) |
| 1019 | { |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 1020 | return seq_open_net(inode, file, &nful_seq_ops, |
| 1021 | sizeof(struct iter_state)); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1022 | } |
| 1023 | |
Arjan van de Ven | da7071d | 2007-02-12 00:55:36 -0800 | [diff] [blame] | 1024 | static const struct file_operations nful_file_ops = { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1025 | .owner = THIS_MODULE, |
| 1026 | .open = nful_open, |
| 1027 | .read = seq_read, |
| 1028 | .llseek = seq_lseek, |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 1029 | .release = seq_release_net, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1030 | }; |
| 1031 | |
| 1032 | #endif /* PROC_FS */ |
| 1033 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 1034 | static int __net_init nfnl_log_net_init(struct net *net) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1035 | { |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 1036 | unsigned int i; |
| 1037 | struct nfnl_log_net *log = nfnl_log_pernet(net); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1038 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1039 | for (i = 0; i < INSTANCE_BUCKETS; i++) |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 1040 | INIT_HLIST_HEAD(&log->instance_table[i]); |
| 1041 | spin_lock_init(&log->instances_lock); |
| 1042 | |
| 1043 | #ifdef CONFIG_PROC_FS |
| 1044 | if (!proc_create("nfnetlink_log", 0440, |
| 1045 | net->nf.proc_netfilter, &nful_file_ops)) |
| 1046 | return -ENOMEM; |
| 1047 | #endif |
| 1048 | return 0; |
| 1049 | } |
| 1050 | |
| 1051 | static void __net_exit nfnl_log_net_exit(struct net *net) |
| 1052 | { |
Pablo Neira Ayuso | e778f56 | 2013-04-30 08:01:18 +0000 | [diff] [blame] | 1053 | #ifdef CONFIG_PROC_FS |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 1054 | remove_proc_entry("nfnetlink_log", net->nf.proc_netfilter); |
Pablo Neira Ayuso | e778f56 | 2013-04-30 08:01:18 +0000 | [diff] [blame] | 1055 | #endif |
Gao feng | 45c2aff | 2013-12-16 14:59:22 +0800 | [diff] [blame] | 1056 | nf_log_unset(net, &nfulnl_logger); |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 1057 | } |
| 1058 | |
| 1059 | static struct pernet_operations nfnl_log_net_ops = { |
| 1060 | .init = nfnl_log_net_init, |
| 1061 | .exit = nfnl_log_net_exit, |
| 1062 | .id = &nfnl_log_net_id, |
| 1063 | .size = sizeof(struct nfnl_log_net), |
| 1064 | }; |
| 1065 | |
| 1066 | static int __init nfnetlink_log_init(void) |
| 1067 | { |
| 1068 | int status = -ENOMEM; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1069 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1070 | /* it's not really all that important to have a random value, so |
| 1071 | * we can do this from the init function, even if there hasn't |
| 1072 | * been that much entropy yet */ |
| 1073 | get_random_bytes(&hash_init, sizeof(hash_init)); |
| 1074 | |
| 1075 | netlink_register_notifier(&nfulnl_rtnl_notifier); |
| 1076 | status = nfnetlink_subsys_register(&nfulnl_subsys); |
| 1077 | if (status < 0) { |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 1078 | pr_err("log: failed to create netlink socket\n"); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1079 | goto cleanup_netlink_notifier; |
| 1080 | } |
| 1081 | |
Eric Leblond | ca735b3 | 2009-03-16 14:54:21 +0100 | [diff] [blame] | 1082 | status = nf_log_register(NFPROTO_UNSPEC, &nfulnl_logger); |
| 1083 | if (status < 0) { |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 1084 | pr_err("log: failed to register logger\n"); |
Eric Leblond | ca735b3 | 2009-03-16 14:54:21 +0100 | [diff] [blame] | 1085 | goto cleanup_subsys; |
| 1086 | } |
| 1087 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 1088 | status = register_pernet_subsys(&nfnl_log_net_ops); |
| 1089 | if (status < 0) { |
| 1090 | pr_err("log: failed to register pernet ops\n"); |
Eric Leblond | ca735b3 | 2009-03-16 14:54:21 +0100 | [diff] [blame] | 1091 | goto cleanup_logger; |
Julia Lawall | 6fc09f1 | 2012-08-29 06:49:17 +0000 | [diff] [blame] | 1092 | } |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1093 | return status; |
| 1094 | |
Eric Leblond | ca735b3 | 2009-03-16 14:54:21 +0100 | [diff] [blame] | 1095 | cleanup_logger: |
| 1096 | nf_log_unregister(&nfulnl_logger); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1097 | cleanup_subsys: |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1098 | nfnetlink_subsys_unregister(&nfulnl_subsys); |
| 1099 | cleanup_netlink_notifier: |
| 1100 | netlink_unregister_notifier(&nfulnl_rtnl_notifier); |
| 1101 | return status; |
| 1102 | } |
| 1103 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 1104 | static void __exit nfnetlink_log_fini(void) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1105 | { |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 1106 | unregister_pernet_subsys(&nfnl_log_net_ops); |
Patrick McHardy | e92ad99 | 2007-02-12 11:11:55 -0800 | [diff] [blame] | 1107 | nf_log_unregister(&nfulnl_logger); |
Patrick McHardy | 32292a7 | 2006-04-06 14:11:30 -0700 | [diff] [blame] | 1108 | nfnetlink_subsys_unregister(&nfulnl_subsys); |
| 1109 | netlink_unregister_notifier(&nfulnl_rtnl_notifier); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1110 | } |
| 1111 | |
| 1112 | MODULE_DESCRIPTION("netfilter userspace logging"); |
| 1113 | MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>"); |
| 1114 | MODULE_LICENSE("GPL"); |
Harald Welte | f682fae | 2005-08-09 20:20:34 -0700 | [diff] [blame] | 1115 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_ULOG); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1116 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 1117 | module_init(nfnetlink_log_init); |
| 1118 | module_exit(nfnetlink_log_fini); |