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> |
| 6 | * |
| 7 | * Based on the old ipv4-only ipt_ULOG.c: |
| 8 | * (C) 2000-2004 by Harald Welte <laforge@netfilter.org> |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify |
| 11 | * it under the terms of the GNU General Public License version 2 as |
| 12 | * published by the Free Software Foundation. |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 13 | */ |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/skbuff.h> |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/ip.h> |
| 18 | #include <linux/ipv6.h> |
| 19 | #include <linux/netdevice.h> |
| 20 | #include <linux/netfilter.h> |
| 21 | #include <linux/netlink.h> |
| 22 | #include <linux/netfilter/nfnetlink.h> |
| 23 | #include <linux/netfilter/nfnetlink_log.h> |
| 24 | #include <linux/spinlock.h> |
| 25 | #include <linux/sysctl.h> |
| 26 | #include <linux/proc_fs.h> |
| 27 | #include <linux/security.h> |
| 28 | #include <linux/list.h> |
| 29 | #include <linux/jhash.h> |
| 30 | #include <linux/random.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 31 | #include <linux/slab.h> |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 32 | #include <net/sock.h> |
Patrick McHardy | f01ffbd | 2007-12-17 22:38:49 -0800 | [diff] [blame] | 33 | #include <net/netfilter/nf_log.h> |
Patrick McHardy | d9e1500 | 2008-11-18 12:16:52 +0100 | [diff] [blame] | 34 | #include <net/netfilter/nfnetlink_log.h> |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 35 | |
Arun Sharma | 60063497 | 2011-07-26 16:09:06 -0700 | [diff] [blame] | 36 | #include <linux/atomic.h> |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 37 | |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 38 | #ifdef CONFIG_BRIDGE_NETFILTER |
| 39 | #include "../bridge/br_private.h" |
| 40 | #endif |
| 41 | |
Holger Eitzenberger | c2db292 | 2006-02-04 02:13:14 -0800 | [diff] [blame] | 42 | #define NFULNL_NLBUFSIZ_DEFAULT NLMSG_GOODSIZE |
Eric Leblond | 2c6764b | 2009-02-18 15:29:49 +0100 | [diff] [blame] | 43 | #define NFULNL_TIMEOUT_DEFAULT 100 /* every second */ |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 44 | #define NFULNL_QTHRESH_DEFAULT 100 /* 100 packets */ |
Michal Miroslaw | 6b6ec99 | 2007-09-28 14:45:52 -0700 | [diff] [blame] | 45 | #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] | 46 | |
| 47 | #define PRINTR(x, args...) do { if (net_ratelimit()) \ |
| 48 | printk(x, ## args); } while (0); |
| 49 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 50 | struct nfulnl_instance { |
| 51 | struct hlist_node hlist; /* global list of instances */ |
| 52 | spinlock_t lock; |
| 53 | atomic_t use; /* use count */ |
| 54 | |
| 55 | unsigned int qlen; /* number of nlmsgs in skb */ |
| 56 | struct sk_buff *skb; /* pre-allocatd skb */ |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 57 | struct timer_list timer; |
Eric W. Biederman | 9eea951 | 2012-05-25 10:42:54 -0600 | [diff] [blame] | 58 | 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] | 59 | int peer_portid; /* PORTID of the peer process */ |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 60 | |
| 61 | /* configurable parameters */ |
| 62 | unsigned int flushtimeout; /* timeout until queue flush */ |
| 63 | unsigned int nlbufsiz; /* netlink buffer allocation size */ |
| 64 | unsigned int qthreshold; /* threshold of the queue */ |
| 65 | u_int32_t copy_range; |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 66 | u_int32_t seq; /* instance-local sequential counter */ |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 67 | u_int16_t group_num; /* number of this queue */ |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 68 | u_int16_t flags; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 69 | u_int8_t copy_mode; |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 70 | struct rcu_head rcu; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 71 | }; |
| 72 | |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 73 | static DEFINE_SPINLOCK(instances_lock); |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 74 | static atomic_t global_seq; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 75 | |
| 76 | #define INSTANCE_BUCKETS 16 |
| 77 | static struct hlist_head instance_table[INSTANCE_BUCKETS]; |
| 78 | static unsigned int hash_init; |
| 79 | |
| 80 | static inline u_int8_t instance_hashfn(u_int16_t group_num) |
| 81 | { |
| 82 | return ((group_num & 0xff) % INSTANCE_BUCKETS); |
| 83 | } |
| 84 | |
| 85 | static struct nfulnl_instance * |
| 86 | __instance_lookup(u_int16_t group_num) |
| 87 | { |
| 88 | struct hlist_head *head; |
| 89 | struct hlist_node *pos; |
| 90 | struct nfulnl_instance *inst; |
| 91 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 92 | head = &instance_table[instance_hashfn(group_num)]; |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 93 | hlist_for_each_entry_rcu(inst, pos, head, hlist) { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 94 | if (inst->group_num == group_num) |
| 95 | return inst; |
| 96 | } |
| 97 | return NULL; |
| 98 | } |
| 99 | |
| 100 | static inline void |
| 101 | instance_get(struct nfulnl_instance *inst) |
| 102 | { |
| 103 | atomic_inc(&inst->use); |
| 104 | } |
| 105 | |
| 106 | static struct nfulnl_instance * |
| 107 | instance_lookup_get(u_int16_t group_num) |
| 108 | { |
| 109 | struct nfulnl_instance *inst; |
| 110 | |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 111 | rcu_read_lock_bh(); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 112 | inst = __instance_lookup(group_num); |
Eric Dumazet | f5c5440 | 2010-06-14 16:15:23 +0200 | [diff] [blame] | 113 | if (inst && !atomic_inc_not_zero(&inst->use)) |
| 114 | inst = NULL; |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 115 | rcu_read_unlock_bh(); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 116 | |
| 117 | return inst; |
| 118 | } |
| 119 | |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 120 | static void nfulnl_instance_free_rcu(struct rcu_head *head) |
| 121 | { |
| 122 | kfree(container_of(head, struct nfulnl_instance, rcu)); |
| 123 | module_put(THIS_MODULE); |
| 124 | } |
| 125 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 126 | static void |
| 127 | instance_put(struct nfulnl_instance *inst) |
| 128 | { |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 129 | if (inst && atomic_dec_and_test(&inst->use)) |
| 130 | call_rcu_bh(&inst->rcu, nfulnl_instance_free_rcu); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 131 | } |
| 132 | |
| 133 | static void nfulnl_timer(unsigned long data); |
| 134 | |
| 135 | static struct nfulnl_instance * |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 136 | instance_create(u_int16_t group_num, int portid, struct user_namespace *user_ns) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 137 | { |
| 138 | struct nfulnl_instance *inst; |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 139 | int err; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 140 | |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 141 | spin_lock_bh(&instances_lock); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 142 | if (__instance_lookup(group_num)) { |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 143 | err = -EEXIST; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 144 | goto out_unlock; |
| 145 | } |
| 146 | |
Harald Welte | 10dfdc6 | 2005-11-03 19:20:07 +0100 | [diff] [blame] | 147 | inst = kzalloc(sizeof(*inst), GFP_ATOMIC); |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 148 | if (!inst) { |
| 149 | err = -ENOMEM; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 150 | goto out_unlock; |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 151 | } |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 152 | |
Michal Miroslaw | aace57e | 2007-09-28 14:45:27 -0700 | [diff] [blame] | 153 | if (!try_module_get(THIS_MODULE)) { |
| 154 | kfree(inst); |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 155 | err = -EAGAIN; |
Michal Miroslaw | aace57e | 2007-09-28 14:45:27 -0700 | [diff] [blame] | 156 | goto out_unlock; |
| 157 | } |
| 158 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 159 | INIT_HLIST_NODE(&inst->hlist); |
YOSHIFUJI Hideaki | 181a46a | 2006-01-04 13:56:54 -0800 | [diff] [blame] | 160 | spin_lock_init(&inst->lock); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 161 | /* needs to be two, since we _put() after creation */ |
| 162 | atomic_set(&inst->use, 2); |
| 163 | |
Patrick McHardy | e6f689d | 2007-03-23 11:16:30 -0700 | [diff] [blame] | 164 | setup_timer(&inst->timer, nfulnl_timer, (unsigned long)inst); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 165 | |
Eric W. Biederman | 9eea951 | 2012-05-25 10:42:54 -0600 | [diff] [blame] | 166 | inst->peer_user_ns = user_ns; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 167 | inst->peer_portid = portid; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 168 | inst->group_num = group_num; |
| 169 | |
| 170 | inst->qthreshold = NFULNL_QTHRESH_DEFAULT; |
| 171 | inst->flushtimeout = NFULNL_TIMEOUT_DEFAULT; |
| 172 | inst->nlbufsiz = NFULNL_NLBUFSIZ_DEFAULT; |
| 173 | inst->copy_mode = NFULNL_COPY_PACKET; |
Michal Miroslaw | 6b6ec99 | 2007-09-28 14:45:52 -0700 | [diff] [blame] | 174 | inst->copy_range = NFULNL_COPY_RANGE_MAX; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 175 | |
Eric Dumazet | f5c5440 | 2010-06-14 16:15:23 +0200 | [diff] [blame] | 176 | hlist_add_head_rcu(&inst->hlist, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 177 | &instance_table[instance_hashfn(group_num)]); |
| 178 | |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 179 | spin_unlock_bh(&instances_lock); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 180 | |
| 181 | return inst; |
| 182 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 183 | out_unlock: |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 184 | spin_unlock_bh(&instances_lock); |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 185 | return ERR_PTR(err); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 186 | } |
| 187 | |
Michal Miroslaw | e356706 | 2007-09-28 14:44:21 -0700 | [diff] [blame] | 188 | static void __nfulnl_flush(struct nfulnl_instance *inst); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 189 | |
Eric Dumazet | f5c5440 | 2010-06-14 16:15:23 +0200 | [diff] [blame] | 190 | /* called with BH disabled */ |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 191 | static void |
Patrick McHardy | 9afdb00 | 2007-03-23 11:12:50 -0700 | [diff] [blame] | 192 | __instance_destroy(struct nfulnl_instance *inst) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 193 | { |
| 194 | /* first pull it out of the global list */ |
Eric Dumazet | f5c5440 | 2010-06-14 16:15:23 +0200 | [diff] [blame] | 195 | hlist_del_rcu(&inst->hlist); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 196 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 197 | /* then flush all pending packets from skb */ |
| 198 | |
Eric Dumazet | f5c5440 | 2010-06-14 16:15:23 +0200 | [diff] [blame] | 199 | spin_lock(&inst->lock); |
| 200 | |
| 201 | /* lockless readers wont be able to use us */ |
| 202 | inst->copy_mode = NFULNL_COPY_DISABLED; |
| 203 | |
Michal Miroslaw | e356706 | 2007-09-28 14:44:21 -0700 | [diff] [blame] | 204 | if (inst->skb) |
| 205 | __nfulnl_flush(inst); |
Eric Dumazet | f5c5440 | 2010-06-14 16:15:23 +0200 | [diff] [blame] | 206 | spin_unlock(&inst->lock); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 207 | |
| 208 | /* and finally put the refcount */ |
| 209 | instance_put(inst); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 210 | } |
| 211 | |
| 212 | static inline void |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 213 | instance_destroy(struct nfulnl_instance *inst) |
| 214 | { |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 215 | spin_lock_bh(&instances_lock); |
Patrick McHardy | 9afdb00 | 2007-03-23 11:12:50 -0700 | [diff] [blame] | 216 | __instance_destroy(inst); |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 217 | spin_unlock_bh(&instances_lock); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 218 | } |
| 219 | |
| 220 | static int |
| 221 | nfulnl_set_mode(struct nfulnl_instance *inst, u_int8_t mode, |
| 222 | unsigned int range) |
| 223 | { |
| 224 | int status = 0; |
| 225 | |
| 226 | spin_lock_bh(&inst->lock); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 227 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 228 | switch (mode) { |
| 229 | case NFULNL_COPY_NONE: |
| 230 | case NFULNL_COPY_META: |
| 231 | inst->copy_mode = mode; |
| 232 | inst->copy_range = 0; |
| 233 | break; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 234 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 235 | case NFULNL_COPY_PACKET: |
| 236 | inst->copy_mode = mode; |
Michal Miroslaw | 6b6ec99 | 2007-09-28 14:45:52 -0700 | [diff] [blame] | 237 | inst->copy_range = min_t(unsigned int, |
| 238 | range, NFULNL_COPY_RANGE_MAX); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 239 | break; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 240 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 241 | default: |
| 242 | status = -EINVAL; |
| 243 | break; |
| 244 | } |
| 245 | |
| 246 | spin_unlock_bh(&inst->lock); |
| 247 | |
| 248 | return status; |
| 249 | } |
| 250 | |
| 251 | static int |
| 252 | nfulnl_set_nlbufsiz(struct nfulnl_instance *inst, u_int32_t nlbufsiz) |
| 253 | { |
| 254 | int status; |
| 255 | |
| 256 | spin_lock_bh(&inst->lock); |
| 257 | if (nlbufsiz < NFULNL_NLBUFSIZ_DEFAULT) |
| 258 | status = -ERANGE; |
| 259 | else if (nlbufsiz > 131072) |
| 260 | status = -ERANGE; |
| 261 | else { |
| 262 | inst->nlbufsiz = nlbufsiz; |
| 263 | status = 0; |
| 264 | } |
| 265 | spin_unlock_bh(&inst->lock); |
| 266 | |
| 267 | return status; |
| 268 | } |
| 269 | |
| 270 | static int |
| 271 | nfulnl_set_timeout(struct nfulnl_instance *inst, u_int32_t timeout) |
| 272 | { |
| 273 | spin_lock_bh(&inst->lock); |
| 274 | inst->flushtimeout = timeout; |
| 275 | spin_unlock_bh(&inst->lock); |
| 276 | |
| 277 | return 0; |
| 278 | } |
| 279 | |
| 280 | static int |
| 281 | nfulnl_set_qthresh(struct nfulnl_instance *inst, u_int32_t qthresh) |
| 282 | { |
| 283 | spin_lock_bh(&inst->lock); |
| 284 | inst->qthreshold = qthresh; |
| 285 | spin_unlock_bh(&inst->lock); |
| 286 | |
| 287 | return 0; |
| 288 | } |
| 289 | |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 290 | static int |
| 291 | nfulnl_set_flags(struct nfulnl_instance *inst, u_int16_t flags) |
| 292 | { |
| 293 | spin_lock_bh(&inst->lock); |
Patrick McHardy | ee43353 | 2006-05-19 02:17:18 -0700 | [diff] [blame] | 294 | inst->flags = flags; |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 295 | spin_unlock_bh(&inst->lock); |
| 296 | |
| 297 | return 0; |
| 298 | } |
| 299 | |
Michal Miroslaw | c6a8f64 | 2007-09-28 14:45:06 -0700 | [diff] [blame] | 300 | static struct sk_buff * |
| 301 | nfulnl_alloc_skb(unsigned int inst_size, unsigned int pkt_size) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 302 | { |
| 303 | struct sk_buff *skb; |
Patrick McHardy | ad2ad0f | 2006-02-04 02:13:57 -0800 | [diff] [blame] | 304 | unsigned int n; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 305 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 306 | /* alloc skb which should be big enough for a whole multipart |
| 307 | * message. WARNING: has to be <= 128k due to slab restrictions */ |
| 308 | |
Patrick McHardy | ad2ad0f | 2006-02-04 02:13:57 -0800 | [diff] [blame] | 309 | n = max(inst_size, pkt_size); |
| 310 | skb = alloc_skb(n, GFP_ATOMIC); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 311 | if (!skb) { |
Patrick McHardy | ad2ad0f | 2006-02-04 02:13:57 -0800 | [diff] [blame] | 312 | if (n > pkt_size) { |
| 313 | /* try to allocate only as much as we need for current |
| 314 | * packet */ |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 315 | |
Patrick McHardy | ad2ad0f | 2006-02-04 02:13:57 -0800 | [diff] [blame] | 316 | skb = alloc_skb(pkt_size, GFP_ATOMIC); |
| 317 | if (!skb) |
Joe Perches | 0a9ee81 | 2011-08-29 14:17:25 -0700 | [diff] [blame] | 318 | pr_err("nfnetlink_log: can't even alloc %u bytes\n", |
| 319 | pkt_size); |
Patrick McHardy | ad2ad0f | 2006-02-04 02:13:57 -0800 | [diff] [blame] | 320 | } |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 321 | } |
| 322 | |
| 323 | return skb; |
| 324 | } |
| 325 | |
| 326 | static int |
| 327 | __nfulnl_send(struct nfulnl_instance *inst) |
| 328 | { |
Eric Leblond | 29c5d4a | 2007-09-18 13:07:15 -0700 | [diff] [blame] | 329 | int status = -1; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 330 | |
David S. Miller | d550d09 | 2012-06-26 21:34:03 -0700 | [diff] [blame] | 331 | if (inst->qlen > 1) { |
| 332 | struct nlmsghdr *nlh = nlmsg_put(inst->skb, 0, 0, |
| 333 | NLMSG_DONE, |
| 334 | sizeof(struct nfgenmsg), |
| 335 | 0); |
| 336 | if (!nlh) |
| 337 | goto out; |
| 338 | } |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 339 | status = nfnetlink_unicast(inst->skb, &init_net, inst->peer_portid, |
Alexey Dobriyan | cd8c20b | 2010-01-13 16:02:14 +0100 | [diff] [blame] | 340 | MSG_DONTWAIT); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 341 | |
| 342 | inst->qlen = 0; |
| 343 | inst->skb = NULL; |
David S. Miller | d550d09 | 2012-06-26 21:34:03 -0700 | [diff] [blame] | 344 | out: |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 345 | return status; |
| 346 | } |
| 347 | |
Michal Miroslaw | e356706 | 2007-09-28 14:44:21 -0700 | [diff] [blame] | 348 | static void |
| 349 | __nfulnl_flush(struct nfulnl_instance *inst) |
| 350 | { |
| 351 | /* timer holds a reference */ |
| 352 | if (del_timer(&inst->timer)) |
| 353 | instance_put(inst); |
| 354 | if (inst->skb) |
| 355 | __nfulnl_send(inst); |
| 356 | } |
| 357 | |
Michal Miroslaw | c6a8f64 | 2007-09-28 14:45:06 -0700 | [diff] [blame] | 358 | static void |
| 359 | nfulnl_timer(unsigned long data) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 360 | { |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 361 | struct nfulnl_instance *inst = (struct nfulnl_instance *)data; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 362 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 363 | spin_lock_bh(&inst->lock); |
Michal Miroslaw | 370e6a8 | 2007-03-23 11:12:21 -0700 | [diff] [blame] | 364 | if (inst->skb) |
| 365 | __nfulnl_send(inst); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 366 | spin_unlock_bh(&inst->lock); |
Michal Miroslaw | 05f7b7b | 2007-03-04 15:58:40 -0800 | [diff] [blame] | 367 | instance_put(inst); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 368 | } |
| 369 | |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 370 | /* This is an inline function, we don't really care about a long |
| 371 | * list of arguments */ |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 372 | static inline int |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 373 | __build_packet_message(struct nfulnl_instance *inst, |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 374 | const struct sk_buff *skb, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 375 | unsigned int data_len, |
Jan Engelhardt | 76108ce | 2008-10-08 11:35:00 +0200 | [diff] [blame] | 376 | u_int8_t pf, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 377 | unsigned int hooknum, |
| 378 | const struct net_device *indev, |
| 379 | const struct net_device *outdev, |
Patrick McHardy | d7a5c32 | 2006-11-29 02:35:34 +0100 | [diff] [blame] | 380 | const char *prefix, unsigned int plen) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 381 | { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 382 | struct nfulnl_msg_packet_hdr pmsg; |
| 383 | struct nlmsghdr *nlh; |
| 384 | struct nfgenmsg *nfmsg; |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 385 | sk_buff_data_t old_tail = inst->skb->tail; |
Eric Dumazet | 0626af3 | 2012-09-04 07:49:03 +0000 | [diff] [blame] | 386 | struct sock *sk; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 387 | |
David S. Miller | d550d09 | 2012-06-26 21:34:03 -0700 | [diff] [blame] | 388 | nlh = nlmsg_put(inst->skb, 0, 0, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 389 | NFNL_SUBSYS_ULOG << 8 | NFULNL_MSG_PACKET, |
David S. Miller | d550d09 | 2012-06-26 21:34:03 -0700 | [diff] [blame] | 390 | sizeof(struct nfgenmsg), 0); |
| 391 | if (!nlh) |
| 392 | return -1; |
| 393 | nfmsg = nlmsg_data(nlh); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 394 | nfmsg->nfgen_family = pf; |
| 395 | nfmsg->version = NFNETLINK_V0; |
| 396 | nfmsg->res_id = htons(inst->group_num); |
| 397 | |
Al Viro | febf0a4 | 2006-11-03 00:59:17 -0800 | [diff] [blame] | 398 | pmsg.hw_protocol = skb->protocol; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 399 | pmsg.hook = hooknum; |
| 400 | |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 401 | if (nla_put(inst->skb, NFULA_PACKET_HDR, sizeof(pmsg), &pmsg)) |
| 402 | goto nla_put_failure; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 403 | |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 404 | if (prefix && |
| 405 | nla_put(inst->skb, NFULA_PREFIX, plen, prefix)) |
| 406 | goto nla_put_failure; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 407 | |
| 408 | if (indev) { |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 409 | #ifndef CONFIG_BRIDGE_NETFILTER |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 410 | if (nla_put_be32(inst->skb, NFULA_IFINDEX_INDEV, |
| 411 | htonl(indev->ifindex))) |
| 412 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 413 | #else |
| 414 | if (pf == PF_BRIDGE) { |
| 415 | /* Case 1: outdev is physical input device, we need to |
| 416 | * look for bridge group (when called from |
| 417 | * netfilter_bridge) */ |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 418 | if (nla_put_be32(inst->skb, NFULA_IFINDEX_PHYSINDEV, |
| 419 | htonl(indev->ifindex)) || |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 420 | /* this is the bridge group "brX" */ |
Jiri Pirko | f350a0a8 | 2010-06-15 06:50:45 +0000 | [diff] [blame] | 421 | /* 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] | 422 | nla_put_be32(inst->skb, NFULA_IFINDEX_INDEV, |
| 423 | htonl(br_port_get_rcu(indev)->br->dev->ifindex))) |
| 424 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 425 | } else { |
| 426 | /* Case 2: indev is bridge group, we need to look for |
| 427 | * physical device (when called from ipv4) */ |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 428 | if (nla_put_be32(inst->skb, NFULA_IFINDEX_INDEV, |
| 429 | htonl(indev->ifindex))) |
| 430 | goto nla_put_failure; |
| 431 | if (skb->nf_bridge && skb->nf_bridge->physindev && |
| 432 | nla_put_be32(inst->skb, NFULA_IFINDEX_PHYSINDEV, |
| 433 | htonl(skb->nf_bridge->physindev->ifindex))) |
| 434 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 435 | } |
| 436 | #endif |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 437 | } |
| 438 | |
| 439 | if (outdev) { |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 440 | #ifndef CONFIG_BRIDGE_NETFILTER |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 441 | if (nla_put_be32(inst->skb, NFULA_IFINDEX_OUTDEV, |
| 442 | htonl(outdev->ifindex))) |
| 443 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 444 | #else |
| 445 | if (pf == PF_BRIDGE) { |
| 446 | /* Case 1: outdev is physical output device, we need to |
| 447 | * look for bridge group (when called from |
| 448 | * netfilter_bridge) */ |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 449 | if (nla_put_be32(inst->skb, NFULA_IFINDEX_PHYSOUTDEV, |
| 450 | htonl(outdev->ifindex)) || |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 451 | /* this is the bridge group "brX" */ |
Jiri Pirko | f350a0a8 | 2010-06-15 06:50:45 +0000 | [diff] [blame] | 452 | /* 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] | 453 | nla_put_be32(inst->skb, NFULA_IFINDEX_OUTDEV, |
| 454 | htonl(br_port_get_rcu(outdev)->br->dev->ifindex))) |
| 455 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 456 | } else { |
| 457 | /* Case 2: indev is a bridge group, we need to look |
| 458 | * for physical device (when called from ipv4) */ |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 459 | if (nla_put_be32(inst->skb, NFULA_IFINDEX_OUTDEV, |
| 460 | htonl(outdev->ifindex))) |
| 461 | goto nla_put_failure; |
| 462 | if (skb->nf_bridge && skb->nf_bridge->physoutdev && |
| 463 | nla_put_be32(inst->skb, NFULA_IFINDEX_PHYSOUTDEV, |
| 464 | htonl(skb->nf_bridge->physoutdev->ifindex))) |
| 465 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 466 | } |
| 467 | #endif |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 468 | } |
| 469 | |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 470 | if (skb->mark && |
| 471 | nla_put_be32(inst->skb, NFULA_MARK, htonl(skb->mark))) |
| 472 | goto nla_put_failure; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 473 | |
Nicolas Cavallari | 2c38de4 | 2011-06-16 17:27:04 +0200 | [diff] [blame] | 474 | if (indev && skb->dev && |
| 475 | skb->mac_header != skb->network_header) { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 476 | struct nfulnl_msg_packet_hw phw; |
Stephen Hemminger | b95cce3 | 2007-09-26 22:13:38 -0700 | [diff] [blame] | 477 | int len = dev_parse_header(skb, phw.hw_addr); |
| 478 | if (len > 0) { |
| 479 | phw.hw_addrlen = htons(len); |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 480 | if (nla_put(inst->skb, NFULA_HWADDR, sizeof(phw), &phw)) |
| 481 | goto nla_put_failure; |
Stephen Hemminger | b95cce3 | 2007-09-26 22:13:38 -0700 | [diff] [blame] | 482 | } |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 483 | } |
| 484 | |
Eric Leblond | 72961ec | 2008-07-21 10:02:35 -0700 | [diff] [blame] | 485 | if (indev && skb_mac_header_was_set(skb)) { |
Patrick McHardy | 2dba62c | 2012-08-19 10:16:08 +0000 | [diff] [blame] | 486 | 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] | 487 | nla_put_be16(inst->skb, NFULA_HWLEN, |
| 488 | htons(skb->dev->hard_header_len)) || |
| 489 | nla_put(inst->skb, NFULA_HWHEADER, skb->dev->hard_header_len, |
| 490 | skb_mac_header(skb))) |
| 491 | goto nla_put_failure; |
Eric Leblond | 72961ec | 2008-07-21 10:02:35 -0700 | [diff] [blame] | 492 | } |
| 493 | |
Eric Dumazet | b7aa0bf | 2007-04-19 16:16:32 -0700 | [diff] [blame] | 494 | if (skb->tstamp.tv64) { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 495 | struct nfulnl_msg_packet_timestamp ts; |
Eric Dumazet | b7aa0bf | 2007-04-19 16:16:32 -0700 | [diff] [blame] | 496 | struct timeval tv = ktime_to_timeval(skb->tstamp); |
| 497 | ts.sec = cpu_to_be64(tv.tv_sec); |
| 498 | ts.usec = cpu_to_be64(tv.tv_usec); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 499 | |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 500 | if (nla_put(inst->skb, NFULA_TIMESTAMP, sizeof(ts), &ts)) |
| 501 | goto nla_put_failure; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 502 | } |
| 503 | |
| 504 | /* UID */ |
Eric Dumazet | 0626af3 | 2012-09-04 07:49:03 +0000 | [diff] [blame] | 505 | sk = skb->sk; |
| 506 | if (sk && sk->sk_state != TCP_TIME_WAIT) { |
| 507 | read_lock_bh(&sk->sk_callback_lock); |
| 508 | if (sk->sk_socket && sk->sk_socket->file) { |
| 509 | struct file *file = sk->sk_socket->file; |
Linus Torvalds | 437589a | 2012-10-02 11:11:09 -0700 | [diff] [blame] | 510 | const struct cred *cred = file->f_cred; |
| 511 | struct user_namespace *user_ns = inst->peer_user_ns; |
| 512 | __be32 uid = htonl(from_kuid_munged(user_ns, cred->fsuid)); |
| 513 | __be32 gid = htonl(from_kgid_munged(user_ns, cred->fsgid)); |
Eric Dumazet | 0626af3 | 2012-09-04 07:49:03 +0000 | [diff] [blame] | 514 | read_unlock_bh(&sk->sk_callback_lock); |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 515 | if (nla_put_be32(inst->skb, NFULA_UID, uid) || |
| 516 | nla_put_be32(inst->skb, NFULA_GID, gid)) |
| 517 | goto nla_put_failure; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 518 | } else |
Eric Dumazet | 0626af3 | 2012-09-04 07:49:03 +0000 | [diff] [blame] | 519 | read_unlock_bh(&sk->sk_callback_lock); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 520 | } |
| 521 | |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 522 | /* local sequence number */ |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 523 | if ((inst->flags & NFULNL_CFG_F_SEQ) && |
| 524 | nla_put_be32(inst->skb, NFULA_SEQ, htonl(inst->seq++))) |
| 525 | goto nla_put_failure; |
Patrick McHardy | 0dfedd2 | 2007-12-17 22:41:35 -0800 | [diff] [blame] | 526 | |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 527 | /* global sequence number */ |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 528 | if ((inst->flags & NFULNL_CFG_F_SEQ_GLOBAL) && |
| 529 | nla_put_be32(inst->skb, NFULA_SEQ_GLOBAL, |
| 530 | htonl(atomic_inc_return(&global_seq)))) |
| 531 | goto nla_put_failure; |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 532 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 533 | if (data_len) { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 534 | struct nlattr *nla; |
| 535 | int size = nla_attr_size(data_len); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 536 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 537 | if (skb_tailroom(inst->skb) < nla_total_size(data_len)) { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 538 | printk(KERN_WARNING "nfnetlink_log: no tailroom!\n"); |
David S. Miller | d550d09 | 2012-06-26 21:34:03 -0700 | [diff] [blame] | 539 | return -1; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 540 | } |
| 541 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 542 | nla = (struct nlattr *)skb_put(inst->skb, nla_total_size(data_len)); |
| 543 | nla->nla_type = NFULA_PAYLOAD; |
| 544 | nla->nla_len = size; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 545 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 546 | if (skb_copy_bits(skb, 0, nla_data(nla), data_len)) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 547 | BUG(); |
| 548 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 549 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 550 | nlh->nlmsg_len = inst->skb->tail - old_tail; |
| 551 | return 0; |
| 552 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 553 | nla_put_failure: |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 554 | PRINTR(KERN_ERR "nfnetlink_log: error creating log nlmsg\n"); |
| 555 | return -1; |
| 556 | } |
| 557 | |
| 558 | #define RCV_SKB_FAIL(err) do { netlink_ack(skb, nlh, (err)); return; } while (0) |
| 559 | |
| 560 | static struct nf_loginfo default_loginfo = { |
| 561 | .type = NF_LOG_TYPE_ULOG, |
| 562 | .u = { |
| 563 | .ulog = { |
| 564 | .copy_len = 0xffff, |
| 565 | .group = 0, |
| 566 | .qthreshold = 1, |
| 567 | }, |
| 568 | }, |
| 569 | }; |
| 570 | |
| 571 | /* log handler for internal netfilter logging api */ |
Eric Leblond | 5f7340e | 2008-11-04 14:21:08 +0100 | [diff] [blame] | 572 | void |
Jan Engelhardt | 76108ce | 2008-10-08 11:35:00 +0200 | [diff] [blame] | 573 | nfulnl_log_packet(u_int8_t pf, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 574 | unsigned int hooknum, |
| 575 | const struct sk_buff *skb, |
| 576 | const struct net_device *in, |
| 577 | const struct net_device *out, |
| 578 | const struct nf_loginfo *li_user, |
| 579 | const char *prefix) |
| 580 | { |
| 581 | unsigned int size, data_len; |
| 582 | struct nfulnl_instance *inst; |
| 583 | const struct nf_loginfo *li; |
| 584 | unsigned int qthreshold; |
Patrick McHardy | d7a5c32 | 2006-11-29 02:35:34 +0100 | [diff] [blame] | 585 | unsigned int plen; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 586 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 587 | if (li_user && li_user->type == NF_LOG_TYPE_ULOG) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 588 | li = li_user; |
| 589 | else |
| 590 | li = &default_loginfo; |
| 591 | |
| 592 | inst = instance_lookup_get(li->u.ulog.group); |
| 593 | if (!inst) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 594 | return; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 595 | |
Patrick McHardy | d7a5c32 | 2006-11-29 02:35:34 +0100 | [diff] [blame] | 596 | plen = 0; |
| 597 | if (prefix) |
Patrick McHardy | 881dbfe | 2007-03-06 20:24:35 -0800 | [diff] [blame] | 598 | plen = strlen(prefix) + 1; |
Patrick McHardy | d7a5c32 | 2006-11-29 02:35:34 +0100 | [diff] [blame] | 599 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 600 | /* FIXME: do we want to make the size calculation conditional based on |
| 601 | * what is actually present? way more branches and checks, but more |
| 602 | * memory efficient... */ |
Eric Leblond | 7000d38 | 2008-03-10 16:42:04 -0700 | [diff] [blame] | 603 | size = NLMSG_SPACE(sizeof(struct nfgenmsg)) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 604 | + nla_total_size(sizeof(struct nfulnl_msg_packet_hdr)) |
| 605 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
| 606 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 607 | #ifdef CONFIG_BRIDGE_NETFILTER |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 608 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
| 609 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 610 | #endif |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 611 | + nla_total_size(sizeof(u_int32_t)) /* mark */ |
| 612 | + nla_total_size(sizeof(u_int32_t)) /* uid */ |
Patrick McHardy | 76aa1ce | 2007-12-17 22:41:52 -0800 | [diff] [blame] | 613 | + nla_total_size(sizeof(u_int32_t)) /* gid */ |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 614 | + nla_total_size(plen) /* prefix */ |
| 615 | + nla_total_size(sizeof(struct nfulnl_msg_packet_hw)) |
| 616 | + nla_total_size(sizeof(struct nfulnl_msg_packet_timestamp)); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 617 | |
Pablo Neira Ayuso | eeff9be | 2009-05-27 15:49:11 +0200 | [diff] [blame] | 618 | if (in && skb_mac_header_was_set(skb)) { |
| 619 | size += nla_total_size(skb->dev->hard_header_len) |
| 620 | + nla_total_size(sizeof(u_int16_t)) /* hwtype */ |
| 621 | + nla_total_size(sizeof(u_int16_t)); /* hwlen */ |
| 622 | } |
| 623 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 624 | spin_lock_bh(&inst->lock); |
| 625 | |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 626 | if (inst->flags & NFULNL_CFG_F_SEQ) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 627 | size += nla_total_size(sizeof(u_int32_t)); |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 628 | if (inst->flags & NFULNL_CFG_F_SEQ_GLOBAL) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 629 | size += nla_total_size(sizeof(u_int32_t)); |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 630 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 631 | qthreshold = inst->qthreshold; |
| 632 | /* per-rule qthreshold overrides per-instance */ |
Eric Leblond | 5ca431f | 2009-02-18 15:29:23 +0100 | [diff] [blame] | 633 | if (li->u.ulog.qthreshold) |
| 634 | if (qthreshold > li->u.ulog.qthreshold) |
| 635 | qthreshold = li->u.ulog.qthreshold; |
| 636 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 637 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 638 | switch (inst->copy_mode) { |
| 639 | case NFULNL_COPY_META: |
| 640 | case NFULNL_COPY_NONE: |
| 641 | data_len = 0; |
| 642 | break; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 643 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 644 | case NFULNL_COPY_PACKET: |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 645 | if (inst->copy_range == 0 |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 646 | || inst->copy_range > skb->len) |
| 647 | data_len = skb->len; |
| 648 | else |
| 649 | data_len = inst->copy_range; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 650 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 651 | size += nla_total_size(data_len); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 652 | break; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 653 | |
Eric Dumazet | f5c5440 | 2010-06-14 16:15:23 +0200 | [diff] [blame] | 654 | case NFULNL_COPY_DISABLED: |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 655 | default: |
Michal Miroslaw | 55b5a91 | 2007-03-23 11:11:05 -0700 | [diff] [blame] | 656 | goto unlock_and_release; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 657 | } |
| 658 | |
Michal Miroslaw | d63b043 | 2007-09-28 14:44:44 -0700 | [diff] [blame] | 659 | if (inst->skb && |
| 660 | size > skb_tailroom(inst->skb) - sizeof(struct nfgenmsg)) { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 661 | /* either the queue len is too high or we don't have |
| 662 | * enough room in the skb left. flush to userspace. */ |
Michal Miroslaw | e356706 | 2007-09-28 14:44:21 -0700 | [diff] [blame] | 663 | __nfulnl_flush(inst); |
Michal Miroslaw | 55b5a91 | 2007-03-23 11:11:05 -0700 | [diff] [blame] | 664 | } |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 665 | |
Michal Miroslaw | 55b5a91 | 2007-03-23 11:11:05 -0700 | [diff] [blame] | 666 | if (!inst->skb) { |
| 667 | inst->skb = nfulnl_alloc_skb(inst->nlbufsiz, size); |
| 668 | if (!inst->skb) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 669 | goto alloc_failure; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 670 | } |
| 671 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 672 | inst->qlen++; |
| 673 | |
| 674 | __build_packet_message(inst, skb, data_len, pf, |
Florian Westphal | 8248779b | 2011-02-15 21:59:37 +0100 | [diff] [blame] | 675 | hooknum, in, out, prefix, plen); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 676 | |
Michal Miroslaw | d63b043 | 2007-09-28 14:44:44 -0700 | [diff] [blame] | 677 | if (inst->qlen >= qthreshold) |
| 678 | __nfulnl_flush(inst); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 679 | /* timer_pending always called within inst->lock, so there |
| 680 | * is no chance of a race here */ |
Michal Miroslaw | d63b043 | 2007-09-28 14:44:44 -0700 | [diff] [blame] | 681 | else if (!timer_pending(&inst->timer)) { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 682 | instance_get(inst); |
| 683 | inst->timer.expires = jiffies + (inst->flushtimeout*HZ/100); |
| 684 | add_timer(&inst->timer); |
| 685 | } |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 686 | |
Michal Miroslaw | ed32abe | 2007-03-04 15:58:15 -0800 | [diff] [blame] | 687 | unlock_and_release: |
| 688 | spin_unlock_bh(&inst->lock); |
| 689 | instance_put(inst); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 690 | return; |
| 691 | |
| 692 | alloc_failure: |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 693 | /* FIXME: statistics */ |
Michal Miroslaw | ed32abe | 2007-03-04 15:58:15 -0800 | [diff] [blame] | 694 | goto unlock_and_release; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 695 | } |
Eric Leblond | 5f7340e | 2008-11-04 14:21:08 +0100 | [diff] [blame] | 696 | EXPORT_SYMBOL_GPL(nfulnl_log_packet); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 697 | |
| 698 | static int |
| 699 | nfulnl_rcv_nl_event(struct notifier_block *this, |
| 700 | unsigned long event, void *ptr) |
| 701 | { |
| 702 | struct netlink_notify *n = ptr; |
| 703 | |
Patrick McHardy | dee5817 | 2009-11-06 17:04:00 +0100 | [diff] [blame] | 704 | if (event == NETLINK_URELEASE && n->protocol == NETLINK_NETFILTER) { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 705 | int i; |
| 706 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 707 | /* destroy all instances for this portid */ |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 708 | spin_lock_bh(&instances_lock); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 709 | for (i = 0; i < INSTANCE_BUCKETS; i++) { |
| 710 | struct hlist_node *tmp, *t2; |
| 711 | struct nfulnl_instance *inst; |
| 712 | struct hlist_head *head = &instance_table[i]; |
| 713 | |
| 714 | hlist_for_each_entry_safe(inst, tmp, t2, head, hlist) { |
Octavian Purdila | 09ad9bc | 2009-11-25 15:14:13 -0800 | [diff] [blame] | 715 | if ((net_eq(n->net, &init_net)) && |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 716 | (n->portid == inst->peer_portid)) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 717 | __instance_destroy(inst); |
| 718 | } |
| 719 | } |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 720 | spin_unlock_bh(&instances_lock); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 721 | } |
| 722 | return NOTIFY_DONE; |
| 723 | } |
| 724 | |
| 725 | static struct notifier_block nfulnl_rtnl_notifier = { |
| 726 | .notifier_call = nfulnl_rcv_nl_event, |
| 727 | }; |
| 728 | |
| 729 | static int |
| 730 | nfulnl_recv_unsupp(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 731 | const struct nlmsghdr *nlh, |
| 732 | const struct nlattr * const nfqa[]) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 733 | { |
| 734 | return -ENOTSUPP; |
| 735 | } |
| 736 | |
Eric Leblond | ca735b3 | 2009-03-16 14:54:21 +0100 | [diff] [blame] | 737 | static struct nf_logger nfulnl_logger __read_mostly = { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 738 | .name = "nfnetlink_log", |
| 739 | .logfn = &nfulnl_log_packet, |
| 740 | .me = THIS_MODULE, |
| 741 | }; |
| 742 | |
Patrick McHardy | fd8281a | 2007-09-28 14:39:09 -0700 | [diff] [blame] | 743 | static const struct nla_policy nfula_cfg_policy[NFULA_CFG_MAX+1] = { |
| 744 | [NFULA_CFG_CMD] = { .len = sizeof(struct nfulnl_msg_config_cmd) }, |
| 745 | [NFULA_CFG_MODE] = { .len = sizeof(struct nfulnl_msg_config_mode) }, |
| 746 | [NFULA_CFG_TIMEOUT] = { .type = NLA_U32 }, |
| 747 | [NFULA_CFG_QTHRESH] = { .type = NLA_U32 }, |
| 748 | [NFULA_CFG_NLBUFSIZ] = { .type = NLA_U32 }, |
| 749 | [NFULA_CFG_FLAGS] = { .type = NLA_U16 }, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 750 | }; |
| 751 | |
| 752 | static int |
| 753 | nfulnl_recv_config(struct sock *ctnl, struct sk_buff *skb, |
Patrick McHardy | 3993832 | 2009-08-25 16:07:58 +0200 | [diff] [blame] | 754 | const struct nlmsghdr *nlh, |
| 755 | const struct nlattr * const nfula[]) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 756 | { |
David S. Miller | d550d09 | 2012-06-26 21:34:03 -0700 | [diff] [blame] | 757 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 758 | u_int16_t group_num = ntohs(nfmsg->res_id); |
| 759 | struct nfulnl_instance *inst; |
Patrick McHardy | b7047a1 | 2008-03-10 16:44:13 -0700 | [diff] [blame] | 760 | struct nfulnl_msg_config_cmd *cmd = NULL; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 761 | int ret = 0; |
| 762 | |
Patrick McHardy | b7047a1 | 2008-03-10 16:44:13 -0700 | [diff] [blame] | 763 | if (nfula[NFULA_CFG_CMD]) { |
| 764 | u_int8_t pf = nfmsg->nfgen_family; |
| 765 | cmd = nla_data(nfula[NFULA_CFG_CMD]); |
| 766 | |
| 767 | /* Commands without queue context */ |
| 768 | switch (cmd->command) { |
| 769 | case NFULNL_CFG_CMD_PF_BIND: |
Eric Leblond | ca735b3 | 2009-03-16 14:54:21 +0100 | [diff] [blame] | 770 | return nf_log_bind_pf(pf, &nfulnl_logger); |
Patrick McHardy | b7047a1 | 2008-03-10 16:44:13 -0700 | [diff] [blame] | 771 | case NFULNL_CFG_CMD_PF_UNBIND: |
Eric Leblond | ca735b3 | 2009-03-16 14:54:21 +0100 | [diff] [blame] | 772 | nf_log_unbind_pf(pf); |
Patrick McHardy | b7047a1 | 2008-03-10 16:44:13 -0700 | [diff] [blame] | 773 | return 0; |
| 774 | } |
| 775 | } |
| 776 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 777 | inst = instance_lookup_get(group_num); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 778 | if (inst && inst->peer_portid != NETLINK_CB(skb).portid) { |
Patrick McHardy | c0506365 | 2007-12-17 22:39:55 -0800 | [diff] [blame] | 779 | ret = -EPERM; |
| 780 | goto out_put; |
| 781 | } |
| 782 | |
Patrick McHardy | b7047a1 | 2008-03-10 16:44:13 -0700 | [diff] [blame] | 783 | if (cmd != NULL) { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 784 | switch (cmd->command) { |
| 785 | case NFULNL_CFG_CMD_BIND: |
| 786 | if (inst) { |
| 787 | ret = -EBUSY; |
| 788 | goto out_put; |
| 789 | } |
| 790 | |
| 791 | inst = instance_create(group_num, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 792 | NETLINK_CB(skb).portid, |
Eric W. Biederman | 9eea951 | 2012-05-25 10:42:54 -0600 | [diff] [blame] | 793 | sk_user_ns(NETLINK_CB(skb).ssk)); |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 794 | if (IS_ERR(inst)) { |
| 795 | ret = PTR_ERR(inst); |
Michal Miroslaw | f414c16 | 2007-03-23 11:11:31 -0700 | [diff] [blame] | 796 | goto out; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 797 | } |
| 798 | break; |
| 799 | case NFULNL_CFG_CMD_UNBIND: |
| 800 | if (!inst) { |
| 801 | ret = -ENODEV; |
Michal Miroslaw | f414c16 | 2007-03-23 11:11:31 -0700 | [diff] [blame] | 802 | goto out; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 803 | } |
| 804 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 805 | instance_destroy(inst); |
Alexey Dobriyan | a49c650 | 2010-02-26 17:48:40 +0100 | [diff] [blame] | 806 | goto out_put; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 807 | default: |
Patrick McHardy | cd21f0a | 2007-12-17 22:40:19 -0800 | [diff] [blame] | 808 | ret = -ENOTSUPP; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 809 | break; |
| 810 | } |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 811 | } |
| 812 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 813 | if (nfula[NFULA_CFG_MODE]) { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 814 | struct nfulnl_msg_config_mode *params; |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 815 | params = nla_data(nfula[NFULA_CFG_MODE]); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 816 | |
Patrick McHardy | c0506365 | 2007-12-17 22:39:55 -0800 | [diff] [blame] | 817 | if (!inst) { |
| 818 | ret = -ENODEV; |
| 819 | goto out; |
| 820 | } |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 821 | nfulnl_set_mode(inst, params->copy_mode, |
Al Viro | d1208b999 | 2006-11-03 00:58:41 -0800 | [diff] [blame] | 822 | ntohl(params->copy_range)); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 823 | } |
| 824 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 825 | if (nfula[NFULA_CFG_TIMEOUT]) { |
Patrick McHardy | 0dfedd2 | 2007-12-17 22:41:35 -0800 | [diff] [blame] | 826 | __be32 timeout = nla_get_be32(nfula[NFULA_CFG_TIMEOUT]); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 827 | |
Patrick McHardy | c0506365 | 2007-12-17 22:39:55 -0800 | [diff] [blame] | 828 | if (!inst) { |
| 829 | ret = -ENODEV; |
| 830 | goto out; |
| 831 | } |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 832 | nfulnl_set_timeout(inst, ntohl(timeout)); |
| 833 | } |
| 834 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 835 | if (nfula[NFULA_CFG_NLBUFSIZ]) { |
Patrick McHardy | 0dfedd2 | 2007-12-17 22:41:35 -0800 | [diff] [blame] | 836 | __be32 nlbufsiz = nla_get_be32(nfula[NFULA_CFG_NLBUFSIZ]); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 837 | |
Patrick McHardy | c0506365 | 2007-12-17 22:39:55 -0800 | [diff] [blame] | 838 | if (!inst) { |
| 839 | ret = -ENODEV; |
| 840 | goto out; |
| 841 | } |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 842 | nfulnl_set_nlbufsiz(inst, ntohl(nlbufsiz)); |
| 843 | } |
| 844 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 845 | if (nfula[NFULA_CFG_QTHRESH]) { |
Patrick McHardy | 0dfedd2 | 2007-12-17 22:41:35 -0800 | [diff] [blame] | 846 | __be32 qthresh = nla_get_be32(nfula[NFULA_CFG_QTHRESH]); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 847 | |
Patrick McHardy | c0506365 | 2007-12-17 22:39:55 -0800 | [diff] [blame] | 848 | if (!inst) { |
| 849 | ret = -ENODEV; |
| 850 | goto out; |
| 851 | } |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 852 | nfulnl_set_qthresh(inst, ntohl(qthresh)); |
| 853 | } |
| 854 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 855 | if (nfula[NFULA_CFG_FLAGS]) { |
Patrick McHardy | 0dfedd2 | 2007-12-17 22:41:35 -0800 | [diff] [blame] | 856 | __be16 flags = nla_get_be16(nfula[NFULA_CFG_FLAGS]); |
Patrick McHardy | c0506365 | 2007-12-17 22:39:55 -0800 | [diff] [blame] | 857 | |
| 858 | if (!inst) { |
| 859 | ret = -ENODEV; |
| 860 | goto out; |
| 861 | } |
Patrick McHardy | ee43353 | 2006-05-19 02:17:18 -0700 | [diff] [blame] | 862 | nfulnl_set_flags(inst, ntohs(flags)); |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 863 | } |
| 864 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 865 | out_put: |
| 866 | instance_put(inst); |
Michal Miroslaw | dd16704e | 2007-03-04 15:59:20 -0800 | [diff] [blame] | 867 | out: |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 868 | return ret; |
| 869 | } |
| 870 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 871 | static const struct nfnl_callback nfulnl_cb[NFULNL_MSG_MAX] = { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 872 | [NFULNL_MSG_PACKET] = { .call = nfulnl_recv_unsupp, |
Harald Welte | 37d2e7a | 2005-11-14 15:24:59 -0800 | [diff] [blame] | 873 | .attr_count = NFULA_MAX, }, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 874 | [NFULNL_MSG_CONFIG] = { .call = nfulnl_recv_config, |
Patrick McHardy | fd8281a | 2007-09-28 14:39:09 -0700 | [diff] [blame] | 875 | .attr_count = NFULA_CFG_MAX, |
| 876 | .policy = nfula_cfg_policy }, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 877 | }; |
| 878 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 879 | static const struct nfnetlink_subsystem nfulnl_subsys = { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 880 | .name = "log", |
| 881 | .subsys_id = NFNL_SUBSYS_ULOG, |
| 882 | .cb_count = NFULNL_MSG_MAX, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 883 | .cb = nfulnl_cb, |
| 884 | }; |
| 885 | |
| 886 | #ifdef CONFIG_PROC_FS |
| 887 | struct iter_state { |
| 888 | unsigned int bucket; |
| 889 | }; |
| 890 | |
Michal Miroslaw | f76cdce | 2007-03-23 11:12:03 -0700 | [diff] [blame] | 891 | static struct hlist_node *get_first(struct iter_state *st) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 892 | { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 893 | if (!st) |
| 894 | return NULL; |
| 895 | |
| 896 | for (st->bucket = 0; st->bucket < INSTANCE_BUCKETS; st->bucket++) { |
| 897 | if (!hlist_empty(&instance_table[st->bucket])) |
Eric Dumazet | 0e60ebe | 2010-11-15 18:17:21 +0100 | [diff] [blame] | 898 | return rcu_dereference_bh(hlist_first_rcu(&instance_table[st->bucket])); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 899 | } |
| 900 | return NULL; |
| 901 | } |
| 902 | |
Michal Miroslaw | f76cdce | 2007-03-23 11:12:03 -0700 | [diff] [blame] | 903 | static struct hlist_node *get_next(struct iter_state *st, struct hlist_node *h) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 904 | { |
Eric Dumazet | 0e60ebe | 2010-11-15 18:17:21 +0100 | [diff] [blame] | 905 | h = rcu_dereference_bh(hlist_next_rcu(h)); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 906 | while (!h) { |
| 907 | if (++st->bucket >= INSTANCE_BUCKETS) |
| 908 | return NULL; |
| 909 | |
Eric Dumazet | 0e60ebe | 2010-11-15 18:17:21 +0100 | [diff] [blame] | 910 | h = rcu_dereference_bh(hlist_first_rcu(&instance_table[st->bucket])); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 911 | } |
| 912 | return h; |
| 913 | } |
| 914 | |
Michal Miroslaw | f76cdce | 2007-03-23 11:12:03 -0700 | [diff] [blame] | 915 | static struct hlist_node *get_idx(struct iter_state *st, loff_t pos) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 916 | { |
| 917 | struct hlist_node *head; |
Michal Miroslaw | f76cdce | 2007-03-23 11:12:03 -0700 | [diff] [blame] | 918 | head = get_first(st); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 919 | |
| 920 | if (head) |
Michal Miroslaw | f76cdce | 2007-03-23 11:12:03 -0700 | [diff] [blame] | 921 | while (pos && (head = get_next(st, head))) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 922 | pos--; |
| 923 | return pos ? NULL : head; |
| 924 | } |
| 925 | |
| 926 | static void *seq_start(struct seq_file *seq, loff_t *pos) |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 927 | __acquires(rcu_bh) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 928 | { |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 929 | rcu_read_lock_bh(); |
Michal Miroslaw | f76cdce | 2007-03-23 11:12:03 -0700 | [diff] [blame] | 930 | return get_idx(seq->private, *pos); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 931 | } |
| 932 | |
| 933 | static void *seq_next(struct seq_file *s, void *v, loff_t *pos) |
| 934 | { |
| 935 | (*pos)++; |
Michal Miroslaw | f76cdce | 2007-03-23 11:12:03 -0700 | [diff] [blame] | 936 | return get_next(s->private, v); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 937 | } |
| 938 | |
| 939 | static void seq_stop(struct seq_file *s, void *v) |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 940 | __releases(rcu_bh) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 941 | { |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 942 | rcu_read_unlock_bh(); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 943 | } |
| 944 | |
| 945 | static int seq_show(struct seq_file *s, void *v) |
| 946 | { |
| 947 | const struct nfulnl_instance *inst = v; |
| 948 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 949 | return seq_printf(s, "%5d %6d %5d %1d %5d %6d %2d\n", |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 950 | inst->group_num, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 951 | inst->peer_portid, inst->qlen, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 952 | inst->copy_mode, inst->copy_range, |
| 953 | inst->flushtimeout, atomic_read(&inst->use)); |
| 954 | } |
| 955 | |
Philippe De Muyter | 56b3d97 | 2007-07-10 23:07:31 -0700 | [diff] [blame] | 956 | static const struct seq_operations nful_seq_ops = { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 957 | .start = seq_start, |
| 958 | .next = seq_next, |
| 959 | .stop = seq_stop, |
| 960 | .show = seq_show, |
| 961 | }; |
| 962 | |
| 963 | static int nful_open(struct inode *inode, struct file *file) |
| 964 | { |
Pavel Emelyanov | e2da591 | 2007-10-10 02:29:58 -0700 | [diff] [blame] | 965 | return seq_open_private(file, &nful_seq_ops, |
| 966 | sizeof(struct iter_state)); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 967 | } |
| 968 | |
Arjan van de Ven | da7071d | 2007-02-12 00:55:36 -0800 | [diff] [blame] | 969 | static const struct file_operations nful_file_ops = { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 970 | .owner = THIS_MODULE, |
| 971 | .open = nful_open, |
| 972 | .read = seq_read, |
| 973 | .llseek = seq_lseek, |
| 974 | .release = seq_release_private, |
| 975 | }; |
| 976 | |
| 977 | #endif /* PROC_FS */ |
| 978 | |
Patrick McHardy | 32292a7 | 2006-04-06 14:11:30 -0700 | [diff] [blame] | 979 | static int __init nfnetlink_log_init(void) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 980 | { |
| 981 | int i, status = -ENOMEM; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 982 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 983 | for (i = 0; i < INSTANCE_BUCKETS; i++) |
| 984 | INIT_HLIST_HEAD(&instance_table[i]); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 985 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 986 | /* it's not really all that important to have a random value, so |
| 987 | * we can do this from the init function, even if there hasn't |
| 988 | * been that much entropy yet */ |
| 989 | get_random_bytes(&hash_init, sizeof(hash_init)); |
| 990 | |
| 991 | netlink_register_notifier(&nfulnl_rtnl_notifier); |
| 992 | status = nfnetlink_subsys_register(&nfulnl_subsys); |
| 993 | if (status < 0) { |
| 994 | printk(KERN_ERR "log: failed to create netlink socket\n"); |
| 995 | goto cleanup_netlink_notifier; |
| 996 | } |
| 997 | |
Eric Leblond | ca735b3 | 2009-03-16 14:54:21 +0100 | [diff] [blame] | 998 | status = nf_log_register(NFPROTO_UNSPEC, &nfulnl_logger); |
| 999 | if (status < 0) { |
| 1000 | printk(KERN_ERR "log: failed to register logger\n"); |
| 1001 | goto cleanup_subsys; |
| 1002 | } |
| 1003 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1004 | #ifdef CONFIG_PROC_FS |
Denis V. Lunev | 8eeee8b | 2008-03-27 16:55:53 -0700 | [diff] [blame] | 1005 | if (!proc_create("nfnetlink_log", 0440, |
Julia Lawall | 6fc09f1 | 2012-08-29 06:49:17 +0000 | [diff] [blame] | 1006 | proc_net_netfilter, &nful_file_ops)) { |
| 1007 | status = -ENOMEM; |
Eric Leblond | ca735b3 | 2009-03-16 14:54:21 +0100 | [diff] [blame] | 1008 | goto cleanup_logger; |
Julia Lawall | 6fc09f1 | 2012-08-29 06:49:17 +0000 | [diff] [blame] | 1009 | } |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1010 | #endif |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1011 | return status; |
| 1012 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1013 | #ifdef CONFIG_PROC_FS |
Eric Leblond | ca735b3 | 2009-03-16 14:54:21 +0100 | [diff] [blame] | 1014 | cleanup_logger: |
| 1015 | nf_log_unregister(&nfulnl_logger); |
| 1016 | #endif |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1017 | cleanup_subsys: |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1018 | nfnetlink_subsys_unregister(&nfulnl_subsys); |
| 1019 | cleanup_netlink_notifier: |
| 1020 | netlink_unregister_notifier(&nfulnl_rtnl_notifier); |
| 1021 | return status; |
| 1022 | } |
| 1023 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 1024 | static void __exit nfnetlink_log_fini(void) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1025 | { |
Patrick McHardy | e92ad99 | 2007-02-12 11:11:55 -0800 | [diff] [blame] | 1026 | nf_log_unregister(&nfulnl_logger); |
Patrick McHardy | 32292a7 | 2006-04-06 14:11:30 -0700 | [diff] [blame] | 1027 | #ifdef CONFIG_PROC_FS |
| 1028 | remove_proc_entry("nfnetlink_log", proc_net_netfilter); |
| 1029 | #endif |
| 1030 | nfnetlink_subsys_unregister(&nfulnl_subsys); |
| 1031 | netlink_unregister_notifier(&nfulnl_rtnl_notifier); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1032 | } |
| 1033 | |
| 1034 | MODULE_DESCRIPTION("netfilter userspace logging"); |
| 1035 | MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>"); |
| 1036 | MODULE_LICENSE("GPL"); |
Harald Welte | f682fae | 2005-08-09 20:20:34 -0700 | [diff] [blame] | 1037 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_ULOG); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1038 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 1039 | module_init(nfnetlink_log_init); |
| 1040 | module_exit(nfnetlink_log_fini); |