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 | */ |
Marcelo Leitner | beacd3e | 2014-11-06 12:32:30 +0100 | [diff] [blame] | 15 | |
| 16 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 17 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 18 | #include <linux/module.h> |
| 19 | #include <linux/skbuff.h> |
Pablo Neira Ayuso | e035edd | 2012-12-17 01:12:00 +0100 | [diff] [blame] | 20 | #include <linux/if_arp.h> |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 21 | #include <linux/init.h> |
| 22 | #include <linux/ip.h> |
| 23 | #include <linux/ipv6.h> |
| 24 | #include <linux/netdevice.h> |
| 25 | #include <linux/netfilter.h> |
Florian Westphal | c737b7c | 2015-04-02 14:31:41 +0200 | [diff] [blame] | 26 | #include <linux/netfilter_bridge.h> |
Hong zhi guo | 573ce26 | 2013-03-27 06:47:04 +0000 | [diff] [blame] | 27 | #include <net/netlink.h> |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 28 | #include <linux/netfilter/nfnetlink.h> |
| 29 | #include <linux/netfilter/nfnetlink_log.h> |
Ken-ichirou MATSUZAWA | a29a9a5 | 2015-10-05 11:50:46 +0900 | [diff] [blame] | 30 | #include <linux/netfilter/nf_conntrack_common.h> |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 31 | #include <linux/spinlock.h> |
| 32 | #include <linux/sysctl.h> |
| 33 | #include <linux/proc_fs.h> |
| 34 | #include <linux/security.h> |
| 35 | #include <linux/list.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 36 | #include <linux/slab.h> |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 37 | #include <net/sock.h> |
Patrick McHardy | f01ffbd | 2007-12-17 22:38:49 -0800 | [diff] [blame] | 38 | #include <net/netfilter/nf_log.h> |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 39 | #include <net/netns/generic.h> |
Patrick McHardy | d9e1500 | 2008-11-18 12:16:52 +0100 | [diff] [blame] | 40 | #include <net/netfilter/nfnetlink_log.h> |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 41 | |
Arun Sharma | 60063497 | 2011-07-26 16:09:06 -0700 | [diff] [blame] | 42 | #include <linux/atomic.h> |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 43 | |
Pablo Neira Ayuso | 1109a90 | 2014-10-01 11:19:17 +0200 | [diff] [blame] | 44 | #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 45 | #include "../bridge/br_private.h" |
| 46 | #endif |
| 47 | |
Holger Eitzenberger | c2db292 | 2006-02-04 02:13:14 -0800 | [diff] [blame] | 48 | #define NFULNL_NLBUFSIZ_DEFAULT NLMSG_GOODSIZE |
Eric Leblond | 2c6764b | 2009-02-18 15:29:49 +0100 | [diff] [blame] | 49 | #define NFULNL_TIMEOUT_DEFAULT 100 /* every second */ |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 50 | #define NFULNL_QTHRESH_DEFAULT 100 /* 100 packets */ |
Florian Westphal | c1e7dc9 | 2014-10-23 10:36:07 +0200 | [diff] [blame] | 51 | /* max packet size is limited by 16-bit struct nfattr nfa_len field */ |
| 52 | #define NFULNL_COPY_RANGE_MAX (0xFFFF - NLA_HDRLEN) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 53 | |
| 54 | #define PRINTR(x, args...) do { if (net_ratelimit()) \ |
| 55 | printk(x, ## args); } while (0); |
| 56 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 57 | struct nfulnl_instance { |
| 58 | struct hlist_node hlist; /* global list of instances */ |
| 59 | spinlock_t lock; |
| 60 | atomic_t use; /* use count */ |
| 61 | |
| 62 | unsigned int qlen; /* number of nlmsgs in skb */ |
| 63 | struct sk_buff *skb; /* pre-allocatd skb */ |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 64 | struct timer_list timer; |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 65 | struct net *net; |
Eric W. Biederman | 9eea951 | 2012-05-25 10:42:54 -0600 | [diff] [blame] | 66 | struct user_namespace *peer_user_ns; /* User namespace of the peer process */ |
Richard Weinberger | cc6bc44 | 2015-04-13 00:52:37 +0200 | [diff] [blame] | 67 | u32 peer_portid; /* PORTID of the peer process */ |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 68 | |
| 69 | /* configurable parameters */ |
| 70 | unsigned int flushtimeout; /* timeout until queue flush */ |
| 71 | unsigned int nlbufsiz; /* netlink buffer allocation size */ |
| 72 | unsigned int qthreshold; /* threshold of the queue */ |
| 73 | u_int32_t copy_range; |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 74 | u_int32_t seq; /* instance-local sequential counter */ |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 75 | u_int16_t group_num; /* number of this queue */ |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 76 | u_int16_t flags; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 77 | u_int8_t copy_mode; |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 78 | struct rcu_head rcu; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 79 | }; |
| 80 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 81 | #define INSTANCE_BUCKETS 16 |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 82 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 83 | static int nfnl_log_net_id __read_mostly; |
| 84 | |
| 85 | struct nfnl_log_net { |
| 86 | spinlock_t instances_lock; |
| 87 | struct hlist_head instance_table[INSTANCE_BUCKETS]; |
| 88 | atomic_t global_seq; |
| 89 | }; |
| 90 | |
| 91 | static struct nfnl_log_net *nfnl_log_pernet(struct net *net) |
| 92 | { |
| 93 | return net_generic(net, nfnl_log_net_id); |
| 94 | } |
| 95 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 96 | static inline u_int8_t instance_hashfn(u_int16_t group_num) |
| 97 | { |
| 98 | return ((group_num & 0xff) % INSTANCE_BUCKETS); |
| 99 | } |
| 100 | |
| 101 | static struct nfulnl_instance * |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 102 | __instance_lookup(struct nfnl_log_net *log, u_int16_t group_num) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 103 | { |
| 104 | struct hlist_head *head; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 105 | struct nfulnl_instance *inst; |
| 106 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 107 | head = &log->instance_table[instance_hashfn(group_num)]; |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 108 | hlist_for_each_entry_rcu(inst, head, hlist) { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 109 | if (inst->group_num == group_num) |
| 110 | return inst; |
| 111 | } |
| 112 | return NULL; |
| 113 | } |
| 114 | |
| 115 | static inline void |
| 116 | instance_get(struct nfulnl_instance *inst) |
| 117 | { |
| 118 | atomic_inc(&inst->use); |
| 119 | } |
| 120 | |
| 121 | static struct nfulnl_instance * |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 122 | 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] | 123 | { |
| 124 | struct nfulnl_instance *inst; |
| 125 | |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 126 | rcu_read_lock_bh(); |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 127 | inst = __instance_lookup(log, group_num); |
Eric Dumazet | f5c5440 | 2010-06-14 16:15:23 +0200 | [diff] [blame] | 128 | if (inst && !atomic_inc_not_zero(&inst->use)) |
| 129 | inst = NULL; |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 130 | rcu_read_unlock_bh(); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 131 | |
| 132 | return inst; |
| 133 | } |
| 134 | |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 135 | static void nfulnl_instance_free_rcu(struct rcu_head *head) |
| 136 | { |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 137 | struct nfulnl_instance *inst = |
| 138 | container_of(head, struct nfulnl_instance, rcu); |
| 139 | |
| 140 | put_net(inst->net); |
| 141 | kfree(inst); |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 142 | module_put(THIS_MODULE); |
| 143 | } |
| 144 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 145 | static void |
| 146 | instance_put(struct nfulnl_instance *inst) |
| 147 | { |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 148 | if (inst && atomic_dec_and_test(&inst->use)) |
| 149 | call_rcu_bh(&inst->rcu, nfulnl_instance_free_rcu); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 150 | } |
| 151 | |
| 152 | static void nfulnl_timer(unsigned long data); |
| 153 | |
| 154 | static struct nfulnl_instance * |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 155 | instance_create(struct net *net, u_int16_t group_num, |
Richard Weinberger | cc6bc44 | 2015-04-13 00:52:37 +0200 | [diff] [blame] | 156 | u32 portid, struct user_namespace *user_ns) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 157 | { |
| 158 | struct nfulnl_instance *inst; |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 159 | struct nfnl_log_net *log = nfnl_log_pernet(net); |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 160 | int err; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 161 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 162 | spin_lock_bh(&log->instances_lock); |
| 163 | if (__instance_lookup(log, group_num)) { |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 164 | err = -EEXIST; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 165 | goto out_unlock; |
| 166 | } |
| 167 | |
Harald Welte | 10dfdc6 | 2005-11-03 19:20:07 +0100 | [diff] [blame] | 168 | inst = kzalloc(sizeof(*inst), GFP_ATOMIC); |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 169 | if (!inst) { |
| 170 | err = -ENOMEM; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 171 | goto out_unlock; |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 172 | } |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 173 | |
Michal Miroslaw | aace57e | 2007-09-28 14:45:27 -0700 | [diff] [blame] | 174 | if (!try_module_get(THIS_MODULE)) { |
| 175 | kfree(inst); |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 176 | err = -EAGAIN; |
Michal Miroslaw | aace57e | 2007-09-28 14:45:27 -0700 | [diff] [blame] | 177 | goto out_unlock; |
| 178 | } |
| 179 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 180 | INIT_HLIST_NODE(&inst->hlist); |
YOSHIFUJI Hideaki | 181a46a | 2006-01-04 13:56:54 -0800 | [diff] [blame] | 181 | spin_lock_init(&inst->lock); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 182 | /* needs to be two, since we _put() after creation */ |
| 183 | atomic_set(&inst->use, 2); |
| 184 | |
Patrick McHardy | e6f689d | 2007-03-23 11:16:30 -0700 | [diff] [blame] | 185 | setup_timer(&inst->timer, nfulnl_timer, (unsigned long)inst); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 186 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 187 | inst->net = get_net(net); |
Eric W. Biederman | 9eea951 | 2012-05-25 10:42:54 -0600 | [diff] [blame] | 188 | inst->peer_user_ns = user_ns; |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 189 | inst->peer_portid = portid; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 190 | inst->group_num = group_num; |
| 191 | |
| 192 | inst->qthreshold = NFULNL_QTHRESH_DEFAULT; |
| 193 | inst->flushtimeout = NFULNL_TIMEOUT_DEFAULT; |
| 194 | inst->nlbufsiz = NFULNL_NLBUFSIZ_DEFAULT; |
| 195 | inst->copy_mode = NFULNL_COPY_PACKET; |
Michal Miroslaw | 6b6ec99 | 2007-09-28 14:45:52 -0700 | [diff] [blame] | 196 | inst->copy_range = NFULNL_COPY_RANGE_MAX; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 197 | |
Eric Dumazet | f5c5440 | 2010-06-14 16:15:23 +0200 | [diff] [blame] | 198 | hlist_add_head_rcu(&inst->hlist, |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 199 | &log->instance_table[instance_hashfn(group_num)]); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 200 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 201 | |
| 202 | spin_unlock_bh(&log->instances_lock); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 203 | |
| 204 | return inst; |
| 205 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 206 | out_unlock: |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 207 | spin_unlock_bh(&log->instances_lock); |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 208 | return ERR_PTR(err); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 209 | } |
| 210 | |
Michal Miroslaw | e356706 | 2007-09-28 14:44:21 -0700 | [diff] [blame] | 211 | static void __nfulnl_flush(struct nfulnl_instance *inst); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 212 | |
Eric Dumazet | f5c5440 | 2010-06-14 16:15:23 +0200 | [diff] [blame] | 213 | /* called with BH disabled */ |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 214 | static void |
Patrick McHardy | 9afdb00 | 2007-03-23 11:12:50 -0700 | [diff] [blame] | 215 | __instance_destroy(struct nfulnl_instance *inst) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 216 | { |
| 217 | /* first pull it out of the global list */ |
Eric Dumazet | f5c5440 | 2010-06-14 16:15:23 +0200 | [diff] [blame] | 218 | hlist_del_rcu(&inst->hlist); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 219 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 220 | /* then flush all pending packets from skb */ |
| 221 | |
Eric Dumazet | f5c5440 | 2010-06-14 16:15:23 +0200 | [diff] [blame] | 222 | spin_lock(&inst->lock); |
| 223 | |
| 224 | /* lockless readers wont be able to use us */ |
| 225 | inst->copy_mode = NFULNL_COPY_DISABLED; |
| 226 | |
Michal Miroslaw | e356706 | 2007-09-28 14:44:21 -0700 | [diff] [blame] | 227 | if (inst->skb) |
| 228 | __nfulnl_flush(inst); |
Eric Dumazet | f5c5440 | 2010-06-14 16:15:23 +0200 | [diff] [blame] | 229 | spin_unlock(&inst->lock); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 230 | |
| 231 | /* and finally put the refcount */ |
| 232 | instance_put(inst); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 233 | } |
| 234 | |
| 235 | static inline void |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 236 | instance_destroy(struct nfnl_log_net *log, |
| 237 | struct nfulnl_instance *inst) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 238 | { |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 239 | spin_lock_bh(&log->instances_lock); |
Patrick McHardy | 9afdb00 | 2007-03-23 11:12:50 -0700 | [diff] [blame] | 240 | __instance_destroy(inst); |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 241 | spin_unlock_bh(&log->instances_lock); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 242 | } |
| 243 | |
| 244 | static int |
| 245 | nfulnl_set_mode(struct nfulnl_instance *inst, u_int8_t mode, |
| 246 | unsigned int range) |
| 247 | { |
| 248 | int status = 0; |
| 249 | |
| 250 | spin_lock_bh(&inst->lock); |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 251 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 252 | switch (mode) { |
| 253 | case NFULNL_COPY_NONE: |
| 254 | case NFULNL_COPY_META: |
| 255 | inst->copy_mode = mode; |
| 256 | inst->copy_range = 0; |
| 257 | break; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 258 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 259 | case NFULNL_COPY_PACKET: |
| 260 | inst->copy_mode = mode; |
Florian Westphal | c1e7dc9 | 2014-10-23 10:36:07 +0200 | [diff] [blame] | 261 | if (range == 0) |
| 262 | range = NFULNL_COPY_RANGE_MAX; |
Michal Miroslaw | 6b6ec99 | 2007-09-28 14:45:52 -0700 | [diff] [blame] | 263 | inst->copy_range = min_t(unsigned int, |
| 264 | range, NFULNL_COPY_RANGE_MAX); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 265 | break; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 266 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 267 | default: |
| 268 | status = -EINVAL; |
| 269 | break; |
| 270 | } |
| 271 | |
| 272 | spin_unlock_bh(&inst->lock); |
| 273 | |
| 274 | return status; |
| 275 | } |
| 276 | |
| 277 | static int |
| 278 | nfulnl_set_nlbufsiz(struct nfulnl_instance *inst, u_int32_t nlbufsiz) |
| 279 | { |
| 280 | int status; |
| 281 | |
| 282 | spin_lock_bh(&inst->lock); |
| 283 | if (nlbufsiz < NFULNL_NLBUFSIZ_DEFAULT) |
| 284 | status = -ERANGE; |
| 285 | else if (nlbufsiz > 131072) |
| 286 | status = -ERANGE; |
| 287 | else { |
| 288 | inst->nlbufsiz = nlbufsiz; |
| 289 | status = 0; |
| 290 | } |
| 291 | spin_unlock_bh(&inst->lock); |
| 292 | |
| 293 | return status; |
| 294 | } |
| 295 | |
Rosen, Rami | 23509fc | 2015-12-08 07:09:24 -0500 | [diff] [blame] | 296 | static void |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 297 | nfulnl_set_timeout(struct nfulnl_instance *inst, u_int32_t timeout) |
| 298 | { |
| 299 | spin_lock_bh(&inst->lock); |
| 300 | inst->flushtimeout = timeout; |
| 301 | spin_unlock_bh(&inst->lock); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 302 | } |
| 303 | |
Rosen, Rami | 23509fc | 2015-12-08 07:09:24 -0500 | [diff] [blame] | 304 | static void |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 305 | nfulnl_set_qthresh(struct nfulnl_instance *inst, u_int32_t qthresh) |
| 306 | { |
| 307 | spin_lock_bh(&inst->lock); |
| 308 | inst->qthreshold = qthresh; |
| 309 | spin_unlock_bh(&inst->lock); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 310 | } |
| 311 | |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 312 | static int |
| 313 | nfulnl_set_flags(struct nfulnl_instance *inst, u_int16_t flags) |
| 314 | { |
| 315 | spin_lock_bh(&inst->lock); |
Patrick McHardy | ee43353 | 2006-05-19 02:17:18 -0700 | [diff] [blame] | 316 | inst->flags = flags; |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 317 | spin_unlock_bh(&inst->lock); |
| 318 | |
| 319 | return 0; |
| 320 | } |
| 321 | |
Michal Miroslaw | c6a8f64 | 2007-09-28 14:45:06 -0700 | [diff] [blame] | 322 | static struct sk_buff * |
Gao feng | afff14f | 2013-09-23 19:20:56 +0800 | [diff] [blame] | 323 | nfulnl_alloc_skb(struct net *net, u32 peer_portid, unsigned int inst_size, |
| 324 | unsigned int pkt_size) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 325 | { |
| 326 | struct sk_buff *skb; |
Patrick McHardy | ad2ad0f | 2006-02-04 02:13:57 -0800 | [diff] [blame] | 327 | unsigned int n; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 328 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 329 | /* alloc skb which should be big enough for a whole multipart |
| 330 | * message. WARNING: has to be <= 128k due to slab restrictions */ |
| 331 | |
Patrick McHardy | ad2ad0f | 2006-02-04 02:13:57 -0800 | [diff] [blame] | 332 | n = max(inst_size, pkt_size); |
Florian Westphal | 905f0a7 | 2016-02-18 15:03:27 +0100 | [diff] [blame] | 333 | skb = alloc_skb(n, GFP_ATOMIC); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 334 | if (!skb) { |
Patrick McHardy | ad2ad0f | 2006-02-04 02:13:57 -0800 | [diff] [blame] | 335 | if (n > pkt_size) { |
| 336 | /* try to allocate only as much as we need for current |
| 337 | * packet */ |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 338 | |
Florian Westphal | 905f0a7 | 2016-02-18 15:03:27 +0100 | [diff] [blame] | 339 | skb = alloc_skb(pkt_size, GFP_ATOMIC); |
Patrick McHardy | ad2ad0f | 2006-02-04 02:13:57 -0800 | [diff] [blame] | 340 | } |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 341 | } |
| 342 | |
| 343 | return skb; |
| 344 | } |
| 345 | |
Houcheng Lin | b51d3fa | 2014-10-23 10:36:08 +0200 | [diff] [blame] | 346 | static void |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 347 | __nfulnl_send(struct nfulnl_instance *inst) |
| 348 | { |
David S. Miller | d550d09 | 2012-06-26 21:34:03 -0700 | [diff] [blame] | 349 | if (inst->qlen > 1) { |
| 350 | struct nlmsghdr *nlh = nlmsg_put(inst->skb, 0, 0, |
| 351 | NLMSG_DONE, |
| 352 | sizeof(struct nfgenmsg), |
| 353 | 0); |
Houcheng Lin | b51d3fa | 2014-10-23 10:36:08 +0200 | [diff] [blame] | 354 | if (WARN_ONCE(!nlh, "bad nlskb size: %u, tailroom %d\n", |
| 355 | inst->skb->len, skb_tailroom(inst->skb))) { |
| 356 | kfree_skb(inst->skb); |
David S. Miller | d550d09 | 2012-06-26 21:34:03 -0700 | [diff] [blame] | 357 | goto out; |
Houcheng Lin | b51d3fa | 2014-10-23 10:36:08 +0200 | [diff] [blame] | 358 | } |
David S. Miller | d550d09 | 2012-06-26 21:34:03 -0700 | [diff] [blame] | 359 | } |
Houcheng Lin | b51d3fa | 2014-10-23 10:36:08 +0200 | [diff] [blame] | 360 | nfnetlink_unicast(inst->skb, inst->net, inst->peer_portid, |
| 361 | MSG_DONTWAIT); |
| 362 | out: |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 363 | inst->qlen = 0; |
| 364 | inst->skb = NULL; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 365 | } |
| 366 | |
Michal Miroslaw | e356706 | 2007-09-28 14:44:21 -0700 | [diff] [blame] | 367 | static void |
| 368 | __nfulnl_flush(struct nfulnl_instance *inst) |
| 369 | { |
| 370 | /* timer holds a reference */ |
| 371 | if (del_timer(&inst->timer)) |
| 372 | instance_put(inst); |
| 373 | if (inst->skb) |
| 374 | __nfulnl_send(inst); |
| 375 | } |
| 376 | |
Michal Miroslaw | c6a8f64 | 2007-09-28 14:45:06 -0700 | [diff] [blame] | 377 | static void |
| 378 | nfulnl_timer(unsigned long data) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 379 | { |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 380 | struct nfulnl_instance *inst = (struct nfulnl_instance *)data; |
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 | spin_lock_bh(&inst->lock); |
Michal Miroslaw | 370e6a8 | 2007-03-23 11:12:21 -0700 | [diff] [blame] | 383 | if (inst->skb) |
| 384 | __nfulnl_send(inst); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 385 | spin_unlock_bh(&inst->lock); |
Michal Miroslaw | 05f7b7b | 2007-03-04 15:58:40 -0800 | [diff] [blame] | 386 | instance_put(inst); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 387 | } |
| 388 | |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 389 | /* This is an inline function, we don't really care about a long |
| 390 | * list of arguments */ |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 391 | static inline int |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 392 | __build_packet_message(struct nfnl_log_net *log, |
| 393 | struct nfulnl_instance *inst, |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 394 | const struct sk_buff *skb, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 395 | unsigned int data_len, |
Jan Engelhardt | 76108ce | 2008-10-08 11:35:00 +0200 | [diff] [blame] | 396 | u_int8_t pf, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 397 | unsigned int hooknum, |
| 398 | const struct net_device *indev, |
| 399 | const struct net_device *outdev, |
Ken-ichirou MATSUZAWA | a29a9a5 | 2015-10-05 11:50:46 +0900 | [diff] [blame] | 400 | const char *prefix, unsigned int plen, |
| 401 | const struct nfnl_ct_hook *nfnl_ct, |
| 402 | struct nf_conn *ct, enum ip_conntrack_info ctinfo) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 403 | { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 404 | struct nfulnl_msg_packet_hdr pmsg; |
| 405 | struct nlmsghdr *nlh; |
| 406 | struct nfgenmsg *nfmsg; |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 407 | sk_buff_data_t old_tail = inst->skb->tail; |
Eric Dumazet | 0626af3 | 2012-09-04 07:49:03 +0000 | [diff] [blame] | 408 | struct sock *sk; |
Bob Hockney | 0c36b48 | 2012-12-16 19:34:11 +0100 | [diff] [blame] | 409 | const unsigned char *hwhdrp; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 410 | |
David S. Miller | d550d09 | 2012-06-26 21:34:03 -0700 | [diff] [blame] | 411 | nlh = nlmsg_put(inst->skb, 0, 0, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 412 | NFNL_SUBSYS_ULOG << 8 | NFULNL_MSG_PACKET, |
David S. Miller | d550d09 | 2012-06-26 21:34:03 -0700 | [diff] [blame] | 413 | sizeof(struct nfgenmsg), 0); |
| 414 | if (!nlh) |
| 415 | return -1; |
| 416 | nfmsg = nlmsg_data(nlh); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 417 | nfmsg->nfgen_family = pf; |
| 418 | nfmsg->version = NFNETLINK_V0; |
| 419 | nfmsg->res_id = htons(inst->group_num); |
| 420 | |
Dan Carpenter | e4d091d | 2013-08-01 12:36:57 +0300 | [diff] [blame] | 421 | memset(&pmsg, 0, sizeof(pmsg)); |
Al Viro | febf0a4 | 2006-11-03 00:59:17 -0800 | [diff] [blame] | 422 | pmsg.hw_protocol = skb->protocol; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 423 | pmsg.hook = hooknum; |
| 424 | |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 425 | if (nla_put(inst->skb, NFULA_PACKET_HDR, sizeof(pmsg), &pmsg)) |
| 426 | goto nla_put_failure; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 427 | |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 428 | if (prefix && |
| 429 | nla_put(inst->skb, NFULA_PREFIX, plen, prefix)) |
| 430 | goto nla_put_failure; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 431 | |
| 432 | if (indev) { |
Pablo Neira Ayuso | 1109a90 | 2014-10-01 11:19:17 +0200 | [diff] [blame] | 433 | #if !IS_ENABLED(CONFIG_BRIDGE_NETFILTER) |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 434 | if (nla_put_be32(inst->skb, NFULA_IFINDEX_INDEV, |
| 435 | htonl(indev->ifindex))) |
| 436 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 437 | #else |
| 438 | if (pf == PF_BRIDGE) { |
| 439 | /* Case 1: outdev is physical input device, we need to |
| 440 | * look for bridge group (when called from |
| 441 | * netfilter_bridge) */ |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 442 | if (nla_put_be32(inst->skb, NFULA_IFINDEX_PHYSINDEV, |
| 443 | htonl(indev->ifindex)) || |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 444 | /* this is the bridge group "brX" */ |
Aaron Conole | e2361cb | 2016-09-21 11:35:04 -0400 | [diff] [blame] | 445 | /* rcu_read_lock()ed by nf_hook_thresh or |
| 446 | * nf_log_packet. |
| 447 | */ |
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 { |
Florian Westphal | c737b7c | 2015-04-02 14:31:41 +0200 | [diff] [blame] | 452 | struct net_device *physindev; |
| 453 | |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 454 | /* Case 2: indev is bridge group, we need to look for |
| 455 | * physical device (when called from ipv4) */ |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 456 | if (nla_put_be32(inst->skb, NFULA_IFINDEX_INDEV, |
| 457 | htonl(indev->ifindex))) |
| 458 | goto nla_put_failure; |
Florian Westphal | c737b7c | 2015-04-02 14:31:41 +0200 | [diff] [blame] | 459 | |
| 460 | physindev = nf_bridge_get_physindev(skb); |
| 461 | if (physindev && |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 462 | nla_put_be32(inst->skb, NFULA_IFINDEX_PHYSINDEV, |
Florian Westphal | c737b7c | 2015-04-02 14:31:41 +0200 | [diff] [blame] | 463 | htonl(physindev->ifindex))) |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 464 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 465 | } |
| 466 | #endif |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 467 | } |
| 468 | |
| 469 | if (outdev) { |
Pablo Neira Ayuso | 1109a90 | 2014-10-01 11:19:17 +0200 | [diff] [blame] | 470 | #if !IS_ENABLED(CONFIG_BRIDGE_NETFILTER) |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 471 | if (nla_put_be32(inst->skb, NFULA_IFINDEX_OUTDEV, |
| 472 | htonl(outdev->ifindex))) |
| 473 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 474 | #else |
| 475 | if (pf == PF_BRIDGE) { |
| 476 | /* Case 1: outdev is physical output device, we need to |
| 477 | * look for bridge group (when called from |
| 478 | * netfilter_bridge) */ |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 479 | if (nla_put_be32(inst->skb, NFULA_IFINDEX_PHYSOUTDEV, |
| 480 | htonl(outdev->ifindex)) || |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 481 | /* this is the bridge group "brX" */ |
Aaron Conole | e2361cb | 2016-09-21 11:35:04 -0400 | [diff] [blame] | 482 | /* rcu_read_lock()ed by nf_hook_thresh or |
| 483 | * nf_log_packet. |
| 484 | */ |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 485 | nla_put_be32(inst->skb, NFULA_IFINDEX_OUTDEV, |
| 486 | htonl(br_port_get_rcu(outdev)->br->dev->ifindex))) |
| 487 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 488 | } else { |
Florian Westphal | c737b7c | 2015-04-02 14:31:41 +0200 | [diff] [blame] | 489 | struct net_device *physoutdev; |
| 490 | |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 491 | /* Case 2: indev is a bridge group, we need to look |
| 492 | * for physical device (when called from ipv4) */ |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 493 | if (nla_put_be32(inst->skb, NFULA_IFINDEX_OUTDEV, |
| 494 | htonl(outdev->ifindex))) |
| 495 | goto nla_put_failure; |
Florian Westphal | c737b7c | 2015-04-02 14:31:41 +0200 | [diff] [blame] | 496 | |
| 497 | physoutdev = nf_bridge_get_physoutdev(skb); |
| 498 | if (physoutdev && |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 499 | nla_put_be32(inst->skb, NFULA_IFINDEX_PHYSOUTDEV, |
Florian Westphal | c737b7c | 2015-04-02 14:31:41 +0200 | [diff] [blame] | 500 | htonl(physoutdev->ifindex))) |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 501 | goto nla_put_failure; |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 502 | } |
| 503 | #endif |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 504 | } |
| 505 | |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 506 | if (skb->mark && |
| 507 | nla_put_be32(inst->skb, NFULA_MARK, htonl(skb->mark))) |
| 508 | goto nla_put_failure; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 509 | |
Nicolas Cavallari | 2c38de4 | 2011-06-16 17:27:04 +0200 | [diff] [blame] | 510 | if (indev && skb->dev && |
| 511 | skb->mac_header != skb->network_header) { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 512 | struct nfulnl_msg_packet_hw phw; |
Dan Carpenter | e4d091d | 2013-08-01 12:36:57 +0300 | [diff] [blame] | 513 | int len; |
| 514 | |
| 515 | memset(&phw, 0, sizeof(phw)); |
| 516 | len = dev_parse_header(skb, phw.hw_addr); |
Stephen Hemminger | b95cce3 | 2007-09-26 22:13:38 -0700 | [diff] [blame] | 517 | if (len > 0) { |
| 518 | phw.hw_addrlen = htons(len); |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 519 | if (nla_put(inst->skb, NFULA_HWADDR, sizeof(phw), &phw)) |
| 520 | goto nla_put_failure; |
Stephen Hemminger | b95cce3 | 2007-09-26 22:13:38 -0700 | [diff] [blame] | 521 | } |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 522 | } |
| 523 | |
Eric Leblond | 72961ec | 2008-07-21 10:02:35 -0700 | [diff] [blame] | 524 | if (indev && skb_mac_header_was_set(skb)) { |
Patrick McHardy | 2dba62c | 2012-08-19 10:16:08 +0000 | [diff] [blame] | 525 | 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] | 526 | nla_put_be16(inst->skb, NFULA_HWLEN, |
Bob Hockney | 0c36b48 | 2012-12-16 19:34:11 +0100 | [diff] [blame] | 527 | htons(skb->dev->hard_header_len))) |
| 528 | goto nla_put_failure; |
| 529 | |
| 530 | hwhdrp = skb_mac_header(skb); |
| 531 | |
| 532 | if (skb->dev->type == ARPHRD_SIT) |
| 533 | hwhdrp -= ETH_HLEN; |
| 534 | |
| 535 | if (hwhdrp >= skb->head && |
| 536 | nla_put(inst->skb, NFULA_HWHEADER, |
| 537 | skb->dev->hard_header_len, hwhdrp)) |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 538 | goto nla_put_failure; |
Eric Leblond | 72961ec | 2008-07-21 10:02:35 -0700 | [diff] [blame] | 539 | } |
| 540 | |
Eric Dumazet | b7aa0bf | 2007-04-19 16:16:32 -0700 | [diff] [blame] | 541 | if (skb->tstamp.tv64) { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 542 | struct nfulnl_msg_packet_timestamp ts; |
Arnd Bergmann | f6389ec | 2015-09-30 13:26:38 +0200 | [diff] [blame] | 543 | struct timespec64 kts = ktime_to_timespec64(skb->tstamp); |
| 544 | ts.sec = cpu_to_be64(kts.tv_sec); |
| 545 | ts.usec = cpu_to_be64(kts.tv_nsec / NSEC_PER_USEC); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 546 | |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 547 | if (nla_put(inst->skb, NFULA_TIMESTAMP, sizeof(ts), &ts)) |
| 548 | goto nla_put_failure; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 549 | } |
| 550 | |
| 551 | /* UID */ |
Eric Dumazet | 0626af3 | 2012-09-04 07:49:03 +0000 | [diff] [blame] | 552 | sk = skb->sk; |
Eric Dumazet | a839923 | 2015-03-16 21:06:15 -0700 | [diff] [blame] | 553 | if (sk && sk_fullsock(sk)) { |
Eric Dumazet | 0626af3 | 2012-09-04 07:49:03 +0000 | [diff] [blame] | 554 | read_lock_bh(&sk->sk_callback_lock); |
| 555 | if (sk->sk_socket && sk->sk_socket->file) { |
| 556 | struct file *file = sk->sk_socket->file; |
Linus Torvalds | 437589a | 2012-10-02 11:11:09 -0700 | [diff] [blame] | 557 | const struct cred *cred = file->f_cred; |
| 558 | struct user_namespace *user_ns = inst->peer_user_ns; |
| 559 | __be32 uid = htonl(from_kuid_munged(user_ns, cred->fsuid)); |
| 560 | __be32 gid = htonl(from_kgid_munged(user_ns, cred->fsgid)); |
Eric Dumazet | 0626af3 | 2012-09-04 07:49:03 +0000 | [diff] [blame] | 561 | read_unlock_bh(&sk->sk_callback_lock); |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 562 | if (nla_put_be32(inst->skb, NFULA_UID, uid) || |
| 563 | nla_put_be32(inst->skb, NFULA_GID, gid)) |
| 564 | goto nla_put_failure; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 565 | } else |
Eric Dumazet | 0626af3 | 2012-09-04 07:49:03 +0000 | [diff] [blame] | 566 | read_unlock_bh(&sk->sk_callback_lock); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 567 | } |
| 568 | |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 569 | /* local sequence number */ |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 570 | if ((inst->flags & NFULNL_CFG_F_SEQ) && |
| 571 | nla_put_be32(inst->skb, NFULA_SEQ, htonl(inst->seq++))) |
| 572 | goto nla_put_failure; |
Patrick McHardy | 0dfedd2 | 2007-12-17 22:41:35 -0800 | [diff] [blame] | 573 | |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 574 | /* global sequence number */ |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 575 | if ((inst->flags & NFULNL_CFG_F_SEQ_GLOBAL) && |
| 576 | nla_put_be32(inst->skb, NFULA_SEQ_GLOBAL, |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 577 | htonl(atomic_inc_return(&log->global_seq)))) |
David S. Miller | 1db20a5 | 2012-03-29 23:31:16 -0400 | [diff] [blame] | 578 | goto nla_put_failure; |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 579 | |
Ken-ichirou MATSUZAWA | a29a9a5 | 2015-10-05 11:50:46 +0900 | [diff] [blame] | 580 | if (ct && nfnl_ct->build(inst->skb, ct, ctinfo, |
| 581 | NFULA_CT, NFULA_CT_INFO) < 0) |
| 582 | goto nla_put_failure; |
| 583 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 584 | if (data_len) { |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 585 | struct nlattr *nla; |
| 586 | int size = nla_attr_size(data_len); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 587 | |
Pablo Neira Ayuso | 8225161 | 2014-11-06 12:32:28 +0100 | [diff] [blame] | 588 | if (skb_tailroom(inst->skb) < nla_total_size(data_len)) |
| 589 | goto nla_put_failure; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 590 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 591 | nla = (struct nlattr *)skb_put(inst->skb, nla_total_size(data_len)); |
| 592 | nla->nla_type = NFULA_PAYLOAD; |
| 593 | nla->nla_len = size; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 594 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 595 | if (skb_copy_bits(skb, 0, nla_data(nla), data_len)) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 596 | BUG(); |
| 597 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 598 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 599 | nlh->nlmsg_len = inst->skb->tail - old_tail; |
| 600 | return 0; |
| 601 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 602 | nla_put_failure: |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 603 | PRINTR(KERN_ERR "nfnetlink_log: error creating log nlmsg\n"); |
| 604 | return -1; |
| 605 | } |
| 606 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 607 | static struct nf_loginfo default_loginfo = { |
| 608 | .type = NF_LOG_TYPE_ULOG, |
| 609 | .u = { |
| 610 | .ulog = { |
| 611 | .copy_len = 0xffff, |
| 612 | .group = 0, |
| 613 | .qthreshold = 1, |
| 614 | }, |
| 615 | }, |
| 616 | }; |
| 617 | |
| 618 | /* log handler for internal netfilter logging api */ |
Eric Leblond | 5f7340e | 2008-11-04 14:21:08 +0100 | [diff] [blame] | 619 | void |
Hans Schillstrom | 8cdb46d | 2013-05-15 01:23:45 +0000 | [diff] [blame] | 620 | nfulnl_log_packet(struct net *net, |
| 621 | u_int8_t pf, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 622 | unsigned int hooknum, |
| 623 | const struct sk_buff *skb, |
| 624 | const struct net_device *in, |
| 625 | const struct net_device *out, |
| 626 | const struct nf_loginfo *li_user, |
| 627 | const char *prefix) |
| 628 | { |
Ken-ichirou MATSUZAWA | a29a9a5 | 2015-10-05 11:50:46 +0900 | [diff] [blame] | 629 | size_t size; |
| 630 | unsigned int data_len; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 631 | struct nfulnl_instance *inst; |
| 632 | const struct nf_loginfo *li; |
| 633 | unsigned int qthreshold; |
Patrick McHardy | d7a5c32 | 2006-11-29 02:35:34 +0100 | [diff] [blame] | 634 | unsigned int plen; |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 635 | struct nfnl_log_net *log = nfnl_log_pernet(net); |
Ken-ichirou MATSUZAWA | a29a9a5 | 2015-10-05 11:50:46 +0900 | [diff] [blame] | 636 | const struct nfnl_ct_hook *nfnl_ct = NULL; |
| 637 | struct nf_conn *ct = NULL; |
| 638 | enum ip_conntrack_info uninitialized_var(ctinfo); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 639 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 640 | if (li_user && li_user->type == NF_LOG_TYPE_ULOG) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 641 | li = li_user; |
| 642 | else |
| 643 | li = &default_loginfo; |
| 644 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 645 | inst = instance_lookup_get(log, li->u.ulog.group); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 646 | if (!inst) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 647 | return; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 648 | |
Patrick McHardy | d7a5c32 | 2006-11-29 02:35:34 +0100 | [diff] [blame] | 649 | plen = 0; |
| 650 | if (prefix) |
Patrick McHardy | 881dbfe | 2007-03-06 20:24:35 -0800 | [diff] [blame] | 651 | plen = strlen(prefix) + 1; |
Patrick McHardy | d7a5c32 | 2006-11-29 02:35:34 +0100 | [diff] [blame] | 652 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 653 | /* FIXME: do we want to make the size calculation conditional based on |
| 654 | * what is actually present? way more branches and checks, but more |
| 655 | * memory efficient... */ |
Hong zhi guo | 573ce26 | 2013-03-27 06:47:04 +0000 | [diff] [blame] | 656 | size = nlmsg_total_size(sizeof(struct nfgenmsg)) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 657 | + nla_total_size(sizeof(struct nfulnl_msg_packet_hdr)) |
| 658 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
| 659 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
Pablo Neira Ayuso | 1109a90 | 2014-10-01 11:19:17 +0200 | [diff] [blame] | 660 | #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 661 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
| 662 | + nla_total_size(sizeof(u_int32_t)) /* ifindex */ |
Harald Welte | fbcd923 | 2005-08-09 20:22:10 -0700 | [diff] [blame] | 663 | #endif |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 664 | + nla_total_size(sizeof(u_int32_t)) /* mark */ |
| 665 | + nla_total_size(sizeof(u_int32_t)) /* uid */ |
Patrick McHardy | 76aa1ce | 2007-12-17 22:41:52 -0800 | [diff] [blame] | 666 | + nla_total_size(sizeof(u_int32_t)) /* gid */ |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 667 | + nla_total_size(plen) /* prefix */ |
| 668 | + nla_total_size(sizeof(struct nfulnl_msg_packet_hw)) |
Florian Westphal | 9dfa1df | 2014-10-23 10:36:06 +0200 | [diff] [blame] | 669 | + nla_total_size(sizeof(struct nfulnl_msg_packet_timestamp)) |
| 670 | + nla_total_size(sizeof(struct nfgenmsg)); /* NLMSG_DONE */ |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 671 | |
Pablo Neira Ayuso | eeff9be | 2009-05-27 15:49:11 +0200 | [diff] [blame] | 672 | if (in && skb_mac_header_was_set(skb)) { |
| 673 | size += nla_total_size(skb->dev->hard_header_len) |
| 674 | + nla_total_size(sizeof(u_int16_t)) /* hwtype */ |
| 675 | + nla_total_size(sizeof(u_int16_t)); /* hwlen */ |
| 676 | } |
| 677 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 678 | spin_lock_bh(&inst->lock); |
| 679 | |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 680 | if (inst->flags & NFULNL_CFG_F_SEQ) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 681 | size += nla_total_size(sizeof(u_int32_t)); |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 682 | if (inst->flags & NFULNL_CFG_F_SEQ_GLOBAL) |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 683 | size += nla_total_size(sizeof(u_int32_t)); |
Ken-ichirou MATSUZAWA | a29a9a5 | 2015-10-05 11:50:46 +0900 | [diff] [blame] | 684 | if (inst->flags & NFULNL_CFG_F_CONNTRACK) { |
| 685 | nfnl_ct = rcu_dereference(nfnl_ct_hook); |
| 686 | if (nfnl_ct != NULL) { |
| 687 | ct = nfnl_ct->get_ct(skb, &ctinfo); |
| 688 | if (ct != NULL) |
| 689 | size += nfnl_ct->build_size(ct); |
| 690 | } |
| 691 | } |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 692 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 693 | qthreshold = inst->qthreshold; |
| 694 | /* per-rule qthreshold overrides per-instance */ |
Eric Leblond | 5ca431f | 2009-02-18 15:29:23 +0100 | [diff] [blame] | 695 | if (li->u.ulog.qthreshold) |
| 696 | if (qthreshold > li->u.ulog.qthreshold) |
| 697 | qthreshold = li->u.ulog.qthreshold; |
| 698 | |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 699 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 700 | switch (inst->copy_mode) { |
| 701 | case NFULNL_COPY_META: |
| 702 | case NFULNL_COPY_NONE: |
| 703 | data_len = 0; |
| 704 | break; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 705 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 706 | case NFULNL_COPY_PACKET: |
Vishwanath Pai | 7643507 | 2016-06-21 14:58:46 -0400 | [diff] [blame] | 707 | data_len = inst->copy_range; |
| 708 | if ((li->u.ulog.flags & NF_LOG_F_COPY_LEN) && |
| 709 | (li->u.ulog.copy_len < data_len)) |
| 710 | data_len = li->u.ulog.copy_len; |
| 711 | |
| 712 | if (data_len > skb->len) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 713 | data_len = skb->len; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 714 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 715 | size += nla_total_size(data_len); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 716 | break; |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 717 | |
Eric Dumazet | f5c5440 | 2010-06-14 16:15:23 +0200 | [diff] [blame] | 718 | case NFULNL_COPY_DISABLED: |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 719 | default: |
Michal Miroslaw | 55b5a91 | 2007-03-23 11:11:05 -0700 | [diff] [blame] | 720 | goto unlock_and_release; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 721 | } |
| 722 | |
Florian Westphal | 9dfa1df | 2014-10-23 10:36:06 +0200 | [diff] [blame] | 723 | if (inst->skb && size > skb_tailroom(inst->skb)) { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 724 | /* either the queue len is too high or we don't have |
| 725 | * enough room in the skb left. flush to userspace. */ |
Michal Miroslaw | e356706 | 2007-09-28 14:44:21 -0700 | [diff] [blame] | 726 | __nfulnl_flush(inst); |
Michal Miroslaw | 55b5a91 | 2007-03-23 11:11:05 -0700 | [diff] [blame] | 727 | } |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 728 | |
Michal Miroslaw | 55b5a91 | 2007-03-23 11:11:05 -0700 | [diff] [blame] | 729 | if (!inst->skb) { |
Gao feng | afff14f | 2013-09-23 19:20:56 +0800 | [diff] [blame] | 730 | inst->skb = nfulnl_alloc_skb(net, inst->peer_portid, |
| 731 | inst->nlbufsiz, size); |
Michal Miroslaw | 55b5a91 | 2007-03-23 11:11:05 -0700 | [diff] [blame] | 732 | if (!inst->skb) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 733 | goto alloc_failure; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 734 | } |
| 735 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 736 | inst->qlen++; |
| 737 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 738 | __build_packet_message(log, inst, skb, data_len, pf, |
Ken-ichirou MATSUZAWA | a29a9a5 | 2015-10-05 11:50:46 +0900 | [diff] [blame] | 739 | hooknum, in, out, prefix, plen, |
| 740 | nfnl_ct, ct, ctinfo); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 741 | |
Michal Miroslaw | d63b043 | 2007-09-28 14:44:44 -0700 | [diff] [blame] | 742 | if (inst->qlen >= qthreshold) |
| 743 | __nfulnl_flush(inst); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 744 | /* timer_pending always called within inst->lock, so there |
| 745 | * is no chance of a race here */ |
Michal Miroslaw | d63b043 | 2007-09-28 14:44:44 -0700 | [diff] [blame] | 746 | else if (!timer_pending(&inst->timer)) { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 747 | instance_get(inst); |
| 748 | inst->timer.expires = jiffies + (inst->flushtimeout*HZ/100); |
| 749 | add_timer(&inst->timer); |
| 750 | } |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 751 | |
Michal Miroslaw | ed32abe | 2007-03-04 15:58:15 -0800 | [diff] [blame] | 752 | unlock_and_release: |
| 753 | spin_unlock_bh(&inst->lock); |
| 754 | instance_put(inst); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 755 | return; |
| 756 | |
| 757 | alloc_failure: |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 758 | /* FIXME: statistics */ |
Michal Miroslaw | ed32abe | 2007-03-04 15:58:15 -0800 | [diff] [blame] | 759 | goto unlock_and_release; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 760 | } |
Eric Leblond | 5f7340e | 2008-11-04 14:21:08 +0100 | [diff] [blame] | 761 | EXPORT_SYMBOL_GPL(nfulnl_log_packet); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 762 | |
| 763 | static int |
| 764 | nfulnl_rcv_nl_event(struct notifier_block *this, |
| 765 | unsigned long event, void *ptr) |
| 766 | { |
| 767 | struct netlink_notify *n = ptr; |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 768 | struct nfnl_log_net *log = nfnl_log_pernet(n->net); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 769 | |
Patrick McHardy | dee5817 | 2009-11-06 17:04:00 +0100 | [diff] [blame] | 770 | if (event == NETLINK_URELEASE && n->protocol == NETLINK_NETFILTER) { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 771 | int i; |
| 772 | |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 773 | /* destroy all instances for this portid */ |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 774 | spin_lock_bh(&log->instances_lock); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 775 | for (i = 0; i < INSTANCE_BUCKETS; i++) { |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 776 | struct hlist_node *t2; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 777 | struct nfulnl_instance *inst; |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 778 | struct hlist_head *head = &log->instance_table[i]; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 779 | |
Sasha Levin | b67bfe0 | 2013-02-27 17:06:00 -0800 | [diff] [blame] | 780 | hlist_for_each_entry_safe(inst, t2, head, hlist) { |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 781 | if (n->portid == inst->peer_portid) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 782 | __instance_destroy(inst); |
| 783 | } |
| 784 | } |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 785 | spin_unlock_bh(&log->instances_lock); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 786 | } |
| 787 | return NOTIFY_DONE; |
| 788 | } |
| 789 | |
| 790 | static struct notifier_block nfulnl_rtnl_notifier = { |
| 791 | .notifier_call = nfulnl_rcv_nl_event, |
| 792 | }; |
| 793 | |
Pablo Neira Ayuso | 7b8002a | 2015-12-15 18:41:56 +0100 | [diff] [blame] | 794 | static int nfulnl_recv_unsupp(struct net *net, struct sock *ctnl, |
| 795 | struct sk_buff *skb, const struct nlmsghdr *nlh, |
| 796 | const struct nlattr * const nfqa[]) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 797 | { |
| 798 | return -ENOTSUPP; |
| 799 | } |
| 800 | |
Eric Leblond | ca735b3 | 2009-03-16 14:54:21 +0100 | [diff] [blame] | 801 | static struct nf_logger nfulnl_logger __read_mostly = { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 802 | .name = "nfnetlink_log", |
Pablo Neira Ayuso | 5962815 | 2014-06-18 19:24:30 +0200 | [diff] [blame] | 803 | .type = NF_LOG_TYPE_ULOG, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 804 | .logfn = &nfulnl_log_packet, |
| 805 | .me = THIS_MODULE, |
| 806 | }; |
| 807 | |
Patrick McHardy | fd8281a | 2007-09-28 14:39:09 -0700 | [diff] [blame] | 808 | static const struct nla_policy nfula_cfg_policy[NFULA_CFG_MAX+1] = { |
| 809 | [NFULA_CFG_CMD] = { .len = sizeof(struct nfulnl_msg_config_cmd) }, |
| 810 | [NFULA_CFG_MODE] = { .len = sizeof(struct nfulnl_msg_config_mode) }, |
| 811 | [NFULA_CFG_TIMEOUT] = { .type = NLA_U32 }, |
| 812 | [NFULA_CFG_QTHRESH] = { .type = NLA_U32 }, |
| 813 | [NFULA_CFG_NLBUFSIZ] = { .type = NLA_U32 }, |
| 814 | [NFULA_CFG_FLAGS] = { .type = NLA_U16 }, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 815 | }; |
| 816 | |
Pablo Neira Ayuso | 7b8002a | 2015-12-15 18:41:56 +0100 | [diff] [blame] | 817 | static int nfulnl_recv_config(struct net *net, struct sock *ctnl, |
| 818 | struct sk_buff *skb, const struct nlmsghdr *nlh, |
| 819 | const struct nlattr * const nfula[]) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 820 | { |
David S. Miller | d550d09 | 2012-06-26 21:34:03 -0700 | [diff] [blame] | 821 | struct nfgenmsg *nfmsg = nlmsg_data(nlh); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 822 | u_int16_t group_num = ntohs(nfmsg->res_id); |
| 823 | struct nfulnl_instance *inst; |
Patrick McHardy | b7047a1 | 2008-03-10 16:44:13 -0700 | [diff] [blame] | 824 | struct nfulnl_msg_config_cmd *cmd = NULL; |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 825 | struct nfnl_log_net *log = nfnl_log_pernet(net); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 826 | int ret = 0; |
Arnd Bergmann | c872a2d | 2015-11-10 13:08:15 +0100 | [diff] [blame] | 827 | u16 flags = 0; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 828 | |
Patrick McHardy | b7047a1 | 2008-03-10 16:44:13 -0700 | [diff] [blame] | 829 | if (nfula[NFULA_CFG_CMD]) { |
| 830 | u_int8_t pf = nfmsg->nfgen_family; |
| 831 | cmd = nla_data(nfula[NFULA_CFG_CMD]); |
| 832 | |
| 833 | /* Commands without queue context */ |
| 834 | switch (cmd->command) { |
| 835 | case NFULNL_CFG_CMD_PF_BIND: |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame] | 836 | return nf_log_bind_pf(net, pf, &nfulnl_logger); |
Patrick McHardy | b7047a1 | 2008-03-10 16:44:13 -0700 | [diff] [blame] | 837 | case NFULNL_CFG_CMD_PF_UNBIND: |
Gao feng | 30e0c6a | 2013-03-24 23:50:40 +0000 | [diff] [blame] | 838 | nf_log_unbind_pf(net, pf); |
Patrick McHardy | b7047a1 | 2008-03-10 16:44:13 -0700 | [diff] [blame] | 839 | return 0; |
| 840 | } |
| 841 | } |
| 842 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 843 | inst = instance_lookup_get(log, group_num); |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 844 | if (inst && inst->peer_portid != NETLINK_CB(skb).portid) { |
Patrick McHardy | c0506365 | 2007-12-17 22:39:55 -0800 | [diff] [blame] | 845 | ret = -EPERM; |
| 846 | goto out_put; |
| 847 | } |
| 848 | |
Pablo Neira | 8cbc870 | 2015-10-13 12:47:48 +0200 | [diff] [blame] | 849 | /* Check if we support these flags in first place, dependencies should |
| 850 | * be there too not to break atomicity. |
| 851 | */ |
| 852 | if (nfula[NFULA_CFG_FLAGS]) { |
| 853 | flags = ntohs(nla_get_be16(nfula[NFULA_CFG_FLAGS])); |
| 854 | |
| 855 | if ((flags & NFULNL_CFG_F_CONNTRACK) && |
| 856 | !rcu_access_pointer(nfnl_ct_hook)) { |
| 857 | #ifdef CONFIG_MODULES |
| 858 | nfnl_unlock(NFNL_SUBSYS_ULOG); |
| 859 | request_module("ip_conntrack_netlink"); |
| 860 | nfnl_lock(NFNL_SUBSYS_ULOG); |
| 861 | if (rcu_access_pointer(nfnl_ct_hook)) { |
| 862 | ret = -EAGAIN; |
| 863 | goto out_put; |
| 864 | } |
| 865 | #endif |
| 866 | ret = -EOPNOTSUPP; |
| 867 | goto out_put; |
| 868 | } |
| 869 | } |
| 870 | |
Patrick McHardy | b7047a1 | 2008-03-10 16:44:13 -0700 | [diff] [blame] | 871 | if (cmd != NULL) { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 872 | switch (cmd->command) { |
| 873 | case NFULNL_CFG_CMD_BIND: |
| 874 | if (inst) { |
| 875 | ret = -EBUSY; |
| 876 | goto out_put; |
| 877 | } |
| 878 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 879 | inst = instance_create(net, group_num, |
Eric W. Biederman | 15e4730 | 2012-09-07 20:12:54 +0000 | [diff] [blame] | 880 | NETLINK_CB(skb).portid, |
Patrick McHardy | e32123e | 2013-04-17 06:46:57 +0000 | [diff] [blame] | 881 | sk_user_ns(NETLINK_CB(skb).sk)); |
Patrick McHardy | baab2ce | 2007-12-17 22:41:21 -0800 | [diff] [blame] | 882 | if (IS_ERR(inst)) { |
| 883 | ret = PTR_ERR(inst); |
Michal Miroslaw | f414c16 | 2007-03-23 11:11:31 -0700 | [diff] [blame] | 884 | goto out; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 885 | } |
| 886 | break; |
| 887 | case NFULNL_CFG_CMD_UNBIND: |
| 888 | if (!inst) { |
| 889 | ret = -ENODEV; |
Michal Miroslaw | f414c16 | 2007-03-23 11:11:31 -0700 | [diff] [blame] | 890 | goto out; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 891 | } |
| 892 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 893 | instance_destroy(log, inst); |
Alexey Dobriyan | a49c650 | 2010-02-26 17:48:40 +0100 | [diff] [blame] | 894 | goto out_put; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 895 | default: |
Patrick McHardy | cd21f0a | 2007-12-17 22:40:19 -0800 | [diff] [blame] | 896 | ret = -ENOTSUPP; |
Ken-ichirou MATSUZAWA | eb07595 | 2016-01-05 09:34:34 +0900 | [diff] [blame] | 897 | goto out_put; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 898 | } |
Pablo Neira Ayuso | 336a3b3 | 2015-10-13 12:47:47 +0200 | [diff] [blame] | 899 | } else if (!inst) { |
| 900 | ret = -ENODEV; |
| 901 | goto out; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 902 | } |
| 903 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 904 | if (nfula[NFULA_CFG_MODE]) { |
Pablo Neira Ayuso | 336a3b3 | 2015-10-13 12:47:47 +0200 | [diff] [blame] | 905 | struct nfulnl_msg_config_mode *params = |
| 906 | nla_data(nfula[NFULA_CFG_MODE]); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 907 | |
| 908 | nfulnl_set_mode(inst, params->copy_mode, |
Al Viro | d1208b9 | 2006-11-03 00:58:41 -0800 | [diff] [blame] | 909 | ntohl(params->copy_range)); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 910 | } |
| 911 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 912 | if (nfula[NFULA_CFG_TIMEOUT]) { |
Patrick McHardy | 0dfedd2 | 2007-12-17 22:41:35 -0800 | [diff] [blame] | 913 | __be32 timeout = nla_get_be32(nfula[NFULA_CFG_TIMEOUT]); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 914 | |
| 915 | nfulnl_set_timeout(inst, ntohl(timeout)); |
| 916 | } |
| 917 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 918 | if (nfula[NFULA_CFG_NLBUFSIZ]) { |
Patrick McHardy | 0dfedd2 | 2007-12-17 22:41:35 -0800 | [diff] [blame] | 919 | __be32 nlbufsiz = nla_get_be32(nfula[NFULA_CFG_NLBUFSIZ]); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 920 | |
| 921 | nfulnl_set_nlbufsiz(inst, ntohl(nlbufsiz)); |
| 922 | } |
| 923 | |
Patrick McHardy | df6fb86 | 2007-09-28 14:37:03 -0700 | [diff] [blame] | 924 | if (nfula[NFULA_CFG_QTHRESH]) { |
Patrick McHardy | 0dfedd2 | 2007-12-17 22:41:35 -0800 | [diff] [blame] | 925 | __be32 qthresh = nla_get_be32(nfula[NFULA_CFG_QTHRESH]); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 926 | |
| 927 | nfulnl_set_qthresh(inst, ntohl(qthresh)); |
| 928 | } |
| 929 | |
Pablo Neira | 8cbc870 | 2015-10-13 12:47:48 +0200 | [diff] [blame] | 930 | if (nfula[NFULA_CFG_FLAGS]) |
Ken-ichirou MATSUZAWA | a29a9a5 | 2015-10-05 11:50:46 +0900 | [diff] [blame] | 931 | nfulnl_set_flags(inst, flags); |
Harald Welte | 0af5f6c | 2006-03-20 17:15:11 -0800 | [diff] [blame] | 932 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 933 | out_put: |
| 934 | instance_put(inst); |
Michal Miroslaw | dd16704 | 2007-03-04 15:59:20 -0800 | [diff] [blame] | 935 | out: |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 936 | return ret; |
| 937 | } |
| 938 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 939 | static const struct nfnl_callback nfulnl_cb[NFULNL_MSG_MAX] = { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 940 | [NFULNL_MSG_PACKET] = { .call = nfulnl_recv_unsupp, |
Harald Welte | 37d2e7a | 2005-11-14 15:24:59 -0800 | [diff] [blame] | 941 | .attr_count = NFULA_MAX, }, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 942 | [NFULNL_MSG_CONFIG] = { .call = nfulnl_recv_config, |
Patrick McHardy | fd8281a | 2007-09-28 14:39:09 -0700 | [diff] [blame] | 943 | .attr_count = NFULA_CFG_MAX, |
| 944 | .policy = nfula_cfg_policy }, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 945 | }; |
| 946 | |
Patrick McHardy | 7c8d4cb | 2007-09-28 14:15:45 -0700 | [diff] [blame] | 947 | static const struct nfnetlink_subsystem nfulnl_subsys = { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 948 | .name = "log", |
| 949 | .subsys_id = NFNL_SUBSYS_ULOG, |
| 950 | .cb_count = NFULNL_MSG_MAX, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 951 | .cb = nfulnl_cb, |
| 952 | }; |
| 953 | |
| 954 | #ifdef CONFIG_PROC_FS |
| 955 | struct iter_state { |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 956 | struct seq_net_private p; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 957 | unsigned int bucket; |
| 958 | }; |
| 959 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 960 | 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] | 961 | { |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 962 | struct nfnl_log_net *log; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 963 | if (!st) |
| 964 | return NULL; |
| 965 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 966 | log = nfnl_log_pernet(net); |
| 967 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 968 | for (st->bucket = 0; st->bucket < INSTANCE_BUCKETS; st->bucket++) { |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 969 | struct hlist_head *head = &log->instance_table[st->bucket]; |
| 970 | |
| 971 | if (!hlist_empty(head)) |
| 972 | return rcu_dereference_bh(hlist_first_rcu(head)); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 973 | } |
| 974 | return NULL; |
| 975 | } |
| 976 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 977 | static struct hlist_node *get_next(struct net *net, struct iter_state *st, |
| 978 | struct hlist_node *h) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 979 | { |
Eric Dumazet | 0e60ebe | 2010-11-15 18:17:21 +0100 | [diff] [blame] | 980 | h = rcu_dereference_bh(hlist_next_rcu(h)); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 981 | while (!h) { |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 982 | struct nfnl_log_net *log; |
| 983 | struct hlist_head *head; |
| 984 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 985 | if (++st->bucket >= INSTANCE_BUCKETS) |
| 986 | return NULL; |
| 987 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 988 | log = nfnl_log_pernet(net); |
| 989 | head = &log->instance_table[st->bucket]; |
| 990 | h = rcu_dereference_bh(hlist_first_rcu(head)); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 991 | } |
| 992 | return h; |
| 993 | } |
| 994 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 995 | static struct hlist_node *get_idx(struct net *net, struct iter_state *st, |
| 996 | loff_t pos) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 997 | { |
| 998 | struct hlist_node *head; |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 999 | head = get_first(net, st); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1000 | |
| 1001 | if (head) |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 1002 | while (pos && (head = get_next(net, st, head))) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1003 | pos--; |
| 1004 | return pos ? NULL : head; |
| 1005 | } |
| 1006 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 1007 | static void *seq_start(struct seq_file *s, loff_t *pos) |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 1008 | __acquires(rcu_bh) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1009 | { |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 1010 | rcu_read_lock_bh(); |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 1011 | return get_idx(seq_file_net(s), s->private, *pos); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1012 | } |
| 1013 | |
| 1014 | static void *seq_next(struct seq_file *s, void *v, loff_t *pos) |
| 1015 | { |
| 1016 | (*pos)++; |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 1017 | return get_next(seq_file_net(s), s->private, v); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1018 | } |
| 1019 | |
| 1020 | static void seq_stop(struct seq_file *s, void *v) |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 1021 | __releases(rcu_bh) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1022 | { |
Eric Dumazet | bed1be2 | 2010-06-09 18:14:58 +0200 | [diff] [blame] | 1023 | rcu_read_unlock_bh(); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1024 | } |
| 1025 | |
| 1026 | static int seq_show(struct seq_file *s, void *v) |
| 1027 | { |
| 1028 | const struct nfulnl_instance *inst = v; |
| 1029 | |
Richard Weinberger | 20a1d16 | 2015-04-13 00:52:39 +0200 | [diff] [blame] | 1030 | seq_printf(s, "%5u %6u %5u %1u %5u %6u %2u\n", |
Joe Perches | 1ca9e41 | 2015-03-16 11:25:17 -0700 | [diff] [blame] | 1031 | inst->group_num, |
| 1032 | inst->peer_portid, inst->qlen, |
| 1033 | inst->copy_mode, inst->copy_range, |
| 1034 | inst->flushtimeout, atomic_read(&inst->use)); |
| 1035 | |
| 1036 | return 0; |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1037 | } |
| 1038 | |
Philippe De Muyter | 56b3d97 | 2007-07-10 23:07:31 -0700 | [diff] [blame] | 1039 | static const struct seq_operations nful_seq_ops = { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1040 | .start = seq_start, |
| 1041 | .next = seq_next, |
| 1042 | .stop = seq_stop, |
| 1043 | .show = seq_show, |
| 1044 | }; |
| 1045 | |
| 1046 | static int nful_open(struct inode *inode, struct file *file) |
| 1047 | { |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 1048 | return seq_open_net(inode, file, &nful_seq_ops, |
| 1049 | sizeof(struct iter_state)); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1050 | } |
| 1051 | |
Arjan van de Ven | da7071d | 2007-02-12 00:55:36 -0800 | [diff] [blame] | 1052 | static const struct file_operations nful_file_ops = { |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1053 | .owner = THIS_MODULE, |
| 1054 | .open = nful_open, |
| 1055 | .read = seq_read, |
| 1056 | .llseek = seq_lseek, |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 1057 | .release = seq_release_net, |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1058 | }; |
| 1059 | |
| 1060 | #endif /* PROC_FS */ |
| 1061 | |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 1062 | static int __net_init nfnl_log_net_init(struct net *net) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1063 | { |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 1064 | unsigned int i; |
| 1065 | struct nfnl_log_net *log = nfnl_log_pernet(net); |
Philip Whineray | f13f2ae | 2015-11-22 11:35:07 +0000 | [diff] [blame] | 1066 | #ifdef CONFIG_PROC_FS |
| 1067 | struct proc_dir_entry *proc; |
| 1068 | kuid_t root_uid; |
| 1069 | kgid_t root_gid; |
| 1070 | #endif |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1071 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1072 | for (i = 0; i < INSTANCE_BUCKETS; i++) |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 1073 | INIT_HLIST_HEAD(&log->instance_table[i]); |
| 1074 | spin_lock_init(&log->instances_lock); |
| 1075 | |
| 1076 | #ifdef CONFIG_PROC_FS |
Philip Whineray | f13f2ae | 2015-11-22 11:35:07 +0000 | [diff] [blame] | 1077 | proc = proc_create("nfnetlink_log", 0440, |
| 1078 | net->nf.proc_netfilter, &nful_file_ops); |
| 1079 | if (!proc) |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 1080 | return -ENOMEM; |
Philip Whineray | f13f2ae | 2015-11-22 11:35:07 +0000 | [diff] [blame] | 1081 | |
| 1082 | root_uid = make_kuid(net->user_ns, 0); |
| 1083 | root_gid = make_kgid(net->user_ns, 0); |
| 1084 | if (uid_valid(root_uid) && gid_valid(root_gid)) |
| 1085 | proc_set_user(proc, root_uid, root_gid); |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 1086 | #endif |
| 1087 | return 0; |
| 1088 | } |
| 1089 | |
| 1090 | static void __net_exit nfnl_log_net_exit(struct net *net) |
| 1091 | { |
Pablo Neira Ayuso | e778f56 | 2013-04-30 08:01:18 +0000 | [diff] [blame] | 1092 | #ifdef CONFIG_PROC_FS |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 1093 | remove_proc_entry("nfnetlink_log", net->nf.proc_netfilter); |
Pablo Neira Ayuso | e778f56 | 2013-04-30 08:01:18 +0000 | [diff] [blame] | 1094 | #endif |
Gao feng | 45c2aff | 2013-12-16 14:59:22 +0800 | [diff] [blame] | 1095 | nf_log_unset(net, &nfulnl_logger); |
Gao feng | 9368a53 | 2013-03-24 23:50:45 +0000 | [diff] [blame] | 1096 | } |
| 1097 | |
| 1098 | static struct pernet_operations nfnl_log_net_ops = { |
| 1099 | .init = nfnl_log_net_init, |
| 1100 | .exit = nfnl_log_net_exit, |
| 1101 | .id = &nfnl_log_net_id, |
| 1102 | .size = sizeof(struct nfnl_log_net), |
| 1103 | }; |
| 1104 | |
| 1105 | static int __init nfnetlink_log_init(void) |
| 1106 | { |
Francesco Ruggeri | 3bfe049 | 2015-05-17 14:30:31 -0700 | [diff] [blame] | 1107 | int status; |
| 1108 | |
| 1109 | status = register_pernet_subsys(&nfnl_log_net_ops); |
| 1110 | if (status < 0) { |
| 1111 | pr_err("failed to register pernet ops\n"); |
| 1112 | goto out; |
| 1113 | } |
YOSHIFUJI Hideaki | 601e68e | 2007-02-12 11:15:49 -0800 | [diff] [blame] | 1114 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1115 | netlink_register_notifier(&nfulnl_rtnl_notifier); |
| 1116 | status = nfnetlink_subsys_register(&nfulnl_subsys); |
| 1117 | if (status < 0) { |
Marcelo Leitner | beacd3e | 2014-11-06 12:32:30 +0100 | [diff] [blame] | 1118 | pr_err("failed to create netlink socket\n"); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1119 | goto cleanup_netlink_notifier; |
| 1120 | } |
| 1121 | |
Eric Leblond | ca735b3 | 2009-03-16 14:54:21 +0100 | [diff] [blame] | 1122 | status = nf_log_register(NFPROTO_UNSPEC, &nfulnl_logger); |
| 1123 | if (status < 0) { |
Marcelo Leitner | beacd3e | 2014-11-06 12:32:30 +0100 | [diff] [blame] | 1124 | pr_err("failed to register logger\n"); |
Eric Leblond | ca735b3 | 2009-03-16 14:54:21 +0100 | [diff] [blame] | 1125 | goto cleanup_subsys; |
| 1126 | } |
| 1127 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1128 | return status; |
| 1129 | |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1130 | cleanup_subsys: |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1131 | nfnetlink_subsys_unregister(&nfulnl_subsys); |
| 1132 | cleanup_netlink_notifier: |
| 1133 | netlink_unregister_notifier(&nfulnl_rtnl_notifier); |
Francesco Ruggeri | 3bfe049 | 2015-05-17 14:30:31 -0700 | [diff] [blame] | 1134 | unregister_pernet_subsys(&nfnl_log_net_ops); |
| 1135 | out: |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1136 | return status; |
| 1137 | } |
| 1138 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 1139 | static void __exit nfnetlink_log_fini(void) |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1140 | { |
Patrick McHardy | e92ad99 | 2007-02-12 11:11:55 -0800 | [diff] [blame] | 1141 | nf_log_unregister(&nfulnl_logger); |
Patrick McHardy | 32292a7 | 2006-04-06 14:11:30 -0700 | [diff] [blame] | 1142 | nfnetlink_subsys_unregister(&nfulnl_subsys); |
| 1143 | netlink_unregister_notifier(&nfulnl_rtnl_notifier); |
Francesco Ruggeri | 3bfe049 | 2015-05-17 14:30:31 -0700 | [diff] [blame] | 1144 | unregister_pernet_subsys(&nfnl_log_net_ops); |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1145 | } |
| 1146 | |
| 1147 | MODULE_DESCRIPTION("netfilter userspace logging"); |
| 1148 | MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>"); |
| 1149 | MODULE_LICENSE("GPL"); |
Harald Welte | f682fae | 2005-08-09 20:20:34 -0700 | [diff] [blame] | 1150 | MODULE_ALIAS_NFNL_SUBSYS(NFNL_SUBSYS_ULOG); |
Pablo Neira Ayuso | fab4085 | 2014-06-18 19:38:25 +0200 | [diff] [blame] | 1151 | MODULE_ALIAS_NF_LOGGER(AF_INET, 1); |
| 1152 | MODULE_ALIAS_NF_LOGGER(AF_INET6, 1); |
| 1153 | MODULE_ALIAS_NF_LOGGER(AF_BRIDGE, 1); |
Liping Zhang | 2497b84 | 2016-08-13 22:46:04 +0800 | [diff] [blame] | 1154 | MODULE_ALIAS_NF_LOGGER(3, 1); /* NFPROTO_ARP */ |
Harald Welte | 0597f26 | 2005-08-09 19:58:39 -0700 | [diff] [blame] | 1155 | |
Andrew Morton | 65b4b4e | 2006-03-28 16:37:06 -0800 | [diff] [blame] | 1156 | module_init(nfnetlink_log_init); |
| 1157 | module_exit(nfnetlink_log_fini); |