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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Jiri Pirko0c6965d2014-11-05 20:51:51 +01002 * net/sched/act_police.c Input police filter
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
8 *
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
10 * J Hadi Salim (action changes)
11 */
12
Linus Torvalds1da177e2005-04-16 15:20:36 -070013#include <linux/module.h>
14#include <linux/types.h>
15#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#include <linux/string.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#include <linux/errno.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include <linux/skbuff.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#include <linux/rtnetlink.h>
20#include <linux/init.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090021#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <net/act_api.h>
Arnaldo Carvalho de Melodc5fc572007-03-25 23:06:12 -070023#include <net/netlink.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024
Jiri Pirko0e243212013-02-12 00:12:06 +000025struct tcf_police {
WANG Congec0595c2016-07-25 16:09:42 -070026 struct tc_action common;
Jiri Pirko0e243212013-02-12 00:12:06 +000027 int tcfp_result;
28 u32 tcfp_ewma_rate;
Jiri Pirkoc6d14ff2013-02-12 00:12:07 +000029 s64 tcfp_burst;
Jiri Pirko0e243212013-02-12 00:12:06 +000030 u32 tcfp_mtu;
Jiri Pirkoc6d14ff2013-02-12 00:12:07 +000031 s64 tcfp_toks;
32 s64 tcfp_ptoks;
33 s64 tcfp_mtu_ptoks;
34 s64 tcfp_t_c;
35 struct psched_ratecfg rate;
36 bool rate_present;
37 struct psched_ratecfg peak;
38 bool peak_present;
Jiri Pirko0e243212013-02-12 00:12:06 +000039};
WANG Conga85a9702016-07-25 16:09:41 -070040
41#define to_police(pc) ((struct tcf_police *)pc)
Jiri Pirko0e243212013-02-12 00:12:06 +000042
David S. Millere9ce1cd2006-08-21 23:54:55 -070043#define POL_TAB_MASK 15
David S. Millere9ce1cd2006-08-21 23:54:55 -070044
Patrick McHardy1e9b3d52006-11-30 19:54:05 -080045/* old policer structure from before tc actions */
Eric Dumazetcc7ec452011-01-19 19:26:56 +000046struct tc_police_compat {
Patrick McHardy1e9b3d52006-11-30 19:54:05 -080047 u32 index;
48 int action;
49 u32 limit;
50 u32 burst;
51 u32 mtu;
52 struct tc_ratespec rate;
53 struct tc_ratespec peakrate;
54};
55
Linus Torvalds1da177e2005-04-16 15:20:36 -070056/* Each policer is serialized by its individual spinlock */
57
WANG Congddf97cc2016-02-22 15:57:53 -080058static int police_net_id;
WANG Conga85a9702016-07-25 16:09:41 -070059static struct tc_action_ops act_police_ops;
WANG Congddf97cc2016-02-22 15:57:53 -080060
61static int tcf_act_police_walker(struct net *net, struct sk_buff *skb,
62 struct netlink_callback *cb, int type,
WANG Conga85a9702016-07-25 16:09:41 -070063 const struct tc_action_ops *ops)
Linus Torvalds1da177e2005-04-16 15:20:36 -070064{
WANG Congddf97cc2016-02-22 15:57:53 -080065 struct tc_action_net *tn = net_generic(net, police_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -070066
Roman Mashakb5ac8512016-08-13 22:35:02 -070067 return tcf_generic_walker(tn, skb, cb, type, ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -070068}
Linus Torvalds1da177e2005-04-16 15:20:36 -070069
Patrick McHardy53b2bf32008-01-23 20:36:30 -080070static const struct nla_policy police_policy[TCA_POLICE_MAX + 1] = {
71 [TCA_POLICE_RATE] = { .len = TC_RTAB_SIZE },
72 [TCA_POLICE_PEAKRATE] = { .len = TC_RTAB_SIZE },
73 [TCA_POLICE_AVRATE] = { .type = NLA_U32 },
74 [TCA_POLICE_RESULT] = { .type = NLA_U32 },
75};
76
WANG Congd9fa17e2016-06-13 10:47:44 -070077static int tcf_act_police_init(struct net *net, struct nlattr *nla,
WANG Conga85a9702016-07-25 16:09:41 -070078 struct nlattr *est, struct tc_action **a,
WANG Congd9fa17e2016-06-13 10:47:44 -070079 int ovr, int bind)
Linus Torvalds1da177e2005-04-16 15:20:36 -070080{
Linus Torvalds1da177e2005-04-16 15:20:36 -070081 int ret = 0, err;
Patrick McHardy7ba699c2008-01-22 22:11:50 -080082 struct nlattr *tb[TCA_POLICE_MAX + 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 struct tc_police *parm;
David S. Millere9ce1cd2006-08-21 23:54:55 -070084 struct tcf_police *police;
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 struct qdisc_rate_table *R_tab = NULL, *P_tab = NULL;
WANG Congddf97cc2016-02-22 15:57:53 -080086 struct tc_action_net *tn = net_generic(net, police_net_id);
WANG Cong0852e452016-08-13 22:35:01 -070087 bool exists = false;
Patrick McHardy1e9b3d52006-11-30 19:54:05 -080088 int size;
Linus Torvalds1da177e2005-04-16 15:20:36 -070089
Patrick McHardycee63722008-01-23 20:33:32 -080090 if (nla == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 return -EINVAL;
92
Patrick McHardy53b2bf32008-01-23 20:36:30 -080093 err = nla_parse_nested(tb, TCA_POLICE_MAX, nla, police_policy);
Patrick McHardycee63722008-01-23 20:33:32 -080094 if (err < 0)
95 return err;
96
Patrick McHardy7ba699c2008-01-22 22:11:50 -080097 if (tb[TCA_POLICE_TBF] == NULL)
Patrick McHardy1e9b3d52006-11-30 19:54:05 -080098 return -EINVAL;
Patrick McHardy7ba699c2008-01-22 22:11:50 -080099 size = nla_len(tb[TCA_POLICE_TBF]);
Patrick McHardy1e9b3d52006-11-30 19:54:05 -0800100 if (size != sizeof(*parm) && size != sizeof(struct tc_police_compat))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102
WANG Cong0852e452016-08-13 22:35:01 -0700103 parm = nla_data(tb[TCA_POLICE_TBF]);
104 exists = tcf_hash_check(tn, parm->index, a, bind);
105 if (exists && bind)
106 return 0;
107
108 if (!exists) {
WANG Conga03e6fe2016-06-06 09:54:30 -0700109 ret = tcf_hash_create(tn, parm->index, NULL, a,
WANG Conga85a9702016-07-25 16:09:41 -0700110 &act_police_ops, bind, false);
WANG Conga03e6fe2016-06-06 09:54:30 -0700111 if (ret)
112 return ret;
113 ret = ACT_P_CREATED;
WANG Cong0852e452016-08-13 22:35:01 -0700114 } else {
115 tcf_hash_release(*a, bind);
116 if (!ovr)
117 return -EEXIST;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 }
119
WANG Conga85a9702016-07-25 16:09:41 -0700120 police = to_police(*a);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121 if (parm->rate.rate) {
122 err = -ENOMEM;
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800123 R_tab = qdisc_get_rtab(&parm->rate, tb[TCA_POLICE_RATE]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 if (R_tab == NULL)
125 goto failure;
Stephen Hemmingerc1b56872008-11-25 21:14:06 -0800126
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 if (parm->peakrate.rate) {
128 P_tab = qdisc_get_rtab(&parm->peakrate,
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800129 tb[TCA_POLICE_PEAKRATE]);
Stephen Hemminger71bcb092008-11-25 21:13:31 -0800130 if (P_tab == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 goto failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 }
133 }
Stephen Hemminger71bcb092008-11-25 21:13:31 -0800134
David S. Millere9ce1cd2006-08-21 23:54:55 -0700135 spin_lock_bh(&police->tcf_lock);
Stephen Hemminger71bcb092008-11-25 21:13:31 -0800136 if (est) {
John Fastabend22e0f8b2014-09-28 11:52:56 -0700137 err = gen_replace_estimator(&police->tcf_bstats, NULL,
Stephen Hemminger71bcb092008-11-25 21:13:31 -0800138 &police->tcf_rate_est,
Eric Dumazetedb09eb2016-06-06 09:37:16 -0700139 &police->tcf_lock,
140 NULL, est);
Stephen Hemminger71bcb092008-11-25 21:13:31 -0800141 if (err)
142 goto failure_unlock;
Jarek Poplawskia883bf52009-03-04 17:38:10 -0800143 } else if (tb[TCA_POLICE_AVRATE] &&
144 (ret == ACT_P_CREATED ||
145 !gen_estimator_active(&police->tcf_bstats,
146 &police->tcf_rate_est))) {
147 err = -EINVAL;
148 goto failure_unlock;
Stephen Hemminger71bcb092008-11-25 21:13:31 -0800149 }
150
151 /* No failure allowed after this point */
Jiri Pirkoc6d14ff2013-02-12 00:12:07 +0000152 police->tcfp_mtu = parm->mtu;
153 if (police->tcfp_mtu == 0) {
154 police->tcfp_mtu = ~0;
155 if (R_tab)
156 police->tcfp_mtu = 255 << R_tab->rate.cell_log;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 }
Jiri Pirkoc6d14ff2013-02-12 00:12:07 +0000158 if (R_tab) {
159 police->rate_present = true;
Eric Dumazet3e1e3aa2013-09-19 09:10:03 -0700160 psched_ratecfg_precompute(&police->rate, &R_tab->rate, 0);
Jiri Pirkoc6d14ff2013-02-12 00:12:07 +0000161 qdisc_put_rtab(R_tab);
162 } else {
163 police->rate_present = false;
164 }
165 if (P_tab) {
166 police->peak_present = true;
Eric Dumazet3e1e3aa2013-09-19 09:10:03 -0700167 psched_ratecfg_precompute(&police->peak, &P_tab->rate, 0);
Jiri Pirkoc6d14ff2013-02-12 00:12:07 +0000168 qdisc_put_rtab(P_tab);
169 } else {
170 police->peak_present = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 }
172
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800173 if (tb[TCA_POLICE_RESULT])
Patrick McHardy1587bac2008-01-23 20:35:03 -0800174 police->tcfp_result = nla_get_u32(tb[TCA_POLICE_RESULT]);
Jiri Pirkoc6d14ff2013-02-12 00:12:07 +0000175 police->tcfp_burst = PSCHED_TICKS2NS(parm->burst);
176 police->tcfp_toks = police->tcfp_burst;
177 if (police->peak_present) {
178 police->tcfp_mtu_ptoks = (s64) psched_l2t_ns(&police->peak,
179 police->tcfp_mtu);
180 police->tcfp_ptoks = police->tcfp_mtu_ptoks;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 }
David S. Millere9ce1cd2006-08-21 23:54:55 -0700182 police->tcf_action = parm->action;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800184 if (tb[TCA_POLICE_AVRATE])
Patrick McHardy1587bac2008-01-23 20:35:03 -0800185 police->tcfp_ewma_rate = nla_get_u32(tb[TCA_POLICE_AVRATE]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186
David S. Millere9ce1cd2006-08-21 23:54:55 -0700187 spin_unlock_bh(&police->tcf_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188 if (ret != ACT_P_CREATED)
189 return ret;
190
Eric Dumazetd2de8752014-08-22 18:32:09 -0700191 police->tcfp_t_c = ktime_get_ns();
WANG Conga85a9702016-07-25 16:09:41 -0700192 tcf_hash_insert(tn, *a);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 return ret;
195
Stephen Hemminger71bcb092008-11-25 21:13:31 -0800196failure_unlock:
197 spin_unlock_bh(&police->tcf_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198failure:
Yang Yingliang3b69a4c2013-12-17 15:29:16 +0800199 qdisc_put_rtab(P_tab);
200 qdisc_put_rtab(R_tab);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 if (ret == ACT_P_CREATED)
WANG Conga85a9702016-07-25 16:09:41 -0700202 tcf_hash_cleanup(*a, est);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 return err;
204}
205
Eric Dumazetdc7f9f62011-07-05 23:25:42 +0000206static int tcf_act_police(struct sk_buff *skb, const struct tc_action *a,
YOSHIFUJI Hideaki10297b92007-02-09 23:25:16 +0900207 struct tcf_result *res)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208{
WANG Conga85a9702016-07-25 16:09:41 -0700209 struct tcf_police *police = to_police(a);
Jiri Pirkoc6d14ff2013-02-12 00:12:07 +0000210 s64 now;
211 s64 toks;
212 s64 ptoks = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213
David S. Millere9ce1cd2006-08-21 23:54:55 -0700214 spin_lock(&police->tcf_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215
Eric Dumazetbfe0d022011-01-09 08:30:54 +0000216 bstats_update(&police->tcf_bstats, skb);
Jamal Hadi Salim3d3ed182016-05-23 21:07:20 -0400217 tcf_lastuse_update(&police->tcf_tm);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218
David S. Millere9ce1cd2006-08-21 23:54:55 -0700219 if (police->tcfp_ewma_rate &&
220 police->tcf_rate_est.bps >= police->tcfp_ewma_rate) {
221 police->tcf_qstats.overlimits++;
Jarek Poplawskib9647582009-06-16 08:33:55 +0000222 if (police->tcf_action == TC_ACT_SHOT)
223 police->tcf_qstats.drops++;
David S. Millere9ce1cd2006-08-21 23:54:55 -0700224 spin_unlock(&police->tcf_lock);
225 return police->tcf_action;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227
Jussi Kivilinna0abf77e2008-07-20 00:08:27 -0700228 if (qdisc_pkt_len(skb) <= police->tcfp_mtu) {
Jiri Pirkoc6d14ff2013-02-12 00:12:07 +0000229 if (!police->rate_present) {
David S. Millere9ce1cd2006-08-21 23:54:55 -0700230 spin_unlock(&police->tcf_lock);
231 return police->tcfp_result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 }
233
Eric Dumazetd2de8752014-08-22 18:32:09 -0700234 now = ktime_get_ns();
Jiri Pirkoc6d14ff2013-02-12 00:12:07 +0000235 toks = min_t(s64, now - police->tcfp_t_c,
236 police->tcfp_burst);
237 if (police->peak_present) {
David S. Millere9ce1cd2006-08-21 23:54:55 -0700238 ptoks = toks + police->tcfp_ptoks;
Jiri Pirkoc6d14ff2013-02-12 00:12:07 +0000239 if (ptoks > police->tcfp_mtu_ptoks)
240 ptoks = police->tcfp_mtu_ptoks;
241 ptoks -= (s64) psched_l2t_ns(&police->peak,
242 qdisc_pkt_len(skb));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 }
David S. Millere9ce1cd2006-08-21 23:54:55 -0700244 toks += police->tcfp_toks;
Jiri Pirkoc6d14ff2013-02-12 00:12:07 +0000245 if (toks > police->tcfp_burst)
David S. Millere9ce1cd2006-08-21 23:54:55 -0700246 toks = police->tcfp_burst;
Jiri Pirkoc6d14ff2013-02-12 00:12:07 +0000247 toks -= (s64) psched_l2t_ns(&police->rate, qdisc_pkt_len(skb));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 if ((toks|ptoks) >= 0) {
David S. Millere9ce1cd2006-08-21 23:54:55 -0700249 police->tcfp_t_c = now;
250 police->tcfp_toks = toks;
251 police->tcfp_ptoks = ptoks;
252 spin_unlock(&police->tcf_lock);
253 return police->tcfp_result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 }
255 }
256
David S. Millere9ce1cd2006-08-21 23:54:55 -0700257 police->tcf_qstats.overlimits++;
Jarek Poplawskib9647582009-06-16 08:33:55 +0000258 if (police->tcf_action == TC_ACT_SHOT)
259 police->tcf_qstats.drops++;
David S. Millere9ce1cd2006-08-21 23:54:55 -0700260 spin_unlock(&police->tcf_lock);
261 return police->tcf_action;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262}
263
264static int
265tcf_act_police_dump(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
266{
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700267 unsigned char *b = skb_tail_pointer(skb);
WANG Conga85a9702016-07-25 16:09:41 -0700268 struct tcf_police *police = to_police(a);
Jeff Mahoney0f04cfd2010-08-31 13:21:42 +0000269 struct tc_police opt = {
270 .index = police->tcf_index,
271 .action = police->tcf_action,
272 .mtu = police->tcfp_mtu,
Jiri Pirkoc6d14ff2013-02-12 00:12:07 +0000273 .burst = PSCHED_NS2TICKS(police->tcfp_burst),
Jeff Mahoney0f04cfd2010-08-31 13:21:42 +0000274 .refcnt = police->tcf_refcnt - ref,
275 .bindcnt = police->tcf_bindcnt - bind,
276 };
Jamal Hadi Salim3d3ed182016-05-23 21:07:20 -0400277 struct tcf_t t;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278
Jiri Pirkoc6d14ff2013-02-12 00:12:07 +0000279 if (police->rate_present)
Eric Dumazet01cb71d2013-06-02 13:55:05 +0000280 psched_ratecfg_getrate(&opt.rate, &police->rate);
Jiri Pirkoc6d14ff2013-02-12 00:12:07 +0000281 if (police->peak_present)
Eric Dumazet01cb71d2013-06-02 13:55:05 +0000282 psched_ratecfg_getrate(&opt.peakrate, &police->peak);
David S. Miller1b34ec42012-03-29 05:11:39 -0400283 if (nla_put(skb, TCA_POLICE_TBF, sizeof(opt), &opt))
284 goto nla_put_failure;
285 if (police->tcfp_result &&
286 nla_put_u32(skb, TCA_POLICE_RESULT, police->tcfp_result))
287 goto nla_put_failure;
288 if (police->tcfp_ewma_rate &&
289 nla_put_u32(skb, TCA_POLICE_AVRATE, police->tcfp_ewma_rate))
290 goto nla_put_failure;
Jamal Hadi Salim3d3ed182016-05-23 21:07:20 -0400291
292 t.install = jiffies_to_clock_t(jiffies - police->tcf_tm.install);
293 t.lastuse = jiffies_to_clock_t(jiffies - police->tcf_tm.lastuse);
Jamal Hadi Salim53eb4402016-06-06 06:32:54 -0400294 t.firstuse = jiffies_to_clock_t(jiffies - police->tcf_tm.firstuse);
Jamal Hadi Salim3d3ed182016-05-23 21:07:20 -0400295 t.expires = jiffies_to_clock_t(police->tcf_tm.expires);
296 if (nla_put_64bit(skb, TCA_POLICE_TM, sizeof(t), &t, TCA_POLICE_PAD))
297 goto nla_put_failure;
298
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 return skb->len;
300
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800301nla_put_failure:
Arnaldo Carvalho de Melodc5fc572007-03-25 23:06:12 -0700302 nlmsg_trim(skb, b);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 return -1;
304}
305
WANG Conga85a9702016-07-25 16:09:41 -0700306static int tcf_police_search(struct net *net, struct tc_action **a, u32 index)
WANG Congddf97cc2016-02-22 15:57:53 -0800307{
308 struct tc_action_net *tn = net_generic(net, police_net_id);
309
310 return tcf_hash_search(tn, a, index);
311}
312
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313MODULE_AUTHOR("Alexey Kuznetsov");
314MODULE_DESCRIPTION("Policing actions");
315MODULE_LICENSE("GPL");
316
317static struct tc_action_ops act_police_ops = {
318 .kind = "police",
319 .type = TCA_ID_POLICE,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 .owner = THIS_MODULE,
321 .act = tcf_act_police,
322 .dump = tcf_act_police_dump,
WANG Congd9fa17e2016-06-13 10:47:44 -0700323 .init = tcf_act_police_init,
WANG Congddf97cc2016-02-22 15:57:53 -0800324 .walk = tcf_act_police_walker,
325 .lookup = tcf_police_search,
WANG Conga85a9702016-07-25 16:09:41 -0700326 .size = sizeof(struct tcf_police),
WANG Congddf97cc2016-02-22 15:57:53 -0800327};
328
329static __net_init int police_init_net(struct net *net)
330{
331 struct tc_action_net *tn = net_generic(net, police_net_id);
332
333 return tc_action_net_init(tn, &act_police_ops, POL_TAB_MASK);
334}
335
336static void __net_exit police_exit_net(struct net *net)
337{
338 struct tc_action_net *tn = net_generic(net, police_net_id);
339
340 tc_action_net_exit(tn);
341}
342
343static struct pernet_operations police_net_ops = {
344 .init = police_init_net,
345 .exit = police_exit_net,
346 .id = &police_net_id,
347 .size = sizeof(struct tc_action_net),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348};
349
350static int __init
351police_init_module(void)
352{
WANG Congddf97cc2016-02-22 15:57:53 -0800353 return tcf_register_action(&act_police_ops, &police_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354}
355
356static void __exit
357police_cleanup_module(void)
358{
WANG Congddf97cc2016-02-22 15:57:53 -0800359 tcf_unregister_action(&act_police_ops, &police_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360}
361
362module_init(police_init_module);
363module_exit(police_cleanup_module);