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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * net/sched/police.c Input police filter.
3 *
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
Eric Dumazetcc7ec452011-01-19 19:26:56 +000025#define L2T(p, L) qdisc_l2t((p)->tcfp_R_tab, L)
26#define L2T_P(p, L) qdisc_l2t((p)->tcfp_P_tab, L)
Linus Torvalds1da177e2005-04-16 15:20:36 -070027
David S. Millere9ce1cd2006-08-21 23:54:55 -070028#define POL_TAB_MASK 15
29static struct tcf_common *tcf_police_ht[POL_TAB_MASK + 1];
30static u32 police_idx_gen;
Linus Torvalds1da177e2005-04-16 15:20:36 -070031static DEFINE_RWLOCK(police_lock);
32
David S. Millere9ce1cd2006-08-21 23:54:55 -070033static struct tcf_hashinfo police_hash_info = {
34 .htab = tcf_police_ht,
35 .hmask = POL_TAB_MASK,
36 .lock = &police_lock,
37};
38
Patrick McHardy1e9b3d52006-11-30 19:54:05 -080039/* old policer structure from before tc actions */
Eric Dumazetcc7ec452011-01-19 19:26:56 +000040struct tc_police_compat {
Patrick McHardy1e9b3d52006-11-30 19:54:05 -080041 u32 index;
42 int action;
43 u32 limit;
44 u32 burst;
45 u32 mtu;
46 struct tc_ratespec rate;
47 struct tc_ratespec peakrate;
48};
49
Linus Torvalds1da177e2005-04-16 15:20:36 -070050/* Each policer is serialized by its individual spinlock */
51
Jamal Hadi Salim83b950c2006-04-06 22:24:22 -070052static int tcf_act_police_walker(struct sk_buff *skb, struct netlink_callback *cb,
YOSHIFUJI Hideaki10297b92007-02-09 23:25:16 +090053 int type, struct tc_action *a)
Linus Torvalds1da177e2005-04-16 15:20:36 -070054{
David S. Millere9ce1cd2006-08-21 23:54:55 -070055 struct tcf_common *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -070056 int err = 0, index = -1, i = 0, s_i = 0, n_i = 0;
Patrick McHardy4b3550ef2008-01-23 20:34:11 -080057 struct nlattr *nest;
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
Jamal Hadi Salime1e992e2007-09-12 16:32:59 +020059 read_lock_bh(&police_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -070060
61 s_i = cb->args[0];
62
David S. Millere9ce1cd2006-08-21 23:54:55 -070063 for (i = 0; i < (POL_TAB_MASK + 1); i++) {
64 p = tcf_police_ht[tcf_hash(i, POL_TAB_MASK)];
Linus Torvalds1da177e2005-04-16 15:20:36 -070065
David S. Millere9ce1cd2006-08-21 23:54:55 -070066 for (; p; p = p->tcfc_next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070067 index++;
68 if (index < s_i)
69 continue;
70 a->priv = p;
71 a->order = index;
Patrick McHardy4b3550ef2008-01-23 20:34:11 -080072 nest = nla_nest_start(skb, a->order);
73 if (nest == NULL)
74 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -070075 if (type == RTM_DELACTION)
76 err = tcf_action_dump_1(skb, a, 0, 1);
77 else
78 err = tcf_action_dump_1(skb, a, 0, 0);
79 if (err < 0) {
80 index--;
Patrick McHardy4b3550ef2008-01-23 20:34:11 -080081 nla_nest_cancel(skb, nest);
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 goto done;
83 }
Patrick McHardy4b3550ef2008-01-23 20:34:11 -080084 nla_nest_end(skb, nest);
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 n_i++;
86 }
87 }
88done:
Jamal Hadi Salime1e992e2007-09-12 16:32:59 +020089 read_unlock_bh(&police_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 if (n_i)
91 cb->args[0] += n_i;
92 return n_i;
93
Patrick McHardy7ba699c2008-01-22 22:11:50 -080094nla_put_failure:
Patrick McHardy4b3550ef2008-01-23 20:34:11 -080095 nla_nest_cancel(skb, nest);
Linus Torvalds1da177e2005-04-16 15:20:36 -070096 goto done;
97}
Linus Torvalds1da177e2005-04-16 15:20:36 -070098
Patrick McHardyc3bc7cf2007-07-15 00:03:05 -070099static void tcf_police_destroy(struct tcf_police *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100{
David S. Millere9ce1cd2006-08-21 23:54:55 -0700101 unsigned int h = tcf_hash(p->tcf_index, POL_TAB_MASK);
102 struct tcf_common **p1p;
YOSHIFUJI Hideaki10297b92007-02-09 23:25:16 +0900103
David S. Millere9ce1cd2006-08-21 23:54:55 -0700104 for (p1p = &tcf_police_ht[h]; *p1p; p1p = &(*p1p)->tcfc_next) {
105 if (*p1p == &p->common) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 write_lock_bh(&police_lock);
David S. Millere9ce1cd2006-08-21 23:54:55 -0700107 *p1p = p->tcf_next;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 write_unlock_bh(&police_lock);
David S. Millere9ce1cd2006-08-21 23:54:55 -0700109 gen_kill_estimator(&p->tcf_bstats,
110 &p->tcf_rate_est);
David S. Millere9ce1cd2006-08-21 23:54:55 -0700111 if (p->tcfp_R_tab)
112 qdisc_put_rtab(p->tcfp_R_tab);
113 if (p->tcfp_P_tab)
114 qdisc_put_rtab(p->tcfp_P_tab);
Eric Dumazetc7de2cf2010-06-09 02:09:23 +0000115 /*
116 * gen_estimator est_timer() might access p->tcf_lock
117 * or bstats, wait a RCU grace period before freeing p
118 */
Lai Jiangshan5957b1a2011-03-15 17:58:00 +0800119 kfree_rcu(p, tcf_rcu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 return;
121 }
122 }
Ilpo Järvinen547b7922008-07-25 21:43:18 -0700123 WARN_ON(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124}
125
Patrick McHardy53b2bf32008-01-23 20:36:30 -0800126static const struct nla_policy police_policy[TCA_POLICE_MAX + 1] = {
127 [TCA_POLICE_RATE] = { .len = TC_RTAB_SIZE },
128 [TCA_POLICE_PEAKRATE] = { .len = TC_RTAB_SIZE },
129 [TCA_POLICE_AVRATE] = { .type = NLA_U32 },
130 [TCA_POLICE_RESULT] = { .type = NLA_U32 },
131};
132
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800133static int tcf_act_police_locate(struct nlattr *nla, struct nlattr *est,
YOSHIFUJI Hideaki10297b92007-02-09 23:25:16 +0900134 struct tc_action *a, int ovr, int bind)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135{
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000136 unsigned int h;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137 int ret = 0, err;
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800138 struct nlattr *tb[TCA_POLICE_MAX + 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 struct tc_police *parm;
David S. Millere9ce1cd2006-08-21 23:54:55 -0700140 struct tcf_police *police;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 struct qdisc_rate_table *R_tab = NULL, *P_tab = NULL;
Patrick McHardy1e9b3d52006-11-30 19:54:05 -0800142 int size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143
Patrick McHardycee63722008-01-23 20:33:32 -0800144 if (nla == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 return -EINVAL;
146
Patrick McHardy53b2bf32008-01-23 20:36:30 -0800147 err = nla_parse_nested(tb, TCA_POLICE_MAX, nla, police_policy);
Patrick McHardycee63722008-01-23 20:33:32 -0800148 if (err < 0)
149 return err;
150
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800151 if (tb[TCA_POLICE_TBF] == NULL)
Patrick McHardy1e9b3d52006-11-30 19:54:05 -0800152 return -EINVAL;
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800153 size = nla_len(tb[TCA_POLICE_TBF]);
Patrick McHardy1e9b3d52006-11-30 19:54:05 -0800154 if (size != sizeof(*parm) && size != sizeof(struct tc_police_compat))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 return -EINVAL;
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800156 parm = nla_data(tb[TCA_POLICE_TBF]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157
David S. Millere9ce1cd2006-08-21 23:54:55 -0700158 if (parm->index) {
159 struct tcf_common *pc;
160
161 pc = tcf_hash_lookup(parm->index, &police_hash_info);
162 if (pc != NULL) {
163 a->priv = pc;
164 police = to_police(pc);
165 if (bind) {
166 police->tcf_bindcnt += 1;
167 police->tcf_refcnt += 1;
168 }
169 if (ovr)
170 goto override;
171 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 }
174
David S. Millere9ce1cd2006-08-21 23:54:55 -0700175 police = kzalloc(sizeof(*police), GFP_KERNEL);
176 if (police == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 ret = ACT_P_CREATED;
David S. Millere9ce1cd2006-08-21 23:54:55 -0700179 police->tcf_refcnt = 1;
180 spin_lock_init(&police->tcf_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 if (bind)
David S. Millere9ce1cd2006-08-21 23:54:55 -0700182 police->tcf_bindcnt = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183override:
184 if (parm->rate.rate) {
185 err = -ENOMEM;
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800186 R_tab = qdisc_get_rtab(&parm->rate, tb[TCA_POLICE_RATE]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 if (R_tab == NULL)
188 goto failure;
Stephen Hemmingerc1b56872008-11-25 21:14:06 -0800189
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 if (parm->peakrate.rate) {
191 P_tab = qdisc_get_rtab(&parm->peakrate,
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800192 tb[TCA_POLICE_PEAKRATE]);
Stephen Hemminger71bcb092008-11-25 21:13:31 -0800193 if (P_tab == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 goto failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195 }
196 }
Stephen Hemminger71bcb092008-11-25 21:13:31 -0800197
David S. Millere9ce1cd2006-08-21 23:54:55 -0700198 spin_lock_bh(&police->tcf_lock);
Stephen Hemminger71bcb092008-11-25 21:13:31 -0800199 if (est) {
200 err = gen_replace_estimator(&police->tcf_bstats,
201 &police->tcf_rate_est,
202 &police->tcf_lock, est);
203 if (err)
204 goto failure_unlock;
Jarek Poplawskia883bf52009-03-04 17:38:10 -0800205 } else if (tb[TCA_POLICE_AVRATE] &&
206 (ret == ACT_P_CREATED ||
207 !gen_estimator_active(&police->tcf_bstats,
208 &police->tcf_rate_est))) {
209 err = -EINVAL;
210 goto failure_unlock;
Stephen Hemminger71bcb092008-11-25 21:13:31 -0800211 }
212
213 /* No failure allowed after this point */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 if (R_tab != NULL) {
David S. Millere9ce1cd2006-08-21 23:54:55 -0700215 qdisc_put_rtab(police->tcfp_R_tab);
216 police->tcfp_R_tab = R_tab;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 }
218 if (P_tab != NULL) {
David S. Millere9ce1cd2006-08-21 23:54:55 -0700219 qdisc_put_rtab(police->tcfp_P_tab);
220 police->tcfp_P_tab = P_tab;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 }
222
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800223 if (tb[TCA_POLICE_RESULT])
Patrick McHardy1587bac2008-01-23 20:35:03 -0800224 police->tcfp_result = nla_get_u32(tb[TCA_POLICE_RESULT]);
David S. Millere9ce1cd2006-08-21 23:54:55 -0700225 police->tcfp_toks = police->tcfp_burst = parm->burst;
226 police->tcfp_mtu = parm->mtu;
227 if (police->tcfp_mtu == 0) {
228 police->tcfp_mtu = ~0;
229 if (police->tcfp_R_tab)
230 police->tcfp_mtu = 255<<police->tcfp_R_tab->rate.cell_log;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231 }
David S. Millere9ce1cd2006-08-21 23:54:55 -0700232 if (police->tcfp_P_tab)
233 police->tcfp_ptoks = L2T_P(police, police->tcfp_mtu);
234 police->tcf_action = parm->action;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800236 if (tb[TCA_POLICE_AVRATE])
Patrick McHardy1587bac2008-01-23 20:35:03 -0800237 police->tcfp_ewma_rate = nla_get_u32(tb[TCA_POLICE_AVRATE]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238
David S. Millere9ce1cd2006-08-21 23:54:55 -0700239 spin_unlock_bh(&police->tcf_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 if (ret != ACT_P_CREATED)
241 return ret;
242
Patrick McHardy3bebcda2007-03-23 11:29:25 -0700243 police->tcfp_t_c = psched_get_time();
David S. Millere9ce1cd2006-08-21 23:54:55 -0700244 police->tcf_index = parm->index ? parm->index :
245 tcf_hash_new_index(&police_idx_gen, &police_hash_info);
246 h = tcf_hash(police->tcf_index, POL_TAB_MASK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 write_lock_bh(&police_lock);
David S. Millere9ce1cd2006-08-21 23:54:55 -0700248 police->tcf_next = tcf_police_ht[h];
249 tcf_police_ht[h] = &police->common;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 write_unlock_bh(&police_lock);
251
David S. Millere9ce1cd2006-08-21 23:54:55 -0700252 a->priv = police;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 return ret;
254
Stephen Hemminger71bcb092008-11-25 21:13:31 -0800255failure_unlock:
256 spin_unlock_bh(&police->tcf_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257failure:
Stephen Hemminger71bcb092008-11-25 21:13:31 -0800258 if (P_tab)
259 qdisc_put_rtab(P_tab);
260 if (R_tab)
261 qdisc_put_rtab(R_tab);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 if (ret == ACT_P_CREATED)
David S. Millere9ce1cd2006-08-21 23:54:55 -0700263 kfree(police);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 return err;
265}
266
267static int tcf_act_police_cleanup(struct tc_action *a, int bind)
268{
David S. Millere9ce1cd2006-08-21 23:54:55 -0700269 struct tcf_police *p = a->priv;
Patrick McHardyc3bc7cf2007-07-15 00:03:05 -0700270 int ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271
Patrick McHardyc3bc7cf2007-07-15 00:03:05 -0700272 if (p != NULL) {
273 if (bind)
274 p->tcf_bindcnt--;
275
276 p->tcf_refcnt--;
277 if (p->tcf_refcnt <= 0 && !p->tcf_bindcnt) {
278 tcf_police_destroy(p);
279 ret = 1;
280 }
281 }
282 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283}
284
Eric Dumazetdc7f9f62011-07-05 23:25:42 +0000285static int tcf_act_police(struct sk_buff *skb, const struct tc_action *a,
YOSHIFUJI Hideaki10297b92007-02-09 23:25:16 +0900286 struct tcf_result *res)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287{
David S. Millere9ce1cd2006-08-21 23:54:55 -0700288 struct tcf_police *police = a->priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 psched_time_t now;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 long toks;
291 long ptoks = 0;
292
David S. Millere9ce1cd2006-08-21 23:54:55 -0700293 spin_lock(&police->tcf_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294
Eric Dumazetbfe0d022011-01-09 08:30:54 +0000295 bstats_update(&police->tcf_bstats, skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296
David S. Millere9ce1cd2006-08-21 23:54:55 -0700297 if (police->tcfp_ewma_rate &&
298 police->tcf_rate_est.bps >= police->tcfp_ewma_rate) {
299 police->tcf_qstats.overlimits++;
Jarek Poplawskib9647582009-06-16 08:33:55 +0000300 if (police->tcf_action == TC_ACT_SHOT)
301 police->tcf_qstats.drops++;
David S. Millere9ce1cd2006-08-21 23:54:55 -0700302 spin_unlock(&police->tcf_lock);
303 return police->tcf_action;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305
Jussi Kivilinna0abf77e2008-07-20 00:08:27 -0700306 if (qdisc_pkt_len(skb) <= police->tcfp_mtu) {
David S. Millere9ce1cd2006-08-21 23:54:55 -0700307 if (police->tcfp_R_tab == NULL) {
308 spin_unlock(&police->tcf_lock);
309 return police->tcfp_result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 }
311
Patrick McHardy3bebcda2007-03-23 11:29:25 -0700312 now = psched_get_time();
Patrick McHardy03cc45c2007-03-23 11:29:11 -0700313 toks = psched_tdiff_bounded(now, police->tcfp_t_c,
314 police->tcfp_burst);
David S. Millere9ce1cd2006-08-21 23:54:55 -0700315 if (police->tcfp_P_tab) {
316 ptoks = toks + police->tcfp_ptoks;
317 if (ptoks > (long)L2T_P(police, police->tcfp_mtu))
318 ptoks = (long)L2T_P(police, police->tcfp_mtu);
Jussi Kivilinna0abf77e2008-07-20 00:08:27 -0700319 ptoks -= L2T_P(police, qdisc_pkt_len(skb));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 }
David S. Millere9ce1cd2006-08-21 23:54:55 -0700321 toks += police->tcfp_toks;
322 if (toks > (long)police->tcfp_burst)
323 toks = police->tcfp_burst;
Jussi Kivilinna0abf77e2008-07-20 00:08:27 -0700324 toks -= L2T(police, qdisc_pkt_len(skb));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 if ((toks|ptoks) >= 0) {
David S. Millere9ce1cd2006-08-21 23:54:55 -0700326 police->tcfp_t_c = now;
327 police->tcfp_toks = toks;
328 police->tcfp_ptoks = ptoks;
329 spin_unlock(&police->tcf_lock);
330 return police->tcfp_result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331 }
332 }
333
David S. Millere9ce1cd2006-08-21 23:54:55 -0700334 police->tcf_qstats.overlimits++;
Jarek Poplawskib9647582009-06-16 08:33:55 +0000335 if (police->tcf_action == TC_ACT_SHOT)
336 police->tcf_qstats.drops++;
David S. Millere9ce1cd2006-08-21 23:54:55 -0700337 spin_unlock(&police->tcf_lock);
338 return police->tcf_action;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339}
340
341static int
342tcf_act_police_dump(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
343{
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700344 unsigned char *b = skb_tail_pointer(skb);
David S. Millere9ce1cd2006-08-21 23:54:55 -0700345 struct tcf_police *police = a->priv;
Jeff Mahoney0f04cfd2010-08-31 13:21:42 +0000346 struct tc_police opt = {
347 .index = police->tcf_index,
348 .action = police->tcf_action,
349 .mtu = police->tcfp_mtu,
350 .burst = police->tcfp_burst,
351 .refcnt = police->tcf_refcnt - ref,
352 .bindcnt = police->tcf_bindcnt - bind,
353 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354
David S. Millere9ce1cd2006-08-21 23:54:55 -0700355 if (police->tcfp_R_tab)
356 opt.rate = police->tcfp_R_tab->rate;
David S. Millere9ce1cd2006-08-21 23:54:55 -0700357 if (police->tcfp_P_tab)
358 opt.peakrate = police->tcfp_P_tab->rate;
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800359 NLA_PUT(skb, TCA_POLICE_TBF, sizeof(opt), &opt);
David S. Millere9ce1cd2006-08-21 23:54:55 -0700360 if (police->tcfp_result)
Patrick McHardy24beeab2008-01-23 20:34:48 -0800361 NLA_PUT_U32(skb, TCA_POLICE_RESULT, police->tcfp_result);
David S. Millere9ce1cd2006-08-21 23:54:55 -0700362 if (police->tcfp_ewma_rate)
Patrick McHardy24beeab2008-01-23 20:34:48 -0800363 NLA_PUT_U32(skb, TCA_POLICE_AVRATE, police->tcfp_ewma_rate);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 return skb->len;
365
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800366nla_put_failure:
Arnaldo Carvalho de Melodc5fc572007-03-25 23:06:12 -0700367 nlmsg_trim(skb, b);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 return -1;
369}
370
371MODULE_AUTHOR("Alexey Kuznetsov");
372MODULE_DESCRIPTION("Policing actions");
373MODULE_LICENSE("GPL");
374
375static struct tc_action_ops act_police_ops = {
376 .kind = "police",
David S. Millere9ce1cd2006-08-21 23:54:55 -0700377 .hinfo = &police_hash_info,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 .type = TCA_ID_POLICE,
379 .capab = TCA_CAP_NONE,
380 .owner = THIS_MODULE,
381 .act = tcf_act_police,
382 .dump = tcf_act_police_dump,
383 .cleanup = tcf_act_police_cleanup,
David S. Millere9ce1cd2006-08-21 23:54:55 -0700384 .lookup = tcf_hash_search,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385 .init = tcf_act_police_locate,
Jamal Hadi Salim83b950c2006-04-06 22:24:22 -0700386 .walk = tcf_act_police_walker
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387};
388
389static int __init
390police_init_module(void)
391{
392 return tcf_register_action(&act_police_ops);
393}
394
395static void __exit
396police_cleanup_module(void)
397{
398 tcf_unregister_action(&act_police_ops);
399}
400
401module_init(police_init_module);
402module_exit(police_cleanup_module);