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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
Jesper Dangaard Brouere9bef552007-09-12 16:35:24 +020025#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 */
40struct tc_police_compat
41{
42 u32 index;
43 int action;
44 u32 limit;
45 u32 burst;
46 u32 mtu;
47 struct tc_ratespec rate;
48 struct tc_ratespec peakrate;
49};
50
Linus Torvalds1da177e2005-04-16 15:20:36 -070051/* Each policer is serialized by its individual spinlock */
52
Jamal Hadi Salim83b950c2006-04-06 22:24:22 -070053static int tcf_act_police_walker(struct sk_buff *skb, struct netlink_callback *cb,
YOSHIFUJI Hideaki10297b92007-02-09 23:25:16 +090054 int type, struct tc_action *a)
Linus Torvalds1da177e2005-04-16 15:20:36 -070055{
David S. Millere9ce1cd2006-08-21 23:54:55 -070056 struct tcf_common *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -070057 int err = 0, index = -1, i = 0, s_i = 0, n_i = 0;
Patrick McHardy4b3550ef2008-01-23 20:34:11 -080058 struct nlattr *nest;
Linus Torvalds1da177e2005-04-16 15:20:36 -070059
Jamal Hadi Salime1e992e2007-09-12 16:32:59 +020060 read_lock_bh(&police_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -070061
62 s_i = cb->args[0];
63
David S. Millere9ce1cd2006-08-21 23:54:55 -070064 for (i = 0; i < (POL_TAB_MASK + 1); i++) {
65 p = tcf_police_ht[tcf_hash(i, POL_TAB_MASK)];
Linus Torvalds1da177e2005-04-16 15:20:36 -070066
David S. Millere9ce1cd2006-08-21 23:54:55 -070067 for (; p; p = p->tcfc_next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070068 index++;
69 if (index < s_i)
70 continue;
71 a->priv = p;
72 a->order = index;
Patrick McHardy4b3550ef2008-01-23 20:34:11 -080073 nest = nla_nest_start(skb, a->order);
74 if (nest == NULL)
75 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 if (type == RTM_DELACTION)
77 err = tcf_action_dump_1(skb, a, 0, 1);
78 else
79 err = tcf_action_dump_1(skb, a, 0, 0);
80 if (err < 0) {
81 index--;
Patrick McHardy4b3550ef2008-01-23 20:34:11 -080082 nla_nest_cancel(skb, nest);
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 goto done;
84 }
Patrick McHardy4b3550ef2008-01-23 20:34:11 -080085 nla_nest_end(skb, nest);
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 n_i++;
87 }
88 }
89done:
Jamal Hadi Salime1e992e2007-09-12 16:32:59 +020090 read_unlock_bh(&police_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 if (n_i)
92 cb->args[0] += n_i;
93 return n_i;
94
Patrick McHardy7ba699c2008-01-22 22:11:50 -080095nla_put_failure:
Patrick McHardy4b3550ef2008-01-23 20:34:11 -080096 nla_nest_cancel(skb, nest);
Linus Torvalds1da177e2005-04-16 15:20:36 -070097 goto done;
98}
Linus Torvalds1da177e2005-04-16 15:20:36 -070099
Eric Dumazetc7de2cf2010-06-09 02:09:23 +0000100static void tcf_police_free_rcu(struct rcu_head *head)
101{
102 kfree(container_of(head, struct tcf_police, tcf_rcu));
103}
104
Patrick McHardyc3bc7cf2007-07-15 00:03:05 -0700105static void tcf_police_destroy(struct tcf_police *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106{
David S. Millere9ce1cd2006-08-21 23:54:55 -0700107 unsigned int h = tcf_hash(p->tcf_index, POL_TAB_MASK);
108 struct tcf_common **p1p;
YOSHIFUJI Hideaki10297b92007-02-09 23:25:16 +0900109
David S. Millere9ce1cd2006-08-21 23:54:55 -0700110 for (p1p = &tcf_police_ht[h]; *p1p; p1p = &(*p1p)->tcfc_next) {
111 if (*p1p == &p->common) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112 write_lock_bh(&police_lock);
David S. Millere9ce1cd2006-08-21 23:54:55 -0700113 *p1p = p->tcf_next;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114 write_unlock_bh(&police_lock);
David S. Millere9ce1cd2006-08-21 23:54:55 -0700115 gen_kill_estimator(&p->tcf_bstats,
116 &p->tcf_rate_est);
David S. Millere9ce1cd2006-08-21 23:54:55 -0700117 if (p->tcfp_R_tab)
118 qdisc_put_rtab(p->tcfp_R_tab);
119 if (p->tcfp_P_tab)
120 qdisc_put_rtab(p->tcfp_P_tab);
Eric Dumazetc7de2cf2010-06-09 02:09:23 +0000121 /*
122 * gen_estimator est_timer() might access p->tcf_lock
123 * or bstats, wait a RCU grace period before freeing p
124 */
125 call_rcu(&p->tcf_rcu, tcf_police_free_rcu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126 return;
127 }
128 }
Ilpo Järvinen547b7922008-07-25 21:43:18 -0700129 WARN_ON(1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130}
131
Patrick McHardy53b2bf32008-01-23 20:36:30 -0800132static const struct nla_policy police_policy[TCA_POLICE_MAX + 1] = {
133 [TCA_POLICE_RATE] = { .len = TC_RTAB_SIZE },
134 [TCA_POLICE_PEAKRATE] = { .len = TC_RTAB_SIZE },
135 [TCA_POLICE_AVRATE] = { .type = NLA_U32 },
136 [TCA_POLICE_RESULT] = { .type = NLA_U32 },
137};
138
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800139static int tcf_act_police_locate(struct nlattr *nla, struct nlattr *est,
YOSHIFUJI Hideaki10297b92007-02-09 23:25:16 +0900140 struct tc_action *a, int ovr, int bind)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141{
142 unsigned h;
143 int ret = 0, err;
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800144 struct nlattr *tb[TCA_POLICE_MAX + 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 struct tc_police *parm;
David S. Millere9ce1cd2006-08-21 23:54:55 -0700146 struct tcf_police *police;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147 struct qdisc_rate_table *R_tab = NULL, *P_tab = NULL;
Patrick McHardy1e9b3d52006-11-30 19:54:05 -0800148 int size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149
Patrick McHardycee63722008-01-23 20:33:32 -0800150 if (nla == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 return -EINVAL;
152
Patrick McHardy53b2bf32008-01-23 20:36:30 -0800153 err = nla_parse_nested(tb, TCA_POLICE_MAX, nla, police_policy);
Patrick McHardycee63722008-01-23 20:33:32 -0800154 if (err < 0)
155 return err;
156
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800157 if (tb[TCA_POLICE_TBF] == NULL)
Patrick McHardy1e9b3d52006-11-30 19:54:05 -0800158 return -EINVAL;
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800159 size = nla_len(tb[TCA_POLICE_TBF]);
Patrick McHardy1e9b3d52006-11-30 19:54:05 -0800160 if (size != sizeof(*parm) && size != sizeof(struct tc_police_compat))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 return -EINVAL;
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800162 parm = nla_data(tb[TCA_POLICE_TBF]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163
David S. Millere9ce1cd2006-08-21 23:54:55 -0700164 if (parm->index) {
165 struct tcf_common *pc;
166
167 pc = tcf_hash_lookup(parm->index, &police_hash_info);
168 if (pc != NULL) {
169 a->priv = pc;
170 police = to_police(pc);
171 if (bind) {
172 police->tcf_bindcnt += 1;
173 police->tcf_refcnt += 1;
174 }
175 if (ovr)
176 goto override;
177 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 }
180
David S. Millere9ce1cd2006-08-21 23:54:55 -0700181 police = kzalloc(sizeof(*police), GFP_KERNEL);
182 if (police == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 ret = ACT_P_CREATED;
David S. Millere9ce1cd2006-08-21 23:54:55 -0700185 police->tcf_refcnt = 1;
186 spin_lock_init(&police->tcf_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 if (bind)
David S. Millere9ce1cd2006-08-21 23:54:55 -0700188 police->tcf_bindcnt = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189override:
190 if (parm->rate.rate) {
191 err = -ENOMEM;
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800192 R_tab = qdisc_get_rtab(&parm->rate, tb[TCA_POLICE_RATE]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 if (R_tab == NULL)
194 goto failure;
Stephen Hemmingerc1b56872008-11-25 21:14:06 -0800195
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196 if (parm->peakrate.rate) {
197 P_tab = qdisc_get_rtab(&parm->peakrate,
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800198 tb[TCA_POLICE_PEAKRATE]);
Stephen Hemminger71bcb092008-11-25 21:13:31 -0800199 if (P_tab == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 goto failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 }
202 }
Stephen Hemminger71bcb092008-11-25 21:13:31 -0800203
David S. Millere9ce1cd2006-08-21 23:54:55 -0700204 spin_lock_bh(&police->tcf_lock);
Stephen Hemminger71bcb092008-11-25 21:13:31 -0800205 if (est) {
206 err = gen_replace_estimator(&police->tcf_bstats,
207 &police->tcf_rate_est,
208 &police->tcf_lock, est);
209 if (err)
210 goto failure_unlock;
Jarek Poplawskia883bf52009-03-04 17:38:10 -0800211 } else if (tb[TCA_POLICE_AVRATE] &&
212 (ret == ACT_P_CREATED ||
213 !gen_estimator_active(&police->tcf_bstats,
214 &police->tcf_rate_est))) {
215 err = -EINVAL;
216 goto failure_unlock;
Stephen Hemminger71bcb092008-11-25 21:13:31 -0800217 }
218
219 /* No failure allowed after this point */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220 if (R_tab != NULL) {
David S. Millere9ce1cd2006-08-21 23:54:55 -0700221 qdisc_put_rtab(police->tcfp_R_tab);
222 police->tcfp_R_tab = R_tab;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223 }
224 if (P_tab != NULL) {
David S. Millere9ce1cd2006-08-21 23:54:55 -0700225 qdisc_put_rtab(police->tcfp_P_tab);
226 police->tcfp_P_tab = P_tab;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 }
228
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800229 if (tb[TCA_POLICE_RESULT])
Patrick McHardy1587bac2008-01-23 20:35:03 -0800230 police->tcfp_result = nla_get_u32(tb[TCA_POLICE_RESULT]);
David S. Millere9ce1cd2006-08-21 23:54:55 -0700231 police->tcfp_toks = police->tcfp_burst = parm->burst;
232 police->tcfp_mtu = parm->mtu;
233 if (police->tcfp_mtu == 0) {
234 police->tcfp_mtu = ~0;
235 if (police->tcfp_R_tab)
236 police->tcfp_mtu = 255<<police->tcfp_R_tab->rate.cell_log;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 }
David S. Millere9ce1cd2006-08-21 23:54:55 -0700238 if (police->tcfp_P_tab)
239 police->tcfp_ptoks = L2T_P(police, police->tcfp_mtu);
240 police->tcf_action = parm->action;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800242 if (tb[TCA_POLICE_AVRATE])
Patrick McHardy1587bac2008-01-23 20:35:03 -0800243 police->tcfp_ewma_rate = nla_get_u32(tb[TCA_POLICE_AVRATE]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244
David S. Millere9ce1cd2006-08-21 23:54:55 -0700245 spin_unlock_bh(&police->tcf_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 if (ret != ACT_P_CREATED)
247 return ret;
248
Patrick McHardy3bebcda2007-03-23 11:29:25 -0700249 police->tcfp_t_c = psched_get_time();
David S. Millere9ce1cd2006-08-21 23:54:55 -0700250 police->tcf_index = parm->index ? parm->index :
251 tcf_hash_new_index(&police_idx_gen, &police_hash_info);
252 h = tcf_hash(police->tcf_index, POL_TAB_MASK);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 write_lock_bh(&police_lock);
David S. Millere9ce1cd2006-08-21 23:54:55 -0700254 police->tcf_next = tcf_police_ht[h];
255 tcf_police_ht[h] = &police->common;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 write_unlock_bh(&police_lock);
257
David S. Millere9ce1cd2006-08-21 23:54:55 -0700258 a->priv = police;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 return ret;
260
Stephen Hemminger71bcb092008-11-25 21:13:31 -0800261failure_unlock:
262 spin_unlock_bh(&police->tcf_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263failure:
Stephen Hemminger71bcb092008-11-25 21:13:31 -0800264 if (P_tab)
265 qdisc_put_rtab(P_tab);
266 if (R_tab)
267 qdisc_put_rtab(R_tab);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 if (ret == ACT_P_CREATED)
David S. Millere9ce1cd2006-08-21 23:54:55 -0700269 kfree(police);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 return err;
271}
272
273static int tcf_act_police_cleanup(struct tc_action *a, int bind)
274{
David S. Millere9ce1cd2006-08-21 23:54:55 -0700275 struct tcf_police *p = a->priv;
Patrick McHardyc3bc7cf2007-07-15 00:03:05 -0700276 int ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277
Patrick McHardyc3bc7cf2007-07-15 00:03:05 -0700278 if (p != NULL) {
279 if (bind)
280 p->tcf_bindcnt--;
281
282 p->tcf_refcnt--;
283 if (p->tcf_refcnt <= 0 && !p->tcf_bindcnt) {
284 tcf_police_destroy(p);
285 ret = 1;
286 }
287 }
288 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289}
290
Patrick McHardyf43c5a02006-01-08 22:15:34 -0800291static int tcf_act_police(struct sk_buff *skb, struct tc_action *a,
YOSHIFUJI Hideaki10297b92007-02-09 23:25:16 +0900292 struct tcf_result *res)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293{
David S. Millere9ce1cd2006-08-21 23:54:55 -0700294 struct tcf_police *police = a->priv;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 psched_time_t now;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296 long toks;
297 long ptoks = 0;
298
David S. Millere9ce1cd2006-08-21 23:54:55 -0700299 spin_lock(&police->tcf_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300
Jussi Kivilinna0abf77e2008-07-20 00:08:27 -0700301 police->tcf_bstats.bytes += qdisc_pkt_len(skb);
David S. Millere9ce1cd2006-08-21 23:54:55 -0700302 police->tcf_bstats.packets++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303
David S. Millere9ce1cd2006-08-21 23:54:55 -0700304 if (police->tcfp_ewma_rate &&
305 police->tcf_rate_est.bps >= police->tcfp_ewma_rate) {
306 police->tcf_qstats.overlimits++;
Jarek Poplawskib9647582009-06-16 08:33:55 +0000307 if (police->tcf_action == TC_ACT_SHOT)
308 police->tcf_qstats.drops++;
David S. Millere9ce1cd2006-08-21 23:54:55 -0700309 spin_unlock(&police->tcf_lock);
310 return police->tcf_action;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312
Jussi Kivilinna0abf77e2008-07-20 00:08:27 -0700313 if (qdisc_pkt_len(skb) <= police->tcfp_mtu) {
David S. Millere9ce1cd2006-08-21 23:54:55 -0700314 if (police->tcfp_R_tab == NULL) {
315 spin_unlock(&police->tcf_lock);
316 return police->tcfp_result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 }
318
Patrick McHardy3bebcda2007-03-23 11:29:25 -0700319 now = psched_get_time();
Patrick McHardy03cc45c2007-03-23 11:29:11 -0700320 toks = psched_tdiff_bounded(now, police->tcfp_t_c,
321 police->tcfp_burst);
David S. Millere9ce1cd2006-08-21 23:54:55 -0700322 if (police->tcfp_P_tab) {
323 ptoks = toks + police->tcfp_ptoks;
324 if (ptoks > (long)L2T_P(police, police->tcfp_mtu))
325 ptoks = (long)L2T_P(police, police->tcfp_mtu);
Jussi Kivilinna0abf77e2008-07-20 00:08:27 -0700326 ptoks -= L2T_P(police, qdisc_pkt_len(skb));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 }
David S. Millere9ce1cd2006-08-21 23:54:55 -0700328 toks += police->tcfp_toks;
329 if (toks > (long)police->tcfp_burst)
330 toks = police->tcfp_burst;
Jussi Kivilinna0abf77e2008-07-20 00:08:27 -0700331 toks -= L2T(police, qdisc_pkt_len(skb));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 if ((toks|ptoks) >= 0) {
David S. Millere9ce1cd2006-08-21 23:54:55 -0700333 police->tcfp_t_c = now;
334 police->tcfp_toks = toks;
335 police->tcfp_ptoks = ptoks;
336 spin_unlock(&police->tcf_lock);
337 return police->tcfp_result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 }
339 }
340
David S. Millere9ce1cd2006-08-21 23:54:55 -0700341 police->tcf_qstats.overlimits++;
Jarek Poplawskib9647582009-06-16 08:33:55 +0000342 if (police->tcf_action == TC_ACT_SHOT)
343 police->tcf_qstats.drops++;
David S. Millere9ce1cd2006-08-21 23:54:55 -0700344 spin_unlock(&police->tcf_lock);
345 return police->tcf_action;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346}
347
348static int
349tcf_act_police_dump(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
350{
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700351 unsigned char *b = skb_tail_pointer(skb);
David S. Millere9ce1cd2006-08-21 23:54:55 -0700352 struct tcf_police *police = a->priv;
Jeff Mahoney0f04cfd2010-08-31 13:21:42 +0000353 struct tc_police opt = {
354 .index = police->tcf_index,
355 .action = police->tcf_action,
356 .mtu = police->tcfp_mtu,
357 .burst = police->tcfp_burst,
358 .refcnt = police->tcf_refcnt - ref,
359 .bindcnt = police->tcf_bindcnt - bind,
360 };
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361
David S. Millere9ce1cd2006-08-21 23:54:55 -0700362 if (police->tcfp_R_tab)
363 opt.rate = police->tcfp_R_tab->rate;
David S. Millere9ce1cd2006-08-21 23:54:55 -0700364 if (police->tcfp_P_tab)
365 opt.peakrate = police->tcfp_P_tab->rate;
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800366 NLA_PUT(skb, TCA_POLICE_TBF, sizeof(opt), &opt);
David S. Millere9ce1cd2006-08-21 23:54:55 -0700367 if (police->tcfp_result)
Patrick McHardy24beeab2008-01-23 20:34:48 -0800368 NLA_PUT_U32(skb, TCA_POLICE_RESULT, police->tcfp_result);
David S. Millere9ce1cd2006-08-21 23:54:55 -0700369 if (police->tcfp_ewma_rate)
Patrick McHardy24beeab2008-01-23 20:34:48 -0800370 NLA_PUT_U32(skb, TCA_POLICE_AVRATE, police->tcfp_ewma_rate);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371 return skb->len;
372
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800373nla_put_failure:
Arnaldo Carvalho de Melodc5fc572007-03-25 23:06:12 -0700374 nlmsg_trim(skb, b);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375 return -1;
376}
377
378MODULE_AUTHOR("Alexey Kuznetsov");
379MODULE_DESCRIPTION("Policing actions");
380MODULE_LICENSE("GPL");
381
382static struct tc_action_ops act_police_ops = {
383 .kind = "police",
David S. Millere9ce1cd2006-08-21 23:54:55 -0700384 .hinfo = &police_hash_info,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385 .type = TCA_ID_POLICE,
386 .capab = TCA_CAP_NONE,
387 .owner = THIS_MODULE,
388 .act = tcf_act_police,
389 .dump = tcf_act_police_dump,
390 .cleanup = tcf_act_police_cleanup,
David S. Millere9ce1cd2006-08-21 23:54:55 -0700391 .lookup = tcf_hash_search,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392 .init = tcf_act_police_locate,
Jamal Hadi Salim83b950c2006-04-06 22:24:22 -0700393 .walk = tcf_act_police_walker
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394};
395
396static int __init
397police_init_module(void)
398{
399 return tcf_register_action(&act_police_ops);
400}
401
402static void __exit
403police_cleanup_module(void)
404{
405 tcf_unregister_action(&act_police_ops);
Eric Dumazetc7de2cf2010-06-09 02:09:23 +0000406 rcu_barrier(); /* Wait for completion of call_rcu()'s (tcf_police_free_rcu) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407}
408
409module_init(police_init_module);
410module_exit(police_cleanup_module);