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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 {
26 struct tcf_common common;
27 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};
40#define to_police(pc) \
WANG Conga03e6fe2016-06-06 09:54:30 -070041 container_of(pc->priv, struct tcf_police, common)
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;
59
60static int tcf_act_police_walker(struct net *net, struct sk_buff *skb,
61 struct netlink_callback *cb, int type,
62 struct tc_action *a)
Linus Torvalds1da177e2005-04-16 15:20:36 -070063{
WANG Congddf97cc2016-02-22 15:57:53 -080064 struct tc_action_net *tn = net_generic(net, police_net_id);
65 struct tcf_hashinfo *hinfo = tn->hinfo;
WANG Cong89819dc2013-12-15 20:15:09 -080066 struct hlist_head *head;
David S. Millere9ce1cd2006-08-21 23:54:55 -070067 struct tcf_common *p;
Linus Torvalds1da177e2005-04-16 15:20:36 -070068 int err = 0, index = -1, i = 0, s_i = 0, n_i = 0;
Patrick McHardy4b3550ef2008-01-23 20:34:11 -080069 struct nlattr *nest;
Linus Torvalds1da177e2005-04-16 15:20:36 -070070
WANG Congc779f7a2014-01-17 11:37:02 -080071 spin_lock_bh(&hinfo->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -070072
73 s_i = cb->args[0];
74
David S. Millere9ce1cd2006-08-21 23:54:55 -070075 for (i = 0; i < (POL_TAB_MASK + 1); i++) {
WANG Congc779f7a2014-01-17 11:37:02 -080076 head = &hinfo->htab[tcf_hash(i, POL_TAB_MASK)];
Linus Torvalds1da177e2005-04-16 15:20:36 -070077
WANG Cong89819dc2013-12-15 20:15:09 -080078 hlist_for_each_entry_rcu(p, head, tcfc_head) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 index++;
80 if (index < s_i)
81 continue;
82 a->priv = p;
83 a->order = index;
Patrick McHardy4b3550ef2008-01-23 20:34:11 -080084 nest = nla_nest_start(skb, a->order);
85 if (nest == NULL)
86 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -070087 if (type == RTM_DELACTION)
88 err = tcf_action_dump_1(skb, a, 0, 1);
89 else
90 err = tcf_action_dump_1(skb, a, 0, 0);
91 if (err < 0) {
92 index--;
Patrick McHardy4b3550ef2008-01-23 20:34:11 -080093 nla_nest_cancel(skb, nest);
Linus Torvalds1da177e2005-04-16 15:20:36 -070094 goto done;
95 }
Patrick McHardy4b3550ef2008-01-23 20:34:11 -080096 nla_nest_end(skb, nest);
Linus Torvalds1da177e2005-04-16 15:20:36 -070097 n_i++;
98 }
99 }
100done:
WANG Congc779f7a2014-01-17 11:37:02 -0800101 spin_unlock_bh(&hinfo->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 if (n_i)
103 cb->args[0] += n_i;
104 return n_i;
105
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800106nla_put_failure:
Patrick McHardy4b3550ef2008-01-23 20:34:11 -0800107 nla_nest_cancel(skb, nest);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 goto done;
109}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110
Patrick McHardy53b2bf32008-01-23 20:36:30 -0800111static const struct nla_policy police_policy[TCA_POLICE_MAX + 1] = {
112 [TCA_POLICE_RATE] = { .len = TC_RTAB_SIZE },
113 [TCA_POLICE_PEAKRATE] = { .len = TC_RTAB_SIZE },
114 [TCA_POLICE_AVRATE] = { .type = NLA_U32 },
115 [TCA_POLICE_RESULT] = { .type = NLA_U32 },
116};
117
Benjamin LaHaisec1b52732013-01-14 05:15:39 +0000118static int tcf_act_police_locate(struct net *net, struct nlattr *nla,
119 struct nlattr *est, struct tc_action *a,
120 int ovr, int bind)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 int ret = 0, err;
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800123 struct nlattr *tb[TCA_POLICE_MAX + 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 struct tc_police *parm;
David S. Millere9ce1cd2006-08-21 23:54:55 -0700125 struct tcf_police *police;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126 struct qdisc_rate_table *R_tab = NULL, *P_tab = NULL;
WANG Congddf97cc2016-02-22 15:57:53 -0800127 struct tc_action_net *tn = net_generic(net, police_net_id);
Patrick McHardy1e9b3d52006-11-30 19:54:05 -0800128 int size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129
Patrick McHardycee63722008-01-23 20:33:32 -0800130 if (nla == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 return -EINVAL;
132
Patrick McHardy53b2bf32008-01-23 20:36:30 -0800133 err = nla_parse_nested(tb, TCA_POLICE_MAX, nla, police_policy);
Patrick McHardycee63722008-01-23 20:33:32 -0800134 if (err < 0)
135 return err;
136
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800137 if (tb[TCA_POLICE_TBF] == NULL)
Patrick McHardy1e9b3d52006-11-30 19:54:05 -0800138 return -EINVAL;
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800139 size = nla_len(tb[TCA_POLICE_TBF]);
Patrick McHardy1e9b3d52006-11-30 19:54:05 -0800140 if (size != sizeof(*parm) && size != sizeof(struct tc_police_compat))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 return -EINVAL;
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800142 parm = nla_data(tb[TCA_POLICE_TBF]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143
David S. Millere9ce1cd2006-08-21 23:54:55 -0700144 if (parm->index) {
WANG Congddf97cc2016-02-22 15:57:53 -0800145 if (tcf_hash_search(tn, a, parm->index)) {
WANG Conga03e6fe2016-06-06 09:54:30 -0700146 police = to_police(a);
David S. Millere9ce1cd2006-08-21 23:54:55 -0700147 if (bind) {
148 police->tcf_bindcnt += 1;
149 police->tcf_refcnt += 1;
Jamal Hadi Salim1a293212013-12-23 08:02:11 -0500150 return 0;
David S. Millere9ce1cd2006-08-21 23:54:55 -0700151 }
152 if (ovr)
153 goto override;
Jamal Hadi Salim1a293212013-12-23 08:02:11 -0500154 /* not replacing */
155 return -EEXIST;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 }
WANG Conga03e6fe2016-06-06 09:54:30 -0700157 } else {
158 ret = tcf_hash_create(tn, parm->index, NULL, a,
159 sizeof(*police), bind, false);
160 if (ret)
161 return ret;
162 ret = ACT_P_CREATED;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 }
164
WANG Conga03e6fe2016-06-06 09:54:30 -0700165 police = to_police(a);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166override:
167 if (parm->rate.rate) {
168 err = -ENOMEM;
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800169 R_tab = qdisc_get_rtab(&parm->rate, tb[TCA_POLICE_RATE]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 if (R_tab == NULL)
171 goto failure;
Stephen Hemmingerc1b56872008-11-25 21:14:06 -0800172
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 if (parm->peakrate.rate) {
174 P_tab = qdisc_get_rtab(&parm->peakrate,
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800175 tb[TCA_POLICE_PEAKRATE]);
Stephen Hemminger71bcb092008-11-25 21:13:31 -0800176 if (P_tab == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 goto failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 }
179 }
Stephen Hemminger71bcb092008-11-25 21:13:31 -0800180
David S. Millere9ce1cd2006-08-21 23:54:55 -0700181 spin_lock_bh(&police->tcf_lock);
Stephen Hemminger71bcb092008-11-25 21:13:31 -0800182 if (est) {
John Fastabend22e0f8b2014-09-28 11:52:56 -0700183 err = gen_replace_estimator(&police->tcf_bstats, NULL,
Stephen Hemminger71bcb092008-11-25 21:13:31 -0800184 &police->tcf_rate_est,
185 &police->tcf_lock, est);
186 if (err)
187 goto failure_unlock;
Jarek Poplawskia883bf52009-03-04 17:38:10 -0800188 } else if (tb[TCA_POLICE_AVRATE] &&
189 (ret == ACT_P_CREATED ||
190 !gen_estimator_active(&police->tcf_bstats,
191 &police->tcf_rate_est))) {
192 err = -EINVAL;
193 goto failure_unlock;
Stephen Hemminger71bcb092008-11-25 21:13:31 -0800194 }
195
196 /* No failure allowed after this point */
Jiri Pirkoc6d14ff2013-02-12 00:12:07 +0000197 police->tcfp_mtu = parm->mtu;
198 if (police->tcfp_mtu == 0) {
199 police->tcfp_mtu = ~0;
200 if (R_tab)
201 police->tcfp_mtu = 255 << R_tab->rate.cell_log;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 }
Jiri Pirkoc6d14ff2013-02-12 00:12:07 +0000203 if (R_tab) {
204 police->rate_present = true;
Eric Dumazet3e1e3aa2013-09-19 09:10:03 -0700205 psched_ratecfg_precompute(&police->rate, &R_tab->rate, 0);
Jiri Pirkoc6d14ff2013-02-12 00:12:07 +0000206 qdisc_put_rtab(R_tab);
207 } else {
208 police->rate_present = false;
209 }
210 if (P_tab) {
211 police->peak_present = true;
Eric Dumazet3e1e3aa2013-09-19 09:10:03 -0700212 psched_ratecfg_precompute(&police->peak, &P_tab->rate, 0);
Jiri Pirkoc6d14ff2013-02-12 00:12:07 +0000213 qdisc_put_rtab(P_tab);
214 } else {
215 police->peak_present = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 }
217
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800218 if (tb[TCA_POLICE_RESULT])
Patrick McHardy1587bac2008-01-23 20:35:03 -0800219 police->tcfp_result = nla_get_u32(tb[TCA_POLICE_RESULT]);
Jiri Pirkoc6d14ff2013-02-12 00:12:07 +0000220 police->tcfp_burst = PSCHED_TICKS2NS(parm->burst);
221 police->tcfp_toks = police->tcfp_burst;
222 if (police->peak_present) {
223 police->tcfp_mtu_ptoks = (s64) psched_l2t_ns(&police->peak,
224 police->tcfp_mtu);
225 police->tcfp_ptoks = police->tcfp_mtu_ptoks;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 }
David S. Millere9ce1cd2006-08-21 23:54:55 -0700227 police->tcf_action = parm->action;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800229 if (tb[TCA_POLICE_AVRATE])
Patrick McHardy1587bac2008-01-23 20:35:03 -0800230 police->tcfp_ewma_rate = nla_get_u32(tb[TCA_POLICE_AVRATE]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231
David S. Millere9ce1cd2006-08-21 23:54:55 -0700232 spin_unlock_bh(&police->tcf_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 if (ret != ACT_P_CREATED)
234 return ret;
235
Eric Dumazetd2de8752014-08-22 18:32:09 -0700236 police->tcfp_t_c = ktime_get_ns();
WANG Conga03e6fe2016-06-06 09:54:30 -0700237 tcf_hash_insert(tn, a);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 return ret;
240
Stephen Hemminger71bcb092008-11-25 21:13:31 -0800241failure_unlock:
242 spin_unlock_bh(&police->tcf_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243failure:
Yang Yingliang3b69a4c2013-12-17 15:29:16 +0800244 qdisc_put_rtab(P_tab);
245 qdisc_put_rtab(R_tab);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 if (ret == ACT_P_CREATED)
WANG Conga03e6fe2016-06-06 09:54:30 -0700247 tcf_hash_cleanup(a, est);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248 return err;
249}
250
Eric Dumazetdc7f9f62011-07-05 23:25:42 +0000251static int tcf_act_police(struct sk_buff *skb, const struct tc_action *a,
YOSHIFUJI Hideaki10297b92007-02-09 23:25:16 +0900252 struct tcf_result *res)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253{
David S. Millere9ce1cd2006-08-21 23:54:55 -0700254 struct tcf_police *police = a->priv;
Jiri Pirkoc6d14ff2013-02-12 00:12:07 +0000255 s64 now;
256 s64 toks;
257 s64 ptoks = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258
David S. Millere9ce1cd2006-08-21 23:54:55 -0700259 spin_lock(&police->tcf_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260
Eric Dumazetbfe0d022011-01-09 08:30:54 +0000261 bstats_update(&police->tcf_bstats, skb);
Jamal Hadi Salim3d3ed182016-05-23 21:07:20 -0400262 tcf_lastuse_update(&police->tcf_tm);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263
David S. Millere9ce1cd2006-08-21 23:54:55 -0700264 if (police->tcfp_ewma_rate &&
265 police->tcf_rate_est.bps >= police->tcfp_ewma_rate) {
266 police->tcf_qstats.overlimits++;
Jarek Poplawskib9647582009-06-16 08:33:55 +0000267 if (police->tcf_action == TC_ACT_SHOT)
268 police->tcf_qstats.drops++;
David S. Millere9ce1cd2006-08-21 23:54:55 -0700269 spin_unlock(&police->tcf_lock);
270 return police->tcf_action;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272
Jussi Kivilinna0abf77e2008-07-20 00:08:27 -0700273 if (qdisc_pkt_len(skb) <= police->tcfp_mtu) {
Jiri Pirkoc6d14ff2013-02-12 00:12:07 +0000274 if (!police->rate_present) {
David S. Millere9ce1cd2006-08-21 23:54:55 -0700275 spin_unlock(&police->tcf_lock);
276 return police->tcfp_result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 }
278
Eric Dumazetd2de8752014-08-22 18:32:09 -0700279 now = ktime_get_ns();
Jiri Pirkoc6d14ff2013-02-12 00:12:07 +0000280 toks = min_t(s64, now - police->tcfp_t_c,
281 police->tcfp_burst);
282 if (police->peak_present) {
David S. Millere9ce1cd2006-08-21 23:54:55 -0700283 ptoks = toks + police->tcfp_ptoks;
Jiri Pirkoc6d14ff2013-02-12 00:12:07 +0000284 if (ptoks > police->tcfp_mtu_ptoks)
285 ptoks = police->tcfp_mtu_ptoks;
286 ptoks -= (s64) psched_l2t_ns(&police->peak,
287 qdisc_pkt_len(skb));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 }
David S. Millere9ce1cd2006-08-21 23:54:55 -0700289 toks += police->tcfp_toks;
Jiri Pirkoc6d14ff2013-02-12 00:12:07 +0000290 if (toks > police->tcfp_burst)
David S. Millere9ce1cd2006-08-21 23:54:55 -0700291 toks = police->tcfp_burst;
Jiri Pirkoc6d14ff2013-02-12 00:12:07 +0000292 toks -= (s64) psched_l2t_ns(&police->rate, qdisc_pkt_len(skb));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 if ((toks|ptoks) >= 0) {
David S. Millere9ce1cd2006-08-21 23:54:55 -0700294 police->tcfp_t_c = now;
295 police->tcfp_toks = toks;
296 police->tcfp_ptoks = ptoks;
297 spin_unlock(&police->tcf_lock);
298 return police->tcfp_result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 }
300 }
301
David S. Millere9ce1cd2006-08-21 23:54:55 -0700302 police->tcf_qstats.overlimits++;
Jarek Poplawskib9647582009-06-16 08:33:55 +0000303 if (police->tcf_action == TC_ACT_SHOT)
304 police->tcf_qstats.drops++;
David S. Millere9ce1cd2006-08-21 23:54:55 -0700305 spin_unlock(&police->tcf_lock);
306 return police->tcf_action;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307}
308
309static int
310tcf_act_police_dump(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
311{
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700312 unsigned char *b = skb_tail_pointer(skb);
David S. Millere9ce1cd2006-08-21 23:54:55 -0700313 struct tcf_police *police = a->priv;
Jeff Mahoney0f04cfd2010-08-31 13:21:42 +0000314 struct tc_police opt = {
315 .index = police->tcf_index,
316 .action = police->tcf_action,
317 .mtu = police->tcfp_mtu,
Jiri Pirkoc6d14ff2013-02-12 00:12:07 +0000318 .burst = PSCHED_NS2TICKS(police->tcfp_burst),
Jeff Mahoney0f04cfd2010-08-31 13:21:42 +0000319 .refcnt = police->tcf_refcnt - ref,
320 .bindcnt = police->tcf_bindcnt - bind,
321 };
Jamal Hadi Salim3d3ed182016-05-23 21:07:20 -0400322 struct tcf_t t;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323
Jiri Pirkoc6d14ff2013-02-12 00:12:07 +0000324 if (police->rate_present)
Eric Dumazet01cb71d2013-06-02 13:55:05 +0000325 psched_ratecfg_getrate(&opt.rate, &police->rate);
Jiri Pirkoc6d14ff2013-02-12 00:12:07 +0000326 if (police->peak_present)
Eric Dumazet01cb71d2013-06-02 13:55:05 +0000327 psched_ratecfg_getrate(&opt.peakrate, &police->peak);
David S. Miller1b34ec42012-03-29 05:11:39 -0400328 if (nla_put(skb, TCA_POLICE_TBF, sizeof(opt), &opt))
329 goto nla_put_failure;
330 if (police->tcfp_result &&
331 nla_put_u32(skb, TCA_POLICE_RESULT, police->tcfp_result))
332 goto nla_put_failure;
333 if (police->tcfp_ewma_rate &&
334 nla_put_u32(skb, TCA_POLICE_AVRATE, police->tcfp_ewma_rate))
335 goto nla_put_failure;
Jamal Hadi Salim3d3ed182016-05-23 21:07:20 -0400336
337 t.install = jiffies_to_clock_t(jiffies - police->tcf_tm.install);
338 t.lastuse = jiffies_to_clock_t(jiffies - police->tcf_tm.lastuse);
339 t.expires = jiffies_to_clock_t(police->tcf_tm.expires);
340 if (nla_put_64bit(skb, TCA_POLICE_TM, sizeof(t), &t, TCA_POLICE_PAD))
341 goto nla_put_failure;
342
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343 return skb->len;
344
Patrick McHardy7ba699c2008-01-22 22:11:50 -0800345nla_put_failure:
Arnaldo Carvalho de Melodc5fc572007-03-25 23:06:12 -0700346 nlmsg_trim(skb, b);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347 return -1;
348}
349
WANG Congddf97cc2016-02-22 15:57:53 -0800350static int tcf_police_search(struct net *net, struct tc_action *a, u32 index)
351{
352 struct tc_action_net *tn = net_generic(net, police_net_id);
353
354 return tcf_hash_search(tn, a, index);
355}
356
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357MODULE_AUTHOR("Alexey Kuznetsov");
358MODULE_DESCRIPTION("Policing actions");
359MODULE_LICENSE("GPL");
360
361static struct tc_action_ops act_police_ops = {
362 .kind = "police",
363 .type = TCA_ID_POLICE,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 .owner = THIS_MODULE,
365 .act = tcf_act_police,
366 .dump = tcf_act_police_dump,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367 .init = tcf_act_police_locate,
WANG Congddf97cc2016-02-22 15:57:53 -0800368 .walk = tcf_act_police_walker,
369 .lookup = tcf_police_search,
370};
371
372static __net_init int police_init_net(struct net *net)
373{
374 struct tc_action_net *tn = net_generic(net, police_net_id);
375
376 return tc_action_net_init(tn, &act_police_ops, POL_TAB_MASK);
377}
378
379static void __net_exit police_exit_net(struct net *net)
380{
381 struct tc_action_net *tn = net_generic(net, police_net_id);
382
383 tc_action_net_exit(tn);
384}
385
386static struct pernet_operations police_net_ops = {
387 .init = police_init_net,
388 .exit = police_exit_net,
389 .id = &police_net_id,
390 .size = sizeof(struct tc_action_net),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391};
392
393static int __init
394police_init_module(void)
395{
WANG Congddf97cc2016-02-22 15:57:53 -0800396 return tcf_register_action(&act_police_ops, &police_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397}
398
399static void __exit
400police_cleanup_module(void)
401{
WANG Congddf97cc2016-02-22 15:57:53 -0800402 tcf_unregister_action(&act_police_ops, &police_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403}
404
405module_init(police_init_module);
406module_exit(police_cleanup_module);