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1/*
2 * net/sched/ipt.c iptables target interface
3 *
4 *TODO: Add other tables. For now we only support the ipv4 table targets
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
10 *
11 * Copyright: Jamal Hadi Salim (2002-4)
12 */
13
14#include <linux/types.h>
15#include <linux/kernel.h>
16#include <linux/string.h>
17#include <linux/errno.h>
18#include <linux/skbuff.h>
19#include <linux/rtnetlink.h>
20#include <linux/module.h>
21#include <linux/init.h>
22#include <linux/slab.h>
23#include <net/netlink.h>
24#include <net/pkt_sched.h>
25#include <linux/tc_act/tc_ipt.h>
26#include <net/tc_act/tc_ipt.h>
27
28#include <linux/netfilter_ipv4/ip_tables.h>
29
30
31#define IPT_TAB_MASK 15
32static struct tcf_common *tcf_ipt_ht[IPT_TAB_MASK + 1];
33static u32 ipt_idx_gen;
34static DEFINE_RWLOCK(ipt_lock);
35
36static struct tcf_hashinfo ipt_hash_info = {
37 .htab = tcf_ipt_ht,
38 .hmask = IPT_TAB_MASK,
39 .lock = &ipt_lock,
40};
41
42static int ipt_init_target(struct xt_entry_target *t, char *table, unsigned int hook)
43{
44 struct xt_tgchk_param par;
45 struct xt_target *target;
46 int ret = 0;
47
48 target = xt_request_find_target(AF_INET, t->u.user.name,
49 t->u.user.revision);
50 if (IS_ERR(target))
51 return PTR_ERR(target);
52
53 t->u.kernel.target = target;
54 par.table = table;
55 par.entryinfo = NULL;
56 par.target = target;
57 par.targinfo = t->data;
58 par.hook_mask = hook;
59 par.family = NFPROTO_IPV4;
60
61 ret = xt_check_target(&par, t->u.target_size - sizeof(*t), 0, false);
62 if (ret < 0) {
63 module_put(t->u.kernel.target->me);
64 return ret;
65 }
66 return 0;
67}
68
69static void ipt_destroy_target(struct xt_entry_target *t)
70{
71 struct xt_tgdtor_param par = {
72 .target = t->u.kernel.target,
73 .targinfo = t->data,
74 };
75 if (par.target->destroy != NULL)
76 par.target->destroy(&par);
77 module_put(par.target->me);
78}
79
80static int tcf_ipt_release(struct tcf_ipt *ipt, int bind)
81{
82 int ret = 0;
83 if (ipt) {
84 if (bind)
85 ipt->tcf_bindcnt--;
86 ipt->tcf_refcnt--;
87 if (ipt->tcf_bindcnt <= 0 && ipt->tcf_refcnt <= 0) {
88 ipt_destroy_target(ipt->tcfi_t);
89 kfree(ipt->tcfi_tname);
90 kfree(ipt->tcfi_t);
91 tcf_hash_destroy(&ipt->common, &ipt_hash_info);
92 ret = ACT_P_DELETED;
93 }
94 }
95 return ret;
96}
97
98static const struct nla_policy ipt_policy[TCA_IPT_MAX + 1] = {
99 [TCA_IPT_TABLE] = { .type = NLA_STRING, .len = IFNAMSIZ },
100 [TCA_IPT_HOOK] = { .type = NLA_U32 },
101 [TCA_IPT_INDEX] = { .type = NLA_U32 },
102 [TCA_IPT_TARG] = { .len = sizeof(struct xt_entry_target) },
103};
104
105static int tcf_ipt_init(struct nlattr *nla, struct nlattr *est,
106 struct tc_action *a, int ovr, int bind)
107{
108 struct nlattr *tb[TCA_IPT_MAX + 1];
109 struct tcf_ipt *ipt;
110 struct tcf_common *pc;
111 struct xt_entry_target *td, *t;
112 char *tname;
113 int ret = 0, err;
114 u32 hook = 0;
115 u32 index = 0;
116
117 if (nla == NULL)
118 return -EINVAL;
119
120 err = nla_parse_nested(tb, TCA_IPT_MAX, nla, ipt_policy);
121 if (err < 0)
122 return err;
123
124 if (tb[TCA_IPT_HOOK] == NULL)
125 return -EINVAL;
126 if (tb[TCA_IPT_TARG] == NULL)
127 return -EINVAL;
128
129 td = (struct xt_entry_target *)nla_data(tb[TCA_IPT_TARG]);
130 if (nla_len(tb[TCA_IPT_TARG]) < td->u.target_size)
131 return -EINVAL;
132
133 if (tb[TCA_IPT_INDEX] != NULL)
134 index = nla_get_u32(tb[TCA_IPT_INDEX]);
135
136 pc = tcf_hash_check(index, a, bind, &ipt_hash_info);
137 if (!pc) {
138 pc = tcf_hash_create(index, est, a, sizeof(*ipt), bind,
139 &ipt_idx_gen, &ipt_hash_info);
140 if (IS_ERR(pc))
141 return PTR_ERR(pc);
142 ret = ACT_P_CREATED;
143 } else {
144 if (!ovr) {
145 tcf_ipt_release(to_ipt(pc), bind);
146 return -EEXIST;
147 }
148 }
149 ipt = to_ipt(pc);
150
151 hook = nla_get_u32(tb[TCA_IPT_HOOK]);
152
153 err = -ENOMEM;
154 tname = kmalloc(IFNAMSIZ, GFP_KERNEL);
155 if (unlikely(!tname))
156 goto err1;
157 if (tb[TCA_IPT_TABLE] == NULL ||
158 nla_strlcpy(tname, tb[TCA_IPT_TABLE], IFNAMSIZ) >= IFNAMSIZ)
159 strcpy(tname, "mangle");
160
161 t = kmemdup(td, td->u.target_size, GFP_KERNEL);
162 if (unlikely(!t))
163 goto err2;
164
165 err = ipt_init_target(t, tname, hook);
166 if (err < 0)
167 goto err3;
168
169 spin_lock_bh(&ipt->tcf_lock);
170 if (ret != ACT_P_CREATED) {
171 ipt_destroy_target(ipt->tcfi_t);
172 kfree(ipt->tcfi_tname);
173 kfree(ipt->tcfi_t);
174 }
175 ipt->tcfi_tname = tname;
176 ipt->tcfi_t = t;
177 ipt->tcfi_hook = hook;
178 spin_unlock_bh(&ipt->tcf_lock);
179 if (ret == ACT_P_CREATED)
180 tcf_hash_insert(pc, &ipt_hash_info);
181 return ret;
182
183err3:
184 kfree(t);
185err2:
186 kfree(tname);
187err1:
188 kfree(pc);
189 return err;
190}
191
192static int tcf_ipt_cleanup(struct tc_action *a, int bind)
193{
194 struct tcf_ipt *ipt = a->priv;
195 return tcf_ipt_release(ipt, bind);
196}
197
198static int tcf_ipt(struct sk_buff *skb, const struct tc_action *a,
199 struct tcf_result *res)
200{
201 int ret = 0, result = 0;
202 struct tcf_ipt *ipt = a->priv;
203 struct xt_action_param par;
204
205 if (skb_cloned(skb)) {
206 if (pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
207 return TC_ACT_UNSPEC;
208 }
209
210 spin_lock(&ipt->tcf_lock);
211
212 ipt->tcf_tm.lastuse = jiffies;
213 bstats_update(&ipt->tcf_bstats, skb);
214
215 /* yes, we have to worry about both in and out dev
216 * worry later - danger - this API seems to have changed
217 * from earlier kernels
218 */
219 par.in = skb->dev;
220 par.out = NULL;
221 par.hooknum = ipt->tcfi_hook;
222 par.target = ipt->tcfi_t->u.kernel.target;
223 par.targinfo = ipt->tcfi_t->data;
224 ret = par.target->target(skb, &par);
225
226 switch (ret) {
227 case NF_ACCEPT:
228 result = TC_ACT_OK;
229 break;
230 case NF_DROP:
231 result = TC_ACT_SHOT;
232 ipt->tcf_qstats.drops++;
233 break;
234 case XT_CONTINUE:
235 result = TC_ACT_PIPE;
236 break;
237 default:
238 if (net_ratelimit())
239 pr_notice("tc filter: Bogus netfilter code"
240 " %d assume ACCEPT\n", ret);
241 result = TC_POLICE_OK;
242 break;
243 }
244 spin_unlock(&ipt->tcf_lock);
245 return result;
246
247}
248
249static int tcf_ipt_dump(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
250{
251 unsigned char *b = skb_tail_pointer(skb);
252 struct tcf_ipt *ipt = a->priv;
253 struct xt_entry_target *t;
254 struct tcf_t tm;
255 struct tc_cnt c;
256
257 /* for simple targets kernel size == user size
258 * user name = target name
259 * for foolproof you need to not assume this
260 */
261
262 t = kmemdup(ipt->tcfi_t, ipt->tcfi_t->u.user.target_size, GFP_ATOMIC);
263 if (unlikely(!t))
264 goto nla_put_failure;
265
266 c.bindcnt = ipt->tcf_bindcnt - bind;
267 c.refcnt = ipt->tcf_refcnt - ref;
268 strcpy(t->u.user.name, ipt->tcfi_t->u.kernel.target->name);
269
270 NLA_PUT(skb, TCA_IPT_TARG, ipt->tcfi_t->u.user.target_size, t);
271 NLA_PUT_U32(skb, TCA_IPT_INDEX, ipt->tcf_index);
272 NLA_PUT_U32(skb, TCA_IPT_HOOK, ipt->tcfi_hook);
273 NLA_PUT(skb, TCA_IPT_CNT, sizeof(struct tc_cnt), &c);
274 NLA_PUT_STRING(skb, TCA_IPT_TABLE, ipt->tcfi_tname);
275 tm.install = jiffies_to_clock_t(jiffies - ipt->tcf_tm.install);
276 tm.lastuse = jiffies_to_clock_t(jiffies - ipt->tcf_tm.lastuse);
277 tm.expires = jiffies_to_clock_t(ipt->tcf_tm.expires);
278 NLA_PUT(skb, TCA_IPT_TM, sizeof (tm), &tm);
279 kfree(t);
280 return skb->len;
281
282nla_put_failure:
283 nlmsg_trim(skb, b);
284 kfree(t);
285 return -1;
286}
287
288static struct tc_action_ops act_ipt_ops = {
289 .kind = "ipt",
290 .hinfo = &ipt_hash_info,
291 .type = TCA_ACT_IPT,
292 .capab = TCA_CAP_NONE,
293 .owner = THIS_MODULE,
294 .act = tcf_ipt,
295 .dump = tcf_ipt_dump,
296 .cleanup = tcf_ipt_cleanup,
297 .lookup = tcf_hash_search,
298 .init = tcf_ipt_init,
299 .walk = tcf_generic_walker
300};
301
302MODULE_AUTHOR("Jamal Hadi Salim(2002-4)");
303MODULE_DESCRIPTION("Iptables target actions");
304MODULE_LICENSE("GPL");
305
306static int __init ipt_init_module(void)
307{
308 return tcf_register_action(&act_ipt_ops);
309}
310
311static void __exit ipt_cleanup_module(void)
312{
313 tcf_unregister_action(&act_ipt_ops);
314}
315
316module_init(ipt_init_module);
317module_exit(ipt_cleanup_module);
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * net/sched/act_ipt.c iptables target interface
4 *
5 *TODO: Add other tables. For now we only support the ipv4 table targets
6 *
7 * Copyright: Jamal Hadi Salim (2002-13)
8 */
9
10#include <linux/types.h>
11#include <linux/kernel.h>
12#include <linux/string.h>
13#include <linux/errno.h>
14#include <linux/skbuff.h>
15#include <linux/rtnetlink.h>
16#include <linux/module.h>
17#include <linux/init.h>
18#include <linux/slab.h>
19#include <net/netlink.h>
20#include <net/pkt_sched.h>
21#include <linux/tc_act/tc_ipt.h>
22#include <net/tc_act/tc_ipt.h>
23
24#include <linux/netfilter_ipv4/ip_tables.h>
25
26
27static unsigned int ipt_net_id;
28static struct tc_action_ops act_ipt_ops;
29
30static unsigned int xt_net_id;
31static struct tc_action_ops act_xt_ops;
32
33static int ipt_init_target(struct net *net, struct xt_entry_target *t,
34 char *table, unsigned int hook)
35{
36 struct xt_tgchk_param par;
37 struct xt_target *target;
38 struct ipt_entry e = {};
39 int ret = 0;
40
41 target = xt_request_find_target(AF_INET, t->u.user.name,
42 t->u.user.revision);
43 if (IS_ERR(target))
44 return PTR_ERR(target);
45
46 t->u.kernel.target = target;
47 memset(&par, 0, sizeof(par));
48 par.net = net;
49 par.table = table;
50 par.entryinfo = &e;
51 par.target = target;
52 par.targinfo = t->data;
53 par.hook_mask = hook;
54 par.family = NFPROTO_IPV4;
55
56 ret = xt_check_target(&par, t->u.target_size - sizeof(*t), 0, false);
57 if (ret < 0) {
58 module_put(t->u.kernel.target->me);
59 return ret;
60 }
61 return 0;
62}
63
64static void ipt_destroy_target(struct xt_entry_target *t, struct net *net)
65{
66 struct xt_tgdtor_param par = {
67 .target = t->u.kernel.target,
68 .targinfo = t->data,
69 .family = NFPROTO_IPV4,
70 .net = net,
71 };
72 if (par.target->destroy != NULL)
73 par.target->destroy(&par);
74 module_put(par.target->me);
75}
76
77static void tcf_ipt_release(struct tc_action *a)
78{
79 struct tcf_ipt *ipt = to_ipt(a);
80
81 if (ipt->tcfi_t) {
82 ipt_destroy_target(ipt->tcfi_t, a->idrinfo->net);
83 kfree(ipt->tcfi_t);
84 }
85 kfree(ipt->tcfi_tname);
86}
87
88static const struct nla_policy ipt_policy[TCA_IPT_MAX + 1] = {
89 [TCA_IPT_TABLE] = { .type = NLA_STRING, .len = IFNAMSIZ },
90 [TCA_IPT_HOOK] = { .type = NLA_U32 },
91 [TCA_IPT_INDEX] = { .type = NLA_U32 },
92 [TCA_IPT_TARG] = { .len = sizeof(struct xt_entry_target) },
93};
94
95static int __tcf_ipt_init(struct net *net, unsigned int id, struct nlattr *nla,
96 struct nlattr *est, struct tc_action **a,
97 const struct tc_action_ops *ops, int ovr, int bind,
98 struct tcf_proto *tp, u32 flags)
99{
100 struct tc_action_net *tn = net_generic(net, id);
101 struct nlattr *tb[TCA_IPT_MAX + 1];
102 struct tcf_ipt *ipt;
103 struct xt_entry_target *td, *t;
104 char *tname;
105 bool exists = false;
106 int ret = 0, err;
107 u32 hook = 0;
108 u32 index = 0;
109
110 if (nla == NULL)
111 return -EINVAL;
112
113 err = nla_parse_nested_deprecated(tb, TCA_IPT_MAX, nla, ipt_policy,
114 NULL);
115 if (err < 0)
116 return err;
117
118 if (tb[TCA_IPT_INDEX] != NULL)
119 index = nla_get_u32(tb[TCA_IPT_INDEX]);
120
121 err = tcf_idr_check_alloc(tn, &index, a, bind);
122 if (err < 0)
123 return err;
124 exists = err;
125 if (exists && bind)
126 return 0;
127
128 if (tb[TCA_IPT_HOOK] == NULL || tb[TCA_IPT_TARG] == NULL) {
129 if (exists)
130 tcf_idr_release(*a, bind);
131 else
132 tcf_idr_cleanup(tn, index);
133 return -EINVAL;
134 }
135
136 td = (struct xt_entry_target *)nla_data(tb[TCA_IPT_TARG]);
137 if (nla_len(tb[TCA_IPT_TARG]) != td->u.target_size) {
138 if (exists)
139 tcf_idr_release(*a, bind);
140 else
141 tcf_idr_cleanup(tn, index);
142 return -EINVAL;
143 }
144
145 if (!exists) {
146 ret = tcf_idr_create(tn, index, est, a, ops, bind,
147 false, 0);
148 if (ret) {
149 tcf_idr_cleanup(tn, index);
150 return ret;
151 }
152 ret = ACT_P_CREATED;
153 } else {
154 if (bind)/* dont override defaults */
155 return 0;
156
157 if (!ovr) {
158 tcf_idr_release(*a, bind);
159 return -EEXIST;
160 }
161 }
162 hook = nla_get_u32(tb[TCA_IPT_HOOK]);
163
164 err = -ENOMEM;
165 tname = kmalloc(IFNAMSIZ, GFP_KERNEL);
166 if (unlikely(!tname))
167 goto err1;
168 if (tb[TCA_IPT_TABLE] == NULL ||
169 nla_strlcpy(tname, tb[TCA_IPT_TABLE], IFNAMSIZ) >= IFNAMSIZ)
170 strcpy(tname, "mangle");
171
172 t = kmemdup(td, td->u.target_size, GFP_KERNEL);
173 if (unlikely(!t))
174 goto err2;
175
176 err = ipt_init_target(net, t, tname, hook);
177 if (err < 0)
178 goto err3;
179
180 ipt = to_ipt(*a);
181
182 spin_lock_bh(&ipt->tcf_lock);
183 if (ret != ACT_P_CREATED) {
184 ipt_destroy_target(ipt->tcfi_t, net);
185 kfree(ipt->tcfi_tname);
186 kfree(ipt->tcfi_t);
187 }
188 ipt->tcfi_tname = tname;
189 ipt->tcfi_t = t;
190 ipt->tcfi_hook = hook;
191 spin_unlock_bh(&ipt->tcf_lock);
192 return ret;
193
194err3:
195 kfree(t);
196err2:
197 kfree(tname);
198err1:
199 tcf_idr_release(*a, bind);
200 return err;
201}
202
203static int tcf_ipt_init(struct net *net, struct nlattr *nla,
204 struct nlattr *est, struct tc_action **a, int ovr,
205 int bind, bool rtnl_held, struct tcf_proto *tp,
206 u32 flags, struct netlink_ext_ack *extack)
207{
208 return __tcf_ipt_init(net, ipt_net_id, nla, est, a, &act_ipt_ops, ovr,
209 bind, tp, flags);
210}
211
212static int tcf_xt_init(struct net *net, struct nlattr *nla,
213 struct nlattr *est, struct tc_action **a, int ovr,
214 int bind, bool unlocked, struct tcf_proto *tp,
215 u32 flags, struct netlink_ext_ack *extack)
216{
217 return __tcf_ipt_init(net, xt_net_id, nla, est, a, &act_xt_ops, ovr,
218 bind, tp, flags);
219}
220
221static int tcf_ipt_act(struct sk_buff *skb, const struct tc_action *a,
222 struct tcf_result *res)
223{
224 int ret = 0, result = 0;
225 struct tcf_ipt *ipt = to_ipt(a);
226 struct xt_action_param par;
227 struct nf_hook_state state = {
228 .net = dev_net(skb->dev),
229 .in = skb->dev,
230 .hook = ipt->tcfi_hook,
231 .pf = NFPROTO_IPV4,
232 };
233
234 if (skb_unclone(skb, GFP_ATOMIC))
235 return TC_ACT_UNSPEC;
236
237 spin_lock(&ipt->tcf_lock);
238
239 tcf_lastuse_update(&ipt->tcf_tm);
240 bstats_update(&ipt->tcf_bstats, skb);
241
242 /* yes, we have to worry about both in and out dev
243 * worry later - danger - this API seems to have changed
244 * from earlier kernels
245 */
246 par.state = &state;
247 par.target = ipt->tcfi_t->u.kernel.target;
248 par.targinfo = ipt->tcfi_t->data;
249 ret = par.target->target(skb, &par);
250
251 switch (ret) {
252 case NF_ACCEPT:
253 result = TC_ACT_OK;
254 break;
255 case NF_DROP:
256 result = TC_ACT_SHOT;
257 ipt->tcf_qstats.drops++;
258 break;
259 case XT_CONTINUE:
260 result = TC_ACT_PIPE;
261 break;
262 default:
263 net_notice_ratelimited("tc filter: Bogus netfilter code %d assume ACCEPT\n",
264 ret);
265 result = TC_ACT_OK;
266 break;
267 }
268 spin_unlock(&ipt->tcf_lock);
269 return result;
270
271}
272
273static int tcf_ipt_dump(struct sk_buff *skb, struct tc_action *a, int bind,
274 int ref)
275{
276 unsigned char *b = skb_tail_pointer(skb);
277 struct tcf_ipt *ipt = to_ipt(a);
278 struct xt_entry_target *t;
279 struct tcf_t tm;
280 struct tc_cnt c;
281
282 /* for simple targets kernel size == user size
283 * user name = target name
284 * for foolproof you need to not assume this
285 */
286
287 spin_lock_bh(&ipt->tcf_lock);
288 t = kmemdup(ipt->tcfi_t, ipt->tcfi_t->u.user.target_size, GFP_ATOMIC);
289 if (unlikely(!t))
290 goto nla_put_failure;
291
292 c.bindcnt = atomic_read(&ipt->tcf_bindcnt) - bind;
293 c.refcnt = refcount_read(&ipt->tcf_refcnt) - ref;
294 strcpy(t->u.user.name, ipt->tcfi_t->u.kernel.target->name);
295
296 if (nla_put(skb, TCA_IPT_TARG, ipt->tcfi_t->u.user.target_size, t) ||
297 nla_put_u32(skb, TCA_IPT_INDEX, ipt->tcf_index) ||
298 nla_put_u32(skb, TCA_IPT_HOOK, ipt->tcfi_hook) ||
299 nla_put(skb, TCA_IPT_CNT, sizeof(struct tc_cnt), &c) ||
300 nla_put_string(skb, TCA_IPT_TABLE, ipt->tcfi_tname))
301 goto nla_put_failure;
302
303 tcf_tm_dump(&tm, &ipt->tcf_tm);
304 if (nla_put_64bit(skb, TCA_IPT_TM, sizeof(tm), &tm, TCA_IPT_PAD))
305 goto nla_put_failure;
306
307 spin_unlock_bh(&ipt->tcf_lock);
308 kfree(t);
309 return skb->len;
310
311nla_put_failure:
312 spin_unlock_bh(&ipt->tcf_lock);
313 nlmsg_trim(skb, b);
314 kfree(t);
315 return -1;
316}
317
318static int tcf_ipt_walker(struct net *net, struct sk_buff *skb,
319 struct netlink_callback *cb, int type,
320 const struct tc_action_ops *ops,
321 struct netlink_ext_ack *extack)
322{
323 struct tc_action_net *tn = net_generic(net, ipt_net_id);
324
325 return tcf_generic_walker(tn, skb, cb, type, ops, extack);
326}
327
328static int tcf_ipt_search(struct net *net, struct tc_action **a, u32 index)
329{
330 struct tc_action_net *tn = net_generic(net, ipt_net_id);
331
332 return tcf_idr_search(tn, a, index);
333}
334
335static struct tc_action_ops act_ipt_ops = {
336 .kind = "ipt",
337 .id = TCA_ID_IPT,
338 .owner = THIS_MODULE,
339 .act = tcf_ipt_act,
340 .dump = tcf_ipt_dump,
341 .cleanup = tcf_ipt_release,
342 .init = tcf_ipt_init,
343 .walk = tcf_ipt_walker,
344 .lookup = tcf_ipt_search,
345 .size = sizeof(struct tcf_ipt),
346};
347
348static __net_init int ipt_init_net(struct net *net)
349{
350 struct tc_action_net *tn = net_generic(net, ipt_net_id);
351
352 return tc_action_net_init(net, tn, &act_ipt_ops);
353}
354
355static void __net_exit ipt_exit_net(struct list_head *net_list)
356{
357 tc_action_net_exit(net_list, ipt_net_id);
358}
359
360static struct pernet_operations ipt_net_ops = {
361 .init = ipt_init_net,
362 .exit_batch = ipt_exit_net,
363 .id = &ipt_net_id,
364 .size = sizeof(struct tc_action_net),
365};
366
367static int tcf_xt_walker(struct net *net, struct sk_buff *skb,
368 struct netlink_callback *cb, int type,
369 const struct tc_action_ops *ops,
370 struct netlink_ext_ack *extack)
371{
372 struct tc_action_net *tn = net_generic(net, xt_net_id);
373
374 return tcf_generic_walker(tn, skb, cb, type, ops, extack);
375}
376
377static int tcf_xt_search(struct net *net, struct tc_action **a, u32 index)
378{
379 struct tc_action_net *tn = net_generic(net, xt_net_id);
380
381 return tcf_idr_search(tn, a, index);
382}
383
384static struct tc_action_ops act_xt_ops = {
385 .kind = "xt",
386 .id = TCA_ID_XT,
387 .owner = THIS_MODULE,
388 .act = tcf_ipt_act,
389 .dump = tcf_ipt_dump,
390 .cleanup = tcf_ipt_release,
391 .init = tcf_xt_init,
392 .walk = tcf_xt_walker,
393 .lookup = tcf_xt_search,
394 .size = sizeof(struct tcf_ipt),
395};
396
397static __net_init int xt_init_net(struct net *net)
398{
399 struct tc_action_net *tn = net_generic(net, xt_net_id);
400
401 return tc_action_net_init(net, tn, &act_xt_ops);
402}
403
404static void __net_exit xt_exit_net(struct list_head *net_list)
405{
406 tc_action_net_exit(net_list, xt_net_id);
407}
408
409static struct pernet_operations xt_net_ops = {
410 .init = xt_init_net,
411 .exit_batch = xt_exit_net,
412 .id = &xt_net_id,
413 .size = sizeof(struct tc_action_net),
414};
415
416MODULE_AUTHOR("Jamal Hadi Salim(2002-13)");
417MODULE_DESCRIPTION("Iptables target actions");
418MODULE_LICENSE("GPL");
419MODULE_ALIAS("act_xt");
420
421static int __init ipt_init_module(void)
422{
423 int ret1, ret2;
424
425 ret1 = tcf_register_action(&act_xt_ops, &xt_net_ops);
426 if (ret1 < 0)
427 pr_err("Failed to load xt action\n");
428
429 ret2 = tcf_register_action(&act_ipt_ops, &ipt_net_ops);
430 if (ret2 < 0)
431 pr_err("Failed to load ipt action\n");
432
433 if (ret1 < 0 && ret2 < 0) {
434 return ret1;
435 } else
436 return 0;
437}
438
439static void __exit ipt_cleanup_module(void)
440{
441 tcf_unregister_action(&act_ipt_ops, &ipt_net_ops);
442 tcf_unregister_action(&act_xt_ops, &xt_net_ops);
443}
444
445module_init(ipt_init_module);
446module_exit(ipt_cleanup_module);