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Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
0c6965dd | 2 | * net/sched/act_pedit.c Generic packet editor |
1da177e4 LT |
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: Jamal Hadi Salim (2002-4) | |
10 | */ | |
11 | ||
1da177e4 LT |
12 | #include <linux/types.h> |
13 | #include <linux/kernel.h> | |
1da177e4 | 14 | #include <linux/string.h> |
1da177e4 | 15 | #include <linux/errno.h> |
1da177e4 LT |
16 | #include <linux/skbuff.h> |
17 | #include <linux/rtnetlink.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/init.h> | |
5a0e3ad6 | 20 | #include <linux/slab.h> |
dc5fc579 | 21 | #include <net/netlink.h> |
1da177e4 LT |
22 | #include <net/pkt_sched.h> |
23 | #include <linux/tc_act/tc_pedit.h> | |
24 | #include <net/tc_act/tc_pedit.h> | |
71d0ed70 | 25 | #include <uapi/linux/tc_act/tc_pedit.h> |
1da177e4 | 26 | |
c7d03a00 | 27 | static unsigned int pedit_net_id; |
a85a970a | 28 | static struct tc_action_ops act_pedit_ops; |
ddf97ccd | 29 | |
53b2bf3f | 30 | static const struct nla_policy pedit_policy[TCA_PEDIT_MAX + 1] = { |
53f7e35f | 31 | [TCA_PEDIT_PARMS] = { .len = sizeof(struct tc_pedit) }, |
71d0ed70 | 32 | [TCA_PEDIT_KEYS_EX] = { .type = NLA_NESTED }, |
53b2bf3f PM |
33 | }; |
34 | ||
71d0ed70 AV |
35 | static const struct nla_policy pedit_key_ex_policy[TCA_PEDIT_KEY_EX_MAX + 1] = { |
36 | [TCA_PEDIT_KEY_EX_HTYPE] = { .type = NLA_U16 }, | |
853a14ba | 37 | [TCA_PEDIT_KEY_EX_CMD] = { .type = NLA_U16 }, |
71d0ed70 AV |
38 | }; |
39 | ||
40 | static struct tcf_pedit_key_ex *tcf_pedit_keys_ex_parse(struct nlattr *nla, | |
41 | u8 n) | |
42 | { | |
43 | struct tcf_pedit_key_ex *keys_ex; | |
44 | struct tcf_pedit_key_ex *k; | |
45 | const struct nlattr *ka; | |
46 | int err = -EINVAL; | |
47 | int rem; | |
48 | ||
49 | if (!nla || !n) | |
50 | return NULL; | |
51 | ||
52 | keys_ex = kcalloc(n, sizeof(*k), GFP_KERNEL); | |
53 | if (!keys_ex) | |
54 | return ERR_PTR(-ENOMEM); | |
55 | ||
56 | k = keys_ex; | |
57 | ||
58 | nla_for_each_nested(ka, nla, rem) { | |
59 | struct nlattr *tb[TCA_PEDIT_KEY_EX_MAX + 1]; | |
60 | ||
61 | if (!n) { | |
62 | err = -EINVAL; | |
63 | goto err_out; | |
64 | } | |
65 | n--; | |
66 | ||
67 | if (nla_type(ka) != TCA_PEDIT_KEY_EX) { | |
68 | err = -EINVAL; | |
69 | goto err_out; | |
70 | } | |
71 | ||
72 | err = nla_parse_nested(tb, TCA_PEDIT_KEY_EX_MAX, ka, | |
fceb6435 | 73 | pedit_key_ex_policy, NULL); |
71d0ed70 AV |
74 | if (err) |
75 | goto err_out; | |
76 | ||
853a14ba AV |
77 | if (!tb[TCA_PEDIT_KEY_EX_HTYPE] || |
78 | !tb[TCA_PEDIT_KEY_EX_CMD]) { | |
71d0ed70 AV |
79 | err = -EINVAL; |
80 | goto err_out; | |
81 | } | |
82 | ||
83 | k->htype = nla_get_u16(tb[TCA_PEDIT_KEY_EX_HTYPE]); | |
853a14ba | 84 | k->cmd = nla_get_u16(tb[TCA_PEDIT_KEY_EX_CMD]); |
71d0ed70 | 85 | |
853a14ba AV |
86 | if (k->htype > TCA_PEDIT_HDR_TYPE_MAX || |
87 | k->cmd > TCA_PEDIT_CMD_MAX) { | |
71d0ed70 AV |
88 | err = -EINVAL; |
89 | goto err_out; | |
90 | } | |
91 | ||
92 | k++; | |
93 | } | |
94 | ||
c4f65b09 DC |
95 | if (n) { |
96 | err = -EINVAL; | |
71d0ed70 | 97 | goto err_out; |
c4f65b09 | 98 | } |
71d0ed70 AV |
99 | |
100 | return keys_ex; | |
101 | ||
102 | err_out: | |
103 | kfree(keys_ex); | |
104 | return ERR_PTR(err); | |
105 | } | |
106 | ||
107 | static int tcf_pedit_key_ex_dump(struct sk_buff *skb, | |
108 | struct tcf_pedit_key_ex *keys_ex, int n) | |
109 | { | |
110 | struct nlattr *keys_start = nla_nest_start(skb, TCA_PEDIT_KEYS_EX); | |
111 | ||
112 | for (; n > 0; n--) { | |
113 | struct nlattr *key_start; | |
114 | ||
115 | key_start = nla_nest_start(skb, TCA_PEDIT_KEY_EX); | |
116 | ||
853a14ba AV |
117 | if (nla_put_u16(skb, TCA_PEDIT_KEY_EX_HTYPE, keys_ex->htype) || |
118 | nla_put_u16(skb, TCA_PEDIT_KEY_EX_CMD, keys_ex->cmd)) { | |
71d0ed70 AV |
119 | nlmsg_trim(skb, keys_start); |
120 | return -EINVAL; | |
121 | } | |
122 | ||
123 | nla_nest_end(skb, key_start); | |
124 | ||
125 | keys_ex++; | |
126 | } | |
127 | ||
128 | nla_nest_end(skb, keys_start); | |
129 | ||
130 | return 0; | |
131 | } | |
132 | ||
c1b52739 | 133 | static int tcf_pedit_init(struct net *net, struct nlattr *nla, |
a85a970a | 134 | struct nlattr *est, struct tc_action **a, |
589dad6d | 135 | int ovr, int bind, struct netlink_ext_ack *extack) |
1da177e4 | 136 | { |
ddf97ccd | 137 | struct tc_action_net *tn = net_generic(net, pedit_net_id); |
7ba699c6 | 138 | struct nlattr *tb[TCA_PEDIT_MAX + 1]; |
1da177e4 | 139 | struct tc_pedit_key *keys = NULL; |
71d0ed70 | 140 | struct tcf_pedit_key_ex *keys_ex; |
80f0f574 RM |
141 | struct tc_pedit *parm; |
142 | struct nlattr *pattr; | |
143 | struct tcf_pedit *p; | |
144 | int ret = 0, err; | |
1da177e4 LT |
145 | int ksize; |
146 | ||
9868c0b2 RM |
147 | if (!nla) { |
148 | NL_SET_ERR_MSG_MOD(extack, "Pedit requires attributes to be passed"); | |
1da177e4 | 149 | return -EINVAL; |
9868c0b2 | 150 | } |
1da177e4 | 151 | |
fceb6435 | 152 | err = nla_parse_nested(tb, TCA_PEDIT_MAX, nla, pedit_policy, NULL); |
cee63723 PM |
153 | if (err < 0) |
154 | return err; | |
155 | ||
71d0ed70 AV |
156 | pattr = tb[TCA_PEDIT_PARMS]; |
157 | if (!pattr) | |
158 | pattr = tb[TCA_PEDIT_PARMS_EX]; | |
9868c0b2 RM |
159 | if (!pattr) { |
160 | NL_SET_ERR_MSG_MOD(extack, "Missing required TCA_PEDIT_PARMS or TCA_PEDIT_PARMS_EX pedit attribute"); | |
1da177e4 | 161 | return -EINVAL; |
9868c0b2 | 162 | } |
71d0ed70 AV |
163 | |
164 | parm = nla_data(pattr); | |
1da177e4 | 165 | ksize = parm->nkeys * sizeof(struct tc_pedit_key); |
9868c0b2 RM |
166 | if (nla_len(pattr) < sizeof(*parm) + ksize) { |
167 | NL_SET_ERR_MSG_ATTR(extack, pattr, "Length of TCA_PEDIT_PARMS or TCA_PEDIT_PARMS_EX pedit attribute is invalid"); | |
1da177e4 | 168 | return -EINVAL; |
9868c0b2 | 169 | } |
1da177e4 | 170 | |
71d0ed70 AV |
171 | keys_ex = tcf_pedit_keys_ex_parse(tb[TCA_PEDIT_KEYS_EX], parm->nkeys); |
172 | if (IS_ERR(keys_ex)) | |
173 | return PTR_ERR(keys_ex); | |
174 | ||
65a206c0 | 175 | if (!tcf_idr_check(tn, parm->index, a, bind)) { |
9868c0b2 RM |
176 | if (!parm->nkeys) { |
177 | NL_SET_ERR_MSG_MOD(extack, "Pedit requires keys to be passed"); | |
30e99ed6 WY |
178 | ret = -EINVAL; |
179 | goto out_free; | |
9868c0b2 | 180 | } |
65a206c0 CM |
181 | ret = tcf_idr_create(tn, parm->index, est, a, |
182 | &act_pedit_ops, bind, false); | |
86062033 | 183 | if (ret) |
30e99ed6 | 184 | goto out_free; |
a85a970a | 185 | p = to_pedit(*a); |
1da177e4 | 186 | keys = kmalloc(ksize, GFP_KERNEL); |
80f0f574 | 187 | if (!keys) { |
94fa3f92 | 188 | tcf_idr_release(*a, bind); |
30e99ed6 WY |
189 | ret = -ENOMEM; |
190 | goto out_free; | |
1da177e4 LT |
191 | } |
192 | ret = ACT_P_CREATED; | |
193 | } else { | |
1a29321e | 194 | if (bind) |
30e99ed6 | 195 | goto out_free; |
65a206c0 | 196 | tcf_idr_release(*a, bind); |
30e99ed6 WY |
197 | if (!ovr) { |
198 | ret = -EEXIST; | |
199 | goto out_free; | |
200 | } | |
a85a970a | 201 | p = to_pedit(*a); |
e9ce1cd3 | 202 | if (p->tcfp_nkeys && p->tcfp_nkeys != parm->nkeys) { |
1da177e4 | 203 | keys = kmalloc(ksize, GFP_KERNEL); |
71d0ed70 | 204 | if (!keys) { |
30e99ed6 WY |
205 | ret = -ENOMEM; |
206 | goto out_free; | |
71d0ed70 | 207 | } |
1da177e4 LT |
208 | } |
209 | } | |
210 | ||
e9ce1cd3 DM |
211 | spin_lock_bh(&p->tcf_lock); |
212 | p->tcfp_flags = parm->flags; | |
213 | p->tcf_action = parm->action; | |
1da177e4 | 214 | if (keys) { |
e9ce1cd3 DM |
215 | kfree(p->tcfp_keys); |
216 | p->tcfp_keys = keys; | |
217 | p->tcfp_nkeys = parm->nkeys; | |
1da177e4 | 218 | } |
e9ce1cd3 | 219 | memcpy(p->tcfp_keys, parm->keys, ksize); |
71d0ed70 AV |
220 | |
221 | kfree(p->tcfp_keys_ex); | |
222 | p->tcfp_keys_ex = keys_ex; | |
223 | ||
e9ce1cd3 | 224 | spin_unlock_bh(&p->tcf_lock); |
1da177e4 | 225 | if (ret == ACT_P_CREATED) |
65a206c0 | 226 | tcf_idr_insert(tn, *a); |
1da177e4 | 227 | return ret; |
30e99ed6 WY |
228 | out_free: |
229 | kfree(keys_ex); | |
230 | return ret; | |
231 | ||
1da177e4 LT |
232 | } |
233 | ||
9a63b255 | 234 | static void tcf_pedit_cleanup(struct tc_action *a) |
1da177e4 | 235 | { |
a85a970a | 236 | struct tcf_pedit *p = to_pedit(a); |
a5b5c958 | 237 | struct tc_pedit_key *keys = p->tcfp_keys; |
80f0f574 | 238 | |
a5b5c958 | 239 | kfree(keys); |
71d0ed70 | 240 | kfree(p->tcfp_keys_ex); |
1da177e4 LT |
241 | } |
242 | ||
95c2027b AV |
243 | static bool offset_valid(struct sk_buff *skb, int offset) |
244 | { | |
245 | if (offset > 0 && offset > skb->len) | |
246 | return false; | |
247 | ||
248 | if (offset < 0 && -offset > skb_headroom(skb)) | |
249 | return false; | |
250 | ||
251 | return true; | |
252 | } | |
253 | ||
71d0ed70 AV |
254 | static int pedit_skb_hdr_offset(struct sk_buff *skb, |
255 | enum pedit_header_type htype, int *hoffset) | |
256 | { | |
257 | int ret = -EINVAL; | |
258 | ||
259 | switch (htype) { | |
260 | case TCA_PEDIT_KEY_EX_HDR_TYPE_ETH: | |
261 | if (skb_mac_header_was_set(skb)) { | |
262 | *hoffset = skb_mac_offset(skb); | |
263 | ret = 0; | |
264 | } | |
265 | break; | |
266 | case TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK: | |
267 | case TCA_PEDIT_KEY_EX_HDR_TYPE_IP4: | |
268 | case TCA_PEDIT_KEY_EX_HDR_TYPE_IP6: | |
269 | *hoffset = skb_network_offset(skb); | |
270 | ret = 0; | |
271 | break; | |
272 | case TCA_PEDIT_KEY_EX_HDR_TYPE_TCP: | |
273 | case TCA_PEDIT_KEY_EX_HDR_TYPE_UDP: | |
274 | if (skb_transport_header_was_set(skb)) { | |
275 | *hoffset = skb_transport_offset(skb); | |
276 | ret = 0; | |
277 | } | |
278 | break; | |
279 | default: | |
280 | ret = -EINVAL; | |
281 | break; | |
282 | }; | |
283 | ||
284 | return ret; | |
285 | } | |
286 | ||
dc7f9f6e | 287 | static int tcf_pedit(struct sk_buff *skb, const struct tc_action *a, |
e9ce1cd3 | 288 | struct tcf_result *res) |
1da177e4 | 289 | { |
a85a970a | 290 | struct tcf_pedit *p = to_pedit(a); |
4749c3ef | 291 | int i; |
1da177e4 | 292 | |
14bbd6a5 | 293 | if (skb_unclone(skb, GFP_ATOMIC)) |
cc7ec456 | 294 | return p->tcf_action; |
1da177e4 | 295 | |
e9ce1cd3 | 296 | spin_lock(&p->tcf_lock); |
1da177e4 | 297 | |
9c4a4e48 | 298 | tcf_lastuse_update(&p->tcf_tm); |
1da177e4 | 299 | |
e9ce1cd3 DM |
300 | if (p->tcfp_nkeys > 0) { |
301 | struct tc_pedit_key *tkey = p->tcfp_keys; | |
71d0ed70 | 302 | struct tcf_pedit_key_ex *tkey_ex = p->tcfp_keys_ex; |
80f0f574 RM |
303 | enum pedit_header_type htype = |
304 | TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK; | |
853a14ba | 305 | enum pedit_cmd cmd = TCA_PEDIT_KEY_EX_CMD_SET; |
1da177e4 | 306 | |
e9ce1cd3 | 307 | for (i = p->tcfp_nkeys; i > 0; i--, tkey++) { |
544377cd | 308 | u32 *ptr, hdata; |
1da177e4 | 309 | int offset = tkey->off; |
71d0ed70 | 310 | int hoffset; |
853a14ba | 311 | u32 val; |
71d0ed70 AV |
312 | int rc; |
313 | ||
314 | if (tkey_ex) { | |
315 | htype = tkey_ex->htype; | |
853a14ba AV |
316 | cmd = tkey_ex->cmd; |
317 | ||
71d0ed70 AV |
318 | tkey_ex++; |
319 | } | |
320 | ||
321 | rc = pedit_skb_hdr_offset(skb, htype, &hoffset); | |
322 | if (rc) { | |
95b0d2dc | 323 | pr_info("tc action pedit bad header type specified (0x%x)\n", |
71d0ed70 AV |
324 | htype); |
325 | goto bad; | |
326 | } | |
1da177e4 LT |
327 | |
328 | if (tkey->offmask) { | |
43052741 | 329 | u8 *d, _d; |
db2c2417 | 330 | |
71d0ed70 | 331 | if (!offset_valid(skb, hoffset + tkey->at)) { |
95b0d2dc | 332 | pr_info("tc action pedit 'at' offset %d out of bounds\n", |
71d0ed70 | 333 | hoffset + tkey->at); |
95c2027b AV |
334 | goto bad; |
335 | } | |
80f0f574 | 336 | d = skb_header_pointer(skb, hoffset + tkey->at, |
6ff7586e | 337 | sizeof(_d), &_d); |
db2c2417 | 338 | if (!d) |
1da177e4 | 339 | goto bad; |
db2c2417 | 340 | offset += (*d & tkey->offmask) >> tkey->shift; |
1da177e4 LT |
341 | } |
342 | ||
343 | if (offset % 4) { | |
95b0d2dc | 344 | pr_info("tc action pedit offset must be on 32 bit boundaries\n"); |
1da177e4 LT |
345 | goto bad; |
346 | } | |
95c2027b | 347 | |
71d0ed70 | 348 | if (!offset_valid(skb, hoffset + offset)) { |
95b0d2dc | 349 | pr_info("tc action pedit offset %d out of bounds\n", |
71d0ed70 | 350 | hoffset + offset); |
1da177e4 LT |
351 | goto bad; |
352 | } | |
353 | ||
80f0f574 | 354 | ptr = skb_header_pointer(skb, hoffset + offset, |
6ff7586e | 355 | sizeof(hdata), &hdata); |
db2c2417 CG |
356 | if (!ptr) |
357 | goto bad; | |
1da177e4 | 358 | /* just do it, baby */ |
853a14ba AV |
359 | switch (cmd) { |
360 | case TCA_PEDIT_KEY_EX_CMD_SET: | |
361 | val = tkey->val; | |
362 | break; | |
363 | case TCA_PEDIT_KEY_EX_CMD_ADD: | |
364 | val = (*ptr + tkey->val) & ~tkey->mask; | |
365 | break; | |
366 | default: | |
95b0d2dc | 367 | pr_info("tc action pedit bad command (%d)\n", |
853a14ba AV |
368 | cmd); |
369 | goto bad; | |
370 | } | |
371 | ||
372 | *ptr = ((*ptr & tkey->mask) ^ val); | |
544377cd | 373 | if (ptr == &hdata) |
71d0ed70 | 374 | skb_store_bits(skb, hoffset + offset, ptr, 4); |
1da177e4 | 375 | } |
10297b99 | 376 | |
1da177e4 | 377 | goto done; |
80f0f574 | 378 | } else { |
6ff9c364 | 379 | WARN(1, "pedit BUG: index %d\n", p->tcf_index); |
80f0f574 | 380 | } |
1da177e4 LT |
381 | |
382 | bad: | |
e9ce1cd3 | 383 | p->tcf_qstats.overlimits++; |
1da177e4 | 384 | done: |
bfe0d029 | 385 | bstats_update(&p->tcf_bstats, skb); |
e9ce1cd3 DM |
386 | spin_unlock(&p->tcf_lock); |
387 | return p->tcf_action; | |
1da177e4 LT |
388 | } |
389 | ||
e9ce1cd3 DM |
390 | static int tcf_pedit_dump(struct sk_buff *skb, struct tc_action *a, |
391 | int bind, int ref) | |
1da177e4 | 392 | { |
27a884dc | 393 | unsigned char *b = skb_tail_pointer(skb); |
a85a970a | 394 | struct tcf_pedit *p = to_pedit(a); |
1da177e4 | 395 | struct tc_pedit *opt; |
1da177e4 | 396 | struct tcf_t t; |
10297b99 YH |
397 | int s; |
398 | ||
e9ce1cd3 | 399 | s = sizeof(*opt) + p->tcfp_nkeys * sizeof(struct tc_pedit_key); |
1da177e4 LT |
400 | |
401 | /* netlink spinlocks held above us - must use ATOMIC */ | |
0da974f4 | 402 | opt = kzalloc(s, GFP_ATOMIC); |
e9ce1cd3 | 403 | if (unlikely(!opt)) |
1da177e4 | 404 | return -ENOBUFS; |
1da177e4 | 405 | |
e9ce1cd3 DM |
406 | memcpy(opt->keys, p->tcfp_keys, |
407 | p->tcfp_nkeys * sizeof(struct tc_pedit_key)); | |
408 | opt->index = p->tcf_index; | |
409 | opt->nkeys = p->tcfp_nkeys; | |
410 | opt->flags = p->tcfp_flags; | |
411 | opt->action = p->tcf_action; | |
412 | opt->refcnt = p->tcf_refcnt - ref; | |
413 | opt->bindcnt = p->tcf_bindcnt - bind; | |
1da177e4 | 414 | |
71d0ed70 AV |
415 | if (p->tcfp_keys_ex) { |
416 | tcf_pedit_key_ex_dump(skb, p->tcfp_keys_ex, p->tcfp_nkeys); | |
417 | ||
418 | if (nla_put(skb, TCA_PEDIT_PARMS_EX, s, opt)) | |
419 | goto nla_put_failure; | |
420 | } else { | |
421 | if (nla_put(skb, TCA_PEDIT_PARMS, s, opt)) | |
422 | goto nla_put_failure; | |
423 | } | |
48d8ee16 JHS |
424 | |
425 | tcf_tm_dump(&t, &p->tcf_tm); | |
9854518e | 426 | if (nla_put_64bit(skb, TCA_PEDIT_TM, sizeof(t), &t, TCA_PEDIT_PAD)) |
1b34ec43 | 427 | goto nla_put_failure; |
48d8ee16 | 428 | |
541673c8 | 429 | kfree(opt); |
1da177e4 LT |
430 | return skb->len; |
431 | ||
7ba699c6 | 432 | nla_put_failure: |
dc5fc579 | 433 | nlmsg_trim(skb, b); |
541673c8 | 434 | kfree(opt); |
1da177e4 LT |
435 | return -1; |
436 | } | |
437 | ||
ddf97ccd WC |
438 | static int tcf_pedit_walker(struct net *net, struct sk_buff *skb, |
439 | struct netlink_callback *cb, int type, | |
41780105 AA |
440 | const struct tc_action_ops *ops, |
441 | struct netlink_ext_ack *extack) | |
ddf97ccd WC |
442 | { |
443 | struct tc_action_net *tn = net_generic(net, pedit_net_id); | |
444 | ||
b3620145 | 445 | return tcf_generic_walker(tn, skb, cb, type, ops, extack); |
ddf97ccd WC |
446 | } |
447 | ||
331a9295 AA |
448 | static int tcf_pedit_search(struct net *net, struct tc_action **a, u32 index, |
449 | struct netlink_ext_ack *extack) | |
ddf97ccd WC |
450 | { |
451 | struct tc_action_net *tn = net_generic(net, pedit_net_id); | |
452 | ||
65a206c0 | 453 | return tcf_idr_search(tn, a, index); |
ddf97ccd WC |
454 | } |
455 | ||
e9ce1cd3 | 456 | static struct tc_action_ops act_pedit_ops = { |
1da177e4 LT |
457 | .kind = "pedit", |
458 | .type = TCA_ACT_PEDIT, | |
1da177e4 LT |
459 | .owner = THIS_MODULE, |
460 | .act = tcf_pedit, | |
461 | .dump = tcf_pedit_dump, | |
462 | .cleanup = tcf_pedit_cleanup, | |
1da177e4 | 463 | .init = tcf_pedit_init, |
ddf97ccd WC |
464 | .walk = tcf_pedit_walker, |
465 | .lookup = tcf_pedit_search, | |
a85a970a | 466 | .size = sizeof(struct tcf_pedit), |
ddf97ccd WC |
467 | }; |
468 | ||
469 | static __net_init int pedit_init_net(struct net *net) | |
470 | { | |
471 | struct tc_action_net *tn = net_generic(net, pedit_net_id); | |
472 | ||
c7e460ce | 473 | return tc_action_net_init(tn, &act_pedit_ops); |
ddf97ccd WC |
474 | } |
475 | ||
039af9c6 | 476 | static void __net_exit pedit_exit_net(struct list_head *net_list) |
ddf97ccd | 477 | { |
039af9c6 | 478 | tc_action_net_exit(net_list, pedit_net_id); |
ddf97ccd WC |
479 | } |
480 | ||
481 | static struct pernet_operations pedit_net_ops = { | |
482 | .init = pedit_init_net, | |
039af9c6 | 483 | .exit_batch = pedit_exit_net, |
ddf97ccd WC |
484 | .id = &pedit_net_id, |
485 | .size = sizeof(struct tc_action_net), | |
1da177e4 LT |
486 | }; |
487 | ||
488 | MODULE_AUTHOR("Jamal Hadi Salim(2002-4)"); | |
489 | MODULE_DESCRIPTION("Generic Packet Editor actions"); | |
490 | MODULE_LICENSE("GPL"); | |
491 | ||
e9ce1cd3 | 492 | static int __init pedit_init_module(void) |
1da177e4 | 493 | { |
ddf97ccd | 494 | return tcf_register_action(&act_pedit_ops, &pedit_net_ops); |
1da177e4 LT |
495 | } |
496 | ||
e9ce1cd3 | 497 | static void __exit pedit_cleanup_module(void) |
1da177e4 | 498 | { |
ddf97ccd | 499 | tcf_unregister_action(&act_pedit_ops, &pedit_net_ops); |
1da177e4 LT |
500 | } |
501 | ||
502 | module_init(pedit_init_module); | |
503 | module_exit(pedit_cleanup_module); | |
504 |