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Commit | Line | Data |
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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 | 2 | /* |
0c6965dd | 3 | * net/sched/act_pedit.c Generic packet editor |
1da177e4 | 4 | * |
1da177e4 LT |
5 | * Authors: Jamal Hadi Salim (2002-4) |
6 | */ | |
7 | ||
1da177e4 LT |
8 | #include <linux/types.h> |
9 | #include <linux/kernel.h> | |
1da177e4 | 10 | #include <linux/string.h> |
1da177e4 | 11 | #include <linux/errno.h> |
1da177e4 LT |
12 | #include <linux/skbuff.h> |
13 | #include <linux/rtnetlink.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/init.h> | |
5a0e3ad6 | 16 | #include <linux/slab.h> |
dc5fc579 | 17 | #include <net/netlink.h> |
1da177e4 LT |
18 | #include <net/pkt_sched.h> |
19 | #include <linux/tc_act/tc_pedit.h> | |
20 | #include <net/tc_act/tc_pedit.h> | |
71d0ed70 | 21 | #include <uapi/linux/tc_act/tc_pedit.h> |
6ac86ca3 | 22 | #include <net/pkt_cls.h> |
1da177e4 | 23 | |
c7d03a00 | 24 | static unsigned int pedit_net_id; |
a85a970a | 25 | static struct tc_action_ops act_pedit_ops; |
ddf97ccd | 26 | |
53b2bf3f | 27 | static const struct nla_policy pedit_policy[TCA_PEDIT_MAX + 1] = { |
53f7e35f | 28 | [TCA_PEDIT_PARMS] = { .len = sizeof(struct tc_pedit) }, |
71d0ed70 | 29 | [TCA_PEDIT_KEYS_EX] = { .type = NLA_NESTED }, |
53b2bf3f PM |
30 | }; |
31 | ||
71d0ed70 AV |
32 | static const struct nla_policy pedit_key_ex_policy[TCA_PEDIT_KEY_EX_MAX + 1] = { |
33 | [TCA_PEDIT_KEY_EX_HTYPE] = { .type = NLA_U16 }, | |
853a14ba | 34 | [TCA_PEDIT_KEY_EX_CMD] = { .type = NLA_U16 }, |
71d0ed70 AV |
35 | }; |
36 | ||
37 | static struct tcf_pedit_key_ex *tcf_pedit_keys_ex_parse(struct nlattr *nla, | |
38 | u8 n) | |
39 | { | |
40 | struct tcf_pedit_key_ex *keys_ex; | |
41 | struct tcf_pedit_key_ex *k; | |
42 | const struct nlattr *ka; | |
43 | int err = -EINVAL; | |
44 | int rem; | |
45 | ||
46 | if (!nla || !n) | |
47 | return NULL; | |
48 | ||
49 | keys_ex = kcalloc(n, sizeof(*k), GFP_KERNEL); | |
50 | if (!keys_ex) | |
51 | return ERR_PTR(-ENOMEM); | |
52 | ||
53 | k = keys_ex; | |
54 | ||
55 | nla_for_each_nested(ka, nla, rem) { | |
56 | struct nlattr *tb[TCA_PEDIT_KEY_EX_MAX + 1]; | |
57 | ||
58 | if (!n) { | |
59 | err = -EINVAL; | |
60 | goto err_out; | |
61 | } | |
62 | n--; | |
63 | ||
64 | if (nla_type(ka) != TCA_PEDIT_KEY_EX) { | |
65 | err = -EINVAL; | |
66 | goto err_out; | |
67 | } | |
68 | ||
8cb08174 JB |
69 | err = nla_parse_nested_deprecated(tb, TCA_PEDIT_KEY_EX_MAX, |
70 | ka, pedit_key_ex_policy, | |
71 | NULL); | |
71d0ed70 AV |
72 | if (err) |
73 | goto err_out; | |
74 | ||
853a14ba AV |
75 | if (!tb[TCA_PEDIT_KEY_EX_HTYPE] || |
76 | !tb[TCA_PEDIT_KEY_EX_CMD]) { | |
71d0ed70 AV |
77 | err = -EINVAL; |
78 | goto err_out; | |
79 | } | |
80 | ||
81 | k->htype = nla_get_u16(tb[TCA_PEDIT_KEY_EX_HTYPE]); | |
853a14ba | 82 | k->cmd = nla_get_u16(tb[TCA_PEDIT_KEY_EX_CMD]); |
71d0ed70 | 83 | |
853a14ba AV |
84 | if (k->htype > TCA_PEDIT_HDR_TYPE_MAX || |
85 | k->cmd > TCA_PEDIT_CMD_MAX) { | |
71d0ed70 AV |
86 | err = -EINVAL; |
87 | goto err_out; | |
88 | } | |
89 | ||
90 | k++; | |
91 | } | |
92 | ||
c4f65b09 DC |
93 | if (n) { |
94 | err = -EINVAL; | |
71d0ed70 | 95 | goto err_out; |
c4f65b09 | 96 | } |
71d0ed70 AV |
97 | |
98 | return keys_ex; | |
99 | ||
100 | err_out: | |
101 | kfree(keys_ex); | |
102 | return ERR_PTR(err); | |
103 | } | |
104 | ||
105 | static int tcf_pedit_key_ex_dump(struct sk_buff *skb, | |
106 | struct tcf_pedit_key_ex *keys_ex, int n) | |
107 | { | |
ae0be8de MK |
108 | struct nlattr *keys_start = nla_nest_start_noflag(skb, |
109 | TCA_PEDIT_KEYS_EX); | |
71d0ed70 | 110 | |
85eb9af1 DC |
111 | if (!keys_start) |
112 | goto nla_failure; | |
71d0ed70 AV |
113 | for (; n > 0; n--) { |
114 | struct nlattr *key_start; | |
115 | ||
ae0be8de | 116 | key_start = nla_nest_start_noflag(skb, TCA_PEDIT_KEY_EX); |
85eb9af1 DC |
117 | if (!key_start) |
118 | goto nla_failure; | |
71d0ed70 | 119 | |
853a14ba | 120 | if (nla_put_u16(skb, TCA_PEDIT_KEY_EX_HTYPE, keys_ex->htype) || |
85eb9af1 DC |
121 | nla_put_u16(skb, TCA_PEDIT_KEY_EX_CMD, keys_ex->cmd)) |
122 | goto nla_failure; | |
71d0ed70 AV |
123 | |
124 | nla_nest_end(skb, key_start); | |
125 | ||
126 | keys_ex++; | |
127 | } | |
128 | ||
129 | nla_nest_end(skb, keys_start); | |
130 | ||
131 | return 0; | |
85eb9af1 DC |
132 | nla_failure: |
133 | nla_nest_cancel(skb, keys_start); | |
134 | return -EINVAL; | |
71d0ed70 AV |
135 | } |
136 | ||
c1b52739 | 137 | static int tcf_pedit_init(struct net *net, struct nlattr *nla, |
a85a970a | 138 | struct nlattr *est, struct tc_action **a, |
789871bb | 139 | int ovr, int bind, bool rtnl_held, |
85d0966f | 140 | struct tcf_proto *tp, struct netlink_ext_ack *extack) |
1da177e4 | 141 | { |
ddf97ccd | 142 | struct tc_action_net *tn = net_generic(net, pedit_net_id); |
7ba699c6 | 143 | struct nlattr *tb[TCA_PEDIT_MAX + 1]; |
6ac86ca3 | 144 | struct tcf_chain *goto_ch = NULL; |
1da177e4 | 145 | struct tc_pedit_key *keys = NULL; |
71d0ed70 | 146 | struct tcf_pedit_key_ex *keys_ex; |
80f0f574 RM |
147 | struct tc_pedit *parm; |
148 | struct nlattr *pattr; | |
149 | struct tcf_pedit *p; | |
150 | int ret = 0, err; | |
1da177e4 | 151 | int ksize; |
7be8ef2c | 152 | u32 index; |
1da177e4 | 153 | |
9868c0b2 RM |
154 | if (!nla) { |
155 | NL_SET_ERR_MSG_MOD(extack, "Pedit requires attributes to be passed"); | |
1da177e4 | 156 | return -EINVAL; |
9868c0b2 | 157 | } |
1da177e4 | 158 | |
8cb08174 JB |
159 | err = nla_parse_nested_deprecated(tb, TCA_PEDIT_MAX, nla, |
160 | pedit_policy, NULL); | |
cee63723 PM |
161 | if (err < 0) |
162 | return err; | |
163 | ||
71d0ed70 AV |
164 | pattr = tb[TCA_PEDIT_PARMS]; |
165 | if (!pattr) | |
166 | pattr = tb[TCA_PEDIT_PARMS_EX]; | |
9868c0b2 RM |
167 | if (!pattr) { |
168 | NL_SET_ERR_MSG_MOD(extack, "Missing required TCA_PEDIT_PARMS or TCA_PEDIT_PARMS_EX pedit attribute"); | |
1da177e4 | 169 | return -EINVAL; |
9868c0b2 | 170 | } |
71d0ed70 AV |
171 | |
172 | parm = nla_data(pattr); | |
1da177e4 | 173 | ksize = parm->nkeys * sizeof(struct tc_pedit_key); |
9868c0b2 RM |
174 | if (nla_len(pattr) < sizeof(*parm) + ksize) { |
175 | NL_SET_ERR_MSG_ATTR(extack, pattr, "Length of TCA_PEDIT_PARMS or TCA_PEDIT_PARMS_EX pedit attribute is invalid"); | |
1da177e4 | 176 | return -EINVAL; |
9868c0b2 | 177 | } |
1da177e4 | 178 | |
71d0ed70 AV |
179 | keys_ex = tcf_pedit_keys_ex_parse(tb[TCA_PEDIT_KEYS_EX], parm->nkeys); |
180 | if (IS_ERR(keys_ex)) | |
181 | return PTR_ERR(keys_ex); | |
182 | ||
7be8ef2c DL |
183 | index = parm->index; |
184 | err = tcf_idr_check_alloc(tn, &index, a, bind); | |
0190c1d4 | 185 | if (!err) { |
9868c0b2 | 186 | if (!parm->nkeys) { |
7be8ef2c | 187 | tcf_idr_cleanup(tn, index); |
9868c0b2 | 188 | NL_SET_ERR_MSG_MOD(extack, "Pedit requires keys to be passed"); |
30e99ed6 WY |
189 | ret = -EINVAL; |
190 | goto out_free; | |
9868c0b2 | 191 | } |
7be8ef2c | 192 | ret = tcf_idr_create(tn, index, est, a, |
65a206c0 | 193 | &act_pedit_ops, bind, false); |
0190c1d4 | 194 | if (ret) { |
7be8ef2c | 195 | tcf_idr_cleanup(tn, index); |
30e99ed6 | 196 | goto out_free; |
0190c1d4 | 197 | } |
1da177e4 | 198 | ret = ACT_P_CREATED; |
0190c1d4 | 199 | } else if (err > 0) { |
1a29321e | 200 | if (bind) |
30e99ed6 | 201 | goto out_free; |
30e99ed6 WY |
202 | if (!ovr) { |
203 | ret = -EEXIST; | |
67b0c1a3 | 204 | goto out_release; |
1da177e4 | 205 | } |
0190c1d4 | 206 | } else { |
19ab6910 DC |
207 | ret = err; |
208 | goto out_free; | |
1da177e4 LT |
209 | } |
210 | ||
6ac86ca3 DC |
211 | err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack); |
212 | if (err < 0) { | |
213 | ret = err; | |
214 | goto out_release; | |
215 | } | |
67b0c1a3 | 216 | p = to_pedit(*a); |
e9ce1cd3 | 217 | spin_lock_bh(&p->tcf_lock); |
67b0c1a3 VB |
218 | |
219 | if (ret == ACT_P_CREATED || | |
220 | (p->tcfp_nkeys && p->tcfp_nkeys != parm->nkeys)) { | |
221 | keys = kmalloc(ksize, GFP_ATOMIC); | |
222 | if (!keys) { | |
223 | spin_unlock_bh(&p->tcf_lock); | |
224 | ret = -ENOMEM; | |
6ac86ca3 | 225 | goto put_chain; |
67b0c1a3 | 226 | } |
e9ce1cd3 DM |
227 | kfree(p->tcfp_keys); |
228 | p->tcfp_keys = keys; | |
229 | p->tcfp_nkeys = parm->nkeys; | |
1da177e4 | 230 | } |
e9ce1cd3 | 231 | memcpy(p->tcfp_keys, parm->keys, ksize); |
71d0ed70 | 232 | |
67b0c1a3 | 233 | p->tcfp_flags = parm->flags; |
6ac86ca3 | 234 | goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch); |
67b0c1a3 | 235 | |
71d0ed70 AV |
236 | kfree(p->tcfp_keys_ex); |
237 | p->tcfp_keys_ex = keys_ex; | |
238 | ||
e9ce1cd3 | 239 | spin_unlock_bh(&p->tcf_lock); |
6ac86ca3 DC |
240 | if (goto_ch) |
241 | tcf_chain_put_by_act(goto_ch); | |
1da177e4 | 242 | if (ret == ACT_P_CREATED) |
65a206c0 | 243 | tcf_idr_insert(tn, *a); |
1da177e4 | 244 | return ret; |
67b0c1a3 | 245 | |
6ac86ca3 DC |
246 | put_chain: |
247 | if (goto_ch) | |
248 | tcf_chain_put_by_act(goto_ch); | |
67b0c1a3 VB |
249 | out_release: |
250 | tcf_idr_release(*a, bind); | |
30e99ed6 WY |
251 | out_free: |
252 | kfree(keys_ex); | |
253 | return ret; | |
254 | ||
1da177e4 LT |
255 | } |
256 | ||
9a63b255 | 257 | static void tcf_pedit_cleanup(struct tc_action *a) |
1da177e4 | 258 | { |
a85a970a | 259 | struct tcf_pedit *p = to_pedit(a); |
a5b5c958 | 260 | struct tc_pedit_key *keys = p->tcfp_keys; |
80f0f574 | 261 | |
a5b5c958 | 262 | kfree(keys); |
71d0ed70 | 263 | kfree(p->tcfp_keys_ex); |
1da177e4 LT |
264 | } |
265 | ||
95c2027b AV |
266 | static bool offset_valid(struct sk_buff *skb, int offset) |
267 | { | |
268 | if (offset > 0 && offset > skb->len) | |
269 | return false; | |
270 | ||
271 | if (offset < 0 && -offset > skb_headroom(skb)) | |
272 | return false; | |
273 | ||
274 | return true; | |
275 | } | |
276 | ||
71d0ed70 AV |
277 | static int pedit_skb_hdr_offset(struct sk_buff *skb, |
278 | enum pedit_header_type htype, int *hoffset) | |
279 | { | |
280 | int ret = -EINVAL; | |
281 | ||
282 | switch (htype) { | |
283 | case TCA_PEDIT_KEY_EX_HDR_TYPE_ETH: | |
284 | if (skb_mac_header_was_set(skb)) { | |
285 | *hoffset = skb_mac_offset(skb); | |
286 | ret = 0; | |
287 | } | |
288 | break; | |
289 | case TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK: | |
290 | case TCA_PEDIT_KEY_EX_HDR_TYPE_IP4: | |
291 | case TCA_PEDIT_KEY_EX_HDR_TYPE_IP6: | |
292 | *hoffset = skb_network_offset(skb); | |
293 | ret = 0; | |
294 | break; | |
295 | case TCA_PEDIT_KEY_EX_HDR_TYPE_TCP: | |
296 | case TCA_PEDIT_KEY_EX_HDR_TYPE_UDP: | |
297 | if (skb_transport_header_was_set(skb)) { | |
298 | *hoffset = skb_transport_offset(skb); | |
299 | ret = 0; | |
300 | } | |
301 | break; | |
302 | default: | |
303 | ret = -EINVAL; | |
304 | break; | |
0a80848e | 305 | } |
71d0ed70 AV |
306 | |
307 | return ret; | |
308 | } | |
309 | ||
6a2b401c JHS |
310 | static int tcf_pedit_act(struct sk_buff *skb, const struct tc_action *a, |
311 | struct tcf_result *res) | |
1da177e4 | 312 | { |
a85a970a | 313 | struct tcf_pedit *p = to_pedit(a); |
4749c3ef | 314 | int i; |
1da177e4 | 315 | |
14bbd6a5 | 316 | if (skb_unclone(skb, GFP_ATOMIC)) |
cc7ec456 | 317 | return p->tcf_action; |
1da177e4 | 318 | |
e9ce1cd3 | 319 | spin_lock(&p->tcf_lock); |
1da177e4 | 320 | |
9c4a4e48 | 321 | tcf_lastuse_update(&p->tcf_tm); |
1da177e4 | 322 | |
e9ce1cd3 DM |
323 | if (p->tcfp_nkeys > 0) { |
324 | struct tc_pedit_key *tkey = p->tcfp_keys; | |
71d0ed70 | 325 | struct tcf_pedit_key_ex *tkey_ex = p->tcfp_keys_ex; |
80f0f574 RM |
326 | enum pedit_header_type htype = |
327 | TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK; | |
853a14ba | 328 | enum pedit_cmd cmd = TCA_PEDIT_KEY_EX_CMD_SET; |
1da177e4 | 329 | |
e9ce1cd3 | 330 | for (i = p->tcfp_nkeys; i > 0; i--, tkey++) { |
544377cd | 331 | u32 *ptr, hdata; |
1da177e4 | 332 | int offset = tkey->off; |
71d0ed70 | 333 | int hoffset; |
853a14ba | 334 | u32 val; |
71d0ed70 AV |
335 | int rc; |
336 | ||
337 | if (tkey_ex) { | |
338 | htype = tkey_ex->htype; | |
853a14ba AV |
339 | cmd = tkey_ex->cmd; |
340 | ||
71d0ed70 AV |
341 | tkey_ex++; |
342 | } | |
343 | ||
344 | rc = pedit_skb_hdr_offset(skb, htype, &hoffset); | |
345 | if (rc) { | |
95b0d2dc | 346 | pr_info("tc action pedit bad header type specified (0x%x)\n", |
71d0ed70 AV |
347 | htype); |
348 | goto bad; | |
349 | } | |
1da177e4 LT |
350 | |
351 | if (tkey->offmask) { | |
43052741 | 352 | u8 *d, _d; |
db2c2417 | 353 | |
71d0ed70 | 354 | if (!offset_valid(skb, hoffset + tkey->at)) { |
95b0d2dc | 355 | pr_info("tc action pedit 'at' offset %d out of bounds\n", |
71d0ed70 | 356 | hoffset + tkey->at); |
95c2027b AV |
357 | goto bad; |
358 | } | |
80f0f574 | 359 | d = skb_header_pointer(skb, hoffset + tkey->at, |
6ff7586e | 360 | sizeof(_d), &_d); |
db2c2417 | 361 | if (!d) |
1da177e4 | 362 | goto bad; |
db2c2417 | 363 | offset += (*d & tkey->offmask) >> tkey->shift; |
1da177e4 LT |
364 | } |
365 | ||
366 | if (offset % 4) { | |
95b0d2dc | 367 | pr_info("tc action pedit offset must be on 32 bit boundaries\n"); |
1da177e4 LT |
368 | goto bad; |
369 | } | |
95c2027b | 370 | |
71d0ed70 | 371 | if (!offset_valid(skb, hoffset + offset)) { |
95b0d2dc | 372 | pr_info("tc action pedit offset %d out of bounds\n", |
71d0ed70 | 373 | hoffset + offset); |
1da177e4 LT |
374 | goto bad; |
375 | } | |
376 | ||
80f0f574 | 377 | ptr = skb_header_pointer(skb, hoffset + offset, |
6ff7586e | 378 | sizeof(hdata), &hdata); |
db2c2417 CG |
379 | if (!ptr) |
380 | goto bad; | |
1da177e4 | 381 | /* just do it, baby */ |
853a14ba AV |
382 | switch (cmd) { |
383 | case TCA_PEDIT_KEY_EX_CMD_SET: | |
384 | val = tkey->val; | |
385 | break; | |
386 | case TCA_PEDIT_KEY_EX_CMD_ADD: | |
387 | val = (*ptr + tkey->val) & ~tkey->mask; | |
388 | break; | |
389 | default: | |
95b0d2dc | 390 | pr_info("tc action pedit bad command (%d)\n", |
853a14ba AV |
391 | cmd); |
392 | goto bad; | |
393 | } | |
394 | ||
395 | *ptr = ((*ptr & tkey->mask) ^ val); | |
544377cd | 396 | if (ptr == &hdata) |
71d0ed70 | 397 | skb_store_bits(skb, hoffset + offset, ptr, 4); |
1da177e4 | 398 | } |
10297b99 | 399 | |
1da177e4 | 400 | goto done; |
80f0f574 | 401 | } else { |
6ff9c364 | 402 | WARN(1, "pedit BUG: index %d\n", p->tcf_index); |
80f0f574 | 403 | } |
1da177e4 LT |
404 | |
405 | bad: | |
e9ce1cd3 | 406 | p->tcf_qstats.overlimits++; |
1da177e4 | 407 | done: |
bfe0d029 | 408 | bstats_update(&p->tcf_bstats, skb); |
e9ce1cd3 DM |
409 | spin_unlock(&p->tcf_lock); |
410 | return p->tcf_action; | |
1da177e4 LT |
411 | } |
412 | ||
e9ce1cd3 DM |
413 | static int tcf_pedit_dump(struct sk_buff *skb, struct tc_action *a, |
414 | int bind, int ref) | |
1da177e4 | 415 | { |
27a884dc | 416 | unsigned char *b = skb_tail_pointer(skb); |
a85a970a | 417 | struct tcf_pedit *p = to_pedit(a); |
1da177e4 | 418 | struct tc_pedit *opt; |
1da177e4 | 419 | struct tcf_t t; |
10297b99 YH |
420 | int s; |
421 | ||
8fe5756c | 422 | s = struct_size(opt, keys, p->tcfp_nkeys); |
1da177e4 LT |
423 | |
424 | /* netlink spinlocks held above us - must use ATOMIC */ | |
0da974f4 | 425 | opt = kzalloc(s, GFP_ATOMIC); |
e9ce1cd3 | 426 | if (unlikely(!opt)) |
1da177e4 | 427 | return -ENOBUFS; |
1da177e4 | 428 | |
67b0c1a3 | 429 | spin_lock_bh(&p->tcf_lock); |
e9ce1cd3 DM |
430 | memcpy(opt->keys, p->tcfp_keys, |
431 | p->tcfp_nkeys * sizeof(struct tc_pedit_key)); | |
432 | opt->index = p->tcf_index; | |
433 | opt->nkeys = p->tcfp_nkeys; | |
434 | opt->flags = p->tcfp_flags; | |
435 | opt->action = p->tcf_action; | |
036bb443 VB |
436 | opt->refcnt = refcount_read(&p->tcf_refcnt) - ref; |
437 | opt->bindcnt = atomic_read(&p->tcf_bindcnt) - bind; | |
1da177e4 | 438 | |
71d0ed70 | 439 | if (p->tcfp_keys_ex) { |
85eb9af1 DC |
440 | if (tcf_pedit_key_ex_dump(skb, |
441 | p->tcfp_keys_ex, | |
442 | p->tcfp_nkeys)) | |
443 | goto nla_put_failure; | |
71d0ed70 AV |
444 | |
445 | if (nla_put(skb, TCA_PEDIT_PARMS_EX, s, opt)) | |
446 | goto nla_put_failure; | |
447 | } else { | |
448 | if (nla_put(skb, TCA_PEDIT_PARMS, s, opt)) | |
449 | goto nla_put_failure; | |
450 | } | |
48d8ee16 JHS |
451 | |
452 | tcf_tm_dump(&t, &p->tcf_tm); | |
9854518e | 453 | if (nla_put_64bit(skb, TCA_PEDIT_TM, sizeof(t), &t, TCA_PEDIT_PAD)) |
1b34ec43 | 454 | goto nla_put_failure; |
67b0c1a3 | 455 | spin_unlock_bh(&p->tcf_lock); |
48d8ee16 | 456 | |
541673c8 | 457 | kfree(opt); |
1da177e4 LT |
458 | return skb->len; |
459 | ||
7ba699c6 | 460 | nla_put_failure: |
67b0c1a3 | 461 | spin_unlock_bh(&p->tcf_lock); |
dc5fc579 | 462 | nlmsg_trim(skb, b); |
541673c8 | 463 | kfree(opt); |
1da177e4 LT |
464 | return -1; |
465 | } | |
466 | ||
ddf97ccd WC |
467 | static int tcf_pedit_walker(struct net *net, struct sk_buff *skb, |
468 | struct netlink_callback *cb, int type, | |
41780105 AA |
469 | const struct tc_action_ops *ops, |
470 | struct netlink_ext_ack *extack) | |
ddf97ccd WC |
471 | { |
472 | struct tc_action_net *tn = net_generic(net, pedit_net_id); | |
473 | ||
b3620145 | 474 | return tcf_generic_walker(tn, skb, cb, type, ops, extack); |
ddf97ccd WC |
475 | } |
476 | ||
f061b48c | 477 | static int tcf_pedit_search(struct net *net, struct tc_action **a, u32 index) |
ddf97ccd WC |
478 | { |
479 | struct tc_action_net *tn = net_generic(net, pedit_net_id); | |
480 | ||
65a206c0 | 481 | return tcf_idr_search(tn, a, index); |
ddf97ccd WC |
482 | } |
483 | ||
e9ce1cd3 | 484 | static struct tc_action_ops act_pedit_ops = { |
1da177e4 | 485 | .kind = "pedit", |
eddd2cf1 | 486 | .id = TCA_ID_PEDIT, |
1da177e4 | 487 | .owner = THIS_MODULE, |
6a2b401c | 488 | .act = tcf_pedit_act, |
1da177e4 LT |
489 | .dump = tcf_pedit_dump, |
490 | .cleanup = tcf_pedit_cleanup, | |
1da177e4 | 491 | .init = tcf_pedit_init, |
ddf97ccd WC |
492 | .walk = tcf_pedit_walker, |
493 | .lookup = tcf_pedit_search, | |
a85a970a | 494 | .size = sizeof(struct tcf_pedit), |
ddf97ccd WC |
495 | }; |
496 | ||
497 | static __net_init int pedit_init_net(struct net *net) | |
498 | { | |
499 | struct tc_action_net *tn = net_generic(net, pedit_net_id); | |
500 | ||
981471bd | 501 | return tc_action_net_init(net, tn, &act_pedit_ops); |
ddf97ccd WC |
502 | } |
503 | ||
039af9c6 | 504 | static void __net_exit pedit_exit_net(struct list_head *net_list) |
ddf97ccd | 505 | { |
039af9c6 | 506 | tc_action_net_exit(net_list, pedit_net_id); |
ddf97ccd WC |
507 | } |
508 | ||
509 | static struct pernet_operations pedit_net_ops = { | |
510 | .init = pedit_init_net, | |
039af9c6 | 511 | .exit_batch = pedit_exit_net, |
ddf97ccd WC |
512 | .id = &pedit_net_id, |
513 | .size = sizeof(struct tc_action_net), | |
1da177e4 LT |
514 | }; |
515 | ||
516 | MODULE_AUTHOR("Jamal Hadi Salim(2002-4)"); | |
517 | MODULE_DESCRIPTION("Generic Packet Editor actions"); | |
518 | MODULE_LICENSE("GPL"); | |
519 | ||
e9ce1cd3 | 520 | static int __init pedit_init_module(void) |
1da177e4 | 521 | { |
ddf97ccd | 522 | return tcf_register_action(&act_pedit_ops, &pedit_net_ops); |
1da177e4 LT |
523 | } |
524 | ||
e9ce1cd3 | 525 | static void __exit pedit_cleanup_module(void) |
1da177e4 | 526 | { |
ddf97ccd | 527 | tcf_unregister_action(&act_pedit_ops, &pedit_net_ops); |
1da177e4 LT |
528 | } |
529 | ||
530 | module_init(pedit_init_module); | |
531 | module_exit(pedit_cleanup_module); |