11539Srgrimes// SPDX-License-Identifier: GPL-2.0-or-later
21539Srgrimes/*
31539Srgrimes * net/sched/act_pedit.c	Generic packet editor
41539Srgrimes *
51539Srgrimes * Authors:	Jamal Hadi Salim (2002-4)
61539Srgrimes */
71539Srgrimes
81539Srgrimes#include <linux/types.h>
91539Srgrimes#include <linux/kernel.h>
101539Srgrimes#include <linux/string.h>
111539Srgrimes#include <linux/errno.h>
121539Srgrimes#include <linux/skbuff.h>
131539Srgrimes#include <linux/rtnetlink.h>
141539Srgrimes#include <linux/module.h>
151539Srgrimes#include <linux/init.h>
161539Srgrimes#include <linux/ip.h>
171539Srgrimes#include <linux/ipv6.h>
181539Srgrimes#include <linux/slab.h>
191539Srgrimes#include <net/ipv6.h>
201539Srgrimes#include <net/netlink.h>
211539Srgrimes#include <net/pkt_sched.h>
221539Srgrimes#include <linux/tc_act/tc_pedit.h>
231539Srgrimes#include <net/tc_act/tc_pedit.h>
241539Srgrimes#include <uapi/linux/tc_act/tc_pedit.h>
251539Srgrimes#include <net/pkt_cls.h>
261539Srgrimes#include <net/tc_wrapper.h>
271539Srgrimes
281539Srgrimesstatic struct tc_action_ops act_pedit_ops;
291539Srgrimes
301539Srgrimesstatic const struct nla_policy pedit_policy[TCA_PEDIT_MAX + 1] = {
311539Srgrimes	[TCA_PEDIT_PARMS]	= { .len = sizeof(struct tc_pedit) },
321539Srgrimes	[TCA_PEDIT_PARMS_EX]	= { .len = sizeof(struct tc_pedit) },
3339112Swollman	[TCA_PEDIT_KEYS_EX]   = { .type = NLA_NESTED },
3440739Sjdp};
351539Srgrimes
361539Srgrimesstatic const struct nla_policy pedit_key_ex_policy[TCA_PEDIT_KEY_EX_MAX + 1] = {
371539Srgrimes	[TCA_PEDIT_KEY_EX_HTYPE] =
381539Srgrimes		NLA_POLICY_MAX(NLA_U16, TCA_PEDIT_HDR_TYPE_MAX),
391539Srgrimes	[TCA_PEDIT_KEY_EX_CMD] = NLA_POLICY_MAX(NLA_U16, TCA_PEDIT_CMD_MAX),
401539Srgrimes};
411539Srgrimes
421539Srgrimesstatic struct tcf_pedit_key_ex *tcf_pedit_keys_ex_parse(struct nlattr *nla,
431539Srgrimes							u8 n, struct netlink_ext_ack *extack)
441539Srgrimes{
451539Srgrimes	struct tcf_pedit_key_ex *keys_ex;
461539Srgrimes	struct tcf_pedit_key_ex *k;
471539Srgrimes	const struct nlattr *ka;
481539Srgrimes	int err = -EINVAL;
491539Srgrimes	int rem;
501539Srgrimes
5140739Sjdp	if (!nla)
5218286Sbde		return NULL;
5340739Sjdp
5439112Swollman	keys_ex = kcalloc(n, sizeof(*k), GFP_KERNEL);
5540739Sjdp	if (!keys_ex)
5618286Sbde		return ERR_PTR(-ENOMEM);
5740739Sjdp
5818286Sbde	k = keys_ex;
5940739Sjdp
6039112Swollman	nla_for_each_nested(ka, nla, rem) {
6140739Sjdp		struct nlattr *tb[TCA_PEDIT_KEY_EX_MAX + 1];
6218286Sbde
6318286Sbde		if (!n) {
6418286Sbde			NL_SET_ERR_MSG_MOD(extack, "Can't parse more extended keys than requested");
651539Srgrimes			err = -EINVAL;
661539Srgrimes			goto err_out;
671539Srgrimes		}
68		n--;
69
70		if (nla_type(ka) != TCA_PEDIT_KEY_EX) {
71			NL_SET_ERR_MSG_ATTR(extack, ka, "Unknown attribute, expected extended key");
72			err = -EINVAL;
73			goto err_out;
74		}
75
76		err = nla_parse_nested_deprecated(tb, TCA_PEDIT_KEY_EX_MAX,
77						  ka, pedit_key_ex_policy,
78						  NULL);
79		if (err)
80			goto err_out;
81
82		if (NL_REQ_ATTR_CHECK(extack, nla, tb, TCA_PEDIT_KEY_EX_HTYPE)) {
83			NL_SET_ERR_MSG(extack, "Missing required attribute");
84			err = -EINVAL;
85			goto err_out;
86		}
87
88		if (NL_REQ_ATTR_CHECK(extack, nla, tb, TCA_PEDIT_KEY_EX_CMD)) {
89			NL_SET_ERR_MSG(extack, "Missing required attribute");
90			err = -EINVAL;
91			goto err_out;
92		}
93
94		k->htype = nla_get_u16(tb[TCA_PEDIT_KEY_EX_HTYPE]);
95		k->cmd = nla_get_u16(tb[TCA_PEDIT_KEY_EX_CMD]);
96
97		k++;
98	}
99
100	if (n) {
101		NL_SET_ERR_MSG_MOD(extack, "Not enough extended keys to parse");
102		err = -EINVAL;
103		goto err_out;
104	}
105
106	return keys_ex;
107
108err_out:
109	kfree(keys_ex);
110	return ERR_PTR(err);
111}
112
113static int tcf_pedit_key_ex_dump(struct sk_buff *skb,
114				 struct tcf_pedit_key_ex *keys_ex, int n)
115{
116	struct nlattr *keys_start = nla_nest_start_noflag(skb,
117							  TCA_PEDIT_KEYS_EX);
118
119	if (!keys_start)
120		goto nla_failure;
121	for (; n > 0; n--) {
122		struct nlattr *key_start;
123
124		key_start = nla_nest_start_noflag(skb, TCA_PEDIT_KEY_EX);
125		if (!key_start)
126			goto nla_failure;
127
128		if (nla_put_u16(skb, TCA_PEDIT_KEY_EX_HTYPE, keys_ex->htype) ||
129		    nla_put_u16(skb, TCA_PEDIT_KEY_EX_CMD, keys_ex->cmd))
130			goto nla_failure;
131
132		nla_nest_end(skb, key_start);
133
134		keys_ex++;
135	}
136
137	nla_nest_end(skb, keys_start);
138
139	return 0;
140nla_failure:
141	nla_nest_cancel(skb, keys_start);
142	return -EINVAL;
143}
144
145static void tcf_pedit_cleanup_rcu(struct rcu_head *head)
146{
147	struct tcf_pedit_parms *parms =
148		container_of(head, struct tcf_pedit_parms, rcu);
149
150	kfree(parms->tcfp_keys_ex);
151	kfree(parms->tcfp_keys);
152
153	kfree(parms);
154}
155
156static int tcf_pedit_init(struct net *net, struct nlattr *nla,
157			  struct nlattr *est, struct tc_action **a,
158			  struct tcf_proto *tp, u32 flags,
159			  struct netlink_ext_ack *extack)
160{
161	struct tc_action_net *tn = net_generic(net, act_pedit_ops.net_id);
162	bool bind = flags & TCA_ACT_FLAGS_BIND;
163	struct tcf_chain *goto_ch = NULL;
164	struct tcf_pedit_parms *oparms, *nparms;
165	struct nlattr *tb[TCA_PEDIT_MAX + 1];
166	struct tc_pedit *parm;
167	struct nlattr *pattr;
168	struct tcf_pedit *p;
169	int ret = 0, err;
170	int i, ksize;
171	u32 index;
172
173	if (!nla) {
174		NL_SET_ERR_MSG_MOD(extack, "Pedit requires attributes to be passed");
175		return -EINVAL;
176	}
177
178	err = nla_parse_nested_deprecated(tb, TCA_PEDIT_MAX, nla,
179					  pedit_policy, NULL);
180	if (err < 0)
181		return err;
182
183	pattr = tb[TCA_PEDIT_PARMS];
184	if (!pattr)
185		pattr = tb[TCA_PEDIT_PARMS_EX];
186	if (!pattr) {
187		NL_SET_ERR_MSG_MOD(extack, "Missing required TCA_PEDIT_PARMS or TCA_PEDIT_PARMS_EX pedit attribute");
188		return -EINVAL;
189	}
190
191	parm = nla_data(pattr);
192
193	index = parm->index;
194	err = tcf_idr_check_alloc(tn, &index, a, bind);
195	if (!err) {
196		ret = tcf_idr_create_from_flags(tn, index, est, a,
197						&act_pedit_ops, bind, flags);
198		if (ret) {
199			tcf_idr_cleanup(tn, index);
200			return ret;
201		}
202		ret = ACT_P_CREATED;
203	} else if (err > 0) {
204		if (bind)
205			return ACT_P_BOUND;
206		if (!(flags & TCA_ACT_FLAGS_REPLACE)) {
207			ret = -EEXIST;
208			goto out_release;
209		}
210	} else {
211		return err;
212	}
213
214	if (!parm->nkeys) {
215		NL_SET_ERR_MSG_MOD(extack, "Pedit requires keys to be passed");
216		ret = -EINVAL;
217		goto out_release;
218	}
219	ksize = parm->nkeys * sizeof(struct tc_pedit_key);
220	if (nla_len(pattr) < sizeof(*parm) + ksize) {
221		NL_SET_ERR_MSG_ATTR(extack, pattr, "Length of TCA_PEDIT_PARMS or TCA_PEDIT_PARMS_EX pedit attribute is invalid");
222		ret = -EINVAL;
223		goto out_release;
224	}
225
226	nparms = kzalloc(sizeof(*nparms), GFP_KERNEL);
227	if (!nparms) {
228		ret = -ENOMEM;
229		goto out_release;
230	}
231
232	nparms->tcfp_keys_ex =
233		tcf_pedit_keys_ex_parse(tb[TCA_PEDIT_KEYS_EX], parm->nkeys, extack);
234	if (IS_ERR(nparms->tcfp_keys_ex)) {
235		ret = PTR_ERR(nparms->tcfp_keys_ex);
236		goto out_free;
237	}
238
239	err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack);
240	if (err < 0) {
241		ret = err;
242		goto out_free_ex;
243	}
244
245	nparms->tcfp_off_max_hint = 0;
246	nparms->tcfp_flags = parm->flags;
247	nparms->tcfp_nkeys = parm->nkeys;
248
249	nparms->tcfp_keys = kmemdup(parm->keys, ksize, GFP_KERNEL);
250	if (!nparms->tcfp_keys) {
251		ret = -ENOMEM;
252		goto put_chain;
253	}
254
255	for (i = 0; i < nparms->tcfp_nkeys; ++i) {
256		u32 offmask = nparms->tcfp_keys[i].offmask;
257		u32 cur = nparms->tcfp_keys[i].off;
258
259		/* The AT option can be added to static offsets in the datapath */
260		if (!offmask && cur % 4) {
261			NL_SET_ERR_MSG_MOD(extack, "Offsets must be on 32bit boundaries");
262			ret = -EINVAL;
263			goto out_free_keys;
264		}
265
266		/* sanitize the shift value for any later use */
267		nparms->tcfp_keys[i].shift = min_t(size_t,
268						   BITS_PER_TYPE(int) - 1,
269						   nparms->tcfp_keys[i].shift);
270
271		/* The AT option can read a single byte, we can bound the actual
272		 * value with uchar max.
273		 */
274		cur += (0xff & offmask) >> nparms->tcfp_keys[i].shift;
275
276		/* Each key touches 4 bytes starting from the computed offset */
277		nparms->tcfp_off_max_hint =
278			max(nparms->tcfp_off_max_hint, cur + 4);
279	}
280
281	p = to_pedit(*a);
282
283	spin_lock_bh(&p->tcf_lock);
284	goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch);
285	oparms = rcu_replace_pointer(p->parms, nparms, 1);
286	spin_unlock_bh(&p->tcf_lock);
287
288	if (oparms)
289		call_rcu(&oparms->rcu, tcf_pedit_cleanup_rcu);
290
291	if (goto_ch)
292		tcf_chain_put_by_act(goto_ch);
293
294	return ret;
295
296out_free_keys:
297	kfree(nparms->tcfp_keys);
298put_chain:
299	if (goto_ch)
300		tcf_chain_put_by_act(goto_ch);
301out_free_ex:
302	kfree(nparms->tcfp_keys_ex);
303out_free:
304	kfree(nparms);
305out_release:
306	tcf_idr_release(*a, bind);
307	return ret;
308}
309
310static void tcf_pedit_cleanup(struct tc_action *a)
311{
312	struct tcf_pedit *p = to_pedit(a);
313	struct tcf_pedit_parms *parms;
314
315	parms = rcu_dereference_protected(p->parms, 1);
316
317	if (parms)
318		call_rcu(&parms->rcu, tcf_pedit_cleanup_rcu);
319}
320
321static bool offset_valid(struct sk_buff *skb, int offset)
322{
323	if (offset > 0 && offset > skb->len)
324		return false;
325
326	if  (offset < 0 && -offset > skb_headroom(skb))
327		return false;
328
329	return true;
330}
331
332static int pedit_l4_skb_offset(struct sk_buff *skb, int *hoffset, const int header_type)
333{
334	const int noff = skb_network_offset(skb);
335	int ret = -EINVAL;
336	struct iphdr _iph;
337
338	switch (skb->protocol) {
339	case htons(ETH_P_IP): {
340		const struct iphdr *iph = skb_header_pointer(skb, noff, sizeof(_iph), &_iph);
341
342		if (!iph)
343			goto out;
344		*hoffset = noff + iph->ihl * 4;
345		ret = 0;
346		break;
347	}
348	case htons(ETH_P_IPV6):
349		ret = ipv6_find_hdr(skb, hoffset, header_type, NULL, NULL) == header_type ? 0 : -EINVAL;
350		break;
351	}
352out:
353	return ret;
354}
355
356static int pedit_skb_hdr_offset(struct sk_buff *skb,
357				 enum pedit_header_type htype, int *hoffset)
358{
359	int ret = -EINVAL;
360	/* 'htype' is validated in the netlink parsing */
361	switch (htype) {
362	case TCA_PEDIT_KEY_EX_HDR_TYPE_ETH:
363		if (skb_mac_header_was_set(skb)) {
364			*hoffset = skb_mac_offset(skb);
365			ret = 0;
366		}
367		break;
368	case TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK:
369	case TCA_PEDIT_KEY_EX_HDR_TYPE_IP4:
370	case TCA_PEDIT_KEY_EX_HDR_TYPE_IP6:
371		*hoffset = skb_network_offset(skb);
372		ret = 0;
373		break;
374	case TCA_PEDIT_KEY_EX_HDR_TYPE_TCP:
375		ret = pedit_l4_skb_offset(skb, hoffset, IPPROTO_TCP);
376		break;
377	case TCA_PEDIT_KEY_EX_HDR_TYPE_UDP:
378		ret = pedit_l4_skb_offset(skb, hoffset, IPPROTO_UDP);
379		break;
380	default:
381		break;
382	}
383	return ret;
384}
385
386TC_INDIRECT_SCOPE int tcf_pedit_act(struct sk_buff *skb,
387				    const struct tc_action *a,
388				    struct tcf_result *res)
389{
390	enum pedit_header_type htype = TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK;
391	enum pedit_cmd cmd = TCA_PEDIT_KEY_EX_CMD_SET;
392	struct tcf_pedit *p = to_pedit(a);
393	struct tcf_pedit_key_ex *tkey_ex;
394	struct tcf_pedit_parms *parms;
395	struct tc_pedit_key *tkey;
396	u32 max_offset;
397	int i;
398
399	parms = rcu_dereference_bh(p->parms);
400
401	max_offset = (skb_transport_header_was_set(skb) ?
402		      skb_transport_offset(skb) :
403		      skb_network_offset(skb)) +
404		     parms->tcfp_off_max_hint;
405	if (skb_ensure_writable(skb, min(skb->len, max_offset)))
406		goto done;
407
408	tcf_lastuse_update(&p->tcf_tm);
409	tcf_action_update_bstats(&p->common, skb);
410
411	tkey = parms->tcfp_keys;
412	tkey_ex = parms->tcfp_keys_ex;
413
414	for (i = parms->tcfp_nkeys; i > 0; i--, tkey++) {
415		int offset = tkey->off;
416		int hoffset = 0;
417		u32 *ptr, hdata;
418		u32 val;
419		int rc;
420
421		if (tkey_ex) {
422			htype = tkey_ex->htype;
423			cmd = tkey_ex->cmd;
424
425			tkey_ex++;
426		}
427
428		rc = pedit_skb_hdr_offset(skb, htype, &hoffset);
429		if (rc) {
430			pr_info_ratelimited("tc action pedit unable to extract header offset for header type (0x%x)\n", htype);
431			goto bad;
432		}
433
434		if (tkey->offmask) {
435			u8 *d, _d;
436
437			if (!offset_valid(skb, hoffset + tkey->at)) {
438				pr_info_ratelimited("tc action pedit 'at' offset %d out of bounds\n",
439						    hoffset + tkey->at);
440				goto bad;
441			}
442			d = skb_header_pointer(skb, hoffset + tkey->at,
443					       sizeof(_d), &_d);
444			if (!d)
445				goto bad;
446
447			offset += (*d & tkey->offmask) >> tkey->shift;
448			if (offset % 4) {
449				pr_info_ratelimited("tc action pedit offset must be on 32 bit boundaries\n");
450				goto bad;
451			}
452		}
453
454		if (!offset_valid(skb, hoffset + offset)) {
455			pr_info_ratelimited("tc action pedit offset %d out of bounds\n", hoffset + offset);
456			goto bad;
457		}
458
459		ptr = skb_header_pointer(skb, hoffset + offset,
460					 sizeof(hdata), &hdata);
461		if (!ptr)
462			goto bad;
463		/* just do it, baby */
464		switch (cmd) {
465		case TCA_PEDIT_KEY_EX_CMD_SET:
466			val = tkey->val;
467			break;
468		case TCA_PEDIT_KEY_EX_CMD_ADD:
469			val = (*ptr + tkey->val) & ~tkey->mask;
470			break;
471		default:
472			pr_info_ratelimited("tc action pedit bad command (%d)\n", cmd);
473			goto bad;
474		}
475
476		*ptr = ((*ptr & tkey->mask) ^ val);
477		if (ptr == &hdata)
478			skb_store_bits(skb, hoffset + offset, ptr, 4);
479	}
480
481	goto done;
482
483bad:
484	tcf_action_inc_overlimit_qstats(&p->common);
485done:
486	return p->tcf_action;
487}
488
489static void tcf_pedit_stats_update(struct tc_action *a, u64 bytes, u64 packets,
490				   u64 drops, u64 lastuse, bool hw)
491{
492	struct tcf_pedit *d = to_pedit(a);
493	struct tcf_t *tm = &d->tcf_tm;
494
495	tcf_action_update_stats(a, bytes, packets, drops, hw);
496	tm->lastuse = max_t(u64, tm->lastuse, lastuse);
497}
498
499static int tcf_pedit_dump(struct sk_buff *skb, struct tc_action *a,
500			  int bind, int ref)
501{
502	unsigned char *b = skb_tail_pointer(skb);
503	struct tcf_pedit *p = to_pedit(a);
504	struct tcf_pedit_parms *parms;
505	struct tc_pedit *opt;
506	struct tcf_t t;
507	int s;
508
509	spin_lock_bh(&p->tcf_lock);
510	parms = rcu_dereference_protected(p->parms, 1);
511	s = struct_size(opt, keys, parms->tcfp_nkeys);
512
513	opt = kzalloc(s, GFP_ATOMIC);
514	if (unlikely(!opt)) {
515		spin_unlock_bh(&p->tcf_lock);
516		return -ENOBUFS;
517	}
518	opt->nkeys = parms->tcfp_nkeys;
519
520	memcpy(opt->keys, parms->tcfp_keys,
521	       flex_array_size(opt, keys, parms->tcfp_nkeys));
522	opt->index = p->tcf_index;
523	opt->flags = parms->tcfp_flags;
524	opt->action = p->tcf_action;
525	opt->refcnt = refcount_read(&p->tcf_refcnt) - ref;
526	opt->bindcnt = atomic_read(&p->tcf_bindcnt) - bind;
527
528	if (parms->tcfp_keys_ex) {
529		if (tcf_pedit_key_ex_dump(skb, parms->tcfp_keys_ex,
530					  parms->tcfp_nkeys))
531			goto nla_put_failure;
532
533		if (nla_put(skb, TCA_PEDIT_PARMS_EX, s, opt))
534			goto nla_put_failure;
535	} else {
536		if (nla_put(skb, TCA_PEDIT_PARMS, s, opt))
537			goto nla_put_failure;
538	}
539
540	tcf_tm_dump(&t, &p->tcf_tm);
541	if (nla_put_64bit(skb, TCA_PEDIT_TM, sizeof(t), &t, TCA_PEDIT_PAD))
542		goto nla_put_failure;
543	spin_unlock_bh(&p->tcf_lock);
544
545	kfree(opt);
546	return skb->len;
547
548nla_put_failure:
549	spin_unlock_bh(&p->tcf_lock);
550	nlmsg_trim(skb, b);
551	kfree(opt);
552	return -1;
553}
554
555static int tcf_pedit_offload_act_setup(struct tc_action *act, void *entry_data,
556				       u32 *index_inc, bool bind,
557				       struct netlink_ext_ack *extack)
558{
559	if (bind) {
560		struct flow_action_entry *entry = entry_data;
561		int k;
562
563		for (k = 0; k < tcf_pedit_nkeys(act); k++) {
564			switch (tcf_pedit_cmd(act, k)) {
565			case TCA_PEDIT_KEY_EX_CMD_SET:
566				entry->id = FLOW_ACTION_MANGLE;
567				break;
568			case TCA_PEDIT_KEY_EX_CMD_ADD:
569				entry->id = FLOW_ACTION_ADD;
570				break;
571			default:
572				NL_SET_ERR_MSG_MOD(extack, "Unsupported pedit command offload");
573				return -EOPNOTSUPP;
574			}
575			entry->mangle.htype = tcf_pedit_htype(act, k);
576			entry->mangle.mask = tcf_pedit_mask(act, k);
577			entry->mangle.val = tcf_pedit_val(act, k);
578			entry->mangle.offset = tcf_pedit_offset(act, k);
579			entry->hw_stats = tc_act_hw_stats(act->hw_stats);
580			entry++;
581		}
582		*index_inc = k;
583	} else {
584		struct flow_offload_action *fl_action = entry_data;
585		u32 cmd = tcf_pedit_cmd(act, 0);
586		int k;
587
588		switch (cmd) {
589		case TCA_PEDIT_KEY_EX_CMD_SET:
590			fl_action->id = FLOW_ACTION_MANGLE;
591			break;
592		case TCA_PEDIT_KEY_EX_CMD_ADD:
593			fl_action->id = FLOW_ACTION_ADD;
594			break;
595		default:
596			NL_SET_ERR_MSG_MOD(extack, "Unsupported pedit command offload");
597			return -EOPNOTSUPP;
598		}
599
600		for (k = 1; k < tcf_pedit_nkeys(act); k++) {
601			if (cmd != tcf_pedit_cmd(act, k)) {
602				NL_SET_ERR_MSG_MOD(extack, "Unsupported pedit command offload");
603				return -EOPNOTSUPP;
604			}
605		}
606	}
607
608	return 0;
609}
610
611static struct tc_action_ops act_pedit_ops = {
612	.kind		=	"pedit",
613	.id		=	TCA_ID_PEDIT,
614	.owner		=	THIS_MODULE,
615	.act		=	tcf_pedit_act,
616	.stats_update	=	tcf_pedit_stats_update,
617	.dump		=	tcf_pedit_dump,
618	.cleanup	=	tcf_pedit_cleanup,
619	.init		=	tcf_pedit_init,
620	.offload_act_setup =	tcf_pedit_offload_act_setup,
621	.size		=	sizeof(struct tcf_pedit),
622};
623MODULE_ALIAS_NET_ACT("pedit");
624
625static __net_init int pedit_init_net(struct net *net)
626{
627	struct tc_action_net *tn = net_generic(net, act_pedit_ops.net_id);
628
629	return tc_action_net_init(net, tn, &act_pedit_ops);
630}
631
632static void __net_exit pedit_exit_net(struct list_head *net_list)
633{
634	tc_action_net_exit(net_list, act_pedit_ops.net_id);
635}
636
637static struct pernet_operations pedit_net_ops = {
638	.init = pedit_init_net,
639	.exit_batch = pedit_exit_net,
640	.id   = &act_pedit_ops.net_id,
641	.size = sizeof(struct tc_action_net),
642};
643
644MODULE_AUTHOR("Jamal Hadi Salim(2002-4)");
645MODULE_DESCRIPTION("Generic Packet Editor actions");
646MODULE_LICENSE("GPL");
647
648static int __init pedit_init_module(void)
649{
650	return tcf_register_action(&act_pedit_ops, &pedit_net_ops);
651}
652
653static void __exit pedit_cleanup_module(void)
654{
655	tcf_unregister_action(&act_pedit_ops, &pedit_net_ops);
656}
657
658module_init(pedit_init_module);
659module_exit(pedit_cleanup_module);
660