[net-next-2.6.git] / net / sched / cls_fw.c

/*
 * net/sched/cls_fw.c	Classifier mapping ipchains' fwmark to traffic class.
 *
 *		This program is free software; you can redistribute it and/or
 *		modify it under the terms of the GNU General Public License
 *		as published by the Free Software Foundation; either version
 *		2 of the License, or (at your option) any later version.
 *
 * Authors:	Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
 *
 * Changes:
 * Karlis Peisenieks <karlis@mt.lv> : 990415 : fw_walk off by one
 * Karlis Peisenieks <karlis@mt.lv> : 990415 : fw_delete killed all the filter (and kernel).
 * Alex <alex@pilotsoft.com> : 2004xxyy: Added Action extension
 *
 * JHS: We should remove the CONFIG_NET_CLS_IND from here
 * eventually when the meta match extension is made available
 *
 */

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/skbuff.h>
#include <net/netlink.h>
#include <net/act_api.h>
#include <net/pkt_cls.h>

#define HTSIZE (PAGE_SIZE/sizeof(struct fw_filter *))

struct fw_head
{
	struct fw_filter *ht[HTSIZE];
	u32 mask;
};

struct fw_filter
{
	struct fw_filter	*next;
	u32			id;
	struct tcf_result	res;
#ifdef CONFIG_NET_CLS_IND
	char			indev[IFNAMSIZ];
#endif /* CONFIG_NET_CLS_IND */
	struct tcf_exts		exts;
};

static const struct tcf_ext_map fw_ext_map = {
	.action = TCA_FW_ACT,
	.police = TCA_FW_POLICE
};

static __inline__ int fw_hash(u32 handle)
{
	if (HTSIZE == 4096)
		return ((handle >> 24) & 0xFFF) ^
		       ((handle >> 12) & 0xFFF) ^
		       (handle & 0xFFF);
	else if (HTSIZE == 2048)
		return ((handle >> 22) & 0x7FF) ^
		       ((handle >> 11) & 0x7FF) ^
		       (handle & 0x7FF);
	else if (HTSIZE == 1024)
		return ((handle >> 20) & 0x3FF) ^
		       ((handle >> 10) & 0x3FF) ^
		       (handle & 0x3FF);
	else if (HTSIZE == 512)
		return (handle >> 27) ^
		       ((handle >> 18) & 0x1FF) ^
		       ((handle >> 9) & 0x1FF) ^
		       (handle & 0x1FF);
	else if (HTSIZE == 256) {
		u8 *t = (u8 *) &handle;
		return t[0] ^ t[1] ^ t[2] ^ t[3];
	} else
		return handle & (HTSIZE - 1);
}

static int fw_classify(struct sk_buff *skb, struct tcf_proto *tp,
			  struct tcf_result *res)
{
	struct fw_head *head = (struct fw_head*)tp->root;
	struct fw_filter *f;
	int r;
	u32 id = skb->mark;

	if (head != NULL) {
		id &= head->mask;
		for (f=head->ht[fw_hash(id)]; f; f=f->next) {
			if (f->id == id) {
				*res = f->res;
#ifdef CONFIG_NET_CLS_IND
				if (!tcf_match_indev(skb, f->indev))
					continue;
#endif /* CONFIG_NET_CLS_IND */
				r = tcf_exts_exec(skb, &f->exts, res);
				if (r < 0)
					continue;

				return r;
			}
		}
	} else {
		/* old method */
		if (id && (TC_H_MAJ(id) == 0 || !(TC_H_MAJ(id^tp->q->handle)))) {
			res->classid = id;
			res->class = 0;
			return 0;
		}
	}

	return -1;
}

static unsigned long fw_get(struct tcf_proto *tp, u32 handle)
{
	struct fw_head *head = (struct fw_head*)tp->root;
	struct fw_filter *f;

	if (head == NULL)
		return 0;

	for (f=head->ht[fw_hash(handle)]; f; f=f->next) {
		if (f->id == handle)
			return (unsigned long)f;
	}
	return 0;
}

static void fw_put(struct tcf_proto *tp, unsigned long f)
{
}

static int fw_init(struct tcf_proto *tp)
{
	return 0;
}

static inline void
fw_delete_filter(struct tcf_proto *tp, struct fw_filter *f)
{
	tcf_unbind_filter(tp, &f->res);
	tcf_exts_destroy(tp, &f->exts);
	kfree(f);
}

static void fw_destroy(struct tcf_proto *tp)
{
	struct fw_head *head = tp->root;
	struct fw_filter *f;
	int h;

	if (head == NULL)
		return;

	for (h=0; h<HTSIZE; h++) {
		while ((f=head->ht[h]) != NULL) {
			head->ht[h] = f->next;
			fw_delete_filter(tp, f);
		}
	}
	kfree(head);
}

static int fw_delete(struct tcf_proto *tp, unsigned long arg)
{
	struct fw_head *head = (struct fw_head*)tp->root;
	struct fw_filter *f = (struct fw_filter*)arg;
	struct fw_filter **fp;

	if (head == NULL || f == NULL)
		goto out;

	for (fp=&head->ht[fw_hash(f->id)]; *fp; fp = &(*fp)->next) {
		if (*fp == f) {
			tcf_tree_lock(tp);
			*fp = f->next;
			tcf_tree_unlock(tp);
			fw_delete_filter(tp, f);
			return 0;
		}
	}
out:
	return -EINVAL;
}

static const struct nla_policy fw_policy[TCA_FW_MAX + 1] = {
	[TCA_FW_CLASSID]	= { .type = NLA_U32 },
	[TCA_FW_INDEV]		= { .type = NLA_STRING, .len = IFNAMSIZ },
	[TCA_FW_MASK]		= { .type = NLA_U32 },
};

static int
fw_change_attrs(struct tcf_proto *tp, struct fw_filter *f,
	struct nlattr **tb, struct nlattr **tca, unsigned long base)
{
	struct fw_head *head = (struct fw_head *)tp->root;
	struct tcf_exts e;
	u32 mask;
	int err;

	err = tcf_exts_validate(tp, tb, tca[TCA_RATE], &e, &fw_ext_map);
	if (err < 0)
		return err;

	err = -EINVAL;
	if (tb[TCA_FW_CLASSID]) {
		f->res.classid = nla_get_u32(tb[TCA_FW_CLASSID]);
		tcf_bind_filter(tp, &f->res, base);
	}

#ifdef CONFIG_NET_CLS_IND
	if (tb[TCA_FW_INDEV]) {
		err = tcf_change_indev(tp, f->indev, tb[TCA_FW_INDEV]);
		if (err < 0)
			goto errout;
	}
#endif /* CONFIG_NET_CLS_IND */

	if (tb[TCA_FW_MASK]) {
		mask = nla_get_u32(tb[TCA_FW_MASK]);
		if (mask != head->mask)
			goto errout;
	} else if (head->mask != 0xFFFFFFFF)
		goto errout;

	tcf_exts_change(tp, &f->exts, &e);

	return 0;
errout:
	tcf_exts_destroy(tp, &e);
	return err;
}

static int fw_change(struct tcf_proto *tp, unsigned long base,
		     u32 handle,
		     struct nlattr **tca,
		     unsigned long *arg)
{
	struct fw_head *head = (struct fw_head*)tp->root;
	struct fw_filter *f = (struct fw_filter *) *arg;
	struct nlattr *opt = tca[TCA_OPTIONS];
	struct nlattr *tb[TCA_FW_MAX + 1];
	int err;

	if (!opt)
		return handle ? -EINVAL : 0;

	err = nla_parse_nested(tb, TCA_FW_MAX, opt, fw_policy);
	if (err < 0)
		return err;

	if (f != NULL) {
		if (f->id != handle && handle)
			return -EINVAL;
		return fw_change_attrs(tp, f, tb, tca, base);
	}

	if (!handle)
		return -EINVAL;

	if (head == NULL) {
		u32 mask = 0xFFFFFFFF;
		if (tb[TCA_FW_MASK])
			mask = nla_get_u32(tb[TCA_FW_MASK]);

		head = kzalloc(sizeof(struct fw_head), GFP_KERNEL);
		if (head == NULL)
			return -ENOBUFS;
		head->mask = mask;

		tcf_tree_lock(tp);
		tp->root = head;
		tcf_tree_unlock(tp);
	}

	f = kzalloc(sizeof(struct fw_filter), GFP_KERNEL);
	if (f == NULL)
		return -ENOBUFS;

	f->id = handle;

	err = fw_change_attrs(tp, f, tb, tca, base);
	if (err < 0)
		goto errout;

	f->next = head->ht[fw_hash(handle)];
	tcf_tree_lock(tp);
	head->ht[fw_hash(handle)] = f;
	tcf_tree_unlock(tp);

	*arg = (unsigned long)f;
	return 0;

errout:
	kfree(f);
	return err;
}

static void fw_walk(struct tcf_proto *tp, struct tcf_walker *arg)
{
	struct fw_head *head = (struct fw_head*)tp->root;
	int h;

	if (head == NULL)
		arg->stop = 1;

	if (arg->stop)
		return;

	for (h = 0; h < HTSIZE; h++) {
		struct fw_filter *f;

		for (f = head->ht[h]; f; f = f->next) {
			if (arg->count < arg->skip) {
				arg->count++;
				continue;
			}
			if (arg->fn(tp, (unsigned long)f, arg) < 0) {
				arg->stop = 1;
				return;
			}
			arg->count++;
		}
	}
}

static int fw_dump(struct tcf_proto *tp, unsigned long fh,
		   struct sk_buff *skb, struct tcmsg *t)
{
	struct fw_head *head = (struct fw_head *)tp->root;
	struct fw_filter *f = (struct fw_filter*)fh;
	unsigned char *b = skb_tail_pointer(skb);
	struct nlattr *nest;

	if (f == NULL)
		return skb->len;

	t->tcm_handle = f->id;

	if (!f->res.classid && !tcf_exts_is_available(&f->exts))
		return skb->len;

	nest = nla_nest_start(skb, TCA_OPTIONS);
	if (nest == NULL)
		goto nla_put_failure;

	if (f->res.classid)
		NLA_PUT_U32(skb, TCA_FW_CLASSID, f->res.classid);
#ifdef CONFIG_NET_CLS_IND
	if (strlen(f->indev))
		NLA_PUT_STRING(skb, TCA_FW_INDEV, f->indev);
#endif /* CONFIG_NET_CLS_IND */
	if (head->mask != 0xFFFFFFFF)
		NLA_PUT_U32(skb, TCA_FW_MASK, head->mask);

	if (tcf_exts_dump(skb, &f->exts, &fw_ext_map) < 0)
		goto nla_put_failure;

	nla_nest_end(skb, nest);

	if (tcf_exts_dump_stats(skb, &f->exts, &fw_ext_map) < 0)
		goto nla_put_failure;

	return skb->len;

nla_put_failure:
	nlmsg_trim(skb, b);
	return -1;
}

static struct tcf_proto_ops cls_fw_ops __read_mostly = {
	.kind		=	"fw",
	.classify	=	fw_classify,
	.init		=	fw_init,
	.destroy	=	fw_destroy,
	.get		=	fw_get,
	.put		=	fw_put,
	.change		=	fw_change,
	.delete		=	fw_delete,
	.walk		=	fw_walk,
	.dump		=	fw_dump,
	.owner		=	THIS_MODULE,
};

static int __init init_fw(void)
{
	return register_tcf_proto_ops(&cls_fw_ops);
}

static void __exit exit_fw(void)
{
	unregister_tcf_proto_ops(&cls_fw_ops);
}

module_init(init_fw)
module_exit(exit_fw)
MODULE_LICENSE("GPL");
Commit	Line	Data
1da177e4 LT	1	/*
	2	* net/sched/cls_fw.c Classifier mapping ipchains' fwmark to traffic class.
	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: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
	10	*
	11	* Changes:
	12	* Karlis Peisenieks <karlis@mt.lv> : 990415 : fw_walk off by one
	13	* Karlis Peisenieks <karlis@mt.lv> : 990415 : fw_delete killed all the filter (and kernel).
	14	* Alex <alex@pilotsoft.com> : 2004xxyy: Added Action extension
	15	*
	16	* JHS: We should remove the CONFIG_NET_CLS_IND from here
	17	* eventually when the meta match extension is made available
	18	*
	19	*/
	20
1da177e4	21	#include <linux/module.h>
5a0e3ad6	22	#include <linux/slab.h>
1da177e4 LT	23	#include <linux/types.h>
1da177e4 LT	24	#include <linux/kernel.h>
1da177e4	25	#include <linux/string.h>
1da177e4	26	#include <linux/errno.h>
1da177e4	27	#include <linux/skbuff.h>
0ba48053	28	#include <net/netlink.h>
1da177e4 LT	29	#include <net/act_api.h>
	30	#include <net/pkt_cls.h>
	31
c5c13faf TG	32	#define HTSIZE (PAGE_SIZE/sizeof(struct fw_filter *))
c5c13faf TG	33
1da177e4 LT	34	struct fw_head
1da177e4 LT	35	{
c5c13faf	36	struct fw_filter *ht[HTSIZE];
b4e9b520	37	u32 mask;
1da177e4 LT	38	};
	39
	40	struct fw_filter
	41	{
	42	struct fw_filter *next;
	43	u32 id;
	44	struct tcf_result res;
	45	#ifdef CONFIG_NET_CLS_IND
	46	char indev[IFNAMSIZ];
	47	#endif /* CONFIG_NET_CLS_IND */
	48	struct tcf_exts exts;
	49	};
	50
5239008b	51	static const struct tcf_ext_map fw_ext_map = {
1da177e4 LT	52	.action = TCA_FW_ACT,
	53	.police = TCA_FW_POLICE
	54	};
	55
	56	static __inline__ int fw_hash(u32 handle)
	57	{
c5c13faf TG	58	if (HTSIZE == 4096)
	59	return ((handle >> 24) & 0xFFF) ^
	60	((handle >> 12) & 0xFFF) ^
	61	(handle & 0xFFF);
	62	else if (HTSIZE == 2048)
	63	return ((handle >> 22) & 0x7FF) ^
	64	((handle >> 11) & 0x7FF) ^
	65	(handle & 0x7FF);
	66	else if (HTSIZE == 1024)
	67	return ((handle >> 20) & 0x3FF) ^
	68	((handle >> 10) & 0x3FF) ^
	69	(handle & 0x3FF);
	70	else if (HTSIZE == 512)
	71	return (handle >> 27) ^
	72	((handle >> 18) & 0x1FF) ^
	73	((handle >> 9) & 0x1FF) ^
	74	(handle & 0x1FF);
	75	else if (HTSIZE == 256) {
	76	u8 t = (u8 ) &handle;
	77	return t[0] ^ t[1] ^ t[2] ^ t[3];
10297b99	78	} else
c5c13faf	79	return handle & (HTSIZE - 1);
1da177e4 LT	80	}
	81
	82	static int fw_classify(struct sk_buff skb, struct tcf_proto tp,
	83	struct tcf_result *res)
	84	{
	85	struct fw_head head = (struct fw_head)tp->root;
	86	struct fw_filter *f;
	87	int r;
5c804bfd	88	u32 id = skb->mark;
1da177e4 LT	89
1da177e4 LT	90	if (head != NULL) {
5c804bfd	91	id &= head->mask;
1da177e4 LT	92	for (f=head->ht[fw_hash(id)]; f; f=f->next) {
	93	if (f->id == id) {
	94	*res = f->res;
	95	#ifdef CONFIG_NET_CLS_IND
	96	if (!tcf_match_indev(skb, f->indev))
	97	continue;
	98	#endif /* CONFIG_NET_CLS_IND */
	99	r = tcf_exts_exec(skb, &f->exts, res);
	100	if (r < 0)
	101	continue;
	102
	103	return r;
	104	}
	105	}
	106	} else {
	107	/* old method */
	108	if (id && (TC_H_MAJ(id) == 0 \|\| !(TC_H_MAJ(id^tp->q->handle)))) {
	109	res->classid = id;
	110	res->class = 0;
	111	return 0;
	112	}
	113	}
	114
	115	return -1;
	116	}
	117
	118	static unsigned long fw_get(struct tcf_proto *tp, u32 handle)
	119	{
	120	struct fw_head head = (struct fw_head)tp->root;
	121	struct fw_filter *f;
	122
	123	if (head == NULL)
	124	return 0;
	125
	126	for (f=head->ht[fw_hash(handle)]; f; f=f->next) {
	127	if (f->id == handle)
	128	return (unsigned long)f;
	129	}
	130	return 0;
	131	}
	132
	133	static void fw_put(struct tcf_proto *tp, unsigned long f)
	134	{
	135	}
	136
	137	static int fw_init(struct tcf_proto *tp)
	138	{
	139	return 0;
	140	}
	141
	142	static inline void
	143	fw_delete_filter(struct tcf_proto tp, struct fw_filter f)
	144	{
	145	tcf_unbind_filter(tp, &f->res);
	146	tcf_exts_destroy(tp, &f->exts);
	147	kfree(f);
	148	}
	149
	150	static void fw_destroy(struct tcf_proto *tp)
	151	{
47a1a1d4	152	struct fw_head *head = tp->root;
1da177e4 LT	153	struct fw_filter *f;
	154	int h;
	155
	156	if (head == NULL)
	157	return;
	158
c5c13faf	159	for (h=0; h<HTSIZE; h++) {
1da177e4 LT	160	while ((f=head->ht[h]) != NULL) {
	161	head->ht[h] = f->next;
	162	fw_delete_filter(tp, f);
	163	}
	164	}
	165	kfree(head);
	166	}
	167
	168	static int fw_delete(struct tcf_proto *tp, unsigned long arg)
	169	{
	170	struct fw_head head = (struct fw_head)tp->root;
	171	struct fw_filter f = (struct fw_filter)arg;
	172	struct fw_filter **fp;
	173
	174	if (head == NULL \|\| f == NULL)
	175	goto out;
	176
	177	for (fp=&head->ht[fw_hash(f->id)]; fp; fp = &(fp)->next) {
	178	if (*fp == f) {
	179	tcf_tree_lock(tp);
	180	*fp = f->next;
	181	tcf_tree_unlock(tp);
	182	fw_delete_filter(tp, f);
	183	return 0;
	184	}
	185	}
	186	out:
	187	return -EINVAL;
	188	}
	189
6fa8c014 PM	190	static const struct nla_policy fw_policy[TCA_FW_MAX + 1] = {
	191	[TCA_FW_CLASSID] = { .type = NLA_U32 },
	192	[TCA_FW_INDEV] = { .type = NLA_STRING, .len = IFNAMSIZ },
	193	[TCA_FW_MASK] = { .type = NLA_U32 },
	194	};
	195
1da177e4 LT	196	static int
1da177e4 LT	197	fw_change_attrs(struct tcf_proto tp, struct fw_filter f,
add93b61	198	struct nlattr tb, struct nlattr tca, unsigned long base)
1da177e4	199	{
b4e9b520	200	struct fw_head head = (struct fw_head )tp->root;
1da177e4	201	struct tcf_exts e;
b4e9b520	202	u32 mask;
1da177e4 LT	203	int err;
1da177e4 LT	204
add93b61	205	err = tcf_exts_validate(tp, tb, tca[TCA_RATE], &e, &fw_ext_map);
1da177e4 LT	206	if (err < 0)
	207	return err;
	208
	209	err = -EINVAL;
add93b61	210	if (tb[TCA_FW_CLASSID]) {
1587bac4	211	f->res.classid = nla_get_u32(tb[TCA_FW_CLASSID]);
1da177e4 LT	212	tcf_bind_filter(tp, &f->res, base);
	213	}
	214
	215	#ifdef CONFIG_NET_CLS_IND
add93b61 PM	216	if (tb[TCA_FW_INDEV]) {
add93b61 PM	217	err = tcf_change_indev(tp, f->indev, tb[TCA_FW_INDEV]);
1da177e4 LT	218	if (err < 0)
	219	goto errout;
	220	}
	221	#endif /* CONFIG_NET_CLS_IND */
	222
add93b61	223	if (tb[TCA_FW_MASK]) {
1587bac4	224	mask = nla_get_u32(tb[TCA_FW_MASK]);
b4e9b520 PM	225	if (mask != head->mask)
	226	goto errout;
	227	} else if (head->mask != 0xFFFFFFFF)
	228	goto errout;
	229
1da177e4 LT	230	tcf_exts_change(tp, &f->exts, &e);
	231
	232	return 0;
	233	errout:
	234	tcf_exts_destroy(tp, &e);
	235	return err;
	236	}
	237
	238	static int fw_change(struct tcf_proto *tp, unsigned long base,
	239	u32 handle,
add93b61	240	struct nlattr **tca,
1da177e4 LT	241	unsigned long *arg)
	242	{
	243	struct fw_head head = (struct fw_head)tp->root;
	244	struct fw_filter f = (struct fw_filter ) *arg;
add93b61 PM	245	struct nlattr *opt = tca[TCA_OPTIONS];
add93b61 PM	246	struct nlattr *tb[TCA_FW_MAX + 1];
1da177e4 LT	247	int err;
	248
	249	if (!opt)
	250	return handle ? -EINVAL : 0;
	251
6fa8c014	252	err = nla_parse_nested(tb, TCA_FW_MAX, opt, fw_policy);
cee63723 PM	253	if (err < 0)
cee63723 PM	254	return err;
1da177e4 LT	255
	256	if (f != NULL) {
	257	if (f->id != handle && handle)
	258	return -EINVAL;
	259	return fw_change_attrs(tp, f, tb, tca, base);
	260	}
	261
	262	if (!handle)
	263	return -EINVAL;
	264
	265	if (head == NULL) {
b4e9b520	266	u32 mask = 0xFFFFFFFF;
6fa8c014	267	if (tb[TCA_FW_MASK])
1587bac4	268	mask = nla_get_u32(tb[TCA_FW_MASK]);
b4e9b520	269
0da974f4	270	head = kzalloc(sizeof(struct fw_head), GFP_KERNEL);
1da177e4 LT	271	if (head == NULL)
1da177e4 LT	272	return -ENOBUFS;
b4e9b520	273	head->mask = mask;
1da177e4 LT	274
	275	tcf_tree_lock(tp);
	276	tp->root = head;
	277	tcf_tree_unlock(tp);
	278	}
	279
0da974f4	280	f = kzalloc(sizeof(struct fw_filter), GFP_KERNEL);
1da177e4 LT	281	if (f == NULL)
1da177e4 LT	282	return -ENOBUFS;
1da177e4 LT	283
	284	f->id = handle;
	285
	286	err = fw_change_attrs(tp, f, tb, tca, base);
	287	if (err < 0)
	288	goto errout;
	289
	290	f->next = head->ht[fw_hash(handle)];
	291	tcf_tree_lock(tp);
	292	head->ht[fw_hash(handle)] = f;
	293	tcf_tree_unlock(tp);
	294
	295	*arg = (unsigned long)f;
	296	return 0;
	297
	298	errout:
a51482bd	299	kfree(f);
1da177e4 LT	300	return err;
	301	}
	302
	303	static void fw_walk(struct tcf_proto tp, struct tcf_walker arg)
	304	{
	305	struct fw_head head = (struct fw_head)tp->root;
	306	int h;
	307
	308	if (head == NULL)
	309	arg->stop = 1;
	310
	311	if (arg->stop)
	312	return;
	313
c5c13faf	314	for (h = 0; h < HTSIZE; h++) {
1da177e4 LT	315	struct fw_filter *f;
	316
	317	for (f = head->ht[h]; f; f = f->next) {
	318	if (arg->count < arg->skip) {
	319	arg->count++;
	320	continue;
	321	}
	322	if (arg->fn(tp, (unsigned long)f, arg) < 0) {
	323	arg->stop = 1;
	324	return;
	325	}
	326	arg->count++;
	327	}
	328	}
	329	}
	330
	331	static int fw_dump(struct tcf_proto *tp, unsigned long fh,
	332	struct sk_buff skb, struct tcmsg t)
	333	{
b4e9b520	334	struct fw_head head = (struct fw_head )tp->root;
1da177e4	335	struct fw_filter f = (struct fw_filter)fh;
27a884dc	336	unsigned char *b = skb_tail_pointer(skb);
4b3550ef	337	struct nlattr *nest;
1da177e4 LT	338
	339	if (f == NULL)
	340	return skb->len;
	341
	342	t->tcm_handle = f->id;
	343
	344	if (!f->res.classid && !tcf_exts_is_available(&f->exts))
	345	return skb->len;
	346
4b3550ef PM	347	nest = nla_nest_start(skb, TCA_OPTIONS);
	348	if (nest == NULL)
	349	goto nla_put_failure;
1da177e4 LT	350
1da177e4 LT	351	if (f->res.classid)
24beeab5	352	NLA_PUT_U32(skb, TCA_FW_CLASSID, f->res.classid);
1da177e4 LT	353	#ifdef CONFIG_NET_CLS_IND
1da177e4 LT	354	if (strlen(f->indev))
57e1c487	355	NLA_PUT_STRING(skb, TCA_FW_INDEV, f->indev);
1da177e4	356	#endif /* CONFIG_NET_CLS_IND */
b4e9b520	357	if (head->mask != 0xFFFFFFFF)
24beeab5	358	NLA_PUT_U32(skb, TCA_FW_MASK, head->mask);
1da177e4 LT	359
1da177e4 LT	360	if (tcf_exts_dump(skb, &f->exts, &fw_ext_map) < 0)
add93b61	361	goto nla_put_failure;
1da177e4	362
4b3550ef	363	nla_nest_end(skb, nest);
1da177e4 LT	364
1da177e4 LT	365	if (tcf_exts_dump_stats(skb, &f->exts, &fw_ext_map) < 0)
add93b61	366	goto nla_put_failure;
1da177e4 LT	367
	368	return skb->len;
	369
add93b61	370	nla_put_failure:
dc5fc579	371	nlmsg_trim(skb, b);
1da177e4 LT	372	return -1;
	373	}
	374
2eb9d75c	375	static struct tcf_proto_ops cls_fw_ops __read_mostly = {
1da177e4 LT	376	.kind = "fw",
	377	.classify = fw_classify,
	378	.init = fw_init,
	379	.destroy = fw_destroy,
	380	.get = fw_get,
	381	.put = fw_put,
	382	.change = fw_change,
	383	.delete = fw_delete,
	384	.walk = fw_walk,
	385	.dump = fw_dump,
	386	.owner = THIS_MODULE,
	387	};
	388
	389	static int __init init_fw(void)
	390	{
	391	return register_tcf_proto_ops(&cls_fw_ops);
	392	}
	393
10297b99	394	static void __exit exit_fw(void)
1da177e4 LT	395	{
	396	unregister_tcf_proto_ops(&cls_fw_ops);
	397	}
	398
	399	module_init(init_fw)
	400	module_exit(exit_fw)
	401	MODULE_LICENSE("GPL");