[deliverable/linux.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, const 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 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 net *net, 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(net, tp, tb, tca[TCA_RATE], &e, &fw_ext_map);
	if (err < 0)
		return err;

	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 */

	err = -EINVAL;
	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 net *net, struct sk_buff *in_skb,
		     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(net, 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;

	tcf_exts_init(&f->exts);
	f->id = handle;

	err = fw_change_attrs(net, 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))
		goto nla_put_failure;
#ifdef CONFIG_NET_CLS_IND
	if (strlen(f->indev) &&
	    nla_put_string(skb, TCA_FW_INDEV, f->indev))
		goto nla_put_failure;
#endif /* CONFIG_NET_CLS_IND */
	if (head->mask != 0xFFFFFFFF &&
	    nla_put_u32(skb, TCA_FW_MASK, head->mask))
		goto nla_put_failure;

	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
cc7ec456	34	struct fw_head {
c5c13faf	35	struct fw_filter *ht[HTSIZE];
b4e9b520	36	u32 mask;
1da177e4 LT	37	};
1da177e4 LT	38
cc7ec456	39	struct fw_filter {
1da177e4 LT	40	struct fw_filter *next;
	41	u32 id;
	42	struct tcf_result res;
	43	#ifdef CONFIG_NET_CLS_IND
	44	char indev[IFNAMSIZ];
	45	#endif /* CONFIG_NET_CLS_IND */
	46	struct tcf_exts exts;
	47	};
	48
5239008b	49	static const struct tcf_ext_map fw_ext_map = {
1da177e4 LT	50	.action = TCA_FW_ACT,
	51	.police = TCA_FW_POLICE
	52	};
	53
cc7ec456	54	static inline int fw_hash(u32 handle)
1da177e4	55	{
c5c13faf TG	56	if (HTSIZE == 4096)
	57	return ((handle >> 24) & 0xFFF) ^
	58	((handle >> 12) & 0xFFF) ^
	59	(handle & 0xFFF);
	60	else if (HTSIZE == 2048)
	61	return ((handle >> 22) & 0x7FF) ^
	62	((handle >> 11) & 0x7FF) ^
	63	(handle & 0x7FF);
	64	else if (HTSIZE == 1024)
	65	return ((handle >> 20) & 0x3FF) ^
	66	((handle >> 10) & 0x3FF) ^
	67	(handle & 0x3FF);
	68	else if (HTSIZE == 512)
	69	return (handle >> 27) ^
	70	((handle >> 18) & 0x1FF) ^
	71	((handle >> 9) & 0x1FF) ^
	72	(handle & 0x1FF);
	73	else if (HTSIZE == 256) {
	74	u8 t = (u8 ) &handle;
	75	return t[0] ^ t[1] ^ t[2] ^ t[3];
10297b99	76	} else
c5c13faf	77	return handle & (HTSIZE - 1);
1da177e4 LT	78	}
1da177e4 LT	79
dc7f9f6e	80	static int fw_classify(struct sk_buff skb, const struct tcf_proto tp,
1da177e4 LT	81	struct tcf_result *res)
1da177e4 LT	82	{
cc7ec456	83	struct fw_head head = (struct fw_head )tp->root;
1da177e4 LT	84	struct fw_filter *f;
1da177e4 LT	85	int r;
5c804bfd	86	u32 id = skb->mark;
1da177e4 LT	87
1da177e4 LT	88	if (head != NULL) {
5c804bfd	89	id &= head->mask;
cc7ec456	90	for (f = head->ht[fw_hash(id)]; f; f = f->next) {
1da177e4 LT	91	if (f->id == id) {
	92	*res = f->res;
	93	#ifdef CONFIG_NET_CLS_IND
	94	if (!tcf_match_indev(skb, f->indev))
	95	continue;
	96	#endif /* CONFIG_NET_CLS_IND */
	97	r = tcf_exts_exec(skb, &f->exts, res);
	98	if (r < 0)
	99	continue;
	100
	101	return r;
	102	}
	103	}
	104	} else {
	105	/* old method */
cc7ec456 ED	106	if (id && (TC_H_MAJ(id) == 0 \|\|
cc7ec456 ED	107	!(TC_H_MAJ(id ^ tp->q->handle)))) {
1da177e4 LT	108	res->classid = id;
	109	res->class = 0;
	110	return 0;
	111	}
	112	}
	113
	114	return -1;
	115	}
	116
	117	static unsigned long fw_get(struct tcf_proto *tp, u32 handle)
	118	{
cc7ec456	119	struct fw_head head = (struct fw_head )tp->root;
1da177e4 LT	120	struct fw_filter *f;
	121
	122	if (head == NULL)
	123	return 0;
	124
cc7ec456	125	for (f = head->ht[fw_hash(handle)]; f; f = f->next) {
1da177e4 LT	126	if (f->id == handle)
	127	return (unsigned long)f;
	128	}
	129	return 0;
	130	}
	131
	132	static void fw_put(struct tcf_proto *tp, unsigned long f)
	133	{
	134	}
	135
	136	static int fw_init(struct tcf_proto *tp)
	137	{
	138	return 0;
	139	}
	140
cc7ec456	141	static void fw_delete_filter(struct tcf_proto tp, struct fw_filter f)
1da177e4 LT	142	{
	143	tcf_unbind_filter(tp, &f->res);
	144	tcf_exts_destroy(tp, &f->exts);
	145	kfree(f);
	146	}
	147
	148	static void fw_destroy(struct tcf_proto *tp)
	149	{
47a1a1d4	150	struct fw_head *head = tp->root;
1da177e4 LT	151	struct fw_filter *f;
	152	int h;
	153
	154	if (head == NULL)
	155	return;
	156
cc7ec456 ED	157	for (h = 0; h < HTSIZE; h++) {
cc7ec456 ED	158	while ((f = head->ht[h]) != NULL) {
1da177e4 LT	159	head->ht[h] = f->next;
	160	fw_delete_filter(tp, f);
	161	}
	162	}
	163	kfree(head);
	164	}
	165
	166	static int fw_delete(struct tcf_proto *tp, unsigned long arg)
	167	{
cc7ec456 ED	168	struct fw_head head = (struct fw_head )tp->root;
cc7ec456 ED	169	struct fw_filter f = (struct fw_filter )arg;
1da177e4 LT	170	struct fw_filter **fp;
	171
	172	if (head == NULL \|\| f == NULL)
	173	goto out;
	174
cc7ec456	175	for (fp = &head->ht[fw_hash(f->id)]; fp; fp = &(fp)->next) {
1da177e4 LT	176	if (*fp == f) {
	177	tcf_tree_lock(tp);
	178	*fp = f->next;
	179	tcf_tree_unlock(tp);
	180	fw_delete_filter(tp, f);
	181	return 0;
	182	}
	183	}
	184	out:
	185	return -EINVAL;
	186	}
	187
6fa8c014 PM	188	static const struct nla_policy fw_policy[TCA_FW_MAX + 1] = {
	189	[TCA_FW_CLASSID] = { .type = NLA_U32 },
	190	[TCA_FW_INDEV] = { .type = NLA_STRING, .len = IFNAMSIZ },
	191	[TCA_FW_MASK] = { .type = NLA_U32 },
	192	};
	193
1da177e4	194	static int
c1b52739	195	fw_change_attrs(struct net net, struct tcf_proto tp, struct fw_filter *f,
add93b61	196	struct nlattr tb, struct nlattr tca, unsigned long base)
1da177e4	197	{
b4e9b520	198	struct fw_head head = (struct fw_head )tp->root;
1da177e4	199	struct tcf_exts e;
b4e9b520	200	u32 mask;
1da177e4 LT	201	int err;
1da177e4 LT	202
c1b52739	203	err = tcf_exts_validate(net, tp, tb, tca[TCA_RATE], &e, &fw_ext_map);
1da177e4 LT	204	if (err < 0)
	205	return err;
	206
add93b61	207	if (tb[TCA_FW_CLASSID]) {
1587bac4	208	f->res.classid = nla_get_u32(tb[TCA_FW_CLASSID]);
1da177e4 LT	209	tcf_bind_filter(tp, &f->res, base);
	210	}
	211
	212	#ifdef CONFIG_NET_CLS_IND
add93b61 PM	213	if (tb[TCA_FW_INDEV]) {
add93b61 PM	214	err = tcf_change_indev(tp, f->indev, tb[TCA_FW_INDEV]);
1da177e4 LT	215	if (err < 0)
	216	goto errout;
	217	}
	218	#endif /* CONFIG_NET_CLS_IND */
	219
cb95ec62	220	err = -EINVAL;
add93b61	221	if (tb[TCA_FW_MASK]) {
1587bac4	222	mask = nla_get_u32(tb[TCA_FW_MASK]);
b4e9b520 PM	223	if (mask != head->mask)
	224	goto errout;
	225	} else if (head->mask != 0xFFFFFFFF)
	226	goto errout;
	227
1da177e4 LT	228	tcf_exts_change(tp, &f->exts, &e);
	229
	230	return 0;
	231	errout:
	232	tcf_exts_destroy(tp, &e);
	233	return err;
	234	}
	235
c1b52739	236	static int fw_change(struct net net, struct sk_buff in_skb,
af4c6641	237	struct tcf_proto *tp, unsigned long base,
1da177e4	238	u32 handle,
add93b61	239	struct nlattr **tca,
1da177e4 LT	240	unsigned long *arg)
1da177e4 LT	241	{
cc7ec456	242	struct fw_head head = (struct fw_head )tp->root;
1da177e4	243	struct fw_filter f = (struct fw_filter ) *arg;
add93b61 PM	244	struct nlattr *opt = tca[TCA_OPTIONS];
add93b61 PM	245	struct nlattr *tb[TCA_FW_MAX + 1];
1da177e4 LT	246	int err;
	247
	248	if (!opt)
	249	return handle ? -EINVAL : 0;
	250
6fa8c014	251	err = nla_parse_nested(tb, TCA_FW_MAX, opt, fw_policy);
cee63723 PM	252	if (err < 0)
cee63723 PM	253	return err;
1da177e4 LT	254
	255	if (f != NULL) {
	256	if (f->id != handle && handle)
	257	return -EINVAL;
c1b52739	258	return fw_change_attrs(net, tp, f, tb, tca, base);
1da177e4 LT	259	}
	260
	261	if (!handle)
	262	return -EINVAL;
	263
	264	if (head == NULL) {
b4e9b520	265	u32 mask = 0xFFFFFFFF;
6fa8c014	266	if (tb[TCA_FW_MASK])
1587bac4	267	mask = nla_get_u32(tb[TCA_FW_MASK]);
b4e9b520	268
0da974f4	269	head = kzalloc(sizeof(struct fw_head), GFP_KERNEL);
1da177e4 LT	270	if (head == NULL)
1da177e4 LT	271	return -ENOBUFS;
b4e9b520	272	head->mask = mask;
1da177e4 LT	273
	274	tcf_tree_lock(tp);
	275	tp->root = head;
	276	tcf_tree_unlock(tp);
	277	}
	278
0da974f4	279	f = kzalloc(sizeof(struct fw_filter), GFP_KERNEL);
1da177e4 LT	280	if (f == NULL)
1da177e4 LT	281	return -ENOBUFS;
1da177e4	282
33be6271	283	tcf_exts_init(&f->exts);
1da177e4 LT	284	f->id = handle;
1da177e4 LT	285
c1b52739	286	err = fw_change_attrs(net, tp, f, tb, tca, base);
1da177e4 LT	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	{
cc7ec456	305	struct fw_head head = (struct fw_head )tp->root;
1da177e4 LT	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;
cc7ec456	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	350
1b34ec43 DM	351	if (f->res.classid &&
	352	nla_put_u32(skb, TCA_FW_CLASSID, f->res.classid))
	353	goto nla_put_failure;
1da177e4	354	#ifdef CONFIG_NET_CLS_IND
1b34ec43 DM	355	if (strlen(f->indev) &&
	356	nla_put_string(skb, TCA_FW_INDEV, f->indev))
	357	goto nla_put_failure;
1da177e4	358	#endif /* CONFIG_NET_CLS_IND */
1b34ec43 DM	359	if (head->mask != 0xFFFFFFFF &&
	360	nla_put_u32(skb, TCA_FW_MASK, head->mask))
	361	goto nla_put_failure;
1da177e4 LT	362
1da177e4 LT	363	if (tcf_exts_dump(skb, &f->exts, &fw_ext_map) < 0)
add93b61	364	goto nla_put_failure;
1da177e4	365
4b3550ef	366	nla_nest_end(skb, nest);
1da177e4 LT	367
1da177e4 LT	368	if (tcf_exts_dump_stats(skb, &f->exts, &fw_ext_map) < 0)
add93b61	369	goto nla_put_failure;
1da177e4 LT	370
	371	return skb->len;
	372
add93b61	373	nla_put_failure:
dc5fc579	374	nlmsg_trim(skb, b);
1da177e4 LT	375	return -1;
	376	}
	377
2eb9d75c	378	static struct tcf_proto_ops cls_fw_ops __read_mostly = {
1da177e4 LT	379	.kind = "fw",
	380	.classify = fw_classify,
	381	.init = fw_init,
	382	.destroy = fw_destroy,
	383	.get = fw_get,
	384	.put = fw_put,
	385	.change = fw_change,
	386	.delete = fw_delete,
	387	.walk = fw_walk,
	388	.dump = fw_dump,
	389	.owner = THIS_MODULE,
	390	};
	391
	392	static int __init init_fw(void)
	393	{
	394	return register_tcf_proto_ops(&cls_fw_ops);
	395	}
	396
10297b99	397	static void __exit exit_fw(void)
1da177e4 LT	398	{
	399	unregister_tcf_proto_ops(&cls_fw_ops);
	400	}
	401
	402	module_init(init_fw)
	403	module_exit(exit_fw)
	404	MODULE_LICENSE("GPL");