[thirdparty/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 <asm/uaccess.h>
#include <asm/system.h>
#include <linux/bitops.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/socket.h>
#include <linux/sockios.h>
#include <linux/in.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/if_ether.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/notifier.h>
#include <linux/netfilter.h>
#include <net/ip.h>
#include <net/route.h>
#include <linux/skbuff.h>
#include <net/sock.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 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 = (struct fw_head*)xchg(&tp->root, NULL);
	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 int
fw_change_attrs(struct tcf_proto *tp, struct fw_filter *f,
	struct rtattr **tb, struct rtattr **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-1], &e, &fw_ext_map);
	if (err < 0)
		return err;

	err = -EINVAL;
	if (tb[TCA_FW_CLASSID-1]) {
		if (RTA_PAYLOAD(tb[TCA_FW_CLASSID-1]) != sizeof(u32))
			goto errout;
		f->res.classid = *(u32*)RTA_DATA(tb[TCA_FW_CLASSID-1]);
		tcf_bind_filter(tp, &f->res, base);
	}

#ifdef CONFIG_NET_CLS_IND
	if (tb[TCA_FW_INDEV-1]) {
		err = tcf_change_indev(tp, f->indev, tb[TCA_FW_INDEV-1]);
		if (err < 0)
			goto errout;
	}
#endif /* CONFIG_NET_CLS_IND */

	if (tb[TCA_FW_MASK-1]) {
		if (RTA_PAYLOAD(tb[TCA_FW_MASK-1]) != sizeof(u32))
			goto errout;
		mask = *(u32*)RTA_DATA(tb[TCA_FW_MASK-1]);
		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 rtattr **tca,
		     unsigned long *arg)
{
	struct fw_head *head = (struct fw_head*)tp->root;
	struct fw_filter *f = (struct fw_filter *) *arg;
	struct rtattr *opt = tca[TCA_OPTIONS-1];
	struct rtattr *tb[TCA_FW_MAX];
	int err;

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

	if (rtattr_parse_nested(tb, TCA_FW_MAX, opt) < 0)
		return -EINVAL;

	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-1]) {
			if (RTA_PAYLOAD(tb[TCA_FW_MASK-1]) != sizeof(u32))
				return -EINVAL;
			mask = *(u32*)RTA_DATA(tb[TCA_FW_MASK-1]);
		}

		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 rtattr *rta;

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

	t->tcm_handle = f->id;

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

	rta = (struct rtattr*)b;
	RTA_PUT(skb, TCA_OPTIONS, 0, NULL);

	if (f->res.classid)
		RTA_PUT(skb, TCA_FW_CLASSID, 4, &f->res.classid);
#ifdef CONFIG_NET_CLS_IND
	if (strlen(f->indev))
		RTA_PUT(skb, TCA_FW_INDEV, IFNAMSIZ, f->indev);
#endif /* CONFIG_NET_CLS_IND */
	if (head->mask != 0xFFFFFFFF)
		RTA_PUT(skb, TCA_FW_MASK, 4, &head->mask);

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

	rta->rta_len = skb_tail_pointer(skb) - b;

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

	return skb->len;

rtattr_failure:
	skb_trim(skb, b - skb->data);
	return -1;
}

static struct tcf_proto_ops cls_fw_ops = {
	.next		=	NULL,
	.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 LT	21	#include <linux/module.h>
	22	#include <asm/uaccess.h>
	23	#include <asm/system.h>
	24	#include <linux/bitops.h>
	25	#include <linux/types.h>
	26	#include <linux/kernel.h>
1da177e4 LT	27	#include <linux/string.h>
	28	#include <linux/mm.h>
	29	#include <linux/socket.h>
	30	#include <linux/sockios.h>
	31	#include <linux/in.h>
	32	#include <linux/errno.h>
	33	#include <linux/interrupt.h>
	34	#include <linux/if_ether.h>
	35	#include <linux/inet.h>
	36	#include <linux/netdevice.h>
	37	#include <linux/etherdevice.h>
	38	#include <linux/notifier.h>
	39	#include <linux/netfilter.h>
	40	#include <net/ip.h>
	41	#include <net/route.h>
	42	#include <linux/skbuff.h>
	43	#include <net/sock.h>
	44	#include <net/act_api.h>
	45	#include <net/pkt_cls.h>
	46
c5c13faf TG	47	#define HTSIZE (PAGE_SIZE/sizeof(struct fw_filter *))
c5c13faf TG	48
1da177e4 LT	49	struct fw_head
1da177e4 LT	50	{
c5c13faf	51	struct fw_filter *ht[HTSIZE];
b4e9b520	52	u32 mask;
1da177e4 LT	53	};
	54
	55	struct fw_filter
	56	{
	57	struct fw_filter *next;
	58	u32 id;
	59	struct tcf_result res;
	60	#ifdef CONFIG_NET_CLS_IND
	61	char indev[IFNAMSIZ];
	62	#endif /* CONFIG_NET_CLS_IND */
	63	struct tcf_exts exts;
	64	};
	65
	66	static struct tcf_ext_map fw_ext_map = {
	67	.action = TCA_FW_ACT,
	68	.police = TCA_FW_POLICE
	69	};
	70
	71	static __inline__ int fw_hash(u32 handle)
	72	{
c5c13faf TG	73	if (HTSIZE == 4096)
	74	return ((handle >> 24) & 0xFFF) ^
	75	((handle >> 12) & 0xFFF) ^
	76	(handle & 0xFFF);
	77	else if (HTSIZE == 2048)
	78	return ((handle >> 22) & 0x7FF) ^
	79	((handle >> 11) & 0x7FF) ^
	80	(handle & 0x7FF);
	81	else if (HTSIZE == 1024)
	82	return ((handle >> 20) & 0x3FF) ^
	83	((handle >> 10) & 0x3FF) ^
	84	(handle & 0x3FF);
	85	else if (HTSIZE == 512)
	86	return (handle >> 27) ^
	87	((handle >> 18) & 0x1FF) ^
	88	((handle >> 9) & 0x1FF) ^
	89	(handle & 0x1FF);
	90	else if (HTSIZE == 256) {
	91	u8 t = (u8 ) &handle;
	92	return t[0] ^ t[1] ^ t[2] ^ t[3];
10297b99	93	} else
c5c13faf	94	return handle & (HTSIZE - 1);
1da177e4 LT	95	}
	96
	97	static int fw_classify(struct sk_buff skb, struct tcf_proto tp,
	98	struct tcf_result *res)
	99	{
	100	struct fw_head head = (struct fw_head)tp->root;
	101	struct fw_filter *f;
	102	int r;
5c804bfd	103	u32 id = skb->mark;
1da177e4 LT	104
1da177e4 LT	105	if (head != NULL) {
5c804bfd	106	id &= head->mask;
1da177e4 LT	107	for (f=head->ht[fw_hash(id)]; f; f=f->next) {
	108	if (f->id == id) {
	109	*res = f->res;
	110	#ifdef CONFIG_NET_CLS_IND
	111	if (!tcf_match_indev(skb, f->indev))
	112	continue;
	113	#endif /* CONFIG_NET_CLS_IND */
	114	r = tcf_exts_exec(skb, &f->exts, res);
	115	if (r < 0)
	116	continue;
	117
	118	return r;
	119	}
	120	}
	121	} else {
	122	/* old method */
	123	if (id && (TC_H_MAJ(id) == 0 \|\| !(TC_H_MAJ(id^tp->q->handle)))) {
	124	res->classid = id;
	125	res->class = 0;
	126	return 0;
	127	}
	128	}
	129
	130	return -1;
	131	}
	132
	133	static unsigned long fw_get(struct tcf_proto *tp, u32 handle)
	134	{
	135	struct fw_head head = (struct fw_head)tp->root;
	136	struct fw_filter *f;
	137
	138	if (head == NULL)
	139	return 0;
	140
	141	for (f=head->ht[fw_hash(handle)]; f; f=f->next) {
	142	if (f->id == handle)
	143	return (unsigned long)f;
	144	}
	145	return 0;
	146	}
	147
	148	static void fw_put(struct tcf_proto *tp, unsigned long f)
	149	{
	150	}
	151
	152	static int fw_init(struct tcf_proto *tp)
	153	{
	154	return 0;
	155	}
	156
	157	static inline void
	158	fw_delete_filter(struct tcf_proto tp, struct fw_filter f)
	159	{
	160	tcf_unbind_filter(tp, &f->res);
	161	tcf_exts_destroy(tp, &f->exts);
	162	kfree(f);
	163	}
	164
	165	static void fw_destroy(struct tcf_proto *tp)
	166	{
	167	struct fw_head head = (struct fw_head)xchg(&tp->root, NULL);
	168	struct fw_filter *f;
	169	int h;
	170
171	if (head == NULL)
172	return;
173
c5c13faf	174	for (h=0; h<HTSIZE; h++) {
1da177e4 LT	175	while ((f=head->ht[h]) != NULL) {
	176	head->ht[h] = f->next;
	177	fw_delete_filter(tp, f);
	178	}
	179	}
	180	kfree(head);
	181	}
	182
	183	static int fw_delete(struct tcf_proto *tp, unsigned long arg)
	184	{
	185	struct fw_head head = (struct fw_head)tp->root;
	186	struct fw_filter f = (struct fw_filter)arg;
	187	struct fw_filter **fp;
	188
	189	if (head == NULL \|\| f == NULL)
	190	goto out;
	191
	192	for (fp=&head->ht[fw_hash(f->id)]; fp; fp = &(fp)->next) {
	193	if (*fp == f) {
	194	tcf_tree_lock(tp);
	195	*fp = f->next;
	196	tcf_tree_unlock(tp);
	197	fw_delete_filter(tp, f);
	198	return 0;
	199	}
	200	}
	201	out:
	202	return -EINVAL;
	203	}
	204
	205	static int
	206	fw_change_attrs(struct tcf_proto tp, struct fw_filter f,
	207	struct rtattr tb, struct rtattr tca, unsigned long base)
	208	{
b4e9b520	209	struct fw_head head = (struct fw_head )tp->root;
1da177e4	210	struct tcf_exts e;
b4e9b520	211	u32 mask;
1da177e4 LT	212	int err;
	213
	214	err = tcf_exts_validate(tp, tb, tca[TCA_RATE-1], &e, &fw_ext_map);
	215	if (err < 0)
	216	return err;
	217
	218	err = -EINVAL;
	219	if (tb[TCA_FW_CLASSID-1]) {
	220	if (RTA_PAYLOAD(tb[TCA_FW_CLASSID-1]) != sizeof(u32))
	221	goto errout;
	222	f->res.classid = (u32)RTA_DATA(tb[TCA_FW_CLASSID-1]);
	223	tcf_bind_filter(tp, &f->res, base);
	224	}
	225
	226	#ifdef CONFIG_NET_CLS_IND
	227	if (tb[TCA_FW_INDEV-1]) {
	228	err = tcf_change_indev(tp, f->indev, tb[TCA_FW_INDEV-1]);
	229	if (err < 0)
	230	goto errout;
	231	}
	232	#endif /* CONFIG_NET_CLS_IND */
	233
b4e9b520 PM	234	if (tb[TCA_FW_MASK-1]) {
	235	if (RTA_PAYLOAD(tb[TCA_FW_MASK-1]) != sizeof(u32))
	236	goto errout;
	237	mask = (u32)RTA_DATA(tb[TCA_FW_MASK-1]);
	238	if (mask != head->mask)
	239	goto errout;
	240	} else if (head->mask != 0xFFFFFFFF)
	241	goto errout;
	242
1da177e4 LT	243	tcf_exts_change(tp, &f->exts, &e);
	244
	245	return 0;
	246	errout:
	247	tcf_exts_destroy(tp, &e);
	248	return err;
	249	}
	250
	251	static int fw_change(struct tcf_proto *tp, unsigned long base,
	252	u32 handle,
	253	struct rtattr **tca,
	254	unsigned long *arg)
	255	{
	256	struct fw_head head = (struct fw_head)tp->root;
	257	struct fw_filter f = (struct fw_filter ) *arg;
	258	struct rtattr *opt = tca[TCA_OPTIONS-1];
	259	struct rtattr *tb[TCA_FW_MAX];
	260	int err;
	261
	262	if (!opt)
	263	return handle ? -EINVAL : 0;
	264
	265	if (rtattr_parse_nested(tb, TCA_FW_MAX, opt) < 0)
	266	return -EINVAL;
	267
	268	if (f != NULL) {
	269	if (f->id != handle && handle)
	270	return -EINVAL;
	271	return fw_change_attrs(tp, f, tb, tca, base);
	272	}
	273
	274	if (!handle)
	275	return -EINVAL;
	276
	277	if (head == NULL) {
b4e9b520 PM	278	u32 mask = 0xFFFFFFFF;
	279	if (tb[TCA_FW_MASK-1]) {
	280	if (RTA_PAYLOAD(tb[TCA_FW_MASK-1]) != sizeof(u32))
	281	return -EINVAL;
	282	mask = (u32)RTA_DATA(tb[TCA_FW_MASK-1]);
	283	}
	284
0da974f4	285	head = kzalloc(sizeof(struct fw_head), GFP_KERNEL);
1da177e4 LT	286	if (head == NULL)
1da177e4 LT	287	return -ENOBUFS;
b4e9b520	288	head->mask = mask;
1da177e4 LT	289
	290	tcf_tree_lock(tp);
	291	tp->root = head;
	292	tcf_tree_unlock(tp);
	293	}
	294
0da974f4	295	f = kzalloc(sizeof(struct fw_filter), GFP_KERNEL);
1da177e4 LT	296	if (f == NULL)
1da177e4 LT	297	return -ENOBUFS;
1da177e4 LT	298
	299	f->id = handle;
	300
	301	err = fw_change_attrs(tp, f, tb, tca, base);
	302	if (err < 0)
	303	goto errout;
	304
	305	f->next = head->ht[fw_hash(handle)];
	306	tcf_tree_lock(tp);
	307	head->ht[fw_hash(handle)] = f;
	308	tcf_tree_unlock(tp);
	309
	310	*arg = (unsigned long)f;
	311	return 0;
	312
	313	errout:
a51482bd	314	kfree(f);
1da177e4 LT	315	return err;
	316	}
	317
	318	static void fw_walk(struct tcf_proto tp, struct tcf_walker arg)
	319	{
	320	struct fw_head head = (struct fw_head)tp->root;
	321	int h;
	322
	323	if (head == NULL)
	324	arg->stop = 1;
	325
	326	if (arg->stop)
	327	return;
	328
c5c13faf	329	for (h = 0; h < HTSIZE; h++) {
1da177e4 LT	330	struct fw_filter *f;
	331
	332	for (f = head->ht[h]; f; f = f->next) {
	333	if (arg->count < arg->skip) {
	334	arg->count++;
	335	continue;
	336	}
	337	if (arg->fn(tp, (unsigned long)f, arg) < 0) {
	338	arg->stop = 1;
	339	return;
	340	}
	341	arg->count++;
	342	}
	343	}
	344	}
	345
	346	static int fw_dump(struct tcf_proto *tp, unsigned long fh,
	347	struct sk_buff skb, struct tcmsg t)
	348	{
b4e9b520	349	struct fw_head head = (struct fw_head )tp->root;
1da177e4	350	struct fw_filter f = (struct fw_filter)fh;
27a884dc	351	unsigned char *b = skb_tail_pointer(skb);
1da177e4 LT	352	struct rtattr *rta;
	353
	354	if (f == NULL)
	355	return skb->len;
	356
	357	t->tcm_handle = f->id;
	358
	359	if (!f->res.classid && !tcf_exts_is_available(&f->exts))
	360	return skb->len;
	361
	362	rta = (struct rtattr*)b;
	363	RTA_PUT(skb, TCA_OPTIONS, 0, NULL);
	364
	365	if (f->res.classid)
	366	RTA_PUT(skb, TCA_FW_CLASSID, 4, &f->res.classid);
	367	#ifdef CONFIG_NET_CLS_IND
	368	if (strlen(f->indev))
	369	RTA_PUT(skb, TCA_FW_INDEV, IFNAMSIZ, f->indev);
	370	#endif /* CONFIG_NET_CLS_IND */
b4e9b520 PM	371	if (head->mask != 0xFFFFFFFF)
b4e9b520 PM	372	RTA_PUT(skb, TCA_FW_MASK, 4, &head->mask);
1da177e4 LT	373
	374	if (tcf_exts_dump(skb, &f->exts, &fw_ext_map) < 0)
	375	goto rtattr_failure;
	376
27a884dc	377	rta->rta_len = skb_tail_pointer(skb) - b;
1da177e4 LT	378
	379	if (tcf_exts_dump_stats(skb, &f->exts, &fw_ext_map) < 0)
	380	goto rtattr_failure;
	381
	382	return skb->len;
	383
	384	rtattr_failure:
	385	skb_trim(skb, b - skb->data);
	386	return -1;
	387	}
	388
	389	static struct tcf_proto_ops cls_fw_ops = {
	390	.next = NULL,
	391	.kind = "fw",
	392	.classify = fw_classify,
	393	.init = fw_init,
	394	.destroy = fw_destroy,
	395	.get = fw_get,
	396	.put = fw_put,
	397	.change = fw_change,
	398	.delete = fw_delete,
	399	.walk = fw_walk,
	400	.dump = fw_dump,
	401	.owner = THIS_MODULE,
	402	};
	403
	404	static int __init init_fw(void)
	405	{
	406	return register_tcf_proto_ops(&cls_fw_ops);
	407	}
	408
10297b99	409	static void __exit exit_fw(void)
1da177e4 LT	410	{
	411	unregister_tcf_proto_ops(&cls_fw_ops);
	412	}
	413
	414	module_init(init_fw)
	415	module_exit(exit_fw)
	416	MODULE_LICENSE("GPL");