1 files changed, 828 insertions, 0 deletions

diff --git a/net/sched/cls_u32.c b/net/sched/cls_u32.c
new file mode 100644
index 000000000000..364b87d86455
--- /dev/null
+++ b/net/sched/cls_u32.c
@@ -0,0 +1,828 @@
+/*
+ * net/sched/cls_u32.c	Ugly (or Universal) 32bit key Packet Classifier.
+ *
+ *		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>
+ *
+ *	The filters are packed to hash tables of key nodes
+ *	with a set of 32bit key/mask pairs at every node.
+ *	Nodes reference next level hash tables etc.
+ *
+ *	This scheme is the best universal classifier I managed to
+ *	invent; it is not super-fast, but it is not slow (provided you
+ *	program it correctly), and general enough.  And its relative
+ *	speed grows as the number of rules becomes larger.
+ *
+ *	It seems that it represents the best middle point between
+ *	speed and manageability both by human and by machine.
+ *
+ *	It is especially useful for link sharing combined with QoS;
+ *	pure RSVP doesn't need such a general approach and can use
+ *	much simpler (and faster) schemes, sort of cls_rsvp.c.
+ *
+ *	JHS: We should remove the CONFIG_NET_CLS_IND from here
+ *	eventually when the meta match extension is made available
+ *
+ *	nfmark match added by Catalin(ux aka Dino) BOIE <catab at umbrella.ro>
+ */
+
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <linux/bitops.h>
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/sched.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/rtnetlink.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>
+
+struct tc_u_knode
+{
+	struct tc_u_knode	*next;
+	u32			handle;
+	struct tc_u_hnode	*ht_up;
+	struct tcf_exts		exts;
+#ifdef CONFIG_NET_CLS_IND
+	char                     indev[IFNAMSIZ];
+#endif
+	u8			fshift;
+	struct tcf_result	res;
+	struct tc_u_hnode	*ht_down;
+#ifdef CONFIG_CLS_U32_PERF
+	struct tc_u32_pcnt	*pf;
+#endif
+#ifdef CONFIG_CLS_U32_MARK
+	struct tc_u32_mark	mark;
+#endif
+	struct tc_u32_sel	sel;
+};
+
+struct tc_u_hnode
+{
+	struct tc_u_hnode	*next;
+	u32			handle;
+	u32			prio;
+	struct tc_u_common	*tp_c;
+	int			refcnt;
+	unsigned		divisor;
+	struct tc_u_knode	*ht[1];
+};
+
+struct tc_u_common
+{
+	struct tc_u_common	*next;
+	struct tc_u_hnode	*hlist;
+	struct Qdisc		*q;
+	int			refcnt;
+	u32			hgenerator;
+};
+
+static struct tcf_ext_map u32_ext_map = {
+	.action = TCA_U32_ACT,
+	.police = TCA_U32_POLICE
+};
+
+static struct tc_u_common *u32_list;
+
+static __inline__ unsigned u32_hash_fold(u32 key, struct tc_u32_sel *sel, u8 fshift)
+{
+	unsigned h = (key & sel->hmask)>>fshift;
+
+	return h;
+}
+
+static int u32_classify(struct sk_buff *skb, struct tcf_proto *tp, struct tcf_result *res)
+{
+	struct {
+		struct tc_u_knode *knode;
+		u8		  *ptr;
+	} stack[TC_U32_MAXDEPTH];
+
+	struct tc_u_hnode *ht = (struct tc_u_hnode*)tp->root;
+	u8 *ptr = skb->nh.raw;
+	struct tc_u_knode *n;
+	int sdepth = 0;
+	int off2 = 0;
+	int sel = 0;
+#ifdef CONFIG_CLS_U32_PERF
+	int j;
+#endif
+	int i, r;
+
+next_ht:
+	n = ht->ht[sel];
+
+next_knode:
+	if (n) {
+		struct tc_u32_key *key = n->sel.keys;
+
+#ifdef CONFIG_CLS_U32_PERF
+		n->pf->rcnt +=1;
+		j = 0;
+#endif
+
+#ifdef CONFIG_CLS_U32_MARK
+		if ((skb->nfmark & n->mark.mask) != n->mark.val) {
+			n = n->next;
+			goto next_knode;
+		} else {
+			n->mark.success++;
+		}
+#endif
+
+		for (i = n->sel.nkeys; i>0; i--, key++) {
+
+			if ((*(u32*)(ptr+key->off+(off2&key->offmask))^key->val)&key->mask) {
+				n = n->next;
+				goto next_knode;
+			}
+#ifdef CONFIG_CLS_U32_PERF
+			n->pf->kcnts[j] +=1;
+			j++;
+#endif
+		}
+		if (n->ht_down == NULL) {
+check_terminal:
+			if (n->sel.flags&TC_U32_TERMINAL) {
+
+				*res = n->res;
+#ifdef CONFIG_NET_CLS_IND
+				if (!tcf_match_indev(skb, n->indev)) {
+					n = n->next;
+					goto next_knode;
+				}
+#endif
+#ifdef CONFIG_CLS_U32_PERF
+				n->pf->rhit +=1;
+#endif
+				r = tcf_exts_exec(skb, &n->exts, res);
+				if (r < 0) {
+					n = n->next;
+					goto next_knode;
+				}
+
+				return r;
+			}
+			n = n->next;
+			goto next_knode;
+		}
+
+		/* PUSH */
+		if (sdepth >= TC_U32_MAXDEPTH)
+			goto deadloop;
+		stack[sdepth].knode = n;
+		stack[sdepth].ptr = ptr;
+		sdepth++;
+
+		ht = n->ht_down;
+		sel = 0;
+		if (ht->divisor)
+			sel = ht->divisor&u32_hash_fold(*(u32*)(ptr+n->sel.hoff), &n->sel,n->fshift);
+
+		if (!(n->sel.flags&(TC_U32_VAROFFSET|TC_U32_OFFSET|TC_U32_EAT)))
+			goto next_ht;
+
+		if (n->sel.flags&(TC_U32_OFFSET|TC_U32_VAROFFSET)) {
+			off2 = n->sel.off + 3;
+			if (n->sel.flags&TC_U32_VAROFFSET)
+				off2 += ntohs(n->sel.offmask & *(u16*)(ptr+n->sel.offoff)) >>n->sel.offshift;
+			off2 &= ~3;
+		}
+		if (n->sel.flags&TC_U32_EAT) {
+			ptr += off2;
+			off2 = 0;
+		}
+
+		if (ptr < skb->tail)
+			goto next_ht;
+	}
+
+	/* POP */
+	if (sdepth--) {
+		n = stack[sdepth].knode;
+		ht = n->ht_up;
+		ptr = stack[sdepth].ptr;
+		goto check_terminal;
+	}
+	return -1;
+
+deadloop:
+	if (net_ratelimit())
+		printk("cls_u32: dead loop\n");
+	return -1;
+}
+
+static __inline__ struct tc_u_hnode *
+u32_lookup_ht(struct tc_u_common *tp_c, u32 handle)
+{
+	struct tc_u_hnode *ht;
+
+	for (ht = tp_c->hlist; ht; ht = ht->next)
+		if (ht->handle == handle)
+			break;
+
+	return ht;
+}
+
+static __inline__ struct tc_u_knode *
+u32_lookup_key(struct tc_u_hnode *ht, u32 handle)
+{
+	unsigned sel;
+	struct tc_u_knode *n = NULL;
+
+	sel = TC_U32_HASH(handle);
+	if (sel > ht->divisor)
+		goto out;
+
+	for (n = ht->ht[sel]; n; n = n->next)
+		if (n->handle == handle)
+			break;
+out:
+	return n;
+}
+
+
+static unsigned long u32_get(struct tcf_proto *tp, u32 handle)
+{
+	struct tc_u_hnode *ht;
+	struct tc_u_common *tp_c = tp->data;
+
+	if (TC_U32_HTID(handle) == TC_U32_ROOT)
+		ht = tp->root;
+	else
+		ht = u32_lookup_ht(tp_c, TC_U32_HTID(handle));
+
+	if (!ht)
+		return 0;
+
+	if (TC_U32_KEY(handle) == 0)
+		return (unsigned long)ht;
+
+	return (unsigned long)u32_lookup_key(ht, handle);
+}
+
+static void u32_put(struct tcf_proto *tp, unsigned long f)
+{
+}
+
+static u32 gen_new_htid(struct tc_u_common *tp_c)
+{
+	int i = 0x800;
+
+	do {
+		if (++tp_c->hgenerator == 0x7FF)
+			tp_c->hgenerator = 1;
+	} while (--i>0 && u32_lookup_ht(tp_c, (tp_c->hgenerator|0x800)<<20));
+
+	return i > 0 ? (tp_c->hgenerator|0x800)<<20 : 0;
+}
+
+static int u32_init(struct tcf_proto *tp)
+{
+	struct tc_u_hnode *root_ht;
+	struct tc_u_common *tp_c;
+
+	for (tp_c = u32_list; tp_c; tp_c = tp_c->next)
+		if (tp_c->q == tp->q)
+			break;
+
+	root_ht = kmalloc(sizeof(*root_ht), GFP_KERNEL);
+	if (root_ht == NULL)
+		return -ENOBUFS;
+
+	memset(root_ht, 0, sizeof(*root_ht));
+	root_ht->divisor = 0;
+	root_ht->refcnt++;
+	root_ht->handle = tp_c ? gen_new_htid(tp_c) : 0x80000000;
+	root_ht->prio = tp->prio;
+
+	if (tp_c == NULL) {
+		tp_c = kmalloc(sizeof(*tp_c), GFP_KERNEL);
+		if (tp_c == NULL) {
+			kfree(root_ht);
+			return -ENOBUFS;
+		}
+		memset(tp_c, 0, sizeof(*tp_c));
+		tp_c->q = tp->q;
+		tp_c->next = u32_list;
+		u32_list = tp_c;
+	}
+
+	tp_c->refcnt++;
+	root_ht->next = tp_c->hlist;
+	tp_c->hlist = root_ht;
+	root_ht->tp_c = tp_c;
+
+	tp->root = root_ht;
+	tp->data = tp_c;
+	return 0;
+}
+
+static int u32_destroy_key(struct tcf_proto *tp, struct tc_u_knode *n)
+{
+	tcf_unbind_filter(tp, &n->res);
+	tcf_exts_destroy(tp, &n->exts);
+	if (n->ht_down)
+		n->ht_down->refcnt--;
+#ifdef CONFIG_CLS_U32_PERF
+	if (n && (NULL != n->pf))
+		kfree(n->pf);
+#endif
+	kfree(n);
+	return 0;
+}
+
+static int u32_delete_key(struct tcf_proto *tp, struct tc_u_knode* key)
+{
+	struct tc_u_knode **kp;
+	struct tc_u_hnode *ht = key->ht_up;
+
+	if (ht) {
+		for (kp = &ht->ht[TC_U32_HASH(key->handle)]; *kp; kp = &(*kp)->next) {
+			if (*kp == key) {
+				tcf_tree_lock(tp);
+				*kp = key->next;
+				tcf_tree_unlock(tp);
+
+				u32_destroy_key(tp, key);
+				return 0;
+			}
+		}
+	}
+	BUG_TRAP(0);
+	return 0;
+}
+
+static void u32_clear_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht)
+{
+	struct tc_u_knode *n;
+	unsigned h;
+
+	for (h=0; h<=ht->divisor; h++) {
+		while ((n = ht->ht[h]) != NULL) {
+			ht->ht[h] = n->next;
+
+			u32_destroy_key(tp, n);
+		}
+	}
+}
+
+static int u32_destroy_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht)
+{
+	struct tc_u_common *tp_c = tp->data;
+	struct tc_u_hnode **hn;
+
+	BUG_TRAP(!ht->refcnt);
+
+	u32_clear_hnode(tp, ht);
+
+	for (hn = &tp_c->hlist; *hn; hn = &(*hn)->next) {
+		if (*hn == ht) {
+			*hn = ht->next;
+			kfree(ht);
+			return 0;
+		}
+	}
+
+	BUG_TRAP(0);
+	return -ENOENT;
+}
+
+static void u32_destroy(struct tcf_proto *tp)
+{
+	struct tc_u_common *tp_c = tp->data;
+	struct tc_u_hnode *root_ht = xchg(&tp->root, NULL);
+
+	BUG_TRAP(root_ht != NULL);
+
+	if (root_ht && --root_ht->refcnt == 0)
+		u32_destroy_hnode(tp, root_ht);
+
+	if (--tp_c->refcnt == 0) {
+		struct tc_u_hnode *ht;
+		struct tc_u_common **tp_cp;
+
+		for (tp_cp = &u32_list; *tp_cp; tp_cp = &(*tp_cp)->next) {
+			if (*tp_cp == tp_c) {
+				*tp_cp = tp_c->next;
+				break;
+			}
+		}
+
+		for (ht=tp_c->hlist; ht; ht = ht->next)
+			u32_clear_hnode(tp, ht);
+
+		while ((ht = tp_c->hlist) != NULL) {
+			tp_c->hlist = ht->next;
+
+			BUG_TRAP(ht->refcnt == 0);
+
+			kfree(ht);
+		};
+
+		kfree(tp_c);
+	}
+
+	tp->data = NULL;
+}
+
+static int u32_delete(struct tcf_proto *tp, unsigned long arg)
+{
+	struct tc_u_hnode *ht = (struct tc_u_hnode*)arg;
+
+	if (ht == NULL)
+		return 0;
+
+	if (TC_U32_KEY(ht->handle))
+		return u32_delete_key(tp, (struct tc_u_knode*)ht);
+
+	if (tp->root == ht)
+		return -EINVAL;
+
+	if (--ht->refcnt == 0)
+		u32_destroy_hnode(tp, ht);
+
+	return 0;
+}
+
+static u32 gen_new_kid(struct tc_u_hnode *ht, u32 handle)
+{
+	struct tc_u_knode *n;
+	unsigned i = 0x7FF;
+
+	for (n=ht->ht[TC_U32_HASH(handle)]; n; n = n->next)
+		if (i < TC_U32_NODE(n->handle))
+			i = TC_U32_NODE(n->handle);
+	i++;
+
+	return handle|(i>0xFFF ? 0xFFF : i);
+}
+
+static int u32_set_parms(struct tcf_proto *tp, unsigned long base,
+			 struct tc_u_hnode *ht,
+			 struct tc_u_knode *n, struct rtattr **tb,
+			 struct rtattr *est)
+{
+	int err;
+	struct tcf_exts e;
+
+	err = tcf_exts_validate(tp, tb, est, &e, &u32_ext_map);
+	if (err < 0)
+		return err;
+
+	err = -EINVAL;
+	if (tb[TCA_U32_LINK-1]) {
+		u32 handle = *(u32*)RTA_DATA(tb[TCA_U32_LINK-1]);
+		struct tc_u_hnode *ht_down = NULL;
+
+		if (TC_U32_KEY(handle))
+			goto errout;
+
+		if (handle) {
+			ht_down = u32_lookup_ht(ht->tp_c, handle);
+
+			if (ht_down == NULL)
+				goto errout;
+			ht_down->refcnt++;
+		}
+
+		tcf_tree_lock(tp);
+		ht_down = xchg(&n->ht_down, ht_down);
+		tcf_tree_unlock(tp);
+
+		if (ht_down)
+			ht_down->refcnt--;
+	}
+	if (tb[TCA_U32_CLASSID-1]) {
+		n->res.classid = *(u32*)RTA_DATA(tb[TCA_U32_CLASSID-1]);
+		tcf_bind_filter(tp, &n->res, base);
+	}
+
+#ifdef CONFIG_NET_CLS_IND
+	if (tb[TCA_U32_INDEV-1]) {
+		int err = tcf_change_indev(tp, n->indev, tb[TCA_U32_INDEV-1]);
+		if (err < 0)
+			goto errout;
+	}
+#endif
+	tcf_exts_change(tp, &n->exts, &e);
+
+	return 0;
+errout:
+	tcf_exts_destroy(tp, &e);
+	return err;
+}
+
+static int u32_change(struct tcf_proto *tp, unsigned long base, u32 handle,
+		      struct rtattr **tca,
+		      unsigned long *arg)
+{
+	struct tc_u_common *tp_c = tp->data;
+	struct tc_u_hnode *ht;
+	struct tc_u_knode *n;
+	struct tc_u32_sel *s;
+	struct rtattr *opt = tca[TCA_OPTIONS-1];
+	struct rtattr *tb[TCA_U32_MAX];
+	u32 htid;
+	int err;
+
+	if (opt == NULL)
+		return handle ? -EINVAL : 0;
+
+	if (rtattr_parse_nested(tb, TCA_U32_MAX, opt) < 0)
+		return -EINVAL;
+
+	if ((n = (struct tc_u_knode*)*arg) != NULL) {
+		if (TC_U32_KEY(n->handle) == 0)
+			return -EINVAL;
+
+		return u32_set_parms(tp, base, n->ht_up, n, tb, tca[TCA_RATE-1]);
+	}
+
+	if (tb[TCA_U32_DIVISOR-1]) {
+		unsigned divisor = *(unsigned*)RTA_DATA(tb[TCA_U32_DIVISOR-1]);
+
+		if (--divisor > 0x100)
+			return -EINVAL;
+		if (TC_U32_KEY(handle))
+			return -EINVAL;
+		if (handle == 0) {
+			handle = gen_new_htid(tp->data);
+			if (handle == 0)
+				return -ENOMEM;
+		}
+		ht = kmalloc(sizeof(*ht) + divisor*sizeof(void*), GFP_KERNEL);
+		if (ht == NULL)
+			return -ENOBUFS;
+		memset(ht, 0, sizeof(*ht) + divisor*sizeof(void*));
+		ht->tp_c = tp_c;
+		ht->refcnt = 0;
+		ht->divisor = divisor;
+		ht->handle = handle;
+		ht->prio = tp->prio;
+		ht->next = tp_c->hlist;
+		tp_c->hlist = ht;
+		*arg = (unsigned long)ht;
+		return 0;
+	}
+
+	if (tb[TCA_U32_HASH-1]) {
+		htid = *(unsigned*)RTA_DATA(tb[TCA_U32_HASH-1]);
+		if (TC_U32_HTID(htid) == TC_U32_ROOT) {
+			ht = tp->root;
+			htid = ht->handle;
+		} else {
+			ht = u32_lookup_ht(tp->data, TC_U32_HTID(htid));
+			if (ht == NULL)
+				return -EINVAL;
+		}
+	} else {
+		ht = tp->root;
+		htid = ht->handle;
+	}
+
+	if (ht->divisor < TC_U32_HASH(htid))
+		return -EINVAL;
+
+	if (handle) {
+		if (TC_U32_HTID(handle) && TC_U32_HTID(handle^htid))
+			return -EINVAL;
+		handle = htid | TC_U32_NODE(handle);
+	} else
+		handle = gen_new_kid(ht, htid);
+
+	if (tb[TCA_U32_SEL-1] == 0 ||
+	    RTA_PAYLOAD(tb[TCA_U32_SEL-1]) < sizeof(struct tc_u32_sel))
+		return -EINVAL;
+
+	s = RTA_DATA(tb[TCA_U32_SEL-1]);
+
+	n = kmalloc(sizeof(*n) + s->nkeys*sizeof(struct tc_u32_key), GFP_KERNEL);
+	if (n == NULL)
+		return -ENOBUFS;
+
+	memset(n, 0, sizeof(*n) + s->nkeys*sizeof(struct tc_u32_key));
+#ifdef CONFIG_CLS_U32_PERF
+	n->pf = kmalloc(sizeof(struct tc_u32_pcnt) + s->nkeys*sizeof(u64), GFP_KERNEL);
+	if (n->pf == NULL) {
+		kfree(n);
+		return -ENOBUFS;
+	}
+	memset(n->pf, 0, sizeof(struct tc_u32_pcnt) + s->nkeys*sizeof(u64));
+#endif
+
+	memcpy(&n->sel, s, sizeof(*s) + s->nkeys*sizeof(struct tc_u32_key));
+	n->ht_up = ht;
+	n->handle = handle;
+{
+	u8 i = 0;
+	u32 mask = s->hmask;
+	if (mask) {
+		while (!(mask & 1)) {
+			i++;
+			mask>>=1;
+		}
+	}
+	n->fshift = i;
+}
+
+#ifdef CONFIG_CLS_U32_MARK
+	if (tb[TCA_U32_MARK-1]) {
+		struct tc_u32_mark *mark;
+
+		if (RTA_PAYLOAD(tb[TCA_U32_MARK-1]) < sizeof(struct tc_u32_mark)) {
+#ifdef CONFIG_CLS_U32_PERF
+			kfree(n->pf);
+#endif
+			kfree(n);
+			return -EINVAL;
+		}
+		mark = RTA_DATA(tb[TCA_U32_MARK-1]);
+		memcpy(&n->mark, mark, sizeof(struct tc_u32_mark));
+		n->mark.success = 0;
+	}
+#endif
+
+	err = u32_set_parms(tp, base, ht, n, tb, tca[TCA_RATE-1]);
+	if (err == 0) {
+		struct tc_u_knode **ins;
+		for (ins = &ht->ht[TC_U32_HASH(handle)]; *ins; ins = &(*ins)->next)
+			if (TC_U32_NODE(handle) < TC_U32_NODE((*ins)->handle))
+				break;
+
+		n->next = *ins;
+		wmb();
+		*ins = n;
+
+		*arg = (unsigned long)n;
+		return 0;
+	}
+#ifdef CONFIG_CLS_U32_PERF
+	if (n && (NULL != n->pf))
+		kfree(n->pf);
+#endif
+	kfree(n);
+	return err;
+}
+
+static void u32_walk(struct tcf_proto *tp, struct tcf_walker *arg)
+{
+	struct tc_u_common *tp_c = tp->data;
+	struct tc_u_hnode *ht;
+	struct tc_u_knode *n;
+	unsigned h;
+
+	if (arg->stop)
+		return;
+
+	for (ht = tp_c->hlist; ht; ht = ht->next) {
+		if (ht->prio != tp->prio)
+			continue;
+		if (arg->count >= arg->skip) {
+			if (arg->fn(tp, (unsigned long)ht, arg) < 0) {
+				arg->stop = 1;
+				return;
+			}
+		}
+		arg->count++;
+		for (h = 0; h <= ht->divisor; h++) {
+			for (n = ht->ht[h]; n; n = n->next) {
+				if (arg->count < arg->skip) {
+					arg->count++;
+					continue;
+				}
+				if (arg->fn(tp, (unsigned long)n, arg) < 0) {
+					arg->stop = 1;
+					return;
+				}
+				arg->count++;
+			}
+		}
+	}
+}
+
+static int u32_dump(struct tcf_proto *tp, unsigned long fh,
+		     struct sk_buff *skb, struct tcmsg *t)
+{
+	struct tc_u_knode *n = (struct tc_u_knode*)fh;
+	unsigned char	 *b = skb->tail;
+	struct rtattr *rta;
+
+	if (n == NULL)
+		return skb->len;
+
+	t->tcm_handle = n->handle;
+
+	rta = (struct rtattr*)b;
+	RTA_PUT(skb, TCA_OPTIONS, 0, NULL);
+
+	if (TC_U32_KEY(n->handle) == 0) {
+		struct tc_u_hnode *ht = (struct tc_u_hnode*)fh;
+		u32 divisor = ht->divisor+1;
+		RTA_PUT(skb, TCA_U32_DIVISOR, 4, &divisor);
+	} else {
+		RTA_PUT(skb, TCA_U32_SEL,
+			sizeof(n->sel) + n->sel.nkeys*sizeof(struct tc_u32_key),
+			&n->sel);
+		if (n->ht_up) {
+			u32 htid = n->handle & 0xFFFFF000;
+			RTA_PUT(skb, TCA_U32_HASH, 4, &htid);
+		}
+		if (n->res.classid)
+			RTA_PUT(skb, TCA_U32_CLASSID, 4, &n->res.classid);
+		if (n->ht_down)
+			RTA_PUT(skb, TCA_U32_LINK, 4, &n->ht_down->handle);
+
+#ifdef CONFIG_CLS_U32_MARK
+		if (n->mark.val || n->mark.mask)
+			RTA_PUT(skb, TCA_U32_MARK, sizeof(n->mark), &n->mark);
+#endif
+
+		if (tcf_exts_dump(skb, &n->exts, &u32_ext_map) < 0)
+			goto rtattr_failure;
+
+#ifdef CONFIG_NET_CLS_IND
+		if(strlen(n->indev))
+			RTA_PUT(skb, TCA_U32_INDEV, IFNAMSIZ, n->indev);
+#endif
+#ifdef CONFIG_CLS_U32_PERF
+		RTA_PUT(skb, TCA_U32_PCNT, 
+		sizeof(struct tc_u32_pcnt) + n->sel.nkeys*sizeof(u64),
+			n->pf);
+#endif
+	}
+
+	rta->rta_len = skb->tail - b;
+	if (TC_U32_KEY(n->handle))
+		if (tcf_exts_dump_stats(skb, &n->exts, &u32_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_u32_ops = {
+	.next		=	NULL,
+	.kind		=	"u32",
+	.classify	=	u32_classify,
+	.init		=	u32_init,
+	.destroy	=	u32_destroy,
+	.get		=	u32_get,
+	.put		=	u32_put,
+	.change		=	u32_change,
+	.delete		=	u32_delete,
+	.walk		=	u32_walk,
+	.dump		=	u32_dump,
+	.owner		=	THIS_MODULE,
+};
+
+static int __init init_u32(void)
+{
+	printk("u32 classifier\n");
+#ifdef CONFIG_CLS_U32_PERF
+	printk("    Perfomance counters on\n");
+#endif
+#ifdef CONFIG_NET_CLS_POLICE
+	printk("    OLD policer on \n");
+#endif
+#ifdef CONFIG_NET_CLS_IND
+	printk("    input device check on \n");
+#endif
+#ifdef CONFIG_NET_CLS_ACT
+	printk("    Actions configured \n");
+#endif
+	return register_tcf_proto_ops(&cls_u32_ops);
+}
+
+static void __exit exit_u32(void) 
+{
+	unregister_tcf_proto_ops(&cls_u32_ops);
+}
+
+module_init(init_u32)
+module_exit(exit_u32)
+MODULE_LICENSE("GPL");