Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

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");