net: convert BUG_TRAP to generic WARN_ON
[linux-3.10.git] / net / sched / act_api.c
index 2ce1cb2..d308c19 100644 (file)
  *
  */
 
-#include <asm/uaccess.h>
-#include <asm/system.h>
-#include <linux/bitops.h>
-#include <linux/config.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/netdevice.h>
 #include <linux/skbuff.h>
-#include <linux/rtnetlink.h>
 #include <linux/init.h>
 #include <linux/kmod.h>
+#include <linux/err.h>
+#include <net/net_namespace.h>
 #include <net/sock.h>
 #include <net/sch_generic.h>
 #include <net/act_api.h>
+#include <net/netlink.h>
 
-#if 0 /* control */
-#define DPRINTK(format, args...) printk(KERN_DEBUG format, ##args)
-#else
-#define DPRINTK(format, args...)
-#endif
-#if 0 /* data */
-#define D2PRINTK(format, args...) printk(KERN_DEBUG format, ##args)
-#else
-#define D2PRINTK(format, args...)
-#endif
+void tcf_hash_destroy(struct tcf_common *p, struct tcf_hashinfo *hinfo)
+{
+       unsigned int h = tcf_hash(p->tcfc_index, hinfo->hmask);
+       struct tcf_common **p1p;
+
+       for (p1p = &hinfo->htab[h]; *p1p; p1p = &(*p1p)->tcfc_next) {
+               if (*p1p == p) {
+                       write_lock_bh(hinfo->lock);
+                       *p1p = p->tcfc_next;
+                       write_unlock_bh(hinfo->lock);
+                       gen_kill_estimator(&p->tcfc_bstats,
+                                          &p->tcfc_rate_est);
+                       kfree(p);
+                       return;
+               }
+       }
+       WARN_ON(1);
+}
+EXPORT_SYMBOL(tcf_hash_destroy);
+
+int tcf_hash_release(struct tcf_common *p, int bind,
+                    struct tcf_hashinfo *hinfo)
+{
+       int ret = 0;
+
+       if (p) {
+               if (bind)
+                       p->tcfc_bindcnt--;
+
+               p->tcfc_refcnt--;
+               if (p->tcfc_bindcnt <= 0 && p->tcfc_refcnt <= 0) {
+                       tcf_hash_destroy(p, hinfo);
+                       ret = 1;
+               }
+       }
+       return ret;
+}
+EXPORT_SYMBOL(tcf_hash_release);
+
+static int tcf_dump_walker(struct sk_buff *skb, struct netlink_callback *cb,
+                          struct tc_action *a, struct tcf_hashinfo *hinfo)
+{
+       struct tcf_common *p;
+       int err = 0, index = -1,i = 0, s_i = 0, n_i = 0;
+       struct nlattr *nest;
+
+       read_lock_bh(hinfo->lock);
+
+       s_i = cb->args[0];
+
+       for (i = 0; i < (hinfo->hmask + 1); i++) {
+               p = hinfo->htab[tcf_hash(i, hinfo->hmask)];
+
+               for (; p; p = p->tcfc_next) {
+                       index++;
+                       if (index < s_i)
+                               continue;
+                       a->priv = p;
+                       a->order = n_i;
+
+                       nest = nla_nest_start(skb, a->order);
+                       if (nest == NULL)
+                               goto nla_put_failure;
+                       err = tcf_action_dump_1(skb, a, 0, 0);
+                       if (err < 0) {
+                               index--;
+                               nlmsg_trim(skb, nest);
+                               goto done;
+                       }
+                       nla_nest_end(skb, nest);
+                       n_i++;
+                       if (n_i >= TCA_ACT_MAX_PRIO)
+                               goto done;
+               }
+       }
+done:
+       read_unlock_bh(hinfo->lock);
+       if (n_i)
+               cb->args[0] += n_i;
+       return n_i;
+
+nla_put_failure:
+       nla_nest_cancel(skb, nest);
+       goto done;
+}
+
+static int tcf_del_walker(struct sk_buff *skb, struct tc_action *a,
+                         struct tcf_hashinfo *hinfo)
+{
+       struct tcf_common *p, *s_p;
+       struct nlattr *nest;
+       int i= 0, n_i = 0;
+
+       nest = nla_nest_start(skb, a->order);
+       if (nest == NULL)
+               goto nla_put_failure;
+       NLA_PUT_STRING(skb, TCA_KIND, a->ops->kind);
+       for (i = 0; i < (hinfo->hmask + 1); i++) {
+               p = hinfo->htab[tcf_hash(i, hinfo->hmask)];
+
+               while (p != NULL) {
+                       s_p = p->tcfc_next;
+                       if (ACT_P_DELETED == tcf_hash_release(p, 0, hinfo))
+                                module_put(a->ops->owner);
+                       n_i++;
+                       p = s_p;
+               }
+       }
+       NLA_PUT_U32(skb, TCA_FCNT, n_i);
+       nla_nest_end(skb, nest);
+
+       return n_i;
+nla_put_failure:
+       nla_nest_cancel(skb, nest);
+       return -EINVAL;
+}
+
+int tcf_generic_walker(struct sk_buff *skb, struct netlink_callback *cb,
+                      int type, struct tc_action *a)
+{
+       struct tcf_hashinfo *hinfo = a->ops->hinfo;
+
+       if (type == RTM_DELACTION) {
+               return tcf_del_walker(skb, a, hinfo);
+       } else if (type == RTM_GETACTION) {
+               return tcf_dump_walker(skb, cb, a, hinfo);
+       } else {
+               printk("tcf_generic_walker: unknown action %d\n", type);
+               return -EINVAL;
+       }
+}
+EXPORT_SYMBOL(tcf_generic_walker);
+
+struct tcf_common *tcf_hash_lookup(u32 index, struct tcf_hashinfo *hinfo)
+{
+       struct tcf_common *p;
+
+       read_lock_bh(hinfo->lock);
+       for (p = hinfo->htab[tcf_hash(index, hinfo->hmask)]; p;
+            p = p->tcfc_next) {
+               if (p->tcfc_index == index)
+                       break;
+       }
+       read_unlock_bh(hinfo->lock);
+
+       return p;
+}
+EXPORT_SYMBOL(tcf_hash_lookup);
+
+u32 tcf_hash_new_index(u32 *idx_gen, struct tcf_hashinfo *hinfo)
+{
+       u32 val = *idx_gen;
+
+       do {
+               if (++val == 0)
+                       val = 1;
+       } while (tcf_hash_lookup(val, hinfo));
+
+       return (*idx_gen = val);
+}
+EXPORT_SYMBOL(tcf_hash_new_index);
+
+int tcf_hash_search(struct tc_action *a, u32 index)
+{
+       struct tcf_hashinfo *hinfo = a->ops->hinfo;
+       struct tcf_common *p = tcf_hash_lookup(index, hinfo);
+
+       if (p) {
+               a->priv = p;
+               return 1;
+       }
+       return 0;
+}
+EXPORT_SYMBOL(tcf_hash_search);
+
+struct tcf_common *tcf_hash_check(u32 index, struct tc_action *a, int bind,
+                                 struct tcf_hashinfo *hinfo)
+{
+       struct tcf_common *p = NULL;
+       if (index && (p = tcf_hash_lookup(index, hinfo)) != NULL) {
+               if (bind) {
+                       p->tcfc_bindcnt++;
+                       p->tcfc_refcnt++;
+               }
+               a->priv = p;
+       }
+       return p;
+}
+EXPORT_SYMBOL(tcf_hash_check);
+
+struct tcf_common *tcf_hash_create(u32 index, struct nlattr *est, struct tc_action *a, int size, int bind, u32 *idx_gen, struct tcf_hashinfo *hinfo)
+{
+       struct tcf_common *p = kzalloc(size, GFP_KERNEL);
+
+       if (unlikely(!p))
+               return p;
+       p->tcfc_refcnt = 1;
+       if (bind)
+               p->tcfc_bindcnt = 1;
+
+       spin_lock_init(&p->tcfc_lock);
+       p->tcfc_index = index ? index : tcf_hash_new_index(idx_gen, hinfo);
+       p->tcfc_tm.install = jiffies;
+       p->tcfc_tm.lastuse = jiffies;
+       if (est)
+               gen_new_estimator(&p->tcfc_bstats, &p->tcfc_rate_est,
+                                 &p->tcfc_lock, est);
+       a->priv = (void *) p;
+       return p;
+}
+EXPORT_SYMBOL(tcf_hash_create);
+
+void tcf_hash_insert(struct tcf_common *p, struct tcf_hashinfo *hinfo)
+{
+       unsigned int h = tcf_hash(p->tcfc_index, hinfo->hmask);
+
+       write_lock_bh(hinfo->lock);
+       p->tcfc_next = hinfo->htab[h];
+       hinfo->htab[h] = p;
+       write_unlock_bh(hinfo->lock);
+}
+EXPORT_SYMBOL(tcf_hash_insert);
 
 static struct tc_action_ops *act_base = NULL;
 static DEFINE_RWLOCK(act_mod_lock);
@@ -64,6 +267,7 @@ int tcf_register_action(struct tc_action_ops *act)
        write_unlock(&act_mod_lock);
        return 0;
 }
+EXPORT_SYMBOL(tcf_register_action);
 
 int tcf_unregister_action(struct tc_action_ops *act)
 {
@@ -82,6 +286,7 @@ int tcf_unregister_action(struct tc_action_ops *act)
        write_unlock(&act_mod_lock);
        return err;
 }
+EXPORT_SYMBOL(tcf_unregister_action);
 
 /* lookup by name */
 static struct tc_action_ops *tc_lookup_action_n(char *kind)
@@ -104,15 +309,15 @@ static struct tc_action_ops *tc_lookup_action_n(char *kind)
        return a;
 }
 
-/* lookup by rtattr */
-static struct tc_action_ops *tc_lookup_action(struct rtattr *kind)
+/* lookup by nlattr */
+static struct tc_action_ops *tc_lookup_action(struct nlattr *kind)
 {
        struct tc_action_ops *a = NULL;
 
        if (kind) {
                read_lock(&act_mod_lock);
                for (a = act_base; a; a = a->next) {
-                       if (rtattr_strcmp(kind, a->kind) == 0) {
+                       if (nla_strcmp(kind, a->kind) == 0) {
                                if (!try_module_get(a->owner)) {
                                        read_unlock(&act_mod_lock);
                                        return NULL;
@@ -149,23 +354,20 @@ static struct tc_action_ops *tc_lookup_action_id(u32 type)
 #endif
 
 int tcf_action_exec(struct sk_buff *skb, struct tc_action *act,
-                    struct tcf_result *res)
+                   struct tcf_result *res)
 {
        struct tc_action *a;
        int ret = -1;
 
        if (skb->tc_verd & TC_NCLS) {
                skb->tc_verd = CLR_TC_NCLS(skb->tc_verd);
-               D2PRINTK("(%p)tcf_action_exec: cleared TC_NCLS in %s out %s\n",
-                        skb, skb->input_dev ? skb->input_dev->name : "xxx",
-                        skb->dev->name);
                ret = TC_ACT_OK;
                goto exec_done;
        }
        while ((a = act) != NULL) {
 repeat:
                if (a->ops && a->ops->act) {
-                       ret = a->ops->act(&skb, a, res);
+                       ret = a->ops->act(skb, a, res);
                        if (TC_MUNGED & skb->tc_verd) {
                                /* copied already, allow trampling */
                                skb->tc_verd = SET_TC_OK2MUNGE(skb->tc_verd);
@@ -181,6 +383,7 @@ repeat:
 exec_done:
        return ret;
 }
+EXPORT_SYMBOL(tcf_action_exec);
 
 void tcf_action_destroy(struct tc_action *act, int bind)
 {
@@ -188,8 +391,6 @@ void tcf_action_destroy(struct tc_action *act, int bind)
 
        for (a = act; a; a = act) {
                if (a->ops && a->ops->cleanup) {
-                       DPRINTK("tcf_action_destroy destroying %p next %p\n",
-                               a, a->next);
                        if (a->ops->cleanup(a, bind) == ACT_P_DELETED)
                                module_put(a->ops->owner);
                        act = act->next;
@@ -216,72 +417,78 @@ int
 tcf_action_dump_1(struct sk_buff *skb, struct tc_action *a, int bind, int ref)
 {
        int err = -EINVAL;
-       unsigned char *b = skb->tail;
-       struct rtattr *r;
+       unsigned char *b = skb_tail_pointer(skb);
+       struct nlattr *nest;
 
        if (a->ops == NULL || a->ops->dump == NULL)
                return err;
 
-       RTA_PUT(skb, TCA_KIND, IFNAMSIZ, a->ops->kind);
+       NLA_PUT_STRING(skb, TCA_KIND, a->ops->kind);
        if (tcf_action_copy_stats(skb, a, 0))
-               goto rtattr_failure;
-       r = (struct rtattr*) skb->tail;
-       RTA_PUT(skb, TCA_OPTIONS, 0, NULL);
+               goto nla_put_failure;
+       nest = nla_nest_start(skb, TCA_OPTIONS);
+       if (nest == NULL)
+               goto nla_put_failure;
        if ((err = tcf_action_dump_old(skb, a, bind, ref)) > 0) {
-               r->rta_len = skb->tail - (u8*)r;
+               nla_nest_end(skb, nest);
                return err;
        }
 
-rtattr_failure:
-       skb_trim(skb, b - skb->data);
+nla_put_failure:
+       nlmsg_trim(skb, b);
        return -1;
 }
+EXPORT_SYMBOL(tcf_action_dump_1);
 
 int
 tcf_action_dump(struct sk_buff *skb, struct tc_action *act, int bind, int ref)
 {
        struct tc_action *a;
        int err = -EINVAL;
-       unsigned char *b = skb->tail;
-       struct rtattr *r ;
+       struct nlattr *nest;
 
        while ((a = act) != NULL) {
-               r = (struct rtattr*) skb->tail;
                act = a->next;
-               RTA_PUT(skb, a->order, 0, NULL);
+               nest = nla_nest_start(skb, a->order);
+               if (nest == NULL)
+                       goto nla_put_failure;
                err = tcf_action_dump_1(skb, a, bind, ref);
                if (err < 0)
-                       goto rtattr_failure;
-               r->rta_len = skb->tail - (u8*)r;
+                       goto errout;
+               nla_nest_end(skb, nest);
        }
 
        return 0;
 
-rtattr_failure:
-       skb_trim(skb, b - skb->data);
-       return -err;
+nla_put_failure:
+       err = -EINVAL;
+errout:
+       nla_nest_cancel(skb, nest);
+       return err;
 }
 
-struct tc_action *tcf_action_init_1(struct rtattr *rta, struct rtattr *est,
-                                    char *name, int ovr, int bind, int *err)
+struct tc_action *tcf_action_init_1(struct nlattr *nla, struct nlattr *est,
+                                   char *name, int ovr, int bind)
 {
        struct tc_action *a;
        struct tc_action_ops *a_o;
        char act_name[IFNAMSIZ];
-       struct rtattr *tb[TCA_ACT_MAX+1];
-       struct rtattr *kind;
-
-       *err = -EINVAL;
+       struct nlattr *tb[TCA_ACT_MAX+1];
+       struct nlattr *kind;
+       int err;
 
        if (name == NULL) {
-               if (rtattr_parse_nested(tb, TCA_ACT_MAX, rta) < 0)
+               err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL);
+               if (err < 0)
                        goto err_out;
-               kind = tb[TCA_ACT_KIND-1];
+               err = -EINVAL;
+               kind = tb[TCA_ACT_KIND];
                if (kind == NULL)
                        goto err_out;
-               if (rtattr_strlcpy(act_name, kind, IFNAMSIZ) >= IFNAMSIZ)
+               if (nla_strlcpy(act_name, kind, IFNAMSIZ) >= IFNAMSIZ)
                        goto err_out;
        } else {
+               err = -EINVAL;
                if (strlcpy(act_name, name, IFNAMSIZ) >= IFNAMSIZ)
                        goto err_out;
        }
@@ -290,7 +497,7 @@ struct tc_action *tcf_action_init_1(struct rtattr *rta, struct rtattr *est,
        if (a_o == NULL) {
 #ifdef CONFIG_KMOD
                rtnl_unlock();
-               request_module(act_name);
+               request_module("act_%s", act_name);
                rtnl_lock();
 
                a_o = tc_lookup_action_n(act_name);
@@ -302,37 +509,35 @@ struct tc_action *tcf_action_init_1(struct rtattr *rta, struct rtattr *est,
                 * indicate this using -EAGAIN.
                 */
                if (a_o != NULL) {
-                       *err = -EAGAIN;
+                       err = -EAGAIN;
                        goto err_mod;
                }
 #endif
+               err = -ENOENT;
                goto err_out;
        }
 
-       *err = -ENOMEM;
-       a = kmalloc(sizeof(*a), GFP_KERNEL);
+       err = -ENOMEM;
+       a = kzalloc(sizeof(*a), GFP_KERNEL);
        if (a == NULL)
                goto err_mod;
-       memset(a, 0, sizeof(*a));
 
        /* backward compatibility for policer */
        if (name == NULL)
-               *err = a_o->init(tb[TCA_ACT_OPTIONS-1], est, a, ovr, bind);
+               err = a_o->init(tb[TCA_ACT_OPTIONS], est, a, ovr, bind);
        else
-               *err = a_o->init(rta, est, a, ovr, bind);
-       if (*err < 0)
+               err = a_o->init(nla, est, a, ovr, bind);
+       if (err < 0)
                goto err_free;
 
        /* module count goes up only when brand new policy is created
           if it exists and is only bound to in a_o->init() then
           ACT_P_CREATED is not returned (a zero is).
        */
-       if (*err != ACT_P_CREATED)
+       if (err != ACT_P_CREATED)
                module_put(a_o->owner);
        a->ops = a_o;
-       DPRINTK("tcf_action_init_1: successfull %s\n", act_name);
 
-       *err = 0;
        return a;
 
 err_free:
@@ -340,26 +545,26 @@ err_free:
 err_mod:
        module_put(a_o->owner);
 err_out:
-       return NULL;
+       return ERR_PTR(err);
 }
 
-struct tc_action *tcf_action_init(struct rtattr *rta, struct rtattr *est,
-                                  char *name, int ovr, int bind, int *err)
+struct tc_action *tcf_action_init(struct nlattr *nla, struct nlattr *est,
+                                 char *name, int ovr, int bind)
 {
-       struct rtattr *tb[TCA_ACT_MAX_PRIO+1];
+       struct nlattr *tb[TCA_ACT_MAX_PRIO+1];
        struct tc_action *head = NULL, *act, *act_prev = NULL;
+       int err;
        int i;
 
-       if (rtattr_parse_nested(tb, TCA_ACT_MAX_PRIO, rta) < 0) {
-               *err = -EINVAL;
-               return head;
-       }
+       err = nla_parse_nested(tb, TCA_ACT_MAX_PRIO, nla, NULL);
+       if (err < 0)
+               return ERR_PTR(err);
 
-       for (i=0; i < TCA_ACT_MAX_PRIO && tb[i]; i++) {
-               act = tcf_action_init_1(tb[i], est, name, ovr, bind, err);
-               if (act == NULL)
+       for (i = 1; i <= TCA_ACT_MAX_PRIO && tb[i]; i++) {
+               act = tcf_action_init_1(tb[i], est, name, ovr, bind);
+               if (IS_ERR(act))
                        goto err;
-               act->order = i+1;
+               act->order = i;
 
                if (head == NULL)
                        head = act;
@@ -372,7 +577,7 @@ struct tc_action *tcf_action_init(struct rtattr *rta, struct rtattr *est,
 err:
        if (head != NULL)
                tcf_action_destroy(head, bind);
-       return NULL;
+       return act;
 }
 
 int tcf_action_copy_stats(struct sk_buff *skb, struct tc_action *a,
@@ -381,7 +586,7 @@ int tcf_action_copy_stats(struct sk_buff *skb, struct tc_action *a,
        int err = 0;
        struct gnet_dump d;
        struct tcf_act_hdr *h = a->priv;
-       
+
        if (h == NULL)
                goto errout;
 
@@ -391,12 +596,12 @@ int tcf_action_copy_stats(struct sk_buff *skb, struct tc_action *a,
        if (compat_mode) {
                if (a->type == TCA_OLD_COMPAT)
                        err = gnet_stats_start_copy_compat(skb, 0,
-                               TCA_STATS, TCA_XSTATS, h->stats_lock, &d);
+                               TCA_STATS, TCA_XSTATS, &h->tcf_lock, &d);
                else
                        return 0;
        } else
                err = gnet_stats_start_copy(skb, TCA_ACT_STATS,
-                       h->stats_lock, &d);
+                                           &h->tcf_lock, &d);
 
        if (err < 0)
                goto errout;
@@ -405,11 +610,9 @@ int tcf_action_copy_stats(struct sk_buff *skb, struct tc_action *a,
                if (a->ops->get_stats(skb, a) < 0)
                        goto errout;
 
-       if (gnet_stats_copy_basic(&d, &h->bstats) < 0 ||
-#ifdef CONFIG_NET_ESTIMATOR
-           gnet_stats_copy_rate_est(&d, &h->rate_est) < 0 ||
-#endif
-           gnet_stats_copy_queue(&d, &h->qstats) < 0)
+       if (gnet_stats_copy_basic(&d, &h->tcf_bstats) < 0 ||
+           gnet_stats_copy_rate_est(&d, &h->tcf_rate_est) < 0 ||
+           gnet_stats_copy_queue(&d, &h->tcf_qstats) < 0)
                goto errout;
 
        if (gnet_stats_finish_copy(&d) < 0)
@@ -423,12 +626,12 @@ errout:
 
 static int
 tca_get_fill(struct sk_buff *skb, struct tc_action *a, u32 pid, u32 seq,
-             u16 flags, int event, int bind, int ref)
+            u16 flags, int event, int bind, int ref)
 {
        struct tcamsg *t;
        struct nlmsghdr *nlh;
-       unsigned char *b = skb->tail;
-       struct rtattr *x;
+       unsigned char *b = skb_tail_pointer(skb);
+       struct nlattr *nest;
 
        nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*t), flags);
 
@@ -436,21 +639,22 @@ tca_get_fill(struct sk_buff *skb, struct tc_action *a, u32 pid, u32 seq,
        t->tca_family = AF_UNSPEC;
        t->tca__pad1 = 0;
        t->tca__pad2 = 0;
-       
-       x = (struct rtattr*) skb->tail;
-       RTA_PUT(skb, TCA_ACT_TAB, 0, NULL);
+
+       nest = nla_nest_start(skb, TCA_ACT_TAB);
+       if (nest == NULL)
+               goto nla_put_failure;
 
        if (tcf_action_dump(skb, a, bind, ref) < 0)
-               goto rtattr_failure;
+               goto nla_put_failure;
 
-       x->rta_len = skb->tail - (u8*)x;
-       
-       nlh->nlmsg_len = skb->tail - b;
+       nla_nest_end(skb, nest);
+
+       nlh->nlmsg_len = skb_tail_pointer(skb) - b;
        return skb->len;
 
-rtattr_failure:
+nla_put_failure:
 nlmsg_failure:
-       skb_trim(skb, b - skb->data);
+       nlmsg_trim(skb, b);
        return -1;
 }
 
@@ -458,7 +662,6 @@ static int
 act_get_notify(u32 pid, struct nlmsghdr *n, struct tc_action *a, int event)
 {
        struct sk_buff *skb;
-       int err = 0;
 
        skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
        if (!skb)
@@ -467,52 +670,52 @@ act_get_notify(u32 pid, struct nlmsghdr *n, struct tc_action *a, int event)
                kfree_skb(skb);
                return -EINVAL;
        }
-       err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT);
-       if (err > 0)
-               err = 0;
-       return err;
+
+       return rtnl_unicast(skb, &init_net, pid);
 }
 
 static struct tc_action *
-tcf_action_get_1(struct rtattr *rta, struct nlmsghdr *n, u32 pid, int *err)
+tcf_action_get_1(struct nlattr *nla, struct nlmsghdr *n, u32 pid)
 {
-       struct rtattr *tb[TCA_ACT_MAX+1];
+       struct nlattr *tb[TCA_ACT_MAX+1];
        struct tc_action *a;
        int index;
+       int err;
 
-       *err = -EINVAL;
-       if (rtattr_parse_nested(tb, TCA_ACT_MAX, rta) < 0)
-               return NULL;
+       err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL);
+       if (err < 0)
+               goto err_out;
 
-       if (tb[TCA_ACT_INDEX - 1] == NULL ||
-           RTA_PAYLOAD(tb[TCA_ACT_INDEX - 1]) < sizeof(index))
-               return NULL;
-       index = *(int *)RTA_DATA(tb[TCA_ACT_INDEX - 1]);
+       err = -EINVAL;
+       if (tb[TCA_ACT_INDEX] == NULL ||
+           nla_len(tb[TCA_ACT_INDEX]) < sizeof(index))
+               goto err_out;
+       index = nla_get_u32(tb[TCA_ACT_INDEX]);
 
-       *err = -ENOMEM;
-       a = kmalloc(sizeof(struct tc_action), GFP_KERNEL);
+       err = -ENOMEM;
+       a = kzalloc(sizeof(struct tc_action), GFP_KERNEL);
        if (a == NULL)
-               return NULL;
-       memset(a, 0, sizeof(struct tc_action));
+               goto err_out;
 
-       *err = -EINVAL;
-       a->ops = tc_lookup_action(tb[TCA_ACT_KIND - 1]);
+       err = -EINVAL;
+       a->ops = tc_lookup_action(tb[TCA_ACT_KIND]);
        if (a->ops == NULL)
                goto err_free;
        if (a->ops->lookup == NULL)
                goto err_mod;
-       *err = -ENOENT;
+       err = -ENOENT;
        if (a->ops->lookup(a, index) == 0)
                goto err_mod;
 
        module_put(a->ops->owner);
-       *err = 0;
        return a;
+
 err_mod:
        module_put(a->ops->owner);
 err_free:
        kfree(a);
-       return NULL;
+err_out:
+       return ERR_PTR(err);
 }
 
 static void cleanup_a(struct tc_action *act)
@@ -529,26 +732,25 @@ static struct tc_action *create_a(int i)
 {
        struct tc_action *act;
 
-       act = kmalloc(sizeof(*act), GFP_KERNEL);
+       act = kzalloc(sizeof(*act), GFP_KERNEL);
        if (act == NULL) {
                printk("create_a: failed to alloc!\n");
                return NULL;
        }
-       memset(act, 0, sizeof(*act));
        act->order = i;
        return act;
 }
 
-static int tca_action_flush(struct rtattr *rta, struct nlmsghdr *n, u32 pid)
+static int tca_action_flush(struct nlattr *nla, struct nlmsghdr *n, u32 pid)
 {
        struct sk_buff *skb;
        unsigned char *b;
        struct nlmsghdr *nlh;
        struct tcamsg *t;
        struct netlink_callback dcb;
-       struct rtattr *x;
-       struct rtattr *tb[TCA_ACT_MAX+1];
-       struct rtattr *kind;
+       struct nlattr *nest;
+       struct nlattr *tb[TCA_ACT_MAX+1];
+       struct nlattr *kind;
        struct tc_action *a = create_a(0);
        int err = -EINVAL;
 
@@ -564,12 +766,14 @@ static int tca_action_flush(struct rtattr *rta, struct nlmsghdr *n, u32 pid)
                return -ENOBUFS;
        }
 
-       b = (unsigned char *)skb->tail;
+       b = skb_tail_pointer(skb);
 
-       if (rtattr_parse_nested(tb, TCA_ACT_MAX, rta) < 0)
+       err = nla_parse_nested(tb, TCA_ACT_MAX, nla, NULL);
+       if (err < 0)
                goto err_out;
 
-       kind = tb[TCA_ACT_KIND-1];
+       err = -EINVAL;
+       kind = tb[TCA_ACT_KIND];
        a->ops = tc_lookup_action(kind);
        if (a->ops == NULL)
                goto err_out;
@@ -580,28 +784,29 @@ static int tca_action_flush(struct rtattr *rta, struct nlmsghdr *n, u32 pid)
        t->tca__pad1 = 0;
        t->tca__pad2 = 0;
 
-       x = (struct rtattr *) skb->tail;
-       RTA_PUT(skb, TCA_ACT_TAB, 0, NULL);
+       nest = nla_nest_start(skb, TCA_ACT_TAB);
+       if (nest == NULL)
+               goto nla_put_failure;
 
        err = a->ops->walk(skb, &dcb, RTM_DELACTION, a);
        if (err < 0)
-               goto rtattr_failure;
+               goto nla_put_failure;
 
-       x->rta_len = skb->tail - (u8 *) x;
+       nla_nest_end(skb, nest);
 
-       nlh->nlmsg_len = skb->tail - b;
+       nlh->nlmsg_len = skb_tail_pointer(skb) - b;
        nlh->nlmsg_flags |= NLM_F_ROOT;
        module_put(a->ops->owner);
        kfree(a);
-       err = rtnetlink_send(skb, pid, RTNLGRP_TC, n->nlmsg_flags&NLM_F_ECHO);
+       err = rtnetlink_send(skb, &init_net, pid, RTNLGRP_TC, n->nlmsg_flags&NLM_F_ECHO);
        if (err > 0)
                return 0;
 
        return err;
 
-rtattr_failure:
-       module_put(a->ops->owner);
+nla_put_failure:
 nlmsg_failure:
+       module_put(a->ops->owner);
 err_out:
        kfree_skb(skb);
        kfree(a);
@@ -609,25 +814,28 @@ err_out:
 }
 
 static int
-tca_action_gd(struct rtattr *rta, struct nlmsghdr *n, u32 pid, int event)
+tca_action_gd(struct nlattr *nla, struct nlmsghdr *n, u32 pid, int event)
 {
-       int i, ret = 0;
-       struct rtattr *tb[TCA_ACT_MAX_PRIO+1];
+       int i, ret;
+       struct nlattr *tb[TCA_ACT_MAX_PRIO+1];
        struct tc_action *head = NULL, *act, *act_prev = NULL;
 
-       if (rtattr_parse_nested(tb, TCA_ACT_MAX_PRIO, rta) < 0)
-               return -EINVAL;
+       ret = nla_parse_nested(tb, TCA_ACT_MAX_PRIO, nla, NULL);
+       if (ret < 0)
+               return ret;
 
        if (event == RTM_DELACTION && n->nlmsg_flags&NLM_F_ROOT) {
                if (tb[0] != NULL && tb[1] == NULL)
                        return tca_action_flush(tb[0], n, pid);
        }
 
-       for (i=0; i < TCA_ACT_MAX_PRIO && tb[i]; i++) {
-               act = tcf_action_get_1(tb[i], n, pid, &ret);
-               if (act == NULL)
+       for (i = 1; i <= TCA_ACT_MAX_PRIO && tb[i]; i++) {
+               act = tcf_action_get_1(tb[i], n, pid);
+               if (IS_ERR(act)) {
+                       ret = PTR_ERR(act);
                        goto err;
-               act->order = i+1;
+               }
+               act->order = i;
 
                if (head == NULL)
                        head = act;
@@ -648,7 +856,7 @@ tca_action_gd(struct rtattr *rta, struct nlmsghdr *n, u32 pid, int event)
                }
 
                if (tca_get_fill(skb, head, pid, n->nlmsg_seq, 0, event,
-                                0, 1) <= 0) {
+                                0, 1) <= 0) {
                        kfree_skb(skb);
                        ret = -EINVAL;
                        goto err;
@@ -656,8 +864,8 @@ tca_action_gd(struct rtattr *rta, struct nlmsghdr *n, u32 pid, int event)
 
                /* now do the delete */
                tcf_action_destroy(head, 0);
-               ret = rtnetlink_send(skb, pid, RTNLGRP_TC,
-                                    n->nlmsg_flags&NLM_F_ECHO);
+               ret = rtnetlink_send(skb, &init_net, pid, RTNLGRP_TC,
+                                    n->nlmsg_flags&NLM_F_ECHO);
                if (ret > 0)
                        return 0;
                return ret;
@@ -668,12 +876,12 @@ err:
 }
 
 static int tcf_add_notify(struct tc_action *a, u32 pid, u32 seq, int event,
-                          u16 flags)
+                         u16 flags)
 {
        struct tcamsg *t;
        struct nlmsghdr *nlh;
        struct sk_buff *skb;
-       struct rtattr *x;
+       struct nlattr *nest;
        unsigned char *b;
        int err = 0;
 
@@ -681,7 +889,7 @@ static int tcf_add_notify(struct tc_action *a, u32 pid, u32 seq, int event,
        if (!skb)
                return -ENOBUFS;
 
-       b = (unsigned char *)skb->tail;
+       b = skb_tail_pointer(skb);
 
        nlh = NLMSG_NEW(skb, pid, seq, event, sizeof(*t), flags);
        t = NLMSG_DATA(nlh);
@@ -689,40 +897,45 @@ static int tcf_add_notify(struct tc_action *a, u32 pid, u32 seq, int event,
        t->tca__pad1 = 0;
        t->tca__pad2 = 0;
 
-       x = (struct rtattr*) skb->tail;
-       RTA_PUT(skb, TCA_ACT_TAB, 0, NULL);
+       nest = nla_nest_start(skb, TCA_ACT_TAB);
+       if (nest == NULL)
+               goto nla_put_failure;
 
        if (tcf_action_dump(skb, a, 0, 0) < 0)
-               goto rtattr_failure;
+               goto nla_put_failure;
+
+       nla_nest_end(skb, nest);
 
-       x->rta_len = skb->tail - (u8*)x;
-       
-       nlh->nlmsg_len = skb->tail - b;
+       nlh->nlmsg_len = skb_tail_pointer(skb) - b;
        NETLINK_CB(skb).dst_group = RTNLGRP_TC;
-       
-       err = rtnetlink_send(skb, pid, RTNLGRP_TC, flags&NLM_F_ECHO);
+
+       err = rtnetlink_send(skb, &init_net, pid, RTNLGRP_TC, flags&NLM_F_ECHO);
        if (err > 0)
                err = 0;
        return err;
 
-rtattr_failure:
+nla_put_failure:
 nlmsg_failure:
-       skb_trim(skb, b - skb->data);
+       kfree_skb(skb);
        return -1;
 }
 
-       
+
 static int
-tcf_action_add(struct rtattr *rta, struct nlmsghdr *n, u32 pid, int ovr)
+tcf_action_add(struct nlattr *nla, struct nlmsghdr *n, u32 pid, int ovr)
 {
        int ret = 0;
        struct tc_action *act;
        struct tc_action *a;
        u32 seq = n->nlmsg_seq;
 
-       act = tcf_action_init(rta, NULL, NULL, ovr, 0, &ret);
+       act = tcf_action_init(nla, NULL, NULL, ovr, 0);
        if (act == NULL)
                goto done;
+       if (IS_ERR(act)) {
+               ret = PTR_ERR(act);
+               goto done;
+       }
 
        /* dump then free all the actions after update; inserted policy
         * stays intact
@@ -738,11 +951,19 @@ done:
 
 static int tc_ctl_action(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
 {
-       struct rtattr **tca = arg;
+       struct net *net = sock_net(skb->sk);
+       struct nlattr *tca[TCA_ACT_MAX + 1];
        u32 pid = skb ? NETLINK_CB(skb).pid : 0;
        int ret = 0, ovr = 0;
 
-       if (tca[TCA_ACT_TAB-1] == NULL) {
+       if (net != &init_net)
+               return -EINVAL;
+
+       ret = nlmsg_parse(n, sizeof(struct tcamsg), tca, TCA_ACT_MAX, NULL);
+       if (ret < 0)
+               return ret;
+
+       if (tca[TCA_ACT_TAB] == NULL) {
                printk("tc_ctl_action: received NO action attribs\n");
                return -EINVAL;
        }
@@ -760,15 +981,15 @@ static int tc_ctl_action(struct sk_buff *skb, struct nlmsghdr *n, void *arg)
                if (n->nlmsg_flags&NLM_F_REPLACE)
                        ovr = 1;
 replay:
-               ret = tcf_action_add(tca[TCA_ACT_TAB-1], n, pid, ovr);
+               ret = tcf_action_add(tca[TCA_ACT_TAB], n, pid, ovr);
                if (ret == -EAGAIN)
                        goto replay;
                break;
        case RTM_DELACTION:
-               ret = tca_action_gd(tca[TCA_ACT_TAB-1], n, pid, RTM_DELACTION);
+               ret = tca_action_gd(tca[TCA_ACT_TAB], n, pid, RTM_DELACTION);
                break;
        case RTM_GETACTION:
-               ret = tca_action_gd(tca[TCA_ACT_TAB-1], n, pid, RTM_GETACTION);
+               ret = tca_action_gd(tca[TCA_ACT_TAB], n, pid, RTM_GETACTION);
                break;
        default:
                BUG();
@@ -777,57 +998,57 @@ replay:
        return ret;
 }
 
-static char *
+static struct nlattr *
 find_dump_kind(struct nlmsghdr *n)
 {
-       struct rtattr *tb1, *tb2[TCA_ACT_MAX+1];
-       struct rtattr *tb[TCA_ACT_MAX_PRIO + 1];
-       struct rtattr *rta[TCAA_MAX + 1];
-       struct rtattr *kind;
-       int min_len = NLMSG_LENGTH(sizeof(struct tcamsg));
-       int attrlen = n->nlmsg_len - NLMSG_ALIGN(min_len);
-       struct rtattr *attr = (void *) n + NLMSG_ALIGN(min_len);
+       struct nlattr *tb1, *tb2[TCA_ACT_MAX+1];
+       struct nlattr *tb[TCA_ACT_MAX_PRIO + 1];
+       struct nlattr *nla[TCAA_MAX + 1];
+       struct nlattr *kind;
 
-       if (rtattr_parse(rta, TCAA_MAX, attr, attrlen) < 0)
+       if (nlmsg_parse(n, sizeof(struct tcamsg), nla, TCAA_MAX, NULL) < 0)
                return NULL;
-       tb1 = rta[TCA_ACT_TAB - 1];
+       tb1 = nla[TCA_ACT_TAB];
        if (tb1 == NULL)
                return NULL;
 
-       if (rtattr_parse(tb, TCA_ACT_MAX_PRIO, RTA_DATA(tb1),
-                        NLMSG_ALIGN(RTA_PAYLOAD(tb1))) < 0)
-               return NULL;
-       if (tb[0] == NULL)
+       if (nla_parse(tb, TCA_ACT_MAX_PRIO, nla_data(tb1),
+                     NLMSG_ALIGN(nla_len(tb1)), NULL) < 0)
                return NULL;
 
-       if (rtattr_parse(tb2, TCA_ACT_MAX, RTA_DATA(tb[0]),
-                        RTA_PAYLOAD(tb[0])) < 0)
+       if (tb[1] == NULL)
+               return NULL;
+       if (nla_parse(tb2, TCA_ACT_MAX, nla_data(tb[1]),
+                     nla_len(tb[1]), NULL) < 0)
                return NULL;
-       kind = tb2[TCA_ACT_KIND-1];
+       kind = tb2[TCA_ACT_KIND];
 
-       return (char *) RTA_DATA(kind);
+       return kind;
 }
 
 static int
 tc_dump_action(struct sk_buff *skb, struct netlink_callback *cb)
 {
+       struct net *net = sock_net(skb->sk);
        struct nlmsghdr *nlh;
-       unsigned char *b = skb->tail;
-       struct rtattr *x;
+       unsigned char *b = skb_tail_pointer(skb);
+       struct nlattr *nest;
        struct tc_action_ops *a_o;
        struct tc_action a;
        int ret = 0;
        struct tcamsg *t = (struct tcamsg *) NLMSG_DATA(cb->nlh);
-       char *kind = find_dump_kind(cb->nlh);
+       struct nlattr *kind = find_dump_kind(cb->nlh);
+
+       if (net != &init_net)
+               return 0;
 
        if (kind == NULL) {
                printk("tc_dump_action: action bad kind\n");
                return 0;
        }
 
-       a_o = tc_lookup_action_n(kind);
+       a_o = tc_lookup_action(kind);
        if (a_o == NULL) {
-               printk("failed to find %s\n", kind);
                return 0;
        }
 
@@ -835,62 +1056,51 @@ tc_dump_action(struct sk_buff *skb, struct netlink_callback *cb)
        a.ops = a_o;
 
        if (a_o->walk == NULL) {
-               printk("tc_dump_action: %s !capable of dumping table\n", kind);
-               goto rtattr_failure;
+               printk("tc_dump_action: %s !capable of dumping table\n", a_o->kind);
+               goto nla_put_failure;
        }
 
        nlh = NLMSG_PUT(skb, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq,
-                       cb->nlh->nlmsg_type, sizeof(*t));
+                       cb->nlh->nlmsg_type, sizeof(*t));
        t = NLMSG_DATA(nlh);
        t->tca_family = AF_UNSPEC;
        t->tca__pad1 = 0;
        t->tca__pad2 = 0;
 
-       x = (struct rtattr *) skb->tail;
-       RTA_PUT(skb, TCA_ACT_TAB, 0, NULL);
+       nest = nla_nest_start(skb, TCA_ACT_TAB);
+       if (nest == NULL)
+               goto nla_put_failure;
 
        ret = a_o->walk(skb, cb, RTM_GETACTION, &a);
        if (ret < 0)
-               goto rtattr_failure;
+               goto nla_put_failure;
 
        if (ret > 0) {
-               x->rta_len = skb->tail - (u8 *) x;
+               nla_nest_end(skb, nest);
                ret = skb->len;
        } else
-               skb_trim(skb, (u8*)x - skb->data);
+               nla_nest_cancel(skb, nest);
 
-       nlh->nlmsg_len = skb->tail - b;
+       nlh->nlmsg_len = skb_tail_pointer(skb) - b;
        if (NETLINK_CB(cb->skb).pid && ret)
                nlh->nlmsg_flags |= NLM_F_MULTI;
        module_put(a_o->owner);
        return skb->len;
 
-rtattr_failure:
+nla_put_failure:
 nlmsg_failure:
        module_put(a_o->owner);
-       skb_trim(skb, b - skb->data);
+       nlmsg_trim(skb, b);
        return skb->len;
 }
 
 static int __init tc_action_init(void)
 {
-       struct rtnetlink_link *link_p = rtnetlink_links[PF_UNSPEC];
+       rtnl_register(PF_UNSPEC, RTM_NEWACTION, tc_ctl_action, NULL);
+       rtnl_register(PF_UNSPEC, RTM_DELACTION, tc_ctl_action, NULL);
+       rtnl_register(PF_UNSPEC, RTM_GETACTION, tc_ctl_action, tc_dump_action);
 
-       if (link_p) {
-               link_p[RTM_NEWACTION-RTM_BASE].doit = tc_ctl_action;
-               link_p[RTM_DELACTION-RTM_BASE].doit = tc_ctl_action;
-               link_p[RTM_GETACTION-RTM_BASE].doit = tc_ctl_action;
-               link_p[RTM_GETACTION-RTM_BASE].dumpit = tc_dump_action;
-       }
-
-       printk("TC classifier action (bugs to netdev@vger.kernel.org cc "
-              "hadi@cyberus.ca)\n");
        return 0;
 }
 
 subsys_initcall(tc_action_init);
-
-EXPORT_SYMBOL(tcf_register_action);
-EXPORT_SYMBOL(tcf_unregister_action);
-EXPORT_SYMBOL(tcf_action_exec);
-EXPORT_SYMBOL(tcf_action_dump_1);