1 files changed, 81 insertions, 84 deletions

diff --git a/net/sched/act_ipt.c b/net/sched/act_ipt.c
index 082c520b0de..8a64a0734ae 100644
--- a/net/sched/act_ipt.c
+++ b/net/sched/act_ipt.c
@@ -1,5 +1,5 @@
 /*
- * net/sched/ipt.c	iptables target interface
+ * net/sched/ipt.c     iptables target interface
  *
  *TODO: Add other tables. For now we only support the ipv4 table targets
  *
@@ -8,7 +8,7 @@
  *		as published by the Free Software Foundation; either version
  *		2 of the License, or (at your option) any later version.
  *
- * Copyright:	Jamal Hadi Salim (2002-4)
+ * Copyright:	Jamal Hadi Salim (2002-13)
  */
 
 #include <linux/types.h>
@@ -19,6 +19,7 @@
 #include <linux/rtnetlink.h>
 #include <linux/module.h>
 #include <linux/init.h>
+#include <linux/slab.h>
 #include <net/netlink.h>
 #include <net/pkt_sched.h>
 #include <linux/tc_act/tc_ipt.h>
@@ -28,17 +29,8 @@
 
 
 #define IPT_TAB_MASK     15
-static struct tcf_common *tcf_ipt_ht[IPT_TAB_MASK + 1];
-static u32 ipt_idx_gen;
-static DEFINE_RWLOCK(ipt_lock);
-
-static struct tcf_hashinfo ipt_hash_info = {
-	.htab	=	tcf_ipt_ht,
-	.hmask	=	IPT_TAB_MASK,
-	.lock	=	&ipt_lock,
-};
 
-static int ipt_init_target(struct ipt_entry_target *t, char *table, unsigned int hook)
+static int ipt_init_target(struct xt_entry_target *t, char *table, unsigned int hook)
 {
 	struct xt_tgchk_param par;
 	struct xt_target *target;
@@ -46,8 +38,8 @@ static int ipt_init_target(struct ipt_entry_target *t, char *table, unsigned int
 
 	target = xt_request_find_target(AF_INET, t->u.user.name,
 					t->u.user.revision);
-	if (!target)
-		return -ENOENT;
+	if (IS_ERR(target))
+		return PTR_ERR(target);
 
 	t->u.kernel.target = target;
 	par.table     = table;
@@ -65,7 +57,7 @@ static int ipt_init_target(struct ipt_entry_target *t, char *table, unsigned int
 	return 0;
 }
 
-static void ipt_destroy_target(struct ipt_entry_target *t)
+static void ipt_destroy_target(struct xt_entry_target *t)
 {
 	struct xt_tgdtor_param par = {
 		.target   = t->u.kernel.target,
@@ -76,38 +68,27 @@ static void ipt_destroy_target(struct ipt_entry_target *t)
 	module_put(par.target->me);
 }
 
-static int tcf_ipt_release(struct tcf_ipt *ipt, int bind)
+static void tcf_ipt_release(struct tc_action *a, int bind)
 {
-	int ret = 0;
-	if (ipt) {
-		if (bind)
-			ipt->tcf_bindcnt--;
-		ipt->tcf_refcnt--;
-		if (ipt->tcf_bindcnt <= 0 && ipt->tcf_refcnt <= 0) {
-			ipt_destroy_target(ipt->tcfi_t);
-			kfree(ipt->tcfi_tname);
-			kfree(ipt->tcfi_t);
-			tcf_hash_destroy(&ipt->common, &ipt_hash_info);
-			ret = ACT_P_DELETED;
-		}
-	}
-	return ret;
+	struct tcf_ipt *ipt = to_ipt(a);
+	ipt_destroy_target(ipt->tcfi_t);
+	kfree(ipt->tcfi_tname);
+	kfree(ipt->tcfi_t);
 }
 
 static const struct nla_policy ipt_policy[TCA_IPT_MAX + 1] = {
 	[TCA_IPT_TABLE]	= { .type = NLA_STRING, .len = IFNAMSIZ },
 	[TCA_IPT_HOOK]	= { .type = NLA_U32 },
 	[TCA_IPT_INDEX]	= { .type = NLA_U32 },
-	[TCA_IPT_TARG]	= { .len = sizeof(struct ipt_entry_target) },
+	[TCA_IPT_TARG]	= { .len = sizeof(struct xt_entry_target) },
 };
 
-static int tcf_ipt_init(struct nlattr *nla, struct nlattr *est,
+static int tcf_ipt_init(struct net *net, struct nlattr *nla, struct nlattr *est,
 			struct tc_action *a, int ovr, int bind)
 {
 	struct nlattr *tb[TCA_IPT_MAX + 1];
 	struct tcf_ipt *ipt;
-	struct tcf_common *pc;
-	struct ipt_entry_target *td, *t;
+	struct xt_entry_target *td, *t;
 	char *tname;
 	int ret = 0, err;
 	u32 hook = 0;
@@ -125,27 +106,27 @@ static int tcf_ipt_init(struct nlattr *nla, struct nlattr *est,
 	if (tb[TCA_IPT_TARG] == NULL)
 		return -EINVAL;
 
-	td = (struct ipt_entry_target *)nla_data(tb[TCA_IPT_TARG]);
+	td = (struct xt_entry_target *)nla_data(tb[TCA_IPT_TARG]);
 	if (nla_len(tb[TCA_IPT_TARG]) < td->u.target_size)
 		return -EINVAL;
 
 	if (tb[TCA_IPT_INDEX] != NULL)
 		index = nla_get_u32(tb[TCA_IPT_INDEX]);
 
-	pc = tcf_hash_check(index, a, bind, &ipt_hash_info);
-	if (!pc) {
-		pc = tcf_hash_create(index, est, a, sizeof(*ipt), bind,
-				     &ipt_idx_gen, &ipt_hash_info);
-		if (IS_ERR(pc))
-		    return PTR_ERR(pc);
+	if (!tcf_hash_check(index, a, bind) ) {
+		ret = tcf_hash_create(index, est, a, sizeof(*ipt), bind);
+		if (ret)
+			return ret;
 		ret = ACT_P_CREATED;
 	} else {
-		if (!ovr) {
-			tcf_ipt_release(to_ipt(pc), bind);
+		if (bind)/* dont override defaults */
+			return 0;
+		tcf_hash_release(a, bind);
+
+		if (!ovr)
 			return -EEXIST;
-		}
 	}
-	ipt = to_ipt(pc);
+	ipt = to_ipt(a);
 
 	hook = nla_get_u32(tb[TCA_IPT_HOOK]);
 
@@ -161,7 +142,8 @@ static int tcf_ipt_init(struct nlattr *nla, struct nlattr *est,
 	if (unlikely(!t))
 		goto err2;
 
-	if ((err = ipt_init_target(t, tname, hook)) < 0)
+	err = ipt_init_target(t, tname, hook);
+	if (err < 0)
 		goto err3;
 
 	spin_lock_bh(&ipt->tcf_lock);
@@ -175,7 +157,7 @@ static int tcf_ipt_init(struct nlattr *nla, struct nlattr *est,
 	ipt->tcfi_hook  = hook;
 	spin_unlock_bh(&ipt->tcf_lock);
 	if (ret == ACT_P_CREATED)
-		tcf_hash_insert(pc, &ipt_hash_info);
+		tcf_hash_insert(a);
 	return ret;
 
 err3:
@@ -183,37 +165,30 @@ err3:
 err2:
 	kfree(tname);
 err1:
-	kfree(pc);
+	if (ret == ACT_P_CREATED)
+		tcf_hash_cleanup(a, est);
 	return err;
 }
 
-static int tcf_ipt_cleanup(struct tc_action *a, int bind)
-{
-	struct tcf_ipt *ipt = a->priv;
-	return tcf_ipt_release(ipt, bind);
-}
-
-static int tcf_ipt(struct sk_buff *skb, struct tc_action *a,
+static int tcf_ipt(struct sk_buff *skb, const struct tc_action *a,
 		   struct tcf_result *res)
 {
 	int ret = 0, result = 0;
 	struct tcf_ipt *ipt = a->priv;
-	struct xt_target_param par;
+	struct xt_action_param par;
 
-	if (skb_cloned(skb)) {
-		if (pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
-			return TC_ACT_UNSPEC;
-	}
+	if (skb_unclone(skb, GFP_ATOMIC))
+		return TC_ACT_UNSPEC;
 
 	spin_lock(&ipt->tcf_lock);
 
 	ipt->tcf_tm.lastuse = jiffies;
-	ipt->tcf_bstats.bytes += qdisc_pkt_len(skb);
-	ipt->tcf_bstats.packets++;
+	bstats_update(&ipt->tcf_bstats, skb);
 
 	/* yes, we have to worry about both in and out dev
-	 worry later - danger - this API seems to have changed
-	 from earlier kernels */
+	 * worry later - danger - this API seems to have changed
+	 * from earlier kernels
+	 */
 	par.in       = skb->dev;
 	par.out      = NULL;
 	par.hooknum  = ipt->tcfi_hook;
@@ -229,12 +204,12 @@ static int tcf_ipt(struct sk_buff *skb, struct tc_action *a,
 		result = TC_ACT_SHOT;
 		ipt->tcf_qstats.drops++;
 		break;
-	case IPT_CONTINUE:
+	case XT_CONTINUE:
 		result = TC_ACT_PIPE;
 		break;
 	default:
-		if (net_ratelimit())
-			printk("Bogus netfilter code %d assume ACCEPT\n", ret);
+		net_notice_ratelimited("tc filter: Bogus netfilter code %d assume ACCEPT\n",
+				       ret);
 		result = TC_POLICE_OK;
 		break;
 	}
@@ -247,14 +222,14 @@ static int tcf_ipt_dump(struct sk_buff *skb, struct tc_action *a, int bind, int
 {
 	unsigned char *b = skb_tail_pointer(skb);
 	struct tcf_ipt *ipt = a->priv;
-	struct ipt_entry_target *t;
+	struct xt_entry_target *t;
 	struct tcf_t tm;
 	struct tc_cnt c;
 
 	/* for simple targets kernel size == user size
-	** user name = target name
-	** for foolproof you need to not assume this
-	*/
+	 * user name = target name
+	 * for foolproof you need to not assume this
+	 */
 
 	t = kmemdup(ipt->tcfi_t, ipt->tcfi_t->u.user.target_size, GFP_ATOMIC);
 	if (unlikely(!t))
@@ -264,15 +239,17 @@ static int tcf_ipt_dump(struct sk_buff *skb, struct tc_action *a, int bind, int
 	c.refcnt = ipt->tcf_refcnt - ref;
 	strcpy(t->u.user.name, ipt->tcfi_t->u.kernel.target->name);
 
-	NLA_PUT(skb, TCA_IPT_TARG, ipt->tcfi_t->u.user.target_size, t);
-	NLA_PUT_U32(skb, TCA_IPT_INDEX, ipt->tcf_index);
-	NLA_PUT_U32(skb, TCA_IPT_HOOK, ipt->tcfi_hook);
-	NLA_PUT(skb, TCA_IPT_CNT, sizeof(struct tc_cnt), &c);
-	NLA_PUT_STRING(skb, TCA_IPT_TABLE, ipt->tcfi_tname);
+	if (nla_put(skb, TCA_IPT_TARG, ipt->tcfi_t->u.user.target_size, t) ||
+	    nla_put_u32(skb, TCA_IPT_INDEX, ipt->tcf_index) ||
+	    nla_put_u32(skb, TCA_IPT_HOOK, ipt->tcfi_hook) ||
+	    nla_put(skb, TCA_IPT_CNT, sizeof(struct tc_cnt), &c) ||
+	    nla_put_string(skb, TCA_IPT_TABLE, ipt->tcfi_tname))
+		goto nla_put_failure;
 	tm.install = jiffies_to_clock_t(jiffies - ipt->tcf_tm.install);
 	tm.lastuse = jiffies_to_clock_t(jiffies - ipt->tcf_tm.lastuse);
 	tm.expires = jiffies_to_clock_t(ipt->tcf_tm.expires);
-	NLA_PUT(skb, TCA_IPT_TM, sizeof (tm), &tm);
+	if (nla_put(skb, TCA_IPT_TM, sizeof (tm), &tm))
+		goto nla_put_failure;
 	kfree(t);
 	return skb->len;
 
@@ -284,29 +261,49 @@ nla_put_failure:
 
 static struct tc_action_ops act_ipt_ops = {
 	.kind		=	"ipt",
-	.hinfo		=	&ipt_hash_info,
 	.type		=	TCA_ACT_IPT,
-	.capab		=	TCA_CAP_NONE,
 	.owner		=	THIS_MODULE,
 	.act		=	tcf_ipt,
 	.dump		=	tcf_ipt_dump,
-	.cleanup	=	tcf_ipt_cleanup,
-	.lookup		=	tcf_hash_search,
+	.cleanup	=	tcf_ipt_release,
+	.init		=	tcf_ipt_init,
+};
+
+static struct tc_action_ops act_xt_ops = {
+	.kind		=	"xt",
+	.type		=	TCA_ACT_XT,
+	.owner		=	THIS_MODULE,
+	.act		=	tcf_ipt,
+	.dump		=	tcf_ipt_dump,
+	.cleanup	=	tcf_ipt_release,
 	.init		=	tcf_ipt_init,
-	.walk		=	tcf_generic_walker
 };
 
-MODULE_AUTHOR("Jamal Hadi Salim(2002-4)");
+MODULE_AUTHOR("Jamal Hadi Salim(2002-13)");
 MODULE_DESCRIPTION("Iptables target actions");
 MODULE_LICENSE("GPL");
+MODULE_ALIAS("act_xt");
 
 static int __init ipt_init_module(void)
 {
-	return tcf_register_action(&act_ipt_ops);
+	int ret1, ret2;
+
+	ret1 = tcf_register_action(&act_xt_ops, IPT_TAB_MASK);
+	if (ret1 < 0)
+		printk("Failed to load xt action\n");
+	ret2 = tcf_register_action(&act_ipt_ops, IPT_TAB_MASK);
+	if (ret2 < 0)
+		printk("Failed to load ipt action\n");
+
+	if (ret1 < 0 && ret2 < 0) {
+		return ret1;
+	} else
+		return 0;
 }
 
 static void __exit ipt_cleanup_module(void)
 {
+	tcf_unregister_action(&act_xt_ops);
 	tcf_unregister_action(&act_ipt_ops);
 }