[PKT_SCHED]: act_api.c: remove module loading from get/delete operations

If get/delete can't find the action we can assume there is nothing
to get/delete.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/sched/act_api.c

@@ -380,10 +380,6 @@ int tcf_action_copy_stats(struct sk_buff *skb, struct tc_action *a)
 	struct gnet_dump d;
 	struct tcf_act_hdr *h = a->priv;
 	
-#ifdef CONFIG_KMOD
-	/* place holder */
-#endif
-
 	if (h == NULL)
 		goto errout;
 
@@ -470,58 +466,27 @@ act_get_notify(u32 pid, struct nlmsghdr *n, struct tc_action *a, int event)
 static int tcf_action_get_1(struct rtattr *rta, struct tc_action *a,
                             struct nlmsghdr *n, u32 pid)
 {
-	struct tc_action_ops *a_o;
-	char act_name[IFNAMSIZ];
 	struct rtattr *tb[TCA_ACT_MAX+1];
-	struct rtattr *kind;
 	int index;
-	int err = -EINVAL;
+	int err = 0;
 
 	if (rtattr_parse(tb, TCA_ACT_MAX, RTA_DATA(rta), RTA_PAYLOAD(rta)) < 0)
-		goto err_out;
-	kind = tb[TCA_ACT_KIND-1];
-	if (kind != NULL) {
-		if (rtattr_strlcpy(act_name, kind, IFNAMSIZ) >= IFNAMSIZ)
-			goto err_out;
-	} else {
-		printk("tcf_action_get_1: action bad kind\n");
-		goto err_out;
-	}
-
-	if (tb[TCA_ACT_INDEX - 1])
-		index = *(int *)RTA_DATA(tb[TCA_ACT_INDEX - 1]);
-	else {
-		printk("tcf_action_get_1: index not received\n");
-		goto err_out;
-	}
-
-	a_o = tc_lookup_action(kind);
-#ifdef CONFIG_KMOD
-	if (a_o == NULL) {
-		request_module (act_name);
-		a_o = tc_lookup_action_n(act_name);
-	}
-#endif
-	if (a_o == NULL) {
-		printk("failed to find %s\n", act_name);
-		goto err_out;
-	}
-	if (a == NULL)
-		goto err_mod;
+		return -EINVAL;
 
-	a->ops = a_o;
+	if (tb[TCA_ACT_INDEX - 1] == NULL ||
+	    RTA_PAYLOAD(tb[TCA_ACT_INDEX - 1]) < sizeof(index))
+		return -EINVAL;
+	index = *(int *)RTA_DATA(tb[TCA_ACT_INDEX - 1]);
 
-	if (a_o->lookup == NULL || a_o->lookup(a, index) == 0) {
-		a->ops = NULL;
+	a->ops = tc_lookup_action(tb[TCA_ACT_KIND - 1]);
+	if (a->ops == NULL)
+		return -EINVAL;
+	if (a->ops->lookup == NULL)
 		err = -EINVAL;
-		goto err_mod;
-	}
+	else if (a->ops->lookup(a, index) == 0)
+		err = -ENOENT;
 
-	module_put(a_o->owner);
-	return 0;
-err_mod:
-	module_put(a_o->owner);
-err_out:
+	module_put(a->ops->owner);
 	return err;
 }
 
@@ -535,36 +500,6 @@ static void cleanup_a(struct tc_action *act)
 	}
 }
 
-static struct tc_action_ops *get_ao(struct rtattr *kind, struct tc_action *a)
-{
-	char act_name[IFNAMSIZ];
-	struct tc_action_ops *a_o;
-
-	if (kind != NULL) {
-		if (rtattr_strlcpy(act_name, kind, IFNAMSIZ) >= IFNAMSIZ)
-			return NULL;
-	} else {
-		printk("get_ao: action bad kind\n");
-		return NULL;
-	}
-
-	a_o = tc_lookup_action(kind);
-#ifdef CONFIG_KMOD
-	if (a_o == NULL) {
-		DPRINTK("get_ao: trying to load module %s\n", act_name);
-		request_module(act_name);
-		a_o = tc_lookup_action_n(act_name);
-	}
-#endif
-	if (a_o == NULL) {
-		printk("get_ao: failed to find %s\n", act_name);
-		return NULL;
-	}
-
-	a->ops = a_o;
-	return a_o;
-}
-
 static struct tc_action *create_a(int i)
 {
 	struct tc_action *act;
@@ -610,7 +545,8 @@ static int tca_action_flush(struct rtattr *rta, struct nlmsghdr *n, u32 pid)
 		goto err_out;
 
 	kind = tb[TCA_ACT_KIND-1];
-	if (get_ao(kind, a) == NULL)
+	a->ops = tc_lookup_action(kind);
+	if (a->ops == NULL)
 		goto err_out;
 
 	nlh = NLMSG_PUT(skb, pid, n->nlmsg_seq, RTM_DELACTION, sizeof(*t));