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2024-05-14 bedbef8ad3e75a304af6361af235302bcc61d06b 
 kernel/drivers/net/ipvlan/ipvlan_core.c
....@@ -1,10 +1,5 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /* Copyright (c) 2014 Mahesh Bandewar <maheshb@google.com>
2
- *
3
- * This program is free software; you can redistribute it and/or
4
- * modify it under the terms of the GNU General Public License as
5
- * published by the Free Software Foundation; either version 2 of
6
- * the License, or (at your option) any later version.
7
- *
83  */
94 
105 #include "ipvlan.h"
....@@ -138,7 +133,7 @@
138133 	return ret;
139134 }
140135 
141
-static void *ipvlan_get_L3_hdr(struct ipvl_port *port, struct sk_buff *skb, int *type)
136
+void *ipvlan_get_L3_hdr(struct ipvl_port *port, struct sk_buff *skb, int *type)
142137 {
143138 	void *lyr3h = NULL;
144139 
....@@ -356,9 +351,8 @@
356351 	return ret;
357352 }
358353 
359
-static struct ipvl_addr *ipvlan_addr_lookup(struct ipvl_port *port,
360
-					    void *lyr3h, int addr_type,
361
-					    bool use_dest)
354
+struct ipvl_addr *ipvlan_addr_lookup(struct ipvl_port *port, void *lyr3h,
355
+				     int addr_type, bool use_dest)
362356 {
363357 	struct ipvl_addr *addr = NULL;
364358 
....@@ -443,6 +437,9 @@
443437 		goto err;
444438 	}
445439 	skb_dst_set(skb, &rt->dst);
440
+
441
+	memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
442
+
446443 	err = ip_local_out(net, skb->sk, skb);
447444 	if (unlikely(net_xmit_eval(err)))
448445 		dev->stats.tx_errors++;
....@@ -481,6 +478,9 @@
481478 		goto err;
482479 	}
483480 	skb_dst_set(skb, dst);
481
+
482
+	memset(IP6CB(skb), 0, sizeof(*IP6CB(skb)));
483
+
484484 	err = ip6_local_out(net, skb->sk, skb);
485485 	if (unlikely(net_xmit_eval(err)))
486486 		dev->stats.tx_errors++;
....@@ -502,7 +502,6 @@
502502 
503503 static int ipvlan_process_outbound(struct sk_buff *skb)
504504 {
505
-	struct ethhdr *ethh = eth_hdr(skb);
506505 	int ret = NET_XMIT_DROP;
507506 
508507 	/* The ipvlan is a pseudo-L2 device, so the packets that we receive
....@@ -512,6 +511,8 @@
512511 	if (skb_mac_header_was_set(skb)) {
513512 		/* In this mode we dont care about
514513 		 * multicast and broadcast traffic */
514
+		struct ethhdr *ethh = eth_hdr(skb);
515
+
515516 		if (is_multicast_ether_addr(ethh->h_dest)) {
516517 			pr_debug_ratelimited(
517518 				"Dropped {multi|broad}cast of type=[%x]\n",
....@@ -585,7 +586,8 @@
585586 				consume_skb(skb);
586587 				return NET_XMIT_DROP;
587588 			}
588
-			return ipvlan_rcv_frame(addr, &skb, true);
589
+			ipvlan_rcv_frame(addr, &skb, true);
590
+			return NET_XMIT_SUCCESS;
589591 		}
590592 	}
591593 out:
....@@ -596,7 +598,7 @@
596598 static int ipvlan_xmit_mode_l2(struct sk_buff *skb, struct net_device *dev)
597599 {
598600 	const struct ipvl_dev *ipvlan = netdev_priv(dev);
599
-	struct ethhdr *eth = eth_hdr(skb);
601
+	struct ethhdr *eth = skb_eth_hdr(skb);
600602 	struct ipvl_addr *addr;
601603 	void *lyr3h;
602604 	int addr_type;
....@@ -611,7 +613,8 @@
611613 					consume_skb(skb);
612614 					return NET_XMIT_DROP;
613615 				}
614
-				return ipvlan_rcv_frame(addr, &skb, true);
616
+				ipvlan_rcv_frame(addr, &skb, true);
617
+				return NET_XMIT_SUCCESS;
615618 			}
616619 		}
617620 		skb = skb_share_check(skb, GFP_ATOMIC);
....@@ -623,9 +626,11 @@
623626 		 * the skb for the main-dev. At the RX side we just return
624627 		 * RX_PASS for it to be processed further on the stack.
625628 		 */
626
-		return dev_forward_skb(ipvlan->phy_dev, skb);
629
+		dev_forward_skb(ipvlan->phy_dev, skb);
630
+		return NET_XMIT_SUCCESS;
627631 
628632 	} else if (is_multicast_ether_addr(eth->h_dest)) {
633
+		skb_reset_mac_header(skb);
629634 		ipvlan_skb_crossing_ns(skb, NULL);
630635 		ipvlan_multicast_enqueue(ipvlan->port, skb, true);
631636 		return NET_XMIT_SUCCESS;
....@@ -650,7 +655,9 @@
650655 	case IPVLAN_MODE_L2:
651656 		return ipvlan_xmit_mode_l2(skb, dev);
652657 	case IPVLAN_MODE_L3:
658
+#ifdef CONFIG_IPVLAN_L3S
653659 	case IPVLAN_MODE_L3S:
660
+#endif
654661 		return ipvlan_xmit_mode_l3(skb, dev);
655662 	}
656663 
....@@ -746,8 +753,10 @@
746753 		return ipvlan_handle_mode_l2(pskb, port);
747754 	case IPVLAN_MODE_L3:
748755 		return ipvlan_handle_mode_l3(pskb, port);
756
+#ifdef CONFIG_IPVLAN_L3S
749757 	case IPVLAN_MODE_L3S:
750758 		return RX_HANDLER_PASS;
759
+#endif
751760 	}
752761 
753762 	/* Should not reach here */
....@@ -755,98 +764,4 @@
755764 			  port->mode);
756765 	kfree_skb(skb);
757766 	return RX_HANDLER_CONSUMED;
758
-}
759
-
760
-static struct ipvl_addr *ipvlan_skb_to_addr(struct sk_buff *skb,
761
-					    struct net_device *dev)
762
-{
763
-	struct ipvl_addr *addr = NULL;
764
-	struct ipvl_port *port;
765
-	void *lyr3h;
766
-	int addr_type;
767
-
768
-	if (!dev || !netif_is_ipvlan_port(dev))
769
-		goto out;
770
-
771
-	port = ipvlan_port_get_rcu(dev);
772
-	if (!port || port->mode != IPVLAN_MODE_L3S)
773
-		goto out;
774
-
775
-	lyr3h = ipvlan_get_L3_hdr(port, skb, &addr_type);
776
-	if (!lyr3h)
777
-		goto out;
778
-
779
-	addr = ipvlan_addr_lookup(port, lyr3h, addr_type, true);
780
-out:
781
-	return addr;
782
-}
783
-
784
-struct sk_buff *ipvlan_l3_rcv(struct net_device *dev, struct sk_buff *skb,
785
-			      u16 proto)
786
-{
787
-	struct ipvl_addr *addr;
788
-	struct net_device *sdev;
789
-
790
-	addr = ipvlan_skb_to_addr(skb, dev);
791
-	if (!addr)
792
-		goto out;
793
-
794
-	sdev = addr->master->dev;
795
-	switch (proto) {
796
-	case AF_INET:
797
-	{
798
-		int err;
799
-		struct iphdr *ip4h = ip_hdr(skb);
800
-
801
-		err = ip_route_input_noref(skb, ip4h->daddr, ip4h->saddr,
802
-					   ip4h->tos, sdev);
803
-		if (unlikely(err))
804
-			goto out;
805
-		break;
806
-	}
807
-#if IS_ENABLED(CONFIG_IPV6)
808
-	case AF_INET6:
809
-	{
810
-		struct dst_entry *dst;
811
-		struct ipv6hdr *ip6h = ipv6_hdr(skb);
812
-		int flags = RT6_LOOKUP_F_HAS_SADDR;
813
-		struct flowi6 fl6 = {
814
-			.flowi6_iif   = sdev->ifindex,
815
-			.daddr        = ip6h->daddr,
816
-			.saddr        = ip6h->saddr,
817
-			.flowlabel    = ip6_flowinfo(ip6h),
818
-			.flowi6_mark  = skb->mark,
819
-			.flowi6_proto = ip6h->nexthdr,
820
-		};
821
-
822
-		skb_dst_drop(skb);
823
-		dst = ip6_route_input_lookup(dev_net(sdev), sdev, &fl6,
824
-					     skb, flags);
825
-		skb_dst_set(skb, dst);
826
-		break;
827
-	}
828
-#endif
829
-	default:
830
-		break;
831
-	}
832
-
833
-out:
834
-	return skb;
835
-}
836
-
837
-unsigned int ipvlan_nf_input(void *priv, struct sk_buff *skb,
838
-			     const struct nf_hook_state *state)
839
-{
840
-	struct ipvl_addr *addr;
841
-	unsigned int len;
842
-
843
-	addr = ipvlan_skb_to_addr(skb, skb->dev);
844
-	if (!addr)
845
-		goto out;
846
-
847
-	skb->dev = addr->master->dev;
848
-	len = skb->len + ETH_HLEN;
849
-	ipvlan_count_rx(addr->master, len, true, false);
850
-out:
851
-	return NF_ACCEPT;
852767 }