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2023-12-08 01573e231f18eb2d99162747186f59511f56b64d 
 kernel/drivers/net/ipvlan/ipvlan_main.c
....@@ -1,80 +1,13 @@
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"
116 
12
-static unsigned int ipvlan_netid __read_mostly;
13
-
14
-struct ipvlan_netns {
15
-	unsigned int ipvl_nf_hook_refcnt;
16
-};
17
-
18
-static const struct nf_hook_ops ipvl_nfops[] = {
19
-	{
20
-		.hook     = ipvlan_nf_input,
21
-		.pf       = NFPROTO_IPV4,
22
-		.hooknum  = NF_INET_LOCAL_IN,
23
-		.priority = INT_MAX,
24
-	},
25
-#if IS_ENABLED(CONFIG_IPV6)
26
-	{
27
-		.hook     = ipvlan_nf_input,
28
-		.pf       = NFPROTO_IPV6,
29
-		.hooknum  = NF_INET_LOCAL_IN,
30
-		.priority = INT_MAX,
31
-	},
32
-#endif
33
-};
34
-
35
-static const struct l3mdev_ops ipvl_l3mdev_ops = {
36
-	.l3mdev_l3_rcv = ipvlan_l3_rcv,
37
-};
38
-
39
-static void ipvlan_adjust_mtu(struct ipvl_dev *ipvlan, struct net_device *dev)
40
-{
41
-	ipvlan->dev->mtu = dev->mtu;
42
-}
43
-
44
-static int ipvlan_register_nf_hook(struct net *net)
45
-{
46
-	struct ipvlan_netns *vnet = net_generic(net, ipvlan_netid);
47
-	int err = 0;
48
-
49
-	if (!vnet->ipvl_nf_hook_refcnt) {
50
-		err = nf_register_net_hooks(net, ipvl_nfops,
51
-					    ARRAY_SIZE(ipvl_nfops));
52
-		if (!err)
53
-			vnet->ipvl_nf_hook_refcnt = 1;
54
-	} else {
55
-		vnet->ipvl_nf_hook_refcnt++;
56
-	}
57
-
58
-	return err;
59
-}
60
-
61
-static void ipvlan_unregister_nf_hook(struct net *net)
62
-{
63
-	struct ipvlan_netns *vnet = net_generic(net, ipvlan_netid);
64
-
65
-	if (WARN_ON(!vnet->ipvl_nf_hook_refcnt))
66
-		return;
67
-
68
-	vnet->ipvl_nf_hook_refcnt--;
69
-	if (!vnet->ipvl_nf_hook_refcnt)
70
-		nf_unregister_net_hooks(net, ipvl_nfops,
71
-					ARRAY_SIZE(ipvl_nfops));
72
-}
73
-
74
-static int ipvlan_set_port_mode(struct ipvl_port *port, u16 nval)
7
+static int ipvlan_set_port_mode(struct ipvl_port *port, u16 nval,
8
+				struct netlink_ext_ack *extack)
759 {
7610 	struct ipvl_dev *ipvlan;
77
-	struct net_device *mdev = port->dev;
7811 	unsigned int flags;
7912 	int err;
8013 
....@@ -84,27 +17,24 @@
8417 			flags = ipvlan->dev->flags;
8518 			if (nval == IPVLAN_MODE_L3 || nval == IPVLAN_MODE_L3S) {
8619 				err = dev_change_flags(ipvlan->dev,
87
-						       flags | IFF_NOARP);
20
+						       flags | IFF_NOARP,
21
+						       extack);
8822 			} else {
8923 				err = dev_change_flags(ipvlan->dev,
90
-						       flags & ~IFF_NOARP);
24
+						       flags & ~IFF_NOARP,
25
+						       extack);
9126 			}
9227 			if (unlikely(err))
9328 				goto fail;
9429 		}
9530 		if (nval == IPVLAN_MODE_L3S) {
9631 			/* New mode is L3S */
97
-			err = ipvlan_register_nf_hook(read_pnet(&port->pnet));
98
-			if (!err) {
99
-				mdev->l3mdev_ops = &ipvl_l3mdev_ops;
100
-				mdev->priv_flags |= IFF_L3MDEV_RX_HANDLER;
101
-			} else
32
+			err = ipvlan_l3s_register(port);
33
+			if (err)
10234 				goto fail;
10335 		} else if (port->mode == IPVLAN_MODE_L3S) {
10436 			/* Old mode was L3S */
105
-			mdev->priv_flags &= ~IFF_L3MDEV_RX_HANDLER;
106
-			ipvlan_unregister_nf_hook(read_pnet(&port->pnet));
107
-			mdev->l3mdev_ops = NULL;
37
+			ipvlan_l3s_unregister(port);
10838 		}
10939 		port->mode = nval;
11040 	}
....@@ -116,9 +46,11 @@
11646 		flags = ipvlan->dev->flags;
11747 		if (port->mode == IPVLAN_MODE_L3 ||
11848 		    port->mode == IPVLAN_MODE_L3S)
119
-			dev_change_flags(ipvlan->dev, flags | IFF_NOARP);
49
+			dev_change_flags(ipvlan->dev, flags | IFF_NOARP,
50
+					 NULL);
12051 		else
121
-			dev_change_flags(ipvlan->dev, flags & ~IFF_NOARP);
52
+			dev_change_flags(ipvlan->dev, flags & ~IFF_NOARP,
53
+					 NULL);
12254 	}
12355 
12456 	return err;
....@@ -161,11 +93,8 @@
16193 	struct ipvl_port *port = ipvlan_port_get_rtnl(dev);
16294 	struct sk_buff *skb;
16395 
164
-	if (port->mode == IPVLAN_MODE_L3S) {
165
-		dev->priv_flags &= ~IFF_L3MDEV_RX_HANDLER;
166
-		ipvlan_unregister_nf_hook(dev_net(dev));
167
-		dev->l3mdev_ops = NULL;
168
-	}
96
+	if (port->mode == IPVLAN_MODE_L3S)
97
+		ipvlan_l3s_unregister(port);
16998 	netdev_rx_handler_unregister(dev);
17099 	cancel_work_sync(&port->wq);
171100 	while ((skb = __skb_dequeue(&port->backlog)) != NULL) {
....@@ -186,8 +115,8 @@
186115 
187116 #define IPVLAN_FEATURES \
188117 	(NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA | NETIF_F_FRAGLIST | \
189
-	 NETIF_F_GSO | NETIF_F_TSO | NETIF_F_GSO_ROBUST | \
190
-	 NETIF_F_TSO_ECN | NETIF_F_TSO6 | NETIF_F_GRO | NETIF_F_RXCSUM | \
118
+	 NETIF_F_GSO | NETIF_F_ALL_TSO | NETIF_F_GSO_ROBUST | \
119
+	 NETIF_F_GRO | NETIF_F_RXCSUM | \
191120 	 NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_STAG_FILTER)
192121 
193122 	/* NETIF_F_GSO_ENCAP_ALL NETIF_F_GSO_SOFTWARE Newly added */
....@@ -208,6 +137,7 @@
208137 	dev->features |= IPVLAN_ALWAYS_ON;
209138 	dev->vlan_features = phy_dev->vlan_features & IPVLAN_FEATURES;
210139 	dev->vlan_features |= IPVLAN_ALWAYS_ON_OFLOADS;
140
+	dev->hw_enc_features |= dev->features;
211141 	dev->gso_max_size = phy_dev->gso_max_size;
212142 	dev->gso_max_segs = phy_dev->gso_max_segs;
213143 	dev->hard_header_len = phy_dev->hard_header_len;
....@@ -456,6 +386,11 @@
456386 	.cache_update	= eth_header_cache_update,
457387 };
458388 
389
+static void ipvlan_adjust_mtu(struct ipvl_dev *ipvlan, struct net_device *dev)
390
+{
391
+	ipvlan->dev->mtu = dev->mtu;
392
+}
393
+
459394 static bool netif_is_ipvlan(const struct net_device *dev)
460395 {
461396 	/* both ipvlan and ipvtap devices use the same netdev_ops */
....@@ -515,7 +450,7 @@
515450 	if (data[IFLA_IPVLAN_MODE]) {
516451 		u16 nmode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
517452 
518
-		err = ipvlan_set_port_mode(port, nmode);
453
+		err = ipvlan_set_port_mode(port, nmode, extack);
519454 	}
520455 
521456 	if (!err && data[IFLA_IPVLAN_FLAGS]) {
....@@ -552,7 +487,7 @@
552487 	if (data[IFLA_IPVLAN_MODE]) {
553488 		u16 mode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
554489 
555
-		if (mode < IPVLAN_MODE_L2 || mode >= IPVLAN_MODE_MAX)
490
+		if (mode >= IPVLAN_MODE_MAX)
556491 			return -EINVAL;
557492 	}
558493 	if (data[IFLA_IPVLAN_FLAGS]) {
....@@ -691,7 +626,7 @@
691626 	if (data && data[IFLA_IPVLAN_MODE])
692627 		mode = nla_get_u16(data[IFLA_IPVLAN_MODE]);
693628 
694
-	err = ipvlan_set_port_mode(port, mode);
629
+	err = ipvlan_set_port_mode(port, mode, extack);
695630 	if (err)
696631 		goto unlink_netdev;
697632 
....@@ -749,6 +684,13 @@
749684 	[IFLA_IPVLAN_FLAGS] = { .type = NLA_U16 },
750685 };
751686 
687
+static struct net *ipvlan_get_link_net(const struct net_device *dev)
688
+{
689
+	struct ipvl_dev *ipvlan = netdev_priv(dev);
690
+
691
+	return dev_net(ipvlan->phy_dev);
692
+}
693
+
752694 static struct rtnl_link_ops ipvlan_link_ops = {
753695 	.kind		= "ipvlan",
754696 	.priv_size	= sizeof(struct ipvl_dev),
....@@ -756,6 +698,7 @@
756698 	.setup		= ipvlan_link_setup,
757699 	.newlink	= ipvlan_link_new,
758700 	.dellink	= ipvlan_link_delete,
701
+	.get_link_net   = ipvlan_get_link_net,
759702 };
760703 
761704 int ipvlan_link_register(struct rtnl_link_ops *ops)
....@@ -773,10 +716,13 @@
773716 static int ipvlan_device_event(struct notifier_block *unused,
774717 			       unsigned long event, void *ptr)
775718 {
719
+	struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr);
720
+	struct netdev_notifier_pre_changeaddr_info *prechaddr_info;
776721 	struct net_device *dev = netdev_notifier_info_to_dev(ptr);
777722 	struct ipvl_dev *ipvlan, *next;
778723 	struct ipvl_port *port;
779724 	LIST_HEAD(lst_kill);
725
+	int err;
780726 
781727 	if (!netif_is_ipvlan_port(dev))
782728 		return NOTIFY_DONE;
....@@ -792,7 +738,6 @@
792738 
793739 	case NETDEV_REGISTER: {
794740 		struct net *oldnet, *newnet = dev_net(dev);
795
-		struct ipvlan_netns *old_vnet;
796741 
797742 		oldnet = read_pnet(&port->pnet);
798743 		if (net_eq(newnet, oldnet))
....@@ -800,12 +745,7 @@
800745 
801746 		write_pnet(&port->pnet, newnet);
802747 
803
-		old_vnet = net_generic(oldnet, ipvlan_netid);
804
-		if (!old_vnet->ipvl_nf_hook_refcnt)
805
-			break;
806
-
807
-		ipvlan_register_nf_hook(newnet);
808
-		ipvlan_unregister_nf_hook(oldnet);
748
+		ipvlan_migrate_l3s_hook(oldnet, newnet);
809749 		break;
810750 	}
811751 	case NETDEV_UNREGISTER:
....@@ -829,6 +769,17 @@
829769 	case NETDEV_CHANGEMTU:
830770 		list_for_each_entry(ipvlan, &port->ipvlans, pnode)
831771 			ipvlan_adjust_mtu(ipvlan, dev);
772
+		break;
773
+
774
+	case NETDEV_PRE_CHANGEADDR:
775
+		prechaddr_info = ptr;
776
+		list_for_each_entry(ipvlan, &port->ipvlans, pnode) {
777
+			err = dev_pre_changeaddr_notify(ipvlan->dev,
778
+						    prechaddr_info->dev_addr,
779
+						    extack);
780
+			if (err)
781
+				return notifier_from_errno(err);
782
+		}
832783 		break;
833784 
834785 	case NETDEV_CHANGEADDR:
....@@ -1067,23 +1018,6 @@
10671018 };
10681019 #endif
10691020 
1070
-static void ipvlan_ns_exit(struct net *net)
1071
-{
1072
-	struct ipvlan_netns *vnet = net_generic(net, ipvlan_netid);
1073
-
1074
-	if (WARN_ON_ONCE(vnet->ipvl_nf_hook_refcnt)) {
1075
-		vnet->ipvl_nf_hook_refcnt = 0;
1076
-		nf_unregister_net_hooks(net, ipvl_nfops,
1077
-					ARRAY_SIZE(ipvl_nfops));
1078
-	}
1079
-}
1080
-
1081
-static struct pernet_operations ipvlan_net_ops = {
1082
-	.id = &ipvlan_netid,
1083
-	.size = sizeof(struct ipvlan_netns),
1084
-	.exit = ipvlan_ns_exit,
1085
-};
1086
-
10871021 static int __init ipvlan_init_module(void)
10881022 {
10891023 	int err;
....@@ -1098,13 +1032,13 @@
10981032 	register_inetaddr_notifier(&ipvlan_addr4_notifier_block);
10991033 	register_inetaddr_validator_notifier(&ipvlan_addr4_vtor_notifier_block);
11001034 
1101
-	err = register_pernet_subsys(&ipvlan_net_ops);
1035
+	err = ipvlan_l3s_init();
11021036 	if (err < 0)
11031037 		goto error;
11041038 
11051039 	err = ipvlan_link_register(&ipvlan_link_ops);
11061040 	if (err < 0) {
1107
-		unregister_pernet_subsys(&ipvlan_net_ops);
1041
+		ipvlan_l3s_cleanup();
11081042 		goto error;
11091043 	}
11101044 
....@@ -1125,7 +1059,7 @@
11251059 static void __exit ipvlan_cleanup_module(void)
11261060 {
11271061 	rtnl_link_unregister(&ipvlan_link_ops);
1128
-	unregister_pernet_subsys(&ipvlan_net_ops);
1062
+	ipvlan_l3s_cleanup();
11291063 	unregister_netdevice_notifier(&ipvlan_notifier_block);
11301064 	unregister_inetaddr_notifier(&ipvlan_addr4_notifier_block);
11311065 	unregister_inetaddr_validator_notifier(