macvlan.c (97eb3f24352ec6632c2127b35d8087d2a809a9b9) macvlan.c (d5cd92448fded12c91f7574e49747c5f7d975a8d)
1/*
2 * Copyright (c) 2007 Patrick McHardy <kaber@trash.net>
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of
7 * the License, or (at your option) any later version.
8 *

--- 25 unchanged lines hidden (view full) ---

34#define MACVLAN_HASH_SIZE (1 << BITS_PER_BYTE)
35
36struct macvlan_port {
37 struct net_device *dev;
38 struct hlist_head vlan_hash[MACVLAN_HASH_SIZE];
39 struct list_head vlans;
40 struct rcu_head rcu;
41 bool passthru;
1/*
2 * Copyright (c) 2007 Patrick McHardy <kaber@trash.net>
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of
7 * the License, or (at your option) any later version.
8 *

--- 25 unchanged lines hidden (view full) ---

34#define MACVLAN_HASH_SIZE (1 << BITS_PER_BYTE)
35
36struct macvlan_port {
37 struct net_device *dev;
38 struct hlist_head vlan_hash[MACVLAN_HASH_SIZE];
39 struct list_head vlans;
40 struct rcu_head rcu;
41 bool passthru;
42 int count;
42};
43
43};
44
45static void macvlan_port_destroy(struct net_device *dev);
46
44#define macvlan_port_get_rcu(dev) \
45 ((struct macvlan_port *) rcu_dereference(dev->rx_handler_data))
46#define macvlan_port_get(dev) ((struct macvlan_port *) dev->rx_handler_data)
47#define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT)
48
49static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port,
50 const unsigned char *addr)
51{

--- 95 unchanged lines hidden (view full) ---

147 mode == MACVLAN_MODE_BRIDGE);
148 macvlan_count_rx(vlan, skb->len + ETH_HLEN,
149 err == NET_RX_SUCCESS, 1);
150 }
151 }
152}
153
154/* called under rcu_read_lock() from netif_receive_skb */
47#define macvlan_port_get_rcu(dev) \
48 ((struct macvlan_port *) rcu_dereference(dev->rx_handler_data))
49#define macvlan_port_get(dev) ((struct macvlan_port *) dev->rx_handler_data)
50#define macvlan_port_exists(dev) (dev->priv_flags & IFF_MACVLAN_PORT)
51
52static struct macvlan_dev *macvlan_hash_lookup(const struct macvlan_port *port,
53 const unsigned char *addr)
54{

--- 95 unchanged lines hidden (view full) ---

150 mode == MACVLAN_MODE_BRIDGE);
151 macvlan_count_rx(vlan, skb->len + ETH_HLEN,
152 err == NET_RX_SUCCESS, 1);
153 }
154 }
155}
156
157/* called under rcu_read_lock() from netif_receive_skb */
155static struct sk_buff *macvlan_handle_frame(struct sk_buff *skb)
158static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb)
156{
157 struct macvlan_port *port;
159{
160 struct macvlan_port *port;
161 struct sk_buff *skb = *pskb;
158 const struct ethhdr *eth = eth_hdr(skb);
159 const struct macvlan_dev *vlan;
160 const struct macvlan_dev *src;
161 struct net_device *dev;
162 unsigned int len = 0;
163 int ret = NET_RX_DROP;
164
165 port = macvlan_port_get_rcu(skb->dev);

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179 MACVLAN_MODE_BRIDGE);
180 else if (src->mode == MACVLAN_MODE_BRIDGE)
181 /*
182 * flood only to VEPA ports, bridge ports
183 * already saw the frame on the way out.
184 */
185 macvlan_broadcast(skb, port, src->dev,
186 MACVLAN_MODE_VEPA);
162 const struct ethhdr *eth = eth_hdr(skb);
163 const struct macvlan_dev *vlan;
164 const struct macvlan_dev *src;
165 struct net_device *dev;
166 unsigned int len = 0;
167 int ret = NET_RX_DROP;
168
169 port = macvlan_port_get_rcu(skb->dev);

--- 13 unchanged lines hidden (view full) ---

183 MACVLAN_MODE_BRIDGE);
184 else if (src->mode == MACVLAN_MODE_BRIDGE)
185 /*
186 * flood only to VEPA ports, bridge ports
187 * already saw the frame on the way out.
188 */
189 macvlan_broadcast(skb, port, src->dev,
190 MACVLAN_MODE_VEPA);
187 return skb;
191 return RX_HANDLER_PASS;
188 }
189
190 if (port->passthru)
191 vlan = list_first_entry(&port->vlans, struct macvlan_dev, list);
192 else
193 vlan = macvlan_hash_lookup(port, eth->h_dest);
194 if (vlan == NULL)
192 }
193
194 if (port->passthru)
195 vlan = list_first_entry(&port->vlans, struct macvlan_dev, list);
196 else
197 vlan = macvlan_hash_lookup(port, eth->h_dest);
198 if (vlan == NULL)
195 return skb;
199 return RX_HANDLER_PASS;
196
197 dev = vlan->dev;
198 if (unlikely(!(dev->flags & IFF_UP))) {
199 kfree_skb(skb);
200
201 dev = vlan->dev;
202 if (unlikely(!(dev->flags & IFF_UP))) {
203 kfree_skb(skb);
200 return NULL;
204 return RX_HANDLER_CONSUMED;
201 }
202 len = skb->len + ETH_HLEN;
203 skb = skb_share_check(skb, GFP_ATOMIC);
204 if (!skb)
205 goto out;
206
207 skb->dev = dev;
208 skb->pkt_type = PACKET_HOST;
209
210 ret = vlan->receive(skb);
211
212out:
213 macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, 0);
205 }
206 len = skb->len + ETH_HLEN;
207 skb = skb_share_check(skb, GFP_ATOMIC);
208 if (!skb)
209 goto out;
210
211 skb->dev = dev;
212 skb->pkt_type = PACKET_HOST;
213
214 ret = vlan->receive(skb);
215
216out:
217 macvlan_count_rx(vlan, len, ret == NET_RX_SUCCESS, 0);
214 return NULL;
218 return RX_HANDLER_CONSUMED;
215}
216
217static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev)
218{
219 const struct macvlan_dev *vlan = netdev_priv(dev);
220 const struct macvlan_port *port = vlan->port;
221 const struct macvlan_dev *dest;
219}
220
221static int macvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev)
222{
223 const struct macvlan_dev *vlan = netdev_priv(dev);
224 const struct macvlan_port *port = vlan->port;
225 const struct macvlan_dev *dest;
226 __u8 ip_summed = skb->ip_summed;
222
223 if (vlan->mode == MACVLAN_MODE_BRIDGE) {
224 const struct ethhdr *eth = (void *)skb->data;
227
228 if (vlan->mode == MACVLAN_MODE_BRIDGE) {
229 const struct ethhdr *eth = (void *)skb->data;
230 skb->ip_summed = CHECKSUM_UNNECESSARY;
225
226 /* send to other bridge ports directly */
227 if (is_multicast_ether_addr(eth->h_dest)) {
228 macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE);
229 goto xmit_world;
230 }
231
232 dest = macvlan_hash_lookup(port, eth->h_dest);
233 if (dest && dest->mode == MACVLAN_MODE_BRIDGE) {
234 unsigned int length = skb->len + ETH_HLEN;
235 int ret = dest->forward(dest->dev, skb);
236 macvlan_count_rx(dest, length,
237 ret == NET_RX_SUCCESS, 0);
238
239 return NET_XMIT_SUCCESS;
240 }
241 }
242
243xmit_world:
231
232 /* send to other bridge ports directly */
233 if (is_multicast_ether_addr(eth->h_dest)) {
234 macvlan_broadcast(skb, port, dev, MACVLAN_MODE_BRIDGE);
235 goto xmit_world;
236 }
237
238 dest = macvlan_hash_lookup(port, eth->h_dest);
239 if (dest && dest->mode == MACVLAN_MODE_BRIDGE) {
240 unsigned int length = skb->len + ETH_HLEN;
241 int ret = dest->forward(dest->dev, skb);
242 macvlan_count_rx(dest, length,
243 ret == NET_RX_SUCCESS, 0);
244
245 return NET_XMIT_SUCCESS;
246 }
247 }
248
249xmit_world:
250 skb->ip_summed = ip_summed;
244 skb_set_dev(skb, vlan->lowerdev);
245 return dev_queue_xmit(skb);
246}
247
248netdev_tx_t macvlan_start_xmit(struct sk_buff *skb,
249 struct net_device *dev)
250{
251 unsigned int len = skb->len;

--- 196 unchanged lines hidden (view full) ---

448 return -ENOMEM;
449
450 return 0;
451}
452
453static void macvlan_uninit(struct net_device *dev)
454{
455 struct macvlan_dev *vlan = netdev_priv(dev);
251 skb_set_dev(skb, vlan->lowerdev);
252 return dev_queue_xmit(skb);
253}
254
255netdev_tx_t macvlan_start_xmit(struct sk_buff *skb,
256 struct net_device *dev)
257{
258 unsigned int len = skb->len;

--- 196 unchanged lines hidden (view full) ---

455 return -ENOMEM;
456
457 return 0;
458}
459
460static void macvlan_uninit(struct net_device *dev)
461{
462 struct macvlan_dev *vlan = netdev_priv(dev);
463 struct macvlan_port *port = vlan->port;
456
457 free_percpu(vlan->pcpu_stats);
464
465 free_percpu(vlan->pcpu_stats);
466
467 port->count -= 1;
468 if (!port->count)
469 macvlan_port_destroy(port->dev);
458}
459
460static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev,
461 struct rtnl_link_stats64 *stats)
462{
463 struct macvlan_dev *vlan = netdev_priv(dev);
464
465 if (vlan->pcpu_stats) {

--- 216 unchanged lines hidden (view full) ---

682 vlan->receive = receive;
683 vlan->forward = forward;
684
685 vlan->mode = MACVLAN_MODE_VEPA;
686 if (data && data[IFLA_MACVLAN_MODE])
687 vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
688
689 if (vlan->mode == MACVLAN_MODE_PASSTHRU) {
470}
471
472static struct rtnl_link_stats64 *macvlan_dev_get_stats64(struct net_device *dev,
473 struct rtnl_link_stats64 *stats)
474{
475 struct macvlan_dev *vlan = netdev_priv(dev);
476
477 if (vlan->pcpu_stats) {

--- 216 unchanged lines hidden (view full) ---

694 vlan->receive = receive;
695 vlan->forward = forward;
696
697 vlan->mode = MACVLAN_MODE_VEPA;
698 if (data && data[IFLA_MACVLAN_MODE])
699 vlan->mode = nla_get_u32(data[IFLA_MACVLAN_MODE]);
700
701 if (vlan->mode == MACVLAN_MODE_PASSTHRU) {
690 if (!list_empty(&port->vlans))
702 if (port->count)
691 return -EINVAL;
692 port->passthru = true;
693 memcpy(dev->dev_addr, lowerdev->dev_addr, ETH_ALEN);
694 }
695
703 return -EINVAL;
704 port->passthru = true;
705 memcpy(dev->dev_addr, lowerdev->dev_addr, ETH_ALEN);
706 }
707
708 port->count += 1;
696 err = register_netdevice(dev);
697 if (err < 0)
698 goto destroy_port;
699
700 list_add_tail(&vlan->list, &port->vlans);
701 netif_stacked_transfer_operstate(lowerdev, dev);
702
703 return 0;
704
705destroy_port:
709 err = register_netdevice(dev);
710 if (err < 0)
711 goto destroy_port;
712
713 list_add_tail(&vlan->list, &port->vlans);
714 netif_stacked_transfer_operstate(lowerdev, dev);
715
716 return 0;
717
718destroy_port:
706 if (list_empty(&port->vlans))
719 port->count -= 1;
720 if (!port->count)
707 macvlan_port_destroy(lowerdev);
708
709 return err;
710}
711EXPORT_SYMBOL_GPL(macvlan_common_newlink);
712
713static int macvlan_newlink(struct net *src_net, struct net_device *dev,
714 struct nlattr *tb[], struct nlattr *data[])
715{
716 return macvlan_common_newlink(src_net, dev, tb, data,
717 netif_rx,
718 dev_forward_skb);
719}
720
721void macvlan_dellink(struct net_device *dev, struct list_head *head)
722{
723 struct macvlan_dev *vlan = netdev_priv(dev);
721 macvlan_port_destroy(lowerdev);
722
723 return err;
724}
725EXPORT_SYMBOL_GPL(macvlan_common_newlink);
726
727static int macvlan_newlink(struct net *src_net, struct net_device *dev,
728 struct nlattr *tb[], struct nlattr *data[])
729{
730 return macvlan_common_newlink(src_net, dev, tb, data,
731 netif_rx,
732 dev_forward_skb);
733}
734
735void macvlan_dellink(struct net_device *dev, struct list_head *head)
736{
737 struct macvlan_dev *vlan = netdev_priv(dev);
724 struct macvlan_port *port = vlan->port;
725
726 list_del(&vlan->list);
727 unregister_netdevice_queue(dev, head);
738
739 list_del(&vlan->list);
740 unregister_netdevice_queue(dev, head);
728
729 if (list_empty(&port->vlans))
730 macvlan_port_destroy(port->dev);
731}
732EXPORT_SYMBOL_GPL(macvlan_dellink);
733
734static int macvlan_changelink(struct net_device *dev,
735 struct nlattr *tb[], struct nlattr *data[])
736{
737 struct macvlan_dev *vlan = netdev_priv(dev);
738 if (data && data[IFLA_MACVLAN_MODE])

--- 119 unchanged lines hidden --- 		741}
742EXPORT_SYMBOL_GPL(macvlan_dellink);
743
744static int macvlan_changelink(struct net_device *dev,
745 struct nlattr *tb[], struct nlattr *data[])
746{
747 struct macvlan_dev *vlan = netdev_priv(dev);
748 if (data && data[IFLA_MACVLAN_MODE])

--- 119 unchanged lines hidden ---