#include <linux/if_link.h>
#include <linux/if_macvlan.h>
#include <linux/hash.h>
+#include <linux/workqueue.h>
#include <net/rtnetlink.h>
#include <net/xfrm.h>
struct hlist_head vlan_hash[MACVLAN_HASH_SIZE];
struct list_head vlans;
struct rcu_head rcu;
+ struct sk_buff_head bc_queue;
+ struct work_struct bc_work;
bool passthru;
- int count;
};
+#define MACVLAN_PORT_IS_EMPTY(port) list_empty(&port->vlans)
+
+struct macvlan_skb_cb {
+ const struct macvlan_dev *src;
+};
+
+#define MACVLAN_SKB_CB(__skb) ((struct macvlan_skb_cb *)&((__skb)->cb[0]))
+
static void macvlan_port_destroy(struct net_device *dev);
static struct macvlan_port *macvlan_port_get_rcu(const struct net_device *dev)
struct net_device *dev = vlan->dev;
if (local)
- return dev_forward_skb(dev, skb);
+ return __dev_forward_skb(dev, skb);
skb->dev = dev;
if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast))
else
skb->pkt_type = PACKET_MULTICAST;
- return netif_rx(skb);
+ return 0;
}
static u32 macvlan_hash_mix(const struct macvlan_dev *vlan)
if (likely(nskb))
err = macvlan_broadcast_one(
nskb, vlan, eth,
- mode == MACVLAN_MODE_BRIDGE);
+ mode == MACVLAN_MODE_BRIDGE) ?:
+ netif_rx_ni(nskb);
macvlan_count_rx(vlan, skb->len + ETH_HLEN,
err == NET_RX_SUCCESS, 1);
}
}
}
-/* called under rcu_read_lock() from netif_receive_skb */
-static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb)
+static void macvlan_process_broadcast(struct work_struct *w)
{
- struct macvlan_port *port;
- struct sk_buff *skb = *pskb;
- const struct ethhdr *eth = eth_hdr(skb);
- const struct macvlan_dev *vlan;
- const struct macvlan_dev *src;
- struct net_device *dev;
- unsigned int len = 0;
- int ret = NET_RX_DROP;
+ struct macvlan_port *port = container_of(w, struct macvlan_port,
+ bc_work);
+ struct sk_buff *skb;
+ struct sk_buff_head list;
+
+ skb_queue_head_init(&list);
+
+ spin_lock_bh(&port->bc_queue.lock);
+ skb_queue_splice_tail_init(&port->bc_queue, &list);
+ spin_unlock_bh(&port->bc_queue.lock);
+
+ while ((skb = __skb_dequeue(&list))) {
+ const struct macvlan_dev *src = MACVLAN_SKB_CB(skb)->src;
+
+ rcu_read_lock();
- port = macvlan_port_get_rcu(skb->dev);
- if (is_multicast_ether_addr(eth->h_dest)) {
- skb = ip_check_defrag(skb, IP_DEFRAG_MACVLAN);
- if (!skb)
- return RX_HANDLER_CONSUMED;
- eth = eth_hdr(skb);
- src = macvlan_hash_lookup(port, eth->h_source);
if (!src)
/* frame comes from an external address */
macvlan_broadcast(skb, port, NULL,
macvlan_broadcast(skb, port, src->dev,
MACVLAN_MODE_VEPA |
MACVLAN_MODE_BRIDGE);
- else if (src->mode == MACVLAN_MODE_BRIDGE)
+ else
/*
* flood only to VEPA ports, bridge ports
* already saw the frame on the way out.
*/
macvlan_broadcast(skb, port, src->dev,
MACVLAN_MODE_VEPA);
- else {
+
+ rcu_read_unlock();
+
+ kfree_skb(skb);
+ }
+}
+
+static void macvlan_broadcast_enqueue(struct macvlan_port *port,
+ struct sk_buff *skb)
+{
+ struct sk_buff *nskb;
+ int err = -ENOMEM;
+
+ nskb = skb_clone(skb, GFP_ATOMIC);
+ if (!nskb)
+ goto err;
+
+ spin_lock(&port->bc_queue.lock);
+ if (skb_queue_len(&port->bc_queue) < skb->dev->tx_queue_len) {
+ __skb_queue_tail(&port->bc_queue, nskb);
+ err = 0;
+ }
+ spin_unlock(&port->bc_queue.lock);
+
+ if (err)
+ goto free_nskb;
+
+ schedule_work(&port->bc_work);
+ return;
+
+free_nskb:
+ kfree_skb(nskb);
+err:
+ atomic_long_inc(&skb->dev->rx_dropped);
+}
+
+/* called under rcu_read_lock() from netif_receive_skb */
+static rx_handler_result_t macvlan_handle_frame(struct sk_buff **pskb)
+{
+ struct macvlan_port *port;
+ struct sk_buff *skb = *pskb;
+ const struct ethhdr *eth = eth_hdr(skb);
+ const struct macvlan_dev *vlan;
+ const struct macvlan_dev *src;
+ struct net_device *dev;
+ unsigned int len = 0;
+ int ret = NET_RX_DROP;
+
+ port = macvlan_port_get_rcu(skb->dev);
+ if (is_multicast_ether_addr(eth->h_dest)) {
+ skb = ip_check_defrag(skb, IP_DEFRAG_MACVLAN);
+ if (!skb)
+ return RX_HANDLER_CONSUMED;
+ eth = eth_hdr(skb);
+ src = macvlan_hash_lookup(port, eth->h_source);
+ if (src && src->mode != MACVLAN_MODE_VEPA &&
+ src->mode != MACVLAN_MODE_BRIDGE) {
/* forward to original port. */
vlan = src;
- ret = macvlan_broadcast_one(skb, vlan, eth, 0);
+ ret = macvlan_broadcast_one(skb, vlan, eth, 0) ?:
+ netif_rx(skb);
goto out;
}
+ MACVLAN_SKB_CB(skb)->src = src;
+ macvlan_broadcast_enqueue(port, skb);
+
return RX_HANDLER_PASS;
}
const struct macvlan_dev *vlan = netdev_priv(dev);
const struct macvlan_port *port = vlan->port;
const struct macvlan_dev *dest;
- __u8 ip_summed = skb->ip_summed;
if (vlan->mode == MACVLAN_MODE_BRIDGE) {
const struct ethhdr *eth = (void *)skb->data;
- skb->ip_summed = CHECKSUM_UNNECESSARY;
/* send to other bridge ports directly */
if (is_multicast_ether_addr(eth->h_dest)) {
}
xmit_world:
- skb->ip_summed = ip_summed;
skb->dev = vlan->lowerdev;
return dev_queue_xmit(skb);
}
{
struct macvlan_dev *vlan = netdev_priv(dev);
const struct net_device *lowerdev = vlan->lowerdev;
- int i;
dev->state = (dev->state & ~MACVLAN_STATE_MASK) |
(lowerdev->state & MACVLAN_STATE_MASK);
macvlan_set_lockdep_class(dev);
- vlan->pcpu_stats = alloc_percpu(struct vlan_pcpu_stats);
+ vlan->pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats);
if (!vlan->pcpu_stats)
return -ENOMEM;
- for_each_possible_cpu(i) {
- struct vlan_pcpu_stats *mvlstats;
- mvlstats = per_cpu_ptr(vlan->pcpu_stats, i);
- u64_stats_init(&mvlstats->syncp);
- }
-
return 0;
}
free_percpu(vlan->pcpu_stats);
- port->count -= 1;
- if (!port->count)
+ if (MACVLAN_PORT_IS_EMPTY(port))
macvlan_port_destroy(port->dev);
}
for_each_possible_cpu(i) {
p = per_cpu_ptr(vlan->pcpu_stats, i);
do {
- start = u64_stats_fetch_begin_bh(&p->syncp);
+ start = u64_stats_fetch_begin_irq(&p->syncp);
rx_packets = p->rx_packets;
rx_bytes = p->rx_bytes;
rx_multicast = p->rx_multicast;
tx_packets = p->tx_packets;
tx_bytes = p->tx_bytes;
- } while (u64_stats_fetch_retry_bh(&p->syncp, start));
+ } while (u64_stats_fetch_retry_irq(&p->syncp, start));
stats->rx_packets += rx_packets;
stats->rx_bytes += rx_bytes;
for (i = 0; i < MACVLAN_HASH_SIZE; i++)
INIT_HLIST_HEAD(&port->vlan_hash[i]);
+ skb_queue_head_init(&port->bc_queue);
+ INIT_WORK(&port->bc_work, macvlan_process_broadcast);
+
err = netdev_rx_handler_register(dev, macvlan_handle_frame, port);
if (err)
kfree(port);
{
struct macvlan_port *port = macvlan_port_get_rtnl(dev);
+ cancel_work_sync(&port->bc_work);
dev->priv_flags &= ~IFF_MACVLAN_PORT;
netdev_rx_handler_unregister(dev);
kfree_rcu(port, rcu);
vlan->flags = nla_get_u16(data[IFLA_MACVLAN_FLAGS]);
if (vlan->mode == MACVLAN_MODE_PASSTHRU) {
- if (port->count)
+ if (!MACVLAN_PORT_IS_EMPTY(port))
return -EINVAL;
port->passthru = true;
eth_hw_addr_inherit(dev, lowerdev);
}
- port->count += 1;
err = register_netdevice(dev);
if (err < 0)
goto destroy_port;
unregister_netdev:
unregister_netdevice(dev);
destroy_port:
- port->count -= 1;
- if (!port->count)
+ if (MACVLAN_PORT_IS_EMPTY(port))
macvlan_port_destroy(lowerdev);
return err;
netdev_update_features(vlan->dev);
}
break;
+ case NETDEV_CHANGEMTU:
+ list_for_each_entry(vlan, &port->vlans, list) {
+ if (vlan->dev->mtu <= dev->mtu)
+ continue;
+ dev_set_mtu(vlan->dev, dev->mtu);
+ }
+ break;
case NETDEV_UNREGISTER:
/* twiddle thumbs on netns device moves */
if (dev->reg_state != NETREG_UNREGISTERING)
projects / deliverable / linux.git / blobdiff