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net: convert bonding to use rx_handler 

This patch converts bonding to use rx_handler. Results in cleaner
__netif_receive_skb() with much less exceptions needed. Also
bond-specific work is moved into bond code.

Did performance test using pktgen and counting incoming packets by
iptables. No regression noted.

Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Reviewed-by: Nicolas de Pesloüan <nicolas.2p.debian@free.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko 2011-02-23 09:05:42 +00:00 committed by David S. Miller
parent e3dfa389fd
commit 5b2c4dd2ec
1 changed files with 73 additions and 1 deletions
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74
drivers/net/bonding/bond_main.c
View File

@ -1466,6 +1466,67 @@ static void bond_setup_by_slave(struct net_device *bond_dev,
bond->setup_by_slave = 1;
}
/* On bonding slaves other than the currently active slave, suppress
* duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and
* ARP on active-backup slaves with arp_validate enabled.
*/
static bool bond_should_deliver_exact_match(struct sk_buff *skb,
struct net_device *slave_dev,
struct net_device *bond_dev)
{
if (slave_dev->priv_flags & IFF_SLAVE_INACTIVE) {
if (slave_dev->priv_flags & IFF_SLAVE_NEEDARP &&
skb->protocol == __cpu_to_be16(ETH_P_ARP))
return false;
if (bond_dev->priv_flags & IFF_MASTER_ALB &&
skb->pkt_type != PACKET_BROADCAST &&
skb->pkt_type != PACKET_MULTICAST)
return false;
if (bond_dev->priv_flags & IFF_MASTER_8023AD &&
skb->protocol == __cpu_to_be16(ETH_P_SLOW))
return false;
return true;
}
return false;
}
static struct sk_buff *bond_handle_frame(struct sk_buff *skb)
{
struct net_device *slave_dev;
struct net_device *bond_dev;
skb = skb_share_check(skb, GFP_ATOMIC);
if (unlikely(!skb))
return NULL;
slave_dev = skb->dev;
bond_dev = ACCESS_ONCE(slave_dev->master);
if (unlikely(!bond_dev))
return skb;
if (bond_dev->priv_flags & IFF_MASTER_ARPMON)
slave_dev->last_rx = jiffies;
if (bond_should_deliver_exact_match(skb, slave_dev, bond_dev)) {
skb->deliver_no_wcard = 1;
return skb;
}
skb->dev = bond_dev;
if (bond_dev->priv_flags & IFF_MASTER_ALB &&
bond_dev->priv_flags & IFF_BRIDGE_PORT &&
skb->pkt_type == PACKET_HOST) {
u16 *dest = (u16 *) eth_hdr(skb)->h_dest;
memcpy(dest, bond_dev->dev_addr, ETH_ALEN);
}
return skb;
}
/* enslave device <slave> to bond device <master> */
int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
{
@ -1642,11 +1703,17 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
pr_debug("Error %d calling netdev_set_bond_master\n", res);
goto err_restore_mac;
}
res = netdev_rx_handler_register(slave_dev, bond_handle_frame, NULL);
if (res) {
pr_debug("Error %d calling netdev_rx_handler_register\n", res);
goto err_unset_master;
}
/* open the slave since the application closed it */
res = dev_open(slave_dev);
if (res) {
pr_debug("Opening slave %s failed\n", slave_dev->name);
goto err_unset_master;
goto err_unreg_rxhandler;
}
new_slave->dev = slave_dev;
@ -1856,6 +1923,9 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
err_close:
dev_close(slave_dev);
err_unreg_rxhandler:
netdev_rx_handler_unregister(slave_dev);
err_unset_master:
netdev_set_bond_master(slave_dev, NULL);
@ -2037,6 +2107,7 @@ int bond_release(struct net_device *bond_dev, struct net_device *slave_dev)
netif_addr_unlock_bh(bond_dev);
}
netdev_rx_handler_unregister(slave_dev);
netdev_set_bond_master(slave_dev, NULL);
slave_disable_netpoll(slave);
@ -2150,6 +2221,7 @@ static int bond_release_all(struct net_device *bond_dev)
netif_addr_unlock_bh(bond_dev);
}
netdev_rx_handler_unregister(slave_dev);
netdev_set_bond_master(slave_dev, NULL);
slave_disable_netpoll(slave);