X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=net%2Fcore%2Fdev.c;h=878203087c07f425339c03fc250bd871ce8bf3d7;hb=f7f1b0f1e2fbadeab12d24236000e778aa9b1ead;hp=9ac8c41ea1c68a3f1b857e436839d44440ae369d;hpb=6a77f38946aaee1cd85eeec6cf4229b204c15071;p=linux-2.6.git diff --git a/net/core/dev.c b/net/core/dev.c index 9ac8c41ea..878203087 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -7,7 +7,7 @@ * 2 of the License, or (at your option) any later version. * * Derived from the non IP parts of dev.c 1.0.19 - * Authors: Ross Biro, + * Authors: Ross Biro * Fred N. van Kempen, * Mark Evans, * @@ -761,6 +761,18 @@ int dev_change_name(struct net_device *dev, char *newname) return err; } +/** + * netdev_features_change - device changes fatures + * @dev: device to cause notification + * + * Called to indicate a device has changed features. + */ +void netdev_features_change(struct net_device *dev) +{ + notifier_call_chain(&netdev_chain, NETDEV_FEAT_CHANGE, dev); +} +EXPORT_SYMBOL(netdev_features_change); + /** * netdev_state_change - device changes state * @dev: device to cause notification @@ -1215,6 +1227,19 @@ int __skb_linearize(struct sk_buff *skb, int gfp_mask) * A negative errno code is returned on a failure. A success does not * guarantee the frame will be transmitted as it may be dropped due * to congestion or traffic shaping. + * + * ----------------------------------------------------------------------------------- + * I notice this method can also return errors from the queue disciplines, + * including NET_XMIT_DROP, which is a positive value. So, errors can also + * be positive. + * + * Regardless of the return value, the skb is consumed, so it is currently + * difficult to retry a send to this method. (You can bump the ref count + * before sending to hold a reference for retry if you are careful.) + * + * When calling this method, interrupts MUST be enabled. This is because + * the BH enable code must have IRQs enabled so that it will not deadlock. + * --BLG */ int dev_queue_xmit(struct sk_buff *skb) @@ -1428,13 +1453,10 @@ int netif_rx(struct sk_buff *skb) struct softnet_data *queue; unsigned long flags; -#ifdef CONFIG_NETPOLL - if (skb->dev->netpoll_rx && netpoll_rx(skb)) { - kfree_skb(skb); + /* if netpoll wants it, pretend we never saw it */ + if (netpoll_rx(skb)) return NET_RX_DROP; - } -#endif - + if (!skb->stamp.tv_sec) net_timestamp(&skb->stamp); @@ -1562,6 +1584,10 @@ static __inline__ int deliver_skb(struct sk_buff *skb, #if defined(CONFIG_BRIDGE) || defined (CONFIG_BRIDGE_MODULE) int (*br_handle_frame_hook)(struct net_bridge_port *p, struct sk_buff **pskb); +struct net_bridge; +struct net_bridge_fdb_entry *(*br_fdb_get_hook)(struct net_bridge *br, + unsigned char *addr); +void (*br_fdb_put_hook)(struct net_bridge_fdb_entry *ent); static __inline__ int handle_bridge(struct sk_buff **pskb, struct packet_type **pt_prev, int *ret) @@ -1630,12 +1656,9 @@ int netif_receive_skb(struct sk_buff *skb) int ret = NET_RX_DROP; unsigned short type; -#ifdef CONFIG_NETPOLL - if (skb->dev->netpoll_rx && skb->dev->poll && netpoll_rx(skb)) { - kfree_skb(skb); + /* if we've gotten here through NAPI, check netpoll */ + if (skb->dev->poll && netpoll_rx(skb)) return NET_RX_DROP; - } -#endif if (!skb->stamp.tv_sec) net_timestamp(&skb->stamp); @@ -1722,6 +1745,7 @@ static int process_backlog(struct net_device *backlog_dev, int *budget) struct softnet_data *queue = &__get_cpu_var(softnet_data); unsigned long start_time = jiffies; + backlog_dev->weight = weight_p; for (;;) { struct sk_buff *skb; struct net_device *dev; @@ -1782,8 +1806,10 @@ static void net_rx_action(struct softirq_action *h) dev = list_entry(queue->poll_list.next, struct net_device, poll_list); + netpoll_poll_lock(dev); if (dev->quota <= 0 || dev->poll(dev, &budget)) { + netpoll_poll_unlock(dev); local_irq_disable(); list_del(&dev->poll_list); list_add_tail(&dev->poll_list, &queue->poll_list); @@ -1792,6 +1818,7 @@ static void net_rx_action(struct softirq_action *h) else dev->quota = dev->weight; } else { + netpoll_poll_unlock(dev); dev_put(dev); local_irq_disable(); } @@ -2308,6 +2335,21 @@ int dev_set_mtu(struct net_device *dev, int new_mtu) return err; } +int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa) +{ + int err; + + if (!dev->set_mac_address) + return -EOPNOTSUPP; + if (sa->sa_family != dev->type) + return -EINVAL; + if (!netif_device_present(dev)) + return -ENODEV; + err = dev->set_mac_address(dev, sa); + if (!err) + notifier_call_chain(&netdev_chain, NETDEV_CHANGEADDR, dev); + return err; +} /* * Perform the SIOCxIFxxx calls. @@ -2354,17 +2396,7 @@ static int dev_ifsioc(struct ifreq *ifr, unsigned int cmd) return 0; case SIOCSIFHWADDR: - if (!dev->set_mac_address) - return -EOPNOTSUPP; - if (ifr->ifr_hwaddr.sa_family != dev->type) - return -EINVAL; - if (!netif_device_present(dev)) - return -ENODEV; - err = dev->set_mac_address(dev, &ifr->ifr_hwaddr); - if (!err) - notifier_call_chain(&netdev_chain, - NETDEV_CHANGEADDR, dev); - return err; + return dev_set_mac_address(dev, &ifr->ifr_hwaddr); case SIOCSIFHWBROADCAST: if (ifr->ifr_hwaddr.sa_family != dev->type) @@ -3080,7 +3112,7 @@ void free_netdev(struct net_device *dev) void synchronize_net(void) { might_sleep(); - synchronize_kernel(); + synchronize_rcu(); } /** @@ -3330,6 +3362,7 @@ EXPORT_SYMBOL(dev_set_allmulti); EXPORT_SYMBOL(dev_set_promiscuity); EXPORT_SYMBOL(dev_change_flags); EXPORT_SYMBOL(dev_set_mtu); +EXPORT_SYMBOL(dev_set_mac_address); EXPORT_SYMBOL(free_netdev); EXPORT_SYMBOL(netdev_boot_setup_check); EXPORT_SYMBOL(netdev_set_master); @@ -3345,9 +3378,12 @@ EXPORT_SYMBOL(unregister_netdevice); EXPORT_SYMBOL(unregister_netdevice_notifier); EXPORT_SYMBOL(net_enable_timestamp); EXPORT_SYMBOL(net_disable_timestamp); +EXPORT_SYMBOL(dev_get_flags); #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) EXPORT_SYMBOL(br_handle_frame_hook); +EXPORT_SYMBOL(br_fdb_get_hook); +EXPORT_SYMBOL(br_fdb_put_hook); #endif #ifdef CONFIG_KMOD