From 27660515a21bf913e3208ded3f27abd0529fae0e Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Micha=C5=82=20Miros=C5=82aw?= Date: Fri, 18 Mar 2011 16:56:34 +0000 Subject: net: implement dev_disable_lro() hw_features compatibility MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Implement compatibility with new hw_features for dev_disable_lro(). This is a transition path - dev_disable_lro() should be later integrated into netdev_fix_features() after all drivers are converted. Signed-off-by: Michał Mirosław Signed-off-by: David S. Miller --- net/core/dev.c | 19 +++++++++++-------- 1 file changed, 11 insertions(+), 8 deletions(-) (limited to 'net/core/dev.c') diff --git a/net/core/dev.c b/net/core/dev.c index 0b88eba97dab..f453370131a0 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -1353,14 +1353,17 @@ EXPORT_SYMBOL(dev_close); */ void dev_disable_lro(struct net_device *dev) { - if (dev->ethtool_ops && dev->ethtool_ops->get_flags && - dev->ethtool_ops->set_flags) { - u32 flags = dev->ethtool_ops->get_flags(dev); - if (flags & ETH_FLAG_LRO) { - flags &= ~ETH_FLAG_LRO; - dev->ethtool_ops->set_flags(dev, flags); - } - } + u32 flags; + + if (dev->ethtool_ops && dev->ethtool_ops->get_flags) + flags = dev->ethtool_ops->get_flags(dev); + else + flags = ethtool_op_get_flags(dev); + + if (!(flags & ETH_FLAG_LRO)) + return; + + __ethtool_set_flags(dev, flags & ~ETH_FLAG_LRO); WARN_ON(dev->features & NETIF_F_LRO); } EXPORT_SYMBOL(dev_disable_lro); -- cgit v1.2.2 From 3b261ade4224852ed841ecfd13876db812846e96 Mon Sep 17 00:00:00 2001 From: Amerigo Wang Date: Tue, 22 Mar 2011 01:59:47 +0000 Subject: net: remove useless comments in net/core/dev.c The code itself can explain what it is doing, no need these comments. Signed-off-by: WANG Cong Signed-off-by: David S. Miller --- net/core/dev.c | 54 ------------------------------------------------------ 1 file changed, 54 deletions(-) (limited to 'net/core/dev.c') diff --git a/net/core/dev.c b/net/core/dev.c index f453370131a0..9b23dcefae6c 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -1140,9 +1140,6 @@ static int __dev_open(struct net_device *dev) ASSERT_RTNL(); - /* - * Is it even present? - */ if (!netif_device_present(dev)) return -ENODEV; @@ -1151,9 +1148,6 @@ static int __dev_open(struct net_device *dev) if (ret) return ret; - /* - * Call device private open method - */ set_bit(__LINK_STATE_START, &dev->state); if (ops->ndo_validate_addr) @@ -1162,31 +1156,12 @@ static int __dev_open(struct net_device *dev) if (!ret && ops->ndo_open) ret = ops->ndo_open(dev); - /* - * If it went open OK then: - */ - if (ret) clear_bit(__LINK_STATE_START, &dev->state); else { - /* - * Set the flags. - */ dev->flags |= IFF_UP; - - /* - * Enable NET_DMA - */ net_dmaengine_get(); - - /* - * Initialize multicasting status - */ dev_set_rx_mode(dev); - - /* - * Wakeup transmit queue engine - */ dev_activate(dev); } @@ -1209,22 +1184,13 @@ int dev_open(struct net_device *dev) { int ret; - /* - * Is it already up? - */ if (dev->flags & IFF_UP) return 0; - /* - * Open device - */ ret = __dev_open(dev); if (ret < 0) return ret; - /* - * ... and announce new interface. - */ rtmsg_ifinfo(RTM_NEWLINK, dev, IFF_UP|IFF_RUNNING); call_netdevice_notifiers(NETDEV_UP, dev); @@ -1240,10 +1206,6 @@ static int __dev_close_many(struct list_head *head) might_sleep(); list_for_each_entry(dev, head, unreg_list) { - /* - * Tell people we are going down, so that they can - * prepare to death, when device is still operating. - */ call_netdevice_notifiers(NETDEV_GOING_DOWN, dev); clear_bit(__LINK_STATE_START, &dev->state); @@ -1272,15 +1234,7 @@ static int __dev_close_many(struct list_head *head) if (ops->ndo_stop) ops->ndo_stop(dev); - /* - * Device is now down. - */ - dev->flags &= ~IFF_UP; - - /* - * Shutdown NET_DMA - */ net_dmaengine_put(); } @@ -1309,9 +1263,6 @@ static int dev_close_many(struct list_head *head) __dev_close_many(head); - /* - * Tell people we are down - */ list_for_each_entry(dev, head, unreg_list) { rtmsg_ifinfo(RTM_NEWLINK, dev, IFF_UP|IFF_RUNNING); call_netdevice_notifiers(NETDEV_DOWN, dev); @@ -1371,11 +1322,6 @@ EXPORT_SYMBOL(dev_disable_lro); static int dev_boot_phase = 1; -/* - * Device change register/unregister. These are not inline or static - * as we export them to the world. - */ - /** * register_netdevice_notifier - register a network notifier block * @nb: notifier -- cgit v1.2.2 From edf947f10074fea27fdb1730524dca59355a1c40 Mon Sep 17 00:00:00 2001 From: stephen hemminger Date: Thu, 24 Mar 2011 13:24:01 +0000 Subject: bridge: notify applications if address of bridge device changes The mac address of the bridge device may be changed when a new interface is added to the bridge. If this happens, then the bridge needs to call the network notifiers to tickle any other systems that care. Since bridge can be a module, this also means exporting the notifier function. Signed-off-by: Stephen Hemminger Signed-off-by: David S. Miller --- net/core/dev.c | 1 + 1 file changed, 1 insertion(+) (limited to 'net/core/dev.c') diff --git a/net/core/dev.c b/net/core/dev.c index 9b23dcefae6c..563ddc28139d 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -1423,6 +1423,7 @@ int call_netdevice_notifiers(unsigned long val, struct net_device *dev) ASSERT_RTNL(); return raw_notifier_call_chain(&netdev_chain, val, dev); } +EXPORT_SYMBOL(call_netdevice_notifiers); /* When > 0 there are consumers of rx skb time stamps */ static atomic_t netstamp_needed = ATOMIC_INIT(0); -- cgit v1.2.2 From 79b569f0ec53a14c4d71e79d93a8676d9a0fda6d Mon Sep 17 00:00:00 2001 From: Daniel Lezcano Date: Wed, 30 Mar 2011 02:42:17 -0700 Subject: netdev: fix mtu check when TSO is enabled In case the device where is coming from the packet has TSO enabled, we should not check the mtu size value as this one could be bigger than the expected value. This is the case for the macvlan driver when the lower device has TSO enabled. The macvlan inherit this feature and forward the packets without fragmenting them. Then the packets go through dev_forward_skb and are dropped. This patch fix this by checking TSO is not enabled when we want to check the mtu size. Signed-off-by: Daniel Lezcano Acked-by: "Eric W. Biederman" Signed-off-by: David S. Miller --- net/core/dev.c | 24 ++++++++++++++++++++++-- 1 file changed, 22 insertions(+), 2 deletions(-) (limited to 'net/core/dev.c') diff --git a/net/core/dev.c b/net/core/dev.c index 563ddc28139d..3da9fb06d47a 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -1454,6 +1454,27 @@ static inline void net_timestamp_check(struct sk_buff *skb) __net_timestamp(skb); } +static inline bool is_skb_forwardable(struct net_device *dev, + struct sk_buff *skb) +{ + unsigned int len; + + if (!(dev->flags & IFF_UP)) + return false; + + len = dev->mtu + dev->hard_header_len + VLAN_HLEN; + if (skb->len <= len) + return true; + + /* if TSO is enabled, we don't care about the length as the packet + * could be forwarded without being segmented before + */ + if (skb_is_gso(skb)) + return true; + + return false; +} + /** * dev_forward_skb - loopback an skb to another netif * @@ -1477,8 +1498,7 @@ int dev_forward_skb(struct net_device *dev, struct sk_buff *skb) skb_orphan(skb); nf_reset(skb); - if (unlikely(!(dev->flags & IFF_UP) || - (skb->len > (dev->mtu + dev->hard_header_len + VLAN_HLEN)))) { + if (unlikely(!is_skb_forwardable(dev, skb))) { atomic_long_inc(&dev->rx_dropped); kfree_skb(skb); return NET_RX_DROP; -- cgit v1.2.2