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Diffstat (limited to 'net/core/dev.c')
-rw-r--r--net/core/dev.c120
1 files changed, 47 insertions, 73 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index 0b88eba97dab..c2ac599fa0f6 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);
@@ -1353,14 +1304,17 @@ 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);
@@ -1368,11 +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
@@ -1474,6 +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);
@@ -1504,6 +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
*
@@ -1527,8 +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;
@@ -2121,7 +2091,7 @@ int dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev,
u32 features;
/*
- * If device doesnt need skb->dst, release it right now while
+ * If device doesn't need skb->dst, release it right now while
* its hot in this cpu cache
*/
if (dev->priv_flags & IFF_XMIT_DST_RELEASE)
@@ -2181,7 +2151,7 @@ gso:
nskb->next = NULL;
/*
- * If device doesnt need nskb->dst, release it right now while
+ * If device doesn't need nskb->dst, release it right now while
* its hot in this cpu cache
*/
if (dev->priv_flags & IFF_XMIT_DST_RELEASE)
@@ -3000,8 +2970,8 @@ EXPORT_SYMBOL_GPL(br_fdb_test_addr_hook);
* when CONFIG_NET_CLS_ACT is? otherwise some useless instructions
* a compare and 2 stores extra right now if we dont have it on
* but have CONFIG_NET_CLS_ACT
- * NOTE: This doesnt stop any functionality; if you dont have
- * the ingress scheduler, you just cant add policies on ingress.
+ * NOTE: This doesn't stop any functionality; if you dont have
+ * the ingress scheduler, you just can't add policies on ingress.
*
*/
static int ing_filter(struct sk_buff *skb, struct netdev_queue *rxq)
@@ -3830,7 +3800,7 @@ static void net_rx_action(struct softirq_action *h)
* with netpoll's poll_napi(). Only the entity which
* obtains the lock and sees NAPI_STATE_SCHED set will
* actually make the ->poll() call. Therefore we avoid
- * accidently calling ->poll() when NAPI is not scheduled.
+ * accidentally calling ->poll() when NAPI is not scheduled.
*/
work = 0;
if (test_bit(NAPI_STATE_SCHED, &n->state)) {
@@ -5233,11 +5203,15 @@ u32 netdev_fix_features(struct net_device *dev, u32 features)
}
/* TSO requires that SG is present as well. */
- if ((features & NETIF_F_TSO) && !(features & NETIF_F_SG)) {
- netdev_info(dev, "Dropping NETIF_F_TSO since no SG feature.\n");
- features &= ~NETIF_F_TSO;
+ if ((features & NETIF_F_ALL_TSO) && !(features & NETIF_F_SG)) {
+ netdev_info(dev, "Dropping TSO features since no SG feature.\n");
+ features &= ~NETIF_F_ALL_TSO;
}
+ /* TSO ECN requires that TSO is present as well. */
+ if ((features & NETIF_F_ALL_TSO) == NETIF_F_TSO_ECN)
+ features &= ~NETIF_F_TSO_ECN;
+
/* Software GSO depends on SG. */
if ((features & NETIF_F_GSO) && !(features & NETIF_F_SG)) {
netdev_info(dev, "Dropping NETIF_F_GSO since no SG feature.\n");
@@ -6366,7 +6340,7 @@ static void __net_exit default_device_exit(struct net *net)
if (dev->rtnl_link_ops)
continue;
- /* Push remaing network devices to init_net */
+ /* Push remaining network devices to init_net */
snprintf(fb_name, IFNAMSIZ, "dev%d", dev->ifindex);
err = dev_change_net_namespace(dev, &init_net, fb_name);
if (err) {
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-28 05:48:59 +0300