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Diffstat (limited to 'net/core/dev.c')
-rw-r--r--net/core/dev.c82
1 files changed, 51 insertions, 31 deletions
diff --git a/net/core/dev.c b/net/core/dev.c
index 563ddc28139d..b624fe4d9bd7 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1284,11 +1284,13 @@ static int dev_close_many(struct list_head *head)
*/
int dev_close(struct net_device *dev)
{
- LIST_HEAD(single);
+ if (dev->flags & IFF_UP) {
+ LIST_HEAD(single);
- list_add(&dev->unreg_list, &single);
- dev_close_many(&single);
- list_del(&single);
+ list_add(&dev->unreg_list, &single);
+ dev_close_many(&single);
+ list_del(&single);
+ }
return 0;
}
EXPORT_SYMBOL(dev_close);
@@ -1454,6 +1456,27 @@ 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 +1500,7 @@ 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;
@@ -2071,7 +2093,7 @@ 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)
@@ -2131,7 +2153,7 @@ 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)
@@ -2950,8 +2972,8 @@ 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)
@@ -3780,7 +3802,7 @@ 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)) {
@@ -4753,7 +4775,7 @@ static int dev_ifsioc_locked(struct net *net, struct ifreq *ifr, unsigned int cm
* is never reached
*/
WARN_ON(1);
- err = -EINVAL;
+ err = -ENOTTY;
break;
}
@@ -5021,7 +5043,7 @@ int dev_ioctl(struct net *net, unsigned int cmd, void __user *arg)
/* Set the per device memory buffer space.
* Not applicable in our case */
case SIOCSIFLINK:
- return -EINVAL;
+ return -ENOTTY;
/*
* Unknown or private ioctl.
@@ -5042,7 +5064,7 @@ int dev_ioctl(struct net *net, unsigned int cmd, void __user *arg)
/* Take care of Wireless Extensions */
if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)
return wext_handle_ioctl(net, &ifr, cmd, arg);
- return -EINVAL;
+ return -ENOTTY;
}
}
@@ -5164,33 +5186,37 @@ u32 netdev_fix_features(struct net_device *dev, u32 features)
/* Fix illegal checksum combinations */
if ((features & NETIF_F_HW_CSUM) &&
(features & (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))) {
- netdev_info(dev, "mixed HW and IP checksum settings.\n");
+ netdev_warn(dev, "mixed HW and IP checksum settings.\n");
features &= ~(NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM);
}
if ((features & NETIF_F_NO_CSUM) &&
(features & (NETIF_F_HW_CSUM|NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))) {
- netdev_info(dev, "mixed no checksumming and other settings.\n");
+ netdev_warn(dev, "mixed no checksumming and other settings.\n");
features &= ~(NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM|NETIF_F_HW_CSUM);
}
/* Fix illegal SG+CSUM combinations. */
if ((features & NETIF_F_SG) &&
!(features & NETIF_F_ALL_CSUM)) {
- netdev_info(dev,
- "Dropping NETIF_F_SG since no checksum feature.\n");
+ netdev_dbg(dev,
+ "Dropping NETIF_F_SG since no checksum feature.\n");
features &= ~NETIF_F_SG;
}
/* 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_dbg(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");
+ netdev_dbg(dev, "Dropping NETIF_F_GSO since no SG feature.\n");
features &= ~NETIF_F_GSO;
}
@@ -5200,13 +5226,13 @@ u32 netdev_fix_features(struct net_device *dev, u32 features)
if (!((features & NETIF_F_GEN_CSUM) ||
(features & (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))
== (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))) {
- netdev_info(dev,
+ netdev_dbg(dev,
"Dropping NETIF_F_UFO since no checksum offload features.\n");
features &= ~NETIF_F_UFO;
}
if (!(features & NETIF_F_SG)) {
- netdev_info(dev,
+ netdev_dbg(dev,
"Dropping NETIF_F_UFO since no NETIF_F_SG feature.\n");
features &= ~NETIF_F_UFO;
}
@@ -5388,12 +5414,6 @@ int register_netdevice(struct net_device *dev)
dev->features |= NETIF_F_SOFT_FEATURES;
dev->wanted_features = dev->features & dev->hw_features;
- /* Avoid warning from netdev_fix_features() for GSO without SG */
- if (!(dev->wanted_features & NETIF_F_SG)) {
- dev->wanted_features &= ~NETIF_F_GSO;
- dev->features &= ~NETIF_F_GSO;
- }
-
/* Enable GRO and NETIF_F_HIGHDMA for vlans by default,
* vlan_dev_init() will do the dev->features check, so these features
* are enabled only if supported by underlying device.
@@ -6316,7 +6336,7 @@ 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 v1.2.3-70-g09d2 (git 2.48.1) at 2025-03-24 01:12:04 +0000