__net_timestamp(SKB); \
} \
-bool is_skb_forwardable(struct net_device *dev, struct sk_buff *skb)
+bool is_skb_forwardable(const struct net_device *dev, const struct sk_buff *skb)
{
unsigned int len;
return ERR_PTR(err);
}
+ /* Only report GSO partial support if it will enable us to
+ * support segmentation on this frame without needing additional
+ * work.
+ */
+ if (features & NETIF_F_GSO_PARTIAL) {
+ netdev_features_t partial_features = NETIF_F_GSO_ROBUST;
+ struct net_device *dev = skb->dev;
+
+ partial_features |= dev->features & dev->gso_partial_features;
+ if (!skb_gso_ok(skb, features | partial_features))
+ features &= ~NETIF_F_GSO_PARTIAL;
+ }
+
BUILD_BUG_ON(SKB_SGO_CB_OFFSET +
sizeof(*SKB_GSO_CB(skb)) > sizeof(skb->cb));
if (skb->ip_summed != CHECKSUM_NONE &&
!can_checksum_protocol(features, type)) {
- features &= ~NETIF_F_CSUM_MASK;
+ features &= ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
} else if (illegal_highdma(skb->dev, skb)) {
features &= ~NETIF_F_SG;
}
return vlan_features_check(skb, features);
}
+static netdev_features_t gso_features_check(const struct sk_buff *skb,
+ struct net_device *dev,
+ netdev_features_t features)
+{
+ u16 gso_segs = skb_shinfo(skb)->gso_segs;
+
+ if (gso_segs > dev->gso_max_segs)
+ return features & ~NETIF_F_GSO_MASK;
+
+ /* Support for GSO partial features requires software
+ * intervention before we can actually process the packets
+ * so we need to strip support for any partial features now
+ * and we can pull them back in after we have partially
+ * segmented the frame.
+ */
+ if (!(skb_shinfo(skb)->gso_type & SKB_GSO_PARTIAL))
+ features &= ~dev->gso_partial_features;
+
+ /* Make sure to clear the IPv4 ID mangling feature if the
+ * IPv4 header has the potential to be fragmented.
+ */
+ if (skb_shinfo(skb)->gso_type & SKB_GSO_TCPV4) {
+ struct iphdr *iph = skb->encapsulation ?
+ inner_ip_hdr(skb) : ip_hdr(skb);
+
+ if (!(iph->frag_off & htons(IP_DF)))
+ features &= ~NETIF_F_TSO_MANGLEID;
+ }
+
+ return features;
+}
+
netdev_features_t netif_skb_features(struct sk_buff *skb)
{
struct net_device *dev = skb->dev;
netdev_features_t features = dev->features;
- u16 gso_segs = skb_shinfo(skb)->gso_segs;
- if (gso_segs > dev->gso_max_segs || gso_segs < dev->gso_min_segs)
- features &= ~NETIF_F_GSO_MASK;
+ if (skb_is_gso(skb))
+ features = gso_features_check(skb, dev, features);
/* If encapsulation offload request, verify we are testing
* hardware encapsulation features instead of standard
{
netdev_features_t features;
- if (skb->next)
- return skb;
-
features = netif_skb_features(skb);
skb = validate_xmit_vlan(skb, features);
if (unlikely(!skb))
out_kfree_skb:
kfree_skb(skb);
out_null:
+ atomic_long_inc(&dev->tx_dropped);
return NULL;
}
skb = validate_xmit_skb(skb, dev);
if (!skb)
- goto drop;
+ goto out;
HARD_TX_LOCK(dev, txq, cpu);
}
rc = -ENETDOWN;
-drop:
rcu_read_unlock_bh();
atomic_long_inc(&dev->tx_dropped);
EXPORT_SYMBOL(rps_cpu_mask);
struct static_key rps_needed __read_mostly;
+EXPORT_SYMBOL(rps_needed);
static struct rps_dev_flow *
set_rps_cpu(struct net_device *dev, struct sk_buff *skb,
NAPI_GRO_CB(skb)->free = 0;
NAPI_GRO_CB(skb)->encap_mark = 0;
NAPI_GRO_CB(skb)->is_fou = 0;
+ NAPI_GRO_CB(skb)->is_atomic = 1;
NAPI_GRO_CB(skb)->gro_remcsum_start = 0;
/* Setup for GRO checksum validation */
if (unlikely(skb_gro_header_hard(skb, hlen))) {
eth = skb_gro_header_slow(skb, hlen, 0);
if (unlikely(!eth)) {
+ net_warn_ratelimited("%s: dropping impossible skb from %s\n",
+ __func__, napi->dev->name);
napi_reuse_skb(napi, skb);
return NULL;
}
netpoll_poll_unlock(have);
}
if (rc > 0)
- NET_ADD_STATS_BH(sock_net(sk),
- LINUX_MIB_BUSYPOLLRXPACKETS, rc);
+ __NET_ADD_STATS(sock_net(sk),
+ LINUX_MIB_BUSYPOLLRXPACKETS, rc);
local_bh_enable();
if (rc == LL_FLUSH_FAILED)
}
}
+ /* GSO partial features require GSO partial be set */
+ if ((features & dev->gso_partial_features) &&
+ !(features & NETIF_F_GSO_PARTIAL)) {
+ netdev_dbg(dev,
+ "Dropping partially supported GSO features since no GSO partial.\n");
+ features &= ~dev->gso_partial_features;
+ }
+
#ifdef CONFIG_NET_RX_BUSY_POLL
if (dev->netdev_ops->ndo_busy_poll)
features |= NETIF_F_BUSY_POLL;
dev->features |= NETIF_F_SOFT_FEATURES;
dev->wanted_features = dev->features & dev->hw_features;
- if (!(dev->flags & IFF_LOOPBACK)) {
+ if (!(dev->flags & IFF_LOOPBACK))
dev->hw_features |= NETIF_F_NOCACHE_COPY;
- }
+
+ /* If IPv4 TCP segmentation offload is supported we should also
+ * allow the device to enable segmenting the frame with the option
+ * of ignoring a static IP ID value. This doesn't enable the
+ * feature itself but allows the user to enable it later.
+ */
+ if (dev->hw_features & NETIF_F_TSO)
+ dev->hw_features |= NETIF_F_TSO_MANGLEID;
+ if (dev->vlan_features & NETIF_F_TSO)
+ dev->vlan_features |= NETIF_F_TSO_MANGLEID;
+ if (dev->mpls_features & NETIF_F_TSO)
+ dev->mpls_features |= NETIF_F_TSO_MANGLEID;
+ if (dev->hw_enc_features & NETIF_F_TSO)
+ dev->hw_enc_features |= NETIF_F_TSO_MANGLEID;
/* Make NETIF_F_HIGHDMA inheritable to VLAN devices.
*/
/* Make NETIF_F_SG inheritable to tunnel devices.
*/
- dev->hw_enc_features |= NETIF_F_SG;
+ dev->hw_enc_features |= NETIF_F_SG | NETIF_F_GSO_PARTIAL;
/* Make NETIF_F_SG inheritable to MPLS.
*/
dev->gso_max_size = GSO_MAX_SIZE;
dev->gso_max_segs = GSO_MAX_SEGS;
- dev->gso_min_segs = 0;
INIT_LIST_HEAD(&dev->napi_list);
INIT_LIST_HEAD(&dev->unreg_list);
projects / mirror_ubuntu-bionic-kernel.git / blobdiff