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-rw-r--r--net/bridge/br_device.c4
-rw-r--r--net/bridge/br_if.c3
-rw-r--r--net/core/dev.c33
-rw-r--r--net/core/skbuff.c5
-rw-r--r--net/ipv4/af_inet.c6
-rw-r--r--net/ipv4/tcp.c8
6 files changed, 40 insertions, 19 deletions
diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c
index 2afdc7c0736c..f8dbcee80eba 100644
--- a/net/bridge/br_device.c
+++ b/net/bridge/br_device.c
@@ -184,6 +184,6 @@ void br_dev_setup(struct net_device *dev)
dev->set_mac_address = br_set_mac_address;
dev->priv_flags = IFF_EBRIDGE;
- dev->features = NETIF_F_SG | NETIF_F_FRAGLIST
- | NETIF_F_HIGHDMA | NETIF_F_TSO | NETIF_F_NO_CSUM;
+ dev->features = NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA |
+ NETIF_F_TSO | NETIF_F_NO_CSUM | NETIF_F_GSO_ROBUST;
}
diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index 07956ecf545e..f55ef682ef84 100644
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
@@ -392,7 +392,8 @@ void br_features_recompute(struct net_bridge *br)
features &= feature;
}
- br->dev->features = features | checksum | NETIF_F_LLTX;
+ br->dev->features = features | checksum | NETIF_F_LLTX |
+ NETIF_F_GSO_ROBUST;
}
/* called with RTNL */
diff --git a/net/core/dev.c b/net/core/dev.c
index f1c52cbd6ef7..4f2014994a84 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1190,11 +1190,14 @@ out:
/**
* skb_gso_segment - Perform segmentation on skb.
* @skb: buffer to segment
- * @sg: whether scatter-gather is supported on the target.
+ * @features: features for the output path (see dev->features)
*
* This function segments the given skb and returns a list of segments.
+ *
+ * It may return NULL if the skb requires no segmentation. This is
+ * only possible when GSO is used for verifying header integrity.
*/
-struct sk_buff *skb_gso_segment(struct sk_buff *skb, int sg)
+struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features)
{
struct sk_buff *segs = ERR_PTR(-EPROTONOSUPPORT);
struct packet_type *ptype;
@@ -1210,12 +1213,14 @@ struct sk_buff *skb_gso_segment(struct sk_buff *skb, int sg)
rcu_read_lock();
list_for_each_entry_rcu(ptype, &ptype_base[ntohs(type) & 15], list) {
if (ptype->type == type && !ptype->dev && ptype->gso_segment) {
- segs = ptype->gso_segment(skb, sg);
+ segs = ptype->gso_segment(skb, features);
break;
}
}
rcu_read_unlock();
+ __skb_push(skb, skb->data - skb->mac.raw);
+
return segs;
}
@@ -1291,9 +1296,15 @@ static int dev_gso_segment(struct sk_buff *skb)
{
struct net_device *dev = skb->dev;
struct sk_buff *segs;
+ int features = dev->features & ~(illegal_highdma(dev, skb) ?
+ NETIF_F_SG : 0);
+
+ segs = skb_gso_segment(skb, features);
+
+ /* Verifying header integrity only. */
+ if (!segs)
+ return 0;
- segs = skb_gso_segment(skb, dev->features & NETIF_F_SG &&
- !illegal_highdma(dev, skb));
if (unlikely(IS_ERR(segs)))
return PTR_ERR(segs);
@@ -1310,13 +1321,17 @@ int dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev)
if (netdev_nit)
dev_queue_xmit_nit(skb, dev);
- if (!netif_needs_gso(dev, skb))
- return dev->hard_start_xmit(skb, dev);
+ if (netif_needs_gso(dev, skb)) {
+ if (unlikely(dev_gso_segment(skb)))
+ goto out_kfree_skb;
+ if (skb->next)
+ goto gso;
+ }
- if (unlikely(dev_gso_segment(skb)))
- goto out_kfree_skb;
+ return dev->hard_start_xmit(skb, dev);
}
+gso:
do {
struct sk_buff *nskb = skb->next;
int rc;
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 6edbb90cbcec..dfef9eece83e 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -1848,13 +1848,13 @@ EXPORT_SYMBOL_GPL(skb_pull_rcsum);
/**
* skb_segment - Perform protocol segmentation on skb.
* @skb: buffer to segment
- * @sg: whether scatter-gather can be used for generated segments
+ * @features: features for the output path (see dev->features)
*
* This function performs segmentation on the given skb. It returns
* the segment at the given position. It returns NULL if there are
* no more segments to generate, or when an error is encountered.
*/
-struct sk_buff *skb_segment(struct sk_buff *skb, int sg)
+struct sk_buff *skb_segment(struct sk_buff *skb, int features)
{
struct sk_buff *segs = NULL;
struct sk_buff *tail = NULL;
@@ -1863,6 +1863,7 @@ struct sk_buff *skb_segment(struct sk_buff *skb, int sg)
unsigned int offset = doffset;
unsigned int headroom;
unsigned int len;
+ int sg = features & NETIF_F_SG;
int nfrags = skb_shinfo(skb)->nr_frags;
int err = -ENOMEM;
int i = 0;
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 461216b47948..8d157157bf8e 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -1097,7 +1097,7 @@ int inet_sk_rebuild_header(struct sock *sk)
EXPORT_SYMBOL(inet_sk_rebuild_header);
-static struct sk_buff *inet_gso_segment(struct sk_buff *skb, int sg)
+static struct sk_buff *inet_gso_segment(struct sk_buff *skb, int features)
{
struct sk_buff *segs = ERR_PTR(-EINVAL);
struct iphdr *iph;
@@ -1126,10 +1126,10 @@ static struct sk_buff *inet_gso_segment(struct sk_buff *skb, int sg)
rcu_read_lock();
ops = rcu_dereference(inet_protos[proto]);
if (ops && ops->gso_segment)
- segs = ops->gso_segment(skb, sg);
+ segs = ops->gso_segment(skb, features);
rcu_read_unlock();
- if (IS_ERR(segs))
+ if (!segs || unlikely(IS_ERR(segs)))
goto out;
skb = segs;
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index c04176be7ed1..0336422c88a0 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2145,7 +2145,7 @@ int compat_tcp_getsockopt(struct sock *sk, int level, int optname,
EXPORT_SYMBOL(compat_tcp_getsockopt);
#endif
-struct sk_buff *tcp_tso_segment(struct sk_buff *skb, int sg)
+struct sk_buff *tcp_tso_segment(struct sk_buff *skb, int features)
{
struct sk_buff *segs = ERR_PTR(-EINVAL);
struct tcphdr *th;
@@ -2166,10 +2166,14 @@ struct sk_buff *tcp_tso_segment(struct sk_buff *skb, int sg)
if (!pskb_may_pull(skb, thlen))
goto out;
+ segs = NULL;
+ if (skb_gso_ok(skb, features | NETIF_F_GSO_ROBUST))
+ goto out;
+
oldlen = (u16)~skb->len;
__skb_pull(skb, thlen);
- segs = skb_segment(skb, sg);
+ segs = skb_segment(skb, features);
if (IS_ERR(segs))
goto out;