[NET]: Merge TSO/UFO fields in sk_buff

Having separate fields in sk_buff for TSO/UFO (tso_size/ufo_size) is not
going to scale if we add any more segmentation methods (e.g., DCCP).  So
let's merge them.

They were used to tell the protocol of a packet.  This function has been
subsumed by the new gso_type field.  This is essentially a set of netdev
feature bits (shifted by 16 bits) that are required to process a specific
skb.  As such it's easy to tell whether a given device can process a GSO
skb: you just have to and the gso_type field and the netdev's features
field.

I've made gso_type a conjunction.  The idea is that you have a base type
(e.g., SKB_GSO_TCPV4) that can be modified further to support new features.
For example, if we add a hardware TSO type that supports ECN, they would
declare NETIF_F_TSO | NETIF_F_TSO_ECN.  All TSO packets with CWR set would
have a gso_type of SKB_GSO_TCPV4 | SKB_GSO_TCPV4_ECN while all other TSO
packets would be SKB_GSO_TCPV4.  This means that only the CWR packets need
to be emulated in software.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/net/bnx2.c b/drivers/net/bnx2.c
index 702d546567ad..7635736cc791 100644
--- a/drivers/net/bnx2.c
+++ b/drivers/net/bnx2.c
@@ -1640,7 +1640,7 @@ bnx2_tx_int(struct bnx2 *bp)
                 skb = tx_buf->skb;
 #ifdef BCM_TSO 
                 /* partial BD completions possible with TSO packets */
-                if (skb_shinfo(skb)->tso_size) {
+                if (skb_shinfo(skb)->gso_size) {
                         u16 last_idx, last_ring_idx;
 
                         last_idx = sw_cons +
@@ -4428,7 +4428,7 @@ bnx2_start_xmit(struct sk_buff *skb, struct net_device *dev)
                         (TX_BD_FLAGS_VLAN_TAG | (vlan_tx_tag_get(skb) << 16));
         }
 #ifdef BCM_TSO 
-        if ((mss = skb_shinfo(skb)->tso_size) &&
+        if ((mss = skb_shinfo(skb)->gso_size) &&
                 (skb->len > (bp->dev->mtu + ETH_HLEN))) {
                 u32 tcp_opt_len, ip_tcp_len;