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[NET]: Merge TSO/UFO fields in sk_buff

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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>
This commit is contained in:
Herbert Xu
2006-06-22 02:40:14 -07:00
committed by David S. Miller
parent d4828d85d1
commit 7967168cef
27 changed files with 120 additions and 90 deletions
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4
drivers/s390/net/qeth_main.c
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@@ -4417,7 +4417,7 @@ qeth_send_packet(struct qeth_card *card, struct sk_buff *skb)
struct qeth_eddp_context *ctx = NULL;
int tx_bytes = skb->len;
unsigned short nr_frags = skb_shinfo(skb)->nr_frags;
unsigned short tso_size = skb_shinfo(skb)->tso_size;
unsigned short tso_size = skb_shinfo(skb)->gso_size;
int rc;
QETH_DBF_TEXT(trace, 6, "sendpkt");
@@ -4453,7 +4453,7 @@ qeth_send_packet(struct qeth_card *card, struct sk_buff *skb)
queue = card->qdio.out_qs
[qeth_get_priority_queue(card, skb, ipv, cast_type)];
if (skb_shinfo(skb)->tso_size)
if (skb_shinfo(skb)->gso_size)
large_send = card->options.large_send;
/*are we able to do TSO ? If so ,prepare and send it from here */