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ibmveth: calculate gso_segs for large packets

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Include calculations to compute the number of segments
that comprise an aggregated large packet.

Signed-off-by: Thomas Falcon <tlfalcon@linux.vnet.ibm.com>
Reviewed-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Reviewed-by: Jonathan Maxwell <jmaxwell37@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Thomas Falcon 2016-12-13 18:15:09 -06:00 committed by David S. Miller
parent 026acd5f47
commit 94acf164dc
1 changed files with 10 additions and 2 deletions
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12
drivers/net/ethernet/ibm/ibmveth.c
View file

@ -1181,7 +1181,9 @@ static netdev_tx_t ibmveth_start_xmit(struct sk_buff *skb,
static void ibmveth_rx_mss_helper(struct sk_buff *skb, u16 mss, int lrg_pkt)
{
struct tcphdr *tcph;
int offset = 0;
int hdr_len;
/* only TCP packets will be aggregated */
if (skb->protocol == htons(ETH_P_IP)) {
@ -1208,14 +1210,20 @@ static void ibmveth_rx_mss_helper(struct sk_buff *skb, u16 mss, int lrg_pkt)
/* if mss is not set through Large Packet bit/mss in rx buffer,
* expect that the mss will be written to the tcp header checksum.
*/
tcph = (struct tcphdr *)(skb->data + offset);
if (lrg_pkt) {
skb_shinfo(skb)->gso_size = mss;
} else if (offset) {
struct tcphdr *tcph = (struct tcphdr *)(skb->data + offset);
skb_shinfo(skb)->gso_size = ntohs(tcph->check);
tcph->check = 0;
}
if (skb_shinfo(skb)->gso_size) {
hdr_len = offset + tcph->doff * 4;
skb_shinfo(skb)->gso_segs =
DIV_ROUND_UP(skb->len - hdr_len,
skb_shinfo(skb)->gso_size);
}
}
static int ibmveth_poll(struct napi_struct *napi, int budget)