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Commit 94acf164 authored by Thomas Falcon's avatar Thomas Falcon Committed by David S. Miller
Browse files

ibmveth: calculate gso_segs for large packets 



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

Signed-off-by: default avatarThomas Falcon <tlfalcon@linux.vnet.ibm.com>
Reviewed-by: default avatarMarcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Reviewed-by: default avatarJonathan Maxwell <jmaxwell37@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 026acd5f

drivers/net/ethernet/ibm/ibmveth.c

+10 −2
Original line number Diff line number Diff line
@@ -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)