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| author | Thomas Falcon <tlfalcon@linux.vnet.ibm.com> | 2016-12-13 18:15:09 -0600 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-12-17 10:23:28 -0500 |
| commit | 94acf164dc8f1184e8d0737be7125134c2701dbe (patch) | |
| tree | ada87fda86154b8f2ecf110d8fe5918d8abeedb2 | |
| parent | 026acd5f47340382844f0af73516cf7ae6cdc876 (diff) | |
| download | linux-94acf164dc8f1184e8d0737be7125134c2701dbe.tar.bz2 | |
ibmveth: calculate gso_segs for large packets
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>
| -rw-r--r-- | drivers/net/ethernet/ibm/ibmveth.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/net/ethernet/ibm/ibmveth.c b/drivers/net/ethernet/ibm/ibmveth.c index fbece63395a8..a831f947ca8c 100644 --- a/drivers/net/ethernet/ibm/ibmveth.c +++ b/drivers/net/ethernet/ibm/ibmveth.c @@ -1181,7 +1181,9 @@ map_failed: 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) |