diff options
| author | Pravin B Shelar <pshelar@nicira.com> | 2013-02-24 20:05:05 (GMT) |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-02-25 20:47:41 (GMT) |
| commit | 8f10098fb978c3cdd8ee7d72f7aa4330873f4544 (patch) | |
| tree | cbd52a954ee36b237b6d230088a1116ced5fdc78 /net/ipv4 | |
| parent | 8dc98eb2e8ccfbfb90348f8dc42f4a528a8a9961 (diff) | |
| download | linux-8f10098fb978c3cdd8ee7d72f7aa4330873f4544.tar.xz | |
IP_GRE: Fix GRE_CSUM case.
commit "ip_gre: allow CSUM capable devices to handle packets"
aa0e51cdda005cd37e2, broke GRE_CSUM case.
GRE_CSUM needs checksum computed for inner packet. Therefore
csum-calculation can not be offloaded if tunnel device requires
GRE_CSUM. Following patch fixes it by computing inner packet checksum
for GRE_CSUM type, for all other type of GRE devices csum is offloaded.
CC: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Acked-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/ip_gre.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c index b8bada0..4065129 100644 --- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -735,7 +735,7 @@ drop: return 0; } -static struct sk_buff *handle_offloads(struct sk_buff *skb) +static struct sk_buff *handle_offloads(struct ip_tunnel *tunnel, struct sk_buff *skb) { int err; @@ -745,8 +745,12 @@ static struct sk_buff *handle_offloads(struct sk_buff *skb) goto error; skb_shinfo(skb)->gso_type |= SKB_GSO_GRE; return skb; - } - if (skb->ip_summed != CHECKSUM_PARTIAL) + } else if (skb->ip_summed == CHECKSUM_PARTIAL && + tunnel->parms.o_flags&GRE_CSUM) { + err = skb_checksum_help(skb); + if (unlikely(err)) + goto error; + } else if (skb->ip_summed != CHECKSUM_PARTIAL) skb->ip_summed = CHECKSUM_NONE; return skb; @@ -776,7 +780,7 @@ static netdev_tx_t ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev int err; int pkt_len; - skb = handle_offloads(skb); + skb = handle_offloads(tunnel, skb); if (IS_ERR(skb)) { dev->stats.tx_dropped++; return NETDEV_TX_OK; |