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authorYuval Mintz <yuvalmin@broadcom.com>2013-04-24 01:44:58 +0000
committerDavid S. Miller <davem@davemloft.net>2013-04-24 16:33:53 -0400
commit2c2d06d5126e62e90aee71da9b85c9d95de6bbe2 (patch)
tree15343681c0cd5282d6c72b9b0a47cd09ed9726dd
parent0996076973856e093c84ed870501fb9d5c72f8a3 (diff)
bnx2x: prevent GRO false checksum claims
This patch introduces a more robust error handling flow in case of incorrect behaviour by the FW when passing on GRO aggregations. Although this should never happen (i.e., this is merely a theoretical fix), if the bnx2x driver was to receive a GRO from FW with protocol other than IPv4/IPv6, the driver would falsely claim to have performed partial checksum and set various incorrect fields in the skb header. Current behaviour of the bnx2x driver (i.e., print an error) is insufficient. This patch remedies this by simply preventing the false claims. Signed-off-by: Yuval Mintz <yuvalmin@broadcom.com> Signed-off-by: Ariel Elior <ariele@broadcom.com> Signed-off-by: Eilon Greenstein <eilong@broadcom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c16
1 files changed, 11 insertions, 5 deletions
diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c
index d72bd8c40aa1..5a815ce7dee0 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c
@@ -642,6 +642,14 @@ static void bnx2x_gro_ipv6_csum(struct bnx2x *bp, struct sk_buff *skb)
th->check = ~tcp_v6_check(skb->len - skb_transport_offset(skb),
&iph->saddr, &iph->daddr, 0);
}
+
+static void bnx2x_gro_csum(struct bnx2x *bp, struct sk_buff *skb,
+ void (*gro_func)(struct bnx2x*, struct sk_buff*))
+{
+ skb_set_network_header(skb, 0);
+ gro_func(bp, skb);
+ tcp_gro_complete(skb);
+}
#endif
static void bnx2x_gro_receive(struct bnx2x *bp, struct bnx2x_fastpath *fp,
@@ -649,19 +657,17 @@ static void bnx2x_gro_receive(struct bnx2x *bp, struct bnx2x_fastpath *fp,
{
#ifdef CONFIG_INET
if (skb_shinfo(skb)->gso_size) {
- skb_set_network_header(skb, 0);
switch (be16_to_cpu(skb->protocol)) {
case ETH_P_IP:
- bnx2x_gro_ip_csum(bp, skb);
+ bnx2x_gro_csum(bp, skb, bnx2x_gro_ip_csum);
break;
case ETH_P_IPV6:
- bnx2x_gro_ipv6_csum(bp, skb);
+ bnx2x_gro_csum(bp, skb, bnx2x_gro_ipv6_csum);
break;
default:
- BNX2X_ERR("FW GRO supports only IPv4/IPv6, not 0x%04x\n",
+ BNX2X_ERR("Error: FW GRO supports only IPv4/IPv6, not 0x%04x\n",
be16_to_cpu(skb->protocol));
}
- tcp_gro_complete(skb);
}
#endif
napi_gro_receive(&fp->napi, skb);