From: Edward Cree <ecree@solarflare•com>
To: David Miller <davem@davemloft•net>
Cc: <netdev@vger•kernel.org>, <linux-net-drivers@solarflare•com>,
<tom@herbertland•com>, <alexander.duyck@gmail•com>
Subject: [PATCH net-next 6/8] net: gre: Implement LCO for GRE over IPv4
Date: Fri, 5 Feb 2016 20:42:45 +0000 [thread overview]
Message-ID: <56B50945.40109@solarflare.com> (raw)
In-Reply-To: <56B50886.1050201@solarflare.com>
Signed-off-by: Edward Cree <ecree@solarflare•com>
---
net/ipv4/ip_gre.c | 16 +++++++++++++---
1 file changed, 13 insertions(+), 3 deletions(-)
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index 7c51c4e..9b31532 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -440,6 +440,17 @@ drop:
return 0;
}
+static __sum16 gre_checksum(struct sk_buff *skb)
+{
+ __wsum csum;
+
+ if (skb->ip_summed == CHECKSUM_PARTIAL)
+ csum = lco_csum(skb);
+ else
+ csum = skb_checksum(skb, 0, skb->len, 0);
+ return csum_fold(csum);
+}
+
static void build_header(struct sk_buff *skb, int hdr_len, __be16 flags,
__be16 proto, __be32 key, __be32 seq)
{
@@ -467,8 +478,7 @@ static void build_header(struct sk_buff *skb, int hdr_len, __be16 flags,
!(skb_shinfo(skb)->gso_type &
(SKB_GSO_GRE | SKB_GSO_GRE_CSUM))) {
*ptr = 0;
- *(__sum16 *)ptr = csum_fold(skb_checksum(skb, 0,
- skb->len, 0));
+ *(__sum16 *)ptr = gre_checksum(skb);
}
}
}
@@ -493,7 +503,7 @@ static void __gre_xmit(struct sk_buff *skb, struct net_device *dev,
static struct sk_buff *gre_handle_offloads(struct sk_buff *skb,
bool csum)
{
- return iptunnel_handle_offloads(skb, csum,
+ return iptunnel_handle_offloads(skb, false,
csum ? SKB_GSO_GRE_CSUM : SKB_GSO_GRE);
}
next prev parent reply other threads:[~2016-02-05 20:42 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-05 20:39 [PATCH v4 net-next 0/8] Local Checksum Offload Edward Cree
2016-02-05 20:40 ` [PATCH net-next 1/8] net: local checksum offload for encapsulation Edward Cree
2016-02-05 20:41 ` [PATCH net-next 2/8] net: udp: always set up for CHECKSUM_PARTIAL offload Edward Cree
2016-02-05 20:41 ` [PATCH net-next 3/8] net: enable LCO for udp_tunnel_handle_offloads() users Edward Cree
2016-02-05 20:42 ` [PATCH net-next 4/8] net: vxlan: enable local checksum offload Edward Cree
2016-02-05 20:42 ` [PATCH net-next 5/8] fou: enable LCO in FOU and GUE Edward Cree
2016-02-05 20:42 ` Edward Cree [this message]
2016-02-05 20:42 ` [PATCH net-next 7/8] net: ip_tunnel: remove 'csum_help' argument to iptunnel_handle_offloads Edward Cree
2016-02-05 20:43 ` [PATCH net-next 8/8] Documentation/networking: add checksum-offloads.txt to explain LCO Edward Cree
2016-02-11 12:29 ` [PATCH v4 net-next 0/8] Local Checksum Offload David Miller
-- strict thread matches above, loose matches on Subject: below --
2016-01-08 19:44 [PATCH v3 " Edward Cree
2016-01-08 19:47 ` [PATCH net-next 6/8] net: gre: Implement LCO for GRE over IPv4 Edward Cree
2016-01-11 10:09 ` David Laight
2016-01-11 13:21 ` Edward Cree
2016-01-11 18:39 ` Alexander Duyck
2016-01-11 19:02 ` Edward Cree
2016-01-20 19:11 ` Rustad, Mark D
2016-01-20 19:35 ` Alexander Duyck
2016-01-20 19:58 ` Tom Herbert
2016-01-20 21:13 ` Alexander Duyck
2016-01-20 23:34 ` Rustad, Mark D
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