From: Xin Long <lucien.xin@gmail.com>
To: netdev@vger.kernel.org
Cc: Steffen Klassert <steffen.klassert@secunet.com>,
Herbert Xu <herbert@gondor.apana.org.au>,
"David S. Miller" <davem@davemloft.net>,
Florian Westphal <fw@strlen.de>,
Sabrina Dubroca <sd@queasysnail.net>
Subject: [PATCH ipsec-next 1/3] esp4: add gso_segment for esp4 beet mode
Date: Thu, 26 Mar 2020 17:02:29 +0800 [thread overview]
Message-ID: <0baafba3ed70c5e04d437faf83f2c40f57f52540.1585213292.git.lucien.xin@gmail.com> (raw)
In-Reply-To: <cover.1585213292.git.lucien.xin@gmail.com>
In-Reply-To: <cover.1585213292.git.lucien.xin@gmail.com>
Similar to xfrm4_tunnel/transport_gso_segment(), _gso_segment()
is added to do gso_segment for esp4 beet mode. Before calling
inet_offloads[proto]->callbacks.gso_segment, it needs to do:
- Get the upper proto from ph header to get its gso_segment
when xo->proto is IPPROTO_BEETPH.
- Add SKB_GSO_TCPV4 to gso_type if x->sel.family == AF_INET6
and the proto == IPPROTO_TCP, so that the current tcp ipv4
packet can be segmented.
- Calculate a right value for skb->transport_header and move
skb->data to the transport header position.
Signed-off-by: Xin Long <lucien.xin@gmail.com>
---
net/ipv4/esp4_offload.c | 32 ++++++++++++++++++++++++++++++++
1 file changed, 32 insertions(+)
diff --git a/net/ipv4/esp4_offload.c b/net/ipv4/esp4_offload.c
index e2e219c..731022c 100644
--- a/net/ipv4/esp4_offload.c
+++ b/net/ipv4/esp4_offload.c
@@ -132,6 +132,36 @@ static struct sk_buff *xfrm4_transport_gso_segment(struct xfrm_state *x,
return segs;
}
+static struct sk_buff *xfrm4_beet_gso_segment(struct xfrm_state *x,
+ struct sk_buff *skb,
+ netdev_features_t features)
+{
+ struct xfrm_offload *xo = xfrm_offload(skb);
+ struct sk_buff *segs = ERR_PTR(-EINVAL);
+ const struct net_offload *ops;
+ int proto = xo->proto;
+
+ skb->transport_header += x->props.header_len;
+
+ if (proto == IPPROTO_BEETPH) {
+ struct ip_beet_phdr *ph = (struct ip_beet_phdr *)skb->data;
+
+ skb->transport_header += ph->hdrlen * 8;
+ proto = ph->nexthdr;
+ } else if (x->sel.family != AF_INET6) {
+ skb->transport_header -= IPV4_BEET_PHMAXLEN;
+ } else if (proto == IPPROTO_TCP) {
+ skb_shinfo(skb)->gso_type |= SKB_GSO_TCPV4;
+ }
+
+ __skb_pull(skb, skb_transport_offset(skb));
+ ops = rcu_dereference(inet_offloads[proto]);
+ if (likely(ops && ops->callbacks.gso_segment))
+ segs = ops->callbacks.gso_segment(skb, features);
+
+ return segs;
+}
+
static struct sk_buff *xfrm4_outer_mode_gso_segment(struct xfrm_state *x,
struct sk_buff *skb,
netdev_features_t features)
@@ -141,6 +171,8 @@ static struct sk_buff *xfrm4_outer_mode_gso_segment(struct xfrm_state *x,
return xfrm4_tunnel_gso_segment(x, skb, features);
case XFRM_MODE_TRANSPORT:
return xfrm4_transport_gso_segment(x, skb, features);
+ case XFRM_MODE_BEET:
+ return xfrm4_beet_gso_segment(x, skb, features);
}
return ERR_PTR(-EOPNOTSUPP);
--
2.1.0
next prev parent reply other threads:[~2020-03-26 9:02 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-26 9:02 [PATCH ipsec-next 0/3] xfrm: add offload support for esp beet mode Xin Long
2020-03-26 9:02 ` Xin Long [this message]
2020-03-26 9:02 ` [PATCH ipsec-next 2/3] esp6: add gso_segment for esp6 " Xin Long
2020-03-26 9:02 ` [PATCH ipsec-next 3/3] xfrm: add prep for esp beet mode offload Xin Long
2020-03-27 7:51 ` [PATCH ipsec-next 0/3] xfrm: add offload support for esp beet mode Steffen Klassert
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