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authorXin Long2020-03-26 17:02:29 +0800
committerSteffen Klassert2020-03-26 14:51:07 +0100
commit384a46ea7bdc77e1e070b728d427b763e364613c (patch)
treed74fd1132a401d38f6b9e545d9c4995fe32bdddf /net/ipv4
parentdda520c4d4623701dd70cf7b40d29a4eed232d0f (diff)
esp4: add gso_segment for esp4 beet mode
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> Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'net/ipv4')
-rw-r--r--net/ipv4/esp4_offload.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/net/ipv4/esp4_offload.c b/net/ipv4/esp4_offload.c
index e2e219c7854a..731022cff600 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);