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| author | Xin Long <lucien.xin@gmail.com> | 2020-03-26 17:02:30 +0800 |
|---|---|---|
| committer | Steffen Klassert <steffen.klassert@secunet.com> | 2020-03-26 14:51:07 +0100 |
| commit | 7f9e40eb18a99979f194aa1bdc9bf1c358d3111a (patch) | |
| tree | 2068453370a8fda28108c2be44af2c54db044b7f /net/ipv6 | |
| parent | 384a46ea7bdc77e1e070b728d427b763e364613c (diff) | |
| download | linux-7f9e40eb18a99979f194aa1bdc9bf1c358d3111a.tar.gz linux-7f9e40eb18a99979f194aa1bdc9bf1c358d3111a.tar.bz2 linux-7f9e40eb18a99979f194aa1bdc9bf1c358d3111a.zip | |
esp6: add gso_segment for esp6 beet mode
Similar to xfrm6_tunnel/transport_gso_segment(), _gso_segment()
is added to do gso_segment for esp6 beet mode. Before calling
inet6_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_TCPV6 to gso_type if x->sel.family != AF_INET6
and the proto == IPPROTO_TCP, so that the current tcp ipv6
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/ipv6')
| -rw-r--r-- | net/ipv6/esp6_offload.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/net/ipv6/esp6_offload.c b/net/ipv6/esp6_offload.c index fd535053245b..8eab2c869d61 100644 --- a/net/ipv6/esp6_offload.c +++ b/net/ipv6/esp6_offload.c @@ -159,6 +159,40 @@ static struct sk_buff *xfrm6_transport_gso_segment(struct xfrm_state *x, return segs; } +static struct sk_buff *xfrm6_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; + } + + if (x->sel.family != AF_INET6) { + skb->transport_header -= + (sizeof(struct ipv6hdr) - sizeof(struct iphdr)); + + if (proto == IPPROTO_TCP) + skb_shinfo(skb)->gso_type |= SKB_GSO_TCPV6; + } + + __skb_pull(skb, skb_transport_offset(skb)); + ops = rcu_dereference(inet6_offloads[proto]); + if (likely(ops && ops->callbacks.gso_segment)) + segs = ops->callbacks.gso_segment(skb, features); + + return segs; +} + static struct sk_buff *xfrm6_outer_mode_gso_segment(struct xfrm_state *x, struct sk_buff *skb, netdev_features_t features) @@ -168,6 +202,8 @@ static struct sk_buff *xfrm6_outer_mode_gso_segment(struct xfrm_state *x, return xfrm6_tunnel_gso_segment(x, skb, features); case XFRM_MODE_TRANSPORT: return xfrm6_transport_gso_segment(x, skb, features); + case XFRM_MODE_BEET: + return xfrm6_beet_gso_segment(x, skb, features); } return ERR_PTR(-EOPNOTSUPP); |