diff options
Diffstat (limited to 'net/xfrm/xfrm_device.c')
| -rw-r--r-- | net/xfrm/xfrm_device.c | 46 |
1 files changed, 34 insertions, 12 deletions
diff --git a/net/xfrm/xfrm_device.c b/net/xfrm/xfrm_device.c index d1fa94e52cea..d62f76161d83 100644 --- a/net/xfrm/xfrm_device.c +++ b/net/xfrm/xfrm_device.c @@ -244,11 +244,6 @@ int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, xfrm_address_t *daddr; bool is_packet_offload; - if (!x->type_offload) { - NL_SET_ERR_MSG(extack, "Type doesn't support offload"); - return -EINVAL; - } - if (xuo->flags & ~(XFRM_OFFLOAD_IPV6 | XFRM_OFFLOAD_INBOUND | XFRM_OFFLOAD_PACKET)) { NL_SET_ERR_MSG(extack, "Unrecognized flags in offload request"); @@ -310,6 +305,13 @@ int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, return -EINVAL; } + xfrm_set_type_offload(x); + if (!x->type_offload) { + NL_SET_ERR_MSG(extack, "Type doesn't support offload"); + dev_put(dev); + return -EINVAL; + } + xso->dev = dev; netdev_tracker_alloc(dev, &xso->dev_tracker, GFP_ATOMIC); xso->real_dev = dev; @@ -332,6 +334,7 @@ int xfrm_dev_state_add(struct net *net, struct xfrm_state *x, netdev_put(dev, &xso->dev_tracker); xso->type = XFRM_DEV_OFFLOAD_UNSPECIFIED; + xfrm_unset_type_offload(x); /* User explicitly requested packet offload mode and configured * policy in addition to the XFRM state. So be civil to users, * and return an error instead of taking fallback path. @@ -415,14 +418,12 @@ bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x) struct dst_entry *dst = skb_dst(skb); struct xfrm_dst *xdst = (struct xfrm_dst *)dst; struct net_device *dev = x->xso.dev; + bool check_tunnel_size; - if (!x->type_offload || - (x->xso.type == XFRM_DEV_OFFLOAD_UNSPECIFIED && x->encap)) + if (x->xso.type == XFRM_DEV_OFFLOAD_UNSPECIFIED) return false; - if (x->xso.type == XFRM_DEV_OFFLOAD_PACKET || - ((!dev || (dev == xfrm_dst_path(dst)->dev)) && - !xdst->child->xfrm)) { + if ((dev == xfrm_dst_path(dst)->dev) && !xdst->child->xfrm) { mtu = xfrm_state_mtu(x, xdst->child_mtu_cached); if (skb->len <= mtu) goto ok; @@ -434,8 +435,29 @@ bool xfrm_dev_offload_ok(struct sk_buff *skb, struct xfrm_state *x) return false; ok: - if (dev && dev->xfrmdev_ops && dev->xfrmdev_ops->xdo_dev_offload_ok) - return x->xso.dev->xfrmdev_ops->xdo_dev_offload_ok(skb, x); + check_tunnel_size = x->xso.type == XFRM_DEV_OFFLOAD_PACKET && + x->props.mode == XFRM_MODE_TUNNEL; + switch (x->props.family) { + case AF_INET: + /* Check for IPv4 options */ + if (ip_hdr(skb)->ihl != 5) + return false; + if (check_tunnel_size && xfrm4_tunnel_check_size(skb)) + return false; + break; + case AF_INET6: + /* Check for IPv6 extensions */ + if (ipv6_ext_hdr(ipv6_hdr(skb)->nexthdr)) + return false; + if (check_tunnel_size && xfrm6_tunnel_check_size(skb)) + return false; + break; + default: + break; + } + + if (dev->xfrmdev_ops->xdo_dev_offload_ok) + return dev->xfrmdev_ops->xdo_dev_offload_ok(skb, x); return true; } |