diff options
| author | Jiri Benc <jbenc@redhat.com> | 2016-10-05 16:01:57 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-10-12 08:42:52 +0300 |
| commit | c66549ffd666605831abf6cf19ce0571ad868e39 (patch) | |
| tree | 9078e08204c4f03e6fed95845905219979e8a6d8 /net/openvswitch | |
| parent | bb10bb3ea8d6417d89ff1dd4df75d44f8c97ff56 (diff) | |
| download | linux-c66549ffd666605831abf6cf19ce0571ad868e39.tar.xz | |
openvswitch: correctly fragment packet with mpls headers
If mpls headers were pushed to a defragmented packet, the refragmentation no
longer works correctly after 48d2ab609b6b ("net: mpls: Fixups for GSO"). The
network header has to be shifted after the mpls headers for the
fragmentation and restored afterwards.
Fixes: 48d2ab609b6b ("net: mpls: Fixups for GSO")
Signed-off-by: Jiri Benc <jbenc@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/openvswitch')
| -rw-r--r-- | net/openvswitch/actions.c | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/net/openvswitch/actions.c b/net/openvswitch/actions.c index 4e03f64709bc..1105c4e29c62 100644 --- a/net/openvswitch/actions.c +++ b/net/openvswitch/actions.c @@ -62,7 +62,8 @@ struct ovs_frag_data { struct vport *vport; struct ovs_skb_cb cb; __be16 inner_protocol; - __u16 vlan_tci; + u16 network_offset; /* valid only for MPLS */ + u16 vlan_tci; __be16 vlan_proto; unsigned int l2_len; u8 l2_data[MAX_L2_LEN]; @@ -666,6 +667,12 @@ static int ovs_vport_output(struct net *net, struct sock *sk, struct sk_buff *sk skb_postpush_rcsum(skb, skb->data, data->l2_len); skb_reset_mac_header(skb); + if (eth_p_mpls(skb->protocol)) { + skb->inner_network_header = skb->network_header; + skb_set_network_header(skb, data->network_offset); + skb_reset_mac_len(skb); + } + ovs_vport_send(vport, skb); return 0; } @@ -684,7 +691,8 @@ static struct dst_ops ovs_dst_ops = { /* prepare_frag() is called once per (larger-than-MTU) frame; its inverse is * ovs_vport_output(), which is called once per fragmented packet. */ -static void prepare_frag(struct vport *vport, struct sk_buff *skb) +static void prepare_frag(struct vport *vport, struct sk_buff *skb, + u16 orig_network_offset) { unsigned int hlen = skb_network_offset(skb); struct ovs_frag_data *data; @@ -694,6 +702,7 @@ static void prepare_frag(struct vport *vport, struct sk_buff *skb) data->vport = vport; data->cb = *OVS_CB(skb); data->inner_protocol = skb->inner_protocol; + data->network_offset = orig_network_offset; data->vlan_tci = skb->vlan_tci; data->vlan_proto = skb->vlan_proto; data->l2_len = hlen; @@ -706,6 +715,13 @@ static void prepare_frag(struct vport *vport, struct sk_buff *skb) static void ovs_fragment(struct net *net, struct vport *vport, struct sk_buff *skb, u16 mru, __be16 ethertype) { + u16 orig_network_offset = 0; + + if (eth_p_mpls(skb->protocol)) { + orig_network_offset = skb_network_offset(skb); + skb->network_header = skb->inner_network_header; + } + if (skb_network_offset(skb) > MAX_L2_LEN) { OVS_NLERR(1, "L2 header too long to fragment"); goto err; @@ -715,7 +731,7 @@ static void ovs_fragment(struct net *net, struct vport *vport, struct dst_entry ovs_dst; unsigned long orig_dst; - prepare_frag(vport, skb); + prepare_frag(vport, skb, orig_network_offset); dst_init(&ovs_dst, &ovs_dst_ops, NULL, 1, DST_OBSOLETE_NONE, DST_NOCOUNT); ovs_dst.dev = vport->dev; @@ -735,7 +751,7 @@ static void ovs_fragment(struct net *net, struct vport *vport, goto err; } - prepare_frag(vport, skb); + prepare_frag(vport, skb, orig_network_offset); memset(&ovs_rt, 0, sizeof(ovs_rt)); dst_init(&ovs_rt.dst, &ovs_dst_ops, NULL, 1, DST_OBSOLETE_NONE, DST_NOCOUNT); |