diff options
| author |   Jianbo Liu <jianbol@mellanox.com> | 2018-07-06 05:38:14 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2018-07-07 20:51:53 +0900 |
| commit | 24c590e3b0f9eebe603ebe3d516990306d385f46 (patch) | |
| tree | 25321f2b85f73f796844199f93dda0d83360541c /net/core | |
| parent | net/sched: flower: Add support for matching on vlan ethertype (diff) | |
| download | linux-dev-24c590e3b0f9eebe603ebe3d516990306d385f46.tar.xz linux-dev-24c590e3b0f9eebe603ebe3d516990306d385f46.zip | |
net/flow_dissector: Add support for QinQ dissection
Dissect the QinQ packets to get both outer and inner vlan information,
then store to the extended flow keys.
Signed-off-by: Jianbo Liu <jianbol@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
| -rw-r--r-- | net/core/flow_dissector.c | 32 |
1 files changed, 17 insertions, 15 deletions
diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c index 18cb99b50cba..b555fc229e96 100644 --- a/net/core/flow_dissector.c +++ b/net/core/flow_dissector.c @@ -589,7 +589,7 @@ bool __skb_flow_dissect(const struct sk_buff *skb, struct flow_dissector_key_tags *key_tags; struct flow_dissector_key_vlan *key_vlan; enum flow_dissect_ret fdret; - bool skip_vlan = false; + enum flow_dissector_key_id dissector_vlan = FLOW_DISSECTOR_KEY_MAX; int num_hdrs = 0; u8 ip_proto = 0; bool ret; @@ -748,15 +748,14 @@ proto_again: } case htons(ETH_P_8021AD): case htons(ETH_P_8021Q): { - const struct vlan_hdr *vlan; + const struct vlan_hdr *vlan = NULL; struct vlan_hdr _vlan; - bool vlan_tag_present = skb && skb_vlan_tag_present(skb); __be16 saved_vlan_tpid = proto; - if (vlan_tag_present) + if (dissector_vlan == FLOW_DISSECTOR_KEY_MAX && + skb && skb_vlan_tag_present(skb)) { proto = skb->protocol; - - if (!vlan_tag_present || eth_type_vlan(skb->protocol)) { + } else { vlan = __skb_header_pointer(skb, nhoff, sizeof(_vlan), data, hlen, &_vlan); if (!vlan) { @@ -766,20 +765,23 @@ proto_again: proto = vlan->h_vlan_encapsulated_proto; nhoff += sizeof(*vlan); - if (skip_vlan) { - fdret = FLOW_DISSECT_RET_PROTO_AGAIN; - break; - } } - skip_vlan = true; - if (dissector_uses_key(flow_dissector, - FLOW_DISSECTOR_KEY_VLAN)) { + if (dissector_vlan == FLOW_DISSECTOR_KEY_MAX) { + dissector_vlan = FLOW_DISSECTOR_KEY_VLAN; + } else if (dissector_vlan == FLOW_DISSECTOR_KEY_VLAN) { + dissector_vlan = FLOW_DISSECTOR_KEY_CVLAN; + } else { + fdret = FLOW_DISSECT_RET_PROTO_AGAIN; + break; + } + + if (dissector_uses_key(flow_dissector, dissector_vlan)) { key_vlan = skb_flow_dissector_target(flow_dissector, - FLOW_DISSECTOR_KEY_VLAN, + dissector_vlan, target_container); - if (vlan_tag_present) { + if (!vlan) { key_vlan->vlan_id = skb_vlan_tag_get_id(skb); key_vlan->vlan_priority = (skb_vlan_tag_get_prio(skb) >> VLAN_PRIO_SHIFT); |