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| author |   Hadar Hen Zion <hadarh@mellanox.com> | 2016-08-17 13:36:11 +0300 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2016-08-18 23:13:13 -0700 |
| commit | f6a66927692e30bdc1792e7a1fc2107d4dfcf42d (patch) | |
| tree | 7384ae6b8d7378c945a792120b0b64fd156a5b3c /net/core/flow_dissector.c | |
| parent | flow_dissector: For stripped vlan, get vlan info from skb->vlan_tci (diff) | |
| download | linux-dev-f6a66927692e30bdc1792e7a1fc2107d4dfcf42d.tar.xz linux-dev-f6a66927692e30bdc1792e7a1fc2107d4dfcf42d.zip | |
flow_dissector: Get vlan priority in addition to vlan id
Add vlan priority check to the flow dissector by adding new flow
dissector struct, flow_dissector_key_vlan which includes vlan tag
fields.
vlan_id and flow_label fields were under the same struct
(flow_dissector_key_tags). It was a convenient setting since struct
flow_dissector_key_tags is used by struct flow_keys and by setting
vlan_id and flow_label under the same struct, we get precisely 24 or 48
bytes in flow_keys from flow_dissector_key_basic.
Now, when adding vlan priority support, the code will be cleaner if
flow_label and vlan tag won't be under the same struct anymore.
Signed-off-by: Hadar Hen Zion <hadarh@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/flow_dissector.c')
| -rw-r--r-- | net/core/flow_dissector.c | 25 |
1 files changed, 16 insertions, 9 deletions
diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c index 362d693c003f..a2879c0f6c4c 100644 --- a/net/core/flow_dissector.c +++ b/net/core/flow_dissector.c @@ -118,6 +118,7 @@ bool __skb_flow_dissect(const struct sk_buff *skb, struct flow_dissector_key_addrs *key_addrs; struct flow_dissector_key_ports *key_ports; struct flow_dissector_key_tags *key_tags; + struct flow_dissector_key_vlan *key_vlan; struct flow_dissector_key_keyid *key_keyid; bool skip_vlan = false; u8 ip_proto = 0; @@ -266,16 +267,22 @@ ipv6: skip_vlan = true; if (dissector_uses_key(flow_dissector, - FLOW_DISSECTOR_KEY_VLANID)) { - key_tags = skb_flow_dissector_target(flow_dissector, - FLOW_DISSECTOR_KEY_VLANID, + FLOW_DISSECTOR_KEY_VLAN)) { + key_vlan = skb_flow_dissector_target(flow_dissector, + FLOW_DISSECTOR_KEY_VLAN, target_container); - if (skb_vlan_tag_present(skb)) - key_tags->vlan_id = skb_vlan_tag_get_id(skb); - else - key_tags->vlan_id = ntohs(vlan->h_vlan_TCI) & + if (skb_vlan_tag_present(skb)) { + key_vlan->vlan_id = skb_vlan_tag_get_id(skb); + key_vlan->vlan_priority = + (skb_vlan_tag_get_prio(skb) >> VLAN_PRIO_SHIFT); + } else { + key_vlan->vlan_id = ntohs(vlan->h_vlan_TCI) & VLAN_VID_MASK; + key_vlan->vlan_priority = + (ntohs(vlan->h_vlan_TCI) & + VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT; + } } goto again; @@ -935,8 +942,8 @@ static const struct flow_dissector_key flow_keys_dissector_keys[] = { .offset = offsetof(struct flow_keys, ports), }, { - .key_id = FLOW_DISSECTOR_KEY_VLANID, - .offset = offsetof(struct flow_keys, tags), + .key_id = FLOW_DISSECTOR_KEY_VLAN, + .offset = offsetof(struct flow_keys, vlan), }, { .key_id = FLOW_DISSECTOR_KEY_FLOW_LABEL, |