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cxgb4: add tc flower match support for TOS 

Add support for matching on IP TOS.  Also check on ethtype value
to be either IPv4 or IPv6.

Signed-off-by: Kumar Sanghvi <kumaras@chelsio.com>
Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy@chelsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Kumar Sanghvi 2017-10-18 20:49:07 +05:30 committed by David S. Miller
parent 890056783c
commit bda1e22915
1 changed files with 50 additions and 1 deletions
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51
drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.c
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@ -147,6 +147,19 @@ static void cxgb4_process_flow_match(struct net_device *dev,
fs->mask.fport = cpu_to_be16(mask->src);
}
if (dissector_uses_key(cls->dissector, FLOW_DISSECTOR_KEY_IP)) {
struct flow_dissector_key_ip *key, *mask;
key = skb_flow_dissector_target(cls->dissector,
FLOW_DISSECTOR_KEY_IP,
cls->key);
mask = skb_flow_dissector_target(cls->dissector,
FLOW_DISSECTOR_KEY_IP,
cls->mask);
fs->val.tos = key->tos;
fs->mask.tos = mask->tos;
}
/* Match only packets coming from the ingress port where this
* filter will be created.
*/
@ -157,16 +170,52 @@ static void cxgb4_process_flow_match(struct net_device *dev,
static int cxgb4_validate_flow_match(struct net_device *dev,
struct tc_cls_flower_offload *cls)
{
u16 ethtype_mask = 0;
u16 ethtype_key = 0;
if (cls->dissector->used_keys &
~(BIT(FLOW_DISSECTOR_KEY_CONTROL) |
BIT(FLOW_DISSECTOR_KEY_BASIC) |
BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) |
BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
BIT(FLOW_DISSECTOR_KEY_PORTS))) {
BIT(FLOW_DISSECTOR_KEY_PORTS) |
BIT(FLOW_DISSECTOR_KEY_IP))) {
netdev_warn(dev, "Unsupported key used: 0x%x\n",
cls->dissector->used_keys);
return -EOPNOTSUPP;
}
if (dissector_uses_key(cls->dissector, FLOW_DISSECTOR_KEY_BASIC)) {
struct flow_dissector_key_basic *key =
skb_flow_dissector_target(cls->dissector,
FLOW_DISSECTOR_KEY_BASIC,
cls->key);
struct flow_dissector_key_basic *mask =
skb_flow_dissector_target(cls->dissector,
FLOW_DISSECTOR_KEY_BASIC,
cls->mask);
ethtype_key = ntohs(key->n_proto);
ethtype_mask = ntohs(mask->n_proto);
}
if (dissector_uses_key(cls->dissector, FLOW_DISSECTOR_KEY_IP)) {
u16 eth_ip_type = ethtype_key & ethtype_mask;
struct flow_dissector_key_ip *mask;
if (eth_ip_type != ETH_P_IP && eth_ip_type != ETH_P_IPV6) {
netdev_err(dev, "IP Key supported only with IPv4/v6");
return -EINVAL;
}
mask = skb_flow_dissector_target(cls->dissector,
FLOW_DISSECTOR_KEY_IP,
cls->mask);
if (mask->ttl) {
netdev_warn(dev, "ttl match unsupported for offload");
return -EOPNOTSUPP;
}
}
return 0;
}