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nfp: flower: fix unsupported pre_tunnel flows 

There are some pre_tunnel flows combinations which are incorrectly being
offloaded without proper support, fix these.

- Matching on MPLS is not supported for pre_tun.
- Match on IPv4/IPv6 layer must be present.
- Destination MAC address must match pre_tun.dev MAC

Fixes: 120ffd84a9 ("nfp: flower: verify pre-tunnel rules")
Signed-off-by: Louis Peens <louis.peens@corigine.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
rM2-mainline
Louis Peens 2021-03-16 19:13:08 +01:00 committed by David S. Miller
parent a3bc483216
commit 982e5ee23d
1 changed files with 18 additions and 0 deletions
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18
drivers/net/ethernet/netronome/nfp/flower/offload.c
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@ -1142,6 +1142,12 @@ nfp_flower_validate_pre_tun_rule(struct nfp_app *app,
return -EOPNOTSUPP;
}
if (!(key_layer & NFP_FLOWER_LAYER_IPV4) &&
!(key_layer & NFP_FLOWER_LAYER_IPV6)) {
NL_SET_ERR_MSG_MOD(extack, "unsupported pre-tunnel rule: match on ipv4/ipv6 eth_type must be present");
return -EOPNOTSUPP;
}
/* Skip fields known to exist. */
mask += sizeof(struct nfp_flower_meta_tci);
ext += sizeof(struct nfp_flower_meta_tci);
@ -1152,6 +1158,13 @@ nfp_flower_validate_pre_tun_rule(struct nfp_app *app,
mask += sizeof(struct nfp_flower_in_port);
ext += sizeof(struct nfp_flower_in_port);
/* Ensure destination MAC address matches pre_tun_dev. */
mac = (struct nfp_flower_mac_mpls *)ext;
if (memcmp(&mac->mac_dst[0], flow->pre_tun_rule.dev->dev_addr, 6)) {
NL_SET_ERR_MSG_MOD(extack, "unsupported pre-tunnel rule: dest MAC must match output dev MAC");
return -EOPNOTSUPP;
}
/* Ensure destination MAC address is fully matched. */
mac = (struct nfp_flower_mac_mpls *)mask;
if (!is_broadcast_ether_addr(&mac->mac_dst[0])) {
@ -1159,6 +1172,11 @@ nfp_flower_validate_pre_tun_rule(struct nfp_app *app,
return -EOPNOTSUPP;
}
if (mac->mpls_lse) {
NL_SET_ERR_MSG_MOD(extack, "unsupported pre-tunnel rule: MPLS not supported");
return -EOPNOTSUPP;
}
mask += sizeof(struct nfp_flower_mac_mpls);
ext += sizeof(struct nfp_flower_mac_mpls);
if (key_layer & NFP_FLOWER_LAYER_IPV4 ||