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net/mlx5e: Don't match on vlan non-existence if ethertype is wildcarded 

For the "all" ethertype we should not care whether the packet has
vlans. Besides being wrong, the way we did it caused FW error
for rules such as:

tc filter add dev eth0 protocol all parent ffff: \
	prio 1 flower skip_sw action drop

b/c the matching meta-data (outer headers bit in struct mlx5_flow_spec)
wasn't set. Fix that by matching on vlan non-existence only if we were
also told to match on the ethertype.

Fixes: cee2648762 ('net/mlx5e: Set vlan masks for all offloaded TC rules')
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reported-by: Slava Ovsiienko <viacheslavo@mellanox.com>
Reviewed-by: Jianbo Liu <jianbol@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
This commit is contained in:
Or Gerlitz 2018-10-25 15:41:58 +00:00 committed by Saeed Mahameed
parent acf3766b36
commit d3a80bb5a3
1 changed files with 32 additions and 31 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

63
drivers/net/ethernet/mellanox/mlx5/core/en_tc.c
View File

@ -1447,31 +1447,21 @@ static int __parse_cls_flower(struct mlx5e_priv *priv,
inner_headers);
}
if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
struct flow_dissector_key_eth_addrs *key =
if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_BASIC)) {
struct flow_dissector_key_basic *key =
skb_flow_dissector_target(f->dissector,
FLOW_DISSECTOR_KEY_ETH_ADDRS,
FLOW_DISSECTOR_KEY_BASIC,
f->key);
struct flow_dissector_key_eth_addrs *mask =
struct flow_dissector_key_basic *mask =
skb_flow_dissector_target(f->dissector,
FLOW_DISSECTOR_KEY_ETH_ADDRS,
FLOW_DISSECTOR_KEY_BASIC,
f->mask);
MLX5_SET(fte_match_set_lyr_2_4, headers_c, ethertype,
ntohs(mask->n_proto));
MLX5_SET(fte_match_set_lyr_2_4, headers_v, ethertype,
ntohs(key->n_proto));
ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
dmac_47_16),
mask->dst);
ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
dmac_47_16),
key->dst);
ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
smac_47_16),
mask->src);
ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
smac_47_16),
key->src);
if (!is_zero_ether_addr(mask->src) || !is_zero_ether_addr(mask->dst))
if (mask->n_proto)
*match_level = MLX5_MATCH_L2;
}
@ -1505,9 +1495,10 @@ static int __parse_cls_flower(struct mlx5e_priv *priv,
*match_level = MLX5_MATCH_L2;
}
} else {
} else if (*match_level != MLX5_MATCH_NONE) {
MLX5_SET(fte_match_set_lyr_2_4, headers_c, svlan_tag, 1);
MLX5_SET(fte_match_set_lyr_2_4, headers_c, cvlan_tag, 1);
*match_level = MLX5_MATCH_L2;
}
if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_CVLAN)) {
@ -1545,21 +1536,31 @@ static int __parse_cls_flower(struct mlx5e_priv *priv,
}
}
if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_BASIC)) {
struct flow_dissector_key_basic *key =
if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
struct flow_dissector_key_eth_addrs *key =
skb_flow_dissector_target(f->dissector,
FLOW_DISSECTOR_KEY_BASIC,
FLOW_DISSECTOR_KEY_ETH_ADDRS,
f->key);
struct flow_dissector_key_basic *mask =
struct flow_dissector_key_eth_addrs *mask =
skb_flow_dissector_target(f->dissector,
FLOW_DISSECTOR_KEY_BASIC,
FLOW_DISSECTOR_KEY_ETH_ADDRS,
f->mask);
MLX5_SET(fte_match_set_lyr_2_4, headers_c, ethertype,
ntohs(mask->n_proto));
MLX5_SET(fte_match_set_lyr_2_4, headers_v, ethertype,
ntohs(key->n_proto));
if (mask->n_proto)
ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
dmac_47_16),
mask->dst);
ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
dmac_47_16),
key->dst);
ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_c,
smac_47_16),
mask->src);
ether_addr_copy(MLX5_ADDR_OF(fte_match_set_lyr_2_4, headers_v,
smac_47_16),
key->src);
if (!is_zero_ether_addr(mask->src) || !is_zero_ether_addr(mask->dst))
*match_level = MLX5_MATCH_L2;
}