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net/mlx5: fix RSS flow rule with L4 mismatch

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The RSS hash types defined in the API do not support setting the L4 proto
type (TCP or UDP) without setting the L3 proto. For example, ETH_RSS_TCP
is defined as
(ETH_RSS_NONFRAG_IPV4_TCP | \
 ETH_RSS_NONFRAG_IPV6_TCP | \
 ETH_RSS_IPV6_TCP_EX).

The L3 proto of the RSS hash type may be different than the one defined
in the pattern, for example:
testpmd> flow create .../ ipv4 / tcp / end actions rss types ipv6-tcp-ex
end / end

If the RSS hash type also includes L4 proto type as in the above example,
the selection flags for the RX hash are currently set with SPORT/DPORT
without setting SRC/DST IP. As this combination is not supported, it does
not match any of the pre-created TIRs of the indirect RSS action
and the flow creation fails.

The fix is to prevent setting the selection flags for the RX hash with
SPORT/DPORT without setting SRC/DST IP. It applies non-RSS processing of
the received packets. In case of indirect RSS action, it will match the
MLX5_RSS_HASH_NONE pre-created TIR.

Fixes: b1d63d829378 ("net/mlx5: support RSS on src or dst fields only")
Fixes: 4a78c88e3bae ("net/mlx5: fix Verbs flow tunnel")
Cc: stable@dpdk.org

Signed-off-by: Lior Margalit <lmargalit@nvidia.com>
Acked-by: Matan Azrad <matan@nvidia.com>
This commit is contained in:
Lior Margalit 2021-07-27 09:46:19 +03:00 committed by Raslan Darawsheh
parent 7356aec64c
commit 5e1db76dd8
2 changed files with 15 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/net/mlx5/mlx5_flow_dv.c
View File

@ -10896,10 +10896,8 @@ flow_dv_hashfields_set(struct mlx5_flow *dev_flow,
dev_flow->hash_fields = 0;
#ifdef HAVE_IBV_DEVICE_TUNNEL_SUPPORT
if (rss_desc->level >= 2) {
dev_flow->hash_fields |= IBV_RX_HASH_INNER;
if (rss_desc->level >= 2)
rss_inner = 1;
}
#endif
if ((rss_inner && (items & MLX5_FLOW_LAYER_INNER_L3_IPV4)) ||
(!rss_inner && (items & MLX5_FLOW_LAYER_OUTER_L3_IPV4))) {
@ -10922,6 +10920,12 @@ flow_dv_hashfields_set(struct mlx5_flow *dev_flow,
dev_flow->hash_fields |= MLX5_IPV6_IBV_RX_HASH;
}
}
if (dev_flow->hash_fields == 0)
/*
* There is no match between the RSS types and the
* L3 protocol (IPv4/IPv6) defined in the flow rule.
*/
return;
if ((rss_inner && (items & MLX5_FLOW_LAYER_INNER_L4_UDP)) ||
(!rss_inner && (items & MLX5_FLOW_LAYER_OUTER_L4_UDP))) {
if (rss_types & ETH_RSS_UDP) {
@ -10947,6 +10951,8 @@ flow_dv_hashfields_set(struct mlx5_flow *dev_flow,
dev_flow->hash_fields |= MLX5_TCP_IBV_RX_HASH;
}
}
if (rss_inner)
dev_flow->hash_fields |= IBV_RX_HASH_INNER;
}
/**

10
drivers/net/mlx5/mlx5_flow_verbs.c
View File

@ -1821,8 +1821,9 @@ flow_verbs_translate(struct rte_eth_dev *dev,
flow_verbs_translate_item_tcp(dev_flow, items,
item_flags);
subpriority = MLX5_PRIORITY_MAP_L4;
dev_flow->hash_fields |=
mlx5_flow_hashfields_adjust
if (dev_flow->hash_fields != 0)
dev_flow->hash_fields |=
mlx5_flow_hashfields_adjust
(rss_desc, tunnel, ETH_RSS_TCP,
(IBV_RX_HASH_SRC_PORT_TCP |
IBV_RX_HASH_DST_PORT_TCP));
@ -1833,8 +1834,9 @@ flow_verbs_translate(struct rte_eth_dev *dev,
flow_verbs_translate_item_udp(dev_flow, items,
item_flags);
subpriority = MLX5_PRIORITY_MAP_L4;
dev_flow->hash_fields |=
mlx5_flow_hashfields_adjust
if (dev_flow->hash_fields != 0)
dev_flow->hash_fields |=
mlx5_flow_hashfields_adjust
(rss_desc, tunnel, ETH_RSS_UDP,
(IBV_RX_HASH_SRC_PORT_UDP |
IBV_RX_HASH_DST_PORT_UDP));