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net/mlx5: fix meter hierarchy with modify header

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If any meter in the hierarchy has a policy flow containing set_tag or
modify_field action, the policy flow must match the src port to which
the policy belongs, to determine the order of modify_hdr and
meter action. But the meter hierarchy will not be able to use by
user flow that matches another src port.

To use this type of meter hierarchy for other src ports, we need to add
a new policy flow matching the new src port from the user flow
dynamically. But then it cannot be used by flow matching all ports.

Fixes: ca7e6051e7 ("net/mlx5: limit meter flow when matching all ports")
Cc: stable@dpdk.org

Signed-off-by: Shun Hao <shunh@nvidia.com>
Acked-by: Matan Azrad <matan@nvidia.com>
This commit is contained in:
Shun Hao 2022-11-08 12:04:00 +02:00 committed by Raslan Darawsheh
parent 35f482afa2
commit 8330a5fb3a
4 changed files with 31 additions and 15 deletions
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3
doc/guides/nics/mlx5.rst
View File

@ -511,6 +511,9 @@ Limitations
if meter has drop count
or meter hierarchy contains any meter that uses drop count,
it cannot be used by flow rule matching all ports.
- When using DV flow engine (``dv_flow_en`` = 1),
if meter hierarchy contains any meter that has MODIFY_FIELD/SET_TAG,
it cannot be used by flow matching all ports.
- When using HWS flow engine (``dv_flow_en`` = 2),
only meter mark action is supported.

6
drivers/net/mlx5/mlx5.h
View File

@ -846,8 +846,10 @@ struct mlx5_flow_meter_policy {
/* Is queue action in policy table. */
uint32_t is_hierarchy:1;
/* Is meter action in policy table. */
uint32_t hierarchy_drop_cnt:1;
/* Is any meter in hierarchy contains drop_cnt. */
uint32_t match_port:1;
/* If policy flows match src port. */
uint32_t hierarchy_match_port:1;
/* Is any meter in hierarchy contains policy flow that matches src port. */
uint32_t skip_r:1;
/* If red color policy is skipped. */
uint32_t skip_y:1;

2
drivers/net/mlx5/mlx5_flow.c
View File

@ -5472,7 +5472,7 @@ flow_meter_split_prep(struct rte_eth_dev *dev,
case RTE_FLOW_ITEM_TYPE_PORT_REPRESENTOR:
if (mlx5_flow_get_item_vport_id(dev, items, &flow_src_port, NULL, error))
return -rte_errno;
if (!fm->def_policy && wks->policy->is_hierarchy &&
if (!fm->def_policy && wks->policy->hierarchy_match_port &&
flow_src_port != priv->representor_id) {
if (flow_drv_mtr_hierarchy_rule_create(dev,
flow, fm,

35
drivers/net/mlx5/mlx5_flow_dv.c
View File

@ -5445,11 +5445,12 @@ mlx5_flow_validate_action_meter(struct rte_eth_dev *dev,
"have different src port.");
}
/* When flow matching all src ports, meter should not have drop count. */
if (all_ports && (fm->drop_cnt || mtr_policy->hierarchy_drop_cnt))
if (all_ports && (fm->drop_cnt || mtr_policy->hierarchy_match_port))
return rte_flow_error_set(error, EINVAL,
RTE_FLOW_ERROR_TYPE_ITEM_SPEC, NULL,
"Meter drop count not supported "
"when matching all ports.");
"Meter drop count or "
"modify_field/set_tag in meter hierarchy "
"not supported when matching all ports.");
} else if (mtr_policy->is_rss) {
struct mlx5_flow_meter_policy *fp;
struct mlx5_meter_policy_action_container *acg;
@ -16661,8 +16662,8 @@ __flow_dv_create_domain_policy_acts(struct rte_eth_dev *dev,
mtr_policy->dev = next_policy->dev;
if (next_policy->mark)
mtr_policy->mark = 1;
if (next_fm->drop_cnt || next_policy->hierarchy_drop_cnt)
mtr_policy->hierarchy_drop_cnt = 1;
mtr_policy->hierarchy_match_port =
next_policy->hierarchy_match_port;
action_flags |=
MLX5_FLOW_ACTION_METER_WITH_TERMINATED_POLICY;
break;
@ -17414,6 +17415,10 @@ __flow_dv_create_policy_acts_rules(struct rte_eth_dev *dev,
"Failed to create policy rules per domain.");
goto err_exit;
}
if (match_src_port) {
mtr_policy->match_port = match_src_port;
mtr_policy->hierarchy_match_port = match_src_port;
}
return 0;
err_exit:
for (i = 0; i < RTE_COLORS; i++)
@ -18036,7 +18041,7 @@ mlx5_meter_hierarchy_skip_tag_rule(struct mlx5_priv *priv,
NULL, "Failed to find next meter in hierarchy.");
goto exit;
}
if (!(*next_fm)->drop_cnt) {
if (!mtr_policy->match_port) {
*skip = true;
goto exit;
}
@ -18136,6 +18141,9 @@ flow_dv_meter_hierarchy_rule_create(struct rte_eth_dev *dev,
rte_spinlock_lock(&mtr_policy->sl);
sub_policy = mtr_policy->sub_policys[domain][0];
for (j = 0; j < MLX5_MTR_RTE_COLORS; j++) {
uint8_t act_n = 0;
struct mlx5_flow_dv_modify_hdr_resource *modify_hdr;
if (mtr_policy->act_cnt[j].fate_action != MLX5_FLOW_FATE_MTR)
continue;
color_rule = mlx5_malloc(MLX5_MEM_ZERO,
@ -18166,15 +18174,18 @@ flow_dv_meter_hierarchy_rule_create(struct rte_eth_dev *dev,
next_sub_policy = next_policy->sub_policys[domain][0];
tbl_data = container_of(next_sub_policy->tbl_rsc,
struct mlx5_flow_tbl_data_entry, tbl);
modify_hdr = mtr_policy->act_cnt[j].modify_hdr;
if (mtr_first) {
acts.dv_actions[0] = mtr_action;
acts.dv_actions[1] = mtr_policy->act_cnt[j].modify_hdr->action;
acts.dv_actions[act_n++] = mtr_action;
if (modify_hdr)
acts.dv_actions[act_n++] = modify_hdr->action;
} else {
acts.dv_actions[0] = mtr_policy->act_cnt[j].modify_hdr->action;
acts.dv_actions[1] = mtr_action;
if (modify_hdr)
acts.dv_actions[act_n++] = modify_hdr->action;
acts.dv_actions[act_n++] = mtr_action;
}
acts.dv_actions[2] = tbl_data->jump.action;
acts.actions_n = 3;
acts.dv_actions[act_n++] = tbl_data->jump.action;
acts.actions_n = act_n;
if (__flow_dv_create_policy_matcher(dev, color_reg_c_idx,
MLX5_MTR_POLICY_MATCHER_PRIO, sub_policy,
&attr, true, item, &color_rule->matcher, error)) {