[dpdk-dev] [PATCH] net/mlx5: fix set VLAN id/pcp in new VLAN header
Xiaoyu Min
jackmin at mellanox.com
Fri Nov 1 02:32:32 CET 2019
Currently if user want to set VLAN id/pcp on an about to be pushed VLAN
header, the of_set_vlan_vid/of_set_vlan_pcp must be present _before_
action of_push_vlan:
[1] ... actions of_set_vlan_vid vlan_vid 2 / of_push_vlan ...
This is misleading because people think rule [1] intends to set VLAN id
on the existing VLAN header and then push one new VLAN header on top of
it.
A more natual way to set VLAN id/pcp on an to be pushed VLAN header
should be:
[2] ... actions of_push_vlan / of_set_vlan_vid vlan_vid 2 / ...
Fixes: a5f2da0b816b ("net/mlx5: support modify VLAN ID on new VLAN header")
Fixes: 68fad3635042 ("net/mlx5: support modifying VLAN priority on VLAN header")
Cc: motih at mellanox.com
Signed-off-by: Xiaoyu Min <jackmin at mellanox.com>
---
drivers/net/mlx5/mlx5_flow_dv.c | 122 ++++++++++++++++++++------------
1 file changed, 77 insertions(+), 45 deletions(-)
diff --git a/drivers/net/mlx5/mlx5_flow_dv.c b/drivers/net/mlx5/mlx5_flow_dv.c
index d9a7fd4b25..4be059ded5 100644
--- a/drivers/net/mlx5/mlx5_flow_dv.c
+++ b/drivers/net/mlx5/mlx5_flow_dv.c
@@ -212,6 +212,33 @@ flow_d_shared_unlock(struct rte_eth_dev *dev)
}
}
+/* Update VLAN's VID/PCP based on input rte_flow_action.
+ *
+ * @param[in] action
+ * Pointer to struct rte_flow_action.
+ * @param[out] vlan
+ * Pointer to struct rte_vlan_hdr.
+ */
+static void
+mlx5_update_vlan_vid_pcp(const struct rte_flow_action *action,
+ struct rte_vlan_hdr *vlan)
+{
+ uint16_t vlan_tci;
+ if (action->type == RTE_FLOW_ACTION_TYPE_OF_SET_VLAN_PCP) {
+ vlan_tci =
+ ((const struct rte_flow_action_of_set_vlan_pcp *)
+ action->conf)->vlan_pcp;
+ vlan_tci = vlan_tci << MLX5DV_FLOW_VLAN_PCP_SHIFT;
+ vlan->vlan_tci &= ~MLX5DV_FLOW_VLAN_PCP_MASK;
+ vlan->vlan_tci |= vlan_tci;
+ } else if (action->type == RTE_FLOW_ACTION_TYPE_OF_SET_VLAN_VID) {
+ vlan->vlan_tci &= ~MLX5DV_FLOW_VLAN_VID_MASK;
+ vlan->vlan_tci |= rte_be_to_cpu_16
+ (((const struct rte_flow_action_of_set_vlan_vid *)
+ action->conf)->vlan_vid);
+ }
+}
+
/**
* Convert modify-header action to DV specification.
*
@@ -1050,6 +1077,7 @@ flow_dev_get_vlan_info_from_items(const struct rte_flow_item *items,
*/
static int
flow_dv_validate_action_push_vlan(uint64_t action_flags,
+ uint64_t item_flags,
const struct rte_flow_action *action,
const struct rte_flow_attr *attr,
struct rte_flow_error *error)
@@ -1067,6 +1095,14 @@ flow_dv_validate_action_push_vlan(uint64_t action_flags,
RTE_FLOW_ERROR_TYPE_ACTION, action,
"no support for multiple VLAN "
"actions");
+ if (!mlx5_flow_find_action
+ (action + 1, RTE_FLOW_ACTION_TYPE_OF_SET_VLAN_VID) &&
+ !(item_flags & MLX5_FLOW_LAYER_OUTER_VLAN))
+ return rte_flow_error_set(error, ENOTSUP,
+ RTE_FLOW_ERROR_TYPE_ACTION, action,
+ "push VLAN needs to match on VLAN in order to "
+ "get VLAN VID information because there is "
+ "no followed set VLAN VID action");
(void)attr;
return 0;
}
@@ -1098,17 +1134,16 @@ flow_dv_validate_action_set_vlan_pcp(uint64_t action_flags,
return rte_flow_error_set(error, EINVAL,
RTE_FLOW_ERROR_TYPE_ACTION, action,
"VLAN PCP value is too big");
- if (mlx5_flow_find_action(actions,
- RTE_FLOW_ACTION_TYPE_OF_PUSH_VLAN) == NULL)
+ if (!(action_flags & MLX5_FLOW_ACTION_OF_PUSH_VLAN))
return rte_flow_error_set(error, ENOTSUP,
RTE_FLOW_ERROR_TYPE_ACTION, action,
- "set VLAN PCP can only be used "
- "with push VLAN action");
- if (action_flags & MLX5_FLOW_ACTION_OF_PUSH_VLAN)
+ "set VLAN PCP action must follow "
+ "the push VLAN action");
+ if (action_flags & MLX5_FLOW_ACTION_OF_SET_VLAN_PCP)
return rte_flow_error_set(error, ENOTSUP,
RTE_FLOW_ERROR_TYPE_ACTION, action,
- "set VLAN PCP action must precede "
- "the push VLAN action");
+ "Multiple VLAN PCP modification are "
+ "not supported");
return 0;
}
@@ -1129,6 +1164,7 @@ flow_dv_validate_action_set_vlan_pcp(uint64_t action_flags,
*/
static int
flow_dv_validate_action_set_vlan_vid(uint64_t item_flags,
+ uint64_t action_flags,
const struct rte_flow_action actions[],
struct rte_flow_error *error)
{
@@ -1139,18 +1175,24 @@ flow_dv_validate_action_set_vlan_vid(uint64_t item_flags,
return rte_flow_error_set(error, EINVAL,
RTE_FLOW_ERROR_TYPE_ACTION, action,
"VLAN VID value is too big");
- /* If a push VLAN action follows then it will handle this action */
- if (mlx5_flow_find_action(actions,
- RTE_FLOW_ACTION_TYPE_OF_PUSH_VLAN))
- return 0;
+ /* there is an of_push_vlan action before us */
+ if (action_flags & MLX5_FLOW_ACTION_OF_PUSH_VLAN) {
+ if (mlx5_flow_find_action(actions + 1,
+ RTE_FLOW_ACTION_TYPE_OF_SET_VLAN_VID))
+ return rte_flow_error_set(error, ENOTSUP,
+ RTE_FLOW_ERROR_TYPE_ACTION, action,
+ "Multiple VLAN VID modifications are "
+ "not supported");
+ else
+ return 0;
+ }
/*
* Action is on an existing VLAN header:
* Need to verify this is a single modify CID action.
* Rule mast include a match on outer VLAN.
*/
- if (mlx5_flow_find_action(++action,
- RTE_FLOW_ACTION_TYPE_OF_SET_VLAN_VID))
+ if (action_flags & MLX5_FLOW_ACTION_OF_SET_VLAN_VID)
return rte_flow_error_set(error, ENOTSUP,
RTE_FLOW_ERROR_TYPE_ACTION, action,
"Multiple VLAN VID modifications are "
@@ -3622,6 +3664,7 @@ flow_dv_validate(struct rte_eth_dev *dev, const struct rte_flow_attr *attr,
break;
case RTE_FLOW_ACTION_TYPE_OF_PUSH_VLAN:
ret = flow_dv_validate_action_push_vlan(action_flags,
+ item_flags,
actions, attr,
error);
if (ret < 0)
@@ -3635,13 +3678,16 @@ flow_dv_validate(struct rte_eth_dev *dev, const struct rte_flow_attr *attr,
if (ret < 0)
return ret;
/* Count PCP with push_vlan command. */
+ action_flags |= MLX5_FLOW_ACTION_OF_SET_VLAN_PCP;
break;
case RTE_FLOW_ACTION_TYPE_OF_SET_VLAN_VID:
ret = flow_dv_validate_action_set_vlan_vid
- (item_flags, actions, error);
+ (item_flags, action_flags,
+ actions, error);
if (ret < 0)
return ret;
/* Count VID with push_vlan command. */
+ action_flags |= MLX5_FLOW_ACTION_OF_SET_VLAN_VID;
break;
case RTE_FLOW_ACTION_TYPE_VXLAN_ENCAP:
case RTE_FLOW_ACTION_TYPE_NVGRE_ENCAP:
@@ -5474,8 +5520,6 @@ flow_dv_translate(struct rte_eth_dev *dev,
void *match_value = dev_flow->dv.value.buf;
uint8_t next_protocol = 0xff;
struct rte_vlan_hdr vlan = { 0 };
- bool vlan_inherited = false;
- uint16_t vlan_tci;
uint32_t table;
int ret = 0;
@@ -5500,6 +5544,7 @@ flow_dv_translate(struct rte_eth_dev *dev,
uint32_t port_id = 0;
struct mlx5_flow_dv_port_id_action_resource port_id_resource;
int action_type = actions->type;
+ const struct rte_flow_action *found_action = NULL;
switch (action_type) {
case RTE_FLOW_ACTION_TYPE_VOID:
@@ -5598,49 +5643,36 @@ flow_dv_translate(struct rte_eth_dev *dev,
action_flags |= MLX5_FLOW_ACTION_OF_POP_VLAN;
break;
case RTE_FLOW_ACTION_TYPE_OF_PUSH_VLAN:
- if (!vlan_inherited) {
- flow_dev_get_vlan_info_from_items(items, &vlan);
- vlan_inherited = true;
- }
+ flow_dev_get_vlan_info_from_items(items, &vlan);
vlan.eth_proto = rte_be_to_cpu_16
((((const struct rte_flow_action_of_push_vlan *)
actions->conf)->ethertype));
+ found_action = mlx5_flow_find_action
+ (actions + 1,
+ RTE_FLOW_ACTION_TYPE_OF_SET_VLAN_VID);
+ if (found_action)
+ mlx5_update_vlan_vid_pcp(found_action, &vlan);
+ found_action = mlx5_flow_find_action
+ (actions + 1,
+ RTE_FLOW_ACTION_TYPE_OF_SET_VLAN_PCP);
+ if (found_action)
+ mlx5_update_vlan_vid_pcp(found_action, &vlan);
if (flow_dv_create_action_push_vlan
(dev, attr, &vlan, dev_flow, error))
return -rte_errno;
dev_flow->dv.actions[actions_n++] =
dev_flow->dv.push_vlan_res->action;
action_flags |= MLX5_FLOW_ACTION_OF_PUSH_VLAN;
- /* Push VLAN command is also handling this VLAN_VID */
- action_flags &= ~MLX5_FLOW_ACTION_OF_SET_VLAN_VID;
break;
case RTE_FLOW_ACTION_TYPE_OF_SET_VLAN_PCP:
- if (!vlan_inherited) {
- flow_dev_get_vlan_info_from_items(items, &vlan);
- vlan_inherited = true;
- }
- vlan_tci =
- ((const struct rte_flow_action_of_set_vlan_pcp *)
- actions->conf)->vlan_pcp;
- vlan_tci = vlan_tci << MLX5DV_FLOW_VLAN_PCP_SHIFT;
- vlan.vlan_tci &= ~MLX5DV_FLOW_VLAN_PCP_MASK;
- vlan.vlan_tci |= vlan_tci;
- /* Push VLAN command will use this value */
+ /* of_vlan_push action handled this action */
+ assert(action_flags & MLX5_FLOW_ACTION_OF_PUSH_VLAN);
break;
case RTE_FLOW_ACTION_TYPE_OF_SET_VLAN_VID:
- if (!vlan_inherited) {
- flow_dev_get_vlan_info_from_items(items, &vlan);
- vlan_inherited = true;
- }
- vlan.vlan_tci &= ~MLX5DV_FLOW_VLAN_VID_MASK;
- vlan.vlan_tci |= rte_be_to_cpu_16
- (((const struct rte_flow_action_of_set_vlan_vid *)
- actions->conf)->vlan_vid);
- /* Push VLAN command will use this value */
- if (mlx5_flow_find_action
- (actions,
- RTE_FLOW_ACTION_TYPE_OF_PUSH_VLAN))
+ if (action_flags & MLX5_FLOW_ACTION_OF_PUSH_VLAN)
break;
+ flow_dev_get_vlan_info_from_items(items, &vlan);
+ mlx5_update_vlan_vid_pcp(actions, &vlan);
/* If no VLAN push - this is a modify header action */
if (flow_dv_convert_action_modify_vlan_vid
(&res, actions, error))
--
2.24.0.rc0.3.g12a4aeaad8
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