[dpdk-dev] [PATCH v2] net/ixgbe: remove tpid check for fdir filter

[Wei Zhao <wei.zhao1@intel.com>]

DPDK community has several emails discussion on this topic,
these mails link is bellow:
http://dpdk.org/ml/archives/dev/2017-March/060379.html,
http://dpdk.org/ml/archives/dev/2017-March/060295.html,
items like VLAN can already have several valid "types"
(0x88a8, 0x8100, 0x9100), and who knows what will come up
in the future.And ixgbe_flow just ignores the types when do
filter configuration. So it may be reasonable to delete the
related tpid check process.
Also add some more comment log on stack explanation.

v2:
-add dpdk community mail link for this topic.

Fixes: 11777435c72 ("net/ixgbe: parse flow director filter")

Signed-off-by: Wei Zhao <wei.zhao1@intel.com>
---
 drivers/net/ixgbe/ixgbe_flow.c | 33 ++-------------------------------
 1 file changed, 2 insertions(+), 31 deletions(-)

diff --git a/drivers/net/ixgbe/ixgbe_flow.c b/drivers/net/ixgbe/ixgbe_flow.c
index 3b037f1..7ce740e 100644
--- a/drivers/net/ixgbe/ixgbe_flow.c
+++ b/drivers/net/ixgbe/ixgbe_flow.c
@@ -1401,7 +1401,6 @@ ixgbe_parse_fdir_act_attr(const struct rte_flow_attr *attr,
 		{0xAC, 0x7B, 0xA1,	{0xFF, 0xFF, 0xFF,
 		0x2C, 0x6D, 0x36}	0xFF, 0xFF, 0xFF}
  * MAC VLAN	tci	0x2016		0xEFFF
- *		tpid	0x8100		0xFFFF
  * END
  * Other members in mask and spec should set to 0x00.
  * Item->last should be NULL.
@@ -1599,23 +1598,8 @@ ixgbe_parse_fdir_filter_normal(const struct rte_flow_attr *attr,
 		vlan_spec = (const struct rte_flow_item_vlan *)item->spec;
 		vlan_mask = (const struct rte_flow_item_vlan *)item->mask;
 
-		if (vlan_spec->tpid != rte_cpu_to_be_16(ETHER_TYPE_VLAN)) {
-			memset(rule, 0, sizeof(struct ixgbe_fdir_rule));
-			rte_flow_error_set(error, EINVAL,
-				RTE_FLOW_ERROR_TYPE_ITEM,
-				item, "Not supported by fdir filter");
-			return -rte_errno;
-		}
-
 		rule->ixgbe_fdir.formatted.vlan_id = vlan_spec->tci;
 
-		if (vlan_mask->tpid != (uint16_t)~0U) {
-			memset(rule, 0, sizeof(struct ixgbe_fdir_rule));
-			rte_flow_error_set(error, EINVAL,
-				RTE_FLOW_ERROR_TYPE_ITEM,
-				item, "Not supported by fdir filter");
-			return -rte_errno;
-		}
 		rule->mask.vlan_tci_mask = vlan_mask->tci;
 		rule->mask.vlan_tci_mask &= rte_cpu_to_be_16(0xEFFF);
 		/* More than one tags are not supported. */
@@ -1910,6 +1894,7 @@ ixgbe_parse_fdir_filter_normal(const struct rte_flow_attr *attr,
  * IPV4/IPV6	NULL			NULL
  * UDP		NULL			NULL
  * VxLAN	vni{0x00, 0x32, 0x54}	{0xFF, 0xFF, 0xFF}
+ * MAC VLAN	tci	0x2016		0xEFFF
  * END
  * NEGRV pattern example:
  * ITEM		Spec			Mask
@@ -1917,6 +1902,7 @@ ixgbe_parse_fdir_filter_normal(const struct rte_flow_attr *attr,
  * IPV4/IPV6	NULL			NULL
  * NVGRE	protocol	0x6558	0xFFFF
  *		tni{0x00, 0x32, 0x54}	{0xFF, 0xFF, 0xFF}
+ * MAC VLAN	tci	0x2016		0xEFFF
  * END
  * other members in mask and spec should set to 0x00.
  * item->last should be NULL.
@@ -2343,23 +2329,8 @@ ixgbe_parse_fdir_filter_tunnel(const struct rte_flow_attr *attr,
 		vlan_spec = (const struct rte_flow_item_vlan *)item->spec;
 		vlan_mask = (const struct rte_flow_item_vlan *)item->mask;
 
-		if (vlan_spec->tpid != rte_cpu_to_be_16(ETHER_TYPE_VLAN)) {
-			memset(rule, 0, sizeof(struct ixgbe_fdir_rule));
-			rte_flow_error_set(error, EINVAL,
-				RTE_FLOW_ERROR_TYPE_ITEM,
-				item, "Not supported by fdir filter");
-			return -rte_errno;
-		}
-
 		rule->ixgbe_fdir.formatted.vlan_id = vlan_spec->tci;
 
-		if (vlan_mask->tpid != (uint16_t)~0U) {
-			memset(rule, 0, sizeof(struct ixgbe_fdir_rule));
-			rte_flow_error_set(error, EINVAL,
-				RTE_FLOW_ERROR_TYPE_ITEM,
-				item, "Not supported by fdir filter");
-			return -rte_errno;
-		}
 		rule->mask.vlan_tci_mask = vlan_mask->tci;
 		rule->mask.vlan_tci_mask &= rte_cpu_to_be_16(0xEFFF);
 		/* More than one tags are not supported. */
-- 
2.9.3