[dpdk-dev] [PATCH 11/13] net/bnxt: fix bug with duplicate pattern for 5tuple filter

[Ajit Khaparde]

From: Somnath Kotur <somnath.kotur at broadcom.com>

When user re-issues same 5 tuple filter pattern cmd with different
destination queue, it would flag it as an existing match.
However, when deletion on this filter was attempted, it would crash
as the 'vnic' from which the filter was being removed from would be
different.  Fix by updating the filter in the scenario where there
is a pattern match and only the destination queue varies.

Signed-off-by: Somnath Kotur <somnath.kotur at broadcom.com>
Signed-off-by: Ajit Khaparde <ajit.khaparde at broadcom.com>
---
 drivers/net/bnxt/bnxt_ethdev.c | 32 +++++++++++++++++++++++---------
 1 file changed, 23 insertions(+), 9 deletions(-)

diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethdev.c
index 049d98b1d..41b23cc4f 100644
--- a/drivers/net/bnxt/bnxt_ethdev.c
+++ b/drivers/net/bnxt/bnxt_ethdev.c
@@ -1962,7 +1962,8 @@ parse_ntuple_filter(struct bnxt *bp,
 
 static struct bnxt_filter_info*
 bnxt_match_ntuple_filter(struct bnxt *bp,
-			 struct bnxt_filter_info *bfilter)
+			 struct bnxt_filter_info *bfilter,
+			 struct bnxt_vnic_info **mvnic)
 {
 	struct bnxt_filter_info *mfilter = NULL;
 	int i;
@@ -1981,8 +1982,11 @@ bnxt_match_ntuple_filter(struct bnxt *bp,
 			    bfilter->dst_port == mfilter->dst_port &&
 			    bfilter->dst_port_mask == mfilter->dst_port_mask &&
 			    bfilter->flags == mfilter->flags &&
-			    bfilter->enables == mfilter->enables)
+			    bfilter->enables == mfilter->enables) {
+				if (mvnic)
+					*mvnic = vnic;
 				return mfilter;
+			}
 		}
 	}
 	return NULL;
@@ -1994,7 +1998,7 @@ bnxt_cfg_ntuple_filter(struct bnxt *bp,
 		       enum rte_filter_op filter_op)
 {
 	struct bnxt_filter_info *bfilter, *mfilter, *filter1;
-	struct bnxt_vnic_info *vnic, *vnic0;
+	struct bnxt_vnic_info *vnic, *vnic0, *mvnic;
 	int ret;
 
 	if (nfilter->flags != RTE_5TUPLE_FLAGS) {
@@ -2032,12 +2036,22 @@ bnxt_cfg_ntuple_filter(struct bnxt *bp,
 	bfilter->ethertype = 0x800;
 	bfilter->enables |= NTUPLE_FLTR_ALLOC_INPUT_EN_ETHERTYPE;
 
-	mfilter = bnxt_match_ntuple_filter(bp, bfilter);
+	mfilter = bnxt_match_ntuple_filter(bp, bfilter, &mvnic);
 
-	if (mfilter != NULL && filter_op == RTE_ETH_FILTER_ADD) {
-		RTE_LOG(ERR, PMD, "filter exists.");
+	if (mfilter != NULL && filter_op == RTE_ETH_FILTER_ADD &&
+	    bfilter->dst_id == mfilter->dst_id) {
+		RTE_LOG(ERR, PMD, "filter exists.\n");
 		ret = -EEXIST;
 		goto free_filter;
+	} else if (mfilter != NULL && filter_op == RTE_ETH_FILTER_ADD &&
+		   bfilter->dst_id != mfilter->dst_id) {
+		mfilter->dst_id = vnic->fw_vnic_id;
+		ret = bnxt_hwrm_set_ntuple_filter(bp, mfilter->dst_id, mfilter);
+		STAILQ_REMOVE(&mvnic->filter, mfilter, bnxt_filter_info, next);
+		STAILQ_INSERT_TAIL(&vnic->filter, mfilter, next);
+		RTE_LOG(ERR, PMD, "filter with matching pattern exists.\n");
+		RTE_LOG(ERR, PMD, " Updated it to the new destination queue\n");
+		goto free_filter;
 	}
 	if (mfilter == NULL && filter_op == RTE_ETH_FILTER_DELETE) {
 		RTE_LOG(ERR, PMD, "filter doesn't exist.");
@@ -2059,11 +2073,11 @@ bnxt_cfg_ntuple_filter(struct bnxt *bp,
 		}
 		ret = bnxt_hwrm_clear_ntuple_filter(bp, mfilter);
 
-		STAILQ_REMOVE(&vnic->filter, mfilter, bnxt_filter_info,
-			      next);
+		STAILQ_REMOVE(&vnic->filter, mfilter, bnxt_filter_info, next);
 		bnxt_free_filter(bp, mfilter);
-		bfilter->fw_l2_filter_id = -1;
+		mfilter->fw_l2_filter_id = -1;
 		bnxt_free_filter(bp, bfilter);
+		bfilter->fw_l2_filter_id = -1;
 	}
 
 	return 0;
-- 
2.14.3 (Apple Git-98)