net/bnxt: check duplicate queue IDs

[ upstream commit 447a072 ]

Currently driver does not have a check for duplicate queue ids.
User must either specify all Rx queues created or no queues in the
flow create command. Repeating the queue index is invalid.

Also, moved the check for invalid queue to the beginning of the function.

Fixes: 239695f ("net/bnxt: enhance RSS action support")

Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>

drivers/net/bnxt/bnxt_flow.c

@@ -1115,7 +1115,7 @@ bnxt_vnic_rss_cfg_update(struct bnxt *bp,
 			 struct rte_flow_error *error)
 {
 	const struct rte_flow_action_rss *rss;
-	unsigned int rss_idx, i;
+	unsigned int rss_idx, i, j;
 	uint16_t hash_type;
 	uint64_t types;
 	int rc;
@@ -1133,6 +1133,37 @@ bnxt_vnic_rss_cfg_update(struct bnxt *bp,
 		goto ret;
 	}
 
+	/* Validate Rx queues */
+	for (i = 0; i < rss->queue_num; i++) {
+		PMD_DRV_LOG(DEBUG, "RSS action Queue %d\n", rss->queue[i]);
+
+		if (rss->queue[i] >= bp->rx_nr_rings ||
+		    !bp->rx_queues[rss->queue[i]]) {
+			rte_flow_error_set(error,
+					   EINVAL,
+					   RTE_FLOW_ERROR_TYPE_ACTION,
+					   act,
+					   "Invalid queue ID for RSS");
+			rc = -rte_errno;
+			goto ret;
+		}
+	}
+
+	/* Duplicate queue ids are not supported. */
+	for (i = 0; i < rss->queue_num; i++) {
+		for (j = i + 1; j < rss->queue_num; j++) {
+			if (rss->queue[i] == rss->queue[j]) {
+				rte_flow_error_set(error,
+						   EINVAL,
+						   RTE_FLOW_ERROR_TYPE_ACTION,
+						   act,
+						   "Duplicate queue ID for RSS");
+				rc = -rte_errno;
+				goto ret;
+			}
+		}
+	}
+
 	/* Currently only Toeplitz hash is supported. */
 	if (rss->func != RTE_ETH_HASH_FUNCTION_DEFAULT &&
 	    rss->func != RTE_ETH_HASH_FUNCTION_TOEPLITZ) {
@@ -1200,22 +1231,6 @@ bnxt_vnic_rss_cfg_update(struct bnxt *bp,
 	if (rss->queue_num == 0)
 		goto skip_rss_table;
 
-	/* Validate Rx queues */
-	for (i = 0; i < rss->queue_num; i++) {
-		PMD_DRV_LOG(DEBUG, "RSS action Queue %d\n", rss->queue[i]);
-
-		if (rss->queue[i] >= bp->rx_nr_rings ||
-		    !bp->rx_queues[rss->queue[i]]) {
-			rte_flow_error_set(error,
-					   EINVAL,
-					   RTE_FLOW_ERROR_TYPE_ACTION,
-					   act,
-					   "Invalid queue ID for RSS");
-			rc = -rte_errno;
-			goto ret;
-		}
-	}
-
 	/* Prepare the indirection table */
 	for (rss_idx = 0; rss_idx < HW_HASH_INDEX_SIZE; rss_idx++) {
 		struct bnxt_rx_queue *rxq;