[PATCH V2 09/10] net/hns3: fix bad memory structure conversion

[Dongdong Liu <liudongdong3@huawei.com>]

From: Huisong Li <lihuisong@huawei.com>

When the type in 'struct rte_flow_action' is RTE_FLOW_ACTION_TYPE_RSS, the
'conf' pointer references the 'struct rte_flow_action_rss' instead of the
'struct hns3_rss_conf' in driver. But driver uses 'struct hns3_rss_conf' to
convert this 'conf' pointer to get RSS action configuration.

In addition, RSS filter configuration is directly cloned to RSS filter node
instead of coping it after successfully setting to hardware.

Fixes: c37ca66f2b27 ("net/hns3: support RSS")
Cc: stable@dpdk.org

Signed-off-by: Huisong Li <lihuisong@huawei.com>
Signed-off-by: Dongdong Liu <liudongdong3@huawei.com>
---
 drivers/net/hns3/hns3_flow.c | 57 +++++++++++++-----------------------
 1 file changed, 20 insertions(+), 37 deletions(-)

diff --git a/drivers/net/hns3/hns3_flow.c b/drivers/net/hns3/hns3_flow.c
index fbc38dd3d4..307aba75a7 100644
--- a/drivers/net/hns3/hns3_flow.c
+++ b/drivers/net/hns3/hns3_flow.c
@@ -95,8 +95,8 @@ static const struct rte_flow_action *
 hns3_find_rss_general_action(const struct rte_flow_item pattern[],
 			     const struct rte_flow_action actions[])
 {
+	const struct rte_flow_action_rss *rss_act;
 	const struct rte_flow_action *act = NULL;
-	const struct hns3_rss_conf *rss;
 	bool have_eth = false;
 
 	for (; actions->type != RTE_FLOW_ACTION_TYPE_END; actions++) {
@@ -115,8 +115,8 @@ hns3_find_rss_general_action(const struct rte_flow_item pattern[],
 		}
 	}
 
-	rss = act->conf;
-	if (have_eth && rss->conf.queue_num) {
+	rss_act = act->conf;
+	if (have_eth && rss_act->queue_num) {
 		/*
 		 * Pattern have ETH and action's queue_num > 0, indicate this is
 		 * queue region configuration.
@@ -1296,30 +1296,6 @@ hns3_action_rss_same(const struct rte_flow_action_rss *comp,
 			sizeof(*with->queue) * with->queue_num));
 }
 
-static int
-hns3_rss_conf_copy(struct hns3_rss_conf *out,
-		   const struct rte_flow_action_rss *in)
-{
-	if (in->key_len > RTE_DIM(out->key) ||
-	    in->queue_num > RTE_DIM(out->queue))
-		return -EINVAL;
-	if (in->key == NULL && in->key_len)
-		return -EINVAL;
-	out->conf = (struct rte_flow_action_rss) {
-		.func = in->func,
-		.level = in->level,
-		.types = in->types,
-		.key_len = in->key_len,
-		.queue_num = in->queue_num,
-	};
-	out->conf.queue = memcpy(out->queue, in->queue,
-				sizeof(*in->queue) * in->queue_num);
-	if (in->key)
-		out->conf.key = memcpy(out->key, in->key, in->key_len);
-
-	return 0;
-}
-
 static bool
 hns3_rss_input_tuple_supported(struct hns3_hw *hw,
 			       const struct rte_flow_action_rss *rss)
@@ -1733,9 +1709,10 @@ hns3_flow_create_rss_rule(struct rte_eth_dev *dev,
 			  struct rte_flow *flow)
 {
 	struct hns3_hw *hw = HNS3_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+	const struct rte_flow_action_rss *rss_act;
 	struct hns3_rss_conf_ele *rss_filter_ptr;
 	struct hns3_rss_conf_ele *filter_ptr;
-	const struct hns3_rss_conf *rss_conf;
+	struct hns3_rss_conf *new_conf;
 	int ret;
 
 	rss_filter_ptr = rte_zmalloc("hns3 rss filter",
@@ -1745,19 +1722,25 @@ hns3_flow_create_rss_rule(struct rte_eth_dev *dev,
 		return -ENOMEM;
 	}
 
-	/*
-	 * After all the preceding tasks are successfully configured, configure
-	 * rules to the hardware to simplify the rollback of rules in the
-	 * hardware.
-	 */
-	rss_conf = (const struct hns3_rss_conf *)act->conf;
-	ret = hns3_flow_parse_rss(dev, rss_conf, true);
+	rss_act = (const struct rte_flow_action_rss *)act->conf;
+	new_conf = &rss_filter_ptr->filter_info;
+	memcpy(&new_conf->conf, rss_act, sizeof(*rss_act));
+	if (rss_act->queue_num > 0) {
+		memcpy(new_conf->queue, rss_act->queue,
+		       rss_act->queue_num * sizeof(new_conf->queue[0]));
+		new_conf->conf.queue = new_conf->queue;
+	}
+	if (rss_act->key_len > 0) {
+		memcpy(new_conf->key, rss_act->key,
+		       rss_act->key_len * sizeof(new_conf->key[0]));
+		new_conf->conf.key = new_conf->key;
+	}
+
+	ret = hns3_flow_parse_rss(dev, new_conf, true);
 	if (ret != 0) {
 		rte_free(rss_filter_ptr);
 		return ret;
 	}
-
-	hns3_rss_conf_copy(&rss_filter_ptr->filter_info, &rss_conf->conf);
 	rss_filter_ptr->filter_info.valid = true;
 
 	/*
-- 
2.22.0