[dpdk-dev] [PATCH v2 2/6] net/hns3: fix xstats statistics with id and names

[Lijun Ou <oulijun@huawei.com>]

From: Huisong Li <lihuisong@huawei.com>

Currently, validity check for ids and values in the
hns3_dev_xstats_get_by_id API is incorrect, which will
cause a problem. Namely, if the ID range of the xstats
stats item does not include the basic stats item, the
app can not obtain the corresponding xstats statistics
in hns3_dev_xstats_get_by_id.

Similarly, the hns3_dev_xstats_get_names_by_id interface
also has a problem.

Although the input parameter verification code cannot be
executed due to the implementation of the ethdev framework
interface, the driver needs to ensure the correctness of
the input parameters.

Fixes: 8839c5e202f3 ("net/hns3: support device stats")
Cc: stable@dpdk.org

Signed-off-by: Huisong Li <lihuisong@huawei.com>
Signed-off-by: Lijun Ou <oulijun@huawei.com>
---
V1->V2:
-fix ids and values check
-add hns3_dev_xstats_get_names_by_id check
---
 drivers/net/hns3/hns3_stats.c | 24 ++++++++++++++++++++++--
 1 file changed, 22 insertions(+), 2 deletions(-)

diff --git a/drivers/net/hns3/hns3_stats.c b/drivers/net/hns3/hns3_stats.c
index 91168ac..1597af3 100644
--- a/drivers/net/hns3/hns3_stats.c
+++ b/drivers/net/hns3/hns3_stats.c
@@ -933,9 +933,13 @@ hns3_dev_xstats_get_by_id(struct rte_eth_dev *dev, const uint64_t *ids,
 	uint32_t i;
 	int ret;
 
-	if (ids == NULL || size < cnt_stats)
+	if (ids == NULL && values == NULL)
 		return cnt_stats;
 
+	if (ids == NULL)
+		if (size < cnt_stats)
+			return cnt_stats;
+
 	/* Update tqp stats by read register */
 	ret = hns3_update_tqp_stats(hw);
 	if (ret) {
@@ -957,6 +961,15 @@ hns3_dev_xstats_get_by_id(struct rte_eth_dev *dev, const uint64_t *ids,
 		return -EINVAL;
 	}
 
+	if (ids == NULL && values != NULL) {
+		for (i = 0; i < cnt_stats; i++)
+			memcpy(&values[i], &values_copy[i].value,
+			       sizeof(values[i]));
+
+		rte_free(values_copy);
+		return cnt_stats;
+	}
+
 	for (i = 0; i < size; i++) {
 		if (ids[i] >= cnt_stats) {
 			hns3_err(hw, "ids[%u] (%" PRIx64 ") is invalid, "
@@ -1005,9 +1018,16 @@ hns3_dev_xstats_get_names_by_id(struct rte_eth_dev *dev,
 	uint64_t len;
 	uint32_t i;
 
-	if (ids == NULL || xstats_names == NULL)
+	if (xstats_names == NULL)
 		return cnt_stats;
 
+	if (ids == NULL) {
+		if (size < cnt_stats)
+			return cnt_stats;
+
+		return hns3_dev_xstats_get_names(dev, xstats_names, cnt_stats);
+	}
+
 	len = cnt_stats * sizeof(struct rte_eth_xstat_name);
 	names_copy = rte_zmalloc("hns3_xstats_names", len, 0);
 	if (names_copy == NULL) {
-- 
2.7.4