[dpdk-stable] [[PATCH 19.11 2/2] net/hns3: fix xstats with id and names

["Min Hu (Connor)" <humin29@huawei.com>]

From: Huisong Li <lihuisong@huawei.com>

[ upstream commit 3213d584b698f41dbef14599a41ab0a7a78739b4 ]

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
---
 drivers/net/hns3/hns3_stats.c | 24 ++++++++++++++++++++++--
 drivers/net/hns3/hns3_stats.h |  4 ++--
 2 files changed, 24 insertions(+), 4 deletions(-)

diff --git a/drivers/net/hns3/hns3_stats.c b/drivers/net/hns3/hns3_stats.c
index 4cf5e8f..571e8b4 100644
--- a/drivers/net/hns3/hns3_stats.c
+++ b/drivers/net/hns3/hns3_stats.c
@@ -754,9 +754,13 @@ hns3_dev_xstats_get_by_id(struct rte_eth_dev *dev, const uint64_t *ids,
 	char *addr;
 	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) {
@@ -804,6 +808,15 @@ hns3_dev_xstats_get_by_id(struct rte_eth_dev *dev, const uint64_t *ids,
 		}
 	}
 
+	if (ids == NULL && values != NULL) {
+		for (i = 0; i < cnt_stats; i++)
+			memcpy(&values[i], &values_copy[i], 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[%d] (%" PRIx64 ") is invalid, "
@@ -852,9 +865,16 @@ hns3_dev_xstats_get_names_by_id(struct rte_eth_dev *dev,
 	uint16_t i, j;
 	uint64_t len;
 
-	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);
 	xstats_names_copy = rte_zmalloc("hns3_xstats_names", len, 0);
 	if (xstats_names_copy == NULL) {
diff --git a/drivers/net/hns3/hns3_stats.h b/drivers/net/hns3/hns3_stats.h
index 365bae0..34c76be 100644
--- a/drivers/net/hns3/hns3_stats.h
+++ b/drivers/net/hns3/hns3_stats.h
@@ -141,8 +141,8 @@ int hns3_dev_xstats_get_names(__rte_unused struct rte_eth_dev *dev,
 			      struct rte_eth_xstat_name *xstats_names,
 			      __rte_unused unsigned int size);
 int hns3_dev_xstats_get_by_id(struct rte_eth_dev *dev,
-			      __rte_unused const uint64_t *ids,
-			      __rte_unused uint64_t *values,
+			      const uint64_t *ids,
+			      uint64_t *values,
 			      uint32_t size);
 int hns3_dev_xstats_get_names_by_id(struct rte_eth_dev *dev,
 				    struct rte_eth_xstat_name *xstats_names,
-- 
2.7.4