[dpdk-dev] [PATCH v2] ethdev: report error on name truncation

[Nithin Kumar Dabilpuram]

Currently this api doesn't report error if name is
truncated and so user is not sure about uniqueness
of name. This change reports error to help user.

Signed-off-by: Nithin Dabilpuram <ndabilpuram at marvell.com>
---

v2:
Fix issue caused by rebase and also fix log message

 lib/librte_ethdev/rte_ethdev.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c
index 9d5107d..47d4f4a 100644
--- a/lib/librte_ethdev/rte_ethdev.c
+++ b/lib/librte_ethdev/rte_ethdev.c
@@ -3588,9 +3588,16 @@ rte_eth_dma_zone_reserve(const struct rte_eth_dev *dev, const char *ring_name,
 {
 	char z_name[RTE_MEMZONE_NAMESIZE];
 	const struct rte_memzone *mz;
+	int rc;
 
-	snprintf(z_name, sizeof(z_name), "eth_p%d_q%d_%s",
-		 dev->data->port_id, queue_id, ring_name);
+	rc = snprintf(z_name, sizeof(z_name), "eth_p%d_q%d_%s",
+		      dev->data->port_id, queue_id, ring_name);
+
+	if (rc >= RTE_MEMZONE_NAMESIZE) {
+		RTE_ETHDEV_LOG(ERR, "truncated name");
+		rte_errno = ENAMETOOLONG;
+		return NULL;
+	}
 
 	mz = rte_memzone_lookup(z_name);
 	if (mz)
-- 
2.8.4