Hi Jay,

-----Original Message-----
From: Jayatheerthan, Jay <redacted>
Sent: 04 October 2021 22:49
To: Kundapura, Ganapati <redacted>;
jerinjacobk@gmail.com; dev@dpdk.org
Subject: RE: [PATCH v4] eventdev/rx-adapter: fix segfault in queue conf get

quoted

-----Original Message-----
From: Kundapura, Ganapati <redacted>
Sent: Friday, October 1, 2021 11:00 AM
To: jerinjacobk@gmail.com; dev@dpdk.org
Cc: Jayatheerthan, Jay <redacted>
Subject: [PATCH v4] eventdev/rx-adapter: fix segfault in queue conf
get

rte_event_eth_rx_adapter_queue_conf_get() segfaults if called without
queue added to the Rx adapter.

Added check to no queues in Rx adapter and error out on being called
with no queue in Rx adapter.

Added test case to call queue conf get without queues in Rx adapter.

Fixes: b36879759b7f3ce ("eventdev/rx_adapter: support Rx queue config
get")
Signed-off-by: Ganapati Kundapura <redacted>

---
v4:
* Fixed checkpatch warning

v3:
* Added fixes line

v2:
* Corrected typo in the comment
---

diff --git a/app/test/test_event_eth_rx_adapter.c

b/app/test/test_event_eth_rx_adapter.c
index 13664a3..d0dc552 100644

--- a/app/test/test_event_eth_rx_adapter.c
+++ b/app/test/test_event_eth_rx_adapter.c

@@ -751,20 +751,48 @@ static int
 adapter_queue_conf(void)
 {
 	int err;
-	struct rte_event_eth_rx_adapter_queue_conf queue_conf;
+	struct rte_event_eth_rx_adapter_queue_conf queue_conf = {0};

-	err = rte_event_eth_rx_adapter_queue_conf_get(TEST_INST_ID,

TEST_DEV_ID,

quoted

+	/* Case 1: queue conf get without any queues in Rx adapter */
+	err = rte_event_eth_rx_adapter_queue_conf_get(TEST_INST_ID,
+						      TEST_ETHDEV_ID,
+						      0, &queue_conf);
+	TEST_ASSERT(err == -EINVAL, "Expected -EINVAL got %d", err);
+
+	/* Add queue to Rx adapter */
+	queue_conf.ev.queue_id = 0;
+	queue_conf.ev.sched_type = RTE_SCHED_TYPE_ATOMIC;
+	queue_conf.ev.priority = RTE_EVENT_DEV_PRIORITY_NORMAL;
+
+	err = rte_event_eth_rx_adapter_queue_add(TEST_INST_ID,
+						 TEST_ETHDEV_ID,
+						 0, &queue_conf);
+	TEST_ASSERT(err == 0, "Expected 0 got %d", err);
+
+	/* Case 2: queue conf get with queue added to Rx adapter */
+	err = rte_event_eth_rx_adapter_queue_conf_get(TEST_INST_ID,
+						      TEST_ETHDEV_ID,
 						      0, &queue_conf);
 	TEST_ASSERT(err == 0, "Expected 0 got %d", err);

-	err = rte_event_eth_rx_adapter_queue_conf_get(TEST_INST_ID,

TEST_DEV_ID,

quoted

+	/* Case 3: queue conf get with invalid rx queue id */
+	err = rte_event_eth_rx_adapter_queue_conf_get(TEST_INST_ID,
+						      TEST_ETHDEV_ID,
 						      -1, &queue_conf);

rx_queue_id param is uint16_t. Would using non-configured queue id (for
e.g. rx_queue_id = 2) suffice instead of using -1 ?

When -1 is promoted/demoted to uint16_t, it'll be converted to large value i.e UINT_MAX and guaranteed
to be invalid rx queue id and it's future proof.
In case, some queues are added in that test case in future, this invalid rx_queue_id also needs to be updated.

Yes, for this case rx_queue_id=2 can be used, but it's not future proof.

quoted

 	TEST_ASSERT(err == -EINVAL, "Expected -EINVAL got %d", err);

-	err = rte_event_eth_rx_adapter_queue_conf_get(TEST_INST_ID,

TEST_DEV_ID,

quoted

+	/* Case 4: queue conf get with NULL queue conf struct */
+	err = rte_event_eth_rx_adapter_queue_conf_get(TEST_INST_ID,
+						      TEST_ETHDEV_ID,
 						      0, NULL);
 	TEST_ASSERT(err == -EINVAL, "Expected -EINVAL got %d", err);

+	/* Delete queue from the Rx adapter */
+	err = rte_event_eth_rx_adapter_queue_del(TEST_INST_ID,
+						 TEST_ETHDEV_ID,
+						 0);
+	TEST_ASSERT(err == 0, "Expected 0 got %d", err);
+
 	return TEST_SUCCESS;
 }

diff --git a/lib/eventdev/rte_event_eth_rx_adapter.c

b/lib/eventdev/rte_event_eth_rx_adapter.c
index 10491ca..2a84490 100644

--- a/lib/eventdev/rte_event_eth_rx_adapter.c
+++ b/lib/eventdev/rte_event_eth_rx_adapter.c

@@ -2844,12 +2844,13 @@

rte_event_eth_rx_adapter_queue_conf_get(uint8_t id,

quoted

 		return -EINVAL;

 	dev_info = &rx_adapter->eth_devices[eth_dev_id];
-	queue_info = &dev_info->rx_queue[rx_queue_id];
-	if (!queue_info->queue_enabled) {
+	if (dev_info->rx_queue == NULL ||
+	    !dev_info->rx_queue[rx_queue_id].queue_enabled) {
 		RTE_EDEV_LOG_ERR("Rx queue %u not added",

rx_queue_id);

quoted

 		return -EINVAL;
 	}

+	queue_info = &dev_info->rx_queue[rx_queue_id];
 	qi_ev = (struct rte_event *)&queue_info->event;

 	memset(queue_conf, 0, sizeof(*queue_conf));
--
2.6.4