[PATCH v3 2/2] crypto/ipsec_mb: fix QP release in secondary

[Yang Ming]

When a secondary process tries to release a queue pair (QP) that
does not belong to it, error logs occur:
CRYPTODEV: ipsec_mb_ipc_request() line 373: Unable to release
qp_id=0
EAL: Message data is too long
EAL: Fail to handle message: ipsec_mb_mp_msg
EAL: Fail to recv reply for request /tmp/dpdk/l2hi/mp_socket:
ipsec_mb_mp_msg

>From the code path, cryptodev->data is allocated in the primary
via rte_cryptodev_data_alloc() (inside
ipsec_mb_create-->rte_cryptodev_pmd_create
-->rte_cryptodev_pmd_allocate-->rte_cryptodev_data_alloc).
This memory is placed in a shared memzone
(rte_cryptodev_data_%u), so both primary and secondary processes
reference the same cryptodev->data, including nb_queue_pairs and
queue_pairs[].

As a result, when the secondary process exits, ipsec_mb_remove()
is called (inside
rte_eal_cleanup-->eal_bus_cleanup-->vdev_cleanup
-->rte_vdev_driver-->ipsec_mb_remove-->ipsec_mb_qp_release
-->ipsec_mb_secondary_qp_op) and it loops through all queue
pairs using:
for (qp_id = 0; qp_id < cryptodev->data->nb_queue_pairs; qp_id++)
     ipsec_mb_qp_release(cryptodev, qp_id);

This causes the secondary to attempt releasing queue pairs it
doesn't own, triggering the error logs mentioned above.

This patch ensures that a secondary process only frees a QP if
it actually owns it, preventing conflicts and resolving the
issue.

Fixes: b35848bc01f6 ("crypto/ipsec_mb: add multi-process IPC request handler")
Cc: kai.ji at intel.com
Cc: stable at dpdk.org

Signed-off-by: Yang Ming <mosesyyoung at gmail.com>
---
 drivers/crypto/ipsec_mb/ipsec_mb_ops.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/crypto/ipsec_mb/ipsec_mb_ops.c b/drivers/crypto/ipsec_mb/ipsec_mb_ops.c
index 910efb1a97..50ee140ccd 100644
--- a/drivers/crypto/ipsec_mb/ipsec_mb_ops.c
+++ b/drivers/crypto/ipsec_mb/ipsec_mb_ops.c
@@ -138,6 +138,7 @@ int
 ipsec_mb_qp_release(struct rte_cryptodev *dev, uint16_t qp_id)
 {
 	struct ipsec_mb_qp *qp = dev->data->queue_pairs[qp_id];
+	uint16_t process_id = (uint16_t)getpid();
 
 	if (!qp)
 		return 0;
@@ -152,8 +153,10 @@ ipsec_mb_qp_release(struct rte_cryptodev *dev, uint16_t qp_id)
 		rte_free(qp);
 		dev->data->queue_pairs[qp_id] = NULL;
 	} else { /* secondary process */
-		return ipsec_mb_secondary_qp_op(dev->data->dev_id, qp_id,
-					NULL, 0, RTE_IPSEC_MB_MP_REQ_QP_FREE);
+		if (qp->qp_used_by_pid == process_id)
+			return ipsec_mb_secondary_qp_op(dev->data->dev_id,
+						qp_id, NULL, 0,
+						RTE_IPSEC_MB_MP_REQ_QP_FREE);
 	}
 	return 0;
 }
-- 
2.49.0.windows.1