[PATCH] net/bonding: fix slaves initializing on mtu setting

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

From: Wan Junjie <wanjunjie@bytedance.com>

If a initial process for the bonding device is like:
rte_eth_dev_configure
rte_eth_dev_set_mtu
queue setup and start, etc.

Pass the vdev args to application, and init bonding device only.
-a 0000:af:00.0 --vdev="net_bonding0,mode=2,slave=0000:af:00.0"

It will fail and compain for the slave device
"Port 0 must be configured before MTU set"

Test can be reproduced with ovs.

Fixes: b26bee1 ("ethdev: forbid MTU set before device configure")

Signed-off-by: Wan Junjie <wanjunjie@bytedance.com>
---
 app/test/test_link_bonding.c           |  4 +++
 app/test/test_link_bonding_rssconf.c   |  4 +++
 drivers/net/bonding/eth_bond_private.h |  4 +++
 drivers/net/bonding/rte_eth_bond_api.c |  6 ++++
 drivers/net/bonding/rte_eth_bond_pmd.c | 43 ++++++++++++++++++++++----
 5 files changed, 55 insertions(+), 6 deletions(-)

diff --git a/app/test/test_link_bonding.c b/app/test/test_link_bonding.c
index dc6fc46b9c..12c50ef393 100644
--- a/app/test/test_link_bonding.c
+++ b/app/test/test_link_bonding.c
@@ -181,6 +181,10 @@ configure_ethdev(uint16_t port_id, uint8_t start, uint8_t en_isr)
 			test_params->nb_tx_q, &default_pmd_conf),
 			"rte_eth_dev_configure for port %d failed", port_id);
 
+	int ret = rte_eth_dev_set_mtu(port_id, 1550);
+	RTE_TEST_ASSERT(ret == 0 || ret == -ENOTSUP,
+			"rte_eth_dev_set_mtu for port %d failed", port_id);
+
 	for (q_id = 0; q_id < test_params->nb_rx_q; q_id++)
 		TEST_ASSERT_SUCCESS(rte_eth_rx_queue_setup(port_id, q_id, RX_RING_SIZE,
 				rte_eth_dev_socket_id(port_id), &rx_conf_default,
diff --git a/app/test/test_link_bonding_rssconf.c b/app/test/test_link_bonding_rssconf.c
index f9eae93973..7228965ced 100644
--- a/app/test/test_link_bonding_rssconf.c
+++ b/app/test/test_link_bonding_rssconf.c
@@ -128,6 +128,10 @@ configure_ethdev(uint16_t port_id, struct rte_eth_conf *eth_conf,
 			RXTX_QUEUE_COUNT, eth_conf) == 0, "Failed to configure device %u",
 			port_id);
 
+	int ret = rte_eth_dev_set_mtu(port_id, 1550);
+	RTE_TEST_ASSERT(ret == 0 || ret == -ENOTSUP,
+			"rte_eth_dev_set_mtu for port %d failed", port_id);
+
 	for (rxq = 0; rxq < RXTX_QUEUE_COUNT; rxq++) {
 		TEST_ASSERT(rte_eth_rx_queue_setup(port_id, rxq, RXTX_RING_SIZE,
 				rte_eth_dev_socket_id(port_id), NULL,
diff --git a/drivers/net/bonding/eth_bond_private.h b/drivers/net/bonding/eth_bond_private.h
index 156335c425..8222e3cd38 100644
--- a/drivers/net/bonding/eth_bond_private.h
+++ b/drivers/net/bonding/eth_bond_private.h
@@ -246,6 +246,10 @@ int
 slave_configure(struct rte_eth_dev *bonded_eth_dev,
 		struct rte_eth_dev *slave_eth_dev);
 
+int
+slave_start(struct rte_eth_dev *bonded_eth_dev,
+		struct rte_eth_dev *slave_eth_dev);
+
 void
 slave_remove(struct bond_dev_private *internals,
 		struct rte_eth_dev *slave_eth_dev);
diff --git a/drivers/net/bonding/rte_eth_bond_api.c b/drivers/net/bonding/rte_eth_bond_api.c
index b78867b125..4ac191c468 100644
--- a/drivers/net/bonding/rte_eth_bond_api.c
+++ b/drivers/net/bonding/rte_eth_bond_api.c
@@ -566,6 +566,12 @@ __eth_bond_slave_add_lock_free(uint16_t bonded_port_id, uint16_t slave_port_id)
 					slave_port_id);
 			return -1;
 		}
+		if (slave_start(bonded_eth_dev, slave_eth_dev) != 0) {
+			internals->slave_count--;
+			RTE_BOND_LOG(ERR, "rte_bond_slaves_start: port=%d",
+					slave_port_id);
+			return -1;
+		}
 	}
 
 	/* Update all slave devices MACs */
diff --git a/drivers/net/bonding/rte_eth_bond_pmd.c b/drivers/net/bonding/rte_eth_bond_pmd.c
index bfa931098e..58dad0a0e3 100644
--- a/drivers/net/bonding/rte_eth_bond_pmd.c
+++ b/drivers/net/bonding/rte_eth_bond_pmd.c
@@ -1678,14 +1678,10 @@ int
 slave_configure(struct rte_eth_dev *bonded_eth_dev,
 		struct rte_eth_dev *slave_eth_dev)
 {
-	struct bond_rx_queue *bd_rx_q;
-	struct bond_tx_queue *bd_tx_q;
 	uint16_t nb_rx_queues;
 	uint16_t nb_tx_queues;
 
 	int errval;
-	uint16_t q_id;
-	struct rte_flow_error flow_error;
 
 	struct bond_dev_private *internals = bonded_eth_dev->data->dev_private;
 
@@ -1758,6 +1754,19 @@ slave_configure(struct rte_eth_dev *bonded_eth_dev,
 				slave_eth_dev->data->port_id, errval);
 		return errval;
 	}
+	return 0;
+}
+
+int
+slave_start(struct rte_eth_dev *bonded_eth_dev,
+		struct rte_eth_dev *slave_eth_dev)
+{
+	int errval = 0;
+	struct bond_rx_queue *bd_rx_q;
+	struct bond_tx_queue *bd_tx_q;
+	uint16_t q_id;
+	struct rte_flow_error flow_error;
+	struct bond_dev_private *internals = bonded_eth_dev->data->dev_private;
 
 	/* Setup Rx Queues */
 	for (q_id = 0; q_id < bonded_eth_dev->data->nb_rx_queues; q_id++) {
@@ -1806,10 +1815,13 @@ slave_configure(struct rte_eth_dev *bonded_eth_dev,
 			return errval;
 		}
 
-		if (internals->mode4.dedicated_queues.flow[slave_eth_dev->data->port_id] != NULL)
-			rte_flow_destroy(slave_eth_dev->data->port_id,
+		if (internals->mode4.dedicated_queues.flow[slave_eth_dev->data->port_id] != NULL) {
+			errval = rte_flow_destroy(slave_eth_dev->data->port_id,
 					internals->mode4.dedicated_queues.flow[slave_eth_dev->data->port_id],
 					&flow_error);
+			RTE_BOND_LOG(ERR, "bond_ethdev_8023ad_flow_destroy: port=%d, err (%d)",
+				slave_eth_dev->data->port_id, errval);
+		}
 
 		errval = bond_ethdev_8023ad_flow_set(bonded_eth_dev,
 				slave_eth_dev->data->port_id);
@@ -2001,6 +2013,13 @@ bond_ethdev_start(struct rte_eth_dev *eth_dev)
 				internals->slaves[i].port_id);
 			goto out_err;
 		}
+		if (slave_start(eth_dev, slave_ethdev) != 0) {
+			RTE_BOND_LOG(ERR,
+				"bonded port (%d) failed to start slave device (%d)",
+				eth_dev->data->port_id,
+				internals->slaves[i].port_id);
+			goto out_err;
+		}
 		/* We will need to poll for link status if any slave doesn't
 		 * support interrupts
 		 */
@@ -3847,6 +3866,18 @@ bond_ethdev_configure(struct rte_eth_dev *dev)
 		return -1;
 	}
 
+	/* configure slaves so we can pass mtu setting */
+	for (i = 0; i < internals->slave_count; i++) {
+		struct rte_eth_dev *slave_ethdev =
+				&(rte_eth_devices[internals->slaves[i].port_id]);
+		if (slave_configure(dev, slave_ethdev) != 0) {
+			RTE_BOND_LOG(ERR,
+				"bonded port (%d) failed to configure slave device (%d)",
+				dev->data->port_id,
+				internals->slaves[i].port_id);
+			return -1;
+		}
+	}
 	return 0;
 }
 
-- 
2.33.0