[dpdk-dev] [PATCH v2 2/2] net/bonding: fix MAC address when one port resets

[Wei Hu (Xavier)]

From: "Wei Hu (Xavier)" <xavier.huwei at huawei.com>

Currently, based on a active-backup bond device, in the following 2 cases:
1) The primary port resets. The link status of the primary port changes
   from up to down.
2) When switching the active port, one slave port resets at the same time.
one slave port changes to the primary port, but the new primary port's MAC
address probably cannot change to the bond device's MAC address. And we
can't continue receive packets whose destination MAC addresses are the same
as the bond devices's MAC address.

The current bonding PMD driver call mac_address_slaves_update function to
modify the MAC address of all slaves devices. In mac_address_slaves_update
function, the rte_eth_dev_default_mac_addr_set API function is called to
set the MAC address of the slave devices in turn in the for loop statement.

When one port reset, calling rte_eth_dev_default_mac_addr_set API fails
because the firmware will not respond to the commands from the driver,
and exit the loop, so other slave devices cannot continue to update the
MAC address.

This patch fixes the issue by avoid exiting the loop when calling
rte_eth_dev_default_mac_addr_set fails.

Fixes: 2efb58cbab6e ("bond: new link bonding library")
Cc: stable at dpdk.org

Signed-off-by: Hongbo Zheng <zhenghongbo3 at huawei.com>
Signed-off-by: Wei Hu (Xavier) <xavier.huwei at huawei.com>
Signed-off-by: Chunsong Feng <fengchunsong at huawei.com>
Signed-off-by: Xuan Li <lixuan47 at hisilicon.com>
---
v1 -> v2:
	Ignore the failure when updating salves's MAC address in the
	mac_address_slaves_update function, because it doesn't affect
	the bond's functional characteristics. The related link about
	the discussion:
	http://patches.dpdk.org/patch/66033/
---
 drivers/net/bonding/rte_eth_bond_pmd.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/net/bonding/rte_eth_bond_pmd.c b/drivers/net/bonding/rte_eth_bond_pmd.c
index ddae3518c..01c0f6eb1 100644
--- a/drivers/net/bonding/rte_eth_bond_pmd.c
+++ b/drivers/net/bonding/rte_eth_bond_pmd.c
@@ -1502,6 +1502,7 @@ int
 mac_address_slaves_update(struct rte_eth_dev *bonded_eth_dev)
 {
 	struct bond_dev_private *internals = bonded_eth_dev->data->dev_private;
+	bool setted;
 	int i;
 
 	/* Update slave devices MAC addresses */
@@ -1529,6 +1530,7 @@ mac_address_slaves_update(struct rte_eth_dev *bonded_eth_dev)
 	case BONDING_MODE_TLB:
 	case BONDING_MODE_ALB:
 	default:
+		setted = true;
 		for (i = 0; i < internals->slave_count; i++) {
 			if (internals->slaves[i].port_id ==
 					internals->current_primary_port) {
@@ -1537,7 +1539,7 @@ mac_address_slaves_update(struct rte_eth_dev *bonded_eth_dev)
 						bonded_eth_dev->data->mac_addrs)) {
 					RTE_BOND_LOG(ERR, "Failed to update port Id %d MAC address",
 							internals->current_primary_port);
-					return -1;
+					setted = false;
 				}
 			} else {
 				if (rte_eth_dev_default_mac_addr_set(
@@ -1545,10 +1547,11 @@ mac_address_slaves_update(struct rte_eth_dev *bonded_eth_dev)
 						&internals->slaves[i].persisted_mac_addr)) {
 					RTE_BOND_LOG(ERR, "Failed to update port Id %d MAC address",
 							internals->slaves[i].port_id);
-					return -1;
 				}
 			}
 		}
+		if (!setted)
+			return -1;
 	}
 
 	return 0;
-- 
2.23.0