Thread (4 messages) flat view 4 messages, 3 authors, 2012-01-19

Re: [PATCH] bonding: fix enslaving in alb mode when link down

From: Jay Vosburgh <hidden>
Date: 2012-01-19 01:45:28

Jiri Bohac [off-list ref] wrote:
bond_alb_init_slave() is called from bond_enslave() and sets the slave's MAC
address. This is done differently for TLB and ALB modes.
bond->alb_info.rlb_enabled is used to discriminate between the two modes but
this flag may be uninitialized if the slave is being enslaved prior to calling
bond_open() -> bond_alb_initialize() on the master.

It turns out all the callers of alb_set_slave_mac_addr() pass
bond->alb_info.rlb_enabled as the hw parameter.

This patch cleans up the unnecessary parameter of alb_set_slave_mac_addr() and
makes the function decide based on the bonding mode instead, which fixes the
above problem.

Signed-off-by: Jiri Bohac <redacted>
	Looks reasonable.

	-J

Signed-off-by: Jay Vosburgh <redacted>

quoted hunk ↗ jump to hunk
diff --git a/drivers/net/bonding/bond_alb.c b/drivers/net/bonding/bond_alb.c
index 342626f..f820b26 100644
--- a/drivers/net/bonding/bond_alb.c
+++ b/drivers/net/bonding/bond_alb.c
@@ -909,16 +909,12 @@ static void alb_send_learning_packets(struct slave *slave, u8 mac_addr[])
	}
}

-/* hw is a boolean parameter that determines whether we should try and
- * set the hw address of the device as well as the hw address of the
- * net_device
- */
-static int alb_set_slave_mac_addr(struct slave *slave, u8 addr[], int hw)
+static int alb_set_slave_mac_addr(struct slave *slave, u8 addr[])
{
	struct net_device *dev = slave->dev;
	struct sockaddr s_addr;

-	if (!hw) {
+	if (slave->bond->params.mode == BOND_MODE_TLB) {
		memcpy(dev->dev_addr, addr, dev->addr_len);
		return 0;
	}
@@ -948,8 +944,8 @@ static void alb_swap_mac_addr(struct bonding *bond, struct slave *slave1, struct
	u8 tmp_mac_addr[ETH_ALEN];

	memcpy(tmp_mac_addr, slave1->dev->dev_addr, ETH_ALEN);
-	alb_set_slave_mac_addr(slave1, slave2->dev->dev_addr, bond->alb_info.rlb_enabled);
-	alb_set_slave_mac_addr(slave2, tmp_mac_addr, bond->alb_info.rlb_enabled);
+	alb_set_slave_mac_addr(slave1, slave2->dev->dev_addr);
+	alb_set_slave_mac_addr(slave2, tmp_mac_addr);

}
@@ -1096,8 +1092,7 @@ static int alb_handle_addr_collision_on_attach(struct bonding *bond, struct slav
		/* Try setting slave mac to bond address and fall-through
		   to code handling that situation below... */
-		alb_set_slave_mac_addr(slave, bond->dev->dev_addr,
-				       bond->alb_info.rlb_enabled);
+		alb_set_slave_mac_addr(slave, bond->dev->dev_addr);
	}

	/* The slave's address is equal to the address of the bond.
@@ -1133,8 +1128,7 @@ static int alb_handle_addr_collision_on_attach(struct bonding *bond, struct slav
	}

	if (free_mac_slave) {
-		alb_set_slave_mac_addr(slave, free_mac_slave->perm_hwaddr,
-				       bond->alb_info.rlb_enabled);
+		alb_set_slave_mac_addr(slave, free_mac_slave->perm_hwaddr);

		pr_warning("%s: Warning: the hw address of slave %s is in use by the bond; giving it the hw address of %s\n",
			   bond->dev->name, slave->dev->name,
@@ -1491,8 +1485,7 @@ int bond_alb_init_slave(struct bonding *bond, struct slave *slave)
{
	int res;

-	res = alb_set_slave_mac_addr(slave, slave->perm_hwaddr,
-				     bond->alb_info.rlb_enabled);
+	res = alb_set_slave_mac_addr(slave, slave->perm_hwaddr);
	if (res) {
		return res;
	}
@@ -1643,8 +1636,7 @@ void bond_alb_handle_active_change(struct bonding *bond, struct slave *new_slave
		alb_swap_mac_addr(bond, swap_slave, new_slave);
	} else {
		/* set the new_slave to the bond mac address */
-		alb_set_slave_mac_addr(new_slave, bond->dev->dev_addr,
-				       bond->alb_info.rlb_enabled);
+		alb_set_slave_mac_addr(new_slave, bond->dev->dev_addr);
	}

	if (swap_slave) {
@@ -1704,8 +1696,7 @@ int bond_alb_set_mac_address(struct net_device *bond_dev, void *addr)
		alb_swap_mac_addr(bond, swap_slave, bond->curr_active_slave);
		alb_fasten_mac_swap(bond, swap_slave, bond->curr_active_slave);
	} else {
-		alb_set_slave_mac_addr(bond->curr_active_slave, bond_dev->dev_addr,
-				       bond->alb_info.rlb_enabled);
+		alb_set_slave_mac_addr(bond->curr_active_slave, bond_dev->dev_addr);

		read_lock(&bond->lock);
		alb_send_learning_packets(bond->curr_active_slave, bond_dev->dev_addr);
-- 
Jiri Bohac [off-list ref]
SUSE Labs, SUSE CZ
---
	-Jay Vosburgh, IBM Linux Technology Center, fubar@us.ibm.com
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