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bonding: fix enslaving in alb mode when link down 

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.

Reported-by: Narendra K <Narendra_K@Dell.com>
Signed-off-by: Jiri Bohac <jbohac@suse.cz>
Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Bohac 2012-01-18 12:24:54 +00:00 committed by David S. Miller
parent 2b53d07891
commit b924551bed
1 changed files with 9 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
drivers/net/bonding/bond_alb.c
View File

@ -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);