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bonding: add bond_has_slaves() and use it

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Currently we verify if we have slaves by checking if bond->slave_list is
empty. Create a define bond_has_slaves() and use it, a bit more readable
and easier to change in the future.

CC: Jay Vosburgh <fubar@us.ibm.com>
CC: Andy Gospodarek <andy@greyhouse.net>
Signed-off-by: Veaceslav Falico <vfalico@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Veaceslav Falico 2013-09-25 09:20:21 +02:00 committed by David S. Miller
parent b386c58b85
commit 0965a1f3f8
5 changed files with 25 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/bonding/bond_3ad.c
View File

@ -2117,7 +2117,7 @@ void bond_3ad_state_machine_handler(struct work_struct *work)
read_lock(&bond->lock);
//check if there are any slaves
if (list_empty(&bond->slave_list))
if (!bond_has_slaves(bond))
goto re_arm;
// check if agg_select_timer timer after initialize is timed out

8
drivers/net/bonding/bond_alb.c
View File

@ -1178,7 +1178,7 @@ static int alb_handle_addr_collision_on_attach(struct bonding *bond, struct slav
struct slave *tmp_slave1, *free_mac_slave = NULL;
struct list_head *iter;
if (list_empty(&bond->slave_list)) {
if (!bond_has_slaves(bond)) {
/* this is the first slave */
return 0;
}
@ -1469,7 +1469,7 @@ void bond_alb_monitor(struct work_struct *work)
read_lock(&bond->lock);
if (list_empty(&bond->slave_list)) {
if (!bond_has_slaves(bond)) {
bond_info->tx_rebalance_counter = 0;
bond_info->lp_counter = 0;
goto re_arm;
@ -1606,7 +1606,7 @@ int bond_alb_init_slave(struct bonding *bond, struct slave *slave)
*/
void bond_alb_deinit_slave(struct bonding *bond, struct slave *slave)
{
if (!list_empty(&bond->slave_list))
if (bond_has_slaves(bond))
alb_change_hw_addr_on_detach(bond, slave);
tlb_clear_slave(bond, slave, 0);
@ -1676,7 +1676,7 @@ void bond_alb_handle_active_change(struct bonding *bond, struct slave *new_slave
swap_slave = bond->curr_active_slave;
rcu_assign_pointer(bond->curr_active_slave, new_slave);
if (!new_slave || list_empty(&bond->slave_list))
if (!new_slave || !bond_has_slaves(bond))
return;
/* set the new curr_active_slave to the bonds mac address

32
drivers/net/bonding/bond_main.c
View File

@ -391,7 +391,7 @@ static int bond_set_carrier(struct bonding *bond)
struct list_head *iter;
struct slave *slave;
if (list_empty(&bond->slave_list))
if (!bond_has_slaves(bond))
goto down;
if (bond->params.mode == BOND_MODE_8023AD)
@ -1085,7 +1085,7 @@ static netdev_features_t bond_fix_features(struct net_device *dev,
netdev_features_t mask;
struct slave *slave;
if (list_empty(&bond->slave_list)) {
if (!bond_has_slaves(bond)) {
/* Disable adding VLANs to empty bond. But why? --mq */
features |= NETIF_F_VLAN_CHALLENGED;
return features;
@ -1120,7 +1120,7 @@ static void bond_compute_features(struct bonding *bond)
unsigned int gso_max_size = GSO_MAX_SIZE;
u16 gso_max_segs = GSO_MAX_SEGS;
if (list_empty(&bond->slave_list))
if (!bond_has_slaves(bond))
goto done;
bond_for_each_slave(bond, slave, iter) {
@ -1310,7 +1310,7 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
* bond ether type mutual exclusion - don't allow slaves of dissimilar
* ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
*/
if (list_empty(&bond->slave_list)) {
if (!bond_has_slaves(bond)) {
if (bond_dev->type != slave_dev->type) {
pr_debug("%s: change device type from %d to %d\n",
bond_dev->name,
@ -1349,7 +1349,7 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
}
if (slave_ops->ndo_set_mac_address == NULL) {
if (list_empty(&bond->slave_list)) {
if (!bond_has_slaves(bond)) {
pr_warning("%s: Warning: The first slave device specified does not support setting the MAC address. Setting fail_over_mac to active.",
bond_dev->name);
bond->params.fail_over_mac = BOND_FOM_ACTIVE;
@ -1365,7 +1365,7 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
/* If this is the first slave, then we need to set the master's hardware
* address to be the same as the slave's. */
if (list_empty(&bond->slave_list) &&
if (!bond_has_slaves(bond) &&
bond->dev->addr_assign_type == NET_ADDR_RANDOM)
bond_set_dev_addr(bond->dev, slave_dev);
@ -1696,7 +1696,7 @@ err_free:
err_undo_flags:
bond_compute_features(bond);
/* Enslave of first slave has failed and we need to fix master's mac */
if (list_empty(&bond->slave_list) &&
if (!bond_has_slaves(bond) &&
ether_addr_equal(bond_dev->dev_addr, slave_dev->dev_addr))
eth_hw_addr_random(bond_dev);
@ -1776,7 +1776,7 @@ static int __bond_release_one(struct net_device *bond_dev,
if (!all && !bond->params.fail_over_mac) {
if (ether_addr_equal(bond_dev->dev_addr, slave->perm_hwaddr) &&
!list_empty(&bond->slave_list))
bond_has_slaves(bond))
pr_warn("%s: Warning: the permanent HWaddr of %s - %pM - is still in use by %s. Set the HWaddr of %s to a different address to avoid conflicts.\n",
bond_dev->name, slave_dev->name,
slave->perm_hwaddr,
@ -1819,7 +1819,7 @@ static int __bond_release_one(struct net_device *bond_dev,
write_lock_bh(&bond->lock);
}
if (list_empty(&bond->slave_list)) {
if (!bond_has_slaves(bond)) {
bond_set_carrier(bond);
eth_hw_addr_random(bond_dev);
@ -1835,7 +1835,7 @@ static int __bond_release_one(struct net_device *bond_dev,
unblock_netpoll_tx();
synchronize_rcu();
if (list_empty(&bond->slave_list)) {
if (!bond_has_slaves(bond)) {
call_netdevice_notifiers(NETDEV_CHANGEADDR, bond->dev);
call_netdevice_notifiers(NETDEV_RELEASE, bond->dev);
}
@ -1904,7 +1904,7 @@ static int bond_release_and_destroy(struct net_device *bond_dev,
int ret;
ret = bond_release(bond_dev, slave_dev);
if (ret == 0 && list_empty(&bond->slave_list)) {
if (ret == 0 && !bond_has_slaves(bond)) {
bond_dev->priv_flags |= IFF_DISABLE_NETPOLL;
pr_info("%s: destroying bond %s.\n",
bond_dev->name, bond_dev->name);
@ -2219,7 +2219,7 @@ void bond_mii_monitor(struct work_struct *work)
delay = msecs_to_jiffies(bond->params.miimon);
if (list_empty(&bond->slave_list))
if (!bond_has_slaves(bond))
goto re_arm;
should_notify_peers = bond_should_notify_peers(bond);
@ -2513,7 +2513,7 @@ void bond_loadbalance_arp_mon(struct work_struct *work)
read_lock(&bond->lock);
if (list_empty(&bond->slave_list))
if (!bond_has_slaves(bond))
goto re_arm;
oldcurrent = bond->curr_active_slave;
@ -2845,7 +2845,7 @@ void bond_activebackup_arp_mon(struct work_struct *work)
delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
if (list_empty(&bond->slave_list))
if (!bond_has_slaves(bond))
goto re_arm;
should_notify_peers = bond_should_notify_peers(bond);
@ -3169,7 +3169,7 @@ static int bond_open(struct net_device *bond_dev)
/* reset slave->backup and slave->inactive */
read_lock(&bond->lock);
if (!list_empty(&bond->slave_list)) {
if (bond_has_slaves(bond)) {
read_lock(&bond->curr_slave_lock);
bond_for_each_slave(bond, slave, iter) {
if ((bond->params.mode == BOND_MODE_ACTIVEBACKUP)
@ -3892,7 +3892,7 @@ static netdev_tx_t bond_start_xmit(struct sk_buff *skb, struct net_device *dev)
return NETDEV_TX_BUSY;
rcu_read_lock();
if (!list_empty(&bond->slave_list))
if (bond_has_slaves(bond))
ret = __bond_start_xmit(skb, dev);
else
kfree_skb(skb);

4
drivers/net/bonding/bond_sysfs.c
View File

@ -327,7 +327,7 @@ static ssize_t bonding_store_mode(struct device *d,
goto out;
}
if (!list_empty(&bond->slave_list)) {
if (bond_has_slaves(bond)) {
pr_err("unable to update mode of %s because it has slaves.\n",
bond->dev->name);
ret = -EPERM;
@ -523,7 +523,7 @@ static ssize_t bonding_store_fail_over_mac(struct device *d,
if (!rtnl_trylock())
return restart_syscall();
if (!list_empty(&bond->slave_list)) {
if (bond_has_slaves(bond)) {
pr_err("%s: Can't alter fail_over_mac with slaves in bond.\n",
bond->dev->name);
ret = -EPERM;

2
drivers/net/bonding/bonding.h
View File

@ -72,6 +72,8 @@
res; })
/* slave list primitives */
#define bond_has_slaves(bond) !list_empty(&(bond)->slave_list)
#define bond_to_slave(ptr) list_entry(ptr, struct slave, list)
/* IMPORTANT: bond_first/last_slave can return NULL in case of an empty list */