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net: make dev->master general

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dev->master is now tightly connected to bonding driver. This patch makes
this pointer more general and ready to be used by others.

 - netdev_set_master() - bond specifics moved to new function
   netdev_set_bond_master()
 - introduced netif_is_bond_slave() to check if device is a bonding slave

Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko 2011-02-12 06:48:36 +00:00 committed by David S. Miller
parent d59cfde2fb
commit 1765a57533
6 changed files with 54 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/infiniband/hw/nes/nes.c
View File

@ -153,7 +153,8 @@ static int nes_inetaddr_event(struct notifier_block *notifier,
nesdev, nesdev->netdev[0]->name);
netdev = nesdev->netdev[0];
nesvnic = netdev_priv(netdev);
is_bonded = (netdev->master == event_netdev);
is_bonded = netif_is_bond_slave(netdev) &&
(netdev->master == event_netdev);
if ((netdev == event_netdev) || is_bonded) {
if (nesvnic->rdma_enabled == 0) {
nes_debug(NES_DBG_NETDEV, "Returning without processing event for %s since"

2
drivers/infiniband/hw/nes/nes_cm.c
View File

@ -1118,7 +1118,7 @@ static int nes_addr_resolve_neigh(struct nes_vnic *nesvnic, u32 dst_ip, int arpi
return rc;
}
if (nesvnic->netdev->master)
if (netif_is_bond_slave(netdev))
netdev = nesvnic->netdev->master;
else
netdev = nesvnic->netdev;

10
drivers/net/bonding/bond_main.c
View File

@ -1594,9 +1594,9 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
}
}
res = netdev_set_master(slave_dev, bond_dev);
res = netdev_set_bond_master(slave_dev, bond_dev);
if (res) {
pr_debug("Error %d calling netdev_set_master\n", res);
pr_debug("Error %d calling netdev_set_bond_master\n", res);
goto err_restore_mac;
}
/* open the slave since the application closed it */
@ -1812,7 +1812,7 @@ err_close:
dev_close(slave_dev);
err_unset_master:
netdev_set_master(slave_dev, NULL);
netdev_set_bond_master(slave_dev, NULL);
err_restore_mac:
if (!bond->params.fail_over_mac) {
@ -1992,7 +1992,7 @@ int bond_release(struct net_device *bond_dev, struct net_device *slave_dev)
netif_addr_unlock_bh(bond_dev);
}
netdev_set_master(slave_dev, NULL);
netdev_set_bond_master(slave_dev, NULL);
#ifdef CONFIG_NET_POLL_CONTROLLER
read_lock_bh(&bond->lock);
@ -2114,7 +2114,7 @@ static int bond_release_all(struct net_device *bond_dev)
netif_addr_unlock_bh(bond_dev);
}
netdev_set_master(slave_dev, NULL);
netdev_set_bond_master(slave_dev, NULL);
/* close slave before restoring its mac address */
dev_close(slave_dev);

3
drivers/net/cxgb3/cxgb3_offload.c
View File

@ -186,9 +186,10 @@ static struct net_device *get_iff_from_mac(struct adapter *adapter,
dev = NULL;
if (grp)
dev = vlan_group_get_device(grp, vlan);
} else
} else if (netif_is_bond_slave(dev)) {
while (dev->master)
dev = dev->master;
}
return dev;
}
}

7
include/linux/netdevice.h
View File

@ -2377,6 +2377,8 @@ extern int netdev_max_backlog;
extern int netdev_tstamp_prequeue;
extern int weight_p;
extern int netdev_set_master(struct net_device *dev, struct net_device *master);
extern int netdev_set_bond_master(struct net_device *dev,
struct net_device *master);
extern int skb_checksum_help(struct sk_buff *skb);
extern struct sk_buff *skb_gso_segment(struct sk_buff *skb, u32 features);
#ifdef CONFIG_BUG
@ -2437,6 +2439,11 @@ static inline void netif_set_gso_max_size(struct net_device *dev,
dev->gso_max_size = size;
}
static inline int netif_is_bond_slave(struct net_device *dev)
{
return dev->flags & IFF_SLAVE && dev->priv_flags & IFF_BONDING;
}
extern struct pernet_operations __net_initdata loopback_net_ops;
static inline int dev_ethtool_get_settings(struct net_device *dev,

49
net/core/dev.c
View File

@ -3146,7 +3146,6 @@ static int __netif_receive_skb(struct sk_buff *skb)
struct packet_type *ptype, *pt_prev;
rx_handler_func_t *rx_handler;
struct net_device *orig_dev;
struct net_device *master;
struct net_device *null_or_orig;
struct net_device *orig_or_bond;
int ret = NET_RX_DROP;
@ -3173,15 +3172,19 @@ static int __netif_receive_skb(struct sk_buff *skb)
*/
null_or_orig = NULL;
orig_dev = skb->dev;
master = ACCESS_ONCE(orig_dev->master);
if (skb->deliver_no_wcard)
null_or_orig = orig_dev;
else if (master) {
if (__skb_bond_should_drop(skb, master)) {
skb->deliver_no_wcard = 1;
null_or_orig = orig_dev; /* deliver only exact match */
} else
skb->dev = master;
else if (netif_is_bond_slave(orig_dev)) {
struct net_device *bond_master = ACCESS_ONCE(orig_dev->master);
if (likely(bond_master)) {
if (__skb_bond_should_drop(skb, bond_master)) {
skb->deliver_no_wcard = 1;
/* deliver only exact match */
null_or_orig = orig_dev;
} else
skb->dev = bond_master;
}
}
__this_cpu_inc(softnet_data.processed);
@ -4346,15 +4349,14 @@ static int __init dev_proc_init(void)
/**
* netdev_set_master - set up master/slave pair
* netdev_set_master - set up master pointer
* @slave: slave device
* @master: new master device
*
* Changes the master device of the slave. Pass %NULL to break the
* bonding. The caller must hold the RTNL semaphore. On a failure
* a negative errno code is returned. On success the reference counts
* are adjusted, %RTM_NEWLINK is sent to the routing socket and the
* function returns zero.
* are adjusted and the function returns zero.
*/
int netdev_set_master(struct net_device *slave, struct net_device *master)
{
@ -4374,6 +4376,29 @@ int netdev_set_master(struct net_device *slave, struct net_device *master)
synchronize_net();
dev_put(old);
}
return 0;
}
EXPORT_SYMBOL(netdev_set_master);
/**
* netdev_set_bond_master - set up bonding master/slave pair
* @slave: slave device
* @master: new master device
*
* Changes the master device of the slave. Pass %NULL to break the
* bonding. The caller must hold the RTNL semaphore. On a failure
* a negative errno code is returned. On success %RTM_NEWLINK is sent
* to the routing socket and the function returns zero.
*/
int netdev_set_bond_master(struct net_device *slave, struct net_device *master)
{
int err;
ASSERT_RTNL();
err = netdev_set_master(slave, master);
if (err)
return err;
if (master)
slave->flags |= IFF_SLAVE;
else
@ -4382,7 +4407,7 @@ int netdev_set_master(struct net_device *slave, struct net_device *master)
rtmsg_ifinfo(RTM_NEWLINK, slave, IFF_SLAVE);
return 0;
}
EXPORT_SYMBOL(netdev_set_master);
EXPORT_SYMBOL(netdev_set_bond_master);
static void dev_change_rx_flags(struct net_device *dev, int flags)
{