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authorJiri Pirko <jpirko@redhat.com>2011-02-12 06:48:36 +0000
committerDavid S. Miller <davem@davemloft.net>2011-02-13 10:42:07 -0800
commit1765a575334f1a232c1478accdee5c7d19f4b3e3 (patch)
tree6613f53ce9095b799048d891f0b4b6e34a479fe0
parentd59cfde2fb960b5970ccb5a38cea25d38b37a8e8 (diff)
downloadlinux-1765a575334f1a232c1478accdee5c7d19f4b3e3.tar.bz2
net: make dev->master general
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>
-rw-r--r--drivers/infiniband/hw/nes/nes.c3
-rw-r--r--drivers/infiniband/hw/nes/nes_cm.c2
-rw-r--r--drivers/net/bonding/bond_main.c10
-rw-r--r--drivers/net/cxgb3/cxgb3_offload.c3
-rw-r--r--include/linux/netdevice.h7
-rw-r--r--net/core/dev.c49
6 files changed, 54 insertions, 20 deletions
diff --git a/drivers/infiniband/hw/nes/nes.c b/drivers/infiniband/hw/nes/nes.c
index 3b4ec3238ceb..3d7f3664b67b 100644
--- a/drivers/infiniband/hw/nes/nes.c
+++ b/drivers/infiniband/hw/nes/nes.c
@@ -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"
diff --git a/drivers/infiniband/hw/nes/nes_cm.c b/drivers/infiniband/hw/nes/nes_cm.c
index 009ec814d517..ec3aa11c36cb 100644
--- a/drivers/infiniband/hw/nes/nes_cm.c
+++ b/drivers/infiniband/hw/nes/nes_cm.c
@@ -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;
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 1df9f0ea9184..9f877878d636 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -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);
diff --git a/drivers/net/cxgb3/cxgb3_offload.c b/drivers/net/cxgb3/cxgb3_offload.c
index 7ea94b5205f8..862804f32b6e 100644
--- a/drivers/net/cxgb3/cxgb3_offload.c
+++ b/drivers/net/cxgb3/cxgb3_offload.c
@@ -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;
}
}
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 5a5baeaaa50f..5a42b1003767 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -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,
diff --git a/net/core/dev.c b/net/core/dev.c
index d874fd1baf49..a4132766d363 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -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)
{