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Message-Id: <1298022215-21059-1-git-send-email-amwang@redhat.com>
Date: Fri, 18 Feb 2011 17:43:32 +0800
From: Amerigo Wang <amwang@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: Neil Horman <nhorman@...hat.com>,
Herbert Xu <herbert@...dor.hengli.com.au>,
Amerigo Wang <amwang@...hat.com>,
Jay Vosburgh <fubar@...ibm.com>, netdev@...r.kernel.org
Subject: [V4 PATCH 1/3] bonding: sync netpoll code with bridge
V4: rebase to net-next-2.6
V3: remove an useless #ifdef.
This patch unifies the netpoll code in bonding with netpoll code in bridge,
thanks to Herbert that code is much cleaner now.
Signed-off-by: WANG Cong <amwang@...hat.com>
Cc: Neil Horman <nhorman@...hat.com>
Cc: Herbert Xu <herbert@...dor.apana.org.au>
---
drivers/net/bonding/bond_main.c | 155 ++++++++++++++++++++++++--------------
drivers/net/bonding/bonding.h | 20 +++++
2 files changed, 118 insertions(+), 57 deletions(-)
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 77e3c6a..2ed6624 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -59,7 +59,6 @@
#include <linux/uaccess.h>
#include <linux/errno.h>
#include <linux/netdevice.h>
-#include <linux/netpoll.h>
#include <linux/inetdevice.h>
#include <linux/igmp.h>
#include <linux/etherdevice.h>
@@ -424,15 +423,11 @@ int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb,
{
skb->dev = slave_dev;
skb->priority = 1;
-#ifdef CONFIG_NET_POLL_CONTROLLER
- if (unlikely(bond->dev->priv_flags & IFF_IN_NETPOLL)) {
- struct netpoll *np = bond->dev->npinfo->netpoll;
- slave_dev->npinfo = bond->dev->npinfo;
+ if (unlikely(netpoll_tx_running(slave_dev))) {
slave_dev->priv_flags |= IFF_IN_NETPOLL;
- netpoll_send_skb_on_dev(np, skb, slave_dev);
+ bond_netpoll_send_skb(bond_get_slave_by_dev(bond, slave_dev), skb);
slave_dev->priv_flags &= ~IFF_IN_NETPOLL;
} else
-#endif
dev_queue_xmit(skb);
return 0;
@@ -1288,63 +1283,113 @@ static void bond_detach_slave(struct bonding *bond, struct slave *slave)
}
#ifdef CONFIG_NET_POLL_CONTROLLER
-/*
- * You must hold read lock on bond->lock before calling this.
- */
-static bool slaves_support_netpoll(struct net_device *bond_dev)
+static inline int slave_enable_netpoll(struct slave *slave)
{
- struct bonding *bond = netdev_priv(bond_dev);
- struct slave *slave;
- int i = 0;
- bool ret = true;
+ struct netpoll *np;
+ int err = 0;
- bond_for_each_slave(bond, slave, i) {
- if ((slave->dev->priv_flags & IFF_DISABLE_NETPOLL) ||
- !slave->dev->netdev_ops->ndo_poll_controller)
- ret = false;
+ np = kzalloc(sizeof(*np), GFP_KERNEL);
+ err = -ENOMEM;
+ if (!np)
+ goto out;
+
+ np->dev = slave->dev;
+ err = __netpoll_setup(np);
+ if (err) {
+ kfree(np);
+ goto out;
}
- return i != 0 && ret;
+ slave->np = np;
+out:
+ return err;
+}
+static inline void slave_disable_netpoll(struct slave *slave)
+{
+ struct netpoll *np = slave->np;
+
+ if (!np)
+ return;
+
+ slave->np = NULL;
+ synchronize_rcu_bh();
+ __netpoll_cleanup(np);
+ kfree(np);
+}
+static inline bool slave_dev_support_netpoll(struct net_device *slave_dev)
+{
+ if (slave_dev->priv_flags & IFF_DISABLE_NETPOLL)
+ return false;
+ if (!slave_dev->netdev_ops->ndo_poll_controller)
+ return false;
+ return true;
}
static void bond_poll_controller(struct net_device *bond_dev)
{
- struct bonding *bond = netdev_priv(bond_dev);
+}
+
+static void __bond_netpoll_cleanup(struct bonding *bond)
+{
struct slave *slave;
int i;
- bond_for_each_slave(bond, slave, i) {
- if (slave->dev && IS_UP(slave->dev))
- netpoll_poll_dev(slave->dev);
- }
+ bond_for_each_slave(bond, slave, i)
+ if (IS_UP(slave->dev))
+ slave_disable_netpoll(slave);
}
-
static void bond_netpoll_cleanup(struct net_device *bond_dev)
{
struct bonding *bond = netdev_priv(bond_dev);
+
+ read_lock(&bond->lock);
+ __bond_netpoll_cleanup(bond);
+ read_unlock(&bond->lock);
+}
+
+static int bond_netpoll_setup(struct net_device *dev, struct netpoll_info *ni)
+{
+ struct bonding *bond = netdev_priv(dev);
struct slave *slave;
- const struct net_device_ops *ops;
- int i;
+ int i, err = 0;
read_lock(&bond->lock);
- bond_dev->npinfo = NULL;
bond_for_each_slave(bond, slave, i) {
- if (slave->dev) {
- ops = slave->dev->netdev_ops;
- if (ops->ndo_netpoll_cleanup)
- ops->ndo_netpoll_cleanup(slave->dev);
- else
- slave->dev->npinfo = NULL;
+ if (!IS_UP(slave->dev))
+ continue;
+ err = slave_enable_netpoll(slave);
+ if (err) {
+ __bond_netpoll_cleanup(bond);
+ break;
}
}
read_unlock(&bond->lock);
+ return err;
}
-#else
+static struct netpoll_info *bond_netpoll_info(struct bonding *bond)
+{
+ return bond->dev->npinfo;
+}
+#else
+static inline int slave_enable_netpoll(struct slave *slave)
+{
+ return 0;
+}
+static inline void slave_disable_netpoll(struct slave *slave)
+{
+}
static void bond_netpoll_cleanup(struct net_device *bond_dev)
{
}
-
+static int bond_netpoll_setup(struct net_device *dev, struct netpoll_info *ni)
+{
+ return 0;
+}
+static struct netpoll_info *bond_netpoll_info(struct bonding *bond)
+{
+ return NULL;
+}
#endif
/*---------------------------------- IOCTL ----------------------------------*/
@@ -1782,17 +1827,19 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
bond_set_carrier(bond);
#ifdef CONFIG_NET_POLL_CONTROLLER
- if (slaves_support_netpoll(bond_dev)) {
- bond_dev->priv_flags &= ~IFF_DISABLE_NETPOLL;
- if (bond_dev->npinfo)
- slave_dev->npinfo = bond_dev->npinfo;
- } else if (!(bond_dev->priv_flags & IFF_DISABLE_NETPOLL)) {
- bond_dev->priv_flags |= IFF_DISABLE_NETPOLL;
- pr_info("New slave device %s does not support netpoll\n",
- slave_dev->name);
- pr_info("Disabling netpoll support for %s\n", bond_dev->name);
+ slave_dev->npinfo = bond_netpoll_info(bond);
+ if (slave_dev->npinfo) {
+ if (slave_enable_netpoll(new_slave)) {
+ read_unlock(&bond->lock);
+ pr_info("Error, %s: master_dev is using netpoll, "
+ "but new slave device does not support netpoll.\n",
+ bond_dev->name);
+ res = -EBUSY;
+ goto err_close;
+ }
}
#endif
+
read_unlock(&bond->lock);
res = bond_create_slave_symlinks(bond_dev, slave_dev);
@@ -1994,17 +2041,7 @@ int bond_release(struct net_device *bond_dev, struct net_device *slave_dev)
netdev_set_bond_master(slave_dev, NULL);
-#ifdef CONFIG_NET_POLL_CONTROLLER
- read_lock_bh(&bond->lock);
-
- if (slaves_support_netpoll(bond_dev))
- bond_dev->priv_flags &= ~IFF_DISABLE_NETPOLL;
- read_unlock_bh(&bond->lock);
- if (slave_dev->netdev_ops->ndo_netpoll_cleanup)
- slave_dev->netdev_ops->ndo_netpoll_cleanup(slave_dev);
- else
- slave_dev->npinfo = NULL;
-#endif
+ slave_disable_netpoll(slave);
/* close slave before restoring its mac address */
dev_close(slave_dev);
@@ -2039,6 +2076,7 @@ static int bond_release_and_destroy(struct net_device *bond_dev,
ret = bond_release(bond_dev, slave_dev);
if ((ret == 0) && (bond->slave_cnt == 0)) {
+ bond_dev->priv_flags |= IFF_DISABLE_NETPOLL;
pr_info("%s: destroying bond %s.\n",
bond_dev->name, bond_dev->name);
unregister_netdevice(bond_dev);
@@ -2116,6 +2154,8 @@ static int bond_release_all(struct net_device *bond_dev)
netdev_set_bond_master(slave_dev, NULL);
+ slave_disable_netpoll(slave);
+
/* close slave before restoring its mac address */
dev_close(slave_dev);
@@ -4654,6 +4694,7 @@ static const struct net_device_ops bond_netdev_ops = {
.ndo_vlan_rx_add_vid = bond_vlan_rx_add_vid,
.ndo_vlan_rx_kill_vid = bond_vlan_rx_kill_vid,
#ifdef CONFIG_NET_POLL_CONTROLLER
+ .ndo_netpoll_setup = bond_netpoll_setup,
.ndo_netpoll_cleanup = bond_netpoll_cleanup,
.ndo_poll_controller = bond_poll_controller,
#endif
diff --git a/drivers/net/bonding/bonding.h b/drivers/net/bonding/bonding.h
index 31fe980..0a3e00b 100644
--- a/drivers/net/bonding/bonding.h
+++ b/drivers/net/bonding/bonding.h
@@ -20,6 +20,7 @@
#include <linux/if_bonding.h>
#include <linux/cpumask.h>
#include <linux/in6.h>
+#include <linux/netpoll.h>
#include "bond_3ad.h"
#include "bond_alb.h"
@@ -198,6 +199,9 @@ struct slave {
u16 queue_id;
struct ad_slave_info ad_info; /* HUGE - better to dynamically alloc */
struct tlb_slave_info tlb_info;
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ struct netpoll *np;
+#endif
};
/*
@@ -323,6 +327,22 @@ static inline unsigned long slave_last_rx(struct bonding *bond,
return slave->dev->last_rx;
}
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static inline void bond_netpoll_send_skb(const struct slave *slave,
+ struct sk_buff *skb)
+{
+ struct netpoll *np = slave->np;
+
+ if (np)
+ netpoll_send_skb(np, skb);
+}
+#else
+static inline void bond_netpoll_send_skb(const struct slave *slave,
+ struct sk_buff *skb)
+{
+}
+#endif
+
static inline void bond_set_slave_inactive_flags(struct slave *slave)
{
struct bonding *bond = netdev_priv(slave->dev->master);
--
1.7.1
--
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