From: Eric Dumazet <eric.dumazet@gmail.com>
To: "David S. Miller" <davem@davemloft.net>
Cc: Linux Netdev List <netdev@vger.kernel.org>
Subject: [PATCH 1/6] net: Introduce unregister_netdevice_queue()
Date: Tue, 27 Oct 2009 18:03:04 +0100 [thread overview]
Message-ID: <4AE727C8.7010700@gmail.com> (raw)
This patchs adds an unreg_list anchor to struct net_device, and
introduces an unregister_netdevice_queue() function, able to queue
a net_device to a list instead of immediately unregister it.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
---
include/linux/netdevice.h | 9 ++++++++-
net/core/dev.c | 20 +++++++++++++-------
2 files changed, 21 insertions(+), 8 deletions(-)
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 8380009..0ded0a4 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -683,6 +683,7 @@ struct net_device
struct list_head dev_list;
struct list_head napi_list;
+ struct list_head unreg_list;
/* Net device features */
unsigned long features;
@@ -1116,7 +1117,13 @@ extern int dev_close(struct net_device *dev);
extern void dev_disable_lro(struct net_device *dev);
extern int dev_queue_xmit(struct sk_buff *skb);
extern int register_netdevice(struct net_device *dev);
-extern void unregister_netdevice(struct net_device *dev);
+extern void unregister_netdevice_queue(struct net_device *dev,
+ struct list_head *head);
+static inline void unregister_netdevice(struct net_device *dev)
+{
+ unregister_netdevice_queue(dev, NULL);
+}
+
extern void free_netdev(struct net_device *dev);
extern void synchronize_net(void);
extern int register_netdevice_notifier(struct notifier_block *nb);
diff --git a/net/core/dev.c b/net/core/dev.c
index 950c13f..ff94e2b 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -5245,25 +5245,31 @@ void synchronize_net(void)
EXPORT_SYMBOL(synchronize_net);
/**
- * unregister_netdevice - remove device from the kernel
+ * unregister_netdevice_queue - remove device from the kernel
* @dev: device
- *
+ * @head: list
+
* This function shuts down a device interface and removes it
* from the kernel tables.
+ * If head not NULL, device is queued to be unregistered later.
*
* Callers must hold the rtnl semaphore. You may want
* unregister_netdev() instead of this.
*/
-void unregister_netdevice(struct net_device *dev)
+void unregister_netdevice_queue(struct net_device *dev, struct list_head *head)
{
ASSERT_RTNL();
- rollback_registered(dev);
- /* Finish processing unregister after unlock */
- net_set_todo(dev);
+ if (head) {
+ list_add_tail(&dev->unreg_list, head);
+ } else {
+ rollback_registered(dev);
+ /* Finish processing unregister after unlock */
+ net_set_todo(dev);
+ }
}
-EXPORT_SYMBOL(unregister_netdevice);
+EXPORT_SYMBOL(unregister_netdevice_queue);
/**
* unregister_netdev - remove device from the kernel
reply other threads:[~2009-10-27 17:03 UTC|newest]
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