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Commit 206c9fb2 authored by Patrick McHardy's avatar Patrick McHardy Committed by David S. Miller
Browse files

[DUMMY]: Keep dummy devices on list 



Use a list instead of an array to allow creating new devices.

Signed-off-by: default avatarPatrick McHardy <kaber@trash.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 58651b24

drivers/net/dummy.c

+29 −18
Original line number Original line Diff line number Diff line
@@ -34,6 +34,12 @@ 
#include <linux/etherdevice.h>

#include <linux/etherdevice.h>

#include <linux/init.h>

#include <linux/init.h>

#include <linux/moduleparam.h>

#include <linux/moduleparam.h>

#include <linux/rtnetlink.h>



struct dummy_priv {

	struct net_device *dev;

	struct list_head list;

};





static int numdummies = 1;

static int numdummies = 1;
@@ -81,18 +87,20 @@ static int dummy_xmit(struct sk_buff *skb, struct net_device *dev) 
	return 0;

	return 0;

}

}





static struct net_device **dummies;

static LIST_HEAD(dummies);





/* Number of dummy devices to be set up by this module. */

/* Number of dummy devices to be set up by this module. */

module_param(numdummies, int, 0);

module_param(numdummies, int, 0);

MODULE_PARM_DESC(numdummies, "Number of dummy pseudo devices");

MODULE_PARM_DESC(numdummies, "Number of dummy pseudo devices");





static int __init dummy_init_one(int index)

static int __init dummy_init_one(void)

{

{

	struct net_device *dev_dummy;

	struct net_device *dev_dummy;

	struct dummy_priv *priv;

	int err;

	int err;





	dev_dummy = alloc_netdev(0, "dummy%d", dummy_setup);

	dev_dummy = alloc_netdev(sizeof(struct dummy_priv), "dummy%d",

				 dummy_setup);





	if (!dev_dummy)

	if (!dev_dummy)

		return -ENOMEM;

		return -ENOMEM;
@@ -101,40 +109,43 @@ static int __init dummy_init_one(int index) 
		free_netdev(dev_dummy);

		free_netdev(dev_dummy);

		dev_dummy = NULL;

		dev_dummy = NULL;

	} else {

	} else {

		dummies[index] = dev_dummy;

		priv = netdev_priv(dev_dummy);

		priv->dev = dev_dummy;

		list_add_tail(&priv->list, &dummies);

	}

	}





	return err;

	return err;

}

}





static void dummy_free_one(int index)

static void dummy_free_one(struct net_device *dev)

{

{

	unregister_netdev(dummies[index]);

	struct dummy_priv *priv = netdev_priv(dev);

	free_netdev(dummies[index]);



	list_del(&priv->list);

	unregister_netdev(dev);

	free_netdev(dev);

}

}





static int __init dummy_init_module(void)

static int __init dummy_init_module(void)

{

{

	struct dummy_priv *priv, *next;

	int i, err = 0;

	int i, err = 0;

	dummies = kmalloc(numdummies * sizeof(void *), GFP_KERNEL);



	if (!dummies)

		return -ENOMEM;

	for (i = 0; i < numdummies && !err; i++)

	for (i = 0; i < numdummies && !err; i++)

		err = dummy_init_one(i);

		err = dummy_init_one();

	if (err) {

	if (err) {

		i--;

		list_for_each_entry_safe(priv, next, &dummies, list)

		while (--i >= 0)

			dummy_free_one(priv->dev);

			dummy_free_one(i);

	}

	}

	return err;

	return err;

}

}





static void __exit dummy_cleanup_module(void)

static void __exit dummy_cleanup_module(void)

{

{

	int i;

	struct dummy_priv *priv, *next;

	for (i = 0; i < numdummies; i++)



		dummy_free_one(i);

	list_for_each_entry_safe(priv, next, &dummies, list)

	kfree(dummies);

		dummy_free_one(priv->dev);

}

}





module_init(dummy_init_module);

module_init(dummy_init_module);