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[DUMMY]: Keep dummy devices on list 

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

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy 2007-06-13 12:04:20 -07:00 committed by David S. Miller
parent 58651b24ac
commit 206c9fb26f
1 changed files with 29 additions and 18 deletions
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47
drivers/net/dummy.c
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@ -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);