[RFC DUMMY 06/09]: Keep dummy devices on list

[Patrick McHardy]

[DUMMY]: Keep dummy devices on list

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

Signed-off-by: Patrick McHardy <[EMAIL PROTECTED]>

---
commit 5785eb9eb2c30be5662261fc115a65d28cc98c17
tree 51a0c8e4d7522895e2582f4a90330dad7e4d237e
parent c5178079b5d191e34a516dc111be862e3382e32b
author Patrick McHardy <[EMAIL PROTECTED]> Tue, 05 Jun 2007 15:40:28 +0200
committer Patrick McHardy <[EMAIL PROTECTED]> Tue, 05 Jun 2007 15:40:28 +0200

 drivers/net/dummy.c |   47 +++++++++++++++++++++++++++++------------------
 1 files changed, 29 insertions(+), 18 deletions(-)

diff --git a/drivers/net/dummy.c b/drivers/net/dummy.c
index 91b474c..2f2cf3c 100644
--- a/drivers/net/dummy.c
+++ b/drivers/net/dummy.c
@@ -34,6 +34,12 @@
 #include <linux/etherdevice.h>
 #include <linux/init.h>
 #include <linux/moduleparam.h>
+#include <linux/rtnetlink.h>
+
+struct dummy_priv {
+       struct net_device *dev;
+       struct list_head list;
+};
 
 static int numdummies = 1;
 
@@ -81,18 +87,20 @@ static int dummy_xmit(struct sk_buff *skb, struct 
net_device *dev)
        return 0;
 }
 
-static struct net_device **dummies;
+static LIST_HEAD(dummies);
 
 /* Number of dummy devices to be set up by this module. */
 module_param(numdummies, int, 0);
 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 dummy_priv *priv;
        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)
                return -ENOMEM;
@@ -101,40 +109,43 @@ static int __init dummy_init_one(int index)
                free_netdev(dev_dummy);
                dev_dummy = NULL;
        } else {
-               dummies[index] = dev_dummy;
+               priv = netdev_priv(dev_dummy);
+               priv->dev = dev_dummy;
+               list_add_tail(&priv->list, &dummies);
        }
 
        return err;
 }
 
-static void dummy_free_one(int index)
+static void dummy_free_one(struct net_device *dev)
 {
-       unregister_netdev(dummies[index]);
-       free_netdev(dummies[index]);
+       struct dummy_priv *priv = netdev_priv(dev);
+
+       list_del(&priv->list);
+       unregister_netdev(dev);
+       free_netdev(dev);
 }
 
 static int __init dummy_init_module(void)
 {
+       struct dummy_priv *priv, *next;
        int i, err = 0;
-       dummies = kmalloc(numdummies * sizeof(void *), GFP_KERNEL);
-       if (!dummies)
-               return -ENOMEM;
+
        for (i = 0; i < numdummies && !err; i++)
-               err = dummy_init_one(i);
+               err = dummy_init_one();
        if (err) {
-               i--;
-               while (--i >= 0)
-                       dummy_free_one(i);
+               list_for_each_entry_safe(priv, next, &dummies, list)
+                       dummy_free_one(priv->dev);
        }
        return err;
 }
 
 static void __exit dummy_cleanup_module(void)
 {
-       int i;
-       for (i = 0; i < numdummies; i++)
-               dummy_free_one(i);
-       kfree(dummies);
+       struct dummy_priv *priv, *next;
+
+       list_for_each_entry_safe(priv, next, &dummies, list)
+               dummy_free_one(priv->dev);
 }
 
 module_init(dummy_init_module);
-
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