AcoSail/kernel_optimize_test
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[IFB]: Keep ifb devices on list

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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 12:04:51 -07:00 committed by David S. Miller
parent 5d5cb173d8
commit 62b7ffcaaa
1 changed files with 21 additions and 15 deletions
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36
drivers/net/ifb.c
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@ -33,12 +33,15 @@
#include <linux/etherdevice.h>
#include <linux/init.h>
#include <linux/moduleparam.h>
#include <linux/list.h>
#include <net/pkt_sched.h>
#define TX_TIMEOUT (2*HZ)
#define TX_Q_LIMIT 32
struct ifb_private {
struct list_head list;
struct net_device *dev;
struct net_device_stats stats;
struct tasklet_struct ifb_tasklet;
int tasklet_pending;
@ -197,7 +200,7 @@ static struct net_device_stats *ifb_get_stats(struct net_device *dev)
return stats;
}
static struct net_device **ifbs;
static LIST_HEAD(ifbs);
/* Number of ifb devices to be set up by this module. */
module_param(numifbs, int, 0);
@ -229,6 +232,7 @@ static int ifb_open(struct net_device *dev)
static int __init ifb_init_one(int index)
{
struct net_device *dev_ifb;
struct ifb_private *priv;
int err;
dev_ifb = alloc_netdev(sizeof(struct ifb_private),
@ -241,30 +245,33 @@ static int __init ifb_init_one(int index)
free_netdev(dev_ifb);
dev_ifb = NULL;
} else {
ifbs[index] = dev_ifb;
priv = netdev_priv(dev_ifb);
priv->dev = dev_ifb;
list_add_tail(&priv->list, &ifbs);
}
return err;
}
static void ifb_free_one(int index)
static void ifb_free_one(struct net_device *dev)
{
unregister_netdev(ifbs[index]);
free_netdev(ifbs[index]);
struct ifb_private *priv = netdev_priv(dev);
list_del(&priv->list);
unregister_netdev(dev);
free_netdev(dev);
}
static int __init ifb_init_module(void)
{
struct ifb_private *priv, *next;
int i, err = 0;
ifbs = kmalloc(numifbs * sizeof(void *), GFP_KERNEL);
if (!ifbs)
return -ENOMEM;
for (i = 0; i < numifbs && !err; i++)
err = ifb_init_one(i);
if (err) {
i--;
while (--i >= 0)
ifb_free_one(i);
list_for_each_entry_safe(priv, next, &ifbs, list)
ifb_free_one(priv->dev);
}
return err;
@ -272,11 +279,10 @@ static int __init ifb_init_module(void)
static void __exit ifb_cleanup_module(void)
{
int i;
struct ifb_private *priv, *next;
for (i = 0; i < numifbs; i++)
ifb_free_one(i);
kfree(ifbs);
list_for_each_entry_safe(priv, next, &ifbs, list)
ifb_free_one(priv->dev);
}
module_init(ifb_init_module);