提交 fe9925b5 编写于 作者: S Stephen Hemminger 提交者: David S. Miller

[NET]: Create netdev attribute_groups with class_device_add

Atomically create attributes when class device is added. This avoids
the race between registering class_device (which generates hotplug
event), and the creation of attribute groups.
Signed-off-by: NStephen Hemminger <shemminger@osdl.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 1498221d
......@@ -506,6 +506,8 @@ struct net_device
/* class/net/name entry */
struct class_device class_dev;
/* space for optional statistics and wireless sysfs groups */
struct attribute_group *sysfs_groups[3];
};
#define NETDEV_ALIGN 32
......
......@@ -3043,11 +3043,11 @@ void netdev_run_todo(void)
switch(dev->reg_state) {
case NETREG_REGISTERING:
dev->reg_state = NETREG_REGISTERED;
err = netdev_register_sysfs(dev);
if (err)
printk(KERN_ERR "%s: failed sysfs registration (%d)\n",
dev->name, err);
dev->reg_state = NETREG_REGISTERED;
break;
case NETREG_UNREGISTERING:
......
......@@ -29,7 +29,7 @@ static const char fmt_ulong[] = "%lu\n";
static inline int dev_isalive(const struct net_device *dev)
{
return dev->reg_state == NETREG_REGISTERED;
return dev->reg_state <= NETREG_REGISTERED;
}
/* use same locking rules as GIF* ioctl's */
......@@ -445,58 +445,33 @@ static struct class net_class = {
void netdev_unregister_sysfs(struct net_device * net)
{
struct class_device * class_dev = &(net->class_dev);
if (net->get_stats)
sysfs_remove_group(&class_dev->kobj, &netstat_group);
#ifdef WIRELESS_EXT
if (net->get_wireless_stats || (net->wireless_handlers &&
net->wireless_handlers->get_wireless_stats))
sysfs_remove_group(&class_dev->kobj, &wireless_group);
#endif
class_device_del(class_dev);
class_device_del(&(net->class_dev));
}
/* Create sysfs entries for network device. */
int netdev_register_sysfs(struct net_device *net)
{
struct class_device *class_dev = &(net->class_dev);
int ret;
struct attribute_group **groups = net->sysfs_groups;
class_device_initialize(class_dev);
class_dev->class = &net_class;
class_dev->class_data = net;
class_dev->groups = groups;
BUILD_BUG_ON(BUS_ID_SIZE < IFNAMSIZ);
strlcpy(class_dev->class_id, net->name, BUS_ID_SIZE);
if ((ret = class_device_register(class_dev)))
goto out;
if (net->get_stats &&
(ret = sysfs_create_group(&class_dev->kobj, &netstat_group)))
goto out_unreg;
if (net->get_stats)
*groups++ = &netstat_group;
#ifdef WIRELESS_EXT
if (net->get_wireless_stats || (net->wireless_handlers &&
net->wireless_handlers->get_wireless_stats)) {
ret = sysfs_create_group(&class_dev->kobj, &wireless_group);
if (ret)
goto out_cleanup;
}
return 0;
out_cleanup:
if (net->get_stats)
sysfs_remove_group(&class_dev->kobj, &netstat_group);
#else
return 0;
if (net->get_wireless_stats
|| (net->wireless_handlers && net->wireless_handlers->get_wireless_stats))
*groups++ = &wireless_group;
#endif
out_unreg:
printk(KERN_WARNING "%s: sysfs attribute registration failed %d\n",
net->name, ret);
class_device_unregister(class_dev);
out:
return ret;
return class_device_add(class_dev);
}
int netdev_sysfs_init(void)
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册