Re: [RFC][PATCH -mm take5 4/7] using symlink for the net_device

From: Keiichi KII
Date: Thu Jun 21 2007 - 05:24:57 EST


Hello Satyam,

In any case, however, the point to extend the critical section here
to encapsulate all the three parts still stands. We wouldn't want
ioctl(NETCON_REMOVE_TARGET) on the specified target to
return without removing the target that the user specified just
because that target's ethernet interface happens to be currently
undergoing a name change. The correct behaviour would be to
sleep on a mutex till the renaming has completed (which will
then relinquish the mutex) and then (after acquiring the mutex)
proceed to remove it, IMHO.

You're right. I misunderstood. All the three parts needs to encapsulate.

>> +static char *make_netdev_class_name(char *netdev_name)
>> +{
>> + char *name;
>> +
>> + name = kasprintf(GFP_KERNEL, "net:%s", netdev_name);
>
> Why the "net:" prefix in the filename?

Because I drew upon dev_change_name() method in net/core/dev.c.
The device_rename() in the above function makes use of same prefix
related to netdev.

I think you're referring to make_class_name() here? That seems to
be somewhat bulkier than simply being a wrapper over kasprintf()
like the make_netdev_class_name() here. I'd definitely recommend
not obfuscating this simple functionality here.

I understand. The wrapper method such as make_netdev_class_name() isn't
appropriate in this case.

Thanks
--
Keiichi KII
NEC Corporation OSS Platform Development Division
E-mail: k-keiichi@xxxxxxxxxxxxx

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