Mark Lord wrote:
Now that we have network namespace support merged it is time to
revisit the sysfs support so we can remove the dependency on !SYSFS.
...
Now that the namespace updates are part of 2.6.24,
there is a major inconsistency in network EXPORT_SYMBOLs.
It used to be that an external network module could get away without
having to add a MODULE_LICENSE("GPL*") line to the source.
In support of that, common networking functions (still) use EXPORT_SYMBOL()
rather than the more restrictive EXPORT_SYMBOL_GPL().
Eg. register_netdev(), sk_alloc(), __dev_get_by_name().
But now, none of those three are actually usable by default,
because they all require "init_net", which is EXPORT_SYMBOL_GPL().
So.. It appears that one of three things should really happen next:
1) Change the other exports to also be EXPORT_SYMBOL_GPL.
2) Have register_netdev, sk_alloc, and __dev_get_by_name default
to using init_net when NULL is specified in the namespace field.
or
3) Change init_net to be EXPORT_SYMBOL_GPL.
..
Obviously that should instead say:
3) Change init_net to be EXPORT_SYMBOL instead of EXPORT_SYMBOL_GPL.
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