On 01/30/2015 07:18 PM, Arend van Spriel wrote:
> On 01/26/15 21:44, Arend van Spriel wrote:
>> Hi Hauke,
>>
>> The commit below causes the error mentioned in the Subject: field. I
>> would like to fix this, but could use a bit of help here how to do this
>> type of things.
>>
>> commit 4b681c82d2f9bef121c912ffcaac89a004af3f2c
>> Author: Vadim Kochan <vadim4j@xxxxxxxxx>
>> Date: Mon Jan 12 16:34:05 2015 +0200
>>
>> nl80211: Allow set network namespace by fd
>
> Hi Hauke,
>
> I looked into my issue a bit more. So my target kernel is
> 3.11.1-200.fc19.x86_64 and checking lxr found that 3.11 has this
> function, but it does not have EXPORT_SYMBOL(). That was added by the
> same commit above. Any clues how to fix this?
Hi Arend
As Johannes said it is probably not possible to backport
get_net_ns_by_fd() correctly. You can not access any symbols which are
not exported in a kernel. To backport it we have to access
netns_operations which is also not exported.
We could copy this function it into backports and remove this check
from the original function:
if (ei->ns_ops == &netns_operations)
..
Or we just backport this version every time:
struct net *get_net_ns_by_fd(int fd)
{
return ERR_PTR(-EINVAL);
}
Hauke
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