Re: [PATCH net-next v10 3/9] net: devmem: TCP tx netlink api

[Donald Hunter]

Mina Almasry <almasrymina@xxxxxxxxxx> writes:
>>
>> The bind-rx op has "flags: [ admin-perm ]", should bind-tx also?
>
> The omission of admin-perm for tx is intentional.
>
> Binding a dmabuf to an rx queue should and is a privileged operation,
> because basically the application doing the binding is taking
> ownership of this rx queue. For TX, no such queue ownership is being
> taken. The TX binding just gives the netdevice access to the dmabuf
> dma-addresses so the netdevice can send from there. It's very similar
> to a normal dma-map with normal memory. There is no need for privilege
> checks.

Thanks for the explanation. I couldn't find any mention of ownership in
the docs.