netdev - RXFH manual configuration

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Date:   Sun, 18 Jun 2017 11:32:10 +0300
From:   Tariq Toukan <tariqt@...lanox.com>
To:     Jacob Keller <jacob.e.keller@...el.com>
Cc:     Linux Kernel Network Developers <netdev@...r.kernel.org>,
        Saeed Mahameed <saeedm@...lanox.com>,
        Eran Ben Elisha <eranbe@...lanox.com>
Subject: RXFH manual configuration

Hi Jacob,

I am looking at your patch:
d4ab4286276f ethtool: correctly ensure {GS}CHANNELS doesn't conflict ...

I wonder - if I want to configure the number of channels (ethtool -L), 
without being aware to the history of indirection table (manually set or 
not), how can I know what is the expected behavior?
I should be able, from userspace, to query the value of 
netif_is_rxfh_configured() in order to decide whether the outcome of an 
ethtool -L command is correct or not.

Do you know if this indication exists?

Thanks,
Tariq