netdev - Re: [PATCH net-next v3] hv_netvsc: Set device flags for properly indicating bonding in Hyper-V

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Message-ID: <20250211162026.593b0b93@kernel.org>
Date: Tue, 11 Feb 2025 16:20:26 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: longli@...uxonhyperv.com
Cc: Jason Gunthorpe <jgg@...pe.ca>, Leon Romanovsky <leon@...nel.org>, Ajay
 Sharma <sharmaajay@...rosoft.com>, Konstantin Taranov
 <kotaranov@...rosoft.com>, "David S. Miller" <davem@...emloft.net>, Eric
 Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>,
 linux-rdma@...r.kernel.org, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-hyperv@...r.kernel.org, Long Li
 <longli@...rosoft.com>
Subject: Re: [PATCH net-next v3] hv_netvsc: Set device flags for properly
 indicating bonding in Hyper-V

On Fri,  7 Feb 2025 13:55:37 -0800 longli@...uxonhyperv.com wrote:
> On Hyper-V platforms, a slave VF netdev always bonds to Netvsc and remains
> as Netvsc's only active slave as long as the slave device is present. This
> behavior is the same as a bonded device, but it's not user-configurable.
> 
> Some kernel APIs (e.g those in "include/linux/netdevice.h") check for
> IFF_MASTER, IFF_SLAVE and IFF_BONDING for determing if those are used in
> a master/slave bonded setup. Netvsc's bonding setup with its slave device
> falls into this category.

Again, this is way too much of a hack. You're trying to make
netif_is_bond_master() return true for your franken-interfaces
with minimal effort. 
-- 
pw-bot: reject