netdev - Re: [RFC PATCH net-next 0/5] Replay and offload host VLAN entries in DSA

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Date:   Mon, 14 Feb 2022 10:07:30 +0000
From:   Vladimir Oltean <vladimir.oltean@....com>
To:     Ido Schimmel <idosch@...sch.org>
CC:     Nikolay Aleksandrov <nikolay@...dia.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Jakub Kicinski <kuba@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Florian Fainelli <f.fainelli@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        Roopa Prabhu <roopa@...dia.com>, Jiri Pirko <jiri@...dia.com>,
        Ido Schimmel <idosch@...dia.com>,
        Rafael Richter <rafael.richter@....de>,
        Daniel Klauer <daniel.klauer@....de>,
        Tobias Waldekranz <tobias@...dekranz.com>
Subject: Re: [RFC PATCH net-next 0/5] Replay and offload host VLAN entries in
 DSA

On Mon, Feb 14, 2022 at 11:59:02AM +0200, Ido Schimmel wrote:
> Sounds good to me as well. I assume it means patches #1 and #2 will be
> changed to make use of this flag and patch #3 will be dropped?

Not quite. Patches 1 and 2 will be kept as-is, since fundamentally,
their goal is to eliminate a useless SWITCHDEV_PORT_OBJ_ADD event when
really nothing has changed (flags == old_flags, no brentry was created).

Patch 3 will be replaced with another patch that extends
br_switchdev_port_vlan_add() and struct switchdev_obj_port_vlan with a
"bool changed" meaning that "this notification signifies a change of
flags for an existing VLAN", and the callers of br_switchdev_port_vlan_add()
will populate it with false, or *changed, or *flags_changed, as appropriate.