netdev - Re: [PATCH net-next v2 06/10] mlxsw: spectrum_router: Set hardware flags for routes

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Date:   Tue, 14 Jan 2020 17:41:02 +0100
From:   Jiri Pirko <jiri@...nulli.us>
To:     Ido Schimmel <idosch@...sch.org>
Cc:     netdev@...r.kernel.org, davem@...emloft.net, kuba@...nel.org,
        jiri@...lanox.com, dsahern@...il.com, roopa@...ulusnetworks.com,
        mlxsw@...lanox.com, Ido Schimmel <idosch@...lanox.com>
Subject: Re: [PATCH net-next v2 06/10] mlxsw: spectrum_router: Set hardware
 flags for routes

Tue, Jan 14, 2020 at 12:23:14PM CET, idosch@...sch.org wrote:
>From: Ido Schimmel <idosch@...lanox.com>
>
>Previous patches added support for two hardware flags for IPv4 and IPv6
>routes: 'RTM_F_OFFLOAD' and 'RTM_F_TRAP'. Both indicate the presence of
>the route in hardware. The first indicates that traffic is actually
>offloaded from the kernel, whereas the second indicates that packets
>hitting such routes are trapped to the kernel for processing (e.g., host
>routes).
>
>Use these two flags in mlxsw. The flags are modified in two places.
>Firstly, whenever a route is updated in the device's table. This
>includes the addition, deletion or update of a route. For example, when
>a host route is promoted to perform NVE decapsulation, its action in the
>device is updated, the 'RTM_F_OFFLOAD' flag set and the 'RTM_F_TRAP'
>flag cleared.
>
>Secondly, when a route is replaced and overwritten by another route, its
>flags are cleared.
>
>v2:
>* Convert to new fib_alias_hw_flags_set() interface
>
>Signed-off-by: Ido Schimmel <idosch@...lanox.com>

Acked-by: Jiri Pirko <jiri@...lanox.com>