netdev - Re: [patch net-next v3 3/9] ipv4: fib_rules: Dump FIB rules when registering FIB notifier

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Message-ID: <7471aa48-c06a-6984-bc8d-03abf7bfa487@cumulusnetworks.com>
Date:   Thu, 16 Mar 2017 09:18:33 -0600
From:   David Ahern <dsa@...ulusnetworks.com>
To:     Jiri Pirko <jiri@...nulli.us>, netdev@...r.kernel.org
Cc:     davem@...emloft.net, idosch@...lanox.com, mlxsw@...lanox.com,
        shm@...ulusnetworks.com, kuznet@....inr.ac.ru, jmorris@...ei.org,
        yoshfuji@...ux-ipv6.org, kaber@...sh.net, lorenzo@...gle.com,
        mateusz.bajorski@...ia.com
Subject: Re: [patch net-next v3 3/9] ipv4: fib_rules: Dump FIB rules when
 registering FIB notifier

On 3/16/17 2:08 AM, Jiri Pirko wrote:
> From: Ido Schimmel <idosch@...lanox.com>
> 
> In commit c3852ef7f2f8 ("ipv4: fib: Replay events when registering FIB
> notifier") we dumped the FIB tables and replayed the events to the
> passed notification block.
> 
> However, we merely sent a RULE_ADD notification in case custom rules
> were in use. As explained in previous patches, this approach won't work
> anymore. Instead, we should notify the caller about all the FIB rules
> and let it act accordingly.
> 
> Upon registration to the FIB notification chain, replay a RULE_ADD
> notification for each programmed FIB rule, custom or not. The integrity
> of the dump is ensured by the mechanism introduced in the above
> mentioned commit.
> 
> Prevent regressions by making sure current listeners correctly sanitize
> the notified rules.
> 
> Signed-off-by: Ido Schimmel <idosch@...lanox.com>
> Signed-off-by: Jiri Pirko <jiri@...lanox.com>
> ---
>  drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c | 13 ++++++++++++-
>  drivers/net/ethernet/rocker/rocker_main.c             | 17 +++++++++++++++--
>  net/ipv4/fib_rules.c                                  | 19 ++++++++++++++++---
>  3 files changed, 43 insertions(+), 6 deletions(-)

Acked-by: David Ahern <dsa@...ulusnetworks.com>