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Date:   Tue, 5 Feb 2019 14:31:19 +0100
From:   Jiri Pirko <>
To:     Vlad Buslov <>
Subject: Re: [PATCH net-next v3 16/16] net: sched: unlock rules update API

Mon, Feb 04, 2019 at 01:33:01PM CET, wrote:
>Register netlink protocol handlers for message types RTM_NEWTFILTER,
>RTM_DELTFILTER, RTM_GETTFILTER as unlocked. Set rtnl_held variable that
>tracks rtnl mutex state to be false by default.
>Introduce tcf_proto_is_unlocked() helper that is used to check
>tcf_proto_ops->flag to determine if ops can be called without taking rtnl
>lock. Manually lookup Qdisc, class and block in rule update handlers.
>Verify that both Qdisc ops and proto ops are unlocked before using any of
>their callbacks, and obtain rtnl lock otherwise.
>Signed-off-by: Vlad Buslov <>

Acked-by: Jiri Pirko <>

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