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Date:   Thu, 6 Sep 2018 06:34:00 -0400
From:   Jamal Hadi Salim <>
To:     Al Viro <>,
Cc:     Cong Wang <>, Jiri Pirko <>
Subject: Re: [PATCH 2/7] mark root hnode explicitly

On 2018-09-06 6:28 a.m., Jamal Hadi Salim wrote:
> On 2018-09-05 3:04 p.m., Al Viro wrote:
>> From: Al Viro <>
>> ... and disallow deleting or linking to such
>> Signed-off-by: Al Viro <>
> Same comment as other one in regards to subject
> Since the flag space is coming from htnode which is
> exposed via uapi it makes sense to keep this one here
> because it is for private use; but  a comment in
> include/uapi/linux/pkt_cls.h that this flag or
> maybe a set of bits is reserved for internal use.
> Otherwise:
> Acked-by: Jamal Hadi Salim <>

Sorry, additional comment:
It makes sense to reject user space attempt to
So my suggestion is to update tc_flags_valid() to
check for this.


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