netdev - Re: [patch net-next] net: sched: move block device tracking into tcf_block_get/put

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Message-ID: <CAM0EoMkRu4-k90CbJbGWE+N0yy1M-NtzdN1vDohNfnK-TpMgig@mail.gmail.com>
Date: Thu, 4 Jan 2024 14:36:09 -0500
From: Jamal Hadi Salim <jhs@...atatu.com>
To: Victor Nogueira <victor@...atatu.com>
Cc: Jiri Pirko <jiri@...nulli.us>, netdev@...r.kernel.org, kuba@...nel.org, 
	pabeni@...hat.com, davem@...emloft.net, edumazet@...gle.com, 
	xiyou.wangcong@...il.com, pctammela@...atatu.com, idosch@...sch.org, 
	mleitner@...hat.com, vladbu@...dia.com, paulb@...dia.com
Subject: Re: [patch net-next] net: sched: move block device tracking into tcf_block_get/put_ext()

On Thu, Jan 4, 2024 at 2:27 PM Victor Nogueira <victor@...atatu.com> wrote:
>
> On 04/01/2024 09:58, Jiri Pirko wrote:
> > From: Jiri Pirko <jiri@...dia.com>
> >
> > Inserting the device to block xarray in qdisc_create() is not suitable
> > place to do this. As it requires use of tcf_block() callback, it causes
> > multiple issues. It is called for all qdisc types, which is incorrect.
> >
> > So, instead, move it to more suitable place, which is tcf_block_get_ext()
> > and make sure it is only done for qdiscs that use block infrastructure
> > and also only for blocks which are shared.
> >
> > Symmetrically, alter the cleanup path, move the xarray entry removal
> > into tcf_block_put_ext().
> >
> > Fixes: 913b47d3424e ("net/sched: Introduce tc block netdev tracking infra")
> > Reported-by: Ido Schimmel <idosch@...dia.com>
> > Closes: https://lore.kernel.org/all/ZY1hBb8GFwycfgvd@shredder/
> > Reported-by: Kui-Feng Lee <sinquersw@...il.com>
> > Closes: https://lore.kernel.org/all/ce8d3e55-b8bc-409c-ace9-5cf1c4f7c88e@gmail.com/
> > Reported-and-tested-by: syzbot+84339b9e7330daae4d66@...kaller.appspotmail.com
> > Closes: https://lore.kernel.org/all/0000000000007c85f5060dcc3a28@google.com/
> > Reported-and-tested-by: syzbot+806b0572c8d06b66b234@...kaller.appspotmail.com
> > Closes: https://lore.kernel.org/all/00000000000082f2f2060dcc3a92@google.com/
> > Reported-and-tested-by: syzbot+0039110f932d438130f9@...kaller.appspotmail.com
> > Closes: https://lore.kernel.org/all/0000000000007fbc8c060dcc3a5c@google.com/
> > Signed-off-by: Jiri Pirko <jiri@...dia.com>
>
> Reviewed-by: Victor Nogueira <victor@...atatu.com>
> Tested-by: Victor Nogueira <victor@...atatu.com>

Reviewed-by: Jamal Hadi Salim <jhs@...atatu.com>
Acked-by: Jamal Hadi Salim <jhs@...atatu.com>

cheers,
jamal