netdev - Re: [PATCHv2 net 0/3] sctp: always send a chunk with the asoc that it belongs to

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Date:   Sat, 1 May 2021 16:53:58 +0000
From:   "Leppanen, Jere (Nokia - FI/Espoo)" <jere.leppanen@...ia.com>
To:     Xin Long <lucien.xin@...il.com>,
        network dev <netdev@...r.kernel.org>,
        "linux-sctp@...r.kernel.org" <linux-sctp@...r.kernel.org>
CC:     "davem@...emloft.net" <davem@...emloft.net>,
        "kuba@...nel.org" <kuba@...nel.org>,
        Marcelo Ricardo Leitner <marcelo.leitner@...il.com>,
        "Sverdlin, Alexander (Nokia - DE/Ulm)" <alexander.sverdlin@...ia.com>
Subject: Re: [PATCHv2 net 0/3] sctp: always send a chunk with the asoc that it
 belongs to

On Fri, 30 Apr 2021, Xin Long wrote:

> Currently when processing a duplicate COOKIE-ECHO chunk, a new temp
> asoc would be created, then it creates the chunks with the new asoc.
> However, later on it uses the old asoc to send these chunks, which
> has caused quite a few issues.
>
> This patchset is to fix this and make sure that the COOKIE-ACK and
> SHUTDOWN chunks are created with the same asoc that will be used to
> send them out.

Again, much thanks for looking into this. Patches 1 and 3 are
almost the same as my patch, which as I mentioned I've been
testing on and off for the past couple of weeks, and haven't
found any problems. (Then again, I didn't find any problems last
time either.)

I think 145cb2f7177d ("sctp: Fix bundling of SHUTDOWN with
COOKIE-ACK") should not be reverted (I'll reply to the patch).

12dfd78e3a74 ("sctp: Fix SHUTDOWN CTSN Ack in the peer restart
case") should be reverted. With association update no longer a
side effect, we can get CTSN normally from current assoc, since
it has been updated before sctp_make_shutdown().

>
> v1->v2:
>  - see Patch 3/3.
>
> Xin Long (3):
>  sctp: do asoc update earlier in sctp_sf_do_dupcook_a
>  Revert "sctp: Fix bundling of SHUTDOWN with COOKIE-ACK"
>  sctp: do asoc update earlier in sctp_sf_do_dupcook_b
>
> include/net/sctp/command.h |  1 -
> net/sctp/sm_sideeffect.c   | 26 ------------------------
> net/sctp/sm_statefuns.c    | 50 ++++++++++++++++++++++++++++++++++++----------
> 3 files changed, 39 insertions(+), 38 deletions(-)
>
> --
> 2.1.0