netdev - Re: [bpf-next PATCH v3 0/4] sockmap/ktls fixes

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Date:   Thu, 2 May 2019 13:05:09 -0700
From:   John Fastabend <john.fastabend@...il.com>
To:     jakub.kicinski@...ronome.com, ast@...nel.org, daniel@...earbox.net
Cc:     netdev@...r.kernel.org, bpf@...r.kernel.org
Subject: Re: [bpf-next PATCH v3 0/4] sockmap/ktls fixes

On 4/30/19 7:06 PM, John Fastabend wrote:
> Series of fixes for sockmap and ktls, see patches for descriptions.
> 
> v2: fix build issue for CONFIG_TLS_DEVICE and fixup couple comments
>     from Jakub
> 
> v3: fix issue where release could call unhash resulting in a use after
>     free. Now we detach the ulp pointer before calling into destroy
>     or unhash. This way if we get a callback into unhash from destroy
>     path there is no ulp to access. The fallout is we must pass the
>     ctx into the functions rather than use the sk lookup in each
>     routine. This is probably better anyways.
> 
>     @Jakub, I did not fix the hw device case it seems the ulp ptr is
>     needed for the hardware teardown but this is buggy for sure. Its
>     not clear to me how to resolve the hw issue at the moment so fix
>     the sw path why we discuss it.
> 
Unfortunately, this is still failing with hardware offload (thanks
Jakub) so will need a v4 to actually fix this.


Thanks,
John

> ---
> 
> John Fastabend (4):
>       bpf: tls, implement unhash to avoid transition out of ESTABLISHED
>       bpf: sockmap remove duplicate queue free
>       bpf: sockmap fix msg->sg.size account on ingress skb
>       bpf: sockmap, only stop/flush strp if it was enabled at some point
> 
> 
>  include/net/tls.h    |   24 ++++++++++++---
>  net/core/skmsg.c     |    7 +++-
>  net/ipv4/tcp_bpf.c   |    2 -
>  net/tls/tls_device.c |    6 ++--
>  net/tls/tls_main.c   |   78 +++++++++++++++++++++++++++++++++-----------------
>  net/tls/tls_sw.c     |   51 ++++++++++++++++-----------------
>  6 files changed, 103 insertions(+), 65 deletions(-)
> 
> --
> Signature
>