netdev - Re: [PATCH bpf] bpf, sockmap: Fix bug that strp

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Date: Mon, 31 Jul 2023 18:22:49 -0700
From: Martin KaFai Lau <martin.lau@...ux.dev>
To: Xu Kuohai <xukuohai@...weicloud.com>,
 John Fastabend <john.fastabend@...il.com>
Cc: netdev@...r.kernel.org, bpf@...r.kernel.org,
 Jakub Sitnicki <jakub@...udflare.com>, "David S . Miller"
 <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 Daniel Borkmann <daniel@...earbox.net>
Subject: Re: [PATCH bpf] bpf, sockmap: Fix bug that strp_done cannot be called

On 7/28/23 3:57 AM, Xu Kuohai wrote:
> strp_done is only called when psock->progs.stream_parser is not NULL,
> but stream_parser was set to NULL by sk_psock_stop_strp(), called
> by sk_psock_drop() earlier. So, strp_done can never be called.
> 
> Introduce SK_PSOCK_RX_ENABLED to mark whether there is strp on psock.
> Change the condition for calling strp_done from judging whether
> stream_parser is set to judging whether this flag is set. This flag is
> only set once when strp_init() succeeds, and will never be cleared later.

John, please help to review.