netdev - Re: [PATCH net 3/5] tls: don't skip over different type records from the rx

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Date: Mon, 19 Feb 2024 12:07:03 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: Sabrina Dubroca <sd@...asysnail.net>
Cc: netdev@...r.kernel.org, Boris Pismenny <borisp@...dia.com>, John
 Fastabend <john.fastabend@...il.com>, "David S. Miller"
 <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Paolo Abeni
 <pabeni@...hat.com>, Shuah Khan <shuah@...nel.org>, Vakul Garg
 <vakul.garg@....com>, linux-kselftest@...r.kernel.org
Subject: Re: [PATCH net 3/5] tls: don't skip over different type records
 from the rx_list

On Thu, 15 Feb 2024 17:17:31 +0100 Sabrina Dubroca wrote:
> @@ -1772,7 +1772,8 @@ static int process_rx_list(struct tls_sw_context_rx *ctx,
>  			   u8 *control,
>  			   size_t skip,
>  			   size_t len,
> -			   bool is_peek)
> +			   bool is_peek,
> +			   bool *more)
>  {
>  	struct sk_buff *skb = skb_peek(&ctx->rx_list);
>  	struct tls_msg *tlm;

> @@ -1844,6 +1845,10 @@ static int process_rx_list(struct tls_sw_context_rx *ctx,
>  
>  out:
>  	return copied ? : err;
> +more:
> +	if (more)
> +		*more = true;
> +	goto out;

Patches look correct, one small nit here -

I don't have great ideas how to avoid the 7th argument completely but 
I think it'd be a little cleaner if we either:
 - passed in err as an output argument (some datagram code does that
   IIRC), then function can always return copied directly, or 
 - passed copied as an output argument, and then we can always return
   err?
I like the former a little better because we won't have to special case
NULL for the "after async decryption" call sites.