netdev - Re: [PATCH net] net: sctp: Don't transition to PF state when transport has exhausted 'Path.Max.Retrans'.

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Message-ID: <535A649E.4090309@gmail.com>
Date:	Fri, 25 Apr 2014 09:35:26 -0400
From:	Vlad Yasevich <vyasevich@...il.com>
To:	Karl Heiss <kheiss@...il.com>, netdev@...r.kernel.org
CC:	linux-sctp@...r.kernel.org, nhorman@...driver.com
Subject: Re: [PATCH net] net: sctp: Don't transition to PF state when transport
 has exhausted 'Path.Max.Retrans'.

On 04/24/2014 03:16 PM, Karl Heiss wrote:
> Don't transition to the PF state on every strike after 'Path.Max.Retrans'. This
> also prevents sending SCTP_ADDR_UNREACHABLE to the user as the state bounces
> between SCTP_INACTIVE and SCTP_PF for each subsequent strike.
> 

Good catch.  We should never move to PF from INACTIVE.  I'd rather you
make it explicit by checking state rather then error counts.

Thanks
-vlad


> Signed-off-by: Karl Heiss <kheiss@...il.com>
> ---
>  net/sctp/sm_sideeffect.c |    3 ++-
>  1 files changed, 2 insertions(+), 1 deletions(-)
> 
> diff --git a/net/sctp/sm_sideeffect.c b/net/sctp/sm_sideeffect.c
> index 5d6883f..07f26fe 100644
> --- a/net/sctp/sm_sideeffect.c
> +++ b/net/sctp/sm_sideeffect.c
> @@ -502,7 +502,8 @@ static void sctp_do_8_2_transport_strike(sctp_cmd_seq_t *commands,
>  	if ((transport->state != SCTP_PF) &&
>  	   (transport->state != SCTP_UNCONFIRMED) &&
>  	   (asoc->pf_retrans < transport->pathmaxrxt) &&
> -	   (transport->error_count > asoc->pf_retrans)) {
> +	   (transport->error_count > asoc->pf_retrans) &&
> +	   (transport->error_count <= transport->pathmaxrxt)) {
>  
>  		sctp_assoc_control_transport(asoc, transport,
>  					     SCTP_TRANSPORT_PF,
> 

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