Re: [PARCH][RESEND] opensm/osm_sa_mcmember_record.c: Validate P_Key on IPoIB signed MGIDs

[Sasha Khapyorsky <sashak-smomgflXvOZWk0Htik3J/w@public.gmane.org>]

On 14:04 Thu 22 Oct     , Hal Rosenstock wrote:
> 
> Per RFC 4391 rules for P_Key portion of MGIDs needing to be 
> full member and valid P_Key

Strictly speaking I cannot find in RFC a requirement about valid P_Key,
even in MGID address example P_Key = 0x8000 is used there.

BTW what is the reason to be so restrictive here and preventing from not
fully complaint guys to work?

And even if so, why such MGID shouldn't be qualified as "regular" (non
IPoIB)? As far as I can see in the code the current behavior will take
this approach.

> 
> Signed-off-by: Hal Rosenstock <hal.rosenstock-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> ---
> diff --git a/opensm/opensm/osm_sa_mcmember_record.c b/opensm/opensm/osm_sa_mcmember_record.c
> index dd01eed..a185238 100644
> --- a/opensm/opensm/osm_sa_mcmember_record.c
> +++ b/opensm/opensm/osm_sa_mcmember_record.c
> @@ -3,6 +3,7 @@
>   * Copyright (c) 2002-2005 Mellanox Technologies LTD. All rights reserved.
>   * Copyright (c) 1996-2003 Intel Corporation. All rights reserved.
>   * Copyright (c) 2008 Xsigo Systems Inc.  All rights reserved.
> + * Copyright (c) 2009 HNR Consulting.  All rights reserved.
>   *
>   * This software is available to you under a choice of one of two
>   * licenses.  You may choose to be licensed under the terms of the GNU
> @@ -516,6 +517,7 @@ static ib_api_status_t validate_requested_mgid(IN osm_sa_t * sa,
>  					       p_mcm_rec)
>  {
>  	uint16_t signature;
> +	ib_net16_t pkey;
>  	boolean_t valid = TRUE;
>  
>  	OSM_LOG_ENTER(sa->p_log);
> @@ -555,6 +557,16 @@ static ib_api_status_t validate_requested_mgid(IN osm_sa_t * sa,
>  	 *
>  	 */
>  	if (signature == 0x401B || signature == 0x601B) {
> +		/* Validate P_Key portion of MGID per RFC 4391 */
> +		memcpy(&pkey, &(p_mcm_rec->mgid.raw[4]), sizeof(pkey));
> +		if (!ib_pkey_is_full_member(pkey) || ib_pkey_is_invalid(pkey)) {
> +			OSM_LOG(sa->p_log, OSM_LOG_ERROR, "ERR 1B27: "

This is a client's error, so we can reduce verbosity.

Sasha

> +				"MGID uses limited or invalid P_Key 0x%x\n",
> +				cl_ntoh16(pkey));
> +			valid = FALSE;
> +			goto Exit;
> +		}
> +
>  		OSM_LOG(sa->p_log, OSM_LOG_DEBUG,
>  			"Skipping MGID Validation for IPoIB Signed (0x%04X) MGIDs\n",
>  			signature);
> 
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