Re: [PATCH 1/13] opensm: Add support for alias GUIDs

[Alex Netes <alexne-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>]

Hi Hal,

On 09:27 Fri 29 Apr     , Hal Rosenstock wrote:
> From 4e40ac7961b0530abfec00db05b8f54e5c098e22 Mon Sep 17 00:00:00 2001
> From: Hal Rosenstock <hal-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
> Date: Thu, 28 Apr 2011 22:43:07 +0300
> Subject: [PATCH] opensm: Add support for alias GUIDs
> 
> In order to support virtualized environments, alias GUID support
> is added. Each virtualized environment can have an alias GUID
> used for mapping to that environment.
> 
> This patch adds support for alias GUIDs by adding an alias guid
> port table and populates it based on sets to SM GUIDInfo attribute
> based on SA sets/deletes of GUIDInfoRecord. Base port as well
> as alternate (alias) guids are included in this table.
> 
> An SM assigned GUID byte is added as a configuration option
> where an alias GUID is formed from OpenFabrics OUI
> followed by 40 bits xy 00 ab cd ef where xy is the SM assigned guid byte
> and ab cd ef is an SM autogenerated 24 bits.
> 
> The SM assigned GUID byte should be configured as subnet unique.
> 
> Signed-off-by: Hal Rosenstock <hal-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
> ---
>  include/opensm/osm_base.h       |   11 +
>  include/opensm/osm_madw.h       |   48 +++++-
>  include/opensm/osm_msgdef.h     |    3 +-
>  include/opensm/osm_sm.h         |    3 +-
>  include/opensm/osm_subnet.h     |    1 +
>  opensm/Makefile.am              |    2 +-
>  opensm/osm_guid_info_rcv.c      |  115 ++++++++++
>  opensm/osm_helper.c             |    1 +
>  opensm/osm_sa_class_port_info.c |    3 +-
>  opensm/osm_sa_guidinfo_record.c |  438 +++++++++++++++++++++++++++++++++++---
>  opensm/osm_sm.c                 |    9 +-
>  opensm/osm_sm_mad_ctrl.c        |    6 +-
>  opensm/osm_subnet.c             |   12 +-
>  13 files changed, 607 insertions(+), 45 deletions(-)
>  create mode 100644 opensm/osm_guid_info_rcv.c
> 
> diff --git a/include/opensm/osm_base.h b/include/opensm/osm_base.h
> index 07e971d..17de12d 100644
> --- a/include/opensm/osm_base.h
> +++ b/include/opensm/osm_base.h
> @@ -820,6 +820,17 @@ typedef enum _osm_thread_state {
>  #define OSM_CAP2_IS_HIERARCHY_SUPPORTED (1 << 4)
>  /***********/
>  
> +/****d* OpenSM: Base/OSM_CAP2_IS_ALIAS_GUIDS_SUPPORTED
> +* Name
> +*
> +* DESCRIPTION
> +*	Alias GUIDs supported
> +*
> +* SYNOPSIS
> +*/
> +#define OSM_CAP2_IS_ALIAS_GUIDS_SUPPORTED (1 << 5)
> +/***********/
> +
>  /****d* OpenSM: Base/osm_signal_t
>  * NAME
>  *	osm_signal_t
> diff --git a/include/opensm/osm_madw.h b/include/opensm/osm_madw.h
> index 9c63151..817de82 100644
> --- a/include/opensm/osm_madw.h
> +++ b/include/opensm/osm_madw.h
> @@ -1,6 +1,6 @@
>  /*
>   * Copyright (c) 2004-2009 Voltaire, Inc. All rights reserved.
> - * Copyright (c) 2002-2005 Mellanox Technologies LTD. All rights reserved.
> + * Copyright (c) 2002-2010 Mellanox Technologies LTD. All rights reserved.
>   * Copyright (c) 1996-2003 Intel Corporation. All rights reserved.
>   * Copyright (c) 2009 HNR Consulting. All rights reserved.
>   *
> @@ -185,6 +185,23 @@ typedef struct osm_pi_context {
>  } osm_pi_context_t;
>  /*********/
>  
> +/****s* OpenSM: MAD Wrapper/osm_gi_context_t
> +* NAME
> +*	osm_gi_context_t
> +*
> +* DESCRIPTION
> +*	Context needed by recipient of GUIDInfo attribute.
> +*
> +* SYNOPSIS
> +*/
> +typedef struct osm_gi_context {
> +	ib_net64_t node_guid;
> +	ib_net64_t port_guid;
> +	boolean_t set_method;
> +	uint8_t port_num;
> +} osm_gi_context_t;
> +/*********/
> +
>  /****s* OpenSM: MAD Wrapper/osm_nd_context_t
>  * NAME
>  *	osm_nd_context_t
> @@ -352,6 +369,7 @@ typedef struct osm_arbitrary_context {
>  typedef union _osm_madw_context {
>  	osm_ni_context_t ni_context;
>  	osm_pi_context_t pi_context;
> +	osm_gi_context_t gi_context;
>  	osm_nd_context_t nd_context;
>  	osm_si_context_t si_context;
>  	osm_lft_context_t lft_context;
> @@ -650,6 +668,34 @@ static inline osm_pi_context_t *osm_madw_get_pi_context_ptr(IN const osm_madw_t
>  * SEE ALSO
>  *********/
>  
> +/****f* OpenSM: MAD Wrapper/osm_madw_get_gi_context_ptr
> +* NAME
> +*	osm_madw_get_gi_context_ptr
> +*
> +* DESCRIPTION
> +*	Gets a pointer to the GUIDInfo context in this MAD.
> +*
> +* SYNOPSIS
> +*/
> +static inline osm_gi_context_t *osm_madw_get_gi_context_ptr(IN const osm_madw_t
> +							    * p_madw)
> +{
> +	return ((osm_gi_context_t *) & p_madw->context);
> +}
> +
> +/*
> +* PARAMETERS
> +*	p_madw
> +*		[in] Pointer to an osm_madw_t object.
> +*
> +* RETURN VALUES
> +*	Pointer to the start of the context structure.
> +*
> +* NOTES
> +*
> +* SEE ALSO
> +*********/
> +
>  /****f* OpenSM: MAD Wrapper/osm_madw_get_nd_context_ptr
>  * NAME
>  *	osm_madw_get_nd_context_ptr
> diff --git a/include/opensm/osm_msgdef.h b/include/opensm/osm_msgdef.h
> index dbf3e53..cae8d93 100644
> --- a/include/opensm/osm_msgdef.h
> +++ b/include/opensm/osm_msgdef.h
> @@ -1,6 +1,6 @@
>  /*
>   * Copyright (c) 2004-2006 Voltaire, Inc. All rights reserved.
> - * Copyright (c) 2002-2005 Mellanox Technologies LTD. All rights reserved.
> + * Copyright (c) 2002-2010 Mellanox Technologies LTD. All rights reserved.
>   * Copyright (c) 1996-2003 Intel Corporation. All rights reserved.
>   *
>   * This software is available to you under a choice of one of two
> @@ -130,6 +130,7 @@ enum {
>  	OSM_MSG_MAD_NODE_INFO,
>  	OSM_MSG_MAD_PORT_INFO,
>  	OSM_MSG_MAD_SWITCH_INFO,
> +	OSM_MSG_MAD_GUID_INFO,
>  	OSM_MSG_MAD_NODE_DESC,
>  	OSM_MSG_MAD_NODE_RECORD,
>  	OSM_MSG_MAD_PORTINFO_RECORD,
> diff --git a/include/opensm/osm_sm.h b/include/opensm/osm_sm.h
> index a3b770f..dae68da 100644
> --- a/include/opensm/osm_sm.h
> +++ b/include/opensm/osm_sm.h
> @@ -1,6 +1,6 @@
>  /*
>   * Copyright (c) 2004-2009 Voltaire, Inc. All rights reserved.
> - * Copyright (c) 2002-2005,2009 Mellanox Technologies LTD. All rights reserved.
> + * Copyright (c) 2002-2010 Mellanox Technologies LTD. All rights reserved.
>   * Copyright (c) 1996-2003 Intel Corporation. All rights reserved.
>   *
>   * This software is available to you under a choice of one of two
> @@ -135,6 +135,7 @@ typedef struct osm_sm {
>  	cl_disp_reg_handle_t sweep_fail_disp_h;
>  	cl_disp_reg_handle_t ni_disp_h;
>  	cl_disp_reg_handle_t pi_disp_h;
> +	cl_disp_reg_handle_t gi_disp_h;
>  	cl_disp_reg_handle_t nd_disp_h;
>  	cl_disp_reg_handle_t si_disp_h;
>  	cl_disp_reg_handle_t lft_disp_h;
> diff --git a/include/opensm/osm_subnet.h b/include/opensm/osm_subnet.h
> index 83ef77e..914b9d4 100644
> --- a/include/opensm/osm_subnet.h
> +++ b/include/opensm/osm_subnet.h
> @@ -181,6 +181,7 @@ typedef struct osm_subn_opt {
>  	unsigned long log_max_size;
>  	char *partition_config_file;
>  	boolean_t no_partition_enforcement;
> +	uint8_t sm_assigned_guid;
>  	boolean_t qos;
>  	char *qos_policy_file;
>  	boolean_t accum_log_file;
> diff --git a/opensm/Makefile.am b/opensm/Makefile.am
> index 69ff593..ec626bb 100644
> --- a/opensm/Makefile.am
> +++ b/opensm/Makefile.am
> @@ -28,7 +28,7 @@ sbin_PROGRAMS = opensm
>  opensm_LDFLAGS = -rdynamic
>  opensm_DEPENDENCIES = libopensm.la
>  opensm_SOURCES = main.c osm_console_io.c osm_console.c osm_db_files.c \
> -		 osm_db_pack.c osm_drop_mgr.c \
> +		 osm_db_pack.c osm_drop_mgr.c osm_guid_info_rcv.c \
>  		 osm_inform.c osm_lid_mgr.c osm_lin_fwd_rcv.c \
>  		 osm_link_mgr.c osm_mcast_fwd_rcv.c \
>  		 osm_mcast_mgr.c osm_mcast_tbl.c \
> diff --git a/opensm/osm_guid_info_rcv.c b/opensm/osm_guid_info_rcv.c
> new file mode 100644
> index 0000000..26baf71
> --- /dev/null
> +++ b/opensm/osm_guid_info_rcv.c
> @@ -0,0 +1,115 @@
> +/*
> + * Copyright (c) 2004-2009 Voltaire, Inc. All rights reserved.
> + * Copyright (c) 2002-2010 Mellanox Technologies LTD. All rights reserved.
> + * Copyright (c) 1996-2003 Intel Corporation. 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
> + * General Public License (GPL) Version 2, available from the file
> + * COPYING in the main directory of this source tree, or the
> + * OpenIB.org BSD license below:
> + *
> + *     Redistribution and use in source and binary forms, with or
> + *     without modification, are permitted provided that the following
> + *     conditions are met:
> + *
> + *      - Redistributions of source code must retain the above
> + *        copyright notice, this list of conditions and the following
> + *        disclaimer.
> + *
> + *      - Redistributions in binary form must reproduce the above
> + *        copyright notice, this list of conditions and the following
> + *        disclaimer in the documentation and/or other materials
> + *        provided with the distribution.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
> + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
> + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
> + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
> + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
> + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
> + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
> + * SOFTWARE.
> + *
> + */
> +
> +/*
> + * Abstract:
> + *    Implementation of osm_gi_rcv_t.
> + * This object represents the GUIDInfo Receiver object.
> + * This object is part of the opensm family of objects.
> + */
> +
> +#if HAVE_CONFIG_H
> +#  include <config.h>
> +#endif				/* HAVE_CONFIG_H */
> +
> +#include <string.h>
> +#include <stdlib.h>
> +#include <iba/ib_types.h>
> +#include <complib/cl_qmap.h>
> +#include <complib/cl_passivelock.h>
> +#include <complib/cl_debug.h>
> +#include <vendor/osm_vendor_api.h>
> +#include <opensm/osm_madw.h>
> +#include <opensm/osm_log.h>
> +#include <opensm/osm_node.h>
> +#include <opensm/osm_subnet.h>
> +#include <opensm/osm_mad_pool.h>
> +#include <opensm/osm_msgdef.h>
> +#include <opensm/osm_helper.h>
> +#include <opensm/osm_remote_sm.h>
> +#include <opensm/osm_opensm.h>
> +
> +void osm_gi_rcv_process(IN void *context, IN void *data)
> +{
> +	osm_sm_t *sm = context;
> +	osm_madw_t *p_madw = data;
> +	ib_guid_info_t *p_gi;
> +	ib_smp_t *p_smp;
> +	osm_port_t *p_port;
> +	osm_gi_context_t *p_context;
> +	ib_net64_t port_guid, node_guid;
> +	uint8_t block_num, port_num;
> +
> +	OSM_LOG_ENTER(sm->p_log);
> +
> +	CL_ASSERT(sm);
> +	CL_ASSERT(p_madw);
> +
> +	p_smp = osm_madw_get_smp_ptr(p_madw);
> +	p_context = osm_madw_get_gi_context_ptr(p_madw);
> +	p_gi = ib_smp_get_payload_ptr(p_smp);
> +
> +	CL_ASSERT(p_smp->attr_id == IB_MAD_ATTR_GUID_INFO);
> +
> +	block_num = (uint8_t) cl_ntoh32(p_smp->attr_mod);
> +
> +	port_guid = p_context->port_guid;
> +	node_guid = p_context->node_guid;
> +	port_num = p_context->port_num;
> +
> +	osm_dump_guid_info(sm->p_log, node_guid, port_guid, block_num, p_gi,
> +			   OSM_LOG_DEBUG);
> +
> +	CL_PLOCK_EXCL_ACQUIRE(sm->p_lock);
> +	p_port = osm_get_port_by_guid(sm->p_subn, port_guid);
> +	if (!p_port) {
> +		CL_PLOCK_RELEASE(sm->p_lock);
> +		OSM_LOG(sm->p_log, OSM_LOG_ERROR, "ERR 4701: "
> +			"No port object for port with GUID 0x%" PRIx64
> +			"\n\t\t\t\tfor parent node GUID 0x%" PRIx64
> +			", TID 0x%" PRIx64 "\n",
> +			cl_ntoh64(port_guid), cl_ntoh64(node_guid),
> +			cl_ntoh64(p_smp->trans_id));
> +		goto Exit;
> +	}
> +
> +	CL_PLOCK_RELEASE(sm->p_lock);
> +
> +Exit:
> +	/*
> +	   Release the lock before jumping here!!
> +	 */
> +	OSM_LOG_EXIT(sm->p_log);
> +}
> diff --git a/opensm/osm_helper.c b/opensm/osm_helper.c
> index 0b0580a..f7e80ea 100644
> --- a/opensm/osm_helper.c
> +++ b/opensm/osm_helper.c
> @@ -2030,6 +2030,7 @@ static const char *disp_msg_str[] = {
>  	"OSM_MSG_MAD_NODE_INFO",
>  	"OSM_MSG_MAD_PORT_INFO",
>  	"OSM_MSG_MAD_SWITCH_INFO",
> +	"OSM_MSG_MAD_GUID_INFO",
>  	"OSM_MSG_MAD_NODE_DESC",
>  	"OSM_MSG_MAD_NODE_RECORD",
>  	"OSM_MSG_MAD_PORTINFO_RECORD",
> diff --git a/opensm/osm_sa_class_port_info.c b/opensm/osm_sa_class_port_info.c
> index 02dab82..8108a9a 100644
> --- a/opensm/osm_sa_class_port_info.c
> +++ b/opensm/osm_sa_class_port_info.c
> @@ -1,6 +1,6 @@
>  /*
>   * Copyright (c) 2004-2008 Voltaire, Inc. All rights reserved.
> - * Copyright (c) 2002-2007 Mellanox Technologies LTD. All rights reserved.
> + * Copyright (c) 2002-2010 Mellanox Technologies LTD. All rights reserved.
>   * Copyright (c) 1996-2003 Intel Corporation. All rights reserved.
>   *
>   * This software is available to you under a choice of one of two
> @@ -156,6 +156,7 @@ static void cpi_rcv_respond(IN osm_sa_t * sa, IN const osm_madw_t * p_madw)
>  	p_resp_cpi->cap_mask = OSM_CAP_IS_SUBN_GET_SET_NOTICE_SUP |
>  	    OSM_CAP_IS_PORT_INFO_CAPMASK_MATCH_SUPPORTED;
>  #endif
> +	ib_class_set_cap_mask2(p_resp_cpi, OSM_CAP2_IS_ALIAS_GUIDS_SUPPORTED);
>  	if (sa->p_subn->opt.qos)
>  		ib_class_set_cap_mask2(p_resp_cpi, OSM_CAP2_IS_QOS_SUPPORTED |
>  						   OSM_CAP2_IS_MCAST_TOP_SUPPORTED);
> diff --git a/opensm/osm_sa_guidinfo_record.c b/opensm/osm_sa_guidinfo_record.c
> index 3559a39..484633f 100644
> --- a/opensm/osm_sa_guidinfo_record.c
> +++ b/opensm/osm_sa_guidinfo_record.c
> @@ -1,6 +1,6 @@
>  /*
>   * Copyright (c) 2006-2009 Voltaire, Inc. All rights reserved.
> - * Copyright (c) 2002-2006 Mellanox Technologies LTD. All rights reserved.
> + * Copyright (c) 2002-2011 Mellanox Technologies LTD. All rights reserved.
>   * Copyright (c) 1996-2003 Intel Corporation. All rights reserved.
>   *
>   * This software is available to you under a choice of one of two
> @@ -57,6 +57,9 @@
>  #include <opensm/osm_pkey.h>
>  #include <opensm/osm_sa.h>
>  
> +#define IB_OPENIB_OUI	0x001405
> +#define MOD_GIR_COMP_MASK (IB_GIR_COMPMASK_LID | IB_GIR_COMPMASK_BLOCKNUM)
> +
>  typedef struct osm_gir_item {
>  	cl_list_item_t list_item;
>  	ib_guidinfo_record_t rec;
> @@ -75,7 +78,7 @@ static ib_api_status_t gir_rcv_new_gir(IN osm_sa_t * sa,
>  				       IN cl_qlist_t * p_list,
>  				       IN ib_net64_t const match_port_guid,
>  				       IN ib_net16_t const match_lid,
> -				       IN const osm_physp_t * p_req_physp,
> +				       IN const osm_physp_t * p_physp,
>  				       IN uint8_t const block_num)
>  {
>  	osm_gir_item_t *p_rec_item;
> @@ -99,9 +102,12 @@ static ib_api_status_t gir_rcv_new_gir(IN osm_sa_t * sa,
>  
>  	p_rec_item->rec.lid = match_lid;
>  	p_rec_item->rec.block_num = block_num;
> -	if (!block_num)
> -		p_rec_item->rec.guid_info.guid[0] =
> -		    osm_physp_get_port_guid(p_req_physp);
> +	if (p_physp->p_guids)
> +		memcpy(&p_rec_item->rec.guid_info,
> +		       *p_physp->p_guids + block_num * GUID_TABLE_MAX_ENTRIES,
> +		       sizeof(ib_guid_info_t));
> +	else if (!block_num)
> +		p_rec_item->rec.guid_info.guid[0] = osm_physp_get_port_guid(p_physp);
>  
>  	cl_qlist_insert_tail(p_list, &p_rec_item->list_item);
>  
> @@ -279,50 +285,342 @@ Exit:
>  	OSM_LOG_EXIT(p_ctxt->sa->p_log);
>  }
>  
> -void osm_gir_rcv_process(IN void *ctx, IN void *data)
> +static inline boolean_t check_mod_comp_mask(ib_net64_t comp_mask)
>  {
> -	osm_sa_t *sa = ctx;
> -	osm_madw_t *p_madw = data;
> -	const ib_sa_mad_t *p_rcvd_mad;
> -	const ib_guidinfo_record_t *p_rcvd_rec;
> -	cl_qlist_t rec_list;
> -	osm_gir_search_ctxt_t context;
> -	osm_physp_t *p_req_physp;
> +	return ((comp_mask & MOD_GIR_COMP_MASK) == MOD_GIR_COMP_MASK);
> +}
>  
> -	CL_ASSERT(sa);
> +static uint8_t coalesce_comp_mask(IN osm_madw_t *p_madw)
> +{
> +	uint8_t comp_mask = 0;
> +	ib_sa_mad_t *p_sa_mad;
> +
> +	p_sa_mad = osm_madw_get_sa_mad_ptr(p_madw);
> +	if (p_sa_mad->comp_mask & IB_GIR_COMPMASK_GID0)
> +		comp_mask |= 1<<0;
> +	if (p_sa_mad->comp_mask & IB_GIR_COMPMASK_GID1)
> +		comp_mask |= 1<<1;
> +	if (p_sa_mad->comp_mask & IB_GIR_COMPMASK_GID2)
> +		comp_mask |= 1<<2;
> +	if (p_sa_mad->comp_mask & IB_GIR_COMPMASK_GID3)
> +		comp_mask |= 1<<3;
> +	if (p_sa_mad->comp_mask & IB_GIR_COMPMASK_GID4)
> +		comp_mask |= 1<<4;
> +	if (p_sa_mad->comp_mask & IB_GIR_COMPMASK_GID5)
> +		comp_mask |= 1<<5;
> +	if (p_sa_mad->comp_mask & IB_GIR_COMPMASK_GID6)
> +		comp_mask |= 1<<6;
> +	if (p_sa_mad->comp_mask & IB_GIR_COMPMASK_GID7)
> +		comp_mask |= 1<<7;
> +	return comp_mask;
> +}
> +
> +static void guidinfo_respond(IN osm_sa_t *sa, IN osm_madw_t *p_madw,
> +			     IN ib_guidinfo_record_t * p_guidinfo_rec)
> +{
> +	cl_qlist_t rec_list;
> +	osm_gir_item_t *item;
>  
>  	OSM_LOG_ENTER(sa->p_log);
>  
> -	CL_ASSERT(p_madw);
> +	item = malloc(sizeof(*item));
> +	if (!item) {
> +		OSM_LOG(sa->p_log, OSM_LOG_ERROR, "ERR 5101: "
> +			"rec_item alloc failed\n");
> +		goto Exit;
> +	}
>  
> -	p_rcvd_mad = osm_madw_get_sa_mad_ptr(p_madw);
> -	p_rcvd_rec =
> -	    (ib_guidinfo_record_t *) ib_sa_mad_get_payload_ptr(p_rcvd_mad);
> +	item->rec = *p_guidinfo_rec;
>  
> -	CL_ASSERT(p_rcvd_mad->attr_id == IB_MAD_ATTR_GUIDINFO_RECORD);
> +	cl_qlist_init(&rec_list);
> +	cl_qlist_insert_tail(&rec_list, &item->list_item);
>  
> -	/* we only support SubnAdmGet and SubnAdmGetTable methods */
> -	if (p_rcvd_mad->method != IB_MAD_METHOD_GET &&
> -	    p_rcvd_mad->method != IB_MAD_METHOD_GETTABLE) {
> -		OSM_LOG(sa->p_log, OSM_LOG_ERROR, "ERR 5105: "
> -			"Unsupported Method (%s)\n",
> -			ib_get_sa_method_str(p_rcvd_mad->method));
> -		osm_sa_send_error(sa, p_madw, IB_MAD_STATUS_UNSUP_METHOD_ATTR);
> -		goto Exit;
> +	osm_sa_respond(sa, p_madw, sizeof(ib_guidinfo_record_t), &rec_list);
> +
> +Exit:
> +	OSM_LOG_EXIT(sa->p_log);
> +}
> +
> +static void gir_respond(IN osm_sa_t *sa, IN osm_madw_t *p_madw)
> +{
> +	ib_sa_mad_t *p_sa_mad;
> +	ib_guidinfo_record_t *p_rcvd_rec;
> +	ib_guidinfo_record_t guidinfo_rec;
> +
> +	p_sa_mad = osm_madw_get_sa_mad_ptr(p_madw);
> +	p_rcvd_rec = (ib_guidinfo_record_t *) ib_sa_mad_get_payload_ptr(p_sa_mad);
> +	if (osm_log_is_active(sa->p_log, OSM_LOG_DEBUG))
> +		osm_dump_guidinfo_record(sa->p_log, p_rcvd_rec, OSM_LOG_DEBUG);
> +
> +	guidinfo_rec = *p_rcvd_rec;
> +	guidinfo_respond(sa, p_madw, &guidinfo_rec);
> +}
> +
> +static ib_net64_t sm_assigned_guid(uint8_t assigned_byte)
> +{
> +	static uint32_t uniq_count;
> +
> +	if (++uniq_count == 0) {
> +		uniq_count--;
> +		return 0;
>  	}
> +	return cl_hton64(((uint64_t) uniq_count) |
> +			 (((uint64_t) assigned_byte) << 32) |
> +			 (((uint64_t) IB_OPENIB_OUI) << 40));
> +}
>  
> -	/* update the requester physical port. */
> -	p_req_physp = osm_get_physp_by_mad_addr(sa->p_log, sa->p_subn,
> -						osm_madw_get_mad_addr_ptr
> -						(p_madw));
> -	if (p_req_physp == NULL) {
> -		OSM_LOG(sa->p_log, OSM_LOG_ERROR, "ERR 5104: "
> -			"Cannot find requester physical port\n");
> +static void guidinfo_set(IN osm_sa_t *sa, IN osm_port_t *p_port,
> +			 IN uint8_t block_num)
> +{
> +	uint8_t payload[IB_SMP_DATA_SIZE];
> +	osm_madw_context_t context;
> +	ib_api_status_t status;
> +
> +	memcpy(payload,
> +	       &((*p_port->p_physp->p_guids)[block_num * GUID_TABLE_MAX_ENTRIES]),
> +	       sizeof(ib_guid_info_t));
> +
> +	context.gi_context.node_guid = osm_node_get_node_guid(p_port->p_node);
> +	context.gi_context.port_guid = osm_physp_get_port_guid(p_port->p_physp);
> +	context.gi_context.set_method = TRUE;
> +	context.gi_context.port_num = osm_physp_get_port_num(p_port->p_physp);
> +
> +	status = osm_req_set(sa->sm, osm_physp_get_dr_path_ptr(p_port->p_physp),
> +			     payload, sizeof(payload), IB_MAD_ATTR_GUID_INFO,
> +			     cl_hton32((uint32_t)block_num),
> +			     CL_DISP_MSGID_NONE, &context);
> +	if (status != IB_SUCCESS)
> +		OSM_LOG(sa->p_log, OSM_LOG_ERROR, "ERR 5109: "
> +			"Failure initiating GUIDInfo request (%s)\n",
> +			ib_get_err_str(status));
> +}
> +
> +static void del_guidinfo(IN osm_sa_t *sa, IN osm_madw_t *p_madw,
> +			 IN osm_port_t *p_port, IN uint8_t block_num)
> +{
> +	int i;
> +	ib_sa_mad_t *p_sa_mad;
> +	ib_guidinfo_record_t *p_rcvd_rec;
> +	ib_net64_t del_alias_guid;
> +	osm_alias_guid_t *p_alias_guid;
> +	uint8_t del_mask;
> +	int dirty = 0;
> +
> +	if (!p_port->p_physp->p_guids)
>  		goto Exit;
> +
> +	p_sa_mad = osm_madw_get_sa_mad_ptr(p_madw);
> +	p_rcvd_rec =
> +		(ib_guidinfo_record_t *) ib_sa_mad_get_payload_ptr(p_sa_mad);
> +
> +	del_mask = coalesce_comp_mask(p_madw);
> +
> +	for (i = block_num * GUID_TABLE_MAX_ENTRIES;
> +	     (block_num + 1) * GUID_TABLE_MAX_ENTRIES < p_port->p_physp->port_info.guid_cap ? i < (block_num + 1) * GUID_TABLE_MAX_ENTRIES : i < p_port->p_physp->port_info.guid_cap;
> +	     i++) {
> +		/* can't delete block 0 index 0 (base guid is RO) for alias guid table */
> +		if (i == 0 && p_sa_mad->comp_mask & IB_GIR_COMPMASK_GID0) {
> +			OSM_LOG(sa->p_log, OSM_LOG_DEBUG,
> +				"Not allowed to delete RO GID 0\n");
> +			osm_sa_send_error(sa, p_madw,
> +					  IB_SA_MAD_STATUS_REQ_INVALID);
> +			return;
> +		}
> +		if (!(del_mask & 1<<(i % 8)))
> +			continue;
> +
> +		del_alias_guid = (*p_port->p_physp->p_guids)[i];
> +		if (del_alias_guid) {
> +			/* remove original from alias guid table */
> +			p_alias_guid = (osm_alias_guid_t *)
> +				cl_qmap_remove(&sa->p_subn->alias_port_guid_tbl,
> +					       del_alias_guid);
> +			if (p_alias_guid != (osm_alias_guid_t *)
> +						cl_qmap_end(&sa->p_subn->alias_port_guid_tbl))
> +				osm_alias_guid_delete(&p_alias_guid);
> +			else
> +				OSM_LOG(sa->p_log, OSM_LOG_ERROR, "ERR 510B: "
> +					"Original alias GUID 0x%" PRIx64
> +					" at index %u not found\n",
> +					cl_ntoh64(del_alias_guid), i);
> +			/* clear guid at index */
> +			(*p_port->p_physp->p_guids)[i] = 0;
> +			dirty = 1;
> +		}
>  	}
>  
> -	if (osm_log_is_active(sa->p_log, OSM_LOG_DEBUG))
> +	if (dirty)
> +		guidinfo_set(sa, p_port, block_num);
> +
> +	memcpy(&p_rcvd_rec->guid_info,
> +	       &((*p_port->p_physp->p_guids)[block_num * GUID_TABLE_MAX_ENTRIES]),
> +	       sizeof(ib_guid_info_t));
> +
> +Exit:
> +	gir_respond(sa, p_madw);
> +}
> +
> +static void set_guidinfo(IN osm_sa_t *sa, IN osm_madw_t *p_madw,
> +			 IN osm_port_t *p_port, IN uint8_t block_num)
> +{
> +	uint32_t max_block;
> +	int i, j, dirty = 0;
> +	ib_sa_mad_t *p_sa_mad;
> +	ib_guidinfo_record_t *p_rcvd_rec;
> +	osm_alias_guid_t *p_alias_guid, *p_alias_guid_check;
> +	cl_map_item_t *p_item;
> +	ib_net64_t set_alias_guid, del_alias_guid, assigned_guid;
> +	uint8_t set_mask;
> +
> +	if (!p_port->p_physp->p_guids) {
> +		max_block = (p_port->p_physp->port_info.guid_cap + GUID_TABLE_MAX_ENTRIES - 1) /
> +			     GUID_TABLE_MAX_ENTRIES;
> +
> +		p_port->p_physp->p_guids = calloc(max_block * GUID_TABLE_MAX_ENTRIES,
> +						  sizeof(ib_net64_t));
> +		if (!p_port->p_physp->p_guids) {
> +			OSM_LOG(sa->p_log, OSM_LOG_ERROR, "ERR 5103: "
> +				"GUID table memory allocation failed for port "
> +				"GUID 0x%" PRIx64 "\n",
> +				cl_ntoh64(p_port->p_physp->port_guid));
> +			osm_sa_send_error(sa, p_madw,
> +					  IB_SA_MAD_STATUS_NO_RESOURCES);
> +			return;
> +		}
> +		/* setup base port guid in index 0 */
> +		(*p_port->p_physp->p_guids)[0] = p_port->p_physp->port_guid;
> +	}
> +
> +	p_sa_mad = osm_madw_get_sa_mad_ptr(p_madw);
> +	p_rcvd_rec = (ib_guidinfo_record_t *) ib_sa_mad_get_payload_ptr(p_sa_mad);
> +
> +	if (osm_log_is_active(sa->p_log, OSM_LOG_DEBUG)) {
> +		OSM_LOG(sa->p_log, OSM_LOG_DEBUG, "Dump of incoming record\n");
>  		osm_dump_guidinfo_record(sa->p_log, p_rcvd_rec, OSM_LOG_DEBUG);
> +	}
> +
> +	set_mask = coalesce_comp_mask(p_madw);
> +
> +	for (i = block_num * GUID_TABLE_MAX_ENTRIES;
> +	     (block_num + 1) * GUID_TABLE_MAX_ENTRIES < p_port->p_physp->port_info.guid_cap ? i < (block_num + 1) * GUID_TABLE_MAX_ENTRIES : i < p_port->p_physp->port_info.guid_cap;
> +	     i++) {
> +		/* can't set block 0 index 0 (base guid is RO) for alias guid table */
> +		if (i == 0 && p_sa_mad->comp_mask & IB_GIR_COMPMASK_GID0) {
> +			OSM_LOG(sa->p_log, OSM_LOG_DEBUG,
> +				"Not allowed to set RO GID 0\n");
> +			osm_sa_send_error(sa, p_madw,
> +					  IB_SA_MAD_STATUS_REQ_INVALID);
> +			return;
> +		}
> +
> +		if (!(set_mask & 1<<(i % 8)))
> +			continue;
> +
> +		set_alias_guid = p_rcvd_rec->guid_info.guid[i % 8];
> +		if (!set_alias_guid) {
> +			/* was a GUID previously assigned for this index ? */
> +			set_alias_guid = (*p_port->p_physp->p_guids)[i];
> +			if (set_alias_guid) {
> +				p_rcvd_rec->guid_info.guid[i % 8] = set_alias_guid;				
> +				continue;
> +			}
> +		}
> +		if (!set_alias_guid) {
> +			for (j = 0; j < 1000; j++) {

What is the purpose of this loop?

> +				assigned_guid = sm_assigned_guid(sa->p_subn->opt.sm_assigned_guid);
> +				if (!assigned_guid) {
> +					OSM_LOG(sa->p_log, OSM_LOG_ERROR,
> +						"ERR 510E: No more assigned guids available\n");
> +					osm_sa_send_error(sa, p_madw,
> +							  IB_SA_MAD_STATUS_NO_RESOURCES);
> +					return;
> +				}
> +				p_item = cl_qmap_get(&sa->sm->p_subn->alias_port_guid_tbl,
> +						     assigned_guid);
> +				if (p_item == cl_qmap_end(&sa->sm->p_subn->alias_port_guid_tbl)) {
> +					set_alias_guid = assigned_guid;
> +					p_rcvd_rec->guid_info.guid[i % 8] = assigned_guid;
> +					break;
> +				}
> +			}
> +			if (!set_alias_guid) {
> +				OSM_LOG(sa->p_log, OSM_LOG_ERROR, "ERR 510A: "
> +					"SA assigned GUID %d failed for "
> +					"port GUID 0x%" PRIx64 "\n", i,
> +					cl_ntoh64(p_port->p_physp->port_guid));
> +				continue;
> +			}
> +		}
> +
> +		/* allocate alias guid and add to alias guid table */
> +		p_alias_guid = osm_alias_guid_new(set_alias_guid, p_port);
> +		if (!p_alias_guid) {
> +			OSM_LOG(sa->p_log, OSM_LOG_ERROR, "ERR 5107: "
> +				"Alias guid %d memory allocation failed"
> +				" for port GUID 0x%" PRIx64 "\n",
> +				i, cl_ntoh64(p_port->p_physp->port_guid));
> +			return;
> +		}
> +
> +		p_alias_guid_check =
> +			(osm_alias_guid_t *) cl_qmap_insert(&sa->sm->p_subn->alias_port_guid_tbl,
> +							    p_alias_guid->alias_guid,
> +							    &p_alias_guid->map_item);
> +		if (p_alias_guid_check != p_alias_guid) {
> +			/* alias GUID is a duplicate */
> +			OSM_LOG(sa->p_log, OSM_LOG_ERROR, "ERR 5108: "
> +				"Duplicate alias port GUID 0x%" PRIx64
> +				" index %d base port GUID 0x%" PRIx64 "\n",
> +				cl_ntoh64(p_alias_guid->alias_guid), i,
> +				cl_ntoh64(p_alias_guid->p_base_port->guid));
> +			osm_alias_guid_delete(&p_alias_guid);
> +			/* clear response guid at index to indicate duplicate */
> +			p_rcvd_rec->guid_info.guid[i % 8] = 0;
> +		} else {
> +			del_alias_guid = (*p_port->p_physp->p_guids)[i];
> +			if (del_alias_guid) {
> +				/* remove original from alias guid table */
> +				p_alias_guid_check = (osm_alias_guid_t *)
> +					cl_qmap_remove(&sa->p_subn->alias_port_guid_tbl,
> +						       del_alias_guid);
> +				if (p_alias_guid_check)
> +					osm_alias_guid_delete(&p_alias_guid_check);
> +				else
> +					OSM_LOG(sa->p_log, OSM_LOG_ERROR,
> +						"ERR 510C: Original alias GUID "
> +						"0x%" PRIx64 "at index %u "
> +						"not found\n",
> +						cl_ntoh64(del_alias_guid),
> +						i);
> +			}
> +
> +			/* insert or replace guid at index */
> +			(*p_port->p_physp->p_guids)[i] = set_alias_guid;
> +			dirty = 1;
> +		}
> +	}
> +
> +	if (dirty)
> +		guidinfo_set(sa, p_port, block_num);
> +
> +	memcpy(&p_rcvd_rec->guid_info,
> +	       &((*p_port->p_physp->p_guids)[block_num * GUID_TABLE_MAX_ENTRIES]),
> +	       sizeof(ib_guid_info_t));
> +
> +	gir_respond(sa, p_madw);
> +}
> +
> +static void get_guidinfo(IN osm_sa_t *sa, IN osm_madw_t *p_madw,
> +			 IN osm_physp_t *p_req_physp)
> +{
> +	const ib_sa_mad_t *p_rcvd_mad;
> +	const ib_guidinfo_record_t *p_rcvd_rec;
> +	cl_qlist_t rec_list;
> +	osm_gir_search_ctxt_t context;
> +
> +	p_rcvd_mad = osm_madw_get_sa_mad_ptr(p_madw);
> +	p_rcvd_rec =
> +	    (ib_guidinfo_record_t *) ib_sa_mad_get_payload_ptr(p_rcvd_mad);
>  
>  	cl_qlist_init(&rec_list);
>  
> @@ -340,6 +638,76 @@ void osm_gir_rcv_process(IN void *ctx, IN void *data)
>  	cl_plock_release(sa->p_lock);
>  
>  	osm_sa_respond(sa, p_madw, sizeof(ib_guidinfo_record_t), &rec_list);
> +}
> +
> +void osm_gir_rcv_process(IN void *ctx, IN void *data)
> +{
> +	osm_sa_t *sa = ctx;
> +	osm_madw_t *p_madw = data;
> +	const ib_sa_mad_t *p_rcvd_mad;
> +	osm_physp_t *p_req_physp;
> +	osm_port_t *p_port;
> +	const ib_guidinfo_record_t *p_rcvd_rec;
> +
> +	CL_ASSERT(sa);
> +
> +	OSM_LOG_ENTER(sa->p_log);
> +
> +	CL_ASSERT(p_madw);
> +
> +	p_rcvd_mad = osm_madw_get_sa_mad_ptr(p_madw);
> +
> +	CL_ASSERT(p_rcvd_mad->attr_id == IB_MAD_ATTR_GUIDINFO_RECORD);
> +
> +	/* update the requester physical port */
> +	p_req_physp = osm_get_physp_by_mad_addr(sa->p_log, sa->p_subn,
> +						osm_madw_get_mad_addr_ptr(p_madw));
> +	if (p_req_physp == NULL) {
> +		OSM_LOG(sa->p_log, OSM_LOG_ERROR, "ERR 5104: "
> +			"Cannot find requester physical port\n");
> +		goto Exit;
> +	}
> +
> +	switch(p_rcvd_mad->method) {
> +	case IB_MAD_METHOD_GET:
> +	case IB_MAD_METHOD_GETTABLE:
> +		get_guidinfo(sa, p_madw, p_req_physp);
> +		break;
> +	case IB_MAD_METHOD_SET:
> +	case IB_MAD_METHOD_DELETE:
> +		if (!check_mod_comp_mask(p_rcvd_mad->comp_mask)) {
> +			OSM_LOG(sa->p_log, OSM_LOG_ERROR, "ERR 5106: "
> +				"component mask = 0x%016" PRIx64 ", "
> +                                "expected comp mask = 0x%016" PRIx64 "\n",
> +				cl_ntoh64(p_rcvd_mad->comp_mask),
> +				CL_NTOH64(MOD_GIR_COMP_MASK));
> +			osm_sa_send_error(sa, p_madw,
> +					  IB_SA_MAD_STATUS_REQ_INVALID);
> +			goto Exit;
> +		}
> +		p_rcvd_rec = (ib_guidinfo_record_t *) ib_sa_mad_get_payload_ptr(p_rcvd_mad);
> +		p_port = osm_get_port_by_lid(sa->p_subn, p_rcvd_rec->lid);
> +		if (!p_port) {
> +			OSM_LOG(sa->p_log, OSM_LOG_DEBUG,
> +				"Port with LID %u not found\n",
> +				cl_ntoh16(p_rcvd_rec->lid));

Shouldn't this be treated as error?

> +			goto Exit;
> +		}
> +		if (!osm_physp_share_pkey(sa->p_log, p_req_physp,
> +					  p_port->p_physp))
> +			goto Exit;

Why it not necessary to check that the ports have shared pkey on GET/GETTABLE methods?

> +		if (p_rcvd_mad->method == IB_MAD_METHOD_SET)
> +			set_guidinfo(sa, p_madw, p_port, p_rcvd_rec->block_num);
> +		else
> +			del_guidinfo(sa, p_madw, p_port, p_rcvd_rec->block_num);
> +		break;
> +	default:
> +		OSM_LOG(sa->p_log, OSM_LOG_ERROR, "ERR 5105: "
> +			"Unsupported Method (%s)\n",
> +			ib_get_sa_method_str(p_rcvd_mad->method));
> +		osm_sa_send_error(sa, p_madw, IB_MAD_STATUS_UNSUP_METHOD_ATTR);
> +		break;
> +	}
>  
>  Exit:
>  	OSM_LOG_EXIT(sa->p_log);
> diff --git a/opensm/osm_sm.c b/opensm/osm_sm.c
> index b8d7c55..e155576 100644
> --- a/opensm/osm_sm.c
> +++ b/opensm/osm_sm.c
> @@ -1,6 +1,6 @@
>  /*
>   * Copyright (c) 2004-2009 Voltaire, Inc. All rights reserved.
> - * Copyright (c) 2002-2005 Mellanox Technologies LTD. All rights reserved.
> + * Copyright (c) 2002-2010 Mellanox Technologies LTD. All rights reserved.
>   * Copyright (c) 1996-2003 Intel Corporation. All rights reserved.
>   * Copyright (c) 2008 Xsigo Systems Inc.  All rights reserved.
>   *
> @@ -68,6 +68,7 @@ extern void osm_nd_rcv_process(IN void *context, IN void *data);
>  extern void osm_ni_rcv_process(IN void *context, IN void *data);
>  extern void osm_pkey_rcv_process(IN void *context, IN void *data);
>  extern void osm_pi_rcv_process(IN void *context, IN void *data);
> +extern void osm_gi_rcv_process(IN void *context, IN void *data);
>  extern void osm_slvl_rcv_process(IN void *context, IN void *p_data);
>  extern void osm_sminfo_rcv_process(IN void *context, IN void *data);
>  extern void osm_si_rcv_process(IN void *context, IN void *data);
> @@ -199,6 +200,7 @@ void osm_sm_shutdown(IN osm_sm_t * p_sm)
>  	osm_sm_mad_ctrl_destroy(&p_sm->mad_ctrl);
>  	cl_disp_unregister(p_sm->ni_disp_h);
>  	cl_disp_unregister(p_sm->pi_disp_h);
> +	cl_disp_unregister(p_sm->gi_disp_h);
>  	cl_disp_unregister(p_sm->si_disp_h);
>  	cl_disp_unregister(p_sm->nd_disp_h);
>  	cl_disp_unregister(p_sm->lft_disp_h);
> @@ -321,6 +323,11 @@ ib_api_status_t osm_sm_init(IN osm_sm_t * p_sm, IN osm_subn_t * p_subn,
>  	if (p_sm->pi_disp_h == CL_DISP_INVALID_HANDLE)
>  		goto Exit;
>  
> +	p_sm->gi_disp_h = cl_disp_register(p_disp, OSM_MSG_MAD_GUID_INFO,
> +					   osm_gi_rcv_process, p_sm);
> +	if (p_sm->gi_disp_h == CL_DISP_INVALID_HANDLE)
> +		goto Exit;
> +
>  	p_sm->si_disp_h = cl_disp_register(p_disp, OSM_MSG_MAD_SWITCH_INFO,
>  					   osm_si_rcv_process, p_sm);
>  	if (p_sm->si_disp_h == CL_DISP_INVALID_HANDLE)
> diff --git a/opensm/osm_sm_mad_ctrl.c b/opensm/osm_sm_mad_ctrl.c
> index 086f71c..47fc32f 100644
> --- a/opensm/osm_sm_mad_ctrl.c
> +++ b/opensm/osm_sm_mad_ctrl.c
> @@ -1,6 +1,6 @@
>  /*
>   * Copyright (c) 2004-2009 Voltaire, Inc. All rights reserved.
> - * Copyright (c) 2002-2005 Mellanox Technologies LTD. All rights reserved.
> + * Copyright (c) 2002-2010 Mellanox Technologies LTD. All rights reserved.
>   * Copyright (c) 1996-2003 Intel Corporation. All rights reserved.
>   * Copyright (c) 2009 HNR Consulting. All rights reserved.
>   * Copyright (c) 2009 Sun Microsystems, Inc. All rights reserved.
> @@ -224,6 +224,9 @@ static void sm_mad_ctrl_process_get_resp(IN osm_sm_mad_ctrl_t * p_ctrl,
>  	case IB_MAD_ATTR_NODE_INFO:
>  		msg_id = OSM_MSG_MAD_NODE_INFO;
>  		break;
> +	case IB_MAD_ATTR_GUID_INFO:
> +		msg_id = OSM_MSG_MAD_GUID_INFO;
> +		break;
>  	case IB_MAD_ATTR_SWITCH_INFO:
>  		msg_id = OSM_MSG_MAD_SWITCH_INFO;
>  		break;
> @@ -248,7 +251,6 @@ static void sm_mad_ctrl_process_get_resp(IN osm_sm_mad_ctrl_t * p_ctrl,
>  	case IB_MAD_ATTR_P_KEY_TABLE:
>  		msg_id = OSM_MSG_MAD_PKEY;
>  		break;
> -	case IB_MAD_ATTR_GUID_INFO:
>  	case IB_MAD_ATTR_CLASS_PORT_INFO:
>  	case IB_MAD_ATTR_NOTICE:
>  	case IB_MAD_ATTR_INFORM_INFO:
> diff --git a/opensm/osm_subnet.c b/opensm/osm_subnet.c
> index 2e94aa1..34eaf29 100644
> --- a/opensm/osm_subnet.c
> +++ b/opensm/osm_subnet.c
> @@ -340,6 +340,7 @@ static const opt_rec_t opt_tbl[] = {
>  	{ "accum_log_file", OPT_OFFSET(accum_log_file), opts_parse_boolean, opts_setup_accum_log_file, 1 },
>  	{ "partition_config_file", OPT_OFFSET(partition_config_file), opts_parse_charp, NULL, 0 },
>  	{ "no_partition_enforcement", OPT_OFFSET(no_partition_enforcement), opts_parse_boolean, NULL, 1 },
> +	{ "sm_assigned_guid", OPT_OFFSET(sm_assigned_guid), opts_parse_uint8, NULL, 1 },
>  	{ "qos", OPT_OFFSET(qos), opts_parse_boolean, NULL, 1 },
>  	{ "qos_policy_file", OPT_OFFSET(qos_policy_file), opts_parse_charp, NULL, 0 },
>  	{ "dump_files_dir", OPT_OFFSET(dump_files_dir), opts_parse_charp, NULL, 0 },
> @@ -755,6 +756,7 @@ void osm_subn_set_default_opt(IN osm_subn_opt_t * p_opt)
>  	p_opt->log_max_size = 0;
>  	p_opt->partition_config_file = strdup(OSM_DEFAULT_PARTITION_CONFIG_FILE);
>  	p_opt->no_partition_enforcement = FALSE;
> +	p_opt->sm_assigned_guid = 0;
>  	p_opt->qos = FALSE;
>  	p_opt->qos_policy_file = strdup(OSM_DEFAULT_QOS_POLICY_FILE);
>  	p_opt->accum_log_file = TRUE;
> @@ -1360,9 +1362,15 @@ int osm_subn_output_conf(FILE *out, IN osm_subn_opt_t * p_opts)
>  		"# Partition configuration file to be used\n"
>  		"partition_config_file %s\n\n"
>  		"# Disable partition enforcement by switches\n"
> -		"no_partition_enforcement %s\n\n",
> +		"no_partition_enforcement %s\n\n"
> +		"# SM assigned GUID byte where GUID is formed from OpenFabrics OUI\n"
> +		"# followed by 40 bits xy 00 ab cd ef where xy is the SM assigned GUID byte\n"
> +		"# and ab cd ef is an SM autogenerated 24 bits\n"
> +		"# SM assigned GUID byte should be configured as subnet unique\n"
> +		"sm_assigned_guid 0x%02x\n\n",
>  		p_opts->partition_config_file,
> -		p_opts->no_partition_enforcement ? "TRUE" : "FALSE");
> +		p_opts->no_partition_enforcement ? "TRUE" : "FALSE",
> +		p_opts->sm_assigned_guid);
>  
>  	fprintf(out,
>  		"#\n# SWEEP OPTIONS\n#\n"
> -- 
> 1.5.3
> 
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-- Alex
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