Implementation of the osm unicast routing cache.
Signed-off-by: Yevgeny Kliteynik <[EMAIL PROTECTED]>
---
opensm/include/opensm/osm_ucast_cache.h | 439 ++++++++++++
opensm/opensm/osm_ucast_cache.c | 1176 +++++++++++++++++++++++++++++++
2 files changed, 1615 insertions(+), 0 deletions(-)
create mode 100644 opensm/include/opensm/osm_ucast_cache.h
create mode 100644 opensm/opensm/osm_ucast_cache.c
diff --git a/opensm/include/opensm/osm_ucast_cache.h
b/opensm/include/opensm/osm_ucast_cache.h
new file mode 100644
index 0000000..2dc1c4e
--- /dev/null
+++ b/opensm/include/opensm/osm_ucast_cache.h
@@ -0,0 +1,439 @@
+/*
+ * Copyright (c) 2008 Mellanox Technologies LTD. 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:
+ * Header file that describes Unicast Cache functions.
+ *
+ * Environment:
+ * Linux User Mode
+ *
+ * $Revision: 1.4 $
+ */
+
+#ifndef _OSM_UCAST_CACHE_H_
+#define _OSM_UCAST_CACHE_H_
+
+#include <iba/ib_types.h>
+#include <complib/cl_qmap.h>
+#include <opensm/osm_switch.h>
+
+#ifdef __cplusplus
+# define BEGIN_C_DECLS extern "C" {
+# define END_C_DECLS }
+#else /* !__cplusplus */
+# define BEGIN_C_DECLS
+# define END_C_DECLS
+#endif /* __cplusplus */
+
+BEGIN_C_DECLS
+
+struct osm_ucast_mgr;
+
+/****h* OpenSM/Unicast Manager/Unicast Cache
+* NAME
+* Unicast Cache
+*
+* DESCRIPTION
+* The Unicast Cache object encapsulates the information
+* needed to cache and write unicast routing of the subnet.
+*
+* The Unicast Cache object is NOT thread safe.
+*
+* This object should be treated as opaque and should be
+* manipulated only through the provided functions.
+*
+* AUTHOR
+* Yevgeny Kliteynik, Mellanox
+*
+*********/
+
+/****s* OpenSM: Unicast Cache/osm_ucast_cache_t
+* NAME
+* osm_ucast_cache_t
+*
+* DESCRIPTION
+* Unicast Cache structure.
+*
+* This object should be treated as opaque and should
+* be manipulated only through the provided functions.
+*
+* SYNOPSIS
+*/
+typedef struct _osm_ucast_cache {
+ cl_qmap_t sw_tbl;
+ boolean_t valid;
+ struct osm_ucast_mgr * p_ucast_mgr;
+} osm_ucast_cache_t;
+/*
+* FIELDS
+* sw_tbl
+* Cached switches table.
+*
+* valid
+* TRUE if the cache is valid.
+*
+* p_ucast_mgr
+* Pointer to the Unicast Manager for this subnet.
+*
+* SEE ALSO
+* Unicast Manager object
+*********/
+
+/****f* OpenSM: Unicast Cache/osm_ucast_cache_construct
+* NAME
+* osm_ucast_cache_construct
+*
+* DESCRIPTION
+* This function constructs a Unicast Cache object.
+*
+* SYNOPSIS
+*/
+osm_ucast_cache_t *
+osm_ucast_cache_construct(struct osm_ucast_mgr * const p_mgr);
+/*
+* PARAMETERS
+* p_mgr
+* [in] Pointer to a Unicast Manager object.
+*
+* RETURN VALUE
+* This function return the created Ucast Cache object on success,
+* or NULL on any error.
+*
+* NOTES
+* Allows osm_ucast_cache_destroy
+*
+* Calling osm_ucast_mgr_construct is a prerequisite to
+* calling any other method.
+*
+* SEE ALSO
+* Unicast Cache object, osm_ucast_cache_destroy
+*********/
+
+/****f* OpenSM: Unicast Cache/osm_ucast_cache_destroy
+* NAME
+* osm_ucast_cache_destroy
+*
+* DESCRIPTION
+* The osm_ucast_cache_destroy function destroys the object,
+* releasing all resources.
+*
+* SYNOPSIS
+*/
+void
+osm_ucast_cache_destroy(osm_ucast_cache_t * p_cache);
+/*
+* PARAMETERS
+* p_cache
+* [in] Pointer to the object to destroy.
+*
+* RETURN VALUE
+* This function does not return any value.
+*
+* NOTES
+* Performs any necessary cleanup of the specified
+* Unicast Cache object.
+* Further operations should not be attempted on the
+* destroyed object.
+* This function should only be called after a call to
+* osm_ucast_cache_construct.
+*
+* SEE ALSO
+* Unicast Cache object, osm_ucast_cache_construct
+*********/
+
+/****f* OpenSM: Unicast Cache/osm_ucast_cache_invalidate
+* NAME
+* osm_ucast_cache_invalidate
+*
+* DESCRIPTION
+* The osm_ucast_cache_invalidate function purges the
+* unicast cache and marks the cache as invalid.
+*
+* SYNOPSIS
+*/
+void
+osm_ucast_cache_invalidate(osm_ucast_cache_t * p_cache);
+/*
+* PARAMETERS
+* p_cache
+* [in] Pointer to the object to invalidate.
+*
+* RETURN VALUE
+* This function does not return any value.
+*
+* NOTES
+*
+* SEE ALSO
+* Unicast Cache object
+*********/
+
+/****f* OpenSM: Unicast Cache/osm_ucast_cache_validate
+* NAME
+* osm_ucast_cache_validate
+*
+* DESCRIPTION
+* The osm_ucast_cache_validate function checks
+* whether or not the cached routing can be applied
+* to the current subnet switches.
+*
+* SYNOPSIS
+*/
+void
+osm_ucast_cache_validate(osm_ucast_cache_t * p_cache);
+/*
+* PARAMETERS
+* p_cache
+* [in] Pointer to the object to check.
+*
+* RETURN VALUE
+* This function does not return any value.
+*
+* NOTES
+* This function checks the current subnet and the
+* cached links, and decides whether or not there
+* is a need to re-run unicast routing engine.
+* If the cached routing can't be applied to the
+* current subnet switches as is, cache is invalidated.
+*
+* SEE ALSO
+* Unicast Cache object
+*********/
+
+/****f* OpenSM: Unicast Cache/osm_ucast_cache_mark_valid
+* NAME
+* osm_ucast_cache_mark_valid
+*
+* DESCRIPTION
+* The osm_ucast_cache_mark_valid function marks
+* the cache as valid.
+*
+* SYNOPSIS
+*/
+void
+osm_ucast_cache_mark_valid(osm_ucast_cache_t * p_cache);
+/*
+* PARAMETERS
+* p_cache
+* [in] Pointer to the object to mark.
+*
+* RETURN VALUE
+* This function does not return any value.
+*
+* NOTES
+*
+* SEE ALSO
+* Unicast Cache object
+*********/
+
+/****f* OpenSM: Unicast Cache/osm_ucast_cache_is_valid
+* NAME
+* osm_ucast_cache_is_valid
+*
+* DESCRIPTION
+* Check whether the unicast cache is valid.
+*
+* SYNOPSIS
+*/
+boolean_t
+osm_ucast_cache_is_valid(osm_ucast_cache_t * p_cache);
+/*
+* PARAMETERS
+* p_cache
+* [in] Pointer to the object to check.
+*
+* RETURN VALUE
+* TRUE if the cache is valid, FALSE otherwise.
+*
+* NOTES
+*
+* SEE ALSO
+* Unicast Cache object
+*********/
+
+/****f* OpenSM: Unicast Cache/osm_ucast_cache_check_new_link
+* NAME
+* osm_ucast_cache_check_new_link
+*
+* DESCRIPTION
+* The osm_ucast_cache_check_new_link checks whether
+* the newly discovered link still allows us to use
+* cached unicast routing.
+*
+* SYNOPSIS
+*/
+void
+osm_ucast_cache_check_new_link(osm_ucast_cache_t * p_cache,
+ osm_node_t * p_node_1,
+ uint8_t port_num_1,
+ osm_node_t * p_node_2,
+ uint8_t port_num_2);
+/*
+* PARAMETERS
+* p_cache
+* [in] Pointer to the cache object.
+*
+* p_node_1
+* [in] Pointer to the first node of the link.
+*
+* port_num_1
+* [in] Port number on the first node of the link.
+*
+* p_node_2
+* [in] Pointer to the second node of the link.
+*
+* port_num_2
+* [in] Port number on the second node of the link.
+*
+* RETURN VALUE
+* This function does not return any value.
+*
+* NOTES
+* The function checks whether the link was previously
+* cached/dropped or is this a completely new link.
+* If it decides that the new link makes cached routing
+* invalid, the cache is purged and marked as invalid.
+*
+* SEE ALSO
+* Unicast Cache object
+*********/
+
+/****f* OpenSM: Unicast Cache/osm_ucast_cache_add_link
+* NAME
+* osm_ucast_cache_add_link
+*
+* DESCRIPTION
+* The osm_ucast_cache_add_link adds link to the cache.
+*
+* SYNOPSIS
+*/
+void
+osm_ucast_cache_add_link(osm_ucast_cache_t * p_cache,
+ osm_node_t * p_node_1,
+ uint8_t port_num_1,
+ osm_node_t * p_node_2,
+ uint8_t port_num_2);
+/*
+* PARAMETERS
+* p_cache
+* [in] Pointer to the cache object.
+*
+* p_node_1
+* [in] Pointer to the first node of the link.
+*
+* port_num_1
+* [in] Port number on the first node of the link.
+*
+* p_node_2
+* [in] Pointer to the second node of the link.
+*
+* port_num_2
+* [in] Port number on the second node of the link.
+*
+* RETURN VALUE
+* This function does not return any value.
+*
+* NOTES
+* Since the cache operates with ports and not links,
+* the function adds two port entries (both sides of the
+* link) to the cache.
+* If it decides that the dropped link makes cached routing
+* invalid, the cache is purged and marked as invalid.
+*
+* SEE ALSO
+* Unicast Cache object
+*********/
+
+/****f* OpenSM: Unicast Cache/osm_ucast_cache_add_node
+* NAME
+* osm_ucast_cache_add_node
+*
+* DESCRIPTION
+* The osm_ucast_cache_add_node adds node and all
+* its links to the cache.
+*
+* SYNOPSIS
+*/
+void
+osm_ucast_cache_add_node(osm_ucast_cache_t * p_cache,
+ osm_node_t * p_node);
+/*
+* PARAMETERS
+* p_cache
+* [in] Pointer to the cache object.
+*
+* p_node
+* [in] Pointer to the node object that should be cached.
+*
+* RETURN VALUE
+* This function does not return any value.
+*
+* NOTES
+* If the function decides that the dropped node makes cached
+* routing invalid, the cache is purged and marked as invalid.
+*
+* SEE ALSO
+* Unicast Cache object
+*********/
+
+/****f* OpenSM: Unicast Cache/osm_ucast_cache_apply
+* NAME
+* osm_ucast_cache_apply
+*
+* DESCRIPTION
+* The osm_ucast_cache_apply function writes the
+* cached unicast routing on the subnet switches.
+*
+* SYNOPSIS
+*/
+void
+osm_ucast_cache_apply(osm_ucast_cache_t * p_cache);
+/*
+* PARAMETERS
+* p_cache
+* [in] Pointer to the cache object to be used.
+*
+* RETURN VALUE
+* This function does not return any value.
+*
+* NOTES
+* Iterates through all the subnet switches and writes
+* the LFTs that were calculated during the last routing
+* engine execution to the switches.
+*
+* SEE ALSO
+* Unicast Cache object
+*********/
+
+END_C_DECLS
+#endif /* _OSM_UCAST_CACHE_H_ */
diff --git a/opensm/opensm/osm_ucast_cache.c b/opensm/opensm/osm_ucast_cache.c
new file mode 100644
index 0000000..2c2154a
--- /dev/null
+++ b/opensm/opensm/osm_ucast_cache.c
@@ -0,0 +1,1176 @@
+/*
+ * Copyright (c) 2008 Mellanox Technologies LTD. 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 OpenSM Cached Unicast Routing
+ *
+ * Environment:
+ * Linux User Mode
+ *
+ */
+
+#if HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <errno.h>
+#include <iba/ib_types.h>
+#include <complib/cl_qmap.h>
+#include <complib/cl_pool.h>
+#include <complib/cl_debug.h>
+#include <opensm/osm_opensm.h>
+#include <opensm/osm_ucast_mgr.h>
+#include <opensm/osm_ucast_cache.h>
+#include <opensm/osm_switch.h>
+#include <opensm/osm_node.h>
+#include <opensm/osm_port.h>
+
+typedef struct _cache_port {
+ boolean_t is_leaf;
+ uint16_t remote_lid_ho;
+} cache_port_t;
+
+typedef struct _cache_switch {
+ cl_map_item_t map_item;
+ boolean_t dropped;
+ uint16_t max_lid_ho;
+ uint8_t num_ports;
+ cache_port_t * ports;
+ uint16_t num_hops;
+ uint8_t ** hops;
+ uint8_t * lft;
+} cache_switch_t;
+
+/**********************************************************************
+ **********************************************************************/
+
+static uint16_t
+__cache_sw_get_base_lid_ho(cache_switch_t * p_sw)
+{
+ return p_sw->ports[0].remote_lid_ho;
+}
+
+/**********************************************************************
+ **********************************************************************/
+
+static boolean_t
+__cache_sw_is_leaf(cache_switch_t * p_sw)
+{
+ return p_sw->ports[0].is_leaf;
+}
+
+/**********************************************************************
+ **********************************************************************/
+
+static void
+__cache_sw_set_leaf(cache_switch_t * p_sw)
+{
+ p_sw->ports[0].is_leaf = TRUE;
+}
+
+/**********************************************************************
+ **********************************************************************/
+
+static cache_switch_t *
+__cache_sw_new(uint16_t lid_ho)
+{
+ cache_switch_t * p_cache_sw =
+ (cache_switch_t *)malloc(sizeof(cache_switch_t));
+ if (!p_cache_sw)
+ return NULL;
+
+ memset(p_cache_sw, 0, sizeof(cache_switch_t));
+
+ p_cache_sw->ports = (cache_port_t *)malloc(sizeof(cache_port_t));
+ if (!p_cache_sw->ports) {
+ free(p_cache_sw);
+ return NULL;
+ }
+
+ /* port[0] fields represent this switch details - lid and type */
+ p_cache_sw->ports[0].remote_lid_ho = lid_ho;
+ p_cache_sw->ports[0].is_leaf = FALSE;
+
+ return p_cache_sw;
+}
+
+/**********************************************************************
+ **********************************************************************/
+
+static void
+__cache_sw_destroy(cache_switch_t * p_sw)
+{
+ if (!p_sw)
+ return;
+
+ if (p_sw->lft)
+ free(p_sw->lft);
+ if (p_sw->hops)
+ free(p_sw->hops);
+ if (p_sw->ports)
+ free(p_sw->ports);
+ free(p_sw);
+}
+
+/**********************************************************************
+ **********************************************************************/
+
+static cache_switch_t *
+__cache_get_sw(osm_ucast_cache_t * p_cache, uint16_t lid_ho)
+{
+ cache_switch_t * p_cache_sw =
+ (cache_switch_t *)cl_qmap_get(&p_cache->sw_tbl, lid_ho);
+ if (p_cache_sw == (cache_switch_t *)cl_qmap_end(&p_cache->sw_tbl))
+ p_cache_sw = NULL;
+
+ return p_cache_sw;
+}
+
+/**********************************************************************
+ **********************************************************************/
+
+static cache_switch_t *
+__cache_get_or_add_sw(osm_ucast_cache_t * p_cache, uint16_t lid_ho)
+{
+ cache_switch_t * p_cache_sw = __cache_get_sw(p_cache, lid_ho);
+ if (!p_cache_sw) {
+ p_cache_sw = __cache_sw_new(lid_ho);
+ if (p_cache_sw)
+ cl_qmap_insert(&p_cache->sw_tbl, lid_ho,
+ &p_cache_sw->map_item);
+ }
+ return p_cache_sw;
+}
+
+/**********************************************************************
+ **********************************************************************/
+
+static void
+__cache_add_port(osm_ucast_cache_t * p_cache,
+ uint16_t lid_ho,
+ uint8_t port_num,
+ uint16_t remote_lid_ho,
+ boolean_t is_ca)
+{
+ cache_switch_t * p_cache_sw;
+
+ OSM_LOG_ENTER(p_cache->p_ucast_mgr->p_log);
+
+ if (!lid_ho || !remote_lid_ho || !port_num)
+ goto Exit;
+
+ OSM_LOG(p_cache->p_ucast_mgr->p_log, OSM_LOG_VERBOSE,
+ "Caching switch port: lid %u [port %u] -> lid %u (%s)\n",
+ lid_ho, port_num, remote_lid_ho,
+ (is_ca)? "CA/RTR" : "SW");
+
+ p_cache_sw = __cache_get_or_add_sw(p_cache, lid_ho);
+ if (!p_cache_sw) {
+ OSM_LOG(p_cache->p_ucast_mgr->p_log, OSM_LOG_ERROR,
+ "ERR AD01: Out of memory - cache is invalid\n");
+ osm_ucast_cache_invalidate(p_cache);
+ goto Exit;
+ }
+
+ if (port_num >= p_cache_sw->num_ports) {
+ cache_port_t * ports = (cache_port_t *)
+ malloc(sizeof(cache_port_t)*(port_num+1));
+ memset(ports, 0, sizeof(cache_port_t)*(port_num+1));
+
+ if (p_cache_sw->ports) {
+ memcpy(ports, p_cache_sw->ports,
+ sizeof(cache_port_t)*(p_cache_sw->num_ports+1));
+ free(p_cache_sw->ports);
+ }
+
+ p_cache_sw->ports = ports;
+ p_cache_sw->num_ports = port_num + 1;
+ }
+
+ if (is_ca)
+ __cache_sw_set_leaf(p_cache_sw);
+
+ if (p_cache_sw->ports[port_num].remote_lid_ho == 0) {
+ /* cache this link only if it hasn't been already cached */
+ p_cache_sw->ports[port_num].remote_lid_ho = remote_lid_ho;
+ p_cache_sw->ports[port_num].is_leaf = is_ca;
+ }
+Exit:
+ OSM_LOG_EXIT(p_cache->p_ucast_mgr->p_log);
+}
+
+/**********************************************************************
+ **********************************************************************/
+
+static void
+__cache_cleanup_switches(osm_ucast_cache_t * p_cache)
+{
+ cache_switch_t * p_sw;
+ cache_switch_t * p_next_sw;
+ unsigned port_num;
+ boolean_t found_port;
+
+ CL_ASSERT(p_cache);
+ if (!p_cache->valid)
+ return;
+
+ p_next_sw = (cache_switch_t *) cl_qmap_head(&p_cache->sw_tbl);
+ while (p_next_sw != (cache_switch_t *) cl_qmap_end(&p_cache->sw_tbl)) {
+ p_sw = p_next_sw;
+ p_next_sw = (cache_switch_t *) cl_qmap_next(&p_sw->map_item);
+
+ found_port = FALSE;
+ for (port_num = 1; port_num < p_sw->num_ports; port_num++)
+ if (p_sw->ports[port_num].remote_lid_ho)
+ found_port = TRUE;
+
+ if (!found_port) {
+ cl_qmap_remove_item(&p_cache->sw_tbl, &p_sw->map_item);
+ __cache_sw_destroy(p_sw);
+ }
+ }
+}
+
+/**********************************************************************
+ **********************************************************************/
+
+static void
+__cache_check_link_change(osm_ucast_cache_t * p_cache,
+ osm_physp_t * p_physp_1,
+ osm_physp_t * p_physp_2)
+{
+ OSM_LOG_ENTER(p_cache->p_ucast_mgr->p_log);
+ CL_ASSERT(p_physp_1 && p_physp_2);
+
+ if (!p_cache->valid)
+ goto Exit;
+
+ if (!p_physp_1->p_remote_physp && !p_physp_2->p_remote_physp)
+ /* both ports were down - new link */
+ goto Exit;
+
+ /* unicast cache cannot tolerate any link location change */
+
+ if ((p_physp_1->p_remote_physp &&
+ p_physp_1->p_remote_physp->p_remote_physp) ||
+ (p_physp_2->p_remote_physp &&
+ p_physp_2->p_remote_physp->p_remote_physp)) {
+ OSM_LOG(p_cache->p_ucast_mgr->p_log, OSM_LOG_INFO,
+ "Link location change discovered - cache is invalid\n");
+ osm_ucast_cache_invalidate(p_cache);
+ goto Exit;
+ }
+Exit:
+ OSM_LOG_EXIT(p_cache->p_ucast_mgr->p_log);
+}
+
+/**********************************************************************
+ **********************************************************************/
+
+static void
+__cache_remove_port(osm_ucast_cache_t * p_cache,
+ uint16_t lid_ho,
+ uint8_t port_num,
+ uint16_t remote_lid_ho,
+ boolean_t is_ca)
+{
+ cache_switch_t * p_cache_sw;
+
+ OSM_LOG_ENTER(p_cache->p_ucast_mgr->p_log);
+
+ if (!p_cache->valid)
+ goto Exit;
+
+ p_cache_sw = __cache_get_sw(p_cache, lid_ho);
+ if (!p_cache_sw) {
+ OSM_LOG(p_cache->p_ucast_mgr->p_log, OSM_LOG_INFO,
+ "Found uncached switch/link (lid %u, port %u) - "
+ "cache is invalid\n", lid_ho, port_num);
+ osm_ucast_cache_invalidate(p_cache);
+ goto Exit;
+ }
+
+ if (port_num >= p_cache_sw->num_ports ||
+ !p_cache_sw->ports[port_num].remote_lid_ho) {
+ OSM_LOG(p_cache->p_ucast_mgr->p_log, OSM_LOG_INFO,
+ "Found uncached switch link (lid %u, port %u) - "
+ "cache is invalid\n", lid_ho, port_num);
+ osm_ucast_cache_invalidate(p_cache);
+ goto Exit;
+ }
+
+ if (p_cache_sw->ports[port_num].remote_lid_ho != remote_lid_ho) {
+ OSM_LOG(p_cache->p_ucast_mgr->p_log, OSM_LOG_INFO,
+ "Remote lid change on switch lid %u, port %u"
+ "(was %u, now %u) - cache is invalid\n",
+ lid_ho, port_num,
+ p_cache_sw->ports[port_num].remote_lid_ho,
+ remote_lid_ho);
+ osm_ucast_cache_invalidate(p_cache);
+ goto Exit;
+ }
+
+ if ((p_cache_sw->ports[port_num].is_leaf && !is_ca) ||
+ (!p_cache_sw->ports[port_num].is_leaf && is_ca)) {
+ OSM_LOG(p_cache->p_ucast_mgr->p_log, OSM_LOG_INFO,
+ "Remote node type change on switch lid %u, port %u - "
+ "cache is invalid\n",
+ lid_ho, port_num);
+ osm_ucast_cache_invalidate(p_cache);
+ goto Exit;
+ }
+
+ OSM_LOG(p_cache->p_ucast_mgr->p_log, OSM_LOG_VERBOSE,
+ "New link from lid %u, port %u to lid %u - "
+ "found in cache\n",
+ lid_ho, port_num, remote_lid_ho);
+
+ /* the new link was cached - clean it from the cache */
+
+ p_cache_sw->ports[port_num].remote_lid_ho = 0;
+ p_cache_sw->ports[port_num].is_leaf = FALSE;
+Exit:
+ OSM_LOG_EXIT(p_cache->p_ucast_mgr->p_log);
+} /* __cache_remove_port() */
+
+/**********************************************************************
+ **********************************************************************/
+
+static void
+__cache_restore_ucast_info(osm_ucast_cache_t * p_cache,
+ cache_switch_t * p_cache_sw,
+ osm_switch_t * p_sw)
+{
+ if (!p_cache->valid)
+ return;
+
+ /* when seting unicast info, the cached port
+ should have all the required info */
+ CL_ASSERT(p_cache_sw->max_lid_ho && p_cache_sw->lft &&
+ p_cache_sw->num_hops && p_cache_sw->hops);
+
+ p_sw->max_lid_ho = p_cache_sw->max_lid_ho;
+
+ if (p_sw->lft_buf)
+ free(p_sw->lft_buf);
+ p_sw->lft_buf = p_cache_sw->lft;
+ p_cache_sw->lft = NULL;
+
+ p_sw->num_hops = p_cache_sw->num_hops;
+ p_cache_sw->num_hops = 0;
+ if (p_sw->hops)
+ free(p_sw->hops);
+ p_sw->hops = p_cache_sw->hops;
+ p_cache_sw->hops = NULL;
+}
+
+/**********************************************************************
+ **********************************************************************/
+
+static void
+__ucast_cache_dump(osm_ucast_cache_t * p_cache)
+{
+ cache_switch_t * p_sw;
+ unsigned i;
+
+ OSM_LOG_ENTER(p_cache->p_ucast_mgr->p_log);
+
+ if (!osm_log_is_active(p_cache->p_ucast_mgr->p_log, OSM_LOG_VERBOSE))
+ goto Exit;
+
+ OSM_LOG(p_cache->p_ucast_mgr->p_log, OSM_LOG_VERBOSE,
+ "Dumping missing nodes/links as logged by unicast cache:\n");
+ for (p_sw = (cache_switch_t *) cl_qmap_head(&p_cache->sw_tbl);
+ p_sw != (cache_switch_t *) cl_qmap_end(&p_cache->sw_tbl);
+ p_sw = (cache_switch_t *) cl_qmap_next(&p_sw->map_item)) {
+
+ OSM_LOG(p_cache->p_ucast_mgr->p_log, OSM_LOG_VERBOSE,
+ "\t Switch lid %u %s%s\n",
+ __cache_sw_get_base_lid_ho(p_sw),
+ (__cache_sw_is_leaf(p_sw))? "[leaf switch] " : "",
+ (p_sw->dropped)? "[whole switch missing]" : "");
+
+ for (i = 1; i < p_sw->num_ports; i++)
+ if (p_sw->ports[i].remote_lid_ho > 0)
+ OSM_LOG(p_cache->p_ucast_mgr->p_log,
+ OSM_LOG_VERBOSE,
+ "\t - port %u -> lid %u %s\n",
+ i, p_sw->ports[i].remote_lid_ho,
+ (p_sw->ports[i].is_leaf) ?
+ "[remote node is leaf]" : "");
+ }
+Exit:
+ OSM_LOG_EXIT(p_cache->p_ucast_mgr->p_log);
+}
+
+/**********************************************************************
+ **********************************************************************/
+
+osm_ucast_cache_t *
+osm_ucast_cache_construct(osm_ucast_mgr_t * const p_mgr)
+{
+ osm_ucast_cache_t * p_cache = (osm_ucast_cache_t *)
+ malloc(sizeof(osm_ucast_cache_t));
+ if (!p_cache)
+ return NULL;
+
+ memset(p_cache, 0, sizeof(osm_ucast_cache_t));
+ cl_qmap_init(&p_cache->sw_tbl);
+ p_cache->p_ucast_mgr = p_mgr;
+ return p_cache;
+}
+
+/**********************************************************************
+ **********************************************************************/
+
+void
+osm_ucast_cache_destroy(osm_ucast_cache_t * p_cache)
+{
+ if (!p_cache)
+ return;
+ osm_ucast_cache_invalidate(p_cache);
+ free(p_cache);
+}
+
+/**********************************************************************
+ **********************************************************************/
+
+void
+osm_ucast_cache_mark_valid(osm_ucast_cache_t * p_cache)
+{
+ CL_ASSERT(p_cache && p_cache->p_ucast_mgr);
+ p_cache->valid = TRUE;
+}
+
+/**********************************************************************
+ **********************************************************************/
+
+boolean_t
+osm_ucast_cache_is_valid(osm_ucast_cache_t * p_cache)
+{
+ CL_ASSERT(p_cache && p_cache->p_ucast_mgr);
+ return p_cache->valid;
+}
+
+/**********************************************************************
+ **********************************************************************/
+
+void
+osm_ucast_cache_invalidate(osm_ucast_cache_t * p_cache)
+{
+ cache_switch_t * p_sw;
+ cache_switch_t * p_next_sw;
+
+ CL_ASSERT(p_cache);
+
+ OSM_LOG_ENTER(p_cache->p_ucast_mgr->p_log);
+ OSM_LOG(p_cache->p_ucast_mgr->p_log, OSM_LOG_VERBOSE,
+ "Invalidating unicast cache\n");
+
+ if (!p_cache->valid)
+ goto Exit;
+
+ p_cache->valid = FALSE;
+
+ p_next_sw = (cache_switch_t *) cl_qmap_head(&p_cache->sw_tbl);
+ while (p_next_sw != (cache_switch_t *) cl_qmap_end(&p_cache->sw_tbl)) {
+ p_sw = p_next_sw;
+ p_next_sw = (cache_switch_t *) cl_qmap_next(&p_sw->map_item);
+ __cache_sw_destroy(p_sw);
+ }
+ cl_qmap_remove_all(&p_cache->sw_tbl);
+Exit:
+ OSM_LOG_EXIT(p_cache->p_ucast_mgr->p_log);
+}
+
+/**********************************************************************
+ **********************************************************************/
+
+void
+osm_ucast_cache_validate(osm_ucast_cache_t * p_cache)
+{
+ cache_switch_t * p_cache_sw;
+ cache_switch_t * p_remote_cache_sw;
+ unsigned port_num;
+ unsigned max_ports;
+ uint8_t remote_node_type;
+ uint16_t lid_ho;
+ uint16_t remote_lid_ho;
+ osm_switch_t * p_sw;
+ osm_switch_t * p_remote_sw;
+ osm_node_t * p_node;
+ osm_physp_t * p_physp;
+ osm_physp_t * p_remote_physp;
+ osm_port_t * p_remote_port;
+ cl_qmap_t * p_node_guid_tbl;
+
+ OSM_LOG_ENTER(p_cache->p_ucast_mgr->p_log);
+ if (!p_cache->valid)
+ goto Exit;
+
+ /*
+ * Scan all the physical switch ports in the subnet.
+ * If the port need_update flag is on, check whether
+ * it's just some node/port reset or a cached topology
+ * change. Otherwise the cache is invalid.
+ */
+ p_node_guid_tbl = &p_cache->p_ucast_mgr->p_subn->node_guid_tbl;
+ for (p_node = (osm_node_t *) cl_qmap_head(p_node_guid_tbl);
+ p_node != (osm_node_t *) cl_qmap_end(p_node_guid_tbl);
+ p_node = (osm_node_t *) cl_qmap_next(&p_node->map_item)) {
+
+ if (osm_node_get_type(p_node) != IB_NODE_TYPE_SWITCH)
+ continue;
+
+ lid_ho = cl_ntoh16(osm_node_get_base_lid(p_node,0));
+ p_cache_sw = __cache_get_sw(p_cache, lid_ho);
+
+ p_sw = p_node->sw;
+ max_ports = osm_node_get_num_physp(p_node);
+
+ /* skip port 0 */
+ for (port_num = 1; port_num < max_ports; port_num++) {
+
+ p_physp = osm_node_get_physp_ptr(p_node, port_num);
+
+ if (!p_physp || !p_physp->p_remote_physp ||
+ !osm_physp_link_exists(p_physp,
p_physp->p_remote_physp))
+ /* no valid link */
+ continue;
+
+ /*
+ * While scanning all the physical ports in the subnet,
+ * mark corresponding leaf switches in the cache.
+ */
+ if (p_cache_sw &&
+ !p_cache_sw->dropped &&
+ !__cache_sw_is_leaf(p_cache_sw) &&
+ p_physp->p_remote_physp->p_node &&
+ osm_node_get_type(
+ p_physp->p_remote_physp->p_node) !=
+ IB_NODE_TYPE_SWITCH)
+ __cache_sw_set_leaf(p_cache_sw);
+
+ if (!p_physp->need_update)
+ continue;
+
+ OSM_LOG(p_cache->p_ucast_mgr->p_log, OSM_LOG_VERBOSE,
+ "Checking switch lid %u, port %u\n",
+ lid_ho, port_num);
+
+ p_remote_physp = osm_physp_get_remote(p_physp);
+ remote_node_type =
osm_node_get_type(p_remote_physp->p_node);
+
+ if (remote_node_type == IB_NODE_TYPE_SWITCH)
+ remote_lid_ho = cl_ntoh16(osm_node_get_base_lid(
+ p_remote_physp->p_node, 0));
+ else
+ remote_lid_ho = cl_ntoh16(osm_node_get_base_lid(
+ p_remote_physp->p_node,
+
osm_physp_get_port_num(p_remote_physp)));
+
+ if (!p_cache_sw ||
+ port_num >= p_cache_sw->num_ports ||
+ !p_cache_sw->ports[port_num].remote_lid_ho) {
+ /*
+ * There is some uncached change on the port.
+ * In general, the reasons might be as follows:
+ * - switch reset
+ * - port reset (or port down/up)
+ * - quick connection location change
+ * - new link (or new switch)
+ *
+ * First two reasons allow cache usage, while
+ * the last two reasons should invalidate cache.
+ *
+ * In case of quick connection location change,
+ * cache would have been invalidated by
+ * osm_ucast_cache_check_new_link() function.
+ *
+ * In case of new link between two known nodes,
+ * cache also would have been invalidated by
+ * osm_ucast_cache_check_new_link() function.
+ *
+ * Another reason is cached link between two
+ * known switches went back. In this case the
+ * osm_ucast_cache_check_new_link() function
would
+ * clear both sides of the link from the cache
+ * during the discovery process, so effectively
+ * this would be equivalent to port reset.
+ *
+ * So three possible reasons remain:
+ * - switch reset
+ * - port reset (or port down/up)
+ * - link of a new switch
+ *
+ * To validate cache, we need to check only the
+ * third reason - link of a new node/switch:
+ * - If this is the local switch that is new,
+ * then it should have (p_sw->need_update ==
2).
+ * - If the remote node is switch and it's new,
+ * then it also should have
+ * (p_sw->need_update == 2).
+ * - If the remote node is CA/RTR and it's new,
+ * then its port should have is_new flag on.
+ */
+ if (p_sw->need_update == 2) {
+ OSM_LOG(p_cache->p_ucast_mgr->p_log,
OSM_LOG_INFO,
+ "New switch found (lid %u) - "
+ "cache is invalid\n",
+ lid_ho);
+ osm_ucast_cache_invalidate(p_cache);
+ goto Exit;
+ }
+
+ if (remote_node_type == IB_NODE_TYPE_SWITCH) {
+
+ p_remote_sw =
p_remote_physp->p_node->sw;
+ if (p_remote_sw->need_update == 2) {
+ /* this could also be case of
+ switch coming back with an
+ additional link that it
+ didn't have before */
+
OSM_LOG(p_cache->p_ucast_mgr->p_log, OSM_LOG_INFO,
+ "New switch/link found
(lid %u) - "
+ "cache is invalid\n",
+ remote_lid_ho);
+
osm_ucast_cache_invalidate(p_cache);
+ goto Exit;
+ }
+ }
+ else {
+ /*
+ * Remote node is CA/RTR.
+ * Get p_port of the remote node and
+ * check its p_port->is_new flag.
+ */
+ p_remote_port = osm_get_port_by_guid(
+ p_cache->p_ucast_mgr->p_subn,
+
osm_physp_get_port_guid(p_remote_physp));
+ if (p_remote_port->is_new) {
+
OSM_LOG(p_cache->p_ucast_mgr->p_log, OSM_LOG_INFO,
+ "New CA/RTR found (lid
%u) - "
+ "cache is invalid\n",
+ remote_lid_ho);
+
osm_ucast_cache_invalidate(p_cache);
+ goto Exit;
+ }
+ }
+ }
+ else {
+ /*
+ * The change on the port is cached.
+ * In general, the reasons might be as follows:
+ * - link between two known nodes went back
+ * - one or more nodes went back, causing all
+ * the links to reappear
+ *
+ * If it was link that went back, then this case
+ * would have been taken care of during the
+ * discovery by
osm_ucast_cache_check_new_link(),
+ * so it's some node that went back.
+ */
+ if ((p_cache_sw->ports[port_num].is_leaf &&
+ remote_node_type == IB_NODE_TYPE_SWITCH) ||
+ (!p_cache_sw->ports[port_num].is_leaf &&
+ remote_node_type != IB_NODE_TYPE_SWITCH)) {
+ OSM_LOG(p_cache->p_ucast_mgr->p_log,
OSM_LOG_INFO,
+ "Remote node type change on
switch lid %u, port %u - "
+ "cache is invalid\n",
+ lid_ho, port_num);
+ osm_ucast_cache_invalidate(p_cache);
+ goto Exit;
+ }
+
+ if (p_cache_sw->ports[port_num].remote_lid_ho !=
+ remote_lid_ho) {
+ OSM_LOG(p_cache->p_ucast_mgr->p_log,
OSM_LOG_INFO,
+ "Remote lid change on switch
lid %u, port %u"
+ "(was %u, now %u) - cache is
invalid\n",
+ lid_ho, port_num,
+
p_cache_sw->ports[port_num].remote_lid_ho,
+ remote_lid_ho);
+ osm_ucast_cache_invalidate(p_cache);
+ goto Exit;
+ }
+
+ /*
+ * We don't care who is the node that has
+ * reappeared in the subnet (local or remote).
+ * What's important that the cached link matches
+ * the real fabrics link.
+ * Just clean it from cache.
+ */
+
+ p_cache_sw->ports[port_num].remote_lid_ho = 0;
+ p_cache_sw->ports[port_num].is_leaf = FALSE;
+ if (p_cache_sw->dropped) {
+ __cache_restore_ucast_info(
+ p_cache, p_cache_sw, p_sw);
+ p_cache_sw->dropped = FALSE;
+ }
+
+ OSM_LOG(p_cache->p_ucast_mgr->p_log,
OSM_LOG_VERBOSE,
+ "Restored link from cache: lid %u, port
%u to lid %u\n",
+ lid_ho, port_num, remote_lid_ho);
+ }
+ }
+ }
+
+ /* Remove all the cached switches that
+ have all their ports restored */
+ __cache_cleanup_switches(p_cache);
+
+ /*
+ * Done scanning all the physical switch ports in the subnet.
+ * Now we need to check the other side:
+ * Scan all the cached switches and their ports:
+ * - If the cached switch is missing in the subnet
+ * (dropped flag is on), check that it's a leaf switch.
+ * If it's not a leaf, the cache is invalid, because
+ * cache can tolerate only leaf switch removal.
+ * - If the cached switch exists in fabric, check all
+ * its cached ports. These cached ports represent
+ * missing link in the fabric.
+ * The missing links that can be tolerated are:
+ * + link to missing CA/RTR
+ * + link to missing leaf switch
+ */
+ for (p_cache_sw = (cache_switch_t *) cl_qmap_head(&p_cache->sw_tbl);
+ p_cache_sw != (cache_switch_t *) cl_qmap_end(&p_cache->sw_tbl);
+ p_cache_sw = (cache_switch_t *)
cl_qmap_next(&p_cache_sw->map_item)) {
+
+ if (p_cache_sw->dropped) {
+ if (!__cache_sw_is_leaf(p_cache_sw)){
+ OSM_LOG(p_cache->p_ucast_mgr->p_log,
OSM_LOG_INFO,
+ "Missing non-leaf switch (lid %u) - "
+ "cache is invalid\n",
+ __cache_sw_get_base_lid_ho(p_cache_sw));
+ osm_ucast_cache_invalidate(p_cache);
+ goto Exit;
+ }
+
+ OSM_LOG(p_cache->p_ucast_mgr->p_log, OSM_LOG_VERBOSE,
+ "Missing leaf switch (lid %u) - "
+ "continuing validation\n",
+ __cache_sw_get_base_lid_ho(p_cache_sw));
+ continue;
+ }
+
+ for (port_num = 1; port_num < p_cache_sw->num_ports;
port_num++) {
+ if (!p_cache_sw->ports[port_num].remote_lid_ho)
+ continue;
+
+ if (p_cache_sw->ports[port_num].is_leaf){
+ CL_ASSERT(__cache_sw_is_leaf(p_cache_sw));
+ OSM_LOG(p_cache->p_ucast_mgr->p_log,
OSM_LOG_VERBOSE,
+ "Switch lid %u, port %u: missing link
to CA/RTR - "
+ "continuing validation\n",
+ __cache_sw_get_base_lid_ho(p_cache_sw),
port_num);
+ continue;
+ }
+
+ p_remote_cache_sw = __cache_get_sw(p_cache,
+ p_cache_sw->ports[port_num].remote_lid_ho);
+
+ if (!p_remote_cache_sw || !p_remote_cache_sw->dropped) {
+ OSM_LOG(p_cache->p_ucast_mgr->p_log,
OSM_LOG_INFO,
+ "Switch lid %u, port %u: missing link
to existing switch - "
+ "cache is invalid\n",
+ __cache_sw_get_base_lid_ho(p_cache_sw),
port_num);
+ osm_ucast_cache_invalidate(p_cache);
+ goto Exit;
+ }
+
+ if (!__cache_sw_is_leaf(p_remote_cache_sw)) {
+ OSM_LOG(p_cache->p_ucast_mgr->p_log,
OSM_LOG_INFO,
+ "Switch lid %u, port %u: missing link
to non-leaf switch - "
+ "cache is invalid\n",
+ __cache_sw_get_base_lid_ho(p_cache_sw),
port_num);
+ osm_ucast_cache_invalidate(p_cache);
+ goto Exit;
+ }
+
+ /*
+ * At this point we know that the missing link is to
+ * a leaf switch. However, one case deserves a special
+ * treatment. If there was a link between two leaf
+ * switches, then missing leaf switch might break
+ * routing. It is possible that there are routes
+ * that use leaf switches to get from switch to switch
+ * and not just to get to the CAs behind the leaf
switch.
+ */
+ if (__cache_sw_is_leaf(p_cache_sw) &&
+ __cache_sw_is_leaf(p_remote_cache_sw)) {
+ OSM_LOG(p_cache->p_ucast_mgr->p_log,
OSM_LOG_INFO,
+ "Switch lid %u, port %u: missing
leaf-2-leaf link - "
+ "cache is invalid\n",
+ __cache_sw_get_base_lid_ho(p_cache_sw),
port_num);
+ osm_ucast_cache_invalidate(p_cache);
+ goto Exit;
+ }
+
+ OSM_LOG(p_cache->p_ucast_mgr->p_log, OSM_LOG_VERBOSE,
+ "Switch lid %u, port %u: missing remote leaf
switch - "
+ "continuing validation\n",
+ __cache_sw_get_base_lid_ho(p_cache_sw),
port_num);
+ }
+ }
+
+ OSM_LOG(p_cache->p_ucast_mgr->p_log, OSM_LOG_VERBOSE,
+ "Unicast cache is valid\n");
+ __ucast_cache_dump(p_cache);
+Exit:
+ OSM_LOG_EXIT(p_cache->p_ucast_mgr->p_log);
+} /* osm_ucast_cache_validate() */
+
+/**********************************************************************
+ **********************************************************************/
+
+void
+osm_ucast_cache_check_new_link(osm_ucast_cache_t * p_cache,
+ osm_node_t * p_node_1,
+ uint8_t port_num_1,
+ osm_node_t * p_node_2,
+ uint8_t port_num_2)
+{
+ uint16_t lid_ho_1;
+ uint16_t lid_ho_2;
+
+ OSM_LOG_ENTER(p_cache->p_ucast_mgr->p_log);
+
+ if (!p_cache->valid)
+ goto Exit;
+
+ __cache_check_link_change(p_cache,
+ osm_node_get_physp_ptr(p_node_1, port_num_1),
+ osm_node_get_physp_ptr(p_node_2, port_num_2));
+
+ if (!p_cache->valid)
+ goto Exit;
+
+ if (osm_node_get_type(p_node_1) != IB_NODE_TYPE_SWITCH &&
+ osm_node_get_type(p_node_2) != IB_NODE_TYPE_SWITCH) {
+ OSM_LOG(p_cache->p_ucast_mgr->p_log, OSM_LOG_INFO,
+ "Found CA/RTR-2-CA/RTR link - cache is invalid\n");
+ osm_ucast_cache_invalidate(p_cache);
+ goto Exit;
+ }
+
+ /* for code simplicity, we want the first node to be switch */
+ if (osm_node_get_type(p_node_1) != IB_NODE_TYPE_SWITCH) {
+ osm_node_t * tmp_node = p_node_1;
+ uint8_t tmp_port_num = port_num_1;
+ p_node_1 = p_node_2;
+ port_num_1 = port_num_2;
+ p_node_2 = tmp_node;
+ port_num_2 = tmp_port_num;
+ }
+
+ lid_ho_1 = cl_ntoh16(osm_node_get_base_lid(p_node_1, 0));
+
+ if (osm_node_get_type(p_node_2) == IB_NODE_TYPE_SWITCH)
+ lid_ho_2 = cl_ntoh16(
+ osm_node_get_base_lid(p_node_2, 0));
+ else
+ lid_ho_2 = cl_ntoh16(
+ osm_node_get_base_lid(p_node_2, port_num_2));
+
+ if (!lid_ho_1 || !lid_ho_2) {
+ /*
+ * No lid assigned, which means that one of the nodes is new.
+ * Need to wait for lid manager to process this node.
+ * The switches and their links will be checked later when
+ * the whole cache validity will be verified.
+ */
+ OSM_LOG(p_cache->p_ucast_mgr->p_log, OSM_LOG_VERBOSE,
+ "Link port %u <-> %u reveals new node - cache will "
+ "be validated later\n",
+ port_num_1, port_num_2);
+ goto Exit;
+ }
+
+ __cache_remove_port(p_cache, lid_ho_1, port_num_1, lid_ho_2,
+ (osm_node_get_type(p_node_2) != IB_NODE_TYPE_SWITCH));
+
+ /* if node_2 is a switch, the link should be cleaned from its cache */
+
+ if (osm_node_get_type(p_node_2) == IB_NODE_TYPE_SWITCH)
+ __cache_remove_port(p_cache, lid_ho_2,
+ port_num_2, lid_ho_1, FALSE);
+
+Exit:
+ OSM_LOG_EXIT(p_cache->p_ucast_mgr->p_log);
+} /* osm_ucast_cache_check_new_link() */
+
+/**********************************************************************
+ **********************************************************************/
+
+void
+osm_ucast_cache_add_link(osm_ucast_cache_t * p_cache,
+ osm_node_t * p_node_1,
+ uint8_t port_num_1,
+ osm_node_t * p_node_2,
+ uint8_t port_num_2)
+{
+ uint16_t lid_ho_1;
+ uint16_t lid_ho_2;
+
+ OSM_LOG_ENTER(p_cache->p_ucast_mgr->p_log);
+
+ if (!p_cache->valid)
+ goto Exit;
+
+ if (osm_node_get_type(p_node_1) != IB_NODE_TYPE_SWITCH &&
+ osm_node_get_type(p_node_2) != IB_NODE_TYPE_SWITCH) {
+ OSM_LOG(p_cache->p_ucast_mgr->p_log, OSM_LOG_INFO,
+ "Dropping CA-2-CA link - cache invalid\n");
+ osm_ucast_cache_invalidate(p_cache);
+ goto Exit;
+ }
+
+ if (((osm_node_get_type(p_node_1) == IB_NODE_TYPE_SWITCH) &&
+ (!osm_node_get_physp_ptr(p_node_1, 0) ||
+ !osm_physp_is_valid(osm_node_get_physp_ptr(p_node_1, 0)))) ||
+ ((osm_node_get_type(p_node_2) == IB_NODE_TYPE_SWITCH) &&
+ (!osm_node_get_physp_ptr(p_node_2, 0) ||
+ !osm_physp_is_valid(osm_node_get_physp_ptr(p_node_2, 0))))) {
+ /* we're caching a link when one of the nodes
+ has already been dropped and cached */
+ OSM_LOG(p_cache->p_ucast_mgr->p_log, OSM_LOG_VERBOSE,
+ "Port %u <-> port %u: port0 on one of the nodes"
+ "has already been dropped and cached\n",
+ port_num_1, port_num_2);
+ goto Exit;
+ }
+
+ /* One of the nodes is switch. Just for code
+ simplicity, make sure that it's the first node. */
+
+ if (osm_node_get_type(p_node_1) != IB_NODE_TYPE_SWITCH) {
+ osm_node_t * tmp_node = p_node_1;
+ uint8_t tmp_port_num = port_num_1;
+ p_node_1 = p_node_2;
+ port_num_1 = port_num_2;
+ p_node_2 = tmp_node;
+ port_num_2 = tmp_port_num;
+ }
+
+ if (!p_node_1->sw) {
+ /* something is wrong - we'd better not use cache */
+ osm_ucast_cache_invalidate(p_cache);
+ goto Exit;
+ }
+
+ lid_ho_1 = cl_ntoh16(osm_node_get_base_lid(p_node_1,0));
+
+ if (osm_node_get_type(p_node_2) == IB_NODE_TYPE_SWITCH) {
+
+ if (!p_node_2->sw) {
+ /* something is wrong - we'd better not use cache */
+ osm_ucast_cache_invalidate(p_cache);
+ goto Exit;
+ }
+
+ lid_ho_2 = cl_ntoh16(osm_node_get_base_lid(p_node_2,0));
+
+ /* lost switch-2-switch link - cache both sides */
+ __cache_add_port(p_cache, lid_ho_1, port_num_1,
+ lid_ho_2, FALSE);
+ __cache_add_port(p_cache, lid_ho_2, port_num_2,
+ lid_ho_1, FALSE);
+ }
+ else {
+ lid_ho_2 = cl_ntoh16(
+ osm_node_get_base_lid(p_node_2, port_num_2));
+
+ /* lost link to CA/RTR - cache only switch side */
+ __cache_add_port(p_cache, lid_ho_1, port_num_1,
+ lid_ho_2, TRUE);
+ }
+
+Exit:
+ OSM_LOG_EXIT(p_cache->p_ucast_mgr->p_log);
+} /* osm_ucast_cache_add_link() */
+
+/**********************************************************************
+ **********************************************************************/
+
+void
+osm_ucast_cache_add_node(osm_ucast_cache_t * p_cache,
+ osm_node_t * p_node)
+{
+ uint16_t lid_ho;
+ uint8_t max_ports;
+ uint8_t port_num;
+ osm_physp_t * p_physp;
+ osm_node_t * p_remote_node;
+ cache_switch_t * p_cache_sw;
+
+ OSM_LOG_ENTER(p_cache->p_ucast_mgr->p_log);
+
+ if (!p_cache->valid)
+ goto Exit;
+
+ if (osm_node_get_type(p_node) == IB_NODE_TYPE_SWITCH) {
+
+ lid_ho = cl_ntoh16(osm_node_get_base_lid(p_node,0));
+
+ OSM_LOG(p_cache->p_ucast_mgr->p_log, OSM_LOG_VERBOSE,
+ "Caching dropped switch lid %u\n", lid_ho);
+
+ if (!p_node->sw) {
+ /* something is wrong - forget about cache */
+ OSM_LOG(p_cache->p_ucast_mgr->p_log, OSM_LOG_ERROR,
+ "ERR AD02: no switch info for node lid %u -"
+ " clearing cache\n", lid_ho);
+ osm_ucast_cache_invalidate(p_cache);
+ goto Exit;
+ }
+
+ /* unlink (add to cache) all the ports of this switch */
+ max_ports = osm_node_get_num_physp(p_node);
+ for (port_num = 1; port_num < max_ports; port_num++) {
+
+ p_physp = osm_node_get_physp_ptr(p_node, port_num);
+ if (!p_physp || !p_physp->p_node ||
+ !p_physp->p_remote_physp ||
+ !p_physp->p_remote_physp->p_node)
+ continue;
+
+ osm_ucast_cache_add_link(p_cache, p_node, port_num,
+
p_physp->p_remote_physp->p_node,
+
p_physp->p_remote_physp->port_num);
+ }
+
+ /*
+ * All the ports have been dropped (cached).
+ * If one of the ports was connected to CA/RTR,
+ * then the cached switch would be marked as leaf.
+ * If it isn't, then the dropped switch isn't a leaf,
+ * and cache can't handle it.
+ */
+
+ p_cache_sw = __cache_get_sw(p_cache, lid_ho);
+ CL_ASSERT(p_cache_sw);
+
+ if (!__cache_sw_is_leaf(p_cache_sw)) {
+ OSM_LOG(p_cache->p_ucast_mgr->p_log, OSM_LOG_INFO,
+ "Dropped non-leaf switch (lid %u) - "
+ "cache is invalid\n", lid_ho);
+ osm_ucast_cache_invalidate(p_cache);
+ goto Exit;
+ }
+
+ p_cache_sw->dropped = TRUE;
+
+ if (!p_node->sw->num_hops || !p_node->sw->hops) {
+ OSM_LOG(p_cache->p_ucast_mgr->p_log, OSM_LOG_INFO,
+ "No LID matrices for switch lid %u - "
+ "cache is invalid\n", lid_ho);
+ osm_ucast_cache_invalidate(p_cache);
+ goto Exit;
+ }
+
+ /* lid matrices */
+
+ p_cache_sw->num_hops = p_node->sw->num_hops;
+ p_node->sw->num_hops = 0;
+ p_cache_sw->hops = p_node->sw->hops;
+ p_node->sw->hops = NULL;
+
+ /* linear forwarding table */
+
+ p_cache_sw->lft = p_node->sw->lft_buf;
+ p_node->sw->lft_buf = NULL;
+ p_cache_sw->max_lid_ho = p_node->sw->max_lid_ho;
+ }
+ else {
+ /* dropping CA/RTR: add to cache all the ports of this switch */
+ max_ports = osm_node_get_num_physp(p_node);
+ for (port_num = 0; port_num < max_ports; port_num++) {
+
+ p_physp = osm_node_get_physp_ptr(p_node, port_num);
+ if (!p_physp || !p_physp->p_node ||
+ !p_physp->p_remote_physp ||
+ !p_physp->p_remote_physp->p_node)
+ continue;
+
+ p_remote_node = p_physp->p_remote_physp->p_node;
+ if (osm_node_get_type(p_remote_node) !=
+ IB_NODE_TYPE_SWITCH) {
+ /* CA/RTR to CA/RTR connection */
+ OSM_LOG(p_cache->p_ucast_mgr->p_log,
OSM_LOG_INFO,
+ "Dropping CA/RTR to CA/RTR connection -
"
+ "cache is invalid\n");
+ osm_ucast_cache_invalidate(p_cache);
+ goto Exit;
+ }
+
+ osm_ucast_cache_add_link(p_cache, p_remote_node,
+
p_physp->p_remote_physp->port_num,
+ p_node, port_num);
+ }
+ }
+Exit:
+ OSM_LOG_EXIT(p_cache->p_ucast_mgr->p_log);
+} /* osm_ucast_cache_add_node() */
+
+/**********************************************************************
+ **********************************************************************/
+
+void
+osm_ucast_cache_apply(osm_ucast_cache_t * p_cache)
+{
+ osm_subn_t * p_subn = p_cache->p_ucast_mgr->p_subn;
+ osm_switch_t *p_sw;
+
+ OSM_LOG_ENTER(p_cache->p_ucast_mgr->p_log);
+ OSM_LOG(p_cache->p_ucast_mgr->p_log, OSM_LOG_INFO,
+ "Applying unicast cache\n");
+ CL_ASSERT(p_cache && p_cache->p_ucast_mgr && p_cache->valid);
+
+ for (p_sw = (osm_switch_t *) cl_qmap_head(&p_subn->sw_guid_tbl);
+ p_sw != (osm_switch_t *) cl_qmap_end(&p_subn->sw_guid_tbl);
+ p_sw = (osm_switch_t *) cl_qmap_next(&p_sw->map_item))
+ osm_ucast_mgr_set_fwd_table(p_cache->p_ucast_mgr, p_sw);
+
+ OSM_LOG_EXIT(p_cache->p_ucast_mgr->p_log);
+}
+
+/**********************************************************************
+ **********************************************************************/
--
1.5.1.4
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