106 строки
3.6 KiB
C
106 строки
3.6 KiB
C
/*
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* Copyright (c) 2014 Intel, Inc. All rights reserved.
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* Copyright (c) 2014 Cisco Systems, Inc. All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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#include "opal_config.h"
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#include "opal/constants.h"
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#include <string.h>
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#include "opal/mca/mca.h"
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#include "opal/mca/base/base.h"
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#include "opal/util/output.h"
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#include "opal/mca/sec/base/base.h"
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static bool selected = false;
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/*
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* Function for selecting one component from all those that are
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* available.
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*/
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int opal_sec_base_select(void)
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{
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mca_base_component_list_item_t *cli = NULL;
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mca_base_component_t *component = NULL;
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mca_base_module_t *module = NULL;
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opal_sec_base_module_t *smodule, *nmodule = NULL;
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int rc, priority, pri = -1;
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if (selected) {
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/* ensure we don't do this twice */
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return OPAL_SUCCESS;
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}
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selected = true;
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/* Query all available components and ask if they have a module */
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OPAL_LIST_FOREACH(cli, &opal_sec_base_framework.framework_components, mca_base_component_list_item_t) {
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component = (mca_base_component_t *) cli->cli_component;
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opal_output_verbose(5, opal_sec_base_framework.framework_output,
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"mca:sec:select: checking available component %s", component->mca_component_name);
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/* If there's no query function, skip it */
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if (NULL == component->mca_query_component) {
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opal_output_verbose(5, opal_sec_base_framework.framework_output,
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"mca:sec:select: Skipping component [%s]. It does not implement a query function",
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component->mca_component_name );
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continue;
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}
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/* Query the component */
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opal_output_verbose(5, opal_sec_base_framework.framework_output,
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"mca:sec:select: Querying component [%s]",
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component->mca_component_name);
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rc = component->mca_query_component(&module, &priority);
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/* If no module was returned, then skip component */
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if (OPAL_SUCCESS != rc || NULL == module) {
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opal_output_verbose(5, opal_sec_base_framework.framework_output,
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"mca:sec:select: Skipping component [%s]. Query failed to return a module",
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component->mca_component_name );
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continue;
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}
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smodule = (opal_sec_base_module_t*)module;
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/* modules are required to have an init function */
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if (NULL == smodule->init) {
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/* report the error */
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opal_output_verbose(5, opal_sec_base_framework.framework_output,
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"mca:sec:select: Skipping component [%s]. It does not implement an init function",
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component->mca_component_name);
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continue;
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}
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/* if we got a module, let it try to initialize */
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if (OPAL_SUCCESS != (rc = smodule->init())) {
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/* couldn't init - ignore it */
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opal_output_verbose(5, opal_sec_base_framework.framework_output,
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"mca:sec:select: Skipping component [%s]. Init returned %d",
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component->mca_component_name, rc);
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continue;
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}
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/* see if this is the one to keep - only retain the highest priority */
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if (pri < priority) {
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nmodule = smodule;
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pri = priority;
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}
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}
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if (NULL == nmodule) {
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/* no module available - error out */
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return OPAL_ERROR;
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}
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opal_sec = *nmodule;
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return OPAL_SUCCESS;;
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}
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