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/*
Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com>
This file is part of GlusterFS.
This file is licensed to you under your choice of the GNU Lesser
General Public License, version 3 or any later version (LGPLv3 or
later), or the GNU General Public License, version 2 (GPLv2), in all
cases as published by the Free Software Foundation.
*/
#ifndef _CONFIG_H
#define _CONFIG_H
#include "config.h"
#endif
#include <dlfcn.h>
#include <netdb.h>
#include "xlator.h"
#include "scheduler.h"
#include "list.h"
struct sched_ops *
get_scheduler (xlator_t *xl, const char *name)
{
struct sched_ops *tmp_sched = NULL;
volume_opt_list_t *vol_opt = NULL;
char *sched_file = NULL;
void *handle = NULL;
int ret = 0;
if (name == NULL) {
gf_log ("scheduler", GF_LOG_ERROR,
"'name' not specified, EINVAL");
return NULL;
}
ret = gf_asprintf (&sched_file, "%s/%s.so", SCHEDULERDIR, name);
if (-1 == ret) {
gf_log ("scheduler", GF_LOG_ERROR, "asprintf failed");
return NULL;
}
gf_log ("scheduler", GF_LOG_DEBUG,
"attempt to load file %s.so", name);
handle = dlopen (sched_file, RTLD_LAZY);
if (!handle) {
gf_log ("scheduler", GF_LOG_ERROR,
"dlopen(%s): %s", sched_file, dlerror ());
GF_FREE(sched_file);
return NULL;
}
tmp_sched = dlsym (handle, "sched");
if (!tmp_sched) {
gf_log ("scheduler", GF_LOG_ERROR,
"dlsym(sched) on %s", dlerror ());
GF_FREE(sched_file);
return NULL;
}
vol_opt = GF_CALLOC (1, sizeof (volume_opt_list_t),
gf_common_mt_volume_opt_list_t);
vol_opt->given_opt = dlsym (handle, "options");
if (vol_opt->given_opt == NULL) {
gf_log ("scheduler", GF_LOG_DEBUG,
"volume option validation not specified");
} else {
list_add_tail (&vol_opt->list, &xl->volume_options);
if (validate_xlator_volume_options (xl, vol_opt->given_opt)
== -1) {
gf_log ("scheduler", GF_LOG_ERROR,
"volume option validation failed");
GF_FREE(sched_file);
return NULL;
}
}
GF_FREE(sched_file);
GF_FREE (vol_opt);
return tmp_sched;
}
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