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-rw-r--r--libglusterfs/src/scheduler.c80
1 files changed, 80 insertions, 0 deletions
diff --git a/libglusterfs/src/scheduler.c b/libglusterfs/src/scheduler.c
new file mode 100644
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+++ b/libglusterfs/src/scheduler.c
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+/*
+ Copyright (c) 2006, 2007, 2008 Z RESEARCH, Inc. <http://www.zresearch.com>
+ This file is part of GlusterFS.
+
+ GlusterFS is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 3 of the License,
+ or (at your option) any later version.
+
+ GlusterFS is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see
+ <http://www.gnu.org/licenses/>.
+*/
+
+#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;
+
+ if (name == NULL) {
+ gf_log ("scheduler", GF_LOG_ERROR,
+ "'name' not specified, EINVAL");
+ return NULL;
+ }
+
+ asprintf (&sched_file, "%s/%s.so", SCHEDULERDIR, name);
+
+ 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 ());
+ return NULL;
+ }
+
+ tmp_sched = dlsym (handle, "sched");
+ if (!tmp_sched) {
+ gf_log ("scheduler", GF_LOG_ERROR,
+ "dlsym(sched) on %s", dlerror ());
+ return NULL;
+ }
+
+ vol_opt = CALLOC (1, sizeof (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");
+ return NULL;
+ }
+ }
+
+ return tmp_sched;
+}