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/*
Copyright (c) 2006-2012 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.
*/
#include "globals.h"
#include "run.h"
#include "glusterd.h"
#include "glusterd-utils.h"
#include "glusterd-volgen.h"
#include "glusterd-bitd-svc.h"
#include "glusterd-svc-helper.h"
void
glusterd_bitdsvc_build(glusterd_svc_t *svc)
{
svc->manager = glusterd_bitdsvc_manager;
svc->start = glusterd_bitdsvc_start;
svc->stop = glusterd_bitdsvc_stop;
}
int
glusterd_bitdsvc_init(glusterd_svc_t *svc)
{
return glusterd_svc_init(svc, bitd_svc_name);
}
static int
glusterd_bitdsvc_create_volfile()
{
char filepath[PATH_MAX] = {
0,
};
int ret = -1;
glusterd_conf_t *conf = NULL;
xlator_t *this = NULL;
this = THIS;
conf = this->private;
GF_ASSERT(conf);
glusterd_svc_build_volfile_path(bitd_svc_name, conf->workdir, filepath,
sizeof(filepath));
ret = glusterd_create_global_volfile(build_bitd_graph, filepath, NULL);
if (ret) {
gf_msg(this->name, GF_LOG_ERROR, 0, GD_MSG_VOLFILE_CREATE_FAIL,
"Failed to create volfile");
goto out;
}
out:
gf_msg_debug(this->name, 0, "Returning %d", ret);
return ret;
}
int
glusterd_bitdsvc_manager(glusterd_svc_t *svc, void *data, int flags)
{
int ret = 0;
xlator_t *this = NULL;
this = THIS;
GF_ASSERT(this);
if (!svc->inited) {
ret = glusterd_bitdsvc_init(svc);
if (ret) {
gf_msg(this->name, GF_LOG_ERROR, 0, GD_MSG_BITD_INIT_FAIL,
"Failed to init "
"bitd service");
goto out;
} else {
svc->inited = _gf_true;
gf_msg_debug(this->name, 0,
"BitD service "
"initialized");
}
}
if (glusterd_should_i_stop_bitd()) {
ret = svc->stop(svc, SIGTERM);
} else {
ret = glusterd_bitdsvc_create_volfile();
if (ret)
goto out;
ret = svc->stop(svc, SIGKILL);
if (ret)
goto out;
ret = svc->start(svc, flags);
if (ret)
goto out;
ret = glusterd_conn_connect(&(svc->conn));
if (ret)
goto out;
}
out:
if (ret)
gf_event(EVENT_SVC_MANAGER_FAILED, "svc_name=%s", svc->name);
gf_msg_debug(THIS->name, 0, "Returning %d", ret);
return ret;
}
int
glusterd_bitdsvc_start(glusterd_svc_t *svc, int flags)
{
int ret = -1;
dict_t *cmdict = NULL;
cmdict = dict_new();
if (!cmdict)
goto error_return;
ret = dict_set_str(cmdict, "cmdarg0", "--global-timer-wheel");
if (ret)
goto dealloc_dict;
ret = glusterd_svc_start(svc, flags, cmdict);
dealloc_dict:
dict_unref(cmdict);
error_return:
return ret;
}
int
glusterd_bitdsvc_stop(glusterd_svc_t *svc, int sig)
{
return glusterd_svc_stop(svc, sig);
}
int
glusterd_bitdsvc_reconfigure()
{
int ret = -1;
xlator_t *this = NULL;
glusterd_conf_t *priv = NULL;
gf_boolean_t identical = _gf_false;
this = THIS;
GF_VALIDATE_OR_GOTO(this->name, this, out);
priv = this->private;
GF_VALIDATE_OR_GOTO(this->name, priv, out);
if (glusterd_should_i_stop_bitd())
goto manager;
/*
* Check both OLD and NEW volfiles, if they are SAME by size
* and cksum i.e. "character-by-character". If YES, then
* NOTHING has been changed, just return.
*/
ret = glusterd_svc_check_volfile_identical(priv->bitd_svc.name,
build_bitd_graph, &identical);
if (ret)
goto out;
if (identical) {
ret = 0;
goto out;
}
/*
* They are not identical. Find out if the topology is changed
* OR just the volume options. If just the options which got
* changed, then inform the xlator to reconfigure the options.
*/
identical = _gf_false; /* RESET the FLAG */
ret = glusterd_svc_check_topology_identical(priv->bitd_svc.name,
build_bitd_graph, &identical);
if (ret)
goto out; /*not able to compare due to some corruption */
/* Topology is not changed, but just the options. But write the
* options to bitd volfile, so that bitd will be reconfigured.
*/
if (identical) {
ret = glusterd_bitdsvc_create_volfile();
if (ret == 0) { /* Only if above PASSES */
ret = glusterd_fetchspec_notify(THIS);
}
goto out;
}
manager:
/*
* bitd volfile's topology has been changed. bitd server needs
* to be RESTARTED to ACT on the changed volfile.
*/
ret = priv->bitd_svc.manager(&(priv->bitd_svc), NULL, PROC_START_NO_WAIT);
out:
gf_msg_debug(this->name, 0, "Returning %d", ret);
return ret;
}
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