/*
Copyright (c) 2014 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 <glusterfs/globals.h>
#include <glusterfs/run.h>
#include <glusterfs/syscall.h>
#include "glusterd.h"
#include "glusterd-utils.h"
#include "glusterd-volgen.h"
#include "glusterd-nfs-svc.h"
#include "glusterd-messages.h"
#include "glusterd-svc-helper.h"
static char *nfs_svc_name = "nfs";
static gf_boolean_t
glusterd_nfssvc_need_start()
{
glusterd_conf_t *priv = NULL;
gf_boolean_t start = _gf_false;
glusterd_volinfo_t *volinfo = NULL;
priv = THIS->private;
cds_list_for_each_entry(volinfo, &priv->volumes, vol_list)
{
if (!glusterd_is_volume_started(volinfo))
continue;
if (dict_get_str_boolean(volinfo->dict, NFS_DISABLE_MAP_KEY, 1))
continue;
start = _gf_true;
break;
}
return start;
}
int
glusterd_nfssvc_init(glusterd_svc_t *svc)
{
return glusterd_svc_init(svc, nfs_svc_name);
}
static int
glusterd_nfssvc_create_volfile()
{
char filepath[PATH_MAX] = {
0,
};
glusterd_conf_t *conf = THIS->private;
glusterd_svc_build_volfile_path(nfs_svc_name, conf->workdir, filepath,
sizeof(filepath));
return glusterd_create_global_volfile(build_nfs_graph, filepath, NULL);
}
static int
glusterd_nfssvc_manager(glusterd_svc_t *svc, void *data, int flags)
{
int ret = -1;
if (!svc->inited) {
ret = glusterd_nfssvc_init(svc);
if (ret) {
gf_msg(THIS->name, GF_LOG_ERROR, 0, GD_MSG_FAILED_INIT_NFSSVC,
"Failed to init nfs service");
goto out;
} else {
svc->inited = _gf_true;
gf_msg_debug(THIS->name, 0, "nfs service initialized");
}
}
ret = svc->stop(svc, SIGKILL);
if (ret)
goto out;
ret = glusterd_nfssvc_create_volfile();
if (ret)
goto out;
if (glusterd_nfssvc_need_start()) {
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;
}
static int
glusterd_nfssvc_start(glusterd_svc_t *svc, int flags)
{
return glusterd_svc_start(svc, flags, NULL);
}
static int
glusterd_nfssvc_stop(glusterd_svc_t *svc, int sig)
{
int ret = -1;
gf_boolean_t deregister = _gf_false;
if (glusterd_proc_is_running(&(svc->proc)))
deregister = _gf_true;
ret = glusterd_svc_stop(svc, sig);
if (ret)
goto out;
if (deregister)
glusterd_nfs_pmap_deregister();
out:
gf_msg_debug(THIS->name, 0, "Returning %d", ret);
return ret;
}
void
glusterd_nfssvc_build(glusterd_svc_t *svc)
{
svc->manager = glusterd_nfssvc_manager;
svc->start = glusterd_nfssvc_start;
svc->stop = glusterd_nfssvc_stop;
}
int
glusterd_nfssvc_reconfigure()
{
int ret = -1;
xlator_t *this = NULL;
glusterd_conf_t *priv = NULL;
gf_boolean_t identical = _gf_false;
gf_boolean_t vol_started = _gf_false;
glusterd_volinfo_t *volinfo = NULL;
this = THIS;
GF_VALIDATE_OR_GOTO("glusterd", this, out);
priv = this->private;
GF_VALIDATE_OR_GOTO(this->name, priv, out);
cds_list_for_each_entry(volinfo, &priv->volumes, vol_list)
{
if (GLUSTERD_STATUS_STARTED == volinfo->status) {
vol_started = _gf_true;
break;
}
}
if (!vol_started) {
ret = 0;
goto out;
}
/*
* 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->nfs_svc.name,
build_nfs_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->nfs_svc.name,
build_nfs_graph, &identical);
if (ret)
goto out;
/* Topology is not changed, but just the options. But write the
* options to NFS volfile, so that NFS will be reconfigured.
*/
if (identical) {
ret = glusterd_nfssvc_create_volfile();
if (ret == 0) { /* Only if above PASSES */
ret = glusterd_fetchspec_notify(THIS);
}
goto out;
}
/*
* NFS volfile's topology has been changed. NFS server needs
* to be RESTARTED to ACT on the changed volfile.
*/
ret = priv->nfs_svc.manager(&(priv->nfs_svc), NULL, PROC_START_NO_WAIT);
out:
gf_msg_debug(this ? this->name : "glusterd", 0, "Returning %d", ret);
return ret;
}