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/*
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 "globals.h"
#include "run.h"
#include "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 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;
}
static int
glusterd_nfssvc_create_volfile ()
{
char filepath[PATH_MAX] = {0,};
glusterd_conf_t *conf = THIS->private;
glusterd_svc_build_volfile_path (conf->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_svc_init (svc, "nfs");
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;
/* not an error, or a (very) soft error at best */
if (sys_access (XLATORDIR "/nfs/server.so", R_OK) != 0) {
gf_msg (THIS->name, GF_LOG_INFO, 0,
GD_MSG_GNFS_XLATOR_NOT_INSTALLED,
"nfs/server.so xlator is not installed");
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 (this->name, this, out);
priv = this->private;
GF_VALIDATE_OR_GOTO (this->name, priv, out);
/* not an error, or a (very) soft error at best */
if (sys_access (XLATORDIR "/nfs/server.so", R_OK) != 0) {
gf_msg (THIS->name, GF_LOG_INFO, 0,
GD_MSG_GNFS_XLATOR_NOT_INSTALLED,
"nfs/server.so xlator is not installed");
ret = 0;
goto 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->name, 0, "Returning %d", ret);
return ret;
}
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