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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 "glusterd.h"
#include "glusterd-utils.h"
#include "glusterd-volgen.h"
#include "glusterd-nfs-svc.h"
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", 0))
continue;
start = _gf_true;
break;
}
return start;
}
int
glusterd_nfssvc_init (glusterd_svc_t *svc)
{
return glusterd_svc_init (svc, nfs_svc_name,
glusterd_nfssvc_manager,
glusterd_nfssvc_start,
glusterd_nfssvc_stop);
}
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_check_volfile_identical (gf_boolean_t *identical)
{
char nfsvol[PATH_MAX] = {0,};
char tmpnfsvol[PATH_MAX] = {0,};
glusterd_conf_t *conf = NULL;
xlator_t *this = NULL;
int ret = -1;
int need_unlink = 0;
int tmp_fd = -1;
this = THIS;
GF_ASSERT (this);
GF_ASSERT (identical);
conf = this->private;
glusterd_svc_build_volfile_path (nfs_svc_name, conf->workdir,
nfsvol, sizeof (nfsvol));
snprintf (tmpnfsvol, sizeof (tmpnfsvol), "/tmp/gnfs-XXXXXX");
tmp_fd = mkstemp (tmpnfsvol);
if (tmp_fd < 0) {
gf_log (this->name, GF_LOG_WARNING, "Unable to create temp file"
" %s:(%s)", tmpnfsvol, strerror (errno));
goto out;
}
need_unlink = 1;
ret = glusterd_create_global_volfile (build_nfs_graph,
tmpnfsvol, NULL);
if (ret)
goto out;
ret = glusterd_check_files_identical (nfsvol, tmpnfsvol,
identical);
if (ret)
goto out;
out:
if (need_unlink)
unlink (tmpnfsvol);
if (tmp_fd >= 0)
close (tmp_fd);
return ret;
}
static int
glusterd_nfssvc_check_topology_identical (gf_boolean_t *identical)
{
char nfsvol[PATH_MAX] = {0,};
char tmpnfsvol[PATH_MAX] = {0,};
glusterd_conf_t *conf = NULL;
xlator_t *this = THIS;
int ret = -1;
int tmpclean = 0;
int tmpfd = -1;
if ((!identical) || (!this) || (!this->private))
goto out;
conf = (glusterd_conf_t *) this->private;
GF_ASSERT (conf);
/* Fetch the original NFS volfile */
glusterd_svc_build_volfile_path (conf->nfs_svc.name, conf->workdir,
nfsvol, sizeof (nfsvol));
/* Create the temporary NFS volfile */
snprintf (tmpnfsvol, sizeof (tmpnfsvol), "/tmp/gnfs-XXXXXX");
tmpfd = mkstemp (tmpnfsvol);
if (tmpfd < 0) {
gf_log (this->name, GF_LOG_WARNING, "Unable to create temp file"
" %s: (%s)", tmpnfsvol, strerror (errno));
goto out;
}
tmpclean = 1; /* SET the flag to unlink() tmpfile */
ret = glusterd_create_global_volfile (build_nfs_graph,
tmpnfsvol, NULL);
if (ret)
goto out;
/* Compare the topology of volfiles */
ret = glusterd_check_topology_identical (nfsvol, tmpnfsvol,
identical);
out:
if (tmpfd >= 0)
close (tmpfd);
if (tmpclean)
unlink (tmpnfsvol);
return ret;
}
int
glusterd_nfssvc_manager (glusterd_svc_t *svc, void *data, int flags)
{
int ret = -1;
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:
gf_log (THIS->name, GF_LOG_DEBUG, "Returning %d", ret);
return ret;
}
int
glusterd_nfssvc_start (glusterd_svc_t *svc, int flags)
{
return glusterd_svc_start (svc, flags, NULL);
return 0;
}
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_log (THIS->name, GF_LOG_DEBUG, "Returning %d", ret);
return ret;
}
int
glusterd_nfssvc_reconfigure ()
{
int ret = -1;
xlator_t *this = NULL;
glusterd_conf_t *priv = NULL;
gf_boolean_t identical = _gf_false;
this = THIS;
GF_ASSERT (this);
priv = this->private;
GF_ASSERT (priv);
/*
* 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_nfssvc_check_volfile_identical (&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_nfssvc_check_topology_identical (&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:
return ret;
}
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