NFS-Ganesha: Volume set option for managing NFS-Ganesha exports.

A dummy translator has been introduced as a place
holder for functions related to managing NFS-Ganesha
exports. A volume set option is introduced to
manage volume level exports.

gluster vol set <volname> ganesha.enable ON/OFF

1. gluster volume set <volname> ganesha.enable ON

It creates the export config file with a unique export ID.
Sends a DBus signal to export this volume dynamically.

2. gluster vol set <volname> ganesha.enable OFF

Unexports the specific volume. Deletes the specfic
config file related to the volume.

This change also removes the handling of the older
keys "nfs-ganesha.enable" and "nfs-ganesha.host"

Change-Id: I8d4a0b542326a6a0c8e4711600b106274d666587
BUG: 1188184
Signed-off-by: Meghana Madhusudhan <mmadhusu@redhat.com>
Reviewed-on: http://review.gluster.org/9585
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Niels de Vos <ndevos@redhat.com>

4 files changed, 147 insertions, 0 deletions

diff --git a/xlators/features/ganesha/src/Makefile.am b/xlators/features/ganesha/src/Makefile.am
new file mode 100644
index 00000000000..d42b68f8440
--- /dev/null
+++ b/xlators/features/ganesha/src/Makefile.am
@@ -0,0 +1,18 @@
+xlator_LTLIBRARIES = ganesha.la
+
+xlatordir = $(libdir)/glusterfs/$(PACKAGE_VERSION)/xlator/features
+
+noinst_HEADERS = ganesha.h ganesha-mem-types.h
+
+ganesha_la_LDFLAGS = -module -avoid-version
+
+ganesha_la_SOURCES = ganesha.c
+
+AM_CPPFLAGS = $(GF_CPPFLAGS) -I$(top_srcdir)/libglusterfs/src \
+        -fPIC -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -D$(GF_HOST_OS)\
+        -DGANESHA_DIR=\"$(sysconfdir)/ganesha\" \
+        -DGYSNCD_PREFIX=\"$(libexecdir)/glusterfs\"
+
+AM_CFLAGS = -Wall $(GF_CFLAGS)
+
+CLEANFILES =
diff --git a/xlators/features/ganesha/src/ganesha-mem-types.h b/xlators/features/ganesha/src/ganesha-mem-types.h
new file mode 100644
index 00000000000..c4976c01afc
--- /dev/null
+++ b/xlators/features/ganesha/src/ganesha-mem-types.h
@@ -0,0 +1,21 @@
+/*
+   Copyright (c) 2015 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.
+*/
+#ifndef __GANESHA_MEM_TYPES_H__
+#define __GANESHA_MEM_TYPES_H__
+
+
+#include "mem-types.h"
+
+enum gf_ganesha_mem_types_ {
+     gf_ganesha_mt_priv_t = gf_common_mt_end + 1,
+     gf_ganesha_mt_end
+};
+
+#endif
diff --git a/xlators/features/ganesha/src/ganesha.c b/xlators/features/ganesha/src/ganesha.c
new file mode 100644
index 00000000000..f034fc00d46
--- /dev/null
+++ b/xlators/features/ganesha/src/ganesha.c
@@ -0,0 +1,85 @@
+/*
+   Copyright (c) 2015 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.
+*/
+
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include "ganesha.h"
+#include "ganesha-mem-types.h"
+
+
+
+int32_t
+init (xlator_t *this)
+{
+        int        ret         = -1;
+        ganesha_priv_t   *priv = NULL;
+
+        if (!this->children || this->children->next) {
+                gf_log (this->name, GF_LOG_ERROR,
+                        "Need subvolume == 1");
+                goto err;
+        }
+
+        if (!this->parents) {
+                gf_log (this->name, GF_LOG_WARNING,
+                        "Dangling volume. Check volfile");
+                goto err;
+        }
+
+        priv = GF_CALLOC (1, sizeof (*priv), gf_ganesha_mt_priv_t);
+        if (!priv)
+                goto err;
+
+        this->private = priv;
+        ret = 0;
+
+err:
+        return ret;
+}
+
+
+void
+fini (xlator_t *this)
+{
+        ganesha_priv_t *priv = this->private;
+
+        this->private = NULL;
+        if (priv)
+                GF_FREE (priv);
+
+        return;
+}
+
+struct xlator_fops fops = {
+};
+
+struct xlator_cbks cbks = {
+};
+
+struct volume_options options[] = {
+        {
+         .key = {"features.ganesha"},
+         .default_value = "disable",
+         .type =  GF_OPTION_TYPE_BOOL,
+         .description = "enable translator"
+
+        },
+        { .key  = {"ganesha.enable"},
+          .default_value = "off",
+          .type =  GF_OPTION_TYPE_BOOL,
+          .description = "export volume via NFS-Ganesha"
+        },
+        { .key  = {NULL}
+        },
+};
diff --git a/xlators/features/ganesha/src/ganesha.h b/xlators/features/ganesha/src/ganesha.h
new file mode 100644
index 00000000000..f30723da46d
--- /dev/null
+++ b/xlators/features/ganesha/src/ganesha.h
@@ -0,0 +1,23 @@
+/*
+   Copyright (c) 2015 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.
+*/
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include "xlator.h"
+#include "ganesha-mem-types.h"
+
+typedef struct {
+        char *host_name;
+} ganesha_priv_t;
+
+