glusterd: nfs,shd,quotad,snapd daemons refactoring

This patch ports nfs, shd, quotad & snapd with the approach suggested in
http://www.gluster.org/pipermail/gluster-devel/2014-December/043180.html

Change-Id: I4ea5b38793f87fc85cc9d2cf873727351dedffd2
BUG: 1191486
Signed-off-by: Atin Mukherjee <amukherj@redhat.com>
Signed-off-by:  Krishnan Parthasarathi <kparthas@redhat.com>
Reviewed-on: http://review.gluster.org/9428
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Nekkunti <anekkunt@redhat.com>

1 files changed, 167 insertions, 0 deletions

diff --git a/xlators/mgmt/glusterd/src/glusterd-shd-svc.c b/xlators/mgmt/glusterd/src/glusterd-shd-svc.c
new file mode 100644
index 00000000000..dd85d1e3638
--- /dev/null
+++ b/xlators/mgmt/glusterd/src/glusterd-shd-svc.c
@@ -0,0 +1,167 @@
+/*
+   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-svc-mgmt.h"
+#include "glusterd-shd-svc.h"
+
+char *shd_svc_name = "glustershd";
+
+int
+glusterd_shdsvc_init (glusterd_svc_t *svc)
+{
+        return glusterd_svc_init (svc, shd_svc_name,
+                                  glusterd_shdsvc_manager,
+                                  glusterd_shdsvc_start,
+                                  glusterd_svc_stop);
+}
+
+static int
+glusterd_shdsvc_create_volfile ()
+{
+        char            filepath[PATH_MAX] = {0,};
+        int             ret = -1;
+        glusterd_conf_t *conf = THIS->private;
+        dict_t          *mod_dict = NULL;
+
+        mod_dict = dict_new ();
+        if (!mod_dict)
+                goto out;
+
+        ret = dict_set_uint32 (mod_dict, "cluster.background-self-heal-count",
+                               0);
+        if (ret)
+                goto out;
+
+        ret = dict_set_str (mod_dict, "cluster.data-self-heal", "on");
+        if (ret)
+                goto out;
+
+        ret = dict_set_str (mod_dict, "cluster.metadata-self-heal", "on");
+        if (ret)
+                goto out;
+
+        ret = dict_set_str (mod_dict, "cluster.entry-self-heal", "on");
+        if (ret)
+                goto out;
+
+        glusterd_svc_build_volfile_path (shd_svc_name, conf->workdir,
+                                         filepath, sizeof (filepath));
+        ret = glusterd_create_global_volfile (build_shd_graph, filepath,
+                                              mod_dict);
+        if (ret) {
+                gf_log (THIS->name, GF_LOG_ERROR, "Failed to create volfile");
+                goto out;
+        }
+
+out:
+        if (mod_dict)
+                dict_unref (mod_dict);
+        gf_log (THIS->name, GF_LOG_DEBUG, "Returning %d", ret);
+
+        return ret;
+}
+
+int
+glusterd_shdsvc_manager (glusterd_svc_t *svc, void *data, int flags)
+{
+        int                 ret     = 0;
+        glusterd_volinfo_t *volinfo = NULL;
+
+        volinfo = data;
+
+        /* If all the volumes are stopped or all shd compatible volumes
+         * are stopped then stop the service if:
+         * - volinfo is NULL or
+         * - volinfo is present and volume is shd compatible
+         * Otherwise create volfile and restart service if:
+         * - volinfo is NULL or
+         * - volinfo is present and volume is shd compatible
+         */
+        if (glusterd_are_all_volumes_stopped () ||
+            glusterd_all_shd_compatible_volumes_stopped ()) {
+                if (!(volinfo &&
+                      !glusterd_is_shd_compatible_volume (volinfo))) {
+                        ret = svc->stop (svc, SIGTERM);
+                }
+        } else {
+                if (!(volinfo &&
+                      !glusterd_is_shd_compatible_volume (volinfo))) {
+                        ret = glusterd_shdsvc_create_volfile ();
+                        if (ret)
+                                goto out;
+
+                        ret = svc->stop (svc, SIGTERM);
+                        if (ret)
+                                goto out;
+
+                        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_shdsvc_start (glusterd_svc_t *svc, int flags)
+{
+        int              ret                            = -1;
+        char             glusterd_uuid_option[PATH_MAX] = {0};
+        dict_t          *cmdline                        = NULL;
+
+        cmdline = dict_new ();
+        if (!cmdline)
+                goto out;
+
+        ret = snprintf (glusterd_uuid_option, sizeof (glusterd_uuid_option),
+                        "*replicate*.node-uuid=%s", uuid_utoa (MY_UUID));
+        if (ret < 0)
+                goto out;
+
+        /* Pass cmdline arguments as key-value pair. The key is merely
+         * a carrier and is not used. Since dictionary follows LIFO the value
+         * should be put in reverse order*/
+        ret = dict_set_str (cmdline, "arg2", glusterd_uuid_option);
+        if (ret)
+                goto out;
+
+        ret = dict_set_str (cmdline, "arg1", "--xlator-option");
+        if (ret)
+                goto out;
+
+        ret = glusterd_svc_start (svc, flags, cmdline);
+
+out:
+        if (cmdline)
+                dict_unref (cmdline);
+
+        gf_log (THIS->name, GF_LOG_DEBUG, "Returning %d", ret);
+
+        return ret;
+}
+
+
+int
+glusterd_shdsvc_reconfigure ()
+{
+        return glusterd_svc_reconfigure (glusterd_shdsvc_create_volfile);
+}