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, 158 insertions, 0 deletions

diff --git a/xlators/mgmt/glusterd/src/glusterd-quotad-svc.c b/xlators/mgmt/glusterd/src/glusterd-quotad-svc.c
new file mode 100644
index 00000000000..bd77a72c5ab
--- /dev/null
+++ b/xlators/mgmt/glusterd/src/glusterd-quotad-svc.c
@@ -0,0 +1,158 @@
+/*
+   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-quotad-svc.h"
+
+char *quotad_svc_name = "quotad";
+
+int glusterd_quotadsvc_init (glusterd_svc_t *svc)
+{
+        int              ret                = -1;
+        char             volfile[PATH_MAX]  = {0,};
+        glusterd_conf_t *conf               = THIS->private;
+
+        ret = glusterd_svc_init (svc, quotad_svc_name,
+                                 glusterd_quotadsvc_manager,
+                                 glusterd_quotadsvc_start,
+                                 glusterd_svc_stop);
+        if (ret)
+                goto out;
+
+        /* glusterd_svc_build_volfile_path () doesn't put correct quotad volfile
+         * path in proc object at service initialization. Re-initialize
+         * the correct path
+         */
+        glusterd_quotadsvc_build_volfile_path (quotad_svc_name, conf->workdir,
+                                               volfile, sizeof (volfile));
+        snprintf (svc->proc.volfile, sizeof (svc->proc.volfile), "%s", volfile);
+out:
+        return ret;
+}
+
+static int
+glusterd_quotadsvc_create_volfile ()
+{
+        char             filepath[PATH_MAX] = {0,};
+        glusterd_conf_t *conf               = THIS->private;
+
+        glusterd_quotadsvc_build_volfile_path (quotad_svc_name, conf->workdir,
+                                               filepath, sizeof (filepath));
+        return glusterd_create_global_volfile (build_quotad_graph,
+                                               filepath, NULL);
+}
+
+int
+glusterd_quotadsvc_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_volumes_with_quota_stopped ()) {
+                if (!(volinfo && !glusterd_is_volume_quota_enabled (volinfo))) {
+                        ret = svc->stop (svc, SIGTERM);
+                }
+        } else {
+                if (!(volinfo && !glusterd_is_volume_quota_enabled (volinfo))) {
+                        ret = glusterd_quotadsvc_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_quotadsvc_start (glusterd_svc_t *svc, int flags)
+{
+        int              i         = 0;
+        int              ret       = -1;
+        dict_t          *cmdline   = NULL;
+        char             key[16]   = {0};
+        char            *options[] = {
+                                      "*replicate*.entry-self-heal=off",
+                                      "--xlator-option",
+                                      "*replicate*.metadata-self-heal=off",
+                                      "--xlator-option",
+                                      "*replicate*.data-self-heal=off",
+                                      "--xlator-option",
+                                      NULL
+                                      };
+
+        cmdline = dict_new ();
+        if (!cmdline)
+                goto out;
+
+        for (i = 0; options[i]; i++) {
+                memset (key, 0, sizeof (key));
+                snprintf (key, sizeof (key), "arg%d", i);
+                ret = dict_set_str (cmdline, key, options[i]);
+                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_quotadsvc_reconfigure ()
+{
+        return glusterd_svc_reconfigure (glusterd_quotadsvc_create_volfile);
+}
+
+void
+glusterd_quotadsvc_build_volfile_path (char *server, char *workdir,
+                                       char *volfile, size_t len)
+{
+        char  dir[PATH_MAX] = {0,};
+
+        GF_ASSERT (len == PATH_MAX);
+
+        glusterd_svc_build_svcdir (server, workdir, dir, sizeof (dir));
+        snprintf (volfile, len, "%s/%s.vol", dir, server);
+}