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Diffstat (limited to 'xlators/mgmt/glusterd/src/glusterd-nfs-svc.c')
-rw-r--r--xlators/mgmt/glusterd/src/glusterd-nfs-svc.c256
1 files changed, 256 insertions, 0 deletions
diff --git a/xlators/mgmt/glusterd/src/glusterd-nfs-svc.c b/xlators/mgmt/glusterd/src/glusterd-nfs-svc.c
new file mode 100644
index 00000000000..91cbae7bda6
--- /dev/null
+++ b/xlators/mgmt/glusterd/src/glusterd-nfs-svc.c
@@ -0,0 +1,256 @@
+/*
+ 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";
+
+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;
+
+ if (glusterd_are_all_volumes_stopped ()) {
+ ret = svc->stop (svc, SIGKILL);
+ } else {
+ ret = glusterd_nfssvc_create_volfile ();
+ if (ret)
+ goto out;
+
+ ret = svc->stop (svc, SIGKILL);
+ 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_nfssvc_start (glusterd_svc_t *svc, int flags)
+{
+ return glusterd_svc_start (svc, flags, NULL);
+}
+
+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;
+
+}