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, 135 insertions, 0 deletions

diff --git a/xlators/mgmt/glusterd/src/glusterd-conn-mgmt.c b/xlators/mgmt/glusterd/src/glusterd-conn-mgmt.c
new file mode 100644
index 00000000000..662aba6e724
--- /dev/null
+++ b/xlators/mgmt/glusterd/src/glusterd-conn-mgmt.c
@@ -0,0 +1,135 @@
+/*
+   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 "xlator.h"
+#include "rpc-clnt.h"
+#include "glusterd.h"
+#include "glusterd-conn-mgmt.h"
+#include "glusterd-conn-helper.h"
+#include "glusterd-utils.h"
+
+int
+glusterd_conn_init (glusterd_conn_t *conn, char *sockpath,
+                    int frame_timeout, glusterd_conn_notify_t notify)
+{
+        int                  ret      = -1;
+        dict_t              *options  = NULL;
+        struct rpc_clnt     *rpc      = NULL;
+        xlator_t            *this     = THIS;
+        glusterd_svc_t      *svc      = NULL;
+
+        if (!this)
+                goto out;
+
+        svc = glusterd_conn_get_svc_object (conn);
+        if (!svc) {
+                gf_log (this->name, GF_LOG_ERROR, "Failed to get the service");
+                goto out;
+        }
+
+        ret = rpc_transport_unix_options_build (&options, sockpath,
+                                                frame_timeout);
+        if (ret)
+                goto out;
+
+        ret = dict_set_str (options, "transport.socket.ignore-enoent", "on");
+        if (ret)
+                goto out;
+
+        /* @options is free'd by rpc_transport when destroyed */
+        rpc = rpc_clnt_new (options, this->ctx, (char *)svc->name, 16);
+        if (!rpc) {
+                ret = -1;
+                goto out;
+        }
+
+        ret = rpc_clnt_register_notify (rpc, glusterd_conn_common_notify,
+                                        conn);
+        if (ret)
+                goto out;
+
+        ret = snprintf (conn->sockpath, sizeof (conn->sockpath), "%s",
+                        sockpath);
+        if (ret < 0)
+                goto out;
+        else
+                ret = 0;
+
+        conn->frame_timeout = frame_timeout;
+        conn->rpc = rpc;
+        conn->notify = notify;
+out:
+        if (ret) {
+                if (rpc) {
+                        rpc_clnt_unref (rpc);
+                        rpc = NULL;
+                }
+        }
+        return ret;
+}
+
+int
+glusterd_conn_term (glusterd_conn_t *conn)
+{
+        rpc_clnt_disable (conn->rpc);
+        rpc_clnt_unref (conn->rpc);
+        return 0;
+}
+
+int
+glusterd_conn_connect (glusterd_conn_t *conn)
+{
+        return rpc_clnt_start (conn->rpc);
+}
+
+int
+glusterd_conn_disconnect (glusterd_conn_t *conn)
+{
+        rpc_clnt_disconnect (conn->rpc);
+
+        return 0;
+}
+
+
+int
+__glusterd_conn_common_notify (struct rpc_clnt *rpc, void *mydata,
+                               rpc_clnt_event_t event, void *data)
+{
+        glusterd_conn_t *conn = mydata;
+
+        /* Silently ignoring this error, exactly like the current
+         * implementation */
+        if (!conn)
+                return 0;
+
+        return conn->notify (conn, event);
+}
+
+int
+glusterd_conn_common_notify (struct rpc_clnt *rpc, void *mydata,
+                             rpc_clnt_event_t event, void *data)
+{
+        return glusterd_big_locked_notify
+                                (rpc, mydata, event, data,
+                                 __glusterd_conn_common_notify);
+}
+
+int32_t
+glusterd_conn_build_socket_filepath (char *rundir, uuid_t uuid,
+                                     char *socketpath, int len)
+{
+        char sockfilepath[PATH_MAX] = {0,};
+
+        snprintf (sockfilepath, sizeof (sockfilepath), "%s/run-%s",
+                  rundir, uuid_utoa (uuid));
+
+        glusterd_set_socket_filepath (sockfilepath, socketpath, len);
+        return 0;
+}