rpc: server to client callback mechanism

Signed-off-by: Amar Tumballi <amar@gluster.com>
Signed-off-by: Vijay Bellur <vijay@dev.gluster.com>

3 files changed, 67 insertions, 1 deletions

diff --git a/xlators/protocol/client/src/Makefile.am b/xlators/protocol/client/src/Makefile.am
index 159faf268a7..007810e9901 100644
--- a/xlators/protocol/client/src/Makefile.am
+++ b/xlators/protocol/client/src/Makefile.am
@@ -8,7 +8,8 @@ client_la_LIBADD = $(top_builddir)/libglusterfs/src/libglusterfs.la \
 	$(top_builddir)/rpc/rpc-lib/src/libgfrpc.la \
 	$(top_builddir)/rpc/xdr/src/libgfxdr.la
 
-client_la_SOURCES = client.c client-helpers.c client3_1-fops.c client-handshake.c
+client_la_SOURCES = client.c client-helpers.c client3_1-fops.c  \
+	client-handshake.c client-callback.c
 noinst_HEADERS = client.h client-mem-types.h
 
 AM_CFLAGS = -fPIC -D_FILE_OFFSET_BITS=64 -D_GNU_SOURCE -Wall -D$(GF_HOST_OS) \
diff --git a/xlators/protocol/client/src/client-callback.c b/xlators/protocol/client/src/client-callback.c
new file mode 100644
index 00000000000..51bd3375845
--- /dev/null
+++ b/xlators/protocol/client/src/client-callback.c
@@ -0,0 +1,60 @@
+/*
+  Copyright (c) 2010 Gluster, Inc. <http://www.gluster.com>
+  This file is part of GlusterFS.
+
+  GlusterFS is free software; you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published
+  by the Free Software Foundation; either version 3 of the License,
+  or (at your option) any later version.
+
+  GlusterFS is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see
+  <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include "client.h"
+#include "rpc-clnt.h"
+
+int
+client_cbk_null (void *data)
+{
+        return 0;
+}
+
+int
+client_cbk_fetchspec (void *data)
+{
+        gf_log ("", 1, "here i am");
+        return 0;
+}
+
+int
+client_cbk_ino_flush (void *data)
+{
+        return 0;
+}
+
+rpcclnt_cb_actor_t gluster_cbk_actors[] = {
+        [GF_CBK_NULL]      = {"NULL",      GF_CBK_NULL,      client_cbk_null },
+        [GF_CBK_FETCHSPEC] = {"FETCHSPEC", GF_CBK_FETCHSPEC, client_cbk_fetchspec },
+        [GF_CBK_INO_FLUSH] = {"INO_FLUSH", GF_CBK_INO_FLUSH, client_cbk_ino_flush },
+};
+
+
+struct rpcclnt_cb_program gluster_cbk_prog = {
+        .progname  = "GlusterFS Callback",
+        .prognum   = GLUSTER_CBK_PROGRAM,
+        .progver   = GLUSTER_CBK_VERSION,
+        .actors    = gluster_cbk_actors,
+        .numactors = GF_CBK_MAXVALUE,
+};
diff --git a/xlators/protocol/client/src/client.c b/xlators/protocol/client/src/client.c
index c840d96f54c..458ecfa8f88 100644
--- a/xlators/protocol/client/src/client.c
+++ b/xlators/protocol/client/src/client.c
@@ -34,6 +34,7 @@
 
 extern rpc_clnt_prog_t clnt_handshake_prog;
 extern rpc_clnt_prog_t clnt_dump_prog;
+extern struct rpcclnt_cb_program gluster_cbk_prog;
 
 int client_handshake (xlator_t *this, struct rpc_clnt *rpc);
 void client_start_ping (void *data);
@@ -1730,6 +1731,10 @@ client_init_rpc (xlator_t *this)
         conf->handshake = &clnt_handshake_prog;
         conf->dump      = &clnt_dump_prog;
 
+        ret = rpcclnt_cbk_program_register (conf->rpc, &gluster_cbk_prog);
+        if (ret)
+                goto out;
+
         ret = 0;
 
         gf_log (this->name, GF_LOG_DEBUG, "client init successful");