libgfapi: To support set_volfile-server-transport type "unix"

This patch helps libgfapi to get the volfile using Unix domain socket.
run the attachment file in the bug to test.
The patch checks if the glfs_set_volfile_server transport is of type "unix",
If It is then uses rpc_transport_unix_options_build to get the volfile.

Change-Id: Ifd5d1e7c0d8cc9a906c3c3355b8977141e892a2f
BUG: 1279739
Signed-off-by: Mohamed Ashiq <mliyazud@redhat.com>
Signed-off-by: Humble Devassy Chirammal <hchiramm@redhat.com>
Reviewed-on: http://review.gluster.org/12563
Tested-by: NetBSD Build System <jenkins@build.gluster.org>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Niels de Vos <ndevos@redhat.com>
Reviewed-by: Poornima G <pgurusid@redhat.com>
Reviewed-by: Raghavendra Talur <rtalur@redhat.com>
Reviewed-by: Shyamsundar Ranganathan <srangana@redhat.com>

3 files changed, 25 insertions, 13 deletions

diff --git a/api/src/Makefile.am b/api/src/Makefile.am
index 527b12d0850..872868aab0c 100644
--- a/api/src/Makefile.am
+++ b/api/src/Makefile.am
@@ -12,10 +12,13 @@ libgfapi_la_LIBADD = $(top_builddir)/libglusterfs/src/libglusterfs.la \
 	$(top_builddir)/rpc/xdr/src/libgfxdr.la \
 	$(GF_LDADD)
 
-libgfapi_la_CPPFLAGS = $(GF_CPPFLAGS) -D__USE_FILE_OFFSET64 \
-	-I$(top_srcdir)/libglusterfs/src \
-	-I$(top_srcdir)/rpc/rpc-lib/src \
-	-I$(top_srcdir)/rpc/xdr/src
+AM_CPPFLAGS = $(GF_CPPFLAGS) -I$(top_srcdir)/libglusterfs/src \
+        -I$(top_srcdir)/rpc/rpc-lib/src \
+        -I$(top_srcdir)/rpc/xdr/src \
+        -DDATADIR=\"$(localstatedir)\" \
+        -D__USE_FILE_OFFSET64
+
+AM_CFLAGS = -Wall $(GF_CFLAGS)
 
 libgfapi_la_LDFLAGS = -version-info $(GFAPI_LT_VERSION) \
 	$(GFAPI_EXTRA_LDFLAGS) $(ACL_LIBS)
@@ -35,6 +38,3 @@ api_la_LIBADD = $(top_builddir)/libglusterfs/src/libglusterfs.la \
 	$(top_builddir)/rpc/xdr/src/libgfxdr.la \
 	$(top_builddir)/api/src/libgfapi.la
 
-AM_CPPFLAGS = $(GF_CPPFLAGS) -I$(top_srcdir)/libglusterfs/src
-
-AM_CFLAGS = -Wall $(GF_CFLAGS)
diff --git a/api/src/glfs-mgmt.c b/api/src/glfs-mgmt.c
index 48fd618ff68..593611612b8 100644
--- a/api/src/glfs-mgmt.c
+++ b/api/src/glfs-mgmt.c
@@ -855,11 +855,21 @@ glfs_mgmt_init (struct glfs *fs)
 	if (cmd_args->volfile_server_port)
 		port = cmd_args->volfile_server_port;
 
-	host = "localhost";
-	if (cmd_args->volfile_server)
+	if (cmd_args->volfile_server) {
 		host = cmd_args->volfile_server;
+        } else if (cmd_args->volfile_server_transport &&
+                   !strcmp (cmd_args->volfile_server_transport, "unix")) {
+                host = DEFAULT_GLUSTERD_SOCKFILE;
+        } else {
+                host = "localhost";
+        }
+
+        if (!strcmp (cmd_args->volfile_server_transport, "unix")) {
+                ret = rpc_transport_unix_options_build (&options, host, 0);
+        } else {
+                ret = rpc_transport_inet_options_build (&options, host, port);
+        }
 
-	ret = rpc_transport_inet_options_build (&options, host, port);
 	if (ret)
 		goto out;
 
diff --git a/api/src/glfs.h b/api/src/glfs.h
index b073d8d1b17..d3bf1b4cdcc 100644
--- a/api/src/glfs.h
+++ b/api/src/glfs.h
@@ -164,12 +164,14 @@ int glfs_set_volfile (glfs_t *fs, const char *volfile) __THROW
               management daemon. Specifying NULL will result in the usage
               of the default (tcp) transport type. Permitted values
               are those what you specify as transport-type in a volume
-              specification file (e.g "tcp", "rdma" etc.)
+              specification file (e.g "tcp", "rdma", "unix" etc.)
 
   @host:      String specifying the address where to find the management daemon.
+              Socket path, while using Unix domain socket as transport type.
               This would either be
-              - FQDN (e.g: "storage01.company.com") or
-              - ASCII (e.g: "192.168.22.1")
+              - FQDN (e.g : "storage01.company.com") or
+              - ASCII (e.g : "192.168.22.1") or
+              - Socket path (e.g : "/var/run/glusterd.socket")
 
   NOTE: This API is special, multiple calls to this function with different
         volfile servers, port or transport-type would create a list of volfile