glusterd/cli: option added to create volume with both transports

to avail the option, enter the volume create command with arguments
'transport tcp,rdma'

and while mounting, on the mountpoints which works on rdma,

do, mount -t glusterfs <IP>:/<VOLNAME>-rdma <MOUNT-POINT>

Signed-off-by: Amar Tumballi <amar@gluster.com>
Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 2294 (Currently there is no way through cli to make a volume listen on both the transports (socket/rdma))
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=2294

3 files changed, 78 insertions, 6 deletions

diff --git a/xlators/mgmt/glusterd/src/glusterd-op-sm.c b/xlators/mgmt/glusterd/src/glusterd-op-sm.c
index 89e6f47c911..501e01cfc4b 100644
--- a/xlators/mgmt/glusterd/src/glusterd-op-sm.c
+++ b/xlators/mgmt/glusterd/src/glusterd-op-sm.c
@@ -2302,9 +2302,12 @@ glusterd_op_create_volume (gd1_mgmt_stage_op_req *req, char **op_errstr)
 
         if (strcasecmp (trans_type, "rdma") == 0) {
                 volinfo->transport_type = GF_TRANSPORT_RDMA;
-        } else {
+        } else if (strcasecmp (trans_type, "tcp") == 0) {
                 volinfo->transport_type = GF_TRANSPORT_TCP;
+        } else {
+                volinfo->transport_type = GF_TRANSPORT_BOTH_TCP_RDMA;
         }
+
         volinfo->sub_count = sub_count;
 
         if (bricks) {
diff --git a/xlators/mgmt/glusterd/src/glusterd-volgen.c b/xlators/mgmt/glusterd/src/glusterd-volgen.c
index 2933b1d8b7a..90b227c0eb6 100644
--- a/xlators/mgmt/glusterd/src/glusterd-volgen.c
+++ b/xlators/mgmt/glusterd/src/glusterd-volgen.c
@@ -907,9 +907,17 @@ build_graph_generic (glusterfs_graph_t *graph, glusterd_volinfo_t *volinfo,
 static void
 get_vol_transport_type (glusterd_volinfo_t *volinfo, char *tt)
 {
-        volinfo->transport_type == GF_TRANSPORT_RDMA ?
-        strcpy (tt, "rdma"):
-        strcpy (tt, "tcp");
+        switch (volinfo->transport_type) {
+        case GF_TRANSPORT_RDMA:
+                strcpy (tt, "rdma");
+                break;
+        case GF_TRANSPORT_TCP:
+                strcpy (tt, "tcp");
+                break;
+        case GF_TRANSPORT_BOTH_TCP_RDMA:
+                strcpy (tt, "tcp,rdma");
+                break;
+        }
 }
 
 static int
@@ -1124,6 +1132,7 @@ client_graph_builder (glusterfs_graph_t *graph, glusterd_volinfo_t *volinfo,
 {
         int                      dist_count         = 0;
         char                     transt[16]         = {0,};
+        char                    *tt                 = NULL;
         char                    *volname            = NULL;
         dict_t                  *dict               = NULL;
         glusterd_brickinfo_t    *brick = NULL;
@@ -1142,7 +1151,6 @@ client_graph_builder (glusterfs_graph_t *graph, glusterd_volinfo_t *volinfo,
         volname = volinfo->volname;
         dict    = volinfo->dict;
         GF_ASSERT (dict);
-        get_vol_transport_type (volinfo, transt);
 
         if (volinfo->brick_count == 0) {
                 gf_log ("", GF_LOG_ERROR,
@@ -1161,6 +1169,12 @@ client_graph_builder (glusterfs_graph_t *graph, glusterd_volinfo_t *volinfo,
                 return -1;
         }
 
+        ret = dict_get_str (set_dict, "client-transport-type", &tt);
+        if (ret)
+                get_vol_transport_type (volinfo, transt);
+        if (!ret)
+                strcpy (transt, tt);
+
         i = 0;
         list_for_each_entry (brick, &volinfo->bricks, brick_list) {
                 xl = volgen_graph_add_nolink (graph, "protocol/client",
@@ -1370,6 +1384,16 @@ build_nfs_graph (glusterfs_graph_t *graph, dict_t *mod_dict)
                                         goto out;
                         }
                 }
+
+                /* If both RDMA and TCP are the transport_type, use RDMA
+                   for NFS client protocols */
+                if (voliter->transport_type == GF_TRANSPORT_BOTH_TCP_RDMA) {
+                        ret = dict_set_str (set_dict, "client-transport-type",
+                                            "rdma");
+                        if (ret)
+                                goto out;
+                }
+
                 memset (&cgraph, 0, sizeof (cgraph));
                 ret = build_client_graph (&cgraph, voliter, set_dict);
                 if (ret)
@@ -1528,21 +1552,65 @@ get_client_filepath (char *filename, glusterd_volinfo_t *volinfo)
                   path, volinfo->volname);
 }
 
+static void
+get_rdma_client_filepath (char *filename, glusterd_volinfo_t *volinfo)
+{
+        char  path[PATH_MAX] = {0,};
+        glusterd_conf_t *priv = NULL;
+
+        priv = THIS->private;
+
+        GLUSTERD_GET_VOLUME_DIR (path, volinfo, priv);
+
+        snprintf (filename, PATH_MAX, "%s/%s-rdma-fuse.vol",
+                  path, volinfo->volname);
+}
+
 static int
 generate_client_volfile (glusterd_volinfo_t *volinfo)
 {
         glusterfs_graph_t graph = {{0,},};
         char    filename[PATH_MAX] = {0,};
         int     ret = -1;
+        dict_t *dict = NULL;
 
         get_client_filepath (filename, volinfo);
 
-        ret = build_client_graph (&graph, volinfo, NULL);
+        if (volinfo->transport_type == GF_TRANSPORT_BOTH_TCP_RDMA) {
+                dict = dict_new ();
+                if (!dict)
+                        goto out;
+                ret = dict_set_str (dict, "client-transport-type", "tcp");
+                if (ret)
+                        goto out;
+        }
+
+        ret = build_client_graph (&graph, volinfo, dict);
         if (!ret)
                 ret = volgen_write_volfile (&graph, filename);
 
         volgen_graph_free (&graph);
 
+        if (dict) {
+                /* This means, transport type is both RDMA and TCP */
+
+                memset (&graph, 0, sizeof (graph));
+                get_rdma_client_filepath (filename, volinfo);
+
+                ret = dict_set_str (dict, "client-transport-type", "rdma");
+                if (ret)
+                        goto out;
+
+                ret = build_client_graph (&graph, volinfo, dict);
+                if (!ret)
+                        ret = volgen_write_volfile (&graph, filename);
+
+                volgen_graph_free (&graph);
+
+                dict_unref (dict);
+        }
+
+out:
         return ret;
 }
 
diff --git a/xlators/mgmt/glusterd/src/glusterd.h b/xlators/mgmt/glusterd/src/glusterd.h
index 43a14f297d6..aca7b7dc705 100644
--- a/xlators/mgmt/glusterd/src/glusterd.h
+++ b/xlators/mgmt/glusterd/src/glusterd.h
@@ -155,6 +155,7 @@ typedef struct glusterd_defrag_info_ glusterd_defrag_info_t;
 typedef enum gf_transport_type_ {
         GF_TRANSPORT_TCP,       //DEFAULT
         GF_TRANSPORT_RDMA,
+        GF_TRANSPORT_BOTH_TCP_RDMA,
 } gf_transport_type;