Add an alternative RDMA implementation via RDMA-CM

Required for non-RoCE cards: iWARP and, possibly, Infiniband

src/osd/osd.cpp

@@ -169,7 +169,15 @@ void osd_t::parse_config(bool init)
         else
             immediate_commit = IMMEDIATE_NONE;
         // Bind address
-        bind_address = config["bind_address"].string_value();
+        cfg_bind_addresses.clear();
+        if (config.find("bind_address") != config.end())
+        {
+            if (config["bind_address"].is_string())
+                cfg_bind_addresses.push_back(config["bind_address"].string_value());
+            else if (config["bind_address"].is_array())
+                for (auto & addr: config["bind_address"].array_items())
+                    cfg_bind_addresses.push_back(addr.string_value());
+        }
         bind_port = config["bind_port"].uint64_value();
         if (bind_port <= 0 || bind_port > 65535)
             bind_port = 0;
@@ -332,9 +340,9 @@ void osd_t::parse_config(bool init)
 
 void osd_t::bind_socket()
 {
-    if (bind_address != "")
+    if (cfg_bind_addresses.size())
     {
-        bind_addresses.push_back(bind_address);
+        bind_addresses = cfg_bind_addresses;
     }
     else if (msgr.all_osd_network_masks.size())
     {

src/osd/osd.h

@@ -107,7 +107,7 @@ class osd_t
     bool no_recovery = false;
     bool no_scrub = false;
     bool allow_net_split = false;
-    std::string bind_address;
+    std::vector<std::string> cfg_bind_addresses;
     int bind_port, listen_backlog = 128;
     bool use_rdmacm = false;
     bool disable_tcp = false;