diff --git a/core/reactor.cc b/core/reactor.cc
index 506db746dc..d80554a6a8 100644
--- a/core/reactor.cc
+++ b/core/reactor.cc
@@ -495,6 +495,15 @@ reactor::open_directory(sstring name) {
     });
 }
 
+future<>
+reactor::make_directory(sstring name) {
+    return _thread_pool.submit<syscall_result<int>>([name = std::move(name)] {
+        return wrap_syscall<int>(::mkdir(name.c_str(), S_IRWXU));
+    }).then([] (syscall_result<int> sr) {
+        sr.throw_if_error();
+    });
+}
+
 future<>
 posix_file_impl::flush(void) {
     return engine()._thread_pool.submit<syscall_result<int>>([this] {
@@ -1722,6 +1731,10 @@ future<file> open_directory(sstring name) {
     return engine().open_directory(std::move(name));
 }
 
+future<> make_directory(sstring name) {
+    return engine().make_directory(std::move(name));
+}
+
 future<> remove_file(sstring pathname) {
     return engine().remove_file(std::move(pathname));
 }
diff --git a/core/reactor.hh b/core/reactor.hh
index 7cf30b7ca3..edf21a27c3 100644
--- a/core/reactor.hh
+++ b/core/reactor.hh
@@ -759,6 +759,7 @@ public:
 
     future<file> open_file_dma(sstring name, open_flags flags);
     future<file> open_directory(sstring name);
+    future<> make_directory(sstring name);
     future<std::experimental::optional<directory_entry_type>>  file_type(sstring name);
     future<> remove_file(sstring pathname);
 
diff --git a/core/scollectd.cc b/core/scollectd.cc
index 534fe86d89..add70efbac 100644
--- a/core/scollectd.cc
+++ b/core/scollectd.cc
@@ -34,6 +34,7 @@
 #include "scollectd.hh"
 #include "core/future-util.hh"
 #include "net/api.hh"
+#include "scollectd_api.hh"
 
 bool scollectd::type_instance_id::operator<(
         const scollectd::type_instance_id& id2) const {
@@ -385,6 +386,20 @@ private:
             arm();
         });
     }
+public:
+    shared_ptr<value_list> get_values(const type_instance_id & id) {
+        return _values[id];
+    }
+
+    std::vector<type_instance_id> get_instance_ids() {
+        std::vector<type_instance_id> res(_values.size());
+        int pos = 0;
+        for (auto i: _values) {
+            res[pos++] = i.first;
+        }
+        return res;
+    }
+
 private:
     value_list_map _values;
     std::vector<registration> _regs;
@@ -451,4 +466,39 @@ boost::program_options::options_description get_options_description() {
             "collectd host name");
     return opts;
 }
+
+std::vector<collectd_value> get_collectd_value(
+        shared_ptr<scollectd::type_instance_id> id) {
+    std::vector<collectd_value> res_values;
+    auto raw_types = get_impl().get_values(*id);
+    if (raw_types == nullptr) {
+        return res_values;
+    }
+    std::vector<data_type> types(raw_types->size());
+    raw_types->types(&(*types.begin()));
+    std::vector<net::packed<uint64_t>> value(raw_types->size());
+    raw_types->values(&(*value.begin()));
+
+    auto i = value.begin();
+    for (auto t : types) {
+        collectd_value c(t, be64toh(*i));
+        res_values.push_back(c);
+    }
+    return res_values;
+}
+
+std::vector<data_type> get_collectd_types(
+        const scollectd::type_instance_id& id) {
+    auto res = get_impl().get_values(id);
+    if (res == nullptr) {
+        return std::vector<data_type>();
+    }
+    std::vector<data_type> vals(res->size());
+    res->types(&(*vals.begin()));
+    return vals;
+}
+
+std::vector<scollectd::type_instance_id> get_collectd_ids() {
+    return get_impl().get_instance_ids();
+}
 }
diff --git a/core/scollectd_api.hh b/core/scollectd_api.hh
new file mode 100644
index 0000000000..550c4fe8d4
--- /dev/null
+++ b/core/scollectd_api.hh
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2015 Cloudius Systems
+ */
+
+#ifndef CORE_SCOLLECTD_API_HH_
+#define CORE_SCOLLECTD_API_HH_
+
+#include "core/scollectd.hh"
+
+namespace scollectd {
+
+struct collectd_value {
+    union {
+        double _d;
+        uint64_t _ui;
+        int64_t _i;
+    } u;
+    scollectd::data_type _type;
+    collectd_value()
+            : _type(data_type::GAUGE) {
+    }
+    collectd_value(data_type t, uint64_t i)
+            : _type(t) {
+        u._ui = i;
+    }
+
+    collectd_value& operator=(const collectd_value& c) = default;
+
+    collectd_value& operator+=(const collectd_value& c) {
+        *this = *this + c;
+        return *this;
+    }
+
+    collectd_value operator+(const collectd_value& c) {
+        collectd_value res(*this);
+        switch (_type) {
+        case data_type::GAUGE:
+            res.u._d += c.u._d;
+            break;
+        case data_type::DERIVE:
+            res.u._i += c.u._i;
+            break;
+        default:
+            res.u._ui += c.u._ui;
+            break;
+        }
+        return res;
+    }
+};
+
+std::vector<collectd_value> get_collectd_value(
+        shared_ptr<scollectd::type_instance_id> id);
+
+std::vector<scollectd::type_instance_id> get_collectd_ids();
+
+}
+
+#endif /* CORE_SCOLLECTD_API_HH_ */
diff --git a/core/seastar.hh b/core/seastar.hh
index 8f4bce6601..92622fd6bb 100644
--- a/core/seastar.hh
+++ b/core/seastar.hh
@@ -47,5 +47,6 @@ future<connected_socket> connect(socket_address sa);
 // File API
 future<file> open_file_dma(sstring name, open_flags flags);
 future<file> open_directory(sstring name);
+future<> make_directory(sstring name);
 future<> remove_file(sstring pathname);
 
diff --git a/rpc/rpc_impl.hh b/rpc/rpc_impl.hh
index c44781db31..ed20bac792 100644
--- a/rpc/rpc_impl.hh
+++ b/rpc/rpc_impl.hh
@@ -300,7 +300,7 @@ auto send_helper(MsgType t, std::index_sequence<I...>) {
         auto xargs = std::tie(m->t, m->id, std::get<I>(m->args)...); // holds references to all message elements
         promise<> sent; // will be fulfilled when data is sent
         auto fsent = sent.get_future();
-        dst.out_ready() = dst.out_ready().then([&dst, xargs = std::move(xargs), m = std::move(m), sent = std::move(sent)] () mutable {
+        dst.out_ready() = dst.out_ready().then([&dst, xargs = std::move(xargs), m = std::move(m)] () mutable {
             return marshall(dst.serializer(), dst.out(), std::move(xargs)).then([m = std::move(m)] {});
         }).finally([sent = std::move(sent)] () mutable {
             sent.set_value();