diff --git a/.travis-ci.sh b/.travis-ci.sh
deleted file mode 100755
index 2be6255..0000000
--- a/.travis-ci.sh
+++ /dev/null
@@ -1,39 +0,0 @@
-OPAM_DEPENDS="xapi-idl async async_inotify core message-switch xapi-storage"
-case "$OCAML_VERSION,$OPAM_VERSION" in
-3.12.1,1.0.0) ppa=avsm/ocaml312+opam10 ;;
-3.12.1,1.1.0) ppa=avsm/ocaml312+opam11 ;;
-4.00.1,1.0.0) ppa=avsm/ocaml40+opam10 ;;
-4.00.1,1.1.0) ppa=avsm/ocaml40+opam11 ;;
-4.01.0,1.0.0) ppa=avsm/ocaml41+opam10 ;;
-4.01.0,1.1.0) ppa=avsm/ocaml41+opam11 ;;
-*) echo Unknown $OCAML_VERSION,$OPAM_VERSION; exit 1 ;;
-esac
-
-echo "yes" | sudo add-apt-repository ppa:$ppa
-sudo apt-get update -qq
-sudo apt-get install -qq ocaml ocaml-native-compilers camlp4-extra opam
-
-export OPAMYES=1
-#export OPAMVERBOSE=1
-echo OCaml version
-ocaml -version
-echo OPAM versions
-opam --version
-opam --git-version
-
-opam init
-# ocamlscript doesn't read .ocamlinit so the ocamlfind opam workaround breaks.
-# This is a workaround workaround:
-opam install ocamlfind
-sudo mkdir -p $(ocamlc -where)
-eval `opam config env`
-sudo cp $OCAML_TOPLEVEL_PATH/topfind $(ocamlc -where)
-
-opam remote add xapi git://github.com/xapi-project/opam-repo-dev
-depext=`opam install -e ubuntu $OPAM_DEPENDS`
-sudo apt-get install -qq $depext
-opam install ${OPAM_DEPENDS}
-eval `opam config env`
-make
-echo Running make test
-make test
diff --git a/.travis.yml b/.travis.yml
index 1957db9..a0a920e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,6 @@
 language: c
-script: bash -ex .travis-ci.sh
+install: wget https://raw.githubusercontent.com/ocaml/ocaml-travisci-skeleton/master/.travis-opam.sh
+script: bash -ex .travis-opam.sh
+sudo: true
 env:
-  - OCAML_VERSION=4.01.0 OPAM_VERSION=1.1.0
+        - OCAML_VERSION=4.01 PACKAGE=xapi-storage-script FORK_USER=djs55 EXTRA_REMOTE=git://github.com/xapi-project/opam-repo-dev
diff --git a/CHANGES b/CHANGES
index b7d405a..c5a6f5f 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,9 @@
+0.2.0 (4-Apr-2015)
+- Update to SMAPIv2 with o_direct, o_direct_reason
+- Update to using json marshalling for exception backtraces
+- Use modern travis configuration
+- Add opam file for development
+
 0.1.2 (19-Oct-2014)
 - Treat VDI.epoch_{begin,end} as no-ops
 - Write the pidfile when daemonizing
diff --git a/VERSION b/VERSION
index d917d3e..0ea3a94 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.1.2
+0.2.0
diff --git a/main.ml b/main.ml
index bcae918..21585b3 100644
--- a/main.ml
+++ b/main.ml
@@ -42,18 +42,10 @@ let backend_error name args =
   Exception.rpc_of_exnty exnty
 
 let backend_backtrace_error name args error =
-  match List.zip error.files error.lines with
-  | None -> backend_error "SCRIPT_FAILED" [ "malformed backtrace in error output" ]
-  | Some pairs ->
-    let backtrace =
-      pairs
-      |> List.map ~f:(fun (filename, line) -> { B.Interop.filename; line })
-      |> B.Interop.to_backtrace
-      |> B.sexp_of_t
-      |> Sexplib.Sexp.to_string in
-    let open Storage_interface in
-    let exnty = Exception.Backend_error_with_backtrace(name, backtrace :: args) in
-    Exception.rpc_of_exnty exnty
+  let error = rpc_of_error error |> Jsonrpc.to_string in
+  let open Storage_interface in
+  let exnty = Exception.Backend_error_with_backtrace(name, error :: args) in
+  Exception.rpc_of_exnty exnty
 
 let missing_uri () =
   backend_error "MISSING_URI" [ "Please include a URI in the device-config" ]
@@ -361,7 +353,9 @@ let process root_dir name x =
     | Storage.D.Types.Tapdisk3 p -> "vbd3", p in
     let attach_info = {
       params;
-      xenstore_data = [ "backend-kind", backend ]
+      xenstore_data = [ "backend-kind", backend ];
+      o_direct = true;
+      o_direct_reason = "";
     } in
     Deferred.Result.return (R.success (Args.VDI.Attach.rpc_of_response attach_info))
   | { R.name = "VDI.activate"; R.params = [ args ] } ->
diff --git a/opam b/opam
new file mode 100644
index 0000000..c032049
--- /dev/null
+++ b/opam
@@ -0,0 +1,17 @@
+opam-version: "1"
+maintainer: "dave.scott@citrix.com"
+build: [
+  [make]
+  [make "install" "BINDIR=%{bin}%" "MANDIR=%{man}%"]
+]
+remove: [
+  [make "uninstall" "BINDIR=%{bin}%" "MANDIR=%{man}%"]
+]
+depends: [
+  "xapi-idl" {>= "0.10.0" }
+  "xapi-storage"
+  "async" {= "111.25.00" }
+  "async_inotify" {= "111.28.00" }
+  "core"
+  "message-switch"
+]