Add os-volume_upload_image action to volumeactions (#240)

* Add os-volume_upload_image action to volumeactions

* Code updates to align with style guide
diff --git a/openstack/blockstorage/extensions/volumeactions/requests.go b/openstack/blockstorage/extensions/volumeactions/requests.go
index 1aff494..e3c7df3 100644
--- a/openstack/blockstorage/extensions/volumeactions/requests.go
+++ b/openstack/blockstorage/extensions/volumeactions/requests.go
@@ -214,3 +214,40 @@
 	})
 	return
 }
+
+// UploadImageOptsBuilder allows extensions to add additional parameters to the
+// UploadImage request.
+type UploadImageOptsBuilder interface {
+	ToVolumeUploadImageMap() (map[string]interface{}, error)
+}
+
+// UploadImageOpts contains options for uploading a Volume to image storage.
+type UploadImageOpts struct {
+	// Container format, may be bare, ofv, ova, etc.
+	ContainerFormat string `json:"container_format,omitempty"`
+	// Disk format, may be raw, qcow2, vhd, vdi, vmdk, etc.
+	DiskFormat string `json:"disk_format,omitempty"`
+	// The name of image that will be stored in glance
+	ImageName string `json:"image_name,omitempty"`
+	// Force image creation, usable if volume attached to instance
+	Force bool `json:"force,omitempty"`
+}
+
+// ToVolumeUploadImageMap assembles a request body based on the contents of a
+// UploadImageOpts.
+func (opts UploadImageOpts) ToVolumeUploadImageMap() (map[string]interface{}, error) {
+	return gophercloud.BuildRequestBody(opts, "os-volume_upload_image")
+}
+
+// UploadImage will upload image base on the values in UploadImageOptsBuilder
+func UploadImage(client *gophercloud.ServiceClient, id string, opts UploadImageOptsBuilder) (r UploadImageResult) {
+	b, err := opts.ToVolumeUploadImageMap()
+	if err != nil {
+		r.Err = err
+		return
+	}
+	_, r.Err = client.Post(uploadURL(client, id), b, nil, &gophercloud.RequestOpts{
+		OkCodes: []int{202},
+	})
+	return
+}
diff --git a/openstack/blockstorage/extensions/volumeactions/results.go b/openstack/blockstorage/extensions/volumeactions/results.go
index b5695b7..634b04d 100644
--- a/openstack/blockstorage/extensions/volumeactions/results.go
+++ b/openstack/blockstorage/extensions/volumeactions/results.go
@@ -17,6 +17,11 @@
 	gophercloud.ErrResult
 }
 
+// UploadImageResult contains the response body and error from a UploadImage request.
+type UploadImageResult struct {
+	gophercloud.ErrResult
+}
+
 // ReserveResult contains the response body and error from a Get request.
 type ReserveResult struct {
 	gophercloud.ErrResult
diff --git a/openstack/blockstorage/extensions/volumeactions/testing/fixtures.go b/openstack/blockstorage/extensions/volumeactions/testing/fixtures.go
index 4c3c0dd..d914097 100644
--- a/openstack/blockstorage/extensions/volumeactions/testing/fixtures.go
+++ b/openstack/blockstorage/extensions/volumeactions/testing/fixtures.go
@@ -74,6 +74,31 @@
 		})
 }
 
+func MockUploadImageResponse(t *testing.T) {
+	th.Mux.HandleFunc("/volumes/cd281d77-8217-4830-be95-9528227c105c/action",
+		func(w http.ResponseWriter, r *http.Request) {
+			th.TestMethod(t, r, "POST")
+			th.TestHeader(t, r, "X-Auth-Token", fake.TokenID)
+			th.TestHeader(t, r, "Content-Type", "application/json")
+			th.TestHeader(t, r, "Accept", "application/json")
+			th.TestJSONRequest(t, r, `
+{
+    "os-volume_upload_image": {
+        "container_format": "bare",
+        "force": true,
+        "image_name": "test",
+        "disk_format": "raw"
+    }
+}
+          `)
+
+			w.Header().Add("Content-Type", "application/json")
+			w.WriteHeader(http.StatusAccepted)
+
+			fmt.Fprintf(w, `{}`)
+		})
+}
+
 func MockReserveResponse(t *testing.T) {
 	th.Mux.HandleFunc("/volumes/cd281d77-8217-4830-be95-9528227c105c/action",
 		func(w http.ResponseWriter, r *http.Request) {
diff --git a/openstack/blockstorage/extensions/volumeactions/testing/requests_test.go b/openstack/blockstorage/extensions/volumeactions/testing/requests_test.go
index b1f7af7..6132161 100644
--- a/openstack/blockstorage/extensions/volumeactions/testing/requests_test.go
+++ b/openstack/blockstorage/extensions/volumeactions/testing/requests_test.go
@@ -44,6 +44,21 @@
 	th.AssertNoErr(t, err)
 }
 
+func TestUploadImage(t *testing.T) {
+	th.SetupHTTP()
+	defer th.TeardownHTTP()
+	MockUploadImageResponse(t)
+	options := &volumeactions.UploadImageOpts{
+		ContainerFormat: "bare",
+		DiskFormat:      "raw",
+		ImageName:       "test",
+		Force:           true,
+	}
+
+	err := volumeactions.UploadImage(client.ServiceClient(), "cd281d77-8217-4830-be95-9528227c105c", options).ExtractErr()
+	th.AssertNoErr(t, err)
+}
+
 func TestReserve(t *testing.T) {
 	th.SetupHTTP()
 	defer th.TeardownHTTP()
diff --git a/openstack/blockstorage/extensions/volumeactions/urls.go b/openstack/blockstorage/extensions/volumeactions/urls.go
index a172549..5efd2b2 100644
--- a/openstack/blockstorage/extensions/volumeactions/urls.go
+++ b/openstack/blockstorage/extensions/volumeactions/urls.go
@@ -14,6 +14,10 @@
 	return attachURL(c, id)
 }
 
+func uploadURL(c *gophercloud.ServiceClient, id string) string {
+	return attachURL(c, id)
+}
+
 func reserveURL(c *gophercloud.ServiceClient, id string) string {
 	return attachURL(c, id)
 }