vmm/api: Add vm.add-fs route

Currently unimplemented. Once implemented, this API will allow for
creating virtio-fs devices in the VM after it has booted.

Signed-off-by: Dean Sheather <dean@coder.com>

vmm/src/api/http.rs

@@ -4,8 +4,8 @@
 //
 
 use crate::api::http_endpoint::{
-    VmActionHandler, VmAddDevice, VmAddDisk, VmAddNet, VmAddPmem, VmCreate, VmInfo, VmRemoveDevice,
-    VmResize, VmRestore, VmSnapshot, VmmPing, VmmShutdown,
+    VmActionHandler, VmAddDevice, VmAddDisk, VmAddFs, VmAddNet, VmAddPmem, VmCreate, VmInfo,
+    VmRemoveDevice, VmResize, VmRestore, VmSnapshot, VmmPing, VmmShutdown,
 };
 use crate::api::{ApiRequest, VmAction};
 use crate::seccomp_filters::{get_seccomp_filter, Thread};
@@ -70,6 +70,7 @@ lazy_static! {
         r.routes.insert(endpoint!("/vm.add-device"), Box::new(VmAddDevice {}));
         r.routes.insert(endpoint!("/vm.remove-device"), Box::new(VmRemoveDevice {}));
         r.routes.insert(endpoint!("/vm.add-disk"), Box::new(VmAddDisk {}));
+        r.routes.insert(endpoint!("/vm.add-fs"), Box::new(VmAddFs {}));
         r.routes.insert(endpoint!("/vm.add-pmem"), Box::new(VmAddPmem {}));
         r.routes.insert(endpoint!("/vm.add-net"), Box::new(VmAddNet {}));
 

vmm/src/api/http_endpoint.rs

@@ -487,6 +487,24 @@ impl EndpointHandler for VmAddDisk {
     }
 }
 
+// /api/v1/vm.add-fs handler
+pub struct VmAddFs {}
+
+impl EndpointHandler for VmAddFs {
+    fn handle_request(
+        &self,
+        req: &Request,
+        _api_notifier: EventFd,
+        _api_sender: Sender<ApiRequest>,
+    ) -> Response {
+        match req.method() {
+            // Not implemented.
+            Method::Put => Response::new(Version::Http11, StatusCode::NotImplemented),
+            _ => Response::new(Version::Http11, StatusCode::BadRequest),
+        }
+    }
+}
+
 // /api/v1/vm.add-pmem handler
 pub struct VmAddPmem {}
 

vmm/src/api/openapi/cloud-hypervisor.yaml

@@ -187,6 +187,22 @@ paths:
         500:
           description: The new disk could not be added to the VM instance.
 
+  /vm.add-fs:
+    put:
+      summary: Add a new virtio-fs device to the VM
+      requestBody:
+        description: The details of the new virtio-fs
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/FsConfig'
+        required: true
+      responses:
+        204:
+          description: The new device was successfully added to the VM instance.
+        500:
+          description: The new device could not be added to the VM instance.
+
   /vm.add-pmem:
     put:
       summary: Add a new pmem device to the VM