feat: implement cmd management for targets, LUNs, and TPGTs (fixes #36)

- Fix target delete URL path mismatch (/targets/ -> /target/)
- Implement target create/delete server handlers with proper validation
- Add DeleteTarget method with force flag and mutex locking to SCSITargetService
- Implement full LU management: create/list/delete through CLI, client, and server
- Add TPGT list command to show target portal group tags
- Add unit tests for target/LU router handlers and SCSI service

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

pkg/apiserver/router/target/target.go

@@ -16,27 +16,30 @@ limitations under the License.
 package target
 
 import (
+	"encoding/json"
+	"fmt"
 	"net/http"
 
+	"github.com/gostor/gotgt/pkg/api"
 	"github.com/gostor/gotgt/pkg/apiserver/httputils"
 	"github.com/gostor/gotgt/pkg/apiserver/router"
 	"github.com/gostor/gotgt/pkg/scsi"
 	"golang.org/x/net/context"
 )
 
-// containerRouter is a router to talk with the container controller
+// targetRouter is a router to talk with the target controller
 type targetRouter struct {
 	routes []router.Route
 }
 
-// NewRouter initializes a new container router
+// NewRouter initializes a new target router
 func NewRouter() router.Router {
 	r := &targetRouter{}
 	r.initRoutes()
 	return r
 }
 
-// Routes returns the available routers to the container controller
+// Routes returns the available routers to the target controller
 func (r *targetRouter) Routes() []router.Route {
 	return r.routes
 }
@@ -46,10 +49,10 @@ func (r *targetRouter) initRoutes() {
 	r.routes = []router.Route{
 		// GET
 		router.NewGetRoute("/target/list", r.getTargetList),
+		router.NewGetRoute("/target/tpgt/list", r.getTargetTPGTList),
 		// POST
 		router.NewPostRoute("/target/create", r.postTargetCreate),
 		router.NewPostRoute("/target/up", r.postTargetUp),
-		// PUT
 		// DELETE
 		router.NewDeleteRoute("/target/{name:.*}", r.deleteTarget),
 	}
@@ -65,7 +68,20 @@ func (r *targetRouter) getTargetList(ctx context.Context, w http.ResponseWriter,
 }
 
 func (r *targetRouter) postTargetCreate(ctx context.Context, w http.ResponseWriter, req *http.Request, vars map[string]string) error {
-	return nil
+	var opts api.TargetCreateRequest
+	if err := json.NewDecoder(req.Body).Decode(&opts); err != nil {
+		return fmt.Errorf("bad parameter: %v", err)
+	}
+	if opts.Name == "" {
+		return fmt.Errorf("bad parameter: target name is required")
+	}
+
+	service := scsi.NewSCSITargetService()
+	target, err := service.NewSCSITarget(len(service.Targets), "iscsi", opts.Name)
+	if err != nil {
+		return err
+	}
+	return httputils.WriteJSON(w, http.StatusCreated, target)
 }
 
 func (r *targetRouter) postTargetUp(ctx context.Context, w http.ResponseWriter, req *http.Request, vars map[string]string) error {
@@ -73,5 +89,51 @@ func (r *targetRouter) postTargetUp(ctx context.Context, w http.ResponseWriter,
 }
 
 func (r *targetRouter) deleteTarget(ctx context.Context, w http.ResponseWriter, req *http.Request, vars map[string]string) error {
+	name := vars["name"]
+	if name == "" {
+		return fmt.Errorf("bad parameter: target name is required")
+	}
+
+	if err := httputils.ParseForm(req); err != nil {
+		return err
+	}
+	force := httputils.BoolValue(req, "force")
+
+	service := scsi.NewSCSITargetService()
+	if err := service.DeleteTarget(name, force); err != nil {
+		return err
+	}
+	w.WriteHeader(http.StatusNoContent)
 	return nil
 }
+
+func (r *targetRouter) getTargetTPGTList(ctx context.Context, w http.ResponseWriter, req *http.Request, vars map[string]string) error {
+	if err := httputils.ParseForm(req); err != nil {
+		return err
+	}
+	targetName := req.FormValue("target")
+	if targetName == "" {
+		return fmt.Errorf("bad parameter: target name is required")
+	}
+
+	service := scsi.NewSCSITargetService()
+	tgts, err := service.GetTargetList()
+	if err != nil {
+		return err
+	}
+
+	for _, tgt := range tgts {
+		if tgt.Name == targetName {
+			var result []api.TpgtInfo
+			for _, tpg := range tgt.TargetPortGroups {
+				info := api.TpgtInfo{TPGT: tpg.GroupID}
+				for _, port := range tpg.TargetPortGroup {
+					info.Portals = append(info.Portals, port.TargetPortName)
+				}
+				result = append(result, info)
+			}
+			return httputils.WriteJSON(w, http.StatusOK, result)
+		}
+	}
+	return fmt.Errorf("target %q not found", targetName)
+}