fix: read a Supermicro X10 with only the OOB license over Redfish (0.3.1)

First run against real hardware over Redfish: an X10DRL-i (BMC 3.91) with
SFT-OOB-LIC. Its Redfish tree is recorded under
tests/fixtures/supermicro-x10drl-i-3.91/redfish, scrubbed.

- A resource refused for want of a further license (403 OemLicenseNotPassed)
  no longer fails the getter. Storage then falls back to SimpleStorage. The
  firmware list falls back to the BMC and BIOS versions when UpdateService
  is withheld.
- get_device_warnings reports bmc_license_partial with the licenses and the
  withheld parts (drives, firmware inventory).
- A placeholder system model ("Super Server") is replaced by the board
  (PartNumber, else the chassis model).

napalm_redfish/driver.py

@@ -67,6 +67,7 @@ from napalm_redfish.parsers import (
 from napalm_redfish.parsers.common import link, link_list, odata_id
 from napalm_redfish.transport import (
     RedfishError,
+    RedfishFeatureLicenseError,
     RedfishLicenseError,
     RedfishNotFound,
     RedfishTransport,
@@ -87,6 +88,11 @@ _PROTOCOLS = {
     "virtual_media": "VirtualMedia",
 }
 _SEVERITIES = ("OK", "Warning", "Critical")
+#: The parts a BMC may withhold for want of a license, in the order they are named.
+_WITHHELD_ORDER = ("drives", "firmware inventory")
+#: Models a system reports when it has none of its own. Supermicro's Redfish calls every
+#: system "Super Server"; the board is the system's PartNumber and the chassis model.
+_PLACEHOLDER_MODELS = frozenset({"super server", "default string", "to be filled by o.e.m."})
 
 
 def _timestamp(created: str | None) -> float | None:
@@ -162,6 +168,8 @@ class RedfishDriver(HealthMetricsMixin, ManagementControllerDriver):
         )
         self._cache: _JsonDict = {}
         self._license_refused: RedfishLicenseError | None = None
+        #: Parts the BMC withholds for want of a license, with the licenses it names.
+        self._withheld: dict[str, str] = {}
 
     # --- connection ----------------------------------------------------------------------
 
@@ -171,6 +179,7 @@ class RedfishDriver(HealthMetricsMixin, ManagementControllerDriver):
         ``get_device_warnings`` says which license is missing. Every other getter raises.
         """
         self._license_refused = None
+        self._withheld = {}
         try:
             self.transport.open()
         except RedfishLicenseError as exc:
@@ -234,6 +243,15 @@ class RedfishDriver(HealthMetricsMixin, ManagementControllerDriver):
     def _chassis_raw(self) -> _JsonDict:
         return self._linked_or_first("chassis", "Chassis", "Chassis")
 
+    def _server_model(self) -> str:
+        """The system's model; for a placeholder, the board (PartNumber or chassis model)."""
+        raw = self._system_raw()
+        model = (parse_system(raw)["model"] or "").strip()
+        if model.lower() not in _PLACEHOLDER_MODELS:
+            return model
+        board = raw.get("PartNumber") or self._chassis_raw().get("Model") or ""
+        return str(board).strip() or model
+
     def _members_of(self, resource: _JsonDict, key: str) -> list[_JsonDict]:
         """Members of the collection ``resource[key]`` links; [] if not linked."""
         path = link(resource, key)
@@ -271,7 +289,7 @@ class RedfishDriver(HealthMetricsMixin, ManagementControllerDriver):
         return {
             "uptime": -1.0,  # Redfish has no uptime
             "vendor": system["manufacturer"] or "",
-            "model": system["model"] or "",
+            "model": self._server_model(),
             "hostname": hostname,
             "fqdn": fqdn,
             "os_version": manager["firmware_version"] or "",
@@ -355,12 +373,41 @@ class RedfishDriver(HealthMetricsMixin, ManagementControllerDriver):
         return {"chassis_id": "", "community": communities, "contact": "", "location": ""}
 
     def get_device_warnings(self) -> list[_JsonDict]:
-        """Raw signals for netOrk's warning catalog; presentation is netOrk's."""
+        """Raw signals for netOrk's warning catalog; presentation is netOrk's.
+
+        ``bmc_license_required`` when the BMC refuses Redfish altogether;
+        ``bmc_license_partial`` when it answers but withholds parts (drives, the firmware
+        inventory) for want of a license. The parts are probed here, so the warning does
+        not depend on which getters ran before.
+        """
         refused = self._license_refused
-        if refused is None:
+        if refused is not None:
+            return [{"code": "bmc_license_required",
+                     "meta": {"licenses": refused.licenses, "message": refused.detail}}]
+        self._probe_withheld()
+        if not self._withheld:
             return []
-        return [{"code": "bmc_license_required",
-                 "meta": {"licenses": refused.licenses, "message": refused.detail}}]
+        licenses = sorted({name for names in self._withheld.values() for name in names.split()})
+        parts = [part for part in _WITHHELD_ORDER if part in self._withheld]
+        return [{"code": "bmc_license_partial",
+                 "meta": {"licenses": " ".join(licenses), "parts": parts}}]
+
+    def _withhold(self, part: str, exc: RedfishFeatureLicenseError) -> None:
+        LOG.info("%s: %s withheld by the BMC: %s", self.hostname, part, exc)
+        self._withheld[part] = exc.licenses
+
+    def _probe_withheld(self) -> None:
+        """Ask for the license-gated resources once, so ``_withheld`` is complete."""
+        storage = link(self._system_raw(), "Storage")
+        if storage and "drives" not in self._withheld:
+            try:
+                self.transport.get(storage)
+            except RedfishFeatureLicenseError as exc:
+                self._withhold("drives", exc)
+            except RedfishError:
+                pass
+        if "firmware inventory" not in self._withheld:
+            self._update_service()
 
     # --- role: power -------------------------------------------------------------------
 
@@ -434,7 +481,7 @@ class RedfishDriver(HealthMetricsMixin, ManagementControllerDriver):
         system = parse_system(raw)
         return {
             "manufacturer": system["manufacturer"] or "",
-            "model": system["model"] or "",
+            "model": self._server_model(),
             "serial_number": system["serial_number"] or "",
             "system_uuid": (system["uuid"] or "").lower(),
             "cpus": self._cpus(raw),
@@ -471,18 +518,31 @@ class RedfishDriver(HealthMetricsMixin, ManagementControllerDriver):
             })
         return dimms
 
-    def _drives(self, system: _JsonDict) -> list[_JsonDict]:
+    def _storage_drives(self, system: _JsonDict) -> list[_JsonDict] | None:
+        """Drives from ``Storage``; ``None`` when it is not linked or withheld."""
+        if not link(system, "Storage"):
+            return None
+        try:
+            storages = self._members_of(system, "Storage")
+        except RedfishFeatureLicenseError as exc:
+            self._withhold("drives", exc)
+            return None
         parsed: list[_JsonDict] = []
-        if link(system, "Storage"):
-            seen: set[str] = set()
-            for storage in self._members_of(system, "Storage"):
-                for path in parse_storage(storage)["drive_paths"]:
-                    if path not in seen:
-                        seen.add(path)
-                        drive = self.transport.get_optional(path)
-                        if drive is not None:
-                            parsed.append(parse_drive(drive))
-        else:
+        seen: set[str] = set()
+        for storage in storages:
+            for path in parse_storage(storage)["drive_paths"]:
+                if path not in seen:
+                    seen.add(path)
+                    drive = self.transport.get_optional(path)
+                    if drive is not None:
+                        parsed.append(parse_drive(drive))
+        return parsed
+
+    def _drives(self, system: _JsonDict) -> list[_JsonDict]:
+        parsed = self._storage_drives(system)
+        if parsed is None:
+            # Older services, and a Supermicro X10 that withholds Storage without DCMS.
+            parsed = []
             for storage in self._members_of(system, "SimpleStorage"):
                 parsed.extend(parse_simple_storage(storage)["drives"])
         return [{
@@ -569,10 +629,25 @@ class RedfishDriver(HealthMetricsMixin, ManagementControllerDriver):
                      reverse=True)
         return entries[:limit]
 
+    def _update_service(self) -> _JsonDict | None:
+        try:
+            return self._service("UpdateService")
+        except RedfishFeatureLicenseError as exc:
+            self._withhold("firmware inventory", exc)
+            return None
+
     def get_firmware_inventory(self) -> list[_JsonDict]:
-        service = self._service("UpdateService")
+        """``UpdateService/FirmwareInventory``. Where the BMC withholds it for want of a
+        license, the BMC's own firmware and the BIOS, which the manager and the system
+        state themselves."""
+        service = self._update_service()
         if service is None:
-            return []
+            if "firmware inventory" not in self._withheld:
+                return []
+            bmc = parse_manager(self._manager_raw())["firmware_version"]
+            bios = self._system_raw().get("BiosVersion")
+            return [{"name": name, "version": version, "updateable": None}
+                    for name, version in (("BMC", bmc), ("BIOS", bios)) if version]
         items = [parse_firmware(raw) for raw in self._members_of(service, "FirmwareInventory")]
         return [{"name": fw["name"] or fw["id"] or "", "version": fw["version"] or "",
                  "updateable": fw["updateable"]} for fw in items]