From aca40c76a375c2debd2090dc883b1fcd344a2a19 Mon Sep 17 00:00:00 2001
From: Ziming Huang <1520787127@qq.com>
Date: Tue, 25 Nov 2025 11:49:51 +0800
Subject: [PATCH] [BugFix] Adapt mooncake_connector_v1 to latest vllm (#1080)

---
 .../mooncake/mooncake_connector_v1.py         | 32 +++++++++++++------
 1 file changed, 23 insertions(+), 9 deletions(-)

diff --git a/mooncake-wheel/mooncake/mooncake_connector_v1.py b/mooncake-wheel/mooncake/mooncake_connector_v1.py
index fd607460..8dc29b89 100644
--- a/mooncake-wheel/mooncake/mooncake_connector_v1.py
+++ b/mooncake-wheel/mooncake/mooncake_connector_v1.py
@@ -9,6 +9,7 @@ Proxy: Running vllm_v1_proxy_server.py
 import contextlib
 import threading
 import time
+import importlib.metadata
 from collections import defaultdict
 from collections.abc import Iterator
 from concurrent.futures import ThreadPoolExecutor
@@ -22,7 +23,7 @@ import numpy as np
 import torch
 import zmq
 
-from vllm.attention.selector import backend_name_to_enum, get_attn_backend
+from vllm.attention.selector import get_attn_backend
 from vllm.config import VllmConfig
 from vllm.distributed.kv_transfer.kv_connector.v1.base import (
     KVConnectorBase_V1, KVConnectorMetadata, KVConnectorRole)
@@ -30,8 +31,10 @@ from vllm.distributed.parallel_state import (get_tensor_model_parallel_rank,
                                              get_tp_group)
 from vllm.forward_context import ForwardContext
 from vllm.logger import init_logger
-from vllm.platforms import _Backend
-from vllm.utils import get_ip, make_zmq_path, make_zmq_socket
+try:
+    from vllm.utils import get_ip, make_zmq_path, make_zmq_socket
+except ImportError:
+    from vllm.utils.network_utils import get_ip, make_zmq_path, make_zmq_socket
 from vllm.v1.attention.backends.utils import get_kv_cache_layout
 from vllm.v1.core.sched.output import SchedulerOutput
 from vllm.v1.request import RequestStatus
@@ -114,8 +117,9 @@ class MooncakeConnector(KVConnectorBase_V1):
     def __init__(self, vllm_config: VllmConfig, role: KVConnectorRole):
         assert vllm_config.kv_transfer_config is not None
         assert vllm_config.kv_transfer_config.engine_id is not None
+        super().__init__(vllm_config, role)
         self.engine_id: EngineId = vllm_config.kv_transfer_config.engine_id
-
+        
         if role == KVConnectorRole.SCHEDULER:
             self.connector_scheduler: Optional[MooncakeConnectorScheduler] = \
                 MooncakeConnectorScheduler(vllm_config, self.engine_id)
@@ -425,12 +429,22 @@ class MooncakeConnectorWorker:
                                    self.model_config.dtype,
                                    self.cache_config.cache_dtype,
                                    self.block_size,
-                                   self.model_config.is_attention_free,
                                    use_mla=self.use_mla)
         self.backend_name = backend.get_name()
-        attn_backend = backend_name_to_enum(self.backend_name)
-        self._use_flashinfer = attn_backend == _Backend.FLASHINFER_VLLM_V1
-        self._use_pallas_v1 = attn_backend == _Backend.PALLAS_VLLM_V1
+        vllm_version = importlib.metadata.version("vllm")
+        if vllm_version.startswith("0.11.0"):
+            from vllm.attention.selector import backend_name_to_enum
+            from vllm.platforms import _Backend
+            attn_backend = backend_name_to_enum(self.backend_name)
+            self._use_flashinfer = attn_backend == _Backend.FLASHINFER_VLLM_V1
+            self._use_pallas_v1 = attn_backend == _Backend.PALLAS_VLLM_V1
+        elif vllm_version.startswith("0.11.1") or vllm_version.startswith("0.11.2"):
+            from vllm.attention.selector import AttentionBackendEnum
+            attn_backend = AttentionBackendEnum[self.backend_name]
+            self._use_flashinfer = attn_backend in [AttentionBackendEnum.FLASHINFER, AttentionBackendEnum.FLASHINFER_MLA]
+            self._use_pallas_v1 = attn_backend == AttentionBackendEnum.PALLAS
+        else:
+            raise Exception("Unsupported vllm version %s", vllm_version)
         self.kv_cache_layout = get_kv_cache_layout()
         logger.debug("Detected attention backend %s", self.backend_name)
         logger.debug("Detected kv cache layout %s", self.kv_cache_layout)
@@ -759,4 +773,4 @@ def group_concurrent_contiguous(
     src_groups = [g.tolist() for g in src_groups]
     dst_groups = [g.tolist() for g in dst_groups]
 
-    return src_groups, dst_groups
+    return src_groups, dst_groups
\ No newline at end of file