Merge pull request #786 from robertbaldyga/cleaner-unlock-mngt-fix

cleaner: Unlock cache mngt lock from queue context

src/cleaning/acp.c

@@ -1,5 +1,6 @@
 /*
  * Copyright(c) 2012-2022 Intel Corporation
+ * Copyright(c) 2024 Huawei Technologies
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
@@ -652,6 +653,7 @@ static void _acp_flush(struct acp_context *acp)
 		.lock_cacheline = false,
 		.lock_metadata = true,
 		.do_sort = false,
+		.cmpl_queue = true,
 		.io_queue = cache->cleaner.io_queue,
 	};
 

src/cleaning/alru.c

@@ -1,6 +1,7 @@
 /*
  * Copyright(c) 2012-2022 Intel Corporation
  * Copyright(c) 2022      David Lee <live4thee@gmail.com>
+ * Copyright(c) 2024 Huawei Technologies
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
@@ -941,6 +942,7 @@ void cleaning_alru_perform_cleaning(ocf_cache_t cache, ocf_cleaner_end_t cmpl)
 	fctx->attribs.lock_metadata = false;
 	fctx->attribs.do_sort = true;
 	fctx->attribs.io_queue = cache->cleaner.io_queue;
+	fctx->attribs.cmpl_queue = true;
 
 	fctx->clines_no = config->flush_max_buffers;
 	fctx->cache = cache;

src/ocf_request.h

@@ -1,5 +1,6 @@
 /*
  * Copyright(c) 2012-2022 Intel Corporation
+ * Copyright(c) 2024 Huawei Technologies
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
@@ -194,6 +195,9 @@ struct ocf_request {
 	uint8_t part_evict : 1;
 	/* !< Some cachelines from request's partition must be evicted */
 
+	uint8_t complete_queue : 1;
+	/* !< Request needs to be completed from the queue context */
+
 	uint8_t lock_idx : OCF_METADATA_GLOBAL_LOCK_IDX_BITS;
 	/* !< Selected global metadata read lock */
 

src/utils/utils_cleaner.c

@@ -1,5 +1,6 @@
 /*
  * Copyright(c) 2012-2022 Intel Corporation
+ * Copyright(c) 2024 Huawei Technologies
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
@@ -85,6 +86,7 @@ static struct ocf_request *_ocf_cleaner_alloc_master_req(
 		/* In master, save completion context and function */
 		req->priv = attribs->cmpl_context;
 		req->master_io_req = attribs->cmpl_fn;
+		req->complete_queue = attribs->cmpl_queue;
 
 		/* The count of all requests */
 		env_atomic_set(&req->master_remaining, 1);
@@ -167,6 +169,22 @@ static void _ocf_cleaner_set_error(struct ocf_request *req)
 	master->error = -OCF_ERR_IO;
 }
 
+static int _ocf_cleaner_complete(struct ocf_request *master)
+{
+	ocf_req_end_t cmpl;
+
+	cmpl = master->master_io_req;
+	cmpl(master->priv, master->error);
+	ocf_req_put(master);
+
+	return 0;
+}
+
+static const struct ocf_io_if _io_if_cleaner_complete = {
+        .read = _ocf_cleaner_complete,
+        .write = _ocf_cleaner_complete,
+};
+
 static void _ocf_cleaner_complete_req(struct ocf_request *req)
 {
 	struct ocf_request *master = NULL;
@@ -193,9 +211,15 @@ static void _ocf_cleaner_complete_req(struct ocf_request *req)
 
 	OCF_DEBUG_MSG(req->cache, "All cleaning request completed");
 
-	/* Only master contains completion function and completion context */
+	if (master->complete_queue) {
+		ocf_req_get(master);
+		ocf_engine_push_req_front_if(master,
+				&_io_if_cleaner_complete, true);
+	} else {
+		/* Only master contains completion function and priv */
 		cmpl = master->master_io_req;
 		cmpl(master->priv, master->error);
+	}
 }
 
 static void _ocf_cleaner_on_resume(struct ocf_request *req)

src/utils/utils_cleaner.h

@@ -1,5 +1,6 @@
 /*
  * Copyright(c) 2012-2021 Intel Corporation
+ * Copyright(c) 2024 Huawei Technologies
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
@@ -30,6 +31,8 @@ struct ocf_cleaner_attribs {
 	uint8_t  lock_metadata : 1;	/*!< Cleaner to lock metadata on its own */
 
 	uint8_t  do_sort : 1;	/*!< Sort cache lines which will be cleaned */
+	uint8_t  cmpl_queue : 1;
+		/*!< Completion needs to be called from the queue context */
 
 	uint32_t count; /*!< max number of cache lines to be cleaned */