Merge pull request #854 from robertbaldyga/request-cleanup

A little cleanup between ocf_request and ocf_io

inc/ocf_io.h

@@ -45,15 +45,6 @@ typedef void (*ocf_handle_io_t)(ocf_io_t io, void *opaque);
  */
 typedef void (*ocf_end_io_t)(ocf_io_t io, void *priv1, void *priv2, int error);
 
-/**
- * @brief Increase reference counter in OCF IO
- *
- * @note Wrapper for get IO operation
- *
- * @param[in] io OCF IO
- */
-void ocf_io_get(ocf_io_t io);
-
 /**
  * @brief Decrease reference counter in OCF IO
  *

src/ocf_core.c

@@ -213,8 +213,7 @@ static void ocf_req_complete(struct ocf_request *req, int error)
 
 	dec_counter_if_req_was_dirty(req);
 
-	/* Invalidate OCF IO, it is not valid after completion */
-	ocf_io_put(req);
+	ocf_req_put(req);
 }
 
 static inline ocf_req_cache_mode_t _ocf_core_req_resolve_fast_mode(
@@ -261,7 +260,7 @@ static void ocf_core_volume_submit_io(ocf_io_t io)
 	struct ocf_request *req = ocf_io_to_req(io);
 	ocf_core_t core;
 	ocf_cache_t cache;
-	int ret;
+	int ret, fastpath;
 
 	OCF_CHECK_NULL(io);
 
@@ -281,7 +280,7 @@ static void ocf_core_volume_submit_io(ocf_io_t io)
 
 	req->complete = ocf_req_complete;
 
-	ocf_io_get(io);
+	ocf_req_get(req);
 
 	if (unlikely(req->d2c)) {
 		ocf_core_update_stats(core, io);
@@ -303,15 +302,15 @@ static void ocf_core_volume_submit_io(ocf_io_t io)
 	 * sequential cutoff info */
 	ocf_req_get(req);
 
-	if (ocf_core_submit_io_fast(req, cache) == OCF_FAST_PATH_YES) {
-		ocf_core_seq_cutoff_update(core, req);
-		ocf_req_put(req);
-		return;
-	}
+	fastpath = ocf_core_submit_io_fast(req, cache);
 
-	ocf_req_put(req);
-	ocf_req_clear_map(req);
 	ocf_core_seq_cutoff_update(core, req);
+	ocf_req_put(req);
+
+	if (fastpath == OCF_FAST_PATH_YES)
+		return;
+
+	ocf_req_clear_map(req);
 
 	ret = ocf_engine_hndl_req(req);
 	if (ret) {
@@ -323,7 +322,7 @@ static void ocf_core_volume_submit_io(ocf_io_t io)
 
 err:
 	ocf_io_end_func(io, ret);
-	ocf_io_put(req);
+	ocf_req_put(req);
 }
 
 static void ocf_core_volume_submit_flush(ocf_io_t io)
@@ -349,7 +348,7 @@ static void ocf_core_volume_submit_flush(ocf_io_t io)
 
 	req->complete = ocf_req_complete;
 
-	ocf_io_get(io);
+	ocf_req_get(req);
 
 	if (unlikely(req->d2c)) {
 		ocf_d2c_flush_fast(req);
@@ -387,7 +386,7 @@ static void ocf_core_volume_submit_discard(ocf_io_t io)
 
 	req->complete = ocf_req_complete;
 
-	ocf_io_get(io);
+	ocf_req_get(req);
 
 	if (unlikely(req->d2c)) {
 		ocf_d2c_discard_fast(req);

src/ocf_io.c

@@ -89,7 +89,6 @@ ocf_io_t ocf_io_new(ocf_volume_t volume, ocf_queue_t queue,
 		return NULL;
 	}
 
-	env_atomic_set(&req->io.ref_count, 1);
 	req->io.volume = volume;
 	req->io.io_class = io_class;
 	req->flags = flags;
@@ -125,22 +124,10 @@ uint32_t ocf_io_get_offset(ocf_io_t io)
 	return req->offset;
 }
 
-void ocf_io_get(ocf_io_t io)
-{
-	struct ocf_request *req = ocf_io_to_req(io);
-
-	env_atomic_inc_return(&req->io.ref_count);
-}
-
 void ocf_io_put(ocf_io_t io)
 {
 	struct ocf_request *req = ocf_io_to_req(io);
-	struct ocf_volume *volume;
-
-	if (env_atomic_dec_return(&req->io.ref_count))
-		return;
-
-	volume = req->io.volume;
+	struct ocf_volume *volume = req->io.volume;
 
 	ocf_io_allocator_del(&volume->type->allocator, (void *)req);
 

src/ocf_request.h

@@ -1,6 +1,6 @@
 /*
  * Copyright(c) 2012-2022 Intel Corporation
- * Copyright(c) 2024 Huawei Technologies
+ * Copyright(c) 2024-2025 Huawei Technologies
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
@@ -129,11 +129,6 @@ struct ocf_request_io {
 	 */
 	uint8_t io_class;
 
-	/**
-	 * @brief OCF IO reference count
-	 */
-	env_atomic ref_count;
-
 	/**
 	 * @brief Front volume handle
 	 */
@@ -259,6 +254,9 @@ struct ocf_request {
 	uint8_t rw : 1;
 	/*!< Indicator of IO direction - Read/Write */
 
+	uint8_t alock_rw: 1;
+	/*!< Read/Write mode for alock*/
+
 	uint8_t d2c : 1;
 	/**!< request affects metadata cachelines (is not direct-to-core) */
 
@@ -300,9 +298,6 @@ struct ocf_request {
 
 	ocf_req_cache_mode_t cache_mode;
 
-	uint64_t timestamp;
-	/*!< Tracing timestamp */
-
 	ocf_queue_t io_queue;
 	/*!< I/O queue handle for which request should be submitted */
 
@@ -317,9 +312,6 @@ struct ocf_request {
 
 	struct ocf_req_discard_info discard;
 
-	uint32_t alock_rw;
-	/*!< Read/Write mode for alock*/
-
 	uint8_t *alock_status;
 	/*!< Mapping for locked/unlocked alock entries */
 

tests/functional/pyocf/types/io.py

@@ -81,9 +81,6 @@ class Io(Structure):
     def put(self):
         OcfLib.getInstance().ocf_io_put(byref(self))
 
-    def get(self):
-        OcfLib.getInstance().ocf_io_get(byref(self))
-
     @staticmethod
     @END
     def c_end(io, priv1, priv2, err):