Allocate io and request in single allocation

Signed-off-by: Robert Baldyga <robert.baldyga@intel.com>

src/engine/cache_engine.c

@@ -254,6 +254,8 @@ int ocf_engine_hndl_req(struct ocf_request *req,
 	if (!req->io_if)
 		return -OCF_ERR_INVAL;
 
+	ocf_req_get(req);
+
 	/* Till OCF engine is not synchronous fully need to push OCF request
 	 * to into OCF workers
 	 */
@@ -273,6 +275,8 @@ int ocf_engine_hndl_fast_req(struct ocf_request *req,
 	if (!io_if)
 		return -OCF_ERR_INVAL;
 
+	ocf_req_get(req);
+
 	switch (req->rw) {
 	case OCF_READ:
 		ret = io_if->read(req);
@@ -281,9 +285,12 @@ int ocf_engine_hndl_fast_req(struct ocf_request *req,
 		ret = io_if->write(req);
 		break;
 	default:
-		return OCF_FAST_PATH_NO;
+		ret = OCF_FAST_PATH_NO;
 	}
 
+	if (ret == OCF_FAST_PATH_NO)
+		ocf_req_put(req);
+
 	return ret;
 }
 
@@ -299,6 +306,8 @@ static void ocf_engine_hndl_2dc_req(struct ocf_request *req)
 
 void ocf_engine_hndl_discard_req(struct ocf_request *req)
 {
+	ocf_req_get(req);
+
 	if (req->d2c) {
 		ocf_engine_hndl_2dc_req(req);
 		return;
@@ -314,6 +323,8 @@ void ocf_engine_hndl_discard_req(struct ocf_request *req)
 
 void ocf_engine_hndl_ops_req(struct ocf_request *req)
 {
+	ocf_req_get(req);
+
 	if (req->d2c)
 		req->io_if = &IO_IFS[OCF_IO_D2C_IF];
 	else

src/engine/engine_d2c.c

@@ -42,7 +42,7 @@ int ocf_io_d2c(struct ocf_request *req)
 
 	OCF_DEBUG_TRACE(req->cache);
 
-	ocf_io_start(req->io);
+	ocf_io_start(&req->ioi.io);
 
 	/* Get OCF request - increase reference counter */
 	ocf_req_get(req);

src/engine/engine_discard.c

@@ -255,7 +255,7 @@ int ocf_discard(struct ocf_request *req)
 {
 	OCF_DEBUG_TRACE(req->cache);
 
-	ocf_io_start(req->io);
+	ocf_io_start(&req->ioi.io);
 
 	if (req->rw == OCF_READ) {
 		req->complete(req, -OCF_ERR_INVAL);

src/engine/engine_fast.c

@@ -128,7 +128,7 @@ int ocf_read_fast(struct ocf_request *req)
 
 	hit = ocf_engine_is_hit(req);
 	if (hit) {
-		ocf_io_start(req->io);
+		ocf_io_start(&req->ioi.io);
 		lock = ocf_req_trylock_rd(req);
 	}
 
@@ -198,7 +198,7 @@ int ocf_write_fast(struct ocf_request *req)
 
 	mapped = ocf_engine_is_mapped(req);
 	if (mapped) {
-		ocf_io_start(req->io);
+		ocf_io_start(&req->ioi.io);
 		lock = ocf_req_trylock_wr(req);
 	}
 

src/engine/engine_pt.c

@@ -110,7 +110,7 @@ int ocf_read_pt(struct ocf_request *req)
 
 	OCF_DEBUG_TRACE(req->cache);
 
-	ocf_io_start(req->io);
+	ocf_io_start(&req->ioi.io);
 
 	/* Get OCF request - increase reference counter */
 	ocf_req_get(req);

src/engine/engine_rd.c

@@ -217,7 +217,7 @@ int ocf_read_generic(struct ocf_request *req)
 	int lock = OCF_LOCK_NOT_ACQUIRED;
 	struct ocf_cache *cache = req->cache;
 
-	ocf_io_start(req->io);
+	ocf_io_start(&req->ioi.io);
 
 	if (env_atomic_read(&cache->pending_read_misses_list_blocked)) {
 		/* There are conditions to bypass IO */

src/engine/engine_wa.c

@@ -40,7 +40,7 @@ int ocf_write_wa(struct ocf_request *req)
 {
 	struct ocf_cache *cache = req->cache;
 
-	ocf_io_start(req->io);
+	ocf_io_start(&req->ioi.io);
 
 	/* Get OCF request - increase reference counter */
 	ocf_req_get(req);

src/engine/engine_wb.c

@@ -172,7 +172,7 @@ int ocf_write_wb(struct ocf_request *req)
 	int lock = OCF_LOCK_NOT_ACQUIRED;
 	struct ocf_cache *cache = req->cache;
 
-	ocf_io_start(req->io);
+	ocf_io_start(&req->ioi.io);
 
 	/* Not sure if we need this. */
 	ocf_req_get(req);

src/engine/engine_wi.c

@@ -140,7 +140,7 @@ int ocf_write_wi(struct ocf_request *req)
 
 	OCF_DEBUG_TRACE(req->cache);
 
-	ocf_io_start(req->io);
+	ocf_io_start(&req->ioi.io);
 
 	/* Get OCF request - increase reference counter */
 	ocf_req_get(req);

src/engine/engine_wo.c

@@ -207,7 +207,7 @@ int ocf_read_wo(struct ocf_request *req)
 
 	OCF_DEBUG_TRACE(req->cache);
 
-	ocf_io_start(req->io);
+	ocf_io_start(&req->ioi.io);
 
 	/* Get OCF request - increase reference counter */
 	ocf_req_get(req);

src/engine/engine_wt.c

@@ -167,7 +167,7 @@ int ocf_write_wt(struct ocf_request *req)
 	int lock = OCF_LOCK_NOT_ACQUIRED;
 	struct ocf_cache *cache = req->cache;
 
-	ocf_io_start(req->io);
+	ocf_io_start(&req->ioi.io);
 
 	/* Get OCF request - increase reference counter */
 	ocf_req_get(req);