Properly lock hash bucket for status bits operations

Signed-off-by: Adam Rutkowski <adam.j.rutkowski@intel.com>

src/engine/engine_rd.c

@@ -164,12 +164,12 @@ static int _ocf_read_generic_do(struct ocf_request *req)
 			return 0;
 		}
 
-		ocf_hb_req_prot_lock_rd(req);
+		ocf_hb_req_prot_lock_wr(req);
 
 		/* Set valid status bits map */
 		ocf_set_valid_map_info(req);
 
-		ocf_hb_req_prot_unlock_rd(req);
+		ocf_hb_req_prot_unlock_wr(req);
 	}
 
 	if (ocf_engine_needs_repart(req)) {

src/engine/engine_wb.c

@@ -27,22 +27,24 @@ static const struct ocf_io_if _io_if_wb_resume = {
 
 static void _ocf_write_wb_update_bits(struct ocf_request *req)
 {
-	if (ocf_engine_is_miss(req)) {
+	bool miss = ocf_engine_is_miss(req);
-		ocf_hb_req_prot_lock_rd(req);
+	bool clean_any = !ocf_engine_is_dirty_all(req);
+
+	if (!miss && !clean_any) {
+		ocf_req_set_cleaning_hot(req);
+		return;
+	}
+
+	ocf_hb_req_prot_lock_wr(req);
+	if (miss) {
 		/* Update valid status bits */
 		ocf_set_valid_map_info(req);
-
-		ocf_hb_req_prot_unlock_rd(req);
 	}
-
+	if (clean_any) {
-	if (!ocf_engine_is_dirty_all(req)) {
-		ocf_hb_req_prot_lock_wr(req);
-
 		/* set dirty bits, and mark if metadata flushing is required */
 		ocf_set_dirty_map_info(req);
-
-		ocf_hb_req_prot_unlock_wr(req);
 	}
+	ocf_hb_req_prot_unlock_wr(req);
 
 	ocf_req_set_cleaning_hot(req);
 }

src/engine/engine_wo.c

@@ -71,6 +71,10 @@ static int ocf_read_wo_cache_do(struct ocf_request *req)
 		s = ocf_map_line_start_sector(req, line);
 		e = ocf_map_line_end_sector(req, line);
 
+		ocf_hb_cline_prot_lock_rd(&cache->metadata.lock,
+				req->lock_idx, entry->core_id,
+				entry->core_line);
+
 		/* if cacheline mapping is not sequential, send cache IO to
 		 * previous cacheline(s) */
 		phys_prev = phys_curr;
@@ -112,6 +116,10 @@ static int ocf_read_wo_cache_do(struct ocf_request *req)
 						== valid);
 			}
 
+			ocf_hb_cline_prot_unlock_rd(&cache->metadata.lock,
+					req->lock_idx, entry->core_id,
+					entry->core_line);
+
 			if (io && !valid) {
 				/* end of sequential valid region */
 				ocf_read_wo_cache_io(req, io_start,
@@ -126,6 +134,12 @@ static int ocf_read_wo_cache_do(struct ocf_request *req)
 			}
 
 			offset += increment;
+
+			if (i <= e) {
+				ocf_hb_cline_prot_lock_rd(&cache->metadata.lock,
+					req->lock_idx, entry->core_id,
+					entry->core_line);
+			}
 		} while (i <= e);
 	}
 

src/engine/engine_wt.c

@@ -97,39 +97,36 @@ static inline void _ocf_write_wt_submit(struct ocf_request *req)
 
 static void _ocf_write_wt_update_bits(struct ocf_request *req)
 {
-	if (ocf_engine_is_miss(req)) {
+	bool miss = ocf_engine_is_miss(req);
-		ocf_hb_req_prot_lock_rd(req);
+	bool dirty_any = req->info.dirty_any;
+	bool repart = ocf_engine_needs_repart(req);
 
+	if (!miss && !dirty_any && !repart)
+		return;
+
+	ocf_hb_req_prot_lock_wr(req);
+
+	if (miss) {
 		/* Update valid status bits */
 		ocf_set_valid_map_info(req);
-
-		ocf_hb_req_prot_unlock_rd(req);
 	}
 
-	if (req->info.dirty_any) {
+	if (dirty_any) {
-		ocf_hb_req_prot_lock_wr(req);
+		/* Writes goes to both cache and core, need to update
-
+		 * status bits from dirty to clean
-		/* Writes goes to SDD and HDD, need to update status bits from
-		 * dirty to clean
 		 */
-
 		ocf_set_clean_map_info(req);
-
-		ocf_hb_req_prot_unlock_wr(req);
 	}
 
-	if (ocf_engine_needs_repart(req)) {
+	if (repart) {
 		OCF_DEBUG_RQ(req, "Re-Part");
-
-		ocf_hb_req_prot_lock_wr(req);
-
 		/* Probably some cache lines are assigned into wrong
 		 * partition. Need to move it to new one
 		 */
 		ocf_part_move(req);
+	}
 
 	ocf_hb_req_prot_unlock_wr(req);
-	}
 }
 
 static int _ocf_write_wt_do(struct ocf_request *req)