Merge pull request #61 from robertbaldyga/wait-io-finish-func

Add API function ocf_cache_wait_for_io_finish()

inc/ocf_cache.h

@@ -172,6 +172,13 @@ bool ocf_cache_is_device_attached(ocf_cache_t cache);
  */
 bool ocf_cache_is_running(ocf_cache_t cache);
 
+/**
+ * @brief Wait for all IO to finish
+ *
+ * @param[in] cache Cache object
+ */
+void ocf_cache_wait_for_io_finish(ocf_cache_t cache);
+
 /**
  * @brief Get cache mode of given cache object
  *

src/mngt/ocf_mngt_cache.c

@@ -1559,7 +1559,7 @@ static int _ocf_mngt_cache_unplug(ocf_cache_t cache, bool stop)
 	cache->device = NULL;
 	env_atomic_set(&cache->attached, 0);
 
-	/* TODO: this should  be removed from detach after 'attached' stats
+	/* TODO: this should be removed from detach after 'attached' stats
 		are better separated in statistics */
 	_ocf_mngt_init_attached_nonpersistent(cache);
 
@@ -1579,7 +1579,7 @@ static int _ocf_mngt_cache_stop(ocf_cache_t cache)
 	env_bit_set(ocf_cache_state_stopping, &cache->cache_state);
 	env_bit_clear(ocf_cache_state_running, &cache->cache_state);
 
-	ocf_mngt_wait_for_io_finish(cache);
+	ocf_cache_wait_for_io_finish(cache);
 
 	/* All exported objects removed, cleaning up rest. */
 	for (i = 0, j = 0; j < no && i < OCF_CORE_MAX; i++) {
@@ -1681,7 +1681,7 @@ int ocf_mngt_cache_stop(ocf_cache_t cache)
 {
 	int result;
 	char cache_name[OCF_CACHE_NAME_SIZE];
-	ocf_ctx_t context;
+	ocf_ctx_t ctx;
 
 	OCF_CHECK_NULL(cache);
 
@@ -1690,21 +1690,21 @@ int ocf_mngt_cache_stop(ocf_cache_t cache)
 	if (result)
 		return result;
 
-	context = ocf_cache_get_ctx(cache);
+	ctx = ocf_cache_get_ctx(cache);
 
 	ocf_cache_log(cache, log_info, "Stopping cache\n");
 
 	result = _ocf_mngt_cache_stop(cache);
 
 	if (result == -OCF_ERR_WRITE_CACHE) {
-		ocf_log(context, log_warn, "Stopped cache %s with "
-				"errors\n", cache_name);
+		ocf_log(ctx, log_warn, "Stopped cache %s with errors\n",
+				cache_name);
 	} else if (result) {
-		ocf_log(context, log_err, "Stopping cache %s "
-				"failed\n", cache_name);
+		ocf_log(ctx, log_err, "Stopping cache %s failed\n",
+				cache_name);
 	} else {
-		ocf_log(context, log_info, "Cache %s successfully "
-				"stopped\n", cache_name);
+		ocf_log(ctx, log_info, "Cache %s successfully stopped\n",
+				cache_name);
 	}
 
 	return result;

src/mngt/ocf_mngt_common.c

@@ -434,15 +434,3 @@ int ocf_mngt_cache_visit_reverse(ocf_ctx_t ocf_ctx,
 
 	return result;
 }
-
-void ocf_mngt_wait_for_io_finish(ocf_cache_t cache)
-{
-	uint32_t req_active = 0;
-
-	do {
-		req_active = ocf_req_get_allocated(cache);
-		if (req_active)
-			env_msleep(500);
-	} while (req_active);
-}
-

src/mngt/ocf_mngt_common.h

@@ -24,8 +24,6 @@ int cache_mng_thread_io_requests(void *data);
 
 bool ocf_mngt_cache_is_dirty(ocf_cache_t cache);
 
-void ocf_mngt_wait_for_io_finish(ocf_cache_t cache);
-
 int ocf_mngt_add_partition_to_cache(struct ocf_cache *cache,
 		ocf_part_id_t part_id, const char *name, uint32_t min_size,
 		uint32_t max_size, uint8_t priority, bool valid);

src/ocf_cache.c

@@ -7,6 +7,7 @@
 #include "metadata/metadata.h"
 #include "engine/cache_engine.h"
 #include "utils/utils_cache_line.h"
+#include "utils/utils_req.h"
 #include "ocf_priv.h"
 #include "ocf_cache_priv.h"
 
@@ -51,6 +52,17 @@ bool ocf_cache_is_device_attached(ocf_cache_t cache)
 	return env_atomic_read(&(cache)->attached);
 }
 
+void ocf_cache_wait_for_io_finish(ocf_cache_t cache)
+{
+	uint32_t req_active = 0;
+
+	do {
+		req_active = ocf_req_get_allocated(cache);
+		if (req_active)
+			env_msleep(500);
+	} while (req_active);
+}
+
 ocf_cache_mode_t ocf_cache_get_mode(ocf_cache_t cache)
 {
 	OCF_CHECK_NULL(cache);

src/ocf_queue.c

@@ -39,7 +39,7 @@ static void ocf_init_queue(struct ocf_queue *q)
 	INIT_LIST_HEAD(&q->io_list);
 }
 
-int ocf_start_queues(struct ocf_cache *cache)
+int ocf_start_queues(ocf_cache_t cache)
 {
 	int id, result = 0;
 	struct ocf_queue *q;
@@ -63,17 +63,17 @@ int ocf_start_queues(struct ocf_cache *cache)
 	return result;
 }
 
-void ocf_stop_queues(struct ocf_cache *dev)
+void ocf_stop_queues(ocf_cache_t cache)
 {
 	int i;
 	struct ocf_queue *curr;
 
-	ocf_mngt_wait_for_io_finish(dev);
+	ocf_cache_wait_for_io_finish(cache);
 
 	/* Stop IO threads. */
-	for (i = 0 ; i < dev->io_queues_no; i++) {
-		curr = &dev->io_queues[i];
-		ctx_queue_stop(dev->owner, curr);
+	for (i = 0 ; i < cache->io_queues_no; i++) {
+		curr = &cache->io_queues[i];
+		ctx_queue_stop(cache->owner, curr);
 	}
 }