waterDataFluctuationCorrelation rtuDataOperationAnalysis.c 张婷 commit at 2021-02-10

waterDataFluctuationCorrelation/fluctuationCorrelationOfSprayEnd/rtuDataOperationAnalysis.c

@@ -402,3 +402,141 @@ static struct queue_sysfs_entry queue_write_same_max_entry = {
 static struct queue_sysfs_entry queue_nonrot_entry = {
 	.attr = {.name = "rotational", .mode = S_IRUGO | S_IWUSR },
 	.show = queue_show_nonrot,
+	.store = queue_store_nonrot,
+};
+
+static struct queue_sysfs_entry queue_nomerges_entry = {
+	.attr = {.name = "nomerges", .mode = S_IRUGO | S_IWUSR },
+	.show = queue_nomerges_show,
+	.store = queue_nomerges_store,
+};
+
+static struct queue_sysfs_entry queue_rq_affinity_entry = {
+	.attr = {.name = "rq_affinity", .mode = S_IRUGO | S_IWUSR },
+	.show = queue_rq_affinity_show,
+	.store = queue_rq_affinity_store,
+};
+
+static struct queue_sysfs_entry queue_iostats_entry = {
+	.attr = {.name = "iostats", .mode = S_IRUGO | S_IWUSR },
+	.show = queue_show_iostats,
+	.store = queue_store_iostats,
+};
+
+static struct queue_sysfs_entry queue_random_entry = {
+	.attr = {.name = "add_random", .mode = S_IRUGO | S_IWUSR },
+	.show = queue_show_random,
+	.store = queue_store_random,
+};
+
+static struct attribute *default_attrs[] = {
+	&queue_requests_entry.attr,
+	&queue_ra_entry.attr,
+	&queue_max_hw_sectors_entry.attr,
+	&queue_max_sectors_entry.attr,
+	&queue_max_segments_entry.attr,
+	&queue_max_integrity_segments_entry.attr,
+	&queue_max_segment_size_entry.attr,
+	&queue_iosched_entry.attr,
+	&queue_hw_sector_size_entry.attr,
+	&queue_logical_block_size_entry.attr,
+	&queue_physical_block_size_entry.attr,
+	&queue_io_min_entry.attr,
+	&queue_io_opt_entry.attr,
+	&queue_discard_granularity_entry.attr,
+	&queue_discard_max_entry.attr,
+	&queue_discard_zeroes_data_entry.attr,
+	&queue_write_same_max_entry.attr,
+	&queue_nonrot_entry.attr,
+	&queue_nomerges_entry.attr,
+	&queue_rq_affinity_entry.attr,
+	&queue_iostats_entry.attr,
+	&queue_random_entry.attr,
+	NULL,
+};
+
+#define to_queue(atr) container_of((atr), struct queue_sysfs_entry, attr)
+
+static ssize_t
+queue_attr_show(struct kobject *kobj, struct attribute *attr, char *page)
+{
+	struct queue_sysfs_entry *entry = to_queue(attr);
+	struct request_queue *q =
+		container_of(kobj, struct request_queue, kobj);
+	ssize_t res;
+
+	if (!entry->show)
+		return -EIO;
+	mutex_lock(&q->sysfs_lock);
+	if (blk_queue_dying(q)) {
+		mutex_unlock(&q->sysfs_lock);
+		return -ENOENT;
+	}
+	res = entry->show(q, page);
+	mutex_unlock(&q->sysfs_lock);
+	return res;
+}
+
+static ssize_t
+queue_attr_store(struct kobject *kobj, struct attribute *attr,
+		    const char *page, size_t length)
+{
+	struct queue_sysfs_entry *entry = to_queue(attr);
+	struct request_queue *q;
+	ssize_t res;
+
+	if (!entry->store)
+		return -EIO;
+
+	q = container_of(kobj, struct request_queue, kobj);
+	mutex_lock(&q->sysfs_lock);
+	if (blk_queue_dying(q)) {
+		mutex_unlock(&q->sysfs_lock);
+		return -ENOENT;
+	}
+	res = entry->store(q, page, length);
+	mutex_unlock(&q->sysfs_lock);
+	return res;
+}
+
+/**
+ * blk_release_queue: - release a &struct request_queue when it is no longer needed
+ * @kobj:    the kobj belonging to the request queue to be released
+ *
+ * Description:
+ *     blk_release_queue is the pair to blk_init_queue() or
+ *     blk_queue_make_request().  It should be called when a request queue is
+ *     being released; typically when a block device is being de-registered.
+ *     Currently, its primary task it to free all the &struct request
+ *     structures that were allocated to the queue and the queue itself.
+ *
+ * Caveat:
+ *     Hopefully the low level driver will have finished any
+ *     outstanding requests first...
+ **/
+static void blk_release_queue(struct kobject *kobj)
+{
+	struct request_queue *q =
+		container_of(kobj, struct request_queue, kobj);
+
+	blk_sync_queue(q);
+
+	blkcg_exit_queue(q);
+
+	if (q->elevator) {
+		spin_lock_irq(q->queue_lock);
+		ioc_clear_queue(q);
+		spin_unlock_irq(q->queue_lock);
+		elevator_exit(q->elevator);
+	}
+
+	blk_exit_rl(&q->root_rl);
+
+	if (q->queue_tags)
+		__blk_queue_free_tags(q);
+
+	blk_trace_shutdown(q);
+
+	bdi_destroy(&q->backing_dev_info);
+
+	ida_simple_remove(&blk_queue_ida, q->id);