47 	struct backing_dev_info *bdi = m->private;  in bdi_debug_stats_show()  local
48 	struct bdi_writeback *wb = &bdi->wb;  in bdi_debug_stats_show()
69 	bdi_thresh = bdi_dirty_limit(bdi, dirty_thresh);  in bdi_debug_stats_show()
87 		   (unsigned long) K(bdi_stat(bdi, BDI_WRITEBACK)),  in bdi_debug_stats_show()
88 		   (unsigned long) K(bdi_stat(bdi, BDI_RECLAIMABLE)),  in bdi_debug_stats_show()
92 		   (unsigned long) K(bdi_stat(bdi, BDI_DIRTIED)),  in bdi_debug_stats_show()
93 		   (unsigned long) K(bdi_stat(bdi, BDI_WRITTEN)),  in bdi_debug_stats_show()
94 		   (unsigned long) K(bdi->write_bandwidth),  in bdi_debug_stats_show()
99 		   !list_empty(&bdi->bdi_list), bdi->state);  in bdi_debug_stats_show()
117 static void bdi_debug_register(struct backing_dev_info *bdi, const char *name)  in bdi_debug_register()  argument
119 	bdi->debug_dir = debugfs_create_dir(name, bdi_debug_root);  in bdi_debug_register()
120 	bdi->debug_stats = debugfs_create_file("stats", 0444, bdi->debug_dir,  in bdi_debug_register()
121 					       bdi, &bdi_debug_stats_fops);  in bdi_debug_register()
124 static void bdi_debug_unregister(struct backing_dev_info *bdi)  in bdi_debug_unregister()  argument
126 	debugfs_remove(bdi->debug_stats);  in bdi_debug_unregister()
127 	debugfs_remove(bdi->debug_dir);  in bdi_debug_unregister()
133 static inline void bdi_debug_register(struct backing_dev_info *bdi,  in bdi_debug_register()  argument
137 static inline void bdi_debug_unregister(struct backing_dev_info *bdi)  in bdi_debug_unregister()  argument
146 	struct backing_dev_info *bdi = dev_get_drvdata(dev);  in read_ahead_kb_store()  local
154 	bdi->ra_pages = read_ahead_kb >> (PAGE_SHIFT - 10);  in read_ahead_kb_store()
165 	struct backing_dev_info *bdi = dev_get_drvdata(dev);		\
171 BDI_SHOW(read_ahead_kb, K(bdi->ra_pages))
176 	struct backing_dev_info *bdi = dev_get_drvdata(dev);  in min_ratio_store()  local
184 	ret = bdi_set_min_ratio(bdi, ratio);  in min_ratio_store()
190 BDI_SHOW(min_ratio, bdi->min_ratio)
195 	struct backing_dev_info *bdi = dev_get_drvdata(dev);  in max_ratio_store()  local
203 	ret = bdi_set_max_ratio(bdi, ratio);  in max_ratio_store()
209 BDI_SHOW(max_ratio, bdi->max_ratio)
215 	struct backing_dev_info *bdi = dev_get_drvdata(dev);  in stable_pages_required_show()  local
218 			bdi_cap_stable_pages_required(bdi) ? 1 : 0);  in stable_pages_required_show()
258 int bdi_has_dirty_io(struct backing_dev_info *bdi)  in bdi_has_dirty_io()  argument
260 	return wb_has_dirty_io(&bdi->wb);  in bdi_has_dirty_io()
277 void bdi_wakeup_thread_delayed(struct backing_dev_info *bdi)  in bdi_wakeup_thread_delayed()  argument
282 	spin_lock_bh(&bdi->wb_lock);  in bdi_wakeup_thread_delayed()
283 	if (test_bit(BDI_registered, &bdi->state))  in bdi_wakeup_thread_delayed()
284 		queue_delayed_work(bdi_wq, &bdi->wb.dwork, timeout);  in bdi_wakeup_thread_delayed()
285 	spin_unlock_bh(&bdi->wb_lock);  in bdi_wakeup_thread_delayed()
291 static void bdi_remove_from_list(struct backing_dev_info *bdi)  in bdi_remove_from_list()  argument
294 	list_del_rcu(&bdi->bdi_list);  in bdi_remove_from_list()
300 int bdi_register(struct backing_dev_info *bdi, struct device *parent,  in bdi_register()  argument
306 	if (bdi->dev)	/* The driver needs to use separate queues per device */  in bdi_register()
310 	dev = device_create_vargs(bdi_class, parent, MKDEV(0, 0), bdi, fmt, args);  in bdi_register()
315 	bdi->dev = dev;  in bdi_register()
317 	bdi_debug_register(bdi, dev_name(dev));  in bdi_register()
318 	set_bit(BDI_registered, &bdi->state);  in bdi_register()
321 	list_add_tail_rcu(&bdi->bdi_list, &bdi_list);  in bdi_register()
324 	trace_writeback_bdi_register(bdi);  in bdi_register()
329 int bdi_register_dev(struct backing_dev_info *bdi, dev_t dev)  in bdi_register_dev()  argument
331 	return bdi_register(bdi, NULL, "%u:%u", MAJOR(dev), MINOR(dev));  in bdi_register_dev()
338 static void bdi_wb_shutdown(struct backing_dev_info *bdi)  in bdi_wb_shutdown()  argument
341 	spin_lock_bh(&bdi->wb_lock);  in bdi_wb_shutdown()
342 	if (!test_and_clear_bit(BDI_registered, &bdi->state)) {  in bdi_wb_shutdown()
343 		spin_unlock_bh(&bdi->wb_lock);  in bdi_wb_shutdown()
346 	spin_unlock_bh(&bdi->wb_lock);  in bdi_wb_shutdown()
351 	bdi_remove_from_list(bdi);  in bdi_wb_shutdown()
358 	mod_delayed_work(bdi_wq, &bdi->wb.dwork, 0);  in bdi_wb_shutdown()
359 	flush_delayed_work(&bdi->wb.dwork);  in bdi_wb_shutdown()
362 static void bdi_wb_init(struct bdi_writeback *wb, struct backing_dev_info *bdi)  in bdi_wb_init()  argument
366 	wb->bdi = bdi;  in bdi_wb_init()
381 int bdi_init(struct backing_dev_info *bdi)  in bdi_init()  argument
385 	bdi->dev = NULL;  in bdi_init()
387 	bdi->min_ratio = 0;  in bdi_init()
388 	bdi->max_ratio = 100;  in bdi_init()
389 	bdi->max_prop_frac = FPROP_FRAC_BASE;  in bdi_init()
390 	spin_lock_init(&bdi->wb_lock);  in bdi_init()
391 	INIT_LIST_HEAD(&bdi->bdi_list);  in bdi_init()
392 	INIT_LIST_HEAD(&bdi->work_list);  in bdi_init()
394 	bdi_wb_init(&bdi->wb, bdi);  in bdi_init()
397 		err = percpu_counter_init(&bdi->bdi_stat[i], 0, GFP_KERNEL);  in bdi_init()
402 	bdi->dirty_exceeded = 0;  in bdi_init()
404 	bdi->bw_time_stamp = jiffies;  in bdi_init()
405 	bdi->written_stamp = 0;  in bdi_init()
407 	bdi->balanced_dirty_ratelimit = INIT_BW;  in bdi_init()
408 	bdi->dirty_ratelimit = INIT_BW;  in bdi_init()
409 	bdi->write_bandwidth = INIT_BW;  in bdi_init()
410 	bdi->avg_write_bandwidth = INIT_BW;  in bdi_init()
412 	err = fprop_local_init_percpu(&bdi->completions, GFP_KERNEL);  in bdi_init()
417 			percpu_counter_destroy(&bdi->bdi_stat[i]);  in bdi_init()
424 void bdi_destroy(struct backing_dev_info *bdi)  in bdi_destroy()  argument
428 	bdi_wb_shutdown(bdi);  in bdi_destroy()
429 	bdi_set_min_ratio(bdi, 0);  in bdi_destroy()
431 	WARN_ON(!list_empty(&bdi->work_list));  in bdi_destroy()
432 	WARN_ON(delayed_work_pending(&bdi->wb.dwork));  in bdi_destroy()
434 	if (bdi->dev) {  in bdi_destroy()
435 		bdi_debug_unregister(bdi);  in bdi_destroy()
436 		device_unregister(bdi->dev);  in bdi_destroy()
437 		bdi->dev = NULL;  in bdi_destroy()
441 		percpu_counter_destroy(&bdi->bdi_stat[i]);  in bdi_destroy()
442 	fprop_local_destroy_percpu(&bdi->completions);  in bdi_destroy()
450 int bdi_setup_and_register(struct backing_dev_info *bdi, char *name)  in bdi_setup_and_register()  argument
454 	bdi->name = name;  in bdi_setup_and_register()
455 	bdi->capabilities = 0;  in bdi_setup_and_register()
456 	err = bdi_init(bdi);  in bdi_setup_and_register()
460 	err = bdi_register(bdi, NULL, "%.28s-%ld", name,  in bdi_setup_and_register()
463 		bdi_destroy(bdi);  in bdi_setup_and_register()
477 void clear_bdi_congested(struct backing_dev_info *bdi, int sync)  in clear_bdi_congested()  argument
483 	if (test_and_clear_bit(bit, &bdi->state))  in clear_bdi_congested()
491 void set_bdi_congested(struct backing_dev_info *bdi, int sync)  in set_bdi_congested()  argument
496 	if (!test_and_set_bit(bit, &bdi->state))  in set_bdi_congested()