53 	struct delay_c *dc = from_timer(dc, t, delay_timer);  in handle_delayed_timer()  local
55 	queue_work(dc->kdelayd_wq, &dc->flush_expired_bios);  in handle_delayed_timer()
58 static void queue_timeout(struct delay_c *dc, unsigned long expires)  in queue_timeout()  argument
60 	mutex_lock(&dc->timer_lock);  in queue_timeout()
62 	if (!timer_pending(&dc->delay_timer) || expires < dc->delay_timer.expires)  in queue_timeout()
63 		mod_timer(&dc->delay_timer, expires);  in queue_timeout()
65 	mutex_unlock(&dc->timer_lock);  in queue_timeout()
80 static struct bio *flush_delayed_bios(struct delay_c *dc, int flush_all)  in flush_delayed_bios()  argument
88 	list_for_each_entry_safe(delayed, next, &dc->delayed_bios, list) {  in flush_delayed_bios()
107 		queue_timeout(dc, next_expires);  in flush_delayed_bios()
114 	struct delay_c *dc;  in flush_expired_bios()  local
116 	dc = container_of(work, struct delay_c, flush_expired_bios);  in flush_expired_bios()
117 	flush_bios(flush_delayed_bios(dc, 0));  in flush_expired_bios()
122 	struct delay_c *dc = ti->private;  in delay_dtr()  local
124 	if (dc->kdelayd_wq)  in delay_dtr()
125 		destroy_workqueue(dc->kdelayd_wq);  in delay_dtr()
127 	if (dc->read.dev)  in delay_dtr()
128 		dm_put_device(ti, dc->read.dev);  in delay_dtr()
129 	if (dc->write.dev)  in delay_dtr()
130 		dm_put_device(ti, dc->write.dev);  in delay_dtr()
131 	if (dc->flush.dev)  in delay_dtr()
132 		dm_put_device(ti, dc->flush.dev);  in delay_dtr()
134 	mutex_destroy(&dc->timer_lock);  in delay_dtr()
136 	kfree(dc);  in delay_dtr()
175 	struct delay_c *dc;  in delay_ctr()  local
183 	dc = kzalloc(sizeof(*dc), GFP_KERNEL);  in delay_ctr()
184 	if (!dc) {  in delay_ctr()
189 	ti->private = dc;  in delay_ctr()
190 	timer_setup(&dc->delay_timer, handle_delayed_timer, 0);  in delay_ctr()
191 	INIT_WORK(&dc->flush_expired_bios, flush_expired_bios);  in delay_ctr()
192 	INIT_LIST_HEAD(&dc->delayed_bios);  in delay_ctr()
193 	mutex_init(&dc->timer_lock);  in delay_ctr()
194 	dc->may_delay = true;  in delay_ctr()
195 	dc->argc = argc;  in delay_ctr()
197 	ret = delay_class_ctr(ti, &dc->read, argv);  in delay_ctr()
202 		ret = delay_class_ctr(ti, &dc->write, argv);  in delay_ctr()
205 		ret = delay_class_ctr(ti, &dc->flush, argv);  in delay_ctr()
211 	ret = delay_class_ctr(ti, &dc->write, argv + 3);  in delay_ctr()
215 		ret = delay_class_ctr(ti, &dc->flush, argv + 3);  in delay_ctr()
221 	ret = delay_class_ctr(ti, &dc->flush, argv + 6);  in delay_ctr()
226 	dc->kdelayd_wq = alloc_workqueue("kdelayd", WQ_MEM_RECLAIM, 0);  in delay_ctr()
227 	if (!dc->kdelayd_wq) {  in delay_ctr()
243 static int delay_bio(struct delay_c *dc, struct delay_class *c, struct bio *bio)  in delay_bio()  argument
253 	delayed->context = dc;  in delay_bio()
257 	if (unlikely(!dc->may_delay)) {  in delay_bio()
262 	list_add_tail(&delayed->list, &dc->delayed_bios);  in delay_bio()
265 	queue_timeout(dc, expires);  in delay_bio()
272 	struct delay_c *dc = ti->private;  in delay_presuspend()  local
275 	dc->may_delay = false;  in delay_presuspend()
278 	del_timer_sync(&dc->delay_timer);  in delay_presuspend()
279 	flush_bios(flush_delayed_bios(dc, 1));  in delay_presuspend()
284 	struct delay_c *dc = ti->private;  in delay_resume()  local
286 	dc->may_delay = true;  in delay_resume()
291 	struct delay_c *dc = ti->private;  in delay_map()  local
297 			c = &dc->flush;  in delay_map()
299 			c = &dc->write;  in delay_map()
301 		c = &dc->read;  in delay_map()
308 	return delay_bio(dc, c, bio);  in delay_map()
317 	struct delay_c *dc = ti->private;  in delay_status()  local
322 		DMEMIT("%u %u %u", dc->read.ops, dc->write.ops, dc->flush.ops);  in delay_status()
326 		DMEMIT_DELAY_CLASS(&dc->read);  in delay_status()
327 		if (dc->argc >= 6) {  in delay_status()
329 			DMEMIT_DELAY_CLASS(&dc->write);  in delay_status()
331 		if (dc->argc >= 9) {  in delay_status()
333 			DMEMIT_DELAY_CLASS(&dc->flush);  in delay_status()
346 	struct delay_c *dc = ti->private;  in delay_iterate_devices()  local
349 	ret = fn(ti, dc->read.dev, dc->read.start, ti->len, data);  in delay_iterate_devices()
352 	ret = fn(ti, dc->write.dev, dc->write.start, ti->len, data);  in delay_iterate_devices()
355 	ret = fn(ti, dc->flush.dev, dc->flush.start, ti->len, data);  in delay_iterate_devices()