Lines Matching refs:dc
54 struct delay_c *dc = from_timer(dc, t, delay_timer);
56 queue_work(dc->kdelayd_wq, &dc->flush_expired_bios);
59 static void queue_timeout(struct delay_c *dc, unsigned long expires)
61 mutex_lock(&dc->timer_lock);
63 if (!timer_pending(&dc->delay_timer) || expires < dc->delay_timer.expires)
64 mod_timer(&dc->delay_timer, expires);
66 mutex_unlock(&dc->timer_lock);
81 static struct bio *flush_delayed_bios(struct delay_c *dc, int flush_all)
89 list_for_each_entry_safe(delayed, next, &dc->delayed_bios, list) {
108 queue_timeout(dc, next_expires);
115 struct delay_c *dc;
117 dc = container_of(work, struct delay_c, flush_expired_bios);
118 flush_bios(flush_delayed_bios(dc, 0));
123 struct delay_c *dc = ti->private;
125 if (dc->kdelayd_wq)
126 destroy_workqueue(dc->kdelayd_wq);
128 if (dc->read.dev)
129 dm_put_device(ti, dc->read.dev);
130 if (dc->write.dev)
131 dm_put_device(ti, dc->write.dev);
132 if (dc->flush.dev)
133 dm_put_device(ti, dc->flush.dev);
135 mutex_destroy(&dc->timer_lock);
137 kfree(dc);
176 struct delay_c *dc;
184 dc = kzalloc(sizeof(*dc), GFP_KERNEL);
185 if (!dc) {
190 ti->private = dc;
191 timer_setup(&dc->delay_timer, handle_delayed_timer, 0);
192 INIT_WORK(&dc->flush_expired_bios, flush_expired_bios);
193 INIT_LIST_HEAD(&dc->delayed_bios);
194 mutex_init(&dc->timer_lock);
195 dc->may_delay = true;
196 dc->argc = argc;
198 ret = delay_class_ctr(ti, &dc->read, argv);
203 ret = delay_class_ctr(ti, &dc->write, argv);
206 ret = delay_class_ctr(ti, &dc->flush, argv);
212 ret = delay_class_ctr(ti, &dc->write, argv + 3);
216 ret = delay_class_ctr(ti, &dc->flush, argv + 3);
222 ret = delay_class_ctr(ti, &dc->flush, argv + 6);
227 dc->kdelayd_wq = alloc_workqueue("kdelayd", WQ_MEM_RECLAIM, 0);
228 if (!dc->kdelayd_wq) {
245 static int delay_bio(struct delay_c *dc, struct delay_class *c, struct bio *bio)
255 delayed->context = dc;
259 if (unlikely(!dc->may_delay)) {
264 list_add_tail(&delayed->list, &dc->delayed_bios);
267 queue_timeout(dc, expires);
274 struct delay_c *dc = ti->private;
277 dc->may_delay = false;
280 del_timer_sync(&dc->delay_timer);
281 flush_bios(flush_delayed_bios(dc, 1));
286 struct delay_c *dc = ti->private;
288 dc->may_delay = true;
293 struct delay_c *dc = ti->private;
299 c = &dc->flush;
301 c = &dc->write;
303 c = &dc->read;
309 return delay_bio(dc, c, bio);
318 struct delay_c *dc = ti->private;
323 DMEMIT("%u %u %u", dc->read.ops, dc->write.ops, dc->flush.ops);
327 DMEMIT_DELAY_CLASS(&dc->read);
328 if (dc->argc >= 6) {
330 DMEMIT_DELAY_CLASS(&dc->write);
332 if (dc->argc >= 9) {
334 DMEMIT_DELAY_CLASS(&dc->flush);
347 struct delay_c *dc = ti->private;
350 ret = fn(ti, dc->read.dev, dc->read.start, ti->len, data);
353 ret = fn(ti, dc->write.dev, dc->write.start, ti->len, data);
356 ret = fn(ti, dc->flush.dev, dc->flush.start, ti->len, data);