drivers/md/dm-stripe.c

24 struct stripe {
47 	struct stripe stripe[] __counted_by(stripes);
52  * drops out of a stripe volume.
65 		      unsigned int stripe, char **argv)
75 			    &sc->stripe[stripe].dev);
79 	sc->stripe[stripe].physical_start = start;
103 		ti->error = "Invalid stripe count";
132 	sc = kmalloc(struct_size(sc, stripe, stripes), GFP_KERNEL);
168 	 * Get the stripe destinations.
175 			ti->error = "Couldn't parse stripe destination";
177 				dm_put_device(ti, sc->stripe[i].dev);
181 		atomic_set(&(sc->stripe[i].error_count), 0);
195 		dm_put_device(ti, sc->stripe[i].dev);
202 			      uint32_t *stripe, sector_t *result)
215 		*stripe = sector_div(chunk, sc->stripes);
217 		*stripe = chunk & (sc->stripes - 1);
232 	uint32_t stripe;
234 	stripe_map_sector(sc, sector, &stripe, result);
235 	if (stripe == target_stripe)
245 	if (target_stripe < stripe)
259 		bio_set_dev(bio, sc->stripe[target_stripe].dev->bdev);
261 			sc->stripe[target_stripe].physical_start;
266 	/* The range doesn't map to the target stripe */
274 	uint32_t stripe;
280 		bio_set_dev(bio, sc->stripe[target_bio_nr].dev->bdev);
292 			  &stripe, &bio->bi_iter.bi_sector);
294 	bio->bi_iter.bi_sector += sc->stripe[stripe].physical_start;
295 	bio_set_dev(bio, sc->stripe[stripe].dev->bdev);
306 	uint32_t stripe;
308 	stripe_map_sector(sc, *pgoff * PAGE_SECTORS, &stripe, &dev_sector);
309 	dev_sector += sc->stripe[stripe].physical_start;
310 	bdev = sc->stripe[stripe].dev->bdev;
313 	return sc->stripe[stripe].dev->dax_dev;
355  * #stripes [stripe chunk size]
371 			DMEMIT("%s ", sc->stripe[i].dev->name);
375 			DMEMIT("%c", atomic_read(&(sc->stripe[i].error_count)) ?  'D' : 'A');
382 			DMEMIT(" %s %llu", sc->stripe[i].dev->name,
383 			    (unsigned long long)sc->stripe[i].physical_start);
392 			DMEMIT(",stripe_%d_device_name=%s", i, sc->stripe[i].dev->name);
394 			       (unsigned long long)sc->stripe[i].physical_start);
396 			       atomic_read(&(sc->stripe[i].error_count)) ? 'D' : 'A');
423 	 * Test to see which stripe drive triggered the event
429 		if (!strcmp(sc->stripe[i].dev->name, major_minor)) {
430 			atomic_inc(&(sc->stripe[i].error_count));
431 			if (atomic_read(&(sc->stripe[i].error_count)) <
447 		ret = fn(ti, sc->stripe[i].dev,
448 			 sc->stripe[i].physical_start,