drivers/md/dm-writecache.c

1255 		struct bio_vec bv = bio_iter_iovec(bio, bio->bi_iter);
1307 			writecache_discard(wc, bio->bi_iter.bi_sector,
1344 			read_original_sector(wc, e) - bio->bi_iter.bi_sector;
1345 		if (next_boundary < bio->bi_iter.bi_size >> SECTOR_SHIFT)
1357 	e = writecache_find_entry(wc, bio->bi_iter.bi_sector, WFE_RETURN_FOLLOWING);
1358 	if (e && read_original_sector(wc, e) == bio->bi_iter.bi_sector) {
1362 			if (bio->bi_iter.bi_size)
1368 			bio->bi_iter.bi_sector = cache_sector(wc, e);
1375 		wc->stats.reads += (bio->bi_iter.bi_size - wc->block_size) >> wc->block_size_bits;
1389 	while (bio_size < bio->bi_iter.bi_size) {
1395 			write_original_sector_seq_count(wc, f, bio->bi_iter.bi_sector +
1422 	bio->bi_iter.bi_sector = start_cache_sec;
1425 	wc->stats.writes += bio->bi_iter.bi_size >> wc->block_size_bits;
1426 	wc->stats.writes_allocate += (bio->bi_iter.bi_size - wc->block_size) >> wc->block_size_bits;
1445 			wc->stats.writes += bio->bi_iter.bi_size >> wc->block_size_bits;
1448 		e = writecache_find_entry(wc, bio->bi_iter.bi_sector, 0);
1471 				e = writecache_find_entry(wc, bio->bi_iter.bi_sector, WFE_RETURN_FOLLOWING);
1473 				wc->stats.writes_around += bio->bi_iter.bi_size >> wc->block_size_bits;
1474 				wc->stats.writes += bio->bi_iter.bi_size >> wc->block_size_bits;
1481 		write_original_sector_seq_count(wc, e, bio->bi_iter.bi_sector, wc->seq_count);
1493 	} while (bio->bi_iter.bi_size);
1527 	wc->stats.discards += bio->bi_iter.bi_size >> wc->block_size_bits;
1533 		writecache_discard(wc, bio->bi_iter.bi_sector, bio_end_sector(bio));
1555 	bio->bi_iter.bi_sector = dm_target_offset(ti, bio->bi_iter.bi_sector);
1557 	if (unlikely((((unsigned int)bio->bi_iter.bi_sector | bio_sectors(bio)) &
1560 		      (unsigned long long)bio->bi_iter.bi_sector,
1561 		      bio->bi_iter.bi_size, wc->block_size);
1849 		bio->bi_iter.bi_sector = read_original_sector(wc, e);