block/drbd/drbd_bitmap.c

304 static unsigned int bm_bit_to_page_idx(struct drbd_bitmap *b, u64 bitnr)
306 	/* page_nr = (bitnr/8) >> PAGE_SHIFT; */
307 	unsigned int page_nr = bitnr >> (PAGE_SHIFT + 3);
1383  * wants bitnr, not sector.
1391 	unsigned long bitnr;
1401 	for (bitnr = s; bitnr <= e; bitnr++) {
1402 		unsigned int page_nr = bm_bit_to_page_idx(b, bitnr);
1416 			c += (0 == __test_and_set_bit_le(bitnr & BITS_PER_PAGE_MASK, p_addr));
1418 			c -= (0 != __test_and_clear_bit_le(bitnr & BITS_PER_PAGE_MASK, p_addr));
1434  * wants bitnr, not sector */
1575  * wants bitnr, NOT sector.
1581 int drbd_bm_test_bit(struct drbd_device *device, const unsigned long bitnr)
1596 	if (bitnr < b->bm_bits) {
1597 		p_addr = bm_map_pidx(b, bm_bit_to_page_idx(b, bitnr));
1598 		i = test_bit_le(bitnr & BITS_PER_PAGE_MASK, p_addr) ? 1 : 0;
1600 	} else if (bitnr == b->bm_bits) {
1602 	} else { /* (bitnr > b->bm_bits) */
1603 		drbd_err(device, "bitnr=%lu > bm_bits=%lu\n", bitnr, b->bm_bits);
1617 	unsigned long bitnr;
1633 	for (bitnr = s; bitnr <= e; bitnr++) {
1634 		unsigned int idx = bm_bit_to_page_idx(b, bitnr);
1641 		if (expect(device, bitnr < b->bm_bits))
1642 			c += (0 != test_bit_le(bitnr - (page_nr << (PAGE_SHIFT+3)), p_addr));
1644 			drbd_err(device, "bitnr=%lu bm_bits=%lu\n", bitnr, b->bm_bits);