drivers/md/raid5.c

574 static void stripe_set_idx(sector_t stripe, struct r5conf *conf, int previous,
577 static void init_stripe(struct stripe_head *sh, sector_t sector, int previous)
591 	sh->generation = conf->generation - previous;
592 	sh->disks = previous ? conf->previous_raid_disks : conf->raid_disks;
594 	stripe_set_idx(sector, conf, previous, sh);
609 		dev->sector = raid5_compute_blocknr(sh, i, previous);
711 			 * this 'previous' section is not in_sync.
810 	int previous = !!(flags & R5_GAS_PREVIOUS);
835 		sh = find_get_stripe(conf, sector, conf->generation - previous,
844 				init_stripe(sh, sector, previous);
2959 			      int previous, int *dd_idx,
2968 	int algorithm = previous ? conf->prev_algo
2970 	int sectors_per_chunk = previous ? conf->prev_chunk_sectors
2972 	int raid_disks = previous ? conf->previous_raid_disks
3160 sector_t raid5_compute_blocknr(struct stripe_head *sh, int i, int previous)
3166 	int sectors_per_chunk = previous ? conf->prev_chunk_sectors
3168 	int algorithm = previous ? conf->prev_algo
3270 				     previous, &dummy1, &sh2);
3506 			     int dd_idx, int forwrite, int previous)
3523 	if (!forwrite || previous)
3584 			   int dd_idx, int forwrite, int previous)
3594 	__add_stripe_bio(sh, bi, dd_idx, forwrite, previous);
3601 static void stripe_set_idx(sector_t stripe, struct r5conf *conf, int previous,
3605 		previous ? conf->prev_chunk_sectors : conf->chunk_sectors;
3608 	int disks = previous ? conf->previous_raid_disks : conf->raid_disks;
3613 			     previous,
5856 		struct bio *bi, int forwrite, int previous)
5893 		__add_stripe_bio(sh, bi, dd_idx, forwrite, previous);
5911 	int previous = 0, flags = 0;
5929 			previous = 1;
5941 	new_sector = raid5_compute_sector(conf, logical_sector, previous,
5946 	if (previous)
5957 	if (unlikely(previous) &&
5978 	    !add_all_stripe_bios(conf, ctx, sh, bi, rw, previous)) {
6129 	 * previous IOs in case of sequential IO and thus creates the most
7268 		/* size is defined by the smallest of previous and new size */