126 	if (sh->qd_idx == sh->disks - 1)  in raid6_d0()
137 /* When walking through the disks in a raid5, starting at raid6_d0,
138  * We need to map each disk to a 'slot', where the data disks are slot
232 		for (i = sh->disks; i--; )  in do_release_stripe()
501 init_stripe_shared_pages(struct stripe_head *sh, struct r5conf *conf, int disks)  in init_stripe_shared_pages()  argument
510 	nr_pages = (disks + cnt - 1) / cnt;  in init_stripe_shared_pages()
591 	sh->disks = previous ? conf->previous_raid_disks : conf->raid_disks;  in init_stripe()
596 	for (i = sh->disks; i--; ) {  in init_stripe()
698 		struct md_rdev *rdev = READ_ONCE(conf->disks[i].rdev);  in raid5_calc_degraded()
701 			rdev = READ_ONCE(conf->disks[i].replacement);  in raid5_calc_degraded()
723 		struct md_rdev *rdev = READ_ONCE(conf->disks[i].rdev);  in raid5_calc_degraded()
726 			rdev = READ_ONCE(conf->disks[i].replacement);  in raid5_calc_degraded()
876 	BUG_ON(sh->overwrite_disks > (sh->disks - sh->raid_conf->max_degraded));  in is_full_stripe_write()
877 	return sh->overwrite_disks == (sh->disks - sh->raid_conf->max_degraded);  in is_full_stripe_write()
1142 	int i, disks = sh->disks;  in ops_run_io()  local
1155 	for (i = disks; i--; ) {  in ops_run_io()
1185 		rdev = conf->disks[i].rdev;  in ops_run_io()
1186 		rrdev = conf->disks[i].replacement;  in ops_run_io()
1443 	for (i = sh->disks; i--; ) {  in ops_complete_biofill()
1482 	for (i = sh->disks; i--; ) {  in ops_run_biofill()
1546 	return (void *) (to_addr_page(percpu, i) + sh->disks + 2);  in to_addr_conv()
1555 	return (unsigned int *) (to_addr_conv(sh, percpu, 0) + sh->disks + 2);  in to_addr_offs()
1561 	int disks = sh->disks;  in ops_run_compute5()  local
1579 	for (i = disks; i--; ) {  in ops_run_compute5()
1601  * @srcs - (struct page *) array of size sh->disks
1615 	int disks = sh->disks;  in set_syndrome_sources()  local
1616 	int syndrome_disks = sh->ddf_layout ? disks : (disks - 2);  in set_syndrome_sources()
1621 	for (i = 0; i < disks; i++)  in set_syndrome_sources()
1649 		i = raid6_next_disk(i, disks);  in set_syndrome_sources()
1658 	int disks = sh->disks;  in ops_run_compute6_1()  local
1702 		for (i = disks; i-- ; ) {  in ops_run_compute6_1()
1722 	int i, count, disks = sh->disks;  in ops_run_compute6_2()  local
1723 	int syndrome_disks = sh->ddf_layout ? disks : disks-2;  in ops_run_compute6_2()
1745 	for (i = 0; i < disks ; i++) {  in ops_run_compute6_2()
1761 		i = raid6_next_disk(i, disks);  in ops_run_compute6_2()
1773 		/* Q disk is one of the missing disks */  in ops_run_compute6_2()
1795 			for (i = disks; i-- ; ) {  in ops_run_compute6_2()
1858 	int disks = sh->disks;  in ops_run_prexor5()  local
1872 	for (i = disks; i--; ) {  in ops_run_prexor5()
1922 	int disks = sh->disks;  in ops_run_biodrain()  local
1929 	for (i = disks; i--; ) {  in ops_run_biodrain()
1993 	int disks = sh->disks;  in ops_complete_reconstruct()  local
2002 	for (i = disks; i--; ) {  in ops_complete_reconstruct()
2008 	for (i = disks; i--; ) {  in ops_complete_reconstruct()
2041 	int disks = sh->disks;  in ops_run_reconstruct5()  local
2057 	for (i = 0; i < sh->disks; i++) {  in ops_run_reconstruct5()
2063 	if (i >= sh->disks) {  in ops_run_reconstruct5()
2080 		for (i = disks; i--; ) {  in ops_run_reconstruct5()
2091 		for (i = disks; i--; ) {  in ops_run_reconstruct5()
2150 	for (i = 0; i < sh->disks; i++) {  in ops_run_reconstruct6()
2156 	if (i >= sh->disks) {  in ops_run_reconstruct6()
2212 	int disks = sh->disks;  in ops_run_check_p()  local
2233 	for (i = disks; i--; ) {  in ops_run_check_p()
2276 	int overlap_clear = 0, i, disks = sh->disks;  in raid_run_ops()  local
2337 		for (i = disks; i--; ) {  in raid_run_ops()
2357 	int disks, struct r5conf *conf)  in alloc_stripe()  argument
2381 		if (init_stripe_shared_pages(sh, conf, disks)) {  in alloc_stripe()
2445  * @num: total number of disks in the array
2529 	 * 3/ reallocate conf->disks to be suitable bigger.  If this fails,  in resize_stripes()
2618 	 * conf->disks and the scribble region  in resize_stripes()
2623 			ndisks[i] = conf->disks[i];  in resize_stripes()
2637 			kfree(conf->disks);  in resize_stripes()
2638 			conf->disks = ndisks;  in resize_stripes()
2721 	int disks = sh->disks, i;  in raid5_end_read_request()  local
2725 	for (i=0 ; i<disks; i++)  in raid5_end_read_request()
2732 	if (i == disks) {  in raid5_end_read_request()
2742 		rdev = conf->disks[i].replacement;  in raid5_end_read_request()
2744 		rdev = conf->disks[i].rdev;  in raid5_end_read_request()
2849 	int disks = sh->disks, i;  in raid5_end_write_request()  local
2853 	for (i = 0 ; i < disks; i++) {  in raid5_end_write_request()
2855 			rdev = conf->disks[i].rdev;  in raid5_end_write_request()
2859 			rdev = conf->disks[i].replacement;  in raid5_end_write_request()
2867 				rdev = conf->disks[i].rdev;  in raid5_end_write_request()
2874 	if (i == disks) {  in raid5_end_write_request()
3162 	int raid_disks = sh->disks;  in raid5_compute_blocknr()
3292  *      like to flush data in journal to RAID disks first, so complex rmw
3312  *      In journal failure, we try to flush all cached data to raid disks
3339 	int i, pd_idx = sh->pd_idx, qd_idx = sh->qd_idx, disks = sh->disks;  in schedule_reconstruction()  local
3352 		for (i = disks; i--; ) {  in schedule_reconstruction()
3381 		if (s->locked + conf->max_degraded == disks)  in schedule_reconstruction()
3391 		for (i = disks; i--; ) {  in schedule_reconstruction()
3485 		for (i = 0; i < sh->disks; i++) {  in stripe_bio_overlaps()
3607 	int disks = previous ? conf->previous_raid_disks : conf->raid_disks;  in stripe_set_idx()  local
3610 			     stripe * (disks - conf->max_degraded)  in stripe_set_idx()
3618 		     struct stripe_head_state *s, int disks)  in handle_failed_stripe()  argument
3622 	for (i = disks; i--; ) {  in handle_failed_stripe()
3627 			struct md_rdev *rdev = conf->disks[i].rdev;  in handle_failed_stripe()
3754 			struct md_rdev *rdev = conf->disks[i].rdev;  in handle_failed_sync()
3762 			rdev = conf->disks[i].replacement;  in handle_failed_sync()
3783 	rdev = sh->raid_conf->disks[disk_idx].replacement;  in want_replace()
3794 			   int disk_idx, int disks)  in need_this_block()  argument
3901 		       int disk_idx, int disks)  in fetch_block()  argument
3906 	if (need_this_block(sh, s, disk_idx, disks)) {  in fetch_block()
3923 		if ((s->uptodate == disks - 1) &&  in fetch_block()
3946 		} else if (s->uptodate == disks-2 && s->failed >= 2) {  in fetch_block()
3951 			for (other = disks; other--; ) {  in fetch_block()
3988 			       int disks)  in handle_stripe_fill()  argument
4002 		 * disks first, this avoids handling complex rmw of write  in handle_stripe_fill()
4012 		for (i = disks; i--; )  in handle_stripe_fill()
4013 			if (fetch_block(sh, s, i, disks))  in handle_stripe_fill()
4028 	struct stripe_head *sh, int disks)  in handle_stripe_clean_event()  argument
4036 	for (i = disks; i--; )  in handle_stripe_clean_event()
4145 				  int disks)  in handle_stripe_dirtying()  argument
4167 	} else for (i = disks; i--; ) {  in handle_stripe_dirtying()
4179 				rmw += 2*disks;  /* cannot read it */  in handle_stripe_dirtying()
4190 				rcw += 2*disks;  in handle_stripe_dirtying()
4202 		for (i = disks; i--; ) {  in handle_stripe_dirtying()
4232 		for (i = disks; i--; ) {  in handle_stripe_dirtying()
4257 		for (i = disks; i--; ) {  in handle_stripe_dirtying()
4285 	if (rcw > disks && rmw > disks &&  in handle_stripe_dirtying()
4307 				struct stripe_head_state *s, int disks)  in handle_parity_checks5()  argument
4318 			BUG_ON(s->uptodate != disks);  in handle_parity_checks5()
4338 		BUG_ON(s->uptodate != disks);  in handle_parity_checks5()
4401 				  int disks)  in handle_parity_checks6()  argument
4586 	for (i = 0; i < sh->disks; i++)  in handle_stripe_expansion()
4652 	int disks = sh->disks;  in analyse_stripe()  local
4666 	for (i=disks; i--; ) {  in analyse_stripe()
4708 		rdev = conf->disks[i].replacement;  in analyse_stripe()
4719 			rdev = conf->disks[i].rdev;  in analyse_stripe()
4765 			struct md_rdev *rdev2 = conf->disks[i].rdev;  in analyse_stripe()
4778 			struct md_rdev *rdev2 = conf->disks[i].rdev;  in analyse_stripe()
4787 			struct md_rdev *rdev2 = conf->disks[i].replacement;  in analyse_stripe()
4809 				rdev = conf->disks[i].replacement;  in analyse_stripe()
4912 		for (i = 0; i < sh->disks; i++) {  in break_stripe_batch_list()
4926 	for (i = 0; i < head_sh->disks; i++)  in break_stripe_batch_list()
4939 	int disks = sh->disks;  in handle_stripe()  local
5023 	 * the stripe if there is data need write to raid disks  in handle_stripe()
5031 			handle_failed_stripe(conf, sh, &s, disks);  in handle_stripe()
5054 		for (i = disks; i--; ) {  in handle_stripe()
5097 		handle_stripe_clean_event(conf, sh, disks);  in handle_stripe()
5100 		r5c_handle_cached_data_endio(conf, sh, disks);  in handle_stripe()
5109 	    || (s.syncing && (s.uptodate + s.compute < disks))  in handle_stripe()
5112 		handle_stripe_fill(sh, &s, disks);  in handle_stripe()
5133 				handle_stripe_dirtying(conf, sh, &s, disks);  in handle_stripe()
5140 							    disks);  in handle_stripe()
5153 							     disks);  in handle_stripe()
5170 			handle_parity_checks6(conf, sh, &s, disks);  in handle_stripe()
5172 			handle_parity_checks5(conf, sh, &s, disks);  in handle_stripe()
5253 		sh->disks = conf->raid_disks;  in handle_stripe()
5283 		for (i = disks; i--; ) {  in handle_stripe()
5288 				rdev = conf->disks[i].rdev;  in handle_stripe()
5295 				rdev = conf->disks[i].rdev;  in handle_stripe()
5301 				rdev = conf->disks[i].replacement;  in handle_stripe()
5304 					rdev = conf->disks[i].rdev;  in handle_stripe()
5466 	rdev = conf->disks[dd_idx].replacement;  in raid5_read_one_chunk()
5469 		rdev = conf->disks[dd_idx].rdev;  in raid5_read_one_chunk()
5826 	for (dd_idx = 0; dd_idx < sh->disks; dd_idx++) {  in stripe_ahead_of_reshape()
5854 	for (dd_idx = 0; dd_idx < sh->disks; dd_idx++) {  in add_all_stripe_bios()
5879 	for (dd_idx = 0; dd_idx < sh->disks; dd_idx++) {  in add_all_stripe_bios()
6038  * If the bio covers multiple data disks, find sector within the bio that has
6385 		for (j=sh->disks; j--;) {  in reshape_request()
6563 		struct md_rdev *rdev = conf->disks[i].rdev;  in raid5_sync_request()
7358 		if (conf->disks[i].extra_page)  in free_conf()
7359 			put_page(conf->disks[i].extra_page);  in free_conf()
7360 	kfree(conf->disks);  in free_conf()
7535 	conf->disks = kcalloc(max_disks, sizeof(struct disk_info),  in setup_conf()
7538 	if (!conf->disks)  in setup_conf()
7542 		conf->disks[i].extra_page = alloc_page(GFP_KERNEL);  in setup_conf()
7543 		if (!conf->disks[i].extra_page)  in setup_conf()
7593 		disk = conf->disks + raid_disk;  in setup_conf()
7755 	 * disks are used to calculate parity); the disk is broken; The stripe  in raid5_set_limits()
7860 		 * be a multiple of the largest chunk size times new data disks.  in raid5_run()
7944 		rdev = conf->disks[i].rdev;  in raid5_run()
7947 		if (conf->disks[i].replacement &&  in raid5_run()
8077 		struct md_rdev *rdev = READ_ONCE(conf->disks[i].rdev);  in raid5_status()
8099 		rdev = conf->disks[i].rdev;  in print_raid5_conf()
8116 		rdev = conf->disks[i].rdev;  in raid5_spare_active()
8117 		replacement = conf->disks[i].replacement;  in raid5_spare_active()
8178 	p = conf->disks + number;  in raid5_remove_disk()
8276 	    conf->disks[rdev->saved_raid_disk].rdev == NULL)  in raid5_add_disk()
8280 		p = conf->disks + disk;  in raid5_add_disk()
8294 		p = conf->disks + disk;  in raid5_add_disk()
8438 		if (conf->disks[i].replacement)  in raid5_start_reshape()
8459 		pr_warn("md/raid:%s: array size must be reduced before number of disks\n",  in raid5_start_reshape()
8588 				rdev = conf->disks[d].rdev;  in raid5_finish_reshape()
8591 				rdev = conf->disks[d].replacement;  in raid5_finish_reshape()