drivers/md/raid5.c

150 	if (idx == sh->pd_idx)
285 				WARN_ON(test_bit(R5_InJournal, &sh->dev[sh->pd_idx].flags));
923 	/* Don't cross chunks, so stripe pd_idx/qd_idx is the same */
953 	while (dd_idx == sh->pd_idx || dd_idx == sh->qd_idx)
1631 		if (i == sh->qd_idx || i == sh->pd_idx ||
1862 	int count = 0, pd_idx = sh->pd_idx, i;
1866 	unsigned int off_dest = off_srcs[count] = sh->dev[pd_idx].offset;
1867 	struct page *xor_dest = xor_srcs[count++] = sh->dev[pd_idx].page;
1995 	int pd_idx = sh->pd_idx;
2012 		if (dev->written || i == pd_idx || i == qd_idx) {
2046 	int count, pd_idx = sh->pd_idx, i;
2059 		if (pd_idx == i)
2066 		set_bit(R5_Discard, &sh->dev[pd_idx].flags);
2079 		off_dest = off_srcs[count] = sh->dev[pd_idx].offset;
2080 		xor_dest = xor_srcs[count++] = sh->dev[pd_idx].page;
2090 		xor_dest = sh->dev[pd_idx].page;
2091 		off_dest = sh->dev[pd_idx].offset;
2094 			if (i != pd_idx) {
2152 		if (sh->pd_idx == i || sh->qd_idx == i)
2159 		set_bit(R5_Discard, &sh->dev[sh->pd_idx].flags);
2214 	int pd_idx = sh->pd_idx;
2230 	xor_dest = sh->dev[pd_idx].page;
2231 	off_dest = sh->dev[pd_idx].offset;
2235 		if (i == pd_idx || i == qd_idx)
2822 			if (sh->qd_idx >= 0 && sh->pd_idx == i)
2965 	int pd_idx, qd_idx;
2993 	pd_idx = qd_idx = -1;
2996 		pd_idx = data_disks;
3001 			pd_idx = data_disks - sector_div(stripe2, raid_disks);
3002 			if (*dd_idx >= pd_idx)
3006 			pd_idx = sector_div(stripe2, raid_disks);
3007 			if (*dd_idx >= pd_idx)
3011 			pd_idx = data_disks - sector_div(stripe2, raid_disks);
3012 			*dd_idx = (pd_idx + 1 + *dd_idx) % raid_disks;
3015 			pd_idx = sector_div(stripe2, raid_disks);
3016 			*dd_idx = (pd_idx + 1 + *dd_idx) % raid_disks;
3019 			pd_idx = 0;
3023 			pd_idx = data_disks;
3033 			pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);
3034 			qd_idx = pd_idx + 1;
3035 			if (pd_idx == raid_disks-1) {
3038 			} else if (*dd_idx >= pd_idx)
3042 			pd_idx = sector_div(stripe2, raid_disks);
3043 			qd_idx = pd_idx + 1;
3044 			if (pd_idx == raid_disks-1) {
3047 			} else if (*dd_idx >= pd_idx)
3051 			pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);
3052 			qd_idx = (pd_idx + 1) % raid_disks;
3053 			*dd_idx = (pd_idx + 2 + *dd_idx) % raid_disks;
3056 			pd_idx = sector_div(stripe2, raid_disks);
3057 			qd_idx = (pd_idx + 1) % raid_disks;
3058 			*dd_idx = (pd_idx + 2 + *dd_idx) % raid_disks;
3062 			pd_idx = 0;
3067 			pd_idx = data_disks;
3075 			pd_idx = sector_div(stripe2, raid_disks);
3076 			qd_idx = pd_idx + 1;
3077 			if (pd_idx == raid_disks-1) {
3080 			} else if (*dd_idx >= pd_idx)
3091 			pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);
3092 			qd_idx = pd_idx + 1;
3093 			if (pd_idx == raid_disks-1) {
3096 			} else if (*dd_idx >= pd_idx)
3103 			pd_idx = raid_disks - 1 - sector_div(stripe2, raid_disks);
3104 			qd_idx = (pd_idx + raid_disks - 1) % raid_disks;
3105 			*dd_idx = (pd_idx + 1 + *dd_idx) % raid_disks;
3111 			pd_idx = data_disks - sector_div(stripe2, raid_disks-1);
3112 			if (*dd_idx >= pd_idx)
3118 			pd_idx = sector_div(stripe2, raid_disks-1);
3119 			if (*dd_idx >= pd_idx)
3125 			pd_idx = data_disks - sector_div(stripe2, raid_disks-1);
3126 			*dd_idx = (pd_idx + 1 + *dd_idx) % (raid_disks-1);
3131 			pd_idx = sector_div(stripe2, raid_disks-1);
3132 			*dd_idx = (pd_idx + 1 + *dd_idx) % (raid_disks-1);
3137 			pd_idx = 0;
3149 		sh->pd_idx = pd_idx;
3180 	if (i == sh->pd_idx)
3188 			if (i > sh->pd_idx)
3193 			if (i < sh->pd_idx)
3195 			i -= (sh->pd_idx + 1);
3214 			if (sh->pd_idx == raid_disks-1)
3216 			else if (i > sh->pd_idx)
3221 			if (sh->pd_idx == raid_disks-1)
3225 				if (i < sh->pd_idx)
3227 				i -= (sh->pd_idx + 2);
3237 			if (sh->pd_idx == 0)
3241 				if (i < sh->pd_idx)
3243 				i -= (sh->pd_idx + 1);
3248 			if (i > sh->pd_idx)
3253 			if (i < sh->pd_idx)
3255 			i -= (sh->pd_idx + 1);
3271 	if (check != sh->sector || dummy1 != dd_idx || sh2.pd_idx != sh->pd_idx
3340 	int i, pd_idx = sh->pd_idx, qd_idx = sh->qd_idx, disks = sh->disks;
3386 		BUG_ON(!(test_bit(R5_UPTODATE, &sh->dev[pd_idx].flags) ||
3387 			test_bit(R5_Wantcompute, &sh->dev[pd_idx].flags)));
3394 			if (i == pd_idx || i == qd_idx)
3421 	set_bit(R5_LOCKED, &sh->dev[pd_idx].flags);
3422 	clear_bit(R5_UPTODATE, &sh->dev[pd_idx].flags);
3437 	    test_bit(R5_Insync, &sh->dev[pd_idx].flags))
3487 			if (i != sh->pd_idx &&
3737 	if (test_and_clear_bit(R5_Overlap, &sh->dev[sh->pd_idx].flags))
3861 		     s->failed_num[i] == sh->pd_idx ||
3883 		if (s->failed_num[i] != sh->pd_idx &&
3923 		    ((sh->qd_idx >= 0 && sh->pd_idx == disk_idx) ||
4085 	    test_bit(R5_Discard, &sh->dev[sh->pd_idx].flags)) {
4087 		clear_bit(R5_Discard, &sh->dev[sh->pd_idx].flags);
4088 		clear_bit(R5_UPTODATE, &sh->dev[sh->pd_idx].flags);
4170 		     i == sh->pd_idx || i == sh->qd_idx ||
4182 		    i != sh->pd_idx && i != sh->qd_idx &&
4205 			    !test_bit(R5_LOCKED, &sh->dev[sh->pd_idx].flags)) {
4234 			     i == sh->pd_idx || i == sh->qd_idx ||
4259 			    i != sh->pd_idx && i != sh->qd_idx &&
4320 			clear_bit(R5_UPTODATE, &sh->dev[sh->pd_idx].flags);
4329 			dev = &sh->dev[sh->pd_idx];
4381 					&sh->dev[sh->pd_idx].flags);
4382 				sh->ops.target = sh->pd_idx;
4402 	int pd_idx = sh->pd_idx;
4442 			clear_bit(R5_UPTODATE, &sh->dev[pd_idx].flags);
4481 			dev = &sh->dev[pd_idx];
4551 						&sh->dev[pd_idx].flags);
4552 					*target = pd_idx;
4586 		if (i != sh->pd_idx && i != sh->qd_idx) {
4619 				if (j != sh2->pd_idx &&
4986 		"pd_idx=%d, qd_idx=%d\n, check:%d, reconstruct:%d\n",
4988 	       atomic_read(&sh->count), sh->pd_idx, sh->qd_idx,
5053 		BUG_ON(!test_bit(R5_UPTODATE, &sh->dev[sh->pd_idx].flags) &&
5054 		       !test_bit(R5_Discard, &sh->dev[sh->pd_idx].flags));
5061 				(i == sh->pd_idx || i == sh->qd_idx ||
5071 				    ((i == sh->pd_idx || i == sh->qd_idx)  &&
5084 	pdev = &sh->dev[sh->pd_idx];
5085 	s.p_failed = (s.failed >= 1 && s.failed_num[0] == sh->pd_idx)
5086 		|| (s.failed >= 2 && s.failed_num[1] == sh->pd_idx);
5199 		if (test_and_clear_bit(R5_Overlap, &sh->dev[sh->pd_idx].flags))
5759 		set_bit(R5_Overlap, &sh->dev[sh->pd_idx].flags);
5765 		clear_bit(R5_Overlap, &sh->dev[sh->pd_idx].flags);
5768 			if (d == sh->pd_idx || d == sh->qd_idx)
5782 			if (d == sh->pd_idx || d == sh->qd_idx)
5835 		if (dd_idx == sh->pd_idx || dd_idx == sh->qd_idx)
5866 		if (dd_idx == sh->pd_idx || dd_idx == sh->qd_idx)
5886 		if (dd_idx == sh->pd_idx || dd_idx == sh->qd_idx)
6048 	while (dd_idx == sh.pd_idx || dd_idx == sh.qd_idx)
6362 			if (j == sh->pd_idx)