Commit de483734 authored by Anand Jain's avatar Anand Jain Committed by David Sterba
Browse files

btrfs: use need_full_stripe() in __btrfs_map_block() 



A cleanup patch, use need_full_stripe() to replace the open code.

Signed-off-by: default avatarAnand Jain <anand.jain@oracle.com>
Reviewed-by: default avatarQu Wenruo <quwenruo.btrfs@gmx.com>
Reviewed-by: default avatarNikolay Borisov <nborisov@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 79f015f2

fs/btrfs/volumes.c

+6 −10
Original line number Diff line number Diff line
@@ -5691,10 +5691,10 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, 
	if (map->type & BTRFS_BLOCK_GROUP_RAID0) {

		stripe_nr = div_u64_rem(stripe_nr, map->num_stripes,

				&stripe_index);

		if (op != BTRFS_MAP_WRITE && op != BTRFS_MAP_GET_READ_MIRRORS)

		if (!need_full_stripe(op))

			mirror_num = 1;

	} else if (map->type & BTRFS_BLOCK_GROUP_RAID1) {

		if (op == BTRFS_MAP_WRITE || op == BTRFS_MAP_GET_READ_MIRRORS)

		if (need_full_stripe(op))

			num_stripes = map->num_stripes;

		else if (mirror_num)

			stripe_index = mirror_num - 1;
@@ -5707,7 +5707,7 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, 
		}



	} else if (map->type & BTRFS_BLOCK_GROUP_DUP) {

		if (op == BTRFS_MAP_WRITE || op == BTRFS_MAP_GET_READ_MIRRORS) {

		if (need_full_stripe(op)) {

			num_stripes = map->num_stripes;

		} else if (mirror_num) {

			stripe_index = mirror_num - 1;
@@ -5721,7 +5721,7 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, 
		stripe_nr = div_u64_rem(stripe_nr, factor, &stripe_index);

		stripe_index *= map->sub_stripes;



		if (op == BTRFS_MAP_WRITE || op == BTRFS_MAP_GET_READ_MIRRORS)

		if (need_full_stripe(op))

			num_stripes = map->sub_stripes;

		else if (mirror_num)

			stripe_index += mirror_num - 1;
@@ -5736,9 +5736,7 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, 
		}



	} else if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK) {

		if (need_raid_map &&

		    (op == BTRFS_MAP_WRITE || op == BTRFS_MAP_GET_READ_MIRRORS ||

		     mirror_num > 1)) {

		if (need_raid_map && (need_full_stripe(op) || mirror_num > 1)) {

			/* push stripe_nr back to the start of the full stripe */

			stripe_nr = div64_u64(raid56_full_stripe_start,

					stripe_len * nr_data_stripes(map));
@@ -5765,9 +5763,7 @@ static int __btrfs_map_block(struct btrfs_fs_info *fs_info, 
			/* We distribute the parity blocks across stripes */

			div_u64_rem(stripe_nr + stripe_index, map->num_stripes,

					&stripe_index);

			if ((op != BTRFS_MAP_WRITE &&

			     op != BTRFS_MAP_GET_READ_MIRRORS) &&

			    mirror_num <= 1)

			if (!need_full_stripe(op) && mirror_num <= 1)

				mirror_num = 1;

		}

	} else {

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