Commit 89f547c6 authored by Johannes Thumshirn's avatar Johannes Thumshirn Committed by David Sterba
Browse files

btrfs: open code set_io_stripe for RAID56 



Open code set_io_stripe() for RAID56, as it

a) uses a different method to calculate the stripe_index
b) doesn't need to go through raid-stripe-tree mapping code.

Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarJohannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent b55b3077

fs/btrfs/volumes.c

+9 −7
Original line number Diff line number Diff line
@@ -6670,13 +6670,15 @@ int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op, 
			btrfs_stripe_nr_to_offset(io_geom.stripe_nr *

						  nr_data_stripes(map));

		for (int i = 0; i < io_geom.num_stripes; i++) {

			ret = set_io_stripe(fs_info, op, logical, length,

					    &bioc->stripes[i], map,

					    (i + io_geom.stripe_nr) % io_geom.num_stripes,

					    io_geom.stripe_offset,

					    io_geom.stripe_nr);

			if (ret < 0)

				break;

			struct btrfs_io_stripe *dst = &bioc->stripes[i];

			u32 stripe_index;



			stripe_index = (i + io_geom.stripe_nr) % io_geom.num_stripes;

			dst->dev = map->stripes[stripe_index].dev;

			dst->physical =

				map->stripes[stripe_index].physical +

				io_geom.stripe_offset +

				btrfs_stripe_nr_to_offset(io_geom.stripe_nr);

		}

	} else {

		/*