[PATCH 11/13] btrfs: open code set_io_stripe for RAID56

Johannes Thumshirn
2023-12-12T12:39:13Z

Open code set_io_stripe() for RAID56, as it a) uses a different method to
calculate the stripe_index and b) doesn't need to go through raid-stripe-tree
mapping code.

Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
---
fs/btrfs/volumes.c | 17 ++++++++++-------
1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 946333c8c331..7df991a81c4b 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -6670,13 +6670,16 @@ 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 {
/*

--
2.43.0