extent_map::orig_block_len contains the size of a physical stripe when
it's used to describe block groups. So get the size directly in
btrfs_rmap_block rather than open-coding the calculations. No
functional changes.
Signed-off-by: Nikolay Borisov <nborisov@xxxxxxxx>
---
fs/btrfs/block-group.c | 11 +++--------
1 file changed, 3 insertions(+), 8 deletions(-)
diff --git a/fs/btrfs/block-group.c b/fs/btrfs/block-group.c
index c3b1f304bc70..2ab4d9cb598a 100644
--- a/fs/btrfs/block-group.c
+++ b/fs/btrfs/block-group.c
@@ -1546,17 +1546,12 @@ int btrfs_rmap_block(struct btrfs_fs_info *fs_info, u64 chunk_start,
return -EIO;
map = em->map_lookup;
- data_stripe_length = em->len;
+ data_stripe_length = em->orig_block_len;
io_stripe_size = map->stripe_len;
- if (map->type & BTRFS_BLOCK_GROUP_RAID10)
- data_stripe_length = div_u64(data_stripe_length, map->num_stripes / map->sub_stripes);
- else if (map->type & BTRFS_BLOCK_GROUP_RAID0)
- data_stripe_length = div_u64(data_stripe_length, map->num_stripes);
- else if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK) {
- data_stripe_length = div_u64(data_stripe_length, nr_data_stripes(map));
+ /* For raid5/6 adjust to a full IO stripe length */
+ if (map->type & BTRFS_BLOCK_GROUP_RAID56_MASK)
io_stripe_size = map->stripe_len * nr_data_stripes(map);
- }
buf = kcalloc(map->num_stripes, sizeof(u64), GFP_NOFS);
if (!buf) {
--
2.17.1
