diff options
Diffstat (limited to 'fs/btrfs/volumes.c')
| -rw-r--r-- | fs/btrfs/volumes.c | 20 |
1 files changed, 7 insertions, 13 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 6ab1b71a5df0..ba1e7f1b9a72 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -6313,7 +6313,7 @@ int btrfs_get_io_geometry(struct btrfs_fs_info *fs_info, struct extent_map *em, u64 offset; u64 stripe_offset; u64 stripe_nr; - u64 stripe_len; + u32 stripe_len; u64 raid56_full_stripe_start = (u64)-1; int data_stripes; @@ -6324,19 +6324,13 @@ int btrfs_get_io_geometry(struct btrfs_fs_info *fs_info, struct extent_map *em, offset = logical - em->start; /* Len of a stripe in a chunk */ stripe_len = map->stripe_len; - /* Stripe where this block falls in */ - stripe_nr = div64_u64(offset, stripe_len); - /* Offset of stripe in the chunk */ - stripe_offset = stripe_nr * stripe_len; - if (offset < stripe_offset) { - btrfs_crit(fs_info, -"stripe math has gone wrong, stripe_offset=%llu offset=%llu start=%llu logical=%llu stripe_len=%llu", - stripe_offset, offset, em->start, logical, stripe_len); - return -EINVAL; - } + /* + * Stripe_nr is where this block falls in + * stripe_offset is the offset of this block in its stripe. + */ + stripe_nr = div64_u64_rem(offset, stripe_len, &stripe_offset); + ASSERT(stripe_offset < U32_MAX); - /* stripe_offset is the offset of this block in its stripe */ - stripe_offset = offset - stripe_offset; data_stripes = nr_data_stripes(map); /* Only stripe based profiles needs to check against stripe length. */ |