stripe_length
unsigned int nr_sectors = stripe_length(stripe) >> fs_info->sectorsize_bits;
unsigned int nr_sectors = stripe_length(stripe) >> fs_info->sectorsize_bits;
sctx->stat.last_physical = stripe->physical + stripe_length(stripe);
u64 stripe_length;
stripe_length = btrfs_chunk_length(leaf, chunk);
stripe_length = div_u64(stripe_length, factor);
stripe_offset + stripe_length > bargs->pstart)