PNFS_BLOCK_EXTENT_SIZE
return sizeof(__be32) + PNFS_BLOCK_EXTENT_SIZE * count;
PNFS_BLOCK_EXTENT_SIZE)
PNFS_BLOCK_LAYOUT4_SIZE) / PNFS_BLOCK_EXTENT_SIZE;
expected = sizeof(__be32) + nr_iomaps * PNFS_BLOCK_EXTENT_SIZE;
u32 i, len = sizeof(__be32) + bl->nr_extents * PNFS_BLOCK_EXTENT_SIZE;