fuse_in
return (struct fuse_in_header*)fuse_in(fip) + 1;
struct fuse_in_header *ihd = fuse_in(fip); \
error = uiomove(fuse_in(fip), fuse_in_size(fip), uio);
ihd = fuse_in(fip);
fuse_fill_in_header(fuse_in(fip), fuse_in_size(fip), op, fip->unique,