F_FORBID_OPEN
F_FORBID_OPEN | F_FORBID_XATTR, &req->lr_fid);
F_REQUIRE_DIR | F_FORBID_OPEN, &req->lr_fid);
F_REQUIRE_DIR | F_FORBID_OPEN, &req->lr_fid);
F_REQUIRE_DIR | F_FORBID_OPEN, &req->lr_fid);
F_REQUIRE_DIR | F_FORBID_OPEN, &req->lr_fid2);
F_FORBID_DIR | F_FORBID_OPEN, &req->lr_fid);
F_FORBID_XATTR | F_FORBID_OPEN, &fid);
F_REQUIRE_DIR | F_FORBID_OPEN, &req->lr_fid2);
F_REQUIRE_DIR | F_FORBID_OPEN, &req->lr_fid);
if ((flags & F_FORBID_OPEN) && l9p_fid_isopen(file))
F_REQUIRE_DIR | F_FORBID_OPEN, &req->lr_fid);
F_FORBID_OPEN | F_FORBID_XATTR, &req->lr_fid);