74 struct comm_pipes {  struct
79 static int setup_comm_pipes(struct comm_pipes *comm_pipes)  in setup_comm_pipes()  argument
81 	if (pipe(comm_pipes->child_ready) < 0)  in setup_comm_pipes()
83 	if (pipe(comm_pipes->parent_ready) < 0) {  in setup_comm_pipes()
84 		close(comm_pipes->child_ready[0]);  in setup_comm_pipes()
85 		close(comm_pipes->child_ready[1]);  in setup_comm_pipes()
92 static void close_comm_pipes(struct comm_pipes *comm_pipes)  in close_comm_pipes()  argument
94 	close(comm_pipes->child_ready[0]);  in close_comm_pipes()
95 	close(comm_pipes->child_ready[1]);  in close_comm_pipes()
96 	close(comm_pipes->parent_ready[0]);  in close_comm_pipes()
97 	close(comm_pipes->parent_ready[1]);  in close_comm_pipes()
101 			   struct comm_pipes *comm_pipes)  in child_memcmp_fn()  argument
110 	write(comm_pipes->child_ready[1], "0", 1);  in child_memcmp_fn()
111 	while (read(comm_pipes->parent_ready[0], &buf, 1) != 1)  in child_memcmp_fn()
119 				    struct comm_pipes *comm_pipes)  in child_vmsplice_memcmp_fn()  argument
151 	write(comm_pipes->child_ready[1], "0", 1);  in child_vmsplice_memcmp_fn()
152 	while (read(comm_pipes->parent_ready[0], &buf, 1) != 1)  in child_vmsplice_memcmp_fn()
165 typedef int (*child_fn)(char *mem, size_t size, struct comm_pipes *comm_pipes);
170 	struct comm_pipes comm_pipes;  in do_test_cow_in_parent()  local
174 	ret = setup_comm_pipes(&comm_pipes);  in do_test_cow_in_parent()
185 		exit(fn(mem, size, &comm_pipes));  in do_test_cow_in_parent()
188 	while (read(comm_pipes.child_ready[0], &buf, 1) != 1)  in do_test_cow_in_parent()
200 			write(comm_pipes.parent_ready[1], "0", 1);  in do_test_cow_in_parent()
208 	write(comm_pipes.parent_ready[1], "0", 1);  in do_test_cow_in_parent()
218 	close_comm_pipes(&comm_pipes);  in do_test_cow_in_parent()
249 	struct comm_pipes comm_pipes;  in do_test_vmsplice_in_parent()  local
259 	ret = setup_comm_pipes(&comm_pipes);  in do_test_vmsplice_in_parent()
283 		write(comm_pipes.child_ready[1], "0", 1);  in do_test_vmsplice_in_parent()
284 		while (read(comm_pipes.parent_ready[0], &buf, 1) != 1)  in do_test_vmsplice_in_parent()
300 	while (read(comm_pipes.child_ready[0], &buf, 1) != 1)  in do_test_vmsplice_in_parent()
306 	write(comm_pipes.parent_ready[1], "0", 1);  in do_test_vmsplice_in_parent()
330 	close_comm_pipes(&comm_pipes);  in do_test_vmsplice_in_parent()
349 	struct comm_pipes comm_pipes;  in do_test_iouring()  local
359 	ret = setup_comm_pipes(&comm_pipes);  in do_test_iouring()
411 			write(comm_pipes.child_ready[1], "0", 1);  in do_test_iouring()
412 			while (read(comm_pipes.parent_ready[0], &buf, 1) != 1)  in do_test_iouring()
417 		while (read(comm_pipes.child_ready[0], &buf, 1) != 1)  in do_test_iouring()
483 		write(comm_pipes.parent_ready[1], "0", 1);  in do_test_iouring()
495 	close_comm_pipes(&comm_pipes);  in do_test_iouring()
521 	struct comm_pipes comm_pipes;  in do_test_ro_pin()  local
537 	ret = setup_comm_pipes(&comm_pipes);  in do_test_ro_pin()
557 			write(comm_pipes.child_ready[1], "0", 1);  in do_test_ro_pin()
558 			while (read(comm_pipes.parent_ready[0], &buf, 1) != 1)  in do_test_ro_pin()
564 		while (read(comm_pipes.child_ready[0], &buf, 1) != 1)  in do_test_ro_pin()
573 			write(comm_pipes.parent_ready[1], "0", 1);  in do_test_ro_pin()
633 		write(comm_pipes.parent_ready[1], "0", 1);  in do_test_ro_pin()
642 	close_comm_pipes(&comm_pipes);  in do_test_ro_pin()
1138 	struct comm_pipes comm_pipes;  in do_test_anon_thp_collapse()  local
1142 	ret = setup_comm_pipes(&comm_pipes);  in do_test_anon_thp_collapse()
1204 			exit(child_memcmp_fn(mem, size, &comm_pipes));  in do_test_anon_thp_collapse()
1207 			exit(child_memcmp_fn(mem, size / 2, &comm_pipes));  in do_test_anon_thp_collapse()
1211 					     &comm_pipes));  in do_test_anon_thp_collapse()
1218 	while (read(comm_pipes.child_ready[0], &buf, 1) != 1)  in do_test_anon_thp_collapse()
1233 			write(comm_pipes.parent_ready[1], "0", 1);  in do_test_anon_thp_collapse()
1244 			write(comm_pipes.parent_ready[1], "0", 1);  in do_test_anon_thp_collapse()
1255 	write(comm_pipes.parent_ready[1], "0", 1);  in do_test_anon_thp_collapse()
1265 	close_comm_pipes(&comm_pipes);  in do_test_anon_thp_collapse()