tests: extend scm cycle breaking tests
Add a test with file ref dependency, which is actually checks that the
files are removed and put.
Link:
@@ -131,12 +131,84 @@ static int test_iowq_request_cancel(void)
ret = read(fds[0], buffer, 10);
if (ret < 0)
perror("read");
+ close(fds[0]);
+ return 0;
+}
+
+static int test_scm_cycles(bool update)
+{
+ char buffer[128];
+ struct io_uring ring;
+ int i, ret;
+ int sp[2], fds[2], reg_fds[4];
+
+ if (socketpair(AF_UNIX, SOCK_DGRAM, 0, sp) != 0) {
+ perror("Failed to create Unix-domain socket pair\n");
+ return 1;
+ }
+ ret = io_uring_queue_init(8, &ring, 0);
+ if (ret < 0) {
+ fprintf(stderr, "failed to init io_uring: %s\n", strerror(-ret));
+ return ret;
+ }
+ if (pipe(fds)) {
+ perror("pipe");
+ return -1;
+ }
+ send_fd(sp[0], ring.ring_fd);
+
+ /* register an empty set for updates */
+ if (update) {
+ for (i = 0; i < 4; i++)
+ reg_fds[i] = -1;
+ ret = io_uring_register_files(&ring, reg_fds, 4);
+ if (ret) {
+ fprintf(stderr, "file_register: %d\n", ret);
+ return ret;
+ }
+ }
+
+ reg_fds[0] = fds[0];
+ reg_fds[1] = fds[1];
+ reg_fds[2] = sp[0];
+ reg_fds[3] = sp[1];
+ if (update) {
+ ret = io_uring_register_files_update(&ring, 0, reg_fds, 4);
+ if (ret != 4) {
+ fprintf(stderr, "file_register: %d\n", ret);
+ return ret;
+ }
+ } else {
+ ret = io_uring_register_files(&ring, reg_fds, 4);
+ if (ret) {
+ fprintf(stderr, "file_register: %d\n", ret);
+ return ret;
+ }
+ }
+
+ close(fds[1]);
+ close(sp[0]);
+ close(sp[1]);
+
+ /* should unregister files and close the write fd */
+ io_uring_queue_exit(&ring);
+
+ /*
+ * We're trying to wait for the ring to "really" exit, that will be
+ * done async. For that rely on the registered write end to be closed
+ * after ring quiesce, so failing read from the other pipe end.
+ */
+ ret = read(fds[0], buffer, 10);
+ if (ret < 0)
+ perror("read");
+ close(fds[0]);
return 0;
}
int main(int argc, char *argv[])
{
int sp[2], pid, ring_fd, ret;
+ int i;
if (argc > 1)
return 0;
@@ -147,6 +219,18 @@ int main(int argc, char *argv[])
return 1;
}
+ for (i = 0; i < 2; i++) {
+ bool update = !!(i & 1);
+
+ ret = test_scm_cycles(update);
+ if (ret) {
+ fprintf(stderr, "test_scm_cycles() failed %i\n",
+ update);
+ return 1;
+ }
+ break;
+ }
+
if (socketpair(AF_UNIX, SOCK_DGRAM, 0, sp) != 0) {
perror("Failed to create Unix-domain socket pair\n");
return 1;
