Signed-off-by: Anton Nefedov <anton.nefe...@virtuozzo.com>
Reviewed-by: Marc-André Lureau <marcandre.lur...@redhat.com>
---
tests/test-char.c | 71 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 71 insertions(+)
diff --git a/tests/test-char.c b/tests/test-char.c
index cc153ed..71dc28a 100644
--- a/tests/test-char.c
+++ b/tests/test-char.c
@@ -654,6 +654,76 @@ static void char_invalid_test(void)
g_assert_null(chr);
}
+static int chardev_change(void *opaque)
+{
+ return 0;
+}
+
+static int chardev_change_denied(void *opaque)
+{
+ return -1;
+}
+
+static void char_hotswap_test(void)
+{
+ char *chr_args;
+ Chardev *chr;
+ CharBackend be;
+
+ gchar *tmp_path = g_dir_make_tmp("qemu-test-char.XXXXXX", NULL);
+ char *filename = g_build_filename(tmp_path, "file", NULL);
+ ChardevFile file = { .out = filename };
+ ChardevBackend backend = { .type = CHARDEV_BACKEND_KIND_FILE,
+ .u.file.data = &file };
+ ChardevReturn *ret;
+
+ int port;
+ int sock = make_udp_socket(&port);
+ g_assert_cmpint(sock, >, 0);
+
+ chr_args = g_strdup_printf("udp:127.0.0.1:%d", port);
+
+ chr = qemu_chr_new("chardev", chr_args);
+ qemu_chr_fe_init(&be, chr, &error_abort);
+
+ /* check that chardev operates correctly */
+ char_udp_test_internal(chr, sock);
+
+ /* set the handler that denies the hotswap */
+ qemu_chr_fe_set_handlers(&be, NULL, NULL,
+ NULL, chardev_change_denied, NULL, NULL, true);
+
+ /* now, change is denied and has to keep the old backend operating */
+ ret = qmp_chardev_change("chardev", &backend, NULL);
+ g_assert(!ret);
+ g_assert(be.chr == chr);
+
+ char_udp_test_internal(chr, sock);
+
+ /* now allow the change */
+ qemu_chr_fe_set_handlers(&be, NULL, NULL,
+ NULL, chardev_change, NULL, NULL, true);
+
+ /* has to succeed now */
+ ret = qmp_chardev_change("chardev", &backend, &error_abort);
+ g_assert(be.chr != chr);
+
+ close(sock);
+ chr = be.chr;
+
+ /* run the file chardev test */
+ char_file_test_internal(chr, filename);
+
+ object_unparent(OBJECT(chr));
+
+ qapi_free_ChardevReturn(ret);
+ g_unlink(filename);
+ g_free(filename);
+ g_rmdir(tmp_path);
+ g_free(tmp_path);
+ g_free(chr_args);
+}
+
int main(int argc, char **argv)
{
qemu_init_main_loop(&error_abort);
@@ -688,6 +758,7 @@ int main(int argc, char **argv)
#ifdef HAVE_CHARDEV_SERIAL
g_test_add_func("/char/serial", char_serial_test);
#endif
+ g_test_add_func("/char/hotswap", char_hotswap_test);
return g_test_run();
}
--
2.7.4
