1 #include "qemu/osdep.h"
2 #include <glib/gstdio.h>
3 #include <gio/gio.h>
4 #include "libqtest.h"
5 #include "qemu-common.h"
6 #include "dbus-vmstate1.h"
7 #include "migration-helpers.h"
8 
9 static char *workdir;
10 
11 typedef struct TestServerId {
12     const char *name;
13     const char *data;
14     size_t size;
15 } TestServerId;
16 
17 static const TestServerId idA = {
18     "idA", "I'am\0idA!", sizeof("I'am\0idA!")
19 };
20 
21 static const TestServerId idB = {
22     "idB", "I'am\0idB!", sizeof("I'am\0idB!")
23 };
24 
25 typedef struct TestServer {
26     const TestServerId *id;
27     bool save_called;
28     bool load_called;
29 } TestServer;
30 
31 typedef struct Test {
32     const char *id_list;
33     bool migrate_fail;
34     bool without_dst_b;
35     TestServer srcA;
36     TestServer dstA;
37     TestServer srcB;
38     TestServer dstB;
39     GMainLoop *loop;
40     QTestState *src_qemu;
41 } Test;
42 
43 static gboolean
44 vmstate_load(VMState1 *object, GDBusMethodInvocation *invocation,
45              const gchar *arg_data, gpointer user_data)
46 {
47     TestServer *h = user_data;
48     g_autoptr(GVariant) var = NULL;
49     GVariant *args;
50     const uint8_t *data;
51     size_t size;
52 
53     args = g_dbus_method_invocation_get_parameters(invocation);
54     var = g_variant_get_child_value(args, 0);
55     data = g_variant_get_fixed_array(var, &size, sizeof(char));
56     g_assert_cmpuint(size, ==, h->id->size);
57     g_assert(!memcmp(data, h->id->data, h->id->size));
58     h->load_called = true;
59 
60     g_dbus_method_invocation_return_value(invocation, g_variant_new("()"));
61     return TRUE;
62 }
63 
64 static gboolean
65 vmstate_save(VMState1 *object, GDBusMethodInvocation *invocation,
66              gpointer user_data)
67 {
68     TestServer *h = user_data;
69     GVariant *var;
70 
71     var = g_variant_new_fixed_array(G_VARIANT_TYPE_BYTE,
72                                     h->id->data, h->id->size, sizeof(char));
73     g_dbus_method_invocation_return_value(invocation,
74                                           g_variant_new("(@ay)", var));
75     h->save_called = true;
76 
77     return TRUE;
78 }
79 
80 typedef struct WaitNamed {
81     GMainLoop *loop;
82     bool named;
83 } WaitNamed;
84 
85 static void
86 named_cb(GDBusConnection *connection,
87          const gchar *name,
88          gpointer user_data)
89 {
90     WaitNamed *t = user_data;
91 
92     t->named = true;
93     g_main_loop_quit(t->loop);
94 }
95 
96 static GDBusConnection *
97 get_connection(Test *test, guint *ownid)
98 {
99     g_autofree gchar *addr = NULL;
100     WaitNamed *wait;
101     GError *err = NULL;
102     GDBusConnection *c;
103 
104     wait = g_new0(WaitNamed, 1);
105     wait->loop = test->loop;
106     addr = g_dbus_address_get_for_bus_sync(G_BUS_TYPE_SESSION, NULL, &err);
107     g_assert_no_error(err);
108 
109     c = g_dbus_connection_new_for_address_sync(
110         addr,
111         G_DBUS_CONNECTION_FLAGS_MESSAGE_BUS_CONNECTION |
112         G_DBUS_CONNECTION_FLAGS_AUTHENTICATION_CLIENT,
113         NULL, NULL, &err);
114     g_assert_no_error(err);
115     *ownid = g_bus_own_name_on_connection(c, "org.qemu.VMState1",
116                                           G_BUS_NAME_OWNER_FLAGS_NONE,
117                                           named_cb, named_cb, wait, g_free);
118     if (!wait->named) {
119         g_main_loop_run(wait->loop);
120     }
121 
122     return c;
123 }
124 
125 static GDBusObjectManagerServer *
126 get_server(GDBusConnection *conn, TestServer *s, const TestServerId *id)
127 {
128     g_autoptr(GDBusObjectSkeleton) sk = NULL;
129     g_autoptr(VMState1Skeleton) v = NULL;
130     GDBusObjectManagerServer *os;
131 
132     s->id = id;
133     os = g_dbus_object_manager_server_new("/org/qemu");
134     sk = g_dbus_object_skeleton_new("/org/qemu/VMState1");
135 
136     v = VMSTATE1_SKELETON(vmstate1_skeleton_new());
137     g_object_set(v, "id", id->name, NULL);
138 
139     g_signal_connect(v, "handle-load", G_CALLBACK(vmstate_load), s);
140     g_signal_connect(v, "handle-save", G_CALLBACK(vmstate_save), s);
141 
142     g_dbus_object_skeleton_add_interface(sk, G_DBUS_INTERFACE_SKELETON(v));
143     g_dbus_object_manager_server_export(os, sk);
144     g_dbus_object_manager_server_set_connection(os, conn);
145 
146     return os;
147 }
148 
149 static void
150 set_id_list(Test *test, QTestState *s)
151 {
152     if (!test->id_list) {
153         return;
154     }
155 
156     g_assert(!qmp_rsp_is_err(qtest_qmp(s,
157         "{ 'execute': 'qom-set', 'arguments': "
158         "{ 'path': '/objects/dv', 'property': 'id-list', 'value': %s } }",
159         test->id_list)));
160 }
161 
162 static gpointer
163 dbus_vmstate_thread(gpointer data)
164 {
165     GMainLoop *loop = data;
166 
167     g_main_loop_run(loop);
168 
169     return NULL;
170 }
171 
172 static void
173 test_dbus_vmstate(Test *test)
174 {
175     g_autofree char *src_qemu_args = NULL;
176     g_autofree char *dst_qemu_args = NULL;
177     g_autoptr(GTestDBus) srcbus = NULL;
178     g_autoptr(GTestDBus) dstbus = NULL;
179     g_autoptr(GDBusConnection) srcconnA = NULL;
180     g_autoptr(GDBusConnection) srcconnB = NULL;
181     g_autoptr(GDBusConnection) dstconnA = NULL;
182     g_autoptr(GDBusConnection) dstconnB = NULL;
183     g_autoptr(GDBusObjectManagerServer) srcserverA = NULL;
184     g_autoptr(GDBusObjectManagerServer) srcserverB = NULL;
185     g_autoptr(GDBusObjectManagerServer) dstserverA = NULL;
186     g_autoptr(GDBusObjectManagerServer) dstserverB = NULL;
187     g_auto(GStrv) srcaddr = NULL;
188     g_auto(GStrv) dstaddr = NULL;
189     g_autoptr(GThread) thread = NULL;
190     g_autoptr(GMainLoop) loop = NULL;
191     g_autofree char *uri = NULL;
192     QTestState *src_qemu = NULL, *dst_qemu = NULL;
193     guint ownsrcA, ownsrcB, owndstA, owndstB;
194 
195     uri = g_strdup_printf("unix:%s/migsocket", workdir);
196 
197     loop = g_main_loop_new(NULL, FALSE);
198     test->loop = loop;
199 
200     srcbus = g_test_dbus_new(G_TEST_DBUS_NONE);
201     g_test_dbus_up(srcbus);
202     srcconnA = get_connection(test, &ownsrcA);
203     srcserverA = get_server(srcconnA, &test->srcA, &idA);
204     srcconnB = get_connection(test, &ownsrcB);
205     srcserverB = get_server(srcconnB, &test->srcB, &idB);
206 
207     /* remove ,guid=foo part */
208     srcaddr = g_strsplit(g_test_dbus_get_bus_address(srcbus), ",", 2);
209     src_qemu_args =
210         g_strdup_printf("-object dbus-vmstate,id=dv,addr=%s", srcaddr[0]);
211 
212     dstbus = g_test_dbus_new(G_TEST_DBUS_NONE);
213     g_test_dbus_up(dstbus);
214     dstconnA = get_connection(test, &owndstA);
215     dstserverA = get_server(dstconnA, &test->dstA, &idA);
216     if (!test->without_dst_b) {
217         dstconnB = get_connection(test, &owndstB);
218         dstserverB = get_server(dstconnB, &test->dstB, &idB);
219     }
220 
221     dstaddr = g_strsplit(g_test_dbus_get_bus_address(dstbus), ",", 2);
222     dst_qemu_args =
223         g_strdup_printf("-object dbus-vmstate,id=dv,addr=%s -incoming %s",
224                         dstaddr[0], uri);
225 
226     src_qemu = qtest_init(src_qemu_args);
227     dst_qemu = qtest_init(dst_qemu_args);
228     set_id_list(test, src_qemu);
229     set_id_list(test, dst_qemu);
230 
231     thread = g_thread_new("dbus-vmstate-thread", dbus_vmstate_thread, loop);
232 
233     migrate_qmp(src_qemu, uri, "{}");
234     test->src_qemu = src_qemu;
235     if (test->migrate_fail) {
236         wait_for_migration_fail(src_qemu, true);
237         qtest_set_expected_status(dst_qemu, 1);
238     } else {
239         wait_for_migration_complete(src_qemu);
240     }
241 
242     qtest_quit(dst_qemu);
243     qtest_quit(src_qemu);
244     g_bus_unown_name(ownsrcA);
245     g_bus_unown_name(ownsrcB);
246     g_bus_unown_name(owndstA);
247     if (!test->without_dst_b) {
248         g_bus_unown_name(owndstB);
249     }
250 
251     g_main_loop_quit(test->loop);
252 }
253 
254 static void
255 check_not_migrated(TestServer *s, TestServer *d)
256 {
257     assert(!s->save_called);
258     assert(!s->load_called);
259     assert(!d->save_called);
260     assert(!d->load_called);
261 }
262 
263 static void
264 check_migrated(TestServer *s, TestServer *d)
265 {
266     assert(s->save_called);
267     assert(!s->load_called);
268     assert(!d->save_called);
269     assert(d->load_called);
270 }
271 
272 static void
273 test_dbus_vmstate_without_list(void)
274 {
275     Test test = { 0, };
276 
277     test_dbus_vmstate(&test);
278 
279     check_migrated(&test.srcA, &test.dstA);
280     check_migrated(&test.srcB, &test.dstB);
281 }
282 
283 static void
284 test_dbus_vmstate_with_list(void)
285 {
286     Test test = { .id_list = "idA,idB" };
287 
288     test_dbus_vmstate(&test);
289 
290     check_migrated(&test.srcA, &test.dstA);
291     check_migrated(&test.srcB, &test.dstB);
292 }
293 
294 static void
295 test_dbus_vmstate_only_a(void)
296 {
297     Test test = { .id_list = "idA" };
298 
299     test_dbus_vmstate(&test);
300 
301     check_migrated(&test.srcA, &test.dstA);
302     check_not_migrated(&test.srcB, &test.dstB);
303 }
304 
305 static void
306 test_dbus_vmstate_missing_src(void)
307 {
308     Test test = { .id_list = "idA,idC", .migrate_fail = true };
309 
310     /* run in subprocess to silence QEMU error reporting */
311     if (g_test_subprocess()) {
312         test_dbus_vmstate(&test);
313         check_not_migrated(&test.srcA, &test.dstA);
314         check_not_migrated(&test.srcB, &test.dstB);
315         return;
316     }
317 
318     g_test_trap_subprocess(NULL, 0, 0);
319     g_test_trap_assert_passed();
320 }
321 
322 static void
323 test_dbus_vmstate_missing_dst(void)
324 {
325     Test test = { .id_list = "idA,idB",
326                   .without_dst_b = true,
327                   .migrate_fail = true };
328 
329     /* run in subprocess to silence QEMU error reporting */
330     if (g_test_subprocess()) {
331         test_dbus_vmstate(&test);
332         assert(test.srcA.save_called);
333         assert(test.srcB.save_called);
334         assert(!test.dstB.save_called);
335         return;
336     }
337 
338     g_test_trap_subprocess(NULL, 0, 0);
339     g_test_trap_assert_passed();
340 }
341 
342 int
343 main(int argc, char **argv)
344 {
345     GError *err = NULL;
346     g_autofree char *dbus_daemon = NULL;
347     int ret;
348 
349     dbus_daemon = g_build_filename(G_STRINGIFY(SRCDIR),
350                                    "tests",
351                                    "dbus-vmstate-daemon.sh",
352                                    NULL);
353     g_setenv("G_TEST_DBUS_DAEMON", dbus_daemon, true);
354 
355     g_test_init(&argc, &argv, NULL);
356 
357     workdir = g_dir_make_tmp("dbus-vmstate-test-XXXXXX", &err);
358     if (!workdir) {
359         g_error("Unable to create temporary dir: %s\n", err->message);
360         exit(1);
361     }
362 
363     g_setenv("DBUS_VMSTATE_TEST_TMPDIR", workdir, true);
364 
365     qtest_add_func("/dbus-vmstate/without-list",
366                    test_dbus_vmstate_without_list);
367     qtest_add_func("/dbus-vmstate/with-list",
368                    test_dbus_vmstate_with_list);
369     qtest_add_func("/dbus-vmstate/only-a",
370                    test_dbus_vmstate_only_a);
371     qtest_add_func("/dbus-vmstate/missing-src",
372                    test_dbus_vmstate_missing_src);
373     qtest_add_func("/dbus-vmstate/missing-dst",
374                    test_dbus_vmstate_missing_dst);
375 
376     ret = g_test_run();
377 
378     rmdir(workdir);
379     g_free(workdir);
380 
381     return ret;
382 }
383