1 /*
2 * QTest testcase for the vhost-user
3 *
4 * Copyright (c) 2014 Virtual Open Systems Sarl.
5 *
6 * This work is licensed under the terms of the GNU GPL, version 2 or later.
7 * See the COPYING file in the top-level directory.
8 *
9 */
10
11 #include "qemu/osdep.h"
12
13 #include "libqtest.h"
14 #include "qapi/error.h"
15 #include "qapi/qmp/qdict.h"
16 #include "qemu/config-file.h"
17 #include "qemu/option.h"
18 #include "qemu/range.h"
19 #include "qemu/sockets.h"
20 #include "chardev/char-fe.h"
21 #include "qemu/memfd.h"
22 #include "sysemu/sysemu.h"
23 #include "libqos/libqos.h"
24 #include "libqos/pci-pc.h"
25 #include "libqos/virtio-pci.h"
26
27 #include "libqos/malloc-pc.h"
28 #include "hw/virtio/virtio-net.h"
29
30 #include <linux/vhost.h>
31 #include <linux/virtio_ids.h>
32 #include <linux/virtio_net.h>
33 #include <sys/vfs.h>
34
35
36 #define QEMU_CMD_MEM " -m %d -object memory-backend-file,id=mem,size=%dM," \
37 "mem-path=%s,share=on -numa node,memdev=mem"
38 #define QEMU_CMD_MEMFD " -m %d -object memory-backend-memfd,id=mem,size=%dM," \
39 " -numa node,memdev=mem"
40 #define QEMU_CMD_CHR " -chardev socket,id=%s,path=%s%s"
41 #define QEMU_CMD_NETDEV " -netdev vhost-user,id=net0,chardev=%s,vhostforce"
42 #define QEMU_CMD_NET " -device virtio-net-pci,netdev=net0"
43
44 #define HUGETLBFS_MAGIC 0x958458f6
45
46 /*********** FROM hw/virtio/vhost-user.c *************************************/
47
48 #define VHOST_MEMORY_MAX_NREGIONS 8
49 #define VHOST_MAX_VIRTQUEUES 0x100
50
51 #define VHOST_USER_F_PROTOCOL_FEATURES 30
52 #define VHOST_USER_PROTOCOL_F_MQ 0
53 #define VHOST_USER_PROTOCOL_F_LOG_SHMFD 1
54
55 #define VHOST_LOG_PAGE 0x1000
56
57 typedef enum VhostUserRequest {
58 VHOST_USER_NONE = 0,
59 VHOST_USER_GET_FEATURES = 1,
60 VHOST_USER_SET_FEATURES = 2,
61 VHOST_USER_SET_OWNER = 3,
62 VHOST_USER_RESET_OWNER = 4,
63 VHOST_USER_SET_MEM_TABLE = 5,
64 VHOST_USER_SET_LOG_BASE = 6,
65 VHOST_USER_SET_LOG_FD = 7,
66 VHOST_USER_SET_VRING_NUM = 8,
67 VHOST_USER_SET_VRING_ADDR = 9,
68 VHOST_USER_SET_VRING_BASE = 10,
69 VHOST_USER_GET_VRING_BASE = 11,
70 VHOST_USER_SET_VRING_KICK = 12,
71 VHOST_USER_SET_VRING_CALL = 13,
72 VHOST_USER_SET_VRING_ERR = 14,
73 VHOST_USER_GET_PROTOCOL_FEATURES = 15,
74 VHOST_USER_SET_PROTOCOL_FEATURES = 16,
75 VHOST_USER_GET_QUEUE_NUM = 17,
76 VHOST_USER_SET_VRING_ENABLE = 18,
77 VHOST_USER_MAX
78 } VhostUserRequest;
79
80 typedef struct VhostUserMemoryRegion {
81 uint64_t guest_phys_addr;
82 uint64_t memory_size;
83 uint64_t userspace_addr;
84 uint64_t mmap_offset;
85 } VhostUserMemoryRegion;
86
87 typedef struct VhostUserMemory {
88 uint32_t nregions;
89 uint32_t padding;
90 VhostUserMemoryRegion regions[VHOST_MEMORY_MAX_NREGIONS];
91 } VhostUserMemory;
92
93 typedef struct VhostUserLog {
94 uint64_t mmap_size;
95 uint64_t mmap_offset;
96 } VhostUserLog;
97
98 typedef struct VhostUserMsg {
99 VhostUserRequest request;
100
101 #define VHOST_USER_VERSION_MASK (0x3)
102 #define VHOST_USER_REPLY_MASK (0x1<<2)
103 uint32_t flags;
104 uint32_t size; /* the following payload size */
105 union {
106 #define VHOST_USER_VRING_IDX_MASK (0xff)
107 #define VHOST_USER_VRING_NOFD_MASK (0x1<<8)
108 uint64_t u64;
109 struct vhost_vring_state state;
110 struct vhost_vring_addr addr;
111 VhostUserMemory memory;
112 VhostUserLog log;
113 } payload;
114 } QEMU_PACKED VhostUserMsg;
115
116 static VhostUserMsg m __attribute__ ((unused));
117 #define VHOST_USER_HDR_SIZE (sizeof(m.request) \
118 + sizeof(m.flags) \
119 + sizeof(m.size))
120
121 #define VHOST_USER_PAYLOAD_SIZE (sizeof(m) - VHOST_USER_HDR_SIZE)
122
123 /* The version of the protocol we support */
124 #define VHOST_USER_VERSION (0x1)
125 /*****************************************************************************/
126
127 enum {
128 TEST_FLAGS_OK,
129 TEST_FLAGS_DISCONNECT,
130 TEST_FLAGS_BAD,
131 TEST_FLAGS_END,
132 };
133
134 typedef struct TestServer {
135 QPCIBus *bus;
136 QVirtioPCIDevice *dev;
137 QVirtQueue *vq[VHOST_MAX_VIRTQUEUES];
138 gchar *socket_path;
139 gchar *mig_path;
140 gchar *chr_name;
141 CharBackend chr;
142 int fds_num;
143 int fds[VHOST_MEMORY_MAX_NREGIONS];
144 VhostUserMemory memory;
145 GMutex data_mutex;
146 GCond data_cond;
147 int log_fd;
148 uint64_t rings;
149 bool test_fail;
150 int test_flags;
151 int queues;
152 QGuestAllocator *alloc;
153 } TestServer;
154
155 static TestServer *test_server_new(const gchar *name);
156 static void test_server_free(TestServer *server);
157 static void test_server_listen(TestServer *server);
158
159 static const char *tmpfs;
160 static const char *root;
161
162 enum test_memfd {
163 TEST_MEMFD_AUTO,
164 TEST_MEMFD_YES,
165 TEST_MEMFD_NO,
166 };
167
get_qemu_cmd(TestServer * s,int mem,enum test_memfd memfd,const char * mem_path,const char * chr_opts,const char * extra)168 static char *get_qemu_cmd(TestServer *s,
169 int mem, enum test_memfd memfd, const char *mem_path,
170 const char *chr_opts, const char *extra)
171 {
172 if (memfd == TEST_MEMFD_AUTO && qemu_memfd_check(0)) {
173 memfd = TEST_MEMFD_YES;
174 }
175
176 if (memfd == TEST_MEMFD_YES) {
177 return g_strdup_printf(QEMU_CMD_MEMFD QEMU_CMD_CHR
178 QEMU_CMD_NETDEV QEMU_CMD_NET "%s", mem, mem,
179 s->chr_name, s->socket_path,
180 chr_opts, s->chr_name, extra);
181 } else {
182 return g_strdup_printf(QEMU_CMD_MEM QEMU_CMD_CHR
183 QEMU_CMD_NETDEV QEMU_CMD_NET "%s", mem, mem,
184 mem_path, s->chr_name, s->socket_path,
185 chr_opts, s->chr_name, extra);
186 }
187 }
188
init_virtio_dev(TestServer * s,uint32_t features_mask)189 static void init_virtio_dev(TestServer *s, uint32_t features_mask)
190 {
191 uint32_t features;
192 int i;
193
194 s->bus = qpci_init_pc(global_qtest, NULL);
195 g_assert_nonnull(s->bus);
196
197 s->dev = qvirtio_pci_device_find(s->bus, VIRTIO_ID_NET);
198 g_assert_nonnull(s->dev);
199
200 qvirtio_pci_device_enable(s->dev);
201 qvirtio_reset(&s->dev->vdev);
202 qvirtio_set_acknowledge(&s->dev->vdev);
203 qvirtio_set_driver(&s->dev->vdev);
204
205 s->alloc = pc_alloc_init(global_qtest);
206
207 for (i = 0; i < s->queues * 2; i++) {
208 s->vq[i] = qvirtqueue_setup(&s->dev->vdev, s->alloc, i);
209 }
210
211 features = qvirtio_get_features(&s->dev->vdev);
212 features = features & features_mask;
213 qvirtio_set_features(&s->dev->vdev, features);
214
215 qvirtio_set_driver_ok(&s->dev->vdev);
216 }
217
uninit_virtio_dev(TestServer * s)218 static void uninit_virtio_dev(TestServer *s)
219 {
220 int i;
221
222 for (i = 0; i < s->queues * 2; i++) {
223 qvirtqueue_cleanup(s->dev->vdev.bus, s->vq[i], s->alloc);
224 }
225 pc_alloc_uninit(s->alloc);
226
227 qvirtio_pci_device_free(s->dev);
228 }
229
wait_for_fds(TestServer * s)230 static void wait_for_fds(TestServer *s)
231 {
232 gint64 end_time;
233
234 g_mutex_lock(&s->data_mutex);
235
236 end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
237 while (!s->fds_num) {
238 if (!g_cond_wait_until(&s->data_cond, &s->data_mutex, end_time)) {
239 /* timeout has passed */
240 g_assert(s->fds_num);
241 break;
242 }
243 }
244
245 /* check for sanity */
246 g_assert_cmpint(s->fds_num, >, 0);
247 g_assert_cmpint(s->fds_num, ==, s->memory.nregions);
248
249 g_mutex_unlock(&s->data_mutex);
250 }
251
read_guest_mem_server(TestServer * s)252 static void read_guest_mem_server(TestServer *s)
253 {
254 uint32_t *guest_mem;
255 int i, j;
256 size_t size;
257
258 wait_for_fds(s);
259
260 g_mutex_lock(&s->data_mutex);
261
262 /* iterate all regions */
263 for (i = 0; i < s->fds_num; i++) {
264
265 /* We'll check only the region statring at 0x0*/
266 if (s->memory.regions[i].guest_phys_addr != 0x0) {
267 continue;
268 }
269
270 g_assert_cmpint(s->memory.regions[i].memory_size, >, 1024);
271
272 size = s->memory.regions[i].memory_size +
273 s->memory.regions[i].mmap_offset;
274
275 guest_mem = mmap(0, size, PROT_READ | PROT_WRITE,
276 MAP_SHARED, s->fds[i], 0);
277
278 g_assert(guest_mem != MAP_FAILED);
279 guest_mem += (s->memory.regions[i].mmap_offset / sizeof(*guest_mem));
280
281 for (j = 0; j < 256; j++) {
282 uint32_t a = readl(s->memory.regions[i].guest_phys_addr + j*4);
283 uint32_t b = guest_mem[j];
284
285 g_assert_cmpint(a, ==, b);
286 }
287
288 munmap(guest_mem, s->memory.regions[i].memory_size);
289 }
290
291 g_mutex_unlock(&s->data_mutex);
292 }
293
thread_function(void * data)294 static void *thread_function(void *data)
295 {
296 GMainLoop *loop = data;
297 g_main_loop_run(loop);
298 return NULL;
299 }
300
chr_can_read(void * opaque)301 static int chr_can_read(void *opaque)
302 {
303 return VHOST_USER_HDR_SIZE;
304 }
305
chr_read(void * opaque,const uint8_t * buf,int size)306 static void chr_read(void *opaque, const uint8_t *buf, int size)
307 {
308 TestServer *s = opaque;
309 CharBackend *chr = &s->chr;
310 VhostUserMsg msg;
311 uint8_t *p = (uint8_t *) &msg;
312 int fd;
313
314 if (s->test_fail) {
315 qemu_chr_fe_disconnect(chr);
316 /* now switch to non-failure */
317 s->test_fail = false;
318 }
319
320 if (size != VHOST_USER_HDR_SIZE) {
321 g_test_message("Wrong message size received %d\n", size);
322 return;
323 }
324
325 g_mutex_lock(&s->data_mutex);
326 memcpy(p, buf, VHOST_USER_HDR_SIZE);
327
328 if (msg.size) {
329 p += VHOST_USER_HDR_SIZE;
330 size = qemu_chr_fe_read_all(chr, p, msg.size);
331 if (size != msg.size) {
332 g_test_message("Wrong message size received %d != %d\n",
333 size, msg.size);
334 return;
335 }
336 }
337
338 switch (msg.request) {
339 case VHOST_USER_GET_FEATURES:
340 /* send back features to qemu */
341 msg.flags |= VHOST_USER_REPLY_MASK;
342 msg.size = sizeof(m.payload.u64);
343 msg.payload.u64 = 0x1ULL << VHOST_F_LOG_ALL |
344 0x1ULL << VHOST_USER_F_PROTOCOL_FEATURES;
345 if (s->queues > 1) {
346 msg.payload.u64 |= 0x1ULL << VIRTIO_NET_F_MQ;
347 }
348 if (s->test_flags >= TEST_FLAGS_BAD) {
349 msg.payload.u64 = 0;
350 s->test_flags = TEST_FLAGS_END;
351 }
352 p = (uint8_t *) &msg;
353 qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
354 break;
355
356 case VHOST_USER_SET_FEATURES:
357 g_assert_cmpint(msg.payload.u64 & (0x1ULL << VHOST_USER_F_PROTOCOL_FEATURES),
358 !=, 0ULL);
359 if (s->test_flags == TEST_FLAGS_DISCONNECT) {
360 qemu_chr_fe_disconnect(chr);
361 s->test_flags = TEST_FLAGS_BAD;
362 }
363 break;
364
365 case VHOST_USER_GET_PROTOCOL_FEATURES:
366 /* send back features to qemu */
367 msg.flags |= VHOST_USER_REPLY_MASK;
368 msg.size = sizeof(m.payload.u64);
369 msg.payload.u64 = 1 << VHOST_USER_PROTOCOL_F_LOG_SHMFD;
370 if (s->queues > 1) {
371 msg.payload.u64 |= 1 << VHOST_USER_PROTOCOL_F_MQ;
372 }
373 p = (uint8_t *) &msg;
374 qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
375 break;
376
377 case VHOST_USER_GET_VRING_BASE:
378 /* send back vring base to qemu */
379 msg.flags |= VHOST_USER_REPLY_MASK;
380 msg.size = sizeof(m.payload.state);
381 msg.payload.state.num = 0;
382 p = (uint8_t *) &msg;
383 qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
384
385 assert(msg.payload.state.index < s->queues * 2);
386 s->rings &= ~(0x1ULL << msg.payload.state.index);
387 break;
388
389 case VHOST_USER_SET_MEM_TABLE:
390 /* received the mem table */
391 memcpy(&s->memory, &msg.payload.memory, sizeof(msg.payload.memory));
392 s->fds_num = qemu_chr_fe_get_msgfds(chr, s->fds,
393 G_N_ELEMENTS(s->fds));
394
395 /* signal the test that it can continue */
396 g_cond_signal(&s->data_cond);
397 break;
398
399 case VHOST_USER_SET_VRING_KICK:
400 case VHOST_USER_SET_VRING_CALL:
401 /* consume the fd */
402 qemu_chr_fe_get_msgfds(chr, &fd, 1);
403 /*
404 * This is a non-blocking eventfd.
405 * The receive function forces it to be blocking,
406 * so revert it back to non-blocking.
407 */
408 qemu_set_nonblock(fd);
409 break;
410
411 case VHOST_USER_SET_LOG_BASE:
412 if (s->log_fd != -1) {
413 close(s->log_fd);
414 s->log_fd = -1;
415 }
416 qemu_chr_fe_get_msgfds(chr, &s->log_fd, 1);
417 msg.flags |= VHOST_USER_REPLY_MASK;
418 msg.size = 0;
419 p = (uint8_t *) &msg;
420 qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE);
421
422 g_cond_signal(&s->data_cond);
423 break;
424
425 case VHOST_USER_SET_VRING_BASE:
426 assert(msg.payload.state.index < s->queues * 2);
427 s->rings |= 0x1ULL << msg.payload.state.index;
428 break;
429
430 case VHOST_USER_GET_QUEUE_NUM:
431 msg.flags |= VHOST_USER_REPLY_MASK;
432 msg.size = sizeof(m.payload.u64);
433 msg.payload.u64 = s->queues;
434 p = (uint8_t *) &msg;
435 qemu_chr_fe_write_all(chr, p, VHOST_USER_HDR_SIZE + msg.size);
436 break;
437
438 default:
439 break;
440 }
441
442 g_mutex_unlock(&s->data_mutex);
443 }
444
init_hugepagefs(const char * path)445 static const char *init_hugepagefs(const char *path)
446 {
447 struct statfs fs;
448 int ret;
449
450 if (access(path, R_OK | W_OK | X_OK)) {
451 g_test_message("access on path (%s): %s\n", path, strerror(errno));
452 return NULL;
453 }
454
455 do {
456 ret = statfs(path, &fs);
457 } while (ret != 0 && errno == EINTR);
458
459 if (ret != 0) {
460 g_test_message("statfs on path (%s): %s\n", path, strerror(errno));
461 return NULL;
462 }
463
464 if (fs.f_type != HUGETLBFS_MAGIC) {
465 g_test_message("Warning: path not on HugeTLBFS: %s\n", path);
466 return NULL;
467 }
468
469 return path;
470 }
471
test_server_new(const gchar * name)472 static TestServer *test_server_new(const gchar *name)
473 {
474 TestServer *server = g_new0(TestServer, 1);
475
476 server->socket_path = g_strdup_printf("%s/%s.sock", tmpfs, name);
477 server->mig_path = g_strdup_printf("%s/%s.mig", tmpfs, name);
478 server->chr_name = g_strdup_printf("chr-%s", name);
479
480 g_mutex_init(&server->data_mutex);
481 g_cond_init(&server->data_cond);
482
483 server->log_fd = -1;
484 server->queues = 1;
485
486 return server;
487 }
488
chr_event(void * opaque,int event)489 static void chr_event(void *opaque, int event)
490 {
491 TestServer *s = opaque;
492
493 if (s->test_flags == TEST_FLAGS_END &&
494 event == CHR_EVENT_CLOSED) {
495 s->test_flags = TEST_FLAGS_OK;
496 }
497 }
498
test_server_create_chr(TestServer * server,const gchar * opt)499 static void test_server_create_chr(TestServer *server, const gchar *opt)
500 {
501 gchar *chr_path;
502 Chardev *chr;
503
504 chr_path = g_strdup_printf("unix:%s%s", server->socket_path, opt);
505 chr = qemu_chr_new(server->chr_name, chr_path);
506 g_free(chr_path);
507
508 g_assert_nonnull(chr);
509 qemu_chr_fe_init(&server->chr, chr, &error_abort);
510 qemu_chr_fe_set_handlers(&server->chr, chr_can_read, chr_read,
511 chr_event, NULL, server, NULL, true);
512 }
513
test_server_listen(TestServer * server)514 static void test_server_listen(TestServer *server)
515 {
516 test_server_create_chr(server, ",server,nowait");
517 }
518
_test_server_free(TestServer * server)519 static gboolean _test_server_free(TestServer *server)
520 {
521 int i;
522
523 qemu_chr_fe_deinit(&server->chr, true);
524
525 for (i = 0; i < server->fds_num; i++) {
526 close(server->fds[i]);
527 }
528
529 if (server->log_fd != -1) {
530 close(server->log_fd);
531 }
532
533 unlink(server->socket_path);
534 g_free(server->socket_path);
535
536 unlink(server->mig_path);
537 g_free(server->mig_path);
538
539 g_free(server->chr_name);
540 g_assert(server->bus);
541 qpci_free_pc(server->bus);
542
543 g_free(server);
544
545 return FALSE;
546 }
547
test_server_free(TestServer * server)548 static void test_server_free(TestServer *server)
549 {
550 g_idle_add((GSourceFunc)_test_server_free, server);
551 }
552
wait_for_log_fd(TestServer * s)553 static void wait_for_log_fd(TestServer *s)
554 {
555 gint64 end_time;
556
557 g_mutex_lock(&s->data_mutex);
558 end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
559 while (s->log_fd == -1) {
560 if (!g_cond_wait_until(&s->data_cond, &s->data_mutex, end_time)) {
561 /* timeout has passed */
562 g_assert(s->log_fd != -1);
563 break;
564 }
565 }
566
567 g_mutex_unlock(&s->data_mutex);
568 }
569
write_guest_mem(TestServer * s,uint32_t seed)570 static void write_guest_mem(TestServer *s, uint32_t seed)
571 {
572 uint32_t *guest_mem;
573 int i, j;
574 size_t size;
575
576 wait_for_fds(s);
577
578 /* iterate all regions */
579 for (i = 0; i < s->fds_num; i++) {
580
581 /* We'll write only the region statring at 0x0 */
582 if (s->memory.regions[i].guest_phys_addr != 0x0) {
583 continue;
584 }
585
586 g_assert_cmpint(s->memory.regions[i].memory_size, >, 1024);
587
588 size = s->memory.regions[i].memory_size +
589 s->memory.regions[i].mmap_offset;
590
591 guest_mem = mmap(0, size, PROT_READ | PROT_WRITE,
592 MAP_SHARED, s->fds[i], 0);
593
594 g_assert(guest_mem != MAP_FAILED);
595 guest_mem += (s->memory.regions[i].mmap_offset / sizeof(*guest_mem));
596
597 for (j = 0; j < 256; j++) {
598 guest_mem[j] = seed + j;
599 }
600
601 munmap(guest_mem, s->memory.regions[i].memory_size);
602 break;
603 }
604 }
605
get_log_size(TestServer * s)606 static guint64 get_log_size(TestServer *s)
607 {
608 guint64 log_size = 0;
609 int i;
610
611 for (i = 0; i < s->memory.nregions; ++i) {
612 VhostUserMemoryRegion *reg = &s->memory.regions[i];
613 guint64 last = range_get_last(reg->guest_phys_addr,
614 reg->memory_size);
615 log_size = MAX(log_size, last / (8 * VHOST_LOG_PAGE) + 1);
616 }
617
618 return log_size;
619 }
620
621 typedef struct TestMigrateSource {
622 GSource source;
623 TestServer *src;
624 TestServer *dest;
625 } TestMigrateSource;
626
627 static gboolean
test_migrate_source_check(GSource * source)628 test_migrate_source_check(GSource *source)
629 {
630 TestMigrateSource *t = (TestMigrateSource *)source;
631 gboolean overlap = t->src->rings && t->dest->rings;
632
633 g_assert(!overlap);
634
635 return FALSE;
636 }
637
638 GSourceFuncs test_migrate_source_funcs = {
639 .check = test_migrate_source_check,
640 };
641
test_read_guest_mem(const void * arg)642 static void test_read_guest_mem(const void *arg)
643 {
644 enum test_memfd memfd = GPOINTER_TO_INT(arg);
645 TestServer *server = NULL;
646 char *qemu_cmd = NULL;
647 QTestState *s = NULL;
648
649 server = test_server_new(memfd == TEST_MEMFD_YES ?
650 "read-guest-memfd" : "read-guest-mem");
651 test_server_listen(server);
652
653 qemu_cmd = get_qemu_cmd(server, 512, memfd, root, "", "");
654
655 s = qtest_start(qemu_cmd);
656 g_free(qemu_cmd);
657
658 init_virtio_dev(server, 1u << VIRTIO_NET_F_MAC);
659
660 read_guest_mem_server(server);
661
662 uninit_virtio_dev(server);
663
664 qtest_quit(s);
665 test_server_free(server);
666 }
667
test_migrate(void)668 static void test_migrate(void)
669 {
670 TestServer *s = test_server_new("src");
671 TestServer *dest = test_server_new("dest");
672 char *uri = g_strdup_printf("%s%s", "unix:", dest->mig_path);
673 QTestState *global = global_qtest, *from, *to;
674 GSource *source;
675 gchar *cmd, *tmp;
676 QDict *rsp;
677 guint8 *log;
678 guint64 size;
679
680 test_server_listen(s);
681 test_server_listen(dest);
682
683 cmd = get_qemu_cmd(s, 2, TEST_MEMFD_AUTO, root, "", "");
684 from = qtest_start(cmd);
685 g_free(cmd);
686
687 init_virtio_dev(s, 1u << VIRTIO_NET_F_MAC);
688 init_virtio_dev(dest, 1u << VIRTIO_NET_F_MAC);
689 wait_for_fds(s);
690 size = get_log_size(s);
691 g_assert_cmpint(size, ==, (2 * 1024 * 1024) / (VHOST_LOG_PAGE * 8));
692
693 tmp = g_strdup_printf(" -incoming %s", uri);
694 cmd = get_qemu_cmd(dest, 2, TEST_MEMFD_AUTO, root, "", tmp);
695 g_free(tmp);
696 to = qtest_init(cmd);
697 g_free(cmd);
698
699 source = g_source_new(&test_migrate_source_funcs,
700 sizeof(TestMigrateSource));
701 ((TestMigrateSource *)source)->src = s;
702 ((TestMigrateSource *)source)->dest = dest;
703 g_source_attach(source, NULL);
704
705 /* slow down migration to have time to fiddle with log */
706 /* TODO: qtest could learn to break on some places */
707 rsp = qmp("{ 'execute': 'migrate_set_speed',"
708 "'arguments': { 'value': 10 } }");
709 g_assert(qdict_haskey(rsp, "return"));
710 qobject_unref(rsp);
711
712 rsp = qmp("{ 'execute': 'migrate', 'arguments': { 'uri': %s } }", uri);
713 g_assert(qdict_haskey(rsp, "return"));
714 qobject_unref(rsp);
715
716 wait_for_log_fd(s);
717
718 log = mmap(0, size, PROT_READ | PROT_WRITE, MAP_SHARED, s->log_fd, 0);
719 g_assert(log != MAP_FAILED);
720
721 /* modify first page */
722 write_guest_mem(s, 0x42);
723 log[0] = 1;
724 munmap(log, size);
725
726 /* speed things up */
727 rsp = qmp("{ 'execute': 'migrate_set_speed',"
728 "'arguments': { 'value': 0 } }");
729 g_assert(qdict_haskey(rsp, "return"));
730 qobject_unref(rsp);
731
732 qmp_eventwait("STOP");
733
734 global_qtest = to;
735 qmp_eventwait("RESUME");
736
737 read_guest_mem_server(dest);
738
739 uninit_virtio_dev(s);
740 uninit_virtio_dev(dest);
741
742 g_source_destroy(source);
743 g_source_unref(source);
744
745 qtest_quit(to);
746 test_server_free(dest);
747 qtest_quit(from);
748 test_server_free(s);
749 g_free(uri);
750
751 global_qtest = global;
752 }
753
wait_for_rings_started(TestServer * s,size_t count)754 static void wait_for_rings_started(TestServer *s, size_t count)
755 {
756 gint64 end_time;
757
758 g_mutex_lock(&s->data_mutex);
759 end_time = g_get_monotonic_time() + 5 * G_TIME_SPAN_SECOND;
760 while (ctpop64(s->rings) != count) {
761 if (!g_cond_wait_until(&s->data_cond, &s->data_mutex, end_time)) {
762 /* timeout has passed */
763 g_assert_cmpint(ctpop64(s->rings), ==, count);
764 break;
765 }
766 }
767
768 g_mutex_unlock(&s->data_mutex);
769 }
770
test_server_connect(TestServer * server)771 static inline void test_server_connect(TestServer *server)
772 {
773 test_server_create_chr(server, ",reconnect=1");
774 }
775
776 static gboolean
reconnect_cb(gpointer user_data)777 reconnect_cb(gpointer user_data)
778 {
779 TestServer *s = user_data;
780
781 qemu_chr_fe_disconnect(&s->chr);
782
783 return FALSE;
784 }
785
786 static gpointer
connect_thread(gpointer data)787 connect_thread(gpointer data)
788 {
789 TestServer *s = data;
790
791 /* wait for qemu to start before first try, to avoid extra warnings */
792 g_usleep(G_USEC_PER_SEC);
793 test_server_connect(s);
794
795 return NULL;
796 }
797
test_reconnect_subprocess(void)798 static void test_reconnect_subprocess(void)
799 {
800 TestServer *s = test_server_new("reconnect");
801 char *cmd;
802
803 g_thread_new("connect", connect_thread, s);
804 cmd = get_qemu_cmd(s, 2, TEST_MEMFD_AUTO, root, ",server", "");
805 qtest_start(cmd);
806 g_free(cmd);
807
808 init_virtio_dev(s, 1u << VIRTIO_NET_F_MAC);
809 wait_for_fds(s);
810 wait_for_rings_started(s, 2);
811
812 /* reconnect */
813 s->fds_num = 0;
814 s->rings = 0;
815 g_idle_add(reconnect_cb, s);
816 wait_for_fds(s);
817 wait_for_rings_started(s, 2);
818
819 uninit_virtio_dev(s);
820
821 qtest_end();
822 test_server_free(s);
823 return;
824 }
825
test_reconnect(void)826 static void test_reconnect(void)
827 {
828 gchar *path = g_strdup_printf("/%s/vhost-user/reconnect/subprocess",
829 qtest_get_arch());
830 g_test_trap_subprocess(path, 0, 0);
831 g_test_trap_assert_passed();
832 g_free(path);
833 }
834
test_connect_fail_subprocess(void)835 static void test_connect_fail_subprocess(void)
836 {
837 TestServer *s = test_server_new("connect-fail");
838 char *cmd;
839
840 s->test_fail = true;
841 g_thread_new("connect", connect_thread, s);
842 cmd = get_qemu_cmd(s, 2, TEST_MEMFD_AUTO, root, ",server", "");
843 qtest_start(cmd);
844 g_free(cmd);
845
846 init_virtio_dev(s, 1u << VIRTIO_NET_F_MAC);
847 wait_for_fds(s);
848 wait_for_rings_started(s, 2);
849
850 uninit_virtio_dev(s);
851
852 qtest_end();
853 test_server_free(s);
854 }
855
test_connect_fail(void)856 static void test_connect_fail(void)
857 {
858 gchar *path = g_strdup_printf("/%s/vhost-user/connect-fail/subprocess",
859 qtest_get_arch());
860 g_test_trap_subprocess(path, 0, 0);
861 g_test_trap_assert_passed();
862 g_free(path);
863 }
864
test_flags_mismatch_subprocess(void)865 static void test_flags_mismatch_subprocess(void)
866 {
867 TestServer *s = test_server_new("flags-mismatch");
868 char *cmd;
869
870 s->test_flags = TEST_FLAGS_DISCONNECT;
871 g_thread_new("connect", connect_thread, s);
872 cmd = get_qemu_cmd(s, 2, TEST_MEMFD_AUTO, root, ",server", "");
873 qtest_start(cmd);
874 g_free(cmd);
875
876 init_virtio_dev(s, 1u << VIRTIO_NET_F_MAC);
877 wait_for_fds(s);
878 wait_for_rings_started(s, 2);
879
880 uninit_virtio_dev(s);
881
882 qtest_end();
883 test_server_free(s);
884 }
885
test_flags_mismatch(void)886 static void test_flags_mismatch(void)
887 {
888 gchar *path = g_strdup_printf("/%s/vhost-user/flags-mismatch/subprocess",
889 qtest_get_arch());
890 g_test_trap_subprocess(path, 0, 0);
891 g_test_trap_assert_passed();
892 g_free(path);
893 }
894
895
test_multiqueue(void)896 static void test_multiqueue(void)
897 {
898 TestServer *s = test_server_new("mq");
899 char *cmd;
900 uint32_t features_mask = ~(QVIRTIO_F_BAD_FEATURE |
901 (1u << VIRTIO_RING_F_INDIRECT_DESC) |
902 (1u << VIRTIO_RING_F_EVENT_IDX));
903 s->queues = 2;
904 test_server_listen(s);
905
906 if (qemu_memfd_check(0)) {
907 cmd = g_strdup_printf(
908 QEMU_CMD_MEMFD QEMU_CMD_CHR QEMU_CMD_NETDEV ",queues=%d "
909 "-device virtio-net-pci,netdev=net0,mq=on,vectors=%d",
910 512, 512, s->chr_name,
911 s->socket_path, "", s->chr_name,
912 s->queues, s->queues * 2 + 2);
913 } else {
914 cmd = g_strdup_printf(
915 QEMU_CMD_MEM QEMU_CMD_CHR QEMU_CMD_NETDEV ",queues=%d "
916 "-device virtio-net-pci,netdev=net0,mq=on,vectors=%d",
917 512, 512, root, s->chr_name,
918 s->socket_path, "", s->chr_name,
919 s->queues, s->queues * 2 + 2);
920 }
921 qtest_start(cmd);
922 g_free(cmd);
923
924 init_virtio_dev(s, features_mask);
925
926 wait_for_rings_started(s, s->queues * 2);
927
928 uninit_virtio_dev(s);
929
930 qtest_end();
931
932 test_server_free(s);
933 }
934
main(int argc,char ** argv)935 int main(int argc, char **argv)
936 {
937 const char *hugefs;
938 int ret;
939 char template[] = "/tmp/vhost-test-XXXXXX";
940 GMainLoop *loop;
941 GThread *thread;
942
943 g_test_init(&argc, &argv, NULL);
944
945 module_call_init(MODULE_INIT_QOM);
946 qemu_add_opts(&qemu_chardev_opts);
947
948 tmpfs = mkdtemp(template);
949 if (!tmpfs) {
950 g_test_message("mkdtemp on path (%s): %s\n", template, strerror(errno));
951 }
952 g_assert(tmpfs);
953
954 hugefs = getenv("QTEST_HUGETLBFS_PATH");
955 if (hugefs) {
956 root = init_hugepagefs(hugefs);
957 g_assert(root);
958 } else {
959 root = tmpfs;
960 }
961
962 loop = g_main_loop_new(NULL, FALSE);
963 /* run the main loop thread so the chardev may operate */
964 thread = g_thread_new(NULL, thread_function, loop);
965
966 if (qemu_memfd_check(0)) {
967 qtest_add_data_func("/vhost-user/read-guest-mem/memfd",
968 GINT_TO_POINTER(TEST_MEMFD_YES),
969 test_read_guest_mem);
970 }
971 qtest_add_data_func("/vhost-user/read-guest-mem/memfile",
972 GINT_TO_POINTER(TEST_MEMFD_NO), test_read_guest_mem);
973 qtest_add_func("/vhost-user/migrate", test_migrate);
974 qtest_add_func("/vhost-user/multiqueue", test_multiqueue);
975
976 /* keeps failing on build-system since Aug 15 2017 */
977 if (getenv("QTEST_VHOST_USER_FIXME")) {
978 qtest_add_func("/vhost-user/reconnect/subprocess",
979 test_reconnect_subprocess);
980 qtest_add_func("/vhost-user/reconnect", test_reconnect);
981 qtest_add_func("/vhost-user/connect-fail/subprocess",
982 test_connect_fail_subprocess);
983 qtest_add_func("/vhost-user/connect-fail", test_connect_fail);
984 qtest_add_func("/vhost-user/flags-mismatch/subprocess",
985 test_flags_mismatch_subprocess);
986 qtest_add_func("/vhost-user/flags-mismatch", test_flags_mismatch);
987 }
988
989 ret = g_test_run();
990
991 /* cleanup */
992
993 /* finish the helper thread and dispatch pending sources */
994 g_main_loop_quit(loop);
995 g_thread_join(thread);
996 while (g_main_context_pending(NULL)) {
997 g_main_context_iteration (NULL, TRUE);
998 }
999 g_main_loop_unref(loop);
1000
1001 ret = rmdir(tmpfs);
1002 if (ret != 0) {
1003 g_test_message("unable to rmdir: path (%s): %s\n",
1004 tmpfs, strerror(errno));
1005 }
1006 g_assert_cmpint(ret, ==, 0);
1007
1008 return ret;
1009 }
1010