1 /* 2 * QTest testcase for VirtIO 9P 3 * 4 * Copyright (c) 2014 SUSE LINUX Products GmbH 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 #include "qemu/osdep.h" 11 #include "libqtest.h" 12 #include "qemu-common.h" 13 #include "libqos/libqos-pc.h" 14 #include "libqos/libqos-spapr.h" 15 #include "libqos/virtio.h" 16 #include "libqos/virtio-pci.h" 17 #include "standard-headers/linux/virtio_ids.h" 18 #include "standard-headers/linux/virtio_pci.h" 19 #include "hw/9pfs/9p.h" 20 21 static const char mount_tag[] = "qtest"; 22 23 typedef struct { 24 QVirtioDevice *dev; 25 QOSState *qs; 26 QVirtQueue *vq; 27 char *test_share; 28 uint16_t p9_req_tag; 29 } QVirtIO9P; 30 31 static QVirtIO9P *qvirtio_9p_start(const char *driver) 32 { 33 const char *arch = qtest_get_arch(); 34 const char *cmd = "-fsdev local,id=fsdev0,security_model=none,path=%s " 35 "-device %s,fsdev=fsdev0,mount_tag=%s"; 36 QVirtIO9P *v9p = g_new0(QVirtIO9P, 1); 37 38 v9p->test_share = g_strdup("/tmp/qtest.XXXXXX"); 39 g_assert_nonnull(mkdtemp(v9p->test_share)); 40 41 if (strcmp(arch, "i386") == 0 || strcmp(arch, "x86_64") == 0) { 42 v9p->qs = qtest_pc_boot(cmd, v9p->test_share, driver, mount_tag); 43 } else if (strcmp(arch, "ppc64") == 0) { 44 v9p->qs = qtest_spapr_boot(cmd, v9p->test_share, driver, mount_tag); 45 } else { 46 g_printerr("virtio-9p tests are only available on x86 or ppc64\n"); 47 exit(EXIT_FAILURE); 48 } 49 50 return v9p; 51 } 52 53 static void qvirtio_9p_stop(QVirtIO9P *v9p) 54 { 55 qtest_shutdown(v9p->qs); 56 rmdir(v9p->test_share); 57 g_free(v9p->test_share); 58 g_free(v9p); 59 } 60 61 static QVirtIO9P *qvirtio_9p_pci_start(void) 62 { 63 QVirtIO9P *v9p = qvirtio_9p_start("virtio-9p-pci"); 64 QVirtioPCIDevice *dev = qvirtio_pci_device_find(v9p->qs->pcibus, 65 VIRTIO_ID_9P); 66 g_assert_nonnull(dev); 67 g_assert_cmphex(dev->vdev.device_type, ==, VIRTIO_ID_9P); 68 v9p->dev = (QVirtioDevice *) dev; 69 70 qvirtio_pci_device_enable(dev); 71 qvirtio_reset(v9p->dev); 72 qvirtio_set_acknowledge(v9p->dev); 73 qvirtio_set_driver(v9p->dev); 74 75 v9p->vq = qvirtqueue_setup(v9p->dev, v9p->qs->alloc, 0); 76 return v9p; 77 } 78 79 static void qvirtio_9p_pci_stop(QVirtIO9P *v9p) 80 { 81 qvirtqueue_cleanup(v9p->dev->bus, v9p->vq, v9p->qs->alloc); 82 qvirtio_pci_device_disable(container_of(v9p->dev, QVirtioPCIDevice, vdev)); 83 g_free(v9p->dev); 84 qvirtio_9p_stop(v9p); 85 } 86 87 static void pci_config(QVirtIO9P *v9p) 88 { 89 size_t tag_len = qvirtio_config_readw(v9p->dev, 0); 90 char *tag; 91 int i; 92 93 g_assert_cmpint(tag_len, ==, strlen(mount_tag)); 94 95 tag = g_malloc(tag_len); 96 for (i = 0; i < tag_len; i++) { 97 tag[i] = qvirtio_config_readb(v9p->dev, i + 2); 98 } 99 g_assert_cmpmem(tag, tag_len, mount_tag, tag_len); 100 g_free(tag); 101 } 102 103 #define P9_MAX_SIZE 4096 /* Max size of a T-message or R-message */ 104 105 typedef struct { 106 QVirtIO9P *v9p; 107 uint16_t tag; 108 uint64_t t_msg; 109 uint32_t t_size; 110 uint64_t r_msg; 111 /* No r_size, it is hardcoded to P9_MAX_SIZE */ 112 size_t t_off; 113 size_t r_off; 114 } P9Req; 115 116 static void v9fs_memwrite(P9Req *req, const void *addr, size_t len) 117 { 118 memwrite(req->t_msg + req->t_off, addr, len); 119 req->t_off += len; 120 } 121 122 static void v9fs_memskip(P9Req *req, size_t len) 123 { 124 req->r_off += len; 125 } 126 127 static void v9fs_memrewind(P9Req *req, size_t len) 128 { 129 req->r_off -= len; 130 } 131 132 static void v9fs_memread(P9Req *req, void *addr, size_t len) 133 { 134 memread(req->r_msg + req->r_off, addr, len); 135 req->r_off += len; 136 } 137 138 static void v9fs_uint16_write(P9Req *req, uint16_t val) 139 { 140 uint16_t le_val = cpu_to_le16(val); 141 142 v9fs_memwrite(req, &le_val, 2); 143 } 144 145 static void v9fs_uint16_read(P9Req *req, uint16_t *val) 146 { 147 v9fs_memread(req, val, 2); 148 le16_to_cpus(val); 149 } 150 151 static void v9fs_uint32_write(P9Req *req, uint32_t val) 152 { 153 uint32_t le_val = cpu_to_le32(val); 154 155 v9fs_memwrite(req, &le_val, 4); 156 } 157 158 static void v9fs_uint32_read(P9Req *req, uint32_t *val) 159 { 160 v9fs_memread(req, val, 4); 161 le32_to_cpus(val); 162 } 163 164 /* len[2] string[len] */ 165 static uint16_t v9fs_string_size(const char *string) 166 { 167 size_t len = strlen(string); 168 169 g_assert_cmpint(len, <=, UINT16_MAX); 170 171 return 2 + len; 172 } 173 174 static void v9fs_string_write(P9Req *req, const char *string) 175 { 176 int len = strlen(string); 177 178 g_assert_cmpint(len, <=, UINT16_MAX); 179 180 v9fs_uint16_write(req, (uint16_t) len); 181 v9fs_memwrite(req, string, len); 182 } 183 184 static void v9fs_string_read(P9Req *req, uint16_t *len, char **string) 185 { 186 uint16_t local_len; 187 188 v9fs_uint16_read(req, &local_len); 189 if (len) { 190 *len = local_len; 191 } 192 if (string) { 193 *string = g_malloc(local_len); 194 v9fs_memread(req, *string, local_len); 195 } else { 196 v9fs_memskip(req, local_len); 197 } 198 } 199 200 typedef struct { 201 uint32_t size; 202 uint8_t id; 203 uint16_t tag; 204 } QEMU_PACKED P9Hdr; 205 206 static P9Req *v9fs_req_init(QVirtIO9P *v9p, uint32_t size, uint8_t id, 207 uint16_t tag) 208 { 209 P9Req *req = g_new0(P9Req, 1); 210 uint32_t t_size = 7 + size; /* 9P header has well-known size of 7 bytes */ 211 P9Hdr hdr = { 212 .size = cpu_to_le32(t_size), 213 .id = id, 214 .tag = cpu_to_le16(tag) 215 }; 216 217 g_assert_cmpint(t_size, <=, P9_MAX_SIZE); 218 219 req->v9p = v9p; 220 req->t_size = t_size; 221 req->t_msg = guest_alloc(v9p->qs->alloc, req->t_size); 222 v9fs_memwrite(req, &hdr, 7); 223 req->tag = tag; 224 return req; 225 } 226 227 static void v9fs_req_send(P9Req *req) 228 { 229 QVirtIO9P *v9p = req->v9p; 230 uint32_t free_head; 231 232 req->r_msg = guest_alloc(v9p->qs->alloc, P9_MAX_SIZE); 233 free_head = qvirtqueue_add(v9p->vq, req->t_msg, req->t_size, false, true); 234 qvirtqueue_add(v9p->vq, req->r_msg, P9_MAX_SIZE, true, false); 235 qvirtqueue_kick(v9p->dev, v9p->vq, free_head); 236 req->t_off = 0; 237 } 238 239 static void v9fs_req_recv(P9Req *req, uint8_t id) 240 { 241 QVirtIO9P *v9p = req->v9p; 242 P9Hdr hdr; 243 int i; 244 245 for (i = 0; i < 10; i++) { 246 qvirtio_wait_queue_isr(v9p->dev, v9p->vq, 1000 * 1000); 247 248 v9fs_memread(req, &hdr, 7); 249 le32_to_cpus(&hdr.size); 250 le16_to_cpus(&hdr.tag); 251 if (hdr.size >= 7) { 252 break; 253 } 254 v9fs_memrewind(req, 7); 255 } 256 257 g_assert_cmpint(hdr.size, >=, 7); 258 g_assert_cmpint(hdr.size, <=, P9_MAX_SIZE); 259 g_assert_cmpint(hdr.tag, ==, req->tag); 260 261 if (hdr.id != id && hdr.id == P9_RLERROR) { 262 uint32_t err; 263 v9fs_uint32_read(req, &err); 264 g_printerr("Received Rlerror (%d) instead of Response %d\n", err, id); 265 g_assert_not_reached(); 266 } 267 g_assert_cmpint(hdr.id, ==, id); 268 } 269 270 static void v9fs_req_free(P9Req *req) 271 { 272 QVirtIO9P *v9p = req->v9p; 273 274 guest_free(v9p->qs->alloc, req->t_msg); 275 guest_free(v9p->qs->alloc, req->r_msg); 276 g_free(req); 277 } 278 279 /* size[4] Rlerror tag[2] ecode[4] */ 280 static void v9fs_rlerror(P9Req *req, uint32_t *err) 281 { 282 v9fs_req_recv(req, P9_RLERROR); 283 v9fs_uint32_read(req, err); 284 v9fs_req_free(req); 285 } 286 287 /* size[4] Tversion tag[2] msize[4] version[s] */ 288 static P9Req *v9fs_tversion(QVirtIO9P *v9p, uint32_t msize, const char *version) 289 { 290 P9Req *req = v9fs_req_init(v9p, 4 + v9fs_string_size(version), P9_TVERSION, 291 P9_NOTAG); 292 293 v9fs_uint32_write(req, msize); 294 v9fs_string_write(req, version); 295 v9fs_req_send(req); 296 return req; 297 } 298 299 /* size[4] Rversion tag[2] msize[4] version[s] */ 300 static void v9fs_rversion(P9Req *req, uint16_t *len, char **version) 301 { 302 uint32_t msize; 303 304 v9fs_req_recv(req, P9_RVERSION); 305 v9fs_uint32_read(req, &msize); 306 307 g_assert_cmpint(msize, ==, P9_MAX_SIZE); 308 309 if (len || version) { 310 v9fs_string_read(req, len, version); 311 } 312 313 v9fs_req_free(req); 314 } 315 316 /* size[4] Tattach tag[2] fid[4] afid[4] uname[s] aname[s] n_uname[4] */ 317 static P9Req *v9fs_tattach(QVirtIO9P *v9p, uint32_t fid, uint32_t n_uname) 318 { 319 const char *uname = ""; /* ignored by QEMU */ 320 const char *aname = ""; /* ignored by QEMU */ 321 P9Req *req = v9fs_req_init(v9p, 4 + 4 + 2 + 2 + 4, P9_TATTACH, 322 ++(v9p->p9_req_tag)); 323 324 v9fs_uint32_write(req, fid); 325 v9fs_uint32_write(req, P9_NOFID); 326 v9fs_string_write(req, uname); 327 v9fs_string_write(req, aname); 328 v9fs_uint32_write(req, n_uname); 329 v9fs_req_send(req); 330 return req; 331 } 332 333 typedef char v9fs_qid[13]; 334 335 /* size[4] Rattach tag[2] qid[13] */ 336 static void v9fs_rattach(P9Req *req, v9fs_qid *qid) 337 { 338 v9fs_req_recv(req, P9_RATTACH); 339 if (qid) { 340 v9fs_memread(req, qid, 13); 341 } 342 v9fs_req_free(req); 343 } 344 345 /* size[4] Twalk tag[2] fid[4] newfid[4] nwname[2] nwname*(wname[s]) */ 346 static P9Req *v9fs_twalk(QVirtIO9P *v9p, uint32_t fid, uint32_t newfid, 347 uint16_t nwname, char *const wnames[]) 348 { 349 P9Req *req; 350 int i; 351 uint32_t size = 4 + 4 + 2; 352 353 for (i = 0; i < nwname; i++) { 354 size += v9fs_string_size(wnames[i]); 355 } 356 req = v9fs_req_init(v9p, size, P9_TWALK, ++(v9p->p9_req_tag)); 357 v9fs_uint32_write(req, fid); 358 v9fs_uint32_write(req, newfid); 359 v9fs_uint16_write(req, nwname); 360 for (i = 0; i < nwname; i++) { 361 v9fs_string_write(req, wnames[i]); 362 } 363 v9fs_req_send(req); 364 return req; 365 } 366 367 /* size[4] Rwalk tag[2] nwqid[2] nwqid*(wqid[13]) */ 368 static void v9fs_rwalk(P9Req *req, uint16_t *nwqid, v9fs_qid **wqid) 369 { 370 uint16_t local_nwqid; 371 372 v9fs_req_recv(req, P9_RWALK); 373 v9fs_uint16_read(req, &local_nwqid); 374 if (nwqid) { 375 *nwqid = local_nwqid; 376 } 377 if (wqid) { 378 *wqid = g_malloc(local_nwqid * 13); 379 v9fs_memread(req, *wqid, local_nwqid * 13); 380 } 381 v9fs_req_free(req); 382 } 383 384 static void fs_version(QVirtIO9P *v9p) 385 { 386 const char *version = "9P2000.L"; 387 uint16_t server_len; 388 char *server_version; 389 P9Req *req; 390 391 req = v9fs_tversion(v9p, P9_MAX_SIZE, version); 392 v9fs_rversion(req, &server_len, &server_version); 393 394 g_assert_cmpmem(server_version, server_len, version, strlen(version)); 395 396 g_free(server_version); 397 } 398 399 static void fs_attach(QVirtIO9P *v9p) 400 { 401 P9Req *req; 402 403 fs_version(v9p); 404 req = v9fs_tattach(v9p, 0, getuid()); 405 v9fs_rattach(req, NULL); 406 } 407 408 static void fs_walk(QVirtIO9P *v9p) 409 { 410 char *wnames[P9_MAXWELEM], *paths[P9_MAXWELEM]; 411 char *last_path = v9p->test_share; 412 uint16_t nwqid; 413 v9fs_qid *wqid; 414 int i; 415 P9Req *req; 416 417 for (i = 0; i < P9_MAXWELEM; i++) { 418 wnames[i] = g_strdup_printf("%s%d", __func__, i); 419 last_path = paths[i] = g_strdup_printf("%s/%s", last_path, wnames[i]); 420 g_assert(!mkdir(paths[i], 0700)); 421 } 422 423 fs_attach(v9p); 424 req = v9fs_twalk(v9p, 0, 1, P9_MAXWELEM, wnames); 425 v9fs_rwalk(req, &nwqid, &wqid); 426 427 g_assert_cmpint(nwqid, ==, P9_MAXWELEM); 428 429 for (i = 0; i < P9_MAXWELEM; i++) { 430 rmdir(paths[P9_MAXWELEM - i - 1]); 431 g_free(paths[P9_MAXWELEM - i - 1]); 432 g_free(wnames[i]); 433 } 434 435 g_free(wqid); 436 } 437 438 static void fs_walk_no_slash(QVirtIO9P *v9p) 439 { 440 char *const wnames[] = { g_strdup(" /") }; 441 P9Req *req; 442 uint32_t err; 443 444 fs_attach(v9p); 445 req = v9fs_twalk(v9p, 0, 1, 1, wnames); 446 v9fs_rlerror(req, &err); 447 448 g_assert_cmpint(err, ==, ENOENT); 449 450 g_free(wnames[0]); 451 } 452 453 typedef void (*v9fs_test_fn)(QVirtIO9P *v9p); 454 455 static void v9fs_run_pci_test(gconstpointer data) 456 { 457 v9fs_test_fn fn = data; 458 QVirtIO9P *v9p = qvirtio_9p_pci_start(); 459 460 if (fn) { 461 fn(v9p); 462 } 463 qvirtio_9p_pci_stop(v9p); 464 } 465 466 static void v9fs_qtest_pci_add(const char *path, v9fs_test_fn fn) 467 { 468 qtest_add_data_func(path, fn, v9fs_run_pci_test); 469 } 470 471 int main(int argc, char **argv) 472 { 473 g_test_init(&argc, &argv, NULL); 474 v9fs_qtest_pci_add("/virtio/9p/pci/nop", NULL); 475 v9fs_qtest_pci_add("/virtio/9p/pci/config", pci_config); 476 v9fs_qtest_pci_add("/virtio/9p/pci/fs/version/basic", fs_version); 477 v9fs_qtest_pci_add("/virtio/9p/pci/fs/attach/basic", fs_attach); 478 v9fs_qtest_pci_add("/virtio/9p/pci/fs/walk/basic", fs_walk); 479 v9fs_qtest_pci_add("/virtio/9p/pci/fs/walk/no_slash", fs_walk_no_slash); 480 481 return g_test_run(); 482 } 483