1 /* 2 * Media Transfer Protocol implementation, backed by host filesystem. 3 * 4 * Copyright Red Hat, Inc 2014 5 * 6 * Author: 7 * Gerd Hoffmann <kraxel@redhat.com> 8 * 9 * This code is licensed under the GPL v2 or later. 10 */ 11 12 #include <wchar.h> 13 #include <dirent.h> 14 #include <unistd.h> 15 16 #include <sys/stat.h> 17 #include <sys/statvfs.h> 18 19 #include "qemu-common.h" 20 #include "qemu/iov.h" 21 #include "trace.h" 22 #include "hw/usb.h" 23 #include "hw/usb/desc.h" 24 25 /* ----------------------------------------------------------------------- */ 26 27 enum mtp_container_type { 28 TYPE_COMMAND = 1, 29 TYPE_DATA = 2, 30 TYPE_RESPONSE = 3, 31 TYPE_EVENT = 4, 32 }; 33 34 enum mtp_code { 35 /* command codes */ 36 CMD_GET_DEVICE_INFO = 0x1001, 37 CMD_OPEN_SESSION = 0x1002, 38 CMD_CLOSE_SESSION = 0x1003, 39 CMD_GET_STORAGE_IDS = 0x1004, 40 CMD_GET_STORAGE_INFO = 0x1005, 41 CMD_GET_NUM_OBJECTS = 0x1006, 42 CMD_GET_OBJECT_HANDLES = 0x1007, 43 CMD_GET_OBJECT_INFO = 0x1008, 44 CMD_GET_OBJECT = 0x1009, 45 CMD_GET_PARTIAL_OBJECT = 0x101b, 46 47 /* response codes */ 48 RES_OK = 0x2001, 49 RES_SESSION_NOT_OPEN = 0x2003, 50 RES_INVALID_TRANSACTION_ID = 0x2004, 51 RES_OPERATION_NOT_SUPPORTED = 0x2005, 52 RES_PARAMETER_NOT_SUPPORTED = 0x2006, 53 RES_INVALID_STORAGE_ID = 0x2008, 54 RES_INVALID_OBJECT_HANDLE = 0x2009, 55 RES_SPEC_BY_FORMAT_UNSUPPORTED = 0x2014, 56 RES_INVALID_PARENT_OBJECT = 0x201a, 57 RES_INVALID_PARAMETER = 0x201d, 58 RES_SESSION_ALREADY_OPEN = 0x201e, 59 60 /* format codes */ 61 FMT_UNDEFINED_OBJECT = 0x3000, 62 FMT_ASSOCIATION = 0x3001, 63 }; 64 65 typedef struct { 66 uint32_t length; 67 uint16_t type; 68 uint16_t code; 69 uint32_t trans; 70 } QEMU_PACKED mtp_container; 71 72 /* ----------------------------------------------------------------------- */ 73 74 typedef struct MTPState MTPState; 75 typedef struct MTPControl MTPControl; 76 typedef struct MTPData MTPData; 77 typedef struct MTPObject MTPObject; 78 79 enum { 80 EP_DATA_IN = 1, 81 EP_DATA_OUT, 82 EP_EVENT, 83 }; 84 85 struct MTPControl { 86 uint16_t code; 87 uint32_t trans; 88 int argc; 89 uint32_t argv[5]; 90 }; 91 92 struct MTPData { 93 uint16_t code; 94 uint32_t trans; 95 uint32_t offset; 96 uint32_t length; 97 uint32_t alloc; 98 uint8_t *data; 99 bool first; 100 int fd; 101 }; 102 103 struct MTPObject { 104 uint32_t handle; 105 uint16_t format; 106 char *name; 107 char *path; 108 struct stat stat; 109 MTPObject *parent; 110 MTPObject **children; 111 int32_t nchildren; 112 QTAILQ_ENTRY(MTPObject) next; 113 }; 114 115 struct MTPState { 116 USBDevice dev; 117 char *root; 118 char *desc; 119 uint32_t flags; 120 121 MTPData *data_in; 122 MTPData *data_out; 123 MTPControl *result; 124 uint32_t session; 125 uint32_t next_handle; 126 127 QTAILQ_HEAD(, MTPObject) objects; 128 }; 129 130 #define QEMU_STORAGE_ID 0x00010001 131 132 #define MTP_FLAG_WRITABLE 0 133 134 #define FLAG_SET(_mtp, _flag) ((_mtp)->flags & (1 << (_flag))) 135 136 /* ----------------------------------------------------------------------- */ 137 138 #define MTP_MANUFACTURER "QEMU" 139 #define MTP_PRODUCT "QEMU filesharing" 140 141 enum { 142 STR_MANUFACTURER = 1, 143 STR_PRODUCT, 144 STR_SERIALNUMBER, 145 STR_CONFIG_FULL, 146 STR_CONFIG_HIGH, 147 STR_CONFIG_SUPER, 148 }; 149 150 static const USBDescStrings desc_strings = { 151 [STR_MANUFACTURER] = MTP_MANUFACTURER, 152 [STR_PRODUCT] = MTP_PRODUCT, 153 [STR_SERIALNUMBER] = "34617", 154 [STR_CONFIG_FULL] = "Full speed config (usb 1.1)", 155 [STR_CONFIG_HIGH] = "High speed config (usb 2.0)", 156 [STR_CONFIG_SUPER] = "Super speed config (usb 3.0)", 157 }; 158 159 static const USBDescIface desc_iface_full = { 160 .bInterfaceNumber = 0, 161 .bNumEndpoints = 3, 162 .bInterfaceClass = USB_CLASS_STILL_IMAGE, 163 .bInterfaceSubClass = 0x01, 164 .bInterfaceProtocol = 0x01, 165 .eps = (USBDescEndpoint[]) { 166 { 167 .bEndpointAddress = USB_DIR_IN | EP_DATA_IN, 168 .bmAttributes = USB_ENDPOINT_XFER_BULK, 169 .wMaxPacketSize = 64, 170 },{ 171 .bEndpointAddress = USB_DIR_OUT | EP_DATA_OUT, 172 .bmAttributes = USB_ENDPOINT_XFER_BULK, 173 .wMaxPacketSize = 64, 174 },{ 175 .bEndpointAddress = USB_DIR_IN | EP_EVENT, 176 .bmAttributes = USB_ENDPOINT_XFER_INT, 177 .wMaxPacketSize = 8, 178 .bInterval = 0x0a, 179 }, 180 } 181 }; 182 183 static const USBDescDevice desc_device_full = { 184 .bcdUSB = 0x0200, 185 .bMaxPacketSize0 = 8, 186 .bNumConfigurations = 1, 187 .confs = (USBDescConfig[]) { 188 { 189 .bNumInterfaces = 1, 190 .bConfigurationValue = 1, 191 .iConfiguration = STR_CONFIG_FULL, 192 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP, 193 .bMaxPower = 2, 194 .nif = 1, 195 .ifs = &desc_iface_full, 196 }, 197 }, 198 }; 199 200 static const USBDescIface desc_iface_high = { 201 .bInterfaceNumber = 0, 202 .bNumEndpoints = 3, 203 .bInterfaceClass = USB_CLASS_STILL_IMAGE, 204 .bInterfaceSubClass = 0x01, 205 .bInterfaceProtocol = 0x01, 206 .eps = (USBDescEndpoint[]) { 207 { 208 .bEndpointAddress = USB_DIR_IN | EP_DATA_IN, 209 .bmAttributes = USB_ENDPOINT_XFER_BULK, 210 .wMaxPacketSize = 512, 211 },{ 212 .bEndpointAddress = USB_DIR_OUT | EP_DATA_OUT, 213 .bmAttributes = USB_ENDPOINT_XFER_BULK, 214 .wMaxPacketSize = 512, 215 },{ 216 .bEndpointAddress = USB_DIR_IN | EP_EVENT, 217 .bmAttributes = USB_ENDPOINT_XFER_INT, 218 .wMaxPacketSize = 8, 219 .bInterval = 0x0a, 220 }, 221 } 222 }; 223 224 static const USBDescDevice desc_device_high = { 225 .bcdUSB = 0x0200, 226 .bMaxPacketSize0 = 64, 227 .bNumConfigurations = 1, 228 .confs = (USBDescConfig[]) { 229 { 230 .bNumInterfaces = 1, 231 .bConfigurationValue = 1, 232 .iConfiguration = STR_CONFIG_HIGH, 233 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP, 234 .bMaxPower = 2, 235 .nif = 1, 236 .ifs = &desc_iface_high, 237 }, 238 }, 239 }; 240 241 static const USBDescMSOS desc_msos = { 242 .CompatibleID = "MTP", 243 .SelectiveSuspendEnabled = true, 244 }; 245 246 static const USBDesc desc = { 247 .id = { 248 .idVendor = 0x46f4, /* CRC16() of "QEMU" */ 249 .idProduct = 0x0004, 250 .bcdDevice = 0, 251 .iManufacturer = STR_MANUFACTURER, 252 .iProduct = STR_PRODUCT, 253 .iSerialNumber = STR_SERIALNUMBER, 254 }, 255 .full = &desc_device_full, 256 .high = &desc_device_high, 257 .str = desc_strings, 258 .msos = &desc_msos, 259 }; 260 261 /* ----------------------------------------------------------------------- */ 262 263 static MTPObject *usb_mtp_object_alloc(MTPState *s, uint32_t handle, 264 MTPObject *parent, char *name) 265 { 266 MTPObject *o = g_new0(MTPObject, 1); 267 268 if (name[0] == '.') { 269 goto ignore; 270 } 271 272 o->handle = handle; 273 o->parent = parent; 274 o->name = g_strdup(name); 275 o->nchildren = -1; 276 if (parent == NULL) { 277 o->path = g_strdup(name); 278 } else { 279 o->path = g_strdup_printf("%s/%s", parent->path, name); 280 } 281 282 if (lstat(o->path, &o->stat) != 0) { 283 goto ignore; 284 } 285 if (S_ISREG(o->stat.st_mode)) { 286 o->format = FMT_UNDEFINED_OBJECT; 287 } else if (S_ISDIR(o->stat.st_mode)) { 288 o->format = FMT_ASSOCIATION; 289 } else { 290 goto ignore; 291 } 292 293 if (access(o->path, R_OK) != 0) { 294 goto ignore; 295 } 296 297 fprintf(stderr, "%s: 0x%x %s\n", __func__, o->handle, o->path); 298 299 QTAILQ_INSERT_TAIL(&s->objects, o, next); 300 return o; 301 302 ignore: 303 g_free(o->name); 304 g_free(o->path); 305 g_free(o); 306 return NULL; 307 } 308 309 static void usb_mtp_object_free(MTPState *s, MTPObject *o) 310 { 311 int i; 312 313 fprintf(stderr, "%s: 0x%x %s\n", __func__, o->handle, o->path); 314 315 QTAILQ_REMOVE(&s->objects, o, next); 316 for (i = 0; i < o->nchildren; i++) { 317 usb_mtp_object_free(s, o->children[i]); 318 } 319 g_free(o->children); 320 g_free(o->name); 321 g_free(o->path); 322 g_free(o); 323 } 324 325 static MTPObject *usb_mtp_object_lookup(MTPState *s, uint32_t handle) 326 { 327 MTPObject *o; 328 329 QTAILQ_FOREACH(o, &s->objects, next) { 330 if (o->handle == handle) { 331 return o; 332 } 333 } 334 return NULL; 335 } 336 337 static void usb_mtp_object_readdir(MTPState *s, MTPObject *o) 338 { 339 struct dirent *entry; 340 DIR *dir; 341 342 o->nchildren = 0; 343 dir = opendir(o->path); 344 if (!dir) { 345 return; 346 } 347 while ((entry = readdir(dir)) != NULL) { 348 if ((o->nchildren % 32) == 0) { 349 o->children = g_realloc(o->children, 350 (o->nchildren + 32) * sizeof(MTPObject *)); 351 } 352 o->children[o->nchildren] = 353 usb_mtp_object_alloc(s, s->next_handle++, o, entry->d_name); 354 if (o->children[o->nchildren] != NULL) { 355 o->nchildren++; 356 } 357 } 358 closedir(dir); 359 } 360 361 /* ----------------------------------------------------------------------- */ 362 363 static MTPData *usb_mtp_data_alloc(MTPControl *c) 364 { 365 MTPData *data = g_new0(MTPData, 1); 366 367 data->code = c->code; 368 data->trans = c->trans; 369 data->fd = -1; 370 data->first = true; 371 return data; 372 } 373 374 static void usb_mtp_data_free(MTPData *data) 375 { 376 if (data == NULL) { 377 return; 378 } 379 if (data->fd != -1) { 380 close(data->fd); 381 } 382 g_free(data->data); 383 g_free(data); 384 } 385 386 static void usb_mtp_realloc(MTPData *data, uint32_t bytes) 387 { 388 if (data->length + bytes <= data->alloc) { 389 return; 390 } 391 data->alloc = (data->length + bytes + 0xff) & ~0xff; 392 data->data = g_realloc(data->data, data->alloc); 393 } 394 395 static void usb_mtp_add_u8(MTPData *data, uint8_t val) 396 { 397 usb_mtp_realloc(data, 1); 398 data->data[data->length++] = val; 399 } 400 401 static void usb_mtp_add_u16(MTPData *data, uint16_t val) 402 { 403 usb_mtp_realloc(data, 2); 404 data->data[data->length++] = (val >> 0) & 0xff; 405 data->data[data->length++] = (val >> 8) & 0xff; 406 } 407 408 static void usb_mtp_add_u32(MTPData *data, uint32_t val) 409 { 410 usb_mtp_realloc(data, 4); 411 data->data[data->length++] = (val >> 0) & 0xff; 412 data->data[data->length++] = (val >> 8) & 0xff; 413 data->data[data->length++] = (val >> 16) & 0xff; 414 data->data[data->length++] = (val >> 24) & 0xff; 415 } 416 417 static void usb_mtp_add_u64(MTPData *data, uint64_t val) 418 { 419 usb_mtp_realloc(data, 4); 420 data->data[data->length++] = (val >> 0) & 0xff; 421 data->data[data->length++] = (val >> 8) & 0xff; 422 data->data[data->length++] = (val >> 16) & 0xff; 423 data->data[data->length++] = (val >> 24) & 0xff; 424 data->data[data->length++] = (val >> 32) & 0xff; 425 data->data[data->length++] = (val >> 40) & 0xff; 426 data->data[data->length++] = (val >> 48) & 0xff; 427 data->data[data->length++] = (val >> 54) & 0xff; 428 } 429 430 static void usb_mtp_add_u16_array(MTPData *data, uint32_t len, 431 const uint16_t *vals) 432 { 433 int i; 434 435 usb_mtp_add_u32(data, len); 436 for (i = 0; i < len; i++) { 437 usb_mtp_add_u16(data, vals[i]); 438 } 439 } 440 441 static void usb_mtp_add_u32_array(MTPData *data, uint32_t len, 442 const uint32_t *vals) 443 { 444 int i; 445 446 usb_mtp_add_u32(data, len); 447 for (i = 0; i < len; i++) { 448 usb_mtp_add_u32(data, vals[i]); 449 } 450 } 451 452 static void usb_mtp_add_wstr(MTPData *data, const wchar_t *str) 453 { 454 uint32_t len = wcslen(str); 455 int i; 456 457 if (len > 0) { 458 len++; /* include terminating L'\0' */ 459 } 460 461 usb_mtp_add_u8(data, len); 462 for (i = 0; i < len; i++) { 463 usb_mtp_add_u16(data, str[i]); 464 } 465 } 466 467 static void usb_mtp_add_str(MTPData *data, const char *str) 468 { 469 uint32_t len = strlen(str)+1; 470 wchar_t wstr[len]; 471 size_t ret; 472 473 ret = mbstowcs(wstr, str, len); 474 if (ret == -1) { 475 usb_mtp_add_wstr(data, L"Oops"); 476 } else { 477 usb_mtp_add_wstr(data, wstr); 478 } 479 } 480 481 static void usb_mtp_add_time(MTPData *data, time_t time) 482 { 483 char buf[16]; 484 struct tm tm; 485 486 gmtime_r(&time, &tm); 487 strftime(buf, sizeof(buf), "%Y%m%dT%H%M%S", &tm); 488 usb_mtp_add_str(data, buf); 489 } 490 491 /* ----------------------------------------------------------------------- */ 492 493 static void usb_mtp_queue_result(MTPState *s, uint16_t code, uint32_t trans, 494 int argc, uint32_t arg0, uint32_t arg1) 495 { 496 MTPControl *c = g_new0(MTPControl, 1); 497 498 c->code = code; 499 c->trans = trans; 500 c->argc = argc; 501 if (argc > 0) { 502 c->argv[0] = arg0; 503 } 504 if (argc > 1) { 505 c->argv[1] = arg1; 506 } 507 508 assert(s->result == NULL); 509 s->result = c; 510 } 511 512 /* ----------------------------------------------------------------------- */ 513 514 static MTPData *usb_mtp_get_device_info(MTPState *s, MTPControl *c) 515 { 516 static const uint16_t ops[] = { 517 CMD_GET_DEVICE_INFO, 518 CMD_OPEN_SESSION, 519 CMD_CLOSE_SESSION, 520 CMD_GET_STORAGE_IDS, 521 CMD_GET_STORAGE_INFO, 522 CMD_GET_NUM_OBJECTS, 523 CMD_GET_OBJECT_HANDLES, 524 CMD_GET_OBJECT_INFO, 525 CMD_GET_OBJECT, 526 CMD_GET_PARTIAL_OBJECT, 527 }; 528 static const uint16_t fmt[] = { 529 FMT_UNDEFINED_OBJECT, 530 FMT_ASSOCIATION, 531 }; 532 MTPData *d = usb_mtp_data_alloc(c); 533 534 trace_usb_mtp_op_get_device_info(s->dev.addr); 535 536 usb_mtp_add_u16(d, 0x0100); 537 usb_mtp_add_u32(d, 0xffffffff); 538 usb_mtp_add_u16(d, 0x0101); 539 usb_mtp_add_wstr(d, L""); 540 usb_mtp_add_u16(d, 0x0000); 541 542 usb_mtp_add_u16_array(d, ARRAY_SIZE(ops), ops); 543 usb_mtp_add_u16_array(d, 0, NULL); 544 usb_mtp_add_u16_array(d, 0, NULL); 545 usb_mtp_add_u16_array(d, 0, NULL); 546 usb_mtp_add_u16_array(d, ARRAY_SIZE(fmt), fmt); 547 548 usb_mtp_add_wstr(d, L"" MTP_MANUFACTURER); 549 usb_mtp_add_wstr(d, L"" MTP_PRODUCT); 550 usb_mtp_add_wstr(d, L"0.1"); 551 usb_mtp_add_wstr(d, L"123456789abcdef123456789abcdef"); 552 553 return d; 554 } 555 556 static MTPData *usb_mtp_get_storage_ids(MTPState *s, MTPControl *c) 557 { 558 static const uint32_t ids[] = { 559 QEMU_STORAGE_ID, 560 }; 561 MTPData *d = usb_mtp_data_alloc(c); 562 563 trace_usb_mtp_op_get_storage_ids(s->dev.addr); 564 565 usb_mtp_add_u32_array(d, ARRAY_SIZE(ids), ids); 566 567 return d; 568 } 569 570 static MTPData *usb_mtp_get_storage_info(MTPState *s, MTPControl *c) 571 { 572 MTPData *d = usb_mtp_data_alloc(c); 573 struct statvfs buf; 574 int rc; 575 576 trace_usb_mtp_op_get_storage_info(s->dev.addr); 577 578 if (FLAG_SET(s, MTP_FLAG_WRITABLE)) { 579 usb_mtp_add_u16(d, 0x0003); 580 usb_mtp_add_u16(d, 0x0002); 581 usb_mtp_add_u16(d, 0x0000); 582 } else { 583 usb_mtp_add_u16(d, 0x0001); 584 usb_mtp_add_u16(d, 0x0002); 585 usb_mtp_add_u16(d, 0x0001); 586 } 587 588 rc = statvfs(s->root, &buf); 589 if (rc == 0) { 590 usb_mtp_add_u64(d, (uint64_t)buf.f_frsize * buf.f_blocks); 591 usb_mtp_add_u64(d, (uint64_t)buf.f_bavail * buf.f_blocks); 592 usb_mtp_add_u32(d, buf.f_ffree); 593 } else { 594 usb_mtp_add_u64(d, 0xffffffff); 595 usb_mtp_add_u64(d, 0xffffffff); 596 usb_mtp_add_u32(d, 0xffffffff); 597 } 598 599 usb_mtp_add_str(d, s->desc); 600 usb_mtp_add_wstr(d, L"123456789abcdef"); 601 return d; 602 } 603 604 static MTPData *usb_mtp_get_object_handles(MTPState *s, MTPControl *c, 605 MTPObject *o) 606 { 607 MTPData *d = usb_mtp_data_alloc(c); 608 uint32_t i, handles[o->nchildren]; 609 610 trace_usb_mtp_op_get_object_handles(s->dev.addr, o->handle, o->path); 611 612 for (i = 0; i < o->nchildren; i++) { 613 handles[i] = o->children[i]->handle; 614 } 615 usb_mtp_add_u32_array(d, o->nchildren, handles); 616 617 return d; 618 } 619 620 static MTPData *usb_mtp_get_object_info(MTPState *s, MTPControl *c, 621 MTPObject *o) 622 { 623 MTPData *d = usb_mtp_data_alloc(c); 624 625 trace_usb_mtp_op_get_object_info(s->dev.addr, o->handle, o->path); 626 627 usb_mtp_add_u32(d, QEMU_STORAGE_ID); 628 usb_mtp_add_u16(d, o->format); 629 usb_mtp_add_u16(d, 0); 630 usb_mtp_add_u32(d, o->stat.st_size); 631 632 usb_mtp_add_u16(d, 0); 633 usb_mtp_add_u32(d, 0); 634 usb_mtp_add_u32(d, 0); 635 usb_mtp_add_u32(d, 0); 636 usb_mtp_add_u32(d, 0); 637 usb_mtp_add_u32(d, 0); 638 usb_mtp_add_u32(d, 0); 639 640 if (o->parent) { 641 usb_mtp_add_u32(d, o->parent->handle); 642 } else { 643 usb_mtp_add_u32(d, 0); 644 } 645 if (o->format == FMT_ASSOCIATION) { 646 usb_mtp_add_u16(d, 0x0001); 647 usb_mtp_add_u32(d, 0x00000001); 648 usb_mtp_add_u32(d, 0); 649 } else { 650 usb_mtp_add_u16(d, 0); 651 usb_mtp_add_u32(d, 0); 652 usb_mtp_add_u32(d, 0); 653 } 654 655 usb_mtp_add_str(d, o->name); 656 usb_mtp_add_time(d, o->stat.st_ctime); 657 usb_mtp_add_time(d, o->stat.st_mtime); 658 usb_mtp_add_wstr(d, L""); 659 660 return d; 661 } 662 663 static MTPData *usb_mtp_get_object(MTPState *s, MTPControl *c, 664 MTPObject *o) 665 { 666 MTPData *d = usb_mtp_data_alloc(c); 667 668 trace_usb_mtp_op_get_object(s->dev.addr, o->handle, o->path); 669 670 d->fd = open(o->path, O_RDONLY); 671 if (d->fd == -1) { 672 return NULL; 673 } 674 d->length = o->stat.st_size; 675 d->alloc = 512; 676 d->data = g_malloc(d->alloc); 677 return d; 678 } 679 680 static MTPData *usb_mtp_get_partial_object(MTPState *s, MTPControl *c, 681 MTPObject *o) 682 { 683 MTPData *d = usb_mtp_data_alloc(c); 684 off_t offset; 685 686 trace_usb_mtp_op_get_partial_object(s->dev.addr, o->handle, o->path, 687 c->argv[1], c->argv[2]); 688 689 d->fd = open(o->path, O_RDONLY); 690 if (d->fd == -1) { 691 return NULL; 692 } 693 694 offset = c->argv[1]; 695 if (offset > o->stat.st_size) { 696 offset = o->stat.st_size; 697 } 698 lseek(d->fd, offset, SEEK_SET); 699 700 d->length = c->argv[2]; 701 if (d->length > o->stat.st_size - offset) { 702 d->length = o->stat.st_size - offset; 703 } 704 705 return d; 706 } 707 708 static void usb_mtp_command(MTPState *s, MTPControl *c) 709 { 710 MTPData *data_in = NULL; 711 MTPObject *o; 712 uint32_t nres = 0, res0 = 0; 713 714 /* sanity checks */ 715 if (c->code >= CMD_CLOSE_SESSION && s->session == 0) { 716 usb_mtp_queue_result(s, RES_SESSION_NOT_OPEN, 717 c->trans, 0, 0, 0); 718 return; 719 } 720 721 /* process commands */ 722 switch (c->code) { 723 case CMD_GET_DEVICE_INFO: 724 data_in = usb_mtp_get_device_info(s, c); 725 break; 726 case CMD_OPEN_SESSION: 727 if (s->session) { 728 usb_mtp_queue_result(s, RES_SESSION_ALREADY_OPEN, 729 c->trans, 1, s->session, 0); 730 return; 731 } 732 if (c->argv[0] == 0) { 733 usb_mtp_queue_result(s, RES_INVALID_PARAMETER, 734 c->trans, 0, 0, 0); 735 return; 736 } 737 trace_usb_mtp_op_open_session(s->dev.addr); 738 s->session = c->argv[0]; 739 usb_mtp_object_alloc(s, s->next_handle++, NULL, s->root); 740 break; 741 case CMD_CLOSE_SESSION: 742 trace_usb_mtp_op_close_session(s->dev.addr); 743 s->session = 0; 744 s->next_handle = 0; 745 usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects)); 746 assert(QTAILQ_EMPTY(&s->objects)); 747 break; 748 case CMD_GET_STORAGE_IDS: 749 data_in = usb_mtp_get_storage_ids(s, c); 750 break; 751 case CMD_GET_STORAGE_INFO: 752 if (c->argv[0] != QEMU_STORAGE_ID && 753 c->argv[0] != 0xffffffff) { 754 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID, 755 c->trans, 0, 0, 0); 756 return; 757 } 758 data_in = usb_mtp_get_storage_info(s, c); 759 break; 760 case CMD_GET_NUM_OBJECTS: 761 case CMD_GET_OBJECT_HANDLES: 762 if (c->argv[0] != QEMU_STORAGE_ID && 763 c->argv[0] != 0xffffffff) { 764 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID, 765 c->trans, 0, 0, 0); 766 return; 767 } 768 if (c->argv[1] != 0x00000000) { 769 usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED, 770 c->trans, 0, 0, 0); 771 return; 772 } 773 if (c->argv[2] == 0x00000000 || 774 c->argv[2] == 0xffffffff) { 775 o = QTAILQ_FIRST(&s->objects); 776 } else { 777 o = usb_mtp_object_lookup(s, c->argv[2]); 778 } 779 if (o == NULL) { 780 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 781 c->trans, 0, 0, 0); 782 return; 783 } 784 if (o->format != FMT_ASSOCIATION) { 785 usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT, 786 c->trans, 0, 0, 0); 787 return; 788 } 789 if (o->nchildren == -1) { 790 usb_mtp_object_readdir(s, o); 791 } 792 if (c->code == CMD_GET_NUM_OBJECTS) { 793 trace_usb_mtp_op_get_num_objects(s->dev.addr, o->handle, o->path); 794 nres = 1; 795 res0 = o->nchildren; 796 } else { 797 data_in = usb_mtp_get_object_handles(s, c, o); 798 } 799 break; 800 case CMD_GET_OBJECT_INFO: 801 o = usb_mtp_object_lookup(s, c->argv[0]); 802 if (o == NULL) { 803 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 804 c->trans, 0, 0, 0); 805 return; 806 } 807 data_in = usb_mtp_get_object_info(s, c, o); 808 break; 809 case CMD_GET_OBJECT: 810 o = usb_mtp_object_lookup(s, c->argv[0]); 811 if (o == NULL) { 812 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 813 c->trans, 0, 0, 0); 814 return; 815 } 816 if (o->format == FMT_ASSOCIATION) { 817 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 818 c->trans, 0, 0, 0); 819 return; 820 } 821 data_in = usb_mtp_get_object(s, c, o); 822 if (NULL == data_in) { 823 fprintf(stderr, "%s: TODO: handle error\n", __func__); 824 } 825 break; 826 case CMD_GET_PARTIAL_OBJECT: 827 o = usb_mtp_object_lookup(s, c->argv[0]); 828 if (o == NULL) { 829 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 830 c->trans, 0, 0, 0); 831 return; 832 } 833 if (o->format == FMT_ASSOCIATION) { 834 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 835 c->trans, 0, 0, 0); 836 return; 837 } 838 data_in = usb_mtp_get_partial_object(s, c, o); 839 if (NULL == data_in) { 840 fprintf(stderr, "%s: TODO: handle error\n", __func__); 841 } 842 nres = 1; 843 res0 = data_in->length; 844 break; 845 default: 846 fprintf(stderr, "%s: unknown command code 0x%04x\n", 847 __func__, c->code); 848 usb_mtp_queue_result(s, RES_OPERATION_NOT_SUPPORTED, 849 c->trans, 0, 0, 0); 850 return; 851 } 852 853 /* return results on success */ 854 if (data_in) { 855 assert(s->data_in == NULL); 856 s->data_in = data_in; 857 } 858 usb_mtp_queue_result(s, RES_OK, c->trans, nres, res0, 0); 859 } 860 861 /* ----------------------------------------------------------------------- */ 862 863 static void usb_mtp_handle_reset(USBDevice *dev) 864 { 865 MTPState *s = DO_UPCAST(MTPState, dev, dev); 866 867 trace_usb_mtp_reset(s->dev.addr); 868 869 s->session = 0; 870 usb_mtp_data_free(s->data_in); 871 s->data_in = NULL; 872 usb_mtp_data_free(s->data_out); 873 s->data_out = NULL; 874 g_free(s->result); 875 s->result = NULL; 876 } 877 878 static void usb_mtp_handle_control(USBDevice *dev, USBPacket *p, 879 int request, int value, int index, 880 int length, uint8_t *data) 881 { 882 int ret; 883 884 ret = usb_desc_handle_control(dev, p, request, value, index, length, data); 885 if (ret >= 0) { 886 return; 887 } 888 889 trace_usb_mtp_stall(dev->addr, "unknown control request"); 890 p->status = USB_RET_STALL; 891 } 892 893 static void usb_mtp_cancel_packet(USBDevice *dev, USBPacket *p) 894 { 895 fprintf(stderr, "%s\n", __func__); 896 } 897 898 static void usb_mtp_handle_data(USBDevice *dev, USBPacket *p) 899 { 900 MTPState *s = DO_UPCAST(MTPState, dev, dev); 901 MTPControl cmd; 902 mtp_container container; 903 uint32_t params[5]; 904 int i, rc; 905 906 switch (p->ep->nr) { 907 case EP_DATA_IN: 908 if (s->data_out != NULL) { 909 /* guest bug */ 910 trace_usb_mtp_stall(s->dev.addr, "awaiting data-out"); 911 p->status = USB_RET_STALL; 912 return; 913 } 914 if (p->iov.size < sizeof(container)) { 915 trace_usb_mtp_stall(s->dev.addr, "packet too small"); 916 p->status = USB_RET_STALL; 917 return; 918 } 919 if (s->data_in != NULL) { 920 MTPData *d = s->data_in; 921 int dlen = d->length - d->offset; 922 if (d->first) { 923 trace_usb_mtp_data_in(s->dev.addr, d->trans, d->length); 924 container.length = cpu_to_le32(d->length + sizeof(container)); 925 container.type = cpu_to_le16(TYPE_DATA); 926 container.code = cpu_to_le16(d->code); 927 container.trans = cpu_to_le32(d->trans); 928 usb_packet_copy(p, &container, sizeof(container)); 929 d->first = false; 930 if (dlen > p->iov.size - sizeof(container)) { 931 dlen = p->iov.size - sizeof(container); 932 } 933 } else { 934 if (dlen > p->iov.size) { 935 dlen = p->iov.size; 936 } 937 } 938 if (d->fd == -1) { 939 usb_packet_copy(p, d->data + d->offset, dlen); 940 } else { 941 if (d->alloc < p->iov.size) { 942 d->alloc = p->iov.size; 943 d->data = g_realloc(d->data, d->alloc); 944 } 945 rc = read(d->fd, d->data, dlen); 946 if (rc != dlen) { 947 fprintf(stderr, "%s: TODO: handle read error\n", __func__); 948 } 949 usb_packet_copy(p, d->data, dlen); 950 } 951 d->offset += dlen; 952 if (d->offset == d->length) { 953 usb_mtp_data_free(s->data_in); 954 s->data_in = NULL; 955 } 956 } else if (s->result != NULL) { 957 MTPControl *r = s->result; 958 int length = sizeof(container) + r->argc * sizeof(uint32_t); 959 if (r->code == RES_OK) { 960 trace_usb_mtp_success(s->dev.addr, r->trans, 961 (r->argc > 0) ? r->argv[0] : 0, 962 (r->argc > 1) ? r->argv[1] : 0); 963 } else { 964 trace_usb_mtp_error(s->dev.addr, r->code, r->trans, 965 (r->argc > 0) ? r->argv[0] : 0, 966 (r->argc > 1) ? r->argv[1] : 0); 967 } 968 container.length = cpu_to_le32(length); 969 container.type = cpu_to_le16(TYPE_RESPONSE); 970 container.code = cpu_to_le16(r->code); 971 container.trans = cpu_to_le32(r->trans); 972 for (i = 0; i < r->argc; i++) { 973 params[i] = cpu_to_le32(r->argv[i]); 974 } 975 usb_packet_copy(p, &container, sizeof(container)); 976 usb_packet_copy(p, ¶ms, length - sizeof(container)); 977 g_free(s->result); 978 s->result = NULL; 979 } 980 break; 981 case EP_DATA_OUT: 982 if (p->iov.size < sizeof(container)) { 983 trace_usb_mtp_stall(s->dev.addr, "packet too small"); 984 p->status = USB_RET_STALL; 985 return; 986 } 987 usb_packet_copy(p, &container, sizeof(container)); 988 switch (le16_to_cpu(container.type)) { 989 case TYPE_COMMAND: 990 if (s->data_in || s->data_out || s->result) { 991 trace_usb_mtp_stall(s->dev.addr, "transaction inflight"); 992 p->status = USB_RET_STALL; 993 return; 994 } 995 cmd.code = le16_to_cpu(container.code); 996 cmd.argc = (le32_to_cpu(container.length) - sizeof(container)) 997 / sizeof(uint32_t); 998 cmd.trans = le32_to_cpu(container.trans); 999 usb_packet_copy(p, ¶ms, cmd.argc * sizeof(uint32_t)); 1000 for (i = 0; i < cmd.argc; i++) { 1001 cmd.argv[i] = le32_to_cpu(params[i]); 1002 } 1003 trace_usb_mtp_command(s->dev.addr, cmd.code, cmd.trans, 1004 (cmd.argc > 0) ? cmd.argv[0] : 0, 1005 (cmd.argc > 1) ? cmd.argv[1] : 0, 1006 (cmd.argc > 2) ? cmd.argv[2] : 0, 1007 (cmd.argc > 3) ? cmd.argv[3] : 0, 1008 (cmd.argc > 4) ? cmd.argv[4] : 0); 1009 usb_mtp_command(s, &cmd); 1010 break; 1011 default: 1012 iov_hexdump(p->iov.iov, p->iov.niov, stderr, "mtp-out", 32); 1013 trace_usb_mtp_stall(s->dev.addr, "TODO: implement data-out"); 1014 p->status = USB_RET_STALL; 1015 return; 1016 } 1017 break; 1018 case EP_EVENT: 1019 p->status = USB_RET_NAK; 1020 return; 1021 default: 1022 trace_usb_mtp_stall(s->dev.addr, "invalid endpoint"); 1023 p->status = USB_RET_STALL; 1024 return; 1025 } 1026 1027 if (p->actual_length == 0) { 1028 trace_usb_mtp_nak(s->dev.addr, p->ep->nr); 1029 p->status = USB_RET_NAK; 1030 return; 1031 } else { 1032 trace_usb_mtp_xfer(s->dev.addr, p->ep->nr, p->actual_length, 1033 p->iov.size); 1034 return; 1035 } 1036 } 1037 1038 static int usb_mtp_initfn(USBDevice *dev) 1039 { 1040 MTPState *s = DO_UPCAST(MTPState, dev, dev); 1041 1042 usb_desc_create_serial(dev); 1043 usb_desc_init(dev); 1044 QTAILQ_INIT(&s->objects); 1045 if (s->desc == NULL) { 1046 s->desc = strrchr(s->root, '/'); 1047 if (s->desc) { 1048 s->desc = g_strdup(s->desc + 1); 1049 } else { 1050 s->desc = g_strdup("none"); 1051 } 1052 } 1053 return 0; 1054 } 1055 1056 static const VMStateDescription vmstate_usb_mtp = { 1057 .name = "usb-mtp", 1058 .unmigratable = 1, 1059 .version_id = 1, 1060 .minimum_version_id = 1, 1061 .fields = (VMStateField[]) { 1062 VMSTATE_USB_DEVICE(dev, MTPState), 1063 VMSTATE_END_OF_LIST() 1064 } 1065 }; 1066 1067 static Property mtp_properties[] = { 1068 DEFINE_PROP_STRING("root", MTPState, root), 1069 DEFINE_PROP_STRING("desc", MTPState, desc), 1070 DEFINE_PROP_END_OF_LIST(), 1071 }; 1072 1073 static void usb_mtp_class_initfn(ObjectClass *klass, void *data) 1074 { 1075 DeviceClass *dc = DEVICE_CLASS(klass); 1076 USBDeviceClass *uc = USB_DEVICE_CLASS(klass); 1077 1078 uc->init = usb_mtp_initfn; 1079 uc->product_desc = "QEMU USB MTP"; 1080 uc->usb_desc = &desc; 1081 uc->cancel_packet = usb_mtp_cancel_packet; 1082 uc->handle_attach = usb_desc_attach; 1083 uc->handle_reset = usb_mtp_handle_reset; 1084 uc->handle_control = usb_mtp_handle_control; 1085 uc->handle_data = usb_mtp_handle_data; 1086 dc->fw_name = "mtp"; 1087 dc->vmsd = &vmstate_usb_mtp; 1088 dc->props = mtp_properties; 1089 } 1090 1091 static TypeInfo mtp_info = { 1092 .name = "usb-mtp", 1093 .parent = TYPE_USB_DEVICE, 1094 .instance_size = sizeof(MTPState), 1095 .class_init = usb_mtp_class_initfn, 1096 }; 1097 1098 static void usb_mtp_register_types(void) 1099 { 1100 type_register_static(&mtp_info); 1101 } 1102 1103 type_init(usb_mtp_register_types) 1104