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 "qemu/osdep.h" 13 #include "qapi/error.h" 14 #include <wchar.h> 15 #include <dirent.h> 16 17 #include <sys/statvfs.h> 18 #ifdef CONFIG_INOTIFY1 19 #include <sys/inotify.h> 20 #include "qapi/error.h" 21 #include "qemu/main-loop.h" 22 #endif 23 24 #include "qemu-common.h" 25 #include "qemu/iov.h" 26 #include "trace.h" 27 #include "hw/usb.h" 28 #include "hw/usb/desc.h" 29 30 /* ----------------------------------------------------------------------- */ 31 32 enum mtp_container_type { 33 TYPE_COMMAND = 1, 34 TYPE_DATA = 2, 35 TYPE_RESPONSE = 3, 36 TYPE_EVENT = 4, 37 }; 38 39 enum mtp_code { 40 /* command codes */ 41 CMD_GET_DEVICE_INFO = 0x1001, 42 CMD_OPEN_SESSION = 0x1002, 43 CMD_CLOSE_SESSION = 0x1003, 44 CMD_GET_STORAGE_IDS = 0x1004, 45 CMD_GET_STORAGE_INFO = 0x1005, 46 CMD_GET_NUM_OBJECTS = 0x1006, 47 CMD_GET_OBJECT_HANDLES = 0x1007, 48 CMD_GET_OBJECT_INFO = 0x1008, 49 CMD_GET_OBJECT = 0x1009, 50 CMD_GET_PARTIAL_OBJECT = 0x101b, 51 CMD_GET_OBJECT_PROPS_SUPPORTED = 0x9801, 52 CMD_GET_OBJECT_PROP_DESC = 0x9802, 53 CMD_GET_OBJECT_PROP_VALUE = 0x9803, 54 55 /* response codes */ 56 RES_OK = 0x2001, 57 RES_GENERAL_ERROR = 0x2002, 58 RES_SESSION_NOT_OPEN = 0x2003, 59 RES_INVALID_TRANSACTION_ID = 0x2004, 60 RES_OPERATION_NOT_SUPPORTED = 0x2005, 61 RES_PARAMETER_NOT_SUPPORTED = 0x2006, 62 RES_INCOMPLETE_TRANSFER = 0x2007, 63 RES_INVALID_STORAGE_ID = 0x2008, 64 RES_INVALID_OBJECT_HANDLE = 0x2009, 65 RES_INVALID_OBJECT_FORMAT_CODE = 0x200b, 66 RES_SPEC_BY_FORMAT_UNSUPPORTED = 0x2014, 67 RES_INVALID_PARENT_OBJECT = 0x201a, 68 RES_INVALID_PARAMETER = 0x201d, 69 RES_SESSION_ALREADY_OPEN = 0x201e, 70 RES_INVALID_OBJECT_PROP_CODE = 0xA801, 71 72 /* format codes */ 73 FMT_UNDEFINED_OBJECT = 0x3000, 74 FMT_ASSOCIATION = 0x3001, 75 76 /* event codes */ 77 EVT_OBJ_ADDED = 0x4002, 78 EVT_OBJ_REMOVED = 0x4003, 79 EVT_OBJ_INFO_CHANGED = 0x4007, 80 81 /* object properties */ 82 PROP_STORAGE_ID = 0xDC01, 83 PROP_OBJECT_FORMAT = 0xDC02, 84 PROP_OBJECT_COMPRESSED_SIZE = 0xDC04, 85 PROP_PARENT_OBJECT = 0xDC0B, 86 PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER = 0xDC41, 87 PROP_NAME = 0xDC44, 88 }; 89 90 enum mtp_data_type { 91 DATA_TYPE_UINT16 = 0x0004, 92 DATA_TYPE_UINT32 = 0x0006, 93 DATA_TYPE_UINT64 = 0x0008, 94 DATA_TYPE_UINT128 = 0x000a, 95 DATA_TYPE_STRING = 0xffff, 96 }; 97 98 typedef struct { 99 uint32_t length; 100 uint16_t type; 101 uint16_t code; 102 uint32_t trans; 103 } QEMU_PACKED mtp_container; 104 105 /* ----------------------------------------------------------------------- */ 106 107 typedef struct MTPState MTPState; 108 typedef struct MTPControl MTPControl; 109 typedef struct MTPData MTPData; 110 typedef struct MTPObject MTPObject; 111 112 enum { 113 EP_DATA_IN = 1, 114 EP_DATA_OUT, 115 EP_EVENT, 116 }; 117 118 #ifdef CONFIG_INOTIFY1 119 typedef struct MTPMonEntry MTPMonEntry; 120 121 struct MTPMonEntry { 122 uint32_t event; 123 uint32_t handle; 124 125 QTAILQ_ENTRY(MTPMonEntry) next; 126 }; 127 #endif 128 129 struct MTPControl { 130 uint16_t code; 131 uint32_t trans; 132 int argc; 133 uint32_t argv[5]; 134 }; 135 136 struct MTPData { 137 uint16_t code; 138 uint32_t trans; 139 uint64_t offset; 140 uint64_t length; 141 uint32_t alloc; 142 uint8_t *data; 143 bool first; 144 int fd; 145 }; 146 147 struct MTPObject { 148 uint32_t handle; 149 uint16_t format; 150 char *name; 151 char *path; 152 struct stat stat; 153 #ifdef CONFIG_INOTIFY1 154 /* inotify watch cookie */ 155 int watchfd; 156 #endif 157 MTPObject *parent; 158 uint32_t nchildren; 159 QLIST_HEAD(, MTPObject) children; 160 QLIST_ENTRY(MTPObject) list; 161 bool have_children; 162 QTAILQ_ENTRY(MTPObject) next; 163 }; 164 165 struct MTPState { 166 USBDevice dev; 167 char *root; 168 char *desc; 169 uint32_t flags; 170 171 MTPData *data_in; 172 MTPData *data_out; 173 MTPControl *result; 174 uint32_t session; 175 uint32_t next_handle; 176 177 QTAILQ_HEAD(, MTPObject) objects; 178 #ifdef CONFIG_INOTIFY1 179 /* inotify descriptor */ 180 int inotifyfd; 181 QTAILQ_HEAD(events, MTPMonEntry) events; 182 #endif 183 }; 184 185 #define TYPE_USB_MTP "usb-mtp" 186 #define USB_MTP(obj) OBJECT_CHECK(MTPState, (obj), TYPE_USB_MTP) 187 188 #define QEMU_STORAGE_ID 0x00010001 189 190 #define MTP_FLAG_WRITABLE 0 191 192 #define FLAG_SET(_mtp, _flag) ((_mtp)->flags & (1 << (_flag))) 193 194 /* ----------------------------------------------------------------------- */ 195 196 #define MTP_MANUFACTURER "QEMU" 197 #define MTP_PRODUCT "QEMU filesharing" 198 199 enum { 200 STR_MANUFACTURER = 1, 201 STR_PRODUCT, 202 STR_SERIALNUMBER, 203 STR_MTP, 204 STR_CONFIG_FULL, 205 STR_CONFIG_HIGH, 206 STR_CONFIG_SUPER, 207 }; 208 209 static const USBDescStrings desc_strings = { 210 [STR_MANUFACTURER] = MTP_MANUFACTURER, 211 [STR_PRODUCT] = MTP_PRODUCT, 212 [STR_SERIALNUMBER] = "34617", 213 [STR_MTP] = "MTP", 214 [STR_CONFIG_FULL] = "Full speed config (usb 1.1)", 215 [STR_CONFIG_HIGH] = "High speed config (usb 2.0)", 216 [STR_CONFIG_SUPER] = "Super speed config (usb 3.0)", 217 }; 218 219 static const USBDescIface desc_iface_full = { 220 .bInterfaceNumber = 0, 221 .bNumEndpoints = 3, 222 .bInterfaceClass = USB_CLASS_STILL_IMAGE, 223 .bInterfaceSubClass = 0x01, 224 .bInterfaceProtocol = 0x01, 225 .iInterface = STR_MTP, 226 .eps = (USBDescEndpoint[]) { 227 { 228 .bEndpointAddress = USB_DIR_IN | EP_DATA_IN, 229 .bmAttributes = USB_ENDPOINT_XFER_BULK, 230 .wMaxPacketSize = 64, 231 },{ 232 .bEndpointAddress = USB_DIR_OUT | EP_DATA_OUT, 233 .bmAttributes = USB_ENDPOINT_XFER_BULK, 234 .wMaxPacketSize = 64, 235 },{ 236 .bEndpointAddress = USB_DIR_IN | EP_EVENT, 237 .bmAttributes = USB_ENDPOINT_XFER_INT, 238 .wMaxPacketSize = 64, 239 .bInterval = 0x0a, 240 }, 241 } 242 }; 243 244 static const USBDescDevice desc_device_full = { 245 .bcdUSB = 0x0200, 246 .bMaxPacketSize0 = 8, 247 .bNumConfigurations = 1, 248 .confs = (USBDescConfig[]) { 249 { 250 .bNumInterfaces = 1, 251 .bConfigurationValue = 1, 252 .iConfiguration = STR_CONFIG_FULL, 253 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP, 254 .bMaxPower = 2, 255 .nif = 1, 256 .ifs = &desc_iface_full, 257 }, 258 }, 259 }; 260 261 static const USBDescIface desc_iface_high = { 262 .bInterfaceNumber = 0, 263 .bNumEndpoints = 3, 264 .bInterfaceClass = USB_CLASS_STILL_IMAGE, 265 .bInterfaceSubClass = 0x01, 266 .bInterfaceProtocol = 0x01, 267 .iInterface = STR_MTP, 268 .eps = (USBDescEndpoint[]) { 269 { 270 .bEndpointAddress = USB_DIR_IN | EP_DATA_IN, 271 .bmAttributes = USB_ENDPOINT_XFER_BULK, 272 .wMaxPacketSize = 512, 273 },{ 274 .bEndpointAddress = USB_DIR_OUT | EP_DATA_OUT, 275 .bmAttributes = USB_ENDPOINT_XFER_BULK, 276 .wMaxPacketSize = 512, 277 },{ 278 .bEndpointAddress = USB_DIR_IN | EP_EVENT, 279 .bmAttributes = USB_ENDPOINT_XFER_INT, 280 .wMaxPacketSize = 64, 281 .bInterval = 0x0a, 282 }, 283 } 284 }; 285 286 static const USBDescDevice desc_device_high = { 287 .bcdUSB = 0x0200, 288 .bMaxPacketSize0 = 64, 289 .bNumConfigurations = 1, 290 .confs = (USBDescConfig[]) { 291 { 292 .bNumInterfaces = 1, 293 .bConfigurationValue = 1, 294 .iConfiguration = STR_CONFIG_HIGH, 295 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP, 296 .bMaxPower = 2, 297 .nif = 1, 298 .ifs = &desc_iface_high, 299 }, 300 }, 301 }; 302 303 static const USBDescMSOS desc_msos = { 304 .CompatibleID = "MTP", 305 .SelectiveSuspendEnabled = true, 306 }; 307 308 static const USBDesc desc = { 309 .id = { 310 .idVendor = 0x46f4, /* CRC16() of "QEMU" */ 311 .idProduct = 0x0004, 312 .bcdDevice = 0, 313 .iManufacturer = STR_MANUFACTURER, 314 .iProduct = STR_PRODUCT, 315 .iSerialNumber = STR_SERIALNUMBER, 316 }, 317 .full = &desc_device_full, 318 .high = &desc_device_high, 319 .str = desc_strings, 320 .msos = &desc_msos, 321 }; 322 323 /* ----------------------------------------------------------------------- */ 324 325 static MTPObject *usb_mtp_object_alloc(MTPState *s, uint32_t handle, 326 MTPObject *parent, char *name) 327 { 328 MTPObject *o = g_new0(MTPObject, 1); 329 330 if (name[0] == '.') { 331 goto ignore; 332 } 333 334 o->handle = handle; 335 o->parent = parent; 336 o->name = g_strdup(name); 337 if (parent == NULL) { 338 o->path = g_strdup(name); 339 } else { 340 o->path = g_strdup_printf("%s/%s", parent->path, name); 341 } 342 343 if (lstat(o->path, &o->stat) != 0) { 344 goto ignore; 345 } 346 if (S_ISREG(o->stat.st_mode)) { 347 o->format = FMT_UNDEFINED_OBJECT; 348 } else if (S_ISDIR(o->stat.st_mode)) { 349 o->format = FMT_ASSOCIATION; 350 } else { 351 goto ignore; 352 } 353 354 if (access(o->path, R_OK) != 0) { 355 goto ignore; 356 } 357 358 trace_usb_mtp_object_alloc(s->dev.addr, o->handle, o->path); 359 360 QTAILQ_INSERT_TAIL(&s->objects, o, next); 361 return o; 362 363 ignore: 364 g_free(o->name); 365 g_free(o->path); 366 g_free(o); 367 return NULL; 368 } 369 370 static void usb_mtp_object_free(MTPState *s, MTPObject *o) 371 { 372 MTPObject *iter; 373 374 if (!o) { 375 return; 376 } 377 378 trace_usb_mtp_object_free(s->dev.addr, o->handle, o->path); 379 380 QTAILQ_REMOVE(&s->objects, o, next); 381 if (o->parent) { 382 QLIST_REMOVE(o, list); 383 o->parent->nchildren--; 384 } 385 386 while (!QLIST_EMPTY(&o->children)) { 387 iter = QLIST_FIRST(&o->children); 388 usb_mtp_object_free(s, iter); 389 } 390 g_free(o->name); 391 g_free(o->path); 392 g_free(o); 393 } 394 395 static MTPObject *usb_mtp_object_lookup(MTPState *s, uint32_t handle) 396 { 397 MTPObject *o; 398 399 QTAILQ_FOREACH(o, &s->objects, next) { 400 if (o->handle == handle) { 401 return o; 402 } 403 } 404 return NULL; 405 } 406 407 static MTPObject *usb_mtp_add_child(MTPState *s, MTPObject *o, 408 char *name) 409 { 410 MTPObject *child = 411 usb_mtp_object_alloc(s, s->next_handle++, o, name); 412 413 if (child) { 414 trace_usb_mtp_add_child(s->dev.addr, child->handle, child->path); 415 QLIST_INSERT_HEAD(&o->children, child, list); 416 o->nchildren++; 417 418 if (child->format == FMT_ASSOCIATION) { 419 QLIST_INIT(&child->children); 420 } 421 } 422 423 return child; 424 } 425 426 #ifdef CONFIG_INOTIFY1 427 static MTPObject *usb_mtp_object_lookup_name(MTPObject *parent, 428 char *name, int len) 429 { 430 MTPObject *iter; 431 432 QLIST_FOREACH(iter, &parent->children, list) { 433 if (strncmp(iter->name, name, len) == 0) { 434 return iter; 435 } 436 } 437 438 return NULL; 439 } 440 441 static MTPObject *usb_mtp_object_lookup_wd(MTPState *s, int wd) 442 { 443 MTPObject *iter; 444 445 QTAILQ_FOREACH(iter, &s->objects, next) { 446 if (iter->watchfd == wd) { 447 return iter; 448 } 449 } 450 451 return NULL; 452 } 453 454 static void inotify_watchfn(void *arg) 455 { 456 MTPState *s = arg; 457 ssize_t bytes; 458 /* From the man page: atleast one event can be read */ 459 int pos; 460 char buf[sizeof(struct inotify_event) + NAME_MAX + 1]; 461 462 for (;;) { 463 bytes = read(s->inotifyfd, buf, sizeof(buf)); 464 pos = 0; 465 466 if (bytes <= 0) { 467 /* Better luck next time */ 468 return; 469 } 470 471 /* 472 * TODO: Ignore initiator initiated events. 473 * For now we are good because the store is RO 474 */ 475 while (bytes > 0) { 476 char *p = buf + pos; 477 struct inotify_event *event = (struct inotify_event *)p; 478 int watchfd = 0; 479 uint32_t mask = event->mask & (IN_CREATE | IN_DELETE | 480 IN_MODIFY | IN_IGNORED); 481 MTPObject *parent = usb_mtp_object_lookup_wd(s, event->wd); 482 MTPMonEntry *entry = NULL; 483 MTPObject *o; 484 485 pos = pos + sizeof(struct inotify_event) + event->len; 486 bytes = bytes - pos; 487 488 if (!parent) { 489 continue; 490 } 491 492 switch (mask) { 493 case IN_CREATE: 494 if (usb_mtp_object_lookup_name 495 (parent, event->name, event->len)) { 496 /* Duplicate create event */ 497 continue; 498 } 499 entry = g_new0(MTPMonEntry, 1); 500 entry->handle = s->next_handle; 501 entry->event = EVT_OBJ_ADDED; 502 o = usb_mtp_add_child(s, parent, event->name); 503 if (!o) { 504 g_free(entry); 505 continue; 506 } 507 o->watchfd = watchfd; 508 trace_usb_mtp_inotify_event(s->dev.addr, event->name, 509 event->mask, "Obj Added"); 510 break; 511 512 case IN_DELETE: 513 /* 514 * The kernel issues a IN_IGNORED event 515 * when a dir containing a watchpoint is 516 * deleted, so we don't have to delete the 517 * watchpoint 518 */ 519 o = usb_mtp_object_lookup_name(parent, event->name, event->len); 520 if (!o) { 521 continue; 522 } 523 entry = g_new0(MTPMonEntry, 1); 524 entry->handle = o->handle; 525 entry->event = EVT_OBJ_REMOVED; 526 trace_usb_mtp_inotify_event(s->dev.addr, o->path, 527 event->mask, "Obj Deleted"); 528 usb_mtp_object_free(s, o); 529 break; 530 531 case IN_MODIFY: 532 o = usb_mtp_object_lookup_name(parent, event->name, event->len); 533 if (!o) { 534 continue; 535 } 536 entry = g_new0(MTPMonEntry, 1); 537 entry->handle = o->handle; 538 entry->event = EVT_OBJ_INFO_CHANGED; 539 trace_usb_mtp_inotify_event(s->dev.addr, o->path, 540 event->mask, "Obj Modified"); 541 break; 542 543 case IN_IGNORED: 544 o = usb_mtp_object_lookup_name(parent, event->name, event->len); 545 trace_usb_mtp_inotify_event(s->dev.addr, o->path, 546 event->mask, "Obj ignored"); 547 break; 548 549 default: 550 fprintf(stderr, "usb-mtp: failed to parse inotify event\n"); 551 continue; 552 } 553 554 if (entry) { 555 QTAILQ_INSERT_HEAD(&s->events, entry, next); 556 } 557 } 558 } 559 } 560 561 static int usb_mtp_inotify_init(MTPState *s) 562 { 563 int fd; 564 565 fd = inotify_init1(IN_NONBLOCK); 566 if (fd == -1) { 567 return 1; 568 } 569 570 QTAILQ_INIT(&s->events); 571 s->inotifyfd = fd; 572 573 qemu_set_fd_handler(fd, inotify_watchfn, NULL, s); 574 575 return 0; 576 } 577 578 static void usb_mtp_inotify_cleanup(MTPState *s) 579 { 580 MTPMonEntry *e, *p; 581 582 if (!s->inotifyfd) { 583 return; 584 } 585 586 qemu_set_fd_handler(s->inotifyfd, NULL, NULL, s); 587 close(s->inotifyfd); 588 589 QTAILQ_FOREACH_SAFE(e, &s->events, next, p) { 590 QTAILQ_REMOVE(&s->events, e, next); 591 g_free(e); 592 } 593 } 594 595 static int usb_mtp_add_watch(int inotifyfd, char *path) 596 { 597 uint32_t mask = IN_CREATE | IN_DELETE | IN_MODIFY | 598 IN_ISDIR; 599 600 return inotify_add_watch(inotifyfd, path, mask); 601 } 602 #endif 603 604 static void usb_mtp_object_readdir(MTPState *s, MTPObject *o) 605 { 606 struct dirent *entry; 607 DIR *dir; 608 609 if (o->have_children) { 610 return; 611 } 612 o->have_children = true; 613 614 dir = opendir(o->path); 615 if (!dir) { 616 return; 617 } 618 #ifdef CONFIG_INOTIFY1 619 int watchfd = usb_mtp_add_watch(s->inotifyfd, o->path); 620 if (watchfd == -1) { 621 fprintf(stderr, "usb-mtp: failed to add watch for %s\n", o->path); 622 } else { 623 trace_usb_mtp_inotify_event(s->dev.addr, o->path, 624 0, "Watch Added"); 625 o->watchfd = watchfd; 626 } 627 #endif 628 while ((entry = readdir(dir)) != NULL) { 629 usb_mtp_add_child(s, o, entry->d_name); 630 } 631 closedir(dir); 632 } 633 634 /* ----------------------------------------------------------------------- */ 635 636 static MTPData *usb_mtp_data_alloc(MTPControl *c) 637 { 638 MTPData *data = g_new0(MTPData, 1); 639 640 data->code = c->code; 641 data->trans = c->trans; 642 data->fd = -1; 643 data->first = true; 644 return data; 645 } 646 647 static void usb_mtp_data_free(MTPData *data) 648 { 649 if (data == NULL) { 650 return; 651 } 652 if (data->fd != -1) { 653 close(data->fd); 654 } 655 g_free(data->data); 656 g_free(data); 657 } 658 659 static void usb_mtp_realloc(MTPData *data, uint32_t bytes) 660 { 661 if (data->length + bytes <= data->alloc) { 662 return; 663 } 664 data->alloc = (data->length + bytes + 0xff) & ~0xff; 665 data->data = g_realloc(data->data, data->alloc); 666 } 667 668 static void usb_mtp_add_u8(MTPData *data, uint8_t val) 669 { 670 usb_mtp_realloc(data, 1); 671 data->data[data->length++] = val; 672 } 673 674 static void usb_mtp_add_u16(MTPData *data, uint16_t val) 675 { 676 usb_mtp_realloc(data, 2); 677 data->data[data->length++] = (val >> 0) & 0xff; 678 data->data[data->length++] = (val >> 8) & 0xff; 679 } 680 681 static void usb_mtp_add_u32(MTPData *data, uint32_t val) 682 { 683 usb_mtp_realloc(data, 4); 684 data->data[data->length++] = (val >> 0) & 0xff; 685 data->data[data->length++] = (val >> 8) & 0xff; 686 data->data[data->length++] = (val >> 16) & 0xff; 687 data->data[data->length++] = (val >> 24) & 0xff; 688 } 689 690 static void usb_mtp_add_u64(MTPData *data, uint64_t val) 691 { 692 usb_mtp_realloc(data, 8); 693 data->data[data->length++] = (val >> 0) & 0xff; 694 data->data[data->length++] = (val >> 8) & 0xff; 695 data->data[data->length++] = (val >> 16) & 0xff; 696 data->data[data->length++] = (val >> 24) & 0xff; 697 data->data[data->length++] = (val >> 32) & 0xff; 698 data->data[data->length++] = (val >> 40) & 0xff; 699 data->data[data->length++] = (val >> 48) & 0xff; 700 data->data[data->length++] = (val >> 56) & 0xff; 701 } 702 703 static void usb_mtp_add_u16_array(MTPData *data, uint32_t len, 704 const uint16_t *vals) 705 { 706 int i; 707 708 usb_mtp_add_u32(data, len); 709 for (i = 0; i < len; i++) { 710 usb_mtp_add_u16(data, vals[i]); 711 } 712 } 713 714 static void usb_mtp_add_u32_array(MTPData *data, uint32_t len, 715 const uint32_t *vals) 716 { 717 int i; 718 719 usb_mtp_add_u32(data, len); 720 for (i = 0; i < len; i++) { 721 usb_mtp_add_u32(data, vals[i]); 722 } 723 } 724 725 static void usb_mtp_add_wstr(MTPData *data, const wchar_t *str) 726 { 727 uint32_t len = wcslen(str); 728 int i; 729 730 if (len > 0) { 731 len++; /* include terminating L'\0' */ 732 } 733 734 usb_mtp_add_u8(data, len); 735 for (i = 0; i < len; i++) { 736 usb_mtp_add_u16(data, str[i]); 737 } 738 } 739 740 static void usb_mtp_add_str(MTPData *data, const char *str) 741 { 742 uint32_t len = strlen(str)+1; 743 wchar_t *wstr = g_new(wchar_t, len); 744 size_t ret; 745 746 ret = mbstowcs(wstr, str, len); 747 if (ret == -1) { 748 usb_mtp_add_wstr(data, L"Oops"); 749 } else { 750 usb_mtp_add_wstr(data, wstr); 751 } 752 753 g_free(wstr); 754 } 755 756 static void usb_mtp_add_time(MTPData *data, time_t time) 757 { 758 char buf[16]; 759 struct tm tm; 760 761 gmtime_r(&time, &tm); 762 strftime(buf, sizeof(buf), "%Y%m%dT%H%M%S", &tm); 763 usb_mtp_add_str(data, buf); 764 } 765 766 /* ----------------------------------------------------------------------- */ 767 768 static void usb_mtp_queue_result(MTPState *s, uint16_t code, uint32_t trans, 769 int argc, uint32_t arg0, uint32_t arg1) 770 { 771 MTPControl *c = g_new0(MTPControl, 1); 772 773 c->code = code; 774 c->trans = trans; 775 c->argc = argc; 776 if (argc > 0) { 777 c->argv[0] = arg0; 778 } 779 if (argc > 1) { 780 c->argv[1] = arg1; 781 } 782 783 assert(s->result == NULL); 784 s->result = c; 785 } 786 787 /* ----------------------------------------------------------------------- */ 788 789 static MTPData *usb_mtp_get_device_info(MTPState *s, MTPControl *c) 790 { 791 static const uint16_t ops[] = { 792 CMD_GET_DEVICE_INFO, 793 CMD_OPEN_SESSION, 794 CMD_CLOSE_SESSION, 795 CMD_GET_STORAGE_IDS, 796 CMD_GET_STORAGE_INFO, 797 CMD_GET_NUM_OBJECTS, 798 CMD_GET_OBJECT_HANDLES, 799 CMD_GET_OBJECT_INFO, 800 CMD_GET_OBJECT, 801 CMD_GET_PARTIAL_OBJECT, 802 CMD_GET_OBJECT_PROPS_SUPPORTED, 803 CMD_GET_OBJECT_PROP_DESC, 804 CMD_GET_OBJECT_PROP_VALUE, 805 }; 806 static const uint16_t fmt[] = { 807 FMT_UNDEFINED_OBJECT, 808 FMT_ASSOCIATION, 809 }; 810 MTPData *d = usb_mtp_data_alloc(c); 811 812 trace_usb_mtp_op_get_device_info(s->dev.addr); 813 814 usb_mtp_add_u16(d, 100); 815 usb_mtp_add_u32(d, 0x00000006); 816 usb_mtp_add_u16(d, 0x0064); 817 usb_mtp_add_wstr(d, L""); 818 usb_mtp_add_u16(d, 0x0000); 819 820 usb_mtp_add_u16_array(d, ARRAY_SIZE(ops), ops); 821 usb_mtp_add_u16_array(d, 0, NULL); 822 usb_mtp_add_u16_array(d, 0, NULL); 823 usb_mtp_add_u16_array(d, 0, NULL); 824 usb_mtp_add_u16_array(d, ARRAY_SIZE(fmt), fmt); 825 826 usb_mtp_add_wstr(d, L"" MTP_MANUFACTURER); 827 usb_mtp_add_wstr(d, L"" MTP_PRODUCT); 828 usb_mtp_add_wstr(d, L"0.1"); 829 usb_mtp_add_wstr(d, L"0123456789abcdef0123456789abcdef"); 830 831 return d; 832 } 833 834 static MTPData *usb_mtp_get_storage_ids(MTPState *s, MTPControl *c) 835 { 836 static const uint32_t ids[] = { 837 QEMU_STORAGE_ID, 838 }; 839 MTPData *d = usb_mtp_data_alloc(c); 840 841 trace_usb_mtp_op_get_storage_ids(s->dev.addr); 842 843 usb_mtp_add_u32_array(d, ARRAY_SIZE(ids), ids); 844 845 return d; 846 } 847 848 static MTPData *usb_mtp_get_storage_info(MTPState *s, MTPControl *c) 849 { 850 MTPData *d = usb_mtp_data_alloc(c); 851 struct statvfs buf; 852 int rc; 853 854 trace_usb_mtp_op_get_storage_info(s->dev.addr); 855 856 if (FLAG_SET(s, MTP_FLAG_WRITABLE)) { 857 usb_mtp_add_u16(d, 0x0003); 858 usb_mtp_add_u16(d, 0x0002); 859 usb_mtp_add_u16(d, 0x0000); 860 } else { 861 usb_mtp_add_u16(d, 0x0001); 862 usb_mtp_add_u16(d, 0x0002); 863 usb_mtp_add_u16(d, 0x0001); 864 } 865 866 rc = statvfs(s->root, &buf); 867 if (rc == 0) { 868 usb_mtp_add_u64(d, (uint64_t)buf.f_frsize * buf.f_blocks); 869 usb_mtp_add_u64(d, (uint64_t)buf.f_bavail * buf.f_blocks); 870 usb_mtp_add_u32(d, buf.f_ffree); 871 } else { 872 usb_mtp_add_u64(d, 0xffffffff); 873 usb_mtp_add_u64(d, 0xffffffff); 874 usb_mtp_add_u32(d, 0xffffffff); 875 } 876 877 usb_mtp_add_str(d, s->desc); 878 usb_mtp_add_wstr(d, L"123456789abcdef"); 879 return d; 880 } 881 882 static MTPData *usb_mtp_get_object_handles(MTPState *s, MTPControl *c, 883 MTPObject *o) 884 { 885 MTPData *d = usb_mtp_data_alloc(c); 886 uint32_t i = 0, handles[o->nchildren]; 887 MTPObject *iter; 888 889 trace_usb_mtp_op_get_object_handles(s->dev.addr, o->handle, o->path); 890 891 QLIST_FOREACH(iter, &o->children, list) { 892 handles[i++] = iter->handle; 893 } 894 assert(i == o->nchildren); 895 usb_mtp_add_u32_array(d, o->nchildren, handles); 896 897 return d; 898 } 899 900 static MTPData *usb_mtp_get_object_info(MTPState *s, MTPControl *c, 901 MTPObject *o) 902 { 903 MTPData *d = usb_mtp_data_alloc(c); 904 905 trace_usb_mtp_op_get_object_info(s->dev.addr, o->handle, o->path); 906 907 usb_mtp_add_u32(d, QEMU_STORAGE_ID); 908 usb_mtp_add_u16(d, o->format); 909 usb_mtp_add_u16(d, 0); 910 911 if (o->stat.st_size > 0xFFFFFFFF) { 912 usb_mtp_add_u32(d, 0xFFFFFFFF); 913 } else { 914 usb_mtp_add_u32(d, o->stat.st_size); 915 } 916 917 usb_mtp_add_u16(d, 0); 918 usb_mtp_add_u32(d, 0); 919 usb_mtp_add_u32(d, 0); 920 usb_mtp_add_u32(d, 0); 921 usb_mtp_add_u32(d, 0); 922 usb_mtp_add_u32(d, 0); 923 usb_mtp_add_u32(d, 0); 924 925 if (o->parent) { 926 usb_mtp_add_u32(d, o->parent->handle); 927 } else { 928 usb_mtp_add_u32(d, 0); 929 } 930 if (o->format == FMT_ASSOCIATION) { 931 usb_mtp_add_u16(d, 0x0001); 932 usb_mtp_add_u32(d, 0x00000001); 933 usb_mtp_add_u32(d, 0); 934 } else { 935 usb_mtp_add_u16(d, 0); 936 usb_mtp_add_u32(d, 0); 937 usb_mtp_add_u32(d, 0); 938 } 939 940 usb_mtp_add_str(d, o->name); 941 usb_mtp_add_time(d, o->stat.st_ctime); 942 usb_mtp_add_time(d, o->stat.st_mtime); 943 usb_mtp_add_wstr(d, L""); 944 945 return d; 946 } 947 948 static MTPData *usb_mtp_get_object(MTPState *s, MTPControl *c, 949 MTPObject *o) 950 { 951 MTPData *d = usb_mtp_data_alloc(c); 952 953 trace_usb_mtp_op_get_object(s->dev.addr, o->handle, o->path); 954 955 d->fd = open(o->path, O_RDONLY); 956 if (d->fd == -1) { 957 usb_mtp_data_free(d); 958 return NULL; 959 } 960 d->length = o->stat.st_size; 961 d->alloc = 512; 962 d->data = g_malloc(d->alloc); 963 return d; 964 } 965 966 static MTPData *usb_mtp_get_partial_object(MTPState *s, MTPControl *c, 967 MTPObject *o) 968 { 969 MTPData *d = usb_mtp_data_alloc(c); 970 off_t offset; 971 972 trace_usb_mtp_op_get_partial_object(s->dev.addr, o->handle, o->path, 973 c->argv[1], c->argv[2]); 974 975 d->fd = open(o->path, O_RDONLY); 976 if (d->fd == -1) { 977 usb_mtp_data_free(d); 978 return NULL; 979 } 980 981 offset = c->argv[1]; 982 if (offset > o->stat.st_size) { 983 offset = o->stat.st_size; 984 } 985 if (lseek(d->fd, offset, SEEK_SET) < 0) { 986 usb_mtp_data_free(d); 987 return NULL; 988 } 989 990 d->length = c->argv[2]; 991 if (d->length > o->stat.st_size - offset) { 992 d->length = o->stat.st_size - offset; 993 } 994 995 return d; 996 } 997 998 static MTPData *usb_mtp_get_object_props_supported(MTPState *s, MTPControl *c) 999 { 1000 static const uint16_t props[] = { 1001 PROP_STORAGE_ID, 1002 PROP_OBJECT_FORMAT, 1003 PROP_OBJECT_COMPRESSED_SIZE, 1004 PROP_PARENT_OBJECT, 1005 PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER, 1006 PROP_NAME, 1007 }; 1008 MTPData *d = usb_mtp_data_alloc(c); 1009 usb_mtp_add_u16_array(d, ARRAY_SIZE(props), props); 1010 1011 return d; 1012 } 1013 1014 static MTPData *usb_mtp_get_object_prop_desc(MTPState *s, MTPControl *c) 1015 { 1016 MTPData *d = usb_mtp_data_alloc(c); 1017 switch (c->argv[0]) { 1018 case PROP_STORAGE_ID: 1019 usb_mtp_add_u16(d, PROP_STORAGE_ID); 1020 usb_mtp_add_u16(d, DATA_TYPE_UINT32); 1021 usb_mtp_add_u8(d, 0x00); 1022 usb_mtp_add_u32(d, 0x00000000); 1023 usb_mtp_add_u32(d, 0x00000000); 1024 usb_mtp_add_u8(d, 0x00); 1025 break; 1026 case PROP_OBJECT_FORMAT: 1027 usb_mtp_add_u16(d, PROP_OBJECT_FORMAT); 1028 usb_mtp_add_u16(d, DATA_TYPE_UINT16); 1029 usb_mtp_add_u8(d, 0x00); 1030 usb_mtp_add_u16(d, 0x0000); 1031 usb_mtp_add_u32(d, 0x00000000); 1032 usb_mtp_add_u8(d, 0x00); 1033 break; 1034 case PROP_OBJECT_COMPRESSED_SIZE: 1035 usb_mtp_add_u16(d, PROP_OBJECT_COMPRESSED_SIZE); 1036 usb_mtp_add_u16(d, DATA_TYPE_UINT64); 1037 usb_mtp_add_u8(d, 0x00); 1038 usb_mtp_add_u64(d, 0x0000000000000000); 1039 usb_mtp_add_u32(d, 0x00000000); 1040 usb_mtp_add_u8(d, 0x00); 1041 break; 1042 case PROP_PARENT_OBJECT: 1043 usb_mtp_add_u16(d, PROP_PARENT_OBJECT); 1044 usb_mtp_add_u16(d, DATA_TYPE_UINT32); 1045 usb_mtp_add_u8(d, 0x00); 1046 usb_mtp_add_u32(d, 0x00000000); 1047 usb_mtp_add_u32(d, 0x00000000); 1048 usb_mtp_add_u8(d, 0x00); 1049 break; 1050 case PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER: 1051 usb_mtp_add_u16(d, PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER); 1052 usb_mtp_add_u16(d, DATA_TYPE_UINT128); 1053 usb_mtp_add_u8(d, 0x00); 1054 usb_mtp_add_u64(d, 0x0000000000000000); 1055 usb_mtp_add_u64(d, 0x0000000000000000); 1056 usb_mtp_add_u32(d, 0x00000000); 1057 usb_mtp_add_u8(d, 0x00); 1058 break; 1059 case PROP_NAME: 1060 usb_mtp_add_u16(d, PROP_NAME); 1061 usb_mtp_add_u16(d, DATA_TYPE_STRING); 1062 usb_mtp_add_u8(d, 0x00); 1063 usb_mtp_add_u8(d, 0x00); 1064 usb_mtp_add_u32(d, 0x00000000); 1065 usb_mtp_add_u8(d, 0x00); 1066 break; 1067 default: 1068 usb_mtp_data_free(d); 1069 return NULL; 1070 } 1071 1072 return d; 1073 } 1074 1075 static MTPData *usb_mtp_get_object_prop_value(MTPState *s, MTPControl *c, 1076 MTPObject *o) 1077 { 1078 MTPData *d = usb_mtp_data_alloc(c); 1079 switch (c->argv[1]) { 1080 case PROP_STORAGE_ID: 1081 usb_mtp_add_u32(d, QEMU_STORAGE_ID); 1082 break; 1083 case PROP_OBJECT_FORMAT: 1084 usb_mtp_add_u16(d, o->format); 1085 break; 1086 case PROP_OBJECT_COMPRESSED_SIZE: 1087 usb_mtp_add_u64(d, o->stat.st_size); 1088 break; 1089 case PROP_PARENT_OBJECT: 1090 if (o->parent == NULL) { 1091 usb_mtp_add_u32(d, 0x00000000); 1092 } else { 1093 usb_mtp_add_u32(d, o->parent->handle); 1094 } 1095 break; 1096 case PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER: 1097 /* Should be persistant between sessions, 1098 * but using our objedt ID is "good enough" 1099 * for now */ 1100 usb_mtp_add_u64(d, 0x0000000000000000); 1101 usb_mtp_add_u64(d, o->handle); 1102 break; 1103 case PROP_NAME: 1104 usb_mtp_add_str(d, o->name); 1105 break; 1106 default: 1107 usb_mtp_data_free(d); 1108 return NULL; 1109 } 1110 1111 return d; 1112 } 1113 1114 static void usb_mtp_command(MTPState *s, MTPControl *c) 1115 { 1116 MTPData *data_in = NULL; 1117 MTPObject *o; 1118 uint32_t nres = 0, res0 = 0; 1119 1120 /* sanity checks */ 1121 if (c->code >= CMD_CLOSE_SESSION && s->session == 0) { 1122 usb_mtp_queue_result(s, RES_SESSION_NOT_OPEN, 1123 c->trans, 0, 0, 0); 1124 return; 1125 } 1126 1127 /* process commands */ 1128 switch (c->code) { 1129 case CMD_GET_DEVICE_INFO: 1130 data_in = usb_mtp_get_device_info(s, c); 1131 break; 1132 case CMD_OPEN_SESSION: 1133 if (s->session) { 1134 usb_mtp_queue_result(s, RES_SESSION_ALREADY_OPEN, 1135 c->trans, 1, s->session, 0); 1136 return; 1137 } 1138 if (c->argv[0] == 0) { 1139 usb_mtp_queue_result(s, RES_INVALID_PARAMETER, 1140 c->trans, 0, 0, 0); 1141 return; 1142 } 1143 trace_usb_mtp_op_open_session(s->dev.addr); 1144 s->session = c->argv[0]; 1145 usb_mtp_object_alloc(s, s->next_handle++, NULL, s->root); 1146 #ifdef CONFIG_INOTIFY1 1147 if (usb_mtp_inotify_init(s)) { 1148 fprintf(stderr, "usb-mtp: file monitoring init failed\n"); 1149 } 1150 #endif 1151 break; 1152 case CMD_CLOSE_SESSION: 1153 trace_usb_mtp_op_close_session(s->dev.addr); 1154 s->session = 0; 1155 s->next_handle = 0; 1156 #ifdef CONFIG_INOTIFY1 1157 usb_mtp_inotify_cleanup(s); 1158 #endif 1159 usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects)); 1160 assert(QTAILQ_EMPTY(&s->objects)); 1161 break; 1162 case CMD_GET_STORAGE_IDS: 1163 data_in = usb_mtp_get_storage_ids(s, c); 1164 break; 1165 case CMD_GET_STORAGE_INFO: 1166 if (c->argv[0] != QEMU_STORAGE_ID && 1167 c->argv[0] != 0xffffffff) { 1168 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID, 1169 c->trans, 0, 0, 0); 1170 return; 1171 } 1172 data_in = usb_mtp_get_storage_info(s, c); 1173 break; 1174 case CMD_GET_NUM_OBJECTS: 1175 case CMD_GET_OBJECT_HANDLES: 1176 if (c->argv[0] != QEMU_STORAGE_ID && 1177 c->argv[0] != 0xffffffff) { 1178 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID, 1179 c->trans, 0, 0, 0); 1180 return; 1181 } 1182 if (c->argv[1] != 0x00000000) { 1183 usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED, 1184 c->trans, 0, 0, 0); 1185 return; 1186 } 1187 if (c->argv[2] == 0x00000000 || 1188 c->argv[2] == 0xffffffff) { 1189 o = QTAILQ_FIRST(&s->objects); 1190 } else { 1191 o = usb_mtp_object_lookup(s, c->argv[2]); 1192 } 1193 if (o == NULL) { 1194 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1195 c->trans, 0, 0, 0); 1196 return; 1197 } 1198 if (o->format != FMT_ASSOCIATION) { 1199 usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT, 1200 c->trans, 0, 0, 0); 1201 return; 1202 } 1203 usb_mtp_object_readdir(s, o); 1204 if (c->code == CMD_GET_NUM_OBJECTS) { 1205 trace_usb_mtp_op_get_num_objects(s->dev.addr, o->handle, o->path); 1206 nres = 1; 1207 res0 = o->nchildren; 1208 } else { 1209 data_in = usb_mtp_get_object_handles(s, c, o); 1210 } 1211 break; 1212 case CMD_GET_OBJECT_INFO: 1213 o = usb_mtp_object_lookup(s, c->argv[0]); 1214 if (o == NULL) { 1215 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1216 c->trans, 0, 0, 0); 1217 return; 1218 } 1219 data_in = usb_mtp_get_object_info(s, c, o); 1220 break; 1221 case CMD_GET_OBJECT: 1222 o = usb_mtp_object_lookup(s, c->argv[0]); 1223 if (o == NULL) { 1224 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1225 c->trans, 0, 0, 0); 1226 return; 1227 } 1228 if (o->format == FMT_ASSOCIATION) { 1229 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1230 c->trans, 0, 0, 0); 1231 return; 1232 } 1233 data_in = usb_mtp_get_object(s, c, o); 1234 if (data_in == NULL) { 1235 usb_mtp_queue_result(s, RES_GENERAL_ERROR, 1236 c->trans, 0, 0, 0); 1237 return; 1238 } 1239 break; 1240 case CMD_GET_PARTIAL_OBJECT: 1241 o = usb_mtp_object_lookup(s, c->argv[0]); 1242 if (o == NULL) { 1243 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1244 c->trans, 0, 0, 0); 1245 return; 1246 } 1247 if (o->format == FMT_ASSOCIATION) { 1248 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1249 c->trans, 0, 0, 0); 1250 return; 1251 } 1252 data_in = usb_mtp_get_partial_object(s, c, o); 1253 if (data_in == NULL) { 1254 usb_mtp_queue_result(s, RES_GENERAL_ERROR, 1255 c->trans, 0, 0, 0); 1256 return; 1257 } 1258 nres = 1; 1259 res0 = data_in->length; 1260 break; 1261 case CMD_GET_OBJECT_PROPS_SUPPORTED: 1262 if (c->argv[0] != FMT_UNDEFINED_OBJECT && 1263 c->argv[0] != FMT_ASSOCIATION) { 1264 usb_mtp_queue_result(s, RES_INVALID_OBJECT_FORMAT_CODE, 1265 c->trans, 0, 0, 0); 1266 return; 1267 } 1268 data_in = usb_mtp_get_object_props_supported(s, c); 1269 break; 1270 case CMD_GET_OBJECT_PROP_DESC: 1271 if (c->argv[1] != FMT_UNDEFINED_OBJECT && 1272 c->argv[1] != FMT_ASSOCIATION) { 1273 usb_mtp_queue_result(s, RES_INVALID_OBJECT_FORMAT_CODE, 1274 c->trans, 0, 0, 0); 1275 return; 1276 } 1277 data_in = usb_mtp_get_object_prop_desc(s, c); 1278 if (data_in == NULL) { 1279 usb_mtp_queue_result(s, RES_INVALID_OBJECT_PROP_CODE, 1280 c->trans, 0, 0, 0); 1281 return; 1282 } 1283 break; 1284 case CMD_GET_OBJECT_PROP_VALUE: 1285 o = usb_mtp_object_lookup(s, c->argv[0]); 1286 if (o == NULL) { 1287 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1288 c->trans, 0, 0, 0); 1289 return; 1290 } 1291 data_in = usb_mtp_get_object_prop_value(s, c, o); 1292 if (data_in == NULL) { 1293 usb_mtp_queue_result(s, RES_INVALID_OBJECT_PROP_CODE, 1294 c->trans, 0, 0, 0); 1295 return; 1296 } 1297 break; 1298 default: 1299 trace_usb_mtp_op_unknown(s->dev.addr, c->code); 1300 usb_mtp_queue_result(s, RES_OPERATION_NOT_SUPPORTED, 1301 c->trans, 0, 0, 0); 1302 return; 1303 } 1304 1305 /* return results on success */ 1306 if (data_in) { 1307 assert(s->data_in == NULL); 1308 s->data_in = data_in; 1309 } 1310 usb_mtp_queue_result(s, RES_OK, c->trans, nres, res0, 0); 1311 } 1312 1313 /* ----------------------------------------------------------------------- */ 1314 1315 static void usb_mtp_handle_reset(USBDevice *dev) 1316 { 1317 MTPState *s = USB_MTP(dev); 1318 1319 trace_usb_mtp_reset(s->dev.addr); 1320 1321 #ifdef CONFIG_INOTIFY1 1322 usb_mtp_inotify_cleanup(s); 1323 #endif 1324 usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects)); 1325 s->session = 0; 1326 usb_mtp_data_free(s->data_in); 1327 s->data_in = NULL; 1328 usb_mtp_data_free(s->data_out); 1329 s->data_out = NULL; 1330 g_free(s->result); 1331 s->result = NULL; 1332 } 1333 1334 static void usb_mtp_handle_control(USBDevice *dev, USBPacket *p, 1335 int request, int value, int index, 1336 int length, uint8_t *data) 1337 { 1338 int ret; 1339 1340 ret = usb_desc_handle_control(dev, p, request, value, index, length, data); 1341 if (ret >= 0) { 1342 return; 1343 } 1344 1345 trace_usb_mtp_stall(dev->addr, "unknown control request"); 1346 p->status = USB_RET_STALL; 1347 } 1348 1349 static void usb_mtp_cancel_packet(USBDevice *dev, USBPacket *p) 1350 { 1351 /* we don't use async packets, so this should never be called */ 1352 fprintf(stderr, "%s\n", __func__); 1353 } 1354 1355 static void usb_mtp_handle_data(USBDevice *dev, USBPacket *p) 1356 { 1357 MTPState *s = USB_MTP(dev); 1358 MTPControl cmd; 1359 mtp_container container; 1360 uint32_t params[5]; 1361 int i, rc; 1362 1363 switch (p->ep->nr) { 1364 case EP_DATA_IN: 1365 if (s->data_out != NULL) { 1366 /* guest bug */ 1367 trace_usb_mtp_stall(s->dev.addr, "awaiting data-out"); 1368 p->status = USB_RET_STALL; 1369 return; 1370 } 1371 if (p->iov.size < sizeof(container)) { 1372 trace_usb_mtp_stall(s->dev.addr, "packet too small"); 1373 p->status = USB_RET_STALL; 1374 return; 1375 } 1376 if (s->data_in != NULL) { 1377 MTPData *d = s->data_in; 1378 uint64_t dlen = d->length - d->offset; 1379 if (d->first) { 1380 trace_usb_mtp_data_in(s->dev.addr, d->trans, d->length); 1381 if (d->length + sizeof(container) > 0xFFFFFFFF) { 1382 container.length = cpu_to_le32(0xFFFFFFFF); 1383 } else { 1384 container.length = 1385 cpu_to_le32(d->length + sizeof(container)); 1386 } 1387 container.type = cpu_to_le16(TYPE_DATA); 1388 container.code = cpu_to_le16(d->code); 1389 container.trans = cpu_to_le32(d->trans); 1390 usb_packet_copy(p, &container, sizeof(container)); 1391 d->first = false; 1392 if (dlen > p->iov.size - sizeof(container)) { 1393 dlen = p->iov.size - sizeof(container); 1394 } 1395 } else { 1396 if (dlen > p->iov.size) { 1397 dlen = p->iov.size; 1398 } 1399 } 1400 if (d->fd == -1) { 1401 usb_packet_copy(p, d->data + d->offset, dlen); 1402 } else { 1403 if (d->alloc < p->iov.size) { 1404 d->alloc = p->iov.size; 1405 d->data = g_realloc(d->data, d->alloc); 1406 } 1407 rc = read(d->fd, d->data, dlen); 1408 if (rc != dlen) { 1409 memset(d->data, 0, dlen); 1410 s->result->code = RES_INCOMPLETE_TRANSFER; 1411 } 1412 usb_packet_copy(p, d->data, dlen); 1413 } 1414 d->offset += dlen; 1415 if (d->offset == d->length) { 1416 usb_mtp_data_free(s->data_in); 1417 s->data_in = NULL; 1418 } 1419 } else if (s->result != NULL) { 1420 MTPControl *r = s->result; 1421 int length = sizeof(container) + r->argc * sizeof(uint32_t); 1422 if (r->code == RES_OK) { 1423 trace_usb_mtp_success(s->dev.addr, r->trans, 1424 (r->argc > 0) ? r->argv[0] : 0, 1425 (r->argc > 1) ? r->argv[1] : 0); 1426 } else { 1427 trace_usb_mtp_error(s->dev.addr, r->code, r->trans, 1428 (r->argc > 0) ? r->argv[0] : 0, 1429 (r->argc > 1) ? r->argv[1] : 0); 1430 } 1431 container.length = cpu_to_le32(length); 1432 container.type = cpu_to_le16(TYPE_RESPONSE); 1433 container.code = cpu_to_le16(r->code); 1434 container.trans = cpu_to_le32(r->trans); 1435 for (i = 0; i < r->argc; i++) { 1436 params[i] = cpu_to_le32(r->argv[i]); 1437 } 1438 usb_packet_copy(p, &container, sizeof(container)); 1439 usb_packet_copy(p, ¶ms, length - sizeof(container)); 1440 g_free(s->result); 1441 s->result = NULL; 1442 } 1443 break; 1444 case EP_DATA_OUT: 1445 if (p->iov.size < sizeof(container)) { 1446 trace_usb_mtp_stall(s->dev.addr, "packet too small"); 1447 p->status = USB_RET_STALL; 1448 return; 1449 } 1450 usb_packet_copy(p, &container, sizeof(container)); 1451 switch (le16_to_cpu(container.type)) { 1452 case TYPE_COMMAND: 1453 if (s->data_in || s->data_out || s->result) { 1454 trace_usb_mtp_stall(s->dev.addr, "transaction inflight"); 1455 p->status = USB_RET_STALL; 1456 return; 1457 } 1458 cmd.code = le16_to_cpu(container.code); 1459 cmd.argc = (le32_to_cpu(container.length) - sizeof(container)) 1460 / sizeof(uint32_t); 1461 cmd.trans = le32_to_cpu(container.trans); 1462 if (cmd.argc > ARRAY_SIZE(cmd.argv)) { 1463 cmd.argc = ARRAY_SIZE(cmd.argv); 1464 } 1465 if (p->iov.size < sizeof(container) + cmd.argc * sizeof(uint32_t)) { 1466 trace_usb_mtp_stall(s->dev.addr, "packet too small"); 1467 p->status = USB_RET_STALL; 1468 return; 1469 } 1470 usb_packet_copy(p, ¶ms, cmd.argc * sizeof(uint32_t)); 1471 for (i = 0; i < cmd.argc; i++) { 1472 cmd.argv[i] = le32_to_cpu(params[i]); 1473 } 1474 trace_usb_mtp_command(s->dev.addr, cmd.code, cmd.trans, 1475 (cmd.argc > 0) ? cmd.argv[0] : 0, 1476 (cmd.argc > 1) ? cmd.argv[1] : 0, 1477 (cmd.argc > 2) ? cmd.argv[2] : 0, 1478 (cmd.argc > 3) ? cmd.argv[3] : 0, 1479 (cmd.argc > 4) ? cmd.argv[4] : 0); 1480 usb_mtp_command(s, &cmd); 1481 break; 1482 default: 1483 /* not needed as long as the mtp device is read-only */ 1484 p->status = USB_RET_STALL; 1485 return; 1486 } 1487 break; 1488 case EP_EVENT: 1489 #ifdef CONFIG_INOTIFY1 1490 if (!QTAILQ_EMPTY(&s->events)) { 1491 struct MTPMonEntry *e = QTAILQ_LAST(&s->events, events); 1492 uint32_t handle; 1493 int len = sizeof(container) + sizeof(uint32_t); 1494 1495 if (p->iov.size < len) { 1496 trace_usb_mtp_stall(s->dev.addr, 1497 "packet too small to send event"); 1498 p->status = USB_RET_STALL; 1499 return; 1500 } 1501 1502 QTAILQ_REMOVE(&s->events, e, next); 1503 container.length = cpu_to_le32(len); 1504 container.type = cpu_to_le32(TYPE_EVENT); 1505 container.code = cpu_to_le16(e->event); 1506 container.trans = 0; /* no trans specific events */ 1507 handle = cpu_to_le32(e->handle); 1508 usb_packet_copy(p, &container, sizeof(container)); 1509 usb_packet_copy(p, &handle, sizeof(uint32_t)); 1510 g_free(e); 1511 return; 1512 } 1513 #endif 1514 p->status = USB_RET_NAK; 1515 return; 1516 default: 1517 trace_usb_mtp_stall(s->dev.addr, "invalid endpoint"); 1518 p->status = USB_RET_STALL; 1519 return; 1520 } 1521 1522 if (p->actual_length == 0) { 1523 trace_usb_mtp_nak(s->dev.addr, p->ep->nr); 1524 p->status = USB_RET_NAK; 1525 return; 1526 } else { 1527 trace_usb_mtp_xfer(s->dev.addr, p->ep->nr, p->actual_length, 1528 p->iov.size); 1529 return; 1530 } 1531 } 1532 1533 static void usb_mtp_realize(USBDevice *dev, Error **errp) 1534 { 1535 MTPState *s = USB_MTP(dev); 1536 1537 usb_desc_create_serial(dev); 1538 usb_desc_init(dev); 1539 QTAILQ_INIT(&s->objects); 1540 if (s->desc == NULL) { 1541 if (s->root == NULL) { 1542 error_setg(errp, "usb-mtp: x-root property must be configured"); 1543 return; 1544 } 1545 s->desc = strrchr(s->root, '/'); 1546 if (s->desc && s->desc[0]) { 1547 s->desc = g_strdup(s->desc + 1); 1548 } else { 1549 s->desc = g_strdup("none"); 1550 } 1551 } 1552 } 1553 1554 static const VMStateDescription vmstate_usb_mtp = { 1555 .name = "usb-mtp", 1556 .unmigratable = 1, 1557 .version_id = 1, 1558 .minimum_version_id = 1, 1559 .fields = (VMStateField[]) { 1560 VMSTATE_USB_DEVICE(dev, MTPState), 1561 VMSTATE_END_OF_LIST() 1562 } 1563 }; 1564 1565 static Property mtp_properties[] = { 1566 DEFINE_PROP_STRING("x-root", MTPState, root), 1567 DEFINE_PROP_STRING("desc", MTPState, desc), 1568 DEFINE_PROP_END_OF_LIST(), 1569 }; 1570 1571 static void usb_mtp_class_initfn(ObjectClass *klass, void *data) 1572 { 1573 DeviceClass *dc = DEVICE_CLASS(klass); 1574 USBDeviceClass *uc = USB_DEVICE_CLASS(klass); 1575 1576 uc->realize = usb_mtp_realize; 1577 uc->product_desc = "QEMU USB MTP"; 1578 uc->usb_desc = &desc; 1579 uc->cancel_packet = usb_mtp_cancel_packet; 1580 uc->handle_attach = usb_desc_attach; 1581 uc->handle_reset = usb_mtp_handle_reset; 1582 uc->handle_control = usb_mtp_handle_control; 1583 uc->handle_data = usb_mtp_handle_data; 1584 dc->fw_name = "mtp"; 1585 dc->vmsd = &vmstate_usb_mtp; 1586 dc->props = mtp_properties; 1587 } 1588 1589 static TypeInfo mtp_info = { 1590 .name = TYPE_USB_MTP, 1591 .parent = TYPE_USB_DEVICE, 1592 .instance_size = sizeof(MTPState), 1593 .class_init = usb_mtp_class_initfn, 1594 }; 1595 1596 static void usb_mtp_register_types(void) 1597 { 1598 type_register_static(&mtp_info); 1599 } 1600 1601 type_init(usb_mtp_register_types) 1602