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 "qemu/main-loop.h" 21 #endif 22 23 #include "qemu-common.h" 24 #include "qemu/iov.h" 25 #include "trace.h" 26 #include "hw/usb.h" 27 #include "desc.h" 28 29 /* ----------------------------------------------------------------------- */ 30 31 enum mtp_container_type { 32 TYPE_COMMAND = 1, 33 TYPE_DATA = 2, 34 TYPE_RESPONSE = 3, 35 TYPE_EVENT = 4, 36 }; 37 38 enum mtp_code { 39 /* command codes */ 40 CMD_GET_DEVICE_INFO = 0x1001, 41 CMD_OPEN_SESSION = 0x1002, 42 CMD_CLOSE_SESSION = 0x1003, 43 CMD_GET_STORAGE_IDS = 0x1004, 44 CMD_GET_STORAGE_INFO = 0x1005, 45 CMD_GET_NUM_OBJECTS = 0x1006, 46 CMD_GET_OBJECT_HANDLES = 0x1007, 47 CMD_GET_OBJECT_INFO = 0x1008, 48 CMD_GET_OBJECT = 0x1009, 49 CMD_DELETE_OBJECT = 0x100b, 50 CMD_SEND_OBJECT_INFO = 0x100c, 51 CMD_SEND_OBJECT = 0x100d, 52 CMD_GET_PARTIAL_OBJECT = 0x101b, 53 CMD_GET_OBJECT_PROPS_SUPPORTED = 0x9801, 54 CMD_GET_OBJECT_PROP_DESC = 0x9802, 55 CMD_GET_OBJECT_PROP_VALUE = 0x9803, 56 57 /* response codes */ 58 RES_OK = 0x2001, 59 RES_GENERAL_ERROR = 0x2002, 60 RES_SESSION_NOT_OPEN = 0x2003, 61 RES_INVALID_TRANSACTION_ID = 0x2004, 62 RES_OPERATION_NOT_SUPPORTED = 0x2005, 63 RES_PARAMETER_NOT_SUPPORTED = 0x2006, 64 RES_INCOMPLETE_TRANSFER = 0x2007, 65 RES_INVALID_STORAGE_ID = 0x2008, 66 RES_INVALID_OBJECT_HANDLE = 0x2009, 67 RES_INVALID_OBJECT_FORMAT_CODE = 0x200b, 68 RES_STORE_FULL = 0x200c, 69 RES_STORE_READ_ONLY = 0x200e, 70 RES_PARTIAL_DELETE = 0x2012, 71 RES_STORE_NOT_AVAILABLE = 0x2013, 72 RES_SPEC_BY_FORMAT_UNSUPPORTED = 0x2014, 73 RES_INVALID_OBJECTINFO = 0x2015, 74 RES_DESTINATION_UNSUPPORTED = 0x2020, 75 RES_INVALID_PARENT_OBJECT = 0x201a, 76 RES_INVALID_PARAMETER = 0x201d, 77 RES_SESSION_ALREADY_OPEN = 0x201e, 78 RES_INVALID_OBJECT_PROP_CODE = 0xA801, 79 80 /* format codes */ 81 FMT_UNDEFINED_OBJECT = 0x3000, 82 FMT_ASSOCIATION = 0x3001, 83 84 /* event codes */ 85 EVT_CANCEL_TRANSACTION = 0x4001, 86 EVT_OBJ_ADDED = 0x4002, 87 EVT_OBJ_REMOVED = 0x4003, 88 EVT_OBJ_INFO_CHANGED = 0x4007, 89 90 /* object properties */ 91 PROP_STORAGE_ID = 0xDC01, 92 PROP_OBJECT_FORMAT = 0xDC02, 93 PROP_OBJECT_COMPRESSED_SIZE = 0xDC04, 94 PROP_PARENT_OBJECT = 0xDC0B, 95 PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER = 0xDC41, 96 PROP_NAME = 0xDC44, 97 }; 98 99 enum mtp_data_type { 100 DATA_TYPE_UINT16 = 0x0004, 101 DATA_TYPE_UINT32 = 0x0006, 102 DATA_TYPE_UINT64 = 0x0008, 103 DATA_TYPE_UINT128 = 0x000a, 104 DATA_TYPE_STRING = 0xffff, 105 }; 106 107 typedef struct { 108 uint32_t length; 109 uint16_t type; 110 uint16_t code; 111 uint32_t trans; 112 } QEMU_PACKED mtp_container; 113 114 /* ----------------------------------------------------------------------- */ 115 116 typedef struct MTPState MTPState; 117 typedef struct MTPControl MTPControl; 118 typedef struct MTPData MTPData; 119 typedef struct MTPObject MTPObject; 120 121 enum { 122 EP_DATA_IN = 1, 123 EP_DATA_OUT, 124 EP_EVENT, 125 }; 126 127 #ifdef CONFIG_INOTIFY1 128 typedef struct MTPMonEntry MTPMonEntry; 129 130 struct MTPMonEntry { 131 uint32_t event; 132 uint32_t handle; 133 134 QTAILQ_ENTRY(MTPMonEntry) next; 135 }; 136 #endif 137 138 struct MTPControl { 139 uint16_t code; 140 uint32_t trans; 141 int argc; 142 uint32_t argv[5]; 143 }; 144 145 struct MTPData { 146 uint16_t code; 147 uint32_t trans; 148 uint64_t offset; 149 uint64_t length; 150 uint64_t alloc; 151 uint8_t *data; 152 bool first; 153 /* Used for >4G file sizes */ 154 bool pending; 155 uint64_t cached_length; 156 int fd; 157 }; 158 159 struct MTPObject { 160 uint32_t handle; 161 uint16_t format; 162 char *name; 163 char *path; 164 struct stat stat; 165 #ifdef CONFIG_INOTIFY1 166 /* inotify watch cookie */ 167 int watchfd; 168 #endif 169 MTPObject *parent; 170 uint32_t nchildren; 171 QLIST_HEAD(, MTPObject) children; 172 QLIST_ENTRY(MTPObject) list; 173 bool have_children; 174 QTAILQ_ENTRY(MTPObject) next; 175 }; 176 177 struct MTPState { 178 USBDevice dev; 179 char *root; 180 char *desc; 181 uint32_t flags; 182 183 MTPData *data_in; 184 MTPData *data_out; 185 MTPControl *result; 186 uint32_t session; 187 uint32_t next_handle; 188 bool readonly; 189 190 QTAILQ_HEAD(, MTPObject) objects; 191 #ifdef CONFIG_INOTIFY1 192 /* inotify descriptor */ 193 int inotifyfd; 194 QTAILQ_HEAD(, MTPMonEntry) events; 195 #endif 196 /* Responder is expecting a write operation */ 197 bool write_pending; 198 struct { 199 uint32_t parent_handle; 200 uint16_t format; 201 uint32_t size; 202 char *filename; 203 } dataset; 204 }; 205 206 /* 207 * ObjectInfo dataset received from initiator 208 * Fields we don't care about are ignored 209 */ 210 typedef struct { 211 uint32_t storage_id; /*unused*/ 212 uint16_t format; 213 uint16_t protection_status; /*unused*/ 214 uint32_t size; 215 uint16_t thumb_format; /*unused*/ 216 uint32_t thumb_comp_sz; /*unused*/ 217 uint32_t thumb_pix_width; /*unused*/ 218 uint32_t thumb_pix_height; /*unused*/ 219 uint32_t image_pix_width; /*unused*/ 220 uint32_t image_pix_height; /*unused*/ 221 uint32_t image_bit_depth; /*unused*/ 222 uint32_t parent; /*unused*/ 223 uint16_t assoc_type; 224 uint32_t assoc_desc; 225 uint32_t seq_no; /*unused*/ 226 uint8_t length; /*part of filename field*/ 227 uint16_t filename[0]; 228 char date_created[0]; /*unused*/ 229 char date_modified[0]; /*unused*/ 230 char keywords[0]; /*unused*/ 231 /* string and other data follows */ 232 } QEMU_PACKED ObjectInfo; 233 234 #define TYPE_USB_MTP "usb-mtp" 235 #define USB_MTP(obj) OBJECT_CHECK(MTPState, (obj), TYPE_USB_MTP) 236 237 #define QEMU_STORAGE_ID 0x00010001 238 239 #define MTP_FLAG_WRITABLE 0 240 241 #define FLAG_SET(_mtp, _flag) ((_mtp)->flags & (1 << (_flag))) 242 243 /* ----------------------------------------------------------------------- */ 244 245 #define MTP_MANUFACTURER "QEMU" 246 #define MTP_PRODUCT "QEMU filesharing" 247 248 enum { 249 STR_MANUFACTURER = 1, 250 STR_PRODUCT, 251 STR_SERIALNUMBER, 252 STR_MTP, 253 STR_CONFIG_FULL, 254 STR_CONFIG_HIGH, 255 STR_CONFIG_SUPER, 256 }; 257 258 static const USBDescStrings desc_strings = { 259 [STR_MANUFACTURER] = MTP_MANUFACTURER, 260 [STR_PRODUCT] = MTP_PRODUCT, 261 [STR_SERIALNUMBER] = "34617", 262 [STR_MTP] = "MTP", 263 [STR_CONFIG_FULL] = "Full speed config (usb 1.1)", 264 [STR_CONFIG_HIGH] = "High speed config (usb 2.0)", 265 [STR_CONFIG_SUPER] = "Super speed config (usb 3.0)", 266 }; 267 268 static const USBDescIface desc_iface_full = { 269 .bInterfaceNumber = 0, 270 .bNumEndpoints = 3, 271 .bInterfaceClass = USB_CLASS_STILL_IMAGE, 272 .bInterfaceSubClass = 0x01, 273 .bInterfaceProtocol = 0x01, 274 .iInterface = STR_MTP, 275 .eps = (USBDescEndpoint[]) { 276 { 277 .bEndpointAddress = USB_DIR_IN | EP_DATA_IN, 278 .bmAttributes = USB_ENDPOINT_XFER_BULK, 279 .wMaxPacketSize = 64, 280 },{ 281 .bEndpointAddress = USB_DIR_OUT | EP_DATA_OUT, 282 .bmAttributes = USB_ENDPOINT_XFER_BULK, 283 .wMaxPacketSize = 64, 284 },{ 285 .bEndpointAddress = USB_DIR_IN | EP_EVENT, 286 .bmAttributes = USB_ENDPOINT_XFER_INT, 287 .wMaxPacketSize = 64, 288 .bInterval = 0x0a, 289 }, 290 } 291 }; 292 293 static const USBDescDevice desc_device_full = { 294 .bcdUSB = 0x0200, 295 .bMaxPacketSize0 = 8, 296 .bNumConfigurations = 1, 297 .confs = (USBDescConfig[]) { 298 { 299 .bNumInterfaces = 1, 300 .bConfigurationValue = 1, 301 .iConfiguration = STR_CONFIG_FULL, 302 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP, 303 .bMaxPower = 2, 304 .nif = 1, 305 .ifs = &desc_iface_full, 306 }, 307 }, 308 }; 309 310 static const USBDescIface desc_iface_high = { 311 .bInterfaceNumber = 0, 312 .bNumEndpoints = 3, 313 .bInterfaceClass = USB_CLASS_STILL_IMAGE, 314 .bInterfaceSubClass = 0x01, 315 .bInterfaceProtocol = 0x01, 316 .iInterface = STR_MTP, 317 .eps = (USBDescEndpoint[]) { 318 { 319 .bEndpointAddress = USB_DIR_IN | EP_DATA_IN, 320 .bmAttributes = USB_ENDPOINT_XFER_BULK, 321 .wMaxPacketSize = 512, 322 },{ 323 .bEndpointAddress = USB_DIR_OUT | EP_DATA_OUT, 324 .bmAttributes = USB_ENDPOINT_XFER_BULK, 325 .wMaxPacketSize = 512, 326 },{ 327 .bEndpointAddress = USB_DIR_IN | EP_EVENT, 328 .bmAttributes = USB_ENDPOINT_XFER_INT, 329 .wMaxPacketSize = 64, 330 .bInterval = 0x0a, 331 }, 332 } 333 }; 334 335 static const USBDescDevice desc_device_high = { 336 .bcdUSB = 0x0200, 337 .bMaxPacketSize0 = 64, 338 .bNumConfigurations = 1, 339 .confs = (USBDescConfig[]) { 340 { 341 .bNumInterfaces = 1, 342 .bConfigurationValue = 1, 343 .iConfiguration = STR_CONFIG_HIGH, 344 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP, 345 .bMaxPower = 2, 346 .nif = 1, 347 .ifs = &desc_iface_high, 348 }, 349 }, 350 }; 351 352 static const USBDescMSOS desc_msos = { 353 .CompatibleID = "MTP", 354 .SelectiveSuspendEnabled = true, 355 }; 356 357 static const USBDesc desc = { 358 .id = { 359 .idVendor = 0x46f4, /* CRC16() of "QEMU" */ 360 .idProduct = 0x0004, 361 .bcdDevice = 0, 362 .iManufacturer = STR_MANUFACTURER, 363 .iProduct = STR_PRODUCT, 364 .iSerialNumber = STR_SERIALNUMBER, 365 }, 366 .full = &desc_device_full, 367 .high = &desc_device_high, 368 .str = desc_strings, 369 .msos = &desc_msos, 370 }; 371 372 /* ----------------------------------------------------------------------- */ 373 374 static MTPObject *usb_mtp_object_alloc(MTPState *s, uint32_t handle, 375 MTPObject *parent, char *name) 376 { 377 MTPObject *o = g_new0(MTPObject, 1); 378 379 if (name[0] == '.') { 380 goto ignore; 381 } 382 383 o->handle = handle; 384 o->parent = parent; 385 o->name = g_strdup(name); 386 if (parent == NULL) { 387 o->path = g_strdup(name); 388 } else { 389 o->path = g_strdup_printf("%s/%s", parent->path, name); 390 } 391 392 if (lstat(o->path, &o->stat) != 0) { 393 goto ignore; 394 } 395 if (S_ISREG(o->stat.st_mode)) { 396 o->format = FMT_UNDEFINED_OBJECT; 397 } else if (S_ISDIR(o->stat.st_mode)) { 398 o->format = FMT_ASSOCIATION; 399 } else { 400 goto ignore; 401 } 402 403 if (access(o->path, R_OK) != 0) { 404 goto ignore; 405 } 406 407 trace_usb_mtp_object_alloc(s->dev.addr, o->handle, o->path); 408 409 QTAILQ_INSERT_TAIL(&s->objects, o, next); 410 return o; 411 412 ignore: 413 g_free(o->name); 414 g_free(o->path); 415 g_free(o); 416 return NULL; 417 } 418 419 static void usb_mtp_object_free(MTPState *s, MTPObject *o) 420 { 421 MTPObject *iter; 422 423 if (!o) { 424 return; 425 } 426 427 trace_usb_mtp_object_free(s->dev.addr, o->handle, o->path); 428 429 QTAILQ_REMOVE(&s->objects, o, next); 430 if (o->parent) { 431 QLIST_REMOVE(o, list); 432 o->parent->nchildren--; 433 } 434 435 while (!QLIST_EMPTY(&o->children)) { 436 iter = QLIST_FIRST(&o->children); 437 usb_mtp_object_free(s, iter); 438 } 439 g_free(o->name); 440 g_free(o->path); 441 g_free(o); 442 } 443 444 static MTPObject *usb_mtp_object_lookup(MTPState *s, uint32_t handle) 445 { 446 MTPObject *o; 447 448 QTAILQ_FOREACH(o, &s->objects, next) { 449 if (o->handle == handle) { 450 return o; 451 } 452 } 453 return NULL; 454 } 455 456 static MTPObject *usb_mtp_add_child(MTPState *s, MTPObject *o, 457 char *name) 458 { 459 MTPObject *child = 460 usb_mtp_object_alloc(s, s->next_handle++, o, name); 461 462 if (child) { 463 trace_usb_mtp_add_child(s->dev.addr, child->handle, child->path); 464 QLIST_INSERT_HEAD(&o->children, child, list); 465 o->nchildren++; 466 467 if (child->format == FMT_ASSOCIATION) { 468 QLIST_INIT(&child->children); 469 } 470 } 471 472 return child; 473 } 474 475 static MTPObject *usb_mtp_object_lookup_name(MTPObject *parent, 476 char *name, int len) 477 { 478 MTPObject *iter; 479 480 QLIST_FOREACH(iter, &parent->children, list) { 481 if (strncmp(iter->name, name, len) == 0) { 482 return iter; 483 } 484 } 485 486 return NULL; 487 } 488 489 #ifdef CONFIG_INOTIFY1 490 static MTPObject *usb_mtp_object_lookup_wd(MTPState *s, int wd) 491 { 492 MTPObject *iter; 493 494 QTAILQ_FOREACH(iter, &s->objects, next) { 495 if (iter->watchfd == wd) { 496 return iter; 497 } 498 } 499 500 return NULL; 501 } 502 503 static void inotify_watchfn(void *arg) 504 { 505 MTPState *s = arg; 506 ssize_t bytes; 507 /* From the man page: atleast one event can be read */ 508 int pos; 509 char buf[sizeof(struct inotify_event) + NAME_MAX + 1]; 510 511 for (;;) { 512 bytes = read(s->inotifyfd, buf, sizeof(buf)); 513 pos = 0; 514 515 if (bytes <= 0) { 516 /* Better luck next time */ 517 return; 518 } 519 520 /* 521 * TODO: Ignore initiator initiated events. 522 * For now we are good because the store is RO 523 */ 524 while (bytes > 0) { 525 char *p = buf + pos; 526 struct inotify_event *event = (struct inotify_event *)p; 527 int watchfd = 0; 528 uint32_t mask = event->mask & (IN_CREATE | IN_DELETE | 529 IN_MODIFY | IN_IGNORED); 530 MTPObject *parent = usb_mtp_object_lookup_wd(s, event->wd); 531 MTPMonEntry *entry = NULL; 532 MTPObject *o; 533 534 pos = pos + sizeof(struct inotify_event) + event->len; 535 bytes = bytes - pos; 536 537 if (!parent) { 538 continue; 539 } 540 541 switch (mask) { 542 case IN_CREATE: 543 if (usb_mtp_object_lookup_name 544 (parent, event->name, event->len)) { 545 /* Duplicate create event */ 546 continue; 547 } 548 entry = g_new0(MTPMonEntry, 1); 549 entry->handle = s->next_handle; 550 entry->event = EVT_OBJ_ADDED; 551 o = usb_mtp_add_child(s, parent, event->name); 552 if (!o) { 553 g_free(entry); 554 continue; 555 } 556 o->watchfd = watchfd; 557 trace_usb_mtp_inotify_event(s->dev.addr, event->name, 558 event->mask, "Obj Added"); 559 break; 560 561 case IN_DELETE: 562 /* 563 * The kernel issues a IN_IGNORED event 564 * when a dir containing a watchpoint is 565 * deleted, so we don't have to delete the 566 * watchpoint 567 */ 568 o = usb_mtp_object_lookup_name(parent, event->name, event->len); 569 if (!o) { 570 continue; 571 } 572 entry = g_new0(MTPMonEntry, 1); 573 entry->handle = o->handle; 574 entry->event = EVT_OBJ_REMOVED; 575 trace_usb_mtp_inotify_event(s->dev.addr, o->path, 576 event->mask, "Obj Deleted"); 577 usb_mtp_object_free(s, o); 578 break; 579 580 case IN_MODIFY: 581 o = usb_mtp_object_lookup_name(parent, event->name, event->len); 582 if (!o) { 583 continue; 584 } 585 entry = g_new0(MTPMonEntry, 1); 586 entry->handle = o->handle; 587 entry->event = EVT_OBJ_INFO_CHANGED; 588 trace_usb_mtp_inotify_event(s->dev.addr, o->path, 589 event->mask, "Obj Modified"); 590 break; 591 592 case IN_IGNORED: 593 trace_usb_mtp_inotify_event(s->dev.addr, parent->path, 594 event->mask, "Obj parent dir ignored"); 595 break; 596 597 default: 598 fprintf(stderr, "usb-mtp: failed to parse inotify event\n"); 599 continue; 600 } 601 602 if (entry) { 603 QTAILQ_INSERT_HEAD(&s->events, entry, next); 604 } 605 } 606 } 607 } 608 609 static int usb_mtp_inotify_init(MTPState *s) 610 { 611 int fd; 612 613 fd = inotify_init1(IN_NONBLOCK); 614 if (fd == -1) { 615 return 1; 616 } 617 618 QTAILQ_INIT(&s->events); 619 s->inotifyfd = fd; 620 621 qemu_set_fd_handler(fd, inotify_watchfn, NULL, s); 622 623 return 0; 624 } 625 626 static void usb_mtp_inotify_cleanup(MTPState *s) 627 { 628 MTPMonEntry *e, *p; 629 630 if (!s->inotifyfd) { 631 return; 632 } 633 634 qemu_set_fd_handler(s->inotifyfd, NULL, NULL, s); 635 close(s->inotifyfd); 636 637 QTAILQ_FOREACH_SAFE(e, &s->events, next, p) { 638 QTAILQ_REMOVE(&s->events, e, next); 639 g_free(e); 640 } 641 } 642 643 static int usb_mtp_add_watch(int inotifyfd, char *path) 644 { 645 uint32_t mask = IN_CREATE | IN_DELETE | IN_MODIFY | 646 IN_ISDIR; 647 648 return inotify_add_watch(inotifyfd, path, mask); 649 } 650 #endif 651 652 static void usb_mtp_object_readdir(MTPState *s, MTPObject *o) 653 { 654 struct dirent *entry; 655 DIR *dir; 656 int fd; 657 658 if (o->have_children) { 659 return; 660 } 661 o->have_children = true; 662 663 fd = open(o->path, O_DIRECTORY | O_CLOEXEC | O_NOFOLLOW); 664 if (fd < 0) { 665 return; 666 } 667 dir = fdopendir(fd); 668 if (!dir) { 669 return; 670 } 671 #ifdef CONFIG_INOTIFY1 672 int watchfd = usb_mtp_add_watch(s->inotifyfd, o->path); 673 if (watchfd == -1) { 674 fprintf(stderr, "usb-mtp: failed to add watch for %s\n", o->path); 675 } else { 676 trace_usb_mtp_inotify_event(s->dev.addr, o->path, 677 0, "Watch Added"); 678 o->watchfd = watchfd; 679 } 680 #endif 681 while ((entry = readdir(dir)) != NULL) { 682 usb_mtp_add_child(s, o, entry->d_name); 683 } 684 closedir(dir); 685 } 686 687 /* ----------------------------------------------------------------------- */ 688 689 static MTPData *usb_mtp_data_alloc(MTPControl *c) 690 { 691 MTPData *data = g_new0(MTPData, 1); 692 693 data->code = c->code; 694 data->trans = c->trans; 695 data->fd = -1; 696 data->first = true; 697 return data; 698 } 699 700 static void usb_mtp_data_free(MTPData *data) 701 { 702 if (data == NULL) { 703 return; 704 } 705 if (data->fd != -1) { 706 close(data->fd); 707 } 708 g_free(data->data); 709 g_free(data); 710 } 711 712 static void usb_mtp_realloc(MTPData *data, uint32_t bytes) 713 { 714 if (data->length + bytes <= data->alloc) { 715 return; 716 } 717 data->alloc = (data->length + bytes + 0xff) & ~0xff; 718 data->data = g_realloc(data->data, data->alloc); 719 } 720 721 static void usb_mtp_add_u8(MTPData *data, uint8_t val) 722 { 723 usb_mtp_realloc(data, 1); 724 data->data[data->length++] = val; 725 } 726 727 static void usb_mtp_add_u16(MTPData *data, uint16_t val) 728 { 729 usb_mtp_realloc(data, 2); 730 data->data[data->length++] = (val >> 0) & 0xff; 731 data->data[data->length++] = (val >> 8) & 0xff; 732 } 733 734 static void usb_mtp_add_u32(MTPData *data, uint32_t val) 735 { 736 usb_mtp_realloc(data, 4); 737 data->data[data->length++] = (val >> 0) & 0xff; 738 data->data[data->length++] = (val >> 8) & 0xff; 739 data->data[data->length++] = (val >> 16) & 0xff; 740 data->data[data->length++] = (val >> 24) & 0xff; 741 } 742 743 static void usb_mtp_add_u64(MTPData *data, uint64_t val) 744 { 745 usb_mtp_realloc(data, 8); 746 data->data[data->length++] = (val >> 0) & 0xff; 747 data->data[data->length++] = (val >> 8) & 0xff; 748 data->data[data->length++] = (val >> 16) & 0xff; 749 data->data[data->length++] = (val >> 24) & 0xff; 750 data->data[data->length++] = (val >> 32) & 0xff; 751 data->data[data->length++] = (val >> 40) & 0xff; 752 data->data[data->length++] = (val >> 48) & 0xff; 753 data->data[data->length++] = (val >> 56) & 0xff; 754 } 755 756 static void usb_mtp_add_u16_array(MTPData *data, uint32_t len, 757 const uint16_t *vals) 758 { 759 int i; 760 761 usb_mtp_add_u32(data, len); 762 for (i = 0; i < len; i++) { 763 usb_mtp_add_u16(data, vals[i]); 764 } 765 } 766 767 static void usb_mtp_add_u32_array(MTPData *data, uint32_t len, 768 const uint32_t *vals) 769 { 770 int i; 771 772 usb_mtp_add_u32(data, len); 773 for (i = 0; i < len; i++) { 774 usb_mtp_add_u32(data, vals[i]); 775 } 776 } 777 778 static void usb_mtp_add_wstr(MTPData *data, const wchar_t *str) 779 { 780 uint32_t len = wcslen(str); 781 int i; 782 783 if (len > 0) { 784 len++; /* include terminating L'\0' */ 785 } 786 787 usb_mtp_add_u8(data, len); 788 for (i = 0; i < len; i++) { 789 usb_mtp_add_u16(data, str[i]); 790 } 791 } 792 793 static void usb_mtp_add_str(MTPData *data, const char *str) 794 { 795 uint32_t len = strlen(str)+1; 796 wchar_t *wstr = g_new(wchar_t, len); 797 size_t ret; 798 799 ret = mbstowcs(wstr, str, len); 800 if (ret == -1) { 801 usb_mtp_add_wstr(data, L"Oops"); 802 } else { 803 usb_mtp_add_wstr(data, wstr); 804 } 805 806 g_free(wstr); 807 } 808 809 static void usb_mtp_add_time(MTPData *data, time_t time) 810 { 811 char buf[16]; 812 struct tm tm; 813 814 gmtime_r(&time, &tm); 815 strftime(buf, sizeof(buf), "%Y%m%dT%H%M%S", &tm); 816 usb_mtp_add_str(data, buf); 817 } 818 819 /* ----------------------------------------------------------------------- */ 820 821 static void usb_mtp_queue_result(MTPState *s, uint16_t code, uint32_t trans, 822 int argc, uint32_t arg0, uint32_t arg1, 823 uint32_t arg2) 824 { 825 MTPControl *c = g_new0(MTPControl, 1); 826 827 c->code = code; 828 c->trans = trans; 829 c->argc = argc; 830 if (argc > 0) { 831 c->argv[0] = arg0; 832 } 833 if (argc > 1) { 834 c->argv[1] = arg1; 835 } 836 if (argc > 2) { 837 c->argv[2] = arg2; 838 } 839 840 assert(s->result == NULL); 841 s->result = c; 842 } 843 844 /* ----------------------------------------------------------------------- */ 845 846 static MTPData *usb_mtp_get_device_info(MTPState *s, MTPControl *c) 847 { 848 static const uint16_t ops[] = { 849 CMD_GET_DEVICE_INFO, 850 CMD_OPEN_SESSION, 851 CMD_CLOSE_SESSION, 852 CMD_GET_STORAGE_IDS, 853 CMD_GET_STORAGE_INFO, 854 CMD_GET_NUM_OBJECTS, 855 CMD_GET_OBJECT_HANDLES, 856 CMD_GET_OBJECT_INFO, 857 CMD_DELETE_OBJECT, 858 CMD_SEND_OBJECT_INFO, 859 CMD_SEND_OBJECT, 860 CMD_GET_OBJECT, 861 CMD_GET_PARTIAL_OBJECT, 862 CMD_GET_OBJECT_PROPS_SUPPORTED, 863 CMD_GET_OBJECT_PROP_DESC, 864 CMD_GET_OBJECT_PROP_VALUE, 865 }; 866 static const uint16_t fmt[] = { 867 FMT_UNDEFINED_OBJECT, 868 FMT_ASSOCIATION, 869 }; 870 MTPData *d = usb_mtp_data_alloc(c); 871 872 trace_usb_mtp_op_get_device_info(s->dev.addr); 873 874 usb_mtp_add_u16(d, 100); 875 usb_mtp_add_u32(d, 0x00000006); 876 usb_mtp_add_u16(d, 0x0064); 877 usb_mtp_add_wstr(d, L""); 878 usb_mtp_add_u16(d, 0x0000); 879 880 usb_mtp_add_u16_array(d, ARRAY_SIZE(ops), ops); 881 usb_mtp_add_u16_array(d, 0, NULL); 882 usb_mtp_add_u16_array(d, 0, NULL); 883 usb_mtp_add_u16_array(d, 0, NULL); 884 usb_mtp_add_u16_array(d, ARRAY_SIZE(fmt), fmt); 885 886 usb_mtp_add_wstr(d, L"" MTP_MANUFACTURER); 887 usb_mtp_add_wstr(d, L"" MTP_PRODUCT); 888 usb_mtp_add_wstr(d, L"0.1"); 889 usb_mtp_add_wstr(d, L"0123456789abcdef0123456789abcdef"); 890 891 return d; 892 } 893 894 static MTPData *usb_mtp_get_storage_ids(MTPState *s, MTPControl *c) 895 { 896 static const uint32_t ids[] = { 897 QEMU_STORAGE_ID, 898 }; 899 MTPData *d = usb_mtp_data_alloc(c); 900 901 trace_usb_mtp_op_get_storage_ids(s->dev.addr); 902 903 usb_mtp_add_u32_array(d, ARRAY_SIZE(ids), ids); 904 905 return d; 906 } 907 908 static MTPData *usb_mtp_get_storage_info(MTPState *s, MTPControl *c) 909 { 910 MTPData *d = usb_mtp_data_alloc(c); 911 struct statvfs buf; 912 int rc; 913 914 trace_usb_mtp_op_get_storage_info(s->dev.addr); 915 916 if (FLAG_SET(s, MTP_FLAG_WRITABLE)) { 917 usb_mtp_add_u16(d, 0x0003); 918 usb_mtp_add_u16(d, 0x0002); 919 usb_mtp_add_u16(d, 0x0000); 920 } else { 921 usb_mtp_add_u16(d, 0x0001); 922 usb_mtp_add_u16(d, 0x0002); 923 usb_mtp_add_u16(d, 0x0001); 924 } 925 926 rc = statvfs(s->root, &buf); 927 if (rc == 0) { 928 usb_mtp_add_u64(d, (uint64_t)buf.f_frsize * buf.f_blocks); 929 usb_mtp_add_u64(d, (uint64_t)buf.f_bavail * buf.f_blocks); 930 usb_mtp_add_u32(d, buf.f_ffree); 931 } else { 932 usb_mtp_add_u64(d, 0xffffffff); 933 usb_mtp_add_u64(d, 0xffffffff); 934 usb_mtp_add_u32(d, 0xffffffff); 935 } 936 937 usb_mtp_add_str(d, s->desc); 938 usb_mtp_add_wstr(d, L"123456789abcdef"); 939 return d; 940 } 941 942 static MTPData *usb_mtp_get_object_handles(MTPState *s, MTPControl *c, 943 MTPObject *o) 944 { 945 MTPData *d = usb_mtp_data_alloc(c); 946 uint32_t i = 0, handles[o->nchildren]; 947 MTPObject *iter; 948 949 trace_usb_mtp_op_get_object_handles(s->dev.addr, o->handle, o->path); 950 951 QLIST_FOREACH(iter, &o->children, list) { 952 handles[i++] = iter->handle; 953 } 954 assert(i == o->nchildren); 955 usb_mtp_add_u32_array(d, o->nchildren, handles); 956 957 return d; 958 } 959 960 static MTPData *usb_mtp_get_object_info(MTPState *s, MTPControl *c, 961 MTPObject *o) 962 { 963 MTPData *d = usb_mtp_data_alloc(c); 964 965 trace_usb_mtp_op_get_object_info(s->dev.addr, o->handle, o->path); 966 967 usb_mtp_add_u32(d, QEMU_STORAGE_ID); 968 usb_mtp_add_u16(d, o->format); 969 usb_mtp_add_u16(d, 0); 970 971 if (o->stat.st_size > 0xFFFFFFFF) { 972 usb_mtp_add_u32(d, 0xFFFFFFFF); 973 } else { 974 usb_mtp_add_u32(d, o->stat.st_size); 975 } 976 977 usb_mtp_add_u16(d, 0); 978 usb_mtp_add_u32(d, 0); 979 usb_mtp_add_u32(d, 0); 980 usb_mtp_add_u32(d, 0); 981 usb_mtp_add_u32(d, 0); 982 usb_mtp_add_u32(d, 0); 983 usb_mtp_add_u32(d, 0); 984 985 if (o->parent) { 986 usb_mtp_add_u32(d, o->parent->handle); 987 } else { 988 usb_mtp_add_u32(d, 0); 989 } 990 if (o->format == FMT_ASSOCIATION) { 991 usb_mtp_add_u16(d, 0x0001); 992 usb_mtp_add_u32(d, 0x00000001); 993 usb_mtp_add_u32(d, 0); 994 } else { 995 usb_mtp_add_u16(d, 0); 996 usb_mtp_add_u32(d, 0); 997 usb_mtp_add_u32(d, 0); 998 } 999 1000 usb_mtp_add_str(d, o->name); 1001 usb_mtp_add_time(d, o->stat.st_ctime); 1002 usb_mtp_add_time(d, o->stat.st_mtime); 1003 usb_mtp_add_wstr(d, L""); 1004 1005 return d; 1006 } 1007 1008 static MTPData *usb_mtp_get_object(MTPState *s, MTPControl *c, 1009 MTPObject *o) 1010 { 1011 MTPData *d = usb_mtp_data_alloc(c); 1012 1013 trace_usb_mtp_op_get_object(s->dev.addr, o->handle, o->path); 1014 1015 d->fd = open(o->path, O_RDONLY | O_CLOEXEC | O_NOFOLLOW); 1016 if (d->fd == -1) { 1017 usb_mtp_data_free(d); 1018 return NULL; 1019 } 1020 d->length = o->stat.st_size; 1021 d->alloc = 512; 1022 d->data = g_malloc(d->alloc); 1023 return d; 1024 } 1025 1026 static MTPData *usb_mtp_get_partial_object(MTPState *s, MTPControl *c, 1027 MTPObject *o) 1028 { 1029 MTPData *d; 1030 off_t offset; 1031 1032 if (c->argc <= 2) { 1033 return NULL; 1034 } 1035 trace_usb_mtp_op_get_partial_object(s->dev.addr, o->handle, o->path, 1036 c->argv[1], c->argv[2]); 1037 1038 d = usb_mtp_data_alloc(c); 1039 d->fd = open(o->path, O_RDONLY | O_CLOEXEC | O_NOFOLLOW); 1040 if (d->fd == -1) { 1041 usb_mtp_data_free(d); 1042 return NULL; 1043 } 1044 1045 offset = c->argv[1]; 1046 if (offset > o->stat.st_size) { 1047 offset = o->stat.st_size; 1048 } 1049 if (lseek(d->fd, offset, SEEK_SET) < 0) { 1050 usb_mtp_data_free(d); 1051 return NULL; 1052 } 1053 1054 d->length = c->argv[2]; 1055 if (d->length > o->stat.st_size - offset) { 1056 d->length = o->stat.st_size - offset; 1057 } 1058 1059 return d; 1060 } 1061 1062 static MTPData *usb_mtp_get_object_props_supported(MTPState *s, MTPControl *c) 1063 { 1064 static const uint16_t props[] = { 1065 PROP_STORAGE_ID, 1066 PROP_OBJECT_FORMAT, 1067 PROP_OBJECT_COMPRESSED_SIZE, 1068 PROP_PARENT_OBJECT, 1069 PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER, 1070 PROP_NAME, 1071 }; 1072 MTPData *d = usb_mtp_data_alloc(c); 1073 usb_mtp_add_u16_array(d, ARRAY_SIZE(props), props); 1074 1075 return d; 1076 } 1077 1078 static MTPData *usb_mtp_get_object_prop_desc(MTPState *s, MTPControl *c) 1079 { 1080 MTPData *d = usb_mtp_data_alloc(c); 1081 switch (c->argv[0]) { 1082 case PROP_STORAGE_ID: 1083 usb_mtp_add_u16(d, PROP_STORAGE_ID); 1084 usb_mtp_add_u16(d, DATA_TYPE_UINT32); 1085 usb_mtp_add_u8(d, 0x00); 1086 usb_mtp_add_u32(d, 0x00000000); 1087 usb_mtp_add_u32(d, 0x00000000); 1088 usb_mtp_add_u8(d, 0x00); 1089 break; 1090 case PROP_OBJECT_FORMAT: 1091 usb_mtp_add_u16(d, PROP_OBJECT_FORMAT); 1092 usb_mtp_add_u16(d, DATA_TYPE_UINT16); 1093 usb_mtp_add_u8(d, 0x00); 1094 usb_mtp_add_u16(d, 0x0000); 1095 usb_mtp_add_u32(d, 0x00000000); 1096 usb_mtp_add_u8(d, 0x00); 1097 break; 1098 case PROP_OBJECT_COMPRESSED_SIZE: 1099 usb_mtp_add_u16(d, PROP_OBJECT_COMPRESSED_SIZE); 1100 usb_mtp_add_u16(d, DATA_TYPE_UINT64); 1101 usb_mtp_add_u8(d, 0x00); 1102 usb_mtp_add_u64(d, 0x0000000000000000); 1103 usb_mtp_add_u32(d, 0x00000000); 1104 usb_mtp_add_u8(d, 0x00); 1105 break; 1106 case PROP_PARENT_OBJECT: 1107 usb_mtp_add_u16(d, PROP_PARENT_OBJECT); 1108 usb_mtp_add_u16(d, DATA_TYPE_UINT32); 1109 usb_mtp_add_u8(d, 0x00); 1110 usb_mtp_add_u32(d, 0x00000000); 1111 usb_mtp_add_u32(d, 0x00000000); 1112 usb_mtp_add_u8(d, 0x00); 1113 break; 1114 case PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER: 1115 usb_mtp_add_u16(d, PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER); 1116 usb_mtp_add_u16(d, DATA_TYPE_UINT128); 1117 usb_mtp_add_u8(d, 0x00); 1118 usb_mtp_add_u64(d, 0x0000000000000000); 1119 usb_mtp_add_u64(d, 0x0000000000000000); 1120 usb_mtp_add_u32(d, 0x00000000); 1121 usb_mtp_add_u8(d, 0x00); 1122 break; 1123 case PROP_NAME: 1124 usb_mtp_add_u16(d, PROP_NAME); 1125 usb_mtp_add_u16(d, DATA_TYPE_STRING); 1126 usb_mtp_add_u8(d, 0x00); 1127 usb_mtp_add_u8(d, 0x00); 1128 usb_mtp_add_u32(d, 0x00000000); 1129 usb_mtp_add_u8(d, 0x00); 1130 break; 1131 default: 1132 usb_mtp_data_free(d); 1133 return NULL; 1134 } 1135 1136 return d; 1137 } 1138 1139 static MTPData *usb_mtp_get_object_prop_value(MTPState *s, MTPControl *c, 1140 MTPObject *o) 1141 { 1142 MTPData *d = usb_mtp_data_alloc(c); 1143 switch (c->argv[1]) { 1144 case PROP_STORAGE_ID: 1145 usb_mtp_add_u32(d, QEMU_STORAGE_ID); 1146 break; 1147 case PROP_OBJECT_FORMAT: 1148 usb_mtp_add_u16(d, o->format); 1149 break; 1150 case PROP_OBJECT_COMPRESSED_SIZE: 1151 usb_mtp_add_u64(d, o->stat.st_size); 1152 break; 1153 case PROP_PARENT_OBJECT: 1154 if (o->parent == NULL) { 1155 usb_mtp_add_u32(d, 0x00000000); 1156 } else { 1157 usb_mtp_add_u32(d, o->parent->handle); 1158 } 1159 break; 1160 case PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER: 1161 /* Should be persistent between sessions, 1162 * but using our objedt ID is "good enough" 1163 * for now */ 1164 usb_mtp_add_u64(d, 0x0000000000000000); 1165 usb_mtp_add_u64(d, o->handle); 1166 break; 1167 case PROP_NAME: 1168 usb_mtp_add_str(d, o->name); 1169 break; 1170 default: 1171 usb_mtp_data_free(d); 1172 return NULL; 1173 } 1174 1175 return d; 1176 } 1177 1178 /* Return correct return code for a delete event */ 1179 enum { 1180 ALL_DELETE, 1181 PARTIAL_DELETE, 1182 READ_ONLY, 1183 }; 1184 1185 /* Assumes that children, if any, have been already freed */ 1186 static void usb_mtp_object_free_one(MTPState *s, MTPObject *o) 1187 { 1188 #ifndef CONFIG_INOTIFY1 1189 assert(o->nchildren == 0); 1190 QTAILQ_REMOVE(&s->objects, o, next); 1191 g_free(o->name); 1192 g_free(o->path); 1193 g_free(o); 1194 #endif 1195 } 1196 1197 static int usb_mtp_deletefn(MTPState *s, MTPObject *o, uint32_t trans) 1198 { 1199 MTPObject *iter, *iter2; 1200 bool partial_delete = false; 1201 bool success = false; 1202 1203 /* 1204 * TODO: Add support for Protection Status 1205 */ 1206 1207 QLIST_FOREACH(iter, &o->children, list) { 1208 if (iter->format == FMT_ASSOCIATION) { 1209 QLIST_FOREACH(iter2, &iter->children, list) { 1210 usb_mtp_deletefn(s, iter2, trans); 1211 } 1212 } 1213 } 1214 1215 if (o->format == FMT_UNDEFINED_OBJECT) { 1216 if (remove(o->path)) { 1217 partial_delete = true; 1218 } else { 1219 usb_mtp_object_free_one(s, o); 1220 success = true; 1221 } 1222 } 1223 1224 if (o->format == FMT_ASSOCIATION) { 1225 if (rmdir(o->path)) { 1226 partial_delete = true; 1227 } else { 1228 usb_mtp_object_free_one(s, o); 1229 success = true; 1230 } 1231 } 1232 1233 if (success && partial_delete) { 1234 return PARTIAL_DELETE; 1235 } 1236 if (!success && partial_delete) { 1237 return READ_ONLY; 1238 } 1239 return ALL_DELETE; 1240 } 1241 1242 static void usb_mtp_object_delete(MTPState *s, uint32_t handle, 1243 uint32_t format_code, uint32_t trans) 1244 { 1245 MTPObject *o; 1246 int ret; 1247 1248 /* Return error if store is read-only */ 1249 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) { 1250 usb_mtp_queue_result(s, RES_STORE_READ_ONLY, 1251 trans, 0, 0, 0, 0); 1252 return; 1253 } 1254 1255 if (format_code != 0) { 1256 usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED, 1257 trans, 0, 0, 0, 0); 1258 return; 1259 } 1260 1261 if (handle == 0xFFFFFFF) { 1262 o = QTAILQ_FIRST(&s->objects); 1263 } else { 1264 o = usb_mtp_object_lookup(s, handle); 1265 } 1266 if (o == NULL) { 1267 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1268 trans, 0, 0, 0, 0); 1269 return; 1270 } 1271 1272 ret = usb_mtp_deletefn(s, o, trans); 1273 if (ret == PARTIAL_DELETE) { 1274 usb_mtp_queue_result(s, RES_PARTIAL_DELETE, 1275 trans, 0, 0, 0, 0); 1276 return; 1277 } else if (ret == READ_ONLY) { 1278 usb_mtp_queue_result(s, RES_STORE_READ_ONLY, trans, 1279 0, 0, 0, 0); 1280 return; 1281 } else { 1282 usb_mtp_queue_result(s, RES_OK, trans, 1283 0, 0, 0, 0); 1284 return; 1285 } 1286 } 1287 1288 static void usb_mtp_command(MTPState *s, MTPControl *c) 1289 { 1290 MTPData *data_in = NULL; 1291 MTPObject *o = NULL; 1292 uint32_t nres = 0, res0 = 0; 1293 1294 /* sanity checks */ 1295 if (c->code >= CMD_CLOSE_SESSION && s->session == 0) { 1296 usb_mtp_queue_result(s, RES_SESSION_NOT_OPEN, 1297 c->trans, 0, 0, 0, 0); 1298 return; 1299 } 1300 1301 /* process commands */ 1302 switch (c->code) { 1303 case CMD_GET_DEVICE_INFO: 1304 data_in = usb_mtp_get_device_info(s, c); 1305 break; 1306 case CMD_OPEN_SESSION: 1307 if (s->session) { 1308 usb_mtp_queue_result(s, RES_SESSION_ALREADY_OPEN, 1309 c->trans, 1, s->session, 0, 0); 1310 return; 1311 } 1312 if (c->argv[0] == 0) { 1313 usb_mtp_queue_result(s, RES_INVALID_PARAMETER, 1314 c->trans, 0, 0, 0, 0); 1315 return; 1316 } 1317 trace_usb_mtp_op_open_session(s->dev.addr); 1318 s->session = c->argv[0]; 1319 usb_mtp_object_alloc(s, s->next_handle++, NULL, s->root); 1320 #ifdef CONFIG_INOTIFY1 1321 if (usb_mtp_inotify_init(s)) { 1322 fprintf(stderr, "usb-mtp: file monitoring init failed\n"); 1323 } 1324 #endif 1325 break; 1326 case CMD_CLOSE_SESSION: 1327 trace_usb_mtp_op_close_session(s->dev.addr); 1328 s->session = 0; 1329 s->next_handle = 0; 1330 #ifdef CONFIG_INOTIFY1 1331 usb_mtp_inotify_cleanup(s); 1332 #endif 1333 usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects)); 1334 assert(QTAILQ_EMPTY(&s->objects)); 1335 break; 1336 case CMD_GET_STORAGE_IDS: 1337 data_in = usb_mtp_get_storage_ids(s, c); 1338 break; 1339 case CMD_GET_STORAGE_INFO: 1340 if (c->argv[0] != QEMU_STORAGE_ID && 1341 c->argv[0] != 0xffffffff) { 1342 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID, 1343 c->trans, 0, 0, 0, 0); 1344 return; 1345 } 1346 data_in = usb_mtp_get_storage_info(s, c); 1347 break; 1348 case CMD_GET_NUM_OBJECTS: 1349 case CMD_GET_OBJECT_HANDLES: 1350 if (c->argv[0] != QEMU_STORAGE_ID && 1351 c->argv[0] != 0xffffffff) { 1352 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID, 1353 c->trans, 0, 0, 0, 0); 1354 return; 1355 } 1356 if (c->argv[1] != 0x00000000) { 1357 usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED, 1358 c->trans, 0, 0, 0, 0); 1359 return; 1360 } 1361 if (c->argv[2] == 0x00000000 || 1362 c->argv[2] == 0xffffffff) { 1363 o = QTAILQ_FIRST(&s->objects); 1364 } else { 1365 o = usb_mtp_object_lookup(s, c->argv[2]); 1366 } 1367 if (o == NULL) { 1368 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1369 c->trans, 0, 0, 0, 0); 1370 return; 1371 } 1372 if (o->format != FMT_ASSOCIATION) { 1373 usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT, 1374 c->trans, 0, 0, 0, 0); 1375 return; 1376 } 1377 usb_mtp_object_readdir(s, o); 1378 if (c->code == CMD_GET_NUM_OBJECTS) { 1379 trace_usb_mtp_op_get_num_objects(s->dev.addr, o->handle, o->path); 1380 nres = 1; 1381 res0 = o->nchildren; 1382 } else { 1383 data_in = usb_mtp_get_object_handles(s, c, o); 1384 } 1385 break; 1386 case CMD_GET_OBJECT_INFO: 1387 o = usb_mtp_object_lookup(s, c->argv[0]); 1388 if (o == NULL) { 1389 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1390 c->trans, 0, 0, 0, 0); 1391 return; 1392 } 1393 data_in = usb_mtp_get_object_info(s, c, o); 1394 break; 1395 case CMD_GET_OBJECT: 1396 o = usb_mtp_object_lookup(s, c->argv[0]); 1397 if (o == NULL) { 1398 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1399 c->trans, 0, 0, 0, 0); 1400 return; 1401 } 1402 if (o->format == FMT_ASSOCIATION) { 1403 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1404 c->trans, 0, 0, 0, 0); 1405 return; 1406 } 1407 data_in = usb_mtp_get_object(s, c, o); 1408 if (data_in == NULL) { 1409 usb_mtp_queue_result(s, RES_GENERAL_ERROR, 1410 c->trans, 0, 0, 0, 0); 1411 return; 1412 } 1413 break; 1414 case CMD_DELETE_OBJECT: 1415 usb_mtp_object_delete(s, c->argv[0], c->argv[1], c->trans); 1416 return; 1417 case CMD_GET_PARTIAL_OBJECT: 1418 o = usb_mtp_object_lookup(s, c->argv[0]); 1419 if (o == NULL) { 1420 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1421 c->trans, 0, 0, 0, 0); 1422 return; 1423 } 1424 if (o->format == FMT_ASSOCIATION) { 1425 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1426 c->trans, 0, 0, 0, 0); 1427 return; 1428 } 1429 data_in = usb_mtp_get_partial_object(s, c, o); 1430 if (data_in == NULL) { 1431 usb_mtp_queue_result(s, RES_GENERAL_ERROR, 1432 c->trans, 0, 0, 0, 0); 1433 return; 1434 } 1435 nres = 1; 1436 res0 = data_in->length; 1437 break; 1438 case CMD_SEND_OBJECT_INFO: 1439 /* Return error if store is read-only */ 1440 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) { 1441 usb_mtp_queue_result(s, RES_STORE_READ_ONLY, 1442 c->trans, 0, 0, 0, 0); 1443 } else if (c->argv[0] && (c->argv[0] != QEMU_STORAGE_ID)) { 1444 /* First parameter points to storage id or is 0 */ 1445 usb_mtp_queue_result(s, RES_STORE_NOT_AVAILABLE, c->trans, 1446 0, 0, 0, 0); 1447 } else if (c->argv[1] && !c->argv[0]) { 1448 /* If second parameter is specified, first must also be specified */ 1449 usb_mtp_queue_result(s, RES_DESTINATION_UNSUPPORTED, c->trans, 1450 0, 0, 0, 0); 1451 } else { 1452 uint32_t handle = c->argv[1]; 1453 if (handle == 0xFFFFFFFF || handle == 0) { 1454 /* root object */ 1455 o = QTAILQ_FIRST(&s->objects); 1456 } else { 1457 o = usb_mtp_object_lookup(s, handle); 1458 } 1459 if (o == NULL) { 1460 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, c->trans, 1461 0, 0, 0, 0); 1462 } else if (o->format != FMT_ASSOCIATION) { 1463 usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT, c->trans, 1464 0, 0, 0, 0); 1465 } 1466 } 1467 if (o) { 1468 s->dataset.parent_handle = o->handle; 1469 } 1470 s->data_out = usb_mtp_data_alloc(c); 1471 return; 1472 case CMD_SEND_OBJECT: 1473 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) { 1474 usb_mtp_queue_result(s, RES_STORE_READ_ONLY, 1475 c->trans, 0, 0, 0, 0); 1476 return; 1477 } 1478 if (!s->write_pending) { 1479 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, 1480 c->trans, 0, 0, 0, 0); 1481 return; 1482 } 1483 s->data_out = usb_mtp_data_alloc(c); 1484 return; 1485 case CMD_GET_OBJECT_PROPS_SUPPORTED: 1486 if (c->argv[0] != FMT_UNDEFINED_OBJECT && 1487 c->argv[0] != FMT_ASSOCIATION) { 1488 usb_mtp_queue_result(s, RES_INVALID_OBJECT_FORMAT_CODE, 1489 c->trans, 0, 0, 0, 0); 1490 return; 1491 } 1492 data_in = usb_mtp_get_object_props_supported(s, c); 1493 break; 1494 case CMD_GET_OBJECT_PROP_DESC: 1495 if (c->argv[1] != FMT_UNDEFINED_OBJECT && 1496 c->argv[1] != FMT_ASSOCIATION) { 1497 usb_mtp_queue_result(s, RES_INVALID_OBJECT_FORMAT_CODE, 1498 c->trans, 0, 0, 0, 0); 1499 return; 1500 } 1501 data_in = usb_mtp_get_object_prop_desc(s, c); 1502 if (data_in == NULL) { 1503 usb_mtp_queue_result(s, RES_INVALID_OBJECT_PROP_CODE, 1504 c->trans, 0, 0, 0, 0); 1505 return; 1506 } 1507 break; 1508 case CMD_GET_OBJECT_PROP_VALUE: 1509 o = usb_mtp_object_lookup(s, c->argv[0]); 1510 if (o == NULL) { 1511 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1512 c->trans, 0, 0, 0, 0); 1513 return; 1514 } 1515 data_in = usb_mtp_get_object_prop_value(s, c, o); 1516 if (data_in == NULL) { 1517 usb_mtp_queue_result(s, RES_INVALID_OBJECT_PROP_CODE, 1518 c->trans, 0, 0, 0, 0); 1519 return; 1520 } 1521 break; 1522 default: 1523 trace_usb_mtp_op_unknown(s->dev.addr, c->code); 1524 usb_mtp_queue_result(s, RES_OPERATION_NOT_SUPPORTED, 1525 c->trans, 0, 0, 0, 0); 1526 return; 1527 } 1528 1529 /* return results on success */ 1530 if (data_in) { 1531 assert(s->data_in == NULL); 1532 s->data_in = data_in; 1533 } 1534 usb_mtp_queue_result(s, RES_OK, c->trans, nres, res0, 0, 0); 1535 } 1536 1537 /* ----------------------------------------------------------------------- */ 1538 1539 static void usb_mtp_handle_reset(USBDevice *dev) 1540 { 1541 MTPState *s = USB_MTP(dev); 1542 1543 trace_usb_mtp_reset(s->dev.addr); 1544 1545 #ifdef CONFIG_INOTIFY1 1546 usb_mtp_inotify_cleanup(s); 1547 #endif 1548 usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects)); 1549 s->session = 0; 1550 usb_mtp_data_free(s->data_in); 1551 s->data_in = NULL; 1552 usb_mtp_data_free(s->data_out); 1553 s->data_out = NULL; 1554 g_free(s->result); 1555 s->result = NULL; 1556 } 1557 1558 static void usb_mtp_handle_control(USBDevice *dev, USBPacket *p, 1559 int request, int value, int index, 1560 int length, uint8_t *data) 1561 { 1562 int ret; 1563 MTPState *s = USB_MTP(dev); 1564 uint16_t *event = (uint16_t *)data; 1565 1566 switch (request) { 1567 case ClassInterfaceOutRequest | 0x64: 1568 if (*event == EVT_CANCEL_TRANSACTION) { 1569 g_free(s->result); 1570 s->result = NULL; 1571 usb_mtp_data_free(s->data_in); 1572 s->data_in = NULL; 1573 if (s->write_pending) { 1574 g_free(s->dataset.filename); 1575 s->write_pending = false; 1576 s->dataset.size = 0; 1577 } 1578 usb_mtp_data_free(s->data_out); 1579 s->data_out = NULL; 1580 } else { 1581 p->status = USB_RET_STALL; 1582 } 1583 break; 1584 default: 1585 ret = usb_desc_handle_control(dev, p, request, 1586 value, index, length, data); 1587 if (ret >= 0) { 1588 return; 1589 } 1590 } 1591 1592 trace_usb_mtp_stall(dev->addr, "unknown control request"); 1593 } 1594 1595 static void usb_mtp_cancel_packet(USBDevice *dev, USBPacket *p) 1596 { 1597 /* we don't use async packets, so this should never be called */ 1598 fprintf(stderr, "%s\n", __func__); 1599 } 1600 1601 static char *utf16_to_str(uint8_t len, uint16_t *arr) 1602 { 1603 wchar_t *wstr = g_new0(wchar_t, len + 1); 1604 int count, dlen; 1605 char *dest; 1606 1607 for (count = 0; count < len; count++) { 1608 /* FIXME: not working for surrogate pairs */ 1609 wstr[count] = (wchar_t)arr[count]; 1610 } 1611 wstr[count] = 0; 1612 1613 dlen = wcstombs(NULL, wstr, 0) + 1; 1614 dest = g_malloc(dlen); 1615 wcstombs(dest, wstr, dlen); 1616 g_free(wstr); 1617 return dest; 1618 } 1619 1620 /* Wrapper around write, returns 0 on failure */ 1621 static uint64_t write_retry(int fd, void *buf, uint64_t size) 1622 { 1623 uint64_t bytes_left = size, ret; 1624 1625 while (bytes_left > 0) { 1626 ret = write(fd, buf, bytes_left); 1627 if ((ret == -1) && (errno != EINTR || errno != EAGAIN || 1628 errno != EWOULDBLOCK)) { 1629 break; 1630 } 1631 bytes_left -= ret; 1632 buf += ret; 1633 } 1634 1635 return size - bytes_left; 1636 } 1637 1638 static void usb_mtp_write_data(MTPState *s) 1639 { 1640 MTPData *d = s->data_out; 1641 MTPObject *parent = 1642 usb_mtp_object_lookup(s, s->dataset.parent_handle); 1643 char *path = NULL; 1644 uint64_t rc; 1645 mode_t mask = 0644; 1646 1647 assert(d != NULL); 1648 1649 if (parent == NULL || !s->write_pending) { 1650 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, d->trans, 1651 0, 0, 0, 0); 1652 return; 1653 } 1654 1655 if (s->dataset.filename) { 1656 path = g_strdup_printf("%s/%s", parent->path, s->dataset.filename); 1657 if (s->dataset.format == FMT_ASSOCIATION) { 1658 d->fd = mkdir(path, mask); 1659 goto free; 1660 } 1661 if ((s->dataset.size != 0xFFFFFFFF) && (s->dataset.size < d->length)) { 1662 usb_mtp_queue_result(s, RES_STORE_FULL, d->trans, 1663 0, 0, 0, 0); 1664 goto done; 1665 } 1666 d->fd = open(path, O_CREAT | O_WRONLY | O_CLOEXEC | O_NOFOLLOW, mask); 1667 if (d->fd == -1) { 1668 usb_mtp_queue_result(s, RES_STORE_FULL, d->trans, 1669 0, 0, 0, 0); 1670 goto done; 1671 } 1672 1673 /* 1674 * Return success if initiator sent 0 sized data 1675 */ 1676 if (!s->dataset.size) { 1677 goto success; 1678 } 1679 1680 rc = write_retry(d->fd, d->data, d->offset); 1681 if (rc != d->offset) { 1682 usb_mtp_queue_result(s, RES_STORE_FULL, d->trans, 1683 0, 0, 0, 0); 1684 goto done; 1685 } 1686 /* Only for < 4G file sizes */ 1687 if (s->dataset.size != 0xFFFFFFFF && rc != s->dataset.size) { 1688 usb_mtp_queue_result(s, RES_INCOMPLETE_TRANSFER, d->trans, 1689 0, 0, 0, 0); 1690 goto done; 1691 } 1692 } 1693 1694 success: 1695 usb_mtp_queue_result(s, RES_OK, d->trans, 1696 0, 0, 0, 0); 1697 1698 done: 1699 /* 1700 * The write dataset is kept around and freed only 1701 * on success or if another write request comes in 1702 */ 1703 if (d->fd != -1) { 1704 close(d->fd); 1705 } 1706 free: 1707 g_free(s->dataset.filename); 1708 s->dataset.size = 0; 1709 g_free(path); 1710 s->write_pending = false; 1711 } 1712 1713 static void usb_mtp_write_metadata(MTPState *s, uint64_t dlen) 1714 { 1715 MTPData *d = s->data_out; 1716 ObjectInfo *dataset = (ObjectInfo *)d->data; 1717 char *filename; 1718 MTPObject *o; 1719 MTPObject *p = usb_mtp_object_lookup(s, s->dataset.parent_handle); 1720 uint32_t next_handle = s->next_handle; 1721 1722 assert(!s->write_pending); 1723 assert(p != NULL); 1724 1725 filename = utf16_to_str(MIN(dataset->length, 1726 dlen - offsetof(ObjectInfo, filename)), 1727 dataset->filename); 1728 1729 if (strchr(filename, '/')) { 1730 usb_mtp_queue_result(s, RES_PARAMETER_NOT_SUPPORTED, d->trans, 1731 0, 0, 0, 0); 1732 g_free(filename); 1733 return; 1734 } 1735 1736 o = usb_mtp_object_lookup_name(p, filename, dataset->length); 1737 if (o != NULL) { 1738 next_handle = o->handle; 1739 } 1740 1741 s->dataset.filename = filename; 1742 s->dataset.format = dataset->format; 1743 s->dataset.size = dataset->size; 1744 s->write_pending = true; 1745 1746 if (s->dataset.format == FMT_ASSOCIATION) { 1747 usb_mtp_write_data(s); 1748 /* next_handle will be allocated to the newly created dir */ 1749 if (d->fd == -1) { 1750 usb_mtp_queue_result(s, RES_STORE_FULL, d->trans, 1751 0, 0, 0, 0); 1752 return; 1753 } 1754 d->fd = -1; 1755 } 1756 1757 usb_mtp_queue_result(s, RES_OK, d->trans, 3, QEMU_STORAGE_ID, 1758 s->dataset.parent_handle, next_handle); 1759 } 1760 1761 static void usb_mtp_get_data(MTPState *s, mtp_container *container, 1762 USBPacket *p) 1763 { 1764 MTPData *d = s->data_out; 1765 uint64_t dlen; 1766 uint32_t data_len = p->iov.size; 1767 uint64_t total_len; 1768 1769 if (!d) { 1770 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, 0, 1771 0, 0, 0, 0); 1772 return; 1773 } 1774 if (d->first) { 1775 /* Total length of incoming data */ 1776 total_len = cpu_to_le32(container->length) - sizeof(mtp_container); 1777 /* Length of data in this packet */ 1778 data_len -= sizeof(mtp_container); 1779 usb_mtp_realloc(d, total_len); 1780 d->length += total_len; 1781 d->offset = 0; 1782 d->cached_length = total_len; 1783 d->first = false; 1784 d->pending = false; 1785 } 1786 1787 if (d->pending) { 1788 usb_mtp_realloc(d, d->cached_length); 1789 d->length += d->cached_length; 1790 d->pending = false; 1791 } 1792 1793 if (d->length - d->offset > data_len) { 1794 dlen = data_len; 1795 } else { 1796 dlen = d->length - d->offset; 1797 /* Check for cached data for large files */ 1798 if ((s->dataset.size == 0xFFFFFFFF) && (dlen < p->iov.size)) { 1799 usb_mtp_realloc(d, p->iov.size - dlen); 1800 d->length += p->iov.size - dlen; 1801 dlen = p->iov.size; 1802 } 1803 } 1804 1805 switch (d->code) { 1806 case CMD_SEND_OBJECT_INFO: 1807 usb_packet_copy(p, d->data + d->offset, dlen); 1808 d->offset += dlen; 1809 if (d->offset == d->length) { 1810 /* The operation might have already failed */ 1811 if (!s->result) { 1812 usb_mtp_write_metadata(s, dlen); 1813 } 1814 usb_mtp_data_free(s->data_out); 1815 s->data_out = NULL; 1816 return; 1817 } 1818 break; 1819 case CMD_SEND_OBJECT: 1820 usb_packet_copy(p, d->data + d->offset, dlen); 1821 d->offset += dlen; 1822 if ((p->iov.size % 64) || !p->iov.size) { 1823 assert((s->dataset.size == 0xFFFFFFFF) || 1824 (s->dataset.size == d->length)); 1825 1826 usb_mtp_write_data(s); 1827 usb_mtp_data_free(s->data_out); 1828 s->data_out = NULL; 1829 return; 1830 } 1831 if (d->offset == d->length) { 1832 d->pending = true; 1833 } 1834 break; 1835 default: 1836 p->status = USB_RET_STALL; 1837 return; 1838 } 1839 } 1840 1841 static void usb_mtp_handle_data(USBDevice *dev, USBPacket *p) 1842 { 1843 MTPState *s = USB_MTP(dev); 1844 MTPControl cmd; 1845 mtp_container container; 1846 uint32_t params[5]; 1847 uint16_t container_type; 1848 int i, rc; 1849 1850 switch (p->ep->nr) { 1851 case EP_DATA_IN: 1852 if (s->data_out != NULL) { 1853 /* guest bug */ 1854 trace_usb_mtp_stall(s->dev.addr, "awaiting data-out"); 1855 p->status = USB_RET_STALL; 1856 return; 1857 } 1858 if (p->iov.size < sizeof(container)) { 1859 trace_usb_mtp_stall(s->dev.addr, "packet too small"); 1860 p->status = USB_RET_STALL; 1861 return; 1862 } 1863 if (s->data_in != NULL) { 1864 MTPData *d = s->data_in; 1865 uint64_t dlen = d->length - d->offset; 1866 if (d->first) { 1867 trace_usb_mtp_data_in(s->dev.addr, d->trans, d->length); 1868 if (d->length + sizeof(container) > 0xFFFFFFFF) { 1869 container.length = cpu_to_le32(0xFFFFFFFF); 1870 } else { 1871 container.length = 1872 cpu_to_le32(d->length + sizeof(container)); 1873 } 1874 container.type = cpu_to_le16(TYPE_DATA); 1875 container.code = cpu_to_le16(d->code); 1876 container.trans = cpu_to_le32(d->trans); 1877 usb_packet_copy(p, &container, sizeof(container)); 1878 d->first = false; 1879 if (dlen > p->iov.size - sizeof(container)) { 1880 dlen = p->iov.size - sizeof(container); 1881 } 1882 } else { 1883 if (dlen > p->iov.size) { 1884 dlen = p->iov.size; 1885 } 1886 } 1887 if (d->fd == -1) { 1888 usb_packet_copy(p, d->data + d->offset, dlen); 1889 } else { 1890 if (d->alloc < p->iov.size) { 1891 d->alloc = p->iov.size; 1892 d->data = g_realloc(d->data, d->alloc); 1893 } 1894 rc = read(d->fd, d->data, dlen); 1895 if (rc != dlen) { 1896 memset(d->data, 0, dlen); 1897 s->result->code = RES_INCOMPLETE_TRANSFER; 1898 } 1899 usb_packet_copy(p, d->data, dlen); 1900 } 1901 d->offset += dlen; 1902 if (d->offset == d->length) { 1903 usb_mtp_data_free(s->data_in); 1904 s->data_in = NULL; 1905 } 1906 } else if (s->result != NULL) { 1907 MTPControl *r = s->result; 1908 int length = sizeof(container) + r->argc * sizeof(uint32_t); 1909 if (r->code == RES_OK) { 1910 trace_usb_mtp_success(s->dev.addr, r->trans, 1911 (r->argc > 0) ? r->argv[0] : 0, 1912 (r->argc > 1) ? r->argv[1] : 0); 1913 } else { 1914 trace_usb_mtp_error(s->dev.addr, r->code, r->trans, 1915 (r->argc > 0) ? r->argv[0] : 0, 1916 (r->argc > 1) ? r->argv[1] : 0); 1917 } 1918 container.length = cpu_to_le32(length); 1919 container.type = cpu_to_le16(TYPE_RESPONSE); 1920 container.code = cpu_to_le16(r->code); 1921 container.trans = cpu_to_le32(r->trans); 1922 for (i = 0; i < r->argc; i++) { 1923 params[i] = cpu_to_le32(r->argv[i]); 1924 } 1925 usb_packet_copy(p, &container, sizeof(container)); 1926 usb_packet_copy(p, ¶ms, length - sizeof(container)); 1927 g_free(s->result); 1928 s->result = NULL; 1929 } 1930 break; 1931 case EP_DATA_OUT: 1932 if (p->iov.size < sizeof(container)) { 1933 trace_usb_mtp_stall(s->dev.addr, "packet too small"); 1934 p->status = USB_RET_STALL; 1935 return; 1936 } 1937 if ((s->data_out != NULL) && !s->data_out->first) { 1938 container_type = TYPE_DATA; 1939 } else { 1940 usb_packet_copy(p, &container, sizeof(container)); 1941 container_type = le16_to_cpu(container.type); 1942 } 1943 switch (container_type) { 1944 case TYPE_COMMAND: 1945 if (s->data_in || s->data_out || s->result) { 1946 trace_usb_mtp_stall(s->dev.addr, "transaction inflight"); 1947 p->status = USB_RET_STALL; 1948 return; 1949 } 1950 cmd.code = le16_to_cpu(container.code); 1951 cmd.argc = (le32_to_cpu(container.length) - sizeof(container)) 1952 / sizeof(uint32_t); 1953 cmd.trans = le32_to_cpu(container.trans); 1954 if (cmd.argc > ARRAY_SIZE(cmd.argv)) { 1955 cmd.argc = ARRAY_SIZE(cmd.argv); 1956 } 1957 if (p->iov.size < sizeof(container) + cmd.argc * sizeof(uint32_t)) { 1958 trace_usb_mtp_stall(s->dev.addr, "packet too small"); 1959 p->status = USB_RET_STALL; 1960 return; 1961 } 1962 usb_packet_copy(p, ¶ms, cmd.argc * sizeof(uint32_t)); 1963 for (i = 0; i < cmd.argc; i++) { 1964 cmd.argv[i] = le32_to_cpu(params[i]); 1965 } 1966 trace_usb_mtp_command(s->dev.addr, cmd.code, cmd.trans, 1967 (cmd.argc > 0) ? cmd.argv[0] : 0, 1968 (cmd.argc > 1) ? cmd.argv[1] : 0, 1969 (cmd.argc > 2) ? cmd.argv[2] : 0, 1970 (cmd.argc > 3) ? cmd.argv[3] : 0, 1971 (cmd.argc > 4) ? cmd.argv[4] : 0); 1972 usb_mtp_command(s, &cmd); 1973 break; 1974 case TYPE_DATA: 1975 /* One of the previous transfers has already errored but the 1976 * responder is still sending data associated with it 1977 */ 1978 if (s->result != NULL) { 1979 return; 1980 } 1981 usb_mtp_get_data(s, &container, p); 1982 break; 1983 default: 1984 /* not needed as long as the mtp device is read-only */ 1985 p->status = USB_RET_STALL; 1986 return; 1987 } 1988 break; 1989 case EP_EVENT: 1990 #ifdef CONFIG_INOTIFY1 1991 if (!QTAILQ_EMPTY(&s->events)) { 1992 struct MTPMonEntry *e = QTAILQ_LAST(&s->events); 1993 uint32_t handle; 1994 int len = sizeof(container) + sizeof(uint32_t); 1995 1996 if (p->iov.size < len) { 1997 trace_usb_mtp_stall(s->dev.addr, 1998 "packet too small to send event"); 1999 p->status = USB_RET_STALL; 2000 return; 2001 } 2002 2003 QTAILQ_REMOVE(&s->events, e, next); 2004 container.length = cpu_to_le32(len); 2005 container.type = cpu_to_le32(TYPE_EVENT); 2006 container.code = cpu_to_le16(e->event); 2007 container.trans = 0; /* no trans specific events */ 2008 handle = cpu_to_le32(e->handle); 2009 usb_packet_copy(p, &container, sizeof(container)); 2010 usb_packet_copy(p, &handle, sizeof(uint32_t)); 2011 g_free(e); 2012 return; 2013 } 2014 #endif 2015 p->status = USB_RET_NAK; 2016 return; 2017 default: 2018 trace_usb_mtp_stall(s->dev.addr, "invalid endpoint"); 2019 p->status = USB_RET_STALL; 2020 return; 2021 } 2022 2023 if (p->actual_length == 0) { 2024 trace_usb_mtp_nak(s->dev.addr, p->ep->nr); 2025 p->status = USB_RET_NAK; 2026 return; 2027 } else { 2028 trace_usb_mtp_xfer(s->dev.addr, p->ep->nr, p->actual_length, 2029 p->iov.size); 2030 return; 2031 } 2032 } 2033 2034 static void usb_mtp_realize(USBDevice *dev, Error **errp) 2035 { 2036 MTPState *s = USB_MTP(dev); 2037 2038 usb_desc_create_serial(dev); 2039 usb_desc_init(dev); 2040 QTAILQ_INIT(&s->objects); 2041 if (s->desc == NULL) { 2042 if (s->root == NULL) { 2043 error_setg(errp, "usb-mtp: rootdir property must be configured"); 2044 return; 2045 } 2046 s->desc = strrchr(s->root, '/'); 2047 if (s->desc && s->desc[0]) { 2048 s->desc = g_strdup(s->desc + 1); 2049 } else { 2050 s->desc = g_strdup("none"); 2051 } 2052 } 2053 /* Mark store as RW */ 2054 if (!s->readonly) { 2055 s->flags |= (1 << MTP_FLAG_WRITABLE); 2056 } 2057 2058 } 2059 2060 static const VMStateDescription vmstate_usb_mtp = { 2061 .name = "usb-mtp", 2062 .unmigratable = 1, 2063 .version_id = 1, 2064 .minimum_version_id = 1, 2065 .fields = (VMStateField[]) { 2066 VMSTATE_USB_DEVICE(dev, MTPState), 2067 VMSTATE_END_OF_LIST() 2068 } 2069 }; 2070 2071 static Property mtp_properties[] = { 2072 DEFINE_PROP_STRING("rootdir", MTPState, root), 2073 DEFINE_PROP_STRING("desc", MTPState, desc), 2074 DEFINE_PROP_BOOL("readonly", MTPState, readonly, true), 2075 DEFINE_PROP_END_OF_LIST(), 2076 }; 2077 2078 static void usb_mtp_class_initfn(ObjectClass *klass, void *data) 2079 { 2080 DeviceClass *dc = DEVICE_CLASS(klass); 2081 USBDeviceClass *uc = USB_DEVICE_CLASS(klass); 2082 2083 uc->realize = usb_mtp_realize; 2084 uc->product_desc = "QEMU USB MTP"; 2085 uc->usb_desc = &desc; 2086 uc->cancel_packet = usb_mtp_cancel_packet; 2087 uc->handle_attach = usb_desc_attach; 2088 uc->handle_reset = usb_mtp_handle_reset; 2089 uc->handle_control = usb_mtp_handle_control; 2090 uc->handle_data = usb_mtp_handle_data; 2091 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 2092 dc->desc = "USB Media Transfer Protocol device"; 2093 dc->fw_name = "mtp"; 2094 dc->vmsd = &vmstate_usb_mtp; 2095 dc->props = mtp_properties; 2096 } 2097 2098 static TypeInfo mtp_info = { 2099 .name = TYPE_USB_MTP, 2100 .parent = TYPE_USB_DEVICE, 2101 .instance_size = sizeof(MTPState), 2102 .class_init = usb_mtp_class_initfn, 2103 }; 2104 2105 static void usb_mtp_register_types(void) 2106 { 2107 type_register_static(&mtp_info); 2108 } 2109 2110 type_init(usb_mtp_register_types) 2111