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(events, 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; 656 657 if (o->have_children) { 658 return; 659 } 660 o->have_children = true; 661 662 dir = opendir(o->path); 663 if (!dir) { 664 return; 665 } 666 #ifdef CONFIG_INOTIFY1 667 int watchfd = usb_mtp_add_watch(s->inotifyfd, o->path); 668 if (watchfd == -1) { 669 fprintf(stderr, "usb-mtp: failed to add watch for %s\n", o->path); 670 } else { 671 trace_usb_mtp_inotify_event(s->dev.addr, o->path, 672 0, "Watch Added"); 673 o->watchfd = watchfd; 674 } 675 #endif 676 while ((entry = readdir(dir)) != NULL) { 677 usb_mtp_add_child(s, o, entry->d_name); 678 } 679 closedir(dir); 680 } 681 682 /* ----------------------------------------------------------------------- */ 683 684 static MTPData *usb_mtp_data_alloc(MTPControl *c) 685 { 686 MTPData *data = g_new0(MTPData, 1); 687 688 data->code = c->code; 689 data->trans = c->trans; 690 data->fd = -1; 691 data->first = true; 692 return data; 693 } 694 695 static void usb_mtp_data_free(MTPData *data) 696 { 697 if (data == NULL) { 698 return; 699 } 700 if (data->fd != -1) { 701 close(data->fd); 702 } 703 g_free(data->data); 704 g_free(data); 705 } 706 707 static void usb_mtp_realloc(MTPData *data, uint32_t bytes) 708 { 709 if (data->length + bytes <= data->alloc) { 710 return; 711 } 712 data->alloc = (data->length + bytes + 0xff) & ~0xff; 713 data->data = g_realloc(data->data, data->alloc); 714 } 715 716 static void usb_mtp_add_u8(MTPData *data, uint8_t val) 717 { 718 usb_mtp_realloc(data, 1); 719 data->data[data->length++] = val; 720 } 721 722 static void usb_mtp_add_u16(MTPData *data, uint16_t val) 723 { 724 usb_mtp_realloc(data, 2); 725 data->data[data->length++] = (val >> 0) & 0xff; 726 data->data[data->length++] = (val >> 8) & 0xff; 727 } 728 729 static void usb_mtp_add_u32(MTPData *data, uint32_t val) 730 { 731 usb_mtp_realloc(data, 4); 732 data->data[data->length++] = (val >> 0) & 0xff; 733 data->data[data->length++] = (val >> 8) & 0xff; 734 data->data[data->length++] = (val >> 16) & 0xff; 735 data->data[data->length++] = (val >> 24) & 0xff; 736 } 737 738 static void usb_mtp_add_u64(MTPData *data, uint64_t val) 739 { 740 usb_mtp_realloc(data, 8); 741 data->data[data->length++] = (val >> 0) & 0xff; 742 data->data[data->length++] = (val >> 8) & 0xff; 743 data->data[data->length++] = (val >> 16) & 0xff; 744 data->data[data->length++] = (val >> 24) & 0xff; 745 data->data[data->length++] = (val >> 32) & 0xff; 746 data->data[data->length++] = (val >> 40) & 0xff; 747 data->data[data->length++] = (val >> 48) & 0xff; 748 data->data[data->length++] = (val >> 56) & 0xff; 749 } 750 751 static void usb_mtp_add_u16_array(MTPData *data, uint32_t len, 752 const uint16_t *vals) 753 { 754 int i; 755 756 usb_mtp_add_u32(data, len); 757 for (i = 0; i < len; i++) { 758 usb_mtp_add_u16(data, vals[i]); 759 } 760 } 761 762 static void usb_mtp_add_u32_array(MTPData *data, uint32_t len, 763 const uint32_t *vals) 764 { 765 int i; 766 767 usb_mtp_add_u32(data, len); 768 for (i = 0; i < len; i++) { 769 usb_mtp_add_u32(data, vals[i]); 770 } 771 } 772 773 static void usb_mtp_add_wstr(MTPData *data, const wchar_t *str) 774 { 775 uint32_t len = wcslen(str); 776 int i; 777 778 if (len > 0) { 779 len++; /* include terminating L'\0' */ 780 } 781 782 usb_mtp_add_u8(data, len); 783 for (i = 0; i < len; i++) { 784 usb_mtp_add_u16(data, str[i]); 785 } 786 } 787 788 static void usb_mtp_add_str(MTPData *data, const char *str) 789 { 790 uint32_t len = strlen(str)+1; 791 wchar_t *wstr = g_new(wchar_t, len); 792 size_t ret; 793 794 ret = mbstowcs(wstr, str, len); 795 if (ret == -1) { 796 usb_mtp_add_wstr(data, L"Oops"); 797 } else { 798 usb_mtp_add_wstr(data, wstr); 799 } 800 801 g_free(wstr); 802 } 803 804 static void usb_mtp_add_time(MTPData *data, time_t time) 805 { 806 char buf[16]; 807 struct tm tm; 808 809 gmtime_r(&time, &tm); 810 strftime(buf, sizeof(buf), "%Y%m%dT%H%M%S", &tm); 811 usb_mtp_add_str(data, buf); 812 } 813 814 /* ----------------------------------------------------------------------- */ 815 816 static void usb_mtp_queue_result(MTPState *s, uint16_t code, uint32_t trans, 817 int argc, uint32_t arg0, uint32_t arg1, 818 uint32_t arg2) 819 { 820 MTPControl *c = g_new0(MTPControl, 1); 821 822 c->code = code; 823 c->trans = trans; 824 c->argc = argc; 825 if (argc > 0) { 826 c->argv[0] = arg0; 827 } 828 if (argc > 1) { 829 c->argv[1] = arg1; 830 } 831 if (argc > 2) { 832 c->argv[2] = arg2; 833 } 834 835 assert(s->result == NULL); 836 s->result = c; 837 } 838 839 /* ----------------------------------------------------------------------- */ 840 841 static MTPData *usb_mtp_get_device_info(MTPState *s, MTPControl *c) 842 { 843 static const uint16_t ops[] = { 844 CMD_GET_DEVICE_INFO, 845 CMD_OPEN_SESSION, 846 CMD_CLOSE_SESSION, 847 CMD_GET_STORAGE_IDS, 848 CMD_GET_STORAGE_INFO, 849 CMD_GET_NUM_OBJECTS, 850 CMD_GET_OBJECT_HANDLES, 851 CMD_GET_OBJECT_INFO, 852 CMD_DELETE_OBJECT, 853 CMD_SEND_OBJECT_INFO, 854 CMD_SEND_OBJECT, 855 CMD_GET_OBJECT, 856 CMD_GET_PARTIAL_OBJECT, 857 CMD_GET_OBJECT_PROPS_SUPPORTED, 858 CMD_GET_OBJECT_PROP_DESC, 859 CMD_GET_OBJECT_PROP_VALUE, 860 }; 861 static const uint16_t fmt[] = { 862 FMT_UNDEFINED_OBJECT, 863 FMT_ASSOCIATION, 864 }; 865 MTPData *d = usb_mtp_data_alloc(c); 866 867 trace_usb_mtp_op_get_device_info(s->dev.addr); 868 869 usb_mtp_add_u16(d, 100); 870 usb_mtp_add_u32(d, 0x00000006); 871 usb_mtp_add_u16(d, 0x0064); 872 usb_mtp_add_wstr(d, L""); 873 usb_mtp_add_u16(d, 0x0000); 874 875 usb_mtp_add_u16_array(d, ARRAY_SIZE(ops), ops); 876 usb_mtp_add_u16_array(d, 0, NULL); 877 usb_mtp_add_u16_array(d, 0, NULL); 878 usb_mtp_add_u16_array(d, 0, NULL); 879 usb_mtp_add_u16_array(d, ARRAY_SIZE(fmt), fmt); 880 881 usb_mtp_add_wstr(d, L"" MTP_MANUFACTURER); 882 usb_mtp_add_wstr(d, L"" MTP_PRODUCT); 883 usb_mtp_add_wstr(d, L"0.1"); 884 usb_mtp_add_wstr(d, L"0123456789abcdef0123456789abcdef"); 885 886 return d; 887 } 888 889 static MTPData *usb_mtp_get_storage_ids(MTPState *s, MTPControl *c) 890 { 891 static const uint32_t ids[] = { 892 QEMU_STORAGE_ID, 893 }; 894 MTPData *d = usb_mtp_data_alloc(c); 895 896 trace_usb_mtp_op_get_storage_ids(s->dev.addr); 897 898 usb_mtp_add_u32_array(d, ARRAY_SIZE(ids), ids); 899 900 return d; 901 } 902 903 static MTPData *usb_mtp_get_storage_info(MTPState *s, MTPControl *c) 904 { 905 MTPData *d = usb_mtp_data_alloc(c); 906 struct statvfs buf; 907 int rc; 908 909 trace_usb_mtp_op_get_storage_info(s->dev.addr); 910 911 if (FLAG_SET(s, MTP_FLAG_WRITABLE)) { 912 usb_mtp_add_u16(d, 0x0003); 913 usb_mtp_add_u16(d, 0x0002); 914 usb_mtp_add_u16(d, 0x0000); 915 } else { 916 usb_mtp_add_u16(d, 0x0001); 917 usb_mtp_add_u16(d, 0x0002); 918 usb_mtp_add_u16(d, 0x0001); 919 } 920 921 rc = statvfs(s->root, &buf); 922 if (rc == 0) { 923 usb_mtp_add_u64(d, (uint64_t)buf.f_frsize * buf.f_blocks); 924 usb_mtp_add_u64(d, (uint64_t)buf.f_bavail * buf.f_blocks); 925 usb_mtp_add_u32(d, buf.f_ffree); 926 } else { 927 usb_mtp_add_u64(d, 0xffffffff); 928 usb_mtp_add_u64(d, 0xffffffff); 929 usb_mtp_add_u32(d, 0xffffffff); 930 } 931 932 usb_mtp_add_str(d, s->desc); 933 usb_mtp_add_wstr(d, L"123456789abcdef"); 934 return d; 935 } 936 937 static MTPData *usb_mtp_get_object_handles(MTPState *s, MTPControl *c, 938 MTPObject *o) 939 { 940 MTPData *d = usb_mtp_data_alloc(c); 941 uint32_t i = 0, handles[o->nchildren]; 942 MTPObject *iter; 943 944 trace_usb_mtp_op_get_object_handles(s->dev.addr, o->handle, o->path); 945 946 QLIST_FOREACH(iter, &o->children, list) { 947 handles[i++] = iter->handle; 948 } 949 assert(i == o->nchildren); 950 usb_mtp_add_u32_array(d, o->nchildren, handles); 951 952 return d; 953 } 954 955 static MTPData *usb_mtp_get_object_info(MTPState *s, MTPControl *c, 956 MTPObject *o) 957 { 958 MTPData *d = usb_mtp_data_alloc(c); 959 960 trace_usb_mtp_op_get_object_info(s->dev.addr, o->handle, o->path); 961 962 usb_mtp_add_u32(d, QEMU_STORAGE_ID); 963 usb_mtp_add_u16(d, o->format); 964 usb_mtp_add_u16(d, 0); 965 966 if (o->stat.st_size > 0xFFFFFFFF) { 967 usb_mtp_add_u32(d, 0xFFFFFFFF); 968 } else { 969 usb_mtp_add_u32(d, o->stat.st_size); 970 } 971 972 usb_mtp_add_u16(d, 0); 973 usb_mtp_add_u32(d, 0); 974 usb_mtp_add_u32(d, 0); 975 usb_mtp_add_u32(d, 0); 976 usb_mtp_add_u32(d, 0); 977 usb_mtp_add_u32(d, 0); 978 usb_mtp_add_u32(d, 0); 979 980 if (o->parent) { 981 usb_mtp_add_u32(d, o->parent->handle); 982 } else { 983 usb_mtp_add_u32(d, 0); 984 } 985 if (o->format == FMT_ASSOCIATION) { 986 usb_mtp_add_u16(d, 0x0001); 987 usb_mtp_add_u32(d, 0x00000001); 988 usb_mtp_add_u32(d, 0); 989 } else { 990 usb_mtp_add_u16(d, 0); 991 usb_mtp_add_u32(d, 0); 992 usb_mtp_add_u32(d, 0); 993 } 994 995 usb_mtp_add_str(d, o->name); 996 usb_mtp_add_time(d, o->stat.st_ctime); 997 usb_mtp_add_time(d, o->stat.st_mtime); 998 usb_mtp_add_wstr(d, L""); 999 1000 return d; 1001 } 1002 1003 static MTPData *usb_mtp_get_object(MTPState *s, MTPControl *c, 1004 MTPObject *o) 1005 { 1006 MTPData *d = usb_mtp_data_alloc(c); 1007 1008 trace_usb_mtp_op_get_object(s->dev.addr, o->handle, o->path); 1009 1010 d->fd = open(o->path, O_RDONLY); 1011 if (d->fd == -1) { 1012 usb_mtp_data_free(d); 1013 return NULL; 1014 } 1015 d->length = o->stat.st_size; 1016 d->alloc = 512; 1017 d->data = g_malloc(d->alloc); 1018 return d; 1019 } 1020 1021 static MTPData *usb_mtp_get_partial_object(MTPState *s, MTPControl *c, 1022 MTPObject *o) 1023 { 1024 MTPData *d; 1025 off_t offset; 1026 1027 if (c->argc <= 2) { 1028 return NULL; 1029 } 1030 trace_usb_mtp_op_get_partial_object(s->dev.addr, o->handle, o->path, 1031 c->argv[1], c->argv[2]); 1032 1033 d = usb_mtp_data_alloc(c); 1034 d->fd = open(o->path, O_RDONLY); 1035 if (d->fd == -1) { 1036 usb_mtp_data_free(d); 1037 return NULL; 1038 } 1039 1040 offset = c->argv[1]; 1041 if (offset > o->stat.st_size) { 1042 offset = o->stat.st_size; 1043 } 1044 if (lseek(d->fd, offset, SEEK_SET) < 0) { 1045 usb_mtp_data_free(d); 1046 return NULL; 1047 } 1048 1049 d->length = c->argv[2]; 1050 if (d->length > o->stat.st_size - offset) { 1051 d->length = o->stat.st_size - offset; 1052 } 1053 1054 return d; 1055 } 1056 1057 static MTPData *usb_mtp_get_object_props_supported(MTPState *s, MTPControl *c) 1058 { 1059 static const uint16_t props[] = { 1060 PROP_STORAGE_ID, 1061 PROP_OBJECT_FORMAT, 1062 PROP_OBJECT_COMPRESSED_SIZE, 1063 PROP_PARENT_OBJECT, 1064 PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER, 1065 PROP_NAME, 1066 }; 1067 MTPData *d = usb_mtp_data_alloc(c); 1068 usb_mtp_add_u16_array(d, ARRAY_SIZE(props), props); 1069 1070 return d; 1071 } 1072 1073 static MTPData *usb_mtp_get_object_prop_desc(MTPState *s, MTPControl *c) 1074 { 1075 MTPData *d = usb_mtp_data_alloc(c); 1076 switch (c->argv[0]) { 1077 case PROP_STORAGE_ID: 1078 usb_mtp_add_u16(d, PROP_STORAGE_ID); 1079 usb_mtp_add_u16(d, DATA_TYPE_UINT32); 1080 usb_mtp_add_u8(d, 0x00); 1081 usb_mtp_add_u32(d, 0x00000000); 1082 usb_mtp_add_u32(d, 0x00000000); 1083 usb_mtp_add_u8(d, 0x00); 1084 break; 1085 case PROP_OBJECT_FORMAT: 1086 usb_mtp_add_u16(d, PROP_OBJECT_FORMAT); 1087 usb_mtp_add_u16(d, DATA_TYPE_UINT16); 1088 usb_mtp_add_u8(d, 0x00); 1089 usb_mtp_add_u16(d, 0x0000); 1090 usb_mtp_add_u32(d, 0x00000000); 1091 usb_mtp_add_u8(d, 0x00); 1092 break; 1093 case PROP_OBJECT_COMPRESSED_SIZE: 1094 usb_mtp_add_u16(d, PROP_OBJECT_COMPRESSED_SIZE); 1095 usb_mtp_add_u16(d, DATA_TYPE_UINT64); 1096 usb_mtp_add_u8(d, 0x00); 1097 usb_mtp_add_u64(d, 0x0000000000000000); 1098 usb_mtp_add_u32(d, 0x00000000); 1099 usb_mtp_add_u8(d, 0x00); 1100 break; 1101 case PROP_PARENT_OBJECT: 1102 usb_mtp_add_u16(d, PROP_PARENT_OBJECT); 1103 usb_mtp_add_u16(d, DATA_TYPE_UINT32); 1104 usb_mtp_add_u8(d, 0x00); 1105 usb_mtp_add_u32(d, 0x00000000); 1106 usb_mtp_add_u32(d, 0x00000000); 1107 usb_mtp_add_u8(d, 0x00); 1108 break; 1109 case PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER: 1110 usb_mtp_add_u16(d, PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER); 1111 usb_mtp_add_u16(d, DATA_TYPE_UINT128); 1112 usb_mtp_add_u8(d, 0x00); 1113 usb_mtp_add_u64(d, 0x0000000000000000); 1114 usb_mtp_add_u64(d, 0x0000000000000000); 1115 usb_mtp_add_u32(d, 0x00000000); 1116 usb_mtp_add_u8(d, 0x00); 1117 break; 1118 case PROP_NAME: 1119 usb_mtp_add_u16(d, PROP_NAME); 1120 usb_mtp_add_u16(d, DATA_TYPE_STRING); 1121 usb_mtp_add_u8(d, 0x00); 1122 usb_mtp_add_u8(d, 0x00); 1123 usb_mtp_add_u32(d, 0x00000000); 1124 usb_mtp_add_u8(d, 0x00); 1125 break; 1126 default: 1127 usb_mtp_data_free(d); 1128 return NULL; 1129 } 1130 1131 return d; 1132 } 1133 1134 static MTPData *usb_mtp_get_object_prop_value(MTPState *s, MTPControl *c, 1135 MTPObject *o) 1136 { 1137 MTPData *d = usb_mtp_data_alloc(c); 1138 switch (c->argv[1]) { 1139 case PROP_STORAGE_ID: 1140 usb_mtp_add_u32(d, QEMU_STORAGE_ID); 1141 break; 1142 case PROP_OBJECT_FORMAT: 1143 usb_mtp_add_u16(d, o->format); 1144 break; 1145 case PROP_OBJECT_COMPRESSED_SIZE: 1146 usb_mtp_add_u64(d, o->stat.st_size); 1147 break; 1148 case PROP_PARENT_OBJECT: 1149 if (o->parent == NULL) { 1150 usb_mtp_add_u32(d, 0x00000000); 1151 } else { 1152 usb_mtp_add_u32(d, o->parent->handle); 1153 } 1154 break; 1155 case PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER: 1156 /* Should be persistent between sessions, 1157 * but using our objedt ID is "good enough" 1158 * for now */ 1159 usb_mtp_add_u64(d, 0x0000000000000000); 1160 usb_mtp_add_u64(d, o->handle); 1161 break; 1162 case PROP_NAME: 1163 usb_mtp_add_str(d, o->name); 1164 break; 1165 default: 1166 usb_mtp_data_free(d); 1167 return NULL; 1168 } 1169 1170 return d; 1171 } 1172 1173 /* Return correct return code for a delete event */ 1174 enum { 1175 ALL_DELETE, 1176 PARTIAL_DELETE, 1177 READ_ONLY, 1178 }; 1179 1180 /* Assumes that children, if any, have been already freed */ 1181 static void usb_mtp_object_free_one(MTPState *s, MTPObject *o) 1182 { 1183 #ifndef CONFIG_INOTIFY1 1184 assert(o->nchildren == 0); 1185 QTAILQ_REMOVE(&s->objects, o, next); 1186 g_free(o->name); 1187 g_free(o->path); 1188 g_free(o); 1189 #endif 1190 } 1191 1192 static int usb_mtp_deletefn(MTPState *s, MTPObject *o, uint32_t trans) 1193 { 1194 MTPObject *iter, *iter2; 1195 bool partial_delete = false; 1196 bool success = false; 1197 1198 /* 1199 * TODO: Add support for Protection Status 1200 */ 1201 1202 QLIST_FOREACH(iter, &o->children, list) { 1203 if (iter->format == FMT_ASSOCIATION) { 1204 QLIST_FOREACH(iter2, &iter->children, list) { 1205 usb_mtp_deletefn(s, iter2, trans); 1206 } 1207 } 1208 } 1209 1210 if (o->format == FMT_UNDEFINED_OBJECT) { 1211 if (remove(o->path)) { 1212 partial_delete = true; 1213 } else { 1214 usb_mtp_object_free_one(s, o); 1215 success = true; 1216 } 1217 } 1218 1219 if (o->format == FMT_ASSOCIATION) { 1220 if (rmdir(o->path)) { 1221 partial_delete = true; 1222 } else { 1223 usb_mtp_object_free_one(s, o); 1224 success = true; 1225 } 1226 } 1227 1228 if (success && partial_delete) { 1229 return PARTIAL_DELETE; 1230 } 1231 if (!success && partial_delete) { 1232 return READ_ONLY; 1233 } 1234 return ALL_DELETE; 1235 } 1236 1237 static void usb_mtp_object_delete(MTPState *s, uint32_t handle, 1238 uint32_t format_code, uint32_t trans) 1239 { 1240 MTPObject *o; 1241 int ret; 1242 1243 /* Return error if store is read-only */ 1244 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) { 1245 usb_mtp_queue_result(s, RES_STORE_READ_ONLY, 1246 trans, 0, 0, 0, 0); 1247 return; 1248 } 1249 1250 if (format_code != 0) { 1251 usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED, 1252 trans, 0, 0, 0, 0); 1253 return; 1254 } 1255 1256 if (handle == 0xFFFFFFF) { 1257 o = QTAILQ_FIRST(&s->objects); 1258 } else { 1259 o = usb_mtp_object_lookup(s, handle); 1260 } 1261 if (o == NULL) { 1262 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1263 trans, 0, 0, 0, 0); 1264 return; 1265 } 1266 1267 ret = usb_mtp_deletefn(s, o, trans); 1268 if (ret == PARTIAL_DELETE) { 1269 usb_mtp_queue_result(s, RES_PARTIAL_DELETE, 1270 trans, 0, 0, 0, 0); 1271 return; 1272 } else if (ret == READ_ONLY) { 1273 usb_mtp_queue_result(s, RES_STORE_READ_ONLY, trans, 1274 0, 0, 0, 0); 1275 return; 1276 } else { 1277 usb_mtp_queue_result(s, RES_OK, trans, 1278 0, 0, 0, 0); 1279 return; 1280 } 1281 } 1282 1283 static void usb_mtp_command(MTPState *s, MTPControl *c) 1284 { 1285 MTPData *data_in = NULL; 1286 MTPObject *o = NULL; 1287 uint32_t nres = 0, res0 = 0; 1288 1289 /* sanity checks */ 1290 if (c->code >= CMD_CLOSE_SESSION && s->session == 0) { 1291 usb_mtp_queue_result(s, RES_SESSION_NOT_OPEN, 1292 c->trans, 0, 0, 0, 0); 1293 return; 1294 } 1295 1296 /* process commands */ 1297 switch (c->code) { 1298 case CMD_GET_DEVICE_INFO: 1299 data_in = usb_mtp_get_device_info(s, c); 1300 break; 1301 case CMD_OPEN_SESSION: 1302 if (s->session) { 1303 usb_mtp_queue_result(s, RES_SESSION_ALREADY_OPEN, 1304 c->trans, 1, s->session, 0, 0); 1305 return; 1306 } 1307 if (c->argv[0] == 0) { 1308 usb_mtp_queue_result(s, RES_INVALID_PARAMETER, 1309 c->trans, 0, 0, 0, 0); 1310 return; 1311 } 1312 trace_usb_mtp_op_open_session(s->dev.addr); 1313 s->session = c->argv[0]; 1314 usb_mtp_object_alloc(s, s->next_handle++, NULL, s->root); 1315 #ifdef CONFIG_INOTIFY1 1316 if (usb_mtp_inotify_init(s)) { 1317 fprintf(stderr, "usb-mtp: file monitoring init failed\n"); 1318 } 1319 #endif 1320 break; 1321 case CMD_CLOSE_SESSION: 1322 trace_usb_mtp_op_close_session(s->dev.addr); 1323 s->session = 0; 1324 s->next_handle = 0; 1325 #ifdef CONFIG_INOTIFY1 1326 usb_mtp_inotify_cleanup(s); 1327 #endif 1328 usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects)); 1329 assert(QTAILQ_EMPTY(&s->objects)); 1330 break; 1331 case CMD_GET_STORAGE_IDS: 1332 data_in = usb_mtp_get_storage_ids(s, c); 1333 break; 1334 case CMD_GET_STORAGE_INFO: 1335 if (c->argv[0] != QEMU_STORAGE_ID && 1336 c->argv[0] != 0xffffffff) { 1337 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID, 1338 c->trans, 0, 0, 0, 0); 1339 return; 1340 } 1341 data_in = usb_mtp_get_storage_info(s, c); 1342 break; 1343 case CMD_GET_NUM_OBJECTS: 1344 case CMD_GET_OBJECT_HANDLES: 1345 if (c->argv[0] != QEMU_STORAGE_ID && 1346 c->argv[0] != 0xffffffff) { 1347 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID, 1348 c->trans, 0, 0, 0, 0); 1349 return; 1350 } 1351 if (c->argv[1] != 0x00000000) { 1352 usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED, 1353 c->trans, 0, 0, 0, 0); 1354 return; 1355 } 1356 if (c->argv[2] == 0x00000000 || 1357 c->argv[2] == 0xffffffff) { 1358 o = QTAILQ_FIRST(&s->objects); 1359 } else { 1360 o = usb_mtp_object_lookup(s, c->argv[2]); 1361 } 1362 if (o == NULL) { 1363 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1364 c->trans, 0, 0, 0, 0); 1365 return; 1366 } 1367 if (o->format != FMT_ASSOCIATION) { 1368 usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT, 1369 c->trans, 0, 0, 0, 0); 1370 return; 1371 } 1372 usb_mtp_object_readdir(s, o); 1373 if (c->code == CMD_GET_NUM_OBJECTS) { 1374 trace_usb_mtp_op_get_num_objects(s->dev.addr, o->handle, o->path); 1375 nres = 1; 1376 res0 = o->nchildren; 1377 } else { 1378 data_in = usb_mtp_get_object_handles(s, c, o); 1379 } 1380 break; 1381 case CMD_GET_OBJECT_INFO: 1382 o = usb_mtp_object_lookup(s, c->argv[0]); 1383 if (o == NULL) { 1384 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1385 c->trans, 0, 0, 0, 0); 1386 return; 1387 } 1388 data_in = usb_mtp_get_object_info(s, c, o); 1389 break; 1390 case CMD_GET_OBJECT: 1391 o = usb_mtp_object_lookup(s, c->argv[0]); 1392 if (o == NULL) { 1393 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1394 c->trans, 0, 0, 0, 0); 1395 return; 1396 } 1397 if (o->format == FMT_ASSOCIATION) { 1398 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1399 c->trans, 0, 0, 0, 0); 1400 return; 1401 } 1402 data_in = usb_mtp_get_object(s, c, o); 1403 if (data_in == NULL) { 1404 usb_mtp_queue_result(s, RES_GENERAL_ERROR, 1405 c->trans, 0, 0, 0, 0); 1406 return; 1407 } 1408 break; 1409 case CMD_DELETE_OBJECT: 1410 usb_mtp_object_delete(s, c->argv[0], c->argv[1], c->trans); 1411 return; 1412 case CMD_GET_PARTIAL_OBJECT: 1413 o = usb_mtp_object_lookup(s, c->argv[0]); 1414 if (o == NULL) { 1415 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1416 c->trans, 0, 0, 0, 0); 1417 return; 1418 } 1419 if (o->format == FMT_ASSOCIATION) { 1420 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1421 c->trans, 0, 0, 0, 0); 1422 return; 1423 } 1424 data_in = usb_mtp_get_partial_object(s, c, o); 1425 if (data_in == NULL) { 1426 usb_mtp_queue_result(s, RES_GENERAL_ERROR, 1427 c->trans, 0, 0, 0, 0); 1428 return; 1429 } 1430 nres = 1; 1431 res0 = data_in->length; 1432 break; 1433 case CMD_SEND_OBJECT_INFO: 1434 /* Return error if store is read-only */ 1435 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) { 1436 usb_mtp_queue_result(s, RES_STORE_READ_ONLY, 1437 c->trans, 0, 0, 0, 0); 1438 } else if (c->argv[0] && (c->argv[0] != QEMU_STORAGE_ID)) { 1439 /* First parameter points to storage id or is 0 */ 1440 usb_mtp_queue_result(s, RES_STORE_NOT_AVAILABLE, c->trans, 1441 0, 0, 0, 0); 1442 } else if (c->argv[1] && !c->argv[0]) { 1443 /* If second parameter is specified, first must also be specified */ 1444 usb_mtp_queue_result(s, RES_DESTINATION_UNSUPPORTED, c->trans, 1445 0, 0, 0, 0); 1446 } else { 1447 uint32_t handle = c->argv[1]; 1448 if (handle == 0xFFFFFFFF || handle == 0) { 1449 /* root object */ 1450 o = QTAILQ_FIRST(&s->objects); 1451 } else { 1452 o = usb_mtp_object_lookup(s, handle); 1453 } 1454 if (o == NULL) { 1455 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, c->trans, 1456 0, 0, 0, 0); 1457 } else if (o->format != FMT_ASSOCIATION) { 1458 usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT, c->trans, 1459 0, 0, 0, 0); 1460 } 1461 } 1462 if (o) { 1463 s->dataset.parent_handle = o->handle; 1464 } 1465 s->data_out = usb_mtp_data_alloc(c); 1466 return; 1467 case CMD_SEND_OBJECT: 1468 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) { 1469 usb_mtp_queue_result(s, RES_STORE_READ_ONLY, 1470 c->trans, 0, 0, 0, 0); 1471 return; 1472 } 1473 if (!s->write_pending) { 1474 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, 1475 c->trans, 0, 0, 0, 0); 1476 return; 1477 } 1478 s->data_out = usb_mtp_data_alloc(c); 1479 return; 1480 case CMD_GET_OBJECT_PROPS_SUPPORTED: 1481 if (c->argv[0] != FMT_UNDEFINED_OBJECT && 1482 c->argv[0] != FMT_ASSOCIATION) { 1483 usb_mtp_queue_result(s, RES_INVALID_OBJECT_FORMAT_CODE, 1484 c->trans, 0, 0, 0, 0); 1485 return; 1486 } 1487 data_in = usb_mtp_get_object_props_supported(s, c); 1488 break; 1489 case CMD_GET_OBJECT_PROP_DESC: 1490 if (c->argv[1] != FMT_UNDEFINED_OBJECT && 1491 c->argv[1] != FMT_ASSOCIATION) { 1492 usb_mtp_queue_result(s, RES_INVALID_OBJECT_FORMAT_CODE, 1493 c->trans, 0, 0, 0, 0); 1494 return; 1495 } 1496 data_in = usb_mtp_get_object_prop_desc(s, c); 1497 if (data_in == NULL) { 1498 usb_mtp_queue_result(s, RES_INVALID_OBJECT_PROP_CODE, 1499 c->trans, 0, 0, 0, 0); 1500 return; 1501 } 1502 break; 1503 case CMD_GET_OBJECT_PROP_VALUE: 1504 o = usb_mtp_object_lookup(s, c->argv[0]); 1505 if (o == NULL) { 1506 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1507 c->trans, 0, 0, 0, 0); 1508 return; 1509 } 1510 data_in = usb_mtp_get_object_prop_value(s, c, o); 1511 if (data_in == NULL) { 1512 usb_mtp_queue_result(s, RES_INVALID_OBJECT_PROP_CODE, 1513 c->trans, 0, 0, 0, 0); 1514 return; 1515 } 1516 break; 1517 default: 1518 trace_usb_mtp_op_unknown(s->dev.addr, c->code); 1519 usb_mtp_queue_result(s, RES_OPERATION_NOT_SUPPORTED, 1520 c->trans, 0, 0, 0, 0); 1521 return; 1522 } 1523 1524 /* return results on success */ 1525 if (data_in) { 1526 assert(s->data_in == NULL); 1527 s->data_in = data_in; 1528 } 1529 usb_mtp_queue_result(s, RES_OK, c->trans, nres, res0, 0, 0); 1530 } 1531 1532 /* ----------------------------------------------------------------------- */ 1533 1534 static void usb_mtp_handle_reset(USBDevice *dev) 1535 { 1536 MTPState *s = USB_MTP(dev); 1537 1538 trace_usb_mtp_reset(s->dev.addr); 1539 1540 #ifdef CONFIG_INOTIFY1 1541 usb_mtp_inotify_cleanup(s); 1542 #endif 1543 usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects)); 1544 s->session = 0; 1545 usb_mtp_data_free(s->data_in); 1546 s->data_in = NULL; 1547 usb_mtp_data_free(s->data_out); 1548 s->data_out = NULL; 1549 g_free(s->result); 1550 s->result = NULL; 1551 } 1552 1553 static void usb_mtp_handle_control(USBDevice *dev, USBPacket *p, 1554 int request, int value, int index, 1555 int length, uint8_t *data) 1556 { 1557 int ret; 1558 MTPState *s = USB_MTP(dev); 1559 uint16_t *event = (uint16_t *)data; 1560 1561 switch (request) { 1562 case ClassInterfaceOutRequest | 0x64: 1563 if (*event == EVT_CANCEL_TRANSACTION) { 1564 g_free(s->result); 1565 s->result = NULL; 1566 usb_mtp_data_free(s->data_in); 1567 s->data_in = NULL; 1568 if (s->write_pending) { 1569 g_free(s->dataset.filename); 1570 s->write_pending = false; 1571 } 1572 usb_mtp_data_free(s->data_out); 1573 s->data_out = NULL; 1574 } else { 1575 p->status = USB_RET_STALL; 1576 } 1577 break; 1578 default: 1579 ret = usb_desc_handle_control(dev, p, request, 1580 value, index, length, data); 1581 if (ret >= 0) { 1582 return; 1583 } 1584 } 1585 1586 trace_usb_mtp_stall(dev->addr, "unknown control request"); 1587 } 1588 1589 static void usb_mtp_cancel_packet(USBDevice *dev, USBPacket *p) 1590 { 1591 /* we don't use async packets, so this should never be called */ 1592 fprintf(stderr, "%s\n", __func__); 1593 } 1594 1595 static void utf16_to_str(uint8_t len, uint16_t *arr, char *name) 1596 { 1597 int count; 1598 wchar_t *wstr = g_new0(wchar_t, len); 1599 1600 for (count = 0; count < len; count++) { 1601 wstr[count] = (wchar_t)arr[count]; 1602 } 1603 1604 wcstombs(name, wstr, len); 1605 g_free(wstr); 1606 } 1607 1608 /* Wrapper around write, returns 0 on failure */ 1609 static uint64_t write_retry(int fd, void *buf, uint64_t size) 1610 { 1611 uint64_t bytes_left = size, ret; 1612 1613 while (bytes_left > 0) { 1614 ret = write(fd, buf, bytes_left); 1615 if ((ret == -1) && (errno != EINTR || errno != EAGAIN || 1616 errno != EWOULDBLOCK)) { 1617 break; 1618 } 1619 bytes_left -= ret; 1620 buf += ret; 1621 } 1622 1623 return size - bytes_left; 1624 } 1625 1626 static void usb_mtp_write_data(MTPState *s) 1627 { 1628 MTPData *d = s->data_out; 1629 MTPObject *parent = 1630 usb_mtp_object_lookup(s, s->dataset.parent_handle); 1631 char *path = NULL; 1632 uint64_t rc; 1633 mode_t mask = 0644; 1634 1635 assert(d != NULL); 1636 1637 if (parent == NULL || !s->write_pending) { 1638 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, d->trans, 1639 0, 0, 0, 0); 1640 return; 1641 } 1642 1643 if (s->dataset.filename) { 1644 path = g_strdup_printf("%s/%s", parent->path, s->dataset.filename); 1645 if (s->dataset.format == FMT_ASSOCIATION) { 1646 d->fd = mkdir(path, mask); 1647 goto free; 1648 } 1649 if ((s->dataset.size != 0xFFFFFFFF) && (s->dataset.size < d->length)) { 1650 usb_mtp_queue_result(s, RES_STORE_FULL, d->trans, 1651 0, 0, 0, 0); 1652 goto done; 1653 } 1654 d->fd = open(path, O_CREAT | O_WRONLY, mask); 1655 if (d->fd == -1) { 1656 usb_mtp_queue_result(s, RES_STORE_FULL, d->trans, 1657 0, 0, 0, 0); 1658 goto done; 1659 } 1660 1661 /* 1662 * Return success if initiator sent 0 sized data 1663 */ 1664 if (!s->dataset.size) { 1665 goto success; 1666 } 1667 1668 rc = write_retry(d->fd, d->data, s->dataset.size); 1669 if (!rc) { 1670 usb_mtp_queue_result(s, RES_STORE_FULL, d->trans, 1671 0, 0, 0, 0); 1672 goto done; 1673 } 1674 if (rc != s->dataset.size) { 1675 usb_mtp_queue_result(s, RES_INCOMPLETE_TRANSFER, d->trans, 1676 0, 0, 0, 0); 1677 goto done; 1678 } 1679 } 1680 1681 success: 1682 usb_mtp_queue_result(s, RES_OK, d->trans, 1683 0, 0, 0, 0); 1684 1685 done: 1686 /* 1687 * The write dataset is kept around and freed only 1688 * on success or if another write request comes in 1689 */ 1690 if (d->fd != -1) { 1691 close(d->fd); 1692 } 1693 free: 1694 g_free(s->dataset.filename); 1695 g_free(path); 1696 s->write_pending = false; 1697 } 1698 1699 static void usb_mtp_write_metadata(MTPState *s) 1700 { 1701 MTPData *d = s->data_out; 1702 ObjectInfo *dataset = (ObjectInfo *)d->data; 1703 char *filename = g_new0(char, dataset->length); 1704 MTPObject *o; 1705 MTPObject *p = usb_mtp_object_lookup(s, s->dataset.parent_handle); 1706 uint32_t next_handle = s->next_handle; 1707 1708 assert(!s->write_pending); 1709 assert(p != NULL); 1710 1711 utf16_to_str(dataset->length, dataset->filename, filename); 1712 1713 o = usb_mtp_object_lookup_name(p, filename, dataset->length); 1714 if (o != NULL) { 1715 next_handle = o->handle; 1716 } 1717 1718 s->dataset.filename = filename; 1719 s->dataset.format = dataset->format; 1720 s->dataset.size = dataset->size; 1721 s->dataset.filename = filename; 1722 s->write_pending = true; 1723 1724 if (s->dataset.format == FMT_ASSOCIATION) { 1725 usb_mtp_write_data(s); 1726 /* next_handle will be allocated to the newly created dir */ 1727 if (d->fd == -1) { 1728 usb_mtp_queue_result(s, RES_STORE_FULL, d->trans, 1729 0, 0, 0, 0); 1730 return; 1731 } 1732 d->fd = -1; 1733 } 1734 1735 usb_mtp_queue_result(s, RES_OK, d->trans, 3, QEMU_STORAGE_ID, 1736 s->dataset.parent_handle, next_handle); 1737 } 1738 1739 static void usb_mtp_get_data(MTPState *s, mtp_container *container, 1740 USBPacket *p) 1741 { 1742 MTPData *d = s->data_out; 1743 uint64_t dlen; 1744 uint32_t data_len = p->iov.size; 1745 uint64_t total_len; 1746 1747 if (!d) { 1748 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, 0, 1749 0, 0, 0, 0); 1750 return; 1751 } 1752 if (d->first) { 1753 /* Total length of incoming data */ 1754 total_len = cpu_to_le32(container->length) - sizeof(mtp_container); 1755 /* Length of data in this packet */ 1756 data_len -= sizeof(mtp_container); 1757 usb_mtp_realloc(d, total_len); 1758 d->length += total_len; 1759 d->offset = 0; 1760 d->cached_length = total_len; 1761 d->first = false; 1762 d->pending = false; 1763 } 1764 1765 if (d->pending) { 1766 usb_mtp_realloc(d, d->cached_length); 1767 d->length += d->cached_length; 1768 d->pending = false; 1769 } 1770 1771 if (d->length - d->offset > data_len) { 1772 dlen = data_len; 1773 } else { 1774 dlen = d->length - d->offset; 1775 /* Check for cached data for large files */ 1776 if ((s->dataset.size == 0xFFFFFFFF) && (dlen < p->iov.size)) { 1777 usb_mtp_realloc(d, p->iov.size - dlen); 1778 d->length += p->iov.size - dlen; 1779 dlen = p->iov.size; 1780 } 1781 } 1782 1783 switch (d->code) { 1784 case CMD_SEND_OBJECT_INFO: 1785 usb_packet_copy(p, d->data + d->offset, dlen); 1786 d->offset += dlen; 1787 if (d->offset == d->length) { 1788 /* The operation might have already failed */ 1789 if (!s->result) { 1790 usb_mtp_write_metadata(s); 1791 } 1792 usb_mtp_data_free(s->data_out); 1793 s->data_out = NULL; 1794 return; 1795 } 1796 break; 1797 case CMD_SEND_OBJECT: 1798 usb_packet_copy(p, d->data + d->offset, dlen); 1799 d->offset += dlen; 1800 if ((p->iov.size % 64) || !p->iov.size) { 1801 assert((s->dataset.size == 0xFFFFFFFF) || 1802 (s->dataset.size == d->length)); 1803 1804 usb_mtp_write_data(s); 1805 usb_mtp_data_free(s->data_out); 1806 s->data_out = NULL; 1807 return; 1808 } 1809 if (d->offset == d->length) { 1810 d->pending = true; 1811 } 1812 break; 1813 default: 1814 p->status = USB_RET_STALL; 1815 return; 1816 } 1817 } 1818 1819 static void usb_mtp_handle_data(USBDevice *dev, USBPacket *p) 1820 { 1821 MTPState *s = USB_MTP(dev); 1822 MTPControl cmd; 1823 mtp_container container; 1824 uint32_t params[5]; 1825 uint16_t container_type; 1826 int i, rc; 1827 1828 switch (p->ep->nr) { 1829 case EP_DATA_IN: 1830 if (s->data_out != NULL) { 1831 /* guest bug */ 1832 trace_usb_mtp_stall(s->dev.addr, "awaiting data-out"); 1833 p->status = USB_RET_STALL; 1834 return; 1835 } 1836 if (p->iov.size < sizeof(container)) { 1837 trace_usb_mtp_stall(s->dev.addr, "packet too small"); 1838 p->status = USB_RET_STALL; 1839 return; 1840 } 1841 if (s->data_in != NULL) { 1842 MTPData *d = s->data_in; 1843 uint64_t dlen = d->length - d->offset; 1844 if (d->first) { 1845 trace_usb_mtp_data_in(s->dev.addr, d->trans, d->length); 1846 if (d->length + sizeof(container) > 0xFFFFFFFF) { 1847 container.length = cpu_to_le32(0xFFFFFFFF); 1848 } else { 1849 container.length = 1850 cpu_to_le32(d->length + sizeof(container)); 1851 } 1852 container.type = cpu_to_le16(TYPE_DATA); 1853 container.code = cpu_to_le16(d->code); 1854 container.trans = cpu_to_le32(d->trans); 1855 usb_packet_copy(p, &container, sizeof(container)); 1856 d->first = false; 1857 if (dlen > p->iov.size - sizeof(container)) { 1858 dlen = p->iov.size - sizeof(container); 1859 } 1860 } else { 1861 if (dlen > p->iov.size) { 1862 dlen = p->iov.size; 1863 } 1864 } 1865 if (d->fd == -1) { 1866 usb_packet_copy(p, d->data + d->offset, dlen); 1867 } else { 1868 if (d->alloc < p->iov.size) { 1869 d->alloc = p->iov.size; 1870 d->data = g_realloc(d->data, d->alloc); 1871 } 1872 rc = read(d->fd, d->data, dlen); 1873 if (rc != dlen) { 1874 memset(d->data, 0, dlen); 1875 s->result->code = RES_INCOMPLETE_TRANSFER; 1876 } 1877 usb_packet_copy(p, d->data, dlen); 1878 } 1879 d->offset += dlen; 1880 if (d->offset == d->length) { 1881 usb_mtp_data_free(s->data_in); 1882 s->data_in = NULL; 1883 } 1884 } else if (s->result != NULL) { 1885 MTPControl *r = s->result; 1886 int length = sizeof(container) + r->argc * sizeof(uint32_t); 1887 if (r->code == RES_OK) { 1888 trace_usb_mtp_success(s->dev.addr, r->trans, 1889 (r->argc > 0) ? r->argv[0] : 0, 1890 (r->argc > 1) ? r->argv[1] : 0); 1891 } else { 1892 trace_usb_mtp_error(s->dev.addr, r->code, r->trans, 1893 (r->argc > 0) ? r->argv[0] : 0, 1894 (r->argc > 1) ? r->argv[1] : 0); 1895 } 1896 container.length = cpu_to_le32(length); 1897 container.type = cpu_to_le16(TYPE_RESPONSE); 1898 container.code = cpu_to_le16(r->code); 1899 container.trans = cpu_to_le32(r->trans); 1900 for (i = 0; i < r->argc; i++) { 1901 params[i] = cpu_to_le32(r->argv[i]); 1902 } 1903 usb_packet_copy(p, &container, sizeof(container)); 1904 usb_packet_copy(p, ¶ms, length - sizeof(container)); 1905 g_free(s->result); 1906 s->result = NULL; 1907 } 1908 break; 1909 case EP_DATA_OUT: 1910 if (p->iov.size < sizeof(container)) { 1911 trace_usb_mtp_stall(s->dev.addr, "packet too small"); 1912 p->status = USB_RET_STALL; 1913 return; 1914 } 1915 if ((s->data_out != NULL) && !s->data_out->first) { 1916 container_type = TYPE_DATA; 1917 } else { 1918 usb_packet_copy(p, &container, sizeof(container)); 1919 container_type = le16_to_cpu(container.type); 1920 } 1921 switch (container_type) { 1922 case TYPE_COMMAND: 1923 if (s->data_in || s->data_out || s->result) { 1924 trace_usb_mtp_stall(s->dev.addr, "transaction inflight"); 1925 p->status = USB_RET_STALL; 1926 return; 1927 } 1928 cmd.code = le16_to_cpu(container.code); 1929 cmd.argc = (le32_to_cpu(container.length) - sizeof(container)) 1930 / sizeof(uint32_t); 1931 cmd.trans = le32_to_cpu(container.trans); 1932 if (cmd.argc > ARRAY_SIZE(cmd.argv)) { 1933 cmd.argc = ARRAY_SIZE(cmd.argv); 1934 } 1935 if (p->iov.size < sizeof(container) + cmd.argc * sizeof(uint32_t)) { 1936 trace_usb_mtp_stall(s->dev.addr, "packet too small"); 1937 p->status = USB_RET_STALL; 1938 return; 1939 } 1940 usb_packet_copy(p, ¶ms, cmd.argc * sizeof(uint32_t)); 1941 for (i = 0; i < cmd.argc; i++) { 1942 cmd.argv[i] = le32_to_cpu(params[i]); 1943 } 1944 trace_usb_mtp_command(s->dev.addr, cmd.code, cmd.trans, 1945 (cmd.argc > 0) ? cmd.argv[0] : 0, 1946 (cmd.argc > 1) ? cmd.argv[1] : 0, 1947 (cmd.argc > 2) ? cmd.argv[2] : 0, 1948 (cmd.argc > 3) ? cmd.argv[3] : 0, 1949 (cmd.argc > 4) ? cmd.argv[4] : 0); 1950 usb_mtp_command(s, &cmd); 1951 break; 1952 case TYPE_DATA: 1953 /* One of the previous transfers has already errored but the 1954 * responder is still sending data associated with it 1955 */ 1956 if (s->result != NULL) { 1957 return; 1958 } 1959 usb_mtp_get_data(s, &container, p); 1960 break; 1961 default: 1962 /* not needed as long as the mtp device is read-only */ 1963 p->status = USB_RET_STALL; 1964 return; 1965 } 1966 break; 1967 case EP_EVENT: 1968 #ifdef CONFIG_INOTIFY1 1969 if (!QTAILQ_EMPTY(&s->events)) { 1970 struct MTPMonEntry *e = QTAILQ_LAST(&s->events, events); 1971 uint32_t handle; 1972 int len = sizeof(container) + sizeof(uint32_t); 1973 1974 if (p->iov.size < len) { 1975 trace_usb_mtp_stall(s->dev.addr, 1976 "packet too small to send event"); 1977 p->status = USB_RET_STALL; 1978 return; 1979 } 1980 1981 QTAILQ_REMOVE(&s->events, e, next); 1982 container.length = cpu_to_le32(len); 1983 container.type = cpu_to_le32(TYPE_EVENT); 1984 container.code = cpu_to_le16(e->event); 1985 container.trans = 0; /* no trans specific events */ 1986 handle = cpu_to_le32(e->handle); 1987 usb_packet_copy(p, &container, sizeof(container)); 1988 usb_packet_copy(p, &handle, sizeof(uint32_t)); 1989 g_free(e); 1990 return; 1991 } 1992 #endif 1993 p->status = USB_RET_NAK; 1994 return; 1995 default: 1996 trace_usb_mtp_stall(s->dev.addr, "invalid endpoint"); 1997 p->status = USB_RET_STALL; 1998 return; 1999 } 2000 2001 if (p->actual_length == 0) { 2002 trace_usb_mtp_nak(s->dev.addr, p->ep->nr); 2003 p->status = USB_RET_NAK; 2004 return; 2005 } else { 2006 trace_usb_mtp_xfer(s->dev.addr, p->ep->nr, p->actual_length, 2007 p->iov.size); 2008 return; 2009 } 2010 } 2011 2012 static void usb_mtp_realize(USBDevice *dev, Error **errp) 2013 { 2014 MTPState *s = USB_MTP(dev); 2015 2016 usb_desc_create_serial(dev); 2017 usb_desc_init(dev); 2018 QTAILQ_INIT(&s->objects); 2019 if (s->desc == NULL) { 2020 if (s->root == NULL) { 2021 error_setg(errp, "usb-mtp: rootdir property must be configured"); 2022 return; 2023 } 2024 s->desc = strrchr(s->root, '/'); 2025 if (s->desc && s->desc[0]) { 2026 s->desc = g_strdup(s->desc + 1); 2027 } else { 2028 s->desc = g_strdup("none"); 2029 } 2030 } 2031 /* Mark store as RW */ 2032 if (!s->readonly) { 2033 s->flags |= (1 << MTP_FLAG_WRITABLE); 2034 } 2035 2036 } 2037 2038 static const VMStateDescription vmstate_usb_mtp = { 2039 .name = "usb-mtp", 2040 .unmigratable = 1, 2041 .version_id = 1, 2042 .minimum_version_id = 1, 2043 .fields = (VMStateField[]) { 2044 VMSTATE_USB_DEVICE(dev, MTPState), 2045 VMSTATE_END_OF_LIST() 2046 } 2047 }; 2048 2049 static Property mtp_properties[] = { 2050 DEFINE_PROP_STRING("rootdir", MTPState, root), 2051 DEFINE_PROP_STRING("desc", MTPState, desc), 2052 DEFINE_PROP_BOOL("readonly", MTPState, readonly, true), 2053 DEFINE_PROP_END_OF_LIST(), 2054 }; 2055 2056 static void usb_mtp_class_initfn(ObjectClass *klass, void *data) 2057 { 2058 DeviceClass *dc = DEVICE_CLASS(klass); 2059 USBDeviceClass *uc = USB_DEVICE_CLASS(klass); 2060 2061 uc->realize = usb_mtp_realize; 2062 uc->product_desc = "QEMU USB MTP"; 2063 uc->usb_desc = &desc; 2064 uc->cancel_packet = usb_mtp_cancel_packet; 2065 uc->handle_attach = usb_desc_attach; 2066 uc->handle_reset = usb_mtp_handle_reset; 2067 uc->handle_control = usb_mtp_handle_control; 2068 uc->handle_data = usb_mtp_handle_data; 2069 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 2070 dc->desc = "USB Media Transfer Protocol device"; 2071 dc->fw_name = "mtp"; 2072 dc->vmsd = &vmstate_usb_mtp; 2073 dc->props = mtp_properties; 2074 } 2075 2076 static TypeInfo mtp_info = { 2077 .name = TYPE_USB_MTP, 2078 .parent = TYPE_USB_DEVICE, 2079 .instance_size = sizeof(MTPState), 2080 .class_init = usb_mtp_class_initfn, 2081 }; 2082 2083 static void usb_mtp_register_types(void) 2084 { 2085 type_register_static(&mtp_info); 2086 } 2087 2088 type_init(usb_mtp_register_types) 2089