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 #include "qemu/units.h" 29 30 /* ----------------------------------------------------------------------- */ 31 32 enum mtp_container_type { 33 TYPE_COMMAND = 1, 34 TYPE_DATA = 2, 35 TYPE_RESPONSE = 3, 36 TYPE_EVENT = 4, 37 }; 38 39 /* MTP write stage, for internal use only */ 40 enum mtp_write_status { 41 WRITE_START = 1, 42 WRITE_CONTINUE = 2, 43 WRITE_END = 3, 44 }; 45 46 enum mtp_code { 47 /* command codes */ 48 CMD_GET_DEVICE_INFO = 0x1001, 49 CMD_OPEN_SESSION = 0x1002, 50 CMD_CLOSE_SESSION = 0x1003, 51 CMD_GET_STORAGE_IDS = 0x1004, 52 CMD_GET_STORAGE_INFO = 0x1005, 53 CMD_GET_NUM_OBJECTS = 0x1006, 54 CMD_GET_OBJECT_HANDLES = 0x1007, 55 CMD_GET_OBJECT_INFO = 0x1008, 56 CMD_GET_OBJECT = 0x1009, 57 CMD_DELETE_OBJECT = 0x100b, 58 CMD_SEND_OBJECT_INFO = 0x100c, 59 CMD_SEND_OBJECT = 0x100d, 60 CMD_GET_PARTIAL_OBJECT = 0x101b, 61 CMD_GET_OBJECT_PROPS_SUPPORTED = 0x9801, 62 CMD_GET_OBJECT_PROP_DESC = 0x9802, 63 CMD_GET_OBJECT_PROP_VALUE = 0x9803, 64 65 /* response codes */ 66 RES_OK = 0x2001, 67 RES_GENERAL_ERROR = 0x2002, 68 RES_SESSION_NOT_OPEN = 0x2003, 69 RES_INVALID_TRANSACTION_ID = 0x2004, 70 RES_OPERATION_NOT_SUPPORTED = 0x2005, 71 RES_PARAMETER_NOT_SUPPORTED = 0x2006, 72 RES_INCOMPLETE_TRANSFER = 0x2007, 73 RES_INVALID_STORAGE_ID = 0x2008, 74 RES_INVALID_OBJECT_HANDLE = 0x2009, 75 RES_INVALID_OBJECT_FORMAT_CODE = 0x200b, 76 RES_STORE_FULL = 0x200c, 77 RES_STORE_READ_ONLY = 0x200e, 78 RES_PARTIAL_DELETE = 0x2012, 79 RES_STORE_NOT_AVAILABLE = 0x2013, 80 RES_SPEC_BY_FORMAT_UNSUPPORTED = 0x2014, 81 RES_INVALID_OBJECTINFO = 0x2015, 82 RES_DESTINATION_UNSUPPORTED = 0x2020, 83 RES_INVALID_PARENT_OBJECT = 0x201a, 84 RES_INVALID_PARAMETER = 0x201d, 85 RES_SESSION_ALREADY_OPEN = 0x201e, 86 RES_INVALID_OBJECT_PROP_CODE = 0xA801, 87 88 /* format codes */ 89 FMT_UNDEFINED_OBJECT = 0x3000, 90 FMT_ASSOCIATION = 0x3001, 91 92 /* event codes */ 93 EVT_CANCEL_TRANSACTION = 0x4001, 94 EVT_OBJ_ADDED = 0x4002, 95 EVT_OBJ_REMOVED = 0x4003, 96 EVT_OBJ_INFO_CHANGED = 0x4007, 97 98 /* object properties */ 99 PROP_STORAGE_ID = 0xDC01, 100 PROP_OBJECT_FORMAT = 0xDC02, 101 PROP_OBJECT_COMPRESSED_SIZE = 0xDC04, 102 PROP_PARENT_OBJECT = 0xDC0B, 103 PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER = 0xDC41, 104 PROP_NAME = 0xDC44, 105 }; 106 107 enum mtp_data_type { 108 DATA_TYPE_UINT16 = 0x0004, 109 DATA_TYPE_UINT32 = 0x0006, 110 DATA_TYPE_UINT64 = 0x0008, 111 DATA_TYPE_UINT128 = 0x000a, 112 DATA_TYPE_STRING = 0xffff, 113 }; 114 115 typedef struct { 116 uint32_t length; 117 uint16_t type; 118 uint16_t code; 119 uint32_t trans; 120 } QEMU_PACKED mtp_container; 121 122 /* ----------------------------------------------------------------------- */ 123 124 typedef struct MTPState MTPState; 125 typedef struct MTPControl MTPControl; 126 typedef struct MTPData MTPData; 127 typedef struct MTPObject MTPObject; 128 129 enum { 130 EP_DATA_IN = 1, 131 EP_DATA_OUT, 132 EP_EVENT, 133 }; 134 135 #ifdef CONFIG_INOTIFY1 136 typedef struct MTPMonEntry MTPMonEntry; 137 138 struct MTPMonEntry { 139 uint32_t event; 140 uint32_t handle; 141 142 QTAILQ_ENTRY(MTPMonEntry) next; 143 }; 144 #endif 145 146 struct MTPControl { 147 uint16_t code; 148 uint32_t trans; 149 int argc; 150 uint32_t argv[5]; 151 }; 152 153 struct MTPData { 154 uint16_t code; 155 uint32_t trans; 156 uint64_t offset; 157 uint64_t length; 158 uint64_t alloc; 159 uint8_t *data; 160 bool first; 161 /* Used for >4G file sizes */ 162 bool pending; 163 int fd; 164 uint8_t write_status; 165 /* Internal pointer per every MTP_WRITE_BUF_SZ */ 166 uint64_t data_offset; 167 }; 168 169 struct MTPObject { 170 uint32_t handle; 171 uint16_t format; 172 char *name; 173 char *path; 174 struct stat stat; 175 #ifdef CONFIG_INOTIFY1 176 /* inotify watch cookie */ 177 int watchfd; 178 #endif 179 MTPObject *parent; 180 uint32_t nchildren; 181 QLIST_HEAD(, MTPObject) children; 182 QLIST_ENTRY(MTPObject) list; 183 bool have_children; 184 QTAILQ_ENTRY(MTPObject) next; 185 }; 186 187 struct MTPState { 188 USBDevice dev; 189 char *root; 190 char *desc; 191 uint32_t flags; 192 193 MTPData *data_in; 194 MTPData *data_out; 195 MTPControl *result; 196 uint32_t session; 197 uint32_t next_handle; 198 bool readonly; 199 200 QTAILQ_HEAD(, MTPObject) objects; 201 #ifdef CONFIG_INOTIFY1 202 /* inotify descriptor */ 203 int inotifyfd; 204 QTAILQ_HEAD(, MTPMonEntry) events; 205 #endif 206 /* Responder is expecting a write operation */ 207 bool write_pending; 208 struct { 209 uint32_t parent_handle; 210 uint16_t format; 211 uint32_t size; 212 char *filename; 213 } dataset; 214 }; 215 216 /* 217 * ObjectInfo dataset received from initiator 218 * Fields we don't care about are ignored 219 */ 220 typedef struct { 221 uint32_t storage_id; /*unused*/ 222 uint16_t format; 223 uint16_t protection_status; /*unused*/ 224 uint32_t size; 225 uint16_t thumb_format; /*unused*/ 226 uint32_t thumb_comp_sz; /*unused*/ 227 uint32_t thumb_pix_width; /*unused*/ 228 uint32_t thumb_pix_height; /*unused*/ 229 uint32_t image_pix_width; /*unused*/ 230 uint32_t image_pix_height; /*unused*/ 231 uint32_t image_bit_depth; /*unused*/ 232 uint32_t parent; /*unused*/ 233 uint16_t assoc_type; 234 uint32_t assoc_desc; 235 uint32_t seq_no; /*unused*/ 236 uint8_t length; /*part of filename field*/ 237 uint16_t filename[0]; 238 char date_created[0]; /*unused*/ 239 char date_modified[0]; /*unused*/ 240 char keywords[0]; /*unused*/ 241 /* string and other data follows */ 242 } QEMU_PACKED ObjectInfo; 243 244 #define TYPE_USB_MTP "usb-mtp" 245 #define USB_MTP(obj) OBJECT_CHECK(MTPState, (obj), TYPE_USB_MTP) 246 247 #define QEMU_STORAGE_ID 0x00010001 248 249 #define MTP_FLAG_WRITABLE 0 250 251 #define FLAG_SET(_mtp, _flag) ((_mtp)->flags & (1 << (_flag))) 252 253 /* ----------------------------------------------------------------------- */ 254 255 #define MTP_MANUFACTURER "QEMU" 256 #define MTP_PRODUCT "QEMU filesharing" 257 #define MTP_WRITE_BUF_SZ (512 * KiB) 258 259 enum { 260 STR_MANUFACTURER = 1, 261 STR_PRODUCT, 262 STR_SERIALNUMBER, 263 STR_MTP, 264 STR_CONFIG_FULL, 265 STR_CONFIG_HIGH, 266 STR_CONFIG_SUPER, 267 }; 268 269 static const USBDescStrings desc_strings = { 270 [STR_MANUFACTURER] = MTP_MANUFACTURER, 271 [STR_PRODUCT] = MTP_PRODUCT, 272 [STR_SERIALNUMBER] = "34617", 273 [STR_MTP] = "MTP", 274 [STR_CONFIG_FULL] = "Full speed config (usb 1.1)", 275 [STR_CONFIG_HIGH] = "High speed config (usb 2.0)", 276 [STR_CONFIG_SUPER] = "Super speed config (usb 3.0)", 277 }; 278 279 static const USBDescIface desc_iface_full = { 280 .bInterfaceNumber = 0, 281 .bNumEndpoints = 3, 282 .bInterfaceClass = USB_CLASS_STILL_IMAGE, 283 .bInterfaceSubClass = 0x01, 284 .bInterfaceProtocol = 0x01, 285 .iInterface = STR_MTP, 286 .eps = (USBDescEndpoint[]) { 287 { 288 .bEndpointAddress = USB_DIR_IN | EP_DATA_IN, 289 .bmAttributes = USB_ENDPOINT_XFER_BULK, 290 .wMaxPacketSize = 64, 291 },{ 292 .bEndpointAddress = USB_DIR_OUT | EP_DATA_OUT, 293 .bmAttributes = USB_ENDPOINT_XFER_BULK, 294 .wMaxPacketSize = 64, 295 },{ 296 .bEndpointAddress = USB_DIR_IN | EP_EVENT, 297 .bmAttributes = USB_ENDPOINT_XFER_INT, 298 .wMaxPacketSize = 64, 299 .bInterval = 0x0a, 300 }, 301 } 302 }; 303 304 static const USBDescDevice desc_device_full = { 305 .bcdUSB = 0x0200, 306 .bMaxPacketSize0 = 8, 307 .bNumConfigurations = 1, 308 .confs = (USBDescConfig[]) { 309 { 310 .bNumInterfaces = 1, 311 .bConfigurationValue = 1, 312 .iConfiguration = STR_CONFIG_FULL, 313 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP, 314 .bMaxPower = 2, 315 .nif = 1, 316 .ifs = &desc_iface_full, 317 }, 318 }, 319 }; 320 321 static const USBDescIface desc_iface_high = { 322 .bInterfaceNumber = 0, 323 .bNumEndpoints = 3, 324 .bInterfaceClass = USB_CLASS_STILL_IMAGE, 325 .bInterfaceSubClass = 0x01, 326 .bInterfaceProtocol = 0x01, 327 .iInterface = STR_MTP, 328 .eps = (USBDescEndpoint[]) { 329 { 330 .bEndpointAddress = USB_DIR_IN | EP_DATA_IN, 331 .bmAttributes = USB_ENDPOINT_XFER_BULK, 332 .wMaxPacketSize = 512, 333 },{ 334 .bEndpointAddress = USB_DIR_OUT | EP_DATA_OUT, 335 .bmAttributes = USB_ENDPOINT_XFER_BULK, 336 .wMaxPacketSize = 512, 337 },{ 338 .bEndpointAddress = USB_DIR_IN | EP_EVENT, 339 .bmAttributes = USB_ENDPOINT_XFER_INT, 340 .wMaxPacketSize = 64, 341 .bInterval = 0x0a, 342 }, 343 } 344 }; 345 346 static const USBDescDevice desc_device_high = { 347 .bcdUSB = 0x0200, 348 .bMaxPacketSize0 = 64, 349 .bNumConfigurations = 1, 350 .confs = (USBDescConfig[]) { 351 { 352 .bNumInterfaces = 1, 353 .bConfigurationValue = 1, 354 .iConfiguration = STR_CONFIG_HIGH, 355 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP, 356 .bMaxPower = 2, 357 .nif = 1, 358 .ifs = &desc_iface_high, 359 }, 360 }, 361 }; 362 363 static const USBDescMSOS desc_msos = { 364 .CompatibleID = "MTP", 365 .SelectiveSuspendEnabled = true, 366 }; 367 368 static const USBDesc desc = { 369 .id = { 370 .idVendor = 0x46f4, /* CRC16() of "QEMU" */ 371 .idProduct = 0x0004, 372 .bcdDevice = 0, 373 .iManufacturer = STR_MANUFACTURER, 374 .iProduct = STR_PRODUCT, 375 .iSerialNumber = STR_SERIALNUMBER, 376 }, 377 .full = &desc_device_full, 378 .high = &desc_device_high, 379 .str = desc_strings, 380 .msos = &desc_msos, 381 }; 382 383 /* ----------------------------------------------------------------------- */ 384 385 static MTPObject *usb_mtp_object_alloc(MTPState *s, uint32_t handle, 386 MTPObject *parent, char *name) 387 { 388 MTPObject *o = g_new0(MTPObject, 1); 389 390 if (name[0] == '.') { 391 goto ignore; 392 } 393 394 o->handle = handle; 395 o->parent = parent; 396 o->name = g_strdup(name); 397 if (parent == NULL) { 398 o->path = g_strdup(name); 399 } else { 400 o->path = g_strdup_printf("%s/%s", parent->path, name); 401 } 402 403 if (lstat(o->path, &o->stat) != 0) { 404 goto ignore; 405 } 406 if (S_ISREG(o->stat.st_mode)) { 407 o->format = FMT_UNDEFINED_OBJECT; 408 } else if (S_ISDIR(o->stat.st_mode)) { 409 o->format = FMT_ASSOCIATION; 410 } else { 411 goto ignore; 412 } 413 414 if (access(o->path, R_OK) != 0) { 415 goto ignore; 416 } 417 418 trace_usb_mtp_object_alloc(s->dev.addr, o->handle, o->path); 419 420 QTAILQ_INSERT_TAIL(&s->objects, o, next); 421 return o; 422 423 ignore: 424 g_free(o->name); 425 g_free(o->path); 426 g_free(o); 427 return NULL; 428 } 429 430 static void usb_mtp_object_free(MTPState *s, MTPObject *o) 431 { 432 MTPObject *iter; 433 434 if (!o) { 435 return; 436 } 437 438 trace_usb_mtp_object_free(s->dev.addr, o->handle, o->path); 439 440 QTAILQ_REMOVE(&s->objects, o, next); 441 if (o->parent) { 442 QLIST_REMOVE(o, list); 443 o->parent->nchildren--; 444 } 445 446 while (!QLIST_EMPTY(&o->children)) { 447 iter = QLIST_FIRST(&o->children); 448 usb_mtp_object_free(s, iter); 449 } 450 g_free(o->name); 451 g_free(o->path); 452 g_free(o); 453 } 454 455 static MTPObject *usb_mtp_object_lookup(MTPState *s, uint32_t handle) 456 { 457 MTPObject *o; 458 459 QTAILQ_FOREACH(o, &s->objects, next) { 460 if (o->handle == handle) { 461 return o; 462 } 463 } 464 return NULL; 465 } 466 467 static MTPObject *usb_mtp_add_child(MTPState *s, MTPObject *o, 468 char *name) 469 { 470 MTPObject *child = 471 usb_mtp_object_alloc(s, s->next_handle++, o, name); 472 473 if (child) { 474 trace_usb_mtp_add_child(s->dev.addr, child->handle, child->path); 475 QLIST_INSERT_HEAD(&o->children, child, list); 476 o->nchildren++; 477 478 if (child->format == FMT_ASSOCIATION) { 479 QLIST_INIT(&child->children); 480 } 481 } 482 483 return child; 484 } 485 486 static MTPObject *usb_mtp_object_lookup_name(MTPObject *parent, 487 char *name, int len) 488 { 489 MTPObject *iter; 490 491 QLIST_FOREACH(iter, &parent->children, list) { 492 if (strncmp(iter->name, name, len) == 0) { 493 return iter; 494 } 495 } 496 497 return NULL; 498 } 499 500 #ifdef CONFIG_INOTIFY1 501 static MTPObject *usb_mtp_object_lookup_wd(MTPState *s, int wd) 502 { 503 MTPObject *iter; 504 505 QTAILQ_FOREACH(iter, &s->objects, next) { 506 if (iter->watchfd == wd) { 507 return iter; 508 } 509 } 510 511 return NULL; 512 } 513 514 static void inotify_watchfn(void *arg) 515 { 516 MTPState *s = arg; 517 ssize_t bytes; 518 /* From the man page: atleast one event can be read */ 519 int pos; 520 char buf[sizeof(struct inotify_event) + NAME_MAX + 1]; 521 522 for (;;) { 523 bytes = read(s->inotifyfd, buf, sizeof(buf)); 524 pos = 0; 525 526 if (bytes <= 0) { 527 /* Better luck next time */ 528 return; 529 } 530 531 /* 532 * TODO: Ignore initiator initiated events. 533 * For now we are good because the store is RO 534 */ 535 while (bytes > 0) { 536 char *p = buf + pos; 537 struct inotify_event *event = (struct inotify_event *)p; 538 int watchfd = 0; 539 uint32_t mask = event->mask & (IN_CREATE | IN_DELETE | 540 IN_MODIFY | IN_IGNORED); 541 MTPObject *parent = usb_mtp_object_lookup_wd(s, event->wd); 542 MTPMonEntry *entry = NULL; 543 MTPObject *o; 544 545 pos = pos + sizeof(struct inotify_event) + event->len; 546 bytes = bytes - pos; 547 548 if (!parent) { 549 continue; 550 } 551 552 switch (mask) { 553 case IN_CREATE: 554 if (usb_mtp_object_lookup_name 555 (parent, event->name, event->len)) { 556 /* Duplicate create event */ 557 continue; 558 } 559 entry = g_new0(MTPMonEntry, 1); 560 entry->handle = s->next_handle; 561 entry->event = EVT_OBJ_ADDED; 562 o = usb_mtp_add_child(s, parent, event->name); 563 if (!o) { 564 g_free(entry); 565 continue; 566 } 567 o->watchfd = watchfd; 568 trace_usb_mtp_inotify_event(s->dev.addr, event->name, 569 event->mask, "Obj Added"); 570 break; 571 572 case IN_DELETE: 573 /* 574 * The kernel issues a IN_IGNORED event 575 * when a dir containing a watchpoint is 576 * deleted, so we don't have to delete the 577 * watchpoint 578 */ 579 o = usb_mtp_object_lookup_name(parent, event->name, event->len); 580 if (!o) { 581 continue; 582 } 583 entry = g_new0(MTPMonEntry, 1); 584 entry->handle = o->handle; 585 entry->event = EVT_OBJ_REMOVED; 586 trace_usb_mtp_inotify_event(s->dev.addr, o->path, 587 event->mask, "Obj Deleted"); 588 usb_mtp_object_free(s, o); 589 break; 590 591 case IN_MODIFY: 592 o = usb_mtp_object_lookup_name(parent, event->name, event->len); 593 if (!o) { 594 continue; 595 } 596 entry = g_new0(MTPMonEntry, 1); 597 entry->handle = o->handle; 598 entry->event = EVT_OBJ_INFO_CHANGED; 599 trace_usb_mtp_inotify_event(s->dev.addr, o->path, 600 event->mask, "Obj Modified"); 601 break; 602 603 case IN_IGNORED: 604 trace_usb_mtp_inotify_event(s->dev.addr, parent->path, 605 event->mask, "Obj parent dir ignored"); 606 break; 607 608 default: 609 fprintf(stderr, "usb-mtp: failed to parse inotify event\n"); 610 continue; 611 } 612 613 if (entry) { 614 QTAILQ_INSERT_HEAD(&s->events, entry, next); 615 } 616 } 617 } 618 } 619 620 static int usb_mtp_inotify_init(MTPState *s) 621 { 622 int fd; 623 624 fd = inotify_init1(IN_NONBLOCK); 625 if (fd == -1) { 626 return 1; 627 } 628 629 QTAILQ_INIT(&s->events); 630 s->inotifyfd = fd; 631 632 qemu_set_fd_handler(fd, inotify_watchfn, NULL, s); 633 634 return 0; 635 } 636 637 static void usb_mtp_inotify_cleanup(MTPState *s) 638 { 639 MTPMonEntry *e, *p; 640 641 if (!s->inotifyfd) { 642 return; 643 } 644 645 qemu_set_fd_handler(s->inotifyfd, NULL, NULL, s); 646 close(s->inotifyfd); 647 648 QTAILQ_FOREACH_SAFE(e, &s->events, next, p) { 649 QTAILQ_REMOVE(&s->events, e, next); 650 g_free(e); 651 } 652 } 653 654 static int usb_mtp_add_watch(int inotifyfd, char *path) 655 { 656 uint32_t mask = IN_CREATE | IN_DELETE | IN_MODIFY | 657 IN_ISDIR; 658 659 return inotify_add_watch(inotifyfd, path, mask); 660 } 661 #endif 662 663 static void usb_mtp_object_readdir(MTPState *s, MTPObject *o) 664 { 665 struct dirent *entry; 666 DIR *dir; 667 int fd; 668 669 if (o->have_children) { 670 return; 671 } 672 o->have_children = true; 673 674 fd = open(o->path, O_DIRECTORY | O_CLOEXEC | O_NOFOLLOW); 675 if (fd < 0) { 676 return; 677 } 678 dir = fdopendir(fd); 679 if (!dir) { 680 close(fd); 681 return; 682 } 683 #ifdef CONFIG_INOTIFY1 684 int watchfd = usb_mtp_add_watch(s->inotifyfd, o->path); 685 if (watchfd == -1) { 686 fprintf(stderr, "usb-mtp: failed to add watch for %s\n", o->path); 687 } else { 688 trace_usb_mtp_inotify_event(s->dev.addr, o->path, 689 0, "Watch Added"); 690 o->watchfd = watchfd; 691 } 692 #endif 693 while ((entry = readdir(dir)) != NULL) { 694 usb_mtp_add_child(s, o, entry->d_name); 695 } 696 closedir(dir); 697 } 698 699 /* ----------------------------------------------------------------------- */ 700 701 static MTPData *usb_mtp_data_alloc(MTPControl *c) 702 { 703 MTPData *data = g_new0(MTPData, 1); 704 705 data->code = c->code; 706 data->trans = c->trans; 707 data->fd = -1; 708 data->first = true; 709 return data; 710 } 711 712 static void usb_mtp_data_free(MTPData *data) 713 { 714 if (data == NULL) { 715 return; 716 } 717 if (data->fd != -1) { 718 close(data->fd); 719 } 720 g_free(data->data); 721 g_free(data); 722 } 723 724 static void usb_mtp_realloc(MTPData *data, uint32_t bytes) 725 { 726 if (data->length + bytes <= data->alloc) { 727 return; 728 } 729 data->alloc = (data->length + bytes + 0xff) & ~0xff; 730 data->data = g_realloc(data->data, data->alloc); 731 } 732 733 static void usb_mtp_add_u8(MTPData *data, uint8_t val) 734 { 735 usb_mtp_realloc(data, 1); 736 data->data[data->length++] = val; 737 } 738 739 static void usb_mtp_add_u16(MTPData *data, uint16_t val) 740 { 741 usb_mtp_realloc(data, 2); 742 data->data[data->length++] = (val >> 0) & 0xff; 743 data->data[data->length++] = (val >> 8) & 0xff; 744 } 745 746 static void usb_mtp_add_u32(MTPData *data, uint32_t val) 747 { 748 usb_mtp_realloc(data, 4); 749 data->data[data->length++] = (val >> 0) & 0xff; 750 data->data[data->length++] = (val >> 8) & 0xff; 751 data->data[data->length++] = (val >> 16) & 0xff; 752 data->data[data->length++] = (val >> 24) & 0xff; 753 } 754 755 static void usb_mtp_add_u64(MTPData *data, uint64_t val) 756 { 757 usb_mtp_realloc(data, 8); 758 data->data[data->length++] = (val >> 0) & 0xff; 759 data->data[data->length++] = (val >> 8) & 0xff; 760 data->data[data->length++] = (val >> 16) & 0xff; 761 data->data[data->length++] = (val >> 24) & 0xff; 762 data->data[data->length++] = (val >> 32) & 0xff; 763 data->data[data->length++] = (val >> 40) & 0xff; 764 data->data[data->length++] = (val >> 48) & 0xff; 765 data->data[data->length++] = (val >> 56) & 0xff; 766 } 767 768 static void usb_mtp_add_u16_array(MTPData *data, uint32_t len, 769 const uint16_t *vals) 770 { 771 int i; 772 773 usb_mtp_add_u32(data, len); 774 for (i = 0; i < len; i++) { 775 usb_mtp_add_u16(data, vals[i]); 776 } 777 } 778 779 static void usb_mtp_add_u32_array(MTPData *data, uint32_t len, 780 const uint32_t *vals) 781 { 782 int i; 783 784 usb_mtp_add_u32(data, len); 785 for (i = 0; i < len; i++) { 786 usb_mtp_add_u32(data, vals[i]); 787 } 788 } 789 790 static void usb_mtp_add_wstr(MTPData *data, const wchar_t *str) 791 { 792 uint32_t len = wcslen(str); 793 int i; 794 795 if (len > 0) { 796 len++; /* include terminating L'\0' */ 797 } 798 799 usb_mtp_add_u8(data, len); 800 for (i = 0; i < len; i++) { 801 usb_mtp_add_u16(data, str[i]); 802 } 803 } 804 805 static void usb_mtp_add_str(MTPData *data, const char *str) 806 { 807 uint32_t len = strlen(str)+1; 808 wchar_t *wstr = g_new(wchar_t, len); 809 size_t ret; 810 811 ret = mbstowcs(wstr, str, len); 812 if (ret == -1) { 813 usb_mtp_add_wstr(data, L"Oops"); 814 } else { 815 usb_mtp_add_wstr(data, wstr); 816 } 817 818 g_free(wstr); 819 } 820 821 static void usb_mtp_add_time(MTPData *data, time_t time) 822 { 823 char buf[16]; 824 struct tm tm; 825 826 gmtime_r(&time, &tm); 827 strftime(buf, sizeof(buf), "%Y%m%dT%H%M%S", &tm); 828 usb_mtp_add_str(data, buf); 829 } 830 831 /* ----------------------------------------------------------------------- */ 832 833 static void usb_mtp_queue_result(MTPState *s, uint16_t code, uint32_t trans, 834 int argc, uint32_t arg0, uint32_t arg1, 835 uint32_t arg2) 836 { 837 MTPControl *c = g_new0(MTPControl, 1); 838 839 c->code = code; 840 c->trans = trans; 841 c->argc = argc; 842 if (argc > 0) { 843 c->argv[0] = arg0; 844 } 845 if (argc > 1) { 846 c->argv[1] = arg1; 847 } 848 if (argc > 2) { 849 c->argv[2] = arg2; 850 } 851 852 assert(s->result == NULL); 853 s->result = c; 854 } 855 856 /* ----------------------------------------------------------------------- */ 857 858 static MTPData *usb_mtp_get_device_info(MTPState *s, MTPControl *c) 859 { 860 static const uint16_t ops[] = { 861 CMD_GET_DEVICE_INFO, 862 CMD_OPEN_SESSION, 863 CMD_CLOSE_SESSION, 864 CMD_GET_STORAGE_IDS, 865 CMD_GET_STORAGE_INFO, 866 CMD_GET_NUM_OBJECTS, 867 CMD_GET_OBJECT_HANDLES, 868 CMD_GET_OBJECT_INFO, 869 CMD_DELETE_OBJECT, 870 CMD_SEND_OBJECT_INFO, 871 CMD_SEND_OBJECT, 872 CMD_GET_OBJECT, 873 CMD_GET_PARTIAL_OBJECT, 874 CMD_GET_OBJECT_PROPS_SUPPORTED, 875 CMD_GET_OBJECT_PROP_DESC, 876 CMD_GET_OBJECT_PROP_VALUE, 877 }; 878 static const uint16_t fmt[] = { 879 FMT_UNDEFINED_OBJECT, 880 FMT_ASSOCIATION, 881 }; 882 MTPData *d = usb_mtp_data_alloc(c); 883 884 trace_usb_mtp_op_get_device_info(s->dev.addr); 885 886 usb_mtp_add_u16(d, 100); 887 usb_mtp_add_u32(d, 0x00000006); 888 usb_mtp_add_u16(d, 0x0064); 889 usb_mtp_add_wstr(d, L""); 890 usb_mtp_add_u16(d, 0x0000); 891 892 usb_mtp_add_u16_array(d, ARRAY_SIZE(ops), ops); 893 usb_mtp_add_u16_array(d, 0, NULL); 894 usb_mtp_add_u16_array(d, 0, NULL); 895 usb_mtp_add_u16_array(d, 0, NULL); 896 usb_mtp_add_u16_array(d, ARRAY_SIZE(fmt), fmt); 897 898 usb_mtp_add_wstr(d, L"" MTP_MANUFACTURER); 899 usb_mtp_add_wstr(d, L"" MTP_PRODUCT); 900 usb_mtp_add_wstr(d, L"0.1"); 901 usb_mtp_add_wstr(d, L"0123456789abcdef0123456789abcdef"); 902 903 return d; 904 } 905 906 static MTPData *usb_mtp_get_storage_ids(MTPState *s, MTPControl *c) 907 { 908 static const uint32_t ids[] = { 909 QEMU_STORAGE_ID, 910 }; 911 MTPData *d = usb_mtp_data_alloc(c); 912 913 trace_usb_mtp_op_get_storage_ids(s->dev.addr); 914 915 usb_mtp_add_u32_array(d, ARRAY_SIZE(ids), ids); 916 917 return d; 918 } 919 920 static MTPData *usb_mtp_get_storage_info(MTPState *s, MTPControl *c) 921 { 922 MTPData *d = usb_mtp_data_alloc(c); 923 struct statvfs buf; 924 int rc; 925 926 trace_usb_mtp_op_get_storage_info(s->dev.addr); 927 928 if (FLAG_SET(s, MTP_FLAG_WRITABLE)) { 929 usb_mtp_add_u16(d, 0x0003); 930 usb_mtp_add_u16(d, 0x0002); 931 usb_mtp_add_u16(d, 0x0000); 932 } else { 933 usb_mtp_add_u16(d, 0x0001); 934 usb_mtp_add_u16(d, 0x0002); 935 usb_mtp_add_u16(d, 0x0001); 936 } 937 938 rc = statvfs(s->root, &buf); 939 if (rc == 0) { 940 usb_mtp_add_u64(d, (uint64_t)buf.f_frsize * buf.f_blocks); 941 usb_mtp_add_u64(d, (uint64_t)buf.f_bavail * buf.f_blocks); 942 usb_mtp_add_u32(d, buf.f_ffree); 943 } else { 944 usb_mtp_add_u64(d, 0xffffffff); 945 usb_mtp_add_u64(d, 0xffffffff); 946 usb_mtp_add_u32(d, 0xffffffff); 947 } 948 949 usb_mtp_add_str(d, s->desc); 950 usb_mtp_add_wstr(d, L"123456789abcdef"); 951 return d; 952 } 953 954 static MTPData *usb_mtp_get_object_handles(MTPState *s, MTPControl *c, 955 MTPObject *o) 956 { 957 MTPData *d = usb_mtp_data_alloc(c); 958 uint32_t i = 0, handles[o->nchildren]; 959 MTPObject *iter; 960 961 trace_usb_mtp_op_get_object_handles(s->dev.addr, o->handle, o->path); 962 963 QLIST_FOREACH(iter, &o->children, list) { 964 handles[i++] = iter->handle; 965 } 966 assert(i == o->nchildren); 967 usb_mtp_add_u32_array(d, o->nchildren, handles); 968 969 return d; 970 } 971 972 static MTPData *usb_mtp_get_object_info(MTPState *s, MTPControl *c, 973 MTPObject *o) 974 { 975 MTPData *d = usb_mtp_data_alloc(c); 976 977 trace_usb_mtp_op_get_object_info(s->dev.addr, o->handle, o->path); 978 979 usb_mtp_add_u32(d, QEMU_STORAGE_ID); 980 usb_mtp_add_u16(d, o->format); 981 usb_mtp_add_u16(d, 0); 982 983 if (o->stat.st_size > 0xFFFFFFFF) { 984 usb_mtp_add_u32(d, 0xFFFFFFFF); 985 } else { 986 usb_mtp_add_u32(d, o->stat.st_size); 987 } 988 989 usb_mtp_add_u16(d, 0); 990 usb_mtp_add_u32(d, 0); 991 usb_mtp_add_u32(d, 0); 992 usb_mtp_add_u32(d, 0); 993 usb_mtp_add_u32(d, 0); 994 usb_mtp_add_u32(d, 0); 995 usb_mtp_add_u32(d, 0); 996 997 if (o->parent) { 998 usb_mtp_add_u32(d, o->parent->handle); 999 } else { 1000 usb_mtp_add_u32(d, 0); 1001 } 1002 if (o->format == FMT_ASSOCIATION) { 1003 usb_mtp_add_u16(d, 0x0001); 1004 usb_mtp_add_u32(d, 0x00000001); 1005 usb_mtp_add_u32(d, 0); 1006 } else { 1007 usb_mtp_add_u16(d, 0); 1008 usb_mtp_add_u32(d, 0); 1009 usb_mtp_add_u32(d, 0); 1010 } 1011 1012 usb_mtp_add_str(d, o->name); 1013 usb_mtp_add_time(d, o->stat.st_ctime); 1014 usb_mtp_add_time(d, o->stat.st_mtime); 1015 usb_mtp_add_wstr(d, L""); 1016 1017 return d; 1018 } 1019 1020 static MTPData *usb_mtp_get_object(MTPState *s, MTPControl *c, 1021 MTPObject *o) 1022 { 1023 MTPData *d = usb_mtp_data_alloc(c); 1024 1025 trace_usb_mtp_op_get_object(s->dev.addr, o->handle, o->path); 1026 1027 d->fd = open(o->path, O_RDONLY | O_CLOEXEC | O_NOFOLLOW); 1028 if (d->fd == -1) { 1029 usb_mtp_data_free(d); 1030 return NULL; 1031 } 1032 d->length = o->stat.st_size; 1033 d->alloc = 512; 1034 d->data = g_malloc(d->alloc); 1035 return d; 1036 } 1037 1038 static MTPData *usb_mtp_get_partial_object(MTPState *s, MTPControl *c, 1039 MTPObject *o) 1040 { 1041 MTPData *d; 1042 off_t offset; 1043 1044 if (c->argc <= 2) { 1045 return NULL; 1046 } 1047 trace_usb_mtp_op_get_partial_object(s->dev.addr, o->handle, o->path, 1048 c->argv[1], c->argv[2]); 1049 1050 d = usb_mtp_data_alloc(c); 1051 d->fd = open(o->path, O_RDONLY | O_CLOEXEC | O_NOFOLLOW); 1052 if (d->fd == -1) { 1053 usb_mtp_data_free(d); 1054 return NULL; 1055 } 1056 1057 offset = c->argv[1]; 1058 if (offset > o->stat.st_size) { 1059 offset = o->stat.st_size; 1060 } 1061 if (lseek(d->fd, offset, SEEK_SET) < 0) { 1062 usb_mtp_data_free(d); 1063 return NULL; 1064 } 1065 1066 d->length = c->argv[2]; 1067 if (d->length > o->stat.st_size - offset) { 1068 d->length = o->stat.st_size - offset; 1069 } 1070 1071 return d; 1072 } 1073 1074 static MTPData *usb_mtp_get_object_props_supported(MTPState *s, MTPControl *c) 1075 { 1076 static const uint16_t props[] = { 1077 PROP_STORAGE_ID, 1078 PROP_OBJECT_FORMAT, 1079 PROP_OBJECT_COMPRESSED_SIZE, 1080 PROP_PARENT_OBJECT, 1081 PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER, 1082 PROP_NAME, 1083 }; 1084 MTPData *d = usb_mtp_data_alloc(c); 1085 usb_mtp_add_u16_array(d, ARRAY_SIZE(props), props); 1086 1087 return d; 1088 } 1089 1090 static MTPData *usb_mtp_get_object_prop_desc(MTPState *s, MTPControl *c) 1091 { 1092 MTPData *d = usb_mtp_data_alloc(c); 1093 switch (c->argv[0]) { 1094 case PROP_STORAGE_ID: 1095 usb_mtp_add_u16(d, PROP_STORAGE_ID); 1096 usb_mtp_add_u16(d, DATA_TYPE_UINT32); 1097 usb_mtp_add_u8(d, 0x00); 1098 usb_mtp_add_u32(d, 0x00000000); 1099 usb_mtp_add_u32(d, 0x00000000); 1100 usb_mtp_add_u8(d, 0x00); 1101 break; 1102 case PROP_OBJECT_FORMAT: 1103 usb_mtp_add_u16(d, PROP_OBJECT_FORMAT); 1104 usb_mtp_add_u16(d, DATA_TYPE_UINT16); 1105 usb_mtp_add_u8(d, 0x00); 1106 usb_mtp_add_u16(d, 0x0000); 1107 usb_mtp_add_u32(d, 0x00000000); 1108 usb_mtp_add_u8(d, 0x00); 1109 break; 1110 case PROP_OBJECT_COMPRESSED_SIZE: 1111 usb_mtp_add_u16(d, PROP_OBJECT_COMPRESSED_SIZE); 1112 usb_mtp_add_u16(d, DATA_TYPE_UINT64); 1113 usb_mtp_add_u8(d, 0x00); 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_PARENT_OBJECT: 1119 usb_mtp_add_u16(d, PROP_PARENT_OBJECT); 1120 usb_mtp_add_u16(d, DATA_TYPE_UINT32); 1121 usb_mtp_add_u8(d, 0x00); 1122 usb_mtp_add_u32(d, 0x00000000); 1123 usb_mtp_add_u32(d, 0x00000000); 1124 usb_mtp_add_u8(d, 0x00); 1125 break; 1126 case PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER: 1127 usb_mtp_add_u16(d, PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER); 1128 usb_mtp_add_u16(d, DATA_TYPE_UINT128); 1129 usb_mtp_add_u8(d, 0x00); 1130 usb_mtp_add_u64(d, 0x0000000000000000); 1131 usb_mtp_add_u64(d, 0x0000000000000000); 1132 usb_mtp_add_u32(d, 0x00000000); 1133 usb_mtp_add_u8(d, 0x00); 1134 break; 1135 case PROP_NAME: 1136 usb_mtp_add_u16(d, PROP_NAME); 1137 usb_mtp_add_u16(d, DATA_TYPE_STRING); 1138 usb_mtp_add_u8(d, 0x00); 1139 usb_mtp_add_u8(d, 0x00); 1140 usb_mtp_add_u32(d, 0x00000000); 1141 usb_mtp_add_u8(d, 0x00); 1142 break; 1143 default: 1144 usb_mtp_data_free(d); 1145 return NULL; 1146 } 1147 1148 return d; 1149 } 1150 1151 static MTPData *usb_mtp_get_object_prop_value(MTPState *s, MTPControl *c, 1152 MTPObject *o) 1153 { 1154 MTPData *d = usb_mtp_data_alloc(c); 1155 switch (c->argv[1]) { 1156 case PROP_STORAGE_ID: 1157 usb_mtp_add_u32(d, QEMU_STORAGE_ID); 1158 break; 1159 case PROP_OBJECT_FORMAT: 1160 usb_mtp_add_u16(d, o->format); 1161 break; 1162 case PROP_OBJECT_COMPRESSED_SIZE: 1163 usb_mtp_add_u64(d, o->stat.st_size); 1164 break; 1165 case PROP_PARENT_OBJECT: 1166 if (o->parent == NULL) { 1167 usb_mtp_add_u32(d, 0x00000000); 1168 } else { 1169 usb_mtp_add_u32(d, o->parent->handle); 1170 } 1171 break; 1172 case PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER: 1173 /* Should be persistent between sessions, 1174 * but using our objedt ID is "good enough" 1175 * for now */ 1176 usb_mtp_add_u64(d, 0x0000000000000000); 1177 usb_mtp_add_u64(d, o->handle); 1178 break; 1179 case PROP_NAME: 1180 usb_mtp_add_str(d, o->name); 1181 break; 1182 default: 1183 usb_mtp_data_free(d); 1184 return NULL; 1185 } 1186 1187 return d; 1188 } 1189 1190 /* Return correct return code for a delete event */ 1191 enum { 1192 ALL_DELETE, 1193 PARTIAL_DELETE, 1194 READ_ONLY, 1195 }; 1196 1197 /* Assumes that children, if any, have been already freed */ 1198 static void usb_mtp_object_free_one(MTPState *s, MTPObject *o) 1199 { 1200 #ifndef CONFIG_INOTIFY1 1201 assert(o->nchildren == 0); 1202 QTAILQ_REMOVE(&s->objects, o, next); 1203 g_free(o->name); 1204 g_free(o->path); 1205 g_free(o); 1206 #endif 1207 } 1208 1209 static int usb_mtp_deletefn(MTPState *s, MTPObject *o, uint32_t trans) 1210 { 1211 MTPObject *iter, *iter2; 1212 bool partial_delete = false; 1213 bool success = false; 1214 1215 /* 1216 * TODO: Add support for Protection Status 1217 */ 1218 1219 QLIST_FOREACH(iter, &o->children, list) { 1220 if (iter->format == FMT_ASSOCIATION) { 1221 QLIST_FOREACH(iter2, &iter->children, list) { 1222 usb_mtp_deletefn(s, iter2, trans); 1223 } 1224 } 1225 } 1226 1227 if (o->format == FMT_UNDEFINED_OBJECT) { 1228 if (remove(o->path)) { 1229 partial_delete = true; 1230 } else { 1231 usb_mtp_object_free_one(s, o); 1232 success = true; 1233 } 1234 } 1235 1236 if (o->format == FMT_ASSOCIATION) { 1237 if (rmdir(o->path)) { 1238 partial_delete = true; 1239 } else { 1240 usb_mtp_object_free_one(s, o); 1241 success = true; 1242 } 1243 } 1244 1245 if (success && partial_delete) { 1246 return PARTIAL_DELETE; 1247 } 1248 if (!success && partial_delete) { 1249 return READ_ONLY; 1250 } 1251 return ALL_DELETE; 1252 } 1253 1254 static void usb_mtp_object_delete(MTPState *s, uint32_t handle, 1255 uint32_t format_code, uint32_t trans) 1256 { 1257 MTPObject *o; 1258 int ret; 1259 1260 /* Return error if store is read-only */ 1261 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) { 1262 usb_mtp_queue_result(s, RES_STORE_READ_ONLY, 1263 trans, 0, 0, 0, 0); 1264 return; 1265 } 1266 1267 if (format_code != 0) { 1268 usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED, 1269 trans, 0, 0, 0, 0); 1270 return; 1271 } 1272 1273 if (handle == 0xFFFFFFF) { 1274 o = QTAILQ_FIRST(&s->objects); 1275 } else { 1276 o = usb_mtp_object_lookup(s, handle); 1277 } 1278 if (o == NULL) { 1279 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1280 trans, 0, 0, 0, 0); 1281 return; 1282 } 1283 1284 ret = usb_mtp_deletefn(s, o, trans); 1285 if (ret == PARTIAL_DELETE) { 1286 usb_mtp_queue_result(s, RES_PARTIAL_DELETE, 1287 trans, 0, 0, 0, 0); 1288 return; 1289 } else if (ret == READ_ONLY) { 1290 usb_mtp_queue_result(s, RES_STORE_READ_ONLY, trans, 1291 0, 0, 0, 0); 1292 return; 1293 } else { 1294 usb_mtp_queue_result(s, RES_OK, trans, 1295 0, 0, 0, 0); 1296 return; 1297 } 1298 } 1299 1300 static void usb_mtp_command(MTPState *s, MTPControl *c) 1301 { 1302 MTPData *data_in = NULL; 1303 MTPObject *o = NULL; 1304 uint32_t nres = 0, res0 = 0; 1305 1306 /* sanity checks */ 1307 if (c->code >= CMD_CLOSE_SESSION && s->session == 0) { 1308 usb_mtp_queue_result(s, RES_SESSION_NOT_OPEN, 1309 c->trans, 0, 0, 0, 0); 1310 return; 1311 } 1312 1313 /* process commands */ 1314 switch (c->code) { 1315 case CMD_GET_DEVICE_INFO: 1316 data_in = usb_mtp_get_device_info(s, c); 1317 break; 1318 case CMD_OPEN_SESSION: 1319 if (s->session) { 1320 usb_mtp_queue_result(s, RES_SESSION_ALREADY_OPEN, 1321 c->trans, 1, s->session, 0, 0); 1322 return; 1323 } 1324 if (c->argv[0] == 0) { 1325 usb_mtp_queue_result(s, RES_INVALID_PARAMETER, 1326 c->trans, 0, 0, 0, 0); 1327 return; 1328 } 1329 trace_usb_mtp_op_open_session(s->dev.addr); 1330 s->session = c->argv[0]; 1331 usb_mtp_object_alloc(s, s->next_handle++, NULL, s->root); 1332 #ifdef CONFIG_INOTIFY1 1333 if (usb_mtp_inotify_init(s)) { 1334 fprintf(stderr, "usb-mtp: file monitoring init failed\n"); 1335 } 1336 #endif 1337 break; 1338 case CMD_CLOSE_SESSION: 1339 trace_usb_mtp_op_close_session(s->dev.addr); 1340 s->session = 0; 1341 s->next_handle = 0; 1342 #ifdef CONFIG_INOTIFY1 1343 usb_mtp_inotify_cleanup(s); 1344 #endif 1345 usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects)); 1346 assert(QTAILQ_EMPTY(&s->objects)); 1347 break; 1348 case CMD_GET_STORAGE_IDS: 1349 data_in = usb_mtp_get_storage_ids(s, c); 1350 break; 1351 case CMD_GET_STORAGE_INFO: 1352 if (c->argv[0] != QEMU_STORAGE_ID && 1353 c->argv[0] != 0xffffffff) { 1354 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID, 1355 c->trans, 0, 0, 0, 0); 1356 return; 1357 } 1358 data_in = usb_mtp_get_storage_info(s, c); 1359 break; 1360 case CMD_GET_NUM_OBJECTS: 1361 case CMD_GET_OBJECT_HANDLES: 1362 if (c->argv[0] != QEMU_STORAGE_ID && 1363 c->argv[0] != 0xffffffff) { 1364 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID, 1365 c->trans, 0, 0, 0, 0); 1366 return; 1367 } 1368 if (c->argv[1] != 0x00000000) { 1369 usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED, 1370 c->trans, 0, 0, 0, 0); 1371 return; 1372 } 1373 if (c->argv[2] == 0x00000000 || 1374 c->argv[2] == 0xffffffff) { 1375 o = QTAILQ_FIRST(&s->objects); 1376 } else { 1377 o = usb_mtp_object_lookup(s, c->argv[2]); 1378 } 1379 if (o == NULL) { 1380 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1381 c->trans, 0, 0, 0, 0); 1382 return; 1383 } 1384 if (o->format != FMT_ASSOCIATION) { 1385 usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT, 1386 c->trans, 0, 0, 0, 0); 1387 return; 1388 } 1389 usb_mtp_object_readdir(s, o); 1390 if (c->code == CMD_GET_NUM_OBJECTS) { 1391 trace_usb_mtp_op_get_num_objects(s->dev.addr, o->handle, o->path); 1392 nres = 1; 1393 res0 = o->nchildren; 1394 } else { 1395 data_in = usb_mtp_get_object_handles(s, c, o); 1396 } 1397 break; 1398 case CMD_GET_OBJECT_INFO: 1399 o = usb_mtp_object_lookup(s, c->argv[0]); 1400 if (o == NULL) { 1401 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1402 c->trans, 0, 0, 0, 0); 1403 return; 1404 } 1405 data_in = usb_mtp_get_object_info(s, c, o); 1406 break; 1407 case CMD_GET_OBJECT: 1408 o = usb_mtp_object_lookup(s, c->argv[0]); 1409 if (o == NULL) { 1410 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1411 c->trans, 0, 0, 0, 0); 1412 return; 1413 } 1414 if (o->format == FMT_ASSOCIATION) { 1415 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1416 c->trans, 0, 0, 0, 0); 1417 return; 1418 } 1419 data_in = usb_mtp_get_object(s, c, o); 1420 if (data_in == NULL) { 1421 usb_mtp_queue_result(s, RES_GENERAL_ERROR, 1422 c->trans, 0, 0, 0, 0); 1423 return; 1424 } 1425 break; 1426 case CMD_DELETE_OBJECT: 1427 usb_mtp_object_delete(s, c->argv[0], c->argv[1], c->trans); 1428 return; 1429 case CMD_GET_PARTIAL_OBJECT: 1430 o = usb_mtp_object_lookup(s, c->argv[0]); 1431 if (o == NULL) { 1432 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1433 c->trans, 0, 0, 0, 0); 1434 return; 1435 } 1436 if (o->format == FMT_ASSOCIATION) { 1437 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1438 c->trans, 0, 0, 0, 0); 1439 return; 1440 } 1441 data_in = usb_mtp_get_partial_object(s, c, o); 1442 if (data_in == NULL) { 1443 usb_mtp_queue_result(s, RES_GENERAL_ERROR, 1444 c->trans, 0, 0, 0, 0); 1445 return; 1446 } 1447 nres = 1; 1448 res0 = data_in->length; 1449 break; 1450 case CMD_SEND_OBJECT_INFO: 1451 /* Return error if store is read-only */ 1452 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) { 1453 usb_mtp_queue_result(s, RES_STORE_READ_ONLY, 1454 c->trans, 0, 0, 0, 0); 1455 } else if (c->argv[0] && (c->argv[0] != QEMU_STORAGE_ID)) { 1456 /* First parameter points to storage id or is 0 */ 1457 usb_mtp_queue_result(s, RES_STORE_NOT_AVAILABLE, c->trans, 1458 0, 0, 0, 0); 1459 } else if (c->argv[1] && !c->argv[0]) { 1460 /* If second parameter is specified, first must also be specified */ 1461 usb_mtp_queue_result(s, RES_DESTINATION_UNSUPPORTED, c->trans, 1462 0, 0, 0, 0); 1463 } else { 1464 uint32_t handle = c->argv[1]; 1465 if (handle == 0xFFFFFFFF || handle == 0) { 1466 /* root object */ 1467 o = QTAILQ_FIRST(&s->objects); 1468 } else { 1469 o = usb_mtp_object_lookup(s, handle); 1470 } 1471 if (o == NULL) { 1472 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, c->trans, 1473 0, 0, 0, 0); 1474 } else if (o->format != FMT_ASSOCIATION) { 1475 usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT, c->trans, 1476 0, 0, 0, 0); 1477 } 1478 } 1479 if (o) { 1480 s->dataset.parent_handle = o->handle; 1481 } 1482 s->data_out = usb_mtp_data_alloc(c); 1483 return; 1484 case CMD_SEND_OBJECT: 1485 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) { 1486 usb_mtp_queue_result(s, RES_STORE_READ_ONLY, 1487 c->trans, 0, 0, 0, 0); 1488 return; 1489 } 1490 if (!s->write_pending) { 1491 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, 1492 c->trans, 0, 0, 0, 0); 1493 return; 1494 } 1495 s->data_out = usb_mtp_data_alloc(c); 1496 return; 1497 case CMD_GET_OBJECT_PROPS_SUPPORTED: 1498 if (c->argv[0] != FMT_UNDEFINED_OBJECT && 1499 c->argv[0] != FMT_ASSOCIATION) { 1500 usb_mtp_queue_result(s, RES_INVALID_OBJECT_FORMAT_CODE, 1501 c->trans, 0, 0, 0, 0); 1502 return; 1503 } 1504 data_in = usb_mtp_get_object_props_supported(s, c); 1505 break; 1506 case CMD_GET_OBJECT_PROP_DESC: 1507 if (c->argv[1] != FMT_UNDEFINED_OBJECT && 1508 c->argv[1] != FMT_ASSOCIATION) { 1509 usb_mtp_queue_result(s, RES_INVALID_OBJECT_FORMAT_CODE, 1510 c->trans, 0, 0, 0, 0); 1511 return; 1512 } 1513 data_in = usb_mtp_get_object_prop_desc(s, c); 1514 if (data_in == NULL) { 1515 usb_mtp_queue_result(s, RES_INVALID_OBJECT_PROP_CODE, 1516 c->trans, 0, 0, 0, 0); 1517 return; 1518 } 1519 break; 1520 case CMD_GET_OBJECT_PROP_VALUE: 1521 o = usb_mtp_object_lookup(s, c->argv[0]); 1522 if (o == NULL) { 1523 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1524 c->trans, 0, 0, 0, 0); 1525 return; 1526 } 1527 data_in = usb_mtp_get_object_prop_value(s, c, o); 1528 if (data_in == NULL) { 1529 usb_mtp_queue_result(s, RES_INVALID_OBJECT_PROP_CODE, 1530 c->trans, 0, 0, 0, 0); 1531 return; 1532 } 1533 break; 1534 default: 1535 trace_usb_mtp_op_unknown(s->dev.addr, c->code); 1536 usb_mtp_queue_result(s, RES_OPERATION_NOT_SUPPORTED, 1537 c->trans, 0, 0, 0, 0); 1538 return; 1539 } 1540 1541 /* return results on success */ 1542 if (data_in) { 1543 assert(s->data_in == NULL); 1544 s->data_in = data_in; 1545 } 1546 usb_mtp_queue_result(s, RES_OK, c->trans, nres, res0, 0, 0); 1547 } 1548 1549 /* ----------------------------------------------------------------------- */ 1550 1551 static void usb_mtp_handle_reset(USBDevice *dev) 1552 { 1553 MTPState *s = USB_MTP(dev); 1554 1555 trace_usb_mtp_reset(s->dev.addr); 1556 1557 #ifdef CONFIG_INOTIFY1 1558 usb_mtp_inotify_cleanup(s); 1559 #endif 1560 usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects)); 1561 s->session = 0; 1562 usb_mtp_data_free(s->data_in); 1563 s->data_in = NULL; 1564 usb_mtp_data_free(s->data_out); 1565 s->data_out = NULL; 1566 g_free(s->result); 1567 s->result = NULL; 1568 } 1569 1570 static void usb_mtp_handle_control(USBDevice *dev, USBPacket *p, 1571 int request, int value, int index, 1572 int length, uint8_t *data) 1573 { 1574 int ret; 1575 MTPState *s = USB_MTP(dev); 1576 uint16_t *event = (uint16_t *)data; 1577 1578 switch (request) { 1579 case ClassInterfaceOutRequest | 0x64: 1580 if (*event == EVT_CANCEL_TRANSACTION) { 1581 g_free(s->result); 1582 s->result = NULL; 1583 usb_mtp_data_free(s->data_in); 1584 s->data_in = NULL; 1585 if (s->write_pending) { 1586 g_free(s->dataset.filename); 1587 s->write_pending = false; 1588 s->dataset.size = 0; 1589 } 1590 usb_mtp_data_free(s->data_out); 1591 s->data_out = NULL; 1592 } else { 1593 p->status = USB_RET_STALL; 1594 } 1595 break; 1596 default: 1597 ret = usb_desc_handle_control(dev, p, request, 1598 value, index, length, data); 1599 if (ret >= 0) { 1600 return; 1601 } 1602 } 1603 1604 trace_usb_mtp_stall(dev->addr, "unknown control request"); 1605 } 1606 1607 static void usb_mtp_cancel_packet(USBDevice *dev, USBPacket *p) 1608 { 1609 /* we don't use async packets, so this should never be called */ 1610 fprintf(stderr, "%s\n", __func__); 1611 } 1612 1613 static char *utf16_to_str(uint8_t len, uint16_t *arr) 1614 { 1615 wchar_t *wstr = g_new0(wchar_t, len + 1); 1616 int count, dlen; 1617 char *dest; 1618 1619 for (count = 0; count < len; count++) { 1620 /* FIXME: not working for surrogate pairs */ 1621 wstr[count] = (wchar_t)arr[count]; 1622 } 1623 wstr[count] = 0; 1624 1625 dlen = wcstombs(NULL, wstr, 0) + 1; 1626 dest = g_malloc(dlen); 1627 wcstombs(dest, wstr, dlen); 1628 g_free(wstr); 1629 return dest; 1630 } 1631 1632 /* Wrapper around write, returns 0 on failure */ 1633 static uint64_t write_retry(int fd, void *buf, uint64_t size, off_t offset) 1634 { 1635 uint64_t ret = 0; 1636 1637 if (lseek(fd, offset, SEEK_SET) < 0) { 1638 goto done; 1639 } 1640 1641 ret = qemu_write_full(fd, buf, size); 1642 1643 done: 1644 return ret; 1645 } 1646 1647 static void usb_mtp_update_object(MTPObject *parent, char *name) 1648 { 1649 MTPObject *o = 1650 usb_mtp_object_lookup_name(parent, name, strlen(name)); 1651 1652 if (o) { 1653 lstat(o->path, &o->stat); 1654 } 1655 } 1656 1657 static void usb_mtp_write_data(MTPState *s) 1658 { 1659 MTPData *d = s->data_out; 1660 MTPObject *parent = 1661 usb_mtp_object_lookup(s, s->dataset.parent_handle); 1662 char *path = NULL; 1663 uint64_t rc; 1664 mode_t mask = 0644; 1665 1666 assert(d != NULL); 1667 1668 switch (d->write_status) { 1669 case WRITE_START: 1670 if (!parent || !s->write_pending) { 1671 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, d->trans, 1672 0, 0, 0, 0); 1673 return; 1674 } 1675 1676 if (s->dataset.filename) { 1677 path = g_strdup_printf("%s/%s", parent->path, s->dataset.filename); 1678 if (s->dataset.format == FMT_ASSOCIATION) { 1679 d->fd = mkdir(path, mask); 1680 goto free; 1681 } 1682 d->fd = open(path, O_CREAT | O_WRONLY | 1683 O_CLOEXEC | O_NOFOLLOW, mask); 1684 if (d->fd == -1) { 1685 usb_mtp_queue_result(s, RES_STORE_FULL, d->trans, 1686 0, 0, 0, 0); 1687 goto done; 1688 } 1689 1690 /* Return success if initiator sent 0 sized data */ 1691 if (!s->dataset.size) { 1692 goto success; 1693 } 1694 if (d->length != MTP_WRITE_BUF_SZ && !d->pending) { 1695 d->write_status = WRITE_END; 1696 } 1697 } 1698 /* fall through */ 1699 case WRITE_CONTINUE: 1700 case WRITE_END: 1701 rc = write_retry(d->fd, d->data, d->data_offset, 1702 d->offset - d->data_offset); 1703 if (rc != d->data_offset) { 1704 usb_mtp_queue_result(s, RES_STORE_FULL, d->trans, 1705 0, 0, 0, 0); 1706 goto done; 1707 } 1708 if (d->write_status != WRITE_END) { 1709 return; 1710 } else { 1711 /* Only for < 4G file sizes */ 1712 if (s->dataset.size != 0xFFFFFFFF && d->offset != s->dataset.size) { 1713 usb_mtp_queue_result(s, RES_INCOMPLETE_TRANSFER, d->trans, 1714 0, 0, 0, 0); 1715 goto done; 1716 } 1717 usb_mtp_update_object(parent, s->dataset.filename); 1718 } 1719 } 1720 1721 success: 1722 usb_mtp_queue_result(s, RES_OK, d->trans, 1723 0, 0, 0, 0); 1724 1725 done: 1726 /* 1727 * The write dataset is kept around and freed only 1728 * on success or if another write request comes in 1729 */ 1730 if (d->fd != -1) { 1731 close(d->fd); 1732 } 1733 free: 1734 g_free(s->dataset.filename); 1735 s->dataset.size = 0; 1736 g_free(path); 1737 s->write_pending = false; 1738 } 1739 1740 static void usb_mtp_write_metadata(MTPState *s, uint64_t dlen) 1741 { 1742 MTPData *d = s->data_out; 1743 ObjectInfo *dataset = (ObjectInfo *)d->data; 1744 char *filename; 1745 MTPObject *o; 1746 MTPObject *p = usb_mtp_object_lookup(s, s->dataset.parent_handle); 1747 uint32_t next_handle = s->next_handle; 1748 1749 assert(!s->write_pending); 1750 assert(p != NULL); 1751 1752 filename = utf16_to_str(MIN(dataset->length, 1753 dlen - offsetof(ObjectInfo, filename)), 1754 dataset->filename); 1755 1756 if (strchr(filename, '/')) { 1757 usb_mtp_queue_result(s, RES_PARAMETER_NOT_SUPPORTED, d->trans, 1758 0, 0, 0, 0); 1759 g_free(filename); 1760 return; 1761 } 1762 1763 o = usb_mtp_object_lookup_name(p, filename, dataset->length); 1764 if (o != NULL) { 1765 next_handle = o->handle; 1766 } 1767 1768 s->dataset.filename = filename; 1769 s->dataset.format = dataset->format; 1770 s->dataset.size = dataset->size; 1771 s->write_pending = true; 1772 1773 if (s->dataset.format == FMT_ASSOCIATION) { 1774 usb_mtp_write_data(s); 1775 /* next_handle will be allocated to the newly created dir */ 1776 if (d->fd == -1) { 1777 usb_mtp_queue_result(s, RES_STORE_FULL, d->trans, 1778 0, 0, 0, 0); 1779 return; 1780 } 1781 d->fd = -1; 1782 } 1783 1784 usb_mtp_queue_result(s, RES_OK, d->trans, 3, QEMU_STORAGE_ID, 1785 s->dataset.parent_handle, next_handle); 1786 } 1787 1788 static void usb_mtp_get_data(MTPState *s, mtp_container *container, 1789 USBPacket *p) 1790 { 1791 MTPData *d = s->data_out; 1792 uint64_t dlen; 1793 uint32_t data_len = p->iov.size; 1794 uint64_t total_len; 1795 1796 if (!d) { 1797 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, 0, 1798 0, 0, 0, 0); 1799 return; 1800 } 1801 if (d->first) { 1802 /* Total length of incoming data */ 1803 total_len = cpu_to_le32(container->length) - sizeof(mtp_container); 1804 /* Length of data in this packet */ 1805 data_len -= sizeof(mtp_container); 1806 if (total_len < MTP_WRITE_BUF_SZ) { 1807 usb_mtp_realloc(d, total_len); 1808 d->length += total_len; 1809 } else { 1810 usb_mtp_realloc(d, MTP_WRITE_BUF_SZ - sizeof(mtp_container)); 1811 d->length += MTP_WRITE_BUF_SZ - sizeof(mtp_container); 1812 } 1813 d->offset = 0; 1814 d->first = false; 1815 d->pending = false; 1816 d->data_offset = 0; 1817 d->write_status = WRITE_START; 1818 } 1819 1820 if (d->pending) { 1821 memset(d->data, 0, d->length); 1822 if (d->length != MTP_WRITE_BUF_SZ) { 1823 usb_mtp_realloc(d, MTP_WRITE_BUF_SZ - d->length); 1824 d->length += (MTP_WRITE_BUF_SZ - d->length); 1825 } 1826 d->pending = false; 1827 d->write_status = WRITE_CONTINUE; 1828 d->data_offset = 0; 1829 } 1830 1831 if (d->length - d->data_offset > data_len) { 1832 dlen = data_len; 1833 } else { 1834 dlen = d->length - d->data_offset; 1835 } 1836 1837 switch (d->code) { 1838 case CMD_SEND_OBJECT_INFO: 1839 usb_packet_copy(p, d->data + d->data_offset, dlen); 1840 d->offset += dlen; 1841 d->data_offset += dlen; 1842 if (d->data_offset == d->length) { 1843 /* The operation might have already failed */ 1844 if (!s->result) { 1845 usb_mtp_write_metadata(s, dlen); 1846 } 1847 usb_mtp_data_free(s->data_out); 1848 s->data_out = NULL; 1849 return; 1850 } 1851 break; 1852 case CMD_SEND_OBJECT: 1853 usb_packet_copy(p, d->data + d->data_offset, dlen); 1854 d->offset += dlen; 1855 d->data_offset += dlen; 1856 if ((p->iov.size % 64) || !p->iov.size) { 1857 assert((s->dataset.size == 0xFFFFFFFF) || 1858 (s->dataset.size == d->offset)); 1859 1860 if (d->length == MTP_WRITE_BUF_SZ) { 1861 d->write_status = WRITE_END; 1862 } else { 1863 d->write_status = WRITE_START; 1864 } 1865 usb_mtp_write_data(s); 1866 usb_mtp_data_free(s->data_out); 1867 s->data_out = NULL; 1868 return; 1869 } 1870 if (d->data_offset == d->length) { 1871 d->pending = true; 1872 usb_mtp_write_data(s); 1873 } 1874 break; 1875 default: 1876 p->status = USB_RET_STALL; 1877 return; 1878 } 1879 } 1880 1881 static void usb_mtp_handle_data(USBDevice *dev, USBPacket *p) 1882 { 1883 MTPState *s = USB_MTP(dev); 1884 MTPControl cmd; 1885 mtp_container container; 1886 uint32_t params[5]; 1887 uint16_t container_type; 1888 int i, rc; 1889 1890 switch (p->ep->nr) { 1891 case EP_DATA_IN: 1892 if (s->data_out != NULL) { 1893 /* guest bug */ 1894 trace_usb_mtp_stall(s->dev.addr, "awaiting data-out"); 1895 p->status = USB_RET_STALL; 1896 return; 1897 } 1898 if (p->iov.size < sizeof(container)) { 1899 trace_usb_mtp_stall(s->dev.addr, "packet too small"); 1900 p->status = USB_RET_STALL; 1901 return; 1902 } 1903 if (s->data_in != NULL) { 1904 MTPData *d = s->data_in; 1905 uint64_t dlen = d->length - d->offset; 1906 if (d->first) { 1907 trace_usb_mtp_data_in(s->dev.addr, d->trans, d->length); 1908 if (d->length + sizeof(container) > 0xFFFFFFFF) { 1909 container.length = cpu_to_le32(0xFFFFFFFF); 1910 } else { 1911 container.length = 1912 cpu_to_le32(d->length + sizeof(container)); 1913 } 1914 container.type = cpu_to_le16(TYPE_DATA); 1915 container.code = cpu_to_le16(d->code); 1916 container.trans = cpu_to_le32(d->trans); 1917 usb_packet_copy(p, &container, sizeof(container)); 1918 d->first = false; 1919 if (dlen > p->iov.size - sizeof(container)) { 1920 dlen = p->iov.size - sizeof(container); 1921 } 1922 } else { 1923 if (dlen > p->iov.size) { 1924 dlen = p->iov.size; 1925 } 1926 } 1927 if (d->fd == -1) { 1928 usb_packet_copy(p, d->data + d->offset, dlen); 1929 } else { 1930 if (d->alloc < p->iov.size) { 1931 d->alloc = p->iov.size; 1932 d->data = g_realloc(d->data, d->alloc); 1933 } 1934 rc = read(d->fd, d->data, dlen); 1935 if (rc != dlen) { 1936 memset(d->data, 0, dlen); 1937 s->result->code = RES_INCOMPLETE_TRANSFER; 1938 } 1939 usb_packet_copy(p, d->data, dlen); 1940 } 1941 d->offset += dlen; 1942 if (d->offset == d->length) { 1943 usb_mtp_data_free(s->data_in); 1944 s->data_in = NULL; 1945 } 1946 } else if (s->result != NULL) { 1947 MTPControl *r = s->result; 1948 int length = sizeof(container) + r->argc * sizeof(uint32_t); 1949 if (r->code == RES_OK) { 1950 trace_usb_mtp_success(s->dev.addr, r->trans, 1951 (r->argc > 0) ? r->argv[0] : 0, 1952 (r->argc > 1) ? r->argv[1] : 0); 1953 } else { 1954 trace_usb_mtp_error(s->dev.addr, r->code, r->trans, 1955 (r->argc > 0) ? r->argv[0] : 0, 1956 (r->argc > 1) ? r->argv[1] : 0); 1957 } 1958 container.length = cpu_to_le32(length); 1959 container.type = cpu_to_le16(TYPE_RESPONSE); 1960 container.code = cpu_to_le16(r->code); 1961 container.trans = cpu_to_le32(r->trans); 1962 for (i = 0; i < r->argc; i++) { 1963 params[i] = cpu_to_le32(r->argv[i]); 1964 } 1965 usb_packet_copy(p, &container, sizeof(container)); 1966 usb_packet_copy(p, ¶ms, length - sizeof(container)); 1967 g_free(s->result); 1968 s->result = NULL; 1969 } 1970 break; 1971 case EP_DATA_OUT: 1972 if (p->iov.size < sizeof(container)) { 1973 trace_usb_mtp_stall(s->dev.addr, "packet too small"); 1974 p->status = USB_RET_STALL; 1975 return; 1976 } 1977 if ((s->data_out != NULL) && !s->data_out->first) { 1978 container_type = TYPE_DATA; 1979 } else { 1980 usb_packet_copy(p, &container, sizeof(container)); 1981 container_type = le16_to_cpu(container.type); 1982 } 1983 switch (container_type) { 1984 case TYPE_COMMAND: 1985 if (s->data_in || s->data_out || s->result) { 1986 trace_usb_mtp_stall(s->dev.addr, "transaction inflight"); 1987 p->status = USB_RET_STALL; 1988 return; 1989 } 1990 cmd.code = le16_to_cpu(container.code); 1991 cmd.argc = (le32_to_cpu(container.length) - sizeof(container)) 1992 / sizeof(uint32_t); 1993 cmd.trans = le32_to_cpu(container.trans); 1994 if (cmd.argc > ARRAY_SIZE(cmd.argv)) { 1995 cmd.argc = ARRAY_SIZE(cmd.argv); 1996 } 1997 if (p->iov.size < sizeof(container) + cmd.argc * sizeof(uint32_t)) { 1998 trace_usb_mtp_stall(s->dev.addr, "packet too small"); 1999 p->status = USB_RET_STALL; 2000 return; 2001 } 2002 usb_packet_copy(p, ¶ms, cmd.argc * sizeof(uint32_t)); 2003 for (i = 0; i < cmd.argc; i++) { 2004 cmd.argv[i] = le32_to_cpu(params[i]); 2005 } 2006 trace_usb_mtp_command(s->dev.addr, cmd.code, cmd.trans, 2007 (cmd.argc > 0) ? cmd.argv[0] : 0, 2008 (cmd.argc > 1) ? cmd.argv[1] : 0, 2009 (cmd.argc > 2) ? cmd.argv[2] : 0, 2010 (cmd.argc > 3) ? cmd.argv[3] : 0, 2011 (cmd.argc > 4) ? cmd.argv[4] : 0); 2012 usb_mtp_command(s, &cmd); 2013 break; 2014 case TYPE_DATA: 2015 /* One of the previous transfers has already errored but the 2016 * responder is still sending data associated with it 2017 */ 2018 if (s->result != NULL) { 2019 return; 2020 } 2021 usb_mtp_get_data(s, &container, p); 2022 break; 2023 default: 2024 /* not needed as long as the mtp device is read-only */ 2025 p->status = USB_RET_STALL; 2026 return; 2027 } 2028 break; 2029 case EP_EVENT: 2030 #ifdef CONFIG_INOTIFY1 2031 if (!QTAILQ_EMPTY(&s->events)) { 2032 struct MTPMonEntry *e = QTAILQ_LAST(&s->events); 2033 uint32_t handle; 2034 int len = sizeof(container) + sizeof(uint32_t); 2035 2036 if (p->iov.size < len) { 2037 trace_usb_mtp_stall(s->dev.addr, 2038 "packet too small to send event"); 2039 p->status = USB_RET_STALL; 2040 return; 2041 } 2042 2043 QTAILQ_REMOVE(&s->events, e, next); 2044 container.length = cpu_to_le32(len); 2045 container.type = cpu_to_le32(TYPE_EVENT); 2046 container.code = cpu_to_le16(e->event); 2047 container.trans = 0; /* no trans specific events */ 2048 handle = cpu_to_le32(e->handle); 2049 usb_packet_copy(p, &container, sizeof(container)); 2050 usb_packet_copy(p, &handle, sizeof(uint32_t)); 2051 g_free(e); 2052 return; 2053 } 2054 #endif 2055 p->status = USB_RET_NAK; 2056 return; 2057 default: 2058 trace_usb_mtp_stall(s->dev.addr, "invalid endpoint"); 2059 p->status = USB_RET_STALL; 2060 return; 2061 } 2062 2063 if (p->actual_length == 0) { 2064 trace_usb_mtp_nak(s->dev.addr, p->ep->nr); 2065 p->status = USB_RET_NAK; 2066 return; 2067 } else { 2068 trace_usb_mtp_xfer(s->dev.addr, p->ep->nr, p->actual_length, 2069 p->iov.size); 2070 return; 2071 } 2072 } 2073 2074 static void usb_mtp_realize(USBDevice *dev, Error **errp) 2075 { 2076 MTPState *s = USB_MTP(dev); 2077 2078 usb_desc_create_serial(dev); 2079 usb_desc_init(dev); 2080 QTAILQ_INIT(&s->objects); 2081 if (s->desc == NULL) { 2082 if (s->root == NULL) { 2083 error_setg(errp, "usb-mtp: rootdir property must be configured"); 2084 return; 2085 } 2086 s->desc = strrchr(s->root, '/'); 2087 if (s->desc && s->desc[0]) { 2088 s->desc = g_strdup(s->desc + 1); 2089 } else { 2090 s->desc = g_strdup("none"); 2091 } 2092 } 2093 /* Mark store as RW */ 2094 if (!s->readonly) { 2095 s->flags |= (1 << MTP_FLAG_WRITABLE); 2096 } 2097 2098 } 2099 2100 static const VMStateDescription vmstate_usb_mtp = { 2101 .name = "usb-mtp", 2102 .unmigratable = 1, 2103 .version_id = 1, 2104 .minimum_version_id = 1, 2105 .fields = (VMStateField[]) { 2106 VMSTATE_USB_DEVICE(dev, MTPState), 2107 VMSTATE_END_OF_LIST() 2108 } 2109 }; 2110 2111 static Property mtp_properties[] = { 2112 DEFINE_PROP_STRING("rootdir", MTPState, root), 2113 DEFINE_PROP_STRING("desc", MTPState, desc), 2114 DEFINE_PROP_BOOL("readonly", MTPState, readonly, true), 2115 DEFINE_PROP_END_OF_LIST(), 2116 }; 2117 2118 static void usb_mtp_class_initfn(ObjectClass *klass, void *data) 2119 { 2120 DeviceClass *dc = DEVICE_CLASS(klass); 2121 USBDeviceClass *uc = USB_DEVICE_CLASS(klass); 2122 2123 uc->realize = usb_mtp_realize; 2124 uc->product_desc = "QEMU USB MTP"; 2125 uc->usb_desc = &desc; 2126 uc->cancel_packet = usb_mtp_cancel_packet; 2127 uc->handle_attach = usb_desc_attach; 2128 uc->handle_reset = usb_mtp_handle_reset; 2129 uc->handle_control = usb_mtp_handle_control; 2130 uc->handle_data = usb_mtp_handle_data; 2131 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 2132 dc->desc = "USB Media Transfer Protocol device"; 2133 dc->fw_name = "mtp"; 2134 dc->vmsd = &vmstate_usb_mtp; 2135 dc->props = mtp_properties; 2136 } 2137 2138 static TypeInfo mtp_info = { 2139 .name = TYPE_USB_MTP, 2140 .parent = TYPE_USB_DEVICE, 2141 .instance_size = sizeof(MTPState), 2142 .class_init = usb_mtp_class_initfn, 2143 }; 2144 2145 static void usb_mtp_register_types(void) 2146 { 2147 type_register_static(&mtp_info); 2148 } 2149 2150 type_init(usb_mtp_register_types) 2151