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 "qemu/error-report.h" 15 #include <wchar.h> 16 #include <dirent.h> 17 18 #include <sys/statvfs.h> 19 20 21 #include "qemu-common.h" 22 #include "qemu/iov.h" 23 #include "qemu/filemonitor.h" 24 #include "trace.h" 25 #include "hw/usb.h" 26 #include "desc.h" 27 #include "qemu/units.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 /* MTP write stage, for internal use only */ 39 enum mtp_write_status { 40 WRITE_START = 1, 41 WRITE_CONTINUE = 2, 42 WRITE_END = 3, 43 }; 44 45 enum mtp_code { 46 /* command codes */ 47 CMD_GET_DEVICE_INFO = 0x1001, 48 CMD_OPEN_SESSION = 0x1002, 49 CMD_CLOSE_SESSION = 0x1003, 50 CMD_GET_STORAGE_IDS = 0x1004, 51 CMD_GET_STORAGE_INFO = 0x1005, 52 CMD_GET_NUM_OBJECTS = 0x1006, 53 CMD_GET_OBJECT_HANDLES = 0x1007, 54 CMD_GET_OBJECT_INFO = 0x1008, 55 CMD_GET_OBJECT = 0x1009, 56 CMD_DELETE_OBJECT = 0x100b, 57 CMD_SEND_OBJECT_INFO = 0x100c, 58 CMD_SEND_OBJECT = 0x100d, 59 CMD_GET_PARTIAL_OBJECT = 0x101b, 60 CMD_GET_OBJECT_PROPS_SUPPORTED = 0x9801, 61 CMD_GET_OBJECT_PROP_DESC = 0x9802, 62 CMD_GET_OBJECT_PROP_VALUE = 0x9803, 63 64 /* response codes */ 65 RES_OK = 0x2001, 66 RES_GENERAL_ERROR = 0x2002, 67 RES_SESSION_NOT_OPEN = 0x2003, 68 RES_INVALID_TRANSACTION_ID = 0x2004, 69 RES_OPERATION_NOT_SUPPORTED = 0x2005, 70 RES_PARAMETER_NOT_SUPPORTED = 0x2006, 71 RES_INCOMPLETE_TRANSFER = 0x2007, 72 RES_INVALID_STORAGE_ID = 0x2008, 73 RES_INVALID_OBJECT_HANDLE = 0x2009, 74 RES_INVALID_OBJECT_FORMAT_CODE = 0x200b, 75 RES_STORE_FULL = 0x200c, 76 RES_STORE_READ_ONLY = 0x200e, 77 RES_PARTIAL_DELETE = 0x2012, 78 RES_STORE_NOT_AVAILABLE = 0x2013, 79 RES_SPEC_BY_FORMAT_UNSUPPORTED = 0x2014, 80 RES_INVALID_OBJECTINFO = 0x2015, 81 RES_DESTINATION_UNSUPPORTED = 0x2020, 82 RES_INVALID_PARENT_OBJECT = 0x201a, 83 RES_INVALID_PARAMETER = 0x201d, 84 RES_SESSION_ALREADY_OPEN = 0x201e, 85 RES_INVALID_OBJECT_PROP_CODE = 0xA801, 86 87 /* format codes */ 88 FMT_UNDEFINED_OBJECT = 0x3000, 89 FMT_ASSOCIATION = 0x3001, 90 91 /* event codes */ 92 EVT_CANCEL_TRANSACTION = 0x4001, 93 EVT_OBJ_ADDED = 0x4002, 94 EVT_OBJ_REMOVED = 0x4003, 95 EVT_OBJ_INFO_CHANGED = 0x4007, 96 97 /* object properties */ 98 PROP_STORAGE_ID = 0xDC01, 99 PROP_OBJECT_FORMAT = 0xDC02, 100 PROP_OBJECT_COMPRESSED_SIZE = 0xDC04, 101 PROP_PARENT_OBJECT = 0xDC0B, 102 PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER = 0xDC41, 103 PROP_NAME = 0xDC44, 104 }; 105 106 enum mtp_data_type { 107 DATA_TYPE_UINT16 = 0x0004, 108 DATA_TYPE_UINT32 = 0x0006, 109 DATA_TYPE_UINT64 = 0x0008, 110 DATA_TYPE_UINT128 = 0x000a, 111 DATA_TYPE_STRING = 0xffff, 112 }; 113 114 typedef struct { 115 uint32_t length; 116 uint16_t type; 117 uint16_t code; 118 uint32_t trans; 119 } QEMU_PACKED mtp_container; 120 121 /* ----------------------------------------------------------------------- */ 122 123 typedef struct MTPState MTPState; 124 typedef struct MTPControl MTPControl; 125 typedef struct MTPData MTPData; 126 typedef struct MTPObject MTPObject; 127 128 enum { 129 EP_DATA_IN = 1, 130 EP_DATA_OUT, 131 EP_EVENT, 132 }; 133 134 typedef struct MTPMonEntry MTPMonEntry; 135 136 struct MTPMonEntry { 137 uint32_t event; 138 uint32_t handle; 139 140 QTAILQ_ENTRY(MTPMonEntry) next; 141 }; 142 143 struct MTPControl { 144 uint16_t code; 145 uint32_t trans; 146 int argc; 147 uint32_t argv[5]; 148 }; 149 150 struct MTPData { 151 uint16_t code; 152 uint32_t trans; 153 uint64_t offset; 154 uint64_t length; 155 uint64_t alloc; 156 uint8_t *data; 157 bool first; 158 /* Used for >4G file sizes */ 159 bool pending; 160 int fd; 161 uint8_t write_status; 162 /* Internal pointer per every MTP_WRITE_BUF_SZ */ 163 uint64_t data_offset; 164 }; 165 166 struct MTPObject { 167 uint32_t handle; 168 uint16_t format; 169 char *name; 170 char *path; 171 struct stat stat; 172 /* file monitor watch id */ 173 int watchid; 174 MTPObject *parent; 175 uint32_t nchildren; 176 QLIST_HEAD(, MTPObject) children; 177 QLIST_ENTRY(MTPObject) list; 178 bool have_children; 179 QTAILQ_ENTRY(MTPObject) next; 180 }; 181 182 struct MTPState { 183 USBDevice dev; 184 char *root; 185 char *desc; 186 uint32_t flags; 187 188 MTPData *data_in; 189 MTPData *data_out; 190 MTPControl *result; 191 uint32_t session; 192 uint32_t next_handle; 193 bool readonly; 194 195 QTAILQ_HEAD(, MTPObject) objects; 196 QFileMonitor *file_monitor; 197 QTAILQ_HEAD(, MTPMonEntry) events; 198 /* Responder is expecting a write operation */ 199 bool write_pending; 200 struct { 201 uint32_t parent_handle; 202 uint16_t format; 203 uint32_t size; 204 char *filename; 205 } dataset; 206 }; 207 208 /* 209 * ObjectInfo dataset received from initiator 210 * Fields we don't care about are ignored 211 */ 212 typedef struct { 213 uint32_t storage_id; /*unused*/ 214 uint16_t format; 215 uint16_t protection_status; /*unused*/ 216 uint32_t size; 217 uint16_t thumb_format; /*unused*/ 218 uint32_t thumb_comp_sz; /*unused*/ 219 uint32_t thumb_pix_width; /*unused*/ 220 uint32_t thumb_pix_height; /*unused*/ 221 uint32_t image_pix_width; /*unused*/ 222 uint32_t image_pix_height; /*unused*/ 223 uint32_t image_bit_depth; /*unused*/ 224 uint32_t parent; /*unused*/ 225 uint16_t assoc_type; 226 uint32_t assoc_desc; 227 uint32_t seq_no; /*unused*/ 228 uint8_t length; /*part of filename field*/ 229 uint16_t filename[0]; 230 char date_created[0]; /*unused*/ 231 char date_modified[0]; /*unused*/ 232 char keywords[0]; /*unused*/ 233 /* string and other data follows */ 234 } QEMU_PACKED ObjectInfo; 235 236 #define TYPE_USB_MTP "usb-mtp" 237 #define USB_MTP(obj) OBJECT_CHECK(MTPState, (obj), TYPE_USB_MTP) 238 239 #define QEMU_STORAGE_ID 0x00010001 240 241 #define MTP_FLAG_WRITABLE 0 242 243 #define FLAG_SET(_mtp, _flag) ((_mtp)->flags & (1 << (_flag))) 244 245 /* ----------------------------------------------------------------------- */ 246 247 #define MTP_MANUFACTURER "QEMU" 248 #define MTP_PRODUCT "QEMU filesharing" 249 #define MTP_WRITE_BUF_SZ (512 * KiB) 250 251 enum { 252 STR_MANUFACTURER = 1, 253 STR_PRODUCT, 254 STR_SERIALNUMBER, 255 STR_MTP, 256 STR_CONFIG_FULL, 257 STR_CONFIG_HIGH, 258 STR_CONFIG_SUPER, 259 }; 260 261 static const USBDescStrings desc_strings = { 262 [STR_MANUFACTURER] = MTP_MANUFACTURER, 263 [STR_PRODUCT] = MTP_PRODUCT, 264 [STR_SERIALNUMBER] = "34617", 265 [STR_MTP] = "MTP", 266 [STR_CONFIG_FULL] = "Full speed config (usb 1.1)", 267 [STR_CONFIG_HIGH] = "High speed config (usb 2.0)", 268 [STR_CONFIG_SUPER] = "Super speed config (usb 3.0)", 269 }; 270 271 static const USBDescIface desc_iface_full = { 272 .bInterfaceNumber = 0, 273 .bNumEndpoints = 3, 274 .bInterfaceClass = USB_CLASS_STILL_IMAGE, 275 .bInterfaceSubClass = 0x01, 276 .bInterfaceProtocol = 0x01, 277 .iInterface = STR_MTP, 278 .eps = (USBDescEndpoint[]) { 279 { 280 .bEndpointAddress = USB_DIR_IN | EP_DATA_IN, 281 .bmAttributes = USB_ENDPOINT_XFER_BULK, 282 .wMaxPacketSize = 64, 283 },{ 284 .bEndpointAddress = USB_DIR_OUT | EP_DATA_OUT, 285 .bmAttributes = USB_ENDPOINT_XFER_BULK, 286 .wMaxPacketSize = 64, 287 },{ 288 .bEndpointAddress = USB_DIR_IN | EP_EVENT, 289 .bmAttributes = USB_ENDPOINT_XFER_INT, 290 .wMaxPacketSize = 64, 291 .bInterval = 0x0a, 292 }, 293 } 294 }; 295 296 static const USBDescDevice desc_device_full = { 297 .bcdUSB = 0x0200, 298 .bMaxPacketSize0 = 8, 299 .bNumConfigurations = 1, 300 .confs = (USBDescConfig[]) { 301 { 302 .bNumInterfaces = 1, 303 .bConfigurationValue = 1, 304 .iConfiguration = STR_CONFIG_FULL, 305 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP, 306 .bMaxPower = 2, 307 .nif = 1, 308 .ifs = &desc_iface_full, 309 }, 310 }, 311 }; 312 313 static const USBDescIface desc_iface_high = { 314 .bInterfaceNumber = 0, 315 .bNumEndpoints = 3, 316 .bInterfaceClass = USB_CLASS_STILL_IMAGE, 317 .bInterfaceSubClass = 0x01, 318 .bInterfaceProtocol = 0x01, 319 .iInterface = STR_MTP, 320 .eps = (USBDescEndpoint[]) { 321 { 322 .bEndpointAddress = USB_DIR_IN | EP_DATA_IN, 323 .bmAttributes = USB_ENDPOINT_XFER_BULK, 324 .wMaxPacketSize = 512, 325 },{ 326 .bEndpointAddress = USB_DIR_OUT | EP_DATA_OUT, 327 .bmAttributes = USB_ENDPOINT_XFER_BULK, 328 .wMaxPacketSize = 512, 329 },{ 330 .bEndpointAddress = USB_DIR_IN | EP_EVENT, 331 .bmAttributes = USB_ENDPOINT_XFER_INT, 332 .wMaxPacketSize = 64, 333 .bInterval = 0x0a, 334 }, 335 } 336 }; 337 338 static const USBDescDevice desc_device_high = { 339 .bcdUSB = 0x0200, 340 .bMaxPacketSize0 = 64, 341 .bNumConfigurations = 1, 342 .confs = (USBDescConfig[]) { 343 { 344 .bNumInterfaces = 1, 345 .bConfigurationValue = 1, 346 .iConfiguration = STR_CONFIG_HIGH, 347 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP, 348 .bMaxPower = 2, 349 .nif = 1, 350 .ifs = &desc_iface_high, 351 }, 352 }, 353 }; 354 355 static const USBDescMSOS desc_msos = { 356 .CompatibleID = "MTP", 357 .SelectiveSuspendEnabled = true, 358 }; 359 360 static const USBDesc desc = { 361 .id = { 362 .idVendor = 0x46f4, /* CRC16() of "QEMU" */ 363 .idProduct = 0x0004, 364 .bcdDevice = 0, 365 .iManufacturer = STR_MANUFACTURER, 366 .iProduct = STR_PRODUCT, 367 .iSerialNumber = STR_SERIALNUMBER, 368 }, 369 .full = &desc_device_full, 370 .high = &desc_device_high, 371 .str = desc_strings, 372 .msos = &desc_msos, 373 }; 374 375 /* ----------------------------------------------------------------------- */ 376 377 static MTPObject *usb_mtp_object_alloc(MTPState *s, uint32_t handle, 378 MTPObject *parent, const char *name) 379 { 380 MTPObject *o = g_new0(MTPObject, 1); 381 382 if (name[0] == '.') { 383 goto ignore; 384 } 385 386 o->watchid = -1; 387 o->handle = handle; 388 o->parent = parent; 389 o->name = g_strdup(name); 390 if (parent == NULL) { 391 o->path = g_strdup(name); 392 } else { 393 o->path = g_strdup_printf("%s/%s", parent->path, name); 394 } 395 396 if (lstat(o->path, &o->stat) != 0) { 397 goto ignore; 398 } 399 if (S_ISREG(o->stat.st_mode)) { 400 o->format = FMT_UNDEFINED_OBJECT; 401 } else if (S_ISDIR(o->stat.st_mode)) { 402 o->format = FMT_ASSOCIATION; 403 } else { 404 goto ignore; 405 } 406 407 if (access(o->path, R_OK) != 0) { 408 goto ignore; 409 } 410 411 trace_usb_mtp_object_alloc(s->dev.addr, o->handle, o->path); 412 413 QTAILQ_INSERT_TAIL(&s->objects, o, next); 414 return o; 415 416 ignore: 417 g_free(o->name); 418 g_free(o->path); 419 g_free(o); 420 return NULL; 421 } 422 423 static void usb_mtp_object_free(MTPState *s, MTPObject *o) 424 { 425 MTPObject *iter; 426 427 if (!o) { 428 return; 429 } 430 431 trace_usb_mtp_object_free(s->dev.addr, o->handle, o->path); 432 433 if (o->watchid != -1 && s->file_monitor) { 434 qemu_file_monitor_remove_watch(s->file_monitor, o->path, o->watchid); 435 } 436 437 QTAILQ_REMOVE(&s->objects, o, next); 438 if (o->parent) { 439 QLIST_REMOVE(o, list); 440 o->parent->nchildren--; 441 } 442 443 while (!QLIST_EMPTY(&o->children)) { 444 iter = QLIST_FIRST(&o->children); 445 usb_mtp_object_free(s, iter); 446 } 447 g_free(o->name); 448 g_free(o->path); 449 g_free(o); 450 } 451 452 static MTPObject *usb_mtp_object_lookup(MTPState *s, uint32_t handle) 453 { 454 MTPObject *o; 455 456 QTAILQ_FOREACH(o, &s->objects, next) { 457 if (o->handle == handle) { 458 return o; 459 } 460 } 461 return NULL; 462 } 463 464 static MTPObject *usb_mtp_add_child(MTPState *s, MTPObject *o, 465 const char *name) 466 { 467 MTPObject *child = 468 usb_mtp_object_alloc(s, s->next_handle++, o, name); 469 470 if (child) { 471 trace_usb_mtp_add_child(s->dev.addr, child->handle, child->path); 472 QLIST_INSERT_HEAD(&o->children, child, list); 473 o->nchildren++; 474 475 if (child->format == FMT_ASSOCIATION) { 476 QLIST_INIT(&child->children); 477 } 478 } 479 480 return child; 481 } 482 483 static MTPObject *usb_mtp_object_lookup_name(MTPObject *parent, 484 const char *name, int len) 485 { 486 MTPObject *iter; 487 488 if (len == -1) { 489 len = strlen(name); 490 } 491 492 QLIST_FOREACH(iter, &parent->children, list) { 493 if (strncmp(iter->name, name, len) == 0) { 494 return iter; 495 } 496 } 497 498 return NULL; 499 } 500 501 static MTPObject *usb_mtp_object_lookup_id(MTPState *s, int id) 502 { 503 MTPObject *iter; 504 505 QTAILQ_FOREACH(iter, &s->objects, next) { 506 if (iter->watchid == id) { 507 return iter; 508 } 509 } 510 511 return NULL; 512 } 513 514 static void file_monitor_event(int id, 515 QFileMonitorEvent ev, 516 const char *name, 517 void *opaque) 518 { 519 MTPState *s = opaque; 520 MTPObject *parent = usb_mtp_object_lookup_id(s, id); 521 MTPMonEntry *entry = NULL; 522 MTPObject *o; 523 524 if (!parent) { 525 return; 526 } 527 528 switch (ev) { 529 case QFILE_MONITOR_EVENT_CREATED: 530 if (usb_mtp_object_lookup_name(parent, name, -1)) { 531 /* Duplicate create event */ 532 return; 533 } 534 entry = g_new0(MTPMonEntry, 1); 535 entry->handle = s->next_handle; 536 entry->event = EVT_OBJ_ADDED; 537 o = usb_mtp_add_child(s, parent, name); 538 if (!o) { 539 g_free(entry); 540 return; 541 } 542 trace_usb_mtp_file_monitor_event(s->dev.addr, name, "Obj Added"); 543 break; 544 545 case QFILE_MONITOR_EVENT_DELETED: 546 /* 547 * The kernel issues a IN_IGNORED event 548 * when a dir containing a watchpoint is 549 * deleted, so we don't have to delete the 550 * watchpoint 551 */ 552 o = usb_mtp_object_lookup_name(parent, name, -1); 553 if (!o) { 554 return; 555 } 556 entry = g_new0(MTPMonEntry, 1); 557 entry->handle = o->handle; 558 entry->event = EVT_OBJ_REMOVED; 559 trace_usb_mtp_file_monitor_event(s->dev.addr, o->path, "Obj Deleted"); 560 usb_mtp_object_free(s, o); 561 break; 562 563 case QFILE_MONITOR_EVENT_MODIFIED: 564 o = usb_mtp_object_lookup_name(parent, name, -1); 565 if (!o) { 566 return; 567 } 568 entry = g_new0(MTPMonEntry, 1); 569 entry->handle = o->handle; 570 entry->event = EVT_OBJ_INFO_CHANGED; 571 trace_usb_mtp_file_monitor_event(s->dev.addr, o->path, "Obj Modified"); 572 break; 573 574 case QFILE_MONITOR_EVENT_IGNORED: 575 trace_usb_mtp_file_monitor_event(s->dev.addr, parent->path, 576 "Obj parent dir ignored"); 577 break; 578 579 case QFILE_MONITOR_EVENT_ATTRIBUTES: 580 break; 581 582 default: 583 g_assert_not_reached(); 584 } 585 586 if (entry) { 587 QTAILQ_INSERT_HEAD(&s->events, entry, next); 588 } 589 } 590 591 static void usb_mtp_file_monitor_cleanup(MTPState *s) 592 { 593 MTPMonEntry *e, *p; 594 595 QTAILQ_FOREACH_SAFE(e, &s->events, next, p) { 596 QTAILQ_REMOVE(&s->events, e, next); 597 g_free(e); 598 } 599 600 qemu_file_monitor_free(s->file_monitor); 601 s->file_monitor = NULL; 602 } 603 604 605 static void usb_mtp_object_readdir(MTPState *s, MTPObject *o) 606 { 607 struct dirent *entry; 608 DIR *dir; 609 int fd; 610 Error *err = NULL; 611 612 if (o->have_children) { 613 return; 614 } 615 o->have_children = true; 616 617 fd = open(o->path, O_DIRECTORY | O_CLOEXEC | O_NOFOLLOW); 618 if (fd < 0) { 619 return; 620 } 621 dir = fdopendir(fd); 622 if (!dir) { 623 close(fd); 624 return; 625 } 626 627 if (s->file_monitor) { 628 int id = qemu_file_monitor_add_watch(s->file_monitor, o->path, NULL, 629 file_monitor_event, s, &err); 630 if (id == -1) { 631 error_report("usb-mtp: failed to add watch for %s: %s", o->path, 632 error_get_pretty(err)); 633 error_free(err); 634 } else { 635 trace_usb_mtp_file_monitor_event(s->dev.addr, o->path, 636 "Watch Added"); 637 o->watchid = id; 638 } 639 } 640 641 while ((entry = readdir(dir)) != NULL) { 642 usb_mtp_add_child(s, o, entry->d_name); 643 } 644 closedir(dir); 645 } 646 647 /* ----------------------------------------------------------------------- */ 648 649 static MTPData *usb_mtp_data_alloc(MTPControl *c) 650 { 651 MTPData *data = g_new0(MTPData, 1); 652 653 data->code = c->code; 654 data->trans = c->trans; 655 data->fd = -1; 656 data->first = true; 657 return data; 658 } 659 660 static void usb_mtp_data_free(MTPData *data) 661 { 662 if (data == NULL) { 663 return; 664 } 665 if (data->fd != -1) { 666 close(data->fd); 667 } 668 g_free(data->data); 669 g_free(data); 670 } 671 672 static void usb_mtp_realloc(MTPData *data, uint32_t bytes) 673 { 674 if (data->length + bytes <= data->alloc) { 675 return; 676 } 677 data->alloc = (data->length + bytes + 0xff) & ~0xff; 678 data->data = g_realloc(data->data, data->alloc); 679 } 680 681 static void usb_mtp_add_u8(MTPData *data, uint8_t val) 682 { 683 usb_mtp_realloc(data, 1); 684 data->data[data->length++] = val; 685 } 686 687 static void usb_mtp_add_u16(MTPData *data, uint16_t val) 688 { 689 usb_mtp_realloc(data, 2); 690 data->data[data->length++] = (val >> 0) & 0xff; 691 data->data[data->length++] = (val >> 8) & 0xff; 692 } 693 694 static void usb_mtp_add_u32(MTPData *data, uint32_t val) 695 { 696 usb_mtp_realloc(data, 4); 697 data->data[data->length++] = (val >> 0) & 0xff; 698 data->data[data->length++] = (val >> 8) & 0xff; 699 data->data[data->length++] = (val >> 16) & 0xff; 700 data->data[data->length++] = (val >> 24) & 0xff; 701 } 702 703 static void usb_mtp_add_u64(MTPData *data, uint64_t val) 704 { 705 usb_mtp_realloc(data, 8); 706 data->data[data->length++] = (val >> 0) & 0xff; 707 data->data[data->length++] = (val >> 8) & 0xff; 708 data->data[data->length++] = (val >> 16) & 0xff; 709 data->data[data->length++] = (val >> 24) & 0xff; 710 data->data[data->length++] = (val >> 32) & 0xff; 711 data->data[data->length++] = (val >> 40) & 0xff; 712 data->data[data->length++] = (val >> 48) & 0xff; 713 data->data[data->length++] = (val >> 56) & 0xff; 714 } 715 716 static void usb_mtp_add_u16_array(MTPData *data, uint32_t len, 717 const uint16_t *vals) 718 { 719 int i; 720 721 usb_mtp_add_u32(data, len); 722 for (i = 0; i < len; i++) { 723 usb_mtp_add_u16(data, vals[i]); 724 } 725 } 726 727 static void usb_mtp_add_u32_array(MTPData *data, uint32_t len, 728 const uint32_t *vals) 729 { 730 int i; 731 732 usb_mtp_add_u32(data, len); 733 for (i = 0; i < len; i++) { 734 usb_mtp_add_u32(data, vals[i]); 735 } 736 } 737 738 static void usb_mtp_add_wstr(MTPData *data, const wchar_t *str) 739 { 740 uint32_t len = wcslen(str); 741 int i; 742 743 if (len > 0) { 744 len++; /* include terminating L'\0' */ 745 } 746 747 usb_mtp_add_u8(data, len); 748 for (i = 0; i < len; i++) { 749 usb_mtp_add_u16(data, str[i]); 750 } 751 } 752 753 static void usb_mtp_add_str(MTPData *data, const char *str) 754 { 755 uint32_t len = strlen(str)+1; 756 wchar_t *wstr = g_new(wchar_t, len); 757 size_t ret; 758 759 ret = mbstowcs(wstr, str, len); 760 if (ret == -1) { 761 usb_mtp_add_wstr(data, L"Oops"); 762 } else { 763 usb_mtp_add_wstr(data, wstr); 764 } 765 766 g_free(wstr); 767 } 768 769 static void usb_mtp_add_time(MTPData *data, time_t time) 770 { 771 char buf[16]; 772 struct tm tm; 773 774 gmtime_r(&time, &tm); 775 strftime(buf, sizeof(buf), "%Y%m%dT%H%M%S", &tm); 776 usb_mtp_add_str(data, buf); 777 } 778 779 /* ----------------------------------------------------------------------- */ 780 781 static void usb_mtp_queue_result(MTPState *s, uint16_t code, uint32_t trans, 782 int argc, uint32_t arg0, uint32_t arg1, 783 uint32_t arg2) 784 { 785 MTPControl *c = g_new0(MTPControl, 1); 786 787 c->code = code; 788 c->trans = trans; 789 c->argc = argc; 790 if (argc > 0) { 791 c->argv[0] = arg0; 792 } 793 if (argc > 1) { 794 c->argv[1] = arg1; 795 } 796 if (argc > 2) { 797 c->argv[2] = arg2; 798 } 799 800 assert(s->result == NULL); 801 s->result = c; 802 } 803 804 /* ----------------------------------------------------------------------- */ 805 806 static MTPData *usb_mtp_get_device_info(MTPState *s, MTPControl *c) 807 { 808 static const uint16_t ops[] = { 809 CMD_GET_DEVICE_INFO, 810 CMD_OPEN_SESSION, 811 CMD_CLOSE_SESSION, 812 CMD_GET_STORAGE_IDS, 813 CMD_GET_STORAGE_INFO, 814 CMD_GET_NUM_OBJECTS, 815 CMD_GET_OBJECT_HANDLES, 816 CMD_GET_OBJECT_INFO, 817 CMD_DELETE_OBJECT, 818 CMD_SEND_OBJECT_INFO, 819 CMD_SEND_OBJECT, 820 CMD_GET_OBJECT, 821 CMD_GET_PARTIAL_OBJECT, 822 CMD_GET_OBJECT_PROPS_SUPPORTED, 823 CMD_GET_OBJECT_PROP_DESC, 824 CMD_GET_OBJECT_PROP_VALUE, 825 }; 826 static const uint16_t fmt[] = { 827 FMT_UNDEFINED_OBJECT, 828 FMT_ASSOCIATION, 829 }; 830 MTPData *d = usb_mtp_data_alloc(c); 831 832 trace_usb_mtp_op_get_device_info(s->dev.addr); 833 834 usb_mtp_add_u16(d, 100); 835 usb_mtp_add_u32(d, 0x00000006); 836 usb_mtp_add_u16(d, 0x0064); 837 usb_mtp_add_wstr(d, L""); 838 usb_mtp_add_u16(d, 0x0000); 839 840 usb_mtp_add_u16_array(d, ARRAY_SIZE(ops), ops); 841 usb_mtp_add_u16_array(d, 0, NULL); 842 usb_mtp_add_u16_array(d, 0, NULL); 843 usb_mtp_add_u16_array(d, 0, NULL); 844 usb_mtp_add_u16_array(d, ARRAY_SIZE(fmt), fmt); 845 846 usb_mtp_add_wstr(d, L"" MTP_MANUFACTURER); 847 usb_mtp_add_wstr(d, L"" MTP_PRODUCT); 848 usb_mtp_add_wstr(d, L"0.1"); 849 usb_mtp_add_wstr(d, L"0123456789abcdef0123456789abcdef"); 850 851 return d; 852 } 853 854 static MTPData *usb_mtp_get_storage_ids(MTPState *s, MTPControl *c) 855 { 856 static const uint32_t ids[] = { 857 QEMU_STORAGE_ID, 858 }; 859 MTPData *d = usb_mtp_data_alloc(c); 860 861 trace_usb_mtp_op_get_storage_ids(s->dev.addr); 862 863 usb_mtp_add_u32_array(d, ARRAY_SIZE(ids), ids); 864 865 return d; 866 } 867 868 static MTPData *usb_mtp_get_storage_info(MTPState *s, MTPControl *c) 869 { 870 MTPData *d = usb_mtp_data_alloc(c); 871 struct statvfs buf; 872 int rc; 873 874 trace_usb_mtp_op_get_storage_info(s->dev.addr); 875 876 if (FLAG_SET(s, MTP_FLAG_WRITABLE)) { 877 usb_mtp_add_u16(d, 0x0003); 878 usb_mtp_add_u16(d, 0x0002); 879 usb_mtp_add_u16(d, 0x0000); 880 } else { 881 usb_mtp_add_u16(d, 0x0001); 882 usb_mtp_add_u16(d, 0x0002); 883 usb_mtp_add_u16(d, 0x0001); 884 } 885 886 rc = statvfs(s->root, &buf); 887 if (rc == 0) { 888 usb_mtp_add_u64(d, (uint64_t)buf.f_frsize * buf.f_blocks); 889 usb_mtp_add_u64(d, (uint64_t)buf.f_bavail * buf.f_blocks); 890 usb_mtp_add_u32(d, buf.f_ffree); 891 } else { 892 usb_mtp_add_u64(d, 0xffffffff); 893 usb_mtp_add_u64(d, 0xffffffff); 894 usb_mtp_add_u32(d, 0xffffffff); 895 } 896 897 usb_mtp_add_str(d, s->desc); 898 usb_mtp_add_wstr(d, L"123456789abcdef"); 899 return d; 900 } 901 902 static MTPData *usb_mtp_get_object_handles(MTPState *s, MTPControl *c, 903 MTPObject *o) 904 { 905 MTPData *d = usb_mtp_data_alloc(c); 906 uint32_t i = 0, handles[o->nchildren]; 907 MTPObject *iter; 908 909 trace_usb_mtp_op_get_object_handles(s->dev.addr, o->handle, o->path); 910 911 QLIST_FOREACH(iter, &o->children, list) { 912 handles[i++] = iter->handle; 913 } 914 assert(i == o->nchildren); 915 usb_mtp_add_u32_array(d, o->nchildren, handles); 916 917 return d; 918 } 919 920 static MTPData *usb_mtp_get_object_info(MTPState *s, MTPControl *c, 921 MTPObject *o) 922 { 923 MTPData *d = usb_mtp_data_alloc(c); 924 925 trace_usb_mtp_op_get_object_info(s->dev.addr, o->handle, o->path); 926 927 usb_mtp_add_u32(d, QEMU_STORAGE_ID); 928 usb_mtp_add_u16(d, o->format); 929 usb_mtp_add_u16(d, 0); 930 931 if (o->stat.st_size > 0xFFFFFFFF) { 932 usb_mtp_add_u32(d, 0xFFFFFFFF); 933 } else { 934 usb_mtp_add_u32(d, o->stat.st_size); 935 } 936 937 usb_mtp_add_u16(d, 0); 938 usb_mtp_add_u32(d, 0); 939 usb_mtp_add_u32(d, 0); 940 usb_mtp_add_u32(d, 0); 941 usb_mtp_add_u32(d, 0); 942 usb_mtp_add_u32(d, 0); 943 usb_mtp_add_u32(d, 0); 944 945 if (o->parent) { 946 usb_mtp_add_u32(d, o->parent->handle); 947 } else { 948 usb_mtp_add_u32(d, 0); 949 } 950 if (o->format == FMT_ASSOCIATION) { 951 usb_mtp_add_u16(d, 0x0001); 952 usb_mtp_add_u32(d, 0x00000001); 953 usb_mtp_add_u32(d, 0); 954 } else { 955 usb_mtp_add_u16(d, 0); 956 usb_mtp_add_u32(d, 0); 957 usb_mtp_add_u32(d, 0); 958 } 959 960 usb_mtp_add_str(d, o->name); 961 usb_mtp_add_time(d, o->stat.st_ctime); 962 usb_mtp_add_time(d, o->stat.st_mtime); 963 usb_mtp_add_wstr(d, L""); 964 965 return d; 966 } 967 968 static MTPData *usb_mtp_get_object(MTPState *s, MTPControl *c, 969 MTPObject *o) 970 { 971 MTPData *d = usb_mtp_data_alloc(c); 972 973 trace_usb_mtp_op_get_object(s->dev.addr, o->handle, o->path); 974 975 d->fd = open(o->path, O_RDONLY | O_CLOEXEC | O_NOFOLLOW); 976 if (d->fd == -1) { 977 usb_mtp_data_free(d); 978 return NULL; 979 } 980 d->length = o->stat.st_size; 981 d->alloc = 512; 982 d->data = g_malloc(d->alloc); 983 return d; 984 } 985 986 static MTPData *usb_mtp_get_partial_object(MTPState *s, MTPControl *c, 987 MTPObject *o) 988 { 989 MTPData *d; 990 off_t offset; 991 992 if (c->argc <= 2) { 993 return NULL; 994 } 995 trace_usb_mtp_op_get_partial_object(s->dev.addr, o->handle, o->path, 996 c->argv[1], c->argv[2]); 997 998 d = usb_mtp_data_alloc(c); 999 d->fd = open(o->path, O_RDONLY | O_CLOEXEC | O_NOFOLLOW); 1000 if (d->fd == -1) { 1001 usb_mtp_data_free(d); 1002 return NULL; 1003 } 1004 1005 offset = c->argv[1]; 1006 if (offset > o->stat.st_size) { 1007 offset = o->stat.st_size; 1008 } 1009 if (lseek(d->fd, offset, SEEK_SET) < 0) { 1010 usb_mtp_data_free(d); 1011 return NULL; 1012 } 1013 1014 d->length = c->argv[2]; 1015 if (d->length > o->stat.st_size - offset) { 1016 d->length = o->stat.st_size - offset; 1017 } 1018 1019 return d; 1020 } 1021 1022 static MTPData *usb_mtp_get_object_props_supported(MTPState *s, MTPControl *c) 1023 { 1024 static const uint16_t props[] = { 1025 PROP_STORAGE_ID, 1026 PROP_OBJECT_FORMAT, 1027 PROP_OBJECT_COMPRESSED_SIZE, 1028 PROP_PARENT_OBJECT, 1029 PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER, 1030 PROP_NAME, 1031 }; 1032 MTPData *d = usb_mtp_data_alloc(c); 1033 usb_mtp_add_u16_array(d, ARRAY_SIZE(props), props); 1034 1035 return d; 1036 } 1037 1038 static MTPData *usb_mtp_get_object_prop_desc(MTPState *s, MTPControl *c) 1039 { 1040 MTPData *d = usb_mtp_data_alloc(c); 1041 switch (c->argv[0]) { 1042 case PROP_STORAGE_ID: 1043 usb_mtp_add_u16(d, PROP_STORAGE_ID); 1044 usb_mtp_add_u16(d, DATA_TYPE_UINT32); 1045 usb_mtp_add_u8(d, 0x00); 1046 usb_mtp_add_u32(d, 0x00000000); 1047 usb_mtp_add_u32(d, 0x00000000); 1048 usb_mtp_add_u8(d, 0x00); 1049 break; 1050 case PROP_OBJECT_FORMAT: 1051 usb_mtp_add_u16(d, PROP_OBJECT_FORMAT); 1052 usb_mtp_add_u16(d, DATA_TYPE_UINT16); 1053 usb_mtp_add_u8(d, 0x00); 1054 usb_mtp_add_u16(d, 0x0000); 1055 usb_mtp_add_u32(d, 0x00000000); 1056 usb_mtp_add_u8(d, 0x00); 1057 break; 1058 case PROP_OBJECT_COMPRESSED_SIZE: 1059 usb_mtp_add_u16(d, PROP_OBJECT_COMPRESSED_SIZE); 1060 usb_mtp_add_u16(d, DATA_TYPE_UINT64); 1061 usb_mtp_add_u8(d, 0x00); 1062 usb_mtp_add_u64(d, 0x0000000000000000); 1063 usb_mtp_add_u32(d, 0x00000000); 1064 usb_mtp_add_u8(d, 0x00); 1065 break; 1066 case PROP_PARENT_OBJECT: 1067 usb_mtp_add_u16(d, PROP_PARENT_OBJECT); 1068 usb_mtp_add_u16(d, DATA_TYPE_UINT32); 1069 usb_mtp_add_u8(d, 0x00); 1070 usb_mtp_add_u32(d, 0x00000000); 1071 usb_mtp_add_u32(d, 0x00000000); 1072 usb_mtp_add_u8(d, 0x00); 1073 break; 1074 case PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER: 1075 usb_mtp_add_u16(d, PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER); 1076 usb_mtp_add_u16(d, DATA_TYPE_UINT128); 1077 usb_mtp_add_u8(d, 0x00); 1078 usb_mtp_add_u64(d, 0x0000000000000000); 1079 usb_mtp_add_u64(d, 0x0000000000000000); 1080 usb_mtp_add_u32(d, 0x00000000); 1081 usb_mtp_add_u8(d, 0x00); 1082 break; 1083 case PROP_NAME: 1084 usb_mtp_add_u16(d, PROP_NAME); 1085 usb_mtp_add_u16(d, DATA_TYPE_STRING); 1086 usb_mtp_add_u8(d, 0x00); 1087 usb_mtp_add_u8(d, 0x00); 1088 usb_mtp_add_u32(d, 0x00000000); 1089 usb_mtp_add_u8(d, 0x00); 1090 break; 1091 default: 1092 usb_mtp_data_free(d); 1093 return NULL; 1094 } 1095 1096 return d; 1097 } 1098 1099 static MTPData *usb_mtp_get_object_prop_value(MTPState *s, MTPControl *c, 1100 MTPObject *o) 1101 { 1102 MTPData *d = usb_mtp_data_alloc(c); 1103 switch (c->argv[1]) { 1104 case PROP_STORAGE_ID: 1105 usb_mtp_add_u32(d, QEMU_STORAGE_ID); 1106 break; 1107 case PROP_OBJECT_FORMAT: 1108 usb_mtp_add_u16(d, o->format); 1109 break; 1110 case PROP_OBJECT_COMPRESSED_SIZE: 1111 usb_mtp_add_u64(d, o->stat.st_size); 1112 break; 1113 case PROP_PARENT_OBJECT: 1114 if (o->parent == NULL) { 1115 usb_mtp_add_u32(d, 0x00000000); 1116 } else { 1117 usb_mtp_add_u32(d, o->parent->handle); 1118 } 1119 break; 1120 case PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER: 1121 /* Should be persistent between sessions, 1122 * but using our objedt ID is "good enough" 1123 * for now */ 1124 usb_mtp_add_u64(d, 0x0000000000000000); 1125 usb_mtp_add_u64(d, o->handle); 1126 break; 1127 case PROP_NAME: 1128 usb_mtp_add_str(d, o->name); 1129 break; 1130 default: 1131 usb_mtp_data_free(d); 1132 return NULL; 1133 } 1134 1135 return d; 1136 } 1137 1138 /* Return correct return code for a delete event */ 1139 enum { 1140 ALL_DELETE, 1141 PARTIAL_DELETE, 1142 READ_ONLY, 1143 }; 1144 1145 /* Assumes that children, if any, have been already freed */ 1146 static void usb_mtp_object_free_one(MTPState *s, MTPObject *o) 1147 { 1148 assert(o->nchildren == 0); 1149 QTAILQ_REMOVE(&s->objects, o, next); 1150 g_free(o->name); 1151 g_free(o->path); 1152 g_free(o); 1153 } 1154 1155 static int usb_mtp_deletefn(MTPState *s, MTPObject *o, uint32_t trans) 1156 { 1157 MTPObject *iter, *iter2; 1158 bool partial_delete = false; 1159 bool success = false; 1160 1161 /* 1162 * TODO: Add support for Protection Status 1163 */ 1164 1165 QLIST_FOREACH(iter, &o->children, list) { 1166 if (iter->format == FMT_ASSOCIATION) { 1167 QLIST_FOREACH(iter2, &iter->children, list) { 1168 usb_mtp_deletefn(s, iter2, trans); 1169 } 1170 } 1171 } 1172 1173 if (o->format == FMT_UNDEFINED_OBJECT) { 1174 if (remove(o->path)) { 1175 partial_delete = true; 1176 } else { 1177 usb_mtp_object_free_one(s, o); 1178 success = true; 1179 } 1180 } else if (o->format == FMT_ASSOCIATION) { 1181 if (rmdir(o->path)) { 1182 partial_delete = true; 1183 } else { 1184 usb_mtp_object_free_one(s, o); 1185 success = true; 1186 } 1187 } 1188 1189 if (success && partial_delete) { 1190 return PARTIAL_DELETE; 1191 } 1192 if (!success && partial_delete) { 1193 return READ_ONLY; 1194 } 1195 return ALL_DELETE; 1196 } 1197 1198 static void usb_mtp_object_delete(MTPState *s, uint32_t handle, 1199 uint32_t format_code, uint32_t trans) 1200 { 1201 MTPObject *o; 1202 int ret; 1203 1204 /* Return error if store is read-only */ 1205 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) { 1206 usb_mtp_queue_result(s, RES_STORE_READ_ONLY, 1207 trans, 0, 0, 0, 0); 1208 return; 1209 } 1210 1211 if (format_code != 0) { 1212 usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED, 1213 trans, 0, 0, 0, 0); 1214 return; 1215 } 1216 1217 if (handle == 0xFFFFFFF) { 1218 o = QTAILQ_FIRST(&s->objects); 1219 } else { 1220 o = usb_mtp_object_lookup(s, handle); 1221 } 1222 if (o == NULL) { 1223 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1224 trans, 0, 0, 0, 0); 1225 return; 1226 } 1227 1228 ret = usb_mtp_deletefn(s, o, trans); 1229 if (ret == PARTIAL_DELETE) { 1230 usb_mtp_queue_result(s, RES_PARTIAL_DELETE, 1231 trans, 0, 0, 0, 0); 1232 return; 1233 } else if (ret == READ_ONLY) { 1234 usb_mtp_queue_result(s, RES_STORE_READ_ONLY, trans, 1235 0, 0, 0, 0); 1236 return; 1237 } else { 1238 usb_mtp_queue_result(s, RES_OK, trans, 1239 0, 0, 0, 0); 1240 return; 1241 } 1242 } 1243 1244 static void usb_mtp_command(MTPState *s, MTPControl *c) 1245 { 1246 MTPData *data_in = NULL; 1247 MTPObject *o = NULL; 1248 uint32_t nres = 0, res0 = 0; 1249 Error *err = NULL; 1250 1251 /* sanity checks */ 1252 if (c->code >= CMD_CLOSE_SESSION && s->session == 0) { 1253 usb_mtp_queue_result(s, RES_SESSION_NOT_OPEN, 1254 c->trans, 0, 0, 0, 0); 1255 return; 1256 } 1257 1258 /* process commands */ 1259 switch (c->code) { 1260 case CMD_GET_DEVICE_INFO: 1261 data_in = usb_mtp_get_device_info(s, c); 1262 break; 1263 case CMD_OPEN_SESSION: 1264 if (s->session) { 1265 usb_mtp_queue_result(s, RES_SESSION_ALREADY_OPEN, 1266 c->trans, 1, s->session, 0, 0); 1267 return; 1268 } 1269 if (c->argv[0] == 0) { 1270 usb_mtp_queue_result(s, RES_INVALID_PARAMETER, 1271 c->trans, 0, 0, 0, 0); 1272 return; 1273 } 1274 trace_usb_mtp_op_open_session(s->dev.addr); 1275 s->session = c->argv[0]; 1276 usb_mtp_object_alloc(s, s->next_handle++, NULL, s->root); 1277 1278 s->file_monitor = qemu_file_monitor_new(&err); 1279 if (err) { 1280 error_report("usb-mtp: file monitoring init failed: %s", 1281 error_get_pretty(err)); 1282 error_free(err); 1283 } else { 1284 QTAILQ_INIT(&s->events); 1285 } 1286 break; 1287 case CMD_CLOSE_SESSION: 1288 trace_usb_mtp_op_close_session(s->dev.addr); 1289 s->session = 0; 1290 s->next_handle = 0; 1291 usb_mtp_file_monitor_cleanup(s); 1292 usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects)); 1293 assert(QTAILQ_EMPTY(&s->objects)); 1294 break; 1295 case CMD_GET_STORAGE_IDS: 1296 data_in = usb_mtp_get_storage_ids(s, c); 1297 break; 1298 case CMD_GET_STORAGE_INFO: 1299 if (c->argv[0] != QEMU_STORAGE_ID && 1300 c->argv[0] != 0xffffffff) { 1301 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID, 1302 c->trans, 0, 0, 0, 0); 1303 return; 1304 } 1305 data_in = usb_mtp_get_storage_info(s, c); 1306 break; 1307 case CMD_GET_NUM_OBJECTS: 1308 case CMD_GET_OBJECT_HANDLES: 1309 if (c->argv[0] != QEMU_STORAGE_ID && 1310 c->argv[0] != 0xffffffff) { 1311 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID, 1312 c->trans, 0, 0, 0, 0); 1313 return; 1314 } 1315 if (c->argv[1] != 0x00000000) { 1316 usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED, 1317 c->trans, 0, 0, 0, 0); 1318 return; 1319 } 1320 if (c->argv[2] == 0x00000000 || 1321 c->argv[2] == 0xffffffff) { 1322 o = QTAILQ_FIRST(&s->objects); 1323 } else { 1324 o = usb_mtp_object_lookup(s, c->argv[2]); 1325 } 1326 if (o == NULL) { 1327 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1328 c->trans, 0, 0, 0, 0); 1329 return; 1330 } 1331 if (o->format != FMT_ASSOCIATION) { 1332 usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT, 1333 c->trans, 0, 0, 0, 0); 1334 return; 1335 } 1336 usb_mtp_object_readdir(s, o); 1337 if (c->code == CMD_GET_NUM_OBJECTS) { 1338 trace_usb_mtp_op_get_num_objects(s->dev.addr, o->handle, o->path); 1339 nres = 1; 1340 res0 = o->nchildren; 1341 } else { 1342 data_in = usb_mtp_get_object_handles(s, c, o); 1343 } 1344 break; 1345 case CMD_GET_OBJECT_INFO: 1346 o = usb_mtp_object_lookup(s, c->argv[0]); 1347 if (o == NULL) { 1348 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1349 c->trans, 0, 0, 0, 0); 1350 return; 1351 } 1352 data_in = usb_mtp_get_object_info(s, c, o); 1353 break; 1354 case CMD_GET_OBJECT: 1355 o = usb_mtp_object_lookup(s, c->argv[0]); 1356 if (o == NULL) { 1357 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1358 c->trans, 0, 0, 0, 0); 1359 return; 1360 } 1361 if (o->format == FMT_ASSOCIATION) { 1362 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1363 c->trans, 0, 0, 0, 0); 1364 return; 1365 } 1366 data_in = usb_mtp_get_object(s, c, o); 1367 if (data_in == NULL) { 1368 usb_mtp_queue_result(s, RES_GENERAL_ERROR, 1369 c->trans, 0, 0, 0, 0); 1370 return; 1371 } 1372 break; 1373 case CMD_DELETE_OBJECT: 1374 usb_mtp_object_delete(s, c->argv[0], c->argv[1], c->trans); 1375 return; 1376 case CMD_GET_PARTIAL_OBJECT: 1377 o = usb_mtp_object_lookup(s, c->argv[0]); 1378 if (o == NULL) { 1379 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1380 c->trans, 0, 0, 0, 0); 1381 return; 1382 } 1383 if (o->format == FMT_ASSOCIATION) { 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_partial_object(s, c, o); 1389 if (data_in == NULL) { 1390 usb_mtp_queue_result(s, RES_GENERAL_ERROR, 1391 c->trans, 0, 0, 0, 0); 1392 return; 1393 } 1394 nres = 1; 1395 res0 = data_in->length; 1396 break; 1397 case CMD_SEND_OBJECT_INFO: 1398 /* Return error if store is read-only */ 1399 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) { 1400 usb_mtp_queue_result(s, RES_STORE_READ_ONLY, 1401 c->trans, 0, 0, 0, 0); 1402 } else if (c->argv[0] && (c->argv[0] != QEMU_STORAGE_ID)) { 1403 /* First parameter points to storage id or is 0 */ 1404 usb_mtp_queue_result(s, RES_STORE_NOT_AVAILABLE, c->trans, 1405 0, 0, 0, 0); 1406 } else if (c->argv[1] && !c->argv[0]) { 1407 /* If second parameter is specified, first must also be specified */ 1408 usb_mtp_queue_result(s, RES_DESTINATION_UNSUPPORTED, c->trans, 1409 0, 0, 0, 0); 1410 } else { 1411 uint32_t handle = c->argv[1]; 1412 if (handle == 0xFFFFFFFF || handle == 0) { 1413 /* root object */ 1414 o = QTAILQ_FIRST(&s->objects); 1415 } else { 1416 o = usb_mtp_object_lookup(s, handle); 1417 } 1418 if (o == NULL) { 1419 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, c->trans, 1420 0, 0, 0, 0); 1421 } else if (o->format != FMT_ASSOCIATION) { 1422 usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT, c->trans, 1423 0, 0, 0, 0); 1424 } 1425 } 1426 if (o) { 1427 s->dataset.parent_handle = o->handle; 1428 } 1429 s->data_out = usb_mtp_data_alloc(c); 1430 return; 1431 case CMD_SEND_OBJECT: 1432 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) { 1433 usb_mtp_queue_result(s, RES_STORE_READ_ONLY, 1434 c->trans, 0, 0, 0, 0); 1435 return; 1436 } 1437 if (!s->write_pending) { 1438 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, 1439 c->trans, 0, 0, 0, 0); 1440 return; 1441 } 1442 s->data_out = usb_mtp_data_alloc(c); 1443 return; 1444 case CMD_GET_OBJECT_PROPS_SUPPORTED: 1445 if (c->argv[0] != FMT_UNDEFINED_OBJECT && 1446 c->argv[0] != FMT_ASSOCIATION) { 1447 usb_mtp_queue_result(s, RES_INVALID_OBJECT_FORMAT_CODE, 1448 c->trans, 0, 0, 0, 0); 1449 return; 1450 } 1451 data_in = usb_mtp_get_object_props_supported(s, c); 1452 break; 1453 case CMD_GET_OBJECT_PROP_DESC: 1454 if (c->argv[1] != FMT_UNDEFINED_OBJECT && 1455 c->argv[1] != FMT_ASSOCIATION) { 1456 usb_mtp_queue_result(s, RES_INVALID_OBJECT_FORMAT_CODE, 1457 c->trans, 0, 0, 0, 0); 1458 return; 1459 } 1460 data_in = usb_mtp_get_object_prop_desc(s, c); 1461 if (data_in == NULL) { 1462 usb_mtp_queue_result(s, RES_INVALID_OBJECT_PROP_CODE, 1463 c->trans, 0, 0, 0, 0); 1464 return; 1465 } 1466 break; 1467 case CMD_GET_OBJECT_PROP_VALUE: 1468 o = usb_mtp_object_lookup(s, c->argv[0]); 1469 if (o == NULL) { 1470 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1471 c->trans, 0, 0, 0, 0); 1472 return; 1473 } 1474 data_in = usb_mtp_get_object_prop_value(s, c, o); 1475 if (data_in == NULL) { 1476 usb_mtp_queue_result(s, RES_INVALID_OBJECT_PROP_CODE, 1477 c->trans, 0, 0, 0, 0); 1478 return; 1479 } 1480 break; 1481 default: 1482 trace_usb_mtp_op_unknown(s->dev.addr, c->code); 1483 usb_mtp_queue_result(s, RES_OPERATION_NOT_SUPPORTED, 1484 c->trans, 0, 0, 0, 0); 1485 return; 1486 } 1487 1488 /* return results on success */ 1489 if (data_in) { 1490 assert(s->data_in == NULL); 1491 s->data_in = data_in; 1492 } 1493 usb_mtp_queue_result(s, RES_OK, c->trans, nres, res0, 0, 0); 1494 } 1495 1496 /* ----------------------------------------------------------------------- */ 1497 1498 static void usb_mtp_handle_reset(USBDevice *dev) 1499 { 1500 MTPState *s = USB_MTP(dev); 1501 1502 trace_usb_mtp_reset(s->dev.addr); 1503 1504 usb_mtp_file_monitor_cleanup(s); 1505 usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects)); 1506 s->session = 0; 1507 usb_mtp_data_free(s->data_in); 1508 s->data_in = NULL; 1509 usb_mtp_data_free(s->data_out); 1510 s->data_out = NULL; 1511 g_free(s->result); 1512 s->result = NULL; 1513 } 1514 1515 static void usb_mtp_handle_control(USBDevice *dev, USBPacket *p, 1516 int request, int value, int index, 1517 int length, uint8_t *data) 1518 { 1519 int ret; 1520 MTPState *s = USB_MTP(dev); 1521 uint16_t *event = (uint16_t *)data; 1522 1523 switch (request) { 1524 case ClassInterfaceOutRequest | 0x64: 1525 if (*event == EVT_CANCEL_TRANSACTION) { 1526 g_free(s->result); 1527 s->result = NULL; 1528 usb_mtp_data_free(s->data_in); 1529 s->data_in = NULL; 1530 if (s->write_pending) { 1531 g_free(s->dataset.filename); 1532 s->write_pending = false; 1533 s->dataset.size = 0; 1534 } 1535 usb_mtp_data_free(s->data_out); 1536 s->data_out = NULL; 1537 } else { 1538 p->status = USB_RET_STALL; 1539 } 1540 break; 1541 default: 1542 ret = usb_desc_handle_control(dev, p, request, 1543 value, index, length, data); 1544 if (ret >= 0) { 1545 return; 1546 } 1547 } 1548 1549 trace_usb_mtp_stall(dev->addr, "unknown control request"); 1550 } 1551 1552 static void usb_mtp_cancel_packet(USBDevice *dev, USBPacket *p) 1553 { 1554 /* we don't use async packets, so this should never be called */ 1555 fprintf(stderr, "%s\n", __func__); 1556 } 1557 1558 static char *utf16_to_str(uint8_t len, uint16_t *arr) 1559 { 1560 wchar_t *wstr = g_new0(wchar_t, len + 1); 1561 int count, dlen; 1562 char *dest; 1563 1564 for (count = 0; count < len; count++) { 1565 /* FIXME: not working for surrogate pairs */ 1566 wstr[count] = (wchar_t)arr[count]; 1567 } 1568 wstr[count] = 0; 1569 1570 dlen = wcstombs(NULL, wstr, 0) + 1; 1571 dest = g_malloc(dlen); 1572 wcstombs(dest, wstr, dlen); 1573 g_free(wstr); 1574 return dest; 1575 } 1576 1577 /* Wrapper around write, returns 0 on failure */ 1578 static uint64_t write_retry(int fd, void *buf, uint64_t size, off_t offset) 1579 { 1580 uint64_t ret = 0; 1581 1582 if (lseek(fd, offset, SEEK_SET) < 0) { 1583 goto done; 1584 } 1585 1586 ret = qemu_write_full(fd, buf, size); 1587 1588 done: 1589 return ret; 1590 } 1591 1592 static int usb_mtp_update_object(MTPObject *parent, char *name) 1593 { 1594 int ret = -1; 1595 1596 MTPObject *o = 1597 usb_mtp_object_lookup_name(parent, name, strlen(name)); 1598 1599 if (o) { 1600 ret = lstat(o->path, &o->stat); 1601 } 1602 1603 return ret; 1604 } 1605 1606 static int usb_mtp_write_data(MTPState *s) 1607 { 1608 MTPData *d = s->data_out; 1609 MTPObject *parent = 1610 usb_mtp_object_lookup(s, s->dataset.parent_handle); 1611 char *path = NULL; 1612 uint64_t rc; 1613 mode_t mask = 0644; 1614 int ret = 0; 1615 1616 assert(d != NULL); 1617 1618 switch (d->write_status) { 1619 case WRITE_START: 1620 if (!parent || !s->write_pending) { 1621 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, d->trans, 1622 0, 0, 0, 0); 1623 return 1; 1624 } 1625 1626 if (s->dataset.filename) { 1627 path = g_strdup_printf("%s/%s", parent->path, s->dataset.filename); 1628 if (s->dataset.format == FMT_ASSOCIATION) { 1629 ret = mkdir(path, mask); 1630 goto free; 1631 } 1632 d->fd = open(path, O_CREAT | O_WRONLY | 1633 O_CLOEXEC | O_NOFOLLOW, mask); 1634 if (d->fd == -1) { 1635 usb_mtp_queue_result(s, RES_STORE_FULL, d->trans, 1636 0, 0, 0, 0); 1637 goto done; 1638 } 1639 1640 /* Return success if initiator sent 0 sized data */ 1641 if (!s->dataset.size) { 1642 goto success; 1643 } 1644 if (d->length != MTP_WRITE_BUF_SZ && !d->pending) { 1645 d->write_status = WRITE_END; 1646 } 1647 } 1648 /* fall through */ 1649 case WRITE_CONTINUE: 1650 case WRITE_END: 1651 rc = write_retry(d->fd, d->data, d->data_offset, 1652 d->offset - d->data_offset); 1653 if (rc != d->data_offset) { 1654 usb_mtp_queue_result(s, RES_STORE_FULL, d->trans, 1655 0, 0, 0, 0); 1656 goto done; 1657 } 1658 if (d->write_status != WRITE_END) { 1659 g_free(path); 1660 return ret; 1661 } else { 1662 /* 1663 * Return an incomplete transfer if file size doesn't match 1664 * for < 4G file or if lstat fails which will result in an incorrect 1665 * file size 1666 */ 1667 if ((s->dataset.size != 0xFFFFFFFF && 1668 d->offset != s->dataset.size) || 1669 usb_mtp_update_object(parent, s->dataset.filename)) { 1670 usb_mtp_queue_result(s, RES_INCOMPLETE_TRANSFER, d->trans, 1671 0, 0, 0, 0); 1672 goto done; 1673 } 1674 } 1675 } 1676 1677 success: 1678 usb_mtp_queue_result(s, RES_OK, d->trans, 1679 0, 0, 0, 0); 1680 1681 done: 1682 /* 1683 * The write dataset is kept around and freed only 1684 * on success or if another write request comes in 1685 */ 1686 if (d->fd != -1) { 1687 close(d->fd); 1688 d->fd = -1; 1689 } 1690 free: 1691 g_free(s->dataset.filename); 1692 s->dataset.size = 0; 1693 g_free(path); 1694 s->write_pending = false; 1695 return ret; 1696 } 1697 1698 static void usb_mtp_write_metadata(MTPState *s, uint64_t dlen) 1699 { 1700 MTPData *d = s->data_out; 1701 ObjectInfo *dataset = (ObjectInfo *)d->data; 1702 char *filename; 1703 MTPObject *o; 1704 MTPObject *p = usb_mtp_object_lookup(s, s->dataset.parent_handle); 1705 uint32_t next_handle = s->next_handle; 1706 1707 assert(!s->write_pending); 1708 assert(p != NULL); 1709 1710 filename = utf16_to_str(MIN(dataset->length, 1711 dlen - offsetof(ObjectInfo, filename)), 1712 dataset->filename); 1713 1714 if (strchr(filename, '/')) { 1715 usb_mtp_queue_result(s, RES_PARAMETER_NOT_SUPPORTED, d->trans, 1716 0, 0, 0, 0); 1717 g_free(filename); 1718 return; 1719 } 1720 1721 o = usb_mtp_object_lookup_name(p, filename, dataset->length); 1722 if (o != NULL) { 1723 next_handle = o->handle; 1724 } 1725 1726 s->dataset.filename = filename; 1727 s->dataset.format = dataset->format; 1728 s->dataset.size = dataset->size; 1729 s->write_pending = true; 1730 1731 if (s->dataset.format == FMT_ASSOCIATION) { 1732 if (usb_mtp_write_data(s)) { 1733 /* next_handle will be allocated to the newly created dir */ 1734 usb_mtp_queue_result(s, RES_STORE_FULL, d->trans, 1735 0, 0, 0, 0); 1736 return; 1737 } 1738 } 1739 1740 usb_mtp_queue_result(s, RES_OK, d->trans, 3, QEMU_STORAGE_ID, 1741 s->dataset.parent_handle, next_handle); 1742 } 1743 1744 static void usb_mtp_get_data(MTPState *s, mtp_container *container, 1745 USBPacket *p) 1746 { 1747 MTPData *d = s->data_out; 1748 uint64_t dlen; 1749 uint32_t data_len = p->iov.size; 1750 uint64_t total_len; 1751 1752 if (!d) { 1753 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, 0, 1754 0, 0, 0, 0); 1755 return; 1756 } 1757 if (d->first) { 1758 /* Total length of incoming data */ 1759 total_len = cpu_to_le32(container->length) - sizeof(mtp_container); 1760 /* Length of data in this packet */ 1761 data_len -= sizeof(mtp_container); 1762 if (total_len < MTP_WRITE_BUF_SZ) { 1763 usb_mtp_realloc(d, total_len); 1764 d->length += total_len; 1765 } else { 1766 usb_mtp_realloc(d, MTP_WRITE_BUF_SZ - sizeof(mtp_container)); 1767 d->length += MTP_WRITE_BUF_SZ - sizeof(mtp_container); 1768 } 1769 d->offset = 0; 1770 d->first = false; 1771 d->pending = false; 1772 d->data_offset = 0; 1773 d->write_status = WRITE_START; 1774 } 1775 1776 if (d->pending) { 1777 memset(d->data, 0, d->length); 1778 if (d->length != MTP_WRITE_BUF_SZ) { 1779 usb_mtp_realloc(d, MTP_WRITE_BUF_SZ - d->length); 1780 d->length += (MTP_WRITE_BUF_SZ - d->length); 1781 } 1782 d->pending = false; 1783 d->write_status = WRITE_CONTINUE; 1784 d->data_offset = 0; 1785 } 1786 1787 if (d->length - d->data_offset > data_len) { 1788 dlen = data_len; 1789 } else { 1790 dlen = d->length - d->data_offset; 1791 } 1792 1793 switch (d->code) { 1794 case CMD_SEND_OBJECT_INFO: 1795 usb_packet_copy(p, d->data + d->data_offset, dlen); 1796 d->offset += dlen; 1797 d->data_offset += dlen; 1798 if (d->data_offset == d->length) { 1799 /* The operation might have already failed */ 1800 if (!s->result) { 1801 usb_mtp_write_metadata(s, dlen); 1802 } 1803 usb_mtp_data_free(s->data_out); 1804 s->data_out = NULL; 1805 return; 1806 } 1807 break; 1808 case CMD_SEND_OBJECT: 1809 usb_packet_copy(p, d->data + d->data_offset, dlen); 1810 d->offset += dlen; 1811 d->data_offset += dlen; 1812 if ((p->iov.size % 64) || !p->iov.size) { 1813 assert((s->dataset.size == 0xFFFFFFFF) || 1814 (s->dataset.size == d->offset)); 1815 1816 if (d->length == MTP_WRITE_BUF_SZ) { 1817 d->write_status = WRITE_END; 1818 } else { 1819 d->write_status = WRITE_START; 1820 } 1821 usb_mtp_write_data(s); 1822 usb_mtp_data_free(s->data_out); 1823 s->data_out = NULL; 1824 return; 1825 } 1826 if (d->data_offset == d->length) { 1827 d->pending = true; 1828 usb_mtp_write_data(s); 1829 } 1830 break; 1831 default: 1832 p->status = USB_RET_STALL; 1833 return; 1834 } 1835 } 1836 1837 static void usb_mtp_handle_data(USBDevice *dev, USBPacket *p) 1838 { 1839 MTPState *s = USB_MTP(dev); 1840 MTPControl cmd; 1841 mtp_container container; 1842 uint32_t params[5]; 1843 uint16_t container_type; 1844 int i, rc; 1845 1846 switch (p->ep->nr) { 1847 case EP_DATA_IN: 1848 if (s->data_out != NULL) { 1849 /* guest bug */ 1850 trace_usb_mtp_stall(s->dev.addr, "awaiting data-out"); 1851 p->status = USB_RET_STALL; 1852 return; 1853 } 1854 if (p->iov.size < sizeof(container)) { 1855 trace_usb_mtp_stall(s->dev.addr, "packet too small"); 1856 p->status = USB_RET_STALL; 1857 return; 1858 } 1859 if (s->data_in != NULL) { 1860 MTPData *d = s->data_in; 1861 uint64_t dlen = d->length - d->offset; 1862 if (d->first) { 1863 trace_usb_mtp_data_in(s->dev.addr, d->trans, d->length); 1864 if (d->length + sizeof(container) > 0xFFFFFFFF) { 1865 container.length = cpu_to_le32(0xFFFFFFFF); 1866 } else { 1867 container.length = 1868 cpu_to_le32(d->length + sizeof(container)); 1869 } 1870 container.type = cpu_to_le16(TYPE_DATA); 1871 container.code = cpu_to_le16(d->code); 1872 container.trans = cpu_to_le32(d->trans); 1873 usb_packet_copy(p, &container, sizeof(container)); 1874 d->first = false; 1875 if (dlen > p->iov.size - sizeof(container)) { 1876 dlen = p->iov.size - sizeof(container); 1877 } 1878 } else { 1879 if (dlen > p->iov.size) { 1880 dlen = p->iov.size; 1881 } 1882 } 1883 if (d->fd == -1) { 1884 usb_packet_copy(p, d->data + d->offset, dlen); 1885 } else { 1886 if (d->alloc < p->iov.size) { 1887 d->alloc = p->iov.size; 1888 d->data = g_realloc(d->data, d->alloc); 1889 } 1890 rc = read(d->fd, d->data, dlen); 1891 if (rc != dlen) { 1892 memset(d->data, 0, dlen); 1893 s->result->code = RES_INCOMPLETE_TRANSFER; 1894 } 1895 usb_packet_copy(p, d->data, dlen); 1896 } 1897 d->offset += dlen; 1898 if (d->offset == d->length) { 1899 usb_mtp_data_free(s->data_in); 1900 s->data_in = NULL; 1901 } 1902 } else if (s->result != NULL) { 1903 MTPControl *r = s->result; 1904 int length = sizeof(container) + r->argc * sizeof(uint32_t); 1905 if (r->code == RES_OK) { 1906 trace_usb_mtp_success(s->dev.addr, r->trans, 1907 (r->argc > 0) ? r->argv[0] : 0, 1908 (r->argc > 1) ? r->argv[1] : 0); 1909 } else { 1910 trace_usb_mtp_error(s->dev.addr, r->code, r->trans, 1911 (r->argc > 0) ? r->argv[0] : 0, 1912 (r->argc > 1) ? r->argv[1] : 0); 1913 } 1914 container.length = cpu_to_le32(length); 1915 container.type = cpu_to_le16(TYPE_RESPONSE); 1916 container.code = cpu_to_le16(r->code); 1917 container.trans = cpu_to_le32(r->trans); 1918 for (i = 0; i < r->argc; i++) { 1919 params[i] = cpu_to_le32(r->argv[i]); 1920 } 1921 usb_packet_copy(p, &container, sizeof(container)); 1922 usb_packet_copy(p, ¶ms, length - sizeof(container)); 1923 g_free(s->result); 1924 s->result = NULL; 1925 } 1926 break; 1927 case EP_DATA_OUT: 1928 if (p->iov.size < sizeof(container)) { 1929 trace_usb_mtp_stall(s->dev.addr, "packet too small"); 1930 p->status = USB_RET_STALL; 1931 return; 1932 } 1933 if ((s->data_out != NULL) && !s->data_out->first) { 1934 container_type = TYPE_DATA; 1935 } else { 1936 usb_packet_copy(p, &container, sizeof(container)); 1937 container_type = le16_to_cpu(container.type); 1938 } 1939 switch (container_type) { 1940 case TYPE_COMMAND: 1941 if (s->data_in || s->data_out || s->result) { 1942 trace_usb_mtp_stall(s->dev.addr, "transaction inflight"); 1943 p->status = USB_RET_STALL; 1944 return; 1945 } 1946 cmd.code = le16_to_cpu(container.code); 1947 cmd.argc = (le32_to_cpu(container.length) - sizeof(container)) 1948 / sizeof(uint32_t); 1949 cmd.trans = le32_to_cpu(container.trans); 1950 if (cmd.argc > ARRAY_SIZE(cmd.argv)) { 1951 cmd.argc = ARRAY_SIZE(cmd.argv); 1952 } 1953 if (p->iov.size < sizeof(container) + cmd.argc * sizeof(uint32_t)) { 1954 trace_usb_mtp_stall(s->dev.addr, "packet too small"); 1955 p->status = USB_RET_STALL; 1956 return; 1957 } 1958 usb_packet_copy(p, ¶ms, cmd.argc * sizeof(uint32_t)); 1959 for (i = 0; i < cmd.argc; i++) { 1960 cmd.argv[i] = le32_to_cpu(params[i]); 1961 } 1962 trace_usb_mtp_command(s->dev.addr, cmd.code, cmd.trans, 1963 (cmd.argc > 0) ? cmd.argv[0] : 0, 1964 (cmd.argc > 1) ? cmd.argv[1] : 0, 1965 (cmd.argc > 2) ? cmd.argv[2] : 0, 1966 (cmd.argc > 3) ? cmd.argv[3] : 0, 1967 (cmd.argc > 4) ? cmd.argv[4] : 0); 1968 usb_mtp_command(s, &cmd); 1969 break; 1970 case TYPE_DATA: 1971 /* One of the previous transfers has already errored but the 1972 * responder is still sending data associated with it 1973 */ 1974 if (s->result != NULL) { 1975 return; 1976 } 1977 usb_mtp_get_data(s, &container, p); 1978 break; 1979 default: 1980 /* not needed as long as the mtp device is read-only */ 1981 p->status = USB_RET_STALL; 1982 return; 1983 } 1984 break; 1985 case EP_EVENT: 1986 if (!QTAILQ_EMPTY(&s->events)) { 1987 struct MTPMonEntry *e = QTAILQ_LAST(&s->events); 1988 uint32_t handle; 1989 int len = sizeof(container) + sizeof(uint32_t); 1990 1991 if (p->iov.size < len) { 1992 trace_usb_mtp_stall(s->dev.addr, 1993 "packet too small to send event"); 1994 p->status = USB_RET_STALL; 1995 return; 1996 } 1997 1998 QTAILQ_REMOVE(&s->events, e, next); 1999 container.length = cpu_to_le32(len); 2000 container.type = cpu_to_le32(TYPE_EVENT); 2001 container.code = cpu_to_le16(e->event); 2002 container.trans = 0; /* no trans specific events */ 2003 handle = cpu_to_le32(e->handle); 2004 usb_packet_copy(p, &container, sizeof(container)); 2005 usb_packet_copy(p, &handle, sizeof(uint32_t)); 2006 g_free(e); 2007 return; 2008 } 2009 p->status = USB_RET_NAK; 2010 return; 2011 default: 2012 trace_usb_mtp_stall(s->dev.addr, "invalid endpoint"); 2013 p->status = USB_RET_STALL; 2014 return; 2015 } 2016 2017 if (p->actual_length == 0) { 2018 trace_usb_mtp_nak(s->dev.addr, p->ep->nr); 2019 p->status = USB_RET_NAK; 2020 return; 2021 } else { 2022 trace_usb_mtp_xfer(s->dev.addr, p->ep->nr, p->actual_length, 2023 p->iov.size); 2024 return; 2025 } 2026 } 2027 2028 static void usb_mtp_realize(USBDevice *dev, Error **errp) 2029 { 2030 MTPState *s = USB_MTP(dev); 2031 2032 usb_desc_create_serial(dev); 2033 usb_desc_init(dev); 2034 QTAILQ_INIT(&s->objects); 2035 if (s->desc == NULL) { 2036 if (s->root == NULL) { 2037 error_setg(errp, "usb-mtp: rootdir property must be configured"); 2038 return; 2039 } 2040 s->desc = strrchr(s->root, '/'); 2041 if (s->desc && s->desc[0]) { 2042 s->desc = g_strdup(s->desc + 1); 2043 } else { 2044 s->desc = g_strdup("none"); 2045 } 2046 } 2047 /* Mark store as RW */ 2048 if (!s->readonly) { 2049 s->flags |= (1 << MTP_FLAG_WRITABLE); 2050 } 2051 2052 } 2053 2054 static const VMStateDescription vmstate_usb_mtp = { 2055 .name = "usb-mtp", 2056 .unmigratable = 1, 2057 .version_id = 1, 2058 .minimum_version_id = 1, 2059 .fields = (VMStateField[]) { 2060 VMSTATE_USB_DEVICE(dev, MTPState), 2061 VMSTATE_END_OF_LIST() 2062 } 2063 }; 2064 2065 static Property mtp_properties[] = { 2066 DEFINE_PROP_STRING("rootdir", MTPState, root), 2067 DEFINE_PROP_STRING("desc", MTPState, desc), 2068 DEFINE_PROP_BOOL("readonly", MTPState, readonly, true), 2069 DEFINE_PROP_END_OF_LIST(), 2070 }; 2071 2072 static void usb_mtp_class_initfn(ObjectClass *klass, void *data) 2073 { 2074 DeviceClass *dc = DEVICE_CLASS(klass); 2075 USBDeviceClass *uc = USB_DEVICE_CLASS(klass); 2076 2077 uc->realize = usb_mtp_realize; 2078 uc->product_desc = "QEMU USB MTP"; 2079 uc->usb_desc = &desc; 2080 uc->cancel_packet = usb_mtp_cancel_packet; 2081 uc->handle_attach = usb_desc_attach; 2082 uc->handle_reset = usb_mtp_handle_reset; 2083 uc->handle_control = usb_mtp_handle_control; 2084 uc->handle_data = usb_mtp_handle_data; 2085 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 2086 dc->desc = "USB Media Transfer Protocol device"; 2087 dc->fw_name = "mtp"; 2088 dc->vmsd = &vmstate_usb_mtp; 2089 dc->props = mtp_properties; 2090 } 2091 2092 static TypeInfo mtp_info = { 2093 .name = TYPE_USB_MTP, 2094 .parent = TYPE_USB_DEVICE, 2095 .instance_size = sizeof(MTPState), 2096 .class_init = usb_mtp_class_initfn, 2097 }; 2098 2099 static void usb_mtp_register_types(void) 2100 { 2101 type_register_static(&mtp_info); 2102 } 2103 2104 type_init(usb_mtp_register_types) 2105