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 int64_t 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 uint8_t filename[0]; /* UTF-16 encoded */ 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, int64_t 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(int64_t 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 int64_t 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 /* 1139 * Return values when object @o is deleted. 1140 * If at least one of the deletions succeeded, 1141 * DELETE_SUCCESS is set and if at least one 1142 * of the deletions failed, DELETE_FAILURE is 1143 * set. Both bits being set (DELETE_PARTIAL) 1144 * signifies a RES_PARTIAL_DELETE being sent 1145 * back to the initiator. 1146 */ 1147 enum { 1148 DELETE_SUCCESS = (1 << 0), 1149 DELETE_FAILURE = (1 << 1), 1150 DELETE_PARTIAL = (DELETE_FAILURE | DELETE_SUCCESS), 1151 }; 1152 1153 static int usb_mtp_deletefn(MTPState *s, MTPObject *o, uint32_t trans) 1154 { 1155 MTPObject *iter, *iter2; 1156 int ret = 0; 1157 1158 /* 1159 * TODO: Add support for Protection Status 1160 */ 1161 1162 QLIST_FOREACH(iter, &o->children, list) { 1163 if (iter->format == FMT_ASSOCIATION) { 1164 QLIST_FOREACH(iter2, &iter->children, list) { 1165 ret |= usb_mtp_deletefn(s, iter2, trans); 1166 } 1167 } 1168 } 1169 1170 if (o->format == FMT_UNDEFINED_OBJECT) { 1171 if (remove(o->path)) { 1172 ret |= DELETE_FAILURE; 1173 } else { 1174 usb_mtp_object_free(s, o); 1175 ret |= DELETE_SUCCESS; 1176 } 1177 } else if (o->format == FMT_ASSOCIATION) { 1178 if (rmdir(o->path)) { 1179 ret |= DELETE_FAILURE; 1180 } else { 1181 usb_mtp_object_free(s, o); 1182 ret |= DELETE_SUCCESS; 1183 } 1184 } 1185 1186 return ret; 1187 } 1188 1189 static void usb_mtp_object_delete(MTPState *s, uint32_t handle, 1190 uint32_t format_code, uint32_t trans) 1191 { 1192 MTPObject *o; 1193 int ret; 1194 1195 /* Return error if store is read-only */ 1196 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) { 1197 usb_mtp_queue_result(s, RES_STORE_READ_ONLY, 1198 trans, 0, 0, 0, 0); 1199 return; 1200 } 1201 1202 if (format_code != 0) { 1203 usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED, 1204 trans, 0, 0, 0, 0); 1205 return; 1206 } 1207 1208 if (handle == 0xFFFFFFF) { 1209 o = QTAILQ_FIRST(&s->objects); 1210 } else { 1211 o = usb_mtp_object_lookup(s, handle); 1212 } 1213 if (o == NULL) { 1214 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1215 trans, 0, 0, 0, 0); 1216 return; 1217 } 1218 1219 ret = usb_mtp_deletefn(s, o, trans); 1220 switch (ret) { 1221 case DELETE_SUCCESS: 1222 usb_mtp_queue_result(s, RES_OK, trans, 1223 0, 0, 0, 0); 1224 break; 1225 case DELETE_FAILURE: 1226 usb_mtp_queue_result(s, RES_PARTIAL_DELETE, 1227 trans, 0, 0, 0, 0); 1228 break; 1229 case DELETE_PARTIAL: 1230 usb_mtp_queue_result(s, RES_PARTIAL_DELETE, 1231 trans, 0, 0, 0, 0); 1232 break; 1233 default: 1234 g_assert_not_reached(); 1235 } 1236 1237 return; 1238 } 1239 1240 static void usb_mtp_command(MTPState *s, MTPControl *c) 1241 { 1242 MTPData *data_in = NULL; 1243 MTPObject *o = NULL; 1244 uint32_t nres = 0, res0 = 0; 1245 Error *err = NULL; 1246 1247 /* sanity checks */ 1248 if (c->code >= CMD_CLOSE_SESSION && s->session == 0) { 1249 usb_mtp_queue_result(s, RES_SESSION_NOT_OPEN, 1250 c->trans, 0, 0, 0, 0); 1251 return; 1252 } 1253 1254 /* process commands */ 1255 switch (c->code) { 1256 case CMD_GET_DEVICE_INFO: 1257 data_in = usb_mtp_get_device_info(s, c); 1258 break; 1259 case CMD_OPEN_SESSION: 1260 if (s->session) { 1261 usb_mtp_queue_result(s, RES_SESSION_ALREADY_OPEN, 1262 c->trans, 1, s->session, 0, 0); 1263 return; 1264 } 1265 if (c->argv[0] == 0) { 1266 usb_mtp_queue_result(s, RES_INVALID_PARAMETER, 1267 c->trans, 0, 0, 0, 0); 1268 return; 1269 } 1270 trace_usb_mtp_op_open_session(s->dev.addr); 1271 s->session = c->argv[0]; 1272 usb_mtp_object_alloc(s, s->next_handle++, NULL, s->root); 1273 1274 s->file_monitor = qemu_file_monitor_new(&err); 1275 if (err) { 1276 error_report("usb-mtp: file monitoring init failed: %s", 1277 error_get_pretty(err)); 1278 error_free(err); 1279 } else { 1280 QTAILQ_INIT(&s->events); 1281 } 1282 break; 1283 case CMD_CLOSE_SESSION: 1284 trace_usb_mtp_op_close_session(s->dev.addr); 1285 s->session = 0; 1286 s->next_handle = 0; 1287 usb_mtp_file_monitor_cleanup(s); 1288 usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects)); 1289 assert(QTAILQ_EMPTY(&s->objects)); 1290 break; 1291 case CMD_GET_STORAGE_IDS: 1292 data_in = usb_mtp_get_storage_ids(s, c); 1293 break; 1294 case CMD_GET_STORAGE_INFO: 1295 if (c->argv[0] != QEMU_STORAGE_ID && 1296 c->argv[0] != 0xffffffff) { 1297 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID, 1298 c->trans, 0, 0, 0, 0); 1299 return; 1300 } 1301 data_in = usb_mtp_get_storage_info(s, c); 1302 break; 1303 case CMD_GET_NUM_OBJECTS: 1304 case CMD_GET_OBJECT_HANDLES: 1305 if (c->argv[0] != QEMU_STORAGE_ID && 1306 c->argv[0] != 0xffffffff) { 1307 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID, 1308 c->trans, 0, 0, 0, 0); 1309 return; 1310 } 1311 if (c->argv[1] != 0x00000000) { 1312 usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED, 1313 c->trans, 0, 0, 0, 0); 1314 return; 1315 } 1316 if (c->argv[2] == 0x00000000 || 1317 c->argv[2] == 0xffffffff) { 1318 o = QTAILQ_FIRST(&s->objects); 1319 } else { 1320 o = usb_mtp_object_lookup(s, c->argv[2]); 1321 } 1322 if (o == NULL) { 1323 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1324 c->trans, 0, 0, 0, 0); 1325 return; 1326 } 1327 if (o->format != FMT_ASSOCIATION) { 1328 usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT, 1329 c->trans, 0, 0, 0, 0); 1330 return; 1331 } 1332 usb_mtp_object_readdir(s, o); 1333 if (c->code == CMD_GET_NUM_OBJECTS) { 1334 trace_usb_mtp_op_get_num_objects(s->dev.addr, o->handle, o->path); 1335 nres = 1; 1336 res0 = o->nchildren; 1337 } else { 1338 data_in = usb_mtp_get_object_handles(s, c, o); 1339 } 1340 break; 1341 case CMD_GET_OBJECT_INFO: 1342 o = usb_mtp_object_lookup(s, c->argv[0]); 1343 if (o == NULL) { 1344 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1345 c->trans, 0, 0, 0, 0); 1346 return; 1347 } 1348 data_in = usb_mtp_get_object_info(s, c, o); 1349 break; 1350 case CMD_GET_OBJECT: 1351 o = usb_mtp_object_lookup(s, c->argv[0]); 1352 if (o == NULL) { 1353 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1354 c->trans, 0, 0, 0, 0); 1355 return; 1356 } 1357 if (o->format == FMT_ASSOCIATION) { 1358 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1359 c->trans, 0, 0, 0, 0); 1360 return; 1361 } 1362 data_in = usb_mtp_get_object(s, c, o); 1363 if (data_in == NULL) { 1364 usb_mtp_queue_result(s, RES_GENERAL_ERROR, 1365 c->trans, 0, 0, 0, 0); 1366 return; 1367 } 1368 break; 1369 case CMD_DELETE_OBJECT: 1370 usb_mtp_object_delete(s, c->argv[0], c->argv[1], c->trans); 1371 return; 1372 case CMD_GET_PARTIAL_OBJECT: 1373 o = usb_mtp_object_lookup(s, c->argv[0]); 1374 if (o == NULL) { 1375 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1376 c->trans, 0, 0, 0, 0); 1377 return; 1378 } 1379 if (o->format == FMT_ASSOCIATION) { 1380 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1381 c->trans, 0, 0, 0, 0); 1382 return; 1383 } 1384 data_in = usb_mtp_get_partial_object(s, c, o); 1385 if (data_in == NULL) { 1386 usb_mtp_queue_result(s, RES_GENERAL_ERROR, 1387 c->trans, 0, 0, 0, 0); 1388 return; 1389 } 1390 nres = 1; 1391 res0 = data_in->length; 1392 break; 1393 case CMD_SEND_OBJECT_INFO: 1394 /* Return error if store is read-only */ 1395 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) { 1396 usb_mtp_queue_result(s, RES_STORE_READ_ONLY, 1397 c->trans, 0, 0, 0, 0); 1398 } else if (c->argv[0] && (c->argv[0] != QEMU_STORAGE_ID)) { 1399 /* First parameter points to storage id or is 0 */ 1400 usb_mtp_queue_result(s, RES_STORE_NOT_AVAILABLE, c->trans, 1401 0, 0, 0, 0); 1402 } else if (c->argv[1] && !c->argv[0]) { 1403 /* If second parameter is specified, first must also be specified */ 1404 usb_mtp_queue_result(s, RES_DESTINATION_UNSUPPORTED, c->trans, 1405 0, 0, 0, 0); 1406 } else { 1407 uint32_t handle = c->argv[1]; 1408 if (handle == 0xFFFFFFFF || handle == 0) { 1409 /* root object */ 1410 o = QTAILQ_FIRST(&s->objects); 1411 } else { 1412 o = usb_mtp_object_lookup(s, handle); 1413 } 1414 if (o == NULL) { 1415 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, c->trans, 1416 0, 0, 0, 0); 1417 } else if (o->format != FMT_ASSOCIATION) { 1418 usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT, c->trans, 1419 0, 0, 0, 0); 1420 } 1421 } 1422 if (o) { 1423 s->dataset.parent_handle = o->handle; 1424 } 1425 s->data_out = usb_mtp_data_alloc(c); 1426 return; 1427 case CMD_SEND_OBJECT: 1428 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) { 1429 usb_mtp_queue_result(s, RES_STORE_READ_ONLY, 1430 c->trans, 0, 0, 0, 0); 1431 return; 1432 } 1433 if (!s->write_pending) { 1434 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, 1435 c->trans, 0, 0, 0, 0); 1436 return; 1437 } 1438 s->data_out = usb_mtp_data_alloc(c); 1439 return; 1440 case CMD_GET_OBJECT_PROPS_SUPPORTED: 1441 if (c->argv[0] != FMT_UNDEFINED_OBJECT && 1442 c->argv[0] != FMT_ASSOCIATION) { 1443 usb_mtp_queue_result(s, RES_INVALID_OBJECT_FORMAT_CODE, 1444 c->trans, 0, 0, 0, 0); 1445 return; 1446 } 1447 data_in = usb_mtp_get_object_props_supported(s, c); 1448 break; 1449 case CMD_GET_OBJECT_PROP_DESC: 1450 if (c->argv[1] != FMT_UNDEFINED_OBJECT && 1451 c->argv[1] != FMT_ASSOCIATION) { 1452 usb_mtp_queue_result(s, RES_INVALID_OBJECT_FORMAT_CODE, 1453 c->trans, 0, 0, 0, 0); 1454 return; 1455 } 1456 data_in = usb_mtp_get_object_prop_desc(s, c); 1457 if (data_in == NULL) { 1458 usb_mtp_queue_result(s, RES_INVALID_OBJECT_PROP_CODE, 1459 c->trans, 0, 0, 0, 0); 1460 return; 1461 } 1462 break; 1463 case CMD_GET_OBJECT_PROP_VALUE: 1464 o = usb_mtp_object_lookup(s, c->argv[0]); 1465 if (o == NULL) { 1466 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1467 c->trans, 0, 0, 0, 0); 1468 return; 1469 } 1470 data_in = usb_mtp_get_object_prop_value(s, c, o); 1471 if (data_in == NULL) { 1472 usb_mtp_queue_result(s, RES_INVALID_OBJECT_PROP_CODE, 1473 c->trans, 0, 0, 0, 0); 1474 return; 1475 } 1476 break; 1477 default: 1478 trace_usb_mtp_op_unknown(s->dev.addr, c->code); 1479 usb_mtp_queue_result(s, RES_OPERATION_NOT_SUPPORTED, 1480 c->trans, 0, 0, 0, 0); 1481 return; 1482 } 1483 1484 /* return results on success */ 1485 if (data_in) { 1486 assert(s->data_in == NULL); 1487 s->data_in = data_in; 1488 } 1489 usb_mtp_queue_result(s, RES_OK, c->trans, nres, res0, 0, 0); 1490 } 1491 1492 /* ----------------------------------------------------------------------- */ 1493 1494 static void usb_mtp_handle_reset(USBDevice *dev) 1495 { 1496 MTPState *s = USB_MTP(dev); 1497 1498 trace_usb_mtp_reset(s->dev.addr); 1499 1500 usb_mtp_file_monitor_cleanup(s); 1501 usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects)); 1502 s->session = 0; 1503 usb_mtp_data_free(s->data_in); 1504 s->data_in = NULL; 1505 usb_mtp_data_free(s->data_out); 1506 s->data_out = NULL; 1507 g_free(s->result); 1508 s->result = NULL; 1509 } 1510 1511 static void usb_mtp_handle_control(USBDevice *dev, USBPacket *p, 1512 int request, int value, int index, 1513 int length, uint8_t *data) 1514 { 1515 int ret; 1516 MTPState *s = USB_MTP(dev); 1517 uint16_t *event = (uint16_t *)data; 1518 1519 switch (request) { 1520 case ClassInterfaceOutRequest | 0x64: 1521 if (*event == EVT_CANCEL_TRANSACTION) { 1522 g_free(s->result); 1523 s->result = NULL; 1524 usb_mtp_data_free(s->data_in); 1525 s->data_in = NULL; 1526 if (s->write_pending) { 1527 g_free(s->dataset.filename); 1528 s->write_pending = false; 1529 s->dataset.size = 0; 1530 } 1531 usb_mtp_data_free(s->data_out); 1532 s->data_out = NULL; 1533 } else { 1534 p->status = USB_RET_STALL; 1535 } 1536 break; 1537 default: 1538 ret = usb_desc_handle_control(dev, p, request, 1539 value, index, length, data); 1540 if (ret >= 0) { 1541 return; 1542 } 1543 } 1544 1545 trace_usb_mtp_stall(dev->addr, "unknown control request"); 1546 } 1547 1548 static void usb_mtp_cancel_packet(USBDevice *dev, USBPacket *p) 1549 { 1550 /* we don't use async packets, so this should never be called */ 1551 fprintf(stderr, "%s\n", __func__); 1552 } 1553 1554 static char *utf16_to_str(uint8_t len, uint8_t *str16) 1555 { 1556 wchar_t *wstr = g_new0(wchar_t, len + 1); 1557 int count, dlen; 1558 char *dest; 1559 1560 for (count = 0; count < len; count++) { 1561 /* FIXME: not working for surrogate pairs */ 1562 wstr[count] = lduw_le_p(str16 + (count * 2)); 1563 } 1564 wstr[count] = 0; 1565 1566 dlen = wcstombs(NULL, wstr, 0) + 1; 1567 dest = g_malloc(dlen); 1568 wcstombs(dest, wstr, dlen); 1569 g_free(wstr); 1570 return dest; 1571 } 1572 1573 /* Wrapper around write, returns 0 on failure */ 1574 static uint64_t write_retry(int fd, void *buf, uint64_t size, off_t offset) 1575 { 1576 uint64_t ret = 0; 1577 1578 if (lseek(fd, offset, SEEK_SET) < 0) { 1579 goto done; 1580 } 1581 1582 ret = qemu_write_full(fd, buf, size); 1583 1584 done: 1585 return ret; 1586 } 1587 1588 static int usb_mtp_update_object(MTPObject *parent, char *name) 1589 { 1590 int ret = 0; 1591 1592 MTPObject *o = 1593 usb_mtp_object_lookup_name(parent, name, strlen(name)); 1594 1595 if (o) { 1596 ret = lstat(o->path, &o->stat); 1597 } 1598 1599 return ret; 1600 } 1601 1602 static int usb_mtp_write_data(MTPState *s) 1603 { 1604 MTPData *d = s->data_out; 1605 MTPObject *parent = 1606 usb_mtp_object_lookup(s, s->dataset.parent_handle); 1607 char *path = NULL; 1608 uint64_t rc; 1609 mode_t mask = 0644; 1610 int ret = 0; 1611 1612 assert(d != NULL); 1613 1614 switch (d->write_status) { 1615 case WRITE_START: 1616 if (!parent || !s->write_pending) { 1617 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, d->trans, 1618 0, 0, 0, 0); 1619 return 1; 1620 } 1621 1622 if (s->dataset.filename) { 1623 path = g_strdup_printf("%s/%s", parent->path, s->dataset.filename); 1624 if (s->dataset.format == FMT_ASSOCIATION) { 1625 ret = mkdir(path, mask); 1626 goto free; 1627 } 1628 d->fd = open(path, O_CREAT | O_WRONLY | 1629 O_CLOEXEC | O_NOFOLLOW, mask); 1630 if (d->fd == -1) { 1631 usb_mtp_queue_result(s, RES_STORE_FULL, d->trans, 1632 0, 0, 0, 0); 1633 goto done; 1634 } 1635 1636 /* Return success if initiator sent 0 sized data */ 1637 if (!s->dataset.size) { 1638 goto success; 1639 } 1640 if (d->length != MTP_WRITE_BUF_SZ && !d->pending) { 1641 d->write_status = WRITE_END; 1642 } 1643 } 1644 /* fall through */ 1645 case WRITE_CONTINUE: 1646 case WRITE_END: 1647 rc = write_retry(d->fd, d->data, d->data_offset, 1648 d->offset - d->data_offset); 1649 if (rc != d->data_offset) { 1650 usb_mtp_queue_result(s, RES_STORE_FULL, d->trans, 1651 0, 0, 0, 0); 1652 goto done; 1653 } 1654 if (d->write_status != WRITE_END) { 1655 g_free(path); 1656 return ret; 1657 } else { 1658 /* 1659 * Return an incomplete transfer if file size doesn't match 1660 * for < 4G file or if lstat fails which will result in an incorrect 1661 * file size 1662 */ 1663 if ((s->dataset.size != 0xFFFFFFFF && 1664 d->offset != s->dataset.size) || 1665 usb_mtp_update_object(parent, s->dataset.filename)) { 1666 usb_mtp_queue_result(s, RES_INCOMPLETE_TRANSFER, d->trans, 1667 0, 0, 0, 0); 1668 goto done; 1669 } 1670 } 1671 } 1672 1673 success: 1674 usb_mtp_queue_result(s, RES_OK, d->trans, 1675 0, 0, 0, 0); 1676 1677 done: 1678 /* 1679 * The write dataset is kept around and freed only 1680 * on success or if another write request comes in 1681 */ 1682 if (d->fd != -1) { 1683 close(d->fd); 1684 d->fd = -1; 1685 } 1686 free: 1687 g_free(s->dataset.filename); 1688 s->dataset.size = 0; 1689 g_free(path); 1690 s->write_pending = false; 1691 return ret; 1692 } 1693 1694 static void usb_mtp_write_metadata(MTPState *s, uint64_t dlen) 1695 { 1696 MTPData *d = s->data_out; 1697 ObjectInfo *dataset = (ObjectInfo *)d->data; 1698 char *filename; 1699 MTPObject *o; 1700 MTPObject *p = usb_mtp_object_lookup(s, s->dataset.parent_handle); 1701 uint32_t next_handle = s->next_handle; 1702 size_t filename_chars = dlen - offsetof(ObjectInfo, filename); 1703 1704 /* 1705 * filename is utf-16. We're intentionally doing 1706 * integer division to truncate if malicious guest 1707 * sent an odd number of bytes. 1708 */ 1709 filename_chars /= 2; 1710 1711 assert(!s->write_pending); 1712 assert(p != NULL); 1713 1714 filename = utf16_to_str(MIN(dataset->length, filename_chars), 1715 dataset->filename); 1716 1717 if (strchr(filename, '/')) { 1718 usb_mtp_queue_result(s, RES_PARAMETER_NOT_SUPPORTED, d->trans, 1719 0, 0, 0, 0); 1720 g_free(filename); 1721 return; 1722 } 1723 1724 o = usb_mtp_object_lookup_name(p, filename, -1); 1725 if (o != NULL) { 1726 next_handle = o->handle; 1727 } 1728 1729 s->dataset.filename = filename; 1730 s->dataset.format = dataset->format; 1731 s->dataset.size = dataset->size; 1732 s->write_pending = true; 1733 1734 if (s->dataset.format == FMT_ASSOCIATION) { 1735 if (usb_mtp_write_data(s)) { 1736 /* next_handle will be allocated to the newly created dir */ 1737 usb_mtp_queue_result(s, RES_STORE_FULL, d->trans, 1738 0, 0, 0, 0); 1739 return; 1740 } 1741 } 1742 1743 usb_mtp_queue_result(s, RES_OK, d->trans, 3, QEMU_STORAGE_ID, 1744 s->dataset.parent_handle, next_handle); 1745 } 1746 1747 static void usb_mtp_get_data(MTPState *s, mtp_container *container, 1748 USBPacket *p) 1749 { 1750 MTPData *d = s->data_out; 1751 uint64_t dlen; 1752 uint32_t data_len = p->iov.size; 1753 uint64_t total_len; 1754 1755 if (!d) { 1756 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, 0, 1757 0, 0, 0, 0); 1758 return; 1759 } 1760 if (d->first) { 1761 /* Total length of incoming data */ 1762 total_len = cpu_to_le32(container->length) - sizeof(mtp_container); 1763 /* Length of data in this packet */ 1764 data_len -= sizeof(mtp_container); 1765 if (total_len < MTP_WRITE_BUF_SZ) { 1766 usb_mtp_realloc(d, total_len); 1767 d->length += total_len; 1768 } else { 1769 usb_mtp_realloc(d, MTP_WRITE_BUF_SZ - sizeof(mtp_container)); 1770 d->length += MTP_WRITE_BUF_SZ - sizeof(mtp_container); 1771 } 1772 d->offset = 0; 1773 d->first = false; 1774 d->pending = false; 1775 d->data_offset = 0; 1776 d->write_status = WRITE_START; 1777 } 1778 1779 if (d->pending) { 1780 memset(d->data, 0, d->length); 1781 if (d->length != MTP_WRITE_BUF_SZ) { 1782 usb_mtp_realloc(d, MTP_WRITE_BUF_SZ - d->length); 1783 d->length += (MTP_WRITE_BUF_SZ - d->length); 1784 } 1785 d->pending = false; 1786 d->write_status = WRITE_CONTINUE; 1787 d->data_offset = 0; 1788 } 1789 1790 if (d->length - d->data_offset > data_len) { 1791 dlen = data_len; 1792 } else { 1793 dlen = d->length - d->data_offset; 1794 } 1795 1796 switch (d->code) { 1797 case CMD_SEND_OBJECT_INFO: 1798 usb_packet_copy(p, d->data + d->data_offset, dlen); 1799 d->offset += dlen; 1800 d->data_offset += dlen; 1801 if (d->data_offset == d->length) { 1802 /* The operation might have already failed */ 1803 if (!s->result) { 1804 usb_mtp_write_metadata(s, dlen); 1805 } 1806 usb_mtp_data_free(s->data_out); 1807 s->data_out = NULL; 1808 return; 1809 } 1810 break; 1811 case CMD_SEND_OBJECT: 1812 usb_packet_copy(p, d->data + d->data_offset, dlen); 1813 d->offset += dlen; 1814 d->data_offset += dlen; 1815 if ((p->iov.size % 64) || !p->iov.size) { 1816 assert((s->dataset.size == 0xFFFFFFFF) || 1817 (s->dataset.size == d->offset)); 1818 1819 if (d->length == MTP_WRITE_BUF_SZ) { 1820 d->write_status = WRITE_END; 1821 } else { 1822 d->write_status = WRITE_START; 1823 } 1824 usb_mtp_write_data(s); 1825 usb_mtp_data_free(s->data_out); 1826 s->data_out = NULL; 1827 return; 1828 } 1829 if (d->data_offset == d->length) { 1830 d->pending = true; 1831 usb_mtp_write_data(s); 1832 } 1833 break; 1834 default: 1835 p->status = USB_RET_STALL; 1836 return; 1837 } 1838 } 1839 1840 static void usb_mtp_handle_data(USBDevice *dev, USBPacket *p) 1841 { 1842 MTPState *s = USB_MTP(dev); 1843 MTPControl cmd; 1844 mtp_container container; 1845 uint32_t params[5]; 1846 uint16_t container_type; 1847 int i, rc; 1848 1849 switch (p->ep->nr) { 1850 case EP_DATA_IN: 1851 if (s->data_out != NULL) { 1852 /* guest bug */ 1853 trace_usb_mtp_stall(s->dev.addr, "awaiting data-out"); 1854 p->status = USB_RET_STALL; 1855 return; 1856 } 1857 if (p->iov.size < sizeof(container)) { 1858 trace_usb_mtp_stall(s->dev.addr, "packet too small"); 1859 p->status = USB_RET_STALL; 1860 return; 1861 } 1862 if (s->data_in != NULL) { 1863 MTPData *d = s->data_in; 1864 uint64_t dlen = d->length - d->offset; 1865 if (d->first) { 1866 trace_usb_mtp_data_in(s->dev.addr, d->trans, d->length); 1867 if (d->length + sizeof(container) > 0xFFFFFFFF) { 1868 container.length = cpu_to_le32(0xFFFFFFFF); 1869 } else { 1870 container.length = 1871 cpu_to_le32(d->length + sizeof(container)); 1872 } 1873 container.type = cpu_to_le16(TYPE_DATA); 1874 container.code = cpu_to_le16(d->code); 1875 container.trans = cpu_to_le32(d->trans); 1876 usb_packet_copy(p, &container, sizeof(container)); 1877 d->first = false; 1878 if (dlen > p->iov.size - sizeof(container)) { 1879 dlen = p->iov.size - sizeof(container); 1880 } 1881 } else { 1882 if (dlen > p->iov.size) { 1883 dlen = p->iov.size; 1884 } 1885 } 1886 if (d->fd == -1) { 1887 usb_packet_copy(p, d->data + d->offset, dlen); 1888 } else { 1889 if (d->alloc < p->iov.size) { 1890 d->alloc = p->iov.size; 1891 d->data = g_realloc(d->data, d->alloc); 1892 } 1893 rc = read(d->fd, d->data, dlen); 1894 if (rc != dlen) { 1895 memset(d->data, 0, dlen); 1896 s->result->code = RES_INCOMPLETE_TRANSFER; 1897 } 1898 usb_packet_copy(p, d->data, dlen); 1899 } 1900 d->offset += dlen; 1901 if (d->offset == d->length) { 1902 usb_mtp_data_free(s->data_in); 1903 s->data_in = NULL; 1904 } 1905 } else if (s->result != NULL) { 1906 MTPControl *r = s->result; 1907 int length = sizeof(container) + r->argc * sizeof(uint32_t); 1908 if (r->code == RES_OK) { 1909 trace_usb_mtp_success(s->dev.addr, r->trans, 1910 (r->argc > 0) ? r->argv[0] : 0, 1911 (r->argc > 1) ? r->argv[1] : 0); 1912 } else { 1913 trace_usb_mtp_error(s->dev.addr, r->code, r->trans, 1914 (r->argc > 0) ? r->argv[0] : 0, 1915 (r->argc > 1) ? r->argv[1] : 0); 1916 } 1917 container.length = cpu_to_le32(length); 1918 container.type = cpu_to_le16(TYPE_RESPONSE); 1919 container.code = cpu_to_le16(r->code); 1920 container.trans = cpu_to_le32(r->trans); 1921 for (i = 0; i < r->argc; i++) { 1922 params[i] = cpu_to_le32(r->argv[i]); 1923 } 1924 usb_packet_copy(p, &container, sizeof(container)); 1925 usb_packet_copy(p, ¶ms, length - sizeof(container)); 1926 g_free(s->result); 1927 s->result = NULL; 1928 } 1929 break; 1930 case EP_DATA_OUT: 1931 if (p->iov.size < sizeof(container)) { 1932 trace_usb_mtp_stall(s->dev.addr, "packet too small"); 1933 p->status = USB_RET_STALL; 1934 return; 1935 } 1936 if ((s->data_out != NULL) && !s->data_out->first) { 1937 container_type = TYPE_DATA; 1938 } else { 1939 usb_packet_copy(p, &container, sizeof(container)); 1940 container_type = le16_to_cpu(container.type); 1941 } 1942 switch (container_type) { 1943 case TYPE_COMMAND: 1944 if (s->data_in || s->data_out || s->result) { 1945 trace_usb_mtp_stall(s->dev.addr, "transaction inflight"); 1946 p->status = USB_RET_STALL; 1947 return; 1948 } 1949 cmd.code = le16_to_cpu(container.code); 1950 cmd.argc = (le32_to_cpu(container.length) - sizeof(container)) 1951 / sizeof(uint32_t); 1952 cmd.trans = le32_to_cpu(container.trans); 1953 if (cmd.argc > ARRAY_SIZE(cmd.argv)) { 1954 cmd.argc = ARRAY_SIZE(cmd.argv); 1955 } 1956 if (p->iov.size < sizeof(container) + cmd.argc * sizeof(uint32_t)) { 1957 trace_usb_mtp_stall(s->dev.addr, "packet too small"); 1958 p->status = USB_RET_STALL; 1959 return; 1960 } 1961 usb_packet_copy(p, ¶ms, cmd.argc * sizeof(uint32_t)); 1962 for (i = 0; i < cmd.argc; i++) { 1963 cmd.argv[i] = le32_to_cpu(params[i]); 1964 } 1965 trace_usb_mtp_command(s->dev.addr, cmd.code, cmd.trans, 1966 (cmd.argc > 0) ? cmd.argv[0] : 0, 1967 (cmd.argc > 1) ? cmd.argv[1] : 0, 1968 (cmd.argc > 2) ? cmd.argv[2] : 0, 1969 (cmd.argc > 3) ? cmd.argv[3] : 0, 1970 (cmd.argc > 4) ? cmd.argv[4] : 0); 1971 usb_mtp_command(s, &cmd); 1972 break; 1973 case TYPE_DATA: 1974 /* One of the previous transfers has already errored but the 1975 * responder is still sending data associated with it 1976 */ 1977 if (s->result != NULL) { 1978 return; 1979 } 1980 usb_mtp_get_data(s, &container, p); 1981 break; 1982 default: 1983 /* not needed as long as the mtp device is read-only */ 1984 p->status = USB_RET_STALL; 1985 return; 1986 } 1987 break; 1988 case EP_EVENT: 1989 if (!QTAILQ_EMPTY(&s->events)) { 1990 struct MTPMonEntry *e = QTAILQ_LAST(&s->events); 1991 uint32_t handle; 1992 int len = sizeof(container) + sizeof(uint32_t); 1993 1994 if (p->iov.size < len) { 1995 trace_usb_mtp_stall(s->dev.addr, 1996 "packet too small to send event"); 1997 p->status = USB_RET_STALL; 1998 return; 1999 } 2000 2001 QTAILQ_REMOVE(&s->events, e, next); 2002 container.length = cpu_to_le32(len); 2003 container.type = cpu_to_le32(TYPE_EVENT); 2004 container.code = cpu_to_le16(e->event); 2005 container.trans = 0; /* no trans specific events */ 2006 handle = cpu_to_le32(e->handle); 2007 usb_packet_copy(p, &container, sizeof(container)); 2008 usb_packet_copy(p, &handle, sizeof(uint32_t)); 2009 g_free(e); 2010 return; 2011 } 2012 p->status = USB_RET_NAK; 2013 return; 2014 default: 2015 trace_usb_mtp_stall(s->dev.addr, "invalid endpoint"); 2016 p->status = USB_RET_STALL; 2017 return; 2018 } 2019 2020 if (p->actual_length == 0) { 2021 trace_usb_mtp_nak(s->dev.addr, p->ep->nr); 2022 p->status = USB_RET_NAK; 2023 return; 2024 } else { 2025 trace_usb_mtp_xfer(s->dev.addr, p->ep->nr, p->actual_length, 2026 p->iov.size); 2027 return; 2028 } 2029 } 2030 2031 static void usb_mtp_realize(USBDevice *dev, Error **errp) 2032 { 2033 MTPState *s = USB_MTP(dev); 2034 2035 usb_desc_create_serial(dev); 2036 usb_desc_init(dev); 2037 QTAILQ_INIT(&s->objects); 2038 if (s->desc == NULL) { 2039 if (s->root == NULL) { 2040 error_setg(errp, "usb-mtp: rootdir property must be configured"); 2041 return; 2042 } 2043 s->desc = strrchr(s->root, '/'); 2044 if (s->desc && s->desc[0]) { 2045 s->desc = g_strdup(s->desc + 1); 2046 } else { 2047 s->desc = g_strdup("none"); 2048 } 2049 } 2050 /* Mark store as RW */ 2051 if (!s->readonly) { 2052 s->flags |= (1 << MTP_FLAG_WRITABLE); 2053 } 2054 2055 } 2056 2057 static const VMStateDescription vmstate_usb_mtp = { 2058 .name = "usb-mtp", 2059 .unmigratable = 1, 2060 .version_id = 1, 2061 .minimum_version_id = 1, 2062 .fields = (VMStateField[]) { 2063 VMSTATE_USB_DEVICE(dev, MTPState), 2064 VMSTATE_END_OF_LIST() 2065 } 2066 }; 2067 2068 static Property mtp_properties[] = { 2069 DEFINE_PROP_STRING("rootdir", MTPState, root), 2070 DEFINE_PROP_STRING("desc", MTPState, desc), 2071 DEFINE_PROP_BOOL("readonly", MTPState, readonly, true), 2072 DEFINE_PROP_END_OF_LIST(), 2073 }; 2074 2075 static void usb_mtp_class_initfn(ObjectClass *klass, void *data) 2076 { 2077 DeviceClass *dc = DEVICE_CLASS(klass); 2078 USBDeviceClass *uc = USB_DEVICE_CLASS(klass); 2079 2080 uc->realize = usb_mtp_realize; 2081 uc->product_desc = "QEMU USB MTP"; 2082 uc->usb_desc = &desc; 2083 uc->cancel_packet = usb_mtp_cancel_packet; 2084 uc->handle_attach = usb_desc_attach; 2085 uc->handle_reset = usb_mtp_handle_reset; 2086 uc->handle_control = usb_mtp_handle_control; 2087 uc->handle_data = usb_mtp_handle_data; 2088 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 2089 dc->desc = "USB Media Transfer Protocol device"; 2090 dc->fw_name = "mtp"; 2091 dc->vmsd = &vmstate_usb_mtp; 2092 dc->props = mtp_properties; 2093 } 2094 2095 static TypeInfo mtp_info = { 2096 .name = TYPE_USB_MTP, 2097 .parent = TYPE_USB_DEVICE, 2098 .instance_size = sizeof(MTPState), 2099 .class_init = usb_mtp_class_initfn, 2100 }; 2101 2102 static void usb_mtp_register_types(void) 2103 { 2104 type_register_static(&mtp_info); 2105 } 2106 2107 type_init(usb_mtp_register_types) 2108