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 "qemu-common.h" 14 #include "qapi/error.h" 15 #include "qemu/error-report.h" 16 #include <wchar.h> 17 #include <dirent.h> 18 19 #include <sys/statvfs.h> 20 21 22 #include "qemu/iov.h" 23 #include "qemu/module.h" 24 #include "qemu/filemonitor.h" 25 #include "trace.h" 26 #include "hw/qdev-properties.h" 27 #include "hw/usb.h" 28 #include "migration/vmstate.h" 29 #include "desc.h" 30 #include "qemu/units.h" 31 32 /* ----------------------------------------------------------------------- */ 33 34 enum mtp_container_type { 35 TYPE_COMMAND = 1, 36 TYPE_DATA = 2, 37 TYPE_RESPONSE = 3, 38 TYPE_EVENT = 4, 39 }; 40 41 /* MTP write stage, for internal use only */ 42 enum mtp_write_status { 43 WRITE_START = 1, 44 WRITE_CONTINUE = 2, 45 WRITE_END = 3, 46 }; 47 48 enum mtp_code { 49 /* command codes */ 50 CMD_GET_DEVICE_INFO = 0x1001, 51 CMD_OPEN_SESSION = 0x1002, 52 CMD_CLOSE_SESSION = 0x1003, 53 CMD_GET_STORAGE_IDS = 0x1004, 54 CMD_GET_STORAGE_INFO = 0x1005, 55 CMD_GET_NUM_OBJECTS = 0x1006, 56 CMD_GET_OBJECT_HANDLES = 0x1007, 57 CMD_GET_OBJECT_INFO = 0x1008, 58 CMD_GET_OBJECT = 0x1009, 59 CMD_DELETE_OBJECT = 0x100b, 60 CMD_SEND_OBJECT_INFO = 0x100c, 61 CMD_SEND_OBJECT = 0x100d, 62 CMD_GET_PARTIAL_OBJECT = 0x101b, 63 CMD_GET_OBJECT_PROPS_SUPPORTED = 0x9801, 64 CMD_GET_OBJECT_PROP_DESC = 0x9802, 65 CMD_GET_OBJECT_PROP_VALUE = 0x9803, 66 67 /* response codes */ 68 RES_OK = 0x2001, 69 RES_GENERAL_ERROR = 0x2002, 70 RES_SESSION_NOT_OPEN = 0x2003, 71 RES_INVALID_TRANSACTION_ID = 0x2004, 72 RES_OPERATION_NOT_SUPPORTED = 0x2005, 73 RES_PARAMETER_NOT_SUPPORTED = 0x2006, 74 RES_INCOMPLETE_TRANSFER = 0x2007, 75 RES_INVALID_STORAGE_ID = 0x2008, 76 RES_INVALID_OBJECT_HANDLE = 0x2009, 77 RES_INVALID_OBJECT_FORMAT_CODE = 0x200b, 78 RES_STORE_FULL = 0x200c, 79 RES_STORE_READ_ONLY = 0x200e, 80 RES_PARTIAL_DELETE = 0x2012, 81 RES_STORE_NOT_AVAILABLE = 0x2013, 82 RES_SPEC_BY_FORMAT_UNSUPPORTED = 0x2014, 83 RES_INVALID_OBJECTINFO = 0x2015, 84 RES_DESTINATION_UNSUPPORTED = 0x2020, 85 RES_INVALID_PARENT_OBJECT = 0x201a, 86 RES_INVALID_PARAMETER = 0x201d, 87 RES_SESSION_ALREADY_OPEN = 0x201e, 88 RES_INVALID_OBJECT_PROP_CODE = 0xA801, 89 90 /* format codes */ 91 FMT_UNDEFINED_OBJECT = 0x3000, 92 FMT_ASSOCIATION = 0x3001, 93 94 /* event codes */ 95 EVT_CANCEL_TRANSACTION = 0x4001, 96 EVT_OBJ_ADDED = 0x4002, 97 EVT_OBJ_REMOVED = 0x4003, 98 EVT_OBJ_INFO_CHANGED = 0x4007, 99 100 /* object properties */ 101 PROP_STORAGE_ID = 0xDC01, 102 PROP_OBJECT_FORMAT = 0xDC02, 103 PROP_OBJECT_COMPRESSED_SIZE = 0xDC04, 104 PROP_PARENT_OBJECT = 0xDC0B, 105 PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER = 0xDC41, 106 PROP_NAME = 0xDC44, 107 }; 108 109 enum mtp_data_type { 110 DATA_TYPE_UINT16 = 0x0004, 111 DATA_TYPE_UINT32 = 0x0006, 112 DATA_TYPE_UINT64 = 0x0008, 113 DATA_TYPE_UINT128 = 0x000a, 114 DATA_TYPE_STRING = 0xffff, 115 }; 116 117 typedef struct { 118 uint32_t length; 119 uint16_t type; 120 uint16_t code; 121 uint32_t trans; 122 } QEMU_PACKED mtp_container; 123 124 /* ----------------------------------------------------------------------- */ 125 126 typedef struct MTPState MTPState; 127 typedef struct MTPControl MTPControl; 128 typedef struct MTPData MTPData; 129 typedef struct MTPObject MTPObject; 130 131 enum { 132 EP_DATA_IN = 1, 133 EP_DATA_OUT, 134 EP_EVENT, 135 }; 136 137 typedef struct MTPMonEntry MTPMonEntry; 138 139 struct MTPMonEntry { 140 uint32_t event; 141 uint32_t handle; 142 143 QTAILQ_ENTRY(MTPMonEntry) next; 144 }; 145 146 struct MTPControl { 147 uint16_t code; 148 uint32_t trans; 149 int argc; 150 uint32_t argv[5]; 151 }; 152 153 struct MTPData { 154 uint16_t code; 155 uint32_t trans; 156 uint64_t offset; 157 uint64_t length; 158 uint64_t alloc; 159 uint8_t *data; 160 bool first; 161 /* Used for >4G file sizes */ 162 bool pending; 163 int fd; 164 uint8_t write_status; 165 /* Internal pointer per every MTP_WRITE_BUF_SZ */ 166 uint64_t data_offset; 167 }; 168 169 struct MTPObject { 170 uint32_t handle; 171 uint16_t format; 172 char *name; 173 char *path; 174 struct stat stat; 175 /* file monitor watch id */ 176 int64_t watchid; 177 MTPObject *parent; 178 uint32_t nchildren; 179 QLIST_HEAD(, MTPObject) children; 180 QLIST_ENTRY(MTPObject) list; 181 bool have_children; 182 QTAILQ_ENTRY(MTPObject) next; 183 }; 184 185 struct MTPState { 186 USBDevice dev; 187 char *root; 188 char *desc; 189 uint32_t flags; 190 191 MTPData *data_in; 192 MTPData *data_out; 193 MTPControl *result; 194 uint32_t session; 195 uint32_t next_handle; 196 bool readonly; 197 198 QTAILQ_HEAD(, MTPObject) objects; 199 QFileMonitor *file_monitor; 200 QTAILQ_HEAD(, MTPMonEntry) events; 201 /* Responder is expecting a write operation */ 202 bool write_pending; 203 struct { 204 uint32_t parent_handle; 205 uint16_t format; 206 uint32_t size; 207 char *filename; 208 } dataset; 209 }; 210 211 /* 212 * ObjectInfo dataset received from initiator 213 * Fields we don't care about are ignored 214 */ 215 typedef struct { 216 uint32_t storage_id; /*unused*/ 217 uint16_t format; 218 uint16_t protection_status; /*unused*/ 219 uint32_t size; 220 uint16_t thumb_format; /*unused*/ 221 uint32_t thumb_comp_sz; /*unused*/ 222 uint32_t thumb_pix_width; /*unused*/ 223 uint32_t thumb_pix_height; /*unused*/ 224 uint32_t image_pix_width; /*unused*/ 225 uint32_t image_pix_height; /*unused*/ 226 uint32_t image_bit_depth; /*unused*/ 227 uint32_t parent; /*unused*/ 228 uint16_t assoc_type; 229 uint32_t assoc_desc; 230 uint32_t seq_no; /*unused*/ 231 uint8_t length; /*part of filename field*/ 232 uint8_t filename[0]; /* UTF-16 encoded */ 233 char date_created[0]; /*unused*/ 234 char date_modified[0]; /*unused*/ 235 char keywords[0]; /*unused*/ 236 /* string and other data follows */ 237 } QEMU_PACKED ObjectInfo; 238 239 #define TYPE_USB_MTP "usb-mtp" 240 #define USB_MTP(obj) OBJECT_CHECK(MTPState, (obj), TYPE_USB_MTP) 241 242 #define QEMU_STORAGE_ID 0x00010001 243 244 #define MTP_FLAG_WRITABLE 0 245 246 #define FLAG_SET(_mtp, _flag) ((_mtp)->flags & (1 << (_flag))) 247 248 /* ----------------------------------------------------------------------- */ 249 250 #define MTP_MANUFACTURER "QEMU" 251 #define MTP_PRODUCT "QEMU filesharing" 252 #define MTP_WRITE_BUF_SZ (512 * KiB) 253 254 enum { 255 STR_MANUFACTURER = 1, 256 STR_PRODUCT, 257 STR_SERIALNUMBER, 258 STR_MTP, 259 STR_CONFIG_FULL, 260 STR_CONFIG_HIGH, 261 STR_CONFIG_SUPER, 262 }; 263 264 static const USBDescStrings desc_strings = { 265 [STR_MANUFACTURER] = MTP_MANUFACTURER, 266 [STR_PRODUCT] = MTP_PRODUCT, 267 [STR_SERIALNUMBER] = "34617", 268 [STR_MTP] = "MTP", 269 [STR_CONFIG_FULL] = "Full speed config (usb 1.1)", 270 [STR_CONFIG_HIGH] = "High speed config (usb 2.0)", 271 [STR_CONFIG_SUPER] = "Super speed config (usb 3.0)", 272 }; 273 274 static const USBDescIface desc_iface_full = { 275 .bInterfaceNumber = 0, 276 .bNumEndpoints = 3, 277 .bInterfaceClass = USB_CLASS_STILL_IMAGE, 278 .bInterfaceSubClass = 0x01, 279 .bInterfaceProtocol = 0x01, 280 .iInterface = STR_MTP, 281 .eps = (USBDescEndpoint[]) { 282 { 283 .bEndpointAddress = USB_DIR_IN | EP_DATA_IN, 284 .bmAttributes = USB_ENDPOINT_XFER_BULK, 285 .wMaxPacketSize = 64, 286 },{ 287 .bEndpointAddress = USB_DIR_OUT | EP_DATA_OUT, 288 .bmAttributes = USB_ENDPOINT_XFER_BULK, 289 .wMaxPacketSize = 64, 290 },{ 291 .bEndpointAddress = USB_DIR_IN | EP_EVENT, 292 .bmAttributes = USB_ENDPOINT_XFER_INT, 293 .wMaxPacketSize = 64, 294 .bInterval = 0x0a, 295 }, 296 } 297 }; 298 299 static const USBDescDevice desc_device_full = { 300 .bcdUSB = 0x0200, 301 .bMaxPacketSize0 = 8, 302 .bNumConfigurations = 1, 303 .confs = (USBDescConfig[]) { 304 { 305 .bNumInterfaces = 1, 306 .bConfigurationValue = 1, 307 .iConfiguration = STR_CONFIG_FULL, 308 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP, 309 .bMaxPower = 2, 310 .nif = 1, 311 .ifs = &desc_iface_full, 312 }, 313 }, 314 }; 315 316 static const USBDescIface desc_iface_high = { 317 .bInterfaceNumber = 0, 318 .bNumEndpoints = 3, 319 .bInterfaceClass = USB_CLASS_STILL_IMAGE, 320 .bInterfaceSubClass = 0x01, 321 .bInterfaceProtocol = 0x01, 322 .iInterface = STR_MTP, 323 .eps = (USBDescEndpoint[]) { 324 { 325 .bEndpointAddress = USB_DIR_IN | EP_DATA_IN, 326 .bmAttributes = USB_ENDPOINT_XFER_BULK, 327 .wMaxPacketSize = 512, 328 },{ 329 .bEndpointAddress = USB_DIR_OUT | EP_DATA_OUT, 330 .bmAttributes = USB_ENDPOINT_XFER_BULK, 331 .wMaxPacketSize = 512, 332 },{ 333 .bEndpointAddress = USB_DIR_IN | EP_EVENT, 334 .bmAttributes = USB_ENDPOINT_XFER_INT, 335 .wMaxPacketSize = 64, 336 .bInterval = 0x0a, 337 }, 338 } 339 }; 340 341 static const USBDescDevice desc_device_high = { 342 .bcdUSB = 0x0200, 343 .bMaxPacketSize0 = 64, 344 .bNumConfigurations = 1, 345 .confs = (USBDescConfig[]) { 346 { 347 .bNumInterfaces = 1, 348 .bConfigurationValue = 1, 349 .iConfiguration = STR_CONFIG_HIGH, 350 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP, 351 .bMaxPower = 2, 352 .nif = 1, 353 .ifs = &desc_iface_high, 354 }, 355 }, 356 }; 357 358 static const USBDescMSOS desc_msos = { 359 .CompatibleID = "MTP", 360 .SelectiveSuspendEnabled = true, 361 }; 362 363 static const USBDesc desc = { 364 .id = { 365 .idVendor = 0x46f4, /* CRC16() of "QEMU" */ 366 .idProduct = 0x0004, 367 .bcdDevice = 0, 368 .iManufacturer = STR_MANUFACTURER, 369 .iProduct = STR_PRODUCT, 370 .iSerialNumber = STR_SERIALNUMBER, 371 }, 372 .full = &desc_device_full, 373 .high = &desc_device_high, 374 .str = desc_strings, 375 .msos = &desc_msos, 376 }; 377 378 /* ----------------------------------------------------------------------- */ 379 380 static MTPObject *usb_mtp_object_alloc(MTPState *s, uint32_t handle, 381 MTPObject *parent, const char *name) 382 { 383 MTPObject *o = g_new0(MTPObject, 1); 384 385 if (name[0] == '.') { 386 goto ignore; 387 } 388 389 o->watchid = -1; 390 o->handle = handle; 391 o->parent = parent; 392 o->name = g_strdup(name); 393 if (parent == NULL) { 394 o->path = g_strdup(name); 395 } else { 396 o->path = g_strdup_printf("%s/%s", parent->path, name); 397 } 398 399 if (lstat(o->path, &o->stat) != 0) { 400 goto ignore; 401 } 402 if (S_ISREG(o->stat.st_mode)) { 403 o->format = FMT_UNDEFINED_OBJECT; 404 } else if (S_ISDIR(o->stat.st_mode)) { 405 o->format = FMT_ASSOCIATION; 406 } else { 407 goto ignore; 408 } 409 410 if (access(o->path, R_OK) != 0) { 411 goto ignore; 412 } 413 414 trace_usb_mtp_object_alloc(s->dev.addr, o->handle, o->path); 415 416 QTAILQ_INSERT_TAIL(&s->objects, o, next); 417 return o; 418 419 ignore: 420 g_free(o->name); 421 g_free(o->path); 422 g_free(o); 423 return NULL; 424 } 425 426 static void usb_mtp_object_free(MTPState *s, MTPObject *o) 427 { 428 MTPObject *iter; 429 430 if (!o) { 431 return; 432 } 433 434 trace_usb_mtp_object_free(s->dev.addr, o->handle, o->path); 435 436 if (o->watchid != -1 && s->file_monitor) { 437 qemu_file_monitor_remove_watch(s->file_monitor, o->path, o->watchid); 438 } 439 440 QTAILQ_REMOVE(&s->objects, o, next); 441 if (o->parent) { 442 QLIST_REMOVE(o, list); 443 o->parent->nchildren--; 444 } 445 446 while (!QLIST_EMPTY(&o->children)) { 447 iter = QLIST_FIRST(&o->children); 448 usb_mtp_object_free(s, iter); 449 } 450 g_free(o->name); 451 g_free(o->path); 452 g_free(o); 453 } 454 455 static MTPObject *usb_mtp_object_lookup(MTPState *s, uint32_t handle) 456 { 457 MTPObject *o; 458 459 QTAILQ_FOREACH(o, &s->objects, next) { 460 if (o->handle == handle) { 461 return o; 462 } 463 } 464 return NULL; 465 } 466 467 static MTPObject *usb_mtp_add_child(MTPState *s, MTPObject *o, 468 const char *name) 469 { 470 MTPObject *child = 471 usb_mtp_object_alloc(s, s->next_handle++, o, name); 472 473 if (child) { 474 trace_usb_mtp_add_child(s->dev.addr, child->handle, child->path); 475 QLIST_INSERT_HEAD(&o->children, child, list); 476 o->nchildren++; 477 478 if (child->format == FMT_ASSOCIATION) { 479 QLIST_INIT(&child->children); 480 } 481 } 482 483 return child; 484 } 485 486 static MTPObject *usb_mtp_object_lookup_name(MTPObject *parent, 487 const char *name, int len) 488 { 489 MTPObject *iter; 490 491 if (len == -1) { 492 len = strlen(name); 493 } 494 495 QLIST_FOREACH(iter, &parent->children, list) { 496 if (strncmp(iter->name, name, len) == 0) { 497 return iter; 498 } 499 } 500 501 return NULL; 502 } 503 504 static MTPObject *usb_mtp_object_lookup_id(MTPState *s, int64_t id) 505 { 506 MTPObject *iter; 507 508 QTAILQ_FOREACH(iter, &s->objects, next) { 509 if (iter->watchid == id) { 510 return iter; 511 } 512 } 513 514 return NULL; 515 } 516 517 static void file_monitor_event(int64_t id, 518 QFileMonitorEvent ev, 519 const char *name, 520 void *opaque) 521 { 522 MTPState *s = opaque; 523 MTPObject *parent = usb_mtp_object_lookup_id(s, id); 524 MTPMonEntry *entry = NULL; 525 MTPObject *o; 526 527 if (!parent) { 528 return; 529 } 530 531 switch (ev) { 532 case QFILE_MONITOR_EVENT_CREATED: 533 if (usb_mtp_object_lookup_name(parent, name, -1)) { 534 /* Duplicate create event */ 535 return; 536 } 537 entry = g_new0(MTPMonEntry, 1); 538 entry->handle = s->next_handle; 539 entry->event = EVT_OBJ_ADDED; 540 o = usb_mtp_add_child(s, parent, name); 541 if (!o) { 542 g_free(entry); 543 return; 544 } 545 trace_usb_mtp_file_monitor_event(s->dev.addr, name, "Obj Added"); 546 break; 547 548 case QFILE_MONITOR_EVENT_DELETED: 549 /* 550 * The kernel issues a IN_IGNORED event 551 * when a dir containing a watchpoint is 552 * deleted, so we don't have to delete the 553 * watchpoint 554 */ 555 o = usb_mtp_object_lookup_name(parent, name, -1); 556 if (!o) { 557 return; 558 } 559 entry = g_new0(MTPMonEntry, 1); 560 entry->handle = o->handle; 561 entry->event = EVT_OBJ_REMOVED; 562 trace_usb_mtp_file_monitor_event(s->dev.addr, o->path, "Obj Deleted"); 563 usb_mtp_object_free(s, o); 564 break; 565 566 case QFILE_MONITOR_EVENT_MODIFIED: 567 o = usb_mtp_object_lookup_name(parent, name, -1); 568 if (!o) { 569 return; 570 } 571 entry = g_new0(MTPMonEntry, 1); 572 entry->handle = o->handle; 573 entry->event = EVT_OBJ_INFO_CHANGED; 574 trace_usb_mtp_file_monitor_event(s->dev.addr, o->path, "Obj Modified"); 575 break; 576 577 case QFILE_MONITOR_EVENT_IGNORED: 578 trace_usb_mtp_file_monitor_event(s->dev.addr, parent->path, 579 "Obj parent dir ignored"); 580 break; 581 582 case QFILE_MONITOR_EVENT_ATTRIBUTES: 583 break; 584 585 default: 586 g_assert_not_reached(); 587 } 588 589 if (entry) { 590 QTAILQ_INSERT_HEAD(&s->events, entry, next); 591 } 592 } 593 594 static void usb_mtp_file_monitor_cleanup(MTPState *s) 595 { 596 MTPMonEntry *e, *p; 597 598 QTAILQ_FOREACH_SAFE(e, &s->events, next, p) { 599 QTAILQ_REMOVE(&s->events, e, next); 600 g_free(e); 601 } 602 603 qemu_file_monitor_free(s->file_monitor); 604 s->file_monitor = NULL; 605 } 606 607 608 static void usb_mtp_object_readdir(MTPState *s, MTPObject *o) 609 { 610 struct dirent *entry; 611 DIR *dir; 612 int fd; 613 Error *err = NULL; 614 615 if (o->have_children) { 616 return; 617 } 618 o->have_children = true; 619 620 fd = open(o->path, O_DIRECTORY | O_CLOEXEC | O_NOFOLLOW); 621 if (fd < 0) { 622 return; 623 } 624 dir = fdopendir(fd); 625 if (!dir) { 626 close(fd); 627 return; 628 } 629 630 if (s->file_monitor) { 631 int64_t id = qemu_file_monitor_add_watch(s->file_monitor, o->path, NULL, 632 file_monitor_event, s, &err); 633 if (id == -1) { 634 error_reportf_err(err, 635 "usb-mtp: failed to add watch for %s: ", 636 o->path); 637 } else { 638 trace_usb_mtp_file_monitor_event(s->dev.addr, o->path, 639 "Watch Added"); 640 o->watchid = id; 641 } 642 } 643 644 while ((entry = readdir(dir)) != NULL) { 645 usb_mtp_add_child(s, o, entry->d_name); 646 } 647 closedir(dir); 648 } 649 650 /* ----------------------------------------------------------------------- */ 651 652 static MTPData *usb_mtp_data_alloc(MTPControl *c) 653 { 654 MTPData *data = g_new0(MTPData, 1); 655 656 data->code = c->code; 657 data->trans = c->trans; 658 data->fd = -1; 659 data->first = true; 660 return data; 661 } 662 663 static void usb_mtp_data_free(MTPData *data) 664 { 665 if (data == NULL) { 666 return; 667 } 668 if (data->fd != -1) { 669 close(data->fd); 670 } 671 g_free(data->data); 672 g_free(data); 673 } 674 675 static void usb_mtp_realloc(MTPData *data, uint32_t bytes) 676 { 677 if (data->length + bytes <= data->alloc) { 678 return; 679 } 680 data->alloc = (data->length + bytes + 0xff) & ~0xff; 681 data->data = g_realloc(data->data, data->alloc); 682 } 683 684 static void usb_mtp_add_u8(MTPData *data, uint8_t val) 685 { 686 usb_mtp_realloc(data, 1); 687 data->data[data->length++] = val; 688 } 689 690 static void usb_mtp_add_u16(MTPData *data, uint16_t val) 691 { 692 usb_mtp_realloc(data, 2); 693 data->data[data->length++] = (val >> 0) & 0xff; 694 data->data[data->length++] = (val >> 8) & 0xff; 695 } 696 697 static void usb_mtp_add_u32(MTPData *data, uint32_t val) 698 { 699 usb_mtp_realloc(data, 4); 700 data->data[data->length++] = (val >> 0) & 0xff; 701 data->data[data->length++] = (val >> 8) & 0xff; 702 data->data[data->length++] = (val >> 16) & 0xff; 703 data->data[data->length++] = (val >> 24) & 0xff; 704 } 705 706 static void usb_mtp_add_u64(MTPData *data, uint64_t val) 707 { 708 usb_mtp_realloc(data, 8); 709 data->data[data->length++] = (val >> 0) & 0xff; 710 data->data[data->length++] = (val >> 8) & 0xff; 711 data->data[data->length++] = (val >> 16) & 0xff; 712 data->data[data->length++] = (val >> 24) & 0xff; 713 data->data[data->length++] = (val >> 32) & 0xff; 714 data->data[data->length++] = (val >> 40) & 0xff; 715 data->data[data->length++] = (val >> 48) & 0xff; 716 data->data[data->length++] = (val >> 56) & 0xff; 717 } 718 719 static void usb_mtp_add_u16_array(MTPData *data, uint32_t len, 720 const uint16_t *vals) 721 { 722 int i; 723 724 usb_mtp_add_u32(data, len); 725 for (i = 0; i < len; i++) { 726 usb_mtp_add_u16(data, vals[i]); 727 } 728 } 729 730 static void usb_mtp_add_u32_array(MTPData *data, uint32_t len, 731 const uint32_t *vals) 732 { 733 int i; 734 735 usb_mtp_add_u32(data, len); 736 for (i = 0; i < len; i++) { 737 usb_mtp_add_u32(data, vals[i]); 738 } 739 } 740 741 static void usb_mtp_add_wstr(MTPData *data, const wchar_t *str) 742 { 743 uint32_t len = wcslen(str); 744 int i; 745 746 if (len > 0) { 747 len++; /* include terminating L'\0' */ 748 } 749 750 usb_mtp_add_u8(data, len); 751 for (i = 0; i < len; i++) { 752 usb_mtp_add_u16(data, str[i]); 753 } 754 } 755 756 static void usb_mtp_add_str(MTPData *data, const char *str) 757 { 758 uint32_t len = strlen(str)+1; 759 wchar_t *wstr = g_new(wchar_t, len); 760 size_t ret; 761 762 ret = mbstowcs(wstr, str, len); 763 if (ret == -1) { 764 usb_mtp_add_wstr(data, L"Oops"); 765 } else { 766 usb_mtp_add_wstr(data, wstr); 767 } 768 769 g_free(wstr); 770 } 771 772 static void usb_mtp_add_time(MTPData *data, time_t time) 773 { 774 char buf[16]; 775 struct tm tm; 776 777 gmtime_r(&time, &tm); 778 strftime(buf, sizeof(buf), "%Y%m%dT%H%M%S", &tm); 779 usb_mtp_add_str(data, buf); 780 } 781 782 /* ----------------------------------------------------------------------- */ 783 784 static void usb_mtp_queue_result(MTPState *s, uint16_t code, uint32_t trans, 785 int argc, uint32_t arg0, uint32_t arg1, 786 uint32_t arg2) 787 { 788 MTPControl *c = g_new0(MTPControl, 1); 789 790 c->code = code; 791 c->trans = trans; 792 c->argc = argc; 793 if (argc > 0) { 794 c->argv[0] = arg0; 795 } 796 if (argc > 1) { 797 c->argv[1] = arg1; 798 } 799 if (argc > 2) { 800 c->argv[2] = arg2; 801 } 802 803 assert(s->result == NULL); 804 s->result = c; 805 } 806 807 /* ----------------------------------------------------------------------- */ 808 809 static MTPData *usb_mtp_get_device_info(MTPState *s, MTPControl *c) 810 { 811 static const uint16_t ops[] = { 812 CMD_GET_DEVICE_INFO, 813 CMD_OPEN_SESSION, 814 CMD_CLOSE_SESSION, 815 CMD_GET_STORAGE_IDS, 816 CMD_GET_STORAGE_INFO, 817 CMD_GET_NUM_OBJECTS, 818 CMD_GET_OBJECT_HANDLES, 819 CMD_GET_OBJECT_INFO, 820 CMD_DELETE_OBJECT, 821 CMD_SEND_OBJECT_INFO, 822 CMD_SEND_OBJECT, 823 CMD_GET_OBJECT, 824 CMD_GET_PARTIAL_OBJECT, 825 CMD_GET_OBJECT_PROPS_SUPPORTED, 826 CMD_GET_OBJECT_PROP_DESC, 827 CMD_GET_OBJECT_PROP_VALUE, 828 }; 829 static const uint16_t fmt[] = { 830 FMT_UNDEFINED_OBJECT, 831 FMT_ASSOCIATION, 832 }; 833 MTPData *d = usb_mtp_data_alloc(c); 834 835 trace_usb_mtp_op_get_device_info(s->dev.addr); 836 837 usb_mtp_add_u16(d, 100); 838 usb_mtp_add_u32(d, 0x00000006); 839 usb_mtp_add_u16(d, 0x0064); 840 usb_mtp_add_wstr(d, L""); 841 usb_mtp_add_u16(d, 0x0000); 842 843 usb_mtp_add_u16_array(d, ARRAY_SIZE(ops), ops); 844 usb_mtp_add_u16_array(d, 0, NULL); 845 usb_mtp_add_u16_array(d, 0, NULL); 846 usb_mtp_add_u16_array(d, 0, NULL); 847 usb_mtp_add_u16_array(d, ARRAY_SIZE(fmt), fmt); 848 849 usb_mtp_add_wstr(d, L"" MTP_MANUFACTURER); 850 usb_mtp_add_wstr(d, L"" MTP_PRODUCT); 851 usb_mtp_add_wstr(d, L"0.1"); 852 usb_mtp_add_wstr(d, L"0123456789abcdef0123456789abcdef"); 853 854 return d; 855 } 856 857 static MTPData *usb_mtp_get_storage_ids(MTPState *s, MTPControl *c) 858 { 859 static const uint32_t ids[] = { 860 QEMU_STORAGE_ID, 861 }; 862 MTPData *d = usb_mtp_data_alloc(c); 863 864 trace_usb_mtp_op_get_storage_ids(s->dev.addr); 865 866 usb_mtp_add_u32_array(d, ARRAY_SIZE(ids), ids); 867 868 return d; 869 } 870 871 static MTPData *usb_mtp_get_storage_info(MTPState *s, MTPControl *c) 872 { 873 MTPData *d = usb_mtp_data_alloc(c); 874 struct statvfs buf; 875 int rc; 876 877 trace_usb_mtp_op_get_storage_info(s->dev.addr); 878 879 if (FLAG_SET(s, MTP_FLAG_WRITABLE)) { 880 usb_mtp_add_u16(d, 0x0003); 881 usb_mtp_add_u16(d, 0x0002); 882 usb_mtp_add_u16(d, 0x0000); 883 } else { 884 usb_mtp_add_u16(d, 0x0001); 885 usb_mtp_add_u16(d, 0x0002); 886 usb_mtp_add_u16(d, 0x0001); 887 } 888 889 rc = statvfs(s->root, &buf); 890 if (rc == 0) { 891 usb_mtp_add_u64(d, (uint64_t)buf.f_frsize * buf.f_blocks); 892 usb_mtp_add_u64(d, (uint64_t)buf.f_bavail * buf.f_blocks); 893 usb_mtp_add_u32(d, buf.f_ffree); 894 } else { 895 usb_mtp_add_u64(d, 0xffffffff); 896 usb_mtp_add_u64(d, 0xffffffff); 897 usb_mtp_add_u32(d, 0xffffffff); 898 } 899 900 usb_mtp_add_str(d, s->desc); 901 usb_mtp_add_wstr(d, L"123456789abcdef"); 902 return d; 903 } 904 905 static MTPData *usb_mtp_get_object_handles(MTPState *s, MTPControl *c, 906 MTPObject *o) 907 { 908 MTPData *d = usb_mtp_data_alloc(c); 909 uint32_t i = 0, handles[o->nchildren]; 910 MTPObject *iter; 911 912 trace_usb_mtp_op_get_object_handles(s->dev.addr, o->handle, o->path); 913 914 QLIST_FOREACH(iter, &o->children, list) { 915 handles[i++] = iter->handle; 916 } 917 assert(i == o->nchildren); 918 usb_mtp_add_u32_array(d, o->nchildren, handles); 919 920 return d; 921 } 922 923 static MTPData *usb_mtp_get_object_info(MTPState *s, MTPControl *c, 924 MTPObject *o) 925 { 926 MTPData *d = usb_mtp_data_alloc(c); 927 928 trace_usb_mtp_op_get_object_info(s->dev.addr, o->handle, o->path); 929 930 usb_mtp_add_u32(d, QEMU_STORAGE_ID); 931 usb_mtp_add_u16(d, o->format); 932 usb_mtp_add_u16(d, 0); 933 934 if (o->stat.st_size > 0xFFFFFFFF) { 935 usb_mtp_add_u32(d, 0xFFFFFFFF); 936 } else { 937 usb_mtp_add_u32(d, o->stat.st_size); 938 } 939 940 usb_mtp_add_u16(d, 0); 941 usb_mtp_add_u32(d, 0); 942 usb_mtp_add_u32(d, 0); 943 usb_mtp_add_u32(d, 0); 944 usb_mtp_add_u32(d, 0); 945 usb_mtp_add_u32(d, 0); 946 usb_mtp_add_u32(d, 0); 947 948 if (o->parent) { 949 usb_mtp_add_u32(d, o->parent->handle); 950 } else { 951 usb_mtp_add_u32(d, 0); 952 } 953 if (o->format == FMT_ASSOCIATION) { 954 usb_mtp_add_u16(d, 0x0001); 955 usb_mtp_add_u32(d, 0x00000001); 956 usb_mtp_add_u32(d, 0); 957 } else { 958 usb_mtp_add_u16(d, 0); 959 usb_mtp_add_u32(d, 0); 960 usb_mtp_add_u32(d, 0); 961 } 962 963 usb_mtp_add_str(d, o->name); 964 usb_mtp_add_time(d, o->stat.st_ctime); 965 usb_mtp_add_time(d, o->stat.st_mtime); 966 usb_mtp_add_wstr(d, L""); 967 968 return d; 969 } 970 971 static MTPData *usb_mtp_get_object(MTPState *s, MTPControl *c, 972 MTPObject *o) 973 { 974 MTPData *d = usb_mtp_data_alloc(c); 975 976 trace_usb_mtp_op_get_object(s->dev.addr, o->handle, o->path); 977 978 d->fd = open(o->path, O_RDONLY | O_CLOEXEC | O_NOFOLLOW); 979 if (d->fd == -1) { 980 usb_mtp_data_free(d); 981 return NULL; 982 } 983 d->length = o->stat.st_size; 984 d->alloc = 512; 985 d->data = g_malloc(d->alloc); 986 return d; 987 } 988 989 static MTPData *usb_mtp_get_partial_object(MTPState *s, MTPControl *c, 990 MTPObject *o) 991 { 992 MTPData *d; 993 off_t offset; 994 995 if (c->argc <= 2) { 996 return NULL; 997 } 998 trace_usb_mtp_op_get_partial_object(s->dev.addr, o->handle, o->path, 999 c->argv[1], c->argv[2]); 1000 1001 d = usb_mtp_data_alloc(c); 1002 d->fd = open(o->path, O_RDONLY | O_CLOEXEC | O_NOFOLLOW); 1003 if (d->fd == -1) { 1004 usb_mtp_data_free(d); 1005 return NULL; 1006 } 1007 1008 offset = c->argv[1]; 1009 if (offset > o->stat.st_size) { 1010 offset = o->stat.st_size; 1011 } 1012 if (lseek(d->fd, offset, SEEK_SET) < 0) { 1013 usb_mtp_data_free(d); 1014 return NULL; 1015 } 1016 1017 d->length = c->argv[2]; 1018 if (d->length > o->stat.st_size - offset) { 1019 d->length = o->stat.st_size - offset; 1020 } 1021 1022 return d; 1023 } 1024 1025 static MTPData *usb_mtp_get_object_props_supported(MTPState *s, MTPControl *c) 1026 { 1027 static const uint16_t props[] = { 1028 PROP_STORAGE_ID, 1029 PROP_OBJECT_FORMAT, 1030 PROP_OBJECT_COMPRESSED_SIZE, 1031 PROP_PARENT_OBJECT, 1032 PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER, 1033 PROP_NAME, 1034 }; 1035 MTPData *d = usb_mtp_data_alloc(c); 1036 usb_mtp_add_u16_array(d, ARRAY_SIZE(props), props); 1037 1038 return d; 1039 } 1040 1041 static MTPData *usb_mtp_get_object_prop_desc(MTPState *s, MTPControl *c) 1042 { 1043 MTPData *d = usb_mtp_data_alloc(c); 1044 switch (c->argv[0]) { 1045 case PROP_STORAGE_ID: 1046 usb_mtp_add_u16(d, PROP_STORAGE_ID); 1047 usb_mtp_add_u16(d, DATA_TYPE_UINT32); 1048 usb_mtp_add_u8(d, 0x00); 1049 usb_mtp_add_u32(d, 0x00000000); 1050 usb_mtp_add_u32(d, 0x00000000); 1051 usb_mtp_add_u8(d, 0x00); 1052 break; 1053 case PROP_OBJECT_FORMAT: 1054 usb_mtp_add_u16(d, PROP_OBJECT_FORMAT); 1055 usb_mtp_add_u16(d, DATA_TYPE_UINT16); 1056 usb_mtp_add_u8(d, 0x00); 1057 usb_mtp_add_u16(d, 0x0000); 1058 usb_mtp_add_u32(d, 0x00000000); 1059 usb_mtp_add_u8(d, 0x00); 1060 break; 1061 case PROP_OBJECT_COMPRESSED_SIZE: 1062 usb_mtp_add_u16(d, PROP_OBJECT_COMPRESSED_SIZE); 1063 usb_mtp_add_u16(d, DATA_TYPE_UINT64); 1064 usb_mtp_add_u8(d, 0x00); 1065 usb_mtp_add_u64(d, 0x0000000000000000); 1066 usb_mtp_add_u32(d, 0x00000000); 1067 usb_mtp_add_u8(d, 0x00); 1068 break; 1069 case PROP_PARENT_OBJECT: 1070 usb_mtp_add_u16(d, PROP_PARENT_OBJECT); 1071 usb_mtp_add_u16(d, DATA_TYPE_UINT32); 1072 usb_mtp_add_u8(d, 0x00); 1073 usb_mtp_add_u32(d, 0x00000000); 1074 usb_mtp_add_u32(d, 0x00000000); 1075 usb_mtp_add_u8(d, 0x00); 1076 break; 1077 case PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER: 1078 usb_mtp_add_u16(d, PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER); 1079 usb_mtp_add_u16(d, DATA_TYPE_UINT128); 1080 usb_mtp_add_u8(d, 0x00); 1081 usb_mtp_add_u64(d, 0x0000000000000000); 1082 usb_mtp_add_u64(d, 0x0000000000000000); 1083 usb_mtp_add_u32(d, 0x00000000); 1084 usb_mtp_add_u8(d, 0x00); 1085 break; 1086 case PROP_NAME: 1087 usb_mtp_add_u16(d, PROP_NAME); 1088 usb_mtp_add_u16(d, DATA_TYPE_STRING); 1089 usb_mtp_add_u8(d, 0x00); 1090 usb_mtp_add_u8(d, 0x00); 1091 usb_mtp_add_u32(d, 0x00000000); 1092 usb_mtp_add_u8(d, 0x00); 1093 break; 1094 default: 1095 usb_mtp_data_free(d); 1096 return NULL; 1097 } 1098 1099 return d; 1100 } 1101 1102 static MTPData *usb_mtp_get_object_prop_value(MTPState *s, MTPControl *c, 1103 MTPObject *o) 1104 { 1105 MTPData *d = usb_mtp_data_alloc(c); 1106 switch (c->argv[1]) { 1107 case PROP_STORAGE_ID: 1108 usb_mtp_add_u32(d, QEMU_STORAGE_ID); 1109 break; 1110 case PROP_OBJECT_FORMAT: 1111 usb_mtp_add_u16(d, o->format); 1112 break; 1113 case PROP_OBJECT_COMPRESSED_SIZE: 1114 usb_mtp_add_u64(d, o->stat.st_size); 1115 break; 1116 case PROP_PARENT_OBJECT: 1117 if (o->parent == NULL) { 1118 usb_mtp_add_u32(d, 0x00000000); 1119 } else { 1120 usb_mtp_add_u32(d, o->parent->handle); 1121 } 1122 break; 1123 case PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER: 1124 /* Should be persistent between sessions, 1125 * but using our objedt ID is "good enough" 1126 * for now */ 1127 usb_mtp_add_u64(d, 0x0000000000000000); 1128 usb_mtp_add_u64(d, o->handle); 1129 break; 1130 case PROP_NAME: 1131 usb_mtp_add_str(d, o->name); 1132 break; 1133 default: 1134 usb_mtp_data_free(d); 1135 return NULL; 1136 } 1137 1138 return d; 1139 } 1140 1141 /* 1142 * Return values when object @o is deleted. 1143 * If at least one of the deletions succeeded, 1144 * DELETE_SUCCESS is set and if at least one 1145 * of the deletions failed, DELETE_FAILURE is 1146 * set. Both bits being set (DELETE_PARTIAL) 1147 * signifies a RES_PARTIAL_DELETE being sent 1148 * back to the initiator. 1149 */ 1150 enum { 1151 DELETE_SUCCESS = (1 << 0), 1152 DELETE_FAILURE = (1 << 1), 1153 DELETE_PARTIAL = (DELETE_FAILURE | DELETE_SUCCESS), 1154 }; 1155 1156 static int usb_mtp_deletefn(MTPState *s, MTPObject *o, uint32_t trans) 1157 { 1158 MTPObject *iter, *iter2; 1159 int ret = 0; 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 ret |= usb_mtp_deletefn(s, iter2, trans); 1169 } 1170 } 1171 } 1172 1173 if (o->format == FMT_UNDEFINED_OBJECT) { 1174 if (remove(o->path)) { 1175 ret |= DELETE_FAILURE; 1176 } else { 1177 usb_mtp_object_free(s, o); 1178 ret |= DELETE_SUCCESS; 1179 } 1180 } else if (o->format == FMT_ASSOCIATION) { 1181 if (rmdir(o->path)) { 1182 ret |= DELETE_FAILURE; 1183 } else { 1184 usb_mtp_object_free(s, o); 1185 ret |= DELETE_SUCCESS; 1186 } 1187 } 1188 1189 return ret; 1190 } 1191 1192 static void usb_mtp_object_delete(MTPState *s, uint32_t handle, 1193 uint32_t format_code, uint32_t trans) 1194 { 1195 MTPObject *o; 1196 int ret; 1197 1198 /* Return error if store is read-only */ 1199 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) { 1200 usb_mtp_queue_result(s, RES_STORE_READ_ONLY, 1201 trans, 0, 0, 0, 0); 1202 return; 1203 } 1204 1205 if (format_code != 0) { 1206 usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED, 1207 trans, 0, 0, 0, 0); 1208 return; 1209 } 1210 1211 if (handle == 0xFFFFFFF) { 1212 o = QTAILQ_FIRST(&s->objects); 1213 } else { 1214 o = usb_mtp_object_lookup(s, handle); 1215 } 1216 if (o == NULL) { 1217 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1218 trans, 0, 0, 0, 0); 1219 return; 1220 } 1221 1222 ret = usb_mtp_deletefn(s, o, trans); 1223 switch (ret) { 1224 case DELETE_SUCCESS: 1225 usb_mtp_queue_result(s, RES_OK, trans, 1226 0, 0, 0, 0); 1227 break; 1228 case DELETE_FAILURE: 1229 usb_mtp_queue_result(s, RES_PARTIAL_DELETE, 1230 trans, 0, 0, 0, 0); 1231 break; 1232 case DELETE_PARTIAL: 1233 usb_mtp_queue_result(s, RES_PARTIAL_DELETE, 1234 trans, 0, 0, 0, 0); 1235 break; 1236 default: 1237 g_assert_not_reached(); 1238 } 1239 1240 return; 1241 } 1242 1243 static void usb_mtp_command(MTPState *s, MTPControl *c) 1244 { 1245 MTPData *data_in = NULL; 1246 MTPObject *o = NULL; 1247 uint32_t nres = 0, res0 = 0; 1248 Error *err = NULL; 1249 1250 /* sanity checks */ 1251 if (c->code >= CMD_CLOSE_SESSION && s->session == 0) { 1252 usb_mtp_queue_result(s, RES_SESSION_NOT_OPEN, 1253 c->trans, 0, 0, 0, 0); 1254 return; 1255 } 1256 1257 /* process commands */ 1258 switch (c->code) { 1259 case CMD_GET_DEVICE_INFO: 1260 data_in = usb_mtp_get_device_info(s, c); 1261 break; 1262 case CMD_OPEN_SESSION: 1263 if (s->session) { 1264 usb_mtp_queue_result(s, RES_SESSION_ALREADY_OPEN, 1265 c->trans, 1, s->session, 0, 0); 1266 return; 1267 } 1268 if (c->argv[0] == 0) { 1269 usb_mtp_queue_result(s, RES_INVALID_PARAMETER, 1270 c->trans, 0, 0, 0, 0); 1271 return; 1272 } 1273 trace_usb_mtp_op_open_session(s->dev.addr); 1274 s->session = c->argv[0]; 1275 usb_mtp_object_alloc(s, s->next_handle++, NULL, s->root); 1276 1277 s->file_monitor = qemu_file_monitor_new(&err); 1278 if (err) { 1279 error_reportf_err(err, 1280 "usb-mtp: file monitoring init failed: "); 1281 } else { 1282 QTAILQ_INIT(&s->events); 1283 } 1284 break; 1285 case CMD_CLOSE_SESSION: 1286 trace_usb_mtp_op_close_session(s->dev.addr); 1287 s->session = 0; 1288 s->next_handle = 0; 1289 usb_mtp_file_monitor_cleanup(s); 1290 usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects)); 1291 assert(QTAILQ_EMPTY(&s->objects)); 1292 break; 1293 case CMD_GET_STORAGE_IDS: 1294 data_in = usb_mtp_get_storage_ids(s, c); 1295 break; 1296 case CMD_GET_STORAGE_INFO: 1297 if (c->argv[0] != QEMU_STORAGE_ID && 1298 c->argv[0] != 0xffffffff) { 1299 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID, 1300 c->trans, 0, 0, 0, 0); 1301 return; 1302 } 1303 data_in = usb_mtp_get_storage_info(s, c); 1304 break; 1305 case CMD_GET_NUM_OBJECTS: 1306 case CMD_GET_OBJECT_HANDLES: 1307 if (c->argv[0] != QEMU_STORAGE_ID && 1308 c->argv[0] != 0xffffffff) { 1309 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID, 1310 c->trans, 0, 0, 0, 0); 1311 return; 1312 } 1313 if (c->argv[1] != 0x00000000) { 1314 usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED, 1315 c->trans, 0, 0, 0, 0); 1316 return; 1317 } 1318 if (c->argv[2] == 0x00000000 || 1319 c->argv[2] == 0xffffffff) { 1320 o = QTAILQ_FIRST(&s->objects); 1321 } else { 1322 o = usb_mtp_object_lookup(s, c->argv[2]); 1323 } 1324 if (o == NULL) { 1325 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1326 c->trans, 0, 0, 0, 0); 1327 return; 1328 } 1329 if (o->format != FMT_ASSOCIATION) { 1330 usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT, 1331 c->trans, 0, 0, 0, 0); 1332 return; 1333 } 1334 usb_mtp_object_readdir(s, o); 1335 if (c->code == CMD_GET_NUM_OBJECTS) { 1336 trace_usb_mtp_op_get_num_objects(s->dev.addr, o->handle, o->path); 1337 nres = 1; 1338 res0 = o->nchildren; 1339 } else { 1340 data_in = usb_mtp_get_object_handles(s, c, o); 1341 } 1342 break; 1343 case CMD_GET_OBJECT_INFO: 1344 o = usb_mtp_object_lookup(s, c->argv[0]); 1345 if (o == NULL) { 1346 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1347 c->trans, 0, 0, 0, 0); 1348 return; 1349 } 1350 data_in = usb_mtp_get_object_info(s, c, o); 1351 break; 1352 case CMD_GET_OBJECT: 1353 o = usb_mtp_object_lookup(s, c->argv[0]); 1354 if (o == NULL) { 1355 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1356 c->trans, 0, 0, 0, 0); 1357 return; 1358 } 1359 if (o->format == FMT_ASSOCIATION) { 1360 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1361 c->trans, 0, 0, 0, 0); 1362 return; 1363 } 1364 data_in = usb_mtp_get_object(s, c, o); 1365 if (data_in == NULL) { 1366 usb_mtp_queue_result(s, RES_GENERAL_ERROR, 1367 c->trans, 0, 0, 0, 0); 1368 return; 1369 } 1370 break; 1371 case CMD_DELETE_OBJECT: 1372 usb_mtp_object_delete(s, c->argv[0], c->argv[1], c->trans); 1373 return; 1374 case CMD_GET_PARTIAL_OBJECT: 1375 o = usb_mtp_object_lookup(s, c->argv[0]); 1376 if (o == NULL) { 1377 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1378 c->trans, 0, 0, 0, 0); 1379 return; 1380 } 1381 if (o->format == FMT_ASSOCIATION) { 1382 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1383 c->trans, 0, 0, 0, 0); 1384 return; 1385 } 1386 data_in = usb_mtp_get_partial_object(s, c, o); 1387 if (data_in == NULL) { 1388 usb_mtp_queue_result(s, RES_GENERAL_ERROR, 1389 c->trans, 0, 0, 0, 0); 1390 return; 1391 } 1392 nres = 1; 1393 res0 = data_in->length; 1394 break; 1395 case CMD_SEND_OBJECT_INFO: 1396 /* Return error if store is read-only */ 1397 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) { 1398 usb_mtp_queue_result(s, RES_STORE_READ_ONLY, 1399 c->trans, 0, 0, 0, 0); 1400 } else if (c->argv[0] && (c->argv[0] != QEMU_STORAGE_ID)) { 1401 /* First parameter points to storage id or is 0 */ 1402 usb_mtp_queue_result(s, RES_STORE_NOT_AVAILABLE, c->trans, 1403 0, 0, 0, 0); 1404 } else if (c->argv[1] && !c->argv[0]) { 1405 /* If second parameter is specified, first must also be specified */ 1406 usb_mtp_queue_result(s, RES_DESTINATION_UNSUPPORTED, c->trans, 1407 0, 0, 0, 0); 1408 } else { 1409 uint32_t handle = c->argv[1]; 1410 if (handle == 0xFFFFFFFF || handle == 0) { 1411 /* root object */ 1412 o = QTAILQ_FIRST(&s->objects); 1413 } else { 1414 o = usb_mtp_object_lookup(s, handle); 1415 } 1416 if (o == NULL) { 1417 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, c->trans, 1418 0, 0, 0, 0); 1419 } else if (o->format != FMT_ASSOCIATION) { 1420 usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT, c->trans, 1421 0, 0, 0, 0); 1422 } 1423 } 1424 if (o) { 1425 s->dataset.parent_handle = o->handle; 1426 } 1427 s->data_out = usb_mtp_data_alloc(c); 1428 return; 1429 case CMD_SEND_OBJECT: 1430 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) { 1431 usb_mtp_queue_result(s, RES_STORE_READ_ONLY, 1432 c->trans, 0, 0, 0, 0); 1433 return; 1434 } 1435 if (!s->write_pending) { 1436 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, 1437 c->trans, 0, 0, 0, 0); 1438 return; 1439 } 1440 s->data_out = usb_mtp_data_alloc(c); 1441 return; 1442 case CMD_GET_OBJECT_PROPS_SUPPORTED: 1443 if (c->argv[0] != FMT_UNDEFINED_OBJECT && 1444 c->argv[0] != FMT_ASSOCIATION) { 1445 usb_mtp_queue_result(s, RES_INVALID_OBJECT_FORMAT_CODE, 1446 c->trans, 0, 0, 0, 0); 1447 return; 1448 } 1449 data_in = usb_mtp_get_object_props_supported(s, c); 1450 break; 1451 case CMD_GET_OBJECT_PROP_DESC: 1452 if (c->argv[1] != FMT_UNDEFINED_OBJECT && 1453 c->argv[1] != FMT_ASSOCIATION) { 1454 usb_mtp_queue_result(s, RES_INVALID_OBJECT_FORMAT_CODE, 1455 c->trans, 0, 0, 0, 0); 1456 return; 1457 } 1458 data_in = usb_mtp_get_object_prop_desc(s, c); 1459 if (data_in == NULL) { 1460 usb_mtp_queue_result(s, RES_INVALID_OBJECT_PROP_CODE, 1461 c->trans, 0, 0, 0, 0); 1462 return; 1463 } 1464 break; 1465 case CMD_GET_OBJECT_PROP_VALUE: 1466 o = usb_mtp_object_lookup(s, c->argv[0]); 1467 if (o == NULL) { 1468 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1469 c->trans, 0, 0, 0, 0); 1470 return; 1471 } 1472 data_in = usb_mtp_get_object_prop_value(s, c, o); 1473 if (data_in == NULL) { 1474 usb_mtp_queue_result(s, RES_INVALID_OBJECT_PROP_CODE, 1475 c->trans, 0, 0, 0, 0); 1476 return; 1477 } 1478 break; 1479 default: 1480 trace_usb_mtp_op_unknown(s->dev.addr, c->code); 1481 usb_mtp_queue_result(s, RES_OPERATION_NOT_SUPPORTED, 1482 c->trans, 0, 0, 0, 0); 1483 return; 1484 } 1485 1486 /* return results on success */ 1487 if (data_in) { 1488 assert(s->data_in == NULL); 1489 s->data_in = data_in; 1490 } 1491 usb_mtp_queue_result(s, RES_OK, c->trans, nres, res0, 0, 0); 1492 } 1493 1494 /* ----------------------------------------------------------------------- */ 1495 1496 static void usb_mtp_handle_reset(USBDevice *dev) 1497 { 1498 MTPState *s = USB_MTP(dev); 1499 1500 trace_usb_mtp_reset(s->dev.addr); 1501 1502 usb_mtp_file_monitor_cleanup(s); 1503 usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects)); 1504 s->session = 0; 1505 usb_mtp_data_free(s->data_in); 1506 s->data_in = NULL; 1507 usb_mtp_data_free(s->data_out); 1508 s->data_out = NULL; 1509 g_free(s->result); 1510 s->result = NULL; 1511 } 1512 1513 static void usb_mtp_handle_control(USBDevice *dev, USBPacket *p, 1514 int request, int value, int index, 1515 int length, uint8_t *data) 1516 { 1517 int ret; 1518 MTPState *s = USB_MTP(dev); 1519 uint16_t *event = (uint16_t *)data; 1520 1521 switch (request) { 1522 case ClassInterfaceOutRequest | 0x64: 1523 if (*event == EVT_CANCEL_TRANSACTION) { 1524 g_free(s->result); 1525 s->result = NULL; 1526 usb_mtp_data_free(s->data_in); 1527 s->data_in = NULL; 1528 if (s->write_pending) { 1529 g_free(s->dataset.filename); 1530 s->write_pending = false; 1531 s->dataset.size = 0; 1532 } 1533 usb_mtp_data_free(s->data_out); 1534 s->data_out = NULL; 1535 } else { 1536 p->status = USB_RET_STALL; 1537 } 1538 break; 1539 default: 1540 ret = usb_desc_handle_control(dev, p, request, 1541 value, index, length, data); 1542 if (ret >= 0) { 1543 return; 1544 } 1545 } 1546 1547 trace_usb_mtp_stall(dev->addr, "unknown control request"); 1548 } 1549 1550 static void usb_mtp_cancel_packet(USBDevice *dev, USBPacket *p) 1551 { 1552 /* we don't use async packets, so this should never be called */ 1553 fprintf(stderr, "%s\n", __func__); 1554 } 1555 1556 static char *utf16_to_str(uint8_t len, uint8_t *str16) 1557 { 1558 wchar_t *wstr = g_new0(wchar_t, len + 1); 1559 int count, dlen; 1560 char *dest; 1561 1562 for (count = 0; count < len; count++) { 1563 /* FIXME: not working for surrogate pairs */ 1564 wstr[count] = lduw_le_p(str16 + (count * 2)); 1565 } 1566 wstr[count] = 0; 1567 1568 dlen = wcstombs(NULL, wstr, 0) + 1; 1569 dest = g_malloc(dlen); 1570 wcstombs(dest, wstr, dlen); 1571 g_free(wstr); 1572 return dest; 1573 } 1574 1575 /* Wrapper around write, returns 0 on failure */ 1576 static uint64_t write_retry(int fd, void *buf, uint64_t size, off_t offset) 1577 { 1578 uint64_t ret = 0; 1579 1580 if (lseek(fd, offset, SEEK_SET) < 0) { 1581 goto done; 1582 } 1583 1584 ret = qemu_write_full(fd, buf, size); 1585 1586 done: 1587 return ret; 1588 } 1589 1590 static int usb_mtp_update_object(MTPObject *parent, char *name) 1591 { 1592 int ret = 0; 1593 1594 MTPObject *o = 1595 usb_mtp_object_lookup_name(parent, name, strlen(name)); 1596 1597 if (o) { 1598 ret = lstat(o->path, &o->stat); 1599 } 1600 1601 return ret; 1602 } 1603 1604 static void usb_mtp_write_data(MTPState *s, uint32_t handle) 1605 { 1606 MTPData *d = s->data_out; 1607 MTPObject *parent = 1608 usb_mtp_object_lookup(s, s->dataset.parent_handle); 1609 char *path = NULL; 1610 uint64_t rc; 1611 mode_t mask = 0644; 1612 int ret = 0; 1613 1614 assert(d != NULL); 1615 1616 switch (d->write_status) { 1617 case WRITE_START: 1618 if (!parent || !s->write_pending) { 1619 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, d->trans, 1620 0, 0, 0, 0); 1621 return; 1622 } 1623 1624 if (s->dataset.filename) { 1625 path = g_strdup_printf("%s/%s", parent->path, s->dataset.filename); 1626 if (s->dataset.format == FMT_ASSOCIATION) { 1627 ret = mkdir(path, mask); 1628 if (!ret) { 1629 usb_mtp_queue_result(s, RES_OK, d->trans, 3, 1630 QEMU_STORAGE_ID, 1631 s->dataset.parent_handle, 1632 handle); 1633 goto close; 1634 } 1635 goto done; 1636 } 1637 1638 d->fd = open(path, O_CREAT | O_WRONLY | 1639 O_CLOEXEC | O_NOFOLLOW, mask); 1640 if (d->fd == -1) { 1641 ret = 1; 1642 goto done; 1643 } 1644 1645 /* Return success if initiator sent 0 sized data */ 1646 if (!s->dataset.size) { 1647 goto done; 1648 } 1649 if (d->length != MTP_WRITE_BUF_SZ && !d->pending) { 1650 d->write_status = WRITE_END; 1651 } 1652 } 1653 /* fall through */ 1654 case WRITE_CONTINUE: 1655 case WRITE_END: 1656 rc = write_retry(d->fd, d->data, d->data_offset, 1657 d->offset - d->data_offset); 1658 if (rc != d->data_offset) { 1659 ret = 1; 1660 goto done; 1661 } 1662 if (d->write_status != WRITE_END) { 1663 g_free(path); 1664 return; 1665 } else { 1666 /* 1667 * Return an incomplete transfer if file size doesn't match 1668 * for < 4G file or if lstat fails which will result in an incorrect 1669 * file size 1670 */ 1671 if ((s->dataset.size != 0xFFFFFFFF && 1672 d->offset != s->dataset.size) || 1673 usb_mtp_update_object(parent, s->dataset.filename)) { 1674 usb_mtp_queue_result(s, RES_INCOMPLETE_TRANSFER, d->trans, 1675 0, 0, 0, 0); 1676 goto close; 1677 } 1678 } 1679 } 1680 1681 done: 1682 if (ret) { 1683 usb_mtp_queue_result(s, RES_STORE_FULL, d->trans, 1684 0, 0, 0, 0); 1685 } else { 1686 usb_mtp_queue_result(s, RES_OK, d->trans, 1687 0, 0, 0, 0); 1688 } 1689 close: 1690 /* 1691 * The write dataset is kept around and freed only 1692 * on success or if another write request comes in 1693 */ 1694 if (d->fd != -1) { 1695 close(d->fd); 1696 d->fd = -1; 1697 } 1698 g_free(s->dataset.filename); 1699 s->dataset.size = 0; 1700 g_free(path); 1701 s->write_pending = false; 1702 } 1703 1704 static void usb_mtp_write_metadata(MTPState *s, uint64_t dlen) 1705 { 1706 MTPData *d = s->data_out; 1707 ObjectInfo *dataset = (ObjectInfo *)d->data; 1708 char *filename; 1709 MTPObject *o; 1710 MTPObject *p = usb_mtp_object_lookup(s, s->dataset.parent_handle); 1711 uint32_t next_handle = s->next_handle; 1712 size_t filename_chars = dlen - offsetof(ObjectInfo, filename); 1713 1714 /* 1715 * filename is utf-16. We're intentionally doing 1716 * integer division to truncate if malicious guest 1717 * sent an odd number of bytes. 1718 */ 1719 filename_chars /= 2; 1720 1721 assert(!s->write_pending); 1722 assert(p != NULL); 1723 1724 filename = utf16_to_str(MIN(dataset->length, filename_chars), 1725 dataset->filename); 1726 1727 if (strchr(filename, '/')) { 1728 usb_mtp_queue_result(s, RES_PARAMETER_NOT_SUPPORTED, d->trans, 1729 0, 0, 0, 0); 1730 g_free(filename); 1731 return; 1732 } 1733 1734 o = usb_mtp_object_lookup_name(p, filename, -1); 1735 if (o != NULL) { 1736 next_handle = o->handle; 1737 } 1738 1739 s->dataset.filename = filename; 1740 s->dataset.format = dataset->format; 1741 s->dataset.size = dataset->size; 1742 s->write_pending = true; 1743 1744 if (s->dataset.format == FMT_ASSOCIATION) { 1745 usb_mtp_write_data(s, next_handle); 1746 } else { 1747 usb_mtp_queue_result(s, RES_OK, d->trans, 3, QEMU_STORAGE_ID, 1748 s->dataset.parent_handle, next_handle); 1749 } 1750 } 1751 1752 static void usb_mtp_get_data(MTPState *s, mtp_container *container, 1753 USBPacket *p) 1754 { 1755 MTPData *d = s->data_out; 1756 uint64_t dlen; 1757 uint32_t data_len = p->iov.size; 1758 uint64_t total_len; 1759 1760 if (!d) { 1761 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, 0, 1762 0, 0, 0, 0); 1763 return; 1764 } 1765 if (d->first) { 1766 /* Total length of incoming data */ 1767 total_len = cpu_to_le32(container->length) - sizeof(mtp_container); 1768 /* Length of data in this packet */ 1769 data_len -= sizeof(mtp_container); 1770 if (total_len < MTP_WRITE_BUF_SZ) { 1771 usb_mtp_realloc(d, total_len); 1772 d->length += total_len; 1773 } else { 1774 usb_mtp_realloc(d, MTP_WRITE_BUF_SZ - sizeof(mtp_container)); 1775 d->length += MTP_WRITE_BUF_SZ - sizeof(mtp_container); 1776 } 1777 d->offset = 0; 1778 d->first = false; 1779 d->pending = false; 1780 d->data_offset = 0; 1781 d->write_status = WRITE_START; 1782 } 1783 1784 if (d->pending) { 1785 memset(d->data, 0, d->length); 1786 if (d->length != MTP_WRITE_BUF_SZ) { 1787 usb_mtp_realloc(d, MTP_WRITE_BUF_SZ - d->length); 1788 d->length += (MTP_WRITE_BUF_SZ - d->length); 1789 } 1790 d->pending = false; 1791 d->write_status = WRITE_CONTINUE; 1792 d->data_offset = 0; 1793 } 1794 1795 if (d->length - d->data_offset > data_len) { 1796 dlen = data_len; 1797 } else { 1798 dlen = d->length - d->data_offset; 1799 } 1800 1801 switch (d->code) { 1802 case CMD_SEND_OBJECT_INFO: 1803 usb_packet_copy(p, d->data + d->data_offset, dlen); 1804 d->offset += dlen; 1805 d->data_offset += dlen; 1806 if (d->data_offset == d->length) { 1807 /* The operation might have already failed */ 1808 if (!s->result) { 1809 usb_mtp_write_metadata(s, dlen); 1810 } 1811 usb_mtp_data_free(s->data_out); 1812 s->data_out = NULL; 1813 return; 1814 } 1815 break; 1816 case CMD_SEND_OBJECT: 1817 usb_packet_copy(p, d->data + d->data_offset, dlen); 1818 d->offset += dlen; 1819 d->data_offset += dlen; 1820 if ((p->iov.size % 64) || !p->iov.size) { 1821 assert((s->dataset.size == 0xFFFFFFFF) || 1822 (s->dataset.size == d->offset)); 1823 1824 if (d->length == MTP_WRITE_BUF_SZ) { 1825 d->write_status = WRITE_END; 1826 } else { 1827 d->write_status = WRITE_START; 1828 } 1829 usb_mtp_write_data(s, 0); 1830 usb_mtp_data_free(s->data_out); 1831 s->data_out = NULL; 1832 return; 1833 } 1834 if (d->data_offset == d->length) { 1835 d->pending = true; 1836 usb_mtp_write_data(s, 0); 1837 } 1838 break; 1839 default: 1840 p->status = USB_RET_STALL; 1841 return; 1842 } 1843 } 1844 1845 static void usb_mtp_handle_data(USBDevice *dev, USBPacket *p) 1846 { 1847 MTPState *s = USB_MTP(dev); 1848 MTPControl cmd; 1849 mtp_container container; 1850 uint32_t params[5]; 1851 uint16_t container_type; 1852 int i, rc; 1853 1854 switch (p->ep->nr) { 1855 case EP_DATA_IN: 1856 if (s->data_out != NULL) { 1857 /* guest bug */ 1858 trace_usb_mtp_stall(s->dev.addr, "awaiting data-out"); 1859 p->status = USB_RET_STALL; 1860 return; 1861 } 1862 if (p->iov.size < sizeof(container)) { 1863 trace_usb_mtp_stall(s->dev.addr, "packet too small"); 1864 p->status = USB_RET_STALL; 1865 return; 1866 } 1867 if (s->data_in != NULL) { 1868 MTPData *d = s->data_in; 1869 uint64_t dlen = d->length - d->offset; 1870 if (d->first) { 1871 trace_usb_mtp_data_in(s->dev.addr, d->trans, d->length); 1872 if (d->length + sizeof(container) > 0xFFFFFFFF) { 1873 container.length = cpu_to_le32(0xFFFFFFFF); 1874 } else { 1875 container.length = 1876 cpu_to_le32(d->length + sizeof(container)); 1877 } 1878 container.type = cpu_to_le16(TYPE_DATA); 1879 container.code = cpu_to_le16(d->code); 1880 container.trans = cpu_to_le32(d->trans); 1881 usb_packet_copy(p, &container, sizeof(container)); 1882 d->first = false; 1883 if (dlen > p->iov.size - sizeof(container)) { 1884 dlen = p->iov.size - sizeof(container); 1885 } 1886 } else { 1887 if (dlen > p->iov.size) { 1888 dlen = p->iov.size; 1889 } 1890 } 1891 if (d->fd == -1) { 1892 usb_packet_copy(p, d->data + d->offset, dlen); 1893 } else { 1894 if (d->alloc < p->iov.size) { 1895 d->alloc = p->iov.size; 1896 d->data = g_realloc(d->data, d->alloc); 1897 } 1898 rc = read(d->fd, d->data, dlen); 1899 if (rc != dlen) { 1900 memset(d->data, 0, dlen); 1901 s->result->code = RES_INCOMPLETE_TRANSFER; 1902 } 1903 usb_packet_copy(p, d->data, dlen); 1904 } 1905 d->offset += dlen; 1906 if (d->offset == d->length) { 1907 usb_mtp_data_free(s->data_in); 1908 s->data_in = NULL; 1909 } 1910 } else if (s->result != NULL) { 1911 MTPControl *r = s->result; 1912 int length = sizeof(container) + r->argc * sizeof(uint32_t); 1913 if (r->code == RES_OK) { 1914 trace_usb_mtp_success(s->dev.addr, r->trans, 1915 (r->argc > 0) ? r->argv[0] : 0, 1916 (r->argc > 1) ? r->argv[1] : 0); 1917 } else { 1918 trace_usb_mtp_error(s->dev.addr, r->code, r->trans, 1919 (r->argc > 0) ? r->argv[0] : 0, 1920 (r->argc > 1) ? r->argv[1] : 0); 1921 } 1922 container.length = cpu_to_le32(length); 1923 container.type = cpu_to_le16(TYPE_RESPONSE); 1924 container.code = cpu_to_le16(r->code); 1925 container.trans = cpu_to_le32(r->trans); 1926 for (i = 0; i < r->argc; i++) { 1927 params[i] = cpu_to_le32(r->argv[i]); 1928 } 1929 usb_packet_copy(p, &container, sizeof(container)); 1930 usb_packet_copy(p, ¶ms, length - sizeof(container)); 1931 g_free(s->result); 1932 s->result = NULL; 1933 } 1934 break; 1935 case EP_DATA_OUT: 1936 if (p->iov.size < sizeof(container)) { 1937 trace_usb_mtp_stall(s->dev.addr, "packet too small"); 1938 p->status = USB_RET_STALL; 1939 return; 1940 } 1941 if ((s->data_out != NULL) && !s->data_out->first) { 1942 container_type = TYPE_DATA; 1943 } else { 1944 usb_packet_copy(p, &container, sizeof(container)); 1945 container_type = le16_to_cpu(container.type); 1946 } 1947 switch (container_type) { 1948 case TYPE_COMMAND: 1949 if (s->data_in || s->data_out || s->result) { 1950 trace_usb_mtp_stall(s->dev.addr, "transaction inflight"); 1951 p->status = USB_RET_STALL; 1952 return; 1953 } 1954 cmd.code = le16_to_cpu(container.code); 1955 cmd.argc = (le32_to_cpu(container.length) - sizeof(container)) 1956 / sizeof(uint32_t); 1957 cmd.trans = le32_to_cpu(container.trans); 1958 if (cmd.argc > ARRAY_SIZE(cmd.argv)) { 1959 cmd.argc = ARRAY_SIZE(cmd.argv); 1960 } 1961 if (p->iov.size < sizeof(container) + cmd.argc * sizeof(uint32_t)) { 1962 trace_usb_mtp_stall(s->dev.addr, "packet too small"); 1963 p->status = USB_RET_STALL; 1964 return; 1965 } 1966 usb_packet_copy(p, ¶ms, cmd.argc * sizeof(uint32_t)); 1967 for (i = 0; i < cmd.argc; i++) { 1968 cmd.argv[i] = le32_to_cpu(params[i]); 1969 } 1970 trace_usb_mtp_command(s->dev.addr, cmd.code, cmd.trans, 1971 (cmd.argc > 0) ? cmd.argv[0] : 0, 1972 (cmd.argc > 1) ? cmd.argv[1] : 0, 1973 (cmd.argc > 2) ? cmd.argv[2] : 0, 1974 (cmd.argc > 3) ? cmd.argv[3] : 0, 1975 (cmd.argc > 4) ? cmd.argv[4] : 0); 1976 usb_mtp_command(s, &cmd); 1977 break; 1978 case TYPE_DATA: 1979 /* One of the previous transfers has already errored but the 1980 * responder is still sending data associated with it 1981 */ 1982 if (s->result != NULL) { 1983 return; 1984 } 1985 usb_mtp_get_data(s, &container, p); 1986 break; 1987 default: 1988 /* not needed as long as the mtp device is read-only */ 1989 p->status = USB_RET_STALL; 1990 return; 1991 } 1992 break; 1993 case EP_EVENT: 1994 if (!QTAILQ_EMPTY(&s->events)) { 1995 struct MTPMonEntry *e = QTAILQ_LAST(&s->events); 1996 uint32_t handle; 1997 int len = sizeof(container) + sizeof(uint32_t); 1998 1999 if (p->iov.size < len) { 2000 trace_usb_mtp_stall(s->dev.addr, 2001 "packet too small to send event"); 2002 p->status = USB_RET_STALL; 2003 return; 2004 } 2005 2006 QTAILQ_REMOVE(&s->events, e, next); 2007 container.length = cpu_to_le32(len); 2008 container.type = cpu_to_le32(TYPE_EVENT); 2009 container.code = cpu_to_le16(e->event); 2010 container.trans = 0; /* no trans specific events */ 2011 handle = cpu_to_le32(e->handle); 2012 usb_packet_copy(p, &container, sizeof(container)); 2013 usb_packet_copy(p, &handle, sizeof(uint32_t)); 2014 g_free(e); 2015 return; 2016 } 2017 p->status = USB_RET_NAK; 2018 return; 2019 default: 2020 trace_usb_mtp_stall(s->dev.addr, "invalid endpoint"); 2021 p->status = USB_RET_STALL; 2022 return; 2023 } 2024 2025 if (p->actual_length == 0) { 2026 trace_usb_mtp_nak(s->dev.addr, p->ep->nr); 2027 p->status = USB_RET_NAK; 2028 return; 2029 } else { 2030 trace_usb_mtp_xfer(s->dev.addr, p->ep->nr, p->actual_length, 2031 p->iov.size); 2032 return; 2033 } 2034 } 2035 2036 static void usb_mtp_realize(USBDevice *dev, Error **errp) 2037 { 2038 MTPState *s = USB_MTP(dev); 2039 2040 if ((s->root == NULL) || !g_path_is_absolute(s->root)) { 2041 error_setg(errp, "usb-mtp: rootdir must be configured and be an absolute path"); 2042 return; 2043 } 2044 2045 if (access(s->root, R_OK) != 0) { 2046 error_setg(errp, "usb-mtp: rootdir does not exist/not readable"); 2047 return; 2048 } else if (!s->readonly && access(s->root, W_OK) != 0) { 2049 error_setg(errp, "usb-mtp: rootdir does not have write permissions"); 2050 return; 2051 } 2052 2053 /* Mark store as RW */ 2054 if (!s->readonly) { 2055 s->flags |= (1 << MTP_FLAG_WRITABLE); 2056 } 2057 2058 if (s->desc == NULL) { 2059 /* 2060 * This does not check if path exists 2061 * but we have the checks above 2062 */ 2063 s->desc = g_path_get_basename(s->root); 2064 } 2065 2066 usb_desc_create_serial(dev); 2067 usb_desc_init(dev); 2068 QTAILQ_INIT(&s->objects); 2069 2070 } 2071 2072 static const VMStateDescription vmstate_usb_mtp = { 2073 .name = "usb-mtp", 2074 .unmigratable = 1, 2075 .version_id = 1, 2076 .minimum_version_id = 1, 2077 .fields = (VMStateField[]) { 2078 VMSTATE_USB_DEVICE(dev, MTPState), 2079 VMSTATE_END_OF_LIST() 2080 } 2081 }; 2082 2083 static Property mtp_properties[] = { 2084 DEFINE_PROP_STRING("rootdir", MTPState, root), 2085 DEFINE_PROP_STRING("desc", MTPState, desc), 2086 DEFINE_PROP_BOOL("readonly", MTPState, readonly, true), 2087 DEFINE_PROP_END_OF_LIST(), 2088 }; 2089 2090 static void usb_mtp_class_initfn(ObjectClass *klass, void *data) 2091 { 2092 DeviceClass *dc = DEVICE_CLASS(klass); 2093 USBDeviceClass *uc = USB_DEVICE_CLASS(klass); 2094 2095 uc->realize = usb_mtp_realize; 2096 uc->product_desc = "QEMU USB MTP"; 2097 uc->usb_desc = &desc; 2098 uc->cancel_packet = usb_mtp_cancel_packet; 2099 uc->handle_attach = usb_desc_attach; 2100 uc->handle_reset = usb_mtp_handle_reset; 2101 uc->handle_control = usb_mtp_handle_control; 2102 uc->handle_data = usb_mtp_handle_data; 2103 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 2104 dc->desc = "USB Media Transfer Protocol device"; 2105 dc->fw_name = "mtp"; 2106 dc->vmsd = &vmstate_usb_mtp; 2107 device_class_set_props(dc, mtp_properties); 2108 } 2109 2110 static TypeInfo mtp_info = { 2111 .name = TYPE_USB_MTP, 2112 .parent = TYPE_USB_DEVICE, 2113 .instance_size = sizeof(MTPState), 2114 .class_init = usb_mtp_class_initfn, 2115 }; 2116 2117 static void usb_mtp_register_types(void) 2118 { 2119 type_register_static(&mtp_info); 2120 } 2121 2122 type_init(usb_mtp_register_types) 2123