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 error_free(err); 638 } else { 639 trace_usb_mtp_file_monitor_event(s->dev.addr, o->path, 640 "Watch Added"); 641 o->watchid = id; 642 } 643 } 644 645 while ((entry = readdir(dir)) != NULL) { 646 usb_mtp_add_child(s, o, entry->d_name); 647 } 648 closedir(dir); 649 } 650 651 /* ----------------------------------------------------------------------- */ 652 653 static MTPData *usb_mtp_data_alloc(MTPControl *c) 654 { 655 MTPData *data = g_new0(MTPData, 1); 656 657 data->code = c->code; 658 data->trans = c->trans; 659 data->fd = -1; 660 data->first = true; 661 return data; 662 } 663 664 static void usb_mtp_data_free(MTPData *data) 665 { 666 if (data == NULL) { 667 return; 668 } 669 if (data->fd != -1) { 670 close(data->fd); 671 } 672 g_free(data->data); 673 g_free(data); 674 } 675 676 static void usb_mtp_realloc(MTPData *data, uint32_t bytes) 677 { 678 if (data->length + bytes <= data->alloc) { 679 return; 680 } 681 data->alloc = (data->length + bytes + 0xff) & ~0xff; 682 data->data = g_realloc(data->data, data->alloc); 683 } 684 685 static void usb_mtp_add_u8(MTPData *data, uint8_t val) 686 { 687 usb_mtp_realloc(data, 1); 688 data->data[data->length++] = val; 689 } 690 691 static void usb_mtp_add_u16(MTPData *data, uint16_t val) 692 { 693 usb_mtp_realloc(data, 2); 694 data->data[data->length++] = (val >> 0) & 0xff; 695 data->data[data->length++] = (val >> 8) & 0xff; 696 } 697 698 static void usb_mtp_add_u32(MTPData *data, uint32_t val) 699 { 700 usb_mtp_realloc(data, 4); 701 data->data[data->length++] = (val >> 0) & 0xff; 702 data->data[data->length++] = (val >> 8) & 0xff; 703 data->data[data->length++] = (val >> 16) & 0xff; 704 data->data[data->length++] = (val >> 24) & 0xff; 705 } 706 707 static void usb_mtp_add_u64(MTPData *data, uint64_t val) 708 { 709 usb_mtp_realloc(data, 8); 710 data->data[data->length++] = (val >> 0) & 0xff; 711 data->data[data->length++] = (val >> 8) & 0xff; 712 data->data[data->length++] = (val >> 16) & 0xff; 713 data->data[data->length++] = (val >> 24) & 0xff; 714 data->data[data->length++] = (val >> 32) & 0xff; 715 data->data[data->length++] = (val >> 40) & 0xff; 716 data->data[data->length++] = (val >> 48) & 0xff; 717 data->data[data->length++] = (val >> 56) & 0xff; 718 } 719 720 static void usb_mtp_add_u16_array(MTPData *data, uint32_t len, 721 const uint16_t *vals) 722 { 723 int i; 724 725 usb_mtp_add_u32(data, len); 726 for (i = 0; i < len; i++) { 727 usb_mtp_add_u16(data, vals[i]); 728 } 729 } 730 731 static void usb_mtp_add_u32_array(MTPData *data, uint32_t len, 732 const uint32_t *vals) 733 { 734 int i; 735 736 usb_mtp_add_u32(data, len); 737 for (i = 0; i < len; i++) { 738 usb_mtp_add_u32(data, vals[i]); 739 } 740 } 741 742 static void usb_mtp_add_wstr(MTPData *data, const wchar_t *str) 743 { 744 uint32_t len = wcslen(str); 745 int i; 746 747 if (len > 0) { 748 len++; /* include terminating L'\0' */ 749 } 750 751 usb_mtp_add_u8(data, len); 752 for (i = 0; i < len; i++) { 753 usb_mtp_add_u16(data, str[i]); 754 } 755 } 756 757 static void usb_mtp_add_str(MTPData *data, const char *str) 758 { 759 uint32_t len = strlen(str)+1; 760 wchar_t *wstr = g_new(wchar_t, len); 761 size_t ret; 762 763 ret = mbstowcs(wstr, str, len); 764 if (ret == -1) { 765 usb_mtp_add_wstr(data, L"Oops"); 766 } else { 767 usb_mtp_add_wstr(data, wstr); 768 } 769 770 g_free(wstr); 771 } 772 773 static void usb_mtp_add_time(MTPData *data, time_t time) 774 { 775 char buf[16]; 776 struct tm tm; 777 778 gmtime_r(&time, &tm); 779 strftime(buf, sizeof(buf), "%Y%m%dT%H%M%S", &tm); 780 usb_mtp_add_str(data, buf); 781 } 782 783 /* ----------------------------------------------------------------------- */ 784 785 static void usb_mtp_queue_result(MTPState *s, uint16_t code, uint32_t trans, 786 int argc, uint32_t arg0, uint32_t arg1, 787 uint32_t arg2) 788 { 789 MTPControl *c = g_new0(MTPControl, 1); 790 791 c->code = code; 792 c->trans = trans; 793 c->argc = argc; 794 if (argc > 0) { 795 c->argv[0] = arg0; 796 } 797 if (argc > 1) { 798 c->argv[1] = arg1; 799 } 800 if (argc > 2) { 801 c->argv[2] = arg2; 802 } 803 804 assert(s->result == NULL); 805 s->result = c; 806 } 807 808 /* ----------------------------------------------------------------------- */ 809 810 static MTPData *usb_mtp_get_device_info(MTPState *s, MTPControl *c) 811 { 812 static const uint16_t ops[] = { 813 CMD_GET_DEVICE_INFO, 814 CMD_OPEN_SESSION, 815 CMD_CLOSE_SESSION, 816 CMD_GET_STORAGE_IDS, 817 CMD_GET_STORAGE_INFO, 818 CMD_GET_NUM_OBJECTS, 819 CMD_GET_OBJECT_HANDLES, 820 CMD_GET_OBJECT_INFO, 821 CMD_DELETE_OBJECT, 822 CMD_SEND_OBJECT_INFO, 823 CMD_SEND_OBJECT, 824 CMD_GET_OBJECT, 825 CMD_GET_PARTIAL_OBJECT, 826 CMD_GET_OBJECT_PROPS_SUPPORTED, 827 CMD_GET_OBJECT_PROP_DESC, 828 CMD_GET_OBJECT_PROP_VALUE, 829 }; 830 static const uint16_t fmt[] = { 831 FMT_UNDEFINED_OBJECT, 832 FMT_ASSOCIATION, 833 }; 834 MTPData *d = usb_mtp_data_alloc(c); 835 836 trace_usb_mtp_op_get_device_info(s->dev.addr); 837 838 usb_mtp_add_u16(d, 100); 839 usb_mtp_add_u32(d, 0x00000006); 840 usb_mtp_add_u16(d, 0x0064); 841 usb_mtp_add_wstr(d, L""); 842 usb_mtp_add_u16(d, 0x0000); 843 844 usb_mtp_add_u16_array(d, ARRAY_SIZE(ops), ops); 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, 0, NULL); 848 usb_mtp_add_u16_array(d, ARRAY_SIZE(fmt), fmt); 849 850 usb_mtp_add_wstr(d, L"" MTP_MANUFACTURER); 851 usb_mtp_add_wstr(d, L"" MTP_PRODUCT); 852 usb_mtp_add_wstr(d, L"0.1"); 853 usb_mtp_add_wstr(d, L"0123456789abcdef0123456789abcdef"); 854 855 return d; 856 } 857 858 static MTPData *usb_mtp_get_storage_ids(MTPState *s, MTPControl *c) 859 { 860 static const uint32_t ids[] = { 861 QEMU_STORAGE_ID, 862 }; 863 MTPData *d = usb_mtp_data_alloc(c); 864 865 trace_usb_mtp_op_get_storage_ids(s->dev.addr); 866 867 usb_mtp_add_u32_array(d, ARRAY_SIZE(ids), ids); 868 869 return d; 870 } 871 872 static MTPData *usb_mtp_get_storage_info(MTPState *s, MTPControl *c) 873 { 874 MTPData *d = usb_mtp_data_alloc(c); 875 struct statvfs buf; 876 int rc; 877 878 trace_usb_mtp_op_get_storage_info(s->dev.addr); 879 880 if (FLAG_SET(s, MTP_FLAG_WRITABLE)) { 881 usb_mtp_add_u16(d, 0x0003); 882 usb_mtp_add_u16(d, 0x0002); 883 usb_mtp_add_u16(d, 0x0000); 884 } else { 885 usb_mtp_add_u16(d, 0x0001); 886 usb_mtp_add_u16(d, 0x0002); 887 usb_mtp_add_u16(d, 0x0001); 888 } 889 890 rc = statvfs(s->root, &buf); 891 if (rc == 0) { 892 usb_mtp_add_u64(d, (uint64_t)buf.f_frsize * buf.f_blocks); 893 usb_mtp_add_u64(d, (uint64_t)buf.f_bavail * buf.f_blocks); 894 usb_mtp_add_u32(d, buf.f_ffree); 895 } else { 896 usb_mtp_add_u64(d, 0xffffffff); 897 usb_mtp_add_u64(d, 0xffffffff); 898 usb_mtp_add_u32(d, 0xffffffff); 899 } 900 901 usb_mtp_add_str(d, s->desc); 902 usb_mtp_add_wstr(d, L"123456789abcdef"); 903 return d; 904 } 905 906 static MTPData *usb_mtp_get_object_handles(MTPState *s, MTPControl *c, 907 MTPObject *o) 908 { 909 MTPData *d = usb_mtp_data_alloc(c); 910 uint32_t i = 0, handles[o->nchildren]; 911 MTPObject *iter; 912 913 trace_usb_mtp_op_get_object_handles(s->dev.addr, o->handle, o->path); 914 915 QLIST_FOREACH(iter, &o->children, list) { 916 handles[i++] = iter->handle; 917 } 918 assert(i == o->nchildren); 919 usb_mtp_add_u32_array(d, o->nchildren, handles); 920 921 return d; 922 } 923 924 static MTPData *usb_mtp_get_object_info(MTPState *s, MTPControl *c, 925 MTPObject *o) 926 { 927 MTPData *d = usb_mtp_data_alloc(c); 928 929 trace_usb_mtp_op_get_object_info(s->dev.addr, o->handle, o->path); 930 931 usb_mtp_add_u32(d, QEMU_STORAGE_ID); 932 usb_mtp_add_u16(d, o->format); 933 usb_mtp_add_u16(d, 0); 934 935 if (o->stat.st_size > 0xFFFFFFFF) { 936 usb_mtp_add_u32(d, 0xFFFFFFFF); 937 } else { 938 usb_mtp_add_u32(d, o->stat.st_size); 939 } 940 941 usb_mtp_add_u16(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 usb_mtp_add_u32(d, 0); 948 949 if (o->parent) { 950 usb_mtp_add_u32(d, o->parent->handle); 951 } else { 952 usb_mtp_add_u32(d, 0); 953 } 954 if (o->format == FMT_ASSOCIATION) { 955 usb_mtp_add_u16(d, 0x0001); 956 usb_mtp_add_u32(d, 0x00000001); 957 usb_mtp_add_u32(d, 0); 958 } else { 959 usb_mtp_add_u16(d, 0); 960 usb_mtp_add_u32(d, 0); 961 usb_mtp_add_u32(d, 0); 962 } 963 964 usb_mtp_add_str(d, o->name); 965 usb_mtp_add_time(d, o->stat.st_ctime); 966 usb_mtp_add_time(d, o->stat.st_mtime); 967 usb_mtp_add_wstr(d, L""); 968 969 return d; 970 } 971 972 static MTPData *usb_mtp_get_object(MTPState *s, MTPControl *c, 973 MTPObject *o) 974 { 975 MTPData *d = usb_mtp_data_alloc(c); 976 977 trace_usb_mtp_op_get_object(s->dev.addr, o->handle, o->path); 978 979 d->fd = open(o->path, O_RDONLY | O_CLOEXEC | O_NOFOLLOW); 980 if (d->fd == -1) { 981 usb_mtp_data_free(d); 982 return NULL; 983 } 984 d->length = o->stat.st_size; 985 d->alloc = 512; 986 d->data = g_malloc(d->alloc); 987 return d; 988 } 989 990 static MTPData *usb_mtp_get_partial_object(MTPState *s, MTPControl *c, 991 MTPObject *o) 992 { 993 MTPData *d; 994 off_t offset; 995 996 if (c->argc <= 2) { 997 return NULL; 998 } 999 trace_usb_mtp_op_get_partial_object(s->dev.addr, o->handle, o->path, 1000 c->argv[1], c->argv[2]); 1001 1002 d = usb_mtp_data_alloc(c); 1003 d->fd = open(o->path, O_RDONLY | O_CLOEXEC | O_NOFOLLOW); 1004 if (d->fd == -1) { 1005 usb_mtp_data_free(d); 1006 return NULL; 1007 } 1008 1009 offset = c->argv[1]; 1010 if (offset > o->stat.st_size) { 1011 offset = o->stat.st_size; 1012 } 1013 if (lseek(d->fd, offset, SEEK_SET) < 0) { 1014 usb_mtp_data_free(d); 1015 return NULL; 1016 } 1017 1018 d->length = c->argv[2]; 1019 if (d->length > o->stat.st_size - offset) { 1020 d->length = o->stat.st_size - offset; 1021 } 1022 1023 return d; 1024 } 1025 1026 static MTPData *usb_mtp_get_object_props_supported(MTPState *s, MTPControl *c) 1027 { 1028 static const uint16_t props[] = { 1029 PROP_STORAGE_ID, 1030 PROP_OBJECT_FORMAT, 1031 PROP_OBJECT_COMPRESSED_SIZE, 1032 PROP_PARENT_OBJECT, 1033 PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER, 1034 PROP_NAME, 1035 }; 1036 MTPData *d = usb_mtp_data_alloc(c); 1037 usb_mtp_add_u16_array(d, ARRAY_SIZE(props), props); 1038 1039 return d; 1040 } 1041 1042 static MTPData *usb_mtp_get_object_prop_desc(MTPState *s, MTPControl *c) 1043 { 1044 MTPData *d = usb_mtp_data_alloc(c); 1045 switch (c->argv[0]) { 1046 case PROP_STORAGE_ID: 1047 usb_mtp_add_u16(d, PROP_STORAGE_ID); 1048 usb_mtp_add_u16(d, DATA_TYPE_UINT32); 1049 usb_mtp_add_u8(d, 0x00); 1050 usb_mtp_add_u32(d, 0x00000000); 1051 usb_mtp_add_u32(d, 0x00000000); 1052 usb_mtp_add_u8(d, 0x00); 1053 break; 1054 case PROP_OBJECT_FORMAT: 1055 usb_mtp_add_u16(d, PROP_OBJECT_FORMAT); 1056 usb_mtp_add_u16(d, DATA_TYPE_UINT16); 1057 usb_mtp_add_u8(d, 0x00); 1058 usb_mtp_add_u16(d, 0x0000); 1059 usb_mtp_add_u32(d, 0x00000000); 1060 usb_mtp_add_u8(d, 0x00); 1061 break; 1062 case PROP_OBJECT_COMPRESSED_SIZE: 1063 usb_mtp_add_u16(d, PROP_OBJECT_COMPRESSED_SIZE); 1064 usb_mtp_add_u16(d, DATA_TYPE_UINT64); 1065 usb_mtp_add_u8(d, 0x00); 1066 usb_mtp_add_u64(d, 0x0000000000000000); 1067 usb_mtp_add_u32(d, 0x00000000); 1068 usb_mtp_add_u8(d, 0x00); 1069 break; 1070 case PROP_PARENT_OBJECT: 1071 usb_mtp_add_u16(d, PROP_PARENT_OBJECT); 1072 usb_mtp_add_u16(d, DATA_TYPE_UINT32); 1073 usb_mtp_add_u8(d, 0x00); 1074 usb_mtp_add_u32(d, 0x00000000); 1075 usb_mtp_add_u32(d, 0x00000000); 1076 usb_mtp_add_u8(d, 0x00); 1077 break; 1078 case PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER: 1079 usb_mtp_add_u16(d, PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER); 1080 usb_mtp_add_u16(d, DATA_TYPE_UINT128); 1081 usb_mtp_add_u8(d, 0x00); 1082 usb_mtp_add_u64(d, 0x0000000000000000); 1083 usb_mtp_add_u64(d, 0x0000000000000000); 1084 usb_mtp_add_u32(d, 0x00000000); 1085 usb_mtp_add_u8(d, 0x00); 1086 break; 1087 case PROP_NAME: 1088 usb_mtp_add_u16(d, PROP_NAME); 1089 usb_mtp_add_u16(d, DATA_TYPE_STRING); 1090 usb_mtp_add_u8(d, 0x00); 1091 usb_mtp_add_u8(d, 0x00); 1092 usb_mtp_add_u32(d, 0x00000000); 1093 usb_mtp_add_u8(d, 0x00); 1094 break; 1095 default: 1096 usb_mtp_data_free(d); 1097 return NULL; 1098 } 1099 1100 return d; 1101 } 1102 1103 static MTPData *usb_mtp_get_object_prop_value(MTPState *s, MTPControl *c, 1104 MTPObject *o) 1105 { 1106 MTPData *d = usb_mtp_data_alloc(c); 1107 switch (c->argv[1]) { 1108 case PROP_STORAGE_ID: 1109 usb_mtp_add_u32(d, QEMU_STORAGE_ID); 1110 break; 1111 case PROP_OBJECT_FORMAT: 1112 usb_mtp_add_u16(d, o->format); 1113 break; 1114 case PROP_OBJECT_COMPRESSED_SIZE: 1115 usb_mtp_add_u64(d, o->stat.st_size); 1116 break; 1117 case PROP_PARENT_OBJECT: 1118 if (o->parent == NULL) { 1119 usb_mtp_add_u32(d, 0x00000000); 1120 } else { 1121 usb_mtp_add_u32(d, o->parent->handle); 1122 } 1123 break; 1124 case PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER: 1125 /* Should be persistent between sessions, 1126 * but using our objedt ID is "good enough" 1127 * for now */ 1128 usb_mtp_add_u64(d, 0x0000000000000000); 1129 usb_mtp_add_u64(d, o->handle); 1130 break; 1131 case PROP_NAME: 1132 usb_mtp_add_str(d, o->name); 1133 break; 1134 default: 1135 usb_mtp_data_free(d); 1136 return NULL; 1137 } 1138 1139 return d; 1140 } 1141 1142 /* 1143 * Return values when object @o is deleted. 1144 * If at least one of the deletions succeeded, 1145 * DELETE_SUCCESS is set and if at least one 1146 * of the deletions failed, DELETE_FAILURE is 1147 * set. Both bits being set (DELETE_PARTIAL) 1148 * signifies a RES_PARTIAL_DELETE being sent 1149 * back to the initiator. 1150 */ 1151 enum { 1152 DELETE_SUCCESS = (1 << 0), 1153 DELETE_FAILURE = (1 << 1), 1154 DELETE_PARTIAL = (DELETE_FAILURE | DELETE_SUCCESS), 1155 }; 1156 1157 static int usb_mtp_deletefn(MTPState *s, MTPObject *o, uint32_t trans) 1158 { 1159 MTPObject *iter, *iter2; 1160 int ret = 0; 1161 1162 /* 1163 * TODO: Add support for Protection Status 1164 */ 1165 1166 QLIST_FOREACH(iter, &o->children, list) { 1167 if (iter->format == FMT_ASSOCIATION) { 1168 QLIST_FOREACH(iter2, &iter->children, list) { 1169 ret |= usb_mtp_deletefn(s, iter2, trans); 1170 } 1171 } 1172 } 1173 1174 if (o->format == FMT_UNDEFINED_OBJECT) { 1175 if (remove(o->path)) { 1176 ret |= DELETE_FAILURE; 1177 } else { 1178 usb_mtp_object_free(s, o); 1179 ret |= DELETE_SUCCESS; 1180 } 1181 } else if (o->format == FMT_ASSOCIATION) { 1182 if (rmdir(o->path)) { 1183 ret |= DELETE_FAILURE; 1184 } else { 1185 usb_mtp_object_free(s, o); 1186 ret |= DELETE_SUCCESS; 1187 } 1188 } 1189 1190 return ret; 1191 } 1192 1193 static void usb_mtp_object_delete(MTPState *s, uint32_t handle, 1194 uint32_t format_code, uint32_t trans) 1195 { 1196 MTPObject *o; 1197 int ret; 1198 1199 /* Return error if store is read-only */ 1200 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) { 1201 usb_mtp_queue_result(s, RES_STORE_READ_ONLY, 1202 trans, 0, 0, 0, 0); 1203 return; 1204 } 1205 1206 if (format_code != 0) { 1207 usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED, 1208 trans, 0, 0, 0, 0); 1209 return; 1210 } 1211 1212 if (handle == 0xFFFFFFF) { 1213 o = QTAILQ_FIRST(&s->objects); 1214 } else { 1215 o = usb_mtp_object_lookup(s, handle); 1216 } 1217 if (o == NULL) { 1218 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1219 trans, 0, 0, 0, 0); 1220 return; 1221 } 1222 1223 ret = usb_mtp_deletefn(s, o, trans); 1224 switch (ret) { 1225 case DELETE_SUCCESS: 1226 usb_mtp_queue_result(s, RES_OK, trans, 1227 0, 0, 0, 0); 1228 break; 1229 case DELETE_FAILURE: 1230 usb_mtp_queue_result(s, RES_PARTIAL_DELETE, 1231 trans, 0, 0, 0, 0); 1232 break; 1233 case DELETE_PARTIAL: 1234 usb_mtp_queue_result(s, RES_PARTIAL_DELETE, 1235 trans, 0, 0, 0, 0); 1236 break; 1237 default: 1238 g_assert_not_reached(); 1239 } 1240 1241 return; 1242 } 1243 1244 static void usb_mtp_command(MTPState *s, MTPControl *c) 1245 { 1246 MTPData *data_in = NULL; 1247 MTPObject *o = NULL; 1248 uint32_t nres = 0, res0 = 0; 1249 Error *err = NULL; 1250 1251 /* sanity checks */ 1252 if (c->code >= CMD_CLOSE_SESSION && s->session == 0) { 1253 usb_mtp_queue_result(s, RES_SESSION_NOT_OPEN, 1254 c->trans, 0, 0, 0, 0); 1255 return; 1256 } 1257 1258 /* process commands */ 1259 switch (c->code) { 1260 case CMD_GET_DEVICE_INFO: 1261 data_in = usb_mtp_get_device_info(s, c); 1262 break; 1263 case CMD_OPEN_SESSION: 1264 if (s->session) { 1265 usb_mtp_queue_result(s, RES_SESSION_ALREADY_OPEN, 1266 c->trans, 1, s->session, 0, 0); 1267 return; 1268 } 1269 if (c->argv[0] == 0) { 1270 usb_mtp_queue_result(s, RES_INVALID_PARAMETER, 1271 c->trans, 0, 0, 0, 0); 1272 return; 1273 } 1274 trace_usb_mtp_op_open_session(s->dev.addr); 1275 s->session = c->argv[0]; 1276 usb_mtp_object_alloc(s, s->next_handle++, NULL, s->root); 1277 1278 s->file_monitor = qemu_file_monitor_new(&err); 1279 if (err) { 1280 error_reportf_err(err, 1281 "usb-mtp: file monitoring init failed: "); 1282 error_free(err); 1283 } else { 1284 QTAILQ_INIT(&s->events); 1285 } 1286 break; 1287 case CMD_CLOSE_SESSION: 1288 trace_usb_mtp_op_close_session(s->dev.addr); 1289 s->session = 0; 1290 s->next_handle = 0; 1291 usb_mtp_file_monitor_cleanup(s); 1292 usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects)); 1293 assert(QTAILQ_EMPTY(&s->objects)); 1294 break; 1295 case CMD_GET_STORAGE_IDS: 1296 data_in = usb_mtp_get_storage_ids(s, c); 1297 break; 1298 case CMD_GET_STORAGE_INFO: 1299 if (c->argv[0] != QEMU_STORAGE_ID && 1300 c->argv[0] != 0xffffffff) { 1301 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID, 1302 c->trans, 0, 0, 0, 0); 1303 return; 1304 } 1305 data_in = usb_mtp_get_storage_info(s, c); 1306 break; 1307 case CMD_GET_NUM_OBJECTS: 1308 case CMD_GET_OBJECT_HANDLES: 1309 if (c->argv[0] != QEMU_STORAGE_ID && 1310 c->argv[0] != 0xffffffff) { 1311 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID, 1312 c->trans, 0, 0, 0, 0); 1313 return; 1314 } 1315 if (c->argv[1] != 0x00000000) { 1316 usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED, 1317 c->trans, 0, 0, 0, 0); 1318 return; 1319 } 1320 if (c->argv[2] == 0x00000000 || 1321 c->argv[2] == 0xffffffff) { 1322 o = QTAILQ_FIRST(&s->objects); 1323 } else { 1324 o = usb_mtp_object_lookup(s, c->argv[2]); 1325 } 1326 if (o == NULL) { 1327 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1328 c->trans, 0, 0, 0, 0); 1329 return; 1330 } 1331 if (o->format != FMT_ASSOCIATION) { 1332 usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT, 1333 c->trans, 0, 0, 0, 0); 1334 return; 1335 } 1336 usb_mtp_object_readdir(s, o); 1337 if (c->code == CMD_GET_NUM_OBJECTS) { 1338 trace_usb_mtp_op_get_num_objects(s->dev.addr, o->handle, o->path); 1339 nres = 1; 1340 res0 = o->nchildren; 1341 } else { 1342 data_in = usb_mtp_get_object_handles(s, c, o); 1343 } 1344 break; 1345 case CMD_GET_OBJECT_INFO: 1346 o = usb_mtp_object_lookup(s, c->argv[0]); 1347 if (o == NULL) { 1348 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1349 c->trans, 0, 0, 0, 0); 1350 return; 1351 } 1352 data_in = usb_mtp_get_object_info(s, c, o); 1353 break; 1354 case CMD_GET_OBJECT: 1355 o = usb_mtp_object_lookup(s, c->argv[0]); 1356 if (o == NULL) { 1357 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1358 c->trans, 0, 0, 0, 0); 1359 return; 1360 } 1361 if (o->format == FMT_ASSOCIATION) { 1362 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1363 c->trans, 0, 0, 0, 0); 1364 return; 1365 } 1366 data_in = usb_mtp_get_object(s, c, o); 1367 if (data_in == NULL) { 1368 usb_mtp_queue_result(s, RES_GENERAL_ERROR, 1369 c->trans, 0, 0, 0, 0); 1370 return; 1371 } 1372 break; 1373 case CMD_DELETE_OBJECT: 1374 usb_mtp_object_delete(s, c->argv[0], c->argv[1], c->trans); 1375 return; 1376 case CMD_GET_PARTIAL_OBJECT: 1377 o = usb_mtp_object_lookup(s, c->argv[0]); 1378 if (o == NULL) { 1379 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1380 c->trans, 0, 0, 0, 0); 1381 return; 1382 } 1383 if (o->format == FMT_ASSOCIATION) { 1384 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1385 c->trans, 0, 0, 0, 0); 1386 return; 1387 } 1388 data_in = usb_mtp_get_partial_object(s, c, o); 1389 if (data_in == NULL) { 1390 usb_mtp_queue_result(s, RES_GENERAL_ERROR, 1391 c->trans, 0, 0, 0, 0); 1392 return; 1393 } 1394 nres = 1; 1395 res0 = data_in->length; 1396 break; 1397 case CMD_SEND_OBJECT_INFO: 1398 /* Return error if store is read-only */ 1399 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) { 1400 usb_mtp_queue_result(s, RES_STORE_READ_ONLY, 1401 c->trans, 0, 0, 0, 0); 1402 } else if (c->argv[0] && (c->argv[0] != QEMU_STORAGE_ID)) { 1403 /* First parameter points to storage id or is 0 */ 1404 usb_mtp_queue_result(s, RES_STORE_NOT_AVAILABLE, c->trans, 1405 0, 0, 0, 0); 1406 } else if (c->argv[1] && !c->argv[0]) { 1407 /* If second parameter is specified, first must also be specified */ 1408 usb_mtp_queue_result(s, RES_DESTINATION_UNSUPPORTED, c->trans, 1409 0, 0, 0, 0); 1410 } else { 1411 uint32_t handle = c->argv[1]; 1412 if (handle == 0xFFFFFFFF || handle == 0) { 1413 /* root object */ 1414 o = QTAILQ_FIRST(&s->objects); 1415 } else { 1416 o = usb_mtp_object_lookup(s, handle); 1417 } 1418 if (o == NULL) { 1419 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, c->trans, 1420 0, 0, 0, 0); 1421 } else if (o->format != FMT_ASSOCIATION) { 1422 usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT, c->trans, 1423 0, 0, 0, 0); 1424 } 1425 } 1426 if (o) { 1427 s->dataset.parent_handle = o->handle; 1428 } 1429 s->data_out = usb_mtp_data_alloc(c); 1430 return; 1431 case CMD_SEND_OBJECT: 1432 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) { 1433 usb_mtp_queue_result(s, RES_STORE_READ_ONLY, 1434 c->trans, 0, 0, 0, 0); 1435 return; 1436 } 1437 if (!s->write_pending) { 1438 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, 1439 c->trans, 0, 0, 0, 0); 1440 return; 1441 } 1442 s->data_out = usb_mtp_data_alloc(c); 1443 return; 1444 case CMD_GET_OBJECT_PROPS_SUPPORTED: 1445 if (c->argv[0] != FMT_UNDEFINED_OBJECT && 1446 c->argv[0] != FMT_ASSOCIATION) { 1447 usb_mtp_queue_result(s, RES_INVALID_OBJECT_FORMAT_CODE, 1448 c->trans, 0, 0, 0, 0); 1449 return; 1450 } 1451 data_in = usb_mtp_get_object_props_supported(s, c); 1452 break; 1453 case CMD_GET_OBJECT_PROP_DESC: 1454 if (c->argv[1] != FMT_UNDEFINED_OBJECT && 1455 c->argv[1] != FMT_ASSOCIATION) { 1456 usb_mtp_queue_result(s, RES_INVALID_OBJECT_FORMAT_CODE, 1457 c->trans, 0, 0, 0, 0); 1458 return; 1459 } 1460 data_in = usb_mtp_get_object_prop_desc(s, c); 1461 if (data_in == NULL) { 1462 usb_mtp_queue_result(s, RES_INVALID_OBJECT_PROP_CODE, 1463 c->trans, 0, 0, 0, 0); 1464 return; 1465 } 1466 break; 1467 case CMD_GET_OBJECT_PROP_VALUE: 1468 o = usb_mtp_object_lookup(s, c->argv[0]); 1469 if (o == NULL) { 1470 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1471 c->trans, 0, 0, 0, 0); 1472 return; 1473 } 1474 data_in = usb_mtp_get_object_prop_value(s, c, o); 1475 if (data_in == NULL) { 1476 usb_mtp_queue_result(s, RES_INVALID_OBJECT_PROP_CODE, 1477 c->trans, 0, 0, 0, 0); 1478 return; 1479 } 1480 break; 1481 default: 1482 trace_usb_mtp_op_unknown(s->dev.addr, c->code); 1483 usb_mtp_queue_result(s, RES_OPERATION_NOT_SUPPORTED, 1484 c->trans, 0, 0, 0, 0); 1485 return; 1486 } 1487 1488 /* return results on success */ 1489 if (data_in) { 1490 assert(s->data_in == NULL); 1491 s->data_in = data_in; 1492 } 1493 usb_mtp_queue_result(s, RES_OK, c->trans, nres, res0, 0, 0); 1494 } 1495 1496 /* ----------------------------------------------------------------------- */ 1497 1498 static void usb_mtp_handle_reset(USBDevice *dev) 1499 { 1500 MTPState *s = USB_MTP(dev); 1501 1502 trace_usb_mtp_reset(s->dev.addr); 1503 1504 usb_mtp_file_monitor_cleanup(s); 1505 usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects)); 1506 s->session = 0; 1507 usb_mtp_data_free(s->data_in); 1508 s->data_in = NULL; 1509 usb_mtp_data_free(s->data_out); 1510 s->data_out = NULL; 1511 g_free(s->result); 1512 s->result = NULL; 1513 } 1514 1515 static void usb_mtp_handle_control(USBDevice *dev, USBPacket *p, 1516 int request, int value, int index, 1517 int length, uint8_t *data) 1518 { 1519 int ret; 1520 MTPState *s = USB_MTP(dev); 1521 uint16_t *event = (uint16_t *)data; 1522 1523 switch (request) { 1524 case ClassInterfaceOutRequest | 0x64: 1525 if (*event == EVT_CANCEL_TRANSACTION) { 1526 g_free(s->result); 1527 s->result = NULL; 1528 usb_mtp_data_free(s->data_in); 1529 s->data_in = NULL; 1530 if (s->write_pending) { 1531 g_free(s->dataset.filename); 1532 s->write_pending = false; 1533 s->dataset.size = 0; 1534 } 1535 usb_mtp_data_free(s->data_out); 1536 s->data_out = NULL; 1537 } else { 1538 p->status = USB_RET_STALL; 1539 } 1540 break; 1541 default: 1542 ret = usb_desc_handle_control(dev, p, request, 1543 value, index, length, data); 1544 if (ret >= 0) { 1545 return; 1546 } 1547 } 1548 1549 trace_usb_mtp_stall(dev->addr, "unknown control request"); 1550 } 1551 1552 static void usb_mtp_cancel_packet(USBDevice *dev, USBPacket *p) 1553 { 1554 /* we don't use async packets, so this should never be called */ 1555 fprintf(stderr, "%s\n", __func__); 1556 } 1557 1558 static char *utf16_to_str(uint8_t len, uint8_t *str16) 1559 { 1560 wchar_t *wstr = g_new0(wchar_t, len + 1); 1561 int count, dlen; 1562 char *dest; 1563 1564 for (count = 0; count < len; count++) { 1565 /* FIXME: not working for surrogate pairs */ 1566 wstr[count] = lduw_le_p(str16 + (count * 2)); 1567 } 1568 wstr[count] = 0; 1569 1570 dlen = wcstombs(NULL, wstr, 0) + 1; 1571 dest = g_malloc(dlen); 1572 wcstombs(dest, wstr, dlen); 1573 g_free(wstr); 1574 return dest; 1575 } 1576 1577 /* Wrapper around write, returns 0 on failure */ 1578 static uint64_t write_retry(int fd, void *buf, uint64_t size, off_t offset) 1579 { 1580 uint64_t ret = 0; 1581 1582 if (lseek(fd, offset, SEEK_SET) < 0) { 1583 goto done; 1584 } 1585 1586 ret = qemu_write_full(fd, buf, size); 1587 1588 done: 1589 return ret; 1590 } 1591 1592 static int usb_mtp_update_object(MTPObject *parent, char *name) 1593 { 1594 int ret = 0; 1595 1596 MTPObject *o = 1597 usb_mtp_object_lookup_name(parent, name, strlen(name)); 1598 1599 if (o) { 1600 ret = lstat(o->path, &o->stat); 1601 } 1602 1603 return ret; 1604 } 1605 1606 static void usb_mtp_write_data(MTPState *s, uint32_t handle) 1607 { 1608 MTPData *d = s->data_out; 1609 MTPObject *parent = 1610 usb_mtp_object_lookup(s, s->dataset.parent_handle); 1611 char *path = NULL; 1612 uint64_t rc; 1613 mode_t mask = 0644; 1614 int ret = 0; 1615 1616 assert(d != NULL); 1617 1618 switch (d->write_status) { 1619 case WRITE_START: 1620 if (!parent || !s->write_pending) { 1621 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, d->trans, 1622 0, 0, 0, 0); 1623 return; 1624 } 1625 1626 if (s->dataset.filename) { 1627 path = g_strdup_printf("%s/%s", parent->path, s->dataset.filename); 1628 if (s->dataset.format == FMT_ASSOCIATION) { 1629 ret = mkdir(path, mask); 1630 if (!ret) { 1631 usb_mtp_queue_result(s, RES_OK, d->trans, 3, 1632 QEMU_STORAGE_ID, 1633 s->dataset.parent_handle, 1634 handle); 1635 goto close; 1636 } 1637 goto done; 1638 } 1639 1640 d->fd = open(path, O_CREAT | O_WRONLY | 1641 O_CLOEXEC | O_NOFOLLOW, mask); 1642 if (d->fd == -1) { 1643 ret = 1; 1644 goto done; 1645 } 1646 1647 /* Return success if initiator sent 0 sized data */ 1648 if (!s->dataset.size) { 1649 goto done; 1650 } 1651 if (d->length != MTP_WRITE_BUF_SZ && !d->pending) { 1652 d->write_status = WRITE_END; 1653 } 1654 } 1655 /* fall through */ 1656 case WRITE_CONTINUE: 1657 case WRITE_END: 1658 rc = write_retry(d->fd, d->data, d->data_offset, 1659 d->offset - d->data_offset); 1660 if (rc != d->data_offset) { 1661 ret = 1; 1662 goto done; 1663 } 1664 if (d->write_status != WRITE_END) { 1665 g_free(path); 1666 return; 1667 } else { 1668 /* 1669 * Return an incomplete transfer if file size doesn't match 1670 * for < 4G file or if lstat fails which will result in an incorrect 1671 * file size 1672 */ 1673 if ((s->dataset.size != 0xFFFFFFFF && 1674 d->offset != s->dataset.size) || 1675 usb_mtp_update_object(parent, s->dataset.filename)) { 1676 usb_mtp_queue_result(s, RES_INCOMPLETE_TRANSFER, d->trans, 1677 0, 0, 0, 0); 1678 goto close; 1679 } 1680 } 1681 } 1682 1683 done: 1684 if (ret) { 1685 usb_mtp_queue_result(s, RES_STORE_FULL, d->trans, 1686 0, 0, 0, 0); 1687 } else { 1688 usb_mtp_queue_result(s, RES_OK, d->trans, 1689 0, 0, 0, 0); 1690 } 1691 close: 1692 /* 1693 * The write dataset is kept around and freed only 1694 * on success or if another write request comes in 1695 */ 1696 if (d->fd != -1) { 1697 close(d->fd); 1698 d->fd = -1; 1699 } 1700 g_free(s->dataset.filename); 1701 s->dataset.size = 0; 1702 g_free(path); 1703 s->write_pending = false; 1704 } 1705 1706 static void usb_mtp_write_metadata(MTPState *s, uint64_t dlen) 1707 { 1708 MTPData *d = s->data_out; 1709 ObjectInfo *dataset = (ObjectInfo *)d->data; 1710 char *filename; 1711 MTPObject *o; 1712 MTPObject *p = usb_mtp_object_lookup(s, s->dataset.parent_handle); 1713 uint32_t next_handle = s->next_handle; 1714 size_t filename_chars = dlen - offsetof(ObjectInfo, filename); 1715 1716 /* 1717 * filename is utf-16. We're intentionally doing 1718 * integer division to truncate if malicious guest 1719 * sent an odd number of bytes. 1720 */ 1721 filename_chars /= 2; 1722 1723 assert(!s->write_pending); 1724 assert(p != NULL); 1725 1726 filename = utf16_to_str(MIN(dataset->length, filename_chars), 1727 dataset->filename); 1728 1729 if (strchr(filename, '/')) { 1730 usb_mtp_queue_result(s, RES_PARAMETER_NOT_SUPPORTED, d->trans, 1731 0, 0, 0, 0); 1732 g_free(filename); 1733 return; 1734 } 1735 1736 o = usb_mtp_object_lookup_name(p, filename, -1); 1737 if (o != NULL) { 1738 next_handle = o->handle; 1739 } 1740 1741 s->dataset.filename = filename; 1742 s->dataset.format = dataset->format; 1743 s->dataset.size = dataset->size; 1744 s->write_pending = true; 1745 1746 if (s->dataset.format == FMT_ASSOCIATION) { 1747 usb_mtp_write_data(s, next_handle); 1748 } else { 1749 usb_mtp_queue_result(s, RES_OK, d->trans, 3, QEMU_STORAGE_ID, 1750 s->dataset.parent_handle, next_handle); 1751 } 1752 } 1753 1754 static void usb_mtp_get_data(MTPState *s, mtp_container *container, 1755 USBPacket *p) 1756 { 1757 MTPData *d = s->data_out; 1758 uint64_t dlen; 1759 uint32_t data_len = p->iov.size; 1760 uint64_t total_len; 1761 1762 if (!d) { 1763 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, 0, 1764 0, 0, 0, 0); 1765 return; 1766 } 1767 if (d->first) { 1768 /* Total length of incoming data */ 1769 total_len = cpu_to_le32(container->length) - sizeof(mtp_container); 1770 /* Length of data in this packet */ 1771 data_len -= sizeof(mtp_container); 1772 if (total_len < MTP_WRITE_BUF_SZ) { 1773 usb_mtp_realloc(d, total_len); 1774 d->length += total_len; 1775 } else { 1776 usb_mtp_realloc(d, MTP_WRITE_BUF_SZ - sizeof(mtp_container)); 1777 d->length += MTP_WRITE_BUF_SZ - sizeof(mtp_container); 1778 } 1779 d->offset = 0; 1780 d->first = false; 1781 d->pending = false; 1782 d->data_offset = 0; 1783 d->write_status = WRITE_START; 1784 } 1785 1786 if (d->pending) { 1787 memset(d->data, 0, d->length); 1788 if (d->length != MTP_WRITE_BUF_SZ) { 1789 usb_mtp_realloc(d, MTP_WRITE_BUF_SZ - d->length); 1790 d->length += (MTP_WRITE_BUF_SZ - d->length); 1791 } 1792 d->pending = false; 1793 d->write_status = WRITE_CONTINUE; 1794 d->data_offset = 0; 1795 } 1796 1797 if (d->length - d->data_offset > data_len) { 1798 dlen = data_len; 1799 } else { 1800 dlen = d->length - d->data_offset; 1801 } 1802 1803 switch (d->code) { 1804 case CMD_SEND_OBJECT_INFO: 1805 usb_packet_copy(p, d->data + d->data_offset, dlen); 1806 d->offset += dlen; 1807 d->data_offset += dlen; 1808 if (d->data_offset == d->length) { 1809 /* The operation might have already failed */ 1810 if (!s->result) { 1811 usb_mtp_write_metadata(s, dlen); 1812 } 1813 usb_mtp_data_free(s->data_out); 1814 s->data_out = NULL; 1815 return; 1816 } 1817 break; 1818 case CMD_SEND_OBJECT: 1819 usb_packet_copy(p, d->data + d->data_offset, dlen); 1820 d->offset += dlen; 1821 d->data_offset += dlen; 1822 if ((p->iov.size % 64) || !p->iov.size) { 1823 assert((s->dataset.size == 0xFFFFFFFF) || 1824 (s->dataset.size == d->offset)); 1825 1826 if (d->length == MTP_WRITE_BUF_SZ) { 1827 d->write_status = WRITE_END; 1828 } else { 1829 d->write_status = WRITE_START; 1830 } 1831 usb_mtp_write_data(s, 0); 1832 usb_mtp_data_free(s->data_out); 1833 s->data_out = NULL; 1834 return; 1835 } 1836 if (d->data_offset == d->length) { 1837 d->pending = true; 1838 usb_mtp_write_data(s, 0); 1839 } 1840 break; 1841 default: 1842 p->status = USB_RET_STALL; 1843 return; 1844 } 1845 } 1846 1847 static void usb_mtp_handle_data(USBDevice *dev, USBPacket *p) 1848 { 1849 MTPState *s = USB_MTP(dev); 1850 MTPControl cmd; 1851 mtp_container container; 1852 uint32_t params[5]; 1853 uint16_t container_type; 1854 int i, rc; 1855 1856 switch (p->ep->nr) { 1857 case EP_DATA_IN: 1858 if (s->data_out != NULL) { 1859 /* guest bug */ 1860 trace_usb_mtp_stall(s->dev.addr, "awaiting data-out"); 1861 p->status = USB_RET_STALL; 1862 return; 1863 } 1864 if (p->iov.size < sizeof(container)) { 1865 trace_usb_mtp_stall(s->dev.addr, "packet too small"); 1866 p->status = USB_RET_STALL; 1867 return; 1868 } 1869 if (s->data_in != NULL) { 1870 MTPData *d = s->data_in; 1871 uint64_t dlen = d->length - d->offset; 1872 if (d->first) { 1873 trace_usb_mtp_data_in(s->dev.addr, d->trans, d->length); 1874 if (d->length + sizeof(container) > 0xFFFFFFFF) { 1875 container.length = cpu_to_le32(0xFFFFFFFF); 1876 } else { 1877 container.length = 1878 cpu_to_le32(d->length + sizeof(container)); 1879 } 1880 container.type = cpu_to_le16(TYPE_DATA); 1881 container.code = cpu_to_le16(d->code); 1882 container.trans = cpu_to_le32(d->trans); 1883 usb_packet_copy(p, &container, sizeof(container)); 1884 d->first = false; 1885 if (dlen > p->iov.size - sizeof(container)) { 1886 dlen = p->iov.size - sizeof(container); 1887 } 1888 } else { 1889 if (dlen > p->iov.size) { 1890 dlen = p->iov.size; 1891 } 1892 } 1893 if (d->fd == -1) { 1894 usb_packet_copy(p, d->data + d->offset, dlen); 1895 } else { 1896 if (d->alloc < p->iov.size) { 1897 d->alloc = p->iov.size; 1898 d->data = g_realloc(d->data, d->alloc); 1899 } 1900 rc = read(d->fd, d->data, dlen); 1901 if (rc != dlen) { 1902 memset(d->data, 0, dlen); 1903 s->result->code = RES_INCOMPLETE_TRANSFER; 1904 } 1905 usb_packet_copy(p, d->data, dlen); 1906 } 1907 d->offset += dlen; 1908 if (d->offset == d->length) { 1909 usb_mtp_data_free(s->data_in); 1910 s->data_in = NULL; 1911 } 1912 } else if (s->result != NULL) { 1913 MTPControl *r = s->result; 1914 int length = sizeof(container) + r->argc * sizeof(uint32_t); 1915 if (r->code == RES_OK) { 1916 trace_usb_mtp_success(s->dev.addr, r->trans, 1917 (r->argc > 0) ? r->argv[0] : 0, 1918 (r->argc > 1) ? r->argv[1] : 0); 1919 } else { 1920 trace_usb_mtp_error(s->dev.addr, r->code, r->trans, 1921 (r->argc > 0) ? r->argv[0] : 0, 1922 (r->argc > 1) ? r->argv[1] : 0); 1923 } 1924 container.length = cpu_to_le32(length); 1925 container.type = cpu_to_le16(TYPE_RESPONSE); 1926 container.code = cpu_to_le16(r->code); 1927 container.trans = cpu_to_le32(r->trans); 1928 for (i = 0; i < r->argc; i++) { 1929 params[i] = cpu_to_le32(r->argv[i]); 1930 } 1931 usb_packet_copy(p, &container, sizeof(container)); 1932 usb_packet_copy(p, ¶ms, length - sizeof(container)); 1933 g_free(s->result); 1934 s->result = NULL; 1935 } 1936 break; 1937 case EP_DATA_OUT: 1938 if (p->iov.size < sizeof(container)) { 1939 trace_usb_mtp_stall(s->dev.addr, "packet too small"); 1940 p->status = USB_RET_STALL; 1941 return; 1942 } 1943 if ((s->data_out != NULL) && !s->data_out->first) { 1944 container_type = TYPE_DATA; 1945 } else { 1946 usb_packet_copy(p, &container, sizeof(container)); 1947 container_type = le16_to_cpu(container.type); 1948 } 1949 switch (container_type) { 1950 case TYPE_COMMAND: 1951 if (s->data_in || s->data_out || s->result) { 1952 trace_usb_mtp_stall(s->dev.addr, "transaction inflight"); 1953 p->status = USB_RET_STALL; 1954 return; 1955 } 1956 cmd.code = le16_to_cpu(container.code); 1957 cmd.argc = (le32_to_cpu(container.length) - sizeof(container)) 1958 / sizeof(uint32_t); 1959 cmd.trans = le32_to_cpu(container.trans); 1960 if (cmd.argc > ARRAY_SIZE(cmd.argv)) { 1961 cmd.argc = ARRAY_SIZE(cmd.argv); 1962 } 1963 if (p->iov.size < sizeof(container) + cmd.argc * sizeof(uint32_t)) { 1964 trace_usb_mtp_stall(s->dev.addr, "packet too small"); 1965 p->status = USB_RET_STALL; 1966 return; 1967 } 1968 usb_packet_copy(p, ¶ms, cmd.argc * sizeof(uint32_t)); 1969 for (i = 0; i < cmd.argc; i++) { 1970 cmd.argv[i] = le32_to_cpu(params[i]); 1971 } 1972 trace_usb_mtp_command(s->dev.addr, cmd.code, cmd.trans, 1973 (cmd.argc > 0) ? cmd.argv[0] : 0, 1974 (cmd.argc > 1) ? cmd.argv[1] : 0, 1975 (cmd.argc > 2) ? cmd.argv[2] : 0, 1976 (cmd.argc > 3) ? cmd.argv[3] : 0, 1977 (cmd.argc > 4) ? cmd.argv[4] : 0); 1978 usb_mtp_command(s, &cmd); 1979 break; 1980 case TYPE_DATA: 1981 /* One of the previous transfers has already errored but the 1982 * responder is still sending data associated with it 1983 */ 1984 if (s->result != NULL) { 1985 return; 1986 } 1987 usb_mtp_get_data(s, &container, p); 1988 break; 1989 default: 1990 /* not needed as long as the mtp device is read-only */ 1991 p->status = USB_RET_STALL; 1992 return; 1993 } 1994 break; 1995 case EP_EVENT: 1996 if (!QTAILQ_EMPTY(&s->events)) { 1997 struct MTPMonEntry *e = QTAILQ_LAST(&s->events); 1998 uint32_t handle; 1999 int len = sizeof(container) + sizeof(uint32_t); 2000 2001 if (p->iov.size < len) { 2002 trace_usb_mtp_stall(s->dev.addr, 2003 "packet too small to send event"); 2004 p->status = USB_RET_STALL; 2005 return; 2006 } 2007 2008 QTAILQ_REMOVE(&s->events, e, next); 2009 container.length = cpu_to_le32(len); 2010 container.type = cpu_to_le32(TYPE_EVENT); 2011 container.code = cpu_to_le16(e->event); 2012 container.trans = 0; /* no trans specific events */ 2013 handle = cpu_to_le32(e->handle); 2014 usb_packet_copy(p, &container, sizeof(container)); 2015 usb_packet_copy(p, &handle, sizeof(uint32_t)); 2016 g_free(e); 2017 return; 2018 } 2019 p->status = USB_RET_NAK; 2020 return; 2021 default: 2022 trace_usb_mtp_stall(s->dev.addr, "invalid endpoint"); 2023 p->status = USB_RET_STALL; 2024 return; 2025 } 2026 2027 if (p->actual_length == 0) { 2028 trace_usb_mtp_nak(s->dev.addr, p->ep->nr); 2029 p->status = USB_RET_NAK; 2030 return; 2031 } else { 2032 trace_usb_mtp_xfer(s->dev.addr, p->ep->nr, p->actual_length, 2033 p->iov.size); 2034 return; 2035 } 2036 } 2037 2038 static void usb_mtp_realize(USBDevice *dev, Error **errp) 2039 { 2040 MTPState *s = USB_MTP(dev); 2041 2042 if ((s->root == NULL) || !g_path_is_absolute(s->root)) { 2043 error_setg(errp, "usb-mtp: rootdir must be configured and be an absolute path"); 2044 return; 2045 } 2046 2047 if (access(s->root, R_OK) != 0) { 2048 error_setg(errp, "usb-mtp: rootdir does not exist/not readable"); 2049 return; 2050 } else if (!s->readonly && access(s->root, W_OK) != 0) { 2051 error_setg(errp, "usb-mtp: rootdir does not have write permissions"); 2052 return; 2053 } 2054 2055 /* Mark store as RW */ 2056 if (!s->readonly) { 2057 s->flags |= (1 << MTP_FLAG_WRITABLE); 2058 } 2059 2060 if (s->desc == NULL) { 2061 /* 2062 * This does not check if path exists 2063 * but we have the checks above 2064 */ 2065 s->desc = g_path_get_basename(s->root); 2066 } 2067 2068 usb_desc_create_serial(dev); 2069 usb_desc_init(dev); 2070 QTAILQ_INIT(&s->objects); 2071 2072 } 2073 2074 static const VMStateDescription vmstate_usb_mtp = { 2075 .name = "usb-mtp", 2076 .unmigratable = 1, 2077 .version_id = 1, 2078 .minimum_version_id = 1, 2079 .fields = (VMStateField[]) { 2080 VMSTATE_USB_DEVICE(dev, MTPState), 2081 VMSTATE_END_OF_LIST() 2082 } 2083 }; 2084 2085 static Property mtp_properties[] = { 2086 DEFINE_PROP_STRING("rootdir", MTPState, root), 2087 DEFINE_PROP_STRING("desc", MTPState, desc), 2088 DEFINE_PROP_BOOL("readonly", MTPState, readonly, true), 2089 DEFINE_PROP_END_OF_LIST(), 2090 }; 2091 2092 static void usb_mtp_class_initfn(ObjectClass *klass, void *data) 2093 { 2094 DeviceClass *dc = DEVICE_CLASS(klass); 2095 USBDeviceClass *uc = USB_DEVICE_CLASS(klass); 2096 2097 uc->realize = usb_mtp_realize; 2098 uc->product_desc = "QEMU USB MTP"; 2099 uc->usb_desc = &desc; 2100 uc->cancel_packet = usb_mtp_cancel_packet; 2101 uc->handle_attach = usb_desc_attach; 2102 uc->handle_reset = usb_mtp_handle_reset; 2103 uc->handle_control = usb_mtp_handle_control; 2104 uc->handle_data = usb_mtp_handle_data; 2105 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 2106 dc->desc = "USB Media Transfer Protocol device"; 2107 dc->fw_name = "mtp"; 2108 dc->vmsd = &vmstate_usb_mtp; 2109 device_class_set_props(dc, mtp_properties); 2110 } 2111 2112 static TypeInfo mtp_info = { 2113 .name = TYPE_USB_MTP, 2114 .parent = TYPE_USB_DEVICE, 2115 .instance_size = sizeof(MTPState), 2116 .class_init = usb_mtp_class_initfn, 2117 }; 2118 2119 static void usb_mtp_register_types(void) 2120 { 2121 type_register_static(&mtp_info); 2122 } 2123 2124 type_init(usb_mtp_register_types) 2125