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 #include "qom/object.h" 32 33 /* ----------------------------------------------------------------------- */ 34 35 enum mtp_container_type { 36 TYPE_COMMAND = 1, 37 TYPE_DATA = 2, 38 TYPE_RESPONSE = 3, 39 TYPE_EVENT = 4, 40 }; 41 42 /* MTP write stage, for internal use only */ 43 enum mtp_write_status { 44 WRITE_START = 1, 45 WRITE_CONTINUE = 2, 46 WRITE_END = 3, 47 }; 48 49 enum mtp_code { 50 /* command codes */ 51 CMD_GET_DEVICE_INFO = 0x1001, 52 CMD_OPEN_SESSION = 0x1002, 53 CMD_CLOSE_SESSION = 0x1003, 54 CMD_GET_STORAGE_IDS = 0x1004, 55 CMD_GET_STORAGE_INFO = 0x1005, 56 CMD_GET_NUM_OBJECTS = 0x1006, 57 CMD_GET_OBJECT_HANDLES = 0x1007, 58 CMD_GET_OBJECT_INFO = 0x1008, 59 CMD_GET_OBJECT = 0x1009, 60 CMD_DELETE_OBJECT = 0x100b, 61 CMD_SEND_OBJECT_INFO = 0x100c, 62 CMD_SEND_OBJECT = 0x100d, 63 CMD_GET_PARTIAL_OBJECT = 0x101b, 64 CMD_GET_OBJECT_PROPS_SUPPORTED = 0x9801, 65 CMD_GET_OBJECT_PROP_DESC = 0x9802, 66 CMD_GET_OBJECT_PROP_VALUE = 0x9803, 67 68 /* response codes */ 69 RES_OK = 0x2001, 70 RES_GENERAL_ERROR = 0x2002, 71 RES_SESSION_NOT_OPEN = 0x2003, 72 RES_INVALID_TRANSACTION_ID = 0x2004, 73 RES_OPERATION_NOT_SUPPORTED = 0x2005, 74 RES_PARAMETER_NOT_SUPPORTED = 0x2006, 75 RES_INCOMPLETE_TRANSFER = 0x2007, 76 RES_INVALID_STORAGE_ID = 0x2008, 77 RES_INVALID_OBJECT_HANDLE = 0x2009, 78 RES_INVALID_OBJECT_FORMAT_CODE = 0x200b, 79 RES_STORE_FULL = 0x200c, 80 RES_STORE_READ_ONLY = 0x200e, 81 RES_PARTIAL_DELETE = 0x2012, 82 RES_STORE_NOT_AVAILABLE = 0x2013, 83 RES_SPEC_BY_FORMAT_UNSUPPORTED = 0x2014, 84 RES_INVALID_OBJECTINFO = 0x2015, 85 RES_DESTINATION_UNSUPPORTED = 0x2020, 86 RES_INVALID_PARENT_OBJECT = 0x201a, 87 RES_INVALID_PARAMETER = 0x201d, 88 RES_SESSION_ALREADY_OPEN = 0x201e, 89 RES_INVALID_OBJECT_PROP_CODE = 0xA801, 90 91 /* format codes */ 92 FMT_UNDEFINED_OBJECT = 0x3000, 93 FMT_ASSOCIATION = 0x3001, 94 95 /* event codes */ 96 EVT_CANCEL_TRANSACTION = 0x4001, 97 EVT_OBJ_ADDED = 0x4002, 98 EVT_OBJ_REMOVED = 0x4003, 99 EVT_OBJ_INFO_CHANGED = 0x4007, 100 101 /* object properties */ 102 PROP_STORAGE_ID = 0xDC01, 103 PROP_OBJECT_FORMAT = 0xDC02, 104 PROP_OBJECT_COMPRESSED_SIZE = 0xDC04, 105 PROP_PARENT_OBJECT = 0xDC0B, 106 PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER = 0xDC41, 107 PROP_NAME = 0xDC44, 108 }; 109 110 enum mtp_data_type { 111 DATA_TYPE_UINT16 = 0x0004, 112 DATA_TYPE_UINT32 = 0x0006, 113 DATA_TYPE_UINT64 = 0x0008, 114 DATA_TYPE_UINT128 = 0x000a, 115 DATA_TYPE_STRING = 0xffff, 116 }; 117 118 typedef struct { 119 uint32_t length; 120 uint16_t type; 121 uint16_t code; 122 uint32_t trans; 123 } QEMU_PACKED mtp_container; 124 125 /* ----------------------------------------------------------------------- */ 126 127 typedef struct MTPState MTPState; 128 typedef struct MTPControl MTPControl; 129 typedef struct MTPData MTPData; 130 typedef struct MTPObject MTPObject; 131 132 enum { 133 EP_DATA_IN = 1, 134 EP_DATA_OUT, 135 EP_EVENT, 136 }; 137 138 typedef struct MTPMonEntry MTPMonEntry; 139 140 struct MTPMonEntry { 141 uint32_t event; 142 uint32_t handle; 143 144 QTAILQ_ENTRY(MTPMonEntry) next; 145 }; 146 147 struct MTPControl { 148 uint16_t code; 149 uint32_t trans; 150 int argc; 151 uint32_t argv[5]; 152 }; 153 154 struct MTPData { 155 uint16_t code; 156 uint32_t trans; 157 uint64_t offset; 158 uint64_t length; 159 uint64_t alloc; 160 uint8_t *data; 161 bool first; 162 /* Used for >4G file sizes */ 163 bool pending; 164 int fd; 165 uint8_t write_status; 166 /* Internal pointer per every MTP_WRITE_BUF_SZ */ 167 uint64_t data_offset; 168 }; 169 170 struct MTPObject { 171 uint32_t handle; 172 uint16_t format; 173 char *name; 174 char *path; 175 struct stat stat; 176 /* file monitor watch id */ 177 int64_t watchid; 178 MTPObject *parent; 179 uint32_t nchildren; 180 QLIST_HEAD(, MTPObject) children; 181 QLIST_ENTRY(MTPObject) list; 182 bool have_children; 183 QTAILQ_ENTRY(MTPObject) next; 184 }; 185 186 struct MTPState { 187 USBDevice dev; 188 char *root; 189 char *desc; 190 uint32_t flags; 191 192 MTPData *data_in; 193 MTPData *data_out; 194 MTPControl *result; 195 uint32_t session; 196 uint32_t next_handle; 197 bool readonly; 198 199 QTAILQ_HEAD(, MTPObject) objects; 200 QFileMonitor *file_monitor; 201 QTAILQ_HEAD(, MTPMonEntry) events; 202 /* Responder is expecting a write operation */ 203 bool write_pending; 204 struct { 205 uint32_t parent_handle; 206 uint16_t format; 207 uint32_t size; 208 char *filename; 209 } dataset; 210 }; 211 212 /* 213 * ObjectInfo dataset received from initiator 214 * Fields we don't care about are ignored 215 */ 216 typedef struct { 217 uint32_t storage_id; /*unused*/ 218 uint16_t format; 219 uint16_t protection_status; /*unused*/ 220 uint32_t size; 221 uint16_t thumb_format; /*unused*/ 222 uint32_t thumb_comp_sz; /*unused*/ 223 uint32_t thumb_pix_width; /*unused*/ 224 uint32_t thumb_pix_height; /*unused*/ 225 uint32_t image_pix_width; /*unused*/ 226 uint32_t image_pix_height; /*unused*/ 227 uint32_t image_bit_depth; /*unused*/ 228 uint32_t parent; /*unused*/ 229 uint16_t assoc_type; 230 uint32_t assoc_desc; 231 uint32_t seq_no; /*unused*/ 232 uint8_t length; /*part of filename field*/ 233 uint8_t filename[0]; /* UTF-16 encoded */ 234 char date_created[0]; /*unused*/ 235 char date_modified[0]; /*unused*/ 236 char keywords[0]; /*unused*/ 237 /* string and other data follows */ 238 } QEMU_PACKED ObjectInfo; 239 240 #define TYPE_USB_MTP "usb-mtp" 241 DECLARE_INSTANCE_CHECKER(MTPState, USB_MTP, 242 TYPE_USB_MTP) 243 244 #define QEMU_STORAGE_ID 0x00010001 245 246 #define MTP_FLAG_WRITABLE 0 247 248 #define FLAG_SET(_mtp, _flag) ((_mtp)->flags & (1 << (_flag))) 249 250 /* ----------------------------------------------------------------------- */ 251 252 #define MTP_MANUFACTURER "QEMU" 253 #define MTP_PRODUCT "QEMU filesharing" 254 #define MTP_WRITE_BUF_SZ (512 * KiB) 255 256 enum { 257 STR_MANUFACTURER = 1, 258 STR_PRODUCT, 259 STR_SERIALNUMBER, 260 STR_MTP, 261 STR_CONFIG_FULL, 262 STR_CONFIG_HIGH, 263 STR_CONFIG_SUPER, 264 }; 265 266 static const USBDescStrings desc_strings = { 267 [STR_MANUFACTURER] = MTP_MANUFACTURER, 268 [STR_PRODUCT] = MTP_PRODUCT, 269 [STR_SERIALNUMBER] = "34617", 270 [STR_MTP] = "MTP", 271 [STR_CONFIG_FULL] = "Full speed config (usb 1.1)", 272 [STR_CONFIG_HIGH] = "High speed config (usb 2.0)", 273 [STR_CONFIG_SUPER] = "Super speed config (usb 3.0)", 274 }; 275 276 static const USBDescIface desc_iface_full = { 277 .bInterfaceNumber = 0, 278 .bNumEndpoints = 3, 279 .bInterfaceClass = USB_CLASS_STILL_IMAGE, 280 .bInterfaceSubClass = 0x01, 281 .bInterfaceProtocol = 0x01, 282 .iInterface = STR_MTP, 283 .eps = (USBDescEndpoint[]) { 284 { 285 .bEndpointAddress = USB_DIR_IN | EP_DATA_IN, 286 .bmAttributes = USB_ENDPOINT_XFER_BULK, 287 .wMaxPacketSize = 64, 288 },{ 289 .bEndpointAddress = USB_DIR_OUT | EP_DATA_OUT, 290 .bmAttributes = USB_ENDPOINT_XFER_BULK, 291 .wMaxPacketSize = 64, 292 },{ 293 .bEndpointAddress = USB_DIR_IN | EP_EVENT, 294 .bmAttributes = USB_ENDPOINT_XFER_INT, 295 .wMaxPacketSize = 64, 296 .bInterval = 0x0a, 297 }, 298 } 299 }; 300 301 static const USBDescDevice desc_device_full = { 302 .bcdUSB = 0x0200, 303 .bMaxPacketSize0 = 8, 304 .bNumConfigurations = 1, 305 .confs = (USBDescConfig[]) { 306 { 307 .bNumInterfaces = 1, 308 .bConfigurationValue = 1, 309 .iConfiguration = STR_CONFIG_FULL, 310 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP, 311 .bMaxPower = 2, 312 .nif = 1, 313 .ifs = &desc_iface_full, 314 }, 315 }, 316 }; 317 318 static const USBDescIface desc_iface_high = { 319 .bInterfaceNumber = 0, 320 .bNumEndpoints = 3, 321 .bInterfaceClass = USB_CLASS_STILL_IMAGE, 322 .bInterfaceSubClass = 0x01, 323 .bInterfaceProtocol = 0x01, 324 .iInterface = STR_MTP, 325 .eps = (USBDescEndpoint[]) { 326 { 327 .bEndpointAddress = USB_DIR_IN | EP_DATA_IN, 328 .bmAttributes = USB_ENDPOINT_XFER_BULK, 329 .wMaxPacketSize = 512, 330 },{ 331 .bEndpointAddress = USB_DIR_OUT | EP_DATA_OUT, 332 .bmAttributes = USB_ENDPOINT_XFER_BULK, 333 .wMaxPacketSize = 512, 334 },{ 335 .bEndpointAddress = USB_DIR_IN | EP_EVENT, 336 .bmAttributes = USB_ENDPOINT_XFER_INT, 337 .wMaxPacketSize = 64, 338 .bInterval = 0x0a, 339 }, 340 } 341 }; 342 343 static const USBDescDevice desc_device_high = { 344 .bcdUSB = 0x0200, 345 .bMaxPacketSize0 = 64, 346 .bNumConfigurations = 1, 347 .confs = (USBDescConfig[]) { 348 { 349 .bNumInterfaces = 1, 350 .bConfigurationValue = 1, 351 .iConfiguration = STR_CONFIG_HIGH, 352 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP, 353 .bMaxPower = 2, 354 .nif = 1, 355 .ifs = &desc_iface_high, 356 }, 357 }, 358 }; 359 360 static const USBDescMSOS desc_msos = { 361 .CompatibleID = "MTP", 362 .SelectiveSuspendEnabled = true, 363 }; 364 365 static const USBDesc desc = { 366 .id = { 367 .idVendor = 0x46f4, /* CRC16() of "QEMU" */ 368 .idProduct = 0x0004, 369 .bcdDevice = 0, 370 .iManufacturer = STR_MANUFACTURER, 371 .iProduct = STR_PRODUCT, 372 .iSerialNumber = STR_SERIALNUMBER, 373 }, 374 .full = &desc_device_full, 375 .high = &desc_device_high, 376 .str = desc_strings, 377 .msos = &desc_msos, 378 }; 379 380 /* ----------------------------------------------------------------------- */ 381 382 static MTPObject *usb_mtp_object_alloc(MTPState *s, uint32_t handle, 383 MTPObject *parent, const char *name) 384 { 385 MTPObject *o = g_new0(MTPObject, 1); 386 387 if (name[0] == '.') { 388 goto ignore; 389 } 390 391 o->watchid = -1; 392 o->handle = handle; 393 o->parent = parent; 394 o->name = g_strdup(name); 395 if (parent == NULL) { 396 o->path = g_strdup(name); 397 } else { 398 o->path = g_strdup_printf("%s/%s", parent->path, name); 399 } 400 401 if (lstat(o->path, &o->stat) != 0) { 402 goto ignore; 403 } 404 if (S_ISREG(o->stat.st_mode)) { 405 o->format = FMT_UNDEFINED_OBJECT; 406 } else if (S_ISDIR(o->stat.st_mode)) { 407 o->format = FMT_ASSOCIATION; 408 } else { 409 goto ignore; 410 } 411 412 if (access(o->path, R_OK) != 0) { 413 goto ignore; 414 } 415 416 trace_usb_mtp_object_alloc(s->dev.addr, o->handle, o->path); 417 418 QTAILQ_INSERT_TAIL(&s->objects, o, next); 419 return o; 420 421 ignore: 422 g_free(o->name); 423 g_free(o->path); 424 g_free(o); 425 return NULL; 426 } 427 428 static void usb_mtp_object_free(MTPState *s, MTPObject *o) 429 { 430 MTPObject *iter; 431 432 if (!o) { 433 return; 434 } 435 436 trace_usb_mtp_object_free(s->dev.addr, o->handle, o->path); 437 438 if (o->watchid != -1 && s->file_monitor) { 439 qemu_file_monitor_remove_watch(s->file_monitor, o->path, o->watchid); 440 } 441 442 QTAILQ_REMOVE(&s->objects, o, next); 443 if (o->parent) { 444 QLIST_REMOVE(o, list); 445 o->parent->nchildren--; 446 } 447 448 while (!QLIST_EMPTY(&o->children)) { 449 iter = QLIST_FIRST(&o->children); 450 usb_mtp_object_free(s, iter); 451 } 452 g_free(o->name); 453 g_free(o->path); 454 g_free(o); 455 } 456 457 static MTPObject *usb_mtp_object_lookup(MTPState *s, uint32_t handle) 458 { 459 MTPObject *o; 460 461 QTAILQ_FOREACH(o, &s->objects, next) { 462 if (o->handle == handle) { 463 return o; 464 } 465 } 466 return NULL; 467 } 468 469 static MTPObject *usb_mtp_add_child(MTPState *s, MTPObject *o, 470 const char *name) 471 { 472 MTPObject *child = 473 usb_mtp_object_alloc(s, s->next_handle++, o, name); 474 475 if (child) { 476 trace_usb_mtp_add_child(s->dev.addr, child->handle, child->path); 477 QLIST_INSERT_HEAD(&o->children, child, list); 478 o->nchildren++; 479 480 if (child->format == FMT_ASSOCIATION) { 481 QLIST_INIT(&child->children); 482 } 483 } 484 485 return child; 486 } 487 488 static MTPObject *usb_mtp_object_lookup_name(MTPObject *parent, 489 const char *name, int len) 490 { 491 MTPObject *iter; 492 493 if (len == -1) { 494 len = strlen(name); 495 } 496 497 QLIST_FOREACH(iter, &parent->children, list) { 498 if (strncmp(iter->name, name, len) == 0) { 499 return iter; 500 } 501 } 502 503 return NULL; 504 } 505 506 static MTPObject *usb_mtp_object_lookup_id(MTPState *s, int64_t id) 507 { 508 MTPObject *iter; 509 510 QTAILQ_FOREACH(iter, &s->objects, next) { 511 if (iter->watchid == id) { 512 return iter; 513 } 514 } 515 516 return NULL; 517 } 518 519 static void file_monitor_event(int64_t id, 520 QFileMonitorEvent ev, 521 const char *name, 522 void *opaque) 523 { 524 MTPState *s = opaque; 525 MTPObject *parent = usb_mtp_object_lookup_id(s, id); 526 MTPMonEntry *entry = NULL; 527 MTPObject *o; 528 529 if (!parent) { 530 return; 531 } 532 533 switch (ev) { 534 case QFILE_MONITOR_EVENT_CREATED: 535 if (usb_mtp_object_lookup_name(parent, name, -1)) { 536 /* Duplicate create event */ 537 return; 538 } 539 entry = g_new0(MTPMonEntry, 1); 540 entry->handle = s->next_handle; 541 entry->event = EVT_OBJ_ADDED; 542 o = usb_mtp_add_child(s, parent, name); 543 if (!o) { 544 g_free(entry); 545 return; 546 } 547 trace_usb_mtp_file_monitor_event(s->dev.addr, name, "Obj Added"); 548 break; 549 550 case QFILE_MONITOR_EVENT_DELETED: 551 /* 552 * The kernel issues a IN_IGNORED event 553 * when a dir containing a watchpoint is 554 * deleted, so we don't have to delete the 555 * watchpoint 556 */ 557 o = usb_mtp_object_lookup_name(parent, name, -1); 558 if (!o) { 559 return; 560 } 561 entry = g_new0(MTPMonEntry, 1); 562 entry->handle = o->handle; 563 entry->event = EVT_OBJ_REMOVED; 564 trace_usb_mtp_file_monitor_event(s->dev.addr, o->path, "Obj Deleted"); 565 usb_mtp_object_free(s, o); 566 break; 567 568 case QFILE_MONITOR_EVENT_MODIFIED: 569 o = usb_mtp_object_lookup_name(parent, name, -1); 570 if (!o) { 571 return; 572 } 573 entry = g_new0(MTPMonEntry, 1); 574 entry->handle = o->handle; 575 entry->event = EVT_OBJ_INFO_CHANGED; 576 trace_usb_mtp_file_monitor_event(s->dev.addr, o->path, "Obj Modified"); 577 break; 578 579 case QFILE_MONITOR_EVENT_IGNORED: 580 trace_usb_mtp_file_monitor_event(s->dev.addr, parent->path, 581 "Obj parent dir ignored"); 582 break; 583 584 case QFILE_MONITOR_EVENT_ATTRIBUTES: 585 break; 586 587 default: 588 g_assert_not_reached(); 589 } 590 591 if (entry) { 592 QTAILQ_INSERT_HEAD(&s->events, entry, next); 593 } 594 } 595 596 static void usb_mtp_file_monitor_cleanup(MTPState *s) 597 { 598 MTPMonEntry *e, *p; 599 600 QTAILQ_FOREACH_SAFE(e, &s->events, next, p) { 601 QTAILQ_REMOVE(&s->events, e, next); 602 g_free(e); 603 } 604 605 qemu_file_monitor_free(s->file_monitor); 606 s->file_monitor = NULL; 607 } 608 609 610 static void usb_mtp_object_readdir(MTPState *s, MTPObject *o) 611 { 612 struct dirent *entry; 613 DIR *dir; 614 int fd; 615 Error *err = NULL; 616 617 if (o->have_children) { 618 return; 619 } 620 o->have_children = true; 621 622 fd = open(o->path, O_DIRECTORY | O_CLOEXEC | O_NOFOLLOW); 623 if (fd < 0) { 624 return; 625 } 626 dir = fdopendir(fd); 627 if (!dir) { 628 close(fd); 629 return; 630 } 631 632 if (s->file_monitor) { 633 int64_t id = qemu_file_monitor_add_watch(s->file_monitor, o->path, NULL, 634 file_monitor_event, s, &err); 635 if (id == -1) { 636 error_reportf_err(err, 637 "usb-mtp: failed to add watch for %s: ", 638 o->path); 639 } else { 640 trace_usb_mtp_file_monitor_event(s->dev.addr, o->path, 641 "Watch Added"); 642 o->watchid = id; 643 } 644 } 645 646 while ((entry = readdir(dir)) != NULL) { 647 usb_mtp_add_child(s, o, entry->d_name); 648 } 649 closedir(dir); 650 } 651 652 /* ----------------------------------------------------------------------- */ 653 654 static MTPData *usb_mtp_data_alloc(MTPControl *c) 655 { 656 MTPData *data = g_new0(MTPData, 1); 657 658 data->code = c->code; 659 data->trans = c->trans; 660 data->fd = -1; 661 data->first = true; 662 return data; 663 } 664 665 static void usb_mtp_data_free(MTPData *data) 666 { 667 if (data == NULL) { 668 return; 669 } 670 if (data->fd != -1) { 671 close(data->fd); 672 } 673 g_free(data->data); 674 g_free(data); 675 } 676 677 static void usb_mtp_realloc(MTPData *data, uint32_t bytes) 678 { 679 if (data->length + bytes <= data->alloc) { 680 return; 681 } 682 data->alloc = (data->length + bytes + 0xff) & ~0xff; 683 data->data = g_realloc(data->data, data->alloc); 684 } 685 686 static void usb_mtp_add_u8(MTPData *data, uint8_t val) 687 { 688 usb_mtp_realloc(data, 1); 689 data->data[data->length++] = val; 690 } 691 692 static void usb_mtp_add_u16(MTPData *data, uint16_t val) 693 { 694 usb_mtp_realloc(data, 2); 695 data->data[data->length++] = (val >> 0) & 0xff; 696 data->data[data->length++] = (val >> 8) & 0xff; 697 } 698 699 static void usb_mtp_add_u32(MTPData *data, uint32_t val) 700 { 701 usb_mtp_realloc(data, 4); 702 data->data[data->length++] = (val >> 0) & 0xff; 703 data->data[data->length++] = (val >> 8) & 0xff; 704 data->data[data->length++] = (val >> 16) & 0xff; 705 data->data[data->length++] = (val >> 24) & 0xff; 706 } 707 708 static void usb_mtp_add_u64(MTPData *data, uint64_t val) 709 { 710 usb_mtp_realloc(data, 8); 711 data->data[data->length++] = (val >> 0) & 0xff; 712 data->data[data->length++] = (val >> 8) & 0xff; 713 data->data[data->length++] = (val >> 16) & 0xff; 714 data->data[data->length++] = (val >> 24) & 0xff; 715 data->data[data->length++] = (val >> 32) & 0xff; 716 data->data[data->length++] = (val >> 40) & 0xff; 717 data->data[data->length++] = (val >> 48) & 0xff; 718 data->data[data->length++] = (val >> 56) & 0xff; 719 } 720 721 static void usb_mtp_add_u16_array(MTPData *data, uint32_t len, 722 const uint16_t *vals) 723 { 724 int i; 725 726 usb_mtp_add_u32(data, len); 727 for (i = 0; i < len; i++) { 728 usb_mtp_add_u16(data, vals[i]); 729 } 730 } 731 732 static void usb_mtp_add_u32_array(MTPData *data, uint32_t len, 733 const uint32_t *vals) 734 { 735 int i; 736 737 usb_mtp_add_u32(data, len); 738 for (i = 0; i < len; i++) { 739 usb_mtp_add_u32(data, vals[i]); 740 } 741 } 742 743 static void usb_mtp_add_wstr(MTPData *data, const wchar_t *str) 744 { 745 uint32_t len = wcslen(str); 746 int i; 747 748 if (len > 0) { 749 len++; /* include terminating L'\0' */ 750 } 751 752 usb_mtp_add_u8(data, len); 753 for (i = 0; i < len; i++) { 754 usb_mtp_add_u16(data, str[i]); 755 } 756 } 757 758 static void usb_mtp_add_str(MTPData *data, const char *str) 759 { 760 uint32_t len = strlen(str)+1; 761 wchar_t *wstr = g_new(wchar_t, len); 762 size_t ret; 763 764 ret = mbstowcs(wstr, str, len); 765 if (ret == -1) { 766 usb_mtp_add_wstr(data, L"Oops"); 767 } else { 768 usb_mtp_add_wstr(data, wstr); 769 } 770 771 g_free(wstr); 772 } 773 774 static void usb_mtp_add_time(MTPData *data, time_t time) 775 { 776 char buf[16]; 777 struct tm tm; 778 779 gmtime_r(&time, &tm); 780 strftime(buf, sizeof(buf), "%Y%m%dT%H%M%S", &tm); 781 usb_mtp_add_str(data, buf); 782 } 783 784 /* ----------------------------------------------------------------------- */ 785 786 static void usb_mtp_queue_result(MTPState *s, uint16_t code, uint32_t trans, 787 int argc, uint32_t arg0, uint32_t arg1, 788 uint32_t arg2) 789 { 790 MTPControl *c = g_new0(MTPControl, 1); 791 792 c->code = code; 793 c->trans = trans; 794 c->argc = argc; 795 if (argc > 0) { 796 c->argv[0] = arg0; 797 } 798 if (argc > 1) { 799 c->argv[1] = arg1; 800 } 801 if (argc > 2) { 802 c->argv[2] = arg2; 803 } 804 805 assert(s->result == NULL); 806 s->result = c; 807 } 808 809 /* ----------------------------------------------------------------------- */ 810 811 static MTPData *usb_mtp_get_device_info(MTPState *s, MTPControl *c) 812 { 813 static const uint16_t ops[] = { 814 CMD_GET_DEVICE_INFO, 815 CMD_OPEN_SESSION, 816 CMD_CLOSE_SESSION, 817 CMD_GET_STORAGE_IDS, 818 CMD_GET_STORAGE_INFO, 819 CMD_GET_NUM_OBJECTS, 820 CMD_GET_OBJECT_HANDLES, 821 CMD_GET_OBJECT_INFO, 822 CMD_DELETE_OBJECT, 823 CMD_SEND_OBJECT_INFO, 824 CMD_SEND_OBJECT, 825 CMD_GET_OBJECT, 826 CMD_GET_PARTIAL_OBJECT, 827 CMD_GET_OBJECT_PROPS_SUPPORTED, 828 CMD_GET_OBJECT_PROP_DESC, 829 CMD_GET_OBJECT_PROP_VALUE, 830 }; 831 static const uint16_t fmt[] = { 832 FMT_UNDEFINED_OBJECT, 833 FMT_ASSOCIATION, 834 }; 835 MTPData *d = usb_mtp_data_alloc(c); 836 837 trace_usb_mtp_op_get_device_info(s->dev.addr); 838 839 usb_mtp_add_u16(d, 100); 840 usb_mtp_add_u32(d, 0x00000006); 841 usb_mtp_add_u16(d, 0x0064); 842 usb_mtp_add_wstr(d, L""); 843 usb_mtp_add_u16(d, 0x0000); 844 845 usb_mtp_add_u16_array(d, ARRAY_SIZE(ops), ops); 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, 0, NULL); 849 usb_mtp_add_u16_array(d, ARRAY_SIZE(fmt), fmt); 850 851 usb_mtp_add_wstr(d, L"" MTP_MANUFACTURER); 852 usb_mtp_add_wstr(d, L"" MTP_PRODUCT); 853 usb_mtp_add_wstr(d, L"0.1"); 854 usb_mtp_add_wstr(d, L"0123456789abcdef0123456789abcdef"); 855 856 return d; 857 } 858 859 static MTPData *usb_mtp_get_storage_ids(MTPState *s, MTPControl *c) 860 { 861 static const uint32_t ids[] = { 862 QEMU_STORAGE_ID, 863 }; 864 MTPData *d = usb_mtp_data_alloc(c); 865 866 trace_usb_mtp_op_get_storage_ids(s->dev.addr); 867 868 usb_mtp_add_u32_array(d, ARRAY_SIZE(ids), ids); 869 870 return d; 871 } 872 873 static MTPData *usb_mtp_get_storage_info(MTPState *s, MTPControl *c) 874 { 875 MTPData *d = usb_mtp_data_alloc(c); 876 struct statvfs buf; 877 int rc; 878 879 trace_usb_mtp_op_get_storage_info(s->dev.addr); 880 881 if (FLAG_SET(s, MTP_FLAG_WRITABLE)) { 882 usb_mtp_add_u16(d, 0x0003); 883 usb_mtp_add_u16(d, 0x0002); 884 usb_mtp_add_u16(d, 0x0000); 885 } else { 886 usb_mtp_add_u16(d, 0x0001); 887 usb_mtp_add_u16(d, 0x0002); 888 usb_mtp_add_u16(d, 0x0001); 889 } 890 891 rc = statvfs(s->root, &buf); 892 if (rc == 0) { 893 usb_mtp_add_u64(d, (uint64_t)buf.f_frsize * buf.f_blocks); 894 usb_mtp_add_u64(d, (uint64_t)buf.f_bavail * buf.f_blocks); 895 usb_mtp_add_u32(d, buf.f_ffree); 896 } else { 897 usb_mtp_add_u64(d, 0xffffffff); 898 usb_mtp_add_u64(d, 0xffffffff); 899 usb_mtp_add_u32(d, 0xffffffff); 900 } 901 902 usb_mtp_add_str(d, s->desc); 903 usb_mtp_add_wstr(d, L"123456789abcdef"); 904 return d; 905 } 906 907 static MTPData *usb_mtp_get_object_handles(MTPState *s, MTPControl *c, 908 MTPObject *o) 909 { 910 MTPData *d = usb_mtp_data_alloc(c); 911 uint32_t i = 0, handles[o->nchildren]; 912 MTPObject *iter; 913 914 trace_usb_mtp_op_get_object_handles(s->dev.addr, o->handle, o->path); 915 916 QLIST_FOREACH(iter, &o->children, list) { 917 handles[i++] = iter->handle; 918 } 919 assert(i == o->nchildren); 920 usb_mtp_add_u32_array(d, o->nchildren, handles); 921 922 return d; 923 } 924 925 static MTPData *usb_mtp_get_object_info(MTPState *s, MTPControl *c, 926 MTPObject *o) 927 { 928 MTPData *d = usb_mtp_data_alloc(c); 929 930 trace_usb_mtp_op_get_object_info(s->dev.addr, o->handle, o->path); 931 932 usb_mtp_add_u32(d, QEMU_STORAGE_ID); 933 usb_mtp_add_u16(d, o->format); 934 usb_mtp_add_u16(d, 0); 935 936 if (o->stat.st_size > 0xFFFFFFFF) { 937 usb_mtp_add_u32(d, 0xFFFFFFFF); 938 } else { 939 usb_mtp_add_u32(d, o->stat.st_size); 940 } 941 942 usb_mtp_add_u16(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 usb_mtp_add_u32(d, 0); 949 950 if (o->parent) { 951 usb_mtp_add_u32(d, o->parent->handle); 952 } else { 953 usb_mtp_add_u32(d, 0); 954 } 955 if (o->format == FMT_ASSOCIATION) { 956 usb_mtp_add_u16(d, 0x0001); 957 usb_mtp_add_u32(d, 0x00000001); 958 usb_mtp_add_u32(d, 0); 959 } else { 960 usb_mtp_add_u16(d, 0); 961 usb_mtp_add_u32(d, 0); 962 usb_mtp_add_u32(d, 0); 963 } 964 965 usb_mtp_add_str(d, o->name); 966 usb_mtp_add_time(d, o->stat.st_ctime); 967 usb_mtp_add_time(d, o->stat.st_mtime); 968 usb_mtp_add_wstr(d, L""); 969 970 return d; 971 } 972 973 static MTPData *usb_mtp_get_object(MTPState *s, MTPControl *c, 974 MTPObject *o) 975 { 976 MTPData *d = usb_mtp_data_alloc(c); 977 978 trace_usb_mtp_op_get_object(s->dev.addr, o->handle, o->path); 979 980 d->fd = open(o->path, O_RDONLY | O_CLOEXEC | O_NOFOLLOW); 981 if (d->fd == -1) { 982 usb_mtp_data_free(d); 983 return NULL; 984 } 985 d->length = o->stat.st_size; 986 d->alloc = 512; 987 d->data = g_malloc(d->alloc); 988 return d; 989 } 990 991 static MTPData *usb_mtp_get_partial_object(MTPState *s, MTPControl *c, 992 MTPObject *o) 993 { 994 MTPData *d; 995 off_t offset; 996 997 if (c->argc <= 2) { 998 return NULL; 999 } 1000 trace_usb_mtp_op_get_partial_object(s->dev.addr, o->handle, o->path, 1001 c->argv[1], c->argv[2]); 1002 1003 d = usb_mtp_data_alloc(c); 1004 d->fd = open(o->path, O_RDONLY | O_CLOEXEC | O_NOFOLLOW); 1005 if (d->fd == -1) { 1006 usb_mtp_data_free(d); 1007 return NULL; 1008 } 1009 1010 offset = c->argv[1]; 1011 if (offset > o->stat.st_size) { 1012 offset = o->stat.st_size; 1013 } 1014 if (lseek(d->fd, offset, SEEK_SET) < 0) { 1015 usb_mtp_data_free(d); 1016 return NULL; 1017 } 1018 1019 d->length = c->argv[2]; 1020 if (d->length > o->stat.st_size - offset) { 1021 d->length = o->stat.st_size - offset; 1022 } 1023 1024 return d; 1025 } 1026 1027 static MTPData *usb_mtp_get_object_props_supported(MTPState *s, MTPControl *c) 1028 { 1029 static const uint16_t props[] = { 1030 PROP_STORAGE_ID, 1031 PROP_OBJECT_FORMAT, 1032 PROP_OBJECT_COMPRESSED_SIZE, 1033 PROP_PARENT_OBJECT, 1034 PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER, 1035 PROP_NAME, 1036 }; 1037 MTPData *d = usb_mtp_data_alloc(c); 1038 usb_mtp_add_u16_array(d, ARRAY_SIZE(props), props); 1039 1040 return d; 1041 } 1042 1043 static MTPData *usb_mtp_get_object_prop_desc(MTPState *s, MTPControl *c) 1044 { 1045 MTPData *d = usb_mtp_data_alloc(c); 1046 switch (c->argv[0]) { 1047 case PROP_STORAGE_ID: 1048 usb_mtp_add_u16(d, PROP_STORAGE_ID); 1049 usb_mtp_add_u16(d, DATA_TYPE_UINT32); 1050 usb_mtp_add_u8(d, 0x00); 1051 usb_mtp_add_u32(d, 0x00000000); 1052 usb_mtp_add_u32(d, 0x00000000); 1053 usb_mtp_add_u8(d, 0x00); 1054 break; 1055 case PROP_OBJECT_FORMAT: 1056 usb_mtp_add_u16(d, PROP_OBJECT_FORMAT); 1057 usb_mtp_add_u16(d, DATA_TYPE_UINT16); 1058 usb_mtp_add_u8(d, 0x00); 1059 usb_mtp_add_u16(d, 0x0000); 1060 usb_mtp_add_u32(d, 0x00000000); 1061 usb_mtp_add_u8(d, 0x00); 1062 break; 1063 case PROP_OBJECT_COMPRESSED_SIZE: 1064 usb_mtp_add_u16(d, PROP_OBJECT_COMPRESSED_SIZE); 1065 usb_mtp_add_u16(d, DATA_TYPE_UINT64); 1066 usb_mtp_add_u8(d, 0x00); 1067 usb_mtp_add_u64(d, 0x0000000000000000); 1068 usb_mtp_add_u32(d, 0x00000000); 1069 usb_mtp_add_u8(d, 0x00); 1070 break; 1071 case PROP_PARENT_OBJECT: 1072 usb_mtp_add_u16(d, PROP_PARENT_OBJECT); 1073 usb_mtp_add_u16(d, DATA_TYPE_UINT32); 1074 usb_mtp_add_u8(d, 0x00); 1075 usb_mtp_add_u32(d, 0x00000000); 1076 usb_mtp_add_u32(d, 0x00000000); 1077 usb_mtp_add_u8(d, 0x00); 1078 break; 1079 case PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER: 1080 usb_mtp_add_u16(d, PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER); 1081 usb_mtp_add_u16(d, DATA_TYPE_UINT128); 1082 usb_mtp_add_u8(d, 0x00); 1083 usb_mtp_add_u64(d, 0x0000000000000000); 1084 usb_mtp_add_u64(d, 0x0000000000000000); 1085 usb_mtp_add_u32(d, 0x00000000); 1086 usb_mtp_add_u8(d, 0x00); 1087 break; 1088 case PROP_NAME: 1089 usb_mtp_add_u16(d, PROP_NAME); 1090 usb_mtp_add_u16(d, DATA_TYPE_STRING); 1091 usb_mtp_add_u8(d, 0x00); 1092 usb_mtp_add_u8(d, 0x00); 1093 usb_mtp_add_u32(d, 0x00000000); 1094 usb_mtp_add_u8(d, 0x00); 1095 break; 1096 default: 1097 usb_mtp_data_free(d); 1098 return NULL; 1099 } 1100 1101 return d; 1102 } 1103 1104 static MTPData *usb_mtp_get_object_prop_value(MTPState *s, MTPControl *c, 1105 MTPObject *o) 1106 { 1107 MTPData *d = usb_mtp_data_alloc(c); 1108 switch (c->argv[1]) { 1109 case PROP_STORAGE_ID: 1110 usb_mtp_add_u32(d, QEMU_STORAGE_ID); 1111 break; 1112 case PROP_OBJECT_FORMAT: 1113 usb_mtp_add_u16(d, o->format); 1114 break; 1115 case PROP_OBJECT_COMPRESSED_SIZE: 1116 usb_mtp_add_u64(d, o->stat.st_size); 1117 break; 1118 case PROP_PARENT_OBJECT: 1119 if (o->parent == NULL) { 1120 usb_mtp_add_u32(d, 0x00000000); 1121 } else { 1122 usb_mtp_add_u32(d, o->parent->handle); 1123 } 1124 break; 1125 case PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER: 1126 /* Should be persistent between sessions, 1127 * but using our objedt ID is "good enough" 1128 * for now */ 1129 usb_mtp_add_u64(d, 0x0000000000000000); 1130 usb_mtp_add_u64(d, o->handle); 1131 break; 1132 case PROP_NAME: 1133 usb_mtp_add_str(d, o->name); 1134 break; 1135 default: 1136 usb_mtp_data_free(d); 1137 return NULL; 1138 } 1139 1140 return d; 1141 } 1142 1143 /* 1144 * Return values when object @o is deleted. 1145 * If at least one of the deletions succeeded, 1146 * DELETE_SUCCESS is set and if at least one 1147 * of the deletions failed, DELETE_FAILURE is 1148 * set. Both bits being set (DELETE_PARTIAL) 1149 * signifies a RES_PARTIAL_DELETE being sent 1150 * back to the initiator. 1151 */ 1152 enum { 1153 DELETE_SUCCESS = (1 << 0), 1154 DELETE_FAILURE = (1 << 1), 1155 DELETE_PARTIAL = (DELETE_FAILURE | DELETE_SUCCESS), 1156 }; 1157 1158 static int usb_mtp_deletefn(MTPState *s, MTPObject *o, uint32_t trans) 1159 { 1160 MTPObject *iter, *iter2; 1161 int ret = 0; 1162 1163 /* 1164 * TODO: Add support for Protection Status 1165 */ 1166 1167 QLIST_FOREACH(iter, &o->children, list) { 1168 if (iter->format == FMT_ASSOCIATION) { 1169 QLIST_FOREACH(iter2, &iter->children, list) { 1170 ret |= usb_mtp_deletefn(s, iter2, trans); 1171 } 1172 } 1173 } 1174 1175 if (o->format == FMT_UNDEFINED_OBJECT) { 1176 if (remove(o->path)) { 1177 ret |= DELETE_FAILURE; 1178 } else { 1179 usb_mtp_object_free(s, o); 1180 ret |= DELETE_SUCCESS; 1181 } 1182 } else if (o->format == FMT_ASSOCIATION) { 1183 if (rmdir(o->path)) { 1184 ret |= DELETE_FAILURE; 1185 } else { 1186 usb_mtp_object_free(s, o); 1187 ret |= DELETE_SUCCESS; 1188 } 1189 } 1190 1191 return ret; 1192 } 1193 1194 static void usb_mtp_object_delete(MTPState *s, uint32_t handle, 1195 uint32_t format_code, uint32_t trans) 1196 { 1197 MTPObject *o; 1198 int ret; 1199 1200 /* Return error if store is read-only */ 1201 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) { 1202 usb_mtp_queue_result(s, RES_STORE_READ_ONLY, 1203 trans, 0, 0, 0, 0); 1204 return; 1205 } 1206 1207 if (format_code != 0) { 1208 usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED, 1209 trans, 0, 0, 0, 0); 1210 return; 1211 } 1212 1213 if (handle == 0xFFFFFFF) { 1214 o = QTAILQ_FIRST(&s->objects); 1215 } else { 1216 o = usb_mtp_object_lookup(s, handle); 1217 } 1218 if (o == NULL) { 1219 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1220 trans, 0, 0, 0, 0); 1221 return; 1222 } 1223 1224 ret = usb_mtp_deletefn(s, o, trans); 1225 switch (ret) { 1226 case DELETE_SUCCESS: 1227 usb_mtp_queue_result(s, RES_OK, trans, 1228 0, 0, 0, 0); 1229 break; 1230 case DELETE_FAILURE: 1231 usb_mtp_queue_result(s, RES_PARTIAL_DELETE, 1232 trans, 0, 0, 0, 0); 1233 break; 1234 case DELETE_PARTIAL: 1235 usb_mtp_queue_result(s, RES_PARTIAL_DELETE, 1236 trans, 0, 0, 0, 0); 1237 break; 1238 default: 1239 g_assert_not_reached(); 1240 } 1241 1242 return; 1243 } 1244 1245 static void usb_mtp_command(MTPState *s, MTPControl *c) 1246 { 1247 MTPData *data_in = NULL; 1248 MTPObject *o = NULL; 1249 uint32_t nres = 0, res0 = 0; 1250 Error *err = NULL; 1251 1252 /* sanity checks */ 1253 if (c->code >= CMD_CLOSE_SESSION && s->session == 0) { 1254 usb_mtp_queue_result(s, RES_SESSION_NOT_OPEN, 1255 c->trans, 0, 0, 0, 0); 1256 return; 1257 } 1258 1259 /* process commands */ 1260 switch (c->code) { 1261 case CMD_GET_DEVICE_INFO: 1262 data_in = usb_mtp_get_device_info(s, c); 1263 break; 1264 case CMD_OPEN_SESSION: 1265 if (s->session) { 1266 usb_mtp_queue_result(s, RES_SESSION_ALREADY_OPEN, 1267 c->trans, 1, s->session, 0, 0); 1268 return; 1269 } 1270 if (c->argv[0] == 0) { 1271 usb_mtp_queue_result(s, RES_INVALID_PARAMETER, 1272 c->trans, 0, 0, 0, 0); 1273 return; 1274 } 1275 trace_usb_mtp_op_open_session(s->dev.addr); 1276 s->session = c->argv[0]; 1277 usb_mtp_object_alloc(s, s->next_handle++, NULL, s->root); 1278 1279 s->file_monitor = qemu_file_monitor_new(&err); 1280 if (err) { 1281 error_reportf_err(err, 1282 "usb-mtp: file monitoring init failed: "); 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