1 /* 2 * Media Transfer Protocol implementation, backed by host filesystem. 3 * 4 * Copyright Red Hat, Inc 2014 5 * 6 * Author: 7 * Gerd Hoffmann <kraxel@redhat.com> 8 * 9 * This code is licensed under the GPL v2 or later. 10 */ 11 12 #include "qemu/osdep.h" 13 #include "qapi/error.h" 14 #include "qemu/error-report.h" 15 #include <wchar.h> 16 #include <dirent.h> 17 #include <glib/gstdio.h> 18 #include <sys/statvfs.h> 19 20 21 #include "qemu/iov.h" 22 #include "qemu/module.h" 23 #include "qemu/filemonitor.h" 24 #include "trace.h" 25 #include "hw/qdev-properties.h" 26 #include "hw/usb.h" 27 #include "migration/vmstate.h" 28 #include "desc.h" 29 #include "qemu/units.h" 30 #include "qom/object.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 MTPControl MTPControl; 127 typedef struct MTPData MTPData; 128 typedef struct MTPObject MTPObject; 129 130 #define TYPE_USB_MTP "usb-mtp" 131 OBJECT_DECLARE_SIMPLE_TYPE(MTPState, USB_MTP) 132 133 enum { 134 EP_DATA_IN = 1, 135 EP_DATA_OUT, 136 EP_EVENT, 137 }; 138 139 typedef struct MTPMonEntry MTPMonEntry; 140 141 struct MTPMonEntry { 142 uint32_t event; 143 uint32_t handle; 144 145 QTAILQ_ENTRY(MTPMonEntry) next; 146 }; 147 148 struct MTPControl { 149 uint16_t code; 150 uint32_t trans; 151 int argc; 152 uint32_t argv[5]; 153 }; 154 155 struct MTPData { 156 uint16_t code; 157 uint32_t trans; 158 uint64_t offset; 159 uint64_t length; 160 uint64_t alloc; 161 uint8_t *data; 162 bool first; 163 /* Used for >4G file sizes */ 164 bool pending; 165 int fd; 166 uint8_t write_status; 167 /* Internal pointer per every MTP_WRITE_BUF_SZ */ 168 uint64_t data_offset; 169 }; 170 171 struct MTPObject { 172 uint32_t handle; 173 uint16_t format; 174 char *name; 175 char *path; 176 struct stat stat; 177 /* file monitor watch id */ 178 int64_t watchid; 179 MTPObject *parent; 180 uint32_t nchildren; 181 QLIST_HEAD(, MTPObject) children; 182 QLIST_ENTRY(MTPObject) list; 183 bool have_children; 184 QTAILQ_ENTRY(MTPObject) next; 185 }; 186 187 struct MTPState { 188 USBDevice dev; 189 char *root; 190 char *desc; 191 uint32_t flags; 192 193 MTPData *data_in; 194 MTPData *data_out; 195 MTPControl *result; 196 uint32_t session; 197 uint32_t next_handle; 198 bool readonly; 199 200 QTAILQ_HEAD(, MTPObject) objects; 201 QFileMonitor *file_monitor; 202 QTAILQ_HEAD(, MTPMonEntry) events; 203 /* Responder is expecting a write operation */ 204 bool write_pending; 205 struct { 206 uint32_t parent_handle; 207 uint16_t format; 208 uint32_t size; 209 char *filename; 210 } dataset; 211 }; 212 213 /* 214 * ObjectInfo dataset received from initiator 215 * Fields we don't care about are ignored 216 */ 217 typedef struct { 218 uint32_t storage_id; /*unused*/ 219 uint16_t format; 220 uint16_t protection_status; /*unused*/ 221 uint32_t size; 222 uint16_t thumb_format; /*unused*/ 223 uint32_t thumb_comp_sz; /*unused*/ 224 uint32_t thumb_pix_width; /*unused*/ 225 uint32_t thumb_pix_height; /*unused*/ 226 uint32_t image_pix_width; /*unused*/ 227 uint32_t image_pix_height; /*unused*/ 228 uint32_t image_bit_depth; /*unused*/ 229 uint32_t parent; /*unused*/ 230 uint16_t assoc_type; 231 uint32_t assoc_desc; 232 uint32_t seq_no; /*unused*/ 233 uint8_t length; /*part of filename field*/ 234 uint8_t filename[0]; /* UTF-16 encoded */ 235 char date_created[0]; /*unused*/ 236 char date_modified[0]; /*unused*/ 237 char keywords[0]; /*unused*/ 238 /* string and other data follows */ 239 } QEMU_PACKED ObjectInfo; 240 241 #define QEMU_STORAGE_ID 0x00010001 242 243 #define MTP_FLAG_WRITABLE 0 244 245 #define FLAG_SET(_mtp, _flag) ((_mtp)->flags & (1 << (_flag))) 246 247 /* ----------------------------------------------------------------------- */ 248 249 #define MTP_MANUFACTURER "QEMU" 250 #define MTP_PRODUCT "QEMU filesharing" 251 #define MTP_WRITE_BUF_SZ (512 * KiB) 252 253 enum { 254 STR_MANUFACTURER = 1, 255 STR_PRODUCT, 256 STR_SERIALNUMBER, 257 STR_MTP, 258 STR_CONFIG_FULL, 259 STR_CONFIG_HIGH, 260 STR_CONFIG_SUPER, 261 }; 262 263 static const USBDescStrings desc_strings = { 264 [STR_MANUFACTURER] = MTP_MANUFACTURER, 265 [STR_PRODUCT] = MTP_PRODUCT, 266 [STR_SERIALNUMBER] = "34617", 267 [STR_MTP] = "MTP", 268 [STR_CONFIG_FULL] = "Full speed config (usb 1.1)", 269 [STR_CONFIG_HIGH] = "High speed config (usb 2.0)", 270 [STR_CONFIG_SUPER] = "Super speed config (usb 3.0)", 271 }; 272 273 static const USBDescIface desc_iface_full = { 274 .bInterfaceNumber = 0, 275 .bNumEndpoints = 3, 276 .bInterfaceClass = USB_CLASS_STILL_IMAGE, 277 .bInterfaceSubClass = 0x01, 278 .bInterfaceProtocol = 0x01, 279 .iInterface = STR_MTP, 280 .eps = (USBDescEndpoint[]) { 281 { 282 .bEndpointAddress = USB_DIR_IN | EP_DATA_IN, 283 .bmAttributes = USB_ENDPOINT_XFER_BULK, 284 .wMaxPacketSize = 64, 285 },{ 286 .bEndpointAddress = USB_DIR_OUT | EP_DATA_OUT, 287 .bmAttributes = USB_ENDPOINT_XFER_BULK, 288 .wMaxPacketSize = 64, 289 },{ 290 .bEndpointAddress = USB_DIR_IN | EP_EVENT, 291 .bmAttributes = USB_ENDPOINT_XFER_INT, 292 .wMaxPacketSize = 64, 293 .bInterval = 0x0a, 294 }, 295 } 296 }; 297 298 static const USBDescDevice desc_device_full = { 299 .bcdUSB = 0x0200, 300 .bMaxPacketSize0 = 8, 301 .bNumConfigurations = 1, 302 .confs = (USBDescConfig[]) { 303 { 304 .bNumInterfaces = 1, 305 .bConfigurationValue = 1, 306 .iConfiguration = STR_CONFIG_FULL, 307 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP, 308 .bMaxPower = 2, 309 .nif = 1, 310 .ifs = &desc_iface_full, 311 }, 312 }, 313 }; 314 315 static const USBDescIface desc_iface_high = { 316 .bInterfaceNumber = 0, 317 .bNumEndpoints = 3, 318 .bInterfaceClass = USB_CLASS_STILL_IMAGE, 319 .bInterfaceSubClass = 0x01, 320 .bInterfaceProtocol = 0x01, 321 .iInterface = STR_MTP, 322 .eps = (USBDescEndpoint[]) { 323 { 324 .bEndpointAddress = USB_DIR_IN | EP_DATA_IN, 325 .bmAttributes = USB_ENDPOINT_XFER_BULK, 326 .wMaxPacketSize = 512, 327 },{ 328 .bEndpointAddress = USB_DIR_OUT | EP_DATA_OUT, 329 .bmAttributes = USB_ENDPOINT_XFER_BULK, 330 .wMaxPacketSize = 512, 331 },{ 332 .bEndpointAddress = USB_DIR_IN | EP_EVENT, 333 .bmAttributes = USB_ENDPOINT_XFER_INT, 334 .wMaxPacketSize = 64, 335 .bInterval = 0x0a, 336 }, 337 } 338 }; 339 340 static const USBDescDevice desc_device_high = { 341 .bcdUSB = 0x0200, 342 .bMaxPacketSize0 = 64, 343 .bNumConfigurations = 1, 344 .confs = (USBDescConfig[]) { 345 { 346 .bNumInterfaces = 1, 347 .bConfigurationValue = 1, 348 .iConfiguration = STR_CONFIG_HIGH, 349 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP, 350 .bMaxPower = 2, 351 .nif = 1, 352 .ifs = &desc_iface_high, 353 }, 354 }, 355 }; 356 357 static const USBDescMSOS desc_msos = { 358 .CompatibleID = "MTP", 359 .SelectiveSuspendEnabled = true, 360 }; 361 362 static const USBDesc desc = { 363 .id = { 364 .idVendor = 0x46f4, /* CRC16() of "QEMU" */ 365 .idProduct = 0x0004, 366 .bcdDevice = 0, 367 .iManufacturer = STR_MANUFACTURER, 368 .iProduct = STR_PRODUCT, 369 .iSerialNumber = STR_SERIALNUMBER, 370 }, 371 .full = &desc_device_full, 372 .high = &desc_device_high, 373 .str = desc_strings, 374 .msos = &desc_msos, 375 }; 376 377 /* ----------------------------------------------------------------------- */ 378 379 static MTPObject *usb_mtp_object_alloc(MTPState *s, uint32_t handle, 380 MTPObject *parent, const char *name) 381 { 382 MTPObject *o = g_new0(MTPObject, 1); 383 384 if (name[0] == '.') { 385 goto ignore; 386 } 387 388 o->watchid = -1; 389 o->handle = handle; 390 o->parent = parent; 391 o->name = g_strdup(name); 392 if (parent == NULL) { 393 o->path = g_strdup(name); 394 } else { 395 o->path = g_strdup_printf("%s/%s", parent->path, name); 396 } 397 398 if (lstat(o->path, &o->stat) != 0) { 399 goto ignore; 400 } 401 if (S_ISREG(o->stat.st_mode)) { 402 o->format = FMT_UNDEFINED_OBJECT; 403 } else if (S_ISDIR(o->stat.st_mode)) { 404 o->format = FMT_ASSOCIATION; 405 } else { 406 goto ignore; 407 } 408 409 if (access(o->path, R_OK) != 0) { 410 goto ignore; 411 } 412 413 trace_usb_mtp_object_alloc(s->dev.addr, o->handle, o->path); 414 415 QTAILQ_INSERT_TAIL(&s->objects, o, next); 416 return o; 417 418 ignore: 419 g_free(o->name); 420 g_free(o->path); 421 g_free(o); 422 return NULL; 423 } 424 425 static void usb_mtp_object_free(MTPState *s, MTPObject *o) 426 { 427 MTPObject *iter; 428 429 if (!o) { 430 return; 431 } 432 433 trace_usb_mtp_object_free(s->dev.addr, o->handle, o->path); 434 435 if (o->watchid != -1 && s->file_monitor) { 436 qemu_file_monitor_remove_watch(s->file_monitor, o->path, o->watchid); 437 } 438 439 QTAILQ_REMOVE(&s->objects, o, next); 440 if (o->parent) { 441 QLIST_REMOVE(o, list); 442 o->parent->nchildren--; 443 } 444 445 while (!QLIST_EMPTY(&o->children)) { 446 iter = QLIST_FIRST(&o->children); 447 usb_mtp_object_free(s, iter); 448 } 449 g_free(o->name); 450 g_free(o->path); 451 g_free(o); 452 } 453 454 static MTPObject *usb_mtp_object_lookup(MTPState *s, uint32_t handle) 455 { 456 MTPObject *o; 457 458 QTAILQ_FOREACH(o, &s->objects, next) { 459 if (o->handle == handle) { 460 return o; 461 } 462 } 463 return NULL; 464 } 465 466 static MTPObject *usb_mtp_add_child(MTPState *s, MTPObject *o, 467 const char *name) 468 { 469 MTPObject *child = 470 usb_mtp_object_alloc(s, s->next_handle++, o, name); 471 472 if (child) { 473 trace_usb_mtp_add_child(s->dev.addr, child->handle, child->path); 474 QLIST_INSERT_HEAD(&o->children, child, list); 475 o->nchildren++; 476 477 if (child->format == FMT_ASSOCIATION) { 478 QLIST_INIT(&child->children); 479 } 480 } 481 482 return child; 483 } 484 485 static MTPObject *usb_mtp_object_lookup_name(MTPObject *parent, 486 const char *name, int len) 487 { 488 MTPObject *iter; 489 490 if (len == -1) { 491 len = strlen(name); 492 } 493 494 QLIST_FOREACH(iter, &parent->children, list) { 495 if (strncmp(iter->name, name, len) == 0) { 496 return iter; 497 } 498 } 499 500 return NULL; 501 } 502 503 static MTPObject *usb_mtp_object_lookup_id(MTPState *s, int64_t id) 504 { 505 MTPObject *iter; 506 507 QTAILQ_FOREACH(iter, &s->objects, next) { 508 if (iter->watchid == id) { 509 return iter; 510 } 511 } 512 513 return NULL; 514 } 515 516 static void file_monitor_event(int64_t id, 517 QFileMonitorEvent ev, 518 const char *name, 519 void *opaque) 520 { 521 MTPState *s = opaque; 522 MTPObject *parent = usb_mtp_object_lookup_id(s, id); 523 MTPMonEntry *entry = NULL; 524 MTPObject *o; 525 526 if (!parent) { 527 return; 528 } 529 530 switch (ev) { 531 case QFILE_MONITOR_EVENT_CREATED: 532 if (usb_mtp_object_lookup_name(parent, name, -1)) { 533 /* Duplicate create event */ 534 return; 535 } 536 entry = g_new0(MTPMonEntry, 1); 537 entry->handle = s->next_handle; 538 entry->event = EVT_OBJ_ADDED; 539 o = usb_mtp_add_child(s, parent, name); 540 if (!o) { 541 g_free(entry); 542 return; 543 } 544 trace_usb_mtp_file_monitor_event(s->dev.addr, name, "Obj Added"); 545 break; 546 547 case QFILE_MONITOR_EVENT_DELETED: 548 /* 549 * The kernel issues a IN_IGNORED event 550 * when a dir containing a watchpoint is 551 * deleted, so we don't have to delete the 552 * watchpoint 553 */ 554 o = usb_mtp_object_lookup_name(parent, name, -1); 555 if (!o) { 556 return; 557 } 558 entry = g_new0(MTPMonEntry, 1); 559 entry->handle = o->handle; 560 entry->event = EVT_OBJ_REMOVED; 561 trace_usb_mtp_file_monitor_event(s->dev.addr, o->path, "Obj Deleted"); 562 usb_mtp_object_free(s, o); 563 break; 564 565 case QFILE_MONITOR_EVENT_MODIFIED: 566 o = usb_mtp_object_lookup_name(parent, name, -1); 567 if (!o) { 568 return; 569 } 570 entry = g_new0(MTPMonEntry, 1); 571 entry->handle = o->handle; 572 entry->event = EVT_OBJ_INFO_CHANGED; 573 trace_usb_mtp_file_monitor_event(s->dev.addr, o->path, "Obj Modified"); 574 break; 575 576 case QFILE_MONITOR_EVENT_IGNORED: 577 trace_usb_mtp_file_monitor_event(s->dev.addr, parent->path, 578 "Obj parent dir ignored"); 579 break; 580 581 case QFILE_MONITOR_EVENT_ATTRIBUTES: 582 break; 583 584 default: 585 g_assert_not_reached(); 586 } 587 588 if (entry) { 589 QTAILQ_INSERT_HEAD(&s->events, entry, next); 590 } 591 } 592 593 static void usb_mtp_file_monitor_cleanup(MTPState *s) 594 { 595 MTPMonEntry *e, *p; 596 597 QTAILQ_FOREACH_SAFE(e, &s->events, next, p) { 598 QTAILQ_REMOVE(&s->events, e, next); 599 g_free(e); 600 } 601 602 qemu_file_monitor_free(s->file_monitor); 603 s->file_monitor = NULL; 604 } 605 606 607 static void usb_mtp_object_readdir(MTPState *s, MTPObject *o) 608 { 609 struct dirent *entry; 610 DIR *dir; 611 int fd; 612 Error *err = NULL; 613 614 if (o->have_children) { 615 return; 616 } 617 o->have_children = true; 618 619 fd = open(o->path, O_DIRECTORY | O_CLOEXEC | O_NOFOLLOW); 620 if (fd < 0) { 621 return; 622 } 623 dir = fdopendir(fd); 624 if (!dir) { 625 close(fd); 626 return; 627 } 628 629 if (s->file_monitor) { 630 int64_t id = qemu_file_monitor_add_watch(s->file_monitor, o->path, NULL, 631 file_monitor_event, s, &err); 632 if (id == -1) { 633 error_reportf_err(err, 634 "usb-mtp: failed to add watch for %s: ", 635 o->path); 636 } else { 637 trace_usb_mtp_file_monitor_event(s->dev.addr, o->path, 638 "Watch Added"); 639 o->watchid = id; 640 } 641 } 642 643 while ((entry = readdir(dir)) != NULL) { 644 usb_mtp_add_child(s, o, entry->d_name); 645 } 646 closedir(dir); 647 } 648 649 /* ----------------------------------------------------------------------- */ 650 651 static MTPData *usb_mtp_data_alloc(MTPControl *c) 652 { 653 MTPData *data = g_new0(MTPData, 1); 654 655 data->code = c->code; 656 data->trans = c->trans; 657 data->fd = -1; 658 data->first = true; 659 return data; 660 } 661 662 static void usb_mtp_data_free(MTPData *data) 663 { 664 if (data == NULL) { 665 return; 666 } 667 if (data->fd != -1) { 668 close(data->fd); 669 } 670 g_free(data->data); 671 g_free(data); 672 } 673 674 static void usb_mtp_realloc(MTPData *data, uint32_t bytes) 675 { 676 if (data->length + bytes <= data->alloc) { 677 return; 678 } 679 data->alloc = (data->length + bytes + 0xff) & ~0xff; 680 data->data = g_realloc(data->data, data->alloc); 681 } 682 683 static void usb_mtp_add_u8(MTPData *data, uint8_t val) 684 { 685 usb_mtp_realloc(data, 1); 686 data->data[data->length++] = val; 687 } 688 689 static void usb_mtp_add_u16(MTPData *data, uint16_t val) 690 { 691 usb_mtp_realloc(data, 2); 692 data->data[data->length++] = (val >> 0) & 0xff; 693 data->data[data->length++] = (val >> 8) & 0xff; 694 } 695 696 static void usb_mtp_add_u32(MTPData *data, uint32_t val) 697 { 698 usb_mtp_realloc(data, 4); 699 data->data[data->length++] = (val >> 0) & 0xff; 700 data->data[data->length++] = (val >> 8) & 0xff; 701 data->data[data->length++] = (val >> 16) & 0xff; 702 data->data[data->length++] = (val >> 24) & 0xff; 703 } 704 705 static void usb_mtp_add_u64(MTPData *data, uint64_t val) 706 { 707 usb_mtp_realloc(data, 8); 708 data->data[data->length++] = (val >> 0) & 0xff; 709 data->data[data->length++] = (val >> 8) & 0xff; 710 data->data[data->length++] = (val >> 16) & 0xff; 711 data->data[data->length++] = (val >> 24) & 0xff; 712 data->data[data->length++] = (val >> 32) & 0xff; 713 data->data[data->length++] = (val >> 40) & 0xff; 714 data->data[data->length++] = (val >> 48) & 0xff; 715 data->data[data->length++] = (val >> 56) & 0xff; 716 } 717 718 static void usb_mtp_add_u16_array(MTPData *data, uint32_t len, 719 const uint16_t *vals) 720 { 721 int i; 722 723 usb_mtp_add_u32(data, len); 724 for (i = 0; i < len; i++) { 725 usb_mtp_add_u16(data, vals[i]); 726 } 727 } 728 729 static void usb_mtp_add_u32_array(MTPData *data, uint32_t len, 730 const uint32_t *vals) 731 { 732 int i; 733 734 usb_mtp_add_u32(data, len); 735 for (i = 0; i < len; i++) { 736 usb_mtp_add_u32(data, vals[i]); 737 } 738 } 739 740 static void usb_mtp_add_wstr(MTPData *data, const wchar_t *str) 741 { 742 uint32_t len = wcslen(str); 743 int i; 744 745 if (len > 0) { 746 len++; /* include terminating L'\0' */ 747 } 748 749 usb_mtp_add_u8(data, len); 750 for (i = 0; i < len; i++) { 751 usb_mtp_add_u16(data, str[i]); 752 } 753 } 754 755 static void usb_mtp_add_str(MTPData *data, const char *str) 756 { 757 uint32_t len = strlen(str)+1; 758 wchar_t *wstr = g_new(wchar_t, len); 759 size_t ret; 760 761 ret = mbstowcs(wstr, str, len); 762 if (ret == -1) { 763 usb_mtp_add_wstr(data, L"Oops"); 764 } else { 765 usb_mtp_add_wstr(data, wstr); 766 } 767 768 g_free(wstr); 769 } 770 771 static void usb_mtp_add_time(MTPData *data, time_t time) 772 { 773 g_autoptr(GDateTime) then = g_date_time_new_from_unix_utc(time); 774 g_autofree char *thenstr = g_date_time_format(then, "%Y%m%dT%H%M%S"); 775 usb_mtp_add_str(data, thenstr); 776 } 777 778 /* ----------------------------------------------------------------------- */ 779 780 static void usb_mtp_queue_result(MTPState *s, uint16_t code, uint32_t trans, 781 int argc, uint32_t arg0, uint32_t arg1, 782 uint32_t arg2) 783 { 784 MTPControl *c = g_new0(MTPControl, 1); 785 786 c->code = code; 787 c->trans = trans; 788 c->argc = argc; 789 if (argc > 0) { 790 c->argv[0] = arg0; 791 } 792 if (argc > 1) { 793 c->argv[1] = arg1; 794 } 795 if (argc > 2) { 796 c->argv[2] = arg2; 797 } 798 799 assert(s->result == NULL); 800 s->result = c; 801 } 802 803 /* ----------------------------------------------------------------------- */ 804 805 static MTPData *usb_mtp_get_device_info(MTPState *s, MTPControl *c) 806 { 807 static const uint16_t ops[] = { 808 CMD_GET_DEVICE_INFO, 809 CMD_OPEN_SESSION, 810 CMD_CLOSE_SESSION, 811 CMD_GET_STORAGE_IDS, 812 CMD_GET_STORAGE_INFO, 813 CMD_GET_NUM_OBJECTS, 814 CMD_GET_OBJECT_HANDLES, 815 CMD_GET_OBJECT_INFO, 816 CMD_DELETE_OBJECT, 817 CMD_SEND_OBJECT_INFO, 818 CMD_SEND_OBJECT, 819 CMD_GET_OBJECT, 820 CMD_GET_PARTIAL_OBJECT, 821 CMD_GET_OBJECT_PROPS_SUPPORTED, 822 CMD_GET_OBJECT_PROP_DESC, 823 CMD_GET_OBJECT_PROP_VALUE, 824 }; 825 static const uint16_t fmt[] = { 826 FMT_UNDEFINED_OBJECT, 827 FMT_ASSOCIATION, 828 }; 829 MTPData *d = usb_mtp_data_alloc(c); 830 831 trace_usb_mtp_op_get_device_info(s->dev.addr); 832 833 usb_mtp_add_u16(d, 100); 834 usb_mtp_add_u32(d, 0x00000006); 835 usb_mtp_add_u16(d, 0x0064); 836 usb_mtp_add_wstr(d, L""); 837 usb_mtp_add_u16(d, 0x0000); 838 839 usb_mtp_add_u16_array(d, ARRAY_SIZE(ops), ops); 840 usb_mtp_add_u16_array(d, 0, NULL); 841 usb_mtp_add_u16_array(d, 0, NULL); 842 usb_mtp_add_u16_array(d, 0, NULL); 843 usb_mtp_add_u16_array(d, ARRAY_SIZE(fmt), fmt); 844 845 usb_mtp_add_wstr(d, L"" MTP_MANUFACTURER); 846 usb_mtp_add_wstr(d, L"" MTP_PRODUCT); 847 usb_mtp_add_wstr(d, L"0.1"); 848 usb_mtp_add_wstr(d, L"0123456789abcdef0123456789abcdef"); 849 850 return d; 851 } 852 853 static MTPData *usb_mtp_get_storage_ids(MTPState *s, MTPControl *c) 854 { 855 static const uint32_t ids[] = { 856 QEMU_STORAGE_ID, 857 }; 858 MTPData *d = usb_mtp_data_alloc(c); 859 860 trace_usb_mtp_op_get_storage_ids(s->dev.addr); 861 862 usb_mtp_add_u32_array(d, ARRAY_SIZE(ids), ids); 863 864 return d; 865 } 866 867 static MTPData *usb_mtp_get_storage_info(MTPState *s, MTPControl *c) 868 { 869 MTPData *d = usb_mtp_data_alloc(c); 870 struct statvfs buf; 871 int rc; 872 873 trace_usb_mtp_op_get_storage_info(s->dev.addr); 874 875 if (FLAG_SET(s, MTP_FLAG_WRITABLE)) { 876 usb_mtp_add_u16(d, 0x0003); 877 usb_mtp_add_u16(d, 0x0002); 878 usb_mtp_add_u16(d, 0x0000); 879 } else { 880 usb_mtp_add_u16(d, 0x0001); 881 usb_mtp_add_u16(d, 0x0002); 882 usb_mtp_add_u16(d, 0x0001); 883 } 884 885 rc = statvfs(s->root, &buf); 886 if (rc == 0) { 887 usb_mtp_add_u64(d, (uint64_t)buf.f_frsize * buf.f_blocks); 888 usb_mtp_add_u64(d, (uint64_t)buf.f_frsize * buf.f_bavail); 889 usb_mtp_add_u32(d, buf.f_ffree); 890 } else { 891 usb_mtp_add_u64(d, 0xffffffff); 892 usb_mtp_add_u64(d, 0xffffffff); 893 usb_mtp_add_u32(d, 0xffffffff); 894 } 895 896 usb_mtp_add_str(d, s->desc); 897 usb_mtp_add_wstr(d, L"123456789abcdef"); 898 return d; 899 } 900 901 static MTPData *usb_mtp_get_object_handles(MTPState *s, MTPControl *c, 902 MTPObject *o) 903 { 904 MTPData *d = usb_mtp_data_alloc(c); 905 uint32_t i = 0; 906 g_autofree uint32_t *handles = g_new(uint32_t, o->nchildren); 907 MTPObject *iter; 908 909 trace_usb_mtp_op_get_object_handles(s->dev.addr, o->handle, o->path); 910 911 QLIST_FOREACH(iter, &o->children, list) { 912 handles[i++] = iter->handle; 913 } 914 assert(i == o->nchildren); 915 usb_mtp_add_u32_array(d, o->nchildren, handles); 916 917 return d; 918 } 919 920 static MTPData *usb_mtp_get_object_info(MTPState *s, MTPControl *c, 921 MTPObject *o) 922 { 923 MTPData *d = usb_mtp_data_alloc(c); 924 925 trace_usb_mtp_op_get_object_info(s->dev.addr, o->handle, o->path); 926 927 usb_mtp_add_u32(d, QEMU_STORAGE_ID); 928 usb_mtp_add_u16(d, o->format); 929 usb_mtp_add_u16(d, 0); 930 931 if (o->stat.st_size > 0xFFFFFFFF) { 932 usb_mtp_add_u32(d, 0xFFFFFFFF); 933 } else { 934 usb_mtp_add_u32(d, o->stat.st_size); 935 } 936 937 usb_mtp_add_u16(d, 0); 938 usb_mtp_add_u32(d, 0); 939 usb_mtp_add_u32(d, 0); 940 usb_mtp_add_u32(d, 0); 941 usb_mtp_add_u32(d, 0); 942 usb_mtp_add_u32(d, 0); 943 usb_mtp_add_u32(d, 0); 944 945 if (o->parent) { 946 usb_mtp_add_u32(d, o->parent->handle); 947 } else { 948 usb_mtp_add_u32(d, 0); 949 } 950 if (o->format == FMT_ASSOCIATION) { 951 usb_mtp_add_u16(d, 0x0001); 952 usb_mtp_add_u32(d, 0x00000001); 953 usb_mtp_add_u32(d, 0); 954 } else { 955 usb_mtp_add_u16(d, 0); 956 usb_mtp_add_u32(d, 0); 957 usb_mtp_add_u32(d, 0); 958 } 959 960 usb_mtp_add_str(d, o->name); 961 usb_mtp_add_time(d, o->stat.st_ctime); 962 usb_mtp_add_time(d, o->stat.st_mtime); 963 usb_mtp_add_wstr(d, L""); 964 965 return d; 966 } 967 968 static MTPData *usb_mtp_get_object(MTPState *s, MTPControl *c, 969 MTPObject *o) 970 { 971 MTPData *d = usb_mtp_data_alloc(c); 972 973 trace_usb_mtp_op_get_object(s->dev.addr, o->handle, o->path); 974 975 d->fd = open(o->path, O_RDONLY | O_CLOEXEC | O_NOFOLLOW); 976 if (d->fd == -1) { 977 usb_mtp_data_free(d); 978 return NULL; 979 } 980 d->length = o->stat.st_size; 981 d->alloc = 512; 982 d->data = g_malloc(d->alloc); 983 return d; 984 } 985 986 static MTPData *usb_mtp_get_partial_object(MTPState *s, MTPControl *c, 987 MTPObject *o) 988 { 989 MTPData *d; 990 off_t offset; 991 992 if (c->argc <= 2) { 993 return NULL; 994 } 995 trace_usb_mtp_op_get_partial_object(s->dev.addr, o->handle, o->path, 996 c->argv[1], c->argv[2]); 997 998 d = usb_mtp_data_alloc(c); 999 d->fd = open(o->path, O_RDONLY | O_CLOEXEC | O_NOFOLLOW); 1000 if (d->fd == -1) { 1001 usb_mtp_data_free(d); 1002 return NULL; 1003 } 1004 1005 offset = c->argv[1]; 1006 if (offset > o->stat.st_size) { 1007 offset = o->stat.st_size; 1008 } 1009 if (lseek(d->fd, offset, SEEK_SET) < 0) { 1010 usb_mtp_data_free(d); 1011 return NULL; 1012 } 1013 1014 d->length = c->argv[2]; 1015 if (d->length > o->stat.st_size - offset) { 1016 d->length = o->stat.st_size - offset; 1017 } 1018 1019 return d; 1020 } 1021 1022 static MTPData *usb_mtp_get_object_props_supported(MTPState *s, MTPControl *c) 1023 { 1024 static const uint16_t props[] = { 1025 PROP_STORAGE_ID, 1026 PROP_OBJECT_FORMAT, 1027 PROP_OBJECT_COMPRESSED_SIZE, 1028 PROP_PARENT_OBJECT, 1029 PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER, 1030 PROP_NAME, 1031 }; 1032 MTPData *d = usb_mtp_data_alloc(c); 1033 usb_mtp_add_u16_array(d, ARRAY_SIZE(props), props); 1034 1035 return d; 1036 } 1037 1038 static MTPData *usb_mtp_get_object_prop_desc(MTPState *s, MTPControl *c) 1039 { 1040 MTPData *d = usb_mtp_data_alloc(c); 1041 switch (c->argv[0]) { 1042 case PROP_STORAGE_ID: 1043 usb_mtp_add_u16(d, PROP_STORAGE_ID); 1044 usb_mtp_add_u16(d, DATA_TYPE_UINT32); 1045 usb_mtp_add_u8(d, 0x00); 1046 usb_mtp_add_u32(d, 0x00000000); 1047 usb_mtp_add_u32(d, 0x00000000); 1048 usb_mtp_add_u8(d, 0x00); 1049 break; 1050 case PROP_OBJECT_FORMAT: 1051 usb_mtp_add_u16(d, PROP_OBJECT_FORMAT); 1052 usb_mtp_add_u16(d, DATA_TYPE_UINT16); 1053 usb_mtp_add_u8(d, 0x00); 1054 usb_mtp_add_u16(d, 0x0000); 1055 usb_mtp_add_u32(d, 0x00000000); 1056 usb_mtp_add_u8(d, 0x00); 1057 break; 1058 case PROP_OBJECT_COMPRESSED_SIZE: 1059 usb_mtp_add_u16(d, PROP_OBJECT_COMPRESSED_SIZE); 1060 usb_mtp_add_u16(d, DATA_TYPE_UINT64); 1061 usb_mtp_add_u8(d, 0x00); 1062 usb_mtp_add_u64(d, 0x0000000000000000); 1063 usb_mtp_add_u32(d, 0x00000000); 1064 usb_mtp_add_u8(d, 0x00); 1065 break; 1066 case PROP_PARENT_OBJECT: 1067 usb_mtp_add_u16(d, PROP_PARENT_OBJECT); 1068 usb_mtp_add_u16(d, DATA_TYPE_UINT32); 1069 usb_mtp_add_u8(d, 0x00); 1070 usb_mtp_add_u32(d, 0x00000000); 1071 usb_mtp_add_u32(d, 0x00000000); 1072 usb_mtp_add_u8(d, 0x00); 1073 break; 1074 case PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER: 1075 usb_mtp_add_u16(d, PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER); 1076 usb_mtp_add_u16(d, DATA_TYPE_UINT128); 1077 usb_mtp_add_u8(d, 0x00); 1078 usb_mtp_add_u64(d, 0x0000000000000000); 1079 usb_mtp_add_u64(d, 0x0000000000000000); 1080 usb_mtp_add_u32(d, 0x00000000); 1081 usb_mtp_add_u8(d, 0x00); 1082 break; 1083 case PROP_NAME: 1084 usb_mtp_add_u16(d, PROP_NAME); 1085 usb_mtp_add_u16(d, DATA_TYPE_STRING); 1086 usb_mtp_add_u8(d, 0x00); 1087 usb_mtp_add_u8(d, 0x00); 1088 usb_mtp_add_u32(d, 0x00000000); 1089 usb_mtp_add_u8(d, 0x00); 1090 break; 1091 default: 1092 usb_mtp_data_free(d); 1093 return NULL; 1094 } 1095 1096 return d; 1097 } 1098 1099 static MTPData *usb_mtp_get_object_prop_value(MTPState *s, MTPControl *c, 1100 MTPObject *o) 1101 { 1102 MTPData *d = usb_mtp_data_alloc(c); 1103 switch (c->argv[1]) { 1104 case PROP_STORAGE_ID: 1105 usb_mtp_add_u32(d, QEMU_STORAGE_ID); 1106 break; 1107 case PROP_OBJECT_FORMAT: 1108 usb_mtp_add_u16(d, o->format); 1109 break; 1110 case PROP_OBJECT_COMPRESSED_SIZE: 1111 usb_mtp_add_u64(d, o->stat.st_size); 1112 break; 1113 case PROP_PARENT_OBJECT: 1114 if (o->parent == NULL) { 1115 usb_mtp_add_u32(d, 0x00000000); 1116 } else { 1117 usb_mtp_add_u32(d, o->parent->handle); 1118 } 1119 break; 1120 case PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER: 1121 /* Should be persistent between sessions, 1122 * but using our objedt ID is "good enough" 1123 * for now */ 1124 usb_mtp_add_u64(d, 0x0000000000000000); 1125 usb_mtp_add_u64(d, o->handle); 1126 break; 1127 case PROP_NAME: 1128 usb_mtp_add_str(d, o->name); 1129 break; 1130 default: 1131 usb_mtp_data_free(d); 1132 return NULL; 1133 } 1134 1135 return d; 1136 } 1137 1138 /* 1139 * Return values when object @o is deleted. 1140 * If at least one of the deletions succeeded, 1141 * DELETE_SUCCESS is set and if at least one 1142 * of the deletions failed, DELETE_FAILURE is 1143 * set. Both bits being set (DELETE_PARTIAL) 1144 * signifies a RES_PARTIAL_DELETE being sent 1145 * back to the initiator. 1146 */ 1147 enum { 1148 DELETE_SUCCESS = (1 << 0), 1149 DELETE_FAILURE = (1 << 1), 1150 DELETE_PARTIAL = (DELETE_FAILURE | DELETE_SUCCESS), 1151 }; 1152 1153 static int usb_mtp_deletefn(MTPState *s, MTPObject *o, uint32_t trans) 1154 { 1155 MTPObject *iter, *iter2; 1156 int ret = 0; 1157 1158 /* 1159 * TODO: Add support for Protection Status 1160 */ 1161 1162 QLIST_FOREACH(iter, &o->children, list) { 1163 if (iter->format == FMT_ASSOCIATION) { 1164 QLIST_FOREACH(iter2, &iter->children, list) { 1165 ret |= usb_mtp_deletefn(s, iter2, trans); 1166 } 1167 } 1168 } 1169 1170 if (o->format == FMT_UNDEFINED_OBJECT) { 1171 if (remove(o->path)) { 1172 ret |= DELETE_FAILURE; 1173 } else { 1174 usb_mtp_object_free(s, o); 1175 ret |= DELETE_SUCCESS; 1176 } 1177 } else if (o->format == FMT_ASSOCIATION) { 1178 if (rmdir(o->path)) { 1179 ret |= DELETE_FAILURE; 1180 } else { 1181 usb_mtp_object_free(s, o); 1182 ret |= DELETE_SUCCESS; 1183 } 1184 } 1185 1186 return ret; 1187 } 1188 1189 static void usb_mtp_object_delete(MTPState *s, uint32_t handle, 1190 uint32_t format_code, uint32_t trans) 1191 { 1192 MTPObject *o; 1193 int ret; 1194 1195 /* Return error if store is read-only */ 1196 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) { 1197 usb_mtp_queue_result(s, RES_STORE_READ_ONLY, 1198 trans, 0, 0, 0, 0); 1199 return; 1200 } 1201 1202 if (format_code != 0) { 1203 usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED, 1204 trans, 0, 0, 0, 0); 1205 return; 1206 } 1207 1208 if (handle == 0xFFFFFFF) { 1209 o = QTAILQ_FIRST(&s->objects); 1210 } else { 1211 o = usb_mtp_object_lookup(s, handle); 1212 } 1213 if (o == NULL) { 1214 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1215 trans, 0, 0, 0, 0); 1216 return; 1217 } 1218 1219 ret = usb_mtp_deletefn(s, o, trans); 1220 switch (ret) { 1221 case DELETE_SUCCESS: 1222 usb_mtp_queue_result(s, RES_OK, trans, 1223 0, 0, 0, 0); 1224 break; 1225 case DELETE_FAILURE: 1226 usb_mtp_queue_result(s, RES_PARTIAL_DELETE, 1227 trans, 0, 0, 0, 0); 1228 break; 1229 case DELETE_PARTIAL: 1230 usb_mtp_queue_result(s, RES_PARTIAL_DELETE, 1231 trans, 0, 0, 0, 0); 1232 break; 1233 default: 1234 g_assert_not_reached(); 1235 } 1236 } 1237 1238 static void usb_mtp_command(MTPState *s, MTPControl *c) 1239 { 1240 MTPData *data_in = NULL; 1241 MTPObject *o = NULL; 1242 uint32_t nres = 0, res0 = 0; 1243 Error *err = NULL; 1244 1245 /* sanity checks */ 1246 if (c->code >= CMD_CLOSE_SESSION && s->session == 0) { 1247 usb_mtp_queue_result(s, RES_SESSION_NOT_OPEN, 1248 c->trans, 0, 0, 0, 0); 1249 return; 1250 } 1251 1252 /* process commands */ 1253 switch (c->code) { 1254 case CMD_GET_DEVICE_INFO: 1255 data_in = usb_mtp_get_device_info(s, c); 1256 break; 1257 case CMD_OPEN_SESSION: 1258 if (s->session) { 1259 usb_mtp_queue_result(s, RES_SESSION_ALREADY_OPEN, 1260 c->trans, 1, s->session, 0, 0); 1261 return; 1262 } 1263 if (c->argv[0] == 0) { 1264 usb_mtp_queue_result(s, RES_INVALID_PARAMETER, 1265 c->trans, 0, 0, 0, 0); 1266 return; 1267 } 1268 trace_usb_mtp_op_open_session(s->dev.addr); 1269 s->session = c->argv[0]; 1270 usb_mtp_object_alloc(s, s->next_handle++, NULL, s->root); 1271 1272 s->file_monitor = qemu_file_monitor_new(&err); 1273 if (err) { 1274 error_reportf_err(err, 1275 "usb-mtp: file monitoring init failed: "); 1276 } else { 1277 QTAILQ_INIT(&s->events); 1278 } 1279 break; 1280 case CMD_CLOSE_SESSION: 1281 trace_usb_mtp_op_close_session(s->dev.addr); 1282 s->session = 0; 1283 s->next_handle = 0; 1284 usb_mtp_file_monitor_cleanup(s); 1285 usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects)); 1286 assert(QTAILQ_EMPTY(&s->objects)); 1287 break; 1288 case CMD_GET_STORAGE_IDS: 1289 data_in = usb_mtp_get_storage_ids(s, c); 1290 break; 1291 case CMD_GET_STORAGE_INFO: 1292 if (c->argv[0] != QEMU_STORAGE_ID && 1293 c->argv[0] != 0xffffffff) { 1294 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID, 1295 c->trans, 0, 0, 0, 0); 1296 return; 1297 } 1298 data_in = usb_mtp_get_storage_info(s, c); 1299 break; 1300 case CMD_GET_NUM_OBJECTS: 1301 case CMD_GET_OBJECT_HANDLES: 1302 if (c->argv[0] != QEMU_STORAGE_ID && 1303 c->argv[0] != 0xffffffff) { 1304 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID, 1305 c->trans, 0, 0, 0, 0); 1306 return; 1307 } 1308 if (c->argv[1] != 0x00000000) { 1309 usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED, 1310 c->trans, 0, 0, 0, 0); 1311 return; 1312 } 1313 if (c->argv[2] == 0x00000000 || 1314 c->argv[2] == 0xffffffff) { 1315 o = QTAILQ_FIRST(&s->objects); 1316 } else { 1317 o = usb_mtp_object_lookup(s, c->argv[2]); 1318 } 1319 if (o == NULL) { 1320 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1321 c->trans, 0, 0, 0, 0); 1322 return; 1323 } 1324 if (o->format != FMT_ASSOCIATION) { 1325 usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT, 1326 c->trans, 0, 0, 0, 0); 1327 return; 1328 } 1329 usb_mtp_object_readdir(s, o); 1330 if (c->code == CMD_GET_NUM_OBJECTS) { 1331 trace_usb_mtp_op_get_num_objects(s->dev.addr, o->handle, o->path); 1332 nres = 1; 1333 res0 = o->nchildren; 1334 } else { 1335 data_in = usb_mtp_get_object_handles(s, c, o); 1336 } 1337 break; 1338 case CMD_GET_OBJECT_INFO: 1339 o = usb_mtp_object_lookup(s, c->argv[0]); 1340 if (o == NULL) { 1341 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1342 c->trans, 0, 0, 0, 0); 1343 return; 1344 } 1345 data_in = usb_mtp_get_object_info(s, c, o); 1346 break; 1347 case CMD_GET_OBJECT: 1348 o = usb_mtp_object_lookup(s, c->argv[0]); 1349 if (o == NULL) { 1350 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1351 c->trans, 0, 0, 0, 0); 1352 return; 1353 } 1354 if (o->format == FMT_ASSOCIATION) { 1355 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1356 c->trans, 0, 0, 0, 0); 1357 return; 1358 } 1359 data_in = usb_mtp_get_object(s, c, o); 1360 if (data_in == NULL) { 1361 usb_mtp_queue_result(s, RES_GENERAL_ERROR, 1362 c->trans, 0, 0, 0, 0); 1363 return; 1364 } 1365 break; 1366 case CMD_DELETE_OBJECT: 1367 usb_mtp_object_delete(s, c->argv[0], c->argv[1], c->trans); 1368 return; 1369 case CMD_GET_PARTIAL_OBJECT: 1370 o = usb_mtp_object_lookup(s, c->argv[0]); 1371 if (o == NULL) { 1372 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1373 c->trans, 0, 0, 0, 0); 1374 return; 1375 } 1376 if (o->format == FMT_ASSOCIATION) { 1377 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1378 c->trans, 0, 0, 0, 0); 1379 return; 1380 } 1381 data_in = usb_mtp_get_partial_object(s, c, o); 1382 if (data_in == NULL) { 1383 usb_mtp_queue_result(s, RES_GENERAL_ERROR, 1384 c->trans, 0, 0, 0, 0); 1385 return; 1386 } 1387 nres = 1; 1388 res0 = data_in->length; 1389 break; 1390 case CMD_SEND_OBJECT_INFO: 1391 /* Return error if store is read-only */ 1392 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) { 1393 usb_mtp_queue_result(s, RES_STORE_READ_ONLY, 1394 c->trans, 0, 0, 0, 0); 1395 } else if (c->argv[0] && (c->argv[0] != QEMU_STORAGE_ID)) { 1396 /* First parameter points to storage id or is 0 */ 1397 usb_mtp_queue_result(s, RES_STORE_NOT_AVAILABLE, c->trans, 1398 0, 0, 0, 0); 1399 } else if (c->argv[1] && !c->argv[0]) { 1400 /* If second parameter is specified, first must also be specified */ 1401 usb_mtp_queue_result(s, RES_DESTINATION_UNSUPPORTED, c->trans, 1402 0, 0, 0, 0); 1403 } else { 1404 uint32_t handle = c->argv[1]; 1405 if (handle == 0xFFFFFFFF || handle == 0) { 1406 /* root object */ 1407 o = QTAILQ_FIRST(&s->objects); 1408 } else { 1409 o = usb_mtp_object_lookup(s, handle); 1410 } 1411 if (o == NULL) { 1412 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, c->trans, 1413 0, 0, 0, 0); 1414 } else if (o->format != FMT_ASSOCIATION) { 1415 usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT, c->trans, 1416 0, 0, 0, 0); 1417 } 1418 } 1419 if (o) { 1420 s->dataset.parent_handle = o->handle; 1421 } 1422 s->data_out = usb_mtp_data_alloc(c); 1423 return; 1424 case CMD_SEND_OBJECT: 1425 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) { 1426 usb_mtp_queue_result(s, RES_STORE_READ_ONLY, 1427 c->trans, 0, 0, 0, 0); 1428 return; 1429 } 1430 if (!s->write_pending) { 1431 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, 1432 c->trans, 0, 0, 0, 0); 1433 return; 1434 } 1435 s->data_out = usb_mtp_data_alloc(c); 1436 return; 1437 case CMD_GET_OBJECT_PROPS_SUPPORTED: 1438 if (c->argv[0] != FMT_UNDEFINED_OBJECT && 1439 c->argv[0] != FMT_ASSOCIATION) { 1440 usb_mtp_queue_result(s, RES_INVALID_OBJECT_FORMAT_CODE, 1441 c->trans, 0, 0, 0, 0); 1442 return; 1443 } 1444 data_in = usb_mtp_get_object_props_supported(s, c); 1445 break; 1446 case CMD_GET_OBJECT_PROP_DESC: 1447 if (c->argv[1] != FMT_UNDEFINED_OBJECT && 1448 c->argv[1] != FMT_ASSOCIATION) { 1449 usb_mtp_queue_result(s, RES_INVALID_OBJECT_FORMAT_CODE, 1450 c->trans, 0, 0, 0, 0); 1451 return; 1452 } 1453 data_in = usb_mtp_get_object_prop_desc(s, c); 1454 if (data_in == NULL) { 1455 usb_mtp_queue_result(s, RES_INVALID_OBJECT_PROP_CODE, 1456 c->trans, 0, 0, 0, 0); 1457 return; 1458 } 1459 break; 1460 case CMD_GET_OBJECT_PROP_VALUE: 1461 o = usb_mtp_object_lookup(s, c->argv[0]); 1462 if (o == NULL) { 1463 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, 1464 c->trans, 0, 0, 0, 0); 1465 return; 1466 } 1467 data_in = usb_mtp_get_object_prop_value(s, c, o); 1468 if (data_in == NULL) { 1469 usb_mtp_queue_result(s, RES_INVALID_OBJECT_PROP_CODE, 1470 c->trans, 0, 0, 0, 0); 1471 return; 1472 } 1473 break; 1474 default: 1475 trace_usb_mtp_op_unknown(s->dev.addr, c->code); 1476 usb_mtp_queue_result(s, RES_OPERATION_NOT_SUPPORTED, 1477 c->trans, 0, 0, 0, 0); 1478 return; 1479 } 1480 1481 /* return results on success */ 1482 if (data_in) { 1483 assert(s->data_in == NULL); 1484 s->data_in = data_in; 1485 } 1486 usb_mtp_queue_result(s, RES_OK, c->trans, nres, res0, 0, 0); 1487 } 1488 1489 /* ----------------------------------------------------------------------- */ 1490 1491 static void usb_mtp_handle_reset(USBDevice *dev) 1492 { 1493 MTPState *s = USB_MTP(dev); 1494 1495 trace_usb_mtp_reset(s->dev.addr); 1496 1497 usb_mtp_file_monitor_cleanup(s); 1498 usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects)); 1499 s->session = 0; 1500 usb_mtp_data_free(s->data_in); 1501 s->data_in = NULL; 1502 usb_mtp_data_free(s->data_out); 1503 s->data_out = NULL; 1504 g_free(s->result); 1505 s->result = NULL; 1506 } 1507 1508 static void usb_mtp_handle_control(USBDevice *dev, USBPacket *p, 1509 int request, int value, int index, 1510 int length, uint8_t *data) 1511 { 1512 int ret; 1513 MTPState *s = USB_MTP(dev); 1514 uint16_t *event = (uint16_t *)data; 1515 1516 switch (request) { 1517 case ClassInterfaceOutRequest | 0x64: 1518 if (*event == EVT_CANCEL_TRANSACTION) { 1519 g_free(s->result); 1520 s->result = NULL; 1521 usb_mtp_data_free(s->data_in); 1522 s->data_in = NULL; 1523 if (s->write_pending) { 1524 g_free(s->dataset.filename); 1525 s->write_pending = false; 1526 s->dataset.size = 0; 1527 } 1528 usb_mtp_data_free(s->data_out); 1529 s->data_out = NULL; 1530 } else { 1531 p->status = USB_RET_STALL; 1532 } 1533 break; 1534 default: 1535 ret = usb_desc_handle_control(dev, p, request, 1536 value, index, length, data); 1537 if (ret >= 0) { 1538 return; 1539 } 1540 } 1541 1542 trace_usb_mtp_stall(dev->addr, "unknown control request"); 1543 } 1544 1545 static void usb_mtp_cancel_packet(USBDevice *dev, USBPacket *p) 1546 { 1547 /* we don't use async packets, so this should never be called */ 1548 fprintf(stderr, "%s\n", __func__); 1549 } 1550 1551 static char *utf16_to_str(uint8_t len, uint8_t *str16) 1552 { 1553 wchar_t *wstr = g_new0(wchar_t, len + 1); 1554 int count, dlen; 1555 char *dest; 1556 1557 for (count = 0; count < len; count++) { 1558 /* FIXME: not working for surrogate pairs */ 1559 wstr[count] = lduw_le_p(str16 + (count * 2)); 1560 } 1561 wstr[count] = 0; 1562 1563 dlen = wcstombs(NULL, wstr, 0) + 1; 1564 dest = g_malloc(dlen); 1565 wcstombs(dest, wstr, dlen); 1566 g_free(wstr); 1567 return dest; 1568 } 1569 1570 /* Wrapper around write, returns 0 on failure */ 1571 static uint64_t write_retry(int fd, void *buf, uint64_t size, off_t offset) 1572 { 1573 uint64_t ret = 0; 1574 1575 if (lseek(fd, offset, SEEK_SET) < 0) { 1576 goto done; 1577 } 1578 1579 ret = qemu_write_full(fd, buf, size); 1580 1581 done: 1582 return ret; 1583 } 1584 1585 static int usb_mtp_update_object(MTPObject *parent, char *name) 1586 { 1587 int ret = 0; 1588 1589 MTPObject *o = 1590 usb_mtp_object_lookup_name(parent, name, strlen(name)); 1591 1592 if (o) { 1593 ret = lstat(o->path, &o->stat); 1594 } 1595 1596 return ret; 1597 } 1598 1599 static void usb_mtp_write_data(MTPState *s, uint32_t handle) 1600 { 1601 MTPData *d = s->data_out; 1602 MTPObject *parent = 1603 usb_mtp_object_lookup(s, s->dataset.parent_handle); 1604 char *path = NULL; 1605 uint64_t rc; 1606 mode_t mask = 0755; 1607 int ret = 0; 1608 1609 assert(d != NULL); 1610 1611 switch (d->write_status) { 1612 case WRITE_START: 1613 if (!parent || !s->write_pending) { 1614 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, d->trans, 1615 0, 0, 0, 0); 1616 return; 1617 } 1618 1619 if (s->dataset.filename) { 1620 path = g_strdup_printf("%s/%s", parent->path, s->dataset.filename); 1621 if (s->dataset.format == FMT_ASSOCIATION) { 1622 ret = g_mkdir(path, mask); 1623 if (!ret) { 1624 usb_mtp_queue_result(s, RES_OK, d->trans, 3, 1625 QEMU_STORAGE_ID, 1626 s->dataset.parent_handle, 1627 handle); 1628 goto close; 1629 } 1630 goto done; 1631 } 1632 1633 d->fd = open(path, O_CREAT | O_WRONLY | 1634 O_CLOEXEC | O_NOFOLLOW, mask & 0666); 1635 if (d->fd == -1) { 1636 ret = 1; 1637 goto done; 1638 } 1639 1640 /* Return success if initiator sent 0 sized data */ 1641 if (!s->dataset.size) { 1642 goto done; 1643 } 1644 if (d->length != MTP_WRITE_BUF_SZ && !d->pending) { 1645 d->write_status = WRITE_END; 1646 } 1647 } 1648 /* fall through */ 1649 case WRITE_CONTINUE: 1650 case WRITE_END: 1651 rc = write_retry(d->fd, d->data, d->data_offset, 1652 d->offset - d->data_offset); 1653 if (rc != d->data_offset) { 1654 ret = 1; 1655 goto done; 1656 } 1657 if (d->write_status != WRITE_END) { 1658 g_free(path); 1659 return; 1660 } else { 1661 /* 1662 * Return an incomplete transfer if file size doesn't match 1663 * for < 4G file or if lstat fails which will result in an incorrect 1664 * file size 1665 */ 1666 if ((s->dataset.size != 0xFFFFFFFF && 1667 d->offset != s->dataset.size) || 1668 usb_mtp_update_object(parent, s->dataset.filename)) { 1669 usb_mtp_queue_result(s, RES_INCOMPLETE_TRANSFER, d->trans, 1670 0, 0, 0, 0); 1671 goto close; 1672 } 1673 } 1674 } 1675 1676 done: 1677 if (ret) { 1678 usb_mtp_queue_result(s, RES_STORE_FULL, d->trans, 1679 0, 0, 0, 0); 1680 } else { 1681 usb_mtp_queue_result(s, RES_OK, d->trans, 1682 0, 0, 0, 0); 1683 } 1684 close: 1685 /* 1686 * The write dataset is kept around and freed only 1687 * on success or if another write request comes in 1688 */ 1689 if (d->fd != -1) { 1690 close(d->fd); 1691 d->fd = -1; 1692 } 1693 g_free(s->dataset.filename); 1694 s->dataset.size = 0; 1695 g_free(path); 1696 s->write_pending = false; 1697 } 1698 1699 static void usb_mtp_write_metadata(MTPState *s, uint64_t dlen) 1700 { 1701 MTPData *d = s->data_out; 1702 ObjectInfo *dataset = (ObjectInfo *)d->data; 1703 char *filename; 1704 MTPObject *o; 1705 MTPObject *p = usb_mtp_object_lookup(s, s->dataset.parent_handle); 1706 uint32_t next_handle = s->next_handle; 1707 size_t filename_chars = dlen - offsetof(ObjectInfo, filename); 1708 1709 /* 1710 * filename is utf-16. We're intentionally doing 1711 * integer division to truncate if malicious guest 1712 * sent an odd number of bytes. 1713 */ 1714 filename_chars /= 2; 1715 1716 assert(!s->write_pending); 1717 assert(p != NULL); 1718 1719 filename = utf16_to_str(MIN(dataset->length, filename_chars), 1720 dataset->filename); 1721 1722 if (strchr(filename, '/')) { 1723 usb_mtp_queue_result(s, RES_PARAMETER_NOT_SUPPORTED, d->trans, 1724 0, 0, 0, 0); 1725 g_free(filename); 1726 return; 1727 } 1728 1729 o = usb_mtp_object_lookup_name(p, filename, -1); 1730 if (o != NULL) { 1731 next_handle = o->handle; 1732 } 1733 1734 s->dataset.filename = filename; 1735 s->dataset.format = dataset->format; 1736 s->dataset.size = dataset->size; 1737 s->write_pending = true; 1738 1739 if (s->dataset.format == FMT_ASSOCIATION) { 1740 usb_mtp_write_data(s, next_handle); 1741 } else { 1742 usb_mtp_queue_result(s, RES_OK, d->trans, 3, QEMU_STORAGE_ID, 1743 s->dataset.parent_handle, next_handle); 1744 } 1745 } 1746 1747 static void usb_mtp_get_data(MTPState *s, mtp_container *container, 1748 USBPacket *p) 1749 { 1750 MTPData *d = s->data_out; 1751 uint64_t dlen; 1752 uint32_t data_len = p->iov.size; 1753 uint64_t total_len; 1754 1755 if (!d) { 1756 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, 0, 1757 0, 0, 0, 0); 1758 return; 1759 } 1760 if (d->first) { 1761 /* Total length of incoming data */ 1762 total_len = cpu_to_le32(container->length) - sizeof(mtp_container); 1763 /* Length of data in this packet */ 1764 data_len -= sizeof(mtp_container); 1765 if (total_len < MTP_WRITE_BUF_SZ) { 1766 usb_mtp_realloc(d, total_len); 1767 d->length += total_len; 1768 } else { 1769 usb_mtp_realloc(d, MTP_WRITE_BUF_SZ - sizeof(mtp_container)); 1770 d->length += MTP_WRITE_BUF_SZ - sizeof(mtp_container); 1771 } 1772 d->offset = 0; 1773 d->first = false; 1774 d->pending = false; 1775 d->data_offset = 0; 1776 d->write_status = WRITE_START; 1777 } 1778 1779 if (d->pending) { 1780 memset(d->data, 0, d->length); 1781 if (d->length != MTP_WRITE_BUF_SZ) { 1782 usb_mtp_realloc(d, MTP_WRITE_BUF_SZ - d->length); 1783 d->length += (MTP_WRITE_BUF_SZ - d->length); 1784 } 1785 d->pending = false; 1786 d->write_status = WRITE_CONTINUE; 1787 d->data_offset = 0; 1788 } 1789 1790 if (d->length - d->data_offset > data_len) { 1791 dlen = data_len; 1792 } else { 1793 dlen = d->length - d->data_offset; 1794 } 1795 1796 switch (d->code) { 1797 case CMD_SEND_OBJECT_INFO: 1798 usb_packet_copy(p, d->data + d->data_offset, dlen); 1799 d->offset += dlen; 1800 d->data_offset += dlen; 1801 if (d->data_offset == d->length) { 1802 /* The operation might have already failed */ 1803 if (!s->result) { 1804 usb_mtp_write_metadata(s, dlen); 1805 } 1806 usb_mtp_data_free(s->data_out); 1807 s->data_out = NULL; 1808 return; 1809 } 1810 break; 1811 case CMD_SEND_OBJECT: 1812 usb_packet_copy(p, d->data + d->data_offset, dlen); 1813 d->offset += dlen; 1814 d->data_offset += dlen; 1815 if ((p->iov.size % 64) || !p->iov.size) { 1816 assert((s->dataset.size == 0xFFFFFFFF) || 1817 (s->dataset.size == d->offset)); 1818 1819 if (d->length == MTP_WRITE_BUF_SZ) { 1820 d->write_status = WRITE_END; 1821 } else { 1822 d->write_status = WRITE_START; 1823 } 1824 usb_mtp_write_data(s, 0); 1825 usb_mtp_data_free(s->data_out); 1826 s->data_out = NULL; 1827 return; 1828 } 1829 if (d->data_offset == d->length) { 1830 d->pending = true; 1831 usb_mtp_write_data(s, 0); 1832 } 1833 break; 1834 default: 1835 p->status = USB_RET_STALL; 1836 return; 1837 } 1838 } 1839 1840 static void usb_mtp_handle_data(USBDevice *dev, USBPacket *p) 1841 { 1842 MTPState *s = USB_MTP(dev); 1843 MTPControl cmd; 1844 mtp_container container; 1845 uint32_t params[5]; 1846 uint16_t container_type; 1847 int i, rc; 1848 1849 switch (p->ep->nr) { 1850 case EP_DATA_IN: 1851 if (s->data_out != NULL) { 1852 /* guest bug */ 1853 trace_usb_mtp_stall(s->dev.addr, "awaiting data-out"); 1854 p->status = USB_RET_STALL; 1855 return; 1856 } 1857 if (p->iov.size < sizeof(container)) { 1858 trace_usb_mtp_stall(s->dev.addr, "packet too small"); 1859 p->status = USB_RET_STALL; 1860 return; 1861 } 1862 if (s->data_in != NULL) { 1863 MTPData *d = s->data_in; 1864 uint64_t dlen = d->length - d->offset; 1865 if (d->first) { 1866 trace_usb_mtp_data_in(s->dev.addr, d->trans, d->length); 1867 if (d->length + sizeof(container) > 0xFFFFFFFF) { 1868 container.length = cpu_to_le32(0xFFFFFFFF); 1869 } else { 1870 container.length = 1871 cpu_to_le32(d->length + sizeof(container)); 1872 } 1873 container.type = cpu_to_le16(TYPE_DATA); 1874 container.code = cpu_to_le16(d->code); 1875 container.trans = cpu_to_le32(d->trans); 1876 usb_packet_copy(p, &container, sizeof(container)); 1877 d->first = false; 1878 if (dlen > p->iov.size - sizeof(container)) { 1879 dlen = p->iov.size - sizeof(container); 1880 } 1881 } else { 1882 if (dlen > p->iov.size) { 1883 dlen = p->iov.size; 1884 } 1885 } 1886 if (d->fd == -1) { 1887 usb_packet_copy(p, d->data + d->offset, dlen); 1888 } else { 1889 if (d->alloc < p->iov.size) { 1890 d->alloc = p->iov.size; 1891 d->data = g_realloc(d->data, d->alloc); 1892 } 1893 rc = read(d->fd, d->data, dlen); 1894 if (rc != dlen) { 1895 memset(d->data, 0, dlen); 1896 s->result->code = RES_INCOMPLETE_TRANSFER; 1897 } 1898 usb_packet_copy(p, d->data, dlen); 1899 } 1900 d->offset += dlen; 1901 if (d->offset == d->length) { 1902 usb_mtp_data_free(s->data_in); 1903 s->data_in = NULL; 1904 } 1905 } else if (s->result != NULL) { 1906 MTPControl *r = s->result; 1907 int length = sizeof(container) + r->argc * sizeof(uint32_t); 1908 if (r->code == RES_OK) { 1909 trace_usb_mtp_success(s->dev.addr, r->trans, 1910 (r->argc > 0) ? r->argv[0] : 0, 1911 (r->argc > 1) ? r->argv[1] : 0); 1912 } else { 1913 trace_usb_mtp_error(s->dev.addr, r->code, r->trans, 1914 (r->argc > 0) ? r->argv[0] : 0, 1915 (r->argc > 1) ? r->argv[1] : 0); 1916 } 1917 container.length = cpu_to_le32(length); 1918 container.type = cpu_to_le16(TYPE_RESPONSE); 1919 container.code = cpu_to_le16(r->code); 1920 container.trans = cpu_to_le32(r->trans); 1921 for (i = 0; i < r->argc; i++) { 1922 params[i] = cpu_to_le32(r->argv[i]); 1923 } 1924 usb_packet_copy(p, &container, sizeof(container)); 1925 usb_packet_copy(p, ¶ms, length - sizeof(container)); 1926 g_free(s->result); 1927 s->result = NULL; 1928 } 1929 break; 1930 case EP_DATA_OUT: 1931 if (p->iov.size < sizeof(container)) { 1932 trace_usb_mtp_stall(s->dev.addr, "packet too small"); 1933 p->status = USB_RET_STALL; 1934 return; 1935 } 1936 if ((s->data_out != NULL) && !s->data_out->first) { 1937 container_type = TYPE_DATA; 1938 } else { 1939 usb_packet_copy(p, &container, sizeof(container)); 1940 container_type = le16_to_cpu(container.type); 1941 } 1942 switch (container_type) { 1943 case TYPE_COMMAND: 1944 if (s->data_in || s->data_out || s->result) { 1945 trace_usb_mtp_stall(s->dev.addr, "transaction inflight"); 1946 p->status = USB_RET_STALL; 1947 return; 1948 } 1949 cmd.code = le16_to_cpu(container.code); 1950 cmd.argc = (le32_to_cpu(container.length) - sizeof(container)) 1951 / sizeof(uint32_t); 1952 cmd.trans = le32_to_cpu(container.trans); 1953 if (cmd.argc > ARRAY_SIZE(cmd.argv)) { 1954 cmd.argc = ARRAY_SIZE(cmd.argv); 1955 } 1956 if (p->iov.size < sizeof(container) + cmd.argc * sizeof(uint32_t)) { 1957 trace_usb_mtp_stall(s->dev.addr, "packet too small"); 1958 p->status = USB_RET_STALL; 1959 return; 1960 } 1961 usb_packet_copy(p, ¶ms, cmd.argc * sizeof(uint32_t)); 1962 for (i = 0; i < cmd.argc; i++) { 1963 cmd.argv[i] = le32_to_cpu(params[i]); 1964 } 1965 trace_usb_mtp_command(s->dev.addr, cmd.code, cmd.trans, 1966 (cmd.argc > 0) ? cmd.argv[0] : 0, 1967 (cmd.argc > 1) ? cmd.argv[1] : 0, 1968 (cmd.argc > 2) ? cmd.argv[2] : 0, 1969 (cmd.argc > 3) ? cmd.argv[3] : 0, 1970 (cmd.argc > 4) ? cmd.argv[4] : 0); 1971 usb_mtp_command(s, &cmd); 1972 break; 1973 case TYPE_DATA: 1974 /* One of the previous transfers has already errored but the 1975 * responder is still sending data associated with it 1976 */ 1977 if (s->result != NULL) { 1978 return; 1979 } 1980 usb_mtp_get_data(s, &container, p); 1981 break; 1982 default: 1983 /* not needed as long as the mtp device is read-only */ 1984 p->status = USB_RET_STALL; 1985 return; 1986 } 1987 break; 1988 case EP_EVENT: 1989 if (!QTAILQ_EMPTY(&s->events)) { 1990 struct MTPMonEntry *e = QTAILQ_LAST(&s->events); 1991 uint32_t handle; 1992 int len = sizeof(container) + sizeof(uint32_t); 1993 1994 if (p->iov.size < len) { 1995 trace_usb_mtp_stall(s->dev.addr, 1996 "packet too small to send event"); 1997 p->status = USB_RET_STALL; 1998 return; 1999 } 2000 2001 QTAILQ_REMOVE(&s->events, e, next); 2002 container.length = cpu_to_le32(len); 2003 container.type = cpu_to_le32(TYPE_EVENT); 2004 container.code = cpu_to_le16(e->event); 2005 container.trans = 0; /* no trans specific events */ 2006 handle = cpu_to_le32(e->handle); 2007 usb_packet_copy(p, &container, sizeof(container)); 2008 usb_packet_copy(p, &handle, sizeof(uint32_t)); 2009 g_free(e); 2010 return; 2011 } 2012 p->status = USB_RET_NAK; 2013 return; 2014 default: 2015 trace_usb_mtp_stall(s->dev.addr, "invalid endpoint"); 2016 p->status = USB_RET_STALL; 2017 return; 2018 } 2019 2020 if (p->actual_length == 0) { 2021 trace_usb_mtp_nak(s->dev.addr, p->ep->nr); 2022 p->status = USB_RET_NAK; 2023 return; 2024 } else { 2025 trace_usb_mtp_xfer(s->dev.addr, p->ep->nr, p->actual_length, 2026 p->iov.size); 2027 return; 2028 } 2029 } 2030 2031 static void usb_mtp_realize(USBDevice *dev, Error **errp) 2032 { 2033 MTPState *s = USB_MTP(dev); 2034 2035 if ((s->root == NULL) || !g_path_is_absolute(s->root)) { 2036 error_setg(errp, "usb-mtp: rootdir must be configured and be an absolute path"); 2037 return; 2038 } 2039 2040 if (access(s->root, R_OK) != 0) { 2041 error_setg(errp, "usb-mtp: rootdir does not exist/not readable"); 2042 return; 2043 } else if (!s->readonly && access(s->root, W_OK) != 0) { 2044 error_setg(errp, "usb-mtp: rootdir does not have write permissions"); 2045 return; 2046 } 2047 2048 /* Mark store as RW */ 2049 if (!s->readonly) { 2050 s->flags |= (1 << MTP_FLAG_WRITABLE); 2051 } 2052 2053 if (s->desc == NULL) { 2054 /* 2055 * This does not check if path exists 2056 * but we have the checks above 2057 */ 2058 s->desc = g_path_get_basename(s->root); 2059 } 2060 2061 usb_desc_create_serial(dev); 2062 usb_desc_init(dev); 2063 QTAILQ_INIT(&s->objects); 2064 2065 } 2066 2067 static const VMStateDescription vmstate_usb_mtp = { 2068 .name = "usb-mtp", 2069 .unmigratable = 1, 2070 .version_id = 1, 2071 .minimum_version_id = 1, 2072 .fields = (const VMStateField[]) { 2073 VMSTATE_USB_DEVICE(dev, MTPState), 2074 VMSTATE_END_OF_LIST() 2075 } 2076 }; 2077 2078 static const Property mtp_properties[] = { 2079 DEFINE_PROP_STRING("rootdir", MTPState, root), 2080 DEFINE_PROP_STRING("desc", MTPState, desc), 2081 DEFINE_PROP_BOOL("readonly", MTPState, readonly, true), 2082 }; 2083 2084 static void usb_mtp_class_initfn(ObjectClass *klass, const void *data) 2085 { 2086 DeviceClass *dc = DEVICE_CLASS(klass); 2087 USBDeviceClass *uc = USB_DEVICE_CLASS(klass); 2088 2089 uc->realize = usb_mtp_realize; 2090 uc->product_desc = "QEMU USB MTP"; 2091 uc->usb_desc = &desc; 2092 uc->cancel_packet = usb_mtp_cancel_packet; 2093 uc->handle_attach = usb_desc_attach; 2094 uc->handle_reset = usb_mtp_handle_reset; 2095 uc->handle_control = usb_mtp_handle_control; 2096 uc->handle_data = usb_mtp_handle_data; 2097 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 2098 dc->desc = "USB Media Transfer Protocol device"; 2099 dc->fw_name = "mtp"; 2100 dc->vmsd = &vmstate_usb_mtp; 2101 device_class_set_props(dc, mtp_properties); 2102 } 2103 2104 static const TypeInfo mtp_info = { 2105 .name = TYPE_USB_MTP, 2106 .parent = TYPE_USB_DEVICE, 2107 .instance_size = sizeof(MTPState), 2108 .class_init = usb_mtp_class_initfn, 2109 }; 2110 2111 static void usb_mtp_register_types(void) 2112 { 2113 type_register_static(&mtp_info); 2114 } 2115 2116 type_init(usb_mtp_register_types) 2117