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[mirror_qemu.git] / hw / usb / dev-mtp.c
CommitLineData
840a178c
GH		 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
e532b2e0 12#include "qemu/osdep.h"
a8d25326 13#include "qemu-common.h"
da34e65c 14#include "qapi/error.h"
47287c27 15#include "qemu/error-report.h"
840a178c
GH		 16#include <wchar.h>
17#include <dirent.h>
840a178c 18
840a178c 19#include <sys/statvfs.h>
47287c27 20
840a178c 21
840a178c 22#include "qemu/iov.h"
0b8fa32f 23#include "qemu/module.h"
47287c27 24#include "qemu/filemonitor.h"
840a178c 25#include "trace.h"
a27bd6c7 26#include "hw/qdev-properties.h"
840a178c 27#include "hw/usb.h"
d6454270 28#include "migration/vmstate.h"
463581a8 29#include "desc.h"
179fcf8a 30#include "qemu/units.h"
db1015e9 31#include "qom/object.h"
840a178c
GH		 32
33/* ----------------------------------------------------------------------- */
34
35enum mtp_container_type {
36 TYPE_COMMAND = 1,
37 TYPE_DATA = 2,
38 TYPE_RESPONSE = 3,
39 TYPE_EVENT = 4,
40};
41
c1ef0f25
BD		 42/* MTP write stage, for internal use only */
43enum mtp_write_status {
44 WRITE_START = 1,
45 WRITE_CONTINUE = 2,
46 WRITE_END = 3,
47};
48
840a178c
GH		 49enum 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,
ec6206a6 60 CMD_DELETE_OBJECT = 0x100b,
53735bef 61 CMD_SEND_OBJECT_INFO = 0x100c,
88d5f381 62 CMD_SEND_OBJECT = 0x100d,
840a178c 63 CMD_GET_PARTIAL_OBJECT = 0x101b,
67f3ef0c
IL		 64 CMD_GET_OBJECT_PROPS_SUPPORTED = 0x9801,
65 CMD_GET_OBJECT_PROP_DESC = 0x9802,
66 CMD_GET_OBJECT_PROP_VALUE = 0x9803,
840a178c
GH		 67
68 /* response codes */
69 RES_OK = 0x2001,
22513a9b 70 RES_GENERAL_ERROR = 0x2002,
840a178c
GH		 71 RES_SESSION_NOT_OPEN = 0x2003,
72 RES_INVALID_TRANSACTION_ID = 0x2004,
73 RES_OPERATION_NOT_SUPPORTED = 0x2005,
74 RES_PARAMETER_NOT_SUPPORTED = 0x2006,
8ebb8763 75 RES_INCOMPLETE_TRANSFER = 0x2007,
840a178c
GH		 76 RES_INVALID_STORAGE_ID = 0x2008,
77 RES_INVALID_OBJECT_HANDLE = 0x2009,
67f3ef0c 78 RES_INVALID_OBJECT_FORMAT_CODE = 0x200b,
88d5f381 79 RES_STORE_FULL = 0x200c,
ec6206a6
BD		 80 RES_STORE_READ_ONLY = 0x200e,
81 RES_PARTIAL_DELETE = 0x2012,
53735bef 82 RES_STORE_NOT_AVAILABLE = 0x2013,
840a178c 83 RES_SPEC_BY_FORMAT_UNSUPPORTED = 0x2014,
88d5f381 84 RES_INVALID_OBJECTINFO = 0x2015,
53735bef 85 RES_DESTINATION_UNSUPPORTED = 0x2020,
840a178c
GH		 86 RES_INVALID_PARENT_OBJECT = 0x201a,
87 RES_INVALID_PARAMETER = 0x201d,
88 RES_SESSION_ALREADY_OPEN = 0x201e,
67f3ef0c 89 RES_INVALID_OBJECT_PROP_CODE = 0xA801,
840a178c
GH		 90
91 /* format codes */
92 FMT_UNDEFINED_OBJECT = 0x3000,
93 FMT_ASSOCIATION = 0x3001,
8e3e3897
BD		 94
95 /* event codes */
47bff13c 96 EVT_CANCEL_TRANSACTION = 0x4001,
8e3e3897
BD		 97 EVT_OBJ_ADDED = 0x4002,
98 EVT_OBJ_REMOVED = 0x4003,
99 EVT_OBJ_INFO_CHANGED = 0x4007,
67f3ef0c
IL		 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
110enum 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,
840a178c
GH		 116};
117
118typedef 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
127typedef struct MTPState MTPState;
128typedef struct MTPControl MTPControl;
129typedef struct MTPData MTPData;
130typedef struct MTPObject MTPObject;
131
132enum {
133 EP_DATA_IN = 1,
134 EP_DATA_OUT,
135 EP_EVENT,
136};
137
8e3e3897
BD		 138typedef struct MTPMonEntry MTPMonEntry;
139
140struct MTPMonEntry {
141 uint32_t event;
142 uint32_t handle;
143
144 QTAILQ_ENTRY(MTPMonEntry) next;
145};
8e3e3897 146
840a178c
GH		 147struct MTPControl {
148 uint16_t code;
149 uint32_t trans;
150 int argc;
151 uint32_t argv[5];
152};
153
154struct MTPData {
155 uint16_t code;
156 uint32_t trans;
8a5865f3
IL		 157 uint64_t offset;
158 uint64_t length;
3e096650 159 uint64_t alloc;
840a178c
GH		 160 uint8_t *data;
161 bool first;
3e096650
BD		 162 /* Used for >4G file sizes */
163 bool pending;
840a178c 164 int fd;
c1ef0f25
BD		 165 uint8_t write_status;
166 /* Internal pointer per every MTP_WRITE_BUF_SZ */
167 uint64_t data_offset;
840a178c
GH		 168};
169
170struct MTPObject {
171 uint32_t handle;
172 uint16_t format;
173 char *name;
174 char *path;
175 struct stat stat;
47287c27 176 /* file monitor watch id */
b4682a63 177 int64_t watchid;
840a178c 178 MTPObject *parent;
36084d7e 179 uint32_t nchildren;
4c7a67f5
BD		 180 QLIST_HEAD(, MTPObject) children;
181 QLIST_ENTRY(MTPObject) list;
36084d7e 182 bool have_children;
840a178c
GH		 183 QTAILQ_ENTRY(MTPObject) next;
184};
185
186struct 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;
ec6206a6 197 bool readonly;
840a178c
GH		 198
199 QTAILQ_HEAD(, MTPObject) objects;
47287c27 200 QFileMonitor *file_monitor;
eae3eb3e 201 QTAILQ_HEAD(, MTPMonEntry) events;
88d5f381
BD		 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;
840a178c
GH		 210};
211
53735bef
BD		 212/*
213 * ObjectInfo dataset received from initiator
214 * Fields we don't care about are ignored
215 */
216typedef 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*/
1259f27e 233 uint8_t filename[0]; /* UTF-16 encoded */
53735bef
BD		 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
7c03a899 240#define TYPE_USB_MTP "usb-mtp"
8110fa1d
EH		 241DECLARE_INSTANCE_CHECKER(MTPState, USB_MTP,
242 TYPE_USB_MTP)
7c03a899 243
840a178c
GH		 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"
179fcf8a 254#define MTP_WRITE_BUF_SZ (512 * KiB)
840a178c
GH		 255
256enum {
257 STR_MANUFACTURER = 1,
258 STR_PRODUCT,
259 STR_SERIALNUMBER,
13d54125 260 STR_MTP,
840a178c
GH		 261 STR_CONFIG_FULL,
262 STR_CONFIG_HIGH,
263 STR_CONFIG_SUPER,
264};
265
266static const USBDescStrings desc_strings = {
267 [STR_MANUFACTURER] = MTP_MANUFACTURER,
268 [STR_PRODUCT] = MTP_PRODUCT,
269 [STR_SERIALNUMBER] = "34617",
13d54125 270 [STR_MTP] = "MTP",
840a178c
GH		 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
276static const USBDescIface desc_iface_full = {
277 .bInterfaceNumber = 0,
278 .bNumEndpoints = 3,
279 .bInterfaceClass = USB_CLASS_STILL_IMAGE,
280 .bInterfaceSubClass = 0x01,
281 .bInterfaceProtocol = 0x01,
13d54125 282 .iInterface = STR_MTP,
840a178c
GH		 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,
93d592e3 295 .wMaxPacketSize = 64,
840a178c
GH		 296 .bInterval = 0x0a,
297 },
298 }
299};
300
301static 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
318static const USBDescIface desc_iface_high = {
319 .bInterfaceNumber = 0,
320 .bNumEndpoints = 3,
321 .bInterfaceClass = USB_CLASS_STILL_IMAGE,
322 .bInterfaceSubClass = 0x01,
323 .bInterfaceProtocol = 0x01,
13d54125 324 .iInterface = STR_MTP,
840a178c
GH		 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,
93d592e3 337 .wMaxPacketSize = 64,
840a178c
GH		 338 .bInterval = 0x0a,
339 },
340 }
341};
342
343static 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
360static const USBDescMSOS desc_msos = {
361 .CompatibleID = "MTP",
362 .SelectiveSuspendEnabled = true,
363};
364
365static 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
382static MTPObject *usb_mtp_object_alloc(MTPState *s, uint32_t handle,
888e0359 383 MTPObject *parent, const char *name)
840a178c
GH		 384{
385 MTPObject *o = g_new0(MTPObject, 1);
386
387 if (name[0] == '.') {
388 goto ignore;
389 }
390
47287c27 391 o->watchid = -1;
840a178c
GH		 392 o->handle = handle;
393 o->parent = parent;
394 o->name = g_strdup(name);
840a178c
GH		 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
1c76551f 416 trace_usb_mtp_object_alloc(s->dev.addr, o->handle, o->path);
840a178c
GH		 417
418 QTAILQ_INSERT_TAIL(&s->objects, o, next);
419 return o;
420
421ignore:
422 g_free(o->name);
423 g_free(o->path);
424 g_free(o);
425 return NULL;
426}
427
428static void usb_mtp_object_free(MTPState *s, MTPObject *o)
429{
4c7a67f5
BD		 430 MTPObject *iter;
431
432 if (!o) {
433 return;
434 }
840a178c 435
1c76551f 436 trace_usb_mtp_object_free(s->dev.addr, o->handle, o->path);
840a178c 437
47287c27
DB		 438 if (o->watchid != -1 && s->file_monitor) {
439 qemu_file_monitor_remove_watch(s->file_monitor, o->path, o->watchid);
440 }
441
840a178c 442 QTAILQ_REMOVE(&s->objects, o, next);
4c7a67f5
BD		 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);
840a178c 451 }
840a178c
GH		 452 g_free(o->name);
453 g_free(o->path);
454 g_free(o);
455}
456
457static 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
4c7a67f5 469static MTPObject *usb_mtp_add_child(MTPState *s, MTPObject *o,
888e0359 470 const char *name)
4c7a67f5
BD		 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
8e3e3897 488static MTPObject *usb_mtp_object_lookup_name(MTPObject *parent,
888e0359 489 const char *name, int len)
8e3e3897
BD		 490{
491 MTPObject *iter;
492
47287c27
DB		 493 if (len == -1) {
494 len = strlen(name);
495 }
496
8e3e3897
BD		 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
b4682a63 506static MTPObject *usb_mtp_object_lookup_id(MTPState *s, int64_t id)
8e3e3897
BD		 507{
508 MTPObject *iter;
509
510 QTAILQ_FOREACH(iter, &s->objects, next) {
47287c27 511 if (iter->watchid == id) {
8e3e3897
BD		 512 return iter;
513 }
514 }
515
516 return NULL;
517}
518
b4682a63 519static void file_monitor_event(int64_t id,
47287c27
DB		 520 QFileMonitorEvent ev,
521 const char *name,
522 void *opaque)
8e3e3897 523{
47287c27
DB		 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 */
8e3e3897
BD		 537 return;
538 }
47287c27
DB		 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;
8e3e3897 549
47287c27 550 case QFILE_MONITOR_EVENT_DELETED:
8e3e3897 551 /*
47287c27
DB		 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
8e3e3897 556 */
47287c27
DB		 557 o = usb_mtp_object_lookup_name(parent, name, -1);
558 if (!o) {
559 return;
8e3e3897 560 }
47287c27
DB		 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;
8e3e3897 567
47287c27
DB		 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;
8e3e3897 578
47287c27
DB		 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;
8e3e3897 583
47287c27
DB		 584 case QFILE_MONITOR_EVENT_ATTRIBUTES:
585 break;
8e3e3897 586
47287c27
DB		 587 default:
588 g_assert_not_reached();
589 }
8e3e3897 590
47287c27
DB		 591 if (entry) {
592 QTAILQ_INSERT_HEAD(&s->events, entry, next);
593 }
8e3e3897
BD		 594}
595
47287c27 596static void usb_mtp_file_monitor_cleanup(MTPState *s)
8e3e3897 597{
c22d5dcd 598 MTPMonEntry *e, *p;
8e3e3897 599
c22d5dcd 600 QTAILQ_FOREACH_SAFE(e, &s->events, next, p) {
8e3e3897
BD		 601 QTAILQ_REMOVE(&s->events, e, next);
602 g_free(e);
603 }
8e3e3897 604
47287c27
DB		 605 qemu_file_monitor_free(s->file_monitor);
606 s->file_monitor = NULL;
8e3e3897 607}
47287c27 608
8e3e3897 609
840a178c
GH		 610static void usb_mtp_object_readdir(MTPState *s, MTPObject *o)
611{
612 struct dirent *entry;
613 DIR *dir;
bab9df35 614 int fd;
47287c27 615 Error *err = NULL;
840a178c 616
36084d7e
GH		 617 if (o->have_children) {
618 return;
619 }
620 o->have_children = true;
621
bab9df35
GH		 622 fd = open(o->path, O_DIRECTORY | O_CLOEXEC | O_NOFOLLOW);
623 if (fd < 0) {
624 return;
625 }
626 dir = fdopendir(fd);
840a178c 627 if (!dir) {
6e3c1a68 628 close(fd);
840a178c
GH		 629 return;
630 }
47287c27
DB		 631
632 if (s->file_monitor) {
b4682a63
DB		 633 int64_t id = qemu_file_monitor_add_watch(s->file_monitor, o->path, NULL,
634 file_monitor_event, s, &err);
47287c27 635 if (id == -1) {
5217f188
MA		 636 error_reportf_err(err,
637 "usb-mtp: failed to add watch for %s: ",
638 o->path);
47287c27
DB		 639 } else {
640 trace_usb_mtp_file_monitor_event(s->dev.addr, o->path,
641 "Watch Added");
642 o->watchid = id;
643 }
8e3e3897 644 }
47287c27 645
840a178c 646 while ((entry = readdir(dir)) != NULL) {
4c7a67f5 647 usb_mtp_add_child(s, o, entry->d_name);
840a178c
GH		 648 }
649 closedir(dir);
650}
651
652/* ----------------------------------------------------------------------- */
653
654static 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
665static 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
677static 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
686static 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
692static 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
699static 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
708static void usb_mtp_add_u64(MTPData *data, uint64_t val)
709{
ada435f4 710 usb_mtp_realloc(data, 8);
840a178c
GH		 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;
ada435f4 718 data->data[data->length++] = (val >> 56) & 0xff;
840a178c
GH		 719}
720
721static 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
732static 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
743static 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
758static void usb_mtp_add_str(MTPData *data, const char *str)
759{
760 uint32_t len = strlen(str)+1;
e3d60bc7 761 wchar_t *wstr = g_new(wchar_t, len);
840a178c
GH		 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 }
e3d60bc7
PX		 770
771 g_free(wstr);
840a178c
GH		 772}
773
774static 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
786static void usb_mtp_queue_result(MTPState *s, uint16_t code, uint32_t trans,
9c727584
BD		 787 int argc, uint32_t arg0, uint32_t arg1,
788 uint32_t arg2)
840a178c
GH		 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 }
9c727584
BD		 801 if (argc > 2) {
802 c->argv[2] = arg2;
803 }
840a178c
GH		 804
805 assert(s->result == NULL);
806 s->result = c;
807}
808
809/* ----------------------------------------------------------------------- */
810
811static 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,
ec6206a6 822 CMD_DELETE_OBJECT,
53735bef 823 CMD_SEND_OBJECT_INFO,
88d5f381 824 CMD_SEND_OBJECT,
840a178c
GH		 825 CMD_GET_OBJECT,
826 CMD_GET_PARTIAL_OBJECT,
67f3ef0c
IL		 827 CMD_GET_OBJECT_PROPS_SUPPORTED,
828 CMD_GET_OBJECT_PROP_DESC,
829 CMD_GET_OBJECT_PROP_VALUE,
840a178c
GH		 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
f7eaed85 839 usb_mtp_add_u16(d, 100);
1f66fe57
IL		 840 usb_mtp_add_u32(d, 0x00000006);
841 usb_mtp_add_u16(d, 0x0064);
840a178c
GH		 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");
9e4eff5b 854 usb_mtp_add_wstr(d, L"0123456789abcdef0123456789abcdef");
840a178c
GH		 855
856 return d;
857}
858
859static 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
873static 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
907static MTPData *usb_mtp_get_object_handles(MTPState *s, MTPControl *c,
908 MTPObject *o)
909{
910 MTPData *d = usb_mtp_data_alloc(c);
4c7a67f5
BD		 911 uint32_t i = 0, handles[o->nchildren];
912 MTPObject *iter;
840a178c
GH		 913
914 trace_usb_mtp_op_get_object_handles(s->dev.addr, o->handle, o->path);
915
4c7a67f5
BD		 916 QLIST_FOREACH(iter, &o->children, list) {
917 handles[i++] = iter->handle;
840a178c 918 }
4c7a67f5 919 assert(i == o->nchildren);
840a178c
GH		 920 usb_mtp_add_u32_array(d, o->nchildren, handles);
921
922 return d;
923}
924
925static 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);
8a5865f3
IL		 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 }
840a178c
GH		 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
973static 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
bab9df35 980 d->fd = open(o->path, O_RDONLY | O_CLOEXEC | O_NOFOLLOW);
840a178c 981 if (d->fd == -1) {
2dc7fdf3 982 usb_mtp_data_free(d);
840a178c
GH		 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
991static MTPData *usb_mtp_get_partial_object(MTPState *s, MTPControl *c,
992 MTPObject *o)
993{
62713a2e 994 MTPData *d;
840a178c
GH		 995 off_t offset;
996
62713a2e
PMD		 997 if (c->argc <= 2) {
998 return NULL;
999 }
840a178c
GH		 1000 trace_usb_mtp_op_get_partial_object(s->dev.addr, o->handle, o->path,
1001 c->argv[1], c->argv[2]);
1002
62713a2e 1003 d = usb_mtp_data_alloc(c);
bab9df35 1004 d->fd = open(o->path, O_RDONLY | O_CLOEXEC | O_NOFOLLOW);
840a178c 1005 if (d->fd == -1) {
2dc7fdf3 1006 usb_mtp_data_free(d);
840a178c
GH		 1007 return NULL;
1008 }
1009
1010 offset = c->argv[1];
1011 if (offset > o->stat.st_size) {
1012 offset = o->stat.st_size;
1013 }
68206d73
GH		 1014 if (lseek(d->fd, offset, SEEK_SET) < 0) {
1015 usb_mtp_data_free(d);
1016 return NULL;
1017 }
840a178c
GH		 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
67f3ef0c
IL		 1027static 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
1043static 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
1104static 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:
b12227af 1126 /* Should be persistent between sessions,
67f3ef0c
IL		 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
4bc15916
BD		 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 */
ec6206a6 1152enum {
4bc15916
BD		 1153 DELETE_SUCCESS = (1 << 0),
1154 DELETE_FAILURE = (1 << 1),
1155 DELETE_PARTIAL = (DELETE_FAILURE | DELETE_SUCCESS),
ec6206a6
BD		 1156};
1157
ec6206a6
BD		 1158static int usb_mtp_deletefn(MTPState *s, MTPObject *o, uint32_t trans)
1159{
1160 MTPObject *iter, *iter2;
4bc15916 1161 int ret = 0;
ec6206a6
BD		 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) {
4bc15916 1170 ret |= usb_mtp_deletefn(s, iter2, trans);
ec6206a6
BD		 1171 }
1172 }
1173 }
1174
1175 if (o->format == FMT_UNDEFINED_OBJECT) {
1176 if (remove(o->path)) {
4bc15916 1177 ret |= DELETE_FAILURE;
ec6206a6 1178 } else {
b396733d 1179 usb_mtp_object_free(s, o);
4bc15916 1180 ret |= DELETE_SUCCESS;
ec6206a6 1181 }
7ddf8374 1182 } else if (o->format == FMT_ASSOCIATION) {
ec6206a6 1183 if (rmdir(o->path)) {
4bc15916 1184 ret |= DELETE_FAILURE;
ec6206a6 1185 } else {
b396733d 1186 usb_mtp_object_free(s, o);
4bc15916 1187 ret |= DELETE_SUCCESS;
ec6206a6
BD		 1188 }
1189 }
1190
4bc15916 1191 return ret;
ec6206a6
BD		 1192}
1193
1194static 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);
4bc15916
BD		 1225 switch (ret) {
1226 case DELETE_SUCCESS:
ec6206a6
BD		 1227 usb_mtp_queue_result(s, RES_OK, trans,
1228 0, 0, 0, 0);
4bc15916
BD		 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();
ec6206a6 1240 }
4bc15916
BD		 1241
1242 return;
ec6206a6
BD		 1243}
1244
840a178c
GH		 1245static void usb_mtp_command(MTPState *s, MTPControl *c)
1246{
1247 MTPData *data_in = NULL;
53735bef 1248 MTPObject *o = NULL;
840a178c 1249 uint32_t nres = 0, res0 = 0;
47287c27 1250 Error *err = NULL;
840a178c
GH		 1251
1252 /* sanity checks */
1253 if (c->code >= CMD_CLOSE_SESSION && s->session == 0) {
1254 usb_mtp_queue_result(s, RES_SESSION_NOT_OPEN,
9c727584 1255 c->trans, 0, 0, 0, 0);
840a178c
GH		 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,
9c727584 1267 c->trans, 1, s->session, 0, 0);
840a178c
GH		 1268 return;
1269 }
1270 if (c->argv[0] == 0) {
1271 usb_mtp_queue_result(s, RES_INVALID_PARAMETER,
9c727584 1272 c->trans, 0, 0, 0, 0);
840a178c
GH		 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);
47287c27
DB		 1278
1279 s->file_monitor = qemu_file_monitor_new(&err);
1280 if (err) {
5217f188
MA		 1281 error_reportf_err(err,
1282 "usb-mtp: file monitoring init failed: ");
47287c27
DB		 1283 } else {
1284 QTAILQ_INIT(&s->events);
8e3e3897 1285 }
840a178c
GH		 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;
47287c27 1291 usb_mtp_file_monitor_cleanup(s);
840a178c
GH		 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,
9c727584 1302 c->trans, 0, 0, 0, 0);
840a178c
GH		 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,
9c727584 1312 c->trans, 0, 0, 0, 0);
840a178c
GH		 1313 return;
1314 }
1315 if (c->argv[1] != 0x00000000) {
1316 usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED,
9c727584 1317 c->trans, 0, 0, 0, 0);
840a178c
GH		 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,
9c727584 1328 c->trans, 0, 0, 0, 0);
840a178c
GH		 1329 return;
1330 }
1331 if (o->format != FMT_ASSOCIATION) {
1332 usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT,
9c727584 1333 c->trans, 0, 0, 0, 0);
840a178c
GH		 1334 return;
1335 }
36084d7e 1336 usb_mtp_object_readdir(s, o);
840a178c
GH		 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,
9c727584 1349 c->trans, 0, 0, 0, 0);
840a178c
GH		 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,
9c727584 1358 c->trans, 0, 0, 0, 0);
840a178c
GH		 1359 return;
1360 }
1361 if (o->format == FMT_ASSOCIATION) {
1362 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
9c727584 1363 c->trans, 0, 0, 0, 0);
840a178c
GH		 1364 return;
1365 }
1366 data_in = usb_mtp_get_object(s, c, o);
d0657b2a 1367 if (data_in == NULL) {
22513a9b 1368 usb_mtp_queue_result(s, RES_GENERAL_ERROR,
9c727584 1369 c->trans, 0, 0, 0, 0);
22513a9b 1370 return;
840a178c
GH		 1371 }
1372 break;
ec6206a6
BD		 1373 case CMD_DELETE_OBJECT:
1374 usb_mtp_object_delete(s, c->argv[0], c->argv[1], c->trans);
1375 return;
840a178c
GH		 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,
9c727584 1380 c->trans, 0, 0, 0, 0);
840a178c
GH		 1381 return;
1382 }
1383 if (o->format == FMT_ASSOCIATION) {
1384 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
9c727584 1385 c->trans, 0, 0, 0, 0);
840a178c
GH		 1386 return;
1387 }
1388 data_in = usb_mtp_get_partial_object(s, c, o);
d0657b2a 1389 if (data_in == NULL) {
22513a9b 1390 usb_mtp_queue_result(s, RES_GENERAL_ERROR,
9c727584 1391 c->trans, 0, 0, 0, 0);
22513a9b 1392 return;
840a178c
GH		 1393 }
1394 nres = 1;
1395 res0 = data_in->length;
1396 break;
53735bef
BD		 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);
24e8d1fa 1421 } else if (o->format != FMT_ASSOCIATION) {
53735bef
BD		 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;
88d5f381
BD		 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;
67f3ef0c
IL		 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,
9c727584 1448 c->trans, 0, 0, 0, 0);
67f3ef0c
IL		 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,
9c727584 1457 c->trans, 0, 0, 0, 0);
67f3ef0c
IL		 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,
9c727584 1463 c->trans, 0, 0, 0, 0);
67f3ef0c
IL		 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,
9c727584 1471 c->trans, 0, 0, 0, 0);
67f3ef0c
IL		 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,
9c727584 1477 c->trans, 0, 0, 0, 0);
67f3ef0c
IL		 1478 return;
1479 }
1480 break;
840a178c 1481 default:
1c76551f 1482 trace_usb_mtp_op_unknown(s->dev.addr, c->code);
840a178c 1483 usb_mtp_queue_result(s, RES_OPERATION_NOT_SUPPORTED,
9c727584 1484 c->trans, 0, 0, 0, 0);
840a178c
GH		 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 }
9c727584 1493 usb_mtp_queue_result(s, RES_OK, c->trans, nres, res0, 0, 0);
840a178c
GH		 1494}
1495
1496/* ----------------------------------------------------------------------- */
1497
1498static void usb_mtp_handle_reset(USBDevice *dev)
1499{
7c03a899 1500 MTPState *s = USB_MTP(dev);
840a178c
GH		 1501
1502 trace_usb_mtp_reset(s->dev.addr);
1503
47287c27 1504 usb_mtp_file_monitor_cleanup(s);
b3c4d425 1505 usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects));
840a178c
GH		 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
1515static 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;
47bff13c
BD		 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;
f7c36a75 1533 s->dataset.size = 0;
47bff13c
BD		 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 }
840a178c
GH		 1547 }
1548
1549 trace_usb_mtp_stall(dev->addr, "unknown control request");
840a178c
GH		 1550}
1551
1552static void usb_mtp_cancel_packet(USBDevice *dev, USBPacket *p)
1553{
1c76551f 1554 /* we don't use async packets, so this should never be called */
840a178c
GH		 1555 fprintf(stderr, "%s\n", __func__);
1556}
1557
1259f27e 1558static char *utf16_to_str(uint8_t len, uint8_t *str16)
53735bef 1559{
6de02a13
GH		 1560 wchar_t *wstr = g_new0(wchar_t, len + 1);
1561 int count, dlen;
1562 char *dest;
53735bef
BD		 1563
1564 for (count = 0; count < len; count++) {
6de02a13 1565 /* FIXME: not working for surrogate pairs */
1259f27e 1566 wstr[count] = lduw_le_p(str16 + (count * 2));
53735bef 1567 }
6de02a13 1568 wstr[count] = 0;
53735bef 1569
6de02a13
GH		 1570 dlen = wcstombs(NULL, wstr, 0) + 1;
1571 dest = g_malloc(dlen);
1572 wcstombs(dest, wstr, dlen);
53735bef 1573 g_free(wstr);
6de02a13 1574 return dest;
53735bef
BD		 1575}
1576
d33e3e4b 1577/* Wrapper around write, returns 0 on failure */
c1ef0f25 1578static uint64_t write_retry(int fd, void *buf, uint64_t size, off_t offset)
d33e3e4b 1579{
49f9e8d6 1580 uint64_t ret = 0;
d33e3e4b 1581
c1ef0f25
BD		 1582 if (lseek(fd, offset, SEEK_SET) < 0) {
1583 goto done;
1584 }
1585
49f9e8d6 1586 ret = qemu_write_full(fd, buf, size);
d33e3e4b 1587
c1ef0f25 1588done:
49f9e8d6 1589 return ret;
d33e3e4b
BD		 1590}
1591
c5ead51f 1592static int usb_mtp_update_object(MTPObject *parent, char *name)
c1ef0f25 1593{
83c44b44 1594 int ret = 0;
c5ead51f 1595
c1ef0f25
BD		 1596 MTPObject *o =
1597 usb_mtp_object_lookup_name(parent, name, strlen(name));
1598
1599 if (o) {
c5ead51f 1600 ret = lstat(o->path, &o->stat);
c1ef0f25 1601 }
c5ead51f
BD		 1602
1603 return ret;
c1ef0f25
BD		 1604}
1605
e39b8a66 1606static void usb_mtp_write_data(MTPState *s, uint32_t handle)
88d5f381
BD		 1607{
1608 MTPData *d = s->data_out;
1609 MTPObject *parent =
1610 usb_mtp_object_lookup(s, s->dataset.parent_handle);
1611 char *path = NULL;
3e096650 1612 uint64_t rc;
88d5f381 1613 mode_t mask = 0644;
298ac63c 1614 int ret = 0;
88d5f381
BD		 1615
1616 assert(d != NULL);
1617
c1ef0f25
BD		 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);
e39b8a66 1623 return;
88d5f381
BD		 1624 }
1625
c1ef0f25
BD		 1626 if (s->dataset.filename) {
1627 path = g_strdup_printf("%s/%s", parent->path, s->dataset.filename);
1628 if (s->dataset.format == FMT_ASSOCIATION) {
298ac63c 1629 ret = mkdir(path, mask);
e39b8a66
BD		 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;
c1ef0f25 1638 }
e39b8a66 1639
c1ef0f25
BD		 1640 d->fd = open(path, O_CREAT | O_WRONLY |
1641 O_CLOEXEC | O_NOFOLLOW, mask);
1642 if (d->fd == -1) {
e39b8a66 1643 ret = 1;
c1ef0f25
BD		 1644 goto done;
1645 }
88d5f381 1646
c1ef0f25
BD		 1647 /* Return success if initiator sent 0 sized data */
1648 if (!s->dataset.size) {
e39b8a66 1649 goto done;
c1ef0f25
BD		 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) {
e39b8a66 1661 ret = 1;
88d5f381 1662 goto done;
c1ef0f25
BD		 1663 }
1664 if (d->write_status != WRITE_END) {
298ac63c 1665 g_free(path);
e39b8a66 1666 return;
c1ef0f25 1667 } else {
c5ead51f
BD		 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)) {
c1ef0f25
BD		 1676 usb_mtp_queue_result(s, RES_INCOMPLETE_TRANSFER, d->trans,
1677 0, 0, 0, 0);
e39b8a66 1678 goto close;
88d5f381 1679 }
88d5f381
BD		 1680 }
1681 }
1682
88d5f381 1683done:
e39b8a66
BD		 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 }
1691close:
88d5f381
BD		 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);
298ac63c 1698 d->fd = -1;
88d5f381 1699 }
88d5f381 1700 g_free(s->dataset.filename);
f7c36a75 1701 s->dataset.size = 0;
88d5f381
BD		 1702 g_free(path);
1703 s->write_pending = false;
1704}
1705
90c1a742 1706static void usb_mtp_write_metadata(MTPState *s, uint64_t dlen)
53735bef
BD		 1707{
1708 MTPData *d = s->data_out;
1709 ObjectInfo *dataset = (ObjectInfo *)d->data;
6de02a13 1710 char *filename;
53735bef
BD		 1711 MTPObject *o;
1712 MTPObject *p = usb_mtp_object_lookup(s, s->dataset.parent_handle);
1713 uint32_t next_handle = s->next_handle;
375cb86d
DB		 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;
53735bef
BD		 1722
1723 assert(!s->write_pending);
24e8d1fa 1724 assert(p != NULL);
53735bef 1725
375cb86d 1726 filename = utf16_to_str(MIN(dataset->length, filename_chars),
90c1a742 1727 dataset->filename);
53735bef 1728
c52d46e0
GH		 1729 if (strchr(filename, '/')) {
1730 usb_mtp_queue_result(s, RES_PARAMETER_NOT_SUPPORTED, d->trans,
1731 0, 0, 0, 0);
8e3759ef 1732 g_free(filename);
c52d46e0
GH		 1733 return;
1734 }
1735
3541cd48 1736 o = usb_mtp_object_lookup_name(p, filename, -1);
53735bef
BD		 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;
53735bef
BD		 1744 s->write_pending = true;
1745
1746 if (s->dataset.format == FMT_ASSOCIATION) {
e39b8a66
BD		 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);
53735bef 1751 }
53735bef
BD		 1752}
1753
88d5f381
BD		 1754static 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;
406f35d7 1760 uint64_t total_len;
88d5f381 1761
3c969a60
BD		 1762 if (!d) {
1763 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, 0,
1764 0, 0, 0, 0);
1765 return;
1766 }
88d5f381
BD		 1767 if (d->first) {
1768 /* Total length of incoming data */
406f35d7 1769 total_len = cpu_to_le32(container->length) - sizeof(mtp_container);
88d5f381
BD		 1770 /* Length of data in this packet */
1771 data_len -= sizeof(mtp_container);
179fcf8a
BD		 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 }
88d5f381
BD		 1779 d->offset = 0;
1780 d->first = false;
3e096650 1781 d->pending = false;
c1ef0f25
BD		 1782 d->data_offset = 0;
1783 d->write_status = WRITE_START;
3e096650
BD		 1784 }
1785
1786 if (d->pending) {
c1ef0f25
BD		 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 }
3e096650 1792 d->pending = false;
c1ef0f25
BD		 1793 d->write_status = WRITE_CONTINUE;
1794 d->data_offset = 0;
88d5f381
BD		 1795 }
1796
c1ef0f25 1797 if (d->length - d->data_offset > data_len) {
88d5f381
BD		 1798 dlen = data_len;
1799 } else {
c1ef0f25 1800 dlen = d->length - d->data_offset;
88d5f381
BD		 1801 }
1802
1803 switch (d->code) {
53735bef 1804 case CMD_SEND_OBJECT_INFO:
c1ef0f25 1805 usb_packet_copy(p, d->data + d->data_offset, dlen);
53735bef 1806 d->offset += dlen;
c1ef0f25
BD		 1807 d->data_offset += dlen;
1808 if (d->data_offset == d->length) {
53735bef
BD		 1809 /* The operation might have already failed */
1810 if (!s->result) {
90c1a742 1811 usb_mtp_write_metadata(s, dlen);
53735bef
BD		 1812 }
1813 usb_mtp_data_free(s->data_out);
1814 s->data_out = NULL;
1815 return;
1816 }
1817 break;
88d5f381 1818 case CMD_SEND_OBJECT:
c1ef0f25 1819 usb_packet_copy(p, d->data + d->data_offset, dlen);
88d5f381 1820 d->offset += dlen;
c1ef0f25 1821 d->data_offset += dlen;
3e096650
BD		 1822 if ((p->iov.size % 64) || !p->iov.size) {
1823 assert((s->dataset.size == 0xFFFFFFFF) ||
179fcf8a 1824 (s->dataset.size == d->offset));
3e096650 1825
c1ef0f25
BD		 1826 if (d->length == MTP_WRITE_BUF_SZ) {
1827 d->write_status = WRITE_END;
1828 } else {
1829 d->write_status = WRITE_START;
1830 }
e39b8a66 1831 usb_mtp_write_data(s, 0);
88d5f381
BD		 1832 usb_mtp_data_free(s->data_out);
1833 s->data_out = NULL;
1834 return;
1835 }
c1ef0f25 1836 if (d->data_offset == d->length) {
3e096650 1837 d->pending = true;
e39b8a66 1838 usb_mtp_write_data(s, 0);
3e096650 1839 }
88d5f381
BD		 1840 break;
1841 default:
1842 p->status = USB_RET_STALL;
1843 return;
1844 }
1845}
1846
840a178c
GH		 1847static void usb_mtp_handle_data(USBDevice *dev, USBPacket *p)
1848{
7c03a899 1849 MTPState *s = USB_MTP(dev);
840a178c
GH		 1850 MTPControl cmd;
1851 mtp_container container;
1852 uint32_t params[5];
88d5f381 1853 uint16_t container_type;
840a178c
GH		 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;
8a5865f3 1871 uint64_t dlen = d->length - d->offset;
840a178c
GH		 1872 if (d->first) {
1873 trace_usb_mtp_data_in(s->dev.addr, d->trans, d->length);
8a5865f3
IL		 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 }
840a178c
GH		 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) {
8ebb8763
GH		 1902 memset(d->data, 0, dlen);
1903 s->result->code = RES_INCOMPLETE_TRANSFER;
840a178c
GH		 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, &params, 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 }
24e8d1fa 1943 if ((s->data_out != NULL) && !s->data_out->first) {
88d5f381
BD		 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) {
840a178c
GH		 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);
afa82daf
GH		 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 }
840a178c
GH		 1968 usb_packet_copy(p, &params, 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;
88d5f381
BD		 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;
840a178c 1989 default:
9cd04ccf 1990 /* not needed as long as the mtp device is read-only */
840a178c
GH		 1991 p->status = USB_RET_STALL;
1992 return;
1993 }
1994 break;
1995 case EP_EVENT:
93d592e3 1996 if (!QTAILQ_EMPTY(&s->events)) {
eae3eb3e 1997 struct MTPMonEntry *e = QTAILQ_LAST(&s->events);
93d592e3
BD		 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 }
840a178c
GH		 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
df9bb666 2038static void usb_mtp_realize(USBDevice *dev, Error **errp)
840a178c 2039{
7c03a899 2040 MTPState *s = USB_MTP(dev);
840a178c 2041
e4c1c641
BD		 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;
840a178c 2045 }
e4c1c641
BD		 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
2392ae6b
BD		 2055 /* Mark store as RW */
2056 if (!s->readonly) {
2057 s->flags |= (1 << MTP_FLAG_WRITABLE);
2058 }
2059
e4c1c641
BD		 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
840a178c
GH		 2072}
2073
2074static 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
2085static Property mtp_properties[] = {
15aa757d 2086 DEFINE_PROP_STRING("rootdir", MTPState, root),
840a178c 2087 DEFINE_PROP_STRING("desc", MTPState, desc),
ec6206a6 2088 DEFINE_PROP_BOOL("readonly", MTPState, readonly, true),
840a178c
GH		 2089 DEFINE_PROP_END_OF_LIST(),
2090};
2091
2092static void usb_mtp_class_initfn(ObjectClass *klass, void *data)
2093{
2094 DeviceClass *dc = DEVICE_CLASS(klass);
2095 USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
2096
df9bb666 2097 uc->realize = usb_mtp_realize;
840a178c
GH		 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;
cdab4dc0
TH		 2105 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
2106 dc->desc = "USB Media Transfer Protocol device";
840a178c
GH		 2107 dc->fw_name = "mtp";
2108 dc->vmsd = &vmstate_usb_mtp;
4f67d30b 2109 device_class_set_props(dc, mtp_properties);
840a178c
GH		 2110}
2111
2112static TypeInfo mtp_info = {
7c03a899 2113 .name = TYPE_USB_MTP,
840a178c
GH		 2114 .parent = TYPE_USB_DEVICE,
2115 .instance_size = sizeof(MTPState),
2116 .class_init = usb_mtp_class_initfn,
2117};
2118
2119static void usb_mtp_register_types(void)
2120{
2121 type_register_static(&mtp_info);
2122}
2123
2124type_init(usb_mtp_register_types)
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