]> Git Repo - qemu.git/blame - hw/usb/dev-mtp.c
projects / qemu.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
usb-mtp: prevent null dereference while deleting objects
[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 <[email protected]>
8 *
9 * This code is licensed under the GPL v2 or later.
10 */
11
e532b2e0 12#include "qemu/osdep.h"
da34e65c 13#include "qapi/error.h"
47287c27 14#include "qemu/error-report.h"
840a178c
GH		 15#include <wchar.h>
16#include <dirent.h>
840a178c 17
840a178c 18#include <sys/statvfs.h>
47287c27 19
840a178c
GH		 20
21#include "qemu-common.h"
22#include "qemu/iov.h"
47287c27 23#include "qemu/filemonitor.h"
840a178c
GH		 24#include "trace.h"
25#include "hw/usb.h"
463581a8 26#include "desc.h"
179fcf8a 27#include "qemu/units.h"
840a178c
GH		 28
29/* ----------------------------------------------------------------------- */
30
31enum mtp_container_type {
32 TYPE_COMMAND = 1,
33 TYPE_DATA = 2,
34 TYPE_RESPONSE = 3,
35 TYPE_EVENT = 4,
36};
37
c1ef0f25
BD		 38/* MTP write stage, for internal use only */
39enum mtp_write_status {
40 WRITE_START = 1,
41 WRITE_CONTINUE = 2,
42 WRITE_END = 3,
43};
44
840a178c
GH		 45enum mtp_code {
46 /* command codes */
47 CMD_GET_DEVICE_INFO = 0x1001,
48 CMD_OPEN_SESSION = 0x1002,
49 CMD_CLOSE_SESSION = 0x1003,
50 CMD_GET_STORAGE_IDS = 0x1004,
51 CMD_GET_STORAGE_INFO = 0x1005,
52 CMD_GET_NUM_OBJECTS = 0x1006,
53 CMD_GET_OBJECT_HANDLES = 0x1007,
54 CMD_GET_OBJECT_INFO = 0x1008,
55 CMD_GET_OBJECT = 0x1009,
ec6206a6 56 CMD_DELETE_OBJECT = 0x100b,
53735bef 57 CMD_SEND_OBJECT_INFO = 0x100c,
88d5f381 58 CMD_SEND_OBJECT = 0x100d,
840a178c 59 CMD_GET_PARTIAL_OBJECT = 0x101b,
67f3ef0c
IL		 60 CMD_GET_OBJECT_PROPS_SUPPORTED = 0x9801,
61 CMD_GET_OBJECT_PROP_DESC = 0x9802,
62 CMD_GET_OBJECT_PROP_VALUE = 0x9803,
840a178c
GH		 63
64 /* response codes */
65 RES_OK = 0x2001,
22513a9b 66 RES_GENERAL_ERROR = 0x2002,
840a178c
GH		 67 RES_SESSION_NOT_OPEN = 0x2003,
68 RES_INVALID_TRANSACTION_ID = 0x2004,
69 RES_OPERATION_NOT_SUPPORTED = 0x2005,
70 RES_PARAMETER_NOT_SUPPORTED = 0x2006,
8ebb8763 71 RES_INCOMPLETE_TRANSFER = 0x2007,
840a178c
GH		 72 RES_INVALID_STORAGE_ID = 0x2008,
73 RES_INVALID_OBJECT_HANDLE = 0x2009,
67f3ef0c 74 RES_INVALID_OBJECT_FORMAT_CODE = 0x200b,
88d5f381 75 RES_STORE_FULL = 0x200c,
ec6206a6
BD		 76 RES_STORE_READ_ONLY = 0x200e,
77 RES_PARTIAL_DELETE = 0x2012,
53735bef 78 RES_STORE_NOT_AVAILABLE = 0x2013,
840a178c 79 RES_SPEC_BY_FORMAT_UNSUPPORTED = 0x2014,
88d5f381 80 RES_INVALID_OBJECTINFO = 0x2015,
53735bef 81 RES_DESTINATION_UNSUPPORTED = 0x2020,
840a178c
GH		 82 RES_INVALID_PARENT_OBJECT = 0x201a,
83 RES_INVALID_PARAMETER = 0x201d,
84 RES_SESSION_ALREADY_OPEN = 0x201e,
67f3ef0c 85 RES_INVALID_OBJECT_PROP_CODE = 0xA801,
840a178c
GH		 86
87 /* format codes */
88 FMT_UNDEFINED_OBJECT = 0x3000,
89 FMT_ASSOCIATION = 0x3001,
8e3e3897
BD		 90
91 /* event codes */
47bff13c 92 EVT_CANCEL_TRANSACTION = 0x4001,
8e3e3897
BD		 93 EVT_OBJ_ADDED = 0x4002,
94 EVT_OBJ_REMOVED = 0x4003,
95 EVT_OBJ_INFO_CHANGED = 0x4007,
67f3ef0c
IL		 96
97 /* object properties */
98 PROP_STORAGE_ID = 0xDC01,
99 PROP_OBJECT_FORMAT = 0xDC02,
100 PROP_OBJECT_COMPRESSED_SIZE = 0xDC04,
101 PROP_PARENT_OBJECT = 0xDC0B,
102 PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER = 0xDC41,
103 PROP_NAME = 0xDC44,
104};
105
106enum mtp_data_type {
107 DATA_TYPE_UINT16 = 0x0004,
108 DATA_TYPE_UINT32 = 0x0006,
109 DATA_TYPE_UINT64 = 0x0008,
110 DATA_TYPE_UINT128 = 0x000a,
111 DATA_TYPE_STRING = 0xffff,
840a178c
GH		 112};
113
114typedef struct {
115 uint32_t length;
116 uint16_t type;
117 uint16_t code;
118 uint32_t trans;
119} QEMU_PACKED mtp_container;
120
121/* ----------------------------------------------------------------------- */
122
123typedef struct MTPState MTPState;
124typedef struct MTPControl MTPControl;
125typedef struct MTPData MTPData;
126typedef struct MTPObject MTPObject;
127
128enum {
129 EP_DATA_IN = 1,
130 EP_DATA_OUT,
131 EP_EVENT,
132};
133
8e3e3897
BD		 134typedef struct MTPMonEntry MTPMonEntry;
135
136struct MTPMonEntry {
137 uint32_t event;
138 uint32_t handle;
139
140 QTAILQ_ENTRY(MTPMonEntry) next;
141};
8e3e3897 142
840a178c
GH		 143struct MTPControl {
144 uint16_t code;
145 uint32_t trans;
146 int argc;
147 uint32_t argv[5];
148};
149
150struct MTPData {
151 uint16_t code;
152 uint32_t trans;
8a5865f3
IL		 153 uint64_t offset;
154 uint64_t length;
3e096650 155 uint64_t alloc;
840a178c
GH		 156 uint8_t *data;
157 bool first;
3e096650
BD		 158 /* Used for >4G file sizes */
159 bool pending;
840a178c 160 int fd;
c1ef0f25
BD		 161 uint8_t write_status;
162 /* Internal pointer per every MTP_WRITE_BUF_SZ */
163 uint64_t data_offset;
840a178c
GH		 164};
165
166struct MTPObject {
167 uint32_t handle;
168 uint16_t format;
169 char *name;
170 char *path;
171 struct stat stat;
47287c27
DB		 172 /* file monitor watch id */
173 int watchid;
840a178c 174 MTPObject *parent;
36084d7e 175 uint32_t nchildren;
4c7a67f5
BD		 176 QLIST_HEAD(, MTPObject) children;
177 QLIST_ENTRY(MTPObject) list;
36084d7e 178 bool have_children;
840a178c
GH		 179 QTAILQ_ENTRY(MTPObject) next;
180};
181
182struct MTPState {
183 USBDevice dev;
184 char *root;
185 char *desc;
186 uint32_t flags;
187
188 MTPData *data_in;
189 MTPData *data_out;
190 MTPControl *result;
191 uint32_t session;
192 uint32_t next_handle;
ec6206a6 193 bool readonly;
840a178c
GH		 194
195 QTAILQ_HEAD(, MTPObject) objects;
47287c27 196 QFileMonitor *file_monitor;
eae3eb3e 197 QTAILQ_HEAD(, MTPMonEntry) events;
88d5f381
BD		 198 /* Responder is expecting a write operation */
199 bool write_pending;
200 struct {
201 uint32_t parent_handle;
202 uint16_t format;
203 uint32_t size;
204 char *filename;
205 } dataset;
840a178c
GH		 206};
207
53735bef
BD		 208/*
209 * ObjectInfo dataset received from initiator
210 * Fields we don't care about are ignored
211 */
212typedef struct {
213 uint32_t storage_id; /*unused*/
214 uint16_t format;
215 uint16_t protection_status; /*unused*/
216 uint32_t size;
217 uint16_t thumb_format; /*unused*/
218 uint32_t thumb_comp_sz; /*unused*/
219 uint32_t thumb_pix_width; /*unused*/
220 uint32_t thumb_pix_height; /*unused*/
221 uint32_t image_pix_width; /*unused*/
222 uint32_t image_pix_height; /*unused*/
223 uint32_t image_bit_depth; /*unused*/
224 uint32_t parent; /*unused*/
225 uint16_t assoc_type;
226 uint32_t assoc_desc;
227 uint32_t seq_no; /*unused*/
228 uint8_t length; /*part of filename field*/
229 uint16_t filename[0];
230 char date_created[0]; /*unused*/
231 char date_modified[0]; /*unused*/
232 char keywords[0]; /*unused*/
233 /* string and other data follows */
234} QEMU_PACKED ObjectInfo;
235
7c03a899
GA		 236#define TYPE_USB_MTP "usb-mtp"
237#define USB_MTP(obj) OBJECT_CHECK(MTPState, (obj), TYPE_USB_MTP)
238
840a178c
GH		 239#define QEMU_STORAGE_ID 0x00010001
240
241#define MTP_FLAG_WRITABLE 0
242
243#define FLAG_SET(_mtp, _flag) ((_mtp)->flags & (1 << (_flag)))
244
245/* ----------------------------------------------------------------------- */
246
247#define MTP_MANUFACTURER "QEMU"
248#define MTP_PRODUCT "QEMU filesharing"
179fcf8a 249#define MTP_WRITE_BUF_SZ (512 * KiB)
840a178c
GH		 250
251enum {
252 STR_MANUFACTURER = 1,
253 STR_PRODUCT,
254 STR_SERIALNUMBER,
13d54125 255 STR_MTP,
840a178c
GH		 256 STR_CONFIG_FULL,
257 STR_CONFIG_HIGH,
258 STR_CONFIG_SUPER,
259};
260
261static const USBDescStrings desc_strings = {
262 [STR_MANUFACTURER] = MTP_MANUFACTURER,
263 [STR_PRODUCT] = MTP_PRODUCT,
264 [STR_SERIALNUMBER] = "34617",
13d54125 265 [STR_MTP] = "MTP",
840a178c
GH		 266 [STR_CONFIG_FULL] = "Full speed config (usb 1.1)",
267 [STR_CONFIG_HIGH] = "High speed config (usb 2.0)",
268 [STR_CONFIG_SUPER] = "Super speed config (usb 3.0)",
269};
270
271static const USBDescIface desc_iface_full = {
272 .bInterfaceNumber = 0,
273 .bNumEndpoints = 3,
274 .bInterfaceClass = USB_CLASS_STILL_IMAGE,
275 .bInterfaceSubClass = 0x01,
276 .bInterfaceProtocol = 0x01,
13d54125 277 .iInterface = STR_MTP,
840a178c
GH		 278 .eps = (USBDescEndpoint[]) {
279 {
280 .bEndpointAddress = USB_DIR_IN | EP_DATA_IN,
281 .bmAttributes = USB_ENDPOINT_XFER_BULK,
282 .wMaxPacketSize = 64,
283 },{
284 .bEndpointAddress = USB_DIR_OUT | EP_DATA_OUT,
285 .bmAttributes = USB_ENDPOINT_XFER_BULK,
286 .wMaxPacketSize = 64,
287 },{
288 .bEndpointAddress = USB_DIR_IN | EP_EVENT,
289 .bmAttributes = USB_ENDPOINT_XFER_INT,
93d592e3 290 .wMaxPacketSize = 64,
840a178c
GH		 291 .bInterval = 0x0a,
292 },
293 }
294};
295
296static const USBDescDevice desc_device_full = {
297 .bcdUSB = 0x0200,
298 .bMaxPacketSize0 = 8,
299 .bNumConfigurations = 1,
300 .confs = (USBDescConfig[]) {
301 {
302 .bNumInterfaces = 1,
303 .bConfigurationValue = 1,
304 .iConfiguration = STR_CONFIG_FULL,
305 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP,
306 .bMaxPower = 2,
307 .nif = 1,
308 .ifs = &desc_iface_full,
309 },
310 },
311};
312
313static const USBDescIface desc_iface_high = {
314 .bInterfaceNumber = 0,
315 .bNumEndpoints = 3,
316 .bInterfaceClass = USB_CLASS_STILL_IMAGE,
317 .bInterfaceSubClass = 0x01,
318 .bInterfaceProtocol = 0x01,
13d54125 319 .iInterface = STR_MTP,
840a178c
GH		 320 .eps = (USBDescEndpoint[]) {
321 {
322 .bEndpointAddress = USB_DIR_IN | EP_DATA_IN,
323 .bmAttributes = USB_ENDPOINT_XFER_BULK,
324 .wMaxPacketSize = 512,
325 },{
326 .bEndpointAddress = USB_DIR_OUT | EP_DATA_OUT,
327 .bmAttributes = USB_ENDPOINT_XFER_BULK,
328 .wMaxPacketSize = 512,
329 },{
330 .bEndpointAddress = USB_DIR_IN | EP_EVENT,
331 .bmAttributes = USB_ENDPOINT_XFER_INT,
93d592e3 332 .wMaxPacketSize = 64,
840a178c
GH		 333 .bInterval = 0x0a,
334 },
335 }
336};
337
338static const USBDescDevice desc_device_high = {
339 .bcdUSB = 0x0200,
340 .bMaxPacketSize0 = 64,
341 .bNumConfigurations = 1,
342 .confs = (USBDescConfig[]) {
343 {
344 .bNumInterfaces = 1,
345 .bConfigurationValue = 1,
346 .iConfiguration = STR_CONFIG_HIGH,
347 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP,
348 .bMaxPower = 2,
349 .nif = 1,
350 .ifs = &desc_iface_high,
351 },
352 },
353};
354
355static const USBDescMSOS desc_msos = {
356 .CompatibleID = "MTP",
357 .SelectiveSuspendEnabled = true,
358};
359
360static const USBDesc desc = {
361 .id = {
362 .idVendor = 0x46f4, /* CRC16() of "QEMU" */
363 .idProduct = 0x0004,
364 .bcdDevice = 0,
365 .iManufacturer = STR_MANUFACTURER,
366 .iProduct = STR_PRODUCT,
367 .iSerialNumber = STR_SERIALNUMBER,
368 },
369 .full = &desc_device_full,
370 .high = &desc_device_high,
371 .str = desc_strings,
372 .msos = &desc_msos,
373};
374
375/* ----------------------------------------------------------------------- */
376
377static MTPObject *usb_mtp_object_alloc(MTPState *s, uint32_t handle,
888e0359 378 MTPObject *parent, const char *name)
840a178c
GH		 379{
380 MTPObject *o = g_new0(MTPObject, 1);
381
382 if (name[0] == '.') {
383 goto ignore;
384 }
385
47287c27 386 o->watchid = -1;
840a178c
GH		 387 o->handle = handle;
388 o->parent = parent;
389 o->name = g_strdup(name);
840a178c
GH		 390 if (parent == NULL) {
391 o->path = g_strdup(name);
392 } else {
393 o->path = g_strdup_printf("%s/%s", parent->path, name);
394 }
395
396 if (lstat(o->path, &o->stat) != 0) {
397 goto ignore;
398 }
399 if (S_ISREG(o->stat.st_mode)) {
400 o->format = FMT_UNDEFINED_OBJECT;
401 } else if (S_ISDIR(o->stat.st_mode)) {
402 o->format = FMT_ASSOCIATION;
403 } else {
404 goto ignore;
405 }
406
407 if (access(o->path, R_OK) != 0) {
408 goto ignore;
409 }
410
1c76551f 411 trace_usb_mtp_object_alloc(s->dev.addr, o->handle, o->path);
840a178c
GH		 412
413 QTAILQ_INSERT_TAIL(&s->objects, o, next);
414 return o;
415
416ignore:
417 g_free(o->name);
418 g_free(o->path);
419 g_free(o);
420 return NULL;
421}
422
423static void usb_mtp_object_free(MTPState *s, MTPObject *o)
424{
4c7a67f5
BD		 425 MTPObject *iter;
426
427 if (!o) {
428 return;
429 }
840a178c 430
1c76551f 431 trace_usb_mtp_object_free(s->dev.addr, o->handle, o->path);
840a178c 432
47287c27
DB		 433 if (o->watchid != -1 && s->file_monitor) {
434 qemu_file_monitor_remove_watch(s->file_monitor, o->path, o->watchid);
435 }
436
840a178c 437 QTAILQ_REMOVE(&s->objects, o, next);
4c7a67f5
BD		 438 if (o->parent) {
439 QLIST_REMOVE(o, list);
440 o->parent->nchildren--;
441 }
442
443 while (!QLIST_EMPTY(&o->children)) {
444 iter = QLIST_FIRST(&o->children);
445 usb_mtp_object_free(s, iter);
840a178c 446 }
840a178c
GH		 447 g_free(o->name);
448 g_free(o->path);
449 g_free(o);
450}
451
452static MTPObject *usb_mtp_object_lookup(MTPState *s, uint32_t handle)
453{
454 MTPObject *o;
455
456 QTAILQ_FOREACH(o, &s->objects, next) {
457 if (o->handle == handle) {
458 return o;
459 }
460 }
461 return NULL;
462}
463
4c7a67f5 464static MTPObject *usb_mtp_add_child(MTPState *s, MTPObject *o,
888e0359 465 const char *name)
4c7a67f5
BD		 466{
467 MTPObject *child =
468 usb_mtp_object_alloc(s, s->next_handle++, o, name);
469
470 if (child) {
471 trace_usb_mtp_add_child(s->dev.addr, child->handle, child->path);
472 QLIST_INSERT_HEAD(&o->children, child, list);
473 o->nchildren++;
474
475 if (child->format == FMT_ASSOCIATION) {
476 QLIST_INIT(&child->children);
477 }
478 }
479
480 return child;
481}
482
8e3e3897 483static MTPObject *usb_mtp_object_lookup_name(MTPObject *parent,
888e0359 484 const char *name, int len)
8e3e3897
BD		 485{
486 MTPObject *iter;
487
47287c27
DB		 488 if (len == -1) {
489 len = strlen(name);
490 }
491
8e3e3897
BD		 492 QLIST_FOREACH(iter, &parent->children, list) {
493 if (strncmp(iter->name, name, len) == 0) {
494 return iter;
495 }
496 }
497
498 return NULL;
499}
500
47287c27 501static MTPObject *usb_mtp_object_lookup_id(MTPState *s, int id)
8e3e3897
BD		 502{
503 MTPObject *iter;
504
505 QTAILQ_FOREACH(iter, &s->objects, next) {
47287c27 506 if (iter->watchid == id) {
8e3e3897
BD		 507 return iter;
508 }
509 }
510
511 return NULL;
512}
513
47287c27
DB		 514static void file_monitor_event(int id,
515 QFileMonitorEvent ev,
516 const char *name,
517 void *opaque)
8e3e3897 518{
47287c27
DB		 519 MTPState *s = opaque;
520 MTPObject *parent = usb_mtp_object_lookup_id(s, id);
521 MTPMonEntry *entry = NULL;
522 MTPObject *o;
523
524 if (!parent) {
525 return;
526 }
527
528 switch (ev) {
529 case QFILE_MONITOR_EVENT_CREATED:
530 if (usb_mtp_object_lookup_name(parent, name, -1)) {
531 /* Duplicate create event */
8e3e3897
BD		 532 return;
533 }
47287c27
DB		 534 entry = g_new0(MTPMonEntry, 1);
535 entry->handle = s->next_handle;
536 entry->event = EVT_OBJ_ADDED;
537 o = usb_mtp_add_child(s, parent, name);
538 if (!o) {
539 g_free(entry);
540 return;
541 }
542 trace_usb_mtp_file_monitor_event(s->dev.addr, name, "Obj Added");
543 break;
8e3e3897 544
47287c27 545 case QFILE_MONITOR_EVENT_DELETED:
8e3e3897 546 /*
47287c27
DB		 547 * The kernel issues a IN_IGNORED event
548 * when a dir containing a watchpoint is
549 * deleted, so we don't have to delete the
550 * watchpoint
8e3e3897 551 */
47287c27
DB		 552 o = usb_mtp_object_lookup_name(parent, name, -1);
553 if (!o) {
554 return;
8e3e3897 555 }
47287c27
DB		 556 entry = g_new0(MTPMonEntry, 1);
557 entry->handle = o->handle;
558 entry->event = EVT_OBJ_REMOVED;
559 trace_usb_mtp_file_monitor_event(s->dev.addr, o->path, "Obj Deleted");
560 usb_mtp_object_free(s, o);
561 break;
8e3e3897 562
47287c27
DB		 563 case QFILE_MONITOR_EVENT_MODIFIED:
564 o = usb_mtp_object_lookup_name(parent, name, -1);
565 if (!o) {
566 return;
567 }
568 entry = g_new0(MTPMonEntry, 1);
569 entry->handle = o->handle;
570 entry->event = EVT_OBJ_INFO_CHANGED;
571 trace_usb_mtp_file_monitor_event(s->dev.addr, o->path, "Obj Modified");
572 break;
8e3e3897 573
47287c27
DB		 574 case QFILE_MONITOR_EVENT_IGNORED:
575 trace_usb_mtp_file_monitor_event(s->dev.addr, parent->path,
576 "Obj parent dir ignored");
577 break;
8e3e3897 578
47287c27
DB		 579 case QFILE_MONITOR_EVENT_ATTRIBUTES:
580 break;
8e3e3897 581
47287c27
DB		 582 default:
583 g_assert_not_reached();
584 }
8e3e3897 585
47287c27
DB		 586 if (entry) {
587 QTAILQ_INSERT_HEAD(&s->events, entry, next);
588 }
8e3e3897
BD		 589}
590
47287c27 591static void usb_mtp_file_monitor_cleanup(MTPState *s)
8e3e3897 592{
c22d5dcd 593 MTPMonEntry *e, *p;
8e3e3897 594
c22d5dcd 595 QTAILQ_FOREACH_SAFE(e, &s->events, next, p) {
8e3e3897
BD		 596 QTAILQ_REMOVE(&s->events, e, next);
597 g_free(e);
598 }
8e3e3897 599
47287c27
DB		 600 qemu_file_monitor_free(s->file_monitor);
601 s->file_monitor = NULL;
8e3e3897 602}
47287c27 603
8e3e3897 604
840a178c
GH		 605static void usb_mtp_object_readdir(MTPState *s, MTPObject *o)
606{
607 struct dirent *entry;
608 DIR *dir;
bab9df35 609 int fd;
47287c27 610 Error *err = NULL;
840a178c 611
36084d7e
GH		 612 if (o->have_children) {
613 return;
614 }
615 o->have_children = true;
616
bab9df35
GH		 617 fd = open(o->path, O_DIRECTORY | O_CLOEXEC | O_NOFOLLOW);
618 if (fd < 0) {
619 return;
620 }
621 dir = fdopendir(fd);
840a178c 622 if (!dir) {
6e3c1a68 623 close(fd);
840a178c
GH		 624 return;
625 }
47287c27
DB		 626
627 if (s->file_monitor) {
628 int id = qemu_file_monitor_add_watch(s->file_monitor, o->path, NULL,
629 file_monitor_event, s, &err);
630 if (id == -1) {
631 error_report("usb-mtp: failed to add watch for %s: %s", o->path,
632 error_get_pretty(err));
633 error_free(err);
634 } else {
635 trace_usb_mtp_file_monitor_event(s->dev.addr, o->path,
636 "Watch Added");
637 o->watchid = id;
638 }
8e3e3897 639 }
47287c27 640
840a178c 641 while ((entry = readdir(dir)) != NULL) {
4c7a67f5 642 usb_mtp_add_child(s, o, entry->d_name);
840a178c
GH		 643 }
644 closedir(dir);
645}
646
647/* ----------------------------------------------------------------------- */
648
649static MTPData *usb_mtp_data_alloc(MTPControl *c)
650{
651 MTPData *data = g_new0(MTPData, 1);
652
653 data->code = c->code;
654 data->trans = c->trans;
655 data->fd = -1;
656 data->first = true;
657 return data;
658}
659
660static void usb_mtp_data_free(MTPData *data)
661{
662 if (data == NULL) {
663 return;
664 }
665 if (data->fd != -1) {
666 close(data->fd);
667 }
668 g_free(data->data);
669 g_free(data);
670}
671
672static void usb_mtp_realloc(MTPData *data, uint32_t bytes)
673{
674 if (data->length + bytes <= data->alloc) {
675 return;
676 }
677 data->alloc = (data->length + bytes + 0xff) & ~0xff;
678 data->data = g_realloc(data->data, data->alloc);
679}
680
681static void usb_mtp_add_u8(MTPData *data, uint8_t val)
682{
683 usb_mtp_realloc(data, 1);
684 data->data[data->length++] = val;
685}
686
687static void usb_mtp_add_u16(MTPData *data, uint16_t val)
688{
689 usb_mtp_realloc(data, 2);
690 data->data[data->length++] = (val >> 0) & 0xff;
691 data->data[data->length++] = (val >> 8) & 0xff;
692}
693
694static void usb_mtp_add_u32(MTPData *data, uint32_t val)
695{
696 usb_mtp_realloc(data, 4);
697 data->data[data->length++] = (val >> 0) & 0xff;
698 data->data[data->length++] = (val >> 8) & 0xff;
699 data->data[data->length++] = (val >> 16) & 0xff;
700 data->data[data->length++] = (val >> 24) & 0xff;
701}
702
703static void usb_mtp_add_u64(MTPData *data, uint64_t val)
704{
ada435f4 705 usb_mtp_realloc(data, 8);
840a178c
GH		 706 data->data[data->length++] = (val >> 0) & 0xff;
707 data->data[data->length++] = (val >> 8) & 0xff;
708 data->data[data->length++] = (val >> 16) & 0xff;
709 data->data[data->length++] = (val >> 24) & 0xff;
710 data->data[data->length++] = (val >> 32) & 0xff;
711 data->data[data->length++] = (val >> 40) & 0xff;
712 data->data[data->length++] = (val >> 48) & 0xff;
ada435f4 713 data->data[data->length++] = (val >> 56) & 0xff;
840a178c
GH		 714}
715
716static void usb_mtp_add_u16_array(MTPData *data, uint32_t len,
717 const uint16_t *vals)
718{
719 int i;
720
721 usb_mtp_add_u32(data, len);
722 for (i = 0; i < len; i++) {
723 usb_mtp_add_u16(data, vals[i]);
724 }
725}
726
727static void usb_mtp_add_u32_array(MTPData *data, uint32_t len,
728 const uint32_t *vals)
729{
730 int i;
731
732 usb_mtp_add_u32(data, len);
733 for (i = 0; i < len; i++) {
734 usb_mtp_add_u32(data, vals[i]);
735 }
736}
737
738static void usb_mtp_add_wstr(MTPData *data, const wchar_t *str)
739{
740 uint32_t len = wcslen(str);
741 int i;
742
743 if (len > 0) {
744 len++; /* include terminating L'\0' */
745 }
746
747 usb_mtp_add_u8(data, len);
748 for (i = 0; i < len; i++) {
749 usb_mtp_add_u16(data, str[i]);
750 }
751}
752
753static void usb_mtp_add_str(MTPData *data, const char *str)
754{
755 uint32_t len = strlen(str)+1;
e3d60bc7 756 wchar_t *wstr = g_new(wchar_t, len);
840a178c
GH		 757 size_t ret;
758
759 ret = mbstowcs(wstr, str, len);
760 if (ret == -1) {
761 usb_mtp_add_wstr(data, L"Oops");
762 } else {
763 usb_mtp_add_wstr(data, wstr);
764 }
e3d60bc7
PX		 765
766 g_free(wstr);
840a178c
GH		 767}
768
769static void usb_mtp_add_time(MTPData *data, time_t time)
770{
771 char buf[16];
772 struct tm tm;
773
774 gmtime_r(&time, &tm);
775 strftime(buf, sizeof(buf), "%Y%m%dT%H%M%S", &tm);
776 usb_mtp_add_str(data, buf);
777}
778
779/* ----------------------------------------------------------------------- */
780
781static void usb_mtp_queue_result(MTPState *s, uint16_t code, uint32_t trans,
9c727584
BD		 782 int argc, uint32_t arg0, uint32_t arg1,
783 uint32_t arg2)
840a178c
GH		 784{
785 MTPControl *c = g_new0(MTPControl, 1);
786
787 c->code = code;
788 c->trans = trans;
789 c->argc = argc;
790 if (argc > 0) {
791 c->argv[0] = arg0;
792 }
793 if (argc > 1) {
794 c->argv[1] = arg1;
795 }
9c727584
BD		 796 if (argc > 2) {
797 c->argv[2] = arg2;
798 }
840a178c
GH		 799
800 assert(s->result == NULL);
801 s->result = c;
802}
803
804/* ----------------------------------------------------------------------- */
805
806static MTPData *usb_mtp_get_device_info(MTPState *s, MTPControl *c)
807{
808 static const uint16_t ops[] = {
809 CMD_GET_DEVICE_INFO,
810 CMD_OPEN_SESSION,
811 CMD_CLOSE_SESSION,
812 CMD_GET_STORAGE_IDS,
813 CMD_GET_STORAGE_INFO,
814 CMD_GET_NUM_OBJECTS,
815 CMD_GET_OBJECT_HANDLES,
816 CMD_GET_OBJECT_INFO,
ec6206a6 817 CMD_DELETE_OBJECT,
53735bef 818 CMD_SEND_OBJECT_INFO,
88d5f381 819 CMD_SEND_OBJECT,
840a178c
GH		 820 CMD_GET_OBJECT,
821 CMD_GET_PARTIAL_OBJECT,
67f3ef0c
IL		 822 CMD_GET_OBJECT_PROPS_SUPPORTED,
823 CMD_GET_OBJECT_PROP_DESC,
824 CMD_GET_OBJECT_PROP_VALUE,
840a178c
GH		 825 };
826 static const uint16_t fmt[] = {
827 FMT_UNDEFINED_OBJECT,
828 FMT_ASSOCIATION,
829 };
830 MTPData *d = usb_mtp_data_alloc(c);
831
832 trace_usb_mtp_op_get_device_info(s->dev.addr);
833
f7eaed85 834 usb_mtp_add_u16(d, 100);
1f66fe57
IL		 835 usb_mtp_add_u32(d, 0x00000006);
836 usb_mtp_add_u16(d, 0x0064);
840a178c
GH		 837 usb_mtp_add_wstr(d, L"");
838 usb_mtp_add_u16(d, 0x0000);
839
840 usb_mtp_add_u16_array(d, ARRAY_SIZE(ops), ops);
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, 0, NULL);
844 usb_mtp_add_u16_array(d, ARRAY_SIZE(fmt), fmt);
845
846 usb_mtp_add_wstr(d, L"" MTP_MANUFACTURER);
847 usb_mtp_add_wstr(d, L"" MTP_PRODUCT);
848 usb_mtp_add_wstr(d, L"0.1");
9e4eff5b 849 usb_mtp_add_wstr(d, L"0123456789abcdef0123456789abcdef");
840a178c
GH		 850
851 return d;
852}
853
854static MTPData *usb_mtp_get_storage_ids(MTPState *s, MTPControl *c)
855{
856 static const uint32_t ids[] = {
857 QEMU_STORAGE_ID,
858 };
859 MTPData *d = usb_mtp_data_alloc(c);
860
861 trace_usb_mtp_op_get_storage_ids(s->dev.addr);
862
863 usb_mtp_add_u32_array(d, ARRAY_SIZE(ids), ids);
864
865 return d;
866}
867
868static MTPData *usb_mtp_get_storage_info(MTPState *s, MTPControl *c)
869{
870 MTPData *d = usb_mtp_data_alloc(c);
871 struct statvfs buf;
872 int rc;
873
874 trace_usb_mtp_op_get_storage_info(s->dev.addr);
875
876 if (FLAG_SET(s, MTP_FLAG_WRITABLE)) {
877 usb_mtp_add_u16(d, 0x0003);
878 usb_mtp_add_u16(d, 0x0002);
879 usb_mtp_add_u16(d, 0x0000);
880 } else {
881 usb_mtp_add_u16(d, 0x0001);
882 usb_mtp_add_u16(d, 0x0002);
883 usb_mtp_add_u16(d, 0x0001);
884 }
885
886 rc = statvfs(s->root, &buf);
887 if (rc == 0) {
888 usb_mtp_add_u64(d, (uint64_t)buf.f_frsize * buf.f_blocks);
889 usb_mtp_add_u64(d, (uint64_t)buf.f_bavail * buf.f_blocks);
890 usb_mtp_add_u32(d, buf.f_ffree);
891 } else {
892 usb_mtp_add_u64(d, 0xffffffff);
893 usb_mtp_add_u64(d, 0xffffffff);
894 usb_mtp_add_u32(d, 0xffffffff);
895 }
896
897 usb_mtp_add_str(d, s->desc);
898 usb_mtp_add_wstr(d, L"123456789abcdef");
899 return d;
900}
901
902static MTPData *usb_mtp_get_object_handles(MTPState *s, MTPControl *c,
903 MTPObject *o)
904{
905 MTPData *d = usb_mtp_data_alloc(c);
4c7a67f5
BD		 906 uint32_t i = 0, handles[o->nchildren];
907 MTPObject *iter;
840a178c
GH		 908
909 trace_usb_mtp_op_get_object_handles(s->dev.addr, o->handle, o->path);
910
4c7a67f5
BD		 911 QLIST_FOREACH(iter, &o->children, list) {
912 handles[i++] = iter->handle;
840a178c 913 }
4c7a67f5 914 assert(i == o->nchildren);
840a178c
GH		 915 usb_mtp_add_u32_array(d, o->nchildren, handles);
916
917 return d;
918}
919
920static 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);
8a5865f3
IL		 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 }
840a178c
GH		 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
968static 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
bab9df35 975 d->fd = open(o->path, O_RDONLY | O_CLOEXEC | O_NOFOLLOW);
840a178c 976 if (d->fd == -1) {
2dc7fdf3 977 usb_mtp_data_free(d);
840a178c
GH		 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
986static MTPData *usb_mtp_get_partial_object(MTPState *s, MTPControl *c,
987 MTPObject *o)
988{
62713a2e 989 MTPData *d;
840a178c
GH		 990 off_t offset;
991
62713a2e
PMD		 992 if (c->argc <= 2) {
993 return NULL;
994 }
840a178c
GH		 995 trace_usb_mtp_op_get_partial_object(s->dev.addr, o->handle, o->path,
996 c->argv[1], c->argv[2]);
997
62713a2e 998 d = usb_mtp_data_alloc(c);
bab9df35 999 d->fd = open(o->path, O_RDONLY | O_CLOEXEC | O_NOFOLLOW);
840a178c 1000 if (d->fd == -1) {
2dc7fdf3 1001 usb_mtp_data_free(d);
840a178c
GH		 1002 return NULL;
1003 }
1004
1005 offset = c->argv[1];
1006 if (offset > o->stat.st_size) {
1007 offset = o->stat.st_size;
1008 }
68206d73
GH		 1009 if (lseek(d->fd, offset, SEEK_SET) < 0) {
1010 usb_mtp_data_free(d);
1011 return NULL;
1012 }
840a178c
GH		 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
67f3ef0c
IL		 1022static 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
1038static 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
1099static 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:
b12227af 1121 /* Should be persistent between sessions,
67f3ef0c
IL		 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
ec6206a6
BD		 1138/* Return correct return code for a delete event */
1139enum {
1140 ALL_DELETE,
1141 PARTIAL_DELETE,
1142 READ_ONLY,
1143};
1144
1145/* Assumes that children, if any, have been already freed */
1146static void usb_mtp_object_free_one(MTPState *s, MTPObject *o)
1147{
ec6206a6
BD		 1148 assert(o->nchildren == 0);
1149 QTAILQ_REMOVE(&s->objects, o, next);
1150 g_free(o->name);
1151 g_free(o->path);
1152 g_free(o);
ec6206a6
BD		 1153}
1154
1155static int usb_mtp_deletefn(MTPState *s, MTPObject *o, uint32_t trans)
1156{
1157 MTPObject *iter, *iter2;
1158 bool partial_delete = false;
1159 bool success = false;
1160
1161 /*
1162 * TODO: Add support for Protection Status
1163 */
1164
1165 QLIST_FOREACH(iter, &o->children, list) {
1166 if (iter->format == FMT_ASSOCIATION) {
1167 QLIST_FOREACH(iter2, &iter->children, list) {
1168 usb_mtp_deletefn(s, iter2, trans);
1169 }
1170 }
1171 }
1172
1173 if (o->format == FMT_UNDEFINED_OBJECT) {
1174 if (remove(o->path)) {
1175 partial_delete = true;
1176 } else {
1177 usb_mtp_object_free_one(s, o);
1178 success = true;
1179 }
7ddf8374 1180 } else if (o->format == FMT_ASSOCIATION) {
ec6206a6
BD		 1181 if (rmdir(o->path)) {
1182 partial_delete = true;
1183 } else {
1184 usb_mtp_object_free_one(s, o);
1185 success = true;
1186 }
1187 }
1188
1189 if (success && partial_delete) {
1190 return PARTIAL_DELETE;
1191 }
1192 if (!success && partial_delete) {
1193 return READ_ONLY;
1194 }
1195 return ALL_DELETE;
1196}
1197
1198static void usb_mtp_object_delete(MTPState *s, uint32_t handle,
1199 uint32_t format_code, uint32_t trans)
1200{
1201 MTPObject *o;
1202 int ret;
1203
1204 /* Return error if store is read-only */
1205 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) {
1206 usb_mtp_queue_result(s, RES_STORE_READ_ONLY,
1207 trans, 0, 0, 0, 0);
1208 return;
1209 }
1210
1211 if (format_code != 0) {
1212 usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED,
1213 trans, 0, 0, 0, 0);
1214 return;
1215 }
1216
1217 if (handle == 0xFFFFFFF) {
1218 o = QTAILQ_FIRST(&s->objects);
1219 } else {
1220 o = usb_mtp_object_lookup(s, handle);
1221 }
1222 if (o == NULL) {
1223 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1224 trans, 0, 0, 0, 0);
1225 return;
1226 }
1227
1228 ret = usb_mtp_deletefn(s, o, trans);
1229 if (ret == PARTIAL_DELETE) {
1230 usb_mtp_queue_result(s, RES_PARTIAL_DELETE,
1231 trans, 0, 0, 0, 0);
1232 return;
1233 } else if (ret == READ_ONLY) {
1234 usb_mtp_queue_result(s, RES_STORE_READ_ONLY, trans,
1235 0, 0, 0, 0);
1236 return;
1237 } else {
1238 usb_mtp_queue_result(s, RES_OK, trans,
1239 0, 0, 0, 0);
1240 return;
1241 }
1242}
1243
840a178c
GH		 1244static void usb_mtp_command(MTPState *s, MTPControl *c)
1245{
1246 MTPData *data_in = NULL;
53735bef 1247 MTPObject *o = NULL;
840a178c 1248 uint32_t nres = 0, res0 = 0;
47287c27 1249 Error *err = NULL;
840a178c
GH		 1250
1251 /* sanity checks */
1252 if (c->code >= CMD_CLOSE_SESSION && s->session == 0) {
1253 usb_mtp_queue_result(s, RES_SESSION_NOT_OPEN,
9c727584 1254 c->trans, 0, 0, 0, 0);
840a178c
GH		 1255 return;
1256 }
1257
1258 /* process commands */
1259 switch (c->code) {
1260 case CMD_GET_DEVICE_INFO:
1261 data_in = usb_mtp_get_device_info(s, c);
1262 break;
1263 case CMD_OPEN_SESSION:
1264 if (s->session) {
1265 usb_mtp_queue_result(s, RES_SESSION_ALREADY_OPEN,
9c727584 1266 c->trans, 1, s->session, 0, 0);
840a178c
GH		 1267 return;
1268 }
1269 if (c->argv[0] == 0) {
1270 usb_mtp_queue_result(s, RES_INVALID_PARAMETER,
9c727584 1271 c->trans, 0, 0, 0, 0);
840a178c
GH		 1272 return;
1273 }
1274 trace_usb_mtp_op_open_session(s->dev.addr);
1275 s->session = c->argv[0];
1276 usb_mtp_object_alloc(s, s->next_handle++, NULL, s->root);
47287c27
DB		 1277
1278 s->file_monitor = qemu_file_monitor_new(&err);
1279 if (err) {
1280 error_report("usb-mtp: file monitoring init failed: %s",
1281 error_get_pretty(err));
1282 error_free(err);
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
6de02a13 1558static char *utf16_to_str(uint8_t len, uint16_t *arr)
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 */
53735bef
BD		 1566 wstr[count] = (wchar_t)arr[count];
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{
c5ead51f
BD		 1594 int ret = -1;
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
298ac63c 1606static int usb_mtp_write_data(MTPState *s)
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);
298ac63c 1623 return 1;
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);
c1ef0f25
BD		 1630 goto free;
1631 }
1632 d->fd = open(path, O_CREAT | O_WRONLY |
1633 O_CLOEXEC | O_NOFOLLOW, mask);
1634 if (d->fd == -1) {
1635 usb_mtp_queue_result(s, RES_STORE_FULL, d->trans,
1636 0, 0, 0, 0);
1637 goto done;
1638 }
88d5f381 1639
c1ef0f25
BD		 1640 /* Return success if initiator sent 0 sized data */
1641 if (!s->dataset.size) {
1642 goto success;
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) {
88d5f381
BD		 1654 usb_mtp_queue_result(s, RES_STORE_FULL, d->trans,
1655 0, 0, 0, 0);
1656 goto done;
c1ef0f25
BD		 1657 }
1658 if (d->write_status != WRITE_END) {
298ac63c
BD		 1659 g_free(path);
1660 return ret;
c1ef0f25 1661 } else {
c5ead51f
BD		 1662 /*
1663 * Return an incomplete transfer if file size doesn't match
1664 * for < 4G file or if lstat fails which will result in an incorrect
1665 * file size
1666 */
1667 if ((s->dataset.size != 0xFFFFFFFF &&
1668 d->offset != s->dataset.size) ||
1669 usb_mtp_update_object(parent, s->dataset.filename)) {
c1ef0f25
BD		 1670 usb_mtp_queue_result(s, RES_INCOMPLETE_TRANSFER, d->trans,
1671 0, 0, 0, 0);
1672 goto done;
88d5f381 1673 }
88d5f381
BD		 1674 }
1675 }
1676
1677success:
1678 usb_mtp_queue_result(s, RES_OK, d->trans,
1679 0, 0, 0, 0);
1680
1681done:
1682 /*
1683 * The write dataset is kept around and freed only
1684 * on success or if another write request comes in
1685 */
1686 if (d->fd != -1) {
1687 close(d->fd);
298ac63c 1688 d->fd = -1;
88d5f381
BD		 1689 }
1690free:
1691 g_free(s->dataset.filename);
f7c36a75 1692 s->dataset.size = 0;
88d5f381
BD		 1693 g_free(path);
1694 s->write_pending = false;
298ac63c 1695 return ret;
88d5f381
BD		 1696}
1697
90c1a742 1698static void usb_mtp_write_metadata(MTPState *s, uint64_t dlen)
53735bef
BD		 1699{
1700 MTPData *d = s->data_out;
1701 ObjectInfo *dataset = (ObjectInfo *)d->data;
6de02a13 1702 char *filename;
53735bef
BD		 1703 MTPObject *o;
1704 MTPObject *p = usb_mtp_object_lookup(s, s->dataset.parent_handle);
1705 uint32_t next_handle = s->next_handle;
1706
1707 assert(!s->write_pending);
24e8d1fa 1708 assert(p != NULL);
53735bef 1709
90c1a742
MH		 1710 filename = utf16_to_str(MIN(dataset->length,
1711 dlen - offsetof(ObjectInfo, filename)),
1712 dataset->filename);
53735bef 1713
c52d46e0
GH		 1714 if (strchr(filename, '/')) {
1715 usb_mtp_queue_result(s, RES_PARAMETER_NOT_SUPPORTED, d->trans,
1716 0, 0, 0, 0);
8e3759ef 1717 g_free(filename);
c52d46e0
GH		 1718 return;
1719 }
1720
53735bef
BD		 1721 o = usb_mtp_object_lookup_name(p, filename, dataset->length);
1722 if (o != NULL) {
1723 next_handle = o->handle;
1724 }
1725
1726 s->dataset.filename = filename;
1727 s->dataset.format = dataset->format;
1728 s->dataset.size = dataset->size;
53735bef
BD		 1729 s->write_pending = true;
1730
1731 if (s->dataset.format == FMT_ASSOCIATION) {
298ac63c
BD		 1732 if (usb_mtp_write_data(s)) {
1733 /* next_handle will be allocated to the newly created dir */
53735bef
BD		 1734 usb_mtp_queue_result(s, RES_STORE_FULL, d->trans,
1735 0, 0, 0, 0);
1736 return;
1737 }
53735bef
BD		 1738 }
1739
1740 usb_mtp_queue_result(s, RES_OK, d->trans, 3, QEMU_STORAGE_ID,
1741 s->dataset.parent_handle, next_handle);
1742}
1743
88d5f381
BD		 1744static void usb_mtp_get_data(MTPState *s, mtp_container *container,
1745 USBPacket *p)
1746{
1747 MTPData *d = s->data_out;
1748 uint64_t dlen;
1749 uint32_t data_len = p->iov.size;
406f35d7 1750 uint64_t total_len;
88d5f381 1751
3c969a60
BD		 1752 if (!d) {
1753 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, 0,
1754 0, 0, 0, 0);
1755 return;
1756 }
88d5f381
BD		 1757 if (d->first) {
1758 /* Total length of incoming data */
406f35d7 1759 total_len = cpu_to_le32(container->length) - sizeof(mtp_container);
88d5f381
BD		 1760 /* Length of data in this packet */
1761 data_len -= sizeof(mtp_container);
179fcf8a
BD		 1762 if (total_len < MTP_WRITE_BUF_SZ) {
1763 usb_mtp_realloc(d, total_len);
1764 d->length += total_len;
1765 } else {
1766 usb_mtp_realloc(d, MTP_WRITE_BUF_SZ - sizeof(mtp_container));
1767 d->length += MTP_WRITE_BUF_SZ - sizeof(mtp_container);
1768 }
88d5f381
BD		 1769 d->offset = 0;
1770 d->first = false;
3e096650 1771 d->pending = false;
c1ef0f25
BD		 1772 d->data_offset = 0;
1773 d->write_status = WRITE_START;
3e096650
BD		 1774 }
1775
1776 if (d->pending) {
c1ef0f25
BD		 1777 memset(d->data, 0, d->length);
1778 if (d->length != MTP_WRITE_BUF_SZ) {
1779 usb_mtp_realloc(d, MTP_WRITE_BUF_SZ - d->length);
1780 d->length += (MTP_WRITE_BUF_SZ - d->length);
1781 }
3e096650 1782 d->pending = false;
c1ef0f25
BD		 1783 d->write_status = WRITE_CONTINUE;
1784 d->data_offset = 0;
88d5f381
BD		 1785 }
1786
c1ef0f25 1787 if (d->length - d->data_offset > data_len) {
88d5f381
BD		 1788 dlen = data_len;
1789 } else {
c1ef0f25 1790 dlen = d->length - d->data_offset;
88d5f381
BD		 1791 }
1792
1793 switch (d->code) {
53735bef 1794 case CMD_SEND_OBJECT_INFO:
c1ef0f25 1795 usb_packet_copy(p, d->data + d->data_offset, dlen);
53735bef 1796 d->offset += dlen;
c1ef0f25
BD		 1797 d->data_offset += dlen;
1798 if (d->data_offset == d->length) {
53735bef
BD		 1799 /* The operation might have already failed */
1800 if (!s->result) {
90c1a742 1801 usb_mtp_write_metadata(s, dlen);
53735bef
BD		 1802 }
1803 usb_mtp_data_free(s->data_out);
1804 s->data_out = NULL;
1805 return;
1806 }
1807 break;
88d5f381 1808 case CMD_SEND_OBJECT:
c1ef0f25 1809 usb_packet_copy(p, d->data + d->data_offset, dlen);
88d5f381 1810 d->offset += dlen;
c1ef0f25 1811 d->data_offset += dlen;
3e096650
BD		 1812 if ((p->iov.size % 64) || !p->iov.size) {
1813 assert((s->dataset.size == 0xFFFFFFFF) ||
179fcf8a 1814 (s->dataset.size == d->offset));
3e096650 1815
c1ef0f25
BD		 1816 if (d->length == MTP_WRITE_BUF_SZ) {
1817 d->write_status = WRITE_END;
1818 } else {
1819 d->write_status = WRITE_START;
1820 }
88d5f381
BD		 1821 usb_mtp_write_data(s);
1822 usb_mtp_data_free(s->data_out);
1823 s->data_out = NULL;
1824 return;
1825 }
c1ef0f25 1826 if (d->data_offset == d->length) {
3e096650 1827 d->pending = true;
c1ef0f25 1828 usb_mtp_write_data(s);
3e096650 1829 }
88d5f381
BD		 1830 break;
1831 default:
1832 p->status = USB_RET_STALL;
1833 return;
1834 }
1835}
1836
840a178c
GH		 1837static void usb_mtp_handle_data(USBDevice *dev, USBPacket *p)
1838{
7c03a899 1839 MTPState *s = USB_MTP(dev);
840a178c
GH		 1840 MTPControl cmd;
1841 mtp_container container;
1842 uint32_t params[5];
88d5f381 1843 uint16_t container_type;
840a178c
GH		 1844 int i, rc;
1845
1846 switch (p->ep->nr) {
1847 case EP_DATA_IN:
1848 if (s->data_out != NULL) {
1849 /* guest bug */
1850 trace_usb_mtp_stall(s->dev.addr, "awaiting data-out");
1851 p->status = USB_RET_STALL;
1852 return;
1853 }
1854 if (p->iov.size < sizeof(container)) {
1855 trace_usb_mtp_stall(s->dev.addr, "packet too small");
1856 p->status = USB_RET_STALL;
1857 return;
1858 }
1859 if (s->data_in != NULL) {
1860 MTPData *d = s->data_in;
8a5865f3 1861 uint64_t dlen = d->length - d->offset;
840a178c
GH		 1862 if (d->first) {
1863 trace_usb_mtp_data_in(s->dev.addr, d->trans, d->length);
8a5865f3
IL		 1864 if (d->length + sizeof(container) > 0xFFFFFFFF) {
1865 container.length = cpu_to_le32(0xFFFFFFFF);
1866 } else {
1867 container.length =
1868 cpu_to_le32(d->length + sizeof(container));
1869 }
840a178c
GH		 1870 container.type = cpu_to_le16(TYPE_DATA);
1871 container.code = cpu_to_le16(d->code);
1872 container.trans = cpu_to_le32(d->trans);
1873 usb_packet_copy(p, &container, sizeof(container));
1874 d->first = false;
1875 if (dlen > p->iov.size - sizeof(container)) {
1876 dlen = p->iov.size - sizeof(container);
1877 }
1878 } else {
1879 if (dlen > p->iov.size) {
1880 dlen = p->iov.size;
1881 }
1882 }
1883 if (d->fd == -1) {
1884 usb_packet_copy(p, d->data + d->offset, dlen);
1885 } else {
1886 if (d->alloc < p->iov.size) {
1887 d->alloc = p->iov.size;
1888 d->data = g_realloc(d->data, d->alloc);
1889 }
1890 rc = read(d->fd, d->data, dlen);
1891 if (rc != dlen) {
8ebb8763
GH		 1892 memset(d->data, 0, dlen);
1893 s->result->code = RES_INCOMPLETE_TRANSFER;
840a178c
GH		 1894 }
1895 usb_packet_copy(p, d->data, dlen);
1896 }
1897 d->offset += dlen;
1898 if (d->offset == d->length) {
1899 usb_mtp_data_free(s->data_in);
1900 s->data_in = NULL;
1901 }
1902 } else if (s->result != NULL) {
1903 MTPControl *r = s->result;
1904 int length = sizeof(container) + r->argc * sizeof(uint32_t);
1905 if (r->code == RES_OK) {
1906 trace_usb_mtp_success(s->dev.addr, r->trans,
1907 (r->argc > 0) ? r->argv[0] : 0,
1908 (r->argc > 1) ? r->argv[1] : 0);
1909 } else {
1910 trace_usb_mtp_error(s->dev.addr, r->code, r->trans,
1911 (r->argc > 0) ? r->argv[0] : 0,
1912 (r->argc > 1) ? r->argv[1] : 0);
1913 }
1914 container.length = cpu_to_le32(length);
1915 container.type = cpu_to_le16(TYPE_RESPONSE);
1916 container.code = cpu_to_le16(r->code);
1917 container.trans = cpu_to_le32(r->trans);
1918 for (i = 0; i < r->argc; i++) {
1919 params[i] = cpu_to_le32(r->argv[i]);
1920 }
1921 usb_packet_copy(p, &container, sizeof(container));
1922 usb_packet_copy(p, &params, length - sizeof(container));
1923 g_free(s->result);
1924 s->result = NULL;
1925 }
1926 break;
1927 case EP_DATA_OUT:
1928 if (p->iov.size < sizeof(container)) {
1929 trace_usb_mtp_stall(s->dev.addr, "packet too small");
1930 p->status = USB_RET_STALL;
1931 return;
1932 }
24e8d1fa 1933 if ((s->data_out != NULL) && !s->data_out->first) {
88d5f381
BD		 1934 container_type = TYPE_DATA;
1935 } else {
1936 usb_packet_copy(p, &container, sizeof(container));
1937 container_type = le16_to_cpu(container.type);
1938 }
1939 switch (container_type) {
840a178c
GH		 1940 case TYPE_COMMAND:
1941 if (s->data_in || s->data_out || s->result) {
1942 trace_usb_mtp_stall(s->dev.addr, "transaction inflight");
1943 p->status = USB_RET_STALL;
1944 return;
1945 }
1946 cmd.code = le16_to_cpu(container.code);
1947 cmd.argc = (le32_to_cpu(container.length) - sizeof(container))
1948 / sizeof(uint32_t);
1949 cmd.trans = le32_to_cpu(container.trans);
afa82daf
GH		 1950 if (cmd.argc > ARRAY_SIZE(cmd.argv)) {
1951 cmd.argc = ARRAY_SIZE(cmd.argv);
1952 }
1953 if (p->iov.size < sizeof(container) + cmd.argc * sizeof(uint32_t)) {
1954 trace_usb_mtp_stall(s->dev.addr, "packet too small");
1955 p->status = USB_RET_STALL;
1956 return;
1957 }
840a178c
GH		 1958 usb_packet_copy(p, &params, cmd.argc * sizeof(uint32_t));
1959 for (i = 0; i < cmd.argc; i++) {
1960 cmd.argv[i] = le32_to_cpu(params[i]);
1961 }
1962 trace_usb_mtp_command(s->dev.addr, cmd.code, cmd.trans,
1963 (cmd.argc > 0) ? cmd.argv[0] : 0,
1964 (cmd.argc > 1) ? cmd.argv[1] : 0,
1965 (cmd.argc > 2) ? cmd.argv[2] : 0,
1966 (cmd.argc > 3) ? cmd.argv[3] : 0,
1967 (cmd.argc > 4) ? cmd.argv[4] : 0);
1968 usb_mtp_command(s, &cmd);
1969 break;
88d5f381
BD		 1970 case TYPE_DATA:
1971 /* One of the previous transfers has already errored but the
1972 * responder is still sending data associated with it
1973 */
1974 if (s->result != NULL) {
1975 return;
1976 }
1977 usb_mtp_get_data(s, &container, p);
1978 break;
840a178c 1979 default:
9cd04ccf 1980 /* not needed as long as the mtp device is read-only */
840a178c
GH		 1981 p->status = USB_RET_STALL;
1982 return;
1983 }
1984 break;
1985 case EP_EVENT:
93d592e3 1986 if (!QTAILQ_EMPTY(&s->events)) {
eae3eb3e 1987 struct MTPMonEntry *e = QTAILQ_LAST(&s->events);
93d592e3
BD		 1988 uint32_t handle;
1989 int len = sizeof(container) + sizeof(uint32_t);
1990
1991 if (p->iov.size < len) {
1992 trace_usb_mtp_stall(s->dev.addr,
1993 "packet too small to send event");
1994 p->status = USB_RET_STALL;
1995 return;
1996 }
1997
1998 QTAILQ_REMOVE(&s->events, e, next);
1999 container.length = cpu_to_le32(len);
2000 container.type = cpu_to_le32(TYPE_EVENT);
2001 container.code = cpu_to_le16(e->event);
2002 container.trans = 0; /* no trans specific events */
2003 handle = cpu_to_le32(e->handle);
2004 usb_packet_copy(p, &container, sizeof(container));
2005 usb_packet_copy(p, &handle, sizeof(uint32_t));
2006 g_free(e);
2007 return;
2008 }
840a178c
GH		 2009 p->status = USB_RET_NAK;
2010 return;
2011 default:
2012 trace_usb_mtp_stall(s->dev.addr, "invalid endpoint");
2013 p->status = USB_RET_STALL;
2014 return;
2015 }
2016
2017 if (p->actual_length == 0) {
2018 trace_usb_mtp_nak(s->dev.addr, p->ep->nr);
2019 p->status = USB_RET_NAK;
2020 return;
2021 } else {
2022 trace_usb_mtp_xfer(s->dev.addr, p->ep->nr, p->actual_length,
2023 p->iov.size);
2024 return;
2025 }
2026}
2027
df9bb666 2028static void usb_mtp_realize(USBDevice *dev, Error **errp)
840a178c 2029{
7c03a899 2030 MTPState *s = USB_MTP(dev);
840a178c
GH		 2031
2032 usb_desc_create_serial(dev);
2033 usb_desc_init(dev);
2034 QTAILQ_INIT(&s->objects);
2035 if (s->desc == NULL) {
e60baebd 2036 if (s->root == NULL) {
15aa757d 2037 error_setg(errp, "usb-mtp: rootdir property must be configured");
e60baebd
GA		 2038 return;
2039 }
840a178c 2040 s->desc = strrchr(s->root, '/');
457d397a 2041 if (s->desc && s->desc[0]) {
840a178c
GH		 2042 s->desc = g_strdup(s->desc + 1);
2043 } else {
2044 s->desc = g_strdup("none");
2045 }
2046 }
2392ae6b
BD		 2047 /* Mark store as RW */
2048 if (!s->readonly) {
2049 s->flags |= (1 << MTP_FLAG_WRITABLE);
2050 }
2051
840a178c
GH		 2052}
2053
2054static const VMStateDescription vmstate_usb_mtp = {
2055 .name = "usb-mtp",
2056 .unmigratable = 1,
2057 .version_id = 1,
2058 .minimum_version_id = 1,
2059 .fields = (VMStateField[]) {
2060 VMSTATE_USB_DEVICE(dev, MTPState),
2061 VMSTATE_END_OF_LIST()
2062 }
2063};
2064
2065static Property mtp_properties[] = {
15aa757d 2066 DEFINE_PROP_STRING("rootdir", MTPState, root),
840a178c 2067 DEFINE_PROP_STRING("desc", MTPState, desc),
ec6206a6 2068 DEFINE_PROP_BOOL("readonly", MTPState, readonly, true),
840a178c
GH		 2069 DEFINE_PROP_END_OF_LIST(),
2070};
2071
2072static void usb_mtp_class_initfn(ObjectClass *klass, void *data)
2073{
2074 DeviceClass *dc = DEVICE_CLASS(klass);
2075 USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
2076
df9bb666 2077 uc->realize = usb_mtp_realize;
840a178c
GH		 2078 uc->product_desc = "QEMU USB MTP";
2079 uc->usb_desc = &desc;
2080 uc->cancel_packet = usb_mtp_cancel_packet;
2081 uc->handle_attach = usb_desc_attach;
2082 uc->handle_reset = usb_mtp_handle_reset;
2083 uc->handle_control = usb_mtp_handle_control;
2084 uc->handle_data = usb_mtp_handle_data;
cdab4dc0
TH		 2085 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
2086 dc->desc = "USB Media Transfer Protocol device";
840a178c
GH		 2087 dc->fw_name = "mtp";
2088 dc->vmsd = &vmstate_usb_mtp;
2089 dc->props = mtp_properties;
2090}
2091
2092static TypeInfo mtp_info = {
7c03a899 2093 .name = TYPE_USB_MTP,
840a178c
GH		 2094 .parent = TYPE_USB_DEVICE,
2095 .instance_size = sizeof(MTPState),
2096 .class_init = usb_mtp_class_initfn,
2097};
2098
2099static void usb_mtp_register_types(void)
2100{
2101 type_register_static(&mtp_info);
2102}
2103
2104type_init(usb_mtp_register_types)
Empty description
This page took 0.542602 seconds and 4 git commands to generate.