Merge remote-tracking branch 'remotes/vivier2/tags/linux-user-for-4.1-pull-request...
[qemu.git] / hw / usb / dev-mtp.c
1 /*
2 * Media Transfer Protocol implementation, backed by host filesystem.
3 *
4 * Copyright Red Hat, Inc 2014
5 *
6 * Author:
7 * Gerd Hoffmann <kraxel@redhat.com>
8 *
9 * This code is licensed under the GPL v2 or later.
10 */
11
12 #include "qemu/osdep.h"
13 #include "qapi/error.h"
14 #include "qemu/error-report.h"
15 #include <wchar.h>
16 #include <dirent.h>
17
18 #include <sys/statvfs.h>
19
20
21 #include "qemu-common.h"
22 #include "qemu/iov.h"
23 #include "qemu/filemonitor.h"
24 #include "trace.h"
25 #include "hw/usb.h"
26 #include "desc.h"
27 #include "qemu/units.h"
28
29 /* ----------------------------------------------------------------------- */
30
31 enum mtp_container_type {
32 TYPE_COMMAND = 1,
33 TYPE_DATA = 2,
34 TYPE_RESPONSE = 3,
35 TYPE_EVENT = 4,
36 };
37
38 /* MTP write stage, for internal use only */
39 enum mtp_write_status {
40 WRITE_START = 1,
41 WRITE_CONTINUE = 2,
42 WRITE_END = 3,
43 };
44
45 enum 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,
56 CMD_DELETE_OBJECT = 0x100b,
57 CMD_SEND_OBJECT_INFO = 0x100c,
58 CMD_SEND_OBJECT = 0x100d,
59 CMD_GET_PARTIAL_OBJECT = 0x101b,
60 CMD_GET_OBJECT_PROPS_SUPPORTED = 0x9801,
61 CMD_GET_OBJECT_PROP_DESC = 0x9802,
62 CMD_GET_OBJECT_PROP_VALUE = 0x9803,
63
64 /* response codes */
65 RES_OK = 0x2001,
66 RES_GENERAL_ERROR = 0x2002,
67 RES_SESSION_NOT_OPEN = 0x2003,
68 RES_INVALID_TRANSACTION_ID = 0x2004,
69 RES_OPERATION_NOT_SUPPORTED = 0x2005,
70 RES_PARAMETER_NOT_SUPPORTED = 0x2006,
71 RES_INCOMPLETE_TRANSFER = 0x2007,
72 RES_INVALID_STORAGE_ID = 0x2008,
73 RES_INVALID_OBJECT_HANDLE = 0x2009,
74 RES_INVALID_OBJECT_FORMAT_CODE = 0x200b,
75 RES_STORE_FULL = 0x200c,
76 RES_STORE_READ_ONLY = 0x200e,
77 RES_PARTIAL_DELETE = 0x2012,
78 RES_STORE_NOT_AVAILABLE = 0x2013,
79 RES_SPEC_BY_FORMAT_UNSUPPORTED = 0x2014,
80 RES_INVALID_OBJECTINFO = 0x2015,
81 RES_DESTINATION_UNSUPPORTED = 0x2020,
82 RES_INVALID_PARENT_OBJECT = 0x201a,
83 RES_INVALID_PARAMETER = 0x201d,
84 RES_SESSION_ALREADY_OPEN = 0x201e,
85 RES_INVALID_OBJECT_PROP_CODE = 0xA801,
86
87 /* format codes */
88 FMT_UNDEFINED_OBJECT = 0x3000,
89 FMT_ASSOCIATION = 0x3001,
90
91 /* event codes */
92 EVT_CANCEL_TRANSACTION = 0x4001,
93 EVT_OBJ_ADDED = 0x4002,
94 EVT_OBJ_REMOVED = 0x4003,
95 EVT_OBJ_INFO_CHANGED = 0x4007,
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
106 enum 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,
112 };
113
114 typedef 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
123 typedef struct MTPState MTPState;
124 typedef struct MTPControl MTPControl;
125 typedef struct MTPData MTPData;
126 typedef struct MTPObject MTPObject;
127
128 enum {
129 EP_DATA_IN = 1,
130 EP_DATA_OUT,
131 EP_EVENT,
132 };
133
134 typedef struct MTPMonEntry MTPMonEntry;
135
136 struct MTPMonEntry {
137 uint32_t event;
138 uint32_t handle;
139
140 QTAILQ_ENTRY(MTPMonEntry) next;
141 };
142
143 struct MTPControl {
144 uint16_t code;
145 uint32_t trans;
146 int argc;
147 uint32_t argv[5];
148 };
149
150 struct MTPData {
151 uint16_t code;
152 uint32_t trans;
153 uint64_t offset;
154 uint64_t length;
155 uint64_t alloc;
156 uint8_t *data;
157 bool first;
158 /* Used for >4G file sizes */
159 bool pending;
160 int fd;
161 uint8_t write_status;
162 /* Internal pointer per every MTP_WRITE_BUF_SZ */
163 uint64_t data_offset;
164 };
165
166 struct MTPObject {
167 uint32_t handle;
168 uint16_t format;
169 char *name;
170 char *path;
171 struct stat stat;
172 /* file monitor watch id */
173 int64_t watchid;
174 MTPObject *parent;
175 uint32_t nchildren;
176 QLIST_HEAD(, MTPObject) children;
177 QLIST_ENTRY(MTPObject) list;
178 bool have_children;
179 QTAILQ_ENTRY(MTPObject) next;
180 };
181
182 struct 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;
193 bool readonly;
194
195 QTAILQ_HEAD(, MTPObject) objects;
196 QFileMonitor *file_monitor;
197 QTAILQ_HEAD(, MTPMonEntry) events;
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;
206 };
207
208 /*
209 * ObjectInfo dataset received from initiator
210 * Fields we don't care about are ignored
211 */
212 typedef 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 uint8_t filename[0]; /* UTF-16 encoded */
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
236 #define TYPE_USB_MTP "usb-mtp"
237 #define USB_MTP(obj) OBJECT_CHECK(MTPState, (obj), TYPE_USB_MTP)
238
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"
249 #define MTP_WRITE_BUF_SZ (512 * KiB)
250
251 enum {
252 STR_MANUFACTURER = 1,
253 STR_PRODUCT,
254 STR_SERIALNUMBER,
255 STR_MTP,
256 STR_CONFIG_FULL,
257 STR_CONFIG_HIGH,
258 STR_CONFIG_SUPER,
259 };
260
261 static const USBDescStrings desc_strings = {
262 [STR_MANUFACTURER] = MTP_MANUFACTURER,
263 [STR_PRODUCT] = MTP_PRODUCT,
264 [STR_SERIALNUMBER] = "34617",
265 [STR_MTP] = "MTP",
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
271 static const USBDescIface desc_iface_full = {
272 .bInterfaceNumber = 0,
273 .bNumEndpoints = 3,
274 .bInterfaceClass = USB_CLASS_STILL_IMAGE,
275 .bInterfaceSubClass = 0x01,
276 .bInterfaceProtocol = 0x01,
277 .iInterface = STR_MTP,
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,
290 .wMaxPacketSize = 64,
291 .bInterval = 0x0a,
292 },
293 }
294 };
295
296 static 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
313 static const USBDescIface desc_iface_high = {
314 .bInterfaceNumber = 0,
315 .bNumEndpoints = 3,
316 .bInterfaceClass = USB_CLASS_STILL_IMAGE,
317 .bInterfaceSubClass = 0x01,
318 .bInterfaceProtocol = 0x01,
319 .iInterface = STR_MTP,
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,
332 .wMaxPacketSize = 64,
333 .bInterval = 0x0a,
334 },
335 }
336 };
337
338 static 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
355 static const USBDescMSOS desc_msos = {
356 .CompatibleID = "MTP",
357 .SelectiveSuspendEnabled = true,
358 };
359
360 static 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
377 static MTPObject *usb_mtp_object_alloc(MTPState *s, uint32_t handle,
378 MTPObject *parent, const char *name)
379 {
380 MTPObject *o = g_new0(MTPObject, 1);
381
382 if (name[0] == '.') {
383 goto ignore;
384 }
385
386 o->watchid = -1;
387 o->handle = handle;
388 o->parent = parent;
389 o->name = g_strdup(name);
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
411 trace_usb_mtp_object_alloc(s->dev.addr, o->handle, o->path);
412
413 QTAILQ_INSERT_TAIL(&s->objects, o, next);
414 return o;
415
416 ignore:
417 g_free(o->name);
418 g_free(o->path);
419 g_free(o);
420 return NULL;
421 }
422
423 static void usb_mtp_object_free(MTPState *s, MTPObject *o)
424 {
425 MTPObject *iter;
426
427 if (!o) {
428 return;
429 }
430
431 trace_usb_mtp_object_free(s->dev.addr, o->handle, o->path);
432
433 if (o->watchid != -1 && s->file_monitor) {
434 qemu_file_monitor_remove_watch(s->file_monitor, o->path, o->watchid);
435 }
436
437 QTAILQ_REMOVE(&s->objects, o, next);
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);
446 }
447 g_free(o->name);
448 g_free(o->path);
449 g_free(o);
450 }
451
452 static 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
464 static MTPObject *usb_mtp_add_child(MTPState *s, MTPObject *o,
465 const char *name)
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
483 static MTPObject *usb_mtp_object_lookup_name(MTPObject *parent,
484 const char *name, int len)
485 {
486 MTPObject *iter;
487
488 if (len == -1) {
489 len = strlen(name);
490 }
491
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
501 static MTPObject *usb_mtp_object_lookup_id(MTPState *s, int64_t id)
502 {
503 MTPObject *iter;
504
505 QTAILQ_FOREACH(iter, &s->objects, next) {
506 if (iter->watchid == id) {
507 return iter;
508 }
509 }
510
511 return NULL;
512 }
513
514 static void file_monitor_event(int64_t id,
515 QFileMonitorEvent ev,
516 const char *name,
517 void *opaque)
518 {
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 */
532 return;
533 }
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;
544
545 case QFILE_MONITOR_EVENT_DELETED:
546 /*
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
551 */
552 o = usb_mtp_object_lookup_name(parent, name, -1);
553 if (!o) {
554 return;
555 }
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;
562
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;
573
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;
578
579 case QFILE_MONITOR_EVENT_ATTRIBUTES:
580 break;
581
582 default:
583 g_assert_not_reached();
584 }
585
586 if (entry) {
587 QTAILQ_INSERT_HEAD(&s->events, entry, next);
588 }
589 }
590
591 static void usb_mtp_file_monitor_cleanup(MTPState *s)
592 {
593 MTPMonEntry *e, *p;
594
595 QTAILQ_FOREACH_SAFE(e, &s->events, next, p) {
596 QTAILQ_REMOVE(&s->events, e, next);
597 g_free(e);
598 }
599
600 qemu_file_monitor_free(s->file_monitor);
601 s->file_monitor = NULL;
602 }
603
604
605 static void usb_mtp_object_readdir(MTPState *s, MTPObject *o)
606 {
607 struct dirent *entry;
608 DIR *dir;
609 int fd;
610 Error *err = NULL;
611
612 if (o->have_children) {
613 return;
614 }
615 o->have_children = true;
616
617 fd = open(o->path, O_DIRECTORY | O_CLOEXEC | O_NOFOLLOW);
618 if (fd < 0) {
619 return;
620 }
621 dir = fdopendir(fd);
622 if (!dir) {
623 close(fd);
624 return;
625 }
626
627 if (s->file_monitor) {
628 int64_t 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 }
639 }
640
641 while ((entry = readdir(dir)) != NULL) {
642 usb_mtp_add_child(s, o, entry->d_name);
643 }
644 closedir(dir);
645 }
646
647 /* ----------------------------------------------------------------------- */
648
649 static 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
660 static 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
672 static 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
681 static 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
687 static 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
694 static 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
703 static void usb_mtp_add_u64(MTPData *data, uint64_t val)
704 {
705 usb_mtp_realloc(data, 8);
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;
713 data->data[data->length++] = (val >> 56) & 0xff;
714 }
715
716 static 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
727 static 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
738 static 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
753 static void usb_mtp_add_str(MTPData *data, const char *str)
754 {
755 uint32_t len = strlen(str)+1;
756 wchar_t *wstr = g_new(wchar_t, len);
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 }
765
766 g_free(wstr);
767 }
768
769 static 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
781 static void usb_mtp_queue_result(MTPState *s, uint16_t code, uint32_t trans,
782 int argc, uint32_t arg0, uint32_t arg1,
783 uint32_t arg2)
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 }
796 if (argc > 2) {
797 c->argv[2] = arg2;
798 }
799
800 assert(s->result == NULL);
801 s->result = c;
802 }
803
804 /* ----------------------------------------------------------------------- */
805
806 static 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,
817 CMD_DELETE_OBJECT,
818 CMD_SEND_OBJECT_INFO,
819 CMD_SEND_OBJECT,
820 CMD_GET_OBJECT,
821 CMD_GET_PARTIAL_OBJECT,
822 CMD_GET_OBJECT_PROPS_SUPPORTED,
823 CMD_GET_OBJECT_PROP_DESC,
824 CMD_GET_OBJECT_PROP_VALUE,
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
834 usb_mtp_add_u16(d, 100);
835 usb_mtp_add_u32(d, 0x00000006);
836 usb_mtp_add_u16(d, 0x0064);
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");
849 usb_mtp_add_wstr(d, L"0123456789abcdef0123456789abcdef");
850
851 return d;
852 }
853
854 static 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
868 static 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
902 static MTPData *usb_mtp_get_object_handles(MTPState *s, MTPControl *c,
903 MTPObject *o)
904 {
905 MTPData *d = usb_mtp_data_alloc(c);
906 uint32_t i = 0, handles[o->nchildren];
907 MTPObject *iter;
908
909 trace_usb_mtp_op_get_object_handles(s->dev.addr, o->handle, o->path);
910
911 QLIST_FOREACH(iter, &o->children, list) {
912 handles[i++] = iter->handle;
913 }
914 assert(i == o->nchildren);
915 usb_mtp_add_u32_array(d, o->nchildren, handles);
916
917 return d;
918 }
919
920 static MTPData *usb_mtp_get_object_info(MTPState *s, MTPControl *c,
921 MTPObject *o)
922 {
923 MTPData *d = usb_mtp_data_alloc(c);
924
925 trace_usb_mtp_op_get_object_info(s->dev.addr, o->handle, o->path);
926
927 usb_mtp_add_u32(d, QEMU_STORAGE_ID);
928 usb_mtp_add_u16(d, o->format);
929 usb_mtp_add_u16(d, 0);
930
931 if (o->stat.st_size > 0xFFFFFFFF) {
932 usb_mtp_add_u32(d, 0xFFFFFFFF);
933 } else {
934 usb_mtp_add_u32(d, o->stat.st_size);
935 }
936
937 usb_mtp_add_u16(d, 0);
938 usb_mtp_add_u32(d, 0);
939 usb_mtp_add_u32(d, 0);
940 usb_mtp_add_u32(d, 0);
941 usb_mtp_add_u32(d, 0);
942 usb_mtp_add_u32(d, 0);
943 usb_mtp_add_u32(d, 0);
944
945 if (o->parent) {
946 usb_mtp_add_u32(d, o->parent->handle);
947 } else {
948 usb_mtp_add_u32(d, 0);
949 }
950 if (o->format == FMT_ASSOCIATION) {
951 usb_mtp_add_u16(d, 0x0001);
952 usb_mtp_add_u32(d, 0x00000001);
953 usb_mtp_add_u32(d, 0);
954 } else {
955 usb_mtp_add_u16(d, 0);
956 usb_mtp_add_u32(d, 0);
957 usb_mtp_add_u32(d, 0);
958 }
959
960 usb_mtp_add_str(d, o->name);
961 usb_mtp_add_time(d, o->stat.st_ctime);
962 usb_mtp_add_time(d, o->stat.st_mtime);
963 usb_mtp_add_wstr(d, L"");
964
965 return d;
966 }
967
968 static MTPData *usb_mtp_get_object(MTPState *s, MTPControl *c,
969 MTPObject *o)
970 {
971 MTPData *d = usb_mtp_data_alloc(c);
972
973 trace_usb_mtp_op_get_object(s->dev.addr, o->handle, o->path);
974
975 d->fd = open(o->path, O_RDONLY | O_CLOEXEC | O_NOFOLLOW);
976 if (d->fd == -1) {
977 usb_mtp_data_free(d);
978 return NULL;
979 }
980 d->length = o->stat.st_size;
981 d->alloc = 512;
982 d->data = g_malloc(d->alloc);
983 return d;
984 }
985
986 static MTPData *usb_mtp_get_partial_object(MTPState *s, MTPControl *c,
987 MTPObject *o)
988 {
989 MTPData *d;
990 off_t offset;
991
992 if (c->argc <= 2) {
993 return NULL;
994 }
995 trace_usb_mtp_op_get_partial_object(s->dev.addr, o->handle, o->path,
996 c->argv[1], c->argv[2]);
997
998 d = usb_mtp_data_alloc(c);
999 d->fd = open(o->path, O_RDONLY | O_CLOEXEC | O_NOFOLLOW);
1000 if (d->fd == -1) {
1001 usb_mtp_data_free(d);
1002 return NULL;
1003 }
1004
1005 offset = c->argv[1];
1006 if (offset > o->stat.st_size) {
1007 offset = o->stat.st_size;
1008 }
1009 if (lseek(d->fd, offset, SEEK_SET) < 0) {
1010 usb_mtp_data_free(d);
1011 return NULL;
1012 }
1013
1014 d->length = c->argv[2];
1015 if (d->length > o->stat.st_size - offset) {
1016 d->length = o->stat.st_size - offset;
1017 }
1018
1019 return d;
1020 }
1021
1022 static MTPData *usb_mtp_get_object_props_supported(MTPState *s, MTPControl *c)
1023 {
1024 static const uint16_t props[] = {
1025 PROP_STORAGE_ID,
1026 PROP_OBJECT_FORMAT,
1027 PROP_OBJECT_COMPRESSED_SIZE,
1028 PROP_PARENT_OBJECT,
1029 PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER,
1030 PROP_NAME,
1031 };
1032 MTPData *d = usb_mtp_data_alloc(c);
1033 usb_mtp_add_u16_array(d, ARRAY_SIZE(props), props);
1034
1035 return d;
1036 }
1037
1038 static MTPData *usb_mtp_get_object_prop_desc(MTPState *s, MTPControl *c)
1039 {
1040 MTPData *d = usb_mtp_data_alloc(c);
1041 switch (c->argv[0]) {
1042 case PROP_STORAGE_ID:
1043 usb_mtp_add_u16(d, PROP_STORAGE_ID);
1044 usb_mtp_add_u16(d, DATA_TYPE_UINT32);
1045 usb_mtp_add_u8(d, 0x00);
1046 usb_mtp_add_u32(d, 0x00000000);
1047 usb_mtp_add_u32(d, 0x00000000);
1048 usb_mtp_add_u8(d, 0x00);
1049 break;
1050 case PROP_OBJECT_FORMAT:
1051 usb_mtp_add_u16(d, PROP_OBJECT_FORMAT);
1052 usb_mtp_add_u16(d, DATA_TYPE_UINT16);
1053 usb_mtp_add_u8(d, 0x00);
1054 usb_mtp_add_u16(d, 0x0000);
1055 usb_mtp_add_u32(d, 0x00000000);
1056 usb_mtp_add_u8(d, 0x00);
1057 break;
1058 case PROP_OBJECT_COMPRESSED_SIZE:
1059 usb_mtp_add_u16(d, PROP_OBJECT_COMPRESSED_SIZE);
1060 usb_mtp_add_u16(d, DATA_TYPE_UINT64);
1061 usb_mtp_add_u8(d, 0x00);
1062 usb_mtp_add_u64(d, 0x0000000000000000);
1063 usb_mtp_add_u32(d, 0x00000000);
1064 usb_mtp_add_u8(d, 0x00);
1065 break;
1066 case PROP_PARENT_OBJECT:
1067 usb_mtp_add_u16(d, PROP_PARENT_OBJECT);
1068 usb_mtp_add_u16(d, DATA_TYPE_UINT32);
1069 usb_mtp_add_u8(d, 0x00);
1070 usb_mtp_add_u32(d, 0x00000000);
1071 usb_mtp_add_u32(d, 0x00000000);
1072 usb_mtp_add_u8(d, 0x00);
1073 break;
1074 case PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER:
1075 usb_mtp_add_u16(d, PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER);
1076 usb_mtp_add_u16(d, DATA_TYPE_UINT128);
1077 usb_mtp_add_u8(d, 0x00);
1078 usb_mtp_add_u64(d, 0x0000000000000000);
1079 usb_mtp_add_u64(d, 0x0000000000000000);
1080 usb_mtp_add_u32(d, 0x00000000);
1081 usb_mtp_add_u8(d, 0x00);
1082 break;
1083 case PROP_NAME:
1084 usb_mtp_add_u16(d, PROP_NAME);
1085 usb_mtp_add_u16(d, DATA_TYPE_STRING);
1086 usb_mtp_add_u8(d, 0x00);
1087 usb_mtp_add_u8(d, 0x00);
1088 usb_mtp_add_u32(d, 0x00000000);
1089 usb_mtp_add_u8(d, 0x00);
1090 break;
1091 default:
1092 usb_mtp_data_free(d);
1093 return NULL;
1094 }
1095
1096 return d;
1097 }
1098
1099 static MTPData *usb_mtp_get_object_prop_value(MTPState *s, MTPControl *c,
1100 MTPObject *o)
1101 {
1102 MTPData *d = usb_mtp_data_alloc(c);
1103 switch (c->argv[1]) {
1104 case PROP_STORAGE_ID:
1105 usb_mtp_add_u32(d, QEMU_STORAGE_ID);
1106 break;
1107 case PROP_OBJECT_FORMAT:
1108 usb_mtp_add_u16(d, o->format);
1109 break;
1110 case PROP_OBJECT_COMPRESSED_SIZE:
1111 usb_mtp_add_u64(d, o->stat.st_size);
1112 break;
1113 case PROP_PARENT_OBJECT:
1114 if (o->parent == NULL) {
1115 usb_mtp_add_u32(d, 0x00000000);
1116 } else {
1117 usb_mtp_add_u32(d, o->parent->handle);
1118 }
1119 break;
1120 case PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER:
1121 /* Should be persistent between sessions,
1122 * but using our objedt ID is "good enough"
1123 * for now */
1124 usb_mtp_add_u64(d, 0x0000000000000000);
1125 usb_mtp_add_u64(d, o->handle);
1126 break;
1127 case PROP_NAME:
1128 usb_mtp_add_str(d, o->name);
1129 break;
1130 default:
1131 usb_mtp_data_free(d);
1132 return NULL;
1133 }
1134
1135 return d;
1136 }
1137
1138 /*
1139 * Return values when object @o is deleted.
1140 * If at least one of the deletions succeeded,
1141 * DELETE_SUCCESS is set and if at least one
1142 * of the deletions failed, DELETE_FAILURE is
1143 * set. Both bits being set (DELETE_PARTIAL)
1144 * signifies a RES_PARTIAL_DELETE being sent
1145 * back to the initiator.
1146 */
1147 enum {
1148 DELETE_SUCCESS = (1 << 0),
1149 DELETE_FAILURE = (1 << 1),
1150 DELETE_PARTIAL = (DELETE_FAILURE | DELETE_SUCCESS),
1151 };
1152
1153 static int usb_mtp_deletefn(MTPState *s, MTPObject *o, uint32_t trans)
1154 {
1155 MTPObject *iter, *iter2;
1156 int ret = 0;
1157
1158 /*
1159 * TODO: Add support for Protection Status
1160 */
1161
1162 QLIST_FOREACH(iter, &o->children, list) {
1163 if (iter->format == FMT_ASSOCIATION) {
1164 QLIST_FOREACH(iter2, &iter->children, list) {
1165 ret |= usb_mtp_deletefn(s, iter2, trans);
1166 }
1167 }
1168 }
1169
1170 if (o->format == FMT_UNDEFINED_OBJECT) {
1171 if (remove(o->path)) {
1172 ret |= DELETE_FAILURE;
1173 } else {
1174 usb_mtp_object_free(s, o);
1175 ret |= DELETE_SUCCESS;
1176 }
1177 } else if (o->format == FMT_ASSOCIATION) {
1178 if (rmdir(o->path)) {
1179 ret |= DELETE_FAILURE;
1180 } else {
1181 usb_mtp_object_free(s, o);
1182 ret |= DELETE_SUCCESS;
1183 }
1184 }
1185
1186 return ret;
1187 }
1188
1189 static void usb_mtp_object_delete(MTPState *s, uint32_t handle,
1190 uint32_t format_code, uint32_t trans)
1191 {
1192 MTPObject *o;
1193 int ret;
1194
1195 /* Return error if store is read-only */
1196 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) {
1197 usb_mtp_queue_result(s, RES_STORE_READ_ONLY,
1198 trans, 0, 0, 0, 0);
1199 return;
1200 }
1201
1202 if (format_code != 0) {
1203 usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED,
1204 trans, 0, 0, 0, 0);
1205 return;
1206 }
1207
1208 if (handle == 0xFFFFFFF) {
1209 o = QTAILQ_FIRST(&s->objects);
1210 } else {
1211 o = usb_mtp_object_lookup(s, handle);
1212 }
1213 if (o == NULL) {
1214 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1215 trans, 0, 0, 0, 0);
1216 return;
1217 }
1218
1219 ret = usb_mtp_deletefn(s, o, trans);
1220 switch (ret) {
1221 case DELETE_SUCCESS:
1222 usb_mtp_queue_result(s, RES_OK, trans,
1223 0, 0, 0, 0);
1224 break;
1225 case DELETE_FAILURE:
1226 usb_mtp_queue_result(s, RES_PARTIAL_DELETE,
1227 trans, 0, 0, 0, 0);
1228 break;
1229 case DELETE_PARTIAL:
1230 usb_mtp_queue_result(s, RES_PARTIAL_DELETE,
1231 trans, 0, 0, 0, 0);
1232 break;
1233 default:
1234 g_assert_not_reached();
1235 }
1236
1237 return;
1238 }
1239
1240 static void usb_mtp_command(MTPState *s, MTPControl *c)
1241 {
1242 MTPData *data_in = NULL;
1243 MTPObject *o = NULL;
1244 uint32_t nres = 0, res0 = 0;
1245 Error *err = NULL;
1246
1247 /* sanity checks */
1248 if (c->code >= CMD_CLOSE_SESSION && s->session == 0) {
1249 usb_mtp_queue_result(s, RES_SESSION_NOT_OPEN,
1250 c->trans, 0, 0, 0, 0);
1251 return;
1252 }
1253
1254 /* process commands */
1255 switch (c->code) {
1256 case CMD_GET_DEVICE_INFO:
1257 data_in = usb_mtp_get_device_info(s, c);
1258 break;
1259 case CMD_OPEN_SESSION:
1260 if (s->session) {
1261 usb_mtp_queue_result(s, RES_SESSION_ALREADY_OPEN,
1262 c->trans, 1, s->session, 0, 0);
1263 return;
1264 }
1265 if (c->argv[0] == 0) {
1266 usb_mtp_queue_result(s, RES_INVALID_PARAMETER,
1267 c->trans, 0, 0, 0, 0);
1268 return;
1269 }
1270 trace_usb_mtp_op_open_session(s->dev.addr);
1271 s->session = c->argv[0];
1272 usb_mtp_object_alloc(s, s->next_handle++, NULL, s->root);
1273
1274 s->file_monitor = qemu_file_monitor_new(&err);
1275 if (err) {
1276 error_report("usb-mtp: file monitoring init failed: %s",
1277 error_get_pretty(err));
1278 error_free(err);
1279 } else {
1280 QTAILQ_INIT(&s->events);
1281 }
1282 break;
1283 case CMD_CLOSE_SESSION:
1284 trace_usb_mtp_op_close_session(s->dev.addr);
1285 s->session = 0;
1286 s->next_handle = 0;
1287 usb_mtp_file_monitor_cleanup(s);
1288 usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects));
1289 assert(QTAILQ_EMPTY(&s->objects));
1290 break;
1291 case CMD_GET_STORAGE_IDS:
1292 data_in = usb_mtp_get_storage_ids(s, c);
1293 break;
1294 case CMD_GET_STORAGE_INFO:
1295 if (c->argv[0] != QEMU_STORAGE_ID &&
1296 c->argv[0] != 0xffffffff) {
1297 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID,
1298 c->trans, 0, 0, 0, 0);
1299 return;
1300 }
1301 data_in = usb_mtp_get_storage_info(s, c);
1302 break;
1303 case CMD_GET_NUM_OBJECTS:
1304 case CMD_GET_OBJECT_HANDLES:
1305 if (c->argv[0] != QEMU_STORAGE_ID &&
1306 c->argv[0] != 0xffffffff) {
1307 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID,
1308 c->trans, 0, 0, 0, 0);
1309 return;
1310 }
1311 if (c->argv[1] != 0x00000000) {
1312 usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED,
1313 c->trans, 0, 0, 0, 0);
1314 return;
1315 }
1316 if (c->argv[2] == 0x00000000 ||
1317 c->argv[2] == 0xffffffff) {
1318 o = QTAILQ_FIRST(&s->objects);
1319 } else {
1320 o = usb_mtp_object_lookup(s, c->argv[2]);
1321 }
1322 if (o == NULL) {
1323 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1324 c->trans, 0, 0, 0, 0);
1325 return;
1326 }
1327 if (o->format != FMT_ASSOCIATION) {
1328 usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT,
1329 c->trans, 0, 0, 0, 0);
1330 return;
1331 }
1332 usb_mtp_object_readdir(s, o);
1333 if (c->code == CMD_GET_NUM_OBJECTS) {
1334 trace_usb_mtp_op_get_num_objects(s->dev.addr, o->handle, o->path);
1335 nres = 1;
1336 res0 = o->nchildren;
1337 } else {
1338 data_in = usb_mtp_get_object_handles(s, c, o);
1339 }
1340 break;
1341 case CMD_GET_OBJECT_INFO:
1342 o = usb_mtp_object_lookup(s, c->argv[0]);
1343 if (o == NULL) {
1344 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1345 c->trans, 0, 0, 0, 0);
1346 return;
1347 }
1348 data_in = usb_mtp_get_object_info(s, c, o);
1349 break;
1350 case CMD_GET_OBJECT:
1351 o = usb_mtp_object_lookup(s, c->argv[0]);
1352 if (o == NULL) {
1353 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1354 c->trans, 0, 0, 0, 0);
1355 return;
1356 }
1357 if (o->format == FMT_ASSOCIATION) {
1358 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1359 c->trans, 0, 0, 0, 0);
1360 return;
1361 }
1362 data_in = usb_mtp_get_object(s, c, o);
1363 if (data_in == NULL) {
1364 usb_mtp_queue_result(s, RES_GENERAL_ERROR,
1365 c->trans, 0, 0, 0, 0);
1366 return;
1367 }
1368 break;
1369 case CMD_DELETE_OBJECT:
1370 usb_mtp_object_delete(s, c->argv[0], c->argv[1], c->trans);
1371 return;
1372 case CMD_GET_PARTIAL_OBJECT:
1373 o = usb_mtp_object_lookup(s, c->argv[0]);
1374 if (o == NULL) {
1375 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1376 c->trans, 0, 0, 0, 0);
1377 return;
1378 }
1379 if (o->format == FMT_ASSOCIATION) {
1380 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1381 c->trans, 0, 0, 0, 0);
1382 return;
1383 }
1384 data_in = usb_mtp_get_partial_object(s, c, o);
1385 if (data_in == NULL) {
1386 usb_mtp_queue_result(s, RES_GENERAL_ERROR,
1387 c->trans, 0, 0, 0, 0);
1388 return;
1389 }
1390 nres = 1;
1391 res0 = data_in->length;
1392 break;
1393 case CMD_SEND_OBJECT_INFO:
1394 /* Return error if store is read-only */
1395 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) {
1396 usb_mtp_queue_result(s, RES_STORE_READ_ONLY,
1397 c->trans, 0, 0, 0, 0);
1398 } else if (c->argv[0] && (c->argv[0] != QEMU_STORAGE_ID)) {
1399 /* First parameter points to storage id or is 0 */
1400 usb_mtp_queue_result(s, RES_STORE_NOT_AVAILABLE, c->trans,
1401 0, 0, 0, 0);
1402 } else if (c->argv[1] && !c->argv[0]) {
1403 /* If second parameter is specified, first must also be specified */
1404 usb_mtp_queue_result(s, RES_DESTINATION_UNSUPPORTED, c->trans,
1405 0, 0, 0, 0);
1406 } else {
1407 uint32_t handle = c->argv[1];
1408 if (handle == 0xFFFFFFFF || handle == 0) {
1409 /* root object */
1410 o = QTAILQ_FIRST(&s->objects);
1411 } else {
1412 o = usb_mtp_object_lookup(s, handle);
1413 }
1414 if (o == NULL) {
1415 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, c->trans,
1416 0, 0, 0, 0);
1417 } else if (o->format != FMT_ASSOCIATION) {
1418 usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT, c->trans,
1419 0, 0, 0, 0);
1420 }
1421 }
1422 if (o) {
1423 s->dataset.parent_handle = o->handle;
1424 }
1425 s->data_out = usb_mtp_data_alloc(c);
1426 return;
1427 case CMD_SEND_OBJECT:
1428 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) {
1429 usb_mtp_queue_result(s, RES_STORE_READ_ONLY,
1430 c->trans, 0, 0, 0, 0);
1431 return;
1432 }
1433 if (!s->write_pending) {
1434 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO,
1435 c->trans, 0, 0, 0, 0);
1436 return;
1437 }
1438 s->data_out = usb_mtp_data_alloc(c);
1439 return;
1440 case CMD_GET_OBJECT_PROPS_SUPPORTED:
1441 if (c->argv[0] != FMT_UNDEFINED_OBJECT &&
1442 c->argv[0] != FMT_ASSOCIATION) {
1443 usb_mtp_queue_result(s, RES_INVALID_OBJECT_FORMAT_CODE,
1444 c->trans, 0, 0, 0, 0);
1445 return;
1446 }
1447 data_in = usb_mtp_get_object_props_supported(s, c);
1448 break;
1449 case CMD_GET_OBJECT_PROP_DESC:
1450 if (c->argv[1] != FMT_UNDEFINED_OBJECT &&
1451 c->argv[1] != FMT_ASSOCIATION) {
1452 usb_mtp_queue_result(s, RES_INVALID_OBJECT_FORMAT_CODE,
1453 c->trans, 0, 0, 0, 0);
1454 return;
1455 }
1456 data_in = usb_mtp_get_object_prop_desc(s, c);
1457 if (data_in == NULL) {
1458 usb_mtp_queue_result(s, RES_INVALID_OBJECT_PROP_CODE,
1459 c->trans, 0, 0, 0, 0);
1460 return;
1461 }
1462 break;
1463 case CMD_GET_OBJECT_PROP_VALUE:
1464 o = usb_mtp_object_lookup(s, c->argv[0]);
1465 if (o == NULL) {
1466 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1467 c->trans, 0, 0, 0, 0);
1468 return;
1469 }
1470 data_in = usb_mtp_get_object_prop_value(s, c, o);
1471 if (data_in == NULL) {
1472 usb_mtp_queue_result(s, RES_INVALID_OBJECT_PROP_CODE,
1473 c->trans, 0, 0, 0, 0);
1474 return;
1475 }
1476 break;
1477 default:
1478 trace_usb_mtp_op_unknown(s->dev.addr, c->code);
1479 usb_mtp_queue_result(s, RES_OPERATION_NOT_SUPPORTED,
1480 c->trans, 0, 0, 0, 0);
1481 return;
1482 }
1483
1484 /* return results on success */
1485 if (data_in) {
1486 assert(s->data_in == NULL);
1487 s->data_in = data_in;
1488 }
1489 usb_mtp_queue_result(s, RES_OK, c->trans, nres, res0, 0, 0);
1490 }
1491
1492 /* ----------------------------------------------------------------------- */
1493
1494 static void usb_mtp_handle_reset(USBDevice *dev)
1495 {
1496 MTPState *s = USB_MTP(dev);
1497
1498 trace_usb_mtp_reset(s->dev.addr);
1499
1500 usb_mtp_file_monitor_cleanup(s);
1501 usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects));
1502 s->session = 0;
1503 usb_mtp_data_free(s->data_in);
1504 s->data_in = NULL;
1505 usb_mtp_data_free(s->data_out);
1506 s->data_out = NULL;
1507 g_free(s->result);
1508 s->result = NULL;
1509 }
1510
1511 static void usb_mtp_handle_control(USBDevice *dev, USBPacket *p,
1512 int request, int value, int index,
1513 int length, uint8_t *data)
1514 {
1515 int ret;
1516 MTPState *s = USB_MTP(dev);
1517 uint16_t *event = (uint16_t *)data;
1518
1519 switch (request) {
1520 case ClassInterfaceOutRequest | 0x64:
1521 if (*event == EVT_CANCEL_TRANSACTION) {
1522 g_free(s->result);
1523 s->result = NULL;
1524 usb_mtp_data_free(s->data_in);
1525 s->data_in = NULL;
1526 if (s->write_pending) {
1527 g_free(s->dataset.filename);
1528 s->write_pending = false;
1529 s->dataset.size = 0;
1530 }
1531 usb_mtp_data_free(s->data_out);
1532 s->data_out = NULL;
1533 } else {
1534 p->status = USB_RET_STALL;
1535 }
1536 break;
1537 default:
1538 ret = usb_desc_handle_control(dev, p, request,
1539 value, index, length, data);
1540 if (ret >= 0) {
1541 return;
1542 }
1543 }
1544
1545 trace_usb_mtp_stall(dev->addr, "unknown control request");
1546 }
1547
1548 static void usb_mtp_cancel_packet(USBDevice *dev, USBPacket *p)
1549 {
1550 /* we don't use async packets, so this should never be called */
1551 fprintf(stderr, "%s\n", __func__);
1552 }
1553
1554 static char *utf16_to_str(uint8_t len, uint8_t *str16)
1555 {
1556 wchar_t *wstr = g_new0(wchar_t, len + 1);
1557 int count, dlen;
1558 char *dest;
1559
1560 for (count = 0; count < len; count++) {
1561 /* FIXME: not working for surrogate pairs */
1562 wstr[count] = lduw_le_p(str16 + (count * 2));
1563 }
1564 wstr[count] = 0;
1565
1566 dlen = wcstombs(NULL, wstr, 0) + 1;
1567 dest = g_malloc(dlen);
1568 wcstombs(dest, wstr, dlen);
1569 g_free(wstr);
1570 return dest;
1571 }
1572
1573 /* Wrapper around write, returns 0 on failure */
1574 static uint64_t write_retry(int fd, void *buf, uint64_t size, off_t offset)
1575 {
1576 uint64_t ret = 0;
1577
1578 if (lseek(fd, offset, SEEK_SET) < 0) {
1579 goto done;
1580 }
1581
1582 ret = qemu_write_full(fd, buf, size);
1583
1584 done:
1585 return ret;
1586 }
1587
1588 static int usb_mtp_update_object(MTPObject *parent, char *name)
1589 {
1590 int ret = 0;
1591
1592 MTPObject *o =
1593 usb_mtp_object_lookup_name(parent, name, strlen(name));
1594
1595 if (o) {
1596 ret = lstat(o->path, &o->stat);
1597 }
1598
1599 return ret;
1600 }
1601
1602 static int usb_mtp_write_data(MTPState *s)
1603 {
1604 MTPData *d = s->data_out;
1605 MTPObject *parent =
1606 usb_mtp_object_lookup(s, s->dataset.parent_handle);
1607 char *path = NULL;
1608 uint64_t rc;
1609 mode_t mask = 0644;
1610 int ret = 0;
1611
1612 assert(d != NULL);
1613
1614 switch (d->write_status) {
1615 case WRITE_START:
1616 if (!parent || !s->write_pending) {
1617 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, d->trans,
1618 0, 0, 0, 0);
1619 return 1;
1620 }
1621
1622 if (s->dataset.filename) {
1623 path = g_strdup_printf("%s/%s", parent->path, s->dataset.filename);
1624 if (s->dataset.format == FMT_ASSOCIATION) {
1625 ret = mkdir(path, mask);
1626 goto free;
1627 }
1628 d->fd = open(path, O_CREAT | O_WRONLY |
1629 O_CLOEXEC | O_NOFOLLOW, mask);
1630 if (d->fd == -1) {
1631 usb_mtp_queue_result(s, RES_STORE_FULL, d->trans,
1632 0, 0, 0, 0);
1633 goto done;
1634 }
1635
1636 /* Return success if initiator sent 0 sized data */
1637 if (!s->dataset.size) {
1638 goto success;
1639 }
1640 if (d->length != MTP_WRITE_BUF_SZ && !d->pending) {
1641 d->write_status = WRITE_END;
1642 }
1643 }
1644 /* fall through */
1645 case WRITE_CONTINUE:
1646 case WRITE_END:
1647 rc = write_retry(d->fd, d->data, d->data_offset,
1648 d->offset - d->data_offset);
1649 if (rc != d->data_offset) {
1650 usb_mtp_queue_result(s, RES_STORE_FULL, d->trans,
1651 0, 0, 0, 0);
1652 goto done;
1653 }
1654 if (d->write_status != WRITE_END) {
1655 g_free(path);
1656 return ret;
1657 } else {
1658 /*
1659 * Return an incomplete transfer if file size doesn't match
1660 * for < 4G file or if lstat fails which will result in an incorrect
1661 * file size
1662 */
1663 if ((s->dataset.size != 0xFFFFFFFF &&
1664 d->offset != s->dataset.size) ||
1665 usb_mtp_update_object(parent, s->dataset.filename)) {
1666 usb_mtp_queue_result(s, RES_INCOMPLETE_TRANSFER, d->trans,
1667 0, 0, 0, 0);
1668 goto done;
1669 }
1670 }
1671 }
1672
1673 success:
1674 usb_mtp_queue_result(s, RES_OK, d->trans,
1675 0, 0, 0, 0);
1676
1677 done:
1678 /*
1679 * The write dataset is kept around and freed only
1680 * on success or if another write request comes in
1681 */
1682 if (d->fd != -1) {
1683 close(d->fd);
1684 d->fd = -1;
1685 }
1686 free:
1687 g_free(s->dataset.filename);
1688 s->dataset.size = 0;
1689 g_free(path);
1690 s->write_pending = false;
1691 return ret;
1692 }
1693
1694 static void usb_mtp_write_metadata(MTPState *s, uint64_t dlen)
1695 {
1696 MTPData *d = s->data_out;
1697 ObjectInfo *dataset = (ObjectInfo *)d->data;
1698 char *filename;
1699 MTPObject *o;
1700 MTPObject *p = usb_mtp_object_lookup(s, s->dataset.parent_handle);
1701 uint32_t next_handle = s->next_handle;
1702 size_t filename_chars = dlen - offsetof(ObjectInfo, filename);
1703
1704 /*
1705 * filename is utf-16. We're intentionally doing
1706 * integer division to truncate if malicious guest
1707 * sent an odd number of bytes.
1708 */
1709 filename_chars /= 2;
1710
1711 assert(!s->write_pending);
1712 assert(p != NULL);
1713
1714 filename = utf16_to_str(MIN(dataset->length, filename_chars),
1715 dataset->filename);
1716
1717 if (strchr(filename, '/')) {
1718 usb_mtp_queue_result(s, RES_PARAMETER_NOT_SUPPORTED, d->trans,
1719 0, 0, 0, 0);
1720 g_free(filename);
1721 return;
1722 }
1723
1724 o = usb_mtp_object_lookup_name(p, filename, -1);
1725 if (o != NULL) {
1726 next_handle = o->handle;
1727 }
1728
1729 s->dataset.filename = filename;
1730 s->dataset.format = dataset->format;
1731 s->dataset.size = dataset->size;
1732 s->write_pending = true;
1733
1734 if (s->dataset.format == FMT_ASSOCIATION) {
1735 if (usb_mtp_write_data(s)) {
1736 /* next_handle will be allocated to the newly created dir */
1737 usb_mtp_queue_result(s, RES_STORE_FULL, d->trans,
1738 0, 0, 0, 0);
1739 return;
1740 }
1741 }
1742
1743 usb_mtp_queue_result(s, RES_OK, d->trans, 3, QEMU_STORAGE_ID,
1744 s->dataset.parent_handle, next_handle);
1745 }
1746
1747 static void usb_mtp_get_data(MTPState *s, mtp_container *container,
1748 USBPacket *p)
1749 {
1750 MTPData *d = s->data_out;
1751 uint64_t dlen;
1752 uint32_t data_len = p->iov.size;
1753 uint64_t total_len;
1754
1755 if (!d) {
1756 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, 0,
1757 0, 0, 0, 0);
1758 return;
1759 }
1760 if (d->first) {
1761 /* Total length of incoming data */
1762 total_len = cpu_to_le32(container->length) - sizeof(mtp_container);
1763 /* Length of data in this packet */
1764 data_len -= sizeof(mtp_container);
1765 if (total_len < MTP_WRITE_BUF_SZ) {
1766 usb_mtp_realloc(d, total_len);
1767 d->length += total_len;
1768 } else {
1769 usb_mtp_realloc(d, MTP_WRITE_BUF_SZ - sizeof(mtp_container));
1770 d->length += MTP_WRITE_BUF_SZ - sizeof(mtp_container);
1771 }
1772 d->offset = 0;
1773 d->first = false;
1774 d->pending = false;
1775 d->data_offset = 0;
1776 d->write_status = WRITE_START;
1777 }
1778
1779 if (d->pending) {
1780 memset(d->data, 0, d->length);
1781 if (d->length != MTP_WRITE_BUF_SZ) {
1782 usb_mtp_realloc(d, MTP_WRITE_BUF_SZ - d->length);
1783 d->length += (MTP_WRITE_BUF_SZ - d->length);
1784 }
1785 d->pending = false;
1786 d->write_status = WRITE_CONTINUE;
1787 d->data_offset = 0;
1788 }
1789
1790 if (d->length - d->data_offset > data_len) {
1791 dlen = data_len;
1792 } else {
1793 dlen = d->length - d->data_offset;
1794 }
1795
1796 switch (d->code) {
1797 case CMD_SEND_OBJECT_INFO:
1798 usb_packet_copy(p, d->data + d->data_offset, dlen);
1799 d->offset += dlen;
1800 d->data_offset += dlen;
1801 if (d->data_offset == d->length) {
1802 /* The operation might have already failed */
1803 if (!s->result) {
1804 usb_mtp_write_metadata(s, dlen);
1805 }
1806 usb_mtp_data_free(s->data_out);
1807 s->data_out = NULL;
1808 return;
1809 }
1810 break;
1811 case CMD_SEND_OBJECT:
1812 usb_packet_copy(p, d->data + d->data_offset, dlen);
1813 d->offset += dlen;
1814 d->data_offset += dlen;
1815 if ((p->iov.size % 64) || !p->iov.size) {
1816 assert((s->dataset.size == 0xFFFFFFFF) ||
1817 (s->dataset.size == d->offset));
1818
1819 if (d->length == MTP_WRITE_BUF_SZ) {
1820 d->write_status = WRITE_END;
1821 } else {
1822 d->write_status = WRITE_START;
1823 }
1824 usb_mtp_write_data(s);
1825 usb_mtp_data_free(s->data_out);
1826 s->data_out = NULL;
1827 return;
1828 }
1829 if (d->data_offset == d->length) {
1830 d->pending = true;
1831 usb_mtp_write_data(s);
1832 }
1833 break;
1834 default:
1835 p->status = USB_RET_STALL;
1836 return;
1837 }
1838 }
1839
1840 static void usb_mtp_handle_data(USBDevice *dev, USBPacket *p)
1841 {
1842 MTPState *s = USB_MTP(dev);
1843 MTPControl cmd;
1844 mtp_container container;
1845 uint32_t params[5];
1846 uint16_t container_type;
1847 int i, rc;
1848
1849 switch (p->ep->nr) {
1850 case EP_DATA_IN:
1851 if (s->data_out != NULL) {
1852 /* guest bug */
1853 trace_usb_mtp_stall(s->dev.addr, "awaiting data-out");
1854 p->status = USB_RET_STALL;
1855 return;
1856 }
1857 if (p->iov.size < sizeof(container)) {
1858 trace_usb_mtp_stall(s->dev.addr, "packet too small");
1859 p->status = USB_RET_STALL;
1860 return;
1861 }
1862 if (s->data_in != NULL) {
1863 MTPData *d = s->data_in;
1864 uint64_t dlen = d->length - d->offset;
1865 if (d->first) {
1866 trace_usb_mtp_data_in(s->dev.addr, d->trans, d->length);
1867 if (d->length + sizeof(container) > 0xFFFFFFFF) {
1868 container.length = cpu_to_le32(0xFFFFFFFF);
1869 } else {
1870 container.length =
1871 cpu_to_le32(d->length + sizeof(container));
1872 }
1873 container.type = cpu_to_le16(TYPE_DATA);
1874 container.code = cpu_to_le16(d->code);
1875 container.trans = cpu_to_le32(d->trans);
1876 usb_packet_copy(p, &container, sizeof(container));
1877 d->first = false;
1878 if (dlen > p->iov.size - sizeof(container)) {
1879 dlen = p->iov.size - sizeof(container);
1880 }
1881 } else {
1882 if (dlen > p->iov.size) {
1883 dlen = p->iov.size;
1884 }
1885 }
1886 if (d->fd == -1) {
1887 usb_packet_copy(p, d->data + d->offset, dlen);
1888 } else {
1889 if (d->alloc < p->iov.size) {
1890 d->alloc = p->iov.size;
1891 d->data = g_realloc(d->data, d->alloc);
1892 }
1893 rc = read(d->fd, d->data, dlen);
1894 if (rc != dlen) {
1895 memset(d->data, 0, dlen);
1896 s->result->code = RES_INCOMPLETE_TRANSFER;
1897 }
1898 usb_packet_copy(p, d->data, dlen);
1899 }
1900 d->offset += dlen;
1901 if (d->offset == d->length) {
1902 usb_mtp_data_free(s->data_in);
1903 s->data_in = NULL;
1904 }
1905 } else if (s->result != NULL) {
1906 MTPControl *r = s->result;
1907 int length = sizeof(container) + r->argc * sizeof(uint32_t);
1908 if (r->code == RES_OK) {
1909 trace_usb_mtp_success(s->dev.addr, r->trans,
1910 (r->argc > 0) ? r->argv[0] : 0,
1911 (r->argc > 1) ? r->argv[1] : 0);
1912 } else {
1913 trace_usb_mtp_error(s->dev.addr, r->code, r->trans,
1914 (r->argc > 0) ? r->argv[0] : 0,
1915 (r->argc > 1) ? r->argv[1] : 0);
1916 }
1917 container.length = cpu_to_le32(length);
1918 container.type = cpu_to_le16(TYPE_RESPONSE);
1919 container.code = cpu_to_le16(r->code);
1920 container.trans = cpu_to_le32(r->trans);
1921 for (i = 0; i < r->argc; i++) {
1922 params[i] = cpu_to_le32(r->argv[i]);
1923 }
1924 usb_packet_copy(p, &container, sizeof(container));
1925 usb_packet_copy(p, &params, length - sizeof(container));
1926 g_free(s->result);
1927 s->result = NULL;
1928 }
1929 break;
1930 case EP_DATA_OUT:
1931 if (p->iov.size < sizeof(container)) {
1932 trace_usb_mtp_stall(s->dev.addr, "packet too small");
1933 p->status = USB_RET_STALL;
1934 return;
1935 }
1936 if ((s->data_out != NULL) && !s->data_out->first) {
1937 container_type = TYPE_DATA;
1938 } else {
1939 usb_packet_copy(p, &container, sizeof(container));
1940 container_type = le16_to_cpu(container.type);
1941 }
1942 switch (container_type) {
1943 case TYPE_COMMAND:
1944 if (s->data_in || s->data_out || s->result) {
1945 trace_usb_mtp_stall(s->dev.addr, "transaction inflight");
1946 p->status = USB_RET_STALL;
1947 return;
1948 }
1949 cmd.code = le16_to_cpu(container.code);
1950 cmd.argc = (le32_to_cpu(container.length) - sizeof(container))
1951 / sizeof(uint32_t);
1952 cmd.trans = le32_to_cpu(container.trans);
1953 if (cmd.argc > ARRAY_SIZE(cmd.argv)) {
1954 cmd.argc = ARRAY_SIZE(cmd.argv);
1955 }
1956 if (p->iov.size < sizeof(container) + cmd.argc * sizeof(uint32_t)) {
1957 trace_usb_mtp_stall(s->dev.addr, "packet too small");
1958 p->status = USB_RET_STALL;
1959 return;
1960 }
1961 usb_packet_copy(p, &params, cmd.argc * sizeof(uint32_t));
1962 for (i = 0; i < cmd.argc; i++) {
1963 cmd.argv[i] = le32_to_cpu(params[i]);
1964 }
1965 trace_usb_mtp_command(s->dev.addr, cmd.code, cmd.trans,
1966 (cmd.argc > 0) ? cmd.argv[0] : 0,
1967 (cmd.argc > 1) ? cmd.argv[1] : 0,
1968 (cmd.argc > 2) ? cmd.argv[2] : 0,
1969 (cmd.argc > 3) ? cmd.argv[3] : 0,
1970 (cmd.argc > 4) ? cmd.argv[4] : 0);
1971 usb_mtp_command(s, &cmd);
1972 break;
1973 case TYPE_DATA:
1974 /* One of the previous transfers has already errored but the
1975 * responder is still sending data associated with it
1976 */
1977 if (s->result != NULL) {
1978 return;
1979 }
1980 usb_mtp_get_data(s, &container, p);
1981 break;
1982 default:
1983 /* not needed as long as the mtp device is read-only */
1984 p->status = USB_RET_STALL;
1985 return;
1986 }
1987 break;
1988 case EP_EVENT:
1989 if (!QTAILQ_EMPTY(&s->events)) {
1990 struct MTPMonEntry *e = QTAILQ_LAST(&s->events);
1991 uint32_t handle;
1992 int len = sizeof(container) + sizeof(uint32_t);
1993
1994 if (p->iov.size < len) {
1995 trace_usb_mtp_stall(s->dev.addr,
1996 "packet too small to send event");
1997 p->status = USB_RET_STALL;
1998 return;
1999 }
2000
2001 QTAILQ_REMOVE(&s->events, e, next);
2002 container.length = cpu_to_le32(len);
2003 container.type = cpu_to_le32(TYPE_EVENT);
2004 container.code = cpu_to_le16(e->event);
2005 container.trans = 0; /* no trans specific events */
2006 handle = cpu_to_le32(e->handle);
2007 usb_packet_copy(p, &container, sizeof(container));
2008 usb_packet_copy(p, &handle, sizeof(uint32_t));
2009 g_free(e);
2010 return;
2011 }
2012 p->status = USB_RET_NAK;
2013 return;
2014 default:
2015 trace_usb_mtp_stall(s->dev.addr, "invalid endpoint");
2016 p->status = USB_RET_STALL;
2017 return;
2018 }
2019
2020 if (p->actual_length == 0) {
2021 trace_usb_mtp_nak(s->dev.addr, p->ep->nr);
2022 p->status = USB_RET_NAK;
2023 return;
2024 } else {
2025 trace_usb_mtp_xfer(s->dev.addr, p->ep->nr, p->actual_length,
2026 p->iov.size);
2027 return;
2028 }
2029 }
2030
2031 static void usb_mtp_realize(USBDevice *dev, Error **errp)
2032 {
2033 MTPState *s = USB_MTP(dev);
2034
2035 usb_desc_create_serial(dev);
2036 usb_desc_init(dev);
2037 QTAILQ_INIT(&s->objects);
2038 if (s->desc == NULL) {
2039 if (s->root == NULL) {
2040 error_setg(errp, "usb-mtp: rootdir property must be configured");
2041 return;
2042 }
2043 s->desc = strrchr(s->root, '/');
2044 if (s->desc && s->desc[0]) {
2045 s->desc = g_strdup(s->desc + 1);
2046 } else {
2047 s->desc = g_strdup("none");
2048 }
2049 }
2050 /* Mark store as RW */
2051 if (!s->readonly) {
2052 s->flags |= (1 << MTP_FLAG_WRITABLE);
2053 }
2054
2055 }
2056
2057 static const VMStateDescription vmstate_usb_mtp = {
2058 .name = "usb-mtp",
2059 .unmigratable = 1,
2060 .version_id = 1,
2061 .minimum_version_id = 1,
2062 .fields = (VMStateField[]) {
2063 VMSTATE_USB_DEVICE(dev, MTPState),
2064 VMSTATE_END_OF_LIST()
2065 }
2066 };
2067
2068 static Property mtp_properties[] = {
2069 DEFINE_PROP_STRING("rootdir", MTPState, root),
2070 DEFINE_PROP_STRING("desc", MTPState, desc),
2071 DEFINE_PROP_BOOL("readonly", MTPState, readonly, true),
2072 DEFINE_PROP_END_OF_LIST(),
2073 };
2074
2075 static void usb_mtp_class_initfn(ObjectClass *klass, void *data)
2076 {
2077 DeviceClass *dc = DEVICE_CLASS(klass);
2078 USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
2079
2080 uc->realize = usb_mtp_realize;
2081 uc->product_desc = "QEMU USB MTP";
2082 uc->usb_desc = &desc;
2083 uc->cancel_packet = usb_mtp_cancel_packet;
2084 uc->handle_attach = usb_desc_attach;
2085 uc->handle_reset = usb_mtp_handle_reset;
2086 uc->handle_control = usb_mtp_handle_control;
2087 uc->handle_data = usb_mtp_handle_data;
2088 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
2089 dc->desc = "USB Media Transfer Protocol device";
2090 dc->fw_name = "mtp";
2091 dc->vmsd = &vmstate_usb_mtp;
2092 dc->props = mtp_properties;
2093 }
2094
2095 static TypeInfo mtp_info = {
2096 .name = TYPE_USB_MTP,
2097 .parent = TYPE_USB_DEVICE,
2098 .instance_size = sizeof(MTPState),
2099 .class_init = usb_mtp_class_initfn,
2100 };
2101
2102 static void usb_mtp_register_types(void)
2103 {
2104 type_register_static(&mtp_info);
2105 }
2106
2107 type_init(usb_mtp_register_types)