Update version for v3.1.0-rc3 release
[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 <wchar.h>
15 #include <dirent.h>
16
17 #include <sys/statvfs.h>
18 #ifdef CONFIG_INOTIFY1
19 #include <sys/inotify.h>
20 #include "qemu/main-loop.h"
21 #endif
22
23 #include "qemu-common.h"
24 #include "qemu/iov.h"
25 #include "trace.h"
26 #include "hw/usb.h"
27 #include "desc.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 enum mtp_code {
39 /* command codes */
40 CMD_GET_DEVICE_INFO = 0x1001,
41 CMD_OPEN_SESSION = 0x1002,
42 CMD_CLOSE_SESSION = 0x1003,
43 CMD_GET_STORAGE_IDS = 0x1004,
44 CMD_GET_STORAGE_INFO = 0x1005,
45 CMD_GET_NUM_OBJECTS = 0x1006,
46 CMD_GET_OBJECT_HANDLES = 0x1007,
47 CMD_GET_OBJECT_INFO = 0x1008,
48 CMD_GET_OBJECT = 0x1009,
49 CMD_DELETE_OBJECT = 0x100b,
50 CMD_SEND_OBJECT_INFO = 0x100c,
51 CMD_SEND_OBJECT = 0x100d,
52 CMD_GET_PARTIAL_OBJECT = 0x101b,
53 CMD_GET_OBJECT_PROPS_SUPPORTED = 0x9801,
54 CMD_GET_OBJECT_PROP_DESC = 0x9802,
55 CMD_GET_OBJECT_PROP_VALUE = 0x9803,
56
57 /* response codes */
58 RES_OK = 0x2001,
59 RES_GENERAL_ERROR = 0x2002,
60 RES_SESSION_NOT_OPEN = 0x2003,
61 RES_INVALID_TRANSACTION_ID = 0x2004,
62 RES_OPERATION_NOT_SUPPORTED = 0x2005,
63 RES_PARAMETER_NOT_SUPPORTED = 0x2006,
64 RES_INCOMPLETE_TRANSFER = 0x2007,
65 RES_INVALID_STORAGE_ID = 0x2008,
66 RES_INVALID_OBJECT_HANDLE = 0x2009,
67 RES_INVALID_OBJECT_FORMAT_CODE = 0x200b,
68 RES_STORE_FULL = 0x200c,
69 RES_STORE_READ_ONLY = 0x200e,
70 RES_PARTIAL_DELETE = 0x2012,
71 RES_STORE_NOT_AVAILABLE = 0x2013,
72 RES_SPEC_BY_FORMAT_UNSUPPORTED = 0x2014,
73 RES_INVALID_OBJECTINFO = 0x2015,
74 RES_DESTINATION_UNSUPPORTED = 0x2020,
75 RES_INVALID_PARENT_OBJECT = 0x201a,
76 RES_INVALID_PARAMETER = 0x201d,
77 RES_SESSION_ALREADY_OPEN = 0x201e,
78 RES_INVALID_OBJECT_PROP_CODE = 0xA801,
79
80 /* format codes */
81 FMT_UNDEFINED_OBJECT = 0x3000,
82 FMT_ASSOCIATION = 0x3001,
83
84 /* event codes */
85 EVT_CANCEL_TRANSACTION = 0x4001,
86 EVT_OBJ_ADDED = 0x4002,
87 EVT_OBJ_REMOVED = 0x4003,
88 EVT_OBJ_INFO_CHANGED = 0x4007,
89
90 /* object properties */
91 PROP_STORAGE_ID = 0xDC01,
92 PROP_OBJECT_FORMAT = 0xDC02,
93 PROP_OBJECT_COMPRESSED_SIZE = 0xDC04,
94 PROP_PARENT_OBJECT = 0xDC0B,
95 PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER = 0xDC41,
96 PROP_NAME = 0xDC44,
97 };
98
99 enum mtp_data_type {
100 DATA_TYPE_UINT16 = 0x0004,
101 DATA_TYPE_UINT32 = 0x0006,
102 DATA_TYPE_UINT64 = 0x0008,
103 DATA_TYPE_UINT128 = 0x000a,
104 DATA_TYPE_STRING = 0xffff,
105 };
106
107 typedef struct {
108 uint32_t length;
109 uint16_t type;
110 uint16_t code;
111 uint32_t trans;
112 } QEMU_PACKED mtp_container;
113
114 /* ----------------------------------------------------------------------- */
115
116 typedef struct MTPState MTPState;
117 typedef struct MTPControl MTPControl;
118 typedef struct MTPData MTPData;
119 typedef struct MTPObject MTPObject;
120
121 enum {
122 EP_DATA_IN = 1,
123 EP_DATA_OUT,
124 EP_EVENT,
125 };
126
127 #ifdef CONFIG_INOTIFY1
128 typedef struct MTPMonEntry MTPMonEntry;
129
130 struct MTPMonEntry {
131 uint32_t event;
132 uint32_t handle;
133
134 QTAILQ_ENTRY(MTPMonEntry) next;
135 };
136 #endif
137
138 struct MTPControl {
139 uint16_t code;
140 uint32_t trans;
141 int argc;
142 uint32_t argv[5];
143 };
144
145 struct MTPData {
146 uint16_t code;
147 uint32_t trans;
148 uint64_t offset;
149 uint64_t length;
150 uint64_t alloc;
151 uint8_t *data;
152 bool first;
153 /* Used for >4G file sizes */
154 bool pending;
155 uint64_t cached_length;
156 int fd;
157 };
158
159 struct MTPObject {
160 uint32_t handle;
161 uint16_t format;
162 char *name;
163 char *path;
164 struct stat stat;
165 #ifdef CONFIG_INOTIFY1
166 /* inotify watch cookie */
167 int watchfd;
168 #endif
169 MTPObject *parent;
170 uint32_t nchildren;
171 QLIST_HEAD(, MTPObject) children;
172 QLIST_ENTRY(MTPObject) list;
173 bool have_children;
174 QTAILQ_ENTRY(MTPObject) next;
175 };
176
177 struct MTPState {
178 USBDevice dev;
179 char *root;
180 char *desc;
181 uint32_t flags;
182
183 MTPData *data_in;
184 MTPData *data_out;
185 MTPControl *result;
186 uint32_t session;
187 uint32_t next_handle;
188 bool readonly;
189
190 QTAILQ_HEAD(, MTPObject) objects;
191 #ifdef CONFIG_INOTIFY1
192 /* inotify descriptor */
193 int inotifyfd;
194 QTAILQ_HEAD(events, MTPMonEntry) events;
195 #endif
196 /* Responder is expecting a write operation */
197 bool write_pending;
198 struct {
199 uint32_t parent_handle;
200 uint16_t format;
201 uint32_t size;
202 char *filename;
203 } dataset;
204 };
205
206 /*
207 * ObjectInfo dataset received from initiator
208 * Fields we don't care about are ignored
209 */
210 typedef struct {
211 uint32_t storage_id; /*unused*/
212 uint16_t format;
213 uint16_t protection_status; /*unused*/
214 uint32_t size;
215 uint16_t thumb_format; /*unused*/
216 uint32_t thumb_comp_sz; /*unused*/
217 uint32_t thumb_pix_width; /*unused*/
218 uint32_t thumb_pix_height; /*unused*/
219 uint32_t image_pix_width; /*unused*/
220 uint32_t image_pix_height; /*unused*/
221 uint32_t image_bit_depth; /*unused*/
222 uint32_t parent; /*unused*/
223 uint16_t assoc_type;
224 uint32_t assoc_desc;
225 uint32_t seq_no; /*unused*/
226 uint8_t length; /*part of filename field*/
227 uint16_t filename[0];
228 char date_created[0]; /*unused*/
229 char date_modified[0]; /*unused*/
230 char keywords[0]; /*unused*/
231 /* string and other data follows */
232 } QEMU_PACKED ObjectInfo;
233
234 #define TYPE_USB_MTP "usb-mtp"
235 #define USB_MTP(obj) OBJECT_CHECK(MTPState, (obj), TYPE_USB_MTP)
236
237 #define QEMU_STORAGE_ID 0x00010001
238
239 #define MTP_FLAG_WRITABLE 0
240
241 #define FLAG_SET(_mtp, _flag) ((_mtp)->flags & (1 << (_flag)))
242
243 /* ----------------------------------------------------------------------- */
244
245 #define MTP_MANUFACTURER "QEMU"
246 #define MTP_PRODUCT "QEMU filesharing"
247
248 enum {
249 STR_MANUFACTURER = 1,
250 STR_PRODUCT,
251 STR_SERIALNUMBER,
252 STR_MTP,
253 STR_CONFIG_FULL,
254 STR_CONFIG_HIGH,
255 STR_CONFIG_SUPER,
256 };
257
258 static const USBDescStrings desc_strings = {
259 [STR_MANUFACTURER] = MTP_MANUFACTURER,
260 [STR_PRODUCT] = MTP_PRODUCT,
261 [STR_SERIALNUMBER] = "34617",
262 [STR_MTP] = "MTP",
263 [STR_CONFIG_FULL] = "Full speed config (usb 1.1)",
264 [STR_CONFIG_HIGH] = "High speed config (usb 2.0)",
265 [STR_CONFIG_SUPER] = "Super speed config (usb 3.0)",
266 };
267
268 static const USBDescIface desc_iface_full = {
269 .bInterfaceNumber = 0,
270 .bNumEndpoints = 3,
271 .bInterfaceClass = USB_CLASS_STILL_IMAGE,
272 .bInterfaceSubClass = 0x01,
273 .bInterfaceProtocol = 0x01,
274 .iInterface = STR_MTP,
275 .eps = (USBDescEndpoint[]) {
276 {
277 .bEndpointAddress = USB_DIR_IN | EP_DATA_IN,
278 .bmAttributes = USB_ENDPOINT_XFER_BULK,
279 .wMaxPacketSize = 64,
280 },{
281 .bEndpointAddress = USB_DIR_OUT | EP_DATA_OUT,
282 .bmAttributes = USB_ENDPOINT_XFER_BULK,
283 .wMaxPacketSize = 64,
284 },{
285 .bEndpointAddress = USB_DIR_IN | EP_EVENT,
286 .bmAttributes = USB_ENDPOINT_XFER_INT,
287 .wMaxPacketSize = 64,
288 .bInterval = 0x0a,
289 },
290 }
291 };
292
293 static const USBDescDevice desc_device_full = {
294 .bcdUSB = 0x0200,
295 .bMaxPacketSize0 = 8,
296 .bNumConfigurations = 1,
297 .confs = (USBDescConfig[]) {
298 {
299 .bNumInterfaces = 1,
300 .bConfigurationValue = 1,
301 .iConfiguration = STR_CONFIG_FULL,
302 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP,
303 .bMaxPower = 2,
304 .nif = 1,
305 .ifs = &desc_iface_full,
306 },
307 },
308 };
309
310 static const USBDescIface desc_iface_high = {
311 .bInterfaceNumber = 0,
312 .bNumEndpoints = 3,
313 .bInterfaceClass = USB_CLASS_STILL_IMAGE,
314 .bInterfaceSubClass = 0x01,
315 .bInterfaceProtocol = 0x01,
316 .iInterface = STR_MTP,
317 .eps = (USBDescEndpoint[]) {
318 {
319 .bEndpointAddress = USB_DIR_IN | EP_DATA_IN,
320 .bmAttributes = USB_ENDPOINT_XFER_BULK,
321 .wMaxPacketSize = 512,
322 },{
323 .bEndpointAddress = USB_DIR_OUT | EP_DATA_OUT,
324 .bmAttributes = USB_ENDPOINT_XFER_BULK,
325 .wMaxPacketSize = 512,
326 },{
327 .bEndpointAddress = USB_DIR_IN | EP_EVENT,
328 .bmAttributes = USB_ENDPOINT_XFER_INT,
329 .wMaxPacketSize = 64,
330 .bInterval = 0x0a,
331 },
332 }
333 };
334
335 static const USBDescDevice desc_device_high = {
336 .bcdUSB = 0x0200,
337 .bMaxPacketSize0 = 64,
338 .bNumConfigurations = 1,
339 .confs = (USBDescConfig[]) {
340 {
341 .bNumInterfaces = 1,
342 .bConfigurationValue = 1,
343 .iConfiguration = STR_CONFIG_HIGH,
344 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP,
345 .bMaxPower = 2,
346 .nif = 1,
347 .ifs = &desc_iface_high,
348 },
349 },
350 };
351
352 static const USBDescMSOS desc_msos = {
353 .CompatibleID = "MTP",
354 .SelectiveSuspendEnabled = true,
355 };
356
357 static const USBDesc desc = {
358 .id = {
359 .idVendor = 0x46f4, /* CRC16() of "QEMU" */
360 .idProduct = 0x0004,
361 .bcdDevice = 0,
362 .iManufacturer = STR_MANUFACTURER,
363 .iProduct = STR_PRODUCT,
364 .iSerialNumber = STR_SERIALNUMBER,
365 },
366 .full = &desc_device_full,
367 .high = &desc_device_high,
368 .str = desc_strings,
369 .msos = &desc_msos,
370 };
371
372 /* ----------------------------------------------------------------------- */
373
374 static MTPObject *usb_mtp_object_alloc(MTPState *s, uint32_t handle,
375 MTPObject *parent, char *name)
376 {
377 MTPObject *o = g_new0(MTPObject, 1);
378
379 if (name[0] == '.') {
380 goto ignore;
381 }
382
383 o->handle = handle;
384 o->parent = parent;
385 o->name = g_strdup(name);
386 if (parent == NULL) {
387 o->path = g_strdup(name);
388 } else {
389 o->path = g_strdup_printf("%s/%s", parent->path, name);
390 }
391
392 if (lstat(o->path, &o->stat) != 0) {
393 goto ignore;
394 }
395 if (S_ISREG(o->stat.st_mode)) {
396 o->format = FMT_UNDEFINED_OBJECT;
397 } else if (S_ISDIR(o->stat.st_mode)) {
398 o->format = FMT_ASSOCIATION;
399 } else {
400 goto ignore;
401 }
402
403 if (access(o->path, R_OK) != 0) {
404 goto ignore;
405 }
406
407 trace_usb_mtp_object_alloc(s->dev.addr, o->handle, o->path);
408
409 QTAILQ_INSERT_TAIL(&s->objects, o, next);
410 return o;
411
412 ignore:
413 g_free(o->name);
414 g_free(o->path);
415 g_free(o);
416 return NULL;
417 }
418
419 static void usb_mtp_object_free(MTPState *s, MTPObject *o)
420 {
421 MTPObject *iter;
422
423 if (!o) {
424 return;
425 }
426
427 trace_usb_mtp_object_free(s->dev.addr, o->handle, o->path);
428
429 QTAILQ_REMOVE(&s->objects, o, next);
430 if (o->parent) {
431 QLIST_REMOVE(o, list);
432 o->parent->nchildren--;
433 }
434
435 while (!QLIST_EMPTY(&o->children)) {
436 iter = QLIST_FIRST(&o->children);
437 usb_mtp_object_free(s, iter);
438 }
439 g_free(o->name);
440 g_free(o->path);
441 g_free(o);
442 }
443
444 static MTPObject *usb_mtp_object_lookup(MTPState *s, uint32_t handle)
445 {
446 MTPObject *o;
447
448 QTAILQ_FOREACH(o, &s->objects, next) {
449 if (o->handle == handle) {
450 return o;
451 }
452 }
453 return NULL;
454 }
455
456 static MTPObject *usb_mtp_add_child(MTPState *s, MTPObject *o,
457 char *name)
458 {
459 MTPObject *child =
460 usb_mtp_object_alloc(s, s->next_handle++, o, name);
461
462 if (child) {
463 trace_usb_mtp_add_child(s->dev.addr, child->handle, child->path);
464 QLIST_INSERT_HEAD(&o->children, child, list);
465 o->nchildren++;
466
467 if (child->format == FMT_ASSOCIATION) {
468 QLIST_INIT(&child->children);
469 }
470 }
471
472 return child;
473 }
474
475 static MTPObject *usb_mtp_object_lookup_name(MTPObject *parent,
476 char *name, int len)
477 {
478 MTPObject *iter;
479
480 QLIST_FOREACH(iter, &parent->children, list) {
481 if (strncmp(iter->name, name, len) == 0) {
482 return iter;
483 }
484 }
485
486 return NULL;
487 }
488
489 #ifdef CONFIG_INOTIFY1
490 static MTPObject *usb_mtp_object_lookup_wd(MTPState *s, int wd)
491 {
492 MTPObject *iter;
493
494 QTAILQ_FOREACH(iter, &s->objects, next) {
495 if (iter->watchfd == wd) {
496 return iter;
497 }
498 }
499
500 return NULL;
501 }
502
503 static void inotify_watchfn(void *arg)
504 {
505 MTPState *s = arg;
506 ssize_t bytes;
507 /* From the man page: atleast one event can be read */
508 int pos;
509 char buf[sizeof(struct inotify_event) + NAME_MAX + 1];
510
511 for (;;) {
512 bytes = read(s->inotifyfd, buf, sizeof(buf));
513 pos = 0;
514
515 if (bytes <= 0) {
516 /* Better luck next time */
517 return;
518 }
519
520 /*
521 * TODO: Ignore initiator initiated events.
522 * For now we are good because the store is RO
523 */
524 while (bytes > 0) {
525 char *p = buf + pos;
526 struct inotify_event *event = (struct inotify_event *)p;
527 int watchfd = 0;
528 uint32_t mask = event->mask & (IN_CREATE | IN_DELETE |
529 IN_MODIFY | IN_IGNORED);
530 MTPObject *parent = usb_mtp_object_lookup_wd(s, event->wd);
531 MTPMonEntry *entry = NULL;
532 MTPObject *o;
533
534 pos = pos + sizeof(struct inotify_event) + event->len;
535 bytes = bytes - pos;
536
537 if (!parent) {
538 continue;
539 }
540
541 switch (mask) {
542 case IN_CREATE:
543 if (usb_mtp_object_lookup_name
544 (parent, event->name, event->len)) {
545 /* Duplicate create event */
546 continue;
547 }
548 entry = g_new0(MTPMonEntry, 1);
549 entry->handle = s->next_handle;
550 entry->event = EVT_OBJ_ADDED;
551 o = usb_mtp_add_child(s, parent, event->name);
552 if (!o) {
553 g_free(entry);
554 continue;
555 }
556 o->watchfd = watchfd;
557 trace_usb_mtp_inotify_event(s->dev.addr, event->name,
558 event->mask, "Obj Added");
559 break;
560
561 case IN_DELETE:
562 /*
563 * The kernel issues a IN_IGNORED event
564 * when a dir containing a watchpoint is
565 * deleted, so we don't have to delete the
566 * watchpoint
567 */
568 o = usb_mtp_object_lookup_name(parent, event->name, event->len);
569 if (!o) {
570 continue;
571 }
572 entry = g_new0(MTPMonEntry, 1);
573 entry->handle = o->handle;
574 entry->event = EVT_OBJ_REMOVED;
575 trace_usb_mtp_inotify_event(s->dev.addr, o->path,
576 event->mask, "Obj Deleted");
577 usb_mtp_object_free(s, o);
578 break;
579
580 case IN_MODIFY:
581 o = usb_mtp_object_lookup_name(parent, event->name, event->len);
582 if (!o) {
583 continue;
584 }
585 entry = g_new0(MTPMonEntry, 1);
586 entry->handle = o->handle;
587 entry->event = EVT_OBJ_INFO_CHANGED;
588 trace_usb_mtp_inotify_event(s->dev.addr, o->path,
589 event->mask, "Obj Modified");
590 break;
591
592 case IN_IGNORED:
593 trace_usb_mtp_inotify_event(s->dev.addr, parent->path,
594 event->mask, "Obj parent dir ignored");
595 break;
596
597 default:
598 fprintf(stderr, "usb-mtp: failed to parse inotify event\n");
599 continue;
600 }
601
602 if (entry) {
603 QTAILQ_INSERT_HEAD(&s->events, entry, next);
604 }
605 }
606 }
607 }
608
609 static int usb_mtp_inotify_init(MTPState *s)
610 {
611 int fd;
612
613 fd = inotify_init1(IN_NONBLOCK);
614 if (fd == -1) {
615 return 1;
616 }
617
618 QTAILQ_INIT(&s->events);
619 s->inotifyfd = fd;
620
621 qemu_set_fd_handler(fd, inotify_watchfn, NULL, s);
622
623 return 0;
624 }
625
626 static void usb_mtp_inotify_cleanup(MTPState *s)
627 {
628 MTPMonEntry *e, *p;
629
630 if (!s->inotifyfd) {
631 return;
632 }
633
634 qemu_set_fd_handler(s->inotifyfd, NULL, NULL, s);
635 close(s->inotifyfd);
636
637 QTAILQ_FOREACH_SAFE(e, &s->events, next, p) {
638 QTAILQ_REMOVE(&s->events, e, next);
639 g_free(e);
640 }
641 }
642
643 static int usb_mtp_add_watch(int inotifyfd, char *path)
644 {
645 uint32_t mask = IN_CREATE | IN_DELETE | IN_MODIFY |
646 IN_ISDIR;
647
648 return inotify_add_watch(inotifyfd, path, mask);
649 }
650 #endif
651
652 static void usb_mtp_object_readdir(MTPState *s, MTPObject *o)
653 {
654 struct dirent *entry;
655 DIR *dir;
656
657 if (o->have_children) {
658 return;
659 }
660 o->have_children = true;
661
662 dir = opendir(o->path);
663 if (!dir) {
664 return;
665 }
666 #ifdef CONFIG_INOTIFY1
667 int watchfd = usb_mtp_add_watch(s->inotifyfd, o->path);
668 if (watchfd == -1) {
669 fprintf(stderr, "usb-mtp: failed to add watch for %s\n", o->path);
670 } else {
671 trace_usb_mtp_inotify_event(s->dev.addr, o->path,
672 0, "Watch Added");
673 o->watchfd = watchfd;
674 }
675 #endif
676 while ((entry = readdir(dir)) != NULL) {
677 usb_mtp_add_child(s, o, entry->d_name);
678 }
679 closedir(dir);
680 }
681
682 /* ----------------------------------------------------------------------- */
683
684 static MTPData *usb_mtp_data_alloc(MTPControl *c)
685 {
686 MTPData *data = g_new0(MTPData, 1);
687
688 data->code = c->code;
689 data->trans = c->trans;
690 data->fd = -1;
691 data->first = true;
692 return data;
693 }
694
695 static void usb_mtp_data_free(MTPData *data)
696 {
697 if (data == NULL) {
698 return;
699 }
700 if (data->fd != -1) {
701 close(data->fd);
702 }
703 g_free(data->data);
704 g_free(data);
705 }
706
707 static void usb_mtp_realloc(MTPData *data, uint32_t bytes)
708 {
709 if (data->length + bytes <= data->alloc) {
710 return;
711 }
712 data->alloc = (data->length + bytes + 0xff) & ~0xff;
713 data->data = g_realloc(data->data, data->alloc);
714 }
715
716 static void usb_mtp_add_u8(MTPData *data, uint8_t val)
717 {
718 usb_mtp_realloc(data, 1);
719 data->data[data->length++] = val;
720 }
721
722 static void usb_mtp_add_u16(MTPData *data, uint16_t val)
723 {
724 usb_mtp_realloc(data, 2);
725 data->data[data->length++] = (val >> 0) & 0xff;
726 data->data[data->length++] = (val >> 8) & 0xff;
727 }
728
729 static void usb_mtp_add_u32(MTPData *data, uint32_t val)
730 {
731 usb_mtp_realloc(data, 4);
732 data->data[data->length++] = (val >> 0) & 0xff;
733 data->data[data->length++] = (val >> 8) & 0xff;
734 data->data[data->length++] = (val >> 16) & 0xff;
735 data->data[data->length++] = (val >> 24) & 0xff;
736 }
737
738 static void usb_mtp_add_u64(MTPData *data, uint64_t val)
739 {
740 usb_mtp_realloc(data, 8);
741 data->data[data->length++] = (val >> 0) & 0xff;
742 data->data[data->length++] = (val >> 8) & 0xff;
743 data->data[data->length++] = (val >> 16) & 0xff;
744 data->data[data->length++] = (val >> 24) & 0xff;
745 data->data[data->length++] = (val >> 32) & 0xff;
746 data->data[data->length++] = (val >> 40) & 0xff;
747 data->data[data->length++] = (val >> 48) & 0xff;
748 data->data[data->length++] = (val >> 56) & 0xff;
749 }
750
751 static void usb_mtp_add_u16_array(MTPData *data, uint32_t len,
752 const uint16_t *vals)
753 {
754 int i;
755
756 usb_mtp_add_u32(data, len);
757 for (i = 0; i < len; i++) {
758 usb_mtp_add_u16(data, vals[i]);
759 }
760 }
761
762 static void usb_mtp_add_u32_array(MTPData *data, uint32_t len,
763 const uint32_t *vals)
764 {
765 int i;
766
767 usb_mtp_add_u32(data, len);
768 for (i = 0; i < len; i++) {
769 usb_mtp_add_u32(data, vals[i]);
770 }
771 }
772
773 static void usb_mtp_add_wstr(MTPData *data, const wchar_t *str)
774 {
775 uint32_t len = wcslen(str);
776 int i;
777
778 if (len > 0) {
779 len++; /* include terminating L'\0' */
780 }
781
782 usb_mtp_add_u8(data, len);
783 for (i = 0; i < len; i++) {
784 usb_mtp_add_u16(data, str[i]);
785 }
786 }
787
788 static void usb_mtp_add_str(MTPData *data, const char *str)
789 {
790 uint32_t len = strlen(str)+1;
791 wchar_t *wstr = g_new(wchar_t, len);
792 size_t ret;
793
794 ret = mbstowcs(wstr, str, len);
795 if (ret == -1) {
796 usb_mtp_add_wstr(data, L"Oops");
797 } else {
798 usb_mtp_add_wstr(data, wstr);
799 }
800
801 g_free(wstr);
802 }
803
804 static void usb_mtp_add_time(MTPData *data, time_t time)
805 {
806 char buf[16];
807 struct tm tm;
808
809 gmtime_r(&time, &tm);
810 strftime(buf, sizeof(buf), "%Y%m%dT%H%M%S", &tm);
811 usb_mtp_add_str(data, buf);
812 }
813
814 /* ----------------------------------------------------------------------- */
815
816 static void usb_mtp_queue_result(MTPState *s, uint16_t code, uint32_t trans,
817 int argc, uint32_t arg0, uint32_t arg1,
818 uint32_t arg2)
819 {
820 MTPControl *c = g_new0(MTPControl, 1);
821
822 c->code = code;
823 c->trans = trans;
824 c->argc = argc;
825 if (argc > 0) {
826 c->argv[0] = arg0;
827 }
828 if (argc > 1) {
829 c->argv[1] = arg1;
830 }
831 if (argc > 2) {
832 c->argv[2] = arg2;
833 }
834
835 assert(s->result == NULL);
836 s->result = c;
837 }
838
839 /* ----------------------------------------------------------------------- */
840
841 static MTPData *usb_mtp_get_device_info(MTPState *s, MTPControl *c)
842 {
843 static const uint16_t ops[] = {
844 CMD_GET_DEVICE_INFO,
845 CMD_OPEN_SESSION,
846 CMD_CLOSE_SESSION,
847 CMD_GET_STORAGE_IDS,
848 CMD_GET_STORAGE_INFO,
849 CMD_GET_NUM_OBJECTS,
850 CMD_GET_OBJECT_HANDLES,
851 CMD_GET_OBJECT_INFO,
852 CMD_DELETE_OBJECT,
853 CMD_SEND_OBJECT_INFO,
854 CMD_SEND_OBJECT,
855 CMD_GET_OBJECT,
856 CMD_GET_PARTIAL_OBJECT,
857 CMD_GET_OBJECT_PROPS_SUPPORTED,
858 CMD_GET_OBJECT_PROP_DESC,
859 CMD_GET_OBJECT_PROP_VALUE,
860 };
861 static const uint16_t fmt[] = {
862 FMT_UNDEFINED_OBJECT,
863 FMT_ASSOCIATION,
864 };
865 MTPData *d = usb_mtp_data_alloc(c);
866
867 trace_usb_mtp_op_get_device_info(s->dev.addr);
868
869 usb_mtp_add_u16(d, 100);
870 usb_mtp_add_u32(d, 0x00000006);
871 usb_mtp_add_u16(d, 0x0064);
872 usb_mtp_add_wstr(d, L"");
873 usb_mtp_add_u16(d, 0x0000);
874
875 usb_mtp_add_u16_array(d, ARRAY_SIZE(ops), ops);
876 usb_mtp_add_u16_array(d, 0, NULL);
877 usb_mtp_add_u16_array(d, 0, NULL);
878 usb_mtp_add_u16_array(d, 0, NULL);
879 usb_mtp_add_u16_array(d, ARRAY_SIZE(fmt), fmt);
880
881 usb_mtp_add_wstr(d, L"" MTP_MANUFACTURER);
882 usb_mtp_add_wstr(d, L"" MTP_PRODUCT);
883 usb_mtp_add_wstr(d, L"0.1");
884 usb_mtp_add_wstr(d, L"0123456789abcdef0123456789abcdef");
885
886 return d;
887 }
888
889 static MTPData *usb_mtp_get_storage_ids(MTPState *s, MTPControl *c)
890 {
891 static const uint32_t ids[] = {
892 QEMU_STORAGE_ID,
893 };
894 MTPData *d = usb_mtp_data_alloc(c);
895
896 trace_usb_mtp_op_get_storage_ids(s->dev.addr);
897
898 usb_mtp_add_u32_array(d, ARRAY_SIZE(ids), ids);
899
900 return d;
901 }
902
903 static MTPData *usb_mtp_get_storage_info(MTPState *s, MTPControl *c)
904 {
905 MTPData *d = usb_mtp_data_alloc(c);
906 struct statvfs buf;
907 int rc;
908
909 trace_usb_mtp_op_get_storage_info(s->dev.addr);
910
911 if (FLAG_SET(s, MTP_FLAG_WRITABLE)) {
912 usb_mtp_add_u16(d, 0x0003);
913 usb_mtp_add_u16(d, 0x0002);
914 usb_mtp_add_u16(d, 0x0000);
915 } else {
916 usb_mtp_add_u16(d, 0x0001);
917 usb_mtp_add_u16(d, 0x0002);
918 usb_mtp_add_u16(d, 0x0001);
919 }
920
921 rc = statvfs(s->root, &buf);
922 if (rc == 0) {
923 usb_mtp_add_u64(d, (uint64_t)buf.f_frsize * buf.f_blocks);
924 usb_mtp_add_u64(d, (uint64_t)buf.f_bavail * buf.f_blocks);
925 usb_mtp_add_u32(d, buf.f_ffree);
926 } else {
927 usb_mtp_add_u64(d, 0xffffffff);
928 usb_mtp_add_u64(d, 0xffffffff);
929 usb_mtp_add_u32(d, 0xffffffff);
930 }
931
932 usb_mtp_add_str(d, s->desc);
933 usb_mtp_add_wstr(d, L"123456789abcdef");
934 return d;
935 }
936
937 static MTPData *usb_mtp_get_object_handles(MTPState *s, MTPControl *c,
938 MTPObject *o)
939 {
940 MTPData *d = usb_mtp_data_alloc(c);
941 uint32_t i = 0, handles[o->nchildren];
942 MTPObject *iter;
943
944 trace_usb_mtp_op_get_object_handles(s->dev.addr, o->handle, o->path);
945
946 QLIST_FOREACH(iter, &o->children, list) {
947 handles[i++] = iter->handle;
948 }
949 assert(i == o->nchildren);
950 usb_mtp_add_u32_array(d, o->nchildren, handles);
951
952 return d;
953 }
954
955 static MTPData *usb_mtp_get_object_info(MTPState *s, MTPControl *c,
956 MTPObject *o)
957 {
958 MTPData *d = usb_mtp_data_alloc(c);
959
960 trace_usb_mtp_op_get_object_info(s->dev.addr, o->handle, o->path);
961
962 usb_mtp_add_u32(d, QEMU_STORAGE_ID);
963 usb_mtp_add_u16(d, o->format);
964 usb_mtp_add_u16(d, 0);
965
966 if (o->stat.st_size > 0xFFFFFFFF) {
967 usb_mtp_add_u32(d, 0xFFFFFFFF);
968 } else {
969 usb_mtp_add_u32(d, o->stat.st_size);
970 }
971
972 usb_mtp_add_u16(d, 0);
973 usb_mtp_add_u32(d, 0);
974 usb_mtp_add_u32(d, 0);
975 usb_mtp_add_u32(d, 0);
976 usb_mtp_add_u32(d, 0);
977 usb_mtp_add_u32(d, 0);
978 usb_mtp_add_u32(d, 0);
979
980 if (o->parent) {
981 usb_mtp_add_u32(d, o->parent->handle);
982 } else {
983 usb_mtp_add_u32(d, 0);
984 }
985 if (o->format == FMT_ASSOCIATION) {
986 usb_mtp_add_u16(d, 0x0001);
987 usb_mtp_add_u32(d, 0x00000001);
988 usb_mtp_add_u32(d, 0);
989 } else {
990 usb_mtp_add_u16(d, 0);
991 usb_mtp_add_u32(d, 0);
992 usb_mtp_add_u32(d, 0);
993 }
994
995 usb_mtp_add_str(d, o->name);
996 usb_mtp_add_time(d, o->stat.st_ctime);
997 usb_mtp_add_time(d, o->stat.st_mtime);
998 usb_mtp_add_wstr(d, L"");
999
1000 return d;
1001 }
1002
1003 static MTPData *usb_mtp_get_object(MTPState *s, MTPControl *c,
1004 MTPObject *o)
1005 {
1006 MTPData *d = usb_mtp_data_alloc(c);
1007
1008 trace_usb_mtp_op_get_object(s->dev.addr, o->handle, o->path);
1009
1010 d->fd = open(o->path, O_RDONLY);
1011 if (d->fd == -1) {
1012 usb_mtp_data_free(d);
1013 return NULL;
1014 }
1015 d->length = o->stat.st_size;
1016 d->alloc = 512;
1017 d->data = g_malloc(d->alloc);
1018 return d;
1019 }
1020
1021 static MTPData *usb_mtp_get_partial_object(MTPState *s, MTPControl *c,
1022 MTPObject *o)
1023 {
1024 MTPData *d;
1025 off_t offset;
1026
1027 if (c->argc <= 2) {
1028 return NULL;
1029 }
1030 trace_usb_mtp_op_get_partial_object(s->dev.addr, o->handle, o->path,
1031 c->argv[1], c->argv[2]);
1032
1033 d = usb_mtp_data_alloc(c);
1034 d->fd = open(o->path, O_RDONLY);
1035 if (d->fd == -1) {
1036 usb_mtp_data_free(d);
1037 return NULL;
1038 }
1039
1040 offset = c->argv[1];
1041 if (offset > o->stat.st_size) {
1042 offset = o->stat.st_size;
1043 }
1044 if (lseek(d->fd, offset, SEEK_SET) < 0) {
1045 usb_mtp_data_free(d);
1046 return NULL;
1047 }
1048
1049 d->length = c->argv[2];
1050 if (d->length > o->stat.st_size - offset) {
1051 d->length = o->stat.st_size - offset;
1052 }
1053
1054 return d;
1055 }
1056
1057 static MTPData *usb_mtp_get_object_props_supported(MTPState *s, MTPControl *c)
1058 {
1059 static const uint16_t props[] = {
1060 PROP_STORAGE_ID,
1061 PROP_OBJECT_FORMAT,
1062 PROP_OBJECT_COMPRESSED_SIZE,
1063 PROP_PARENT_OBJECT,
1064 PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER,
1065 PROP_NAME,
1066 };
1067 MTPData *d = usb_mtp_data_alloc(c);
1068 usb_mtp_add_u16_array(d, ARRAY_SIZE(props), props);
1069
1070 return d;
1071 }
1072
1073 static MTPData *usb_mtp_get_object_prop_desc(MTPState *s, MTPControl *c)
1074 {
1075 MTPData *d = usb_mtp_data_alloc(c);
1076 switch (c->argv[0]) {
1077 case PROP_STORAGE_ID:
1078 usb_mtp_add_u16(d, PROP_STORAGE_ID);
1079 usb_mtp_add_u16(d, DATA_TYPE_UINT32);
1080 usb_mtp_add_u8(d, 0x00);
1081 usb_mtp_add_u32(d, 0x00000000);
1082 usb_mtp_add_u32(d, 0x00000000);
1083 usb_mtp_add_u8(d, 0x00);
1084 break;
1085 case PROP_OBJECT_FORMAT:
1086 usb_mtp_add_u16(d, PROP_OBJECT_FORMAT);
1087 usb_mtp_add_u16(d, DATA_TYPE_UINT16);
1088 usb_mtp_add_u8(d, 0x00);
1089 usb_mtp_add_u16(d, 0x0000);
1090 usb_mtp_add_u32(d, 0x00000000);
1091 usb_mtp_add_u8(d, 0x00);
1092 break;
1093 case PROP_OBJECT_COMPRESSED_SIZE:
1094 usb_mtp_add_u16(d, PROP_OBJECT_COMPRESSED_SIZE);
1095 usb_mtp_add_u16(d, DATA_TYPE_UINT64);
1096 usb_mtp_add_u8(d, 0x00);
1097 usb_mtp_add_u64(d, 0x0000000000000000);
1098 usb_mtp_add_u32(d, 0x00000000);
1099 usb_mtp_add_u8(d, 0x00);
1100 break;
1101 case PROP_PARENT_OBJECT:
1102 usb_mtp_add_u16(d, PROP_PARENT_OBJECT);
1103 usb_mtp_add_u16(d, DATA_TYPE_UINT32);
1104 usb_mtp_add_u8(d, 0x00);
1105 usb_mtp_add_u32(d, 0x00000000);
1106 usb_mtp_add_u32(d, 0x00000000);
1107 usb_mtp_add_u8(d, 0x00);
1108 break;
1109 case PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER:
1110 usb_mtp_add_u16(d, PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER);
1111 usb_mtp_add_u16(d, DATA_TYPE_UINT128);
1112 usb_mtp_add_u8(d, 0x00);
1113 usb_mtp_add_u64(d, 0x0000000000000000);
1114 usb_mtp_add_u64(d, 0x0000000000000000);
1115 usb_mtp_add_u32(d, 0x00000000);
1116 usb_mtp_add_u8(d, 0x00);
1117 break;
1118 case PROP_NAME:
1119 usb_mtp_add_u16(d, PROP_NAME);
1120 usb_mtp_add_u16(d, DATA_TYPE_STRING);
1121 usb_mtp_add_u8(d, 0x00);
1122 usb_mtp_add_u8(d, 0x00);
1123 usb_mtp_add_u32(d, 0x00000000);
1124 usb_mtp_add_u8(d, 0x00);
1125 break;
1126 default:
1127 usb_mtp_data_free(d);
1128 return NULL;
1129 }
1130
1131 return d;
1132 }
1133
1134 static MTPData *usb_mtp_get_object_prop_value(MTPState *s, MTPControl *c,
1135 MTPObject *o)
1136 {
1137 MTPData *d = usb_mtp_data_alloc(c);
1138 switch (c->argv[1]) {
1139 case PROP_STORAGE_ID:
1140 usb_mtp_add_u32(d, QEMU_STORAGE_ID);
1141 break;
1142 case PROP_OBJECT_FORMAT:
1143 usb_mtp_add_u16(d, o->format);
1144 break;
1145 case PROP_OBJECT_COMPRESSED_SIZE:
1146 usb_mtp_add_u64(d, o->stat.st_size);
1147 break;
1148 case PROP_PARENT_OBJECT:
1149 if (o->parent == NULL) {
1150 usb_mtp_add_u32(d, 0x00000000);
1151 } else {
1152 usb_mtp_add_u32(d, o->parent->handle);
1153 }
1154 break;
1155 case PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER:
1156 /* Should be persistent between sessions,
1157 * but using our objedt ID is "good enough"
1158 * for now */
1159 usb_mtp_add_u64(d, 0x0000000000000000);
1160 usb_mtp_add_u64(d, o->handle);
1161 break;
1162 case PROP_NAME:
1163 usb_mtp_add_str(d, o->name);
1164 break;
1165 default:
1166 usb_mtp_data_free(d);
1167 return NULL;
1168 }
1169
1170 return d;
1171 }
1172
1173 /* Return correct return code for a delete event */
1174 enum {
1175 ALL_DELETE,
1176 PARTIAL_DELETE,
1177 READ_ONLY,
1178 };
1179
1180 /* Assumes that children, if any, have been already freed */
1181 static void usb_mtp_object_free_one(MTPState *s, MTPObject *o)
1182 {
1183 #ifndef CONFIG_INOTIFY1
1184 assert(o->nchildren == 0);
1185 QTAILQ_REMOVE(&s->objects, o, next);
1186 g_free(o->name);
1187 g_free(o->path);
1188 g_free(o);
1189 #endif
1190 }
1191
1192 static int usb_mtp_deletefn(MTPState *s, MTPObject *o, uint32_t trans)
1193 {
1194 MTPObject *iter, *iter2;
1195 bool partial_delete = false;
1196 bool success = false;
1197
1198 /*
1199 * TODO: Add support for Protection Status
1200 */
1201
1202 QLIST_FOREACH(iter, &o->children, list) {
1203 if (iter->format == FMT_ASSOCIATION) {
1204 QLIST_FOREACH(iter2, &iter->children, list) {
1205 usb_mtp_deletefn(s, iter2, trans);
1206 }
1207 }
1208 }
1209
1210 if (o->format == FMT_UNDEFINED_OBJECT) {
1211 if (remove(o->path)) {
1212 partial_delete = true;
1213 } else {
1214 usb_mtp_object_free_one(s, o);
1215 success = true;
1216 }
1217 }
1218
1219 if (o->format == FMT_ASSOCIATION) {
1220 if (rmdir(o->path)) {
1221 partial_delete = true;
1222 } else {
1223 usb_mtp_object_free_one(s, o);
1224 success = true;
1225 }
1226 }
1227
1228 if (success && partial_delete) {
1229 return PARTIAL_DELETE;
1230 }
1231 if (!success && partial_delete) {
1232 return READ_ONLY;
1233 }
1234 return ALL_DELETE;
1235 }
1236
1237 static void usb_mtp_object_delete(MTPState *s, uint32_t handle,
1238 uint32_t format_code, uint32_t trans)
1239 {
1240 MTPObject *o;
1241 int ret;
1242
1243 /* Return error if store is read-only */
1244 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) {
1245 usb_mtp_queue_result(s, RES_STORE_READ_ONLY,
1246 trans, 0, 0, 0, 0);
1247 return;
1248 }
1249
1250 if (format_code != 0) {
1251 usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED,
1252 trans, 0, 0, 0, 0);
1253 return;
1254 }
1255
1256 if (handle == 0xFFFFFFF) {
1257 o = QTAILQ_FIRST(&s->objects);
1258 } else {
1259 o = usb_mtp_object_lookup(s, handle);
1260 }
1261 if (o == NULL) {
1262 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1263 trans, 0, 0, 0, 0);
1264 return;
1265 }
1266
1267 ret = usb_mtp_deletefn(s, o, trans);
1268 if (ret == PARTIAL_DELETE) {
1269 usb_mtp_queue_result(s, RES_PARTIAL_DELETE,
1270 trans, 0, 0, 0, 0);
1271 return;
1272 } else if (ret == READ_ONLY) {
1273 usb_mtp_queue_result(s, RES_STORE_READ_ONLY, trans,
1274 0, 0, 0, 0);
1275 return;
1276 } else {
1277 usb_mtp_queue_result(s, RES_OK, trans,
1278 0, 0, 0, 0);
1279 return;
1280 }
1281 }
1282
1283 static void usb_mtp_command(MTPState *s, MTPControl *c)
1284 {
1285 MTPData *data_in = NULL;
1286 MTPObject *o = NULL;
1287 uint32_t nres = 0, res0 = 0;
1288
1289 /* sanity checks */
1290 if (c->code >= CMD_CLOSE_SESSION && s->session == 0) {
1291 usb_mtp_queue_result(s, RES_SESSION_NOT_OPEN,
1292 c->trans, 0, 0, 0, 0);
1293 return;
1294 }
1295
1296 /* process commands */
1297 switch (c->code) {
1298 case CMD_GET_DEVICE_INFO:
1299 data_in = usb_mtp_get_device_info(s, c);
1300 break;
1301 case CMD_OPEN_SESSION:
1302 if (s->session) {
1303 usb_mtp_queue_result(s, RES_SESSION_ALREADY_OPEN,
1304 c->trans, 1, s->session, 0, 0);
1305 return;
1306 }
1307 if (c->argv[0] == 0) {
1308 usb_mtp_queue_result(s, RES_INVALID_PARAMETER,
1309 c->trans, 0, 0, 0, 0);
1310 return;
1311 }
1312 trace_usb_mtp_op_open_session(s->dev.addr);
1313 s->session = c->argv[0];
1314 usb_mtp_object_alloc(s, s->next_handle++, NULL, s->root);
1315 #ifdef CONFIG_INOTIFY1
1316 if (usb_mtp_inotify_init(s)) {
1317 fprintf(stderr, "usb-mtp: file monitoring init failed\n");
1318 }
1319 #endif
1320 break;
1321 case CMD_CLOSE_SESSION:
1322 trace_usb_mtp_op_close_session(s->dev.addr);
1323 s->session = 0;
1324 s->next_handle = 0;
1325 #ifdef CONFIG_INOTIFY1
1326 usb_mtp_inotify_cleanup(s);
1327 #endif
1328 usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects));
1329 assert(QTAILQ_EMPTY(&s->objects));
1330 break;
1331 case CMD_GET_STORAGE_IDS:
1332 data_in = usb_mtp_get_storage_ids(s, c);
1333 break;
1334 case CMD_GET_STORAGE_INFO:
1335 if (c->argv[0] != QEMU_STORAGE_ID &&
1336 c->argv[0] != 0xffffffff) {
1337 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID,
1338 c->trans, 0, 0, 0, 0);
1339 return;
1340 }
1341 data_in = usb_mtp_get_storage_info(s, c);
1342 break;
1343 case CMD_GET_NUM_OBJECTS:
1344 case CMD_GET_OBJECT_HANDLES:
1345 if (c->argv[0] != QEMU_STORAGE_ID &&
1346 c->argv[0] != 0xffffffff) {
1347 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID,
1348 c->trans, 0, 0, 0, 0);
1349 return;
1350 }
1351 if (c->argv[1] != 0x00000000) {
1352 usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED,
1353 c->trans, 0, 0, 0, 0);
1354 return;
1355 }
1356 if (c->argv[2] == 0x00000000 ||
1357 c->argv[2] == 0xffffffff) {
1358 o = QTAILQ_FIRST(&s->objects);
1359 } else {
1360 o = usb_mtp_object_lookup(s, c->argv[2]);
1361 }
1362 if (o == NULL) {
1363 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1364 c->trans, 0, 0, 0, 0);
1365 return;
1366 }
1367 if (o->format != FMT_ASSOCIATION) {
1368 usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT,
1369 c->trans, 0, 0, 0, 0);
1370 return;
1371 }
1372 usb_mtp_object_readdir(s, o);
1373 if (c->code == CMD_GET_NUM_OBJECTS) {
1374 trace_usb_mtp_op_get_num_objects(s->dev.addr, o->handle, o->path);
1375 nres = 1;
1376 res0 = o->nchildren;
1377 } else {
1378 data_in = usb_mtp_get_object_handles(s, c, o);
1379 }
1380 break;
1381 case CMD_GET_OBJECT_INFO:
1382 o = usb_mtp_object_lookup(s, c->argv[0]);
1383 if (o == NULL) {
1384 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1385 c->trans, 0, 0, 0, 0);
1386 return;
1387 }
1388 data_in = usb_mtp_get_object_info(s, c, o);
1389 break;
1390 case CMD_GET_OBJECT:
1391 o = usb_mtp_object_lookup(s, c->argv[0]);
1392 if (o == NULL) {
1393 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1394 c->trans, 0, 0, 0, 0);
1395 return;
1396 }
1397 if (o->format == FMT_ASSOCIATION) {
1398 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1399 c->trans, 0, 0, 0, 0);
1400 return;
1401 }
1402 data_in = usb_mtp_get_object(s, c, o);
1403 if (data_in == NULL) {
1404 usb_mtp_queue_result(s, RES_GENERAL_ERROR,
1405 c->trans, 0, 0, 0, 0);
1406 return;
1407 }
1408 break;
1409 case CMD_DELETE_OBJECT:
1410 usb_mtp_object_delete(s, c->argv[0], c->argv[1], c->trans);
1411 return;
1412 case CMD_GET_PARTIAL_OBJECT:
1413 o = usb_mtp_object_lookup(s, c->argv[0]);
1414 if (o == NULL) {
1415 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1416 c->trans, 0, 0, 0, 0);
1417 return;
1418 }
1419 if (o->format == FMT_ASSOCIATION) {
1420 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1421 c->trans, 0, 0, 0, 0);
1422 return;
1423 }
1424 data_in = usb_mtp_get_partial_object(s, c, o);
1425 if (data_in == NULL) {
1426 usb_mtp_queue_result(s, RES_GENERAL_ERROR,
1427 c->trans, 0, 0, 0, 0);
1428 return;
1429 }
1430 nres = 1;
1431 res0 = data_in->length;
1432 break;
1433 case CMD_SEND_OBJECT_INFO:
1434 /* Return error if store is read-only */
1435 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) {
1436 usb_mtp_queue_result(s, RES_STORE_READ_ONLY,
1437 c->trans, 0, 0, 0, 0);
1438 } else if (c->argv[0] && (c->argv[0] != QEMU_STORAGE_ID)) {
1439 /* First parameter points to storage id or is 0 */
1440 usb_mtp_queue_result(s, RES_STORE_NOT_AVAILABLE, c->trans,
1441 0, 0, 0, 0);
1442 } else if (c->argv[1] && !c->argv[0]) {
1443 /* If second parameter is specified, first must also be specified */
1444 usb_mtp_queue_result(s, RES_DESTINATION_UNSUPPORTED, c->trans,
1445 0, 0, 0, 0);
1446 } else {
1447 uint32_t handle = c->argv[1];
1448 if (handle == 0xFFFFFFFF || handle == 0) {
1449 /* root object */
1450 o = QTAILQ_FIRST(&s->objects);
1451 } else {
1452 o = usb_mtp_object_lookup(s, handle);
1453 }
1454 if (o == NULL) {
1455 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, c->trans,
1456 0, 0, 0, 0);
1457 } else if (o->format != FMT_ASSOCIATION) {
1458 usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT, c->trans,
1459 0, 0, 0, 0);
1460 }
1461 }
1462 if (o) {
1463 s->dataset.parent_handle = o->handle;
1464 }
1465 s->data_out = usb_mtp_data_alloc(c);
1466 return;
1467 case CMD_SEND_OBJECT:
1468 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) {
1469 usb_mtp_queue_result(s, RES_STORE_READ_ONLY,
1470 c->trans, 0, 0, 0, 0);
1471 return;
1472 }
1473 if (!s->write_pending) {
1474 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO,
1475 c->trans, 0, 0, 0, 0);
1476 return;
1477 }
1478 s->data_out = usb_mtp_data_alloc(c);
1479 return;
1480 case CMD_GET_OBJECT_PROPS_SUPPORTED:
1481 if (c->argv[0] != FMT_UNDEFINED_OBJECT &&
1482 c->argv[0] != FMT_ASSOCIATION) {
1483 usb_mtp_queue_result(s, RES_INVALID_OBJECT_FORMAT_CODE,
1484 c->trans, 0, 0, 0, 0);
1485 return;
1486 }
1487 data_in = usb_mtp_get_object_props_supported(s, c);
1488 break;
1489 case CMD_GET_OBJECT_PROP_DESC:
1490 if (c->argv[1] != FMT_UNDEFINED_OBJECT &&
1491 c->argv[1] != FMT_ASSOCIATION) {
1492 usb_mtp_queue_result(s, RES_INVALID_OBJECT_FORMAT_CODE,
1493 c->trans, 0, 0, 0, 0);
1494 return;
1495 }
1496 data_in = usb_mtp_get_object_prop_desc(s, c);
1497 if (data_in == NULL) {
1498 usb_mtp_queue_result(s, RES_INVALID_OBJECT_PROP_CODE,
1499 c->trans, 0, 0, 0, 0);
1500 return;
1501 }
1502 break;
1503 case CMD_GET_OBJECT_PROP_VALUE:
1504 o = usb_mtp_object_lookup(s, c->argv[0]);
1505 if (o == NULL) {
1506 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1507 c->trans, 0, 0, 0, 0);
1508 return;
1509 }
1510 data_in = usb_mtp_get_object_prop_value(s, c, o);
1511 if (data_in == NULL) {
1512 usb_mtp_queue_result(s, RES_INVALID_OBJECT_PROP_CODE,
1513 c->trans, 0, 0, 0, 0);
1514 return;
1515 }
1516 break;
1517 default:
1518 trace_usb_mtp_op_unknown(s->dev.addr, c->code);
1519 usb_mtp_queue_result(s, RES_OPERATION_NOT_SUPPORTED,
1520 c->trans, 0, 0, 0, 0);
1521 return;
1522 }
1523
1524 /* return results on success */
1525 if (data_in) {
1526 assert(s->data_in == NULL);
1527 s->data_in = data_in;
1528 }
1529 usb_mtp_queue_result(s, RES_OK, c->trans, nres, res0, 0, 0);
1530 }
1531
1532 /* ----------------------------------------------------------------------- */
1533
1534 static void usb_mtp_handle_reset(USBDevice *dev)
1535 {
1536 MTPState *s = USB_MTP(dev);
1537
1538 trace_usb_mtp_reset(s->dev.addr);
1539
1540 #ifdef CONFIG_INOTIFY1
1541 usb_mtp_inotify_cleanup(s);
1542 #endif
1543 usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects));
1544 s->session = 0;
1545 usb_mtp_data_free(s->data_in);
1546 s->data_in = NULL;
1547 usb_mtp_data_free(s->data_out);
1548 s->data_out = NULL;
1549 g_free(s->result);
1550 s->result = NULL;
1551 }
1552
1553 static void usb_mtp_handle_control(USBDevice *dev, USBPacket *p,
1554 int request, int value, int index,
1555 int length, uint8_t *data)
1556 {
1557 int ret;
1558 MTPState *s = USB_MTP(dev);
1559 uint16_t *event = (uint16_t *)data;
1560
1561 switch (request) {
1562 case ClassInterfaceOutRequest | 0x64:
1563 if (*event == EVT_CANCEL_TRANSACTION) {
1564 g_free(s->result);
1565 s->result = NULL;
1566 usb_mtp_data_free(s->data_in);
1567 s->data_in = NULL;
1568 if (s->write_pending) {
1569 g_free(s->dataset.filename);
1570 s->write_pending = false;
1571 s->dataset.size = 0;
1572 }
1573 usb_mtp_data_free(s->data_out);
1574 s->data_out = NULL;
1575 } else {
1576 p->status = USB_RET_STALL;
1577 }
1578 break;
1579 default:
1580 ret = usb_desc_handle_control(dev, p, request,
1581 value, index, length, data);
1582 if (ret >= 0) {
1583 return;
1584 }
1585 }
1586
1587 trace_usb_mtp_stall(dev->addr, "unknown control request");
1588 }
1589
1590 static void usb_mtp_cancel_packet(USBDevice *dev, USBPacket *p)
1591 {
1592 /* we don't use async packets, so this should never be called */
1593 fprintf(stderr, "%s\n", __func__);
1594 }
1595
1596 static void utf16_to_str(uint8_t len, uint16_t *arr, char *name)
1597 {
1598 int count;
1599 wchar_t *wstr = g_new0(wchar_t, len);
1600
1601 for (count = 0; count < len; count++) {
1602 wstr[count] = (wchar_t)arr[count];
1603 }
1604
1605 wcstombs(name, wstr, len);
1606 g_free(wstr);
1607 }
1608
1609 /* Wrapper around write, returns 0 on failure */
1610 static uint64_t write_retry(int fd, void *buf, uint64_t size)
1611 {
1612 uint64_t bytes_left = size, ret;
1613
1614 while (bytes_left > 0) {
1615 ret = write(fd, buf, bytes_left);
1616 if ((ret == -1) && (errno != EINTR || errno != EAGAIN ||
1617 errno != EWOULDBLOCK)) {
1618 break;
1619 }
1620 bytes_left -= ret;
1621 buf += ret;
1622 }
1623
1624 return size - bytes_left;
1625 }
1626
1627 static void usb_mtp_write_data(MTPState *s)
1628 {
1629 MTPData *d = s->data_out;
1630 MTPObject *parent =
1631 usb_mtp_object_lookup(s, s->dataset.parent_handle);
1632 char *path = NULL;
1633 uint64_t rc;
1634 mode_t mask = 0644;
1635
1636 assert(d != NULL);
1637
1638 if (parent == NULL || !s->write_pending) {
1639 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, d->trans,
1640 0, 0, 0, 0);
1641 return;
1642 }
1643
1644 if (s->dataset.filename) {
1645 path = g_strdup_printf("%s/%s", parent->path, s->dataset.filename);
1646 if (s->dataset.format == FMT_ASSOCIATION) {
1647 d->fd = mkdir(path, mask);
1648 goto free;
1649 }
1650 if ((s->dataset.size != 0xFFFFFFFF) && (s->dataset.size < d->length)) {
1651 usb_mtp_queue_result(s, RES_STORE_FULL, d->trans,
1652 0, 0, 0, 0);
1653 goto done;
1654 }
1655 d->fd = open(path, O_CREAT | O_WRONLY, mask);
1656 if (d->fd == -1) {
1657 usb_mtp_queue_result(s, RES_STORE_FULL, d->trans,
1658 0, 0, 0, 0);
1659 goto done;
1660 }
1661
1662 /*
1663 * Return success if initiator sent 0 sized data
1664 */
1665 if (!s->dataset.size) {
1666 goto success;
1667 }
1668
1669 rc = write_retry(d->fd, d->data, d->offset);
1670 if (rc != d->offset) {
1671 usb_mtp_queue_result(s, RES_STORE_FULL, d->trans,
1672 0, 0, 0, 0);
1673 goto done;
1674 }
1675 /* Only for < 4G file sizes */
1676 if (s->dataset.size != 0xFFFFFFFF && rc != s->dataset.size) {
1677 usb_mtp_queue_result(s, RES_INCOMPLETE_TRANSFER, d->trans,
1678 0, 0, 0, 0);
1679 goto done;
1680 }
1681 }
1682
1683 success:
1684 usb_mtp_queue_result(s, RES_OK, d->trans,
1685 0, 0, 0, 0);
1686
1687 done:
1688 /*
1689 * The write dataset is kept around and freed only
1690 * on success or if another write request comes in
1691 */
1692 if (d->fd != -1) {
1693 close(d->fd);
1694 }
1695 free:
1696 g_free(s->dataset.filename);
1697 s->dataset.size = 0;
1698 g_free(path);
1699 s->write_pending = false;
1700 }
1701
1702 static void usb_mtp_write_metadata(MTPState *s)
1703 {
1704 MTPData *d = s->data_out;
1705 ObjectInfo *dataset = (ObjectInfo *)d->data;
1706 char *filename = g_new0(char, dataset->length);
1707 MTPObject *o;
1708 MTPObject *p = usb_mtp_object_lookup(s, s->dataset.parent_handle);
1709 uint32_t next_handle = s->next_handle;
1710
1711 assert(!s->write_pending);
1712 assert(p != NULL);
1713
1714 utf16_to_str(dataset->length, dataset->filename, filename);
1715
1716 o = usb_mtp_object_lookup_name(p, filename, dataset->length);
1717 if (o != NULL) {
1718 next_handle = o->handle;
1719 }
1720
1721 s->dataset.filename = filename;
1722 s->dataset.format = dataset->format;
1723 s->dataset.size = dataset->size;
1724 s->dataset.filename = filename;
1725 s->write_pending = true;
1726
1727 if (s->dataset.format == FMT_ASSOCIATION) {
1728 usb_mtp_write_data(s);
1729 /* next_handle will be allocated to the newly created dir */
1730 if (d->fd == -1) {
1731 usb_mtp_queue_result(s, RES_STORE_FULL, d->trans,
1732 0, 0, 0, 0);
1733 return;
1734 }
1735 d->fd = -1;
1736 }
1737
1738 usb_mtp_queue_result(s, RES_OK, d->trans, 3, QEMU_STORAGE_ID,
1739 s->dataset.parent_handle, next_handle);
1740 }
1741
1742 static void usb_mtp_get_data(MTPState *s, mtp_container *container,
1743 USBPacket *p)
1744 {
1745 MTPData *d = s->data_out;
1746 uint64_t dlen;
1747 uint32_t data_len = p->iov.size;
1748 uint64_t total_len;
1749
1750 if (!d) {
1751 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, 0,
1752 0, 0, 0, 0);
1753 return;
1754 }
1755 if (d->first) {
1756 /* Total length of incoming data */
1757 total_len = cpu_to_le32(container->length) - sizeof(mtp_container);
1758 /* Length of data in this packet */
1759 data_len -= sizeof(mtp_container);
1760 usb_mtp_realloc(d, total_len);
1761 d->length += total_len;
1762 d->offset = 0;
1763 d->cached_length = total_len;
1764 d->first = false;
1765 d->pending = false;
1766 }
1767
1768 if (d->pending) {
1769 usb_mtp_realloc(d, d->cached_length);
1770 d->length += d->cached_length;
1771 d->pending = false;
1772 }
1773
1774 if (d->length - d->offset > data_len) {
1775 dlen = data_len;
1776 } else {
1777 dlen = d->length - d->offset;
1778 /* Check for cached data for large files */
1779 if ((s->dataset.size == 0xFFFFFFFF) && (dlen < p->iov.size)) {
1780 usb_mtp_realloc(d, p->iov.size - dlen);
1781 d->length += p->iov.size - dlen;
1782 dlen = p->iov.size;
1783 }
1784 }
1785
1786 switch (d->code) {
1787 case CMD_SEND_OBJECT_INFO:
1788 usb_packet_copy(p, d->data + d->offset, dlen);
1789 d->offset += dlen;
1790 if (d->offset == d->length) {
1791 /* The operation might have already failed */
1792 if (!s->result) {
1793 usb_mtp_write_metadata(s);
1794 }
1795 usb_mtp_data_free(s->data_out);
1796 s->data_out = NULL;
1797 return;
1798 }
1799 break;
1800 case CMD_SEND_OBJECT:
1801 usb_packet_copy(p, d->data + d->offset, dlen);
1802 d->offset += dlen;
1803 if ((p->iov.size % 64) || !p->iov.size) {
1804 assert((s->dataset.size == 0xFFFFFFFF) ||
1805 (s->dataset.size == d->length));
1806
1807 usb_mtp_write_data(s);
1808 usb_mtp_data_free(s->data_out);
1809 s->data_out = NULL;
1810 return;
1811 }
1812 if (d->offset == d->length) {
1813 d->pending = true;
1814 }
1815 break;
1816 default:
1817 p->status = USB_RET_STALL;
1818 return;
1819 }
1820 }
1821
1822 static void usb_mtp_handle_data(USBDevice *dev, USBPacket *p)
1823 {
1824 MTPState *s = USB_MTP(dev);
1825 MTPControl cmd;
1826 mtp_container container;
1827 uint32_t params[5];
1828 uint16_t container_type;
1829 int i, rc;
1830
1831 switch (p->ep->nr) {
1832 case EP_DATA_IN:
1833 if (s->data_out != NULL) {
1834 /* guest bug */
1835 trace_usb_mtp_stall(s->dev.addr, "awaiting data-out");
1836 p->status = USB_RET_STALL;
1837 return;
1838 }
1839 if (p->iov.size < sizeof(container)) {
1840 trace_usb_mtp_stall(s->dev.addr, "packet too small");
1841 p->status = USB_RET_STALL;
1842 return;
1843 }
1844 if (s->data_in != NULL) {
1845 MTPData *d = s->data_in;
1846 uint64_t dlen = d->length - d->offset;
1847 if (d->first) {
1848 trace_usb_mtp_data_in(s->dev.addr, d->trans, d->length);
1849 if (d->length + sizeof(container) > 0xFFFFFFFF) {
1850 container.length = cpu_to_le32(0xFFFFFFFF);
1851 } else {
1852 container.length =
1853 cpu_to_le32(d->length + sizeof(container));
1854 }
1855 container.type = cpu_to_le16(TYPE_DATA);
1856 container.code = cpu_to_le16(d->code);
1857 container.trans = cpu_to_le32(d->trans);
1858 usb_packet_copy(p, &container, sizeof(container));
1859 d->first = false;
1860 if (dlen > p->iov.size - sizeof(container)) {
1861 dlen = p->iov.size - sizeof(container);
1862 }
1863 } else {
1864 if (dlen > p->iov.size) {
1865 dlen = p->iov.size;
1866 }
1867 }
1868 if (d->fd == -1) {
1869 usb_packet_copy(p, d->data + d->offset, dlen);
1870 } else {
1871 if (d->alloc < p->iov.size) {
1872 d->alloc = p->iov.size;
1873 d->data = g_realloc(d->data, d->alloc);
1874 }
1875 rc = read(d->fd, d->data, dlen);
1876 if (rc != dlen) {
1877 memset(d->data, 0, dlen);
1878 s->result->code = RES_INCOMPLETE_TRANSFER;
1879 }
1880 usb_packet_copy(p, d->data, dlen);
1881 }
1882 d->offset += dlen;
1883 if (d->offset == d->length) {
1884 usb_mtp_data_free(s->data_in);
1885 s->data_in = NULL;
1886 }
1887 } else if (s->result != NULL) {
1888 MTPControl *r = s->result;
1889 int length = sizeof(container) + r->argc * sizeof(uint32_t);
1890 if (r->code == RES_OK) {
1891 trace_usb_mtp_success(s->dev.addr, r->trans,
1892 (r->argc > 0) ? r->argv[0] : 0,
1893 (r->argc > 1) ? r->argv[1] : 0);
1894 } else {
1895 trace_usb_mtp_error(s->dev.addr, r->code, r->trans,
1896 (r->argc > 0) ? r->argv[0] : 0,
1897 (r->argc > 1) ? r->argv[1] : 0);
1898 }
1899 container.length = cpu_to_le32(length);
1900 container.type = cpu_to_le16(TYPE_RESPONSE);
1901 container.code = cpu_to_le16(r->code);
1902 container.trans = cpu_to_le32(r->trans);
1903 for (i = 0; i < r->argc; i++) {
1904 params[i] = cpu_to_le32(r->argv[i]);
1905 }
1906 usb_packet_copy(p, &container, sizeof(container));
1907 usb_packet_copy(p, &params, length - sizeof(container));
1908 g_free(s->result);
1909 s->result = NULL;
1910 }
1911 break;
1912 case EP_DATA_OUT:
1913 if (p->iov.size < sizeof(container)) {
1914 trace_usb_mtp_stall(s->dev.addr, "packet too small");
1915 p->status = USB_RET_STALL;
1916 return;
1917 }
1918 if ((s->data_out != NULL) && !s->data_out->first) {
1919 container_type = TYPE_DATA;
1920 } else {
1921 usb_packet_copy(p, &container, sizeof(container));
1922 container_type = le16_to_cpu(container.type);
1923 }
1924 switch (container_type) {
1925 case TYPE_COMMAND:
1926 if (s->data_in || s->data_out || s->result) {
1927 trace_usb_mtp_stall(s->dev.addr, "transaction inflight");
1928 p->status = USB_RET_STALL;
1929 return;
1930 }
1931 cmd.code = le16_to_cpu(container.code);
1932 cmd.argc = (le32_to_cpu(container.length) - sizeof(container))
1933 / sizeof(uint32_t);
1934 cmd.trans = le32_to_cpu(container.trans);
1935 if (cmd.argc > ARRAY_SIZE(cmd.argv)) {
1936 cmd.argc = ARRAY_SIZE(cmd.argv);
1937 }
1938 if (p->iov.size < sizeof(container) + cmd.argc * sizeof(uint32_t)) {
1939 trace_usb_mtp_stall(s->dev.addr, "packet too small");
1940 p->status = USB_RET_STALL;
1941 return;
1942 }
1943 usb_packet_copy(p, &params, cmd.argc * sizeof(uint32_t));
1944 for (i = 0; i < cmd.argc; i++) {
1945 cmd.argv[i] = le32_to_cpu(params[i]);
1946 }
1947 trace_usb_mtp_command(s->dev.addr, cmd.code, cmd.trans,
1948 (cmd.argc > 0) ? cmd.argv[0] : 0,
1949 (cmd.argc > 1) ? cmd.argv[1] : 0,
1950 (cmd.argc > 2) ? cmd.argv[2] : 0,
1951 (cmd.argc > 3) ? cmd.argv[3] : 0,
1952 (cmd.argc > 4) ? cmd.argv[4] : 0);
1953 usb_mtp_command(s, &cmd);
1954 break;
1955 case TYPE_DATA:
1956 /* One of the previous transfers has already errored but the
1957 * responder is still sending data associated with it
1958 */
1959 if (s->result != NULL) {
1960 return;
1961 }
1962 usb_mtp_get_data(s, &container, p);
1963 break;
1964 default:
1965 /* not needed as long as the mtp device is read-only */
1966 p->status = USB_RET_STALL;
1967 return;
1968 }
1969 break;
1970 case EP_EVENT:
1971 #ifdef CONFIG_INOTIFY1
1972 if (!QTAILQ_EMPTY(&s->events)) {
1973 struct MTPMonEntry *e = QTAILQ_LAST(&s->events, events);
1974 uint32_t handle;
1975 int len = sizeof(container) + sizeof(uint32_t);
1976
1977 if (p->iov.size < len) {
1978 trace_usb_mtp_stall(s->dev.addr,
1979 "packet too small to send event");
1980 p->status = USB_RET_STALL;
1981 return;
1982 }
1983
1984 QTAILQ_REMOVE(&s->events, e, next);
1985 container.length = cpu_to_le32(len);
1986 container.type = cpu_to_le32(TYPE_EVENT);
1987 container.code = cpu_to_le16(e->event);
1988 container.trans = 0; /* no trans specific events */
1989 handle = cpu_to_le32(e->handle);
1990 usb_packet_copy(p, &container, sizeof(container));
1991 usb_packet_copy(p, &handle, sizeof(uint32_t));
1992 g_free(e);
1993 return;
1994 }
1995 #endif
1996 p->status = USB_RET_NAK;
1997 return;
1998 default:
1999 trace_usb_mtp_stall(s->dev.addr, "invalid endpoint");
2000 p->status = USB_RET_STALL;
2001 return;
2002 }
2003
2004 if (p->actual_length == 0) {
2005 trace_usb_mtp_nak(s->dev.addr, p->ep->nr);
2006 p->status = USB_RET_NAK;
2007 return;
2008 } else {
2009 trace_usb_mtp_xfer(s->dev.addr, p->ep->nr, p->actual_length,
2010 p->iov.size);
2011 return;
2012 }
2013 }
2014
2015 static void usb_mtp_realize(USBDevice *dev, Error **errp)
2016 {
2017 MTPState *s = USB_MTP(dev);
2018
2019 usb_desc_create_serial(dev);
2020 usb_desc_init(dev);
2021 QTAILQ_INIT(&s->objects);
2022 if (s->desc == NULL) {
2023 if (s->root == NULL) {
2024 error_setg(errp, "usb-mtp: rootdir property must be configured");
2025 return;
2026 }
2027 s->desc = strrchr(s->root, '/');
2028 if (s->desc && s->desc[0]) {
2029 s->desc = g_strdup(s->desc + 1);
2030 } else {
2031 s->desc = g_strdup("none");
2032 }
2033 }
2034 /* Mark store as RW */
2035 if (!s->readonly) {
2036 s->flags |= (1 << MTP_FLAG_WRITABLE);
2037 }
2038
2039 }
2040
2041 static const VMStateDescription vmstate_usb_mtp = {
2042 .name = "usb-mtp",
2043 .unmigratable = 1,
2044 .version_id = 1,
2045 .minimum_version_id = 1,
2046 .fields = (VMStateField[]) {
2047 VMSTATE_USB_DEVICE(dev, MTPState),
2048 VMSTATE_END_OF_LIST()
2049 }
2050 };
2051
2052 static Property mtp_properties[] = {
2053 DEFINE_PROP_STRING("rootdir", MTPState, root),
2054 DEFINE_PROP_STRING("desc", MTPState, desc),
2055 DEFINE_PROP_BOOL("readonly", MTPState, readonly, true),
2056 DEFINE_PROP_END_OF_LIST(),
2057 };
2058
2059 static void usb_mtp_class_initfn(ObjectClass *klass, void *data)
2060 {
2061 DeviceClass *dc = DEVICE_CLASS(klass);
2062 USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
2063
2064 uc->realize = usb_mtp_realize;
2065 uc->product_desc = "QEMU USB MTP";
2066 uc->usb_desc = &desc;
2067 uc->cancel_packet = usb_mtp_cancel_packet;
2068 uc->handle_attach = usb_desc_attach;
2069 uc->handle_reset = usb_mtp_handle_reset;
2070 uc->handle_control = usb_mtp_handle_control;
2071 uc->handle_data = usb_mtp_handle_data;
2072 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
2073 dc->desc = "USB Media Transfer Protocol device";
2074 dc->fw_name = "mtp";
2075 dc->vmsd = &vmstate_usb_mtp;
2076 dc->props = mtp_properties;
2077 }
2078
2079 static TypeInfo mtp_info = {
2080 .name = TYPE_USB_MTP,
2081 .parent = TYPE_USB_DEVICE,
2082 .instance_size = sizeof(MTPState),
2083 .class_init = usb_mtp_class_initfn,
2084 };
2085
2086 static void usb_mtp_register_types(void)
2087 {
2088 type_register_static(&mtp_info);
2089 }
2090
2091 type_init(usb_mtp_register_types)