Merge tag 'pull-hex-20221003' of https://github.com/quic/qemu into staging
[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 "qemu-common.h"
14 #include "qapi/error.h"
15 #include "qemu/error-report.h"
16 #include <wchar.h>
17 #include <dirent.h>
18
19 #include <sys/statvfs.h>
20
21
22 #include "qemu/iov.h"
23 #include "qemu/module.h"
24 #include "qemu/filemonitor.h"
25 #include "trace.h"
26 #include "hw/qdev-properties.h"
27 #include "hw/usb.h"
28 #include "migration/vmstate.h"
29 #include "desc.h"
30 #include "qemu/units.h"
31 #include "qom/object.h"
32
33 /* ----------------------------------------------------------------------- */
34
35 enum mtp_container_type {
36 TYPE_COMMAND = 1,
37 TYPE_DATA = 2,
38 TYPE_RESPONSE = 3,
39 TYPE_EVENT = 4,
40 };
41
42 /* MTP write stage, for internal use only */
43 enum mtp_write_status {
44 WRITE_START = 1,
45 WRITE_CONTINUE = 2,
46 WRITE_END = 3,
47 };
48
49 enum mtp_code {
50 /* command codes */
51 CMD_GET_DEVICE_INFO = 0x1001,
52 CMD_OPEN_SESSION = 0x1002,
53 CMD_CLOSE_SESSION = 0x1003,
54 CMD_GET_STORAGE_IDS = 0x1004,
55 CMD_GET_STORAGE_INFO = 0x1005,
56 CMD_GET_NUM_OBJECTS = 0x1006,
57 CMD_GET_OBJECT_HANDLES = 0x1007,
58 CMD_GET_OBJECT_INFO = 0x1008,
59 CMD_GET_OBJECT = 0x1009,
60 CMD_DELETE_OBJECT = 0x100b,
61 CMD_SEND_OBJECT_INFO = 0x100c,
62 CMD_SEND_OBJECT = 0x100d,
63 CMD_GET_PARTIAL_OBJECT = 0x101b,
64 CMD_GET_OBJECT_PROPS_SUPPORTED = 0x9801,
65 CMD_GET_OBJECT_PROP_DESC = 0x9802,
66 CMD_GET_OBJECT_PROP_VALUE = 0x9803,
67
68 /* response codes */
69 RES_OK = 0x2001,
70 RES_GENERAL_ERROR = 0x2002,
71 RES_SESSION_NOT_OPEN = 0x2003,
72 RES_INVALID_TRANSACTION_ID = 0x2004,
73 RES_OPERATION_NOT_SUPPORTED = 0x2005,
74 RES_PARAMETER_NOT_SUPPORTED = 0x2006,
75 RES_INCOMPLETE_TRANSFER = 0x2007,
76 RES_INVALID_STORAGE_ID = 0x2008,
77 RES_INVALID_OBJECT_HANDLE = 0x2009,
78 RES_INVALID_OBJECT_FORMAT_CODE = 0x200b,
79 RES_STORE_FULL = 0x200c,
80 RES_STORE_READ_ONLY = 0x200e,
81 RES_PARTIAL_DELETE = 0x2012,
82 RES_STORE_NOT_AVAILABLE = 0x2013,
83 RES_SPEC_BY_FORMAT_UNSUPPORTED = 0x2014,
84 RES_INVALID_OBJECTINFO = 0x2015,
85 RES_DESTINATION_UNSUPPORTED = 0x2020,
86 RES_INVALID_PARENT_OBJECT = 0x201a,
87 RES_INVALID_PARAMETER = 0x201d,
88 RES_SESSION_ALREADY_OPEN = 0x201e,
89 RES_INVALID_OBJECT_PROP_CODE = 0xA801,
90
91 /* format codes */
92 FMT_UNDEFINED_OBJECT = 0x3000,
93 FMT_ASSOCIATION = 0x3001,
94
95 /* event codes */
96 EVT_CANCEL_TRANSACTION = 0x4001,
97 EVT_OBJ_ADDED = 0x4002,
98 EVT_OBJ_REMOVED = 0x4003,
99 EVT_OBJ_INFO_CHANGED = 0x4007,
100
101 /* object properties */
102 PROP_STORAGE_ID = 0xDC01,
103 PROP_OBJECT_FORMAT = 0xDC02,
104 PROP_OBJECT_COMPRESSED_SIZE = 0xDC04,
105 PROP_PARENT_OBJECT = 0xDC0B,
106 PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER = 0xDC41,
107 PROP_NAME = 0xDC44,
108 };
109
110 enum mtp_data_type {
111 DATA_TYPE_UINT16 = 0x0004,
112 DATA_TYPE_UINT32 = 0x0006,
113 DATA_TYPE_UINT64 = 0x0008,
114 DATA_TYPE_UINT128 = 0x000a,
115 DATA_TYPE_STRING = 0xffff,
116 };
117
118 typedef struct {
119 uint32_t length;
120 uint16_t type;
121 uint16_t code;
122 uint32_t trans;
123 } QEMU_PACKED mtp_container;
124
125 /* ----------------------------------------------------------------------- */
126
127 typedef struct MTPState MTPState;
128 typedef struct MTPControl MTPControl;
129 typedef struct MTPData MTPData;
130 typedef struct MTPObject MTPObject;
131
132 enum {
133 EP_DATA_IN = 1,
134 EP_DATA_OUT,
135 EP_EVENT,
136 };
137
138 typedef struct MTPMonEntry MTPMonEntry;
139
140 struct MTPMonEntry {
141 uint32_t event;
142 uint32_t handle;
143
144 QTAILQ_ENTRY(MTPMonEntry) next;
145 };
146
147 struct MTPControl {
148 uint16_t code;
149 uint32_t trans;
150 int argc;
151 uint32_t argv[5];
152 };
153
154 struct MTPData {
155 uint16_t code;
156 uint32_t trans;
157 uint64_t offset;
158 uint64_t length;
159 uint64_t alloc;
160 uint8_t *data;
161 bool first;
162 /* Used for >4G file sizes */
163 bool pending;
164 int fd;
165 uint8_t write_status;
166 /* Internal pointer per every MTP_WRITE_BUF_SZ */
167 uint64_t data_offset;
168 };
169
170 struct MTPObject {
171 uint32_t handle;
172 uint16_t format;
173 char *name;
174 char *path;
175 struct stat stat;
176 /* file monitor watch id */
177 int64_t watchid;
178 MTPObject *parent;
179 uint32_t nchildren;
180 QLIST_HEAD(, MTPObject) children;
181 QLIST_ENTRY(MTPObject) list;
182 bool have_children;
183 QTAILQ_ENTRY(MTPObject) next;
184 };
185
186 struct MTPState {
187 USBDevice dev;
188 char *root;
189 char *desc;
190 uint32_t flags;
191
192 MTPData *data_in;
193 MTPData *data_out;
194 MTPControl *result;
195 uint32_t session;
196 uint32_t next_handle;
197 bool readonly;
198
199 QTAILQ_HEAD(, MTPObject) objects;
200 QFileMonitor *file_monitor;
201 QTAILQ_HEAD(, MTPMonEntry) events;
202 /* Responder is expecting a write operation */
203 bool write_pending;
204 struct {
205 uint32_t parent_handle;
206 uint16_t format;
207 uint32_t size;
208 char *filename;
209 } dataset;
210 };
211
212 /*
213 * ObjectInfo dataset received from initiator
214 * Fields we don't care about are ignored
215 */
216 typedef struct {
217 uint32_t storage_id; /*unused*/
218 uint16_t format;
219 uint16_t protection_status; /*unused*/
220 uint32_t size;
221 uint16_t thumb_format; /*unused*/
222 uint32_t thumb_comp_sz; /*unused*/
223 uint32_t thumb_pix_width; /*unused*/
224 uint32_t thumb_pix_height; /*unused*/
225 uint32_t image_pix_width; /*unused*/
226 uint32_t image_pix_height; /*unused*/
227 uint32_t image_bit_depth; /*unused*/
228 uint32_t parent; /*unused*/
229 uint16_t assoc_type;
230 uint32_t assoc_desc;
231 uint32_t seq_no; /*unused*/
232 uint8_t length; /*part of filename field*/
233 uint8_t filename[0]; /* UTF-16 encoded */
234 char date_created[0]; /*unused*/
235 char date_modified[0]; /*unused*/
236 char keywords[0]; /*unused*/
237 /* string and other data follows */
238 } QEMU_PACKED ObjectInfo;
239
240 #define TYPE_USB_MTP "usb-mtp"
241 OBJECT_DECLARE_SIMPLE_TYPE(MTPState, USB_MTP)
242
243 #define QEMU_STORAGE_ID 0x00010001
244
245 #define MTP_FLAG_WRITABLE 0
246
247 #define FLAG_SET(_mtp, _flag) ((_mtp)->flags & (1 << (_flag)))
248
249 /* ----------------------------------------------------------------------- */
250
251 #define MTP_MANUFACTURER "QEMU"
252 #define MTP_PRODUCT "QEMU filesharing"
253 #define MTP_WRITE_BUF_SZ (512 * KiB)
254
255 enum {
256 STR_MANUFACTURER = 1,
257 STR_PRODUCT,
258 STR_SERIALNUMBER,
259 STR_MTP,
260 STR_CONFIG_FULL,
261 STR_CONFIG_HIGH,
262 STR_CONFIG_SUPER,
263 };
264
265 static const USBDescStrings desc_strings = {
266 [STR_MANUFACTURER] = MTP_MANUFACTURER,
267 [STR_PRODUCT] = MTP_PRODUCT,
268 [STR_SERIALNUMBER] = "34617",
269 [STR_MTP] = "MTP",
270 [STR_CONFIG_FULL] = "Full speed config (usb 1.1)",
271 [STR_CONFIG_HIGH] = "High speed config (usb 2.0)",
272 [STR_CONFIG_SUPER] = "Super speed config (usb 3.0)",
273 };
274
275 static const USBDescIface desc_iface_full = {
276 .bInterfaceNumber = 0,
277 .bNumEndpoints = 3,
278 .bInterfaceClass = USB_CLASS_STILL_IMAGE,
279 .bInterfaceSubClass = 0x01,
280 .bInterfaceProtocol = 0x01,
281 .iInterface = STR_MTP,
282 .eps = (USBDescEndpoint[]) {
283 {
284 .bEndpointAddress = USB_DIR_IN | EP_DATA_IN,
285 .bmAttributes = USB_ENDPOINT_XFER_BULK,
286 .wMaxPacketSize = 64,
287 },{
288 .bEndpointAddress = USB_DIR_OUT | EP_DATA_OUT,
289 .bmAttributes = USB_ENDPOINT_XFER_BULK,
290 .wMaxPacketSize = 64,
291 },{
292 .bEndpointAddress = USB_DIR_IN | EP_EVENT,
293 .bmAttributes = USB_ENDPOINT_XFER_INT,
294 .wMaxPacketSize = 64,
295 .bInterval = 0x0a,
296 },
297 }
298 };
299
300 static const USBDescDevice desc_device_full = {
301 .bcdUSB = 0x0200,
302 .bMaxPacketSize0 = 8,
303 .bNumConfigurations = 1,
304 .confs = (USBDescConfig[]) {
305 {
306 .bNumInterfaces = 1,
307 .bConfigurationValue = 1,
308 .iConfiguration = STR_CONFIG_FULL,
309 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP,
310 .bMaxPower = 2,
311 .nif = 1,
312 .ifs = &desc_iface_full,
313 },
314 },
315 };
316
317 static const USBDescIface desc_iface_high = {
318 .bInterfaceNumber = 0,
319 .bNumEndpoints = 3,
320 .bInterfaceClass = USB_CLASS_STILL_IMAGE,
321 .bInterfaceSubClass = 0x01,
322 .bInterfaceProtocol = 0x01,
323 .iInterface = STR_MTP,
324 .eps = (USBDescEndpoint[]) {
325 {
326 .bEndpointAddress = USB_DIR_IN | EP_DATA_IN,
327 .bmAttributes = USB_ENDPOINT_XFER_BULK,
328 .wMaxPacketSize = 512,
329 },{
330 .bEndpointAddress = USB_DIR_OUT | EP_DATA_OUT,
331 .bmAttributes = USB_ENDPOINT_XFER_BULK,
332 .wMaxPacketSize = 512,
333 },{
334 .bEndpointAddress = USB_DIR_IN | EP_EVENT,
335 .bmAttributes = USB_ENDPOINT_XFER_INT,
336 .wMaxPacketSize = 64,
337 .bInterval = 0x0a,
338 },
339 }
340 };
341
342 static const USBDescDevice desc_device_high = {
343 .bcdUSB = 0x0200,
344 .bMaxPacketSize0 = 64,
345 .bNumConfigurations = 1,
346 .confs = (USBDescConfig[]) {
347 {
348 .bNumInterfaces = 1,
349 .bConfigurationValue = 1,
350 .iConfiguration = STR_CONFIG_HIGH,
351 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP,
352 .bMaxPower = 2,
353 .nif = 1,
354 .ifs = &desc_iface_high,
355 },
356 },
357 };
358
359 static const USBDescMSOS desc_msos = {
360 .CompatibleID = "MTP",
361 .SelectiveSuspendEnabled = true,
362 };
363
364 static const USBDesc desc = {
365 .id = {
366 .idVendor = 0x46f4, /* CRC16() of "QEMU" */
367 .idProduct = 0x0004,
368 .bcdDevice = 0,
369 .iManufacturer = STR_MANUFACTURER,
370 .iProduct = STR_PRODUCT,
371 .iSerialNumber = STR_SERIALNUMBER,
372 },
373 .full = &desc_device_full,
374 .high = &desc_device_high,
375 .str = desc_strings,
376 .msos = &desc_msos,
377 };
378
379 /* ----------------------------------------------------------------------- */
380
381 static MTPObject *usb_mtp_object_alloc(MTPState *s, uint32_t handle,
382 MTPObject *parent, const char *name)
383 {
384 MTPObject *o = g_new0(MTPObject, 1);
385
386 if (name[0] == '.') {
387 goto ignore;
388 }
389
390 o->watchid = -1;
391 o->handle = handle;
392 o->parent = parent;
393 o->name = g_strdup(name);
394 if (parent == NULL) {
395 o->path = g_strdup(name);
396 } else {
397 o->path = g_strdup_printf("%s/%s", parent->path, name);
398 }
399
400 if (lstat(o->path, &o->stat) != 0) {
401 goto ignore;
402 }
403 if (S_ISREG(o->stat.st_mode)) {
404 o->format = FMT_UNDEFINED_OBJECT;
405 } else if (S_ISDIR(o->stat.st_mode)) {
406 o->format = FMT_ASSOCIATION;
407 } else {
408 goto ignore;
409 }
410
411 if (access(o->path, R_OK) != 0) {
412 goto ignore;
413 }
414
415 trace_usb_mtp_object_alloc(s->dev.addr, o->handle, o->path);
416
417 QTAILQ_INSERT_TAIL(&s->objects, o, next);
418 return o;
419
420 ignore:
421 g_free(o->name);
422 g_free(o->path);
423 g_free(o);
424 return NULL;
425 }
426
427 static void usb_mtp_object_free(MTPState *s, MTPObject *o)
428 {
429 MTPObject *iter;
430
431 if (!o) {
432 return;
433 }
434
435 trace_usb_mtp_object_free(s->dev.addr, o->handle, o->path);
436
437 if (o->watchid != -1 && s->file_monitor) {
438 qemu_file_monitor_remove_watch(s->file_monitor, o->path, o->watchid);
439 }
440
441 QTAILQ_REMOVE(&s->objects, o, next);
442 if (o->parent) {
443 QLIST_REMOVE(o, list);
444 o->parent->nchildren--;
445 }
446
447 while (!QLIST_EMPTY(&o->children)) {
448 iter = QLIST_FIRST(&o->children);
449 usb_mtp_object_free(s, iter);
450 }
451 g_free(o->name);
452 g_free(o->path);
453 g_free(o);
454 }
455
456 static MTPObject *usb_mtp_object_lookup(MTPState *s, uint32_t handle)
457 {
458 MTPObject *o;
459
460 QTAILQ_FOREACH(o, &s->objects, next) {
461 if (o->handle == handle) {
462 return o;
463 }
464 }
465 return NULL;
466 }
467
468 static MTPObject *usb_mtp_add_child(MTPState *s, MTPObject *o,
469 const char *name)
470 {
471 MTPObject *child =
472 usb_mtp_object_alloc(s, s->next_handle++, o, name);
473
474 if (child) {
475 trace_usb_mtp_add_child(s->dev.addr, child->handle, child->path);
476 QLIST_INSERT_HEAD(&o->children, child, list);
477 o->nchildren++;
478
479 if (child->format == FMT_ASSOCIATION) {
480 QLIST_INIT(&child->children);
481 }
482 }
483
484 return child;
485 }
486
487 static MTPObject *usb_mtp_object_lookup_name(MTPObject *parent,
488 const char *name, int len)
489 {
490 MTPObject *iter;
491
492 if (len == -1) {
493 len = strlen(name);
494 }
495
496 QLIST_FOREACH(iter, &parent->children, list) {
497 if (strncmp(iter->name, name, len) == 0) {
498 return iter;
499 }
500 }
501
502 return NULL;
503 }
504
505 static MTPObject *usb_mtp_object_lookup_id(MTPState *s, int64_t id)
506 {
507 MTPObject *iter;
508
509 QTAILQ_FOREACH(iter, &s->objects, next) {
510 if (iter->watchid == id) {
511 return iter;
512 }
513 }
514
515 return NULL;
516 }
517
518 static void file_monitor_event(int64_t id,
519 QFileMonitorEvent ev,
520 const char *name,
521 void *opaque)
522 {
523 MTPState *s = opaque;
524 MTPObject *parent = usb_mtp_object_lookup_id(s, id);
525 MTPMonEntry *entry = NULL;
526 MTPObject *o;
527
528 if (!parent) {
529 return;
530 }
531
532 switch (ev) {
533 case QFILE_MONITOR_EVENT_CREATED:
534 if (usb_mtp_object_lookup_name(parent, name, -1)) {
535 /* Duplicate create event */
536 return;
537 }
538 entry = g_new0(MTPMonEntry, 1);
539 entry->handle = s->next_handle;
540 entry->event = EVT_OBJ_ADDED;
541 o = usb_mtp_add_child(s, parent, name);
542 if (!o) {
543 g_free(entry);
544 return;
545 }
546 trace_usb_mtp_file_monitor_event(s->dev.addr, name, "Obj Added");
547 break;
548
549 case QFILE_MONITOR_EVENT_DELETED:
550 /*
551 * The kernel issues a IN_IGNORED event
552 * when a dir containing a watchpoint is
553 * deleted, so we don't have to delete the
554 * watchpoint
555 */
556 o = usb_mtp_object_lookup_name(parent, name, -1);
557 if (!o) {
558 return;
559 }
560 entry = g_new0(MTPMonEntry, 1);
561 entry->handle = o->handle;
562 entry->event = EVT_OBJ_REMOVED;
563 trace_usb_mtp_file_monitor_event(s->dev.addr, o->path, "Obj Deleted");
564 usb_mtp_object_free(s, o);
565 break;
566
567 case QFILE_MONITOR_EVENT_MODIFIED:
568 o = usb_mtp_object_lookup_name(parent, name, -1);
569 if (!o) {
570 return;
571 }
572 entry = g_new0(MTPMonEntry, 1);
573 entry->handle = o->handle;
574 entry->event = EVT_OBJ_INFO_CHANGED;
575 trace_usb_mtp_file_monitor_event(s->dev.addr, o->path, "Obj Modified");
576 break;
577
578 case QFILE_MONITOR_EVENT_IGNORED:
579 trace_usb_mtp_file_monitor_event(s->dev.addr, parent->path,
580 "Obj parent dir ignored");
581 break;
582
583 case QFILE_MONITOR_EVENT_ATTRIBUTES:
584 break;
585
586 default:
587 g_assert_not_reached();
588 }
589
590 if (entry) {
591 QTAILQ_INSERT_HEAD(&s->events, entry, next);
592 }
593 }
594
595 static void usb_mtp_file_monitor_cleanup(MTPState *s)
596 {
597 MTPMonEntry *e, *p;
598
599 QTAILQ_FOREACH_SAFE(e, &s->events, next, p) {
600 QTAILQ_REMOVE(&s->events, e, next);
601 g_free(e);
602 }
603
604 qemu_file_monitor_free(s->file_monitor);
605 s->file_monitor = NULL;
606 }
607
608
609 static void usb_mtp_object_readdir(MTPState *s, MTPObject *o)
610 {
611 struct dirent *entry;
612 DIR *dir;
613 int fd;
614 Error *err = NULL;
615
616 if (o->have_children) {
617 return;
618 }
619 o->have_children = true;
620
621 fd = open(o->path, O_DIRECTORY | O_CLOEXEC | O_NOFOLLOW);
622 if (fd < 0) {
623 return;
624 }
625 dir = fdopendir(fd);
626 if (!dir) {
627 close(fd);
628 return;
629 }
630
631 if (s->file_monitor) {
632 int64_t id = qemu_file_monitor_add_watch(s->file_monitor, o->path, NULL,
633 file_monitor_event, s, &err);
634 if (id == -1) {
635 error_reportf_err(err,
636 "usb-mtp: failed to add watch for %s: ",
637 o->path);
638 } else {
639 trace_usb_mtp_file_monitor_event(s->dev.addr, o->path,
640 "Watch Added");
641 o->watchid = id;
642 }
643 }
644
645 while ((entry = readdir(dir)) != NULL) {
646 usb_mtp_add_child(s, o, entry->d_name);
647 }
648 closedir(dir);
649 }
650
651 /* ----------------------------------------------------------------------- */
652
653 static MTPData *usb_mtp_data_alloc(MTPControl *c)
654 {
655 MTPData *data = g_new0(MTPData, 1);
656
657 data->code = c->code;
658 data->trans = c->trans;
659 data->fd = -1;
660 data->first = true;
661 return data;
662 }
663
664 static void usb_mtp_data_free(MTPData *data)
665 {
666 if (data == NULL) {
667 return;
668 }
669 if (data->fd != -1) {
670 close(data->fd);
671 }
672 g_free(data->data);
673 g_free(data);
674 }
675
676 static void usb_mtp_realloc(MTPData *data, uint32_t bytes)
677 {
678 if (data->length + bytes <= data->alloc) {
679 return;
680 }
681 data->alloc = (data->length + bytes + 0xff) & ~0xff;
682 data->data = g_realloc(data->data, data->alloc);
683 }
684
685 static void usb_mtp_add_u8(MTPData *data, uint8_t val)
686 {
687 usb_mtp_realloc(data, 1);
688 data->data[data->length++] = val;
689 }
690
691 static void usb_mtp_add_u16(MTPData *data, uint16_t val)
692 {
693 usb_mtp_realloc(data, 2);
694 data->data[data->length++] = (val >> 0) & 0xff;
695 data->data[data->length++] = (val >> 8) & 0xff;
696 }
697
698 static void usb_mtp_add_u32(MTPData *data, uint32_t val)
699 {
700 usb_mtp_realloc(data, 4);
701 data->data[data->length++] = (val >> 0) & 0xff;
702 data->data[data->length++] = (val >> 8) & 0xff;
703 data->data[data->length++] = (val >> 16) & 0xff;
704 data->data[data->length++] = (val >> 24) & 0xff;
705 }
706
707 static void usb_mtp_add_u64(MTPData *data, uint64_t val)
708 {
709 usb_mtp_realloc(data, 8);
710 data->data[data->length++] = (val >> 0) & 0xff;
711 data->data[data->length++] = (val >> 8) & 0xff;
712 data->data[data->length++] = (val >> 16) & 0xff;
713 data->data[data->length++] = (val >> 24) & 0xff;
714 data->data[data->length++] = (val >> 32) & 0xff;
715 data->data[data->length++] = (val >> 40) & 0xff;
716 data->data[data->length++] = (val >> 48) & 0xff;
717 data->data[data->length++] = (val >> 56) & 0xff;
718 }
719
720 static void usb_mtp_add_u16_array(MTPData *data, uint32_t len,
721 const uint16_t *vals)
722 {
723 int i;
724
725 usb_mtp_add_u32(data, len);
726 for (i = 0; i < len; i++) {
727 usb_mtp_add_u16(data, vals[i]);
728 }
729 }
730
731 static void usb_mtp_add_u32_array(MTPData *data, uint32_t len,
732 const uint32_t *vals)
733 {
734 int i;
735
736 usb_mtp_add_u32(data, len);
737 for (i = 0; i < len; i++) {
738 usb_mtp_add_u32(data, vals[i]);
739 }
740 }
741
742 static void usb_mtp_add_wstr(MTPData *data, const wchar_t *str)
743 {
744 uint32_t len = wcslen(str);
745 int i;
746
747 if (len > 0) {
748 len++; /* include terminating L'\0' */
749 }
750
751 usb_mtp_add_u8(data, len);
752 for (i = 0; i < len; i++) {
753 usb_mtp_add_u16(data, str[i]);
754 }
755 }
756
757 static void usb_mtp_add_str(MTPData *data, const char *str)
758 {
759 uint32_t len = strlen(str)+1;
760 wchar_t *wstr = g_new(wchar_t, len);
761 size_t ret;
762
763 ret = mbstowcs(wstr, str, len);
764 if (ret == -1) {
765 usb_mtp_add_wstr(data, L"Oops");
766 } else {
767 usb_mtp_add_wstr(data, wstr);
768 }
769
770 g_free(wstr);
771 }
772
773 static void usb_mtp_add_time(MTPData *data, time_t time)
774 {
775 g_autoptr(GDateTime) then = g_date_time_new_from_unix_utc(time);
776 g_autofree char *thenstr = g_date_time_format(then, "%Y%m%dT%H%M%S");
777 usb_mtp_add_str(data, thenstr);
778 }
779
780 /* ----------------------------------------------------------------------- */
781
782 static void usb_mtp_queue_result(MTPState *s, uint16_t code, uint32_t trans,
783 int argc, uint32_t arg0, uint32_t arg1,
784 uint32_t arg2)
785 {
786 MTPControl *c = g_new0(MTPControl, 1);
787
788 c->code = code;
789 c->trans = trans;
790 c->argc = argc;
791 if (argc > 0) {
792 c->argv[0] = arg0;
793 }
794 if (argc > 1) {
795 c->argv[1] = arg1;
796 }
797 if (argc > 2) {
798 c->argv[2] = arg2;
799 }
800
801 assert(s->result == NULL);
802 s->result = c;
803 }
804
805 /* ----------------------------------------------------------------------- */
806
807 static MTPData *usb_mtp_get_device_info(MTPState *s, MTPControl *c)
808 {
809 static const uint16_t ops[] = {
810 CMD_GET_DEVICE_INFO,
811 CMD_OPEN_SESSION,
812 CMD_CLOSE_SESSION,
813 CMD_GET_STORAGE_IDS,
814 CMD_GET_STORAGE_INFO,
815 CMD_GET_NUM_OBJECTS,
816 CMD_GET_OBJECT_HANDLES,
817 CMD_GET_OBJECT_INFO,
818 CMD_DELETE_OBJECT,
819 CMD_SEND_OBJECT_INFO,
820 CMD_SEND_OBJECT,
821 CMD_GET_OBJECT,
822 CMD_GET_PARTIAL_OBJECT,
823 CMD_GET_OBJECT_PROPS_SUPPORTED,
824 CMD_GET_OBJECT_PROP_DESC,
825 CMD_GET_OBJECT_PROP_VALUE,
826 };
827 static const uint16_t fmt[] = {
828 FMT_UNDEFINED_OBJECT,
829 FMT_ASSOCIATION,
830 };
831 MTPData *d = usb_mtp_data_alloc(c);
832
833 trace_usb_mtp_op_get_device_info(s->dev.addr);
834
835 usb_mtp_add_u16(d, 100);
836 usb_mtp_add_u32(d, 0x00000006);
837 usb_mtp_add_u16(d, 0x0064);
838 usb_mtp_add_wstr(d, L"");
839 usb_mtp_add_u16(d, 0x0000);
840
841 usb_mtp_add_u16_array(d, ARRAY_SIZE(ops), ops);
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, 0, NULL);
845 usb_mtp_add_u16_array(d, ARRAY_SIZE(fmt), fmt);
846
847 usb_mtp_add_wstr(d, L"" MTP_MANUFACTURER);
848 usb_mtp_add_wstr(d, L"" MTP_PRODUCT);
849 usb_mtp_add_wstr(d, L"0.1");
850 usb_mtp_add_wstr(d, L"0123456789abcdef0123456789abcdef");
851
852 return d;
853 }
854
855 static MTPData *usb_mtp_get_storage_ids(MTPState *s, MTPControl *c)
856 {
857 static const uint32_t ids[] = {
858 QEMU_STORAGE_ID,
859 };
860 MTPData *d = usb_mtp_data_alloc(c);
861
862 trace_usb_mtp_op_get_storage_ids(s->dev.addr);
863
864 usb_mtp_add_u32_array(d, ARRAY_SIZE(ids), ids);
865
866 return d;
867 }
868
869 static MTPData *usb_mtp_get_storage_info(MTPState *s, MTPControl *c)
870 {
871 MTPData *d = usb_mtp_data_alloc(c);
872 struct statvfs buf;
873 int rc;
874
875 trace_usb_mtp_op_get_storage_info(s->dev.addr);
876
877 if (FLAG_SET(s, MTP_FLAG_WRITABLE)) {
878 usb_mtp_add_u16(d, 0x0003);
879 usb_mtp_add_u16(d, 0x0002);
880 usb_mtp_add_u16(d, 0x0000);
881 } else {
882 usb_mtp_add_u16(d, 0x0001);
883 usb_mtp_add_u16(d, 0x0002);
884 usb_mtp_add_u16(d, 0x0001);
885 }
886
887 rc = statvfs(s->root, &buf);
888 if (rc == 0) {
889 usb_mtp_add_u64(d, (uint64_t)buf.f_frsize * buf.f_blocks);
890 usb_mtp_add_u64(d, (uint64_t)buf.f_bavail * buf.f_blocks);
891 usb_mtp_add_u32(d, buf.f_ffree);
892 } else {
893 usb_mtp_add_u64(d, 0xffffffff);
894 usb_mtp_add_u64(d, 0xffffffff);
895 usb_mtp_add_u32(d, 0xffffffff);
896 }
897
898 usb_mtp_add_str(d, s->desc);
899 usb_mtp_add_wstr(d, L"123456789abcdef");
900 return d;
901 }
902
903 static MTPData *usb_mtp_get_object_handles(MTPState *s, MTPControl *c,
904 MTPObject *o)
905 {
906 MTPData *d = usb_mtp_data_alloc(c);
907 uint32_t i = 0;
908 g_autofree uint32_t *handles = g_new(uint32_t, o->nchildren);
909 MTPObject *iter;
910
911 trace_usb_mtp_op_get_object_handles(s->dev.addr, o->handle, o->path);
912
913 QLIST_FOREACH(iter, &o->children, list) {
914 handles[i++] = iter->handle;
915 }
916 assert(i == o->nchildren);
917 usb_mtp_add_u32_array(d, o->nchildren, handles);
918
919 return d;
920 }
921
922 static MTPData *usb_mtp_get_object_info(MTPState *s, MTPControl *c,
923 MTPObject *o)
924 {
925 MTPData *d = usb_mtp_data_alloc(c);
926
927 trace_usb_mtp_op_get_object_info(s->dev.addr, o->handle, o->path);
928
929 usb_mtp_add_u32(d, QEMU_STORAGE_ID);
930 usb_mtp_add_u16(d, o->format);
931 usb_mtp_add_u16(d, 0);
932
933 if (o->stat.st_size > 0xFFFFFFFF) {
934 usb_mtp_add_u32(d, 0xFFFFFFFF);
935 } else {
936 usb_mtp_add_u32(d, o->stat.st_size);
937 }
938
939 usb_mtp_add_u16(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 usb_mtp_add_u32(d, 0);
945 usb_mtp_add_u32(d, 0);
946
947 if (o->parent) {
948 usb_mtp_add_u32(d, o->parent->handle);
949 } else {
950 usb_mtp_add_u32(d, 0);
951 }
952 if (o->format == FMT_ASSOCIATION) {
953 usb_mtp_add_u16(d, 0x0001);
954 usb_mtp_add_u32(d, 0x00000001);
955 usb_mtp_add_u32(d, 0);
956 } else {
957 usb_mtp_add_u16(d, 0);
958 usb_mtp_add_u32(d, 0);
959 usb_mtp_add_u32(d, 0);
960 }
961
962 usb_mtp_add_str(d, o->name);
963 usb_mtp_add_time(d, o->stat.st_ctime);
964 usb_mtp_add_time(d, o->stat.st_mtime);
965 usb_mtp_add_wstr(d, L"");
966
967 return d;
968 }
969
970 static MTPData *usb_mtp_get_object(MTPState *s, MTPControl *c,
971 MTPObject *o)
972 {
973 MTPData *d = usb_mtp_data_alloc(c);
974
975 trace_usb_mtp_op_get_object(s->dev.addr, o->handle, o->path);
976
977 d->fd = open(o->path, O_RDONLY | O_CLOEXEC | O_NOFOLLOW);
978 if (d->fd == -1) {
979 usb_mtp_data_free(d);
980 return NULL;
981 }
982 d->length = o->stat.st_size;
983 d->alloc = 512;
984 d->data = g_malloc(d->alloc);
985 return d;
986 }
987
988 static MTPData *usb_mtp_get_partial_object(MTPState *s, MTPControl *c,
989 MTPObject *o)
990 {
991 MTPData *d;
992 off_t offset;
993
994 if (c->argc <= 2) {
995 return NULL;
996 }
997 trace_usb_mtp_op_get_partial_object(s->dev.addr, o->handle, o->path,
998 c->argv[1], c->argv[2]);
999
1000 d = usb_mtp_data_alloc(c);
1001 d->fd = open(o->path, O_RDONLY | O_CLOEXEC | O_NOFOLLOW);
1002 if (d->fd == -1) {
1003 usb_mtp_data_free(d);
1004 return NULL;
1005 }
1006
1007 offset = c->argv[1];
1008 if (offset > o->stat.st_size) {
1009 offset = o->stat.st_size;
1010 }
1011 if (lseek(d->fd, offset, SEEK_SET) < 0) {
1012 usb_mtp_data_free(d);
1013 return NULL;
1014 }
1015
1016 d->length = c->argv[2];
1017 if (d->length > o->stat.st_size - offset) {
1018 d->length = o->stat.st_size - offset;
1019 }
1020
1021 return d;
1022 }
1023
1024 static MTPData *usb_mtp_get_object_props_supported(MTPState *s, MTPControl *c)
1025 {
1026 static const uint16_t props[] = {
1027 PROP_STORAGE_ID,
1028 PROP_OBJECT_FORMAT,
1029 PROP_OBJECT_COMPRESSED_SIZE,
1030 PROP_PARENT_OBJECT,
1031 PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER,
1032 PROP_NAME,
1033 };
1034 MTPData *d = usb_mtp_data_alloc(c);
1035 usb_mtp_add_u16_array(d, ARRAY_SIZE(props), props);
1036
1037 return d;
1038 }
1039
1040 static MTPData *usb_mtp_get_object_prop_desc(MTPState *s, MTPControl *c)
1041 {
1042 MTPData *d = usb_mtp_data_alloc(c);
1043 switch (c->argv[0]) {
1044 case PROP_STORAGE_ID:
1045 usb_mtp_add_u16(d, PROP_STORAGE_ID);
1046 usb_mtp_add_u16(d, DATA_TYPE_UINT32);
1047 usb_mtp_add_u8(d, 0x00);
1048 usb_mtp_add_u32(d, 0x00000000);
1049 usb_mtp_add_u32(d, 0x00000000);
1050 usb_mtp_add_u8(d, 0x00);
1051 break;
1052 case PROP_OBJECT_FORMAT:
1053 usb_mtp_add_u16(d, PROP_OBJECT_FORMAT);
1054 usb_mtp_add_u16(d, DATA_TYPE_UINT16);
1055 usb_mtp_add_u8(d, 0x00);
1056 usb_mtp_add_u16(d, 0x0000);
1057 usb_mtp_add_u32(d, 0x00000000);
1058 usb_mtp_add_u8(d, 0x00);
1059 break;
1060 case PROP_OBJECT_COMPRESSED_SIZE:
1061 usb_mtp_add_u16(d, PROP_OBJECT_COMPRESSED_SIZE);
1062 usb_mtp_add_u16(d, DATA_TYPE_UINT64);
1063 usb_mtp_add_u8(d, 0x00);
1064 usb_mtp_add_u64(d, 0x0000000000000000);
1065 usb_mtp_add_u32(d, 0x00000000);
1066 usb_mtp_add_u8(d, 0x00);
1067 break;
1068 case PROP_PARENT_OBJECT:
1069 usb_mtp_add_u16(d, PROP_PARENT_OBJECT);
1070 usb_mtp_add_u16(d, DATA_TYPE_UINT32);
1071 usb_mtp_add_u8(d, 0x00);
1072 usb_mtp_add_u32(d, 0x00000000);
1073 usb_mtp_add_u32(d, 0x00000000);
1074 usb_mtp_add_u8(d, 0x00);
1075 break;
1076 case PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER:
1077 usb_mtp_add_u16(d, PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER);
1078 usb_mtp_add_u16(d, DATA_TYPE_UINT128);
1079 usb_mtp_add_u8(d, 0x00);
1080 usb_mtp_add_u64(d, 0x0000000000000000);
1081 usb_mtp_add_u64(d, 0x0000000000000000);
1082 usb_mtp_add_u32(d, 0x00000000);
1083 usb_mtp_add_u8(d, 0x00);
1084 break;
1085 case PROP_NAME:
1086 usb_mtp_add_u16(d, PROP_NAME);
1087 usb_mtp_add_u16(d, DATA_TYPE_STRING);
1088 usb_mtp_add_u8(d, 0x00);
1089 usb_mtp_add_u8(d, 0x00);
1090 usb_mtp_add_u32(d, 0x00000000);
1091 usb_mtp_add_u8(d, 0x00);
1092 break;
1093 default:
1094 usb_mtp_data_free(d);
1095 return NULL;
1096 }
1097
1098 return d;
1099 }
1100
1101 static MTPData *usb_mtp_get_object_prop_value(MTPState *s, MTPControl *c,
1102 MTPObject *o)
1103 {
1104 MTPData *d = usb_mtp_data_alloc(c);
1105 switch (c->argv[1]) {
1106 case PROP_STORAGE_ID:
1107 usb_mtp_add_u32(d, QEMU_STORAGE_ID);
1108 break;
1109 case PROP_OBJECT_FORMAT:
1110 usb_mtp_add_u16(d, o->format);
1111 break;
1112 case PROP_OBJECT_COMPRESSED_SIZE:
1113 usb_mtp_add_u64(d, o->stat.st_size);
1114 break;
1115 case PROP_PARENT_OBJECT:
1116 if (o->parent == NULL) {
1117 usb_mtp_add_u32(d, 0x00000000);
1118 } else {
1119 usb_mtp_add_u32(d, o->parent->handle);
1120 }
1121 break;
1122 case PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER:
1123 /* Should be persistent between sessions,
1124 * but using our objedt ID is "good enough"
1125 * for now */
1126 usb_mtp_add_u64(d, 0x0000000000000000);
1127 usb_mtp_add_u64(d, o->handle);
1128 break;
1129 case PROP_NAME:
1130 usb_mtp_add_str(d, o->name);
1131 break;
1132 default:
1133 usb_mtp_data_free(d);
1134 return NULL;
1135 }
1136
1137 return d;
1138 }
1139
1140 /*
1141 * Return values when object @o is deleted.
1142 * If at least one of the deletions succeeded,
1143 * DELETE_SUCCESS is set and if at least one
1144 * of the deletions failed, DELETE_FAILURE is
1145 * set. Both bits being set (DELETE_PARTIAL)
1146 * signifies a RES_PARTIAL_DELETE being sent
1147 * back to the initiator.
1148 */
1149 enum {
1150 DELETE_SUCCESS = (1 << 0),
1151 DELETE_FAILURE = (1 << 1),
1152 DELETE_PARTIAL = (DELETE_FAILURE | DELETE_SUCCESS),
1153 };
1154
1155 static int usb_mtp_deletefn(MTPState *s, MTPObject *o, uint32_t trans)
1156 {
1157 MTPObject *iter, *iter2;
1158 int ret = 0;
1159
1160 /*
1161 * TODO: Add support for Protection Status
1162 */
1163
1164 QLIST_FOREACH(iter, &o->children, list) {
1165 if (iter->format == FMT_ASSOCIATION) {
1166 QLIST_FOREACH(iter2, &iter->children, list) {
1167 ret |= usb_mtp_deletefn(s, iter2, trans);
1168 }
1169 }
1170 }
1171
1172 if (o->format == FMT_UNDEFINED_OBJECT) {
1173 if (remove(o->path)) {
1174 ret |= DELETE_FAILURE;
1175 } else {
1176 usb_mtp_object_free(s, o);
1177 ret |= DELETE_SUCCESS;
1178 }
1179 } else if (o->format == FMT_ASSOCIATION) {
1180 if (rmdir(o->path)) {
1181 ret |= DELETE_FAILURE;
1182 } else {
1183 usb_mtp_object_free(s, o);
1184 ret |= DELETE_SUCCESS;
1185 }
1186 }
1187
1188 return ret;
1189 }
1190
1191 static void usb_mtp_object_delete(MTPState *s, uint32_t handle,
1192 uint32_t format_code, uint32_t trans)
1193 {
1194 MTPObject *o;
1195 int ret;
1196
1197 /* Return error if store is read-only */
1198 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) {
1199 usb_mtp_queue_result(s, RES_STORE_READ_ONLY,
1200 trans, 0, 0, 0, 0);
1201 return;
1202 }
1203
1204 if (format_code != 0) {
1205 usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED,
1206 trans, 0, 0, 0, 0);
1207 return;
1208 }
1209
1210 if (handle == 0xFFFFFFF) {
1211 o = QTAILQ_FIRST(&s->objects);
1212 } else {
1213 o = usb_mtp_object_lookup(s, handle);
1214 }
1215 if (o == NULL) {
1216 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1217 trans, 0, 0, 0, 0);
1218 return;
1219 }
1220
1221 ret = usb_mtp_deletefn(s, o, trans);
1222 switch (ret) {
1223 case DELETE_SUCCESS:
1224 usb_mtp_queue_result(s, RES_OK, trans,
1225 0, 0, 0, 0);
1226 break;
1227 case DELETE_FAILURE:
1228 usb_mtp_queue_result(s, RES_PARTIAL_DELETE,
1229 trans, 0, 0, 0, 0);
1230 break;
1231 case DELETE_PARTIAL:
1232 usb_mtp_queue_result(s, RES_PARTIAL_DELETE,
1233 trans, 0, 0, 0, 0);
1234 break;
1235 default:
1236 g_assert_not_reached();
1237 }
1238
1239 return;
1240 }
1241
1242 static void usb_mtp_command(MTPState *s, MTPControl *c)
1243 {
1244 MTPData *data_in = NULL;
1245 MTPObject *o = NULL;
1246 uint32_t nres = 0, res0 = 0;
1247 Error *err = NULL;
1248
1249 /* sanity checks */
1250 if (c->code >= CMD_CLOSE_SESSION && s->session == 0) {
1251 usb_mtp_queue_result(s, RES_SESSION_NOT_OPEN,
1252 c->trans, 0, 0, 0, 0);
1253 return;
1254 }
1255
1256 /* process commands */
1257 switch (c->code) {
1258 case CMD_GET_DEVICE_INFO:
1259 data_in = usb_mtp_get_device_info(s, c);
1260 break;
1261 case CMD_OPEN_SESSION:
1262 if (s->session) {
1263 usb_mtp_queue_result(s, RES_SESSION_ALREADY_OPEN,
1264 c->trans, 1, s->session, 0, 0);
1265 return;
1266 }
1267 if (c->argv[0] == 0) {
1268 usb_mtp_queue_result(s, RES_INVALID_PARAMETER,
1269 c->trans, 0, 0, 0, 0);
1270 return;
1271 }
1272 trace_usb_mtp_op_open_session(s->dev.addr);
1273 s->session = c->argv[0];
1274 usb_mtp_object_alloc(s, s->next_handle++, NULL, s->root);
1275
1276 s->file_monitor = qemu_file_monitor_new(&err);
1277 if (err) {
1278 error_reportf_err(err,
1279 "usb-mtp: file monitoring init failed: ");
1280 } else {
1281 QTAILQ_INIT(&s->events);
1282 }
1283 break;
1284 case CMD_CLOSE_SESSION:
1285 trace_usb_mtp_op_close_session(s->dev.addr);
1286 s->session = 0;
1287 s->next_handle = 0;
1288 usb_mtp_file_monitor_cleanup(s);
1289 usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects));
1290 assert(QTAILQ_EMPTY(&s->objects));
1291 break;
1292 case CMD_GET_STORAGE_IDS:
1293 data_in = usb_mtp_get_storage_ids(s, c);
1294 break;
1295 case CMD_GET_STORAGE_INFO:
1296 if (c->argv[0] != QEMU_STORAGE_ID &&
1297 c->argv[0] != 0xffffffff) {
1298 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID,
1299 c->trans, 0, 0, 0, 0);
1300 return;
1301 }
1302 data_in = usb_mtp_get_storage_info(s, c);
1303 break;
1304 case CMD_GET_NUM_OBJECTS:
1305 case CMD_GET_OBJECT_HANDLES:
1306 if (c->argv[0] != QEMU_STORAGE_ID &&
1307 c->argv[0] != 0xffffffff) {
1308 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID,
1309 c->trans, 0, 0, 0, 0);
1310 return;
1311 }
1312 if (c->argv[1] != 0x00000000) {
1313 usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED,
1314 c->trans, 0, 0, 0, 0);
1315 return;
1316 }
1317 if (c->argv[2] == 0x00000000 ||
1318 c->argv[2] == 0xffffffff) {
1319 o = QTAILQ_FIRST(&s->objects);
1320 } else {
1321 o = usb_mtp_object_lookup(s, c->argv[2]);
1322 }
1323 if (o == NULL) {
1324 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1325 c->trans, 0, 0, 0, 0);
1326 return;
1327 }
1328 if (o->format != FMT_ASSOCIATION) {
1329 usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT,
1330 c->trans, 0, 0, 0, 0);
1331 return;
1332 }
1333 usb_mtp_object_readdir(s, o);
1334 if (c->code == CMD_GET_NUM_OBJECTS) {
1335 trace_usb_mtp_op_get_num_objects(s->dev.addr, o->handle, o->path);
1336 nres = 1;
1337 res0 = o->nchildren;
1338 } else {
1339 data_in = usb_mtp_get_object_handles(s, c, o);
1340 }
1341 break;
1342 case CMD_GET_OBJECT_INFO:
1343 o = usb_mtp_object_lookup(s, c->argv[0]);
1344 if (o == NULL) {
1345 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1346 c->trans, 0, 0, 0, 0);
1347 return;
1348 }
1349 data_in = usb_mtp_get_object_info(s, c, o);
1350 break;
1351 case CMD_GET_OBJECT:
1352 o = usb_mtp_object_lookup(s, c->argv[0]);
1353 if (o == NULL) {
1354 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1355 c->trans, 0, 0, 0, 0);
1356 return;
1357 }
1358 if (o->format == FMT_ASSOCIATION) {
1359 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1360 c->trans, 0, 0, 0, 0);
1361 return;
1362 }
1363 data_in = usb_mtp_get_object(s, c, o);
1364 if (data_in == NULL) {
1365 usb_mtp_queue_result(s, RES_GENERAL_ERROR,
1366 c->trans, 0, 0, 0, 0);
1367 return;
1368 }
1369 break;
1370 case CMD_DELETE_OBJECT:
1371 usb_mtp_object_delete(s, c->argv[0], c->argv[1], c->trans);
1372 return;
1373 case CMD_GET_PARTIAL_OBJECT:
1374 o = usb_mtp_object_lookup(s, c->argv[0]);
1375 if (o == NULL) {
1376 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1377 c->trans, 0, 0, 0, 0);
1378 return;
1379 }
1380 if (o->format == FMT_ASSOCIATION) {
1381 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1382 c->trans, 0, 0, 0, 0);
1383 return;
1384 }
1385 data_in = usb_mtp_get_partial_object(s, c, o);
1386 if (data_in == NULL) {
1387 usb_mtp_queue_result(s, RES_GENERAL_ERROR,
1388 c->trans, 0, 0, 0, 0);
1389 return;
1390 }
1391 nres = 1;
1392 res0 = data_in->length;
1393 break;
1394 case CMD_SEND_OBJECT_INFO:
1395 /* Return error if store is read-only */
1396 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) {
1397 usb_mtp_queue_result(s, RES_STORE_READ_ONLY,
1398 c->trans, 0, 0, 0, 0);
1399 } else if (c->argv[0] && (c->argv[0] != QEMU_STORAGE_ID)) {
1400 /* First parameter points to storage id or is 0 */
1401 usb_mtp_queue_result(s, RES_STORE_NOT_AVAILABLE, c->trans,
1402 0, 0, 0, 0);
1403 } else if (c->argv[1] && !c->argv[0]) {
1404 /* If second parameter is specified, first must also be specified */
1405 usb_mtp_queue_result(s, RES_DESTINATION_UNSUPPORTED, c->trans,
1406 0, 0, 0, 0);
1407 } else {
1408 uint32_t handle = c->argv[1];
1409 if (handle == 0xFFFFFFFF || handle == 0) {
1410 /* root object */
1411 o = QTAILQ_FIRST(&s->objects);
1412 } else {
1413 o = usb_mtp_object_lookup(s, handle);
1414 }
1415 if (o == NULL) {
1416 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, c->trans,
1417 0, 0, 0, 0);
1418 } else if (o->format != FMT_ASSOCIATION) {
1419 usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT, c->trans,
1420 0, 0, 0, 0);
1421 }
1422 }
1423 if (o) {
1424 s->dataset.parent_handle = o->handle;
1425 }
1426 s->data_out = usb_mtp_data_alloc(c);
1427 return;
1428 case CMD_SEND_OBJECT:
1429 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) {
1430 usb_mtp_queue_result(s, RES_STORE_READ_ONLY,
1431 c->trans, 0, 0, 0, 0);
1432 return;
1433 }
1434 if (!s->write_pending) {
1435 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO,
1436 c->trans, 0, 0, 0, 0);
1437 return;
1438 }
1439 s->data_out = usb_mtp_data_alloc(c);
1440 return;
1441 case CMD_GET_OBJECT_PROPS_SUPPORTED:
1442 if (c->argv[0] != FMT_UNDEFINED_OBJECT &&
1443 c->argv[0] != FMT_ASSOCIATION) {
1444 usb_mtp_queue_result(s, RES_INVALID_OBJECT_FORMAT_CODE,
1445 c->trans, 0, 0, 0, 0);
1446 return;
1447 }
1448 data_in = usb_mtp_get_object_props_supported(s, c);
1449 break;
1450 case CMD_GET_OBJECT_PROP_DESC:
1451 if (c->argv[1] != FMT_UNDEFINED_OBJECT &&
1452 c->argv[1] != FMT_ASSOCIATION) {
1453 usb_mtp_queue_result(s, RES_INVALID_OBJECT_FORMAT_CODE,
1454 c->trans, 0, 0, 0, 0);
1455 return;
1456 }
1457 data_in = usb_mtp_get_object_prop_desc(s, c);
1458 if (data_in == NULL) {
1459 usb_mtp_queue_result(s, RES_INVALID_OBJECT_PROP_CODE,
1460 c->trans, 0, 0, 0, 0);
1461 return;
1462 }
1463 break;
1464 case CMD_GET_OBJECT_PROP_VALUE:
1465 o = usb_mtp_object_lookup(s, c->argv[0]);
1466 if (o == NULL) {
1467 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1468 c->trans, 0, 0, 0, 0);
1469 return;
1470 }
1471 data_in = usb_mtp_get_object_prop_value(s, c, o);
1472 if (data_in == NULL) {
1473 usb_mtp_queue_result(s, RES_INVALID_OBJECT_PROP_CODE,
1474 c->trans, 0, 0, 0, 0);
1475 return;
1476 }
1477 break;
1478 default:
1479 trace_usb_mtp_op_unknown(s->dev.addr, c->code);
1480 usb_mtp_queue_result(s, RES_OPERATION_NOT_SUPPORTED,
1481 c->trans, 0, 0, 0, 0);
1482 return;
1483 }
1484
1485 /* return results on success */
1486 if (data_in) {
1487 assert(s->data_in == NULL);
1488 s->data_in = data_in;
1489 }
1490 usb_mtp_queue_result(s, RES_OK, c->trans, nres, res0, 0, 0);
1491 }
1492
1493 /* ----------------------------------------------------------------------- */
1494
1495 static void usb_mtp_handle_reset(USBDevice *dev)
1496 {
1497 MTPState *s = USB_MTP(dev);
1498
1499 trace_usb_mtp_reset(s->dev.addr);
1500
1501 usb_mtp_file_monitor_cleanup(s);
1502 usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects));
1503 s->session = 0;
1504 usb_mtp_data_free(s->data_in);
1505 s->data_in = NULL;
1506 usb_mtp_data_free(s->data_out);
1507 s->data_out = NULL;
1508 g_free(s->result);
1509 s->result = NULL;
1510 }
1511
1512 static void usb_mtp_handle_control(USBDevice *dev, USBPacket *p,
1513 int request, int value, int index,
1514 int length, uint8_t *data)
1515 {
1516 int ret;
1517 MTPState *s = USB_MTP(dev);
1518 uint16_t *event = (uint16_t *)data;
1519
1520 switch (request) {
1521 case ClassInterfaceOutRequest | 0x64:
1522 if (*event == EVT_CANCEL_TRANSACTION) {
1523 g_free(s->result);
1524 s->result = NULL;
1525 usb_mtp_data_free(s->data_in);
1526 s->data_in = NULL;
1527 if (s->write_pending) {
1528 g_free(s->dataset.filename);
1529 s->write_pending = false;
1530 s->dataset.size = 0;
1531 }
1532 usb_mtp_data_free(s->data_out);
1533 s->data_out = NULL;
1534 } else {
1535 p->status = USB_RET_STALL;
1536 }
1537 break;
1538 default:
1539 ret = usb_desc_handle_control(dev, p, request,
1540 value, index, length, data);
1541 if (ret >= 0) {
1542 return;
1543 }
1544 }
1545
1546 trace_usb_mtp_stall(dev->addr, "unknown control request");
1547 }
1548
1549 static void usb_mtp_cancel_packet(USBDevice *dev, USBPacket *p)
1550 {
1551 /* we don't use async packets, so this should never be called */
1552 fprintf(stderr, "%s\n", __func__);
1553 }
1554
1555 static char *utf16_to_str(uint8_t len, uint8_t *str16)
1556 {
1557 wchar_t *wstr = g_new0(wchar_t, len + 1);
1558 int count, dlen;
1559 char *dest;
1560
1561 for (count = 0; count < len; count++) {
1562 /* FIXME: not working for surrogate pairs */
1563 wstr[count] = lduw_le_p(str16 + (count * 2));
1564 }
1565 wstr[count] = 0;
1566
1567 dlen = wcstombs(NULL, wstr, 0) + 1;
1568 dest = g_malloc(dlen);
1569 wcstombs(dest, wstr, dlen);
1570 g_free(wstr);
1571 return dest;
1572 }
1573
1574 /* Wrapper around write, returns 0 on failure */
1575 static uint64_t write_retry(int fd, void *buf, uint64_t size, off_t offset)
1576 {
1577 uint64_t ret = 0;
1578
1579 if (lseek(fd, offset, SEEK_SET) < 0) {
1580 goto done;
1581 }
1582
1583 ret = qemu_write_full(fd, buf, size);
1584
1585 done:
1586 return ret;
1587 }
1588
1589 static int usb_mtp_update_object(MTPObject *parent, char *name)
1590 {
1591 int ret = 0;
1592
1593 MTPObject *o =
1594 usb_mtp_object_lookup_name(parent, name, strlen(name));
1595
1596 if (o) {
1597 ret = lstat(o->path, &o->stat);
1598 }
1599
1600 return ret;
1601 }
1602
1603 static void usb_mtp_write_data(MTPState *s, uint32_t handle)
1604 {
1605 MTPData *d = s->data_out;
1606 MTPObject *parent =
1607 usb_mtp_object_lookup(s, s->dataset.parent_handle);
1608 char *path = NULL;
1609 uint64_t rc;
1610 mode_t mask = 0644;
1611 int ret = 0;
1612
1613 assert(d != NULL);
1614
1615 switch (d->write_status) {
1616 case WRITE_START:
1617 if (!parent || !s->write_pending) {
1618 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, d->trans,
1619 0, 0, 0, 0);
1620 return;
1621 }
1622
1623 if (s->dataset.filename) {
1624 path = g_strdup_printf("%s/%s", parent->path, s->dataset.filename);
1625 if (s->dataset.format == FMT_ASSOCIATION) {
1626 ret = mkdir(path, mask);
1627 if (!ret) {
1628 usb_mtp_queue_result(s, RES_OK, d->trans, 3,
1629 QEMU_STORAGE_ID,
1630 s->dataset.parent_handle,
1631 handle);
1632 goto close;
1633 }
1634 goto done;
1635 }
1636
1637 d->fd = open(path, O_CREAT | O_WRONLY |
1638 O_CLOEXEC | O_NOFOLLOW, mask);
1639 if (d->fd == -1) {
1640 ret = 1;
1641 goto done;
1642 }
1643
1644 /* Return success if initiator sent 0 sized data */
1645 if (!s->dataset.size) {
1646 goto done;
1647 }
1648 if (d->length != MTP_WRITE_BUF_SZ && !d->pending) {
1649 d->write_status = WRITE_END;
1650 }
1651 }
1652 /* fall through */
1653 case WRITE_CONTINUE:
1654 case WRITE_END:
1655 rc = write_retry(d->fd, d->data, d->data_offset,
1656 d->offset - d->data_offset);
1657 if (rc != d->data_offset) {
1658 ret = 1;
1659 goto done;
1660 }
1661 if (d->write_status != WRITE_END) {
1662 g_free(path);
1663 return;
1664 } else {
1665 /*
1666 * Return an incomplete transfer if file size doesn't match
1667 * for < 4G file or if lstat fails which will result in an incorrect
1668 * file size
1669 */
1670 if ((s->dataset.size != 0xFFFFFFFF &&
1671 d->offset != s->dataset.size) ||
1672 usb_mtp_update_object(parent, s->dataset.filename)) {
1673 usb_mtp_queue_result(s, RES_INCOMPLETE_TRANSFER, d->trans,
1674 0, 0, 0, 0);
1675 goto close;
1676 }
1677 }
1678 }
1679
1680 done:
1681 if (ret) {
1682 usb_mtp_queue_result(s, RES_STORE_FULL, d->trans,
1683 0, 0, 0, 0);
1684 } else {
1685 usb_mtp_queue_result(s, RES_OK, d->trans,
1686 0, 0, 0, 0);
1687 }
1688 close:
1689 /*
1690 * The write dataset is kept around and freed only
1691 * on success or if another write request comes in
1692 */
1693 if (d->fd != -1) {
1694 close(d->fd);
1695 d->fd = -1;
1696 }
1697 g_free(s->dataset.filename);
1698 s->dataset.size = 0;
1699 g_free(path);
1700 s->write_pending = false;
1701 }
1702
1703 static void usb_mtp_write_metadata(MTPState *s, uint64_t dlen)
1704 {
1705 MTPData *d = s->data_out;
1706 ObjectInfo *dataset = (ObjectInfo *)d->data;
1707 char *filename;
1708 MTPObject *o;
1709 MTPObject *p = usb_mtp_object_lookup(s, s->dataset.parent_handle);
1710 uint32_t next_handle = s->next_handle;
1711 size_t filename_chars = dlen - offsetof(ObjectInfo, filename);
1712
1713 /*
1714 * filename is utf-16. We're intentionally doing
1715 * integer division to truncate if malicious guest
1716 * sent an odd number of bytes.
1717 */
1718 filename_chars /= 2;
1719
1720 assert(!s->write_pending);
1721 assert(p != NULL);
1722
1723 filename = utf16_to_str(MIN(dataset->length, filename_chars),
1724 dataset->filename);
1725
1726 if (strchr(filename, '/')) {
1727 usb_mtp_queue_result(s, RES_PARAMETER_NOT_SUPPORTED, d->trans,
1728 0, 0, 0, 0);
1729 g_free(filename);
1730 return;
1731 }
1732
1733 o = usb_mtp_object_lookup_name(p, filename, -1);
1734 if (o != NULL) {
1735 next_handle = o->handle;
1736 }
1737
1738 s->dataset.filename = filename;
1739 s->dataset.format = dataset->format;
1740 s->dataset.size = dataset->size;
1741 s->write_pending = true;
1742
1743 if (s->dataset.format == FMT_ASSOCIATION) {
1744 usb_mtp_write_data(s, next_handle);
1745 } else {
1746 usb_mtp_queue_result(s, RES_OK, d->trans, 3, QEMU_STORAGE_ID,
1747 s->dataset.parent_handle, next_handle);
1748 }
1749 }
1750
1751 static void usb_mtp_get_data(MTPState *s, mtp_container *container,
1752 USBPacket *p)
1753 {
1754 MTPData *d = s->data_out;
1755 uint64_t dlen;
1756 uint32_t data_len = p->iov.size;
1757 uint64_t total_len;
1758
1759 if (!d) {
1760 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, 0,
1761 0, 0, 0, 0);
1762 return;
1763 }
1764 if (d->first) {
1765 /* Total length of incoming data */
1766 total_len = cpu_to_le32(container->length) - sizeof(mtp_container);
1767 /* Length of data in this packet */
1768 data_len -= sizeof(mtp_container);
1769 if (total_len < MTP_WRITE_BUF_SZ) {
1770 usb_mtp_realloc(d, total_len);
1771 d->length += total_len;
1772 } else {
1773 usb_mtp_realloc(d, MTP_WRITE_BUF_SZ - sizeof(mtp_container));
1774 d->length += MTP_WRITE_BUF_SZ - sizeof(mtp_container);
1775 }
1776 d->offset = 0;
1777 d->first = false;
1778 d->pending = false;
1779 d->data_offset = 0;
1780 d->write_status = WRITE_START;
1781 }
1782
1783 if (d->pending) {
1784 memset(d->data, 0, d->length);
1785 if (d->length != MTP_WRITE_BUF_SZ) {
1786 usb_mtp_realloc(d, MTP_WRITE_BUF_SZ - d->length);
1787 d->length += (MTP_WRITE_BUF_SZ - d->length);
1788 }
1789 d->pending = false;
1790 d->write_status = WRITE_CONTINUE;
1791 d->data_offset = 0;
1792 }
1793
1794 if (d->length - d->data_offset > data_len) {
1795 dlen = data_len;
1796 } else {
1797 dlen = d->length - d->data_offset;
1798 }
1799
1800 switch (d->code) {
1801 case CMD_SEND_OBJECT_INFO:
1802 usb_packet_copy(p, d->data + d->data_offset, dlen);
1803 d->offset += dlen;
1804 d->data_offset += dlen;
1805 if (d->data_offset == d->length) {
1806 /* The operation might have already failed */
1807 if (!s->result) {
1808 usb_mtp_write_metadata(s, dlen);
1809 }
1810 usb_mtp_data_free(s->data_out);
1811 s->data_out = NULL;
1812 return;
1813 }
1814 break;
1815 case CMD_SEND_OBJECT:
1816 usb_packet_copy(p, d->data + d->data_offset, dlen);
1817 d->offset += dlen;
1818 d->data_offset += dlen;
1819 if ((p->iov.size % 64) || !p->iov.size) {
1820 assert((s->dataset.size == 0xFFFFFFFF) ||
1821 (s->dataset.size == d->offset));
1822
1823 if (d->length == MTP_WRITE_BUF_SZ) {
1824 d->write_status = WRITE_END;
1825 } else {
1826 d->write_status = WRITE_START;
1827 }
1828 usb_mtp_write_data(s, 0);
1829 usb_mtp_data_free(s->data_out);
1830 s->data_out = NULL;
1831 return;
1832 }
1833 if (d->data_offset == d->length) {
1834 d->pending = true;
1835 usb_mtp_write_data(s, 0);
1836 }
1837 break;
1838 default:
1839 p->status = USB_RET_STALL;
1840 return;
1841 }
1842 }
1843
1844 static void usb_mtp_handle_data(USBDevice *dev, USBPacket *p)
1845 {
1846 MTPState *s = USB_MTP(dev);
1847 MTPControl cmd;
1848 mtp_container container;
1849 uint32_t params[5];
1850 uint16_t container_type;
1851 int i, rc;
1852
1853 switch (p->ep->nr) {
1854 case EP_DATA_IN:
1855 if (s->data_out != NULL) {
1856 /* guest bug */
1857 trace_usb_mtp_stall(s->dev.addr, "awaiting data-out");
1858 p->status = USB_RET_STALL;
1859 return;
1860 }
1861 if (p->iov.size < sizeof(container)) {
1862 trace_usb_mtp_stall(s->dev.addr, "packet too small");
1863 p->status = USB_RET_STALL;
1864 return;
1865 }
1866 if (s->data_in != NULL) {
1867 MTPData *d = s->data_in;
1868 uint64_t dlen = d->length - d->offset;
1869 if (d->first) {
1870 trace_usb_mtp_data_in(s->dev.addr, d->trans, d->length);
1871 if (d->length + sizeof(container) > 0xFFFFFFFF) {
1872 container.length = cpu_to_le32(0xFFFFFFFF);
1873 } else {
1874 container.length =
1875 cpu_to_le32(d->length + sizeof(container));
1876 }
1877 container.type = cpu_to_le16(TYPE_DATA);
1878 container.code = cpu_to_le16(d->code);
1879 container.trans = cpu_to_le32(d->trans);
1880 usb_packet_copy(p, &container, sizeof(container));
1881 d->first = false;
1882 if (dlen > p->iov.size - sizeof(container)) {
1883 dlen = p->iov.size - sizeof(container);
1884 }
1885 } else {
1886 if (dlen > p->iov.size) {
1887 dlen = p->iov.size;
1888 }
1889 }
1890 if (d->fd == -1) {
1891 usb_packet_copy(p, d->data + d->offset, dlen);
1892 } else {
1893 if (d->alloc < p->iov.size) {
1894 d->alloc = p->iov.size;
1895 d->data = g_realloc(d->data, d->alloc);
1896 }
1897 rc = read(d->fd, d->data, dlen);
1898 if (rc != dlen) {
1899 memset(d->data, 0, dlen);
1900 s->result->code = RES_INCOMPLETE_TRANSFER;
1901 }
1902 usb_packet_copy(p, d->data, dlen);
1903 }
1904 d->offset += dlen;
1905 if (d->offset == d->length) {
1906 usb_mtp_data_free(s->data_in);
1907 s->data_in = NULL;
1908 }
1909 } else if (s->result != NULL) {
1910 MTPControl *r = s->result;
1911 int length = sizeof(container) + r->argc * sizeof(uint32_t);
1912 if (r->code == RES_OK) {
1913 trace_usb_mtp_success(s->dev.addr, r->trans,
1914 (r->argc > 0) ? r->argv[0] : 0,
1915 (r->argc > 1) ? r->argv[1] : 0);
1916 } else {
1917 trace_usb_mtp_error(s->dev.addr, r->code, r->trans,
1918 (r->argc > 0) ? r->argv[0] : 0,
1919 (r->argc > 1) ? r->argv[1] : 0);
1920 }
1921 container.length = cpu_to_le32(length);
1922 container.type = cpu_to_le16(TYPE_RESPONSE);
1923 container.code = cpu_to_le16(r->code);
1924 container.trans = cpu_to_le32(r->trans);
1925 for (i = 0; i < r->argc; i++) {
1926 params[i] = cpu_to_le32(r->argv[i]);
1927 }
1928 usb_packet_copy(p, &container, sizeof(container));
1929 usb_packet_copy(p, &params, length - sizeof(container));
1930 g_free(s->result);
1931 s->result = NULL;
1932 }
1933 break;
1934 case EP_DATA_OUT:
1935 if (p->iov.size < sizeof(container)) {
1936 trace_usb_mtp_stall(s->dev.addr, "packet too small");
1937 p->status = USB_RET_STALL;
1938 return;
1939 }
1940 if ((s->data_out != NULL) && !s->data_out->first) {
1941 container_type = TYPE_DATA;
1942 } else {
1943 usb_packet_copy(p, &container, sizeof(container));
1944 container_type = le16_to_cpu(container.type);
1945 }
1946 switch (container_type) {
1947 case TYPE_COMMAND:
1948 if (s->data_in || s->data_out || s->result) {
1949 trace_usb_mtp_stall(s->dev.addr, "transaction inflight");
1950 p->status = USB_RET_STALL;
1951 return;
1952 }
1953 cmd.code = le16_to_cpu(container.code);
1954 cmd.argc = (le32_to_cpu(container.length) - sizeof(container))
1955 / sizeof(uint32_t);
1956 cmd.trans = le32_to_cpu(container.trans);
1957 if (cmd.argc > ARRAY_SIZE(cmd.argv)) {
1958 cmd.argc = ARRAY_SIZE(cmd.argv);
1959 }
1960 if (p->iov.size < sizeof(container) + cmd.argc * sizeof(uint32_t)) {
1961 trace_usb_mtp_stall(s->dev.addr, "packet too small");
1962 p->status = USB_RET_STALL;
1963 return;
1964 }
1965 usb_packet_copy(p, &params, cmd.argc * sizeof(uint32_t));
1966 for (i = 0; i < cmd.argc; i++) {
1967 cmd.argv[i] = le32_to_cpu(params[i]);
1968 }
1969 trace_usb_mtp_command(s->dev.addr, cmd.code, cmd.trans,
1970 (cmd.argc > 0) ? cmd.argv[0] : 0,
1971 (cmd.argc > 1) ? cmd.argv[1] : 0,
1972 (cmd.argc > 2) ? cmd.argv[2] : 0,
1973 (cmd.argc > 3) ? cmd.argv[3] : 0,
1974 (cmd.argc > 4) ? cmd.argv[4] : 0);
1975 usb_mtp_command(s, &cmd);
1976 break;
1977 case TYPE_DATA:
1978 /* One of the previous transfers has already errored but the
1979 * responder is still sending data associated with it
1980 */
1981 if (s->result != NULL) {
1982 return;
1983 }
1984 usb_mtp_get_data(s, &container, p);
1985 break;
1986 default:
1987 /* not needed as long as the mtp device is read-only */
1988 p->status = USB_RET_STALL;
1989 return;
1990 }
1991 break;
1992 case EP_EVENT:
1993 if (!QTAILQ_EMPTY(&s->events)) {
1994 struct MTPMonEntry *e = QTAILQ_LAST(&s->events);
1995 uint32_t handle;
1996 int len = sizeof(container) + sizeof(uint32_t);
1997
1998 if (p->iov.size < len) {
1999 trace_usb_mtp_stall(s->dev.addr,
2000 "packet too small to send event");
2001 p->status = USB_RET_STALL;
2002 return;
2003 }
2004
2005 QTAILQ_REMOVE(&s->events, e, next);
2006 container.length = cpu_to_le32(len);
2007 container.type = cpu_to_le32(TYPE_EVENT);
2008 container.code = cpu_to_le16(e->event);
2009 container.trans = 0; /* no trans specific events */
2010 handle = cpu_to_le32(e->handle);
2011 usb_packet_copy(p, &container, sizeof(container));
2012 usb_packet_copy(p, &handle, sizeof(uint32_t));
2013 g_free(e);
2014 return;
2015 }
2016 p->status = USB_RET_NAK;
2017 return;
2018 default:
2019 trace_usb_mtp_stall(s->dev.addr, "invalid endpoint");
2020 p->status = USB_RET_STALL;
2021 return;
2022 }
2023
2024 if (p->actual_length == 0) {
2025 trace_usb_mtp_nak(s->dev.addr, p->ep->nr);
2026 p->status = USB_RET_NAK;
2027 return;
2028 } else {
2029 trace_usb_mtp_xfer(s->dev.addr, p->ep->nr, p->actual_length,
2030 p->iov.size);
2031 return;
2032 }
2033 }
2034
2035 static void usb_mtp_realize(USBDevice *dev, Error **errp)
2036 {
2037 MTPState *s = USB_MTP(dev);
2038
2039 if ((s->root == NULL) || !g_path_is_absolute(s->root)) {
2040 error_setg(errp, "usb-mtp: rootdir must be configured and be an absolute path");
2041 return;
2042 }
2043
2044 if (access(s->root, R_OK) != 0) {
2045 error_setg(errp, "usb-mtp: rootdir does not exist/not readable");
2046 return;
2047 } else if (!s->readonly && access(s->root, W_OK) != 0) {
2048 error_setg(errp, "usb-mtp: rootdir does not have write permissions");
2049 return;
2050 }
2051
2052 /* Mark store as RW */
2053 if (!s->readonly) {
2054 s->flags |= (1 << MTP_FLAG_WRITABLE);
2055 }
2056
2057 if (s->desc == NULL) {
2058 /*
2059 * This does not check if path exists
2060 * but we have the checks above
2061 */
2062 s->desc = g_path_get_basename(s->root);
2063 }
2064
2065 usb_desc_create_serial(dev);
2066 usb_desc_init(dev);
2067 QTAILQ_INIT(&s->objects);
2068
2069 }
2070
2071 static const VMStateDescription vmstate_usb_mtp = {
2072 .name = "usb-mtp",
2073 .unmigratable = 1,
2074 .version_id = 1,
2075 .minimum_version_id = 1,
2076 .fields = (VMStateField[]) {
2077 VMSTATE_USB_DEVICE(dev, MTPState),
2078 VMSTATE_END_OF_LIST()
2079 }
2080 };
2081
2082 static Property mtp_properties[] = {
2083 DEFINE_PROP_STRING("rootdir", MTPState, root),
2084 DEFINE_PROP_STRING("desc", MTPState, desc),
2085 DEFINE_PROP_BOOL("readonly", MTPState, readonly, true),
2086 DEFINE_PROP_END_OF_LIST(),
2087 };
2088
2089 static void usb_mtp_class_initfn(ObjectClass *klass, void *data)
2090 {
2091 DeviceClass *dc = DEVICE_CLASS(klass);
2092 USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
2093
2094 uc->realize = usb_mtp_realize;
2095 uc->product_desc = "QEMU USB MTP";
2096 uc->usb_desc = &desc;
2097 uc->cancel_packet = usb_mtp_cancel_packet;
2098 uc->handle_attach = usb_desc_attach;
2099 uc->handle_reset = usb_mtp_handle_reset;
2100 uc->handle_control = usb_mtp_handle_control;
2101 uc->handle_data = usb_mtp_handle_data;
2102 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
2103 dc->desc = "USB Media Transfer Protocol device";
2104 dc->fw_name = "mtp";
2105 dc->vmsd = &vmstate_usb_mtp;
2106 device_class_set_props(dc, mtp_properties);
2107 }
2108
2109 static TypeInfo mtp_info = {
2110 .name = TYPE_USB_MTP,
2111 .parent = TYPE_USB_DEVICE,
2112 .instance_size = sizeof(MTPState),
2113 .class_init = usb_mtp_class_initfn,
2114 };
2115
2116 static void usb_mtp_register_types(void)
2117 {
2118 type_register_static(&mtp_info);
2119 }
2120
2121 type_init(usb_mtp_register_types)