Merge remote-tracking branch 'remotes/philmd-gitlab/tags/renesas-20201027' 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 char buf[16];
776 struct tm tm;
777
778 gmtime_r(&time, &tm);
779 strftime(buf, sizeof(buf), "%Y%m%dT%H%M%S", &tm);
780 usb_mtp_add_str(data, buf);
781 }
782
783 /* ----------------------------------------------------------------------- */
784
785 static void usb_mtp_queue_result(MTPState *s, uint16_t code, uint32_t trans,
786 int argc, uint32_t arg0, uint32_t arg1,
787 uint32_t arg2)
788 {
789 MTPControl *c = g_new0(MTPControl, 1);
790
791 c->code = code;
792 c->trans = trans;
793 c->argc = argc;
794 if (argc > 0) {
795 c->argv[0] = arg0;
796 }
797 if (argc > 1) {
798 c->argv[1] = arg1;
799 }
800 if (argc > 2) {
801 c->argv[2] = arg2;
802 }
803
804 assert(s->result == NULL);
805 s->result = c;
806 }
807
808 /* ----------------------------------------------------------------------- */
809
810 static MTPData *usb_mtp_get_device_info(MTPState *s, MTPControl *c)
811 {
812 static const uint16_t ops[] = {
813 CMD_GET_DEVICE_INFO,
814 CMD_OPEN_SESSION,
815 CMD_CLOSE_SESSION,
816 CMD_GET_STORAGE_IDS,
817 CMD_GET_STORAGE_INFO,
818 CMD_GET_NUM_OBJECTS,
819 CMD_GET_OBJECT_HANDLES,
820 CMD_GET_OBJECT_INFO,
821 CMD_DELETE_OBJECT,
822 CMD_SEND_OBJECT_INFO,
823 CMD_SEND_OBJECT,
824 CMD_GET_OBJECT,
825 CMD_GET_PARTIAL_OBJECT,
826 CMD_GET_OBJECT_PROPS_SUPPORTED,
827 CMD_GET_OBJECT_PROP_DESC,
828 CMD_GET_OBJECT_PROP_VALUE,
829 };
830 static const uint16_t fmt[] = {
831 FMT_UNDEFINED_OBJECT,
832 FMT_ASSOCIATION,
833 };
834 MTPData *d = usb_mtp_data_alloc(c);
835
836 trace_usb_mtp_op_get_device_info(s->dev.addr);
837
838 usb_mtp_add_u16(d, 100);
839 usb_mtp_add_u32(d, 0x00000006);
840 usb_mtp_add_u16(d, 0x0064);
841 usb_mtp_add_wstr(d, L"");
842 usb_mtp_add_u16(d, 0x0000);
843
844 usb_mtp_add_u16_array(d, ARRAY_SIZE(ops), ops);
845 usb_mtp_add_u16_array(d, 0, NULL);
846 usb_mtp_add_u16_array(d, 0, NULL);
847 usb_mtp_add_u16_array(d, 0, NULL);
848 usb_mtp_add_u16_array(d, ARRAY_SIZE(fmt), fmt);
849
850 usb_mtp_add_wstr(d, L"" MTP_MANUFACTURER);
851 usb_mtp_add_wstr(d, L"" MTP_PRODUCT);
852 usb_mtp_add_wstr(d, L"0.1");
853 usb_mtp_add_wstr(d, L"0123456789abcdef0123456789abcdef");
854
855 return d;
856 }
857
858 static MTPData *usb_mtp_get_storage_ids(MTPState *s, MTPControl *c)
859 {
860 static const uint32_t ids[] = {
861 QEMU_STORAGE_ID,
862 };
863 MTPData *d = usb_mtp_data_alloc(c);
864
865 trace_usb_mtp_op_get_storage_ids(s->dev.addr);
866
867 usb_mtp_add_u32_array(d, ARRAY_SIZE(ids), ids);
868
869 return d;
870 }
871
872 static MTPData *usb_mtp_get_storage_info(MTPState *s, MTPControl *c)
873 {
874 MTPData *d = usb_mtp_data_alloc(c);
875 struct statvfs buf;
876 int rc;
877
878 trace_usb_mtp_op_get_storage_info(s->dev.addr);
879
880 if (FLAG_SET(s, MTP_FLAG_WRITABLE)) {
881 usb_mtp_add_u16(d, 0x0003);
882 usb_mtp_add_u16(d, 0x0002);
883 usb_mtp_add_u16(d, 0x0000);
884 } else {
885 usb_mtp_add_u16(d, 0x0001);
886 usb_mtp_add_u16(d, 0x0002);
887 usb_mtp_add_u16(d, 0x0001);
888 }
889
890 rc = statvfs(s->root, &buf);
891 if (rc == 0) {
892 usb_mtp_add_u64(d, (uint64_t)buf.f_frsize * buf.f_blocks);
893 usb_mtp_add_u64(d, (uint64_t)buf.f_bavail * buf.f_blocks);
894 usb_mtp_add_u32(d, buf.f_ffree);
895 } else {
896 usb_mtp_add_u64(d, 0xffffffff);
897 usb_mtp_add_u64(d, 0xffffffff);
898 usb_mtp_add_u32(d, 0xffffffff);
899 }
900
901 usb_mtp_add_str(d, s->desc);
902 usb_mtp_add_wstr(d, L"123456789abcdef");
903 return d;
904 }
905
906 static MTPData *usb_mtp_get_object_handles(MTPState *s, MTPControl *c,
907 MTPObject *o)
908 {
909 MTPData *d = usb_mtp_data_alloc(c);
910 uint32_t i = 0, handles[o->nchildren];
911 MTPObject *iter;
912
913 trace_usb_mtp_op_get_object_handles(s->dev.addr, o->handle, o->path);
914
915 QLIST_FOREACH(iter, &o->children, list) {
916 handles[i++] = iter->handle;
917 }
918 assert(i == o->nchildren);
919 usb_mtp_add_u32_array(d, o->nchildren, handles);
920
921 return d;
922 }
923
924 static MTPData *usb_mtp_get_object_info(MTPState *s, MTPControl *c,
925 MTPObject *o)
926 {
927 MTPData *d = usb_mtp_data_alloc(c);
928
929 trace_usb_mtp_op_get_object_info(s->dev.addr, o->handle, o->path);
930
931 usb_mtp_add_u32(d, QEMU_STORAGE_ID);
932 usb_mtp_add_u16(d, o->format);
933 usb_mtp_add_u16(d, 0);
934
935 if (o->stat.st_size > 0xFFFFFFFF) {
936 usb_mtp_add_u32(d, 0xFFFFFFFF);
937 } else {
938 usb_mtp_add_u32(d, o->stat.st_size);
939 }
940
941 usb_mtp_add_u16(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 usb_mtp_add_u32(d, 0);
947 usb_mtp_add_u32(d, 0);
948
949 if (o->parent) {
950 usb_mtp_add_u32(d, o->parent->handle);
951 } else {
952 usb_mtp_add_u32(d, 0);
953 }
954 if (o->format == FMT_ASSOCIATION) {
955 usb_mtp_add_u16(d, 0x0001);
956 usb_mtp_add_u32(d, 0x00000001);
957 usb_mtp_add_u32(d, 0);
958 } else {
959 usb_mtp_add_u16(d, 0);
960 usb_mtp_add_u32(d, 0);
961 usb_mtp_add_u32(d, 0);
962 }
963
964 usb_mtp_add_str(d, o->name);
965 usb_mtp_add_time(d, o->stat.st_ctime);
966 usb_mtp_add_time(d, o->stat.st_mtime);
967 usb_mtp_add_wstr(d, L"");
968
969 return d;
970 }
971
972 static MTPData *usb_mtp_get_object(MTPState *s, MTPControl *c,
973 MTPObject *o)
974 {
975 MTPData *d = usb_mtp_data_alloc(c);
976
977 trace_usb_mtp_op_get_object(s->dev.addr, o->handle, o->path);
978
979 d->fd = open(o->path, O_RDONLY | O_CLOEXEC | O_NOFOLLOW);
980 if (d->fd == -1) {
981 usb_mtp_data_free(d);
982 return NULL;
983 }
984 d->length = o->stat.st_size;
985 d->alloc = 512;
986 d->data = g_malloc(d->alloc);
987 return d;
988 }
989
990 static MTPData *usb_mtp_get_partial_object(MTPState *s, MTPControl *c,
991 MTPObject *o)
992 {
993 MTPData *d;
994 off_t offset;
995
996 if (c->argc <= 2) {
997 return NULL;
998 }
999 trace_usb_mtp_op_get_partial_object(s->dev.addr, o->handle, o->path,
1000 c->argv[1], c->argv[2]);
1001
1002 d = usb_mtp_data_alloc(c);
1003 d->fd = open(o->path, O_RDONLY | O_CLOEXEC | O_NOFOLLOW);
1004 if (d->fd == -1) {
1005 usb_mtp_data_free(d);
1006 return NULL;
1007 }
1008
1009 offset = c->argv[1];
1010 if (offset > o->stat.st_size) {
1011 offset = o->stat.st_size;
1012 }
1013 if (lseek(d->fd, offset, SEEK_SET) < 0) {
1014 usb_mtp_data_free(d);
1015 return NULL;
1016 }
1017
1018 d->length = c->argv[2];
1019 if (d->length > o->stat.st_size - offset) {
1020 d->length = o->stat.st_size - offset;
1021 }
1022
1023 return d;
1024 }
1025
1026 static MTPData *usb_mtp_get_object_props_supported(MTPState *s, MTPControl *c)
1027 {
1028 static const uint16_t props[] = {
1029 PROP_STORAGE_ID,
1030 PROP_OBJECT_FORMAT,
1031 PROP_OBJECT_COMPRESSED_SIZE,
1032 PROP_PARENT_OBJECT,
1033 PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER,
1034 PROP_NAME,
1035 };
1036 MTPData *d = usb_mtp_data_alloc(c);
1037 usb_mtp_add_u16_array(d, ARRAY_SIZE(props), props);
1038
1039 return d;
1040 }
1041
1042 static MTPData *usb_mtp_get_object_prop_desc(MTPState *s, MTPControl *c)
1043 {
1044 MTPData *d = usb_mtp_data_alloc(c);
1045 switch (c->argv[0]) {
1046 case PROP_STORAGE_ID:
1047 usb_mtp_add_u16(d, PROP_STORAGE_ID);
1048 usb_mtp_add_u16(d, DATA_TYPE_UINT32);
1049 usb_mtp_add_u8(d, 0x00);
1050 usb_mtp_add_u32(d, 0x00000000);
1051 usb_mtp_add_u32(d, 0x00000000);
1052 usb_mtp_add_u8(d, 0x00);
1053 break;
1054 case PROP_OBJECT_FORMAT:
1055 usb_mtp_add_u16(d, PROP_OBJECT_FORMAT);
1056 usb_mtp_add_u16(d, DATA_TYPE_UINT16);
1057 usb_mtp_add_u8(d, 0x00);
1058 usb_mtp_add_u16(d, 0x0000);
1059 usb_mtp_add_u32(d, 0x00000000);
1060 usb_mtp_add_u8(d, 0x00);
1061 break;
1062 case PROP_OBJECT_COMPRESSED_SIZE:
1063 usb_mtp_add_u16(d, PROP_OBJECT_COMPRESSED_SIZE);
1064 usb_mtp_add_u16(d, DATA_TYPE_UINT64);
1065 usb_mtp_add_u8(d, 0x00);
1066 usb_mtp_add_u64(d, 0x0000000000000000);
1067 usb_mtp_add_u32(d, 0x00000000);
1068 usb_mtp_add_u8(d, 0x00);
1069 break;
1070 case PROP_PARENT_OBJECT:
1071 usb_mtp_add_u16(d, PROP_PARENT_OBJECT);
1072 usb_mtp_add_u16(d, DATA_TYPE_UINT32);
1073 usb_mtp_add_u8(d, 0x00);
1074 usb_mtp_add_u32(d, 0x00000000);
1075 usb_mtp_add_u32(d, 0x00000000);
1076 usb_mtp_add_u8(d, 0x00);
1077 break;
1078 case PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER:
1079 usb_mtp_add_u16(d, PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER);
1080 usb_mtp_add_u16(d, DATA_TYPE_UINT128);
1081 usb_mtp_add_u8(d, 0x00);
1082 usb_mtp_add_u64(d, 0x0000000000000000);
1083 usb_mtp_add_u64(d, 0x0000000000000000);
1084 usb_mtp_add_u32(d, 0x00000000);
1085 usb_mtp_add_u8(d, 0x00);
1086 break;
1087 case PROP_NAME:
1088 usb_mtp_add_u16(d, PROP_NAME);
1089 usb_mtp_add_u16(d, DATA_TYPE_STRING);
1090 usb_mtp_add_u8(d, 0x00);
1091 usb_mtp_add_u8(d, 0x00);
1092 usb_mtp_add_u32(d, 0x00000000);
1093 usb_mtp_add_u8(d, 0x00);
1094 break;
1095 default:
1096 usb_mtp_data_free(d);
1097 return NULL;
1098 }
1099
1100 return d;
1101 }
1102
1103 static MTPData *usb_mtp_get_object_prop_value(MTPState *s, MTPControl *c,
1104 MTPObject *o)
1105 {
1106 MTPData *d = usb_mtp_data_alloc(c);
1107 switch (c->argv[1]) {
1108 case PROP_STORAGE_ID:
1109 usb_mtp_add_u32(d, QEMU_STORAGE_ID);
1110 break;
1111 case PROP_OBJECT_FORMAT:
1112 usb_mtp_add_u16(d, o->format);
1113 break;
1114 case PROP_OBJECT_COMPRESSED_SIZE:
1115 usb_mtp_add_u64(d, o->stat.st_size);
1116 break;
1117 case PROP_PARENT_OBJECT:
1118 if (o->parent == NULL) {
1119 usb_mtp_add_u32(d, 0x00000000);
1120 } else {
1121 usb_mtp_add_u32(d, o->parent->handle);
1122 }
1123 break;
1124 case PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER:
1125 /* Should be persistent between sessions,
1126 * but using our objedt ID is "good enough"
1127 * for now */
1128 usb_mtp_add_u64(d, 0x0000000000000000);
1129 usb_mtp_add_u64(d, o->handle);
1130 break;
1131 case PROP_NAME:
1132 usb_mtp_add_str(d, o->name);
1133 break;
1134 default:
1135 usb_mtp_data_free(d);
1136 return NULL;
1137 }
1138
1139 return d;
1140 }
1141
1142 /*
1143 * Return values when object @o is deleted.
1144 * If at least one of the deletions succeeded,
1145 * DELETE_SUCCESS is set and if at least one
1146 * of the deletions failed, DELETE_FAILURE is
1147 * set. Both bits being set (DELETE_PARTIAL)
1148 * signifies a RES_PARTIAL_DELETE being sent
1149 * back to the initiator.
1150 */
1151 enum {
1152 DELETE_SUCCESS = (1 << 0),
1153 DELETE_FAILURE = (1 << 1),
1154 DELETE_PARTIAL = (DELETE_FAILURE | DELETE_SUCCESS),
1155 };
1156
1157 static int usb_mtp_deletefn(MTPState *s, MTPObject *o, uint32_t trans)
1158 {
1159 MTPObject *iter, *iter2;
1160 int ret = 0;
1161
1162 /*
1163 * TODO: Add support for Protection Status
1164 */
1165
1166 QLIST_FOREACH(iter, &o->children, list) {
1167 if (iter->format == FMT_ASSOCIATION) {
1168 QLIST_FOREACH(iter2, &iter->children, list) {
1169 ret |= usb_mtp_deletefn(s, iter2, trans);
1170 }
1171 }
1172 }
1173
1174 if (o->format == FMT_UNDEFINED_OBJECT) {
1175 if (remove(o->path)) {
1176 ret |= DELETE_FAILURE;
1177 } else {
1178 usb_mtp_object_free(s, o);
1179 ret |= DELETE_SUCCESS;
1180 }
1181 } else if (o->format == FMT_ASSOCIATION) {
1182 if (rmdir(o->path)) {
1183 ret |= DELETE_FAILURE;
1184 } else {
1185 usb_mtp_object_free(s, o);
1186 ret |= DELETE_SUCCESS;
1187 }
1188 }
1189
1190 return ret;
1191 }
1192
1193 static void usb_mtp_object_delete(MTPState *s, uint32_t handle,
1194 uint32_t format_code, uint32_t trans)
1195 {
1196 MTPObject *o;
1197 int ret;
1198
1199 /* Return error if store is read-only */
1200 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) {
1201 usb_mtp_queue_result(s, RES_STORE_READ_ONLY,
1202 trans, 0, 0, 0, 0);
1203 return;
1204 }
1205
1206 if (format_code != 0) {
1207 usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED,
1208 trans, 0, 0, 0, 0);
1209 return;
1210 }
1211
1212 if (handle == 0xFFFFFFF) {
1213 o = QTAILQ_FIRST(&s->objects);
1214 } else {
1215 o = usb_mtp_object_lookup(s, handle);
1216 }
1217 if (o == NULL) {
1218 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1219 trans, 0, 0, 0, 0);
1220 return;
1221 }
1222
1223 ret = usb_mtp_deletefn(s, o, trans);
1224 switch (ret) {
1225 case DELETE_SUCCESS:
1226 usb_mtp_queue_result(s, RES_OK, trans,
1227 0, 0, 0, 0);
1228 break;
1229 case DELETE_FAILURE:
1230 usb_mtp_queue_result(s, RES_PARTIAL_DELETE,
1231 trans, 0, 0, 0, 0);
1232 break;
1233 case DELETE_PARTIAL:
1234 usb_mtp_queue_result(s, RES_PARTIAL_DELETE,
1235 trans, 0, 0, 0, 0);
1236 break;
1237 default:
1238 g_assert_not_reached();
1239 }
1240
1241 return;
1242 }
1243
1244 static void usb_mtp_command(MTPState *s, MTPControl *c)
1245 {
1246 MTPData *data_in = NULL;
1247 MTPObject *o = NULL;
1248 uint32_t nres = 0, res0 = 0;
1249 Error *err = NULL;
1250
1251 /* sanity checks */
1252 if (c->code >= CMD_CLOSE_SESSION && s->session == 0) {
1253 usb_mtp_queue_result(s, RES_SESSION_NOT_OPEN,
1254 c->trans, 0, 0, 0, 0);
1255 return;
1256 }
1257
1258 /* process commands */
1259 switch (c->code) {
1260 case CMD_GET_DEVICE_INFO:
1261 data_in = usb_mtp_get_device_info(s, c);
1262 break;
1263 case CMD_OPEN_SESSION:
1264 if (s->session) {
1265 usb_mtp_queue_result(s, RES_SESSION_ALREADY_OPEN,
1266 c->trans, 1, s->session, 0, 0);
1267 return;
1268 }
1269 if (c->argv[0] == 0) {
1270 usb_mtp_queue_result(s, RES_INVALID_PARAMETER,
1271 c->trans, 0, 0, 0, 0);
1272 return;
1273 }
1274 trace_usb_mtp_op_open_session(s->dev.addr);
1275 s->session = c->argv[0];
1276 usb_mtp_object_alloc(s, s->next_handle++, NULL, s->root);
1277
1278 s->file_monitor = qemu_file_monitor_new(&err);
1279 if (err) {
1280 error_reportf_err(err,
1281 "usb-mtp: file monitoring init failed: ");
1282 } else {
1283 QTAILQ_INIT(&s->events);
1284 }
1285 break;
1286 case CMD_CLOSE_SESSION:
1287 trace_usb_mtp_op_close_session(s->dev.addr);
1288 s->session = 0;
1289 s->next_handle = 0;
1290 usb_mtp_file_monitor_cleanup(s);
1291 usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects));
1292 assert(QTAILQ_EMPTY(&s->objects));
1293 break;
1294 case CMD_GET_STORAGE_IDS:
1295 data_in = usb_mtp_get_storage_ids(s, c);
1296 break;
1297 case CMD_GET_STORAGE_INFO:
1298 if (c->argv[0] != QEMU_STORAGE_ID &&
1299 c->argv[0] != 0xffffffff) {
1300 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID,
1301 c->trans, 0, 0, 0, 0);
1302 return;
1303 }
1304 data_in = usb_mtp_get_storage_info(s, c);
1305 break;
1306 case CMD_GET_NUM_OBJECTS:
1307 case CMD_GET_OBJECT_HANDLES:
1308 if (c->argv[0] != QEMU_STORAGE_ID &&
1309 c->argv[0] != 0xffffffff) {
1310 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID,
1311 c->trans, 0, 0, 0, 0);
1312 return;
1313 }
1314 if (c->argv[1] != 0x00000000) {
1315 usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED,
1316 c->trans, 0, 0, 0, 0);
1317 return;
1318 }
1319 if (c->argv[2] == 0x00000000 ||
1320 c->argv[2] == 0xffffffff) {
1321 o = QTAILQ_FIRST(&s->objects);
1322 } else {
1323 o = usb_mtp_object_lookup(s, c->argv[2]);
1324 }
1325 if (o == NULL) {
1326 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1327 c->trans, 0, 0, 0, 0);
1328 return;
1329 }
1330 if (o->format != FMT_ASSOCIATION) {
1331 usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT,
1332 c->trans, 0, 0, 0, 0);
1333 return;
1334 }
1335 usb_mtp_object_readdir(s, o);
1336 if (c->code == CMD_GET_NUM_OBJECTS) {
1337 trace_usb_mtp_op_get_num_objects(s->dev.addr, o->handle, o->path);
1338 nres = 1;
1339 res0 = o->nchildren;
1340 } else {
1341 data_in = usb_mtp_get_object_handles(s, c, o);
1342 }
1343 break;
1344 case CMD_GET_OBJECT_INFO:
1345 o = usb_mtp_object_lookup(s, c->argv[0]);
1346 if (o == NULL) {
1347 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1348 c->trans, 0, 0, 0, 0);
1349 return;
1350 }
1351 data_in = usb_mtp_get_object_info(s, c, o);
1352 break;
1353 case CMD_GET_OBJECT:
1354 o = usb_mtp_object_lookup(s, c->argv[0]);
1355 if (o == NULL) {
1356 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1357 c->trans, 0, 0, 0, 0);
1358 return;
1359 }
1360 if (o->format == FMT_ASSOCIATION) {
1361 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1362 c->trans, 0, 0, 0, 0);
1363 return;
1364 }
1365 data_in = usb_mtp_get_object(s, c, o);
1366 if (data_in == NULL) {
1367 usb_mtp_queue_result(s, RES_GENERAL_ERROR,
1368 c->trans, 0, 0, 0, 0);
1369 return;
1370 }
1371 break;
1372 case CMD_DELETE_OBJECT:
1373 usb_mtp_object_delete(s, c->argv[0], c->argv[1], c->trans);
1374 return;
1375 case CMD_GET_PARTIAL_OBJECT:
1376 o = usb_mtp_object_lookup(s, c->argv[0]);
1377 if (o == NULL) {
1378 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1379 c->trans, 0, 0, 0, 0);
1380 return;
1381 }
1382 if (o->format == FMT_ASSOCIATION) {
1383 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1384 c->trans, 0, 0, 0, 0);
1385 return;
1386 }
1387 data_in = usb_mtp_get_partial_object(s, c, o);
1388 if (data_in == NULL) {
1389 usb_mtp_queue_result(s, RES_GENERAL_ERROR,
1390 c->trans, 0, 0, 0, 0);
1391 return;
1392 }
1393 nres = 1;
1394 res0 = data_in->length;
1395 break;
1396 case CMD_SEND_OBJECT_INFO:
1397 /* Return error if store is read-only */
1398 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) {
1399 usb_mtp_queue_result(s, RES_STORE_READ_ONLY,
1400 c->trans, 0, 0, 0, 0);
1401 } else if (c->argv[0] && (c->argv[0] != QEMU_STORAGE_ID)) {
1402 /* First parameter points to storage id or is 0 */
1403 usb_mtp_queue_result(s, RES_STORE_NOT_AVAILABLE, c->trans,
1404 0, 0, 0, 0);
1405 } else if (c->argv[1] && !c->argv[0]) {
1406 /* If second parameter is specified, first must also be specified */
1407 usb_mtp_queue_result(s, RES_DESTINATION_UNSUPPORTED, c->trans,
1408 0, 0, 0, 0);
1409 } else {
1410 uint32_t handle = c->argv[1];
1411 if (handle == 0xFFFFFFFF || handle == 0) {
1412 /* root object */
1413 o = QTAILQ_FIRST(&s->objects);
1414 } else {
1415 o = usb_mtp_object_lookup(s, handle);
1416 }
1417 if (o == NULL) {
1418 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, c->trans,
1419 0, 0, 0, 0);
1420 } else if (o->format != FMT_ASSOCIATION) {
1421 usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT, c->trans,
1422 0, 0, 0, 0);
1423 }
1424 }
1425 if (o) {
1426 s->dataset.parent_handle = o->handle;
1427 }
1428 s->data_out = usb_mtp_data_alloc(c);
1429 return;
1430 case CMD_SEND_OBJECT:
1431 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) {
1432 usb_mtp_queue_result(s, RES_STORE_READ_ONLY,
1433 c->trans, 0, 0, 0, 0);
1434 return;
1435 }
1436 if (!s->write_pending) {
1437 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO,
1438 c->trans, 0, 0, 0, 0);
1439 return;
1440 }
1441 s->data_out = usb_mtp_data_alloc(c);
1442 return;
1443 case CMD_GET_OBJECT_PROPS_SUPPORTED:
1444 if (c->argv[0] != FMT_UNDEFINED_OBJECT &&
1445 c->argv[0] != FMT_ASSOCIATION) {
1446 usb_mtp_queue_result(s, RES_INVALID_OBJECT_FORMAT_CODE,
1447 c->trans, 0, 0, 0, 0);
1448 return;
1449 }
1450 data_in = usb_mtp_get_object_props_supported(s, c);
1451 break;
1452 case CMD_GET_OBJECT_PROP_DESC:
1453 if (c->argv[1] != FMT_UNDEFINED_OBJECT &&
1454 c->argv[1] != FMT_ASSOCIATION) {
1455 usb_mtp_queue_result(s, RES_INVALID_OBJECT_FORMAT_CODE,
1456 c->trans, 0, 0, 0, 0);
1457 return;
1458 }
1459 data_in = usb_mtp_get_object_prop_desc(s, c);
1460 if (data_in == NULL) {
1461 usb_mtp_queue_result(s, RES_INVALID_OBJECT_PROP_CODE,
1462 c->trans, 0, 0, 0, 0);
1463 return;
1464 }
1465 break;
1466 case CMD_GET_OBJECT_PROP_VALUE:
1467 o = usb_mtp_object_lookup(s, c->argv[0]);
1468 if (o == NULL) {
1469 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1470 c->trans, 0, 0, 0, 0);
1471 return;
1472 }
1473 data_in = usb_mtp_get_object_prop_value(s, c, o);
1474 if (data_in == NULL) {
1475 usb_mtp_queue_result(s, RES_INVALID_OBJECT_PROP_CODE,
1476 c->trans, 0, 0, 0, 0);
1477 return;
1478 }
1479 break;
1480 default:
1481 trace_usb_mtp_op_unknown(s->dev.addr, c->code);
1482 usb_mtp_queue_result(s, RES_OPERATION_NOT_SUPPORTED,
1483 c->trans, 0, 0, 0, 0);
1484 return;
1485 }
1486
1487 /* return results on success */
1488 if (data_in) {
1489 assert(s->data_in == NULL);
1490 s->data_in = data_in;
1491 }
1492 usb_mtp_queue_result(s, RES_OK, c->trans, nres, res0, 0, 0);
1493 }
1494
1495 /* ----------------------------------------------------------------------- */
1496
1497 static void usb_mtp_handle_reset(USBDevice *dev)
1498 {
1499 MTPState *s = USB_MTP(dev);
1500
1501 trace_usb_mtp_reset(s->dev.addr);
1502
1503 usb_mtp_file_monitor_cleanup(s);
1504 usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects));
1505 s->session = 0;
1506 usb_mtp_data_free(s->data_in);
1507 s->data_in = NULL;
1508 usb_mtp_data_free(s->data_out);
1509 s->data_out = NULL;
1510 g_free(s->result);
1511 s->result = NULL;
1512 }
1513
1514 static void usb_mtp_handle_control(USBDevice *dev, USBPacket *p,
1515 int request, int value, int index,
1516 int length, uint8_t *data)
1517 {
1518 int ret;
1519 MTPState *s = USB_MTP(dev);
1520 uint16_t *event = (uint16_t *)data;
1521
1522 switch (request) {
1523 case ClassInterfaceOutRequest | 0x64:
1524 if (*event == EVT_CANCEL_TRANSACTION) {
1525 g_free(s->result);
1526 s->result = NULL;
1527 usb_mtp_data_free(s->data_in);
1528 s->data_in = NULL;
1529 if (s->write_pending) {
1530 g_free(s->dataset.filename);
1531 s->write_pending = false;
1532 s->dataset.size = 0;
1533 }
1534 usb_mtp_data_free(s->data_out);
1535 s->data_out = NULL;
1536 } else {
1537 p->status = USB_RET_STALL;
1538 }
1539 break;
1540 default:
1541 ret = usb_desc_handle_control(dev, p, request,
1542 value, index, length, data);
1543 if (ret >= 0) {
1544 return;
1545 }
1546 }
1547
1548 trace_usb_mtp_stall(dev->addr, "unknown control request");
1549 }
1550
1551 static void usb_mtp_cancel_packet(USBDevice *dev, USBPacket *p)
1552 {
1553 /* we don't use async packets, so this should never be called */
1554 fprintf(stderr, "%s\n", __func__);
1555 }
1556
1557 static char *utf16_to_str(uint8_t len, uint8_t *str16)
1558 {
1559 wchar_t *wstr = g_new0(wchar_t, len + 1);
1560 int count, dlen;
1561 char *dest;
1562
1563 for (count = 0; count < len; count++) {
1564 /* FIXME: not working for surrogate pairs */
1565 wstr[count] = lduw_le_p(str16 + (count * 2));
1566 }
1567 wstr[count] = 0;
1568
1569 dlen = wcstombs(NULL, wstr, 0) + 1;
1570 dest = g_malloc(dlen);
1571 wcstombs(dest, wstr, dlen);
1572 g_free(wstr);
1573 return dest;
1574 }
1575
1576 /* Wrapper around write, returns 0 on failure */
1577 static uint64_t write_retry(int fd, void *buf, uint64_t size, off_t offset)
1578 {
1579 uint64_t ret = 0;
1580
1581 if (lseek(fd, offset, SEEK_SET) < 0) {
1582 goto done;
1583 }
1584
1585 ret = qemu_write_full(fd, buf, size);
1586
1587 done:
1588 return ret;
1589 }
1590
1591 static int usb_mtp_update_object(MTPObject *parent, char *name)
1592 {
1593 int ret = 0;
1594
1595 MTPObject *o =
1596 usb_mtp_object_lookup_name(parent, name, strlen(name));
1597
1598 if (o) {
1599 ret = lstat(o->path, &o->stat);
1600 }
1601
1602 return ret;
1603 }
1604
1605 static void usb_mtp_write_data(MTPState *s, uint32_t handle)
1606 {
1607 MTPData *d = s->data_out;
1608 MTPObject *parent =
1609 usb_mtp_object_lookup(s, s->dataset.parent_handle);
1610 char *path = NULL;
1611 uint64_t rc;
1612 mode_t mask = 0644;
1613 int ret = 0;
1614
1615 assert(d != NULL);
1616
1617 switch (d->write_status) {
1618 case WRITE_START:
1619 if (!parent || !s->write_pending) {
1620 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, d->trans,
1621 0, 0, 0, 0);
1622 return;
1623 }
1624
1625 if (s->dataset.filename) {
1626 path = g_strdup_printf("%s/%s", parent->path, s->dataset.filename);
1627 if (s->dataset.format == FMT_ASSOCIATION) {
1628 ret = mkdir(path, mask);
1629 if (!ret) {
1630 usb_mtp_queue_result(s, RES_OK, d->trans, 3,
1631 QEMU_STORAGE_ID,
1632 s->dataset.parent_handle,
1633 handle);
1634 goto close;
1635 }
1636 goto done;
1637 }
1638
1639 d->fd = open(path, O_CREAT | O_WRONLY |
1640 O_CLOEXEC | O_NOFOLLOW, mask);
1641 if (d->fd == -1) {
1642 ret = 1;
1643 goto done;
1644 }
1645
1646 /* Return success if initiator sent 0 sized data */
1647 if (!s->dataset.size) {
1648 goto done;
1649 }
1650 if (d->length != MTP_WRITE_BUF_SZ && !d->pending) {
1651 d->write_status = WRITE_END;
1652 }
1653 }
1654 /* fall through */
1655 case WRITE_CONTINUE:
1656 case WRITE_END:
1657 rc = write_retry(d->fd, d->data, d->data_offset,
1658 d->offset - d->data_offset);
1659 if (rc != d->data_offset) {
1660 ret = 1;
1661 goto done;
1662 }
1663 if (d->write_status != WRITE_END) {
1664 g_free(path);
1665 return;
1666 } else {
1667 /*
1668 * Return an incomplete transfer if file size doesn't match
1669 * for < 4G file or if lstat fails which will result in an incorrect
1670 * file size
1671 */
1672 if ((s->dataset.size != 0xFFFFFFFF &&
1673 d->offset != s->dataset.size) ||
1674 usb_mtp_update_object(parent, s->dataset.filename)) {
1675 usb_mtp_queue_result(s, RES_INCOMPLETE_TRANSFER, d->trans,
1676 0, 0, 0, 0);
1677 goto close;
1678 }
1679 }
1680 }
1681
1682 done:
1683 if (ret) {
1684 usb_mtp_queue_result(s, RES_STORE_FULL, d->trans,
1685 0, 0, 0, 0);
1686 } else {
1687 usb_mtp_queue_result(s, RES_OK, d->trans,
1688 0, 0, 0, 0);
1689 }
1690 close:
1691 /*
1692 * The write dataset is kept around and freed only
1693 * on success or if another write request comes in
1694 */
1695 if (d->fd != -1) {
1696 close(d->fd);
1697 d->fd = -1;
1698 }
1699 g_free(s->dataset.filename);
1700 s->dataset.size = 0;
1701 g_free(path);
1702 s->write_pending = false;
1703 }
1704
1705 static void usb_mtp_write_metadata(MTPState *s, uint64_t dlen)
1706 {
1707 MTPData *d = s->data_out;
1708 ObjectInfo *dataset = (ObjectInfo *)d->data;
1709 char *filename;
1710 MTPObject *o;
1711 MTPObject *p = usb_mtp_object_lookup(s, s->dataset.parent_handle);
1712 uint32_t next_handle = s->next_handle;
1713 size_t filename_chars = dlen - offsetof(ObjectInfo, filename);
1714
1715 /*
1716 * filename is utf-16. We're intentionally doing
1717 * integer division to truncate if malicious guest
1718 * sent an odd number of bytes.
1719 */
1720 filename_chars /= 2;
1721
1722 assert(!s->write_pending);
1723 assert(p != NULL);
1724
1725 filename = utf16_to_str(MIN(dataset->length, filename_chars),
1726 dataset->filename);
1727
1728 if (strchr(filename, '/')) {
1729 usb_mtp_queue_result(s, RES_PARAMETER_NOT_SUPPORTED, d->trans,
1730 0, 0, 0, 0);
1731 g_free(filename);
1732 return;
1733 }
1734
1735 o = usb_mtp_object_lookup_name(p, filename, -1);
1736 if (o != NULL) {
1737 next_handle = o->handle;
1738 }
1739
1740 s->dataset.filename = filename;
1741 s->dataset.format = dataset->format;
1742 s->dataset.size = dataset->size;
1743 s->write_pending = true;
1744
1745 if (s->dataset.format == FMT_ASSOCIATION) {
1746 usb_mtp_write_data(s, next_handle);
1747 } else {
1748 usb_mtp_queue_result(s, RES_OK, d->trans, 3, QEMU_STORAGE_ID,
1749 s->dataset.parent_handle, next_handle);
1750 }
1751 }
1752
1753 static void usb_mtp_get_data(MTPState *s, mtp_container *container,
1754 USBPacket *p)
1755 {
1756 MTPData *d = s->data_out;
1757 uint64_t dlen;
1758 uint32_t data_len = p->iov.size;
1759 uint64_t total_len;
1760
1761 if (!d) {
1762 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, 0,
1763 0, 0, 0, 0);
1764 return;
1765 }
1766 if (d->first) {
1767 /* Total length of incoming data */
1768 total_len = cpu_to_le32(container->length) - sizeof(mtp_container);
1769 /* Length of data in this packet */
1770 data_len -= sizeof(mtp_container);
1771 if (total_len < MTP_WRITE_BUF_SZ) {
1772 usb_mtp_realloc(d, total_len);
1773 d->length += total_len;
1774 } else {
1775 usb_mtp_realloc(d, MTP_WRITE_BUF_SZ - sizeof(mtp_container));
1776 d->length += MTP_WRITE_BUF_SZ - sizeof(mtp_container);
1777 }
1778 d->offset = 0;
1779 d->first = false;
1780 d->pending = false;
1781 d->data_offset = 0;
1782 d->write_status = WRITE_START;
1783 }
1784
1785 if (d->pending) {
1786 memset(d->data, 0, d->length);
1787 if (d->length != MTP_WRITE_BUF_SZ) {
1788 usb_mtp_realloc(d, MTP_WRITE_BUF_SZ - d->length);
1789 d->length += (MTP_WRITE_BUF_SZ - d->length);
1790 }
1791 d->pending = false;
1792 d->write_status = WRITE_CONTINUE;
1793 d->data_offset = 0;
1794 }
1795
1796 if (d->length - d->data_offset > data_len) {
1797 dlen = data_len;
1798 } else {
1799 dlen = d->length - d->data_offset;
1800 }
1801
1802 switch (d->code) {
1803 case CMD_SEND_OBJECT_INFO:
1804 usb_packet_copy(p, d->data + d->data_offset, dlen);
1805 d->offset += dlen;
1806 d->data_offset += dlen;
1807 if (d->data_offset == d->length) {
1808 /* The operation might have already failed */
1809 if (!s->result) {
1810 usb_mtp_write_metadata(s, dlen);
1811 }
1812 usb_mtp_data_free(s->data_out);
1813 s->data_out = NULL;
1814 return;
1815 }
1816 break;
1817 case CMD_SEND_OBJECT:
1818 usb_packet_copy(p, d->data + d->data_offset, dlen);
1819 d->offset += dlen;
1820 d->data_offset += dlen;
1821 if ((p->iov.size % 64) || !p->iov.size) {
1822 assert((s->dataset.size == 0xFFFFFFFF) ||
1823 (s->dataset.size == d->offset));
1824
1825 if (d->length == MTP_WRITE_BUF_SZ) {
1826 d->write_status = WRITE_END;
1827 } else {
1828 d->write_status = WRITE_START;
1829 }
1830 usb_mtp_write_data(s, 0);
1831 usb_mtp_data_free(s->data_out);
1832 s->data_out = NULL;
1833 return;
1834 }
1835 if (d->data_offset == d->length) {
1836 d->pending = true;
1837 usb_mtp_write_data(s, 0);
1838 }
1839 break;
1840 default:
1841 p->status = USB_RET_STALL;
1842 return;
1843 }
1844 }
1845
1846 static void usb_mtp_handle_data(USBDevice *dev, USBPacket *p)
1847 {
1848 MTPState *s = USB_MTP(dev);
1849 MTPControl cmd;
1850 mtp_container container;
1851 uint32_t params[5];
1852 uint16_t container_type;
1853 int i, rc;
1854
1855 switch (p->ep->nr) {
1856 case EP_DATA_IN:
1857 if (s->data_out != NULL) {
1858 /* guest bug */
1859 trace_usb_mtp_stall(s->dev.addr, "awaiting data-out");
1860 p->status = USB_RET_STALL;
1861 return;
1862 }
1863 if (p->iov.size < sizeof(container)) {
1864 trace_usb_mtp_stall(s->dev.addr, "packet too small");
1865 p->status = USB_RET_STALL;
1866 return;
1867 }
1868 if (s->data_in != NULL) {
1869 MTPData *d = s->data_in;
1870 uint64_t dlen = d->length - d->offset;
1871 if (d->first) {
1872 trace_usb_mtp_data_in(s->dev.addr, d->trans, d->length);
1873 if (d->length + sizeof(container) > 0xFFFFFFFF) {
1874 container.length = cpu_to_le32(0xFFFFFFFF);
1875 } else {
1876 container.length =
1877 cpu_to_le32(d->length + sizeof(container));
1878 }
1879 container.type = cpu_to_le16(TYPE_DATA);
1880 container.code = cpu_to_le16(d->code);
1881 container.trans = cpu_to_le32(d->trans);
1882 usb_packet_copy(p, &container, sizeof(container));
1883 d->first = false;
1884 if (dlen > p->iov.size - sizeof(container)) {
1885 dlen = p->iov.size - sizeof(container);
1886 }
1887 } else {
1888 if (dlen > p->iov.size) {
1889 dlen = p->iov.size;
1890 }
1891 }
1892 if (d->fd == -1) {
1893 usb_packet_copy(p, d->data + d->offset, dlen);
1894 } else {
1895 if (d->alloc < p->iov.size) {
1896 d->alloc = p->iov.size;
1897 d->data = g_realloc(d->data, d->alloc);
1898 }
1899 rc = read(d->fd, d->data, dlen);
1900 if (rc != dlen) {
1901 memset(d->data, 0, dlen);
1902 s->result->code = RES_INCOMPLETE_TRANSFER;
1903 }
1904 usb_packet_copy(p, d->data, dlen);
1905 }
1906 d->offset += dlen;
1907 if (d->offset == d->length) {
1908 usb_mtp_data_free(s->data_in);
1909 s->data_in = NULL;
1910 }
1911 } else if (s->result != NULL) {
1912 MTPControl *r = s->result;
1913 int length = sizeof(container) + r->argc * sizeof(uint32_t);
1914 if (r->code == RES_OK) {
1915 trace_usb_mtp_success(s->dev.addr, r->trans,
1916 (r->argc > 0) ? r->argv[0] : 0,
1917 (r->argc > 1) ? r->argv[1] : 0);
1918 } else {
1919 trace_usb_mtp_error(s->dev.addr, r->code, r->trans,
1920 (r->argc > 0) ? r->argv[0] : 0,
1921 (r->argc > 1) ? r->argv[1] : 0);
1922 }
1923 container.length = cpu_to_le32(length);
1924 container.type = cpu_to_le16(TYPE_RESPONSE);
1925 container.code = cpu_to_le16(r->code);
1926 container.trans = cpu_to_le32(r->trans);
1927 for (i = 0; i < r->argc; i++) {
1928 params[i] = cpu_to_le32(r->argv[i]);
1929 }
1930 usb_packet_copy(p, &container, sizeof(container));
1931 usb_packet_copy(p, &params, length - sizeof(container));
1932 g_free(s->result);
1933 s->result = NULL;
1934 }
1935 break;
1936 case EP_DATA_OUT:
1937 if (p->iov.size < sizeof(container)) {
1938 trace_usb_mtp_stall(s->dev.addr, "packet too small");
1939 p->status = USB_RET_STALL;
1940 return;
1941 }
1942 if ((s->data_out != NULL) && !s->data_out->first) {
1943 container_type = TYPE_DATA;
1944 } else {
1945 usb_packet_copy(p, &container, sizeof(container));
1946 container_type = le16_to_cpu(container.type);
1947 }
1948 switch (container_type) {
1949 case TYPE_COMMAND:
1950 if (s->data_in || s->data_out || s->result) {
1951 trace_usb_mtp_stall(s->dev.addr, "transaction inflight");
1952 p->status = USB_RET_STALL;
1953 return;
1954 }
1955 cmd.code = le16_to_cpu(container.code);
1956 cmd.argc = (le32_to_cpu(container.length) - sizeof(container))
1957 / sizeof(uint32_t);
1958 cmd.trans = le32_to_cpu(container.trans);
1959 if (cmd.argc > ARRAY_SIZE(cmd.argv)) {
1960 cmd.argc = ARRAY_SIZE(cmd.argv);
1961 }
1962 if (p->iov.size < sizeof(container) + cmd.argc * sizeof(uint32_t)) {
1963 trace_usb_mtp_stall(s->dev.addr, "packet too small");
1964 p->status = USB_RET_STALL;
1965 return;
1966 }
1967 usb_packet_copy(p, &params, cmd.argc * sizeof(uint32_t));
1968 for (i = 0; i < cmd.argc; i++) {
1969 cmd.argv[i] = le32_to_cpu(params[i]);
1970 }
1971 trace_usb_mtp_command(s->dev.addr, cmd.code, cmd.trans,
1972 (cmd.argc > 0) ? cmd.argv[0] : 0,
1973 (cmd.argc > 1) ? cmd.argv[1] : 0,
1974 (cmd.argc > 2) ? cmd.argv[2] : 0,
1975 (cmd.argc > 3) ? cmd.argv[3] : 0,
1976 (cmd.argc > 4) ? cmd.argv[4] : 0);
1977 usb_mtp_command(s, &cmd);
1978 break;
1979 case TYPE_DATA:
1980 /* One of the previous transfers has already errored but the
1981 * responder is still sending data associated with it
1982 */
1983 if (s->result != NULL) {
1984 return;
1985 }
1986 usb_mtp_get_data(s, &container, p);
1987 break;
1988 default:
1989 /* not needed as long as the mtp device is read-only */
1990 p->status = USB_RET_STALL;
1991 return;
1992 }
1993 break;
1994 case EP_EVENT:
1995 if (!QTAILQ_EMPTY(&s->events)) {
1996 struct MTPMonEntry *e = QTAILQ_LAST(&s->events);
1997 uint32_t handle;
1998 int len = sizeof(container) + sizeof(uint32_t);
1999
2000 if (p->iov.size < len) {
2001 trace_usb_mtp_stall(s->dev.addr,
2002 "packet too small to send event");
2003 p->status = USB_RET_STALL;
2004 return;
2005 }
2006
2007 QTAILQ_REMOVE(&s->events, e, next);
2008 container.length = cpu_to_le32(len);
2009 container.type = cpu_to_le32(TYPE_EVENT);
2010 container.code = cpu_to_le16(e->event);
2011 container.trans = 0; /* no trans specific events */
2012 handle = cpu_to_le32(e->handle);
2013 usb_packet_copy(p, &container, sizeof(container));
2014 usb_packet_copy(p, &handle, sizeof(uint32_t));
2015 g_free(e);
2016 return;
2017 }
2018 p->status = USB_RET_NAK;
2019 return;
2020 default:
2021 trace_usb_mtp_stall(s->dev.addr, "invalid endpoint");
2022 p->status = USB_RET_STALL;
2023 return;
2024 }
2025
2026 if (p->actual_length == 0) {
2027 trace_usb_mtp_nak(s->dev.addr, p->ep->nr);
2028 p->status = USB_RET_NAK;
2029 return;
2030 } else {
2031 trace_usb_mtp_xfer(s->dev.addr, p->ep->nr, p->actual_length,
2032 p->iov.size);
2033 return;
2034 }
2035 }
2036
2037 static void usb_mtp_realize(USBDevice *dev, Error **errp)
2038 {
2039 MTPState *s = USB_MTP(dev);
2040
2041 if ((s->root == NULL) || !g_path_is_absolute(s->root)) {
2042 error_setg(errp, "usb-mtp: rootdir must be configured and be an absolute path");
2043 return;
2044 }
2045
2046 if (access(s->root, R_OK) != 0) {
2047 error_setg(errp, "usb-mtp: rootdir does not exist/not readable");
2048 return;
2049 } else if (!s->readonly && access(s->root, W_OK) != 0) {
2050 error_setg(errp, "usb-mtp: rootdir does not have write permissions");
2051 return;
2052 }
2053
2054 /* Mark store as RW */
2055 if (!s->readonly) {
2056 s->flags |= (1 << MTP_FLAG_WRITABLE);
2057 }
2058
2059 if (s->desc == NULL) {
2060 /*
2061 * This does not check if path exists
2062 * but we have the checks above
2063 */
2064 s->desc = g_path_get_basename(s->root);
2065 }
2066
2067 usb_desc_create_serial(dev);
2068 usb_desc_init(dev);
2069 QTAILQ_INIT(&s->objects);
2070
2071 }
2072
2073 static const VMStateDescription vmstate_usb_mtp = {
2074 .name = "usb-mtp",
2075 .unmigratable = 1,
2076 .version_id = 1,
2077 .minimum_version_id = 1,
2078 .fields = (VMStateField[]) {
2079 VMSTATE_USB_DEVICE(dev, MTPState),
2080 VMSTATE_END_OF_LIST()
2081 }
2082 };
2083
2084 static Property mtp_properties[] = {
2085 DEFINE_PROP_STRING("rootdir", MTPState, root),
2086 DEFINE_PROP_STRING("desc", MTPState, desc),
2087 DEFINE_PROP_BOOL("readonly", MTPState, readonly, true),
2088 DEFINE_PROP_END_OF_LIST(),
2089 };
2090
2091 static void usb_mtp_class_initfn(ObjectClass *klass, void *data)
2092 {
2093 DeviceClass *dc = DEVICE_CLASS(klass);
2094 USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
2095
2096 uc->realize = usb_mtp_realize;
2097 uc->product_desc = "QEMU USB MTP";
2098 uc->usb_desc = &desc;
2099 uc->cancel_packet = usb_mtp_cancel_packet;
2100 uc->handle_attach = usb_desc_attach;
2101 uc->handle_reset = usb_mtp_handle_reset;
2102 uc->handle_control = usb_mtp_handle_control;
2103 uc->handle_data = usb_mtp_handle_data;
2104 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
2105 dc->desc = "USB Media Transfer Protocol device";
2106 dc->fw_name = "mtp";
2107 dc->vmsd = &vmstate_usb_mtp;
2108 device_class_set_props(dc, mtp_properties);
2109 }
2110
2111 static TypeInfo mtp_info = {
2112 .name = TYPE_USB_MTP,
2113 .parent = TYPE_USB_DEVICE,
2114 .instance_size = sizeof(MTPState),
2115 .class_init = usb_mtp_class_initfn,
2116 };
2117
2118 static void usb_mtp_register_types(void)
2119 {
2120 type_register_static(&mtp_info);
2121 }
2122
2123 type_init(usb_mtp_register_types)