meson: convert qapi-specific to meson
[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
32 /* ----------------------------------------------------------------------- */
33
34 enum mtp_container_type {
35 TYPE_COMMAND = 1,
36 TYPE_DATA = 2,
37 TYPE_RESPONSE = 3,
38 TYPE_EVENT = 4,
39 };
40
41 /* MTP write stage, for internal use only */
42 enum mtp_write_status {
43 WRITE_START = 1,
44 WRITE_CONTINUE = 2,
45 WRITE_END = 3,
46 };
47
48 enum mtp_code {
49 /* command codes */
50 CMD_GET_DEVICE_INFO = 0x1001,
51 CMD_OPEN_SESSION = 0x1002,
52 CMD_CLOSE_SESSION = 0x1003,
53 CMD_GET_STORAGE_IDS = 0x1004,
54 CMD_GET_STORAGE_INFO = 0x1005,
55 CMD_GET_NUM_OBJECTS = 0x1006,
56 CMD_GET_OBJECT_HANDLES = 0x1007,
57 CMD_GET_OBJECT_INFO = 0x1008,
58 CMD_GET_OBJECT = 0x1009,
59 CMD_DELETE_OBJECT = 0x100b,
60 CMD_SEND_OBJECT_INFO = 0x100c,
61 CMD_SEND_OBJECT = 0x100d,
62 CMD_GET_PARTIAL_OBJECT = 0x101b,
63 CMD_GET_OBJECT_PROPS_SUPPORTED = 0x9801,
64 CMD_GET_OBJECT_PROP_DESC = 0x9802,
65 CMD_GET_OBJECT_PROP_VALUE = 0x9803,
66
67 /* response codes */
68 RES_OK = 0x2001,
69 RES_GENERAL_ERROR = 0x2002,
70 RES_SESSION_NOT_OPEN = 0x2003,
71 RES_INVALID_TRANSACTION_ID = 0x2004,
72 RES_OPERATION_NOT_SUPPORTED = 0x2005,
73 RES_PARAMETER_NOT_SUPPORTED = 0x2006,
74 RES_INCOMPLETE_TRANSFER = 0x2007,
75 RES_INVALID_STORAGE_ID = 0x2008,
76 RES_INVALID_OBJECT_HANDLE = 0x2009,
77 RES_INVALID_OBJECT_FORMAT_CODE = 0x200b,
78 RES_STORE_FULL = 0x200c,
79 RES_STORE_READ_ONLY = 0x200e,
80 RES_PARTIAL_DELETE = 0x2012,
81 RES_STORE_NOT_AVAILABLE = 0x2013,
82 RES_SPEC_BY_FORMAT_UNSUPPORTED = 0x2014,
83 RES_INVALID_OBJECTINFO = 0x2015,
84 RES_DESTINATION_UNSUPPORTED = 0x2020,
85 RES_INVALID_PARENT_OBJECT = 0x201a,
86 RES_INVALID_PARAMETER = 0x201d,
87 RES_SESSION_ALREADY_OPEN = 0x201e,
88 RES_INVALID_OBJECT_PROP_CODE = 0xA801,
89
90 /* format codes */
91 FMT_UNDEFINED_OBJECT = 0x3000,
92 FMT_ASSOCIATION = 0x3001,
93
94 /* event codes */
95 EVT_CANCEL_TRANSACTION = 0x4001,
96 EVT_OBJ_ADDED = 0x4002,
97 EVT_OBJ_REMOVED = 0x4003,
98 EVT_OBJ_INFO_CHANGED = 0x4007,
99
100 /* object properties */
101 PROP_STORAGE_ID = 0xDC01,
102 PROP_OBJECT_FORMAT = 0xDC02,
103 PROP_OBJECT_COMPRESSED_SIZE = 0xDC04,
104 PROP_PARENT_OBJECT = 0xDC0B,
105 PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER = 0xDC41,
106 PROP_NAME = 0xDC44,
107 };
108
109 enum mtp_data_type {
110 DATA_TYPE_UINT16 = 0x0004,
111 DATA_TYPE_UINT32 = 0x0006,
112 DATA_TYPE_UINT64 = 0x0008,
113 DATA_TYPE_UINT128 = 0x000a,
114 DATA_TYPE_STRING = 0xffff,
115 };
116
117 typedef struct {
118 uint32_t length;
119 uint16_t type;
120 uint16_t code;
121 uint32_t trans;
122 } QEMU_PACKED mtp_container;
123
124 /* ----------------------------------------------------------------------- */
125
126 typedef struct MTPState MTPState;
127 typedef struct MTPControl MTPControl;
128 typedef struct MTPData MTPData;
129 typedef struct MTPObject MTPObject;
130
131 enum {
132 EP_DATA_IN = 1,
133 EP_DATA_OUT,
134 EP_EVENT,
135 };
136
137 typedef struct MTPMonEntry MTPMonEntry;
138
139 struct MTPMonEntry {
140 uint32_t event;
141 uint32_t handle;
142
143 QTAILQ_ENTRY(MTPMonEntry) next;
144 };
145
146 struct MTPControl {
147 uint16_t code;
148 uint32_t trans;
149 int argc;
150 uint32_t argv[5];
151 };
152
153 struct MTPData {
154 uint16_t code;
155 uint32_t trans;
156 uint64_t offset;
157 uint64_t length;
158 uint64_t alloc;
159 uint8_t *data;
160 bool first;
161 /* Used for >4G file sizes */
162 bool pending;
163 int fd;
164 uint8_t write_status;
165 /* Internal pointer per every MTP_WRITE_BUF_SZ */
166 uint64_t data_offset;
167 };
168
169 struct MTPObject {
170 uint32_t handle;
171 uint16_t format;
172 char *name;
173 char *path;
174 struct stat stat;
175 /* file monitor watch id */
176 int64_t watchid;
177 MTPObject *parent;
178 uint32_t nchildren;
179 QLIST_HEAD(, MTPObject) children;
180 QLIST_ENTRY(MTPObject) list;
181 bool have_children;
182 QTAILQ_ENTRY(MTPObject) next;
183 };
184
185 struct MTPState {
186 USBDevice dev;
187 char *root;
188 char *desc;
189 uint32_t flags;
190
191 MTPData *data_in;
192 MTPData *data_out;
193 MTPControl *result;
194 uint32_t session;
195 uint32_t next_handle;
196 bool readonly;
197
198 QTAILQ_HEAD(, MTPObject) objects;
199 QFileMonitor *file_monitor;
200 QTAILQ_HEAD(, MTPMonEntry) events;
201 /* Responder is expecting a write operation */
202 bool write_pending;
203 struct {
204 uint32_t parent_handle;
205 uint16_t format;
206 uint32_t size;
207 char *filename;
208 } dataset;
209 };
210
211 /*
212 * ObjectInfo dataset received from initiator
213 * Fields we don't care about are ignored
214 */
215 typedef struct {
216 uint32_t storage_id; /*unused*/
217 uint16_t format;
218 uint16_t protection_status; /*unused*/
219 uint32_t size;
220 uint16_t thumb_format; /*unused*/
221 uint32_t thumb_comp_sz; /*unused*/
222 uint32_t thumb_pix_width; /*unused*/
223 uint32_t thumb_pix_height; /*unused*/
224 uint32_t image_pix_width; /*unused*/
225 uint32_t image_pix_height; /*unused*/
226 uint32_t image_bit_depth; /*unused*/
227 uint32_t parent; /*unused*/
228 uint16_t assoc_type;
229 uint32_t assoc_desc;
230 uint32_t seq_no; /*unused*/
231 uint8_t length; /*part of filename field*/
232 uint8_t filename[0]; /* UTF-16 encoded */
233 char date_created[0]; /*unused*/
234 char date_modified[0]; /*unused*/
235 char keywords[0]; /*unused*/
236 /* string and other data follows */
237 } QEMU_PACKED ObjectInfo;
238
239 #define TYPE_USB_MTP "usb-mtp"
240 #define USB_MTP(obj) OBJECT_CHECK(MTPState, (obj), TYPE_USB_MTP)
241
242 #define QEMU_STORAGE_ID 0x00010001
243
244 #define MTP_FLAG_WRITABLE 0
245
246 #define FLAG_SET(_mtp, _flag) ((_mtp)->flags & (1 << (_flag)))
247
248 /* ----------------------------------------------------------------------- */
249
250 #define MTP_MANUFACTURER "QEMU"
251 #define MTP_PRODUCT "QEMU filesharing"
252 #define MTP_WRITE_BUF_SZ (512 * KiB)
253
254 enum {
255 STR_MANUFACTURER = 1,
256 STR_PRODUCT,
257 STR_SERIALNUMBER,
258 STR_MTP,
259 STR_CONFIG_FULL,
260 STR_CONFIG_HIGH,
261 STR_CONFIG_SUPER,
262 };
263
264 static const USBDescStrings desc_strings = {
265 [STR_MANUFACTURER] = MTP_MANUFACTURER,
266 [STR_PRODUCT] = MTP_PRODUCT,
267 [STR_SERIALNUMBER] = "34617",
268 [STR_MTP] = "MTP",
269 [STR_CONFIG_FULL] = "Full speed config (usb 1.1)",
270 [STR_CONFIG_HIGH] = "High speed config (usb 2.0)",
271 [STR_CONFIG_SUPER] = "Super speed config (usb 3.0)",
272 };
273
274 static const USBDescIface desc_iface_full = {
275 .bInterfaceNumber = 0,
276 .bNumEndpoints = 3,
277 .bInterfaceClass = USB_CLASS_STILL_IMAGE,
278 .bInterfaceSubClass = 0x01,
279 .bInterfaceProtocol = 0x01,
280 .iInterface = STR_MTP,
281 .eps = (USBDescEndpoint[]) {
282 {
283 .bEndpointAddress = USB_DIR_IN | EP_DATA_IN,
284 .bmAttributes = USB_ENDPOINT_XFER_BULK,
285 .wMaxPacketSize = 64,
286 },{
287 .bEndpointAddress = USB_DIR_OUT | EP_DATA_OUT,
288 .bmAttributes = USB_ENDPOINT_XFER_BULK,
289 .wMaxPacketSize = 64,
290 },{
291 .bEndpointAddress = USB_DIR_IN | EP_EVENT,
292 .bmAttributes = USB_ENDPOINT_XFER_INT,
293 .wMaxPacketSize = 64,
294 .bInterval = 0x0a,
295 },
296 }
297 };
298
299 static const USBDescDevice desc_device_full = {
300 .bcdUSB = 0x0200,
301 .bMaxPacketSize0 = 8,
302 .bNumConfigurations = 1,
303 .confs = (USBDescConfig[]) {
304 {
305 .bNumInterfaces = 1,
306 .bConfigurationValue = 1,
307 .iConfiguration = STR_CONFIG_FULL,
308 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP,
309 .bMaxPower = 2,
310 .nif = 1,
311 .ifs = &desc_iface_full,
312 },
313 },
314 };
315
316 static const USBDescIface desc_iface_high = {
317 .bInterfaceNumber = 0,
318 .bNumEndpoints = 3,
319 .bInterfaceClass = USB_CLASS_STILL_IMAGE,
320 .bInterfaceSubClass = 0x01,
321 .bInterfaceProtocol = 0x01,
322 .iInterface = STR_MTP,
323 .eps = (USBDescEndpoint[]) {
324 {
325 .bEndpointAddress = USB_DIR_IN | EP_DATA_IN,
326 .bmAttributes = USB_ENDPOINT_XFER_BULK,
327 .wMaxPacketSize = 512,
328 },{
329 .bEndpointAddress = USB_DIR_OUT | EP_DATA_OUT,
330 .bmAttributes = USB_ENDPOINT_XFER_BULK,
331 .wMaxPacketSize = 512,
332 },{
333 .bEndpointAddress = USB_DIR_IN | EP_EVENT,
334 .bmAttributes = USB_ENDPOINT_XFER_INT,
335 .wMaxPacketSize = 64,
336 .bInterval = 0x0a,
337 },
338 }
339 };
340
341 static const USBDescDevice desc_device_high = {
342 .bcdUSB = 0x0200,
343 .bMaxPacketSize0 = 64,
344 .bNumConfigurations = 1,
345 .confs = (USBDescConfig[]) {
346 {
347 .bNumInterfaces = 1,
348 .bConfigurationValue = 1,
349 .iConfiguration = STR_CONFIG_HIGH,
350 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP,
351 .bMaxPower = 2,
352 .nif = 1,
353 .ifs = &desc_iface_high,
354 },
355 },
356 };
357
358 static const USBDescMSOS desc_msos = {
359 .CompatibleID = "MTP",
360 .SelectiveSuspendEnabled = true,
361 };
362
363 static const USBDesc desc = {
364 .id = {
365 .idVendor = 0x46f4, /* CRC16() of "QEMU" */
366 .idProduct = 0x0004,
367 .bcdDevice = 0,
368 .iManufacturer = STR_MANUFACTURER,
369 .iProduct = STR_PRODUCT,
370 .iSerialNumber = STR_SERIALNUMBER,
371 },
372 .full = &desc_device_full,
373 .high = &desc_device_high,
374 .str = desc_strings,
375 .msos = &desc_msos,
376 };
377
378 /* ----------------------------------------------------------------------- */
379
380 static MTPObject *usb_mtp_object_alloc(MTPState *s, uint32_t handle,
381 MTPObject *parent, const char *name)
382 {
383 MTPObject *o = g_new0(MTPObject, 1);
384
385 if (name[0] == '.') {
386 goto ignore;
387 }
388
389 o->watchid = -1;
390 o->handle = handle;
391 o->parent = parent;
392 o->name = g_strdup(name);
393 if (parent == NULL) {
394 o->path = g_strdup(name);
395 } else {
396 o->path = g_strdup_printf("%s/%s", parent->path, name);
397 }
398
399 if (lstat(o->path, &o->stat) != 0) {
400 goto ignore;
401 }
402 if (S_ISREG(o->stat.st_mode)) {
403 o->format = FMT_UNDEFINED_OBJECT;
404 } else if (S_ISDIR(o->stat.st_mode)) {
405 o->format = FMT_ASSOCIATION;
406 } else {
407 goto ignore;
408 }
409
410 if (access(o->path, R_OK) != 0) {
411 goto ignore;
412 }
413
414 trace_usb_mtp_object_alloc(s->dev.addr, o->handle, o->path);
415
416 QTAILQ_INSERT_TAIL(&s->objects, o, next);
417 return o;
418
419 ignore:
420 g_free(o->name);
421 g_free(o->path);
422 g_free(o);
423 return NULL;
424 }
425
426 static void usb_mtp_object_free(MTPState *s, MTPObject *o)
427 {
428 MTPObject *iter;
429
430 if (!o) {
431 return;
432 }
433
434 trace_usb_mtp_object_free(s->dev.addr, o->handle, o->path);
435
436 if (o->watchid != -1 && s->file_monitor) {
437 qemu_file_monitor_remove_watch(s->file_monitor, o->path, o->watchid);
438 }
439
440 QTAILQ_REMOVE(&s->objects, o, next);
441 if (o->parent) {
442 QLIST_REMOVE(o, list);
443 o->parent->nchildren--;
444 }
445
446 while (!QLIST_EMPTY(&o->children)) {
447 iter = QLIST_FIRST(&o->children);
448 usb_mtp_object_free(s, iter);
449 }
450 g_free(o->name);
451 g_free(o->path);
452 g_free(o);
453 }
454
455 static MTPObject *usb_mtp_object_lookup(MTPState *s, uint32_t handle)
456 {
457 MTPObject *o;
458
459 QTAILQ_FOREACH(o, &s->objects, next) {
460 if (o->handle == handle) {
461 return o;
462 }
463 }
464 return NULL;
465 }
466
467 static MTPObject *usb_mtp_add_child(MTPState *s, MTPObject *o,
468 const char *name)
469 {
470 MTPObject *child =
471 usb_mtp_object_alloc(s, s->next_handle++, o, name);
472
473 if (child) {
474 trace_usb_mtp_add_child(s->dev.addr, child->handle, child->path);
475 QLIST_INSERT_HEAD(&o->children, child, list);
476 o->nchildren++;
477
478 if (child->format == FMT_ASSOCIATION) {
479 QLIST_INIT(&child->children);
480 }
481 }
482
483 return child;
484 }
485
486 static MTPObject *usb_mtp_object_lookup_name(MTPObject *parent,
487 const char *name, int len)
488 {
489 MTPObject *iter;
490
491 if (len == -1) {
492 len = strlen(name);
493 }
494
495 QLIST_FOREACH(iter, &parent->children, list) {
496 if (strncmp(iter->name, name, len) == 0) {
497 return iter;
498 }
499 }
500
501 return NULL;
502 }
503
504 static MTPObject *usb_mtp_object_lookup_id(MTPState *s, int64_t id)
505 {
506 MTPObject *iter;
507
508 QTAILQ_FOREACH(iter, &s->objects, next) {
509 if (iter->watchid == id) {
510 return iter;
511 }
512 }
513
514 return NULL;
515 }
516
517 static void file_monitor_event(int64_t id,
518 QFileMonitorEvent ev,
519 const char *name,
520 void *opaque)
521 {
522 MTPState *s = opaque;
523 MTPObject *parent = usb_mtp_object_lookup_id(s, id);
524 MTPMonEntry *entry = NULL;
525 MTPObject *o;
526
527 if (!parent) {
528 return;
529 }
530
531 switch (ev) {
532 case QFILE_MONITOR_EVENT_CREATED:
533 if (usb_mtp_object_lookup_name(parent, name, -1)) {
534 /* Duplicate create event */
535 return;
536 }
537 entry = g_new0(MTPMonEntry, 1);
538 entry->handle = s->next_handle;
539 entry->event = EVT_OBJ_ADDED;
540 o = usb_mtp_add_child(s, parent, name);
541 if (!o) {
542 g_free(entry);
543 return;
544 }
545 trace_usb_mtp_file_monitor_event(s->dev.addr, name, "Obj Added");
546 break;
547
548 case QFILE_MONITOR_EVENT_DELETED:
549 /*
550 * The kernel issues a IN_IGNORED event
551 * when a dir containing a watchpoint is
552 * deleted, so we don't have to delete the
553 * watchpoint
554 */
555 o = usb_mtp_object_lookup_name(parent, name, -1);
556 if (!o) {
557 return;
558 }
559 entry = g_new0(MTPMonEntry, 1);
560 entry->handle = o->handle;
561 entry->event = EVT_OBJ_REMOVED;
562 trace_usb_mtp_file_monitor_event(s->dev.addr, o->path, "Obj Deleted");
563 usb_mtp_object_free(s, o);
564 break;
565
566 case QFILE_MONITOR_EVENT_MODIFIED:
567 o = usb_mtp_object_lookup_name(parent, name, -1);
568 if (!o) {
569 return;
570 }
571 entry = g_new0(MTPMonEntry, 1);
572 entry->handle = o->handle;
573 entry->event = EVT_OBJ_INFO_CHANGED;
574 trace_usb_mtp_file_monitor_event(s->dev.addr, o->path, "Obj Modified");
575 break;
576
577 case QFILE_MONITOR_EVENT_IGNORED:
578 trace_usb_mtp_file_monitor_event(s->dev.addr, parent->path,
579 "Obj parent dir ignored");
580 break;
581
582 case QFILE_MONITOR_EVENT_ATTRIBUTES:
583 break;
584
585 default:
586 g_assert_not_reached();
587 }
588
589 if (entry) {
590 QTAILQ_INSERT_HEAD(&s->events, entry, next);
591 }
592 }
593
594 static void usb_mtp_file_monitor_cleanup(MTPState *s)
595 {
596 MTPMonEntry *e, *p;
597
598 QTAILQ_FOREACH_SAFE(e, &s->events, next, p) {
599 QTAILQ_REMOVE(&s->events, e, next);
600 g_free(e);
601 }
602
603 qemu_file_monitor_free(s->file_monitor);
604 s->file_monitor = NULL;
605 }
606
607
608 static void usb_mtp_object_readdir(MTPState *s, MTPObject *o)
609 {
610 struct dirent *entry;
611 DIR *dir;
612 int fd;
613 Error *err = NULL;
614
615 if (o->have_children) {
616 return;
617 }
618 o->have_children = true;
619
620 fd = open(o->path, O_DIRECTORY | O_CLOEXEC | O_NOFOLLOW);
621 if (fd < 0) {
622 return;
623 }
624 dir = fdopendir(fd);
625 if (!dir) {
626 close(fd);
627 return;
628 }
629
630 if (s->file_monitor) {
631 int64_t id = qemu_file_monitor_add_watch(s->file_monitor, o->path, NULL,
632 file_monitor_event, s, &err);
633 if (id == -1) {
634 error_reportf_err(err,
635 "usb-mtp: failed to add watch for %s: ",
636 o->path);
637 } else {
638 trace_usb_mtp_file_monitor_event(s->dev.addr, o->path,
639 "Watch Added");
640 o->watchid = id;
641 }
642 }
643
644 while ((entry = readdir(dir)) != NULL) {
645 usb_mtp_add_child(s, o, entry->d_name);
646 }
647 closedir(dir);
648 }
649
650 /* ----------------------------------------------------------------------- */
651
652 static MTPData *usb_mtp_data_alloc(MTPControl *c)
653 {
654 MTPData *data = g_new0(MTPData, 1);
655
656 data->code = c->code;
657 data->trans = c->trans;
658 data->fd = -1;
659 data->first = true;
660 return data;
661 }
662
663 static void usb_mtp_data_free(MTPData *data)
664 {
665 if (data == NULL) {
666 return;
667 }
668 if (data->fd != -1) {
669 close(data->fd);
670 }
671 g_free(data->data);
672 g_free(data);
673 }
674
675 static void usb_mtp_realloc(MTPData *data, uint32_t bytes)
676 {
677 if (data->length + bytes <= data->alloc) {
678 return;
679 }
680 data->alloc = (data->length + bytes + 0xff) & ~0xff;
681 data->data = g_realloc(data->data, data->alloc);
682 }
683
684 static void usb_mtp_add_u8(MTPData *data, uint8_t val)
685 {
686 usb_mtp_realloc(data, 1);
687 data->data[data->length++] = val;
688 }
689
690 static void usb_mtp_add_u16(MTPData *data, uint16_t val)
691 {
692 usb_mtp_realloc(data, 2);
693 data->data[data->length++] = (val >> 0) & 0xff;
694 data->data[data->length++] = (val >> 8) & 0xff;
695 }
696
697 static void usb_mtp_add_u32(MTPData *data, uint32_t val)
698 {
699 usb_mtp_realloc(data, 4);
700 data->data[data->length++] = (val >> 0) & 0xff;
701 data->data[data->length++] = (val >> 8) & 0xff;
702 data->data[data->length++] = (val >> 16) & 0xff;
703 data->data[data->length++] = (val >> 24) & 0xff;
704 }
705
706 static void usb_mtp_add_u64(MTPData *data, uint64_t val)
707 {
708 usb_mtp_realloc(data, 8);
709 data->data[data->length++] = (val >> 0) & 0xff;
710 data->data[data->length++] = (val >> 8) & 0xff;
711 data->data[data->length++] = (val >> 16) & 0xff;
712 data->data[data->length++] = (val >> 24) & 0xff;
713 data->data[data->length++] = (val >> 32) & 0xff;
714 data->data[data->length++] = (val >> 40) & 0xff;
715 data->data[data->length++] = (val >> 48) & 0xff;
716 data->data[data->length++] = (val >> 56) & 0xff;
717 }
718
719 static void usb_mtp_add_u16_array(MTPData *data, uint32_t len,
720 const uint16_t *vals)
721 {
722 int i;
723
724 usb_mtp_add_u32(data, len);
725 for (i = 0; i < len; i++) {
726 usb_mtp_add_u16(data, vals[i]);
727 }
728 }
729
730 static void usb_mtp_add_u32_array(MTPData *data, uint32_t len,
731 const uint32_t *vals)
732 {
733 int i;
734
735 usb_mtp_add_u32(data, len);
736 for (i = 0; i < len; i++) {
737 usb_mtp_add_u32(data, vals[i]);
738 }
739 }
740
741 static void usb_mtp_add_wstr(MTPData *data, const wchar_t *str)
742 {
743 uint32_t len = wcslen(str);
744 int i;
745
746 if (len > 0) {
747 len++; /* include terminating L'\0' */
748 }
749
750 usb_mtp_add_u8(data, len);
751 for (i = 0; i < len; i++) {
752 usb_mtp_add_u16(data, str[i]);
753 }
754 }
755
756 static void usb_mtp_add_str(MTPData *data, const char *str)
757 {
758 uint32_t len = strlen(str)+1;
759 wchar_t *wstr = g_new(wchar_t, len);
760 size_t ret;
761
762 ret = mbstowcs(wstr, str, len);
763 if (ret == -1) {
764 usb_mtp_add_wstr(data, L"Oops");
765 } else {
766 usb_mtp_add_wstr(data, wstr);
767 }
768
769 g_free(wstr);
770 }
771
772 static void usb_mtp_add_time(MTPData *data, time_t time)
773 {
774 char buf[16];
775 struct tm tm;
776
777 gmtime_r(&time, &tm);
778 strftime(buf, sizeof(buf), "%Y%m%dT%H%M%S", &tm);
779 usb_mtp_add_str(data, buf);
780 }
781
782 /* ----------------------------------------------------------------------- */
783
784 static void usb_mtp_queue_result(MTPState *s, uint16_t code, uint32_t trans,
785 int argc, uint32_t arg0, uint32_t arg1,
786 uint32_t arg2)
787 {
788 MTPControl *c = g_new0(MTPControl, 1);
789
790 c->code = code;
791 c->trans = trans;
792 c->argc = argc;
793 if (argc > 0) {
794 c->argv[0] = arg0;
795 }
796 if (argc > 1) {
797 c->argv[1] = arg1;
798 }
799 if (argc > 2) {
800 c->argv[2] = arg2;
801 }
802
803 assert(s->result == NULL);
804 s->result = c;
805 }
806
807 /* ----------------------------------------------------------------------- */
808
809 static MTPData *usb_mtp_get_device_info(MTPState *s, MTPControl *c)
810 {
811 static const uint16_t ops[] = {
812 CMD_GET_DEVICE_INFO,
813 CMD_OPEN_SESSION,
814 CMD_CLOSE_SESSION,
815 CMD_GET_STORAGE_IDS,
816 CMD_GET_STORAGE_INFO,
817 CMD_GET_NUM_OBJECTS,
818 CMD_GET_OBJECT_HANDLES,
819 CMD_GET_OBJECT_INFO,
820 CMD_DELETE_OBJECT,
821 CMD_SEND_OBJECT_INFO,
822 CMD_SEND_OBJECT,
823 CMD_GET_OBJECT,
824 CMD_GET_PARTIAL_OBJECT,
825 CMD_GET_OBJECT_PROPS_SUPPORTED,
826 CMD_GET_OBJECT_PROP_DESC,
827 CMD_GET_OBJECT_PROP_VALUE,
828 };
829 static const uint16_t fmt[] = {
830 FMT_UNDEFINED_OBJECT,
831 FMT_ASSOCIATION,
832 };
833 MTPData *d = usb_mtp_data_alloc(c);
834
835 trace_usb_mtp_op_get_device_info(s->dev.addr);
836
837 usb_mtp_add_u16(d, 100);
838 usb_mtp_add_u32(d, 0x00000006);
839 usb_mtp_add_u16(d, 0x0064);
840 usb_mtp_add_wstr(d, L"");
841 usb_mtp_add_u16(d, 0x0000);
842
843 usb_mtp_add_u16_array(d, ARRAY_SIZE(ops), ops);
844 usb_mtp_add_u16_array(d, 0, NULL);
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, ARRAY_SIZE(fmt), fmt);
848
849 usb_mtp_add_wstr(d, L"" MTP_MANUFACTURER);
850 usb_mtp_add_wstr(d, L"" MTP_PRODUCT);
851 usb_mtp_add_wstr(d, L"0.1");
852 usb_mtp_add_wstr(d, L"0123456789abcdef0123456789abcdef");
853
854 return d;
855 }
856
857 static MTPData *usb_mtp_get_storage_ids(MTPState *s, MTPControl *c)
858 {
859 static const uint32_t ids[] = {
860 QEMU_STORAGE_ID,
861 };
862 MTPData *d = usb_mtp_data_alloc(c);
863
864 trace_usb_mtp_op_get_storage_ids(s->dev.addr);
865
866 usb_mtp_add_u32_array(d, ARRAY_SIZE(ids), ids);
867
868 return d;
869 }
870
871 static MTPData *usb_mtp_get_storage_info(MTPState *s, MTPControl *c)
872 {
873 MTPData *d = usb_mtp_data_alloc(c);
874 struct statvfs buf;
875 int rc;
876
877 trace_usb_mtp_op_get_storage_info(s->dev.addr);
878
879 if (FLAG_SET(s, MTP_FLAG_WRITABLE)) {
880 usb_mtp_add_u16(d, 0x0003);
881 usb_mtp_add_u16(d, 0x0002);
882 usb_mtp_add_u16(d, 0x0000);
883 } else {
884 usb_mtp_add_u16(d, 0x0001);
885 usb_mtp_add_u16(d, 0x0002);
886 usb_mtp_add_u16(d, 0x0001);
887 }
888
889 rc = statvfs(s->root, &buf);
890 if (rc == 0) {
891 usb_mtp_add_u64(d, (uint64_t)buf.f_frsize * buf.f_blocks);
892 usb_mtp_add_u64(d, (uint64_t)buf.f_bavail * buf.f_blocks);
893 usb_mtp_add_u32(d, buf.f_ffree);
894 } else {
895 usb_mtp_add_u64(d, 0xffffffff);
896 usb_mtp_add_u64(d, 0xffffffff);
897 usb_mtp_add_u32(d, 0xffffffff);
898 }
899
900 usb_mtp_add_str(d, s->desc);
901 usb_mtp_add_wstr(d, L"123456789abcdef");
902 return d;
903 }
904
905 static MTPData *usb_mtp_get_object_handles(MTPState *s, MTPControl *c,
906 MTPObject *o)
907 {
908 MTPData *d = usb_mtp_data_alloc(c);
909 uint32_t i = 0, handles[o->nchildren];
910 MTPObject *iter;
911
912 trace_usb_mtp_op_get_object_handles(s->dev.addr, o->handle, o->path);
913
914 QLIST_FOREACH(iter, &o->children, list) {
915 handles[i++] = iter->handle;
916 }
917 assert(i == o->nchildren);
918 usb_mtp_add_u32_array(d, o->nchildren, handles);
919
920 return d;
921 }
922
923 static MTPData *usb_mtp_get_object_info(MTPState *s, MTPControl *c,
924 MTPObject *o)
925 {
926 MTPData *d = usb_mtp_data_alloc(c);
927
928 trace_usb_mtp_op_get_object_info(s->dev.addr, o->handle, o->path);
929
930 usb_mtp_add_u32(d, QEMU_STORAGE_ID);
931 usb_mtp_add_u16(d, o->format);
932 usb_mtp_add_u16(d, 0);
933
934 if (o->stat.st_size > 0xFFFFFFFF) {
935 usb_mtp_add_u32(d, 0xFFFFFFFF);
936 } else {
937 usb_mtp_add_u32(d, o->stat.st_size);
938 }
939
940 usb_mtp_add_u16(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 usb_mtp_add_u32(d, 0);
947
948 if (o->parent) {
949 usb_mtp_add_u32(d, o->parent->handle);
950 } else {
951 usb_mtp_add_u32(d, 0);
952 }
953 if (o->format == FMT_ASSOCIATION) {
954 usb_mtp_add_u16(d, 0x0001);
955 usb_mtp_add_u32(d, 0x00000001);
956 usb_mtp_add_u32(d, 0);
957 } else {
958 usb_mtp_add_u16(d, 0);
959 usb_mtp_add_u32(d, 0);
960 usb_mtp_add_u32(d, 0);
961 }
962
963 usb_mtp_add_str(d, o->name);
964 usb_mtp_add_time(d, o->stat.st_ctime);
965 usb_mtp_add_time(d, o->stat.st_mtime);
966 usb_mtp_add_wstr(d, L"");
967
968 return d;
969 }
970
971 static MTPData *usb_mtp_get_object(MTPState *s, MTPControl *c,
972 MTPObject *o)
973 {
974 MTPData *d = usb_mtp_data_alloc(c);
975
976 trace_usb_mtp_op_get_object(s->dev.addr, o->handle, o->path);
977
978 d->fd = open(o->path, O_RDONLY | O_CLOEXEC | O_NOFOLLOW);
979 if (d->fd == -1) {
980 usb_mtp_data_free(d);
981 return NULL;
982 }
983 d->length = o->stat.st_size;
984 d->alloc = 512;
985 d->data = g_malloc(d->alloc);
986 return d;
987 }
988
989 static MTPData *usb_mtp_get_partial_object(MTPState *s, MTPControl *c,
990 MTPObject *o)
991 {
992 MTPData *d;
993 off_t offset;
994
995 if (c->argc <= 2) {
996 return NULL;
997 }
998 trace_usb_mtp_op_get_partial_object(s->dev.addr, o->handle, o->path,
999 c->argv[1], c->argv[2]);
1000
1001 d = usb_mtp_data_alloc(c);
1002 d->fd = open(o->path, O_RDONLY | O_CLOEXEC | O_NOFOLLOW);
1003 if (d->fd == -1) {
1004 usb_mtp_data_free(d);
1005 return NULL;
1006 }
1007
1008 offset = c->argv[1];
1009 if (offset > o->stat.st_size) {
1010 offset = o->stat.st_size;
1011 }
1012 if (lseek(d->fd, offset, SEEK_SET) < 0) {
1013 usb_mtp_data_free(d);
1014 return NULL;
1015 }
1016
1017 d->length = c->argv[2];
1018 if (d->length > o->stat.st_size - offset) {
1019 d->length = o->stat.st_size - offset;
1020 }
1021
1022 return d;
1023 }
1024
1025 static MTPData *usb_mtp_get_object_props_supported(MTPState *s, MTPControl *c)
1026 {
1027 static const uint16_t props[] = {
1028 PROP_STORAGE_ID,
1029 PROP_OBJECT_FORMAT,
1030 PROP_OBJECT_COMPRESSED_SIZE,
1031 PROP_PARENT_OBJECT,
1032 PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER,
1033 PROP_NAME,
1034 };
1035 MTPData *d = usb_mtp_data_alloc(c);
1036 usb_mtp_add_u16_array(d, ARRAY_SIZE(props), props);
1037
1038 return d;
1039 }
1040
1041 static MTPData *usb_mtp_get_object_prop_desc(MTPState *s, MTPControl *c)
1042 {
1043 MTPData *d = usb_mtp_data_alloc(c);
1044 switch (c->argv[0]) {
1045 case PROP_STORAGE_ID:
1046 usb_mtp_add_u16(d, PROP_STORAGE_ID);
1047 usb_mtp_add_u16(d, DATA_TYPE_UINT32);
1048 usb_mtp_add_u8(d, 0x00);
1049 usb_mtp_add_u32(d, 0x00000000);
1050 usb_mtp_add_u32(d, 0x00000000);
1051 usb_mtp_add_u8(d, 0x00);
1052 break;
1053 case PROP_OBJECT_FORMAT:
1054 usb_mtp_add_u16(d, PROP_OBJECT_FORMAT);
1055 usb_mtp_add_u16(d, DATA_TYPE_UINT16);
1056 usb_mtp_add_u8(d, 0x00);
1057 usb_mtp_add_u16(d, 0x0000);
1058 usb_mtp_add_u32(d, 0x00000000);
1059 usb_mtp_add_u8(d, 0x00);
1060 break;
1061 case PROP_OBJECT_COMPRESSED_SIZE:
1062 usb_mtp_add_u16(d, PROP_OBJECT_COMPRESSED_SIZE);
1063 usb_mtp_add_u16(d, DATA_TYPE_UINT64);
1064 usb_mtp_add_u8(d, 0x00);
1065 usb_mtp_add_u64(d, 0x0000000000000000);
1066 usb_mtp_add_u32(d, 0x00000000);
1067 usb_mtp_add_u8(d, 0x00);
1068 break;
1069 case PROP_PARENT_OBJECT:
1070 usb_mtp_add_u16(d, PROP_PARENT_OBJECT);
1071 usb_mtp_add_u16(d, DATA_TYPE_UINT32);
1072 usb_mtp_add_u8(d, 0x00);
1073 usb_mtp_add_u32(d, 0x00000000);
1074 usb_mtp_add_u32(d, 0x00000000);
1075 usb_mtp_add_u8(d, 0x00);
1076 break;
1077 case PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER:
1078 usb_mtp_add_u16(d, PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER);
1079 usb_mtp_add_u16(d, DATA_TYPE_UINT128);
1080 usb_mtp_add_u8(d, 0x00);
1081 usb_mtp_add_u64(d, 0x0000000000000000);
1082 usb_mtp_add_u64(d, 0x0000000000000000);
1083 usb_mtp_add_u32(d, 0x00000000);
1084 usb_mtp_add_u8(d, 0x00);
1085 break;
1086 case PROP_NAME:
1087 usb_mtp_add_u16(d, PROP_NAME);
1088 usb_mtp_add_u16(d, DATA_TYPE_STRING);
1089 usb_mtp_add_u8(d, 0x00);
1090 usb_mtp_add_u8(d, 0x00);
1091 usb_mtp_add_u32(d, 0x00000000);
1092 usb_mtp_add_u8(d, 0x00);
1093 break;
1094 default:
1095 usb_mtp_data_free(d);
1096 return NULL;
1097 }
1098
1099 return d;
1100 }
1101
1102 static MTPData *usb_mtp_get_object_prop_value(MTPState *s, MTPControl *c,
1103 MTPObject *o)
1104 {
1105 MTPData *d = usb_mtp_data_alloc(c);
1106 switch (c->argv[1]) {
1107 case PROP_STORAGE_ID:
1108 usb_mtp_add_u32(d, QEMU_STORAGE_ID);
1109 break;
1110 case PROP_OBJECT_FORMAT:
1111 usb_mtp_add_u16(d, o->format);
1112 break;
1113 case PROP_OBJECT_COMPRESSED_SIZE:
1114 usb_mtp_add_u64(d, o->stat.st_size);
1115 break;
1116 case PROP_PARENT_OBJECT:
1117 if (o->parent == NULL) {
1118 usb_mtp_add_u32(d, 0x00000000);
1119 } else {
1120 usb_mtp_add_u32(d, o->parent->handle);
1121 }
1122 break;
1123 case PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER:
1124 /* Should be persistent between sessions,
1125 * but using our objedt ID is "good enough"
1126 * for now */
1127 usb_mtp_add_u64(d, 0x0000000000000000);
1128 usb_mtp_add_u64(d, o->handle);
1129 break;
1130 case PROP_NAME:
1131 usb_mtp_add_str(d, o->name);
1132 break;
1133 default:
1134 usb_mtp_data_free(d);
1135 return NULL;
1136 }
1137
1138 return d;
1139 }
1140
1141 /*
1142 * Return values when object @o is deleted.
1143 * If at least one of the deletions succeeded,
1144 * DELETE_SUCCESS is set and if at least one
1145 * of the deletions failed, DELETE_FAILURE is
1146 * set. Both bits being set (DELETE_PARTIAL)
1147 * signifies a RES_PARTIAL_DELETE being sent
1148 * back to the initiator.
1149 */
1150 enum {
1151 DELETE_SUCCESS = (1 << 0),
1152 DELETE_FAILURE = (1 << 1),
1153 DELETE_PARTIAL = (DELETE_FAILURE | DELETE_SUCCESS),
1154 };
1155
1156 static int usb_mtp_deletefn(MTPState *s, MTPObject *o, uint32_t trans)
1157 {
1158 MTPObject *iter, *iter2;
1159 int ret = 0;
1160
1161 /*
1162 * TODO: Add support for Protection Status
1163 */
1164
1165 QLIST_FOREACH(iter, &o->children, list) {
1166 if (iter->format == FMT_ASSOCIATION) {
1167 QLIST_FOREACH(iter2, &iter->children, list) {
1168 ret |= usb_mtp_deletefn(s, iter2, trans);
1169 }
1170 }
1171 }
1172
1173 if (o->format == FMT_UNDEFINED_OBJECT) {
1174 if (remove(o->path)) {
1175 ret |= DELETE_FAILURE;
1176 } else {
1177 usb_mtp_object_free(s, o);
1178 ret |= DELETE_SUCCESS;
1179 }
1180 } else if (o->format == FMT_ASSOCIATION) {
1181 if (rmdir(o->path)) {
1182 ret |= DELETE_FAILURE;
1183 } else {
1184 usb_mtp_object_free(s, o);
1185 ret |= DELETE_SUCCESS;
1186 }
1187 }
1188
1189 return ret;
1190 }
1191
1192 static void usb_mtp_object_delete(MTPState *s, uint32_t handle,
1193 uint32_t format_code, uint32_t trans)
1194 {
1195 MTPObject *o;
1196 int ret;
1197
1198 /* Return error if store is read-only */
1199 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) {
1200 usb_mtp_queue_result(s, RES_STORE_READ_ONLY,
1201 trans, 0, 0, 0, 0);
1202 return;
1203 }
1204
1205 if (format_code != 0) {
1206 usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED,
1207 trans, 0, 0, 0, 0);
1208 return;
1209 }
1210
1211 if (handle == 0xFFFFFFF) {
1212 o = QTAILQ_FIRST(&s->objects);
1213 } else {
1214 o = usb_mtp_object_lookup(s, handle);
1215 }
1216 if (o == NULL) {
1217 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1218 trans, 0, 0, 0, 0);
1219 return;
1220 }
1221
1222 ret = usb_mtp_deletefn(s, o, trans);
1223 switch (ret) {
1224 case DELETE_SUCCESS:
1225 usb_mtp_queue_result(s, RES_OK, trans,
1226 0, 0, 0, 0);
1227 break;
1228 case DELETE_FAILURE:
1229 usb_mtp_queue_result(s, RES_PARTIAL_DELETE,
1230 trans, 0, 0, 0, 0);
1231 break;
1232 case DELETE_PARTIAL:
1233 usb_mtp_queue_result(s, RES_PARTIAL_DELETE,
1234 trans, 0, 0, 0, 0);
1235 break;
1236 default:
1237 g_assert_not_reached();
1238 }
1239
1240 return;
1241 }
1242
1243 static void usb_mtp_command(MTPState *s, MTPControl *c)
1244 {
1245 MTPData *data_in = NULL;
1246 MTPObject *o = NULL;
1247 uint32_t nres = 0, res0 = 0;
1248 Error *err = NULL;
1249
1250 /* sanity checks */
1251 if (c->code >= CMD_CLOSE_SESSION && s->session == 0) {
1252 usb_mtp_queue_result(s, RES_SESSION_NOT_OPEN,
1253 c->trans, 0, 0, 0, 0);
1254 return;
1255 }
1256
1257 /* process commands */
1258 switch (c->code) {
1259 case CMD_GET_DEVICE_INFO:
1260 data_in = usb_mtp_get_device_info(s, c);
1261 break;
1262 case CMD_OPEN_SESSION:
1263 if (s->session) {
1264 usb_mtp_queue_result(s, RES_SESSION_ALREADY_OPEN,
1265 c->trans, 1, s->session, 0, 0);
1266 return;
1267 }
1268 if (c->argv[0] == 0) {
1269 usb_mtp_queue_result(s, RES_INVALID_PARAMETER,
1270 c->trans, 0, 0, 0, 0);
1271 return;
1272 }
1273 trace_usb_mtp_op_open_session(s->dev.addr);
1274 s->session = c->argv[0];
1275 usb_mtp_object_alloc(s, s->next_handle++, NULL, s->root);
1276
1277 s->file_monitor = qemu_file_monitor_new(&err);
1278 if (err) {
1279 error_reportf_err(err,
1280 "usb-mtp: file monitoring init failed: ");
1281 } else {
1282 QTAILQ_INIT(&s->events);
1283 }
1284 break;
1285 case CMD_CLOSE_SESSION:
1286 trace_usb_mtp_op_close_session(s->dev.addr);
1287 s->session = 0;
1288 s->next_handle = 0;
1289 usb_mtp_file_monitor_cleanup(s);
1290 usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects));
1291 assert(QTAILQ_EMPTY(&s->objects));
1292 break;
1293 case CMD_GET_STORAGE_IDS:
1294 data_in = usb_mtp_get_storage_ids(s, c);
1295 break;
1296 case CMD_GET_STORAGE_INFO:
1297 if (c->argv[0] != QEMU_STORAGE_ID &&
1298 c->argv[0] != 0xffffffff) {
1299 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID,
1300 c->trans, 0, 0, 0, 0);
1301 return;
1302 }
1303 data_in = usb_mtp_get_storage_info(s, c);
1304 break;
1305 case CMD_GET_NUM_OBJECTS:
1306 case CMD_GET_OBJECT_HANDLES:
1307 if (c->argv[0] != QEMU_STORAGE_ID &&
1308 c->argv[0] != 0xffffffff) {
1309 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID,
1310 c->trans, 0, 0, 0, 0);
1311 return;
1312 }
1313 if (c->argv[1] != 0x00000000) {
1314 usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED,
1315 c->trans, 0, 0, 0, 0);
1316 return;
1317 }
1318 if (c->argv[2] == 0x00000000 ||
1319 c->argv[2] == 0xffffffff) {
1320 o = QTAILQ_FIRST(&s->objects);
1321 } else {
1322 o = usb_mtp_object_lookup(s, c->argv[2]);
1323 }
1324 if (o == NULL) {
1325 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1326 c->trans, 0, 0, 0, 0);
1327 return;
1328 }
1329 if (o->format != FMT_ASSOCIATION) {
1330 usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT,
1331 c->trans, 0, 0, 0, 0);
1332 return;
1333 }
1334 usb_mtp_object_readdir(s, o);
1335 if (c->code == CMD_GET_NUM_OBJECTS) {
1336 trace_usb_mtp_op_get_num_objects(s->dev.addr, o->handle, o->path);
1337 nres = 1;
1338 res0 = o->nchildren;
1339 } else {
1340 data_in = usb_mtp_get_object_handles(s, c, o);
1341 }
1342 break;
1343 case CMD_GET_OBJECT_INFO:
1344 o = usb_mtp_object_lookup(s, c->argv[0]);
1345 if (o == NULL) {
1346 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1347 c->trans, 0, 0, 0, 0);
1348 return;
1349 }
1350 data_in = usb_mtp_get_object_info(s, c, o);
1351 break;
1352 case CMD_GET_OBJECT:
1353 o = usb_mtp_object_lookup(s, c->argv[0]);
1354 if (o == NULL) {
1355 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1356 c->trans, 0, 0, 0, 0);
1357 return;
1358 }
1359 if (o->format == FMT_ASSOCIATION) {
1360 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1361 c->trans, 0, 0, 0, 0);
1362 return;
1363 }
1364 data_in = usb_mtp_get_object(s, c, o);
1365 if (data_in == NULL) {
1366 usb_mtp_queue_result(s, RES_GENERAL_ERROR,
1367 c->trans, 0, 0, 0, 0);
1368 return;
1369 }
1370 break;
1371 case CMD_DELETE_OBJECT:
1372 usb_mtp_object_delete(s, c->argv[0], c->argv[1], c->trans);
1373 return;
1374 case CMD_GET_PARTIAL_OBJECT:
1375 o = usb_mtp_object_lookup(s, c->argv[0]);
1376 if (o == NULL) {
1377 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1378 c->trans, 0, 0, 0, 0);
1379 return;
1380 }
1381 if (o->format == FMT_ASSOCIATION) {
1382 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1383 c->trans, 0, 0, 0, 0);
1384 return;
1385 }
1386 data_in = usb_mtp_get_partial_object(s, c, o);
1387 if (data_in == NULL) {
1388 usb_mtp_queue_result(s, RES_GENERAL_ERROR,
1389 c->trans, 0, 0, 0, 0);
1390 return;
1391 }
1392 nres = 1;
1393 res0 = data_in->length;
1394 break;
1395 case CMD_SEND_OBJECT_INFO:
1396 /* Return error if store is read-only */
1397 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) {
1398 usb_mtp_queue_result(s, RES_STORE_READ_ONLY,
1399 c->trans, 0, 0, 0, 0);
1400 } else if (c->argv[0] && (c->argv[0] != QEMU_STORAGE_ID)) {
1401 /* First parameter points to storage id or is 0 */
1402 usb_mtp_queue_result(s, RES_STORE_NOT_AVAILABLE, c->trans,
1403 0, 0, 0, 0);
1404 } else if (c->argv[1] && !c->argv[0]) {
1405 /* If second parameter is specified, first must also be specified */
1406 usb_mtp_queue_result(s, RES_DESTINATION_UNSUPPORTED, c->trans,
1407 0, 0, 0, 0);
1408 } else {
1409 uint32_t handle = c->argv[1];
1410 if (handle == 0xFFFFFFFF || handle == 0) {
1411 /* root object */
1412 o = QTAILQ_FIRST(&s->objects);
1413 } else {
1414 o = usb_mtp_object_lookup(s, handle);
1415 }
1416 if (o == NULL) {
1417 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, c->trans,
1418 0, 0, 0, 0);
1419 } else if (o->format != FMT_ASSOCIATION) {
1420 usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT, c->trans,
1421 0, 0, 0, 0);
1422 }
1423 }
1424 if (o) {
1425 s->dataset.parent_handle = o->handle;
1426 }
1427 s->data_out = usb_mtp_data_alloc(c);
1428 return;
1429 case CMD_SEND_OBJECT:
1430 if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) {
1431 usb_mtp_queue_result(s, RES_STORE_READ_ONLY,
1432 c->trans, 0, 0, 0, 0);
1433 return;
1434 }
1435 if (!s->write_pending) {
1436 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO,
1437 c->trans, 0, 0, 0, 0);
1438 return;
1439 }
1440 s->data_out = usb_mtp_data_alloc(c);
1441 return;
1442 case CMD_GET_OBJECT_PROPS_SUPPORTED:
1443 if (c->argv[0] != FMT_UNDEFINED_OBJECT &&
1444 c->argv[0] != FMT_ASSOCIATION) {
1445 usb_mtp_queue_result(s, RES_INVALID_OBJECT_FORMAT_CODE,
1446 c->trans, 0, 0, 0, 0);
1447 return;
1448 }
1449 data_in = usb_mtp_get_object_props_supported(s, c);
1450 break;
1451 case CMD_GET_OBJECT_PROP_DESC:
1452 if (c->argv[1] != FMT_UNDEFINED_OBJECT &&
1453 c->argv[1] != FMT_ASSOCIATION) {
1454 usb_mtp_queue_result(s, RES_INVALID_OBJECT_FORMAT_CODE,
1455 c->trans, 0, 0, 0, 0);
1456 return;
1457 }
1458 data_in = usb_mtp_get_object_prop_desc(s, c);
1459 if (data_in == NULL) {
1460 usb_mtp_queue_result(s, RES_INVALID_OBJECT_PROP_CODE,
1461 c->trans, 0, 0, 0, 0);
1462 return;
1463 }
1464 break;
1465 case CMD_GET_OBJECT_PROP_VALUE:
1466 o = usb_mtp_object_lookup(s, c->argv[0]);
1467 if (o == NULL) {
1468 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
1469 c->trans, 0, 0, 0, 0);
1470 return;
1471 }
1472 data_in = usb_mtp_get_object_prop_value(s, c, o);
1473 if (data_in == NULL) {
1474 usb_mtp_queue_result(s, RES_INVALID_OBJECT_PROP_CODE,
1475 c->trans, 0, 0, 0, 0);
1476 return;
1477 }
1478 break;
1479 default:
1480 trace_usb_mtp_op_unknown(s->dev.addr, c->code);
1481 usb_mtp_queue_result(s, RES_OPERATION_NOT_SUPPORTED,
1482 c->trans, 0, 0, 0, 0);
1483 return;
1484 }
1485
1486 /* return results on success */
1487 if (data_in) {
1488 assert(s->data_in == NULL);
1489 s->data_in = data_in;
1490 }
1491 usb_mtp_queue_result(s, RES_OK, c->trans, nres, res0, 0, 0);
1492 }
1493
1494 /* ----------------------------------------------------------------------- */
1495
1496 static void usb_mtp_handle_reset(USBDevice *dev)
1497 {
1498 MTPState *s = USB_MTP(dev);
1499
1500 trace_usb_mtp_reset(s->dev.addr);
1501
1502 usb_mtp_file_monitor_cleanup(s);
1503 usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects));
1504 s->session = 0;
1505 usb_mtp_data_free(s->data_in);
1506 s->data_in = NULL;
1507 usb_mtp_data_free(s->data_out);
1508 s->data_out = NULL;
1509 g_free(s->result);
1510 s->result = NULL;
1511 }
1512
1513 static void usb_mtp_handle_control(USBDevice *dev, USBPacket *p,
1514 int request, int value, int index,
1515 int length, uint8_t *data)
1516 {
1517 int ret;
1518 MTPState *s = USB_MTP(dev);
1519 uint16_t *event = (uint16_t *)data;
1520
1521 switch (request) {
1522 case ClassInterfaceOutRequest | 0x64:
1523 if (*event == EVT_CANCEL_TRANSACTION) {
1524 g_free(s->result);
1525 s->result = NULL;
1526 usb_mtp_data_free(s->data_in);
1527 s->data_in = NULL;
1528 if (s->write_pending) {
1529 g_free(s->dataset.filename);
1530 s->write_pending = false;
1531 s->dataset.size = 0;
1532 }
1533 usb_mtp_data_free(s->data_out);
1534 s->data_out = NULL;
1535 } else {
1536 p->status = USB_RET_STALL;
1537 }
1538 break;
1539 default:
1540 ret = usb_desc_handle_control(dev, p, request,
1541 value, index, length, data);
1542 if (ret >= 0) {
1543 return;
1544 }
1545 }
1546
1547 trace_usb_mtp_stall(dev->addr, "unknown control request");
1548 }
1549
1550 static void usb_mtp_cancel_packet(USBDevice *dev, USBPacket *p)
1551 {
1552 /* we don't use async packets, so this should never be called */
1553 fprintf(stderr, "%s\n", __func__);
1554 }
1555
1556 static char *utf16_to_str(uint8_t len, uint8_t *str16)
1557 {
1558 wchar_t *wstr = g_new0(wchar_t, len + 1);
1559 int count, dlen;
1560 char *dest;
1561
1562 for (count = 0; count < len; count++) {
1563 /* FIXME: not working for surrogate pairs */
1564 wstr[count] = lduw_le_p(str16 + (count * 2));
1565 }
1566 wstr[count] = 0;
1567
1568 dlen = wcstombs(NULL, wstr, 0) + 1;
1569 dest = g_malloc(dlen);
1570 wcstombs(dest, wstr, dlen);
1571 g_free(wstr);
1572 return dest;
1573 }
1574
1575 /* Wrapper around write, returns 0 on failure */
1576 static uint64_t write_retry(int fd, void *buf, uint64_t size, off_t offset)
1577 {
1578 uint64_t ret = 0;
1579
1580 if (lseek(fd, offset, SEEK_SET) < 0) {
1581 goto done;
1582 }
1583
1584 ret = qemu_write_full(fd, buf, size);
1585
1586 done:
1587 return ret;
1588 }
1589
1590 static int usb_mtp_update_object(MTPObject *parent, char *name)
1591 {
1592 int ret = 0;
1593
1594 MTPObject *o =
1595 usb_mtp_object_lookup_name(parent, name, strlen(name));
1596
1597 if (o) {
1598 ret = lstat(o->path, &o->stat);
1599 }
1600
1601 return ret;
1602 }
1603
1604 static void usb_mtp_write_data(MTPState *s, uint32_t handle)
1605 {
1606 MTPData *d = s->data_out;
1607 MTPObject *parent =
1608 usb_mtp_object_lookup(s, s->dataset.parent_handle);
1609 char *path = NULL;
1610 uint64_t rc;
1611 mode_t mask = 0644;
1612 int ret = 0;
1613
1614 assert(d != NULL);
1615
1616 switch (d->write_status) {
1617 case WRITE_START:
1618 if (!parent || !s->write_pending) {
1619 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, d->trans,
1620 0, 0, 0, 0);
1621 return;
1622 }
1623
1624 if (s->dataset.filename) {
1625 path = g_strdup_printf("%s/%s", parent->path, s->dataset.filename);
1626 if (s->dataset.format == FMT_ASSOCIATION) {
1627 ret = mkdir(path, mask);
1628 if (!ret) {
1629 usb_mtp_queue_result(s, RES_OK, d->trans, 3,
1630 QEMU_STORAGE_ID,
1631 s->dataset.parent_handle,
1632 handle);
1633 goto close;
1634 }
1635 goto done;
1636 }
1637
1638 d->fd = open(path, O_CREAT | O_WRONLY |
1639 O_CLOEXEC | O_NOFOLLOW, mask);
1640 if (d->fd == -1) {
1641 ret = 1;
1642 goto done;
1643 }
1644
1645 /* Return success if initiator sent 0 sized data */
1646 if (!s->dataset.size) {
1647 goto done;
1648 }
1649 if (d->length != MTP_WRITE_BUF_SZ && !d->pending) {
1650 d->write_status = WRITE_END;
1651 }
1652 }
1653 /* fall through */
1654 case WRITE_CONTINUE:
1655 case WRITE_END:
1656 rc = write_retry(d->fd, d->data, d->data_offset,
1657 d->offset - d->data_offset);
1658 if (rc != d->data_offset) {
1659 ret = 1;
1660 goto done;
1661 }
1662 if (d->write_status != WRITE_END) {
1663 g_free(path);
1664 return;
1665 } else {
1666 /*
1667 * Return an incomplete transfer if file size doesn't match
1668 * for < 4G file or if lstat fails which will result in an incorrect
1669 * file size
1670 */
1671 if ((s->dataset.size != 0xFFFFFFFF &&
1672 d->offset != s->dataset.size) ||
1673 usb_mtp_update_object(parent, s->dataset.filename)) {
1674 usb_mtp_queue_result(s, RES_INCOMPLETE_TRANSFER, d->trans,
1675 0, 0, 0, 0);
1676 goto close;
1677 }
1678 }
1679 }
1680
1681 done:
1682 if (ret) {
1683 usb_mtp_queue_result(s, RES_STORE_FULL, d->trans,
1684 0, 0, 0, 0);
1685 } else {
1686 usb_mtp_queue_result(s, RES_OK, d->trans,
1687 0, 0, 0, 0);
1688 }
1689 close:
1690 /*
1691 * The write dataset is kept around and freed only
1692 * on success or if another write request comes in
1693 */
1694 if (d->fd != -1) {
1695 close(d->fd);
1696 d->fd = -1;
1697 }
1698 g_free(s->dataset.filename);
1699 s->dataset.size = 0;
1700 g_free(path);
1701 s->write_pending = false;
1702 }
1703
1704 static void usb_mtp_write_metadata(MTPState *s, uint64_t dlen)
1705 {
1706 MTPData *d = s->data_out;
1707 ObjectInfo *dataset = (ObjectInfo *)d->data;
1708 char *filename;
1709 MTPObject *o;
1710 MTPObject *p = usb_mtp_object_lookup(s, s->dataset.parent_handle);
1711 uint32_t next_handle = s->next_handle;
1712 size_t filename_chars = dlen - offsetof(ObjectInfo, filename);
1713
1714 /*
1715 * filename is utf-16. We're intentionally doing
1716 * integer division to truncate if malicious guest
1717 * sent an odd number of bytes.
1718 */
1719 filename_chars /= 2;
1720
1721 assert(!s->write_pending);
1722 assert(p != NULL);
1723
1724 filename = utf16_to_str(MIN(dataset->length, filename_chars),
1725 dataset->filename);
1726
1727 if (strchr(filename, '/')) {
1728 usb_mtp_queue_result(s, RES_PARAMETER_NOT_SUPPORTED, d->trans,
1729 0, 0, 0, 0);
1730 g_free(filename);
1731 return;
1732 }
1733
1734 o = usb_mtp_object_lookup_name(p, filename, -1);
1735 if (o != NULL) {
1736 next_handle = o->handle;
1737 }
1738
1739 s->dataset.filename = filename;
1740 s->dataset.format = dataset->format;
1741 s->dataset.size = dataset->size;
1742 s->write_pending = true;
1743
1744 if (s->dataset.format == FMT_ASSOCIATION) {
1745 usb_mtp_write_data(s, next_handle);
1746 } else {
1747 usb_mtp_queue_result(s, RES_OK, d->trans, 3, QEMU_STORAGE_ID,
1748 s->dataset.parent_handle, next_handle);
1749 }
1750 }
1751
1752 static void usb_mtp_get_data(MTPState *s, mtp_container *container,
1753 USBPacket *p)
1754 {
1755 MTPData *d = s->data_out;
1756 uint64_t dlen;
1757 uint32_t data_len = p->iov.size;
1758 uint64_t total_len;
1759
1760 if (!d) {
1761 usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, 0,
1762 0, 0, 0, 0);
1763 return;
1764 }
1765 if (d->first) {
1766 /* Total length of incoming data */
1767 total_len = cpu_to_le32(container->length) - sizeof(mtp_container);
1768 /* Length of data in this packet */
1769 data_len -= sizeof(mtp_container);
1770 if (total_len < MTP_WRITE_BUF_SZ) {
1771 usb_mtp_realloc(d, total_len);
1772 d->length += total_len;
1773 } else {
1774 usb_mtp_realloc(d, MTP_WRITE_BUF_SZ - sizeof(mtp_container));
1775 d->length += MTP_WRITE_BUF_SZ - sizeof(mtp_container);
1776 }
1777 d->offset = 0;
1778 d->first = false;
1779 d->pending = false;
1780 d->data_offset = 0;
1781 d->write_status = WRITE_START;
1782 }
1783
1784 if (d->pending) {
1785 memset(d->data, 0, d->length);
1786 if (d->length != MTP_WRITE_BUF_SZ) {
1787 usb_mtp_realloc(d, MTP_WRITE_BUF_SZ - d->length);
1788 d->length += (MTP_WRITE_BUF_SZ - d->length);
1789 }
1790 d->pending = false;
1791 d->write_status = WRITE_CONTINUE;
1792 d->data_offset = 0;
1793 }
1794
1795 if (d->length - d->data_offset > data_len) {
1796 dlen = data_len;
1797 } else {
1798 dlen = d->length - d->data_offset;
1799 }
1800
1801 switch (d->code) {
1802 case CMD_SEND_OBJECT_INFO:
1803 usb_packet_copy(p, d->data + d->data_offset, dlen);
1804 d->offset += dlen;
1805 d->data_offset += dlen;
1806 if (d->data_offset == d->length) {
1807 /* The operation might have already failed */
1808 if (!s->result) {
1809 usb_mtp_write_metadata(s, dlen);
1810 }
1811 usb_mtp_data_free(s->data_out);
1812 s->data_out = NULL;
1813 return;
1814 }
1815 break;
1816 case CMD_SEND_OBJECT:
1817 usb_packet_copy(p, d->data + d->data_offset, dlen);
1818 d->offset += dlen;
1819 d->data_offset += dlen;
1820 if ((p->iov.size % 64) || !p->iov.size) {
1821 assert((s->dataset.size == 0xFFFFFFFF) ||
1822 (s->dataset.size == d->offset));
1823
1824 if (d->length == MTP_WRITE_BUF_SZ) {
1825 d->write_status = WRITE_END;
1826 } else {
1827 d->write_status = WRITE_START;
1828 }
1829 usb_mtp_write_data(s, 0);
1830 usb_mtp_data_free(s->data_out);
1831 s->data_out = NULL;
1832 return;
1833 }
1834 if (d->data_offset == d->length) {
1835 d->pending = true;
1836 usb_mtp_write_data(s, 0);
1837 }
1838 break;
1839 default:
1840 p->status = USB_RET_STALL;
1841 return;
1842 }
1843 }
1844
1845 static void usb_mtp_handle_data(USBDevice *dev, USBPacket *p)
1846 {
1847 MTPState *s = USB_MTP(dev);
1848 MTPControl cmd;
1849 mtp_container container;
1850 uint32_t params[5];
1851 uint16_t container_type;
1852 int i, rc;
1853
1854 switch (p->ep->nr) {
1855 case EP_DATA_IN:
1856 if (s->data_out != NULL) {
1857 /* guest bug */
1858 trace_usb_mtp_stall(s->dev.addr, "awaiting data-out");
1859 p->status = USB_RET_STALL;
1860 return;
1861 }
1862 if (p->iov.size < sizeof(container)) {
1863 trace_usb_mtp_stall(s->dev.addr, "packet too small");
1864 p->status = USB_RET_STALL;
1865 return;
1866 }
1867 if (s->data_in != NULL) {
1868 MTPData *d = s->data_in;
1869 uint64_t dlen = d->length - d->offset;
1870 if (d->first) {
1871 trace_usb_mtp_data_in(s->dev.addr, d->trans, d->length);
1872 if (d->length + sizeof(container) > 0xFFFFFFFF) {
1873 container.length = cpu_to_le32(0xFFFFFFFF);
1874 } else {
1875 container.length =
1876 cpu_to_le32(d->length + sizeof(container));
1877 }
1878 container.type = cpu_to_le16(TYPE_DATA);
1879 container.code = cpu_to_le16(d->code);
1880 container.trans = cpu_to_le32(d->trans);
1881 usb_packet_copy(p, &container, sizeof(container));
1882 d->first = false;
1883 if (dlen > p->iov.size - sizeof(container)) {
1884 dlen = p->iov.size - sizeof(container);
1885 }
1886 } else {
1887 if (dlen > p->iov.size) {
1888 dlen = p->iov.size;
1889 }
1890 }
1891 if (d->fd == -1) {
1892 usb_packet_copy(p, d->data + d->offset, dlen);
1893 } else {
1894 if (d->alloc < p->iov.size) {
1895 d->alloc = p->iov.size;
1896 d->data = g_realloc(d->data, d->alloc);
1897 }
1898 rc = read(d->fd, d->data, dlen);
1899 if (rc != dlen) {
1900 memset(d->data, 0, dlen);
1901 s->result->code = RES_INCOMPLETE_TRANSFER;
1902 }
1903 usb_packet_copy(p, d->data, dlen);
1904 }
1905 d->offset += dlen;
1906 if (d->offset == d->length) {
1907 usb_mtp_data_free(s->data_in);
1908 s->data_in = NULL;
1909 }
1910 } else if (s->result != NULL) {
1911 MTPControl *r = s->result;
1912 int length = sizeof(container) + r->argc * sizeof(uint32_t);
1913 if (r->code == RES_OK) {
1914 trace_usb_mtp_success(s->dev.addr, r->trans,
1915 (r->argc > 0) ? r->argv[0] : 0,
1916 (r->argc > 1) ? r->argv[1] : 0);
1917 } else {
1918 trace_usb_mtp_error(s->dev.addr, r->code, r->trans,
1919 (r->argc > 0) ? r->argv[0] : 0,
1920 (r->argc > 1) ? r->argv[1] : 0);
1921 }
1922 container.length = cpu_to_le32(length);
1923 container.type = cpu_to_le16(TYPE_RESPONSE);
1924 container.code = cpu_to_le16(r->code);
1925 container.trans = cpu_to_le32(r->trans);
1926 for (i = 0; i < r->argc; i++) {
1927 params[i] = cpu_to_le32(r->argv[i]);
1928 }
1929 usb_packet_copy(p, &container, sizeof(container));
1930 usb_packet_copy(p, &params, length - sizeof(container));
1931 g_free(s->result);
1932 s->result = NULL;
1933 }
1934 break;
1935 case EP_DATA_OUT:
1936 if (p->iov.size < sizeof(container)) {
1937 trace_usb_mtp_stall(s->dev.addr, "packet too small");
1938 p->status = USB_RET_STALL;
1939 return;
1940 }
1941 if ((s->data_out != NULL) && !s->data_out->first) {
1942 container_type = TYPE_DATA;
1943 } else {
1944 usb_packet_copy(p, &container, sizeof(container));
1945 container_type = le16_to_cpu(container.type);
1946 }
1947 switch (container_type) {
1948 case TYPE_COMMAND:
1949 if (s->data_in || s->data_out || s->result) {
1950 trace_usb_mtp_stall(s->dev.addr, "transaction inflight");
1951 p->status = USB_RET_STALL;
1952 return;
1953 }
1954 cmd.code = le16_to_cpu(container.code);
1955 cmd.argc = (le32_to_cpu(container.length) - sizeof(container))
1956 / sizeof(uint32_t);
1957 cmd.trans = le32_to_cpu(container.trans);
1958 if (cmd.argc > ARRAY_SIZE(cmd.argv)) {
1959 cmd.argc = ARRAY_SIZE(cmd.argv);
1960 }
1961 if (p->iov.size < sizeof(container) + cmd.argc * sizeof(uint32_t)) {
1962 trace_usb_mtp_stall(s->dev.addr, "packet too small");
1963 p->status = USB_RET_STALL;
1964 return;
1965 }
1966 usb_packet_copy(p, &params, cmd.argc * sizeof(uint32_t));
1967 for (i = 0; i < cmd.argc; i++) {
1968 cmd.argv[i] = le32_to_cpu(params[i]);
1969 }
1970 trace_usb_mtp_command(s->dev.addr, cmd.code, cmd.trans,
1971 (cmd.argc > 0) ? cmd.argv[0] : 0,
1972 (cmd.argc > 1) ? cmd.argv[1] : 0,
1973 (cmd.argc > 2) ? cmd.argv[2] : 0,
1974 (cmd.argc > 3) ? cmd.argv[3] : 0,
1975 (cmd.argc > 4) ? cmd.argv[4] : 0);
1976 usb_mtp_command(s, &cmd);
1977 break;
1978 case TYPE_DATA:
1979 /* One of the previous transfers has already errored but the
1980 * responder is still sending data associated with it
1981 */
1982 if (s->result != NULL) {
1983 return;
1984 }
1985 usb_mtp_get_data(s, &container, p);
1986 break;
1987 default:
1988 /* not needed as long as the mtp device is read-only */
1989 p->status = USB_RET_STALL;
1990 return;
1991 }
1992 break;
1993 case EP_EVENT:
1994 if (!QTAILQ_EMPTY(&s->events)) {
1995 struct MTPMonEntry *e = QTAILQ_LAST(&s->events);
1996 uint32_t handle;
1997 int len = sizeof(container) + sizeof(uint32_t);
1998
1999 if (p->iov.size < len) {
2000 trace_usb_mtp_stall(s->dev.addr,
2001 "packet too small to send event");
2002 p->status = USB_RET_STALL;
2003 return;
2004 }
2005
2006 QTAILQ_REMOVE(&s->events, e, next);
2007 container.length = cpu_to_le32(len);
2008 container.type = cpu_to_le32(TYPE_EVENT);
2009 container.code = cpu_to_le16(e->event);
2010 container.trans = 0; /* no trans specific events */
2011 handle = cpu_to_le32(e->handle);
2012 usb_packet_copy(p, &container, sizeof(container));
2013 usb_packet_copy(p, &handle, sizeof(uint32_t));
2014 g_free(e);
2015 return;
2016 }
2017 p->status = USB_RET_NAK;
2018 return;
2019 default:
2020 trace_usb_mtp_stall(s->dev.addr, "invalid endpoint");
2021 p->status = USB_RET_STALL;
2022 return;
2023 }
2024
2025 if (p->actual_length == 0) {
2026 trace_usb_mtp_nak(s->dev.addr, p->ep->nr);
2027 p->status = USB_RET_NAK;
2028 return;
2029 } else {
2030 trace_usb_mtp_xfer(s->dev.addr, p->ep->nr, p->actual_length,
2031 p->iov.size);
2032 return;
2033 }
2034 }
2035
2036 static void usb_mtp_realize(USBDevice *dev, Error **errp)
2037 {
2038 MTPState *s = USB_MTP(dev);
2039
2040 if ((s->root == NULL) || !g_path_is_absolute(s->root)) {
2041 error_setg(errp, "usb-mtp: rootdir must be configured and be an absolute path");
2042 return;
2043 }
2044
2045 if (access(s->root, R_OK) != 0) {
2046 error_setg(errp, "usb-mtp: rootdir does not exist/not readable");
2047 return;
2048 } else if (!s->readonly && access(s->root, W_OK) != 0) {
2049 error_setg(errp, "usb-mtp: rootdir does not have write permissions");
2050 return;
2051 }
2052
2053 /* Mark store as RW */
2054 if (!s->readonly) {
2055 s->flags |= (1 << MTP_FLAG_WRITABLE);
2056 }
2057
2058 if (s->desc == NULL) {
2059 /*
2060 * This does not check if path exists
2061 * but we have the checks above
2062 */
2063 s->desc = g_path_get_basename(s->root);
2064 }
2065
2066 usb_desc_create_serial(dev);
2067 usb_desc_init(dev);
2068 QTAILQ_INIT(&s->objects);
2069
2070 }
2071
2072 static const VMStateDescription vmstate_usb_mtp = {
2073 .name = "usb-mtp",
2074 .unmigratable = 1,
2075 .version_id = 1,
2076 .minimum_version_id = 1,
2077 .fields = (VMStateField[]) {
2078 VMSTATE_USB_DEVICE(dev, MTPState),
2079 VMSTATE_END_OF_LIST()
2080 }
2081 };
2082
2083 static Property mtp_properties[] = {
2084 DEFINE_PROP_STRING("rootdir", MTPState, root),
2085 DEFINE_PROP_STRING("desc", MTPState, desc),
2086 DEFINE_PROP_BOOL("readonly", MTPState, readonly, true),
2087 DEFINE_PROP_END_OF_LIST(),
2088 };
2089
2090 static void usb_mtp_class_initfn(ObjectClass *klass, void *data)
2091 {
2092 DeviceClass *dc = DEVICE_CLASS(klass);
2093 USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
2094
2095 uc->realize = usb_mtp_realize;
2096 uc->product_desc = "QEMU USB MTP";
2097 uc->usb_desc = &desc;
2098 uc->cancel_packet = usb_mtp_cancel_packet;
2099 uc->handle_attach = usb_desc_attach;
2100 uc->handle_reset = usb_mtp_handle_reset;
2101 uc->handle_control = usb_mtp_handle_control;
2102 uc->handle_data = usb_mtp_handle_data;
2103 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
2104 dc->desc = "USB Media Transfer Protocol device";
2105 dc->fw_name = "mtp";
2106 dc->vmsd = &vmstate_usb_mtp;
2107 device_class_set_props(dc, mtp_properties);
2108 }
2109
2110 static TypeInfo mtp_info = {
2111 .name = TYPE_USB_MTP,
2112 .parent = TYPE_USB_DEVICE,
2113 .instance_size = sizeof(MTPState),
2114 .class_init = usb_mtp_class_initfn,
2115 };
2116
2117 static void usb_mtp_register_types(void)
2118 {
2119 type_register_static(&mtp_info);
2120 }
2121
2122 type_init(usb_mtp_register_types)