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target-mips: fix detection of the end of the page during translation
[qemu/ar7.git] / hw / usb / dev-mtp.c
blob108ece8190d93a932bac5d0a6ffeb25a5a33a1d5
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 <wchar.h>
13 #include <dirent.h>
14 #include <unistd.h>
15
16 #include <sys/stat.h>
17 #include <sys/statvfs.h>
18
19 #include "qemu-common.h"
20 #include "qemu/iov.h"
21 #include "trace.h"
22 #include "hw/usb.h"
23 #include "hw/usb/desc.h"
24
25 /* ----------------------------------------------------------------------- */
26
27 enum mtp_container_type {
28 TYPE_COMMAND = 1,
29 TYPE_DATA = 2,
30 TYPE_RESPONSE = 3,
31 TYPE_EVENT = 4,
32 };
33
34 enum mtp_code {
35 /* command codes */
36 CMD_GET_DEVICE_INFO = 0x1001,
37 CMD_OPEN_SESSION = 0x1002,
38 CMD_CLOSE_SESSION = 0x1003,
39 CMD_GET_STORAGE_IDS = 0x1004,
40 CMD_GET_STORAGE_INFO = 0x1005,
41 CMD_GET_NUM_OBJECTS = 0x1006,
42 CMD_GET_OBJECT_HANDLES = 0x1007,
43 CMD_GET_OBJECT_INFO = 0x1008,
44 CMD_GET_OBJECT = 0x1009,
45 CMD_GET_PARTIAL_OBJECT = 0x101b,
46
47 /* response codes */
48 RES_OK = 0x2001,
49 RES_GENERAL_ERROR = 0x2002,
50 RES_SESSION_NOT_OPEN = 0x2003,
51 RES_INVALID_TRANSACTION_ID = 0x2004,
52 RES_OPERATION_NOT_SUPPORTED = 0x2005,
53 RES_PARAMETER_NOT_SUPPORTED = 0x2006,
54 RES_INCOMPLETE_TRANSFER = 0x2007,
55 RES_INVALID_STORAGE_ID = 0x2008,
56 RES_INVALID_OBJECT_HANDLE = 0x2009,
57 RES_SPEC_BY_FORMAT_UNSUPPORTED = 0x2014,
58 RES_INVALID_PARENT_OBJECT = 0x201a,
59 RES_INVALID_PARAMETER = 0x201d,
60 RES_SESSION_ALREADY_OPEN = 0x201e,
61
62 /* format codes */
63 FMT_UNDEFINED_OBJECT = 0x3000,
64 FMT_ASSOCIATION = 0x3001,
65 };
66
67 typedef struct {
68 uint32_t length;
69 uint16_t type;
70 uint16_t code;
71 uint32_t trans;
72 } QEMU_PACKED mtp_container;
73
74 /* ----------------------------------------------------------------------- */
75
76 typedef struct MTPState MTPState;
77 typedef struct MTPControl MTPControl;
78 typedef struct MTPData MTPData;
79 typedef struct MTPObject MTPObject;
80
81 enum {
82 EP_DATA_IN = 1,
83 EP_DATA_OUT,
84 EP_EVENT,
85 };
86
87 struct MTPControl {
88 uint16_t code;
89 uint32_t trans;
90 int argc;
91 uint32_t argv[5];
92 };
93
94 struct MTPData {
95 uint16_t code;
96 uint32_t trans;
97 uint32_t offset;
98 uint32_t length;
99 uint32_t alloc;
100 uint8_t *data;
101 bool first;
102 int fd;
103 };
104
105 struct MTPObject {
106 uint32_t handle;
107 uint16_t format;
108 char *name;
109 char *path;
110 struct stat stat;
111 MTPObject *parent;
112 MTPObject **children;
113 uint32_t nchildren;
114 bool have_children;
115 QTAILQ_ENTRY(MTPObject) next;
116 };
117
118 struct MTPState {
119 USBDevice dev;
120 char *root;
121 char *desc;
122 uint32_t flags;
123
124 MTPData *data_in;
125 MTPData *data_out;
126 MTPControl *result;
127 uint32_t session;
128 uint32_t next_handle;
129
130 QTAILQ_HEAD(, MTPObject) objects;
131 };
132
133 #define QEMU_STORAGE_ID 0x00010001
134
135 #define MTP_FLAG_WRITABLE 0
136
137 #define FLAG_SET(_mtp, _flag) ((_mtp)->flags & (1 << (_flag)))
138
139 /* ----------------------------------------------------------------------- */
140
141 #define MTP_MANUFACTURER "QEMU"
142 #define MTP_PRODUCT "QEMU filesharing"
143
144 enum {
145 STR_MANUFACTURER = 1,
146 STR_PRODUCT,
147 STR_SERIALNUMBER,
148 STR_MTP,
149 STR_CONFIG_FULL,
150 STR_CONFIG_HIGH,
151 STR_CONFIG_SUPER,
152 };
153
154 static const USBDescStrings desc_strings = {
155 [STR_MANUFACTURER] = MTP_MANUFACTURER,
156 [STR_PRODUCT] = MTP_PRODUCT,
157 [STR_SERIALNUMBER] = "34617",
158 [STR_MTP] = "MTP",
159 [STR_CONFIG_FULL] = "Full speed config (usb 1.1)",
160 [STR_CONFIG_HIGH] = "High speed config (usb 2.0)",
161 [STR_CONFIG_SUPER] = "Super speed config (usb 3.0)",
162 };
163
164 static const USBDescIface desc_iface_full = {
165 .bInterfaceNumber = 0,
166 .bNumEndpoints = 3,
167 .bInterfaceClass = USB_CLASS_STILL_IMAGE,
168 .bInterfaceSubClass = 0x01,
169 .bInterfaceProtocol = 0x01,
170 .iInterface = STR_MTP,
171 .eps = (USBDescEndpoint[]) {
172 {
173 .bEndpointAddress = USB_DIR_IN | EP_DATA_IN,
174 .bmAttributes = USB_ENDPOINT_XFER_BULK,
175 .wMaxPacketSize = 64,
176 },{
177 .bEndpointAddress = USB_DIR_OUT | EP_DATA_OUT,
178 .bmAttributes = USB_ENDPOINT_XFER_BULK,
179 .wMaxPacketSize = 64,
180 },{
181 .bEndpointAddress = USB_DIR_IN | EP_EVENT,
182 .bmAttributes = USB_ENDPOINT_XFER_INT,
183 .wMaxPacketSize = 8,
184 .bInterval = 0x0a,
185 },
186 }
187 };
188
189 static const USBDescDevice desc_device_full = {
190 .bcdUSB = 0x0200,
191 .bMaxPacketSize0 = 8,
192 .bNumConfigurations = 1,
193 .confs = (USBDescConfig[]) {
194 {
195 .bNumInterfaces = 1,
196 .bConfigurationValue = 1,
197 .iConfiguration = STR_CONFIG_FULL,
198 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP,
199 .bMaxPower = 2,
200 .nif = 1,
201 .ifs = &desc_iface_full,
202 },
203 },
204 };
205
206 static const USBDescIface desc_iface_high = {
207 .bInterfaceNumber = 0,
208 .bNumEndpoints = 3,
209 .bInterfaceClass = USB_CLASS_STILL_IMAGE,
210 .bInterfaceSubClass = 0x01,
211 .bInterfaceProtocol = 0x01,
212 .iInterface = STR_MTP,
213 .eps = (USBDescEndpoint[]) {
214 {
215 .bEndpointAddress = USB_DIR_IN | EP_DATA_IN,
216 .bmAttributes = USB_ENDPOINT_XFER_BULK,
217 .wMaxPacketSize = 512,
218 },{
219 .bEndpointAddress = USB_DIR_OUT | EP_DATA_OUT,
220 .bmAttributes = USB_ENDPOINT_XFER_BULK,
221 .wMaxPacketSize = 512,
222 },{
223 .bEndpointAddress = USB_DIR_IN | EP_EVENT,
224 .bmAttributes = USB_ENDPOINT_XFER_INT,
225 .wMaxPacketSize = 8,
226 .bInterval = 0x0a,
227 },
228 }
229 };
230
231 static const USBDescDevice desc_device_high = {
232 .bcdUSB = 0x0200,
233 .bMaxPacketSize0 = 64,
234 .bNumConfigurations = 1,
235 .confs = (USBDescConfig[]) {
236 {
237 .bNumInterfaces = 1,
238 .bConfigurationValue = 1,
239 .iConfiguration = STR_CONFIG_HIGH,
240 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP,
241 .bMaxPower = 2,
242 .nif = 1,
243 .ifs = &desc_iface_high,
244 },
245 },
246 };
247
248 static const USBDescMSOS desc_msos = {
249 .CompatibleID = "MTP",
250 .SelectiveSuspendEnabled = true,
251 };
252
253 static const USBDesc desc = {
254 .id = {
255 .idVendor = 0x46f4, /* CRC16() of "QEMU" */
256 .idProduct = 0x0004,
257 .bcdDevice = 0,
258 .iManufacturer = STR_MANUFACTURER,
259 .iProduct = STR_PRODUCT,
260 .iSerialNumber = STR_SERIALNUMBER,
261 },
262 .full = &desc_device_full,
263 .high = &desc_device_high,
264 .str = desc_strings,
265 .msos = &desc_msos,
266 };
267
268 /* ----------------------------------------------------------------------- */
269
270 static MTPObject *usb_mtp_object_alloc(MTPState *s, uint32_t handle,
271 MTPObject *parent, char *name)
272 {
273 MTPObject *o = g_new0(MTPObject, 1);
274
275 if (name[0] == '.') {
276 goto ignore;
277 }
278
279 o->handle = handle;
280 o->parent = parent;
281 o->name = g_strdup(name);
282 if (parent == NULL) {
283 o->path = g_strdup(name);
284 } else {
285 o->path = g_strdup_printf("%s/%s", parent->path, name);
286 }
287
288 if (lstat(o->path, &o->stat) != 0) {
289 goto ignore;
290 }
291 if (S_ISREG(o->stat.st_mode)) {
292 o->format = FMT_UNDEFINED_OBJECT;
293 } else if (S_ISDIR(o->stat.st_mode)) {
294 o->format = FMT_ASSOCIATION;
295 } else {
296 goto ignore;
297 }
298
299 if (access(o->path, R_OK) != 0) {
300 goto ignore;
301 }
302
303 trace_usb_mtp_object_alloc(s->dev.addr, o->handle, o->path);
304
305 QTAILQ_INSERT_TAIL(&s->objects, o, next);
306 return o;
307
308 ignore:
309 g_free(o->name);
310 g_free(o->path);
311 g_free(o);
312 return NULL;
313 }
314
315 static void usb_mtp_object_free(MTPState *s, MTPObject *o)
316 {
317 int i;
318
319 trace_usb_mtp_object_free(s->dev.addr, o->handle, o->path);
320
321 QTAILQ_REMOVE(&s->objects, o, next);
322 for (i = 0; i < o->nchildren; i++) {
323 usb_mtp_object_free(s, o->children[i]);
324 }
325 g_free(o->children);
326 g_free(o->name);
327 g_free(o->path);
328 g_free(o);
329 }
330
331 static MTPObject *usb_mtp_object_lookup(MTPState *s, uint32_t handle)
332 {
333 MTPObject *o;
334
335 QTAILQ_FOREACH(o, &s->objects, next) {
336 if (o->handle == handle) {
337 return o;
338 }
339 }
340 return NULL;
341 }
342
343 static void usb_mtp_object_readdir(MTPState *s, MTPObject *o)
344 {
345 struct dirent *entry;
346 DIR *dir;
347
348 if (o->have_children) {
349 return;
350 }
351 o->have_children = true;
352
353 dir = opendir(o->path);
354 if (!dir) {
355 return;
356 }
357 while ((entry = readdir(dir)) != NULL) {
358 if ((o->nchildren % 32) == 0) {
359 o->children = g_realloc(o->children,
360 (o->nchildren + 32) * sizeof(MTPObject *));
361 }
362 o->children[o->nchildren] =
363 usb_mtp_object_alloc(s, s->next_handle++, o, entry->d_name);
364 if (o->children[o->nchildren] != NULL) {
365 o->nchildren++;
366 }
367 }
368 closedir(dir);
369 }
370
371 /* ----------------------------------------------------------------------- */
372
373 static MTPData *usb_mtp_data_alloc(MTPControl *c)
374 {
375 MTPData *data = g_new0(MTPData, 1);
376
377 data->code = c->code;
378 data->trans = c->trans;
379 data->fd = -1;
380 data->first = true;
381 return data;
382 }
383
384 static void usb_mtp_data_free(MTPData *data)
385 {
386 if (data == NULL) {
387 return;
388 }
389 if (data->fd != -1) {
390 close(data->fd);
391 }
392 g_free(data->data);
393 g_free(data);
394 }
395
396 static void usb_mtp_realloc(MTPData *data, uint32_t bytes)
397 {
398 if (data->length + bytes <= data->alloc) {
399 return;
400 }
401 data->alloc = (data->length + bytes + 0xff) & ~0xff;
402 data->data = g_realloc(data->data, data->alloc);
403 }
404
405 static void usb_mtp_add_u8(MTPData *data, uint8_t val)
406 {
407 usb_mtp_realloc(data, 1);
408 data->data[data->length++] = val;
409 }
410
411 static void usb_mtp_add_u16(MTPData *data, uint16_t val)
412 {
413 usb_mtp_realloc(data, 2);
414 data->data[data->length++] = (val >> 0) & 0xff;
415 data->data[data->length++] = (val >> 8) & 0xff;
416 }
417
418 static void usb_mtp_add_u32(MTPData *data, uint32_t val)
419 {
420 usb_mtp_realloc(data, 4);
421 data->data[data->length++] = (val >> 0) & 0xff;
422 data->data[data->length++] = (val >> 8) & 0xff;
423 data->data[data->length++] = (val >> 16) & 0xff;
424 data->data[data->length++] = (val >> 24) & 0xff;
425 }
426
427 static void usb_mtp_add_u64(MTPData *data, uint64_t val)
428 {
429 usb_mtp_realloc(data, 8);
430 data->data[data->length++] = (val >> 0) & 0xff;
431 data->data[data->length++] = (val >> 8) & 0xff;
432 data->data[data->length++] = (val >> 16) & 0xff;
433 data->data[data->length++] = (val >> 24) & 0xff;
434 data->data[data->length++] = (val >> 32) & 0xff;
435 data->data[data->length++] = (val >> 40) & 0xff;
436 data->data[data->length++] = (val >> 48) & 0xff;
437 data->data[data->length++] = (val >> 56) & 0xff;
438 }
439
440 static void usb_mtp_add_u16_array(MTPData *data, uint32_t len,
441 const uint16_t *vals)
442 {
443 int i;
444
445 usb_mtp_add_u32(data, len);
446 for (i = 0; i < len; i++) {
447 usb_mtp_add_u16(data, vals[i]);
448 }
449 }
450
451 static void usb_mtp_add_u32_array(MTPData *data, uint32_t len,
452 const uint32_t *vals)
453 {
454 int i;
455
456 usb_mtp_add_u32(data, len);
457 for (i = 0; i < len; i++) {
458 usb_mtp_add_u32(data, vals[i]);
459 }
460 }
461
462 static void usb_mtp_add_wstr(MTPData *data, const wchar_t *str)
463 {
464 uint32_t len = wcslen(str);
465 int i;
466
467 if (len > 0) {
468 len++; /* include terminating L'\0' */
469 }
470
471 usb_mtp_add_u8(data, len);
472 for (i = 0; i < len; i++) {
473 usb_mtp_add_u16(data, str[i]);
474 }
475 }
476
477 static void usb_mtp_add_str(MTPData *data, const char *str)
478 {
479 uint32_t len = strlen(str)+1;
480 wchar_t wstr[len];
481 size_t ret;
482
483 ret = mbstowcs(wstr, str, len);
484 if (ret == -1) {
485 usb_mtp_add_wstr(data, L"Oops");
486 } else {
487 usb_mtp_add_wstr(data, wstr);
488 }
489 }
490
491 static void usb_mtp_add_time(MTPData *data, time_t time)
492 {
493 char buf[16];
494 struct tm tm;
495
496 gmtime_r(&time, &tm);
497 strftime(buf, sizeof(buf), "%Y%m%dT%H%M%S", &tm);
498 usb_mtp_add_str(data, buf);
499 }
500
501 /* ----------------------------------------------------------------------- */
502
503 static void usb_mtp_queue_result(MTPState *s, uint16_t code, uint32_t trans,
504 int argc, uint32_t arg0, uint32_t arg1)
505 {
506 MTPControl *c = g_new0(MTPControl, 1);
507
508 c->code = code;
509 c->trans = trans;
510 c->argc = argc;
511 if (argc > 0) {
512 c->argv[0] = arg0;
513 }
514 if (argc > 1) {
515 c->argv[1] = arg1;
516 }
517
518 assert(s->result == NULL);
519 s->result = c;
520 }
521
522 /* ----------------------------------------------------------------------- */
523
524 static MTPData *usb_mtp_get_device_info(MTPState *s, MTPControl *c)
525 {
526 static const uint16_t ops[] = {
527 CMD_GET_DEVICE_INFO,
528 CMD_OPEN_SESSION,
529 CMD_CLOSE_SESSION,
530 CMD_GET_STORAGE_IDS,
531 CMD_GET_STORAGE_INFO,
532 CMD_GET_NUM_OBJECTS,
533 CMD_GET_OBJECT_HANDLES,
534 CMD_GET_OBJECT_INFO,
535 CMD_GET_OBJECT,
536 CMD_GET_PARTIAL_OBJECT,
537 };
538 static const uint16_t fmt[] = {
539 FMT_UNDEFINED_OBJECT,
540 FMT_ASSOCIATION,
541 };
542 MTPData *d = usb_mtp_data_alloc(c);
543
544 trace_usb_mtp_op_get_device_info(s->dev.addr);
545
546 usb_mtp_add_u16(d, 100);
547 usb_mtp_add_u32(d, 0xffffffff);
548 usb_mtp_add_u16(d, 0x0101);
549 usb_mtp_add_wstr(d, L"");
550 usb_mtp_add_u16(d, 0x0000);
551
552 usb_mtp_add_u16_array(d, ARRAY_SIZE(ops), ops);
553 usb_mtp_add_u16_array(d, 0, NULL);
554 usb_mtp_add_u16_array(d, 0, NULL);
555 usb_mtp_add_u16_array(d, 0, NULL);
556 usb_mtp_add_u16_array(d, ARRAY_SIZE(fmt), fmt);
557
558 usb_mtp_add_wstr(d, L"" MTP_MANUFACTURER);
559 usb_mtp_add_wstr(d, L"" MTP_PRODUCT);
560 usb_mtp_add_wstr(d, L"0.1");
561 usb_mtp_add_wstr(d, L"0123456789abcdef0123456789abcdef");
562
563 return d;
564 }
565
566 static MTPData *usb_mtp_get_storage_ids(MTPState *s, MTPControl *c)
567 {
568 static const uint32_t ids[] = {
569 QEMU_STORAGE_ID,
570 };
571 MTPData *d = usb_mtp_data_alloc(c);
572
573 trace_usb_mtp_op_get_storage_ids(s->dev.addr);
574
575 usb_mtp_add_u32_array(d, ARRAY_SIZE(ids), ids);
576
577 return d;
578 }
579
580 static MTPData *usb_mtp_get_storage_info(MTPState *s, MTPControl *c)
581 {
582 MTPData *d = usb_mtp_data_alloc(c);
583 struct statvfs buf;
584 int rc;
585
586 trace_usb_mtp_op_get_storage_info(s->dev.addr);
587
588 if (FLAG_SET(s, MTP_FLAG_WRITABLE)) {
589 usb_mtp_add_u16(d, 0x0003);
590 usb_mtp_add_u16(d, 0x0002);
591 usb_mtp_add_u16(d, 0x0000);
592 } else {
593 usb_mtp_add_u16(d, 0x0001);
594 usb_mtp_add_u16(d, 0x0002);
595 usb_mtp_add_u16(d, 0x0001);
596 }
597
598 rc = statvfs(s->root, &buf);
599 if (rc == 0) {
600 usb_mtp_add_u64(d, (uint64_t)buf.f_frsize * buf.f_blocks);
601 usb_mtp_add_u64(d, (uint64_t)buf.f_bavail * buf.f_blocks);
602 usb_mtp_add_u32(d, buf.f_ffree);
603 } else {
604 usb_mtp_add_u64(d, 0xffffffff);
605 usb_mtp_add_u64(d, 0xffffffff);
606 usb_mtp_add_u32(d, 0xffffffff);
607 }
608
609 usb_mtp_add_str(d, s->desc);
610 usb_mtp_add_wstr(d, L"123456789abcdef");
611 return d;
612 }
613
614 static MTPData *usb_mtp_get_object_handles(MTPState *s, MTPControl *c,
615 MTPObject *o)
616 {
617 MTPData *d = usb_mtp_data_alloc(c);
618 uint32_t i, handles[o->nchildren];
619
620 trace_usb_mtp_op_get_object_handles(s->dev.addr, o->handle, o->path);
621
622 for (i = 0; i < o->nchildren; i++) {
623 handles[i] = o->children[i]->handle;
624 }
625 usb_mtp_add_u32_array(d, o->nchildren, handles);
626
627 return d;
628 }
629
630 static MTPData *usb_mtp_get_object_info(MTPState *s, MTPControl *c,
631 MTPObject *o)
632 {
633 MTPData *d = usb_mtp_data_alloc(c);
634
635 trace_usb_mtp_op_get_object_info(s->dev.addr, o->handle, o->path);
636
637 usb_mtp_add_u32(d, QEMU_STORAGE_ID);
638 usb_mtp_add_u16(d, o->format);
639 usb_mtp_add_u16(d, 0);
640 usb_mtp_add_u32(d, o->stat.st_size);
641
642 usb_mtp_add_u16(d, 0);
643 usb_mtp_add_u32(d, 0);
644 usb_mtp_add_u32(d, 0);
645 usb_mtp_add_u32(d, 0);
646 usb_mtp_add_u32(d, 0);
647 usb_mtp_add_u32(d, 0);
648 usb_mtp_add_u32(d, 0);
649
650 if (o->parent) {
651 usb_mtp_add_u32(d, o->parent->handle);
652 } else {
653 usb_mtp_add_u32(d, 0);
654 }
655 if (o->format == FMT_ASSOCIATION) {
656 usb_mtp_add_u16(d, 0x0001);
657 usb_mtp_add_u32(d, 0x00000001);
658 usb_mtp_add_u32(d, 0);
659 } else {
660 usb_mtp_add_u16(d, 0);
661 usb_mtp_add_u32(d, 0);
662 usb_mtp_add_u32(d, 0);
663 }
664
665 usb_mtp_add_str(d, o->name);
666 usb_mtp_add_time(d, o->stat.st_ctime);
667 usb_mtp_add_time(d, o->stat.st_mtime);
668 usb_mtp_add_wstr(d, L"");
669
670 return d;
671 }
672
673 static MTPData *usb_mtp_get_object(MTPState *s, MTPControl *c,
674 MTPObject *o)
675 {
676 MTPData *d = usb_mtp_data_alloc(c);
677
678 trace_usb_mtp_op_get_object(s->dev.addr, o->handle, o->path);
679
680 d->fd = open(o->path, O_RDONLY);
681 if (d->fd == -1) {
682 usb_mtp_data_free(d);
683 return NULL;
684 }
685 d->length = o->stat.st_size;
686 d->alloc = 512;
687 d->data = g_malloc(d->alloc);
688 return d;
689 }
690
691 static MTPData *usb_mtp_get_partial_object(MTPState *s, MTPControl *c,
692 MTPObject *o)
693 {
694 MTPData *d = usb_mtp_data_alloc(c);
695 off_t offset;
696
697 trace_usb_mtp_op_get_partial_object(s->dev.addr, o->handle, o->path,
698 c->argv[1], c->argv[2]);
699
700 d->fd = open(o->path, O_RDONLY);
701 if (d->fd == -1) {
702 usb_mtp_data_free(d);
703 return NULL;
704 }
705
706 offset = c->argv[1];
707 if (offset > o->stat.st_size) {
708 offset = o->stat.st_size;
709 }
710 if (lseek(d->fd, offset, SEEK_SET) < 0) {
711 usb_mtp_data_free(d);
712 return NULL;
713 }
714
715 d->length = c->argv[2];
716 if (d->length > o->stat.st_size - offset) {
717 d->length = o->stat.st_size - offset;
718 }
719
720 return d;
721 }
722
723 static void usb_mtp_command(MTPState *s, MTPControl *c)
724 {
725 MTPData *data_in = NULL;
726 MTPObject *o;
727 uint32_t nres = 0, res0 = 0;
728
729 /* sanity checks */
730 if (c->code >= CMD_CLOSE_SESSION && s->session == 0) {
731 usb_mtp_queue_result(s, RES_SESSION_NOT_OPEN,
732 c->trans, 0, 0, 0);
733 return;
734 }
735
736 /* process commands */
737 switch (c->code) {
738 case CMD_GET_DEVICE_INFO:
739 data_in = usb_mtp_get_device_info(s, c);
740 break;
741 case CMD_OPEN_SESSION:
742 if (s->session) {
743 usb_mtp_queue_result(s, RES_SESSION_ALREADY_OPEN,
744 c->trans, 1, s->session, 0);
745 return;
746 }
747 if (c->argv[0] == 0) {
748 usb_mtp_queue_result(s, RES_INVALID_PARAMETER,
749 c->trans, 0, 0, 0);
750 return;
751 }
752 trace_usb_mtp_op_open_session(s->dev.addr);
753 s->session = c->argv[0];
754 usb_mtp_object_alloc(s, s->next_handle++, NULL, s->root);
755 break;
756 case CMD_CLOSE_SESSION:
757 trace_usb_mtp_op_close_session(s->dev.addr);
758 s->session = 0;
759 s->next_handle = 0;
760 usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects));
761 assert(QTAILQ_EMPTY(&s->objects));
762 break;
763 case CMD_GET_STORAGE_IDS:
764 data_in = usb_mtp_get_storage_ids(s, c);
765 break;
766 case CMD_GET_STORAGE_INFO:
767 if (c->argv[0] != QEMU_STORAGE_ID &&
768 c->argv[0] != 0xffffffff) {
769 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID,
770 c->trans, 0, 0, 0);
771 return;
772 }
773 data_in = usb_mtp_get_storage_info(s, c);
774 break;
775 case CMD_GET_NUM_OBJECTS:
776 case CMD_GET_OBJECT_HANDLES:
777 if (c->argv[0] != QEMU_STORAGE_ID &&
778 c->argv[0] != 0xffffffff) {
779 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID,
780 c->trans, 0, 0, 0);
781 return;
782 }
783 if (c->argv[1] != 0x00000000) {
784 usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED,
785 c->trans, 0, 0, 0);
786 return;
787 }
788 if (c->argv[2] == 0x00000000 ||
789 c->argv[2] == 0xffffffff) {
790 o = QTAILQ_FIRST(&s->objects);
791 } else {
792 o = usb_mtp_object_lookup(s, c->argv[2]);
793 }
794 if (o == NULL) {
795 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
796 c->trans, 0, 0, 0);
797 return;
798 }
799 if (o->format != FMT_ASSOCIATION) {
800 usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT,
801 c->trans, 0, 0, 0);
802 return;
803 }
804 usb_mtp_object_readdir(s, o);
805 if (c->code == CMD_GET_NUM_OBJECTS) {
806 trace_usb_mtp_op_get_num_objects(s->dev.addr, o->handle, o->path);
807 nres = 1;
808 res0 = o->nchildren;
809 } else {
810 data_in = usb_mtp_get_object_handles(s, c, o);
811 }
812 break;
813 case CMD_GET_OBJECT_INFO:
814 o = usb_mtp_object_lookup(s, c->argv[0]);
815 if (o == NULL) {
816 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
817 c->trans, 0, 0, 0);
818 return;
819 }
820 data_in = usb_mtp_get_object_info(s, c, o);
821 break;
822 case CMD_GET_OBJECT:
823 o = usb_mtp_object_lookup(s, c->argv[0]);
824 if (o == NULL) {
825 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
826 c->trans, 0, 0, 0);
827 return;
828 }
829 if (o->format == FMT_ASSOCIATION) {
830 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
831 c->trans, 0, 0, 0);
832 return;
833 }
834 data_in = usb_mtp_get_object(s, c, o);
835 if (data_in == NULL) {
836 usb_mtp_queue_result(s, RES_GENERAL_ERROR,
837 c->trans, 0, 0, 0);
838 return;
839 }
840 break;
841 case CMD_GET_PARTIAL_OBJECT:
842 o = usb_mtp_object_lookup(s, c->argv[0]);
843 if (o == NULL) {
844 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
845 c->trans, 0, 0, 0);
846 return;
847 }
848 if (o->format == FMT_ASSOCIATION) {
849 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
850 c->trans, 0, 0, 0);
851 return;
852 }
853 data_in = usb_mtp_get_partial_object(s, c, o);
854 if (data_in == NULL) {
855 usb_mtp_queue_result(s, RES_GENERAL_ERROR,
856 c->trans, 0, 0, 0);
857 return;
858 }
859 nres = 1;
860 res0 = data_in->length;
861 break;
862 default:
863 trace_usb_mtp_op_unknown(s->dev.addr, c->code);
864 usb_mtp_queue_result(s, RES_OPERATION_NOT_SUPPORTED,
865 c->trans, 0, 0, 0);
866 return;
867 }
868
869 /* return results on success */
870 if (data_in) {
871 assert(s->data_in == NULL);
872 s->data_in = data_in;
873 }
874 usb_mtp_queue_result(s, RES_OK, c->trans, nres, res0, 0);
875 }
876
877 /* ----------------------------------------------------------------------- */
878
879 static void usb_mtp_handle_reset(USBDevice *dev)
880 {
881 MTPState *s = DO_UPCAST(MTPState, dev, dev);
882
883 trace_usb_mtp_reset(s->dev.addr);
884
885 s->session = 0;
886 usb_mtp_data_free(s->data_in);
887 s->data_in = NULL;
888 usb_mtp_data_free(s->data_out);
889 s->data_out = NULL;
890 g_free(s->result);
891 s->result = NULL;
892 }
893
894 static void usb_mtp_handle_control(USBDevice *dev, USBPacket *p,
895 int request, int value, int index,
896 int length, uint8_t *data)
897 {
898 int ret;
899
900 ret = usb_desc_handle_control(dev, p, request, value, index, length, data);
901 if (ret >= 0) {
902 return;
903 }
904
905 trace_usb_mtp_stall(dev->addr, "unknown control request");
906 p->status = USB_RET_STALL;
907 }
908
909 static void usb_mtp_cancel_packet(USBDevice *dev, USBPacket *p)
910 {
911 /* we don't use async packets, so this should never be called */
912 fprintf(stderr, "%s\n", __func__);
913 }
914
915 static void usb_mtp_handle_data(USBDevice *dev, USBPacket *p)
916 {
917 MTPState *s = DO_UPCAST(MTPState, dev, dev);
918 MTPControl cmd;
919 mtp_container container;
920 uint32_t params[5];
921 int i, rc;
922
923 switch (p->ep->nr) {
924 case EP_DATA_IN:
925 if (s->data_out != NULL) {
926 /* guest bug */
927 trace_usb_mtp_stall(s->dev.addr, "awaiting data-out");
928 p->status = USB_RET_STALL;
929 return;
930 }
931 if (p->iov.size < sizeof(container)) {
932 trace_usb_mtp_stall(s->dev.addr, "packet too small");
933 p->status = USB_RET_STALL;
934 return;
935 }
936 if (s->data_in != NULL) {
937 MTPData *d = s->data_in;
938 int dlen = d->length - d->offset;
939 if (d->first) {
940 trace_usb_mtp_data_in(s->dev.addr, d->trans, d->length);
941 container.length = cpu_to_le32(d->length + sizeof(container));
942 container.type = cpu_to_le16(TYPE_DATA);
943 container.code = cpu_to_le16(d->code);
944 container.trans = cpu_to_le32(d->trans);
945 usb_packet_copy(p, &container, sizeof(container));
946 d->first = false;
947 if (dlen > p->iov.size - sizeof(container)) {
948 dlen = p->iov.size - sizeof(container);
949 }
950 } else {
951 if (dlen > p->iov.size) {
952 dlen = p->iov.size;
953 }
954 }
955 if (d->fd == -1) {
956 usb_packet_copy(p, d->data + d->offset, dlen);
957 } else {
958 if (d->alloc < p->iov.size) {
959 d->alloc = p->iov.size;
960 d->data = g_realloc(d->data, d->alloc);
961 }
962 rc = read(d->fd, d->data, dlen);
963 if (rc != dlen) {
964 memset(d->data, 0, dlen);
965 s->result->code = RES_INCOMPLETE_TRANSFER;
966 }
967 usb_packet_copy(p, d->data, dlen);
968 }
969 d->offset += dlen;
970 if (d->offset == d->length) {
971 usb_mtp_data_free(s->data_in);
972 s->data_in = NULL;
973 }
974 } else if (s->result != NULL) {
975 MTPControl *r = s->result;
976 int length = sizeof(container) + r->argc * sizeof(uint32_t);
977 if (r->code == RES_OK) {
978 trace_usb_mtp_success(s->dev.addr, r->trans,
979 (r->argc > 0) ? r->argv[0] : 0,
980 (r->argc > 1) ? r->argv[1] : 0);
981 } else {
982 trace_usb_mtp_error(s->dev.addr, r->code, r->trans,
983 (r->argc > 0) ? r->argv[0] : 0,
984 (r->argc > 1) ? r->argv[1] : 0);
985 }
986 container.length = cpu_to_le32(length);
987 container.type = cpu_to_le16(TYPE_RESPONSE);
988 container.code = cpu_to_le16(r->code);
989 container.trans = cpu_to_le32(r->trans);
990 for (i = 0; i < r->argc; i++) {
991 params[i] = cpu_to_le32(r->argv[i]);
992 }
993 usb_packet_copy(p, &container, sizeof(container));
994 usb_packet_copy(p, &params, length - sizeof(container));
995 g_free(s->result);
996 s->result = NULL;
997 }
998 break;
999 case EP_DATA_OUT:
1000 if (p->iov.size < sizeof(container)) {
1001 trace_usb_mtp_stall(s->dev.addr, "packet too small");
1002 p->status = USB_RET_STALL;
1003 return;
1004 }
1005 usb_packet_copy(p, &container, sizeof(container));
1006 switch (le16_to_cpu(container.type)) {
1007 case TYPE_COMMAND:
1008 if (s->data_in || s->data_out || s->result) {
1009 trace_usb_mtp_stall(s->dev.addr, "transaction inflight");
1010 p->status = USB_RET_STALL;
1011 return;
1012 }
1013 cmd.code = le16_to_cpu(container.code);
1014 cmd.argc = (le32_to_cpu(container.length) - sizeof(container))
1015 / sizeof(uint32_t);
1016 cmd.trans = le32_to_cpu(container.trans);
1017 if (cmd.argc > ARRAY_SIZE(cmd.argv)) {
1018 cmd.argc = ARRAY_SIZE(cmd.argv);
1019 }
1020 if (p->iov.size < sizeof(container) + cmd.argc * sizeof(uint32_t)) {
1021 trace_usb_mtp_stall(s->dev.addr, "packet too small");
1022 p->status = USB_RET_STALL;
1023 return;
1024 }
1025 usb_packet_copy(p, &params, cmd.argc * sizeof(uint32_t));
1026 for (i = 0; i < cmd.argc; i++) {
1027 cmd.argv[i] = le32_to_cpu(params[i]);
1028 }
1029 trace_usb_mtp_command(s->dev.addr, cmd.code, cmd.trans,
1030 (cmd.argc > 0) ? cmd.argv[0] : 0,
1031 (cmd.argc > 1) ? cmd.argv[1] : 0,
1032 (cmd.argc > 2) ? cmd.argv[2] : 0,
1033 (cmd.argc > 3) ? cmd.argv[3] : 0,
1034 (cmd.argc > 4) ? cmd.argv[4] : 0);
1035 usb_mtp_command(s, &cmd);
1036 break;
1037 default:
1038 /* not needed as long as the mtp device is read-only */
1039 p->status = USB_RET_STALL;
1040 return;
1041 }
1042 break;
1043 case EP_EVENT:
1044 p->status = USB_RET_NAK;
1045 return;
1046 default:
1047 trace_usb_mtp_stall(s->dev.addr, "invalid endpoint");
1048 p->status = USB_RET_STALL;
1049 return;
1050 }
1051
1052 if (p->actual_length == 0) {
1053 trace_usb_mtp_nak(s->dev.addr, p->ep->nr);
1054 p->status = USB_RET_NAK;
1055 return;
1056 } else {
1057 trace_usb_mtp_xfer(s->dev.addr, p->ep->nr, p->actual_length,
1058 p->iov.size);
1059 return;
1060 }
1061 }
1062
1063 static void usb_mtp_realize(USBDevice *dev, Error **errp)
1064 {
1065 MTPState *s = DO_UPCAST(MTPState, dev, dev);
1066
1067 usb_desc_create_serial(dev);
1068 usb_desc_init(dev);
1069 QTAILQ_INIT(&s->objects);
1070 if (s->desc == NULL) {
1071 s->desc = strrchr(s->root, '/');
1072 if (s->desc && s->desc[0]) {
1073 s->desc = g_strdup(s->desc + 1);
1074 } else {
1075 s->desc = g_strdup("none");
1076 }
1077 }
1078 }
1079
1080 static const VMStateDescription vmstate_usb_mtp = {
1081 .name = "usb-mtp",
1082 .unmigratable = 1,
1083 .version_id = 1,
1084 .minimum_version_id = 1,
1085 .fields = (VMStateField[]) {
1086 VMSTATE_USB_DEVICE(dev, MTPState),
1087 VMSTATE_END_OF_LIST()
1088 }
1089 };
1090
1091 static Property mtp_properties[] = {
1092 DEFINE_PROP_STRING("x-root", MTPState, root),
1093 DEFINE_PROP_STRING("desc", MTPState, desc),
1094 DEFINE_PROP_END_OF_LIST(),
1095 };
1096
1097 static void usb_mtp_class_initfn(ObjectClass *klass, void *data)
1098 {
1099 DeviceClass *dc = DEVICE_CLASS(klass);
1100 USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
1101
1102 uc->realize = usb_mtp_realize;
1103 uc->product_desc = "QEMU USB MTP";
1104 uc->usb_desc = &desc;
1105 uc->cancel_packet = usb_mtp_cancel_packet;
1106 uc->handle_attach = usb_desc_attach;
1107 uc->handle_reset = usb_mtp_handle_reset;
1108 uc->handle_control = usb_mtp_handle_control;
1109 uc->handle_data = usb_mtp_handle_data;
1110 dc->fw_name = "mtp";
1111 dc->vmsd = &vmstate_usb_mtp;
1112 dc->props = mtp_properties;
1113 }
1114
1115 static TypeInfo mtp_info = {
1116 .name = "usb-mtp",
1117 .parent = TYPE_USB_DEVICE,
1118 .instance_size = sizeof(MTPState),
1119 .class_init = usb_mtp_class_initfn,
1120 };
1121
1122 static void usb_mtp_register_types(void)
1123 {
1124 type_register_static(&mtp_info);
1125 }
1126
1127 type_init(usb_mtp_register_types)
AR7 emulation for QEMU