2 * Media Transfer Protocol implementation, backed by host filesystem.
4 * Copyright Red Hat, Inc 2014
7 * Gerd Hoffmann <kraxel@redhat.com>
9 * This code is licensed under the GPL v2 or later.
17 #include <sys/statvfs.h>
19 #include "qemu-common.h"
23 #include "hw/usb/desc.h"
25 /* ----------------------------------------------------------------------- */
27 enum mtp_container_type {
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,
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,
63 FMT_UNDEFINED_OBJECT = 0x3000,
64 FMT_ASSOCIATION = 0x3001,
72 } QEMU_PACKED mtp_container;
74 /* ----------------------------------------------------------------------- */
76 typedef struct MTPState MTPState;
77 typedef struct MTPControl MTPControl;
78 typedef struct MTPData MTPData;
79 typedef struct MTPObject MTPObject;
112 MTPObject **children;
115 QTAILQ_ENTRY(MTPObject) next;
128 uint32_t next_handle;
130 QTAILQ_HEAD(, MTPObject) objects;
133 #define TYPE_USB_MTP "usb-mtp"
134 #define USB_MTP(obj) OBJECT_CHECK(MTPState, (obj), TYPE_USB_MTP)
136 #define QEMU_STORAGE_ID 0x00010001
138 #define MTP_FLAG_WRITABLE 0
140 #define FLAG_SET(_mtp, _flag) ((_mtp)->flags & (1 << (_flag)))
142 /* ----------------------------------------------------------------------- */
144 #define MTP_MANUFACTURER "QEMU"
145 #define MTP_PRODUCT "QEMU filesharing"
148 STR_MANUFACTURER = 1,
157 static const USBDescStrings desc_strings = {
158 [STR_MANUFACTURER] = MTP_MANUFACTURER,
159 [STR_PRODUCT] = MTP_PRODUCT,
160 [STR_SERIALNUMBER] = "34617",
162 [STR_CONFIG_FULL] = "Full speed config (usb 1.1)",
163 [STR_CONFIG_HIGH] = "High speed config (usb 2.0)",
164 [STR_CONFIG_SUPER] = "Super speed config (usb 3.0)",
167 static const USBDescIface desc_iface_full = {
168 .bInterfaceNumber = 0,
170 .bInterfaceClass = USB_CLASS_STILL_IMAGE,
171 .bInterfaceSubClass = 0x01,
172 .bInterfaceProtocol = 0x01,
173 .iInterface = STR_MTP,
174 .eps = (USBDescEndpoint[]) {
176 .bEndpointAddress = USB_DIR_IN | EP_DATA_IN,
177 .bmAttributes = USB_ENDPOINT_XFER_BULK,
178 .wMaxPacketSize = 64,
180 .bEndpointAddress = USB_DIR_OUT | EP_DATA_OUT,
181 .bmAttributes = USB_ENDPOINT_XFER_BULK,
182 .wMaxPacketSize = 64,
184 .bEndpointAddress = USB_DIR_IN | EP_EVENT,
185 .bmAttributes = USB_ENDPOINT_XFER_INT,
192 static const USBDescDevice desc_device_full = {
194 .bMaxPacketSize0 = 8,
195 .bNumConfigurations = 1,
196 .confs = (USBDescConfig[]) {
199 .bConfigurationValue = 1,
200 .iConfiguration = STR_CONFIG_FULL,
201 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP,
204 .ifs = &desc_iface_full,
209 static const USBDescIface desc_iface_high = {
210 .bInterfaceNumber = 0,
212 .bInterfaceClass = USB_CLASS_STILL_IMAGE,
213 .bInterfaceSubClass = 0x01,
214 .bInterfaceProtocol = 0x01,
215 .iInterface = STR_MTP,
216 .eps = (USBDescEndpoint[]) {
218 .bEndpointAddress = USB_DIR_IN | EP_DATA_IN,
219 .bmAttributes = USB_ENDPOINT_XFER_BULK,
220 .wMaxPacketSize = 512,
222 .bEndpointAddress = USB_DIR_OUT | EP_DATA_OUT,
223 .bmAttributes = USB_ENDPOINT_XFER_BULK,
224 .wMaxPacketSize = 512,
226 .bEndpointAddress = USB_DIR_IN | EP_EVENT,
227 .bmAttributes = USB_ENDPOINT_XFER_INT,
234 static const USBDescDevice desc_device_high = {
236 .bMaxPacketSize0 = 64,
237 .bNumConfigurations = 1,
238 .confs = (USBDescConfig[]) {
241 .bConfigurationValue = 1,
242 .iConfiguration = STR_CONFIG_HIGH,
243 .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP,
246 .ifs = &desc_iface_high,
251 static const USBDescMSOS desc_msos = {
252 .CompatibleID = "MTP",
253 .SelectiveSuspendEnabled = true,
256 static const USBDesc desc = {
258 .idVendor = 0x46f4, /* CRC16() of "QEMU" */
261 .iManufacturer = STR_MANUFACTURER,
262 .iProduct = STR_PRODUCT,
263 .iSerialNumber = STR_SERIALNUMBER,
265 .full = &desc_device_full,
266 .high = &desc_device_high,
271 /* ----------------------------------------------------------------------- */
273 static MTPObject *usb_mtp_object_alloc(MTPState *s, uint32_t handle,
274 MTPObject *parent, char *name)
276 MTPObject *o = g_new0(MTPObject, 1);
278 if (name[0] == '.') {
284 o->name = g_strdup(name);
285 if (parent == NULL) {
286 o->path = g_strdup(name);
288 o->path = g_strdup_printf("%s/%s", parent->path, name);
291 if (lstat(o->path, &o->stat) != 0) {
294 if (S_ISREG(o->stat.st_mode)) {
295 o->format = FMT_UNDEFINED_OBJECT;
296 } else if (S_ISDIR(o->stat.st_mode)) {
297 o->format = FMT_ASSOCIATION;
302 if (access(o->path, R_OK) != 0) {
306 trace_usb_mtp_object_alloc(s->dev.addr, o->handle, o->path);
308 QTAILQ_INSERT_TAIL(&s->objects, o, next);
318 static void usb_mtp_object_free(MTPState *s, MTPObject *o)
322 trace_usb_mtp_object_free(s->dev.addr, o->handle, o->path);
324 QTAILQ_REMOVE(&s->objects, o, next);
325 for (i = 0; i < o->nchildren; i++) {
326 usb_mtp_object_free(s, o->children[i]);
334 static MTPObject *usb_mtp_object_lookup(MTPState *s, uint32_t handle)
338 QTAILQ_FOREACH(o, &s->objects, next) {
339 if (o->handle == handle) {
346 static void usb_mtp_object_readdir(MTPState *s, MTPObject *o)
348 struct dirent *entry;
351 if (o->have_children) {
354 o->have_children = true;
356 dir = opendir(o->path);
360 while ((entry = readdir(dir)) != NULL) {
361 if ((o->nchildren % 32) == 0) {
362 o->children = g_realloc(o->children,
363 (o->nchildren + 32) * sizeof(MTPObject *));
365 o->children[o->nchildren] =
366 usb_mtp_object_alloc(s, s->next_handle++, o, entry->d_name);
367 if (o->children[o->nchildren] != NULL) {
374 /* ----------------------------------------------------------------------- */
376 static MTPData *usb_mtp_data_alloc(MTPControl *c)
378 MTPData *data = g_new0(MTPData, 1);
380 data->code = c->code;
381 data->trans = c->trans;
387 static void usb_mtp_data_free(MTPData *data)
392 if (data->fd != -1) {
399 static void usb_mtp_realloc(MTPData *data, uint32_t bytes)
401 if (data->length + bytes <= data->alloc) {
404 data->alloc = (data->length + bytes + 0xff) & ~0xff;
405 data->data = g_realloc(data->data, data->alloc);
408 static void usb_mtp_add_u8(MTPData *data, uint8_t val)
410 usb_mtp_realloc(data, 1);
411 data->data[data->length++] = val;
414 static void usb_mtp_add_u16(MTPData *data, uint16_t val)
416 usb_mtp_realloc(data, 2);
417 data->data[data->length++] = (val >> 0) & 0xff;
418 data->data[data->length++] = (val >> 8) & 0xff;
421 static void usb_mtp_add_u32(MTPData *data, uint32_t val)
423 usb_mtp_realloc(data, 4);
424 data->data[data->length++] = (val >> 0) & 0xff;
425 data->data[data->length++] = (val >> 8) & 0xff;
426 data->data[data->length++] = (val >> 16) & 0xff;
427 data->data[data->length++] = (val >> 24) & 0xff;
430 static void usb_mtp_add_u64(MTPData *data, uint64_t val)
432 usb_mtp_realloc(data, 8);
433 data->data[data->length++] = (val >> 0) & 0xff;
434 data->data[data->length++] = (val >> 8) & 0xff;
435 data->data[data->length++] = (val >> 16) & 0xff;
436 data->data[data->length++] = (val >> 24) & 0xff;
437 data->data[data->length++] = (val >> 32) & 0xff;
438 data->data[data->length++] = (val >> 40) & 0xff;
439 data->data[data->length++] = (val >> 48) & 0xff;
440 data->data[data->length++] = (val >> 56) & 0xff;
443 static void usb_mtp_add_u16_array(MTPData *data, uint32_t len,
444 const uint16_t *vals)
448 usb_mtp_add_u32(data, len);
449 for (i = 0; i < len; i++) {
450 usb_mtp_add_u16(data, vals[i]);
454 static void usb_mtp_add_u32_array(MTPData *data, uint32_t len,
455 const uint32_t *vals)
459 usb_mtp_add_u32(data, len);
460 for (i = 0; i < len; i++) {
461 usb_mtp_add_u32(data, vals[i]);
465 static void usb_mtp_add_wstr(MTPData *data, const wchar_t *str)
467 uint32_t len = wcslen(str);
471 len++; /* include terminating L'\0' */
474 usb_mtp_add_u8(data, len);
475 for (i = 0; i < len; i++) {
476 usb_mtp_add_u16(data, str[i]);
480 static void usb_mtp_add_str(MTPData *data, const char *str)
482 uint32_t len = strlen(str)+1;
486 ret = mbstowcs(wstr, str, len);
488 usb_mtp_add_wstr(data, L"Oops");
490 usb_mtp_add_wstr(data, wstr);
494 static void usb_mtp_add_time(MTPData *data, time_t time)
499 gmtime_r(&time, &tm);
500 strftime(buf, sizeof(buf), "%Y%m%dT%H%M%S", &tm);
501 usb_mtp_add_str(data, buf);
504 /* ----------------------------------------------------------------------- */
506 static void usb_mtp_queue_result(MTPState *s, uint16_t code, uint32_t trans,
507 int argc, uint32_t arg0, uint32_t arg1)
509 MTPControl *c = g_new0(MTPControl, 1);
521 assert(s->result == NULL);
525 /* ----------------------------------------------------------------------- */
527 static MTPData *usb_mtp_get_device_info(MTPState *s, MTPControl *c)
529 static const uint16_t ops[] = {
534 CMD_GET_STORAGE_INFO,
536 CMD_GET_OBJECT_HANDLES,
539 CMD_GET_PARTIAL_OBJECT,
541 static const uint16_t fmt[] = {
542 FMT_UNDEFINED_OBJECT,
545 MTPData *d = usb_mtp_data_alloc(c);
547 trace_usb_mtp_op_get_device_info(s->dev.addr);
549 usb_mtp_add_u16(d, 100);
550 usb_mtp_add_u32(d, 0xffffffff);
551 usb_mtp_add_u16(d, 0x0101);
552 usb_mtp_add_wstr(d, L"");
553 usb_mtp_add_u16(d, 0x0000);
555 usb_mtp_add_u16_array(d, ARRAY_SIZE(ops), ops);
556 usb_mtp_add_u16_array(d, 0, NULL);
557 usb_mtp_add_u16_array(d, 0, NULL);
558 usb_mtp_add_u16_array(d, 0, NULL);
559 usb_mtp_add_u16_array(d, ARRAY_SIZE(fmt), fmt);
561 usb_mtp_add_wstr(d, L"" MTP_MANUFACTURER);
562 usb_mtp_add_wstr(d, L"" MTP_PRODUCT);
563 usb_mtp_add_wstr(d, L"0.1");
564 usb_mtp_add_wstr(d, L"0123456789abcdef0123456789abcdef");
569 static MTPData *usb_mtp_get_storage_ids(MTPState *s, MTPControl *c)
571 static const uint32_t ids[] = {
574 MTPData *d = usb_mtp_data_alloc(c);
576 trace_usb_mtp_op_get_storage_ids(s->dev.addr);
578 usb_mtp_add_u32_array(d, ARRAY_SIZE(ids), ids);
583 static MTPData *usb_mtp_get_storage_info(MTPState *s, MTPControl *c)
585 MTPData *d = usb_mtp_data_alloc(c);
589 trace_usb_mtp_op_get_storage_info(s->dev.addr);
591 if (FLAG_SET(s, MTP_FLAG_WRITABLE)) {
592 usb_mtp_add_u16(d, 0x0003);
593 usb_mtp_add_u16(d, 0x0002);
594 usb_mtp_add_u16(d, 0x0000);
596 usb_mtp_add_u16(d, 0x0001);
597 usb_mtp_add_u16(d, 0x0002);
598 usb_mtp_add_u16(d, 0x0001);
601 rc = statvfs(s->root, &buf);
603 usb_mtp_add_u64(d, (uint64_t)buf.f_frsize * buf.f_blocks);
604 usb_mtp_add_u64(d, (uint64_t)buf.f_bavail * buf.f_blocks);
605 usb_mtp_add_u32(d, buf.f_ffree);
607 usb_mtp_add_u64(d, 0xffffffff);
608 usb_mtp_add_u64(d, 0xffffffff);
609 usb_mtp_add_u32(d, 0xffffffff);
612 usb_mtp_add_str(d, s->desc);
613 usb_mtp_add_wstr(d, L"123456789abcdef");
617 static MTPData *usb_mtp_get_object_handles(MTPState *s, MTPControl *c,
620 MTPData *d = usb_mtp_data_alloc(c);
621 uint32_t i, handles[o->nchildren];
623 trace_usb_mtp_op_get_object_handles(s->dev.addr, o->handle, o->path);
625 for (i = 0; i < o->nchildren; i++) {
626 handles[i] = o->children[i]->handle;
628 usb_mtp_add_u32_array(d, o->nchildren, handles);
633 static MTPData *usb_mtp_get_object_info(MTPState *s, MTPControl *c,
636 MTPData *d = usb_mtp_data_alloc(c);
638 trace_usb_mtp_op_get_object_info(s->dev.addr, o->handle, o->path);
640 usb_mtp_add_u32(d, QEMU_STORAGE_ID);
641 usb_mtp_add_u16(d, o->format);
642 usb_mtp_add_u16(d, 0);
643 usb_mtp_add_u32(d, o->stat.st_size);
645 usb_mtp_add_u16(d, 0);
646 usb_mtp_add_u32(d, 0);
647 usb_mtp_add_u32(d, 0);
648 usb_mtp_add_u32(d, 0);
649 usb_mtp_add_u32(d, 0);
650 usb_mtp_add_u32(d, 0);
651 usb_mtp_add_u32(d, 0);
654 usb_mtp_add_u32(d, o->parent->handle);
656 usb_mtp_add_u32(d, 0);
658 if (o->format == FMT_ASSOCIATION) {
659 usb_mtp_add_u16(d, 0x0001);
660 usb_mtp_add_u32(d, 0x00000001);
661 usb_mtp_add_u32(d, 0);
663 usb_mtp_add_u16(d, 0);
664 usb_mtp_add_u32(d, 0);
665 usb_mtp_add_u32(d, 0);
668 usb_mtp_add_str(d, o->name);
669 usb_mtp_add_time(d, o->stat.st_ctime);
670 usb_mtp_add_time(d, o->stat.st_mtime);
671 usb_mtp_add_wstr(d, L"");
676 static MTPData *usb_mtp_get_object(MTPState *s, MTPControl *c,
679 MTPData *d = usb_mtp_data_alloc(c);
681 trace_usb_mtp_op_get_object(s->dev.addr, o->handle, o->path);
683 d->fd = open(o->path, O_RDONLY);
685 usb_mtp_data_free(d);
688 d->length = o->stat.st_size;
690 d->data = g_malloc(d->alloc);
694 static MTPData *usb_mtp_get_partial_object(MTPState *s, MTPControl *c,
697 MTPData *d = usb_mtp_data_alloc(c);
700 trace_usb_mtp_op_get_partial_object(s->dev.addr, o->handle, o->path,
701 c->argv[1], c->argv[2]);
703 d->fd = open(o->path, O_RDONLY);
705 usb_mtp_data_free(d);
710 if (offset > o->stat.st_size) {
711 offset = o->stat.st_size;
713 if (lseek(d->fd, offset, SEEK_SET) < 0) {
714 usb_mtp_data_free(d);
718 d->length = c->argv[2];
719 if (d->length > o->stat.st_size - offset) {
720 d->length = o->stat.st_size - offset;
726 static void usb_mtp_command(MTPState *s, MTPControl *c)
728 MTPData *data_in = NULL;
730 uint32_t nres = 0, res0 = 0;
733 if (c->code >= CMD_CLOSE_SESSION && s->session == 0) {
734 usb_mtp_queue_result(s, RES_SESSION_NOT_OPEN,
739 /* process commands */
741 case CMD_GET_DEVICE_INFO:
742 data_in = usb_mtp_get_device_info(s, c);
744 case CMD_OPEN_SESSION:
746 usb_mtp_queue_result(s, RES_SESSION_ALREADY_OPEN,
747 c->trans, 1, s->session, 0);
750 if (c->argv[0] == 0) {
751 usb_mtp_queue_result(s, RES_INVALID_PARAMETER,
755 trace_usb_mtp_op_open_session(s->dev.addr);
756 s->session = c->argv[0];
757 usb_mtp_object_alloc(s, s->next_handle++, NULL, s->root);
759 case CMD_CLOSE_SESSION:
760 trace_usb_mtp_op_close_session(s->dev.addr);
763 usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects));
764 assert(QTAILQ_EMPTY(&s->objects));
766 case CMD_GET_STORAGE_IDS:
767 data_in = usb_mtp_get_storage_ids(s, c);
769 case CMD_GET_STORAGE_INFO:
770 if (c->argv[0] != QEMU_STORAGE_ID &&
771 c->argv[0] != 0xffffffff) {
772 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID,
776 data_in = usb_mtp_get_storage_info(s, c);
778 case CMD_GET_NUM_OBJECTS:
779 case CMD_GET_OBJECT_HANDLES:
780 if (c->argv[0] != QEMU_STORAGE_ID &&
781 c->argv[0] != 0xffffffff) {
782 usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID,
786 if (c->argv[1] != 0x00000000) {
787 usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED,
791 if (c->argv[2] == 0x00000000 ||
792 c->argv[2] == 0xffffffff) {
793 o = QTAILQ_FIRST(&s->objects);
795 o = usb_mtp_object_lookup(s, c->argv[2]);
798 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
802 if (o->format != FMT_ASSOCIATION) {
803 usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT,
807 usb_mtp_object_readdir(s, o);
808 if (c->code == CMD_GET_NUM_OBJECTS) {
809 trace_usb_mtp_op_get_num_objects(s->dev.addr, o->handle, o->path);
813 data_in = usb_mtp_get_object_handles(s, c, o);
816 case CMD_GET_OBJECT_INFO:
817 o = usb_mtp_object_lookup(s, c->argv[0]);
819 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
823 data_in = usb_mtp_get_object_info(s, c, o);
826 o = usb_mtp_object_lookup(s, c->argv[0]);
828 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
832 if (o->format == FMT_ASSOCIATION) {
833 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
837 data_in = usb_mtp_get_object(s, c, o);
838 if (data_in == NULL) {
839 usb_mtp_queue_result(s, RES_GENERAL_ERROR,
844 case CMD_GET_PARTIAL_OBJECT:
845 o = usb_mtp_object_lookup(s, c->argv[0]);
847 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
851 if (o->format == FMT_ASSOCIATION) {
852 usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE,
856 data_in = usb_mtp_get_partial_object(s, c, o);
857 if (data_in == NULL) {
858 usb_mtp_queue_result(s, RES_GENERAL_ERROR,
863 res0 = data_in->length;
866 trace_usb_mtp_op_unknown(s->dev.addr, c->code);
867 usb_mtp_queue_result(s, RES_OPERATION_NOT_SUPPORTED,
872 /* return results on success */
874 assert(s->data_in == NULL);
875 s->data_in = data_in;
877 usb_mtp_queue_result(s, RES_OK, c->trans, nres, res0, 0);
880 /* ----------------------------------------------------------------------- */
882 static void usb_mtp_handle_reset(USBDevice *dev)
884 MTPState *s = USB_MTP(dev);
886 trace_usb_mtp_reset(s->dev.addr);
889 usb_mtp_data_free(s->data_in);
891 usb_mtp_data_free(s->data_out);
897 static void usb_mtp_handle_control(USBDevice *dev, USBPacket *p,
898 int request, int value, int index,
899 int length, uint8_t *data)
903 ret = usb_desc_handle_control(dev, p, request, value, index, length, data);
908 trace_usb_mtp_stall(dev->addr, "unknown control request");
909 p->status = USB_RET_STALL;
912 static void usb_mtp_cancel_packet(USBDevice *dev, USBPacket *p)
914 /* we don't use async packets, so this should never be called */
915 fprintf(stderr, "%s\n", __func__);
918 static void usb_mtp_handle_data(USBDevice *dev, USBPacket *p)
920 MTPState *s = USB_MTP(dev);
922 mtp_container container;
928 if (s->data_out != NULL) {
930 trace_usb_mtp_stall(s->dev.addr, "awaiting data-out");
931 p->status = USB_RET_STALL;
934 if (p->iov.size < sizeof(container)) {
935 trace_usb_mtp_stall(s->dev.addr, "packet too small");
936 p->status = USB_RET_STALL;
939 if (s->data_in != NULL) {
940 MTPData *d = s->data_in;
941 int dlen = d->length - d->offset;
943 trace_usb_mtp_data_in(s->dev.addr, d->trans, d->length);
944 container.length = cpu_to_le32(d->length + sizeof(container));
945 container.type = cpu_to_le16(TYPE_DATA);
946 container.code = cpu_to_le16(d->code);
947 container.trans = cpu_to_le32(d->trans);
948 usb_packet_copy(p, &container, sizeof(container));
950 if (dlen > p->iov.size - sizeof(container)) {
951 dlen = p->iov.size - sizeof(container);
954 if (dlen > p->iov.size) {
959 usb_packet_copy(p, d->data + d->offset, dlen);
961 if (d->alloc < p->iov.size) {
962 d->alloc = p->iov.size;
963 d->data = g_realloc(d->data, d->alloc);
965 rc = read(d->fd, d->data, dlen);
967 memset(d->data, 0, dlen);
968 s->result->code = RES_INCOMPLETE_TRANSFER;
970 usb_packet_copy(p, d->data, dlen);
973 if (d->offset == d->length) {
974 usb_mtp_data_free(s->data_in);
977 } else if (s->result != NULL) {
978 MTPControl *r = s->result;
979 int length = sizeof(container) + r->argc * sizeof(uint32_t);
980 if (r->code == RES_OK) {
981 trace_usb_mtp_success(s->dev.addr, r->trans,
982 (r->argc > 0) ? r->argv[0] : 0,
983 (r->argc > 1) ? r->argv[1] : 0);
985 trace_usb_mtp_error(s->dev.addr, r->code, r->trans,
986 (r->argc > 0) ? r->argv[0] : 0,
987 (r->argc > 1) ? r->argv[1] : 0);
989 container.length = cpu_to_le32(length);
990 container.type = cpu_to_le16(TYPE_RESPONSE);
991 container.code = cpu_to_le16(r->code);
992 container.trans = cpu_to_le32(r->trans);
993 for (i = 0; i < r->argc; i++) {
994 params[i] = cpu_to_le32(r->argv[i]);
996 usb_packet_copy(p, &container, sizeof(container));
997 usb_packet_copy(p, ¶ms, length - sizeof(container));
1003 if (p->iov.size < sizeof(container)) {
1004 trace_usb_mtp_stall(s->dev.addr, "packet too small");
1005 p->status = USB_RET_STALL;
1008 usb_packet_copy(p, &container, sizeof(container));
1009 switch (le16_to_cpu(container.type)) {
1011 if (s->data_in || s->data_out || s->result) {
1012 trace_usb_mtp_stall(s->dev.addr, "transaction inflight");
1013 p->status = USB_RET_STALL;
1016 cmd.code = le16_to_cpu(container.code);
1017 cmd.argc = (le32_to_cpu(container.length) - sizeof(container))
1019 cmd.trans = le32_to_cpu(container.trans);
1020 if (cmd.argc > ARRAY_SIZE(cmd.argv)) {
1021 cmd.argc = ARRAY_SIZE(cmd.argv);
1023 if (p->iov.size < sizeof(container) + cmd.argc * sizeof(uint32_t)) {
1024 trace_usb_mtp_stall(s->dev.addr, "packet too small");
1025 p->status = USB_RET_STALL;
1028 usb_packet_copy(p, ¶ms, cmd.argc * sizeof(uint32_t));
1029 for (i = 0; i < cmd.argc; i++) {
1030 cmd.argv[i] = le32_to_cpu(params[i]);
1032 trace_usb_mtp_command(s->dev.addr, cmd.code, cmd.trans,
1033 (cmd.argc > 0) ? cmd.argv[0] : 0,
1034 (cmd.argc > 1) ? cmd.argv[1] : 0,
1035 (cmd.argc > 2) ? cmd.argv[2] : 0,
1036 (cmd.argc > 3) ? cmd.argv[3] : 0,
1037 (cmd.argc > 4) ? cmd.argv[4] : 0);
1038 usb_mtp_command(s, &cmd);
1041 /* not needed as long as the mtp device is read-only */
1042 p->status = USB_RET_STALL;
1047 p->status = USB_RET_NAK;
1050 trace_usb_mtp_stall(s->dev.addr, "invalid endpoint");
1051 p->status = USB_RET_STALL;
1055 if (p->actual_length == 0) {
1056 trace_usb_mtp_nak(s->dev.addr, p->ep->nr);
1057 p->status = USB_RET_NAK;
1060 trace_usb_mtp_xfer(s->dev.addr, p->ep->nr, p->actual_length,
1066 static void usb_mtp_realize(USBDevice *dev, Error **errp)
1068 MTPState *s = USB_MTP(dev);
1070 usb_desc_create_serial(dev);
1072 QTAILQ_INIT(&s->objects);
1073 if (s->desc == NULL) {
1074 if (s->root == NULL) {
1075 error_setg(errp, "usb-mtp: x-root property must be configured");
1078 s->desc = strrchr(s->root, '/');
1079 if (s->desc && s->desc[0]) {
1080 s->desc = g_strdup(s->desc + 1);
1082 s->desc = g_strdup("none");
1087 static const VMStateDescription vmstate_usb_mtp = {
1091 .minimum_version_id = 1,
1092 .fields = (VMStateField[]) {
1093 VMSTATE_USB_DEVICE(dev, MTPState),
1094 VMSTATE_END_OF_LIST()
1098 static Property mtp_properties[] = {
1099 DEFINE_PROP_STRING("x-root", MTPState, root),
1100 DEFINE_PROP_STRING("desc", MTPState, desc),
1101 DEFINE_PROP_END_OF_LIST(),
1104 static void usb_mtp_class_initfn(ObjectClass *klass, void *data)
1106 DeviceClass *dc = DEVICE_CLASS(klass);
1107 USBDeviceClass *uc = USB_DEVICE_CLASS(klass);
1109 uc->realize = usb_mtp_realize;
1110 uc->product_desc = "QEMU USB MTP";
1111 uc->usb_desc = &desc;
1112 uc->cancel_packet = usb_mtp_cancel_packet;
1113 uc->handle_attach = usb_desc_attach;
1114 uc->handle_reset = usb_mtp_handle_reset;
1115 uc->handle_control = usb_mtp_handle_control;
1116 uc->handle_data = usb_mtp_handle_data;
1117 dc->fw_name = "mtp";
1118 dc->vmsd = &vmstate_usb_mtp;
1119 dc->props = mtp_properties;
1122 static TypeInfo mtp_info = {
1123 .name = TYPE_USB_MTP,
1124 .parent = TYPE_USB_DEVICE,
1125 .instance_size = sizeof(MTPState),
1126 .class_init = usb_mtp_class_initfn,
1129 static void usb_mtp_register_types(void)
1131 type_register_static(&mtp_info);
1134 type_init(usb_mtp_register_types)