/* * Media Transfer Protocol implementation, backed by host filesystem. * * Copyright Red Hat, Inc 2014 * * Author: * Gerd Hoffmann <kraxel@redhat.com> * * This code is licensed under the GPL v2 or later. */ #include <wchar.h> #include <dirent.h> #include <unistd.h> #include <sys/stat.h> #include <sys/statvfs.h> #include "qemu-common.h" #include "qemu/iov.h" #include "trace.h" #include "hw/usb.h" #include "hw/usb/desc.h" /* ----------------------------------------------------------------------- */ enum mtp_container_type { TYPE_COMMAND = 1, TYPE_DATA = 2, TYPE_RESPONSE = 3, TYPE_EVENT = 4, }; enum mtp_code { /* command codes */ CMD_GET_DEVICE_INFO = 0x1001, CMD_OPEN_SESSION = 0x1002, CMD_CLOSE_SESSION = 0x1003, CMD_GET_STORAGE_IDS = 0x1004, CMD_GET_STORAGE_INFO = 0x1005, CMD_GET_NUM_OBJECTS = 0x1006, CMD_GET_OBJECT_HANDLES = 0x1007, CMD_GET_OBJECT_INFO = 0x1008, CMD_GET_OBJECT = 0x1009, CMD_GET_PARTIAL_OBJECT = 0x101b, /* response codes */ RES_OK = 0x2001, RES_GENERAL_ERROR = 0x2002, RES_SESSION_NOT_OPEN = 0x2003, RES_INVALID_TRANSACTION_ID = 0x2004, RES_OPERATION_NOT_SUPPORTED = 0x2005, RES_PARAMETER_NOT_SUPPORTED = 0x2006, RES_INCOMPLETE_TRANSFER = 0x2007, RES_INVALID_STORAGE_ID = 0x2008, RES_INVALID_OBJECT_HANDLE = 0x2009, RES_SPEC_BY_FORMAT_UNSUPPORTED = 0x2014, RES_INVALID_PARENT_OBJECT = 0x201a, RES_INVALID_PARAMETER = 0x201d, RES_SESSION_ALREADY_OPEN = 0x201e, /* format codes */ FMT_UNDEFINED_OBJECT = 0x3000, FMT_ASSOCIATION = 0x3001, }; typedef struct { uint32_t length; uint16_t type; uint16_t code; uint32_t trans; } QEMU_PACKED mtp_container; /* ----------------------------------------------------------------------- */ typedef struct MTPState MTPState; typedef struct MTPControl MTPControl; typedef struct MTPData MTPData; typedef struct MTPObject MTPObject; enum { EP_DATA_IN = 1, EP_DATA_OUT, EP_EVENT, }; struct MTPControl { uint16_t code; uint32_t trans; int argc; uint32_t argv[5]; }; struct MTPData { uint16_t code; uint32_t trans; uint32_t offset; uint32_t length; uint32_t alloc; uint8_t *data; bool first; int fd; }; struct MTPObject { uint32_t handle; uint16_t format; char *name; char *path; struct stat stat; MTPObject *parent; MTPObject **children; uint32_t nchildren; bool have_children; QTAILQ_ENTRY(MTPObject) next; }; struct MTPState { USBDevice dev; char *root; char *desc; uint32_t flags; MTPData *data_in; MTPData *data_out; MTPControl *result; uint32_t session; uint32_t next_handle; QTAILQ_HEAD(, MTPObject) objects; }; #define QEMU_STORAGE_ID 0x00010001 #define MTP_FLAG_WRITABLE 0 #define FLAG_SET(_mtp, _flag) ((_mtp)->flags & (1 << (_flag))) /* ----------------------------------------------------------------------- */ #define MTP_MANUFACTURER "QEMU" #define MTP_PRODUCT "QEMU filesharing" enum { STR_MANUFACTURER = 1, STR_PRODUCT, STR_SERIALNUMBER, STR_CONFIG_FULL, STR_CONFIG_HIGH, STR_CONFIG_SUPER, }; static const USBDescStrings desc_strings = { [STR_MANUFACTURER] = MTP_MANUFACTURER, [STR_PRODUCT] = MTP_PRODUCT, [STR_SERIALNUMBER] = "34617", [STR_CONFIG_FULL] = "Full speed config (usb 1.1)", [STR_CONFIG_HIGH] = "High speed config (usb 2.0)", [STR_CONFIG_SUPER] = "Super speed config (usb 3.0)", }; static const USBDescIface desc_iface_full = { .bInterfaceNumber = 0, .bNumEndpoints = 3, .bInterfaceClass = USB_CLASS_STILL_IMAGE, .bInterfaceSubClass = 0x01, .bInterfaceProtocol = 0x01, .eps = (USBDescEndpoint[]) { { .bEndpointAddress = USB_DIR_IN | EP_DATA_IN, .bmAttributes = USB_ENDPOINT_XFER_BULK, .wMaxPacketSize = 64, },{ .bEndpointAddress = USB_DIR_OUT | EP_DATA_OUT, .bmAttributes = USB_ENDPOINT_XFER_BULK, .wMaxPacketSize = 64, },{ .bEndpointAddress = USB_DIR_IN | EP_EVENT, .bmAttributes = USB_ENDPOINT_XFER_INT, .wMaxPacketSize = 8, .bInterval = 0x0a, }, } }; static const USBDescDevice desc_device_full = { .bcdUSB = 0x0200, .bMaxPacketSize0 = 8, .bNumConfigurations = 1, .confs = (USBDescConfig[]) { { .bNumInterfaces = 1, .bConfigurationValue = 1, .iConfiguration = STR_CONFIG_FULL, .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP, .bMaxPower = 2, .nif = 1, .ifs = &desc_iface_full, }, }, }; static const USBDescIface desc_iface_high = { .bInterfaceNumber = 0, .bNumEndpoints = 3, .bInterfaceClass = USB_CLASS_STILL_IMAGE, .bInterfaceSubClass = 0x01, .bInterfaceProtocol = 0x01, .eps = (USBDescEndpoint[]) { { .bEndpointAddress = USB_DIR_IN | EP_DATA_IN, .bmAttributes = USB_ENDPOINT_XFER_BULK, .wMaxPacketSize = 512, },{ .bEndpointAddress = USB_DIR_OUT | EP_DATA_OUT, .bmAttributes = USB_ENDPOINT_XFER_BULK, .wMaxPacketSize = 512, },{ .bEndpointAddress = USB_DIR_IN | EP_EVENT, .bmAttributes = USB_ENDPOINT_XFER_INT, .wMaxPacketSize = 8, .bInterval = 0x0a, }, } }; static const USBDescDevice desc_device_high = { .bcdUSB = 0x0200, .bMaxPacketSize0 = 64, .bNumConfigurations = 1, .confs = (USBDescConfig[]) { { .bNumInterfaces = 1, .bConfigurationValue = 1, .iConfiguration = STR_CONFIG_HIGH, .bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP, .bMaxPower = 2, .nif = 1, .ifs = &desc_iface_high, }, }, }; static const USBDescMSOS desc_msos = { .CompatibleID = "MTP", .SelectiveSuspendEnabled = true, }; static const USBDesc desc = { .id = { .idVendor = 0x46f4, /* CRC16() of "QEMU" */ .idProduct = 0x0004, .bcdDevice = 0, .iManufacturer = STR_MANUFACTURER, .iProduct = STR_PRODUCT, .iSerialNumber = STR_SERIALNUMBER, }, .full = &desc_device_full, .high = &desc_device_high, .str = desc_strings, .msos = &desc_msos, }; /* ----------------------------------------------------------------------- */ static MTPObject *usb_mtp_object_alloc(MTPState *s, uint32_t handle, MTPObject *parent, char *name) { MTPObject *o = g_new0(MTPObject, 1); if (name[0] == '.') { goto ignore; } o->handle = handle; o->parent = parent; o->name = g_strdup(name); if (parent == NULL) { o->path = g_strdup(name); } else { o->path = g_strdup_printf("%s/%s", parent->path, name); } if (lstat(o->path, &o->stat) != 0) { goto ignore; } if (S_ISREG(o->stat.st_mode)) { o->format = FMT_UNDEFINED_OBJECT; } else if (S_ISDIR(o->stat.st_mode)) { o->format = FMT_ASSOCIATION; } else { goto ignore; } if (access(o->path, R_OK) != 0) { goto ignore; } trace_usb_mtp_object_alloc(s->dev.addr, o->handle, o->path); QTAILQ_INSERT_TAIL(&s->objects, o, next); return o; ignore: g_free(o->name); g_free(o->path); g_free(o); return NULL; } static void usb_mtp_object_free(MTPState *s, MTPObject *o) { int i; trace_usb_mtp_object_free(s->dev.addr, o->handle, o->path); QTAILQ_REMOVE(&s->objects, o, next); for (i = 0; i < o->nchildren; i++) { usb_mtp_object_free(s, o->children[i]); } g_free(o->children); g_free(o->name); g_free(o->path); g_free(o); } static MTPObject *usb_mtp_object_lookup(MTPState *s, uint32_t handle) { MTPObject *o; QTAILQ_FOREACH(o, &s->objects, next) { if (o->handle == handle) { return o; } } return NULL; } static void usb_mtp_object_readdir(MTPState *s, MTPObject *o) { struct dirent *entry; DIR *dir; if (o->have_children) { return; } o->have_children = true; dir = opendir(o->path); if (!dir) { return; } while ((entry = readdir(dir)) != NULL) { if ((o->nchildren % 32) == 0) { o->children = g_realloc(o->children, (o->nchildren + 32) * sizeof(MTPObject *)); } o->children[o->nchildren] = usb_mtp_object_alloc(s, s->next_handle++, o, entry->d_name); if (o->children[o->nchildren] != NULL) { o->nchildren++; } } closedir(dir); } /* ----------------------------------------------------------------------- */ static MTPData *usb_mtp_data_alloc(MTPControl *c) { MTPData *data = g_new0(MTPData, 1); data->code = c->code; data->trans = c->trans; data->fd = -1; data->first = true; return data; } static void usb_mtp_data_free(MTPData *data) { if (data == NULL) { return; } if (data->fd != -1) { close(data->fd); } g_free(data->data); g_free(data); } static void usb_mtp_realloc(MTPData *data, uint32_t bytes) { if (data->length + bytes <= data->alloc) { return; } data->alloc = (data->length + bytes + 0xff) & ~0xff; data->data = g_realloc(data->data, data->alloc); } static void usb_mtp_add_u8(MTPData *data, uint8_t val) { usb_mtp_realloc(data, 1); data->data[data->length++] = val; } static void usb_mtp_add_u16(MTPData *data, uint16_t val) { usb_mtp_realloc(data, 2); data->data[data->length++] = (val >> 0) & 0xff; data->data[data->length++] = (val >> 8) & 0xff; } static void usb_mtp_add_u32(MTPData *data, uint32_t val) { usb_mtp_realloc(data, 4); data->data[data->length++] = (val >> 0) & 0xff; data->data[data->length++] = (val >> 8) & 0xff; data->data[data->length++] = (val >> 16) & 0xff; data->data[data->length++] = (val >> 24) & 0xff; } static void usb_mtp_add_u64(MTPData *data, uint64_t val) { usb_mtp_realloc(data, 8); data->data[data->length++] = (val >> 0) & 0xff; data->data[data->length++] = (val >> 8) & 0xff; data->data[data->length++] = (val >> 16) & 0xff; data->data[data->length++] = (val >> 24) & 0xff; data->data[data->length++] = (val >> 32) & 0xff; data->data[data->length++] = (val >> 40) & 0xff; data->data[data->length++] = (val >> 48) & 0xff; data->data[data->length++] = (val >> 56) & 0xff; } static void usb_mtp_add_u16_array(MTPData *data, uint32_t len, const uint16_t *vals) { int i; usb_mtp_add_u32(data, len); for (i = 0; i < len; i++) { usb_mtp_add_u16(data, vals[i]); } } static void usb_mtp_add_u32_array(MTPData *data, uint32_t len, const uint32_t *vals) { int i; usb_mtp_add_u32(data, len); for (i = 0; i < len; i++) { usb_mtp_add_u32(data, vals[i]); } } static void usb_mtp_add_wstr(MTPData *data, const wchar_t *str) { uint32_t len = wcslen(str); int i; if (len > 0) { len++; /* include terminating L'\0' */ } usb_mtp_add_u8(data, len); for (i = 0; i < len; i++) { usb_mtp_add_u16(data, str[i]); } } static void usb_mtp_add_str(MTPData *data, const char *str) { uint32_t len = strlen(str)+1; wchar_t wstr[len]; size_t ret; ret = mbstowcs(wstr, str, len); if (ret == -1) { usb_mtp_add_wstr(data, L"Oops"); } else { usb_mtp_add_wstr(data, wstr); } } static void usb_mtp_add_time(MTPData *data, time_t time) { char buf[16]; struct tm tm; gmtime_r(&time, &tm); strftime(buf, sizeof(buf), "%Y%m%dT%H%M%S", &tm); usb_mtp_add_str(data, buf); } /* ----------------------------------------------------------------------- */ static void usb_mtp_queue_result(MTPState *s, uint16_t code, uint32_t trans, int argc, uint32_t arg0, uint32_t arg1) { MTPControl *c = g_new0(MTPControl, 1); c->code = code; c->trans = trans; c->argc = argc; if (argc > 0) { c->argv[0] = arg0; } if (argc > 1) { c->argv[1] = arg1; } assert(s->result == NULL); s->result = c; } /* ----------------------------------------------------------------------- */ static MTPData *usb_mtp_get_device_info(MTPState *s, MTPControl *c) { static const uint16_t ops[] = { CMD_GET_DEVICE_INFO, CMD_OPEN_SESSION, CMD_CLOSE_SESSION, CMD_GET_STORAGE_IDS, CMD_GET_STORAGE_INFO, CMD_GET_NUM_OBJECTS, CMD_GET_OBJECT_HANDLES, CMD_GET_OBJECT_INFO, CMD_GET_OBJECT, CMD_GET_PARTIAL_OBJECT, }; static const uint16_t fmt[] = { FMT_UNDEFINED_OBJECT, FMT_ASSOCIATION, }; MTPData *d = usb_mtp_data_alloc(c); trace_usb_mtp_op_get_device_info(s->dev.addr); usb_mtp_add_u16(d, 100); usb_mtp_add_u32(d, 0xffffffff); usb_mtp_add_u16(d, 0x0101); usb_mtp_add_wstr(d, L""); usb_mtp_add_u16(d, 0x0000); usb_mtp_add_u16_array(d, ARRAY_SIZE(ops), ops); usb_mtp_add_u16_array(d, 0, NULL); usb_mtp_add_u16_array(d, 0, NULL); usb_mtp_add_u16_array(d, 0, NULL); usb_mtp_add_u16_array(d, ARRAY_SIZE(fmt), fmt); usb_mtp_add_wstr(d, L"" MTP_MANUFACTURER); usb_mtp_add_wstr(d, L"" MTP_PRODUCT); usb_mtp_add_wstr(d, L"0.1"); usb_mtp_add_wstr(d, L"0123456789abcdef0123456789abcdef"); return d; } static MTPData *usb_mtp_get_storage_ids(MTPState *s, MTPControl *c) { static const uint32_t ids[] = { QEMU_STORAGE_ID, }; MTPData *d = usb_mtp_data_alloc(c); trace_usb_mtp_op_get_storage_ids(s->dev.addr); usb_mtp_add_u32_array(d, ARRAY_SIZE(ids), ids); return d; } static MTPData *usb_mtp_get_storage_info(MTPState *s, MTPControl *c) { MTPData *d = usb_mtp_data_alloc(c); struct statvfs buf; int rc; trace_usb_mtp_op_get_storage_info(s->dev.addr); if (FLAG_SET(s, MTP_FLAG_WRITABLE)) { usb_mtp_add_u16(d, 0x0003); usb_mtp_add_u16(d, 0x0002); usb_mtp_add_u16(d, 0x0000); } else { usb_mtp_add_u16(d, 0x0001); usb_mtp_add_u16(d, 0x0002); usb_mtp_add_u16(d, 0x0001); } rc = statvfs(s->root, &buf); if (rc == 0) { usb_mtp_add_u64(d, (uint64_t)buf.f_frsize * buf.f_blocks); usb_mtp_add_u64(d, (uint64_t)buf.f_bavail * buf.f_blocks); usb_mtp_add_u32(d, buf.f_ffree); } else { usb_mtp_add_u64(d, 0xffffffff); usb_mtp_add_u64(d, 0xffffffff); usb_mtp_add_u32(d, 0xffffffff); } usb_mtp_add_str(d, s->desc); usb_mtp_add_wstr(d, L"123456789abcdef"); return d; } static MTPData *usb_mtp_get_object_handles(MTPState *s, MTPControl *c, MTPObject *o) { MTPData *d = usb_mtp_data_alloc(c); uint32_t i, handles[o->nchildren]; trace_usb_mtp_op_get_object_handles(s->dev.addr, o->handle, o->path); for (i = 0; i < o->nchildren; i++) { handles[i] = o->children[i]->handle; } usb_mtp_add_u32_array(d, o->nchildren, handles); return d; } static MTPData *usb_mtp_get_object_info(MTPState *s, MTPControl *c, MTPObject *o) { MTPData *d = usb_mtp_data_alloc(c); trace_usb_mtp_op_get_object_info(s->dev.addr, o->handle, o->path); usb_mtp_add_u32(d, QEMU_STORAGE_ID); usb_mtp_add_u16(d, o->format); usb_mtp_add_u16(d, 0); usb_mtp_add_u32(d, o->stat.st_size); usb_mtp_add_u16(d, 0); usb_mtp_add_u32(d, 0); usb_mtp_add_u32(d, 0); usb_mtp_add_u32(d, 0); usb_mtp_add_u32(d, 0); usb_mtp_add_u32(d, 0); usb_mtp_add_u32(d, 0); if (o->parent) { usb_mtp_add_u32(d, o->parent->handle); } else { usb_mtp_add_u32(d, 0); } if (o->format == FMT_ASSOCIATION) { usb_mtp_add_u16(d, 0x0001); usb_mtp_add_u32(d, 0x00000001); usb_mtp_add_u32(d, 0); } else { usb_mtp_add_u16(d, 0); usb_mtp_add_u32(d, 0); usb_mtp_add_u32(d, 0); } usb_mtp_add_str(d, o->name); usb_mtp_add_time(d, o->stat.st_ctime); usb_mtp_add_time(d, o->stat.st_mtime); usb_mtp_add_wstr(d, L""); return d; } static MTPData *usb_mtp_get_object(MTPState *s, MTPControl *c, MTPObject *o) { MTPData *d = usb_mtp_data_alloc(c); trace_usb_mtp_op_get_object(s->dev.addr, o->handle, o->path); d->fd = open(o->path, O_RDONLY); if (d->fd == -1) { usb_mtp_data_free(d); return NULL; } d->length = o->stat.st_size; d->alloc = 512; d->data = g_malloc(d->alloc); return d; } static MTPData *usb_mtp_get_partial_object(MTPState *s, MTPControl *c, MTPObject *o) { MTPData *d = usb_mtp_data_alloc(c); off_t offset; trace_usb_mtp_op_get_partial_object(s->dev.addr, o->handle, o->path, c->argv[1], c->argv[2]); d->fd = open(o->path, O_RDONLY); if (d->fd == -1) { usb_mtp_data_free(d); return NULL; } offset = c->argv[1]; if (offset > o->stat.st_size) { offset = o->stat.st_size; } if (lseek(d->fd, offset, SEEK_SET) < 0) { usb_mtp_data_free(d); return NULL; } d->length = c->argv[2]; if (d->length > o->stat.st_size - offset) { d->length = o->stat.st_size - offset; } return d; } static void usb_mtp_command(MTPState *s, MTPControl *c) { MTPData *data_in = NULL; MTPObject *o; uint32_t nres = 0, res0 = 0; /* sanity checks */ if (c->code >= CMD_CLOSE_SESSION && s->session == 0) { usb_mtp_queue_result(s, RES_SESSION_NOT_OPEN, c->trans, 0, 0, 0); return; } /* process commands */ switch (c->code) { case CMD_GET_DEVICE_INFO: data_in = usb_mtp_get_device_info(s, c); break; case CMD_OPEN_SESSION: if (s->session) { usb_mtp_queue_result(s, RES_SESSION_ALREADY_OPEN, c->trans, 1, s->session, 0); return; } if (c->argv[0] == 0) { usb_mtp_queue_result(s, RES_INVALID_PARAMETER, c->trans, 0, 0, 0); return; } trace_usb_mtp_op_open_session(s->dev.addr); s->session = c->argv[0]; usb_mtp_object_alloc(s, s->next_handle++, NULL, s->root); break; case CMD_CLOSE_SESSION: trace_usb_mtp_op_close_session(s->dev.addr); s->session = 0; s->next_handle = 0; usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects)); assert(QTAILQ_EMPTY(&s->objects)); break; case CMD_GET_STORAGE_IDS: data_in = usb_mtp_get_storage_ids(s, c); break; case CMD_GET_STORAGE_INFO: if (c->argv[0] != QEMU_STORAGE_ID && c->argv[0] != 0xffffffff) { usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID, c->trans, 0, 0, 0); return; } data_in = usb_mtp_get_storage_info(s, c); break; case CMD_GET_NUM_OBJECTS: case CMD_GET_OBJECT_HANDLES: if (c->argv[0] != QEMU_STORAGE_ID && c->argv[0] != 0xffffffff) { usb_mtp_queue_result(s, RES_INVALID_STORAGE_ID, c->trans, 0, 0, 0); return; } if (c->argv[1] != 0x00000000) { usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED, c->trans, 0, 0, 0); return; } if (c->argv[2] == 0x00000000 || c->argv[2] == 0xffffffff) { o = QTAILQ_FIRST(&s->objects); } else { o = usb_mtp_object_lookup(s, c->argv[2]); } if (o == NULL) { usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, c->trans, 0, 0, 0); return; } if (o->format != FMT_ASSOCIATION) { usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT, c->trans, 0, 0, 0); return; } usb_mtp_object_readdir(s, o); if (c->code == CMD_GET_NUM_OBJECTS) { trace_usb_mtp_op_get_num_objects(s->dev.addr, o->handle, o->path); nres = 1; res0 = o->nchildren; } else { data_in = usb_mtp_get_object_handles(s, c, o); } break; case CMD_GET_OBJECT_INFO: o = usb_mtp_object_lookup(s, c->argv[0]); if (o == NULL) { usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, c->trans, 0, 0, 0); return; } data_in = usb_mtp_get_object_info(s, c, o); break; case CMD_GET_OBJECT: o = usb_mtp_object_lookup(s, c->argv[0]); if (o == NULL) { usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, c->trans, 0, 0, 0); return; } if (o->format == FMT_ASSOCIATION) { usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, c->trans, 0, 0, 0); return; } data_in = usb_mtp_get_object(s, c, o); if (NULL == data_in) { usb_mtp_queue_result(s, RES_GENERAL_ERROR, c->trans, 0, 0, 0); return; } break; case CMD_GET_PARTIAL_OBJECT: o = usb_mtp_object_lookup(s, c->argv[0]); if (o == NULL) { usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, c->trans, 0, 0, 0); return; } if (o->format == FMT_ASSOCIATION) { usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, c->trans, 0, 0, 0); return; } data_in = usb_mtp_get_partial_object(s, c, o); if (NULL == data_in) { usb_mtp_queue_result(s, RES_GENERAL_ERROR, c->trans, 0, 0, 0); return; } nres = 1; res0 = data_in->length; break; default: trace_usb_mtp_op_unknown(s->dev.addr, c->code); usb_mtp_queue_result(s, RES_OPERATION_NOT_SUPPORTED, c->trans, 0, 0, 0); return; } /* return results on success */ if (data_in) { assert(s->data_in == NULL); s->data_in = data_in; } usb_mtp_queue_result(s, RES_OK, c->trans, nres, res0, 0); } /* ----------------------------------------------------------------------- */ static void usb_mtp_handle_reset(USBDevice *dev) { MTPState *s = DO_UPCAST(MTPState, dev, dev); trace_usb_mtp_reset(s->dev.addr); s->session = 0; usb_mtp_data_free(s->data_in); s->data_in = NULL; usb_mtp_data_free(s->data_out); s->data_out = NULL; g_free(s->result); s->result = NULL; } static void usb_mtp_handle_control(USBDevice *dev, USBPacket *p, int request, int value, int index, int length, uint8_t *data) { int ret; ret = usb_desc_handle_control(dev, p, request, value, index, length, data); if (ret >= 0) { return; } trace_usb_mtp_stall(dev->addr, "unknown control request"); p->status = USB_RET_STALL; } static void usb_mtp_cancel_packet(USBDevice *dev, USBPacket *p) { /* we don't use async packets, so this should never be called */ fprintf(stderr, "%s\n", __func__); } static void usb_mtp_handle_data(USBDevice *dev, USBPacket *p) { MTPState *s = DO_UPCAST(MTPState, dev, dev); MTPControl cmd; mtp_container container; uint32_t params[5]; int i, rc; switch (p->ep->nr) { case EP_DATA_IN: if (s->data_out != NULL) { /* guest bug */ trace_usb_mtp_stall(s->dev.addr, "awaiting data-out"); p->status = USB_RET_STALL; return; } if (p->iov.size < sizeof(container)) { trace_usb_mtp_stall(s->dev.addr, "packet too small"); p->status = USB_RET_STALL; return; } if (s->data_in != NULL) { MTPData *d = s->data_in; int dlen = d->length - d->offset; if (d->first) { trace_usb_mtp_data_in(s->dev.addr, d->trans, d->length); container.length = cpu_to_le32(d->length + sizeof(container)); container.type = cpu_to_le16(TYPE_DATA); container.code = cpu_to_le16(d->code); container.trans = cpu_to_le32(d->trans); usb_packet_copy(p, &container, sizeof(container)); d->first = false; if (dlen > p->iov.size - sizeof(container)) { dlen = p->iov.size - sizeof(container); } } else { if (dlen > p->iov.size) { dlen = p->iov.size; } } if (d->fd == -1) { usb_packet_copy(p, d->data + d->offset, dlen); } else { if (d->alloc < p->iov.size) { d->alloc = p->iov.size; d->data = g_realloc(d->data, d->alloc); } rc = read(d->fd, d->data, dlen); if (rc != dlen) { memset(d->data, 0, dlen); s->result->code = RES_INCOMPLETE_TRANSFER; } usb_packet_copy(p, d->data, dlen); } d->offset += dlen; if (d->offset == d->length) { usb_mtp_data_free(s->data_in); s->data_in = NULL; } } else if (s->result != NULL) { MTPControl *r = s->result; int length = sizeof(container) + r->argc * sizeof(uint32_t); if (r->code == RES_OK) { trace_usb_mtp_success(s->dev.addr, r->trans, (r->argc > 0) ? r->argv[0] : 0, (r->argc > 1) ? r->argv[1] : 0); } else { trace_usb_mtp_error(s->dev.addr, r->code, r->trans, (r->argc > 0) ? r->argv[0] : 0, (r->argc > 1) ? r->argv[1] : 0); } container.length = cpu_to_le32(length); container.type = cpu_to_le16(TYPE_RESPONSE); container.code = cpu_to_le16(r->code); container.trans = cpu_to_le32(r->trans); for (i = 0; i < r->argc; i++) { params[i] = cpu_to_le32(r->argv[i]); } usb_packet_copy(p, &container, sizeof(container)); usb_packet_copy(p, ¶ms, length - sizeof(container)); g_free(s->result); s->result = NULL; } break; case EP_DATA_OUT: if (p->iov.size < sizeof(container)) { trace_usb_mtp_stall(s->dev.addr, "packet too small"); p->status = USB_RET_STALL; return; } usb_packet_copy(p, &container, sizeof(container)); switch (le16_to_cpu(container.type)) { case TYPE_COMMAND: if (s->data_in || s->data_out || s->result) { trace_usb_mtp_stall(s->dev.addr, "transaction inflight"); p->status = USB_RET_STALL; return; } cmd.code = le16_to_cpu(container.code); cmd.argc = (le32_to_cpu(container.length) - sizeof(container)) / sizeof(uint32_t); cmd.trans = le32_to_cpu(container.trans); if (cmd.argc > ARRAY_SIZE(cmd.argv)) { cmd.argc = ARRAY_SIZE(cmd.argv); } if (p->iov.size < sizeof(container) + cmd.argc * sizeof(uint32_t)) { trace_usb_mtp_stall(s->dev.addr, "packet too small"); p->status = USB_RET_STALL; return; } usb_packet_copy(p, ¶ms, cmd.argc * sizeof(uint32_t)); for (i = 0; i < cmd.argc; i++) { cmd.argv[i] = le32_to_cpu(params[i]); } trace_usb_mtp_command(s->dev.addr, cmd.code, cmd.trans, (cmd.argc > 0) ? cmd.argv[0] : 0, (cmd.argc > 1) ? cmd.argv[1] : 0, (cmd.argc > 2) ? cmd.argv[2] : 0, (cmd.argc > 3) ? cmd.argv[3] : 0, (cmd.argc > 4) ? cmd.argv[4] : 0); usb_mtp_command(s, &cmd); break; default: /* not needed as long as the mtp device is read-only */ p->status = USB_RET_STALL; return; } break; case EP_EVENT: p->status = USB_RET_NAK; return; default: trace_usb_mtp_stall(s->dev.addr, "invalid endpoint"); p->status = USB_RET_STALL; return; } if (p->actual_length == 0) { trace_usb_mtp_nak(s->dev.addr, p->ep->nr); p->status = USB_RET_NAK; return; } else { trace_usb_mtp_xfer(s->dev.addr, p->ep->nr, p->actual_length, p->iov.size); return; } } static int usb_mtp_initfn(USBDevice *dev) { MTPState *s = DO_UPCAST(MTPState, dev, dev); usb_desc_create_serial(dev); usb_desc_init(dev); QTAILQ_INIT(&s->objects); if (s->desc == NULL) { s->desc = strrchr(s->root, '/'); if (s->desc && s->desc[0]) { s->desc = g_strdup(s->desc + 1); } else { s->desc = g_strdup("none"); } } return 0; } static const VMStateDescription vmstate_usb_mtp = { .name = "usb-mtp", .unmigratable = 1, .version_id = 1, .minimum_version_id = 1, .fields = (VMStateField[]) { VMSTATE_USB_DEVICE(dev, MTPState), VMSTATE_END_OF_LIST() } }; static Property mtp_properties[] = { DEFINE_PROP_STRING("root", MTPState, root), DEFINE_PROP_STRING("desc", MTPState, desc), DEFINE_PROP_END_OF_LIST(), }; static void usb_mtp_class_initfn(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); USBDeviceClass *uc = USB_DEVICE_CLASS(klass); uc->init = usb_mtp_initfn; uc->product_desc = "QEMU USB MTP"; uc->usb_desc = &desc; uc->cancel_packet = usb_mtp_cancel_packet; uc->handle_attach = usb_desc_attach; uc->handle_reset = usb_mtp_handle_reset; uc->handle_control = usb_mtp_handle_control; uc->handle_data = usb_mtp_handle_data; dc->fw_name = "mtp"; dc->vmsd = &vmstate_usb_mtp; dc->props = mtp_properties; } static TypeInfo mtp_info = { .name = "usb-mtp", .parent = TYPE_USB_DEVICE, .instance_size = sizeof(MTPState), .class_init = usb_mtp_class_initfn, }; static void usb_mtp_register_types(void) { type_register_static(&mtp_info); } type_init(usb_mtp_register_types)