/* * Media Transfer Protocol implementation, backed by host filesystem. * * Copyright Red Hat, Inc 2014 * * Author: * Gerd Hoffmann * * This code is licensed under the GPL v2 or later. */ #include "qemu/osdep.h" #include "qemu-common.h" #include "qapi/error.h" #include "qemu/error-report.h" #include #include #include #include "qemu/iov.h" #include "qemu/module.h" #include "qemu/filemonitor.h" #include "trace.h" #include "hw/qdev-properties.h" #include "hw/usb.h" #include "migration/vmstate.h" #include "desc.h" #include "qemu/units.h" /* ----------------------------------------------------------------------- */ enum mtp_container_type { TYPE_COMMAND = 1, TYPE_DATA = 2, TYPE_RESPONSE = 3, TYPE_EVENT = 4, }; /* MTP write stage, for internal use only */ enum mtp_write_status { WRITE_START = 1, WRITE_CONTINUE = 2, WRITE_END = 3, }; 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_DELETE_OBJECT = 0x100b, CMD_SEND_OBJECT_INFO = 0x100c, CMD_SEND_OBJECT = 0x100d, CMD_GET_PARTIAL_OBJECT = 0x101b, CMD_GET_OBJECT_PROPS_SUPPORTED = 0x9801, CMD_GET_OBJECT_PROP_DESC = 0x9802, CMD_GET_OBJECT_PROP_VALUE = 0x9803, /* 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_INVALID_OBJECT_FORMAT_CODE = 0x200b, RES_STORE_FULL = 0x200c, RES_STORE_READ_ONLY = 0x200e, RES_PARTIAL_DELETE = 0x2012, RES_STORE_NOT_AVAILABLE = 0x2013, RES_SPEC_BY_FORMAT_UNSUPPORTED = 0x2014, RES_INVALID_OBJECTINFO = 0x2015, RES_DESTINATION_UNSUPPORTED = 0x2020, RES_INVALID_PARENT_OBJECT = 0x201a, RES_INVALID_PARAMETER = 0x201d, RES_SESSION_ALREADY_OPEN = 0x201e, RES_INVALID_OBJECT_PROP_CODE = 0xA801, /* format codes */ FMT_UNDEFINED_OBJECT = 0x3000, FMT_ASSOCIATION = 0x3001, /* event codes */ EVT_CANCEL_TRANSACTION = 0x4001, EVT_OBJ_ADDED = 0x4002, EVT_OBJ_REMOVED = 0x4003, EVT_OBJ_INFO_CHANGED = 0x4007, /* object properties */ PROP_STORAGE_ID = 0xDC01, PROP_OBJECT_FORMAT = 0xDC02, PROP_OBJECT_COMPRESSED_SIZE = 0xDC04, PROP_PARENT_OBJECT = 0xDC0B, PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER = 0xDC41, PROP_NAME = 0xDC44, }; enum mtp_data_type { DATA_TYPE_UINT16 = 0x0004, DATA_TYPE_UINT32 = 0x0006, DATA_TYPE_UINT64 = 0x0008, DATA_TYPE_UINT128 = 0x000a, DATA_TYPE_STRING = 0xffff, }; 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, }; typedef struct MTPMonEntry MTPMonEntry; struct MTPMonEntry { uint32_t event; uint32_t handle; QTAILQ_ENTRY(MTPMonEntry) next; }; struct MTPControl { uint16_t code; uint32_t trans; int argc; uint32_t argv[5]; }; struct MTPData { uint16_t code; uint32_t trans; uint64_t offset; uint64_t length; uint64_t alloc; uint8_t *data; bool first; /* Used for >4G file sizes */ bool pending; int fd; uint8_t write_status; /* Internal pointer per every MTP_WRITE_BUF_SZ */ uint64_t data_offset; }; struct MTPObject { uint32_t handle; uint16_t format; char *name; char *path; struct stat stat; /* file monitor watch id */ int64_t watchid; MTPObject *parent; uint32_t nchildren; QLIST_HEAD(, MTPObject) children; QLIST_ENTRY(MTPObject) list; 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; bool readonly; QTAILQ_HEAD(, MTPObject) objects; QFileMonitor *file_monitor; QTAILQ_HEAD(, MTPMonEntry) events; /* Responder is expecting a write operation */ bool write_pending; struct { uint32_t parent_handle; uint16_t format; uint32_t size; char *filename; } dataset; }; /* * ObjectInfo dataset received from initiator * Fields we don't care about are ignored */ typedef struct { uint32_t storage_id; /*unused*/ uint16_t format; uint16_t protection_status; /*unused*/ uint32_t size; uint16_t thumb_format; /*unused*/ uint32_t thumb_comp_sz; /*unused*/ uint32_t thumb_pix_width; /*unused*/ uint32_t thumb_pix_height; /*unused*/ uint32_t image_pix_width; /*unused*/ uint32_t image_pix_height; /*unused*/ uint32_t image_bit_depth; /*unused*/ uint32_t parent; /*unused*/ uint16_t assoc_type; uint32_t assoc_desc; uint32_t seq_no; /*unused*/ uint8_t length; /*part of filename field*/ uint8_t filename[0]; /* UTF-16 encoded */ char date_created[0]; /*unused*/ char date_modified[0]; /*unused*/ char keywords[0]; /*unused*/ /* string and other data follows */ } QEMU_PACKED ObjectInfo; #define TYPE_USB_MTP "usb-mtp" #define USB_MTP(obj) OBJECT_CHECK(MTPState, (obj), TYPE_USB_MTP) #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" #define MTP_WRITE_BUF_SZ (512 * KiB) enum { STR_MANUFACTURER = 1, STR_PRODUCT, STR_SERIALNUMBER, STR_MTP, 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_MTP] = "MTP", [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, .iInterface = STR_MTP, .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 = 64, .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, .iInterface = STR_MTP, .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 = 64, .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, const char *name) { MTPObject *o = g_new0(MTPObject, 1); if (name[0] == '.') { goto ignore; } o->watchid = -1; 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) { MTPObject *iter; if (!o) { return; } trace_usb_mtp_object_free(s->dev.addr, o->handle, o->path); if (o->watchid != -1 && s->file_monitor) { qemu_file_monitor_remove_watch(s->file_monitor, o->path, o->watchid); } QTAILQ_REMOVE(&s->objects, o, next); if (o->parent) { QLIST_REMOVE(o, list); o->parent->nchildren--; } while (!QLIST_EMPTY(&o->children)) { iter = QLIST_FIRST(&o->children); usb_mtp_object_free(s, iter); } 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 MTPObject *usb_mtp_add_child(MTPState *s, MTPObject *o, const char *name) { MTPObject *child = usb_mtp_object_alloc(s, s->next_handle++, o, name); if (child) { trace_usb_mtp_add_child(s->dev.addr, child->handle, child->path); QLIST_INSERT_HEAD(&o->children, child, list); o->nchildren++; if (child->format == FMT_ASSOCIATION) { QLIST_INIT(&child->children); } } return child; } static MTPObject *usb_mtp_object_lookup_name(MTPObject *parent, const char *name, int len) { MTPObject *iter; if (len == -1) { len = strlen(name); } QLIST_FOREACH(iter, &parent->children, list) { if (strncmp(iter->name, name, len) == 0) { return iter; } } return NULL; } static MTPObject *usb_mtp_object_lookup_id(MTPState *s, int64_t id) { MTPObject *iter; QTAILQ_FOREACH(iter, &s->objects, next) { if (iter->watchid == id) { return iter; } } return NULL; } static void file_monitor_event(int64_t id, QFileMonitorEvent ev, const char *name, void *opaque) { MTPState *s = opaque; MTPObject *parent = usb_mtp_object_lookup_id(s, id); MTPMonEntry *entry = NULL; MTPObject *o; if (!parent) { return; } switch (ev) { case QFILE_MONITOR_EVENT_CREATED: if (usb_mtp_object_lookup_name(parent, name, -1)) { /* Duplicate create event */ return; } entry = g_new0(MTPMonEntry, 1); entry->handle = s->next_handle; entry->event = EVT_OBJ_ADDED; o = usb_mtp_add_child(s, parent, name); if (!o) { g_free(entry); return; } trace_usb_mtp_file_monitor_event(s->dev.addr, name, "Obj Added"); break; case QFILE_MONITOR_EVENT_DELETED: /* * The kernel issues a IN_IGNORED event * when a dir containing a watchpoint is * deleted, so we don't have to delete the * watchpoint */ o = usb_mtp_object_lookup_name(parent, name, -1); if (!o) { return; } entry = g_new0(MTPMonEntry, 1); entry->handle = o->handle; entry->event = EVT_OBJ_REMOVED; trace_usb_mtp_file_monitor_event(s->dev.addr, o->path, "Obj Deleted"); usb_mtp_object_free(s, o); break; case QFILE_MONITOR_EVENT_MODIFIED: o = usb_mtp_object_lookup_name(parent, name, -1); if (!o) { return; } entry = g_new0(MTPMonEntry, 1); entry->handle = o->handle; entry->event = EVT_OBJ_INFO_CHANGED; trace_usb_mtp_file_monitor_event(s->dev.addr, o->path, "Obj Modified"); break; case QFILE_MONITOR_EVENT_IGNORED: trace_usb_mtp_file_monitor_event(s->dev.addr, parent->path, "Obj parent dir ignored"); break; case QFILE_MONITOR_EVENT_ATTRIBUTES: break; default: g_assert_not_reached(); } if (entry) { QTAILQ_INSERT_HEAD(&s->events, entry, next); } } static void usb_mtp_file_monitor_cleanup(MTPState *s) { MTPMonEntry *e, *p; QTAILQ_FOREACH_SAFE(e, &s->events, next, p) { QTAILQ_REMOVE(&s->events, e, next); g_free(e); } qemu_file_monitor_free(s->file_monitor); s->file_monitor = NULL; } static void usb_mtp_object_readdir(MTPState *s, MTPObject *o) { struct dirent *entry; DIR *dir; int fd; Error *err = NULL; if (o->have_children) { return; } o->have_children = true; fd = open(o->path, O_DIRECTORY | O_CLOEXEC | O_NOFOLLOW); if (fd < 0) { return; } dir = fdopendir(fd); if (!dir) { close(fd); return; } if (s->file_monitor) { int64_t id = qemu_file_monitor_add_watch(s->file_monitor, o->path, NULL, file_monitor_event, s, &err); if (id == -1) { error_report("usb-mtp: failed to add watch for %s: %s", o->path, error_get_pretty(err)); error_free(err); } else { trace_usb_mtp_file_monitor_event(s->dev.addr, o->path, "Watch Added"); o->watchid = id; } } while ((entry = readdir(dir)) != NULL) { usb_mtp_add_child(s, o, entry->d_name); } 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 = g_new(wchar_t, 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); } g_free(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, uint32_t arg2) { 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; } if (argc > 2) { c->argv[2] = arg2; } 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_DELETE_OBJECT, CMD_SEND_OBJECT_INFO, CMD_SEND_OBJECT, CMD_GET_OBJECT, CMD_GET_PARTIAL_OBJECT, CMD_GET_OBJECT_PROPS_SUPPORTED, CMD_GET_OBJECT_PROP_DESC, CMD_GET_OBJECT_PROP_VALUE, }; 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, 0x00000006); usb_mtp_add_u16(d, 0x0064); 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 = 0, handles[o->nchildren]; MTPObject *iter; trace_usb_mtp_op_get_object_handles(s->dev.addr, o->handle, o->path); QLIST_FOREACH(iter, &o->children, list) { handles[i++] = iter->handle; } assert(i == o->nchildren); 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); if (o->stat.st_size > 0xFFFFFFFF) { usb_mtp_add_u32(d, 0xFFFFFFFF); } else { 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 | O_CLOEXEC | O_NOFOLLOW); 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; off_t offset; if (c->argc <= 2) { return NULL; } trace_usb_mtp_op_get_partial_object(s->dev.addr, o->handle, o->path, c->argv[1], c->argv[2]); d = usb_mtp_data_alloc(c); d->fd = open(o->path, O_RDONLY | O_CLOEXEC | O_NOFOLLOW); 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 MTPData *usb_mtp_get_object_props_supported(MTPState *s, MTPControl *c) { static const uint16_t props[] = { PROP_STORAGE_ID, PROP_OBJECT_FORMAT, PROP_OBJECT_COMPRESSED_SIZE, PROP_PARENT_OBJECT, PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER, PROP_NAME, }; MTPData *d = usb_mtp_data_alloc(c); usb_mtp_add_u16_array(d, ARRAY_SIZE(props), props); return d; } static MTPData *usb_mtp_get_object_prop_desc(MTPState *s, MTPControl *c) { MTPData *d = usb_mtp_data_alloc(c); switch (c->argv[0]) { case PROP_STORAGE_ID: usb_mtp_add_u16(d, PROP_STORAGE_ID); usb_mtp_add_u16(d, DATA_TYPE_UINT32); usb_mtp_add_u8(d, 0x00); usb_mtp_add_u32(d, 0x00000000); usb_mtp_add_u32(d, 0x00000000); usb_mtp_add_u8(d, 0x00); break; case PROP_OBJECT_FORMAT: usb_mtp_add_u16(d, PROP_OBJECT_FORMAT); usb_mtp_add_u16(d, DATA_TYPE_UINT16); usb_mtp_add_u8(d, 0x00); usb_mtp_add_u16(d, 0x0000); usb_mtp_add_u32(d, 0x00000000); usb_mtp_add_u8(d, 0x00); break; case PROP_OBJECT_COMPRESSED_SIZE: usb_mtp_add_u16(d, PROP_OBJECT_COMPRESSED_SIZE); usb_mtp_add_u16(d, DATA_TYPE_UINT64); usb_mtp_add_u8(d, 0x00); usb_mtp_add_u64(d, 0x0000000000000000); usb_mtp_add_u32(d, 0x00000000); usb_mtp_add_u8(d, 0x00); break; case PROP_PARENT_OBJECT: usb_mtp_add_u16(d, PROP_PARENT_OBJECT); usb_mtp_add_u16(d, DATA_TYPE_UINT32); usb_mtp_add_u8(d, 0x00); usb_mtp_add_u32(d, 0x00000000); usb_mtp_add_u32(d, 0x00000000); usb_mtp_add_u8(d, 0x00); break; case PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER: usb_mtp_add_u16(d, PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER); usb_mtp_add_u16(d, DATA_TYPE_UINT128); usb_mtp_add_u8(d, 0x00); usb_mtp_add_u64(d, 0x0000000000000000); usb_mtp_add_u64(d, 0x0000000000000000); usb_mtp_add_u32(d, 0x00000000); usb_mtp_add_u8(d, 0x00); break; case PROP_NAME: usb_mtp_add_u16(d, PROP_NAME); usb_mtp_add_u16(d, DATA_TYPE_STRING); usb_mtp_add_u8(d, 0x00); usb_mtp_add_u8(d, 0x00); usb_mtp_add_u32(d, 0x00000000); usb_mtp_add_u8(d, 0x00); break; default: usb_mtp_data_free(d); return NULL; } return d; } static MTPData *usb_mtp_get_object_prop_value(MTPState *s, MTPControl *c, MTPObject *o) { MTPData *d = usb_mtp_data_alloc(c); switch (c->argv[1]) { case PROP_STORAGE_ID: usb_mtp_add_u32(d, QEMU_STORAGE_ID); break; case PROP_OBJECT_FORMAT: usb_mtp_add_u16(d, o->format); break; case PROP_OBJECT_COMPRESSED_SIZE: usb_mtp_add_u64(d, o->stat.st_size); break; case PROP_PARENT_OBJECT: if (o->parent == NULL) { usb_mtp_add_u32(d, 0x00000000); } else { usb_mtp_add_u32(d, o->parent->handle); } break; case PROP_PERSISTENT_UNIQUE_OBJECT_IDENTIFIER: /* Should be persistent between sessions, * but using our objedt ID is "good enough" * for now */ usb_mtp_add_u64(d, 0x0000000000000000); usb_mtp_add_u64(d, o->handle); break; case PROP_NAME: usb_mtp_add_str(d, o->name); break; default: usb_mtp_data_free(d); return NULL; } return d; } /* * Return values when object @o is deleted. * If at least one of the deletions succeeded, * DELETE_SUCCESS is set and if at least one * of the deletions failed, DELETE_FAILURE is * set. Both bits being set (DELETE_PARTIAL) * signifies a RES_PARTIAL_DELETE being sent * back to the initiator. */ enum { DELETE_SUCCESS = (1 << 0), DELETE_FAILURE = (1 << 1), DELETE_PARTIAL = (DELETE_FAILURE | DELETE_SUCCESS), }; static int usb_mtp_deletefn(MTPState *s, MTPObject *o, uint32_t trans) { MTPObject *iter, *iter2; int ret = 0; /* * TODO: Add support for Protection Status */ QLIST_FOREACH(iter, &o->children, list) { if (iter->format == FMT_ASSOCIATION) { QLIST_FOREACH(iter2, &iter->children, list) { ret |= usb_mtp_deletefn(s, iter2, trans); } } } if (o->format == FMT_UNDEFINED_OBJECT) { if (remove(o->path)) { ret |= DELETE_FAILURE; } else { usb_mtp_object_free(s, o); ret |= DELETE_SUCCESS; } } else if (o->format == FMT_ASSOCIATION) { if (rmdir(o->path)) { ret |= DELETE_FAILURE; } else { usb_mtp_object_free(s, o); ret |= DELETE_SUCCESS; } } return ret; } static void usb_mtp_object_delete(MTPState *s, uint32_t handle, uint32_t format_code, uint32_t trans) { MTPObject *o; int ret; /* Return error if store is read-only */ if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) { usb_mtp_queue_result(s, RES_STORE_READ_ONLY, trans, 0, 0, 0, 0); return; } if (format_code != 0) { usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED, trans, 0, 0, 0, 0); return; } if (handle == 0xFFFFFFF) { o = QTAILQ_FIRST(&s->objects); } else { o = usb_mtp_object_lookup(s, handle); } if (o == NULL) { usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, trans, 0, 0, 0, 0); return; } ret = usb_mtp_deletefn(s, o, trans); switch (ret) { case DELETE_SUCCESS: usb_mtp_queue_result(s, RES_OK, trans, 0, 0, 0, 0); break; case DELETE_FAILURE: usb_mtp_queue_result(s, RES_PARTIAL_DELETE, trans, 0, 0, 0, 0); break; case DELETE_PARTIAL: usb_mtp_queue_result(s, RES_PARTIAL_DELETE, trans, 0, 0, 0, 0); break; default: g_assert_not_reached(); } return; } static void usb_mtp_command(MTPState *s, MTPControl *c) { MTPData *data_in = NULL; MTPObject *o = NULL; uint32_t nres = 0, res0 = 0; Error *err = NULL; /* 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, 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, 0); return; } if (c->argv[0] == 0) { usb_mtp_queue_result(s, RES_INVALID_PARAMETER, c->trans, 0, 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); s->file_monitor = qemu_file_monitor_new(&err); if (err) { error_report("usb-mtp: file monitoring init failed: %s", error_get_pretty(err)); error_free(err); } else { QTAILQ_INIT(&s->events); } break; case CMD_CLOSE_SESSION: trace_usb_mtp_op_close_session(s->dev.addr); s->session = 0; s->next_handle = 0; usb_mtp_file_monitor_cleanup(s); 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, 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, 0); return; } if (c->argv[1] != 0x00000000) { usb_mtp_queue_result(s, RES_SPEC_BY_FORMAT_UNSUPPORTED, c->trans, 0, 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, 0); return; } if (o->format != FMT_ASSOCIATION) { usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT, c->trans, 0, 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, 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, 0); return; } if (o->format == FMT_ASSOCIATION) { usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, c->trans, 0, 0, 0, 0); return; } data_in = usb_mtp_get_object(s, c, o); if (data_in == NULL) { usb_mtp_queue_result(s, RES_GENERAL_ERROR, c->trans, 0, 0, 0, 0); return; } break; case CMD_DELETE_OBJECT: usb_mtp_object_delete(s, c->argv[0], c->argv[1], c->trans); return; 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, 0); return; } if (o->format == FMT_ASSOCIATION) { usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, c->trans, 0, 0, 0, 0); return; } data_in = usb_mtp_get_partial_object(s, c, o); if (data_in == NULL) { usb_mtp_queue_result(s, RES_GENERAL_ERROR, c->trans, 0, 0, 0, 0); return; } nres = 1; res0 = data_in->length; break; case CMD_SEND_OBJECT_INFO: /* Return error if store is read-only */ if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) { usb_mtp_queue_result(s, RES_STORE_READ_ONLY, c->trans, 0, 0, 0, 0); } else if (c->argv[0] && (c->argv[0] != QEMU_STORAGE_ID)) { /* First parameter points to storage id or is 0 */ usb_mtp_queue_result(s, RES_STORE_NOT_AVAILABLE, c->trans, 0, 0, 0, 0); } else if (c->argv[1] && !c->argv[0]) { /* If second parameter is specified, first must also be specified */ usb_mtp_queue_result(s, RES_DESTINATION_UNSUPPORTED, c->trans, 0, 0, 0, 0); } else { uint32_t handle = c->argv[1]; if (handle == 0xFFFFFFFF || handle == 0) { /* root object */ o = QTAILQ_FIRST(&s->objects); } else { o = usb_mtp_object_lookup(s, handle); } if (o == NULL) { usb_mtp_queue_result(s, RES_INVALID_OBJECT_HANDLE, c->trans, 0, 0, 0, 0); } else if (o->format != FMT_ASSOCIATION) { usb_mtp_queue_result(s, RES_INVALID_PARENT_OBJECT, c->trans, 0, 0, 0, 0); } } if (o) { s->dataset.parent_handle = o->handle; } s->data_out = usb_mtp_data_alloc(c); return; case CMD_SEND_OBJECT: if (!FLAG_SET(s, MTP_FLAG_WRITABLE)) { usb_mtp_queue_result(s, RES_STORE_READ_ONLY, c->trans, 0, 0, 0, 0); return; } if (!s->write_pending) { usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, c->trans, 0, 0, 0, 0); return; } s->data_out = usb_mtp_data_alloc(c); return; case CMD_GET_OBJECT_PROPS_SUPPORTED: if (c->argv[0] != FMT_UNDEFINED_OBJECT && c->argv[0] != FMT_ASSOCIATION) { usb_mtp_queue_result(s, RES_INVALID_OBJECT_FORMAT_CODE, c->trans, 0, 0, 0, 0); return; } data_in = usb_mtp_get_object_props_supported(s, c); break; case CMD_GET_OBJECT_PROP_DESC: if (c->argv[1] != FMT_UNDEFINED_OBJECT && c->argv[1] != FMT_ASSOCIATION) { usb_mtp_queue_result(s, RES_INVALID_OBJECT_FORMAT_CODE, c->trans, 0, 0, 0, 0); return; } data_in = usb_mtp_get_object_prop_desc(s, c); if (data_in == NULL) { usb_mtp_queue_result(s, RES_INVALID_OBJECT_PROP_CODE, c->trans, 0, 0, 0, 0); return; } break; case CMD_GET_OBJECT_PROP_VALUE: 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, 0); return; } data_in = usb_mtp_get_object_prop_value(s, c, o); if (data_in == NULL) { usb_mtp_queue_result(s, RES_INVALID_OBJECT_PROP_CODE, c->trans, 0, 0, 0, 0); return; } 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, 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, 0); } /* ----------------------------------------------------------------------- */ static void usb_mtp_handle_reset(USBDevice *dev) { MTPState *s = USB_MTP(dev); trace_usb_mtp_reset(s->dev.addr); usb_mtp_file_monitor_cleanup(s); usb_mtp_object_free(s, QTAILQ_FIRST(&s->objects)); 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; MTPState *s = USB_MTP(dev); uint16_t *event = (uint16_t *)data; switch (request) { case ClassInterfaceOutRequest | 0x64: if (*event == EVT_CANCEL_TRANSACTION) { g_free(s->result); s->result = NULL; usb_mtp_data_free(s->data_in); s->data_in = NULL; if (s->write_pending) { g_free(s->dataset.filename); s->write_pending = false; s->dataset.size = 0; } usb_mtp_data_free(s->data_out); s->data_out = NULL; } else { p->status = USB_RET_STALL; } break; default: 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"); } 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 char *utf16_to_str(uint8_t len, uint8_t *str16) { wchar_t *wstr = g_new0(wchar_t, len + 1); int count, dlen; char *dest; for (count = 0; count < len; count++) { /* FIXME: not working for surrogate pairs */ wstr[count] = lduw_le_p(str16 + (count * 2)); } wstr[count] = 0; dlen = wcstombs(NULL, wstr, 0) + 1; dest = g_malloc(dlen); wcstombs(dest, wstr, dlen); g_free(wstr); return dest; } /* Wrapper around write, returns 0 on failure */ static uint64_t write_retry(int fd, void *buf, uint64_t size, off_t offset) { uint64_t ret = 0; if (lseek(fd, offset, SEEK_SET) < 0) { goto done; } ret = qemu_write_full(fd, buf, size); done: return ret; } static int usb_mtp_update_object(MTPObject *parent, char *name) { int ret = 0; MTPObject *o = usb_mtp_object_lookup_name(parent, name, strlen(name)); if (o) { ret = lstat(o->path, &o->stat); } return ret; } static void usb_mtp_write_data(MTPState *s, uint32_t handle) { MTPData *d = s->data_out; MTPObject *parent = usb_mtp_object_lookup(s, s->dataset.parent_handle); char *path = NULL; uint64_t rc; mode_t mask = 0644; int ret = 0; assert(d != NULL); switch (d->write_status) { case WRITE_START: if (!parent || !s->write_pending) { usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, d->trans, 0, 0, 0, 0); return; } if (s->dataset.filename) { path = g_strdup_printf("%s/%s", parent->path, s->dataset.filename); if (s->dataset.format == FMT_ASSOCIATION) { ret = mkdir(path, mask); if (!ret) { usb_mtp_queue_result(s, RES_OK, d->trans, 3, QEMU_STORAGE_ID, s->dataset.parent_handle, handle); goto close; } goto done; } d->fd = open(path, O_CREAT | O_WRONLY | O_CLOEXEC | O_NOFOLLOW, mask); if (d->fd == -1) { ret = 1; goto done; } /* Return success if initiator sent 0 sized data */ if (!s->dataset.size) { goto done; } if (d->length != MTP_WRITE_BUF_SZ && !d->pending) { d->write_status = WRITE_END; } } /* fall through */ case WRITE_CONTINUE: case WRITE_END: rc = write_retry(d->fd, d->data, d->data_offset, d->offset - d->data_offset); if (rc != d->data_offset) { ret = 1; goto done; } if (d->write_status != WRITE_END) { g_free(path); return; } else { /* * Return an incomplete transfer if file size doesn't match * for < 4G file or if lstat fails which will result in an incorrect * file size */ if ((s->dataset.size != 0xFFFFFFFF && d->offset != s->dataset.size) || usb_mtp_update_object(parent, s->dataset.filename)) { usb_mtp_queue_result(s, RES_INCOMPLETE_TRANSFER, d->trans, 0, 0, 0, 0); goto close; } } } done: if (ret) { usb_mtp_queue_result(s, RES_STORE_FULL, d->trans, 0, 0, 0, 0); } else { usb_mtp_queue_result(s, RES_OK, d->trans, 0, 0, 0, 0); } close: /* * The write dataset is kept around and freed only * on success or if another write request comes in */ if (d->fd != -1) { close(d->fd); d->fd = -1; } g_free(s->dataset.filename); s->dataset.size = 0; g_free(path); s->write_pending = false; } static void usb_mtp_write_metadata(MTPState *s, uint64_t dlen) { MTPData *d = s->data_out; ObjectInfo *dataset = (ObjectInfo *)d->data; char *filename; MTPObject *o; MTPObject *p = usb_mtp_object_lookup(s, s->dataset.parent_handle); uint32_t next_handle = s->next_handle; size_t filename_chars = dlen - offsetof(ObjectInfo, filename); /* * filename is utf-16. We're intentionally doing * integer division to truncate if malicious guest * sent an odd number of bytes. */ filename_chars /= 2; assert(!s->write_pending); assert(p != NULL); filename = utf16_to_str(MIN(dataset->length, filename_chars), dataset->filename); if (strchr(filename, '/')) { usb_mtp_queue_result(s, RES_PARAMETER_NOT_SUPPORTED, d->trans, 0, 0, 0, 0); g_free(filename); return; } o = usb_mtp_object_lookup_name(p, filename, -1); if (o != NULL) { next_handle = o->handle; } s->dataset.filename = filename; s->dataset.format = dataset->format; s->dataset.size = dataset->size; s->write_pending = true; if (s->dataset.format == FMT_ASSOCIATION) { usb_mtp_write_data(s, next_handle); } else { usb_mtp_queue_result(s, RES_OK, d->trans, 3, QEMU_STORAGE_ID, s->dataset.parent_handle, next_handle); } } static void usb_mtp_get_data(MTPState *s, mtp_container *container, USBPacket *p) { MTPData *d = s->data_out; uint64_t dlen; uint32_t data_len = p->iov.size; uint64_t total_len; if (!d) { usb_mtp_queue_result(s, RES_INVALID_OBJECTINFO, 0, 0, 0, 0, 0); return; } if (d->first) { /* Total length of incoming data */ total_len = cpu_to_le32(container->length) - sizeof(mtp_container); /* Length of data in this packet */ data_len -= sizeof(mtp_container); if (total_len < MTP_WRITE_BUF_SZ) { usb_mtp_realloc(d, total_len); d->length += total_len; } else { usb_mtp_realloc(d, MTP_WRITE_BUF_SZ - sizeof(mtp_container)); d->length += MTP_WRITE_BUF_SZ - sizeof(mtp_container); } d->offset = 0; d->first = false; d->pending = false; d->data_offset = 0; d->write_status = WRITE_START; } if (d->pending) { memset(d->data, 0, d->length); if (d->length != MTP_WRITE_BUF_SZ) { usb_mtp_realloc(d, MTP_WRITE_BUF_SZ - d->length); d->length += (MTP_WRITE_BUF_SZ - d->length); } d->pending = false; d->write_status = WRITE_CONTINUE; d->data_offset = 0; } if (d->length - d->data_offset > data_len) { dlen = data_len; } else { dlen = d->length - d->data_offset; } switch (d->code) { case CMD_SEND_OBJECT_INFO: usb_packet_copy(p, d->data + d->data_offset, dlen); d->offset += dlen; d->data_offset += dlen; if (d->data_offset == d->length) { /* The operation might have already failed */ if (!s->result) { usb_mtp_write_metadata(s, dlen); } usb_mtp_data_free(s->data_out); s->data_out = NULL; return; } break; case CMD_SEND_OBJECT: usb_packet_copy(p, d->data + d->data_offset, dlen); d->offset += dlen; d->data_offset += dlen; if ((p->iov.size % 64) || !p->iov.size) { assert((s->dataset.size == 0xFFFFFFFF) || (s->dataset.size == d->offset)); if (d->length == MTP_WRITE_BUF_SZ) { d->write_status = WRITE_END; } else { d->write_status = WRITE_START; } usb_mtp_write_data(s, 0); usb_mtp_data_free(s->data_out); s->data_out = NULL; return; } if (d->data_offset == d->length) { d->pending = true; usb_mtp_write_data(s, 0); } break; default: p->status = USB_RET_STALL; return; } } static void usb_mtp_handle_data(USBDevice *dev, USBPacket *p) { MTPState *s = USB_MTP(dev); MTPControl cmd; mtp_container container; uint32_t params[5]; uint16_t container_type; 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; uint64_t dlen = d->length - d->offset; if (d->first) { trace_usb_mtp_data_in(s->dev.addr, d->trans, d->length); if (d->length + sizeof(container) > 0xFFFFFFFF) { container.length = cpu_to_le32(0xFFFFFFFF); } else { 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; } if ((s->data_out != NULL) && !s->data_out->first) { container_type = TYPE_DATA; } else { usb_packet_copy(p, &container, sizeof(container)); container_type = le16_to_cpu(container.type); } switch (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; case TYPE_DATA: /* One of the previous transfers has already errored but the * responder is still sending data associated with it */ if (s->result != NULL) { return; } usb_mtp_get_data(s, &container, p); break; default: /* not needed as long as the mtp device is read-only */ p->status = USB_RET_STALL; return; } break; case EP_EVENT: if (!QTAILQ_EMPTY(&s->events)) { struct MTPMonEntry *e = QTAILQ_LAST(&s->events); uint32_t handle; int len = sizeof(container) + sizeof(uint32_t); if (p->iov.size < len) { trace_usb_mtp_stall(s->dev.addr, "packet too small to send event"); p->status = USB_RET_STALL; return; } QTAILQ_REMOVE(&s->events, e, next); container.length = cpu_to_le32(len); container.type = cpu_to_le32(TYPE_EVENT); container.code = cpu_to_le16(e->event); container.trans = 0; /* no trans specific events */ handle = cpu_to_le32(e->handle); usb_packet_copy(p, &container, sizeof(container)); usb_packet_copy(p, &handle, sizeof(uint32_t)); g_free(e); return; } 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 void usb_mtp_realize(USBDevice *dev, Error **errp) { MTPState *s = USB_MTP(dev); if ((s->root == NULL) || !g_path_is_absolute(s->root)) { error_setg(errp, "usb-mtp: rootdir must be configured and be an absolute path"); return; } if (access(s->root, R_OK) != 0) { error_setg(errp, "usb-mtp: rootdir does not exist/not readable"); return; } else if (!s->readonly && access(s->root, W_OK) != 0) { error_setg(errp, "usb-mtp: rootdir does not have write permissions"); return; } /* Mark store as RW */ if (!s->readonly) { s->flags |= (1 << MTP_FLAG_WRITABLE); } if (s->desc == NULL) { /* * This does not check if path exists * but we have the checks above */ s->desc = g_path_get_basename(s->root); } usb_desc_create_serial(dev); usb_desc_init(dev); QTAILQ_INIT(&s->objects); } 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("rootdir", MTPState, root), DEFINE_PROP_STRING("desc", MTPState, desc), DEFINE_PROP_BOOL("readonly", MTPState, readonly, true), 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->realize = usb_mtp_realize; 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; set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); dc->desc = "USB Media Transfer Protocol device"; dc->fw_name = "mtp"; dc->vmsd = &vmstate_usb_mtp; dc->props = mtp_properties; } static TypeInfo mtp_info = { .name = TYPE_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)