| /* |
| * 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_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 = 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, |
| .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 = 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 (data_in == NULL) { |
| 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 (data_in == NULL) { |
| 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 void usb_mtp_realize(USBDevice *dev, Error **errp) |
| { |
| 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"); |
| } |
| } |
| } |
| |
| 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("x-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->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; |
| 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) |