[Spice-devel] [spice-gtk v3 7/9] usb-redir: add implementation of emulated CD device
Frediano Ziglio
fziglio at redhat.com
Thu Aug 22 06:31:06 UTC 2019
>
> This module contains implementation of emulated device
> interface for shared CD.
>
> Signed-off-by: Yuri Benditovich <yuri.benditovich at daynix.com>
Acked-by: Frediano Ziglio <fziglio at redhat.com>
> ---
> src/usb-device-cd.c | 783 ++++++++++++++++++++++++++++++++++++++++++++
> src/usb-device-cd.h | 34 ++
> 2 files changed, 817 insertions(+)
> create mode 100644 src/usb-device-cd.c
> create mode 100644 src/usb-device-cd.h
>
> diff --git a/src/usb-device-cd.c b/src/usb-device-cd.c
> new file mode 100644
> index 0000000..c33bb29
> --- /dev/null
> +++ b/src/usb-device-cd.c
> @@ -0,0 +1,783 @@
> +/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
> +/*
> + Copyright (C) 2019 Red Hat, Inc.
> +
> + Red Hat Authors:
> + Yuri Benditovich<ybendito at redhat.com>
> +
> + This library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + This library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with this library; if not, see
> <http://www.gnu.org/licenses/>.
> +*/
> +
> +#include "config.h"
> +
> +#ifdef USE_USBREDIR
> +
> +#include <glib-object.h>
> +#include <inttypes.h>
> +#include <gio/gio.h>
> +#include <glib/gi18n-lib.h>
> +#include <errno.h>
> +#include <libusb.h>
> +#include <fcntl.h>
> +
> +#ifdef G_OS_WIN32
> +#include <windows.h>
> +#include <ntddcdrm.h>
> +#include <ntddmmc.h>
> +#else
> +#include <sys/stat.h>
> +#include <sys/ioctl.h>
> +#include <linux/fs.h>
> +#include <linux/cdrom.h>
> +#endif
> +
> +#include "usb-emulation.h"
> +#include "usb-device-cd.h"
> +#include "cd-usb-bulk-msd.h"
> +
> +typedef struct SpiceCdLU {
> + char *filename;
> + GFileInputStream *stream;
> + uint64_t size;
> + uint32_t blockSize;
> + uint32_t loaded : 1;
> + uint32_t device : 1;
> +} SpiceCdLU;
> +
> +#define MAX_LUN_PER_DEVICE 1
> +#define USB2_BCD 0x200
> +#define CD_DEV_VID 0x2b23
> +#define CD_DEV_PID 0xCDCD
> +#define CD_DEV_CLASS 8
> +#define CD_DEV_SUBCLASS 6
> +#define CD_DEV_PROTOCOL 0x50
> +#define CD_DEV_BLOCK_SIZE 0x200
> +#define DVD_DEV_BLOCK_SIZE 0x800
> +#define MAX_BULK_IN_REQUESTS 64
> +
> +struct BufferedBulkRead {
> + struct usb_redir_bulk_packet_header hout;
> + uint64_t id;
> +};
> +
> +struct SpiceUsbEmulatedDevice {
> + UsbDeviceOps dev_ops;
> + SpiceUsbBackend *backend;
> + SpiceUsbBackendDevice *parent;
> + struct usbredirparser *parser;
> + UsbCdBulkMsdDevice* msc;
> + SpiceCdLU units[MAX_LUN_PER_DEVICE];
> + gboolean locked;
> + gboolean delete_on_eject;
> + gboolean deleting;
> + uint32_t num_reads;
> + struct BufferedBulkRead read_bulk[MAX_BULK_IN_REQUESTS];
> + /* according to USB MSC spec */
> + uint16_t serial[12];
> + uint8_t max_lun_index;
> +};
> +
> +typedef struct SpiceUsbEmulatedDevice UsbCd;
> +
> +#ifndef G_OS_WIN32
> +
> +static int cd_device_open_stream(SpiceCdLU *unit, const char *filename)
> +{
> + unit->device = 0;
> +
> + if (!unit->filename && !filename) {
> + SPICE_DEBUG("%s: file name not provided", __FUNCTION__);
> + return -1;
> + }
> + if (unit->filename && filename) {
> + g_free(unit->filename);
> + unit->filename = NULL;
> + }
> + if (filename) {
> + unit->filename = g_strdup(filename);
> + }
> +
> + int fd = open(unit->filename, O_RDONLY | O_NONBLOCK);
> + if (fd < 0) {
> + SPICE_DEBUG("%s: can't open file %s", __FUNCTION__, unit->filename);
> + return -1;
> + }
> +
> + struct stat file_stat = { 0 };
> + if (fstat(fd, &file_stat) || file_stat.st_size == 0) {
> + file_stat.st_size = 0;
> + unit->device = 1;
> + if (!ioctl(fd, BLKGETSIZE64, &file_stat.st_size) &&
> + !ioctl(fd, BLKSSZGET, &unit->blockSize)) {
> + }
> + }
> + unit->size = file_stat.st_size;
> + close(fd);
> + if (unit->size) {
> + GFile *file_object = g_file_new_for_path(unit->filename);
> + unit->stream = g_file_read(file_object, NULL, NULL);
> + g_clear_object(&file_object);
> + }
> + if (!unit->stream) {
> + SPICE_DEBUG("%s: can't open stream on %s", __FUNCTION__,
> unit->filename);
> + return -1;
> + }
> +
> + return 0;
> +}
> +
> +static int cd_device_load(SpiceCdLU *unit, gboolean load)
> +{
> + int error;
> + if (!unit->device || !unit->filename) {
> + return -1;
> + }
> + int fd = open(unit->filename, O_RDONLY | O_NONBLOCK);
> + if (fd < 0) {
> + return -1;
> + }
> + if (load) {
> + error = ioctl(fd, CDROMCLOSETRAY, 0);
> + } else {
> + error = ioctl(fd, CDROM_LOCKDOOR, 0);
> + error = ioctl(fd, CDROMEJECT, 0);
> + }
> + if (error) {
> + // note that ejecting might be available only for root
> + // loading might be available also for regular user
> + SPICE_DEBUG("%s: can't %sload %s, res %d, errno %d",
> + __FUNCTION__, load ? "" : "un", unit->filename, error, errno);
> + }
> + close(fd);
> + return error;
> +}
> +
> +static int cd_device_check(SpiceCdLU *unit)
> +{
> + int error;
> + if (!unit->device || !unit->filename) {
> + return -1;
> + }
> + int fd = open(unit->filename, O_RDONLY | O_NONBLOCK);
> + if (fd < 0) {
> + return -1;
> + }
> + error = ioctl(fd, CDROM_DRIVE_STATUS, 0);
> + error = (error == CDS_DISC_OK) ? 0 : -1;
> + if (!error) {
> + error = ioctl(fd, CDROM_DISC_STATUS, 0);
> + error = (error == CDS_DATA_1) ? 0 : -1;
> + }
> + close(fd);
> + return error;
> +}
> +
> +#else
> +
> +static gboolean is_device_name(const char *filename)
> +{
> + return g_ascii_isalpha(filename[0]) && filename[1] == ':' &&
> + filename[2] == 0;
> +}
> +
> +static HANDLE open_file(const char *filename)
> +{
> + HANDLE h = CreateFileA(filename,
> + GENERIC_READ,
> + FILE_SHARE_READ,
> + NULL, OPEN_EXISTING,
> + 0,
> + NULL);
> + if (h == INVALID_HANDLE_VALUE) {
> + h = NULL;
> + }
> + return h;
> +}
> +
> +static uint32_t ioctl_out(HANDLE h, uint32_t code, void *out_buffer,
> uint32_t out_size)
> +{
> + uint32_t error;
> + DWORD ret;
> + BOOL b = DeviceIoControl(h, code, NULL, 0, out_buffer, out_size, &ret,
> NULL);
> + error = b ? 0 : GetLastError();
> + return error;
> +}
> +
> +static uint32_t ioctl_none(HANDLE h, uint32_t code)
> +{
> + return ioctl_out(h, code, NULL, 0);
> +}
> +
> +static gboolean check_device(HANDLE h)
> +{
> + GET_CONFIGURATION_IOCTL_INPUT cfgIn =
> + { FeatureCdRead, SCSI_GET_CONFIGURATION_REQUEST_TYPE_ALL, {} };
> + DWORD ret;
> + GET_CONFIGURATION_HEADER cfgOut;
> + return DeviceIoControl(h, IOCTL_CDROM_GET_CONFIGURATION,
> + &cfgIn, sizeof(cfgIn), &cfgOut, sizeof(cfgOut),
> + &ret, NULL);
> +}
> +
> +static int cd_device_open_stream(SpiceCdLU *unit, const char *filename)
> +{
> + HANDLE h;
> + unit->device = 0;
> + if (!unit->filename && !filename) {
> + SPICE_DEBUG("%s: unnamed file", __FUNCTION__);
> + return -1;
> + }
> + if (unit->filename && filename) {
> + g_free(unit->filename);
> + unit->filename = NULL;
> + }
> + if (!filename) {
> + // reopening the stream on existing file name
> + } else if (is_device_name(filename)) {
> + unit->filename = g_strdup_printf("\\\\.\\%s", filename);
> + } else {
> + unit->filename = g_strdup(filename);
> + }
> + h = open_file(unit->filename);
> + if (!h) {
> + SPICE_DEBUG("%s: can't open file %s", __FUNCTION__, unit->filename);
> + return -1;
> + }
> +
> + LARGE_INTEGER size = { 0 };
> + if (!GetFileSizeEx(h, &size)) {
> + uint64_t buffer[256];
> + uint32_t res;
> + unit->device = check_device(h);
> + SPICE_DEBUG("%s: CD device %srecognized on %s",
> + __FUNCTION__, unit->device ? "" : "NOT ", unit->filename);
> + res = ioctl_out(h, IOCTL_DISK_GET_DRIVE_GEOMETRY_EX,
> + buffer, sizeof(buffer));
> + if (!res) {
> + DISK_GEOMETRY_EX *pg = (DISK_GEOMETRY_EX *)buffer;
> + unit->blockSize = pg->Geometry.BytesPerSector;
> + size = pg->DiskSize;
> + } else {
> + SPICE_DEBUG("%s: can't obtain size of %s (error %u)",
> + __FUNCTION__, unit->filename, res);
> + }
> + }
> + unit->size = size.QuadPart;
> + CloseHandle(h);
> + if (unit->size) {
> + GFile *file_object = g_file_new_for_path(unit->filename);
> + unit->stream = g_file_read(file_object, NULL, NULL);
> + g_clear_object(&file_object);
> + }
> + if (!unit->stream) {
> + SPICE_DEBUG("%s: can't open stream on %s", __FUNCTION__,
> unit->filename);
> + return -1;
> + }
> + return 0;
> +}
> +
> +static int cd_device_load(SpiceCdLU *unit, gboolean load)
> +{
> + int error = 0;
> + HANDLE h;
> + if (!unit->device || !unit->filename) {
> + return -1;
> + }
> + h = open_file(unit->filename);
> + if (h) {
> + uint32_t res = ioctl_none(h, load ? IOCTL_STORAGE_LOAD_MEDIA :
> IOCTL_STORAGE_EJECT_MEDIA);
> + if (res) {
> + SPICE_DEBUG("%s: can't %sload %s, win error %u",
> + __FUNCTION__, load ? "" : "un", unit->filename,
> res);
> + error = -1;
> + } else {
> + SPICE_DEBUG("%s: device %s [%s]",
> + __FUNCTION__, load ? "loaded" : "ejected",
> unit->filename);
> + }
> + CloseHandle(h);
> + }
> + return error;
> +}
> +
> +static int cd_device_check(SpiceCdLU *unit)
> +{
> + int error = 0;
> + CDROM_DISK_DATA data;
> + HANDLE h;
> + if (!unit->device || !unit->filename) {
> + return -1;
> + }
> + h = open_file(unit->filename);
> + if (h) {
> + uint32_t res = ioctl_none(h, IOCTL_STORAGE_CHECK_VERIFY);
> + if (!res) {
> + res = ioctl_out(h, IOCTL_CDROM_DISK_TYPE, &data, sizeof(data));
> + }
> + if (res != 0 || data.DiskData != CDROM_DISK_DATA_TRACK) {
> + error = -1;
> + }
> + CloseHandle(h);
> + }
> + return error;
> +}
> +
> +#endif
> +
> +static gboolean open_stream(SpiceCdLU *unit, const char *filename)
> +{
> + gboolean b;
> + b = cd_device_open_stream(unit, filename) == 0;
> + return b;
> +}
> +
> +static void close_stream(SpiceCdLU *unit)
> +{
> + g_clear_object(&unit->stream);
> +}
> +
> +static gboolean load_lun(UsbCd *d, int unit, gboolean load)
> +{
> + gboolean b = TRUE;
> + if (load && d->units[unit].device) {
> + // there is one possible problem in case our backend is the
> + // local CD device and it is ejected
> + cd_device_load(&d->units[unit], TRUE);
> + close_stream(&d->units[unit]);
> + if (cd_device_check(&d->units[unit]) ||
> !open_stream(&d->units[unit], NULL)) {
> + return FALSE;
> + }
> + }
> +
> + if (load) {
> + CdScsiMediaParameters media_params = { 0 };
> +
> + media_params.stream = d->units[unit].stream;
> + media_params.size = d->units[unit].size;
> + media_params.block_size = d->units[unit].blockSize;
> + if (media_params.block_size == CD_DEV_BLOCK_SIZE &&
> + media_params.size % DVD_DEV_BLOCK_SIZE == 0) {
> + media_params.block_size = DVD_DEV_BLOCK_SIZE;
> + }
> + SPICE_DEBUG("%s: loading %s, size %" G_GUINT64_FORMAT ", block %u",
> + __FUNCTION__, d->units[unit].filename,
> media_params.size, media_params.block_size);
> +
> + b = !cd_usb_bulk_msd_load(d->msc, unit, &media_params);
> +
> + d->units[unit].loaded = !!b;
> +
> + } else {
> + SPICE_DEBUG("%s: unloading %s", __FUNCTION__,
> d->units[unit].filename);
> + cd_usb_bulk_msd_unload(d->msc, unit);
> + d->units[unit].loaded = FALSE;
> + }
> + return b;
> +}
> +
> +static void usb_cd_unrealize(UsbCd *d)
> +{
> + uint32_t unit = 0;
> + cd_usb_bulk_msd_unrealize(d->msc, unit);
> + g_clear_pointer(&d->units[unit].filename, g_free);
> + close_stream(&d->units[unit]);
> + g_clear_pointer(&d->msc, cd_usb_bulk_msd_free);
> + g_free(d);
> +}
> +
> +static gboolean usb_cd_get_descriptor(UsbCd *d, uint8_t type, uint8_t index,
> + void **buffer, uint16_t *size)
> +{
> + static struct libusb_device_descriptor desc = {
> + .bLength = 18,
> + .bDescriptorType = LIBUSB_DT_DEVICE,
> + .bcdUSB = USB2_BCD,
> + .bDeviceClass = 0,
> + .bDeviceSubClass = 0,
> + .bDeviceProtocol = 0,
> + .bMaxPacketSize0 = 64,
> + .idVendor = CD_DEV_VID,
> + .idProduct = CD_DEV_PID,
> + .bcdDevice = 0x100,
> + .iManufacturer = 1,
> + .iProduct = 2,
> + .iSerialNumber = 3,
> + .bNumConfigurations = 1
> + };
> + static uint8_t cfg[] =
> + {
> + 9, //len of cfg desc
> + LIBUSB_DT_CONFIG, // desc type
> + 0x20, // wlen
> + 0,
> + 1, // num if
> + 1, // cfg val
> + 0, // cfg name
> + 0x80, // bus powered
> + 0x32, // 100 ma
> + 9, // len of IF desc
> + LIBUSB_DT_INTERFACE,
> + 0, // num if
> + 0, // alt setting
> + 2, // num of endpoints
> + CD_DEV_CLASS,
> + CD_DEV_SUBCLASS,
> + CD_DEV_PROTOCOL,
> + 0, // if name
> + 7,
> + LIBUSB_DT_ENDPOINT,
> + 0x81, //->Direction : IN - EndpointID : 1
> + 0x02, //->Bulk Transfer Type
> + 0, //wMaxPacketSize : 0x0200 = 0x200 max bytes
> + 2,
> + 0, //bInterval
> + 7,
> + LIBUSB_DT_ENDPOINT,
> + 0x02, //->Direction : OUT - EndpointID : 2
> + 0x02, //->Bulk Transfer Type
> + 0, //wMaxPacketSize : 0x0200 = 0x200 max bytes
> + 2,
> + 0, //bInterval
> + };
> + static uint16_t s0[2] = { 0x304, 0x409 };
> + static uint16_t s1[8] = { 0x310, 'R', 'e', 'd', ' ', 'H', 'a', 't' };
> + static uint16_t s2[9] = { 0x312, 'S', 'p', 'i', 'c', 'e', ' ', 'C', 'D'
> };
> +
> + void *p = NULL;
> + uint16_t len = 0;
> +
> + switch (type) {
> + case LIBUSB_DT_DEVICE:
> + p = &desc;
> + len = sizeof(desc);
> + break;
> + case LIBUSB_DT_CONFIG:
> + p = cfg;
> + len = sizeof(cfg);
> + break;
> + case LIBUSB_DT_STRING:
> + if (index == 0) {
> + p = s0; len = sizeof(s0);
> + } else if (index == 1) {
> + p = s1; len = sizeof(s1);
> + } else if (index == 2) {
> + p = s2; len = sizeof(s2);
> + } else if (index == 3) {
> + p = d->serial; len = sizeof(d->serial);
> + }
> + break;
> + }
> +
> + if (p) {
> + *buffer = p;
> + *size = len;
> + }
> +
> + return p != NULL;
> +}
> +
> +static void usb_cd_attach(UsbCd *device, struct usbredirparser *parser)
> +{
> + device->parser = parser;
> +}
> +
> +static void usb_cd_detach(UsbCd *device)
> +{
> + device->parser = NULL;
> +}
> +
> +static void usb_cd_reset(UsbCd *device)
> +{
> + cd_usb_bulk_msd_reset(device->msc);
> +}
> +
> +static void usb_cd_control_request(UsbCd *device,
> + uint8_t *data, int data_len,
> + struct usb_redir_control_packet_header
> *h,
> + void **buffer)
> +{
> + uint8_t reqtype = h->requesttype & 0x7f;
> + if (!device->msc) {
> + return;
> + }
> + if (reqtype == (LIBUSB_REQUEST_TYPE_STANDARD |
> LIBUSB_RECIPIENT_ENDPOINT)) {
> + // might be clear stall request
> + h->length = 0;
> + h->status = usb_redir_success;;
> + return;
> + }
> +
> + if (reqtype == (LIBUSB_REQUEST_TYPE_CLASS | LIBUSB_RECIPIENT_INTERFACE))
> {
> + switch (h->request) {
> + case 0xFF:
> + // mass-storage class request 'reset'
> + usb_cd_reset(device);
> + h->length = 0;
> + h->status = usb_redir_success;
> + break;
> + case 0xFE:
> + // mass-storage class request 'get max lun'
> + // returning one byte
> + if (h->length) {
> + h->length = 1;
> + h->status = usb_redir_success;;
> + *buffer = &device->max_lun_index;
> + }
> + break;
> + }
> + }
> +}
> +
> +static void usb_cd_bulk_out_request(UsbCd *device,
> + uint8_t ep, uint8_t *data, int data_len,
> + uint8_t *status)
> +{
> + if (!cd_usb_bulk_msd_write(device->msc, data, data_len)) {
> + *status = usb_redir_success;
> + }
> +}
> +
> +void cd_usb_bulk_msd_read_complete(void *user_data,
> + uint8_t *data, uint32_t length,
> CdUsbBulkStatus status)
> +{
> + UsbCd *d = (UsbCd *)user_data;
> +
> + if (d->deleting) {
> + d->deleting = FALSE;
> + spice_usb_backend_device_eject(d->backend, d->parent);
> + }
> +
> + if (d->parser) {
> + int nread;
> + uint32_t offset = 0;
> +
> + for (nread = 0; nread < d->num_reads; nread++) {
> + uint32_t max_len;
> + max_len = (d->read_bulk[nread].hout.length_high << 16) |
> + d->read_bulk[nread].hout.length;
> + if (max_len > length) {
> + max_len = length;
> + d->read_bulk[nread].hout.length = length;
> + d->read_bulk[nread].hout.length_high = length >> 16;
> + }
> +
> + switch (status) {
> + case BULK_STATUS_GOOD:
> + d->read_bulk[nread].hout.status = usb_redir_success;
> + break;
> + case BULK_STATUS_CANCELED:
> + d->read_bulk[nread].hout.status = usb_redir_cancelled;
> + break;
> + case BULK_STATUS_ERROR:
> + d->read_bulk[nread].hout.status = usb_redir_ioerror;
> + break;
> + case BULK_STATUS_STALL:
> + default:
> + d->read_bulk[nread].hout.status = usb_redir_stall;
> + break;
> + }
> +
> + SPICE_DEBUG("%s: responding %" G_GUINT64_FORMAT " with len %u
> out of %u, status %d",
> + __FUNCTION__, d->read_bulk[nread].id, max_len,
> + length, d->read_bulk[nread].hout.status);
> + usbredirparser_send_bulk_packet(d->parser,
> d->read_bulk[nread].id,
> + &d->read_bulk[nread].hout,
> + max_len ? (data + offset) :
> NULL,
> + max_len);
> + offset += max_len;
> + length -= max_len;
> + }
> + d->num_reads = 0;
> + usbredirparser_do_write(d->parser);
> +
> + if (length) {
> + SPICE_DEBUG("%s: ERROR: %u bytes were not reported!",
> __FUNCTION__, length);
> + }
> +
> + } else {
> + SPICE_DEBUG("%s: broken device<->channel relationship!",
> __FUNCTION__);
> + }
> +}
> +
> +/* device reset completion callback */
> +void cd_usb_bulk_msd_reset_complete(void *user_data, int status)
> +{
> + // UsbCd *d = (UsbCd *)user_data;
> +}
> +
> +static gboolean usb_cd_bulk_in_request(UsbCd *d, uint64_t id,
> + struct usb_redir_bulk_packet_header
> *h)
> +{
> + int res;
> + uint32_t len = (h->length_high << 16) | h->length;
> + if (d->num_reads >= MAX_BULK_IN_REQUESTS) {
> + h->length = h->length_high = 0;
> + SPICE_DEBUG("%s: too many pending reads", __FUNCTION__);
> + h->status = usb_redir_babble;
> + return FALSE;
> + }
> +
> + if (d->num_reads) {
> + SPICE_DEBUG("%s: already has %u pending reads", __FUNCTION__,
> d->num_reads);
> + }
> +
> + d->read_bulk[d->num_reads].hout = *h;
> + d->read_bulk[d->num_reads].id = id;
> + d->num_reads++;
> + res = cd_usb_bulk_msd_read(d->msc, len);
> + if (!res) {
> + return TRUE;
> + }
> +
> + SPICE_DEBUG("%s: error on bulk read", __FUNCTION__);
> + d->num_reads--;
> + h->length = h->length_high = 0;
> + h->status = usb_redir_ioerror;
> +
> + return FALSE;
> +}
> +
> +static void usb_cd_cancel_request(UsbCd *d, uint64_t id)
> +{
> + uint32_t nread;
> +
> + for (nread = 0; nread < d->num_reads; nread++) {
> + if (d->read_bulk[nread].id == id) {
> + if (cd_usb_bulk_msd_cancel_read(d->msc)) {
> + cd_usb_bulk_msd_read_complete(d, NULL, 0,
> BULK_STATUS_CANCELED);
> + }
> + return;
> + }
> + }
> + SPICE_DEBUG("%s: ERROR: no such id to cancel!", __FUNCTION__);
> +}
> +
> +// called when a change happens on SCSI layer
> +void cd_usb_bulk_msd_lun_changed(void *user_data, uint32_t lun)
> +{
> + UsbCd *d = (UsbCd *)user_data;
> + CdScsiDeviceInfo cd_info;
> +
> + if (!cd_usb_bulk_msd_get_info(d->msc, lun, &cd_info)) {
> + // load or unload command received from SCSI
> + if (d->units[lun].loaded != cd_info.loaded) {
> + if (!load_lun(d, lun, cd_info.loaded)) {
> + SPICE_DEBUG("%s: load failed, unloading unit",
> __FUNCTION__);
> + cd_usb_bulk_msd_unload(d->msc, lun);
> + }
> + }
> + }
> +
> + if (d->delete_on_eject) {
> + d->delete_on_eject = FALSE;
> + d->deleting = TRUE;
> + } else {
> + spice_usb_backend_device_report_change(d->backend, d->parent);
> + }
> +}
> +
> +static gchar *usb_cd_get_product_description(UsbCd *device)
> +{
> + gchar *base_name = g_path_get_basename(device->units[0].filename);
> + gchar *res = g_strdup_printf("SPICE CD (%s)", base_name);
> + g_free(base_name);
> + return res;
> +}
> +
> +static const UsbDeviceOps devops =
> +{
> + .get_descriptor = usb_cd_get_descriptor,
> + .get_product_description = usb_cd_get_product_description,
> + .attach = usb_cd_attach,
> + .reset = usb_cd_reset,
> + .detach = usb_cd_detach,
> + .control_request = usb_cd_control_request,
> + .bulk_out_request = usb_cd_bulk_out_request,
> + .bulk_in_request = usb_cd_bulk_in_request,
> + .cancel_request = usb_cd_cancel_request,
> + .unrealize = usb_cd_unrealize,
> +};
> +
> +static UsbCd* usb_cd_create(SpiceUsbBackend *be,
> + SpiceUsbBackendDevice *parent,
> + void *opaque_param,
> + GError **err)
> +{
> + CdEmulationParams *param = opaque_param;
> + int error = 0, i;
> + uint32_t unit = 0;
> + UsbCd *d = g_new0(UsbCd, 1);
> + CdScsiDeviceParameters dev_params = { 0 };
> + uint16_t address = spice_usb_backend_device_get_info(parent)->address;
> +
> + d->dev_ops = devops;
> + d->backend = be;
> + d->parent = parent;
> + d->delete_on_eject = !!param->delete_on_eject;
> + d->locked = !d->delete_on_eject;
> + d->serial[0] = 0x0300 + sizeof(d->serial);
> + d->serial[1] = '0' + address / 10;
> + d->serial[2] = '0' + address % 10;
> + for (i = 3; i < G_N_ELEMENTS(d->serial); ++i) {
> + d->serial[i] = '0';
> + }
> + d->max_lun_index = MAX_LUN_PER_DEVICE - 1;
> +
> + dev_params.vendor = "Red Hat";
> + dev_params.product = "SPICE CD";
> + dev_params.version = "0";
> +
> + d->msc = cd_usb_bulk_msd_alloc(d, MAX_LUN_PER_DEVICE);
> + if (!d->msc) {
> + g_clear_pointer(&d, g_free);
> + g_set_error(err, SPICE_CLIENT_ERROR, SPICE_CLIENT_ERROR_FAILED,
> + _("can't allocate device"));
> + return NULL;
> + }
> + d->units[unit].blockSize = CD_DEV_BLOCK_SIZE;
> + if (!cd_usb_bulk_msd_realize(d->msc, unit, &dev_params)) {
> + if (open_stream(&d->units[unit], param->filename) &&
> + load_lun(d, unit, TRUE)) {
> + if (d->locked) {
> + cd_usb_bulk_msd_lock(d->msc, unit, TRUE);
> + }
> + } else {
> + close_stream(&d->units[unit]);
> + cd_usb_bulk_msd_unrealize(d->msc, unit);
> + g_set_error(err, SPICE_CLIENT_ERROR, SPICE_CLIENT_ERROR_FAILED,
> + _("can't create device with %s"),
> + param->filename);
> + error = 1;
> + }
> + } else {
> + g_set_error(err, SPICE_CLIENT_ERROR, SPICE_CLIENT_ERROR_FAILED,
> + _("can't allocate device"));
> + error = 1;
> + }
> + if (error) {
> + g_clear_pointer(&d->msc, cd_usb_bulk_msd_free);
> + g_clear_pointer(&d, g_free);
> + return NULL;
> + }
> +
> + return d;
> +}
> +
> +gboolean
> +create_emulated_cd(SpiceUsbBackend *be,
> + CdEmulationParams *param,
> + GError **err)
> +{
> + return spice_usb_backend_create_emulated_device(be, usb_cd_create,
> param, err);
> +}
> +
> +#endif /* USE_USBREDIR */
> diff --git a/src/usb-device-cd.h b/src/usb-device-cd.h
> new file mode 100644
> index 0000000..e985242
> --- /dev/null
> +++ b/src/usb-device-cd.h
> @@ -0,0 +1,34 @@
> +/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
> +/*
> + Copyright (C) 2019 Red Hat, Inc.
> +
> + Red Hat Authors:
> + Yuri Benditovich<ybendito at redhat.com>
> +
> + This library is free software; you can redistribute it and/or
> + modify it under the terms of the GNU Lesser General Public
> + License as published by the Free Software Foundation; either
> + version 2.1 of the License, or (at your option) any later version.
> +
> + This library is distributed in the hope that it will be useful,
> + but WITHOUT ANY WARRANTY; without even the implied warranty of
> + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + Lesser General Public License for more details.
> +
> + You should have received a copy of the GNU Lesser General Public
> + License along with this library; if not, see
> <http://www.gnu.org/licenses/>.
> +*/
> +
> +#pragma once
> +
> +#include "usb-backend.h"
> +
> +typedef struct CdEmulationParams {
> + const char *filename;
> + uint32_t delete_on_eject : 1;
> +} CdEmulationParams;
> +
> +gboolean
> +create_emulated_cd(SpiceUsbBackend *be,
> + CdEmulationParams *param,
> + GError **err);
> --
> 2.17.1
>
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