[Spice-devel] [PATCH spice-gtk v4 13/29] usb-redir: add implementation of emulated CD device
Frediano Ziglio
fziglio at redhat.com
Tue Aug 27 09:22:30 UTC 2019
From: Yuri Benditovich <yuri.benditovich at daynix.com>
This module contains implementation of emulated device
interface for shared CD.
Signed-off-by: Yuri Benditovich <yuri.benditovich at daynix.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 00000000..c33bb290
--- /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 00000000..e9852422
--- /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);
--
2.20.1
More information about the Spice-devel
mailing list