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wine-wine/dlls/winebus.sys/bus_udev.c

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/*
* Plug and Play support for hid devices found through udev
*
* Copyright 2016 CodeWeavers, Aric Stewart
*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdlib.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#ifdef HAVE_POLL_H
# include <poll.h>
#endif
#ifdef HAVE_SYS_POLL_H
# include <sys/poll.h>
#endif
#ifdef HAVE_LIBUDEV_H
# include <libudev.h>
#endif
#ifdef HAVE_LINUX_HIDRAW_H
# include <linux/hidraw.h>
#endif
#ifdef HAVE_SYS_IOCTL_H
# include <sys/ioctl.h>
#endif
#define NONAMELESSUNION
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "windef.h"
#include "winbase.h"
#include "winnls.h"
#include "winternl.h"
#include "ddk/wdm.h"
#include "wine/debug.h"
#include "bus.h"
WINE_DEFAULT_DEBUG_CHANNEL(plugplay);
#ifdef HAVE_UDEV
static struct udev *udev_context = NULL;
static DRIVER_OBJECT *udev_driver_obj = NULL;
static const WCHAR hidraw_busidW[] = {'H','I','D','R','A','W',0};
#include "initguid.h"
DEFINE_GUID(GUID_DEVCLASS_HIDRAW, 0x3def44ad,0x242e,0x46e5,0x82,0x6d,0x70,0x72,0x13,0xf3,0xaa,0x81);
struct platform_private
{
struct udev_device *udev_device;
int device_fd;
};
static inline struct platform_private *impl_from_DEVICE_OBJECT(DEVICE_OBJECT *device)
{
return (struct platform_private *)get_platform_private(device);
}
static DWORD get_sysattr_dword(struct udev_device *dev, const char *sysattr, int base)
{
const char *attr = udev_device_get_sysattr_value(dev, sysattr);
if (!attr)
{
WARN("Could not get %s from device\n", sysattr);
return 0;
}
return strtol(attr, NULL, base);
}
static WCHAR *get_sysattr_string(struct udev_device *dev, const char *sysattr)
{
const char *attr = udev_device_get_sysattr_value(dev, sysattr);
WCHAR *dst;
DWORD len;
if (!attr)
{
WARN("Could not get %s from device\n", sysattr);
return NULL;
}
len = MultiByteToWideChar(CP_UNIXCP, 0, attr, -1, NULL, 0);
if ((dst = HeapAlloc(GetProcessHeap(), 0, len * sizeof(WCHAR))))
MultiByteToWideChar(CP_UNIXCP, 0, attr, -1, dst, len);
return dst;
}
static int compare_platform_device(DEVICE_OBJECT *device, void *platform_dev)
{
struct udev_device *dev1 = impl_from_DEVICE_OBJECT(device)->udev_device;
struct udev_device *dev2 = platform_dev;
return strcmp(udev_device_get_syspath(dev1), udev_device_get_syspath(dev2));
}
static NTSTATUS hidraw_get_reportdescriptor(DEVICE_OBJECT *device, BYTE *buffer, DWORD length, DWORD *out_length)
{
#ifdef HAVE_LINUX_HIDRAW_H
struct hidraw_report_descriptor descriptor;
struct platform_private *private = impl_from_DEVICE_OBJECT(device);
if (ioctl(private->device_fd, HIDIOCGRDESCSIZE, &descriptor.size) == -1)
{
WARN("ioctl(HIDIOCGRDESCSIZE) failed: %d %s\n", errno, strerror(errno));
return STATUS_UNSUCCESSFUL;
}
*out_length = descriptor.size;
if (length < descriptor.size)
return STATUS_BUFFER_TOO_SMALL;
if (!descriptor.size)
return STATUS_SUCCESS;
if (ioctl(private->device_fd, HIDIOCGRDESC, &descriptor) == -1)
{
WARN("ioctl(HIDIOCGRDESC) failed: %d %s\n", errno, strerror(errno));
return STATUS_UNSUCCESSFUL;
}
memcpy(buffer, descriptor.value, descriptor.size);
return STATUS_SUCCESS;
#else
return STATUS_NOT_IMPLEMENTED;
#endif
}
static const platform_vtbl hidraw_vtbl =
{
compare_platform_device,
hidraw_get_reportdescriptor,
};
static void try_add_device(struct udev_device *dev)
{
DWORD vid = 0, pid = 0, version = 0;
struct udev_device *usbdev;
DEVICE_OBJECT *device = NULL;
const char *subsystem;
const char *devnode;
WCHAR *serial = NULL;
int fd;
if (!(devnode = udev_device_get_devnode(dev)))
return;
if ((fd = open(devnode, O_RDWR)) == -1)
{
WARN("Unable to open udev device %s: %s\n", debugstr_a(devnode), strerror(errno));
return;
}
usbdev = udev_device_get_parent_with_subsystem_devtype(dev, "usb", "usb_device");
if (usbdev)
{
vid = get_sysattr_dword(usbdev, "idVendor", 16);
pid = get_sysattr_dword(usbdev, "idProduct", 16);
version = get_sysattr_dword(usbdev, "version", 10);
serial = get_sysattr_string(usbdev, "serial");
}
TRACE("Found udev device %s (vid %04x, pid %04x, version %u, serial %s)\n",
debugstr_a(devnode), vid, pid, version, debugstr_w(serial));
subsystem = udev_device_get_subsystem(dev);
if (strcmp(subsystem, "hidraw") == 0)
{
device = bus_create_hid_device(udev_driver_obj, hidraw_busidW, vid, pid, version, 0, serial, FALSE,
&GUID_DEVCLASS_HIDRAW, &hidraw_vtbl, sizeof(struct platform_private));
}
if (device)
{
struct platform_private *private = impl_from_DEVICE_OBJECT(device);
private->udev_device = udev_device_ref(dev);
private->device_fd = fd;
IoInvalidateDeviceRelations(device, BusRelations);
}
else
{
WARN("Ignoring device %s with subsystem %s\n", debugstr_a(devnode), subsystem);
close(fd);
}
HeapFree(GetProcessHeap(), 0, serial);
}
static void try_remove_device(struct udev_device *dev)
{
DEVICE_OBJECT *device = bus_find_hid_device(&hidraw_vtbl, dev);
struct platform_private *private;
if (!device) return;
private = impl_from_DEVICE_OBJECT(device);
dev = private->udev_device;
close(private->device_fd);
bus_remove_hid_device(device);
udev_device_unref(dev);
}
static void build_initial_deviceset(void)
{
struct udev_enumerate *enumerate;
struct udev_list_entry *devices, *dev_list_entry;
enumerate = udev_enumerate_new(udev_context);
if (!enumerate)
{
WARN("Unable to create udev enumeration object\n");
return;
}
if (udev_enumerate_add_match_subsystem(enumerate, "hidraw") < 0)
WARN("Failed to add subsystem 'hidraw' to enumeration\n");
if (udev_enumerate_scan_devices(enumerate) < 0)
WARN("Enumeration scan failed\n");
devices = udev_enumerate_get_list_entry(enumerate);
udev_list_entry_foreach(dev_list_entry, devices)
{
struct udev_device *dev;
const char *path;
path = udev_list_entry_get_name(dev_list_entry);
if ((dev = udev_device_new_from_syspath(udev_context, path)))
{
try_add_device(dev);
udev_device_unref(dev);
}
}
udev_enumerate_unref(enumerate);
}
static struct udev_monitor *create_monitor(struct pollfd *pfd)
{
struct udev_monitor *monitor;
monitor = udev_monitor_new_from_netlink(udev_context, "udev");
if (!monitor)
{
WARN("Unable to get udev monitor object\n");
return NULL;
}
if (udev_monitor_filter_add_match_subsystem_devtype(monitor, "hidraw", NULL) < 0)
WARN("Failed to add subsystem 'hidraw' to monitor\n");
if (udev_monitor_enable_receiving(monitor) < 0)
goto error;
if ((pfd->fd = udev_monitor_get_fd(monitor)) >= 0)
{
pfd->events = POLLIN;
return monitor;
}
error:
WARN("Failed to start monitoring\n");
udev_monitor_unref(monitor);
return NULL;
}
static void process_monitor_event(struct udev_monitor *monitor)
{
struct udev_device *dev;
const char *action;
dev = udev_monitor_receive_device(monitor);
if (!dev)
{
FIXME("Failed to get device that has changed\n");
return;
}
action = udev_device_get_action(dev);
TRACE("Received action %s for udev device %s\n", debugstr_a(action),
debugstr_a(udev_device_get_devnode(dev)));
if (!action)
WARN("No action received\n");
else if (strcmp(action, "add") == 0)
try_add_device(dev);
else if (strcmp(action, "remove") == 0)
try_remove_device(dev);
else
WARN("Unhandled action %s\n", debugstr_a(action));
udev_device_unref(dev);
}
static DWORD CALLBACK deviceloop_thread(void *args)
{
struct udev_monitor *monitor;
HANDLE init_done = args;
struct pollfd pfd;
monitor = create_monitor(&pfd);
build_initial_deviceset();
SetEvent(init_done);
while (monitor)
{
if (poll(&pfd, 1, -1) <= 0) continue;
process_monitor_event(monitor);
}
TRACE("Monitor thread exiting\n");
if (monitor)
udev_monitor_unref(monitor);
return 0;
}
NTSTATUS WINAPI udev_driver_init(DRIVER_OBJECT *driver, UNICODE_STRING *registry_path)
{
HANDLE events[2];
DWORD result;
TRACE("(%p, %s)\n", driver, debugstr_w(registry_path->Buffer));
if (!(udev_context = udev_new()))
{
ERR("Can't create udev object\n");
return STATUS_UNSUCCESSFUL;
}
udev_driver_obj = driver;
driver->MajorFunction[IRP_MJ_PNP] = common_pnp_dispatch;
driver->MajorFunction[IRP_MJ_INTERNAL_DEVICE_CONTROL] = hid_internal_dispatch;
if (!(events[0] = CreateEventW(NULL, TRUE, FALSE, NULL)))
goto error;
if (!(events[1] = CreateThread(NULL, 0, deviceloop_thread, events[0], 0, NULL)))
{
CloseHandle(events[0]);
goto error;
}
result = WaitForMultipleObjects(2, events, FALSE, INFINITE);
CloseHandle(events[0]);
CloseHandle(events[1]);
if (result == WAIT_OBJECT_0)
{
TRACE("Initialization successful\n");
return STATUS_SUCCESS;
}
error:
ERR("Failed to initialize udev device thread\n");
udev_unref(udev_context);
udev_context = NULL;
udev_driver_obj = NULL;
return STATUS_UNSUCCESSFUL;
}
#else
NTSTATUS WINAPI udev_driver_init(DRIVER_OBJECT *driver, UNICODE_STRING *registry_path)
{
WARN("Wine was compiled without UDEV support\n");
return STATUS_NOT_IMPLEMENTED;
}
#endif /* HAVE_UDEV */
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