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ab3416c61f
In a container with a non-trivial user namespace, we cannot rely on libudev communicating with udevd as a way to monitor device nodes, for the following reasons: * If uid 0 from the host is not mapped to uid 0 in the container, libudev cannot authenticate netlink messages from the host, because their sender uid appears to be the overflowuid. Resolving this by mapping uid 0 into the container is not allowed when creating user namespaces as an unprivileged user, and even when running as a privileged user, it might be desirable for the real uid 0 to not be mapped as a way to harden the security boundary between container and host. * Depending on the container configuration, initial enumeration might not be able to read /run/udev from the host system. If it can't, sysfs attributes will still work because those are read directly from the kernel via sysfs, but udev properties coming from user-space rules (in particular ID_INPUT_JOYSTICK and friends) will appear to be missing. * The protocols between udevd and libudev (netlink messages for monitoring, and /run/udev for initial enumeration) are considered to be private to a particular version of udev, and are not a stable API; but in a container, we cannot expect that our copy of libudev is at exactly the same version as udevd on the host system. Sidestep this by adding a code path that continues to use libudev for the parts that work regardless of whether udevd is running or can be communicated with. Signed-off-by: Rémi Bernon <rbernon@codeweavers.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>
146 lines
3 KiB
C
146 lines
3 KiB
C
/*
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* Copyright 2021 Rémi Bernon for CodeWeavers
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#ifndef __WINEBUS_UNIXLIB_H
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#define __WINEBUS_UNIXLIB_H
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#include <stdarg.h>
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#include <windef.h>
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#include <winbase.h>
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#include <winternl.h>
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#include <ddk/hidclass.h>
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#include <hidusage.h>
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#include "wine/debug.h"
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#include "wine/list.h"
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struct device_desc
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{
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DWORD vid;
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DWORD pid;
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DWORD version;
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DWORD input;
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DWORD uid;
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BOOL is_gamepad;
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WCHAR manufacturer[MAX_PATH];
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WCHAR product[MAX_PATH];
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WCHAR serialnumber[MAX_PATH];
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};
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struct sdl_bus_options
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{
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BOOL map_controllers;
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/* freed after bus_init */
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DWORD mappings_count;
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char **mappings;
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};
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struct udev_bus_options
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{
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BOOL disable_hidraw;
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BOOL disable_input;
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BOOL disable_udevd;
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};
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struct iohid_bus_options
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{
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};
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struct unix_device;
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enum bus_event_type
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{
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BUS_EVENT_TYPE_NONE,
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BUS_EVENT_TYPE_DEVICE_REMOVED,
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BUS_EVENT_TYPE_DEVICE_CREATED,
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BUS_EVENT_TYPE_INPUT_REPORT,
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};
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struct bus_event
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{
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enum bus_event_type type;
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struct list entry;
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struct unix_device *device;
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union
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{
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struct
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{
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struct device_desc desc;
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} device_created;
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struct
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{
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USHORT length;
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BYTE buffer[1];
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} input_report;
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};
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};
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struct device_create_params
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{
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struct device_desc desc;
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struct unix_device *device;
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};
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struct device_descriptor_params
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{
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struct unix_device *iface;
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BYTE *buffer;
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DWORD length;
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DWORD *out_length;
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};
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struct device_report_params
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{
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struct unix_device *iface;
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HID_XFER_PACKET *packet;
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IO_STATUS_BLOCK *io;
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};
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enum unix_funcs
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{
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sdl_init,
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sdl_wait,
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sdl_stop,
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udev_init,
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udev_wait,
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udev_stop,
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iohid_init,
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iohid_wait,
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iohid_stop,
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mouse_create,
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keyboard_create,
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device_remove,
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device_start,
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device_get_report_descriptor,
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device_set_output_report,
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device_get_feature_report,
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device_set_feature_report,
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};
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static inline const char *debugstr_device_desc(struct device_desc *desc)
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{
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if (!desc) return "(null)";
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return wine_dbg_sprintf("{vid %04x, pid %04x, version %04x, input %d, uid %08x, is_gamepad %u}",
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desc->vid, desc->pid, desc->version, desc->input, desc->uid, desc->is_gamepad);
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}
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#endif /* __WINEBUS_UNIXLIB_H */
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