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xserver-multidpi/config/udev.c
Laércio de Sousa daa6d2d58f config/udev: distinguish between real keyboards and other key devices 
This patch introduces a new flag ATTR_KEY for hotplugged input devices,
so we can better distinguish between real keyboards (i.e. devices with
udev property ID_INPUT_KEYBOARD="1") and other key input devices like
lid switches, power buttons, etc.

All supported hotplug backends (udev, hal, and wscons) will set both
flags ATTR_KEY and ATTR_KEYBOARD for real keyboards, but udev backend
will set ATTR_KEY, but not ATTR_KEYBOARD, for non-keyboard key input
devices (hal and wscons will set both flags in any case). With this
distinction, kdrive input hotplugging mechanism will be allowed to only
grab real keyboards, as other key input devices are currently not
supported.

In order to don't break current behaviour, this patch will replace all
ATTR_KEYBOARD occurrences with ATTR_KEY in hw/xfree86/common/xf86Xinput.c.

[ajax: Just add ATTR_KEY, don't re-number the other attributes]

Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Laércio de Sousa <laerciosousa@sme-mogidascruzes.sp.gov.br>
2016-03-01 10:46:48 -05:00

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/*
* Copyright © 2009 Julien Cristau
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* Author: Julien Cristau <jcristau@debian.org>
*/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include <libudev.h>
#include <ctype.h>
#include <unistd.h>
#include "input.h"
#include "inputstr.h"
#include "hotplug.h"
#include "config-backends.h"
#include "os.h"
#include "globals.h"
#include "systemd-logind.h"
#define UDEV_XKB_PROP_KEY "xkb"
#define LOG_PROPERTY(path, prop, val) \
LogMessageVerb(X_INFO, 10, \
"config/udev: getting property %s on %s " \
"returned \"%s\"\n", \
(prop), (path), (val) ? (val) : "(null)")
#define LOG_SYSATTR(path, attr, val) \
LogMessageVerb(X_INFO, 10, \
"config/udev: getting attribute %s on %s " \
"returned \"%s\"\n", \
(attr), (path), (val) ? (val) : "(null)")
static struct udev_monitor *udev_monitor;
#ifdef CONFIG_UDEV_KMS
static void
config_udev_odev_setup_attribs(const char *path, const char *syspath,
int major, int minor,
config_odev_probe_proc_ptr probe_callback);
#endif
static char itoa_buf[16];
static const char *itoa(int i)
{
snprintf(itoa_buf, sizeof(itoa_buf), "%d", i);
return itoa_buf;
}
static Bool
check_seat(struct udev_device *udev_device)
{
const char *dev_seat;
dev_seat = udev_device_get_property_value(udev_device, "ID_SEAT");
if (!dev_seat)
dev_seat = "seat0";
if (SeatId && strcmp(dev_seat, SeatId))
return FALSE;
if (!SeatId && strcmp(dev_seat, "seat0"))
return FALSE;
return TRUE;
}
static void
device_added(struct udev_device *udev_device)
{
const char *path, *name = NULL;
char *config_info = NULL;
const char *syspath;
const char *tags_prop;
const char *key, *value, *tmp;
InputOption *input_options;
InputAttributes attrs = { };
DeviceIntPtr dev = NULL;
struct udev_list_entry *set, *entry;
struct udev_device *parent;
int rc;
dev_t devnum;
path = udev_device_get_devnode(udev_device);
syspath = udev_device_get_syspath(udev_device);
if (!path || !syspath)
return;
if (!check_seat(udev_device))
return;
devnum = udev_device_get_devnum(udev_device);
#ifdef CONFIG_UDEV_KMS
if (!strcmp(udev_device_get_subsystem(udev_device), "drm")) {
const char *sysname = udev_device_get_sysname(udev_device);
if (strncmp(sysname, "card", 4) != 0)
return;
/* Check for devices already added through xf86platformProbe() */
if (xf86_find_platform_device_by_devnum(major(devnum), minor(devnum)))
return;
LogMessage(X_INFO, "config/udev: Adding drm device (%s)\n", path);
config_udev_odev_setup_attribs(path, syspath, major(devnum),
minor(devnum), NewGPUDeviceRequest);
return;
}
#endif
if (!udev_device_get_property_value(udev_device, "ID_INPUT")) {
LogMessageVerb(X_INFO, 10,
"config/udev: ignoring device %s without "
"property ID_INPUT set\n", path);
return;
}
input_options = input_option_new(NULL, "_source", "server/udev");
if (!input_options)
return;
parent = udev_device_get_parent(udev_device);
if (parent) {
const char *ppath = udev_device_get_devnode(parent);
const char *product = udev_device_get_property_value(parent, "PRODUCT");
const char *pnp_id = udev_device_get_sysattr_value(parent, "id");
unsigned int usb_vendor, usb_model;
name = udev_device_get_sysattr_value(parent, "name");
LOG_SYSATTR(ppath, "name", name);
if (!name) {
name = udev_device_get_property_value(parent, "NAME");
LOG_PROPERTY(ppath, "NAME", name);
}
/* construct USB ID in lowercase hex - "0000:ffff" */
if (product &&
sscanf(product, "%*x/%4x/%4x/%*x", &usb_vendor, &usb_model) == 2) {
char *usb_id;
if (asprintf(&usb_id, "%04x:%04x", usb_vendor, usb_model)
== -1)
usb_id = NULL;
else
LOG_PROPERTY(ppath, "PRODUCT", product);
attrs.usb_id = usb_id;
}
while (!pnp_id && (parent = udev_device_get_parent(parent))) {
pnp_id = udev_device_get_sysattr_value(parent, "id");
if (!pnp_id)
continue;
attrs.pnp_id = strdup(pnp_id);
ppath = udev_device_get_devnode(parent);
LOG_SYSATTR(ppath, "id", pnp_id);
}
}
if (!name)
name = "(unnamed)";
else
attrs.product = strdup(name);
input_options = input_option_new(input_options, "name", name);
input_options = input_option_new(input_options, "path", path);
input_options = input_option_new(input_options, "device", path);
input_options = input_option_new(input_options, "major", itoa(major(devnum)));
input_options = input_option_new(input_options, "minor", itoa(minor(devnum)));
if (path)
attrs.device = strdup(path);
tags_prop = udev_device_get_property_value(udev_device, "ID_INPUT.tags");
LOG_PROPERTY(path, "ID_INPUT.tags", tags_prop);
attrs.tags = xstrtokenize(tags_prop, ",");
if (asprintf(&config_info, "udev:%s", syspath) == -1) {
config_info = NULL;
goto unwind;
}
if (device_is_duplicate(config_info)) {
LogMessage(X_WARNING, "config/udev: device %s already added. "
"Ignoring.\n", name);
goto unwind;
}
set = udev_device_get_properties_list_entry(udev_device);
udev_list_entry_foreach(entry, set) {
key = udev_list_entry_get_name(entry);
if (!key)
continue;
value = udev_list_entry_get_value(entry);
if (!strncasecmp(key, UDEV_XKB_PROP_KEY, sizeof(UDEV_XKB_PROP_KEY) - 1)) {
LOG_PROPERTY(path, key, value);
tmp = key + sizeof(UDEV_XKB_PROP_KEY) - 1;
if (!strcasecmp(tmp, "rules"))
input_options =
input_option_new(input_options, "xkb_rules", value);
else if (!strcasecmp(tmp, "layout"))
input_options =
input_option_new(input_options, "xkb_layout", value);
else if (!strcasecmp(tmp, "variant"))
input_options =
input_option_new(input_options, "xkb_variant", value);
else if (!strcasecmp(tmp, "model"))
input_options =
input_option_new(input_options, "xkb_model", value);
else if (!strcasecmp(tmp, "options"))
input_options =
input_option_new(input_options, "xkb_options", value);
}
else if (!strcmp(key, "ID_VENDOR")) {
LOG_PROPERTY(path, key, value);
attrs.vendor = strdup(value);
}
else if (!strcmp(key, "ID_INPUT_KEY")) {
LOG_PROPERTY(path, key, value);
attrs.flags |= ATTR_KEY;
}
else if (!strcmp(key, "ID_INPUT_KEYBOARD")) {
LOG_PROPERTY(path, key, value);
attrs.flags |= ATTR_KEYBOARD;
}
else if (!strcmp(key, "ID_INPUT_MOUSE")) {
LOG_PROPERTY(path, key, value);
attrs.flags |= ATTR_POINTER;
}
else if (!strcmp(key, "ID_INPUT_JOYSTICK")) {
LOG_PROPERTY(path, key, value);
attrs.flags |= ATTR_JOYSTICK;
}
else if (!strcmp(key, "ID_INPUT_TABLET")) {
LOG_PROPERTY(path, key, value);
attrs.flags |= ATTR_TABLET;
}
else if (!strcmp(key, "ID_INPUT_TOUCHPAD")) {
LOG_PROPERTY(path, key, value);
attrs.flags |= ATTR_TOUCHPAD;
}
else if (!strcmp(key, "ID_INPUT_TOUCHSCREEN")) {
LOG_PROPERTY(path, key, value);
attrs.flags |= ATTR_TOUCHSCREEN;
}
}
input_options = input_option_new(input_options, "config_info", config_info);
/* Default setting needed for non-seat0 seats */
if (ServerIsNotSeat0())
input_options = input_option_new(input_options, "GrabDevice", "on");
LogMessage(X_INFO, "config/udev: Adding input device %s (%s)\n",
name, path);
rc = NewInputDeviceRequest(input_options, &attrs, &dev);
if (rc != Success)
goto unwind;
unwind:
free(config_info);
input_option_free_list(&input_options);
free(attrs.usb_id);
free(attrs.pnp_id);
free(attrs.product);
free(attrs.device);
free(attrs.vendor);
if (attrs.tags) {
char **tag = attrs.tags;
while (*tag) {
free(*tag);
tag++;
}
free(attrs.tags);
}
return;
}
static void
device_removed(struct udev_device *device)
{
char *value;
const char *syspath = udev_device_get_syspath(device);
#ifdef CONFIG_UDEV_KMS
if (!strcmp(udev_device_get_subsystem(device), "drm")) {
const char *sysname = udev_device_get_sysname(device);
const char *path = udev_device_get_devnode(device);
dev_t devnum = udev_device_get_devnum(device);
if ((strncmp(sysname,"card", 4) != 0) || (path == NULL))
return;
LogMessage(X_INFO, "config/udev: removing GPU device %s %s\n",
syspath, path);
config_udev_odev_setup_attribs(path, syspath, major(devnum),
minor(devnum), DeleteGPUDeviceRequest);
/* Retry vtenter after a drm node removal */
systemd_logind_vtenter();
return;
}
#endif
if (asprintf(&value, "udev:%s", syspath) == -1)
return;
remove_devices("udev", value);
free(value);
}
static void
socket_handler(int fd, int ready, void *data)
{
struct udev_device *udev_device;
const char *action;
udev_device = udev_monitor_receive_device(udev_monitor);
if (!udev_device)
return;
action = udev_device_get_action(udev_device);
if (action) {
if (!strcmp(action, "add")) {
device_removed(udev_device);
device_added(udev_device);
} else if (!strcmp(action, "change")) {
/* ignore change for the drm devices */
if (strcmp(udev_device_get_subsystem(udev_device), "drm")) {
device_removed(udev_device);
device_added(udev_device);
}
}
else if (!strcmp(action, "remove"))
device_removed(udev_device);
}
udev_device_unref(udev_device);
}
int
config_udev_pre_init(void)
{
struct udev *udev;
udev = udev_new();
if (!udev)
return 0;
udev_monitor = udev_monitor_new_from_netlink(udev, "udev");
if (!udev_monitor)
return 0;
udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "input",
NULL);
/* For Wacom serial devices */
udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "tty", NULL);
#ifdef CONFIG_UDEV_KMS
/* For output GPU devices */
udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "drm", NULL);
#endif
#ifdef HAVE_UDEV_MONITOR_FILTER_ADD_MATCH_TAG
if (ServerIsNotSeat0())
udev_monitor_filter_add_match_tag(udev_monitor, SeatId);
#endif
if (udev_monitor_enable_receiving(udev_monitor)) {
ErrorF("config/udev: failed to bind the udev monitor\n");
return 0;
}
return 1;
}
int
config_udev_init(void)
{
struct udev *udev;
struct udev_enumerate *enumerate;
struct udev_list_entry *devices, *device;
udev = udev_monitor_get_udev(udev_monitor);
enumerate = udev_enumerate_new(udev);
if (!enumerate)
return 0;
udev_enumerate_add_match_subsystem(enumerate, "input");
udev_enumerate_add_match_subsystem(enumerate, "tty");
#ifdef CONFIG_UDEV_KMS
udev_enumerate_add_match_subsystem(enumerate, "drm");
#endif
#ifdef HAVE_UDEV_ENUMERATE_ADD_MATCH_TAG
if (ServerIsNotSeat0())
udev_enumerate_add_match_tag(enumerate, SeatId);
#endif
udev_enumerate_scan_devices(enumerate);
devices = udev_enumerate_get_list_entry(enumerate);
udev_list_entry_foreach(device, devices) {
const char *syspath = udev_list_entry_get_name(device);
struct udev_device *udev_device =
udev_device_new_from_syspath(udev, syspath);
/* Device might be gone by the time we try to open it */
if (!udev_device)
continue;
device_added(udev_device);
udev_device_unref(udev_device);
}
udev_enumerate_unref(enumerate);
SetNotifyFd(udev_monitor_get_fd(udev_monitor), socket_handler, X_NOTIFY_READ, NULL);
return 1;
}
void
config_udev_fini(void)
{
struct udev *udev;
if (!udev_monitor)
return;
udev = udev_monitor_get_udev(udev_monitor);
RemoveNotifyFd(udev_monitor_get_fd(udev_monitor));
udev_monitor_unref(udev_monitor);
udev_monitor = NULL;
udev_unref(udev);
}
#ifdef CONFIG_UDEV_KMS
static void
config_udev_odev_setup_attribs(const char *path, const char *syspath,
int major, int minor,
config_odev_probe_proc_ptr probe_callback)
{
struct OdevAttributes *attribs = config_odev_allocate_attributes();
attribs->path = XNFstrdup(path);
attribs->syspath = XNFstrdup(syspath);
attribs->major = major;
attribs->minor = minor;
/* ownership of attribs is passed to probe layer */
probe_callback(attribs);
}
void
config_udev_odev_probe(config_odev_probe_proc_ptr probe_callback)
{
struct udev *udev;
struct udev_enumerate *enumerate;
struct udev_list_entry *devices, *device;
udev = udev_monitor_get_udev(udev_monitor);
enumerate = udev_enumerate_new(udev);
if (!enumerate)
return;
udev_enumerate_add_match_subsystem(enumerate, "drm");
udev_enumerate_add_match_sysname(enumerate, "card[0-9]*");
#ifdef HAVE_UDEV_ENUMERATE_ADD_MATCH_TAG
if (ServerIsNotSeat0())
udev_enumerate_add_match_tag(enumerate, SeatId);
#endif
udev_enumerate_scan_devices(enumerate);
devices = udev_enumerate_get_list_entry(enumerate);
udev_list_entry_foreach(device, devices) {
const char *syspath = udev_list_entry_get_name(device);
struct udev_device *udev_device = udev_device_new_from_syspath(udev, syspath);
const char *path = udev_device_get_devnode(udev_device);
const char *sysname = udev_device_get_sysname(udev_device);
dev_t devnum = udev_device_get_devnum(udev_device);
if (!path || !syspath)
goto no_probe;
else if (strcmp(udev_device_get_subsystem(udev_device), "drm") != 0)
goto no_probe;
else if (strncmp(sysname, "card", 4) != 0)
goto no_probe;
else if (!check_seat(udev_device))
goto no_probe;
config_udev_odev_setup_attribs(path, syspath, major(devnum),
minor(devnum), probe_callback);
no_probe:
udev_device_unref(udev_device);
}
udev_enumerate_unref(enumerate);
return;
}
#endif
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