+++ /dev/null
-/*
- * device-manager
- *
- * Copyright (c) 2015 Samsung Electronics Co., Ltd.
- *
- * Licensed under the Apache License, Version 2.0 (the License);
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-
-#include <stdio.h>
-#include <stdbool.h>
-#include <errno.h>
-#include <libudev.h>
-#include <glib.h>
-#include <string.h>
-
-#include "udev.h"
-
-#include </hal/include/device/hal-backend-common.h>
-
-#define EVENT_KERNEL "kernel"
-#define EVENT_UDEV "udev"
-
-#define UDEV_MONITOR_SIZE (128*1024)
-
-struct uevent_info {
- struct udev_monitor *mon;
- GIOChannel *ch;
- guint eventid;
- GList *event_list;
-};
-
-
-/* Uevent */
-static struct udev *udev;
-static struct uevent_info kevent; /* kernel */
-static struct uevent_info uevent; /* udev */
-
-static gboolean uevent_control_cb(GIOChannel *channel,
- GIOCondition cond, void *data)
-{
- struct uevent_info *info = data;
- struct udev_device *dev;
- struct uevent_handler *l;
- GList *elem;
- const char *subsystem;
- int len;
-
- if (!info) {
- _E("data is invalid");
- return TRUE;
- }
-
- dev = udev_monitor_receive_device(info->mon);
- if (!dev)
- return TRUE;
-
- subsystem = udev_device_get_subsystem(dev);
- if (!subsystem)
- goto out;
-
- len = strlen(subsystem);
-
- for (elem = info->event_list ; elem ; elem = g_list_next(elem)) {
- l = elem->data;
- if (!l)
- continue;
- if (!strncmp(l->subsystem, subsystem, len) &&
- l->uevent_func)
- l->uevent_func(dev);
- }
-
-out:
- udev_device_unref(dev);
- return TRUE;
-}
-
-static int uevent_control_stop(struct uevent_info *info)
-{
- struct udev_device *dev;
-
- if (!info)
- return -EINVAL;
-
- if (info->eventid) {
- g_source_remove(info->eventid);
- info->eventid = 0;
- }
- if (info->ch) {
- g_io_channel_unref(info->ch);
- info->ch = NULL;
- }
- if (info->mon) {
- dev = udev_monitor_receive_device(info->mon);
- if (dev)
- udev_device_unref(dev);
- udev_monitor_unref(info->mon);
- info->mon = NULL;
- }
- if (udev)
- udev = udev_unref(udev);
- return 0;
-}
-
-static int uevent_control_start(const char *type,
- struct uevent_info *info)
-{
- struct uevent_handler *l;
- GList *elem;
- int fd;
- int ret;
-
- if (!info)
- return -EINVAL;
-
- if (info->mon) {
- _E("%s uevent control routine is alreay started", type);
- return -EINVAL;
- }
-
- if (!udev) {
- udev = udev_new();
- if (!udev) {
- _E("error create udev");
- return -EINVAL;
- }
- } else
- udev = udev_ref(udev);
-
- info->mon = udev_monitor_new_from_netlink(udev, type);
- if (info->mon == NULL) {
- _E("error udev_monitor create");
- goto stop;
- }
-
- _I("Set udev monitor buffer size %d", UDEV_MONITOR_SIZE);
- ret = udev_monitor_set_receive_buffer_size(info->mon,
- UDEV_MONITOR_SIZE);
- if (ret != 0) {
- _E("fail to set receive buffer size");
- goto stop;
- }
-
- for (elem = info->event_list ; elem ; elem = g_list_next(elem)) {
- l = elem->data;
- ret = udev_monitor_filter_add_match_subsystem_devtype(
- info->mon,
- l->subsystem, NULL);
- if (ret < 0) {
- _E("error apply subsystem filter");
- goto stop;
- }
- }
-
- ret = udev_monitor_filter_update(info->mon);
- if (ret < 0)
- _E("error udev_monitor_filter_update");
-
- fd = udev_monitor_get_fd(info->mon);
- if (fd == -1) {
- _E("error udev_monitor_get_fd");
- goto stop;
- }
-
- info->ch = g_io_channel_unix_new(fd);
- info->eventid = g_io_add_watch(info->ch,
- G_IO_IN, uevent_control_cb, info);
- if (info->eventid == 0) {
- _E("Failed to add channel watch");
- goto stop;
- }
-
- if (udev_monitor_enable_receiving(info->mon) < 0) {
- _E("error unable to subscribe to udev events");
- goto stop;
- }
-
- return 0;
-stop:
- uevent_control_stop(info);
- return -EINVAL;
-}
-
-int uevent_control_kernel_start(void)
-{
- return uevent_control_start(EVENT_KERNEL, &kevent);
-}
-
-void uevent_control_kernel_stop(void)
-{
- uevent_control_stop(&kevent);
-}
-
-int uevent_control_udev_start(void)
-{
- return uevent_control_start(EVENT_UDEV, &uevent);
-}
-
-void uevent_control_udev_stop(void)
-{
- uevent_control_stop(&uevent);
-}
-
-static int register_uevent_control(struct uevent_info *info,
- struct uevent_handler *uh)
-{
- struct uevent_handler *l;
- GList *elem;
- int r;
- bool matched = false;
- int len;
-
- if (!info || !uh || !uh->subsystem)
- return -EINVAL;
-
- /* if udev is not initialized, it just will be added list */
- if (!udev || !info->mon)
- goto add_list;
-
- len = strlen(uh->subsystem);
- /* check if the same subsystem is already added */
- for (elem = info->event_list; elem ; elem = g_list_next(elem)) {
- l = elem->data;
- if (!strncmp(l->subsystem, uh->subsystem, len)) {
- matched = true;
- break;
- }
- }
-
- /* the first request to add subsystem */
- if (!matched) {
- r = udev_monitor_filter_add_match_subsystem_devtype(info->mon,
- uh->subsystem, NULL);
- if (r < 0) {
- _E("fail to add %s subsystem : %d", uh->subsystem, r);
- return -EPERM;
- }
- }
-
- r = udev_monitor_filter_update(info->mon);
- if (r < 0)
- _E("fail to update udev monitor filter : %d", r);
-
-add_list:
- info->event_list = g_list_append(info->event_list, uh);
- return 0;
-}
-
-static int unregister_uevent_control(struct uevent_info *info,
- const struct uevent_handler *uh)
-{
- struct uevent_handler *l;
- GList *n, *next;
- int len;
-
- if (!info || !uh || !uh->subsystem)
- return -EINVAL;
-
- len = strlen(uh->subsystem);
- for (n = info->event_list, next = g_list_next(n) ;
- n ; n = next, next = g_list_next(n)) {
- l = n->data;
- if (!strncmp(l->subsystem, uh->subsystem, len) &&
- l->uevent_func == uh->uevent_func) {
- info->event_list = g_list_delete_link(info->event_list, n);
- return 0;
- }
- }
-
- return -ENOENT;
-}
-
-int register_kernel_event_control(struct uevent_handler *uh)
-{
- return register_uevent_control(&kevent, uh);
-}
-
-void unregister_kernel_event_control(struct uevent_handler *uh)
-{
- unregister_uevent_control(&kevent, uh);
-}
-
-int register_udev_event_control(struct uevent_handler *uh)
-{
- return register_uevent_control(&uevent, uh);
-}
-
-void unregister_udev_event_control(struct uevent_handler *uh)
-{
- unregister_uevent_control(&uevent, uh);
-}
projects / platform / hal / backend / tw3 / device-tw3.git / commitdiff