957e4ab0b5
We don't want to spend time creating devices that are unncessesary during early (init first-stage) mount. So, refactor the devices code tha allows us to call into coldboot and has the - ability to only create devices that are specified by the caller - ability to stop coldboot cycle when all devices that the caller is interested in - ability to run coldboot for a specific syspath - ability to run ueventd code unmodified Test: Tested boot on angler, sailfish Change-Id: Id8f3492380696760414eadc20d624d300c904f8e Signed-off-by: Sandeep Patil <sspatil@google.com>
63 lines
2.1 KiB
C++
63 lines
2.1 KiB
C++
/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _INIT_DEVICES_H
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#define _INIT_DEVICES_H
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#include <functional>
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#include <sys/stat.h>
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enum coldboot_action_t {
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// coldboot continues without creating the device for the uevent
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COLDBOOT_CONTINUE = 0,
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// coldboot continues after creating the device for the uevent
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COLDBOOT_CREATE,
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// coldboot stops after creating the device for uevent but doesn't
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// create the COLDBOOT_DONE file
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COLDBOOT_STOP,
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// same as COLDBOOT_STOP, but creates the COLDBOOT_DONE file
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COLDBOOT_FINISH
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};
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struct uevent {
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const char* action;
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const char* path;
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const char* subsystem;
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const char* firmware;
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const char* partition_name;
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const char* device_name;
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int partition_num;
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int major;
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int minor;
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};
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typedef std::function<coldboot_action_t(struct uevent* uevent)> coldboot_callback;
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extern coldboot_action_t handle_device_fd(coldboot_callback fn = nullptr);
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extern void device_init(const char* path = nullptr, coldboot_callback fn = nullptr);
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enum early_device_type { EARLY_BLOCK_DEV, EARLY_CHAR_DEV };
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extern int early_device_socket_open();
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extern void early_device_socket_close();
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extern void early_create_dev(const std::string& syspath, early_device_type dev_type);
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extern int add_dev_perms(const char *name, const char *attr,
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mode_t perm, unsigned int uid,
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unsigned int gid, unsigned short prefix,
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unsigned short wildcard);
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int get_device_fd();
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#endif /* _INIT_DEVICES_H */
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