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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2025, Google LLC.
* Pasha Tatashin <pasha.tatashin@soleen.com>
*/
#ifndef _LINUX_LUO_INTERNAL_H
#define _LINUX_LUO_INTERNAL_H
#include <linux/liveupdate.h>
/*
* Handles a deserialization failure: devices and memory is in unpredictable
* state.
*
* Continuing the boot process after a failure is dangerous because it could
* lead to leaks of private data.
*/
#define luo_restore_fail(__fmt, ...) panic(__fmt, ##__VA_ARGS__)
/**
* struct luo_session - Represents an active or incoming Live Update session.
* @name: A unique name for this session, used for identification and
* retrieval.
* @ser: Pointer to the serialized data for this session.
* @list: A list_head member used to link this session into a global list
* of either outgoing (to be preserved) or incoming (restored from
* previous kernel) sessions.
* @retrieved: A boolean flag indicating whether this session has been
* retrieved by a consumer in the new kernel.
* @mutex: protects fields in the luo_session.
*/
struct luo_session {
char name[LIVEUPDATE_SESSION_NAME_LENGTH];
struct luo_session_ser *ser;
struct list_head list;
bool retrieved;
struct mutex mutex;
};
int luo_session_create(const char *name, struct file **filep);
int luo_session_retrieve(const char *name, struct file **filep);
int __init luo_session_setup_outgoing(void *fdt);
int __init luo_session_setup_incoming(void *fdt);
int luo_session_serialize(void);
int luo_session_deserialize(void);
bool luo_session_quiesce(void);
void luo_session_resume(void);
#endif /* _LINUX_LUO_INTERNAL_H */
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