/* SPDX-License-Identifier: GPL-2.0+ */
/* Copyright (C) 2014 AVM GmbH <fritzbox_info@avm.de> */
/*
 * cache.h
 *
 *  Created on: 10 Nov 2014
 *      Author: tklaassen
 */

#ifndef DRIVERS_CHAR_TFFS_3_0_TFFS_CACHE_H_
#define DRIVERS_CHAR_TFFS_3_0_TFFS_CACHE_H_

#include "local.h"

struct tffs_cache_entry;

struct tffs_cache_segment {
	struct list_head segment_list;
	struct tffs_cache_entry *entry;
	size_t len;
	char *data;
};

struct tffs_cache_entry {
	struct list_head entry_list;
	struct list_head segment_list;
	struct kref refcnt;
	enum _tffs_id id;
	uint32_t cache_seq;
	size_t max_seg_size;
};

struct tffs_cache_ctx;
struct tffs_cache_handle {
	struct tffs_cache_ctx *ctx;
	enum _tffs_id id;
	struct tffs_cache_entry *entry;
	struct tffs_cache_segment *segment;
	void *backend_handle;
	enum tffs3_handle_mode mode;
	size_t seg_offset;
	size_t total_offset;
};

struct tffs_cache_ctx {
	struct tffs_module *backend;
	struct list_head entry_list;
	struct list_head clear_list;
	spinlock_t list_lock;
	spinlock_t clear_lock;
	bool ram_only;
	void *notify_priv;
	tffs3_notify_fn notify_cb;
	volatile unsigned long panic_mode;
	struct tffs_cache_handle panic_handle;
	void *buf;
};

#endif /* DRIVERS_CHAR_TFFS_3_0_TFFS_CACHE_H_ */