xref: /system/extras/fatblock/fatblock.h

/*
 * Copyright (C) 2010 The Android Open Source Project
 *
 * 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.
 */

#ifndef FATBLOCK_H
#define FATBLOCK_H

#include <stdint.h>
#include <sys/types.h>

#include "fdpool.h"

typedef uint64_t offset_t;

typedef enum {
	EXTENT_TYPE_BOOT,
	EXTENT_TYPE_INFO,
	EXTENT_TYPE_FAT,
	EXTENT_TYPE_FILE,
	EXTENT_TYPE_DIR
} extent_type;

struct extent {
	offset_t start;
	offset_t len;
	extent_type type;

	struct extent *next;
};

struct file {
	struct extent extent;

	char *path;
	uint32_t size;

	dev_t dev;
	ino_t ino;
	time_t mtime;

	struct pooled_fd pfd;
};

struct dir {
	struct extent extent;

	char *path;
	uint32_t size;

	struct fat_dirent *entries;
};

struct fs;

int import_tree(struct fs *fs, char *path);
int fs_read(struct fs *fs, char *buf, offset_t start, offset_t len);

#define MALLOC_FAIL (-41)    /* memory allocation failed somewhere. */
#define SKY_IS_FALLING (-42) /* One of the files changed out from under us. */

#endif