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/*
* 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 _EXT4_UTILS_H_
#define _EXT4_UTILS_H_
#ifdef __cplusplus
extern "C" {
#endif
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#define _FILE_OFFSET_BITS 64
#define _LARGEFILE64_SOURCE 1
#include <sys/types.h>
#include <unistd.h>
#include <sys/types.h>
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <setjmp.h>
#if defined(__APPLE__) && defined(__MACH__)
#define lseek64 lseek
#define ftruncate64 ftruncate
#define mmap64 mmap
#define off64_t off_t
#endif
#ifdef __BIONIC__
extern void* __mmap2(void *, size_t, int, int, int, off_t);
static inline void *mmap64(void *addr, size_t length, int prot, int flags,
int fd, off64_t offset)
{
return __mmap2(addr, length, prot, flags, fd, offset >> 12);
}
#endif
extern int force;
#define warn(fmt, args...) do { fprintf(stderr, "warning: %s: " fmt "\n", __func__, ## args); } while (0)
#define error(fmt, args...) do { fprintf(stderr, "error: %s: " fmt "\n", __func__, ## args); if (!force) longjmp(setjmp_env, EXIT_FAILURE); } while (0)
#define error_errno(s, args...) error(s ": %s", ##args, strerror(errno))
#define critical_error(fmt, args...) do { fprintf(stderr, "critical error: %s: " fmt "\n", __func__, ## args); longjmp(setjmp_env, EXIT_FAILURE); } while (0)
#define critical_error_errno(s, args...) critical_error(s ": %s", ##args, strerror(errno))
#define EXT4_SUPER_MAGIC 0xEF53
#define EXT4_JNL_BACKUP_BLOCKS 1
#ifndef min /* already defined by windows.h */
#define min(a, b) ((a) < (b) ? (a) : (b))
#endif
#define DIV_ROUND_UP(x, y) (((x) + (y) - 1)/(y))
#define ALIGN(x, y) ((y) * DIV_ROUND_UP((x), (y)))
#define __le64 u64
#define __le32 u32
#define __le16 u16
#define __be64 u64
#define __be32 u32
#define __be16 u16
#define __u64 u64
#define __u32 u32
#define __u16 u16
#define __u8 u8
typedef unsigned long long u64;
typedef signed long long s64;
typedef unsigned int u32;
typedef unsigned short int u16;
typedef unsigned char u8;
struct block_group_info;
struct ext2_group_desc {
__le32 bg_block_bitmap;
__le32 bg_inode_bitmap;
__le32 bg_inode_table;
__le16 bg_free_blocks_count;
__le16 bg_free_inodes_count;
__le16 bg_used_dirs_count;
__le16 bg_flags;
__le32 bg_reserved[2];
__le16 bg_reserved16;
__le16 bg_checksum;
};
struct fs_info {
s64 len; /* If set to 0, ask the block device for the size,
* if less than 0, reserve that much space at the
* end of the partition, else use the size given. */
u32 block_size;
u32 blocks_per_group;
u32 inodes_per_group;
u32 inode_size;
u32 inodes;
u32 journal_blocks;
u16 feat_ro_compat;
u16 feat_compat;
u16 feat_incompat;
u32 bg_desc_reserve_blocks;
const char *label;
u8 no_journal;
struct sparse_file *sparse_file;
};
struct fs_aux_info {
struct ext4_super_block *sb;
struct ext4_super_block **backup_sb;
struct ext2_group_desc *bg_desc;
struct block_group_info *bgs;
u32 first_data_block;
u64 len_blocks;
u32 inode_table_blocks;
u32 groups;
u32 bg_desc_blocks;
u32 default_i_flags;
u32 blocks_per_ind;
u32 blocks_per_dind;
u32 blocks_per_tind;
};
extern struct fs_info info;
extern struct fs_aux_info aux_info;
extern jmp_buf setjmp_env;
static inline int log_2(int j)
{
int i;
for (i = 0; j > 0; i++)
j >>= 1;
return i - 1;
}
int ext4_bg_has_super_block(int bg);
void write_ext4_image(int fd, int gz, int sparse, int crc);
void ext4_create_fs_aux_info(void);
void ext4_free_fs_aux_info(void);
void ext4_fill_in_sb(void);
void ext4_create_resize_inode(void);
void ext4_create_journal_inode(void);
void ext4_update_free(void);
void ext4_queue_sb(void);
u64 get_file_size(int fd);
u64 parse_num(const char *arg);
void ext4_parse_sb(struct ext4_super_block *sb);
u16 ext4_crc16(u16 crc_in, const void *buf, int size);
typedef void (*fs_config_func_t)(const char *path, int dir, unsigned *uid, unsigned *gid,
unsigned *mode);
struct selabel_handle;
int make_ext4fs_internal(int fd, const char *directory,
const char *mountpoint, fs_config_func_t fs_config_func, int gzip,
int sparse, int crc, int wipe,
struct selabel_handle *sehnd, int verbose);
#ifdef __cplusplus
}
#endif
#endif