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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* erofs_utils/include/erofs/internal.h
*
* Copyright (C) 2019 HUAWEI, Inc.
* http://www.huawei.com/
* Created by Gao Xiang <gaoxiang25@huawei.com>
*/
#ifndef __EROFS_INTERNAL_H
#define __EROFS_INTERNAL_H
#include "list.h"
#include "err.h"
typedef unsigned short umode_t;
#define __packed __attribute__((__packed__))
#include "erofs_fs.h"
#include <fcntl.h>
#ifndef PATH_MAX
#define PATH_MAX 4096 /* # chars in a path name including nul */
#endif
#define PAGE_SHIFT (12)
#define PAGE_SIZE (1U << PAGE_SHIFT)
#define LOG_BLOCK_SIZE (12)
#define EROFS_BLKSIZ (1U << LOG_BLOCK_SIZE)
#define EROFS_ISLOTBITS 5
#define EROFS_SLOTSIZE (1U << EROFS_ISLOTBITS)
typedef u64 erofs_off_t;
typedef u64 erofs_nid_t;
/* data type for filesystem-wide blocks number */
typedef u32 erofs_blk_t;
#define NULL_ADDR ((unsigned int)-1)
#define NULL_ADDR_UL ((unsigned long)-1)
#define erofs_blknr(addr) ((addr) / EROFS_BLKSIZ)
#define erofs_blkoff(addr) ((addr) % EROFS_BLKSIZ)
#define blknr_to_addr(nr) ((erofs_off_t)(nr) * EROFS_BLKSIZ)
#define BLK_ROUND_UP(addr) DIV_ROUND_UP(addr, EROFS_BLKSIZ)
struct erofs_buffer_head;
struct erofs_sb_info {
erofs_blk_t meta_blkaddr;
erofs_blk_t xattr_blkaddr;
u32 feature_incompat;
u64 build_time;
u32 build_time_nsec;
};
/* global sbi */
extern struct erofs_sb_info sbi;
struct erofs_inode {
struct list_head i_hash, i_subdirs, i_xattrs;
unsigned int i_count;
struct erofs_inode *i_parent;
umode_t i_mode;
erofs_off_t i_size;
u64 i_ino[2];
u32 i_uid;
u32 i_gid;
u64 i_ctime;
u32 i_ctime_nsec;
u32 i_nlink;
union {
u32 i_blkaddr;
u32 i_blocks;
u32 i_rdev;
} u;
char i_srcpath[PATH_MAX + 1];
unsigned char datalayout;
unsigned char inode_isize;
/* inline tail-end packing size */
unsigned short idata_size;
unsigned int xattr_isize;
unsigned int extent_isize;
erofs_nid_t nid;
struct erofs_buffer_head *bh;
struct erofs_buffer_head *bh_inline, *bh_data;
void *idata;
void *compressmeta;
};
static inline bool is_inode_layout_compression(struct erofs_inode *inode)
{
return erofs_inode_is_data_compressed(inode->datalayout);
}
#define IS_ROOT(x) ((x) == (x)->i_parent)
struct erofs_dentry {
struct list_head d_child; /* child of parent list */
unsigned int type;
char name[EROFS_NAME_LEN];
union {
struct erofs_inode *inode;
erofs_nid_t nid;
};
};
static inline bool is_dot_dotdot(const char *name)
{
if (name[0] != '.')
return false;
return name[1] == '\0' || (name[1] == '.' && name[2] == '\0');
}
#include <stdio.h>
#include <string.h>
static inline const char *erofs_strerror(int err)
{
static char msg[256];
sprintf(msg, "[Error %d] %s", -err, strerror(-err));
return msg;
}
#endif
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