LXR uboot/fs/ext4/ext4

   1/* SPDX-License-Identifier: GPL-2.0+ */
   2/*
   3 * (C) Copyright 2011 - 2012 Samsung Electronics
   4 * EXT4 filesystem implementation in Uboot by
   5 * Uma Shankar <uma.shankar@samsung.com>
   6 * Manjunatha C Achar <a.manjunatha@samsung.com>
   7 *
   8 * ext4ls and ext4load :  based on ext2 ls load support in Uboot.
   9 *
  10 * (C) Copyright 2004
  11 * esd gmbh <www.esd-electronics.com>
  12 * Reinhard Arlt <reinhard.arlt@esd-electronics.com>
  13 *
  14 * based on code from grub2 fs/ext2.c and fs/fshelp.c by
  15 * GRUB  --  GRand Unified Bootloader
  16 * Copyright (C) 2003, 2004  Free Software Foundation, Inc.
  17 *
  18 * ext4write : Based on generic ext4 protocol.
  19 */
  20
  21#ifndef __EXT4_COMMON__
  22#define __EXT4_COMMON__
  23#include <ext_common.h>
  24#include <ext4fs.h>
  25#include <malloc.h>
  26#include <asm/cache.h>
  27#include <linux/errno.h>
  28#if defined(CONFIG_EXT4_WRITE)
  29#include "ext4_journal.h"
  30#include "crc16.h"
  31#endif
  32
  33#define YES             1
  34#define NO              0
  35#define RECOVER 1
  36#define SCAN            0
  37
  38#define S_IFLNK         0120000         /* symbolic link */
  39#define BLOCK_NO_ONE            1
  40#define SUPERBLOCK_START        (2 * 512)
  41#define SUPERBLOCK_SIZE 1024
  42#define F_FILE                  1
  43
  44static inline void *zalloc(size_t size)
  45{
  46        void *p = memalign(ARCH_DMA_MINALIGN, size);
  47        memset(p, 0, size);
  48        return p;
  49}
  50
  51int ext4fs_read_inode(struct ext2_data *data, int ino,
  52                      struct ext2_inode *inode);
  53int ext4fs_read_file(struct ext2fs_node *node, loff_t pos, loff_t len,
  54                     char *buf, loff_t *actread);
  55int ext4fs_find_file(const char *path, struct ext2fs_node *rootnode,
  56                        struct ext2fs_node **foundnode, int expecttype);
  57int ext4fs_iterate_dir(struct ext2fs_node *dir, char *name,
  58                        struct ext2fs_node **fnode, int *ftype);
  59
  60#if defined(CONFIG_EXT4_WRITE)
  61uint32_t ext4fs_div_roundup(uint32_t size, uint32_t n);
  62uint16_t ext4fs_checksum_update(unsigned int i);
  63int ext4fs_get_parent_inode_num(const char *dirname, char *dname, int flags);
  64int ext4fs_update_parent_dentry(char *filename, int file_type);
  65uint32_t ext4fs_get_new_blk_no(void);
  66int ext4fs_get_new_inode_no(void);
  67void ext4fs_reset_block_bmap(long int blockno, unsigned char *buffer,
  68                                        int index);
  69int ext4fs_set_block_bmap(long int blockno, unsigned char *buffer, int index);
  70int ext4fs_set_inode_bmap(int inode_no, unsigned char *buffer, int index);
  71void ext4fs_reset_inode_bmap(int inode_no, unsigned char *buffer, int index);
  72int ext4fs_iget(int inode_no, struct ext2_inode *inode);
  73void ext4fs_allocate_blocks(struct ext2_inode *file_inode,
  74                                unsigned int total_remaining_blocks,
  75                                unsigned int *total_no_of_block);
  76void put_ext4(uint64_t off, const void *buf, uint32_t size);
  77struct ext2_block_group *ext4fs_get_group_descriptor
  78        (const struct ext_filesystem *fs, uint32_t bg_idx);
  79uint64_t ext4fs_bg_get_block_id(const struct ext2_block_group *bg,
  80        const struct ext_filesystem *fs);
  81uint64_t ext4fs_bg_get_inode_id(const struct ext2_block_group *bg,
  82        const struct ext_filesystem *fs);
  83uint64_t ext4fs_bg_get_inode_table_id(const struct ext2_block_group *bg,
  84        const struct ext_filesystem *fs);
  85uint64_t ext4fs_sb_get_free_blocks(const struct ext2_sblock *sb);
  86void ext4fs_sb_set_free_blocks(struct ext2_sblock *sb, uint64_t free_blocks);
  87uint32_t ext4fs_bg_get_free_blocks(const struct ext2_block_group *bg,
  88        const struct ext_filesystem *fs);
  89#endif
  90#endif
  91