fs/ext4/ext4_common.h

   1 /*
   2  * (C) Copyright 2011 - 2012 Samsung Electronics
   3  * EXT4 filesystem implementation in Uboot by
   4  * Uma Shankar <uma.shankar@samsung.com>
   5  * Manjunatha C Achar <a.manjunatha@samsung.com>
   6  *
   7  * ext4ls and ext4load :  based on ext2 ls load support in Uboot.
   8  *
   9  * (C) Copyright 2004
  10  * esd gmbh <www.esd-electronics.com>
  11  * Reinhard Arlt <reinhard.arlt@esd-electronics.com>
  12  *
  13  * based on code from grub2 fs/ext2.c and fs/fshelp.c by
  14  * GRUB  --  GRand Unified Bootloader
  15  * Copyright (C) 2003, 2004  Free Software Foundation, Inc.
  16  *
  17  * ext4write : Based on generic ext4 protocol.
  18  *
  19  * SPDX-License-Identifier:     GPL-2.0+
  20  */
  21
  22 #ifndef __EXT4_COMMON__
  23 #define __EXT4_COMMON__
  24 #include <ext_common.h>
  25 #include <ext4fs.h>
  26 #include <malloc.h>
  27 #include <asm/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
  44 static 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
  51 int ext4fs_read_inode(struct ext2_data *data, int ino,
  52                       struct ext2_inode *inode);
  53 int ext4fs_read_file(struct ext2fs_node *node, loff_t pos, loff_t len,
  54                      char *buf, loff_t *actread);
  55 int ext4fs_find_file(const char *path, struct ext2fs_node *rootnode,
  56                         struct ext2fs_node **foundnode, int expecttype);
  57 int ext4fs_iterate_dir(struct ext2fs_node *dir, char *name,
  58                         struct ext2fs_node **fnode, int *ftype);
  59
  60 #if defined(CONFIG_EXT4_WRITE)
  61 uint32_t ext4fs_div_roundup(uint32_t size, uint32_t n);
  62 uint16_t ext4fs_checksum_update(unsigned int i);
  63 int ext4fs_get_parent_inode_num(const char *dirname, char *dname, int flags);
  64 int ext4fs_update_parent_dentry(char *filename, int file_type);
  65 uint32_t ext4fs_get_new_blk_no(void);
  66 int ext4fs_get_new_inode_no(void);
  67 void ext4fs_reset_block_bmap(long int blockno, unsigned char *buffer,
  68                                         int index);
  69 int ext4fs_set_block_bmap(long int blockno, unsigned char *buffer, int index);
  70 int ext4fs_set_inode_bmap(int inode_no, unsigned char *buffer, int index);
  71 void ext4fs_reset_inode_bmap(int inode_no, unsigned char *buffer, int index);
  72 int ext4fs_iget(int inode_no, struct ext2_inode *inode);
  73 void ext4fs_allocate_blocks(struct ext2_inode *file_inode,
  74                                 unsigned int total_remaining_blocks,
  75                                 unsigned int *total_no_of_block);
  76 void put_ext4(uint64_t off, void *buf, uint32_t size);
  77 struct ext2_block_group *ext4fs_get_group_descriptor
  78         (const struct ext_filesystem *fs, uint32_t bg_idx);
  79 uint64_t ext4fs_bg_get_block_id(const struct ext2_block_group *bg,
  80         const struct ext_filesystem *fs);
  81 uint64_t ext4fs_bg_get_inode_id(const struct ext2_block_group *bg,
  82         const struct ext_filesystem *fs);
  83 uint64_t ext4fs_bg_get_inode_table_id(const struct ext2_block_group *bg,
  84         const struct ext_filesystem *fs);
  85 uint64_t ext4fs_sb_get_free_blocks(const struct ext2_sblock *sb);
  86 void ext4fs_sb_set_free_blocks(struct ext2_sblock *sb, uint64_t free_blocks);
  87 uint32_t ext4fs_bg_get_free_blocks(const struct ext2_block_group *bg,
  88         const struct ext_filesystem *fs);
  89 #endif
  90 #endif