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/compat.h>
28 #include <linux/errno.h>
29 #if defined(CONFIG_EXT4_WRITE)
30 #include "ext4_journal.h"
31 #include <linux/crc16.h>
32 #endif
33
34 #define YES 1
35 #define NO 0
36 #define RECOVER 1
37 #define SCAN 0
38
39 #define S_IFLNK 0120000 /* symbolic link */
40 #define BLOCK_NO_ONE 1
41 #define SUPERBLOCK_START (2 * 512)
42 #define SUPERBLOCK_SIZE 1024
43 #define F_FILE 1
44
zalloc(size_t size)45 static inline void *zalloc(size_t size)
46 {
47 return kzalloc(size, 0);
48 }
49
50 int ext4fs_read_inode(struct ext2_data *data, int ino,
51 struct ext2_inode *inode);
52 int ext4fs_read_file(struct ext2fs_node *node, loff_t pos, loff_t len,
53 char *buf, loff_t *actread);
54 int ext4fs_find_file(const char *path, struct ext2fs_node *rootnode,
55 struct ext2fs_node **foundnode, int expecttype);
56 int ext4fs_find_file1(const char *currpath, struct ext2fs_node *currroot,
57 struct ext2fs_node **currfound, int *foundtype);
58 int ext4fs_iterate_dir(struct ext2fs_node *dir, char *name,
59 struct ext2fs_node **fnode, int *ftype);
60
61 #if defined(CONFIG_EXT4_WRITE)
62 uint32_t ext4fs_div_roundup(uint32_t size, uint32_t n);
63 uint16_t ext4fs_checksum_update(unsigned int i);
64 int ext4fs_get_parent_inode_num(const char *dirname, char *dname, int flags);
65 int ext4fs_update_parent_dentry(char *filename, int file_type);
66 uint32_t ext4fs_get_new_blk_no(void);
67 int ext4fs_get_new_inode_no(void);
68 void ext4fs_reset_block_bmap(long int blockno, unsigned char *buffer,
69 int index);
70 int ext4fs_set_block_bmap(long int blockno, unsigned char *buffer, int index);
71 int ext4fs_set_inode_bmap(int inode_no, unsigned char *buffer, int index);
72 void ext4fs_reset_inode_bmap(int inode_no, unsigned char *buffer, int index);
73 int ext4fs_iget(int inode_no, struct ext2_inode *inode);
74 void ext4fs_allocate_blocks(struct ext2_inode *file_inode,
75 unsigned int total_remaining_blocks,
76 unsigned int *total_no_of_block);
77 void put_ext4(uint64_t off, const void *buf, uint32_t size);
78 struct ext2_block_group *ext4fs_get_group_descriptor
79 (const struct ext_filesystem *fs, uint32_t bg_idx);
80 uint64_t ext4fs_bg_get_block_id(const struct ext2_block_group *bg,
81 const struct ext_filesystem *fs);
82 uint64_t ext4fs_bg_get_inode_id(const struct ext2_block_group *bg,
83 const struct ext_filesystem *fs);
84 uint64_t ext4fs_bg_get_inode_table_id(const struct ext2_block_group *bg,
85 const struct ext_filesystem *fs);
86 uint64_t ext4fs_sb_get_free_blocks(const struct ext2_sblock *sb);
87 void ext4fs_sb_set_free_blocks(struct ext2_sblock *sb, uint64_t free_blocks);
88 uint32_t ext4fs_bg_get_free_blocks(const struct ext2_block_group *bg,
89 const struct ext_filesystem *fs);
90 #endif
91 #endif
92