58a9ecbaf4
All fields were accessed directly instead of using the proper byte swap functions. Thus, ext4 write support was only usable on little-endian architectures. Fix this. Signed-off-by: Michael Walle <michael@walle.cc>
126 lines
3.6 KiB
C
126 lines
3.6 KiB
C
/*
|
|
* (C) Copyright 2011 - 2012 Samsung Electronics
|
|
* EXT4 filesystem implementation in Uboot by
|
|
* Uma Shankar <uma.shankar@samsung.com>
|
|
* Manjunatha C Achar <a.manjunatha@samsung.com>
|
|
*
|
|
* Journal data structures and headers for Journaling feature of ext4
|
|
* have been referred from JBD2 (Journaling Block device 2)
|
|
* implementation in Linux Kernel.
|
|
*
|
|
* Written by Stephen C. Tweedie <sct@redhat.com>
|
|
*
|
|
* Copyright 1998-2000 Red Hat, Inc --- All Rights Reserved
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#ifndef __EXT4_JRNL__
|
|
#define __EXT4_JRNL__
|
|
|
|
#define EXT2_JOURNAL_INO 8 /* Journal inode */
|
|
#define EXT2_JOURNAL_SUPERBLOCK 0 /* Journal Superblock number */
|
|
|
|
#define JBD2_FEATURE_COMPAT_CHECKSUM 0x00000001
|
|
#define EXT3_JOURNAL_MAGIC_NUMBER 0xc03b3998U
|
|
#define TRANSACTION_RUNNING 1
|
|
#define TRANSACTION_COMPLETE 0
|
|
#define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */
|
|
#define EXT3_JOURNAL_DESCRIPTOR_BLOCK 1
|
|
#define EXT3_JOURNAL_COMMIT_BLOCK 2
|
|
#define EXT3_JOURNAL_SUPERBLOCK_V1 3
|
|
#define EXT3_JOURNAL_SUPERBLOCK_V2 4
|
|
#define EXT3_JOURNAL_REVOKE_BLOCK 5
|
|
#define EXT3_JOURNAL_FLAG_ESCAPE 1
|
|
#define EXT3_JOURNAL_FLAG_SAME_UUID 2
|
|
#define EXT3_JOURNAL_FLAG_DELETED 4
|
|
#define EXT3_JOURNAL_FLAG_LAST_TAG 8
|
|
|
|
/* Maximum entries in 1 journal transaction */
|
|
#define MAX_JOURNAL_ENTRIES 100
|
|
struct journal_log {
|
|
char *buf;
|
|
int blknr;
|
|
};
|
|
|
|
struct dirty_blocks {
|
|
char *buf;
|
|
int blknr;
|
|
};
|
|
|
|
/* Standard header for all descriptor blocks: */
|
|
struct journal_header_t {
|
|
__be32 h_magic;
|
|
__be32 h_blocktype;
|
|
__be32 h_sequence;
|
|
};
|
|
|
|
/* The journal superblock. All fields are in big-endian byte order. */
|
|
struct journal_superblock_t {
|
|
/* 0x0000 */
|
|
struct journal_header_t s_header;
|
|
|
|
/* Static information describing the journal */
|
|
__be32 s_blocksize; /* journal device blocksize */
|
|
__be32 s_maxlen; /* total blocks in journal file */
|
|
__be32 s_first; /* first block of log information */
|
|
|
|
/* Dynamic information describing the current state of the log */
|
|
__be32 s_sequence; /* first commit ID expected in log */
|
|
__be32 s_start; /* blocknr of start of log */
|
|
|
|
/* Error value, as set by journal_abort(). */
|
|
__be32 s_errno;
|
|
|
|
/* Remaining fields are only valid in a version-2 superblock */
|
|
__be32 s_feature_compat; /* compatible feature set */
|
|
__be32 s_feature_incompat; /* incompatible feature set */
|
|
__be32 s_feature_ro_compat; /* readonly-compatible feature set */
|
|
/* 0x0030 */
|
|
__u8 s_uuid[16]; /* 128-bit uuid for journal */
|
|
|
|
/* 0x0040 */
|
|
__be32 s_nr_users; /* Nr of filesystems sharing log */
|
|
|
|
__be32 s_dynsuper; /* Blocknr of dynamic superblock copy */
|
|
|
|
/* 0x0048 */
|
|
__be32 s_max_transaction; /* Limit of journal blocks per trans. */
|
|
__be32 s_max_trans_data; /* Limit of data blocks per trans. */
|
|
|
|
/* 0x0050 */
|
|
__be32 s_padding[44];
|
|
|
|
/* 0x0100 */
|
|
__u8 s_users[16 * 48]; /* ids of all fs'es sharing the log */
|
|
/* 0x0400 */
|
|
} ;
|
|
|
|
struct ext3_journal_block_tag {
|
|
__be32 block;
|
|
__be32 flags;
|
|
};
|
|
|
|
struct journal_revoke_header_t {
|
|
struct journal_header_t r_header;
|
|
__be32 r_count; /* Count of bytes used in the block */
|
|
};
|
|
|
|
struct revoke_blk_list {
|
|
char *content; /* revoke block itself */
|
|
struct revoke_blk_list *next;
|
|
};
|
|
|
|
extern struct ext2_data *ext4fs_root;
|
|
|
|
int ext4fs_init_journal(void);
|
|
int ext4fs_log_gdt(char *gd_table);
|
|
int ext4fs_check_journal_state(int recovery_flag);
|
|
int ext4fs_log_journal(char *journal_buffer, uint32_t blknr);
|
|
int ext4fs_put_metadata(char *metadata_buffer, uint32_t blknr);
|
|
void ext4fs_update_journal(void);
|
|
void ext4fs_dump_metadata(void);
|
|
void ext4fs_push_revoke_blk(char *buffer);
|
|
void ext4fs_free_journal(void);
|
|
void ext4fs_free_revoke_blks(void);
|
|
#endif
|