From ae51f41d14f548d494ac41e0d21137c5a4c3f59c Mon Sep 17 00:00:00 2001 From: Iru Cai Date: Wed, 30 Oct 2019 14:21:52 +0800 Subject: import the U-Boot code and make it compile --- ext4_journal.h | 127 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 127 insertions(+) create mode 100644 ext4_journal.h (limited to 'ext4_journal.h') diff --git a/ext4_journal.h b/ext4_journal.h new file mode 100644 index 0000000..43fb8e7 --- /dev/null +++ b/ext4_journal.h @@ -0,0 +1,127 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * (C) Copyright 2011 - 2012 Samsung Electronics + * EXT4 filesystem implementation in Uboot by + * Uma Shankar + * Manjunatha C Achar + * + * 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 + * + * Copyright 1998-2000 Red Hat, Inc --- All Rights Reserved + */ + +#ifndef __EXT4_JRNL__ +#define __EXT4_JRNL__ + +#define EXT4_FEATURE_COMPAT_HAS_JOURNAL 0x0004 + +#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 -- cgit v1.2.3