83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
126 lines
3.6 KiB
C
126 lines
3.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* (C) Copyright 2011 - 2012 Samsung Electronics
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* EXT4 filesystem implementation in Uboot by
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* Uma Shankar <uma.shankar@samsung.com>
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* Manjunatha C Achar <a.manjunatha@samsung.com>
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*
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* Journal data structures and headers for Journaling feature of ext4
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* have been referred from JBD2 (Journaling Block device 2)
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* implementation in Linux Kernel.
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*
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* Written by Stephen C. Tweedie <sct@redhat.com>
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*
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* Copyright 1998-2000 Red Hat, Inc --- All Rights Reserved
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*/
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#ifndef __EXT4_JRNL__
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#define __EXT4_JRNL__
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#define EXT2_JOURNAL_INO 8 /* Journal inode */
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#define EXT2_JOURNAL_SUPERBLOCK 0 /* Journal Superblock number */
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#define JBD2_FEATURE_COMPAT_CHECKSUM 0x00000001
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#define EXT3_JOURNAL_MAGIC_NUMBER 0xc03b3998U
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#define TRANSACTION_RUNNING 1
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#define TRANSACTION_COMPLETE 0
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#define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */
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#define EXT3_JOURNAL_DESCRIPTOR_BLOCK 1
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#define EXT3_JOURNAL_COMMIT_BLOCK 2
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#define EXT3_JOURNAL_SUPERBLOCK_V1 3
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#define EXT3_JOURNAL_SUPERBLOCK_V2 4
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#define EXT3_JOURNAL_REVOKE_BLOCK 5
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#define EXT3_JOURNAL_FLAG_ESCAPE 1
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#define EXT3_JOURNAL_FLAG_SAME_UUID 2
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#define EXT3_JOURNAL_FLAG_DELETED 4
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#define EXT3_JOURNAL_FLAG_LAST_TAG 8
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/* Maximum entries in 1 journal transaction */
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#define MAX_JOURNAL_ENTRIES 100
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struct journal_log {
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char *buf;
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int blknr;
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};
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struct dirty_blocks {
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char *buf;
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int blknr;
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};
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/* Standard header for all descriptor blocks: */
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struct journal_header_t {
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__be32 h_magic;
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__be32 h_blocktype;
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__be32 h_sequence;
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};
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/* The journal superblock. All fields are in big-endian byte order. */
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struct journal_superblock_t {
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/* 0x0000 */
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struct journal_header_t s_header;
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/* Static information describing the journal */
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__be32 s_blocksize; /* journal device blocksize */
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__be32 s_maxlen; /* total blocks in journal file */
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__be32 s_first; /* first block of log information */
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/* Dynamic information describing the current state of the log */
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__be32 s_sequence; /* first commit ID expected in log */
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__be32 s_start; /* blocknr of start of log */
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/* Error value, as set by journal_abort(). */
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__be32 s_errno;
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/* Remaining fields are only valid in a version-2 superblock */
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__be32 s_feature_compat; /* compatible feature set */
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__be32 s_feature_incompat; /* incompatible feature set */
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__be32 s_feature_ro_compat; /* readonly-compatible feature set */
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/* 0x0030 */
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__u8 s_uuid[16]; /* 128-bit uuid for journal */
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/* 0x0040 */
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__be32 s_nr_users; /* Nr of filesystems sharing log */
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__be32 s_dynsuper; /* Blocknr of dynamic superblock copy */
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/* 0x0048 */
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__be32 s_max_transaction; /* Limit of journal blocks per trans. */
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__be32 s_max_trans_data; /* Limit of data blocks per trans. */
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/* 0x0050 */
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__be32 s_padding[44];
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/* 0x0100 */
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__u8 s_users[16 * 48]; /* ids of all fs'es sharing the log */
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/* 0x0400 */
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} ;
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struct ext3_journal_block_tag {
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__be32 block;
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__be32 flags;
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};
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struct journal_revoke_header_t {
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struct journal_header_t r_header;
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__be32 r_count; /* Count of bytes used in the block */
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};
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struct revoke_blk_list {
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char *content; /* revoke block itself */
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struct revoke_blk_list *next;
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};
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extern struct ext2_data *ext4fs_root;
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int ext4fs_init_journal(void);
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int ext4fs_log_gdt(char *gd_table);
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int ext4fs_check_journal_state(int recovery_flag);
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int ext4fs_log_journal(char *journal_buffer, uint32_t blknr);
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int ext4fs_put_metadata(char *metadata_buffer, uint32_t blknr);
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void ext4fs_update_journal(void);
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void ext4fs_dump_metadata(void);
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void ext4fs_push_revoke_blk(char *buffer);
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void ext4fs_free_journal(void);
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void ext4fs_free_revoke_blks(void);
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#endif
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