142 lines
3.6 KiB
C
142 lines
3.6 KiB
C
/****************************************************************************
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****************************************************************************
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***
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*** This header was automatically generated from a Linux kernel header
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*** of the same name, to make information necessary for userspace to
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*** call into the kernel available to libc. It contains only constants,
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*** structures, and macros generated from the original header, and thus,
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*** contains no copyrightable information.
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***
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****************************************************************************
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****************************************************************************/
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#ifndef _LINUX_JBD2_H
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#define _LINUX_JBD2_H
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#define JBD2_DEBUG
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#define jfs_debug jbd_debug
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#define journal_oom_retry 1
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#undef JBD2_PARANOID_IOFAIL
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#define JBD2_DEFAULT_MAX_COMMIT_AGE 5
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#define jbd_debug(f, a...)
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#define JBD2_MIN_JOURNAL_BLOCKS 1024
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#define JBD2_MAGIC_NUMBER 0xc03b3998U
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#define JBD2_DESCRIPTOR_BLOCK 1
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#define JBD2_COMMIT_BLOCK 2
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#define JBD2_SUPERBLOCK_V1 3
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#define JBD2_SUPERBLOCK_V2 4
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#define JBD2_REVOKE_BLOCK 5
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typedef struct journal_header_s
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{
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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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} journal_header_t;
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#define JBD2_CRC32_CHKSUM 1
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#define JBD2_MD5_CHKSUM 2
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#define JBD2_SHA1_CHKSUM 3
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#define JBD2_CRC32_CHKSUM_SIZE 4
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#define JBD2_CHECKSUM_BYTES (32 / sizeof(__u32))
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struct commit_header {
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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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unsigned char h_chksum_type;
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unsigned char h_chksum_size;
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unsigned char h_padding[2];
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__be32 h_chksum[JBD2_CHECKSUM_BYTES];
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__be64 h_commit_sec;
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__be32 h_commit_nsec;
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};
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typedef struct journal_block_tag_s
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{
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__be32 t_blocknr;
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__be32 t_flags;
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__be32 t_blocknr_high;
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} journal_block_tag_t;
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#define JBD2_TAG_SIZE32 (offsetof(journal_block_tag_t, t_blocknr_high))
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#define JBD2_TAG_SIZE64 (sizeof(journal_block_tag_t))
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typedef struct jbd2_journal_revoke_header_s
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{
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journal_header_t r_header;
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__be32 r_count;
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} jbd2_journal_revoke_header_t;
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#define JBD2_FLAG_ESCAPE 1
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#define JBD2_FLAG_SAME_UUID 2
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#define JBD2_FLAG_DELETED 4
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#define JBD2_FLAG_LAST_TAG 8
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typedef struct journal_superblock_s
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{
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journal_header_t s_header;
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__be32 s_blocksize;
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__be32 s_maxlen;
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__be32 s_first;
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__be32 s_sequence;
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__be32 s_start;
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__be32 s_errno;
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__be32 s_feature_compat;
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__be32 s_feature_incompat;
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__be32 s_feature_ro_compat;
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__u8 s_uuid[16];
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__be32 s_nr_users;
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__be32 s_dynsuper;
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__be32 s_max_transaction;
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__be32 s_max_trans_data;
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__u32 s_padding[44];
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__u8 s_users[16*48];
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} journal_superblock_t;
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#define JBD2_HAS_COMPAT_FEATURE(j,mask) ((j)->j_format_version >= 2 && ((j)->j_superblock->s_feature_compat & cpu_to_be32((mask))))
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#define JBD2_HAS_RO_COMPAT_FEATURE(j,mask) ((j)->j_format_version >= 2 && ((j)->j_superblock->s_feature_ro_compat & cpu_to_be32((mask))))
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#define JBD2_HAS_INCOMPAT_FEATURE(j,mask) ((j)->j_format_version >= 2 && ((j)->j_superblock->s_feature_incompat & cpu_to_be32((mask))))
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#define JBD2_FEATURE_COMPAT_CHECKSUM 0x00000001
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#define JBD2_FEATURE_INCOMPAT_REVOKE 0x00000001
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#define JBD2_FEATURE_INCOMPAT_64BIT 0x00000002
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#define JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT 0x00000004
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#define JBD2_KNOWN_COMPAT_FEATURES JBD2_FEATURE_COMPAT_CHECKSUM
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#define JBD2_KNOWN_ROCOMPAT_FEATURES 0
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#define JBD2_KNOWN_INCOMPAT_FEATURES (JBD2_FEATURE_INCOMPAT_REVOKE | JBD2_FEATURE_INCOMPAT_64BIT | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT)
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#define BJ_None 0
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#define BJ_Metadata 1
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#define BJ_Forget 2
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#define BJ_IO 3
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#define BJ_Shadow 4
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#define BJ_LogCtl 5
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#define BJ_Reserved 6
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#define BJ_Types 7
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#endif
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