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      1 /****************************************************************************
      2  ****************************************************************************
      3  ***
      4  ***   This header was automatically generated from a Linux kernel header
      5  ***   of the same name, to make information necessary for userspace to
      6  ***   call into the kernel available to libc.  It contains only constants,
      7  ***   structures, and macros generated from the original header, and thus,
      8  ***   contains no copyrightable information.
      9  ***
     10  ****************************************************************************
     11  ****************************************************************************/
     12 #ifndef _LINUX_JBD_H
     13 #define _LINUX_JBD_H
     14 
     15 #include "jfs_compat.h"
     16 #define JFS_DEBUG
     17 #define jfs_debug jbd_debug
     18 
     19 #define journal_oom_retry 1
     20 
     21 #undef JBD_PARANOID_IOFAIL
     22 
     23 #define JBD_DEFAULT_MAX_COMMIT_AGE 5
     24 
     25 #define jbd_debug(f, a...)
     26 
     27 #define jbd_kmalloc(size, flags)   __jbd_kmalloc(__FUNCTION__, (size), (flags), journal_oom_retry)
     28 #define jbd_rep_kmalloc(size, flags)   __jbd_kmalloc(__FUNCTION__, (size), (flags), 1)
     29 
     30 #define JFS_MIN_JOURNAL_BLOCKS 1024
     31 
     32 #define JFS_MAGIC_NUMBER 0xc03b3998U
     33 
     34 #define JFS_DESCRIPTOR_BLOCK 1
     35 #define JFS_COMMIT_BLOCK 2
     36 #define JFS_SUPERBLOCK_V1 3
     37 #define JFS_SUPERBLOCK_V2 4
     38 #define JFS_REVOKE_BLOCK 5
     39 
     40 typedef struct journal_header_s
     41 {
     42  __be32 h_magic;
     43  __be32 h_blocktype;
     44  __be32 h_sequence;
     45 } journal_header_t;
     46 
     47 typedef struct journal_block_tag_s
     48 {
     49  __be32 t_blocknr;
     50  __be32 t_flags;
     51 } journal_block_tag_t;
     52 
     53 typedef struct journal_revoke_header_s
     54 {
     55  journal_header_t r_header;
     56  __be32 r_count;
     57 } journal_revoke_header_t;
     58 
     59 #define JFS_FLAG_ESCAPE 1
     60 #define JFS_FLAG_SAME_UUID 2
     61 #define JFS_FLAG_DELETED 4
     62 #define JFS_FLAG_LAST_TAG 8
     63 
     64 typedef struct journal_superblock_s
     65 {
     66 
     67  journal_header_t s_header;
     68 
     69  __be32 s_blocksize;
     70  __be32 s_maxlen;
     71  __be32 s_first;
     72 
     73  __be32 s_sequence;
     74  __be32 s_start;
     75 
     76  __be32 s_errno;
     77 
     78  __be32 s_feature_compat;
     79  __be32 s_feature_incompat;
     80  __be32 s_feature_ro_compat;
     81 
     82  __u8 s_uuid[16];
     83 
     84  __be32 s_nr_users;
     85 
     86  __be32 s_dynsuper;
     87 
     88  __be32 s_max_transaction;
     89  __be32 s_max_trans_data;
     90 
     91  __u32 s_padding[44];
     92 
     93  __u8 s_users[16*48];
     94 
     95 } journal_superblock_t;
     96 
     97 #define JFS_HAS_COMPAT_FEATURE(j,mask)   ((j)->j_format_version >= 2 &&   ((j)->j_superblock->s_feature_compat & cpu_to_be32((mask))))
     98 #define JFS_HAS_RO_COMPAT_FEATURE(j,mask)   ((j)->j_format_version >= 2 &&   ((j)->j_superblock->s_feature_ro_compat & cpu_to_be32((mask))))
     99 #define JFS_HAS_INCOMPAT_FEATURE(j,mask)   ((j)->j_format_version >= 2 &&   ((j)->j_superblock->s_feature_incompat & cpu_to_be32((mask))))
    100 
    101 #define JFS_FEATURE_INCOMPAT_REVOKE 0x00000001
    102 
    103 #define JFS_KNOWN_COMPAT_FEATURES 0
    104 #define JFS_KNOWN_ROCOMPAT_FEATURES 0
    105 #define JFS_KNOWN_INCOMPAT_FEATURES JFS_FEATURE_INCOMPAT_REVOKE
    106 
    107 #define BJ_None 0
    108 #define BJ_SyncData 1
    109 #define BJ_Metadata 2
    110 #define BJ_Forget 3
    111 #define BJ_IO 4
    112 #define BJ_Shadow 5
    113 #define BJ_LogCtl 6
    114 #define BJ_Reserved 7
    115 #define BJ_Locked 8
    116 #define BJ_Types 9
    117 
    118 #endif
    119