Colin Cross | ec0a2e8 | 2010-06-11 14:21:37 -0700 | [diff] [blame] | 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_JBD2_H |
| 13 | #define _LINUX_JBD2_H |
| 14 | |
| 15 | #define JBD2_DEBUG |
| 16 | #define jfs_debug jbd_debug |
| 17 | |
| 18 | #define journal_oom_retry 1 |
| 19 | |
| 20 | #undef JBD2_PARANOID_IOFAIL |
| 21 | |
| 22 | #define JBD2_DEFAULT_MAX_COMMIT_AGE 5 |
| 23 | |
| 24 | #define jbd_debug(f, a...) |
| 25 | |
| 26 | #define JBD2_MIN_JOURNAL_BLOCKS 1024 |
| 27 | |
| 28 | #define JBD2_MAGIC_NUMBER 0xc03b3998U |
| 29 | |
| 30 | #define JBD2_DESCRIPTOR_BLOCK 1 |
| 31 | #define JBD2_COMMIT_BLOCK 2 |
| 32 | #define JBD2_SUPERBLOCK_V1 3 |
| 33 | #define JBD2_SUPERBLOCK_V2 4 |
| 34 | #define JBD2_REVOKE_BLOCK 5 |
| 35 | |
| 36 | typedef struct journal_header_s |
| 37 | { |
| 38 | __be32 h_magic; |
| 39 | __be32 h_blocktype; |
| 40 | __be32 h_sequence; |
| 41 | } journal_header_t; |
| 42 | |
| 43 | #define JBD2_CRC32_CHKSUM 1 |
| 44 | #define JBD2_MD5_CHKSUM 2 |
| 45 | #define JBD2_SHA1_CHKSUM 3 |
| 46 | |
| 47 | #define JBD2_CRC32_CHKSUM_SIZE 4 |
| 48 | |
Colin Cross | 7900c77 | 2014-01-23 12:53:30 -0800 | [diff] [blame] | 49 | #define JBD2_CHECKSUM_BYTES (32 / sizeof(__u32)) |
Colin Cross | ec0a2e8 | 2010-06-11 14:21:37 -0700 | [diff] [blame] | 50 | |
| 51 | struct commit_header { |
| 52 | __be32 h_magic; |
| 53 | __be32 h_blocktype; |
| 54 | __be32 h_sequence; |
| 55 | unsigned char h_chksum_type; |
| 56 | unsigned char h_chksum_size; |
| 57 | unsigned char h_padding[2]; |
| 58 | __be32 h_chksum[JBD2_CHECKSUM_BYTES]; |
| 59 | __be64 h_commit_sec; |
| 60 | __be32 h_commit_nsec; |
| 61 | }; |
| 62 | |
| 63 | typedef struct journal_block_tag_s |
| 64 | { |
| 65 | __be32 t_blocknr; |
| 66 | __be32 t_flags; |
| 67 | __be32 t_blocknr_high; |
| 68 | } journal_block_tag_t; |
| 69 | |
| 70 | #define JBD2_TAG_SIZE32 (offsetof(journal_block_tag_t, t_blocknr_high)) |
| 71 | #define JBD2_TAG_SIZE64 (sizeof(journal_block_tag_t)) |
| 72 | |
| 73 | typedef struct jbd2_journal_revoke_header_s |
| 74 | { |
| 75 | journal_header_t r_header; |
| 76 | __be32 r_count; |
| 77 | } jbd2_journal_revoke_header_t; |
| 78 | |
| 79 | #define JBD2_FLAG_ESCAPE 1 |
| 80 | #define JBD2_FLAG_SAME_UUID 2 |
| 81 | #define JBD2_FLAG_DELETED 4 |
| 82 | #define JBD2_FLAG_LAST_TAG 8 |
| 83 | |
| 84 | typedef struct journal_superblock_s |
| 85 | { |
| 86 | |
| 87 | journal_header_t s_header; |
| 88 | |
| 89 | __be32 s_blocksize; |
| 90 | __be32 s_maxlen; |
| 91 | __be32 s_first; |
| 92 | |
| 93 | __be32 s_sequence; |
| 94 | __be32 s_start; |
| 95 | |
| 96 | __be32 s_errno; |
| 97 | |
| 98 | __be32 s_feature_compat; |
| 99 | __be32 s_feature_incompat; |
| 100 | __be32 s_feature_ro_compat; |
| 101 | |
| 102 | __u8 s_uuid[16]; |
| 103 | |
| 104 | __be32 s_nr_users; |
| 105 | |
| 106 | __be32 s_dynsuper; |
| 107 | |
| 108 | __be32 s_max_transaction; |
| 109 | __be32 s_max_trans_data; |
| 110 | |
| 111 | __u32 s_padding[44]; |
| 112 | |
| 113 | __u8 s_users[16*48]; |
| 114 | |
| 115 | } journal_superblock_t; |
| 116 | |
| 117 | #define JBD2_HAS_COMPAT_FEATURE(j,mask) ((j)->j_format_version >= 2 && ((j)->j_superblock->s_feature_compat & cpu_to_be32((mask)))) |
| 118 | #define JBD2_HAS_RO_COMPAT_FEATURE(j,mask) ((j)->j_format_version >= 2 && ((j)->j_superblock->s_feature_ro_compat & cpu_to_be32((mask)))) |
| 119 | #define JBD2_HAS_INCOMPAT_FEATURE(j,mask) ((j)->j_format_version >= 2 && ((j)->j_superblock->s_feature_incompat & cpu_to_be32((mask)))) |
| 120 | |
| 121 | #define JBD2_FEATURE_COMPAT_CHECKSUM 0x00000001 |
| 122 | |
| 123 | #define JBD2_FEATURE_INCOMPAT_REVOKE 0x00000001 |
| 124 | #define JBD2_FEATURE_INCOMPAT_64BIT 0x00000002 |
| 125 | #define JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT 0x00000004 |
| 126 | |
| 127 | #define JBD2_KNOWN_COMPAT_FEATURES JBD2_FEATURE_COMPAT_CHECKSUM |
| 128 | #define JBD2_KNOWN_ROCOMPAT_FEATURES 0 |
| 129 | #define JBD2_KNOWN_INCOMPAT_FEATURES (JBD2_FEATURE_INCOMPAT_REVOKE | JBD2_FEATURE_INCOMPAT_64BIT | JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT) |
| 130 | |
| 131 | #define BJ_None 0 |
| 132 | #define BJ_Metadata 1 |
| 133 | #define BJ_Forget 2 |
| 134 | #define BJ_IO 3 |
| 135 | #define BJ_Shadow 4 |
| 136 | #define BJ_LogCtl 5 |
| 137 | #define BJ_Reserved 6 |
| 138 | #define BJ_Types 7 |
| 139 | |
| 140 | #endif |
| 141 | |