Changeset b53a733 in mainline for uspace/lib/ext4/libext4_superblock.h


Ignore:
Timestamp:
2012-03-07T09:33:14Z (12 years ago)
Author:
Frantisek Princ <frantisek.princ@…>
Branches:
lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export
Children:
e2629b08
Parents:
a872fc09
Message:

Data types definitions groupped to one file

File:
1 edited

Legend:

Unmodified
Added
Removed

  • uspace/lib/ext4/libext4_superblock.h

    ra872fc09 rb53a733  
    3737#include <sys/types.h>
    3838
    39 /*
    40  * Structure of the super block
    41  */
    42 typedef struct ext4_superblock {
    43         uint32_t inodes_count; // Inodes count
    44         uint32_t blocks_count_lo; // Blocks count
    45         uint32_t reserved_blocks_count_lo; // Reserved blocks count
    46         uint32_t free_blocks_count_lo; // Free blocks count
    47         uint32_t free_inodes_count; // Free inodes count
    48         uint32_t first_data_block; // First Data Block
    49         uint32_t log_block_size; // Block size
    50         uint32_t obso_log_frag_size; // Obsoleted fragment size
    51         uint32_t blocks_per_group; // Number of blocks per group
    52         uint32_t obso_frags_per_group; // Obsoleted fragments per group
    53         uint32_t inodes_per_group; // Number of inodes per group
    54         uint32_t mount_time; // Mount time
    55         uint32_t write_time; // Write time
    56         uint16_t mount_count; // Mount count
    57         uint16_t max_mount_count; // Maximal mount count
    58         uint16_t magic; // Magic signature
    59         uint16_t state; // File system state
    60         uint16_t errors; // Behaviour when detecting errors
    61         uint16_t minor_rev_level; // Minor revision level
    62         uint32_t last_check_time; // Time of last check
    63         uint32_t check_interval; // Maximum time between checks
    64         uint32_t creator_os; // Creator OS
    65         uint32_t rev_level; // Revision level
    66         uint16_t def_resuid; // Default uid for reserved blocks
    67         uint16_t def_resgid; // Default gid for reserved blocks
    68 
    69         // Fields for EXT4_DYNAMIC_REV superblocks only.
    70         uint32_t first_inode; // First non-reserved inode
    71         uint16_t inode_size; // Size of inode structure
    72         uint16_t block_group_number; // Block group number of this superblock
    73         uint32_t features_compatible; // Compatible feature set
    74         uint32_t features_incompatible; // Incompatible feature set
    75         uint32_t features_read_only; // Readonly-compatible feature set
    76         uint8_t uuid[16]; // 128-bit uuid for volume
    77         char volume_name[16]; // Volume name
    78         char last_mounted[64]; // Directory where last mounted
    79         uint32_t algorithm_usage_bitmap; // For compression
    80 
    81         /*
    82          * Performance hints. Directory preallocation should only
    83          * happen if the EXT4_FEATURE_COMPAT_DIR_PREALLOC flag is on.
    84          */
    85         uint8_t s_prealloc_blocks; // Number of blocks to try to preallocate
    86         uint8_t s_prealloc_dir_blocks; // Number to preallocate for dirs
    87         uint16_t s_reserved_gdt_blocks; // Per group desc for online growth
    88 
    89         /*
    90          * Journaling support valid if EXT4_FEATURE_COMPAT_HAS_JOURNAL set.
    91          */
    92         uint8_t journal_uuid[16]; // UUID of journal superblock
    93         uint32_t journal_inode_number; // Inode number of journal file
    94         uint32_t journal_dev; // Device number of journal file
    95         uint32_t last_orphan; // Head of list of inodes to delete
    96         uint32_t hash_seed[4]; // HTREE hash seed
    97         uint8_t default_hash_version; // Default hash version to use
    98         uint8_t journal_backup_type;
    99         uint16_t desc_size; // Size of group descriptor
    100         uint32_t default_mount_opts; // Default mount options
    101         uint32_t first_meta_bg; // First metablock block group
    102         uint32_t mkfs_time; // When the filesystem was created
    103         uint32_t journal_blocks[17]; // Backup of the journal inode
    104 
    105         /* 64bit support valid if EXT4_FEATURE_COMPAT_64BIT */
    106         uint32_t blocks_count_hi; // Blocks count
    107         uint32_t reserved_blocks_count_hi; // Reserved blocks count
    108         uint32_t free_blocks_count_hi; // Free blocks count
    109         uint16_t min_extra_isize; // All inodes have at least # bytes
    110         uint16_t want_extra_isize; // New inodes should reserve # bytes
    111         uint32_t flags; // Miscellaneous flags
    112         uint16_t raid_stride; // RAID stride
    113         uint16_t mmp_interval; // # seconds to wait in MMP checking
    114         uint64_t mmp_block; // Block for multi-mount protection
    115         uint32_t raid_stripe_width; // blocks on all data disks (N*stride)
    116         uint8_t log_groups_per_flex; // FLEX_BG group size
    117         uint8_t reserved_char_pad;
    118         uint16_t reserved_pad;
    119         uint64_t kbytes_written; // Number of lifetime kilobytes written
    120         uint32_t snapshot_inum; // Inode number of active snapshot
    121         uint32_t snapshot_id; // Sequential ID of active snapshot
    122         uint64_t snapshot_r_blocks_count; /* reserved blocks for active snapshot's future use */
    123         uint32_t snapshot_list; // inode number of the head of the on-disk snapshot list
    124         uint32_t error_count; // number of fs errors
    125         uint32_t first_error_time; // First time an error happened
    126         uint32_t first_error_ino; // Inode involved in first error
    127         uint64_t first_error_block; // block involved of first error
    128         uint8_t first_error_func[32]; // Function where the error happened
    129         uint32_t first_error_line; // Line number where error happened
    130         uint32_t last_error_time; // Most recent time of an error
    131         uint32_t last_error_ino; // Inode involved in last error
    132         uint32_t last_error_line; // Line number where error happened
    133         uint64_t last_error_block;     // Block involved of last error
    134         uint8_t last_error_func[32];  // Function where the error happened
    135         uint8_t mount_opts[64];
    136         uint32_t padding[112]; // Padding to the end of the block
    137 } __attribute__((packed)) ext4_superblock_t;
    138 
    139 #define EXT4_SUPERBLOCK_MAGIC           0xEF53
    140 #define EXT4_SUPERBLOCK_SIZE            1024
    141 #define EXT4_SUPERBLOCK_OFFSET          1024
    142 
    143 #define EXT4_SUPERBLOCK_OS_LINUX        0
    144 #define EXT4_SUPERBLOCK_OS_HURD         1
    145 
    146 /*
    147  * Misc. filesystem flags
    148  */
    149 #define EXT4_SUPERBLOCK_FLAGS_SIGNED_HASH       0x0001  /* Signed dirhash in use */
    150 #define EXT4_SUPERBLOCK_FLAGS_UNSIGNED_HASH     0x0002  /* Unsigned dirhash in use */
    151 #define EXT4_SUPERBLOCK_FLAGS_TEST_FILESYS      0x0004  /* to test development code */
    152 
    153 /* Compatible features */
    154 #define EXT4_FEATURE_COMPAT_DIR_PREALLOC        0x0001
    155 #define EXT4_FEATURE_COMPAT_IMAGIC_INODES       0x0002
    156 #define EXT4_FEATURE_COMPAT_HAS_JOURNAL         0x0004
    157 #define EXT4_FEATURE_COMPAT_EXT_ATTR            0x0008
    158 #define EXT4_FEATURE_COMPAT_RESIZE_INODE        0x0010
    159 #define EXT4_FEATURE_COMPAT_DIR_INDEX           0x0020
    160 
    161 /* Read-only compatible features */
    162 #define EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER     0x0001
    163 #define EXT4_FEATURE_RO_COMPAT_LARGE_FILE       0x0002
    164 #define EXT4_FEATURE_RO_COMPAT_BTREE_DIR        0x0004
    165 #define EXT4_FEATURE_RO_COMPAT_HUGE_FILE        0x0008
    166 #define EXT4_FEATURE_RO_COMPAT_GDT_CSUM         0x0010
    167 #define EXT4_FEATURE_RO_COMPAT_DIR_NLINK        0x0020
    168 #define EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE      0x0040
    169 
    170 /* Incompatible features */
    171 #define EXT4_FEATURE_INCOMPAT_COMPRESSION       0x0001
    172 #define EXT4_FEATURE_INCOMPAT_FILETYPE          0x0002
    173 #define EXT4_FEATURE_INCOMPAT_RECOVER           0x0004 /* Needs recovery */
    174 #define EXT4_FEATURE_INCOMPAT_JOURNAL_DEV       0x0008 /* Journal device */
    175 #define EXT4_FEATURE_INCOMPAT_META_BG           0x0010
    176 #define EXT4_FEATURE_INCOMPAT_EXTENTS           0x0040 /* extents support */
    177 #define EXT4_FEATURE_INCOMPAT_64BIT             0x0080
    178 #define EXT4_FEATURE_INCOMPAT_MMP               0x0100
    179 #define EXT4_FEATURE_INCOMPAT_FLEX_BG           0x0200
    180 #define EXT4_FEATURE_INCOMPAT_EA_INODE          0x0400 /* EA in inode */
    181 #define EXT4_FEATURE_INCOMPAT_DIRDATA           0x1000 /* data in dirent */
    182 
    183 // TODO MODIFY features corresponding with implementation
    184 #define EXT4_FEATURE_COMPAT_SUPP                (EXT4_FEATURE_COMPAT_DIR_INDEX)
    185 
    186 #define EXT4_FEATURE_INCOMPAT_SUPP      (EXT4_FEATURE_INCOMPAT_FILETYPE| \
    187                                          EXT4_FEATURE_INCOMPAT_EXTENTS| \
    188                                          EXT4_FEATURE_INCOMPAT_64BIT)
    189 
    190 #define EXT4_FEATURE_RO_COMPAT_SUPP     (EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER | \
    191                                                                                  EXT4_FEATURE_RO_COMPAT_DIR_NLINK)
    192 
    193 
     39#include "libext4_types.h"
    19440
    19541extern uint32_t ext4_superblock_get_inodes_count(ext4_superblock_t *);
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