| 1 | /* |
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| 2 | * efs_fs_sb.h |
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| 3 | * |
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| 4 | * Copyright (c) 1999 Al Smith |
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| 5 | * |
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| 6 | * Portions derived from IRIX header files (c) 1988 Silicon Graphics |
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| 7 | */ |
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| 8 | |
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| 9 | #ifndef __EFS_FS_SB_H__ |
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| 10 | #define __EFS_FS_SB_H__ |
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| 11 | |
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| 12 | #include <asm/types.h> |
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| 13 | |
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| 14 | /* statfs() magic number for EFS */ |
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| 15 | #define EFS_SUPER_MAGIC 0x414A53 |
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| 16 | |
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| 17 | /* EFS superblock magic numbers */ |
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| 18 | #define EFS_MAGIC 0x072959 |
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| 19 | #define EFS_NEWMAGIC 0x07295a |
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| 20 | |
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| 21 | #define IS_EFS_MAGIC(x) ((x == EFS_MAGIC) || (x == EFS_NEWMAGIC)) |
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| 22 | |
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| 23 | #define EFS_SUPER 1 |
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| 24 | #define EFS_ROOTINODE 2 |
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| 25 | |
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| 26 | /* efs superblock on disk */ |
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| 27 | struct efs_super { |
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| 28 | __be32 fs_size; /* size of filesystem, in sectors */ |
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| 29 | __be32 fs_firstcg; /* bb offset to first cg */ |
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| 30 | __be32 fs_cgfsize; /* size of cylinder group in bb's */ |
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| 31 | __be16 fs_cgisize; /* bb's of inodes per cylinder group */ |
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| 32 | __be16 fs_sectors; /* sectors per track */ |
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| 33 | __be16 fs_heads; /* heads per cylinder */ |
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| 34 | __be16 fs_ncg; /* # of cylinder groups in filesystem */ |
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| 35 | __be16 fs_dirty; /* fs needs to be fsck'd */ |
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| 36 | __be32 fs_time; /* last super-block update */ |
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| 37 | __be32 fs_magic; /* magic number */ |
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| 38 | char fs_fname[6]; /* file system name */ |
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| 39 | char fs_fpack[6]; /* file system pack name */ |
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| 40 | __be32 fs_bmsize; /* size of bitmap in bytes */ |
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| 41 | __be32 fs_tfree; /* total free data blocks */ |
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| 42 | __be32 fs_tinode; /* total free inodes */ |
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| 43 | __be32 fs_bmblock; /* bitmap location. */ |
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| 44 | __be32 fs_replsb; /* Location of replicated superblock. */ |
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| 45 | __be32 fs_lastialloc; /* last allocated inode */ |
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| 46 | char fs_spare[20]; /* space for expansion - MUST BE ZERO */ |
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| 47 | __be32 fs_checksum; /* checksum of volume portion of fs */ |
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| 48 | }; |
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| 49 | |
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| 50 | /* efs superblock information in memory */ |
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| 51 | struct efs_sb_info { |
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| 52 | __u32 fs_magic; /* superblock magic number */ |
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| 53 | __u32 fs_start; /* first block of filesystem */ |
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| 54 | __u32 first_block; /* first data block in filesystem */ |
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| 55 | __u32 total_blocks; /* total number of blocks in filesystem */ |
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| 56 | __u32 group_size; /* # of blocks a group consists of */ |
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| 57 | __u32 data_free; /* # of free data blocks */ |
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| 58 | __u32 inode_free; /* # of free inodes */ |
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| 59 | __u16 inode_blocks; /* # of blocks used for inodes in every grp */ |
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| 60 | __u16 total_groups; /* # of groups */ |
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| 61 | }; |
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| 62 | |
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| 63 | #endif /* __EFS_FS_SB_H__ */ |
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| 64 | |
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