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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 422 | giacomo | 1 | /* |
| 2 | * efs_vh.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) 1985 MIPS Computer Systems, Inc. |
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| 7 | */ |
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| 8 | |||
| 9 | #ifndef __EFS_VH_H__ |
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| 10 | #define __EFS_VH_H__ |
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| 11 | |||
| 12 | #define VHMAGIC 0xbe5a941 /* volume header magic number */ |
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| 13 | #define NPARTAB 16 /* 16 unix partitions */ |
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| 14 | #define NVDIR 15 /* max of 15 directory entries */ |
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| 15 | #define BFNAMESIZE 16 /* max 16 chars in boot file name */ |
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| 16 | #define VDNAMESIZE 8 |
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| 17 | |||
| 18 | struct volume_directory { |
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| 19 | char vd_name[VDNAMESIZE]; /* name */ |
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| 20 | int vd_lbn; /* logical block number */ |
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| 21 | int vd_nbytes; /* file length in bytes */ |
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| 22 | }; |
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| 23 | |||
| 24 | struct partition_table { /* one per logical partition */ |
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| 25 | int pt_nblks; /* # of logical blks in partition */ |
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| 26 | int pt_firstlbn; /* first lbn of partition */ |
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| 27 | int pt_type; /* use of partition */ |
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| 28 | }; |
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| 29 | |||
| 30 | struct volume_header { |
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| 31 | int vh_magic; /* identifies volume header */ |
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| 32 | short vh_rootpt; /* root partition number */ |
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| 33 | short vh_swappt; /* swap partition number */ |
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| 34 | char vh_bootfile[BFNAMESIZE]; /* name of file to boot */ |
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| 35 | char pad[48]; /* device param space */ |
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| 36 | struct volume_directory vh_vd[NVDIR]; /* other vol hdr contents */ |
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| 37 | struct partition_table vh_pt[NPARTAB]; /* device partition layout */ |
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| 38 | int vh_csum; /* volume header checksum */ |
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| 39 | int vh_fill; /* fill out to 512 bytes */ |
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| 40 | }; |
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| 41 | |||
| 42 | /* partition type sysv is used for EFS format CD-ROM partitions */ |
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| 43 | #define SGI_SYSV 0x05 |
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| 44 | #define SGI_EFS 0x07 |
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| 45 | #define IS_EFS(x) (((x) == SGI_EFS) || ((x) == SGI_SYSV)) |
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| 46 | |||
| 47 | struct pt_types { |
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| 48 | int pt_type; |
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| 49 | char *pt_name; |
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| 50 | } sgi_pt_types[] = { |
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| 51 | {0x00, "SGI vh"}, |
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| 52 | {0x01, "SGI trkrepl"}, |
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| 53 | {0x02, "SGI secrepl"}, |
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| 54 | {0x03, "SGI raw"}, |
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| 55 | {0x04, "SGI bsd"}, |
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| 56 | {SGI_SYSV, "SGI sysv"}, |
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| 57 | {0x06, "SGI vol"}, |
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| 58 | {SGI_EFS, "SGI efs"}, |
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| 59 | {0x08, "SGI lv"}, |
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| 60 | {0x09, "SGI rlv"}, |
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| 61 | {0x0A, "SGI xfs"}, |
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| 62 | {0x0B, "SGI xfslog"}, |
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| 63 | {0x0C, "SGI xlv"}, |
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| 64 | {0x82, "Linux swap"}, |
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| 65 | {0x83, "Linux native"}, |
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| 66 | {0, NULL} |
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| 67 | }; |
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| 68 | |||
| 69 | #endif /* __EFS_VH_H__ */ |
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| 70 |