efs_vh.h
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上传日期:2013-04-10
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- /*
- * efs_vh.h
- *
- * Copyright (c) 1999 Al Smith
- *
- * Portions derived from IRIX header files (c) 1985 MIPS Computer Systems, Inc.
- */
- #ifndef __EFS_VH_H__
- #define __EFS_VH_H__
- #define VHMAGIC 0xbe5a941 /* volume header magic number */
- #define NPARTAB 16 /* 16 unix partitions */
- #define NVDIR 15 /* max of 15 directory entries */
- #define BFNAMESIZE 16 /* max 16 chars in boot file name */
- #define VDNAMESIZE 8
- struct volume_directory {
- char vd_name[VDNAMESIZE]; /* name */
- int vd_lbn; /* logical block number */
- int vd_nbytes; /* file length in bytes */
- };
- struct partition_table { /* one per logical partition */
- int pt_nblks; /* # of logical blks in partition */
- int pt_firstlbn; /* first lbn of partition */
- int pt_type; /* use of partition */
- };
- struct volume_header {
- int vh_magic; /* identifies volume header */
- short vh_rootpt; /* root partition number */
- short vh_swappt; /* swap partition number */
- char vh_bootfile[BFNAMESIZE]; /* name of file to boot */
- char pad[48]; /* device param space */
- struct volume_directory vh_vd[NVDIR]; /* other vol hdr contents */
- struct partition_table vh_pt[NPARTAB]; /* device partition layout */
- int vh_csum; /* volume header checksum */
- int vh_fill; /* fill out to 512 bytes */
- };
- /* partition type sysv is used for EFS format CD-ROM partitions */
- #define SGI_SYSV 0x05
- #define SGI_EFS 0x07
- #define IS_EFS(x) (((x) == SGI_EFS) || ((x) == SGI_SYSV))
- struct pt_types {
- int pt_type;
- char *pt_name;
- } sgi_pt_types[] = {
- {0x00, "SGI vh"},
- {0x01, "SGI trkrepl"},
- {0x02, "SGI secrepl"},
- {0x03, "SGI raw"},
- {0x04, "SGI bsd"},
- {SGI_SYSV, "SGI sysv"},
- {0x06, "SGI vol"},
- {SGI_EFS, "SGI efs"},
- {0x08, "SGI lv"},
- {0x09, "SGI rlv"},
- {0x0A, "SGI xfs"},
- {0x0B, "SGI xfslog"},
- {0x0C, "SGI xlv"},
- {0x82, "Linux swap"},
- {0x83, "Linux native"},
- {0, NULL}
- };
- #endif /* __EFS_VH_H__ */