1 /* 2 * efs_vh.h 3 * 4 * Copyright (c) 1999 Al Smith 5 * 6 * Portions derived from IRIX header files (c) 1985 MIPS Computer Systems, Inc. 7 */ 8 9 #ifndef __EFS_VH_H__ 10 #define __EFS_VH_H__ 11 12 #define VHMAGIC 0xbe5a941 /* volume header magic number */ 13 #define NPARTAB 16 /* 16 unix partitions */ 14 #define NVDIR 15 /* max of 15 directory entries */ 15 #define BFNAMESIZE 16 /* max 16 chars in boot file name */ 16 #define VDNAMESIZE 8 17 18 struct volume_directory { 19 char vd_name[VDNAMESIZE]; /* name */ 20 int vd_lbn; /* logical block number */ 21 int vd_nbytes; /* file length in bytes */ 22 }; 23 24 struct partition_table { /* one per logical partition */ 25 int pt_nblks; /* # of logical blks in partition */ 26 int pt_firstlbn; /* first lbn of partition */ 27 int pt_type; /* use of partition */ 28 }; 29 30 struct volume_header { 31 int vh_magic; /* identifies volume header */ 32 short vh_rootpt; /* root partition number */ 33 short vh_swappt; /* swap partition number */ 34 char vh_bootfile[BFNAMESIZE]; /* name of file to boot */ 35 char pad[48]; /* device param space */ 36 struct volume_directory vh_vd[NVDIR]; /* other vol hdr contents */ 37 struct partition_table vh_pt[NPARTAB]; /* device partition layout */ 38 int vh_csum; /* volume header checksum */ 39 int vh_fill; /* fill out to 512 bytes */ 40 }; 41 42 /* partition type sysv is used for EFS format CD-ROM partitions */ 43 #define SGI_SYSV 0x05 44 #define SGI_EFS 0x07 45 #define IS_EFS(x) (((x) == SGI_EFS) || ((x) == SGI_SYSV)) 46 47 struct pt_types { 48 int pt_type; 49 char *pt_name; 50 } sgi_pt_types[] = { 51 {0x00, "SGI vh"}, 52 {0x01, "SGI trkrepl"}, 53 {0x02, "SGI secrepl"}, 54 {0x03, "SGI raw"}, 55 {0x04, "SGI bsd"}, 56 {SGI_SYSV, "SGI sysv"}, 57 {0x06, "SGI vol"}, 58 {SGI_EFS, "SGI efs"}, 59 {0x08, "SGI lv"}, 60 {0x09, "SGI rlv"}, 61 {0x0A, "SGI xfs"}, 62 {0x0B, "SGI xfslog"}, 63 {0x0C, "SGI xlv"}, 64 {0x82, "Linux swap"}, 65 {0x83, "Linux native"}, 66 {0, NULL} 67 }; 68 69 #endif /* __EFS_VH_H__ */ 70 71