1 /* 2 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 3 * Use is subject to license terms. 4 */ 5 6 #ifndef _GRUB_UFS_H 7 #define _GRUB_UFS_H 8 9 /* ufs specific constants */ 10 #define UFS_SBLOCK 16 11 #define UFS_SBSIZE 8192 12 #define UFS_MAGIC 0x011954 13 #define ROOTINO 2 /* i number of all roots */ 14 #define UFS_NDADDR 12 /* direct blocks */ 15 #define UFS_NIADDR 3 /* indirect blocks */ 16 #define MAXMNTLEN 512 17 #define MAXCSBUFS 32 18 #define MAXNAMELEN 256 19 20 /* file types */ 21 #define IFMT 0xf000 22 #define IFREG 0x8000 23 #define IFDIR 0x4000 24 25 typedef unsigned char grub_uchar_t; 26 typedef unsigned short grub_ushort_t; 27 typedef unsigned short grub_o_mode_t; 28 typedef unsigned short grub_o_uid_t; 29 typedef unsigned short grub_o_gid_t; 30 typedef uint32_t grub_ino_t; 31 typedef int32_t grub_int32_t; 32 typedef int32_t grub_uid_t; 33 typedef int32_t grub_gid_t; 34 typedef uint32_t grub_uint32_t; 35 typedef uint32_t grub_daddr32_t; 36 typedef uint32_t grub_time32_t; 37 typedef struct { int val[2]; } grub_quad_t; 38 39 struct timeval32 { 40 grub_time32_t tv_sec; 41 grub_int32_t tv_usec; 42 }; 43 44 /* 45 * Per cylinder group information; summarized in blocks allocated 46 * from first cylinder group data blocks. These blocks have to be 47 * read in from fs_csaddr (size fs_cssize) in addition to the 48 * super block. 49 * 50 * N.B. sizeof (struct csum) must be a power of two in order for 51 * the ``fs_cs'' macro to work (see below). 52 */ 53 struct csum { 54 grub_int32_t cs_ndir; /* number of directories */ 55 grub_int32_t cs_nbfree; /* number of free blocks */ 56 grub_int32_t cs_nifree; /* number of free inodes */ 57 grub_int32_t cs_nffree; /* number of free frags */ 58 }; 59 60 /* Ufs super block */ 61 struct fs { 62 grub_uint32_t fs_link; /* linked list of file systems */ 63 grub_uint32_t fs_rolled; /* logging only: fs fully rolled */ 64 grub_daddr32_t fs_sblkno; /* addr of super-block in filesys */ 65 grub_daddr32_t fs_cblkno; /* offset of cyl-block in filesys */ 66 grub_daddr32_t fs_iblkno; /* offset of inode-blocks in filesys */ 67 grub_daddr32_t fs_dblkno; /* offset of first data after cg */ 68 grub_int32_t fs_cgoffset; /* cylinder group offset in cylinder */ 69 grub_int32_t fs_cgmask; /* used to calc mod fs_ntrak */ 70 grub_time32_t fs_time; /* last time written */ 71 grub_int32_t fs_size; /* number of blocks in fs */ 72 grub_int32_t fs_dsize; /* number of data blocks in fs */ 73 grub_int32_t fs_ncg; /* number of cylinder groups */ 74 grub_int32_t fs_bsize; /* size of basic blocks in fs */ 75 grub_int32_t fs_fsize; /* size of frag blocks in fs */ 76 grub_int32_t fs_frag; /* number of frags in a block in fs */ 77 /* these are configuration parameters */ 78 grub_int32_t fs_minfree; /* minimum percentage of free blocks */ 79 grub_int32_t fs_rotdelay; /* num of ms for optimal next block */ 80 grub_int32_t fs_rps; /* disk revolutions per second */ 81 /* these fields can be computed from the others */ 82 grub_int32_t fs_bmask; /* ``blkoff'' calc of blk offsets */ 83 grub_int32_t fs_fmask; /* ``fragoff'' calc of frag offsets */ 84 grub_int32_t fs_bshift; /* ``lblkno'' calc of logical blkno */ 85 grub_int32_t fs_fshift; /* ``numfrags'' calc number of frags */ 86 /* these are configuration parameters */ 87 grub_int32_t fs_maxcontig; /* max number of contiguous blks */ 88 grub_int32_t fs_maxbpg; /* max number of blks per cyl group */ 89 /* these fields can be computed from the others */ 90 grub_int32_t fs_fragshift; /* block to frag shift */ 91 grub_int32_t fs_fsbtodb; /* fsbtodb and dbtofsb shift constant */ 92 grub_int32_t fs_sbsize; /* actual size of super block */ 93 grub_int32_t fs_csmask; /* csum block offset */ 94 grub_int32_t fs_csshift; /* csum block number */ 95 grub_int32_t fs_nindir; /* value of NINDIR */ 96 grub_int32_t fs_inopb; /* value of INOPB */ 97 grub_int32_t fs_nspf; /* value of NSPF */ 98 /* yet another configuration parameter */ 99 grub_int32_t fs_optim; /* optimization preference, see below */ 100 /* these fields are derived from the hardware */ 101 /* USL SVR4 compatibility */ 102 /* 103 * * USL SVR4 compatibility 104 * 105 * There was a significant divergence here between Solaris and 106 * SVR4 for x86. By swapping these two members in the superblock, 107 * we get read-only compatibility of SVR4 filesystems. Otherwise 108 * there would be no compatibility. This change was introduced 109 * during bootstrapping of Solaris on x86. By making this ifdef'ed 110 * on byte order, we provide ongoing compatibility across all 111 * platforms with the same byte order, the highest compatibility 112 * that can be achieved. 113 */ 114 grub_int32_t fs_state; /* file system state time stamp */ 115 grub_int32_t fs_si; /* summary info state - lufs only */ 116 grub_int32_t fs_trackskew; /* sector 0 skew, per track */ 117 /* unique id for this filesystem (currently unused and unmaintained) */ 118 /* In 4.3 Tahoe this space is used by fs_headswitch and fs_trkseek */ 119 /* Neither of those fields is used in the Tahoe code right now but */ 120 /* there could be problems if they are. */ 121 grub_int32_t fs_id[2]; /* file system id */ 122 /* sizes determined by number of cylinder groups and their sizes */ 123 grub_daddr32_t fs_csaddr; /* blk addr of cyl grp summary area */ 124 grub_int32_t fs_cssize; /* size of cyl grp summary area */ 125 grub_int32_t fs_cgsize; /* cylinder group size */ 126 /* these fields are derived from the hardware */ 127 grub_int32_t fs_ntrak; /* tracks per cylinder */ 128 grub_int32_t fs_nsect; /* sectors per track */ 129 grub_int32_t fs_spc; /* sectors per cylinder */ 130 /* this comes from the disk driver partitioning */ 131 grub_int32_t fs_ncyl; /* cylinders in file system */ 132 /* these fields can be computed from the others */ 133 grub_int32_t fs_cpg; /* cylinders per group */ 134 grub_int32_t fs_ipg; /* inodes per group */ 135 grub_int32_t fs_fpg; /* blocks per group * fs_frag */ 136 /* this data must be re-computed after crashes */ 137 struct csum fs_cstotal; /* cylinder summary information */ 138 /* these fields are cleared at mount time */ 139 char fs_fmod; /* super block modified flag */ 140 char fs_clean; /* file system state flag */ 141 char fs_ronly; /* mounted read-only flag */ 142 char fs_flags; /* largefiles flag, etc. */ 143 char fs_fsmnt[MAXMNTLEN]; /* name mounted on */ 144 /* these fields retain the current block allocation info */ 145 grub_int32_t fs_cgrotor; /* last cg searched */ 146 /* 147 * The following used to be fs_csp[MAXCSBUFS]. It was not 148 * used anywhere except in old utilities. We removed this 149 * in 5.6 and expect fs_u.fs_csp to be used instead. 150 * We no longer limit fs_cssize based on MAXCSBUFS. 151 */ 152 union { /* fs_cs (csum) info */ 153 grub_uint32_t fs_csp_pad[MAXCSBUFS]; 154 struct csum *fs_csp; 155 } fs_u; 156 grub_int32_t fs_cpc; /* cyl per cycle in postbl */ 157 short fs_opostbl[16][8]; /* old rotation block list head */ 158 grub_int32_t fs_sparecon[51]; /* reserved for future constants */ 159 grub_int32_t fs_version; /* minor version of MTB ufs */ 160 grub_int32_t fs_logbno; /* block # of embedded log */ 161 grub_int32_t fs_reclaim; /* reclaim open, deleted files */ 162 grub_int32_t fs_sparecon2; /* reserved for future constant */ 163 /* USL SVR4 compatibility */ 164 grub_int32_t fs_npsect; /* # sectors/track including spares */ 165 grub_quad_t fs_qbmask; /* ~fs_bmask - for use with quad size */ 166 grub_quad_t fs_qfmask; /* ~fs_fmask - for use with quad size */ 167 grub_int32_t fs_postblformat; /* fmt of positional layout tables */ 168 grub_int32_t fs_nrpos; /* number of rotaional positions */ 169 grub_int32_t fs_postbloff; /* (short) rotation block list head */ 170 grub_int32_t fs_rotbloff; /* (grub_uchar_t) blocks for each */ 171 /* rotation */ 172 grub_int32_t fs_magic; /* magic number */ 173 grub_uchar_t fs_space[1]; /* list of blocks for each rotation */ 174 /* actually longer */ 175 }; 176 177 struct icommon { 178 grub_o_mode_t ic_smode; /* 0: mode and type of file */ 179 short ic_nlink; /* 2: number of links to file */ 180 grub_o_uid_t ic_suid; /* 4: owner's user id */ 181 grub_o_gid_t ic_sgid; /* 6: owner's group id */ 182 grub_uint32_t ic_sizelo; /* 8: number of bytes in file */ 183 grub_uint32_t ic_sizehi; /* 12: number of bytes in file */ 184 struct timeval32 ic_atime; /* 16: time last accessed */ 185 struct timeval32 ic_mtime; /* 24: time last modified */ 186 struct timeval32 ic_ctime; /* 32: last time inode changed */ 187 grub_daddr32_t ic_db[UFS_NDADDR]; /* 40: disk block addresses */ 188 grub_daddr32_t ic_ib[UFS_NIADDR]; /* 88: indirect blocks */ 189 grub_int32_t ic_flags; /* 100: cflags */ 190 grub_int32_t ic_blocks; /* 104: 512 byte blocks actually held */ 191 grub_int32_t ic_gen; /* 108: generation number */ 192 grub_int32_t ic_shadow; /* 112: shadow inode */ 193 grub_uid_t ic_uid; /* 116: long EFT version of uid */ 194 grub_gid_t ic_gid; /* 120: long EFT version of gid */ 195 grub_uint32_t ic_oeftflag; /* 124: extended attr directory ino, */ 196 /* 0 = none */ 197 }; 198 199 struct direct { 200 grub_ino_t d_ino; 201 grub_ushort_t d_reclen; 202 grub_ushort_t d_namelen; 203 char d_name[MAXNAMELEN + 1]; 204 }; 205 206 /* inode macros */ 207 #define INOPB(fs) ((fs)->fs_inopb) 208 #define itoo(fs, x) ((x) % (grub_uint32_t)INOPB(fs)) 209 #define itog(fs, x) ((x) / (grub_uint32_t)(fs)->fs_ipg) 210 #define itod(fs, x) ((grub_daddr32_t)(cgimin(fs, itog(fs, x)) + \ 211 (blkstofrags((fs), \ 212 ((x) % (grub_uint32_t)(fs)->fs_ipg / (grub_uint32_t)INOPB(fs)))))) 213 214 /* block conversion macros */ 215 #define UFS_NINDIR(fs) ((fs)->fs_nindir) /* # of indirects */ 216 #define blkoff(fs, loc) ((int)((loc & ~(fs)->fs_bmask))) 217 #define lblkno(fs, loc) ((grub_int32_t)((loc) >> (fs)->fs_bshift)) 218 /* frag to blk */ 219 #define fsbtodb(fs, b) (((grub_daddr32_t)(b)) << (fs)->fs_fsbtodb) 220 #define blkstofrags(fs, b) ((b) << (fs)->fs_fragshift) 221 222 /* cynlinder group macros */ 223 #define cgbase(fs, c) ((grub_daddr32_t)((fs)->fs_fpg * (c))) 224 #define cgimin(fs, c) (cgstart(fs, c) + (fs)->fs_iblkno) /* inode block */ 225 #define cgstart(fs, c) \ 226 (cgbase(fs, c) + (fs)->fs_cgoffset * ((c) & ~((fs)->fs_cgmask))) 227 228 #endif /* !_GRUB_UFS_H */ 229