1 /* 2 * linux/include/linux/ufs_fs.h 3 * 4 * Copyright (C) 1996 5 * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu) 6 * Laboratory for Computer Science Research Computing Facility 7 * Rutgers, The State University of New Jersey 8 * 9 * Clean swab support by Fare <fare@tunes.org> 10 * just hope no one is using NNUUXXI on __?64 structure elements 11 * 64-bit clean thanks to Maciej W. Rozycki <macro@ds2.pg.gda.pl> 12 * 13 * 4.4BSD (FreeBSD) support added on February 1st 1998 by 14 * Niels Kristian Bech Jensen <nkbj@image.dk> partially based 15 * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>. 16 * 17 * NeXTstep support added on February 5th 1998 by 18 * Niels Kristian Bech Jensen <nkbj@image.dk>. 19 * 20 * Write support by Daniel Pirkl <daniel.pirkl@email.cz> 21 * 22 * HP/UX hfs filesystem support added by 23 * Martin K. Petersen <mkp@mkp.net>, August 1999 24 * 25 * UFS2 (of FreeBSD 5.x) support added by 26 * Niraj Kumar <niraj17@iitbombay.org> , Jan 2004 27 * 28 */ 29 30 #ifndef __LINUX_UFS_FS_H 31 #define __LINUX_UFS_FS_H 32 33 #include <linux/types.h> 34 #include <linux/kernel.h> 35 #include <linux/stat.h> 36 #include <linux/fs.h> 37 38 #include <asm/div64.h> 39 typedef __u64 __bitwise __fs64; 40 typedef __u32 __bitwise __fs32; 41 typedef __u16 __bitwise __fs16; 42 43 #define UFS_BBLOCK 0 44 #define UFS_BBSIZE 8192 45 #define UFS_SBLOCK 8192 46 #define UFS_SBSIZE 8192 47 48 #define UFS_SECTOR_SIZE 512 49 #define UFS_SECTOR_BITS 9 50 #define UFS_MAGIC 0x00011954 51 #define UFS_MAGIC_BW 0x0f242697 52 #define UFS2_MAGIC 0x19540119 53 #define UFS_CIGAM 0x54190100 /* byteswapped MAGIC */ 54 55 /* Copied from FreeBSD */ 56 /* 57 * Each disk drive contains some number of filesystems. 58 * A filesystem consists of a number of cylinder groups. 59 * Each cylinder group has inodes and data. 60 * 61 * A filesystem is described by its super-block, which in turn 62 * describes the cylinder groups. The super-block is critical 63 * data and is replicated in each cylinder group to protect against 64 * catastrophic loss. This is done at `newfs' time and the critical 65 * super-block data does not change, so the copies need not be 66 * referenced further unless disaster strikes. 67 * 68 * For filesystem fs, the offsets of the various blocks of interest 69 * are given in the super block as: 70 * [fs->fs_sblkno] Super-block 71 * [fs->fs_cblkno] Cylinder group block 72 * [fs->fs_iblkno] Inode blocks 73 * [fs->fs_dblkno] Data blocks 74 * The beginning of cylinder group cg in fs, is given by 75 * the ``cgbase(fs, cg)'' macro. 76 * 77 * Depending on the architecture and the media, the superblock may 78 * reside in any one of four places. For tiny media where every block 79 * counts, it is placed at the very front of the partition. Historically, 80 * UFS1 placed it 8K from the front to leave room for the disk label and 81 * a small bootstrap. For UFS2 it got moved to 64K from the front to leave 82 * room for the disk label and a bigger bootstrap, and for really piggy 83 * systems we check at 256K from the front if the first three fail. In 84 * all cases the size of the superblock will be SBLOCKSIZE. All values are 85 * given in byte-offset form, so they do not imply a sector size. The 86 * SBLOCKSEARCH specifies the order in which the locations should be searched. 87 */ 88 #define SBLOCK_FLOPPY 0 89 #define SBLOCK_UFS1 8192 90 #define SBLOCK_UFS2 65536 91 #define SBLOCK_PIGGY 262144 92 #define SBLOCKSIZE 8192 93 #define SBLOCKSEARCH \ 94 { SBLOCK_UFS2, SBLOCK_UFS1, SBLOCK_FLOPPY, SBLOCK_PIGGY, -1 } 95 96 97 /* HP specific MAGIC values */ 98 99 #define UFS_MAGIC_LFN 0x00095014 /* fs supports filenames > 14 chars */ 100 #define UFS_CIGAM_LFN 0x14500900 /* srahc 41 < semanelif stroppus sf */ 101 102 #define UFS_MAGIC_SEC 0x00612195 /* B1 security fs */ 103 #define UFS_CIGAM_SEC 0x95216100 104 105 #define UFS_MAGIC_FEA 0x00195612 /* fs_featurebits supported */ 106 #define UFS_CIGAM_FEA 0x12561900 107 108 #define UFS_MAGIC_4GB 0x05231994 /* fs > 4 GB && fs_featurebits */ 109 #define UFS_CIGAM_4GB 0x94192305 110 111 /* Seems somebody at HP goofed here. B1 and lfs are both 0x2 !?! */ 112 #define UFS_FSF_LFN 0x00000001 /* long file names */ 113 #define UFS_FSF_B1 0x00000002 /* B1 security */ 114 #define UFS_FSF_LFS 0x00000002 /* large files */ 115 #define UFS_FSF_LUID 0x00000004 /* large UIDs */ 116 117 /* End of HP stuff */ 118 119 120 #define UFS_BSIZE 8192 121 #define UFS_MINBSIZE 4096 122 #define UFS_FSIZE 1024 123 #define UFS_MAXFRAG (UFS_BSIZE / UFS_FSIZE) 124 125 #define UFS_NDADDR 12 126 #define UFS_NINDIR 3 127 128 #define UFS_IND_BLOCK (UFS_NDADDR + 0) 129 #define UFS_DIND_BLOCK (UFS_NDADDR + 1) 130 #define UFS_TIND_BLOCK (UFS_NDADDR + 2) 131 132 #define UFS_NDIR_FRAGMENT (UFS_NDADDR << uspi->s_fpbshift) 133 #define UFS_IND_FRAGMENT (UFS_IND_BLOCK << uspi->s_fpbshift) 134 #define UFS_DIND_FRAGMENT (UFS_DIND_BLOCK << uspi->s_fpbshift) 135 #define UFS_TIND_FRAGMENT (UFS_TIND_BLOCK << uspi->s_fpbshift) 136 137 #define UFS_ROOTINO 2 138 #define UFS_FIRST_INO (UFS_ROOTINO + 1) 139 140 #define UFS_USEEFT ((__u16)65535) 141 142 /* fs_clean values */ 143 #define UFS_FSOK 0x7c269d38 144 #define UFS_FSACTIVE ((__s8)0x00) 145 #define UFS_FSCLEAN ((__s8)0x01) 146 #define UFS_FSSTABLE ((__s8)0x02) 147 #define UFS_FSOSF1 ((__s8)0x03) /* is this correct for DEC OSF/1? */ 148 #define UFS_FSBAD ((__s8)0xff) 149 150 /* Solaris-specific fs_clean values */ 151 #define UFS_FSSUSPEND ((__s8)0xfe) /* temporarily suspended */ 152 #define UFS_FSLOG ((__s8)0xfd) /* logging fs */ 153 #define UFS_FSFIX ((__s8)0xfc) /* being repaired while mounted */ 154 155 /* From here to next blank line, s_flags for ufs_sb_info */ 156 /* directory entry encoding */ 157 #define UFS_DE_MASK 0x00000010 /* mask for the following */ 158 #define UFS_DE_OLD 0x00000000 159 #define UFS_DE_44BSD 0x00000010 160 /* uid encoding */ 161 #define UFS_UID_MASK 0x00000060 /* mask for the following */ 162 #define UFS_UID_OLD 0x00000000 163 #define UFS_UID_44BSD 0x00000020 164 #define UFS_UID_EFT 0x00000040 165 /* superblock state encoding */ 166 #define UFS_ST_MASK 0x00000700 /* mask for the following */ 167 #define UFS_ST_OLD 0x00000000 168 #define UFS_ST_44BSD 0x00000100 169 #define UFS_ST_SUN 0x00000200 /* Solaris */ 170 #define UFS_ST_SUNOS 0x00000300 171 #define UFS_ST_SUNx86 0x00000400 /* Solaris x86 */ 172 /*cylinder group encoding */ 173 #define UFS_CG_MASK 0x00003000 /* mask for the following */ 174 #define UFS_CG_OLD 0x00000000 175 #define UFS_CG_44BSD 0x00002000 176 #define UFS_CG_SUN 0x00001000 177 /* filesystem type encoding */ 178 #define UFS_TYPE_MASK 0x00010000 /* mask for the following */ 179 #define UFS_TYPE_UFS1 0x00000000 180 #define UFS_TYPE_UFS2 0x00010000 181 182 183 /* fs_inodefmt options */ 184 #define UFS_42INODEFMT -1 185 #define UFS_44INODEFMT 2 186 187 /* 188 * MINFREE gives the minimum acceptable percentage of file system 189 * blocks which may be free. If the freelist drops below this level 190 * only the superuser may continue to allocate blocks. This may 191 * be set to 0 if no reserve of free blocks is deemed necessary, 192 * however throughput drops by fifty percent if the file system 193 * is run at between 95% and 100% full; thus the minimum default 194 * value of fs_minfree is 5%. However, to get good clustering 195 * performance, 10% is a better choice. hence we use 10% as our 196 * default value. With 10% free space, fragmentation is not a 197 * problem, so we choose to optimize for time. 198 */ 199 #define UFS_MINFREE 5 200 #define UFS_DEFAULTOPT UFS_OPTTIME 201 202 /* 203 * Turn file system block numbers into disk block addresses. 204 * This maps file system blocks to device size blocks. 205 */ 206 #define ufs_fsbtodb(uspi, b) ((b) << (uspi)->s_fsbtodb) 207 #define ufs_dbtofsb(uspi, b) ((b) >> (uspi)->s_fsbtodb) 208 209 /* 210 * Cylinder group macros to locate things in cylinder groups. 211 * They calc file system addresses of cylinder group data structures. 212 */ 213 #define ufs_cgbase(c) (uspi->s_fpg * (c)) 214 #define ufs_cgstart(c) ((uspi)->fs_magic == UFS2_MAGIC ? ufs_cgbase(c) : \ 215 (ufs_cgbase(c) + uspi->s_cgoffset * ((c) & ~uspi->s_cgmask))) 216 #define ufs_cgsblock(c) (ufs_cgstart(c) + uspi->s_sblkno) /* super blk */ 217 #define ufs_cgcmin(c) (ufs_cgstart(c) + uspi->s_cblkno) /* cg block */ 218 #define ufs_cgimin(c) (ufs_cgstart(c) + uspi->s_iblkno) /* inode blk */ 219 #define ufs_cgdmin(c) (ufs_cgstart(c) + uspi->s_dblkno) /* 1st data */ 220 221 /* 222 * Macros for handling inode numbers: 223 * inode number to file system block offset. 224 * inode number to cylinder group number. 225 * inode number to file system block address. 226 */ 227 #define ufs_inotocg(x) ((x) / uspi->s_ipg) 228 #define ufs_inotocgoff(x) ((x) % uspi->s_ipg) 229 #define ufs_inotofsba(x) (((u64)ufs_cgimin(ufs_inotocg(x))) + ufs_inotocgoff(x) / uspi->s_inopf) 230 #define ufs_inotofsbo(x) ((x) % uspi->s_inopf) 231 232 /* 233 * Compute the cylinder and rotational position of a cyl block addr. 234 */ 235 #define ufs_cbtocylno(bno) \ 236 ((bno) * uspi->s_nspf / uspi->s_spc) 237 #define ufs_cbtorpos(bno) \ 238 ((UFS_SB(sb)->s_flags & UFS_CG_SUN) ? \ 239 (((((bno) * uspi->s_nspf % uspi->s_spc) % \ 240 uspi->s_nsect) * \ 241 uspi->s_nrpos) / uspi->s_nsect) \ 242 : \ 243 ((((bno) * uspi->s_nspf % uspi->s_spc / uspi->s_nsect \ 244 * uspi->s_trackskew + (bno) * uspi->s_nspf % uspi->s_spc \ 245 % uspi->s_nsect * uspi->s_interleave) % uspi->s_nsect \ 246 * uspi->s_nrpos) / uspi->s_npsect)) 247 248 /* 249 * The following macros optimize certain frequently calculated 250 * quantities by using shifts and masks in place of divisions 251 * modulos and multiplications. 252 */ 253 #define ufs_blkoff(loc) ((loc) & uspi->s_qbmask) 254 #define ufs_fragoff(loc) ((loc) & uspi->s_qfmask) 255 #define ufs_lblktosize(blk) ((blk) << uspi->s_bshift) 256 #define ufs_lblkno(loc) ((loc) >> uspi->s_bshift) 257 #define ufs_numfrags(loc) ((loc) >> uspi->s_fshift) 258 #define ufs_blkroundup(size) (((size) + uspi->s_qbmask) & uspi->s_bmask) 259 #define ufs_fragroundup(size) (((size) + uspi->s_qfmask) & uspi->s_fmask) 260 #define ufs_fragstoblks(frags) ((frags) >> uspi->s_fpbshift) 261 #define ufs_blkstofrags(blks) ((blks) << uspi->s_fpbshift) 262 #define ufs_fragnum(fsb) ((fsb) & uspi->s_fpbmask) 263 #define ufs_blknum(fsb) ((fsb) & ~uspi->s_fpbmask) 264 265 #define UFS_MAXNAMLEN 255 266 #define UFS_MAXMNTLEN 512 267 #define UFS2_MAXMNTLEN 468 268 #define UFS2_MAXVOLLEN 32 269 #define UFS_MAXCSBUFS 31 270 #define UFS_LINK_MAX 32000 271 /* 272 #define UFS2_NOCSPTRS ((128 / sizeof(void *)) - 4) 273 */ 274 #define UFS2_NOCSPTRS 28 275 276 /* 277 * UFS_DIR_PAD defines the directory entries boundaries 278 * (must be a multiple of 4) 279 */ 280 #define UFS_DIR_PAD 4 281 #define UFS_DIR_ROUND (UFS_DIR_PAD - 1) 282 #define UFS_DIR_REC_LEN(name_len) (((name_len) + 1 + 8 + UFS_DIR_ROUND) & ~UFS_DIR_ROUND) 283 284 struct ufs_timeval { 285 __fs32 tv_sec; 286 __fs32 tv_usec; 287 }; 288 289 struct ufs_dir_entry { 290 __fs32 d_ino; /* inode number of this entry */ 291 __fs16 d_reclen; /* length of this entry */ 292 union { 293 __fs16 d_namlen; /* actual length of d_name */ 294 struct { 295 __u8 d_type; /* file type */ 296 __u8 d_namlen; /* length of string in d_name */ 297 } d_44; 298 } d_u; 299 __u8 d_name[UFS_MAXNAMLEN + 1]; /* file name */ 300 }; 301 302 struct ufs_csum { 303 __fs32 cs_ndir; /* number of directories */ 304 __fs32 cs_nbfree; /* number of free blocks */ 305 __fs32 cs_nifree; /* number of free inodes */ 306 __fs32 cs_nffree; /* number of free frags */ 307 }; 308 struct ufs2_csum_total { 309 __fs64 cs_ndir; /* number of directories */ 310 __fs64 cs_nbfree; /* number of free blocks */ 311 __fs64 cs_nifree; /* number of free inodes */ 312 __fs64 cs_nffree; /* number of free frags */ 313 __fs64 cs_numclusters; /* number of free clusters */ 314 __fs64 cs_spare[3]; /* future expansion */ 315 }; 316 317 struct ufs_csum_core { 318 __u64 cs_ndir; /* number of directories */ 319 __u64 cs_nbfree; /* number of free blocks */ 320 __u64 cs_nifree; /* number of free inodes */ 321 __u64 cs_nffree; /* number of free frags */ 322 __u64 cs_numclusters; /* number of free clusters */ 323 }; 324 325 /* 326 * File system flags 327 */ 328 #define UFS_UNCLEAN 0x01 /* file system not clean at mount (unused) */ 329 #define UFS_DOSOFTDEP 0x02 /* file system using soft dependencies */ 330 #define UFS_NEEDSFSCK 0x04 /* needs sync fsck (FreeBSD compat, unused) */ 331 #define UFS_INDEXDIRS 0x08 /* kernel supports indexed directories */ 332 #define UFS_ACLS 0x10 /* file system has ACLs enabled */ 333 #define UFS_MULTILABEL 0x20 /* file system is MAC multi-label */ 334 #define UFS_FLAGS_UPDATED 0x80 /* flags have been moved to new location */ 335 336 #if 0 337 /* 338 * This is the actual superblock, as it is laid out on the disk. 339 * Do NOT use this structure, because of sizeof(ufs_super_block) > 512 and 340 * it may occupy several blocks, use 341 * struct ufs_super_block_(first,second,third) instead. 342 */ 343 struct ufs_super_block { 344 union { 345 struct { 346 __fs32 fs_link; /* UNUSED */ 347 } fs_42; 348 struct { 349 __fs32 fs_state; /* file system state flag */ 350 } fs_sun; 351 } fs_u0; 352 __fs32 fs_rlink; /* UNUSED */ 353 __fs32 fs_sblkno; /* addr of super-block in filesys */ 354 __fs32 fs_cblkno; /* offset of cyl-block in filesys */ 355 __fs32 fs_iblkno; /* offset of inode-blocks in filesys */ 356 __fs32 fs_dblkno; /* offset of first data after cg */ 357 __fs32 fs_cgoffset; /* cylinder group offset in cylinder */ 358 __fs32 fs_cgmask; /* used to calc mod fs_ntrak */ 359 __fs32 fs_time; /* last time written -- time_t */ 360 __fs32 fs_size; /* number of blocks in fs */ 361 __fs32 fs_dsize; /* number of data blocks in fs */ 362 __fs32 fs_ncg; /* number of cylinder groups */ 363 __fs32 fs_bsize; /* size of basic blocks in fs */ 364 __fs32 fs_fsize; /* size of frag blocks in fs */ 365 __fs32 fs_frag; /* number of frags in a block in fs */ 366 /* these are configuration parameters */ 367 __fs32 fs_minfree; /* minimum percentage of free blocks */ 368 __fs32 fs_rotdelay; /* num of ms for optimal next block */ 369 __fs32 fs_rps; /* disk revolutions per second */ 370 /* these fields can be computed from the others */ 371 __fs32 fs_bmask; /* ``blkoff'' calc of blk offsets */ 372 __fs32 fs_fmask; /* ``fragoff'' calc of frag offsets */ 373 __fs32 fs_bshift; /* ``lblkno'' calc of logical blkno */ 374 __fs32 fs_fshift; /* ``numfrags'' calc number of frags */ 375 /* these are configuration parameters */ 376 __fs32 fs_maxcontig; /* max number of contiguous blks */ 377 __fs32 fs_maxbpg; /* max number of blks per cyl group */ 378 /* these fields can be computed from the others */ 379 __fs32 fs_fragshift; /* block to frag shift */ 380 __fs32 fs_fsbtodb; /* fsbtodb and dbtofsb shift constant */ 381 __fs32 fs_sbsize; /* actual size of super block */ 382 __fs32 fs_csmask; /* csum block offset */ 383 __fs32 fs_csshift; /* csum block number */ 384 __fs32 fs_nindir; /* value of NINDIR */ 385 __fs32 fs_inopb; /* value of INOPB */ 386 __fs32 fs_nspf; /* value of NSPF */ 387 /* yet another configuration parameter */ 388 __fs32 fs_optim; /* optimization preference, see below */ 389 /* these fields are derived from the hardware */ 390 union { 391 struct { 392 __fs32 fs_npsect; /* # sectors/track including spares */ 393 } fs_sun; 394 struct { 395 __fs32 fs_state; /* file system state time stamp */ 396 } fs_sunx86; 397 } fs_u1; 398 __fs32 fs_interleave; /* hardware sector interleave */ 399 __fs32 fs_trackskew; /* sector 0 skew, per track */ 400 /* a unique id for this filesystem (currently unused and unmaintained) */ 401 /* In 4.3 Tahoe this space is used by fs_headswitch and fs_trkseek */ 402 /* Neither of those fields is used in the Tahoe code right now but */ 403 /* there could be problems if they are. */ 404 __fs32 fs_id[2]; /* file system id */ 405 /* sizes determined by number of cylinder groups and their sizes */ 406 __fs32 fs_csaddr; /* blk addr of cyl grp summary area */ 407 __fs32 fs_cssize; /* size of cyl grp summary area */ 408 __fs32 fs_cgsize; /* cylinder group size */ 409 /* these fields are derived from the hardware */ 410 __fs32 fs_ntrak; /* tracks per cylinder */ 411 __fs32 fs_nsect; /* sectors per track */ 412 __fs32 fs_spc; /* sectors per cylinder */ 413 /* this comes from the disk driver partitioning */ 414 __fs32 fs_ncyl; /* cylinders in file system */ 415 /* these fields can be computed from the others */ 416 __fs32 fs_cpg; /* cylinders per group */ 417 __fs32 fs_ipg; /* inodes per cylinder group */ 418 __fs32 fs_fpg; /* blocks per group * fs_frag */ 419 /* this data must be re-computed after crashes */ 420 struct ufs_csum fs_cstotal; /* cylinder summary information */ 421 /* these fields are cleared at mount time */ 422 __s8 fs_fmod; /* super block modified flag */ 423 __s8 fs_clean; /* file system is clean flag */ 424 __s8 fs_ronly; /* mounted read-only flag */ 425 __s8 fs_flags; 426 union { 427 struct { 428 __s8 fs_fsmnt[UFS_MAXMNTLEN];/* name mounted on */ 429 __fs32 fs_cgrotor; /* last cg searched */ 430 __fs32 fs_csp[UFS_MAXCSBUFS];/*list of fs_cs info buffers */ 431 __fs32 fs_maxcluster; 432 __fs32 fs_cpc; /* cyl per cycle in postbl */ 433 __fs16 fs_opostbl[16][8]; /* old rotation block list head */ 434 } fs_u1; 435 struct { 436 __s8 fs_fsmnt[UFS2_MAXMNTLEN]; /* name mounted on */ 437 __u8 fs_volname[UFS2_MAXVOLLEN]; /* volume name */ 438 __fs64 fs_swuid; /* system-wide uid */ 439 __fs32 fs_pad; /* due to alignment of fs_swuid */ 440 __fs32 fs_cgrotor; /* last cg searched */ 441 __fs32 fs_ocsp[UFS2_NOCSPTRS]; /*list of fs_cs info buffers */ 442 __fs32 fs_contigdirs;/*# of contiguously allocated dirs */ 443 __fs32 fs_csp; /* cg summary info buffer for fs_cs */ 444 __fs32 fs_maxcluster; 445 __fs32 fs_active;/* used by snapshots to track fs */ 446 __fs32 fs_old_cpc; /* cyl per cycle in postbl */ 447 __fs32 fs_maxbsize;/*maximum blocking factor permitted */ 448 __fs64 fs_sparecon64[17];/*old rotation block list head */ 449 __fs64 fs_sblockloc; /* byte offset of standard superblock */ 450 struct ufs2_csum_total fs_cstotal;/*cylinder summary information*/ 451 struct ufs_timeval fs_time; /* last time written */ 452 __fs64 fs_size; /* number of blocks in fs */ 453 __fs64 fs_dsize; /* number of data blocks in fs */ 454 __fs64 fs_csaddr; /* blk addr of cyl grp summary area */ 455 __fs64 fs_pendingblocks;/* blocks in process of being freed */ 456 __fs32 fs_pendinginodes;/*inodes in process of being freed */ 457 } fs_u2; 458 } fs_u11; 459 union { 460 struct { 461 __fs32 fs_sparecon[53];/* reserved for future constants */ 462 __fs32 fs_reclaim; 463 __fs32 fs_sparecon2[1]; 464 __fs32 fs_state; /* file system state time stamp */ 465 __fs32 fs_qbmask[2]; /* ~usb_bmask */ 466 __fs32 fs_qfmask[2]; /* ~usb_fmask */ 467 } fs_sun; 468 struct { 469 __fs32 fs_sparecon[53];/* reserved for future constants */ 470 __fs32 fs_reclaim; 471 __fs32 fs_sparecon2[1]; 472 __fs32 fs_npsect; /* # sectors/track including spares */ 473 __fs32 fs_qbmask[2]; /* ~usb_bmask */ 474 __fs32 fs_qfmask[2]; /* ~usb_fmask */ 475 } fs_sunx86; 476 struct { 477 __fs32 fs_sparecon[50];/* reserved for future constants */ 478 __fs32 fs_contigsumsize;/* size of cluster summary array */ 479 __fs32 fs_maxsymlinklen;/* max length of an internal symlink */ 480 __fs32 fs_inodefmt; /* format of on-disk inodes */ 481 __fs32 fs_maxfilesize[2]; /* max representable file size */ 482 __fs32 fs_qbmask[2]; /* ~usb_bmask */ 483 __fs32 fs_qfmask[2]; /* ~usb_fmask */ 484 __fs32 fs_state; /* file system state time stamp */ 485 } fs_44; 486 } fs_u2; 487 __fs32 fs_postblformat; /* format of positional layout tables */ 488 __fs32 fs_nrpos; /* number of rotational positions */ 489 __fs32 fs_postbloff; /* (__s16) rotation block list head */ 490 __fs32 fs_rotbloff; /* (__u8) blocks for each rotation */ 491 __fs32 fs_magic; /* magic number */ 492 __u8 fs_space[1]; /* list of blocks for each rotation */ 493 }; 494 #endif/*struct ufs_super_block*/ 495 496 /* 497 * Preference for optimization. 498 */ 499 #define UFS_OPTTIME 0 /* minimize allocation time */ 500 #define UFS_OPTSPACE 1 /* minimize disk fragmentation */ 501 502 /* 503 * Rotational layout table format types 504 */ 505 #define UFS_42POSTBLFMT -1 /* 4.2BSD rotational table format */ 506 #define UFS_DYNAMICPOSTBLFMT 1 /* dynamic rotational table format */ 507 508 /* 509 * Convert cylinder group to base address of its global summary info. 510 */ 511 #define fs_cs(indx) s_csp[(indx)] 512 513 /* 514 * Cylinder group block for a file system. 515 * 516 * Writable fields in the cylinder group are protected by the associated 517 * super block lock fs->fs_lock. 518 */ 519 #define CG_MAGIC 0x090255 520 #define ufs_cg_chkmagic(sb, ucg) \ 521 (fs32_to_cpu((sb), (ucg)->cg_magic) == CG_MAGIC) 522 /* 523 * Macros for access to old cylinder group array structures 524 */ 525 #define ufs_ocg_blktot(sb, ucg) fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_btot) 526 #define ufs_ocg_blks(sb, ucg, cylno) fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_b[cylno]) 527 #define ufs_ocg_inosused(sb, ucg) fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_iused) 528 #define ufs_ocg_blksfree(sb, ucg) fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_free) 529 #define ufs_ocg_chkmagic(sb, ucg) \ 530 (fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_magic) == CG_MAGIC) 531 532 /* 533 * size of this structure is 172 B 534 */ 535 struct ufs_cylinder_group { 536 __fs32 cg_link; /* linked list of cyl groups */ 537 __fs32 cg_magic; /* magic number */ 538 __fs32 cg_time; /* time last written */ 539 __fs32 cg_cgx; /* we are the cgx'th cylinder group */ 540 __fs16 cg_ncyl; /* number of cyl's this cg */ 541 __fs16 cg_niblk; /* number of inode blocks this cg */ 542 __fs32 cg_ndblk; /* number of data blocks this cg */ 543 struct ufs_csum cg_cs; /* cylinder summary information */ 544 __fs32 cg_rotor; /* position of last used block */ 545 __fs32 cg_frotor; /* position of last used frag */ 546 __fs32 cg_irotor; /* position of last used inode */ 547 __fs32 cg_frsum[UFS_MAXFRAG]; /* counts of available frags */ 548 __fs32 cg_btotoff; /* (__u32) block totals per cylinder */ 549 __fs32 cg_boff; /* (short) free block positions */ 550 __fs32 cg_iusedoff; /* (char) used inode map */ 551 __fs32 cg_freeoff; /* (u_char) free block map */ 552 __fs32 cg_nextfreeoff; /* (u_char) next available space */ 553 union { 554 struct { 555 __fs32 cg_clustersumoff; /* (u_int32) counts of avail clusters */ 556 __fs32 cg_clusteroff; /* (u_int8) free cluster map */ 557 __fs32 cg_nclusterblks; /* number of clusters this cg */ 558 __fs32 cg_sparecon[13]; /* reserved for future use */ 559 } cg_44; 560 struct { 561 __fs32 cg_clustersumoff;/* (u_int32) counts of avail clusters */ 562 __fs32 cg_clusteroff; /* (u_int8) free cluster map */ 563 __fs32 cg_nclusterblks;/* number of clusters this cg */ 564 __fs32 cg_niblk; /* number of inode blocks this cg */ 565 __fs32 cg_initediblk; /* last initialized inode */ 566 __fs32 cg_sparecon32[3];/* reserved for future use */ 567 __fs64 cg_time; /* time last written */ 568 __fs64 cg_sparecon[3]; /* reserved for future use */ 569 } cg_u2; 570 __fs32 cg_sparecon[16]; /* reserved for future use */ 571 } cg_u; 572 __u8 cg_space[1]; /* space for cylinder group maps */ 573 /* actually longer */ 574 }; 575 576 /* Historic Cylinder group info */ 577 struct ufs_old_cylinder_group { 578 __fs32 cg_link; /* linked list of cyl groups */ 579 __fs32 cg_rlink; /* for incore cyl groups */ 580 __fs32 cg_time; /* time last written */ 581 __fs32 cg_cgx; /* we are the cgx'th cylinder group */ 582 __fs16 cg_ncyl; /* number of cyl's this cg */ 583 __fs16 cg_niblk; /* number of inode blocks this cg */ 584 __fs32 cg_ndblk; /* number of data blocks this cg */ 585 struct ufs_csum cg_cs; /* cylinder summary information */ 586 __fs32 cg_rotor; /* position of last used block */ 587 __fs32 cg_frotor; /* position of last used frag */ 588 __fs32 cg_irotor; /* position of last used inode */ 589 __fs32 cg_frsum[8]; /* counts of available frags */ 590 __fs32 cg_btot[32]; /* block totals per cylinder */ 591 __fs16 cg_b[32][8]; /* positions of free blocks */ 592 __u8 cg_iused[256]; /* used inode map */ 593 __fs32 cg_magic; /* magic number */ 594 __u8 cg_free[1]; /* free block map */ 595 /* actually longer */ 596 }; 597 598 /* 599 * structure of an on-disk inode 600 */ 601 struct ufs_inode { 602 __fs16 ui_mode; /* 0x0 */ 603 __fs16 ui_nlink; /* 0x2 */ 604 union { 605 struct { 606 __fs16 ui_suid; /* 0x4 */ 607 __fs16 ui_sgid; /* 0x6 */ 608 } oldids; 609 __fs32 ui_inumber; /* 0x4 lsf: inode number */ 610 __fs32 ui_author; /* 0x4 GNU HURD: author */ 611 } ui_u1; 612 __fs64 ui_size; /* 0x8 */ 613 struct ufs_timeval ui_atime; /* 0x10 access */ 614 struct ufs_timeval ui_mtime; /* 0x18 modification */ 615 struct ufs_timeval ui_ctime; /* 0x20 creation */ 616 union { 617 struct { 618 __fs32 ui_db[UFS_NDADDR];/* 0x28 data blocks */ 619 __fs32 ui_ib[UFS_NINDIR];/* 0x58 indirect blocks */ 620 } ui_addr; 621 __u8 ui_symlink[4*(UFS_NDADDR+UFS_NINDIR)];/* 0x28 fast symlink */ 622 } ui_u2; 623 __fs32 ui_flags; /* 0x64 immutable, append-only... */ 624 __fs32 ui_blocks; /* 0x68 blocks in use */ 625 __fs32 ui_gen; /* 0x6c like ext2 i_version, for NFS support */ 626 union { 627 struct { 628 __fs32 ui_shadow; /* 0x70 shadow inode with security data */ 629 __fs32 ui_uid; /* 0x74 long EFT version of uid */ 630 __fs32 ui_gid; /* 0x78 long EFT version of gid */ 631 __fs32 ui_oeftflag; /* 0x7c reserved */ 632 } ui_sun; 633 struct { 634 __fs32 ui_uid; /* 0x70 File owner */ 635 __fs32 ui_gid; /* 0x74 File group */ 636 __fs32 ui_spare[2]; /* 0x78 reserved */ 637 } ui_44; 638 struct { 639 __fs32 ui_uid; /* 0x70 */ 640 __fs32 ui_gid; /* 0x74 */ 641 __fs16 ui_modeh; /* 0x78 mode high bits */ 642 __fs16 ui_spare; /* 0x7A unused */ 643 __fs32 ui_trans; /* 0x7c filesystem translator */ 644 } ui_hurd; 645 } ui_u3; 646 }; 647 648 #define UFS_NXADDR 2 /* External addresses in inode. */ 649 struct ufs2_inode { 650 __fs16 ui_mode; /* 0: IFMT, permissions; see below. */ 651 __fs16 ui_nlink; /* 2: File link count. */ 652 __fs32 ui_uid; /* 4: File owner. */ 653 __fs32 ui_gid; /* 8: File group. */ 654 __fs32 ui_blksize; /* 12: Inode blocksize. */ 655 __fs64 ui_size; /* 16: File byte count. */ 656 __fs64 ui_blocks; /* 24: Bytes actually held. */ 657 __fs64 ui_atime; /* 32: Last access time. */ 658 __fs64 ui_mtime; /* 40: Last modified time. */ 659 __fs64 ui_ctime; /* 48: Last inode change time. */ 660 __fs64 ui_birthtime; /* 56: Inode creation time. */ 661 __fs32 ui_mtimensec; /* 64: Last modified time. */ 662 __fs32 ui_atimensec; /* 68: Last access time. */ 663 __fs32 ui_ctimensec; /* 72: Last inode change time. */ 664 __fs32 ui_birthnsec; /* 76: Inode creation time. */ 665 __fs32 ui_gen; /* 80: Generation number. */ 666 __fs32 ui_kernflags; /* 84: Kernel flags. */ 667 __fs32 ui_flags; /* 88: Status flags (chflags). */ 668 __fs32 ui_extsize; /* 92: External attributes block. */ 669 __fs64 ui_extb[UFS_NXADDR];/* 96: External attributes block. */ 670 union { 671 struct { 672 __fs64 ui_db[UFS_NDADDR]; /* 112: Direct disk blocks. */ 673 __fs64 ui_ib[UFS_NINDIR];/* 208: Indirect disk blocks.*/ 674 } ui_addr; 675 __u8 ui_symlink[2*4*(UFS_NDADDR+UFS_NINDIR)];/* 0x28 fast symlink */ 676 } ui_u2; 677 __fs64 ui_spare[3]; /* 232: Reserved; currently unused */ 678 }; 679 680 681 /* FreeBSD has these in sys/stat.h */ 682 /* ui_flags that can be set by a file owner */ 683 #define UFS_UF_SETTABLE 0x0000ffff 684 #define UFS_UF_NODUMP 0x00000001 /* do not dump */ 685 #define UFS_UF_IMMUTABLE 0x00000002 /* immutable (can't "change") */ 686 #define UFS_UF_APPEND 0x00000004 /* append-only */ 687 #define UFS_UF_OPAQUE 0x00000008 /* directory is opaque (unionfs) */ 688 #define UFS_UF_NOUNLINK 0x00000010 /* can't be removed or renamed */ 689 /* ui_flags that only root can set */ 690 #define UFS_SF_SETTABLE 0xffff0000 691 #define UFS_SF_ARCHIVED 0x00010000 /* archived */ 692 #define UFS_SF_IMMUTABLE 0x00020000 /* immutable (can't "change") */ 693 #define UFS_SF_APPEND 0x00040000 /* append-only */ 694 #define UFS_SF_NOUNLINK 0x00100000 /* can't be removed or renamed */ 695 696 /* 697 * This structure is used for reading disk structures larger 698 * than the size of fragment. 699 */ 700 struct ufs_buffer_head { 701 __u64 fragment; /* first fragment */ 702 __u64 count; /* number of fragments */ 703 struct buffer_head * bh[UFS_MAXFRAG]; /* buffers */ 704 }; 705 706 struct ufs_cg_private_info { 707 struct ufs_buffer_head c_ubh; 708 __u32 c_cgx; /* number of cylidner group */ 709 __u16 c_ncyl; /* number of cyl's this cg */ 710 __u16 c_niblk; /* number of inode blocks this cg */ 711 __u32 c_ndblk; /* number of data blocks this cg */ 712 __u32 c_rotor; /* position of last used block */ 713 __u32 c_frotor; /* position of last used frag */ 714 __u32 c_irotor; /* position of last used inode */ 715 __u32 c_btotoff; /* (__u32) block totals per cylinder */ 716 __u32 c_boff; /* (short) free block positions */ 717 __u32 c_iusedoff; /* (char) used inode map */ 718 __u32 c_freeoff; /* (u_char) free block map */ 719 __u32 c_nextfreeoff; /* (u_char) next available space */ 720 __u32 c_clustersumoff;/* (u_int32) counts of avail clusters */ 721 __u32 c_clusteroff; /* (u_int8) free cluster map */ 722 __u32 c_nclusterblks; /* number of clusters this cg */ 723 }; 724 725 726 struct ufs_sb_private_info { 727 struct ufs_buffer_head s_ubh; /* buffer containing super block */ 728 struct ufs_csum_core cs_total; 729 __u32 s_sblkno; /* offset of super-blocks in filesys */ 730 __u32 s_cblkno; /* offset of cg-block in filesys */ 731 __u32 s_iblkno; /* offset of inode-blocks in filesys */ 732 __u32 s_dblkno; /* offset of first data after cg */ 733 __u32 s_cgoffset; /* cylinder group offset in cylinder */ 734 __u32 s_cgmask; /* used to calc mod fs_ntrak */ 735 __u32 s_size; /* number of blocks (fragments) in fs */ 736 __u32 s_dsize; /* number of data blocks in fs */ 737 __u64 s_u2_size; /* ufs2: number of blocks (fragments) in fs */ 738 __u64 s_u2_dsize; /*ufs2: number of data blocks in fs */ 739 __u32 s_ncg; /* number of cylinder groups */ 740 __u32 s_bsize; /* size of basic blocks */ 741 __u32 s_fsize; /* size of fragments */ 742 __u32 s_fpb; /* fragments per block */ 743 __u32 s_minfree; /* minimum percentage of free blocks */ 744 __u32 s_bmask; /* `blkoff'' calc of blk offsets */ 745 __u32 s_fmask; /* s_fsize mask */ 746 __u32 s_bshift; /* `lblkno'' calc of logical blkno */ 747 __u32 s_fshift; /* s_fsize shift */ 748 __u32 s_fpbshift; /* fragments per block shift */ 749 __u32 s_fsbtodb; /* fsbtodb and dbtofsb shift constant */ 750 __u32 s_sbsize; /* actual size of super block */ 751 __u32 s_csmask; /* csum block offset */ 752 __u32 s_csshift; /* csum block number */ 753 __u32 s_nindir; /* value of NINDIR */ 754 __u32 s_inopb; /* value of INOPB */ 755 __u32 s_nspf; /* value of NSPF */ 756 __u32 s_npsect; /* # sectors/track including spares */ 757 __u32 s_interleave; /* hardware sector interleave */ 758 __u32 s_trackskew; /* sector 0 skew, per track */ 759 __u64 s_csaddr; /* blk addr of cyl grp summary area */ 760 __u32 s_cssize; /* size of cyl grp summary area */ 761 __u32 s_cgsize; /* cylinder group size */ 762 __u32 s_ntrak; /* tracks per cylinder */ 763 __u32 s_nsect; /* sectors per track */ 764 __u32 s_spc; /* sectors per cylinder */ 765 __u32 s_ipg; /* inodes per cylinder group */ 766 __u32 s_fpg; /* fragments per group */ 767 __u32 s_cpc; /* cyl per cycle in postbl */ 768 __s32 s_contigsumsize;/* size of cluster summary array, 44bsd */ 769 __s64 s_qbmask; /* ~usb_bmask */ 770 __s64 s_qfmask; /* ~usb_fmask */ 771 __s32 s_postblformat; /* format of positional layout tables */ 772 __s32 s_nrpos; /* number of rotational positions */ 773 __s32 s_postbloff; /* (__s16) rotation block list head */ 774 __s32 s_rotbloff; /* (__u8) blocks for each rotation */ 775 776 __u32 s_fpbmask; /* fragments per block mask */ 777 __u32 s_apb; /* address per block */ 778 __u32 s_2apb; /* address per block^2 */ 779 __u32 s_3apb; /* address per block^3 */ 780 __u32 s_apbmask; /* address per block mask */ 781 __u32 s_apbshift; /* address per block shift */ 782 __u32 s_2apbshift; /* address per block shift * 2 */ 783 __u32 s_3apbshift; /* address per block shift * 3 */ 784 __u32 s_nspfshift; /* number of sector per fragment shift */ 785 __u32 s_nspb; /* number of sector per block */ 786 __u32 s_inopf; /* inodes per fragment */ 787 __u32 s_sbbase; /* offset of NeXTstep superblock */ 788 __u32 s_bpf; /* bits per fragment */ 789 __u32 s_bpfshift; /* bits per fragment shift*/ 790 __u32 s_bpfmask; /* bits per fragment mask */ 791 792 __u32 s_maxsymlinklen;/* upper limit on fast symlinks' size */ 793 __s32 fs_magic; /* filesystem magic */ 794 unsigned int s_dirblksize; 795 }; 796 797 /* 798 * Sizes of this structures are: 799 * ufs_super_block_first 512 800 * ufs_super_block_second 512 801 * ufs_super_block_third 356 802 */ 803 struct ufs_super_block_first { 804 union { 805 struct { 806 __fs32 fs_link; /* UNUSED */ 807 } fs_42; 808 struct { 809 __fs32 fs_state; /* file system state flag */ 810 } fs_sun; 811 } fs_u0; 812 __fs32 fs_rlink; 813 __fs32 fs_sblkno; 814 __fs32 fs_cblkno; 815 __fs32 fs_iblkno; 816 __fs32 fs_dblkno; 817 __fs32 fs_cgoffset; 818 __fs32 fs_cgmask; 819 __fs32 fs_time; 820 __fs32 fs_size; 821 __fs32 fs_dsize; 822 __fs32 fs_ncg; 823 __fs32 fs_bsize; 824 __fs32 fs_fsize; 825 __fs32 fs_frag; 826 __fs32 fs_minfree; 827 __fs32 fs_rotdelay; 828 __fs32 fs_rps; 829 __fs32 fs_bmask; 830 __fs32 fs_fmask; 831 __fs32 fs_bshift; 832 __fs32 fs_fshift; 833 __fs32 fs_maxcontig; 834 __fs32 fs_maxbpg; 835 __fs32 fs_fragshift; 836 __fs32 fs_fsbtodb; 837 __fs32 fs_sbsize; 838 __fs32 fs_csmask; 839 __fs32 fs_csshift; 840 __fs32 fs_nindir; 841 __fs32 fs_inopb; 842 __fs32 fs_nspf; 843 __fs32 fs_optim; 844 union { 845 struct { 846 __fs32 fs_npsect; 847 } fs_sun; 848 struct { 849 __fs32 fs_state; 850 } fs_sunx86; 851 } fs_u1; 852 __fs32 fs_interleave; 853 __fs32 fs_trackskew; 854 __fs32 fs_id[2]; 855 __fs32 fs_csaddr; 856 __fs32 fs_cssize; 857 __fs32 fs_cgsize; 858 __fs32 fs_ntrak; 859 __fs32 fs_nsect; 860 __fs32 fs_spc; 861 __fs32 fs_ncyl; 862 __fs32 fs_cpg; 863 __fs32 fs_ipg; 864 __fs32 fs_fpg; 865 struct ufs_csum fs_cstotal; 866 __s8 fs_fmod; 867 __s8 fs_clean; 868 __s8 fs_ronly; 869 __s8 fs_flags; 870 __s8 fs_fsmnt[UFS_MAXMNTLEN - 212]; 871 872 }; 873 874 struct ufs_super_block_second { 875 union { 876 struct { 877 __s8 fs_fsmnt[212]; 878 __fs32 fs_cgrotor; 879 __fs32 fs_csp[UFS_MAXCSBUFS]; 880 __fs32 fs_maxcluster; 881 __fs32 fs_cpc; 882 __fs16 fs_opostbl[82]; 883 } fs_u1; 884 struct { 885 __s8 fs_fsmnt[UFS2_MAXMNTLEN - UFS_MAXMNTLEN + 212]; 886 __u8 fs_volname[UFS2_MAXVOLLEN]; 887 __fs64 fs_swuid; 888 __fs32 fs_pad; 889 __fs32 fs_cgrotor; 890 __fs32 fs_ocsp[UFS2_NOCSPTRS]; 891 __fs32 fs_contigdirs; 892 __fs32 fs_csp; 893 __fs32 fs_maxcluster; 894 __fs32 fs_active; 895 __fs32 fs_old_cpc; 896 __fs32 fs_maxbsize; 897 __fs64 fs_sparecon64[17]; 898 __fs64 fs_sblockloc; 899 __fs64 cs_ndir; 900 __fs64 cs_nbfree; 901 } fs_u2; 902 } fs_un; 903 }; 904 905 struct ufs_super_block_third { 906 union { 907 struct { 908 __fs16 fs_opostbl[46]; 909 } fs_u1; 910 struct { 911 __fs64 cs_nifree; /* number of free inodes */ 912 __fs64 cs_nffree; /* number of free frags */ 913 __fs64 cs_numclusters; /* number of free clusters */ 914 __fs64 cs_spare[3]; /* future expansion */ 915 struct ufs_timeval fs_time; /* last time written */ 916 __fs64 fs_size; /* number of blocks in fs */ 917 __fs64 fs_dsize; /* number of data blocks in fs */ 918 __fs64 fs_csaddr; /* blk addr of cyl grp summary area */ 919 __fs64 fs_pendingblocks;/* blocks in process of being freed */ 920 __fs32 fs_pendinginodes;/*inodes in process of being freed */ 921 } __attribute__ ((packed)) fs_u2; 922 } fs_un1; 923 union { 924 struct { 925 __fs32 fs_sparecon[53];/* reserved for future constants */ 926 __fs32 fs_reclaim; 927 __fs32 fs_sparecon2[1]; 928 __fs32 fs_state; /* file system state time stamp */ 929 __fs32 fs_qbmask[2]; /* ~usb_bmask */ 930 __fs32 fs_qfmask[2]; /* ~usb_fmask */ 931 } fs_sun; 932 struct { 933 __fs32 fs_sparecon[53];/* reserved for future constants */ 934 __fs32 fs_reclaim; 935 __fs32 fs_sparecon2[1]; 936 __fs32 fs_npsect; /* # sectors/track including spares */ 937 __fs32 fs_qbmask[2]; /* ~usb_bmask */ 938 __fs32 fs_qfmask[2]; /* ~usb_fmask */ 939 } fs_sunx86; 940 struct { 941 __fs32 fs_sparecon[50];/* reserved for future constants */ 942 __fs32 fs_contigsumsize;/* size of cluster summary array */ 943 __fs32 fs_maxsymlinklen;/* max length of an internal symlink */ 944 __fs32 fs_inodefmt; /* format of on-disk inodes */ 945 __fs32 fs_maxfilesize[2]; /* max representable file size */ 946 __fs32 fs_qbmask[2]; /* ~usb_bmask */ 947 __fs32 fs_qfmask[2]; /* ~usb_fmask */ 948 __fs32 fs_state; /* file system state time stamp */ 949 } fs_44; 950 } fs_un2; 951 __fs32 fs_postblformat; 952 __fs32 fs_nrpos; 953 __fs32 fs_postbloff; 954 __fs32 fs_rotbloff; 955 __fs32 fs_magic; 956 __u8 fs_space[1]; 957 }; 958 959 #endif /* __LINUX_UFS_FS_H */ 960