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