1/* SPDX-License-Identifier: GPL-2.0 */ 2/* 3 * linux/include/linux/ufs_fs.h 4 * 5 * Copyright (C) 1996 6 * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu) 7 * Laboratory for Computer Science Research Computing Facility 8 * Rutgers, The State University of New Jersey 9 * 10 * Clean swab support by Fare <fare@tunes.org> 11 * just hope no one is using NNUUXXI on __?64 structure elements 12 * 64-bit clean thanks to Maciej W. Rozycki <macro@ds2.pg.gda.pl> 13 * 14 * 4.4BSD (FreeBSD) support added on February 1st 1998 by 15 * Niels Kristian Bech Jensen <nkbj@image.dk> partially based 16 * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>. 17 * 18 * NeXTstep support added on February 5th 1998 by 19 * Niels Kristian Bech Jensen <nkbj@image.dk>. 20 * 21 * Write support by Daniel Pirkl <daniel.pirkl@email.cz> 22 * 23 * HP/UX hfs filesystem support added by 24 * Martin K. Petersen <mkp@mkp.net>, August 1999 25 * 26 * UFS2 (of FreeBSD 5.x) support added by 27 * Niraj Kumar <niraj17@iitbombay.org> , Jan 2004 28 * 29 */ 30 31#ifndef __LINUX_UFS_FS_H 32#define __LINUX_UFS_FS_H 33 34#include <linux/types.h> 35#include <linux/kernel.h> 36#include <linux/stat.h> 37#include <linux/fs.h> 38#include <linux/workqueue.h> 39 40#include <asm/div64.h> 41typedef __u64 __bitwise __fs64; 42typedef __u32 __bitwise __fs32; 43typedef __u16 __bitwise __fs16; 44 45#define UFS_BBLOCK 0 46#define UFS_BBSIZE 8192 47#define UFS_SBLOCK 8192 48#define UFS_SBSIZE 8192 49 50#define UFS_SECTOR_SIZE 512 51#define UFS_SECTOR_BITS 9 52#define UFS_MAGIC 0x00011954 53#define UFS_MAGIC_BW 0x0f242697 54#define UFS2_MAGIC 0x19540119 55#define UFS_CIGAM 0x54190100 /* byteswapped MAGIC */ 56 57/* Copied from FreeBSD */ 58/* 59 * Each disk drive contains some number of filesystems. 60 * A filesystem consists of a number of cylinder groups. 61 * Each cylinder group has inodes and data. 62 * 63 * A filesystem is described by its super-block, which in turn 64 * describes the cylinder groups. The super-block is critical 65 * data and is replicated in each cylinder group to protect against 66 * catastrophic loss. This is done at `newfs' time and the critical 67 * super-block data does not change, so the copies need not be 68 * referenced further unless disaster strikes. 69 * 70 * For filesystem fs, the offsets of the various blocks of interest 71 * are given in the super block as: 72 * [fs->fs_sblkno] Super-block 73 * [fs->fs_cblkno] Cylinder group block 74 * [fs->fs_iblkno] Inode blocks 75 * [fs->fs_dblkno] Data blocks 76 * The beginning of cylinder group cg in fs, is given by 77 * the ``cgbase(fs, cg)'' macro. 78 * 79 * Depending on the architecture and the media, the superblock may 80 * reside in any one of four places. For tiny media where every block 81 * counts, it is placed at the very front of the partition. Historically, 82 * UFS1 placed it 8K from the front to leave room for the disk label and 83 * a small bootstrap. For UFS2 it got moved to 64K from the front to leave 84 * room for the disk label and a bigger bootstrap, and for really piggy 85 * systems we check at 256K from the front if the first three fail. In 86 * all cases the size of the superblock will be SBLOCKSIZE. All values are 87 * given in byte-offset form, so they do not imply a sector size. The 88 * SBLOCKSEARCH specifies the order in which the locations should be searched. 89 */ 90#define SBLOCK_FLOPPY 0 91#define SBLOCK_UFS1 8192 92#define SBLOCK_UFS2 65536 93#define SBLOCK_PIGGY 262144 94#define SBLOCKSIZE 8192 95#define SBLOCKSEARCH \ 96 { SBLOCK_UFS2, SBLOCK_UFS1, SBLOCK_FLOPPY, SBLOCK_PIGGY, -1 } 97 98 99/* HP specific MAGIC values */ 100 101#define UFS_MAGIC_LFN 0x00095014 /* fs supports filenames > 14 chars */ 102#define UFS_CIGAM_LFN 0x14500900 /* srahc 41 < semanelif stroppus sf */ 103 104#define UFS_MAGIC_SEC 0x00612195 /* B1 security fs */ 105#define UFS_CIGAM_SEC 0x95216100 106 107#define UFS_MAGIC_FEA 0x00195612 /* fs_featurebits supported */ 108#define UFS_CIGAM_FEA 0x12561900 109 110#define UFS_MAGIC_4GB 0x05231994 /* fs > 4 GB && fs_featurebits */ 111#define UFS_CIGAM_4GB 0x94192305 112 113/* Seems somebody at HP goofed here. B1 and lfs are both 0x2 !?! */ 114#define UFS_FSF_LFN 0x00000001 /* long file names */ 115#define UFS_FSF_B1 0x00000002 /* B1 security */ 116#define UFS_FSF_LFS 0x00000002 /* large files */ 117#define UFS_FSF_LUID 0x00000004 /* large UIDs */ 118 119/* End of HP stuff */ 120 121 122#define UFS_BSIZE 8192 123#define UFS_MINBSIZE 4096 124#define UFS_FSIZE 1024 125#define UFS_MAXFRAG (UFS_BSIZE / UFS_FSIZE) 126 127#define UFS_NDADDR 12 128#define UFS_NINDIR 3 129 130#define UFS_IND_BLOCK (UFS_NDADDR + 0) 131#define UFS_DIND_BLOCK (UFS_NDADDR + 1) 132#define UFS_TIND_BLOCK (UFS_NDADDR + 2) 133 134#define UFS_NDIR_FRAGMENT (UFS_NDADDR << uspi->s_fpbshift) 135#define UFS_IND_FRAGMENT (UFS_IND_BLOCK << uspi->s_fpbshift) 136#define UFS_DIND_FRAGMENT (UFS_DIND_BLOCK << uspi->s_fpbshift) 137#define UFS_TIND_FRAGMENT (UFS_TIND_BLOCK << uspi->s_fpbshift) 138 139#define UFS_ROOTINO 2 140#define UFS_FIRST_INO (UFS_ROOTINO + 1) 141 142#define UFS_USEEFT ((__u16)65535) 143 144/* fs_clean values */ 145#define UFS_FSOK 0x7c269d38 146#define UFS_FSACTIVE ((__s8)0x00) 147#define UFS_FSCLEAN ((__s8)0x01) 148#define UFS_FSSTABLE ((__s8)0x02) 149#define UFS_FSOSF1 ((__s8)0x03) /* is this correct for DEC OSF/1? */ 150#define UFS_FSBAD ((__s8)0xff) 151 152/* Solaris-specific fs_clean values */ 153#define UFS_FSSUSPEND ((__s8)0xfe) /* temporarily suspended */ 154#define UFS_FSLOG ((__s8)0xfd) /* logging fs */ 155#define UFS_FSFIX ((__s8)0xfc) /* being repaired while mounted */ 156 157/* From here to next blank line, s_flags for ufs_sb_info */ 158/* directory entry encoding */ 159#define UFS_DE_MASK 0x00000010 /* mask for the following */ 160#define UFS_DE_OLD 0x00000000 161#define UFS_DE_44BSD 0x00000010 162/* uid encoding */ 163#define UFS_UID_MASK 0x00000060 /* mask for the following */ 164#define UFS_UID_OLD 0x00000000 165#define UFS_UID_44BSD 0x00000020 166#define UFS_UID_EFT 0x00000040 167/* superblock state encoding */ 168#define UFS_ST_MASK 0x00000700 /* mask for the following */ 169#define UFS_ST_OLD 0x00000000 170#define UFS_ST_44BSD 0x00000100 171#define UFS_ST_SUN 0x00000200 /* Solaris */ 172#define UFS_ST_SUNOS 0x00000300 173#define UFS_ST_SUNx86 0x00000400 /* Solaris x86 */ 174/*cylinder group encoding */ 175#define UFS_CG_MASK 0x00003000 /* mask for the following */ 176#define UFS_CG_OLD 0x00000000 177#define UFS_CG_44BSD 0x00002000 178#define UFS_CG_SUN 0x00001000 179/* filesystem type encoding */ 180#define UFS_TYPE_MASK 0x00010000 /* mask for the following */ 181#define UFS_TYPE_UFS1 0x00000000 182#define UFS_TYPE_UFS2 0x00010000 183 184 185/* fs_inodefmt options */ 186#define UFS_42INODEFMT -1 187#define UFS_44INODEFMT 2 188 189/* 190 * MINFREE gives the minimum acceptable percentage of file system 191 * blocks which may be free. If the freelist drops below this level 192 * only the superuser may continue to allocate blocks. This may 193 * be set to 0 if no reserve of free blocks is deemed necessary, 194 * however throughput drops by fifty percent if the file system 195 * is run at between 95% and 100% full; thus the minimum default 196 * value of fs_minfree is 5%. However, to get good clustering 197 * performance, 10% is a better choice. hence we use 10% as our 198 * default value. With 10% free space, fragmentation is not a 199 * problem, so we choose to optimize for time. 200 */ 201#define UFS_MINFREE 5 202#define UFS_DEFAULTOPT UFS_OPTTIME 203 204/* 205 * Turn file system block numbers into disk block addresses. 206 * This maps file system blocks to device size blocks. 207 */ 208#define ufs_fsbtodb(uspi, b) ((b) << (uspi)->s_fsbtodb) 209#define ufs_dbtofsb(uspi, b) ((b) >> (uspi)->s_fsbtodb) 210 211/* 212 * Cylinder group macros to locate things in cylinder groups. 213 * They calc file system addresses of cylinder group data structures. 214 */ 215#define ufs_cgbase(c) (uspi->s_fpg * (c)) 216#define ufs_cgstart(c) ((uspi)->fs_magic == UFS2_MAGIC ? ufs_cgbase(c) : \ 217 (ufs_cgbase(c) + uspi->s_cgoffset * ((c) & ~uspi->s_cgmask))) 218#define ufs_cgsblock(c) (ufs_cgstart(c) + uspi->s_sblkno) /* super blk */ 219#define ufs_cgcmin(c) (ufs_cgstart(c) + uspi->s_cblkno) /* cg block */ 220#define ufs_cgimin(c) (ufs_cgstart(c) + uspi->s_iblkno) /* inode blk */ 221#define ufs_cgdmin(c) (ufs_cgstart(c) + uspi->s_dblkno) /* 1st data */ 222 223/* 224 * Macros for handling inode numbers: 225 * inode number to file system block offset. 226 * inode number to cylinder group number. 227 * inode number to file system block address. 228 */ 229#define ufs_inotocg(x) ((x) / uspi->s_ipg) 230#define ufs_inotocgoff(x) ((x) % uspi->s_ipg) 231#define ufs_inotofsba(x) (((u64)ufs_cgimin(ufs_inotocg(x))) + ufs_inotocgoff(x) / uspi->s_inopf) 232#define ufs_inotofsbo(x) ((x) % uspi->s_inopf) 233 234/* 235 * Compute the cylinder and rotational position of a cyl block addr. 236 */ 237#define ufs_cbtocylno(bno) \ 238 ((bno) * uspi->s_nspf / uspi->s_spc) 239#define ufs_cbtorpos(bno) \ 240 ((UFS_SB(sb)->s_flags & UFS_CG_SUN) ? \ 241 (((((bno) * uspi->s_nspf % uspi->s_spc) % \ 242 uspi->s_nsect) * \ 243 uspi->s_nrpos) / uspi->s_nsect) \ 244 : \ 245 ((((bno) * uspi->s_nspf % uspi->s_spc / uspi->s_nsect \ 246 * uspi->s_trackskew + (bno) * uspi->s_nspf % uspi->s_spc \ 247 % uspi->s_nsect * uspi->s_interleave) % uspi->s_nsect \ 248 * uspi->s_nrpos) / uspi->s_npsect)) 249 250/* 251 * The following macros optimize certain frequently calculated 252 * quantities by using shifts and masks in place of divisions 253 * modulos and multiplications. 254 */ 255#define ufs_blkoff(loc) ((loc) & uspi->s_qbmask) 256#define ufs_fragoff(loc) ((loc) & uspi->s_qfmask) 257#define ufs_lblktosize(blk) ((blk) << uspi->s_bshift) 258#define ufs_lblkno(loc) ((loc) >> uspi->s_bshift) 259#define ufs_numfrags(loc) ((loc) >> uspi->s_fshift) 260#define ufs_blkroundup(size) (((size) + uspi->s_qbmask) & uspi->s_bmask) 261#define ufs_fragroundup(size) (((size) + uspi->s_qfmask) & uspi->s_fmask) 262#define ufs_fragstoblks(frags) ((frags) >> uspi->s_fpbshift) 263#define ufs_blkstofrags(blks) ((blks) << uspi->s_fpbshift) 264#define ufs_fragnum(fsb) ((fsb) & uspi->s_fpbmask) 265#define ufs_blknum(fsb) ((fsb) & ~uspi->s_fpbmask) 266 267#define UFS_MAXNAMLEN 255 268#define UFS_MAXMNTLEN 512 269#define UFS2_MAXMNTLEN 468 270#define UFS2_MAXVOLLEN 32 271#define UFS_MAXCSBUFS 31 272#define UFS_LINK_MAX 32000 273/* 274#define UFS2_NOCSPTRS ((128 / sizeof(void *)) - 4) 275*/ 276#define UFS2_NOCSPTRS 28 277 278/* 279 * UFS_DIR_PAD defines the directory entries boundaries 280 * (must be a multiple of 4) 281 */ 282#define UFS_DIR_PAD 4 283#define UFS_DIR_ROUND (UFS_DIR_PAD - 1) 284#define UFS_DIR_REC_LEN(name_len) (((name_len) + 1 + 8 + UFS_DIR_ROUND) & ~UFS_DIR_ROUND) 285 286struct ufs_timeval { 287 __fs32 tv_sec; 288 __fs32 tv_usec; 289}; 290 291struct ufs_dir_entry { 292 __fs32 d_ino; /* inode number of this entry */ 293 __fs16 d_reclen; /* length of this entry */ 294 union { 295 __fs16 d_namlen; /* actual length of d_name */ 296 struct { 297 __u8 d_type; /* file type */ 298 __u8 d_namlen; /* length of string in d_name */ 299 } d_44; 300 } d_u; 301 __u8 d_name[UFS_MAXNAMLEN + 1]; /* file name */ 302}; 303 304struct ufs_csum { 305 __fs32 cs_ndir; /* number of directories */ 306 __fs32 cs_nbfree; /* number of free blocks */ 307 __fs32 cs_nifree; /* number of free inodes */ 308 __fs32 cs_nffree; /* number of free frags */ 309}; 310struct ufs2_csum_total { 311 __fs64 cs_ndir; /* number of directories */ 312 __fs64 cs_nbfree; /* number of free blocks */ 313 __fs64 cs_nifree; /* number of free inodes */ 314 __fs64 cs_nffree; /* number of free frags */ 315 __fs64 cs_numclusters; /* number of free clusters */ 316 __fs64 cs_spare[3]; /* future expansion */ 317}; 318 319struct ufs_csum_core { 320 __u64 cs_ndir; /* number of directories */ 321 __u64 cs_nbfree; /* number of free blocks */ 322 __u64 cs_nifree; /* number of free inodes */ 323 __u64 cs_nffree; /* number of free frags */ 324 __u64 cs_numclusters; /* number of free clusters */ 325}; 326 327/* 328 * File system flags 329 */ 330#define UFS_UNCLEAN 0x01 /* file system not clean at mount (unused) */ 331#define UFS_DOSOFTDEP 0x02 /* file system using soft dependencies */ 332#define UFS_NEEDSFSCK 0x04 /* needs sync fsck (FreeBSD compat, unused) */ 333#define UFS_INDEXDIRS 0x08 /* kernel supports indexed directories */ 334#define UFS_ACLS 0x10 /* file system has ACLs enabled */ 335#define UFS_MULTILABEL 0x20 /* file system is MAC multi-label */ 336#define UFS_FLAGS_UPDATED 0x80 /* flags have been moved to new location */ 337 338#if 0 339/* 340 * This is the actual superblock, as it is laid out on the disk. 341 * Do NOT use this structure, because of sizeof(ufs_super_block) > 512 and 342 * it may occupy several blocks, use 343 * struct ufs_super_block_(first,second,third) instead. 344 */ 345struct ufs_super_block { 346 union { 347 struct { 348 __fs32 fs_link; /* UNUSED */ 349 } fs_42; 350 struct { 351 __fs32 fs_state; /* file system state flag */ 352 } fs_sun; 353 } fs_u0; 354 __fs32 fs_rlink; /* UNUSED */ 355 __fs32 fs_sblkno; /* addr of super-block in filesys */ 356 __fs32 fs_cblkno; /* offset of cyl-block in filesys */ 357 __fs32 fs_iblkno; /* offset of inode-blocks in filesys */ 358 __fs32 fs_dblkno; /* offset of first data after cg */ 359 __fs32 fs_cgoffset; /* cylinder group offset in cylinder */ 360 __fs32 fs_cgmask; /* used to calc mod fs_ntrak */ 361 __fs32 fs_time; /* last time written -- time_t */ 362 __fs32 fs_size; /* number of blocks in fs */ 363 __fs32 fs_dsize; /* number of data blocks in fs */ 364 __fs32 fs_ncg; /* number of cylinder groups */ 365 __fs32 fs_bsize; /* size of basic blocks in fs */ 366 __fs32 fs_fsize; /* size of frag blocks in fs */ 367 __fs32 fs_frag; /* number of frags in a block in fs */ 368/* these are configuration parameters */ 369 __fs32 fs_minfree; /* minimum percentage of free blocks */ 370 __fs32 fs_rotdelay; /* num of ms for optimal next block */ 371 __fs32 fs_rps; /* disk revolutions per second */ 372/* these fields can be computed from the others */ 373 __fs32 fs_bmask; /* ``blkoff'' calc of blk offsets */ 374 __fs32 fs_fmask; /* ``fragoff'' calc of frag offsets */ 375 __fs32 fs_bshift; /* ``lblkno'' calc of logical blkno */ 376 __fs32 fs_fshift; /* ``numfrags'' calc number of frags */ 377/* these are configuration parameters */ 378 __fs32 fs_maxcontig; /* max number of contiguous blks */ 379 __fs32 fs_maxbpg; /* max number of blks per cyl group */ 380/* these fields can be computed from the others */ 381 __fs32 fs_fragshift; /* block to frag shift */ 382 __fs32 fs_fsbtodb; /* fsbtodb and dbtofsb shift constant */ 383 __fs32 fs_sbsize; /* actual size of super block */ 384 __fs32 fs_csmask; /* csum block offset */ 385 __fs32 fs_csshift; /* csum block number */ 386 __fs32 fs_nindir; /* value of NINDIR */ 387 __fs32 fs_inopb; /* value of INOPB */ 388 __fs32 fs_nspf; /* value of NSPF */ 389/* yet another configuration parameter */ 390 __fs32 fs_optim; /* optimization preference, see below */ 391/* these fields are derived from the hardware */ 392 union { 393 struct { 394 __fs32 fs_npsect; /* # sectors/track including spares */ 395 } fs_sun; 396 struct { 397 __fs32 fs_state; /* file system state time stamp */ 398 } fs_sunx86; 399 } fs_u1; 400 __fs32 fs_interleave; /* hardware sector interleave */ 401 __fs32 fs_trackskew; /* sector 0 skew, per track */ 402/* a unique id for this filesystem (currently unused and unmaintained) */ 403/* In 4.3 Tahoe this space is used by fs_headswitch and fs_trkseek */ 404/* Neither of those fields is used in the Tahoe code right now but */ 405/* there could be problems if they are. */ 406 __fs32 fs_id[2]; /* file system id */ 407/* sizes determined by number of cylinder groups and their sizes */ 408 __fs32 fs_csaddr; /* blk addr of cyl grp summary area */ 409 __fs32 fs_cssize; /* size of cyl grp summary area */ 410 __fs32 fs_cgsize; /* cylinder group size */ 411/* these fields are derived from the hardware */ 412 __fs32 fs_ntrak; /* tracks per cylinder */ 413 __fs32 fs_nsect; /* sectors per track */ 414 __fs32 fs_spc; /* sectors per cylinder */ 415/* this comes from the disk driver partitioning */ 416 __fs32 fs_ncyl; /* cylinders in file system */ 417/* these fields can be computed from the others */ 418 __fs32 fs_cpg; /* cylinders per group */ 419 __fs32 fs_ipg; /* inodes per cylinder group */ 420 __fs32 fs_fpg; /* blocks per group * fs_frag */ 421/* this data must be re-computed after crashes */ 422 struct ufs_csum fs_cstotal; /* cylinder summary information */ 423/* these fields are cleared at mount time */ 424 __s8 fs_fmod; /* super block modified flag */ 425 __s8 fs_clean; /* file system is clean flag */ 426 __s8 fs_ronly; /* mounted read-only flag */ 427 __s8 fs_flags; 428 union { 429 struct { 430 __s8 fs_fsmnt[UFS_MAXMNTLEN];/* name mounted on */ 431 __fs32 fs_cgrotor; /* last cg searched */ 432 __fs32 fs_csp[UFS_MAXCSBUFS];/*list of fs_cs info buffers */ 433 __fs32 fs_maxcluster; 434 __fs32 fs_cpc; /* cyl per cycle in postbl */ 435 __fs16 fs_opostbl[16][8]; /* old rotation block list head */ 436 } fs_u1; 437 struct { 438 __s8 fs_fsmnt[UFS2_MAXMNTLEN]; /* name mounted on */ 439 __u8 fs_volname[UFS2_MAXVOLLEN]; /* volume name */ 440 __fs64 fs_swuid; /* system-wide uid */ 441 __fs32 fs_pad; /* due to alignment of fs_swuid */ 442 __fs32 fs_cgrotor; /* last cg searched */ 443 __fs32 fs_ocsp[UFS2_NOCSPTRS]; /*list of fs_cs info buffers */ 444 __fs32 fs_contigdirs;/*# of contiguously allocated dirs */ 445 __fs32 fs_csp; /* cg summary info buffer for fs_cs */ 446 __fs32 fs_maxcluster; 447 __fs32 fs_active;/* used by snapshots to track fs */ 448 __fs32 fs_old_cpc; /* cyl per cycle in postbl */ 449 __fs32 fs_maxbsize;/*maximum blocking factor permitted */ 450 __fs64 fs_sparecon64[17];/*old rotation block list head */ 451 __fs64 fs_sblockloc; /* byte offset of standard superblock */ 452 struct ufs2_csum_total fs_cstotal;/*cylinder summary information*/ 453 struct ufs_timeval fs_time; /* last time written */ 454 __fs64 fs_size; /* number of blocks in fs */ 455 __fs64 fs_dsize; /* number of data blocks in fs */ 456 __fs64 fs_csaddr; /* blk addr of cyl grp summary area */ 457 __fs64 fs_pendingblocks;/* blocks in process of being freed */ 458 __fs32 fs_pendinginodes;/*inodes in process of being freed */ 459 } fs_u2; 460 } fs_u11; 461 union { 462 struct { 463 __fs32 fs_sparecon[53];/* reserved for future constants */ 464 __fs32 fs_reclaim; 465 __fs32 fs_sparecon2[1]; 466 __fs32 fs_state; /* file system state time stamp */ 467 __fs32 fs_qbmask[2]; /* ~usb_bmask */ 468 __fs32 fs_qfmask[2]; /* ~usb_fmask */ 469 } fs_sun; 470 struct { 471 __fs32 fs_sparecon[53];/* reserved for future constants */ 472 __fs32 fs_reclaim; 473 __fs32 fs_sparecon2[1]; 474 __fs32 fs_npsect; /* # sectors/track including spares */ 475 __fs32 fs_qbmask[2]; /* ~usb_bmask */ 476 __fs32 fs_qfmask[2]; /* ~usb_fmask */ 477 } fs_sunx86; 478 struct { 479 __fs32 fs_sparecon[50];/* reserved for future constants */ 480 __fs32 fs_contigsumsize;/* size of cluster summary array */ 481 __fs32 fs_maxsymlinklen;/* max length of an internal symlink */ 482 __fs32 fs_inodefmt; /* format of on-disk inodes */ 483 __fs32 fs_maxfilesize[2]; /* max representable file size */ 484 __fs32 fs_qbmask[2]; /* ~usb_bmask */ 485 __fs32 fs_qfmask[2]; /* ~usb_fmask */ 486 __fs32 fs_state; /* file system state time stamp */ 487 } fs_44; 488 } fs_u2; 489 __fs32 fs_postblformat; /* format of positional layout tables */ 490 __fs32 fs_nrpos; /* number of rotational positions */ 491 __fs32 fs_postbloff; /* (__s16) rotation block list head */ 492 __fs32 fs_rotbloff; /* (__u8) blocks for each rotation */ 493 __fs32 fs_magic; /* magic number */ 494 __u8 fs_space[1]; /* list of blocks for each rotation */ 495}; 496#endif/*struct ufs_super_block*/ 497 498/* 499 * Preference for optimization. 500 */ 501#define UFS_OPTTIME 0 /* minimize allocation time */ 502#define UFS_OPTSPACE 1 /* minimize disk fragmentation */ 503 504/* 505 * Rotational layout table format types 506 */ 507#define UFS_42POSTBLFMT -1 /* 4.2BSD rotational table format */ 508#define UFS_DYNAMICPOSTBLFMT 1 /* dynamic rotational table format */ 509 510/* 511 * Convert cylinder group to base address of its global summary info. 512 */ 513#define fs_cs(indx) s_csp[(indx)] 514 515/* 516 * Cylinder group block for a file system. 517 * 518 * Writable fields in the cylinder group are protected by the associated 519 * super block lock fs->fs_lock. 520 */ 521#define CG_MAGIC 0x090255 522#define ufs_cg_chkmagic(sb, ucg) \ 523 (fs32_to_cpu((sb), (ucg)->cg_magic) == CG_MAGIC) 524/* 525 * Macros for access to old cylinder group array structures 526 */ 527#define ufs_ocg_blktot(sb, ucg) fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_btot) 528#define ufs_ocg_blks(sb, ucg, cylno) fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_b[cylno]) 529#define ufs_ocg_inosused(sb, ucg) fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_iused) 530#define ufs_ocg_blksfree(sb, ucg) fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_free) 531#define ufs_ocg_chkmagic(sb, ucg) \ 532 (fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_magic) == CG_MAGIC) 533 534/* 535 * size of this structure is 172 B 536 */ 537struct ufs_cylinder_group { 538 __fs32 cg_link; /* linked list of cyl groups */ 539 __fs32 cg_magic; /* magic number */ 540 __fs32 cg_time; /* time last written */ 541 __fs32 cg_cgx; /* we are the cgx'th cylinder group */ 542 __fs16 cg_ncyl; /* number of cyl's this cg */ 543 __fs16 cg_niblk; /* number of inode blocks this cg */ 544 __fs32 cg_ndblk; /* number of data blocks this cg */ 545 struct ufs_csum cg_cs; /* cylinder summary information */ 546 __fs32 cg_rotor; /* position of last used block */ 547 __fs32 cg_frotor; /* position of last used frag */ 548 __fs32 cg_irotor; /* position of last used inode */ 549 __fs32 cg_frsum[UFS_MAXFRAG]; /* counts of available frags */ 550 __fs32 cg_btotoff; /* (__u32) block totals per cylinder */ 551 __fs32 cg_boff; /* (short) free block positions */ 552 __fs32 cg_iusedoff; /* (char) used inode map */ 553 __fs32 cg_freeoff; /* (u_char) free block map */ 554 __fs32 cg_nextfreeoff; /* (u_char) next available space */ 555 union { 556 struct { 557 __fs32 cg_clustersumoff; /* (u_int32) counts of avail clusters */ 558 __fs32 cg_clusteroff; /* (u_int8) free cluster map */ 559 __fs32 cg_nclusterblks; /* number of clusters this cg */ 560 __fs32 cg_sparecon[13]; /* reserved for future use */ 561 } cg_44; 562 struct { 563 __fs32 cg_clustersumoff;/* (u_int32) counts of avail clusters */ 564 __fs32 cg_clusteroff; /* (u_int8) free cluster map */ 565 __fs32 cg_nclusterblks;/* number of clusters this cg */ 566 __fs32 cg_niblk; /* number of inode blocks this cg */ 567 __fs32 cg_initediblk; /* last initialized inode */ 568 __fs32 cg_sparecon32[3];/* reserved for future use */ 569 __fs64 cg_time; /* time last written */ 570 __fs64 cg_sparecon[3]; /* reserved for future use */ 571 } cg_u2; 572 __fs32 cg_sparecon[16]; /* reserved for future use */ 573 } cg_u; 574 __u8 cg_space[1]; /* space for cylinder group maps */ 575/* actually longer */ 576}; 577 578/* Historic Cylinder group info */ 579struct ufs_old_cylinder_group { 580 __fs32 cg_link; /* linked list of cyl groups */ 581 __fs32 cg_rlink; /* for incore cyl groups */ 582 __fs32 cg_time; /* time last written */ 583 __fs32 cg_cgx; /* we are the cgx'th cylinder group */ 584 __fs16 cg_ncyl; /* number of cyl's this cg */ 585 __fs16 cg_niblk; /* number of inode blocks this cg */ 586 __fs32 cg_ndblk; /* number of data blocks this cg */ 587 struct ufs_csum cg_cs; /* cylinder summary information */ 588 __fs32 cg_rotor; /* position of last used block */ 589 __fs32 cg_frotor; /* position of last used frag */ 590 __fs32 cg_irotor; /* position of last used inode */ 591 __fs32 cg_frsum[8]; /* counts of available frags */ 592 __fs32 cg_btot[32]; /* block totals per cylinder */ 593 __fs16 cg_b[32][8]; /* positions of free blocks */ 594 __u8 cg_iused[256]; /* used inode map */ 595 __fs32 cg_magic; /* magic number */ 596 __u8 cg_free[1]; /* free block map */ 597/* actually longer */ 598}; 599 600/* 601 * structure of an on-disk inode 602 */ 603struct ufs_inode { 604 __fs16 ui_mode; /* 0x0 */ 605 __fs16 ui_nlink; /* 0x2 */ 606 union { 607 struct { 608 __fs16 ui_suid; /* 0x4 */ 609 __fs16 ui_sgid; /* 0x6 */ 610 } oldids; 611 __fs32 ui_inumber; /* 0x4 lsf: inode number */ 612 __fs32 ui_author; /* 0x4 GNU HURD: author */ 613 } ui_u1; 614 __fs64 ui_size; /* 0x8 */ 615 struct ufs_timeval ui_atime; /* 0x10 access */ 616 struct ufs_timeval ui_mtime; /* 0x18 modification */ 617 struct ufs_timeval ui_ctime; /* 0x20 creation */ 618 union { 619 struct { 620 __fs32 ui_db[UFS_NDADDR];/* 0x28 data blocks */ 621 __fs32 ui_ib[UFS_NINDIR];/* 0x58 indirect blocks */ 622 } ui_addr; 623 __u8 ui_symlink[4*(UFS_NDADDR+UFS_NINDIR)];/* 0x28 fast symlink */ 624 } ui_u2; 625 __fs32 ui_flags; /* 0x64 immutable, append-only... */ 626 __fs32 ui_blocks; /* 0x68 blocks in use */ 627 __fs32 ui_gen; /* 0x6c like ext2 i_version, for NFS support */ 628 union { 629 struct { 630 __fs32 ui_shadow; /* 0x70 shadow inode with security data */ 631 __fs32 ui_uid; /* 0x74 long EFT version of uid */ 632 __fs32 ui_gid; /* 0x78 long EFT version of gid */ 633 __fs32 ui_oeftflag; /* 0x7c reserved */ 634 } ui_sun; 635 struct { 636 __fs32 ui_uid; /* 0x70 File owner */ 637 __fs32 ui_gid; /* 0x74 File group */ 638 __fs32 ui_spare[2]; /* 0x78 reserved */ 639 } ui_44; 640 struct { 641 __fs32 ui_uid; /* 0x70 */ 642 __fs32 ui_gid; /* 0x74 */ 643 __fs16 ui_modeh; /* 0x78 mode high bits */ 644 __fs16 ui_spare; /* 0x7A unused */ 645 __fs32 ui_trans; /* 0x7c filesystem translator */ 646 } ui_hurd; 647 } ui_u3; 648}; 649 650#define UFS_NXADDR 2 /* External addresses in inode. */ 651struct ufs2_inode { 652 __fs16 ui_mode; /* 0: IFMT, permissions; see below. */ 653 __fs16 ui_nlink; /* 2: File link count. */ 654 __fs32 ui_uid; /* 4: File owner. */ 655 __fs32 ui_gid; /* 8: File group. */ 656 __fs32 ui_blksize; /* 12: Inode blocksize. */ 657 __fs64 ui_size; /* 16: File byte count. */ 658 __fs64 ui_blocks; /* 24: Bytes actually held. */ 659 __fs64 ui_atime; /* 32: Last access time. */ 660 __fs64 ui_mtime; /* 40: Last modified time. */ 661 __fs64 ui_ctime; /* 48: Last inode change time. */ 662 __fs64 ui_birthtime; /* 56: Inode creation time. */ 663 __fs32 ui_mtimensec; /* 64: Last modified time. */ 664 __fs32 ui_atimensec; /* 68: Last access time. */ 665 __fs32 ui_ctimensec; /* 72: Last inode change time. */ 666 __fs32 ui_birthnsec; /* 76: Inode creation time. */ 667 __fs32 ui_gen; /* 80: Generation number. */ 668 __fs32 ui_kernflags; /* 84: Kernel flags. */ 669 __fs32 ui_flags; /* 88: Status flags (chflags). */ 670 __fs32 ui_extsize; /* 92: External attributes block. */ 671 __fs64 ui_extb[UFS_NXADDR];/* 96: External attributes block. */ 672 union { 673 struct { 674 __fs64 ui_db[UFS_NDADDR]; /* 112: Direct disk blocks. */ 675 __fs64 ui_ib[UFS_NINDIR];/* 208: Indirect disk blocks.*/ 676 } ui_addr; 677 __u8 ui_symlink[2*4*(UFS_NDADDR+UFS_NINDIR)];/* 0x28 fast symlink */ 678 } ui_u2; 679 __fs64 ui_spare[3]; /* 232: Reserved; currently unused */ 680}; 681 682 683/* FreeBSD has these in sys/stat.h */ 684/* ui_flags that can be set by a file owner */ 685#define UFS_UF_SETTABLE 0x0000ffff 686#define UFS_UF_NODUMP 0x00000001 /* do not dump */ 687#define UFS_UF_IMMUTABLE 0x00000002 /* immutable (can't "change") */ 688#define UFS_UF_APPEND 0x00000004 /* append-only */ 689#define UFS_UF_OPAQUE 0x00000008 /* directory is opaque (unionfs) */ 690#define UFS_UF_NOUNLINK 0x00000010 /* can't be removed or renamed */ 691/* ui_flags that only root can set */ 692#define UFS_SF_SETTABLE 0xffff0000 693#define UFS_SF_ARCHIVED 0x00010000 /* archived */ 694#define UFS_SF_IMMUTABLE 0x00020000 /* immutable (can't "change") */ 695#define UFS_SF_APPEND 0x00040000 /* append-only */ 696#define UFS_SF_NOUNLINK 0x00100000 /* can't be removed or renamed */ 697 698/* 699 * This structure is used for reading disk structures larger 700 * than the size of fragment. 701 */ 702struct ufs_buffer_head { 703 __u64 fragment; /* first fragment */ 704 __u64 count; /* number of fragments */ 705 struct buffer_head * bh[UFS_MAXFRAG]; /* buffers */ 706}; 707 708struct ufs_cg_private_info { 709 struct ufs_buffer_head c_ubh; 710 __u32 c_cgx; /* number of cylidner group */ 711 __u16 c_ncyl; /* number of cyl's this cg */ 712 __u16 c_niblk; /* number of inode blocks this cg */ 713 __u32 c_ndblk; /* number of data blocks this cg */ 714 __u32 c_rotor; /* position of last used block */ 715 __u32 c_frotor; /* position of last used frag */ 716 __u32 c_irotor; /* position of last used inode */ 717 __u32 c_btotoff; /* (__u32) block totals per cylinder */ 718 __u32 c_boff; /* (short) free block positions */ 719 __u32 c_iusedoff; /* (char) used inode map */ 720 __u32 c_freeoff; /* (u_char) free block map */ 721 __u32 c_nextfreeoff; /* (u_char) next available space */ 722 __u32 c_clustersumoff;/* (u_int32) counts of avail clusters */ 723 __u32 c_clusteroff; /* (u_int8) free cluster map */ 724 __u32 c_nclusterblks; /* number of clusters this cg */ 725}; 726 727 728struct ufs_sb_private_info { 729 struct ufs_buffer_head s_ubh; /* buffer containing super block */ 730 struct ufs_csum_core cs_total; 731 __u32 s_sblkno; /* offset of super-blocks in filesys */ 732 __u32 s_cblkno; /* offset of cg-block in filesys */ 733 __u32 s_iblkno; /* offset of inode-blocks in filesys */ 734 __u32 s_dblkno; /* offset of first data after cg */ 735 __u32 s_cgoffset; /* cylinder group offset in cylinder */ 736 __u32 s_cgmask; /* used to calc mod fs_ntrak */ 737 __u64 s_size; /* number of blocks (fragments) in fs */ 738 __u64 s_dsize; /* 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 __u64 s_root_blocks; 796 __u64 s_time_to_space; 797 __u64 s_space_to_time; 798}; 799 800/* 801 * Sizes of this structures are: 802 * ufs_super_block_first 512 803 * ufs_super_block_second 512 804 * ufs_super_block_third 356 805 */ 806struct ufs_super_block_first { 807 union { 808 struct { 809 __fs32 fs_link; /* UNUSED */ 810 } fs_42; 811 struct { 812 __fs32 fs_state; /* file system state flag */ 813 } fs_sun; 814 } fs_u0; 815 __fs32 fs_rlink; 816 __fs32 fs_sblkno; 817 __fs32 fs_cblkno; 818 __fs32 fs_iblkno; 819 __fs32 fs_dblkno; 820 __fs32 fs_cgoffset; 821 __fs32 fs_cgmask; 822 __fs32 fs_time; 823 __fs32 fs_size; 824 __fs32 fs_dsize; 825 __fs32 fs_ncg; 826 __fs32 fs_bsize; 827 __fs32 fs_fsize; 828 __fs32 fs_frag; 829 __fs32 fs_minfree; 830 __fs32 fs_rotdelay; 831 __fs32 fs_rps; 832 __fs32 fs_bmask; 833 __fs32 fs_fmask; 834 __fs32 fs_bshift; 835 __fs32 fs_fshift; 836 __fs32 fs_maxcontig; 837 __fs32 fs_maxbpg; 838 __fs32 fs_fragshift; 839 __fs32 fs_fsbtodb; 840 __fs32 fs_sbsize; 841 __fs32 fs_csmask; 842 __fs32 fs_csshift; 843 __fs32 fs_nindir; 844 __fs32 fs_inopb; 845 __fs32 fs_nspf; 846 __fs32 fs_optim; 847 union { 848 struct { 849 __fs32 fs_npsect; 850 } fs_sun; 851 struct { 852 __fs32 fs_state; 853 } fs_sunx86; 854 } fs_u1; 855 __fs32 fs_interleave; 856 __fs32 fs_trackskew; 857 __fs32 fs_id[2]; 858 __fs32 fs_csaddr; 859 __fs32 fs_cssize; 860 __fs32 fs_cgsize; 861 __fs32 fs_ntrak; 862 __fs32 fs_nsect; 863 __fs32 fs_spc; 864 __fs32 fs_ncyl; 865 __fs32 fs_cpg; 866 __fs32 fs_ipg; 867 __fs32 fs_fpg; 868 struct ufs_csum fs_cstotal; 869 __s8 fs_fmod; 870 __s8 fs_clean; 871 __s8 fs_ronly; 872 __s8 fs_flags; 873 __s8 fs_fsmnt[UFS_MAXMNTLEN - 212]; 874 875}; 876 877struct ufs_super_block_second { 878 union { 879 struct { 880 __s8 fs_fsmnt[212]; 881 __fs32 fs_cgrotor; 882 __fs32 fs_csp[UFS_MAXCSBUFS]; 883 __fs32 fs_maxcluster; 884 __fs32 fs_cpc; 885 __fs16 fs_opostbl[82]; 886 } fs_u1; 887 struct { 888 __s8 fs_fsmnt[UFS2_MAXMNTLEN - UFS_MAXMNTLEN + 212]; 889 __u8 fs_volname[UFS2_MAXVOLLEN]; 890 __fs64 fs_swuid; 891 __fs32 fs_pad; 892 __fs32 fs_cgrotor; 893 __fs32 fs_ocsp[UFS2_NOCSPTRS]; 894 __fs32 fs_contigdirs; 895 __fs32 fs_csp; 896 __fs32 fs_maxcluster; 897 __fs32 fs_active; 898 __fs32 fs_old_cpc; 899 __fs32 fs_maxbsize; 900 __fs64 fs_sparecon64[17]; 901 __fs64 fs_sblockloc; 902 __fs64 cs_ndir; 903 __fs64 cs_nbfree; 904 } fs_u2; 905 } fs_un; 906}; 907 908struct ufs_super_block_third { 909 union { 910 struct { 911 __fs16 fs_opostbl[46]; 912 } fs_u1; 913 struct { 914 __fs64 cs_nifree; /* number of free inodes */ 915 __fs64 cs_nffree; /* number of free frags */ 916 __fs64 cs_numclusters; /* number of free clusters */ 917 __fs64 cs_spare[3]; /* future expansion */ 918 struct ufs_timeval fs_time; /* last time written */ 919 __fs64 fs_size; /* number of blocks in fs */ 920 __fs64 fs_dsize; /* number of data blocks in fs */ 921 __fs64 fs_csaddr; /* blk addr of cyl grp summary area */ 922 __fs64 fs_pendingblocks;/* blocks in process of being freed */ 923 __fs32 fs_pendinginodes;/*inodes in process of being freed */ 924 } __attribute__ ((packed)) fs_u2; 925 } fs_un1; 926 union { 927 struct { 928 __fs32 fs_sparecon[53];/* reserved for future constants */ 929 __fs32 fs_reclaim; 930 __fs32 fs_sparecon2[1]; 931 __fs32 fs_state; /* file system state time stamp */ 932 __fs32 fs_qbmask[2]; /* ~usb_bmask */ 933 __fs32 fs_qfmask[2]; /* ~usb_fmask */ 934 } fs_sun; 935 struct { 936 __fs32 fs_sparecon[53];/* reserved for future constants */ 937 __fs32 fs_reclaim; 938 __fs32 fs_sparecon2[1]; 939 __fs32 fs_npsect; /* # sectors/track including spares */ 940 __fs32 fs_qbmask[2]; /* ~usb_bmask */ 941 __fs32 fs_qfmask[2]; /* ~usb_fmask */ 942 } fs_sunx86; 943 struct { 944 __fs32 fs_sparecon[50];/* reserved for future constants */ 945 __fs32 fs_contigsumsize;/* size of cluster summary array */ 946 __fs32 fs_maxsymlinklen;/* max length of an internal symlink */ 947 __fs32 fs_inodefmt; /* format of on-disk inodes */ 948 __fs32 fs_maxfilesize[2]; /* max representable file size */ 949 __fs32 fs_qbmask[2]; /* ~usb_bmask */ 950 __fs32 fs_qfmask[2]; /* ~usb_fmask */ 951 __fs32 fs_state; /* file system state time stamp */ 952 } fs_44; 953 } fs_un2; 954 __fs32 fs_postblformat; 955 __fs32 fs_nrpos; 956 __fs32 fs_postbloff; 957 __fs32 fs_rotbloff; 958 __fs32 fs_magic; 959 __u8 fs_space[1]; 960}; 961 962#endif /* __LINUX_UFS_FS_H */ 963