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1/* SPDX-License-Identifier: GPL-2.0 */2/*3 * linux/include/linux/ufs_fs.h4 *5 * Copyright (C) 19966 * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)7 * Laboratory for Computer Science Research Computing Facility8 * Rutgers, The State University of New Jersey9 *10 * Clean swab support by Fare <fare@tunes.org>11 * just hope no one is using NNUUXXI on __?64 structure elements12 * 64-bit clean thanks to Maciej W. Rozycki <macro@ds2.pg.gda.pl>13 *14 * 4.4BSD (FreeBSD) support added on February 1st 1998 by15 * Niels Kristian Bech Jensen <nkbj@image.dk> partially based16 * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.17 *18 * NeXTstep support added on February 5th 1998 by19 * 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 by24 * Martin K. Petersen <mkp@mkp.net>, August 199925 *26 * UFS2 (of FreeBSD 5.x) support added by27 * Niraj Kumar <niraj17@iitbombay.org> , Jan 200428 *29 */30 31#ifndef __LINUX_UFS_FS_H32#define __LINUX_UFS_FS_H33 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 046#define UFS_BBSIZE 819247#define UFS_SBLOCK 819248#define UFS_SBSIZE 819249 50#define UFS_SECTOR_SIZE 51251#define UFS_SECTOR_BITS 952#define UFS_MAGIC 0x0001195453#define UFS_MAGIC_BW 0x0f24269754#define UFS2_MAGIC 0x1954011955#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 turn64 * describes the cylinder groups. The super-block is critical65 * data and is replicated in each cylinder group to protect against66 * catastrophic loss. This is done at `newfs' time and the critical67 * super-block data does not change, so the copies need not be68 * referenced further unless disaster strikes.69 *70 * For filesystem fs, the offsets of the various blocks of interest71 * are given in the super block as:72 * [fs->fs_sblkno] Super-block73 * [fs->fs_cblkno] Cylinder group block74 * [fs->fs_iblkno] Inode blocks75 * [fs->fs_dblkno] Data blocks76 * The beginning of cylinder group cg in fs, is given by77 * the ``cgbase(fs, cg)'' macro.78 *79 * Depending on the architecture and the media, the superblock may80 * reside in any one of four places. For tiny media where every block81 * 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 and83 * a small bootstrap. For UFS2 it got moved to 64K from the front to leave84 * room for the disk label and a bigger bootstrap, and for really piggy85 * systems we check at 256K from the front if the first three fail. In86 * all cases the size of the superblock will be SBLOCKSIZE. All values are87 * given in byte-offset form, so they do not imply a sector size. The88 * SBLOCKSEARCH specifies the order in which the locations should be searched.89 */90#define SBLOCK_FLOPPY 091#define SBLOCK_UFS1 819292#define SBLOCK_UFS2 6553693#define SBLOCK_PIGGY 26214494#define SBLOCKSIZE 819295#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 0x95216100106 107#define UFS_MAGIC_FEA 0x00195612 /* fs_featurebits supported */108#define UFS_CIGAM_FEA 0x12561900109 110#define UFS_MAGIC_4GB 0x05231994 /* fs > 4 GB && fs_featurebits */111#define UFS_CIGAM_4GB 0x94192305112 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 8192123#define UFS_MINBSIZE 4096124#define UFS_FSIZE 1024125#define UFS_MAXFRAG (UFS_BSIZE / UFS_FSIZE)126 127#define UFS_NDADDR 12128#define UFS_NINDIR 3129 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 2140#define UFS_FIRST_INO (UFS_ROOTINO + 1)141 142#define UFS_USEEFT ((__u16)65535)143 144/* fs_clean values */145#define UFS_FSOK 0x7c269d38146#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 0x00000000161#define UFS_DE_44BSD 0x00000010162/* uid encoding */163#define UFS_UID_MASK 0x00000060 /* mask for the following */164#define UFS_UID_OLD 0x00000000165#define UFS_UID_44BSD 0x00000020166#define UFS_UID_EFT 0x00000040167/* superblock state encoding */168#define UFS_ST_MASK 0x00000700 /* mask for the following */169#define UFS_ST_OLD 0x00000000170#define UFS_ST_44BSD 0x00000100171#define UFS_ST_SUN 0x00000200 /* Solaris */172#define UFS_ST_SUNOS 0x00000300173#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 0x00000000177#define UFS_CG_44BSD 0x00002000178#define UFS_CG_SUN 0x00001000179/* filesystem type encoding */180#define UFS_TYPE_MASK 0x00010000 /* mask for the following */181#define UFS_TYPE_UFS1 0x00000000182#define UFS_TYPE_UFS2 0x00010000183 184 185/* fs_inodefmt options */186#define UFS_42INODEFMT -1187#define UFS_44INODEFMT 2188 189/*190 * MINFREE gives the minimum acceptable percentage of file system191 * blocks which may be free. If the freelist drops below this level192 * only the superuser may continue to allocate blocks. This may193 * be set to 0 if no reserve of free blocks is deemed necessary,194 * however throughput drops by fifty percent if the file system195 * is run at between 95% and 100% full; thus the minimum default196 * value of fs_minfree is 5%. However, to get good clustering197 * performance, 10% is a better choice. hence we use 10% as our198 * default value. With 10% free space, fragmentation is not a199 * problem, so we choose to optimize for time.200 */201#define UFS_MINFREE 5202#define UFS_DEFAULTOPT UFS_OPTTIME203 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 calculated252 * quantities by using shifts and masks in place of divisions253 * 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 255268#define UFS_MAXMNTLEN 512269#define UFS2_MAXMNTLEN 468270#define UFS2_MAXVOLLEN 32271#define UFS_MAXCSBUFS 31272#define UFS_LINK_MAX 32000273/*274#define UFS2_NOCSPTRS ((128 / sizeof(void *)) - 4)275*/276#define UFS2_NOCSPTRS 28277 278/*279 * UFS_DIR_PAD defines the directory entries boundaries280 * (must be a multiple of 4)281 */282#define UFS_DIR_PAD 4283#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 flags329 */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 0339/*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 and342 * it may occupy several blocks, use343 * 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 types506 */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 associated519 * super block lock fs->fs_lock.520 */521#define CG_MAGIC 0x090255522#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 structures526 */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 B536 */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 inode602 */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 0x0000ffff686#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 0xffff0000693#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 larger700 * 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 512803 * ufs_super_block_second 512804 * ufs_super_block_third 356805 */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