linux/fs/ufs/ufs_fs.h
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   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#include <linux/workqueue.h>
  38
  39#include <asm/div64.h>
  40typedef __u64 __bitwise __fs64;
  41typedef __u32 __bitwise __fs32;
  42typedef __u16 __bitwise __fs16;
  43
  44#define UFS_BBLOCK 0
  45#define UFS_BBSIZE 8192
  46#define UFS_SBLOCK 8192
  47#define UFS_SBSIZE 8192
  48
  49#define UFS_SECTOR_SIZE 512
  50#define UFS_SECTOR_BITS 9
  51#define UFS_MAGIC  0x00011954
  52#define UFS_MAGIC_BW 0x0f242697
  53#define UFS2_MAGIC 0x19540119
  54#define UFS_CIGAM  0x54190100 /* byteswapped MAGIC */
  55
  56/* Copied from FreeBSD */
  57/*
  58 * Each disk drive contains some number of filesystems.
  59 * A filesystem consists of a number of cylinder groups.
  60 * Each cylinder group has inodes and data.
  61 *
  62 * A filesystem is described by its super-block, which in turn
  63 * describes the cylinder groups.  The super-block is critical
  64 * data and is replicated in each cylinder group to protect against
  65 * catastrophic loss.  This is done at `newfs' time and the critical
  66 * super-block data does not change, so the copies need not be
  67 * referenced further unless disaster strikes.
  68 *
  69 * For filesystem fs, the offsets of the various blocks of interest
  70 * are given in the super block as:
  71 *      [fs->fs_sblkno]         Super-block
  72 *      [fs->fs_cblkno]         Cylinder group block
  73 *      [fs->fs_iblkno]         Inode blocks
  74 *      [fs->fs_dblkno]         Data blocks
  75 * The beginning of cylinder group cg in fs, is given by
  76 * the ``cgbase(fs, cg)'' macro.
  77 *
  78 * Depending on the architecture and the media, the superblock may
  79 * reside in any one of four places. For tiny media where every block
  80 * counts, it is placed at the very front of the partition. Historically,
  81 * UFS1 placed it 8K from the front to leave room for the disk label and
  82 * a small bootstrap. For UFS2 it got moved to 64K from the front to leave
  83 * room for the disk label and a bigger bootstrap, and for really piggy
  84 * systems we check at 256K from the front if the first three fail. In
  85 * all cases the size of the superblock will be SBLOCKSIZE. All values are
  86 * given in byte-offset form, so they do not imply a sector size. The
  87 * SBLOCKSEARCH specifies the order in which the locations should be searched.
  88 */
  89#define SBLOCK_FLOPPY        0
  90#define SBLOCK_UFS1       8192
  91#define SBLOCK_UFS2      65536
  92#define SBLOCK_PIGGY    262144
  93#define SBLOCKSIZE        8192
  94#define SBLOCKSEARCH \
  95        { SBLOCK_UFS2, SBLOCK_UFS1, SBLOCK_FLOPPY, SBLOCK_PIGGY, -1 }
  96
  97
  98/* HP specific MAGIC values */
  99
 100#define UFS_MAGIC_LFN   0x00095014 /* fs supports filenames > 14 chars */
 101#define UFS_CIGAM_LFN   0x14500900 /* srahc 41 < semanelif stroppus sf */
 102
 103#define UFS_MAGIC_SEC   0x00612195 /* B1 security fs */
 104#define UFS_CIGAM_SEC   0x95216100
 105
 106#define UFS_MAGIC_FEA   0x00195612 /* fs_featurebits supported */
 107#define UFS_CIGAM_FEA   0x12561900
 108
 109#define UFS_MAGIC_4GB   0x05231994 /* fs > 4 GB && fs_featurebits */
 110#define UFS_CIGAM_4GB   0x94192305
 111
 112/* Seems somebody at HP goofed here. B1 and lfs are both 0x2 !?! */
 113#define UFS_FSF_LFN     0x00000001 /* long file names */
 114#define UFS_FSF_B1      0x00000002 /* B1 security */
 115#define UFS_FSF_LFS     0x00000002 /* large files */
 116#define UFS_FSF_LUID    0x00000004 /* large UIDs */
 117
 118/* End of HP stuff */
 119
 120
 121#define UFS_BSIZE       8192
 122#define UFS_MINBSIZE    4096
 123#define UFS_FSIZE       1024
 124#define UFS_MAXFRAG     (UFS_BSIZE / UFS_FSIZE)
 125
 126#define UFS_NDADDR 12
 127#define UFS_NINDIR 3
 128
 129#define UFS_IND_BLOCK   (UFS_NDADDR + 0)
 130#define UFS_DIND_BLOCK  (UFS_NDADDR + 1)
 131#define UFS_TIND_BLOCK  (UFS_NDADDR + 2)
 132
 133#define UFS_NDIR_FRAGMENT (UFS_NDADDR << uspi->s_fpbshift)
 134#define UFS_IND_FRAGMENT (UFS_IND_BLOCK << uspi->s_fpbshift)
 135#define UFS_DIND_FRAGMENT (UFS_DIND_BLOCK << uspi->s_fpbshift)
 136#define UFS_TIND_FRAGMENT (UFS_TIND_BLOCK << uspi->s_fpbshift)
 137
 138#define UFS_ROOTINO 2
 139#define UFS_FIRST_INO (UFS_ROOTINO + 1)
 140
 141#define UFS_USEEFT  ((__u16)65535)
 142
 143/* fs_clean values */
 144#define UFS_FSOK      0x7c269d38
 145#define UFS_FSACTIVE  ((__s8)0x00)
 146#define UFS_FSCLEAN   ((__s8)0x01)
 147#define UFS_FSSTABLE  ((__s8)0x02)
 148#define UFS_FSOSF1    ((__s8)0x03)      /* is this correct for DEC OSF/1? */
 149#define UFS_FSBAD     ((__s8)0xff)
 150
 151/* Solaris-specific fs_clean values */
 152#define UFS_FSSUSPEND ((__s8)0xfe)      /* temporarily suspended */
 153#define UFS_FSLOG     ((__s8)0xfd)      /* logging fs */
 154#define UFS_FSFIX     ((__s8)0xfc)      /* being repaired while mounted */
 155
 156/* From here to next blank line, s_flags for ufs_sb_info */
 157/* directory entry encoding */
 158#define UFS_DE_MASK             0x00000010      /* mask for the following */
 159#define UFS_DE_OLD              0x00000000
 160#define UFS_DE_44BSD            0x00000010
 161/* uid encoding */
 162#define UFS_UID_MASK            0x00000060      /* mask for the following */
 163#define UFS_UID_OLD             0x00000000
 164#define UFS_UID_44BSD           0x00000020
 165#define UFS_UID_EFT             0x00000040
 166/* superblock state encoding */
 167#define UFS_ST_MASK             0x00000700      /* mask for the following */
 168#define UFS_ST_OLD              0x00000000
 169#define UFS_ST_44BSD            0x00000100
 170#define UFS_ST_SUN              0x00000200 /* Solaris */
 171#define UFS_ST_SUNOS            0x00000300
 172#define UFS_ST_SUNx86           0x00000400 /* Solaris x86 */
 173/*cylinder group encoding */
 174#define UFS_CG_MASK             0x00003000      /* mask for the following */
 175#define UFS_CG_OLD              0x00000000
 176#define UFS_CG_44BSD            0x00002000
 177#define UFS_CG_SUN              0x00001000
 178/* filesystem type encoding */
 179#define UFS_TYPE_MASK           0x00010000      /* mask for the following */
 180#define UFS_TYPE_UFS1           0x00000000
 181#define UFS_TYPE_UFS2           0x00010000
 182
 183
 184/* fs_inodefmt options */
 185#define UFS_42INODEFMT  -1
 186#define UFS_44INODEFMT  2
 187
 188/*
 189 * MINFREE gives the minimum acceptable percentage of file system
 190 * blocks which may be free. If the freelist drops below this level
 191 * only the superuser may continue to allocate blocks. This may
 192 * be set to 0 if no reserve of free blocks is deemed necessary,
 193 * however throughput drops by fifty percent if the file system
 194 * is run at between 95% and 100% full; thus the minimum default
 195 * value of fs_minfree is 5%. However, to get good clustering
 196 * performance, 10% is a better choice. hence we use 10% as our
 197 * default value. With 10% free space, fragmentation is not a
 198 * problem, so we choose to optimize for time.
 199 */
 200#define UFS_MINFREE         5
 201#define UFS_DEFAULTOPT      UFS_OPTTIME
 202
 203/*
 204 * Turn file system block numbers into disk block addresses.
 205 * This maps file system blocks to device size blocks.
 206 */
 207#define ufs_fsbtodb(uspi, b)    ((b) << (uspi)->s_fsbtodb)
 208#define ufs_dbtofsb(uspi, b)    ((b) >> (uspi)->s_fsbtodb)
 209
 210/*
 211 * Cylinder group macros to locate things in cylinder groups.
 212 * They calc file system addresses of cylinder group data structures.
 213 */
 214#define ufs_cgbase(c)   (uspi->s_fpg * (c))
 215#define ufs_cgstart(c)  ((uspi)->fs_magic == UFS2_MAGIC ?  ufs_cgbase(c) : \
 216        (ufs_cgbase(c)  + uspi->s_cgoffset * ((c) & ~uspi->s_cgmask)))
 217#define ufs_cgsblock(c) (ufs_cgstart(c) + uspi->s_sblkno)       /* super blk */
 218#define ufs_cgcmin(c)   (ufs_cgstart(c) + uspi->s_cblkno)       /* cg block */
 219#define ufs_cgimin(c)   (ufs_cgstart(c) + uspi->s_iblkno)       /* inode blk */
 220#define ufs_cgdmin(c)   (ufs_cgstart(c) + uspi->s_dblkno)       /* 1st data */
 221
 222/*
 223 * Macros for handling inode numbers:
 224 *     inode number to file system block offset.
 225 *     inode number to cylinder group number.
 226 *     inode number to file system block address.
 227 */
 228#define ufs_inotocg(x)          ((x) / uspi->s_ipg)
 229#define ufs_inotocgoff(x)       ((x) % uspi->s_ipg)
 230#define ufs_inotofsba(x)        (((u64)ufs_cgimin(ufs_inotocg(x))) + ufs_inotocgoff(x) / uspi->s_inopf)
 231#define ufs_inotofsbo(x)        ((x) % uspi->s_inopf)
 232
 233/*
 234 * Compute the cylinder and rotational position of a cyl block addr.
 235 */
 236#define ufs_cbtocylno(bno) \
 237        ((bno) * uspi->s_nspf / uspi->s_spc)
 238#define ufs_cbtorpos(bno)                                     \
 239        ((UFS_SB(sb)->s_flags & UFS_CG_SUN) ?                 \
 240         (((((bno) * uspi->s_nspf % uspi->s_spc) %            \
 241            uspi->s_nsect) *                                  \
 242           uspi->s_nrpos) / uspi->s_nsect)                    \
 243         :                                                    \
 244        ((((bno) * uspi->s_nspf % uspi->s_spc / uspi->s_nsect \
 245        * uspi->s_trackskew + (bno) * uspi->s_nspf % uspi->s_spc \
 246        % uspi->s_nsect * uspi->s_interleave) % uspi->s_nsect \
 247          * uspi->s_nrpos) / uspi->s_npsect))
 248
 249/*
 250 * The following macros optimize certain frequently calculated
 251 * quantities by using shifts and masks in place of divisions
 252 * modulos and multiplications.
 253 */
 254#define ufs_blkoff(loc)         ((loc) & uspi->s_qbmask)
 255#define ufs_fragoff(loc)        ((loc) & uspi->s_qfmask)
 256#define ufs_lblktosize(blk)     ((blk) << uspi->s_bshift)
 257#define ufs_lblkno(loc)         ((loc) >> uspi->s_bshift)
 258#define ufs_numfrags(loc)       ((loc) >> uspi->s_fshift)
 259#define ufs_blkroundup(size)    (((size) + uspi->s_qbmask) & uspi->s_bmask)
 260#define ufs_fragroundup(size)   (((size) + uspi->s_qfmask) & uspi->s_fmask)
 261#define ufs_fragstoblks(frags)  ((frags) >> uspi->s_fpbshift)
 262#define ufs_blkstofrags(blks)   ((blks) << uspi->s_fpbshift)
 263#define ufs_fragnum(fsb)        ((fsb) & uspi->s_fpbmask)
 264#define ufs_blknum(fsb)         ((fsb) & ~uspi->s_fpbmask)
 265
 266#define UFS_MAXNAMLEN 255
 267#define UFS_MAXMNTLEN 512
 268#define UFS2_MAXMNTLEN 468
 269#define UFS2_MAXVOLLEN 32
 270#define UFS_MAXCSBUFS 31
 271#define UFS_LINK_MAX 32000
 272/*
 273#define UFS2_NOCSPTRS   ((128 / sizeof(void *)) - 4)
 274*/
 275#define UFS2_NOCSPTRS   28
 276
 277/*
 278 * UFS_DIR_PAD defines the directory entries boundaries
 279 * (must be a multiple of 4)
 280 */
 281#define UFS_DIR_PAD                     4
 282#define UFS_DIR_ROUND                   (UFS_DIR_PAD - 1)
 283#define UFS_DIR_REC_LEN(name_len)       (((name_len) + 1 + 8 + UFS_DIR_ROUND) & ~UFS_DIR_ROUND)
 284
 285struct ufs_timeval {
 286        __fs32  tv_sec;
 287        __fs32  tv_usec;
 288};
 289
 290struct ufs_dir_entry {
 291        __fs32  d_ino;                  /* inode number of this entry */
 292        __fs16  d_reclen;               /* length of this entry */
 293        union {
 294                __fs16  d_namlen;               /* actual length of d_name */
 295                struct {
 296                        __u8    d_type;         /* file type */
 297                        __u8    d_namlen;       /* length of string in d_name */
 298                } d_44;
 299        } d_u;
 300        __u8    d_name[UFS_MAXNAMLEN + 1];      /* file name */
 301};
 302
 303struct ufs_csum {
 304        __fs32  cs_ndir;        /* number of directories */
 305        __fs32  cs_nbfree;      /* number of free blocks */
 306        __fs32  cs_nifree;      /* number of free inodes */
 307        __fs32  cs_nffree;      /* number of free frags */
 308};
 309struct ufs2_csum_total {
 310        __fs64  cs_ndir;        /* number of directories */
 311        __fs64  cs_nbfree;      /* number of free blocks */
 312        __fs64  cs_nifree;      /* number of free inodes */
 313        __fs64  cs_nffree;      /* number of free frags */
 314        __fs64   cs_numclusters;        /* number of free clusters */
 315        __fs64   cs_spare[3];   /* future expansion */
 316};
 317
 318struct ufs_csum_core {
 319        __u64   cs_ndir;        /* number of directories */
 320        __u64   cs_nbfree;      /* number of free blocks */
 321        __u64   cs_nifree;      /* number of free inodes */
 322        __u64   cs_nffree;      /* number of free frags */
 323        __u64   cs_numclusters; /* number of free clusters */
 324};
 325
 326/*
 327 * File system flags
 328 */
 329#define UFS_UNCLEAN      0x01    /* file system not clean at mount (unused) */
 330#define UFS_DOSOFTDEP    0x02    /* file system using soft dependencies */
 331#define UFS_NEEDSFSCK    0x04    /* needs sync fsck (FreeBSD compat, unused) */
 332#define UFS_INDEXDIRS    0x08    /* kernel supports indexed directories */
 333#define UFS_ACLS         0x10    /* file system has ACLs enabled */
 334#define UFS_MULTILABEL   0x20    /* file system is MAC multi-label */
 335#define UFS_FLAGS_UPDATED 0x80   /* flags have been moved to new location */
 336
 337#if 0
 338/*
 339 * This is the actual superblock, as it is laid out on the disk.
 340 * Do NOT use this structure, because of sizeof(ufs_super_block) > 512 and
 341 * it may occupy several blocks, use
 342 * struct ufs_super_block_(first,second,third) instead.
 343 */
 344struct ufs_super_block {
 345        union {
 346                struct {
 347                        __fs32  fs_link;        /* UNUSED */
 348                } fs_42;
 349                struct {
 350                        __fs32  fs_state;       /* file system state flag */
 351                } fs_sun;
 352        } fs_u0;
 353        __fs32  fs_rlink;       /* UNUSED */
 354        __fs32  fs_sblkno;      /* addr of super-block in filesys */
 355        __fs32  fs_cblkno;      /* offset of cyl-block in filesys */
 356        __fs32  fs_iblkno;      /* offset of inode-blocks in filesys */
 357        __fs32  fs_dblkno;      /* offset of first data after cg */
 358        __fs32  fs_cgoffset;    /* cylinder group offset in cylinder */
 359        __fs32  fs_cgmask;      /* used to calc mod fs_ntrak */
 360        __fs32  fs_time;        /* last time written -- time_t */
 361        __fs32  fs_size;        /* number of blocks in fs */
 362        __fs32  fs_dsize;       /* number of data blocks in fs */
 363        __fs32  fs_ncg;         /* number of cylinder groups */
 364        __fs32  fs_bsize;       /* size of basic blocks in fs */
 365        __fs32  fs_fsize;       /* size of frag blocks in fs */
 366        __fs32  fs_frag;        /* number of frags in a block in fs */
 367/* these are configuration parameters */
 368        __fs32  fs_minfree;     /* minimum percentage of free blocks */
 369        __fs32  fs_rotdelay;    /* num of ms for optimal next block */
 370        __fs32  fs_rps;         /* disk revolutions per second */
 371/* these fields can be computed from the others */
 372        __fs32  fs_bmask;       /* ``blkoff'' calc of blk offsets */
 373        __fs32  fs_fmask;       /* ``fragoff'' calc of frag offsets */
 374        __fs32  fs_bshift;      /* ``lblkno'' calc of logical blkno */
 375        __fs32  fs_fshift;      /* ``numfrags'' calc number of frags */
 376/* these are configuration parameters */
 377        __fs32  fs_maxcontig;   /* max number of contiguous blks */
 378        __fs32  fs_maxbpg;      /* max number of blks per cyl group */
 379/* these fields can be computed from the others */
 380        __fs32  fs_fragshift;   /* block to frag shift */
 381        __fs32  fs_fsbtodb;     /* fsbtodb and dbtofsb shift constant */
 382        __fs32  fs_sbsize;      /* actual size of super block */
 383        __fs32  fs_csmask;      /* csum block offset */
 384        __fs32  fs_csshift;     /* csum block number */
 385        __fs32  fs_nindir;      /* value of NINDIR */
 386        __fs32  fs_inopb;       /* value of INOPB */
 387        __fs32  fs_nspf;        /* value of NSPF */
 388/* yet another configuration parameter */
 389        __fs32  fs_optim;       /* optimization preference, see below */
 390/* these fields are derived from the hardware */
 391        union {
 392                struct {
 393                        __fs32  fs_npsect;      /* # sectors/track including spares */
 394                } fs_sun;
 395                struct {
 396                        __fs32  fs_state;       /* file system state time stamp */
 397                } fs_sunx86;
 398        } fs_u1;
 399        __fs32  fs_interleave;  /* hardware sector interleave */
 400        __fs32  fs_trackskew;   /* sector 0 skew, per track */
 401/* a unique id for this filesystem (currently unused and unmaintained) */
 402/* In 4.3 Tahoe this space is used by fs_headswitch and fs_trkseek */
 403/* Neither of those fields is used in the Tahoe code right now but */
 404/* there could be problems if they are.                            */
 405        __fs32  fs_id[2];       /* file system id */
 406/* sizes determined by number of cylinder groups and their sizes */
 407        __fs32  fs_csaddr;      /* blk addr of cyl grp summary area */
 408        __fs32  fs_cssize;      /* size of cyl grp summary area */
 409        __fs32  fs_cgsize;      /* cylinder group size */
 410/* these fields are derived from the hardware */
 411        __fs32  fs_ntrak;       /* tracks per cylinder */
 412        __fs32  fs_nsect;       /* sectors per track */
 413        __fs32  fs_spc;         /* sectors per cylinder */
 414/* this comes from the disk driver partitioning */
 415        __fs32  fs_ncyl;        /* cylinders in file system */
 416/* these fields can be computed from the others */
 417        __fs32  fs_cpg;         /* cylinders per group */
 418        __fs32  fs_ipg;         /* inodes per cylinder group */
 419        __fs32  fs_fpg;         /* blocks per group * fs_frag */
 420/* this data must be re-computed after crashes */
 421        struct ufs_csum fs_cstotal;     /* cylinder summary information */
 422/* these fields are cleared at mount time */
 423        __s8    fs_fmod;        /* super block modified flag */
 424        __s8    fs_clean;       /* file system is clean flag */
 425        __s8    fs_ronly;       /* mounted read-only flag */
 426        __s8    fs_flags;
 427        union {
 428                struct {
 429                        __s8    fs_fsmnt[UFS_MAXMNTLEN];/* name mounted on */
 430                        __fs32  fs_cgrotor;     /* last cg searched */
 431                        __fs32  fs_csp[UFS_MAXCSBUFS];/*list of fs_cs info buffers */
 432                        __fs32  fs_maxcluster;
 433                        __fs32  fs_cpc;         /* cyl per cycle in postbl */
 434                        __fs16  fs_opostbl[16][8]; /* old rotation block list head */
 435                } fs_u1;
 436                struct {
 437                        __s8  fs_fsmnt[UFS2_MAXMNTLEN]; /* name mounted on */
 438                        __u8   fs_volname[UFS2_MAXVOLLEN]; /* volume name */
 439                        __fs64  fs_swuid;               /* system-wide uid */
 440                        __fs32  fs_pad; /* due to alignment of fs_swuid */
 441                        __fs32   fs_cgrotor;     /* last cg searched */
 442                        __fs32   fs_ocsp[UFS2_NOCSPTRS]; /*list of fs_cs info buffers */
 443                        __fs32   fs_contigdirs;/*# of contiguously allocated dirs */
 444                        __fs32   fs_csp;        /* cg summary info buffer for fs_cs */
 445                        __fs32   fs_maxcluster;
 446                        __fs32   fs_active;/* used by snapshots to track fs */
 447                        __fs32   fs_old_cpc;    /* cyl per cycle in postbl */
 448                        __fs32   fs_maxbsize;/*maximum blocking factor permitted */
 449                        __fs64   fs_sparecon64[17];/*old rotation block list head */
 450                        __fs64   fs_sblockloc; /* byte offset of standard superblock */
 451                        struct  ufs2_csum_total fs_cstotal;/*cylinder summary information*/
 452                        struct  ufs_timeval    fs_time;         /* last time written */
 453                        __fs64    fs_size;              /* number of blocks in fs */
 454                        __fs64    fs_dsize;     /* number of data blocks in fs */
 455                        __fs64   fs_csaddr;     /* blk addr of cyl grp summary area */
 456                        __fs64    fs_pendingblocks;/* blocks in process of being freed */
 457                        __fs32    fs_pendinginodes;/*inodes in process of being freed */
 458                } fs_u2;
 459        }  fs_u11;
 460        union {
 461                struct {
 462                        __fs32  fs_sparecon[53];/* reserved for future constants */
 463                        __fs32  fs_reclaim;
 464                        __fs32  fs_sparecon2[1];
 465                        __fs32  fs_state;       /* file system state time stamp */
 466                        __fs32  fs_qbmask[2];   /* ~usb_bmask */
 467                        __fs32  fs_qfmask[2];   /* ~usb_fmask */
 468                } fs_sun;
 469                struct {
 470                        __fs32  fs_sparecon[53];/* reserved for future constants */
 471                        __fs32  fs_reclaim;
 472                        __fs32  fs_sparecon2[1];
 473                        __fs32  fs_npsect;      /* # sectors/track including spares */
 474                        __fs32  fs_qbmask[2];   /* ~usb_bmask */
 475                        __fs32  fs_qfmask[2];   /* ~usb_fmask */
 476                } fs_sunx86;
 477                struct {
 478                        __fs32  fs_sparecon[50];/* reserved for future constants */
 479                        __fs32  fs_contigsumsize;/* size of cluster summary array */
 480                        __fs32  fs_maxsymlinklen;/* max length of an internal symlink */
 481                        __fs32  fs_inodefmt;    /* format of on-disk inodes */
 482                        __fs32  fs_maxfilesize[2];      /* max representable file size */
 483                        __fs32  fs_qbmask[2];   /* ~usb_bmask */
 484                        __fs32  fs_qfmask[2];   /* ~usb_fmask */
 485                        __fs32  fs_state;       /* file system state time stamp */
 486                } fs_44;
 487        } fs_u2;
 488        __fs32  fs_postblformat;        /* format of positional layout tables */
 489        __fs32  fs_nrpos;               /* number of rotational positions */
 490        __fs32  fs_postbloff;           /* (__s16) rotation block list head */
 491        __fs32  fs_rotbloff;            /* (__u8) blocks for each rotation */
 492        __fs32  fs_magic;               /* magic number */
 493        __u8    fs_space[1];            /* list of blocks for each rotation */
 494};
 495#endif/*struct ufs_super_block*/
 496
 497/*
 498 * Preference for optimization.
 499 */
 500#define UFS_OPTTIME     0       /* minimize allocation time */
 501#define UFS_OPTSPACE    1       /* minimize disk fragmentation */
 502
 503/*
 504 * Rotational layout table format types
 505 */
 506#define UFS_42POSTBLFMT         -1      /* 4.2BSD rotational table format */
 507#define UFS_DYNAMICPOSTBLFMT    1       /* dynamic rotational table format */
 508
 509/*
 510 * Convert cylinder group to base address of its global summary info.
 511 */
 512#define fs_cs(indx) s_csp[(indx)]
 513
 514/*
 515 * Cylinder group block for a file system.
 516 *
 517 * Writable fields in the cylinder group are protected by the associated
 518 * super block lock fs->fs_lock.
 519 */
 520#define CG_MAGIC        0x090255
 521#define ufs_cg_chkmagic(sb, ucg) \
 522        (fs32_to_cpu((sb), (ucg)->cg_magic) == CG_MAGIC)
 523/*
 524 * Macros for access to old cylinder group array structures
 525 */
 526#define ufs_ocg_blktot(sb, ucg)      fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_btot)
 527#define ufs_ocg_blks(sb, ucg, cylno) fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_b[cylno])
 528#define ufs_ocg_inosused(sb, ucg)    fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_iused)
 529#define ufs_ocg_blksfree(sb, ucg)    fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_free)
 530#define ufs_ocg_chkmagic(sb, ucg) \
 531        (fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_magic) == CG_MAGIC)
 532
 533/*
 534 * size of this structure is 172 B
 535 */
 536struct  ufs_cylinder_group {
 537        __fs32  cg_link;                /* linked list of cyl groups */
 538        __fs32  cg_magic;               /* magic number */
 539        __fs32  cg_time;                /* time last written */
 540        __fs32  cg_cgx;                 /* we are the cgx'th cylinder group */
 541        __fs16  cg_ncyl;                /* number of cyl's this cg */
 542        __fs16  cg_niblk;               /* number of inode blocks this cg */
 543        __fs32  cg_ndblk;               /* number of data blocks this cg */
 544        struct  ufs_csum cg_cs;         /* cylinder summary information */
 545        __fs32  cg_rotor;               /* position of last used block */
 546        __fs32  cg_frotor;              /* position of last used frag */
 547        __fs32  cg_irotor;              /* position of last used inode */
 548        __fs32  cg_frsum[UFS_MAXFRAG];  /* counts of available frags */
 549        __fs32  cg_btotoff;             /* (__u32) block totals per cylinder */
 550        __fs32  cg_boff;                /* (short) free block positions */
 551        __fs32  cg_iusedoff;            /* (char) used inode map */
 552        __fs32  cg_freeoff;             /* (u_char) free block map */
 553        __fs32  cg_nextfreeoff;         /* (u_char) next available space */
 554        union {
 555                struct {
 556                        __fs32  cg_clustersumoff;       /* (u_int32) counts of avail clusters */
 557                        __fs32  cg_clusteroff;          /* (u_int8) free cluster map */
 558                        __fs32  cg_nclusterblks;        /* number of clusters this cg */
 559                        __fs32  cg_sparecon[13];        /* reserved for future use */
 560                } cg_44;
 561                struct {
 562                        __fs32  cg_clustersumoff;/* (u_int32) counts of avail clusters */
 563                        __fs32  cg_clusteroff;  /* (u_int8) free cluster map */
 564                        __fs32  cg_nclusterblks;/* number of clusters this cg */
 565                        __fs32   cg_niblk; /* number of inode blocks this cg */
 566                        __fs32   cg_initediblk; /* last initialized inode */
 567                        __fs32   cg_sparecon32[3];/* reserved for future use */
 568                        __fs64   cg_time;       /* time last written */
 569                        __fs64  cg_sparecon[3]; /* reserved for future use */
 570                } cg_u2;
 571                __fs32  cg_sparecon[16];        /* reserved for future use */
 572        } cg_u;
 573        __u8    cg_space[1];            /* space for cylinder group maps */
 574/* actually longer */
 575};
 576
 577/* Historic Cylinder group info */
 578struct ufs_old_cylinder_group {
 579        __fs32  cg_link;                /* linked list of cyl groups */
 580        __fs32  cg_rlink;               /* for incore cyl groups     */
 581        __fs32  cg_time;                /* time last written */
 582        __fs32  cg_cgx;                 /* we are the cgx'th cylinder group */
 583        __fs16  cg_ncyl;                /* number of cyl's this cg */
 584        __fs16  cg_niblk;               /* number of inode blocks this cg */
 585        __fs32  cg_ndblk;               /* number of data blocks this cg */
 586        struct  ufs_csum cg_cs;         /* cylinder summary information */
 587        __fs32  cg_rotor;               /* position of last used block */
 588        __fs32  cg_frotor;              /* position of last used frag */
 589        __fs32  cg_irotor;              /* position of last used inode */
 590        __fs32  cg_frsum[8];            /* counts of available frags */
 591        __fs32  cg_btot[32];            /* block totals per cylinder */
 592        __fs16  cg_b[32][8];            /* positions of free blocks */
 593        __u8    cg_iused[256];          /* used inode map */
 594        __fs32  cg_magic;               /* magic number */
 595        __u8    cg_free[1];             /* free block map */
 596/* actually longer */
 597};
 598
 599/*
 600 * structure of an on-disk inode
 601 */
 602struct ufs_inode {
 603        __fs16  ui_mode;                /*  0x0 */
 604        __fs16  ui_nlink;               /*  0x2 */
 605        union {
 606                struct {
 607                        __fs16  ui_suid;        /*  0x4 */
 608                        __fs16  ui_sgid;        /*  0x6 */
 609                } oldids;
 610                __fs32  ui_inumber;             /*  0x4 lsf: inode number */
 611                __fs32  ui_author;              /*  0x4 GNU HURD: author */
 612        } ui_u1;
 613        __fs64  ui_size;                /*  0x8 */
 614        struct ufs_timeval ui_atime;    /* 0x10 access */
 615        struct ufs_timeval ui_mtime;    /* 0x18 modification */
 616        struct ufs_timeval ui_ctime;    /* 0x20 creation */
 617        union {
 618                struct {
 619                        __fs32  ui_db[UFS_NDADDR];/* 0x28 data blocks */
 620                        __fs32  ui_ib[UFS_NINDIR];/* 0x58 indirect blocks */
 621                } ui_addr;
 622                __u8    ui_symlink[4*(UFS_NDADDR+UFS_NINDIR)];/* 0x28 fast symlink */
 623        } ui_u2;
 624        __fs32  ui_flags;               /* 0x64 immutable, append-only... */
 625        __fs32  ui_blocks;              /* 0x68 blocks in use */
 626        __fs32  ui_gen;                 /* 0x6c like ext2 i_version, for NFS support */
 627        union {
 628                struct {
 629                        __fs32  ui_shadow;      /* 0x70 shadow inode with security data */
 630                        __fs32  ui_uid;         /* 0x74 long EFT version of uid */
 631                        __fs32  ui_gid;         /* 0x78 long EFT version of gid */
 632                        __fs32  ui_oeftflag;    /* 0x7c reserved */
 633                } ui_sun;
 634                struct {
 635                        __fs32  ui_uid;         /* 0x70 File owner */
 636                        __fs32  ui_gid;         /* 0x74 File group */
 637                        __fs32  ui_spare[2];    /* 0x78 reserved */
 638                } ui_44;
 639                struct {
 640                        __fs32  ui_uid;         /* 0x70 */
 641                        __fs32  ui_gid;         /* 0x74 */
 642                        __fs16  ui_modeh;       /* 0x78 mode high bits */
 643                        __fs16  ui_spare;       /* 0x7A unused */
 644                        __fs32  ui_trans;       /* 0x7c filesystem translator */
 645                } ui_hurd;
 646        } ui_u3;
 647};
 648
 649#define UFS_NXADDR  2            /* External addresses in inode. */
 650struct ufs2_inode {
 651        __fs16     ui_mode;        /*   0: IFMT, permissions; see below. */
 652        __fs16     ui_nlink;       /*   2: File link count. */
 653        __fs32     ui_uid;         /*   4: File owner. */
 654        __fs32     ui_gid;         /*   8: File group. */
 655        __fs32     ui_blksize;     /*  12: Inode blocksize. */
 656        __fs64     ui_size;        /*  16: File byte count. */
 657        __fs64     ui_blocks;      /*  24: Bytes actually held. */
 658        __fs64   ui_atime;       /*  32: Last access time. */
 659        __fs64   ui_mtime;       /*  40: Last modified time. */
 660        __fs64   ui_ctime;       /*  48: Last inode change time. */
 661        __fs64   ui_birthtime;   /*  56: Inode creation time. */
 662        __fs32     ui_mtimensec;   /*  64: Last modified time. */
 663        __fs32     ui_atimensec;   /*  68: Last access time. */
 664        __fs32     ui_ctimensec;   /*  72: Last inode change time. */
 665        __fs32     ui_birthnsec;   /*  76: Inode creation time. */
 666        __fs32     ui_gen;         /*  80: Generation number. */
 667        __fs32     ui_kernflags;   /*  84: Kernel flags. */
 668        __fs32     ui_flags;       /*  88: Status flags (chflags). */
 669        __fs32     ui_extsize;     /*  92: External attributes block. */
 670        __fs64     ui_extb[UFS_NXADDR];/*  96: External attributes block. */
 671        union {
 672                struct {
 673                        __fs64     ui_db[UFS_NDADDR]; /* 112: Direct disk blocks. */
 674                        __fs64     ui_ib[UFS_NINDIR];/* 208: Indirect disk blocks.*/
 675                } ui_addr;
 676        __u8    ui_symlink[2*4*(UFS_NDADDR+UFS_NINDIR)];/* 0x28 fast symlink */
 677        } ui_u2;
 678        __fs64     ui_spare[3];    /* 232: Reserved; currently unused */
 679};
 680
 681
 682/* FreeBSD has these in sys/stat.h */
 683/* ui_flags that can be set by a file owner */
 684#define UFS_UF_SETTABLE   0x0000ffff
 685#define UFS_UF_NODUMP     0x00000001  /* do not dump */
 686#define UFS_UF_IMMUTABLE  0x00000002  /* immutable (can't "change") */
 687#define UFS_UF_APPEND     0x00000004  /* append-only */
 688#define UFS_UF_OPAQUE     0x00000008  /* directory is opaque (unionfs) */
 689#define UFS_UF_NOUNLINK   0x00000010  /* can't be removed or renamed */
 690/* ui_flags that only root can set */
 691#define UFS_SF_SETTABLE   0xffff0000
 692#define UFS_SF_ARCHIVED   0x00010000  /* archived */
 693#define UFS_SF_IMMUTABLE  0x00020000  /* immutable (can't "change") */
 694#define UFS_SF_APPEND     0x00040000  /* append-only */
 695#define UFS_SF_NOUNLINK   0x00100000  /* can't be removed or renamed */
 696
 697/*
 698 * This structure is used for reading disk structures larger
 699 * than the size of fragment.
 700 */
 701struct ufs_buffer_head {
 702        __u64 fragment;                 /* first fragment */
 703        __u64 count;                            /* number of fragments */
 704        struct buffer_head * bh[UFS_MAXFRAG];   /* buffers */
 705};
 706
 707struct ufs_cg_private_info {
 708        struct ufs_buffer_head c_ubh;
 709        __u32   c_cgx;          /* number of cylidner group */
 710        __u16   c_ncyl;         /* number of cyl's this cg */
 711        __u16   c_niblk;        /* number of inode blocks this cg */
 712        __u32   c_ndblk;        /* number of data blocks this cg */
 713        __u32   c_rotor;        /* position of last used block */
 714        __u32   c_frotor;       /* position of last used frag */
 715        __u32   c_irotor;       /* position of last used inode */
 716        __u32   c_btotoff;      /* (__u32) block totals per cylinder */
 717        __u32   c_boff;         /* (short) free block positions */
 718        __u32   c_iusedoff;     /* (char) used inode map */
 719        __u32   c_freeoff;      /* (u_char) free block map */
 720        __u32   c_nextfreeoff;  /* (u_char) next available space */
 721        __u32   c_clustersumoff;/* (u_int32) counts of avail clusters */
 722        __u32   c_clusteroff;   /* (u_int8) free cluster map */
 723        __u32   c_nclusterblks; /* number of clusters this cg */
 724};
 725
 726
 727struct ufs_sb_private_info {
 728        struct ufs_buffer_head s_ubh; /* buffer containing super block */
 729        struct ufs_csum_core cs_total;
 730        __u32   s_sblkno;       /* offset of super-blocks in filesys */
 731        __u32   s_cblkno;       /* offset of cg-block in filesys */
 732        __u32   s_iblkno;       /* offset of inode-blocks in filesys */
 733        __u32   s_dblkno;       /* offset of first data after cg */
 734        __u32   s_cgoffset;     /* cylinder group offset in cylinder */
 735        __u32   s_cgmask;       /* used to calc mod fs_ntrak */
 736        __u32   s_size;         /* number of blocks (fragments) in fs */
 737        __u32   s_dsize;        /* number of data blocks in fs */
 738        __u64   s_u2_size;      /* ufs2: number of blocks (fragments) in fs */
 739        __u64   s_u2_dsize;     /*ufs2:  number of data blocks in fs */
 740        __u32   s_ncg;          /* number of cylinder groups */
 741        __u32   s_bsize;        /* size of basic blocks */
 742        __u32   s_fsize;        /* size of fragments */
 743        __u32   s_fpb;          /* fragments per block */
 744        __u32   s_minfree;      /* minimum percentage of free blocks */
 745        __u32   s_bmask;        /* `blkoff'' calc of blk offsets */
 746        __u32   s_fmask;        /* s_fsize mask */
 747        __u32   s_bshift;       /* `lblkno'' calc of logical blkno */
 748        __u32   s_fshift;       /* s_fsize shift */
 749        __u32   s_fpbshift;     /* fragments per block shift */
 750        __u32   s_fsbtodb;      /* fsbtodb and dbtofsb shift constant */
 751        __u32   s_sbsize;       /* actual size of super block */
 752        __u32   s_csmask;       /* csum block offset */
 753        __u32   s_csshift;      /* csum block number */
 754        __u32   s_nindir;       /* value of NINDIR */
 755        __u32   s_inopb;        /* value of INOPB */
 756        __u32   s_nspf;         /* value of NSPF */
 757        __u32   s_npsect;       /* # sectors/track including spares */
 758        __u32   s_interleave;   /* hardware sector interleave */
 759        __u32   s_trackskew;    /* sector 0 skew, per track */
 760        __u64   s_csaddr;       /* blk addr of cyl grp summary area */
 761        __u32   s_cssize;       /* size of cyl grp summary area */
 762        __u32   s_cgsize;       /* cylinder group size */
 763        __u32   s_ntrak;        /* tracks per cylinder */
 764        __u32   s_nsect;        /* sectors per track */
 765        __u32   s_spc;          /* sectors per cylinder */
 766        __u32   s_ipg;          /* inodes per cylinder group */
 767        __u32   s_fpg;          /* fragments per group */
 768        __u32   s_cpc;          /* cyl per cycle in postbl */
 769        __s32   s_contigsumsize;/* size of cluster summary array, 44bsd */
 770        __s64   s_qbmask;       /* ~usb_bmask */
 771        __s64   s_qfmask;       /* ~usb_fmask */
 772        __s32   s_postblformat; /* format of positional layout tables */
 773        __s32   s_nrpos;        /* number of rotational positions */
 774        __s32   s_postbloff;    /* (__s16) rotation block list head */
 775        __s32   s_rotbloff;     /* (__u8) blocks for each rotation */
 776
 777        __u32   s_fpbmask;      /* fragments per block mask */
 778        __u32   s_apb;          /* address per block */
 779        __u32   s_2apb;         /* address per block^2 */
 780        __u32   s_3apb;         /* address per block^3 */
 781        __u32   s_apbmask;      /* address per block mask */
 782        __u32   s_apbshift;     /* address per block shift */
 783        __u32   s_2apbshift;    /* address per block shift * 2 */
 784        __u32   s_3apbshift;    /* address per block shift * 3 */
 785        __u32   s_nspfshift;    /* number of sector per fragment shift */
 786        __u32   s_nspb;         /* number of sector per block */
 787        __u32   s_inopf;        /* inodes per fragment */
 788        __u32   s_sbbase;       /* offset of NeXTstep superblock */
 789        __u32   s_bpf;          /* bits per fragment */
 790        __u32   s_bpfshift;     /* bits per fragment shift*/
 791        __u32   s_bpfmask;      /* bits per fragment mask */
 792
 793        __u32   s_maxsymlinklen;/* upper limit on fast symlinks' size */
 794        __s32   fs_magic;       /* filesystem magic */
 795        unsigned int s_dirblksize;
 796};
 797
 798/*
 799 * Sizes of this structures are:
 800 *      ufs_super_block_first   512
 801 *      ufs_super_block_second  512
 802 *      ufs_super_block_third   356
 803 */
 804struct ufs_super_block_first {
 805        union {
 806                struct {
 807                        __fs32  fs_link;        /* UNUSED */
 808                } fs_42;
 809                struct {
 810                        __fs32  fs_state;       /* file system state flag */
 811                } fs_sun;
 812        } fs_u0;
 813        __fs32  fs_rlink;
 814        __fs32  fs_sblkno;
 815        __fs32  fs_cblkno;
 816        __fs32  fs_iblkno;
 817        __fs32  fs_dblkno;
 818        __fs32  fs_cgoffset;
 819        __fs32  fs_cgmask;
 820        __fs32  fs_time;
 821        __fs32  fs_size;
 822        __fs32  fs_dsize;
 823        __fs32  fs_ncg;
 824        __fs32  fs_bsize;
 825        __fs32  fs_fsize;
 826        __fs32  fs_frag;
 827        __fs32  fs_minfree;
 828        __fs32  fs_rotdelay;
 829        __fs32  fs_rps;
 830        __fs32  fs_bmask;
 831        __fs32  fs_fmask;
 832        __fs32  fs_bshift;
 833        __fs32  fs_fshift;
 834        __fs32  fs_maxcontig;
 835        __fs32  fs_maxbpg;
 836        __fs32  fs_fragshift;
 837        __fs32  fs_fsbtodb;
 838        __fs32  fs_sbsize;
 839        __fs32  fs_csmask;
 840        __fs32  fs_csshift;
 841        __fs32  fs_nindir;
 842        __fs32  fs_inopb;
 843        __fs32  fs_nspf;
 844        __fs32  fs_optim;
 845        union {
 846                struct {
 847                        __fs32  fs_npsect;
 848                } fs_sun;
 849                struct {
 850                        __fs32  fs_state;
 851                } fs_sunx86;
 852        } fs_u1;
 853        __fs32  fs_interleave;
 854        __fs32  fs_trackskew;
 855        __fs32  fs_id[2];
 856        __fs32  fs_csaddr;
 857        __fs32  fs_cssize;
 858        __fs32  fs_cgsize;
 859        __fs32  fs_ntrak;
 860        __fs32  fs_nsect;
 861        __fs32  fs_spc;
 862        __fs32  fs_ncyl;
 863        __fs32  fs_cpg;
 864        __fs32  fs_ipg;
 865        __fs32  fs_fpg;
 866        struct ufs_csum fs_cstotal;
 867        __s8    fs_fmod;
 868        __s8    fs_clean;
 869        __s8    fs_ronly;
 870        __s8    fs_flags;
 871        __s8    fs_fsmnt[UFS_MAXMNTLEN - 212];
 872
 873};
 874
 875struct ufs_super_block_second {
 876        union {
 877                struct {
 878                        __s8    fs_fsmnt[212];
 879                        __fs32  fs_cgrotor;
 880                        __fs32  fs_csp[UFS_MAXCSBUFS];
 881                        __fs32  fs_maxcluster;
 882                        __fs32  fs_cpc;
 883                        __fs16  fs_opostbl[82];
 884                } fs_u1;
 885                struct {
 886                        __s8  fs_fsmnt[UFS2_MAXMNTLEN - UFS_MAXMNTLEN + 212];
 887                        __u8   fs_volname[UFS2_MAXVOLLEN];
 888                        __fs64  fs_swuid;
 889                        __fs32  fs_pad;
 890                        __fs32   fs_cgrotor;
 891                        __fs32   fs_ocsp[UFS2_NOCSPTRS];
 892                        __fs32   fs_contigdirs;
 893                        __fs32   fs_csp;
 894                        __fs32   fs_maxcluster;
 895                        __fs32   fs_active;
 896                        __fs32   fs_old_cpc;
 897                        __fs32   fs_maxbsize;
 898                        __fs64   fs_sparecon64[17];
 899                        __fs64   fs_sblockloc;
 900                        __fs64  cs_ndir;
 901                        __fs64  cs_nbfree;
 902                } fs_u2;
 903        } fs_un;
 904};
 905
 906struct ufs_super_block_third {
 907        union {
 908                struct {
 909                        __fs16  fs_opostbl[46];
 910                } fs_u1;
 911                struct {
 912                        __fs64  cs_nifree;      /* number of free inodes */
 913                        __fs64  cs_nffree;      /* number of free frags */
 914                        __fs64   cs_numclusters;        /* number of free clusters */
 915                        __fs64   cs_spare[3];   /* future expansion */
 916                        struct  ufs_timeval    fs_time;         /* last time written */
 917                        __fs64    fs_size;              /* number of blocks in fs */
 918                        __fs64    fs_dsize;     /* number of data blocks in fs */
 919                        __fs64   fs_csaddr;     /* blk addr of cyl grp summary area */
 920                        __fs64    fs_pendingblocks;/* blocks in process of being freed */
 921                        __fs32    fs_pendinginodes;/*inodes in process of being freed */
 922                } __attribute__ ((packed)) fs_u2;
 923        } fs_un1;
 924        union {
 925                struct {
 926                        __fs32  fs_sparecon[53];/* reserved for future constants */
 927                        __fs32  fs_reclaim;
 928                        __fs32  fs_sparecon2[1];
 929                        __fs32  fs_state;       /* file system state time stamp */
 930                        __fs32  fs_qbmask[2];   /* ~usb_bmask */
 931                        __fs32  fs_qfmask[2];   /* ~usb_fmask */
 932                } fs_sun;
 933                struct {
 934                        __fs32  fs_sparecon[53];/* reserved for future constants */
 935                        __fs32  fs_reclaim;
 936                        __fs32  fs_sparecon2[1];
 937                        __fs32  fs_npsect;      /* # sectors/track including spares */
 938                        __fs32  fs_qbmask[2];   /* ~usb_bmask */
 939                        __fs32  fs_qfmask[2];   /* ~usb_fmask */
 940                } fs_sunx86;
 941                struct {
 942                        __fs32  fs_sparecon[50];/* reserved for future constants */
 943                        __fs32  fs_contigsumsize;/* size of cluster summary array */
 944                        __fs32  fs_maxsymlinklen;/* max length of an internal symlink */
 945                        __fs32  fs_inodefmt;    /* format of on-disk inodes */
 946                        __fs32  fs_maxfilesize[2];      /* max representable file size */
 947                        __fs32  fs_qbmask[2];   /* ~usb_bmask */
 948                        __fs32  fs_qfmask[2];   /* ~usb_fmask */
 949                        __fs32  fs_state;       /* file system state time stamp */
 950                } fs_44;
 951        } fs_un2;
 952        __fs32  fs_postblformat;
 953        __fs32  fs_nrpos;
 954        __fs32  fs_postbloff;
 955        __fs32  fs_rotbloff;
 956        __fs32  fs_magic;
 957        __u8    fs_space[1];
 958};
 959
 960#endif /* __LINUX_UFS_FS_H */
 961
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