include/linux/ufs_fs.h

   1 /*
   2  *  linux/include/linux/ufs_fs.h
   3  *
   4  * Copyright (C) 1996
   5  * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
   6  * Laboratory for Computer Science Research Computing Facility
   7  * Rutgers, The State University of New Jersey
   8  *
   9  * Clean swab support by Fare <fare@tunes.org>
  10  * just hope no one is using NNUUXXI on __?64 structure elements
  11  * 64-bit clean thanks to Maciej W. Rozycki <macro@ds2.pg.gda.pl>
  12  *
  13  * 4.4BSD (FreeBSD) support added on February 1st 1998 by
  14  * Niels Kristian Bech Jensen <nkbj@image.dk> partially based
  15  * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.
  16  *
  17  * NeXTstep support added on February 5th 1998 by
  18  * Niels Kristian Bech Jensen <nkbj@image.dk>.
  19  *
  20  * Write support by Daniel Pirkl <daniel.pirkl@email.cz>
  21  *
  22  * HP/UX hfs filesystem support added by
  23  * Martin K. Petersen <mkp@mkp.net>, August 1999
  24  *
  25  * UFS2 (of FreeBSD 5.x) support added by
  26  * Niraj Kumar <niraj17@iitbombay.org>  , Jan 2004
  27  *
  28  */
  29
  30 #ifndef __LINUX_UFS_FS_H
  31 #define __LINUX_UFS_FS_H
  32
  33 #include <linux/types.h>
  34 #include <linux/kernel.h>
  35 #include <linux/stat.h>
  36 #include <linux/fs.h>
  37
  38 #ifndef __KERNEL__
  39 typedef __u64 __fs64;
  40 typedef __u32 __fs32;
  41 typedef __u16 __fs16;
  42 #else
  43 #include <asm/div64.h>
  44 typedef __u64 __bitwise __fs64;
  45 typedef __u32 __bitwise __fs32;
  46 typedef __u16 __bitwise __fs16;
  47 #endif
  48
  49 #ifdef __KERNEL__
  50 #include <linux/ufs_fs_i.h>
  51 #include <linux/ufs_fs_sb.h>
  52 #endif
  53
  54 #define UFS_BBLOCK 0
  55 #define UFS_BBSIZE 8192
  56 #define UFS_SBLOCK 8192
  57 #define UFS_SBSIZE 8192
  58
  59 #define UFS_SECTOR_SIZE 512
  60 #define UFS_SECTOR_BITS 9
  61 #define UFS_MAGIC  0x00011954
  62 #define UFS2_MAGIC 0x19540119
  63 #define UFS_CIGAM  0x54190100 /* byteswapped MAGIC */
  64
  65 /* Copied from FreeBSD */
  66 /*
  67  * Each disk drive contains some number of filesystems.
  68  * A filesystem consists of a number of cylinder groups.
  69  * Each cylinder group has inodes and data.
  70  *
  71  * A filesystem is described by its super-block, which in turn
  72  * describes the cylinder groups.  The super-block is critical
  73  * data and is replicated in each cylinder group to protect against
  74  * catastrophic loss.  This is done at `newfs' time and the critical
  75  * super-block data does not change, so the copies need not be
  76  * referenced further unless disaster strikes.
  77  *
  78  * For filesystem fs, the offsets of the various blocks of interest
  79  * are given in the super block as:
  80  *      [fs->fs_sblkno]         Super-block
  81  *      [fs->fs_cblkno]         Cylinder group block
  82  *      [fs->fs_iblkno]         Inode blocks
  83  *      [fs->fs_dblkno]         Data blocks
  84  * The beginning of cylinder group cg in fs, is given by
  85  * the ``cgbase(fs, cg)'' macro.
  86  *
  87  * Depending on the architecture and the media, the superblock may
  88  * reside in any one of four places. For tiny media where every block
  89  * counts, it is placed at the very front of the partition. Historically,
  90  * UFS1 placed it 8K from the front to leave room for the disk label and
  91  * a small bootstrap. For UFS2 it got moved to 64K from the front to leave
  92  * room for the disk label and a bigger bootstrap, and for really piggy
  93  * systems we check at 256K from the front if the first three fail. In
  94  * all cases the size of the superblock will be SBLOCKSIZE. All values are
  95  * given in byte-offset form, so they do not imply a sector size. The
  96  * SBLOCKSEARCH specifies the order in which the locations should be searched.
  97  */
  98 #define SBLOCK_FLOPPY        0
  99 #define SBLOCK_UFS1       8192
 100 #define SBLOCK_UFS2      65536
 101 #define SBLOCK_PIGGY    262144
 102 #define SBLOCKSIZE        8192
 103 #define SBLOCKSEARCH \
 104         { SBLOCK_UFS2, SBLOCK_UFS1, SBLOCK_FLOPPY, SBLOCK_PIGGY, -1 }
 105
 106
 107 /* HP specific MAGIC values */
 108
 109 #define UFS_MAGIC_LFN   0x00095014 /* fs supports filenames > 14 chars */
 110 #define UFS_CIGAM_LFN   0x14500900 /* srahc 41 < semanelif stroppus sf */
 111
 112 #define UFS_MAGIC_SEC   0x00612195 /* B1 security fs */
 113 #define UFS_CIGAM_SEC   0x95216100
 114
 115 #define UFS_MAGIC_FEA   0x00195612 /* fs_featurebits supported */
 116 #define UFS_CIGAM_FEA   0x12561900
 117
 118 #define UFS_MAGIC_4GB   0x05231994 /* fs > 4 GB && fs_featurebits */
 119 #define UFS_CIGAM_4GB   0x94192305
 120
 121 /* Seems somebody at HP goofed here. B1 and lfs are both 0x2 !?! */
 122 #define UFS_FSF_LFN     0x00000001 /* long file names */
 123 #define UFS_FSF_B1      0x00000002 /* B1 security */
 124 #define UFS_FSF_LFS     0x00000002 /* large files */
 125 #define UFS_FSF_LUID    0x00000004 /* large UIDs */
 126
 127 /* End of HP stuff */
 128
 129
 130 #define UFS_BSIZE       8192
 131 #define UFS_MINBSIZE    4096
 132 #define UFS_FSIZE       1024
 133 #define UFS_MAXFRAG     (UFS_BSIZE / UFS_FSIZE)
 134
 135 #define UFS_NDADDR 12
 136 #define UFS_NINDIR 3
 137
 138 #define UFS_IND_BLOCK   (UFS_NDADDR + 0)
 139 #define UFS_DIND_BLOCK  (UFS_NDADDR + 1)
 140 #define UFS_TIND_BLOCK  (UFS_NDADDR + 2)
 141
 142 #define UFS_NDIR_FRAGMENT (UFS_NDADDR << uspi->s_fpbshift)
 143 #define UFS_IND_FRAGMENT (UFS_IND_BLOCK << uspi->s_fpbshift)
 144 #define UFS_DIND_FRAGMENT (UFS_DIND_BLOCK << uspi->s_fpbshift)
 145 #define UFS_TIND_FRAGMENT (UFS_TIND_BLOCK << uspi->s_fpbshift)
 146
 147 #define UFS_ROOTINO 2
 148 #define UFS_FIRST_INO (UFS_ROOTINO + 1)
 149
 150 #define UFS_USEEFT  ((__u16)65535)
 151
 152 #define UFS_FSOK      0x7c269d38
 153 #define UFS_FSACTIVE  ((__s8)0x00)
 154 #define UFS_FSCLEAN   ((__s8)0x01)
 155 #define UFS_FSSTABLE  ((__s8)0x02)
 156 #define UFS_FSOSF1    ((__s8)0x03)      /* is this correct for DEC OSF/1? */
 157 #define UFS_FSBAD     ((__s8)0xff)
 158
 159 /* From here to next blank line, s_flags for ufs_sb_info */
 160 /* directory entry encoding */
 161 #define UFS_DE_MASK             0x00000010      /* mask for the following */
 162 #define UFS_DE_OLD              0x00000000
 163 #define UFS_DE_44BSD            0x00000010
 164 /* uid encoding */
 165 #define UFS_UID_MASK            0x00000060      /* mask for the following */
 166 #define UFS_UID_OLD             0x00000000
 167 #define UFS_UID_44BSD           0x00000020
 168 #define UFS_UID_EFT             0x00000040
 169 /* superblock state encoding */
 170 #define UFS_ST_MASK             0x00000700      /* mask for the following */
 171 #define UFS_ST_OLD              0x00000000
 172 #define UFS_ST_44BSD            0x00000100
 173 #define UFS_ST_SUN              0x00000200
 174 #define UFS_ST_SUNx86           0x00000400
 175 /*cylinder group encoding */
 176 #define UFS_CG_MASK             0x00003000      /* mask for the following */
 177 #define UFS_CG_OLD              0x00000000
 178 #define UFS_CG_44BSD            0x00002000
 179 #define UFS_CG_SUN              0x00001000
 180 /* filesystem type encoding */
 181 #define UFS_TYPE_MASK           0x00010000      /* mask for the following */
 182 #define UFS_TYPE_UFS1           0x00000000
 183 #define UFS_TYPE_UFS2           0x00010000
 184
 185
 186 /* fs_inodefmt options */
 187 #define UFS_42INODEFMT  -1
 188 #define UFS_44INODEFMT  2
 189
 190 /* mount options */
 191 #define UFS_MOUNT_ONERROR               0x0000000F
 192 #define UFS_MOUNT_ONERROR_PANIC         0x00000001
 193 #define UFS_MOUNT_ONERROR_LOCK          0x00000002
 194 #define UFS_MOUNT_ONERROR_UMOUNT        0x00000004
 195 #define UFS_MOUNT_ONERROR_REPAIR        0x00000008
 196
 197 #define UFS_MOUNT_UFSTYPE               0x0000FFF0
 198 #define UFS_MOUNT_UFSTYPE_OLD           0x00000010
 199 #define UFS_MOUNT_UFSTYPE_44BSD         0x00000020
 200 #define UFS_MOUNT_UFSTYPE_SUN           0x00000040
 201 #define UFS_MOUNT_UFSTYPE_NEXTSTEP      0x00000080
 202 #define UFS_MOUNT_UFSTYPE_NEXTSTEP_CD   0x00000100
 203 #define UFS_MOUNT_UFSTYPE_OPENSTEP      0x00000200
 204 #define UFS_MOUNT_UFSTYPE_SUNx86        0x00000400
 205 #define UFS_MOUNT_UFSTYPE_HP            0x00000800
 206 #define UFS_MOUNT_UFSTYPE_UFS2          0x00001000
 207
 208 #define ufs_clear_opt(o,opt)    o &= ~UFS_MOUNT_##opt
 209 #define ufs_set_opt(o,opt)      o |= UFS_MOUNT_##opt
 210 #define ufs_test_opt(o,opt)     ((o) & UFS_MOUNT_##opt)
 211
 212 /*
 213  * MINFREE gives the minimum acceptable percentage of file system
 214  * blocks which may be free. If the freelist drops below this level
 215  * only the superuser may continue to allocate blocks. This may
 216  * be set to 0 if no reserve of free blocks is deemed necessary,
 217  * however throughput drops by fifty percent if the file system
 218  * is run at between 95% and 100% full; thus the minimum default
 219  * value of fs_minfree is 5%. However, to get good clustering
 220  * performance, 10% is a better choice. hence we use 10% as our
 221  * default value. With 10% free space, fragmentation is not a
 222  * problem, so we choose to optimize for time.
 223  */
 224 #define UFS_MINFREE         5
 225 #define UFS_DEFAULTOPT      UFS_OPTTIME
 226
 227 /*
 228  * Debug code
 229  */
 230 #ifdef CONFIG_UFS_DEBUG
 231 #       define UFSD(f, a...)    {                                       \
 232                 printk ("UFSD (%s, %d): %s:",                           \
 233                         __FILE__, __LINE__, __FUNCTION__);              \
 234                 printk (f, ## a);                                       \
 235         }
 236 #else
 237 #       define UFSD(f, a...)    /**/
 238 #endif
 239
 240 /*
 241  * Turn file system block numbers into disk block addresses.
 242  * This maps file system blocks to device size blocks.
 243  */
 244 #define ufs_fsbtodb(uspi, b)    ((b) << (uspi)->s_fsbtodb)
 245 #define ufs_dbtofsb(uspi, b)    ((b) >> (uspi)->s_fsbtodb)
 246
 247 /*
 248  * Cylinder group macros to locate things in cylinder groups.
 249  * They calc file system addresses of cylinder group data structures.
 250  */
 251 #define ufs_cgbase(c)   (uspi->s_fpg * (c))
 252 #define ufs_cgstart(c)  ((uspi)->fs_magic == UFS2_MAGIC ?  ufs_cgbase(c) : \
 253         (ufs_cgbase(c)  + uspi->s_cgoffset * ((c) & ~uspi->s_cgmask)))
 254 #define ufs_cgsblock(c) (ufs_cgstart(c) + uspi->s_sblkno)       /* super blk */
 255 #define ufs_cgcmin(c)   (ufs_cgstart(c) + uspi->s_cblkno)       /* cg block */
 256 #define ufs_cgimin(c)   (ufs_cgstart(c) + uspi->s_iblkno)       /* inode blk */
 257 #define ufs_cgdmin(c)   (ufs_cgstart(c) + uspi->s_dblkno)       /* 1st data */
 258
 259 /*
 260  * Macros for handling inode numbers:
 261  *     inode number to file system block offset.
 262  *     inode number to cylinder group number.
 263  *     inode number to file system block address.
 264  */
 265 #define ufs_inotocg(x)          ((x) / uspi->s_ipg)
 266 #define ufs_inotocgoff(x)       ((x) % uspi->s_ipg)
 267 #define ufs_inotofsba(x)        (((u64)ufs_cgimin(ufs_inotocg(x))) + ufs_inotocgoff(x) / uspi->s_inopf)
 268 #define ufs_inotofsbo(x)        ((x) % uspi->s_inopf)
 269
 270 /*
 271  * Compute the cylinder and rotational position of a cyl block addr.
 272  */
 273 #define ufs_cbtocylno(bno) \
 274         ((bno) * uspi->s_nspf / uspi->s_spc)
 275 #define ufs_cbtorpos(bno) \
 276         ((((bno) * uspi->s_nspf % uspi->s_spc / uspi->s_nsect \
 277         * uspi->s_trackskew + (bno) * uspi->s_nspf % uspi->s_spc \
 278         % uspi->s_nsect * uspi->s_interleave) % uspi->s_nsect \
 279         * uspi->s_nrpos) / uspi->s_npsect)
 280
 281 /*
 282  * The following macros optimize certain frequently calculated
 283  * quantities by using shifts and masks in place of divisions
 284  * modulos and multiplications.
 285  */
 286 #define ufs_blkoff(loc)         ((loc) & uspi->s_qbmask)
 287 #define ufs_fragoff(loc)        ((loc) & uspi->s_qfmask)
 288 #define ufs_lblktosize(blk)     ((blk) << uspi->s_bshift)
 289 #define ufs_lblkno(loc)         ((loc) >> uspi->s_bshift)
 290 #define ufs_numfrags(loc)       ((loc) >> uspi->s_fshift)
 291 #define ufs_blkroundup(size)    (((size) + uspi->s_qbmask) & uspi->s_bmask)
 292 #define ufs_fragroundup(size)   (((size) + uspi->s_qfmask) & uspi->s_fmask)
 293 #define ufs_fragstoblks(frags)  ((frags) >> uspi->s_fpbshift)
 294 #define ufs_blkstofrags(blks)   ((blks) << uspi->s_fpbshift)
 295 #define ufs_fragnum(fsb)        ((fsb) & uspi->s_fpbmask)
 296 #define ufs_blknum(fsb)         ((fsb) & ~uspi->s_fpbmask)
 297
 298 #define UFS_MAXNAMLEN 255
 299 #define UFS_MAXMNTLEN 512
 300 #define UFS2_MAXMNTLEN 468
 301 #define UFS2_MAXVOLLEN 32
 302 #define UFS_MAXCSBUFS 31
 303 #define UFS_LINK_MAX 32000
 304 /*
 305 #define UFS2_NOCSPTRS   ((128 / sizeof(void *)) - 4)
 306 */
 307 #define UFS2_NOCSPTRS   28
 308
 309 /*
 310  * UFS_DIR_PAD defines the directory entries boundaries
 311  * (must be a multiple of 4)
 312  */
 313 #define UFS_DIR_PAD                     4
 314 #define UFS_DIR_ROUND                   (UFS_DIR_PAD - 1)
 315 #define UFS_DIR_REC_LEN(name_len)       (((name_len) + 1 + 8 + UFS_DIR_ROUND) & ~UFS_DIR_ROUND)
 316
 317 struct ufs_timeval {
 318         __fs32  tv_sec;
 319         __fs32  tv_usec;
 320 };
 321
 322 struct ufs_dir_entry {
 323         __fs32  d_ino;                  /* inode number of this entry */
 324         __fs16  d_reclen;               /* length of this entry */
 325         union {
 326                 __fs16  d_namlen;               /* actual length of d_name */
 327                 struct {
 328                         __u8    d_type;         /* file type */
 329                         __u8    d_namlen;       /* length of string in d_name */
 330                 } d_44;
 331         } d_u;
 332         __u8    d_name[UFS_MAXNAMLEN + 1];      /* file name */
 333 };
 334
 335 struct ufs_csum {
 336         __fs32  cs_ndir;        /* number of directories */
 337         __fs32  cs_nbfree;      /* number of free blocks */
 338         __fs32  cs_nifree;      /* number of free inodes */
 339         __fs32  cs_nffree;      /* number of free frags */
 340 };
 341 struct ufs2_csum_total {
 342         __fs64  cs_ndir;        /* number of directories */
 343         __fs64  cs_nbfree;      /* number of free blocks */
 344         __fs64  cs_nifree;      /* number of free inodes */
 345         __fs64  cs_nffree;      /* number of free frags */
 346         __fs64   cs_numclusters;        /* number of free clusters */
 347         __fs64   cs_spare[3];   /* future expansion */
 348 };
 349
 350 struct ufs_csum_core {
 351         __u64   cs_ndir;        /* number of directories */
 352         __u64   cs_nbfree;      /* number of free blocks */
 353         __u64   cs_nifree;      /* number of free inodes */
 354         __u64   cs_nffree;      /* number of free frags */
 355         __u64   cs_numclusters; /* number of free clusters */
 356 };
 357
 358 /*
 359  * File system flags
 360  */
 361 #define UFS_UNCLEAN      0x01    /* file system not clean at mount (unused) */
 362 #define UFS_DOSOFTDEP    0x02    /* file system using soft dependencies */
 363 #define UFS_NEEDSFSCK    0x04    /* needs sync fsck (FreeBSD compat, unused) */
 364 #define UFS_INDEXDIRS    0x08    /* kernel supports indexed directories */
 365 #define UFS_ACLS         0x10    /* file system has ACLs enabled */
 366 #define UFS_MULTILABEL   0x20    /* file system is MAC multi-label */
 367 #define UFS_FLAGS_UPDATED 0x80   /* flags have been moved to new location */
 368
 369 #if 0
 370 /*
 371  * This is the actual superblock, as it is laid out on the disk.
 372  * Do NOT use this structure, because of sizeof(ufs_super_block) > 512 and
 373  * it may occupy several blocks, use
 374  * struct ufs_super_block_(first,second,third) instead.
 375  */
 376 struct ufs_super_block {
 377         __fs32  fs_link;        /* UNUSED */
 378         __fs32  fs_rlink;       /* UNUSED */
 379         __fs32  fs_sblkno;      /* addr of super-block in filesys */
 380         __fs32  fs_cblkno;      /* offset of cyl-block in filesys */
 381         __fs32  fs_iblkno;      /* offset of inode-blocks in filesys */
 382         __fs32  fs_dblkno;      /* offset of first data after cg */
 383         __fs32  fs_cgoffset;    /* cylinder group offset in cylinder */
 384         __fs32  fs_cgmask;      /* used to calc mod fs_ntrak */
 385         __fs32  fs_time;        /* last time written -- time_t */
 386         __fs32  fs_size;        /* number of blocks in fs */
 387         __fs32  fs_dsize;       /* number of data blocks in fs */
 388         __fs32  fs_ncg;         /* number of cylinder groups */
 389         __fs32  fs_bsize;       /* size of basic blocks in fs */
 390         __fs32  fs_fsize;       /* size of frag blocks in fs */
 391         __fs32  fs_frag;        /* number of frags in a block in fs */
 392 /* these are configuration parameters */
 393         __fs32  fs_minfree;     /* minimum percentage of free blocks */
 394         __fs32  fs_rotdelay;    /* num of ms for optimal next block */
 395         __fs32  fs_rps;         /* disk revolutions per second */
 396 /* these fields can be computed from the others */
 397         __fs32  fs_bmask;       /* ``blkoff'' calc of blk offsets */
 398         __fs32  fs_fmask;       /* ``fragoff'' calc of frag offsets */
 399         __fs32  fs_bshift;      /* ``lblkno'' calc of logical blkno */
 400         __fs32  fs_fshift;      /* ``numfrags'' calc number of frags */
 401 /* these are configuration parameters */
 402         __fs32  fs_maxcontig;   /* max number of contiguous blks */
 403         __fs32  fs_maxbpg;      /* max number of blks per cyl group */
 404 /* these fields can be computed from the others */
 405         __fs32  fs_fragshift;   /* block to frag shift */
 406         __fs32  fs_fsbtodb;     /* fsbtodb and dbtofsb shift constant */
 407         __fs32  fs_sbsize;      /* actual size of super block */
 408         __fs32  fs_csmask;      /* csum block offset */
 409         __fs32  fs_csshift;     /* csum block number */
 410         __fs32  fs_nindir;      /* value of NINDIR */
 411         __fs32  fs_inopb;       /* value of INOPB */
 412         __fs32  fs_nspf;        /* value of NSPF */
 413 /* yet another configuration parameter */
 414         __fs32  fs_optim;       /* optimization preference, see below */
 415 /* these fields are derived from the hardware */
 416         union {
 417                 struct {
 418                         __fs32  fs_npsect;      /* # sectors/track including spares */
 419                 } fs_sun;
 420                 struct {
 421                         __fs32  fs_state;       /* file system state time stamp */
 422                 } fs_sunx86;
 423         } fs_u1;
 424         __fs32  fs_interleave;  /* hardware sector interleave */
 425         __fs32  fs_trackskew;   /* sector 0 skew, per track */
 426 /* a unique id for this filesystem (currently unused and unmaintained) */
 427 /* In 4.3 Tahoe this space is used by fs_headswitch and fs_trkseek */
 428 /* Neither of those fields is used in the Tahoe code right now but */
 429 /* there could be problems if they are.                            */
 430         __fs32  fs_id[2];       /* file system id */
 431 /* sizes determined by number of cylinder groups and their sizes */
 432         __fs32  fs_csaddr;      /* blk addr of cyl grp summary area */
 433         __fs32  fs_cssize;      /* size of cyl grp summary area */
 434         __fs32  fs_cgsize;      /* cylinder group size */
 435 /* these fields are derived from the hardware */
 436         __fs32  fs_ntrak;       /* tracks per cylinder */
 437         __fs32  fs_nsect;       /* sectors per track */
 438         __fs32  fs_spc;         /* sectors per cylinder */
 439 /* this comes from the disk driver partitioning */
 440         __fs32  fs_ncyl;        /* cylinders in file system */
 441 /* these fields can be computed from the others */
 442         __fs32  fs_cpg;         /* cylinders per group */
 443         __fs32  fs_ipg;         /* inodes per cylinder group */
 444         __fs32  fs_fpg;         /* blocks per group * fs_frag */
 445 /* this data must be re-computed after crashes */
 446         struct ufs_csum fs_cstotal;     /* cylinder summary information */
 447 /* these fields are cleared at mount time */
 448         __s8    fs_fmod;        /* super block modified flag */
 449         __s8    fs_clean;       /* file system is clean flag */
 450         __s8    fs_ronly;       /* mounted read-only flag */
 451         __s8    fs_flags;
 452         union {
 453                 struct {
 454                         __s8    fs_fsmnt[UFS_MAXMNTLEN];/* name mounted on */
 455                         __fs32  fs_cgrotor;     /* last cg searched */
 456                         __fs32  fs_csp[UFS_MAXCSBUFS];/*list of fs_cs info buffers */
 457                         __fs32  fs_maxcluster;
 458                         __fs32  fs_cpc;         /* cyl per cycle in postbl */
 459                         __fs16  fs_opostbl[16][8]; /* old rotation block list head */
 460                 } fs_u1;
 461                 struct {
 462                         __s8  fs_fsmnt[UFS2_MAXMNTLEN]; /* name mounted on */
 463                         __u8   fs_volname[UFS2_MAXVOLLEN]; /* volume name */
 464                         __fs64  fs_swuid;               /* system-wide uid */
 465                         __fs32  fs_pad; /* due to alignment of fs_swuid */
 466                         __fs32   fs_cgrotor;     /* last cg searched */
 467                         __fs32   fs_ocsp[UFS2_NOCSPTRS]; /*list of fs_cs info buffers */
 468                         __fs32   fs_contigdirs;/*# of contiguously allocated dirs */
 469                         __fs32   fs_csp;        /* cg summary info buffer for fs_cs */
 470                         __fs32   fs_maxcluster;
 471                         __fs32   fs_active;/* used by snapshots to track fs */
 472                         __fs32   fs_old_cpc;    /* cyl per cycle in postbl */
 473                         __fs32   fs_maxbsize;/*maximum blocking factor permitted */
 474                         __fs64   fs_sparecon64[17];/*old rotation block list head */
 475                         __fs64   fs_sblockloc; /* byte offset of standard superblock */
 476                         struct  ufs2_csum_total fs_cstotal;/*cylinder summary information*/
 477                         struct  ufs_timeval    fs_time;         /* last time written */
 478                         __fs64    fs_size;              /* number of blocks in fs */
 479                         __fs64    fs_dsize;     /* number of data blocks in fs */
 480                         __fs64   fs_csaddr;     /* blk addr of cyl grp summary area */
 481                         __fs64    fs_pendingblocks;/* blocks in process of being freed */
 482                         __fs32    fs_pendinginodes;/*inodes in process of being freed */
 483                 } fs_u2;
 484         }  fs_u11;
 485         union {
 486                 struct {
 487                         __fs32  fs_sparecon[53];/* reserved for future constants */
 488                         __fs32  fs_reclaim;
 489                         __fs32  fs_sparecon2[1];
 490                         __fs32  fs_state;       /* file system state time stamp */
 491                         __fs32  fs_qbmask[2];   /* ~usb_bmask */
 492                         __fs32  fs_qfmask[2];   /* ~usb_fmask */
 493                 } fs_sun;
 494                 struct {
 495                         __fs32  fs_sparecon[53];/* reserved for future constants */
 496                         __fs32  fs_reclaim;
 497                         __fs32  fs_sparecon2[1];
 498                         __fs32  fs_npsect;      /* # sectors/track including spares */
 499                         __fs32  fs_qbmask[2];   /* ~usb_bmask */
 500                         __fs32  fs_qfmask[2];   /* ~usb_fmask */
 501                 } fs_sunx86;
 502                 struct {
 503                         __fs32  fs_sparecon[50];/* reserved for future constants */
 504                         __fs32  fs_contigsumsize;/* size of cluster summary array */
 505                         __fs32  fs_maxsymlinklen;/* max length of an internal symlink */
 506                         __fs32  fs_inodefmt;    /* format of on-disk inodes */
 507                         __fs32  fs_maxfilesize[2];      /* max representable file size */
 508                         __fs32  fs_qbmask[2];   /* ~usb_bmask */
 509                         __fs32  fs_qfmask[2];   /* ~usb_fmask */
 510                         __fs32  fs_state;       /* file system state time stamp */
 511                 } fs_44;
 512         } fs_u2;
 513         __fs32  fs_postblformat;        /* format of positional layout tables */
 514         __fs32  fs_nrpos;               /* number of rotational positions */
 515         __fs32  fs_postbloff;           /* (__s16) rotation block list head */
 516         __fs32  fs_rotbloff;            /* (__u8) blocks for each rotation */
 517         __fs32  fs_magic;               /* magic number */
 518         __u8    fs_space[1];            /* list of blocks for each rotation */
 519 };
 520 #endif/*struct ufs_super_block*/
 521
 522 /*
 523  * Preference for optimization.
 524  */
 525 #define UFS_OPTTIME     0       /* minimize allocation time */
 526 #define UFS_OPTSPACE    1       /* minimize disk fragmentation */
 527
 528 /*
 529  * Rotational layout table format types
 530  */
 531 #define UFS_42POSTBLFMT         -1      /* 4.2BSD rotational table format */
 532 #define UFS_DYNAMICPOSTBLFMT    1       /* dynamic rotational table format */
 533
 534 /*
 535  * Convert cylinder group to base address of its global summary info.
 536  */
 537 #define fs_cs(indx) s_csp[(indx)]
 538
 539 /*
 540  * Cylinder group block for a file system.
 541  *
 542  * Writable fields in the cylinder group are protected by the associated
 543  * super block lock fs->fs_lock.
 544  */
 545 #define CG_MAGIC        0x090255
 546 #define ufs_cg_chkmagic(sb, ucg) \
 547         (fs32_to_cpu((sb), (ucg)->cg_magic) == CG_MAGIC)
 548
 549 /*
 550  * size of this structure is 172 B
 551  */
 552 struct  ufs_cylinder_group {
 553         __fs32  cg_link;                /* linked list of cyl groups */
 554         __fs32  cg_magic;               /* magic number */
 555         __fs32  cg_time;                /* time last written */
 556         __fs32  cg_cgx;                 /* we are the cgx'th cylinder group */
 557         __fs16  cg_ncyl;                /* number of cyl's this cg */
 558         __fs16  cg_niblk;               /* number of inode blocks this cg */
 559         __fs32  cg_ndblk;               /* number of data blocks this cg */
 560         struct  ufs_csum cg_cs;         /* cylinder summary information */
 561         __fs32  cg_rotor;               /* position of last used block */
 562         __fs32  cg_frotor;              /* position of last used frag */
 563         __fs32  cg_irotor;              /* position of last used inode */
 564         __fs32  cg_frsum[UFS_MAXFRAG];  /* counts of available frags */
 565         __fs32  cg_btotoff;             /* (__u32) block totals per cylinder */
 566         __fs32  cg_boff;                /* (short) free block positions */
 567         __fs32  cg_iusedoff;            /* (char) used inode map */
 568         __fs32  cg_freeoff;             /* (u_char) free block map */
 569         __fs32  cg_nextfreeoff;         /* (u_char) next available space */
 570         union {
 571                 struct {
 572                         __fs32  cg_clustersumoff;       /* (u_int32) counts of avail clusters */
 573                         __fs32  cg_clusteroff;          /* (u_int8) free cluster map */
 574                         __fs32  cg_nclusterblks;        /* number of clusters this cg */
 575                         __fs32  cg_sparecon[13];        /* reserved for future use */
 576                 } cg_44;
 577                 struct {
 578                         __fs32  cg_clustersumoff;/* (u_int32) counts of avail clusters */
 579                         __fs32  cg_clusteroff;  /* (u_int8) free cluster map */
 580                         __fs32  cg_nclusterblks;/* number of clusters this cg */
 581                         __fs32   cg_niblk; /* number of inode blocks this cg */
 582                         __fs32   cg_initediblk; /* last initialized inode */
 583                         __fs32   cg_sparecon32[3];/* reserved for future use */
 584                         __fs64   cg_time;       /* time last written */
 585                         __fs64  cg_sparecon[3]; /* reserved for future use */
 586                 } cg_u2;
 587                 __fs32  cg_sparecon[16];        /* reserved for future use */
 588         } cg_u;
 589         __u8    cg_space[1];            /* space for cylinder group maps */
 590 /* actually longer */
 591 };
 592
 593 /*
 594  * structure of an on-disk inode
 595  */
 596 struct ufs_inode {
 597         __fs16  ui_mode;                /*  0x0 */
 598         __fs16  ui_nlink;               /*  0x2 */
 599         union {
 600                 struct {
 601                         __fs16  ui_suid;        /*  0x4 */
 602                         __fs16  ui_sgid;        /*  0x6 */
 603                 } oldids;
 604                 __fs32  ui_inumber;             /*  0x4 lsf: inode number */
 605                 __fs32  ui_author;              /*  0x4 GNU HURD: author */
 606         } ui_u1;
 607         __fs64  ui_size;                /*  0x8 */
 608         struct ufs_timeval ui_atime;    /* 0x10 access */
 609         struct ufs_timeval ui_mtime;    /* 0x18 modification */
 610         struct ufs_timeval ui_ctime;    /* 0x20 creation */
 611         union {
 612                 struct {
 613                         __fs32  ui_db[UFS_NDADDR];/* 0x28 data blocks */
 614                         __fs32  ui_ib[UFS_NINDIR];/* 0x58 indirect blocks */
 615                 } ui_addr;
 616                 __u8    ui_symlink[4*(UFS_NDADDR+UFS_NINDIR)];/* 0x28 fast symlink */
 617         } ui_u2;
 618         __fs32  ui_flags;               /* 0x64 immutable, append-only... */
 619         __fs32  ui_blocks;              /* 0x68 blocks in use */
 620         __fs32  ui_gen;                 /* 0x6c like ext2 i_version, for NFS support */
 621         union {
 622                 struct {
 623                         __fs32  ui_shadow;      /* 0x70 shadow inode with security data */
 624                         __fs32  ui_uid;         /* 0x74 long EFT version of uid */
 625                         __fs32  ui_gid;         /* 0x78 long EFT version of gid */
 626                         __fs32  ui_oeftflag;    /* 0x7c reserved */
 627                 } ui_sun;
 628                 struct {
 629                         __fs32  ui_uid;         /* 0x70 File owner */
 630                         __fs32  ui_gid;         /* 0x74 File group */
 631                         __fs32  ui_spare[2];    /* 0x78 reserved */
 632                 } ui_44;
 633                 struct {
 634                         __fs32  ui_uid;         /* 0x70 */
 635                         __fs32  ui_gid;         /* 0x74 */
 636                         __fs16  ui_modeh;       /* 0x78 mode high bits */
 637                         __fs16  ui_spare;       /* 0x7A unused */
 638                         __fs32  ui_trans;       /* 0x7c filesystem translator */
 639                 } ui_hurd;
 640         } ui_u3;
 641 };
 642
 643 #define UFS_NXADDR  2            /* External addresses in inode. */
 644 struct ufs2_inode {
 645         __fs16     ui_mode;        /*   0: IFMT, permissions; see below. */
 646         __fs16     ui_nlink;       /*   2: File link count. */
 647         __fs32     ui_uid;         /*   4: File owner. */
 648         __fs32     ui_gid;         /*   8: File group. */
 649         __fs32     ui_blksize;     /*  12: Inode blocksize. */
 650         __fs64     ui_size;        /*  16: File byte count. */
 651         __fs64     ui_blocks;      /*  24: Bytes actually held. */
 652         __fs64   ui_atime;       /*  32: Last access time. */
 653         __fs64   ui_mtime;       /*  40: Last modified time. */
 654         __fs64   ui_ctime;       /*  48: Last inode change time. */
 655         __fs64   ui_birthtime;   /*  56: Inode creation time. */
 656         __fs32     ui_mtimensec;   /*  64: Last modified time. */
 657         __fs32     ui_atimensec;   /*  68: Last access time. */
 658         __fs32     ui_ctimensec;   /*  72: Last inode change time. */
 659         __fs32     ui_birthnsec;   /*  76: Inode creation time. */
 660         __fs32     ui_gen;         /*  80: Generation number. */
 661         __fs32     ui_kernflags;   /*  84: Kernel flags. */
 662         __fs32     ui_flags;       /*  88: Status flags (chflags). */
 663         __fs32     ui_extsize;     /*  92: External attributes block. */
 664         __fs64     ui_extb[UFS_NXADDR];/*  96: External attributes block. */
 665         union {
 666                 struct {
 667                         __fs64     ui_db[UFS_NDADDR]; /* 112: Direct disk blocks. */
 668                         __fs64     ui_ib[UFS_NINDIR];/* 208: Indirect disk blocks.*/
 669                 } ui_addr;
 670         __u8    ui_symlink[2*4*(UFS_NDADDR+UFS_NINDIR)];/* 0x28 fast symlink */
 671         } ui_u2;
 672         __fs64     ui_spare[3];    /* 232: Reserved; currently unused */
 673 };
 674
 675
 676 /* FreeBSD has these in sys/stat.h */
 677 /* ui_flags that can be set by a file owner */
 678 #define UFS_UF_SETTABLE   0x0000ffff
 679 #define UFS_UF_NODUMP     0x00000001  /* do not dump */
 680 #define UFS_UF_IMMUTABLE  0x00000002  /* immutable (can't "change") */
 681 #define UFS_UF_APPEND     0x00000004  /* append-only */
 682 #define UFS_UF_OPAQUE     0x00000008  /* directory is opaque (unionfs) */
 683 #define UFS_UF_NOUNLINK   0x00000010  /* can't be removed or renamed */
 684 /* ui_flags that only root can set */
 685 #define UFS_SF_SETTABLE   0xffff0000
 686 #define UFS_SF_ARCHIVED   0x00010000  /* archived */
 687 #define UFS_SF_IMMUTABLE  0x00020000  /* immutable (can't "change") */
 688 #define UFS_SF_APPEND     0x00040000  /* append-only */
 689 #define UFS_SF_NOUNLINK   0x00100000  /* can't be removed or renamed */
 690
 691 /*
 692  * This structure is used for reading disk structures larger
 693  * than the size of fragment.
 694  */
 695 struct ufs_buffer_head {
 696         __u64 fragment;                 /* first fragment */
 697         __u64 count;                            /* number of fragments */
 698         struct buffer_head * bh[UFS_MAXFRAG];   /* buffers */
 699 };
 700
 701 struct ufs_cg_private_info {
 702         struct ufs_buffer_head c_ubh;
 703         __u32   c_cgx;          /* number of cylidner group */
 704         __u16   c_ncyl;         /* number of cyl's this cg */
 705         __u16   c_niblk;        /* number of inode blocks this cg */
 706         __u32   c_ndblk;        /* number of data blocks this cg */
 707         __u32   c_rotor;        /* position of last used block */
 708         __u32   c_frotor;       /* position of last used frag */
 709         __u32   c_irotor;       /* position of last used inode */
 710         __u32   c_btotoff;      /* (__u32) block totals per cylinder */
 711         __u32   c_boff;         /* (short) free block positions */
 712         __u32   c_iusedoff;     /* (char) used inode map */
 713         __u32   c_freeoff;      /* (u_char) free block map */
 714         __u32   c_nextfreeoff;  /* (u_char) next available space */
 715         __u32   c_clustersumoff;/* (u_int32) counts of avail clusters */
 716         __u32   c_clusteroff;   /* (u_int8) free cluster map */
 717         __u32   c_nclusterblks; /* number of clusters this cg */
 718 };
 719
 720
 721 struct ufs_sb_private_info {
 722         struct ufs_buffer_head s_ubh; /* buffer containing super block */
 723         struct ufs_csum_core cs_total;
 724         __u32   s_sblkno;       /* offset of super-blocks in filesys */
 725         __u32   s_cblkno;       /* offset of cg-block in filesys */
 726         __u32   s_iblkno;       /* offset of inode-blocks in filesys */
 727         __u32   s_dblkno;       /* offset of first data after cg */
 728         __u32   s_cgoffset;     /* cylinder group offset in cylinder */
 729         __u32   s_cgmask;       /* used to calc mod fs_ntrak */
 730         __u32   s_size;         /* number of blocks (fragments) in fs */
 731         __u32   s_dsize;        /* number of data blocks in fs */
 732         __u64   s_u2_size;      /* ufs2: number of blocks (fragments) in fs */
 733         __u64   s_u2_dsize;     /*ufs2:  number of data blocks in fs */
 734         __u32   s_ncg;          /* number of cylinder groups */
 735         __u32   s_bsize;        /* size of basic blocks */
 736         __u32   s_fsize;        /* size of fragments */
 737         __u32   s_fpb;          /* fragments per block */
 738         __u32   s_minfree;      /* minimum percentage of free blocks */
 739         __u32   s_bmask;        /* `blkoff'' calc of blk offsets */
 740         __u32   s_fmask;        /* s_fsize mask */
 741         __u32   s_bshift;       /* `lblkno'' calc of logical blkno */
 742         __u32   s_fshift;       /* s_fsize shift */
 743         __u32   s_fpbshift;     /* fragments per block shift */
 744         __u32   s_fsbtodb;      /* fsbtodb and dbtofsb shift constant */
 745         __u32   s_sbsize;       /* actual size of super block */
 746         __u32   s_csmask;       /* csum block offset */
 747         __u32   s_csshift;      /* csum block number */
 748         __u32   s_nindir;       /* value of NINDIR */
 749         __u32   s_inopb;        /* value of INOPB */
 750         __u32   s_nspf;         /* value of NSPF */
 751         __u32   s_npsect;       /* # sectors/track including spares */
 752         __u32   s_interleave;   /* hardware sector interleave */
 753         __u32   s_trackskew;    /* sector 0 skew, per track */
 754         __u64   s_csaddr;       /* blk addr of cyl grp summary area */
 755         __u32   s_cssize;       /* size of cyl grp summary area */
 756         __u32   s_cgsize;       /* cylinder group size */
 757         __u32   s_ntrak;        /* tracks per cylinder */
 758         __u32   s_nsect;        /* sectors per track */
 759         __u32   s_spc;          /* sectors per cylinder */
 760         __u32   s_ipg;          /* inodes per cylinder group */
 761         __u32   s_fpg;          /* fragments per group */
 762         __u32   s_cpc;          /* cyl per cycle in postbl */
 763         __s32   s_contigsumsize;/* size of cluster summary array, 44bsd */
 764         __s64   s_qbmask;       /* ~usb_bmask */
 765         __s64   s_qfmask;       /* ~usb_fmask */
 766         __s32   s_postblformat; /* format of positional layout tables */
 767         __s32   s_nrpos;        /* number of rotational positions */
 768         __s32   s_postbloff;    /* (__s16) rotation block list head */
 769         __s32   s_rotbloff;     /* (__u8) blocks for each rotation */
 770
 771         __u32   s_fpbmask;      /* fragments per block mask */
 772         __u32   s_apb;          /* address per block */
 773         __u32   s_2apb;         /* address per block^2 */
 774         __u32   s_3apb;         /* address per block^3 */
 775         __u32   s_apbmask;      /* address per block mask */
 776         __u32   s_apbshift;     /* address per block shift */
 777         __u32   s_2apbshift;    /* address per block shift * 2 */
 778         __u32   s_3apbshift;    /* address per block shift * 3 */
 779         __u32   s_nspfshift;    /* number of sector per fragment shift */
 780         __u32   s_nspb;         /* number of sector per block */
 781         __u32   s_inopf;        /* inodes per fragment */
 782         __u32   s_sbbase;       /* offset of NeXTstep superblock */
 783         __u32   s_bpf;          /* bits per fragment */
 784         __u32   s_bpfshift;     /* bits per fragment shift*/
 785         __u32   s_bpfmask;      /* bits per fragment mask */
 786
 787         __u32   s_maxsymlinklen;/* upper limit on fast symlinks' size */
 788         __s32   fs_magic;       /* filesystem magic */
 789         unsigned int s_dirblksize;
 790 };
 791
 792 /*
 793  * Sizes of this structures are:
 794  *      ufs_super_block_first   512
 795  *      ufs_super_block_second  512
 796  *      ufs_super_block_third   356
 797  */
 798 struct ufs_super_block_first {
 799         __fs32  fs_link;
 800         __fs32  fs_rlink;
 801         __fs32  fs_sblkno;
 802         __fs32  fs_cblkno;
 803         __fs32  fs_iblkno;
 804         __fs32  fs_dblkno;
 805         __fs32  fs_cgoffset;
 806         __fs32  fs_cgmask;
 807         __fs32  fs_time;
 808         __fs32  fs_size;
 809         __fs32  fs_dsize;
 810         __fs32  fs_ncg;
 811         __fs32  fs_bsize;
 812         __fs32  fs_fsize;
 813         __fs32  fs_frag;
 814         __fs32  fs_minfree;
 815         __fs32  fs_rotdelay;
 816         __fs32  fs_rps;
 817         __fs32  fs_bmask;
 818         __fs32  fs_fmask;
 819         __fs32  fs_bshift;
 820         __fs32  fs_fshift;
 821         __fs32  fs_maxcontig;
 822         __fs32  fs_maxbpg;
 823         __fs32  fs_fragshift;
 824         __fs32  fs_fsbtodb;
 825         __fs32  fs_sbsize;
 826         __fs32  fs_csmask;
 827         __fs32  fs_csshift;
 828         __fs32  fs_nindir;
 829         __fs32  fs_inopb;
 830         __fs32  fs_nspf;
 831         __fs32  fs_optim;
 832         union {
 833                 struct {
 834                         __fs32  fs_npsect;
 835                 } fs_sun;
 836                 struct {
 837                         __fs32  fs_state;
 838                 } fs_sunx86;
 839         } fs_u1;
 840         __fs32  fs_interleave;
 841         __fs32  fs_trackskew;
 842         __fs32  fs_id[2];
 843         __fs32  fs_csaddr;
 844         __fs32  fs_cssize;
 845         __fs32  fs_cgsize;
 846         __fs32  fs_ntrak;
 847         __fs32  fs_nsect;
 848         __fs32  fs_spc;
 849         __fs32  fs_ncyl;
 850         __fs32  fs_cpg;
 851         __fs32  fs_ipg;
 852         __fs32  fs_fpg;
 853         struct ufs_csum fs_cstotal;
 854         __s8    fs_fmod;
 855         __s8    fs_clean;
 856         __s8    fs_ronly;
 857         __s8    fs_flags;
 858         __s8    fs_fsmnt[UFS_MAXMNTLEN - 212];
 859
 860 };
 861
 862 struct ufs_super_block_second {
 863         union {
 864                 struct {
 865                         __s8    fs_fsmnt[212];
 866                         __fs32  fs_cgrotor;
 867                         __fs32  fs_csp[UFS_MAXCSBUFS];
 868                         __fs32  fs_maxcluster;
 869                         __fs32  fs_cpc;
 870                         __fs16  fs_opostbl[82];
 871                 } fs_u1;
 872                 struct {
 873                         __s8  fs_fsmnt[UFS2_MAXMNTLEN - UFS_MAXMNTLEN + 212];
 874                         __u8   fs_volname[UFS2_MAXVOLLEN];
 875                         __fs64  fs_swuid;
 876                         __fs32  fs_pad;
 877                         __fs32   fs_cgrotor;
 878                         __fs32   fs_ocsp[UFS2_NOCSPTRS];
 879                         __fs32   fs_contigdirs;
 880                         __fs32   fs_csp;
 881                         __fs32   fs_maxcluster;
 882                         __fs32   fs_active;
 883                         __fs32   fs_old_cpc;
 884                         __fs32   fs_maxbsize;
 885                         __fs64   fs_sparecon64[17];
 886                         __fs64   fs_sblockloc;
 887                         __fs64  cs_ndir;
 888                         __fs64  cs_nbfree;
 889                 } fs_u2;
 890         } fs_un;
 891 };
 892
 893 struct ufs_super_block_third {
 894         union {
 895                 struct {
 896                         __fs16  fs_opostbl[46];
 897                 } fs_u1;
 898                 struct {
 899                         __fs64  cs_nifree;      /* number of free inodes */
 900                         __fs64  cs_nffree;      /* number of free frags */
 901                         __fs64   cs_numclusters;        /* number of free clusters */
 902                         __fs64   cs_spare[3];   /* future expansion */
 903                         struct  ufs_timeval    fs_time;         /* last time written */
 904                         __fs64    fs_size;              /* number of blocks in fs */
 905                         __fs64    fs_dsize;     /* number of data blocks in fs */
 906                         __fs64   fs_csaddr;     /* blk addr of cyl grp summary area */
 907                         __fs64    fs_pendingblocks;/* blocks in process of being freed */
 908                         __fs32    fs_pendinginodes;/*inodes in process of being freed */
 909                 } __attribute__ ((packed)) fs_u2;
 910         } fs_un1;
 911         union {
 912                 struct {
 913                         __fs32  fs_sparecon[53];/* reserved for future constants */
 914                         __fs32  fs_reclaim;
 915                         __fs32  fs_sparecon2[1];
 916                         __fs32  fs_state;       /* file system state time stamp */
 917                         __fs32  fs_qbmask[2];   /* ~usb_bmask */
 918                         __fs32  fs_qfmask[2];   /* ~usb_fmask */
 919                 } fs_sun;
 920                 struct {
 921                         __fs32  fs_sparecon[53];/* reserved for future constants */
 922                         __fs32  fs_reclaim;
 923                         __fs32  fs_sparecon2[1];
 924                         __fs32  fs_npsect;      /* # sectors/track including spares */
 925                         __fs32  fs_qbmask[2];   /* ~usb_bmask */
 926                         __fs32  fs_qfmask[2];   /* ~usb_fmask */
 927                 } fs_sunx86;
 928                 struct {
 929                         __fs32  fs_sparecon[50];/* reserved for future constants */
 930                         __fs32  fs_contigsumsize;/* size of cluster summary array */
 931                         __fs32  fs_maxsymlinklen;/* max length of an internal symlink */
 932                         __fs32  fs_inodefmt;    /* format of on-disk inodes */
 933                         __fs32  fs_maxfilesize[2];      /* max representable file size */
 934                         __fs32  fs_qbmask[2];   /* ~usb_bmask */
 935                         __fs32  fs_qfmask[2];   /* ~usb_fmask */
 936                         __fs32  fs_state;       /* file system state time stamp */
 937                 } fs_44;
 938         } fs_un2;
 939         __fs32  fs_postblformat;
 940         __fs32  fs_nrpos;
 941         __fs32  fs_postbloff;
 942         __fs32  fs_rotbloff;
 943         __fs32  fs_magic;
 944         __u8    fs_space[1];
 945 };
 946
 947 #ifdef __KERNEL__
 948
 949 /* balloc.c */
 950 extern void ufs_free_fragments (struct inode *, u64, unsigned);
 951 extern void ufs_free_blocks (struct inode *, u64, unsigned);
 952 extern u64 ufs_new_fragments(struct inode *, void *, u64, u64,
 953                              unsigned, int *, struct page *);
 954
 955 /* cylinder.c */
 956 extern struct ufs_cg_private_info * ufs_load_cylinder (struct super_block *, unsigned);
 957 extern void ufs_put_cylinder (struct super_block *, unsigned);
 958
 959 /* dir.c */
 960 extern const struct inode_operations ufs_dir_inode_operations;
 961 extern int ufs_add_link (struct dentry *, struct inode *);
 962 extern ino_t ufs_inode_by_name(struct inode *, struct dentry *);
 963 extern int ufs_make_empty(struct inode *, struct inode *);
 964 extern struct ufs_dir_entry *ufs_find_entry(struct inode *, struct dentry *, struct page **);
 965 extern int ufs_delete_entry(struct inode *, struct ufs_dir_entry *, struct page *);
 966 extern int ufs_empty_dir (struct inode *);
 967 extern struct ufs_dir_entry *ufs_dotdot(struct inode *, struct page **);
 968 extern void ufs_set_link(struct inode *dir, struct ufs_dir_entry *de,
 969                          struct page *page, struct inode *inode);
 970
 971 /* file.c */
 972 extern const struct inode_operations ufs_file_inode_operations;
 973 extern const struct file_operations ufs_file_operations;
 974
 975 extern const struct address_space_operations ufs_aops;
 976
 977 /* ialloc.c */
 978 extern void ufs_free_inode (struct inode *inode);
 979 extern struct inode * ufs_new_inode (struct inode *, int);
 980
 981 /* inode.c */
 982 extern void ufs_read_inode (struct inode *);
 983 extern void ufs_put_inode (struct inode *);
 984 extern int ufs_write_inode (struct inode *, int);
 985 extern int ufs_sync_inode (struct inode *);
 986 extern void ufs_delete_inode (struct inode *);
 987 extern struct buffer_head * ufs_bread (struct inode *, unsigned, int, int *);
 988 extern int ufs_getfrag_block (struct inode *inode, sector_t fragment, struct buffer_head *bh_result, int create);
 989
 990 /* namei.c */
 991 extern const struct file_operations ufs_dir_operations;
 992
 993 /* super.c */
 994 extern void ufs_warning (struct super_block *, const char *, const char *, ...) __attribute__ ((format (printf, 3, 4)));
 995 extern void ufs_error (struct super_block *, const char *, const char *, ...) __attribute__ ((format (printf, 3, 4)));
 996 extern void ufs_panic (struct super_block *, const char *, const char *, ...) __attribute__ ((format (printf, 3, 4)));
 997
 998 /* symlink.c */
 999 extern const struct inode_operations ufs_fast_symlink_inode_operations;
1000
1001 /* truncate.c */
1002 extern int ufs_truncate (struct inode *, loff_t);
1003
1004 static inline struct ufs_sb_info *UFS_SB(struct super_block *sb)
1005 {
1006         return sb->s_fs_info;
1007 }
1008
1009 static inline struct ufs_inode_info *UFS_I(struct inode *inode)
1010 {
1011         return container_of(inode, struct ufs_inode_info, vfs_inode);
1012 }
1013
1014 /*
1015  * Give cylinder group number for a file system block.
1016  * Give cylinder group block number for a file system block.
1017  */
1018 /* #define      ufs_dtog(d)     ((d) / uspi->s_fpg) */
1019 static inline u64 ufs_dtog(struct ufs_sb_private_info * uspi, u64 b)
1020 {
1021         do_div(b, uspi->s_fpg);
1022         return b;
1023 }
1024 /* #define      ufs_dtogd(d)    ((d) % uspi->s_fpg) */
1025 static inline u32 ufs_dtogd(struct ufs_sb_private_info * uspi, u64 b)
1026 {
1027         return do_div(b, uspi->s_fpg);
1028 }
1029
1030 #endif  /* __KERNEL__ */
1031
1032 #endif /* __LINUX_UFS_FS_H */