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