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
  23 #ifndef __LINUX_UFS_FS_H
  24 #define __LINUX_UFS_FS_H
  25
  26 #include <linux/types.h>
  27 #include <linux/kernel.h>
  28 #include <linux/time.h>
  29 #include <linux/stat.h>
  30
  31 #define UFS_BBLOCK 0
  32 #define UFS_BBSIZE 8192
  33 #define UFS_SBLOCK 8192
  34 #define UFS_SBSIZE 8192
  35
  36 #define UFS_SECTOR_SIZE 512
  37 #define UFS_SECTOR_BITS 9
  38 #define UFS_MAGIC 0x00011954
  39 #define UFS_CIGAM 0x54190100 /* byteswapped MAGIC */
  40
  41 #define UFS_BSIZE       8192
  42 #define UFS_MINBSIZE    4096
  43 #define UFS_FSIZE       1024
  44 #define UFS_MAXFRAG     (UFS_BSIZE / UFS_FSIZE)
  45
  46 #define UFS_NDADDR 12
  47 #define UFS_NINDIR 3
  48
  49 #define UFS_IND_BLOCK   (UFS_NDADDR + 0)
  50 #define UFS_DIND_BLOCK  (UFS_NDADDR + 1)
  51 #define UFS_TIND_BLOCK  (UFS_NDADDR + 2)
  52
  53 #define UFS_NDIR_FRAGMENT (UFS_NDADDR << uspi->s_fpbshift)
  54 #define UFS_IND_FRAGMENT (UFS_IND_BLOCK << uspi->s_fpbshift)
  55 #define UFS_DIND_FRAGMENT (UFS_DIND_BLOCK << uspi->s_fpbshift)
  56 #define UFS_TIND_FRAGMENT (UFS_TIND_BLOCK << uspi->s_fpbshift)
  57
  58 #define UFS_ROOTINO 2
  59 #define UFS_FIRST_INO (UFS_ROOTINO + 1)
  60
  61 #define UFS_USEEFT  ((__u16)65535)
  62
  63 #define UFS_FSOK      0x7c269d38
  64 #define UFS_FSACTIVE  ((char)0x00)
  65 #define UFS_FSCLEAN   ((char)0x01)
  66 #define UFS_FSSTABLE  ((char)0x02)
  67 #define UFS_FSOSF1    ((char)0x03)      /* is this correct for DEC OSF/1? */
  68 #define UFS_FSBAD     ((char)0xff)
  69
  70 /* From here to next blank line, s_flags for ufs_sb_info */
  71 /* endianness */
  72 #define UFS_BYTESEX             0x00000001      /* mask; leave room to 0xF */
  73 #if defined(__LITTLE_ENDIAN) || defined(__BIG_ENDIAN)
  74 /* these are for sane architectures */
  75 #define UFS_NATIVE_ENDIAN       0x00000000
  76 #define UFS_SWABBED_ENDIAN      0x00000001
  77 #else
  78 /* these are for pervert architectures */
  79 #define UFS_LITTLE_ENDIAN       0x00000000
  80 #define UFS_BIG_ENDIAN          0x00000001
  81 #endif
  82 /* directory entry encoding */
  83 #define UFS_DE_MASK             0x00000010      /* mask for the following */
  84 #define UFS_DE_OLD              0x00000000
  85 #define UFS_DE_44BSD            0x00000010
  86 /* uid encoding */
  87 #define UFS_UID_MASK            0x00000060      /* mask for the following */
  88 #define UFS_UID_OLD             0x00000000
  89 #define UFS_UID_44BSD           0x00000020
  90 #define UFS_UID_EFT             0x00000040
  91 /* superblock state encoding */
  92 #define UFS_ST_MASK             0x00000700      /* mask for the following */
  93 #define UFS_ST_OLD              0x00000000
  94 #define UFS_ST_44BSD            0x00000100
  95 #define UFS_ST_SUN              0x00000200
  96 #define UFS_ST_SUNx86           0x00000400
  97 /*cylinder group encoding */
  98 #define UFS_CG_MASK             0x00003000      /* mask for the following */
  99 #define UFS_CG_OLD              0x00000000
 100 #define UFS_CG_44BSD            0x00002000
 101 #define UFS_CG_SUN              0x00001000
 102
 103 /* fs_inodefmt options */
 104 #define UFS_42INODEFMT  -1
 105 #define UFS_44INODEFMT  2
 106
 107 /* mount options */
 108 #define UFS_MOUNT_ONERROR               0x0000000F
 109 #define UFS_MOUNT_ONERROR_PANIC         0x00000001
 110 #define UFS_MOUNT_ONERROR_LOCK          0x00000002
 111 #define UFS_MOUNT_ONERROR_UMOUNT        0x00000004
 112 #define UFS_MOUNT_ONERROR_REPAIR        0x00000008
 113
 114 #define UFS_MOUNT_UFSTYPE               0x000007F0
 115 #define UFS_MOUNT_UFSTYPE_OLD           0x00000010
 116 #define UFS_MOUNT_UFSTYPE_44BSD         0x00000020
 117 #define UFS_MOUNT_UFSTYPE_SUN           0x00000040
 118 #define UFS_MOUNT_UFSTYPE_NEXTSTEP      0x00000080
 119 #define UFS_MOUNT_UFSTYPE_NEXTSTEP_CD   0x00000100
 120 #define UFS_MOUNT_UFSTYPE_OPENSTEP      0x00000200
 121 #define UFS_MOUNT_UFSTYPE_SUNx86        0x00000400
 122
 123 #define ufs_clear_opt(o,opt)    o &= ~UFS_MOUNT_##opt
 124 #define ufs_set_opt(o,opt)      o |= UFS_MOUNT_##opt
 125 #define ufs_test_opt(o,opt)     ((o) & UFS_MOUNT_##opt)
 126
 127 /*
 128  * MINFREE gives the minimum acceptable percentage of file system
 129  * blocks which may be free. If the freelist drops below this level
 130  * only the superuser may continue to allocate blocks. This may
 131  * be set to 0 if no reserve of free blocks is deemed necessary,
 132  * however throughput drops by fifty percent if the file system
 133  * is run at between 95% and 100% full; thus the minimum default
 134  * value of fs_minfree is 5%. However, to get good clustering
 135  * performance, 10% is a better choice. hence we use 10% as our
 136  * default value. With 10% free space, fragmentation is not a
 137  * problem, so we choose to optimize for time.
 138  */
 139 #define UFS_MINFREE         5
 140 #define UFS_DEFAULTOPT      UFS_OPTTIME
 141
 142 /*
 143  * Turn file system block numbers into disk block addresses.
 144  * This maps file system blocks to device size blocks.
 145  */
 146 #define ufs_fsbtodb(uspi, b)    ((b) << (uspi)->s_fsbtodb)
 147 #define ufs_dbtofsb(uspi, b)    ((b) >> (uspi)->s_fsbtodb)
 148
 149 /*
 150  * Cylinder group macros to locate things in cylinder groups.
 151  * They calc file system addresses of cylinder group data structures.
 152  */
 153 #define ufs_cgbase(c)   (uspi->s_fpg * (c))
 154 #define ufs_cgstart(c)  (ufs_cgbase(c)  + uspi->s_cgoffset * ((c) & ~uspi->s_cgmask))
 155 #define ufs_cgsblock(c) (ufs_cgstart(c) + uspi->s_sblkno)       /* super blk */
 156 #define ufs_cgcmin(c)   (ufs_cgstart(c) + uspi->s_cblkno)       /* cg block */
 157 #define ufs_cgimin(c)   (ufs_cgstart(c) + uspi->s_iblkno)       /* inode blk */
 158 #define ufs_cgdmin(c)   (ufs_cgstart(c) + uspi->s_dblkno)       /* 1st data */
 159
 160 /*
 161  * Macros for handling inode numbers:
 162  *     inode number to file system block offset.
 163  *     inode number to cylinder group number.
 164  *     inode number to file system block address.
 165  */
 166 #define ufs_inotocg(x)          ((x) / uspi->s_ipg)
 167 #define ufs_inotocgoff(x)       ((x) % uspi->s_ipg)
 168 #define ufs_inotofsba(x)        (ufs_cgimin(ufs_inotocg(x)) + ufs_inotocgoff(x) / uspi->s_inopf)
 169 #define ufs_inotofsbo(x)        ((x) % uspi->s_inopf)
 170
 171 /*
 172  * Give cylinder group number for a file system block.
 173  * Give cylinder group block number for a file system block.
 174  */
 175 #define ufs_dtog(d)     ((d) / uspi->s_fpg)
 176 #define ufs_dtogd(d)    ((d) % uspi->s_fpg)
 177
 178 /*
 179  * Compute the cylinder and rotational position of a cyl block addr.
 180  */
 181 #define ufs_cbtocylno(bno) \
 182         ((bno) * uspi->s_nspf / uspi->s_spc)
 183 #define ufs_cbtorpos(bno) \
 184         ((((bno) * uspi->s_nspf % uspi->s_spc / uspi->s_nsect \
 185         * uspi->s_trackskew + (bno) * uspi->s_nspf % uspi->s_spc \
 186         % uspi->s_nsect * uspi->s_interleave) % uspi->s_nsect \
 187         * uspi->s_nrpos) / uspi->s_npsect)
 188
 189 /*
 190  * The following macros optimize certain frequently calculated
 191  * quantities by using shifts and masks in place of divisions
 192  * modulos and multiplications.
 193  */
 194 #define ufs_blkoff(loc)         ((loc) & uspi->s_qbmask)
 195 #define ufs_fragoff(loc)        ((loc) & uspi->s_qfmask)
 196 #define ufs_lblktosize(blk)     ((blk) << uspi->s_bshift)
 197 #define ufs_lblkno(loc)         ((loc) >> uspi->s_bshift)
 198 #define ufs_numfrags(loc)       ((loc) >> uspi->s_fshift)
 199 #define ufs_blkroundup(size)    (((size) + uspi->s_qbmask) & uspi->s_bmask)
 200 #define ufs_fragroundup(size)   (((size) + uspi->s_qfmask) & uspi->s_fmask)
 201 #define ufs_fragstoblks(frags)  ((frags) >> uspi->s_fpbshift)
 202 #define ufs_blkstofrags(blks)   ((blks) << uspi->s_fpbshift)
 203 #define ufs_fragnum(fsb)        ((fsb) & uspi->s_fpbmask)
 204 #define ufs_blknum(fsb)         ((fsb) & ~uspi->s_fpbmask)
 205
 206 #define UFS_MAXNAMLEN 255
 207 #define UFS_MAXMNTLEN 512
 208 #define UFS_MAXCSBUFS 31
 209 #define UFS_LINK_MAX 32000
 210
 211 /*
 212  * UFS_DIR_PAD defines the directory entries boundaries
 213  * (must be a multiple of 4)
 214  */
 215 #define UFS_DIR_PAD                     4
 216 #define UFS_DIR_ROUND                   (UFS_DIR_PAD - 1)
 217 #define UFS_DIR_REC_LEN(name_len)       (((name_len) + 1 + 8 + UFS_DIR_ROUND) & ~UFS_DIR_ROUND)
 218
 219 struct ufs_timeval {
 220         __s32   tv_sec;
 221         __s32   tv_usec;
 222 };
 223
 224 /*
 225  * File types
 226  */
 227 #define DT_UNKNOWN      0
 228 #define DT_FIFO         1
 229 #define DT_CHR          2
 230 #define DT_DIR          4
 231 #define DT_BLK          6
 232 #define DT_REG          8
 233 #define DT_LNK          10
 234 #define DT_SOCK         12
 235 #define DT_WHT          14
 236
 237 struct ufs_dir_entry {
 238         __u32  d_ino;                   /* inode number of this entry */
 239         __u16  d_reclen;                /* length of this entry */
 240         union {
 241                 __u16   d_namlen;               /* actual length of d_name */
 242                 struct {
 243                         __u8    d_type;         /* file type */
 244                         __u8    d_namlen;       /* length of string in d_name */
 245                 } d_44;
 246         } d_u;
 247         __u8    d_name[UFS_MAXNAMLEN + 1];      /* file name */
 248 };
 249
 250 struct ufs_csum {
 251         __u32   cs_ndir;        /* number of directories */
 252         __u32   cs_nbfree;      /* number of free blocks */
 253         __u32   cs_nifree;      /* number of free inodes */
 254         __u32   cs_nffree;      /* number of free frags */
 255 };
 256
 257 /*
 258  * This is the actual superblock, as it is laid out on the disk.
 259  */
 260 struct ufs_super_block {
 261         __u32   fs_link;        /* UNUSED */
 262         __u32   fs_rlink;       /* UNUSED */
 263         __u32   fs_sblkno;      /* addr of super-block in filesys */
 264         __u32   fs_cblkno;      /* offset of cyl-block in filesys */
 265         __u32   fs_iblkno;      /* offset of inode-blocks in filesys */
 266         __u32   fs_dblkno;      /* offset of first data after cg */
 267         __u32   fs_cgoffset;    /* cylinder group offset in cylinder */
 268         __u32   fs_cgmask;      /* used to calc mod fs_ntrak */
 269         __u32   fs_time;        /* last time written -- time_t */
 270         __u32   fs_size;        /* number of blocks in fs */
 271         __u32   fs_dsize;       /* number of data blocks in fs */
 272         __u32   fs_ncg;         /* number of cylinder groups */
 273         __u32   fs_bsize;       /* size of basic blocks in fs */
 274         __u32   fs_fsize;       /* size of frag blocks in fs */
 275         __u32   fs_frag;        /* number of frags in a block in fs */
 276 /* these are configuration parameters */
 277         __u32   fs_minfree;     /* minimum percentage of free blocks */
 278         __u32   fs_rotdelay;    /* num of ms for optimal next block */
 279         __u32   fs_rps;         /* disk revolutions per second */
 280 /* these fields can be computed from the others */
 281         __u32   fs_bmask;       /* ``blkoff'' calc of blk offsets */
 282         __u32   fs_fmask;       /* ``fragoff'' calc of frag offsets */
 283         __u32   fs_bshift;      /* ``lblkno'' calc of logical blkno */
 284         __u32   fs_fshift;      /* ``numfrags'' calc number of frags */
 285 /* these are configuration parameters */
 286         __u32   fs_maxcontig;   /* max number of contiguous blks */
 287         __u32   fs_maxbpg;      /* max number of blks per cyl group */
 288 /* these fields can be computed from the others */
 289         __u32   fs_fragshift;   /* block to frag shift */
 290         __u32   fs_fsbtodb;     /* fsbtodb and dbtofsb shift constant */
 291         __u32   fs_sbsize;      /* actual size of super block */
 292         __u32   fs_csmask;      /* csum block offset */
 293         __u32   fs_csshift;     /* csum block number */
 294         __u32   fs_nindir;      /* value of NINDIR */
 295         __u32   fs_inopb;       /* value of INOPB */
 296         __u32   fs_nspf;        /* value of NSPF */
 297 /* yet another configuration parameter */
 298         __u32   fs_optim;       /* optimization preference, see below */
 299 /* these fields are derived from the hardware */
 300         union {
 301                 struct {
 302                         __u32   fs_npsect;      /* # sectors/track including spares */
 303                 } fs_sun;
 304                 struct {
 305                         __s32   fs_state;       /* file system state time stamp */
 306                 } fs_sunx86;
 307         } fs_u1;
 308         __u32   fs_interleave;  /* hardware sector interleave */
 309         __u32   fs_trackskew;   /* sector 0 skew, per track */
 310 /* a unique id for this filesystem (currently unused and unmaintained) */
 311 /* In 4.3 Tahoe this space is used by fs_headswitch and fs_trkseek */
 312 /* Neither of those fields is used in the Tahoe code right now but */
 313 /* there could be problems if they are.                            */
 314         __u32   fs_id[2];       /* file system id */
 315 /* sizes determined by number of cylinder groups and their sizes */
 316         __u32   fs_csaddr;      /* blk addr of cyl grp summary area */
 317         __u32   fs_cssize;      /* size of cyl grp summary area */
 318         __u32   fs_cgsize;      /* cylinder group size */
 319 /* these fields are derived from the hardware */
 320         __u32   fs_ntrak;       /* tracks per cylinder */
 321         __u32   fs_nsect;       /* sectors per track */
 322         __u32   fs_spc;         /* sectors per cylinder */
 323 /* this comes from the disk driver partitioning */
 324         __u32   fs_ncyl;        /* cylinders in file system */
 325 /* these fields can be computed from the others */
 326         __u32   fs_cpg;         /* cylinders per group */
 327         __u32   fs_ipg;         /* inodes per group */
 328         __u32   fs_fpg;         /* blocks per group * fs_frag */
 329 /* this data must be re-computed after crashes */
 330         struct ufs_csum fs_cstotal;     /* cylinder summary information */
 331 /* these fields are cleared at mount time */
 332         __s8    fs_fmod;        /* super block modified flag */
 333         __s8    fs_clean;       /* file system is clean flag */
 334         __s8    fs_ronly;       /* mounted read-only flag */
 335         __s8    fs_flags;       /* currently unused flag */
 336         __s8    fs_fsmnt[UFS_MAXMNTLEN];        /* name mounted on */
 337 /* these fields retain the current block allocation info */
 338         __u32   fs_cgrotor;     /* last cg searched */
 339         __u32   fs_csp[UFS_MAXCSBUFS];  /* list of fs_cs info buffers */
 340         __u32   fs_maxcluster;
 341         __u32   fs_cpc;         /* cyl per cycle in postbl */
 342         __u16   fs_opostbl[16][8];      /* old rotation block list head */
 343         union {
 344                 struct {
 345                         __s32   fs_sparecon[53];/* reserved for future constants */
 346                         __s32   fs_reclaim;
 347                         __s32   fs_sparecon2[1];
 348                         __s32   fs_state;       /* file system state time stamp */
 349                         __u32   fs_qbmask[2];   /* ~usb_bmask */
 350                         __u32   fs_qfmask[2];   /* ~usb_fmask */
 351                 } fs_sun;
 352                 struct {
 353                         __s32   fs_sparecon[53];/* reserved for future constants */
 354                         __s32   fs_reclaim;
 355                         __s32   fs_sparecon2[1];
 356                         __u32   fs_npsect;      /* # sectors/track including spares */
 357                         __u32   fs_qbmask[2];   /* ~usb_bmask */
 358                         __u32   fs_qfmask[2];   /* ~usb_fmask */
 359                 } fs_sunx86;
 360                 struct {
 361                         __s32   fs_sparecon[50];/* reserved for future constants */
 362                         __s32   fs_contigsumsize;/* size of cluster summary array */
 363                         __s32   fs_maxsymlinklen;/* max length of an internal symlink */
 364                         __s32   fs_inodefmt;    /* format of on-disk inodes */
 365                         __u32   fs_maxfilesize[2];      /* max representable file size */
 366                         __u32   fs_qbmask[2];   /* ~usb_bmask */
 367                         __u32   fs_qfmask[2];   /* ~usb_fmask */
 368                         __s32   fs_state;       /* file system state time stamp */
 369                 } fs_44;
 370         } fs_u2;
 371         __s32   fs_postblformat;        /* format of positional layout tables */
 372         __s32   fs_nrpos;               /* number of rotational positions */
 373         __s32   fs_postbloff;           /* (__s16) rotation block list head */
 374         __s32   fs_rotbloff;            /* (__u8) blocks for each rotation */
 375         __s32   fs_magic;               /* magic number */
 376         __u8    fs_space[1];            /* list of blocks for each rotation */
 377 };
 378
 379 /*
 380  * Preference for optimization.
 381  */
 382 #define UFS_OPTTIME     0       /* minimize allocation time */
 383 #define UFS_OPTSPACE    1       /* minimize disk fragmentation */
 384
 385 /*
 386  * Rotational layout table format types
 387  */
 388 #define UFS_42POSTBLFMT         -1      /* 4.2BSD rotational table format */
 389 #define UFS_DYNAMICPOSTBLFMT    1       /* dynamic rotational table format */
 390
 391 /*
 392  * Convert cylinder group to base address of its global summary info.
 393  */
 394 #define fs_cs(indx) \
 395         u.ufs_sb.s_csp[(indx) >> uspi->s_csshift][(indx) & ~uspi->s_csmask]
 396
 397 /*
 398  * Cylinder group block for a file system.
 399  *
 400  * Writable fields in the cylinder group are protected by the associated
 401  * super block lock fs->fs_lock.
 402  */
 403 #define CG_MAGIC        0x090255
 404 #define ufs_cg_chkmagic(ucg)    (SWAB32((ucg)->cg_magic) == CG_MAGIC)
 405
 406 /*
 407  * size of this structure is 172 B
 408  */
 409 struct  ufs_cylinder_group {
 410         __u32   cg_link;                /* linked list of cyl groups */
 411         __u32   cg_magic;               /* magic number */
 412         __u32   cg_time;                /* time last written */
 413         __u32   cg_cgx;                 /* we are the cgx'th cylinder group */
 414         __u16   cg_ncyl;                /* number of cyl's this cg */
 415         __u16   cg_niblk;               /* number of inode blocks this cg */
 416         __u32   cg_ndblk;               /* number of data blocks this cg */
 417         struct  ufs_csum cg_cs;         /* cylinder summary information */
 418         __u32   cg_rotor;               /* position of last used block */
 419         __u32   cg_frotor;              /* position of last used frag */
 420         __u32   cg_irotor;              /* position of last used inode */
 421         __u32   cg_frsum[UFS_MAXFRAG];  /* counts of available frags */
 422         __u32   cg_btotoff;             /* (__u32) block totals per cylinder */
 423         __u32   cg_boff;                /* (short) free block positions */
 424         __u32   cg_iusedoff;            /* (char) used inode map */
 425         __u32   cg_freeoff;             /* (u_char) free block map */
 426         __u32   cg_nextfreeoff;         /* (u_char) next available space */
 427         union {
 428                 struct {
 429                         __u32   cg_clustersumoff;       /* (u_int32) counts of avail clusters */
 430                         __u32   cg_clusteroff;          /* (u_int8) free cluster map */
 431                         __u32   cg_nclusterblks;        /* number of clusters this cg */
 432                         __u32   cg_sparecon[13];        /* reserved for future use */
 433                 } cg_44;
 434                 __u32   cg_sparecon[16];        /* reserved for future use */
 435         } cg_u;
 436         __u8    cg_space[1];            /* space for cylinder group maps */
 437 /* actually longer */
 438 };
 439
 440 /*
 441  * structure of an on-disk inode
 442  */
 443 struct ufs_inode {
 444         __u16   ui_mode;                /*  0x0 */
 445         __u16   ui_nlink;               /*  0x2 */
 446         union {
 447                 struct {
 448                         __u16   ui_suid;        /*  0x4 */
 449                         __u16   ui_sgid;        /*  0x6 */
 450                 } oldids;
 451                 __u32   ui_inumber;             /*  0x4 lsf: inode number */
 452                 __u32   ui_author;              /*  0x4 GNU HURD: author */
 453         } ui_u1;
 454         __u64   ui_size;                /*  0x8 */
 455         struct ufs_timeval ui_atime;    /* 0x10 access */
 456         struct ufs_timeval ui_mtime;    /* 0x18 modification */
 457         struct ufs_timeval ui_ctime;    /* 0x20 creation */
 458         union {
 459                 struct {
 460                         __u32   ui_db[UFS_NDADDR];/* 0x28 data blocks */
 461                         __u32   ui_ib[UFS_NINDIR];/* 0x58 indirect blocks */
 462                 } ui_addr;
 463                 __u8    ui_symlink[4*(UFS_NDADDR+UFS_NINDIR)];/* 0x28 fast symlink */
 464         } ui_u2;
 465         __u32   ui_flags;               /* 0x64 immutable, append-only... */
 466         __u32   ui_blocks;              /* 0x68 blocks in use */
 467         __u32   ui_gen;                 /* 0x6c like ext2 i_version, for NFS support */
 468         union {
 469                 struct {
 470                         __u32   ui_shadow;      /* 0x70 shadow inode with security data */
 471                         __u32   ui_uid;         /* 0x74 long EFT version of uid */
 472                         __u32   ui_gid;         /* 0x78 long EFT version of gid */
 473                         __u32   ui_oeftflag;    /* 0x7c reserved */
 474                 } ui_sun;
 475                 struct {
 476                         __u32   ui_uid;         /* 0x70 File owner */
 477                         __u32   ui_gid;         /* 0x74 File group */
 478                         __s32   ui_spare[2];    /* 0x78 reserved */
 479                 } ui_44;
 480                 struct {
 481                         __u32   ui_uid;         /* 0x70 */
 482                         __u32   ui_gid;         /* 0x74 */
 483                         __u16   ui_modeh;       /* 0x78 mode high bits */
 484                         __u16   ui_spare;       /* 0x7A unused */
 485                         __u32   ui_trans;       /* 0x7c filesystem translator */
 486                 } ui_hurd;
 487         } ui_u3;
 488 };
 489
 490 /* FreeBSD has these in sys/stat.h */
 491 /* ui_flags that can be set by a file owner */
 492 #define UFS_UF_SETTABLE   0x0000ffff
 493 #define UFS_UF_NODUMP     0x00000001  /* do not dump */
 494 #define UFS_UF_IMMUTABLE  0x00000002  /* immutable (can't "change") */
 495 #define UFS_UF_APPEND     0x00000004  /* append-only */
 496 #define UFS_UF_OPAQUE     0x00000008  /* directory is opaque (unionfs) */
 497 #define UFS_UF_NOUNLINK   0x00000010  /* can't be removed or renamed */
 498 /* ui_flags that only root can set */
 499 #define UFS_SF_SETTABLE   0xffff0000
 500 #define UFS_SF_ARCHIVED   0x00010000  /* archived */
 501 #define UFS_SF_IMMUTABLE  0x00020000  /* immutable (can't "change") */
 502 #define UFS_SF_APPEND     0x00040000  /* append-only */
 503 #define UFS_SF_NOUNLINK   0x00100000  /* can't be removed or renamed */
 504
 505 #ifdef __KERNEL__
 506
 507 /* acl.c */
 508 extern int ufs_permission (struct inode *, int);
 509
 510 /* balloc.c */
 511 extern void ufs_free_fragments (struct inode *, unsigned, unsigned);
 512 extern void ufs_free_blocks (struct inode *, unsigned, unsigned);
 513 extern unsigned ufs_new_fragments (struct inode *, u32 *, unsigned, unsigned, unsigned, int *);
 514
 515 /* cylinder.c */
 516 extern struct ufs_cg_private_info * ufs_load_cylinder (struct super_block *, unsigned);
 517 extern void ufs_put_cylinder (struct super_block *, unsigned);
 518
 519 /* dir.c */
 520 extern struct inode_operations ufs_dir_inode_operations;
 521 extern struct file_operations ufs_dir_operations;
 522 extern int ufs_check_dir_entry (const char *, struct inode *, struct ufs_dir_entry *, struct buffer_head *, unsigned long);
 523
 524 /* file.c */
 525 extern struct inode_operations ufs_file_inode_operations;
 526 extern struct file_operations ufs_file_operations;
 527
 528 /* ialloc.c */
 529 extern void ufs_free_inode (struct inode *inode);
 530 extern struct inode * ufs_new_inode (const struct inode *, int, int *);
 531
 532 /* inode.c */
 533 extern int ufs_frag_map (struct inode *, int);
 534 extern void ufs_read_inode (struct inode *);
 535 extern void ufs_put_inode (struct inode *);
 536 extern void ufs_write_inode (struct inode *);
 537 extern int ufs_sync_inode (struct inode *);
 538 extern void ufs_write_inode (struct inode *);
 539 extern void ufs_delete_inode (struct inode *);
 540 extern struct buffer_head * ufs_getfrag (struct inode *, unsigned, int, int *);
 541 extern int ufs_getfrag_block (struct inode *, long, struct buffer_head *, int);
 542 extern struct buffer_head * ufs_bread (struct inode *, unsigned, int, int *);
 543
 544 /* namei.c */
 545 extern struct dentry *ufs_lookup (struct inode *, struct dentry *);
 546 extern int ufs_mkdir(struct inode *, struct dentry *, int);
 547 extern int ufs_rmdir (struct inode *, struct dentry *);
 548 extern int ufs_unlink (struct inode *, struct dentry *);
 549 extern int ufs_create (struct inode *, struct dentry *, int);
 550 extern int ufs_rename (struct inode *, struct dentry *, struct inode *, struct dentry *);
 551 extern int ufs_mknod (struct inode *, struct dentry *, int, int);
 552 extern int ufs_symlink (struct inode *, struct dentry *, const char *);
 553 extern int ufs_link (struct dentry *, struct inode *, struct dentry *);
 554
 555 /* super.c */
 556 extern struct super_operations ufs_super_ops;
 557 extern struct file_system_type ufs_fs_type;
 558 extern void ufs_warning (struct super_block *, const char *, const char *, ...) __attribute__ ((format (printf, 3, 4)));
 559 extern void ufs_error (struct super_block *, const char *, const char *, ...) __attribute__ ((format (printf, 3, 4)));
 560 extern void ufs_panic (struct super_block *, const char *, const char *, ...) __attribute__ ((format (printf, 3, 4)));
 561 extern int init_ufs_fs(void);
 562 extern void ufs_write_super (struct super_block *);
 563
 564 /* symlink.c */
 565 extern struct inode_operations ufs_symlink_inode_operations;
 566
 567 /* truncate.c */
 568 extern void ufs_truncate (struct inode *);
 569
 570 #endif  /* __KERNEL__ */
 571
 572 #endif /* __LINUX_UFS_FS_H */