1 /* 2 * linux/include/linux/ufs_fs.h 3 * 4 * Copyright (C) 1996 5 * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu) 6 * Laboratory for Computer Science Research Computing Facility 7 * Rutgers, The State University of New Jersey 8 * 9 * Clean swab support by Fare <fare@tunes.org> 10 * just hope no one is using NNUUXXI on __?64 structure elements 11 * 64-bit clean thanks to Maciej W. Rozycki <macro@ds2.pg.gda.pl> 12 * 13 * 4.4BSD (FreeBSD) support added on February 1st 1998 by 14 * Niels Kristian Bech Jensen <nkbj@image.dk> partially based 15 * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>. 16 * 17 * NeXTstep support added on February 5th 1998 by 18 * Niels Kristian Bech Jensen <nkbj@image.dk>. 19 * 20 * Write support by Daniel Pirkl <daniel.pirkl@email.cz> 21 * 22 * HP/UX hfs filesystem support added by 23 * Martin K. Petersen <mkp@mkp.net>, August 1999 24 * 25 * UFS2 (of FreeBSD 5.x) support added by 26 * Niraj Kumar <niraj17@iitbombay.org> , Jan 2004 27 * 28 */ 29 30 #ifndef __LINUX_UFS_FS_H 31 #define __LINUX_UFS_FS_H 32 33 #include <linux/types.h> 34 #include <linux/kernel.h> 35 #include <linux/stat.h> 36 #include <linux/fs.h> 37 #include <linux/workqueue.h> 38 39 #include <asm/div64.h> 40 typedef __u64 __bitwise __fs64; 41 typedef __u32 __bitwise __fs32; 42 typedef __u16 __bitwise __fs16; 43 44 #define UFS_BBLOCK 0 45 #define UFS_BBSIZE 8192 46 #define UFS_SBLOCK 8192 47 #define UFS_SBSIZE 8192 48 49 #define UFS_SECTOR_SIZE 512 50 #define UFS_SECTOR_BITS 9 51 #define UFS_MAGIC 0x00011954 52 #define UFS_MAGIC_BW 0x0f242697 53 #define UFS2_MAGIC 0x19540119 54 #define UFS_CIGAM 0x54190100 /* byteswapped MAGIC */ 55 56 /* Copied from FreeBSD */ 57 /* 58 * Each disk drive contains some number of filesystems. 59 * A filesystem consists of a number of cylinder groups. 60 * Each cylinder group has inodes and data. 61 * 62 * A filesystem is described by its super-block, which in turn 63 * describes the cylinder groups. The super-block is critical 64 * data and is replicated in each cylinder group to protect against 65 * catastrophic loss. This is done at `newfs' time and the critical 66 * super-block data does not change, so the copies need not be 67 * referenced further unless disaster strikes. 68 * 69 * For filesystem fs, the offsets of the various blocks of interest 70 * are given in the super block as: 71 * [fs->fs_sblkno] Super-block 72 * [fs->fs_cblkno] Cylinder group block 73 * [fs->fs_iblkno] Inode blocks 74 * [fs->fs_dblkno] Data blocks 75 * The beginning of cylinder group cg in fs, is given by 76 * the ``cgbase(fs, cg)'' macro. 77 * 78 * Depending on the architecture and the media, the superblock may 79 * reside in any one of four places. For tiny media where every block 80 * counts, it is placed at the very front of the partition. Historically, 81 * UFS1 placed it 8K from the front to leave room for the disk label and 82 * a small bootstrap. For UFS2 it got moved to 64K from the front to leave 83 * room for the disk label and a bigger bootstrap, and for really piggy 84 * systems we check at 256K from the front if the first three fail. In 85 * all cases the size of the superblock will be SBLOCKSIZE. All values are 86 * given in byte-offset form, so they do not imply a sector size. The 87 * SBLOCKSEARCH specifies the order in which the locations should be searched. 88 */ 89 #define SBLOCK_FLOPPY 0 90 #define SBLOCK_UFS1 8192 91 #define SBLOCK_UFS2 65536 92 #define SBLOCK_PIGGY 262144 93 #define SBLOCKSIZE 8192 94 #define SBLOCKSEARCH \ 95 { SBLOCK_UFS2, SBLOCK_UFS1, SBLOCK_FLOPPY, SBLOCK_PIGGY, -1 } 96 97 98 /* HP specific MAGIC values */ 99 100 #define UFS_MAGIC_LFN 0x00095014 /* fs supports filenames > 14 chars */ 101 #define UFS_CIGAM_LFN 0x14500900 /* srahc 41 < semanelif stroppus sf */ 102 103 #define UFS_MAGIC_SEC 0x00612195 /* B1 security fs */ 104 #define UFS_CIGAM_SEC 0x95216100 105 106 #define UFS_MAGIC_FEA 0x00195612 /* fs_featurebits supported */ 107 #define UFS_CIGAM_FEA 0x12561900 108 109 #define UFS_MAGIC_4GB 0x05231994 /* fs > 4 GB && fs_featurebits */ 110 #define UFS_CIGAM_4GB 0x94192305 111 112 /* Seems somebody at HP goofed here. B1 and lfs are both 0x2 !?! */ 113 #define UFS_FSF_LFN 0x00000001 /* long file names */ 114 #define UFS_FSF_B1 0x00000002 /* B1 security */ 115 #define UFS_FSF_LFS 0x00000002 /* large files */ 116 #define UFS_FSF_LUID 0x00000004 /* large UIDs */ 117 118 /* End of HP stuff */ 119 120 121 #define UFS_BSIZE 8192 122 #define UFS_MINBSIZE 4096 123 #define UFS_FSIZE 1024 124 #define UFS_MAXFRAG (UFS_BSIZE / UFS_FSIZE) 125 126 #define UFS_NDADDR 12 127 #define UFS_NINDIR 3 128 129 #define UFS_IND_BLOCK (UFS_NDADDR + 0) 130 #define UFS_DIND_BLOCK (UFS_NDADDR + 1) 131 #define UFS_TIND_BLOCK (UFS_NDADDR + 2) 132 133 #define UFS_NDIR_FRAGMENT (UFS_NDADDR << uspi->s_fpbshift) 134 #define UFS_IND_FRAGMENT (UFS_IND_BLOCK << uspi->s_fpbshift) 135 #define UFS_DIND_FRAGMENT (UFS_DIND_BLOCK << uspi->s_fpbshift) 136 #define UFS_TIND_FRAGMENT (UFS_TIND_BLOCK << uspi->s_fpbshift) 137 138 #define UFS_ROOTINO 2 139 #define UFS_FIRST_INO (UFS_ROOTINO + 1) 140 141 #define UFS_USEEFT ((__u16)65535) 142 143 /* fs_clean values */ 144 #define UFS_FSOK 0x7c269d38 145 #define UFS_FSACTIVE ((__s8)0x00) 146 #define UFS_FSCLEAN ((__s8)0x01) 147 #define UFS_FSSTABLE ((__s8)0x02) 148 #define UFS_FSOSF1 ((__s8)0x03) /* is this correct for DEC OSF/1? */ 149 #define UFS_FSBAD ((__s8)0xff) 150 151 /* Solaris-specific fs_clean values */ 152 #define UFS_FSSUSPEND ((__s8)0xfe) /* temporarily suspended */ 153 #define UFS_FSLOG ((__s8)0xfd) /* logging fs */ 154 #define UFS_FSFIX ((__s8)0xfc) /* being repaired while mounted */ 155 156 /* From here to next blank line, s_flags for ufs_sb_info */ 157 /* directory entry encoding */ 158 #define UFS_DE_MASK 0x00000010 /* mask for the following */ 159 #define UFS_DE_OLD 0x00000000 160 #define UFS_DE_44BSD 0x00000010 161 /* uid encoding */ 162 #define UFS_UID_MASK 0x00000060 /* mask for the following */ 163 #define UFS_UID_OLD 0x00000000 164 #define UFS_UID_44BSD 0x00000020 165 #define UFS_UID_EFT 0x00000040 166 /* superblock state encoding */ 167 #define UFS_ST_MASK 0x00000700 /* mask for the following */ 168 #define UFS_ST_OLD 0x00000000 169 #define UFS_ST_44BSD 0x00000100 170 #define UFS_ST_SUN 0x00000200 /* Solaris */ 171 #define UFS_ST_SUNOS 0x00000300 172 #define UFS_ST_SUNx86 0x00000400 /* Solaris x86 */ 173 /*cylinder group encoding */ 174 #define UFS_CG_MASK 0x00003000 /* mask for the following */ 175 #define UFS_CG_OLD 0x00000000 176 #define UFS_CG_44BSD 0x00002000 177 #define UFS_CG_SUN 0x00001000 178 /* filesystem type encoding */ 179 #define UFS_TYPE_MASK 0x00010000 /* mask for the following */ 180 #define UFS_TYPE_UFS1 0x00000000 181 #define UFS_TYPE_UFS2 0x00010000 182 183 184 /* fs_inodefmt options */ 185 #define UFS_42INODEFMT -1 186 #define UFS_44INODEFMT 2 187 188 /* 189 * MINFREE gives the minimum acceptable percentage of file system 190 * blocks which may be free. If the freelist drops below this level 191 * only the superuser may continue to allocate blocks. This may 192 * be set to 0 if no reserve of free blocks is deemed necessary, 193 * however throughput drops by fifty percent if the file system 194 * is run at between 95% and 100% full; thus the minimum default 195 * value of fs_minfree is 5%. However, to get good clustering 196 * performance, 10% is a better choice. hence we use 10% as our 197 * default value. With 10% free space, fragmentation is not a 198 * problem, so we choose to optimize for time. 199 */ 200 #define UFS_MINFREE 5 201 #define UFS_DEFAULTOPT UFS_OPTTIME 202 203 /* 204 * Turn file system block numbers into disk block addresses. 205 * This maps file system blocks to device size blocks. 206 */ 207 #define ufs_fsbtodb(uspi, b) ((b) << (uspi)->s_fsbtodb) 208 #define ufs_dbtofsb(uspi, b) ((b) >> (uspi)->s_fsbtodb) 209 210 /* 211 * Cylinder group macros to locate things in cylinder groups. 212 * They calc file system addresses of cylinder group data structures. 213 */ 214 #define ufs_cgbase(c) (uspi->s_fpg * (c)) 215 #define ufs_cgstart(c) ((uspi)->fs_magic == UFS2_MAGIC ? ufs_cgbase(c) : \ 216 (ufs_cgbase(c) + uspi->s_cgoffset * ((c) & ~uspi->s_cgmask))) 217 #define ufs_cgsblock(c) (ufs_cgstart(c) + uspi->s_sblkno) /* super blk */ 218 #define ufs_cgcmin(c) (ufs_cgstart(c) + uspi->s_cblkno) /* cg block */ 219 #define ufs_cgimin(c) (ufs_cgstart(c) + uspi->s_iblkno) /* inode blk */ 220 #define ufs_cgdmin(c) (ufs_cgstart(c) + uspi->s_dblkno) /* 1st data */ 221 222 /* 223 * Macros for handling inode numbers: 224 * inode number to file system block offset. 225 * inode number to cylinder group number. 226 * inode number to file system block address. 227 */ 228 #define ufs_inotocg(x) ((x) / uspi->s_ipg) 229 #define ufs_inotocgoff(x) ((x) % uspi->s_ipg) 230 #define ufs_inotofsba(x) (((u64)ufs_cgimin(ufs_inotocg(x))) + ufs_inotocgoff(x) / uspi->s_inopf) 231 #define ufs_inotofsbo(x) ((x) % uspi->s_inopf) 232 233 /* 234 * Compute the cylinder and rotational position of a cyl block addr. 235 */ 236 #define ufs_cbtocylno(bno) \ 237 ((bno) * uspi->s_nspf / uspi->s_spc) 238 #define ufs_cbtorpos(bno) \ 239 ((UFS_SB(sb)->s_flags & UFS_CG_SUN) ? \ 240 (((((bno) * uspi->s_nspf % uspi->s_spc) % \ 241 uspi->s_nsect) * \ 242 uspi->s_nrpos) / uspi->s_nsect) \ 243 : \ 244 ((((bno) * uspi->s_nspf % uspi->s_spc / uspi->s_nsect \ 245 * uspi->s_trackskew + (bno) * uspi->s_nspf % uspi->s_spc \ 246 % uspi->s_nsect * uspi->s_interleave) % uspi->s_nsect \ 247 * uspi->s_nrpos) / uspi->s_npsect)) 248 249 /* 250 * The following macros optimize certain frequently calculated 251 * quantities by using shifts and masks in place of divisions 252 * modulos and multiplications. 253 */ 254 #define ufs_blkoff(loc) ((loc) & uspi->s_qbmask) 255 #define ufs_fragoff(loc) ((loc) & uspi->s_qfmask) 256 #define ufs_lblktosize(blk) ((blk) << uspi->s_bshift) 257 #define ufs_lblkno(loc) ((loc) >> uspi->s_bshift) 258 #define ufs_numfrags(loc) ((loc) >> uspi->s_fshift) 259 #define ufs_blkroundup(size) (((size) + uspi->s_qbmask) & uspi->s_bmask) 260 #define ufs_fragroundup(size) (((size) + uspi->s_qfmask) & uspi->s_fmask) 261 #define ufs_fragstoblks(frags) ((frags) >> uspi->s_fpbshift) 262 #define ufs_blkstofrags(blks) ((blks) << uspi->s_fpbshift) 263 #define ufs_fragnum(fsb) ((fsb) & uspi->s_fpbmask) 264 #define ufs_blknum(fsb) ((fsb) & ~uspi->s_fpbmask) 265 266 #define UFS_MAXNAMLEN 255 267 #define UFS_MAXMNTLEN 512 268 #define UFS2_MAXMNTLEN 468 269 #define UFS2_MAXVOLLEN 32 270 #define UFS_MAXCSBUFS 31 271 #define UFS_LINK_MAX 32000 272 /* 273 #define UFS2_NOCSPTRS ((128 / sizeof(void *)) - 4) 274 */ 275 #define UFS2_NOCSPTRS 28 276 277 /* 278 * UFS_DIR_PAD defines the directory entries boundaries 279 * (must be a multiple of 4) 280 */ 281 #define UFS_DIR_PAD 4 282 #define UFS_DIR_ROUND (UFS_DIR_PAD - 1) 283 #define UFS_DIR_REC_LEN(name_len) (((name_len) + 1 + 8 + UFS_DIR_ROUND) & ~UFS_DIR_ROUND) 284 285 struct ufs_timeval { 286 __fs32 tv_sec; 287 __fs32 tv_usec; 288 }; 289 290 struct ufs_dir_entry { 291 __fs32 d_ino; /* inode number of this entry */ 292 __fs16 d_reclen; /* length of this entry */ 293 union { 294 __fs16 d_namlen; /* actual length of d_name */ 295 struct { 296 __u8 d_type; /* file type */ 297 __u8 d_namlen; /* length of string in d_name */ 298 } d_44; 299 } d_u; 300 __u8 d_name[UFS_MAXNAMLEN + 1]; /* file name */ 301 }; 302 303 struct ufs_csum { 304 __fs32 cs_ndir; /* number of directories */ 305 __fs32 cs_nbfree; /* number of free blocks */ 306 __fs32 cs_nifree; /* number of free inodes */ 307 __fs32 cs_nffree; /* number of free frags */ 308 }; 309 struct ufs2_csum_total { 310 __fs64 cs_ndir; /* number of directories */ 311 __fs64 cs_nbfree; /* number of free blocks */ 312 __fs64 cs_nifree; /* number of free inodes */ 313 __fs64 cs_nffree; /* number of free frags */ 314 __fs64 cs_numclusters; /* number of free clusters */ 315 __fs64 cs_spare[3]; /* future expansion */ 316 }; 317 318 struct ufs_csum_core { 319 __u64 cs_ndir; /* number of directories */ 320 __u64 cs_nbfree; /* number of free blocks */ 321 __u64 cs_nifree; /* number of free inodes */ 322 __u64 cs_nffree; /* number of free frags */ 323 __u64 cs_numclusters; /* number of free clusters */ 324 }; 325 326 /* 327 * File system flags 328 */ 329 #define UFS_UNCLEAN 0x01 /* file system not clean at mount (unused) */ 330 #define UFS_DOSOFTDEP 0x02 /* file system using soft dependencies */ 331 #define UFS_NEEDSFSCK 0x04 /* needs sync fsck (FreeBSD compat, unused) */ 332 #define UFS_INDEXDIRS 0x08 /* kernel supports indexed directories */ 333 #define UFS_ACLS 0x10 /* file system has ACLs enabled */ 334 #define UFS_MULTILABEL 0x20 /* file system is MAC multi-label */ 335 #define UFS_FLAGS_UPDATED 0x80 /* flags have been moved to new location */ 336 337 #if 0 338 /* 339 * This is the actual superblock, as it is laid out on the disk. 340 * Do NOT use this structure, because of sizeof(ufs_super_block) > 512 and 341 * it may occupy several blocks, use 342 * struct ufs_super_block_(first,second,third) instead. 343 */ 344 struct ufs_super_block { 345 union { 346 struct { 347 __fs32 fs_link; /* UNUSED */ 348 } fs_42; 349 struct { 350 __fs32 fs_state; /* file system state flag */ 351 } fs_sun; 352 } fs_u0; 353 __fs32 fs_rlink; /* UNUSED */ 354 __fs32 fs_sblkno; /* addr of super-block in filesys */ 355 __fs32 fs_cblkno; /* offset of cyl-block in filesys */ 356 __fs32 fs_iblkno; /* offset of inode-blocks in filesys */ 357 __fs32 fs_dblkno; /* offset of first data after cg */ 358 __fs32 fs_cgoffset; /* cylinder group offset in cylinder */ 359 __fs32 fs_cgmask; /* used to calc mod fs_ntrak */ 360 __fs32 fs_time; /* last time written -- time_t */ 361 __fs32 fs_size; /* number of blocks in fs */ 362 __fs32 fs_dsize; /* number of data blocks in fs */ 363 __fs32 fs_ncg; /* number of cylinder groups */ 364 __fs32 fs_bsize; /* size of basic blocks in fs */ 365 __fs32 fs_fsize; /* size of frag blocks in fs */ 366 __fs32 fs_frag; /* number of frags in a block in fs */ 367 /* these are configuration parameters */ 368 __fs32 fs_minfree; /* minimum percentage of free blocks */ 369 __fs32 fs_rotdelay; /* num of ms for optimal next block */ 370 __fs32 fs_rps; /* disk revolutions per second */ 371 /* these fields can be computed from the others */ 372 __fs32 fs_bmask; /* ``blkoff'' calc of blk offsets */ 373 __fs32 fs_fmask; /* ``fragoff'' calc of frag offsets */ 374 __fs32 fs_bshift; /* ``lblkno'' calc of logical blkno */ 375 __fs32 fs_fshift; /* ``numfrags'' calc number of frags */ 376 /* these are configuration parameters */ 377 __fs32 fs_maxcontig; /* max number of contiguous blks */ 378 __fs32 fs_maxbpg; /* max number of blks per cyl group */ 379 /* these fields can be computed from the others */ 380 __fs32 fs_fragshift; /* block to frag shift */ 381 __fs32 fs_fsbtodb; /* fsbtodb and dbtofsb shift constant */ 382 __fs32 fs_sbsize; /* actual size of super block */ 383 __fs32 fs_csmask; /* csum block offset */ 384 __fs32 fs_csshift; /* csum block number */ 385 __fs32 fs_nindir; /* value of NINDIR */ 386 __fs32 fs_inopb; /* value of INOPB */ 387 __fs32 fs_nspf; /* value of NSPF */ 388 /* yet another configuration parameter */ 389 __fs32 fs_optim; /* optimization preference, see below */ 390 /* these fields are derived from the hardware */ 391 union { 392 struct { 393 __fs32 fs_npsect; /* # sectors/track including spares */ 394 } fs_sun; 395 struct { 396 __fs32 fs_state; /* file system state time stamp */ 397 } fs_sunx86; 398 } fs_u1; 399 __fs32 fs_interleave; /* hardware sector interleave */ 400 __fs32 fs_trackskew; /* sector 0 skew, per track */ 401 /* a unique id for this filesystem (currently unused and unmaintained) */ 402 /* In 4.3 Tahoe this space is used by fs_headswitch and fs_trkseek */ 403 /* Neither of those fields is used in the Tahoe code right now but */ 404 /* there could be problems if they are. */ 405 __fs32 fs_id[2]; /* file system id */ 406 /* sizes determined by number of cylinder groups and their sizes */ 407 __fs32 fs_csaddr; /* blk addr of cyl grp summary area */ 408 __fs32 fs_cssize; /* size of cyl grp summary area */ 409 __fs32 fs_cgsize; /* cylinder group size */ 410 /* these fields are derived from the hardware */ 411 __fs32 fs_ntrak; /* tracks per cylinder */ 412 __fs32 fs_nsect; /* sectors per track */ 413 __fs32 fs_spc; /* sectors per cylinder */ 414 /* this comes from the disk driver partitioning */ 415 __fs32 fs_ncyl; /* cylinders in file system */ 416 /* these fields can be computed from the others */ 417 __fs32 fs_cpg; /* cylinders per group */ 418 __fs32 fs_ipg; /* inodes per cylinder group */ 419 __fs32 fs_fpg; /* blocks per group * fs_frag */ 420 /* this data must be re-computed after crashes */ 421 struct ufs_csum fs_cstotal; /* cylinder summary information */ 422 /* these fields are cleared at mount time */ 423 __s8 fs_fmod; /* super block modified flag */ 424 __s8 fs_clean; /* file system is clean flag */ 425 __s8 fs_ronly; /* mounted read-only flag */ 426 __s8 fs_flags; 427 union { 428 struct { 429 __s8 fs_fsmnt[UFS_MAXMNTLEN];/* name mounted on */ 430 __fs32 fs_cgrotor; /* last cg searched */ 431 __fs32 fs_csp[UFS_MAXCSBUFS];/*list of fs_cs info buffers */ 432 __fs32 fs_maxcluster; 433 __fs32 fs_cpc; /* cyl per cycle in postbl */ 434 __fs16 fs_opostbl[16][8]; /* old rotation block list head */ 435 } fs_u1; 436 struct { 437 __s8 fs_fsmnt[UFS2_MAXMNTLEN]; /* name mounted on */ 438 __u8 fs_volname[UFS2_MAXVOLLEN]; /* volume name */ 439 __fs64 fs_swuid; /* system-wide uid */ 440 __fs32 fs_pad; /* due to alignment of fs_swuid */ 441 __fs32 fs_cgrotor; /* last cg searched */ 442 __fs32 fs_ocsp[UFS2_NOCSPTRS]; /*list of fs_cs info buffers */ 443 __fs32 fs_contigdirs;/*# of contiguously allocated dirs */ 444 __fs32 fs_csp; /* cg summary info buffer for fs_cs */ 445 __fs32 fs_maxcluster; 446 __fs32 fs_active;/* used by snapshots to track fs */ 447 __fs32 fs_old_cpc; /* cyl per cycle in postbl */ 448 __fs32 fs_maxbsize;/*maximum blocking factor permitted */ 449 __fs64 fs_sparecon64[17];/*old rotation block list head */ 450 __fs64 fs_sblockloc; /* byte offset of standard superblock */ 451 struct ufs2_csum_total fs_cstotal;/*cylinder summary information*/ 452 struct ufs_timeval fs_time; /* last time written */ 453 __fs64 fs_size; /* number of blocks in fs */ 454 __fs64 fs_dsize; /* number of data blocks in fs */ 455 __fs64 fs_csaddr; /* blk addr of cyl grp summary area */ 456 __fs64 fs_pendingblocks;/* blocks in process of being freed */ 457 __fs32 fs_pendinginodes;/*inodes in process of being freed */ 458 } fs_u2; 459 } fs_u11; 460 union { 461 struct { 462 __fs32 fs_sparecon[53];/* reserved for future constants */ 463 __fs32 fs_reclaim; 464 __fs32 fs_sparecon2[1]; 465 __fs32 fs_state; /* file system state time stamp */ 466 __fs32 fs_qbmask[2]; /* ~usb_bmask */ 467 __fs32 fs_qfmask[2]; /* ~usb_fmask */ 468 } fs_sun; 469 struct { 470 __fs32 fs_sparecon[53];/* reserved for future constants */ 471 __fs32 fs_reclaim; 472 __fs32 fs_sparecon2[1]; 473 __fs32 fs_npsect; /* # sectors/track including spares */ 474 __fs32 fs_qbmask[2]; /* ~usb_bmask */ 475 __fs32 fs_qfmask[2]; /* ~usb_fmask */ 476 } fs_sunx86; 477 struct { 478 __fs32 fs_sparecon[50];/* reserved for future constants */ 479 __fs32 fs_contigsumsize;/* size of cluster summary array */ 480 __fs32 fs_maxsymlinklen;/* max length of an internal symlink */ 481 __fs32 fs_inodefmt; /* format of on-disk inodes */ 482 __fs32 fs_maxfilesize[2]; /* max representable file size */ 483 __fs32 fs_qbmask[2]; /* ~usb_bmask */ 484 __fs32 fs_qfmask[2]; /* ~usb_fmask */ 485 __fs32 fs_state; /* file system state time stamp */ 486 } fs_44; 487 } fs_u2; 488 __fs32 fs_postblformat; /* format of positional layout tables */ 489 __fs32 fs_nrpos; /* number of rotational positions */ 490 __fs32 fs_postbloff; /* (__s16) rotation block list head */ 491 __fs32 fs_rotbloff; /* (__u8) blocks for each rotation */ 492 __fs32 fs_magic; /* magic number */ 493 __u8 fs_space[1]; /* list of blocks for each rotation */ 494 }; 495 #endif/*struct ufs_super_block*/ 496 497 /* 498 * Preference for optimization. 499 */ 500 #define UFS_OPTTIME 0 /* minimize allocation time */ 501 #define UFS_OPTSPACE 1 /* minimize disk fragmentation */ 502 503 /* 504 * Rotational layout table format types 505 */ 506 #define UFS_42POSTBLFMT -1 /* 4.2BSD rotational table format */ 507 #define UFS_DYNAMICPOSTBLFMT 1 /* dynamic rotational table format */ 508 509 /* 510 * Convert cylinder group to base address of its global summary info. 511 */ 512 #define fs_cs(indx) s_csp[(indx)] 513 514 /* 515 * Cylinder group block for a file system. 516 * 517 * Writable fields in the cylinder group are protected by the associated 518 * super block lock fs->fs_lock. 519 */ 520 #define CG_MAGIC 0x090255 521 #define ufs_cg_chkmagic(sb, ucg) \ 522 (fs32_to_cpu((sb), (ucg)->cg_magic) == CG_MAGIC) 523 /* 524 * Macros for access to old cylinder group array structures 525 */ 526 #define ufs_ocg_blktot(sb, ucg) fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_btot) 527 #define ufs_ocg_blks(sb, ucg, cylno) fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_b[cylno]) 528 #define ufs_ocg_inosused(sb, ucg) fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_iused) 529 #define ufs_ocg_blksfree(sb, ucg) fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_free) 530 #define ufs_ocg_chkmagic(sb, ucg) \ 531 (fs32_to_cpu((sb), ((struct ufs_old_cylinder_group *)(ucg))->cg_magic) == CG_MAGIC) 532 533 /* 534 * size of this structure is 172 B 535 */ 536 struct ufs_cylinder_group { 537 __fs32 cg_link; /* linked list of cyl groups */ 538 __fs32 cg_magic; /* magic number */ 539 __fs32 cg_time; /* time last written */ 540 __fs32 cg_cgx; /* we are the cgx'th cylinder group */ 541 __fs16 cg_ncyl; /* number of cyl's this cg */ 542 __fs16 cg_niblk; /* number of inode blocks this cg */ 543 __fs32 cg_ndblk; /* number of data blocks this cg */ 544 struct ufs_csum cg_cs; /* cylinder summary information */ 545 __fs32 cg_rotor; /* position of last used block */ 546 __fs32 cg_frotor; /* position of last used frag */ 547 __fs32 cg_irotor; /* position of last used inode */ 548 __fs32 cg_frsum[UFS_MAXFRAG]; /* counts of available frags */ 549 __fs32 cg_btotoff; /* (__u32) block totals per cylinder */ 550 __fs32 cg_boff; /* (short) free block positions */ 551 __fs32 cg_iusedoff; /* (char) used inode map */ 552 __fs32 cg_freeoff; /* (u_char) free block map */ 553 __fs32 cg_nextfreeoff; /* (u_char) next available space */ 554 union { 555 struct { 556 __fs32 cg_clustersumoff; /* (u_int32) counts of avail clusters */ 557 __fs32 cg_clusteroff; /* (u_int8) free cluster map */ 558 __fs32 cg_nclusterblks; /* number of clusters this cg */ 559 __fs32 cg_sparecon[13]; /* reserved for future use */ 560 } cg_44; 561 struct { 562 __fs32 cg_clustersumoff;/* (u_int32) counts of avail clusters */ 563 __fs32 cg_clusteroff; /* (u_int8) free cluster map */ 564 __fs32 cg_nclusterblks;/* number of clusters this cg */ 565 __fs32 cg_niblk; /* number of inode blocks this cg */ 566 __fs32 cg_initediblk; /* last initialized inode */ 567 __fs32 cg_sparecon32[3];/* reserved for future use */ 568 __fs64 cg_time; /* time last written */ 569 __fs64 cg_sparecon[3]; /* reserved for future use */ 570 } cg_u2; 571 __fs32 cg_sparecon[16]; /* reserved for future use */ 572 } cg_u; 573 __u8 cg_space[1]; /* space for cylinder group maps */ 574 /* actually longer */ 575 }; 576 577 /* Historic Cylinder group info */ 578 struct ufs_old_cylinder_group { 579 __fs32 cg_link; /* linked list of cyl groups */ 580 __fs32 cg_rlink; /* for incore cyl groups */ 581 __fs32 cg_time; /* time last written */ 582 __fs32 cg_cgx; /* we are the cgx'th cylinder group */ 583 __fs16 cg_ncyl; /* number of cyl's this cg */ 584 __fs16 cg_niblk; /* number of inode blocks this cg */ 585 __fs32 cg_ndblk; /* number of data blocks this cg */ 586 struct ufs_csum cg_cs; /* cylinder summary information */ 587 __fs32 cg_rotor; /* position of last used block */ 588 __fs32 cg_frotor; /* position of last used frag */ 589 __fs32 cg_irotor; /* position of last used inode */ 590 __fs32 cg_frsum[8]; /* counts of available frags */ 591 __fs32 cg_btot[32]; /* block totals per cylinder */ 592 __fs16 cg_b[32][8]; /* positions of free blocks */ 593 __u8 cg_iused[256]; /* used inode map */ 594 __fs32 cg_magic; /* magic number */ 595 __u8 cg_free[1]; /* free block map */ 596 /* actually longer */ 597 }; 598 599 /* 600 * structure of an on-disk inode 601 */ 602 struct ufs_inode { 603 __fs16 ui_mode; /* 0x0 */ 604 __fs16 ui_nlink; /* 0x2 */ 605 union { 606 struct { 607 __fs16 ui_suid; /* 0x4 */ 608 __fs16 ui_sgid; /* 0x6 */ 609 } oldids; 610 __fs32 ui_inumber; /* 0x4 lsf: inode number */ 611 __fs32 ui_author; /* 0x4 GNU HURD: author */ 612 } ui_u1; 613 __fs64 ui_size; /* 0x8 */ 614 struct ufs_timeval ui_atime; /* 0x10 access */ 615 struct ufs_timeval ui_mtime; /* 0x18 modification */ 616 struct ufs_timeval ui_ctime; /* 0x20 creation */ 617 union { 618 struct { 619 __fs32 ui_db[UFS_NDADDR];/* 0x28 data blocks */ 620 __fs32 ui_ib[UFS_NINDIR];/* 0x58 indirect blocks */ 621 } ui_addr; 622 __u8 ui_symlink[4*(UFS_NDADDR+UFS_NINDIR)];/* 0x28 fast symlink */ 623 } ui_u2; 624 __fs32 ui_flags; /* 0x64 immutable, append-only... */ 625 __fs32 ui_blocks; /* 0x68 blocks in use */ 626 __fs32 ui_gen; /* 0x6c like ext2 i_version, for NFS support */ 627 union { 628 struct { 629 __fs32 ui_shadow; /* 0x70 shadow inode with security data */ 630 __fs32 ui_uid; /* 0x74 long EFT version of uid */ 631 __fs32 ui_gid; /* 0x78 long EFT version of gid */ 632 __fs32 ui_oeftflag; /* 0x7c reserved */ 633 } ui_sun; 634 struct { 635 __fs32 ui_uid; /* 0x70 File owner */ 636 __fs32 ui_gid; /* 0x74 File group */ 637 __fs32 ui_spare[2]; /* 0x78 reserved */ 638 } ui_44; 639 struct { 640 __fs32 ui_uid; /* 0x70 */ 641 __fs32 ui_gid; /* 0x74 */ 642 __fs16 ui_modeh; /* 0x78 mode high bits */ 643 __fs16 ui_spare; /* 0x7A unused */ 644 __fs32 ui_trans; /* 0x7c filesystem translator */ 645 } ui_hurd; 646 } ui_u3; 647 }; 648 649 #define UFS_NXADDR 2 /* External addresses in inode. */ 650 struct ufs2_inode { 651 __fs16 ui_mode; /* 0: IFMT, permissions; see below. */ 652 __fs16 ui_nlink; /* 2: File link count. */ 653 __fs32 ui_uid; /* 4: File owner. */ 654 __fs32 ui_gid; /* 8: File group. */ 655 __fs32 ui_blksize; /* 12: Inode blocksize. */ 656 __fs64 ui_size; /* 16: File byte count. */ 657 __fs64 ui_blocks; /* 24: Bytes actually held. */ 658 __fs64 ui_atime; /* 32: Last access time. */ 659 __fs64 ui_mtime; /* 40: Last modified time. */ 660 __fs64 ui_ctime; /* 48: Last inode change time. */ 661 __fs64 ui_birthtime; /* 56: Inode creation time. */ 662 __fs32 ui_mtimensec; /* 64: Last modified time. */ 663 __fs32 ui_atimensec; /* 68: Last access time. */ 664 __fs32 ui_ctimensec; /* 72: Last inode change time. */ 665 __fs32 ui_birthnsec; /* 76: Inode creation time. */ 666 __fs32 ui_gen; /* 80: Generation number. */ 667 __fs32 ui_kernflags; /* 84: Kernel flags. */ 668 __fs32 ui_flags; /* 88: Status flags (chflags). */ 669 __fs32 ui_extsize; /* 92: External attributes block. */ 670 __fs64 ui_extb[UFS_NXADDR];/* 96: External attributes block. */ 671 union { 672 struct { 673 __fs64 ui_db[UFS_NDADDR]; /* 112: Direct disk blocks. */ 674 __fs64 ui_ib[UFS_NINDIR];/* 208: Indirect disk blocks.*/ 675 } ui_addr; 676 __u8 ui_symlink[2*4*(UFS_NDADDR+UFS_NINDIR)];/* 0x28 fast symlink */ 677 } ui_u2; 678 __fs64 ui_spare[3]; /* 232: Reserved; currently unused */ 679 }; 680 681 682 /* FreeBSD has these in sys/stat.h */ 683 /* ui_flags that can be set by a file owner */ 684 #define UFS_UF_SETTABLE 0x0000ffff 685 #define UFS_UF_NODUMP 0x00000001 /* do not dump */ 686 #define UFS_UF_IMMUTABLE 0x00000002 /* immutable (can't "change") */ 687 #define UFS_UF_APPEND 0x00000004 /* append-only */ 688 #define UFS_UF_OPAQUE 0x00000008 /* directory is opaque (unionfs) */ 689 #define UFS_UF_NOUNLINK 0x00000010 /* can't be removed or renamed */ 690 /* ui_flags that only root can set */ 691 #define UFS_SF_SETTABLE 0xffff0000 692 #define UFS_SF_ARCHIVED 0x00010000 /* archived */ 693 #define UFS_SF_IMMUTABLE 0x00020000 /* immutable (can't "change") */ 694 #define UFS_SF_APPEND 0x00040000 /* append-only */ 695 #define UFS_SF_NOUNLINK 0x00100000 /* can't be removed or renamed */ 696 697 /* 698 * This structure is used for reading disk structures larger 699 * than the size of fragment. 700 */ 701 struct ufs_buffer_head { 702 __u64 fragment; /* first fragment */ 703 __u64 count; /* number of fragments */ 704 struct buffer_head * bh[UFS_MAXFRAG]; /* buffers */ 705 }; 706 707 struct ufs_cg_private_info { 708 struct ufs_buffer_head c_ubh; 709 __u32 c_cgx; /* number of cylidner group */ 710 __u16 c_ncyl; /* number of cyl's this cg */ 711 __u16 c_niblk; /* number of inode blocks this cg */ 712 __u32 c_ndblk; /* number of data blocks this cg */ 713 __u32 c_rotor; /* position of last used block */ 714 __u32 c_frotor; /* position of last used frag */ 715 __u32 c_irotor; /* position of last used inode */ 716 __u32 c_btotoff; /* (__u32) block totals per cylinder */ 717 __u32 c_boff; /* (short) free block positions */ 718 __u32 c_iusedoff; /* (char) used inode map */ 719 __u32 c_freeoff; /* (u_char) free block map */ 720 __u32 c_nextfreeoff; /* (u_char) next available space */ 721 __u32 c_clustersumoff;/* (u_int32) counts of avail clusters */ 722 __u32 c_clusteroff; /* (u_int8) free cluster map */ 723 __u32 c_nclusterblks; /* number of clusters this cg */ 724 }; 725 726 727 struct ufs_sb_private_info { 728 struct ufs_buffer_head s_ubh; /* buffer containing super block */ 729 struct ufs_csum_core cs_total; 730 __u32 s_sblkno; /* offset of super-blocks in filesys */ 731 __u32 s_cblkno; /* offset of cg-block in filesys */ 732 __u32 s_iblkno; /* offset of inode-blocks in filesys */ 733 __u32 s_dblkno; /* offset of first data after cg */ 734 __u32 s_cgoffset; /* cylinder group offset in cylinder */ 735 __u32 s_cgmask; /* used to calc mod fs_ntrak */ 736 __u64 s_size; /* number of blocks (fragments) in fs */ 737 __u64 s_dsize; /* number of data blocks in fs */ 738 __u32 s_ncg; /* number of cylinder groups */ 739 __u32 s_bsize; /* size of basic blocks */ 740 __u32 s_fsize; /* size of fragments */ 741 __u32 s_fpb; /* fragments per block */ 742 __u32 s_minfree; /* minimum percentage of free blocks */ 743 __u32 s_bmask; /* `blkoff'' calc of blk offsets */ 744 __u32 s_fmask; /* s_fsize mask */ 745 __u32 s_bshift; /* `lblkno'' calc of logical blkno */ 746 __u32 s_fshift; /* s_fsize shift */ 747 __u32 s_fpbshift; /* fragments per block shift */ 748 __u32 s_fsbtodb; /* fsbtodb and dbtofsb shift constant */ 749 __u32 s_sbsize; /* actual size of super block */ 750 __u32 s_csmask; /* csum block offset */ 751 __u32 s_csshift; /* csum block number */ 752 __u32 s_nindir; /* value of NINDIR */ 753 __u32 s_inopb; /* value of INOPB */ 754 __u32 s_nspf; /* value of NSPF */ 755 __u32 s_npsect; /* # sectors/track including spares */ 756 __u32 s_interleave; /* hardware sector interleave */ 757 __u32 s_trackskew; /* sector 0 skew, per track */ 758 __u64 s_csaddr; /* blk addr of cyl grp summary area */ 759 __u32 s_cssize; /* size of cyl grp summary area */ 760 __u32 s_cgsize; /* cylinder group size */ 761 __u32 s_ntrak; /* tracks per cylinder */ 762 __u32 s_nsect; /* sectors per track */ 763 __u32 s_spc; /* sectors per cylinder */ 764 __u32 s_ipg; /* inodes per cylinder group */ 765 __u32 s_fpg; /* fragments per group */ 766 __u32 s_cpc; /* cyl per cycle in postbl */ 767 __s32 s_contigsumsize;/* size of cluster summary array, 44bsd */ 768 __s64 s_qbmask; /* ~usb_bmask */ 769 __s64 s_qfmask; /* ~usb_fmask */ 770 __s32 s_postblformat; /* format of positional layout tables */ 771 __s32 s_nrpos; /* number of rotational positions */ 772 __s32 s_postbloff; /* (__s16) rotation block list head */ 773 __s32 s_rotbloff; /* (__u8) blocks for each rotation */ 774 775 __u32 s_fpbmask; /* fragments per block mask */ 776 __u32 s_apb; /* address per block */ 777 __u32 s_2apb; /* address per block^2 */ 778 __u32 s_3apb; /* address per block^3 */ 779 __u32 s_apbmask; /* address per block mask */ 780 __u32 s_apbshift; /* address per block shift */ 781 __u32 s_2apbshift; /* address per block shift * 2 */ 782 __u32 s_3apbshift; /* address per block shift * 3 */ 783 __u32 s_nspfshift; /* number of sector per fragment shift */ 784 __u32 s_nspb; /* number of sector per block */ 785 __u32 s_inopf; /* inodes per fragment */ 786 __u32 s_sbbase; /* offset of NeXTstep superblock */ 787 __u32 s_bpf; /* bits per fragment */ 788 __u32 s_bpfshift; /* bits per fragment shift*/ 789 __u32 s_bpfmask; /* bits per fragment mask */ 790 791 __u32 s_maxsymlinklen;/* upper limit on fast symlinks' size */ 792 __s32 fs_magic; /* filesystem magic */ 793 unsigned int s_dirblksize; 794 __u64 s_root_blocks; 795 __u64 s_time_to_space; 796 __u64 s_space_to_time; 797 }; 798 799 /* 800 * Sizes of this structures are: 801 * ufs_super_block_first 512 802 * ufs_super_block_second 512 803 * ufs_super_block_third 356 804 */ 805 struct ufs_super_block_first { 806 union { 807 struct { 808 __fs32 fs_link; /* UNUSED */ 809 } fs_42; 810 struct { 811 __fs32 fs_state; /* file system state flag */ 812 } fs_sun; 813 } fs_u0; 814 __fs32 fs_rlink; 815 __fs32 fs_sblkno; 816 __fs32 fs_cblkno; 817 __fs32 fs_iblkno; 818 __fs32 fs_dblkno; 819 __fs32 fs_cgoffset; 820 __fs32 fs_cgmask; 821 __fs32 fs_time; 822 __fs32 fs_size; 823 __fs32 fs_dsize; 824 __fs32 fs_ncg; 825 __fs32 fs_bsize; 826 __fs32 fs_fsize; 827 __fs32 fs_frag; 828 __fs32 fs_minfree; 829 __fs32 fs_rotdelay; 830 __fs32 fs_rps; 831 __fs32 fs_bmask; 832 __fs32 fs_fmask; 833 __fs32 fs_bshift; 834 __fs32 fs_fshift; 835 __fs32 fs_maxcontig; 836 __fs32 fs_maxbpg; 837 __fs32 fs_fragshift; 838 __fs32 fs_fsbtodb; 839 __fs32 fs_sbsize; 840 __fs32 fs_csmask; 841 __fs32 fs_csshift; 842 __fs32 fs_nindir; 843 __fs32 fs_inopb; 844 __fs32 fs_nspf; 845 __fs32 fs_optim; 846 union { 847 struct { 848 __fs32 fs_npsect; 849 } fs_sun; 850 struct { 851 __fs32 fs_state; 852 } fs_sunx86; 853 } fs_u1; 854 __fs32 fs_interleave; 855 __fs32 fs_trackskew; 856 __fs32 fs_id[2]; 857 __fs32 fs_csaddr; 858 __fs32 fs_cssize; 859 __fs32 fs_cgsize; 860 __fs32 fs_ntrak; 861 __fs32 fs_nsect; 862 __fs32 fs_spc; 863 __fs32 fs_ncyl; 864 __fs32 fs_cpg; 865 __fs32 fs_ipg; 866 __fs32 fs_fpg; 867 struct ufs_csum fs_cstotal; 868 __s8 fs_fmod; 869 __s8 fs_clean; 870 __s8 fs_ronly; 871 __s8 fs_flags; 872 __s8 fs_fsmnt[UFS_MAXMNTLEN - 212]; 873 874 }; 875 876 struct ufs_super_block_second { 877 union { 878 struct { 879 __s8 fs_fsmnt[212]; 880 __fs32 fs_cgrotor; 881 __fs32 fs_csp[UFS_MAXCSBUFS]; 882 __fs32 fs_maxcluster; 883 __fs32 fs_cpc; 884 __fs16 fs_opostbl[82]; 885 } fs_u1; 886 struct { 887 __s8 fs_fsmnt[UFS2_MAXMNTLEN - UFS_MAXMNTLEN + 212]; 888 __u8 fs_volname[UFS2_MAXVOLLEN]; 889 __fs64 fs_swuid; 890 __fs32 fs_pad; 891 __fs32 fs_cgrotor; 892 __fs32 fs_ocsp[UFS2_NOCSPTRS]; 893 __fs32 fs_contigdirs; 894 __fs32 fs_csp; 895 __fs32 fs_maxcluster; 896 __fs32 fs_active; 897 __fs32 fs_old_cpc; 898 __fs32 fs_maxbsize; 899 __fs64 fs_sparecon64[17]; 900 __fs64 fs_sblockloc; 901 __fs64 cs_ndir; 902 __fs64 cs_nbfree; 903 } fs_u2; 904 } fs_un; 905 }; 906 907 struct ufs_super_block_third { 908 union { 909 struct { 910 __fs16 fs_opostbl[46]; 911 } fs_u1; 912 struct { 913 __fs64 cs_nifree; /* number of free inodes */ 914 __fs64 cs_nffree; /* number of free frags */ 915 __fs64 cs_numclusters; /* number of free clusters */ 916 __fs64 cs_spare[3]; /* future expansion */ 917 struct ufs_timeval fs_time; /* last time written */ 918 __fs64 fs_size; /* number of blocks in fs */ 919 __fs64 fs_dsize; /* number of data blocks in fs */ 920 __fs64 fs_csaddr; /* blk addr of cyl grp summary area */ 921 __fs64 fs_pendingblocks;/* blocks in process of being freed */ 922 __fs32 fs_pendinginodes;/*inodes in process of being freed */ 923 } __attribute__ ((packed)) fs_u2; 924 } fs_un1; 925 union { 926 struct { 927 __fs32 fs_sparecon[53];/* reserved for future constants */ 928 __fs32 fs_reclaim; 929 __fs32 fs_sparecon2[1]; 930 __fs32 fs_state; /* file system state time stamp */ 931 __fs32 fs_qbmask[2]; /* ~usb_bmask */ 932 __fs32 fs_qfmask[2]; /* ~usb_fmask */ 933 } fs_sun; 934 struct { 935 __fs32 fs_sparecon[53];/* reserved for future constants */ 936 __fs32 fs_reclaim; 937 __fs32 fs_sparecon2[1]; 938 __fs32 fs_npsect; /* # sectors/track including spares */ 939 __fs32 fs_qbmask[2]; /* ~usb_bmask */ 940 __fs32 fs_qfmask[2]; /* ~usb_fmask */ 941 } fs_sunx86; 942 struct { 943 __fs32 fs_sparecon[50];/* reserved for future constants */ 944 __fs32 fs_contigsumsize;/* size of cluster summary array */ 945 __fs32 fs_maxsymlinklen;/* max length of an internal symlink */ 946 __fs32 fs_inodefmt; /* format of on-disk inodes */ 947 __fs32 fs_maxfilesize[2]; /* max representable file size */ 948 __fs32 fs_qbmask[2]; /* ~usb_bmask */ 949 __fs32 fs_qfmask[2]; /* ~usb_fmask */ 950 __fs32 fs_state; /* file system state time stamp */ 951 } fs_44; 952 } fs_un2; 953 __fs32 fs_postblformat; 954 __fs32 fs_nrpos; 955 __fs32 fs_postbloff; 956 __fs32 fs_rotbloff; 957 __fs32 fs_magic; 958 __u8 fs_space[1]; 959 }; 960 961 #endif /* __LINUX_UFS_FS_H */ 962