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1.1 ! root 1: /* $NetBSD: fs.h,v 1.66 2015/02/14 09:06:11 maxv Exp $ */ ! 2: ! 3: /* ! 4: * Copyright (c) 1982, 1986, 1993 ! 5: * The Regents of the University of California. All rights reserved. ! 6: * ! 7: * Redistribution and use in source and binary forms, with or without ! 8: * modification, are permitted provided that the following conditions ! 9: * are met: ! 10: * 1. Redistributions of source code must retain the above copyright ! 11: * notice, this list of conditions and the following disclaimer. ! 12: * 2. Redistributions in binary form must reproduce the above copyright ! 13: * notice, this list of conditions and the following disclaimer in the ! 14: * documentation and/or other materials provided with the distribution. ! 15: * 3. Neither the name of the University nor the names of its contributors ! 16: * may be used to endorse or promote products derived from this software ! 17: * without specific prior written permission. ! 18: * ! 19: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ! 20: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE ! 21: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ! 22: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE ! 23: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL ! 24: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS ! 25: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) ! 26: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT ! 27: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY ! 28: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF ! 29: * SUCH DAMAGE. ! 30: * ! 31: * @(#)fs.h 8.13 (Berkeley) 3/21/95 ! 32: */ ! 33: ! 34: /* ! 35: * NOTE: COORDINATE ON-DISK FORMAT CHANGES WITH THE FREEBSD PROJECT. ! 36: */ ! 37: ! 38: #ifndef _UFS_FFS_FS_H_ ! 39: #define _UFS_FFS_FS_H_ ! 40: ! 41: /* ! 42: * Each disk drive contains some number of file systems. ! 43: * A file system consists of a number of cylinder groups. ! 44: * Each cylinder group has inodes and data. ! 45: * ! 46: * A file system is described by its super-block, which in turn ! 47: * describes the cylinder groups. The super-block is critical ! 48: * data and is replicated in each cylinder group to protect against ! 49: * catastrophic loss. This is done at `newfs' time and the critical ! 50: * super-block data does not change, so the copies need not be ! 51: * referenced further unless disaster strikes. ! 52: * ! 53: * For file system fs, the offsets of the various blocks of interest ! 54: * are given in the super block as: ! 55: * [fs->fs_sblkno] Super-block ! 56: * [fs->fs_cblkno] Cylinder group block ! 57: * [fs->fs_iblkno] Inode blocks ! 58: * [fs->fs_dblkno] Data blocks ! 59: * The beginning of cylinder group cg in fs, is given by ! 60: * the ``cgbase(fs, cg)'' macro. ! 61: * ! 62: * Depending on the architecture and the media, the superblock may ! 63: * reside in any one of four places. For tiny media where every block ! 64: * counts, it is placed at the very front of the partition. Historically, ! 65: * UFS1 placed it 8K from the front to leave room for the disk label and ! 66: * a small bootstrap. For UFS2 it got moved to 64K from the front to leave ! 67: * room for the disk label and a bigger bootstrap, and for really piggy ! 68: * systems we check at 256K from the front if the first three fail. In ! 69: * all cases the size of the superblock will be SBLOCKSIZE. All values are ! 70: * given in byte-offset form, so they do not imply a sector size. The ! 71: * SBLOCKSEARCH specifies the order in which the locations should be searched. ! 72: * ! 73: * Unfortunately the UFS2/FFSv2 change was done without adequate consideration ! 74: * of backward compatibility. In particular 'newfs' for a FFSv2 partition ! 75: * must overwrite any old FFSv1 superblock at 8k, and preferably as many ! 76: * of the alternates as it can find - otherwise attempting to mount on a ! 77: * system that only supports FFSv1 is likely to succeed!. ! 78: * For a small FFSv1 filesystem, an old FFSv2 superblock can be left on ! 79: * the disk, and a system that tries to find an FFSv2 filesystem in preference ! 80: * to and FFSv1 one (as NetBSD does) can mount the old FFSv2 filesystem. ! 81: * As a added bonus, the 'first alternate' superblock of a FFSv1 filesystem ! 82: * with 64k blocks is at 64k - just where the code looks first when playing ! 83: * 'hunt the superblock'. ! 84: * ! 85: * The ffsv2 superblock layout (which might contain an ffsv1 filesystem) ! 86: * can be detected by checking for sb->fs_old_flags & FS_FLAGS_UPDATED. ! 87: * This is the default superblock type for NetBSD since ffsv2 support was added. ! 88: */ ! 89: #define BBSIZE 8192 ! 90: #define BBOFF ((off_t)(0)) ! 91: #define BBLOCK ((daddr_t)(0)) ! 92: ! 93: #define SBLOCK_FLOPPY 0 ! 94: #define SBLOCK_UFS1 8192 ! 95: #define SBLOCK_UFS2 65536 ! 96: #define SBLOCK_PIGGY 262144 ! 97: #define SBLOCKSIZE 8192 ! 98: /* ! 99: * NB: Do not, under any circumstances, look for an ffsv1 filesystem at ! 100: * SBLOCK_UFS2. Doing so will find the wrong superblock for filesystems ! 101: * with a 64k block size. ! 102: */ ! 103: #define SBLOCKSEARCH \ ! 104: { SBLOCK_UFS2, SBLOCK_UFS1, SBLOCK_FLOPPY, SBLOCK_PIGGY, -1 } ! 105: ! 106: /* ! 107: * Max number of fragments per block. This value is NOT tweakable. ! 108: */ ! 109: #define MAXFRAG 8 ! 110: ! 111: ! 112: ! 113: /* ! 114: * Addresses stored in inodes are capable of addressing fragments ! 115: * of `blocks'. File system blocks of at most size MAXBSIZE can ! 116: * be optionally broken into 2, 4, or 8 pieces, each of which is ! 117: * addressable; these pieces may be DEV_BSIZE, or some multiple of ! 118: * a DEV_BSIZE unit. ! 119: * ! 120: * Large files consist of exclusively large data blocks. To avoid ! 121: * undue wasted disk space, the last data block of a small file may be ! 122: * allocated as only as many fragments of a large block as are ! 123: * necessary. The file system format retains only a single pointer ! 124: * to such a fragment, which is a piece of a single large block that ! 125: * has been divided. The size of such a fragment is determinable from ! 126: * information in the inode, using the ``ffs_blksize(fs, ip, lbn)'' macro. ! 127: * ! 128: * The file system records space availability at the fragment level; ! 129: * to determine block availability, aligned fragments are examined. ! 130: */ ! 131: ! 132: /* ! 133: * MINBSIZE is the smallest allowable block size. ! 134: * In order to insure that it is possible to create files of size ! 135: * 2^32 with only two levels of indirection, MINBSIZE is set to 4096. ! 136: * MINBSIZE must be big enough to hold a cylinder group block, ! 137: * thus changes to (struct cg) must keep its size within MINBSIZE. ! 138: * Note that super blocks are always of size SBSIZE, ! 139: * and that both SBSIZE and MAXBSIZE must be >= MINBSIZE. ! 140: */ ! 141: #define MINBSIZE 4096 ! 142: ! 143: /* ! 144: * The path name on which the file system is mounted is maintained ! 145: * in fs_fsmnt. MAXMNTLEN defines the amount of space allocated in ! 146: * the super block for this name. ! 147: */ ! 148: #define MAXMNTLEN 468 ! 149: ! 150: /* ! 151: * The volume name for this filesystem is maintained in fs_volname. ! 152: * MAXVOLLEN defines the length of the buffer allocated. ! 153: * This space used to be part of of fs_fsmnt. ! 154: */ ! 155: #define MAXVOLLEN 32 ! 156: ! 157: /* ! 158: * There is a 128-byte region in the superblock reserved for in-core ! 159: * pointers to summary information. Originally this included an array ! 160: * of pointers to blocks of struct csum; now there are just four ! 161: * pointers and the remaining space is padded with fs_ocsp[]. ! 162: * NOCSPTRS determines the size of this padding. One pointer (fs_csp) ! 163: * is taken away to point to a contiguous array of struct csum for ! 164: * all cylinder groups; a second (fs_maxcluster) points to an array ! 165: * of cluster sizes that is computed as cylinder groups are inspected; ! 166: * the third (fs_contigdirs) points to an array that tracks the ! 167: * creation of new directories; and the fourth (fs_active) is used ! 168: * by snapshots. ! 169: */ ! 170: #define NOCSPTRS ((128 / sizeof(void *)) - 4) ! 171: ! 172: /* ! 173: * A summary of contiguous blocks of various sizes is maintained ! 174: * in each cylinder group. Normally this is set by the initial ! 175: * value of fs_maxcontig. To conserve space, a maximum summary size ! 176: * is set by FS_MAXCONTIG. ! 177: */ ! 178: #define FS_MAXCONTIG 16 ! 179: ! 180: /* ! 181: * The maximum number of snapshot nodes that can be associated ! 182: * with each filesystem. This limit affects only the number of ! 183: * snapshot files that can be recorded within the superblock so ! 184: * that they can be found when the filesystem is mounted. However, ! 185: * maintaining too many will slow the filesystem performance, so ! 186: * having this limit is a good idea. ! 187: */ ! 188: #define FSMAXSNAP 20 ! 189: ! 190: /* ! 191: * Used to identify special blocks in snapshots: ! 192: * ! 193: * BLK_NOCOPY - A block that was unallocated at the time the snapshot ! 194: * was taken, hence does not need to be copied when written. ! 195: * BLK_SNAP - A block held by another snapshot that is not needed by this ! 196: * snapshot. When the other snapshot is freed, the BLK_SNAP entries ! 197: * are converted to BLK_NOCOPY. These are needed to allow fsck to ! 198: * identify blocks that are in use by other snapshots (which are ! 199: * expunged from this snapshot). ! 200: */ ! 201: #define BLK_NOCOPY ((daddr_t)(1)) ! 202: #define BLK_SNAP ((daddr_t)(2)) ! 203: ! 204: /* ! 205: * MINFREE gives the minimum acceptable percentage of file system ! 206: * blocks which may be free. If the freelist drops below this level ! 207: * only the superuser may continue to allocate blocks. This may ! 208: * be set to 0 if no reserve of free blocks is deemed necessary, ! 209: * however throughput drops by fifty percent if the file system ! 210: * is run at between 95% and 100% full; thus the minimum default ! 211: * value of fs_minfree is 5%. However, to get good clustering ! 212: * performance, 10% is a better choice. This value is used only ! 213: * when creating a file system and can be overridden from the ! 214: * command line. By default we choose to optimize for time. ! 215: */ ! 216: #define MINFREE 5 ! 217: #define DEFAULTOPT FS_OPTTIME ! 218: ! 219: /* ! 220: * Grigoriy Orlov <[email protected]> has done some extensive work to fine ! 221: * tune the layout preferences for directories within a filesystem. ! 222: * His algorithm can be tuned by adjusting the following parameters ! 223: * which tell the system the average file size and the average number ! 224: * of files per directory. These defaults are well selected for typical ! 225: * filesystems, but may need to be tuned for odd cases like filesystems ! 226: * being used for squid caches or news spools. ! 227: */ ! 228: #define AVFILESIZ 16384 /* expected average file size */ ! 229: #define AFPDIR 64 /* expected number of files per directory */ ! 230: ! 231: /* ! 232: * Per cylinder group information; summarized in blocks allocated ! 233: * from first cylinder group data blocks. These blocks have to be ! 234: * read in from fs_csaddr (size fs_cssize) in addition to the ! 235: * super block. ! 236: */ ! 237: struct csum { ! 238: int32_t cs_ndir; /* number of directories */ ! 239: int32_t cs_nbfree; /* number of free blocks */ ! 240: int32_t cs_nifree; /* number of free inodes */ ! 241: int32_t cs_nffree; /* number of free frags */ ! 242: }; ! 243: ! 244: struct csum_total { ! 245: int64_t cs_ndir; /* number of directories */ ! 246: int64_t cs_nbfree; /* number of free blocks */ ! 247: int64_t cs_nifree; /* number of free inodes */ ! 248: int64_t cs_nffree; /* number of free frags */ ! 249: int64_t cs_spare[4]; /* future expansion */ ! 250: }; ! 251: ! 252: ! 253: /* ! 254: * Super block for an FFS file system in memory. ! 255: */ ! 256: struct fs { ! 257: int32_t fs_firstfield; /* historic file system linked list, */ ! 258: int32_t fs_unused_1; /* used for incore super blocks */ ! 259: int32_t fs_sblkno; /* addr of super-block in filesys */ ! 260: int32_t fs_cblkno; /* offset of cyl-block in filesys */ ! 261: int32_t fs_iblkno; /* offset of inode-blocks in filesys */ ! 262: int32_t fs_dblkno; /* offset of first data after cg */ ! 263: int32_t fs_old_cgoffset; /* cylinder group offset in cylinder */ ! 264: int32_t fs_old_cgmask; /* used to calc mod fs_ntrak */ ! 265: int32_t fs_old_time; /* last time written */ ! 266: int32_t fs_old_size; /* number of blocks in fs */ ! 267: int32_t fs_old_dsize; /* number of data blocks in fs */ ! 268: int32_t fs_ncg; /* number of cylinder groups */ ! 269: int32_t fs_bsize; /* size of basic blocks in fs */ ! 270: int32_t fs_fsize; /* size of frag blocks in fs */ ! 271: int32_t fs_frag; /* number of frags in a block in fs */ ! 272: /* these are configuration parameters */ ! 273: int32_t fs_minfree; /* minimum percentage of free blocks */ ! 274: int32_t fs_old_rotdelay; /* num of ms for optimal next block */ ! 275: int32_t fs_old_rps; /* disk revolutions per second */ ! 276: /* these fields can be computed from the others */ ! 277: int32_t fs_bmask; /* ``blkoff'' calc of blk offsets */ ! 278: int32_t fs_fmask; /* ``fragoff'' calc of frag offsets */ ! 279: int32_t fs_bshift; /* ``lblkno'' calc of logical blkno */ ! 280: int32_t fs_fshift; /* ``numfrags'' calc number of frags */ ! 281: /* these are configuration parameters */ ! 282: int32_t fs_maxcontig; /* max number of contiguous blks */ ! 283: int32_t fs_maxbpg; /* max number of blks per cyl group */ ! 284: /* these fields can be computed from the others */ ! 285: int32_t fs_fragshift; /* block to frag shift */ ! 286: int32_t fs_fsbtodb; /* fsbtodb and dbtofsb shift constant */ ! 287: int32_t fs_sbsize; /* actual size of super block */ ! 288: int32_t fs_spare1[2]; /* old fs_csmask */ ! 289: /* old fs_csshift */ ! 290: int32_t fs_nindir; /* value of FFS_NINDIR */ ! 291: int32_t fs_inopb; /* value of FFS_INOPB */ ! 292: int32_t fs_old_nspf; /* value of NSPF */ ! 293: /* yet another configuration parameter */ ! 294: int32_t fs_optim; /* optimization preference, see below */ ! 295: /* these fields are derived from the hardware */ ! 296: int32_t fs_old_npsect; /* # sectors/track including spares */ ! 297: int32_t fs_old_interleave; /* hardware sector interleave */ ! 298: int32_t fs_old_trackskew; /* sector 0 skew, per track */ ! 299: /* fs_id takes the space of the unused fs_headswitch and fs_trkseek fields */ ! 300: int32_t fs_id[2]; /* unique file system id */ ! 301: /* sizes determined by number of cylinder groups and their sizes */ ! 302: int32_t fs_old_csaddr; /* blk addr of cyl grp summary area */ ! 303: int32_t fs_cssize; /* size of cyl grp summary area */ ! 304: int32_t fs_cgsize; /* cylinder group size */ ! 305: /* these fields are derived from the hardware */ ! 306: int32_t fs_spare2; /* old fs_ntrak */ ! 307: int32_t fs_old_nsect; /* sectors per track */ ! 308: int32_t fs_old_spc; /* sectors per cylinder */ ! 309: int32_t fs_old_ncyl; /* cylinders in file system */ ! 310: int32_t fs_old_cpg; /* cylinders per group */ ! 311: int32_t fs_ipg; /* inodes per group */ ! 312: int32_t fs_fpg; /* blocks per group * fs_frag */ ! 313: /* this data must be re-computed after crashes */ ! 314: struct csum fs_old_cstotal; /* cylinder summary information */ ! 315: /* these fields are cleared at mount time */ ! 316: int8_t fs_fmod; /* super block modified flag */ ! 317: uint8_t fs_clean; /* file system is clean flag */ ! 318: int8_t fs_ronly; /* mounted read-only flag */ ! 319: uint8_t fs_old_flags; /* see FS_ flags below */ ! 320: u_char fs_fsmnt[MAXMNTLEN]; /* name mounted on */ ! 321: u_char fs_volname[MAXVOLLEN]; /* volume name */ ! 322: uint64_t fs_swuid; /* system-wide uid */ ! 323: int32_t fs_pad; ! 324: /* these fields retain the current block allocation info */ ! 325: int32_t fs_cgrotor; /* last cg searched (UNUSED) */ ! 326: void *fs_ocsp[NOCSPTRS]; /* padding; was list of fs_cs buffers */ ! 327: u_int8_t *fs_contigdirs; /* # of contiguously allocated dirs */ ! 328: struct csum *fs_csp; /* cg summary info buffer for fs_cs */ ! 329: int32_t *fs_maxcluster; /* max cluster in each cyl group */ ! 330: u_char *fs_active; /* used by snapshots to track fs */ ! 331: int32_t fs_old_cpc; /* cyl per cycle in postbl */ ! 332: /* this area is otherwise allocated unless fs_old_flags & FS_FLAGS_UPDATED */ ! 333: int32_t fs_maxbsize; /* maximum blocking factor permitted */ ! 334: uint8_t fs_journal_version; /* journal format version */ ! 335: uint8_t fs_journal_location; /* journal location type */ ! 336: uint8_t fs_journal_reserved[2];/* reserved for future use */ ! 337: uint32_t fs_journal_flags; /* journal flags */ ! 338: uint64_t fs_journallocs[4]; /* location info for journal */ ! 339: uint32_t fs_quota_magic; /* see quota2.h */ ! 340: uint8_t fs_quota_flags; /* see quota2.h */ ! 341: uint8_t fs_quota_reserved[3]; ! 342: uint64_t fs_quotafile[2]; /* pointer to quota inodes */ ! 343: int64_t fs_sparecon64[9]; /* reserved for future use */ ! 344: int64_t fs_sblockloc; /* byte offset of standard superblock */ ! 345: struct csum_total fs_cstotal; /* cylinder summary information */ ! 346: int64_t fs_time; /* last time written */ ! 347: int64_t fs_size; /* number of blocks in fs */ ! 348: int64_t fs_dsize; /* number of data blocks in fs */ ! 349: int64_t fs_csaddr; /* blk addr of cyl grp summary area */ ! 350: int64_t fs_pendingblocks; /* blocks in process of being freed */ ! 351: int32_t fs_pendinginodes; /* inodes in process of being freed */ ! 352: int32_t fs_snapinum[FSMAXSNAP];/* list of snapshot inode numbers */ ! 353: /* back to stuff that has been around a while */ ! 354: int32_t fs_avgfilesize; /* expected average file size */ ! 355: int32_t fs_avgfpdir; /* expected # of files per directory */ ! 356: int32_t fs_save_cgsize; /* save real cg size to use fs_bsize */ ! 357: int32_t fs_sparecon32[26]; /* reserved for future constants */ ! 358: uint32_t fs_flags; /* see FS_ flags below */ ! 359: /* back to stuff that has been around a while (again) */ ! 360: int32_t fs_contigsumsize; /* size of cluster summary array */ ! 361: int32_t fs_maxsymlinklen; /* max length of an internal symlink */ ! 362: int32_t fs_old_inodefmt; /* format of on-disk inodes */ ! 363: u_int64_t fs_maxfilesize; /* maximum representable file size */ ! 364: int64_t fs_qbmask; /* ~fs_bmask for use with 64-bit size */ ! 365: int64_t fs_qfmask; /* ~fs_fmask for use with 64-bit size */ ! 366: int32_t fs_state; /* validate fs_clean field (UNUSED) */ ! 367: int32_t fs_old_postblformat; /* format of positional layout tables */ ! 368: int32_t fs_old_nrpos; /* number of rotational positions */ ! 369: int32_t fs_spare5[2]; /* old fs_postbloff */ ! 370: /* old fs_rotbloff */ ! 371: int32_t fs_magic; /* magic number */ ! 372: }; ! 373: ! 374: #define fs_old_postbloff fs_spare5[0] ! 375: #define fs_old_rotbloff fs_spare5[1] ! 376: #define fs_old_postbl_start fs_maxbsize ! 377: #define fs_old_headswitch fs_id[0] ! 378: #define fs_old_trkseek fs_id[1] ! 379: #define fs_old_csmask fs_spare1[0] ! 380: #define fs_old_csshift fs_spare1[1] ! 381: ! 382: #define FS_42POSTBLFMT -1 /* 4.2BSD rotational table format */ ! 383: #define FS_DYNAMICPOSTBLFMT 1 /* dynamic rotational table format */ ! 384: ! 385: #define old_fs_postbl(fs_, cylno, opostblsave) \ ! 386: ((((fs_)->fs_old_postblformat == FS_42POSTBLFMT) || \ ! 387: ((fs_)->fs_old_postbloff == offsetof(struct fs, fs_old_postbl_start))) \ ! 388: ? ((int16_t *)(opostblsave) + (cylno) * (fs_)->fs_old_nrpos) \ ! 389: : ((int16_t *)((uint8_t *)(fs_) + \ ! 390: (fs_)->fs_old_postbloff) + (cylno) * (fs_)->fs_old_nrpos)) ! 391: #define old_fs_rotbl(fs) \ ! 392: (((fs)->fs_old_postblformat == FS_42POSTBLFMT) \ ! 393: ? ((uint8_t *)(&(fs)->fs_magic+1)) \ ! 394: : ((uint8_t *)((uint8_t *)(fs) + (fs)->fs_old_rotbloff))) ! 395: ! 396: /* ! 397: * File system identification ! 398: */ ! 399: #define FS_UFS1_MAGIC 0x011954 /* UFS1 fast file system magic number */ ! 400: #define FS_UFS2_MAGIC 0x19540119 /* UFS2 fast file system magic number */ ! 401: #define FS_UFS1_MAGIC_SWAPPED 0x54190100 ! 402: #define FS_UFS2_MAGIC_SWAPPED 0x19015419 ! 403: #define FS_OKAY 0x7c269d38 /* superblock checksum */ ! 404: #define FS_42INODEFMT -1 /* 4.2BSD inode format */ ! 405: #define FS_44INODEFMT 2 /* 4.4BSD inode format */ ! 406: ! 407: /* ! 408: * File system clean flags ! 409: */ ! 410: #define FS_ISCLEAN 0x01 ! 411: #define FS_WASCLEAN 0x02 ! 412: ! 413: /* ! 414: * Preference for optimization. ! 415: */ ! 416: #define FS_OPTTIME 0 /* minimize allocation time */ ! 417: #define FS_OPTSPACE 1 /* minimize disk fragmentation */ ! 418: ! 419: /* ! 420: * File system flags ! 421: */ ! 422: #define FS_UNCLEAN 0x001 /* file system not clean at mount (unused) */ ! 423: #define FS_DOSOFTDEP 0x002 /* file system using soft dependencies */ ! 424: #define FS_NEEDSFSCK 0x004 /* needs sync fsck (FreeBSD compat, unused) */ ! 425: #define FS_SUJ 0x008 /* file system using journaled softupdates */ ! 426: #define FS_ACLS 0x010 /* file system has ACLs enabled */ ! 427: #define FS_MULTILABEL 0x020 /* file system is MAC multi-label */ ! 428: #define FS_GJOURNAL 0x40 /* gjournaled file system */ ! 429: #define FS_FLAGS_UPDATED 0x80 /* flags have been moved to new location */ ! 430: #define FS_DOWAPBL 0x100 /* Write ahead physical block logging */ ! 431: /* FS_NFS4ACLS 0x100 file system has NFSv4 ACLs enabled (FBSD) */ ! 432: #define FS_DOQUOTA2 0x200 /* in-filesystem quotas */ ! 433: /* FS_INDEXDIRS 0x200 kernel supports indexed directories (FBSD)*/ ! 434: #define FS_TRIM 0x400 /* discard deleted blocks in storage layer */ ! 435: ! 436: /* File system flags that are ok for NetBSD if set in fs_flags */ ! 437: #define FS_KNOWN_FLAGS (FS_DOSOFTDEP | FS_DOWAPBL | FS_DOQUOTA2) ! 438: ! 439: /* ! 440: * File system internal flags, also in fs_flags. ! 441: * (Pick highest number to avoid conflicts with others) ! 442: */ ! 443: #define FS_SWAPPED 0x80000000 /* file system is endian swapped */ ! 444: #define FS_INTERNAL 0x80000000 /* mask for internal flags */ ! 445: ! 446: /* ! 447: * Macros to access bits in the fs_active array. ! 448: */ ! 449: #define ACTIVECG_SET(fs, cg) \ ! 450: do { \ ! 451: if ((fs)->fs_active != NULL) \ ! 452: setbit((fs)->fs_active, (cg)); \ ! 453: } while (/*CONSTCOND*/ 0) ! 454: #define ACTIVECG_CLR(fs, cg) \ ! 455: do { \ ! 456: if ((fs)->fs_active != NULL) \ ! 457: clrbit((fs)->fs_active, (cg)); \ ! 458: } while (/*CONSTCOND*/ 0) ! 459: #define ACTIVECG_ISSET(fs, cg) \ ! 460: ((fs)->fs_active != NULL && isset((fs)->fs_active, (cg))) ! 461: ! 462: /* ! 463: * The size of a cylinder group is calculated by CGSIZE. The maximum size ! 464: * is limited by the fact that cylinder groups are at most one block. ! 465: * Its size is derived from the size of the maps maintained in the ! 466: * cylinder group and the (struct cg) size. ! 467: */ ! 468: #define CGSIZE_IF(fs, ipg, fpg) \ ! 469: /* base cg */ (sizeof(struct cg) + sizeof(int32_t) + \ ! 470: /* old btotoff */ (fs)->fs_old_cpg * sizeof(int32_t) + \ ! 471: /* old boff */ (fs)->fs_old_cpg * sizeof(u_int16_t) + \ ! 472: /* inode map */ howmany((ipg), NBBY) + \ ! 473: /* block map */ howmany((fpg), NBBY) +\ ! 474: /* if present */ ((fs)->fs_contigsumsize <= 0 ? 0 : \ ! 475: /* cluster sum */ (fs)->fs_contigsumsize * sizeof(int32_t) + \ ! 476: /* cluster map */ howmany(ffs_fragstoblks(fs, (fpg)), NBBY))) ! 477: ! 478: #define CGSIZE(fs) CGSIZE_IF((fs), (fs)->fs_ipg, (fs)->fs_fpg) ! 479: ! 480: /* ! 481: * The minimal number of cylinder groups that should be created. ! 482: */ ! 483: #define MINCYLGRPS 4 ! 484: ! 485: ! 486: /* ! 487: * Convert cylinder group to base address of its global summary info. ! 488: */ ! 489: #define fs_cs(fs, indx) fs_csp[indx] ! 490: ! 491: /* ! 492: * Cylinder group block for a file system. ! 493: */ ! 494: #define CG_MAGIC 0x090255 ! 495: struct cg { ! 496: int32_t cg_firstfield; /* historic cyl groups linked list */ ! 497: int32_t cg_magic; /* magic number */ ! 498: int32_t cg_old_time; /* time last written */ ! 499: int32_t cg_cgx; /* we are the cgx'th cylinder group */ ! 500: int16_t cg_old_ncyl; /* number of cyl's this cg */ ! 501: int16_t cg_old_niblk; /* number of inode blocks this cg */ ! 502: int32_t cg_ndblk; /* number of data blocks this cg */ ! 503: struct csum cg_cs; /* cylinder summary information */ ! 504: int32_t cg_rotor; /* position of last used block */ ! 505: int32_t cg_frotor; /* position of last used frag */ ! 506: int32_t cg_irotor; /* position of last used inode */ ! 507: int32_t cg_frsum[MAXFRAG]; /* counts of available frags */ ! 508: int32_t cg_old_btotoff; /* (int32) block totals per cylinder */ ! 509: int32_t cg_old_boff; /* (u_int16) free block positions */ ! 510: int32_t cg_iusedoff; /* (u_int8) used inode map */ ! 511: int32_t cg_freeoff; /* (u_int8) free block map */ ! 512: int32_t cg_nextfreeoff; /* (u_int8) next available space */ ! 513: int32_t cg_clustersumoff; /* (u_int32) counts of avail clusters */ ! 514: int32_t cg_clusteroff; /* (u_int8) free cluster map */ ! 515: int32_t cg_nclusterblks; /* number of clusters this cg */ ! 516: int32_t cg_niblk; /* number of inode blocks this cg */ ! 517: int32_t cg_initediblk; /* last initialized inode */ ! 518: int32_t cg_sparecon32[3]; /* reserved for future use */ ! 519: int64_t cg_time; /* time last written */ ! 520: int64_t cg_sparecon64[3]; /* reserved for future use */ ! 521: u_int8_t cg_space[1]; /* space for cylinder group maps */ ! 522: /* actually longer */ ! 523: }; ! 524: ! 525: /* ! 526: * The following structure is defined ! 527: * for compatibility with old file systems. ! 528: */ ! 529: struct ocg { ! 530: int32_t cg_firstfield; /* historic linked list of cyl groups */ ! 531: int32_t cg_unused_1; /* used for incore cyl groups */ ! 532: int32_t cg_time; /* time last written */ ! 533: int32_t cg_cgx; /* we are the cgx'th cylinder group */ ! 534: int16_t cg_ncyl; /* number of cyl's this cg */ ! 535: int16_t cg_niblk; /* number of inode blocks this cg */ ! 536: int32_t cg_ndblk; /* number of data blocks this cg */ ! 537: struct csum cg_cs; /* cylinder summary information */ ! 538: int32_t cg_rotor; /* position of last used block */ ! 539: int32_t cg_frotor; /* position of last used frag */ ! 540: int32_t cg_irotor; /* position of last used inode */ ! 541: int32_t cg_frsum[8]; /* counts of available frags */ ! 542: int32_t cg_btot[32]; /* block totals per cylinder */ ! 543: int16_t cg_b[32][8]; /* positions of free blocks */ ! 544: u_int8_t cg_iused[256]; /* used inode map */ ! 545: int32_t cg_magic; /* magic number */ ! 546: u_int8_t cg_free[1]; /* free block map */ ! 547: /* actually longer */ ! 548: }; ! 549: ! 550: ! 551: /* ! 552: * Macros for access to cylinder group array structures. ! 553: */ ! 554: #define old_cg_blktot_old(cgp, ns) \ ! 555: (((struct ocg *)(cgp))->cg_btot) ! 556: #define old_cg_blks_old(fs, cgp, cylno, ns) \ ! 557: (((struct ocg *)(cgp))->cg_b[cylno]) ! 558: ! 559: #define old_cg_blktot_new(cgp, ns) \ ! 560: ((int32_t *)((u_int8_t *)(cgp) + \ ! 561: ufs_rw32((cgp)->cg_old_btotoff, (ns)))) ! 562: #define old_cg_blks_new(fs, cgp, cylno, ns) \ ! 563: ((int16_t *)((u_int8_t *)(cgp) + \ ! 564: ufs_rw32((cgp)->cg_old_boff, (ns))) + (cylno) * (fs)->fs_old_nrpos) ! 565: ! 566: #define old_cg_blktot(cgp, ns) \ ! 567: ((ufs_rw32((cgp)->cg_magic, (ns)) != CG_MAGIC) ? \ ! 568: old_cg_blktot_old(cgp, ns) : old_cg_blktot_new(cgp, ns)) ! 569: #define old_cg_blks(fs, cgp, cylno, ns) \ ! 570: ((ufs_rw32((cgp)->cg_magic, (ns)) != CG_MAGIC) ? \ ! 571: old_cg_blks_old(fs, cgp, cylno, ns) : old_cg_blks_new(fs, cgp, cylno, ns)) ! 572: ! 573: #define cg_inosused_new(cgp, ns) \ ! 574: ((u_int8_t *)((u_int8_t *)(cgp) + \ ! 575: ufs_rw32((cgp)->cg_iusedoff, (ns)))) ! 576: #define cg_blksfree_new(cgp, ns) \ ! 577: ((u_int8_t *)((u_int8_t *)(cgp) + \ ! 578: ufs_rw32((cgp)->cg_freeoff, (ns)))) ! 579: #define cg_chkmagic_new(cgp, ns) \ ! 580: (ufs_rw32((cgp)->cg_magic, (ns)) == CG_MAGIC) ! 581: ! 582: #define cg_inosused_old(cgp, ns) \ ! 583: (((struct ocg *)(cgp))->cg_iused) ! 584: #define cg_blksfree_old(cgp, ns) \ ! 585: (((struct ocg *)(cgp))->cg_free) ! 586: #define cg_chkmagic_old(cgp, ns) \ ! 587: (ufs_rw32(((struct ocg *)(cgp))->cg_magic, (ns)) == CG_MAGIC) ! 588: ! 589: #define cg_inosused(cgp, ns) \ ! 590: ((ufs_rw32((cgp)->cg_magic, (ns)) != CG_MAGIC) ? \ ! 591: cg_inosused_old(cgp, ns) : cg_inosused_new(cgp, ns)) ! 592: #define cg_blksfree(cgp, ns) \ ! 593: ((ufs_rw32((cgp)->cg_magic, (ns)) != CG_MAGIC) ? \ ! 594: cg_blksfree_old(cgp, ns) : cg_blksfree_new(cgp, ns)) ! 595: #define cg_chkmagic(cgp, ns) \ ! 596: (cg_chkmagic_new(cgp, ns) || cg_chkmagic_old(cgp, ns)) ! 597: ! 598: #define cg_clustersfree(cgp, ns) \ ! 599: ((u_int8_t *)((u_int8_t *)(cgp) + \ ! 600: ufs_rw32((cgp)->cg_clusteroff, (ns)))) ! 601: #define cg_clustersum(cgp, ns) \ ! 602: ((int32_t *)((u_int8_t *)(cgp) + \ ! 603: ufs_rw32((cgp)->cg_clustersumoff, (ns)))) ! 604: ! 605: ! 606: /* ! 607: * Turn file system block numbers into disk block addresses. ! 608: * This maps file system blocks to device size blocks. ! 609: */ ! 610: #if defined (_KERNEL) ! 611: #define FFS_FSBTODB(fs, b) ((b) << ((fs)->fs_fshift - DEV_BSHIFT)) ! 612: #define FFS_DBTOFSB(fs, b) ((b) >> ((fs)->fs_fshift - DEV_BSHIFT)) ! 613: #else ! 614: #define FFS_FSBTODB(fs, b) ((b) << (fs)->fs_fsbtodb) ! 615: #define FFS_DBTOFSB(fs, b) ((b) >> (fs)->fs_fsbtodb) ! 616: #endif ! 617: ! 618: /* ! 619: * Cylinder group macros to locate things in cylinder groups. ! 620: * They calc file system addresses of cylinder group data structures. ! 621: */ ! 622: #define cgbase(fs, c) (((daddr_t)(fs)->fs_fpg) * (c)) ! 623: #define cgstart_ufs1(fs, c) \ ! 624: (cgbase(fs, c) + (fs)->fs_old_cgoffset * ((c) & ~((fs)->fs_old_cgmask))) ! 625: #define cgstart_ufs2(fs, c) cgbase((fs), (c)) ! 626: #define cgstart(fs, c) ((fs)->fs_magic == FS_UFS2_MAGIC \ ! 627: ? cgstart_ufs2((fs), (c)) : cgstart_ufs1((fs), (c))) ! 628: #define cgdmin(fs, c) (cgstart(fs, c) + (fs)->fs_dblkno) /* 1st data */ ! 629: #define cgimin(fs, c) (cgstart(fs, c) + (fs)->fs_iblkno) /* inode blk */ ! 630: #define cgsblock(fs, c) (cgstart(fs, c) + (fs)->fs_sblkno) /* super blk */ ! 631: #define cgtod(fs, c) (cgstart(fs, c) + (fs)->fs_cblkno) /* cg block */ ! 632: ! 633: /* ! 634: * Macros for handling inode numbers: ! 635: * inode number to file system block offset. ! 636: * inode number to cylinder group number. ! 637: * inode number to file system block address. ! 638: */ ! 639: #define ino_to_cg(fs, x) ((x) / (fs)->fs_ipg) ! 640: #define ino_to_fsba(fs, x) \ ! 641: ((daddr_t)(cgimin(fs, ino_to_cg(fs, x)) + \ ! 642: (ffs_blkstofrags((fs), (((x) % (fs)->fs_ipg) / FFS_INOPB(fs)))))) ! 643: #define ino_to_fsbo(fs, x) ((x) % FFS_INOPB(fs)) ! 644: ! 645: /* ! 646: * Give cylinder group number for a file system block. ! 647: * Give cylinder group block number for a file system block. ! 648: */ ! 649: #define dtog(fs, d) ((d) / (fs)->fs_fpg) ! 650: #define dtogd(fs, d) ((d) % (fs)->fs_fpg) ! 651: ! 652: /* ! 653: * Extract the bits for a block from a map. ! 654: * Compute the cylinder and rotational position of a cyl block addr. ! 655: */ ! 656: #define blkmap(fs, map, loc) \ ! 657: (((map)[(loc) / NBBY] >> ((loc) % NBBY)) & (0xff >> (NBBY - (fs)->fs_frag))) ! 658: #define old_cbtocylno(fs, bno) \ ! 659: (FFS_FSBTODB(fs, bno) / (fs)->fs_old_spc) ! 660: #define old_cbtorpos(fs, bno) \ ! 661: ((fs)->fs_old_nrpos <= 1 ? 0 : \ ! 662: (FFS_FSBTODB(fs, bno) % (fs)->fs_old_spc / (fs)->fs_old_nsect * (fs)->fs_old_trackskew + \ ! 663: FFS_FSBTODB(fs, bno) % (fs)->fs_old_spc % (fs)->fs_old_nsect * (fs)->fs_old_interleave) % \ ! 664: (fs)->fs_old_nsect * (fs)->fs_old_nrpos / (fs)->fs_old_npsect) ! 665: ! 666: /* ! 667: * The following macros optimize certain frequently calculated ! 668: * quantities by using shifts and masks in place of divisions ! 669: * modulos and multiplications. ! 670: */ ! 671: #define ffs_blkoff(fs, loc) /* calculates (loc % fs->fs_bsize) */ \ ! 672: ((loc) & (fs)->fs_qbmask) ! 673: #define ffs_fragoff(fs, loc) /* calculates (loc % fs->fs_fsize) */ \ ! 674: ((loc) & (fs)->fs_qfmask) ! 675: #define ffs_lfragtosize(fs, frag) /* calculates ((off_t)frag * fs->fs_fsize) */ \ ! 676: (((off_t)(frag)) << (fs)->fs_fshift) ! 677: #define ffs_lblktosize(fs, blk) /* calculates ((off_t)blk * fs->fs_bsize) */ \ ! 678: ((uint64_t)(((off_t)(blk)) << (fs)->fs_bshift)) ! 679: #define ffs_lblkno(fs, loc) /* calculates (loc / fs->fs_bsize) */ \ ! 680: ((loc) >> (fs)->fs_bshift) ! 681: #define ffs_numfrags(fs, loc) /* calculates (loc / fs->fs_fsize) */ \ ! 682: ((loc) >> (fs)->fs_fshift) ! 683: #define ffs_blkroundup(fs, size) /* calculates roundup(size, fs->fs_bsize) */ \ ! 684: (((size) + (fs)->fs_qbmask) & (fs)->fs_bmask) ! 685: #define ffs_fragroundup(fs, size) /* calculates roundup(size, fs->fs_fsize) */ \ ! 686: (((size) + (fs)->fs_qfmask) & (fs)->fs_fmask) ! 687: #define ffs_fragstoblks(fs, frags) /* calculates (frags / fs->fs_frag) */ \ ! 688: ((frags) >> (fs)->fs_fragshift) ! 689: #define ffs_blkstofrags(fs, blks) /* calculates (blks * fs->fs_frag) */ \ ! 690: ((blks) << (fs)->fs_fragshift) ! 691: #define ffs_fragnum(fs, fsb) /* calculates (fsb % fs->fs_frag) */ \ ! 692: ((fsb) & ((fs)->fs_frag - 1)) ! 693: #define ffs_blknum(fs, fsb) /* calculates rounddown(fsb, fs->fs_frag) */ \ ! 694: ((fsb) &~ ((fs)->fs_frag - 1)) ! 695: ! 696: /* ! 697: * Determine the number of available frags given a ! 698: * percentage to hold in reserve. ! 699: */ ! 700: #define freespace(fs, percentreserved) \ ! 701: (ffs_blkstofrags((fs), (fs)->fs_cstotal.cs_nbfree) + \ ! 702: (fs)->fs_cstotal.cs_nffree - \ ! 703: (((off_t)((fs)->fs_dsize)) * (percentreserved) / 100)) ! 704: ! 705: /* ! 706: * Determining the size of a file block in the file system. ! 707: */ ! 708: #define ffs_blksize(fs, ip, lbn) \ ! 709: (((lbn) >= UFS_NDADDR || (ip)->i_size >= ffs_lblktosize(fs, (lbn) + 1)) \ ! 710: ? (fs)->fs_bsize \ ! 711: : ((int32_t)ffs_fragroundup(fs, ffs_blkoff(fs, (ip)->i_size)))) ! 712: ! 713: #define ffs_sblksize(fs, size, lbn) \ ! 714: (((lbn) >= UFS_NDADDR || (size) >= ((lbn) + 1) << (fs)->fs_bshift) \ ! 715: ? (fs)->fs_bsize \ ! 716: : ((int32_t)ffs_fragroundup(fs, ffs_blkoff(fs, (uint64_t)(size))))) ! 717: ! 718: ! 719: /* ! 720: * Number of inodes in a secondary storage block/fragment. ! 721: */ ! 722: #define FFS_INOPB(fs) ((fs)->fs_inopb) ! 723: #define FFS_INOPF(fs) ((fs)->fs_inopb >> (fs)->fs_fragshift) ! 724: ! 725: /* ! 726: * Number of indirects in a file system block. ! 727: */ ! 728: #define FFS_NINDIR(fs) ((fs)->fs_nindir) ! 729: ! 730: /* ! 731: * Apple UFS Label: ! 732: * We check for this to decide to use APPLEUFS_DIRBLKSIZ ! 733: */ ! 734: #define APPLEUFS_LABEL_MAGIC 0x4c41424c /* LABL */ ! 735: #define APPLEUFS_LABEL_SIZE 1024 ! 736: #define APPLEUFS_LABEL_OFFSET (BBSIZE - APPLEUFS_LABEL_SIZE) /* located at 7k */ ! 737: #define APPLEUFS_LABEL_VERSION 1 ! 738: #define APPLEUFS_MAX_LABEL_NAME 512 ! 739: ! 740: struct appleufslabel { ! 741: u_int32_t ul_magic; ! 742: u_int16_t ul_checksum; ! 743: u_int16_t ul_unused0; ! 744: u_int32_t ul_version; ! 745: u_int32_t ul_time; ! 746: u_int16_t ul_namelen; ! 747: u_char ul_name[APPLEUFS_MAX_LABEL_NAME]; /* Warning: may not be null terminated */ ! 748: u_int16_t ul_unused1; ! 749: u_int64_t ul_uuid; /* Note this is only 4 byte aligned */ ! 750: u_char ul_reserved[24]; ! 751: u_char ul_unused[460]; ! 752: } __packed; ! 753: ! 754: ! 755: #endif /* !_UFS_FFS_FS_H_ */
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