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Diffstat (limited to 'qemu/roms/openbios/fs/grubfs/ufs_fs.h')
| -rw-r--r-- | qemu/roms/openbios/fs/grubfs/ufs_fs.h | 635 |
1 files changed, 0 insertions, 635 deletions
diff --git a/qemu/roms/openbios/fs/grubfs/ufs_fs.h b/qemu/roms/openbios/fs/grubfs/ufs_fs.h deleted file mode 100644 index bd11cc968..000000000 --- a/qemu/roms/openbios/fs/grubfs/ufs_fs.h +++ /dev/null @@ -1,635 +0,0 @@ -/*- - * Copyright (c) 1982, 1986, 1993 - * The Regents of the University of California. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * @(#)fs.h 8.13 (Berkeley) 3/21/95 - * $FreeBSD: src/sys/ufs/ffs/fs.h,v 1.43.2.3 2005/02/28 16:04:53 delphij Exp $ - */ - -#ifndef _UFS_FFS_FS_H_ -#define _UFS_FFS_FS_H_ - -/* - * Each disk drive contains some number of filesystems. - * A filesystem consists of a number of cylinder groups. - * Each cylinder group has inodes and data. - * - * A filesystem is described by its super-block, which in turn - * describes the cylinder groups. The super-block is critical - * data and is replicated in each cylinder group to protect against - * catastrophic loss. This is done at `newfs' time and the critical - * super-block data does not change, so the copies need not be - * referenced further unless disaster strikes. - * - * For filesystem fs, the offsets of the various blocks of interest - * are given in the super block as: - * [fs->fs_sblkno] Super-block - * [fs->fs_cblkno] Cylinder group block - * [fs->fs_iblkno] Inode blocks - * [fs->fs_dblkno] Data blocks - * The beginning of cylinder group cg in fs, is given by - * the ``cgbase(fs, cg)'' macro. - * - * Depending on the architecture and the media, the superblock may - * reside in any one of four places. For tiny media where every block - * counts, it is placed at the very front of the partition. Historically, - * UFS1 placed it 8K from the front to leave room for the disk label and - * a small bootstrap. For UFS2 it got moved to 64K from the front to leave - * room for the disk label and a bigger bootstrap, and for really piggy - * systems we check at 256K from the front if the first three fail. In - * all cases the size of the superblock will be SBLOCKSIZE. All values are - * given in byte-offset form, so they do not imply a sector size. The - * SBLOCKSEARCH specifies the order in which the locations should be searched. - */ -#define SBLOCK_FLOPPY 0 -#define SBLOCK_UFS1 8192 -#define SBLOCK_UFS2 65536 -#define SBLOCK_PIGGY 262144 -#define SBLOCKSIZE 8192 -#define SBLOCKSEARCH \ - { SBLOCK_UFS2, SBLOCK_UFS1, SBLOCK_FLOPPY, SBLOCK_PIGGY, -1 } - -/* - * Max number of fragments per block. This value is NOT tweakable. - */ -#define MAXFRAG 8 - -/* - * Addresses stored in inodes are capable of addressing fragments - * of `blocks'. File system blocks of at most size MAXBSIZE can - * be optionally broken into 2, 4, or 8 pieces, each of which is - * addressable; these pieces may be DEV_BSIZE, or some multiple of - * a DEV_BSIZE unit. - * - * Large files consist of exclusively large data blocks. To avoid - * undue wasted disk space, the last data block of a small file may be - * allocated as only as many fragments of a large block as are - * necessary. The filesystem format retains only a single pointer - * to such a fragment, which is a piece of a single large block that - * has been divided. The size of such a fragment is determinable from - * information in the inode, using the ``blksize(fs, ip, lbn)'' macro. - * - * The filesystem records space availability at the fragment level; - * to determine block availability, aligned fragments are examined. - */ - -/* - * MINBSIZE is the smallest allowable block size. - * In order to insure that it is possible to create files of size - * 2^32 with only two levels of indirection, MINBSIZE is set to 4096. - * MINBSIZE must be big enough to hold a cylinder group block, - * thus changes to (struct cg) must keep its size within MINBSIZE. - * Note that super blocks are always of size SBSIZE, - * and that both SBSIZE and MAXBSIZE must be >= MINBSIZE. - */ -#define MINBSIZE 4096 - -/* - * The path name on which the filesystem is mounted is maintained - * in fs_fsmnt. MAXMNTLEN defines the amount of space allocated in - * the super block for this name. - */ -#define MAXMNTLEN 468 - -/* - * The volume name for this filesystem is maintained in fs_volname. - * MAXVOLLEN defines the length of the buffer allocated. - */ -#define MAXVOLLEN 32 - -/* - * There is a 128-byte region in the superblock reserved for in-core - * pointers to summary information. Originally this included an array - * of pointers to blocks of struct csum; now there are just a few - * pointers and the remaining space is padded with fs_ocsp[]. - * - * NOCSPTRS determines the size of this padding. One pointer (fs_csp) - * is taken away to point to a contiguous array of struct csum for - * all cylinder groups; a second (fs_maxcluster) points to an array - * of cluster sizes that is computed as cylinder groups are inspected, - * and the third points to an array that tracks the creation of new - * directories. A fourth pointer, fs_active, is used when creating - * snapshots; it points to a bitmap of cylinder groups for which the - * free-block bitmap has changed since the snapshot operation began. - */ -#define NOCSPTRS ((128 / sizeof(void *)) - 4) - -/* - * A summary of contiguous blocks of various sizes is maintained - * in each cylinder group. Normally this is set by the initial - * value of fs_maxcontig. To conserve space, a maximum summary size - * is set by FS_MAXCONTIG. - */ -#define FS_MAXCONTIG 16 - -/* - * MINFREE gives the minimum acceptable percentage of filesystem - * blocks which may be free. If the freelist drops below this level - * only the superuser may continue to allocate blocks. This may - * be set to 0 if no reserve of free blocks is deemed necessary, - * however throughput drops by fifty percent if the filesystem - * is run at between 95% and 100% full; thus the minimum default - * value of fs_minfree is 5%. However, to get good clustering - * performance, 10% is a better choice. hence we use 10% as our - * default value. With 10% free space, fragmentation is not a - * problem, so we choose to optimize for time. - */ -#define MINFREE 8 -#define DEFAULTOPT FS_OPTTIME - -/* - * Grigoriy Orlov <gluk@ptci.ru> has done some extensive work to fine - * tune the layout preferences for directories within a filesystem. - * His algorithm can be tuned by adjusting the following parameters - * which tell the system the average file size and the average number - * of files per directory. These defaults are well selected for typical - * filesystems, but may need to be tuned for odd cases like filesystems - * being used for squid caches or news spools. - */ -#define AVFILESIZ 16384 /* expected average file size */ -#define AFPDIR 64 /* expected number of files per directory */ - -/* - * The maximum number of snapshot nodes that can be associated - * with each filesystem. This limit affects only the number of - * snapshot files that can be recorded within the superblock so - * that they can be found when the filesystem is mounted. However, - * maintaining too many will slow the filesystem performance, so - * having this limit is a good idea. - */ -#define FSMAXSNAP 20 - -/* - * Used to identify special blocks in snapshots: - * - * BLK_NOCOPY - A block that was unallocated at the time the snapshot - * was taken, hence does not need to be copied when written. - * BLK_SNAP - A block held by another snapshot that is not needed by this - * snapshot. When the other snapshot is freed, the BLK_SNAP entries - * are converted to BLK_NOCOPY. These are needed to allow fsck to - * identify blocks that are in use by other snapshots (which are - * expunged from this snapshot). - */ -#define BLK_NOCOPY ((ufs2_daddr_t)(1)) -#define BLK_SNAP ((ufs2_daddr_t)(2)) - -/* - * Sysctl values for the fast filesystem. - */ -#define FFS_ADJ_REFCNT 1 /* adjust inode reference count */ -#define FFS_ADJ_BLKCNT 2 /* adjust inode used block count */ -#define FFS_BLK_FREE 3 /* free range of blocks in map */ -#define FFS_DIR_FREE 4 /* free specified dir inodes in map */ -#define FFS_FILE_FREE 5 /* free specified file inodes in map */ -#define FFS_SET_FLAGS 6 /* set filesystem flags */ -#define FFS_ADJ_NDIR 7 /* adjust number of directories */ -#define FFS_ADJ_NBFREE 8 /* adjust number of free blocks */ -#define FFS_ADJ_NIFREE 9 /* adjust number of free inodes */ -#define FFS_ADJ_NFFREE 10 /* adjust number of free frags */ -#define FFS_ADJ_NUMCLUSTERS 11 /* adjust number of free clusters */ -#define FFS_MAXID 12 /* number of valid ffs ids */ - -/* - * Command structure passed in to the filesystem to adjust filesystem values. - */ -#define FFS_CMD_VERSION 0x19790518 /* version ID */ -struct fsck_cmd { - int32_t version; /* version of command structure */ - int32_t handle; /* reference to filesystem to be changed */ - int64_t value; /* inode or block number to be affected */ - int64_t size; /* amount or range to be adjusted */ - int64_t spare; /* reserved for future use */ -}; - -/* - * Per cylinder group information; summarized in blocks allocated - * from first cylinder group data blocks. These blocks have to be - * read in from fs_csaddr (size fs_cssize) in addition to the - * super block. - */ -struct csum { - int32_t cs_ndir; /* number of directories */ - int32_t cs_nbfree; /* number of free blocks */ - int32_t cs_nifree; /* number of free inodes */ - int32_t cs_nffree; /* number of free frags */ -}; -struct csum_total { - int64_t cs_ndir; /* number of directories */ - int64_t cs_nbfree; /* number of free blocks */ - int64_t cs_nifree; /* number of free inodes */ - int64_t cs_nffree; /* number of free frags */ - int64_t cs_numclusters; /* number of free clusters */ - int64_t cs_spare[3]; /* future expansion */ -}; - -/* - * Super block for an FFS filesystem. - */ -struct fs { - int32_t fs_firstfield; /* historic filesystem linked list, */ - int32_t fs_unused_1; /* used for incore super blocks */ - int32_t fs_sblkno; /* offset of super-block in filesys */ - int32_t fs_cblkno; /* offset of cyl-block in filesys */ - int32_t fs_iblkno; /* offset of inode-blocks in filesys */ - int32_t fs_dblkno; /* offset of first data after cg */ - int32_t fs_old_cgoffset; /* cylinder group offset in cylinder */ - int32_t fs_old_cgmask; /* used to calc mod fs_ntrak */ - int32_t fs_old_time; /* last time written */ - int32_t fs_old_size; /* number of blocks in fs */ - int32_t fs_old_dsize; /* number of data blocks in fs */ - int32_t fs_ncg; /* number of cylinder groups */ - int32_t fs_bsize; /* size of basic blocks in fs */ - int32_t fs_fsize; /* size of frag blocks in fs */ - int32_t fs_frag; /* number of frags in a block in fs */ -/* these are configuration parameters */ - int32_t fs_minfree; /* minimum percentage of free blocks */ - int32_t fs_old_rotdelay; /* num of ms for optimal next block */ - int32_t fs_old_rps; /* disk revolutions per second */ -/* these fields can be computed from the others */ - int32_t fs_bmask; /* ``blkoff'' calc of blk offsets */ - int32_t fs_fmask; /* ``fragoff'' calc of frag offsets */ - int32_t fs_bshift; /* ``lblkno'' calc of logical blkno */ - int32_t fs_fshift; /* ``numfrags'' calc number of frags */ -/* these are configuration parameters */ - int32_t fs_maxcontig; /* max number of contiguous blks */ - int32_t fs_maxbpg; /* max number of blks per cyl group */ -/* these fields can be computed from the others */ - int32_t fs_fragshift; /* block to frag shift */ - int32_t fs_fsbtodb; /* fsbtodb and dbtofsb shift constant */ - int32_t fs_sbsize; /* actual size of super block */ - int32_t fs_spare1[2]; /* old fs_csmask */ - /* old fs_csshift */ - int32_t fs_nindir; /* value of NINDIR */ - int32_t fs_inopb; /* value of INOPB */ - int32_t fs_old_nspf; /* value of NSPF */ -/* yet another configuration parameter */ - int32_t fs_optim; /* optimization preference, see below */ - int32_t fs_old_npsect; /* # sectors/track including spares */ - int32_t fs_old_interleave; /* hardware sector interleave */ - int32_t fs_old_trackskew; /* sector 0 skew, per track */ - int32_t fs_id[2]; /* unique filesystem id */ -/* sizes determined by number of cylinder groups and their sizes */ - int32_t fs_old_csaddr; /* blk addr of cyl grp summary area */ - int32_t fs_cssize; /* size of cyl grp summary area */ - int32_t fs_cgsize; /* cylinder group size */ - int32_t fs_spare2; /* old fs_ntrak */ - int32_t fs_old_nsect; /* sectors per track */ - int32_t fs_old_spc; /* sectors per cylinder */ - int32_t fs_old_ncyl; /* cylinders in filesystem */ - int32_t fs_old_cpg; /* cylinders per group */ - int32_t fs_ipg; /* inodes per group */ - int32_t fs_fpg; /* blocks per group * fs_frag */ -/* this data must be re-computed after crashes */ - struct csum fs_old_cstotal; /* cylinder summary information */ -/* these fields are cleared at mount time */ - int8_t fs_fmod; /* super block modified flag */ - int8_t fs_clean; /* filesystem is clean flag */ - int8_t fs_ronly; /* mounted read-only flag */ - int8_t fs_old_flags; /* old FS_ flags */ - char fs_fsmnt[MAXMNTLEN]; /* name mounted on */ - char fs_volname[MAXVOLLEN]; /* volume name */ - uint64_t fs_swuid; /* system-wide uid */ - int32_t fs_pad; /* due to alignment of fs_swuid */ -/* these fields retain the current block allocation info */ - int32_t fs_cgrotor; /* last cg searched */ - void *fs_ocsp[NOCSPTRS]; /* padding; was list of fs_cs buffers */ - uint8_t *fs_contigdirs; /* # of contiguously allocated dirs */ - struct csum *fs_csp; /* cg summary info buffer for fs_cs */ - int32_t *fs_maxcluster; /* max cluster in each cyl group */ - unsigned int *fs_active; /* used by snapshots to track fs */ - int32_t fs_old_cpc; /* cyl per cycle in postbl */ - int32_t fs_maxbsize; /* maximum blocking factor permitted */ - int64_t fs_sparecon64[17]; /* old rotation block list head */ - int64_t fs_sblockloc; /* byte offset of standard superblock */ - struct csum_total fs_cstotal; /* cylinder summary information */ - ufs_time_t fs_time; /* last time written */ - int64_t fs_size; /* number of blocks in fs */ - int64_t fs_dsize; /* number of data blocks in fs */ - ufs2_daddr_t fs_csaddr; /* blk addr of cyl grp summary area */ - int64_t fs_pendingblocks; /* blocks in process of being freed */ - int32_t fs_pendinginodes; /* inodes in process of being freed */ - int32_t fs_snapinum[FSMAXSNAP];/* list of snapshot inode numbers */ - int32_t fs_avgfilesize; /* expected average file size */ - int32_t fs_avgfpdir; /* expected # of files per directory */ - int32_t fs_save_cgsize; /* save real cg size to use fs_bsize */ - int32_t fs_sparecon32[26]; /* reserved for future constants */ - int32_t fs_flags; /* see FS_ flags below */ - int32_t fs_contigsumsize; /* size of cluster summary array */ - int32_t fs_maxsymlinklen; /* max length of an internal symlink */ - int32_t fs_old_inodefmt; /* format of on-disk inodes */ - uint64_t fs_maxfilesize; /* maximum representable file size */ - int64_t fs_qbmask; /* ~fs_bmask for use with 64-bit size */ - int64_t fs_qfmask; /* ~fs_fmask for use with 64-bit size */ - int32_t fs_state; /* validate fs_clean field */ - int32_t fs_old_postblformat; /* format of positional layout tables */ - int32_t fs_old_nrpos; /* number of rotational positions */ - int32_t fs_spare5[2]; /* old fs_postbloff */ - /* old fs_rotbloff */ - int32_t fs_magic; /* magic number */ -}; - -/* Sanity checking. */ -#ifdef CTASSERT -CTASSERT(sizeof(struct fs) == 1376); -#endif - -/* - * Filesystem identification - */ -#define FS_UFS1_MAGIC 0x011954 /* UFS1 fast filesystem magic number */ -#define FS_UFS2_MAGIC 0x19540119 /* UFS2 fast filesystem magic number */ -#define FS_BAD_MAGIC 0x19960408 /* UFS incomplete newfs magic number */ -#define FS_OKAY 0x7c269d38 /* superblock checksum */ -#define FS_42INODEFMT -1 /* 4.2BSD inode format */ -#define FS_44INODEFMT 2 /* 4.4BSD inode format */ - -/* - * Preference for optimization. - */ -#define FS_OPTTIME 0 /* minimize allocation time */ -#define FS_OPTSPACE 1 /* minimize disk fragmentation */ - -/* - * Filesystem flags. - * - * The FS_UNCLEAN flag is set by the kernel when the filesystem was - * mounted with fs_clean set to zero. The FS_DOSOFTDEP flag indicates - * that the filesystem should be managed by the soft updates code. - * Note that the FS_NEEDSFSCK flag is set and cleared only by the - * fsck utility. It is set when background fsck finds an unexpected - * inconsistency which requires a traditional foreground fsck to be - * run. Such inconsistencies should only be found after an uncorrectable - * disk error. A foreground fsck will clear the FS_NEEDSFSCK flag when - * it has successfully cleaned up the filesystem. The kernel uses this - * flag to enforce that inconsistent filesystems be mounted read-only. - * The FS_INDEXDIRS flag when set indicates that the kernel maintains - * on-disk auxiliary indexes (such as B-trees) for speeding directory - * accesses. Kernels that do not support auxiliary indicies clear the - * flag to indicate that the indicies need to be rebuilt (by fsck) before - * they can be used. - * - * FS_ACLS indicates that ACLs are administratively enabled for the - * file system, so they should be loaded from extended attributes, - * observed for access control purposes, and be administered by object - * owners. FS_MULTILABEL indicates that the TrustedBSD MAC Framework - * should attempt to back MAC labels into extended attributes on the - * file system rather than maintain a single mount label for all - * objects. - */ -#define FS_UNCLEAN 0x01 /* filesystem not clean at mount */ -#define FS_DOSOFTDEP 0x02 /* filesystem using soft dependencies */ -#define FS_NEEDSFSCK 0x04 /* filesystem needs sync fsck before mount */ -#define FS_INDEXDIRS 0x08 /* kernel supports indexed directories */ -#define FS_ACLS 0x10 /* file system has ACLs enabled */ -#define FS_MULTILABEL 0x20 /* file system is MAC multi-label */ -#define FS_FLAGS_UPDATED 0x80 /* flags have been moved to new location */ - -/* - * Macros to access bits in the fs_active array. - */ -#define ACTIVECGNUM(fs, cg) ((fs)->fs_active[(cg) / (NBBY * sizeof(int))]) -#define ACTIVECGOFF(cg) (1 << ((cg) % (NBBY * sizeof(int)))) - -/* - * The size of a cylinder group is calculated by CGSIZE. The maximum size - * is limited by the fact that cylinder groups are at most one block. - * Its size is derived from the size of the maps maintained in the - * cylinder group and the (struct cg) size. - */ -#define CGSIZE(fs) \ - /* base cg */ (sizeof(struct cg) + sizeof(int32_t) + \ - /* old btotoff */ (fs)->fs_old_cpg * sizeof(int32_t) + \ - /* old boff */ (fs)->fs_old_cpg * sizeof(uint16_t) + \ - /* inode map */ howmany((fs)->fs_ipg, NBBY) + \ - /* block map */ howmany((fs)->fs_fpg, NBBY) +\ - /* if present */ ((fs)->fs_contigsumsize <= 0 ? 0 : \ - /* cluster sum */ (fs)->fs_contigsumsize * sizeof(int32_t) + \ - /* cluster map */ howmany(fragstoblks(fs, (fs)->fs_fpg), NBBY))) - -/* - * The minimal number of cylinder groups that should be created. - */ -#define MINCYLGRPS 4 - -/* - * Convert cylinder group to base address of its global summary info. - */ -#define fs_cs(fs, indx) fs_csp[indx] - -/* - * Cylinder group block for a filesystem. - */ -#define CG_MAGIC 0x090255 -struct cg { - int32_t cg_firstfield; /* historic cyl groups linked list */ - int32_t cg_magic; /* magic number */ - int32_t cg_old_time; /* time last written */ - int32_t cg_cgx; /* we are the cgx'th cylinder group */ - int16_t cg_old_ncyl; /* number of cyl's this cg */ - int16_t cg_old_niblk; /* number of inode blocks this cg */ - int32_t cg_ndblk; /* number of data blocks this cg */ - struct csum cg_cs; /* cylinder summary information */ - int32_t cg_rotor; /* position of last used block */ - int32_t cg_frotor; /* position of last used frag */ - int32_t cg_irotor; /* position of last used inode */ - int32_t cg_frsum[MAXFRAG]; /* counts of available frags */ - int32_t cg_old_btotoff; /* (int32) block totals per cylinder */ - int32_t cg_old_boff; /* (uint16) free block positions */ - int32_t cg_iusedoff; /* (uint8) used inode map */ - int32_t cg_freeoff; /* (uint8) free block map */ - int32_t cg_nextfreeoff; /* (uint8) next available space */ - int32_t cg_clustersumoff; /* (uint32) counts of avail clusters */ - int32_t cg_clusteroff; /* (uint8) free cluster map */ - int32_t cg_nclusterblks; /* number of clusters this cg */ - int32_t cg_niblk; /* number of inode blocks this cg */ - int32_t cg_initediblk; /* last initialized inode */ - int32_t cg_sparecon32[3]; /* reserved for future use */ - ufs_time_t cg_time; /* time last written */ - int64_t cg_sparecon64[3]; /* reserved for future use */ - uint8_t cg_space[1]; /* space for cylinder group maps */ -/* actually longer */ -}; - -/* - * Macros for access to cylinder group array structures - */ -#define cg_chkmagic(cgp) ((cgp)->cg_magic == CG_MAGIC) -#define cg_inosused(cgp) \ - ((uint8_t *)((uint8_t *)(cgp) + (cgp)->cg_iusedoff)) -#define cg_blksfree(cgp) \ - ((uint8_t *)((uint8_t *)(cgp) + (cgp)->cg_freeoff)) -#define cg_clustersfree(cgp) \ - ((uint8_t *)((uint8_t *)(cgp) + (cgp)->cg_clusteroff)) -#define cg_clustersum(cgp) \ - ((int32_t *)((uintptr_t)(cgp) + (cgp)->cg_clustersumoff)) - -/* - * Turn filesystem block numbers into disk block addresses. - * This maps filesystem blocks to device size blocks. - */ -#define fsbtodb(fs, b) ((b) << (fs)->fs_fsbtodb) -#define dbtofsb(fs, b) ((b) >> (fs)->fs_fsbtodb) - -/* - * Cylinder group macros to locate things in cylinder groups. - * They calc filesystem addresses of cylinder group data structures. - */ -#define cgbase(fs, c) (((ufs2_daddr_t)(fs)->fs_fpg) * (c)) -#define cgdmin(fs, c) (cgstart(fs, c) + (fs)->fs_dblkno) /* 1st data */ -#define cgimin(fs, c) (cgstart(fs, c) + (fs)->fs_iblkno) /* inode blk */ -#define cgsblock(fs, c) (cgstart(fs, c) + (fs)->fs_sblkno) /* super blk */ -#define cgtod(fs, c) (cgstart(fs, c) + (fs)->fs_cblkno) /* cg block */ -#define cgstart(fs, c) \ - ((fs)->fs_magic == FS_UFS2_MAGIC ? cgbase(fs, c) : \ - (cgbase(fs, c) + (fs)->fs_old_cgoffset * ((c) & ~((fs)->fs_old_cgmask)))) - -/* - * Macros for handling inode numbers: - * inode number to filesystem block offset. - * inode number to cylinder group number. - * inode number to filesystem block address. - */ -#define ino_to_cg(fs, x) ((x) / (fs)->fs_ipg) -#define ino_to_fsba(fs, x) \ - ((ufs2_daddr_t)(cgimin(fs, ino_to_cg(fs, x)) + \ - (blkstofrags((fs), (((x) % (fs)->fs_ipg) / INOPB(fs)))))) -#define ino_to_fsbo(fs, x) ((x) % INOPB(fs)) - -/* - * Give cylinder group number for a filesystem block. - * Give cylinder group block number for a filesystem block. - */ -#define dtog(fs, d) ((d) / (fs)->fs_fpg) -#define dtogd(fs, d) ((d) % (fs)->fs_fpg) - -/* - * Extract the bits for a block from a map. - * Compute the cylinder and rotational position of a cyl block addr. - */ -#define blkmap(fs, map, loc) \ - (((map)[(loc) / NBBY] >> ((loc) % NBBY)) & (0xff >> (NBBY - (fs)->fs_frag))) - -/* - * The following macros optimize certain frequently calculated - * quantities by using shifts and masks in place of divisions - * modulos and multiplications. - */ -#define blkoff(fs, loc) /* calculates (loc % fs->fs_bsize) */ \ - ((loc) & (fs)->fs_qbmask) -#define fragoff(fs, loc) /* calculates (loc % fs->fs_fsize) */ \ - ((loc) & (fs)->fs_qfmask) -#define lfragtosize(fs, frag) /* calculates ((off_t)frag * fs->fs_fsize) */ \ - (((off_t)(frag)) << (fs)->fs_fshift) -#define lblktosize(fs, blk) /* calculates ((off_t)blk * fs->fs_bsize) */ \ - (((off_t)(blk)) << (fs)->fs_bshift) -/* Use this only when `blk' is known to be small, e.g., < NDADDR. */ -#define smalllblktosize(fs, blk) /* calculates (blk * fs->fs_bsize) */ \ - ((blk) << (fs)->fs_bshift) -#define lblkno(fs, loc) /* calculates (loc / fs->fs_bsize) */ \ - ((loc) >> (fs)->fs_bshift) -#define numfrags(fs, loc) /* calculates (loc / fs->fs_fsize) */ \ - ((loc) >> (fs)->fs_fshift) -#define blkroundup(fs, size) /* calculates roundup(size, fs->fs_bsize) */ \ - (((size) + (fs)->fs_qbmask) & (fs)->fs_bmask) -#define fragroundup(fs, size) /* calculates roundup(size, fs->fs_fsize) */ \ - (((size) + (fs)->fs_qfmask) & (fs)->fs_fmask) -#define fragstoblks(fs, frags) /* calculates (frags / fs->fs_frag) */ \ - ((frags) >> (fs)->fs_fragshift) -#define blkstofrags(fs, blks) /* calculates (blks * fs->fs_frag) */ \ - ((blks) << (fs)->fs_fragshift) -#define fragnum(fs, fsb) /* calculates (fsb % fs->fs_frag) */ \ - ((fsb) & ((fs)->fs_frag - 1)) -#define blknum(fs, fsb) /* calculates rounddown(fsb, fs->fs_frag) */ \ - ((fsb) &~ ((fs)->fs_frag - 1)) - -/* - * Determine the number of available frags given a - * percentage to hold in reserve. - */ -#define freespace(fs, percentreserved) \ - (blkstofrags((fs), (fs)->fs_cstotal.cs_nbfree) + \ - (fs)->fs_cstotal.cs_nffree - \ - (((off_t)((fs)->fs_dsize)) * (percentreserved) / 100)) - -/* - * Determining the size of a file block in the filesystem. - */ -#define blksize(fs, ip, lbn) \ - (((lbn) >= NDADDR || (ip)->i_size >= smalllblktosize(fs, (lbn) + 1)) \ - ? (fs)->fs_bsize \ - : (fragroundup(fs, blkoff(fs, (ip)->i_size)))) -#define sblksize(fs, size, lbn) \ - (((lbn) >= NDADDR || (size) >= ((lbn) + 1) << (fs)->fs_bshift) \ - ? (fs)->fs_bsize \ - : (fragroundup(fs, blkoff(fs, (size))))) - - -/* - * Number of inodes in a secondary storage block/fragment. - */ -#define INOPB(fs) ((fs)->fs_inopb) -#define INOPF(fs) ((fs)->fs_inopb >> (fs)->fs_fragshift) - -/* - * Number of indirects in a filesystem block. - */ -#define NINDIR(fs) ((fs)->fs_nindir) - -extern int inside[], around[]; -extern char *fragtbl[]; - -struct ufs_dirent { - uint32_t d_fileno; /* file number of entry */ - uint16_t d_reclen; /* length of this record */ - uint8_t d_type; /* file type, see below */ - uint8_t d_namlen; /* length of string in d_name */ -#define MAXNAMLEN 255 - char d_name[MAXNAMLEN + 1]; /* name must be no longer than this */ -}; - -/* - * File types - */ -#define DT_UNKNOWN 0 -#define DT_FIFO 1 -#define DT_CHR 2 -#define DT_DIR 4 -#define DT_BLK 6 -#define DT_REG 8 -#define DT_LNK 10 -#define DT_SOCK 12 -#define DT_WHT 14 - -/* XXX: We hardcode BSIZE and BSIZE_SHIFT here. fsys_ffs seems to do the same, - * so we should get away with it :-) */ -#define DEV_BSIZE 512 -#define DEV_BSHIFT 9 /* 2**9 = 512 */ -#define MAXBSIZE 8192 - -typedef unsigned int ino_t; - -#endif |