| /*- |
| * 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. |
| * 3. 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 |
| * $FreeBSD$ |
| */ |
| |
| #ifndef _UFS_FFS_FS_H_ |
| #define _UFS_FFS_FS_H_ |
| |
| #include <sys/mount.h> |
| #include <ufs/ufs/dinode.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 SBLOCKSIZE, |
| * and that both SBLOCKSIZE 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_SET_CWD 12 /* set current directory */ |
| #define FFS_SET_DOTDOT 13 /* set inode number for ".." */ |
| #define FFS_UNLINK 14 /* remove a name in the filesystem */ |
| #define FFS_SET_INODE 15 /* update an on-disk inode */ |
| #define FFS_SET_BUFOUTPUT 16 /* set buffered writing on descriptor */ |
| #define FFS_MAXID 16 /* 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 */ |
| u_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 */ |
| u_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 */ |
| u_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 */ |
| u_char fs_fsmnt[MAXMNTLEN]; /* name mounted on */ |
| u_char fs_volname[MAXVOLLEN]; /* volume name */ |
| u_int64_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 */ |
| u_int8_t *fs_contigdirs; /* (u) # of contig. allocated dirs */ |
| struct csum *fs_csp; /* (u) cg summary info buffer */ |
| int32_t *fs_maxcluster; /* (u) max cluster in each cyl group */ |
| u_int *fs_active; /* (u) 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_unrefs; /* number of unreferenced inodes */ |
| int64_t fs_providersize; /* size of underlying GEOM provider */ |
| int64_t fs_metaspace; /* size of area reserved for metadata */ |
| int64_t fs_sparecon64[14]; /* old rotation block list head */ |
| int64_t fs_sblockloc; /* byte offset of standard superblock */ |
| struct csum_total fs_cstotal; /* (u) 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; /* (u) blocks being freed */ |
| u_int32_t fs_pendinginodes; /* (u) inodes being freed */ |
| uint32_t fs_snapinum[FSMAXSNAP];/* list of snapshot inode numbers */ |
| u_int32_t fs_avgfilesize; /* expected average file size */ |
| u_int32_t fs_avgfpdir; /* expected # of files per directory */ |
| int32_t fs_save_cgsize; /* save real cg size to use fs_bsize */ |
| ufs_time_t fs_mtime; /* Last mount or fsck time. */ |
| int32_t fs_sujfree; /* SUJ free list */ |
| int32_t fs_sparecon32[23]; /* 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 */ |
| u_int64_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 POSIX.1e 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_NFS4ACLS indicates that NFSv4 ACLs are administratively |
| * enabled. This flag is mutually exclusive with FS_ACLS. 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 0x0001 /* filesystem not clean at mount */ |
| #define FS_DOSOFTDEP 0x0002 /* filesystem using soft dependencies */ |
| #define FS_NEEDSFSCK 0x0004 /* filesystem needs sync fsck before mount */ |
| #define FS_SUJ 0x0008 /* Filesystem using softupdate journal */ |
| #define FS_ACLS 0x0010 /* file system has POSIX.1e ACLs enabled */ |
| #define FS_MULTILABEL 0x0020 /* file system is MAC multi-label */ |
| #define FS_GJOURNAL 0x0040 /* gjournaled file system */ |
| #define FS_FLAGS_UPDATED 0x0080 /* flags have been moved to new location */ |
| #define FS_NFS4ACLS 0x0100 /* file system has NFSv4 ACLs enabled */ |
| #define FS_INDEXDIRS 0x0200 /* kernel supports indexed directories */ |
| #define FS_TRIM 0x0400 /* issue BIO_DELETE for deleted blocks */ |
| |
| /* |
| * 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)))) |
| #define ACTIVESET(fs, cg) do { \ |
| if ((fs)->fs_active) \ |
| ACTIVECGNUM((fs), (cg)) |= ACTIVECGOFF((cg)); \ |
| } while (0) |
| #define ACTIVECLEAR(fs, cg) do { \ |
| if ((fs)->fs_active) \ |
| ACTIVECGNUM((fs), (cg)) &= ~ACTIVECGOFF((cg)); \ |
| } while (0) |
| |
| /* |
| * 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(u_int16_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 */ |
| u_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 */ |
| u_int32_t cg_ndblk; /* number of data blocks this cg */ |
| struct csum cg_cs; /* cylinder summary information */ |
| u_int32_t cg_rotor; /* position of last used block */ |
| u_int32_t cg_frotor; /* position of last used frag */ |
| u_int32_t cg_irotor; /* position of last used inode */ |
| u_int32_t cg_frsum[MAXFRAG]; /* counts of available frags */ |
| int32_t cg_old_btotoff; /* (int32) block totals per cylinder */ |
| int32_t cg_old_boff; /* (u_int16) free block positions */ |
| u_int32_t cg_iusedoff; /* (u_int8) used inode map */ |
| u_int32_t cg_freeoff; /* (u_int8) free block map */ |
| u_int32_t cg_nextfreeoff; /* (u_int8) next available space */ |
| u_int32_t cg_clustersumoff; /* (u_int32) counts of avail clusters */ |
| u_int32_t cg_clusteroff; /* (u_int8) free cluster map */ |
| u_int32_t cg_nclusterblks; /* number of clusters this cg */ |
| u_int32_t cg_niblk; /* number of inode blocks this cg */ |
| u_int32_t cg_initediblk; /* last initialized inode */ |
| u_int32_t cg_unrefs; /* number of unreferenced inodes */ |
| int32_t cg_sparecon32[2]; /* reserved for future use */ |
| ufs_time_t cg_time; /* time last written */ |
| int64_t cg_sparecon64[3]; /* reserved for future use */ |
| u_int8_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) \ |
| ((u_int8_t *)((u_int8_t *)(cgp) + (cgp)->cg_iusedoff)) |
| #define cg_blksfree(cgp) \ |
| ((u_int8_t *)((u_int8_t *)(cgp) + (cgp)->cg_freeoff)) |
| #define cg_clustersfree(cgp) \ |
| ((u_int8_t *)((u_int8_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) ((daddr_t)(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 cgdata(fs, c) (cgdmin(fs, c) + (fs)->fs_metaspace) /* data zone */ |
| #define cgmeta(fs, c) (cgdmin(fs, c)) /* meta data */ |
| #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) (((ino_t)(x)) / (fs)->fs_ipg) |
| #define ino_to_fsba(fs, x) \ |
| ((ufs2_daddr_t)(cgimin(fs, ino_to_cg(fs, (ino_t)(x))) + \ |
| (blkstofrags((fs), ((((ino_t)(x)) % (fs)->fs_ipg) / INOPB(fs)))))) |
| #define ino_to_fsbo(fs, x) (((ino_t)(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_bmask)) |
| #define fragoff(fs, loc) /* calculates (loc % fs->fs_fsize) */ \ |
| ((loc) & ~((fs)->fs_fmask)) |
| #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_bsize - 1) & (fs)->fs_bmask) |
| #define fragroundup(fs, size) /* calculates roundup(size, fs->fs_fsize) */ \ |
| (((size) + (fs)->fs_fsize - 1) & (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 indirects in a filesystem block. |
| */ |
| #define NINDIR(fs) ((fs)->fs_nindir) |
| |
| /* |
| * Indirect lbns are aligned on NDADDR addresses where single indirects |
| * are the negated address of the lowest lbn reachable, double indirects |
| * are this lbn - 1 and triple indirects are this lbn - 2. This yields |
| * an unusual bit order to determine level. |
| */ |
| static inline int |
| lbn_level(ufs_lbn_t lbn) |
| { |
| if (lbn >= 0) |
| return 0; |
| switch (lbn & 0x3) { |
| case 0: |
| return (0); |
| case 1: |
| break; |
| case 2: |
| return (2); |
| case 3: |
| return (1); |
| default: |
| break; |
| } |
| return (-1); |
| } |
| |
| static inline ufs_lbn_t |
| lbn_offset(struct fs *fs, int level) |
| { |
| ufs_lbn_t res; |
| |
| for (res = 1; level > 0; level--) |
| res *= NINDIR(fs); |
| return (res); |
| } |
| |
| /* |
| * Number of inodes in a secondary storage block/fragment. |
| */ |
| #define INOPB(fs) ((fs)->fs_inopb) |
| #define INOPF(fs) ((fs)->fs_inopb >> (fs)->fs_fragshift) |
| |
| /* |
| * Softdep journal record format. |
| */ |
| |
| #define JOP_ADDREF 1 /* Add a reference to an inode. */ |
| #define JOP_REMREF 2 /* Remove a reference from an inode. */ |
| #define JOP_NEWBLK 3 /* Allocate a block. */ |
| #define JOP_FREEBLK 4 /* Free a block or a tree of blocks. */ |
| #define JOP_MVREF 5 /* Move a reference from one off to another. */ |
| #define JOP_TRUNC 6 /* Partial truncation record. */ |
| #define JOP_SYNC 7 /* fsync() complete record. */ |
| |
| #define JREC_SIZE 32 /* Record and segment header size. */ |
| |
| #define SUJ_MIN (4 * 1024 * 1024) /* Minimum journal size */ |
| #define SUJ_MAX (32 * 1024 * 1024) /* Maximum journal size */ |
| #define SUJ_FILE ".sujournal" /* Journal file name */ |
| |
| /* |
| * Size of the segment record header. There is at most one for each disk |
| * block in the journal. The segment header is followed by an array of |
| * records. fsck depends on the first element in each record being 'op' |
| * and the second being 'ino'. Segments may span multiple disk blocks but |
| * the header is present on each. |
| */ |
| struct jsegrec { |
| uint64_t jsr_seq; /* Our sequence number */ |
| uint64_t jsr_oldest; /* Oldest valid sequence number */ |
| uint16_t jsr_cnt; /* Count of valid records */ |
| uint16_t jsr_blocks; /* Count of device bsize blocks. */ |
| uint32_t jsr_crc; /* 32bit crc of the valid space */ |
| ufs_time_t jsr_time; /* timestamp for mount instance */ |
| }; |
| |
| /* |
| * Reference record. Records a single link count modification. |
| */ |
| struct jrefrec { |
| uint32_t jr_op; |
| uint32_t jr_ino; |
| uint32_t jr_parent; |
| uint16_t jr_nlink; |
| uint16_t jr_mode; |
| int64_t jr_diroff; |
| uint64_t jr_unused; |
| }; |
| |
| /* |
| * Move record. Records a reference moving within a directory block. The |
| * nlink is unchanged but we must search both locations. |
| */ |
| struct jmvrec { |
| uint32_t jm_op; |
| uint32_t jm_ino; |
| uint32_t jm_parent; |
| uint16_t jm_unused; |
| int64_t jm_oldoff; |
| int64_t jm_newoff; |
| }; |
| |
| /* |
| * Block record. A set of frags or tree of blocks starting at an indirect are |
| * freed or a set of frags are allocated. |
| */ |
| struct jblkrec { |
| uint32_t jb_op; |
| uint32_t jb_ino; |
| ufs2_daddr_t jb_blkno; |
| ufs_lbn_t jb_lbn; |
| uint16_t jb_frags; |
| uint16_t jb_oldfrags; |
| uint32_t jb_unused; |
| }; |
| |
| /* |
| * Truncation record. Records a partial truncation so that it may be |
| * completed at check time. Also used for sync records. |
| */ |
| struct jtrncrec { |
| uint32_t jt_op; |
| uint32_t jt_ino; |
| int64_t jt_size; |
| uint32_t jt_extsize; |
| uint32_t jt_pad[3]; |
| }; |
| |
| union jrec { |
| struct jsegrec rec_jsegrec; |
| struct jrefrec rec_jrefrec; |
| struct jmvrec rec_jmvrec; |
| struct jblkrec rec_jblkrec; |
| struct jtrncrec rec_jtrncrec; |
| }; |
| |
| #ifdef CTASSERT |
| CTASSERT(sizeof(struct jsegrec) == JREC_SIZE); |
| CTASSERT(sizeof(struct jrefrec) == JREC_SIZE); |
| CTASSERT(sizeof(struct jmvrec) == JREC_SIZE); |
| CTASSERT(sizeof(struct jblkrec) == JREC_SIZE); |
| CTASSERT(sizeof(struct jtrncrec) == JREC_SIZE); |
| CTASSERT(sizeof(union jrec) == JREC_SIZE); |
| #endif |
| |
| extern int inside[], around[]; |
| extern u_char *fragtbl[]; |
| |
| /* |
| * IOCTLs used for filesystem write suspension. |
| */ |
| #define UFSSUSPEND _IOW('U', 1, fsid_t) |
| #define UFSRESUME _IO('U', 2) |
| |
| #endif |