199767f8919635c4928607450d9e0abb932109ceToomas Soome * Copyright (c) 1982, 1986, 1993
199767f8919635c4928607450d9e0abb932109ceToomas Soome * The Regents of the University of California. All rights reserved.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Redistribution and use in source and binary forms, with or without
199767f8919635c4928607450d9e0abb932109ceToomas Soome * modification, are permitted provided that the following conditions
199767f8919635c4928607450d9e0abb932109ceToomas Soome * 1. Redistributions of source code must retain the above copyright
199767f8919635c4928607450d9e0abb932109ceToomas Soome * notice, this list of conditions and the following disclaimer.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * 2. Redistributions in binary form must reproduce the above copyright
199767f8919635c4928607450d9e0abb932109ceToomas Soome * notice, this list of conditions and the following disclaimer in the
199767f8919635c4928607450d9e0abb932109ceToomas Soome * documentation and/or other materials provided with the distribution.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * 3. Neither the name of the University nor the names of its contributors
199767f8919635c4928607450d9e0abb932109ceToomas Soome * may be used to endorse or promote products derived from this software
199767f8919635c4928607450d9e0abb932109ceToomas Soome * without specific prior written permission.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
199767f8919635c4928607450d9e0abb932109ceToomas Soome * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
199767f8919635c4928607450d9e0abb932109ceToomas Soome * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
199767f8919635c4928607450d9e0abb932109ceToomas Soome * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
199767f8919635c4928607450d9e0abb932109ceToomas Soome * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
199767f8919635c4928607450d9e0abb932109ceToomas Soome * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
199767f8919635c4928607450d9e0abb932109ceToomas Soome * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
199767f8919635c4928607450d9e0abb932109ceToomas Soome * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
199767f8919635c4928607450d9e0abb932109ceToomas Soome * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
199767f8919635c4928607450d9e0abb932109ceToomas Soome * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
199767f8919635c4928607450d9e0abb932109ceToomas Soome * SUCH DAMAGE.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * @(#)fs.h 8.13 (Berkeley) 3/21/95
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Each disk drive contains some number of filesystems.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * A filesystem consists of a number of cylinder groups.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Each cylinder group has inodes and data.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * A filesystem is described by its super-block, which in turn
199767f8919635c4928607450d9e0abb932109ceToomas Soome * describes the cylinder groups. The super-block is critical
199767f8919635c4928607450d9e0abb932109ceToomas Soome * data and is replicated in each cylinder group to protect against
199767f8919635c4928607450d9e0abb932109ceToomas Soome * catastrophic loss. This is done at `newfs' time and the critical
199767f8919635c4928607450d9e0abb932109ceToomas Soome * super-block data does not change, so the copies need not be
199767f8919635c4928607450d9e0abb932109ceToomas Soome * referenced further unless disaster strikes.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * For filesystem fs, the offsets of the various blocks of interest
199767f8919635c4928607450d9e0abb932109ceToomas Soome * are given in the super block as:
199767f8919635c4928607450d9e0abb932109ceToomas Soome * [fs->fs_sblkno] Super-block
199767f8919635c4928607450d9e0abb932109ceToomas Soome * [fs->fs_cblkno] Cylinder group block
199767f8919635c4928607450d9e0abb932109ceToomas Soome * [fs->fs_iblkno] Inode blocks
199767f8919635c4928607450d9e0abb932109ceToomas Soome * [fs->fs_dblkno] Data blocks
199767f8919635c4928607450d9e0abb932109ceToomas Soome * The beginning of cylinder group cg in fs, is given by
199767f8919635c4928607450d9e0abb932109ceToomas Soome * the ``cgbase(fs, cg)'' macro.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Depending on the architecture and the media, the superblock may
199767f8919635c4928607450d9e0abb932109ceToomas Soome * reside in any one of four places. For tiny media where every block
199767f8919635c4928607450d9e0abb932109ceToomas Soome * counts, it is placed at the very front of the partition. Historically,
199767f8919635c4928607450d9e0abb932109ceToomas Soome * UFS1 placed it 8K from the front to leave room for the disk label and
199767f8919635c4928607450d9e0abb932109ceToomas Soome * a small bootstrap. For UFS2 it got moved to 64K from the front to leave
199767f8919635c4928607450d9e0abb932109ceToomas Soome * room for the disk label and a bigger bootstrap, and for really piggy
199767f8919635c4928607450d9e0abb932109ceToomas Soome * systems we check at 256K from the front if the first three fail. In
199767f8919635c4928607450d9e0abb932109ceToomas Soome * all cases the size of the superblock will be SBLOCKSIZE. All values are
199767f8919635c4928607450d9e0abb932109ceToomas Soome * given in byte-offset form, so they do not imply a sector size. The
199767f8919635c4928607450d9e0abb932109ceToomas Soome * SBLOCKSEARCH specifies the order in which the locations should be searched.
199767f8919635c4928607450d9e0abb932109ceToomas Soome { SBLOCK_UFS2, SBLOCK_UFS1, SBLOCK_FLOPPY, SBLOCK_PIGGY, -1 }
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Max number of fragments per block. This value is NOT tweakable.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Addresses stored in inodes are capable of addressing fragments
199767f8919635c4928607450d9e0abb932109ceToomas Soome * of `blocks'. File system blocks of at most size MAXBSIZE can
199767f8919635c4928607450d9e0abb932109ceToomas Soome * be optionally broken into 2, 4, or 8 pieces, each of which is
199767f8919635c4928607450d9e0abb932109ceToomas Soome * addressable; these pieces may be DEV_BSIZE, or some multiple of
199767f8919635c4928607450d9e0abb932109ceToomas Soome * a DEV_BSIZE unit.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Large files consist of exclusively large data blocks. To avoid
199767f8919635c4928607450d9e0abb932109ceToomas Soome * undue wasted disk space, the last data block of a small file may be
199767f8919635c4928607450d9e0abb932109ceToomas Soome * allocated as only as many fragments of a large block as are
199767f8919635c4928607450d9e0abb932109ceToomas Soome * necessary. The filesystem format retains only a single pointer
199767f8919635c4928607450d9e0abb932109ceToomas Soome * to such a fragment, which is a piece of a single large block that
199767f8919635c4928607450d9e0abb932109ceToomas Soome * has been divided. The size of such a fragment is determinable from
199767f8919635c4928607450d9e0abb932109ceToomas Soome * information in the inode, using the ``blksize(fs, ip, lbn)'' macro.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * The filesystem records space availability at the fragment level;
199767f8919635c4928607450d9e0abb932109ceToomas Soome * to determine block availability, aligned fragments are examined.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * MINBSIZE is the smallest allowable block size.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * In order to insure that it is possible to create files of size
199767f8919635c4928607450d9e0abb932109ceToomas Soome * 2^32 with only two levels of indirection, MINBSIZE is set to 4096.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * MINBSIZE must be big enough to hold a cylinder group block,
199767f8919635c4928607450d9e0abb932109ceToomas Soome * thus changes to (struct cg) must keep its size within MINBSIZE.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Note that super blocks are always of size SBLOCKSIZE,
199767f8919635c4928607450d9e0abb932109ceToomas Soome * and that both SBLOCKSIZE and MAXBSIZE must be >= MINBSIZE.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * The path name on which the filesystem is mounted is maintained
199767f8919635c4928607450d9e0abb932109ceToomas Soome * in fs_fsmnt. MAXMNTLEN defines the amount of space allocated in
199767f8919635c4928607450d9e0abb932109ceToomas Soome * the super block for this name.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * The volume name for this filesystem is maintained in fs_volname.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * MAXVOLLEN defines the length of the buffer allocated.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * There is a 128-byte region in the superblock reserved for in-core
199767f8919635c4928607450d9e0abb932109ceToomas Soome * pointers to summary information. Originally this included an array
199767f8919635c4928607450d9e0abb932109ceToomas Soome * of pointers to blocks of struct csum; now there are just a few
199767f8919635c4928607450d9e0abb932109ceToomas Soome * pointers and the remaining space is padded with fs_ocsp[].
199767f8919635c4928607450d9e0abb932109ceToomas Soome * NOCSPTRS determines the size of this padding. One pointer (fs_csp)
199767f8919635c4928607450d9e0abb932109ceToomas Soome * is taken away to point to a contiguous array of struct csum for
199767f8919635c4928607450d9e0abb932109ceToomas Soome * all cylinder groups; a second (fs_maxcluster) points to an array
199767f8919635c4928607450d9e0abb932109ceToomas Soome * of cluster sizes that is computed as cylinder groups are inspected,
199767f8919635c4928607450d9e0abb932109ceToomas Soome * and the third points to an array that tracks the creation of new
199767f8919635c4928607450d9e0abb932109ceToomas Soome * directories. A fourth pointer, fs_active, is used when creating
199767f8919635c4928607450d9e0abb932109ceToomas Soome * snapshots; it points to a bitmap of cylinder groups for which the
199767f8919635c4928607450d9e0abb932109ceToomas Soome * free-block bitmap has changed since the snapshot operation began.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * A summary of contiguous blocks of various sizes is maintained
199767f8919635c4928607450d9e0abb932109ceToomas Soome * in each cylinder group. Normally this is set by the initial
199767f8919635c4928607450d9e0abb932109ceToomas Soome * value of fs_maxcontig. To conserve space, a maximum summary size
199767f8919635c4928607450d9e0abb932109ceToomas Soome * is set by FS_MAXCONTIG.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * MINFREE gives the minimum acceptable percentage of filesystem
199767f8919635c4928607450d9e0abb932109ceToomas Soome * blocks which may be free. If the freelist drops below this level
199767f8919635c4928607450d9e0abb932109ceToomas Soome * only the superuser may continue to allocate blocks. This may
199767f8919635c4928607450d9e0abb932109ceToomas Soome * be set to 0 if no reserve of free blocks is deemed necessary,
199767f8919635c4928607450d9e0abb932109ceToomas Soome * however throughput drops by fifty percent if the filesystem
199767f8919635c4928607450d9e0abb932109ceToomas Soome * is run at between 95% and 100% full; thus the minimum default
199767f8919635c4928607450d9e0abb932109ceToomas Soome * value of fs_minfree is 5%. However, to get good clustering
199767f8919635c4928607450d9e0abb932109ceToomas Soome * performance, 10% is a better choice. hence we use 10% as our
199767f8919635c4928607450d9e0abb932109ceToomas Soome * default value. With 10% free space, fragmentation is not a
199767f8919635c4928607450d9e0abb932109ceToomas Soome * problem, so we choose to optimize for time.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Grigoriy Orlov <gluk@ptci.ru> has done some extensive work to fine
199767f8919635c4928607450d9e0abb932109ceToomas Soome * tune the layout preferences for directories within a filesystem.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * His algorithm can be tuned by adjusting the following parameters
199767f8919635c4928607450d9e0abb932109ceToomas Soome * which tell the system the average file size and the average number
199767f8919635c4928607450d9e0abb932109ceToomas Soome * of files per directory. These defaults are well selected for typical
199767f8919635c4928607450d9e0abb932109ceToomas Soome * filesystems, but may need to be tuned for odd cases like filesystems
199767f8919635c4928607450d9e0abb932109ceToomas Soome * being used for squid caches or news spools.
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define AVFILESIZ 16384 /* expected average file size */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define AFPDIR 64 /* expected number of files per directory */
199767f8919635c4928607450d9e0abb932109ceToomas Soome * The maximum number of snapshot nodes that can be associated
199767f8919635c4928607450d9e0abb932109ceToomas Soome * with each filesystem. This limit affects only the number of
199767f8919635c4928607450d9e0abb932109ceToomas Soome * snapshot files that can be recorded within the superblock so
199767f8919635c4928607450d9e0abb932109ceToomas Soome * that they can be found when the filesystem is mounted. However,
199767f8919635c4928607450d9e0abb932109ceToomas Soome * maintaining too many will slow the filesystem performance, so
199767f8919635c4928607450d9e0abb932109ceToomas Soome * having this limit is a good idea.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Used to identify special blocks in snapshots:
199767f8919635c4928607450d9e0abb932109ceToomas Soome * BLK_NOCOPY - A block that was unallocated at the time the snapshot
199767f8919635c4928607450d9e0abb932109ceToomas Soome * was taken, hence does not need to be copied when written.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * BLK_SNAP - A block held by another snapshot that is not needed by this
199767f8919635c4928607450d9e0abb932109ceToomas Soome * snapshot. When the other snapshot is freed, the BLK_SNAP entries
199767f8919635c4928607450d9e0abb932109ceToomas Soome * are converted to BLK_NOCOPY. These are needed to allow fsck to
199767f8919635c4928607450d9e0abb932109ceToomas Soome * identify blocks that are in use by other snapshots (which are
199767f8919635c4928607450d9e0abb932109ceToomas Soome * expunged from this snapshot).
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Sysctl values for the fast filesystem.
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FFS_ADJ_REFCNT 1 /* adjust inode reference count */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FFS_ADJ_BLKCNT 2 /* adjust inode used block count */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FFS_BLK_FREE 3 /* free range of blocks in map */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FFS_DIR_FREE 4 /* free specified dir inodes in map */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FFS_FILE_FREE 5 /* free specified file inodes in map */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FFS_SET_FLAGS 6 /* set filesystem flags */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FFS_ADJ_NDIR 7 /* adjust number of directories */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FFS_ADJ_NBFREE 8 /* adjust number of free blocks */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FFS_ADJ_NIFREE 9 /* adjust number of free inodes */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FFS_ADJ_NFFREE 10 /* adjust number of free frags */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FFS_ADJ_NUMCLUSTERS 11 /* adjust number of free clusters */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FFS_SET_CWD 12 /* set current directory */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FFS_SET_DOTDOT 13 /* set inode number for ".." */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FFS_UNLINK 14 /* remove a name in the filesystem */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FFS_SET_INODE 15 /* update an on-disk inode */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FFS_SET_BUFOUTPUT 16 /* set buffered writing on descriptor */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FFS_MAXID 16 /* number of valid ffs ids */
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Command structure passed in to the filesystem to adjust filesystem values.
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FFS_CMD_VERSION 0x19790518 /* version ID */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t version; /* version of command structure */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t handle; /* reference to filesystem to be changed */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int64_t value; /* inode or block number to be affected */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int64_t size; /* amount or range to be adjusted */
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Per cylinder group information; summarized in blocks allocated
199767f8919635c4928607450d9e0abb932109ceToomas Soome * from first cylinder group data blocks. These blocks have to be
199767f8919635c4928607450d9e0abb932109ceToomas Soome * read in from fs_csaddr (size fs_cssize) in addition to the
199767f8919635c4928607450d9e0abb932109ceToomas Soome * super block.
199767f8919635c4928607450d9e0abb932109ceToomas Soome int64_t cs_numclusters; /* number of free clusters */
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Super block for an FFS filesystem.
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_firstfield; /* historic filesystem linked list, */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_unused_1; /* used for incore super blocks */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_sblkno; /* offset of super-block in filesys */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_cblkno; /* offset of cyl-block in filesys */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_iblkno; /* offset of inode-blocks in filesys */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_dblkno; /* offset of first data after cg */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_old_cgoffset; /* cylinder group offset in cylinder */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_old_cgmask; /* used to calc mod fs_ntrak */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_old_size; /* number of blocks in fs */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_old_dsize; /* number of data blocks in fs */
199767f8919635c4928607450d9e0abb932109ceToomas Soome u_int32_t fs_ncg; /* number of cylinder groups */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_bsize; /* size of basic blocks in fs */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_fsize; /* size of frag blocks in fs */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_frag; /* number of frags in a block in fs */
199767f8919635c4928607450d9e0abb932109ceToomas Soome/* these are configuration parameters */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_minfree; /* minimum percentage of free blocks */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_old_rotdelay; /* num of ms for optimal next block */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_old_rps; /* disk revolutions per second */
199767f8919635c4928607450d9e0abb932109ceToomas Soome/* these fields can be computed from the others */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_bmask; /* ``blkoff'' calc of blk offsets */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_fmask; /* ``fragoff'' calc of frag offsets */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_bshift; /* ``lblkno'' calc of logical blkno */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_fshift; /* ``numfrags'' calc number of frags */
199767f8919635c4928607450d9e0abb932109ceToomas Soome/* these are configuration parameters */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_maxcontig; /* max number of contiguous blks */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_maxbpg; /* max number of blks per cyl group */
199767f8919635c4928607450d9e0abb932109ceToomas Soome/* these fields can be computed from the others */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_fragshift; /* block to frag shift */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_fsbtodb; /* fsbtodb and dbtofsb shift constant */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_sbsize; /* actual size of super block */
199767f8919635c4928607450d9e0abb932109ceToomas Soome /* old fs_csshift */
199767f8919635c4928607450d9e0abb932109ceToomas Soome/* yet another configuration parameter */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_optim; /* optimization preference, see below */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_old_npsect; /* # sectors/track including spares */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_old_interleave; /* hardware sector interleave */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_old_trackskew; /* sector 0 skew, per track */
199767f8919635c4928607450d9e0abb932109ceToomas Soome/* sizes determined by number of cylinder groups and their sizes */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_old_csaddr; /* blk addr of cyl grp summary area */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_cssize; /* size of cyl grp summary area */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_old_ncyl; /* cylinders in filesystem */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_fpg; /* blocks per group * fs_frag */
199767f8919635c4928607450d9e0abb932109ceToomas Soome/* this data must be re-computed after crashes */
199767f8919635c4928607450d9e0abb932109ceToomas Soome struct csum fs_old_cstotal; /* cylinder summary information */
199767f8919635c4928607450d9e0abb932109ceToomas Soome/* these fields are cleared at mount time */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int8_t fs_fmod; /* super block modified flag */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int8_t fs_clean; /* filesystem is clean flag */
199767f8919635c4928607450d9e0abb932109ceToomas Soome u_char fs_fsmnt[MAXMNTLEN]; /* name mounted on */
199767f8919635c4928607450d9e0abb932109ceToomas Soome u_char fs_volname[MAXVOLLEN]; /* volume name */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_pad; /* due to alignment of fs_swuid */
199767f8919635c4928607450d9e0abb932109ceToomas Soome/* these fields retain the current block allocation info */
199767f8919635c4928607450d9e0abb932109ceToomas Soome void *fs_ocsp[NOCSPTRS]; /* padding; was list of fs_cs buffers */
199767f8919635c4928607450d9e0abb932109ceToomas Soome u_int8_t *fs_contigdirs; /* (u) # of contig. allocated dirs */
199767f8919635c4928607450d9e0abb932109ceToomas Soome struct csum *fs_csp; /* (u) cg summary info buffer */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t *fs_maxcluster; /* (u) max cluster in each cyl group */
199767f8919635c4928607450d9e0abb932109ceToomas Soome u_int *fs_active; /* (u) used by snapshots to track fs */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_old_cpc; /* cyl per cycle in postbl */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_maxbsize; /* maximum blocking factor permitted */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int64_t fs_unrefs; /* number of unreferenced inodes */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int64_t fs_providersize; /* size of underlying GEOM provider */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int64_t fs_metaspace; /* size of area reserved for metadata */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int64_t fs_sparecon64[14]; /* old rotation block list head */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int64_t fs_sblockloc; /* byte offset of standard superblock */
199767f8919635c4928607450d9e0abb932109ceToomas Soome struct csum_total fs_cstotal; /* (u) cylinder summary information */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int64_t fs_dsize; /* number of data blocks in fs */
199767f8919635c4928607450d9e0abb932109ceToomas Soome ufs2_daddr_t fs_csaddr; /* blk addr of cyl grp summary area */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int64_t fs_pendingblocks; /* (u) blocks being freed */
199767f8919635c4928607450d9e0abb932109ceToomas Soome u_int32_t fs_pendinginodes; /* (u) inodes being freed */
199767f8919635c4928607450d9e0abb932109ceToomas Soome uint32_t fs_snapinum[FSMAXSNAP];/* list of snapshot inode numbers */
199767f8919635c4928607450d9e0abb932109ceToomas Soome u_int32_t fs_avgfilesize; /* expected average file size */
199767f8919635c4928607450d9e0abb932109ceToomas Soome u_int32_t fs_avgfpdir; /* expected # of files per directory */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_save_cgsize; /* save real cg size to use fs_bsize */
199767f8919635c4928607450d9e0abb932109ceToomas Soome ufs_time_t fs_mtime; /* Last mount or fsck time. */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_sparecon32[23]; /* reserved for future constants */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_contigsumsize; /* size of cluster summary array */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_maxsymlinklen; /* max length of an internal symlink */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_old_inodefmt; /* format of on-disk inodes */
199767f8919635c4928607450d9e0abb932109ceToomas Soome u_int64_t fs_maxfilesize; /* maximum representable file size */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int64_t fs_qbmask; /* ~fs_bmask for use with 64-bit size */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int64_t fs_qfmask; /* ~fs_fmask for use with 64-bit size */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_state; /* validate fs_clean field */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_old_postblformat; /* format of positional layout tables */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t fs_old_nrpos; /* number of rotational positions */
199767f8919635c4928607450d9e0abb932109ceToomas Soome /* old fs_rotbloff */
199767f8919635c4928607450d9e0abb932109ceToomas Soome/* Sanity checking. */
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Filesystem identification
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FS_UFS1_MAGIC 0x011954 /* UFS1 fast filesystem magic number */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FS_UFS2_MAGIC 0x19540119 /* UFS2 fast filesystem magic number */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FS_BAD_MAGIC 0x19960408 /* UFS incomplete newfs magic number */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FS_OKAY 0x7c269d38 /* superblock checksum */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FS_42INODEFMT -1 /* 4.2BSD inode format */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FS_44INODEFMT 2 /* 4.4BSD inode format */
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Preference for optimization.
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FS_OPTTIME 0 /* minimize allocation time */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FS_OPTSPACE 1 /* minimize disk fragmentation */
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Filesystem flags.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * The FS_UNCLEAN flag is set by the kernel when the filesystem was
199767f8919635c4928607450d9e0abb932109ceToomas Soome * mounted with fs_clean set to zero. The FS_DOSOFTDEP flag indicates
199767f8919635c4928607450d9e0abb932109ceToomas Soome * that the filesystem should be managed by the soft updates code.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Note that the FS_NEEDSFSCK flag is set and cleared only by the
199767f8919635c4928607450d9e0abb932109ceToomas Soome * fsck utility. It is set when background fsck finds an unexpected
199767f8919635c4928607450d9e0abb932109ceToomas Soome * inconsistency which requires a traditional foreground fsck to be
199767f8919635c4928607450d9e0abb932109ceToomas Soome * run. Such inconsistencies should only be found after an uncorrectable
199767f8919635c4928607450d9e0abb932109ceToomas Soome * disk error. A foreground fsck will clear the FS_NEEDSFSCK flag when
199767f8919635c4928607450d9e0abb932109ceToomas Soome * it has successfully cleaned up the filesystem. The kernel uses this
199767f8919635c4928607450d9e0abb932109ceToomas Soome * flag to enforce that inconsistent filesystems be mounted read-only.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * The FS_INDEXDIRS flag when set indicates that the kernel maintains
199767f8919635c4928607450d9e0abb932109ceToomas Soome * on-disk auxiliary indexes (such as B-trees) for speeding directory
199767f8919635c4928607450d9e0abb932109ceToomas Soome * accesses. Kernels that do not support auxiliary indicies clear the
199767f8919635c4928607450d9e0abb932109ceToomas Soome * flag to indicate that the indicies need to be rebuilt (by fsck) before
199767f8919635c4928607450d9e0abb932109ceToomas Soome * they can be used.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * FS_ACLS indicates that POSIX.1e ACLs are administratively enabled
199767f8919635c4928607450d9e0abb932109ceToomas Soome * for the file system, so they should be loaded from extended attributes,
199767f8919635c4928607450d9e0abb932109ceToomas Soome * observed for access control purposes, and be administered by object
199767f8919635c4928607450d9e0abb932109ceToomas Soome * owners. FS_NFS4ACLS indicates that NFSv4 ACLs are administratively
199767f8919635c4928607450d9e0abb932109ceToomas Soome * enabled. This flag is mutually exclusive with FS_ACLS. FS_MULTILABEL
199767f8919635c4928607450d9e0abb932109ceToomas Soome * indicates that the TrustedBSD MAC Framework should attempt to back MAC
199767f8919635c4928607450d9e0abb932109ceToomas Soome * labels into extended attributes on the file system rather than maintain
199767f8919635c4928607450d9e0abb932109ceToomas Soome * a single mount label for all objects.
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FS_UNCLEAN 0x0001 /* filesystem not clean at mount */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FS_DOSOFTDEP 0x0002 /* filesystem using soft dependencies */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FS_NEEDSFSCK 0x0004 /* filesystem needs sync fsck before mount */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FS_SUJ 0x0008 /* Filesystem using softupdate journal */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FS_ACLS 0x0010 /* file system has POSIX.1e ACLs enabled */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FS_MULTILABEL 0x0020 /* file system is MAC multi-label */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FS_GJOURNAL 0x0040 /* gjournaled file system */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FS_FLAGS_UPDATED 0x0080 /* flags have been moved to new location */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FS_NFS4ACLS 0x0100 /* file system has NFSv4 ACLs enabled */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FS_INDEXDIRS 0x0200 /* kernel supports indexed directories */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define FS_TRIM 0x0400 /* issue BIO_DELETE for deleted blocks */
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Macros to access bits in the fs_active array.
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define ACTIVECGNUM(fs, cg) ((fs)->fs_active[(cg) / (NBBY * sizeof(int))])
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define ACTIVECGOFF(cg) (1 << ((cg) % (NBBY * sizeof(int))))
199767f8919635c4928607450d9e0abb932109ceToomas Soome ACTIVECGNUM((fs), (cg)) |= ACTIVECGOFF((cg)); \
199767f8919635c4928607450d9e0abb932109ceToomas Soome ACTIVECGNUM((fs), (cg)) &= ~ACTIVECGOFF((cg)); \
199767f8919635c4928607450d9e0abb932109ceToomas Soome * The size of a cylinder group is calculated by CGSIZE. The maximum size
199767f8919635c4928607450d9e0abb932109ceToomas Soome * is limited by the fact that cylinder groups are at most one block.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Its size is derived from the size of the maps maintained in the
199767f8919635c4928607450d9e0abb932109ceToomas Soome * cylinder group and the (struct cg) size.
199767f8919635c4928607450d9e0abb932109ceToomas Soome /* base cg */ (sizeof(struct cg) + sizeof(int32_t) + \
199767f8919635c4928607450d9e0abb932109ceToomas Soome /* old btotoff */ (fs)->fs_old_cpg * sizeof(int32_t) + \
199767f8919635c4928607450d9e0abb932109ceToomas Soome /* old boff */ (fs)->fs_old_cpg * sizeof(u_int16_t) + \
199767f8919635c4928607450d9e0abb932109ceToomas Soome /* inode map */ howmany((fs)->fs_ipg, NBBY) + \
199767f8919635c4928607450d9e0abb932109ceToomas Soome /* if present */ ((fs)->fs_contigsumsize <= 0 ? 0 : \
199767f8919635c4928607450d9e0abb932109ceToomas Soome /* cluster sum */ (fs)->fs_contigsumsize * sizeof(int32_t) + \
199767f8919635c4928607450d9e0abb932109ceToomas Soome /* cluster map */ howmany(fragstoblks(fs, (fs)->fs_fpg), NBBY)))
199767f8919635c4928607450d9e0abb932109ceToomas Soome * The minimal number of cylinder groups that should be created.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Convert cylinder group to base address of its global summary info.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Cylinder group block for a filesystem.
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t cg_firstfield; /* historic cyl groups linked list */
199767f8919635c4928607450d9e0abb932109ceToomas Soome u_int32_t cg_cgx; /* we are the cgx'th cylinder group */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int16_t cg_old_ncyl; /* number of cyl's this cg */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int16_t cg_old_niblk; /* number of inode blocks this cg */
199767f8919635c4928607450d9e0abb932109ceToomas Soome u_int32_t cg_ndblk; /* number of data blocks this cg */
199767f8919635c4928607450d9e0abb932109ceToomas Soome struct csum cg_cs; /* cylinder summary information */
199767f8919635c4928607450d9e0abb932109ceToomas Soome u_int32_t cg_rotor; /* position of last used block */
199767f8919635c4928607450d9e0abb932109ceToomas Soome u_int32_t cg_frotor; /* position of last used frag */
199767f8919635c4928607450d9e0abb932109ceToomas Soome u_int32_t cg_irotor; /* position of last used inode */
199767f8919635c4928607450d9e0abb932109ceToomas Soome u_int32_t cg_frsum[MAXFRAG]; /* counts of available frags */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t cg_old_btotoff; /* (int32) block totals per cylinder */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t cg_old_boff; /* (u_int16) free block positions */
199767f8919635c4928607450d9e0abb932109ceToomas Soome u_int32_t cg_iusedoff; /* (u_int8) used inode map */
199767f8919635c4928607450d9e0abb932109ceToomas Soome u_int32_t cg_freeoff; /* (u_int8) free block map */
199767f8919635c4928607450d9e0abb932109ceToomas Soome u_int32_t cg_nextfreeoff; /* (u_int8) next available space */
199767f8919635c4928607450d9e0abb932109ceToomas Soome u_int32_t cg_clustersumoff; /* (u_int32) counts of avail clusters */
199767f8919635c4928607450d9e0abb932109ceToomas Soome u_int32_t cg_clusteroff; /* (u_int8) free cluster map */
199767f8919635c4928607450d9e0abb932109ceToomas Soome u_int32_t cg_nclusterblks; /* number of clusters this cg */
199767f8919635c4928607450d9e0abb932109ceToomas Soome u_int32_t cg_niblk; /* number of inode blocks this cg */
199767f8919635c4928607450d9e0abb932109ceToomas Soome u_int32_t cg_initediblk; /* last initialized inode */
199767f8919635c4928607450d9e0abb932109ceToomas Soome u_int32_t cg_unrefs; /* number of unreferenced inodes */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int32_t cg_sparecon32[2]; /* reserved for future use */
199767f8919635c4928607450d9e0abb932109ceToomas Soome int64_t cg_sparecon64[3]; /* reserved for future use */
199767f8919635c4928607450d9e0abb932109ceToomas Soome u_int8_t cg_space[1]; /* space for cylinder group maps */
199767f8919635c4928607450d9e0abb932109ceToomas Soome/* actually longer */
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Macros for access to cylinder group array structures
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define cg_chkmagic(cgp) ((cgp)->cg_magic == CG_MAGIC)
199767f8919635c4928607450d9e0abb932109ceToomas Soome ((u_int8_t *)((u_int8_t *)(cgp) + (cgp)->cg_iusedoff))
199767f8919635c4928607450d9e0abb932109ceToomas Soome ((u_int8_t *)((u_int8_t *)(cgp) + (cgp)->cg_freeoff))
199767f8919635c4928607450d9e0abb932109ceToomas Soome ((u_int8_t *)((u_int8_t *)(cgp) + (cgp)->cg_clusteroff))
199767f8919635c4928607450d9e0abb932109ceToomas Soome ((int32_t *)((uintptr_t)(cgp) + (cgp)->cg_clustersumoff))
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Turn filesystem block numbers into disk block addresses.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * This maps filesystem blocks to device size blocks.
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define fsbtodb(fs, b) ((daddr_t)(b) << (fs)->fs_fsbtodb)
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define dbtofsb(fs, b) ((b) >> (fs)->fs_fsbtodb)
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Cylinder group macros to locate things in cylinder groups.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * They calc filesystem addresses of cylinder group data structures.
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define cgbase(fs, c) (((ufs2_daddr_t)(fs)->fs_fpg) * (c))
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define cgdata(fs, c) (cgdmin(fs, c) + (fs)->fs_metaspace) /* data zone */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define cgmeta(fs, c) (cgdmin(fs, c)) /* meta data */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define cgdmin(fs, c) (cgstart(fs, c) + (fs)->fs_dblkno) /* 1st data */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define cgimin(fs, c) (cgstart(fs, c) + (fs)->fs_iblkno) /* inode blk */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define cgsblock(fs, c) (cgstart(fs, c) + (fs)->fs_sblkno) /* super blk */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define cgtod(fs, c) (cgstart(fs, c) + (fs)->fs_cblkno) /* cg block */
199767f8919635c4928607450d9e0abb932109ceToomas Soome ((fs)->fs_magic == FS_UFS2_MAGIC ? cgbase(fs, c) : \
199767f8919635c4928607450d9e0abb932109ceToomas Soome (cgbase(fs, c) + (fs)->fs_old_cgoffset * ((c) & ~((fs)->fs_old_cgmask))))
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Macros for handling inode numbers:
199767f8919635c4928607450d9e0abb932109ceToomas Soome * inode number to filesystem block offset.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * inode number to cylinder group number.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * inode number to filesystem block address.
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define ino_to_cg(fs, x) (((ino_t)(x)) / (fs)->fs_ipg)
199767f8919635c4928607450d9e0abb932109ceToomas Soome ((ufs2_daddr_t)(cgimin(fs, ino_to_cg(fs, (ino_t)(x))) + \
199767f8919635c4928607450d9e0abb932109ceToomas Soome (blkstofrags((fs), ((((ino_t)(x)) % (fs)->fs_ipg) / INOPB(fs))))))
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define ino_to_fsbo(fs, x) (((ino_t)(x)) % INOPB(fs))
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Give cylinder group number for a filesystem block.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Give cylinder group block number for a filesystem block.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Extract the bits for a block from a map.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Compute the cylinder and rotational position of a cyl block addr.
199767f8919635c4928607450d9e0abb932109ceToomas Soome (((map)[(loc) / NBBY] >> ((loc) % NBBY)) & (0xff >> (NBBY - (fs)->fs_frag)))
199767f8919635c4928607450d9e0abb932109ceToomas Soome * The following macros optimize certain frequently calculated
199767f8919635c4928607450d9e0abb932109ceToomas Soome * quantities by using shifts and masks in place of divisions
199767f8919635c4928607450d9e0abb932109ceToomas Soome * modulos and multiplications.
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define blkoff(fs, loc) /* calculates (loc % fs->fs_bsize) */ \
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define fragoff(fs, loc) /* calculates (loc % fs->fs_fsize) */ \
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define lfragtosize(fs, frag) /* calculates ((off_t)frag * fs->fs_fsize) */ \
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define lblktosize(fs, blk) /* calculates ((off_t)blk * fs->fs_bsize) */ \
199767f8919635c4928607450d9e0abb932109ceToomas Soome/* Use this only when `blk' is known to be small, e.g., < NDADDR. */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define smalllblktosize(fs, blk) /* calculates (blk * fs->fs_bsize) */ \
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define lblkno(fs, loc) /* calculates (loc / fs->fs_bsize) */ \
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define numfrags(fs, loc) /* calculates (loc / fs->fs_fsize) */ \
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define blkroundup(fs, size) /* calculates roundup(size, fs->fs_bsize) */ \
199767f8919635c4928607450d9e0abb932109ceToomas Soome (((size) + (fs)->fs_bsize - 1) & (fs)->fs_bmask)
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define fragroundup(fs, size) /* calculates roundup(size, fs->fs_fsize) */ \
199767f8919635c4928607450d9e0abb932109ceToomas Soome (((size) + (fs)->fs_fsize - 1) & (fs)->fs_fmask)
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define fragstoblks(fs, frags) /* calculates (frags / fs->fs_frag) */ \
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define blkstofrags(fs, blks) /* calculates (blks * fs->fs_frag) */ \
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define fragnum(fs, fsb) /* calculates (fsb % fs->fs_frag) */ \
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define blknum(fs, fsb) /* calculates rounddown(fsb, fs->fs_frag) */ \
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Determine the number of available frags given a
199767f8919635c4928607450d9e0abb932109ceToomas Soome * percentage to hold in reserve.
199767f8919635c4928607450d9e0abb932109ceToomas Soome (blkstofrags((fs), (fs)->fs_cstotal.cs_nbfree) + \
199767f8919635c4928607450d9e0abb932109ceToomas Soome (((off_t)((fs)->fs_dsize)) * (percentreserved) / 100))
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Determining the size of a file block in the filesystem.
199767f8919635c4928607450d9e0abb932109ceToomas Soome (((lbn) >= NDADDR || (ip)->i_size >= smalllblktosize(fs, (lbn) + 1)) \
199767f8919635c4928607450d9e0abb932109ceToomas Soome (((lbn) >= NDADDR || (size) >= ((lbn) + 1) << (fs)->fs_bshift) \
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Number of indirects in a filesystem block.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Indirect lbns are aligned on NDADDR addresses where single indirects
199767f8919635c4928607450d9e0abb932109ceToomas Soome * are the negated address of the lowest lbn reachable, double indirects
199767f8919635c4928607450d9e0abb932109ceToomas Soome * are this lbn - 1 and triple indirects are this lbn - 2. This yields
199767f8919635c4928607450d9e0abb932109ceToomas Soome * an unusual bit order to determine level.
199767f8919635c4928607450d9e0abb932109ceToomas Soomestatic inline int
199767f8919635c4928607450d9e0abb932109ceToomas Soome return (-1);
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Number of inodes in a secondary storage block/fragment.
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define INOPF(fs) ((fs)->fs_inopb >> (fs)->fs_fragshift)
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Softdep journal record format.
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define JOP_ADDREF 1 /* Add a reference to an inode. */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define JOP_REMREF 2 /* Remove a reference from an inode. */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define JOP_FREEBLK 4 /* Free a block or a tree of blocks. */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define JOP_MVREF 5 /* Move a reference from one off to another. */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define JOP_TRUNC 6 /* Partial truncation record. */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define JOP_SYNC 7 /* fsync() complete record. */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define JREC_SIZE 32 /* Record and segment header size. */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define SUJ_MIN (4 * 1024 * 1024) /* Minimum journal size */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define SUJ_MAX (32 * 1024 * 1024) /* Maximum journal size */
199767f8919635c4928607450d9e0abb932109ceToomas Soome#define SUJ_FILE ".sujournal" /* Journal file name */
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Size of the segment record header. There is at most one for each disk
199767f8919635c4928607450d9e0abb932109ceToomas Soome * block in the journal. The segment header is followed by an array of
199767f8919635c4928607450d9e0abb932109ceToomas Soome * records. fsck depends on the first element in each record being 'op'
199767f8919635c4928607450d9e0abb932109ceToomas Soome * and the second being 'ino'. Segments may span multiple disk blocks but
199767f8919635c4928607450d9e0abb932109ceToomas Soome * the header is present on each.
199767f8919635c4928607450d9e0abb932109ceToomas Soome uint64_t jsr_oldest; /* Oldest valid sequence number */
199767f8919635c4928607450d9e0abb932109ceToomas Soome uint16_t jsr_blocks; /* Count of device bsize blocks. */
199767f8919635c4928607450d9e0abb932109ceToomas Soome uint32_t jsr_crc; /* 32bit crc of the valid space */
199767f8919635c4928607450d9e0abb932109ceToomas Soome ufs_time_t jsr_time; /* timestamp for mount instance */
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Reference record. Records a single link count modification.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Move record. Records a reference moving within a directory block. The
199767f8919635c4928607450d9e0abb932109ceToomas Soome * nlink is unchanged but we must search both locations.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Block record. A set of frags or tree of blocks starting at an indirect are
199767f8919635c4928607450d9e0abb932109ceToomas Soome * freed or a set of frags are allocated.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * Truncation record. Records a partial truncation so that it may be
199767f8919635c4928607450d9e0abb932109ceToomas Soome * completed at check time. Also used for sync records.
199767f8919635c4928607450d9e0abb932109ceToomas Soome * IOCTLs used for filesystem write suspension.