362 lines
14 KiB
C
362 lines
14 KiB
C
/* $NetBSD: lfs.h,v 1.6 1994/12/21 20:01:01 mycroft Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1991, 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 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.
|
|
*
|
|
* @(#)lfs.h 8.5 (Berkeley) 7/8/94
|
|
*/
|
|
|
|
#define LFS_LABELPAD 8192 /* LFS label size */
|
|
#define LFS_SBPAD 8192 /* LFS superblock size */
|
|
|
|
/*
|
|
* XXX
|
|
* This is a kluge and NEEDS to go away.
|
|
*
|
|
* Right now, ufs code handles most of the calls for directory operations
|
|
* such as create, mkdir, link, etc. As a result VOP_UPDATE is being
|
|
* called with waitfor set (since ffs does these things synchronously).
|
|
* Since LFS does not want to do these synchronously, we treat the last
|
|
* argument to lfs_update as a set of flags. If LFS_SYNC is set, then
|
|
* the update should be synchronous, if not, do it asynchronously.
|
|
* Unfortunately, this means that LFS won't work with NFS yet because
|
|
* NFS goes through paths that will make normal calls to ufs which will
|
|
* call lfs with a last argument of 1.
|
|
*/
|
|
#define LFS_SYNC 0x02
|
|
|
|
/* On-disk and in-memory checkpoint segment usage structure. */
|
|
typedef struct segusage SEGUSE;
|
|
struct segusage {
|
|
u_int32_t su_nbytes; /* number of live bytes */
|
|
u_int32_t su_lastmod; /* SEGUSE last modified timestamp */
|
|
u_int16_t su_nsums; /* number of summaries in segment */
|
|
u_int16_t su_ninos; /* number of inode blocks in seg */
|
|
|
|
#define SEGUSE_ACTIVE 0x01 /* segment is currently being written */
|
|
#define SEGUSE_DIRTY 0x02 /* segment has data in it */
|
|
#define SEGUSE_SUPERBLOCK 0x04 /* segment contains a superblock */
|
|
u_int32_t su_flags;
|
|
};
|
|
|
|
#define SEGUPB(fs) (1 << (fs)->lfs_sushift)
|
|
#define SEGTABSIZE_SU(fs) \
|
|
(((fs)->lfs_nseg + SEGUPB(fs) - 1) >> (fs)->lfs_sushift)
|
|
|
|
/* On-disk file information. One per file with data blocks in the segment. */
|
|
typedef struct finfo FINFO;
|
|
struct finfo {
|
|
u_int32_t fi_nblocks; /* number of blocks */
|
|
u_int32_t fi_version; /* version number */
|
|
u_int32_t fi_ino; /* inode number */
|
|
daddr_t fi_blocks[1]; /* array of logical block numbers */
|
|
};
|
|
|
|
/* On-disk and in-memory super block. */
|
|
struct lfs {
|
|
#define LFS_MAGIC 0x070162
|
|
u_int32_t lfs_magic; /* magic number */
|
|
#define LFS_VERSION 1
|
|
u_int32_t lfs_version; /* version number */
|
|
|
|
u_int32_t lfs_size; /* number of blocks in fs */
|
|
u_int32_t lfs_ssize; /* number of blocks per segment */
|
|
u_int32_t lfs_dsize; /* number of disk blocks in fs */
|
|
u_int32_t lfs_bsize; /* file system block size */
|
|
u_int32_t lfs_fsize; /* size of frag blocks in fs */
|
|
u_int32_t lfs_frag; /* number of frags in a block in fs */
|
|
|
|
/* Checkpoint region. */
|
|
ino_t lfs_free; /* start of the free list */
|
|
u_int32_t lfs_bfree; /* number of free disk blocks */
|
|
u_int32_t lfs_nfiles; /* number of allocated inodes */
|
|
int32_t lfs_avail; /* blocks available for writing */
|
|
u_int32_t lfs_uinodes; /* inodes in cache not yet on disk */
|
|
daddr_t lfs_idaddr; /* inode file disk address */
|
|
ino_t lfs_ifile; /* inode file inode number */
|
|
daddr_t lfs_lastseg; /* address of last segment written */
|
|
daddr_t lfs_nextseg; /* address of next segment to write */
|
|
daddr_t lfs_curseg; /* current segment being written */
|
|
daddr_t lfs_offset; /* offset in curseg for next partial */
|
|
daddr_t lfs_lastpseg; /* address of last partial written */
|
|
u_int32_t lfs_tstamp; /* time stamp */
|
|
|
|
/* These are configuration parameters. */
|
|
u_int32_t lfs_minfree; /* minimum percentage of free blocks */
|
|
|
|
/* These fields can be computed from the others. */
|
|
u_int64_t lfs_maxfilesize; /* maximum representable file size */
|
|
u_int32_t lfs_dbpseg; /* disk blocks per segment */
|
|
u_int32_t lfs_inopb; /* inodes per block */
|
|
u_int32_t lfs_ifpb; /* IFILE entries per block */
|
|
u_int32_t lfs_sepb; /* SEGUSE entries per block */
|
|
u_int32_t lfs_nindir; /* indirect pointers per block */
|
|
u_int32_t lfs_nseg; /* number of segments */
|
|
u_int32_t lfs_nspf; /* number of sectors per fragment */
|
|
u_int32_t lfs_cleansz; /* cleaner info size in blocks */
|
|
u_int32_t lfs_segtabsz; /* segment table size in blocks */
|
|
|
|
u_int32_t lfs_segmask; /* calculate offset within a segment */
|
|
u_int32_t lfs_segshift; /* fast mult/div for segments */
|
|
u_int32_t lfs_bmask; /* calc block offset from file offset */
|
|
u_int32_t lfs_bshift; /* calc block number from file offset */
|
|
u_int32_t lfs_ffmask; /* calc frag offset from file offset */
|
|
u_int32_t lfs_ffshift; /* fast mult/div for frag from file */
|
|
u_int32_t lfs_fbmask; /* calc frag offset from block offset */
|
|
u_int32_t lfs_fbshift; /* fast mult/div for frag from block */
|
|
u_int32_t lfs_fsbtodb; /* fsbtodb and dbtofsb shift constant */
|
|
u_int32_t lfs_sushift; /* fast mult/div for segusage table */
|
|
|
|
int32_t lfs_maxsymlinklen; /* max length of an internal symlink */
|
|
|
|
#define LFS_MIN_SBINTERVAL 5 /* minimum superblock segment spacing */
|
|
#define LFS_MAXNUMSB 10 /* superblock disk offsets */
|
|
daddr_t lfs_sboffs[LFS_MAXNUMSB];
|
|
|
|
/* Checksum -- last valid disk field. */
|
|
u_int32_t lfs_cksum; /* checksum for superblock checking */
|
|
|
|
/* These fields are set at mount time and are meaningless on disk. */
|
|
struct segment *lfs_sp; /* current segment being written */
|
|
struct vnode *lfs_ivnode; /* vnode for the ifile */
|
|
u_long lfs_seglock; /* single-thread the segment writer */
|
|
pid_t lfs_lockpid; /* pid of lock holder */
|
|
u_long lfs_iocount; /* number of ios pending */
|
|
u_long lfs_writer; /* don't allow any dirops to start */
|
|
u_long lfs_dirops; /* count of active directory ops */
|
|
u_long lfs_doifile; /* Write ifile blocks on next write */
|
|
u_long lfs_nactive; /* Number of segments since last ckp */
|
|
int8_t lfs_fmod; /* super block modified flag */
|
|
int8_t lfs_clean; /* file system is clean flag */
|
|
int8_t lfs_ronly; /* mounted read-only flag */
|
|
int8_t lfs_flags; /* currently unused flag */
|
|
u_char lfs_fsmnt[MNAMELEN]; /* name mounted on */
|
|
|
|
int32_t lfs_pad[40]; /* round to 512 bytes */
|
|
};
|
|
|
|
/*
|
|
* Inode 0: out-of-band inode number
|
|
* Inode 1: IFILE inode number
|
|
* Inode 2: root inode
|
|
* Inode 3: lost+found inode number
|
|
*/
|
|
#define LFS_UNUSED_INUM 0 /* out of band inode number */
|
|
#define LFS_IFILE_INUM 1 /* IFILE inode number */
|
|
#define LOSTFOUNDINO 3 /* lost+found inode number */
|
|
#define LFS_FIRST_INUM 4 /* first free inode number */
|
|
|
|
/* Address calculations for metadata located in the inode */
|
|
#define S_INDIR(fs) -NDADDR
|
|
#define D_INDIR(fs) (S_INDIR(fs) - NINDIR(fs) - 1)
|
|
#define T_INDIR(fs) (D_INDIR(fs) - NINDIR(fs) * NINDIR(fs) - 1)
|
|
|
|
/* Unassigned disk address. */
|
|
#define UNASSIGNED -1
|
|
|
|
/* Unused logical block number */
|
|
#define LFS_UNUSED_LBN -1
|
|
|
|
typedef struct ifile IFILE;
|
|
struct ifile {
|
|
u_int32_t if_version; /* inode version number */
|
|
#define LFS_UNUSED_DADDR 0 /* out-of-band daddr */
|
|
daddr_t if_daddr; /* inode disk address */
|
|
ino_t if_nextfree; /* next-unallocated inode */
|
|
};
|
|
|
|
/*
|
|
* Cleaner information structure. This resides in the ifile and is used
|
|
* to pass information between the cleaner and the kernel.
|
|
*/
|
|
typedef struct _cleanerinfo {
|
|
u_int32_t clean; /* K: number of clean segments */
|
|
u_int32_t dirty; /* K: number of dirty segments */
|
|
} CLEANERINFO;
|
|
|
|
#define CLEANSIZE_SU(fs) \
|
|
((sizeof(CLEANERINFO) + (fs)->lfs_bsize - 1) >> (fs)->lfs_bshift)
|
|
|
|
/*
|
|
* All summary blocks are the same size, so we can always read a summary
|
|
* block easily from a segment.
|
|
*/
|
|
#define LFS_SUMMARY_SIZE 512
|
|
|
|
/* On-disk segment summary information */
|
|
typedef struct segsum SEGSUM;
|
|
struct segsum {
|
|
u_int32_t ss_sumsum; /* check sum of summary block */
|
|
u_int32_t ss_datasum; /* check sum of data */
|
|
daddr_t ss_next; /* next segment */
|
|
u_int32_t ss_create; /* creation time stamp */
|
|
u_int16_t ss_nfinfo; /* number of file info structures */
|
|
u_int16_t ss_ninos; /* number of inodes in summary */
|
|
|
|
#define SS_DIROP 0x01 /* segment begins a dirop */
|
|
#define SS_CONT 0x02 /* more partials to finish this write*/
|
|
u_int16_t ss_flags; /* used for directory operations */
|
|
u_int16_t ss_pad; /* extra space */
|
|
/* FINFO's and inode daddr's... */
|
|
};
|
|
|
|
/* NINDIR is the number of indirects in a file system block. */
|
|
#define NINDIR(fs) ((fs)->lfs_nindir)
|
|
|
|
/* INOPB is the number of inodes in a secondary storage block. */
|
|
#define INOPB(fs) ((fs)->lfs_inopb)
|
|
|
|
#define blksize(fs) ((fs)->lfs_bsize)
|
|
#define blkoff(fs, loc) ((loc) & (fs)->lfs_bmask)
|
|
#define fsbtodb(fs, b) ((b) << (fs)->lfs_fsbtodb)
|
|
#define dbtofsb(fs, b) ((b) >> (fs)->lfs_fsbtodb)
|
|
#define lblkno(fs, loc) ((loc) >> (fs)->lfs_bshift)
|
|
#define lblktosize(fs, blk) ((blk) << (fs)->lfs_bshift)
|
|
#define numfrags(fs, loc) /* calculates (loc / fs->fs_fsize) */ \
|
|
((loc) >> (fs)->lfs_bshift)
|
|
|
|
#define datosn(fs, daddr) /* disk address to segment number */ \
|
|
(((daddr) - (fs)->lfs_sboffs[0]) / fsbtodb((fs), (fs)->lfs_ssize))
|
|
#define sntoda(fs, sn) /* segment number to disk address */ \
|
|
((daddr_t)((sn) * ((fs)->lfs_ssize << (fs)->lfs_fsbtodb) + \
|
|
(fs)->lfs_sboffs[0]))
|
|
|
|
/* Read in the block with the cleaner info from the ifile. */
|
|
#define LFS_CLEANERINFO(CP, F, BP) { \
|
|
VTOI((F)->lfs_ivnode)->i_flag |= IN_ACCESS; \
|
|
if (bread((F)->lfs_ivnode, \
|
|
(daddr_t)0, (F)->lfs_bsize, NOCRED, &(BP))) \
|
|
panic("lfs: ifile read"); \
|
|
(CP) = (CLEANERINFO *)(BP)->b_data; \
|
|
}
|
|
|
|
/* Read in the block with a specific inode from the ifile. */
|
|
#define LFS_IENTRY(IP, F, IN, BP) { \
|
|
int _e; \
|
|
VTOI((F)->lfs_ivnode)->i_flag |= IN_ACCESS; \
|
|
if (_e = bread((F)->lfs_ivnode, \
|
|
(IN) / (F)->lfs_ifpb + (F)->lfs_cleansz + (F)->lfs_segtabsz,\
|
|
(F)->lfs_bsize, NOCRED, &(BP))) \
|
|
panic("lfs: ifile read %d", _e); \
|
|
(IP) = (IFILE *)(BP)->b_data + (IN) % (F)->lfs_ifpb; \
|
|
}
|
|
|
|
/* Read in the block with a specific segment usage entry from the ifile. */
|
|
#define LFS_SEGENTRY(SP, F, IN, BP) { \
|
|
int _e; \
|
|
VTOI((F)->lfs_ivnode)->i_flag |= IN_ACCESS; \
|
|
if (_e = bread((F)->lfs_ivnode, \
|
|
((IN) >> (F)->lfs_sushift) + (F)->lfs_cleansz, \
|
|
(F)->lfs_bsize, NOCRED, &(BP))) \
|
|
panic("lfs: ifile read: %d", _e); \
|
|
(SP) = (SEGUSE *)(BP)->b_data + ((IN) & (F)->lfs_sepb - 1); \
|
|
}
|
|
|
|
/*
|
|
* Determine if there is enough room currently available to write db
|
|
* disk blocks. We need enough blocks for the new blocks, the current,
|
|
* inode blocks, a summary block, plus potentially the ifile inode and
|
|
* the segment usage table, plus an ifile page.
|
|
*/
|
|
#define LFS_FITS(fs, db) \
|
|
((int32_t)((db + ((fs)->lfs_uinodes + INOPB((fs))) / \
|
|
INOPB((fs)) + fsbtodb(fs, 1) + LFS_SUMMARY_SIZE / DEV_BSIZE + \
|
|
(fs)->lfs_segtabsz)) < (fs)->lfs_avail)
|
|
|
|
/* Determine if a buffer belongs to the ifile */
|
|
#define IS_IFILE(bp) (VTOI(bp->b_vp)->i_number == LFS_IFILE_INUM)
|
|
|
|
/*
|
|
* Structures used by lfs_bmapv and lfs_markv to communicate information
|
|
* about inodes and data blocks.
|
|
*/
|
|
typedef struct block_info {
|
|
ino_t bi_inode; /* inode # */
|
|
daddr_t bi_lbn; /* logical block w/in file */
|
|
daddr_t bi_daddr; /* disk address of block */
|
|
time_t bi_segcreate; /* origin segment create time */
|
|
int bi_version; /* file version number */
|
|
void *bi_bp; /* data buffer */
|
|
} BLOCK_INFO;
|
|
|
|
/* In-memory description of a segment about to be written. */
|
|
struct segment {
|
|
struct lfs *fs; /* file system pointer */
|
|
struct buf **bpp; /* pointer to buffer array */
|
|
struct buf **cbpp; /* pointer to next available bp */
|
|
struct buf **start_bpp; /* pointer to first bp in this set */
|
|
struct buf *ibp; /* buffer pointer to inode page */
|
|
struct finfo *fip; /* current fileinfo pointer */
|
|
struct vnode *vp; /* vnode being gathered */
|
|
void *segsum; /* segment summary info */
|
|
u_int32_t ninodes; /* number of inodes in this segment */
|
|
u_int32_t seg_bytes_left; /* bytes left in segment */
|
|
u_int32_t sum_bytes_left; /* bytes left in summary block */
|
|
u_int32_t seg_number; /* number of this segment */
|
|
daddr_t *start_lbp; /* beginning lbn for this set */
|
|
|
|
#define SEGM_CKP 0x01 /* doing a checkpoint */
|
|
#define SEGM_CLEAN 0x02 /* cleaner call; don't sort */
|
|
#define SEGM_SYNC 0x04 /* wait for segment */
|
|
u_int16_t seg_flags; /* run-time flags for this segment */
|
|
};
|
|
|
|
#define ISSPACE(F, BB, C) \
|
|
(((C)->cr_uid == 0 && (F)->lfs_bfree >= (BB)) || \
|
|
((C)->cr_uid != 0 && IS_FREESPACE(F, BB)))
|
|
|
|
#define IS_FREESPACE(F, BB) \
|
|
((F)->lfs_bfree > ((F)->lfs_dsize * (F)->lfs_minfree / 100 + (BB)))
|
|
|
|
#define ISSPACE_XXX(F, BB) \
|
|
((F)->lfs_bfree >= (BB))
|
|
|
|
#define DOSTATS
|
|
#ifdef DOSTATS
|
|
/* Statistics Counters */
|
|
struct lfs_stats {
|
|
u_int segsused;
|
|
u_int psegwrites;
|
|
u_int psyncwrites;
|
|
u_int pcleanwrites;
|
|
u_int blocktot;
|
|
u_int cleanblocks;
|
|
u_int ncheckpoints;
|
|
u_int nwrites;
|
|
u_int nsync_writes;
|
|
u_int wait_exceeded;
|
|
u_int write_exceeded;
|
|
u_int flush_invoked;
|
|
};
|
|
extern struct lfs_stats lfs_stats;
|
|
#endif
|