/* $NetBSD: lfs.h,v 1.15 1999/06/01 03:00:40 perseant Exp $ */ /*- * Copyright (c) 1999 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Konrad E. Schroder . * * 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 NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ /*- * 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 8.9 (Berkeley) 5/8/95 */ /* * Compile-time options for LFS. */ #define LFS_EAGAIN_FAIL /* markv fail with EAGAIN if ino is locked */ #define LFS_TRACK_IOS /* attempt to avoid cleaning segments not yet fully written to disk */ #define LFS_CANNOT_ROLLFW /* No roll-forward agent exists */ /* #define DEBUG_LFS */ /* Intensive debugging of LFS subsystem */ /* #define LFS_ATIME_IFILE */ /* Store atime in Ifile, don't push */ /* #define LFS_HONOR_RDONLY */ /* Don't write blocks if mounted ro */ /* * Parameters and generic definitions */ #define BW_CLEAN 1 #define MIN_FREE_SEGS 4 #define LFS_MAX_ACTIVE 10 #ifndef LFS_ATIME_IFILE # define LFS_ITIMES(ip, acc, mod, cre) FFS_ITIMES((ip),(acc),(mod),(cre)) #else # define LFS_ITIMES(ip, acc, mod, cre) { \ struct buf *ibp; \ IFILE *ifp; \ \ if ((ip)->i_flag & IN_ACCESS) { \ LFS_IENTRY(ifp, ip->i_lfs, ip->i_number, ibp); \ ifp->if_atime = (mod); \ VOP_BWRITE(bp); \ (ip)->i_flag &= ~IN_ACCESS; \ } \ if ((ip)->i_flag & (IN_CHANGE | IN_UPDATE)) { \ (ip)->i_flag |= IN_MODIFIED; \ if ((ip)->i_flag & IN_UPDATE) { \ (ip)->i_ffs_mtime = (mod)->tv_sec; \ (ip)->i_ffs_mtimensec = (mod)->tv_nsec; \ (ip)->i_modrev++; \ } \ if ((ip)->i_flag & IN_CHANGE) { \ (ip)->i_ffs_ctime = (cre)->tv_sec; \ (ip)->i_ffs_ctimensec = (cre)->tv_nsec; \ } \ (ip)->i_flag &= ~(IN_CHANGE | IN_UPDATE); \ } \ } #endif #define WRITEINPROG(vp) (vp->v_dirtyblkhd.lh_first && !(VTOI(vp)->i_flag & (IN_MODIFIED|IN_CLEANING))) /* Here begins the berkeley code */ #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 */ u_int32_t fi_lastlength; /* length of last block in array */ ufs_daddr_t fi_blocks[1]; /* array of logical block numbers */ }; /* On-disk super block. */ struct dlfs { #define LFS_MAGIC 0x070162 u_int32_t dlfs_magic; /* 0: magic number */ #define LFS_VERSION 1 u_int32_t dlfs_version; /* 4: version number */ u_int32_t dlfs_size; /* 8: number of blocks in fs */ u_int32_t dlfs_ssize; /* 12: number of blocks per segment */ u_int32_t dlfs_dsize; /* 16: number of disk blocks in fs */ u_int32_t dlfs_bsize; /* 20: file system block size */ u_int32_t dlfs_fsize; /* 24: size of frag blocks in fs */ u_int32_t dlfs_frag; /* 28: number of frags in a block in fs */ /* Checkpoint region. */ ino_t dlfs_free; /* 32: start of the free list */ u_int32_t dlfs_bfree; /* 36: number of free disk blocks */ u_int32_t dlfs_nfiles; /* 40: number of allocated inodes */ int32_t dlfs_avail; /* 44: blocks available for writing */ u_int32_t dlfs_uinodes; /* 48: inodes in cache not yet on disk */ ufs_daddr_t dlfs_idaddr; /* 52: inode file disk address */ ino_t dlfs_ifile; /* 56: inode file inode number */ ufs_daddr_t dlfs_lastseg; /* 60: address of last segment written */ ufs_daddr_t dlfs_nextseg; /* 64: address of next segment to write */ ufs_daddr_t dlfs_curseg; /* 68: current segment being written */ ufs_daddr_t dlfs_offset; /* 72: offset in curseg for next partial */ ufs_daddr_t dlfs_lastpseg; /* 76: address of last partial written */ u_int32_t dlfs_tstamp; /* 80: time stamp */ /* These are configuration parameters. */ u_int32_t dlfs_minfree; /* 84: minimum percentage of free blocks */ /* These fields can be computed from the others. */ u_int64_t dlfs_maxfilesize; /* 88: maximum representable file size */ u_int32_t dlfs_dbpseg; /* 96: disk blocks per segment */ u_int32_t dlfs_inopb; /* 100: inodes per block */ u_int32_t dlfs_ifpb; /* 104: IFILE entries per block */ u_int32_t dlfs_sepb; /* 108: SEGUSE entries per block */ u_int32_t dlfs_nindir; /* 112: indirect pointers per block */ u_int32_t dlfs_nseg; /* 116: number of segments */ u_int32_t dlfs_nspf; /* 120: number of sectors per fragment */ u_int32_t dlfs_cleansz; /* 124: cleaner info size in blocks */ u_int32_t dlfs_segtabsz; /* 128: segment table size in blocks */ u_int32_t dlfs_segmask; /* 132: calculate offset within a segment */ u_int32_t dlfs_segshift; /* 136: fast mult/div for segments */ u_int32_t dlfs_bshift; /* 140: calc block number from file offset */ u_int32_t dlfs_ffshift; /* 144: fast mult/div for frag from file */ u_int32_t dlfs_fbshift; /* 148: fast mult/div for frag from block */ u_int64_t dlfs_bmask; /* 152: calc block offset from file offset */ u_int64_t dlfs_ffmask; /* 160: calc frag offset from file offset */ u_int64_t dlfs_fbmask; /* 168: calc frag offset from block offset */ u_int32_t dlfs_fsbtodb; /* 176: fsbtodb and dbtofsb shift constant */ u_int32_t dlfs_sushift; /* 180: fast mult/div for segusage table */ int32_t dlfs_maxsymlinklen; /* 184: max length of an internal symlink */ #define LFS_MIN_SBINTERVAL 5 /* minimum superblock segment spacing */ #define LFS_MAXNUMSB 10 /* 188: superblock disk offsets */ ufs_daddr_t dlfs_sboffs[LFS_MAXNUMSB]; u_int32_t dlfs_nclean; /* 228: Number of clean segments */ u_char dlfs_fsmnt[MNAMELEN]; /* 232: name mounted on */ /* XXX this is 2 bytes only to pad to a quad boundary */ u_int16_t dlfs_clean; /* 322: file system is clean flag */ int8_t dlfs_pad[184]; /* 324: round to 512 bytes */ /* Checksum -- last valid disk field. */ u_int32_t dlfs_cksum; /* 328: checksum for superblock checking */ }; /* Maximum number of io's we can have pending at once */ #define LFS_THROTTLE 16 /* XXX should be better paramtrized - ? */ /* In-memory super block. */ struct lfs { struct dlfs lfs_dlfs; /* on-disk parameters */ #define lfs_magic lfs_dlfs.dlfs_magic #define lfs_version lfs_dlfs.dlfs_version #define lfs_size lfs_dlfs.dlfs_size #define lfs_ssize lfs_dlfs.dlfs_ssize #define lfs_dsize lfs_dlfs.dlfs_dsize #define lfs_bsize lfs_dlfs.dlfs_bsize #define lfs_fsize lfs_dlfs.dlfs_fsize #define lfs_frag lfs_dlfs.dlfs_frag #define lfs_free lfs_dlfs.dlfs_free #define lfs_bfree lfs_dlfs.dlfs_bfree #define lfs_nfiles lfs_dlfs.dlfs_nfiles #define lfs_avail lfs_dlfs.dlfs_avail #define lfs_uinodes lfs_dlfs.dlfs_uinodes #define lfs_idaddr lfs_dlfs.dlfs_idaddr #define lfs_ifile lfs_dlfs.dlfs_ifile #define lfs_lastseg lfs_dlfs.dlfs_lastseg #define lfs_nextseg lfs_dlfs.dlfs_nextseg #define lfs_curseg lfs_dlfs.dlfs_curseg #define lfs_offset lfs_dlfs.dlfs_offset #define lfs_lastpseg lfs_dlfs.dlfs_lastpseg #define lfs_tstamp lfs_dlfs.dlfs_tstamp #define lfs_minfree lfs_dlfs.dlfs_minfree #define lfs_maxfilesize lfs_dlfs.dlfs_maxfilesize #define lfs_dbpseg lfs_dlfs.dlfs_dbpseg #define lfs_inopb lfs_dlfs.dlfs_inopb #define lfs_ifpb lfs_dlfs.dlfs_ifpb #define lfs_sepb lfs_dlfs.dlfs_sepb #define lfs_nindir lfs_dlfs.dlfs_nindir #define lfs_nseg lfs_dlfs.dlfs_nseg #define lfs_nspf lfs_dlfs.dlfs_nspf #define lfs_cleansz lfs_dlfs.dlfs_cleansz #define lfs_segtabsz lfs_dlfs.dlfs_segtabsz #define lfs_segmask lfs_dlfs.dlfs_segmask #define lfs_segshift lfs_dlfs.dlfs_segshift #define lfs_bmask lfs_dlfs.dlfs_bmask #define lfs_bshift lfs_dlfs.dlfs_bshift #define lfs_ffmask lfs_dlfs.dlfs_ffmask #define lfs_ffshift lfs_dlfs.dlfs_ffshift #define lfs_fbmask lfs_dlfs.dlfs_fbmask #define lfs_fbshift lfs_dlfs.dlfs_fbshift #define lfs_fsbtodb lfs_dlfs.dlfs_fsbtodb #define lfs_sushift lfs_dlfs.dlfs_sushift #define lfs_maxsymlinklen lfs_dlfs.dlfs_maxsymlinklen #define lfs_sboffs lfs_dlfs.dlfs_sboffs #define lfs_cksum lfs_dlfs.dlfs_cksum #define lfs_clean lfs_dlfs.dlfs_clean #define lfs_fsmnt lfs_dlfs.dlfs_fsmnt #define lfs_nclean lfs_dlfs.dlfs_nclean /* 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_int32_t lfs_seglock; /* single-thread the segment writer */ pid_t lfs_lockpid; /* pid of lock holder */ u_int32_t lfs_iocount; /* number of ios pending */ u_int32_t lfs_writer; /* don't allow any dirops to start */ u_int32_t lfs_dirops; /* count of active directory ops */ u_int32_t lfs_doifile; /* Write ifile blocks on next write */ u_int32_t lfs_nactive; /* Number of segments since last ckp */ int8_t lfs_fmod; /* super block modified flag */ int8_t lfs_ronly; /* mounted read-only flag */ int8_t lfs_flags; /* currently unused flag */ u_int16_t lfs_activesb; /* toggle between superblocks */ #ifdef LFS_TRACK_IOS daddr_t lfs_pending[LFS_THROTTLE]; /* daddrs of pending writes */ #endif /* LFS_TRACK_IOS */ # define LFS_MAXDIROP 32 int lfs_dirvcount; /* number of VDIROP-marked vnodes */ #ifdef LFS_CANNOT_ROLLFW daddr_t lfs_sbactive; /* disk address of in-progress sb write */ #endif struct vnode *lfs_flushvp; /* vnode being flushed */ u_int32_t lfs_diropwait; /* # procs waiting on dirop flush */ }; /* * 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 */ ufs_daddr_t if_daddr; /* inode disk address */ ino_t if_nextfree; /* next-unallocated inode */ #ifdef LFS_ATIME_IFILE struct timespec if_atime; /* Last access time */ #endif }; /* * 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 */ u_int32_t ss_magic; /* segment summary magic number */ #define SS_MAGIC 0x061561 ufs_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, ip, lbn) \ (((lbn) >= NDADDR || (ip)->i_ffs_size >= ((lbn) + 1) << (fs)->lfs_bshift) \ ? (fs)->lfs_bsize \ : (fragroundup(fs, blkoff(fs, (ip)->i_ffs_size)))) #define blkoff(fs, loc) ((int)(loc) & (fs)->lfs_bmask) #define fragoff(fs, loc) /* calculates (loc % fs->lfs_fsize) */ \ ((int)((loc) & (fs)->lfs_ffmask)) #define fsbtodb(fs, b) ((b) << (fs)->lfs_fsbtodb) #define dbtofsb(fs, b) ((b) >> (fs)->lfs_fsbtodb) #define fragstodb(fs, b) ((b) << ((fs)->lfs_fsbtodb - (fs)->lfs_fbshift)) #define dbtofrags(fs, b) ((b) >> ((fs)->lfs_fsbtodb - (fs)->lfs_fbshift)) #define lblkno(fs, loc) ((loc) >> (fs)->lfs_bshift) #define lblktosize(fs, blk) ((blk) << (fs)->lfs_bshift) #define numfrags(fs, loc) /* calculates (loc / fs->lfs_fsize) */ \ ((loc) >> (fs)->lfs_ffshift) #define blkroundup(fs, size) /* calculates roundup(size, fs->lfs_bsize) */ \ ((int)(((size) + (fs)->lfs_bmask) & (~(fs)->lfs_bmask))) #define fragroundup(fs, size) /* calculates roundup(size, fs->lfs_fsize) */ \ ((int)(((size) + (fs)->lfs_ffmask) & (~(fs)->lfs_ffmask))) #define fragstoblks(fs, frags) /* calculates (frags / fs->lfs_frag) */ \ ((frags) >> (fs)->lfs_fbshift) #define blkstofrags(fs, blks) /* calculates (blks * fs->lfs_frag) */ \ ((blks) << (fs)->lfs_fbshift) #define fragnum(fs, fsb) /* calculates (fsb % fs->lfs_frag) */ \ ((fsb) & ((fs)->lfs_frag - 1)) #define blknum(fs, fsb) /* calculates rounddown(fsb, fs->lfs_frag) */ \ ((fsb) &~ ((fs)->lfs_frag - 1)) #define dblksize(fs, dip, lbn) \ (((lbn) >= NDADDR || (dip)->di_size >= ((lbn) + 1) << (fs)->lfs_bshift)\ ? (fs)->lfs_bsize \ : (fragroundup(fs, blkoff(fs, (dip)->di_size)))) #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 */ \ ((ufs_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, \ (ufs_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))) != 0) \ 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))) != 0) \ panic("lfs: ifile read: %d", _e); \ (SP) = (SEGUSE *)(BP)->b_data + ((IN) & ((F)->lfs_sepb - 1)); \ } /* 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 # */ ufs_daddr_t bi_lbn; /* logical block w/in file */ ufs_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 */ int bi_size; /* size of the block (if fragment) */ } 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 */ ufs_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)) /* 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; u_int vflush_invoked; }; extern struct lfs_stats lfs_stats;