lfs.h revision 1.15
1 /* $NetBSD: lfs.h,v 1.15 1999/06/01 03:00:40 perseant Exp $ */ 2 3 /*- 4 * Copyright (c) 1999 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Konrad E. Schroder <perseant (at) hhhh.org>. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 /*- 39 * Copyright (c) 1991, 1993 40 * The Regents of the University of California. All rights reserved. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. All advertising materials mentioning features or use of this software 51 * must display the following acknowledgement: 52 * This product includes software developed by the University of 53 * California, Berkeley and its contributors. 54 * 4. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 * 70 * @(#)lfs.h 8.9 (Berkeley) 5/8/95 71 */ 72 73 /* 74 * Compile-time options for LFS. 75 */ 76 #define LFS_EAGAIN_FAIL /* markv fail with EAGAIN if ino is locked */ 77 #define LFS_TRACK_IOS /* attempt to avoid cleaning segments not yet fully written to disk */ 78 #define LFS_CANNOT_ROLLFW /* No roll-forward agent exists */ 79 80 /* #define DEBUG_LFS */ /* Intensive debugging of LFS subsystem */ 81 82 /* #define LFS_ATIME_IFILE */ /* Store atime in Ifile, don't push */ 83 /* #define LFS_HONOR_RDONLY */ /* Don't write blocks if mounted ro */ 84 85 /* 86 * Parameters and generic definitions 87 */ 88 #define BW_CLEAN 1 89 #define MIN_FREE_SEGS 4 90 #define LFS_MAX_ACTIVE 10 91 92 #ifndef LFS_ATIME_IFILE 93 # define LFS_ITIMES(ip, acc, mod, cre) FFS_ITIMES((ip),(acc),(mod),(cre)) 94 #else 95 # define LFS_ITIMES(ip, acc, mod, cre) { \ 96 struct buf *ibp; \ 97 IFILE *ifp; \ 98 \ 99 if ((ip)->i_flag & IN_ACCESS) { \ 100 LFS_IENTRY(ifp, ip->i_lfs, ip->i_number, ibp); \ 101 ifp->if_atime = (mod); \ 102 VOP_BWRITE(bp); \ 103 (ip)->i_flag &= ~IN_ACCESS; \ 104 } \ 105 if ((ip)->i_flag & (IN_CHANGE | IN_UPDATE)) { \ 106 (ip)->i_flag |= IN_MODIFIED; \ 107 if ((ip)->i_flag & IN_UPDATE) { \ 108 (ip)->i_ffs_mtime = (mod)->tv_sec; \ 109 (ip)->i_ffs_mtimensec = (mod)->tv_nsec; \ 110 (ip)->i_modrev++; \ 111 } \ 112 if ((ip)->i_flag & IN_CHANGE) { \ 113 (ip)->i_ffs_ctime = (cre)->tv_sec; \ 114 (ip)->i_ffs_ctimensec = (cre)->tv_nsec; \ 115 } \ 116 (ip)->i_flag &= ~(IN_CHANGE | IN_UPDATE); \ 117 } \ 118 } 119 #endif 120 121 #define WRITEINPROG(vp) (vp->v_dirtyblkhd.lh_first && !(VTOI(vp)->i_flag & (IN_MODIFIED|IN_CLEANING))) 122 123 /* Here begins the berkeley code */ 124 125 #define LFS_LABELPAD 8192 /* LFS label size */ 126 #define LFS_SBPAD 8192 /* LFS superblock size */ 127 128 /* 129 * XXX 130 * This is a kluge and NEEDS to go away. 131 * 132 * Right now, ufs code handles most of the calls for directory operations 133 * such as create, mkdir, link, etc. As a result VOP_UPDATE is being 134 * called with waitfor set (since ffs does these things synchronously). 135 * Since LFS does not want to do these synchronously, we treat the last 136 * argument to lfs_update as a set of flags. If LFS_SYNC is set, then 137 * the update should be synchronous, if not, do it asynchronously. 138 * Unfortunately, this means that LFS won't work with NFS yet because 139 * NFS goes through paths that will make normal calls to ufs which will 140 * call lfs with a last argument of 1. 141 */ 142 #define LFS_SYNC 0x02 143 144 /* On-disk and in-memory checkpoint segment usage structure. */ 145 typedef struct segusage SEGUSE; 146 struct segusage { 147 u_int32_t su_nbytes; /* number of live bytes */ 148 u_int32_t su_lastmod; /* SEGUSE last modified timestamp */ 149 u_int16_t su_nsums; /* number of summaries in segment */ 150 u_int16_t su_ninos; /* number of inode blocks in seg */ 151 152 #define SEGUSE_ACTIVE 0x01 /* segment is currently being written */ 153 #define SEGUSE_DIRTY 0x02 /* segment has data in it */ 154 #define SEGUSE_SUPERBLOCK 0x04 /* segment contains a superblock */ 155 u_int32_t su_flags; 156 }; 157 158 #define SEGUPB(fs) (1 << (fs)->lfs_sushift) 159 #define SEGTABSIZE_SU(fs) \ 160 (((fs)->lfs_nseg + SEGUPB(fs) - 1) >> (fs)->lfs_sushift) 161 162 /* On-disk file information. One per file with data blocks in the segment. */ 163 typedef struct finfo FINFO; 164 struct finfo { 165 u_int32_t fi_nblocks; /* number of blocks */ 166 u_int32_t fi_version; /* version number */ 167 u_int32_t fi_ino; /* inode number */ 168 u_int32_t fi_lastlength; /* length of last block in array */ 169 ufs_daddr_t fi_blocks[1]; /* array of logical block numbers */ 170 }; 171 172 /* On-disk super block. */ 173 struct dlfs { 174 #define LFS_MAGIC 0x070162 175 u_int32_t dlfs_magic; /* 0: magic number */ 176 #define LFS_VERSION 1 177 u_int32_t dlfs_version; /* 4: version number */ 178 179 u_int32_t dlfs_size; /* 8: number of blocks in fs */ 180 u_int32_t dlfs_ssize; /* 12: number of blocks per segment */ 181 u_int32_t dlfs_dsize; /* 16: number of disk blocks in fs */ 182 u_int32_t dlfs_bsize; /* 20: file system block size */ 183 u_int32_t dlfs_fsize; /* 24: size of frag blocks in fs */ 184 u_int32_t dlfs_frag; /* 28: number of frags in a block in fs */ 185 186 /* Checkpoint region. */ 187 ino_t dlfs_free; /* 32: start of the free list */ 188 u_int32_t dlfs_bfree; /* 36: number of free disk blocks */ 189 u_int32_t dlfs_nfiles; /* 40: number of allocated inodes */ 190 int32_t dlfs_avail; /* 44: blocks available for writing */ 191 u_int32_t dlfs_uinodes; /* 48: inodes in cache not yet on disk */ 192 ufs_daddr_t dlfs_idaddr; /* 52: inode file disk address */ 193 ino_t dlfs_ifile; /* 56: inode file inode number */ 194 ufs_daddr_t dlfs_lastseg; /* 60: address of last segment written */ 195 ufs_daddr_t dlfs_nextseg; /* 64: address of next segment to write */ 196 ufs_daddr_t dlfs_curseg; /* 68: current segment being written */ 197 ufs_daddr_t dlfs_offset; /* 72: offset in curseg for next partial */ 198 ufs_daddr_t dlfs_lastpseg; /* 76: address of last partial written */ 199 u_int32_t dlfs_tstamp; /* 80: time stamp */ 200 201 /* These are configuration parameters. */ 202 u_int32_t dlfs_minfree; /* 84: minimum percentage of free blocks */ 203 204 /* These fields can be computed from the others. */ 205 u_int64_t dlfs_maxfilesize; /* 88: maximum representable file size */ 206 u_int32_t dlfs_dbpseg; /* 96: disk blocks per segment */ 207 u_int32_t dlfs_inopb; /* 100: inodes per block */ 208 u_int32_t dlfs_ifpb; /* 104: IFILE entries per block */ 209 u_int32_t dlfs_sepb; /* 108: SEGUSE entries per block */ 210 u_int32_t dlfs_nindir; /* 112: indirect pointers per block */ 211 u_int32_t dlfs_nseg; /* 116: number of segments */ 212 u_int32_t dlfs_nspf; /* 120: number of sectors per fragment */ 213 u_int32_t dlfs_cleansz; /* 124: cleaner info size in blocks */ 214 u_int32_t dlfs_segtabsz; /* 128: segment table size in blocks */ 215 u_int32_t dlfs_segmask; /* 132: calculate offset within a segment */ 216 u_int32_t dlfs_segshift; /* 136: fast mult/div for segments */ 217 u_int32_t dlfs_bshift; /* 140: calc block number from file offset */ 218 u_int32_t dlfs_ffshift; /* 144: fast mult/div for frag from file */ 219 u_int32_t dlfs_fbshift; /* 148: fast mult/div for frag from block */ 220 u_int64_t dlfs_bmask; /* 152: calc block offset from file offset */ 221 u_int64_t dlfs_ffmask; /* 160: calc frag offset from file offset */ 222 u_int64_t dlfs_fbmask; /* 168: calc frag offset from block offset */ 223 u_int32_t dlfs_fsbtodb; /* 176: fsbtodb and dbtofsb shift constant */ 224 u_int32_t dlfs_sushift; /* 180: fast mult/div for segusage table */ 225 226 int32_t dlfs_maxsymlinklen; /* 184: max length of an internal symlink */ 227 228 #define LFS_MIN_SBINTERVAL 5 /* minimum superblock segment spacing */ 229 #define LFS_MAXNUMSB 10 /* 188: superblock disk offsets */ 230 ufs_daddr_t dlfs_sboffs[LFS_MAXNUMSB]; 231 232 u_int32_t dlfs_nclean; /* 228: Number of clean segments */ 233 u_char dlfs_fsmnt[MNAMELEN]; /* 232: name mounted on */ 234 /* XXX this is 2 bytes only to pad to a quad boundary */ 235 u_int16_t dlfs_clean; /* 322: file system is clean flag */ 236 int8_t dlfs_pad[184]; /* 324: round to 512 bytes */ 237 /* Checksum -- last valid disk field. */ 238 u_int32_t dlfs_cksum; /* 328: checksum for superblock checking */ 239 }; 240 241 /* Maximum number of io's we can have pending at once */ 242 #define LFS_THROTTLE 16 /* XXX should be better paramtrized - ? */ 243 244 /* In-memory super block. */ 245 struct lfs { 246 struct dlfs lfs_dlfs; /* on-disk parameters */ 247 #define lfs_magic lfs_dlfs.dlfs_magic 248 #define lfs_version lfs_dlfs.dlfs_version 249 #define lfs_size lfs_dlfs.dlfs_size 250 #define lfs_ssize lfs_dlfs.dlfs_ssize 251 #define lfs_dsize lfs_dlfs.dlfs_dsize 252 #define lfs_bsize lfs_dlfs.dlfs_bsize 253 #define lfs_fsize lfs_dlfs.dlfs_fsize 254 #define lfs_frag lfs_dlfs.dlfs_frag 255 #define lfs_free lfs_dlfs.dlfs_free 256 #define lfs_bfree lfs_dlfs.dlfs_bfree 257 #define lfs_nfiles lfs_dlfs.dlfs_nfiles 258 #define lfs_avail lfs_dlfs.dlfs_avail 259 #define lfs_uinodes lfs_dlfs.dlfs_uinodes 260 #define lfs_idaddr lfs_dlfs.dlfs_idaddr 261 #define lfs_ifile lfs_dlfs.dlfs_ifile 262 #define lfs_lastseg lfs_dlfs.dlfs_lastseg 263 #define lfs_nextseg lfs_dlfs.dlfs_nextseg 264 #define lfs_curseg lfs_dlfs.dlfs_curseg 265 #define lfs_offset lfs_dlfs.dlfs_offset 266 #define lfs_lastpseg lfs_dlfs.dlfs_lastpseg 267 #define lfs_tstamp lfs_dlfs.dlfs_tstamp 268 #define lfs_minfree lfs_dlfs.dlfs_minfree 269 #define lfs_maxfilesize lfs_dlfs.dlfs_maxfilesize 270 #define lfs_dbpseg lfs_dlfs.dlfs_dbpseg 271 #define lfs_inopb lfs_dlfs.dlfs_inopb 272 #define lfs_ifpb lfs_dlfs.dlfs_ifpb 273 #define lfs_sepb lfs_dlfs.dlfs_sepb 274 #define lfs_nindir lfs_dlfs.dlfs_nindir 275 #define lfs_nseg lfs_dlfs.dlfs_nseg 276 #define lfs_nspf lfs_dlfs.dlfs_nspf 277 #define lfs_cleansz lfs_dlfs.dlfs_cleansz 278 #define lfs_segtabsz lfs_dlfs.dlfs_segtabsz 279 #define lfs_segmask lfs_dlfs.dlfs_segmask 280 #define lfs_segshift lfs_dlfs.dlfs_segshift 281 #define lfs_bmask lfs_dlfs.dlfs_bmask 282 #define lfs_bshift lfs_dlfs.dlfs_bshift 283 #define lfs_ffmask lfs_dlfs.dlfs_ffmask 284 #define lfs_ffshift lfs_dlfs.dlfs_ffshift 285 #define lfs_fbmask lfs_dlfs.dlfs_fbmask 286 #define lfs_fbshift lfs_dlfs.dlfs_fbshift 287 #define lfs_fsbtodb lfs_dlfs.dlfs_fsbtodb 288 #define lfs_sushift lfs_dlfs.dlfs_sushift 289 #define lfs_maxsymlinklen lfs_dlfs.dlfs_maxsymlinklen 290 #define lfs_sboffs lfs_dlfs.dlfs_sboffs 291 #define lfs_cksum lfs_dlfs.dlfs_cksum 292 #define lfs_clean lfs_dlfs.dlfs_clean 293 #define lfs_fsmnt lfs_dlfs.dlfs_fsmnt 294 #define lfs_nclean lfs_dlfs.dlfs_nclean 295 /* These fields are set at mount time and are meaningless on disk. */ 296 struct segment *lfs_sp; /* current segment being written */ 297 struct vnode *lfs_ivnode; /* vnode for the ifile */ 298 u_int32_t lfs_seglock; /* single-thread the segment writer */ 299 pid_t lfs_lockpid; /* pid of lock holder */ 300 u_int32_t lfs_iocount; /* number of ios pending */ 301 u_int32_t lfs_writer; /* don't allow any dirops to start */ 302 u_int32_t lfs_dirops; /* count of active directory ops */ 303 u_int32_t lfs_doifile; /* Write ifile blocks on next write */ 304 u_int32_t lfs_nactive; /* Number of segments since last ckp */ 305 int8_t lfs_fmod; /* super block modified flag */ 306 int8_t lfs_ronly; /* mounted read-only flag */ 307 int8_t lfs_flags; /* currently unused flag */ 308 u_int16_t lfs_activesb; /* toggle between superblocks */ 309 #ifdef LFS_TRACK_IOS 310 daddr_t lfs_pending[LFS_THROTTLE]; /* daddrs of pending writes */ 311 #endif /* LFS_TRACK_IOS */ 312 # define LFS_MAXDIROP 32 313 int lfs_dirvcount; /* number of VDIROP-marked vnodes */ 314 #ifdef LFS_CANNOT_ROLLFW 315 daddr_t lfs_sbactive; /* disk address of in-progress sb write */ 316 #endif 317 struct vnode *lfs_flushvp; /* vnode being flushed */ 318 u_int32_t lfs_diropwait; /* # procs waiting on dirop flush */ 319 }; 320 321 /* 322 * Inode 0: out-of-band inode number 323 * Inode 1: IFILE inode number 324 * Inode 2: root inode 325 * Inode 3: lost+found inode number 326 */ 327 #define LFS_UNUSED_INUM 0 /* out of band inode number */ 328 #define LFS_IFILE_INUM 1 /* IFILE inode number */ 329 #define LOSTFOUNDINO 3 /* lost+found inode number */ 330 #define LFS_FIRST_INUM 4 /* first free inode number */ 331 332 /* Address calculations for metadata located in the inode */ 333 #define S_INDIR(fs) -NDADDR 334 #define D_INDIR(fs) (S_INDIR(fs) - NINDIR(fs) - 1) 335 #define T_INDIR(fs) (D_INDIR(fs) - NINDIR(fs) * NINDIR(fs) - 1) 336 337 /* Unassigned disk address. */ 338 #define UNASSIGNED -1 339 340 /* Unused logical block number */ 341 #define LFS_UNUSED_LBN -1 342 343 typedef struct ifile IFILE; 344 struct ifile { 345 u_int32_t if_version; /* inode version number */ 346 #define LFS_UNUSED_DADDR 0 /* out-of-band daddr */ 347 ufs_daddr_t if_daddr; /* inode disk address */ 348 ino_t if_nextfree; /* next-unallocated inode */ 349 #ifdef LFS_ATIME_IFILE 350 struct timespec if_atime; /* Last access time */ 351 #endif 352 }; 353 354 /* 355 * Cleaner information structure. This resides in the ifile and is used 356 * to pass information between the cleaner and the kernel. 357 */ 358 typedef struct _cleanerinfo { 359 u_int32_t clean; /* K: number of clean segments */ 360 u_int32_t dirty; /* K: number of dirty segments */ 361 } CLEANERINFO; 362 363 #define CLEANSIZE_SU(fs) \ 364 ((sizeof(CLEANERINFO) + (fs)->lfs_bsize - 1) >> (fs)->lfs_bshift) 365 366 /* 367 * All summary blocks are the same size, so we can always read a summary 368 * block easily from a segment. 369 */ 370 #define LFS_SUMMARY_SIZE 512 371 372 /* On-disk segment summary information */ 373 typedef struct segsum SEGSUM; 374 struct segsum { 375 u_int32_t ss_sumsum; /* check sum of summary block */ 376 u_int32_t ss_datasum; /* check sum of data */ 377 u_int32_t ss_magic; /* segment summary magic number */ 378 #define SS_MAGIC 0x061561 379 ufs_daddr_t ss_next; /* next segment */ 380 u_int32_t ss_create; /* creation time stamp */ 381 u_int16_t ss_nfinfo; /* number of file info structures */ 382 u_int16_t ss_ninos; /* number of inodes in summary */ 383 384 #define SS_DIROP 0x01 /* segment begins a dirop */ 385 #define SS_CONT 0x02 /* more partials to finish this write*/ 386 u_int16_t ss_flags; /* used for directory operations */ 387 u_int16_t ss_pad; /* extra space */ 388 /* FINFO's and inode daddr's... */ 389 }; 390 391 /* NINDIR is the number of indirects in a file system block. */ 392 #define NINDIR(fs) ((fs)->lfs_nindir) 393 394 /* INOPB is the number of inodes in a secondary storage block. */ 395 #define INOPB(fs) ((fs)->lfs_inopb) 396 397 #define blksize(fs, ip, lbn) \ 398 (((lbn) >= NDADDR || (ip)->i_ffs_size >= ((lbn) + 1) << (fs)->lfs_bshift) \ 399 ? (fs)->lfs_bsize \ 400 : (fragroundup(fs, blkoff(fs, (ip)->i_ffs_size)))) 401 #define blkoff(fs, loc) ((int)(loc) & (fs)->lfs_bmask) 402 #define fragoff(fs, loc) /* calculates (loc % fs->lfs_fsize) */ \ 403 ((int)((loc) & (fs)->lfs_ffmask)) 404 #define fsbtodb(fs, b) ((b) << (fs)->lfs_fsbtodb) 405 #define dbtofsb(fs, b) ((b) >> (fs)->lfs_fsbtodb) 406 #define fragstodb(fs, b) ((b) << ((fs)->lfs_fsbtodb - (fs)->lfs_fbshift)) 407 #define dbtofrags(fs, b) ((b) >> ((fs)->lfs_fsbtodb - (fs)->lfs_fbshift)) 408 #define lblkno(fs, loc) ((loc) >> (fs)->lfs_bshift) 409 #define lblktosize(fs, blk) ((blk) << (fs)->lfs_bshift) 410 #define numfrags(fs, loc) /* calculates (loc / fs->lfs_fsize) */ \ 411 ((loc) >> (fs)->lfs_ffshift) 412 #define blkroundup(fs, size) /* calculates roundup(size, fs->lfs_bsize) */ \ 413 ((int)(((size) + (fs)->lfs_bmask) & (~(fs)->lfs_bmask))) 414 #define fragroundup(fs, size) /* calculates roundup(size, fs->lfs_fsize) */ \ 415 ((int)(((size) + (fs)->lfs_ffmask) & (~(fs)->lfs_ffmask))) 416 #define fragstoblks(fs, frags) /* calculates (frags / fs->lfs_frag) */ \ 417 ((frags) >> (fs)->lfs_fbshift) 418 #define blkstofrags(fs, blks) /* calculates (blks * fs->lfs_frag) */ \ 419 ((blks) << (fs)->lfs_fbshift) 420 #define fragnum(fs, fsb) /* calculates (fsb % fs->lfs_frag) */ \ 421 ((fsb) & ((fs)->lfs_frag - 1)) 422 #define blknum(fs, fsb) /* calculates rounddown(fsb, fs->lfs_frag) */ \ 423 ((fsb) &~ ((fs)->lfs_frag - 1)) 424 #define dblksize(fs, dip, lbn) \ 425 (((lbn) >= NDADDR || (dip)->di_size >= ((lbn) + 1) << (fs)->lfs_bshift)\ 426 ? (fs)->lfs_bsize \ 427 : (fragroundup(fs, blkoff(fs, (dip)->di_size)))) 428 #define datosn(fs, daddr) /* disk address to segment number */ \ 429 (((daddr) - (fs)->lfs_sboffs[0]) / fsbtodb((fs), (fs)->lfs_ssize)) 430 #define sntoda(fs, sn) /* segment number to disk address */ \ 431 ((ufs_daddr_t)((sn) * ((fs)->lfs_ssize << (fs)->lfs_fsbtodb) + \ 432 (fs)->lfs_sboffs[0])) 433 434 /* Read in the block with the cleaner info from the ifile. */ 435 #define LFS_CLEANERINFO(CP, F, BP) { \ 436 VTOI((F)->lfs_ivnode)->i_flag |= IN_ACCESS; \ 437 if (bread((F)->lfs_ivnode, \ 438 (ufs_daddr_t)0, (F)->lfs_bsize, NOCRED, &(BP))) \ 439 panic("lfs: ifile read"); \ 440 (CP) = (CLEANERINFO *)(BP)->b_data; \ 441 } 442 443 /* Read in the block with a specific inode from the ifile. */ 444 #define LFS_IENTRY(IP, F, IN, BP) { \ 445 int _e; \ 446 VTOI((F)->lfs_ivnode)->i_flag |= IN_ACCESS; \ 447 if ((_e = bread((F)->lfs_ivnode, \ 448 (IN) / (F)->lfs_ifpb + (F)->lfs_cleansz + (F)->lfs_segtabsz,\ 449 (F)->lfs_bsize, NOCRED, &(BP))) != 0) \ 450 panic("lfs: ifile read %d", _e); \ 451 (IP) = (IFILE *)(BP)->b_data + (IN) % (F)->lfs_ifpb; \ 452 } 453 454 /* Read in the block with a specific segment usage entry from the ifile. */ 455 #define LFS_SEGENTRY(SP, F, IN, BP) { \ 456 int _e; \ 457 VTOI((F)->lfs_ivnode)->i_flag |= IN_ACCESS; \ 458 if ((_e = bread((F)->lfs_ivnode, \ 459 ((IN) >> (F)->lfs_sushift) + (F)->lfs_cleansz, \ 460 (F)->lfs_bsize, NOCRED, &(BP))) != 0) \ 461 panic("lfs: ifile read: %d", _e); \ 462 (SP) = (SEGUSE *)(BP)->b_data + ((IN) & ((F)->lfs_sepb - 1)); \ 463 } 464 465 /* Determine if a buffer belongs to the ifile */ 466 #define IS_IFILE(bp) (VTOI(bp->b_vp)->i_number == LFS_IFILE_INUM) 467 468 /* 469 * Structures used by lfs_bmapv and lfs_markv to communicate information 470 * about inodes and data blocks. 471 */ 472 typedef struct block_info { 473 ino_t bi_inode; /* inode # */ 474 ufs_daddr_t bi_lbn; /* logical block w/in file */ 475 ufs_daddr_t bi_daddr; /* disk address of block */ 476 time_t bi_segcreate; /* origin segment create time */ 477 int bi_version; /* file version number */ 478 void *bi_bp; /* data buffer */ 479 int bi_size; /* size of the block (if fragment) */ 480 } BLOCK_INFO; 481 482 /* In-memory description of a segment about to be written. */ 483 struct segment { 484 struct lfs *fs; /* file system pointer */ 485 struct buf **bpp; /* pointer to buffer array */ 486 struct buf **cbpp; /* pointer to next available bp */ 487 struct buf **start_bpp; /* pointer to first bp in this set */ 488 struct buf *ibp; /* buffer pointer to inode page */ 489 struct finfo *fip; /* current fileinfo pointer */ 490 struct vnode *vp; /* vnode being gathered */ 491 void *segsum; /* segment summary info */ 492 u_int32_t ninodes; /* number of inodes in this segment */ 493 u_int32_t seg_bytes_left; /* bytes left in segment */ 494 u_int32_t sum_bytes_left; /* bytes left in summary block */ 495 u_int32_t seg_number; /* number of this segment */ 496 ufs_daddr_t *start_lbp; /* beginning lbn for this set */ 497 498 #define SEGM_CKP 0x01 /* doing a checkpoint */ 499 #define SEGM_CLEAN 0x02 /* cleaner call; don't sort */ 500 #define SEGM_SYNC 0x04 /* wait for segment */ 501 u_int16_t seg_flags; /* run-time flags for this segment */ 502 }; 503 504 #define ISSPACE(F, BB, C) \ 505 (((C)->cr_uid == 0 && (F)->lfs_bfree >= (BB)) || \ 506 ((C)->cr_uid != 0 && IS_FREESPACE(F, BB))) 507 508 #define IS_FREESPACE(F, BB) \ 509 ((F)->lfs_bfree > ((F)->lfs_dsize * (F)->lfs_minfree / 100 + (BB))) 510 511 #define ISSPACE_XXX(F, BB) \ 512 ((F)->lfs_bfree >= (BB)) 513 514 /* Statistics Counters */ 515 struct lfs_stats { 516 u_int segsused; 517 u_int psegwrites; 518 u_int psyncwrites; 519 u_int pcleanwrites; 520 u_int blocktot; 521 u_int cleanblocks; 522 u_int ncheckpoints; 523 u_int nwrites; 524 u_int nsync_writes; 525 u_int wait_exceeded; 526 u_int write_exceeded; 527 u_int flush_invoked; 528 u_int vflush_invoked; 529 }; 530 extern struct lfs_stats lfs_stats; 531
Indexes created Tue Sep 30 07:10:03 GMT 2025