1 /* $NetBSD: lfs.h,v 1.194 2015/10/03 08:29:34 dholland Exp $ */ 2 3 /* from NetBSD: dinode.h,v 1.22 2013/01/22 09:39:18 dholland Exp */ 4 /* from NetBSD: dir.h,v 1.21 2009/07/22 04:49:19 dholland Exp */ 5 6 /*- 7 * Copyright (c) 1999, 2000, 2001, 2002, 2003 The NetBSD Foundation, Inc. 8 * All rights reserved. 9 * 10 * This code is derived from software contributed to The NetBSD Foundation 11 * by Konrad E. Schroder <perseant@hhhh.org>. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 23 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 24 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 25 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 26 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 32 * POSSIBILITY OF SUCH DAMAGE. 33 */ 34 /*- 35 * Copyright (c) 1991, 1993 36 * The Regents of the University of California. All rights reserved. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 3. Neither the name of the University nor the names of its contributors 47 * may be used to endorse or promote products derived from this software 48 * without specific prior written permission. 49 * 50 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 53 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 56 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 60 * SUCH DAMAGE. 61 * 62 * @(#)lfs.h 8.9 (Berkeley) 5/8/95 63 */ 64 /* 65 * Copyright (c) 2002 Networks Associates Technology, Inc. 66 * All rights reserved. 67 * 68 * This software was developed for the FreeBSD Project by Marshall 69 * Kirk McKusick and Network Associates Laboratories, the Security 70 * Research Division of Network Associates, Inc. under DARPA/SPAWAR 71 * contract N66001-01-C-8035 ("CBOSS"), as part of the DARPA CHATS 72 * research program 73 * 74 * Copyright (c) 1982, 1989, 1993 75 * The Regents of the University of California. All rights reserved. 76 * (c) UNIX System Laboratories, Inc. 77 * All or some portions of this file are derived from material licensed 78 * to the University of California by American Telephone and Telegraph 79 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 80 * the permission of UNIX System Laboratories, Inc. 81 * 82 * Redistribution and use in source and binary forms, with or without 83 * modification, are permitted provided that the following conditions 84 * are met: 85 * 1. Redistributions of source code must retain the above copyright 86 * notice, this list of conditions and the following disclaimer. 87 * 2. Redistributions in binary form must reproduce the above copyright 88 * notice, this list of conditions and the following disclaimer in the 89 * documentation and/or other materials provided with the distribution. 90 * 3. Neither the name of the University nor the names of its contributors 91 * may be used to endorse or promote products derived from this software 92 * without specific prior written permission. 93 * 94 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 95 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 96 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 97 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 98 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 99 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 100 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 101 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 102 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 103 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 104 * SUCH DAMAGE. 105 * 106 * @(#)dinode.h 8.9 (Berkeley) 3/29/95 107 */ 108 /* 109 * Copyright (c) 1982, 1986, 1989, 1993 110 * The Regents of the University of California. All rights reserved. 111 * (c) UNIX System Laboratories, Inc. 112 * All or some portions of this file are derived from material licensed 113 * to the University of California by American Telephone and Telegraph 114 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 115 * the permission of UNIX System Laboratories, Inc. 116 * 117 * Redistribution and use in source and binary forms, with or without 118 * modification, are permitted provided that the following conditions 119 * are met: 120 * 1. Redistributions of source code must retain the above copyright 121 * notice, this list of conditions and the following disclaimer. 122 * 2. Redistributions in binary form must reproduce the above copyright 123 * notice, this list of conditions and the following disclaimer in the 124 * documentation and/or other materials provided with the distribution. 125 * 3. Neither the name of the University nor the names of its contributors 126 * may be used to endorse or promote products derived from this software 127 * without specific prior written permission. 128 * 129 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 130 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 131 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 132 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 133 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 134 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 135 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 136 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 137 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 138 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 139 * SUCH DAMAGE. 140 * 141 * @(#)dir.h 8.5 (Berkeley) 4/27/95 142 */ 143 144 /* 145 * NOTE: COORDINATE ON-DISK FORMAT CHANGES WITH THE FREEBSD PROJECT. 146 */ 147 148 #ifndef _UFS_LFS_LFS_H_ 149 #define _UFS_LFS_LFS_H_ 150 151 #if !defined(_KERNEL) && !defined(_STANDALONE) 152 #include <stddef.h> /* for offsetof */ 153 #endif 154 155 #include <sys/rwlock.h> 156 #include <sys/mutex.h> 157 #include <sys/queue.h> 158 #include <sys/condvar.h> 159 #include <sys/mount.h> 160 #include <sys/pool.h> 161 162 /* 163 * Compile-time options for LFS. 164 */ 165 #define LFS_IFIND_RETRIES 16 166 #define LFS_LOGLENGTH 1024 /* size of debugging log */ 167 #define LFS_MAX_ACTIVE 10 /* Dirty segments before ckp forced */ 168 169 /* 170 * Fixed filesystem layout parameters 171 */ 172 #define LFS_LABELPAD 8192 /* LFS label size */ 173 #define LFS_SBPAD 8192 /* LFS superblock size */ 174 175 #define LFS_UNUSED_INUM 0 /* 0: out of band inode number */ 176 #define LFS_IFILE_INUM 1 /* 1: IFILE inode number */ 177 /* 2: Root inode number */ 178 #define LFS_LOSTFOUNDINO 3 /* 3: lost+found inode number */ 179 #define LFS_FIRST_INUM 4 /* 4: first free inode number */ 180 181 /* 182 * The root inode is the root of the file system. Inode 0 can't be used for 183 * normal purposes and historically bad blocks were linked to inode 1, thus 184 * the root inode is 2. (Inode 1 is no longer used for this purpose, however 185 * numerous dump tapes make this assumption, so we are stuck with it). 186 */ 187 #define ULFS_ROOTINO ((ino_t)2) 188 189 /* 190 * The Whiteout inode# is a dummy non-zero inode number which will 191 * never be allocated to a real file. It is used as a place holder 192 * in the directory entry which has been tagged as a LFS_DT_WHT entry. 193 * See the comments about ULFS_ROOTINO above. 194 */ 195 #define ULFS_WINO ((ino_t)1) 196 197 198 #define LFS_V1_SUMMARY_SIZE 512 /* V1 fixed summary size */ 199 #define LFS_DFL_SUMMARY_SIZE 512 /* Default summary size */ 200 201 #define LFS_MAXNAMLEN 255 /* maximum name length in a dir */ 202 203 #define ULFS_NXADDR 2 204 #define ULFS_NDADDR 12 /* Direct addresses in inode. */ 205 #define ULFS_NIADDR 3 /* Indirect addresses in inode. */ 206 207 /* 208 * Adjustable filesystem parameters 209 */ 210 #ifndef LFS_ATIME_IFILE 211 # define LFS_ATIME_IFILE 0 /* Store atime info in ifile (optional in LFSv1) */ 212 #endif 213 #define LFS_MARKV_MAXBLKCNT 65536 /* Max block count for lfs_markv() */ 214 215 /* 216 * Directories 217 */ 218 219 /* 220 * Directories in LFS are files; they use the same inode and block 221 * mapping structures that regular files do. The directory per se is 222 * manifested in the file contents: an unordered, unstructured 223 * sequence of variable-size directory entries. 224 * 225 * This format and structure is taken (via what was originally shared 226 * ufs-level code) from FFS. Each directory entry is a fixed header 227 * followed by a string, the total length padded to a 4-byte boundary. 228 * All strings include a null terminator; the maximum string length 229 * is LFS_MAXNAMLEN, which is 255. 230 * 231 * The directory entry header structure (struct lfs_dirheader) is just 232 * the header information. A complete entry is this plus a null- 233 * terminated name following it, plus some amount of padding. The 234 * length of the name (not including the null terminator) is given by 235 * the namlen field of the header; the complete record length, 236 * including the null terminator and padding, is given by the reclen 237 * field of the header. The record length is always 4-byte aligned. 238 * (Even on 64-bit volumes, the record length is only 4-byte aligned, 239 * not 8-byte.) 240 * 241 * Historically, FFS directories were/are organized into blocks of 242 * size DIRBLKSIZE that can be written atomically to disk at the 243 * hardware level. Directory entries are not allowed to cross the 244 * boundaries of these blocks. The resulting atomicity is important 245 * for the integrity of FFS volumes; however, for LFS it's irrelevant. 246 * All we have to care about is not writing out directories that 247 * confuse earlier ufs-based versions of the LFS code. 248 * 249 * This means [to be determined]. (XXX) 250 * 251 * As DIRBLKSIZE in its FFS sense is hardware-dependent, and file 252 * system images do from time to time move to different hardware, code 253 * that reads directories should be prepared to handle directories 254 * written in a context where DIRBLKSIZE was different (smaller or 255 * larger) than its current value. Note however that it is not 256 * sensible for DIRBLKSIZE to be larger than the volume fragment size, 257 * and not practically possible for it to be larger than the volume 258 * block size. 259 * 260 * Some further notes: 261 * - the LFS_DIRSIZ macro provides the minimum space needed to hold 262 * a directory entry. 263 * - any particular entry may be arbitrarily larger (which is why the 264 * header stores both the entry size and the name size) to pad out 265 * unused space. 266 * - historically the padding in an entry is not necessarily zeroed 267 * but may contain trash. 268 * - dp->d_reclen is the size of the entry. This is always 4-byte 269 * aligned. 270 * - dp->d_namlen is the length of the string, and should always be 271 * the same as strlen(dp->d_name). 272 * - in particular, space available in an entry is given by 273 * dp->d_reclen - LFS_DIRSIZ(dp), and all space available within a 274 * directory block is tucked away within an existing entry. 275 * - all space within a directory block is part of some entry. 276 * - therefore, inserting a new entry requires finding and 277 * splitting a suitable existing entry, and when entries are 278 * removed their space is merged into the entry ahead of them. 279 * - an empty/unused entry has d_ino set to 0. This normally only 280 * appears in the first entry in a block, as elsewhere the unused 281 * entry should have been merged into the one before it. However, 282 * fsck leaves such entries behind so they must be tolerated 283 * elsewhere. 284 * - a completely empty directory block has one entry whose 285 * d_reclen is DIRBLKSIZ and whose d_ino is 0. 286 * 287 * The "old directory format" referenced by the fs->lfs_isolddirfmt 288 * flag (and some other things) refers to when the type field was 289 * added to directory entries. This change was made to FFS in the 80s, 290 * well before LFS was first written; there should be no LFS volumes 291 * (and certainly no LFS v2-format volumes or LFS64 volumes) where the 292 * old format pertains. All of the related logic should probably be 293 * removed; however, it hasn't been yet, and we get to carry it around 294 * until we can be conclusively sure it isn't needed. 295 * 296 * In the "old directory format" there is no type field and the namlen 297 * field is correspondingly 16 bits wide. On big-endian volumes this 298 * has no effect: namlen cannot exceed 255, so the upper byte is 299 * always 0 and this reads back from the type field as LFS_DT_UNKNOWN. 300 * On little-endian volumes, the namlen field will always be 0 and 301 * the namlen value needs to be read out of the type field. (The type 302 * is always LFS_DT_UNKNOWN.) The directory accessor functions take 303 * care of this so nothing else needs to be aware of it. 304 * 305 * LFS_OLDDIRFMT and LFS_NEWDIRFMT are code numbers for the old and 306 * new directory format respectively. These codes do not appear on 307 * disk; they're generated from a runtime macro called FSFMT() that's 308 * cued by other things. This is why (confusingly) LFS_OLDDIRFMT is 1 309 * and LFS_NEWDIRFMT is 0. 310 * 311 * FSFMT(), LFS_OLDDIRFMT, and LFS_NEWDIRFMT should be removed. (XXX) 312 */ 313 314 /* 315 * Directory block size. 316 */ 317 #undef LFS_DIRBLKSIZ 318 #define LFS_DIRBLKSIZ DEV_BSIZE 319 320 /* 321 * Convert between stat structure type codes and directory entry type codes. 322 */ 323 #define LFS_IFTODT(mode) (((mode) & 0170000) >> 12) 324 #define LFS_DTTOIF(dirtype) ((dirtype) << 12) 325 326 /* 327 * Theoretically, directories can be more than 2Gb in length; however, in 328 * practice this seems unlikely. So, we define the type doff_t as a 32-bit 329 * quantity to keep down the cost of doing lookup on a 32-bit machine. 330 */ 331 #define doff_t int32_t 332 #define lfs_doff_t int32_t 333 #define LFS_MAXDIRSIZE (0x7fffffff) 334 335 /* 336 * File types for d_type 337 */ 338 #define LFS_DT_UNKNOWN 0 339 #define LFS_DT_FIFO 1 340 #define LFS_DT_CHR 2 341 #define LFS_DT_DIR 4 342 #define LFS_DT_BLK 6 343 #define LFS_DT_REG 8 344 #define LFS_DT_LNK 10 345 #define LFS_DT_SOCK 12 346 #define LFS_DT_WHT 14 347 348 /* 349 * (See notes above) 350 */ 351 352 struct lfs_dirheader32 { 353 u_int32_t dh_ino; /* inode number of entry */ 354 u_int16_t dh_reclen; /* length of this record */ 355 u_int8_t dh_type; /* file type, see below */ 356 u_int8_t dh_namlen; /* length of string in d_name */ 357 }; 358 359 struct lfs_dirheader64 { 360 u_int32_t dh_inoA; /* inode number of entry */ 361 u_int32_t dh_inoB; /* inode number of entry */ 362 u_int16_t dh_reclen; /* length of this record */ 363 u_int8_t dh_type; /* file type, see below */ 364 u_int8_t dh_namlen; /* length of string in d_name */ 365 }; 366 367 union lfs_dirheader { 368 struct lfs_dirheader64 u_64; 369 struct lfs_dirheader32 u_32; 370 }; 371 372 typedef union lfs_dirheader LFS_DIRHEADER; 373 374 /* 375 * Template for manipulating directories. 376 */ 377 378 struct lfs_dirtemplate32 { 379 struct lfs_dirheader32 dot_header; 380 char dot_name[4]; /* must be multiple of 4 */ 381 struct lfs_dirheader32 dotdot_header; 382 char dotdot_name[4]; /* ditto */ 383 }; 384 385 struct lfs_dirtemplate64 { 386 struct lfs_dirheader64 dot_header; 387 char dot_name[4]; /* must be multiple of 4 */ 388 struct lfs_dirheader64 dotdot_header; 389 char dotdot_name[4]; /* ditto */ 390 }; 391 392 union lfs_dirtemplate { 393 struct lfs_dirtemplate64 u_64; 394 struct lfs_dirtemplate32 u_32; 395 }; 396 397 #if 0 398 /* 399 * This is the old format of directories, sans type element. 400 */ 401 struct lfs_odirtemplate { 402 u_int32_t dot_ino; 403 int16_t dot_reclen; 404 u_int16_t dot_namlen; 405 char dot_name[4]; /* must be multiple of 4 */ 406 u_int32_t dotdot_ino; 407 int16_t dotdot_reclen; 408 u_int16_t dotdot_namlen; 409 char dotdot_name[4]; /* ditto */ 410 }; 411 #endif 412 413 /* 414 * Inodes 415 */ 416 417 /* 418 * A dinode contains all the meta-data associated with a LFS file. 419 * This structure defines the on-disk format of a dinode. Since 420 * this structure describes an on-disk structure, all its fields 421 * are defined by types with precise widths. 422 */ 423 424 struct lfs32_dinode { 425 u_int16_t di_mode; /* 0: IFMT, permissions; see below. */ 426 int16_t di_nlink; /* 2: File link count. */ 427 u_int32_t di_inumber; /* 4: Inode number. */ 428 u_int64_t di_size; /* 8: File byte count. */ 429 int32_t di_atime; /* 16: Last access time. */ 430 int32_t di_atimensec; /* 20: Last access time. */ 431 int32_t di_mtime; /* 24: Last modified time. */ 432 int32_t di_mtimensec; /* 28: Last modified time. */ 433 int32_t di_ctime; /* 32: Last inode change time. */ 434 int32_t di_ctimensec; /* 36: Last inode change time. */ 435 int32_t di_db[ULFS_NDADDR]; /* 40: Direct disk blocks. */ 436 int32_t di_ib[ULFS_NIADDR]; /* 88: Indirect disk blocks. */ 437 u_int32_t di_flags; /* 100: Status flags (chflags). */ 438 u_int32_t di_blocks; /* 104: Blocks actually held. */ 439 int32_t di_gen; /* 108: Generation number. */ 440 u_int32_t di_uid; /* 112: File owner. */ 441 u_int32_t di_gid; /* 116: File group. */ 442 u_int64_t di_modrev; /* 120: i_modrev for NFSv4 */ 443 }; 444 445 struct lfs64_dinode { 446 u_int16_t di_mode; /* 0: IFMT, permissions; see below. */ 447 int16_t di_nlink; /* 2: File link count. */ 448 u_int32_t di_uid; /* 4: File owner. */ 449 u_int32_t di_gid; /* 8: File group. */ 450 u_int32_t di_blksize; /* 12: Inode blocksize. */ 451 u_int64_t di_size; /* 16: File byte count. */ 452 u_int64_t di_blocks; /* 24: Bytes actually held. */ 453 int64_t di_atime; /* 32: Last access time. */ 454 int64_t di_mtime; /* 40: Last modified time. */ 455 int64_t di_ctime; /* 48: Last inode change time. */ 456 int64_t di_birthtime; /* 56: Inode creation time. */ 457 int32_t di_mtimensec; /* 64: Last modified time. */ 458 int32_t di_atimensec; /* 68: Last access time. */ 459 int32_t di_ctimensec; /* 72: Last inode change time. */ 460 int32_t di_birthnsec; /* 76: Inode creation time. */ 461 int32_t di_gen; /* 80: Generation number. */ 462 u_int32_t di_kernflags; /* 84: Kernel flags. */ 463 u_int32_t di_flags; /* 88: Status flags (chflags). */ 464 int32_t di_extsize; /* 92: External attributes block. */ 465 int64_t di_extb[ULFS_NXADDR];/* 96: External attributes block. */ 466 int64_t di_db[ULFS_NDADDR]; /* 112: Direct disk blocks. */ 467 int64_t di_ib[ULFS_NIADDR]; /* 208: Indirect disk blocks. */ 468 u_int64_t di_modrev; /* 232: i_modrev for NFSv4 */ 469 u_int64_t di_inumber; /* 240: Inode number */ 470 u_int64_t di_spare[1]; /* 244: Reserved; currently unused */ 471 }; 472 473 union lfs_dinode { 474 struct lfs64_dinode u_64; 475 struct lfs32_dinode u_32; 476 }; 477 478 /* 479 * The di_db fields may be overlaid with other information for 480 * file types that do not have associated disk storage. Block 481 * and character devices overlay the first data block with their 482 * dev_t value. Short symbolic links place their path in the 483 * di_db area. 484 */ 485 #define di_rdev di_db[0] 486 487 /* Size of the on-disk inode. */ 488 //#define LFS_DINODE1_SIZE (sizeof(struct ulfs1_dinode)) /* 128 */ 489 //#define LFS_DINODE2_SIZE (sizeof(struct ulfs2_dinode)) 490 491 /* File types, found in the upper bits of di_mode. */ 492 #define LFS_IFMT 0170000 /* Mask of file type. */ 493 #define LFS_IFIFO 0010000 /* Named pipe (fifo). */ 494 #define LFS_IFCHR 0020000 /* Character device. */ 495 #define LFS_IFDIR 0040000 /* Directory file. */ 496 #define LFS_IFBLK 0060000 /* Block device. */ 497 #define LFS_IFREG 0100000 /* Regular file. */ 498 #define LFS_IFLNK 0120000 /* Symbolic link. */ 499 #define LFS_IFSOCK 0140000 /* UNIX domain socket. */ 500 #define LFS_IFWHT 0160000 /* Whiteout. */ 501 502 /* 503 * "struct buf" associated definitions 504 */ 505 506 /* Unassigned disk addresses. */ 507 #define UNASSIGNED -1 508 #define UNWRITTEN -2 509 510 /* Unused logical block number */ 511 #define LFS_UNUSED_LBN -1 512 513 /* 514 * "struct inode" associated definitions 515 */ 516 517 /* For convenience */ 518 #define IN_ALLMOD (IN_MODIFIED|IN_ACCESS|IN_CHANGE|IN_UPDATE|IN_MODIFY|IN_ACCESSED|IN_CLEANING) 519 520 /* 521 * On-disk and in-memory checkpoint segment usage structure. 522 */ 523 typedef struct segusage SEGUSE; 524 struct segusage { 525 u_int32_t su_nbytes; /* 0: number of live bytes */ 526 u_int32_t su_olastmod; /* 4: SEGUSE last modified timestamp */ 527 u_int16_t su_nsums; /* 8: number of summaries in segment */ 528 u_int16_t su_ninos; /* 10: number of inode blocks in seg */ 529 530 #define SEGUSE_ACTIVE 0x01 /* segment currently being written */ 531 #define SEGUSE_DIRTY 0x02 /* segment has data in it */ 532 #define SEGUSE_SUPERBLOCK 0x04 /* segment contains a superblock */ 533 #define SEGUSE_ERROR 0x08 /* cleaner: do not clean segment */ 534 #define SEGUSE_EMPTY 0x10 /* segment is empty */ 535 #define SEGUSE_INVAL 0x20 /* segment is invalid */ 536 u_int32_t su_flags; /* 12: segment flags */ 537 u_int64_t su_lastmod; /* 16: last modified timestamp */ 538 }; 539 540 typedef struct segusage_v1 SEGUSE_V1; 541 struct segusage_v1 { 542 u_int32_t su_nbytes; /* 0: number of live bytes */ 543 u_int32_t su_lastmod; /* 4: SEGUSE last modified timestamp */ 544 u_int16_t su_nsums; /* 8: number of summaries in segment */ 545 u_int16_t su_ninos; /* 10: number of inode blocks in seg */ 546 u_int32_t su_flags; /* 12: segment flags */ 547 }; 548 549 /* 550 * On-disk file information. One per file with data blocks in the segment. 551 * 552 * The FINFO structure is a header; it is followed by fi_nblocks block 553 * pointers, which are logical block numbers of the file. (These are the 554 * blocks of the file present in this segment.) 555 */ 556 557 typedef struct finfo64 FINFO64; 558 struct finfo64 { 559 u_int32_t fi_nblocks; /* number of blocks */ 560 u_int32_t fi_version; /* version number */ 561 u_int64_t fi_ino; /* inode number */ 562 u_int32_t fi_lastlength; /* length of last block in array */ 563 u_int32_t fi_pad; /* unused */ 564 }; 565 566 typedef struct finfo32 FINFO32; 567 struct finfo32 { 568 u_int32_t fi_nblocks; /* number of blocks */ 569 u_int32_t fi_version; /* version number */ 570 u_int32_t fi_ino; /* inode number */ 571 u_int32_t fi_lastlength; /* length of last block in array */ 572 }; 573 574 typedef union finfo { 575 struct finfo64 u_64; 576 struct finfo32 u_32; 577 } FINFO; 578 579 /* 580 * inode info (part of the segment summary) 581 * 582 * Each one of these is just a block number; wrapping the structure 583 * around it gives more contextual information in the code about 584 * what's going on. 585 */ 586 587 typedef struct iinfo64 { 588 uint64_t ii_block; /* block number */ 589 } IINFO64; 590 591 typedef struct iinfo32 { 592 uint32_t ii_block; /* block number */ 593 } IINFO32; 594 595 typedef union iinfo { 596 struct iinfo64 u_64; 597 struct iinfo32 u_32; 598 } IINFO; 599 600 /* 601 * Index file inode entries. 602 */ 603 604 /* magic value for daddrs */ 605 #define LFS_UNUSED_DADDR 0 /* out-of-band daddr */ 606 /* magic value for if_nextfree */ 607 #define LFS_ORPHAN_NEXTFREE (~(u_int32_t)0) /* indicate orphaned file */ 608 609 typedef struct ifile64 IFILE64; 610 struct ifile64 { 611 u_int32_t if_version; /* inode version number */ 612 u_int32_t if_atime_nsec; /* and nanoseconds */ 613 u_int64_t if_atime_sec; /* Last access time, seconds */ 614 int64_t if_daddr; /* inode disk address */ 615 u_int64_t if_nextfree; /* next-unallocated inode */ 616 }; 617 618 typedef struct ifile32 IFILE32; 619 struct ifile32 { 620 u_int32_t if_version; /* inode version number */ 621 int32_t if_daddr; /* inode disk address */ 622 u_int32_t if_nextfree; /* next-unallocated inode */ 623 u_int32_t if_atime_sec; /* Last access time, seconds */ 624 u_int32_t if_atime_nsec; /* and nanoseconds */ 625 }; 626 627 typedef struct ifile_v1 IFILE_V1; 628 struct ifile_v1 { 629 u_int32_t if_version; /* inode version number */ 630 int32_t if_daddr; /* inode disk address */ 631 u_int32_t if_nextfree; /* next-unallocated inode */ 632 #if LFS_ATIME_IFILE 633 #error "this cannot work" 634 struct timespec if_atime; /* Last access time */ 635 #endif 636 }; 637 638 /* 639 * Note: struct ifile_v1 is often handled by accessing the first three 640 * fields of struct ifile32. (XXX: Blah. This should be cleaned up as 641 * it may in some cases violate the strict-aliasing rules.) 642 */ 643 typedef union ifile { 644 struct ifile64 u_64; 645 struct ifile32 u_32; 646 struct ifile_v1 u_v1; 647 } IFILE; 648 649 /* 650 * Cleaner information structure. This resides in the ifile and is used 651 * to pass information from the kernel to the cleaner. 652 */ 653 654 /* flags for ->flags */ 655 #define LFS_CLEANER_MUST_CLEAN 0x01 656 657 typedef struct _cleanerinfo32 { 658 u_int32_t clean; /* 0: number of clean segments */ 659 u_int32_t dirty; /* 4: number of dirty segments */ 660 int32_t bfree; /* 8: disk blocks free */ 661 int32_t avail; /* 12: disk blocks available */ 662 u_int32_t free_head; /* 16: head of the inode free list */ 663 u_int32_t free_tail; /* 20: tail of the inode free list */ 664 u_int32_t flags; /* 24: status word from the kernel */ 665 } CLEANERINFO32; 666 667 typedef struct _cleanerinfo64 { 668 u_int32_t clean; /* 0: number of clean segments */ 669 u_int32_t dirty; /* 4: number of dirty segments */ 670 int64_t bfree; /* 8: disk blocks free */ 671 int64_t avail; /* 16: disk blocks available */ 672 u_int64_t free_head; /* 24: head of the inode free list */ 673 u_int64_t free_tail; /* 32: tail of the inode free list */ 674 u_int32_t flags; /* 40: status word from the kernel */ 675 u_int32_t pad; /* 44: must be 64-bit aligned */ 676 } CLEANERINFO64; 677 678 /* this must not go to disk directly of course */ 679 typedef union _cleanerinfo { 680 CLEANERINFO32 u_32; 681 CLEANERINFO64 u_64; 682 } CLEANERINFO; 683 684 /* 685 * On-disk segment summary information 686 */ 687 688 /* magic value for ss_magic */ 689 #define SS_MAGIC 0x061561 690 691 /* flags for ss_flags */ 692 #define SS_DIROP 0x01 /* segment begins a dirop */ 693 #define SS_CONT 0x02 /* more partials to finish this write*/ 694 #define SS_CLEAN 0x04 /* written by the cleaner */ 695 #define SS_RFW 0x08 /* written by the roll-forward agent */ 696 #define SS_RECLAIM 0x10 /* written by the roll-forward agent */ 697 698 /* type used for reading checksum signatures from metadata structures */ 699 typedef uint32_t lfs_checkword; 700 701 typedef struct segsum_v1 SEGSUM_V1; 702 struct segsum_v1 { 703 u_int32_t ss_sumsum; /* 0: check sum of summary block */ 704 u_int32_t ss_datasum; /* 4: check sum of data */ 705 u_int32_t ss_magic; /* 8: segment summary magic number */ 706 int32_t ss_next; /* 12: next segment */ 707 u_int32_t ss_create; /* 16: creation time stamp */ 708 u_int16_t ss_nfinfo; /* 20: number of file info structures */ 709 u_int16_t ss_ninos; /* 22: number of inodes in summary */ 710 u_int16_t ss_flags; /* 24: used for directory operations */ 711 u_int16_t ss_pad; /* 26: extra space */ 712 /* FINFO's and inode daddr's... */ 713 }; 714 715 typedef struct segsum32 SEGSUM32; 716 struct segsum32 { 717 u_int32_t ss_sumsum; /* 0: check sum of summary block */ 718 u_int32_t ss_datasum; /* 4: check sum of data */ 719 u_int32_t ss_magic; /* 8: segment summary magic number */ 720 int32_t ss_next; /* 12: next segment (disk address) */ 721 u_int32_t ss_ident; /* 16: roll-forward fsid */ 722 u_int16_t ss_nfinfo; /* 20: number of file info structures */ 723 u_int16_t ss_ninos; /* 22: number of inodes in summary */ 724 u_int16_t ss_flags; /* 24: used for directory operations */ 725 u_int8_t ss_pad[2]; /* 26: extra space */ 726 u_int32_t ss_reclino; /* 28: inode being reclaimed */ 727 u_int64_t ss_serial; /* 32: serial number */ 728 u_int64_t ss_create; /* 40: time stamp */ 729 /* FINFO's and inode daddr's... */ 730 }; 731 732 typedef struct segsum64 SEGSUM64; 733 struct segsum64 { 734 u_int32_t ss_sumsum; /* 0: check sum of summary block */ 735 u_int32_t ss_datasum; /* 4: check sum of data */ 736 u_int32_t ss_magic; /* 8: segment summary magic number */ 737 u_int32_t ss_ident; /* 12: roll-forward fsid */ 738 int64_t ss_next; /* 16: next segment (disk address) */ 739 u_int16_t ss_nfinfo; /* 24: number of file info structures */ 740 u_int16_t ss_ninos; /* 26: number of inodes in summary */ 741 u_int16_t ss_flags; /* 28: used for directory operations */ 742 u_int8_t ss_pad[2]; /* 30: extra space */ 743 u_int64_t ss_reclino; /* 32: inode being reclaimed */ 744 u_int64_t ss_serial; /* 40: serial number */ 745 u_int64_t ss_create; /* 48: time stamp */ 746 /* FINFO's and inode daddr's... */ 747 }; 748 749 typedef union segsum SEGSUM; 750 union segsum { 751 struct segsum64 u_64; 752 struct segsum32 u_32; 753 struct segsum_v1 u_v1; 754 }; 755 756 757 /* 758 * On-disk super block. 759 * 760 * We have separate superblock structures for the 32-bit and 64-bit 761 * LFS, and accessor functions to hide the differences. 762 * 763 * For lfs64, the format version is always 2; version 1 lfs is old. 764 * For both, the inode format version is 0; for lfs32 this selects the 765 * same 32-bit inode as always, and for lfs64 this selects the larger 766 * 64-bit inode structure we got from ffsv2. 767 * 768 * In lfs64: 769 * - inode numbers are still 32 bit 770 * - segments may not be larger than 4G (counted in bytes) 771 * - there may not be more than 2^32 (or perhaps 2^31) segments 772 * - the total volume size is limited to 2^63 frags and/or 2^63 773 * disk blocks, and probably in practice 2^63 bytes. 774 */ 775 776 #define LFS_MAGIC 0x070162 777 #define LFS_MAGIC_SWAPPED 0x62010700 778 779 #define LFS64_MAGIC 0x19620701 780 #define LFS64_MAGIC_SWAPPED 0x01076219 781 782 #define LFS_VERSION 2 783 784 #define LFS_MIN_SBINTERVAL 5 /* min superblock segment spacing */ 785 #define LFS_MAXNUMSB 10 /* max number of superblocks */ 786 787 /* flags for dlfs_pflags */ 788 #define LFS_PF_CLEAN 0x1 789 790 /* Inode format versions */ 791 #define LFS_44INODEFMT 0 792 #define LFS_MAXINODEFMT 0 793 794 struct dlfs { 795 u_int32_t dlfs_magic; /* 0: magic number */ 796 u_int32_t dlfs_version; /* 4: version number */ 797 798 u_int32_t dlfs_size; /* 8: number of blocks in fs (v1) */ 799 /* number of frags in fs (v2) */ 800 u_int32_t dlfs_ssize; /* 12: number of blocks per segment (v1) */ 801 /* number of bytes per segment (v2) */ 802 u_int32_t dlfs_dsize; /* 16: number of disk blocks in fs */ 803 u_int32_t dlfs_bsize; /* 20: file system block size */ 804 u_int32_t dlfs_fsize; /* 24: size of frag blocks in fs */ 805 u_int32_t dlfs_frag; /* 28: number of frags in a block in fs */ 806 807 /* Checkpoint region. */ 808 u_int32_t dlfs_freehd; /* 32: start of the free inode list */ 809 int32_t dlfs_bfree; /* 36: number of free frags */ 810 u_int32_t dlfs_nfiles; /* 40: number of allocated inodes */ 811 int32_t dlfs_avail; /* 44: blocks available for writing */ 812 int32_t dlfs_uinodes; /* 48: inodes in cache not yet on disk */ 813 int32_t dlfs_idaddr; /* 52: inode file disk address */ 814 u_int32_t dlfs_ifile; /* 56: inode file inode number */ 815 int32_t dlfs_lastseg; /* 60: address of last segment written */ 816 int32_t dlfs_nextseg; /* 64: address of next segment to write */ 817 int32_t dlfs_curseg; /* 68: current segment being written */ 818 int32_t dlfs_offset; /* 72: offset in curseg for next partial */ 819 int32_t dlfs_lastpseg; /* 76: address of last partial written */ 820 u_int32_t dlfs_inopf; /* 80: v1: time stamp; v2: inodes per frag */ 821 822 /* These are configuration parameters. */ 823 u_int32_t dlfs_minfree; /* 84: minimum percentage of free blocks */ 824 825 /* These fields can be computed from the others. */ 826 u_int64_t dlfs_maxfilesize; /* 88: maximum representable file size */ 827 u_int32_t dlfs_fsbpseg; /* 96: frags (fsb) per segment */ 828 u_int32_t dlfs_inopb; /* 100: inodes per block */ 829 u_int32_t dlfs_ifpb; /* 104: IFILE entries per block */ 830 u_int32_t dlfs_sepb; /* 108: SEGUSE entries per block */ 831 u_int32_t dlfs_nindir; /* 112: indirect pointers per block */ 832 u_int32_t dlfs_nseg; /* 116: number of segments */ 833 u_int32_t dlfs_nspf; /* 120: number of sectors per fragment */ 834 u_int32_t dlfs_cleansz; /* 124: cleaner info size in blocks */ 835 u_int32_t dlfs_segtabsz; /* 128: segment table size in blocks */ 836 u_int32_t dlfs_segmask; /* 132: calculate offset within a segment */ 837 u_int32_t dlfs_segshift; /* 136: fast mult/div for segments */ 838 u_int32_t dlfs_bshift; /* 140: calc block number from file offset */ 839 u_int32_t dlfs_ffshift; /* 144: fast mult/div for frag from file */ 840 u_int32_t dlfs_fbshift; /* 148: fast mult/div for frag from block */ 841 u_int64_t dlfs_bmask; /* 152: calc block offset from file offset */ 842 u_int64_t dlfs_ffmask; /* 160: calc frag offset from file offset */ 843 u_int64_t dlfs_fbmask; /* 168: calc frag offset from block offset */ 844 u_int32_t dlfs_blktodb; /* 176: blktodb and dbtoblk shift constant */ 845 u_int32_t dlfs_sushift; /* 180: fast mult/div for segusage table */ 846 847 int32_t dlfs_maxsymlinklen; /* 184: max length of an internal symlink */ 848 /* 188: superblock disk offsets */ 849 int32_t dlfs_sboffs[LFS_MAXNUMSB]; 850 851 u_int32_t dlfs_nclean; /* 228: Number of clean segments */ 852 u_char dlfs_fsmnt[MNAMELEN]; /* 232: name mounted on */ 853 u_int16_t dlfs_pflags; /* 322: file system persistent flags */ 854 int32_t dlfs_dmeta; /* 324: total number of dirty summaries */ 855 u_int32_t dlfs_minfreeseg; /* 328: segments not counted in bfree */ 856 u_int32_t dlfs_sumsize; /* 332: size of summary blocks */ 857 u_int64_t dlfs_serial; /* 336: serial number */ 858 u_int32_t dlfs_ibsize; /* 344: size of inode blocks */ 859 int32_t dlfs_s0addr; /* 348: start of segment 0 */ 860 u_int64_t dlfs_tstamp; /* 352: time stamp */ 861 u_int32_t dlfs_inodefmt; /* 360: inode format version */ 862 u_int32_t dlfs_interleave; /* 364: segment interleave */ 863 u_int32_t dlfs_ident; /* 368: per-fs identifier */ 864 u_int32_t dlfs_fsbtodb; /* 372: fsbtodb and dbtodsb shift constant */ 865 u_int32_t dlfs_resvseg; /* 376: segments reserved for the cleaner */ 866 int8_t dlfs_pad[128]; /* 380: round to 512 bytes */ 867 /* Checksum -- last valid disk field. */ 868 u_int32_t dlfs_cksum; /* 508: checksum for superblock checking */ 869 }; 870 871 struct dlfs64 { 872 u_int32_t dlfs_magic; /* 0: magic number */ 873 u_int32_t dlfs_version; /* 4: version number (2) */ 874 875 u_int64_t dlfs_size; /* 8: number of frags in fs (v2) */ 876 u_int64_t dlfs_dsize; /* 16: number of disk blocks in fs */ 877 u_int32_t dlfs_ssize; /* 24: number of bytes per segment (v2) */ 878 u_int32_t dlfs_bsize; /* 28: file system block size */ 879 u_int32_t dlfs_fsize; /* 32: size of frag blocks in fs */ 880 u_int32_t dlfs_frag; /* 36: number of frags in a block in fs */ 881 882 /* Checkpoint region. */ 883 u_int64_t dlfs_freehd; /* 40: start of the free inode list */ 884 u_int64_t dlfs_nfiles; /* 48: number of allocated inodes */ 885 int64_t dlfs_bfree; /* 56: number of free frags */ 886 int64_t dlfs_avail; /* 64: blocks available for writing */ 887 int64_t dlfs_idaddr; /* 72: inode file disk address */ 888 int32_t dlfs_uinodes; /* 80: inodes in cache not yet on disk */ 889 u_int32_t dlfs_unused_0; /* 84: not used */ 890 int64_t dlfs_lastseg; /* 88: address of last segment written */ 891 int64_t dlfs_nextseg; /* 96: address of next segment to write */ 892 int64_t dlfs_curseg; /* 104: current segment being written */ 893 int64_t dlfs_offset; /* 112: offset in curseg for next partial */ 894 int64_t dlfs_lastpseg; /* 120: address of last partial written */ 895 u_int32_t dlfs_inopf; /* 128: inodes per frag */ 896 897 /* These are configuration parameters. */ 898 u_int32_t dlfs_minfree; /* 132: minimum percentage of free blocks */ 899 900 /* These fields can be computed from the others. */ 901 u_int64_t dlfs_maxfilesize; /* 136: maximum representable file size */ 902 u_int32_t dlfs_fsbpseg; /* 144: frags (fsb) per segment */ 903 u_int32_t dlfs_inopb; /* 148: inodes per block */ 904 u_int32_t dlfs_ifpb; /* 152: IFILE entries per block */ 905 u_int32_t dlfs_sepb; /* 156: SEGUSE entries per block */ 906 u_int32_t dlfs_nindir; /* 160: indirect pointers per block */ 907 u_int32_t dlfs_nseg; /* 164: number of segments */ 908 u_int32_t dlfs_nspf; /* 168: number of sectors per fragment */ 909 u_int32_t dlfs_cleansz; /* 172: cleaner info size in blocks */ 910 u_int32_t dlfs_segtabsz; /* 176: segment table size in blocks */ 911 u_int32_t dlfs_bshift; /* 180: calc block number from file offset */ 912 u_int32_t dlfs_ffshift; /* 184: fast mult/div for frag from file */ 913 u_int32_t dlfs_fbshift; /* 188: fast mult/div for frag from block */ 914 u_int64_t dlfs_bmask; /* 192: calc block offset from file offset */ 915 u_int64_t dlfs_ffmask; /* 200: calc frag offset from file offset */ 916 u_int64_t dlfs_fbmask; /* 208: calc frag offset from block offset */ 917 u_int32_t dlfs_blktodb; /* 216: blktodb and dbtoblk shift constant */ 918 u_int32_t dlfs_sushift; /* 220: fast mult/div for segusage table */ 919 920 /* 224: superblock disk offsets */ 921 int64_t dlfs_sboffs[LFS_MAXNUMSB]; 922 923 int32_t dlfs_maxsymlinklen; /* 304: max len of an internal symlink */ 924 u_int32_t dlfs_nclean; /* 308: Number of clean segments */ 925 u_char dlfs_fsmnt[MNAMELEN]; /* 312: name mounted on */ 926 u_int16_t dlfs_pflags; /* 402: file system persistent flags */ 927 int32_t dlfs_dmeta; /* 404: total number of dirty summaries */ 928 u_int32_t dlfs_minfreeseg; /* 408: segments not counted in bfree */ 929 u_int32_t dlfs_sumsize; /* 412: size of summary blocks */ 930 u_int32_t dlfs_ibsize; /* 416: size of inode blocks */ 931 u_int32_t dlfs_inodefmt; /* 420: inode format version */ 932 u_int64_t dlfs_serial; /* 424: serial number */ 933 int64_t dlfs_s0addr; /* 432: start of segment 0 */ 934 u_int64_t dlfs_tstamp; /* 440: time stamp */ 935 u_int32_t dlfs_interleave; /* 448: segment interleave */ 936 u_int32_t dlfs_ident; /* 452: per-fs identifier */ 937 u_int32_t dlfs_fsbtodb; /* 456: fsbtodb and dbtodsb shift constant */ 938 u_int32_t dlfs_resvseg; /* 460: segments reserved for the cleaner */ 939 int8_t dlfs_pad[44]; /* 464: round to 512 bytes */ 940 /* Checksum -- last valid disk field. */ 941 u_int32_t dlfs_cksum; /* 508: checksum for superblock checking */ 942 }; 943 944 /* Type used for the inode bitmap */ 945 typedef u_int32_t lfs_bm_t; 946 947 /* 948 * Linked list of segments whose byte count needs updating following a 949 * file truncation. 950 */ 951 struct segdelta { 952 long segnum; 953 size_t num; 954 LIST_ENTRY(segdelta) list; 955 }; 956 957 /* 958 * In-memory super block. 959 */ 960 struct lfs { 961 union { /* on-disk parameters */ 962 struct dlfs u_32; 963 struct dlfs64 u_64; 964 } lfs_dlfs_u; 965 966 /* These fields are set at mount time and are meaningless on disk. */ 967 unsigned lfs_is64 : 1, /* are we lfs64 or lfs32? */ 968 lfs_dobyteswap : 1, /* are we opposite-endian? */ 969 lfs_hasolddirfmt : 1; /* dir entries have no d_type */ 970 971 struct segment *lfs_sp; /* current segment being written */ 972 struct vnode *lfs_ivnode; /* vnode for the ifile */ 973 u_int32_t lfs_seglock; /* single-thread the segment writer */ 974 pid_t lfs_lockpid; /* pid of lock holder */ 975 lwpid_t lfs_locklwp; /* lwp of lock holder */ 976 u_int32_t lfs_iocount; /* number of ios pending */ 977 u_int32_t lfs_writer; /* don't allow any dirops to start */ 978 u_int32_t lfs_dirops; /* count of active directory ops */ 979 u_int32_t lfs_dirvcount; /* count of VDIROP nodes in this fs */ 980 u_int32_t lfs_doifile; /* Write ifile blocks on next write */ 981 u_int32_t lfs_nactive; /* Number of segments since last ckp */ 982 int8_t lfs_fmod; /* super block modified flag */ 983 int8_t lfs_ronly; /* mounted read-only flag */ 984 #define LFS_NOTYET 0x01 985 #define LFS_IFDIRTY 0x02 986 #define LFS_WARNED 0x04 987 #define LFS_UNDIROP 0x08 988 int8_t lfs_flags; /* currently unused flag */ 989 u_int16_t lfs_activesb; /* toggle between superblocks */ 990 daddr_t lfs_sbactive; /* disk address of current sb write */ 991 struct vnode *lfs_flushvp; /* vnode being flushed */ 992 int lfs_flushvp_fakevref; /* fake vref count for flushvp */ 993 struct vnode *lfs_unlockvp; /* being inactivated in lfs_segunlock */ 994 u_int32_t lfs_diropwait; /* # procs waiting on dirop flush */ 995 size_t lfs_devbsize; /* Device block size */ 996 size_t lfs_devbshift; /* Device block shift */ 997 krwlock_t lfs_fraglock; 998 krwlock_t lfs_iflock; /* Ifile lock */ 999 kcondvar_t lfs_stopcv; /* Wrap lock */ 1000 struct lwp *lfs_stoplwp; 1001 pid_t lfs_rfpid; /* Process ID of roll-forward agent */ 1002 int lfs_nadirop; /* number of active dirop nodes */ 1003 long lfs_ravail; /* blocks pre-reserved for writing */ 1004 long lfs_favail; /* blocks pre-reserved for writing */ 1005 struct lfs_res_blk *lfs_resblk; /* Reserved memory for pageout */ 1006 TAILQ_HEAD(, inode) lfs_dchainhd; /* dirop vnodes */ 1007 TAILQ_HEAD(, inode) lfs_pchainhd; /* paging vnodes */ 1008 #define LFS_RESHASH_WIDTH 17 1009 LIST_HEAD(, lfs_res_blk) lfs_reshash[LFS_RESHASH_WIDTH]; 1010 int lfs_pdflush; /* pagedaemon wants us to flush */ 1011 u_int32_t **lfs_suflags; /* Segment use flags */ 1012 #ifdef _KERNEL 1013 struct pool lfs_clpool; /* Pool for struct lfs_cluster */ 1014 struct pool lfs_bpppool; /* Pool for bpp */ 1015 struct pool lfs_segpool; /* Pool for struct segment */ 1016 #endif /* _KERNEL */ 1017 #define LFS_MAX_CLEANIND 64 1018 daddr_t lfs_cleanint[LFS_MAX_CLEANIND]; /* Active cleaning intervals */ 1019 int lfs_cleanind; /* Index into intervals */ 1020 int lfs_sleepers; /* # procs sleeping this fs */ 1021 int lfs_pages; /* dirty pages blaming this fs */ 1022 lfs_bm_t *lfs_ino_bitmap; /* Inuse inodes bitmap */ 1023 int lfs_nowrap; /* Suspend log wrap */ 1024 int lfs_wrappass; /* Allow first log wrap requester to pass */ 1025 int lfs_wrapstatus; /* Wrap status */ 1026 int lfs_reclino; /* Inode being reclaimed */ 1027 daddr_t lfs_startseg; /* Segment we started writing at */ 1028 LIST_HEAD(, segdelta) lfs_segdhd; /* List of pending trunc accounting events */ 1029 1030 #ifdef _KERNEL 1031 /* ULFS-level information */ 1032 u_int32_t um_flags; /* ULFS flags (below) */ 1033 u_long um_nindir; /* indirect ptrs per block */ 1034 u_long um_lognindir; /* log2 of um_nindir */ 1035 u_long um_bptrtodb; /* indir ptr to disk block */ 1036 u_long um_seqinc; /* inc between seq blocks */ 1037 int um_maxsymlinklen; 1038 int um_dirblksiz; 1039 u_int64_t um_maxfilesize; 1040 1041 /* Stuff used by quota2 code, not currently operable */ 1042 unsigned lfs_use_quota2 : 1; 1043 uint32_t lfs_quota_magic; 1044 uint8_t lfs_quota_flags; 1045 uint64_t lfs_quotaino[2]; 1046 1047 /* Sleep address replacing &lfs_avail inside the on-disk superblock */ 1048 /* XXX: should be replaced with a condvar */ 1049 int lfs_availsleep; 1050 /* This one replaces &lfs_nextseg... all ditto */ 1051 int lfs_nextsegsleep; 1052 #endif 1053 }; 1054 1055 /* 1056 * Structures used by lfs_bmapv and lfs_markv to communicate information 1057 * about inodes and data blocks. 1058 */ 1059 typedef struct block_info { 1060 u_int64_t bi_inode; /* inode # */ 1061 int64_t bi_lbn; /* logical block w/in file */ 1062 int64_t bi_daddr; /* disk address of block */ 1063 u_int64_t bi_segcreate; /* origin segment create time */ 1064 int bi_version; /* file version number */ 1065 int bi_size; /* size of the block (if fragment) */ 1066 void *bi_bp; /* data buffer */ 1067 } BLOCK_INFO; 1068 1069 /* Compatibility for 7.0 binaries */ 1070 typedef struct block_info_70 { 1071 u_int32_t bi_inode; /* inode # */ 1072 int32_t bi_lbn; /* logical block w/in file */ 1073 int32_t bi_daddr; /* disk address of block */ 1074 u_int64_t bi_segcreate; /* origin segment create time */ 1075 int bi_version; /* file version number */ 1076 void *bi_bp; /* data buffer */ 1077 int bi_size; /* size of the block (if fragment) */ 1078 } BLOCK_INFO_70; 1079 1080 /* Compatibility for 1.5 binaries */ 1081 typedef struct block_info_15 { 1082 u_int32_t bi_inode; /* inode # */ 1083 int32_t bi_lbn; /* logical block w/in file */ 1084 int32_t bi_daddr; /* disk address of block */ 1085 u_int32_t bi_segcreate; /* origin segment create time */ 1086 int bi_version; /* file version number */ 1087 void *bi_bp; /* data buffer */ 1088 int bi_size; /* size of the block (if fragment) */ 1089 } BLOCK_INFO_15; 1090 1091 /* 1092 * 32/64-bit-clean pointer to block pointers. This points into 1093 * already-existing storage; it is mostly used to access the block 1094 * pointers following a FINFO. 1095 */ 1096 union lfs_blocks { 1097 int64_t *b64; 1098 int32_t *b32; 1099 }; 1100 1101 /* In-memory description of a segment about to be written. */ 1102 struct segment { 1103 struct lfs *fs; /* file system pointer */ 1104 struct buf **bpp; /* pointer to buffer array */ 1105 struct buf **cbpp; /* pointer to next available bp */ 1106 struct buf **start_bpp; /* pointer to first bp in this set */ 1107 struct buf *ibp; /* buffer pointer to inode page */ 1108 union lfs_dinode *idp; /* pointer to ifile dinode */ 1109 FINFO *fip; /* current fileinfo pointer */ 1110 struct vnode *vp; /* vnode being gathered */ 1111 void *segsum; /* segment summary info */ 1112 u_int32_t ninodes; /* number of inodes in this segment */ 1113 int32_t seg_bytes_left; /* bytes left in segment */ 1114 int32_t sum_bytes_left; /* bytes left in summary block */ 1115 u_int32_t seg_number; /* number of this segment */ 1116 union lfs_blocks start_lbp; /* beginning lbn for this set */ 1117 1118 #define SEGM_CKP 0x0001 /* doing a checkpoint */ 1119 #define SEGM_CLEAN 0x0002 /* cleaner call; don't sort */ 1120 #define SEGM_SYNC 0x0004 /* wait for segment */ 1121 #define SEGM_PROT 0x0008 /* don't inactivate at segunlock */ 1122 #define SEGM_PAGEDAEMON 0x0010 /* pagedaemon called us */ 1123 #define SEGM_WRITERD 0x0020 /* LFS writed called us */ 1124 #define SEGM_FORCE_CKP 0x0040 /* Force checkpoint right away */ 1125 #define SEGM_RECLAIM 0x0080 /* Writing to reclaim vnode */ 1126 #define SEGM_SINGLE 0x0100 /* Opportunistic writevnodes */ 1127 u_int16_t seg_flags; /* run-time flags for this segment */ 1128 u_int32_t seg_iocount; /* number of ios pending */ 1129 int ndupino; /* number of duplicate inodes */ 1130 }; 1131 1132 /* Statistics Counters */ 1133 struct lfs_stats { /* Must match sysctl list in lfs_vfsops.h ! */ 1134 u_int segsused; 1135 u_int psegwrites; 1136 u_int psyncwrites; 1137 u_int pcleanwrites; 1138 u_int blocktot; 1139 u_int cleanblocks; 1140 u_int ncheckpoints; 1141 u_int nwrites; 1142 u_int nsync_writes; 1143 u_int wait_exceeded; 1144 u_int write_exceeded; 1145 u_int flush_invoked; 1146 u_int vflush_invoked; 1147 u_int clean_inlocked; 1148 u_int clean_vnlocked; 1149 u_int segs_reclaimed; 1150 }; 1151 1152 /* Fcntls to take the place of the lfs syscalls */ 1153 struct lfs_fcntl_markv { 1154 BLOCK_INFO *blkiov; /* blocks to relocate */ 1155 int blkcnt; /* number of blocks (limited to 65536) */ 1156 }; 1157 1158 #define LFCNSEGWAITALL _FCNR_FSPRIV('L', 14, struct timeval) 1159 #define LFCNSEGWAIT _FCNR_FSPRIV('L', 15, struct timeval) 1160 #define LFCNBMAPV _FCNRW_FSPRIV('L', 16, struct lfs_fcntl_markv) 1161 #define LFCNMARKV _FCNRW_FSPRIV('L', 17, struct lfs_fcntl_markv) 1162 #define LFCNRECLAIM _FCNO_FSPRIV('L', 4) 1163 1164 struct lfs_fhandle { 1165 char space[28]; /* FHANDLE_SIZE_COMPAT (but used from userland too) */ 1166 }; 1167 #define LFCNREWIND _FCNR_FSPRIV('L', 6, int) 1168 #define LFCNINVAL _FCNR_FSPRIV('L', 7, int) 1169 #define LFCNRESIZE _FCNR_FSPRIV('L', 8, int) 1170 #define LFCNWRAPSTOP _FCNR_FSPRIV('L', 9, int) 1171 #define LFCNWRAPGO _FCNR_FSPRIV('L', 10, int) 1172 #define LFCNIFILEFH _FCNW_FSPRIV('L', 11, struct lfs_fhandle) 1173 #define LFCNWRAPPASS _FCNR_FSPRIV('L', 12, int) 1174 # define LFS_WRAP_GOING 0x0 1175 # define LFS_WRAP_WAITING 0x1 1176 #define LFCNWRAPSTATUS _FCNW_FSPRIV('L', 13, int) 1177 1178 /* Debug segment lock */ 1179 #ifdef notyet 1180 # define ASSERT_SEGLOCK(fs) KASSERT(LFS_SEGLOCK_HELD(fs)) 1181 # define ASSERT_NO_SEGLOCK(fs) KASSERT(!LFS_SEGLOCK_HELD(fs)) 1182 # define ASSERT_DUNNO_SEGLOCK(fs) 1183 # define ASSERT_MAYBE_SEGLOCK(fs) 1184 #else /* !notyet */ 1185 # define ASSERT_DUNNO_SEGLOCK(fs) \ 1186 DLOG((DLOG_SEG, "lfs func %s seglock wrong (%d)\n", __func__, \ 1187 LFS_SEGLOCK_HELD(fs))) 1188 # define ASSERT_SEGLOCK(fs) do { \ 1189 if (!LFS_SEGLOCK_HELD(fs)) { \ 1190 DLOG((DLOG_SEG, "lfs func %s seglock wrong (0)\n", __func__)); \ 1191 } \ 1192 } while(0) 1193 # define ASSERT_NO_SEGLOCK(fs) do { \ 1194 if (LFS_SEGLOCK_HELD(fs)) { \ 1195 DLOG((DLOG_SEG, "lfs func %s seglock wrong (1)\n", __func__)); \ 1196 } \ 1197 } while(0) 1198 # define ASSERT_MAYBE_SEGLOCK(x) 1199 #endif /* !notyet */ 1200 1201 /* 1202 * Arguments to mount LFS filesystems 1203 */ 1204 struct ulfs_args { 1205 char *fspec; /* block special device to mount */ 1206 }; 1207 1208 __BEGIN_DECLS 1209 void lfs_itimes(struct inode *, const struct timespec *, 1210 const struct timespec *, const struct timespec *); 1211 __END_DECLS 1212 1213 #endif /* !_UFS_LFS_LFS_H_ */ 1214