1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 /* 31 * University Copyright- Copyright (c) 1982, 1986, 1988 32 * The Regents of the University of California 33 * All Rights Reserved 34 * 35 * University Acknowledgment- Portions of this document are derived from 36 * software developed by the University of California, Berkeley, and its 37 * contributors. 38 */ 39 40 #ifndef _SYS_FS_UFS_INODE_H 41 #define _SYS_FS_UFS_INODE_H 42 43 #pragma ident "%Z%%M% %I% %E% SMI" 44 45 #include <sys/isa_defs.h> 46 #include <sys/fbuf.h> 47 #include <sys/fdbuffer.h> 48 #include <sys/fcntl.h> 49 #include <sys/uio.h> 50 #include <sys/t_lock.h> 51 #include <sys/thread.h> 52 #include <sys/cred.h> 53 #include <sys/time.h> 54 #include <sys/types32.h> 55 #include <sys/fs/ufs_fs.h> 56 #include <sys/fs/ufs_lockfs.h> 57 #include <sys/fs/ufs_trans.h> 58 #include <sys/kstat.h> 59 #include <sys/fs/ufs_acl.h> 60 #include <sys/fs/ufs_panic.h> 61 #include <sys/dnlc.h> 62 63 #ifdef __cplusplus 64 extern "C" { 65 #endif 66 67 /* 68 * The I node is the focus of all local file activity in UNIX. 69 * There is a unique inode allocated for each active file, 70 * each current directory, each mounted-on file, each mapping, 71 * and the root. An inode is `named' by its dev/inumber pair. 72 * Data in icommon is read in from permanent inode on volume. 73 * 74 * Each inode has 5 locks associated with it: 75 * i_rwlock: Serializes ufs_write and ufs_setattr request 76 * and allows ufs_read requests to proceed in parallel. 77 * Serializes reads/updates to directories. 78 * vfs_dqrwlock: Manages quota sub-system quiescence. See below. 79 * i_contents: Protects almost all of the fields in the inode 80 * except for those listed below. When held 81 * in writer mode also protects those fields 82 * listed under i_tlock. 83 * i_tlock: When i_tlock is held with the i_contents reader 84 * lock the i_atime, i_mtime, i_ctime, 85 * i_delayoff, i_delaylen, i_nextrio, i_writes, i_flag 86 * i_seq, i_writer & i_mapcnt fields are protected. 87 * For more i_flag locking info see below. 88 * ih_lock: Protects inode hash chain buckets 89 * ifree_lock: Protects inode freelist 90 * 91 * Lock ordering: 92 * i_rwlock > i_contents > i_tlock 93 * i_rwlock > vfs_dqrwlock > i_contents(writer) > i_tlock 94 * i_contents > i_tlock 95 * vfs_dqrwlock > i_contents(writer) > i_tlock 96 * ih_lock > i_contents > i_tlock 97 * 98 * Making major changes to quota sub-system state, while the file 99 * system is mounted required the addition of another lock. The 100 * primary lock in the quota sub-system is vfs_dqrwlock in the ufsvfs 101 * structure. This lock is used to manage quota sub-system quiescence 102 * for a particular file system. Major changes to quota sub-system 103 * state (disabling quotas, enabling quotas, and setting new quota 104 * limits) all require the file system to be quiescent and grabbing 105 * vfs_dqrwlock as writer accomplishes this. On the other hand, 106 * grabbing vfs_dqrwlock as reader makes the quota sub-system 107 * non-quiescent and lets the quota sub-system know that now is not a 108 * good time to change major quota sub-system state. Typically 109 * vfs_dqrwlock is grabbed for reading before i_contents is grabbed for 110 * writing. However, there are cases where vfs_dqrwlock is grabbed for 111 * reading without a corresponding i_contents write grab because there 112 * is no relevant inode. There are also cases where i_contents is 113 * grabbed for writing when a vfs_dqrwlock read grab is not needed 114 * because the inode changes do not affect quotas. 115 * 116 * Unfortunately, performance considerations have required that we be more 117 * intelligent about using i_tlock when updating i_flag. Ideally, we would 118 * have simply separated out several of the bits in i_flag into their own 119 * ints to avoid problems. But, instead, we have implemented the following 120 * rules: 121 * 122 * o You can update any i_flag field while holding the writer-contents, 123 * or by holding the reader-contents AND holding i_tlock. 124 * You can only call ITIMES_NOLOCK while holding the writer-contents, 125 * or by holding the reader-contents AND holding i_tlock. 126 * 127 * o For a directory, holding the reader-rw_lock is sufficient for setting 128 * IACC. 129 * 130 * o Races with IREF are avoided by holding the reader contents lock 131 * and by holding i_tlock in ufs_rmidle, ufs_putapage, and ufs_getpage. 132 * And by holding the writer-contents in ufs_iinactive. 133 * 134 * o The callers are no longer required to handle the calls to ITIMES 135 * and ITIMES_NOLOCK. The functions that set the i_flag bits are 136 * responsible for managing those calls. The exceptions are the 137 * bmap routines. 138 * 139 * SVR4 Extended Fundamental Type (EFT) support: 140 * The inode structure has been enhanced to support 141 * 32-bit user-id, 32-bit group-id, and 32-bit device number. 142 * Standard SVR4 ufs also supports 32-bit mode field. For the reason 143 * of backward compatibility with the previous ufs disk format, 144 * 32-bit mode field is not supported. 145 * 146 * The current inode structure is 100% backward compatible with 147 * the previous inode structure if no user-id or group-id exceeds 148 * USHRT_MAX, and no major or minor number of a device number 149 * stored in an inode exceeds 255. 150 * 151 * Rules for managing i_seq: 152 * o i_seq is locked under the same rules as i_flag 153 * o The i_ctime or i_mtime MUST never change without increasing 154 * the value of i_seq. 155 * o You may increase the value of i_seq without the timestamps 156 * changing, this may decrease the callers performance but will 157 * be functionally correct. 158 * o The common case is when IUPD or ICHG is set, increase i_seq 159 * and immediately call ITIMES* or ufs_iupdat to create a new timestamp. 160 * o A less common case is the setting of IUPD or ICHG and while still 161 * holding the correct lock defer the timestamp and i_seq update 162 * until later, but it must still be done before the lock is released. 163 * bmap_write is an example of this, where the caller does the update. 164 * o If multiple changes are being made with the timestamps being 165 * updated only at the end, a single increase of i_seq is allowed. 166 * o If changes are made with IUPD or ICHG being set, but 167 * the controlling lock is being dropped before the timestamp is 168 * updated, there is a risk that another thread will also change 169 * the file, update i_flag, and push just one timestamp update. 170 * There is also the risk that another thread calls ITIMES or 171 * ufs_iupdat without setting IUPD|ICHG and thus not changing i_seq, 172 * this will cause ufs_imark to change the timestamps without changing 173 * i_seq. If the controlling lock is dropped, ISEQ must be set to 174 * force i_seq to be increased on next ufs_imark, but i_seq MUST still 175 * be increased by the original setting thread before its deferred 176 * call to ITIMES to insure it is increased the correct number of times. 177 */ 178 179 #define UID_LONG (o_uid_t)65535 180 /* flag value to indicate uid is 32-bit long */ 181 #define GID_LONG (o_uid_t)65535 182 /* flag value to indicate gid is 32-bit long */ 183 184 #define NDADDR 12 /* direct addresses in inode */ 185 #define NIADDR 3 /* indirect addresses in inode */ 186 #define FSL_SIZE (NDADDR + NIADDR - 1) * sizeof (daddr32_t) 187 /* max fast symbolic name length is 56 */ 188 189 #define i_fs i_ufsvfs->vfs_bufp->b_un.b_fs 190 #define i_vfs i_vnode->v_vfsp 191 192 struct icommon { 193 o_mode_t ic_smode; /* 0: mode and type of file */ 194 short ic_nlink; /* 2: number of links to file */ 195 o_uid_t ic_suid; /* 4: owner's user id */ 196 o_gid_t ic_sgid; /* 6: owner's group id */ 197 u_offset_t ic_lsize; /* 8: number of bytes in file */ 198 #ifdef _KERNEL 199 struct timeval32 ic_atime; /* 16: time last accessed */ 200 struct timeval32 ic_mtime; /* 24: time last modified */ 201 struct timeval32 ic_ctime; /* 32: last time inode changed */ 202 #else 203 time32_t ic_atime; /* 16: time last accessed */ 204 int32_t ic_atspare; 205 time32_t ic_mtime; /* 24: time last modified */ 206 int32_t ic_mtspare; 207 time32_t ic_ctime; /* 32: last time inode changed */ 208 int32_t ic_ctspare; 209 #endif 210 daddr32_t ic_db[NDADDR]; /* 40: disk block addresses */ 211 daddr32_t ic_ib[NIADDR]; /* 88: indirect blocks */ 212 int32_t ic_flags; /* 100: cflags */ 213 int32_t ic_blocks; /* 104: 512 byte blocks actually held */ 214 int32_t ic_gen; /* 108: generation number */ 215 int32_t ic_shadow; /* 112: shadow inode */ 216 uid_t ic_uid; /* 116: long EFT version of uid */ 217 gid_t ic_gid; /* 120: long EFT version of gid */ 218 uint32_t ic_oeftflag; /* 124: extended attr directory ino, 0 = none */ 219 }; 220 221 /* 222 * Large directories can be cached. Directory caching can take the following 223 * states: 224 */ 225 typedef enum { 226 CD_DISABLED_NOMEM = -2, 227 CD_DISABLED_TOOBIG, 228 CD_DISABLED, 229 CD_ENABLED 230 } cachedir_t; 231 232 /* 233 * Large Files: Note we use the inline functions load_double, store_double 234 * to load and store the long long values of i_size. Therefore the 235 * address of i_size must be eight byte aligned. Kmem_alloc of incore 236 * inode structure makes sure that the structure is 8-byte aligned. 237 * XX64 - reorder this structure? 238 */ 239 typedef struct inode { 240 struct inode *i_chain[2]; /* must be first */ 241 struct inode *i_freef; /* free list forward - must be before i_ic */ 242 struct inode *i_freeb; /* free list back - must be before i_ic */ 243 struct icommon i_ic; /* Must be here */ 244 struct vnode *i_vnode; /* vnode associated with this inode */ 245 struct vnode *i_devvp; /* vnode for block I/O */ 246 dev_t i_dev; /* device where inode resides */ 247 ino_t i_number; /* i number, 1-to-1 with device address */ 248 off_t i_diroff; /* offset in dir, where we found last entry */ 249 /* just a hint - no locking needed */ 250 struct ufsvfs *i_ufsvfs; /* incore fs associated with inode */ 251 struct dquot *i_dquot; /* quota structure controlling this file */ 252 krwlock_t i_rwlock; /* serializes write/setattr requests */ 253 krwlock_t i_contents; /* protects (most of) inode contents */ 254 kmutex_t i_tlock; /* protects time fields, i_flag */ 255 offset_t i_nextr; /* */ 256 /* next byte read offset (read-ahead) */ 257 /* No lock required */ 258 /* */ 259 uint_t i_flag; /* inode flags */ 260 uint_t i_seq; /* modification sequence number */ 261 cachedir_t i_cachedir; /* Cache this directory on next lookup */ 262 /* - no locking needed */ 263 long i_mapcnt; /* mappings to file pages */ 264 int *i_map; /* block list for the corresponding file */ 265 dev_t i_rdev; /* INCORE rdev from i_oldrdev by ufs_iget */ 266 size_t i_delaylen; /* delayed writes, units=bytes */ 267 offset_t i_delayoff; /* where we started delaying */ 268 offset_t i_nextrio; /* where to start the next clust */ 269 long i_writes; /* number of outstanding bytes in write q */ 270 kcondvar_t i_wrcv; /* sleep/wakeup for write throttle */ 271 offset_t i_doff; /* dinode byte offset in file system */ 272 si_t *i_ufs_acl; /* pointer to acl entry */ 273 dcanchor_t i_danchor; /* directory cache anchor */ 274 kthread_t *i_writer; /* thread which is in window in wrip() */ 275 } inode_t; 276 277 struct dinode { 278 union { 279 struct icommon di_icom; 280 char di_size[128]; 281 } di_un; 282 }; 283 284 #define i_mode i_ic.ic_smode 285 #define i_nlink i_ic.ic_nlink 286 #define i_uid i_ic.ic_uid 287 #define i_gid i_ic.ic_gid 288 #define i_smode i_ic.ic_smode 289 #define i_suid i_ic.ic_suid 290 #define i_sgid i_ic.ic_sgid 291 292 #define i_size i_ic.ic_lsize 293 #define i_db i_ic.ic_db 294 #define i_ib i_ic.ic_ib 295 296 #define i_atime i_ic.ic_atime 297 #define i_mtime i_ic.ic_mtime 298 #define i_ctime i_ic.ic_ctime 299 300 #define i_shadow i_ic.ic_shadow 301 #define i_oeftflag i_ic.ic_oeftflag 302 #define i_blocks i_ic.ic_blocks 303 #define i_cflags i_ic.ic_flags 304 #ifdef _LITTLE_ENDIAN 305 /* 306 * Originally done on x86, but carried on to all other little 307 * architectures, which provides for file system compatibility. 308 */ 309 #define i_ordev i_ic.ic_db[1] /* USL SVR4 compatibility */ 310 #else 311 #define i_ordev i_ic.ic_db[0] /* was i_oldrdev */ 312 #endif 313 #define i_gen i_ic.ic_gen 314 #define i_forw i_chain[0] 315 #define i_back i_chain[1] 316 317 /* EFT transition aids - obsolete */ 318 #define oEFT_MAGIC 0x90909090 319 #define di_oeftflag di_ic.ic_oeftflag 320 321 #define di_ic di_un.di_icom 322 #define di_mode di_ic.ic_smode 323 #define di_nlink di_ic.ic_nlink 324 #define di_uid di_ic.ic_uid 325 #define di_gid di_ic.ic_gid 326 #define di_smode di_ic.ic_smode 327 #define di_suid di_ic.ic_suid 328 #define di_sgid di_ic.ic_sgid 329 330 #define di_size di_ic.ic_lsize 331 #define di_db di_ic.ic_db 332 #define di_ib di_ic.ic_ib 333 334 #define di_atime di_ic.ic_atime 335 #define di_mtime di_ic.ic_mtime 336 #define di_ctime di_ic.ic_ctime 337 #define di_cflags di_ic.ic_flags 338 339 #ifdef _LITTLE_ENDIAN 340 #define di_ordev di_ic.ic_db[1] 341 #else 342 #define di_ordev di_ic.ic_db[0] 343 #endif 344 #define di_shadow di_ic.ic_shadow 345 #define di_blocks di_ic.ic_blocks 346 #define di_gen di_ic.ic_gen 347 348 /* flags */ 349 #define IUPD 0x0001 /* file has been modified */ 350 #define IACC 0x0002 /* inode access time to be updated */ 351 #define IMOD 0x0004 /* inode has been modified */ 352 #define ICHG 0x0008 /* inode has been changed */ 353 #define INOACC 0x0010 /* no access time update in getpage */ 354 #define IMODTIME 0x0020 /* mod time already set */ 355 #define IREF 0x0040 /* inode is being referenced */ 356 #define ISYNC 0x0080 /* do all allocation synchronously */ 357 #define IFASTSYMLNK 0x0100 /* fast symbolic link */ 358 #define IMODACC 0x0200 /* only access time changed; */ 359 /* filesystem won't become active */ 360 #define IATTCHG 0x0400 /* only size/blocks have changed */ 361 #define IBDWRITE 0x0800 /* the inode has been scheduled for */ 362 /* write operation asynchronously */ 363 #define ISTALE 0x1000 /* inode couldn't be read from disk */ 364 #define IDEL 0x2000 /* inode is being deleted */ 365 #define IDIRECTIO 0x4000 /* attempt directio */ 366 #define ISEQ 0x8000 /* deferred i_seq increase */ 367 #define IJUNKIQ 0x10000 /* on junk idle queue */ 368 #define IQUIET 0x20000 /* No file system full messages */ 369 370 /* cflags */ 371 #define IXATTR 0x0001 /* Extended attribute */ 372 373 /* modes */ 374 #define IFMT 0170000 /* type of file */ 375 #define IFIFO 0010000 /* named pipe (fifo) */ 376 #define IFCHR 0020000 /* character special */ 377 #define IFDIR 0040000 /* directory */ 378 #define IFBLK 0060000 /* block special */ 379 #define IFREG 0100000 /* regular */ 380 #define IFLNK 0120000 /* symbolic link */ 381 #define IFSHAD 0130000 /* shadow indode */ 382 #define IFSOCK 0140000 /* socket */ 383 #define IFATTRDIR 0160000 /* Attribute directory */ 384 385 #define ISUID 04000 /* set user id on execution */ 386 #define ISGID 02000 /* set group id on execution */ 387 #define ISVTX 01000 /* save swapped text even after use */ 388 #define IREAD 0400 /* read, write, execute permissions */ 389 #define IWRITE 0200 390 #define IEXEC 0100 391 392 /* specify how the inode info is written in ufs_syncip() */ 393 #define I_SYNC 1 /* wait for the inode written to disk */ 394 #define I_DSYNC 2 /* wait for the inode written to disk */ 395 /* only if IATTCHG is set */ 396 #define I_ASYNC 0 /* don't wait for the inode written */ 397 398 /* flags passed to ufs_itrunc(), indirtrunc(), and free() */ 399 #define I_FREE 0x00000001 /* inode is being freed */ 400 #define I_DIR 0x00000002 /* inode is a directory */ 401 #define I_IBLK 0x00000004 /* indirect block */ 402 #define I_CHEAP 0x00000008 /* cheap free */ 403 #define I_SHAD 0x00000010 /* inode is a shadow inode */ 404 #define I_QUOTA 0x00000020 /* quota file */ 405 #define I_NOCANCEL 0x40 /* Don't cancel these fragments */ 406 #define I_ACCT 0x00000080 /* Update ufsvfs' unreclaimed_blocks */ 407 408 /* 409 * If ufs_dircheckforname() fails to find an entry with the given name, 410 * this "slot" structure holds state for ufs_direnter_*() as to where 411 * there is space to put an entry with that name. 412 * If ufs_dircheckforname() finds an entry with the given name, this structure 413 * holds state for ufs_dirrename() and ufs_dirremove() as to where the 414 * entry is. "status" indicates what ufs_dircheckforname() found: 415 * NONE name not found, large enough free slot not found, 416 * FOUND name not found, large enough free slot found 417 * EXIST name found 418 * If ufs_dircheckforname() fails due to an error, this structure is not 419 * filled in. 420 * 421 * After ufs_dircheckforname() succeeds the values are: 422 * status offset size fbp, ep 423 * ------ ------ ---- ------- 424 * NONE end of dir needed not valid 425 * FOUND start of entry of ent both valid if fbp != NULL 426 * EXIST start of entry of prev ent valid 427 * 428 * "endoff" is set to 0 if the an entry with the given name is found, or if no 429 * free slot could be found or made; this means that the directory should not 430 * be truncated. If the entry was found, the search terminates so 431 * ufs_dircheckforname() didn't find out where the last valid entry in the 432 * directory was, so it doesn't know where to cut the directory off; if no free 433 * slot could be found or made, the directory has to be extended to make room 434 * for the new entry, so there's nothing to cut off. 435 * Otherwise, "endoff" is set to the larger of the offset of the last 436 * non-empty entry in the directory, or the offset at which the new entry will 437 * be placed, whichever is larger. This is used by ufs_diraddentry(); if a new 438 * entry is to be added to the directory, any complete directory blocks at the 439 * end of the directory that contain no non-empty entries are lopped off the 440 * end, thus shrinking the directory dynamically. 441 */ 442 typedef enum {NONE, FOUND, EXIST} slotstat_t; 443 struct slot { 444 struct direct *ep; /* pointer to slot */ 445 struct fbuf *fbp; /* dir buf where slot is */ 446 off_t offset; /* offset of area with free space */ 447 off_t endoff; /* last useful location found in search */ 448 slotstat_t status; /* status of slot */ 449 int size; /* size of area at slotoffset */ 450 int cached; /* cached directory */ 451 }; 452 453 /* 454 * Statistics on inodes 455 * Not protected by locks 456 */ 457 struct instats { 458 kstat_named_t in_size; /* current cache size */ 459 kstat_named_t in_maxsize; /* maximum cache size */ 460 kstat_named_t in_hits; /* cache hits */ 461 kstat_named_t in_misses; /* cache misses */ 462 kstat_named_t in_malloc; /* kmem_alloce'd */ 463 kstat_named_t in_mfree; /* kmem_free'd */ 464 kstat_named_t in_maxreached; /* Largest size reached by cache */ 465 kstat_named_t in_frfront; /* # put at front of freelist */ 466 kstat_named_t in_frback; /* # put at back of freelist */ 467 kstat_named_t in_qfree; /* q's to delete thread */ 468 kstat_named_t in_scan; /* # inodes scanned */ 469 kstat_named_t in_tidles; /* # inodes idled by idle thread */ 470 kstat_named_t in_lidles; /* # inodes idled by ufs_lookup */ 471 kstat_named_t in_vidles; /* # inodes idled by ufs_vget */ 472 kstat_named_t in_kcalloc; /* # inodes kmem_cache_alloced */ 473 kstat_named_t in_kcfree; /* # inodes kmem_cache_freed */ 474 kstat_named_t in_poc; /* # push-on-close's */ 475 }; 476 477 #ifdef _KERNEL 478 479 /* 480 * Extended attributes 481 */ 482 483 #define XATTR_DIR_NAME "/@/" 484 extern int ufs_ninode; /* high-water mark for inode cache */ 485 486 extern struct vnodeops *ufs_vnodeops; /* vnode operations for ufs */ 487 extern const struct fs_operation_def ufs_vnodeops_template[]; 488 489 /* 490 * Convert between inode pointers and vnode pointers 491 */ 492 #define VTOI(VP) ((struct inode *)(VP)->v_data) 493 #define ITOV(IP) ((struct vnode *)(IP)->i_vnode) 494 495 /* 496 * convert to fs 497 */ 498 #define ITOF(IP) ((struct fs *)(IP)->i_fs) 499 500 /* 501 * Convert between vnode types and inode formats 502 */ 503 extern enum vtype iftovt_tab[]; 504 505 #ifdef notneeded 506 507 /* Look at sys/mode.h and os/vnode.c */ 508 509 extern int vttoif_tab[]; 510 511 #endif 512 513 /* 514 * Mark an inode with the current (unique) timestamp. 515 * (Note that UFS's concept of time only keeps 32 bits of seconds 516 * in the on-disk format). 517 */ 518 struct timeval32 iuniqtime; 519 extern kmutex_t ufs_iuniqtime_lock; 520 521 #define ITIMES_NOLOCK(ip) ufs_itimes_nolock(ip) 522 523 #define ITIMES(ip) { \ 524 mutex_enter(&(ip)->i_tlock); \ 525 ITIMES_NOLOCK(ip); \ 526 mutex_exit(&(ip)->i_tlock); \ 527 } 528 529 /* 530 * The following interfaces are used to do atomic loads and stores 531 * of an inode's i_size, which is a long long data type. 532 * 533 * For LP64, we just to a load or a store - atomicity and alignment 534 * are 8-byte guaranteed. For x86 there are no such instructions, 535 * so we grab i_contents as reader to get the size; we already hold 536 * it as writer when we're setting the size. 537 */ 538 539 #ifdef _LP64 540 541 #define UFS_GET_ISIZE(resultp, ip) *(resultp) = (ip)->i_size 542 #define UFS_SET_ISIZE(value, ip) (ip)->i_size = (value) 543 544 #else /* _LP64 */ 545 546 #define UFS_GET_ISIZE(resultp, ip) \ 547 { \ 548 rw_enter(&(ip)->i_contents, RW_READER); \ 549 *(resultp) = (ip)->i_size; \ 550 rw_exit(&(ip)->i_contents); \ 551 } 552 #define UFS_SET_ISIZE(value, ip) \ 553 { \ 554 ASSERT(RW_WRITE_HELD(&(ip)->i_contents)); \ 555 (ip)->i_size = (value); \ 556 } 557 558 #endif /* _LP64 */ 559 560 /* 561 * Allocate the specified block in the inode 562 * and make sure any in-core pages are initialized. 563 */ 564 #define BMAPALLOC(ip, off, size, cr) \ 565 bmap_write((ip), (u_offset_t)(off), (size), 0, cr) 566 567 #define ESAME (-1) /* trying to rename linked files (special) */ 568 569 #define UFS_HOLE (daddr32_t)-1 /* value used when no block allocated */ 570 571 /* 572 * enums 573 */ 574 575 /* direnter ops */ 576 enum de_op { DE_CREATE, DE_MKDIR, DE_LINK, DE_RENAME, DE_SYMLINK, DE_ATTRDIR}; 577 578 /* dirremove ops */ 579 enum dr_op { DR_REMOVE, DR_RMDIR, DR_RENAME }; 580 581 /* 582 * This overlays the fid structure (see vfs.h) 583 * 584 * LP64 note: we use int32_t instead of ino_t since UFS does not use 585 * inode numbers larger than 32-bits and ufid's are passed to NFS 586 * which expects them to not grow in size beyond 10 bytes (12 including 587 * the length). 588 */ 589 struct ufid { 590 ushort_t ufid_len; 591 ushort_t ufid_flags; 592 int32_t ufid_ino; 593 int32_t ufid_gen; 594 }; 595 596 /* 597 * each ufs thread (see ufs_thread.c) is managed by this struct 598 */ 599 struct ufs_q { 600 union uq_head { 601 void *_uq_generic; /* first entry on q */ 602 struct inode *_uq_i; 603 ufs_failure_t *_uq_uf; 604 } _uq_head; 605 int uq_ne; /* # of entries/failures found */ 606 int uq_lowat; /* thread runs when ne == lowat */ 607 int uq_hiwat; /* synchronous idle if ne >= hiwat */ 608 ushort_t uq_flags; /* flags (see below) */ 609 kcondvar_t uq_cv; /* for sleep/wakeup */ 610 kthread_id_t uq_threadp; /* thread managing this q */ 611 kmutex_t uq_mutex; /* protects this struct */ 612 }; 613 614 #define uq_head _uq_head._uq_generic 615 #define uq_ihead _uq_head._uq_i 616 #define uq_ufhead _uq_head._uq_uf 617 618 /* 619 * uq_flags 620 */ 621 #define UQ_EXIT (0x0001) /* q server exits at its convenience */ 622 #define UQ_WAIT (0x0002) /* thread is waiting on q server */ 623 #define UQ_SUSPEND (0x0004) /* request for suspension */ 624 #define UQ_SUSPENDED (0x0008) /* thread has suspended itself */ 625 #define UQ_FASTCLIENTS (0x0010) /* fast clients in ufs_delq_info */ 626 627 /* 628 * When logging is enabled, statvfs must account for blocks and files that 629 * may be on the delete queue. Protected by ufsvfsp->vfs_delete.uq_mutex 630 */ 631 struct ufs_delq_info { 632 kcondvar_t delq_fast_cv; /* for fast-operating clients */ 633 u_offset_t delq_unreclaimed_blocks; 634 ulong_t delq_unreclaimed_files; 635 }; 636 637 638 /* 639 * global idle queues 640 * The queues are sized dynamically in proportion to ufs_ninode 641 * which, unless overridden, scales with the amount of memory. 642 * The idle queue is halved whenever it hits the low water mark 643 * (1/4 of ufs_ninode), but can burst to sizes much larger. The number 644 * of hash queues is currently maintained to give on average IQHASHQLEN 645 * entries when the idle queue is at the low water mark. 646 * Note, we do not need to search along the hash queues, but use them 647 * in order to batch together geographically local inodes to allow 648 * their updates (via the log or buffer cache) to require less disk seeks. 649 * This gives an incredible performance boost for logging and a boost for 650 * non logging file systems. 651 */ 652 typedef struct { 653 inode_t *i_chain[2]; /* must match inode_t, but unused */ 654 inode_t *i_freef; /* must match inode_t, idle list forward */ 655 inode_t *i_freeb; /* must match inode_t, idle list back */ 656 } iqhead_t; 657 658 extern struct ufs_q ufs_idle_q; /* used by global ufs idle thread */ 659 extern iqhead_t *ufs_junk_iq; /* junk idle queues */ 660 extern iqhead_t *ufs_useful_iq; /* useful idle queues */ 661 extern int ufs_njunk_iq; /* number of entries in junk iq */ 662 extern int ufs_nuseful_iq; /* number of entries in useful iq */ 663 extern int ufs_niqhash; /* number of iq hash qs - power of 2 */ 664 extern int ufs_iqhashmask; /* iq hash mask = ufs_niqhash - 1 */ 665 666 #define IQHASHQLEN 32 /* see comments above */ 667 #define INOCGSHIFT 7 /* 128 inodes per cylinder group */ 668 #define IQHASH(ip) (((ip)->i_number >> INOCGSHIFT) & ufs_iqhashmask) 669 #define IQNEXT(i) ((i) + 1) & ufs_iqhashmask /* next idle queue */ 670 671 extern struct ufs_q ufs_hlock; /* used by global ufs hlock thread */ 672 673 /* 674 * vfs_lfflags flags 675 */ 676 #define UFS_LARGEFILES ((ushort_t)0x1) /* set if mount allows largefiles */ 677 678 /* 679 * vfs_dfritime flags 680 */ 681 #define UFS_DFRATIME 0x1 /* deferred access time */ 682 683 /* 684 * UFS VFS private data. 685 * 686 * UFS file system instances may be linked on several lists. 687 * 688 * - The vfs_next field chains together every extant ufs instance; this 689 * list is rooted at ufs_instances and should be used in preference to 690 * the overall vfs list (which is properly the province of the generic 691 * file system code, not of file system implementations). This same list 692 * link is used during forcible unmounts to chain together instances that 693 * can't yet be completely dismantled, 694 * 695 * - The vfs_wnext field is used within ufs_update to form a work list of 696 * UFS instances to be synced out. 697 */ 698 typedef struct ufsvfs { 699 struct vfs *vfs_vfs; /* back link */ 700 struct ufsvfs *vfs_next; /* instance list link */ 701 struct ufsvfs *vfs_wnext; /* work list link */ 702 struct vnode *vfs_root; /* root vnode */ 703 struct buf *vfs_bufp; /* buffer containing superblock */ 704 struct vnode *vfs_devvp; /* block device vnode */ 705 ushort_t vfs_lfflags; /* Large files (set by mount) */ 706 ushort_t vfs_qflags; /* QUOTA: filesystem flags */ 707 struct inode *vfs_qinod; /* QUOTA: pointer to quota file */ 708 uint_t vfs_btimelimit; /* QUOTA: block time limit */ 709 uint_t vfs_ftimelimit; /* QUOTA: file time limit */ 710 krwlock_t vfs_dqrwlock; /* QUOTA: protects quota fields */ 711 /* 712 * some fs local threads 713 */ 714 struct ufs_q vfs_delete; /* delayed inode delete */ 715 struct ufs_q vfs_reclaim; /* reclaim open, deleted files */ 716 717 /* 718 * This is copied from the super block at mount time. 719 */ 720 int vfs_nrpos; /* # rotational positions */ 721 /* 722 * This lock protects cg's and super block pointed at by 723 * vfs_bufp->b_fs. Locks contents of fs and cg's and contents 724 * of vfs_dio. 725 */ 726 kmutex_t vfs_lock; 727 struct ulockfs vfs_ulockfs; /* ufs lockfs support */ 728 uint_t vfs_dio; /* delayed io (_FIODIO) */ 729 uint_t vfs_nointr; /* disallow lockfs interrupts */ 730 uint_t vfs_nosetsec; /* disallow ufs_setsecattr */ 731 uint_t vfs_syncdir; /* synchronous local directory ops */ 732 uint_t vfs_dontblock; /* don't block on forced umount */ 733 734 /* 735 * trans (logging ufs) stuff 736 */ 737 uint_t vfs_domatamap; /* set if matamap enabled */ 738 ulong_t vfs_maxacl; /* transaction stuff - max acl size */ 739 ulong_t vfs_dirsize; /* logspace for directory creation */ 740 ulong_t vfs_avgbfree; /* average free blks in cg (blkpref) */ 741 /* 742 * Some useful constants 743 */ 744 int vfs_nindirshift; /* calc. from fs_nindir */ 745 int vfs_nindiroffset; /* calc. from fs_ninidr */ 746 int vfs_ioclustsz; /* bytes in read/write cluster */ 747 int vfs_iotransz; /* max device i/o transfer size */ 748 749 vfs_ufsfx_t vfs_fsfx; /* lock/fix-on-panic support */ 750 /* 751 * More useful constants 752 */ 753 int vfs_minfrags; /* calc. from fs_minfree */ 754 /* 755 * Force DirectIO on all files 756 */ 757 uint_t vfs_forcedirectio; 758 /* 759 * Deferred inode time related fields 760 */ 761 clock_t vfs_iotstamp; /* last I/O timestamp */ 762 uint_t vfs_dfritime; /* deferred inode time flags */ 763 /* 764 * Some more useful info 765 */ 766 dev_t vfs_dev; /* device mounted from */ 767 struct ml_unit *vfs_log; /* pointer to embedded log struct */ 768 uint_t vfs_noatime; /* disable inode atime updates */ 769 /* 770 * snapshot stuff 771 */ 772 void *vfs_snapshot; /* snapshot handle */ 773 /* 774 * Controls logging "file system full" messages to messages file 775 */ 776 clock_t vfs_lastwhinetime; 777 778 int vfs_nolog_si; /* not logging summary info */ 779 int vfs_validfs; /* indicates mounted fs */ 780 781 /* 782 * Additional information about vfs_delete above 783 */ 784 struct ufs_delq_info vfs_delete_info; /* what's on the delete queue */ 785 } ufsvfs_t; 786 787 #define vfs_fs vfs_bufp->b_un.b_fs 788 789 /* 790 * values for vfs_validfs 791 */ 792 #define UT_UNMOUNTED 0 793 #define UT_MOUNTED 1 794 #define UT_HLOCKING 2 795 796 /* inohsz is guaranteed to be a power of 2 */ 797 #define INOHASH(ino) (((int)ino) & (inohsz - 1)) 798 799 union ihead { 800 union ihead *ih_head[2]; 801 struct inode *ih_chain[2]; 802 }; 803 804 extern union ihead *ihead; 805 extern kmutex_t *ih_lock; 806 extern int *ih_ne; 807 extern int inohsz; 808 809 extern clock_t ufs_iowait; 810 811 #endif /* _KERNEL */ 812 813 /* 814 * ufs function prototypes 815 */ 816 #if defined(_KERNEL) && !defined(_BOOT) 817 818 extern void ufs_iinit(void); 819 extern int ufs_iget(struct vfs *, ino_t, struct inode **, cred_t *); 820 extern int ufs_iget_alloced(struct vfs *, ino_t, struct inode **, 821 cred_t *); 822 extern void ufs_reset_vnode(vnode_t *); 823 extern void ufs_iinactive(struct inode *); 824 extern void ufs_iupdat(struct inode *, int); 825 extern int ufs_rmidle(struct inode *); 826 extern int ufs_itrunc(struct inode *, u_offset_t, int, cred_t *); 827 extern int ufs_iaccess(void *, int, cred_t *); 828 extern int rdip(struct inode *, struct uio *, int, struct cred *); 829 extern int wrip(struct inode *, struct uio *, int, struct cred *); 830 831 extern void ufs_imark(struct inode *); 832 extern void ufs_itimes_nolock(struct inode *); 833 834 extern int ufs_dirlook(struct inode *, char *, struct inode **, 835 cred_t *, int); 836 extern int ufs_direnter_cm(struct inode *, char *, enum de_op, 837 struct vattr *, struct inode **, cred_t *, int); 838 extern int ufs_direnter_lr(struct inode *, char *, enum de_op, 839 struct inode *, struct inode *, cred_t *, vnode_t **); 840 extern int ufs_dircheckpath(ino_t, struct inode *, struct inode *, 841 struct cred *); 842 extern int ufs_dirmakeinode(struct inode *, struct inode **, 843 struct vattr *, enum de_op, cred_t *); 844 extern int ufs_dirremove(struct inode *, char *, struct inode *, 845 vnode_t *, enum dr_op, cred_t *, vnode_t **); 846 extern int ufs_dircheckforname(struct inode *, char *, int, struct slot *, 847 struct inode **, struct cred *, int); 848 extern int ufs_xattrdirempty(struct inode *, ino_t, cred_t *); 849 extern int blkatoff(struct inode *, off_t, char **, struct fbuf **); 850 851 extern void sbupdate(struct vfs *); 852 853 extern int ufs_ialloc(struct inode *, ino_t, mode_t, struct inode **, 854 cred_t *); 855 extern void ufs_ifree(struct inode *, ino_t, mode_t); 856 extern void free(struct inode *, daddr_t, off_t, int); 857 extern int alloc(struct inode *, daddr_t, int, daddr_t *, cred_t *); 858 extern int realloccg(struct inode *, daddr_t, daddr_t, int, int, 859 daddr_t *, cred_t *); 860 extern int ufs_freesp(struct vnode *, struct flock64 *, int, cred_t *); 861 extern ino_t dirpref(inode_t *); 862 extern daddr_t blkpref(struct inode *, daddr_t, int, daddr32_t *); 863 extern daddr_t contigpref(ufsvfs_t *, size_t); 864 865 extern int ufs_rdwri(enum uio_rw, int, struct inode *, caddr_t, ssize_t, 866 offset_t, enum uio_seg, int *, cred_t *); 867 868 extern int bmap_read(struct inode *, u_offset_t, daddr_t *, int *); 869 extern int bmap_write(struct inode *, u_offset_t, int, int, struct cred *); 870 extern int bmap_has_holes(struct inode *); 871 extern int bmap_find(struct inode *, boolean_t, u_offset_t *); 872 873 extern void ufs_vfs_add(struct ufsvfs *); 874 extern void ufs_vfs_remove(struct ufsvfs *); 875 876 extern void ufs_sbwrite(struct ufsvfs *); 877 extern void ufs_update(int); 878 extern int ufs_getsummaryinfo(dev_t, struct ufsvfs *, struct fs *); 879 extern int ufs_putsummaryinfo(dev_t, struct ufsvfs *, struct fs *); 880 extern int ufs_syncip(struct inode *, int, int, top_t); 881 extern int ufs_sync_indir(struct inode *); 882 extern int ufs_indirblk_sync(struct inode *, offset_t); 883 extern int ufs_badblock(struct inode *, daddr_t); 884 extern int ufs_indir_badblock(struct inode *, daddr32_t *); 885 extern void ufs_notclean(struct ufsvfs *); 886 extern void ufs_checkclean(struct vfs *); 887 extern int isblock(struct fs *, uchar_t *, daddr_t); 888 extern void setblock(struct fs *, uchar_t *, daddr_t); 889 extern void clrblock(struct fs *, uchar_t *, daddr_t); 890 extern int isclrblock(struct fs *, uchar_t *, daddr_t); 891 extern void fragacct(struct fs *, int, int32_t *, int); 892 extern int skpc(char, uint_t, char *); 893 extern int ufs_fbwrite(struct fbuf *, struct inode *); 894 extern int ufs_fbiwrite(struct fbuf *, struct inode *, daddr_t, long); 895 extern int ufs_putapage(struct vnode *, struct page *, u_offset_t *, 896 size_t *, int, struct cred *); 897 extern inode_t *ufs_alloc_inode(ufsvfs_t *, ino_t); 898 extern void ufs_free_inode(inode_t *); 899 900 /* 901 * special stuff 902 */ 903 extern void ufs_setreclaim(struct inode *); 904 extern int ufs_scan_inodes(int, int (*)(struct inode *, void *), void *, 905 struct ufsvfs *); 906 extern int ufs_sync_inode(struct inode *, void *); 907 extern int ufs_sticky_remove_access(struct inode *, struct inode *, 908 struct cred *); 909 /* 910 * quota 911 */ 912 extern int chkiq(struct ufsvfs *, int, struct inode *, uid_t, int, 913 struct cred *, char **errp, size_t *lenp); 914 915 /* 916 * ufs thread stuff 917 */ 918 extern void ufs_thread_delete(struct vfs *); 919 extern void ufs_delete_drain(struct vfs *, int, int); 920 extern void ufs_delete(struct ufsvfs *, struct inode *, int); 921 extern void ufs_inode_cache_reclaim(void *); 922 extern void ufs_idle_drain(struct vfs *); 923 extern void ufs_idle_some(int); 924 extern void ufs_thread_idle(void); 925 extern void ufs_thread_reclaim(struct vfs *); 926 extern void ufs_thread_init(struct ufs_q *, int); 927 extern void ufs_thread_start(struct ufs_q *, void (*)(), struct vfs *); 928 extern void ufs_thread_exit(struct ufs_q *); 929 extern void ufs_thread_suspend(struct ufs_q *); 930 extern void ufs_thread_continue(struct ufs_q *); 931 extern void ufs_thread_hlock(void *); 932 extern void ufs_delete_init(struct ufsvfs *, int); 933 extern void ufs_delete_adjust_stats(struct ufsvfs *, struct statvfs64 *); 934 extern void ufs_delete_drain_wait(struct ufsvfs *, int); 935 936 /* 937 * ufs lockfs stuff 938 */ 939 struct seg; 940 extern int ufs_reconcile_fs(struct vfs *, struct ufsvfs *, int); 941 extern int ufs_quiesce(struct ulockfs *); 942 extern int ufs_flush(struct vfs *); 943 extern int ufs_fiolfs(struct vnode *, struct lockfs *, int); 944 extern int ufs__fiolfs(struct vnode *, struct lockfs *, int, int); 945 extern int ufs_fiolfss(struct vnode *, struct lockfs *); 946 extern int ufs_fioffs(struct vnode *, char *, struct cred *); 947 extern int ufs_check_lockfs(struct ufsvfs *, struct ulockfs *, ulong_t); 948 extern int ufs_lockfs_begin(struct ufsvfs *, struct ulockfs **, ulong_t); 949 extern int ufs_lockfs_begin_getpage(struct ufsvfs *, struct ulockfs **, 950 struct seg *, int, uint_t *); 951 extern void ufs_lockfs_end(struct ulockfs *); 952 /* 953 * ufs acl stuff 954 */ 955 extern int ufs_si_inherit(struct inode *, struct inode *, o_mode_t, cred_t *); 956 extern void si_cache_init(void); 957 extern int ufs_si_load(struct inode *, cred_t *); 958 extern void ufs_si_del(struct inode *); 959 extern int ufs_acl_access(struct inode *, int, cred_t *); 960 extern void ufs_si_cache_flush(dev_t); 961 extern int ufs_si_free(si_t *, struct vfs *, cred_t *); 962 extern int ufs_acl_setattr(struct inode *, struct vattr *, cred_t *); 963 extern int ufs_acl_get(struct inode *, vsecattr_t *, int, cred_t *); 964 extern int ufs_acl_set(struct inode *, vsecattr_t *, int, cred_t *); 965 /* 966 * ufs directio stuff 967 */ 968 extern void ufs_directio_init(); 969 extern int ufs_directio_write(struct inode *, uio_t *, int, int, cred_t *, 970 int *); 971 extern int ufs_directio_read(struct inode *, uio_t *, cred_t *, int *); 972 #define DIRECTIO_FAILURE (0) 973 #define DIRECTIO_SUCCESS (1) 974 975 /* 976 * ufs extensions for PXFS 977 */ 978 979 int ufs_rdwr_data(vnode_t *vp, u_offset_t offset, size_t len, fdbuffer_t *fdb, 980 int flags, cred_t *cr); 981 int ufs_alloc_data(vnode_t *vp, u_offset_t offset, size_t *len, fdbuffer_t *fdb, 982 int flags, cred_t *cr); 983 984 /* 985 * prototypes to support the forced unmount 986 */ 987 988 void ufs_freeze(struct ulockfs *, struct lockfs *); 989 int ufs_thaw(struct vfs *, struct ufsvfs *, struct ulockfs *); 990 991 /* 992 * extended attributes 993 */ 994 995 int ufs_xattrmkdir(inode_t *, inode_t **, int, struct cred *); 996 int ufs_xattr_getattrdir(vnode_t *, inode_t **, int, struct cred *); 997 void ufs_unhook_shadow(inode_t *, inode_t *); 998 999 #endif /* defined(_KERNEL) && !defined(_BOOT) */ 1000 1001 #ifdef __cplusplus 1002 } 1003 #endif 1004 1005 #endif /* _SYS_FS_UFS_INODE_H */ 1006