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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 27 /* All Rights Reserved */ 28 29 /* 30 * University Copyright- Copyright (c) 1982, 1986, 1988 31 * The Regents of the University of California 32 * All Rights Reserved 33 * 34 * University Acknowledgment- Portions of this document are derived from 35 * software developed by the University of California, Berkeley, and its 36 * contributors. 37 */ 38 39 #ifndef _SYS_FS_UFS_INODE_H 40 #define _SYS_FS_UFS_INODE_H 41 42 #pragma ident "%Z%%M% %I% %E% SMI" 43 44 #include <sys/isa_defs.h> 45 #include <sys/fbuf.h> 46 #include <sys/fdbuffer.h> 47 #include <sys/fcntl.h> 48 #include <sys/uio.h> 49 #include <sys/t_lock.h> 50 #include <sys/thread.h> 51 #include <sys/cred.h> 52 #include <sys/time.h> 53 #include <sys/types32.h> 54 #include <sys/fs/ufs_fs.h> 55 #include <sys/fs/ufs_lockfs.h> 56 #include <sys/fs/ufs_trans.h> 57 #include <sys/kstat.h> 58 #include <sys/fs/ufs_acl.h> 59 #include <sys/fs/ufs_panic.h> 60 #include <sys/dnlc.h> 61 62 #ifdef __cplusplus 63 extern "C" { 64 #endif 65 66 /* 67 * The I node is the focus of all local file activity in UNIX. 68 * There is a unique inode allocated for each active file, 69 * each current directory, each mounted-on file, each mapping, 70 * and the root. An inode is `named' by its dev/inumber pair. 71 * Data in icommon is read in from permanent inode on volume. 72 * 73 * Each inode has 5 locks associated with it: 74 * i_rwlock: Serializes ufs_write and ufs_setattr request 75 * and allows ufs_read requests to proceed in parallel. 76 * Serializes reads/updates to directories. 77 * vfs_dqrwlock: Manages quota sub-system quiescence. See below. 78 * i_contents: Protects almost all of the fields in the inode 79 * except for those listed below. When held 80 * in writer mode also protects those fields 81 * listed under i_tlock. 82 * i_tlock: When i_tlock is held with the i_contents reader 83 * lock the i_atime, i_mtime, i_ctime, 84 * i_delayoff, i_delaylen, i_nextrio, i_writes, i_flag 85 * i_seq, i_writer & i_mapcnt fields are protected. 86 * For more i_flag locking info see below. 87 * ih_lock: Protects inode hash chain buckets 88 * ifree_lock: Protects inode freelist 89 * 90 * Lock ordering: 91 * i_rwlock > i_contents > i_tlock 92 * i_rwlock > vfs_dqrwlock > i_contents(writer) > i_tlock 93 * i_contents > i_tlock 94 * vfs_dqrwlock > i_contents(writer) > i_tlock 95 * ih_lock > i_contents > i_tlock 96 * 97 * Making major changes to quota sub-system state, while the file 98 * system is mounted required the addition of another lock. The 99 * primary lock in the quota sub-system is vfs_dqrwlock in the ufsvfs 100 * structure. This lock is used to manage quota sub-system quiescence 101 * for a particular file system. Major changes to quota sub-system 102 * state (disabling quotas, enabling quotas, and setting new quota 103 * limits) all require the file system to be quiescent and grabbing 104 * vfs_dqrwlock as writer accomplishes this. On the other hand, 105 * grabbing vfs_dqrwlock as reader makes the quota sub-system 106 * non-quiescent and lets the quota sub-system know that now is not a 107 * good time to change major quota sub-system state. Typically 108 * vfs_dqrwlock is grabbed for reading before i_contents is grabbed for 109 * writing. However, there are cases where vfs_dqrwlock is grabbed for 110 * reading without a corresponding i_contents write grab because there 111 * is no relevant inode. There are also cases where i_contents is 112 * grabbed for writing when a vfs_dqrwlock read grab is not needed 113 * because the inode changes do not affect quotas. 114 * 115 * Unfortunately, performance considerations have required that we be more 116 * intelligent about using i_tlock when updating i_flag. Ideally, we would 117 * have simply separated out several of the bits in i_flag into their own 118 * ints to avoid problems. But, instead, we have implemented the following 119 * rules: 120 * 121 * o You can update any i_flag field while holding the writer-contents, 122 * or by holding the reader-contents AND holding i_tlock. 123 * You can only call ITIMES_NOLOCK while holding the writer-contents, 124 * or by holding the reader-contents AND holding i_tlock. 125 * 126 * o For a directory, holding the reader-rw_lock is sufficient for setting 127 * IACC. 128 * 129 * o Races with IREF are avoided by holding the reader contents lock 130 * and by holding i_tlock in ufs_rmidle, ufs_putapage, and ufs_getpage. 131 * And by holding the writer-contents in ufs_iinactive. 132 * 133 * o The callers are no longer required to handle the calls to ITIMES 134 * and ITIMES_NOLOCK. The functions that set the i_flag bits are 135 * responsible for managing those calls. The exceptions are the 136 * bmap routines. 137 * 138 * SVR4 Extended Fundamental Type (EFT) support: 139 * The inode structure has been enhanced to support 140 * 32-bit user-id, 32-bit group-id, and 32-bit device number. 141 * Standard SVR4 ufs also supports 32-bit mode field. For the reason 142 * of backward compatibility with the previous ufs disk format, 143 * 32-bit mode field is not supported. 144 * 145 * The current inode structure is 100% backward compatible with 146 * the previous inode structure if no user-id or group-id exceeds 147 * USHRT_MAX, and no major or minor number of a device number 148 * stored in an inode exceeds 255. 149 * 150 * Rules for managing i_seq: 151 * o i_seq is locked under the same rules as i_flag 152 * o The i_ctime or i_mtime MUST never change without increasing 153 * the value of i_seq. 154 * o You may increase the value of i_seq without the timestamps 155 * changing, this may decrease the callers performance but will 156 * be functionally correct. 157 * o The common case is when IUPD or ICHG is set, increase i_seq 158 * and immediately call ITIMES* or ufs_iupdat to create a new timestamp. 159 * o A less common case is the setting of IUPD or ICHG and while still 160 * holding the correct lock defer the timestamp and i_seq update 161 * until later, but it must still be done before the lock is released. 162 * bmap_write is an example of this, where the caller does the update. 163 * o If multiple changes are being made with the timestamps being 164 * updated only at the end, a single increase of i_seq is allowed. 165 * o If changes are made with IUPD or ICHG being set, but 166 * the controlling lock is being dropped before the timestamp is 167 * updated, there is a risk that another thread will also change 168 * the file, update i_flag, and push just one timestamp update. 169 * There is also the risk that another thread calls ITIMES or 170 * ufs_iupdat without setting IUPD|ICHG and thus not changing i_seq, 171 * this will cause ufs_imark to change the timestamps without changing 172 * i_seq. If the controlling lock is dropped, ISEQ must be set to 173 * force i_seq to be increased on next ufs_imark, but i_seq MUST still 174 * be increased by the original setting thread before its deferred 175 * call to ITIMES to insure it is increased the correct number of times. 176 */ 177 178 #define UID_LONG (o_uid_t)65535 179 /* flag value to indicate uid is 32-bit long */ 180 #define GID_LONG (o_uid_t)65535 181 /* flag value to indicate gid is 32-bit long */ 182 183 #define NDADDR 12 /* direct addresses in inode */ 184 #define NIADDR 3 /* indirect addresses in inode */ 185 #define FSL_SIZE (NDADDR + NIADDR - 1) * sizeof (daddr32_t) 186 /* max fast symbolic name length is 56 */ 187 188 #define i_fs i_ufsvfs->vfs_bufp->b_un.b_fs 189 #define i_vfs i_vnode->v_vfsp 190 191 struct icommon { 192 o_mode_t ic_smode; /* 0: mode and type of file */ 193 short ic_nlink; /* 2: number of links to file */ 194 o_uid_t ic_suid; /* 4: owner's user id */ 195 o_gid_t ic_sgid; /* 6: owner's group id */ 196 u_offset_t ic_lsize; /* 8: number of bytes in file */ 197 #ifdef _KERNEL 198 struct timeval32 ic_atime; /* 16: time last accessed */ 199 struct timeval32 ic_mtime; /* 24: time last modified */ 200 struct timeval32 ic_ctime; /* 32: last time inode changed */ 201 #else 202 time32_t ic_atime; /* 16: time last accessed */ 203 int32_t ic_atspare; 204 time32_t ic_mtime; /* 24: time last modified */ 205 int32_t ic_mtspare; 206 time32_t ic_ctime; /* 32: last time inode changed */ 207 int32_t ic_ctspare; 208 #endif 209 daddr32_t ic_db[NDADDR]; /* 40: disk block addresses */ 210 daddr32_t ic_ib[NIADDR]; /* 88: indirect blocks */ 211 int32_t ic_flags; /* 100: cflags */ 212 int32_t ic_blocks; /* 104: 512 byte blocks actually held */ 213 int32_t ic_gen; /* 108: generation number */ 214 int32_t ic_shadow; /* 112: shadow inode */ 215 uid_t ic_uid; /* 116: long EFT version of uid */ 216 gid_t ic_gid; /* 120: long EFT version of gid */ 217 uint32_t ic_oeftflag; /* 124: extended attr directory ino, 0 = none */ 218 }; 219 220 /* 221 * Large directories can be cached. Directory caching can take the following 222 * states: 223 */ 224 typedef enum { 225 CD_DISABLED_NOMEM = -2, 226 CD_DISABLED_TOOBIG, 227 CD_DISABLED, 228 CD_ENABLED 229 } cachedir_t; 230 231 /* 232 * Large Files: Note we use the inline functions load_double, store_double 233 * to load and store the long long values of i_size. Therefore the 234 * address of i_size must be eight byte aligned. Kmem_alloc of incore 235 * inode structure makes sure that the structure is 8-byte aligned. 236 * XX64 - reorder this structure? 237 */ 238 typedef struct inode { 239 struct inode *i_chain[2]; /* must be first */ 240 struct inode *i_freef; /* free list forward - must be before i_ic */ 241 struct inode *i_freeb; /* free list back - must be before i_ic */ 242 struct icommon i_ic; /* Must be here */ 243 struct vnode *i_vnode; /* vnode associated with this inode */ 244 struct vnode *i_devvp; /* vnode for block I/O */ 245 dev_t i_dev; /* device where inode resides */ 246 ino_t i_number; /* i number, 1-to-1 with device address */ 247 off_t i_diroff; /* offset in dir, where we found last entry */ 248 /* just a hint - no locking needed */ 249 struct ufsvfs *i_ufsvfs; /* incore fs associated with inode */ 250 struct dquot *i_dquot; /* quota structure controlling this file */ 251 krwlock_t i_rwlock; /* serializes write/setattr requests */ 252 krwlock_t i_contents; /* protects (most of) inode contents */ 253 kmutex_t i_tlock; /* protects time fields, i_flag */ 254 offset_t i_nextr; /* */ 255 /* next byte read offset (read-ahead) */ 256 /* No lock required */ 257 /* */ 258 uint_t i_flag; /* inode flags */ 259 uint_t i_seq; /* modification sequence number */ 260 cachedir_t i_cachedir; /* Cache this directory on next lookup */ 261 /* - no locking needed */ 262 long i_mapcnt; /* mappings to file pages */ 263 int *i_map; /* block list for the corresponding file */ 264 dev_t i_rdev; /* INCORE rdev from i_oldrdev by ufs_iget */ 265 size_t i_delaylen; /* delayed writes, units=bytes */ 266 offset_t i_delayoff; /* where we started delaying */ 267 offset_t i_nextrio; /* where to start the next clust */ 268 long i_writes; /* number of outstanding bytes in write q */ 269 kcondvar_t i_wrcv; /* sleep/wakeup for write throttle */ 270 offset_t i_doff; /* dinode byte offset in file system */ 271 si_t *i_ufs_acl; /* pointer to acl entry */ 272 dcanchor_t i_danchor; /* directory cache anchor */ 273 kthread_t *i_writer; /* thread which is in window in wrip() */ 274 } inode_t; 275 276 struct dinode { 277 union { 278 struct icommon di_icom; 279 char di_size[128]; 280 } di_un; 281 }; 282 283 #define i_mode i_ic.ic_smode 284 #define i_nlink i_ic.ic_nlink 285 #define i_uid i_ic.ic_uid 286 #define i_gid i_ic.ic_gid 287 #define i_smode i_ic.ic_smode 288 #define i_suid i_ic.ic_suid 289 #define i_sgid i_ic.ic_sgid 290 291 #define i_size i_ic.ic_lsize 292 #define i_db i_ic.ic_db 293 #define i_ib i_ic.ic_ib 294 295 #define i_atime i_ic.ic_atime 296 #define i_mtime i_ic.ic_mtime 297 #define i_ctime i_ic.ic_ctime 298 299 #define i_shadow i_ic.ic_shadow 300 #define i_oeftflag i_ic.ic_oeftflag 301 #define i_blocks i_ic.ic_blocks 302 #define i_cflags i_ic.ic_flags 303 #ifdef _LITTLE_ENDIAN 304 /* 305 * Originally done on x86, but carried on to all other little 306 * architectures, which provides for file system compatibility. 307 */ 308 #define i_ordev i_ic.ic_db[1] /* USL SVR4 compatibility */ 309 #else 310 #define i_ordev i_ic.ic_db[0] /* was i_oldrdev */ 311 #endif 312 #define i_gen i_ic.ic_gen 313 #define i_forw i_chain[0] 314 #define i_back i_chain[1] 315 316 /* EFT transition aids - obsolete */ 317 #define oEFT_MAGIC 0x90909090 318 #define di_oeftflag di_ic.ic_oeftflag 319 320 #define di_ic di_un.di_icom 321 #define di_mode di_ic.ic_smode 322 #define di_nlink di_ic.ic_nlink 323 #define di_uid di_ic.ic_uid 324 #define di_gid di_ic.ic_gid 325 #define di_smode di_ic.ic_smode 326 #define di_suid di_ic.ic_suid 327 #define di_sgid di_ic.ic_sgid 328 329 #define di_size di_ic.ic_lsize 330 #define di_db di_ic.ic_db 331 #define di_ib di_ic.ic_ib 332 333 #define di_atime di_ic.ic_atime 334 #define di_mtime di_ic.ic_mtime 335 #define di_ctime di_ic.ic_ctime 336 #define di_cflags di_ic.ic_flags 337 338 #ifdef _LITTLE_ENDIAN 339 #define di_ordev di_ic.ic_db[1] 340 #else 341 #define di_ordev di_ic.ic_db[0] 342 #endif 343 #define di_shadow di_ic.ic_shadow 344 #define di_blocks di_ic.ic_blocks 345 #define di_gen di_ic.ic_gen 346 347 /* flags */ 348 #define IUPD 0x0001 /* file has been modified */ 349 #define IACC 0x0002 /* inode access time to be updated */ 350 #define IMOD 0x0004 /* inode has been modified */ 351 #define ICHG 0x0008 /* inode has been changed */ 352 #define INOACC 0x0010 /* no access time update in getpage */ 353 #define IMODTIME 0x0020 /* mod time already set */ 354 #define IREF 0x0040 /* inode is being referenced */ 355 #define ISYNC 0x0080 /* do all allocation synchronously */ 356 #define IFASTSYMLNK 0x0100 /* fast symbolic link */ 357 #define IMODACC 0x0200 /* only access time changed; */ 358 /* filesystem won't become active */ 359 #define IATTCHG 0x0400 /* only size/blocks have changed */ 360 #define IBDWRITE 0x0800 /* the inode has been scheduled for */ 361 /* write operation asynchronously */ 362 #define ISTALE 0x1000 /* inode couldn't be read from disk */ 363 #define IDEL 0x2000 /* inode is being deleted */ 364 #define IDIRECTIO 0x4000 /* attempt directio */ 365 #define ISEQ 0x8000 /* deferred i_seq increase */ 366 #define IJUNKIQ 0x10000 /* on junk idle queue */ 367 #define IQUIET 0x20000 /* No file system full messages */ 368 369 /* cflags */ 370 #define IXATTR 0x0001 /* extended attribute */ 371 #define IFALLOCATE 0x0002 /* fallocate'd file */ 372 #define ICOMPRESS 0x0004 /* compressed for dcfs - see */ 373 /* `ufs_ioctl()`_FIO_COMPRESSED */ 374 375 /* modes */ 376 #define IFMT 0170000 /* type of file */ 377 #define IFIFO 0010000 /* named pipe (fifo) */ 378 #define IFCHR 0020000 /* character special */ 379 #define IFDIR 0040000 /* directory */ 380 #define IFBLK 0060000 /* block special */ 381 #define IFREG 0100000 /* regular */ 382 #define IFLNK 0120000 /* symbolic link */ 383 #define IFSHAD 0130000 /* shadow indode */ 384 #define IFSOCK 0140000 /* socket */ 385 #define IFATTRDIR 0160000 /* Attribute directory */ 386 387 #define ISUID 04000 /* set user id on execution */ 388 #define ISGID 02000 /* set group id on execution */ 389 #define ISVTX 01000 /* save swapped text even after use */ 390 #define IREAD 0400 /* read, write, execute permissions */ 391 #define IWRITE 0200 392 #define IEXEC 0100 393 394 /* specify how the inode info is written in ufs_syncip() */ 395 #define I_SYNC 1 /* wait for the inode written to disk */ 396 #define I_DSYNC 2 /* wait for the inode written to disk */ 397 /* only if IATTCHG is set */ 398 #define I_ASYNC 0 /* don't wait for the inode written */ 399 400 /* flags passed to ufs_itrunc(), indirtrunc(), and free() */ 401 #define I_FREE 0x00000001 /* inode is being freed */ 402 #define I_DIR 0x00000002 /* inode is a directory */ 403 #define I_IBLK 0x00000004 /* indirect block */ 404 #define I_CHEAP 0x00000008 /* cheap free */ 405 #define I_SHAD 0x00000010 /* inode is a shadow inode */ 406 #define I_QUOTA 0x00000020 /* quota file */ 407 #define I_NOCANCEL 0x40 /* Don't cancel these fragments */ 408 #define I_ACCT 0x00000080 /* Update ufsvfs' unreclaimed_blocks */ 409 410 /* 411 * If ufs_dircheckforname() fails to find an entry with the given name, 412 * this "slot" structure holds state for ufs_direnter_*() as to where 413 * there is space to put an entry with that name. 414 * If ufs_dircheckforname() finds an entry with the given name, this structure 415 * holds state for ufs_dirrename() and ufs_dirremove() as to where the 416 * entry is. "status" indicates what ufs_dircheckforname() found: 417 * NONE name not found, large enough free slot not found, 418 * FOUND name not found, large enough free slot found 419 * EXIST name found 420 * If ufs_dircheckforname() fails due to an error, this structure is not 421 * filled in. 422 * 423 * After ufs_dircheckforname() succeeds the values are: 424 * status offset size fbp, ep 425 * ------ ------ ---- ------- 426 * NONE end of dir needed not valid 427 * FOUND start of entry of ent both valid if fbp != NULL 428 * EXIST start of entry of prev ent valid 429 * 430 * "endoff" is set to 0 if the an entry with the given name is found, or if no 431 * free slot could be found or made; this means that the directory should not 432 * be truncated. If the entry was found, the search terminates so 433 * ufs_dircheckforname() didn't find out where the last valid entry in the 434 * directory was, so it doesn't know where to cut the directory off; if no free 435 * slot could be found or made, the directory has to be extended to make room 436 * for the new entry, so there's nothing to cut off. 437 * Otherwise, "endoff" is set to the larger of the offset of the last 438 * non-empty entry in the directory, or the offset at which the new entry will 439 * be placed, whichever is larger. This is used by ufs_diraddentry(); if a new 440 * entry is to be added to the directory, any complete directory blocks at the 441 * end of the directory that contain no non-empty entries are lopped off the 442 * end, thus shrinking the directory dynamically. 443 */ 444 typedef enum {NONE, FOUND, EXIST} slotstat_t; 445 struct ufs_slot { 446 struct direct *ep; /* pointer to slot */ 447 struct fbuf *fbp; /* dir buf where slot is */ 448 off_t offset; /* offset of area with free space */ 449 off_t endoff; /* last useful location found in search */ 450 slotstat_t status; /* status of slot */ 451 int size; /* size of area at slotoffset */ 452 int cached; /* cached directory */ 453 }; 454 455 /* 456 * Statistics on inodes 457 * Not protected by locks 458 */ 459 struct instats { 460 kstat_named_t in_size; /* current cache size */ 461 kstat_named_t in_maxsize; /* maximum cache size */ 462 kstat_named_t in_hits; /* cache hits */ 463 kstat_named_t in_misses; /* cache misses */ 464 kstat_named_t in_malloc; /* kmem_alloce'd */ 465 kstat_named_t in_mfree; /* kmem_free'd */ 466 kstat_named_t in_maxreached; /* Largest size reached by cache */ 467 kstat_named_t in_frfront; /* # put at front of freelist */ 468 kstat_named_t in_frback; /* # put at back of freelist */ 469 kstat_named_t in_qfree; /* q's to delete thread */ 470 kstat_named_t in_scan; /* # inodes scanned */ 471 kstat_named_t in_tidles; /* # inodes idled by idle thread */ 472 kstat_named_t in_lidles; /* # inodes idled by ufs_lookup */ 473 kstat_named_t in_vidles; /* # inodes idled by ufs_vget */ 474 kstat_named_t in_kcalloc; /* # inodes kmem_cache_alloced */ 475 kstat_named_t in_kcfree; /* # inodes kmem_cache_freed */ 476 kstat_named_t in_poc; /* # push-on-close's */ 477 }; 478 479 #ifdef _KERNEL 480 481 /* 482 * Extended attributes 483 */ 484 485 #define XATTR_DIR_NAME "/@/" 486 extern int ufs_ninode; /* high-water mark for inode cache */ 487 488 extern struct vnodeops *ufs_vnodeops; /* vnode operations for ufs */ 489 extern const struct fs_operation_def ufs_vnodeops_template[]; 490 491 /* 492 * Convert between inode pointers and vnode pointers 493 */ 494 #define VTOI(VP) ((struct inode *)(VP)->v_data) 495 #define ITOV(IP) ((struct vnode *)(IP)->i_vnode) 496 497 /* 498 * convert to fs 499 */ 500 #define ITOF(IP) ((struct fs *)(IP)->i_fs) 501 502 /* 503 * Convert between vnode types and inode formats 504 */ 505 extern enum vtype iftovt_tab[]; 506 507 #ifdef notneeded 508 509 /* Look at sys/mode.h and os/vnode.c */ 510 511 extern int vttoif_tab[]; 512 513 #endif 514 515 /* 516 * Mark an inode with the current (unique) timestamp. 517 * (Note that UFS's concept of time only keeps 32 bits of seconds 518 * in the on-disk format). 519 */ 520 struct timeval32 iuniqtime; 521 extern kmutex_t ufs_iuniqtime_lock; 522 523 #define ITIMES_NOLOCK(ip) ufs_itimes_nolock(ip) 524 525 #define ITIMES(ip) { \ 526 mutex_enter(&(ip)->i_tlock); \ 527 ITIMES_NOLOCK(ip); \ 528 mutex_exit(&(ip)->i_tlock); \ 529 } 530 531 /* 532 * The following interfaces are used to do atomic loads and stores 533 * of an inode's i_size, which is a long long data type. 534 * 535 * For LP64, we just to a load or a store - atomicity and alignment 536 * are 8-byte guaranteed. For x86 there are no such instructions, 537 * so we grab i_contents as reader to get the size; we already hold 538 * it as writer when we're setting the size. 539 */ 540 541 #ifdef _LP64 542 543 #define UFS_GET_ISIZE(resultp, ip) *(resultp) = (ip)->i_size 544 #define UFS_SET_ISIZE(value, ip) (ip)->i_size = (value) 545 546 #else /* _LP64 */ 547 548 #define UFS_GET_ISIZE(resultp, ip) \ 549 { \ 550 rw_enter(&(ip)->i_contents, RW_READER); \ 551 *(resultp) = (ip)->i_size; \ 552 rw_exit(&(ip)->i_contents); \ 553 } 554 #define UFS_SET_ISIZE(value, ip) \ 555 { \ 556 ASSERT(RW_WRITE_HELD(&(ip)->i_contents)); \ 557 (ip)->i_size = (value); \ 558 } 559 560 #endif /* _LP64 */ 561 562 /* 563 * Allocate the specified block in the inode 564 * and make sure any in-core pages are initialized. 565 */ 566 #define BMAPALLOC(ip, off, size, cr) \ 567 bmap_write((ip), (u_offset_t)(off), (size), BI_NORMAL, NULL, cr) 568 569 #define ESAME (-1) /* trying to rename linked files (special) */ 570 571 #define UFS_HOLE (daddr32_t)-1 /* value used when no block allocated */ 572 573 /* 574 * enums 575 */ 576 577 /* direnter ops */ 578 enum de_op { DE_CREATE, DE_MKDIR, DE_LINK, DE_RENAME, DE_SYMLINK, DE_ATTRDIR}; 579 580 /* dirremove ops */ 581 enum dr_op { DR_REMOVE, DR_RMDIR, DR_RENAME }; 582 583 /* 584 * block initialization type for bmap_write 585 * 586 * BI_NORMAL - allocate and zero fill pages in memory 587 * BI_ALLOC_ONLY - only allocate the block, do not zero out pages in mem 588 * BI_FALLOCATE - allocate only, do not zero out pages, and store as negative 589 * block number in inode block list 590 */ 591 enum bi_type { BI_NORMAL, BI_ALLOC_ONLY, BI_FALLOCATE }; 592 593 /* 594 * This overlays the fid structure (see vfs.h) 595 * 596 * LP64 note: we use int32_t instead of ino_t since UFS does not use 597 * inode numbers larger than 32-bits and ufid's are passed to NFS 598 * which expects them to not grow in size beyond 10 bytes (12 including 599 * the length). 600 */ 601 struct ufid { 602 ushort_t ufid_len; 603 ushort_t ufid_flags; 604 int32_t ufid_ino; 605 int32_t ufid_gen; 606 }; 607 608 /* 609 * each ufs thread (see ufs_thread.c) is managed by this struct 610 */ 611 struct ufs_q { 612 union uq_head { 613 void *_uq_generic; /* first entry on q */ 614 struct inode *_uq_i; 615 ufs_failure_t *_uq_uf; 616 } _uq_head; 617 int uq_ne; /* # of entries/failures found */ 618 int uq_lowat; /* thread runs when ne == lowat */ 619 int uq_hiwat; /* synchronous idle if ne >= hiwat */ 620 ushort_t uq_flags; /* flags (see below) */ 621 kcondvar_t uq_cv; /* for sleep/wakeup */ 622 kthread_id_t uq_threadp; /* thread managing this q */ 623 kmutex_t uq_mutex; /* protects this struct */ 624 }; 625 626 #define uq_head _uq_head._uq_generic 627 #define uq_ihead _uq_head._uq_i 628 #define uq_ufhead _uq_head._uq_uf 629 630 /* 631 * uq_flags 632 */ 633 #define UQ_EXIT (0x0001) /* q server exits at its convenience */ 634 #define UQ_WAIT (0x0002) /* thread is waiting on q server */ 635 #define UQ_SUSPEND (0x0004) /* request for suspension */ 636 #define UQ_SUSPENDED (0x0008) /* thread has suspended itself */ 637 638 /* 639 * When logging is enabled, statvfs must account for blocks and files that 640 * may be on the delete queue. Protected by ufsvfsp->vfs_delete.uq_mutex 641 */ 642 struct ufs_delq_info { 643 u_offset_t delq_unreclaimed_blocks; 644 ulong_t delq_unreclaimed_files; 645 }; 646 647 648 /* 649 * global idle queues 650 * The queues are sized dynamically in proportion to ufs_ninode 651 * which, unless overridden, scales with the amount of memory. 652 * The idle queue is halved whenever it hits the low water mark 653 * (1/4 of ufs_ninode), but can burst to sizes much larger. The number 654 * of hash queues is currently maintained to give on average IQHASHQLEN 655 * entries when the idle queue is at the low water mark. 656 * Note, we do not need to search along the hash queues, but use them 657 * in order to batch together geographically local inodes to allow 658 * their updates (via the log or buffer cache) to require less disk seeks. 659 * This gives an incredible performance boost for logging and a boost for 660 * non logging file systems. 661 */ 662 typedef struct { 663 inode_t *i_chain[2]; /* must match inode_t, but unused */ 664 inode_t *i_freef; /* must match inode_t, idle list forward */ 665 inode_t *i_freeb; /* must match inode_t, idle list back */ 666 } iqhead_t; 667 668 extern struct ufs_q ufs_idle_q; /* used by global ufs idle thread */ 669 extern iqhead_t *ufs_junk_iq; /* junk idle queues */ 670 extern iqhead_t *ufs_useful_iq; /* useful idle queues */ 671 extern int ufs_njunk_iq; /* number of entries in junk iq */ 672 extern int ufs_nuseful_iq; /* number of entries in useful iq */ 673 extern int ufs_niqhash; /* number of iq hash qs - power of 2 */ 674 extern int ufs_iqhashmask; /* iq hash mask = ufs_niqhash - 1 */ 675 676 #define IQHASHQLEN 32 /* see comments above */ 677 #define INOCGSHIFT 7 /* 128 inodes per cylinder group */ 678 #define IQHASH(ip) (((ip)->i_number >> INOCGSHIFT) & ufs_iqhashmask) 679 #define IQNEXT(i) ((i) + 1) & ufs_iqhashmask /* next idle queue */ 680 681 extern struct ufs_q ufs_hlock; /* used by global ufs hlock thread */ 682 683 /* 684 * vfs_lfflags flags 685 */ 686 #define UFS_LARGEFILES ((ushort_t)0x1) /* set if mount allows largefiles */ 687 688 /* 689 * vfs_dfritime flags 690 */ 691 #define UFS_DFRATIME 0x1 /* deferred access time */ 692 693 /* 694 * UFS VFS private data. 695 * 696 * UFS file system instances may be linked on several lists. 697 * 698 * - The vfs_next field chains together every extant ufs instance; this 699 * list is rooted at ufs_instances and should be used in preference to 700 * the overall vfs list (which is properly the province of the generic 701 * file system code, not of file system implementations). This same list 702 * link is used during forcible unmounts to chain together instances that 703 * can't yet be completely dismantled, 704 * 705 * - The vfs_wnext field is used within ufs_update to form a work list of 706 * UFS instances to be synced out. 707 */ 708 typedef struct ufsvfs { 709 struct vfs *vfs_vfs; /* back link */ 710 struct ufsvfs *vfs_next; /* instance list link */ 711 struct ufsvfs *vfs_wnext; /* work list link */ 712 struct vnode *vfs_root; /* root vnode */ 713 struct buf *vfs_bufp; /* buffer containing superblock */ 714 struct vnode *vfs_devvp; /* block device vnode */ 715 ushort_t vfs_lfflags; /* Large files (set by mount) */ 716 ushort_t vfs_qflags; /* QUOTA: filesystem flags */ 717 struct inode *vfs_qinod; /* QUOTA: pointer to quota file */ 718 uint_t vfs_btimelimit; /* QUOTA: block time limit */ 719 uint_t vfs_ftimelimit; /* QUOTA: file time limit */ 720 krwlock_t vfs_dqrwlock; /* QUOTA: protects quota fields */ 721 /* 722 * some fs local threads 723 */ 724 struct ufs_q vfs_delete; /* delayed inode delete */ 725 struct ufs_q vfs_reclaim; /* reclaim open, deleted files */ 726 727 /* 728 * This is copied from the super block at mount time. 729 */ 730 int vfs_nrpos; /* # rotational positions */ 731 /* 732 * This lock protects cg's and super block pointed at by 733 * vfs_bufp->b_fs. Locks contents of fs and cg's and contents 734 * of vfs_dio. 735 */ 736 kmutex_t vfs_lock; 737 struct ulockfs vfs_ulockfs; /* ufs lockfs support */ 738 uint_t vfs_dio; /* delayed io (_FIODIO) */ 739 uint_t vfs_nointr; /* disallow lockfs interrupts */ 740 uint_t vfs_nosetsec; /* disallow ufs_setsecattr */ 741 uint_t vfs_syncdir; /* synchronous local directory ops */ 742 uint_t vfs_dontblock; /* don't block on forced umount */ 743 744 /* 745 * trans (logging ufs) stuff 746 */ 747 uint_t vfs_domatamap; /* set if matamap enabled */ 748 ulong_t vfs_maxacl; /* transaction stuff - max acl size */ 749 ulong_t vfs_dirsize; /* logspace for directory creation */ 750 ulong_t vfs_avgbfree; /* average free blks in cg (blkpref) */ 751 /* 752 * Some useful constants 753 */ 754 int vfs_nindirshift; /* calc. from fs_nindir */ 755 int vfs_nindiroffset; /* calc. from fs_ninidr */ 756 int vfs_ioclustsz; /* bytes in read/write cluster */ 757 int vfs_iotransz; /* max device i/o transfer size */ 758 759 vfs_ufsfx_t vfs_fsfx; /* lock/fix-on-panic support */ 760 /* 761 * More useful constants 762 */ 763 int vfs_minfrags; /* calc. from fs_minfree */ 764 /* 765 * Force DirectIO on all files 766 */ 767 uint_t vfs_forcedirectio; 768 /* 769 * Deferred inode time related fields 770 */ 771 clock_t vfs_iotstamp; /* last I/O timestamp */ 772 uint_t vfs_dfritime; /* deferred inode time flags */ 773 /* 774 * Some more useful info 775 */ 776 dev_t vfs_dev; /* device mounted from */ 777 struct ml_unit *vfs_log; /* pointer to embedded log struct */ 778 uint_t vfs_noatime; /* disable inode atime updates */ 779 /* 780 * snapshot stuff 781 */ 782 void *vfs_snapshot; /* snapshot handle */ 783 /* 784 * Controls logging "file system full" messages to messages file 785 */ 786 clock_t vfs_lastwhinetime; 787 788 int vfs_nolog_si; /* not logging summary info */ 789 int vfs_validfs; /* indicates mounted fs */ 790 791 /* 792 * Additional information about vfs_delete above 793 */ 794 struct ufs_delq_info vfs_delete_info; /* what's on the delete queue */ 795 } ufsvfs_t; 796 797 #define vfs_fs vfs_bufp->b_un.b_fs 798 799 /* 800 * values for vfs_validfs 801 */ 802 #define UT_UNMOUNTED 0 803 #define UT_MOUNTED 1 804 #define UT_HLOCKING 2 805 806 /* inohsz is guaranteed to be a power of 2 */ 807 #define INOHASH(ino) (((int)ino) & (inohsz - 1)) 808 809 #define ISFALLOCBLK(ip, bn) \ 810 (((bn) < 0) && ((bn) % ip->i_fs->fs_frag == 0) && \ 811 ((ip)->i_cflags & IFALLOCATE && (bn) != UFS_HOLE)) 812 813 union ihead { 814 union ihead *ih_head[2]; 815 struct inode *ih_chain[2]; 816 }; 817 818 extern union ihead *ihead; 819 extern kmutex_t *ih_lock; 820 extern int *ih_ne; 821 extern int inohsz; 822 823 extern clock_t ufs_iowait; 824 825 #endif /* _KERNEL */ 826 827 /* 828 * ufs function prototypes 829 */ 830 #if defined(_KERNEL) && !defined(_BOOT) 831 832 extern void ufs_iinit(void); 833 extern int ufs_iget(struct vfs *, ino_t, struct inode **, cred_t *); 834 extern int ufs_iget_alloced(struct vfs *, ino_t, struct inode **, 835 cred_t *); 836 extern void ufs_reset_vnode(vnode_t *); 837 extern void ufs_iinactive(struct inode *); 838 extern void ufs_iupdat(struct inode *, int); 839 extern int ufs_rmidle(struct inode *); 840 extern int ufs_itrunc(struct inode *, u_offset_t, int, cred_t *); 841 extern int ufs_iaccess(void *, int, cred_t *); 842 extern int rdip(struct inode *, struct uio *, int, struct cred *); 843 extern int wrip(struct inode *, struct uio *, int, struct cred *); 844 845 extern void ufs_imark(struct inode *); 846 extern void ufs_itimes_nolock(struct inode *); 847 848 extern int ufs_dirlook(struct inode *, char *, struct inode **, 849 cred_t *, int); 850 extern int ufs_direnter_cm(struct inode *, char *, enum de_op, 851 struct vattr *, struct inode **, cred_t *, int); 852 extern int ufs_direnter_lr(struct inode *, char *, enum de_op, 853 struct inode *, struct inode *, cred_t *, vnode_t **); 854 extern int ufs_dircheckpath(ino_t, struct inode *, struct inode *, 855 struct cred *); 856 extern int ufs_dirmakeinode(struct inode *, struct inode **, 857 struct vattr *, enum de_op, cred_t *); 858 extern int ufs_dirremove(struct inode *, char *, struct inode *, 859 vnode_t *, enum dr_op, cred_t *, vnode_t **); 860 extern int ufs_dircheckforname(struct inode *, char *, int, 861 struct ufs_slot *, struct inode **, struct cred *, int); 862 extern int ufs_xattrdirempty(struct inode *, ino_t, cred_t *); 863 extern int blkatoff(struct inode *, off_t, char **, struct fbuf **); 864 865 extern void sbupdate(struct vfs *); 866 867 extern int ufs_ialloc(struct inode *, ino_t, mode_t, struct inode **, 868 cred_t *); 869 extern void ufs_ifree(struct inode *, ino_t, mode_t); 870 extern void free(struct inode *, daddr_t, off_t, int); 871 extern int alloc(struct inode *, daddr_t, int, daddr_t *, cred_t *); 872 extern int realloccg(struct inode *, daddr_t, daddr_t, int, int, 873 daddr_t *, cred_t *); 874 extern int ufs_allocsp(struct vnode *, struct flock64 *, cred_t *); 875 extern int ufs_freesp(struct vnode *, struct flock64 *, int, cred_t *); 876 extern ino_t dirpref(inode_t *); 877 extern daddr_t blkpref(struct inode *, daddr_t, int, daddr32_t *); 878 extern daddr_t contigpref(ufsvfs_t *, size_t); 879 880 extern int ufs_rdwri(enum uio_rw, int, struct inode *, caddr_t, ssize_t, 881 offset_t, enum uio_seg, int *, cred_t *); 882 883 extern int bmap_read(struct inode *, u_offset_t, daddr_t *, int *); 884 extern int bmap_write(struct inode *, u_offset_t, int, enum bi_type, 885 daddr_t *, struct cred *); 886 extern int bmap_has_holes(struct inode *); 887 extern int bmap_find(struct inode *, boolean_t, u_offset_t *); 888 extern int bmap_set_bn(struct vnode *, u_offset_t, daddr32_t); 889 890 extern void ufs_vfs_add(struct ufsvfs *); 891 extern void ufs_vfs_remove(struct ufsvfs *); 892 893 extern void ufs_sbwrite(struct ufsvfs *); 894 extern void ufs_update(int); 895 extern int ufs_getsummaryinfo(dev_t, struct ufsvfs *, struct fs *); 896 extern int ufs_putsummaryinfo(dev_t, struct ufsvfs *, struct fs *); 897 extern int ufs_syncip(struct inode *, int, int, top_t); 898 extern int ufs_sync_indir(struct inode *); 899 extern int ufs_indirblk_sync(struct inode *, offset_t); 900 extern int ufs_badblock(struct inode *, daddr_t); 901 extern int ufs_indir_badblock(struct inode *, daddr32_t *); 902 extern void ufs_notclean(struct ufsvfs *); 903 extern void ufs_checkclean(struct vfs *); 904 extern int isblock(struct fs *, uchar_t *, daddr_t); 905 extern void setblock(struct fs *, uchar_t *, daddr_t); 906 extern void clrblock(struct fs *, uchar_t *, daddr_t); 907 extern int isclrblock(struct fs *, uchar_t *, daddr_t); 908 extern void fragacct(struct fs *, int, int32_t *, int); 909 extern int skpc(char, uint_t, char *); 910 extern int ufs_fbwrite(struct fbuf *, struct inode *); 911 extern int ufs_fbiwrite(struct fbuf *, struct inode *, daddr_t, long); 912 extern int ufs_putapage(struct vnode *, struct page *, u_offset_t *, 913 size_t *, int, struct cred *); 914 extern inode_t *ufs_alloc_inode(ufsvfs_t *, ino_t); 915 extern void ufs_free_inode(inode_t *); 916 917 /* 918 * special stuff 919 */ 920 extern void ufs_setreclaim(struct inode *); 921 extern int ufs_scan_inodes(int, int (*)(struct inode *, void *), void *, 922 struct ufsvfs *); 923 extern int ufs_sync_inode(struct inode *, void *); 924 extern int ufs_sticky_remove_access(struct inode *, struct inode *, 925 struct cred *); 926 /* 927 * quota 928 */ 929 extern int chkiq(struct ufsvfs *, int, struct inode *, uid_t, int, 930 struct cred *, char **errp, size_t *lenp); 931 932 /* 933 * ufs thread stuff 934 */ 935 extern void ufs_thread_delete(struct vfs *); 936 extern void ufs_delete_drain(struct vfs *, int, int); 937 extern void ufs_delete(struct ufsvfs *, struct inode *, int); 938 extern void ufs_inode_cache_reclaim(void *); 939 extern void ufs_idle_drain(struct vfs *); 940 extern void ufs_idle_some(int); 941 extern void ufs_thread_idle(void); 942 extern void ufs_thread_reclaim(struct vfs *); 943 extern void ufs_thread_init(struct ufs_q *, int); 944 extern void ufs_thread_start(struct ufs_q *, void (*)(), struct vfs *); 945 extern void ufs_thread_exit(struct ufs_q *); 946 extern void ufs_thread_suspend(struct ufs_q *); 947 extern void ufs_thread_continue(struct ufs_q *); 948 extern void ufs_thread_hlock(void *); 949 extern void ufs_delete_init(struct ufsvfs *, int); 950 extern void ufs_delete_adjust_stats(struct ufsvfs *, struct statvfs64 *); 951 extern void ufs_delete_drain_wait(struct ufsvfs *, int); 952 953 /* 954 * ufs lockfs stuff 955 */ 956 struct seg; 957 extern int ufs_reconcile_fs(struct vfs *, struct ufsvfs *, int); 958 extern int ufs_quiesce(struct ulockfs *); 959 extern int ufs_flush(struct vfs *); 960 extern int ufs_fiolfs(struct vnode *, struct lockfs *, int); 961 extern int ufs__fiolfs(struct vnode *, struct lockfs *, int, int); 962 extern int ufs_fiolfss(struct vnode *, struct lockfs *); 963 extern int ufs_fioffs(struct vnode *, char *, struct cred *); 964 extern int ufs_check_lockfs(struct ufsvfs *, struct ulockfs *, ulong_t); 965 extern int ufs_lockfs_begin(struct ufsvfs *, struct ulockfs **, ulong_t); 966 extern int ufs_lockfs_trybegin(struct ufsvfs *, struct ulockfs **, ulong_t); 967 extern int ufs_lockfs_begin_getpage(struct ufsvfs *, struct ulockfs **, 968 struct seg *, int, uint_t *); 969 extern void ufs_lockfs_end(struct ulockfs *); 970 /* 971 * ufs acl stuff 972 */ 973 extern int ufs_si_inherit(struct inode *, struct inode *, o_mode_t, cred_t *); 974 extern void si_cache_init(void); 975 extern int ufs_si_load(struct inode *, cred_t *); 976 extern void ufs_si_del(struct inode *); 977 extern int ufs_acl_access(struct inode *, int, cred_t *); 978 extern void ufs_si_cache_flush(dev_t); 979 extern int ufs_si_free(si_t *, struct vfs *, cred_t *); 980 extern int ufs_acl_setattr(struct inode *, struct vattr *, cred_t *); 981 extern int ufs_acl_get(struct inode *, vsecattr_t *, int, cred_t *); 982 extern int ufs_acl_set(struct inode *, vsecattr_t *, int, cred_t *); 983 /* 984 * ufs directio stuff 985 */ 986 extern void ufs_directio_init(); 987 extern int ufs_directio_write(struct inode *, uio_t *, int, int, cred_t *, 988 int *); 989 extern int ufs_directio_read(struct inode *, uio_t *, cred_t *, int *); 990 #define DIRECTIO_FAILURE (0) 991 #define DIRECTIO_SUCCESS (1) 992 993 /* 994 * ufs extensions for PXFS 995 */ 996 997 int ufs_rdwr_data(vnode_t *vp, u_offset_t offset, size_t len, fdbuffer_t *fdb, 998 int flags, cred_t *cr); 999 int ufs_alloc_data(vnode_t *vp, u_offset_t offset, size_t *len, fdbuffer_t *fdb, 1000 int flags, cred_t *cr); 1001 1002 /* 1003 * prototypes to support the forced unmount 1004 */ 1005 1006 void ufs_freeze(struct ulockfs *, struct lockfs *); 1007 int ufs_thaw(struct vfs *, struct ufsvfs *, struct ulockfs *); 1008 1009 /* 1010 * extended attributes 1011 */ 1012 1013 int ufs_xattrmkdir(inode_t *, inode_t **, int, struct cred *); 1014 int ufs_xattr_getattrdir(vnode_t *, inode_t **, int, struct cred *); 1015 void ufs_unhook_shadow(inode_t *, inode_t *); 1016 1017 #endif /* defined(_KERNEL) && !defined(_BOOT) */ 1018 1019 #ifdef __cplusplus 1020 } 1021 #endif 1022 1023 #endif /* _SYS_FS_UFS_INODE_H */ 1024