1 /* 2 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. 3 * All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 #ifndef __XFS_INODE_H__ 19 #define __XFS_INODE_H__ 20 21 struct posix_acl; 22 struct xfs_dinode; 23 struct xfs_inode; 24 25 /* 26 * Fork identifiers. 27 */ 28 #define XFS_DATA_FORK 0 29 #define XFS_ATTR_FORK 1 30 31 /* 32 * The following xfs_ext_irec_t struct introduces a second (top) level 33 * to the in-core extent allocation scheme. These structs are allocated 34 * in a contiguous block, creating an indirection array where each entry 35 * (irec) contains a pointer to a buffer of in-core extent records which 36 * it manages. Each extent buffer is 4k in size, since 4k is the system 37 * page size on Linux i386 and systems with larger page sizes don't seem 38 * to gain much, if anything, by using their native page size as the 39 * extent buffer size. Also, using 4k extent buffers everywhere provides 40 * a consistent interface for CXFS across different platforms. 41 * 42 * There is currently no limit on the number of irec's (extent lists) 43 * allowed, so heavily fragmented files may require an indirection array 44 * which spans multiple system pages of memory. The number of extents 45 * which would require this amount of contiguous memory is very large 46 * and should not cause problems in the foreseeable future. However, 47 * if the memory needed for the contiguous array ever becomes a problem, 48 * it is possible that a third level of indirection may be required. 49 */ 50 typedef struct xfs_ext_irec { 51 xfs_bmbt_rec_host_t *er_extbuf; /* block of extent records */ 52 xfs_extnum_t er_extoff; /* extent offset in file */ 53 xfs_extnum_t er_extcount; /* number of extents in page/block */ 54 } xfs_ext_irec_t; 55 56 /* 57 * File incore extent information, present for each of data & attr forks. 58 */ 59 #define XFS_IEXT_BUFSZ 4096 60 #define XFS_LINEAR_EXTS (XFS_IEXT_BUFSZ / (uint)sizeof(xfs_bmbt_rec_t)) 61 #define XFS_INLINE_EXTS 2 62 #define XFS_INLINE_DATA 32 63 typedef struct xfs_ifork { 64 int if_bytes; /* bytes in if_u1 */ 65 int if_real_bytes; /* bytes allocated in if_u1 */ 66 struct xfs_btree_block *if_broot; /* file's incore btree root */ 67 short if_broot_bytes; /* bytes allocated for root */ 68 unsigned char if_flags; /* per-fork flags */ 69 union { 70 xfs_bmbt_rec_host_t *if_extents;/* linear map file exts */ 71 xfs_ext_irec_t *if_ext_irec; /* irec map file exts */ 72 char *if_data; /* inline file data */ 73 } if_u1; 74 union { 75 xfs_bmbt_rec_host_t if_inline_ext[XFS_INLINE_EXTS]; 76 /* very small file extents */ 77 char if_inline_data[XFS_INLINE_DATA]; 78 /* very small file data */ 79 xfs_dev_t if_rdev; /* dev number if special */ 80 uuid_t if_uuid; /* mount point value */ 81 } if_u2; 82 } xfs_ifork_t; 83 84 /* 85 * Inode location information. Stored in the inode and passed to 86 * xfs_imap_to_bp() to get a buffer and dinode for a given inode. 87 */ 88 struct xfs_imap { 89 xfs_daddr_t im_blkno; /* starting BB of inode chunk */ 90 ushort im_len; /* length in BBs of inode chunk */ 91 ushort im_boffset; /* inode offset in block in bytes */ 92 }; 93 94 /* 95 * This is the xfs in-core inode structure. 96 * Most of the on-disk inode is embedded in the i_d field. 97 * 98 * The extent pointers/inline file space, however, are managed 99 * separately. The memory for this information is pointed to by 100 * the if_u1 unions depending on the type of the data. 101 * This is used to linearize the array of extents for fast in-core 102 * access. This is used until the file's number of extents 103 * surpasses XFS_MAX_INCORE_EXTENTS, at which point all extent pointers 104 * are accessed through the buffer cache. 105 * 106 * Other state kept in the in-core inode is used for identification, 107 * locking, transactional updating, etc of the inode. 108 * 109 * Generally, we do not want to hold the i_rlock while holding the 110 * i_ilock. Hierarchy is i_iolock followed by i_rlock. 111 * 112 * xfs_iptr_t contains all the inode fields up to and including the 113 * i_mnext and i_mprev fields, it is used as a marker in the inode 114 * chain off the mount structure by xfs_sync calls. 115 */ 116 117 typedef struct xfs_ictimestamp { 118 __int32_t t_sec; /* timestamp seconds */ 119 __int32_t t_nsec; /* timestamp nanoseconds */ 120 } xfs_ictimestamp_t; 121 122 /* 123 * NOTE: This structure must be kept identical to struct xfs_dinode 124 * in xfs_dinode.h except for the endianness annotations. 125 */ 126 typedef struct xfs_icdinode { 127 __uint16_t di_magic; /* inode magic # = XFS_DINODE_MAGIC */ 128 __uint16_t di_mode; /* mode and type of file */ 129 __int8_t di_version; /* inode version */ 130 __int8_t di_format; /* format of di_c data */ 131 __uint16_t di_onlink; /* old number of links to file */ 132 __uint32_t di_uid; /* owner's user id */ 133 __uint32_t di_gid; /* owner's group id */ 134 __uint32_t di_nlink; /* number of links to file */ 135 __uint16_t di_projid_lo; /* lower part of owner's project id */ 136 __uint16_t di_projid_hi; /* higher part of owner's project id */ 137 __uint8_t di_pad[6]; /* unused, zeroed space */ 138 __uint16_t di_flushiter; /* incremented on flush */ 139 xfs_ictimestamp_t di_atime; /* time last accessed */ 140 xfs_ictimestamp_t di_mtime; /* time last modified */ 141 xfs_ictimestamp_t di_ctime; /* time created/inode modified */ 142 xfs_fsize_t di_size; /* number of bytes in file */ 143 xfs_drfsbno_t di_nblocks; /* # of direct & btree blocks used */ 144 xfs_extlen_t di_extsize; /* basic/minimum extent size for file */ 145 xfs_extnum_t di_nextents; /* number of extents in data fork */ 146 xfs_aextnum_t di_anextents; /* number of extents in attribute fork*/ 147 __uint8_t di_forkoff; /* attr fork offs, <<3 for 64b align */ 148 __int8_t di_aformat; /* format of attr fork's data */ 149 __uint32_t di_dmevmask; /* DMIG event mask */ 150 __uint16_t di_dmstate; /* DMIG state info */ 151 __uint16_t di_flags; /* random flags, XFS_DIFLAG_... */ 152 __uint32_t di_gen; /* generation number */ 153 } xfs_icdinode_t; 154 155 /* 156 * Flags for xfs_ichgtime(). 157 */ 158 #define XFS_ICHGTIME_MOD 0x1 /* data fork modification timestamp */ 159 #define XFS_ICHGTIME_CHG 0x2 /* inode field change timestamp */ 160 161 /* 162 * Per-fork incore inode flags. 163 */ 164 #define XFS_IFINLINE 0x01 /* Inline data is read in */ 165 #define XFS_IFEXTENTS 0x02 /* All extent pointers are read in */ 166 #define XFS_IFBROOT 0x04 /* i_broot points to the bmap b-tree root */ 167 #define XFS_IFEXTIREC 0x08 /* Indirection array of extent blocks */ 168 169 /* 170 * Fork handling. 171 */ 172 173 #define XFS_IFORK_Q(ip) ((ip)->i_d.di_forkoff != 0) 174 #define XFS_IFORK_BOFF(ip) ((int)((ip)->i_d.di_forkoff << 3)) 175 176 #define XFS_IFORK_PTR(ip,w) \ 177 ((w) == XFS_DATA_FORK ? \ 178 &(ip)->i_df : \ 179 (ip)->i_afp) 180 #define XFS_IFORK_DSIZE(ip) \ 181 (XFS_IFORK_Q(ip) ? \ 182 XFS_IFORK_BOFF(ip) : \ 183 XFS_LITINO((ip)->i_mount)) 184 #define XFS_IFORK_ASIZE(ip) \ 185 (XFS_IFORK_Q(ip) ? \ 186 XFS_LITINO((ip)->i_mount) - XFS_IFORK_BOFF(ip) : \ 187 0) 188 #define XFS_IFORK_SIZE(ip,w) \ 189 ((w) == XFS_DATA_FORK ? \ 190 XFS_IFORK_DSIZE(ip) : \ 191 XFS_IFORK_ASIZE(ip)) 192 #define XFS_IFORK_FORMAT(ip,w) \ 193 ((w) == XFS_DATA_FORK ? \ 194 (ip)->i_d.di_format : \ 195 (ip)->i_d.di_aformat) 196 #define XFS_IFORK_FMT_SET(ip,w,n) \ 197 ((w) == XFS_DATA_FORK ? \ 198 ((ip)->i_d.di_format = (n)) : \ 199 ((ip)->i_d.di_aformat = (n))) 200 #define XFS_IFORK_NEXTENTS(ip,w) \ 201 ((w) == XFS_DATA_FORK ? \ 202 (ip)->i_d.di_nextents : \ 203 (ip)->i_d.di_anextents) 204 #define XFS_IFORK_NEXT_SET(ip,w,n) \ 205 ((w) == XFS_DATA_FORK ? \ 206 ((ip)->i_d.di_nextents = (n)) : \ 207 ((ip)->i_d.di_anextents = (n))) 208 #define XFS_IFORK_MAXEXT(ip, w) \ 209 (XFS_IFORK_SIZE(ip, w) / sizeof(xfs_bmbt_rec_t)) 210 211 212 #ifdef __KERNEL__ 213 214 struct xfs_buf; 215 struct xfs_bmap_free; 216 struct xfs_bmbt_irec; 217 struct xfs_inode_log_item; 218 struct xfs_mount; 219 struct xfs_trans; 220 struct xfs_dquot; 221 222 typedef struct xfs_inode { 223 /* Inode linking and identification information. */ 224 struct xfs_mount *i_mount; /* fs mount struct ptr */ 225 struct xfs_dquot *i_udquot; /* user dquot */ 226 struct xfs_dquot *i_gdquot; /* group dquot */ 227 228 /* Inode location stuff */ 229 xfs_ino_t i_ino; /* inode number (agno/agino)*/ 230 struct xfs_imap i_imap; /* location for xfs_imap() */ 231 232 /* Extent information. */ 233 xfs_ifork_t *i_afp; /* attribute fork pointer */ 234 xfs_ifork_t i_df; /* data fork */ 235 236 /* Transaction and locking information. */ 237 struct xfs_inode_log_item *i_itemp; /* logging information */ 238 mrlock_t i_lock; /* inode lock */ 239 mrlock_t i_iolock; /* inode IO lock */ 240 atomic_t i_pincount; /* inode pin count */ 241 spinlock_t i_flags_lock; /* inode i_flags lock */ 242 /* Miscellaneous state. */ 243 unsigned long i_flags; /* see defined flags below */ 244 unsigned int i_delayed_blks; /* count of delay alloc blks */ 245 246 xfs_icdinode_t i_d; /* most of ondisk inode */ 247 248 /* VFS inode */ 249 struct inode i_vnode; /* embedded VFS inode */ 250 } xfs_inode_t; 251 252 /* Convert from vfs inode to xfs inode */ 253 static inline struct xfs_inode *XFS_I(struct inode *inode) 254 { 255 return container_of(inode, struct xfs_inode, i_vnode); 256 } 257 258 /* convert from xfs inode to vfs inode */ 259 static inline struct inode *VFS_I(struct xfs_inode *ip) 260 { 261 return &ip->i_vnode; 262 } 263 264 /* 265 * For regular files we only update the on-disk filesize when actually 266 * writing data back to disk. Until then only the copy in the VFS inode 267 * is uptodate. 268 */ 269 static inline xfs_fsize_t XFS_ISIZE(struct xfs_inode *ip) 270 { 271 if (S_ISREG(ip->i_d.di_mode)) 272 return i_size_read(VFS_I(ip)); 273 return ip->i_d.di_size; 274 } 275 276 /* 277 * If this I/O goes past the on-disk inode size update it unless it would 278 * be past the current in-core inode size. 279 */ 280 static inline xfs_fsize_t 281 xfs_new_eof(struct xfs_inode *ip, xfs_fsize_t new_size) 282 { 283 xfs_fsize_t i_size = i_size_read(VFS_I(ip)); 284 285 if (new_size > i_size) 286 new_size = i_size; 287 return new_size > ip->i_d.di_size ? new_size : 0; 288 } 289 290 /* 291 * i_flags helper functions 292 */ 293 static inline void 294 __xfs_iflags_set(xfs_inode_t *ip, unsigned short flags) 295 { 296 ip->i_flags |= flags; 297 } 298 299 static inline void 300 xfs_iflags_set(xfs_inode_t *ip, unsigned short flags) 301 { 302 spin_lock(&ip->i_flags_lock); 303 __xfs_iflags_set(ip, flags); 304 spin_unlock(&ip->i_flags_lock); 305 } 306 307 static inline void 308 xfs_iflags_clear(xfs_inode_t *ip, unsigned short flags) 309 { 310 spin_lock(&ip->i_flags_lock); 311 ip->i_flags &= ~flags; 312 spin_unlock(&ip->i_flags_lock); 313 } 314 315 static inline int 316 __xfs_iflags_test(xfs_inode_t *ip, unsigned short flags) 317 { 318 return (ip->i_flags & flags); 319 } 320 321 static inline int 322 xfs_iflags_test(xfs_inode_t *ip, unsigned short flags) 323 { 324 int ret; 325 spin_lock(&ip->i_flags_lock); 326 ret = __xfs_iflags_test(ip, flags); 327 spin_unlock(&ip->i_flags_lock); 328 return ret; 329 } 330 331 static inline int 332 xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned short flags) 333 { 334 int ret; 335 336 spin_lock(&ip->i_flags_lock); 337 ret = ip->i_flags & flags; 338 if (ret) 339 ip->i_flags &= ~flags; 340 spin_unlock(&ip->i_flags_lock); 341 return ret; 342 } 343 344 static inline int 345 xfs_iflags_test_and_set(xfs_inode_t *ip, unsigned short flags) 346 { 347 int ret; 348 349 spin_lock(&ip->i_flags_lock); 350 ret = ip->i_flags & flags; 351 if (!ret) 352 ip->i_flags |= flags; 353 spin_unlock(&ip->i_flags_lock); 354 return ret; 355 } 356 357 /* 358 * Project quota id helpers (previously projid was 16bit only 359 * and using two 16bit values to hold new 32bit projid was chosen 360 * to retain compatibility with "old" filesystems). 361 */ 362 static inline prid_t 363 xfs_get_projid(struct xfs_inode *ip) 364 { 365 return (prid_t)ip->i_d.di_projid_hi << 16 | ip->i_d.di_projid_lo; 366 } 367 368 static inline void 369 xfs_set_projid(struct xfs_inode *ip, 370 prid_t projid) 371 { 372 ip->i_d.di_projid_hi = (__uint16_t) (projid >> 16); 373 ip->i_d.di_projid_lo = (__uint16_t) (projid & 0xffff); 374 } 375 376 /* 377 * In-core inode flags. 378 */ 379 #define XFS_IRECLAIM (1 << 0) /* started reclaiming this inode */ 380 #define XFS_ISTALE (1 << 1) /* inode has been staled */ 381 #define XFS_IRECLAIMABLE (1 << 2) /* inode can be reclaimed */ 382 #define XFS_INEW (1 << 3) /* inode has just been allocated */ 383 #define XFS_IFILESTREAM (1 << 4) /* inode is in a filestream dir. */ 384 #define XFS_ITRUNCATED (1 << 5) /* truncated down so flush-on-close */ 385 #define XFS_IDIRTY_RELEASE (1 << 6) /* dirty release already seen */ 386 #define __XFS_IFLOCK_BIT 7 /* inode is being flushed right now */ 387 #define XFS_IFLOCK (1 << __XFS_IFLOCK_BIT) 388 #define __XFS_IPINNED_BIT 8 /* wakeup key for zero pin count */ 389 #define XFS_IPINNED (1 << __XFS_IPINNED_BIT) 390 #define XFS_IDONTCACHE (1 << 9) /* don't cache the inode long term */ 391 392 /* 393 * Per-lifetime flags need to be reset when re-using a reclaimable inode during 394 * inode lookup. This prevents unintended behaviour on the new inode from 395 * ocurring. 396 */ 397 #define XFS_IRECLAIM_RESET_FLAGS \ 398 (XFS_IRECLAIMABLE | XFS_IRECLAIM | \ 399 XFS_IDIRTY_RELEASE | XFS_ITRUNCATED | \ 400 XFS_IFILESTREAM); 401 402 /* 403 * Synchronize processes attempting to flush the in-core inode back to disk. 404 */ 405 406 extern void __xfs_iflock(struct xfs_inode *ip); 407 408 static inline int xfs_iflock_nowait(struct xfs_inode *ip) 409 { 410 return !xfs_iflags_test_and_set(ip, XFS_IFLOCK); 411 } 412 413 static inline void xfs_iflock(struct xfs_inode *ip) 414 { 415 if (!xfs_iflock_nowait(ip)) 416 __xfs_iflock(ip); 417 } 418 419 static inline void xfs_ifunlock(struct xfs_inode *ip) 420 { 421 xfs_iflags_clear(ip, XFS_IFLOCK); 422 wake_up_bit(&ip->i_flags, __XFS_IFLOCK_BIT); 423 } 424 425 static inline int xfs_isiflocked(struct xfs_inode *ip) 426 { 427 return xfs_iflags_test(ip, XFS_IFLOCK); 428 } 429 430 /* 431 * Flags for inode locking. 432 * Bit ranges: 1<<1 - 1<<16-1 -- iolock/ilock modes (bitfield) 433 * 1<<16 - 1<<32-1 -- lockdep annotation (integers) 434 */ 435 #define XFS_IOLOCK_EXCL (1<<0) 436 #define XFS_IOLOCK_SHARED (1<<1) 437 #define XFS_ILOCK_EXCL (1<<2) 438 #define XFS_ILOCK_SHARED (1<<3) 439 440 #define XFS_LOCK_MASK (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \ 441 | XFS_ILOCK_EXCL | XFS_ILOCK_SHARED) 442 443 #define XFS_LOCK_FLAGS \ 444 { XFS_IOLOCK_EXCL, "IOLOCK_EXCL" }, \ 445 { XFS_IOLOCK_SHARED, "IOLOCK_SHARED" }, \ 446 { XFS_ILOCK_EXCL, "ILOCK_EXCL" }, \ 447 { XFS_ILOCK_SHARED, "ILOCK_SHARED" } 448 449 450 /* 451 * Flags for lockdep annotations. 452 * 453 * XFS_LOCK_PARENT - for directory operations that require locking a 454 * parent directory inode and a child entry inode. The parent gets locked 455 * with this flag so it gets a lockdep subclass of 1 and the child entry 456 * lock will have a lockdep subclass of 0. 457 * 458 * XFS_LOCK_RTBITMAP/XFS_LOCK_RTSUM - the realtime device bitmap and summary 459 * inodes do not participate in the normal lock order, and thus have their 460 * own subclasses. 461 * 462 * XFS_LOCK_INUMORDER - for locking several inodes at the some time 463 * with xfs_lock_inodes(). This flag is used as the starting subclass 464 * and each subsequent lock acquired will increment the subclass by one. 465 * So the first lock acquired will have a lockdep subclass of 4, the 466 * second lock will have a lockdep subclass of 5, and so on. It is 467 * the responsibility of the class builder to shift this to the correct 468 * portion of the lock_mode lockdep mask. 469 */ 470 #define XFS_LOCK_PARENT 1 471 #define XFS_LOCK_RTBITMAP 2 472 #define XFS_LOCK_RTSUM 3 473 #define XFS_LOCK_INUMORDER 4 474 475 #define XFS_IOLOCK_SHIFT 16 476 #define XFS_IOLOCK_PARENT (XFS_LOCK_PARENT << XFS_IOLOCK_SHIFT) 477 478 #define XFS_ILOCK_SHIFT 24 479 #define XFS_ILOCK_PARENT (XFS_LOCK_PARENT << XFS_ILOCK_SHIFT) 480 #define XFS_ILOCK_RTBITMAP (XFS_LOCK_RTBITMAP << XFS_ILOCK_SHIFT) 481 #define XFS_ILOCK_RTSUM (XFS_LOCK_RTSUM << XFS_ILOCK_SHIFT) 482 483 #define XFS_IOLOCK_DEP_MASK 0x00ff0000 484 #define XFS_ILOCK_DEP_MASK 0xff000000 485 #define XFS_LOCK_DEP_MASK (XFS_IOLOCK_DEP_MASK | XFS_ILOCK_DEP_MASK) 486 487 #define XFS_IOLOCK_DEP(flags) (((flags) & XFS_IOLOCK_DEP_MASK) >> XFS_IOLOCK_SHIFT) 488 #define XFS_ILOCK_DEP(flags) (((flags) & XFS_ILOCK_DEP_MASK) >> XFS_ILOCK_SHIFT) 489 490 extern struct lock_class_key xfs_iolock_reclaimable; 491 492 /* 493 * For multiple groups support: if S_ISGID bit is set in the parent 494 * directory, group of new file is set to that of the parent, and 495 * new subdirectory gets S_ISGID bit from parent. 496 */ 497 #define XFS_INHERIT_GID(pip) \ 498 (((pip)->i_mount->m_flags & XFS_MOUNT_GRPID) || \ 499 ((pip)->i_d.di_mode & S_ISGID)) 500 501 /* 502 * xfs_iget.c prototypes. 503 */ 504 int xfs_iget(struct xfs_mount *, struct xfs_trans *, xfs_ino_t, 505 uint, uint, xfs_inode_t **); 506 void xfs_ilock(xfs_inode_t *, uint); 507 int xfs_ilock_nowait(xfs_inode_t *, uint); 508 void xfs_iunlock(xfs_inode_t *, uint); 509 void xfs_ilock_demote(xfs_inode_t *, uint); 510 int xfs_isilocked(xfs_inode_t *, uint); 511 uint xfs_ilock_map_shared(xfs_inode_t *); 512 void xfs_iunlock_map_shared(xfs_inode_t *, uint); 513 void xfs_inode_free(struct xfs_inode *ip); 514 515 /* 516 * xfs_inode.c prototypes. 517 */ 518 int xfs_ialloc(struct xfs_trans *, xfs_inode_t *, umode_t, 519 xfs_nlink_t, xfs_dev_t, prid_t, int, 520 struct xfs_buf **, boolean_t *, xfs_inode_t **); 521 522 uint xfs_ip2xflags(struct xfs_inode *); 523 uint xfs_dic2xflags(struct xfs_dinode *); 524 int xfs_ifree(struct xfs_trans *, xfs_inode_t *, 525 struct xfs_bmap_free *); 526 int xfs_itruncate_extents(struct xfs_trans **, struct xfs_inode *, 527 int, xfs_fsize_t); 528 int xfs_iunlink(struct xfs_trans *, xfs_inode_t *); 529 530 void xfs_iext_realloc(xfs_inode_t *, int, int); 531 void xfs_iunpin_wait(xfs_inode_t *); 532 int xfs_iflush(struct xfs_inode *, struct xfs_buf **); 533 void xfs_lock_inodes(xfs_inode_t **, int, uint); 534 void xfs_lock_two_inodes(xfs_inode_t *, xfs_inode_t *, uint); 535 536 xfs_extlen_t xfs_get_extsz_hint(struct xfs_inode *ip); 537 538 #define IHOLD(ip) \ 539 do { \ 540 ASSERT(atomic_read(&VFS_I(ip)->i_count) > 0) ; \ 541 ihold(VFS_I(ip)); \ 542 trace_xfs_ihold(ip, _THIS_IP_); \ 543 } while (0) 544 545 #define IRELE(ip) \ 546 do { \ 547 trace_xfs_irele(ip, _THIS_IP_); \ 548 iput(VFS_I(ip)); \ 549 } while (0) 550 551 #endif /* __KERNEL__ */ 552 553 /* 554 * Flags for xfs_iget() 555 */ 556 #define XFS_IGET_CREATE 0x1 557 #define XFS_IGET_UNTRUSTED 0x2 558 #define XFS_IGET_DONTCACHE 0x4 559 560 int xfs_inotobp(struct xfs_mount *, struct xfs_trans *, 561 xfs_ino_t, struct xfs_dinode **, 562 struct xfs_buf **, int *, uint); 563 int xfs_itobp(struct xfs_mount *, struct xfs_trans *, 564 struct xfs_inode *, struct xfs_dinode **, 565 struct xfs_buf **, uint); 566 int xfs_iread(struct xfs_mount *, struct xfs_trans *, 567 struct xfs_inode *, uint); 568 void xfs_dinode_to_disk(struct xfs_dinode *, 569 struct xfs_icdinode *); 570 void xfs_idestroy_fork(struct xfs_inode *, int); 571 void xfs_idata_realloc(struct xfs_inode *, int, int); 572 void xfs_iroot_realloc(struct xfs_inode *, int, int); 573 int xfs_iread_extents(struct xfs_trans *, struct xfs_inode *, int); 574 int xfs_iextents_copy(struct xfs_inode *, xfs_bmbt_rec_t *, int); 575 576 xfs_bmbt_rec_host_t *xfs_iext_get_ext(xfs_ifork_t *, xfs_extnum_t); 577 void xfs_iext_insert(xfs_inode_t *, xfs_extnum_t, xfs_extnum_t, 578 xfs_bmbt_irec_t *, int); 579 void xfs_iext_add(xfs_ifork_t *, xfs_extnum_t, int); 580 void xfs_iext_add_indirect_multi(xfs_ifork_t *, int, xfs_extnum_t, int); 581 void xfs_iext_remove(xfs_inode_t *, xfs_extnum_t, int, int); 582 void xfs_iext_remove_inline(xfs_ifork_t *, xfs_extnum_t, int); 583 void xfs_iext_remove_direct(xfs_ifork_t *, xfs_extnum_t, int); 584 void xfs_iext_remove_indirect(xfs_ifork_t *, xfs_extnum_t, int); 585 void xfs_iext_realloc_direct(xfs_ifork_t *, int); 586 void xfs_iext_direct_to_inline(xfs_ifork_t *, xfs_extnum_t); 587 void xfs_iext_inline_to_direct(xfs_ifork_t *, int); 588 void xfs_iext_destroy(xfs_ifork_t *); 589 xfs_bmbt_rec_host_t *xfs_iext_bno_to_ext(xfs_ifork_t *, xfs_fileoff_t, int *); 590 xfs_ext_irec_t *xfs_iext_bno_to_irec(xfs_ifork_t *, xfs_fileoff_t, int *); 591 xfs_ext_irec_t *xfs_iext_idx_to_irec(xfs_ifork_t *, xfs_extnum_t *, int *, int); 592 void xfs_iext_irec_init(xfs_ifork_t *); 593 xfs_ext_irec_t *xfs_iext_irec_new(xfs_ifork_t *, int); 594 void xfs_iext_irec_remove(xfs_ifork_t *, int); 595 void xfs_iext_irec_compact(xfs_ifork_t *); 596 void xfs_iext_irec_compact_pages(xfs_ifork_t *); 597 void xfs_iext_irec_compact_full(xfs_ifork_t *); 598 void xfs_iext_irec_update_extoffs(xfs_ifork_t *, int, int); 599 600 #define xfs_ipincount(ip) ((unsigned int) atomic_read(&ip->i_pincount)) 601 602 #if defined(DEBUG) 603 void xfs_inobp_check(struct xfs_mount *, struct xfs_buf *); 604 #else 605 #define xfs_inobp_check(mp, bp) 606 #endif /* DEBUG */ 607 608 extern struct kmem_zone *xfs_ifork_zone; 609 extern struct kmem_zone *xfs_inode_zone; 610 extern struct kmem_zone *xfs_ili_zone; 611 612 #endif /* __XFS_INODE_H__ */ 613