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 */ 153 154 /* di_next_unlinked is the only non-core field in the old dinode */ 155 xfs_agino_t di_next_unlinked;/* agi unlinked list ptr */ 156 157 /* start of the extended dinode, writable fields */ 158 __uint32_t di_crc; /* CRC of the inode */ 159 __uint64_t di_changecount; /* number of attribute changes */ 160 xfs_lsn_t di_lsn; /* flush sequence */ 161 __uint64_t di_flags2; /* more random flags */ 162 __uint8_t di_pad2[16]; /* more padding for future expansion */ 163 164 /* fields only written to during inode creation */ 165 xfs_ictimestamp_t di_crtime; /* time created */ 166 xfs_ino_t di_ino; /* inode number */ 167 uuid_t di_uuid; /* UUID of the filesystem */ 168 169 /* structure must be padded to 64 bit alignment */ 170 } xfs_icdinode_t; 171 172 static inline uint xfs_icdinode_size(int version) 173 { 174 if (version == 3) 175 return sizeof(struct xfs_icdinode); 176 return offsetof(struct xfs_icdinode, di_next_unlinked); 177 } 178 179 /* 180 * Flags for xfs_ichgtime(). 181 */ 182 #define XFS_ICHGTIME_MOD 0x1 /* data fork modification timestamp */ 183 #define XFS_ICHGTIME_CHG 0x2 /* inode field change timestamp */ 184 #define XFS_ICHGTIME_CREATE 0x4 /* inode create timestamp */ 185 186 /* 187 * Per-fork incore inode flags. 188 */ 189 #define XFS_IFINLINE 0x01 /* Inline data is read in */ 190 #define XFS_IFEXTENTS 0x02 /* All extent pointers are read in */ 191 #define XFS_IFBROOT 0x04 /* i_broot points to the bmap b-tree root */ 192 #define XFS_IFEXTIREC 0x08 /* Indirection array of extent blocks */ 193 194 /* 195 * Fork handling. 196 */ 197 198 #define XFS_IFORK_Q(ip) ((ip)->i_d.di_forkoff != 0) 199 #define XFS_IFORK_BOFF(ip) ((int)((ip)->i_d.di_forkoff << 3)) 200 201 #define XFS_IFORK_PTR(ip,w) \ 202 ((w) == XFS_DATA_FORK ? \ 203 &(ip)->i_df : \ 204 (ip)->i_afp) 205 #define XFS_IFORK_DSIZE(ip) \ 206 (XFS_IFORK_Q(ip) ? \ 207 XFS_IFORK_BOFF(ip) : \ 208 XFS_LITINO((ip)->i_mount, (ip)->i_d.di_version)) 209 #define XFS_IFORK_ASIZE(ip) \ 210 (XFS_IFORK_Q(ip) ? \ 211 XFS_LITINO((ip)->i_mount, (ip)->i_d.di_version) - \ 212 XFS_IFORK_BOFF(ip) : \ 213 0) 214 #define XFS_IFORK_SIZE(ip,w) \ 215 ((w) == XFS_DATA_FORK ? \ 216 XFS_IFORK_DSIZE(ip) : \ 217 XFS_IFORK_ASIZE(ip)) 218 #define XFS_IFORK_FORMAT(ip,w) \ 219 ((w) == XFS_DATA_FORK ? \ 220 (ip)->i_d.di_format : \ 221 (ip)->i_d.di_aformat) 222 #define XFS_IFORK_FMT_SET(ip,w,n) \ 223 ((w) == XFS_DATA_FORK ? \ 224 ((ip)->i_d.di_format = (n)) : \ 225 ((ip)->i_d.di_aformat = (n))) 226 #define XFS_IFORK_NEXTENTS(ip,w) \ 227 ((w) == XFS_DATA_FORK ? \ 228 (ip)->i_d.di_nextents : \ 229 (ip)->i_d.di_anextents) 230 #define XFS_IFORK_NEXT_SET(ip,w,n) \ 231 ((w) == XFS_DATA_FORK ? \ 232 ((ip)->i_d.di_nextents = (n)) : \ 233 ((ip)->i_d.di_anextents = (n))) 234 #define XFS_IFORK_MAXEXT(ip, w) \ 235 (XFS_IFORK_SIZE(ip, w) / sizeof(xfs_bmbt_rec_t)) 236 237 238 #ifdef __KERNEL__ 239 240 struct xfs_buf; 241 struct xfs_bmap_free; 242 struct xfs_bmbt_irec; 243 struct xfs_inode_log_item; 244 struct xfs_mount; 245 struct xfs_trans; 246 struct xfs_dquot; 247 248 typedef struct xfs_inode { 249 /* Inode linking and identification information. */ 250 struct xfs_mount *i_mount; /* fs mount struct ptr */ 251 struct xfs_dquot *i_udquot; /* user dquot */ 252 struct xfs_dquot *i_gdquot; /* group dquot */ 253 254 /* Inode location stuff */ 255 xfs_ino_t i_ino; /* inode number (agno/agino)*/ 256 struct xfs_imap i_imap; /* location for xfs_imap() */ 257 258 /* Extent information. */ 259 xfs_ifork_t *i_afp; /* attribute fork pointer */ 260 xfs_ifork_t i_df; /* data fork */ 261 262 /* Transaction and locking information. */ 263 struct xfs_inode_log_item *i_itemp; /* logging information */ 264 mrlock_t i_lock; /* inode lock */ 265 mrlock_t i_iolock; /* inode IO lock */ 266 atomic_t i_pincount; /* inode pin count */ 267 spinlock_t i_flags_lock; /* inode i_flags lock */ 268 /* Miscellaneous state. */ 269 unsigned long i_flags; /* see defined flags below */ 270 unsigned int i_delayed_blks; /* count of delay alloc blks */ 271 272 xfs_icdinode_t i_d; /* most of ondisk inode */ 273 274 /* VFS inode */ 275 struct inode i_vnode; /* embedded VFS inode */ 276 } xfs_inode_t; 277 278 /* Convert from vfs inode to xfs inode */ 279 static inline struct xfs_inode *XFS_I(struct inode *inode) 280 { 281 return container_of(inode, struct xfs_inode, i_vnode); 282 } 283 284 /* convert from xfs inode to vfs inode */ 285 static inline struct inode *VFS_I(struct xfs_inode *ip) 286 { 287 return &ip->i_vnode; 288 } 289 290 /* 291 * For regular files we only update the on-disk filesize when actually 292 * writing data back to disk. Until then only the copy in the VFS inode 293 * is uptodate. 294 */ 295 static inline xfs_fsize_t XFS_ISIZE(struct xfs_inode *ip) 296 { 297 if (S_ISREG(ip->i_d.di_mode)) 298 return i_size_read(VFS_I(ip)); 299 return ip->i_d.di_size; 300 } 301 302 /* 303 * If this I/O goes past the on-disk inode size update it unless it would 304 * be past the current in-core inode size. 305 */ 306 static inline xfs_fsize_t 307 xfs_new_eof(struct xfs_inode *ip, xfs_fsize_t new_size) 308 { 309 xfs_fsize_t i_size = i_size_read(VFS_I(ip)); 310 311 if (new_size > i_size) 312 new_size = i_size; 313 return new_size > ip->i_d.di_size ? new_size : 0; 314 } 315 316 /* 317 * i_flags helper functions 318 */ 319 static inline void 320 __xfs_iflags_set(xfs_inode_t *ip, unsigned short flags) 321 { 322 ip->i_flags |= flags; 323 } 324 325 static inline void 326 xfs_iflags_set(xfs_inode_t *ip, unsigned short flags) 327 { 328 spin_lock(&ip->i_flags_lock); 329 __xfs_iflags_set(ip, flags); 330 spin_unlock(&ip->i_flags_lock); 331 } 332 333 static inline void 334 xfs_iflags_clear(xfs_inode_t *ip, unsigned short flags) 335 { 336 spin_lock(&ip->i_flags_lock); 337 ip->i_flags &= ~flags; 338 spin_unlock(&ip->i_flags_lock); 339 } 340 341 static inline int 342 __xfs_iflags_test(xfs_inode_t *ip, unsigned short flags) 343 { 344 return (ip->i_flags & flags); 345 } 346 347 static inline int 348 xfs_iflags_test(xfs_inode_t *ip, unsigned short flags) 349 { 350 int ret; 351 spin_lock(&ip->i_flags_lock); 352 ret = __xfs_iflags_test(ip, flags); 353 spin_unlock(&ip->i_flags_lock); 354 return ret; 355 } 356 357 static inline int 358 xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned short flags) 359 { 360 int ret; 361 362 spin_lock(&ip->i_flags_lock); 363 ret = ip->i_flags & flags; 364 if (ret) 365 ip->i_flags &= ~flags; 366 spin_unlock(&ip->i_flags_lock); 367 return ret; 368 } 369 370 static inline int 371 xfs_iflags_test_and_set(xfs_inode_t *ip, unsigned short flags) 372 { 373 int ret; 374 375 spin_lock(&ip->i_flags_lock); 376 ret = ip->i_flags & flags; 377 if (!ret) 378 ip->i_flags |= flags; 379 spin_unlock(&ip->i_flags_lock); 380 return ret; 381 } 382 383 /* 384 * Project quota id helpers (previously projid was 16bit only 385 * and using two 16bit values to hold new 32bit projid was chosen 386 * to retain compatibility with "old" filesystems). 387 */ 388 static inline prid_t 389 xfs_get_projid(struct xfs_inode *ip) 390 { 391 return (prid_t)ip->i_d.di_projid_hi << 16 | ip->i_d.di_projid_lo; 392 } 393 394 static inline void 395 xfs_set_projid(struct xfs_inode *ip, 396 prid_t projid) 397 { 398 ip->i_d.di_projid_hi = (__uint16_t) (projid >> 16); 399 ip->i_d.di_projid_lo = (__uint16_t) (projid & 0xffff); 400 } 401 402 /* 403 * In-core inode flags. 404 */ 405 #define XFS_IRECLAIM (1 << 0) /* started reclaiming this inode */ 406 #define XFS_ISTALE (1 << 1) /* inode has been staled */ 407 #define XFS_IRECLAIMABLE (1 << 2) /* inode can be reclaimed */ 408 #define XFS_INEW (1 << 3) /* inode has just been allocated */ 409 #define XFS_IFILESTREAM (1 << 4) /* inode is in a filestream dir. */ 410 #define XFS_ITRUNCATED (1 << 5) /* truncated down so flush-on-close */ 411 #define XFS_IDIRTY_RELEASE (1 << 6) /* dirty release already seen */ 412 #define __XFS_IFLOCK_BIT 7 /* inode is being flushed right now */ 413 #define XFS_IFLOCK (1 << __XFS_IFLOCK_BIT) 414 #define __XFS_IPINNED_BIT 8 /* wakeup key for zero pin count */ 415 #define XFS_IPINNED (1 << __XFS_IPINNED_BIT) 416 #define XFS_IDONTCACHE (1 << 9) /* don't cache the inode long term */ 417 418 /* 419 * Per-lifetime flags need to be reset when re-using a reclaimable inode during 420 * inode lookup. This prevents unintended behaviour on the new inode from 421 * ocurring. 422 */ 423 #define XFS_IRECLAIM_RESET_FLAGS \ 424 (XFS_IRECLAIMABLE | XFS_IRECLAIM | \ 425 XFS_IDIRTY_RELEASE | XFS_ITRUNCATED | \ 426 XFS_IFILESTREAM); 427 428 /* 429 * Synchronize processes attempting to flush the in-core inode back to disk. 430 */ 431 432 extern void __xfs_iflock(struct xfs_inode *ip); 433 434 static inline int xfs_iflock_nowait(struct xfs_inode *ip) 435 { 436 return !xfs_iflags_test_and_set(ip, XFS_IFLOCK); 437 } 438 439 static inline void xfs_iflock(struct xfs_inode *ip) 440 { 441 if (!xfs_iflock_nowait(ip)) 442 __xfs_iflock(ip); 443 } 444 445 static inline void xfs_ifunlock(struct xfs_inode *ip) 446 { 447 xfs_iflags_clear(ip, XFS_IFLOCK); 448 smp_mb(); 449 wake_up_bit(&ip->i_flags, __XFS_IFLOCK_BIT); 450 } 451 452 static inline int xfs_isiflocked(struct xfs_inode *ip) 453 { 454 return xfs_iflags_test(ip, XFS_IFLOCK); 455 } 456 457 /* 458 * Flags for inode locking. 459 * Bit ranges: 1<<1 - 1<<16-1 -- iolock/ilock modes (bitfield) 460 * 1<<16 - 1<<32-1 -- lockdep annotation (integers) 461 */ 462 #define XFS_IOLOCK_EXCL (1<<0) 463 #define XFS_IOLOCK_SHARED (1<<1) 464 #define XFS_ILOCK_EXCL (1<<2) 465 #define XFS_ILOCK_SHARED (1<<3) 466 467 #define XFS_LOCK_MASK (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \ 468 | XFS_ILOCK_EXCL | XFS_ILOCK_SHARED) 469 470 #define XFS_LOCK_FLAGS \ 471 { XFS_IOLOCK_EXCL, "IOLOCK_EXCL" }, \ 472 { XFS_IOLOCK_SHARED, "IOLOCK_SHARED" }, \ 473 { XFS_ILOCK_EXCL, "ILOCK_EXCL" }, \ 474 { XFS_ILOCK_SHARED, "ILOCK_SHARED" } 475 476 477 /* 478 * Flags for lockdep annotations. 479 * 480 * XFS_LOCK_PARENT - for directory operations that require locking a 481 * parent directory inode and a child entry inode. The parent gets locked 482 * with this flag so it gets a lockdep subclass of 1 and the child entry 483 * lock will have a lockdep subclass of 0. 484 * 485 * XFS_LOCK_RTBITMAP/XFS_LOCK_RTSUM - the realtime device bitmap and summary 486 * inodes do not participate in the normal lock order, and thus have their 487 * own subclasses. 488 * 489 * XFS_LOCK_INUMORDER - for locking several inodes at the some time 490 * with xfs_lock_inodes(). This flag is used as the starting subclass 491 * and each subsequent lock acquired will increment the subclass by one. 492 * So the first lock acquired will have a lockdep subclass of 4, the 493 * second lock will have a lockdep subclass of 5, and so on. It is 494 * the responsibility of the class builder to shift this to the correct 495 * portion of the lock_mode lockdep mask. 496 */ 497 #define XFS_LOCK_PARENT 1 498 #define XFS_LOCK_RTBITMAP 2 499 #define XFS_LOCK_RTSUM 3 500 #define XFS_LOCK_INUMORDER 4 501 502 #define XFS_IOLOCK_SHIFT 16 503 #define XFS_IOLOCK_PARENT (XFS_LOCK_PARENT << XFS_IOLOCK_SHIFT) 504 505 #define XFS_ILOCK_SHIFT 24 506 #define XFS_ILOCK_PARENT (XFS_LOCK_PARENT << XFS_ILOCK_SHIFT) 507 #define XFS_ILOCK_RTBITMAP (XFS_LOCK_RTBITMAP << XFS_ILOCK_SHIFT) 508 #define XFS_ILOCK_RTSUM (XFS_LOCK_RTSUM << XFS_ILOCK_SHIFT) 509 510 #define XFS_IOLOCK_DEP_MASK 0x00ff0000 511 #define XFS_ILOCK_DEP_MASK 0xff000000 512 #define XFS_LOCK_DEP_MASK (XFS_IOLOCK_DEP_MASK | XFS_ILOCK_DEP_MASK) 513 514 #define XFS_IOLOCK_DEP(flags) (((flags) & XFS_IOLOCK_DEP_MASK) >> XFS_IOLOCK_SHIFT) 515 #define XFS_ILOCK_DEP(flags) (((flags) & XFS_ILOCK_DEP_MASK) >> XFS_ILOCK_SHIFT) 516 517 /* 518 * For multiple groups support: if S_ISGID bit is set in the parent 519 * directory, group of new file is set to that of the parent, and 520 * new subdirectory gets S_ISGID bit from parent. 521 */ 522 #define XFS_INHERIT_GID(pip) \ 523 (((pip)->i_mount->m_flags & XFS_MOUNT_GRPID) || \ 524 ((pip)->i_d.di_mode & S_ISGID)) 525 526 527 /* 528 * xfs_inode.c prototypes. 529 */ 530 void xfs_ilock(xfs_inode_t *, uint); 531 int xfs_ilock_nowait(xfs_inode_t *, uint); 532 void xfs_iunlock(xfs_inode_t *, uint); 533 void xfs_ilock_demote(xfs_inode_t *, uint); 534 int xfs_isilocked(xfs_inode_t *, uint); 535 uint xfs_ilock_map_shared(xfs_inode_t *); 536 void xfs_iunlock_map_shared(xfs_inode_t *, uint); 537 int xfs_ialloc(struct xfs_trans *, xfs_inode_t *, umode_t, 538 xfs_nlink_t, xfs_dev_t, prid_t, int, 539 struct xfs_buf **, xfs_inode_t **); 540 541 uint xfs_ip2xflags(struct xfs_inode *); 542 uint xfs_dic2xflags(struct xfs_dinode *); 543 int xfs_ifree(struct xfs_trans *, xfs_inode_t *, 544 struct xfs_bmap_free *); 545 int xfs_itruncate_extents(struct xfs_trans **, struct xfs_inode *, 546 int, xfs_fsize_t); 547 int xfs_iunlink(struct xfs_trans *, xfs_inode_t *); 548 549 void xfs_iext_realloc(xfs_inode_t *, int, int); 550 void xfs_iunpin_wait(xfs_inode_t *); 551 int xfs_iflush(struct xfs_inode *, struct xfs_buf **); 552 void xfs_lock_inodes(xfs_inode_t **, int, uint); 553 void xfs_lock_two_inodes(xfs_inode_t *, xfs_inode_t *, uint); 554 555 xfs_extlen_t xfs_get_extsz_hint(struct xfs_inode *ip); 556 557 #define IHOLD(ip) \ 558 do { \ 559 ASSERT(atomic_read(&VFS_I(ip)->i_count) > 0) ; \ 560 ihold(VFS_I(ip)); \ 561 trace_xfs_ihold(ip, _THIS_IP_); \ 562 } while (0) 563 564 #define IRELE(ip) \ 565 do { \ 566 trace_xfs_irele(ip, _THIS_IP_); \ 567 iput(VFS_I(ip)); \ 568 } while (0) 569 570 #endif /* __KERNEL__ */ 571 572 /* 573 * Flags for xfs_iget() 574 */ 575 #define XFS_IGET_CREATE 0x1 576 #define XFS_IGET_UNTRUSTED 0x2 577 #define XFS_IGET_DONTCACHE 0x4 578 579 int xfs_imap_to_bp(struct xfs_mount *, struct xfs_trans *, 580 struct xfs_imap *, struct xfs_dinode **, 581 struct xfs_buf **, uint, uint); 582 int xfs_iread(struct xfs_mount *, struct xfs_trans *, 583 struct xfs_inode *, uint); 584 void xfs_dinode_calc_crc(struct xfs_mount *, struct xfs_dinode *); 585 void xfs_dinode_to_disk(struct xfs_dinode *, 586 struct xfs_icdinode *); 587 void xfs_idestroy_fork(struct xfs_inode *, int); 588 void xfs_idata_realloc(struct xfs_inode *, int, int); 589 void xfs_iroot_realloc(struct xfs_inode *, int, int); 590 int xfs_iread_extents(struct xfs_trans *, struct xfs_inode *, int); 591 int xfs_iextents_copy(struct xfs_inode *, xfs_bmbt_rec_t *, int); 592 593 xfs_bmbt_rec_host_t *xfs_iext_get_ext(xfs_ifork_t *, xfs_extnum_t); 594 void xfs_iext_insert(xfs_inode_t *, xfs_extnum_t, xfs_extnum_t, 595 xfs_bmbt_irec_t *, int); 596 void xfs_iext_add(xfs_ifork_t *, xfs_extnum_t, int); 597 void xfs_iext_add_indirect_multi(xfs_ifork_t *, int, xfs_extnum_t, int); 598 void xfs_iext_remove(xfs_inode_t *, xfs_extnum_t, int, int); 599 void xfs_iext_remove_inline(xfs_ifork_t *, xfs_extnum_t, int); 600 void xfs_iext_remove_direct(xfs_ifork_t *, xfs_extnum_t, int); 601 void xfs_iext_remove_indirect(xfs_ifork_t *, xfs_extnum_t, int); 602 void xfs_iext_realloc_direct(xfs_ifork_t *, int); 603 void xfs_iext_direct_to_inline(xfs_ifork_t *, xfs_extnum_t); 604 void xfs_iext_inline_to_direct(xfs_ifork_t *, int); 605 void xfs_iext_destroy(xfs_ifork_t *); 606 xfs_bmbt_rec_host_t *xfs_iext_bno_to_ext(xfs_ifork_t *, xfs_fileoff_t, int *); 607 xfs_ext_irec_t *xfs_iext_bno_to_irec(xfs_ifork_t *, xfs_fileoff_t, int *); 608 xfs_ext_irec_t *xfs_iext_idx_to_irec(xfs_ifork_t *, xfs_extnum_t *, int *, int); 609 void xfs_iext_irec_init(xfs_ifork_t *); 610 xfs_ext_irec_t *xfs_iext_irec_new(xfs_ifork_t *, int); 611 void xfs_iext_irec_remove(xfs_ifork_t *, int); 612 void xfs_iext_irec_compact(xfs_ifork_t *); 613 void xfs_iext_irec_compact_pages(xfs_ifork_t *); 614 void xfs_iext_irec_compact_full(xfs_ifork_t *); 615 void xfs_iext_irec_update_extoffs(xfs_ifork_t *, int, int); 616 bool xfs_can_free_eofblocks(struct xfs_inode *, bool); 617 618 #define xfs_ipincount(ip) ((unsigned int) atomic_read(&ip->i_pincount)) 619 620 #if defined(DEBUG) 621 void xfs_inobp_check(struct xfs_mount *, struct xfs_buf *); 622 #else 623 #define xfs_inobp_check(mp, bp) 624 #endif /* DEBUG */ 625 626 extern struct kmem_zone *xfs_ifork_zone; 627 extern struct kmem_zone *xfs_inode_zone; 628 extern struct kmem_zone *xfs_ili_zone; 629 extern const struct xfs_buf_ops xfs_inode_buf_ops; 630 631 #endif /* __XFS_INODE_H__ */ 632