1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. 4 * All Rights Reserved. 5 */ 6 #ifndef __XFS_INODE_H__ 7 #define __XFS_INODE_H__ 8 9 #include "xfs_inode_buf.h" 10 #include "xfs_inode_fork.h" 11 #include "xfs_inode_util.h" 12 13 /* 14 * Kernel only inode definitions 15 */ 16 struct xfs_dinode; 17 struct xfs_inode; 18 struct xfs_buf; 19 struct xfs_bmbt_irec; 20 struct xfs_inode_log_item; 21 struct xfs_mount; 22 struct xfs_trans; 23 struct xfs_dquot; 24 25 typedef struct xfs_inode { 26 /* Inode linking and identification information. */ 27 struct xfs_mount *i_mount; /* fs mount struct ptr */ 28 struct xfs_dquot *i_udquot; /* user dquot */ 29 struct xfs_dquot *i_gdquot; /* group dquot */ 30 struct xfs_dquot *i_pdquot; /* project dquot */ 31 32 /* Inode location stuff */ 33 xfs_ino_t i_ino; /* inode number (agno/agino)*/ 34 struct xfs_imap i_imap; /* location for xfs_imap() */ 35 36 /* Extent information. */ 37 struct xfs_ifork *i_cowfp; /* copy on write extents */ 38 struct xfs_ifork i_df; /* data fork */ 39 struct xfs_ifork i_af; /* attribute fork */ 40 41 /* Transaction and locking information. */ 42 struct xfs_inode_log_item *i_itemp; /* logging information */ 43 struct rw_semaphore i_lock; /* inode lock */ 44 atomic_t i_pincount; /* inode pin count */ 45 struct llist_node i_gclist; /* deferred inactivation list */ 46 47 /* 48 * Bitsets of inode metadata that have been checked and/or are sick. 49 * Callers must hold i_flags_lock before accessing this field. 50 */ 51 uint16_t i_checked; 52 uint16_t i_sick; 53 54 spinlock_t i_flags_lock; /* inode i_flags lock */ 55 /* Miscellaneous state. */ 56 unsigned long i_flags; /* see defined flags below */ 57 uint64_t i_delayed_blks; /* count of delay alloc blks */ 58 xfs_fsize_t i_disk_size; /* number of bytes in file */ 59 xfs_rfsblock_t i_nblocks; /* # of direct & btree blocks */ 60 prid_t i_projid; /* owner's project id */ 61 xfs_extlen_t i_extsize; /* basic/minimum extent size */ 62 /* cowextsize is only used for v3 inodes, flushiter for v1/2 */ 63 union { 64 xfs_extlen_t i_cowextsize; /* basic cow extent size */ 65 uint16_t i_flushiter; /* incremented on flush */ 66 }; 67 uint8_t i_forkoff; /* attr fork offset >> 3 */ 68 uint16_t i_diflags; /* XFS_DIFLAG_... */ 69 uint64_t i_diflags2; /* XFS_DIFLAG2_... */ 70 struct timespec64 i_crtime; /* time created */ 71 72 /* 73 * Unlinked list pointers. These point to the next and previous inodes 74 * in the AGI unlinked bucket list, respectively. These fields can 75 * only be updated with the AGI locked. 76 * 77 * i_next_unlinked caches di_next_unlinked. 78 */ 79 xfs_agino_t i_next_unlinked; 80 81 /* 82 * If the inode is not on an unlinked list, this field is zero. If the 83 * inode is the first element in an unlinked list, this field is 84 * NULLAGINO. Otherwise, i_prev_unlinked points to the previous inode 85 * in the unlinked list. 86 */ 87 xfs_agino_t i_prev_unlinked; 88 89 /* VFS inode */ 90 struct inode i_vnode; /* embedded VFS inode */ 91 92 /* pending io completions */ 93 spinlock_t i_ioend_lock; 94 struct work_struct i_ioend_work; 95 struct list_head i_ioend_list; 96 } xfs_inode_t; 97 98 static inline bool xfs_inode_on_unlinked_list(const struct xfs_inode *ip) 99 { 100 return ip->i_prev_unlinked != 0; 101 } 102 103 static inline bool xfs_inode_has_attr_fork(struct xfs_inode *ip) 104 { 105 return ip->i_forkoff > 0; 106 } 107 108 static inline struct xfs_ifork * 109 xfs_ifork_ptr( 110 struct xfs_inode *ip, 111 int whichfork) 112 { 113 switch (whichfork) { 114 case XFS_DATA_FORK: 115 return &ip->i_df; 116 case XFS_ATTR_FORK: 117 if (!xfs_inode_has_attr_fork(ip)) 118 return NULL; 119 return &ip->i_af; 120 case XFS_COW_FORK: 121 return ip->i_cowfp; 122 default: 123 ASSERT(0); 124 return NULL; 125 } 126 } 127 128 static inline unsigned int xfs_inode_fork_boff(struct xfs_inode *ip) 129 { 130 return ip->i_forkoff << 3; 131 } 132 133 static inline unsigned int xfs_inode_data_fork_size(struct xfs_inode *ip) 134 { 135 if (xfs_inode_has_attr_fork(ip)) 136 return xfs_inode_fork_boff(ip); 137 138 return XFS_LITINO(ip->i_mount); 139 } 140 141 static inline unsigned int xfs_inode_attr_fork_size(struct xfs_inode *ip) 142 { 143 if (xfs_inode_has_attr_fork(ip)) 144 return XFS_LITINO(ip->i_mount) - xfs_inode_fork_boff(ip); 145 return 0; 146 } 147 148 static inline unsigned int 149 xfs_inode_fork_size( 150 struct xfs_inode *ip, 151 int whichfork) 152 { 153 switch (whichfork) { 154 case XFS_DATA_FORK: 155 return xfs_inode_data_fork_size(ip); 156 case XFS_ATTR_FORK: 157 return xfs_inode_attr_fork_size(ip); 158 default: 159 return 0; 160 } 161 } 162 163 /* Convert from vfs inode to xfs inode */ 164 static inline struct xfs_inode *XFS_I(struct inode *inode) 165 { 166 return container_of(inode, struct xfs_inode, i_vnode); 167 } 168 169 /* convert from xfs inode to vfs inode */ 170 static inline struct inode *VFS_I(struct xfs_inode *ip) 171 { 172 return &ip->i_vnode; 173 } 174 175 /* convert from const xfs inode to const vfs inode */ 176 static inline const struct inode *VFS_IC(const struct xfs_inode *ip) 177 { 178 return &ip->i_vnode; 179 } 180 181 /* 182 * For regular files we only update the on-disk filesize when actually 183 * writing data back to disk. Until then only the copy in the VFS inode 184 * is uptodate. 185 */ 186 static inline xfs_fsize_t XFS_ISIZE(struct xfs_inode *ip) 187 { 188 if (S_ISREG(VFS_I(ip)->i_mode)) 189 return i_size_read(VFS_I(ip)); 190 return ip->i_disk_size; 191 } 192 193 /* 194 * If this I/O goes past the on-disk inode size update it unless it would 195 * be past the current in-core inode size. 196 */ 197 static inline xfs_fsize_t 198 xfs_new_eof(struct xfs_inode *ip, xfs_fsize_t new_size) 199 { 200 xfs_fsize_t i_size = i_size_read(VFS_I(ip)); 201 202 if (new_size > i_size || new_size < 0) 203 new_size = i_size; 204 return new_size > ip->i_disk_size ? new_size : 0; 205 } 206 207 /* 208 * i_flags helper functions 209 */ 210 static inline void 211 __xfs_iflags_set(xfs_inode_t *ip, unsigned long flags) 212 { 213 ip->i_flags |= flags; 214 } 215 216 static inline void 217 xfs_iflags_set(xfs_inode_t *ip, unsigned long flags) 218 { 219 spin_lock(&ip->i_flags_lock); 220 __xfs_iflags_set(ip, flags); 221 spin_unlock(&ip->i_flags_lock); 222 } 223 224 static inline void 225 xfs_iflags_clear(xfs_inode_t *ip, unsigned long flags) 226 { 227 spin_lock(&ip->i_flags_lock); 228 ip->i_flags &= ~flags; 229 spin_unlock(&ip->i_flags_lock); 230 } 231 232 static inline int 233 __xfs_iflags_test(xfs_inode_t *ip, unsigned long flags) 234 { 235 return (ip->i_flags & flags); 236 } 237 238 static inline int 239 xfs_iflags_test(xfs_inode_t *ip, unsigned long flags) 240 { 241 int ret; 242 spin_lock(&ip->i_flags_lock); 243 ret = __xfs_iflags_test(ip, flags); 244 spin_unlock(&ip->i_flags_lock); 245 return ret; 246 } 247 248 static inline int 249 xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned long flags) 250 { 251 int ret; 252 253 spin_lock(&ip->i_flags_lock); 254 ret = ip->i_flags & flags; 255 if (ret) 256 ip->i_flags &= ~flags; 257 spin_unlock(&ip->i_flags_lock); 258 return ret; 259 } 260 261 static inline int 262 xfs_iflags_test_and_set(xfs_inode_t *ip, unsigned long flags) 263 { 264 int ret; 265 266 spin_lock(&ip->i_flags_lock); 267 ret = ip->i_flags & flags; 268 if (!ret) 269 ip->i_flags |= flags; 270 spin_unlock(&ip->i_flags_lock); 271 return ret; 272 } 273 274 static inline bool xfs_is_reflink_inode(struct xfs_inode *ip) 275 { 276 return ip->i_diflags2 & XFS_DIFLAG2_REFLINK; 277 } 278 279 static inline bool xfs_is_metadata_inode(const struct xfs_inode *ip) 280 { 281 struct xfs_mount *mp = ip->i_mount; 282 283 return ip->i_ino == mp->m_sb.sb_rbmino || 284 ip->i_ino == mp->m_sb.sb_rsumino || 285 xfs_is_quota_inode(&mp->m_sb, ip->i_ino); 286 } 287 288 bool xfs_is_always_cow_inode(struct xfs_inode *ip); 289 290 static inline bool xfs_is_cow_inode(struct xfs_inode *ip) 291 { 292 return xfs_is_reflink_inode(ip) || xfs_is_always_cow_inode(ip); 293 } 294 295 static inline bool xfs_inode_has_filedata(const struct xfs_inode *ip) 296 { 297 return ip->i_df.if_nextents > 0 || ip->i_delayed_blks > 0; 298 } 299 300 /* 301 * Check if an inode has any data in the COW fork. This might be often false 302 * even for inodes with the reflink flag when there is no pending COW operation. 303 */ 304 static inline bool xfs_inode_has_cow_data(struct xfs_inode *ip) 305 { 306 return ip->i_cowfp && ip->i_cowfp->if_bytes; 307 } 308 309 static inline bool xfs_inode_has_bigtime(struct xfs_inode *ip) 310 { 311 return ip->i_diflags2 & XFS_DIFLAG2_BIGTIME; 312 } 313 314 static inline bool xfs_inode_has_large_extent_counts(struct xfs_inode *ip) 315 { 316 return ip->i_diflags2 & XFS_DIFLAG2_NREXT64; 317 } 318 319 /* 320 * Decide if this file is a realtime file whose data allocation unit is larger 321 * than a single filesystem block. 322 */ 323 static inline bool xfs_inode_has_bigrtalloc(struct xfs_inode *ip) 324 { 325 return XFS_IS_REALTIME_INODE(ip) && ip->i_mount->m_sb.sb_rextsize > 1; 326 } 327 328 /* 329 * Return the buftarg used for data allocations on a given inode. 330 */ 331 #define xfs_inode_buftarg(ip) \ 332 (XFS_IS_REALTIME_INODE(ip) ? \ 333 (ip)->i_mount->m_rtdev_targp : (ip)->i_mount->m_ddev_targp) 334 335 /* 336 * In-core inode flags. 337 */ 338 #define XFS_IRECLAIM (1 << 0) /* started reclaiming this inode */ 339 #define XFS_ISTALE (1 << 1) /* inode has been staled */ 340 #define XFS_IRECLAIMABLE (1 << 2) /* inode can be reclaimed */ 341 #define XFS_INEW (1 << 3) /* inode has just been allocated */ 342 #define XFS_IPRESERVE_DM_FIELDS (1 << 4) /* has legacy DMAPI fields set */ 343 #define XFS_ITRUNCATED (1 << 5) /* truncated down so flush-on-close */ 344 #define XFS_EOFBLOCKS_RELEASED (1 << 6) /* eofblocks were freed in ->release */ 345 #define XFS_IFLUSHING (1 << 7) /* inode is being flushed */ 346 #define __XFS_IPINNED_BIT 8 /* wakeup key for zero pin count */ 347 #define XFS_IPINNED (1 << __XFS_IPINNED_BIT) 348 #define XFS_IEOFBLOCKS (1 << 9) /* has the preallocblocks tag set */ 349 #define XFS_NEED_INACTIVE (1 << 10) /* see XFS_INACTIVATING below */ 350 /* 351 * If this unlinked inode is in the middle of recovery, don't let drop_inode 352 * truncate and free the inode. This can happen if we iget the inode during 353 * log recovery to replay a bmap operation on the inode. 354 */ 355 #define XFS_IRECOVERY (1 << 11) 356 #define XFS_ICOWBLOCKS (1 << 12)/* has the cowblocks tag set */ 357 358 /* 359 * If we need to update on-disk metadata before this IRECLAIMABLE inode can be 360 * freed, then NEED_INACTIVE will be set. Once we start the updates, the 361 * INACTIVATING bit will be set to keep iget away from this inode. After the 362 * inactivation completes, both flags will be cleared and the inode is a 363 * plain old IRECLAIMABLE inode. 364 */ 365 #define XFS_INACTIVATING (1 << 13) 366 367 /* Quotacheck is running but inode has not been added to quota counts. */ 368 #define XFS_IQUOTAUNCHECKED (1 << 14) 369 370 /* 371 * Remap in progress. Callers that wish to update file data while 372 * holding a shared IOLOCK or MMAPLOCK must drop the lock and retake 373 * the lock in exclusive mode. Relocking the file will block until 374 * IREMAPPING is cleared. 375 */ 376 #define XFS_IREMAPPING (1U << 15) 377 378 /* All inode state flags related to inode reclaim. */ 379 #define XFS_ALL_IRECLAIM_FLAGS (XFS_IRECLAIMABLE | \ 380 XFS_IRECLAIM | \ 381 XFS_NEED_INACTIVE | \ 382 XFS_INACTIVATING) 383 384 /* 385 * Per-lifetime flags need to be reset when re-using a reclaimable inode during 386 * inode lookup. This prevents unintended behaviour on the new inode from 387 * ocurring. 388 */ 389 #define XFS_IRECLAIM_RESET_FLAGS \ 390 (XFS_IRECLAIMABLE | XFS_IRECLAIM | \ 391 XFS_EOFBLOCKS_RELEASED | XFS_ITRUNCATED | XFS_NEED_INACTIVE | \ 392 XFS_INACTIVATING | XFS_IQUOTAUNCHECKED) 393 394 /* 395 * Flags for inode locking. 396 * Bit ranges: 1<<1 - 1<<16-1 -- iolock/ilock modes (bitfield) 397 * 1<<16 - 1<<32-1 -- lockdep annotation (integers) 398 */ 399 #define XFS_IOLOCK_EXCL (1u << 0) 400 #define XFS_IOLOCK_SHARED (1u << 1) 401 #define XFS_ILOCK_EXCL (1u << 2) 402 #define XFS_ILOCK_SHARED (1u << 3) 403 #define XFS_MMAPLOCK_EXCL (1u << 4) 404 #define XFS_MMAPLOCK_SHARED (1u << 5) 405 406 #define XFS_LOCK_MASK (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \ 407 | XFS_ILOCK_EXCL | XFS_ILOCK_SHARED \ 408 | XFS_MMAPLOCK_EXCL | XFS_MMAPLOCK_SHARED) 409 410 #define XFS_LOCK_FLAGS \ 411 { XFS_IOLOCK_EXCL, "IOLOCK_EXCL" }, \ 412 { XFS_IOLOCK_SHARED, "IOLOCK_SHARED" }, \ 413 { XFS_ILOCK_EXCL, "ILOCK_EXCL" }, \ 414 { XFS_ILOCK_SHARED, "ILOCK_SHARED" }, \ 415 { XFS_MMAPLOCK_EXCL, "MMAPLOCK_EXCL" }, \ 416 { XFS_MMAPLOCK_SHARED, "MMAPLOCK_SHARED" } 417 418 419 /* 420 * Flags for lockdep annotations. 421 * 422 * XFS_LOCK_PARENT - for directory operations that require locking a 423 * parent directory inode and a child entry inode. IOLOCK requires nesting, 424 * MMAPLOCK does not support this class, ILOCK requires a single subclass 425 * to differentiate parent from child. 426 * 427 * XFS_LOCK_RTBITMAP/XFS_LOCK_RTSUM - the realtime device bitmap and summary 428 * inodes do not participate in the normal lock order, and thus have their 429 * own subclasses. 430 * 431 * XFS_LOCK_INUMORDER - for locking several inodes at the some time 432 * with xfs_lock_inodes(). This flag is used as the starting subclass 433 * and each subsequent lock acquired will increment the subclass by one. 434 * However, MAX_LOCKDEP_SUBCLASSES == 8, which means we are greatly 435 * limited to the subclasses we can represent via nesting. We need at least 436 * 5 inodes nest depth for the ILOCK through rename, and we also have to support 437 * XFS_ILOCK_PARENT, which gives 6 subclasses. Then we have XFS_ILOCK_RTBITMAP 438 * and XFS_ILOCK_RTSUM, which are another 2 unique subclasses, so that's all 439 * 8 subclasses supported by lockdep. 440 * 441 * This also means we have to number the sub-classes in the lowest bits of 442 * the mask we keep, and we have to ensure we never exceed 3 bits of lockdep 443 * mask and we can't use bit-masking to build the subclasses. What a mess. 444 * 445 * Bit layout: 446 * 447 * Bit Lock Region 448 * 16-19 XFS_IOLOCK_SHIFT dependencies 449 * 20-23 XFS_MMAPLOCK_SHIFT dependencies 450 * 24-31 XFS_ILOCK_SHIFT dependencies 451 * 452 * IOLOCK values 453 * 454 * 0-3 subclass value 455 * 4-7 unused 456 * 457 * MMAPLOCK values 458 * 459 * 0-3 subclass value 460 * 4-7 unused 461 * 462 * ILOCK values 463 * 0-4 subclass values 464 * 5 PARENT subclass (not nestable) 465 * 6 RTBITMAP subclass (not nestable) 466 * 7 RTSUM subclass (not nestable) 467 * 468 */ 469 #define XFS_IOLOCK_SHIFT 16 470 #define XFS_IOLOCK_MAX_SUBCLASS 3 471 #define XFS_IOLOCK_DEP_MASK 0x000f0000u 472 473 #define XFS_MMAPLOCK_SHIFT 20 474 #define XFS_MMAPLOCK_NUMORDER 0 475 #define XFS_MMAPLOCK_MAX_SUBCLASS 3 476 #define XFS_MMAPLOCK_DEP_MASK 0x00f00000u 477 478 #define XFS_ILOCK_SHIFT 24 479 #define XFS_ILOCK_PARENT_VAL 5u 480 #define XFS_ILOCK_MAX_SUBCLASS (XFS_ILOCK_PARENT_VAL - 1) 481 #define XFS_ILOCK_RTBITMAP_VAL 6u 482 #define XFS_ILOCK_RTSUM_VAL 7u 483 #define XFS_ILOCK_DEP_MASK 0xff000000u 484 #define XFS_ILOCK_PARENT (XFS_ILOCK_PARENT_VAL << XFS_ILOCK_SHIFT) 485 #define XFS_ILOCK_RTBITMAP (XFS_ILOCK_RTBITMAP_VAL << XFS_ILOCK_SHIFT) 486 #define XFS_ILOCK_RTSUM (XFS_ILOCK_RTSUM_VAL << XFS_ILOCK_SHIFT) 487 488 #define XFS_LOCK_SUBCLASS_MASK (XFS_IOLOCK_DEP_MASK | \ 489 XFS_MMAPLOCK_DEP_MASK | \ 490 XFS_ILOCK_DEP_MASK) 491 492 #define XFS_IOLOCK_DEP(flags) (((flags) & XFS_IOLOCK_DEP_MASK) \ 493 >> XFS_IOLOCK_SHIFT) 494 #define XFS_MMAPLOCK_DEP(flags) (((flags) & XFS_MMAPLOCK_DEP_MASK) \ 495 >> XFS_MMAPLOCK_SHIFT) 496 #define XFS_ILOCK_DEP(flags) (((flags) & XFS_ILOCK_DEP_MASK) \ 497 >> XFS_ILOCK_SHIFT) 498 499 /* 500 * Layouts are broken in the BREAK_WRITE case to ensure that 501 * layout-holders do not collide with local writes. Additionally, 502 * layouts are broken in the BREAK_UNMAP case to make sure the 503 * layout-holder has a consistent view of the file's extent map. While 504 * BREAK_WRITE breaks can be satisfied by recalling FL_LAYOUT leases, 505 * BREAK_UNMAP breaks additionally require waiting for busy dax-pages to 506 * go idle. 507 */ 508 enum layout_break_reason { 509 BREAK_WRITE, 510 BREAK_UNMAP, 511 }; 512 513 /* 514 * For multiple groups support: if S_ISGID bit is set in the parent 515 * directory, group of new file is set to that of the parent, and 516 * new subdirectory gets S_ISGID bit from parent. 517 */ 518 #define XFS_INHERIT_GID(pip) \ 519 (xfs_has_grpid((pip)->i_mount) || (VFS_I(pip)->i_mode & S_ISGID)) 520 521 int xfs_inactive(struct xfs_inode *ip); 522 int xfs_lookup(struct xfs_inode *dp, const struct xfs_name *name, 523 struct xfs_inode **ipp, struct xfs_name *ci_name); 524 int xfs_create(const struct xfs_icreate_args *iargs, 525 struct xfs_name *name, struct xfs_inode **ipp); 526 int xfs_create_tmpfile(const struct xfs_icreate_args *iargs, 527 struct xfs_inode **ipp); 528 int xfs_remove(struct xfs_inode *dp, struct xfs_name *name, 529 struct xfs_inode *ip); 530 int xfs_link(struct xfs_inode *tdp, struct xfs_inode *sip, 531 struct xfs_name *target_name); 532 int xfs_rename(struct mnt_idmap *idmap, 533 struct xfs_inode *src_dp, struct xfs_name *src_name, 534 struct xfs_inode *src_ip, struct xfs_inode *target_dp, 535 struct xfs_name *target_name, 536 struct xfs_inode *target_ip, unsigned int flags); 537 538 void xfs_ilock(xfs_inode_t *, uint); 539 int xfs_ilock_nowait(xfs_inode_t *, uint); 540 void xfs_iunlock(xfs_inode_t *, uint); 541 void xfs_ilock_demote(xfs_inode_t *, uint); 542 void xfs_assert_ilocked(struct xfs_inode *, uint); 543 uint xfs_ilock_data_map_shared(struct xfs_inode *); 544 uint xfs_ilock_attr_map_shared(struct xfs_inode *); 545 546 int xfs_ifree(struct xfs_trans *, struct xfs_inode *); 547 int xfs_itruncate_extents_flags(struct xfs_trans **, 548 struct xfs_inode *, int, xfs_fsize_t, int); 549 void xfs_iext_realloc(xfs_inode_t *, int, int); 550 551 int xfs_log_force_inode(struct xfs_inode *ip); 552 void xfs_iunpin_wait(xfs_inode_t *); 553 #define xfs_ipincount(ip) ((unsigned int) atomic_read(&ip->i_pincount)) 554 555 int xfs_iflush_cluster(struct xfs_buf *); 556 void xfs_lock_two_inodes(struct xfs_inode *ip0, uint ip0_mode, 557 struct xfs_inode *ip1, uint ip1_mode); 558 559 int xfs_icreate(struct xfs_trans *tp, xfs_ino_t ino, 560 const struct xfs_icreate_args *args, struct xfs_inode **ipp); 561 562 static inline int 563 xfs_itruncate_extents( 564 struct xfs_trans **tpp, 565 struct xfs_inode *ip, 566 int whichfork, 567 xfs_fsize_t new_size) 568 { 569 return xfs_itruncate_extents_flags(tpp, ip, whichfork, new_size, 0); 570 } 571 572 int xfs_break_dax_layouts(struct inode *inode, bool *retry); 573 int xfs_break_layouts(struct inode *inode, uint *iolock, 574 enum layout_break_reason reason); 575 576 static inline void xfs_update_stable_writes(struct xfs_inode *ip) 577 { 578 if (bdev_stable_writes(xfs_inode_buftarg(ip)->bt_bdev)) 579 mapping_set_stable_writes(VFS_I(ip)->i_mapping); 580 else 581 mapping_clear_stable_writes(VFS_I(ip)->i_mapping); 582 } 583 584 /* 585 * When setting up a newly allocated inode, we need to call 586 * xfs_finish_inode_setup() once the inode is fully instantiated at 587 * the VFS level to prevent the rest of the world seeing the inode 588 * before we've completed instantiation. Otherwise we can do it 589 * the moment the inode lookup is complete. 590 */ 591 static inline void xfs_finish_inode_setup(struct xfs_inode *ip) 592 { 593 xfs_iflags_clear(ip, XFS_INEW); 594 barrier(); 595 unlock_new_inode(VFS_I(ip)); 596 } 597 598 static inline void xfs_setup_existing_inode(struct xfs_inode *ip) 599 { 600 xfs_setup_inode(ip); 601 xfs_setup_iops(ip); 602 xfs_finish_inode_setup(ip); 603 } 604 605 void xfs_irele(struct xfs_inode *ip); 606 607 extern struct kmem_cache *xfs_inode_cache; 608 609 /* The default CoW extent size hint. */ 610 #define XFS_DEFAULT_COWEXTSZ_HINT 32 611 612 bool xfs_inode_needs_inactive(struct xfs_inode *ip); 613 614 struct xfs_inode *xfs_iunlink_lookup(struct xfs_perag *pag, xfs_agino_t agino); 615 int xfs_iunlink_reload_next(struct xfs_trans *tp, struct xfs_buf *agibp, 616 xfs_agino_t prev_agino, xfs_agino_t next_agino); 617 618 void xfs_end_io(struct work_struct *work); 619 620 int xfs_ilock2_io_mmap(struct xfs_inode *ip1, struct xfs_inode *ip2); 621 void xfs_iunlock2_io_mmap(struct xfs_inode *ip1, struct xfs_inode *ip2); 622 void xfs_iunlock2_remapping(struct xfs_inode *ip1, struct xfs_inode *ip2); 623 void xfs_lock_inodes(struct xfs_inode **ips, int inodes, uint lock_mode); 624 void xfs_sort_inodes(struct xfs_inode **i_tab, unsigned int num_inodes); 625 626 static inline bool 627 xfs_inode_unlinked_incomplete( 628 struct xfs_inode *ip) 629 { 630 return VFS_I(ip)->i_nlink == 0 && !xfs_inode_on_unlinked_list(ip); 631 } 632 int xfs_inode_reload_unlinked_bucket(struct xfs_trans *tp, struct xfs_inode *ip); 633 int xfs_inode_reload_unlinked(struct xfs_inode *ip); 634 635 bool xfs_ifork_zapped(const struct xfs_inode *ip, int whichfork); 636 void xfs_inode_count_blocks(struct xfs_trans *tp, struct xfs_inode *ip, 637 xfs_filblks_t *dblocks, xfs_filblks_t *rblocks); 638 unsigned int xfs_inode_alloc_unitsize(struct xfs_inode *ip); 639 640 int xfs_icreate_dqalloc(const struct xfs_icreate_args *args, 641 struct xfs_dquot **udqpp, struct xfs_dquot **gdqpp, 642 struct xfs_dquot **pdqpp); 643 644 #endif /* __XFS_INODE_H__ */ 645