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 12 /* 13 * Kernel only inode definitions 14 */ 15 struct xfs_dinode; 16 struct xfs_inode; 17 struct xfs_buf; 18 struct xfs_bmbt_irec; 19 struct xfs_inode_log_item; 20 struct xfs_mount; 21 struct xfs_trans; 22 struct xfs_dquot; 23 24 typedef struct xfs_inode { 25 /* Inode linking and identification information. */ 26 struct xfs_mount *i_mount; /* fs mount struct ptr */ 27 struct xfs_dquot *i_udquot; /* user dquot */ 28 struct xfs_dquot *i_gdquot; /* group dquot */ 29 struct xfs_dquot *i_pdquot; /* project dquot */ 30 31 /* Inode location stuff */ 32 xfs_ino_t i_ino; /* inode number (agno/agino)*/ 33 struct xfs_imap i_imap; /* location for xfs_imap() */ 34 35 /* Extent information. */ 36 struct xfs_ifork *i_cowfp; /* copy on write extents */ 37 struct xfs_ifork i_df; /* data fork */ 38 struct xfs_ifork i_af; /* attribute fork */ 39 40 /* Transaction and locking information. */ 41 struct xfs_inode_log_item *i_itemp; /* logging information */ 42 mrlock_t i_lock; /* inode lock */ 43 atomic_t i_pincount; /* inode pin count */ 44 struct llist_node i_gclist; /* deferred inactivation list */ 45 46 /* 47 * Bitsets of inode metadata that have been checked and/or are sick. 48 * Callers must hold i_flags_lock before accessing this field. 49 */ 50 uint16_t i_checked; 51 uint16_t i_sick; 52 53 spinlock_t i_flags_lock; /* inode i_flags lock */ 54 /* Miscellaneous state. */ 55 unsigned long i_flags; /* see defined flags below */ 56 uint64_t i_delayed_blks; /* count of delay alloc blks */ 57 xfs_fsize_t i_disk_size; /* number of bytes in file */ 58 xfs_rfsblock_t i_nblocks; /* # of direct & btree blocks */ 59 prid_t i_projid; /* owner's project id */ 60 xfs_extlen_t i_extsize; /* basic/minimum extent size */ 61 /* cowextsize is only used for v3 inodes, flushiter for v1/2 */ 62 union { 63 xfs_extlen_t i_cowextsize; /* basic cow extent size */ 64 uint16_t i_flushiter; /* incremented on flush */ 65 }; 66 uint8_t i_forkoff; /* attr fork offset >> 3 */ 67 uint16_t i_diflags; /* XFS_DIFLAG_... */ 68 uint64_t i_diflags2; /* XFS_DIFLAG2_... */ 69 struct timespec64 i_crtime; /* time created */ 70 71 /* 72 * Unlinked list pointers. These point to the next and previous inodes 73 * in the AGI unlinked bucket list, respectively. These fields can 74 * only be updated with the AGI locked. 75 * 76 * i_next_unlinked caches di_next_unlinked. 77 */ 78 xfs_agino_t i_next_unlinked; 79 80 /* 81 * If the inode is not on an unlinked list, this field is zero. If the 82 * inode is the first element in an unlinked list, this field is 83 * NULLAGINO. Otherwise, i_prev_unlinked points to the previous inode 84 * in the unlinked list. 85 */ 86 xfs_agino_t i_prev_unlinked; 87 88 /* VFS inode */ 89 struct inode i_vnode; /* embedded VFS inode */ 90 91 /* pending io completions */ 92 spinlock_t i_ioend_lock; 93 struct work_struct i_ioend_work; 94 struct list_head i_ioend_list; 95 } xfs_inode_t; 96 97 static inline bool xfs_inode_on_unlinked_list(const struct xfs_inode *ip) 98 { 99 return ip->i_prev_unlinked != 0; 100 } 101 102 static inline bool xfs_inode_has_attr_fork(struct xfs_inode *ip) 103 { 104 return ip->i_forkoff > 0; 105 } 106 107 static inline struct xfs_ifork * 108 xfs_ifork_ptr( 109 struct xfs_inode *ip, 110 int whichfork) 111 { 112 switch (whichfork) { 113 case XFS_DATA_FORK: 114 return &ip->i_df; 115 case XFS_ATTR_FORK: 116 if (!xfs_inode_has_attr_fork(ip)) 117 return NULL; 118 return &ip->i_af; 119 case XFS_COW_FORK: 120 return ip->i_cowfp; 121 default: 122 ASSERT(0); 123 return NULL; 124 } 125 } 126 127 static inline unsigned int xfs_inode_fork_boff(struct xfs_inode *ip) 128 { 129 return ip->i_forkoff << 3; 130 } 131 132 static inline unsigned int xfs_inode_data_fork_size(struct xfs_inode *ip) 133 { 134 if (xfs_inode_has_attr_fork(ip)) 135 return xfs_inode_fork_boff(ip); 136 137 return XFS_LITINO(ip->i_mount); 138 } 139 140 static inline unsigned int xfs_inode_attr_fork_size(struct xfs_inode *ip) 141 { 142 if (xfs_inode_has_attr_fork(ip)) 143 return XFS_LITINO(ip->i_mount) - xfs_inode_fork_boff(ip); 144 return 0; 145 } 146 147 static inline unsigned int 148 xfs_inode_fork_size( 149 struct xfs_inode *ip, 150 int whichfork) 151 { 152 switch (whichfork) { 153 case XFS_DATA_FORK: 154 return xfs_inode_data_fork_size(ip); 155 case XFS_ATTR_FORK: 156 return xfs_inode_attr_fork_size(ip); 157 default: 158 return 0; 159 } 160 } 161 162 /* Convert from vfs inode to xfs inode */ 163 static inline struct xfs_inode *XFS_I(struct inode *inode) 164 { 165 return container_of(inode, struct xfs_inode, i_vnode); 166 } 167 168 /* convert from xfs inode to vfs inode */ 169 static inline struct inode *VFS_I(struct xfs_inode *ip) 170 { 171 return &ip->i_vnode; 172 } 173 174 /* 175 * For regular files we only update the on-disk filesize when actually 176 * writing data back to disk. Until then only the copy in the VFS inode 177 * is uptodate. 178 */ 179 static inline xfs_fsize_t XFS_ISIZE(struct xfs_inode *ip) 180 { 181 if (S_ISREG(VFS_I(ip)->i_mode)) 182 return i_size_read(VFS_I(ip)); 183 return ip->i_disk_size; 184 } 185 186 /* 187 * If this I/O goes past the on-disk inode size update it unless it would 188 * be past the current in-core inode size. 189 */ 190 static inline xfs_fsize_t 191 xfs_new_eof(struct xfs_inode *ip, xfs_fsize_t new_size) 192 { 193 xfs_fsize_t i_size = i_size_read(VFS_I(ip)); 194 195 if (new_size > i_size || new_size < 0) 196 new_size = i_size; 197 return new_size > ip->i_disk_size ? new_size : 0; 198 } 199 200 /* 201 * i_flags helper functions 202 */ 203 static inline void 204 __xfs_iflags_set(xfs_inode_t *ip, unsigned short flags) 205 { 206 ip->i_flags |= flags; 207 } 208 209 static inline void 210 xfs_iflags_set(xfs_inode_t *ip, unsigned short flags) 211 { 212 spin_lock(&ip->i_flags_lock); 213 __xfs_iflags_set(ip, flags); 214 spin_unlock(&ip->i_flags_lock); 215 } 216 217 static inline void 218 xfs_iflags_clear(xfs_inode_t *ip, unsigned short flags) 219 { 220 spin_lock(&ip->i_flags_lock); 221 ip->i_flags &= ~flags; 222 spin_unlock(&ip->i_flags_lock); 223 } 224 225 static inline int 226 __xfs_iflags_test(xfs_inode_t *ip, unsigned short flags) 227 { 228 return (ip->i_flags & flags); 229 } 230 231 static inline int 232 xfs_iflags_test(xfs_inode_t *ip, unsigned short flags) 233 { 234 int ret; 235 spin_lock(&ip->i_flags_lock); 236 ret = __xfs_iflags_test(ip, flags); 237 spin_unlock(&ip->i_flags_lock); 238 return ret; 239 } 240 241 static inline int 242 xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned short flags) 243 { 244 int ret; 245 246 spin_lock(&ip->i_flags_lock); 247 ret = ip->i_flags & flags; 248 if (ret) 249 ip->i_flags &= ~flags; 250 spin_unlock(&ip->i_flags_lock); 251 return ret; 252 } 253 254 static inline int 255 xfs_iflags_test_and_set(xfs_inode_t *ip, unsigned short flags) 256 { 257 int ret; 258 259 spin_lock(&ip->i_flags_lock); 260 ret = ip->i_flags & flags; 261 if (!ret) 262 ip->i_flags |= flags; 263 spin_unlock(&ip->i_flags_lock); 264 return ret; 265 } 266 267 static inline prid_t 268 xfs_get_initial_prid(struct xfs_inode *dp) 269 { 270 if (dp->i_diflags & XFS_DIFLAG_PROJINHERIT) 271 return dp->i_projid; 272 273 return XFS_PROJID_DEFAULT; 274 } 275 276 static inline bool xfs_is_reflink_inode(struct xfs_inode *ip) 277 { 278 return ip->i_diflags2 & XFS_DIFLAG2_REFLINK; 279 } 280 281 static inline bool xfs_is_metadata_inode(struct xfs_inode *ip) 282 { 283 struct xfs_mount *mp = ip->i_mount; 284 285 return ip == mp->m_rbmip || ip == mp->m_rsumip || 286 xfs_is_quota_inode(&mp->m_sb, ip->i_ino); 287 } 288 289 /* 290 * Check if an inode has any data in the COW fork. This might be often false 291 * even for inodes with the reflink flag when there is no pending COW operation. 292 */ 293 static inline bool xfs_inode_has_cow_data(struct xfs_inode *ip) 294 { 295 return ip->i_cowfp && ip->i_cowfp->if_bytes; 296 } 297 298 static inline bool xfs_inode_has_bigtime(struct xfs_inode *ip) 299 { 300 return ip->i_diflags2 & XFS_DIFLAG2_BIGTIME; 301 } 302 303 static inline bool xfs_inode_has_large_extent_counts(struct xfs_inode *ip) 304 { 305 return ip->i_diflags2 & XFS_DIFLAG2_NREXT64; 306 } 307 308 /* 309 * Return the buftarg used for data allocations on a given inode. 310 */ 311 #define xfs_inode_buftarg(ip) \ 312 (XFS_IS_REALTIME_INODE(ip) ? \ 313 (ip)->i_mount->m_rtdev_targp : (ip)->i_mount->m_ddev_targp) 314 315 /* 316 * In-core inode flags. 317 */ 318 #define XFS_IRECLAIM (1 << 0) /* started reclaiming this inode */ 319 #define XFS_ISTALE (1 << 1) /* inode has been staled */ 320 #define XFS_IRECLAIMABLE (1 << 2) /* inode can be reclaimed */ 321 #define XFS_INEW (1 << 3) /* inode has just been allocated */ 322 #define XFS_IPRESERVE_DM_FIELDS (1 << 4) /* has legacy DMAPI fields set */ 323 #define XFS_ITRUNCATED (1 << 5) /* truncated down so flush-on-close */ 324 #define XFS_IDIRTY_RELEASE (1 << 6) /* dirty release already seen */ 325 #define XFS_IFLUSHING (1 << 7) /* inode is being flushed */ 326 #define __XFS_IPINNED_BIT 8 /* wakeup key for zero pin count */ 327 #define XFS_IPINNED (1 << __XFS_IPINNED_BIT) 328 #define XFS_IEOFBLOCKS (1 << 9) /* has the preallocblocks tag set */ 329 #define XFS_NEED_INACTIVE (1 << 10) /* see XFS_INACTIVATING below */ 330 /* 331 * If this unlinked inode is in the middle of recovery, don't let drop_inode 332 * truncate and free the inode. This can happen if we iget the inode during 333 * log recovery to replay a bmap operation on the inode. 334 */ 335 #define XFS_IRECOVERY (1 << 11) 336 #define XFS_ICOWBLOCKS (1 << 12)/* has the cowblocks tag set */ 337 338 /* 339 * If we need to update on-disk metadata before this IRECLAIMABLE inode can be 340 * freed, then NEED_INACTIVE will be set. Once we start the updates, the 341 * INACTIVATING bit will be set to keep iget away from this inode. After the 342 * inactivation completes, both flags will be cleared and the inode is a 343 * plain old IRECLAIMABLE inode. 344 */ 345 #define XFS_INACTIVATING (1 << 13) 346 347 /* Quotacheck is running but inode has not been added to quota counts. */ 348 #define XFS_IQUOTAUNCHECKED (1 << 14) 349 350 /* 351 * Remap in progress. Callers that wish to update file data while 352 * holding a shared IOLOCK or MMAPLOCK must drop the lock and retake 353 * the lock in exclusive mode. Relocking the file will block until 354 * IREMAPPING is cleared. 355 */ 356 #define XFS_IREMAPPING (1U << 15) 357 358 /* All inode state flags related to inode reclaim. */ 359 #define XFS_ALL_IRECLAIM_FLAGS (XFS_IRECLAIMABLE | \ 360 XFS_IRECLAIM | \ 361 XFS_NEED_INACTIVE | \ 362 XFS_INACTIVATING) 363 364 /* 365 * Per-lifetime flags need to be reset when re-using a reclaimable inode during 366 * inode lookup. This prevents unintended behaviour on the new inode from 367 * ocurring. 368 */ 369 #define XFS_IRECLAIM_RESET_FLAGS \ 370 (XFS_IRECLAIMABLE | XFS_IRECLAIM | \ 371 XFS_IDIRTY_RELEASE | XFS_ITRUNCATED | XFS_NEED_INACTIVE | \ 372 XFS_INACTIVATING | XFS_IQUOTAUNCHECKED) 373 374 /* 375 * Flags for inode locking. 376 * Bit ranges: 1<<1 - 1<<16-1 -- iolock/ilock modes (bitfield) 377 * 1<<16 - 1<<32-1 -- lockdep annotation (integers) 378 */ 379 #define XFS_IOLOCK_EXCL (1u << 0) 380 #define XFS_IOLOCK_SHARED (1u << 1) 381 #define XFS_ILOCK_EXCL (1u << 2) 382 #define XFS_ILOCK_SHARED (1u << 3) 383 #define XFS_MMAPLOCK_EXCL (1u << 4) 384 #define XFS_MMAPLOCK_SHARED (1u << 5) 385 386 #define XFS_LOCK_MASK (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \ 387 | XFS_ILOCK_EXCL | XFS_ILOCK_SHARED \ 388 | XFS_MMAPLOCK_EXCL | XFS_MMAPLOCK_SHARED) 389 390 #define XFS_LOCK_FLAGS \ 391 { XFS_IOLOCK_EXCL, "IOLOCK_EXCL" }, \ 392 { XFS_IOLOCK_SHARED, "IOLOCK_SHARED" }, \ 393 { XFS_ILOCK_EXCL, "ILOCK_EXCL" }, \ 394 { XFS_ILOCK_SHARED, "ILOCK_SHARED" }, \ 395 { XFS_MMAPLOCK_EXCL, "MMAPLOCK_EXCL" }, \ 396 { XFS_MMAPLOCK_SHARED, "MMAPLOCK_SHARED" } 397 398 399 /* 400 * Flags for lockdep annotations. 401 * 402 * XFS_LOCK_PARENT - for directory operations that require locking a 403 * parent directory inode and a child entry inode. IOLOCK requires nesting, 404 * MMAPLOCK does not support this class, ILOCK requires a single subclass 405 * to differentiate parent from child. 406 * 407 * XFS_LOCK_RTBITMAP/XFS_LOCK_RTSUM - the realtime device bitmap and summary 408 * inodes do not participate in the normal lock order, and thus have their 409 * own subclasses. 410 * 411 * XFS_LOCK_INUMORDER - for locking several inodes at the some time 412 * with xfs_lock_inodes(). This flag is used as the starting subclass 413 * and each subsequent lock acquired will increment the subclass by one. 414 * However, MAX_LOCKDEP_SUBCLASSES == 8, which means we are greatly 415 * limited to the subclasses we can represent via nesting. We need at least 416 * 5 inodes nest depth for the ILOCK through rename, and we also have to support 417 * XFS_ILOCK_PARENT, which gives 6 subclasses. Then we have XFS_ILOCK_RTBITMAP 418 * and XFS_ILOCK_RTSUM, which are another 2 unique subclasses, so that's all 419 * 8 subclasses supported by lockdep. 420 * 421 * This also means we have to number the sub-classes in the lowest bits of 422 * the mask we keep, and we have to ensure we never exceed 3 bits of lockdep 423 * mask and we can't use bit-masking to build the subclasses. What a mess. 424 * 425 * Bit layout: 426 * 427 * Bit Lock Region 428 * 16-19 XFS_IOLOCK_SHIFT dependencies 429 * 20-23 XFS_MMAPLOCK_SHIFT dependencies 430 * 24-31 XFS_ILOCK_SHIFT dependencies 431 * 432 * IOLOCK values 433 * 434 * 0-3 subclass value 435 * 4-7 unused 436 * 437 * MMAPLOCK values 438 * 439 * 0-3 subclass value 440 * 4-7 unused 441 * 442 * ILOCK values 443 * 0-4 subclass values 444 * 5 PARENT subclass (not nestable) 445 * 6 RTBITMAP subclass (not nestable) 446 * 7 RTSUM subclass (not nestable) 447 * 448 */ 449 #define XFS_IOLOCK_SHIFT 16 450 #define XFS_IOLOCK_MAX_SUBCLASS 3 451 #define XFS_IOLOCK_DEP_MASK 0x000f0000u 452 453 #define XFS_MMAPLOCK_SHIFT 20 454 #define XFS_MMAPLOCK_NUMORDER 0 455 #define XFS_MMAPLOCK_MAX_SUBCLASS 3 456 #define XFS_MMAPLOCK_DEP_MASK 0x00f00000u 457 458 #define XFS_ILOCK_SHIFT 24 459 #define XFS_ILOCK_PARENT_VAL 5u 460 #define XFS_ILOCK_MAX_SUBCLASS (XFS_ILOCK_PARENT_VAL - 1) 461 #define XFS_ILOCK_RTBITMAP_VAL 6u 462 #define XFS_ILOCK_RTSUM_VAL 7u 463 #define XFS_ILOCK_DEP_MASK 0xff000000u 464 #define XFS_ILOCK_PARENT (XFS_ILOCK_PARENT_VAL << XFS_ILOCK_SHIFT) 465 #define XFS_ILOCK_RTBITMAP (XFS_ILOCK_RTBITMAP_VAL << XFS_ILOCK_SHIFT) 466 #define XFS_ILOCK_RTSUM (XFS_ILOCK_RTSUM_VAL << XFS_ILOCK_SHIFT) 467 468 #define XFS_LOCK_SUBCLASS_MASK (XFS_IOLOCK_DEP_MASK | \ 469 XFS_MMAPLOCK_DEP_MASK | \ 470 XFS_ILOCK_DEP_MASK) 471 472 #define XFS_IOLOCK_DEP(flags) (((flags) & XFS_IOLOCK_DEP_MASK) \ 473 >> XFS_IOLOCK_SHIFT) 474 #define XFS_MMAPLOCK_DEP(flags) (((flags) & XFS_MMAPLOCK_DEP_MASK) \ 475 >> XFS_MMAPLOCK_SHIFT) 476 #define XFS_ILOCK_DEP(flags) (((flags) & XFS_ILOCK_DEP_MASK) \ 477 >> XFS_ILOCK_SHIFT) 478 479 /* 480 * Layouts are broken in the BREAK_WRITE case to ensure that 481 * layout-holders do not collide with local writes. Additionally, 482 * layouts are broken in the BREAK_UNMAP case to make sure the 483 * layout-holder has a consistent view of the file's extent map. While 484 * BREAK_WRITE breaks can be satisfied by recalling FL_LAYOUT leases, 485 * BREAK_UNMAP breaks additionally require waiting for busy dax-pages to 486 * go idle. 487 */ 488 enum layout_break_reason { 489 BREAK_WRITE, 490 BREAK_UNMAP, 491 }; 492 493 /* 494 * For multiple groups support: if S_ISGID bit is set in the parent 495 * directory, group of new file is set to that of the parent, and 496 * new subdirectory gets S_ISGID bit from parent. 497 */ 498 #define XFS_INHERIT_GID(pip) \ 499 (xfs_has_grpid((pip)->i_mount) || (VFS_I(pip)->i_mode & S_ISGID)) 500 501 int xfs_release(struct xfs_inode *ip); 502 int xfs_inactive(struct xfs_inode *ip); 503 int xfs_lookup(struct xfs_inode *dp, const struct xfs_name *name, 504 struct xfs_inode **ipp, struct xfs_name *ci_name); 505 int xfs_create(struct mnt_idmap *idmap, 506 struct xfs_inode *dp, struct xfs_name *name, 507 umode_t mode, dev_t rdev, bool need_xattr, 508 struct xfs_inode **ipp); 509 int xfs_create_tmpfile(struct mnt_idmap *idmap, 510 struct xfs_inode *dp, umode_t mode, 511 struct xfs_inode **ipp); 512 int xfs_remove(struct xfs_inode *dp, struct xfs_name *name, 513 struct xfs_inode *ip); 514 int xfs_link(struct xfs_inode *tdp, struct xfs_inode *sip, 515 struct xfs_name *target_name); 516 int xfs_rename(struct mnt_idmap *idmap, 517 struct xfs_inode *src_dp, struct xfs_name *src_name, 518 struct xfs_inode *src_ip, struct xfs_inode *target_dp, 519 struct xfs_name *target_name, 520 struct xfs_inode *target_ip, unsigned int flags); 521 522 void xfs_ilock(xfs_inode_t *, uint); 523 int xfs_ilock_nowait(xfs_inode_t *, uint); 524 void xfs_iunlock(xfs_inode_t *, uint); 525 void xfs_ilock_demote(xfs_inode_t *, uint); 526 bool xfs_isilocked(struct xfs_inode *, uint); 527 uint xfs_ilock_data_map_shared(struct xfs_inode *); 528 uint xfs_ilock_attr_map_shared(struct xfs_inode *); 529 530 uint xfs_ip2xflags(struct xfs_inode *); 531 int xfs_ifree(struct xfs_trans *, struct xfs_inode *); 532 int xfs_itruncate_extents_flags(struct xfs_trans **, 533 struct xfs_inode *, int, xfs_fsize_t, int); 534 void xfs_iext_realloc(xfs_inode_t *, int, int); 535 536 int xfs_log_force_inode(struct xfs_inode *ip); 537 void xfs_iunpin_wait(xfs_inode_t *); 538 #define xfs_ipincount(ip) ((unsigned int) atomic_read(&ip->i_pincount)) 539 540 int xfs_iflush_cluster(struct xfs_buf *); 541 void xfs_lock_two_inodes(struct xfs_inode *ip0, uint ip0_mode, 542 struct xfs_inode *ip1, uint ip1_mode); 543 544 xfs_extlen_t xfs_get_extsz_hint(struct xfs_inode *ip); 545 xfs_extlen_t xfs_get_cowextsz_hint(struct xfs_inode *ip); 546 547 int xfs_init_new_inode(struct mnt_idmap *idmap, struct xfs_trans *tp, 548 struct xfs_inode *pip, xfs_ino_t ino, umode_t mode, 549 xfs_nlink_t nlink, dev_t rdev, prid_t prid, bool init_xattrs, 550 struct xfs_inode **ipp); 551 552 static inline int 553 xfs_itruncate_extents( 554 struct xfs_trans **tpp, 555 struct xfs_inode *ip, 556 int whichfork, 557 xfs_fsize_t new_size) 558 { 559 return xfs_itruncate_extents_flags(tpp, ip, whichfork, new_size, 0); 560 } 561 562 /* from xfs_file.c */ 563 int xfs_break_dax_layouts(struct inode *inode, bool *retry); 564 int xfs_break_layouts(struct inode *inode, uint *iolock, 565 enum layout_break_reason reason); 566 567 /* from xfs_iops.c */ 568 extern void xfs_setup_inode(struct xfs_inode *ip); 569 extern void xfs_setup_iops(struct xfs_inode *ip); 570 extern void xfs_diflags_to_iflags(struct xfs_inode *ip, bool init); 571 572 static inline void xfs_update_stable_writes(struct xfs_inode *ip) 573 { 574 if (bdev_stable_writes(xfs_inode_buftarg(ip)->bt_bdev)) 575 mapping_set_stable_writes(VFS_I(ip)->i_mapping); 576 else 577 mapping_clear_stable_writes(VFS_I(ip)->i_mapping); 578 } 579 580 /* 581 * When setting up a newly allocated inode, we need to call 582 * xfs_finish_inode_setup() once the inode is fully instantiated at 583 * the VFS level to prevent the rest of the world seeing the inode 584 * before we've completed instantiation. Otherwise we can do it 585 * the moment the inode lookup is complete. 586 */ 587 static inline void xfs_finish_inode_setup(struct xfs_inode *ip) 588 { 589 xfs_iflags_clear(ip, XFS_INEW); 590 barrier(); 591 unlock_new_inode(VFS_I(ip)); 592 } 593 594 static inline void xfs_setup_existing_inode(struct xfs_inode *ip) 595 { 596 xfs_setup_inode(ip); 597 xfs_setup_iops(ip); 598 xfs_finish_inode_setup(ip); 599 } 600 601 void xfs_irele(struct xfs_inode *ip); 602 603 extern struct kmem_cache *xfs_inode_cache; 604 605 /* The default CoW extent size hint. */ 606 #define XFS_DEFAULT_COWEXTSZ_HINT 32 607 608 bool xfs_inode_needs_inactive(struct xfs_inode *ip); 609 610 void xfs_end_io(struct work_struct *work); 611 612 int xfs_ilock2_io_mmap(struct xfs_inode *ip1, struct xfs_inode *ip2); 613 void xfs_iunlock2_io_mmap(struct xfs_inode *ip1, struct xfs_inode *ip2); 614 void xfs_iunlock2_remapping(struct xfs_inode *ip1, struct xfs_inode *ip2); 615 616 static inline bool 617 xfs_inode_unlinked_incomplete( 618 struct xfs_inode *ip) 619 { 620 return VFS_I(ip)->i_nlink == 0 && !xfs_inode_on_unlinked_list(ip); 621 } 622 int xfs_inode_reload_unlinked_bucket(struct xfs_trans *tp, struct xfs_inode *ip); 623 int xfs_inode_reload_unlinked(struct xfs_inode *ip); 624 625 bool xfs_ifork_zapped(const struct xfs_inode *ip, int whichfork); 626 627 #endif /* __XFS_INODE_H__ */ 628