fs/xfs/xfs_inode.h

   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 /* All inode state flags related to inode reclaim. */
 351 #define XFS_ALL_IRECLAIM_FLAGS  (XFS_IRECLAIMABLE | \
 352                                  XFS_IRECLAIM | \
 353                                  XFS_NEED_INACTIVE | \
 354                                  XFS_INACTIVATING)
 355
 356 /*
 357  * Per-lifetime flags need to be reset when re-using a reclaimable inode during
 358  * inode lookup. This prevents unintended behaviour on the new inode from
 359  * ocurring.
 360  */
 361 #define XFS_IRECLAIM_RESET_FLAGS        \
 362         (XFS_IRECLAIMABLE | XFS_IRECLAIM | \
 363          XFS_IDIRTY_RELEASE | XFS_ITRUNCATED | XFS_NEED_INACTIVE | \
 364          XFS_INACTIVATING | XFS_IQUOTAUNCHECKED)
 365
 366 /*
 367  * Flags for inode locking.
 368  * Bit ranges:  1<<1  - 1<<16-1 -- iolock/ilock modes (bitfield)
 369  *              1<<16 - 1<<32-1 -- lockdep annotation (integers)
 370  */
 371 #define XFS_IOLOCK_EXCL         (1u << 0)
 372 #define XFS_IOLOCK_SHARED       (1u << 1)
 373 #define XFS_ILOCK_EXCL          (1u << 2)
 374 #define XFS_ILOCK_SHARED        (1u << 3)
 375 #define XFS_MMAPLOCK_EXCL       (1u << 4)
 376 #define XFS_MMAPLOCK_SHARED     (1u << 5)
 377
 378 #define XFS_LOCK_MASK           (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \
 379                                 | XFS_ILOCK_EXCL | XFS_ILOCK_SHARED \
 380                                 | XFS_MMAPLOCK_EXCL | XFS_MMAPLOCK_SHARED)
 381
 382 #define XFS_LOCK_FLAGS \
 383         { XFS_IOLOCK_EXCL,      "IOLOCK_EXCL" }, \
 384         { XFS_IOLOCK_SHARED,    "IOLOCK_SHARED" }, \
 385         { XFS_ILOCK_EXCL,       "ILOCK_EXCL" }, \
 386         { XFS_ILOCK_SHARED,     "ILOCK_SHARED" }, \
 387         { XFS_MMAPLOCK_EXCL,    "MMAPLOCK_EXCL" }, \
 388         { XFS_MMAPLOCK_SHARED,  "MMAPLOCK_SHARED" }
 389
 390
 391 /*
 392  * Flags for lockdep annotations.
 393  *
 394  * XFS_LOCK_PARENT - for directory operations that require locking a
 395  * parent directory inode and a child entry inode. IOLOCK requires nesting,
 396  * MMAPLOCK does not support this class, ILOCK requires a single subclass
 397  * to differentiate parent from child.
 398  *
 399  * XFS_LOCK_RTBITMAP/XFS_LOCK_RTSUM - the realtime device bitmap and summary
 400  * inodes do not participate in the normal lock order, and thus have their
 401  * own subclasses.
 402  *
 403  * XFS_LOCK_INUMORDER - for locking several inodes at the some time
 404  * with xfs_lock_inodes().  This flag is used as the starting subclass
 405  * and each subsequent lock acquired will increment the subclass by one.
 406  * However, MAX_LOCKDEP_SUBCLASSES == 8, which means we are greatly
 407  * limited to the subclasses we can represent via nesting. We need at least
 408  * 5 inodes nest depth for the ILOCK through rename, and we also have to support
 409  * XFS_ILOCK_PARENT, which gives 6 subclasses. Then we have XFS_ILOCK_RTBITMAP
 410  * and XFS_ILOCK_RTSUM, which are another 2 unique subclasses, so that's all
 411  * 8 subclasses supported by lockdep.
 412  *
 413  * This also means we have to number the sub-classes in the lowest bits of
 414  * the mask we keep, and we have to ensure we never exceed 3 bits of lockdep
 415  * mask and we can't use bit-masking to build the subclasses. What a mess.
 416  *
 417  * Bit layout:
 418  *
 419  * Bit          Lock Region
 420  * 16-19        XFS_IOLOCK_SHIFT dependencies
 421  * 20-23        XFS_MMAPLOCK_SHIFT dependencies
 422  * 24-31        XFS_ILOCK_SHIFT dependencies
 423  *
 424  * IOLOCK values
 425  *
 426  * 0-3          subclass value
 427  * 4-7          unused
 428  *
 429  * MMAPLOCK values
 430  *
 431  * 0-3          subclass value
 432  * 4-7          unused
 433  *
 434  * ILOCK values
 435  * 0-4          subclass values
 436  * 5            PARENT subclass (not nestable)
 437  * 6            RTBITMAP subclass (not nestable)
 438  * 7            RTSUM subclass (not nestable)
 439  *
 440  */
 441 #define XFS_IOLOCK_SHIFT                16
 442 #define XFS_IOLOCK_MAX_SUBCLASS         3
 443 #define XFS_IOLOCK_DEP_MASK             0x000f0000u
 444
 445 #define XFS_MMAPLOCK_SHIFT              20
 446 #define XFS_MMAPLOCK_NUMORDER           0
 447 #define XFS_MMAPLOCK_MAX_SUBCLASS       3
 448 #define XFS_MMAPLOCK_DEP_MASK           0x00f00000u
 449
 450 #define XFS_ILOCK_SHIFT                 24
 451 #define XFS_ILOCK_PARENT_VAL            5u
 452 #define XFS_ILOCK_MAX_SUBCLASS          (XFS_ILOCK_PARENT_VAL - 1)
 453 #define XFS_ILOCK_RTBITMAP_VAL          6u
 454 #define XFS_ILOCK_RTSUM_VAL             7u
 455 #define XFS_ILOCK_DEP_MASK              0xff000000u
 456 #define XFS_ILOCK_PARENT                (XFS_ILOCK_PARENT_VAL << XFS_ILOCK_SHIFT)
 457 #define XFS_ILOCK_RTBITMAP              (XFS_ILOCK_RTBITMAP_VAL << XFS_ILOCK_SHIFT)
 458 #define XFS_ILOCK_RTSUM                 (XFS_ILOCK_RTSUM_VAL << XFS_ILOCK_SHIFT)
 459
 460 #define XFS_LOCK_SUBCLASS_MASK  (XFS_IOLOCK_DEP_MASK | \
 461                                  XFS_MMAPLOCK_DEP_MASK | \
 462                                  XFS_ILOCK_DEP_MASK)
 463
 464 #define XFS_IOLOCK_DEP(flags)   (((flags) & XFS_IOLOCK_DEP_MASK) \
 465                                         >> XFS_IOLOCK_SHIFT)
 466 #define XFS_MMAPLOCK_DEP(flags) (((flags) & XFS_MMAPLOCK_DEP_MASK) \
 467                                         >> XFS_MMAPLOCK_SHIFT)
 468 #define XFS_ILOCK_DEP(flags)    (((flags) & XFS_ILOCK_DEP_MASK) \
 469                                         >> XFS_ILOCK_SHIFT)
 470
 471 /*
 472  * Layouts are broken in the BREAK_WRITE case to ensure that
 473  * layout-holders do not collide with local writes. Additionally,
 474  * layouts are broken in the BREAK_UNMAP case to make sure the
 475  * layout-holder has a consistent view of the file's extent map. While
 476  * BREAK_WRITE breaks can be satisfied by recalling FL_LAYOUT leases,
 477  * BREAK_UNMAP breaks additionally require waiting for busy dax-pages to
 478  * go idle.
 479  */
 480 enum layout_break_reason {
 481         BREAK_WRITE,
 482         BREAK_UNMAP,
 483 };
 484
 485 /*
 486  * For multiple groups support: if S_ISGID bit is set in the parent
 487  * directory, group of new file is set to that of the parent, and
 488  * new subdirectory gets S_ISGID bit from parent.
 489  */
 490 #define XFS_INHERIT_GID(pip)    \
 491         (xfs_has_grpid((pip)->i_mount) || (VFS_I(pip)->i_mode & S_ISGID))
 492
 493 int             xfs_release(struct xfs_inode *ip);
 494 int             xfs_inactive(struct xfs_inode *ip);
 495 int             xfs_lookup(struct xfs_inode *dp, const struct xfs_name *name,
 496                            struct xfs_inode **ipp, struct xfs_name *ci_name);
 497 int             xfs_create(struct mnt_idmap *idmap,
 498                            struct xfs_inode *dp, struct xfs_name *name,
 499                            umode_t mode, dev_t rdev, bool need_xattr,
 500                            struct xfs_inode **ipp);
 501 int             xfs_create_tmpfile(struct mnt_idmap *idmap,
 502                            struct xfs_inode *dp, umode_t mode,
 503                            struct xfs_inode **ipp);
 504 int             xfs_remove(struct xfs_inode *dp, struct xfs_name *name,
 505                            struct xfs_inode *ip);
 506 int             xfs_link(struct xfs_inode *tdp, struct xfs_inode *sip,
 507                          struct xfs_name *target_name);
 508 int             xfs_rename(struct mnt_idmap *idmap,
 509                            struct xfs_inode *src_dp, struct xfs_name *src_name,
 510                            struct xfs_inode *src_ip, struct xfs_inode *target_dp,
 511                            struct xfs_name *target_name,
 512                            struct xfs_inode *target_ip, unsigned int flags);
 513
 514 void            xfs_ilock(xfs_inode_t *, uint);
 515 int             xfs_ilock_nowait(xfs_inode_t *, uint);
 516 void            xfs_iunlock(xfs_inode_t *, uint);
 517 void            xfs_ilock_demote(xfs_inode_t *, uint);
 518 bool            xfs_isilocked(struct xfs_inode *, uint);
 519 uint            xfs_ilock_data_map_shared(struct xfs_inode *);
 520 uint            xfs_ilock_attr_map_shared(struct xfs_inode *);
 521
 522 uint            xfs_ip2xflags(struct xfs_inode *);
 523 int             xfs_ifree(struct xfs_trans *, struct xfs_inode *);
 524 int             xfs_itruncate_extents_flags(struct xfs_trans **,
 525                                 struct xfs_inode *, int, xfs_fsize_t, int);
 526 void            xfs_iext_realloc(xfs_inode_t *, int, int);
 527
 528 int             xfs_log_force_inode(struct xfs_inode *ip);
 529 void            xfs_iunpin_wait(xfs_inode_t *);
 530 #define xfs_ipincount(ip)       ((unsigned int) atomic_read(&ip->i_pincount))
 531
 532 int             xfs_iflush_cluster(struct xfs_buf *);
 533 void            xfs_lock_two_inodes(struct xfs_inode *ip0, uint ip0_mode,
 534                                 struct xfs_inode *ip1, uint ip1_mode);
 535
 536 xfs_extlen_t    xfs_get_extsz_hint(struct xfs_inode *ip);
 537 xfs_extlen_t    xfs_get_cowextsz_hint(struct xfs_inode *ip);
 538
 539 int xfs_init_new_inode(struct mnt_idmap *idmap, struct xfs_trans *tp,
 540                 struct xfs_inode *pip, xfs_ino_t ino, umode_t mode,
 541                 xfs_nlink_t nlink, dev_t rdev, prid_t prid, bool init_xattrs,
 542                 struct xfs_inode **ipp);
 543
 544 static inline int
 545 xfs_itruncate_extents(
 546         struct xfs_trans        **tpp,
 547         struct xfs_inode        *ip,
 548         int                     whichfork,
 549         xfs_fsize_t             new_size)
 550 {
 551         return xfs_itruncate_extents_flags(tpp, ip, whichfork, new_size, 0);
 552 }
 553
 554 /* from xfs_file.c */
 555 int     xfs_break_dax_layouts(struct inode *inode, bool *retry);
 556 int     xfs_break_layouts(struct inode *inode, uint *iolock,
 557                 enum layout_break_reason reason);
 558
 559 /* from xfs_iops.c */
 560 extern void xfs_setup_inode(struct xfs_inode *ip);
 561 extern void xfs_setup_iops(struct xfs_inode *ip);
 562 extern void xfs_diflags_to_iflags(struct xfs_inode *ip, bool init);
 563
 564 /*
 565  * When setting up a newly allocated inode, we need to call
 566  * xfs_finish_inode_setup() once the inode is fully instantiated at
 567  * the VFS level to prevent the rest of the world seeing the inode
 568  * before we've completed instantiation. Otherwise we can do it
 569  * the moment the inode lookup is complete.
 570  */
 571 static inline void xfs_finish_inode_setup(struct xfs_inode *ip)
 572 {
 573         xfs_iflags_clear(ip, XFS_INEW);
 574         barrier();
 575         unlock_new_inode(VFS_I(ip));
 576 }
 577
 578 static inline void xfs_setup_existing_inode(struct xfs_inode *ip)
 579 {
 580         xfs_setup_inode(ip);
 581         xfs_setup_iops(ip);
 582         xfs_finish_inode_setup(ip);
 583 }
 584
 585 void xfs_irele(struct xfs_inode *ip);
 586
 587 extern struct kmem_cache        *xfs_inode_cache;
 588
 589 /* The default CoW extent size hint. */
 590 #define XFS_DEFAULT_COWEXTSZ_HINT 32
 591
 592 bool xfs_inode_needs_inactive(struct xfs_inode *ip);
 593
 594 void xfs_end_io(struct work_struct *work);
 595
 596 int xfs_ilock2_io_mmap(struct xfs_inode *ip1, struct xfs_inode *ip2);
 597 void xfs_iunlock2_io_mmap(struct xfs_inode *ip1, struct xfs_inode *ip2);
 598
 599 static inline bool
 600 xfs_inode_unlinked_incomplete(
 601         struct xfs_inode        *ip)
 602 {
 603         return VFS_I(ip)->i_nlink == 0 && !xfs_inode_on_unlinked_list(ip);
 604 }
 605 int xfs_inode_reload_unlinked_bucket(struct xfs_trans *tp, struct xfs_inode *ip);
 606 int xfs_inode_reload_unlinked(struct xfs_inode *ip);
 607
 608 #endif  /* __XFS_INODE_H__ */