fs/xfs/xfs_inode.h

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