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  * 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         unsigned char           if_ext_max;     /* max # of extent records */
  70         union {
  71                 xfs_bmbt_rec_host_t *if_extents;/* linear map file exts */
  72                 xfs_ext_irec_t  *if_ext_irec;   /* irec map file exts */
  73                 char            *if_data;       /* inline file data */
  74         } if_u1;
  75         union {
  76                 xfs_bmbt_rec_host_t if_inline_ext[XFS_INLINE_EXTS];
  77                                                 /* very small file extents */
  78                 char            if_inline_data[XFS_INLINE_DATA];
  79                                                 /* very small file data */
  80                 xfs_dev_t       if_rdev;        /* dev number if special */
  81                 uuid_t          if_uuid;        /* mount point value */
  82         } if_u2;
  83 } xfs_ifork_t;
  84
  85 /*
  86  * Inode location information.  Stored in the inode and passed to
  87  * xfs_imap_to_bp() to get a buffer and dinode for a given inode.
  88  */
  89 struct xfs_imap {
  90         xfs_daddr_t     im_blkno;       /* starting BB of inode chunk */
  91         ushort          im_len;         /* length in BBs of inode chunk */
  92         ushort          im_boffset;     /* inode offset in block in bytes */
  93 };
  94
  95 /*
  96  * This is the xfs in-core inode structure.
  97  * Most of the on-disk inode is embedded in the i_d field.
  98  *
  99  * The extent pointers/inline file space, however, are managed
 100  * separately.  The memory for this information is pointed to by
 101  * the if_u1 unions depending on the type of the data.
 102  * This is used to linearize the array of extents for fast in-core
 103  * access.  This is used until the file's number of extents
 104  * surpasses XFS_MAX_INCORE_EXTENTS, at which point all extent pointers
 105  * are accessed through the buffer cache.
 106  *
 107  * Other state kept in the in-core inode is used for identification,
 108  * locking, transactional updating, etc of the inode.
 109  *
 110  * Generally, we do not want to hold the i_rlock while holding the
 111  * i_ilock. Hierarchy is i_iolock followed by i_rlock.
 112  *
 113  * xfs_iptr_t contains all the inode fields up to and including the
 114  * i_mnext and i_mprev fields, it is used as a marker in the inode
 115  * chain off the mount structure by xfs_sync calls.
 116  */
 117
 118 typedef struct xfs_ictimestamp {
 119         __int32_t       t_sec;          /* timestamp seconds */
 120         __int32_t       t_nsec;         /* timestamp nanoseconds */
 121 } xfs_ictimestamp_t;
 122
 123 /*
 124  * NOTE:  This structure must be kept identical to struct xfs_dinode
 125  *        in xfs_dinode.h except for the endianness annotations.
 126  */
 127 typedef struct xfs_icdinode {
 128         __uint16_t      di_magic;       /* inode magic # = XFS_DINODE_MAGIC */
 129         __uint16_t      di_mode;        /* mode and type of file */
 130         __int8_t        di_version;     /* inode version */
 131         __int8_t        di_format;      /* format of di_c data */
 132         __uint16_t      di_onlink;      /* old number of links to file */
 133         __uint32_t      di_uid;         /* owner's user id */
 134         __uint32_t      di_gid;         /* owner's group id */
 135         __uint32_t      di_nlink;       /* number of links to file */
 136         __uint16_t      di_projid_lo;   /* lower part of owner's project id */
 137         __uint16_t      di_projid_hi;   /* higher part of owner's project id */
 138         __uint8_t       di_pad[6];      /* unused, zeroed space */
 139         __uint16_t      di_flushiter;   /* incremented on flush */
 140         xfs_ictimestamp_t di_atime;     /* time last accessed */
 141         xfs_ictimestamp_t di_mtime;     /* time last modified */
 142         xfs_ictimestamp_t di_ctime;     /* time created/inode modified */
 143         xfs_fsize_t     di_size;        /* number of bytes in file */
 144         xfs_drfsbno_t   di_nblocks;     /* # of direct & btree blocks used */
 145         xfs_extlen_t    di_extsize;     /* basic/minimum extent size for file */
 146         xfs_extnum_t    di_nextents;    /* number of extents in data fork */
 147         xfs_aextnum_t   di_anextents;   /* number of extents in attribute fork*/
 148         __uint8_t       di_forkoff;     /* attr fork offs, <<3 for 64b align */
 149         __int8_t        di_aformat;     /* format of attr fork's data */
 150         __uint32_t      di_dmevmask;    /* DMIG event mask */
 151         __uint16_t      di_dmstate;     /* DMIG state info */
 152         __uint16_t      di_flags;       /* random flags, XFS_DIFLAG_... */
 153         __uint32_t      di_gen;         /* generation number */
 154 } xfs_icdinode_t;
 155
 156 /*
 157  * Flags for xfs_ichgtime().
 158  */
 159 #define XFS_ICHGTIME_MOD        0x1     /* data fork modification timestamp */
 160 #define XFS_ICHGTIME_CHG        0x2     /* inode field change timestamp */
 161
 162 /*
 163  * Per-fork incore inode flags.
 164  */
 165 #define XFS_IFINLINE    0x01    /* Inline data is read in */
 166 #define XFS_IFEXTENTS   0x02    /* All extent pointers are read in */
 167 #define XFS_IFBROOT     0x04    /* i_broot points to the bmap b-tree root */
 168 #define XFS_IFEXTIREC   0x08    /* Indirection array of extent blocks */
 169
 170 /*
 171  * Fork handling.
 172  */
 173
 174 #define XFS_IFORK_Q(ip)                 ((ip)->i_d.di_forkoff != 0)
 175 #define XFS_IFORK_BOFF(ip)              ((int)((ip)->i_d.di_forkoff << 3))
 176
 177 #define XFS_IFORK_PTR(ip,w)             \
 178         ((w) == XFS_DATA_FORK ? \
 179                 &(ip)->i_df : \
 180                 (ip)->i_afp)
 181 #define XFS_IFORK_DSIZE(ip) \
 182         (XFS_IFORK_Q(ip) ? \
 183                 XFS_IFORK_BOFF(ip) : \
 184                 XFS_LITINO((ip)->i_mount))
 185 #define XFS_IFORK_ASIZE(ip) \
 186         (XFS_IFORK_Q(ip) ? \
 187                 XFS_LITINO((ip)->i_mount) - XFS_IFORK_BOFF(ip) : \
 188                 0)
 189 #define XFS_IFORK_SIZE(ip,w) \
 190         ((w) == XFS_DATA_FORK ? \
 191                 XFS_IFORK_DSIZE(ip) : \
 192                 XFS_IFORK_ASIZE(ip))
 193 #define XFS_IFORK_FORMAT(ip,w) \
 194         ((w) == XFS_DATA_FORK ? \
 195                 (ip)->i_d.di_format : \
 196                 (ip)->i_d.di_aformat)
 197 #define XFS_IFORK_FMT_SET(ip,w,n) \
 198         ((w) == XFS_DATA_FORK ? \
 199                 ((ip)->i_d.di_format = (n)) : \
 200                 ((ip)->i_d.di_aformat = (n)))
 201 #define XFS_IFORK_NEXTENTS(ip,w) \
 202         ((w) == XFS_DATA_FORK ? \
 203                 (ip)->i_d.di_nextents : \
 204                 (ip)->i_d.di_anextents)
 205 #define XFS_IFORK_NEXT_SET(ip,w,n) \
 206         ((w) == XFS_DATA_FORK ? \
 207                 ((ip)->i_d.di_nextents = (n)) : \
 208                 ((ip)->i_d.di_anextents = (n)))
 209
 210
 211
 212 #ifdef __KERNEL__
 213
 214 struct xfs_buf;
 215 struct xfs_bmap_free;
 216 struct xfs_bmbt_irec;
 217 struct xfs_inode_log_item;
 218 struct xfs_mount;
 219 struct xfs_trans;
 220 struct xfs_dquot;
 221
 222 typedef struct xfs_inode {
 223         /* Inode linking and identification information. */
 224         struct xfs_mount        *i_mount;       /* fs mount struct ptr */
 225         struct xfs_dquot        *i_udquot;      /* user dquot */
 226         struct xfs_dquot        *i_gdquot;      /* group dquot */
 227
 228         /* Inode location stuff */
 229         xfs_ino_t               i_ino;          /* inode number (agno/agino)*/
 230         struct xfs_imap         i_imap;         /* location for xfs_imap() */
 231
 232         /* Extent information. */
 233         xfs_ifork_t             *i_afp;         /* attribute fork pointer */
 234         xfs_ifork_t             i_df;           /* data fork */
 235
 236         /* Transaction and locking information. */
 237         struct xfs_inode_log_item *i_itemp;     /* logging information */
 238         mrlock_t                i_lock;         /* inode lock */
 239         mrlock_t                i_iolock;       /* inode IO lock */
 240         struct completion       i_flush;        /* inode flush completion q */
 241         atomic_t                i_pincount;     /* inode pin count */
 242         wait_queue_head_t       i_ipin_wait;    /* inode pinning wait queue */
 243         spinlock_t              i_flags_lock;   /* inode i_flags lock */
 244         /* Miscellaneous state. */
 245         unsigned short          i_flags;        /* see defined flags below */
 246         unsigned char           i_update_core;  /* timestamps/size is dirty */
 247         unsigned int            i_delayed_blks; /* count of delay alloc blks */
 248
 249         xfs_icdinode_t          i_d;            /* most of ondisk inode */
 250
 251         xfs_fsize_t             i_size;         /* in-memory size */
 252         xfs_fsize_t             i_new_size;     /* size when write completes */
 253
 254         /* VFS inode */
 255         struct inode            i_vnode;        /* embedded VFS inode */
 256 } xfs_inode_t;
 257
 258 #define XFS_ISIZE(ip)   S_ISREG((ip)->i_d.di_mode) ? \
 259                                 (ip)->i_size : (ip)->i_d.di_size;
 260
 261 /* Convert from vfs inode to xfs inode */
 262 static inline struct xfs_inode *XFS_I(struct inode *inode)
 263 {
 264         return container_of(inode, struct xfs_inode, i_vnode);
 265 }
 266
 267 /* convert from xfs inode to vfs inode */
 268 static inline struct inode *VFS_I(struct xfs_inode *ip)
 269 {
 270         return &ip->i_vnode;
 271 }
 272
 273 /*
 274  * i_flags helper functions
 275  */
 276 static inline void
 277 __xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
 278 {
 279         ip->i_flags |= flags;
 280 }
 281
 282 static inline void
 283 xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
 284 {
 285         spin_lock(&ip->i_flags_lock);
 286         __xfs_iflags_set(ip, flags);
 287         spin_unlock(&ip->i_flags_lock);
 288 }
 289
 290 static inline void
 291 xfs_iflags_clear(xfs_inode_t *ip, unsigned short flags)
 292 {
 293         spin_lock(&ip->i_flags_lock);
 294         ip->i_flags &= ~flags;
 295         spin_unlock(&ip->i_flags_lock);
 296 }
 297
 298 static inline int
 299 __xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
 300 {
 301         return (ip->i_flags & flags);
 302 }
 303
 304 static inline int
 305 xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
 306 {
 307         int ret;
 308         spin_lock(&ip->i_flags_lock);
 309         ret = __xfs_iflags_test(ip, flags);
 310         spin_unlock(&ip->i_flags_lock);
 311         return ret;
 312 }
 313
 314 static inline int
 315 xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned short flags)
 316 {
 317         int ret;
 318
 319         spin_lock(&ip->i_flags_lock);
 320         ret = ip->i_flags & flags;
 321         if (ret)
 322                 ip->i_flags &= ~flags;
 323         spin_unlock(&ip->i_flags_lock);
 324         return ret;
 325 }
 326
 327 /*
 328  * Project quota id helpers (previously projid was 16bit only
 329  * and using two 16bit values to hold new 32bit projid was chosen
 330  * to retain compatibility with "old" filesystems).
 331  */
 332 static inline prid_t
 333 xfs_get_projid(struct xfs_inode *ip)
 334 {
 335         return (prid_t)ip->i_d.di_projid_hi << 16 | ip->i_d.di_projid_lo;
 336 }
 337
 338 static inline void
 339 xfs_set_projid(struct xfs_inode *ip,
 340                 prid_t projid)
 341 {
 342         ip->i_d.di_projid_hi = (__uint16_t) (projid >> 16);
 343         ip->i_d.di_projid_lo = (__uint16_t) (projid & 0xffff);
 344 }
 345
 346 /*
 347  * Manage the i_flush queue embedded in the inode.  This completion
 348  * queue synchronizes processes attempting to flush the in-core
 349  * inode back to disk.
 350  */
 351 static inline void xfs_iflock(xfs_inode_t *ip)
 352 {
 353         wait_for_completion(&ip->i_flush);
 354 }
 355
 356 static inline int xfs_iflock_nowait(xfs_inode_t *ip)
 357 {
 358         return try_wait_for_completion(&ip->i_flush);
 359 }
 360
 361 static inline void xfs_ifunlock(xfs_inode_t *ip)
 362 {
 363         complete(&ip->i_flush);
 364 }
 365
 366 /*
 367  * In-core inode flags.
 368  */
 369 #define XFS_IRECLAIM            0x0001  /* started reclaiming this inode */
 370 #define XFS_ISTALE              0x0002  /* inode has been staled */
 371 #define XFS_IRECLAIMABLE        0x0004  /* inode can be reclaimed */
 372 #define XFS_INEW                0x0008  /* inode has just been allocated */
 373 #define XFS_IFILESTREAM         0x0010  /* inode is in a filestream directory */
 374 #define XFS_ITRUNCATED          0x0020  /* truncated down so flush-on-close */
 375 #define XFS_IDIRTY_RELEASE      0x0040  /* dirty release already seen */
 376
 377 /*
 378  * Per-lifetime flags need to be reset when re-using a reclaimable inode during
 379  * inode lookup. Thi prevents unintended behaviour on the new inode from
 380  * ocurring.
 381  */
 382 #define XFS_IRECLAIM_RESET_FLAGS        \
 383         (XFS_IRECLAIMABLE | XFS_IRECLAIM | \
 384          XFS_IDIRTY_RELEASE | XFS_ITRUNCATED | \
 385          XFS_IFILESTREAM);
 386
 387 /*
 388  * Flags for inode locking.
 389  * Bit ranges:  1<<1  - 1<<16-1 -- iolock/ilock modes (bitfield)
 390  *              1<<16 - 1<<32-1 -- lockdep annotation (integers)
 391  */
 392 #define XFS_IOLOCK_EXCL         (1<<0)
 393 #define XFS_IOLOCK_SHARED       (1<<1)
 394 #define XFS_ILOCK_EXCL          (1<<2)
 395 #define XFS_ILOCK_SHARED        (1<<3)
 396 #define XFS_IUNLOCK_NONOTIFY    (1<<4)
 397
 398 #define XFS_LOCK_MASK           (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \
 399                                 | XFS_ILOCK_EXCL | XFS_ILOCK_SHARED)
 400
 401 #define XFS_LOCK_FLAGS \
 402         { XFS_IOLOCK_EXCL,      "IOLOCK_EXCL" }, \
 403         { XFS_IOLOCK_SHARED,    "IOLOCK_SHARED" }, \
 404         { XFS_ILOCK_EXCL,       "ILOCK_EXCL" }, \
 405         { XFS_ILOCK_SHARED,     "ILOCK_SHARED" }, \
 406         { XFS_IUNLOCK_NONOTIFY, "IUNLOCK_NONOTIFY" }
 407
 408
 409 /*
 410  * Flags for lockdep annotations.
 411  *
 412  * XFS_LOCK_PARENT - for directory operations that require locking a
 413  * parent directory inode and a child entry inode.  The parent gets locked
 414  * with this flag so it gets a lockdep subclass of 1 and the child entry
 415  * lock will have a lockdep subclass of 0.
 416  *
 417  * XFS_LOCK_RTBITMAP/XFS_LOCK_RTSUM - the realtime device bitmap and summary
 418  * inodes do not participate in the normal lock order, and thus have their
 419  * own subclasses.
 420  *
 421  * XFS_LOCK_INUMORDER - for locking several inodes at the some time
 422  * with xfs_lock_inodes().  This flag is used as the starting subclass
 423  * and each subsequent lock acquired will increment the subclass by one.
 424  * So the first lock acquired will have a lockdep subclass of 4, the
 425  * second lock will have a lockdep subclass of 5, and so on. It is
 426  * the responsibility of the class builder to shift this to the correct
 427  * portion of the lock_mode lockdep mask.
 428  */
 429 #define XFS_LOCK_PARENT         1
 430 #define XFS_LOCK_RTBITMAP       2
 431 #define XFS_LOCK_RTSUM          3
 432 #define XFS_LOCK_INUMORDER      4
 433
 434 #define XFS_IOLOCK_SHIFT        16
 435 #define XFS_IOLOCK_PARENT       (XFS_LOCK_PARENT << XFS_IOLOCK_SHIFT)
 436
 437 #define XFS_ILOCK_SHIFT         24
 438 #define XFS_ILOCK_PARENT        (XFS_LOCK_PARENT << XFS_ILOCK_SHIFT)
 439 #define XFS_ILOCK_RTBITMAP      (XFS_LOCK_RTBITMAP << XFS_ILOCK_SHIFT)
 440 #define XFS_ILOCK_RTSUM         (XFS_LOCK_RTSUM << XFS_ILOCK_SHIFT)
 441
 442 #define XFS_IOLOCK_DEP_MASK     0x00ff0000
 443 #define XFS_ILOCK_DEP_MASK      0xff000000
 444 #define XFS_LOCK_DEP_MASK       (XFS_IOLOCK_DEP_MASK | XFS_ILOCK_DEP_MASK)
 445
 446 #define XFS_IOLOCK_DEP(flags)   (((flags) & XFS_IOLOCK_DEP_MASK) >> XFS_IOLOCK_SHIFT)
 447 #define XFS_ILOCK_DEP(flags)    (((flags) & XFS_ILOCK_DEP_MASK) >> XFS_ILOCK_SHIFT)
 448
 449 extern struct lock_class_key xfs_iolock_reclaimable;
 450
 451 /*
 452  * For multiple groups support: if S_ISGID bit is set in the parent
 453  * directory, group of new file is set to that of the parent, and
 454  * new subdirectory gets S_ISGID bit from parent.
 455  */
 456 #define XFS_INHERIT_GID(pip)    \
 457         (((pip)->i_mount->m_flags & XFS_MOUNT_GRPID) || \
 458          ((pip)->i_d.di_mode & S_ISGID))
 459
 460 /*
 461  * xfs_iget.c prototypes.
 462  */
 463 int             xfs_iget(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
 464                          uint, uint, xfs_inode_t **);
 465 void            xfs_ilock(xfs_inode_t *, uint);
 466 int             xfs_ilock_nowait(xfs_inode_t *, uint);
 467 void            xfs_iunlock(xfs_inode_t *, uint);
 468 void            xfs_ilock_demote(xfs_inode_t *, uint);
 469 int             xfs_isilocked(xfs_inode_t *, uint);
 470 uint            xfs_ilock_map_shared(xfs_inode_t *);
 471 void            xfs_iunlock_map_shared(xfs_inode_t *, uint);
 472 void            xfs_inode_free(struct xfs_inode *ip);
 473
 474 /*
 475  * xfs_inode.c prototypes.
 476  */
 477 int             xfs_ialloc(struct xfs_trans *, xfs_inode_t *, umode_t,
 478                            xfs_nlink_t, xfs_dev_t, prid_t, int,
 479                            struct xfs_buf **, boolean_t *, xfs_inode_t **);
 480
 481 uint            xfs_ip2xflags(struct xfs_inode *);
 482 uint            xfs_dic2xflags(struct xfs_dinode *);
 483 int             xfs_ifree(struct xfs_trans *, xfs_inode_t *,
 484                            struct xfs_bmap_free *);
 485 int             xfs_itruncate_extents(struct xfs_trans **, struct xfs_inode *,
 486                                       int, xfs_fsize_t);
 487 int             xfs_iunlink(struct xfs_trans *, xfs_inode_t *);
 488
 489 void            xfs_iext_realloc(xfs_inode_t *, int, int);
 490 void            xfs_iunpin_wait(xfs_inode_t *);
 491 int             xfs_iflush(xfs_inode_t *, uint);
 492 void            xfs_promote_inode(struct xfs_inode *);
 493 void            xfs_lock_inodes(xfs_inode_t **, int, uint);
 494 void            xfs_lock_two_inodes(xfs_inode_t *, xfs_inode_t *, uint);
 495
 496 void            xfs_synchronize_times(xfs_inode_t *);
 497 void            xfs_mark_inode_dirty(xfs_inode_t *);
 498 void            xfs_mark_inode_dirty_sync(xfs_inode_t *);
 499
 500 #define IHOLD(ip) \
 501 do { \
 502         ASSERT(atomic_read(&VFS_I(ip)->i_count) > 0) ; \
 503         ihold(VFS_I(ip)); \
 504         trace_xfs_ihold(ip, _THIS_IP_); \
 505 } while (0)
 506
 507 #define IRELE(ip) \
 508 do { \
 509         trace_xfs_irele(ip, _THIS_IP_); \
 510         iput(VFS_I(ip)); \
 511 } while (0)
 512
 513 #endif /* __KERNEL__ */
 514
 515 /*
 516  * Flags for xfs_iget()
 517  */
 518 #define XFS_IGET_CREATE         0x1
 519 #define XFS_IGET_UNTRUSTED      0x2
 520
 521 int             xfs_inotobp(struct xfs_mount *, struct xfs_trans *,
 522                             xfs_ino_t, struct xfs_dinode **,
 523                             struct xfs_buf **, int *, uint);
 524 int             xfs_itobp(struct xfs_mount *, struct xfs_trans *,
 525                           struct xfs_inode *, struct xfs_dinode **,
 526                           struct xfs_buf **, uint);
 527 int             xfs_iread(struct xfs_mount *, struct xfs_trans *,
 528                           struct xfs_inode *, uint);
 529 void            xfs_dinode_to_disk(struct xfs_dinode *,
 530                                    struct xfs_icdinode *);
 531 void            xfs_idestroy_fork(struct xfs_inode *, int);
 532 void            xfs_idata_realloc(struct xfs_inode *, int, int);
 533 void            xfs_iroot_realloc(struct xfs_inode *, int, int);
 534 int             xfs_iread_extents(struct xfs_trans *, struct xfs_inode *, int);
 535 int             xfs_iextents_copy(struct xfs_inode *, xfs_bmbt_rec_t *, int);
 536
 537 xfs_bmbt_rec_host_t *xfs_iext_get_ext(xfs_ifork_t *, xfs_extnum_t);
 538 void            xfs_iext_insert(xfs_inode_t *, xfs_extnum_t, xfs_extnum_t,
 539                                 xfs_bmbt_irec_t *, int);
 540 void            xfs_iext_add(xfs_ifork_t *, xfs_extnum_t, int);
 541 void            xfs_iext_add_indirect_multi(xfs_ifork_t *, int, xfs_extnum_t, int);
 542 void            xfs_iext_remove(xfs_inode_t *, xfs_extnum_t, int, int);
 543 void            xfs_iext_remove_inline(xfs_ifork_t *, xfs_extnum_t, int);
 544 void            xfs_iext_remove_direct(xfs_ifork_t *, xfs_extnum_t, int);
 545 void            xfs_iext_remove_indirect(xfs_ifork_t *, xfs_extnum_t, int);
 546 void            xfs_iext_realloc_direct(xfs_ifork_t *, int);
 547 void            xfs_iext_direct_to_inline(xfs_ifork_t *, xfs_extnum_t);
 548 void            xfs_iext_inline_to_direct(xfs_ifork_t *, int);
 549 void            xfs_iext_destroy(xfs_ifork_t *);
 550 xfs_bmbt_rec_host_t *xfs_iext_bno_to_ext(xfs_ifork_t *, xfs_fileoff_t, int *);
 551 xfs_ext_irec_t  *xfs_iext_bno_to_irec(xfs_ifork_t *, xfs_fileoff_t, int *);
 552 xfs_ext_irec_t  *xfs_iext_idx_to_irec(xfs_ifork_t *, xfs_extnum_t *, int *, int);
 553 void            xfs_iext_irec_init(xfs_ifork_t *);
 554 xfs_ext_irec_t *xfs_iext_irec_new(xfs_ifork_t *, int);
 555 void            xfs_iext_irec_remove(xfs_ifork_t *, int);
 556 void            xfs_iext_irec_compact(xfs_ifork_t *);
 557 void            xfs_iext_irec_compact_pages(xfs_ifork_t *);
 558 void            xfs_iext_irec_compact_full(xfs_ifork_t *);
 559 void            xfs_iext_irec_update_extoffs(xfs_ifork_t *, int, int);
 560
 561 #define xfs_ipincount(ip)       ((unsigned int) atomic_read(&ip->i_pincount))
 562
 563 #if defined(DEBUG)
 564 void            xfs_inobp_check(struct xfs_mount *, struct xfs_buf *);
 565 #else
 566 #define xfs_inobp_check(mp, bp)
 567 #endif /* DEBUG */
 568
 569 extern struct kmem_zone *xfs_ifork_zone;
 570 extern struct kmem_zone *xfs_inode_zone;
 571 extern struct kmem_zone *xfs_ili_zone;
 572
 573 #endif  /* __XFS_INODE_H__ */