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 /*
  22  * Fork identifiers.
  23  */
  24 #define XFS_DATA_FORK   0
  25 #define XFS_ATTR_FORK   1
  26
  27 /*
  28  * The following xfs_ext_irec_t struct introduces a second (top) level
  29  * to the in-core extent allocation scheme. These structs are allocated
  30  * in a contiguous block, creating an indirection array where each entry
  31  * (irec) contains a pointer to a buffer of in-core extent records which
  32  * it manages. Each extent buffer is 4k in size, since 4k is the system
  33  * page size on Linux i386 and systems with larger page sizes don't seem
  34  * to gain much, if anything, by using their native page size as the
  35  * extent buffer size. Also, using 4k extent buffers everywhere provides
  36  * a consistent interface for CXFS across different platforms.
  37  *
  38  * There is currently no limit on the number of irec's (extent lists)
  39  * allowed, so heavily fragmented files may require an indirection array
  40  * which spans multiple system pages of memory. The number of extents
  41  * which would require this amount of contiguous memory is very large
  42  * and should not cause problems in the foreseeable future. However,
  43  * if the memory needed for the contiguous array ever becomes a problem,
  44  * it is possible that a third level of indirection may be required.
  45  */
  46 typedef struct xfs_ext_irec {
  47         xfs_bmbt_rec_t  *er_extbuf;     /* block of extent records */
  48         xfs_extnum_t    er_extoff;      /* extent offset in file */
  49         xfs_extnum_t    er_extcount;    /* number of extents in page/block */
  50 } xfs_ext_irec_t;
  51
  52 /*
  53  * File incore extent information, present for each of data & attr forks.
  54  */
  55 #define XFS_IEXT_BUFSZ          4096
  56 #define XFS_LINEAR_EXTS         (XFS_IEXT_BUFSZ / (uint)sizeof(xfs_bmbt_rec_t))
  57 #define XFS_INLINE_EXTS         2
  58 #define XFS_INLINE_DATA         32
  59 typedef struct xfs_ifork {
  60         int                     if_bytes;       /* bytes in if_u1 */
  61         int                     if_real_bytes;  /* bytes allocated in if_u1 */
  62         xfs_bmbt_block_t        *if_broot;      /* file's incore btree root */
  63         short                   if_broot_bytes; /* bytes allocated for root */
  64         unsigned char           if_flags;       /* per-fork flags */
  65         unsigned char           if_ext_max;     /* max # of extent records */
  66         xfs_extnum_t            if_lastex;      /* last if_extents used */
  67         union {
  68                 xfs_bmbt_rec_t  *if_extents;    /* linear map file exts */
  69                 xfs_ext_irec_t  *if_ext_irec;   /* irec map file exts */
  70                 char            *if_data;       /* inline file data */
  71         } if_u1;
  72         union {
  73                 xfs_bmbt_rec_t  if_inline_ext[XFS_INLINE_EXTS];
  74                                                 /* very small file extents */
  75                 char            if_inline_data[XFS_INLINE_DATA];
  76                                                 /* very small file data */
  77                 xfs_dev_t       if_rdev;        /* dev number if special */
  78                 uuid_t          if_uuid;        /* mount point value */
  79         } if_u2;
  80 } xfs_ifork_t;
  81
  82 /*
  83  * Flags for xfs_ichgtime().
  84  */
  85 #define XFS_ICHGTIME_MOD        0x1     /* data fork modification timestamp */
  86 #define XFS_ICHGTIME_ACC        0x2     /* data fork access timestamp */
  87 #define XFS_ICHGTIME_CHG        0x4     /* inode field change timestamp */
  88
  89 /*
  90  * Per-fork incore inode flags.
  91  */
  92 #define XFS_IFINLINE    0x01    /* Inline data is read in */
  93 #define XFS_IFEXTENTS   0x02    /* All extent pointers are read in */
  94 #define XFS_IFBROOT     0x04    /* i_broot points to the bmap b-tree root */
  95 #define XFS_IFEXTIREC   0x08    /* Indirection array of extent blocks */
  96
  97 /*
  98  * Flags for xfs_itobp(), xfs_imap() and xfs_dilocate().
  99  */
 100 #define XFS_IMAP_LOOKUP         0x1
 101 #define XFS_IMAP_BULKSTAT       0x2
 102
 103 #ifdef __KERNEL__
 104 struct bhv_desc;
 105 struct bhv_vnode;
 106 struct cred;
 107 struct ktrace;
 108 struct xfs_buf;
 109 struct xfs_bmap_free;
 110 struct xfs_bmbt_irec;
 111 struct xfs_bmbt_block;
 112 struct xfs_inode;
 113 struct xfs_inode_log_item;
 114 struct xfs_mount;
 115 struct xfs_trans;
 116 struct xfs_dquot;
 117
 118 #if defined(XFS_ILOCK_TRACE)
 119 #define XFS_ILOCK_KTRACE_SIZE   32
 120 extern ktrace_t *xfs_ilock_trace_buf;
 121 extern void xfs_ilock_trace(struct xfs_inode *, int, unsigned int, inst_t *);
 122 #else
 123 #define xfs_ilock_trace(i,n,f,ra)
 124 #endif
 125
 126 typedef struct dm_attrs_s {
 127         __uint32_t      da_dmevmask;    /* DMIG event mask */
 128         __uint16_t      da_dmstate;     /* DMIG state info */
 129         __uint16_t      da_pad;         /* DMIG extra padding */
 130 } dm_attrs_t;
 131
 132 typedef struct xfs_iocore {
 133         void                    *io_obj;        /* pointer to container
 134                                                  * inode or dcxvn structure */
 135         struct xfs_mount        *io_mount;      /* fs mount struct ptr */
 136 #ifdef DEBUG
 137         mrlock_t                *io_lock;       /* inode IO lock */
 138         mrlock_t                *io_iolock;     /* inode IO lock */
 139 #endif
 140
 141         /* I/O state */
 142         xfs_fsize_t             io_new_size;    /* sz when write completes */
 143
 144         /* Miscellaneous state. */
 145         unsigned int            io_flags;       /* IO related flags */
 146
 147         /* DMAPI state */
 148         dm_attrs_t              io_dmattrs;
 149
 150 } xfs_iocore_t;
 151
 152 #define        io_dmevmask     io_dmattrs.da_dmevmask
 153 #define        io_dmstate      io_dmattrs.da_dmstate
 154
 155 #define XFS_IO_INODE(io)        ((xfs_inode_t *) ((io)->io_obj))
 156 #define XFS_IO_DCXVN(io)        ((dcxvn_t *) ((io)->io_obj))
 157
 158 /*
 159  * Flags in the flags field
 160  */
 161
 162 #define XFS_IOCORE_RT           0x1
 163
 164 /*
 165  * xfs_iocore prototypes
 166  */
 167
 168 extern void xfs_iocore_inode_init(struct xfs_inode *);
 169 extern void xfs_iocore_inode_reinit(struct xfs_inode *);
 170
 171
 172 /*
 173  * This is the type used in the xfs inode hash table.
 174  * An array of these is allocated for each mounted
 175  * file system to hash the inodes for that file system.
 176  */
 177 typedef struct xfs_ihash {
 178         struct xfs_inode        *ih_next;
 179         rwlock_t                ih_lock;
 180         uint                    ih_version;
 181 } xfs_ihash_t;
 182
 183 #define XFS_IHASH(mp,ino) ((mp)->m_ihash + (((uint)(ino)) % (mp)->m_ihsize))
 184
 185 /*
 186  * This is the xfs inode cluster hash.  This hash is used by xfs_iflush to
 187  * find inodes that share a cluster and can be flushed to disk at the same
 188  * time.
 189  */
 190 typedef struct xfs_chashlist {
 191         struct xfs_chashlist    *chl_next;
 192         struct xfs_chashlist    *chl_prev;
 193         struct xfs_inode        *chl_ip;
 194         xfs_daddr_t             chl_blkno;      /* starting block number of
 195                                                  * the cluster */
 196         struct xfs_buf          *chl_buf;       /* the inode buffer */
 197 } xfs_chashlist_t;
 198
 199 typedef struct xfs_chash {
 200         xfs_chashlist_t         *ch_list;
 201         lock_t                  ch_lock;
 202 } xfs_chash_t;
 203
 204 #define XFS_CHASH(mp,blk) ((mp)->m_chash + (((uint)blk) % (mp)->m_chsize))
 205
 206
 207 /*
 208  * This is the xfs in-core inode structure.
 209  * Most of the on-disk inode is embedded in the i_d field.
 210  *
 211  * The extent pointers/inline file space, however, are managed
 212  * separately.  The memory for this information is pointed to by
 213  * the if_u1 unions depending on the type of the data.
 214  * This is used to linearize the array of extents for fast in-core
 215  * access.  This is used until the file's number of extents
 216  * surpasses XFS_MAX_INCORE_EXTENTS, at which point all extent pointers
 217  * are accessed through the buffer cache.
 218  *
 219  * Other state kept in the in-core inode is used for identification,
 220  * locking, transactional updating, etc of the inode.
 221  *
 222  * Generally, we do not want to hold the i_rlock while holding the
 223  * i_ilock. Hierarchy is i_iolock followed by i_rlock.
 224  *
 225  * xfs_iptr_t contains all the inode fields upto and including the
 226  * i_mnext and i_mprev fields, it is used as a marker in the inode
 227  * chain off the mount structure by xfs_sync calls.
 228  */
 229
 230 typedef struct {
 231         struct xfs_ihash        *ip_hash;       /* pointer to hash header */
 232         struct xfs_inode        *ip_next;       /* inode hash link forw */
 233         struct xfs_inode        *ip_mnext;      /* next inode in mount list */
 234         struct xfs_inode        *ip_mprev;      /* ptr to prev inode */
 235         struct xfs_inode        **ip_prevp;     /* ptr to prev i_next */
 236         struct xfs_mount        *ip_mount;      /* fs mount struct ptr */
 237 } xfs_iptr_t;
 238
 239 typedef struct xfs_inode {
 240         /* Inode linking and identification information. */
 241         struct xfs_ihash        *i_hash;        /* pointer to hash header */
 242         struct xfs_inode        *i_next;        /* inode hash link forw */
 243         struct xfs_inode        *i_mnext;       /* next inode in mount list */
 244         struct xfs_inode        *i_mprev;       /* ptr to prev inode */
 245         struct xfs_inode        **i_prevp;      /* ptr to prev i_next */
 246         struct xfs_mount        *i_mount;       /* fs mount struct ptr */
 247         struct list_head        i_reclaim;      /* reclaim list */
 248         struct bhv_desc         i_bhv_desc;     /* inode behavior descriptor*/
 249         struct xfs_dquot        *i_udquot;      /* user dquot */
 250         struct xfs_dquot        *i_gdquot;      /* group dquot */
 251
 252         /* Inode location stuff */
 253         xfs_ino_t               i_ino;          /* inode number (agno/agino)*/
 254         xfs_daddr_t             i_blkno;        /* blkno of inode buffer */
 255         ushort                  i_len;          /* len of inode buffer */
 256         ushort                  i_boffset;      /* off of inode in buffer */
 257
 258         /* Extent information. */
 259         xfs_ifork_t             *i_afp;         /* attribute fork pointer */
 260         xfs_ifork_t             i_df;           /* data fork */
 261
 262         /* Transaction and locking information. */
 263         struct xfs_trans        *i_transp;      /* ptr to owning transaction*/
 264         struct xfs_inode_log_item *i_itemp;     /* logging information */
 265         mrlock_t                i_lock;         /* inode lock */
 266         mrlock_t                i_iolock;       /* inode IO lock */
 267         sema_t                  i_flock;        /* inode flush lock */
 268         atomic_t                i_pincount;     /* inode pin count */
 269         wait_queue_head_t       i_ipin_wait;    /* inode pinning wait queue */
 270 #ifdef HAVE_REFCACHE
 271         struct xfs_inode        **i_refcache;   /* ptr to entry in ref cache */
 272         struct xfs_inode        *i_release;     /* inode to unref */
 273 #endif
 274         /* I/O state */
 275         xfs_iocore_t            i_iocore;       /* I/O core */
 276
 277         /* Miscellaneous state. */
 278         unsigned short          i_flags;        /* see defined flags below */
 279         unsigned char           i_update_core;  /* timestamps/size is dirty */
 280         unsigned char           i_update_size;  /* di_size field is dirty */
 281         unsigned int            i_gen;          /* generation count */
 282         unsigned int            i_delayed_blks; /* count of delay alloc blks */
 283
 284         xfs_dinode_core_t       i_d;            /* most of ondisk inode */
 285         xfs_chashlist_t         *i_chash;       /* cluster hash list header */
 286         struct xfs_inode        *i_cnext;       /* cluster hash link forward */
 287         struct xfs_inode        *i_cprev;       /* cluster hash link backward */
 288
 289         /* Trace buffers per inode. */
 290 #ifdef XFS_BMAP_TRACE
 291         struct ktrace           *i_xtrace;      /* inode extent list trace */
 292 #endif
 293 #ifdef XFS_BMBT_TRACE
 294         struct ktrace           *i_btrace;      /* inode bmap btree trace */
 295 #endif
 296 #ifdef XFS_RW_TRACE
 297         struct ktrace           *i_rwtrace;     /* inode read/write trace */
 298 #endif
 299 #ifdef XFS_ILOCK_TRACE
 300         struct ktrace           *i_lock_trace;  /* inode lock/unlock trace */
 301 #endif
 302 #ifdef XFS_DIR2_TRACE
 303         struct ktrace           *i_dir_trace;   /* inode directory trace */
 304 #endif
 305 } xfs_inode_t;
 306
 307 #endif  /* __KERNEL__ */
 308
 309
 310 /*
 311  * Fork handling.
 312  */
 313 #define XFS_IFORK_PTR(ip,w)             \
 314         ((w) == XFS_DATA_FORK ? &(ip)->i_df : (ip)->i_afp)
 315 #define XFS_IFORK_Q(ip)                 XFS_CFORK_Q(&(ip)->i_d)
 316 #define XFS_IFORK_DSIZE(ip)             XFS_CFORK_DSIZE(&ip->i_d, ip->i_mount)
 317 #define XFS_IFORK_ASIZE(ip)             XFS_CFORK_ASIZE(&ip->i_d, ip->i_mount)
 318 #define XFS_IFORK_SIZE(ip,w)            XFS_CFORK_SIZE(&ip->i_d, ip->i_mount, w)
 319 #define XFS_IFORK_FORMAT(ip,w)          XFS_CFORK_FORMAT(&ip->i_d, w)
 320 #define XFS_IFORK_FMT_SET(ip,w,n)       XFS_CFORK_FMT_SET(&ip->i_d, w, n)
 321 #define XFS_IFORK_NEXTENTS(ip,w)        XFS_CFORK_NEXTENTS(&ip->i_d, w)
 322 #define XFS_IFORK_NEXT_SET(ip,w,n)      XFS_CFORK_NEXT_SET(&ip->i_d, w, n)
 323
 324
 325 #ifdef __KERNEL__
 326
 327 /*
 328  * In-core inode flags.
 329  */
 330 #define XFS_IGRIO       0x0001  /* inode used for guaranteed rate i/o */
 331 #define XFS_IUIOSZ      0x0002  /* inode i/o sizes have been explicitly set */
 332 #define XFS_IQUIESCE    0x0004  /* we have started quiescing for this inode */
 333 #define XFS_IRECLAIM    0x0008  /* we have started reclaiming this inode    */
 334 #define XFS_ISTALE      0x0010  /* inode has been staled */
 335 #define XFS_IRECLAIMABLE 0x0020 /* inode can be reclaimed */
 336 #define XFS_INEW        0x0040
 337
 338 /*
 339  * Flags for inode locking.
 340  */
 341 #define XFS_IOLOCK_EXCL         0x001
 342 #define XFS_IOLOCK_SHARED       0x002
 343 #define XFS_ILOCK_EXCL          0x004
 344 #define XFS_ILOCK_SHARED        0x008
 345 #define XFS_IUNLOCK_NONOTIFY    0x010
 346 /*      XFS_IOLOCK_NESTED       0x020 */
 347 #define XFS_EXTENT_TOKEN_RD     0x040
 348 #define XFS_SIZE_TOKEN_RD       0x080
 349 #define XFS_EXTSIZE_RD          (XFS_EXTENT_TOKEN_RD|XFS_SIZE_TOKEN_RD)
 350 #define XFS_WILLLEND            0x100   /* Always acquire tokens for lending */
 351 #define XFS_EXTENT_TOKEN_WR     (XFS_EXTENT_TOKEN_RD | XFS_WILLLEND)
 352 #define XFS_SIZE_TOKEN_WR       (XFS_SIZE_TOKEN_RD | XFS_WILLLEND)
 353 #define XFS_EXTSIZE_WR          (XFS_EXTSIZE_RD | XFS_WILLLEND)
 354 /*      XFS_SIZE_TOKEN_WANT     0x200 */
 355
 356 #define XFS_LOCK_MASK   \
 357         (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED | XFS_ILOCK_EXCL | \
 358          XFS_ILOCK_SHARED | XFS_EXTENT_TOKEN_RD | XFS_SIZE_TOKEN_RD | \
 359          XFS_WILLLEND)
 360
 361 /*
 362  * Flags for xfs_iflush()
 363  */
 364 #define XFS_IFLUSH_DELWRI_ELSE_SYNC     1
 365 #define XFS_IFLUSH_DELWRI_ELSE_ASYNC    2
 366 #define XFS_IFLUSH_SYNC                 3
 367 #define XFS_IFLUSH_ASYNC                4
 368 #define XFS_IFLUSH_DELWRI               5
 369
 370 /*
 371  * Flags for xfs_itruncate_start().
 372  */
 373 #define XFS_ITRUNC_DEFINITE     0x1
 374 #define XFS_ITRUNC_MAYBE        0x2
 375
 376 #define XFS_ITOV(ip)            BHV_TO_VNODE(XFS_ITOBHV(ip))
 377 #define XFS_ITOV_NULL(ip)       BHV_TO_VNODE_NULL(XFS_ITOBHV(ip))
 378 #define XFS_ITOBHV(ip)          ((struct bhv_desc *)(&((ip)->i_bhv_desc)))
 379 #define XFS_BHVTOI(bhvp)        ((xfs_inode_t *)((char *)(bhvp) - \
 380                                 (char *)&(((xfs_inode_t *)0)->i_bhv_desc)))
 381 #define BHV_IS_XFS(bdp)         (BHV_OPS(bdp) == &xfs_vnodeops)
 382
 383 /*
 384  * For multiple groups support: if S_ISGID bit is set in the parent
 385  * directory, group of new file is set to that of the parent, and
 386  * new subdirectory gets S_ISGID bit from parent.
 387  */
 388 #define XFS_INHERIT_GID(pip, vfsp)      \
 389         (((vfsp)->vfs_flag & VFS_GRPID) || ((pip)->i_d.di_mode & S_ISGID))
 390
 391 /*
 392  * Flags for xfs_iget()
 393  */
 394 #define XFS_IGET_CREATE         0x1
 395 #define XFS_IGET_BULKSTAT       0x2
 396
 397 /*
 398  * xfs_iget.c prototypes.
 399  */
 400 void            xfs_ihash_init(struct xfs_mount *);
 401 void            xfs_ihash_free(struct xfs_mount *);
 402 void            xfs_chash_init(struct xfs_mount *);
 403 void            xfs_chash_free(struct xfs_mount *);
 404 xfs_inode_t     *xfs_inode_incore(struct xfs_mount *, xfs_ino_t,
 405                                   struct xfs_trans *);
 406 void            xfs_inode_lock_init(xfs_inode_t *, struct bhv_vnode *);
 407 int             xfs_iget(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
 408                          uint, uint, xfs_inode_t **, xfs_daddr_t);
 409 void            xfs_iput(xfs_inode_t *, uint);
 410 void            xfs_iput_new(xfs_inode_t *, uint);
 411 void            xfs_ilock(xfs_inode_t *, uint);
 412 int             xfs_ilock_nowait(xfs_inode_t *, uint);
 413 void            xfs_iunlock(xfs_inode_t *, uint);
 414 void            xfs_ilock_demote(xfs_inode_t *, uint);
 415 void            xfs_iflock(xfs_inode_t *);
 416 int             xfs_iflock_nowait(xfs_inode_t *);
 417 uint            xfs_ilock_map_shared(xfs_inode_t *);
 418 void            xfs_iunlock_map_shared(xfs_inode_t *, uint);
 419 void            xfs_ifunlock(xfs_inode_t *);
 420 void            xfs_ireclaim(xfs_inode_t *);
 421 int             xfs_finish_reclaim(xfs_inode_t *, int, int);
 422 int             xfs_finish_reclaim_all(struct xfs_mount *, int);
 423
 424 /*
 425  * xfs_inode.c prototypes.
 426  */
 427 int             xfs_itobp(struct xfs_mount *, struct xfs_trans *,
 428                           xfs_inode_t *, xfs_dinode_t **, struct xfs_buf **,
 429                           xfs_daddr_t, uint);
 430 int             xfs_iread(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
 431                           xfs_inode_t **, xfs_daddr_t, uint);
 432 int             xfs_iread_extents(struct xfs_trans *, xfs_inode_t *, int);
 433 int             xfs_ialloc(struct xfs_trans *, xfs_inode_t *, mode_t,
 434                            xfs_nlink_t, xfs_dev_t, struct cred *, xfs_prid_t,
 435                            int, struct xfs_buf **, boolean_t *, xfs_inode_t **);
 436 void            xfs_xlate_dinode_core(xfs_caddr_t, struct xfs_dinode_core *,
 437                                         int);
 438 uint            xfs_ip2xflags(struct xfs_inode *);
 439 uint            xfs_dic2xflags(struct xfs_dinode_core *);
 440 int             xfs_ifree(struct xfs_trans *, xfs_inode_t *,
 441                            struct xfs_bmap_free *);
 442 void            xfs_itruncate_start(xfs_inode_t *, uint, xfs_fsize_t);
 443 int             xfs_itruncate_finish(struct xfs_trans **, xfs_inode_t *,
 444                                      xfs_fsize_t, int, int);
 445 int             xfs_iunlink(struct xfs_trans *, xfs_inode_t *);
 446 int             xfs_igrow_start(xfs_inode_t *, xfs_fsize_t, struct cred *);
 447 void            xfs_igrow_finish(struct xfs_trans *, xfs_inode_t *,
 448                                  xfs_fsize_t, int);
 449
 450 void            xfs_idestroy_fork(xfs_inode_t *, int);
 451 void            xfs_idestroy(xfs_inode_t *);
 452 void            xfs_idata_realloc(xfs_inode_t *, int, int);
 453 void            xfs_iextract(xfs_inode_t *);
 454 void            xfs_iext_realloc(xfs_inode_t *, int, int);
 455 void            xfs_iroot_realloc(xfs_inode_t *, int, int);
 456 void            xfs_ipin(xfs_inode_t *);
 457 void            xfs_iunpin(xfs_inode_t *);
 458 int             xfs_iextents_copy(xfs_inode_t *, xfs_bmbt_rec_t *, int);
 459 int             xfs_iflush(xfs_inode_t *, uint);
 460 void            xfs_iflush_all(struct xfs_mount *);
 461 int             xfs_iaccess(xfs_inode_t *, mode_t, cred_t *);
 462 uint            xfs_iroundup(uint);
 463 void            xfs_ichgtime(xfs_inode_t *, int);
 464 xfs_fsize_t     xfs_file_last_byte(xfs_inode_t *);
 465 void            xfs_lock_inodes(xfs_inode_t **, int, int, uint);
 466
 467 xfs_inode_t     *xfs_vtoi(struct bhv_vnode *vp);
 468
 469 void            xfs_synchronize_atime(xfs_inode_t *);
 470
 471 xfs_bmbt_rec_t  *xfs_iext_get_ext(xfs_ifork_t *, xfs_extnum_t);
 472 void            xfs_iext_insert(xfs_ifork_t *, xfs_extnum_t, xfs_extnum_t,
 473                                 xfs_bmbt_irec_t *);
 474 void            xfs_iext_add(xfs_ifork_t *, xfs_extnum_t, int);
 475 void            xfs_iext_add_indirect_multi(xfs_ifork_t *, int, xfs_extnum_t, int);
 476 void            xfs_iext_remove(xfs_ifork_t *, xfs_extnum_t, int);
 477 void            xfs_iext_remove_inline(xfs_ifork_t *, xfs_extnum_t, int);
 478 void            xfs_iext_remove_direct(xfs_ifork_t *, xfs_extnum_t, int);
 479 void            xfs_iext_remove_indirect(xfs_ifork_t *, xfs_extnum_t, int);
 480 void            xfs_iext_realloc_direct(xfs_ifork_t *, int);
 481 void            xfs_iext_realloc_indirect(xfs_ifork_t *, int);
 482 void            xfs_iext_indirect_to_direct(xfs_ifork_t *);
 483 void            xfs_iext_direct_to_inline(xfs_ifork_t *, xfs_extnum_t);
 484 void            xfs_iext_inline_to_direct(xfs_ifork_t *, int);
 485 void            xfs_iext_destroy(xfs_ifork_t *);
 486 xfs_bmbt_rec_t  *xfs_iext_bno_to_ext(xfs_ifork_t *, xfs_fileoff_t, int *);
 487 xfs_ext_irec_t  *xfs_iext_bno_to_irec(xfs_ifork_t *, xfs_fileoff_t, int *);
 488 xfs_ext_irec_t  *xfs_iext_idx_to_irec(xfs_ifork_t *, xfs_extnum_t *, int *, int);
 489 void            xfs_iext_irec_init(xfs_ifork_t *);
 490 xfs_ext_irec_t *xfs_iext_irec_new(xfs_ifork_t *, int);
 491 void            xfs_iext_irec_remove(xfs_ifork_t *, int);
 492 void            xfs_iext_irec_compact(xfs_ifork_t *);
 493 void            xfs_iext_irec_compact_pages(xfs_ifork_t *);
 494 void            xfs_iext_irec_compact_full(xfs_ifork_t *);
 495 void            xfs_iext_irec_update_extoffs(xfs_ifork_t *, int, int);
 496
 497 #define xfs_ipincount(ip)       ((unsigned int) atomic_read(&ip->i_pincount))
 498
 499 #ifdef DEBUG
 500 void            xfs_isize_check(struct xfs_mount *, xfs_inode_t *, xfs_fsize_t);
 501 #else   /* DEBUG */
 502 #define xfs_isize_check(mp, ip, isize)
 503 #endif  /* DEBUG */
 504
 505 #if defined(DEBUG)
 506 void            xfs_inobp_check(struct xfs_mount *, struct xfs_buf *);
 507 #else
 508 #define xfs_inobp_check(mp, bp)
 509 #endif /* DEBUG */
 510
 511 extern struct kmem_zone *xfs_chashlist_zone;
 512 extern struct kmem_zone *xfs_ifork_zone;
 513 extern struct kmem_zone *xfs_inode_zone;
 514 extern struct kmem_zone *xfs_ili_zone;
 515
 516 #endif  /* __KERNEL__ */
 517
 518 #endif  /* __XFS_INODE_H__ */