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 xfs_dinode;
  22 struct xfs_dinode_core;
  23
  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         xfs_bmbt_block_t        *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         xfs_extnum_t            if_lastex;      /* last if_extents used */
  71         union {
  72                 xfs_bmbt_rec_host_t *if_extents;/* linear map file exts */
  73                 xfs_ext_irec_t  *if_ext_irec;   /* irec map file exts */
  74                 char            *if_data;       /* inline file data */
  75         } if_u1;
  76         union {
  77                 xfs_bmbt_rec_host_t if_inline_ext[XFS_INLINE_EXTS];
  78                                                 /* very small file extents */
  79                 char            if_inline_data[XFS_INLINE_DATA];
  80                                                 /* very small file data */
  81                 xfs_dev_t       if_rdev;        /* dev number if special */
  82                 uuid_t          if_uuid;        /* mount point value */
  83         } if_u2;
  84 } xfs_ifork_t;
  85
  86 /*
  87  * Flags for xfs_ichgtime().
  88  */
  89 #define XFS_ICHGTIME_MOD        0x1     /* data fork modification timestamp */
  90 #define XFS_ICHGTIME_CHG        0x2     /* inode field change timestamp */
  91
  92 /*
  93  * Per-fork incore inode flags.
  94  */
  95 #define XFS_IFINLINE    0x01    /* Inline data is read in */
  96 #define XFS_IFEXTENTS   0x02    /* All extent pointers are read in */
  97 #define XFS_IFBROOT     0x04    /* i_broot points to the bmap b-tree root */
  98 #define XFS_IFEXTIREC   0x08    /* Indirection array of extent blocks */
  99
 100 /*
 101  * Flags for xfs_itobp(), xfs_imap() and xfs_dilocate().
 102  */
 103 #define XFS_IMAP_LOOKUP         0x1
 104 #define XFS_IMAP_BULKSTAT       0x2
 105
 106 #ifdef __KERNEL__
 107 struct bhv_desc;
 108 struct cred;
 109 struct ktrace;
 110 struct xfs_buf;
 111 struct xfs_bmap_free;
 112 struct xfs_bmbt_irec;
 113 struct xfs_bmbt_block;
 114 struct xfs_inode;
 115 struct xfs_inode_log_item;
 116 struct xfs_mount;
 117 struct xfs_trans;
 118 struct xfs_dquot;
 119
 120 #if defined(XFS_ILOCK_TRACE)
 121 #define XFS_ILOCK_KTRACE_SIZE   32
 122 extern ktrace_t *xfs_ilock_trace_buf;
 123 extern void xfs_ilock_trace(struct xfs_inode *, int, unsigned int, inst_t *);
 124 #else
 125 #define xfs_ilock_trace(i,n,f,ra)
 126 #endif
 127
 128 typedef struct dm_attrs_s {
 129         __uint32_t      da_dmevmask;    /* DMIG event mask */
 130         __uint16_t      da_dmstate;     /* DMIG state info */
 131         __uint16_t      da_pad;         /* DMIG extra padding */
 132 } dm_attrs_t;
 133
 134 /*
 135  * This is the xfs in-core inode structure.
 136  * Most of the on-disk inode is embedded in the i_d field.
 137  *
 138  * The extent pointers/inline file space, however, are managed
 139  * separately.  The memory for this information is pointed to by
 140  * the if_u1 unions depending on the type of the data.
 141  * This is used to linearize the array of extents for fast in-core
 142  * access.  This is used until the file's number of extents
 143  * surpasses XFS_MAX_INCORE_EXTENTS, at which point all extent pointers
 144  * are accessed through the buffer cache.
 145  *
 146  * Other state kept in the in-core inode is used for identification,
 147  * locking, transactional updating, etc of the inode.
 148  *
 149  * Generally, we do not want to hold the i_rlock while holding the
 150  * i_ilock. Hierarchy is i_iolock followed by i_rlock.
 151  *
 152  * xfs_iptr_t contains all the inode fields upto and including the
 153  * i_mnext and i_mprev fields, it is used as a marker in the inode
 154  * chain off the mount structure by xfs_sync calls.
 155  */
 156
 157 typedef struct xfs_ictimestamp {
 158         __int32_t       t_sec;          /* timestamp seconds */
 159         __int32_t       t_nsec;         /* timestamp nanoseconds */
 160 } xfs_ictimestamp_t;
 161
 162 /*
 163  * NOTE:  This structure must be kept identical to struct xfs_dinode_core
 164  *        in xfs_dinode.h except for the endianess annotations.
 165  */
 166 typedef struct xfs_icdinode {
 167         __uint16_t      di_magic;       /* inode magic # = XFS_DINODE_MAGIC */
 168         __uint16_t      di_mode;        /* mode and type of file */
 169         __int8_t        di_version;     /* inode version */
 170         __int8_t        di_format;      /* format of di_c data */
 171         __uint16_t      di_onlink;      /* old number of links to file */
 172         __uint32_t      di_uid;         /* owner's user id */
 173         __uint32_t      di_gid;         /* owner's group id */
 174         __uint32_t      di_nlink;       /* number of links to file */
 175         __uint16_t      di_projid;      /* owner's project id */
 176         __uint8_t       di_pad[8];      /* unused, zeroed space */
 177         __uint16_t      di_flushiter;   /* incremented on flush */
 178         xfs_ictimestamp_t di_atime;     /* time last accessed */
 179         xfs_ictimestamp_t di_mtime;     /* time last modified */
 180         xfs_ictimestamp_t di_ctime;     /* time created/inode modified */
 181         xfs_fsize_t     di_size;        /* number of bytes in file */
 182         xfs_drfsbno_t   di_nblocks;     /* # of direct & btree blocks used */
 183         xfs_extlen_t    di_extsize;     /* basic/minimum extent size for file */
 184         xfs_extnum_t    di_nextents;    /* number of extents in data fork */
 185         xfs_aextnum_t   di_anextents;   /* number of extents in attribute fork*/
 186         __uint8_t       di_forkoff;     /* attr fork offs, <<3 for 64b align */
 187         __int8_t        di_aformat;     /* format of attr fork's data */
 188         __uint32_t      di_dmevmask;    /* DMIG event mask */
 189         __uint16_t      di_dmstate;     /* DMIG state info */
 190         __uint16_t      di_flags;       /* random flags, XFS_DIFLAG_... */
 191         __uint32_t      di_gen;         /* generation number */
 192 } xfs_icdinode_t;
 193
 194 typedef struct {
 195         struct xfs_inode        *ip_mnext;      /* next inode in mount list */
 196         struct xfs_inode        *ip_mprev;      /* ptr to prev inode */
 197         struct xfs_mount        *ip_mount;      /* fs mount struct ptr */
 198 } xfs_iptr_t;
 199
 200 typedef struct xfs_inode {
 201         /* Inode linking and identification information. */
 202         struct xfs_inode        *i_mnext;       /* next inode in mount list */
 203         struct xfs_inode        *i_mprev;       /* ptr to prev inode */
 204         struct xfs_mount        *i_mount;       /* fs mount struct ptr */
 205         struct list_head        i_reclaim;      /* reclaim list */
 206         struct inode            *i_vnode;       /* vnode backpointer */
 207         struct xfs_dquot        *i_udquot;      /* user dquot */
 208         struct xfs_dquot        *i_gdquot;      /* group dquot */
 209
 210         /* Inode location stuff */
 211         xfs_ino_t               i_ino;          /* inode number (agno/agino)*/
 212         xfs_daddr_t             i_blkno;        /* blkno of inode buffer */
 213         ushort                  i_len;          /* len of inode buffer */
 214         ushort                  i_boffset;      /* off of inode in buffer */
 215
 216         /* Extent information. */
 217         xfs_ifork_t             *i_afp;         /* attribute fork pointer */
 218         xfs_ifork_t             i_df;           /* data fork */
 219
 220         /* Transaction and locking information. */
 221         struct xfs_trans        *i_transp;      /* ptr to owning transaction*/
 222         struct xfs_inode_log_item *i_itemp;     /* logging information */
 223         mrlock_t                i_lock;         /* inode lock */
 224         mrlock_t                i_iolock;       /* inode IO lock */
 225         struct completion       i_flush;        /* inode flush completion q */
 226         atomic_t                i_pincount;     /* inode pin count */
 227         wait_queue_head_t       i_ipin_wait;    /* inode pinning wait queue */
 228         spinlock_t              i_flags_lock;   /* inode i_flags lock */
 229         /* Miscellaneous state. */
 230         unsigned short          i_flags;        /* see defined flags below */
 231         unsigned char           i_update_core;  /* timestamps/size is dirty */
 232         unsigned char           i_update_size;  /* di_size field is dirty */
 233         unsigned int            i_gen;          /* generation count */
 234         unsigned int            i_delayed_blks; /* count of delay alloc blks */
 235
 236         xfs_icdinode_t          i_d;            /* most of ondisk inode */
 237
 238         xfs_fsize_t             i_size;         /* in-memory size */
 239         xfs_fsize_t             i_new_size;     /* size when write completes */
 240         atomic_t                i_iocount;      /* outstanding I/O count */
 241         /* Trace buffers per inode. */
 242 #ifdef XFS_INODE_TRACE
 243         struct ktrace           *i_trace;       /* general inode trace */
 244 #endif
 245 #ifdef XFS_BMAP_TRACE
 246         struct ktrace           *i_xtrace;      /* inode extent list trace */
 247 #endif
 248 #ifdef XFS_BMBT_TRACE
 249         struct ktrace           *i_btrace;      /* inode bmap btree trace */
 250 #endif
 251 #ifdef XFS_RW_TRACE
 252         struct ktrace           *i_rwtrace;     /* inode read/write trace */
 253 #endif
 254 #ifdef XFS_ILOCK_TRACE
 255         struct ktrace           *i_lock_trace;  /* inode lock/unlock trace */
 256 #endif
 257 #ifdef XFS_DIR2_TRACE
 258         struct ktrace           *i_dir_trace;   /* inode directory trace */
 259 #endif
 260 } xfs_inode_t;
 261
 262 #define XFS_ISIZE(ip)   (((ip)->i_d.di_mode & S_IFMT) == S_IFREG) ? \
 263                                 (ip)->i_size : (ip)->i_d.di_size;
 264
 265 /* Convert from vfs inode to xfs inode */
 266 static inline struct xfs_inode *XFS_I(struct inode *inode)
 267 {
 268         return (struct xfs_inode *)inode->i_private;
 269 }
 270
 271 /* convert from xfs inode to vfs inode */
 272 static inline struct inode *VFS_I(struct xfs_inode *ip)
 273 {
 274         return (struct inode *)ip->i_vnode;
 275 }
 276
 277 /*
 278  * i_flags helper functions
 279  */
 280 static inline void
 281 __xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
 282 {
 283         ip->i_flags |= flags;
 284 }
 285
 286 static inline void
 287 xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
 288 {
 289         spin_lock(&ip->i_flags_lock);
 290         __xfs_iflags_set(ip, flags);
 291         spin_unlock(&ip->i_flags_lock);
 292 }
 293
 294 static inline void
 295 xfs_iflags_clear(xfs_inode_t *ip, unsigned short flags)
 296 {
 297         spin_lock(&ip->i_flags_lock);
 298         ip->i_flags &= ~flags;
 299         spin_unlock(&ip->i_flags_lock);
 300 }
 301
 302 static inline int
 303 __xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
 304 {
 305         return (ip->i_flags & flags);
 306 }
 307
 308 static inline int
 309 xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
 310 {
 311         int ret;
 312         spin_lock(&ip->i_flags_lock);
 313         ret = __xfs_iflags_test(ip, flags);
 314         spin_unlock(&ip->i_flags_lock);
 315         return ret;
 316 }
 317
 318 static inline int
 319 xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned short flags)
 320 {
 321         int ret;
 322
 323         spin_lock(&ip->i_flags_lock);
 324         ret = ip->i_flags & flags;
 325         if (ret)
 326                 ip->i_flags &= ~flags;
 327         spin_unlock(&ip->i_flags_lock);
 328         return ret;
 329 }
 330 #endif  /* __KERNEL__ */
 331
 332
 333 /*
 334  * Fork handling.
 335  */
 336
 337 #define XFS_IFORK_Q(ip)                 ((ip)->i_d.di_forkoff != 0)
 338 #define XFS_IFORK_BOFF(ip)              ((int)((ip)->i_d.di_forkoff << 3))
 339
 340 #define XFS_IFORK_PTR(ip,w)             \
 341         ((w) == XFS_DATA_FORK ? \
 342                 &(ip)->i_df : \
 343                 (ip)->i_afp)
 344 #define XFS_IFORK_DSIZE(ip) \
 345         (XFS_IFORK_Q(ip) ? \
 346                 XFS_IFORK_BOFF(ip) : \
 347                 XFS_LITINO((ip)->i_mount))
 348 #define XFS_IFORK_ASIZE(ip) \
 349         (XFS_IFORK_Q(ip) ? \
 350                 XFS_LITINO((ip)->i_mount) - XFS_IFORK_BOFF(ip) : \
 351                 0)
 352 #define XFS_IFORK_SIZE(ip,w) \
 353         ((w) == XFS_DATA_FORK ? \
 354                 XFS_IFORK_DSIZE(ip) : \
 355                 XFS_IFORK_ASIZE(ip))
 356 #define XFS_IFORK_FORMAT(ip,w) \
 357         ((w) == XFS_DATA_FORK ? \
 358                 (ip)->i_d.di_format : \
 359                 (ip)->i_d.di_aformat)
 360 #define XFS_IFORK_FMT_SET(ip,w,n) \
 361         ((w) == XFS_DATA_FORK ? \
 362                 ((ip)->i_d.di_format = (n)) : \
 363                 ((ip)->i_d.di_aformat = (n)))
 364 #define XFS_IFORK_NEXTENTS(ip,w) \
 365         ((w) == XFS_DATA_FORK ? \
 366                 (ip)->i_d.di_nextents : \
 367                 (ip)->i_d.di_anextents)
 368 #define XFS_IFORK_NEXT_SET(ip,w,n) \
 369         ((w) == XFS_DATA_FORK ? \
 370                 ((ip)->i_d.di_nextents = (n)) : \
 371                 ((ip)->i_d.di_anextents = (n)))
 372
 373 #ifdef __KERNEL__
 374
 375 /*
 376  * In-core inode flags.
 377  */
 378 #define XFS_IGRIO       0x0001  /* inode used for guaranteed rate i/o */
 379 #define XFS_IUIOSZ      0x0002  /* inode i/o sizes have been explicitly set */
 380 #define XFS_IQUIESCE    0x0004  /* we have started quiescing for this inode */
 381 #define XFS_IRECLAIM    0x0008  /* we have started reclaiming this inode    */
 382 #define XFS_ISTALE      0x0010  /* inode has been staled */
 383 #define XFS_IRECLAIMABLE 0x0020 /* inode can be reclaimed */
 384 #define XFS_INEW        0x0040
 385 #define XFS_IFILESTREAM 0x0080  /* inode is in a filestream directory */
 386 #define XFS_IMODIFIED   0x0100  /* XFS inode state possibly differs */
 387                                 /* to the Linux inode state. */
 388 #define XFS_ITRUNCATED  0x0200  /* truncated down so flush-on-close */
 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 #define XFS_IUNLOCK_NONOTIFY    (1<<4)
 400
 401 #define XFS_LOCK_MASK           (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \
 402                                 | XFS_ILOCK_EXCL | XFS_ILOCK_SHARED)
 403
 404 /*
 405  * Flags for lockdep annotations.
 406  *
 407  * XFS_I[O]LOCK_PARENT - for operations that require locking two inodes
 408  * (ie directory operations that require locking a directory inode and
 409  * an entry inode).  The first inode gets locked with this flag so it
 410  * gets a lockdep subclass of 1 and the second lock will have a lockdep
 411  * subclass of 0.
 412  *
 413  * XFS_LOCK_INUMORDER - for locking several inodes at the some time
 414  * with xfs_lock_inodes().  This flag is used as the starting subclass
 415  * and each subsequent lock acquired will increment the subclass by one.
 416  * So the first lock acquired will have a lockdep subclass of 2, the
 417  * second lock will have a lockdep subclass of 3, and so on. It is
 418  * the responsibility of the class builder to shift this to the correct
 419  * portion of the lock_mode lockdep mask.
 420  */
 421 #define XFS_LOCK_PARENT         1
 422 #define XFS_LOCK_INUMORDER      2
 423
 424 #define XFS_IOLOCK_SHIFT        16
 425 #define XFS_IOLOCK_PARENT       (XFS_LOCK_PARENT << XFS_IOLOCK_SHIFT)
 426
 427 #define XFS_ILOCK_SHIFT         24
 428 #define XFS_ILOCK_PARENT        (XFS_LOCK_PARENT << XFS_ILOCK_SHIFT)
 429
 430 #define XFS_IOLOCK_DEP_MASK     0x00ff0000
 431 #define XFS_ILOCK_DEP_MASK      0xff000000
 432 #define XFS_LOCK_DEP_MASK       (XFS_IOLOCK_DEP_MASK | XFS_ILOCK_DEP_MASK)
 433
 434 #define XFS_IOLOCK_DEP(flags)   (((flags) & XFS_IOLOCK_DEP_MASK) >> XFS_IOLOCK_SHIFT)
 435 #define XFS_ILOCK_DEP(flags)    (((flags) & XFS_ILOCK_DEP_MASK) >> XFS_ILOCK_SHIFT)
 436
 437 /*
 438  * Flags for xfs_iflush()
 439  */
 440 #define XFS_IFLUSH_DELWRI_ELSE_SYNC     1
 441 #define XFS_IFLUSH_DELWRI_ELSE_ASYNC    2
 442 #define XFS_IFLUSH_SYNC                 3
 443 #define XFS_IFLUSH_ASYNC                4
 444 #define XFS_IFLUSH_DELWRI               5
 445 #define XFS_IFLUSH_ASYNC_NOBLOCK        6
 446
 447 /*
 448  * Flags for xfs_itruncate_start().
 449  */
 450 #define XFS_ITRUNC_DEFINITE     0x1
 451 #define XFS_ITRUNC_MAYBE        0x2
 452
 453 /*
 454  * For multiple groups support: if S_ISGID bit is set in the parent
 455  * directory, group of new file is set to that of the parent, and
 456  * new subdirectory gets S_ISGID bit from parent.
 457  */
 458 #define XFS_INHERIT_GID(pip)    \
 459         (((pip)->i_mount->m_flags & XFS_MOUNT_GRPID) || \
 460          ((pip)->i_d.di_mode & S_ISGID))
 461
 462 /*
 463  * Flags for xfs_iget()
 464  */
 465 #define XFS_IGET_CREATE         0x1
 466 #define XFS_IGET_BULKSTAT       0x2
 467
 468 /*
 469  * xfs_iget.c prototypes.
 470  */
 471 void            xfs_ihash_init(struct xfs_mount *);
 472 void            xfs_ihash_free(struct xfs_mount *);
 473 xfs_inode_t     *xfs_inode_incore(struct xfs_mount *, xfs_ino_t,
 474                                   struct xfs_trans *);
 475 int             xfs_iget(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
 476                          uint, uint, xfs_inode_t **, xfs_daddr_t);
 477 void            xfs_iput(xfs_inode_t *, uint);
 478 void            xfs_iput_new(xfs_inode_t *, uint);
 479 void            xfs_ilock(xfs_inode_t *, uint);
 480 int             xfs_ilock_nowait(xfs_inode_t *, uint);
 481 void            xfs_iunlock(xfs_inode_t *, uint);
 482 void            xfs_ilock_demote(xfs_inode_t *, uint);
 483 int             xfs_isilocked(xfs_inode_t *, uint);
 484 uint            xfs_ilock_map_shared(xfs_inode_t *);
 485 void            xfs_iunlock_map_shared(xfs_inode_t *, uint);
 486 void            xfs_ireclaim(xfs_inode_t *);
 487 int             xfs_finish_reclaim(xfs_inode_t *, int, int);
 488 int             xfs_finish_reclaim_all(struct xfs_mount *, int);
 489
 490 /*
 491  * xfs_inode.c prototypes.
 492  */
 493 int             xfs_itobp(struct xfs_mount *, struct xfs_trans *,
 494                           xfs_inode_t *, struct xfs_dinode **, struct xfs_buf **,
 495                           xfs_daddr_t, uint, uint);
 496 int             xfs_iread(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
 497                           xfs_inode_t **, xfs_daddr_t, uint);
 498 int             xfs_iread_extents(struct xfs_trans *, xfs_inode_t *, int);
 499 int             xfs_ialloc(struct xfs_trans *, xfs_inode_t *, mode_t,
 500                            xfs_nlink_t, xfs_dev_t, struct cred *, xfs_prid_t,
 501                            int, struct xfs_buf **, boolean_t *, xfs_inode_t **);
 502 void            xfs_dinode_from_disk(struct xfs_icdinode *,
 503                                      struct xfs_dinode_core *);
 504 void            xfs_dinode_to_disk(struct xfs_dinode_core *,
 505                                    struct xfs_icdinode *);
 506
 507 uint            xfs_ip2xflags(struct xfs_inode *);
 508 uint            xfs_dic2xflags(struct xfs_dinode *);
 509 int             xfs_ifree(struct xfs_trans *, xfs_inode_t *,
 510                            struct xfs_bmap_free *);
 511 int             xfs_itruncate_start(xfs_inode_t *, uint, xfs_fsize_t);
 512 int             xfs_itruncate_finish(struct xfs_trans **, xfs_inode_t *,
 513                                      xfs_fsize_t, int, int);
 514 int             xfs_iunlink(struct xfs_trans *, xfs_inode_t *);
 515
 516 void            xfs_idestroy_fork(xfs_inode_t *, int);
 517 void            xfs_idestroy(xfs_inode_t *);
 518 void            xfs_idata_realloc(xfs_inode_t *, int, int);
 519 void            xfs_iextract(xfs_inode_t *);
 520 void            xfs_iext_realloc(xfs_inode_t *, int, int);
 521 void            xfs_iroot_realloc(xfs_inode_t *, int, int);
 522 void            xfs_ipin(xfs_inode_t *);
 523 void            xfs_iunpin(xfs_inode_t *);
 524 int             xfs_iextents_copy(xfs_inode_t *, xfs_bmbt_rec_t *, int);
 525 int             xfs_iflush(xfs_inode_t *, uint);
 526 void            xfs_iflush_all(struct xfs_mount *);
 527 void            xfs_ichgtime(xfs_inode_t *, int);
 528 xfs_fsize_t     xfs_file_last_byte(xfs_inode_t *);
 529 void            xfs_lock_inodes(xfs_inode_t **, int, uint);
 530 void            xfs_lock_two_inodes(xfs_inode_t *, xfs_inode_t *, uint);
 531
 532 void            xfs_synchronize_atime(xfs_inode_t *);
 533 void            xfs_mark_inode_dirty_sync(xfs_inode_t *);
 534
 535 xfs_bmbt_rec_host_t *xfs_iext_get_ext(xfs_ifork_t *, xfs_extnum_t);
 536 void            xfs_iext_insert(xfs_ifork_t *, xfs_extnum_t, xfs_extnum_t,
 537                                 xfs_bmbt_irec_t *);
 538 void            xfs_iext_add(xfs_ifork_t *, xfs_extnum_t, int);
 539 void            xfs_iext_add_indirect_multi(xfs_ifork_t *, int, xfs_extnum_t, int);
 540 void            xfs_iext_remove(xfs_ifork_t *, xfs_extnum_t, int);
 541 void            xfs_iext_remove_inline(xfs_ifork_t *, xfs_extnum_t, int);
 542 void            xfs_iext_remove_direct(xfs_ifork_t *, xfs_extnum_t, int);
 543 void            xfs_iext_remove_indirect(xfs_ifork_t *, xfs_extnum_t, int);
 544 void            xfs_iext_realloc_direct(xfs_ifork_t *, int);
 545 void            xfs_iext_realloc_indirect(xfs_ifork_t *, int);
 546 void            xfs_iext_indirect_to_direct(xfs_ifork_t *);
 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 #ifdef DEBUG
 564 void            xfs_isize_check(struct xfs_mount *, xfs_inode_t *, xfs_fsize_t);
 565 #else   /* DEBUG */
 566 #define xfs_isize_check(mp, ip, isize)
 567 #endif  /* DEBUG */
 568
 569 #if defined(DEBUG)
 570 void            xfs_inobp_check(struct xfs_mount *, struct xfs_buf *);
 571 #else
 572 #define xfs_inobp_check(mp, bp)
 573 #endif /* DEBUG */
 574
 575 extern struct kmem_zone *xfs_ifork_zone;
 576 extern struct kmem_zone *xfs_inode_zone;
 577 extern struct kmem_zone *xfs_ili_zone;
 578
 579 /*
 580  * Manage the i_flush queue embedded in the inode.  This completion
 581  * queue synchronizes processes attempting to flush the in-core
 582  * inode back to disk.
 583  */
 584 static inline void xfs_iflock(xfs_inode_t *ip)
 585 {
 586         wait_for_completion(&ip->i_flush);
 587 }
 588
 589 static inline int xfs_iflock_nowait(xfs_inode_t *ip)
 590 {
 591         return try_wait_for_completion(&ip->i_flush);
 592 }
 593
 594 static inline void xfs_ifunlock(xfs_inode_t *ip)
 595 {
 596         complete(&ip->i_flush);
 597 }
 598
 599 #endif  /* __KERNEL__ */
 600
 601 #endif  /* __XFS_INODE_H__ */