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_ACC        0x2     /* data fork access timestamp */
  91 #define XFS_ICHGTIME_CHG        0x4     /* inode field change timestamp */
  92
  93 /*
  94  * Per-fork incore inode flags.
  95  */
  96 #define XFS_IFINLINE    0x01    /* Inline data is read in */
  97 #define XFS_IFEXTENTS   0x02    /* All extent pointers are read in */
  98 #define XFS_IFBROOT     0x04    /* i_broot points to the bmap b-tree root */
  99 #define XFS_IFEXTIREC   0x08    /* Indirection array of extent blocks */
 100
 101 /*
 102  * Flags for xfs_itobp(), xfs_imap() and xfs_dilocate().
 103  */
 104 #define XFS_IMAP_LOOKUP         0x1
 105 #define XFS_IMAP_BULKSTAT       0x2
 106
 107 #ifdef __KERNEL__
 108 struct bhv_desc;
 109 struct cred;
 110 struct ktrace;
 111 struct xfs_buf;
 112 struct xfs_bmap_free;
 113 struct xfs_bmbt_irec;
 114 struct xfs_bmbt_block;
 115 struct xfs_inode;
 116 struct xfs_inode_log_item;
 117 struct xfs_mount;
 118 struct xfs_trans;
 119 struct xfs_dquot;
 120
 121 #if defined(XFS_ILOCK_TRACE)
 122 #define XFS_ILOCK_KTRACE_SIZE   32
 123 extern ktrace_t *xfs_ilock_trace_buf;
 124 extern void xfs_ilock_trace(struct xfs_inode *, int, unsigned int, inst_t *);
 125 #else
 126 #define xfs_ilock_trace(i,n,f,ra)
 127 #endif
 128
 129 typedef struct dm_attrs_s {
 130         __uint32_t      da_dmevmask;    /* DMIG event mask */
 131         __uint16_t      da_dmstate;     /* DMIG state info */
 132         __uint16_t      da_pad;         /* DMIG extra padding */
 133 } dm_attrs_t;
 134
 135 /*
 136  * This is the xfs in-core inode structure.
 137  * Most of the on-disk inode is embedded in the i_d field.
 138  *
 139  * The extent pointers/inline file space, however, are managed
 140  * separately.  The memory for this information is pointed to by
 141  * the if_u1 unions depending on the type of the data.
 142  * This is used to linearize the array of extents for fast in-core
 143  * access.  This is used until the file's number of extents
 144  * surpasses XFS_MAX_INCORE_EXTENTS, at which point all extent pointers
 145  * are accessed through the buffer cache.
 146  *
 147  * Other state kept in the in-core inode is used for identification,
 148  * locking, transactional updating, etc of the inode.
 149  *
 150  * Generally, we do not want to hold the i_rlock while holding the
 151  * i_ilock. Hierarchy is i_iolock followed by i_rlock.
 152  *
 153  * xfs_iptr_t contains all the inode fields upto and including the
 154  * i_mnext and i_mprev fields, it is used as a marker in the inode
 155  * chain off the mount structure by xfs_sync calls.
 156  */
 157
 158 typedef struct xfs_ictimestamp {
 159         __int32_t       t_sec;          /* timestamp seconds */
 160         __int32_t       t_nsec;         /* timestamp nanoseconds */
 161 } xfs_ictimestamp_t;
 162
 163 /*
 164  * NOTE:  This structure must be kept identical to struct xfs_dinode_core
 165  *        in xfs_dinode.h except for the endianess annotations.
 166  */
 167 typedef struct xfs_icdinode {
 168         __uint16_t      di_magic;       /* inode magic # = XFS_DINODE_MAGIC */
 169         __uint16_t      di_mode;        /* mode and type of file */
 170         __int8_t        di_version;     /* inode version */
 171         __int8_t        di_format;      /* format of di_c data */
 172         __uint16_t      di_onlink;      /* old number of links to file */
 173         __uint32_t      di_uid;         /* owner's user id */
 174         __uint32_t      di_gid;         /* owner's group id */
 175         __uint32_t      di_nlink;       /* number of links to file */
 176         __uint16_t      di_projid;      /* owner's project id */
 177         __uint8_t       di_pad[8];      /* unused, zeroed space */
 178         __uint16_t      di_flushiter;   /* incremented on flush */
 179         xfs_ictimestamp_t di_atime;     /* time last accessed */
 180         xfs_ictimestamp_t di_mtime;     /* time last modified */
 181         xfs_ictimestamp_t di_ctime;     /* time created/inode modified */
 182         xfs_fsize_t     di_size;        /* number of bytes in file */
 183         xfs_drfsbno_t   di_nblocks;     /* # of direct & btree blocks used */
 184         xfs_extlen_t    di_extsize;     /* basic/minimum extent size for file */
 185         xfs_extnum_t    di_nextents;    /* number of extents in data fork */
 186         xfs_aextnum_t   di_anextents;   /* number of extents in attribute fork*/
 187         __uint8_t       di_forkoff;     /* attr fork offs, <<3 for 64b align */
 188         __int8_t        di_aformat;     /* format of attr fork's data */
 189         __uint32_t      di_dmevmask;    /* DMIG event mask */
 190         __uint16_t      di_dmstate;     /* DMIG state info */
 191         __uint16_t      di_flags;       /* random flags, XFS_DIFLAG_... */
 192         __uint32_t      di_gen;         /* generation number */
 193 } xfs_icdinode_t;
 194
 195 typedef struct {
 196         struct xfs_inode        *ip_mnext;      /* next inode in mount list */
 197         struct xfs_inode        *ip_mprev;      /* ptr to prev inode */
 198         struct xfs_mount        *ip_mount;      /* fs mount struct ptr */
 199 } xfs_iptr_t;
 200
 201 typedef struct xfs_inode {
 202         /* Inode linking and identification information. */
 203         struct xfs_inode        *i_mnext;       /* next inode in mount list */
 204         struct xfs_inode        *i_mprev;       /* ptr to prev inode */
 205         struct xfs_mount        *i_mount;       /* fs mount struct ptr */
 206         struct list_head        i_reclaim;      /* reclaim list */
 207         struct inode            *i_vnode;       /* vnode backpointer */
 208         struct xfs_dquot        *i_udquot;      /* user dquot */
 209         struct xfs_dquot        *i_gdquot;      /* group dquot */
 210
 211         /* Inode location stuff */
 212         xfs_ino_t               i_ino;          /* inode number (agno/agino)*/
 213         xfs_daddr_t             i_blkno;        /* blkno of inode buffer */
 214         ushort                  i_len;          /* len of inode buffer */
 215         ushort                  i_boffset;      /* off of inode in buffer */
 216
 217         /* Extent information. */
 218         xfs_ifork_t             *i_afp;         /* attribute fork pointer */
 219         xfs_ifork_t             i_df;           /* data fork */
 220
 221         /* Transaction and locking information. */
 222         struct xfs_trans        *i_transp;      /* ptr to owning transaction*/
 223         struct xfs_inode_log_item *i_itemp;     /* logging information */
 224         mrlock_t                i_lock;         /* inode lock */
 225         mrlock_t                i_iolock;       /* inode IO lock */
 226         struct completion       i_flush;        /* inode flush completion q */
 227         atomic_t                i_pincount;     /* inode pin count */
 228         wait_queue_head_t       i_ipin_wait;    /* inode pinning wait queue */
 229         spinlock_t              i_flags_lock;   /* inode i_flags lock */
 230         /* Miscellaneous state. */
 231         unsigned short          i_flags;        /* see defined flags below */
 232         unsigned char           i_update_core;  /* timestamps/size is dirty */
 233         unsigned char           i_update_size;  /* di_size field is dirty */
 234         unsigned int            i_gen;          /* generation count */
 235         unsigned int            i_delayed_blks; /* count of delay alloc blks */
 236
 237         xfs_icdinode_t          i_d;            /* most of ondisk inode */
 238
 239         xfs_fsize_t             i_size;         /* in-memory size */
 240         xfs_fsize_t             i_new_size;     /* size when write completes */
 241         atomic_t                i_iocount;      /* outstanding I/O count */
 242         /* Trace buffers per inode. */
 243 #ifdef XFS_INODE_TRACE
 244         struct ktrace           *i_trace;       /* general inode trace */
 245 #endif
 246 #ifdef XFS_BMAP_TRACE
 247         struct ktrace           *i_xtrace;      /* inode extent list trace */
 248 #endif
 249 #ifdef XFS_BMBT_TRACE
 250         struct ktrace           *i_btrace;      /* inode bmap btree trace */
 251 #endif
 252 #ifdef XFS_RW_TRACE
 253         struct ktrace           *i_rwtrace;     /* inode read/write trace */
 254 #endif
 255 #ifdef XFS_ILOCK_TRACE
 256         struct ktrace           *i_lock_trace;  /* inode lock/unlock trace */
 257 #endif
 258 #ifdef XFS_DIR2_TRACE
 259         struct ktrace           *i_dir_trace;   /* inode directory trace */
 260 #endif
 261 } xfs_inode_t;
 262
 263 #define XFS_ISIZE(ip)   (((ip)->i_d.di_mode & S_IFMT) == S_IFREG) ? \
 264                                 (ip)->i_size : (ip)->i_d.di_size;
 265
 266 /* Convert from vfs inode to xfs inode */
 267 static inline struct xfs_inode *XFS_I(struct inode *inode)
 268 {
 269         return (struct xfs_inode *)inode->i_private;
 270 }
 271
 272 /* convert from xfs inode to vfs inode */
 273 static inline struct inode *VFS_I(struct xfs_inode *ip)
 274 {
 275         return (struct inode *)ip->i_vnode;
 276 }
 277
 278 /*
 279  * i_flags helper functions
 280  */
 281 static inline void
 282 __xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
 283 {
 284         ip->i_flags |= flags;
 285 }
 286
 287 static inline void
 288 xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
 289 {
 290         spin_lock(&ip->i_flags_lock);
 291         __xfs_iflags_set(ip, flags);
 292         spin_unlock(&ip->i_flags_lock);
 293 }
 294
 295 static inline void
 296 xfs_iflags_clear(xfs_inode_t *ip, unsigned short flags)
 297 {
 298         spin_lock(&ip->i_flags_lock);
 299         ip->i_flags &= ~flags;
 300         spin_unlock(&ip->i_flags_lock);
 301 }
 302
 303 static inline int
 304 __xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
 305 {
 306         return (ip->i_flags & flags);
 307 }
 308
 309 static inline int
 310 xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
 311 {
 312         int ret;
 313         spin_lock(&ip->i_flags_lock);
 314         ret = __xfs_iflags_test(ip, flags);
 315         spin_unlock(&ip->i_flags_lock);
 316         return ret;
 317 }
 318
 319 static inline int
 320 xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned short flags)
 321 {
 322         int ret;
 323
 324         spin_lock(&ip->i_flags_lock);
 325         ret = ip->i_flags & flags;
 326         if (ret)
 327                 ip->i_flags &= ~flags;
 328         spin_unlock(&ip->i_flags_lock);
 329         return ret;
 330 }
 331 #endif  /* __KERNEL__ */
 332
 333
 334 /*
 335  * Fork handling.
 336  */
 337
 338 #define XFS_IFORK_Q(ip)                 ((ip)->i_d.di_forkoff != 0)
 339 #define XFS_IFORK_BOFF(ip)              ((int)((ip)->i_d.di_forkoff << 3))
 340
 341 #define XFS_IFORK_PTR(ip,w)             \
 342         ((w) == XFS_DATA_FORK ? \
 343                 &(ip)->i_df : \
 344                 (ip)->i_afp)
 345 #define XFS_IFORK_DSIZE(ip) \
 346         (XFS_IFORK_Q(ip) ? \
 347                 XFS_IFORK_BOFF(ip) : \
 348                 XFS_LITINO((ip)->i_mount))
 349 #define XFS_IFORK_ASIZE(ip) \
 350         (XFS_IFORK_Q(ip) ? \
 351                 XFS_LITINO((ip)->i_mount) - XFS_IFORK_BOFF(ip) : \
 352                 0)
 353 #define XFS_IFORK_SIZE(ip,w) \
 354         ((w) == XFS_DATA_FORK ? \
 355                 XFS_IFORK_DSIZE(ip) : \
 356                 XFS_IFORK_ASIZE(ip))
 357 #define XFS_IFORK_FORMAT(ip,w) \
 358         ((w) == XFS_DATA_FORK ? \
 359                 (ip)->i_d.di_format : \
 360                 (ip)->i_d.di_aformat)
 361 #define XFS_IFORK_FMT_SET(ip,w,n) \
 362         ((w) == XFS_DATA_FORK ? \
 363                 ((ip)->i_d.di_format = (n)) : \
 364                 ((ip)->i_d.di_aformat = (n)))
 365 #define XFS_IFORK_NEXTENTS(ip,w) \
 366         ((w) == XFS_DATA_FORK ? \
 367                 (ip)->i_d.di_nextents : \
 368                 (ip)->i_d.di_anextents)
 369 #define XFS_IFORK_NEXT_SET(ip,w,n) \
 370         ((w) == XFS_DATA_FORK ? \
 371                 ((ip)->i_d.di_nextents = (n)) : \
 372                 ((ip)->i_d.di_anextents = (n)))
 373
 374 #ifdef __KERNEL__
 375
 376 /*
 377  * In-core inode flags.
 378  */
 379 #define XFS_IGRIO       0x0001  /* inode used for guaranteed rate i/o */
 380 #define XFS_IUIOSZ      0x0002  /* inode i/o sizes have been explicitly set */
 381 #define XFS_IQUIESCE    0x0004  /* we have started quiescing for this inode */
 382 #define XFS_IRECLAIM    0x0008  /* we have started reclaiming this inode    */
 383 #define XFS_ISTALE      0x0010  /* inode has been staled */
 384 #define XFS_IRECLAIMABLE 0x0020 /* inode can be reclaimed */
 385 #define XFS_INEW        0x0040
 386 #define XFS_IFILESTREAM 0x0080  /* inode is in a filestream directory */
 387 #define XFS_IMODIFIED   0x0100  /* XFS inode state possibly differs */
 388                                 /* to the Linux inode state. */
 389 #define XFS_ITRUNCATED  0x0200  /* truncated down so flush-on-close */
 390
 391 /*
 392  * Flags for inode locking.
 393  * Bit ranges:  1<<1  - 1<<16-1 -- iolock/ilock modes (bitfield)
 394  *              1<<16 - 1<<32-1 -- lockdep annotation (integers)
 395  */
 396 #define XFS_IOLOCK_EXCL         (1<<0)
 397 #define XFS_IOLOCK_SHARED       (1<<1)
 398 #define XFS_ILOCK_EXCL          (1<<2)
 399 #define XFS_ILOCK_SHARED        (1<<3)
 400 #define XFS_IUNLOCK_NONOTIFY    (1<<4)
 401
 402 #define XFS_LOCK_MASK           (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \
 403                                 | XFS_ILOCK_EXCL | XFS_ILOCK_SHARED)
 404
 405 /*
 406  * Flags for lockdep annotations.
 407  *
 408  * XFS_I[O]LOCK_PARENT - for operations that require locking two inodes
 409  * (ie directory operations that require locking a directory inode and
 410  * an entry inode).  The first inode gets locked with this flag so it
 411  * gets a lockdep subclass of 1 and the second lock will have a lockdep
 412  * subclass of 0.
 413  *
 414  * XFS_LOCK_INUMORDER - for locking several inodes at the some time
 415  * with xfs_lock_inodes().  This flag is used as the starting subclass
 416  * and each subsequent lock acquired will increment the subclass by one.
 417  * So the first lock acquired will have a lockdep subclass of 2, the
 418  * second lock will have a lockdep subclass of 3, and so on. It is
 419  * the responsibility of the class builder to shift this to the correct
 420  * portion of the lock_mode lockdep mask.
 421  */
 422 #define XFS_LOCK_PARENT         1
 423 #define XFS_LOCK_INUMORDER      2
 424
 425 #define XFS_IOLOCK_SHIFT        16
 426 #define XFS_IOLOCK_PARENT       (XFS_LOCK_PARENT << XFS_IOLOCK_SHIFT)
 427
 428 #define XFS_ILOCK_SHIFT         24
 429 #define XFS_ILOCK_PARENT        (XFS_LOCK_PARENT << XFS_ILOCK_SHIFT)
 430
 431 #define XFS_IOLOCK_DEP_MASK     0x00ff0000
 432 #define XFS_ILOCK_DEP_MASK      0xff000000
 433 #define XFS_LOCK_DEP_MASK       (XFS_IOLOCK_DEP_MASK | XFS_ILOCK_DEP_MASK)
 434
 435 #define XFS_IOLOCK_DEP(flags)   (((flags) & XFS_IOLOCK_DEP_MASK) >> XFS_IOLOCK_SHIFT)
 436 #define XFS_ILOCK_DEP(flags)    (((flags) & XFS_ILOCK_DEP_MASK) >> XFS_ILOCK_SHIFT)
 437
 438 /*
 439  * Flags for xfs_iflush()
 440  */
 441 #define XFS_IFLUSH_DELWRI_ELSE_SYNC     1
 442 #define XFS_IFLUSH_DELWRI_ELSE_ASYNC    2
 443 #define XFS_IFLUSH_SYNC                 3
 444 #define XFS_IFLUSH_ASYNC                4
 445 #define XFS_IFLUSH_DELWRI               5
 446 #define XFS_IFLUSH_ASYNC_NOBLOCK        6
 447
 448 /*
 449  * Flags for xfs_itruncate_start().
 450  */
 451 #define XFS_ITRUNC_DEFINITE     0x1
 452 #define XFS_ITRUNC_MAYBE        0x2
 453
 454 /*
 455  * For multiple groups support: if S_ISGID bit is set in the parent
 456  * directory, group of new file is set to that of the parent, and
 457  * new subdirectory gets S_ISGID bit from parent.
 458  */
 459 #define XFS_INHERIT_GID(pip)    \
 460         (((pip)->i_mount->m_flags & XFS_MOUNT_GRPID) || \
 461          ((pip)->i_d.di_mode & S_ISGID))
 462
 463 /*
 464  * Flags for xfs_iget()
 465  */
 466 #define XFS_IGET_CREATE         0x1
 467 #define XFS_IGET_BULKSTAT       0x2
 468
 469 /*
 470  * xfs_iget.c prototypes.
 471  */
 472 void            xfs_ihash_init(struct xfs_mount *);
 473 void            xfs_ihash_free(struct xfs_mount *);
 474 xfs_inode_t     *xfs_inode_incore(struct xfs_mount *, xfs_ino_t,
 475                                   struct xfs_trans *);
 476 int             xfs_iget(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
 477                          uint, uint, xfs_inode_t **, xfs_daddr_t);
 478 void            xfs_iput(xfs_inode_t *, uint);
 479 void            xfs_iput_new(xfs_inode_t *, uint);
 480 void            xfs_ilock(xfs_inode_t *, uint);
 481 int             xfs_ilock_nowait(xfs_inode_t *, uint);
 482 void            xfs_iunlock(xfs_inode_t *, uint);
 483 void            xfs_ilock_demote(xfs_inode_t *, uint);
 484 int             xfs_isilocked(xfs_inode_t *, uint);
 485 uint            xfs_ilock_map_shared(xfs_inode_t *);
 486 void            xfs_iunlock_map_shared(xfs_inode_t *, uint);
 487 void            xfs_ireclaim(xfs_inode_t *);
 488 int             xfs_finish_reclaim(xfs_inode_t *, int, int);
 489 int             xfs_finish_reclaim_all(struct xfs_mount *, int);
 490
 491 /*
 492  * xfs_inode.c prototypes.
 493  */
 494 int             xfs_itobp(struct xfs_mount *, struct xfs_trans *,
 495                           xfs_inode_t *, struct xfs_dinode **, struct xfs_buf **,
 496                           xfs_daddr_t, uint, uint);
 497 int             xfs_iread(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
 498                           xfs_inode_t **, xfs_daddr_t, uint);
 499 int             xfs_iread_extents(struct xfs_trans *, xfs_inode_t *, int);
 500 int             xfs_ialloc(struct xfs_trans *, xfs_inode_t *, mode_t,
 501                            xfs_nlink_t, xfs_dev_t, struct cred *, xfs_prid_t,
 502                            int, struct xfs_buf **, boolean_t *, xfs_inode_t **);
 503 void            xfs_dinode_from_disk(struct xfs_icdinode *,
 504                                      struct xfs_dinode_core *);
 505 void            xfs_dinode_to_disk(struct xfs_dinode_core *,
 506                                    struct xfs_icdinode *);
 507
 508 uint            xfs_ip2xflags(struct xfs_inode *);
 509 uint            xfs_dic2xflags(struct xfs_dinode *);
 510 int             xfs_ifree(struct xfs_trans *, xfs_inode_t *,
 511                            struct xfs_bmap_free *);
 512 int             xfs_itruncate_start(xfs_inode_t *, uint, xfs_fsize_t);
 513 int             xfs_itruncate_finish(struct xfs_trans **, xfs_inode_t *,
 514                                      xfs_fsize_t, int, int);
 515 int             xfs_iunlink(struct xfs_trans *, xfs_inode_t *);
 516
 517 void            xfs_idestroy_fork(xfs_inode_t *, int);
 518 void            xfs_idestroy(xfs_inode_t *);
 519 void            xfs_idata_realloc(xfs_inode_t *, int, int);
 520 void            xfs_iextract(xfs_inode_t *);
 521 void            xfs_iext_realloc(xfs_inode_t *, int, int);
 522 void            xfs_iroot_realloc(xfs_inode_t *, int, int);
 523 void            xfs_ipin(xfs_inode_t *);
 524 void            xfs_iunpin(xfs_inode_t *);
 525 int             xfs_iextents_copy(xfs_inode_t *, xfs_bmbt_rec_t *, int);
 526 int             xfs_iflush(xfs_inode_t *, uint);
 527 void            xfs_iflush_all(struct xfs_mount *);
 528 void            xfs_ichgtime(xfs_inode_t *, int);
 529 xfs_fsize_t     xfs_file_last_byte(xfs_inode_t *);
 530 void            xfs_lock_inodes(xfs_inode_t **, int, uint);
 531 void            xfs_lock_two_inodes(xfs_inode_t *, xfs_inode_t *, uint);
 532
 533 void            xfs_synchronize_atime(xfs_inode_t *);
 534 void            xfs_mark_inode_dirty_sync(xfs_inode_t *);
 535
 536 xfs_bmbt_rec_host_t *xfs_iext_get_ext(xfs_ifork_t *, xfs_extnum_t);
 537 void            xfs_iext_insert(xfs_ifork_t *, xfs_extnum_t, xfs_extnum_t,
 538                                 xfs_bmbt_irec_t *);
 539 void            xfs_iext_add(xfs_ifork_t *, xfs_extnum_t, int);
 540 void            xfs_iext_add_indirect_multi(xfs_ifork_t *, int, xfs_extnum_t, int);
 541 void            xfs_iext_remove(xfs_ifork_t *, xfs_extnum_t, int);
 542 void            xfs_iext_remove_inline(xfs_ifork_t *, xfs_extnum_t, int);
 543 void            xfs_iext_remove_direct(xfs_ifork_t *, xfs_extnum_t, int);
 544 void            xfs_iext_remove_indirect(xfs_ifork_t *, xfs_extnum_t, int);
 545 void            xfs_iext_realloc_direct(xfs_ifork_t *, int);
 546 void            xfs_iext_realloc_indirect(xfs_ifork_t *, int);
 547 void            xfs_iext_indirect_to_direct(xfs_ifork_t *);
 548 void            xfs_iext_direct_to_inline(xfs_ifork_t *, xfs_extnum_t);
 549 void            xfs_iext_inline_to_direct(xfs_ifork_t *, int);
 550 void            xfs_iext_destroy(xfs_ifork_t *);
 551 xfs_bmbt_rec_host_t *xfs_iext_bno_to_ext(xfs_ifork_t *, xfs_fileoff_t, int *);
 552 xfs_ext_irec_t  *xfs_iext_bno_to_irec(xfs_ifork_t *, xfs_fileoff_t, int *);
 553 xfs_ext_irec_t  *xfs_iext_idx_to_irec(xfs_ifork_t *, xfs_extnum_t *, int *, int);
 554 void            xfs_iext_irec_init(xfs_ifork_t *);
 555 xfs_ext_irec_t *xfs_iext_irec_new(xfs_ifork_t *, int);
 556 void            xfs_iext_irec_remove(xfs_ifork_t *, int);
 557 void            xfs_iext_irec_compact(xfs_ifork_t *);
 558 void            xfs_iext_irec_compact_pages(xfs_ifork_t *);
 559 void            xfs_iext_irec_compact_full(xfs_ifork_t *);
 560 void            xfs_iext_irec_update_extoffs(xfs_ifork_t *, int, int);
 561
 562 #define xfs_ipincount(ip)       ((unsigned int) atomic_read(&ip->i_pincount))
 563
 564 #ifdef DEBUG
 565 void            xfs_isize_check(struct xfs_mount *, xfs_inode_t *, xfs_fsize_t);
 566 #else   /* DEBUG */
 567 #define xfs_isize_check(mp, ip, isize)
 568 #endif  /* DEBUG */
 569
 570 #if defined(DEBUG)
 571 void            xfs_inobp_check(struct xfs_mount *, struct xfs_buf *);
 572 #else
 573 #define xfs_inobp_check(mp, bp)
 574 #endif /* DEBUG */
 575
 576 extern struct kmem_zone *xfs_ifork_zone;
 577 extern struct kmem_zone *xfs_inode_zone;
 578 extern struct kmem_zone *xfs_ili_zone;
 579
 580 /*
 581  * Manage the i_flush queue embedded in the inode.  This completion
 582  * queue synchronizes processes attempting to flush the in-core
 583  * inode back to disk.
 584  */
 585 static inline void xfs_iflock(xfs_inode_t *ip)
 586 {
 587         wait_for_completion(&ip->i_flush);
 588 }
 589
 590 static inline int xfs_iflock_nowait(xfs_inode_t *ip)
 591 {
 592         return try_wait_for_completion(&ip->i_flush);
 593 }
 594
 595 static inline void xfs_ifunlock(xfs_inode_t *ip)
 596 {
 597         complete(&ip->i_flush);
 598 }
 599
 600 #endif  /* __KERNEL__ */
 601
 602 #endif  /* __XFS_INODE_H__ */