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         union {
  70                 xfs_bmbt_rec_host_t *if_extents;/* linear map file exts */
  71                 xfs_ext_irec_t  *if_ext_irec;   /* irec map file exts */
  72                 char            *if_data;       /* inline file data */
  73         } if_u1;
  74         union {
  75                 xfs_bmbt_rec_host_t if_inline_ext[XFS_INLINE_EXTS];
  76                                                 /* very small file extents */
  77                 char            if_inline_data[XFS_INLINE_DATA];
  78                                                 /* very small file data */
  79                 xfs_dev_t       if_rdev;        /* dev number if special */
  80                 uuid_t          if_uuid;        /* mount point value */
  81         } if_u2;
  82 } xfs_ifork_t;
  83
  84 /*
  85  * Inode location information.  Stored in the inode and passed to
  86  * xfs_imap_to_bp() to get a buffer and dinode for a given inode.
  87  */
  88 struct xfs_imap {
  89         xfs_daddr_t     im_blkno;       /* starting BB of inode chunk */
  90         ushort          im_len;         /* length in BBs of inode chunk */
  91         ushort          im_boffset;     /* inode offset in block in bytes */
  92 };
  93
  94 /*
  95  * This is the xfs in-core inode structure.
  96  * Most of the on-disk inode is embedded in the i_d field.
  97  *
  98  * The extent pointers/inline file space, however, are managed
  99  * separately.  The memory for this information is pointed to by
 100  * the if_u1 unions depending on the type of the data.
 101  * This is used to linearize the array of extents for fast in-core
 102  * access.  This is used until the file's number of extents
 103  * surpasses XFS_MAX_INCORE_EXTENTS, at which point all extent pointers
 104  * are accessed through the buffer cache.
 105  *
 106  * Other state kept in the in-core inode is used for identification,
 107  * locking, transactional updating, etc of the inode.
 108  *
 109  * Generally, we do not want to hold the i_rlock while holding the
 110  * i_ilock. Hierarchy is i_iolock followed by i_rlock.
 111  *
 112  * xfs_iptr_t contains all the inode fields up to and including the
 113  * i_mnext and i_mprev fields, it is used as a marker in the inode
 114  * chain off the mount structure by xfs_sync calls.
 115  */
 116
 117 typedef struct xfs_ictimestamp {
 118         __int32_t       t_sec;          /* timestamp seconds */
 119         __int32_t       t_nsec;         /* timestamp nanoseconds */
 120 } xfs_ictimestamp_t;
 121
 122 /*
 123  * NOTE:  This structure must be kept identical to struct xfs_dinode
 124  *        in xfs_dinode.h except for the endianness annotations.
 125  */
 126 typedef struct xfs_icdinode {
 127         __uint16_t      di_magic;       /* inode magic # = XFS_DINODE_MAGIC */
 128         __uint16_t      di_mode;        /* mode and type of file */
 129         __int8_t        di_version;     /* inode version */
 130         __int8_t        di_format;      /* format of di_c data */
 131         __uint16_t      di_onlink;      /* old number of links to file */
 132         __uint32_t      di_uid;         /* owner's user id */
 133         __uint32_t      di_gid;         /* owner's group id */
 134         __uint32_t      di_nlink;       /* number of links to file */
 135         __uint16_t      di_projid_lo;   /* lower part of owner's project id */
 136         __uint16_t      di_projid_hi;   /* higher part of owner's project id */
 137         __uint8_t       di_pad[6];      /* unused, zeroed space */
 138         __uint16_t      di_flushiter;   /* incremented on flush */
 139         xfs_ictimestamp_t di_atime;     /* time last accessed */
 140         xfs_ictimestamp_t di_mtime;     /* time last modified */
 141         xfs_ictimestamp_t di_ctime;     /* time created/inode modified */
 142         xfs_fsize_t     di_size;        /* number of bytes in file */
 143         xfs_drfsbno_t   di_nblocks;     /* # of direct & btree blocks used */
 144         xfs_extlen_t    di_extsize;     /* basic/minimum extent size for file */
 145         xfs_extnum_t    di_nextents;    /* number of extents in data fork */
 146         xfs_aextnum_t   di_anextents;   /* number of extents in attribute fork*/
 147         __uint8_t       di_forkoff;     /* attr fork offs, <<3 for 64b align */
 148         __int8_t        di_aformat;     /* format of attr fork's data */
 149         __uint32_t      di_dmevmask;    /* DMIG event mask */
 150         __uint16_t      di_dmstate;     /* DMIG state info */
 151         __uint16_t      di_flags;       /* random flags, XFS_DIFLAG_... */
 152         __uint32_t      di_gen;         /* generation number */
 153 } xfs_icdinode_t;
 154
 155 /*
 156  * Flags for xfs_ichgtime().
 157  */
 158 #define XFS_ICHGTIME_MOD        0x1     /* data fork modification timestamp */
 159 #define XFS_ICHGTIME_CHG        0x2     /* inode field change timestamp */
 160
 161 /*
 162  * Per-fork incore inode flags.
 163  */
 164 #define XFS_IFINLINE    0x01    /* Inline data is read in */
 165 #define XFS_IFEXTENTS   0x02    /* All extent pointers are read in */
 166 #define XFS_IFBROOT     0x04    /* i_broot points to the bmap b-tree root */
 167 #define XFS_IFEXTIREC   0x08    /* Indirection array of extent blocks */
 168
 169 /*
 170  * Fork handling.
 171  */
 172
 173 #define XFS_IFORK_Q(ip)                 ((ip)->i_d.di_forkoff != 0)
 174 #define XFS_IFORK_BOFF(ip)              ((int)((ip)->i_d.di_forkoff << 3))
 175
 176 #define XFS_IFORK_PTR(ip,w)             \
 177         ((w) == XFS_DATA_FORK ? \
 178                 &(ip)->i_df : \
 179                 (ip)->i_afp)
 180 #define XFS_IFORK_DSIZE(ip) \
 181         (XFS_IFORK_Q(ip) ? \
 182                 XFS_IFORK_BOFF(ip) : \
 183                 XFS_LITINO((ip)->i_mount))
 184 #define XFS_IFORK_ASIZE(ip) \
 185         (XFS_IFORK_Q(ip) ? \
 186                 XFS_LITINO((ip)->i_mount) - XFS_IFORK_BOFF(ip) : \
 187                 0)
 188 #define XFS_IFORK_SIZE(ip,w) \
 189         ((w) == XFS_DATA_FORK ? \
 190                 XFS_IFORK_DSIZE(ip) : \
 191                 XFS_IFORK_ASIZE(ip))
 192 #define XFS_IFORK_FORMAT(ip,w) \
 193         ((w) == XFS_DATA_FORK ? \
 194                 (ip)->i_d.di_format : \
 195                 (ip)->i_d.di_aformat)
 196 #define XFS_IFORK_FMT_SET(ip,w,n) \
 197         ((w) == XFS_DATA_FORK ? \
 198                 ((ip)->i_d.di_format = (n)) : \
 199                 ((ip)->i_d.di_aformat = (n)))
 200 #define XFS_IFORK_NEXTENTS(ip,w) \
 201         ((w) == XFS_DATA_FORK ? \
 202                 (ip)->i_d.di_nextents : \
 203                 (ip)->i_d.di_anextents)
 204 #define XFS_IFORK_NEXT_SET(ip,w,n) \
 205         ((w) == XFS_DATA_FORK ? \
 206                 ((ip)->i_d.di_nextents = (n)) : \
 207                 ((ip)->i_d.di_anextents = (n)))
 208 #define XFS_IFORK_MAXEXT(ip, w) \
 209         (XFS_IFORK_SIZE(ip, w) / sizeof(xfs_bmbt_rec_t))
 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         atomic_t                i_pincount;     /* inode pin count */
 241         spinlock_t              i_flags_lock;   /* inode i_flags lock */
 242         /* Miscellaneous state. */
 243         unsigned long           i_flags;        /* see defined flags below */
 244         unsigned int            i_delayed_blks; /* count of delay alloc blks */
 245
 246         xfs_icdinode_t          i_d;            /* most of ondisk inode */
 247
 248         /* VFS inode */
 249         struct inode            i_vnode;        /* embedded VFS inode */
 250 } xfs_inode_t;
 251
 252 /* Convert from vfs inode to xfs inode */
 253 static inline struct xfs_inode *XFS_I(struct inode *inode)
 254 {
 255         return container_of(inode, struct xfs_inode, i_vnode);
 256 }
 257
 258 /* convert from xfs inode to vfs inode */
 259 static inline struct inode *VFS_I(struct xfs_inode *ip)
 260 {
 261         return &ip->i_vnode;
 262 }
 263
 264 /*
 265  * For regular files we only update the on-disk filesize when actually
 266  * writing data back to disk.  Until then only the copy in the VFS inode
 267  * is uptodate.
 268  */
 269 static inline xfs_fsize_t XFS_ISIZE(struct xfs_inode *ip)
 270 {
 271         if (S_ISREG(ip->i_d.di_mode))
 272                 return i_size_read(VFS_I(ip));
 273         return ip->i_d.di_size;
 274 }
 275
 276 /*
 277  * If this I/O goes past the on-disk inode size update it unless it would
 278  * be past the current in-core inode size.
 279  */
 280 static inline xfs_fsize_t
 281 xfs_new_eof(struct xfs_inode *ip, xfs_fsize_t new_size)
 282 {
 283         xfs_fsize_t i_size = i_size_read(VFS_I(ip));
 284
 285         if (new_size > i_size)
 286                 new_size = i_size;
 287         return new_size > ip->i_d.di_size ? new_size : 0;
 288 }
 289
 290 /*
 291  * i_flags helper functions
 292  */
 293 static inline void
 294 __xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
 295 {
 296         ip->i_flags |= flags;
 297 }
 298
 299 static inline void
 300 xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
 301 {
 302         spin_lock(&ip->i_flags_lock);
 303         __xfs_iflags_set(ip, flags);
 304         spin_unlock(&ip->i_flags_lock);
 305 }
 306
 307 static inline void
 308 xfs_iflags_clear(xfs_inode_t *ip, unsigned short flags)
 309 {
 310         spin_lock(&ip->i_flags_lock);
 311         ip->i_flags &= ~flags;
 312         spin_unlock(&ip->i_flags_lock);
 313 }
 314
 315 static inline int
 316 __xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
 317 {
 318         return (ip->i_flags & flags);
 319 }
 320
 321 static inline int
 322 xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
 323 {
 324         int ret;
 325         spin_lock(&ip->i_flags_lock);
 326         ret = __xfs_iflags_test(ip, flags);
 327         spin_unlock(&ip->i_flags_lock);
 328         return ret;
 329 }
 330
 331 static inline int
 332 xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned short flags)
 333 {
 334         int ret;
 335
 336         spin_lock(&ip->i_flags_lock);
 337         ret = ip->i_flags & flags;
 338         if (ret)
 339                 ip->i_flags &= ~flags;
 340         spin_unlock(&ip->i_flags_lock);
 341         return ret;
 342 }
 343
 344 static inline int
 345 xfs_iflags_test_and_set(xfs_inode_t *ip, unsigned short flags)
 346 {
 347         int ret;
 348
 349         spin_lock(&ip->i_flags_lock);
 350         ret = ip->i_flags & flags;
 351         if (!ret)
 352                 ip->i_flags |= flags;
 353         spin_unlock(&ip->i_flags_lock);
 354         return ret;
 355 }
 356
 357 /*
 358  * Project quota id helpers (previously projid was 16bit only
 359  * and using two 16bit values to hold new 32bit projid was chosen
 360  * to retain compatibility with "old" filesystems).
 361  */
 362 static inline prid_t
 363 xfs_get_projid(struct xfs_inode *ip)
 364 {
 365         return (prid_t)ip->i_d.di_projid_hi << 16 | ip->i_d.di_projid_lo;
 366 }
 367
 368 static inline void
 369 xfs_set_projid(struct xfs_inode *ip,
 370                 prid_t projid)
 371 {
 372         ip->i_d.di_projid_hi = (__uint16_t) (projid >> 16);
 373         ip->i_d.di_projid_lo = (__uint16_t) (projid & 0xffff);
 374 }
 375
 376 /*
 377  * In-core inode flags.
 378  */
 379 #define XFS_IRECLAIM            (1 << 0) /* started reclaiming this inode */
 380 #define XFS_ISTALE              (1 << 1) /* inode has been staled */
 381 #define XFS_IRECLAIMABLE        (1 << 2) /* inode can be reclaimed */
 382 #define XFS_INEW                (1 << 3) /* inode has just been allocated */
 383 #define XFS_IFILESTREAM         (1 << 4) /* inode is in a filestream dir. */
 384 #define XFS_ITRUNCATED          (1 << 5) /* truncated down so flush-on-close */
 385 #define XFS_IDIRTY_RELEASE      (1 << 6) /* dirty release already seen */
 386 #define __XFS_IFLOCK_BIT        7        /* inode is being flushed right now */
 387 #define XFS_IFLOCK              (1 << __XFS_IFLOCK_BIT)
 388 #define __XFS_IPINNED_BIT       8        /* wakeup key for zero pin count */
 389 #define XFS_IPINNED             (1 << __XFS_IPINNED_BIT)
 390 #define XFS_IDONTCACHE          (1 << 9) /* don't cache the inode long term */
 391
 392 /*
 393  * Per-lifetime flags need to be reset when re-using a reclaimable inode during
 394  * inode lookup. This prevents unintended behaviour on the new inode from
 395  * ocurring.
 396  */
 397 #define XFS_IRECLAIM_RESET_FLAGS        \
 398         (XFS_IRECLAIMABLE | XFS_IRECLAIM | \
 399          XFS_IDIRTY_RELEASE | XFS_ITRUNCATED | \
 400          XFS_IFILESTREAM);
 401
 402 /*
 403  * Synchronize processes attempting to flush the in-core inode back to disk.
 404  */
 405
 406 extern void __xfs_iflock(struct xfs_inode *ip);
 407
 408 static inline int xfs_iflock_nowait(struct xfs_inode *ip)
 409 {
 410         return !xfs_iflags_test_and_set(ip, XFS_IFLOCK);
 411 }
 412
 413 static inline void xfs_iflock(struct xfs_inode *ip)
 414 {
 415         if (!xfs_iflock_nowait(ip))
 416                 __xfs_iflock(ip);
 417 }
 418
 419 static inline void xfs_ifunlock(struct xfs_inode *ip)
 420 {
 421         xfs_iflags_clear(ip, XFS_IFLOCK);
 422         wake_up_bit(&ip->i_flags, __XFS_IFLOCK_BIT);
 423 }
 424
 425 static inline int xfs_isiflocked(struct xfs_inode *ip)
 426 {
 427         return xfs_iflags_test(ip, XFS_IFLOCK);
 428 }
 429
 430 /*
 431  * Flags for inode locking.
 432  * Bit ranges:  1<<1  - 1<<16-1 -- iolock/ilock modes (bitfield)
 433  *              1<<16 - 1<<32-1 -- lockdep annotation (integers)
 434  */
 435 #define XFS_IOLOCK_EXCL         (1<<0)
 436 #define XFS_IOLOCK_SHARED       (1<<1)
 437 #define XFS_ILOCK_EXCL          (1<<2)
 438 #define XFS_ILOCK_SHARED        (1<<3)
 439
 440 #define XFS_LOCK_MASK           (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \
 441                                 | XFS_ILOCK_EXCL | XFS_ILOCK_SHARED)
 442
 443 #define XFS_LOCK_FLAGS \
 444         { XFS_IOLOCK_EXCL,      "IOLOCK_EXCL" }, \
 445         { XFS_IOLOCK_SHARED,    "IOLOCK_SHARED" }, \
 446         { XFS_ILOCK_EXCL,       "ILOCK_EXCL" }, \
 447         { XFS_ILOCK_SHARED,     "ILOCK_SHARED" }
 448
 449
 450 /*
 451  * Flags for lockdep annotations.
 452  *
 453  * XFS_LOCK_PARENT - for directory operations that require locking a
 454  * parent directory inode and a child entry inode.  The parent gets locked
 455  * with this flag so it gets a lockdep subclass of 1 and the child entry
 456  * lock will have a lockdep subclass of 0.
 457  *
 458  * XFS_LOCK_RTBITMAP/XFS_LOCK_RTSUM - the realtime device bitmap and summary
 459  * inodes do not participate in the normal lock order, and thus have their
 460  * own subclasses.
 461  *
 462  * XFS_LOCK_INUMORDER - for locking several inodes at the some time
 463  * with xfs_lock_inodes().  This flag is used as the starting subclass
 464  * and each subsequent lock acquired will increment the subclass by one.
 465  * So the first lock acquired will have a lockdep subclass of 4, the
 466  * second lock will have a lockdep subclass of 5, and so on. It is
 467  * the responsibility of the class builder to shift this to the correct
 468  * portion of the lock_mode lockdep mask.
 469  */
 470 #define XFS_LOCK_PARENT         1
 471 #define XFS_LOCK_RTBITMAP       2
 472 #define XFS_LOCK_RTSUM          3
 473 #define XFS_LOCK_INUMORDER      4
 474
 475 #define XFS_IOLOCK_SHIFT        16
 476 #define XFS_IOLOCK_PARENT       (XFS_LOCK_PARENT << XFS_IOLOCK_SHIFT)
 477
 478 #define XFS_ILOCK_SHIFT         24
 479 #define XFS_ILOCK_PARENT        (XFS_LOCK_PARENT << XFS_ILOCK_SHIFT)
 480 #define XFS_ILOCK_RTBITMAP      (XFS_LOCK_RTBITMAP << XFS_ILOCK_SHIFT)
 481 #define XFS_ILOCK_RTSUM         (XFS_LOCK_RTSUM << XFS_ILOCK_SHIFT)
 482
 483 #define XFS_IOLOCK_DEP_MASK     0x00ff0000
 484 #define XFS_ILOCK_DEP_MASK      0xff000000
 485 #define XFS_LOCK_DEP_MASK       (XFS_IOLOCK_DEP_MASK | XFS_ILOCK_DEP_MASK)
 486
 487 #define XFS_IOLOCK_DEP(flags)   (((flags) & XFS_IOLOCK_DEP_MASK) >> XFS_IOLOCK_SHIFT)
 488 #define XFS_ILOCK_DEP(flags)    (((flags) & XFS_ILOCK_DEP_MASK) >> XFS_ILOCK_SHIFT)
 489
 490 extern struct lock_class_key xfs_iolock_reclaimable;
 491
 492 /*
 493  * For multiple groups support: if S_ISGID bit is set in the parent
 494  * directory, group of new file is set to that of the parent, and
 495  * new subdirectory gets S_ISGID bit from parent.
 496  */
 497 #define XFS_INHERIT_GID(pip)    \
 498         (((pip)->i_mount->m_flags & XFS_MOUNT_GRPID) || \
 499          ((pip)->i_d.di_mode & S_ISGID))
 500
 501 /*
 502  * xfs_iget.c prototypes.
 503  */
 504 int             xfs_iget(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
 505                          uint, uint, xfs_inode_t **);
 506 void            xfs_ilock(xfs_inode_t *, uint);
 507 int             xfs_ilock_nowait(xfs_inode_t *, uint);
 508 void            xfs_iunlock(xfs_inode_t *, uint);
 509 void            xfs_ilock_demote(xfs_inode_t *, uint);
 510 int             xfs_isilocked(xfs_inode_t *, uint);
 511 uint            xfs_ilock_map_shared(xfs_inode_t *);
 512 void            xfs_iunlock_map_shared(xfs_inode_t *, uint);
 513 void            xfs_inode_free(struct xfs_inode *ip);
 514
 515 /*
 516  * xfs_inode.c prototypes.
 517  */
 518 int             xfs_ialloc(struct xfs_trans *, xfs_inode_t *, umode_t,
 519                            xfs_nlink_t, xfs_dev_t, prid_t, int,
 520                            struct xfs_buf **, boolean_t *, xfs_inode_t **);
 521
 522 uint            xfs_ip2xflags(struct xfs_inode *);
 523 uint            xfs_dic2xflags(struct xfs_dinode *);
 524 int             xfs_ifree(struct xfs_trans *, xfs_inode_t *,
 525                            struct xfs_bmap_free *);
 526 int             xfs_itruncate_extents(struct xfs_trans **, struct xfs_inode *,
 527                                       int, xfs_fsize_t);
 528 int             xfs_iunlink(struct xfs_trans *, xfs_inode_t *);
 529
 530 void            xfs_iext_realloc(xfs_inode_t *, int, int);
 531 void            xfs_iunpin_wait(xfs_inode_t *);
 532 int             xfs_iflush(xfs_inode_t *, uint);
 533 void            xfs_promote_inode(struct xfs_inode *);
 534 void            xfs_lock_inodes(xfs_inode_t **, int, uint);
 535 void            xfs_lock_two_inodes(xfs_inode_t *, xfs_inode_t *, uint);
 536
 537 #define IHOLD(ip) \
 538 do { \
 539         ASSERT(atomic_read(&VFS_I(ip)->i_count) > 0) ; \
 540         ihold(VFS_I(ip)); \
 541         trace_xfs_ihold(ip, _THIS_IP_); \
 542 } while (0)
 543
 544 #define IRELE(ip) \
 545 do { \
 546         trace_xfs_irele(ip, _THIS_IP_); \
 547         iput(VFS_I(ip)); \
 548 } while (0)
 549
 550 #endif /* __KERNEL__ */
 551
 552 /*
 553  * Flags for xfs_iget()
 554  */
 555 #define XFS_IGET_CREATE         0x1
 556 #define XFS_IGET_UNTRUSTED      0x2
 557 #define XFS_IGET_DONTCACHE      0x4
 558
 559 int             xfs_inotobp(struct xfs_mount *, struct xfs_trans *,
 560                             xfs_ino_t, struct xfs_dinode **,
 561                             struct xfs_buf **, int *, uint);
 562 int             xfs_itobp(struct xfs_mount *, struct xfs_trans *,
 563                           struct xfs_inode *, struct xfs_dinode **,
 564                           struct xfs_buf **, uint);
 565 int             xfs_iread(struct xfs_mount *, struct xfs_trans *,
 566                           struct xfs_inode *, uint);
 567 void            xfs_dinode_to_disk(struct xfs_dinode *,
 568                                    struct xfs_icdinode *);
 569 void            xfs_idestroy_fork(struct xfs_inode *, int);
 570 void            xfs_idata_realloc(struct xfs_inode *, int, int);
 571 void            xfs_iroot_realloc(struct xfs_inode *, int, int);
 572 int             xfs_iread_extents(struct xfs_trans *, struct xfs_inode *, int);
 573 int             xfs_iextents_copy(struct xfs_inode *, xfs_bmbt_rec_t *, int);
 574
 575 xfs_bmbt_rec_host_t *xfs_iext_get_ext(xfs_ifork_t *, xfs_extnum_t);
 576 void            xfs_iext_insert(xfs_inode_t *, xfs_extnum_t, xfs_extnum_t,
 577                                 xfs_bmbt_irec_t *, int);
 578 void            xfs_iext_add(xfs_ifork_t *, xfs_extnum_t, int);
 579 void            xfs_iext_add_indirect_multi(xfs_ifork_t *, int, xfs_extnum_t, int);
 580 void            xfs_iext_remove(xfs_inode_t *, xfs_extnum_t, int, int);
 581 void            xfs_iext_remove_inline(xfs_ifork_t *, xfs_extnum_t, int);
 582 void            xfs_iext_remove_direct(xfs_ifork_t *, xfs_extnum_t, int);
 583 void            xfs_iext_remove_indirect(xfs_ifork_t *, xfs_extnum_t, int);
 584 void            xfs_iext_realloc_direct(xfs_ifork_t *, int);
 585 void            xfs_iext_direct_to_inline(xfs_ifork_t *, xfs_extnum_t);
 586 void            xfs_iext_inline_to_direct(xfs_ifork_t *, int);
 587 void            xfs_iext_destroy(xfs_ifork_t *);
 588 xfs_bmbt_rec_host_t *xfs_iext_bno_to_ext(xfs_ifork_t *, xfs_fileoff_t, int *);
 589 xfs_ext_irec_t  *xfs_iext_bno_to_irec(xfs_ifork_t *, xfs_fileoff_t, int *);
 590 xfs_ext_irec_t  *xfs_iext_idx_to_irec(xfs_ifork_t *, xfs_extnum_t *, int *, int);
 591 void            xfs_iext_irec_init(xfs_ifork_t *);
 592 xfs_ext_irec_t *xfs_iext_irec_new(xfs_ifork_t *, int);
 593 void            xfs_iext_irec_remove(xfs_ifork_t *, int);
 594 void            xfs_iext_irec_compact(xfs_ifork_t *);
 595 void            xfs_iext_irec_compact_pages(xfs_ifork_t *);
 596 void            xfs_iext_irec_compact_full(xfs_ifork_t *);
 597 void            xfs_iext_irec_update_extoffs(xfs_ifork_t *, int, int);
 598
 599 #define xfs_ipincount(ip)       ((unsigned int) atomic_read(&ip->i_pincount))
 600
 601 #if defined(DEBUG)
 602 void            xfs_inobp_check(struct xfs_mount *, struct xfs_buf *);
 603 #else
 604 #define xfs_inobp_check(mp, bp)
 605 #endif /* DEBUG */
 606
 607 extern struct kmem_zone *xfs_ifork_zone;
 608 extern struct kmem_zone *xfs_inode_zone;
 609 extern struct kmem_zone *xfs_ili_zone;
 610
 611 #endif  /* __XFS_INODE_H__ */