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 bhv_vnode;
 110 struct cred;
 111 struct ktrace;
 112 struct xfs_buf;
 113 struct xfs_bmap_free;
 114 struct xfs_bmbt_irec;
 115 struct xfs_bmbt_block;
 116 struct xfs_inode;
 117 struct xfs_inode_log_item;
 118 struct xfs_mount;
 119 struct xfs_trans;
 120 struct xfs_dquot;
 121
 122 #if defined(XFS_ILOCK_TRACE)
 123 #define XFS_ILOCK_KTRACE_SIZE   32
 124 extern ktrace_t *xfs_ilock_trace_buf;
 125 extern void xfs_ilock_trace(struct xfs_inode *, int, unsigned int, inst_t *);
 126 #else
 127 #define xfs_ilock_trace(i,n,f,ra)
 128 #endif
 129
 130 typedef struct dm_attrs_s {
 131         __uint32_t      da_dmevmask;    /* DMIG event mask */
 132         __uint16_t      da_dmstate;     /* DMIG state info */
 133         __uint16_t      da_pad;         /* DMIG extra padding */
 134 } dm_attrs_t;
 135
 136 typedef struct xfs_iocore {
 137         void                    *io_obj;        /* pointer to container
 138                                                  * inode or dcxvn structure */
 139         struct xfs_mount        *io_mount;      /* fs mount struct ptr */
 140 #ifdef DEBUG
 141         mrlock_t                *io_lock;       /* inode IO lock */
 142         mrlock_t                *io_iolock;     /* inode IO lock */
 143 #endif
 144
 145         /* I/O state */
 146         xfs_fsize_t             io_new_size;    /* sz when write completes */
 147
 148         /* Miscellaneous state. */
 149         unsigned int            io_flags;       /* IO related flags */
 150
 151         /* DMAPI state */
 152         dm_attrs_t              io_dmattrs;
 153
 154 } xfs_iocore_t;
 155
 156 #define        io_dmevmask     io_dmattrs.da_dmevmask
 157 #define        io_dmstate      io_dmattrs.da_dmstate
 158
 159 #define XFS_IO_INODE(io)        ((xfs_inode_t *) ((io)->io_obj))
 160 #define XFS_IO_DCXVN(io)        ((dcxvn_t *) ((io)->io_obj))
 161
 162 /*
 163  * Flags in the flags field
 164  */
 165
 166 #define XFS_IOCORE_RT           0x1
 167
 168 /*
 169  * xfs_iocore prototypes
 170  */
 171
 172 extern void xfs_iocore_inode_init(struct xfs_inode *);
 173 extern void xfs_iocore_inode_reinit(struct xfs_inode *);
 174
 175 /*
 176  * This is the xfs inode cluster structure.  This structure is used by
 177  * xfs_iflush to find inodes that share a cluster and can be flushed to disk at
 178  * the same time.
 179  */
 180 typedef struct xfs_icluster {
 181         struct hlist_head       icl_inodes;     /* list of inodes on cluster */
 182         xfs_daddr_t             icl_blkno;      /* starting block number of
 183                                                  * the cluster */
 184         struct xfs_buf          *icl_buf;       /* the inode buffer */
 185         lock_t                  icl_lock;       /* inode list lock */
 186 } xfs_icluster_t;
 187
 188 /*
 189  * This is the xfs in-core inode structure.
 190  * Most of the on-disk inode is embedded in the i_d field.
 191  *
 192  * The extent pointers/inline file space, however, are managed
 193  * separately.  The memory for this information is pointed to by
 194  * the if_u1 unions depending on the type of the data.
 195  * This is used to linearize the array of extents for fast in-core
 196  * access.  This is used until the file's number of extents
 197  * surpasses XFS_MAX_INCORE_EXTENTS, at which point all extent pointers
 198  * are accessed through the buffer cache.
 199  *
 200  * Other state kept in the in-core inode is used for identification,
 201  * locking, transactional updating, etc of the inode.
 202  *
 203  * Generally, we do not want to hold the i_rlock while holding the
 204  * i_ilock. Hierarchy is i_iolock followed by i_rlock.
 205  *
 206  * xfs_iptr_t contains all the inode fields upto and including the
 207  * i_mnext and i_mprev fields, it is used as a marker in the inode
 208  * chain off the mount structure by xfs_sync calls.
 209  */
 210
 211 typedef struct xfs_ictimestamp {
 212         __int32_t       t_sec;          /* timestamp seconds */
 213         __int32_t       t_nsec;         /* timestamp nanoseconds */
 214 } xfs_ictimestamp_t;
 215
 216 /*
 217  * NOTE:  This structure must be kept identical to struct xfs_dinode_core
 218  *        in xfs_dinode.h except for the endianess annotations.
 219  */
 220 typedef struct xfs_icdinode {
 221         __uint16_t      di_magic;       /* inode magic # = XFS_DINODE_MAGIC */
 222         __uint16_t      di_mode;        /* mode and type of file */
 223         __int8_t        di_version;     /* inode version */
 224         __int8_t        di_format;      /* format of di_c data */
 225         __uint16_t      di_onlink;      /* old number of links to file */
 226         __uint32_t      di_uid;         /* owner's user id */
 227         __uint32_t      di_gid;         /* owner's group id */
 228         __uint32_t      di_nlink;       /* number of links to file */
 229         __uint16_t      di_projid;      /* owner's project id */
 230         __uint8_t       di_pad[8];      /* unused, zeroed space */
 231         __uint16_t      di_flushiter;   /* incremented on flush */
 232         xfs_ictimestamp_t di_atime;     /* time last accessed */
 233         xfs_ictimestamp_t di_mtime;     /* time last modified */
 234         xfs_ictimestamp_t di_ctime;     /* time created/inode modified */
 235         xfs_fsize_t     di_size;        /* number of bytes in file */
 236         xfs_drfsbno_t   di_nblocks;     /* # of direct & btree blocks used */
 237         xfs_extlen_t    di_extsize;     /* basic/minimum extent size for file */
 238         xfs_extnum_t    di_nextents;    /* number of extents in data fork */
 239         xfs_aextnum_t   di_anextents;   /* number of extents in attribute fork*/
 240         __uint8_t       di_forkoff;     /* attr fork offs, <<3 for 64b align */
 241         __int8_t        di_aformat;     /* format of attr fork's data */
 242         __uint32_t      di_dmevmask;    /* DMIG event mask */
 243         __uint16_t      di_dmstate;     /* DMIG state info */
 244         __uint16_t      di_flags;       /* random flags, XFS_DIFLAG_... */
 245         __uint32_t      di_gen;         /* generation number */
 246 } xfs_icdinode_t;
 247
 248 typedef struct {
 249         struct xfs_inode        *ip_mnext;      /* next inode in mount list */
 250         struct xfs_inode        *ip_mprev;      /* ptr to prev inode */
 251         struct xfs_mount        *ip_mount;      /* fs mount struct ptr */
 252 } xfs_iptr_t;
 253
 254 typedef struct xfs_inode {
 255         /* Inode linking and identification information. */
 256         struct xfs_inode        *i_mnext;       /* next inode in mount list */
 257         struct xfs_inode        *i_mprev;       /* ptr to prev inode */
 258         struct xfs_mount        *i_mount;       /* fs mount struct ptr */
 259         struct list_head        i_reclaim;      /* reclaim list */
 260         struct bhv_vnode        *i_vnode;       /* vnode backpointer */
 261         struct xfs_dquot        *i_udquot;      /* user dquot */
 262         struct xfs_dquot        *i_gdquot;      /* group dquot */
 263
 264         /* Inode location stuff */
 265         xfs_ino_t               i_ino;          /* inode number (agno/agino)*/
 266         xfs_daddr_t             i_blkno;        /* blkno of inode buffer */
 267         ushort                  i_len;          /* len of inode buffer */
 268         ushort                  i_boffset;      /* off of inode in buffer */
 269
 270         /* Extent information. */
 271         xfs_ifork_t             *i_afp;         /* attribute fork pointer */
 272         xfs_ifork_t             i_df;           /* data fork */
 273
 274         /* Transaction and locking information. */
 275         struct xfs_trans        *i_transp;      /* ptr to owning transaction*/
 276         struct xfs_inode_log_item *i_itemp;     /* logging information */
 277         mrlock_t                i_lock;         /* inode lock */
 278         mrlock_t                i_iolock;       /* inode IO lock */
 279         sema_t                  i_flock;        /* inode flush lock */
 280         atomic_t                i_pincount;     /* inode pin count */
 281         wait_queue_head_t       i_ipin_wait;    /* inode pinning wait queue */
 282         spinlock_t              i_flags_lock;   /* inode i_flags lock */
 283 #ifdef HAVE_REFCACHE
 284         struct xfs_inode        **i_refcache;   /* ptr to entry in ref cache */
 285         struct xfs_inode        *i_release;     /* inode to unref */
 286 #endif
 287         /* I/O state */
 288         xfs_iocore_t            i_iocore;       /* I/O core */
 289
 290         /* Miscellaneous state. */
 291         unsigned short          i_flags;        /* see defined flags below */
 292         unsigned char           i_update_core;  /* timestamps/size is dirty */
 293         unsigned char           i_update_size;  /* di_size field is dirty */
 294         unsigned int            i_gen;          /* generation count */
 295         unsigned int            i_delayed_blks; /* count of delay alloc blks */
 296
 297         xfs_icdinode_t          i_d;            /* most of ondisk inode */
 298         xfs_icluster_t          *i_cluster;     /* cluster list header */
 299         struct hlist_node       i_cnode;        /* cluster link node */
 300
 301         xfs_fsize_t             i_size;         /* in-memory size */
 302         /* Trace buffers per inode. */
 303 #ifdef XFS_BMAP_TRACE
 304         struct ktrace           *i_xtrace;      /* inode extent list trace */
 305 #endif
 306 #ifdef XFS_BMBT_TRACE
 307         struct ktrace           *i_btrace;      /* inode bmap btree trace */
 308 #endif
 309 #ifdef XFS_RW_TRACE
 310         struct ktrace           *i_rwtrace;     /* inode read/write trace */
 311 #endif
 312 #ifdef XFS_ILOCK_TRACE
 313         struct ktrace           *i_lock_trace;  /* inode lock/unlock trace */
 314 #endif
 315 #ifdef XFS_DIR2_TRACE
 316         struct ktrace           *i_dir_trace;   /* inode directory trace */
 317 #endif
 318 } xfs_inode_t;
 319
 320 #define XFS_ISIZE(ip)   (((ip)->i_d.di_mode & S_IFMT) == S_IFREG) ? \
 321                                 (ip)->i_size : (ip)->i_d.di_size;
 322
 323 /*
 324  * i_flags helper functions
 325  */
 326 static inline void
 327 __xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
 328 {
 329         ip->i_flags |= flags;
 330 }
 331
 332 static inline void
 333 xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
 334 {
 335         spin_lock(&ip->i_flags_lock);
 336         __xfs_iflags_set(ip, flags);
 337         spin_unlock(&ip->i_flags_lock);
 338 }
 339
 340 static inline void
 341 xfs_iflags_clear(xfs_inode_t *ip, unsigned short flags)
 342 {
 343         spin_lock(&ip->i_flags_lock);
 344         ip->i_flags &= ~flags;
 345         spin_unlock(&ip->i_flags_lock);
 346 }
 347
 348 static inline int
 349 __xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
 350 {
 351         return (ip->i_flags & flags);
 352 }
 353
 354 static inline int
 355 xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
 356 {
 357         int ret;
 358         spin_lock(&ip->i_flags_lock);
 359         ret = __xfs_iflags_test(ip, flags);
 360         spin_unlock(&ip->i_flags_lock);
 361         return ret;
 362 }
 363 #endif  /* __KERNEL__ */
 364
 365
 366 /*
 367  * Fork handling.
 368  */
 369 #define XFS_IFORK_PTR(ip,w)             \
 370         ((w) == XFS_DATA_FORK ? &(ip)->i_df : (ip)->i_afp)
 371 #define XFS_IFORK_Q(ip)                 XFS_CFORK_Q(&(ip)->i_d)
 372 #define XFS_IFORK_DSIZE(ip)             XFS_CFORK_DSIZE(&ip->i_d, ip->i_mount)
 373 #define XFS_IFORK_ASIZE(ip)             XFS_CFORK_ASIZE(&ip->i_d, ip->i_mount)
 374 #define XFS_IFORK_SIZE(ip,w)            XFS_CFORK_SIZE(&ip->i_d, ip->i_mount, w)
 375 #define XFS_IFORK_FORMAT(ip,w)          XFS_CFORK_FORMAT(&ip->i_d, w)
 376 #define XFS_IFORK_FMT_SET(ip,w,n)       XFS_CFORK_FMT_SET(&ip->i_d, w, n)
 377 #define XFS_IFORK_NEXTENTS(ip,w)        XFS_CFORK_NEXTENTS(&ip->i_d, w)
 378 #define XFS_IFORK_NEXT_SET(ip,w,n)      XFS_CFORK_NEXT_SET(&ip->i_d, w, n)
 379
 380
 381 #ifdef __KERNEL__
 382
 383 /*
 384  * In-core inode flags.
 385  */
 386 #define XFS_IGRIO       0x0001  /* inode used for guaranteed rate i/o */
 387 #define XFS_IUIOSZ      0x0002  /* inode i/o sizes have been explicitly set */
 388 #define XFS_IQUIESCE    0x0004  /* we have started quiescing for this inode */
 389 #define XFS_IRECLAIM    0x0008  /* we have started reclaiming this inode    */
 390 #define XFS_ISTALE      0x0010  /* inode has been staled */
 391 #define XFS_IRECLAIMABLE 0x0020 /* inode can be reclaimed */
 392 #define XFS_INEW        0x0040
 393 #define XFS_IFILESTREAM 0x0080  /* inode is in a filestream directory */
 394
 395 /*
 396  * Flags for inode locking.
 397  * Bit ranges:  1<<1  - 1<<16-1 -- iolock/ilock modes (bitfield)
 398  *              1<<16 - 1<<32-1 -- lockdep annotation (integers)
 399  */
 400 #define XFS_IOLOCK_EXCL         (1<<0)
 401 #define XFS_IOLOCK_SHARED       (1<<1)
 402 #define XFS_ILOCK_EXCL          (1<<2)
 403 #define XFS_ILOCK_SHARED        (1<<3)
 404 #define XFS_IUNLOCK_NONOTIFY    (1<<4)
 405 /*      #define XFS_IOLOCK_NESTED       (1<<5)  */
 406 #define XFS_EXTENT_TOKEN_RD     (1<<6)
 407 #define XFS_SIZE_TOKEN_RD       (1<<7)
 408 #define XFS_EXTSIZE_RD          (XFS_EXTENT_TOKEN_RD|XFS_SIZE_TOKEN_RD)
 409 #define XFS_WILLLEND            (1<<8)  /* Always acquire tokens for lending */
 410 #define XFS_EXTENT_TOKEN_WR     (XFS_EXTENT_TOKEN_RD | XFS_WILLLEND)
 411 #define XFS_SIZE_TOKEN_WR       (XFS_SIZE_TOKEN_RD | XFS_WILLLEND)
 412 #define XFS_EXTSIZE_WR          (XFS_EXTSIZE_RD | XFS_WILLLEND)
 413 /* TODO:XFS_SIZE_TOKEN_WANT     (1<<9) */
 414
 415 #define XFS_LOCK_MASK           (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \
 416                                 | XFS_ILOCK_EXCL | XFS_ILOCK_SHARED \
 417                                 | XFS_EXTENT_TOKEN_RD | XFS_SIZE_TOKEN_RD \
 418                                 | XFS_WILLLEND)
 419
 420 /*
 421  * Flags for lockdep annotations.
 422  *
 423  * XFS_I[O]LOCK_PARENT - for operations that require locking two inodes
 424  * (ie directory operations that require locking a directory inode and
 425  * an entry inode).  The first inode gets locked with this flag so it
 426  * gets a lockdep subclass of 1 and the second lock will have a lockdep
 427  * subclass of 0.
 428  *
 429  * XFS_LOCK_INUMORDER - for locking several inodes at the some time
 430  * with xfs_lock_inodes().  This flag is used as the starting subclass
 431  * and each subsequent lock acquired will increment the subclass by one.
 432  * So the first lock acquired will have a lockdep subclass of 2, the
 433  * second lock will have a lockdep subclass of 3, and so on. It is
 434  * the responsibility of the class builder to shift this to the correct
 435  * portion of the lock_mode lockdep mask.
 436  */
 437 #define XFS_LOCK_PARENT         1
 438 #define XFS_LOCK_INUMORDER      2
 439
 440 #define XFS_IOLOCK_SHIFT        16
 441 #define XFS_IOLOCK_PARENT       (XFS_LOCK_PARENT << XFS_IOLOCK_SHIFT)
 442
 443 #define XFS_ILOCK_SHIFT         24
 444 #define XFS_ILOCK_PARENT        (XFS_LOCK_PARENT << XFS_ILOCK_SHIFT)
 445
 446 #define XFS_IOLOCK_DEP_MASK     0x00ff0000
 447 #define XFS_ILOCK_DEP_MASK      0xff000000
 448 #define XFS_LOCK_DEP_MASK       (XFS_IOLOCK_DEP_MASK | XFS_ILOCK_DEP_MASK)
 449
 450 #define XFS_IOLOCK_DEP(flags)   (((flags) & XFS_IOLOCK_DEP_MASK) >> XFS_IOLOCK_SHIFT)
 451 #define XFS_ILOCK_DEP(flags)    (((flags) & XFS_ILOCK_DEP_MASK) >> XFS_ILOCK_SHIFT)
 452
 453 /*
 454  * Flags for xfs_iflush()
 455  */
 456 #define XFS_IFLUSH_DELWRI_ELSE_SYNC     1
 457 #define XFS_IFLUSH_DELWRI_ELSE_ASYNC    2
 458 #define XFS_IFLUSH_SYNC                 3
 459 #define XFS_IFLUSH_ASYNC                4
 460 #define XFS_IFLUSH_DELWRI               5
 461
 462 /*
 463  * Flags for xfs_itruncate_start().
 464  */
 465 #define XFS_ITRUNC_DEFINITE     0x1
 466 #define XFS_ITRUNC_MAYBE        0x2
 467
 468 #define XFS_ITOV(ip)            ((ip)->i_vnode)
 469 #define XFS_ITOV_NULL(ip)       ((ip)->i_vnode)
 470
 471 /*
 472  * For multiple groups support: if S_ISGID bit is set in the parent
 473  * directory, group of new file is set to that of the parent, and
 474  * new subdirectory gets S_ISGID bit from parent.
 475  */
 476 #define XFS_INHERIT_GID(pip, vfsp)      \
 477         (((vfsp)->vfs_flag & VFS_GRPID) || ((pip)->i_d.di_mode & S_ISGID))
 478
 479 /*
 480  * Flags for xfs_iget()
 481  */
 482 #define XFS_IGET_CREATE         0x1
 483 #define XFS_IGET_BULKSTAT       0x2
 484
 485 /*
 486  * xfs_iget.c prototypes.
 487  */
 488 void            xfs_ihash_init(struct xfs_mount *);
 489 void            xfs_ihash_free(struct xfs_mount *);
 490 xfs_inode_t     *xfs_inode_incore(struct xfs_mount *, xfs_ino_t,
 491                                   struct xfs_trans *);
 492 void            xfs_inode_lock_init(xfs_inode_t *, struct bhv_vnode *);
 493 int             xfs_iget(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
 494                          uint, uint, xfs_inode_t **, xfs_daddr_t);
 495 void            xfs_iput(xfs_inode_t *, uint);
 496 void            xfs_iput_new(xfs_inode_t *, uint);
 497 void            xfs_ilock(xfs_inode_t *, uint);
 498 int             xfs_ilock_nowait(xfs_inode_t *, uint);
 499 void            xfs_iunlock(xfs_inode_t *, uint);
 500 void            xfs_ilock_demote(xfs_inode_t *, uint);
 501 void            xfs_iflock(xfs_inode_t *);
 502 int             xfs_iflock_nowait(xfs_inode_t *);
 503 uint            xfs_ilock_map_shared(xfs_inode_t *);
 504 void            xfs_iunlock_map_shared(xfs_inode_t *, uint);
 505 void            xfs_ifunlock(xfs_inode_t *);
 506 void            xfs_ireclaim(xfs_inode_t *);
 507 int             xfs_finish_reclaim(xfs_inode_t *, int, int);
 508 int             xfs_finish_reclaim_all(struct xfs_mount *, int);
 509
 510 /*
 511  * xfs_inode.c prototypes.
 512  */
 513 int             xfs_itobp(struct xfs_mount *, struct xfs_trans *,
 514                           xfs_inode_t *, struct xfs_dinode **, struct xfs_buf **,
 515                           xfs_daddr_t, uint);
 516 int             xfs_iread(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
 517                           xfs_inode_t **, xfs_daddr_t, uint);
 518 int             xfs_iread_extents(struct xfs_trans *, xfs_inode_t *, int);
 519 int             xfs_ialloc(struct xfs_trans *, xfs_inode_t *, mode_t,
 520                            xfs_nlink_t, xfs_dev_t, struct cred *, xfs_prid_t,
 521                            int, struct xfs_buf **, boolean_t *, xfs_inode_t **);
 522 void            xfs_dinode_from_disk(struct xfs_icdinode *,
 523                                      struct xfs_dinode_core *);
 524 void            xfs_dinode_to_disk(struct xfs_dinode_core *,
 525                                    struct xfs_icdinode *);
 526
 527 uint            xfs_ip2xflags(struct xfs_inode *);
 528 uint            xfs_dic2xflags(struct xfs_dinode_core *);
 529 int             xfs_ifree(struct xfs_trans *, xfs_inode_t *,
 530                            struct xfs_bmap_free *);
 531 int             xfs_itruncate_start(xfs_inode_t *, uint, xfs_fsize_t);
 532 int             xfs_itruncate_finish(struct xfs_trans **, xfs_inode_t *,
 533                                      xfs_fsize_t, int, int);
 534 int             xfs_iunlink(struct xfs_trans *, xfs_inode_t *);
 535 int             xfs_igrow_start(xfs_inode_t *, xfs_fsize_t, struct cred *);
 536 void            xfs_igrow_finish(struct xfs_trans *, xfs_inode_t *,
 537                                  xfs_fsize_t, int);
 538
 539 void            xfs_idestroy_fork(xfs_inode_t *, int);
 540 void            xfs_idestroy(xfs_inode_t *);
 541 void            xfs_idata_realloc(xfs_inode_t *, int, int);
 542 void            xfs_iextract(xfs_inode_t *);
 543 void            xfs_iext_realloc(xfs_inode_t *, int, int);
 544 void            xfs_iroot_realloc(xfs_inode_t *, int, int);
 545 void            xfs_ipin(xfs_inode_t *);
 546 void            xfs_iunpin(xfs_inode_t *);
 547 int             xfs_iextents_copy(xfs_inode_t *, xfs_bmbt_rec_t *, int);
 548 int             xfs_iflush(xfs_inode_t *, uint);
 549 void            xfs_iflush_all(struct xfs_mount *);
 550 int             xfs_iaccess(xfs_inode_t *, mode_t, cred_t *);
 551 uint            xfs_iroundup(uint);
 552 void            xfs_ichgtime(xfs_inode_t *, int);
 553 xfs_fsize_t     xfs_file_last_byte(xfs_inode_t *);
 554 void            xfs_lock_inodes(xfs_inode_t **, int, int, uint);
 555
 556 void            xfs_synchronize_atime(xfs_inode_t *);
 557
 558 xfs_bmbt_rec_host_t *xfs_iext_get_ext(xfs_ifork_t *, xfs_extnum_t);
 559 void            xfs_iext_insert(xfs_ifork_t *, xfs_extnum_t, xfs_extnum_t,
 560                                 xfs_bmbt_irec_t *);
 561 void            xfs_iext_add(xfs_ifork_t *, xfs_extnum_t, int);
 562 void            xfs_iext_add_indirect_multi(xfs_ifork_t *, int, xfs_extnum_t, int);
 563 void            xfs_iext_remove(xfs_ifork_t *, xfs_extnum_t, int);
 564 void            xfs_iext_remove_inline(xfs_ifork_t *, xfs_extnum_t, int);
 565 void            xfs_iext_remove_direct(xfs_ifork_t *, xfs_extnum_t, int);
 566 void            xfs_iext_remove_indirect(xfs_ifork_t *, xfs_extnum_t, int);
 567 void            xfs_iext_realloc_direct(xfs_ifork_t *, int);
 568 void            xfs_iext_realloc_indirect(xfs_ifork_t *, int);
 569 void            xfs_iext_indirect_to_direct(xfs_ifork_t *);
 570 void            xfs_iext_direct_to_inline(xfs_ifork_t *, xfs_extnum_t);
 571 void            xfs_iext_inline_to_direct(xfs_ifork_t *, int);
 572 void            xfs_iext_destroy(xfs_ifork_t *);
 573 xfs_bmbt_rec_host_t *xfs_iext_bno_to_ext(xfs_ifork_t *, xfs_fileoff_t, int *);
 574 xfs_ext_irec_t  *xfs_iext_bno_to_irec(xfs_ifork_t *, xfs_fileoff_t, int *);
 575 xfs_ext_irec_t  *xfs_iext_idx_to_irec(xfs_ifork_t *, xfs_extnum_t *, int *, int);
 576 void            xfs_iext_irec_init(xfs_ifork_t *);
 577 xfs_ext_irec_t *xfs_iext_irec_new(xfs_ifork_t *, int);
 578 void            xfs_iext_irec_remove(xfs_ifork_t *, int);
 579 void            xfs_iext_irec_compact(xfs_ifork_t *);
 580 void            xfs_iext_irec_compact_pages(xfs_ifork_t *);
 581 void            xfs_iext_irec_compact_full(xfs_ifork_t *);
 582 void            xfs_iext_irec_update_extoffs(xfs_ifork_t *, int, int);
 583
 584 #define xfs_ipincount(ip)       ((unsigned int) atomic_read(&ip->i_pincount))
 585
 586 #ifdef DEBUG
 587 void            xfs_isize_check(struct xfs_mount *, xfs_inode_t *, xfs_fsize_t);
 588 #else   /* DEBUG */
 589 #define xfs_isize_check(mp, ip, isize)
 590 #endif  /* DEBUG */
 591
 592 #if defined(DEBUG)
 593 void            xfs_inobp_check(struct xfs_mount *, struct xfs_buf *);
 594 #else
 595 #define xfs_inobp_check(mp, bp)
 596 #endif /* DEBUG */
 597
 598 extern struct kmem_zone *xfs_icluster_zone;
 599 extern struct kmem_zone *xfs_ifork_zone;
 600 extern struct kmem_zone *xfs_inode_zone;
 601 extern struct kmem_zone *xfs_ili_zone;
 602
 603 #endif  /* __KERNEL__ */
 604
 605 #endif  /* __XFS_INODE_H__ */