include/xfs_inode.h

   1 /*
   2  * Copyright (c) 2000 Silicon Graphics, Inc.  All Rights Reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of version 2 of the GNU General Public License as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it would be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  11  *
  12  * Further, this software is distributed without any warranty that it is
  13  * free of the rightful claim of any third person regarding infringement
  14  * or the like.  Any license provided herein, whether implied or
  15  * otherwise, applies only to this software file.  Patent licenses, if
  16  * any, provided herein do not apply to combinations of this program with
  17  * other software, or any other product whatsoever.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write the Free Software Foundation, Inc., 59
  21  * Temple Place - Suite 330, Boston MA 02111-1307, USA.
  22  *
  23  * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
  24  * Mountain View, CA  94043, or:
  25  *
  26  * http://www.sgi.com
  27  *
  28  * For further information regarding this notice, see:
  29  *
  30  * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
  31  */
  32 #ifndef __XFS_INODE_H__
  33 #define __XFS_INODE_H__
  34
  35 /*
  36  * File incore extent information, present for each of data & attr forks.
  37  */
  38 #define XFS_INLINE_EXTS 2
  39 #define XFS_INLINE_DATA 32
  40 typedef struct xfs_ifork {
  41         int                     if_bytes;       /* bytes in if_u1 */
  42         int                     if_real_bytes;  /* bytes allocated in if_u1 */
  43         xfs_bmbt_block_t        *if_broot;      /* file's incore btree root */
  44         short                   if_broot_bytes; /* bytes allocated for root */
  45         unsigned char           if_flags;       /* per-fork flags */
  46         unsigned char           if_ext_max;     /* max # of extent records */
  47         xfs_extnum_t            if_lastex;      /* last if_extents used */
  48         union {
  49                 xfs_bmbt_rec_t  *if_extents;    /* linear map file exts */
  50                 char            *if_data;       /* inline file data */
  51         } if_u1;
  52         union {
  53                 xfs_bmbt_rec_t  if_inline_ext[XFS_INLINE_EXTS];
  54                                                 /* very small file extents */
  55                 char            if_inline_data[XFS_INLINE_DATA];
  56                                                 /* very small file data */
  57                 xfs_dev_t       if_rdev;        /* dev number if special */
  58                 uuid_t          if_uuid;        /* mount point value */
  59         } if_u2;
  60 } xfs_ifork_t;
  61
  62 /*
  63  * Flags for xfs_ichgtime().
  64  */
  65 #define XFS_ICHGTIME_MOD        0x1     /* data fork modification timestamp */
  66 #define XFS_ICHGTIME_ACC        0x2     /* data fork access timestamp */
  67 #define XFS_ICHGTIME_CHG        0x4     /* inode field change timestamp */
  68
  69 /*
  70  * Per-fork incore inode flags.
  71  */
  72 #define XFS_IFINLINE    0x0001  /* Inline data is read in */
  73 #define XFS_IFEXTENTS   0x0002  /* All extent pointers are read in */
  74 #define XFS_IFBROOT     0x0004  /* i_broot points to the bmap b-tree root */
  75
  76 /*
  77  * Flags for xfs_imap() and xfs_dilocate().
  78  */
  79 #define XFS_IMAP_LOOKUP         0x1
  80
  81 /*
  82  * Maximum number of extent pointers in if_u1.if_extents.
  83  */
  84 #define XFS_MAX_INCORE_EXTENTS  32768
  85
  86
  87 #ifdef __KERNEL__
  88 struct bhv_desc;
  89 struct cred;
  90 struct ktrace;
  91 struct vnode;
  92 struct xfs_buf;
  93 struct xfs_bmap_free;
  94 struct xfs_bmbt_irec;
  95 struct xfs_bmbt_block;
  96 struct xfs_ext_attr;
  97 struct xfs_inode;
  98 struct xfs_inode_log_item;
  99 struct xfs_mount;
 100 struct xfs_trans;
 101 struct xfs_dquot;
 102 struct pm;
 103
 104
 105 /*
 106  * This structure is used to communicate which extents of a file
 107  * were holes when a write started from xfs_write_file() to
 108  * xfs_strat_read().  This is necessary so that we can know which
 109  * blocks need to be zeroed when they are read in in xfs_strat_read()
 110  * if they weren\'t allocated when the buffer given to xfs_strat_read()
 111  * was mapped.
 112  *
 113  * We keep a list of these attached to the inode.  The list is
 114  * protected by the inode lock and the fact that the io lock is
 115  * held exclusively by writers.
 116  */
 117 typedef struct xfs_gap {
 118         struct xfs_gap  *xg_next;
 119         xfs_fileoff_t   xg_offset_fsb;
 120         xfs_extlen_t    xg_count_fsb;
 121 } xfs_gap_t;
 122
 123 /*
 124  * This structure is used to hold common pieces of the buffer
 125  * and file for xfs_dio_write and xfs_dio_read.
 126  */
 127 typedef struct xfs_dio {
 128         struct xfs_buf  *xd_bp;
 129         bhv_desc_t      *xd_bdp;
 130         struct xfs_inode *xd_ip;
 131         struct xfs_iocore *xd_io;
 132         struct cred     *xd_cr;
 133         struct pm       *xd_pmp;
 134         int             xd_blkalgn;
 135         int             xd_ioflag;
 136         xfs_off_t       xd_start;
 137         size_t          xd_length;
 138 } xfs_dio_t;
 139
 140
 141 typedef struct xfs_iocore {
 142         void                    *io_obj;        /* pointer to container
 143                                                  * inode or dcxvn structure */
 144         struct xfs_mount        *io_mount;      /* fs mount struct ptr */
 145         mrlock_t                *io_lock;       /* inode lock */
 146         mrlock_t                *io_iolock;     /* inode IO lock */
 147         sema_t                  *io_flock;      /* inode flush lock */
 148         mutex_t                 io_rlock;       /* inode readahead mutex */
 149
 150         /* I/O state */
 151         xfs_off_t               io_offset;      /* last buf offset */
 152         xfs_off_t               io_next_offset; /* seq read detector */
 153         unsigned int            io_last_req_sz; /* last read size */
 154         unsigned int            io_size;        /* file io buffer len */
 155         xfs_fsize_t             io_new_size;    /* sz when write completes */
 156         xfs_off_t               io_write_offset;
 157                                                 /* start off of curr write */
 158         xfs_fileoff_t           io_reada_blkno; /* next blk to start ra */
 159         xfs_gap_t               *io_gap_list;   /* hole list in write range */
 160         unsigned int            io_readio_blocks;       /* read buffer size */
 161         unsigned int            io_writeio_blocks;      /* write buffer size */
 162         uchar_t                 io_readio_log;  /* log2 of read buffer size */
 163         uchar_t                 io_writeio_log; /* log2 of write buffer size */
 164         uchar_t                 io_max_io_log;  /* max r/w io value */
 165         int                     io_queued_bufs; /* count of xfsd queued bufs*/
 166
 167         /* Miscellaneous state. */
 168         unsigned int            io_flags;       /* IO related flags */
 169
 170         /* DMAPI state */
 171         __uint32_t      io_dmevmask;    /* DMIG event mask */
 172         __uint16_t      io_dmstate;     /* DMIG state info */
 173 } xfs_iocore_t;
 174
 175 #define XFS_IO_INODE(io)        ((xfs_inode_t *) ((io)->io_obj))
 176 #define XFS_IO_DCXVN(io)        ((dcxvn_t *) ((io)->io_obj))
 177
 178 /*
 179  * Flags in the flags field
 180  */
 181
 182 #define XFS_IOCORE_ISXFS        0x01
 183 #define XFS_IOCORE_ISCXFS       0x02
 184 #define XFS_IOCORE_RT           0x04
 185 #define XFS_IOCORE_UIOSZ        0x08
 186
 187 #define IO_IS_XFS(io)   ((io)->io_flags & XFS_IOCORE_ISXFS)
 188
 189 /*
 190  * Clear out the read-ahead state in the in-core inode.
 191  * We actually only need to clear i_next_offset and
 192  * i_last_req_sz to get the effect of making all the
 193  * read ahead state unusable.
 194  */
 195 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_INODE_CLEAR_READ_AHEAD)
 196 void xfs_inode_clear_read_ahead(xfs_iocore_t *io);
 197 #define XFS_INODE_CLEAR_READ_AHEAD(io)          xfs_inode_clear_read_ahead(io)
 198 #else
 199 #define XFS_INODE_CLEAR_READ_AHEAD(io)  {       \
 200                 mutex_lock(&((io)->io_rlock), PINOD);    \
 201                 (io)->io_next_offset = 0;          \
 202                 (io)->io_last_req_sz = 0;          \
 203                 mutex_unlock(&((io)->io_rlock)); }
 204 #endif
 205
 206
 207 /*
 208  * xfs_iocore prototypes
 209  */
 210
 211 extern void xfs_iocore_inode_init(struct xfs_inode *);
 212 extern void xfs_iocore_inode_reinit(struct xfs_inode *);
 213 extern void xfs_iocore_reset(xfs_iocore_t *);
 214 extern void xfs_iocore_destroy(xfs_iocore_t *);
 215
 216
 217 /*
 218  * This is the type used in the xfs inode hash table.
 219  * An array of these is allocated for each mounted
 220  * file system to hash the inodes for that file system.
 221  */
 222 typedef struct xfs_ihash {
 223         struct xfs_inode        *ih_next;
 224         mrlock_t                ih_lock;
 225         uint                    ih_version;
 226 } xfs_ihash_t;
 227 #if defined(MP)
 228 #pragma set type attribute xfs_ihash align=128
 229 #endif
 230
 231 /*
 232  * Inode hashing and hash bucket locking.
 233  */
 234 #define XFS_BUCKETS(mp) (37*(mp)->m_sb.sb_agcount-1)
 235 #define XFS_IHASH(mp,ino) ((mp)->m_ihash + (((uint)ino) % (mp)->m_ihsize))
 236
 237 /*
 238  * This is the xfs inode cluster hash.  This hash is used by xfs_iflush to
 239  * find inodes that share a cluster and can be flushed to disk at the same
 240  * time.
 241  */
 242
 243 typedef struct xfs_chashlist {
 244         struct xfs_chashlist    *chl_next;
 245         struct xfs_inode        *chl_ip;
 246         xfs_daddr_t             chl_blkno;      /* starting block number of
 247                                                  * the cluster */
 248 #ifdef DEBUG
 249         struct xfs_buf          *chl_buf;       /* debug: the inode buffer */
 250 #endif
 251 } xfs_chashlist_t;
 252
 253 typedef struct xfs_chash {
 254         xfs_chashlist_t         *ch_list;
 255         lock_t                  ch_lock;
 256 } xfs_chash_t;
 257
 258
 259 /*
 260  * This is the xfs in-core inode structure.
 261  * Most of the on-disk inode is embedded in the i_d field.
 262  *
 263  * The extent pointers/inline file space, however, are managed
 264  * separately.  The memory for this information is pointed to by
 265  * the if_u1 unions depending on the type of the data.
 266  * This is used to linearize the array of extents for fast in-core
 267  * access.  This is used until the file's number of extents
 268  * surpasses XFS_MAX_INCORE_EXTENTS, at which point all extent pointers
 269  * are accessed through the buffer cache.
 270  *
 271  * Other state kept in the in-core inode is used for identification,
 272  * locking, transactional updating, etc of the inode.
 273  *
 274  * Generally, we do not want to hold the i_rlock while holding the
 275  * i_ilock. Hierarchy is i_iolock followed by i_rlock.
 276  *
 277  * xfs_iptr_t contains all the inode fields upto and including the
 278  * i_mnext and i_mprev fields, it is used as a marker in the inode
 279  * chain off the mount structure by xfs_sync calls.
 280  */
 281
 282 typedef struct {
 283         struct xfs_ihash        *ip_hash;       /* pointer to hash header */
 284         struct xfs_inode        *ip_next;       /* inode hash link forw */
 285         struct xfs_inode        *ip_mnext;      /* next inode in mount list */
 286         struct xfs_inode        *ip_mprev;      /* ptr to prev inode */
 287         struct xfs_inode        **ip_prevp;     /* ptr to prev i_next */
 288         struct xfs_mount        *ip_mount;      /* fs mount struct ptr */
 289 } xfs_iptr_t;
 290
 291 typedef struct xfs_inode {
 292         /* Inode linking and identification information. */
 293         struct xfs_ihash        *i_hash;        /* pointer to hash header */
 294         struct xfs_inode        *i_next;        /* inode hash link forw */
 295         struct xfs_inode        *i_mnext;       /* next inode in mount list */
 296         struct xfs_inode        *i_mprev;       /* ptr to prev inode */
 297         struct xfs_inode        **i_prevp;      /* ptr to prev i_next */
 298         struct xfs_mount        *i_mount;       /* fs mount struct ptr */
 299         struct bhv_desc         i_bhv_desc;     /* inode behavior descriptor*/
 300         struct xfs_dquot        *i_udquot;      /* user dquot */
 301         struct xfs_dquot        *i_gdquot;      /* group dquot */
 302
 303         /* Inode location stuff */
 304         xfs_ino_t               i_ino;          /* inode number (agno/agino)*/
 305         xfs_daddr_t             i_blkno;        /* blkno of inode buffer */
 306         dev_t                   i_dev;          /* dev for this inode */
 307         ushort                  i_len;          /* len of inode buffer */
 308         ushort                  i_boffset;      /* off of inode in buffer */
 309
 310         /* Extent information. */
 311         xfs_ifork_t             *i_afp;         /* attribute fork pointer */
 312         xfs_ifork_t             i_df;           /* data fork */
 313
 314         /* Transaction and locking information. */
 315         struct xfs_trans        *i_transp;      /* ptr to owning transaction*/
 316         struct xfs_inode_log_item *i_itemp;     /* logging information */
 317         mrlock_t                i_lock;         /* inode lock */
 318         mrlock_t                i_iolock;       /* inode IO lock */
 319         sema_t                  i_flock;        /* inode flush lock */
 320         unsigned int            i_pincount;     /* inode pin count */
 321         sv_t                    i_pinsema;      /* inode pin sema */
 322         lock_t                  i_ipinlock;     /* inode pinning mutex */
 323         struct xfs_inode        **i_refcache;   /* ptr to entry in ref cache */
 324         struct xfs_inode        *i_release;     /* inode to unref */
 325
 326         /* I/O state */
 327         xfs_iocore_t            i_iocore;       /* I/O core */
 328
 329         /* Miscellaneous state. */
 330         unsigned short          i_flags;        /* see defined flags below */
 331         unsigned short          i_update_core;  /* timestamps/size is dirty */
 332         unsigned short          i_update_size;  /* di_size field is dirty */
 333         unsigned int            i_gen;          /* generation count */
 334         unsigned int            i_delayed_blks; /* count of delay alloc blks */
 335         struct xfs_ext_attr     *i_ext_attr;    /* Critical ext attributes */
 336         void                    *i_ilock_ra;    /* current ilock ret addr */
 337
 338         xfs_dinode_core_t       i_d;            /* most of ondisk inode */
 339         xfs_chashlist_t         *i_chash;       /* cluster hash list header */
 340         struct xfs_inode        *i_cnext;       /* cluster hash link forward */
 341         struct xfs_inode        *i_cprev;       /* cluster hash link backward */
 342
 343 #ifdef DEBUG
 344         /* Trace buffers per inode. */
 345         struct ktrace           *i_xtrace;      /* inode extent list trace */
 346         struct ktrace           *i_btrace;      /* inode bmap btree trace */
 347         struct ktrace           *i_rwtrace;     /* inode read/write trace */
 348         struct ktrace           *i_strat_trace; /* inode strat_write trace */
 349         struct ktrace           *i_lock_trace;  /* inode lock/unlock trace */
 350         struct ktrace           *i_dir_trace;   /* inode directory trace */
 351 #endif /* DEBUG */
 352 } xfs_inode_t;
 353
 354 #endif  /* __KERNEL__ */
 355
 356
 357 /*
 358  * Fork handling.
 359  */
 360 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_IFORK_PTR)
 361 xfs_ifork_t *xfs_ifork_ptr(xfs_inode_t *ip, int w);
 362 #define XFS_IFORK_PTR(ip,w)             xfs_ifork_ptr(ip,w)
 363 #else
 364 #define XFS_IFORK_PTR(ip,w)   ((w) == XFS_DATA_FORK ? &(ip)->i_df : (ip)->i_afp)
 365 #endif
 366 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_IFORK_Q)
 367 int xfs_ifork_q(xfs_inode_t *ip);
 368 #define XFS_IFORK_Q(ip)                 xfs_ifork_q(ip)
 369 #else
 370 #define XFS_IFORK_Q(ip)                 XFS_CFORK_Q(&(ip)->i_d)
 371 #endif
 372 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_IFORK_DSIZE)
 373 int xfs_ifork_dsize(xfs_inode_t *ip);
 374 #define XFS_IFORK_DSIZE(ip)             xfs_ifork_dsize(ip)
 375 #else
 376 #define XFS_IFORK_DSIZE(ip)             XFS_CFORK_DSIZE(&ip->i_d, ip->i_mount)
 377 #endif
 378 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_IFORK_ASIZE)
 379 int xfs_ifork_asize(xfs_inode_t *ip);
 380 #define XFS_IFORK_ASIZE(ip)             xfs_ifork_asize(ip)
 381 #else
 382 #define XFS_IFORK_ASIZE(ip)             XFS_CFORK_ASIZE(&ip->i_d, ip->i_mount)
 383 #endif
 384 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_IFORK_SIZE)
 385 int xfs_ifork_size(xfs_inode_t *ip, int w);
 386 #define XFS_IFORK_SIZE(ip,w)            xfs_ifork_size(ip,w)
 387 #else
 388 #define XFS_IFORK_SIZE(ip,w)            XFS_CFORK_SIZE(&ip->i_d, ip->i_mount, w)
 389 #endif
 390 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_IFORK_FORMAT)
 391 int xfs_ifork_format(xfs_inode_t *ip, int w);
 392 #define XFS_IFORK_FORMAT(ip,w)          xfs_ifork_format(ip,w)
 393 #else
 394 #define XFS_IFORK_FORMAT(ip,w)          XFS_CFORK_FORMAT(&ip->i_d, w)
 395 #endif
 396 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_IFORK_FMT_SET)
 397 void xfs_ifork_fmt_set(xfs_inode_t *ip, int w, int n);
 398 #define XFS_IFORK_FMT_SET(ip,w,n)       xfs_ifork_fmt_set(ip,w,n)
 399 #else
 400 #define XFS_IFORK_FMT_SET(ip,w,n)       XFS_CFORK_FMT_SET(&ip->i_d, w, n)
 401 #endif
 402 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_IFORK_NEXTENTS)
 403 int xfs_ifork_nextents(xfs_inode_t *ip, int w);
 404 #define XFS_IFORK_NEXTENTS(ip,w)        xfs_ifork_nextents(ip,w)
 405 #else
 406 #define XFS_IFORK_NEXTENTS(ip,w)        XFS_CFORK_NEXTENTS(&ip->i_d, w)
 407 #endif
 408 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_IFORK_NEXT_SET)
 409 void xfs_ifork_next_set(xfs_inode_t *ip, int w, int n);
 410 #define XFS_IFORK_NEXT_SET(ip,w,n)      xfs_ifork_next_set(ip,w,n)
 411 #else
 412 #define XFS_IFORK_NEXT_SET(ip,w,n)      XFS_CFORK_NEXT_SET(&ip->i_d, w, n)
 413 #endif
 414
 415
 416 #ifdef __KERNEL__
 417
 418 /*
 419  * In-core inode flags.
 420  */
 421 #define XFS_IGRIO       0x0001  /* inode used for guaranteed rate i/o */
 422 #define XFS_IUIOSZ      0x0002  /* inode i/o sizes have been explicitly set */
 423 #define XFS_IQUIESCE    0x0004  /* we have started quiescing for this inode */
 424 #define XFS_IRECLAIM    0x0008  /* we have started reclaiming this inode    */
 425
 426 /*
 427  * Flags for inode locking.
 428  */
 429 #define XFS_IOLOCK_EXCL         0x001
 430 #define XFS_IOLOCK_SHARED       0x002
 431 #define XFS_ILOCK_EXCL          0x004
 432 #define XFS_ILOCK_SHARED        0x008
 433 #define XFS_IUNLOCK_NONOTIFY    0x010
 434 #define XFS_IOLOCK_NESTED       0x020
 435 #define XFS_EXTENT_TOKEN_RD     0x040
 436 #define XFS_SIZE_TOKEN_RD       0x080
 437 #define XFS_EXTSIZE_RD          (XFS_EXTENT_TOKEN_RD|XFS_SIZE_TOKEN_RD)
 438 #define XFS_WILLLEND            0x100   /* Always acquire tokens for lending */
 439 #define XFS_EXTENT_TOKEN_WR     (XFS_EXTENT_TOKEN_RD | XFS_WILLLEND)
 440 #define XFS_SIZE_TOKEN_WR       (XFS_SIZE_TOKEN_RD | XFS_WILLLEND)
 441 #define XFS_EXTSIZE_WR          (XFS_EXTSIZE_RD | XFS_WILLLEND)
 442
 443
 444 #define XFS_LOCK_MASK   \
 445         (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED | XFS_ILOCK_EXCL | \
 446          XFS_IOLOCK_NESTED | \
 447          XFS_ILOCK_SHARED | XFS_EXTENT_TOKEN_RD | XFS_SIZE_TOKEN_RD | \
 448          XFS_WILLLEND)
 449
 450 /*
 451  * Flags for xfs_iflush()
 452  */
 453 #define XFS_IFLUSH_DELWRI_ELSE_SYNC     1
 454 #define XFS_IFLUSH_DELWRI_ELSE_ASYNC    2
 455 #define XFS_IFLUSH_SYNC                 3
 456 #define XFS_IFLUSH_ASYNC                4
 457 #define XFS_IFLUSH_DELWRI               5
 458
 459 /*
 460  * Flags for xfs_iflush_all.
 461  */
 462 #define XFS_FLUSH_ALL           0x1
 463
 464 /*
 465  * Flags for xfs_itruncate_start().
 466  */
 467 #define XFS_ITRUNC_DEFINITE     0x1
 468 #define XFS_ITRUNC_MAYBE        0x2
 469
 470 /*
 471  * Maximum file size.
 472  * if XFS_BIG_FILES 2^63 - 1 (largest positive value of xfs_fsize_t)
 473  * else 2^40 - 1 (40=31+9) (might be an int holding a block #)
 474  * Note, we allow seeks to this offset, although you can't read or write.
 475  * For the not XFS_BIG_FILES case, the value could be 1 higher but we don't
 476  * do that, for symmetry.
 477  */
 478 #if XFS_BIG_FILES
 479 #define XFS_MAX_FILE_OFFSET     ((long long)((1ULL<<63)-1ULL))
 480 #else
 481 #define XFS_MAX_FILE_OFFSET     ((1LL<<40)-1LL)
 482 #endif
 483
 484 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_ITOV)
 485 struct vnode *xfs_itov(xfs_inode_t *ip);
 486 #define XFS_ITOV(ip)            xfs_itov(ip)
 487 #else
 488 #define XFS_ITOV(ip)            BHV_TO_VNODE(XFS_ITOBHV(ip))
 489 #endif
 490 #define XFS_ITOV_NULL(ip)       BHV_TO_VNODE_NULL(XFS_ITOBHV(ip))
 491 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_ITOBHV)
 492 struct bhv_desc *xfs_itobhv(xfs_inode_t *ip);
 493 #define XFS_ITOBHV(ip)          xfs_itobhv(ip)
 494 #else
 495 #define XFS_ITOBHV(ip)          ((struct bhv_desc *)(&((ip)->i_bhv_desc)))
 496 #endif
 497 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BHVTOI)
 498 xfs_inode_t *xfs_bhvtoi(struct bhv_desc *bhvp);
 499 #define XFS_BHVTOI(bhvp)        xfs_bhvtoi(bhvp)
 500 #else
 501 #define XFS_BHVTOI(bhvp)        \
 502         ((xfs_inode_t *)((char *)(bhvp) - \
 503                          (char *)&(((xfs_inode_t *)0)->i_bhv_desc)))
 504 #endif
 505
 506 #define BHV_IS_XFS(bdp)         (BHV_OPS(bdp) == &xfs_vnodeops)
 507
 508 /*
 509  * Pick the inode cluster hash bucket
 510  * (m_chash is the same size as m_ihash)
 511  */
 512 #define XFS_CHASH(mp,blk) ((mp)->m_chash + (((uint)blk) % (mp)->m_chsize))
 513
 514
 515 /*
 516  * xfs_iget.c prototypes.
 517  */
 518 void            xfs_ihash_init(struct xfs_mount *);
 519 void            xfs_ihash_free(struct xfs_mount *);
 520 void            xfs_chash_init(struct xfs_mount *);
 521 void            xfs_chash_free(struct xfs_mount *);
 522 xfs_inode_t     *xfs_inode_incore(struct xfs_mount *, xfs_ino_t,
 523                                   struct xfs_trans *);
 524 void            xfs_inode_lock_init(xfs_inode_t *, struct vnode *);
 525 int             xfs_iget(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
 526                          uint, xfs_inode_t **, xfs_daddr_t);
 527 int             xfs_vn_iget(struct vnode    *, struct xfs_mount *,
 528                          struct xfs_trans *, xfs_ino_t,
 529                          uint, xfs_inode_t **, xfs_daddr_t);
 530 void            xfs_iput(xfs_inode_t *, uint);
 531 void            xfs_ilock(xfs_inode_t *, uint);
 532 int             xfs_ilock_nowait(xfs_inode_t *, uint);
 533 void            xfs_iunlock(xfs_inode_t *, uint);
 534 void            xfs_ilock_demote(xfs_inode_t *, uint);
 535 void            xfs_iflock(xfs_inode_t *);
 536 int             xfs_iflock_nowait(xfs_inode_t *);
 537 uint            xfs_ilock_map_shared(xfs_inode_t *);
 538 void            xfs_iunlock_map_shared(xfs_inode_t *, uint);
 539 void            xfs_ifunlock(xfs_inode_t *);
 540 void            xfs_ireclaim(xfs_inode_t *);
 541 int             xfs_finish_reclaim(xfs_inode_t *, int);
 542
 543 /*
 544  * xfs_inode.c prototypes.
 545  */
 546 int             xfs_inotobp(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
 547                             xfs_dinode_t **, struct xfs_buf **, int *);
 548 int             xfs_itobp(struct xfs_mount *, struct xfs_trans *,
 549                           xfs_inode_t *, xfs_dinode_t **, struct xfs_buf **,
 550                           xfs_daddr_t);
 551 int             xfs_iread(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
 552                           xfs_inode_t **, xfs_daddr_t);
 553 int             xfs_iread_extents(struct xfs_trans *, xfs_inode_t *, int);
 554 int             xfs_ialloc(struct xfs_trans *, xfs_inode_t *, mode_t, nlink_t,
 555                            dev_t, struct cred *, xfs_prid_t, int,
 556                            struct xfs_buf **, boolean_t *, xfs_inode_t **);
 557 void            xfs_xlate_dinode_core(xfs_caddr_t, struct xfs_dinode_core *, int,
 558                            xfs_arch_t);
 559 int             xfs_ifree(struct xfs_trans *, xfs_inode_t *);
 560 int             xfs_atruncate_start(xfs_inode_t *);
 561 void            xfs_itruncate_start(xfs_inode_t *, uint, xfs_fsize_t);
 562 int             xfs_itruncate_finish(struct xfs_trans **, xfs_inode_t *,
 563                                      xfs_fsize_t, int, int);
 564 int             xfs_iunlink(struct xfs_trans *, xfs_inode_t *);
 565 int             xfs_igrow_start(xfs_inode_t *, xfs_fsize_t, struct cred *);
 566 void            xfs_igrow_finish(struct xfs_trans *, xfs_inode_t *,
 567                                  xfs_fsize_t, int);
 568
 569 void            xfs_idestroy_fork(xfs_inode_t *, int);
 570 void            xfs_idestroy(xfs_inode_t *);
 571 void            xfs_idata_realloc(xfs_inode_t *, int, int);
 572 void            xfs_iextract(xfs_inode_t *);
 573 void            xfs_iext_realloc(xfs_inode_t *, int, int);
 574 void            xfs_iroot_realloc(xfs_inode_t *, int, int);
 575 void            xfs_ipin(xfs_inode_t *);
 576 void            xfs_iunpin(xfs_inode_t *);
 577 unsigned int    xfs_ipincount(xfs_inode_t *);
 578 int             xfs_iextents_copy(xfs_inode_t *, xfs_bmbt_rec_32_t *, int);
 579 int             xfs_iflush(xfs_inode_t *, uint);
 580 int             xfs_iflush_all(struct xfs_mount *, int);
 581 int             xfs_ibusy_check(xfs_inode_t *, int);
 582 int             xfs_iaccess(xfs_inode_t *, mode_t, cred_t *);
 583 uint            xfs_iroundup(uint);
 584 void            xfs_ichgtime(xfs_inode_t *, int);
 585 xfs_fsize_t     xfs_file_last_byte(xfs_inode_t *);
 586 xfs_inode_t     *xfs_get_inode(dev_t, xfs_ino_t);
 587 void            xfs_lock_inodes(xfs_inode_t **, int, int, uint);
 588
 589
 590 #ifdef DEBUG
 591 void            xfs_isize_check(struct xfs_mount *, xfs_inode_t *, xfs_fsize_t);
 592 #else   /* DEBUG */
 593 #define xfs_isize_check(mp, ip, isize)
 594 #endif  /* DEBUG */
 595
 596 #if defined(DEBUG)
 597 void            xfs_inobp_check(struct xfs_mount *, struct xfs_buf *);
 598 #else
 599 #define xfs_inobp_check(mp, bp)
 600 #endif /* DEBUG */
 601
 602 extern struct xfs_zone  *xfs_chashlist_zone;
 603 extern struct xfs_zone  *xfs_ifork_zone;
 604 extern struct xfs_zone  *xfs_inode_zone;
 605 extern struct xfs_zone  *xfs_ili_zone;
 606 extern struct vnodeops  xfs_vnodeops;
 607
 608 #ifdef XFS_ILOCK_TRACE
 609 #define XFS_ILOCK_KTRACE_SIZE   32
 610 void    xfs_ilock_trace(xfs_inode_t *ip, int lock, unsigned int lockflags,
 611                         inst_t *ra);
 612 #endif
 613
 614 #endif  /* __KERNEL__ */
 615
 616 #endif  /* __XFS_INODE_H__ */