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 typedef struct xfs_iocore {
 136         void                    *io_obj;        /* pointer to container
 137                                                  * inode or dcxvn structure */
 138         struct xfs_mount        *io_mount;      /* fs mount struct ptr */
 139 #ifdef DEBUG
 140         mrlock_t                *io_lock;       /* inode IO lock */
 141         mrlock_t                *io_iolock;     /* inode IO lock */
 142 #endif
 143
 144         /* I/O state */
 145         xfs_fsize_t             io_new_size;    /* sz when write completes */
 146
 147         /* Miscellaneous state. */
 148         unsigned int            io_flags;       /* IO related flags */
 149
 150         /* DMAPI state */
 151         dm_attrs_t              io_dmattrs;
 152
 153 } xfs_iocore_t;
 154
 155 #define        io_dmevmask     io_dmattrs.da_dmevmask
 156 #define        io_dmstate      io_dmattrs.da_dmstate
 157
 158 #define XFS_IO_INODE(io)        ((xfs_inode_t *) ((io)->io_obj))
 159 #define XFS_IO_DCXVN(io)        ((dcxvn_t *) ((io)->io_obj))
 160
 161 /*
 162  * Flags in the flags field
 163  */
 164
 165 #define XFS_IOCORE_RT           0x1
 166
 167 /*
 168  * xfs_iocore prototypes
 169  */
 170
 171 extern void xfs_iocore_inode_init(struct xfs_inode *);
 172 extern void xfs_iocore_inode_reinit(struct xfs_inode *);
 173
 174 /*
 175  * This is the xfs inode cluster structure.  This structure is used by
 176  * xfs_iflush to find inodes that share a cluster and can be flushed to disk at
 177  * the same time.
 178  */
 179 typedef struct xfs_icluster {
 180         struct hlist_head       icl_inodes;     /* list of inodes on cluster */
 181         xfs_daddr_t             icl_blkno;      /* starting block number of
 182                                                  * the cluster */
 183         struct xfs_buf          *icl_buf;       /* the inode buffer */
 184         lock_t                  icl_lock;       /* inode list lock */
 185 } xfs_icluster_t;
 186
 187 /*
 188  * This is the xfs in-core inode structure.
 189  * Most of the on-disk inode is embedded in the i_d field.
 190  *
 191  * The extent pointers/inline file space, however, are managed
 192  * separately.  The memory for this information is pointed to by
 193  * the if_u1 unions depending on the type of the data.
 194  * This is used to linearize the array of extents for fast in-core
 195  * access.  This is used until the file's number of extents
 196  * surpasses XFS_MAX_INCORE_EXTENTS, at which point all extent pointers
 197  * are accessed through the buffer cache.
 198  *
 199  * Other state kept in the in-core inode is used for identification,
 200  * locking, transactional updating, etc of the inode.
 201  *
 202  * Generally, we do not want to hold the i_rlock while holding the
 203  * i_ilock. Hierarchy is i_iolock followed by i_rlock.
 204  *
 205  * xfs_iptr_t contains all the inode fields upto and including the
 206  * i_mnext and i_mprev fields, it is used as a marker in the inode
 207  * chain off the mount structure by xfs_sync calls.
 208  */
 209
 210 typedef struct xfs_ictimestamp {
 211         __int32_t       t_sec;          /* timestamp seconds */
 212         __int32_t       t_nsec;         /* timestamp nanoseconds */
 213 } xfs_ictimestamp_t;
 214
 215 /*
 216  * NOTE:  This structure must be kept identical to struct xfs_dinode_core
 217  *        in xfs_dinode.h except for the endianess annotations.
 218  */
 219 typedef struct xfs_icdinode {
 220         __uint16_t      di_magic;       /* inode magic # = XFS_DINODE_MAGIC */
 221         __uint16_t      di_mode;        /* mode and type of file */
 222         __int8_t        di_version;     /* inode version */
 223         __int8_t        di_format;      /* format of di_c data */
 224         __uint16_t      di_onlink;      /* old number of links to file */
 225         __uint32_t      di_uid;         /* owner's user id */
 226         __uint32_t      di_gid;         /* owner's group id */
 227         __uint32_t      di_nlink;       /* number of links to file */
 228         __uint16_t      di_projid;      /* owner's project id */
 229         __uint8_t       di_pad[8];      /* unused, zeroed space */
 230         __uint16_t      di_flushiter;   /* incremented on flush */
 231         xfs_ictimestamp_t di_atime;     /* time last accessed */
 232         xfs_ictimestamp_t di_mtime;     /* time last modified */
 233         xfs_ictimestamp_t di_ctime;     /* time created/inode modified */
 234         xfs_fsize_t     di_size;        /* number of bytes in file */
 235         xfs_drfsbno_t   di_nblocks;     /* # of direct & btree blocks used */
 236         xfs_extlen_t    di_extsize;     /* basic/minimum extent size for file */
 237         xfs_extnum_t    di_nextents;    /* number of extents in data fork */
 238         xfs_aextnum_t   di_anextents;   /* number of extents in attribute fork*/
 239         __uint8_t       di_forkoff;     /* attr fork offs, <<3 for 64b align */
 240         __int8_t        di_aformat;     /* format of attr fork's data */
 241         __uint32_t      di_dmevmask;    /* DMIG event mask */
 242         __uint16_t      di_dmstate;     /* DMIG state info */
 243         __uint16_t      di_flags;       /* random flags, XFS_DIFLAG_... */
 244         __uint32_t      di_gen;         /* generation number */
 245 } xfs_icdinode_t;
 246
 247 typedef struct {
 248         struct xfs_inode        *ip_mnext;      /* next inode in mount list */
 249         struct xfs_inode        *ip_mprev;      /* ptr to prev inode */
 250         struct xfs_mount        *ip_mount;      /* fs mount struct ptr */
 251 } xfs_iptr_t;
 252
 253 typedef struct xfs_inode {
 254         /* Inode linking and identification information. */
 255         struct xfs_inode        *i_mnext;       /* next inode in mount list */
 256         struct xfs_inode        *i_mprev;       /* ptr to prev inode */
 257         struct xfs_mount        *i_mount;       /* fs mount struct ptr */
 258         struct list_head        i_reclaim;      /* reclaim list */
 259         bhv_vnode_t             *i_vnode;       /* vnode backpointer */
 260         struct xfs_dquot        *i_udquot;      /* user dquot */
 261         struct xfs_dquot        *i_gdquot;      /* group dquot */
 262
 263         /* Inode location stuff */
 264         xfs_ino_t               i_ino;          /* inode number (agno/agino)*/
 265         xfs_daddr_t             i_blkno;        /* blkno of inode buffer */
 266         ushort                  i_len;          /* len of inode buffer */
 267         ushort                  i_boffset;      /* off of inode in buffer */
 268
 269         /* Extent information. */
 270         xfs_ifork_t             *i_afp;         /* attribute fork pointer */
 271         xfs_ifork_t             i_df;           /* data fork */
 272
 273         /* Transaction and locking information. */
 274         struct xfs_trans        *i_transp;      /* ptr to owning transaction*/
 275         struct xfs_inode_log_item *i_itemp;     /* logging information */
 276         mrlock_t                i_lock;         /* inode lock */
 277         mrlock_t                i_iolock;       /* inode IO lock */
 278         sema_t                  i_flock;        /* inode flush lock */
 279         atomic_t                i_pincount;     /* inode pin count */
 280         wait_queue_head_t       i_ipin_wait;    /* inode pinning wait queue */
 281         spinlock_t              i_flags_lock;   /* inode i_flags lock */
 282 #ifdef HAVE_REFCACHE
 283         struct xfs_inode        **i_refcache;   /* ptr to entry in ref cache */
 284         struct xfs_inode        *i_release;     /* inode to unref */
 285 #endif
 286         /* I/O state */
 287         xfs_iocore_t            i_iocore;       /* I/O core */
 288
 289         /* Miscellaneous state. */
 290         unsigned short          i_flags;        /* see defined flags below */
 291         unsigned char           i_update_core;  /* timestamps/size is dirty */
 292         unsigned char           i_update_size;  /* di_size field is dirty */
 293         unsigned int            i_gen;          /* generation count */
 294         unsigned int            i_delayed_blks; /* count of delay alloc blks */
 295
 296         xfs_icdinode_t          i_d;            /* most of ondisk inode */
 297         xfs_icluster_t          *i_cluster;     /* cluster list header */
 298         struct hlist_node       i_cnode;        /* cluster link node */
 299
 300         xfs_fsize_t             i_size;         /* in-memory size */
 301         atomic_t                i_iocount;      /* outstanding I/O count */
 302         /* Trace buffers per inode. */
 303 #ifdef XFS_VNODE_TRACE
 304         struct ktrace           *i_trace;       /* general inode trace */
 305 #endif
 306 #ifdef XFS_BMAP_TRACE
 307         struct ktrace           *i_xtrace;      /* inode extent list trace */
 308 #endif
 309 #ifdef XFS_BMBT_TRACE
 310         struct ktrace           *i_btrace;      /* inode bmap btree trace */
 311 #endif
 312 #ifdef XFS_RW_TRACE
 313         struct ktrace           *i_rwtrace;     /* inode read/write trace */
 314 #endif
 315 #ifdef XFS_ILOCK_TRACE
 316         struct ktrace           *i_lock_trace;  /* inode lock/unlock trace */
 317 #endif
 318 #ifdef XFS_DIR2_TRACE
 319         struct ktrace           *i_dir_trace;   /* inode directory trace */
 320 #endif
 321 } xfs_inode_t;
 322
 323 #define XFS_ISIZE(ip)   (((ip)->i_d.di_mode & S_IFMT) == S_IFREG) ? \
 324                                 (ip)->i_size : (ip)->i_d.di_size;
 325
 326 /*
 327  * i_flags helper functions
 328  */
 329 static inline void
 330 __xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
 331 {
 332         ip->i_flags |= flags;
 333 }
 334
 335 static inline void
 336 xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
 337 {
 338         spin_lock(&ip->i_flags_lock);
 339         __xfs_iflags_set(ip, flags);
 340         spin_unlock(&ip->i_flags_lock);
 341 }
 342
 343 static inline void
 344 xfs_iflags_clear(xfs_inode_t *ip, unsigned short flags)
 345 {
 346         spin_lock(&ip->i_flags_lock);
 347         ip->i_flags &= ~flags;
 348         spin_unlock(&ip->i_flags_lock);
 349 }
 350
 351 static inline int
 352 __xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
 353 {
 354         return (ip->i_flags & flags);
 355 }
 356
 357 static inline int
 358 xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
 359 {
 360         int ret;
 361         spin_lock(&ip->i_flags_lock);
 362         ret = __xfs_iflags_test(ip, flags);
 363         spin_unlock(&ip->i_flags_lock);
 364         return ret;
 365 }
 366
 367 static inline int
 368 xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned short flags)
 369 {
 370         int ret;
 371
 372         spin_lock(&ip->i_flags_lock);
 373         ret = ip->i_flags & flags;
 374         if (ret)
 375                 ip->i_flags &= ~flags;
 376         spin_unlock(&ip->i_flags_lock);
 377         return ret;
 378 }
 379 #endif  /* __KERNEL__ */
 380
 381
 382 /*
 383  * Fork handling.
 384  */
 385 #define XFS_IFORK_PTR(ip,w)             \
 386         ((w) == XFS_DATA_FORK ? &(ip)->i_df : (ip)->i_afp)
 387 #define XFS_IFORK_Q(ip)                 XFS_CFORK_Q(&(ip)->i_d)
 388 #define XFS_IFORK_DSIZE(ip)             XFS_CFORK_DSIZE(&ip->i_d, ip->i_mount)
 389 #define XFS_IFORK_ASIZE(ip)             XFS_CFORK_ASIZE(&ip->i_d, ip->i_mount)
 390 #define XFS_IFORK_SIZE(ip,w)            XFS_CFORK_SIZE(&ip->i_d, ip->i_mount, w)
 391 #define XFS_IFORK_FORMAT(ip,w)          XFS_CFORK_FORMAT(&ip->i_d, w)
 392 #define XFS_IFORK_FMT_SET(ip,w,n)       XFS_CFORK_FMT_SET(&ip->i_d, w, n)
 393 #define XFS_IFORK_NEXTENTS(ip,w)        XFS_CFORK_NEXTENTS(&ip->i_d, w)
 394 #define XFS_IFORK_NEXT_SET(ip,w,n)      XFS_CFORK_NEXT_SET(&ip->i_d, w, n)
 395
 396
 397 #ifdef __KERNEL__
 398
 399 /*
 400  * In-core inode flags.
 401  */
 402 #define XFS_IGRIO       0x0001  /* inode used for guaranteed rate i/o */
 403 #define XFS_IUIOSZ      0x0002  /* inode i/o sizes have been explicitly set */
 404 #define XFS_IQUIESCE    0x0004  /* we have started quiescing for this inode */
 405 #define XFS_IRECLAIM    0x0008  /* we have started reclaiming this inode    */
 406 #define XFS_ISTALE      0x0010  /* inode has been staled */
 407 #define XFS_IRECLAIMABLE 0x0020 /* inode can be reclaimed */
 408 #define XFS_INEW        0x0040
 409 #define XFS_IFILESTREAM 0x0080  /* inode is in a filestream directory */
 410 #define XFS_IMODIFIED   0x0100  /* XFS inode state possibly differs */
 411                                 /* to the Linux inode state. */
 412 #define XFS_ITRUNCATED  0x0200  /* truncated down so flush-on-close */
 413
 414 /*
 415  * Flags for inode locking.
 416  * Bit ranges:  1<<1  - 1<<16-1 -- iolock/ilock modes (bitfield)
 417  *              1<<16 - 1<<32-1 -- lockdep annotation (integers)
 418  */
 419 #define XFS_IOLOCK_EXCL         (1<<0)
 420 #define XFS_IOLOCK_SHARED       (1<<1)
 421 #define XFS_ILOCK_EXCL          (1<<2)
 422 #define XFS_ILOCK_SHARED        (1<<3)
 423 #define XFS_IUNLOCK_NONOTIFY    (1<<4)
 424 /*      #define XFS_IOLOCK_NESTED       (1<<5)  */
 425 #define XFS_EXTENT_TOKEN_RD     (1<<6)
 426 #define XFS_SIZE_TOKEN_RD       (1<<7)
 427 #define XFS_EXTSIZE_RD          (XFS_EXTENT_TOKEN_RD|XFS_SIZE_TOKEN_RD)
 428 #define XFS_WILLLEND            (1<<8)  /* Always acquire tokens for lending */
 429 #define XFS_EXTENT_TOKEN_WR     (XFS_EXTENT_TOKEN_RD | XFS_WILLLEND)
 430 #define XFS_SIZE_TOKEN_WR       (XFS_SIZE_TOKEN_RD | XFS_WILLLEND)
 431 #define XFS_EXTSIZE_WR          (XFS_EXTSIZE_RD | XFS_WILLLEND)
 432 /* TODO:XFS_SIZE_TOKEN_WANT     (1<<9) */
 433
 434 #define XFS_LOCK_MASK           (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \
 435                                 | XFS_ILOCK_EXCL | XFS_ILOCK_SHARED \
 436                                 | XFS_EXTENT_TOKEN_RD | XFS_SIZE_TOKEN_RD \
 437                                 | XFS_WILLLEND)
 438
 439 /*
 440  * Flags for lockdep annotations.
 441  *
 442  * XFS_I[O]LOCK_PARENT - for operations that require locking two inodes
 443  * (ie directory operations that require locking a directory inode and
 444  * an entry inode).  The first inode gets locked with this flag so it
 445  * gets a lockdep subclass of 1 and the second lock will have a lockdep
 446  * subclass of 0.
 447  *
 448  * XFS_LOCK_INUMORDER - for locking several inodes at the some time
 449  * with xfs_lock_inodes().  This flag is used as the starting subclass
 450  * and each subsequent lock acquired will increment the subclass by one.
 451  * So the first lock acquired will have a lockdep subclass of 2, the
 452  * second lock will have a lockdep subclass of 3, and so on. It is
 453  * the responsibility of the class builder to shift this to the correct
 454  * portion of the lock_mode lockdep mask.
 455  */
 456 #define XFS_LOCK_PARENT         1
 457 #define XFS_LOCK_INUMORDER      2
 458
 459 #define XFS_IOLOCK_SHIFT        16
 460 #define XFS_IOLOCK_PARENT       (XFS_LOCK_PARENT << XFS_IOLOCK_SHIFT)
 461
 462 #define XFS_ILOCK_SHIFT         24
 463 #define XFS_ILOCK_PARENT        (XFS_LOCK_PARENT << XFS_ILOCK_SHIFT)
 464
 465 #define XFS_IOLOCK_DEP_MASK     0x00ff0000
 466 #define XFS_ILOCK_DEP_MASK      0xff000000
 467 #define XFS_LOCK_DEP_MASK       (XFS_IOLOCK_DEP_MASK | XFS_ILOCK_DEP_MASK)
 468
 469 #define XFS_IOLOCK_DEP(flags)   (((flags) & XFS_IOLOCK_DEP_MASK) >> XFS_IOLOCK_SHIFT)
 470 #define XFS_ILOCK_DEP(flags)    (((flags) & XFS_ILOCK_DEP_MASK) >> XFS_ILOCK_SHIFT)
 471
 472 /*
 473  * Flags for xfs_iflush()
 474  */
 475 #define XFS_IFLUSH_DELWRI_ELSE_SYNC     1
 476 #define XFS_IFLUSH_DELWRI_ELSE_ASYNC    2
 477 #define XFS_IFLUSH_SYNC                 3
 478 #define XFS_IFLUSH_ASYNC                4
 479 #define XFS_IFLUSH_DELWRI               5
 480
 481 /*
 482  * Flags for xfs_itruncate_start().
 483  */
 484 #define XFS_ITRUNC_DEFINITE     0x1
 485 #define XFS_ITRUNC_MAYBE        0x2
 486
 487 #define XFS_ITOV(ip)            ((ip)->i_vnode)
 488 #define XFS_ITOV_NULL(ip)       ((ip)->i_vnode)
 489
 490 /*
 491  * For multiple groups support: if S_ISGID bit is set in the parent
 492  * directory, group of new file is set to that of the parent, and
 493  * new subdirectory gets S_ISGID bit from parent.
 494  */
 495 #define XFS_INHERIT_GID(pip)    \
 496         (((pip)->i_mount->m_flags & XFS_MOUNT_GRPID) || \
 497          ((pip)->i_d.di_mode & S_ISGID))
 498
 499 /*
 500  * Flags for xfs_iget()
 501  */
 502 #define XFS_IGET_CREATE         0x1
 503 #define XFS_IGET_BULKSTAT       0x2
 504
 505 /*
 506  * xfs_iget.c prototypes.
 507  */
 508 void            xfs_ihash_init(struct xfs_mount *);
 509 void            xfs_ihash_free(struct xfs_mount *);
 510 xfs_inode_t     *xfs_inode_incore(struct xfs_mount *, xfs_ino_t,
 511                                   struct xfs_trans *);
 512 void            xfs_inode_lock_init(xfs_inode_t *, bhv_vnode_t *);
 513 int             xfs_iget(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
 514                          uint, uint, xfs_inode_t **, xfs_daddr_t);
 515 void            xfs_iput(xfs_inode_t *, uint);
 516 void            xfs_iput_new(xfs_inode_t *, uint);
 517 void            xfs_ilock(xfs_inode_t *, uint);
 518 int             xfs_ilock_nowait(xfs_inode_t *, uint);
 519 void            xfs_iunlock(xfs_inode_t *, uint);
 520 void            xfs_ilock_demote(xfs_inode_t *, uint);
 521 void            xfs_iflock(xfs_inode_t *);
 522 int             xfs_iflock_nowait(xfs_inode_t *);
 523 uint            xfs_ilock_map_shared(xfs_inode_t *);
 524 void            xfs_iunlock_map_shared(xfs_inode_t *, uint);
 525 void            xfs_ifunlock(xfs_inode_t *);
 526 void            xfs_ireclaim(xfs_inode_t *);
 527 int             xfs_finish_reclaim(xfs_inode_t *, int, int);
 528 int             xfs_finish_reclaim_all(struct xfs_mount *, int);
 529
 530 /*
 531  * xfs_inode.c prototypes.
 532  */
 533 int             xfs_itobp(struct xfs_mount *, struct xfs_trans *,
 534                           xfs_inode_t *, struct xfs_dinode **, struct xfs_buf **,
 535                           xfs_daddr_t, uint);
 536 int             xfs_iread(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
 537                           xfs_inode_t **, xfs_daddr_t, uint);
 538 int             xfs_iread_extents(struct xfs_trans *, xfs_inode_t *, int);
 539 int             xfs_ialloc(struct xfs_trans *, xfs_inode_t *, mode_t,
 540                            xfs_nlink_t, xfs_dev_t, struct cred *, xfs_prid_t,
 541                            int, struct xfs_buf **, boolean_t *, xfs_inode_t **);
 542 void            xfs_dinode_from_disk(struct xfs_icdinode *,
 543                                      struct xfs_dinode_core *);
 544 void            xfs_dinode_to_disk(struct xfs_dinode_core *,
 545                                    struct xfs_icdinode *);
 546
 547 uint            xfs_ip2xflags(struct xfs_inode *);
 548 uint            xfs_dic2xflags(struct xfs_dinode_core *);
 549 int             xfs_ifree(struct xfs_trans *, xfs_inode_t *,
 550                            struct xfs_bmap_free *);
 551 int             xfs_itruncate_start(xfs_inode_t *, uint, xfs_fsize_t);
 552 int             xfs_itruncate_finish(struct xfs_trans **, xfs_inode_t *,
 553                                      xfs_fsize_t, int, int);
 554 int             xfs_iunlink(struct xfs_trans *, xfs_inode_t *);
 555 int             xfs_igrow_start(xfs_inode_t *, xfs_fsize_t, struct cred *);
 556 void            xfs_igrow_finish(struct xfs_trans *, xfs_inode_t *,
 557                                  xfs_fsize_t, int);
 558
 559 void            xfs_idestroy_fork(xfs_inode_t *, int);
 560 void            xfs_idestroy(xfs_inode_t *);
 561 void            xfs_idata_realloc(xfs_inode_t *, int, int);
 562 void            xfs_iextract(xfs_inode_t *);
 563 void            xfs_iext_realloc(xfs_inode_t *, int, int);
 564 void            xfs_iroot_realloc(xfs_inode_t *, int, int);
 565 void            xfs_ipin(xfs_inode_t *);
 566 void            xfs_iunpin(xfs_inode_t *);
 567 int             xfs_iextents_copy(xfs_inode_t *, xfs_bmbt_rec_t *, int);
 568 int             xfs_iflush(xfs_inode_t *, uint);
 569 void            xfs_iflush_all(struct xfs_mount *);
 570 int             xfs_iaccess(xfs_inode_t *, mode_t, cred_t *);
 571 uint            xfs_iroundup(uint);
 572 void            xfs_ichgtime(xfs_inode_t *, int);
 573 xfs_fsize_t     xfs_file_last_byte(xfs_inode_t *);
 574 void            xfs_lock_inodes(xfs_inode_t **, int, int, uint);
 575
 576 void            xfs_synchronize_atime(xfs_inode_t *);
 577
 578 xfs_bmbt_rec_host_t *xfs_iext_get_ext(xfs_ifork_t *, xfs_extnum_t);
 579 void            xfs_iext_insert(xfs_ifork_t *, xfs_extnum_t, xfs_extnum_t,
 580                                 xfs_bmbt_irec_t *);
 581 void            xfs_iext_add(xfs_ifork_t *, xfs_extnum_t, int);
 582 void            xfs_iext_add_indirect_multi(xfs_ifork_t *, int, xfs_extnum_t, int);
 583 void            xfs_iext_remove(xfs_ifork_t *, xfs_extnum_t, int);
 584 void            xfs_iext_remove_inline(xfs_ifork_t *, xfs_extnum_t, int);
 585 void            xfs_iext_remove_direct(xfs_ifork_t *, xfs_extnum_t, int);
 586 void            xfs_iext_remove_indirect(xfs_ifork_t *, xfs_extnum_t, int);
 587 void            xfs_iext_realloc_direct(xfs_ifork_t *, int);
 588 void            xfs_iext_realloc_indirect(xfs_ifork_t *, int);
 589 void            xfs_iext_indirect_to_direct(xfs_ifork_t *);
 590 void            xfs_iext_direct_to_inline(xfs_ifork_t *, xfs_extnum_t);
 591 void            xfs_iext_inline_to_direct(xfs_ifork_t *, int);
 592 void            xfs_iext_destroy(xfs_ifork_t *);
 593 xfs_bmbt_rec_host_t *xfs_iext_bno_to_ext(xfs_ifork_t *, xfs_fileoff_t, int *);
 594 xfs_ext_irec_t  *xfs_iext_bno_to_irec(xfs_ifork_t *, xfs_fileoff_t, int *);
 595 xfs_ext_irec_t  *xfs_iext_idx_to_irec(xfs_ifork_t *, xfs_extnum_t *, int *, int);
 596 void            xfs_iext_irec_init(xfs_ifork_t *);
 597 xfs_ext_irec_t *xfs_iext_irec_new(xfs_ifork_t *, int);
 598 void            xfs_iext_irec_remove(xfs_ifork_t *, int);
 599 void            xfs_iext_irec_compact(xfs_ifork_t *);
 600 void            xfs_iext_irec_compact_pages(xfs_ifork_t *);
 601 void            xfs_iext_irec_compact_full(xfs_ifork_t *);
 602 void            xfs_iext_irec_update_extoffs(xfs_ifork_t *, int, int);
 603
 604 #define xfs_ipincount(ip)       ((unsigned int) atomic_read(&ip->i_pincount))
 605
 606 #ifdef DEBUG
 607 void            xfs_isize_check(struct xfs_mount *, xfs_inode_t *, xfs_fsize_t);
 608 #else   /* DEBUG */
 609 #define xfs_isize_check(mp, ip, isize)
 610 #endif  /* DEBUG */
 611
 612 #if defined(DEBUG)
 613 void            xfs_inobp_check(struct xfs_mount *, struct xfs_buf *);
 614 #else
 615 #define xfs_inobp_check(mp, bp)
 616 #endif /* DEBUG */
 617
 618 extern struct kmem_zone *xfs_icluster_zone;
 619 extern struct kmem_zone *xfs_ifork_zone;
 620 extern struct kmem_zone *xfs_inode_zone;
 621 extern struct kmem_zone *xfs_ili_zone;
 622
 623 #endif  /* __KERNEL__ */
 624
 625 #endif  /* __XFS_INODE_H__ */