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
 154         /* di_next_unlinked is the only non-core field in the old dinode */
 155         xfs_agino_t     di_next_unlinked;/* agi unlinked list ptr */
 156
 157         /* start of the extended dinode, writable fields */
 158         __uint32_t      di_crc;         /* CRC of the inode */
 159         __uint64_t      di_changecount; /* number of attribute changes */
 160         xfs_lsn_t       di_lsn;         /* flush sequence */
 161         __uint64_t      di_flags2;      /* more random flags */
 162         __uint8_t       di_pad2[16];    /* more padding for future expansion */
 163
 164         /* fields only written to during inode creation */
 165         xfs_ictimestamp_t di_crtime;    /* time created */
 166         xfs_ino_t       di_ino;         /* inode number */
 167         uuid_t          di_uuid;        /* UUID of the filesystem */
 168
 169         /* structure must be padded to 64 bit alignment */
 170 } xfs_icdinode_t;
 171
 172 static inline uint xfs_icdinode_size(int version)
 173 {
 174         if (version == 3)
 175                 return sizeof(struct xfs_icdinode);
 176         return offsetof(struct xfs_icdinode, di_next_unlinked);
 177 }
 178
 179 /*
 180  * Flags for xfs_ichgtime().
 181  */
 182 #define XFS_ICHGTIME_MOD        0x1     /* data fork modification timestamp */
 183 #define XFS_ICHGTIME_CHG        0x2     /* inode field change timestamp */
 184 #define XFS_ICHGTIME_CREATE     0x4     /* inode create timestamp */
 185
 186 /*
 187  * Per-fork incore inode flags.
 188  */
 189 #define XFS_IFINLINE    0x01    /* Inline data is read in */
 190 #define XFS_IFEXTENTS   0x02    /* All extent pointers are read in */
 191 #define XFS_IFBROOT     0x04    /* i_broot points to the bmap b-tree root */
 192 #define XFS_IFEXTIREC   0x08    /* Indirection array of extent blocks */
 193
 194 /*
 195  * Fork handling.
 196  */
 197
 198 #define XFS_IFORK_Q(ip)                 ((ip)->i_d.di_forkoff != 0)
 199 #define XFS_IFORK_BOFF(ip)              ((int)((ip)->i_d.di_forkoff << 3))
 200
 201 #define XFS_IFORK_PTR(ip,w)             \
 202         ((w) == XFS_DATA_FORK ? \
 203                 &(ip)->i_df : \
 204                 (ip)->i_afp)
 205 #define XFS_IFORK_DSIZE(ip) \
 206         (XFS_IFORK_Q(ip) ? \
 207                 XFS_IFORK_BOFF(ip) : \
 208                 XFS_LITINO((ip)->i_mount, (ip)->i_d.di_version))
 209 #define XFS_IFORK_ASIZE(ip) \
 210         (XFS_IFORK_Q(ip) ? \
 211                 XFS_LITINO((ip)->i_mount, (ip)->i_d.di_version) - \
 212                         XFS_IFORK_BOFF(ip) : \
 213                 0)
 214 #define XFS_IFORK_SIZE(ip,w) \
 215         ((w) == XFS_DATA_FORK ? \
 216                 XFS_IFORK_DSIZE(ip) : \
 217                 XFS_IFORK_ASIZE(ip))
 218 #define XFS_IFORK_FORMAT(ip,w) \
 219         ((w) == XFS_DATA_FORK ? \
 220                 (ip)->i_d.di_format : \
 221                 (ip)->i_d.di_aformat)
 222 #define XFS_IFORK_FMT_SET(ip,w,n) \
 223         ((w) == XFS_DATA_FORK ? \
 224                 ((ip)->i_d.di_format = (n)) : \
 225                 ((ip)->i_d.di_aformat = (n)))
 226 #define XFS_IFORK_NEXTENTS(ip,w) \
 227         ((w) == XFS_DATA_FORK ? \
 228                 (ip)->i_d.di_nextents : \
 229                 (ip)->i_d.di_anextents)
 230 #define XFS_IFORK_NEXT_SET(ip,w,n) \
 231         ((w) == XFS_DATA_FORK ? \
 232                 ((ip)->i_d.di_nextents = (n)) : \
 233                 ((ip)->i_d.di_anextents = (n)))
 234 #define XFS_IFORK_MAXEXT(ip, w) \
 235         (XFS_IFORK_SIZE(ip, w) / sizeof(xfs_bmbt_rec_t))
 236
 237
 238 #ifdef __KERNEL__
 239
 240 struct xfs_buf;
 241 struct xfs_bmap_free;
 242 struct xfs_bmbt_irec;
 243 struct xfs_inode_log_item;
 244 struct xfs_mount;
 245 struct xfs_trans;
 246 struct xfs_dquot;
 247
 248 typedef struct xfs_inode {
 249         /* Inode linking and identification information. */
 250         struct xfs_mount        *i_mount;       /* fs mount struct ptr */
 251         struct xfs_dquot        *i_udquot;      /* user dquot */
 252         struct xfs_dquot        *i_gdquot;      /* group dquot */
 253
 254         /* Inode location stuff */
 255         xfs_ino_t               i_ino;          /* inode number (agno/agino)*/
 256         struct xfs_imap         i_imap;         /* location for xfs_imap() */
 257
 258         /* Extent information. */
 259         xfs_ifork_t             *i_afp;         /* attribute fork pointer */
 260         xfs_ifork_t             i_df;           /* data fork */
 261
 262         /* Transaction and locking information. */
 263         struct xfs_inode_log_item *i_itemp;     /* logging information */
 264         mrlock_t                i_lock;         /* inode lock */
 265         mrlock_t                i_iolock;       /* inode IO lock */
 266         atomic_t                i_pincount;     /* inode pin count */
 267         spinlock_t              i_flags_lock;   /* inode i_flags lock */
 268         /* Miscellaneous state. */
 269         unsigned long           i_flags;        /* see defined flags below */
 270         unsigned int            i_delayed_blks; /* count of delay alloc blks */
 271
 272         xfs_icdinode_t          i_d;            /* most of ondisk inode */
 273
 274         /* VFS inode */
 275         struct inode            i_vnode;        /* embedded VFS inode */
 276 } xfs_inode_t;
 277
 278 /* Convert from vfs inode to xfs inode */
 279 static inline struct xfs_inode *XFS_I(struct inode *inode)
 280 {
 281         return container_of(inode, struct xfs_inode, i_vnode);
 282 }
 283
 284 /* convert from xfs inode to vfs inode */
 285 static inline struct inode *VFS_I(struct xfs_inode *ip)
 286 {
 287         return &ip->i_vnode;
 288 }
 289
 290 /*
 291  * For regular files we only update the on-disk filesize when actually
 292  * writing data back to disk.  Until then only the copy in the VFS inode
 293  * is uptodate.
 294  */
 295 static inline xfs_fsize_t XFS_ISIZE(struct xfs_inode *ip)
 296 {
 297         if (S_ISREG(ip->i_d.di_mode))
 298                 return i_size_read(VFS_I(ip));
 299         return ip->i_d.di_size;
 300 }
 301
 302 /*
 303  * If this I/O goes past the on-disk inode size update it unless it would
 304  * be past the current in-core inode size.
 305  */
 306 static inline xfs_fsize_t
 307 xfs_new_eof(struct xfs_inode *ip, xfs_fsize_t new_size)
 308 {
 309         xfs_fsize_t i_size = i_size_read(VFS_I(ip));
 310
 311         if (new_size > i_size)
 312                 new_size = i_size;
 313         return new_size > ip->i_d.di_size ? new_size : 0;
 314 }
 315
 316 /*
 317  * i_flags helper functions
 318  */
 319 static inline void
 320 __xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
 321 {
 322         ip->i_flags |= flags;
 323 }
 324
 325 static inline void
 326 xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
 327 {
 328         spin_lock(&ip->i_flags_lock);
 329         __xfs_iflags_set(ip, flags);
 330         spin_unlock(&ip->i_flags_lock);
 331 }
 332
 333 static inline void
 334 xfs_iflags_clear(xfs_inode_t *ip, unsigned short flags)
 335 {
 336         spin_lock(&ip->i_flags_lock);
 337         ip->i_flags &= ~flags;
 338         spin_unlock(&ip->i_flags_lock);
 339 }
 340
 341 static inline int
 342 __xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
 343 {
 344         return (ip->i_flags & flags);
 345 }
 346
 347 static inline int
 348 xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
 349 {
 350         int ret;
 351         spin_lock(&ip->i_flags_lock);
 352         ret = __xfs_iflags_test(ip, flags);
 353         spin_unlock(&ip->i_flags_lock);
 354         return ret;
 355 }
 356
 357 static inline int
 358 xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned short flags)
 359 {
 360         int ret;
 361
 362         spin_lock(&ip->i_flags_lock);
 363         ret = ip->i_flags & flags;
 364         if (ret)
 365                 ip->i_flags &= ~flags;
 366         spin_unlock(&ip->i_flags_lock);
 367         return ret;
 368 }
 369
 370 static inline int
 371 xfs_iflags_test_and_set(xfs_inode_t *ip, unsigned short flags)
 372 {
 373         int ret;
 374
 375         spin_lock(&ip->i_flags_lock);
 376         ret = ip->i_flags & flags;
 377         if (!ret)
 378                 ip->i_flags |= flags;
 379         spin_unlock(&ip->i_flags_lock);
 380         return ret;
 381 }
 382
 383 /*
 384  * Project quota id helpers (previously projid was 16bit only
 385  * and using two 16bit values to hold new 32bit projid was chosen
 386  * to retain compatibility with "old" filesystems).
 387  */
 388 static inline prid_t
 389 xfs_get_projid(struct xfs_inode *ip)
 390 {
 391         return (prid_t)ip->i_d.di_projid_hi << 16 | ip->i_d.di_projid_lo;
 392 }
 393
 394 static inline void
 395 xfs_set_projid(struct xfs_inode *ip,
 396                 prid_t projid)
 397 {
 398         ip->i_d.di_projid_hi = (__uint16_t) (projid >> 16);
 399         ip->i_d.di_projid_lo = (__uint16_t) (projid & 0xffff);
 400 }
 401
 402 /*
 403  * In-core inode flags.
 404  */
 405 #define XFS_IRECLAIM            (1 << 0) /* started reclaiming this inode */
 406 #define XFS_ISTALE              (1 << 1) /* inode has been staled */
 407 #define XFS_IRECLAIMABLE        (1 << 2) /* inode can be reclaimed */
 408 #define XFS_INEW                (1 << 3) /* inode has just been allocated */
 409 #define XFS_IFILESTREAM         (1 << 4) /* inode is in a filestream dir. */
 410 #define XFS_ITRUNCATED          (1 << 5) /* truncated down so flush-on-close */
 411 #define XFS_IDIRTY_RELEASE      (1 << 6) /* dirty release already seen */
 412 #define __XFS_IFLOCK_BIT        7        /* inode is being flushed right now */
 413 #define XFS_IFLOCK              (1 << __XFS_IFLOCK_BIT)
 414 #define __XFS_IPINNED_BIT       8        /* wakeup key for zero pin count */
 415 #define XFS_IPINNED             (1 << __XFS_IPINNED_BIT)
 416 #define XFS_IDONTCACHE          (1 << 9) /* don't cache the inode long term */
 417
 418 /*
 419  * Per-lifetime flags need to be reset when re-using a reclaimable inode during
 420  * inode lookup. This prevents unintended behaviour on the new inode from
 421  * ocurring.
 422  */
 423 #define XFS_IRECLAIM_RESET_FLAGS        \
 424         (XFS_IRECLAIMABLE | XFS_IRECLAIM | \
 425          XFS_IDIRTY_RELEASE | XFS_ITRUNCATED | \
 426          XFS_IFILESTREAM);
 427
 428 /*
 429  * Synchronize processes attempting to flush the in-core inode back to disk.
 430  */
 431
 432 extern void __xfs_iflock(struct xfs_inode *ip);
 433
 434 static inline int xfs_iflock_nowait(struct xfs_inode *ip)
 435 {
 436         return !xfs_iflags_test_and_set(ip, XFS_IFLOCK);
 437 }
 438
 439 static inline void xfs_iflock(struct xfs_inode *ip)
 440 {
 441         if (!xfs_iflock_nowait(ip))
 442                 __xfs_iflock(ip);
 443 }
 444
 445 static inline void xfs_ifunlock(struct xfs_inode *ip)
 446 {
 447         xfs_iflags_clear(ip, XFS_IFLOCK);
 448         smp_mb();
 449         wake_up_bit(&ip->i_flags, __XFS_IFLOCK_BIT);
 450 }
 451
 452 static inline int xfs_isiflocked(struct xfs_inode *ip)
 453 {
 454         return xfs_iflags_test(ip, XFS_IFLOCK);
 455 }
 456
 457 /*
 458  * Flags for inode locking.
 459  * Bit ranges:  1<<1  - 1<<16-1 -- iolock/ilock modes (bitfield)
 460  *              1<<16 - 1<<32-1 -- lockdep annotation (integers)
 461  */
 462 #define XFS_IOLOCK_EXCL         (1<<0)
 463 #define XFS_IOLOCK_SHARED       (1<<1)
 464 #define XFS_ILOCK_EXCL          (1<<2)
 465 #define XFS_ILOCK_SHARED        (1<<3)
 466
 467 #define XFS_LOCK_MASK           (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \
 468                                 | XFS_ILOCK_EXCL | XFS_ILOCK_SHARED)
 469
 470 #define XFS_LOCK_FLAGS \
 471         { XFS_IOLOCK_EXCL,      "IOLOCK_EXCL" }, \
 472         { XFS_IOLOCK_SHARED,    "IOLOCK_SHARED" }, \
 473         { XFS_ILOCK_EXCL,       "ILOCK_EXCL" }, \
 474         { XFS_ILOCK_SHARED,     "ILOCK_SHARED" }
 475
 476
 477 /*
 478  * Flags for lockdep annotations.
 479  *
 480  * XFS_LOCK_PARENT - for directory operations that require locking a
 481  * parent directory inode and a child entry inode.  The parent gets locked
 482  * with this flag so it gets a lockdep subclass of 1 and the child entry
 483  * lock will have a lockdep subclass of 0.
 484  *
 485  * XFS_LOCK_RTBITMAP/XFS_LOCK_RTSUM - the realtime device bitmap and summary
 486  * inodes do not participate in the normal lock order, and thus have their
 487  * own subclasses.
 488  *
 489  * XFS_LOCK_INUMORDER - for locking several inodes at the some time
 490  * with xfs_lock_inodes().  This flag is used as the starting subclass
 491  * and each subsequent lock acquired will increment the subclass by one.
 492  * So the first lock acquired will have a lockdep subclass of 4, the
 493  * second lock will have a lockdep subclass of 5, and so on. It is
 494  * the responsibility of the class builder to shift this to the correct
 495  * portion of the lock_mode lockdep mask.
 496  */
 497 #define XFS_LOCK_PARENT         1
 498 #define XFS_LOCK_RTBITMAP       2
 499 #define XFS_LOCK_RTSUM          3
 500 #define XFS_LOCK_INUMORDER      4
 501
 502 #define XFS_IOLOCK_SHIFT        16
 503 #define XFS_IOLOCK_PARENT       (XFS_LOCK_PARENT << XFS_IOLOCK_SHIFT)
 504
 505 #define XFS_ILOCK_SHIFT         24
 506 #define XFS_ILOCK_PARENT        (XFS_LOCK_PARENT << XFS_ILOCK_SHIFT)
 507 #define XFS_ILOCK_RTBITMAP      (XFS_LOCK_RTBITMAP << XFS_ILOCK_SHIFT)
 508 #define XFS_ILOCK_RTSUM         (XFS_LOCK_RTSUM << XFS_ILOCK_SHIFT)
 509
 510 #define XFS_IOLOCK_DEP_MASK     0x00ff0000
 511 #define XFS_ILOCK_DEP_MASK      0xff000000
 512 #define XFS_LOCK_DEP_MASK       (XFS_IOLOCK_DEP_MASK | XFS_ILOCK_DEP_MASK)
 513
 514 #define XFS_IOLOCK_DEP(flags)   (((flags) & XFS_IOLOCK_DEP_MASK) >> XFS_IOLOCK_SHIFT)
 515 #define XFS_ILOCK_DEP(flags)    (((flags) & XFS_ILOCK_DEP_MASK) >> XFS_ILOCK_SHIFT)
 516
 517 /*
 518  * For multiple groups support: if S_ISGID bit is set in the parent
 519  * directory, group of new file is set to that of the parent, and
 520  * new subdirectory gets S_ISGID bit from parent.
 521  */
 522 #define XFS_INHERIT_GID(pip)    \
 523         (((pip)->i_mount->m_flags & XFS_MOUNT_GRPID) || \
 524          ((pip)->i_d.di_mode & S_ISGID))
 525
 526
 527 /*
 528  * xfs_inode.c prototypes.
 529  */
 530 void            xfs_ilock(xfs_inode_t *, uint);
 531 int             xfs_ilock_nowait(xfs_inode_t *, uint);
 532 void            xfs_iunlock(xfs_inode_t *, uint);
 533 void            xfs_ilock_demote(xfs_inode_t *, uint);
 534 int             xfs_isilocked(xfs_inode_t *, uint);
 535 uint            xfs_ilock_map_shared(xfs_inode_t *);
 536 void            xfs_iunlock_map_shared(xfs_inode_t *, uint);
 537 int             xfs_ialloc(struct xfs_trans *, xfs_inode_t *, umode_t,
 538                            xfs_nlink_t, xfs_dev_t, prid_t, int,
 539                            struct xfs_buf **, xfs_inode_t **);
 540
 541 uint            xfs_ip2xflags(struct xfs_inode *);
 542 uint            xfs_dic2xflags(struct xfs_dinode *);
 543 int             xfs_ifree(struct xfs_trans *, xfs_inode_t *,
 544                            struct xfs_bmap_free *);
 545 int             xfs_itruncate_extents(struct xfs_trans **, struct xfs_inode *,
 546                                       int, xfs_fsize_t);
 547 int             xfs_iunlink(struct xfs_trans *, xfs_inode_t *);
 548
 549 void            xfs_iext_realloc(xfs_inode_t *, int, int);
 550 void            xfs_iunpin_wait(xfs_inode_t *);
 551 int             xfs_iflush(struct xfs_inode *, struct xfs_buf **);
 552 void            xfs_lock_inodes(xfs_inode_t **, int, uint);
 553 void            xfs_lock_two_inodes(xfs_inode_t *, xfs_inode_t *, uint);
 554
 555 xfs_extlen_t    xfs_get_extsz_hint(struct xfs_inode *ip);
 556
 557 #define IHOLD(ip) \
 558 do { \
 559         ASSERT(atomic_read(&VFS_I(ip)->i_count) > 0) ; \
 560         ihold(VFS_I(ip)); \
 561         trace_xfs_ihold(ip, _THIS_IP_); \
 562 } while (0)
 563
 564 #define IRELE(ip) \
 565 do { \
 566         trace_xfs_irele(ip, _THIS_IP_); \
 567         iput(VFS_I(ip)); \
 568 } while (0)
 569
 570 #endif /* __KERNEL__ */
 571
 572 /*
 573  * Flags for xfs_iget()
 574  */
 575 #define XFS_IGET_CREATE         0x1
 576 #define XFS_IGET_UNTRUSTED      0x2
 577 #define XFS_IGET_DONTCACHE      0x4
 578
 579 int             xfs_imap_to_bp(struct xfs_mount *, struct xfs_trans *,
 580                                struct xfs_imap *, struct xfs_dinode **,
 581                                struct xfs_buf **, uint, uint);
 582 int             xfs_iread(struct xfs_mount *, struct xfs_trans *,
 583                           struct xfs_inode *, uint);
 584 void            xfs_dinode_calc_crc(struct xfs_mount *, struct xfs_dinode *);
 585 void            xfs_dinode_to_disk(struct xfs_dinode *,
 586                                    struct xfs_icdinode *);
 587 void            xfs_idestroy_fork(struct xfs_inode *, int);
 588 void            xfs_idata_realloc(struct xfs_inode *, int, int);
 589 void            xfs_iroot_realloc(struct xfs_inode *, int, int);
 590 int             xfs_iread_extents(struct xfs_trans *, struct xfs_inode *, int);
 591 int             xfs_iextents_copy(struct xfs_inode *, xfs_bmbt_rec_t *, int);
 592
 593 xfs_bmbt_rec_host_t *xfs_iext_get_ext(xfs_ifork_t *, xfs_extnum_t);
 594 void            xfs_iext_insert(xfs_inode_t *, xfs_extnum_t, xfs_extnum_t,
 595                                 xfs_bmbt_irec_t *, int);
 596 void            xfs_iext_add(xfs_ifork_t *, xfs_extnum_t, int);
 597 void            xfs_iext_add_indirect_multi(xfs_ifork_t *, int, xfs_extnum_t, int);
 598 void            xfs_iext_remove(xfs_inode_t *, xfs_extnum_t, int, int);
 599 void            xfs_iext_remove_inline(xfs_ifork_t *, xfs_extnum_t, int);
 600 void            xfs_iext_remove_direct(xfs_ifork_t *, xfs_extnum_t, int);
 601 void            xfs_iext_remove_indirect(xfs_ifork_t *, xfs_extnum_t, int);
 602 void            xfs_iext_realloc_direct(xfs_ifork_t *, int);
 603 void            xfs_iext_direct_to_inline(xfs_ifork_t *, xfs_extnum_t);
 604 void            xfs_iext_inline_to_direct(xfs_ifork_t *, int);
 605 void            xfs_iext_destroy(xfs_ifork_t *);
 606 xfs_bmbt_rec_host_t *xfs_iext_bno_to_ext(xfs_ifork_t *, xfs_fileoff_t, int *);
 607 xfs_ext_irec_t  *xfs_iext_bno_to_irec(xfs_ifork_t *, xfs_fileoff_t, int *);
 608 xfs_ext_irec_t  *xfs_iext_idx_to_irec(xfs_ifork_t *, xfs_extnum_t *, int *, int);
 609 void            xfs_iext_irec_init(xfs_ifork_t *);
 610 xfs_ext_irec_t *xfs_iext_irec_new(xfs_ifork_t *, int);
 611 void            xfs_iext_irec_remove(xfs_ifork_t *, int);
 612 void            xfs_iext_irec_compact(xfs_ifork_t *);
 613 void            xfs_iext_irec_compact_pages(xfs_ifork_t *);
 614 void            xfs_iext_irec_compact_full(xfs_ifork_t *);
 615 void            xfs_iext_irec_update_extoffs(xfs_ifork_t *, int, int);
 616 bool            xfs_can_free_eofblocks(struct xfs_inode *, bool);
 617
 618 #define xfs_ipincount(ip)       ((unsigned int) atomic_read(&ip->i_pincount))
 619
 620 #if defined(DEBUG)
 621 void            xfs_inobp_check(struct xfs_mount *, struct xfs_buf *);
 622 #else
 623 #define xfs_inobp_check(mp, bp)
 624 #endif /* DEBUG */
 625
 626 extern struct kmem_zone *xfs_ifork_zone;
 627 extern struct kmem_zone *xfs_inode_zone;
 628 extern struct kmem_zone *xfs_ili_zone;
 629 extern const struct xfs_buf_ops xfs_inode_buf_ops;
 630
 631 #endif  /* __XFS_INODE_H__ */