libxfs/libxfs_priv.h

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2000-2005 Silicon Graphics, Inc.
   4  * All Rights Reserved.
   5  */
   6
   7 /*
   8  * This header is effectively a "namespace multiplexor" for the
   9  * user level XFS code.  It provides all of the necessary stuff
  10  * such that we can build some parts of the XFS kernel code in
  11  * user space in a controlled fashion, and translates the names
  12  * used in the kernel into the names which libxfs is going to
  13  * make available to user tools.
  14  *
  15  * It should only ever be #include'd by XFS "kernel" code being
  16  * compiled in user space.
  17  *
  18  * Our goals here are to...
  19  *      o  "share" large amounts of complex code between user and
  20  *         kernel space;
  21  *      o  shield the user tools from changes in the bleeding
  22  *         edge kernel code, merging source changes when
  23  *         convenient and not immediately (no symlinks);
  24  *      o  i.e. be able to merge changes to the kernel source back
  25  *         into the affected user tools in a controlled fashion;
  26  *      o  provide a _minimalist_ life-support system for kernel
  27  *         code in user land, not the "everything + the kitchen
  28  *         sink" model which libsim had mutated into;
  29  *      o  allow the kernel code to be completely free of code
  30  *         specifically there to support the user level build.
  31  */
  32
  33 /*
  34  * define a guard and something we can check to determine what include context
  35  * we are running from.
  36  */
  37 #ifndef __LIBXFS_INTERNAL_XFS_H__
  38 #define __LIBXFS_INTERNAL_XFS_H__
  39
  40 #include "libxfs_api_defs.h"
  41 #include "platform_defs.h"
  42 #include "xfs.h"
  43
  44 #include "list.h"
  45 #include "hlist.h"
  46 #include "cache.h"
  47 #include "bitops.h"
  48 #include "kmem.h"
  49 #include "radix-tree.h"
  50 #include "atomic.h"
  51
  52 #include "xfs_types.h"
  53 #include "xfs_arch.h"
  54
  55 #include "xfs_fs.h"
  56
  57 /* CRC stuff, buffer API dependent on it */
  58 extern uint32_t crc32c_le(uint32_t crc, unsigned char const *p, size_t len);
  59 #define crc32c(c,p,l)   crc32c_le((c),(unsigned char const *)(p),(l))
  60
  61 #include "xfs_cksum.h"
  62
  63 /*
  64  * This mirrors the kernel include for xfs_buf.h - it's implicitly included in
  65  * every files via a similar include in the kernel xfs_linux.h.
  66  */
  67 #include "libxfs_io.h"
  68
  69 /* for all the support code that uses progname in error messages */
  70 extern char    *progname;
  71
  72 #undef ASSERT
  73 #define ASSERT(ex) assert(ex)
  74
  75 /*
  76  * We have no need for the "linux" dev_t in userspace, so these
  77  * are no-ops, and an xfs_dev_t is stored in VFS_I(ip)->i_rdev
  78  */
  79 #define xfs_to_linux_dev_t(dev) dev
  80 #define linux_to_xfs_dev_t(dev) dev
  81
  82 #ifndef EWRONGFS
  83 #define EWRONGFS        EINVAL
  84 #endif
  85
  86 #define xfs_error_level                 0
  87
  88 #define STATIC                          static
  89
  90 /*
  91  * Starting in Linux 4.15, the %p (raw pointer value) printk modifier
  92  * prints a hashed version of the pointer to avoid leaking kernel
  93  * pointers into dmesg.  If we're trying to debug the kernel we want the
  94  * raw values, so override this behavior as best we can.
  95  *
  96  * In userspace we don't have this problem.
  97  */
  98 #define PTR_FMT "%p"
  99
 100 /* XXX: need to push these out to make LIBXFS_ATTR defines */
 101 #define ATTR_ROOT                       0x0002
 102 #define ATTR_SECURE                     0x0008
 103 #define ATTR_CREATE                     0x0010
 104 #define ATTR_REPLACE                    0x0020
 105 #define ATTR_KERNOTIME                  0
 106 #define ATTR_KERNOVAL                   0
 107
 108 #define XFS_IGET_CREATE                 0x1
 109 #define XFS_IGET_UNTRUSTED              0x2
 110
 111 extern void cmn_err(int, char *, ...);
 112 enum ce { CE_DEBUG, CE_CONT, CE_NOTE, CE_WARN, CE_ALERT, CE_PANIC };
 113
 114 #define xfs_notice(mp,fmt,args...)              cmn_err(CE_NOTE,fmt, ## args)
 115 #define xfs_warn(mp,fmt,args...)                cmn_err(CE_WARN,fmt, ## args)
 116 #define xfs_err(mp,fmt,args...)                 cmn_err(CE_ALERT,fmt, ## args)
 117 #define xfs_alert(mp,fmt,args...)               cmn_err(CE_ALERT,fmt, ## args)
 118 #define xfs_alert_tag(mp,tag,fmt,args...)       cmn_err(CE_ALERT,fmt, ## args)
 119
 120 #define xfs_hex_dump(d,n)               ((void) 0)
 121
 122 #define xfs_force_shutdown(d,n)         ((void) 0)
 123
 124 /* stop unused var warnings by assigning mp to itself */
 125
 126 #define xfs_corruption_error(e,l,mp,b,sz,fi,ln,fa)      do { \
 127         (mp) = (mp); \
 128         cmn_err(CE_ALERT, "%s: XFS_CORRUPTION_ERROR", (e));  \
 129 } while (0)
 130
 131 #define XFS_CORRUPTION_ERROR(e, lvl, mp, buf, bufsize)  do { \
 132         (mp) = (mp); \
 133         cmn_err(CE_ALERT, "%s: XFS_CORRUPTION_ERROR", (e));  \
 134 } while (0)
 135
 136 #define XFS_ERROR_REPORT(e,l,mp)        do { \
 137         (mp) = (mp); \
 138         cmn_err(CE_ALERT, "%s: XFS_ERROR_REPORT", (e));  \
 139 } while (0)
 140
 141 #define XFS_ERRLEVEL_LOW                1
 142 #define XFS_FORCED_SHUTDOWN(mp)         0
 143 #define XFS_ILOCK_EXCL                  0
 144 #define XFS_STATS_INC(mp, count)        do { (mp) = (mp); } while (0)
 145 #define XFS_STATS_DEC(mp, count, x)     do { (mp) = (mp); } while (0)
 146 #define XFS_STATS_ADD(mp, count, x)     do { (mp) = (mp); } while (0)
 147 #define XFS_TEST_ERROR(expr,a,b)        ( expr )
 148 #define XFS_WANT_CORRUPTED_GOTO(mp, expr, l)                            \
 149 {                                                                       \
 150         if (!(expr)) {                                                  \
 151                 if ((mp)->m_flags & LIBXFS_MOUNT_WANT_CORRUPTED)        \
 152                         printf("WANT_CORRUPTED_GOTO at %s:%d\n",        \
 153                                 __func__, __LINE__);                    \
 154                 error = -EFSCORRUPTED;                                  \
 155                 goto l;                                                 \
 156         }                                                               \
 157 }
 158 #define XFS_WANT_CORRUPTED_RETURN(mp, expr)                             \
 159 {                                                                       \
 160         if (!(expr)) {                                                  \
 161                 if ((mp)->m_flags & LIBXFS_MOUNT_WANT_CORRUPTED)        \
 162                         printf("WANT_CORRUPTED_RETURN at %s:%d\n",      \
 163                                 __func__, __LINE__);                    \
 164                 return -EFSCORRUPTED;                                   \
 165         }                                                               \
 166 }
 167
 168 #ifdef __GNUC__
 169 #define __return_address        __builtin_return_address(0)
 170
 171 /*
 172  * Return the address of a label.  Use barrier() so that the optimizer
 173  * won't reorder code to refactor the error jumpouts into a single
 174  * return, which throws off the reported address.
 175  */
 176 #define __this_address  ({ __label__ __here; __here: barrier(); &&__here; })
 177 /* Optimization barrier */
 178
 179 /* The "volatile" is due to gcc bugs */
 180 #define barrier() __asm__ __volatile__("": : :"memory")
 181 #endif
 182
 183 /* Optimization barrier */
 184 #ifndef barrier
 185 # define barrier() __memory_barrier()
 186 #endif
 187
 188 /* miscellaneous kernel routines not in user space */
 189 #define down_read(a)            ((void) 0)
 190 #define up_read(a)              ((void) 0)
 191 #define spin_lock_init(a)       ((void) 0)
 192 #define spin_lock(a)            ((void) 0)
 193 #define spin_unlock(a)          ((void) 0)
 194 #define likely(x)               (x)
 195 #define unlikely(x)             (x)
 196 #define rcu_read_lock()         ((void) 0)
 197 #define rcu_read_unlock()       ((void) 0)
 198 /* Need to be able to handle this bare or in control flow */
 199 static inline bool WARN_ON_ONCE(bool expr) {
 200         return (expr);
 201 }
 202
 203 #define percpu_counter_read(x)          (*x)
 204 #define percpu_counter_read_positive(x) ((*x) > 0 ? (*x) : 0)
 205 #define percpu_counter_sum(x)           (*x)
 206
 207 /*
 208  * prandom_u32 is used for di_gen inode allocation, it must be zero for libxfs
 209  * or all sorts of badness can occur!
 210  */
 211 #define prandom_u32()           0
 212
 213 #define PAGE_SIZE               getpagesize()
 214
 215 #define inode_peek_iversion(inode)      (inode)->i_version
 216 #define inode_set_iversion_queried(inode, version) do { \
 217         (inode)->i_version = (version); \
 218 } while (0)
 219
 220 static inline int __do_div(unsigned long long *n, unsigned base)
 221 {
 222         int __res;
 223         __res = (int)(((unsigned long) *n) % (unsigned) base);
 224         *n = ((unsigned long) *n) / (unsigned) base;
 225         return __res;
 226 }
 227
 228 #define do_div(n,base)  (__do_div((unsigned long long *)&(n), (base)))
 229 #define do_mod(a, b)            ((a) % (b))
 230 #define rol32(x,y)              (((x) << (y)) | ((x) >> (32 - (y))))
 231
 232 /**
 233  * div_u64_rem - unsigned 64bit divide with 32bit divisor with remainder
 234  * @dividend: unsigned 64bit dividend
 235  * @divisor: unsigned 32bit divisor
 236  * @remainder: pointer to unsigned 32bit remainder
 237  *
 238  * Return: sets ``*remainder``, then returns dividend / divisor
 239  *
 240  * This is commonly provided by 32bit archs to provide an optimized 64bit
 241  * divide.
 242  */
 243 static inline uint64_t
 244 div_u64_rem(uint64_t dividend, uint32_t divisor, uint32_t *remainder)
 245 {
 246         *remainder = dividend % divisor;
 247         return dividend / divisor;
 248 }
 249
 250 #define min_t(type,x,y) \
 251         ({ type __x = (x); type __y = (y); __x < __y ? __x: __y; })
 252 #define max_t(type,x,y) \
 253         ({ type __x = (x); type __y = (y); __x > __y ? __x: __y; })
 254
 255
 256 #define __round_mask(x, y) ((__typeof__(x))((y)-1))
 257 #define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1)
 258 #define round_down(x, y) ((x) & ~__round_mask(x, y))
 259 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
 260
 261 /*
 262  * Handling for kernel bitmap types.
 263  */
 264 #define BITS_TO_LONGS(nr)       DIV_ROUND_UP(nr, NBBY * sizeof(long))
 265 #define DECLARE_BITMAP(name,bits) \
 266         unsigned long name[BITS_TO_LONGS(bits)]
 267 #define BITMAP_FIRST_WORD_MASK(start) (~0UL << ((start) & (BITS_PER_LONG - 1)))
 268
 269 /*
 270  * This is a common helper function for find_next_bit and
 271  * find_next_zero_bit.  The difference is the "invert" argument, which
 272  * is XORed with each fetched word before searching it for one bits.
 273  */
 274 static inline unsigned long
 275 _find_next_bit(const unsigned long *addr, unsigned long nbits,
 276                 unsigned long start, unsigned long invert)
 277 {
 278         unsigned long tmp;
 279
 280         if (!nbits || start >= nbits)
 281                 return nbits;
 282
 283         tmp = addr[start / BITS_PER_LONG] ^ invert;
 284
 285         /* Handle 1st word. */
 286         tmp &= BITMAP_FIRST_WORD_MASK(start);
 287         start = round_down(start, BITS_PER_LONG);
 288
 289         while (!tmp) {
 290                 start += BITS_PER_LONG;
 291                 if (start >= nbits)
 292                         return nbits;
 293
 294                 tmp = addr[start / BITS_PER_LONG] ^ invert;
 295         }
 296
 297         return min(start + ffs(tmp), nbits);
 298 }
 299
 300 /*
 301  * Find the next set bit in a memory region.
 302  */
 303 static inline unsigned long
 304 find_next_bit(const unsigned long *addr, unsigned long size,
 305                 unsigned long offset)
 306 {
 307         return _find_next_bit(addr, size, offset, 0UL);
 308 }
 309 static inline unsigned long
 310 find_next_zero_bit(const unsigned long *addr, unsigned long size,
 311                  unsigned long offset)
 312 {
 313         return _find_next_bit(addr, size, offset, ~0UL);
 314 }
 315 #define find_first_zero_bit(addr, size) find_next_zero_bit((addr), (size), 0)
 316
 317 static inline __attribute__((const))
 318 int is_power_of_2(unsigned long n)
 319 {
 320         return (n != 0 && ((n & (n - 1)) == 0));
 321 }
 322
 323 /*
 324  * xfs_iroundup: round up argument to next power of two
 325  */
 326 static inline uint
 327 roundup_pow_of_two(uint v)
 328 {
 329         int     i;
 330         uint    m;
 331
 332         if ((v & (v - 1)) == 0)
 333                 return v;
 334         ASSERT((v & 0x80000000) == 0);
 335         if ((v & (v + 1)) == 0)
 336                 return v + 1;
 337         for (i = 0, m = 1; i < 31; i++, m <<= 1) {
 338                 if (v & m)
 339                         continue;
 340                 v |= m;
 341                 if ((v & (v + 1)) == 0)
 342                         return v + 1;
 343         }
 344         ASSERT(0);
 345         return 0;
 346 }
 347
 348 static inline uint64_t
 349 roundup_64(uint64_t x, uint32_t y)
 350 {
 351         x += y - 1;
 352         do_div(x, y);
 353         return x * y;
 354 }
 355
 356 /* buffer management */
 357 #define XBF_TRYLOCK                     0
 358 #define XBF_UNMAPPED                    0
 359 #define XBF_DONE                        0
 360 #define xfs_buf_stale(bp)               ((bp)->b_flags |= LIBXFS_B_STALE)
 361 #define XFS_BUF_UNDELAYWRITE(bp)        ((bp)->b_flags &= ~LIBXFS_B_DIRTY)
 362 #define XFS_BUF_SET_BDSTRAT_FUNC(a,b)   ((void) 0)
 363
 364 /* avoid gcc warning */
 365 #define xfs_buf_incore(bt,blkno,len,lockit) ({          \
 366         typeof(blkno) __foo = (blkno);                  \
 367         typeof(len) __bar = (len);                      \
 368         (blkno) = __foo;                                \
 369         (len) = __bar; /* no set-but-unused warning */  \
 370         NULL;                                           \
 371 })
 372 #define xfs_buf_get_uncached(t,n,f)     \
 373         libxfs_getbufr((t), XFS_BUF_DADDR_NULL, (n));
 374 #define xfs_buf_relse(bp)               libxfs_putbuf(bp)
 375 #define xfs_buf_get(devp,blkno,len,f)   (libxfs_getbuf((devp), (blkno), (len)))
 376 #define xfs_bwrite(bp)                  libxfs_writebuf((bp), 0)
 377 #define xfs_buf_delwri_queue(bp, bl)    libxfs_writebuf((bp), 0)
 378 #define xfs_buf_delwri_submit(bl)       (0)
 379 #define xfs_buf_oneshot(bp)             ((void) 0)
 380
 381 #define XBRW_READ                       LIBXFS_BREAD
 382 #define XBRW_WRITE                      LIBXFS_BWRITE
 383 #define xfs_buf_iomove(bp,off,len,data,f)       libxfs_iomove(bp,off,len,data,f)
 384 #define xfs_buf_zero(bp,off,len)        libxfs_iomove(bp,off,len,0,LIBXFS_BZERO)
 385
 386 /* mount stuff */
 387 #define XFS_MOUNT_32BITINODES           LIBXFS_MOUNT_32BITINODES
 388 #define XFS_MOUNT_ATTR2                 LIBXFS_MOUNT_ATTR2
 389 #define XFS_MOUNT_SMALL_INUMS           0       /* ignored in userspace */
 390 #define XFS_MOUNT_WSYNC                 0       /* ignored in userspace */
 391 #define XFS_MOUNT_NOALIGN               0       /* ignored in userspace */
 392 #define XFS_MOUNT_IKEEP                 0       /* ignored in userspace */
 393 #define XFS_MOUNT_SWALLOC               0       /* ignored in userspace */
 394 #define XFS_MOUNT_RDONLY                0       /* ignored in userspace */
 395
 396
 397 #define xfs_trans_set_sync(tp)          ((void) 0)
 398 #define xfs_trans_agblocks_delta(tp, d)
 399 #define xfs_trans_agflist_delta(tp, d)
 400 #define xfs_trans_agbtree_delta(tp, d)
 401 #define xfs_trans_buf_set_type(tp, bp, t)       ({      \
 402         int __t = (t);                                  \
 403         __t = __t; /* no set-but-unused warning */      \
 404         tp = tp;  /* no set-but-unused warning */       \
 405 })
 406
 407 #define xfs_trans_buf_copy_type(dbp, sbp)
 408
 409 /* no readahead, need to avoid set-but-unused var warnings. */
 410 #define xfs_buf_readahead(a,d,c,ops)            ({      \
 411         xfs_daddr_t __d = d;                            \
 412         __d = __d; /* no set-but-unused warning */      \
 413 })
 414 #define xfs_buf_readahead_map(a,b,c,ops)        ((void) 0)      /* no readahead */
 415
 416 #define xfs_sort                                        qsort
 417
 418 #define xfs_ilock(ip,mode)                              ((void) 0)
 419 #define xfs_ilock_nowait(ip,mode)                       ((void) 0)
 420 #define xfs_ilock_demote(ip,mode)                       ((void) 0)
 421 #define xfs_ilock_data_map_shared(ip)                   (0)
 422 #define xfs_ilock_attr_map_shared(ip)                   (0)
 423 #define xfs_iunlock(ip,mode)                            ({      \
 424         typeof(mode) __mode = mode;                             \
 425         __mode = __mode; /* no set-but-unused warning */        \
 426 })
 427
 428 /* space allocation */
 429 #define XFS_EXTENT_BUSY_DISCARDED       0x01    /* undergoing a discard op. */
 430 #define XFS_EXTENT_BUSY_SKIP_DISCARD    0x02    /* do not discard */
 431
 432 #define xfs_extent_busy_reuse(mp,ag,bno,len,user)       ((void) 0)
 433 /* avoid unused variable warning */
 434 #define xfs_extent_busy_insert(tp,ag,bno,len,flags)({   \
 435         xfs_agnumber_t __foo = ag;                      \
 436         __foo = __foo; /* no set-but-unused warning */  \
 437 })
 438 #define xfs_extent_busy_trim(args,bno,len,busy_gen)     ({      \
 439         unsigned __foo = *(busy_gen);                           \
 440         *(busy_gen) = __foo;                                    \
 441         false;                                                  \
 442 })
 443 #define xfs_extent_busy_flush(mp,pag,busy_gen)          ((void)(0))
 444
 445 #define xfs_rotorstep                           1
 446 #define xfs_bmap_rtalloc(a)                     (-ENOSYS)
 447 #define xfs_get_extsz_hint(ip)                  (0)
 448 #define xfs_get_cowextsz_hint(ip)               (0)
 449 #define xfs_inode_is_filestream(ip)             (0)
 450 #define xfs_filestream_lookup_ag(ip)            (0)
 451 #define xfs_filestream_new_ag(ip,ag)            (0)
 452
 453 #define xfs_log_force(mp,flags)                 ((void) 0)
 454 #define XFS_LOG_SYNC                            1
 455
 456 /* quota bits */
 457 #define xfs_trans_mod_dquot_byino(t,i,f,d)              ((void) 0)
 458 #define xfs_trans_reserve_quota_nblks(t,i,b,n,f)        (0)
 459 #define xfs_trans_unreserve_quota_nblks(t,i,b,n,f)      ((void) 0)
 460 #define xfs_qm_dqattach(i)                              (0)
 461
 462 #define uuid_copy(s,d)          platform_uuid_copy((s),(d))
 463 #define uuid_equal(s,d)         (platform_uuid_compare((s),(d)) == 0)
 464
 465 #define xfs_icreate_log(tp, agno, agbno, cnt, isize, len, gen) ((void) 0)
 466 #define xfs_sb_validate_fsb_count(sbp, nblks)           (0)
 467
 468 /*
 469  * Prototypes for kernel static functions that are aren't in their
 470  * associated header files.
 471  */
 472 struct xfs_da_args;
 473 struct xfs_bmap_free;
 474 struct xfs_bmap_free_item;
 475 struct xfs_mount;
 476 struct xfs_sb;
 477 struct xfs_trans;
 478 struct xfs_inode;
 479 struct xfs_log_item;
 480 struct xfs_buf;
 481 struct xfs_buf_map;
 482 struct xfs_buf_log_item;
 483 struct xfs_buftarg;
 484
 485 /* xfs_attr.c */
 486 int xfs_attr_rmtval_get(struct xfs_da_args *);
 487
 488 /* xfs_bmap.c */
 489 void xfs_bmap_del_free(struct xfs_bmap_free *, struct xfs_bmap_free_item *);
 490
 491 /* xfs_mount.c */
 492 int xfs_initialize_perag_data(struct xfs_mount *, xfs_agnumber_t);
 493 void xfs_mount_common(struct xfs_mount *, struct xfs_sb *);
 494
 495 /*
 496  * logitem.c and trans.c prototypes
 497  */
 498 void xfs_trans_init(struct xfs_mount *);
 499 int xfs_trans_roll(struct xfs_trans **);
 500
 501 /* xfs_trans_item.c */
 502 void xfs_trans_add_item(struct xfs_trans *, struct xfs_log_item *);
 503 void xfs_trans_del_item(struct xfs_log_item *);
 504
 505 /* xfs_inode_item.c */
 506 void xfs_inode_item_init(struct xfs_inode *, struct xfs_mount *);
 507
 508 /* xfs_buf_item.c */
 509 void xfs_buf_item_init(struct xfs_buf *, struct xfs_mount *);
 510 void xfs_buf_item_log(struct xfs_buf_log_item *, uint, uint);
 511
 512 /* xfs_trans_buf.c */
 513 struct xfs_buf *xfs_trans_buf_item_match(struct xfs_trans *,
 514                         struct xfs_buftarg *, struct xfs_buf_map *, int);
 515
 516 /* local source files */
 517 #define xfs_mod_fdblocks(mp, delta, rsvd) \
 518         libxfs_mod_incore_sb(mp, XFS_TRANS_SB_FDBLOCKS, delta, rsvd)
 519 #define xfs_mod_frextents(mp, delta) \
 520         libxfs_mod_incore_sb(mp, XFS_TRANS_SB_FREXTENTS, delta, 0)
 521 int  libxfs_mod_incore_sb(struct xfs_mount *, int, int64_t, int);
 522 /* percpu counters in mp are #defined to the superblock sb_ counters */
 523 #define xfs_reinit_percpu_counters(mp)
 524
 525 void xfs_trans_mod_sb(struct xfs_trans *, uint, long);
 526
 527 void xfs_verifier_error(struct xfs_buf *bp, int error,
 528                         xfs_failaddr_t failaddr);
 529 void xfs_inode_verifier_error(struct xfs_inode *ip, int error,
 530                         const char *name, void *buf, size_t bufsz,
 531                         xfs_failaddr_t failaddr);
 532
 533 #define xfs_buf_verifier_error(bp,e,n,bu,bus,fa) \
 534         xfs_verifier_error(bp, e, fa)
 535
 536 /* XXX: this is clearly a bug - a shared header needs to export this */
 537 /* xfs_rtalloc.c */
 538 int libxfs_rtfree_extent(struct xfs_trans *, xfs_rtblock_t, xfs_extlen_t);
 539 bool libxfs_verify_rtbno(struct xfs_mount *mp, xfs_rtblock_t rtbno);
 540
 541 struct xfs_rtalloc_rec {
 542         xfs_rtblock_t           ar_startext;
 543         xfs_rtblock_t           ar_extcount;
 544 };
 545
 546 typedef int (*xfs_rtalloc_query_range_fn)(
 547         struct xfs_trans        *tp,
 548         struct xfs_rtalloc_rec  *rec,
 549         void                    *priv);
 550
 551 int libxfs_zero_extent(struct xfs_inode *ip, xfs_fsblock_t start_fsb,
 552                         xfs_off_t count_fsb);
 553
 554 bool xfs_log_check_lsn(struct xfs_mount *, xfs_lsn_t);
 555
 556 /* xfs_icache.c */
 557 #define xfs_inode_set_cowblocks_tag(ip) do { } while (0)
 558 #define xfs_inode_set_eofblocks_tag(ip) do { } while (0)
 559
 560 /* xfs_stats.h */
 561 #define XFS_STATS_CALC_INDEX(member)    0
 562 #define XFS_STATS_INC_OFF(mp, off)
 563 #define XFS_STATS_ADD_OFF(mp, off, val)
 564
 565 typedef unsigned char u8;
 566 unsigned int hweight8(unsigned int w);
 567 unsigned int hweight32(unsigned int w);
 568 unsigned int hweight64(__u64 w);
 569
 570 #define BIT_MASK(nr)    (1UL << ((nr) % BITS_PER_LONG))
 571 #define BIT_WORD(nr)    ((nr) / BITS_PER_LONG)
 572
 573 static inline void set_bit(int nr, volatile unsigned long *addr)
 574 {
 575         unsigned long mask = BIT_MASK(nr);
 576         unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
 577
 578         *p  |= mask;
 579 }
 580
 581 static inline void clear_bit(int nr, volatile unsigned long *addr)
 582 {
 583         unsigned long mask = BIT_MASK(nr);
 584         unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
 585
 586         *p &= ~mask;
 587 }
 588
 589 static inline int test_bit(int nr, const volatile unsigned long *addr)
 590 {
 591         unsigned long mask = BIT_MASK(nr);
 592         unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
 593
 594         return *p & mask;
 595 }
 596
 597
 598 #endif  /* __LIBXFS_INTERNAL_XFS_H__ */