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 #include "crc32c.h"
  57
  58 /* CRC stuff, buffer API dependent on it */
  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  * swap - swap values of @a and @b
 257  * @a: first value
 258  * @b: second value
 259  */
 260 #define swap(a, b) \
 261         do { typeof(a) __tmp = (a); (a) = (b); (b) = __tmp; } while (0)
 262
 263 #define __round_mask(x, y) ((__typeof__(x))((y)-1))
 264 #define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1)
 265 #define round_down(x, y) ((x) & ~__round_mask(x, y))
 266 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
 267
 268 /*
 269  * Handling for kernel bitmap types.
 270  */
 271 #define BITS_TO_LONGS(nr)       DIV_ROUND_UP(nr, NBBY * sizeof(long))
 272 #define DECLARE_BITMAP(name,bits) \
 273         unsigned long name[BITS_TO_LONGS(bits)]
 274 #define BITMAP_FIRST_WORD_MASK(start) (~0UL << ((start) & (BITS_PER_LONG - 1)))
 275
 276 /*
 277  * This is a common helper function for find_next_bit and
 278  * find_next_zero_bit.  The difference is the "invert" argument, which
 279  * is XORed with each fetched word before searching it for one bits.
 280  */
 281 static inline unsigned long
 282 _find_next_bit(const unsigned long *addr, unsigned long nbits,
 283                 unsigned long start, unsigned long invert)
 284 {
 285         unsigned long tmp;
 286
 287         if (!nbits || start >= nbits)
 288                 return nbits;
 289
 290         tmp = addr[start / BITS_PER_LONG] ^ invert;
 291
 292         /* Handle 1st word. */
 293         tmp &= BITMAP_FIRST_WORD_MASK(start);
 294         start = round_down(start, BITS_PER_LONG);
 295
 296         while (!tmp) {
 297                 start += BITS_PER_LONG;
 298                 if (start >= nbits)
 299                         return nbits;
 300
 301                 tmp = addr[start / BITS_PER_LONG] ^ invert;
 302         }
 303
 304         return min(start + ffs(tmp), nbits);
 305 }
 306
 307 /*
 308  * Find the next set bit in a memory region.
 309  */
 310 static inline unsigned long
 311 find_next_bit(const unsigned long *addr, unsigned long size,
 312                 unsigned long offset)
 313 {
 314         return _find_next_bit(addr, size, offset, 0UL);
 315 }
 316 static inline unsigned long
 317 find_next_zero_bit(const unsigned long *addr, unsigned long size,
 318                  unsigned long offset)
 319 {
 320         return _find_next_bit(addr, size, offset, ~0UL);
 321 }
 322 #define find_first_zero_bit(addr, size) find_next_zero_bit((addr), (size), 0)
 323
 324 static inline __attribute__((const))
 325 int is_power_of_2(unsigned long n)
 326 {
 327         return (n != 0 && ((n & (n - 1)) == 0));
 328 }
 329
 330 /*
 331  * xfs_iroundup: round up argument to next power of two
 332  */
 333 static inline uint
 334 roundup_pow_of_two(uint v)
 335 {
 336         int     i;
 337         uint    m;
 338
 339         if ((v & (v - 1)) == 0)
 340                 return v;
 341         ASSERT((v & 0x80000000) == 0);
 342         if ((v & (v + 1)) == 0)
 343                 return v + 1;
 344         for (i = 0, m = 1; i < 31; i++, m <<= 1) {
 345                 if (v & m)
 346                         continue;
 347                 v |= m;
 348                 if ((v & (v + 1)) == 0)
 349                         return v + 1;
 350         }
 351         ASSERT(0);
 352         return 0;
 353 }
 354
 355 static inline uint64_t
 356 roundup_64(uint64_t x, uint32_t y)
 357 {
 358         x += y - 1;
 359         do_div(x, y);
 360         return x * y;
 361 }
 362
 363 /* buffer management */
 364 #define XBF_TRYLOCK                     0
 365 #define XBF_UNMAPPED                    0
 366 #define XBF_DONE                        0
 367 #define xfs_buf_stale(bp)               ((bp)->b_flags |= LIBXFS_B_STALE)
 368 #define XFS_BUF_UNDELAYWRITE(bp)        ((bp)->b_flags &= ~LIBXFS_B_DIRTY)
 369 #define XFS_BUF_SET_BDSTRAT_FUNC(a,b)   ((void) 0)
 370
 371 /* avoid gcc warning */
 372 #define xfs_buf_incore(bt,blkno,len,lockit) ({          \
 373         typeof(blkno) __foo = (blkno);                  \
 374         typeof(len) __bar = (len);                      \
 375         (blkno) = __foo;                                \
 376         (len) = __bar; /* no set-but-unused warning */  \
 377         NULL;                                           \
 378 })
 379 #define xfs_buf_get_uncached(t,n,f)     \
 380         libxfs_getbufr((t), XFS_BUF_DADDR_NULL, (n));
 381 #define xfs_buf_relse(bp)               libxfs_putbuf(bp)
 382 #define xfs_buf_get(devp,blkno,len,f)   (libxfs_getbuf((devp), (blkno), (len)))
 383 #define xfs_bwrite(bp)                  libxfs_writebuf((bp), 0)
 384 #define xfs_buf_delwri_queue(bp, bl)    libxfs_writebuf((bp), 0)
 385 #define xfs_buf_delwri_submit(bl)       (0)
 386 #define xfs_buf_oneshot(bp)             ((void) 0)
 387
 388 #define XBRW_READ                       LIBXFS_BREAD
 389 #define XBRW_WRITE                      LIBXFS_BWRITE
 390 #define xfs_buf_iomove(bp,off,len,data,f)       libxfs_iomove(bp,off,len,data,f)
 391 #define xfs_buf_zero(bp,off,len)        libxfs_iomove(bp,off,len,0,LIBXFS_BZERO)
 392
 393 /* mount stuff */
 394 #define XFS_MOUNT_32BITINODES           LIBXFS_MOUNT_32BITINODES
 395 #define XFS_MOUNT_ATTR2                 LIBXFS_MOUNT_ATTR2
 396 #define XFS_MOUNT_SMALL_INUMS           0       /* ignored in userspace */
 397 #define XFS_MOUNT_WSYNC                 0       /* ignored in userspace */
 398 #define XFS_MOUNT_NOALIGN               0       /* ignored in userspace */
 399 #define XFS_MOUNT_IKEEP                 0       /* ignored in userspace */
 400 #define XFS_MOUNT_SWALLOC               0       /* ignored in userspace */
 401 #define XFS_MOUNT_RDONLY                0       /* ignored in userspace */
 402 #define XFS_MOUNT_BAD_SUMMARY           0       /* ignored in userspace */
 403
 404 #define xfs_trans_set_sync(tp)          ((void) 0)
 405 #define xfs_trans_agblocks_delta(tp, d)
 406 #define xfs_trans_agflist_delta(tp, d)
 407 #define xfs_trans_agbtree_delta(tp, d)
 408 #define xfs_trans_buf_set_type(tp, bp, t)       ({      \
 409         int __t = (t);                                  \
 410         __t = __t; /* no set-but-unused warning */      \
 411         tp = tp;  /* no set-but-unused warning */       \
 412 })
 413
 414 #define xfs_trans_buf_copy_type(dbp, sbp)
 415
 416 /* no readahead, need to avoid set-but-unused var warnings. */
 417 #define xfs_buf_readahead(a,d,c,ops)            ({      \
 418         xfs_daddr_t __d = d;                            \
 419         __d = __d; /* no set-but-unused warning */      \
 420 })
 421 #define xfs_buf_readahead_map(a,b,c,ops)        ((void) 0)      /* no readahead */
 422
 423 #define xfs_sort                                        qsort
 424
 425 #define xfs_ilock(ip,mode)                              ((void) 0)
 426 #define xfs_ilock_nowait(ip,mode)                       ((void) 0)
 427 #define xfs_ilock_demote(ip,mode)                       ((void) 0)
 428 #define xfs_ilock_data_map_shared(ip)                   (0)
 429 #define xfs_ilock_attr_map_shared(ip)                   (0)
 430 #define xfs_iunlock(ip,mode)                            ({      \
 431         typeof(mode) __mode = mode;                             \
 432         __mode = __mode; /* no set-but-unused warning */        \
 433 })
 434
 435 /* space allocation */
 436 #define XFS_EXTENT_BUSY_DISCARDED       0x01    /* undergoing a discard op. */
 437 #define XFS_EXTENT_BUSY_SKIP_DISCARD    0x02    /* do not discard */
 438
 439 #define xfs_extent_busy_reuse(mp,ag,bno,len,user)       ((void) 0)
 440 /* avoid unused variable warning */
 441 #define xfs_extent_busy_insert(tp,ag,bno,len,flags)({   \
 442         xfs_agnumber_t __foo = ag;                      \
 443         __foo = __foo; /* no set-but-unused warning */  \
 444 })
 445 #define xfs_extent_busy_trim(args,bno,len,busy_gen)     ({      \
 446         unsigned __foo = *(busy_gen);                           \
 447         *(busy_gen) = __foo;                                    \
 448         false;                                                  \
 449 })
 450 #define xfs_extent_busy_flush(mp,pag,busy_gen)          ((void)(0))
 451
 452 #define xfs_rotorstep                           1
 453 #define xfs_bmap_rtalloc(a)                     (-ENOSYS)
 454 #define xfs_get_extsz_hint(ip)                  (0)
 455 #define xfs_get_cowextsz_hint(ip)               (0)
 456 #define xfs_inode_is_filestream(ip)             (0)
 457 #define xfs_filestream_lookup_ag(ip)            (0)
 458 #define xfs_filestream_new_ag(ip,ag)            (0)
 459
 460 #define xfs_log_force(mp,flags)                 ((void) 0)
 461 #define XFS_LOG_SYNC                            1
 462
 463 /* quota bits */
 464 #define xfs_trans_mod_dquot_byino(t,i,f,d)              ((void) 0)
 465 #define xfs_trans_reserve_quota_nblks(t,i,b,n,f)        (0)
 466 #define xfs_trans_unreserve_quota_nblks(t,i,b,n,f)      ((void) 0)
 467 #define xfs_qm_dqattach(i)                              (0)
 468
 469 #define uuid_copy(s,d)          platform_uuid_copy((s),(d))
 470 #define uuid_equal(s,d)         (platform_uuid_compare((s),(d)) == 0)
 471
 472 #define xfs_icreate_log(tp, agno, agbno, cnt, isize, len, gen) ((void) 0)
 473 #define xfs_sb_validate_fsb_count(sbp, nblks)           (0)
 474
 475 /*
 476  * Prototypes for kernel static functions that are aren't in their
 477  * associated header files.
 478  */
 479 struct xfs_da_args;
 480 struct xfs_bmap_free;
 481 struct xfs_bmap_free_item;
 482 struct xfs_mount;
 483 struct xfs_sb;
 484 struct xfs_trans;
 485 struct xfs_inode;
 486 struct xfs_log_item;
 487 struct xfs_buf;
 488 struct xfs_buf_map;
 489 struct xfs_buf_log_item;
 490 struct xfs_buftarg;
 491
 492 /* xfs_attr.c */
 493 int xfs_attr_rmtval_get(struct xfs_da_args *);
 494
 495 /* xfs_bmap.c */
 496 void xfs_bmap_del_free(struct xfs_bmap_free *, struct xfs_bmap_free_item *);
 497
 498 /* xfs_mount.c */
 499 int xfs_initialize_perag_data(struct xfs_mount *, xfs_agnumber_t);
 500 void xfs_mount_common(struct xfs_mount *, struct xfs_sb *);
 501
 502 /*
 503  * logitem.c and trans.c prototypes
 504  */
 505 void xfs_trans_init(struct xfs_mount *);
 506 int xfs_trans_roll(struct xfs_trans **);
 507
 508 /* xfs_trans_item.c */
 509 void xfs_trans_add_item(struct xfs_trans *, struct xfs_log_item *);
 510 void xfs_trans_del_item(struct xfs_log_item *);
 511
 512 /* xfs_inode_item.c */
 513 void xfs_inode_item_init(struct xfs_inode *, struct xfs_mount *);
 514
 515 /* xfs_buf_item.c */
 516 void xfs_buf_item_init(struct xfs_buf *, struct xfs_mount *);
 517 void xfs_buf_item_log(struct xfs_buf_log_item *, uint, uint);
 518
 519 /* xfs_trans_buf.c */
 520 struct xfs_buf *xfs_trans_buf_item_match(struct xfs_trans *,
 521                         struct xfs_buftarg *, struct xfs_buf_map *, int);
 522
 523 /* local source files */
 524 #define xfs_mod_fdblocks(mp, delta, rsvd) \
 525         libxfs_mod_incore_sb(mp, XFS_TRANS_SB_FDBLOCKS, delta, rsvd)
 526 #define xfs_mod_frextents(mp, delta) \
 527         libxfs_mod_incore_sb(mp, XFS_TRANS_SB_FREXTENTS, delta, 0)
 528 int  libxfs_mod_incore_sb(struct xfs_mount *, int, int64_t, int);
 529 /* percpu counters in mp are #defined to the superblock sb_ counters */
 530 #define xfs_reinit_percpu_counters(mp)
 531
 532 void xfs_trans_mod_sb(struct xfs_trans *, uint, long);
 533
 534 void xfs_verifier_error(struct xfs_buf *bp, int error,
 535                         xfs_failaddr_t failaddr);
 536 void xfs_inode_verifier_error(struct xfs_inode *ip, int error,
 537                         const char *name, void *buf, size_t bufsz,
 538                         xfs_failaddr_t failaddr);
 539
 540 #define xfs_buf_verifier_error(bp,e,n,bu,bus,fa) \
 541         xfs_verifier_error(bp, e, fa)
 542
 543 /* XXX: this is clearly a bug - a shared header needs to export this */
 544 /* xfs_rtalloc.c */
 545 int libxfs_rtfree_extent(struct xfs_trans *, xfs_rtblock_t, xfs_extlen_t);
 546 bool libxfs_verify_rtbno(struct xfs_mount *mp, xfs_rtblock_t rtbno);
 547
 548 struct xfs_rtalloc_rec {
 549         xfs_rtblock_t           ar_startext;
 550         xfs_rtblock_t           ar_extcount;
 551 };
 552
 553 typedef int (*xfs_rtalloc_query_range_fn)(
 554         struct xfs_trans        *tp,
 555         struct xfs_rtalloc_rec  *rec,
 556         void                    *priv);
 557
 558 int libxfs_zero_extent(struct xfs_inode *ip, xfs_fsblock_t start_fsb,
 559                         xfs_off_t count_fsb);
 560
 561
 562 bool xfs_log_check_lsn(struct xfs_mount *, xfs_lsn_t);
 563 #define xfs_log_in_recovery(mp) (false)
 564
 565 /* xfs_icache.c */
 566 #define xfs_inode_set_cowblocks_tag(ip) do { } while (0)
 567 #define xfs_inode_set_eofblocks_tag(ip) do { } while (0)
 568
 569 /* xfs_stats.h */
 570 #define XFS_STATS_CALC_INDEX(member)    0
 571 #define XFS_STATS_INC_OFF(mp, off)
 572 #define XFS_STATS_ADD_OFF(mp, off, val)
 573
 574 typedef unsigned char u8;
 575 unsigned int hweight8(unsigned int w);
 576 unsigned int hweight32(unsigned int w);
 577 unsigned int hweight64(__u64 w);
 578
 579 #define BIT_MASK(nr)    (1UL << ((nr) % BITS_PER_LONG))
 580 #define BIT_WORD(nr)    ((nr) / BITS_PER_LONG)
 581
 582 static inline void set_bit(int nr, volatile unsigned long *addr)
 583 {
 584         unsigned long mask = BIT_MASK(nr);
 585         unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
 586
 587         *p  |= mask;
 588 }
 589
 590 static inline void clear_bit(int nr, volatile unsigned long *addr)
 591 {
 592         unsigned long mask = BIT_MASK(nr);
 593         unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
 594
 595         *p &= ~mask;
 596 }
 597
 598 static inline int test_bit(int nr, const volatile unsigned long *addr)
 599 {
 600         unsigned long mask = BIT_MASK(nr);
 601         unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
 602
 603         return *p & mask;
 604 }
 605
 606
 607 #endif  /* __LIBXFS_INTERNAL_XFS_H__ */