git.sesse.net Git - bcachefs-tools-debian/blob - libbcachefs/bkey.h

   1 #ifndef _BCACHEFS_BKEY_H
   2 #define _BCACHEFS_BKEY_H
   3
   4 #include <linux/bug.h>
   5 #include "bcachefs_format.h"
   6
   7 #include "util.h"
   8 #include "vstructs.h"
   9
  10 void bch2_to_binary(char *, const u64 *, unsigned);
  11 int bch2_bkey_to_text(char *, size_t, const struct bkey *);
  12
  13 #define BKEY_PADDED(key)        __BKEY_PADDED(key, BKEY_EXTENT_VAL_U64s_MAX)
  14
  15 /* bkey with split value, const */
  16 struct bkey_s_c {
  17         const struct bkey       *k;
  18         const struct bch_val    *v;
  19 };
  20
  21 /* bkey with split value */
  22 struct bkey_s {
  23         union {
  24         struct {
  25                 struct bkey     *k;
  26                 struct bch_val  *v;
  27         };
  28         struct bkey_s_c         s_c;
  29         };
  30 };
  31
  32 #define bkey_next(_k)           vstruct_next(_k)
  33
  34 static inline unsigned bkey_val_u64s(const struct bkey *k)
  35 {
  36         return k->u64s - BKEY_U64s;
  37 }
  38
  39 static inline size_t bkey_val_bytes(const struct bkey *k)
  40 {
  41         return bkey_val_u64s(k) * sizeof(u64);
  42 }
  43
  44 static inline void set_bkey_val_u64s(struct bkey *k, unsigned val_u64s)
  45 {
  46         k->u64s = BKEY_U64s + val_u64s;
  47 }
  48
  49 static inline void set_bkey_val_bytes(struct bkey *k, unsigned bytes)
  50 {
  51         k->u64s = BKEY_U64s + DIV_ROUND_UP(bytes, sizeof(u64));
  52 }
  53
  54 /*
  55  * Mark a key as deleted without changing the size of the value (i.e. modifying
  56  * keys in the btree in place)
  57  */
  58 static inline void __set_bkey_deleted(struct bkey *k)
  59 {
  60         k->type = KEY_TYPE_DELETED;
  61 }
  62
  63 static inline void set_bkey_deleted(struct bkey *k)
  64 {
  65         __set_bkey_deleted(k);
  66         set_bkey_val_u64s(k, 0);
  67 }
  68
  69 #define bkey_deleted(_k)        ((_k)->type == KEY_TYPE_DELETED)
  70
  71 #define bkey_whiteout(_k)                               \
  72         ((_k)->type == KEY_TYPE_DELETED || (_k)->type == KEY_TYPE_DISCARD)
  73
  74 #define bkey_packed_typecheck(_k)                                       \
  75 ({                                                                      \
  76         BUILD_BUG_ON(!type_is(_k, struct bkey *) &&                     \
  77                      !type_is(_k, struct bkey_packed *));               \
  78         type_is(_k, struct bkey_packed *);                              \
  79 })
  80
  81 enum bkey_lr_packed {
  82         BKEY_PACKED_BOTH,
  83         BKEY_PACKED_RIGHT,
  84         BKEY_PACKED_LEFT,
  85         BKEY_PACKED_NONE,
  86 };
  87
  88 #define bkey_lr_packed_typecheck(_l, _r)                                \
  89         (!bkey_packed_typecheck(_l) + ((!bkey_packed_typecheck(_r)) << 1))
  90
  91 #define bkey_lr_packed(_l, _r)                                          \
  92         ((_l)->format + ((_r)->format << 1))
  93
  94 #define bkey_copy(_dst, _src)                                   \
  95 do {                                                            \
  96         BUILD_BUG_ON(!type_is(_dst, struct bkey_i *) &&         \
  97                      !type_is(_dst, struct bkey_packed *));     \
  98         BUILD_BUG_ON(!type_is(_src, struct bkey_i *) &&         \
  99                      !type_is(_src, struct bkey_packed *));     \
 100         EBUG_ON((u64 *) (_dst) > (u64 *) (_src) &&              \
 101                 (u64 *) (_dst) < (u64 *) (_src) +               \
 102                 ((struct bkey *) (_src))->u64s);                \
 103                                                                 \
 104         __memmove_u64s_down((_dst), (_src),                     \
 105                             ((struct bkey *) (_src))->u64s);    \
 106 } while (0)
 107
 108 struct btree;
 109
 110 struct bkey_format_state {
 111         u64 field_min[BKEY_NR_FIELDS];
 112         u64 field_max[BKEY_NR_FIELDS];
 113 };
 114
 115 void bch2_bkey_format_init(struct bkey_format_state *);
 116 void bch2_bkey_format_add_key(struct bkey_format_state *, const struct bkey *);
 117 void bch2_bkey_format_add_pos(struct bkey_format_state *, struct bpos);
 118 struct bkey_format bch2_bkey_format_done(struct bkey_format_state *);
 119 const char *bch2_bkey_format_validate(struct bkey_format *);
 120
 121 __pure
 122 unsigned bch2_bkey_greatest_differing_bit(const struct btree *,
 123                                           const struct bkey_packed *,
 124                                           const struct bkey_packed *);
 125 __pure
 126 unsigned bch2_bkey_ffs(const struct btree *, const struct bkey_packed *);
 127
 128 __pure
 129 int __bch2_bkey_cmp_packed_format_checked(const struct bkey_packed *,
 130                                      const struct bkey_packed *,
 131                                      const struct btree *);
 132
 133 __pure
 134 int __bch2_bkey_cmp_left_packed_format_checked(const struct btree *,
 135                                           const struct bkey_packed *,
 136                                           const struct bpos *);
 137
 138 __pure
 139 int __bch2_bkey_cmp_packed(const struct bkey_packed *,
 140                            const struct bkey_packed *,
 141                            const struct btree *);
 142
 143 __pure
 144 int __bch2_bkey_cmp_left_packed(const struct btree *,
 145                                 const struct bkey_packed *,
 146                                 const struct bpos *);
 147
 148 static inline __pure
 149 int bkey_cmp_left_packed(const struct btree *b,
 150                          const struct bkey_packed *l, const struct bpos *r)
 151 {
 152         return __bch2_bkey_cmp_left_packed(b, l, r);
 153 }
 154
 155 /*
 156  * we prefer to pass bpos by ref, but it's often enough terribly convenient to
 157  * pass it by by val... as much as I hate c++, const ref would be nice here:
 158  */
 159 __pure __flatten
 160 static inline int bkey_cmp_left_packed_byval(const struct btree *b,
 161                                              const struct bkey_packed *l,
 162                                              struct bpos r)
 163 {
 164         return bkey_cmp_left_packed(b, l, &r);
 165 }
 166
 167 /*
 168  * If @_l or @_r are struct bkey * (not bkey_packed *), uses type information to
 169  * skip dispatching on k->format:
 170  */
 171 #define bkey_cmp_packed(_b, _l, _r)                                     \
 172 ({                                                                      \
 173         int _cmp;                                                       \
 174                                                                         \
 175         switch (bkey_lr_packed_typecheck(_l, _r)) {                     \
 176         case BKEY_PACKED_NONE:                                          \
 177                 _cmp = bkey_cmp(((struct bkey *) (_l))->p,              \
 178                                 ((struct bkey *) (_r))->p);             \
 179                 break;                                                  \
 180         case BKEY_PACKED_LEFT:                                          \
 181                 _cmp = bkey_cmp_left_packed((_b),                       \
 182                                   (struct bkey_packed *) (_l),          \
 183                                   &((struct bkey *) (_r))->p);          \
 184                 break;                                                  \
 185         case BKEY_PACKED_RIGHT:                                         \
 186                 _cmp = -bkey_cmp_left_packed((_b),                      \
 187                                   (struct bkey_packed *) (_r),          \
 188                                   &((struct bkey *) (_l))->p);          \
 189                 break;                                                  \
 190         case BKEY_PACKED_BOTH:                                          \
 191                 _cmp = __bch2_bkey_cmp_packed((void *) (_l),            \
 192                                          (void *) (_r), (_b));          \
 193                 break;                                                  \
 194         }                                                               \
 195         _cmp;                                                           \
 196 })
 197
 198 #if 1
 199 static __always_inline int bkey_cmp(struct bpos l, struct bpos r)
 200 {
 201         if (l.inode != r.inode)
 202                 return l.inode < r.inode ? -1 : 1;
 203         if (l.offset != r.offset)
 204                 return l.offset < r.offset ? -1 : 1;
 205         if (l.snapshot != r.snapshot)
 206                 return l.snapshot < r.snapshot ? -1 : 1;
 207         return 0;
 208 }
 209 #else
 210 int bkey_cmp(struct bpos l, struct bpos r);
 211 #endif
 212
 213 static inline struct bpos bpos_min(struct bpos l, struct bpos r)
 214 {
 215         return bkey_cmp(l, r) < 0 ? l : r;
 216 }
 217
 218 void bch2_bpos_swab(struct bpos *);
 219 void bch2_bkey_swab_key(const struct bkey_format *, struct bkey_packed *);
 220
 221 static __always_inline int bversion_cmp(struct bversion l, struct bversion r)
 222 {
 223         if (l.hi != r.hi)
 224                 return l.hi < r.hi ? -1 : 1;
 225         if (l.lo != r.lo)
 226                 return l.lo < r.lo ? -1 : 1;
 227         return 0;
 228 }
 229
 230 #define ZERO_VERSION    ((struct bversion) { .hi = 0, .lo = 0 })
 231
 232 static __always_inline int bversion_zero(struct bversion v)
 233 {
 234         return !bversion_cmp(v, ZERO_VERSION);
 235 }
 236
 237 #ifdef CONFIG_BCACHEFS_DEBUG
 238 /* statement expressions confusing unlikely()? */
 239 #define bkey_packed(_k)                                                 \
 240         ({ EBUG_ON((_k)->format > KEY_FORMAT_CURRENT);                  \
 241          (_k)->format != KEY_FORMAT_CURRENT; })
 242 #else
 243 #define bkey_packed(_k)         ((_k)->format != KEY_FORMAT_CURRENT)
 244 #endif
 245
 246 /*
 247  * It's safe to treat an unpacked bkey as a packed one, but not the reverse
 248  */
 249 static inline struct bkey_packed *bkey_to_packed(struct bkey_i *k)
 250 {
 251         return (struct bkey_packed *) k;
 252 }
 253
 254 static inline const struct bkey_packed *bkey_to_packed_c(const struct bkey_i *k)
 255 {
 256         return (const struct bkey_packed *) k;
 257 }
 258
 259 static inline struct bkey_i *packed_to_bkey(struct bkey_packed *k)
 260 {
 261         return bkey_packed(k) ? NULL : (struct bkey_i *) k;
 262 }
 263
 264 static inline const struct bkey *packed_to_bkey_c(const struct bkey_packed *k)
 265 {
 266         return bkey_packed(k) ? NULL : (const struct bkey *) k;
 267 }
 268
 269 static inline unsigned bkey_format_key_bits(const struct bkey_format *format)
 270 {
 271         return format->bits_per_field[BKEY_FIELD_INODE] +
 272                 format->bits_per_field[BKEY_FIELD_OFFSET] +
 273                 format->bits_per_field[BKEY_FIELD_SNAPSHOT];
 274 }
 275
 276 static inline struct bpos bkey_successor(struct bpos p)
 277 {
 278         struct bpos ret = p;
 279
 280         if (!++ret.offset)
 281                 BUG_ON(!++ret.inode);
 282
 283         return ret;
 284 }
 285
 286 static inline u64 bkey_start_offset(const struct bkey *k)
 287 {
 288         return k->p.offset - k->size;
 289 }
 290
 291 static inline struct bpos bkey_start_pos(const struct bkey *k)
 292 {
 293         return (struct bpos) {
 294                 .inode          = k->p.inode,
 295                 .offset         = bkey_start_offset(k),
 296                 .snapshot       = k->p.snapshot,
 297         };
 298 }
 299
 300 /* Packed helpers */
 301
 302 static inline unsigned bkeyp_key_u64s(const struct bkey_format *format,
 303                                       const struct bkey_packed *k)
 304 {
 305         unsigned ret = bkey_packed(k) ? format->key_u64s : BKEY_U64s;
 306
 307         EBUG_ON(k->u64s < ret);
 308         return ret;
 309 }
 310
 311 static inline unsigned bkeyp_key_bytes(const struct bkey_format *format,
 312                                        const struct bkey_packed *k)
 313 {
 314         return bkeyp_key_u64s(format, k) * sizeof(u64);
 315 }
 316
 317 static inline unsigned bkeyp_val_u64s(const struct bkey_format *format,
 318                                       const struct bkey_packed *k)
 319 {
 320         return k->u64s - bkeyp_key_u64s(format, k);
 321 }
 322
 323 static inline size_t bkeyp_val_bytes(const struct bkey_format *format,
 324                                      const struct bkey_packed *k)
 325 {
 326         return bkeyp_val_u64s(format, k) * sizeof(u64);
 327 }
 328
 329 static inline void set_bkeyp_val_u64s(const struct bkey_format *format,
 330                                       struct bkey_packed *k, unsigned val_u64s)
 331 {
 332         k->u64s = bkeyp_key_u64s(format, k) + val_u64s;
 333 }
 334
 335 #define bkeyp_val(_format, _k)                                          \
 336          ((struct bch_val *) ((_k)->_data + bkeyp_key_u64s(_format, _k)))
 337
 338 extern const struct bkey_format bch2_bkey_format_current;
 339
 340 bool bch2_bkey_transform(const struct bkey_format *,
 341                          struct bkey_packed *,
 342                          const struct bkey_format *,
 343                          const struct bkey_packed *);
 344
 345 struct bkey __bch2_bkey_unpack_key(const struct bkey_format *,
 346                                    const struct bkey_packed *);
 347
 348 #ifndef HAVE_BCACHEFS_COMPILED_UNPACK
 349 struct bpos __bkey_unpack_pos(const struct bkey_format *,
 350                               const struct bkey_packed *);
 351 #endif
 352
 353 bool bch2_bkey_pack_key(struct bkey_packed *, const struct bkey *,
 354                    const struct bkey_format *);
 355
 356 enum bkey_pack_pos_ret {
 357         BKEY_PACK_POS_EXACT,
 358         BKEY_PACK_POS_SMALLER,
 359         BKEY_PACK_POS_FAIL,
 360 };
 361
 362 enum bkey_pack_pos_ret bch2_bkey_pack_pos_lossy(struct bkey_packed *, struct bpos,
 363                                            const struct btree *);
 364
 365 static inline bool bkey_pack_pos(struct bkey_packed *out, struct bpos in,
 366                                  const struct btree *b)
 367 {
 368         return bch2_bkey_pack_pos_lossy(out, in, b) == BKEY_PACK_POS_EXACT;
 369 }
 370
 371 void bch2_bkey_unpack(const struct btree *, struct bkey_i *,
 372                  const struct bkey_packed *);
 373 bool bch2_bkey_pack(struct bkey_packed *, const struct bkey_i *,
 374                const struct bkey_format *);
 375
 376 static inline u64 bkey_field_max(const struct bkey_format *f,
 377                                  enum bch_bkey_fields nr)
 378 {
 379         return f->bits_per_field[nr] < 64
 380                 ? f->field_offset[nr] + ~(~0ULL << f->bits_per_field[nr])
 381                 : U64_MAX;
 382 }
 383
 384 #ifdef CONFIG_X86_64
 385 #define HAVE_BCACHEFS_COMPILED_UNPACK   1
 386
 387 int bch2_compile_bkey_format(const struct bkey_format *, void *);
 388
 389 #else
 390
 391 static inline int bch2_compile_bkey_format(const struct bkey_format *format,
 392                                           void *out) { return 0; }
 393
 394 #endif
 395
 396 static inline void bkey_reassemble(struct bkey_i *dst,
 397                                    struct bkey_s_c src)
 398 {
 399         BUG_ON(bkey_packed(src.k));
 400         dst->k = *src.k;
 401         memcpy_u64s(&dst->v, src.v, bkey_val_u64s(src.k));
 402 }
 403
 404 #define bkey_s_null             ((struct bkey_s)   { .k = NULL })
 405 #define bkey_s_c_null           ((struct bkey_s_c) { .k = NULL })
 406
 407 #define bkey_s_err(err)         ((struct bkey_s)   { .k = ERR_PTR(err) })
 408 #define bkey_s_c_err(err)       ((struct bkey_s_c) { .k = ERR_PTR(err) })
 409
 410 static inline struct bkey_s bkey_to_s(struct bkey *k)
 411 {
 412         return (struct bkey_s) { .k = k, .v = NULL };
 413 }
 414
 415 static inline struct bkey_s_c bkey_to_s_c(const struct bkey *k)
 416 {
 417         return (struct bkey_s_c) { .k = k, .v = NULL };
 418 }
 419
 420 static inline struct bkey_s bkey_i_to_s(struct bkey_i *k)
 421 {
 422         return (struct bkey_s) { .k = &k->k, .v = &k->v };
 423 }
 424
 425 static inline struct bkey_s_c bkey_i_to_s_c(const struct bkey_i *k)
 426 {
 427         return (struct bkey_s_c) { .k = &k->k, .v = &k->v };
 428 }
 429
 430 /*
 431  * For a given type of value (e.g. struct bch_extent), generates the types for
 432  * bkey + bch_extent - inline, split, split const - and also all the conversion
 433  * functions, which also check that the value is of the correct type.
 434  *
 435  * We use anonymous unions for upcasting - e.g. converting from e.g. a
 436  * bkey_i_extent to a bkey_i - since that's always safe, instead of conversion
 437  * functions.
 438  */
 439 #define __BKEY_VAL_ACCESSORS(name, nr, _assert)                         \
 440 struct bkey_s_c_##name {                                                \
 441         union {                                                         \
 442         struct {                                                        \
 443                 const struct bkey       *k;                             \
 444                 const struct bch_##name *v;                             \
 445         };                                                              \
 446         struct bkey_s_c                 s_c;                            \
 447         };                                                              \
 448 };                                                                      \
 449                                                                         \
 450 struct bkey_s_##name {                                                  \
 451         union {                                                         \
 452         struct {                                                        \
 453                 struct bkey             *k;                             \
 454                 struct bch_##name       *v;                             \
 455         };                                                              \
 456         struct bkey_s_c_##name          c;                              \
 457         struct bkey_s                   s;                              \
 458         struct bkey_s_c                 s_c;                            \
 459         };                                                              \
 460 };                                                                      \
 461                                                                         \
 462 static inline struct bkey_i_##name *bkey_i_to_##name(struct bkey_i *k)  \
 463 {                                                                       \
 464         _assert(k->k.type, nr);                                         \
 465         return container_of(&k->k, struct bkey_i_##name, k);            \
 466 }                                                                       \
 467                                                                         \
 468 static inline const struct bkey_i_##name *                              \
 469 bkey_i_to_##name##_c(const struct bkey_i *k)                            \
 470 {                                                                       \
 471         _assert(k->k.type, nr);                                         \
 472         return container_of(&k->k, struct bkey_i_##name, k);            \
 473 }                                                                       \
 474                                                                         \
 475 static inline struct bkey_s_##name bkey_s_to_##name(struct bkey_s k)    \
 476 {                                                                       \
 477         _assert(k.k->type, nr);                                         \
 478         return (struct bkey_s_##name) {                                 \
 479                 .k = k.k,                                               \
 480                 .v = container_of(k.v, struct bch_##name, v),           \
 481         };                                                              \
 482 }                                                                       \
 483                                                                         \
 484 static inline struct bkey_s_c_##name bkey_s_c_to_##name(struct bkey_s_c k)\
 485 {                                                                       \
 486         _assert(k.k->type, nr);                                         \
 487         return (struct bkey_s_c_##name) {                               \
 488                 .k = k.k,                                               \
 489                 .v = container_of(k.v, struct bch_##name, v),           \
 490         };                                                              \
 491 }                                                                       \
 492                                                                         \
 493 static inline struct bkey_s_##name name##_i_to_s(struct bkey_i_##name *k)\
 494 {                                                                       \
 495         return (struct bkey_s_##name) {                                 \
 496                 .k = &k->k,                                             \
 497                 .v = &k->v,                                             \
 498         };                                                              \
 499 }                                                                       \
 500                                                                         \
 501 static inline struct bkey_s_c_##name                                    \
 502 name##_i_to_s_c(const struct bkey_i_##name *k)                          \
 503 {                                                                       \
 504         return (struct bkey_s_c_##name) {                               \
 505                 .k = &k->k,                                             \
 506                 .v = &k->v,                                             \
 507         };                                                              \
 508 }                                                                       \
 509                                                                         \
 510 static inline struct bkey_s_##name bkey_i_to_s_##name(struct bkey_i *k) \
 511 {                                                                       \
 512         _assert(k->k.type, nr);                                         \
 513         return (struct bkey_s_##name) {                                 \
 514                 .k = &k->k,                                             \
 515                 .v = container_of(&k->v, struct bch_##name, v),         \
 516         };                                                              \
 517 }                                                                       \
 518                                                                         \
 519 static inline struct bkey_s_c_##name                                    \
 520 bkey_i_to_s_c_##name(const struct bkey_i *k)                            \
 521 {                                                                       \
 522         _assert(k->k.type, nr);                                         \
 523         return (struct bkey_s_c_##name) {                               \
 524                 .k = &k->k,                                             \
 525                 .v = container_of(&k->v, struct bch_##name, v),         \
 526         };                                                              \
 527 }                                                                       \
 528                                                                         \
 529 static inline struct bch_##name *                                       \
 530 bkey_p_##name##_val(const struct bkey_format *f,                        \
 531                     struct bkey_packed *k)                              \
 532 {                                                                       \
 533         return container_of(bkeyp_val(f, k), struct bch_##name, v);     \
 534 }                                                                       \
 535                                                                         \
 536 static inline const struct bch_##name *                                 \
 537 bkey_p_c_##name##_val(const struct bkey_format *f,                      \
 538                       const struct bkey_packed *k)                      \
 539 {                                                                       \
 540         return container_of(bkeyp_val(f, k), struct bch_##name, v);     \
 541 }                                                                       \
 542                                                                         \
 543 static inline struct bkey_i_##name *bkey_##name##_init(struct bkey_i *_k)\
 544 {                                                                       \
 545         struct bkey_i_##name *k =                                       \
 546                 container_of(&_k->k, struct bkey_i_##name, k);          \
 547                                                                         \
 548         bkey_init(&k->k);                                               \
 549         memset(&k->v, 0, sizeof(k->v));                                 \
 550         k->k.type = nr;                                                 \
 551         set_bkey_val_bytes(&k->k, sizeof(k->v));                        \
 552                                                                         \
 553         return k;                                                       \
 554 }
 555
 556 #define __BKEY_VAL_ASSERT(_type, _nr)   EBUG_ON(_type != _nr)
 557
 558 #define BKEY_VAL_ACCESSORS(name, _nr)                                   \
 559         static inline void __bch_##name##_assert(u8 type, u8 nr)        \
 560         {                                                               \
 561                 EBUG_ON(type != _nr);                                   \
 562         }                                                               \
 563                                                                         \
 564         __BKEY_VAL_ACCESSORS(name, _nr, __bch_##name##_assert)
 565
 566 BKEY_VAL_ACCESSORS(cookie,              KEY_TYPE_COOKIE);
 567
 568 static inline void __bch2_extent_assert(u8 type, u8 nr)
 569 {
 570         EBUG_ON(type != BCH_EXTENT && type != BCH_EXTENT_CACHED);
 571 }
 572
 573 __BKEY_VAL_ACCESSORS(extent,            BCH_EXTENT, __bch2_extent_assert);
 574 BKEY_VAL_ACCESSORS(reservation,         BCH_RESERVATION);
 575
 576 BKEY_VAL_ACCESSORS(inode,               BCH_INODE_FS);
 577 BKEY_VAL_ACCESSORS(inode_blockdev,      BCH_INODE_BLOCKDEV);
 578 BKEY_VAL_ACCESSORS(inode_generation,    BCH_INODE_GENERATION);
 579
 580 BKEY_VAL_ACCESSORS(dirent,              BCH_DIRENT);
 581
 582 BKEY_VAL_ACCESSORS(xattr,               BCH_XATTR);
 583
 584 BKEY_VAL_ACCESSORS(alloc,               BCH_ALLOC);
 585
 586 /* byte order helpers */
 587
 588 #if !defined(__LITTLE_ENDIAN) && !defined(__BIG_ENDIAN)
 589 #error edit for your odd byteorder.
 590 #endif
 591
 592 #ifdef __LITTLE_ENDIAN
 593
 594 #define high_bit_offset         0
 595 #define __high_word(u64s, k)    ((k)->_data + (u64s) - 1)
 596 #define nth_word(p, n)          ((p) - (n))
 597
 598 #else
 599
 600 #define high_bit_offset         KEY_PACKED_BITS_START
 601 #define __high_word(u64s, k)    ((k)->_data)
 602 #define nth_word(p, n)          ((p) + (n))
 603
 604 #endif
 605
 606 #define high_word(format, k)    __high_word((format)->key_u64s, k)
 607 #define next_word(p)            nth_word(p, 1)
 608 #define prev_word(p)            nth_word(p, -1)
 609
 610 #ifdef CONFIG_BCACHEFS_DEBUG
 611 void bch2_bkey_pack_test(void);
 612 #else
 613 static inline void bch2_bkey_pack_test(void) {}
 614 #endif
 615
 616 #endif /* _BCACHEFS_BKEY_H */