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

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _BCACHEFS_BKEY_H
   3 #define _BCACHEFS_BKEY_H
   4
   5 #include <linux/bug.h>
   6 #include "bcachefs_format.h"
   7
   8 #include "util.h"
   9 #include "vstructs.h"
  10
  11 #ifdef CONFIG_X86_64
  12 #define HAVE_BCACHEFS_COMPILED_UNPACK   1
  13 #endif
  14
  15 void bch2_to_binary(char *, const u64 *, unsigned);
  16
  17 /* bkey with split value, const */
  18 struct bkey_s_c {
  19         const struct bkey       *k;
  20         const struct bch_val    *v;
  21 };
  22
  23 /* bkey with split value */
  24 struct bkey_s {
  25         union {
  26         struct {
  27                 struct bkey     *k;
  28                 struct bch_val  *v;
  29         };
  30         struct bkey_s_c         s_c;
  31         };
  32 };
  33
  34 #define bkey_next(_k)           vstruct_next(_k)
  35
  36 static inline struct bkey_packed *bkey_next_skip_noops(struct bkey_packed *k,
  37                                                        struct bkey_packed *end)
  38 {
  39         k = bkey_next(k);
  40
  41         while (k != end && !k->u64s)
  42                 k = (void *) ((u64 *) k + 1);
  43         return k;
  44 }
  45
  46 #define bkey_val_u64s(_k)       ((_k)->u64s - BKEY_U64s)
  47
  48 static inline size_t bkey_val_bytes(const struct bkey *k)
  49 {
  50         return bkey_val_u64s(k) * sizeof(u64);
  51 }
  52
  53 static inline void set_bkey_val_u64s(struct bkey *k, unsigned val_u64s)
  54 {
  55         k->u64s = BKEY_U64s + val_u64s;
  56 }
  57
  58 static inline void set_bkey_val_bytes(struct bkey *k, unsigned bytes)
  59 {
  60         k->u64s = BKEY_U64s + DIV_ROUND_UP(bytes, sizeof(u64));
  61 }
  62
  63 #define bkey_val_end(_k)        ((void *) (((u64 *) (_k).v) + bkey_val_u64s((_k).k)))
  64
  65 #define bkey_deleted(_k)        ((_k)->type == KEY_TYPE_deleted)
  66
  67 #define bkey_whiteout(_k)                               \
  68         ((_k)->type == KEY_TYPE_deleted || (_k)->type == KEY_TYPE_discard)
  69
  70 #define bkey_packed_typecheck(_k)                                       \
  71 ({                                                                      \
  72         BUILD_BUG_ON(!type_is(_k, struct bkey *) &&                     \
  73                      !type_is(_k, struct bkey_packed *));               \
  74         type_is(_k, struct bkey_packed *);                              \
  75 })
  76
  77 enum bkey_lr_packed {
  78         BKEY_PACKED_BOTH,
  79         BKEY_PACKED_RIGHT,
  80         BKEY_PACKED_LEFT,
  81         BKEY_PACKED_NONE,
  82 };
  83
  84 #define bkey_lr_packed_typecheck(_l, _r)                                \
  85         (!bkey_packed_typecheck(_l) + ((!bkey_packed_typecheck(_r)) << 1))
  86
  87 #define bkey_lr_packed(_l, _r)                                          \
  88         ((_l)->format + ((_r)->format << 1))
  89
  90 #define bkey_copy(_dst, _src)                                   \
  91 do {                                                            \
  92         BUILD_BUG_ON(!type_is(_dst, struct bkey_i *) &&         \
  93                      !type_is(_dst, struct bkey_packed *));     \
  94         BUILD_BUG_ON(!type_is(_src, struct bkey_i *) &&         \
  95                      !type_is(_src, struct bkey_packed *));     \
  96         EBUG_ON((u64 *) (_dst) > (u64 *) (_src) &&              \
  97                 (u64 *) (_dst) < (u64 *) (_src) +               \
  98                 ((struct bkey *) (_src))->u64s);                \
  99                                                                 \
 100         memcpy_u64s_small((_dst), (_src),                       \
 101                           ((struct bkey *) (_src))->u64s);      \
 102 } while (0)
 103
 104 struct btree;
 105
 106 struct bkey_format_state {
 107         u64 field_min[BKEY_NR_FIELDS];
 108         u64 field_max[BKEY_NR_FIELDS];
 109 };
 110
 111 void bch2_bkey_format_init(struct bkey_format_state *);
 112 void bch2_bkey_format_add_key(struct bkey_format_state *, const struct bkey *);
 113 void bch2_bkey_format_add_pos(struct bkey_format_state *, struct bpos);
 114 struct bkey_format bch2_bkey_format_done(struct bkey_format_state *);
 115 const char *bch2_bkey_format_validate(struct bkey_format *);
 116
 117 __pure
 118 unsigned bch2_bkey_greatest_differing_bit(const struct btree *,
 119                                           const struct bkey_packed *,
 120                                           const struct bkey_packed *);
 121 __pure
 122 unsigned bch2_bkey_ffs(const struct btree *, const struct bkey_packed *);
 123
 124 __pure
 125 int __bch2_bkey_cmp_packed_format_checked(const struct bkey_packed *,
 126                                      const struct bkey_packed *,
 127                                      const struct btree *);
 128
 129 __pure
 130 int __bch2_bkey_cmp_left_packed_format_checked(const struct btree *,
 131                                           const struct bkey_packed *,
 132                                           const struct bpos *);
 133
 134 __pure
 135 int __bch2_bkey_cmp_packed(const struct bkey_packed *,
 136                            const struct bkey_packed *,
 137                            const struct btree *);
 138
 139 __pure
 140 int __bch2_bkey_cmp_left_packed(const struct btree *,
 141                                 const struct bkey_packed *,
 142                                 const struct bpos *);
 143
 144 static inline __pure
 145 int bkey_cmp_left_packed(const struct btree *b,
 146                          const struct bkey_packed *l, const struct bpos *r)
 147 {
 148         return __bch2_bkey_cmp_left_packed(b, l, r);
 149 }
 150
 151 /*
 152  * we prefer to pass bpos by ref, but it's often enough terribly convenient to
 153  * pass it by by val... as much as I hate c++, const ref would be nice here:
 154  */
 155 __pure __flatten
 156 static inline int bkey_cmp_left_packed_byval(const struct btree *b,
 157                                              const struct bkey_packed *l,
 158                                              struct bpos r)
 159 {
 160         return bkey_cmp_left_packed(b, l, &r);
 161 }
 162
 163 /*
 164  * If @_l or @_r are struct bkey * (not bkey_packed *), uses type information to
 165  * skip dispatching on k->format:
 166  */
 167 #define bkey_cmp_packed(_b, _l, _r)                                     \
 168 ({                                                                      \
 169         int _cmp;                                                       \
 170                                                                         \
 171         switch (bkey_lr_packed_typecheck(_l, _r)) {                     \
 172         case BKEY_PACKED_NONE:                                          \
 173                 _cmp = bkey_cmp(((struct bkey *) (_l))->p,              \
 174                                 ((struct bkey *) (_r))->p);             \
 175                 break;                                                  \
 176         case BKEY_PACKED_LEFT:                                          \
 177                 _cmp = bkey_cmp_left_packed((_b),                       \
 178                                   (struct bkey_packed *) (_l),          \
 179                                   &((struct bkey *) (_r))->p);          \
 180                 break;                                                  \
 181         case BKEY_PACKED_RIGHT:                                         \
 182                 _cmp = -bkey_cmp_left_packed((_b),                      \
 183                                   (struct bkey_packed *) (_r),          \
 184                                   &((struct bkey *) (_l))->p);          \
 185                 break;                                                  \
 186         case BKEY_PACKED_BOTH:                                          \
 187                 _cmp = __bch2_bkey_cmp_packed((void *) (_l),            \
 188                                          (void *) (_r), (_b));          \
 189                 break;                                                  \
 190         }                                                               \
 191         _cmp;                                                           \
 192 })
 193
 194 #if 1
 195 static __always_inline int bkey_cmp(struct bpos l, struct bpos r)
 196 {
 197         if (l.inode != r.inode)
 198                 return l.inode < r.inode ? -1 : 1;
 199         if (l.offset != r.offset)
 200                 return l.offset < r.offset ? -1 : 1;
 201         if (l.snapshot != r.snapshot)
 202                 return l.snapshot < r.snapshot ? -1 : 1;
 203         return 0;
 204 }
 205 #else
 206 int bkey_cmp(struct bpos l, struct bpos r);
 207 #endif
 208
 209 static inline struct bpos bpos_min(struct bpos l, struct bpos r)
 210 {
 211         return bkey_cmp(l, r) < 0 ? l : r;
 212 }
 213
 214 void bch2_bpos_swab(struct bpos *);
 215 void bch2_bkey_swab_key(const struct bkey_format *, struct bkey_packed *);
 216
 217 static __always_inline int bversion_cmp(struct bversion l, struct bversion r)
 218 {
 219         return  cmp_int(l.hi, r.hi) ?:
 220                 cmp_int(l.lo, r.lo);
 221 }
 222
 223 #define ZERO_VERSION    ((struct bversion) { .hi = 0, .lo = 0 })
 224 #define MAX_VERSION     ((struct bversion) { .hi = ~0, .lo = ~0ULL })
 225
 226 static __always_inline int bversion_zero(struct bversion v)
 227 {
 228         return !bversion_cmp(v, ZERO_VERSION);
 229 }
 230
 231 #ifdef CONFIG_BCACHEFS_DEBUG
 232 /* statement expressions confusing unlikely()? */
 233 #define bkey_packed(_k)                                                 \
 234         ({ EBUG_ON((_k)->format > KEY_FORMAT_CURRENT);                  \
 235          (_k)->format != KEY_FORMAT_CURRENT; })
 236 #else
 237 #define bkey_packed(_k)         ((_k)->format != KEY_FORMAT_CURRENT)
 238 #endif
 239
 240 /*
 241  * It's safe to treat an unpacked bkey as a packed one, but not the reverse
 242  */
 243 static inline struct bkey_packed *bkey_to_packed(struct bkey_i *k)
 244 {
 245         return (struct bkey_packed *) k;
 246 }
 247
 248 static inline const struct bkey_packed *bkey_to_packed_c(const struct bkey_i *k)
 249 {
 250         return (const struct bkey_packed *) k;
 251 }
 252
 253 static inline struct bkey_i *packed_to_bkey(struct bkey_packed *k)
 254 {
 255         return bkey_packed(k) ? NULL : (struct bkey_i *) k;
 256 }
 257
 258 static inline const struct bkey *packed_to_bkey_c(const struct bkey_packed *k)
 259 {
 260         return bkey_packed(k) ? NULL : (const struct bkey *) k;
 261 }
 262
 263 static inline unsigned bkey_format_key_bits(const struct bkey_format *format)
 264 {
 265         return format->bits_per_field[BKEY_FIELD_INODE] +
 266                 format->bits_per_field[BKEY_FIELD_OFFSET] +
 267                 format->bits_per_field[BKEY_FIELD_SNAPSHOT];
 268 }
 269
 270 static inline struct bpos bkey_successor(struct bpos p)
 271 {
 272         struct bpos ret = p;
 273
 274         if (!++ret.offset)
 275                 BUG_ON(!++ret.inode);
 276
 277         return ret;
 278 }
 279
 280 static inline struct bpos bkey_predecessor(struct bpos p)
 281 {
 282         struct bpos ret = p;
 283
 284         if (!ret.offset--)
 285                 BUG_ON(!ret.inode--);
 286
 287         return ret;
 288 }
 289
 290 static inline u64 bkey_start_offset(const struct bkey *k)
 291 {
 292         return k->p.offset - k->size;
 293 }
 294
 295 static inline struct bpos bkey_start_pos(const struct bkey *k)
 296 {
 297         return (struct bpos) {
 298                 .inode          = k->p.inode,
 299                 .offset         = bkey_start_offset(k),
 300                 .snapshot       = k->p.snapshot,
 301         };
 302 }
 303
 304 /* Packed helpers */
 305
 306 static inline unsigned bkeyp_key_u64s(const struct bkey_format *format,
 307                                       const struct bkey_packed *k)
 308 {
 309         unsigned ret = bkey_packed(k) ? format->key_u64s : BKEY_U64s;
 310
 311         EBUG_ON(k->u64s < ret);
 312         return ret;
 313 }
 314
 315 static inline unsigned bkeyp_key_bytes(const struct bkey_format *format,
 316                                        const struct bkey_packed *k)
 317 {
 318         return bkeyp_key_u64s(format, k) * sizeof(u64);
 319 }
 320
 321 static inline unsigned bkeyp_val_u64s(const struct bkey_format *format,
 322                                       const struct bkey_packed *k)
 323 {
 324         return k->u64s - bkeyp_key_u64s(format, k);
 325 }
 326
 327 static inline size_t bkeyp_val_bytes(const struct bkey_format *format,
 328                                      const struct bkey_packed *k)
 329 {
 330         return bkeyp_val_u64s(format, k) * sizeof(u64);
 331 }
 332
 333 static inline void set_bkeyp_val_u64s(const struct bkey_format *format,
 334                                       struct bkey_packed *k, unsigned val_u64s)
 335 {
 336         k->u64s = bkeyp_key_u64s(format, k) + val_u64s;
 337 }
 338
 339 #define bkeyp_val(_format, _k)                                          \
 340          ((struct bch_val *) ((_k)->_data + bkeyp_key_u64s(_format, _k)))
 341
 342 extern const struct bkey_format bch2_bkey_format_current;
 343
 344 bool bch2_bkey_transform(const struct bkey_format *,
 345                          struct bkey_packed *,
 346                          const struct bkey_format *,
 347                          const struct bkey_packed *);
 348
 349 struct bkey __bch2_bkey_unpack_key(const struct bkey_format *,
 350                                    const struct bkey_packed *);
 351
 352 #ifndef HAVE_BCACHEFS_COMPILED_UNPACK
 353 struct bpos __bkey_unpack_pos(const struct bkey_format *,
 354                               const struct bkey_packed *);
 355 #endif
 356
 357 bool bch2_bkey_pack_key(struct bkey_packed *, const struct bkey *,
 358                    const struct bkey_format *);
 359
 360 enum bkey_pack_pos_ret {
 361         BKEY_PACK_POS_EXACT,
 362         BKEY_PACK_POS_SMALLER,
 363         BKEY_PACK_POS_FAIL,
 364 };
 365
 366 enum bkey_pack_pos_ret bch2_bkey_pack_pos_lossy(struct bkey_packed *, struct bpos,
 367                                            const struct btree *);
 368
 369 static inline bool bkey_pack_pos(struct bkey_packed *out, struct bpos in,
 370                                  const struct btree *b)
 371 {
 372         return bch2_bkey_pack_pos_lossy(out, in, b) == BKEY_PACK_POS_EXACT;
 373 }
 374
 375 void bch2_bkey_unpack(const struct btree *, struct bkey_i *,
 376                  const struct bkey_packed *);
 377 bool bch2_bkey_pack(struct bkey_packed *, const struct bkey_i *,
 378                const struct bkey_format *);
 379
 380 static inline u64 bkey_field_max(const struct bkey_format *f,
 381                                  enum bch_bkey_fields nr)
 382 {
 383         return f->bits_per_field[nr] < 64
 384                 ? (le64_to_cpu(f->field_offset[nr]) +
 385                    ~(~0ULL << f->bits_per_field[nr]))
 386                 : U64_MAX;
 387 }
 388
 389 #ifdef HAVE_BCACHEFS_COMPILED_UNPACK
 390
 391 int bch2_compile_bkey_format(const struct bkey_format *, void *);
 392
 393 #else
 394
 395 static inline int bch2_compile_bkey_format(const struct bkey_format *format,
 396                                           void *out) { return 0; }
 397
 398 #endif
 399
 400 static inline void bkey_reassemble(struct bkey_i *dst,
 401                                    struct bkey_s_c src)
 402 {
 403         dst->k = *src.k;
 404         memcpy_u64s_small(&dst->v, src.v, bkey_val_u64s(src.k));
 405 }
 406
 407 #define bkey_s_null             ((struct bkey_s)   { .k = NULL })
 408 #define bkey_s_c_null           ((struct bkey_s_c) { .k = NULL })
 409
 410 #define bkey_s_err(err)         ((struct bkey_s)   { .k = ERR_PTR(err) })
 411 #define bkey_s_c_err(err)       ((struct bkey_s_c) { .k = ERR_PTR(err) })
 412
 413 static inline struct bkey_s bkey_to_s(struct bkey *k)
 414 {
 415         return (struct bkey_s) { .k = k, .v = NULL };
 416 }
 417
 418 static inline struct bkey_s_c bkey_to_s_c(const struct bkey *k)
 419 {
 420         return (struct bkey_s_c) { .k = k, .v = NULL };
 421 }
 422
 423 static inline struct bkey_s bkey_i_to_s(struct bkey_i *k)
 424 {
 425         return (struct bkey_s) { .k = &k->k, .v = &k->v };
 426 }
 427
 428 static inline struct bkey_s_c bkey_i_to_s_c(const struct bkey_i *k)
 429 {
 430         return (struct bkey_s_c) { .k = &k->k, .v = &k->v };
 431 }
 432
 433 /*
 434  * For a given type of value (e.g. struct bch_extent), generates the types for
 435  * bkey + bch_extent - inline, split, split const - and also all the conversion
 436  * functions, which also check that the value is of the correct type.
 437  *
 438  * We use anonymous unions for upcasting - e.g. converting from e.g. a
 439  * bkey_i_extent to a bkey_i - since that's always safe, instead of conversion
 440  * functions.
 441  */
 442 #define BKEY_VAL_ACCESSORS(name)                                        \
 443 struct bkey_i_##name {                                                  \
 444         union {                                                         \
 445                 struct bkey             k;                              \
 446                 struct bkey_i           k_i;                            \
 447         };                                                              \
 448         struct bch_##name               v;                              \
 449 };                                                                      \
 450                                                                         \
 451 struct bkey_s_c_##name {                                                \
 452         union {                                                         \
 453         struct {                                                        \
 454                 const struct bkey       *k;                             \
 455                 const struct bch_##name *v;                             \
 456         };                                                              \
 457         struct bkey_s_c                 s_c;                            \
 458         };                                                              \
 459 };                                                                      \
 460                                                                         \
 461 struct bkey_s_##name {                                                  \
 462         union {                                                         \
 463         struct {                                                        \
 464                 struct bkey             *k;                             \
 465                 struct bch_##name       *v;                             \
 466         };                                                              \
 467         struct bkey_s_c_##name          c;                              \
 468         struct bkey_s                   s;                              \
 469         struct bkey_s_c                 s_c;                            \
 470         };                                                              \
 471 };                                                                      \
 472                                                                         \
 473 static inline struct bkey_i_##name *bkey_i_to_##name(struct bkey_i *k)  \
 474 {                                                                       \
 475         EBUG_ON(k->k.type != KEY_TYPE_##name);                          \
 476         return container_of(&k->k, struct bkey_i_##name, k);            \
 477 }                                                                       \
 478                                                                         \
 479 static inline const struct bkey_i_##name *                              \
 480 bkey_i_to_##name##_c(const struct bkey_i *k)                            \
 481 {                                                                       \
 482         EBUG_ON(k->k.type != KEY_TYPE_##name);                          \
 483         return container_of(&k->k, struct bkey_i_##name, k);            \
 484 }                                                                       \
 485                                                                         \
 486 static inline struct bkey_s_##name bkey_s_to_##name(struct bkey_s k)    \
 487 {                                                                       \
 488         EBUG_ON(k.k->type != KEY_TYPE_##name);                          \
 489         return (struct bkey_s_##name) {                                 \
 490                 .k = k.k,                                               \
 491                 .v = container_of(k.v, struct bch_##name, v),           \
 492         };                                                              \
 493 }                                                                       \
 494                                                                         \
 495 static inline struct bkey_s_c_##name bkey_s_c_to_##name(struct bkey_s_c k)\
 496 {                                                                       \
 497         EBUG_ON(k.k->type != KEY_TYPE_##name);                          \
 498         return (struct bkey_s_c_##name) {                               \
 499                 .k = k.k,                                               \
 500                 .v = container_of(k.v, struct bch_##name, v),           \
 501         };                                                              \
 502 }                                                                       \
 503                                                                         \
 504 static inline struct bkey_s_##name name##_i_to_s(struct bkey_i_##name *k)\
 505 {                                                                       \
 506         return (struct bkey_s_##name) {                                 \
 507                 .k = &k->k,                                             \
 508                 .v = &k->v,                                             \
 509         };                                                              \
 510 }                                                                       \
 511                                                                         \
 512 static inline struct bkey_s_c_##name                                    \
 513 name##_i_to_s_c(const struct bkey_i_##name *k)                          \
 514 {                                                                       \
 515         return (struct bkey_s_c_##name) {                               \
 516                 .k = &k->k,                                             \
 517                 .v = &k->v,                                             \
 518         };                                                              \
 519 }                                                                       \
 520                                                                         \
 521 static inline struct bkey_s_##name bkey_i_to_s_##name(struct bkey_i *k) \
 522 {                                                                       \
 523         EBUG_ON(k->k.type != KEY_TYPE_##name);                          \
 524         return (struct bkey_s_##name) {                                 \
 525                 .k = &k->k,                                             \
 526                 .v = container_of(&k->v, struct bch_##name, v),         \
 527         };                                                              \
 528 }                                                                       \
 529                                                                         \
 530 static inline struct bkey_s_c_##name                                    \
 531 bkey_i_to_s_c_##name(const struct bkey_i *k)                            \
 532 {                                                                       \
 533         EBUG_ON(k->k.type != KEY_TYPE_##name);                          \
 534         return (struct bkey_s_c_##name) {                               \
 535                 .k = &k->k,                                             \
 536                 .v = container_of(&k->v, struct bch_##name, v),         \
 537         };                                                              \
 538 }                                                                       \
 539                                                                         \
 540 static inline struct bkey_i_##name *bkey_##name##_init(struct bkey_i *_k)\
 541 {                                                                       \
 542         struct bkey_i_##name *k =                                       \
 543                 container_of(&_k->k, struct bkey_i_##name, k);          \
 544                                                                         \
 545         bkey_init(&k->k);                                               \
 546         memset(&k->v, 0, sizeof(k->v));                                 \
 547         k->k.type = KEY_TYPE_##name;                                    \
 548         set_bkey_val_bytes(&k->k, sizeof(k->v));                        \
 549                                                                         \
 550         return k;                                                       \
 551 }
 552
 553 BKEY_VAL_ACCESSORS(cookie);
 554 BKEY_VAL_ACCESSORS(btree_ptr);
 555 BKEY_VAL_ACCESSORS(extent);
 556 BKEY_VAL_ACCESSORS(reservation);
 557 BKEY_VAL_ACCESSORS(inode);
 558 BKEY_VAL_ACCESSORS(inode_generation);
 559 BKEY_VAL_ACCESSORS(dirent);
 560 BKEY_VAL_ACCESSORS(xattr);
 561 BKEY_VAL_ACCESSORS(alloc);
 562 BKEY_VAL_ACCESSORS(quota);
 563 BKEY_VAL_ACCESSORS(stripe);
 564 BKEY_VAL_ACCESSORS(reflink_p);
 565 BKEY_VAL_ACCESSORS(reflink_v);
 566 BKEY_VAL_ACCESSORS(inline_data);
 567 BKEY_VAL_ACCESSORS(btree_ptr_v2);
 568 BKEY_VAL_ACCESSORS(indirect_inline_data);
 569
 570 /* byte order helpers */
 571
 572 #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
 573
 574 static inline unsigned high_word_offset(const struct bkey_format *f)
 575 {
 576         return f->key_u64s - 1;
 577 }
 578
 579 #define high_bit_offset         0
 580 #define nth_word(p, n)          ((p) - (n))
 581
 582 #elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
 583
 584 static inline unsigned high_word_offset(const struct bkey_format *f)
 585 {
 586         return 0;
 587 }
 588
 589 #define high_bit_offset         KEY_PACKED_BITS_START
 590 #define nth_word(p, n)          ((p) + (n))
 591
 592 #else
 593 #error edit for your odd byteorder.
 594 #endif
 595
 596 #define high_word(f, k)         ((k)->_data + high_word_offset(f))
 597 #define next_word(p)            nth_word(p, 1)
 598 #define prev_word(p)            nth_word(p, -1)
 599
 600 #ifdef CONFIG_BCACHEFS_DEBUG
 601 void bch2_bkey_pack_test(void);
 602 #else
 603 static inline void bch2_bkey_pack_test(void) {}
 604 #endif
 605
 606 #endif /* _BCACHEFS_BKEY_H */