1 // SPDX-License-Identifier: GPL-2.0 2 3 #include "bcachefs.h" 4 #include "backpointers.h" 5 #include "bkey_methods.h" 6 #include "btree_cache.h" 7 #include "btree_types.h" 8 #include "alloc_background.h" 9 #include "dirent.h" 10 #include "ec.h" 11 #include "error.h" 12 #include "extents.h" 13 #include "inode.h" 14 #include "io_misc.h" 15 #include "lru.h" 16 #include "quota.h" 17 #include "reflink.h" 18 #include "snapshot.h" 19 #include "subvolume.h" 20 #include "xattr.h" 21 22 const char * const bch2_bkey_types[] = { 23 #define x(name, nr) #name, 24 BCH_BKEY_TYPES() 25 #undef x 26 NULL 27 }; 28 29 static int deleted_key_invalid(struct bch_fs *c, struct bkey_s_c k, 30 enum bkey_invalid_flags flags, struct printbuf *err) 31 { 32 return 0; 33 } 34 35 #define bch2_bkey_ops_deleted ((struct bkey_ops) { \ 36 .key_invalid = deleted_key_invalid, \ 37 }) 38 39 #define bch2_bkey_ops_whiteout ((struct bkey_ops) { \ 40 .key_invalid = deleted_key_invalid, \ 41 }) 42 43 static int empty_val_key_invalid(struct bch_fs *c, struct bkey_s_c k, 44 enum bkey_invalid_flags flags, struct printbuf *err) 45 { 46 int ret = 0; 47 48 bkey_fsck_err_on(bkey_val_bytes(k.k), c, err, 49 bkey_val_size_nonzero, 50 "incorrect value size (%zu != 0)", 51 bkey_val_bytes(k.k)); 52 fsck_err: 53 return ret; 54 } 55 56 #define bch2_bkey_ops_error ((struct bkey_ops) { \ 57 .key_invalid = empty_val_key_invalid, \ 58 }) 59 60 static int key_type_cookie_invalid(struct bch_fs *c, struct bkey_s_c k, 61 enum bkey_invalid_flags flags, struct printbuf *err) 62 { 63 return 0; 64 } 65 66 static void key_type_cookie_to_text(struct printbuf *out, struct bch_fs *c, 67 struct bkey_s_c k) 68 { 69 struct bkey_s_c_cookie ck = bkey_s_c_to_cookie(k); 70 71 prt_printf(out, "%llu", le64_to_cpu(ck.v->cookie)); 72 } 73 74 #define bch2_bkey_ops_cookie ((struct bkey_ops) { \ 75 .key_invalid = key_type_cookie_invalid, \ 76 .val_to_text = key_type_cookie_to_text, \ 77 .min_val_size = 8, \ 78 }) 79 80 #define bch2_bkey_ops_hash_whiteout ((struct bkey_ops) {\ 81 .key_invalid = empty_val_key_invalid, \ 82 }) 83 84 static int key_type_inline_data_invalid(struct bch_fs *c, struct bkey_s_c k, 85 enum bkey_invalid_flags flags, struct printbuf *err) 86 { 87 return 0; 88 } 89 90 static void key_type_inline_data_to_text(struct printbuf *out, struct bch_fs *c, 91 struct bkey_s_c k) 92 { 93 struct bkey_s_c_inline_data d = bkey_s_c_to_inline_data(k); 94 unsigned datalen = bkey_inline_data_bytes(k.k); 95 96 prt_printf(out, "datalen %u: %*phN", 97 datalen, min(datalen, 32U), d.v->data); 98 } 99 100 #define bch2_bkey_ops_inline_data ((struct bkey_ops) { \ 101 .key_invalid = key_type_inline_data_invalid, \ 102 .val_to_text = key_type_inline_data_to_text, \ 103 }) 104 105 static bool key_type_set_merge(struct bch_fs *c, struct bkey_s l, struct bkey_s_c r) 106 { 107 bch2_key_resize(l.k, l.k->size + r.k->size); 108 return true; 109 } 110 111 #define bch2_bkey_ops_set ((struct bkey_ops) { \ 112 .key_invalid = empty_val_key_invalid, \ 113 .key_merge = key_type_set_merge, \ 114 }) 115 116 const struct bkey_ops bch2_bkey_ops[] = { 117 #define x(name, nr) [KEY_TYPE_##name] = bch2_bkey_ops_##name, 118 BCH_BKEY_TYPES() 119 #undef x 120 }; 121 122 const struct bkey_ops bch2_bkey_null_ops = { 123 }; 124 125 int bch2_bkey_val_invalid(struct bch_fs *c, struct bkey_s_c k, 126 enum bkey_invalid_flags flags, 127 struct printbuf *err) 128 { 129 const struct bkey_ops *ops = bch2_bkey_type_ops(k.k->type); 130 int ret = 0; 131 132 bkey_fsck_err_on(bkey_val_bytes(k.k) < ops->min_val_size, c, err, 133 bkey_val_size_too_small, 134 "bad val size (%zu < %u)", 135 bkey_val_bytes(k.k), ops->min_val_size); 136 137 if (!ops->key_invalid) 138 return 0; 139 140 ret = ops->key_invalid(c, k, flags, err); 141 fsck_err: 142 return ret; 143 } 144 145 static u64 bch2_key_types_allowed[] = { 146 [BKEY_TYPE_btree] = 147 BIT_ULL(KEY_TYPE_deleted)| 148 BIT_ULL(KEY_TYPE_btree_ptr)| 149 BIT_ULL(KEY_TYPE_btree_ptr_v2), 150 #define x(name, nr, flags, keys) [BKEY_TYPE_##name] = BIT_ULL(KEY_TYPE_deleted)|keys, 151 BCH_BTREE_IDS() 152 #undef x 153 }; 154 155 const char *bch2_btree_node_type_str(enum btree_node_type type) 156 { 157 return type == BKEY_TYPE_btree ? "internal btree node" : bch2_btree_id_str(type - 1); 158 } 159 160 int __bch2_bkey_invalid(struct bch_fs *c, struct bkey_s_c k, 161 enum btree_node_type type, 162 enum bkey_invalid_flags flags, 163 struct printbuf *err) 164 { 165 int ret = 0; 166 167 bkey_fsck_err_on(k.k->u64s < BKEY_U64s, c, err, 168 bkey_u64s_too_small, 169 "u64s too small (%u < %zu)", k.k->u64s, BKEY_U64s); 170 171 if (type >= BKEY_TYPE_NR) 172 return 0; 173 174 bkey_fsck_err_on((type == BKEY_TYPE_btree || 175 (flags & BKEY_INVALID_COMMIT)) && 176 !(bch2_key_types_allowed[type] & BIT_ULL(k.k->type)), c, err, 177 bkey_invalid_type_for_btree, 178 "invalid key type for btree %s (%s)", 179 bch2_btree_node_type_str(type), 180 k.k->type < KEY_TYPE_MAX 181 ? bch2_bkey_types[k.k->type] 182 : "(unknown)"); 183 184 if (btree_node_type_is_extents(type) && !bkey_whiteout(k.k)) { 185 bkey_fsck_err_on(k.k->size == 0, c, err, 186 bkey_extent_size_zero, 187 "size == 0"); 188 189 bkey_fsck_err_on(k.k->size > k.k->p.offset, c, err, 190 bkey_extent_size_greater_than_offset, 191 "size greater than offset (%u > %llu)", 192 k.k->size, k.k->p.offset); 193 } else { 194 bkey_fsck_err_on(k.k->size, c, err, 195 bkey_size_nonzero, 196 "size != 0"); 197 } 198 199 if (type != BKEY_TYPE_btree) { 200 enum btree_id btree = type - 1; 201 202 if (btree_type_has_snapshots(btree)) { 203 bkey_fsck_err_on(!k.k->p.snapshot, c, err, 204 bkey_snapshot_zero, 205 "snapshot == 0"); 206 } else if (!btree_type_has_snapshot_field(btree)) { 207 bkey_fsck_err_on(k.k->p.snapshot, c, err, 208 bkey_snapshot_nonzero, 209 "nonzero snapshot"); 210 } else { 211 /* 212 * btree uses snapshot field but it's not required to be 213 * nonzero 214 */ 215 } 216 217 bkey_fsck_err_on(bkey_eq(k.k->p, POS_MAX), c, err, 218 bkey_at_pos_max, 219 "key at POS_MAX"); 220 } 221 fsck_err: 222 return ret; 223 } 224 225 int bch2_bkey_invalid(struct bch_fs *c, struct bkey_s_c k, 226 enum btree_node_type type, 227 enum bkey_invalid_flags flags, 228 struct printbuf *err) 229 { 230 return __bch2_bkey_invalid(c, k, type, flags, err) ?: 231 bch2_bkey_val_invalid(c, k, flags, err); 232 } 233 234 int bch2_bkey_in_btree_node(struct bch_fs *c, struct btree *b, 235 struct bkey_s_c k, struct printbuf *err) 236 { 237 int ret = 0; 238 239 bkey_fsck_err_on(bpos_lt(k.k->p, b->data->min_key), c, err, 240 bkey_before_start_of_btree_node, 241 "key before start of btree node"); 242 243 bkey_fsck_err_on(bpos_gt(k.k->p, b->data->max_key), c, err, 244 bkey_after_end_of_btree_node, 245 "key past end of btree node"); 246 fsck_err: 247 return ret; 248 } 249 250 void bch2_bpos_to_text(struct printbuf *out, struct bpos pos) 251 { 252 if (bpos_eq(pos, POS_MIN)) 253 prt_printf(out, "POS_MIN"); 254 else if (bpos_eq(pos, POS_MAX)) 255 prt_printf(out, "POS_MAX"); 256 else if (bpos_eq(pos, SPOS_MAX)) 257 prt_printf(out, "SPOS_MAX"); 258 else { 259 if (pos.inode == U64_MAX) 260 prt_printf(out, "U64_MAX"); 261 else 262 prt_printf(out, "%llu", pos.inode); 263 prt_printf(out, ":"); 264 if (pos.offset == U64_MAX) 265 prt_printf(out, "U64_MAX"); 266 else 267 prt_printf(out, "%llu", pos.offset); 268 prt_printf(out, ":"); 269 if (pos.snapshot == U32_MAX) 270 prt_printf(out, "U32_MAX"); 271 else 272 prt_printf(out, "%u", pos.snapshot); 273 } 274 } 275 276 void bch2_bkey_to_text(struct printbuf *out, const struct bkey *k) 277 { 278 if (k) { 279 prt_printf(out, "u64s %u type ", k->u64s); 280 281 if (k->type < KEY_TYPE_MAX) 282 prt_printf(out, "%s ", bch2_bkey_types[k->type]); 283 else 284 prt_printf(out, "%u ", k->type); 285 286 bch2_bpos_to_text(out, k->p); 287 288 prt_printf(out, " len %u ver %llu", k->size, k->version.lo); 289 } else { 290 prt_printf(out, "(null)"); 291 } 292 } 293 294 void bch2_val_to_text(struct printbuf *out, struct bch_fs *c, 295 struct bkey_s_c k) 296 { 297 const struct bkey_ops *ops = bch2_bkey_type_ops(k.k->type); 298 299 if (likely(ops->val_to_text)) 300 ops->val_to_text(out, c, k); 301 } 302 303 void bch2_bkey_val_to_text(struct printbuf *out, struct bch_fs *c, 304 struct bkey_s_c k) 305 { 306 bch2_bkey_to_text(out, k.k); 307 308 if (bkey_val_bytes(k.k)) { 309 prt_printf(out, ": "); 310 bch2_val_to_text(out, c, k); 311 } 312 } 313 314 void bch2_bkey_swab_val(struct bkey_s k) 315 { 316 const struct bkey_ops *ops = bch2_bkey_type_ops(k.k->type); 317 318 if (ops->swab) 319 ops->swab(k); 320 } 321 322 bool bch2_bkey_normalize(struct bch_fs *c, struct bkey_s k) 323 { 324 const struct bkey_ops *ops = bch2_bkey_type_ops(k.k->type); 325 326 return ops->key_normalize 327 ? ops->key_normalize(c, k) 328 : false; 329 } 330 331 bool bch2_bkey_merge(struct bch_fs *c, struct bkey_s l, struct bkey_s_c r) 332 { 333 const struct bkey_ops *ops = bch2_bkey_type_ops(l.k->type); 334 335 return ops->key_merge && 336 bch2_bkey_maybe_mergable(l.k, r.k) && 337 (u64) l.k->size + r.k->size <= KEY_SIZE_MAX && 338 !bch2_key_merging_disabled && 339 ops->key_merge(c, l, r); 340 } 341 342 static const struct old_bkey_type { 343 u8 btree_node_type; 344 u8 old; 345 u8 new; 346 } bkey_renumber_table[] = { 347 {BKEY_TYPE_btree, 128, KEY_TYPE_btree_ptr }, 348 {BKEY_TYPE_extents, 128, KEY_TYPE_extent }, 349 {BKEY_TYPE_extents, 129, KEY_TYPE_extent }, 350 {BKEY_TYPE_extents, 130, KEY_TYPE_reservation }, 351 {BKEY_TYPE_inodes, 128, KEY_TYPE_inode }, 352 {BKEY_TYPE_inodes, 130, KEY_TYPE_inode_generation }, 353 {BKEY_TYPE_dirents, 128, KEY_TYPE_dirent }, 354 {BKEY_TYPE_dirents, 129, KEY_TYPE_hash_whiteout }, 355 {BKEY_TYPE_xattrs, 128, KEY_TYPE_xattr }, 356 {BKEY_TYPE_xattrs, 129, KEY_TYPE_hash_whiteout }, 357 {BKEY_TYPE_alloc, 128, KEY_TYPE_alloc }, 358 {BKEY_TYPE_quotas, 128, KEY_TYPE_quota }, 359 }; 360 361 void bch2_bkey_renumber(enum btree_node_type btree_node_type, 362 struct bkey_packed *k, 363 int write) 364 { 365 const struct old_bkey_type *i; 366 367 for (i = bkey_renumber_table; 368 i < bkey_renumber_table + ARRAY_SIZE(bkey_renumber_table); 369 i++) 370 if (btree_node_type == i->btree_node_type && 371 k->type == (write ? i->new : i->old)) { 372 k->type = write ? i->old : i->new; 373 break; 374 } 375 } 376 377 void __bch2_bkey_compat(unsigned level, enum btree_id btree_id, 378 unsigned version, unsigned big_endian, 379 int write, 380 struct bkey_format *f, 381 struct bkey_packed *k) 382 { 383 const struct bkey_ops *ops; 384 struct bkey uk; 385 unsigned nr_compat = 5; 386 int i; 387 388 /* 389 * Do these operations in reverse order in the write path: 390 */ 391 392 for (i = 0; i < nr_compat; i++) 393 switch (!write ? i : nr_compat - 1 - i) { 394 case 0: 395 if (big_endian != CPU_BIG_ENDIAN) 396 bch2_bkey_swab_key(f, k); 397 break; 398 case 1: 399 if (version < bcachefs_metadata_version_bkey_renumber) 400 bch2_bkey_renumber(__btree_node_type(level, btree_id), k, write); 401 break; 402 case 2: 403 if (version < bcachefs_metadata_version_inode_btree_change && 404 btree_id == BTREE_ID_inodes) { 405 if (!bkey_packed(k)) { 406 struct bkey_i *u = packed_to_bkey(k); 407 408 swap(u->k.p.inode, u->k.p.offset); 409 } else if (f->bits_per_field[BKEY_FIELD_INODE] && 410 f->bits_per_field[BKEY_FIELD_OFFSET]) { 411 struct bkey_format tmp = *f, *in = f, *out = &tmp; 412 413 swap(tmp.bits_per_field[BKEY_FIELD_INODE], 414 tmp.bits_per_field[BKEY_FIELD_OFFSET]); 415 swap(tmp.field_offset[BKEY_FIELD_INODE], 416 tmp.field_offset[BKEY_FIELD_OFFSET]); 417 418 if (!write) 419 swap(in, out); 420 421 uk = __bch2_bkey_unpack_key(in, k); 422 swap(uk.p.inode, uk.p.offset); 423 BUG_ON(!bch2_bkey_pack_key(k, &uk, out)); 424 } 425 } 426 break; 427 case 3: 428 if (version < bcachefs_metadata_version_snapshot && 429 (level || btree_type_has_snapshots(btree_id))) { 430 struct bkey_i *u = packed_to_bkey(k); 431 432 if (u) { 433 u->k.p.snapshot = write 434 ? 0 : U32_MAX; 435 } else { 436 u64 min_packed = le64_to_cpu(f->field_offset[BKEY_FIELD_SNAPSHOT]); 437 u64 max_packed = min_packed + 438 ~(~0ULL << f->bits_per_field[BKEY_FIELD_SNAPSHOT]); 439 440 uk = __bch2_bkey_unpack_key(f, k); 441 uk.p.snapshot = write 442 ? min_packed : min_t(u64, U32_MAX, max_packed); 443 444 BUG_ON(!bch2_bkey_pack_key(k, &uk, f)); 445 } 446 } 447 448 break; 449 case 4: { 450 struct bkey_s u; 451 452 if (!bkey_packed(k)) { 453 u = bkey_i_to_s(packed_to_bkey(k)); 454 } else { 455 uk = __bch2_bkey_unpack_key(f, k); 456 u.k = &uk; 457 u.v = bkeyp_val(f, k); 458 } 459 460 if (big_endian != CPU_BIG_ENDIAN) 461 bch2_bkey_swab_val(u); 462 463 ops = bch2_bkey_type_ops(k->type); 464 465 if (ops->compat) 466 ops->compat(btree_id, version, big_endian, write, u); 467 break; 468 } 469 default: 470 BUG(); 471 } 472 } 473