1 // SPDX-License-Identifier: GPL-2.0 2 3 #include "bcachefs.h" 4 #include "checksum.h" 5 #include "disk_groups.h" 6 #include "ec.h" 7 #include "error.h" 8 #include "journal.h" 9 #include "journal_sb.h" 10 #include "journal_seq_blacklist.h" 11 #include "recovery_passes.h" 12 #include "replicas.h" 13 #include "quota.h" 14 #include "sb-clean.h" 15 #include "sb-counters.h" 16 #include "sb-downgrade.h" 17 #include "sb-errors.h" 18 #include "sb-members.h" 19 #include "super-io.h" 20 #include "super.h" 21 #include "trace.h" 22 #include "vstructs.h" 23 24 #include <linux/backing-dev.h> 25 #include <linux/sort.h> 26 #include <linux/string_choices.h> 27 28 static const struct blk_holder_ops bch2_sb_handle_bdev_ops = { 29 }; 30 31 struct bch2_metadata_version { 32 u16 version; 33 const char *name; 34 }; 35 36 static const struct bch2_metadata_version bch2_metadata_versions[] = { 37 #define x(n, v) { \ 38 .version = v, \ 39 .name = #n, \ 40 }, 41 BCH_METADATA_VERSIONS() 42 #undef x 43 }; 44 45 void bch2_version_to_text(struct printbuf *out, enum bcachefs_metadata_version v) 46 { 47 const char *str = "(unknown version)"; 48 49 for (unsigned i = 0; i < ARRAY_SIZE(bch2_metadata_versions); i++) 50 if (bch2_metadata_versions[i].version == v) { 51 str = bch2_metadata_versions[i].name; 52 break; 53 } 54 55 prt_printf(out, "%u.%u: %s", BCH_VERSION_MAJOR(v), BCH_VERSION_MINOR(v), str); 56 } 57 58 enum bcachefs_metadata_version bch2_latest_compatible_version(enum bcachefs_metadata_version v) 59 { 60 if (!BCH_VERSION_MAJOR(v)) 61 return v; 62 63 for (unsigned i = 0; i < ARRAY_SIZE(bch2_metadata_versions); i++) 64 if (bch2_metadata_versions[i].version > v && 65 BCH_VERSION_MAJOR(bch2_metadata_versions[i].version) == 66 BCH_VERSION_MAJOR(v)) 67 v = bch2_metadata_versions[i].version; 68 69 return v; 70 } 71 72 bool bch2_set_version_incompat(struct bch_fs *c, enum bcachefs_metadata_version version) 73 { 74 bool ret = (c->sb.features & BIT_ULL(BCH_FEATURE_incompat_version_field)) && 75 version <= c->sb.version_incompat_allowed; 76 77 if (ret) { 78 mutex_lock(&c->sb_lock); 79 SET_BCH_SB_VERSION_INCOMPAT(c->disk_sb.sb, 80 max(BCH_SB_VERSION_INCOMPAT(c->disk_sb.sb), version)); 81 bch2_write_super(c); 82 mutex_unlock(&c->sb_lock); 83 } 84 85 return ret; 86 } 87 88 const char * const bch2_sb_fields[] = { 89 #define x(name, nr) #name, 90 BCH_SB_FIELDS() 91 #undef x 92 NULL 93 }; 94 95 static int bch2_sb_field_validate(struct bch_sb *, struct bch_sb_field *, 96 enum bch_validate_flags, struct printbuf *); 97 98 struct bch_sb_field *bch2_sb_field_get_id(struct bch_sb *sb, 99 enum bch_sb_field_type type) 100 { 101 /* XXX: need locking around superblock to access optional fields */ 102 103 vstruct_for_each(sb, f) 104 if (le32_to_cpu(f->type) == type) 105 return f; 106 return NULL; 107 } 108 109 static struct bch_sb_field *__bch2_sb_field_resize(struct bch_sb_handle *sb, 110 struct bch_sb_field *f, 111 unsigned u64s) 112 { 113 unsigned old_u64s = f ? le32_to_cpu(f->u64s) : 0; 114 unsigned sb_u64s = le32_to_cpu(sb->sb->u64s) + u64s - old_u64s; 115 116 BUG_ON(__vstruct_bytes(struct bch_sb, sb_u64s) > sb->buffer_size); 117 118 if (!f && !u64s) { 119 /* nothing to do: */ 120 } else if (!f) { 121 f = vstruct_last(sb->sb); 122 memset(f, 0, sizeof(u64) * u64s); 123 f->u64s = cpu_to_le32(u64s); 124 f->type = 0; 125 } else { 126 void *src, *dst; 127 128 src = vstruct_end(f); 129 130 if (u64s) { 131 f->u64s = cpu_to_le32(u64s); 132 dst = vstruct_end(f); 133 } else { 134 dst = f; 135 } 136 137 memmove(dst, src, vstruct_end(sb->sb) - src); 138 139 if (dst > src) 140 memset(src, 0, dst - src); 141 } 142 143 sb->sb->u64s = cpu_to_le32(sb_u64s); 144 145 return u64s ? f : NULL; 146 } 147 148 void bch2_sb_field_delete(struct bch_sb_handle *sb, 149 enum bch_sb_field_type type) 150 { 151 struct bch_sb_field *f = bch2_sb_field_get_id(sb->sb, type); 152 153 if (f) 154 __bch2_sb_field_resize(sb, f, 0); 155 } 156 157 /* Superblock realloc/free: */ 158 159 void bch2_free_super(struct bch_sb_handle *sb) 160 { 161 kfree(sb->bio); 162 if (!IS_ERR_OR_NULL(sb->s_bdev_file)) 163 bdev_fput(sb->s_bdev_file); 164 kfree(sb->holder); 165 kfree(sb->sb_name); 166 167 kfree(sb->sb); 168 memset(sb, 0, sizeof(*sb)); 169 } 170 171 int bch2_sb_realloc(struct bch_sb_handle *sb, unsigned u64s) 172 { 173 size_t new_bytes = __vstruct_bytes(struct bch_sb, u64s); 174 size_t new_buffer_size; 175 struct bch_sb *new_sb; 176 struct bio *bio; 177 178 if (sb->bdev) 179 new_bytes = max_t(size_t, new_bytes, bdev_logical_block_size(sb->bdev)); 180 181 new_buffer_size = roundup_pow_of_two(new_bytes); 182 183 if (sb->sb && sb->buffer_size >= new_buffer_size) 184 return 0; 185 186 if (sb->sb && sb->have_layout) { 187 u64 max_bytes = 512 << sb->sb->layout.sb_max_size_bits; 188 189 if (new_bytes > max_bytes) { 190 struct printbuf buf = PRINTBUF; 191 192 prt_bdevname(&buf, sb->bdev); 193 prt_printf(&buf, ": superblock too big: want %zu but have %llu", new_bytes, max_bytes); 194 pr_err("%s", buf.buf); 195 printbuf_exit(&buf); 196 return -BCH_ERR_ENOSPC_sb; 197 } 198 } 199 200 if (sb->buffer_size >= new_buffer_size && sb->sb) 201 return 0; 202 203 if (dynamic_fault("bcachefs:add:super_realloc")) 204 return -BCH_ERR_ENOMEM_sb_realloc_injected; 205 206 new_sb = krealloc(sb->sb, new_buffer_size, GFP_NOFS|__GFP_ZERO); 207 if (!new_sb) 208 return -BCH_ERR_ENOMEM_sb_buf_realloc; 209 210 sb->sb = new_sb; 211 212 if (sb->have_bio) { 213 unsigned nr_bvecs = buf_pages(sb->sb, new_buffer_size); 214 215 bio = bio_kmalloc(nr_bvecs, GFP_KERNEL); 216 if (!bio) 217 return -BCH_ERR_ENOMEM_sb_bio_realloc; 218 219 bio_init(bio, NULL, bio->bi_inline_vecs, nr_bvecs, 0); 220 221 kfree(sb->bio); 222 sb->bio = bio; 223 } 224 225 sb->buffer_size = new_buffer_size; 226 227 return 0; 228 } 229 230 struct bch_sb_field *bch2_sb_field_resize_id(struct bch_sb_handle *sb, 231 enum bch_sb_field_type type, 232 unsigned u64s) 233 { 234 struct bch_sb_field *f = bch2_sb_field_get_id(sb->sb, type); 235 ssize_t old_u64s = f ? le32_to_cpu(f->u64s) : 0; 236 ssize_t d = -old_u64s + u64s; 237 238 if (bch2_sb_realloc(sb, le32_to_cpu(sb->sb->u64s) + d)) 239 return NULL; 240 241 if (sb->fs_sb) { 242 struct bch_fs *c = container_of(sb, struct bch_fs, disk_sb); 243 244 lockdep_assert_held(&c->sb_lock); 245 246 /* XXX: we're not checking that offline device have enough space */ 247 248 for_each_online_member(c, ca) { 249 struct bch_sb_handle *dev_sb = &ca->disk_sb; 250 251 if (bch2_sb_realloc(dev_sb, le32_to_cpu(dev_sb->sb->u64s) + d)) { 252 percpu_ref_put(&ca->io_ref); 253 return NULL; 254 } 255 } 256 } 257 258 f = bch2_sb_field_get_id(sb->sb, type); 259 f = __bch2_sb_field_resize(sb, f, u64s); 260 if (f) 261 f->type = cpu_to_le32(type); 262 return f; 263 } 264 265 struct bch_sb_field *bch2_sb_field_get_minsize_id(struct bch_sb_handle *sb, 266 enum bch_sb_field_type type, 267 unsigned u64s) 268 { 269 struct bch_sb_field *f = bch2_sb_field_get_id(sb->sb, type); 270 271 if (!f || le32_to_cpu(f->u64s) < u64s) 272 f = bch2_sb_field_resize_id(sb, type, u64s); 273 return f; 274 } 275 276 /* Superblock validate: */ 277 278 static int validate_sb_layout(struct bch_sb_layout *layout, struct printbuf *out) 279 { 280 u64 offset, prev_offset, max_sectors; 281 unsigned i; 282 283 BUILD_BUG_ON(sizeof(struct bch_sb_layout) != 512); 284 285 if (!uuid_equal(&layout->magic, &BCACHE_MAGIC) && 286 !uuid_equal(&layout->magic, &BCHFS_MAGIC)) { 287 prt_printf(out, "Not a bcachefs superblock layout"); 288 return -BCH_ERR_invalid_sb_layout; 289 } 290 291 if (layout->layout_type != 0) { 292 prt_printf(out, "Invalid superblock layout type %u", 293 layout->layout_type); 294 return -BCH_ERR_invalid_sb_layout_type; 295 } 296 297 if (!layout->nr_superblocks) { 298 prt_printf(out, "Invalid superblock layout: no superblocks"); 299 return -BCH_ERR_invalid_sb_layout_nr_superblocks; 300 } 301 302 if (layout->nr_superblocks > ARRAY_SIZE(layout->sb_offset)) { 303 prt_printf(out, "Invalid superblock layout: too many superblocks"); 304 return -BCH_ERR_invalid_sb_layout_nr_superblocks; 305 } 306 307 if (layout->sb_max_size_bits > BCH_SB_LAYOUT_SIZE_BITS_MAX) { 308 prt_printf(out, "Invalid superblock layout: max_size_bits too high"); 309 return -BCH_ERR_invalid_sb_layout_sb_max_size_bits; 310 } 311 312 max_sectors = 1 << layout->sb_max_size_bits; 313 314 prev_offset = le64_to_cpu(layout->sb_offset[0]); 315 316 for (i = 1; i < layout->nr_superblocks; i++) { 317 offset = le64_to_cpu(layout->sb_offset[i]); 318 319 if (offset < prev_offset + max_sectors) { 320 prt_printf(out, "Invalid superblock layout: superblocks overlap\n" 321 " (sb %u ends at %llu next starts at %llu", 322 i - 1, prev_offset + max_sectors, offset); 323 return -BCH_ERR_invalid_sb_layout_superblocks_overlap; 324 } 325 prev_offset = offset; 326 } 327 328 return 0; 329 } 330 331 static int bch2_sb_compatible(struct bch_sb *sb, struct printbuf *out) 332 { 333 u16 version = le16_to_cpu(sb->version); 334 u16 version_min = le16_to_cpu(sb->version_min); 335 336 if (!bch2_version_compatible(version)) { 337 prt_str(out, "Unsupported superblock version "); 338 bch2_version_to_text(out, version); 339 prt_str(out, " (min "); 340 bch2_version_to_text(out, bcachefs_metadata_version_min); 341 prt_str(out, ", max "); 342 bch2_version_to_text(out, bcachefs_metadata_version_current); 343 prt_str(out, ")"); 344 return -BCH_ERR_invalid_sb_version; 345 } 346 347 if (!bch2_version_compatible(version_min)) { 348 prt_str(out, "Unsupported superblock version_min "); 349 bch2_version_to_text(out, version_min); 350 prt_str(out, " (min "); 351 bch2_version_to_text(out, bcachefs_metadata_version_min); 352 prt_str(out, ", max "); 353 bch2_version_to_text(out, bcachefs_metadata_version_current); 354 prt_str(out, ")"); 355 return -BCH_ERR_invalid_sb_version; 356 } 357 358 if (version_min > version) { 359 prt_str(out, "Bad minimum version "); 360 bch2_version_to_text(out, version_min); 361 prt_str(out, ", greater than version field "); 362 bch2_version_to_text(out, version); 363 return -BCH_ERR_invalid_sb_version; 364 } 365 366 return 0; 367 } 368 369 static int bch2_sb_validate(struct bch_sb_handle *disk_sb, 370 enum bch_validate_flags flags, struct printbuf *out) 371 { 372 struct bch_sb *sb = disk_sb->sb; 373 struct bch_sb_field_members_v1 *mi; 374 enum bch_opt_id opt_id; 375 u16 block_size; 376 int ret; 377 378 ret = bch2_sb_compatible(sb, out); 379 if (ret) 380 return ret; 381 382 if (sb->features[1] || 383 (le64_to_cpu(sb->features[0]) & (~0ULL << BCH_FEATURE_NR))) { 384 prt_printf(out, "Filesystem has incompatible features"); 385 return -BCH_ERR_invalid_sb_features; 386 } 387 388 if (BCH_VERSION_MAJOR(le16_to_cpu(sb->version)) > BCH_VERSION_MAJOR(bcachefs_metadata_version_current) || 389 BCH_SB_VERSION_INCOMPAT(sb) > bcachefs_metadata_version_current) { 390 prt_printf(out, "Filesystem has incompatible version"); 391 return -BCH_ERR_invalid_sb_features; 392 } 393 394 block_size = le16_to_cpu(sb->block_size); 395 396 if (block_size > PAGE_SECTORS) { 397 prt_printf(out, "Block size too big (got %u, max %u)", 398 block_size, PAGE_SECTORS); 399 return -BCH_ERR_invalid_sb_block_size; 400 } 401 402 if (bch2_is_zero(sb->user_uuid.b, sizeof(sb->user_uuid))) { 403 prt_printf(out, "Bad user UUID (got zeroes)"); 404 return -BCH_ERR_invalid_sb_uuid; 405 } 406 407 if (bch2_is_zero(sb->uuid.b, sizeof(sb->uuid))) { 408 prt_printf(out, "Bad internal UUID (got zeroes)"); 409 return -BCH_ERR_invalid_sb_uuid; 410 } 411 412 if (!sb->nr_devices || 413 sb->nr_devices > BCH_SB_MEMBERS_MAX) { 414 prt_printf(out, "Bad number of member devices %u (max %u)", 415 sb->nr_devices, BCH_SB_MEMBERS_MAX); 416 return -BCH_ERR_invalid_sb_too_many_members; 417 } 418 419 if (sb->dev_idx >= sb->nr_devices) { 420 prt_printf(out, "Bad dev_idx (got %u, nr_devices %u)", 421 sb->dev_idx, sb->nr_devices); 422 return -BCH_ERR_invalid_sb_dev_idx; 423 } 424 425 if (!sb->time_precision || 426 le32_to_cpu(sb->time_precision) > NSEC_PER_SEC) { 427 prt_printf(out, "Invalid time precision: %u (min 1, max %lu)", 428 le32_to_cpu(sb->time_precision), NSEC_PER_SEC); 429 return -BCH_ERR_invalid_sb_time_precision; 430 } 431 432 /* old versions didn't know to downgrade this field */ 433 if (BCH_SB_VERSION_INCOMPAT_ALLOWED(sb) > le16_to_cpu(sb->version)) 434 SET_BCH_SB_VERSION_INCOMPAT_ALLOWED(sb, le16_to_cpu(sb->version)); 435 436 if (BCH_SB_VERSION_INCOMPAT(sb) > BCH_SB_VERSION_INCOMPAT_ALLOWED(sb)) { 437 prt_printf(out, "Invalid version_incompat "); 438 bch2_version_to_text(out, BCH_SB_VERSION_INCOMPAT(sb)); 439 prt_str(out, " > incompat_allowed "); 440 bch2_version_to_text(out, BCH_SB_VERSION_INCOMPAT_ALLOWED(sb)); 441 if (flags & BCH_VALIDATE_write) 442 return -BCH_ERR_invalid_sb_version; 443 else 444 SET_BCH_SB_VERSION_INCOMPAT_ALLOWED(sb, BCH_SB_VERSION_INCOMPAT(sb)); 445 } 446 447 if (!flags) { 448 /* 449 * Been seeing a bug where these are getting inexplicably 450 * zeroed, so we're now validating them, but we have to be 451 * careful not to preven people's filesystems from mounting: 452 */ 453 if (!BCH_SB_JOURNAL_FLUSH_DELAY(sb)) 454 SET_BCH_SB_JOURNAL_FLUSH_DELAY(sb, 1000); 455 if (!BCH_SB_JOURNAL_RECLAIM_DELAY(sb)) 456 SET_BCH_SB_JOURNAL_RECLAIM_DELAY(sb, 1000); 457 458 if (!BCH_SB_VERSION_UPGRADE_COMPLETE(sb)) 459 SET_BCH_SB_VERSION_UPGRADE_COMPLETE(sb, le16_to_cpu(sb->version)); 460 461 if (le16_to_cpu(sb->version) <= bcachefs_metadata_version_disk_accounting_v2 && 462 !BCH_SB_ALLOCATOR_STUCK_TIMEOUT(sb)) 463 SET_BCH_SB_ALLOCATOR_STUCK_TIMEOUT(sb, 30); 464 465 if (le16_to_cpu(sb->version) <= bcachefs_metadata_version_disk_accounting_v2) 466 SET_BCH_SB_PROMOTE_WHOLE_EXTENTS(sb, true); 467 } 468 469 #ifdef __KERNEL__ 470 if (!BCH_SB_SHARD_INUMS_NBITS(sb)) 471 SET_BCH_SB_SHARD_INUMS_NBITS(sb, ilog2(roundup_pow_of_two(num_online_cpus()))); 472 #endif 473 474 for (opt_id = 0; opt_id < bch2_opts_nr; opt_id++) { 475 const struct bch_option *opt = bch2_opt_table + opt_id; 476 477 if (opt->get_sb != BCH2_NO_SB_OPT) { 478 u64 v = bch2_opt_from_sb(sb, opt_id); 479 480 prt_printf(out, "Invalid option "); 481 ret = bch2_opt_validate(opt, v, out); 482 if (ret) 483 return ret; 484 485 printbuf_reset(out); 486 } 487 } 488 489 /* validate layout */ 490 ret = validate_sb_layout(&sb->layout, out); 491 if (ret) 492 return ret; 493 494 vstruct_for_each(sb, f) { 495 if (!f->u64s) { 496 prt_printf(out, "Invalid superblock: optional field with size 0 (type %u)", 497 le32_to_cpu(f->type)); 498 return -BCH_ERR_invalid_sb_field_size; 499 } 500 501 if (vstruct_next(f) > vstruct_last(sb)) { 502 prt_printf(out, "Invalid superblock: optional field extends past end of superblock (type %u)", 503 le32_to_cpu(f->type)); 504 return -BCH_ERR_invalid_sb_field_size; 505 } 506 } 507 508 /* members must be validated first: */ 509 mi = bch2_sb_field_get(sb, members_v1); 510 if (!mi) { 511 prt_printf(out, "Invalid superblock: member info area missing"); 512 return -BCH_ERR_invalid_sb_members_missing; 513 } 514 515 ret = bch2_sb_field_validate(sb, &mi->field, flags, out); 516 if (ret) 517 return ret; 518 519 vstruct_for_each(sb, f) { 520 if (le32_to_cpu(f->type) == BCH_SB_FIELD_members_v1) 521 continue; 522 523 ret = bch2_sb_field_validate(sb, f, flags, out); 524 if (ret) 525 return ret; 526 } 527 528 if ((flags & BCH_VALIDATE_write) && 529 bch2_sb_member_get(sb, sb->dev_idx).seq != sb->seq) { 530 prt_printf(out, "Invalid superblock: member seq %llu != sb seq %llu", 531 le64_to_cpu(bch2_sb_member_get(sb, sb->dev_idx).seq), 532 le64_to_cpu(sb->seq)); 533 return -BCH_ERR_invalid_sb_members_missing; 534 } 535 536 return 0; 537 } 538 539 /* device open: */ 540 541 static unsigned long le_ulong_to_cpu(unsigned long v) 542 { 543 return sizeof(unsigned long) == 8 544 ? le64_to_cpu(v) 545 : le32_to_cpu(v); 546 } 547 548 static void le_bitvector_to_cpu(unsigned long *dst, unsigned long *src, unsigned nr) 549 { 550 BUG_ON(nr & (BITS_PER_TYPE(long) - 1)); 551 552 for (unsigned i = 0; i < BITS_TO_LONGS(nr); i++) 553 dst[i] = le_ulong_to_cpu(src[i]); 554 } 555 556 static void bch2_sb_update(struct bch_fs *c) 557 { 558 struct bch_sb *src = c->disk_sb.sb; 559 560 lockdep_assert_held(&c->sb_lock); 561 562 c->sb.uuid = src->uuid; 563 c->sb.user_uuid = src->user_uuid; 564 c->sb.version = le16_to_cpu(src->version); 565 c->sb.version_incompat = BCH_SB_VERSION_INCOMPAT(src); 566 c->sb.version_incompat_allowed 567 = BCH_SB_VERSION_INCOMPAT_ALLOWED(src); 568 c->sb.version_min = le16_to_cpu(src->version_min); 569 c->sb.version_upgrade_complete = BCH_SB_VERSION_UPGRADE_COMPLETE(src); 570 c->sb.nr_devices = src->nr_devices; 571 c->sb.clean = BCH_SB_CLEAN(src); 572 c->sb.encryption_type = BCH_SB_ENCRYPTION_TYPE(src); 573 574 c->sb.nsec_per_time_unit = le32_to_cpu(src->time_precision); 575 c->sb.time_units_per_sec = NSEC_PER_SEC / c->sb.nsec_per_time_unit; 576 577 /* XXX this is wrong, we need a 96 or 128 bit integer type */ 578 c->sb.time_base_lo = div_u64(le64_to_cpu(src->time_base_lo), 579 c->sb.nsec_per_time_unit); 580 c->sb.time_base_hi = le32_to_cpu(src->time_base_hi); 581 582 c->sb.features = le64_to_cpu(src->features[0]); 583 c->sb.compat = le64_to_cpu(src->compat[0]); 584 585 memset(c->sb.errors_silent, 0, sizeof(c->sb.errors_silent)); 586 587 struct bch_sb_field_ext *ext = bch2_sb_field_get(src, ext); 588 if (ext) { 589 le_bitvector_to_cpu(c->sb.errors_silent, (void *) ext->errors_silent, 590 sizeof(c->sb.errors_silent) * 8); 591 c->sb.btrees_lost_data = le64_to_cpu(ext->btrees_lost_data); 592 } 593 594 for_each_member_device(c, ca) { 595 struct bch_member m = bch2_sb_member_get(src, ca->dev_idx); 596 ca->mi = bch2_mi_to_cpu(&m); 597 } 598 } 599 600 static int __copy_super(struct bch_sb_handle *dst_handle, struct bch_sb *src) 601 { 602 struct bch_sb_field *src_f, *dst_f; 603 struct bch_sb *dst = dst_handle->sb; 604 unsigned i; 605 606 dst->version = src->version; 607 dst->version_min = src->version_min; 608 dst->seq = src->seq; 609 dst->uuid = src->uuid; 610 dst->user_uuid = src->user_uuid; 611 memcpy(dst->label, src->label, sizeof(dst->label)); 612 613 dst->block_size = src->block_size; 614 dst->nr_devices = src->nr_devices; 615 616 dst->time_base_lo = src->time_base_lo; 617 dst->time_base_hi = src->time_base_hi; 618 dst->time_precision = src->time_precision; 619 dst->write_time = src->write_time; 620 621 memcpy(dst->flags, src->flags, sizeof(dst->flags)); 622 memcpy(dst->features, src->features, sizeof(dst->features)); 623 memcpy(dst->compat, src->compat, sizeof(dst->compat)); 624 625 for (i = 0; i < BCH_SB_FIELD_NR; i++) { 626 int d; 627 628 if ((1U << i) & BCH_SINGLE_DEVICE_SB_FIELDS) 629 continue; 630 631 src_f = bch2_sb_field_get_id(src, i); 632 dst_f = bch2_sb_field_get_id(dst, i); 633 634 d = (src_f ? le32_to_cpu(src_f->u64s) : 0) - 635 (dst_f ? le32_to_cpu(dst_f->u64s) : 0); 636 if (d > 0) { 637 int ret = bch2_sb_realloc(dst_handle, 638 le32_to_cpu(dst_handle->sb->u64s) + d); 639 640 if (ret) 641 return ret; 642 643 dst = dst_handle->sb; 644 dst_f = bch2_sb_field_get_id(dst, i); 645 } 646 647 dst_f = __bch2_sb_field_resize(dst_handle, dst_f, 648 src_f ? le32_to_cpu(src_f->u64s) : 0); 649 650 if (src_f) 651 memcpy(dst_f, src_f, vstruct_bytes(src_f)); 652 } 653 654 return 0; 655 } 656 657 int bch2_sb_to_fs(struct bch_fs *c, struct bch_sb *src) 658 { 659 int ret; 660 661 lockdep_assert_held(&c->sb_lock); 662 663 ret = bch2_sb_realloc(&c->disk_sb, 0) ?: 664 __copy_super(&c->disk_sb, src) ?: 665 bch2_sb_replicas_to_cpu_replicas(c) ?: 666 bch2_sb_disk_groups_to_cpu(c); 667 if (ret) 668 return ret; 669 670 bch2_sb_update(c); 671 return 0; 672 } 673 674 int bch2_sb_from_fs(struct bch_fs *c, struct bch_dev *ca) 675 { 676 return __copy_super(&ca->disk_sb, c->disk_sb.sb); 677 } 678 679 /* read superblock: */ 680 681 static int read_one_super(struct bch_sb_handle *sb, u64 offset, struct printbuf *err) 682 { 683 size_t bytes; 684 int ret; 685 reread: 686 bio_reset(sb->bio, sb->bdev, REQ_OP_READ|REQ_SYNC|REQ_META); 687 sb->bio->bi_iter.bi_sector = offset; 688 bch2_bio_map(sb->bio, sb->sb, sb->buffer_size); 689 690 ret = submit_bio_wait(sb->bio); 691 if (ret) { 692 prt_printf(err, "IO error: %i", ret); 693 return ret; 694 } 695 696 if (!uuid_equal(&sb->sb->magic, &BCACHE_MAGIC) && 697 !uuid_equal(&sb->sb->magic, &BCHFS_MAGIC)) { 698 prt_str(err, "Not a bcachefs superblock (got magic "); 699 pr_uuid(err, sb->sb->magic.b); 700 prt_str(err, ")"); 701 return -BCH_ERR_invalid_sb_magic; 702 } 703 704 ret = bch2_sb_compatible(sb->sb, err); 705 if (ret) 706 return ret; 707 708 bytes = vstruct_bytes(sb->sb); 709 710 u64 sb_size = 512ULL << min(BCH_SB_LAYOUT_SIZE_BITS_MAX, sb->sb->layout.sb_max_size_bits); 711 if (bytes > sb_size) { 712 prt_printf(err, "Invalid superblock: too big (got %zu bytes, layout max %llu)", 713 bytes, sb_size); 714 return -BCH_ERR_invalid_sb_too_big; 715 } 716 717 if (bytes > sb->buffer_size) { 718 ret = bch2_sb_realloc(sb, le32_to_cpu(sb->sb->u64s)); 719 if (ret) 720 return ret; 721 goto reread; 722 } 723 724 enum bch_csum_type csum_type = BCH_SB_CSUM_TYPE(sb->sb); 725 if (csum_type >= BCH_CSUM_NR || 726 bch2_csum_type_is_encryption(csum_type)) { 727 prt_printf(err, "unknown checksum type %llu", BCH_SB_CSUM_TYPE(sb->sb)); 728 return -BCH_ERR_invalid_sb_csum_type; 729 } 730 731 /* XXX: verify MACs */ 732 struct bch_csum csum = csum_vstruct(NULL, csum_type, null_nonce(), sb->sb); 733 if (bch2_crc_cmp(csum, sb->sb->csum)) { 734 bch2_csum_err_msg(err, csum_type, sb->sb->csum, csum); 735 return -BCH_ERR_invalid_sb_csum; 736 } 737 738 sb->seq = le64_to_cpu(sb->sb->seq); 739 740 return 0; 741 } 742 743 static int __bch2_read_super(const char *path, struct bch_opts *opts, 744 struct bch_sb_handle *sb, bool ignore_notbchfs_msg) 745 { 746 u64 offset = opt_get(*opts, sb); 747 struct bch_sb_layout layout; 748 struct printbuf err = PRINTBUF; 749 struct printbuf err2 = PRINTBUF; 750 __le64 *i; 751 int ret; 752 #ifndef __KERNEL__ 753 retry: 754 #endif 755 memset(sb, 0, sizeof(*sb)); 756 sb->mode = BLK_OPEN_READ; 757 sb->have_bio = true; 758 sb->holder = kmalloc(1, GFP_KERNEL); 759 if (!sb->holder) 760 return -ENOMEM; 761 762 sb->sb_name = kstrdup(path, GFP_KERNEL); 763 if (!sb->sb_name) { 764 ret = -ENOMEM; 765 prt_printf(&err, "error allocating memory for sb_name"); 766 goto err; 767 } 768 769 #ifndef __KERNEL__ 770 if (opt_get(*opts, direct_io) == false) 771 sb->mode |= BLK_OPEN_BUFFERED; 772 #endif 773 774 if (!opt_get(*opts, noexcl)) 775 sb->mode |= BLK_OPEN_EXCL; 776 777 if (!opt_get(*opts, nochanges)) 778 sb->mode |= BLK_OPEN_WRITE; 779 780 sb->s_bdev_file = bdev_file_open_by_path(path, sb->mode, sb->holder, &bch2_sb_handle_bdev_ops); 781 if (IS_ERR(sb->s_bdev_file) && 782 PTR_ERR(sb->s_bdev_file) == -EACCES && 783 opt_get(*opts, read_only)) { 784 sb->mode &= ~BLK_OPEN_WRITE; 785 786 sb->s_bdev_file = bdev_file_open_by_path(path, sb->mode, sb->holder, &bch2_sb_handle_bdev_ops); 787 if (!IS_ERR(sb->s_bdev_file)) 788 opt_set(*opts, nochanges, true); 789 } 790 791 if (IS_ERR(sb->s_bdev_file)) { 792 ret = PTR_ERR(sb->s_bdev_file); 793 prt_printf(&err, "error opening %s: %s", path, bch2_err_str(ret)); 794 goto err; 795 } 796 sb->bdev = file_bdev(sb->s_bdev_file); 797 798 ret = bch2_sb_realloc(sb, 0); 799 if (ret) { 800 prt_printf(&err, "error allocating memory for superblock"); 801 goto err; 802 } 803 804 if (bch2_fs_init_fault("read_super")) { 805 prt_printf(&err, "dynamic fault"); 806 ret = -EFAULT; 807 goto err; 808 } 809 810 ret = read_one_super(sb, offset, &err); 811 if (!ret) 812 goto got_super; 813 814 if (opt_defined(*opts, sb)) 815 goto err; 816 817 prt_printf(&err2, "bcachefs (%s): error reading default superblock: %s\n", 818 path, err.buf); 819 if (ret == -BCH_ERR_invalid_sb_magic && ignore_notbchfs_msg) 820 bch2_print_opts(opts, KERN_INFO "%s", err2.buf); 821 else 822 bch2_print_opts(opts, KERN_ERR "%s", err2.buf); 823 824 printbuf_exit(&err2); 825 printbuf_reset(&err); 826 827 /* 828 * Error reading primary superblock - read location of backup 829 * superblocks: 830 */ 831 bio_reset(sb->bio, sb->bdev, REQ_OP_READ|REQ_SYNC|REQ_META); 832 sb->bio->bi_iter.bi_sector = BCH_SB_LAYOUT_SECTOR; 833 /* 834 * use sb buffer to read layout, since sb buffer is page aligned but 835 * layout won't be: 836 */ 837 bch2_bio_map(sb->bio, sb->sb, sizeof(struct bch_sb_layout)); 838 839 ret = submit_bio_wait(sb->bio); 840 if (ret) { 841 prt_printf(&err, "IO error: %i", ret); 842 goto err; 843 } 844 845 memcpy(&layout, sb->sb, sizeof(layout)); 846 ret = validate_sb_layout(&layout, &err); 847 if (ret) 848 goto err; 849 850 for (i = layout.sb_offset; 851 i < layout.sb_offset + layout.nr_superblocks; i++) { 852 offset = le64_to_cpu(*i); 853 854 if (offset == opt_get(*opts, sb)) { 855 ret = -BCH_ERR_invalid; 856 continue; 857 } 858 859 ret = read_one_super(sb, offset, &err); 860 if (!ret) 861 goto got_super; 862 } 863 864 goto err; 865 866 got_super: 867 if (le16_to_cpu(sb->sb->block_size) << 9 < 868 bdev_logical_block_size(sb->bdev) && 869 opt_get(*opts, direct_io)) { 870 #ifndef __KERNEL__ 871 opt_set(*opts, direct_io, false); 872 bch2_free_super(sb); 873 goto retry; 874 #endif 875 prt_printf(&err, "block size (%u) smaller than device block size (%u)", 876 le16_to_cpu(sb->sb->block_size) << 9, 877 bdev_logical_block_size(sb->bdev)); 878 ret = -BCH_ERR_block_size_too_small; 879 goto err; 880 } 881 882 sb->have_layout = true; 883 884 ret = bch2_sb_validate(sb, 0, &err); 885 if (ret) { 886 bch2_print_opts(opts, KERN_ERR "bcachefs (%s): error validating superblock: %s\n", 887 path, err.buf); 888 goto err_no_print; 889 } 890 out: 891 printbuf_exit(&err); 892 return ret; 893 err: 894 bch2_print_opts(opts, KERN_ERR "bcachefs (%s): error reading superblock: %s\n", 895 path, err.buf); 896 err_no_print: 897 bch2_free_super(sb); 898 goto out; 899 } 900 901 int bch2_read_super(const char *path, struct bch_opts *opts, 902 struct bch_sb_handle *sb) 903 { 904 return __bch2_read_super(path, opts, sb, false); 905 } 906 907 /* provide a silenced version for mount.bcachefs */ 908 909 int bch2_read_super_silent(const char *path, struct bch_opts *opts, 910 struct bch_sb_handle *sb) 911 { 912 return __bch2_read_super(path, opts, sb, true); 913 } 914 915 /* write superblock: */ 916 917 static void write_super_endio(struct bio *bio) 918 { 919 struct bch_dev *ca = bio->bi_private; 920 921 /* XXX: return errors directly */ 922 923 if (bch2_dev_io_err_on(bio->bi_status, ca, 924 bio_data_dir(bio) 925 ? BCH_MEMBER_ERROR_write 926 : BCH_MEMBER_ERROR_read, 927 "superblock %s error: %s", 928 str_write_read(bio_data_dir(bio)), 929 bch2_blk_status_to_str(bio->bi_status))) 930 ca->sb_write_error = 1; 931 932 closure_put(&ca->fs->sb_write); 933 percpu_ref_put(&ca->io_ref); 934 } 935 936 static void read_back_super(struct bch_fs *c, struct bch_dev *ca) 937 { 938 struct bch_sb *sb = ca->disk_sb.sb; 939 struct bio *bio = ca->disk_sb.bio; 940 941 memset(ca->sb_read_scratch, 0, BCH_SB_READ_SCRATCH_BUF_SIZE); 942 943 bio_reset(bio, ca->disk_sb.bdev, REQ_OP_READ|REQ_SYNC|REQ_META); 944 bio->bi_iter.bi_sector = le64_to_cpu(sb->layout.sb_offset[0]); 945 bio->bi_end_io = write_super_endio; 946 bio->bi_private = ca; 947 bch2_bio_map(bio, ca->sb_read_scratch, BCH_SB_READ_SCRATCH_BUF_SIZE); 948 949 this_cpu_add(ca->io_done->sectors[READ][BCH_DATA_sb], bio_sectors(bio)); 950 951 percpu_ref_get(&ca->io_ref); 952 closure_bio_submit(bio, &c->sb_write); 953 } 954 955 static void write_one_super(struct bch_fs *c, struct bch_dev *ca, unsigned idx) 956 { 957 struct bch_sb *sb = ca->disk_sb.sb; 958 struct bio *bio = ca->disk_sb.bio; 959 960 sb->offset = sb->layout.sb_offset[idx]; 961 962 SET_BCH_SB_CSUM_TYPE(sb, bch2_csum_opt_to_type(c->opts.metadata_checksum, false)); 963 sb->csum = csum_vstruct(c, BCH_SB_CSUM_TYPE(sb), 964 null_nonce(), sb); 965 966 bio_reset(bio, ca->disk_sb.bdev, REQ_OP_WRITE|REQ_SYNC|REQ_META); 967 bio->bi_iter.bi_sector = le64_to_cpu(sb->offset); 968 bio->bi_end_io = write_super_endio; 969 bio->bi_private = ca; 970 bch2_bio_map(bio, sb, 971 roundup((size_t) vstruct_bytes(sb), 972 bdev_logical_block_size(ca->disk_sb.bdev))); 973 974 this_cpu_add(ca->io_done->sectors[WRITE][BCH_DATA_sb], 975 bio_sectors(bio)); 976 977 percpu_ref_get(&ca->io_ref); 978 closure_bio_submit(bio, &c->sb_write); 979 } 980 981 int bch2_write_super(struct bch_fs *c) 982 { 983 struct closure *cl = &c->sb_write; 984 struct printbuf err = PRINTBUF; 985 unsigned sb = 0, nr_wrote; 986 struct bch_devs_mask sb_written; 987 bool wrote, can_mount_without_written, can_mount_with_written; 988 unsigned degraded_flags = BCH_FORCE_IF_DEGRADED; 989 DARRAY(struct bch_dev *) online_devices = {}; 990 int ret = 0; 991 992 trace_and_count(c, write_super, c, _RET_IP_); 993 994 if (c->opts.very_degraded) 995 degraded_flags |= BCH_FORCE_IF_LOST; 996 997 lockdep_assert_held(&c->sb_lock); 998 999 closure_init_stack(cl); 1000 memset(&sb_written, 0, sizeof(sb_written)); 1001 1002 for_each_online_member(c, ca) { 1003 ret = darray_push(&online_devices, ca); 1004 if (bch2_fs_fatal_err_on(ret, c, "%s: error allocating online devices", __func__)) { 1005 percpu_ref_put(&ca->io_ref); 1006 goto out; 1007 } 1008 percpu_ref_get(&ca->io_ref); 1009 } 1010 1011 /* Make sure we're using the new magic numbers: */ 1012 c->disk_sb.sb->magic = BCHFS_MAGIC; 1013 c->disk_sb.sb->layout.magic = BCHFS_MAGIC; 1014 1015 le64_add_cpu(&c->disk_sb.sb->seq, 1); 1016 1017 struct bch_sb_field_members_v2 *mi = bch2_sb_field_get(c->disk_sb.sb, members_v2); 1018 darray_for_each(online_devices, ca) 1019 __bch2_members_v2_get_mut(mi, (*ca)->dev_idx)->seq = c->disk_sb.sb->seq; 1020 c->disk_sb.sb->write_time = cpu_to_le64(ktime_get_real_seconds()); 1021 1022 if (test_bit(BCH_FS_error, &c->flags)) 1023 SET_BCH_SB_HAS_ERRORS(c->disk_sb.sb, 1); 1024 if (test_bit(BCH_FS_topology_error, &c->flags)) 1025 SET_BCH_SB_HAS_TOPOLOGY_ERRORS(c->disk_sb.sb, 1); 1026 1027 SET_BCH_SB_BIG_ENDIAN(c->disk_sb.sb, CPU_BIG_ENDIAN); 1028 1029 bch2_sb_counters_from_cpu(c); 1030 bch2_sb_members_from_cpu(c); 1031 bch2_sb_members_cpy_v2_v1(&c->disk_sb); 1032 bch2_sb_errors_from_cpu(c); 1033 bch2_sb_downgrade_update(c); 1034 1035 darray_for_each(online_devices, ca) 1036 bch2_sb_from_fs(c, (*ca)); 1037 1038 darray_for_each(online_devices, ca) { 1039 printbuf_reset(&err); 1040 1041 ret = bch2_sb_validate(&(*ca)->disk_sb, BCH_VALIDATE_write, &err); 1042 if (ret) { 1043 bch2_fs_inconsistent(c, "sb invalid before write: %s", err.buf); 1044 goto out; 1045 } 1046 } 1047 1048 if (c->opts.nochanges) 1049 goto out; 1050 1051 /* 1052 * Defer writing the superblock until filesystem initialization is 1053 * complete - don't write out a partly initialized superblock: 1054 */ 1055 if (!BCH_SB_INITIALIZED(c->disk_sb.sb)) 1056 goto out; 1057 1058 if (le16_to_cpu(c->disk_sb.sb->version) > bcachefs_metadata_version_current) { 1059 struct printbuf buf = PRINTBUF; 1060 prt_printf(&buf, "attempting to write superblock that wasn't version downgraded ("); 1061 bch2_version_to_text(&buf, le16_to_cpu(c->disk_sb.sb->version)); 1062 prt_str(&buf, " > "); 1063 bch2_version_to_text(&buf, bcachefs_metadata_version_current); 1064 prt_str(&buf, ")"); 1065 bch2_fs_fatal_error(c, ": %s", buf.buf); 1066 printbuf_exit(&buf); 1067 return -BCH_ERR_sb_not_downgraded; 1068 } 1069 1070 darray_for_each(online_devices, ca) { 1071 __set_bit((*ca)->dev_idx, sb_written.d); 1072 (*ca)->sb_write_error = 0; 1073 } 1074 1075 darray_for_each(online_devices, ca) 1076 read_back_super(c, *ca); 1077 closure_sync(cl); 1078 1079 darray_for_each(online_devices, cap) { 1080 struct bch_dev *ca = *cap; 1081 1082 if (ca->sb_write_error) 1083 continue; 1084 1085 if (le64_to_cpu(ca->sb_read_scratch->seq) < ca->disk_sb.seq) { 1086 struct printbuf buf = PRINTBUF; 1087 prt_char(&buf, ' '); 1088 prt_bdevname(&buf, ca->disk_sb.bdev); 1089 prt_printf(&buf, 1090 ": Superblock write was silently dropped! (seq %llu expected %llu)", 1091 le64_to_cpu(ca->sb_read_scratch->seq), 1092 ca->disk_sb.seq); 1093 1094 if (c->opts.errors != BCH_ON_ERROR_continue && 1095 c->opts.errors != BCH_ON_ERROR_fix_safe) { 1096 ret = -BCH_ERR_erofs_sb_err; 1097 bch2_fs_fatal_error(c, "%s", buf.buf); 1098 } else { 1099 bch_err(c, "%s", buf.buf); 1100 } 1101 1102 printbuf_exit(&buf); 1103 } 1104 1105 if (le64_to_cpu(ca->sb_read_scratch->seq) > ca->disk_sb.seq) { 1106 struct printbuf buf = PRINTBUF; 1107 prt_char(&buf, ' '); 1108 prt_bdevname(&buf, ca->disk_sb.bdev); 1109 prt_printf(&buf, 1110 ": Superblock modified by another process (seq %llu expected %llu)", 1111 le64_to_cpu(ca->sb_read_scratch->seq), 1112 ca->disk_sb.seq); 1113 bch2_fs_fatal_error(c, "%s", buf.buf); 1114 printbuf_exit(&buf); 1115 ret = -BCH_ERR_erofs_sb_err; 1116 } 1117 } 1118 1119 if (ret) 1120 goto out; 1121 1122 do { 1123 wrote = false; 1124 darray_for_each(online_devices, cap) { 1125 struct bch_dev *ca = *cap; 1126 if (!ca->sb_write_error && 1127 sb < ca->disk_sb.sb->layout.nr_superblocks) { 1128 write_one_super(c, ca, sb); 1129 wrote = true; 1130 } 1131 } 1132 closure_sync(cl); 1133 sb++; 1134 } while (wrote); 1135 1136 darray_for_each(online_devices, cap) { 1137 struct bch_dev *ca = *cap; 1138 if (ca->sb_write_error) 1139 __clear_bit(ca->dev_idx, sb_written.d); 1140 else 1141 ca->disk_sb.seq = le64_to_cpu(ca->disk_sb.sb->seq); 1142 } 1143 1144 nr_wrote = dev_mask_nr(&sb_written); 1145 1146 can_mount_with_written = 1147 bch2_have_enough_devs(c, sb_written, degraded_flags, false); 1148 1149 for (unsigned i = 0; i < ARRAY_SIZE(sb_written.d); i++) 1150 sb_written.d[i] = ~sb_written.d[i]; 1151 1152 can_mount_without_written = 1153 bch2_have_enough_devs(c, sb_written, degraded_flags, false); 1154 1155 /* 1156 * If we would be able to mount _without_ the devices we successfully 1157 * wrote superblocks to, we weren't able to write to enough devices: 1158 * 1159 * Exception: if we can mount without the successes because we haven't 1160 * written anything (new filesystem), we continue if we'd be able to 1161 * mount with the devices we did successfully write to: 1162 */ 1163 if (bch2_fs_fatal_err_on(!nr_wrote || 1164 !can_mount_with_written || 1165 (can_mount_without_written && 1166 !can_mount_with_written), c, 1167 ": Unable to write superblock to sufficient devices (from %ps)", 1168 (void *) _RET_IP_)) 1169 ret = -1; 1170 out: 1171 /* Make new options visible after they're persistent: */ 1172 bch2_sb_update(c); 1173 darray_for_each(online_devices, ca) 1174 percpu_ref_put(&(*ca)->io_ref); 1175 darray_exit(&online_devices); 1176 printbuf_exit(&err); 1177 return ret; 1178 } 1179 1180 void __bch2_check_set_feature(struct bch_fs *c, unsigned feat) 1181 { 1182 mutex_lock(&c->sb_lock); 1183 if (!(c->sb.features & (1ULL << feat))) { 1184 c->disk_sb.sb->features[0] |= cpu_to_le64(1ULL << feat); 1185 1186 bch2_write_super(c); 1187 } 1188 mutex_unlock(&c->sb_lock); 1189 } 1190 1191 /* Downgrade if superblock is at a higher version than currently supported: */ 1192 bool bch2_check_version_downgrade(struct bch_fs *c) 1193 { 1194 bool ret = bcachefs_metadata_version_current < c->sb.version; 1195 1196 lockdep_assert_held(&c->sb_lock); 1197 1198 /* 1199 * Downgrade, if superblock is at a higher version than currently 1200 * supported: 1201 * 1202 * c->sb will be checked before we write the superblock, so update it as 1203 * well: 1204 */ 1205 if (BCH_SB_VERSION_UPGRADE_COMPLETE(c->disk_sb.sb) > bcachefs_metadata_version_current) 1206 SET_BCH_SB_VERSION_UPGRADE_COMPLETE(c->disk_sb.sb, bcachefs_metadata_version_current); 1207 if (BCH_SB_VERSION_INCOMPAT_ALLOWED(c->disk_sb.sb) > bcachefs_metadata_version_current) 1208 SET_BCH_SB_VERSION_INCOMPAT_ALLOWED(c->disk_sb.sb, bcachefs_metadata_version_current); 1209 if (c->sb.version > bcachefs_metadata_version_current) 1210 c->disk_sb.sb->version = cpu_to_le16(bcachefs_metadata_version_current); 1211 if (c->sb.version_min > bcachefs_metadata_version_current) 1212 c->disk_sb.sb->version_min = cpu_to_le16(bcachefs_metadata_version_current); 1213 c->disk_sb.sb->compat[0] &= cpu_to_le64((1ULL << BCH_COMPAT_NR) - 1); 1214 return ret; 1215 } 1216 1217 void bch2_sb_upgrade(struct bch_fs *c, unsigned new_version, bool incompat) 1218 { 1219 lockdep_assert_held(&c->sb_lock); 1220 1221 if (BCH_VERSION_MAJOR(new_version) > 1222 BCH_VERSION_MAJOR(le16_to_cpu(c->disk_sb.sb->version))) 1223 bch2_sb_field_resize(&c->disk_sb, downgrade, 0); 1224 1225 c->disk_sb.sb->version = cpu_to_le16(new_version); 1226 c->disk_sb.sb->features[0] |= cpu_to_le64(BCH_SB_FEATURES_ALL); 1227 1228 if (incompat) { 1229 SET_BCH_SB_VERSION_INCOMPAT_ALLOWED(c->disk_sb.sb, 1230 max(BCH_SB_VERSION_INCOMPAT_ALLOWED(c->disk_sb.sb), new_version)); 1231 c->disk_sb.sb->features[0] |= cpu_to_le64(BCH_FEATURE_incompat_version_field); 1232 } 1233 } 1234 1235 static int bch2_sb_ext_validate(struct bch_sb *sb, struct bch_sb_field *f, 1236 enum bch_validate_flags flags, struct printbuf *err) 1237 { 1238 if (vstruct_bytes(f) < 88) { 1239 prt_printf(err, "field too small (%zu < %u)", vstruct_bytes(f), 88); 1240 return -BCH_ERR_invalid_sb_ext; 1241 } 1242 1243 return 0; 1244 } 1245 1246 static void bch2_sb_ext_to_text(struct printbuf *out, struct bch_sb *sb, 1247 struct bch_sb_field *f) 1248 { 1249 struct bch_sb_field_ext *e = field_to_type(f, ext); 1250 1251 prt_printf(out, "Recovery passes required:\t"); 1252 prt_bitflags(out, bch2_recovery_passes, 1253 bch2_recovery_passes_from_stable(le64_to_cpu(e->recovery_passes_required[0]))); 1254 prt_newline(out); 1255 1256 unsigned long *errors_silent = kmalloc(sizeof(e->errors_silent), GFP_KERNEL); 1257 if (errors_silent) { 1258 le_bitvector_to_cpu(errors_silent, (void *) e->errors_silent, sizeof(e->errors_silent) * 8); 1259 1260 prt_printf(out, "Errors to silently fix:\t"); 1261 prt_bitflags_vector(out, bch2_sb_error_strs, errors_silent, 1262 min(BCH_FSCK_ERR_MAX, sizeof(e->errors_silent) * 8)); 1263 prt_newline(out); 1264 1265 kfree(errors_silent); 1266 } 1267 1268 prt_printf(out, "Btrees with missing data:\t"); 1269 prt_bitflags(out, __bch2_btree_ids, le64_to_cpu(e->btrees_lost_data)); 1270 prt_newline(out); 1271 } 1272 1273 static const struct bch_sb_field_ops bch_sb_field_ops_ext = { 1274 .validate = bch2_sb_ext_validate, 1275 .to_text = bch2_sb_ext_to_text, 1276 }; 1277 1278 static const struct bch_sb_field_ops *bch2_sb_field_ops[] = { 1279 #define x(f, nr) \ 1280 [BCH_SB_FIELD_##f] = &bch_sb_field_ops_##f, 1281 BCH_SB_FIELDS() 1282 #undef x 1283 }; 1284 1285 static const struct bch_sb_field_ops bch2_sb_field_null_ops; 1286 1287 static const struct bch_sb_field_ops *bch2_sb_field_type_ops(unsigned type) 1288 { 1289 return likely(type < ARRAY_SIZE(bch2_sb_field_ops)) 1290 ? bch2_sb_field_ops[type] 1291 : &bch2_sb_field_null_ops; 1292 } 1293 1294 static int bch2_sb_field_validate(struct bch_sb *sb, struct bch_sb_field *f, 1295 enum bch_validate_flags flags, struct printbuf *err) 1296 { 1297 unsigned type = le32_to_cpu(f->type); 1298 struct printbuf field_err = PRINTBUF; 1299 const struct bch_sb_field_ops *ops = bch2_sb_field_type_ops(type); 1300 int ret; 1301 1302 ret = ops->validate ? ops->validate(sb, f, flags, &field_err) : 0; 1303 if (ret) { 1304 prt_printf(err, "Invalid superblock section %s: %s", 1305 bch2_sb_fields[type], field_err.buf); 1306 prt_newline(err); 1307 bch2_sb_field_to_text(err, sb, f); 1308 } 1309 1310 printbuf_exit(&field_err); 1311 return ret; 1312 } 1313 1314 void __bch2_sb_field_to_text(struct printbuf *out, struct bch_sb *sb, 1315 struct bch_sb_field *f) 1316 { 1317 unsigned type = le32_to_cpu(f->type); 1318 const struct bch_sb_field_ops *ops = bch2_sb_field_type_ops(type); 1319 1320 if (!out->nr_tabstops) 1321 printbuf_tabstop_push(out, 32); 1322 1323 if (ops->to_text) 1324 ops->to_text(out, sb, f); 1325 } 1326 1327 void bch2_sb_field_to_text(struct printbuf *out, struct bch_sb *sb, 1328 struct bch_sb_field *f) 1329 { 1330 unsigned type = le32_to_cpu(f->type); 1331 1332 if (type < BCH_SB_FIELD_NR) 1333 prt_printf(out, "%s", bch2_sb_fields[type]); 1334 else 1335 prt_printf(out, "(unknown field %u)", type); 1336 1337 prt_printf(out, " (size %zu):", vstruct_bytes(f)); 1338 prt_newline(out); 1339 1340 __bch2_sb_field_to_text(out, sb, f); 1341 } 1342 1343 void bch2_sb_layout_to_text(struct printbuf *out, struct bch_sb_layout *l) 1344 { 1345 unsigned i; 1346 1347 prt_printf(out, "Type: %u", l->layout_type); 1348 prt_newline(out); 1349 1350 prt_str(out, "Superblock max size: "); 1351 prt_units_u64(out, 512 << l->sb_max_size_bits); 1352 prt_newline(out); 1353 1354 prt_printf(out, "Nr superblocks: %u", l->nr_superblocks); 1355 prt_newline(out); 1356 1357 prt_str(out, "Offsets: "); 1358 for (i = 0; i < l->nr_superblocks; i++) { 1359 if (i) 1360 prt_str(out, ", "); 1361 prt_printf(out, "%llu", le64_to_cpu(l->sb_offset[i])); 1362 } 1363 prt_newline(out); 1364 } 1365 1366 void bch2_sb_to_text(struct printbuf *out, struct bch_sb *sb, 1367 bool print_layout, unsigned fields) 1368 { 1369 if (!out->nr_tabstops) 1370 printbuf_tabstop_push(out, 44); 1371 1372 prt_printf(out, "External UUID:\t"); 1373 pr_uuid(out, sb->user_uuid.b); 1374 prt_newline(out); 1375 1376 prt_printf(out, "Internal UUID:\t"); 1377 pr_uuid(out, sb->uuid.b); 1378 prt_newline(out); 1379 1380 prt_printf(out, "Magic number:\t"); 1381 pr_uuid(out, sb->magic.b); 1382 prt_newline(out); 1383 1384 prt_printf(out, "Device index:\t%u\n", sb->dev_idx); 1385 1386 prt_printf(out, "Label:\t"); 1387 if (!strlen(sb->label)) 1388 prt_printf(out, "(none)"); 1389 else 1390 prt_printf(out, "%.*s", (int) sizeof(sb->label), sb->label); 1391 prt_newline(out); 1392 1393 prt_printf(out, "Version:\t"); 1394 bch2_version_to_text(out, le16_to_cpu(sb->version)); 1395 prt_newline(out); 1396 1397 prt_printf(out, "Incompatible features allowed:\t"); 1398 bch2_version_to_text(out, BCH_SB_VERSION_INCOMPAT_ALLOWED(sb)); 1399 prt_newline(out); 1400 1401 prt_printf(out, "Incompatible features in use:\t"); 1402 bch2_version_to_text(out, BCH_SB_VERSION_INCOMPAT(sb)); 1403 prt_newline(out); 1404 1405 prt_printf(out, "Version upgrade complete:\t"); 1406 bch2_version_to_text(out, BCH_SB_VERSION_UPGRADE_COMPLETE(sb)); 1407 prt_newline(out); 1408 1409 prt_printf(out, "Oldest version on disk:\t"); 1410 bch2_version_to_text(out, le16_to_cpu(sb->version_min)); 1411 prt_newline(out); 1412 1413 prt_printf(out, "Created:\t"); 1414 if (sb->time_base_lo) 1415 bch2_prt_datetime(out, div_u64(le64_to_cpu(sb->time_base_lo), NSEC_PER_SEC)); 1416 else 1417 prt_printf(out, "(not set)"); 1418 prt_newline(out); 1419 1420 prt_printf(out, "Sequence number:\t"); 1421 prt_printf(out, "%llu", le64_to_cpu(sb->seq)); 1422 prt_newline(out); 1423 1424 prt_printf(out, "Time of last write:\t"); 1425 bch2_prt_datetime(out, le64_to_cpu(sb->write_time)); 1426 prt_newline(out); 1427 1428 prt_printf(out, "Superblock size:\t"); 1429 prt_units_u64(out, vstruct_bytes(sb)); 1430 prt_str(out, "/"); 1431 prt_units_u64(out, 512ULL << sb->layout.sb_max_size_bits); 1432 prt_newline(out); 1433 1434 prt_printf(out, "Clean:\t%llu\n", BCH_SB_CLEAN(sb)); 1435 prt_printf(out, "Devices:\t%u\n", bch2_sb_nr_devices(sb)); 1436 1437 prt_printf(out, "Sections:\t"); 1438 u64 fields_have = 0; 1439 vstruct_for_each(sb, f) 1440 fields_have |= 1 << le32_to_cpu(f->type); 1441 prt_bitflags(out, bch2_sb_fields, fields_have); 1442 prt_newline(out); 1443 1444 prt_printf(out, "Features:\t"); 1445 prt_bitflags(out, bch2_sb_features, le64_to_cpu(sb->features[0])); 1446 prt_newline(out); 1447 1448 prt_printf(out, "Compat features:\t"); 1449 prt_bitflags(out, bch2_sb_compat, le64_to_cpu(sb->compat[0])); 1450 prt_newline(out); 1451 1452 prt_newline(out); 1453 prt_printf(out, "Options:"); 1454 prt_newline(out); 1455 printbuf_indent_add(out, 2); 1456 { 1457 enum bch_opt_id id; 1458 1459 for (id = 0; id < bch2_opts_nr; id++) { 1460 const struct bch_option *opt = bch2_opt_table + id; 1461 1462 if (opt->get_sb != BCH2_NO_SB_OPT) { 1463 u64 v = bch2_opt_from_sb(sb, id); 1464 1465 prt_printf(out, "%s:\t", opt->attr.name); 1466 bch2_opt_to_text(out, NULL, sb, opt, v, 1467 OPT_HUMAN_READABLE|OPT_SHOW_FULL_LIST); 1468 prt_newline(out); 1469 } 1470 } 1471 } 1472 1473 printbuf_indent_sub(out, 2); 1474 1475 if (print_layout) { 1476 prt_newline(out); 1477 prt_printf(out, "layout:"); 1478 prt_newline(out); 1479 printbuf_indent_add(out, 2); 1480 bch2_sb_layout_to_text(out, &sb->layout); 1481 printbuf_indent_sub(out, 2); 1482 } 1483 1484 vstruct_for_each(sb, f) 1485 if (fields & (1 << le32_to_cpu(f->type))) { 1486 prt_newline(out); 1487 bch2_sb_field_to_text(out, sb, f); 1488 } 1489 } 1490