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 27 static const struct blk_holder_ops bch2_sb_handle_bdev_ops = { 28 }; 29 30 struct bch2_metadata_version { 31 u16 version; 32 const char *name; 33 }; 34 35 static const struct bch2_metadata_version bch2_metadata_versions[] = { 36 #define x(n, v) { \ 37 .version = v, \ 38 .name = #n, \ 39 }, 40 BCH_METADATA_VERSIONS() 41 #undef x 42 }; 43 44 void bch2_version_to_text(struct printbuf *out, unsigned v) 45 { 46 const char *str = "(unknown version)"; 47 48 for (unsigned i = 0; i < ARRAY_SIZE(bch2_metadata_versions); i++) 49 if (bch2_metadata_versions[i].version == v) { 50 str = bch2_metadata_versions[i].name; 51 break; 52 } 53 54 prt_printf(out, "%u.%u: %s", BCH_VERSION_MAJOR(v), BCH_VERSION_MINOR(v), str); 55 } 56 57 unsigned bch2_latest_compatible_version(unsigned v) 58 { 59 if (!BCH_VERSION_MAJOR(v)) 60 return v; 61 62 for (unsigned i = 0; i < ARRAY_SIZE(bch2_metadata_versions); i++) 63 if (bch2_metadata_versions[i].version > v && 64 BCH_VERSION_MAJOR(bch2_metadata_versions[i].version) == 65 BCH_VERSION_MAJOR(v)) 66 v = bch2_metadata_versions[i].version; 67 68 return v; 69 } 70 71 const char * const bch2_sb_fields[] = { 72 #define x(name, nr) #name, 73 BCH_SB_FIELDS() 74 #undef x 75 NULL 76 }; 77 78 static int bch2_sb_field_validate(struct bch_sb *, struct bch_sb_field *, 79 enum bch_validate_flags, struct printbuf *); 80 81 struct bch_sb_field *bch2_sb_field_get_id(struct bch_sb *sb, 82 enum bch_sb_field_type type) 83 { 84 /* XXX: need locking around superblock to access optional fields */ 85 86 vstruct_for_each(sb, f) 87 if (le32_to_cpu(f->type) == type) 88 return f; 89 return NULL; 90 } 91 92 static struct bch_sb_field *__bch2_sb_field_resize(struct bch_sb_handle *sb, 93 struct bch_sb_field *f, 94 unsigned u64s) 95 { 96 unsigned old_u64s = f ? le32_to_cpu(f->u64s) : 0; 97 unsigned sb_u64s = le32_to_cpu(sb->sb->u64s) + u64s - old_u64s; 98 99 BUG_ON(__vstruct_bytes(struct bch_sb, sb_u64s) > sb->buffer_size); 100 101 if (!f && !u64s) { 102 /* nothing to do: */ 103 } else if (!f) { 104 f = vstruct_last(sb->sb); 105 memset(f, 0, sizeof(u64) * u64s); 106 f->u64s = cpu_to_le32(u64s); 107 f->type = 0; 108 } else { 109 void *src, *dst; 110 111 src = vstruct_end(f); 112 113 if (u64s) { 114 f->u64s = cpu_to_le32(u64s); 115 dst = vstruct_end(f); 116 } else { 117 dst = f; 118 } 119 120 memmove(dst, src, vstruct_end(sb->sb) - src); 121 122 if (dst > src) 123 memset(src, 0, dst - src); 124 } 125 126 sb->sb->u64s = cpu_to_le32(sb_u64s); 127 128 return u64s ? f : NULL; 129 } 130 131 void bch2_sb_field_delete(struct bch_sb_handle *sb, 132 enum bch_sb_field_type type) 133 { 134 struct bch_sb_field *f = bch2_sb_field_get_id(sb->sb, type); 135 136 if (f) 137 __bch2_sb_field_resize(sb, f, 0); 138 } 139 140 /* Superblock realloc/free: */ 141 142 void bch2_free_super(struct bch_sb_handle *sb) 143 { 144 kfree(sb->bio); 145 if (!IS_ERR_OR_NULL(sb->s_bdev_file)) 146 bdev_fput(sb->s_bdev_file); 147 kfree(sb->holder); 148 kfree(sb->sb_name); 149 150 kfree(sb->sb); 151 memset(sb, 0, sizeof(*sb)); 152 } 153 154 int bch2_sb_realloc(struct bch_sb_handle *sb, unsigned u64s) 155 { 156 size_t new_bytes = __vstruct_bytes(struct bch_sb, u64s); 157 size_t new_buffer_size; 158 struct bch_sb *new_sb; 159 struct bio *bio; 160 161 if (sb->bdev) 162 new_bytes = max_t(size_t, new_bytes, bdev_logical_block_size(sb->bdev)); 163 164 new_buffer_size = roundup_pow_of_two(new_bytes); 165 166 if (sb->sb && sb->buffer_size >= new_buffer_size) 167 return 0; 168 169 if (sb->sb && sb->have_layout) { 170 u64 max_bytes = 512 << sb->sb->layout.sb_max_size_bits; 171 172 if (new_bytes > max_bytes) { 173 struct printbuf buf = PRINTBUF; 174 175 prt_bdevname(&buf, sb->bdev); 176 prt_printf(&buf, ": superblock too big: want %zu but have %llu", new_bytes, max_bytes); 177 pr_err("%s", buf.buf); 178 printbuf_exit(&buf); 179 return -BCH_ERR_ENOSPC_sb; 180 } 181 } 182 183 if (sb->buffer_size >= new_buffer_size && sb->sb) 184 return 0; 185 186 if (dynamic_fault("bcachefs:add:super_realloc")) 187 return -BCH_ERR_ENOMEM_sb_realloc_injected; 188 189 new_sb = krealloc(sb->sb, new_buffer_size, GFP_NOFS|__GFP_ZERO); 190 if (!new_sb) 191 return -BCH_ERR_ENOMEM_sb_buf_realloc; 192 193 sb->sb = new_sb; 194 195 if (sb->have_bio) { 196 unsigned nr_bvecs = buf_pages(sb->sb, new_buffer_size); 197 198 bio = bio_kmalloc(nr_bvecs, GFP_KERNEL); 199 if (!bio) 200 return -BCH_ERR_ENOMEM_sb_bio_realloc; 201 202 bio_init(bio, NULL, bio->bi_inline_vecs, nr_bvecs, 0); 203 204 kfree(sb->bio); 205 sb->bio = bio; 206 } 207 208 sb->buffer_size = new_buffer_size; 209 210 return 0; 211 } 212 213 struct bch_sb_field *bch2_sb_field_resize_id(struct bch_sb_handle *sb, 214 enum bch_sb_field_type type, 215 unsigned u64s) 216 { 217 struct bch_sb_field *f = bch2_sb_field_get_id(sb->sb, type); 218 ssize_t old_u64s = f ? le32_to_cpu(f->u64s) : 0; 219 ssize_t d = -old_u64s + u64s; 220 221 if (bch2_sb_realloc(sb, le32_to_cpu(sb->sb->u64s) + d)) 222 return NULL; 223 224 if (sb->fs_sb) { 225 struct bch_fs *c = container_of(sb, struct bch_fs, disk_sb); 226 227 lockdep_assert_held(&c->sb_lock); 228 229 /* XXX: we're not checking that offline device have enough space */ 230 231 for_each_online_member(c, ca) { 232 struct bch_sb_handle *dev_sb = &ca->disk_sb; 233 234 if (bch2_sb_realloc(dev_sb, le32_to_cpu(dev_sb->sb->u64s) + d)) { 235 percpu_ref_put(&ca->io_ref); 236 return NULL; 237 } 238 } 239 } 240 241 f = bch2_sb_field_get_id(sb->sb, type); 242 f = __bch2_sb_field_resize(sb, f, u64s); 243 if (f) 244 f->type = cpu_to_le32(type); 245 return f; 246 } 247 248 struct bch_sb_field *bch2_sb_field_get_minsize_id(struct bch_sb_handle *sb, 249 enum bch_sb_field_type type, 250 unsigned u64s) 251 { 252 struct bch_sb_field *f = bch2_sb_field_get_id(sb->sb, type); 253 254 if (!f || le32_to_cpu(f->u64s) < u64s) 255 f = bch2_sb_field_resize_id(sb, type, u64s); 256 return f; 257 } 258 259 /* Superblock validate: */ 260 261 static int validate_sb_layout(struct bch_sb_layout *layout, struct printbuf *out) 262 { 263 u64 offset, prev_offset, max_sectors; 264 unsigned i; 265 266 BUILD_BUG_ON(sizeof(struct bch_sb_layout) != 512); 267 268 if (!uuid_equal(&layout->magic, &BCACHE_MAGIC) && 269 !uuid_equal(&layout->magic, &BCHFS_MAGIC)) { 270 prt_printf(out, "Not a bcachefs superblock layout"); 271 return -BCH_ERR_invalid_sb_layout; 272 } 273 274 if (layout->layout_type != 0) { 275 prt_printf(out, "Invalid superblock layout type %u", 276 layout->layout_type); 277 return -BCH_ERR_invalid_sb_layout_type; 278 } 279 280 if (!layout->nr_superblocks) { 281 prt_printf(out, "Invalid superblock layout: no superblocks"); 282 return -BCH_ERR_invalid_sb_layout_nr_superblocks; 283 } 284 285 if (layout->nr_superblocks > ARRAY_SIZE(layout->sb_offset)) { 286 prt_printf(out, "Invalid superblock layout: too many superblocks"); 287 return -BCH_ERR_invalid_sb_layout_nr_superblocks; 288 } 289 290 max_sectors = 1 << layout->sb_max_size_bits; 291 292 prev_offset = le64_to_cpu(layout->sb_offset[0]); 293 294 for (i = 1; i < layout->nr_superblocks; i++) { 295 offset = le64_to_cpu(layout->sb_offset[i]); 296 297 if (offset < prev_offset + max_sectors) { 298 prt_printf(out, "Invalid superblock layout: superblocks overlap\n" 299 " (sb %u ends at %llu next starts at %llu", 300 i - 1, prev_offset + max_sectors, offset); 301 return -BCH_ERR_invalid_sb_layout_superblocks_overlap; 302 } 303 prev_offset = offset; 304 } 305 306 return 0; 307 } 308 309 static int bch2_sb_compatible(struct bch_sb *sb, struct printbuf *out) 310 { 311 u16 version = le16_to_cpu(sb->version); 312 u16 version_min = le16_to_cpu(sb->version_min); 313 314 if (!bch2_version_compatible(version)) { 315 prt_str(out, "Unsupported superblock version "); 316 bch2_version_to_text(out, version); 317 prt_str(out, " (min "); 318 bch2_version_to_text(out, bcachefs_metadata_version_min); 319 prt_str(out, ", max "); 320 bch2_version_to_text(out, bcachefs_metadata_version_current); 321 prt_str(out, ")"); 322 return -BCH_ERR_invalid_sb_version; 323 } 324 325 if (!bch2_version_compatible(version_min)) { 326 prt_str(out, "Unsupported superblock version_min "); 327 bch2_version_to_text(out, version_min); 328 prt_str(out, " (min "); 329 bch2_version_to_text(out, bcachefs_metadata_version_min); 330 prt_str(out, ", max "); 331 bch2_version_to_text(out, bcachefs_metadata_version_current); 332 prt_str(out, ")"); 333 return -BCH_ERR_invalid_sb_version; 334 } 335 336 if (version_min > version) { 337 prt_str(out, "Bad minimum version "); 338 bch2_version_to_text(out, version_min); 339 prt_str(out, ", greater than version field "); 340 bch2_version_to_text(out, version); 341 return -BCH_ERR_invalid_sb_version; 342 } 343 344 return 0; 345 } 346 347 static int bch2_sb_validate(struct bch_sb_handle *disk_sb, 348 enum bch_validate_flags flags, struct printbuf *out) 349 { 350 struct bch_sb *sb = disk_sb->sb; 351 struct bch_sb_field_members_v1 *mi; 352 enum bch_opt_id opt_id; 353 u16 block_size; 354 int ret; 355 356 ret = bch2_sb_compatible(sb, out); 357 if (ret) 358 return ret; 359 360 if (sb->features[1] || 361 (le64_to_cpu(sb->features[0]) & (~0ULL << BCH_FEATURE_NR))) { 362 prt_printf(out, "Filesystem has incompatible features"); 363 return -BCH_ERR_invalid_sb_features; 364 } 365 366 block_size = le16_to_cpu(sb->block_size); 367 368 if (block_size > PAGE_SECTORS) { 369 prt_printf(out, "Block size too big (got %u, max %u)", 370 block_size, PAGE_SECTORS); 371 return -BCH_ERR_invalid_sb_block_size; 372 } 373 374 if (bch2_is_zero(sb->user_uuid.b, sizeof(sb->user_uuid))) { 375 prt_printf(out, "Bad user UUID (got zeroes)"); 376 return -BCH_ERR_invalid_sb_uuid; 377 } 378 379 if (bch2_is_zero(sb->uuid.b, sizeof(sb->uuid))) { 380 prt_printf(out, "Bad internal UUID (got zeroes)"); 381 return -BCH_ERR_invalid_sb_uuid; 382 } 383 384 if (!sb->nr_devices || 385 sb->nr_devices > BCH_SB_MEMBERS_MAX) { 386 prt_printf(out, "Bad number of member devices %u (max %u)", 387 sb->nr_devices, BCH_SB_MEMBERS_MAX); 388 return -BCH_ERR_invalid_sb_too_many_members; 389 } 390 391 if (sb->dev_idx >= sb->nr_devices) { 392 prt_printf(out, "Bad dev_idx (got %u, nr_devices %u)", 393 sb->dev_idx, sb->nr_devices); 394 return -BCH_ERR_invalid_sb_dev_idx; 395 } 396 397 if (!sb->time_precision || 398 le32_to_cpu(sb->time_precision) > NSEC_PER_SEC) { 399 prt_printf(out, "Invalid time precision: %u (min 1, max %lu)", 400 le32_to_cpu(sb->time_precision), NSEC_PER_SEC); 401 return -BCH_ERR_invalid_sb_time_precision; 402 } 403 404 if (!flags) { 405 /* 406 * Been seeing a bug where these are getting inexplicably 407 * zeroed, so we're now validating them, but we have to be 408 * careful not to preven people's filesystems from mounting: 409 */ 410 if (!BCH_SB_JOURNAL_FLUSH_DELAY(sb)) 411 SET_BCH_SB_JOURNAL_FLUSH_DELAY(sb, 1000); 412 if (!BCH_SB_JOURNAL_RECLAIM_DELAY(sb)) 413 SET_BCH_SB_JOURNAL_RECLAIM_DELAY(sb, 1000); 414 415 if (!BCH_SB_VERSION_UPGRADE_COMPLETE(sb)) 416 SET_BCH_SB_VERSION_UPGRADE_COMPLETE(sb, le16_to_cpu(sb->version)); 417 418 if (le16_to_cpu(sb->version) <= bcachefs_metadata_version_disk_accounting_v2 && 419 !BCH_SB_ALLOCATOR_STUCK_TIMEOUT(sb)) 420 SET_BCH_SB_ALLOCATOR_STUCK_TIMEOUT(sb, 30); 421 } 422 423 for (opt_id = 0; opt_id < bch2_opts_nr; opt_id++) { 424 const struct bch_option *opt = bch2_opt_table + opt_id; 425 426 if (opt->get_sb != BCH2_NO_SB_OPT) { 427 u64 v = bch2_opt_from_sb(sb, opt_id); 428 429 prt_printf(out, "Invalid option "); 430 ret = bch2_opt_validate(opt, v, out); 431 if (ret) 432 return ret; 433 434 printbuf_reset(out); 435 } 436 } 437 438 /* validate layout */ 439 ret = validate_sb_layout(&sb->layout, out); 440 if (ret) 441 return ret; 442 443 vstruct_for_each(sb, f) { 444 if (!f->u64s) { 445 prt_printf(out, "Invalid superblock: optional field with size 0 (type %u)", 446 le32_to_cpu(f->type)); 447 return -BCH_ERR_invalid_sb_field_size; 448 } 449 450 if (vstruct_next(f) > vstruct_last(sb)) { 451 prt_printf(out, "Invalid superblock: optional field extends past end of superblock (type %u)", 452 le32_to_cpu(f->type)); 453 return -BCH_ERR_invalid_sb_field_size; 454 } 455 } 456 457 /* members must be validated first: */ 458 mi = bch2_sb_field_get(sb, members_v1); 459 if (!mi) { 460 prt_printf(out, "Invalid superblock: member info area missing"); 461 return -BCH_ERR_invalid_sb_members_missing; 462 } 463 464 ret = bch2_sb_field_validate(sb, &mi->field, flags, out); 465 if (ret) 466 return ret; 467 468 vstruct_for_each(sb, f) { 469 if (le32_to_cpu(f->type) == BCH_SB_FIELD_members_v1) 470 continue; 471 472 ret = bch2_sb_field_validate(sb, f, flags, out); 473 if (ret) 474 return ret; 475 } 476 477 if ((flags & BCH_VALIDATE_write) && 478 bch2_sb_member_get(sb, sb->dev_idx).seq != sb->seq) { 479 prt_printf(out, "Invalid superblock: member seq %llu != sb seq %llu", 480 le64_to_cpu(bch2_sb_member_get(sb, sb->dev_idx).seq), 481 le64_to_cpu(sb->seq)); 482 return -BCH_ERR_invalid_sb_members_missing; 483 } 484 485 return 0; 486 } 487 488 /* device open: */ 489 490 static unsigned long le_ulong_to_cpu(unsigned long v) 491 { 492 return sizeof(unsigned long) == 8 493 ? le64_to_cpu(v) 494 : le32_to_cpu(v); 495 } 496 497 static void le_bitvector_to_cpu(unsigned long *dst, unsigned long *src, unsigned nr) 498 { 499 BUG_ON(nr & (BITS_PER_TYPE(long) - 1)); 500 501 for (unsigned i = 0; i < BITS_TO_LONGS(nr); i++) 502 dst[i] = le_ulong_to_cpu(src[i]); 503 } 504 505 static void bch2_sb_update(struct bch_fs *c) 506 { 507 struct bch_sb *src = c->disk_sb.sb; 508 509 lockdep_assert_held(&c->sb_lock); 510 511 c->sb.uuid = src->uuid; 512 c->sb.user_uuid = src->user_uuid; 513 c->sb.version = le16_to_cpu(src->version); 514 c->sb.version_min = le16_to_cpu(src->version_min); 515 c->sb.version_upgrade_complete = BCH_SB_VERSION_UPGRADE_COMPLETE(src); 516 c->sb.nr_devices = src->nr_devices; 517 c->sb.clean = BCH_SB_CLEAN(src); 518 c->sb.encryption_type = BCH_SB_ENCRYPTION_TYPE(src); 519 520 c->sb.nsec_per_time_unit = le32_to_cpu(src->time_precision); 521 c->sb.time_units_per_sec = NSEC_PER_SEC / c->sb.nsec_per_time_unit; 522 523 /* XXX this is wrong, we need a 96 or 128 bit integer type */ 524 c->sb.time_base_lo = div_u64(le64_to_cpu(src->time_base_lo), 525 c->sb.nsec_per_time_unit); 526 c->sb.time_base_hi = le32_to_cpu(src->time_base_hi); 527 528 c->sb.features = le64_to_cpu(src->features[0]); 529 c->sb.compat = le64_to_cpu(src->compat[0]); 530 531 memset(c->sb.errors_silent, 0, sizeof(c->sb.errors_silent)); 532 533 struct bch_sb_field_ext *ext = bch2_sb_field_get(src, ext); 534 if (ext) { 535 le_bitvector_to_cpu(c->sb.errors_silent, (void *) ext->errors_silent, 536 sizeof(c->sb.errors_silent) * 8); 537 c->sb.btrees_lost_data = le64_to_cpu(ext->btrees_lost_data); 538 } 539 540 for_each_member_device(c, ca) { 541 struct bch_member m = bch2_sb_member_get(src, ca->dev_idx); 542 ca->mi = bch2_mi_to_cpu(&m); 543 } 544 } 545 546 static int __copy_super(struct bch_sb_handle *dst_handle, struct bch_sb *src) 547 { 548 struct bch_sb_field *src_f, *dst_f; 549 struct bch_sb *dst = dst_handle->sb; 550 unsigned i; 551 552 dst->version = src->version; 553 dst->version_min = src->version_min; 554 dst->seq = src->seq; 555 dst->uuid = src->uuid; 556 dst->user_uuid = src->user_uuid; 557 memcpy(dst->label, src->label, sizeof(dst->label)); 558 559 dst->block_size = src->block_size; 560 dst->nr_devices = src->nr_devices; 561 562 dst->time_base_lo = src->time_base_lo; 563 dst->time_base_hi = src->time_base_hi; 564 dst->time_precision = src->time_precision; 565 dst->write_time = src->write_time; 566 567 memcpy(dst->flags, src->flags, sizeof(dst->flags)); 568 memcpy(dst->features, src->features, sizeof(dst->features)); 569 memcpy(dst->compat, src->compat, sizeof(dst->compat)); 570 571 for (i = 0; i < BCH_SB_FIELD_NR; i++) { 572 int d; 573 574 if ((1U << i) & BCH_SINGLE_DEVICE_SB_FIELDS) 575 continue; 576 577 src_f = bch2_sb_field_get_id(src, i); 578 dst_f = bch2_sb_field_get_id(dst, i); 579 580 d = (src_f ? le32_to_cpu(src_f->u64s) : 0) - 581 (dst_f ? le32_to_cpu(dst_f->u64s) : 0); 582 if (d > 0) { 583 int ret = bch2_sb_realloc(dst_handle, 584 le32_to_cpu(dst_handle->sb->u64s) + d); 585 586 if (ret) 587 return ret; 588 589 dst = dst_handle->sb; 590 dst_f = bch2_sb_field_get_id(dst, i); 591 } 592 593 dst_f = __bch2_sb_field_resize(dst_handle, dst_f, 594 src_f ? le32_to_cpu(src_f->u64s) : 0); 595 596 if (src_f) 597 memcpy(dst_f, src_f, vstruct_bytes(src_f)); 598 } 599 600 return 0; 601 } 602 603 int bch2_sb_to_fs(struct bch_fs *c, struct bch_sb *src) 604 { 605 int ret; 606 607 lockdep_assert_held(&c->sb_lock); 608 609 ret = bch2_sb_realloc(&c->disk_sb, 0) ?: 610 __copy_super(&c->disk_sb, src) ?: 611 bch2_sb_replicas_to_cpu_replicas(c) ?: 612 bch2_sb_disk_groups_to_cpu(c); 613 if (ret) 614 return ret; 615 616 bch2_sb_update(c); 617 return 0; 618 } 619 620 int bch2_sb_from_fs(struct bch_fs *c, struct bch_dev *ca) 621 { 622 return __copy_super(&ca->disk_sb, c->disk_sb.sb); 623 } 624 625 /* read superblock: */ 626 627 static int read_one_super(struct bch_sb_handle *sb, u64 offset, struct printbuf *err) 628 { 629 size_t bytes; 630 int ret; 631 reread: 632 bio_reset(sb->bio, sb->bdev, REQ_OP_READ|REQ_SYNC|REQ_META); 633 sb->bio->bi_iter.bi_sector = offset; 634 bch2_bio_map(sb->bio, sb->sb, sb->buffer_size); 635 636 ret = submit_bio_wait(sb->bio); 637 if (ret) { 638 prt_printf(err, "IO error: %i", ret); 639 return ret; 640 } 641 642 if (!uuid_equal(&sb->sb->magic, &BCACHE_MAGIC) && 643 !uuid_equal(&sb->sb->magic, &BCHFS_MAGIC)) { 644 prt_str(err, "Not a bcachefs superblock (got magic "); 645 pr_uuid(err, sb->sb->magic.b); 646 prt_str(err, ")"); 647 return -BCH_ERR_invalid_sb_magic; 648 } 649 650 ret = bch2_sb_compatible(sb->sb, err); 651 if (ret) 652 return ret; 653 654 bytes = vstruct_bytes(sb->sb); 655 656 u64 sb_size = 512ULL << min(BCH_SB_LAYOUT_SIZE_BITS_MAX, sb->sb->layout.sb_max_size_bits); 657 if (bytes > sb_size) { 658 prt_printf(err, "Invalid superblock: too big (got %zu bytes, layout max %llu)", 659 bytes, sb_size); 660 return -BCH_ERR_invalid_sb_too_big; 661 } 662 663 if (bytes > sb->buffer_size) { 664 ret = bch2_sb_realloc(sb, le32_to_cpu(sb->sb->u64s)); 665 if (ret) 666 return ret; 667 goto reread; 668 } 669 670 enum bch_csum_type csum_type = BCH_SB_CSUM_TYPE(sb->sb); 671 if (csum_type >= BCH_CSUM_NR) { 672 prt_printf(err, "unknown checksum type %llu", BCH_SB_CSUM_TYPE(sb->sb)); 673 return -BCH_ERR_invalid_sb_csum_type; 674 } 675 676 /* XXX: verify MACs */ 677 struct bch_csum csum = csum_vstruct(NULL, csum_type, null_nonce(), sb->sb); 678 if (bch2_crc_cmp(csum, sb->sb->csum)) { 679 bch2_csum_err_msg(err, csum_type, sb->sb->csum, csum); 680 return -BCH_ERR_invalid_sb_csum; 681 } 682 683 sb->seq = le64_to_cpu(sb->sb->seq); 684 685 return 0; 686 } 687 688 static int __bch2_read_super(const char *path, struct bch_opts *opts, 689 struct bch_sb_handle *sb, bool ignore_notbchfs_msg) 690 { 691 u64 offset = opt_get(*opts, sb); 692 struct bch_sb_layout layout; 693 struct printbuf err = PRINTBUF; 694 struct printbuf err2 = PRINTBUF; 695 __le64 *i; 696 int ret; 697 #ifndef __KERNEL__ 698 retry: 699 #endif 700 memset(sb, 0, sizeof(*sb)); 701 sb->mode = BLK_OPEN_READ; 702 sb->have_bio = true; 703 sb->holder = kmalloc(1, GFP_KERNEL); 704 if (!sb->holder) 705 return -ENOMEM; 706 707 sb->sb_name = kstrdup(path, GFP_KERNEL); 708 if (!sb->sb_name) { 709 ret = -ENOMEM; 710 prt_printf(&err, "error allocating memory for sb_name"); 711 goto err; 712 } 713 714 #ifndef __KERNEL__ 715 if (opt_get(*opts, direct_io) == false) 716 sb->mode |= BLK_OPEN_BUFFERED; 717 #endif 718 719 if (!opt_get(*opts, noexcl)) 720 sb->mode |= BLK_OPEN_EXCL; 721 722 if (!opt_get(*opts, nochanges)) 723 sb->mode |= BLK_OPEN_WRITE; 724 725 sb->s_bdev_file = bdev_file_open_by_path(path, sb->mode, sb->holder, &bch2_sb_handle_bdev_ops); 726 if (IS_ERR(sb->s_bdev_file) && 727 PTR_ERR(sb->s_bdev_file) == -EACCES && 728 opt_get(*opts, read_only)) { 729 sb->mode &= ~BLK_OPEN_WRITE; 730 731 sb->s_bdev_file = bdev_file_open_by_path(path, sb->mode, sb->holder, &bch2_sb_handle_bdev_ops); 732 if (!IS_ERR(sb->s_bdev_file)) 733 opt_set(*opts, nochanges, true); 734 } 735 736 if (IS_ERR(sb->s_bdev_file)) { 737 ret = PTR_ERR(sb->s_bdev_file); 738 prt_printf(&err, "error opening %s: %s", path, bch2_err_str(ret)); 739 goto err; 740 } 741 sb->bdev = file_bdev(sb->s_bdev_file); 742 743 ret = bch2_sb_realloc(sb, 0); 744 if (ret) { 745 prt_printf(&err, "error allocating memory for superblock"); 746 goto err; 747 } 748 749 if (bch2_fs_init_fault("read_super")) { 750 prt_printf(&err, "dynamic fault"); 751 ret = -EFAULT; 752 goto err; 753 } 754 755 ret = read_one_super(sb, offset, &err); 756 if (!ret) 757 goto got_super; 758 759 if (opt_defined(*opts, sb)) 760 goto err; 761 762 prt_printf(&err2, "bcachefs (%s): error reading default superblock: %s\n", 763 path, err.buf); 764 if (ret == -BCH_ERR_invalid_sb_magic && ignore_notbchfs_msg) 765 bch2_print_opts(opts, KERN_INFO "%s", err2.buf); 766 else 767 bch2_print_opts(opts, KERN_ERR "%s", err2.buf); 768 769 printbuf_exit(&err2); 770 printbuf_reset(&err); 771 772 /* 773 * Error reading primary superblock - read location of backup 774 * superblocks: 775 */ 776 bio_reset(sb->bio, sb->bdev, REQ_OP_READ|REQ_SYNC|REQ_META); 777 sb->bio->bi_iter.bi_sector = BCH_SB_LAYOUT_SECTOR; 778 /* 779 * use sb buffer to read layout, since sb buffer is page aligned but 780 * layout won't be: 781 */ 782 bch2_bio_map(sb->bio, sb->sb, sizeof(struct bch_sb_layout)); 783 784 ret = submit_bio_wait(sb->bio); 785 if (ret) { 786 prt_printf(&err, "IO error: %i", ret); 787 goto err; 788 } 789 790 memcpy(&layout, sb->sb, sizeof(layout)); 791 ret = validate_sb_layout(&layout, &err); 792 if (ret) 793 goto err; 794 795 for (i = layout.sb_offset; 796 i < layout.sb_offset + layout.nr_superblocks; i++) { 797 offset = le64_to_cpu(*i); 798 799 if (offset == opt_get(*opts, sb)) 800 continue; 801 802 ret = read_one_super(sb, offset, &err); 803 if (!ret) 804 goto got_super; 805 } 806 807 goto err; 808 809 got_super: 810 if (le16_to_cpu(sb->sb->block_size) << 9 < 811 bdev_logical_block_size(sb->bdev) && 812 opt_get(*opts, direct_io)) { 813 #ifndef __KERNEL__ 814 opt_set(*opts, direct_io, false); 815 bch2_free_super(sb); 816 goto retry; 817 #endif 818 prt_printf(&err, "block size (%u) smaller than device block size (%u)", 819 le16_to_cpu(sb->sb->block_size) << 9, 820 bdev_logical_block_size(sb->bdev)); 821 ret = -BCH_ERR_block_size_too_small; 822 goto err; 823 } 824 825 sb->have_layout = true; 826 827 ret = bch2_sb_validate(sb, 0, &err); 828 if (ret) { 829 bch2_print_opts(opts, KERN_ERR "bcachefs (%s): error validating superblock: %s\n", 830 path, err.buf); 831 goto err_no_print; 832 } 833 out: 834 printbuf_exit(&err); 835 return ret; 836 err: 837 bch2_print_opts(opts, KERN_ERR "bcachefs (%s): error reading superblock: %s\n", 838 path, err.buf); 839 err_no_print: 840 bch2_free_super(sb); 841 goto out; 842 } 843 844 int bch2_read_super(const char *path, struct bch_opts *opts, 845 struct bch_sb_handle *sb) 846 { 847 return __bch2_read_super(path, opts, sb, false); 848 } 849 850 /* provide a silenced version for mount.bcachefs */ 851 852 int bch2_read_super_silent(const char *path, struct bch_opts *opts, 853 struct bch_sb_handle *sb) 854 { 855 return __bch2_read_super(path, opts, sb, true); 856 } 857 858 /* write superblock: */ 859 860 static void write_super_endio(struct bio *bio) 861 { 862 struct bch_dev *ca = bio->bi_private; 863 864 /* XXX: return errors directly */ 865 866 if (bch2_dev_io_err_on(bio->bi_status, ca, 867 bio_data_dir(bio) 868 ? BCH_MEMBER_ERROR_write 869 : BCH_MEMBER_ERROR_read, 870 "superblock %s error: %s", 871 bio_data_dir(bio) ? "write" : "read", 872 bch2_blk_status_to_str(bio->bi_status))) 873 ca->sb_write_error = 1; 874 875 closure_put(&ca->fs->sb_write); 876 percpu_ref_put(&ca->io_ref); 877 } 878 879 static void read_back_super(struct bch_fs *c, struct bch_dev *ca) 880 { 881 struct bch_sb *sb = ca->disk_sb.sb; 882 struct bio *bio = ca->disk_sb.bio; 883 884 bio_reset(bio, ca->disk_sb.bdev, REQ_OP_READ|REQ_SYNC|REQ_META); 885 bio->bi_iter.bi_sector = le64_to_cpu(sb->layout.sb_offset[0]); 886 bio->bi_end_io = write_super_endio; 887 bio->bi_private = ca; 888 bch2_bio_map(bio, ca->sb_read_scratch, PAGE_SIZE); 889 890 this_cpu_add(ca->io_done->sectors[READ][BCH_DATA_sb], 891 bio_sectors(bio)); 892 893 percpu_ref_get(&ca->io_ref); 894 closure_bio_submit(bio, &c->sb_write); 895 } 896 897 static void write_one_super(struct bch_fs *c, struct bch_dev *ca, unsigned idx) 898 { 899 struct bch_sb *sb = ca->disk_sb.sb; 900 struct bio *bio = ca->disk_sb.bio; 901 902 sb->offset = sb->layout.sb_offset[idx]; 903 904 SET_BCH_SB_CSUM_TYPE(sb, bch2_csum_opt_to_type(c->opts.metadata_checksum, false)); 905 sb->csum = csum_vstruct(c, BCH_SB_CSUM_TYPE(sb), 906 null_nonce(), sb); 907 908 bio_reset(bio, ca->disk_sb.bdev, REQ_OP_WRITE|REQ_SYNC|REQ_META); 909 bio->bi_iter.bi_sector = le64_to_cpu(sb->offset); 910 bio->bi_end_io = write_super_endio; 911 bio->bi_private = ca; 912 bch2_bio_map(bio, sb, 913 roundup((size_t) vstruct_bytes(sb), 914 bdev_logical_block_size(ca->disk_sb.bdev))); 915 916 this_cpu_add(ca->io_done->sectors[WRITE][BCH_DATA_sb], 917 bio_sectors(bio)); 918 919 percpu_ref_get(&ca->io_ref); 920 closure_bio_submit(bio, &c->sb_write); 921 } 922 923 int bch2_write_super(struct bch_fs *c) 924 { 925 struct closure *cl = &c->sb_write; 926 struct printbuf err = PRINTBUF; 927 unsigned sb = 0, nr_wrote; 928 struct bch_devs_mask sb_written; 929 bool wrote, can_mount_without_written, can_mount_with_written; 930 unsigned degraded_flags = BCH_FORCE_IF_DEGRADED; 931 DARRAY(struct bch_dev *) online_devices = {}; 932 int ret = 0; 933 934 trace_and_count(c, write_super, c, _RET_IP_); 935 936 if (c->opts.very_degraded) 937 degraded_flags |= BCH_FORCE_IF_LOST; 938 939 lockdep_assert_held(&c->sb_lock); 940 941 closure_init_stack(cl); 942 memset(&sb_written, 0, sizeof(sb_written)); 943 944 for_each_online_member(c, ca) { 945 ret = darray_push(&online_devices, ca); 946 if (bch2_fs_fatal_err_on(ret, c, "%s: error allocating online devices", __func__)) { 947 percpu_ref_put(&ca->io_ref); 948 goto out; 949 } 950 percpu_ref_get(&ca->io_ref); 951 } 952 953 /* Make sure we're using the new magic numbers: */ 954 c->disk_sb.sb->magic = BCHFS_MAGIC; 955 c->disk_sb.sb->layout.magic = BCHFS_MAGIC; 956 957 le64_add_cpu(&c->disk_sb.sb->seq, 1); 958 959 struct bch_sb_field_members_v2 *mi = bch2_sb_field_get(c->disk_sb.sb, members_v2); 960 darray_for_each(online_devices, ca) 961 __bch2_members_v2_get_mut(mi, (*ca)->dev_idx)->seq = c->disk_sb.sb->seq; 962 c->disk_sb.sb->write_time = cpu_to_le64(ktime_get_real_seconds()); 963 964 if (test_bit(BCH_FS_error, &c->flags)) 965 SET_BCH_SB_HAS_ERRORS(c->disk_sb.sb, 1); 966 if (test_bit(BCH_FS_topology_error, &c->flags)) 967 SET_BCH_SB_HAS_TOPOLOGY_ERRORS(c->disk_sb.sb, 1); 968 969 SET_BCH_SB_BIG_ENDIAN(c->disk_sb.sb, CPU_BIG_ENDIAN); 970 971 bch2_sb_counters_from_cpu(c); 972 bch2_sb_members_from_cpu(c); 973 bch2_sb_members_cpy_v2_v1(&c->disk_sb); 974 bch2_sb_errors_from_cpu(c); 975 bch2_sb_downgrade_update(c); 976 977 darray_for_each(online_devices, ca) 978 bch2_sb_from_fs(c, (*ca)); 979 980 darray_for_each(online_devices, ca) { 981 printbuf_reset(&err); 982 983 ret = bch2_sb_validate(&(*ca)->disk_sb, BCH_VALIDATE_write, &err); 984 if (ret) { 985 bch2_fs_inconsistent(c, "sb invalid before write: %s", err.buf); 986 goto out; 987 } 988 } 989 990 if (c->opts.nochanges) 991 goto out; 992 993 /* 994 * Defer writing the superblock until filesystem initialization is 995 * complete - don't write out a partly initialized superblock: 996 */ 997 if (!BCH_SB_INITIALIZED(c->disk_sb.sb)) 998 goto out; 999 1000 if (le16_to_cpu(c->disk_sb.sb->version) > bcachefs_metadata_version_current) { 1001 struct printbuf buf = PRINTBUF; 1002 prt_printf(&buf, "attempting to write superblock that wasn't version downgraded ("); 1003 bch2_version_to_text(&buf, le16_to_cpu(c->disk_sb.sb->version)); 1004 prt_str(&buf, " > "); 1005 bch2_version_to_text(&buf, bcachefs_metadata_version_current); 1006 prt_str(&buf, ")"); 1007 bch2_fs_fatal_error(c, ": %s", buf.buf); 1008 printbuf_exit(&buf); 1009 return -BCH_ERR_sb_not_downgraded; 1010 } 1011 1012 darray_for_each(online_devices, ca) { 1013 __set_bit((*ca)->dev_idx, sb_written.d); 1014 (*ca)->sb_write_error = 0; 1015 } 1016 1017 darray_for_each(online_devices, ca) 1018 read_back_super(c, *ca); 1019 closure_sync(cl); 1020 1021 darray_for_each(online_devices, cap) { 1022 struct bch_dev *ca = *cap; 1023 1024 if (ca->sb_write_error) 1025 continue; 1026 1027 if (le64_to_cpu(ca->sb_read_scratch->seq) < ca->disk_sb.seq) { 1028 struct printbuf buf = PRINTBUF; 1029 prt_char(&buf, ' '); 1030 prt_bdevname(&buf, ca->disk_sb.bdev); 1031 prt_printf(&buf, 1032 ": Superblock write was silently dropped! (seq %llu expected %llu)", 1033 le64_to_cpu(ca->sb_read_scratch->seq), 1034 ca->disk_sb.seq); 1035 bch2_fs_fatal_error(c, "%s", buf.buf); 1036 printbuf_exit(&buf); 1037 ret = -BCH_ERR_erofs_sb_err; 1038 } 1039 1040 if (le64_to_cpu(ca->sb_read_scratch->seq) > ca->disk_sb.seq) { 1041 struct printbuf buf = PRINTBUF; 1042 prt_char(&buf, ' '); 1043 prt_bdevname(&buf, ca->disk_sb.bdev); 1044 prt_printf(&buf, 1045 ": Superblock modified by another process (seq %llu expected %llu)", 1046 le64_to_cpu(ca->sb_read_scratch->seq), 1047 ca->disk_sb.seq); 1048 bch2_fs_fatal_error(c, "%s", buf.buf); 1049 printbuf_exit(&buf); 1050 ret = -BCH_ERR_erofs_sb_err; 1051 } 1052 } 1053 1054 if (ret) 1055 goto out; 1056 1057 do { 1058 wrote = false; 1059 darray_for_each(online_devices, cap) { 1060 struct bch_dev *ca = *cap; 1061 if (!ca->sb_write_error && 1062 sb < ca->disk_sb.sb->layout.nr_superblocks) { 1063 write_one_super(c, ca, sb); 1064 wrote = true; 1065 } 1066 } 1067 closure_sync(cl); 1068 sb++; 1069 } while (wrote); 1070 1071 darray_for_each(online_devices, cap) { 1072 struct bch_dev *ca = *cap; 1073 if (ca->sb_write_error) 1074 __clear_bit(ca->dev_idx, sb_written.d); 1075 else 1076 ca->disk_sb.seq = le64_to_cpu(ca->disk_sb.sb->seq); 1077 } 1078 1079 nr_wrote = dev_mask_nr(&sb_written); 1080 1081 can_mount_with_written = 1082 bch2_have_enough_devs(c, sb_written, degraded_flags, false); 1083 1084 for (unsigned i = 0; i < ARRAY_SIZE(sb_written.d); i++) 1085 sb_written.d[i] = ~sb_written.d[i]; 1086 1087 can_mount_without_written = 1088 bch2_have_enough_devs(c, sb_written, degraded_flags, false); 1089 1090 /* 1091 * If we would be able to mount _without_ the devices we successfully 1092 * wrote superblocks to, we weren't able to write to enough devices: 1093 * 1094 * Exception: if we can mount without the successes because we haven't 1095 * written anything (new filesystem), we continue if we'd be able to 1096 * mount with the devices we did successfully write to: 1097 */ 1098 if (bch2_fs_fatal_err_on(!nr_wrote || 1099 !can_mount_with_written || 1100 (can_mount_without_written && 1101 !can_mount_with_written), c, 1102 ": Unable to write superblock to sufficient devices (from %ps)", 1103 (void *) _RET_IP_)) 1104 ret = -1; 1105 out: 1106 /* Make new options visible after they're persistent: */ 1107 bch2_sb_update(c); 1108 darray_for_each(online_devices, ca) 1109 percpu_ref_put(&(*ca)->io_ref); 1110 darray_exit(&online_devices); 1111 printbuf_exit(&err); 1112 return ret; 1113 } 1114 1115 void __bch2_check_set_feature(struct bch_fs *c, unsigned feat) 1116 { 1117 mutex_lock(&c->sb_lock); 1118 if (!(c->sb.features & (1ULL << feat))) { 1119 c->disk_sb.sb->features[0] |= cpu_to_le64(1ULL << feat); 1120 1121 bch2_write_super(c); 1122 } 1123 mutex_unlock(&c->sb_lock); 1124 } 1125 1126 /* Downgrade if superblock is at a higher version than currently supported: */ 1127 bool bch2_check_version_downgrade(struct bch_fs *c) 1128 { 1129 bool ret = bcachefs_metadata_version_current < c->sb.version; 1130 1131 lockdep_assert_held(&c->sb_lock); 1132 1133 /* 1134 * Downgrade, if superblock is at a higher version than currently 1135 * supported: 1136 * 1137 * c->sb will be checked before we write the superblock, so update it as 1138 * well: 1139 */ 1140 if (BCH_SB_VERSION_UPGRADE_COMPLETE(c->disk_sb.sb) > bcachefs_metadata_version_current) 1141 SET_BCH_SB_VERSION_UPGRADE_COMPLETE(c->disk_sb.sb, bcachefs_metadata_version_current); 1142 if (c->sb.version > bcachefs_metadata_version_current) 1143 c->disk_sb.sb->version = cpu_to_le16(bcachefs_metadata_version_current); 1144 if (c->sb.version_min > bcachefs_metadata_version_current) 1145 c->disk_sb.sb->version_min = cpu_to_le16(bcachefs_metadata_version_current); 1146 c->disk_sb.sb->compat[0] &= cpu_to_le64((1ULL << BCH_COMPAT_NR) - 1); 1147 return ret; 1148 } 1149 1150 void bch2_sb_upgrade(struct bch_fs *c, unsigned new_version) 1151 { 1152 lockdep_assert_held(&c->sb_lock); 1153 1154 if (BCH_VERSION_MAJOR(new_version) > 1155 BCH_VERSION_MAJOR(le16_to_cpu(c->disk_sb.sb->version))) 1156 bch2_sb_field_resize(&c->disk_sb, downgrade, 0); 1157 1158 c->disk_sb.sb->version = cpu_to_le16(new_version); 1159 c->disk_sb.sb->features[0] |= cpu_to_le64(BCH_SB_FEATURES_ALL); 1160 } 1161 1162 static int bch2_sb_ext_validate(struct bch_sb *sb, struct bch_sb_field *f, 1163 enum bch_validate_flags flags, struct printbuf *err) 1164 { 1165 if (vstruct_bytes(f) < 88) { 1166 prt_printf(err, "field too small (%zu < %u)", vstruct_bytes(f), 88); 1167 return -BCH_ERR_invalid_sb_ext; 1168 } 1169 1170 return 0; 1171 } 1172 1173 static void bch2_sb_ext_to_text(struct printbuf *out, struct bch_sb *sb, 1174 struct bch_sb_field *f) 1175 { 1176 struct bch_sb_field_ext *e = field_to_type(f, ext); 1177 1178 prt_printf(out, "Recovery passes required:\t"); 1179 prt_bitflags(out, bch2_recovery_passes, 1180 bch2_recovery_passes_from_stable(le64_to_cpu(e->recovery_passes_required[0]))); 1181 prt_newline(out); 1182 1183 unsigned long *errors_silent = kmalloc(sizeof(e->errors_silent), GFP_KERNEL); 1184 if (errors_silent) { 1185 le_bitvector_to_cpu(errors_silent, (void *) e->errors_silent, sizeof(e->errors_silent) * 8); 1186 1187 prt_printf(out, "Errors to silently fix:\t"); 1188 prt_bitflags_vector(out, bch2_sb_error_strs, errors_silent, sizeof(e->errors_silent) * 8); 1189 prt_newline(out); 1190 1191 kfree(errors_silent); 1192 } 1193 1194 prt_printf(out, "Btrees with missing data:\t"); 1195 prt_bitflags(out, __bch2_btree_ids, le64_to_cpu(e->btrees_lost_data)); 1196 prt_newline(out); 1197 } 1198 1199 static const struct bch_sb_field_ops bch_sb_field_ops_ext = { 1200 .validate = bch2_sb_ext_validate, 1201 .to_text = bch2_sb_ext_to_text, 1202 }; 1203 1204 static const struct bch_sb_field_ops *bch2_sb_field_ops[] = { 1205 #define x(f, nr) \ 1206 [BCH_SB_FIELD_##f] = &bch_sb_field_ops_##f, 1207 BCH_SB_FIELDS() 1208 #undef x 1209 }; 1210 1211 static const struct bch_sb_field_ops bch2_sb_field_null_ops; 1212 1213 static const struct bch_sb_field_ops *bch2_sb_field_type_ops(unsigned type) 1214 { 1215 return likely(type < ARRAY_SIZE(bch2_sb_field_ops)) 1216 ? bch2_sb_field_ops[type] 1217 : &bch2_sb_field_null_ops; 1218 } 1219 1220 static int bch2_sb_field_validate(struct bch_sb *sb, struct bch_sb_field *f, 1221 enum bch_validate_flags flags, struct printbuf *err) 1222 { 1223 unsigned type = le32_to_cpu(f->type); 1224 struct printbuf field_err = PRINTBUF; 1225 const struct bch_sb_field_ops *ops = bch2_sb_field_type_ops(type); 1226 int ret; 1227 1228 ret = ops->validate ? ops->validate(sb, f, flags, &field_err) : 0; 1229 if (ret) { 1230 prt_printf(err, "Invalid superblock section %s: %s", 1231 bch2_sb_fields[type], field_err.buf); 1232 prt_newline(err); 1233 bch2_sb_field_to_text(err, sb, f); 1234 } 1235 1236 printbuf_exit(&field_err); 1237 return ret; 1238 } 1239 1240 void __bch2_sb_field_to_text(struct printbuf *out, struct bch_sb *sb, 1241 struct bch_sb_field *f) 1242 { 1243 unsigned type = le32_to_cpu(f->type); 1244 const struct bch_sb_field_ops *ops = bch2_sb_field_type_ops(type); 1245 1246 if (!out->nr_tabstops) 1247 printbuf_tabstop_push(out, 32); 1248 1249 if (ops->to_text) 1250 ops->to_text(out, sb, f); 1251 } 1252 1253 void bch2_sb_field_to_text(struct printbuf *out, struct bch_sb *sb, 1254 struct bch_sb_field *f) 1255 { 1256 unsigned type = le32_to_cpu(f->type); 1257 1258 if (type < BCH_SB_FIELD_NR) 1259 prt_printf(out, "%s", bch2_sb_fields[type]); 1260 else 1261 prt_printf(out, "(unknown field %u)", type); 1262 1263 prt_printf(out, " (size %zu):", vstruct_bytes(f)); 1264 prt_newline(out); 1265 1266 __bch2_sb_field_to_text(out, sb, f); 1267 } 1268 1269 void bch2_sb_layout_to_text(struct printbuf *out, struct bch_sb_layout *l) 1270 { 1271 unsigned i; 1272 1273 prt_printf(out, "Type: %u", l->layout_type); 1274 prt_newline(out); 1275 1276 prt_str(out, "Superblock max size: "); 1277 prt_units_u64(out, 512 << l->sb_max_size_bits); 1278 prt_newline(out); 1279 1280 prt_printf(out, "Nr superblocks: %u", l->nr_superblocks); 1281 prt_newline(out); 1282 1283 prt_str(out, "Offsets: "); 1284 for (i = 0; i < l->nr_superblocks; i++) { 1285 if (i) 1286 prt_str(out, ", "); 1287 prt_printf(out, "%llu", le64_to_cpu(l->sb_offset[i])); 1288 } 1289 prt_newline(out); 1290 } 1291 1292 void bch2_sb_to_text(struct printbuf *out, struct bch_sb *sb, 1293 bool print_layout, unsigned fields) 1294 { 1295 u64 fields_have = 0; 1296 unsigned nr_devices = 0; 1297 1298 if (!out->nr_tabstops) 1299 printbuf_tabstop_push(out, 44); 1300 1301 for (int i = 0; i < sb->nr_devices; i++) 1302 nr_devices += bch2_member_exists(sb, i); 1303 1304 prt_printf(out, "External UUID:\t"); 1305 pr_uuid(out, sb->user_uuid.b); 1306 prt_newline(out); 1307 1308 prt_printf(out, "Internal UUID:\t"); 1309 pr_uuid(out, sb->uuid.b); 1310 prt_newline(out); 1311 1312 prt_printf(out, "Magic number:\t"); 1313 pr_uuid(out, sb->magic.b); 1314 prt_newline(out); 1315 1316 prt_printf(out, "Device index:\t%u\n", sb->dev_idx); 1317 1318 prt_printf(out, "Label:\t"); 1319 if (!strlen(sb->label)) 1320 prt_printf(out, "(none)"); 1321 else 1322 prt_printf(out, "%.*s", (int) sizeof(sb->label), sb->label); 1323 prt_newline(out); 1324 1325 prt_printf(out, "Version:\t"); 1326 bch2_version_to_text(out, le16_to_cpu(sb->version)); 1327 prt_newline(out); 1328 1329 prt_printf(out, "Version upgrade complete:\t"); 1330 bch2_version_to_text(out, BCH_SB_VERSION_UPGRADE_COMPLETE(sb)); 1331 prt_newline(out); 1332 1333 prt_printf(out, "Oldest version on disk:\t"); 1334 bch2_version_to_text(out, le16_to_cpu(sb->version_min)); 1335 prt_newline(out); 1336 1337 prt_printf(out, "Created:\t"); 1338 if (sb->time_base_lo) 1339 bch2_prt_datetime(out, div_u64(le64_to_cpu(sb->time_base_lo), NSEC_PER_SEC)); 1340 else 1341 prt_printf(out, "(not set)"); 1342 prt_newline(out); 1343 1344 prt_printf(out, "Sequence number:\t"); 1345 prt_printf(out, "%llu", le64_to_cpu(sb->seq)); 1346 prt_newline(out); 1347 1348 prt_printf(out, "Time of last write:\t"); 1349 bch2_prt_datetime(out, le64_to_cpu(sb->write_time)); 1350 prt_newline(out); 1351 1352 prt_printf(out, "Superblock size:\t"); 1353 prt_units_u64(out, vstruct_bytes(sb)); 1354 prt_str(out, "/"); 1355 prt_units_u64(out, 512ULL << sb->layout.sb_max_size_bits); 1356 prt_newline(out); 1357 1358 prt_printf(out, "Clean:\t%llu\n", BCH_SB_CLEAN(sb)); 1359 prt_printf(out, "Devices:\t%u\n", nr_devices); 1360 1361 prt_printf(out, "Sections:\t"); 1362 vstruct_for_each(sb, f) 1363 fields_have |= 1 << le32_to_cpu(f->type); 1364 prt_bitflags(out, bch2_sb_fields, fields_have); 1365 prt_newline(out); 1366 1367 prt_printf(out, "Features:\t"); 1368 prt_bitflags(out, bch2_sb_features, le64_to_cpu(sb->features[0])); 1369 prt_newline(out); 1370 1371 prt_printf(out, "Compat features:\t"); 1372 prt_bitflags(out, bch2_sb_compat, le64_to_cpu(sb->compat[0])); 1373 prt_newline(out); 1374 1375 prt_newline(out); 1376 prt_printf(out, "Options:"); 1377 prt_newline(out); 1378 printbuf_indent_add(out, 2); 1379 { 1380 enum bch_opt_id id; 1381 1382 for (id = 0; id < bch2_opts_nr; id++) { 1383 const struct bch_option *opt = bch2_opt_table + id; 1384 1385 if (opt->get_sb != BCH2_NO_SB_OPT) { 1386 u64 v = bch2_opt_from_sb(sb, id); 1387 1388 prt_printf(out, "%s:\t", opt->attr.name); 1389 bch2_opt_to_text(out, NULL, sb, opt, v, 1390 OPT_HUMAN_READABLE|OPT_SHOW_FULL_LIST); 1391 prt_newline(out); 1392 } 1393 } 1394 } 1395 1396 printbuf_indent_sub(out, 2); 1397 1398 if (print_layout) { 1399 prt_newline(out); 1400 prt_printf(out, "layout:"); 1401 prt_newline(out); 1402 printbuf_indent_add(out, 2); 1403 bch2_sb_layout_to_text(out, &sb->layout); 1404 printbuf_indent_sub(out, 2); 1405 } 1406 1407 vstruct_for_each(sb, f) 1408 if (fields & (1 << le32_to_cpu(f->type))) { 1409 prt_newline(out); 1410 bch2_sb_field_to_text(out, sb, f); 1411 } 1412 } 1413