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 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->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, struct printbuf *out, 348 int rw) 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 (rw == READ) { 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 } 418 419 for (opt_id = 0; opt_id < bch2_opts_nr; opt_id++) { 420 const struct bch_option *opt = bch2_opt_table + opt_id; 421 422 if (opt->get_sb != BCH2_NO_SB_OPT) { 423 u64 v = bch2_opt_from_sb(sb, opt_id); 424 425 prt_printf(out, "Invalid option "); 426 ret = bch2_opt_validate(opt, v, out); 427 if (ret) 428 return ret; 429 430 printbuf_reset(out); 431 } 432 } 433 434 /* validate layout */ 435 ret = validate_sb_layout(&sb->layout, out); 436 if (ret) 437 return ret; 438 439 vstruct_for_each(sb, f) { 440 if (!f->u64s) { 441 prt_printf(out, "Invalid superblock: optional field with size 0 (type %u)", 442 le32_to_cpu(f->type)); 443 return -BCH_ERR_invalid_sb_field_size; 444 } 445 446 if (vstruct_next(f) > vstruct_last(sb)) { 447 prt_printf(out, "Invalid superblock: optional field extends past end of superblock (type %u)", 448 le32_to_cpu(f->type)); 449 return -BCH_ERR_invalid_sb_field_size; 450 } 451 } 452 453 /* members must be validated first: */ 454 mi = bch2_sb_field_get(sb, members_v1); 455 if (!mi) { 456 prt_printf(out, "Invalid superblock: member info area missing"); 457 return -BCH_ERR_invalid_sb_members_missing; 458 } 459 460 ret = bch2_sb_field_validate(sb, &mi->field, out); 461 if (ret) 462 return ret; 463 464 vstruct_for_each(sb, f) { 465 if (le32_to_cpu(f->type) == BCH_SB_FIELD_members_v1) 466 continue; 467 468 ret = bch2_sb_field_validate(sb, f, out); 469 if (ret) 470 return ret; 471 } 472 473 if (rw == WRITE && 474 bch2_sb_member_get(sb, sb->dev_idx).seq != sb->seq) { 475 prt_printf(out, "Invalid superblock: member seq %llu != sb seq %llu", 476 le64_to_cpu(bch2_sb_member_get(sb, sb->dev_idx).seq), 477 le64_to_cpu(sb->seq)); 478 return -BCH_ERR_invalid_sb_members_missing; 479 } 480 481 return 0; 482 } 483 484 /* device open: */ 485 486 static unsigned long le_ulong_to_cpu(unsigned long v) 487 { 488 return sizeof(unsigned long) == 8 489 ? le64_to_cpu(v) 490 : le32_to_cpu(v); 491 } 492 493 static void le_bitvector_to_cpu(unsigned long *dst, unsigned long *src, unsigned nr) 494 { 495 BUG_ON(nr & (BITS_PER_TYPE(long) - 1)); 496 497 for (unsigned i = 0; i < BITS_TO_LONGS(nr); i++) 498 dst[i] = le_ulong_to_cpu(src[i]); 499 } 500 501 static void bch2_sb_update(struct bch_fs *c) 502 { 503 struct bch_sb *src = c->disk_sb.sb; 504 505 lockdep_assert_held(&c->sb_lock); 506 507 c->sb.uuid = src->uuid; 508 c->sb.user_uuid = src->user_uuid; 509 c->sb.version = le16_to_cpu(src->version); 510 c->sb.version_min = le16_to_cpu(src->version_min); 511 c->sb.version_upgrade_complete = BCH_SB_VERSION_UPGRADE_COMPLETE(src); 512 c->sb.nr_devices = src->nr_devices; 513 c->sb.clean = BCH_SB_CLEAN(src); 514 c->sb.encryption_type = BCH_SB_ENCRYPTION_TYPE(src); 515 516 c->sb.nsec_per_time_unit = le32_to_cpu(src->time_precision); 517 c->sb.time_units_per_sec = NSEC_PER_SEC / c->sb.nsec_per_time_unit; 518 519 /* XXX this is wrong, we need a 96 or 128 bit integer type */ 520 c->sb.time_base_lo = div_u64(le64_to_cpu(src->time_base_lo), 521 c->sb.nsec_per_time_unit); 522 c->sb.time_base_hi = le32_to_cpu(src->time_base_hi); 523 524 c->sb.features = le64_to_cpu(src->features[0]); 525 c->sb.compat = le64_to_cpu(src->compat[0]); 526 527 memset(c->sb.errors_silent, 0, sizeof(c->sb.errors_silent)); 528 529 struct bch_sb_field_ext *ext = bch2_sb_field_get(src, ext); 530 if (ext) { 531 le_bitvector_to_cpu(c->sb.errors_silent, (void *) ext->errors_silent, 532 sizeof(c->sb.errors_silent) * 8); 533 c->sb.btrees_lost_data = le64_to_cpu(ext->btrees_lost_data); 534 } 535 536 for_each_member_device(c, ca) { 537 struct bch_member m = bch2_sb_member_get(src, ca->dev_idx); 538 ca->mi = bch2_mi_to_cpu(&m); 539 } 540 } 541 542 static int __copy_super(struct bch_sb_handle *dst_handle, struct bch_sb *src) 543 { 544 struct bch_sb_field *src_f, *dst_f; 545 struct bch_sb *dst = dst_handle->sb; 546 unsigned i; 547 548 dst->version = src->version; 549 dst->version_min = src->version_min; 550 dst->seq = src->seq; 551 dst->uuid = src->uuid; 552 dst->user_uuid = src->user_uuid; 553 memcpy(dst->label, src->label, sizeof(dst->label)); 554 555 dst->block_size = src->block_size; 556 dst->nr_devices = src->nr_devices; 557 558 dst->time_base_lo = src->time_base_lo; 559 dst->time_base_hi = src->time_base_hi; 560 dst->time_precision = src->time_precision; 561 dst->write_time = src->write_time; 562 563 memcpy(dst->flags, src->flags, sizeof(dst->flags)); 564 memcpy(dst->features, src->features, sizeof(dst->features)); 565 memcpy(dst->compat, src->compat, sizeof(dst->compat)); 566 567 for (i = 0; i < BCH_SB_FIELD_NR; i++) { 568 int d; 569 570 if ((1U << i) & BCH_SINGLE_DEVICE_SB_FIELDS) 571 continue; 572 573 src_f = bch2_sb_field_get_id(src, i); 574 dst_f = bch2_sb_field_get_id(dst, i); 575 576 d = (src_f ? le32_to_cpu(src_f->u64s) : 0) - 577 (dst_f ? le32_to_cpu(dst_f->u64s) : 0); 578 if (d > 0) { 579 int ret = bch2_sb_realloc(dst_handle, 580 le32_to_cpu(dst_handle->sb->u64s) + d); 581 582 if (ret) 583 return ret; 584 585 dst = dst_handle->sb; 586 dst_f = bch2_sb_field_get_id(dst, i); 587 } 588 589 dst_f = __bch2_sb_field_resize(dst_handle, dst_f, 590 src_f ? le32_to_cpu(src_f->u64s) : 0); 591 592 if (src_f) 593 memcpy(dst_f, src_f, vstruct_bytes(src_f)); 594 } 595 596 return 0; 597 } 598 599 int bch2_sb_to_fs(struct bch_fs *c, struct bch_sb *src) 600 { 601 int ret; 602 603 lockdep_assert_held(&c->sb_lock); 604 605 ret = bch2_sb_realloc(&c->disk_sb, 0) ?: 606 __copy_super(&c->disk_sb, src) ?: 607 bch2_sb_replicas_to_cpu_replicas(c) ?: 608 bch2_sb_disk_groups_to_cpu(c); 609 if (ret) 610 return ret; 611 612 bch2_sb_update(c); 613 return 0; 614 } 615 616 int bch2_sb_from_fs(struct bch_fs *c, struct bch_dev *ca) 617 { 618 return __copy_super(&ca->disk_sb, c->disk_sb.sb); 619 } 620 621 /* read superblock: */ 622 623 static int read_one_super(struct bch_sb_handle *sb, u64 offset, struct printbuf *err) 624 { 625 size_t bytes; 626 int ret; 627 reread: 628 bio_reset(sb->bio, sb->bdev, REQ_OP_READ|REQ_SYNC|REQ_META); 629 sb->bio->bi_iter.bi_sector = offset; 630 bch2_bio_map(sb->bio, sb->sb, sb->buffer_size); 631 632 ret = submit_bio_wait(sb->bio); 633 if (ret) { 634 prt_printf(err, "IO error: %i", ret); 635 return ret; 636 } 637 638 if (!uuid_equal(&sb->sb->magic, &BCACHE_MAGIC) && 639 !uuid_equal(&sb->sb->magic, &BCHFS_MAGIC)) { 640 prt_str(err, "Not a bcachefs superblock (got magic "); 641 pr_uuid(err, sb->sb->magic.b); 642 prt_str(err, ")"); 643 return -BCH_ERR_invalid_sb_magic; 644 } 645 646 ret = bch2_sb_compatible(sb->sb, err); 647 if (ret) 648 return ret; 649 650 bytes = vstruct_bytes(sb->sb); 651 652 if (bytes > 512 << sb->sb->layout.sb_max_size_bits) { 653 prt_printf(err, "Invalid superblock: too big (got %zu bytes, layout max %lu)", 654 bytes, 512UL << sb->sb->layout.sb_max_size_bits); 655 return -BCH_ERR_invalid_sb_too_big; 656 } 657 658 if (bytes > sb->buffer_size) { 659 ret = bch2_sb_realloc(sb, le32_to_cpu(sb->sb->u64s)); 660 if (ret) 661 return ret; 662 goto reread; 663 } 664 665 enum bch_csum_type csum_type = BCH_SB_CSUM_TYPE(sb->sb); 666 if (csum_type >= BCH_CSUM_NR) { 667 prt_printf(err, "unknown checksum type %llu", BCH_SB_CSUM_TYPE(sb->sb)); 668 return -BCH_ERR_invalid_sb_csum_type; 669 } 670 671 /* XXX: verify MACs */ 672 struct bch_csum csum = csum_vstruct(NULL, csum_type, null_nonce(), sb->sb); 673 if (bch2_crc_cmp(csum, sb->sb->csum)) { 674 bch2_csum_err_msg(err, csum_type, sb->sb->csum, csum); 675 return -BCH_ERR_invalid_sb_csum; 676 } 677 678 sb->seq = le64_to_cpu(sb->sb->seq); 679 680 return 0; 681 } 682 683 static int __bch2_read_super(const char *path, struct bch_opts *opts, 684 struct bch_sb_handle *sb, bool ignore_notbchfs_msg) 685 { 686 u64 offset = opt_get(*opts, sb); 687 struct bch_sb_layout layout; 688 struct printbuf err = PRINTBUF; 689 struct printbuf err2 = PRINTBUF; 690 __le64 *i; 691 int ret; 692 #ifndef __KERNEL__ 693 retry: 694 #endif 695 memset(sb, 0, sizeof(*sb)); 696 sb->mode = BLK_OPEN_READ; 697 sb->have_bio = true; 698 sb->holder = kmalloc(1, GFP_KERNEL); 699 if (!sb->holder) 700 return -ENOMEM; 701 702 sb->sb_name = kstrdup(path, GFP_KERNEL); 703 if (!sb->sb_name) { 704 ret = -ENOMEM; 705 prt_printf(&err, "error allocating memory for sb_name"); 706 goto err; 707 } 708 709 #ifndef __KERNEL__ 710 if (opt_get(*opts, direct_io) == false) 711 sb->mode |= BLK_OPEN_BUFFERED; 712 #endif 713 714 if (!opt_get(*opts, noexcl)) 715 sb->mode |= BLK_OPEN_EXCL; 716 717 if (!opt_get(*opts, nochanges)) 718 sb->mode |= BLK_OPEN_WRITE; 719 720 sb->s_bdev_file = bdev_file_open_by_path(path, sb->mode, sb->holder, &bch2_sb_handle_bdev_ops); 721 if (IS_ERR(sb->s_bdev_file) && 722 PTR_ERR(sb->s_bdev_file) == -EACCES && 723 opt_get(*opts, read_only)) { 724 sb->mode &= ~BLK_OPEN_WRITE; 725 726 sb->s_bdev_file = bdev_file_open_by_path(path, sb->mode, sb->holder, &bch2_sb_handle_bdev_ops); 727 if (!IS_ERR(sb->s_bdev_file)) 728 opt_set(*opts, nochanges, true); 729 } 730 731 if (IS_ERR(sb->s_bdev_file)) { 732 ret = PTR_ERR(sb->s_bdev_file); 733 prt_printf(&err, "error opening %s: %s", path, bch2_err_str(ret)); 734 goto err; 735 } 736 sb->bdev = file_bdev(sb->s_bdev_file); 737 738 ret = bch2_sb_realloc(sb, 0); 739 if (ret) { 740 prt_printf(&err, "error allocating memory for superblock"); 741 goto err; 742 } 743 744 if (bch2_fs_init_fault("read_super")) { 745 prt_printf(&err, "dynamic fault"); 746 ret = -EFAULT; 747 goto err; 748 } 749 750 ret = read_one_super(sb, offset, &err); 751 if (!ret) 752 goto got_super; 753 754 if (opt_defined(*opts, sb)) 755 goto err; 756 757 prt_printf(&err2, "bcachefs (%s): error reading default superblock: %s\n", 758 path, err.buf); 759 if (ret == -BCH_ERR_invalid_sb_magic && ignore_notbchfs_msg) 760 bch2_print_opts(opts, KERN_INFO "%s", err2.buf); 761 else 762 bch2_print_opts(opts, KERN_ERR "%s", err2.buf); 763 764 printbuf_exit(&err2); 765 printbuf_reset(&err); 766 767 /* 768 * Error reading primary superblock - read location of backup 769 * superblocks: 770 */ 771 bio_reset(sb->bio, sb->bdev, REQ_OP_READ|REQ_SYNC|REQ_META); 772 sb->bio->bi_iter.bi_sector = BCH_SB_LAYOUT_SECTOR; 773 /* 774 * use sb buffer to read layout, since sb buffer is page aligned but 775 * layout won't be: 776 */ 777 bch2_bio_map(sb->bio, sb->sb, sizeof(struct bch_sb_layout)); 778 779 ret = submit_bio_wait(sb->bio); 780 if (ret) { 781 prt_printf(&err, "IO error: %i", ret); 782 goto err; 783 } 784 785 memcpy(&layout, sb->sb, sizeof(layout)); 786 ret = validate_sb_layout(&layout, &err); 787 if (ret) 788 goto err; 789 790 for (i = layout.sb_offset; 791 i < layout.sb_offset + layout.nr_superblocks; i++) { 792 offset = le64_to_cpu(*i); 793 794 if (offset == opt_get(*opts, sb)) 795 continue; 796 797 ret = read_one_super(sb, offset, &err); 798 if (!ret) 799 goto got_super; 800 } 801 802 goto err; 803 804 got_super: 805 if (le16_to_cpu(sb->sb->block_size) << 9 < 806 bdev_logical_block_size(sb->bdev) && 807 opt_get(*opts, direct_io)) { 808 #ifndef __KERNEL__ 809 opt_set(*opts, direct_io, false); 810 bch2_free_super(sb); 811 goto retry; 812 #endif 813 prt_printf(&err, "block size (%u) smaller than device block size (%u)", 814 le16_to_cpu(sb->sb->block_size) << 9, 815 bdev_logical_block_size(sb->bdev)); 816 ret = -BCH_ERR_block_size_too_small; 817 goto err; 818 } 819 820 sb->have_layout = true; 821 822 ret = bch2_sb_validate(sb, &err, READ); 823 if (ret) { 824 bch2_print_opts(opts, KERN_ERR "bcachefs (%s): error validating superblock: %s\n", 825 path, err.buf); 826 goto err_no_print; 827 } 828 out: 829 printbuf_exit(&err); 830 return ret; 831 err: 832 bch2_print_opts(opts, KERN_ERR "bcachefs (%s): error reading superblock: %s\n", 833 path, err.buf); 834 err_no_print: 835 bch2_free_super(sb); 836 goto out; 837 } 838 839 int bch2_read_super(const char *path, struct bch_opts *opts, 840 struct bch_sb_handle *sb) 841 { 842 return __bch2_read_super(path, opts, sb, false); 843 } 844 845 /* provide a silenced version for mount.bcachefs */ 846 847 int bch2_read_super_silent(const char *path, struct bch_opts *opts, 848 struct bch_sb_handle *sb) 849 { 850 return __bch2_read_super(path, opts, sb, true); 851 } 852 853 /* write superblock: */ 854 855 static void write_super_endio(struct bio *bio) 856 { 857 struct bch_dev *ca = bio->bi_private; 858 859 /* XXX: return errors directly */ 860 861 if (bch2_dev_io_err_on(bio->bi_status, ca, 862 bio_data_dir(bio) 863 ? BCH_MEMBER_ERROR_write 864 : BCH_MEMBER_ERROR_read, 865 "superblock %s error: %s", 866 bio_data_dir(bio) ? "write" : "read", 867 bch2_blk_status_to_str(bio->bi_status))) 868 ca->sb_write_error = 1; 869 870 closure_put(&ca->fs->sb_write); 871 percpu_ref_put(&ca->io_ref); 872 } 873 874 static void read_back_super(struct bch_fs *c, struct bch_dev *ca) 875 { 876 struct bch_sb *sb = ca->disk_sb.sb; 877 struct bio *bio = ca->disk_sb.bio; 878 879 bio_reset(bio, ca->disk_sb.bdev, REQ_OP_READ|REQ_SYNC|REQ_META); 880 bio->bi_iter.bi_sector = le64_to_cpu(sb->layout.sb_offset[0]); 881 bio->bi_end_io = write_super_endio; 882 bio->bi_private = ca; 883 bch2_bio_map(bio, ca->sb_read_scratch, PAGE_SIZE); 884 885 this_cpu_add(ca->io_done->sectors[READ][BCH_DATA_sb], 886 bio_sectors(bio)); 887 888 percpu_ref_get(&ca->io_ref); 889 closure_bio_submit(bio, &c->sb_write); 890 } 891 892 static void write_one_super(struct bch_fs *c, struct bch_dev *ca, unsigned idx) 893 { 894 struct bch_sb *sb = ca->disk_sb.sb; 895 struct bio *bio = ca->disk_sb.bio; 896 897 sb->offset = sb->layout.sb_offset[idx]; 898 899 SET_BCH_SB_CSUM_TYPE(sb, bch2_csum_opt_to_type(c->opts.metadata_checksum, false)); 900 sb->csum = csum_vstruct(c, BCH_SB_CSUM_TYPE(sb), 901 null_nonce(), sb); 902 903 bio_reset(bio, ca->disk_sb.bdev, REQ_OP_WRITE|REQ_SYNC|REQ_META); 904 bio->bi_iter.bi_sector = le64_to_cpu(sb->offset); 905 bio->bi_end_io = write_super_endio; 906 bio->bi_private = ca; 907 bch2_bio_map(bio, sb, 908 roundup((size_t) vstruct_bytes(sb), 909 bdev_logical_block_size(ca->disk_sb.bdev))); 910 911 this_cpu_add(ca->io_done->sectors[WRITE][BCH_DATA_sb], 912 bio_sectors(bio)); 913 914 percpu_ref_get(&ca->io_ref); 915 closure_bio_submit(bio, &c->sb_write); 916 } 917 918 int bch2_write_super(struct bch_fs *c) 919 { 920 struct closure *cl = &c->sb_write; 921 struct printbuf err = PRINTBUF; 922 unsigned sb = 0, nr_wrote; 923 struct bch_devs_mask sb_written; 924 bool wrote, can_mount_without_written, can_mount_with_written; 925 unsigned degraded_flags = BCH_FORCE_IF_DEGRADED; 926 int ret = 0; 927 928 trace_and_count(c, write_super, c, _RET_IP_); 929 930 if (c->opts.very_degraded) 931 degraded_flags |= BCH_FORCE_IF_LOST; 932 933 lockdep_assert_held(&c->sb_lock); 934 935 closure_init_stack(cl); 936 memset(&sb_written, 0, sizeof(sb_written)); 937 938 /* Make sure we're using the new magic numbers: */ 939 c->disk_sb.sb->magic = BCHFS_MAGIC; 940 c->disk_sb.sb->layout.magic = BCHFS_MAGIC; 941 942 le64_add_cpu(&c->disk_sb.sb->seq, 1); 943 944 struct bch_sb_field_members_v2 *mi = bch2_sb_field_get(c->disk_sb.sb, members_v2); 945 for_each_online_member(c, ca) 946 __bch2_members_v2_get_mut(mi, ca->dev_idx)->seq = c->disk_sb.sb->seq; 947 c->disk_sb.sb->write_time = cpu_to_le64(ktime_get_real_seconds()); 948 949 if (test_bit(BCH_FS_error, &c->flags)) 950 SET_BCH_SB_HAS_ERRORS(c->disk_sb.sb, 1); 951 if (test_bit(BCH_FS_topology_error, &c->flags)) 952 SET_BCH_SB_HAS_TOPOLOGY_ERRORS(c->disk_sb.sb, 1); 953 954 SET_BCH_SB_BIG_ENDIAN(c->disk_sb.sb, CPU_BIG_ENDIAN); 955 956 bch2_sb_counters_from_cpu(c); 957 bch2_sb_members_from_cpu(c); 958 bch2_sb_members_cpy_v2_v1(&c->disk_sb); 959 bch2_sb_errors_from_cpu(c); 960 bch2_sb_downgrade_update(c); 961 962 for_each_online_member(c, ca) 963 bch2_sb_from_fs(c, ca); 964 965 for_each_online_member(c, ca) { 966 printbuf_reset(&err); 967 968 ret = bch2_sb_validate(&ca->disk_sb, &err, WRITE); 969 if (ret) { 970 bch2_fs_inconsistent(c, "sb invalid before write: %s", err.buf); 971 percpu_ref_put(&ca->io_ref); 972 goto out; 973 } 974 } 975 976 if (c->opts.nochanges) 977 goto out; 978 979 /* 980 * Defer writing the superblock until filesystem initialization is 981 * complete - don't write out a partly initialized superblock: 982 */ 983 if (!BCH_SB_INITIALIZED(c->disk_sb.sb)) 984 goto out; 985 986 if (le16_to_cpu(c->disk_sb.sb->version) > bcachefs_metadata_version_current) { 987 struct printbuf buf = PRINTBUF; 988 prt_printf(&buf, "attempting to write superblock that wasn't version downgraded ("); 989 bch2_version_to_text(&buf, le16_to_cpu(c->disk_sb.sb->version)); 990 prt_str(&buf, " > "); 991 bch2_version_to_text(&buf, bcachefs_metadata_version_current); 992 prt_str(&buf, ")"); 993 bch2_fs_fatal_error(c, ": %s", buf.buf); 994 printbuf_exit(&buf); 995 return -BCH_ERR_sb_not_downgraded; 996 } 997 998 for_each_online_member(c, ca) { 999 __set_bit(ca->dev_idx, sb_written.d); 1000 ca->sb_write_error = 0; 1001 } 1002 1003 for_each_online_member(c, ca) 1004 read_back_super(c, ca); 1005 closure_sync(cl); 1006 1007 for_each_online_member(c, ca) { 1008 if (ca->sb_write_error) 1009 continue; 1010 1011 if (le64_to_cpu(ca->sb_read_scratch->seq) < ca->disk_sb.seq) { 1012 bch2_fs_fatal_error(c, 1013 ": Superblock write was silently dropped! (seq %llu expected %llu)", 1014 le64_to_cpu(ca->sb_read_scratch->seq), 1015 ca->disk_sb.seq); 1016 percpu_ref_put(&ca->io_ref); 1017 ret = -BCH_ERR_erofs_sb_err; 1018 goto out; 1019 } 1020 1021 if (le64_to_cpu(ca->sb_read_scratch->seq) > ca->disk_sb.seq) { 1022 bch2_fs_fatal_error(c, 1023 ": Superblock modified by another process (seq %llu expected %llu)", 1024 le64_to_cpu(ca->sb_read_scratch->seq), 1025 ca->disk_sb.seq); 1026 percpu_ref_put(&ca->io_ref); 1027 ret = -BCH_ERR_erofs_sb_err; 1028 goto out; 1029 } 1030 } 1031 1032 do { 1033 wrote = false; 1034 for_each_online_member(c, ca) 1035 if (!ca->sb_write_error && 1036 sb < ca->disk_sb.sb->layout.nr_superblocks) { 1037 write_one_super(c, ca, sb); 1038 wrote = true; 1039 } 1040 closure_sync(cl); 1041 sb++; 1042 } while (wrote); 1043 1044 for_each_online_member(c, ca) { 1045 if (ca->sb_write_error) 1046 __clear_bit(ca->dev_idx, sb_written.d); 1047 else 1048 ca->disk_sb.seq = le64_to_cpu(ca->disk_sb.sb->seq); 1049 } 1050 1051 nr_wrote = dev_mask_nr(&sb_written); 1052 1053 can_mount_with_written = 1054 bch2_have_enough_devs(c, sb_written, degraded_flags, false); 1055 1056 for (unsigned i = 0; i < ARRAY_SIZE(sb_written.d); i++) 1057 sb_written.d[i] = ~sb_written.d[i]; 1058 1059 can_mount_without_written = 1060 bch2_have_enough_devs(c, sb_written, degraded_flags, false); 1061 1062 /* 1063 * If we would be able to mount _without_ the devices we successfully 1064 * wrote superblocks to, we weren't able to write to enough devices: 1065 * 1066 * Exception: if we can mount without the successes because we haven't 1067 * written anything (new filesystem), we continue if we'd be able to 1068 * mount with the devices we did successfully write to: 1069 */ 1070 if (bch2_fs_fatal_err_on(!nr_wrote || 1071 !can_mount_with_written || 1072 (can_mount_without_written && 1073 !can_mount_with_written), c, 1074 ": Unable to write superblock to sufficient devices (from %ps)", 1075 (void *) _RET_IP_)) 1076 ret = -1; 1077 out: 1078 /* Make new options visible after they're persistent: */ 1079 bch2_sb_update(c); 1080 printbuf_exit(&err); 1081 return ret; 1082 } 1083 1084 void __bch2_check_set_feature(struct bch_fs *c, unsigned feat) 1085 { 1086 mutex_lock(&c->sb_lock); 1087 if (!(c->sb.features & (1ULL << feat))) { 1088 c->disk_sb.sb->features[0] |= cpu_to_le64(1ULL << feat); 1089 1090 bch2_write_super(c); 1091 } 1092 mutex_unlock(&c->sb_lock); 1093 } 1094 1095 /* Downgrade if superblock is at a higher version than currently supported: */ 1096 bool bch2_check_version_downgrade(struct bch_fs *c) 1097 { 1098 bool ret = bcachefs_metadata_version_current < c->sb.version; 1099 1100 lockdep_assert_held(&c->sb_lock); 1101 1102 /* 1103 * Downgrade, if superblock is at a higher version than currently 1104 * supported: 1105 * 1106 * c->sb will be checked before we write the superblock, so update it as 1107 * well: 1108 */ 1109 if (BCH_SB_VERSION_UPGRADE_COMPLETE(c->disk_sb.sb) > bcachefs_metadata_version_current) { 1110 SET_BCH_SB_VERSION_UPGRADE_COMPLETE(c->disk_sb.sb, bcachefs_metadata_version_current); 1111 c->sb.version_upgrade_complete = bcachefs_metadata_version_current; 1112 } 1113 if (c->sb.version > bcachefs_metadata_version_current) { 1114 c->disk_sb.sb->version = cpu_to_le16(bcachefs_metadata_version_current); 1115 c->sb.version = bcachefs_metadata_version_current; 1116 } 1117 if (c->sb.version_min > bcachefs_metadata_version_current) { 1118 c->disk_sb.sb->version_min = cpu_to_le16(bcachefs_metadata_version_current); 1119 c->sb.version_min = bcachefs_metadata_version_current; 1120 } 1121 c->disk_sb.sb->compat[0] &= cpu_to_le64((1ULL << BCH_COMPAT_NR) - 1); 1122 return ret; 1123 } 1124 1125 void bch2_sb_upgrade(struct bch_fs *c, unsigned new_version) 1126 { 1127 lockdep_assert_held(&c->sb_lock); 1128 1129 if (BCH_VERSION_MAJOR(new_version) > 1130 BCH_VERSION_MAJOR(le16_to_cpu(c->disk_sb.sb->version))) 1131 bch2_sb_field_resize(&c->disk_sb, downgrade, 0); 1132 1133 c->disk_sb.sb->version = cpu_to_le16(new_version); 1134 c->disk_sb.sb->features[0] |= cpu_to_le64(BCH_SB_FEATURES_ALL); 1135 } 1136 1137 static int bch2_sb_ext_validate(struct bch_sb *sb, struct bch_sb_field *f, 1138 struct printbuf *err) 1139 { 1140 if (vstruct_bytes(f) < 88) { 1141 prt_printf(err, "field too small (%zu < %u)", vstruct_bytes(f), 88); 1142 return -BCH_ERR_invalid_sb_ext; 1143 } 1144 1145 return 0; 1146 } 1147 1148 static void bch2_sb_ext_to_text(struct printbuf *out, struct bch_sb *sb, 1149 struct bch_sb_field *f) 1150 { 1151 struct bch_sb_field_ext *e = field_to_type(f, ext); 1152 1153 prt_printf(out, "Recovery passes required:"); 1154 prt_tab(out); 1155 prt_bitflags(out, bch2_recovery_passes, 1156 bch2_recovery_passes_from_stable(le64_to_cpu(e->recovery_passes_required[0]))); 1157 prt_newline(out); 1158 1159 unsigned long *errors_silent = kmalloc(sizeof(e->errors_silent), GFP_KERNEL); 1160 if (errors_silent) { 1161 le_bitvector_to_cpu(errors_silent, (void *) e->errors_silent, sizeof(e->errors_silent) * 8); 1162 1163 prt_printf(out, "Errors to silently fix:"); 1164 prt_tab(out); 1165 prt_bitflags_vector(out, bch2_sb_error_strs, errors_silent, sizeof(e->errors_silent) * 8); 1166 prt_newline(out); 1167 1168 kfree(errors_silent); 1169 } 1170 1171 prt_printf(out, "Btrees with missing data:"); 1172 prt_tab(out); 1173 prt_bitflags(out, __bch2_btree_ids, le64_to_cpu(e->btrees_lost_data)); 1174 prt_newline(out); 1175 } 1176 1177 static const struct bch_sb_field_ops bch_sb_field_ops_ext = { 1178 .validate = bch2_sb_ext_validate, 1179 .to_text = bch2_sb_ext_to_text, 1180 }; 1181 1182 static const struct bch_sb_field_ops *bch2_sb_field_ops[] = { 1183 #define x(f, nr) \ 1184 [BCH_SB_FIELD_##f] = &bch_sb_field_ops_##f, 1185 BCH_SB_FIELDS() 1186 #undef x 1187 }; 1188 1189 static const struct bch_sb_field_ops bch2_sb_field_null_ops; 1190 1191 static const struct bch_sb_field_ops *bch2_sb_field_type_ops(unsigned type) 1192 { 1193 return likely(type < ARRAY_SIZE(bch2_sb_field_ops)) 1194 ? bch2_sb_field_ops[type] 1195 : &bch2_sb_field_null_ops; 1196 } 1197 1198 static int bch2_sb_field_validate(struct bch_sb *sb, struct bch_sb_field *f, 1199 struct printbuf *err) 1200 { 1201 unsigned type = le32_to_cpu(f->type); 1202 struct printbuf field_err = PRINTBUF; 1203 const struct bch_sb_field_ops *ops = bch2_sb_field_type_ops(type); 1204 int ret; 1205 1206 ret = ops->validate ? ops->validate(sb, f, &field_err) : 0; 1207 if (ret) { 1208 prt_printf(err, "Invalid superblock section %s: %s", 1209 bch2_sb_fields[type], field_err.buf); 1210 prt_newline(err); 1211 bch2_sb_field_to_text(err, sb, f); 1212 } 1213 1214 printbuf_exit(&field_err); 1215 return ret; 1216 } 1217 1218 void __bch2_sb_field_to_text(struct printbuf *out, struct bch_sb *sb, 1219 struct bch_sb_field *f) 1220 { 1221 unsigned type = le32_to_cpu(f->type); 1222 const struct bch_sb_field_ops *ops = bch2_sb_field_type_ops(type); 1223 1224 if (!out->nr_tabstops) 1225 printbuf_tabstop_push(out, 32); 1226 1227 if (ops->to_text) 1228 ops->to_text(out, sb, f); 1229 } 1230 1231 void bch2_sb_field_to_text(struct printbuf *out, struct bch_sb *sb, 1232 struct bch_sb_field *f) 1233 { 1234 unsigned type = le32_to_cpu(f->type); 1235 1236 if (type < BCH_SB_FIELD_NR) 1237 prt_printf(out, "%s", bch2_sb_fields[type]); 1238 else 1239 prt_printf(out, "(unknown field %u)", type); 1240 1241 prt_printf(out, " (size %zu):", vstruct_bytes(f)); 1242 prt_newline(out); 1243 1244 __bch2_sb_field_to_text(out, sb, f); 1245 } 1246 1247 void bch2_sb_layout_to_text(struct printbuf *out, struct bch_sb_layout *l) 1248 { 1249 unsigned i; 1250 1251 prt_printf(out, "Type: %u", l->layout_type); 1252 prt_newline(out); 1253 1254 prt_str(out, "Superblock max size: "); 1255 prt_units_u64(out, 512 << l->sb_max_size_bits); 1256 prt_newline(out); 1257 1258 prt_printf(out, "Nr superblocks: %u", l->nr_superblocks); 1259 prt_newline(out); 1260 1261 prt_str(out, "Offsets: "); 1262 for (i = 0; i < l->nr_superblocks; i++) { 1263 if (i) 1264 prt_str(out, ", "); 1265 prt_printf(out, "%llu", le64_to_cpu(l->sb_offset[i])); 1266 } 1267 prt_newline(out); 1268 } 1269 1270 void bch2_sb_to_text(struct printbuf *out, struct bch_sb *sb, 1271 bool print_layout, unsigned fields) 1272 { 1273 u64 fields_have = 0; 1274 unsigned nr_devices = 0; 1275 1276 if (!out->nr_tabstops) 1277 printbuf_tabstop_push(out, 44); 1278 1279 for (int i = 0; i < sb->nr_devices; i++) 1280 nr_devices += bch2_dev_exists(sb, i); 1281 1282 prt_printf(out, "External UUID:"); 1283 prt_tab(out); 1284 pr_uuid(out, sb->user_uuid.b); 1285 prt_newline(out); 1286 1287 prt_printf(out, "Internal UUID:"); 1288 prt_tab(out); 1289 pr_uuid(out, sb->uuid.b); 1290 prt_newline(out); 1291 1292 prt_printf(out, "Magic number:"); 1293 prt_tab(out); 1294 pr_uuid(out, sb->magic.b); 1295 prt_newline(out); 1296 1297 prt_str(out, "Device index:"); 1298 prt_tab(out); 1299 prt_printf(out, "%u", sb->dev_idx); 1300 prt_newline(out); 1301 1302 prt_str(out, "Label:"); 1303 prt_tab(out); 1304 prt_printf(out, "%.*s", (int) sizeof(sb->label), sb->label); 1305 prt_newline(out); 1306 1307 prt_str(out, "Version:"); 1308 prt_tab(out); 1309 bch2_version_to_text(out, le16_to_cpu(sb->version)); 1310 prt_newline(out); 1311 1312 prt_str(out, "Version upgrade complete:"); 1313 prt_tab(out); 1314 bch2_version_to_text(out, BCH_SB_VERSION_UPGRADE_COMPLETE(sb)); 1315 prt_newline(out); 1316 1317 prt_printf(out, "Oldest version on disk:"); 1318 prt_tab(out); 1319 bch2_version_to_text(out, le16_to_cpu(sb->version_min)); 1320 prt_newline(out); 1321 1322 prt_printf(out, "Created:"); 1323 prt_tab(out); 1324 if (sb->time_base_lo) 1325 bch2_prt_datetime(out, div_u64(le64_to_cpu(sb->time_base_lo), NSEC_PER_SEC)); 1326 else 1327 prt_printf(out, "(not set)"); 1328 prt_newline(out); 1329 1330 prt_printf(out, "Sequence number:"); 1331 prt_tab(out); 1332 prt_printf(out, "%llu", le64_to_cpu(sb->seq)); 1333 prt_newline(out); 1334 1335 prt_printf(out, "Time of last write:"); 1336 prt_tab(out); 1337 bch2_prt_datetime(out, le64_to_cpu(sb->write_time)); 1338 prt_newline(out); 1339 1340 prt_printf(out, "Superblock size:"); 1341 prt_tab(out); 1342 prt_units_u64(out, vstruct_bytes(sb)); 1343 prt_str(out, "/"); 1344 prt_units_u64(out, 512ULL << sb->layout.sb_max_size_bits); 1345 prt_newline(out); 1346 1347 prt_printf(out, "Clean:"); 1348 prt_tab(out); 1349 prt_printf(out, "%llu", BCH_SB_CLEAN(sb)); 1350 prt_newline(out); 1351 1352 prt_printf(out, "Devices:"); 1353 prt_tab(out); 1354 prt_printf(out, "%u", nr_devices); 1355 prt_newline(out); 1356 1357 prt_printf(out, "Sections:"); 1358 vstruct_for_each(sb, f) 1359 fields_have |= 1 << le32_to_cpu(f->type); 1360 prt_tab(out); 1361 prt_bitflags(out, bch2_sb_fields, fields_have); 1362 prt_newline(out); 1363 1364 prt_printf(out, "Features:"); 1365 prt_tab(out); 1366 prt_bitflags(out, bch2_sb_features, le64_to_cpu(sb->features[0])); 1367 prt_newline(out); 1368 1369 prt_printf(out, "Compat features:"); 1370 prt_tab(out); 1371 prt_bitflags(out, bch2_sb_compat, le64_to_cpu(sb->compat[0])); 1372 prt_newline(out); 1373 1374 prt_newline(out); 1375 prt_printf(out, "Options:"); 1376 prt_newline(out); 1377 printbuf_indent_add(out, 2); 1378 { 1379 enum bch_opt_id id; 1380 1381 for (id = 0; id < bch2_opts_nr; id++) { 1382 const struct bch_option *opt = bch2_opt_table + id; 1383 1384 if (opt->get_sb != BCH2_NO_SB_OPT) { 1385 u64 v = bch2_opt_from_sb(sb, id); 1386 1387 prt_printf(out, "%s:", opt->attr.name); 1388 prt_tab(out); 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