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 if (layout->sb_max_size_bits > BCH_SB_LAYOUT_SIZE_BITS_MAX) { 291 prt_printf(out, "Invalid superblock layout: max_size_bits too high"); 292 return -BCH_ERR_invalid_sb_layout_sb_max_size_bits; 293 } 294 295 max_sectors = 1 << layout->sb_max_size_bits; 296 297 prev_offset = le64_to_cpu(layout->sb_offset[0]); 298 299 for (i = 1; i < layout->nr_superblocks; i++) { 300 offset = le64_to_cpu(layout->sb_offset[i]); 301 302 if (offset < prev_offset + max_sectors) { 303 prt_printf(out, "Invalid superblock layout: superblocks overlap\n" 304 " (sb %u ends at %llu next starts at %llu", 305 i - 1, prev_offset + max_sectors, offset); 306 return -BCH_ERR_invalid_sb_layout_superblocks_overlap; 307 } 308 prev_offset = offset; 309 } 310 311 return 0; 312 } 313 314 static int bch2_sb_compatible(struct bch_sb *sb, struct printbuf *out) 315 { 316 u16 version = le16_to_cpu(sb->version); 317 u16 version_min = le16_to_cpu(sb->version_min); 318 319 if (!bch2_version_compatible(version)) { 320 prt_str(out, "Unsupported superblock version "); 321 bch2_version_to_text(out, version); 322 prt_str(out, " (min "); 323 bch2_version_to_text(out, bcachefs_metadata_version_min); 324 prt_str(out, ", max "); 325 bch2_version_to_text(out, bcachefs_metadata_version_current); 326 prt_str(out, ")"); 327 return -BCH_ERR_invalid_sb_version; 328 } 329 330 if (!bch2_version_compatible(version_min)) { 331 prt_str(out, "Unsupported superblock version_min "); 332 bch2_version_to_text(out, version_min); 333 prt_str(out, " (min "); 334 bch2_version_to_text(out, bcachefs_metadata_version_min); 335 prt_str(out, ", max "); 336 bch2_version_to_text(out, bcachefs_metadata_version_current); 337 prt_str(out, ")"); 338 return -BCH_ERR_invalid_sb_version; 339 } 340 341 if (version_min > version) { 342 prt_str(out, "Bad minimum version "); 343 bch2_version_to_text(out, version_min); 344 prt_str(out, ", greater than version field "); 345 bch2_version_to_text(out, version); 346 return -BCH_ERR_invalid_sb_version; 347 } 348 349 return 0; 350 } 351 352 static int bch2_sb_validate(struct bch_sb_handle *disk_sb, 353 enum bch_validate_flags flags, struct printbuf *out) 354 { 355 struct bch_sb *sb = disk_sb->sb; 356 struct bch_sb_field_members_v1 *mi; 357 enum bch_opt_id opt_id; 358 u16 block_size; 359 int ret; 360 361 ret = bch2_sb_compatible(sb, out); 362 if (ret) 363 return ret; 364 365 if (sb->features[1] || 366 (le64_to_cpu(sb->features[0]) & (~0ULL << BCH_FEATURE_NR))) { 367 prt_printf(out, "Filesystem has incompatible features"); 368 return -BCH_ERR_invalid_sb_features; 369 } 370 371 block_size = le16_to_cpu(sb->block_size); 372 373 if (block_size > PAGE_SECTORS) { 374 prt_printf(out, "Block size too big (got %u, max %u)", 375 block_size, PAGE_SECTORS); 376 return -BCH_ERR_invalid_sb_block_size; 377 } 378 379 if (bch2_is_zero(sb->user_uuid.b, sizeof(sb->user_uuid))) { 380 prt_printf(out, "Bad user UUID (got zeroes)"); 381 return -BCH_ERR_invalid_sb_uuid; 382 } 383 384 if (bch2_is_zero(sb->uuid.b, sizeof(sb->uuid))) { 385 prt_printf(out, "Bad internal UUID (got zeroes)"); 386 return -BCH_ERR_invalid_sb_uuid; 387 } 388 389 if (!sb->nr_devices || 390 sb->nr_devices > BCH_SB_MEMBERS_MAX) { 391 prt_printf(out, "Bad number of member devices %u (max %u)", 392 sb->nr_devices, BCH_SB_MEMBERS_MAX); 393 return -BCH_ERR_invalid_sb_too_many_members; 394 } 395 396 if (sb->dev_idx >= sb->nr_devices) { 397 prt_printf(out, "Bad dev_idx (got %u, nr_devices %u)", 398 sb->dev_idx, sb->nr_devices); 399 return -BCH_ERR_invalid_sb_dev_idx; 400 } 401 402 if (!sb->time_precision || 403 le32_to_cpu(sb->time_precision) > NSEC_PER_SEC) { 404 prt_printf(out, "Invalid time precision: %u (min 1, max %lu)", 405 le32_to_cpu(sb->time_precision), NSEC_PER_SEC); 406 return -BCH_ERR_invalid_sb_time_precision; 407 } 408 409 if (!flags) { 410 /* 411 * Been seeing a bug where these are getting inexplicably 412 * zeroed, so we're now validating them, but we have to be 413 * careful not to preven people's filesystems from mounting: 414 */ 415 if (!BCH_SB_JOURNAL_FLUSH_DELAY(sb)) 416 SET_BCH_SB_JOURNAL_FLUSH_DELAY(sb, 1000); 417 if (!BCH_SB_JOURNAL_RECLAIM_DELAY(sb)) 418 SET_BCH_SB_JOURNAL_RECLAIM_DELAY(sb, 1000); 419 420 if (!BCH_SB_VERSION_UPGRADE_COMPLETE(sb)) 421 SET_BCH_SB_VERSION_UPGRADE_COMPLETE(sb, le16_to_cpu(sb->version)); 422 423 if (le16_to_cpu(sb->version) <= bcachefs_metadata_version_disk_accounting_v2 && 424 !BCH_SB_ALLOCATOR_STUCK_TIMEOUT(sb)) 425 SET_BCH_SB_ALLOCATOR_STUCK_TIMEOUT(sb, 30); 426 427 if (le16_to_cpu(sb->version) <= bcachefs_metadata_version_disk_accounting_v2) 428 SET_BCH_SB_PROMOTE_WHOLE_EXTENTS(sb, true); 429 } 430 431 for (opt_id = 0; opt_id < bch2_opts_nr; opt_id++) { 432 const struct bch_option *opt = bch2_opt_table + opt_id; 433 434 if (opt->get_sb != BCH2_NO_SB_OPT) { 435 u64 v = bch2_opt_from_sb(sb, opt_id); 436 437 prt_printf(out, "Invalid option "); 438 ret = bch2_opt_validate(opt, v, out); 439 if (ret) 440 return ret; 441 442 printbuf_reset(out); 443 } 444 } 445 446 /* validate layout */ 447 ret = validate_sb_layout(&sb->layout, out); 448 if (ret) 449 return ret; 450 451 vstruct_for_each(sb, f) { 452 if (!f->u64s) { 453 prt_printf(out, "Invalid superblock: optional field with size 0 (type %u)", 454 le32_to_cpu(f->type)); 455 return -BCH_ERR_invalid_sb_field_size; 456 } 457 458 if (vstruct_next(f) > vstruct_last(sb)) { 459 prt_printf(out, "Invalid superblock: optional field extends past end of superblock (type %u)", 460 le32_to_cpu(f->type)); 461 return -BCH_ERR_invalid_sb_field_size; 462 } 463 } 464 465 /* members must be validated first: */ 466 mi = bch2_sb_field_get(sb, members_v1); 467 if (!mi) { 468 prt_printf(out, "Invalid superblock: member info area missing"); 469 return -BCH_ERR_invalid_sb_members_missing; 470 } 471 472 ret = bch2_sb_field_validate(sb, &mi->field, flags, out); 473 if (ret) 474 return ret; 475 476 vstruct_for_each(sb, f) { 477 if (le32_to_cpu(f->type) == BCH_SB_FIELD_members_v1) 478 continue; 479 480 ret = bch2_sb_field_validate(sb, f, flags, out); 481 if (ret) 482 return ret; 483 } 484 485 if ((flags & BCH_VALIDATE_write) && 486 bch2_sb_member_get(sb, sb->dev_idx).seq != sb->seq) { 487 prt_printf(out, "Invalid superblock: member seq %llu != sb seq %llu", 488 le64_to_cpu(bch2_sb_member_get(sb, sb->dev_idx).seq), 489 le64_to_cpu(sb->seq)); 490 return -BCH_ERR_invalid_sb_members_missing; 491 } 492 493 return 0; 494 } 495 496 /* device open: */ 497 498 static unsigned long le_ulong_to_cpu(unsigned long v) 499 { 500 return sizeof(unsigned long) == 8 501 ? le64_to_cpu(v) 502 : le32_to_cpu(v); 503 } 504 505 static void le_bitvector_to_cpu(unsigned long *dst, unsigned long *src, unsigned nr) 506 { 507 BUG_ON(nr & (BITS_PER_TYPE(long) - 1)); 508 509 for (unsigned i = 0; i < BITS_TO_LONGS(nr); i++) 510 dst[i] = le_ulong_to_cpu(src[i]); 511 } 512 513 static void bch2_sb_update(struct bch_fs *c) 514 { 515 struct bch_sb *src = c->disk_sb.sb; 516 517 lockdep_assert_held(&c->sb_lock); 518 519 c->sb.uuid = src->uuid; 520 c->sb.user_uuid = src->user_uuid; 521 c->sb.version = le16_to_cpu(src->version); 522 c->sb.version_min = le16_to_cpu(src->version_min); 523 c->sb.version_upgrade_complete = BCH_SB_VERSION_UPGRADE_COMPLETE(src); 524 c->sb.nr_devices = src->nr_devices; 525 c->sb.clean = BCH_SB_CLEAN(src); 526 c->sb.encryption_type = BCH_SB_ENCRYPTION_TYPE(src); 527 528 c->sb.nsec_per_time_unit = le32_to_cpu(src->time_precision); 529 c->sb.time_units_per_sec = NSEC_PER_SEC / c->sb.nsec_per_time_unit; 530 531 /* XXX this is wrong, we need a 96 or 128 bit integer type */ 532 c->sb.time_base_lo = div_u64(le64_to_cpu(src->time_base_lo), 533 c->sb.nsec_per_time_unit); 534 c->sb.time_base_hi = le32_to_cpu(src->time_base_hi); 535 536 c->sb.features = le64_to_cpu(src->features[0]); 537 c->sb.compat = le64_to_cpu(src->compat[0]); 538 539 memset(c->sb.errors_silent, 0, sizeof(c->sb.errors_silent)); 540 541 struct bch_sb_field_ext *ext = bch2_sb_field_get(src, ext); 542 if (ext) { 543 le_bitvector_to_cpu(c->sb.errors_silent, (void *) ext->errors_silent, 544 sizeof(c->sb.errors_silent) * 8); 545 c->sb.btrees_lost_data = le64_to_cpu(ext->btrees_lost_data); 546 } 547 548 for_each_member_device(c, ca) { 549 struct bch_member m = bch2_sb_member_get(src, ca->dev_idx); 550 ca->mi = bch2_mi_to_cpu(&m); 551 } 552 } 553 554 static int __copy_super(struct bch_sb_handle *dst_handle, struct bch_sb *src) 555 { 556 struct bch_sb_field *src_f, *dst_f; 557 struct bch_sb *dst = dst_handle->sb; 558 unsigned i; 559 560 dst->version = src->version; 561 dst->version_min = src->version_min; 562 dst->seq = src->seq; 563 dst->uuid = src->uuid; 564 dst->user_uuid = src->user_uuid; 565 memcpy(dst->label, src->label, sizeof(dst->label)); 566 567 dst->block_size = src->block_size; 568 dst->nr_devices = src->nr_devices; 569 570 dst->time_base_lo = src->time_base_lo; 571 dst->time_base_hi = src->time_base_hi; 572 dst->time_precision = src->time_precision; 573 dst->write_time = src->write_time; 574 575 memcpy(dst->flags, src->flags, sizeof(dst->flags)); 576 memcpy(dst->features, src->features, sizeof(dst->features)); 577 memcpy(dst->compat, src->compat, sizeof(dst->compat)); 578 579 for (i = 0; i < BCH_SB_FIELD_NR; i++) { 580 int d; 581 582 if ((1U << i) & BCH_SINGLE_DEVICE_SB_FIELDS) 583 continue; 584 585 src_f = bch2_sb_field_get_id(src, i); 586 dst_f = bch2_sb_field_get_id(dst, i); 587 588 d = (src_f ? le32_to_cpu(src_f->u64s) : 0) - 589 (dst_f ? le32_to_cpu(dst_f->u64s) : 0); 590 if (d > 0) { 591 int ret = bch2_sb_realloc(dst_handle, 592 le32_to_cpu(dst_handle->sb->u64s) + d); 593 594 if (ret) 595 return ret; 596 597 dst = dst_handle->sb; 598 dst_f = bch2_sb_field_get_id(dst, i); 599 } 600 601 dst_f = __bch2_sb_field_resize(dst_handle, dst_f, 602 src_f ? le32_to_cpu(src_f->u64s) : 0); 603 604 if (src_f) 605 memcpy(dst_f, src_f, vstruct_bytes(src_f)); 606 } 607 608 return 0; 609 } 610 611 int bch2_sb_to_fs(struct bch_fs *c, struct bch_sb *src) 612 { 613 int ret; 614 615 lockdep_assert_held(&c->sb_lock); 616 617 ret = bch2_sb_realloc(&c->disk_sb, 0) ?: 618 __copy_super(&c->disk_sb, src) ?: 619 bch2_sb_replicas_to_cpu_replicas(c) ?: 620 bch2_sb_disk_groups_to_cpu(c); 621 if (ret) 622 return ret; 623 624 bch2_sb_update(c); 625 return 0; 626 } 627 628 int bch2_sb_from_fs(struct bch_fs *c, struct bch_dev *ca) 629 { 630 return __copy_super(&ca->disk_sb, c->disk_sb.sb); 631 } 632 633 /* read superblock: */ 634 635 static int read_one_super(struct bch_sb_handle *sb, u64 offset, struct printbuf *err) 636 { 637 size_t bytes; 638 int ret; 639 reread: 640 bio_reset(sb->bio, sb->bdev, REQ_OP_READ|REQ_SYNC|REQ_META); 641 sb->bio->bi_iter.bi_sector = offset; 642 bch2_bio_map(sb->bio, sb->sb, sb->buffer_size); 643 644 ret = submit_bio_wait(sb->bio); 645 if (ret) { 646 prt_printf(err, "IO error: %i", ret); 647 return ret; 648 } 649 650 if (!uuid_equal(&sb->sb->magic, &BCACHE_MAGIC) && 651 !uuid_equal(&sb->sb->magic, &BCHFS_MAGIC)) { 652 prt_str(err, "Not a bcachefs superblock (got magic "); 653 pr_uuid(err, sb->sb->magic.b); 654 prt_str(err, ")"); 655 return -BCH_ERR_invalid_sb_magic; 656 } 657 658 ret = bch2_sb_compatible(sb->sb, err); 659 if (ret) 660 return ret; 661 662 bytes = vstruct_bytes(sb->sb); 663 664 u64 sb_size = 512ULL << min(BCH_SB_LAYOUT_SIZE_BITS_MAX, sb->sb->layout.sb_max_size_bits); 665 if (bytes > sb_size) { 666 prt_printf(err, "Invalid superblock: too big (got %zu bytes, layout max %llu)", 667 bytes, sb_size); 668 return -BCH_ERR_invalid_sb_too_big; 669 } 670 671 if (bytes > sb->buffer_size) { 672 ret = bch2_sb_realloc(sb, le32_to_cpu(sb->sb->u64s)); 673 if (ret) 674 return ret; 675 goto reread; 676 } 677 678 enum bch_csum_type csum_type = BCH_SB_CSUM_TYPE(sb->sb); 679 if (csum_type >= BCH_CSUM_NR) { 680 prt_printf(err, "unknown checksum type %llu", BCH_SB_CSUM_TYPE(sb->sb)); 681 return -BCH_ERR_invalid_sb_csum_type; 682 } 683 684 /* XXX: verify MACs */ 685 struct bch_csum csum = csum_vstruct(NULL, csum_type, null_nonce(), sb->sb); 686 if (bch2_crc_cmp(csum, sb->sb->csum)) { 687 bch2_csum_err_msg(err, csum_type, sb->sb->csum, csum); 688 return -BCH_ERR_invalid_sb_csum; 689 } 690 691 sb->seq = le64_to_cpu(sb->sb->seq); 692 693 return 0; 694 } 695 696 static int __bch2_read_super(const char *path, struct bch_opts *opts, 697 struct bch_sb_handle *sb, bool ignore_notbchfs_msg) 698 { 699 u64 offset = opt_get(*opts, sb); 700 struct bch_sb_layout layout; 701 struct printbuf err = PRINTBUF; 702 struct printbuf err2 = PRINTBUF; 703 __le64 *i; 704 int ret; 705 #ifndef __KERNEL__ 706 retry: 707 #endif 708 memset(sb, 0, sizeof(*sb)); 709 sb->mode = BLK_OPEN_READ; 710 sb->have_bio = true; 711 sb->holder = kmalloc(1, GFP_KERNEL); 712 if (!sb->holder) 713 return -ENOMEM; 714 715 sb->sb_name = kstrdup(path, GFP_KERNEL); 716 if (!sb->sb_name) { 717 ret = -ENOMEM; 718 prt_printf(&err, "error allocating memory for sb_name"); 719 goto err; 720 } 721 722 #ifndef __KERNEL__ 723 if (opt_get(*opts, direct_io) == false) 724 sb->mode |= BLK_OPEN_BUFFERED; 725 #endif 726 727 if (!opt_get(*opts, noexcl)) 728 sb->mode |= BLK_OPEN_EXCL; 729 730 if (!opt_get(*opts, nochanges)) 731 sb->mode |= BLK_OPEN_WRITE; 732 733 sb->s_bdev_file = bdev_file_open_by_path(path, sb->mode, sb->holder, &bch2_sb_handle_bdev_ops); 734 if (IS_ERR(sb->s_bdev_file) && 735 PTR_ERR(sb->s_bdev_file) == -EACCES && 736 opt_get(*opts, read_only)) { 737 sb->mode &= ~BLK_OPEN_WRITE; 738 739 sb->s_bdev_file = bdev_file_open_by_path(path, sb->mode, sb->holder, &bch2_sb_handle_bdev_ops); 740 if (!IS_ERR(sb->s_bdev_file)) 741 opt_set(*opts, nochanges, true); 742 } 743 744 if (IS_ERR(sb->s_bdev_file)) { 745 ret = PTR_ERR(sb->s_bdev_file); 746 prt_printf(&err, "error opening %s: %s", path, bch2_err_str(ret)); 747 goto err; 748 } 749 sb->bdev = file_bdev(sb->s_bdev_file); 750 751 ret = bch2_sb_realloc(sb, 0); 752 if (ret) { 753 prt_printf(&err, "error allocating memory for superblock"); 754 goto err; 755 } 756 757 if (bch2_fs_init_fault("read_super")) { 758 prt_printf(&err, "dynamic fault"); 759 ret = -EFAULT; 760 goto err; 761 } 762 763 ret = read_one_super(sb, offset, &err); 764 if (!ret) 765 goto got_super; 766 767 if (opt_defined(*opts, sb)) 768 goto err; 769 770 prt_printf(&err2, "bcachefs (%s): error reading default superblock: %s\n", 771 path, err.buf); 772 if (ret == -BCH_ERR_invalid_sb_magic && ignore_notbchfs_msg) 773 bch2_print_opts(opts, KERN_INFO "%s", err2.buf); 774 else 775 bch2_print_opts(opts, KERN_ERR "%s", err2.buf); 776 777 printbuf_exit(&err2); 778 printbuf_reset(&err); 779 780 /* 781 * Error reading primary superblock - read location of backup 782 * superblocks: 783 */ 784 bio_reset(sb->bio, sb->bdev, REQ_OP_READ|REQ_SYNC|REQ_META); 785 sb->bio->bi_iter.bi_sector = BCH_SB_LAYOUT_SECTOR; 786 /* 787 * use sb buffer to read layout, since sb buffer is page aligned but 788 * layout won't be: 789 */ 790 bch2_bio_map(sb->bio, sb->sb, sizeof(struct bch_sb_layout)); 791 792 ret = submit_bio_wait(sb->bio); 793 if (ret) { 794 prt_printf(&err, "IO error: %i", ret); 795 goto err; 796 } 797 798 memcpy(&layout, sb->sb, sizeof(layout)); 799 ret = validate_sb_layout(&layout, &err); 800 if (ret) 801 goto err; 802 803 for (i = layout.sb_offset; 804 i < layout.sb_offset + layout.nr_superblocks; i++) { 805 offset = le64_to_cpu(*i); 806 807 if (offset == opt_get(*opts, sb)) { 808 ret = -BCH_ERR_invalid; 809 continue; 810 } 811 812 ret = read_one_super(sb, offset, &err); 813 if (!ret) 814 goto got_super; 815 } 816 817 goto err; 818 819 got_super: 820 if (le16_to_cpu(sb->sb->block_size) << 9 < 821 bdev_logical_block_size(sb->bdev) && 822 opt_get(*opts, direct_io)) { 823 #ifndef __KERNEL__ 824 opt_set(*opts, direct_io, false); 825 bch2_free_super(sb); 826 goto retry; 827 #endif 828 prt_printf(&err, "block size (%u) smaller than device block size (%u)", 829 le16_to_cpu(sb->sb->block_size) << 9, 830 bdev_logical_block_size(sb->bdev)); 831 ret = -BCH_ERR_block_size_too_small; 832 goto err; 833 } 834 835 sb->have_layout = true; 836 837 ret = bch2_sb_validate(sb, 0, &err); 838 if (ret) { 839 bch2_print_opts(opts, KERN_ERR "bcachefs (%s): error validating superblock: %s\n", 840 path, err.buf); 841 goto err_no_print; 842 } 843 out: 844 printbuf_exit(&err); 845 return ret; 846 err: 847 bch2_print_opts(opts, KERN_ERR "bcachefs (%s): error reading superblock: %s\n", 848 path, err.buf); 849 err_no_print: 850 bch2_free_super(sb); 851 goto out; 852 } 853 854 int bch2_read_super(const char *path, struct bch_opts *opts, 855 struct bch_sb_handle *sb) 856 { 857 return __bch2_read_super(path, opts, sb, false); 858 } 859 860 /* provide a silenced version for mount.bcachefs */ 861 862 int bch2_read_super_silent(const char *path, struct bch_opts *opts, 863 struct bch_sb_handle *sb) 864 { 865 return __bch2_read_super(path, opts, sb, true); 866 } 867 868 /* write superblock: */ 869 870 static void write_super_endio(struct bio *bio) 871 { 872 struct bch_dev *ca = bio->bi_private; 873 874 /* XXX: return errors directly */ 875 876 if (bch2_dev_io_err_on(bio->bi_status, ca, 877 bio_data_dir(bio) 878 ? BCH_MEMBER_ERROR_write 879 : BCH_MEMBER_ERROR_read, 880 "superblock %s error: %s", 881 bio_data_dir(bio) ? "write" : "read", 882 bch2_blk_status_to_str(bio->bi_status))) 883 ca->sb_write_error = 1; 884 885 closure_put(&ca->fs->sb_write); 886 percpu_ref_put(&ca->io_ref); 887 } 888 889 static void read_back_super(struct bch_fs *c, struct bch_dev *ca) 890 { 891 struct bch_sb *sb = ca->disk_sb.sb; 892 struct bio *bio = ca->disk_sb.bio; 893 894 bio_reset(bio, ca->disk_sb.bdev, REQ_OP_READ|REQ_SYNC|REQ_META); 895 bio->bi_iter.bi_sector = le64_to_cpu(sb->layout.sb_offset[0]); 896 bio->bi_end_io = write_super_endio; 897 bio->bi_private = ca; 898 bch2_bio_map(bio, ca->sb_read_scratch, PAGE_SIZE); 899 900 this_cpu_add(ca->io_done->sectors[READ][BCH_DATA_sb], 901 bio_sectors(bio)); 902 903 percpu_ref_get(&ca->io_ref); 904 closure_bio_submit(bio, &c->sb_write); 905 } 906 907 static void write_one_super(struct bch_fs *c, struct bch_dev *ca, unsigned idx) 908 { 909 struct bch_sb *sb = ca->disk_sb.sb; 910 struct bio *bio = ca->disk_sb.bio; 911 912 sb->offset = sb->layout.sb_offset[idx]; 913 914 SET_BCH_SB_CSUM_TYPE(sb, bch2_csum_opt_to_type(c->opts.metadata_checksum, false)); 915 sb->csum = csum_vstruct(c, BCH_SB_CSUM_TYPE(sb), 916 null_nonce(), sb); 917 918 bio_reset(bio, ca->disk_sb.bdev, REQ_OP_WRITE|REQ_SYNC|REQ_META); 919 bio->bi_iter.bi_sector = le64_to_cpu(sb->offset); 920 bio->bi_end_io = write_super_endio; 921 bio->bi_private = ca; 922 bch2_bio_map(bio, sb, 923 roundup((size_t) vstruct_bytes(sb), 924 bdev_logical_block_size(ca->disk_sb.bdev))); 925 926 this_cpu_add(ca->io_done->sectors[WRITE][BCH_DATA_sb], 927 bio_sectors(bio)); 928 929 percpu_ref_get(&ca->io_ref); 930 closure_bio_submit(bio, &c->sb_write); 931 } 932 933 int bch2_write_super(struct bch_fs *c) 934 { 935 struct closure *cl = &c->sb_write; 936 struct printbuf err = PRINTBUF; 937 unsigned sb = 0, nr_wrote; 938 struct bch_devs_mask sb_written; 939 bool wrote, can_mount_without_written, can_mount_with_written; 940 unsigned degraded_flags = BCH_FORCE_IF_DEGRADED; 941 DARRAY(struct bch_dev *) online_devices = {}; 942 int ret = 0; 943 944 trace_and_count(c, write_super, c, _RET_IP_); 945 946 if (c->opts.very_degraded) 947 degraded_flags |= BCH_FORCE_IF_LOST; 948 949 lockdep_assert_held(&c->sb_lock); 950 951 closure_init_stack(cl); 952 memset(&sb_written, 0, sizeof(sb_written)); 953 954 for_each_online_member(c, ca) { 955 ret = darray_push(&online_devices, ca); 956 if (bch2_fs_fatal_err_on(ret, c, "%s: error allocating online devices", __func__)) { 957 percpu_ref_put(&ca->io_ref); 958 goto out; 959 } 960 percpu_ref_get(&ca->io_ref); 961 } 962 963 /* Make sure we're using the new magic numbers: */ 964 c->disk_sb.sb->magic = BCHFS_MAGIC; 965 c->disk_sb.sb->layout.magic = BCHFS_MAGIC; 966 967 le64_add_cpu(&c->disk_sb.sb->seq, 1); 968 969 struct bch_sb_field_members_v2 *mi = bch2_sb_field_get(c->disk_sb.sb, members_v2); 970 darray_for_each(online_devices, ca) 971 __bch2_members_v2_get_mut(mi, (*ca)->dev_idx)->seq = c->disk_sb.sb->seq; 972 c->disk_sb.sb->write_time = cpu_to_le64(ktime_get_real_seconds()); 973 974 if (test_bit(BCH_FS_error, &c->flags)) 975 SET_BCH_SB_HAS_ERRORS(c->disk_sb.sb, 1); 976 if (test_bit(BCH_FS_topology_error, &c->flags)) 977 SET_BCH_SB_HAS_TOPOLOGY_ERRORS(c->disk_sb.sb, 1); 978 979 SET_BCH_SB_BIG_ENDIAN(c->disk_sb.sb, CPU_BIG_ENDIAN); 980 981 bch2_sb_counters_from_cpu(c); 982 bch2_sb_members_from_cpu(c); 983 bch2_sb_members_cpy_v2_v1(&c->disk_sb); 984 bch2_sb_errors_from_cpu(c); 985 bch2_sb_downgrade_update(c); 986 987 darray_for_each(online_devices, ca) 988 bch2_sb_from_fs(c, (*ca)); 989 990 darray_for_each(online_devices, ca) { 991 printbuf_reset(&err); 992 993 ret = bch2_sb_validate(&(*ca)->disk_sb, BCH_VALIDATE_write, &err); 994 if (ret) { 995 bch2_fs_inconsistent(c, "sb invalid before write: %s", err.buf); 996 goto out; 997 } 998 } 999 1000 if (c->opts.nochanges) 1001 goto out; 1002 1003 /* 1004 * Defer writing the superblock until filesystem initialization is 1005 * complete - don't write out a partly initialized superblock: 1006 */ 1007 if (!BCH_SB_INITIALIZED(c->disk_sb.sb)) 1008 goto out; 1009 1010 if (le16_to_cpu(c->disk_sb.sb->version) > bcachefs_metadata_version_current) { 1011 struct printbuf buf = PRINTBUF; 1012 prt_printf(&buf, "attempting to write superblock that wasn't version downgraded ("); 1013 bch2_version_to_text(&buf, le16_to_cpu(c->disk_sb.sb->version)); 1014 prt_str(&buf, " > "); 1015 bch2_version_to_text(&buf, bcachefs_metadata_version_current); 1016 prt_str(&buf, ")"); 1017 bch2_fs_fatal_error(c, ": %s", buf.buf); 1018 printbuf_exit(&buf); 1019 return -BCH_ERR_sb_not_downgraded; 1020 } 1021 1022 darray_for_each(online_devices, ca) { 1023 __set_bit((*ca)->dev_idx, sb_written.d); 1024 (*ca)->sb_write_error = 0; 1025 } 1026 1027 darray_for_each(online_devices, ca) 1028 read_back_super(c, *ca); 1029 closure_sync(cl); 1030 1031 darray_for_each(online_devices, cap) { 1032 struct bch_dev *ca = *cap; 1033 1034 if (ca->sb_write_error) 1035 continue; 1036 1037 if (le64_to_cpu(ca->sb_read_scratch->seq) < ca->disk_sb.seq) { 1038 struct printbuf buf = PRINTBUF; 1039 prt_char(&buf, ' '); 1040 prt_bdevname(&buf, ca->disk_sb.bdev); 1041 prt_printf(&buf, 1042 ": Superblock write was silently dropped! (seq %llu expected %llu)", 1043 le64_to_cpu(ca->sb_read_scratch->seq), 1044 ca->disk_sb.seq); 1045 bch2_fs_fatal_error(c, "%s", buf.buf); 1046 printbuf_exit(&buf); 1047 ret = -BCH_ERR_erofs_sb_err; 1048 } 1049 1050 if (le64_to_cpu(ca->sb_read_scratch->seq) > ca->disk_sb.seq) { 1051 struct printbuf buf = PRINTBUF; 1052 prt_char(&buf, ' '); 1053 prt_bdevname(&buf, ca->disk_sb.bdev); 1054 prt_printf(&buf, 1055 ": Superblock modified by another process (seq %llu expected %llu)", 1056 le64_to_cpu(ca->sb_read_scratch->seq), 1057 ca->disk_sb.seq); 1058 bch2_fs_fatal_error(c, "%s", buf.buf); 1059 printbuf_exit(&buf); 1060 ret = -BCH_ERR_erofs_sb_err; 1061 } 1062 } 1063 1064 if (ret) 1065 goto out; 1066 1067 do { 1068 wrote = false; 1069 darray_for_each(online_devices, cap) { 1070 struct bch_dev *ca = *cap; 1071 if (!ca->sb_write_error && 1072 sb < ca->disk_sb.sb->layout.nr_superblocks) { 1073 write_one_super(c, ca, sb); 1074 wrote = true; 1075 } 1076 } 1077 closure_sync(cl); 1078 sb++; 1079 } while (wrote); 1080 1081 darray_for_each(online_devices, cap) { 1082 struct bch_dev *ca = *cap; 1083 if (ca->sb_write_error) 1084 __clear_bit(ca->dev_idx, sb_written.d); 1085 else 1086 ca->disk_sb.seq = le64_to_cpu(ca->disk_sb.sb->seq); 1087 } 1088 1089 nr_wrote = dev_mask_nr(&sb_written); 1090 1091 can_mount_with_written = 1092 bch2_have_enough_devs(c, sb_written, degraded_flags, false); 1093 1094 for (unsigned i = 0; i < ARRAY_SIZE(sb_written.d); i++) 1095 sb_written.d[i] = ~sb_written.d[i]; 1096 1097 can_mount_without_written = 1098 bch2_have_enough_devs(c, sb_written, degraded_flags, false); 1099 1100 /* 1101 * If we would be able to mount _without_ the devices we successfully 1102 * wrote superblocks to, we weren't able to write to enough devices: 1103 * 1104 * Exception: if we can mount without the successes because we haven't 1105 * written anything (new filesystem), we continue if we'd be able to 1106 * mount with the devices we did successfully write to: 1107 */ 1108 if (bch2_fs_fatal_err_on(!nr_wrote || 1109 !can_mount_with_written || 1110 (can_mount_without_written && 1111 !can_mount_with_written), c, 1112 ": Unable to write superblock to sufficient devices (from %ps)", 1113 (void *) _RET_IP_)) 1114 ret = -1; 1115 out: 1116 /* Make new options visible after they're persistent: */ 1117 bch2_sb_update(c); 1118 darray_for_each(online_devices, ca) 1119 percpu_ref_put(&(*ca)->io_ref); 1120 darray_exit(&online_devices); 1121 printbuf_exit(&err); 1122 return ret; 1123 } 1124 1125 void __bch2_check_set_feature(struct bch_fs *c, unsigned feat) 1126 { 1127 mutex_lock(&c->sb_lock); 1128 if (!(c->sb.features & (1ULL << feat))) { 1129 c->disk_sb.sb->features[0] |= cpu_to_le64(1ULL << feat); 1130 1131 bch2_write_super(c); 1132 } 1133 mutex_unlock(&c->sb_lock); 1134 } 1135 1136 /* Downgrade if superblock is at a higher version than currently supported: */ 1137 bool bch2_check_version_downgrade(struct bch_fs *c) 1138 { 1139 bool ret = bcachefs_metadata_version_current < c->sb.version; 1140 1141 lockdep_assert_held(&c->sb_lock); 1142 1143 /* 1144 * Downgrade, if superblock is at a higher version than currently 1145 * supported: 1146 * 1147 * c->sb will be checked before we write the superblock, so update it as 1148 * well: 1149 */ 1150 if (BCH_SB_VERSION_UPGRADE_COMPLETE(c->disk_sb.sb) > bcachefs_metadata_version_current) 1151 SET_BCH_SB_VERSION_UPGRADE_COMPLETE(c->disk_sb.sb, bcachefs_metadata_version_current); 1152 if (c->sb.version > bcachefs_metadata_version_current) 1153 c->disk_sb.sb->version = cpu_to_le16(bcachefs_metadata_version_current); 1154 if (c->sb.version_min > bcachefs_metadata_version_current) 1155 c->disk_sb.sb->version_min = cpu_to_le16(bcachefs_metadata_version_current); 1156 c->disk_sb.sb->compat[0] &= cpu_to_le64((1ULL << BCH_COMPAT_NR) - 1); 1157 return ret; 1158 } 1159 1160 void bch2_sb_upgrade(struct bch_fs *c, unsigned new_version) 1161 { 1162 lockdep_assert_held(&c->sb_lock); 1163 1164 if (BCH_VERSION_MAJOR(new_version) > 1165 BCH_VERSION_MAJOR(le16_to_cpu(c->disk_sb.sb->version))) 1166 bch2_sb_field_resize(&c->disk_sb, downgrade, 0); 1167 1168 c->disk_sb.sb->version = cpu_to_le16(new_version); 1169 c->disk_sb.sb->features[0] |= cpu_to_le64(BCH_SB_FEATURES_ALL); 1170 } 1171 1172 static int bch2_sb_ext_validate(struct bch_sb *sb, struct bch_sb_field *f, 1173 enum bch_validate_flags flags, struct printbuf *err) 1174 { 1175 if (vstruct_bytes(f) < 88) { 1176 prt_printf(err, "field too small (%zu < %u)", vstruct_bytes(f), 88); 1177 return -BCH_ERR_invalid_sb_ext; 1178 } 1179 1180 return 0; 1181 } 1182 1183 static void bch2_sb_ext_to_text(struct printbuf *out, struct bch_sb *sb, 1184 struct bch_sb_field *f) 1185 { 1186 struct bch_sb_field_ext *e = field_to_type(f, ext); 1187 1188 prt_printf(out, "Recovery passes required:\t"); 1189 prt_bitflags(out, bch2_recovery_passes, 1190 bch2_recovery_passes_from_stable(le64_to_cpu(e->recovery_passes_required[0]))); 1191 prt_newline(out); 1192 1193 unsigned long *errors_silent = kmalloc(sizeof(e->errors_silent), GFP_KERNEL); 1194 if (errors_silent) { 1195 le_bitvector_to_cpu(errors_silent, (void *) e->errors_silent, sizeof(e->errors_silent) * 8); 1196 1197 prt_printf(out, "Errors to silently fix:\t"); 1198 prt_bitflags_vector(out, bch2_sb_error_strs, errors_silent, 1199 min(BCH_FSCK_ERR_MAX, sizeof(e->errors_silent) * 8)); 1200 prt_newline(out); 1201 1202 kfree(errors_silent); 1203 } 1204 1205 prt_printf(out, "Btrees with missing data:\t"); 1206 prt_bitflags(out, __bch2_btree_ids, le64_to_cpu(e->btrees_lost_data)); 1207 prt_newline(out); 1208 } 1209 1210 static const struct bch_sb_field_ops bch_sb_field_ops_ext = { 1211 .validate = bch2_sb_ext_validate, 1212 .to_text = bch2_sb_ext_to_text, 1213 }; 1214 1215 static const struct bch_sb_field_ops *bch2_sb_field_ops[] = { 1216 #define x(f, nr) \ 1217 [BCH_SB_FIELD_##f] = &bch_sb_field_ops_##f, 1218 BCH_SB_FIELDS() 1219 #undef x 1220 }; 1221 1222 static const struct bch_sb_field_ops bch2_sb_field_null_ops; 1223 1224 static const struct bch_sb_field_ops *bch2_sb_field_type_ops(unsigned type) 1225 { 1226 return likely(type < ARRAY_SIZE(bch2_sb_field_ops)) 1227 ? bch2_sb_field_ops[type] 1228 : &bch2_sb_field_null_ops; 1229 } 1230 1231 static int bch2_sb_field_validate(struct bch_sb *sb, struct bch_sb_field *f, 1232 enum bch_validate_flags flags, struct printbuf *err) 1233 { 1234 unsigned type = le32_to_cpu(f->type); 1235 struct printbuf field_err = PRINTBUF; 1236 const struct bch_sb_field_ops *ops = bch2_sb_field_type_ops(type); 1237 int ret; 1238 1239 ret = ops->validate ? ops->validate(sb, f, flags, &field_err) : 0; 1240 if (ret) { 1241 prt_printf(err, "Invalid superblock section %s: %s", 1242 bch2_sb_fields[type], field_err.buf); 1243 prt_newline(err); 1244 bch2_sb_field_to_text(err, sb, f); 1245 } 1246 1247 printbuf_exit(&field_err); 1248 return ret; 1249 } 1250 1251 void __bch2_sb_field_to_text(struct printbuf *out, struct bch_sb *sb, 1252 struct bch_sb_field *f) 1253 { 1254 unsigned type = le32_to_cpu(f->type); 1255 const struct bch_sb_field_ops *ops = bch2_sb_field_type_ops(type); 1256 1257 if (!out->nr_tabstops) 1258 printbuf_tabstop_push(out, 32); 1259 1260 if (ops->to_text) 1261 ops->to_text(out, sb, f); 1262 } 1263 1264 void bch2_sb_field_to_text(struct printbuf *out, struct bch_sb *sb, 1265 struct bch_sb_field *f) 1266 { 1267 unsigned type = le32_to_cpu(f->type); 1268 1269 if (type < BCH_SB_FIELD_NR) 1270 prt_printf(out, "%s", bch2_sb_fields[type]); 1271 else 1272 prt_printf(out, "(unknown field %u)", type); 1273 1274 prt_printf(out, " (size %zu):", vstruct_bytes(f)); 1275 prt_newline(out); 1276 1277 __bch2_sb_field_to_text(out, sb, f); 1278 } 1279 1280 void bch2_sb_layout_to_text(struct printbuf *out, struct bch_sb_layout *l) 1281 { 1282 unsigned i; 1283 1284 prt_printf(out, "Type: %u", l->layout_type); 1285 prt_newline(out); 1286 1287 prt_str(out, "Superblock max size: "); 1288 prt_units_u64(out, 512 << l->sb_max_size_bits); 1289 prt_newline(out); 1290 1291 prt_printf(out, "Nr superblocks: %u", l->nr_superblocks); 1292 prt_newline(out); 1293 1294 prt_str(out, "Offsets: "); 1295 for (i = 0; i < l->nr_superblocks; i++) { 1296 if (i) 1297 prt_str(out, ", "); 1298 prt_printf(out, "%llu", le64_to_cpu(l->sb_offset[i])); 1299 } 1300 prt_newline(out); 1301 } 1302 1303 void bch2_sb_to_text(struct printbuf *out, struct bch_sb *sb, 1304 bool print_layout, unsigned fields) 1305 { 1306 if (!out->nr_tabstops) 1307 printbuf_tabstop_push(out, 44); 1308 1309 prt_printf(out, "External UUID:\t"); 1310 pr_uuid(out, sb->user_uuid.b); 1311 prt_newline(out); 1312 1313 prt_printf(out, "Internal UUID:\t"); 1314 pr_uuid(out, sb->uuid.b); 1315 prt_newline(out); 1316 1317 prt_printf(out, "Magic number:\t"); 1318 pr_uuid(out, sb->magic.b); 1319 prt_newline(out); 1320 1321 prt_printf(out, "Device index:\t%u\n", sb->dev_idx); 1322 1323 prt_printf(out, "Label:\t"); 1324 if (!strlen(sb->label)) 1325 prt_printf(out, "(none)"); 1326 else 1327 prt_printf(out, "%.*s", (int) sizeof(sb->label), sb->label); 1328 prt_newline(out); 1329 1330 prt_printf(out, "Version:\t"); 1331 bch2_version_to_text(out, le16_to_cpu(sb->version)); 1332 prt_newline(out); 1333 1334 prt_printf(out, "Version upgrade complete:\t"); 1335 bch2_version_to_text(out, BCH_SB_VERSION_UPGRADE_COMPLETE(sb)); 1336 prt_newline(out); 1337 1338 prt_printf(out, "Oldest version on disk:\t"); 1339 bch2_version_to_text(out, le16_to_cpu(sb->version_min)); 1340 prt_newline(out); 1341 1342 prt_printf(out, "Created:\t"); 1343 if (sb->time_base_lo) 1344 bch2_prt_datetime(out, div_u64(le64_to_cpu(sb->time_base_lo), NSEC_PER_SEC)); 1345 else 1346 prt_printf(out, "(not set)"); 1347 prt_newline(out); 1348 1349 prt_printf(out, "Sequence number:\t"); 1350 prt_printf(out, "%llu", le64_to_cpu(sb->seq)); 1351 prt_newline(out); 1352 1353 prt_printf(out, "Time of last write:\t"); 1354 bch2_prt_datetime(out, le64_to_cpu(sb->write_time)); 1355 prt_newline(out); 1356 1357 prt_printf(out, "Superblock size:\t"); 1358 prt_units_u64(out, vstruct_bytes(sb)); 1359 prt_str(out, "/"); 1360 prt_units_u64(out, 512ULL << sb->layout.sb_max_size_bits); 1361 prt_newline(out); 1362 1363 prt_printf(out, "Clean:\t%llu\n", BCH_SB_CLEAN(sb)); 1364 prt_printf(out, "Devices:\t%u\n", bch2_sb_nr_devices(sb)); 1365 1366 prt_printf(out, "Sections:\t"); 1367 u64 fields_have = 0; 1368 vstruct_for_each(sb, f) 1369 fields_have |= 1 << le32_to_cpu(f->type); 1370 prt_bitflags(out, bch2_sb_fields, fields_have); 1371 prt_newline(out); 1372 1373 prt_printf(out, "Features:\t"); 1374 prt_bitflags(out, bch2_sb_features, le64_to_cpu(sb->features[0])); 1375 prt_newline(out); 1376 1377 prt_printf(out, "Compat features:\t"); 1378 prt_bitflags(out, bch2_sb_compat, le64_to_cpu(sb->compat[0])); 1379 prt_newline(out); 1380 1381 prt_newline(out); 1382 prt_printf(out, "Options:"); 1383 prt_newline(out); 1384 printbuf_indent_add(out, 2); 1385 { 1386 enum bch_opt_id id; 1387 1388 for (id = 0; id < bch2_opts_nr; id++) { 1389 const struct bch_option *opt = bch2_opt_table + id; 1390 1391 if (opt->get_sb != BCH2_NO_SB_OPT) { 1392 u64 v = bch2_opt_from_sb(sb, id); 1393 1394 prt_printf(out, "%s:\t", opt->attr.name); 1395 bch2_opt_to_text(out, NULL, sb, opt, v, 1396 OPT_HUMAN_READABLE|OPT_SHOW_FULL_LIST); 1397 prt_newline(out); 1398 } 1399 } 1400 } 1401 1402 printbuf_indent_sub(out, 2); 1403 1404 if (print_layout) { 1405 prt_newline(out); 1406 prt_printf(out, "layout:"); 1407 prt_newline(out); 1408 printbuf_indent_add(out, 2); 1409 bch2_sb_layout_to_text(out, &sb->layout); 1410 printbuf_indent_sub(out, 2); 1411 } 1412 1413 vstruct_for_each(sb, f) 1414 if (fields & (1 << le32_to_cpu(f->type))) { 1415 prt_newline(out); 1416 bch2_sb_field_to_text(out, sb, f); 1417 } 1418 } 1419