1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * bcachefs journalling code, for btree insertions 4 * 5 * Copyright 2012 Google, Inc. 6 */ 7 8 #include "bcachefs.h" 9 #include "alloc_foreground.h" 10 #include "bkey_methods.h" 11 #include "btree_gc.h" 12 #include "btree_update.h" 13 #include "buckets.h" 14 #include "error.h" 15 #include "journal.h" 16 #include "journal_io.h" 17 #include "journal_reclaim.h" 18 #include "journal_sb.h" 19 #include "journal_seq_blacklist.h" 20 #include "trace.h" 21 22 static const char * const bch2_journal_errors[] = { 23 #define x(n) #n, 24 JOURNAL_ERRORS() 25 #undef x 26 NULL 27 }; 28 29 static inline bool journal_seq_unwritten(struct journal *j, u64 seq) 30 { 31 return seq > j->seq_ondisk; 32 } 33 34 static bool __journal_entry_is_open(union journal_res_state state) 35 { 36 return state.cur_entry_offset < JOURNAL_ENTRY_CLOSED_VAL; 37 } 38 39 static inline unsigned nr_unwritten_journal_entries(struct journal *j) 40 { 41 return atomic64_read(&j->seq) - j->seq_ondisk; 42 } 43 44 static bool journal_entry_is_open(struct journal *j) 45 { 46 return __journal_entry_is_open(j->reservations); 47 } 48 49 static inline struct journal_buf * 50 journal_seq_to_buf(struct journal *j, u64 seq) 51 { 52 struct journal_buf *buf = NULL; 53 54 EBUG_ON(seq > journal_cur_seq(j)); 55 56 if (journal_seq_unwritten(j, seq)) { 57 buf = j->buf + (seq & JOURNAL_BUF_MASK); 58 EBUG_ON(le64_to_cpu(buf->data->seq) != seq); 59 } 60 return buf; 61 } 62 63 static void journal_pin_list_init(struct journal_entry_pin_list *p, int count) 64 { 65 unsigned i; 66 67 for (i = 0; i < ARRAY_SIZE(p->list); i++) 68 INIT_LIST_HEAD(&p->list[i]); 69 INIT_LIST_HEAD(&p->flushed); 70 atomic_set(&p->count, count); 71 p->devs.nr = 0; 72 } 73 74 /* 75 * Detect stuck journal conditions and trigger shutdown. Technically the journal 76 * can end up stuck for a variety of reasons, such as a blocked I/O, journal 77 * reservation lockup, etc. Since this is a fatal error with potentially 78 * unpredictable characteristics, we want to be fairly conservative before we 79 * decide to shut things down. 80 * 81 * Consider the journal stuck when it appears full with no ability to commit 82 * btree transactions, to discard journal buckets, nor acquire priority 83 * (reserved watermark) reservation. 84 */ 85 static inline bool 86 journal_error_check_stuck(struct journal *j, int error, unsigned flags) 87 { 88 struct bch_fs *c = container_of(j, struct bch_fs, journal); 89 bool stuck = false; 90 struct printbuf buf = PRINTBUF; 91 92 if (!(error == JOURNAL_ERR_journal_full || 93 error == JOURNAL_ERR_journal_pin_full) || 94 nr_unwritten_journal_entries(j) || 95 (flags & BCH_WATERMARK_MASK) != BCH_WATERMARK_reclaim) 96 return stuck; 97 98 spin_lock(&j->lock); 99 100 if (j->can_discard) { 101 spin_unlock(&j->lock); 102 return stuck; 103 } 104 105 stuck = true; 106 107 /* 108 * The journal shutdown path will set ->err_seq, but do it here first to 109 * serialize against concurrent failures and avoid duplicate error 110 * reports. 111 */ 112 if (j->err_seq) { 113 spin_unlock(&j->lock); 114 return stuck; 115 } 116 j->err_seq = journal_cur_seq(j); 117 spin_unlock(&j->lock); 118 119 bch_err(c, "Journal stuck! Hava a pre-reservation but journal full (error %s)", 120 bch2_journal_errors[error]); 121 bch2_journal_debug_to_text(&buf, j); 122 bch_err(c, "%s", buf.buf); 123 124 printbuf_reset(&buf); 125 bch2_journal_pins_to_text(&buf, j); 126 bch_err(c, "Journal pins:\n%s", buf.buf); 127 printbuf_exit(&buf); 128 129 bch2_fatal_error(c); 130 dump_stack(); 131 132 return stuck; 133 } 134 135 /* 136 * Final processing when the last reference of a journal buffer has been 137 * dropped. Drop the pin list reference acquired at journal entry open and write 138 * the buffer, if requested. 139 */ 140 void bch2_journal_buf_put_final(struct journal *j, u64 seq, bool write) 141 { 142 struct bch_fs *c = container_of(j, struct bch_fs, journal); 143 144 lockdep_assert_held(&j->lock); 145 146 if (__bch2_journal_pin_put(j, seq)) 147 bch2_journal_reclaim_fast(j); 148 if (write) 149 closure_call(&j->io, bch2_journal_write, c->io_complete_wq, NULL); 150 } 151 152 /* 153 * Returns true if journal entry is now closed: 154 * 155 * We don't close a journal_buf until the next journal_buf is finished writing, 156 * and can be opened again - this also initializes the next journal_buf: 157 */ 158 static void __journal_entry_close(struct journal *j, unsigned closed_val) 159 { 160 struct bch_fs *c = container_of(j, struct bch_fs, journal); 161 struct journal_buf *buf = journal_cur_buf(j); 162 union journal_res_state old, new; 163 u64 v = atomic64_read(&j->reservations.counter); 164 unsigned sectors; 165 166 BUG_ON(closed_val != JOURNAL_ENTRY_CLOSED_VAL && 167 closed_val != JOURNAL_ENTRY_ERROR_VAL); 168 169 lockdep_assert_held(&j->lock); 170 171 do { 172 old.v = new.v = v; 173 new.cur_entry_offset = closed_val; 174 175 if (old.cur_entry_offset == JOURNAL_ENTRY_ERROR_VAL || 176 old.cur_entry_offset == new.cur_entry_offset) 177 return; 178 } while ((v = atomic64_cmpxchg(&j->reservations.counter, 179 old.v, new.v)) != old.v); 180 181 if (!__journal_entry_is_open(old)) 182 return; 183 184 /* Close out old buffer: */ 185 buf->data->u64s = cpu_to_le32(old.cur_entry_offset); 186 187 sectors = vstruct_blocks_plus(buf->data, c->block_bits, 188 buf->u64s_reserved) << c->block_bits; 189 BUG_ON(sectors > buf->sectors); 190 buf->sectors = sectors; 191 192 /* 193 * We have to set last_seq here, _before_ opening a new journal entry: 194 * 195 * A threads may replace an old pin with a new pin on their current 196 * journal reservation - the expectation being that the journal will 197 * contain either what the old pin protected or what the new pin 198 * protects. 199 * 200 * After the old pin is dropped journal_last_seq() won't include the old 201 * pin, so we can only write the updated last_seq on the entry that 202 * contains whatever the new pin protects. 203 * 204 * Restated, we can _not_ update last_seq for a given entry if there 205 * could be a newer entry open with reservations/pins that have been 206 * taken against it. 207 * 208 * Hence, we want update/set last_seq on the current journal entry right 209 * before we open a new one: 210 */ 211 buf->last_seq = journal_last_seq(j); 212 buf->data->last_seq = cpu_to_le64(buf->last_seq); 213 BUG_ON(buf->last_seq > le64_to_cpu(buf->data->seq)); 214 215 cancel_delayed_work(&j->write_work); 216 217 bch2_journal_space_available(j); 218 219 __bch2_journal_buf_put(j, old.idx, le64_to_cpu(buf->data->seq)); 220 } 221 222 void bch2_journal_halt(struct journal *j) 223 { 224 spin_lock(&j->lock); 225 __journal_entry_close(j, JOURNAL_ENTRY_ERROR_VAL); 226 if (!j->err_seq) 227 j->err_seq = journal_cur_seq(j); 228 journal_wake(j); 229 spin_unlock(&j->lock); 230 } 231 232 static bool journal_entry_want_write(struct journal *j) 233 { 234 bool ret = !journal_entry_is_open(j) || 235 journal_cur_seq(j) == journal_last_unwritten_seq(j); 236 237 /* Don't close it yet if we already have a write in flight: */ 238 if (ret) 239 __journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL); 240 else if (nr_unwritten_journal_entries(j)) { 241 struct journal_buf *buf = journal_cur_buf(j); 242 243 if (!buf->flush_time) { 244 buf->flush_time = local_clock() ?: 1; 245 buf->expires = jiffies; 246 } 247 } 248 249 return ret; 250 } 251 252 static bool journal_entry_close(struct journal *j) 253 { 254 bool ret; 255 256 spin_lock(&j->lock); 257 ret = journal_entry_want_write(j); 258 spin_unlock(&j->lock); 259 260 return ret; 261 } 262 263 /* 264 * should _only_ called from journal_res_get() - when we actually want a 265 * journal reservation - journal entry is open means journal is dirty: 266 */ 267 static int journal_entry_open(struct journal *j) 268 { 269 struct bch_fs *c = container_of(j, struct bch_fs, journal); 270 struct journal_buf *buf = j->buf + 271 ((journal_cur_seq(j) + 1) & JOURNAL_BUF_MASK); 272 union journal_res_state old, new; 273 int u64s; 274 u64 v; 275 276 lockdep_assert_held(&j->lock); 277 BUG_ON(journal_entry_is_open(j)); 278 BUG_ON(BCH_SB_CLEAN(c->disk_sb.sb)); 279 280 if (j->blocked) 281 return JOURNAL_ERR_blocked; 282 283 if (j->cur_entry_error) 284 return j->cur_entry_error; 285 286 if (bch2_journal_error(j)) 287 return JOURNAL_ERR_insufficient_devices; /* -EROFS */ 288 289 if (!fifo_free(&j->pin)) 290 return JOURNAL_ERR_journal_pin_full; 291 292 if (nr_unwritten_journal_entries(j) == ARRAY_SIZE(j->buf)) 293 return JOURNAL_ERR_max_in_flight; 294 295 BUG_ON(!j->cur_entry_sectors); 296 297 buf->expires = 298 (journal_cur_seq(j) == j->flushed_seq_ondisk 299 ? jiffies 300 : j->last_flush_write) + 301 msecs_to_jiffies(c->opts.journal_flush_delay); 302 303 buf->u64s_reserved = j->entry_u64s_reserved; 304 buf->disk_sectors = j->cur_entry_sectors; 305 buf->sectors = min(buf->disk_sectors, buf->buf_size >> 9); 306 307 u64s = (int) (buf->sectors << 9) / sizeof(u64) - 308 journal_entry_overhead(j); 309 u64s = clamp_t(int, u64s, 0, JOURNAL_ENTRY_CLOSED_VAL - 1); 310 311 if (u64s <= (ssize_t) j->early_journal_entries.nr) 312 return JOURNAL_ERR_journal_full; 313 314 if (fifo_empty(&j->pin) && j->reclaim_thread) 315 wake_up_process(j->reclaim_thread); 316 317 /* 318 * The fifo_push() needs to happen at the same time as j->seq is 319 * incremented for journal_last_seq() to be calculated correctly 320 */ 321 atomic64_inc(&j->seq); 322 journal_pin_list_init(fifo_push_ref(&j->pin), 1); 323 324 BUG_ON(j->buf + (journal_cur_seq(j) & JOURNAL_BUF_MASK) != buf); 325 326 bkey_extent_init(&buf->key); 327 buf->noflush = false; 328 buf->must_flush = false; 329 buf->separate_flush = false; 330 buf->flush_time = 0; 331 332 memset(buf->data, 0, sizeof(*buf->data)); 333 buf->data->seq = cpu_to_le64(journal_cur_seq(j)); 334 buf->data->u64s = 0; 335 336 if (j->early_journal_entries.nr) { 337 memcpy(buf->data->_data, j->early_journal_entries.data, 338 j->early_journal_entries.nr * sizeof(u64)); 339 le32_add_cpu(&buf->data->u64s, j->early_journal_entries.nr); 340 } 341 342 /* 343 * Must be set before marking the journal entry as open: 344 */ 345 j->cur_entry_u64s = u64s; 346 347 v = atomic64_read(&j->reservations.counter); 348 do { 349 old.v = new.v = v; 350 351 BUG_ON(old.cur_entry_offset == JOURNAL_ENTRY_ERROR_VAL); 352 353 new.idx++; 354 BUG_ON(journal_state_count(new, new.idx)); 355 BUG_ON(new.idx != (journal_cur_seq(j) & JOURNAL_BUF_MASK)); 356 357 journal_state_inc(&new); 358 359 /* Handle any already added entries */ 360 new.cur_entry_offset = le32_to_cpu(buf->data->u64s); 361 } while ((v = atomic64_cmpxchg(&j->reservations.counter, 362 old.v, new.v)) != old.v); 363 364 if (j->res_get_blocked_start) 365 bch2_time_stats_update(j->blocked_time, 366 j->res_get_blocked_start); 367 j->res_get_blocked_start = 0; 368 369 mod_delayed_work(c->io_complete_wq, 370 &j->write_work, 371 msecs_to_jiffies(c->opts.journal_flush_delay)); 372 journal_wake(j); 373 374 if (j->early_journal_entries.nr) 375 darray_exit(&j->early_journal_entries); 376 return 0; 377 } 378 379 static bool journal_quiesced(struct journal *j) 380 { 381 bool ret = atomic64_read(&j->seq) == j->seq_ondisk; 382 383 if (!ret) 384 journal_entry_close(j); 385 return ret; 386 } 387 388 static void journal_quiesce(struct journal *j) 389 { 390 wait_event(j->wait, journal_quiesced(j)); 391 } 392 393 static void journal_write_work(struct work_struct *work) 394 { 395 struct journal *j = container_of(work, struct journal, write_work.work); 396 struct bch_fs *c = container_of(j, struct bch_fs, journal); 397 long delta; 398 399 spin_lock(&j->lock); 400 if (!__journal_entry_is_open(j->reservations)) 401 goto unlock; 402 403 delta = journal_cur_buf(j)->expires - jiffies; 404 405 if (delta > 0) 406 mod_delayed_work(c->io_complete_wq, &j->write_work, delta); 407 else 408 __journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL); 409 unlock: 410 spin_unlock(&j->lock); 411 } 412 413 static int __journal_res_get(struct journal *j, struct journal_res *res, 414 unsigned flags) 415 { 416 struct bch_fs *c = container_of(j, struct bch_fs, journal); 417 struct journal_buf *buf; 418 bool can_discard; 419 int ret; 420 retry: 421 if (journal_res_get_fast(j, res, flags)) 422 return 0; 423 424 if (bch2_journal_error(j)) 425 return -BCH_ERR_erofs_journal_err; 426 427 spin_lock(&j->lock); 428 429 /* check once more in case somebody else shut things down... */ 430 if (bch2_journal_error(j)) { 431 spin_unlock(&j->lock); 432 return -BCH_ERR_erofs_journal_err; 433 } 434 435 /* 436 * Recheck after taking the lock, so we don't race with another thread 437 * that just did journal_entry_open() and call journal_entry_close() 438 * unnecessarily 439 */ 440 if (journal_res_get_fast(j, res, flags)) { 441 spin_unlock(&j->lock); 442 return 0; 443 } 444 445 if ((flags & BCH_WATERMARK_MASK) < j->watermark) { 446 /* 447 * Don't want to close current journal entry, just need to 448 * invoke reclaim: 449 */ 450 ret = JOURNAL_ERR_journal_full; 451 goto unlock; 452 } 453 454 /* 455 * If we couldn't get a reservation because the current buf filled up, 456 * and we had room for a bigger entry on disk, signal that we want to 457 * realloc the journal bufs: 458 */ 459 buf = journal_cur_buf(j); 460 if (journal_entry_is_open(j) && 461 buf->buf_size >> 9 < buf->disk_sectors && 462 buf->buf_size < JOURNAL_ENTRY_SIZE_MAX) 463 j->buf_size_want = max(j->buf_size_want, buf->buf_size << 1); 464 465 __journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL); 466 ret = journal_entry_open(j); 467 468 if (ret == JOURNAL_ERR_max_in_flight) 469 trace_and_count(c, journal_entry_full, c); 470 unlock: 471 if ((ret && ret != JOURNAL_ERR_insufficient_devices) && 472 !j->res_get_blocked_start) { 473 j->res_get_blocked_start = local_clock() ?: 1; 474 trace_and_count(c, journal_full, c); 475 } 476 477 can_discard = j->can_discard; 478 spin_unlock(&j->lock); 479 480 if (!ret) 481 goto retry; 482 if (journal_error_check_stuck(j, ret, flags)) 483 ret = -BCH_ERR_journal_res_get_blocked; 484 485 /* 486 * Journal is full - can't rely on reclaim from work item due to 487 * freezing: 488 */ 489 if ((ret == JOURNAL_ERR_journal_full || 490 ret == JOURNAL_ERR_journal_pin_full) && 491 !(flags & JOURNAL_RES_GET_NONBLOCK)) { 492 if (can_discard) { 493 bch2_journal_do_discards(j); 494 goto retry; 495 } 496 497 if (mutex_trylock(&j->reclaim_lock)) { 498 bch2_journal_reclaim(j); 499 mutex_unlock(&j->reclaim_lock); 500 } 501 } 502 503 return ret == JOURNAL_ERR_insufficient_devices 504 ? -BCH_ERR_erofs_journal_err 505 : -BCH_ERR_journal_res_get_blocked; 506 } 507 508 /* 509 * Essentially the entry function to the journaling code. When bcachefs is doing 510 * a btree insert, it calls this function to get the current journal write. 511 * Journal write is the structure used set up journal writes. The calling 512 * function will then add its keys to the structure, queuing them for the next 513 * write. 514 * 515 * To ensure forward progress, the current task must not be holding any 516 * btree node write locks. 517 */ 518 int bch2_journal_res_get_slowpath(struct journal *j, struct journal_res *res, 519 unsigned flags) 520 { 521 int ret; 522 523 closure_wait_event(&j->async_wait, 524 (ret = __journal_res_get(j, res, flags)) != -BCH_ERR_journal_res_get_blocked || 525 (flags & JOURNAL_RES_GET_NONBLOCK)); 526 return ret; 527 } 528 529 /* journal_preres: */ 530 531 static bool journal_preres_available(struct journal *j, 532 struct journal_preres *res, 533 unsigned new_u64s, 534 unsigned flags) 535 { 536 bool ret = bch2_journal_preres_get_fast(j, res, new_u64s, flags, true); 537 538 if (!ret && mutex_trylock(&j->reclaim_lock)) { 539 bch2_journal_reclaim(j); 540 mutex_unlock(&j->reclaim_lock); 541 } 542 543 return ret; 544 } 545 546 int __bch2_journal_preres_get(struct journal *j, 547 struct journal_preres *res, 548 unsigned new_u64s, 549 unsigned flags) 550 { 551 int ret; 552 553 closure_wait_event(&j->preres_wait, 554 (ret = bch2_journal_error(j)) || 555 journal_preres_available(j, res, new_u64s, flags)); 556 return ret; 557 } 558 559 /* journal_entry_res: */ 560 561 void bch2_journal_entry_res_resize(struct journal *j, 562 struct journal_entry_res *res, 563 unsigned new_u64s) 564 { 565 union journal_res_state state; 566 int d = new_u64s - res->u64s; 567 568 spin_lock(&j->lock); 569 570 j->entry_u64s_reserved += d; 571 if (d <= 0) 572 goto out; 573 574 j->cur_entry_u64s = max_t(int, 0, j->cur_entry_u64s - d); 575 smp_mb(); 576 state = READ_ONCE(j->reservations); 577 578 if (state.cur_entry_offset < JOURNAL_ENTRY_CLOSED_VAL && 579 state.cur_entry_offset > j->cur_entry_u64s) { 580 j->cur_entry_u64s += d; 581 /* 582 * Not enough room in current journal entry, have to flush it: 583 */ 584 __journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL); 585 } else { 586 journal_cur_buf(j)->u64s_reserved += d; 587 } 588 out: 589 spin_unlock(&j->lock); 590 res->u64s += d; 591 } 592 593 /* journal flushing: */ 594 595 /** 596 * bch2_journal_flush_seq_async - wait for a journal entry to be written 597 * @j: journal object 598 * @seq: seq to flush 599 * @parent: closure object to wait with 600 * Returns: 1 if @seq has already been flushed, 0 if @seq is being flushed, 601 * -EIO if @seq will never be flushed 602 * 603 * Like bch2_journal_wait_on_seq, except that it triggers a write immediately if 604 * necessary 605 */ 606 int bch2_journal_flush_seq_async(struct journal *j, u64 seq, 607 struct closure *parent) 608 { 609 struct journal_buf *buf; 610 int ret = 0; 611 612 if (seq <= j->flushed_seq_ondisk) 613 return 1; 614 615 spin_lock(&j->lock); 616 617 if (WARN_ONCE(seq > journal_cur_seq(j), 618 "requested to flush journal seq %llu, but currently at %llu", 619 seq, journal_cur_seq(j))) 620 goto out; 621 622 /* Recheck under lock: */ 623 if (j->err_seq && seq >= j->err_seq) { 624 ret = -EIO; 625 goto out; 626 } 627 628 if (seq <= j->flushed_seq_ondisk) { 629 ret = 1; 630 goto out; 631 } 632 633 /* if seq was written, but not flushed - flush a newer one instead */ 634 seq = max(seq, journal_last_unwritten_seq(j)); 635 636 recheck_need_open: 637 if (seq > journal_cur_seq(j)) { 638 struct journal_res res = { 0 }; 639 640 if (journal_entry_is_open(j)) 641 __journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL); 642 643 spin_unlock(&j->lock); 644 645 ret = bch2_journal_res_get(j, &res, jset_u64s(0), 0); 646 if (ret) 647 return ret; 648 649 seq = res.seq; 650 buf = j->buf + (seq & JOURNAL_BUF_MASK); 651 buf->must_flush = true; 652 653 if (!buf->flush_time) { 654 buf->flush_time = local_clock() ?: 1; 655 buf->expires = jiffies; 656 } 657 658 if (parent && !closure_wait(&buf->wait, parent)) 659 BUG(); 660 661 bch2_journal_res_put(j, &res); 662 663 spin_lock(&j->lock); 664 goto want_write; 665 } 666 667 /* 668 * if write was kicked off without a flush, flush the next sequence 669 * number instead 670 */ 671 buf = journal_seq_to_buf(j, seq); 672 if (buf->noflush) { 673 seq++; 674 goto recheck_need_open; 675 } 676 677 buf->must_flush = true; 678 679 if (parent && !closure_wait(&buf->wait, parent)) 680 BUG(); 681 want_write: 682 if (seq == journal_cur_seq(j)) 683 journal_entry_want_write(j); 684 out: 685 spin_unlock(&j->lock); 686 return ret; 687 } 688 689 int bch2_journal_flush_seq(struct journal *j, u64 seq) 690 { 691 u64 start_time = local_clock(); 692 int ret, ret2; 693 694 /* 695 * Don't update time_stats when @seq is already flushed: 696 */ 697 if (seq <= j->flushed_seq_ondisk) 698 return 0; 699 700 ret = wait_event_interruptible(j->wait, (ret2 = bch2_journal_flush_seq_async(j, seq, NULL))); 701 702 if (!ret) 703 bch2_time_stats_update(j->flush_seq_time, start_time); 704 705 return ret ?: ret2 < 0 ? ret2 : 0; 706 } 707 708 /* 709 * bch2_journal_flush_async - if there is an open journal entry, or a journal 710 * still being written, write it and wait for the write to complete 711 */ 712 void bch2_journal_flush_async(struct journal *j, struct closure *parent) 713 { 714 bch2_journal_flush_seq_async(j, atomic64_read(&j->seq), parent); 715 } 716 717 int bch2_journal_flush(struct journal *j) 718 { 719 return bch2_journal_flush_seq(j, atomic64_read(&j->seq)); 720 } 721 722 /* 723 * bch2_journal_noflush_seq - tell the journal not to issue any flushes before 724 * @seq 725 */ 726 bool bch2_journal_noflush_seq(struct journal *j, u64 seq) 727 { 728 struct bch_fs *c = container_of(j, struct bch_fs, journal); 729 u64 unwritten_seq; 730 bool ret = false; 731 732 if (!(c->sb.features & (1ULL << BCH_FEATURE_journal_no_flush))) 733 return false; 734 735 if (seq <= c->journal.flushed_seq_ondisk) 736 return false; 737 738 spin_lock(&j->lock); 739 if (seq <= c->journal.flushed_seq_ondisk) 740 goto out; 741 742 for (unwritten_seq = journal_last_unwritten_seq(j); 743 unwritten_seq < seq; 744 unwritten_seq++) { 745 struct journal_buf *buf = journal_seq_to_buf(j, unwritten_seq); 746 747 /* journal write is already in flight, and was a flush write: */ 748 if (unwritten_seq == journal_last_unwritten_seq(j) && !buf->noflush) 749 goto out; 750 751 buf->noflush = true; 752 } 753 754 ret = true; 755 out: 756 spin_unlock(&j->lock); 757 return ret; 758 } 759 760 int bch2_journal_meta(struct journal *j) 761 { 762 struct journal_buf *buf; 763 struct journal_res res; 764 int ret; 765 766 memset(&res, 0, sizeof(res)); 767 768 ret = bch2_journal_res_get(j, &res, jset_u64s(0), 0); 769 if (ret) 770 return ret; 771 772 buf = j->buf + (res.seq & JOURNAL_BUF_MASK); 773 buf->must_flush = true; 774 775 if (!buf->flush_time) { 776 buf->flush_time = local_clock() ?: 1; 777 buf->expires = jiffies; 778 } 779 780 bch2_journal_res_put(j, &res); 781 782 return bch2_journal_flush_seq(j, res.seq); 783 } 784 785 /* block/unlock the journal: */ 786 787 void bch2_journal_unblock(struct journal *j) 788 { 789 spin_lock(&j->lock); 790 j->blocked--; 791 spin_unlock(&j->lock); 792 793 journal_wake(j); 794 } 795 796 void bch2_journal_block(struct journal *j) 797 { 798 spin_lock(&j->lock); 799 j->blocked++; 800 spin_unlock(&j->lock); 801 802 journal_quiesce(j); 803 } 804 805 /* allocate journal on a device: */ 806 807 static int __bch2_set_nr_journal_buckets(struct bch_dev *ca, unsigned nr, 808 bool new_fs, struct closure *cl) 809 { 810 struct bch_fs *c = ca->fs; 811 struct journal_device *ja = &ca->journal; 812 u64 *new_bucket_seq = NULL, *new_buckets = NULL; 813 struct open_bucket **ob = NULL; 814 long *bu = NULL; 815 unsigned i, pos, nr_got = 0, nr_want = nr - ja->nr; 816 int ret = 0; 817 818 BUG_ON(nr <= ja->nr); 819 820 bu = kcalloc(nr_want, sizeof(*bu), GFP_KERNEL); 821 ob = kcalloc(nr_want, sizeof(*ob), GFP_KERNEL); 822 new_buckets = kcalloc(nr, sizeof(u64), GFP_KERNEL); 823 new_bucket_seq = kcalloc(nr, sizeof(u64), GFP_KERNEL); 824 if (!bu || !ob || !new_buckets || !new_bucket_seq) { 825 ret = -BCH_ERR_ENOMEM_set_nr_journal_buckets; 826 goto err_free; 827 } 828 829 for (nr_got = 0; nr_got < nr_want; nr_got++) { 830 if (new_fs) { 831 bu[nr_got] = bch2_bucket_alloc_new_fs(ca); 832 if (bu[nr_got] < 0) { 833 ret = -BCH_ERR_ENOSPC_bucket_alloc; 834 break; 835 } 836 } else { 837 ob[nr_got] = bch2_bucket_alloc(c, ca, BCH_WATERMARK_normal, cl); 838 ret = PTR_ERR_OR_ZERO(ob[nr_got]); 839 if (ret) 840 break; 841 842 ret = bch2_trans_run(c, 843 bch2_trans_mark_metadata_bucket(trans, ca, 844 ob[nr_got]->bucket, BCH_DATA_journal, 845 ca->mi.bucket_size)); 846 if (ret) { 847 bch2_open_bucket_put(c, ob[nr_got]); 848 bch_err_msg(c, ret, "marking new journal buckets"); 849 break; 850 } 851 852 bu[nr_got] = ob[nr_got]->bucket; 853 } 854 } 855 856 if (!nr_got) 857 goto err_free; 858 859 /* Don't return an error if we successfully allocated some buckets: */ 860 ret = 0; 861 862 if (c) { 863 bch2_journal_flush_all_pins(&c->journal); 864 bch2_journal_block(&c->journal); 865 mutex_lock(&c->sb_lock); 866 } 867 868 memcpy(new_buckets, ja->buckets, ja->nr * sizeof(u64)); 869 memcpy(new_bucket_seq, ja->bucket_seq, ja->nr * sizeof(u64)); 870 871 BUG_ON(ja->discard_idx > ja->nr); 872 873 pos = ja->discard_idx ?: ja->nr; 874 875 memmove(new_buckets + pos + nr_got, 876 new_buckets + pos, 877 sizeof(new_buckets[0]) * (ja->nr - pos)); 878 memmove(new_bucket_seq + pos + nr_got, 879 new_bucket_seq + pos, 880 sizeof(new_bucket_seq[0]) * (ja->nr - pos)); 881 882 for (i = 0; i < nr_got; i++) { 883 new_buckets[pos + i] = bu[i]; 884 new_bucket_seq[pos + i] = 0; 885 } 886 887 nr = ja->nr + nr_got; 888 889 ret = bch2_journal_buckets_to_sb(c, ca, new_buckets, nr); 890 if (ret) 891 goto err_unblock; 892 893 if (!new_fs) 894 bch2_write_super(c); 895 896 /* Commit: */ 897 if (c) 898 spin_lock(&c->journal.lock); 899 900 swap(new_buckets, ja->buckets); 901 swap(new_bucket_seq, ja->bucket_seq); 902 ja->nr = nr; 903 904 if (pos <= ja->discard_idx) 905 ja->discard_idx = (ja->discard_idx + nr_got) % ja->nr; 906 if (pos <= ja->dirty_idx_ondisk) 907 ja->dirty_idx_ondisk = (ja->dirty_idx_ondisk + nr_got) % ja->nr; 908 if (pos <= ja->dirty_idx) 909 ja->dirty_idx = (ja->dirty_idx + nr_got) % ja->nr; 910 if (pos <= ja->cur_idx) 911 ja->cur_idx = (ja->cur_idx + nr_got) % ja->nr; 912 913 if (c) 914 spin_unlock(&c->journal.lock); 915 err_unblock: 916 if (c) { 917 bch2_journal_unblock(&c->journal); 918 mutex_unlock(&c->sb_lock); 919 } 920 921 if (ret && !new_fs) 922 for (i = 0; i < nr_got; i++) 923 bch2_trans_run(c, 924 bch2_trans_mark_metadata_bucket(trans, ca, 925 bu[i], BCH_DATA_free, 0)); 926 err_free: 927 if (!new_fs) 928 for (i = 0; i < nr_got; i++) 929 bch2_open_bucket_put(c, ob[i]); 930 931 kfree(new_bucket_seq); 932 kfree(new_buckets); 933 kfree(ob); 934 kfree(bu); 935 return ret; 936 } 937 938 /* 939 * Allocate more journal space at runtime - not currently making use if it, but 940 * the code works: 941 */ 942 int bch2_set_nr_journal_buckets(struct bch_fs *c, struct bch_dev *ca, 943 unsigned nr) 944 { 945 struct journal_device *ja = &ca->journal; 946 struct closure cl; 947 int ret = 0; 948 949 closure_init_stack(&cl); 950 951 down_write(&c->state_lock); 952 953 /* don't handle reducing nr of buckets yet: */ 954 if (nr < ja->nr) 955 goto unlock; 956 957 while (ja->nr < nr) { 958 struct disk_reservation disk_res = { 0, 0, 0 }; 959 960 /* 961 * note: journal buckets aren't really counted as _sectors_ used yet, so 962 * we don't need the disk reservation to avoid the BUG_ON() in buckets.c 963 * when space used goes up without a reservation - but we do need the 964 * reservation to ensure we'll actually be able to allocate: 965 * 966 * XXX: that's not right, disk reservations only ensure a 967 * filesystem-wide allocation will succeed, this is a device 968 * specific allocation - we can hang here: 969 */ 970 971 ret = bch2_disk_reservation_get(c, &disk_res, 972 bucket_to_sector(ca, nr - ja->nr), 1, 0); 973 if (ret) 974 break; 975 976 ret = __bch2_set_nr_journal_buckets(ca, nr, false, &cl); 977 978 bch2_disk_reservation_put(c, &disk_res); 979 980 closure_sync(&cl); 981 982 if (ret && ret != -BCH_ERR_bucket_alloc_blocked) 983 break; 984 } 985 986 if (ret) 987 bch_err_fn(c, ret); 988 unlock: 989 up_write(&c->state_lock); 990 return ret; 991 } 992 993 int bch2_dev_journal_alloc(struct bch_dev *ca) 994 { 995 unsigned nr; 996 int ret; 997 998 if (dynamic_fault("bcachefs:add:journal_alloc")) { 999 ret = -BCH_ERR_ENOMEM_set_nr_journal_buckets; 1000 goto err; 1001 } 1002 1003 /* 1/128th of the device by default: */ 1004 nr = ca->mi.nbuckets >> 7; 1005 1006 /* 1007 * clamp journal size to 8192 buckets or 8GB (in sectors), whichever 1008 * is smaller: 1009 */ 1010 nr = clamp_t(unsigned, nr, 1011 BCH_JOURNAL_BUCKETS_MIN, 1012 min(1 << 13, 1013 (1 << 24) / ca->mi.bucket_size)); 1014 1015 ret = __bch2_set_nr_journal_buckets(ca, nr, true, NULL); 1016 err: 1017 if (ret) 1018 bch_err_fn(ca, ret); 1019 return ret; 1020 } 1021 1022 /* startup/shutdown: */ 1023 1024 static bool bch2_journal_writing_to_device(struct journal *j, unsigned dev_idx) 1025 { 1026 bool ret = false; 1027 u64 seq; 1028 1029 spin_lock(&j->lock); 1030 for (seq = journal_last_unwritten_seq(j); 1031 seq <= journal_cur_seq(j) && !ret; 1032 seq++) { 1033 struct journal_buf *buf = journal_seq_to_buf(j, seq); 1034 1035 if (bch2_bkey_has_device_c(bkey_i_to_s_c(&buf->key), dev_idx)) 1036 ret = true; 1037 } 1038 spin_unlock(&j->lock); 1039 1040 return ret; 1041 } 1042 1043 void bch2_dev_journal_stop(struct journal *j, struct bch_dev *ca) 1044 { 1045 wait_event(j->wait, !bch2_journal_writing_to_device(j, ca->dev_idx)); 1046 } 1047 1048 void bch2_fs_journal_stop(struct journal *j) 1049 { 1050 bch2_journal_reclaim_stop(j); 1051 bch2_journal_flush_all_pins(j); 1052 1053 wait_event(j->wait, journal_entry_close(j)); 1054 1055 /* 1056 * Always write a new journal entry, to make sure the clock hands are up 1057 * to date (and match the superblock) 1058 */ 1059 bch2_journal_meta(j); 1060 1061 journal_quiesce(j); 1062 1063 BUG_ON(!bch2_journal_error(j) && 1064 test_bit(JOURNAL_REPLAY_DONE, &j->flags) && 1065 j->last_empty_seq != journal_cur_seq(j)); 1066 1067 cancel_delayed_work_sync(&j->write_work); 1068 } 1069 1070 int bch2_fs_journal_start(struct journal *j, u64 cur_seq) 1071 { 1072 struct bch_fs *c = container_of(j, struct bch_fs, journal); 1073 struct journal_entry_pin_list *p; 1074 struct journal_replay *i, **_i; 1075 struct genradix_iter iter; 1076 bool had_entries = false; 1077 unsigned ptr; 1078 u64 last_seq = cur_seq, nr, seq; 1079 1080 genradix_for_each_reverse(&c->journal_entries, iter, _i) { 1081 i = *_i; 1082 1083 if (!i || i->ignore) 1084 continue; 1085 1086 last_seq = le64_to_cpu(i->j.last_seq); 1087 break; 1088 } 1089 1090 nr = cur_seq - last_seq; 1091 1092 if (nr + 1 > j->pin.size) { 1093 free_fifo(&j->pin); 1094 init_fifo(&j->pin, roundup_pow_of_two(nr + 1), GFP_KERNEL); 1095 if (!j->pin.data) { 1096 bch_err(c, "error reallocating journal fifo (%llu open entries)", nr); 1097 return -BCH_ERR_ENOMEM_journal_pin_fifo; 1098 } 1099 } 1100 1101 j->replay_journal_seq = last_seq; 1102 j->replay_journal_seq_end = cur_seq; 1103 j->last_seq_ondisk = last_seq; 1104 j->flushed_seq_ondisk = cur_seq - 1; 1105 j->seq_ondisk = cur_seq - 1; 1106 j->pin.front = last_seq; 1107 j->pin.back = cur_seq; 1108 atomic64_set(&j->seq, cur_seq - 1); 1109 1110 fifo_for_each_entry_ptr(p, &j->pin, seq) 1111 journal_pin_list_init(p, 1); 1112 1113 genradix_for_each(&c->journal_entries, iter, _i) { 1114 i = *_i; 1115 1116 if (!i || i->ignore) 1117 continue; 1118 1119 seq = le64_to_cpu(i->j.seq); 1120 BUG_ON(seq >= cur_seq); 1121 1122 if (seq < last_seq) 1123 continue; 1124 1125 if (journal_entry_empty(&i->j)) 1126 j->last_empty_seq = le64_to_cpu(i->j.seq); 1127 1128 p = journal_seq_pin(j, seq); 1129 1130 p->devs.nr = 0; 1131 for (ptr = 0; ptr < i->nr_ptrs; ptr++) 1132 bch2_dev_list_add_dev(&p->devs, i->ptrs[ptr].dev); 1133 1134 had_entries = true; 1135 } 1136 1137 if (!had_entries) 1138 j->last_empty_seq = cur_seq; 1139 1140 spin_lock(&j->lock); 1141 1142 set_bit(JOURNAL_STARTED, &j->flags); 1143 j->last_flush_write = jiffies; 1144 1145 j->reservations.idx = j->reservations.unwritten_idx = journal_cur_seq(j); 1146 j->reservations.unwritten_idx++; 1147 1148 c->last_bucket_seq_cleanup = journal_cur_seq(j); 1149 1150 bch2_journal_space_available(j); 1151 spin_unlock(&j->lock); 1152 1153 return bch2_journal_reclaim_start(j); 1154 } 1155 1156 /* init/exit: */ 1157 1158 void bch2_dev_journal_exit(struct bch_dev *ca) 1159 { 1160 kfree(ca->journal.bio); 1161 kfree(ca->journal.buckets); 1162 kfree(ca->journal.bucket_seq); 1163 1164 ca->journal.bio = NULL; 1165 ca->journal.buckets = NULL; 1166 ca->journal.bucket_seq = NULL; 1167 } 1168 1169 int bch2_dev_journal_init(struct bch_dev *ca, struct bch_sb *sb) 1170 { 1171 struct journal_device *ja = &ca->journal; 1172 struct bch_sb_field_journal *journal_buckets = 1173 bch2_sb_field_get(sb, journal); 1174 struct bch_sb_field_journal_v2 *journal_buckets_v2 = 1175 bch2_sb_field_get(sb, journal_v2); 1176 unsigned i, nr_bvecs; 1177 1178 ja->nr = 0; 1179 1180 if (journal_buckets_v2) { 1181 unsigned nr = bch2_sb_field_journal_v2_nr_entries(journal_buckets_v2); 1182 1183 for (i = 0; i < nr; i++) 1184 ja->nr += le64_to_cpu(journal_buckets_v2->d[i].nr); 1185 } else if (journal_buckets) { 1186 ja->nr = bch2_nr_journal_buckets(journal_buckets); 1187 } 1188 1189 ja->bucket_seq = kcalloc(ja->nr, sizeof(u64), GFP_KERNEL); 1190 if (!ja->bucket_seq) 1191 return -BCH_ERR_ENOMEM_dev_journal_init; 1192 1193 nr_bvecs = DIV_ROUND_UP(JOURNAL_ENTRY_SIZE_MAX, PAGE_SIZE); 1194 1195 ca->journal.bio = bio_kmalloc(nr_bvecs, GFP_KERNEL); 1196 if (!ca->journal.bio) 1197 return -BCH_ERR_ENOMEM_dev_journal_init; 1198 1199 bio_init(ca->journal.bio, NULL, ca->journal.bio->bi_inline_vecs, nr_bvecs, 0); 1200 1201 ja->buckets = kcalloc(ja->nr, sizeof(u64), GFP_KERNEL); 1202 if (!ja->buckets) 1203 return -BCH_ERR_ENOMEM_dev_journal_init; 1204 1205 if (journal_buckets_v2) { 1206 unsigned nr = bch2_sb_field_journal_v2_nr_entries(journal_buckets_v2); 1207 unsigned j, dst = 0; 1208 1209 for (i = 0; i < nr; i++) 1210 for (j = 0; j < le64_to_cpu(journal_buckets_v2->d[i].nr); j++) 1211 ja->buckets[dst++] = 1212 le64_to_cpu(journal_buckets_v2->d[i].start) + j; 1213 } else if (journal_buckets) { 1214 for (i = 0; i < ja->nr; i++) 1215 ja->buckets[i] = le64_to_cpu(journal_buckets->buckets[i]); 1216 } 1217 1218 return 0; 1219 } 1220 1221 void bch2_fs_journal_exit(struct journal *j) 1222 { 1223 unsigned i; 1224 1225 darray_exit(&j->early_journal_entries); 1226 1227 for (i = 0; i < ARRAY_SIZE(j->buf); i++) 1228 kvpfree(j->buf[i].data, j->buf[i].buf_size); 1229 free_fifo(&j->pin); 1230 } 1231 1232 int bch2_fs_journal_init(struct journal *j) 1233 { 1234 static struct lock_class_key res_key; 1235 unsigned i; 1236 1237 spin_lock_init(&j->lock); 1238 spin_lock_init(&j->err_lock); 1239 init_waitqueue_head(&j->wait); 1240 INIT_DELAYED_WORK(&j->write_work, journal_write_work); 1241 init_waitqueue_head(&j->reclaim_wait); 1242 init_waitqueue_head(&j->pin_flush_wait); 1243 mutex_init(&j->reclaim_lock); 1244 mutex_init(&j->discard_lock); 1245 1246 lockdep_init_map(&j->res_map, "journal res", &res_key, 0); 1247 1248 atomic64_set(&j->reservations.counter, 1249 ((union journal_res_state) 1250 { .cur_entry_offset = JOURNAL_ENTRY_CLOSED_VAL }).v); 1251 1252 if (!(init_fifo(&j->pin, JOURNAL_PIN, GFP_KERNEL))) 1253 return -BCH_ERR_ENOMEM_journal_pin_fifo; 1254 1255 for (i = 0; i < ARRAY_SIZE(j->buf); i++) { 1256 j->buf[i].buf_size = JOURNAL_ENTRY_SIZE_MIN; 1257 j->buf[i].data = kvpmalloc(j->buf[i].buf_size, GFP_KERNEL); 1258 if (!j->buf[i].data) 1259 return -BCH_ERR_ENOMEM_journal_buf; 1260 } 1261 1262 j->pin.front = j->pin.back = 1; 1263 return 0; 1264 } 1265 1266 /* debug: */ 1267 1268 void __bch2_journal_debug_to_text(struct printbuf *out, struct journal *j) 1269 { 1270 struct bch_fs *c = container_of(j, struct bch_fs, journal); 1271 union journal_res_state s; 1272 struct bch_dev *ca; 1273 unsigned long now = jiffies; 1274 u64 seq; 1275 unsigned i; 1276 1277 if (!out->nr_tabstops) 1278 printbuf_tabstop_push(out, 24); 1279 out->atomic++; 1280 1281 rcu_read_lock(); 1282 s = READ_ONCE(j->reservations); 1283 1284 prt_printf(out, "dirty journal entries:\t%llu/%llu\n", fifo_used(&j->pin), j->pin.size); 1285 prt_printf(out, "seq:\t\t\t%llu\n", journal_cur_seq(j)); 1286 prt_printf(out, "seq_ondisk:\t\t%llu\n", j->seq_ondisk); 1287 prt_printf(out, "last_seq:\t\t%llu\n", journal_last_seq(j)); 1288 prt_printf(out, "last_seq_ondisk:\t%llu\n", j->last_seq_ondisk); 1289 prt_printf(out, "flushed_seq_ondisk:\t%llu\n", j->flushed_seq_ondisk); 1290 prt_printf(out, "prereserved:\t\t%u/%u\n", j->prereserved.reserved, j->prereserved.remaining); 1291 prt_printf(out, "watermark:\t\t%s\n", bch2_watermarks[j->watermark]); 1292 prt_printf(out, "each entry reserved:\t%u\n", j->entry_u64s_reserved); 1293 prt_printf(out, "nr flush writes:\t%llu\n", j->nr_flush_writes); 1294 prt_printf(out, "nr noflush writes:\t%llu\n", j->nr_noflush_writes); 1295 prt_printf(out, "nr direct reclaim:\t%llu\n", j->nr_direct_reclaim); 1296 prt_printf(out, "nr background reclaim:\t%llu\n", j->nr_background_reclaim); 1297 prt_printf(out, "reclaim kicked:\t\t%u\n", j->reclaim_kicked); 1298 prt_printf(out, "reclaim runs in:\t%u ms\n", time_after(j->next_reclaim, now) 1299 ? jiffies_to_msecs(j->next_reclaim - jiffies) : 0); 1300 prt_printf(out, "current entry sectors:\t%u\n", j->cur_entry_sectors); 1301 prt_printf(out, "current entry error:\t%s\n", bch2_journal_errors[j->cur_entry_error]); 1302 prt_printf(out, "current entry:\t\t"); 1303 1304 switch (s.cur_entry_offset) { 1305 case JOURNAL_ENTRY_ERROR_VAL: 1306 prt_printf(out, "error"); 1307 break; 1308 case JOURNAL_ENTRY_CLOSED_VAL: 1309 prt_printf(out, "closed"); 1310 break; 1311 default: 1312 prt_printf(out, "%u/%u", s.cur_entry_offset, j->cur_entry_u64s); 1313 break; 1314 } 1315 1316 prt_newline(out); 1317 1318 for (seq = journal_cur_seq(j); 1319 seq >= journal_last_unwritten_seq(j); 1320 --seq) { 1321 i = seq & JOURNAL_BUF_MASK; 1322 1323 prt_printf(out, "unwritten entry:"); 1324 prt_tab(out); 1325 prt_printf(out, "%llu", seq); 1326 prt_newline(out); 1327 printbuf_indent_add(out, 2); 1328 1329 prt_printf(out, "refcount:"); 1330 prt_tab(out); 1331 prt_printf(out, "%u", journal_state_count(s, i)); 1332 prt_newline(out); 1333 1334 prt_printf(out, "sectors:"); 1335 prt_tab(out); 1336 prt_printf(out, "%u", j->buf[i].sectors); 1337 prt_newline(out); 1338 1339 prt_printf(out, "expires"); 1340 prt_tab(out); 1341 prt_printf(out, "%li jiffies", j->buf[i].expires - jiffies); 1342 prt_newline(out); 1343 1344 printbuf_indent_sub(out, 2); 1345 } 1346 1347 prt_printf(out, 1348 "replay done:\t\t%i\n", 1349 test_bit(JOURNAL_REPLAY_DONE, &j->flags)); 1350 1351 prt_printf(out, "space:\n"); 1352 prt_printf(out, "\tdiscarded\t%u:%u\n", 1353 j->space[journal_space_discarded].next_entry, 1354 j->space[journal_space_discarded].total); 1355 prt_printf(out, "\tclean ondisk\t%u:%u\n", 1356 j->space[journal_space_clean_ondisk].next_entry, 1357 j->space[journal_space_clean_ondisk].total); 1358 prt_printf(out, "\tclean\t\t%u:%u\n", 1359 j->space[journal_space_clean].next_entry, 1360 j->space[journal_space_clean].total); 1361 prt_printf(out, "\ttotal\t\t%u:%u\n", 1362 j->space[journal_space_total].next_entry, 1363 j->space[journal_space_total].total); 1364 1365 for_each_member_device_rcu(ca, c, i, 1366 &c->rw_devs[BCH_DATA_journal]) { 1367 struct journal_device *ja = &ca->journal; 1368 1369 if (!test_bit(ca->dev_idx, c->rw_devs[BCH_DATA_journal].d)) 1370 continue; 1371 1372 if (!ja->nr) 1373 continue; 1374 1375 prt_printf(out, "dev %u:\n", i); 1376 prt_printf(out, "\tnr\t\t%u\n", ja->nr); 1377 prt_printf(out, "\tbucket size\t%u\n", ca->mi.bucket_size); 1378 prt_printf(out, "\tavailable\t%u:%u\n", bch2_journal_dev_buckets_available(j, ja, journal_space_discarded), ja->sectors_free); 1379 prt_printf(out, "\tdiscard_idx\t%u\n", ja->discard_idx); 1380 prt_printf(out, "\tdirty_ondisk\t%u (seq %llu)\n", ja->dirty_idx_ondisk, ja->bucket_seq[ja->dirty_idx_ondisk]); 1381 prt_printf(out, "\tdirty_idx\t%u (seq %llu)\n", ja->dirty_idx, ja->bucket_seq[ja->dirty_idx]); 1382 prt_printf(out, "\tcur_idx\t\t%u (seq %llu)\n", ja->cur_idx, ja->bucket_seq[ja->cur_idx]); 1383 } 1384 1385 rcu_read_unlock(); 1386 1387 --out->atomic; 1388 } 1389 1390 void bch2_journal_debug_to_text(struct printbuf *out, struct journal *j) 1391 { 1392 spin_lock(&j->lock); 1393 __bch2_journal_debug_to_text(out, j); 1394 spin_unlock(&j->lock); 1395 } 1396 1397 bool bch2_journal_seq_pins_to_text(struct printbuf *out, struct journal *j, u64 *seq) 1398 { 1399 struct journal_entry_pin_list *pin_list; 1400 struct journal_entry_pin *pin; 1401 unsigned i; 1402 1403 spin_lock(&j->lock); 1404 *seq = max(*seq, j->pin.front); 1405 1406 if (*seq >= j->pin.back) { 1407 spin_unlock(&j->lock); 1408 return true; 1409 } 1410 1411 out->atomic++; 1412 1413 pin_list = journal_seq_pin(j, *seq); 1414 1415 prt_printf(out, "%llu: count %u", *seq, atomic_read(&pin_list->count)); 1416 prt_newline(out); 1417 printbuf_indent_add(out, 2); 1418 1419 for (i = 0; i < ARRAY_SIZE(pin_list->list); i++) 1420 list_for_each_entry(pin, &pin_list->list[i], list) { 1421 prt_printf(out, "\t%px %ps", pin, pin->flush); 1422 prt_newline(out); 1423 } 1424 1425 if (!list_empty(&pin_list->flushed)) { 1426 prt_printf(out, "flushed:"); 1427 prt_newline(out); 1428 } 1429 1430 list_for_each_entry(pin, &pin_list->flushed, list) { 1431 prt_printf(out, "\t%px %ps", pin, pin->flush); 1432 prt_newline(out); 1433 } 1434 1435 printbuf_indent_sub(out, 2); 1436 1437 --out->atomic; 1438 spin_unlock(&j->lock); 1439 1440 return false; 1441 } 1442 1443 void bch2_journal_pins_to_text(struct printbuf *out, struct journal *j) 1444 { 1445 u64 seq = 0; 1446 1447 while (!bch2_journal_seq_pins_to_text(out, j, &seq)) 1448 seq++; 1449 } 1450