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->pin.back - 1 != atomic64_read(&j->seq)); 325 326 BUG_ON(j->buf + (journal_cur_seq(j) & JOURNAL_BUF_MASK) != buf); 327 328 bkey_extent_init(&buf->key); 329 buf->noflush = false; 330 buf->must_flush = false; 331 buf->separate_flush = false; 332 buf->flush_time = 0; 333 334 memset(buf->data, 0, sizeof(*buf->data)); 335 buf->data->seq = cpu_to_le64(journal_cur_seq(j)); 336 buf->data->u64s = 0; 337 338 if (j->early_journal_entries.nr) { 339 memcpy(buf->data->_data, j->early_journal_entries.data, 340 j->early_journal_entries.nr * sizeof(u64)); 341 le32_add_cpu(&buf->data->u64s, j->early_journal_entries.nr); 342 } 343 344 /* 345 * Must be set before marking the journal entry as open: 346 */ 347 j->cur_entry_u64s = u64s; 348 349 v = atomic64_read(&j->reservations.counter); 350 do { 351 old.v = new.v = v; 352 353 BUG_ON(old.cur_entry_offset == JOURNAL_ENTRY_ERROR_VAL); 354 355 new.idx++; 356 BUG_ON(journal_state_count(new, new.idx)); 357 BUG_ON(new.idx != (journal_cur_seq(j) & JOURNAL_BUF_MASK)); 358 359 journal_state_inc(&new); 360 361 /* Handle any already added entries */ 362 new.cur_entry_offset = le32_to_cpu(buf->data->u64s); 363 } while ((v = atomic64_cmpxchg(&j->reservations.counter, 364 old.v, new.v)) != old.v); 365 366 if (j->res_get_blocked_start) 367 bch2_time_stats_update(j->blocked_time, 368 j->res_get_blocked_start); 369 j->res_get_blocked_start = 0; 370 371 mod_delayed_work(c->io_complete_wq, 372 &j->write_work, 373 msecs_to_jiffies(c->opts.journal_flush_delay)); 374 journal_wake(j); 375 376 if (j->early_journal_entries.nr) 377 darray_exit(&j->early_journal_entries); 378 return 0; 379 } 380 381 static bool journal_quiesced(struct journal *j) 382 { 383 bool ret = atomic64_read(&j->seq) == j->seq_ondisk; 384 385 if (!ret) 386 journal_entry_close(j); 387 return ret; 388 } 389 390 static void journal_quiesce(struct journal *j) 391 { 392 wait_event(j->wait, journal_quiesced(j)); 393 } 394 395 static void journal_write_work(struct work_struct *work) 396 { 397 struct journal *j = container_of(work, struct journal, write_work.work); 398 struct bch_fs *c = container_of(j, struct bch_fs, journal); 399 long delta; 400 401 spin_lock(&j->lock); 402 if (!__journal_entry_is_open(j->reservations)) 403 goto unlock; 404 405 delta = journal_cur_buf(j)->expires - jiffies; 406 407 if (delta > 0) 408 mod_delayed_work(c->io_complete_wq, &j->write_work, delta); 409 else 410 __journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL); 411 unlock: 412 spin_unlock(&j->lock); 413 } 414 415 static int __journal_res_get(struct journal *j, struct journal_res *res, 416 unsigned flags) 417 { 418 struct bch_fs *c = container_of(j, struct bch_fs, journal); 419 struct journal_buf *buf; 420 bool can_discard; 421 int ret; 422 retry: 423 if (journal_res_get_fast(j, res, flags)) 424 return 0; 425 426 if (bch2_journal_error(j)) 427 return -BCH_ERR_erofs_journal_err; 428 429 spin_lock(&j->lock); 430 431 /* check once more in case somebody else shut things down... */ 432 if (bch2_journal_error(j)) { 433 spin_unlock(&j->lock); 434 return -BCH_ERR_erofs_journal_err; 435 } 436 437 /* 438 * Recheck after taking the lock, so we don't race with another thread 439 * that just did journal_entry_open() and call journal_entry_close() 440 * unnecessarily 441 */ 442 if (journal_res_get_fast(j, res, flags)) { 443 spin_unlock(&j->lock); 444 return 0; 445 } 446 447 if ((flags & BCH_WATERMARK_MASK) < j->watermark) { 448 /* 449 * Don't want to close current journal entry, just need to 450 * invoke reclaim: 451 */ 452 ret = JOURNAL_ERR_journal_full; 453 goto unlock; 454 } 455 456 /* 457 * If we couldn't get a reservation because the current buf filled up, 458 * and we had room for a bigger entry on disk, signal that we want to 459 * realloc the journal bufs: 460 */ 461 buf = journal_cur_buf(j); 462 if (journal_entry_is_open(j) && 463 buf->buf_size >> 9 < buf->disk_sectors && 464 buf->buf_size < JOURNAL_ENTRY_SIZE_MAX) 465 j->buf_size_want = max(j->buf_size_want, buf->buf_size << 1); 466 467 __journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL); 468 ret = journal_entry_open(j); 469 470 if (ret == JOURNAL_ERR_max_in_flight) 471 trace_and_count(c, journal_entry_full, c); 472 unlock: 473 if ((ret && ret != JOURNAL_ERR_insufficient_devices) && 474 !j->res_get_blocked_start) { 475 j->res_get_blocked_start = local_clock() ?: 1; 476 trace_and_count(c, journal_full, c); 477 } 478 479 can_discard = j->can_discard; 480 spin_unlock(&j->lock); 481 482 if (!ret) 483 goto retry; 484 if (journal_error_check_stuck(j, ret, flags)) 485 ret = -BCH_ERR_journal_res_get_blocked; 486 487 /* 488 * Journal is full - can't rely on reclaim from work item due to 489 * freezing: 490 */ 491 if ((ret == JOURNAL_ERR_journal_full || 492 ret == JOURNAL_ERR_journal_pin_full) && 493 !(flags & JOURNAL_RES_GET_NONBLOCK)) { 494 if (can_discard) { 495 bch2_journal_do_discards(j); 496 goto retry; 497 } 498 499 if (mutex_trylock(&j->reclaim_lock)) { 500 bch2_journal_reclaim(j); 501 mutex_unlock(&j->reclaim_lock); 502 } 503 } 504 505 return ret == JOURNAL_ERR_insufficient_devices 506 ? -BCH_ERR_erofs_journal_err 507 : -BCH_ERR_journal_res_get_blocked; 508 } 509 510 /* 511 * Essentially the entry function to the journaling code. When bcachefs is doing 512 * a btree insert, it calls this function to get the current journal write. 513 * Journal write is the structure used set up journal writes. The calling 514 * function will then add its keys to the structure, queuing them for the next 515 * write. 516 * 517 * To ensure forward progress, the current task must not be holding any 518 * btree node write locks. 519 */ 520 int bch2_journal_res_get_slowpath(struct journal *j, struct journal_res *res, 521 unsigned flags) 522 { 523 int ret; 524 525 closure_wait_event(&j->async_wait, 526 (ret = __journal_res_get(j, res, flags)) != -BCH_ERR_journal_res_get_blocked || 527 (flags & JOURNAL_RES_GET_NONBLOCK)); 528 return ret; 529 } 530 531 /* journal_entry_res: */ 532 533 void bch2_journal_entry_res_resize(struct journal *j, 534 struct journal_entry_res *res, 535 unsigned new_u64s) 536 { 537 union journal_res_state state; 538 int d = new_u64s - res->u64s; 539 540 spin_lock(&j->lock); 541 542 j->entry_u64s_reserved += d; 543 if (d <= 0) 544 goto out; 545 546 j->cur_entry_u64s = max_t(int, 0, j->cur_entry_u64s - d); 547 smp_mb(); 548 state = READ_ONCE(j->reservations); 549 550 if (state.cur_entry_offset < JOURNAL_ENTRY_CLOSED_VAL && 551 state.cur_entry_offset > j->cur_entry_u64s) { 552 j->cur_entry_u64s += d; 553 /* 554 * Not enough room in current journal entry, have to flush it: 555 */ 556 __journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL); 557 } else { 558 journal_cur_buf(j)->u64s_reserved += d; 559 } 560 out: 561 spin_unlock(&j->lock); 562 res->u64s += d; 563 } 564 565 /* journal flushing: */ 566 567 /** 568 * bch2_journal_flush_seq_async - wait for a journal entry to be written 569 * @j: journal object 570 * @seq: seq to flush 571 * @parent: closure object to wait with 572 * Returns: 1 if @seq has already been flushed, 0 if @seq is being flushed, 573 * -EIO if @seq will never be flushed 574 * 575 * Like bch2_journal_wait_on_seq, except that it triggers a write immediately if 576 * necessary 577 */ 578 int bch2_journal_flush_seq_async(struct journal *j, u64 seq, 579 struct closure *parent) 580 { 581 struct journal_buf *buf; 582 int ret = 0; 583 584 if (seq <= j->flushed_seq_ondisk) 585 return 1; 586 587 spin_lock(&j->lock); 588 589 if (WARN_ONCE(seq > journal_cur_seq(j), 590 "requested to flush journal seq %llu, but currently at %llu", 591 seq, journal_cur_seq(j))) 592 goto out; 593 594 /* Recheck under lock: */ 595 if (j->err_seq && seq >= j->err_seq) { 596 ret = -EIO; 597 goto out; 598 } 599 600 if (seq <= j->flushed_seq_ondisk) { 601 ret = 1; 602 goto out; 603 } 604 605 /* if seq was written, but not flushed - flush a newer one instead */ 606 seq = max(seq, journal_last_unwritten_seq(j)); 607 608 recheck_need_open: 609 if (seq > journal_cur_seq(j)) { 610 struct journal_res res = { 0 }; 611 612 if (journal_entry_is_open(j)) 613 __journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL); 614 615 spin_unlock(&j->lock); 616 617 ret = bch2_journal_res_get(j, &res, jset_u64s(0), 0); 618 if (ret) 619 return ret; 620 621 seq = res.seq; 622 buf = j->buf + (seq & JOURNAL_BUF_MASK); 623 buf->must_flush = true; 624 625 if (!buf->flush_time) { 626 buf->flush_time = local_clock() ?: 1; 627 buf->expires = jiffies; 628 } 629 630 if (parent && !closure_wait(&buf->wait, parent)) 631 BUG(); 632 633 bch2_journal_res_put(j, &res); 634 635 spin_lock(&j->lock); 636 goto want_write; 637 } 638 639 /* 640 * if write was kicked off without a flush, flush the next sequence 641 * number instead 642 */ 643 buf = journal_seq_to_buf(j, seq); 644 if (buf->noflush) { 645 seq++; 646 goto recheck_need_open; 647 } 648 649 buf->must_flush = true; 650 651 if (parent && !closure_wait(&buf->wait, parent)) 652 BUG(); 653 want_write: 654 if (seq == journal_cur_seq(j)) 655 journal_entry_want_write(j); 656 out: 657 spin_unlock(&j->lock); 658 return ret; 659 } 660 661 int bch2_journal_flush_seq(struct journal *j, u64 seq) 662 { 663 u64 start_time = local_clock(); 664 int ret, ret2; 665 666 /* 667 * Don't update time_stats when @seq is already flushed: 668 */ 669 if (seq <= j->flushed_seq_ondisk) 670 return 0; 671 672 ret = wait_event_interruptible(j->wait, (ret2 = bch2_journal_flush_seq_async(j, seq, NULL))); 673 674 if (!ret) 675 bch2_time_stats_update(j->flush_seq_time, start_time); 676 677 return ret ?: ret2 < 0 ? ret2 : 0; 678 } 679 680 /* 681 * bch2_journal_flush_async - if there is an open journal entry, or a journal 682 * still being written, write it and wait for the write to complete 683 */ 684 void bch2_journal_flush_async(struct journal *j, struct closure *parent) 685 { 686 bch2_journal_flush_seq_async(j, atomic64_read(&j->seq), parent); 687 } 688 689 int bch2_journal_flush(struct journal *j) 690 { 691 return bch2_journal_flush_seq(j, atomic64_read(&j->seq)); 692 } 693 694 /* 695 * bch2_journal_noflush_seq - tell the journal not to issue any flushes before 696 * @seq 697 */ 698 bool bch2_journal_noflush_seq(struct journal *j, u64 seq) 699 { 700 struct bch_fs *c = container_of(j, struct bch_fs, journal); 701 u64 unwritten_seq; 702 bool ret = false; 703 704 if (!(c->sb.features & (1ULL << BCH_FEATURE_journal_no_flush))) 705 return false; 706 707 if (seq <= c->journal.flushed_seq_ondisk) 708 return false; 709 710 spin_lock(&j->lock); 711 if (seq <= c->journal.flushed_seq_ondisk) 712 goto out; 713 714 for (unwritten_seq = journal_last_unwritten_seq(j); 715 unwritten_seq < seq; 716 unwritten_seq++) { 717 struct journal_buf *buf = journal_seq_to_buf(j, unwritten_seq); 718 719 /* journal write is already in flight, and was a flush write: */ 720 if (unwritten_seq == journal_last_unwritten_seq(j) && !buf->noflush) 721 goto out; 722 723 buf->noflush = true; 724 } 725 726 ret = true; 727 out: 728 spin_unlock(&j->lock); 729 return ret; 730 } 731 732 int bch2_journal_meta(struct journal *j) 733 { 734 struct journal_buf *buf; 735 struct journal_res res; 736 int ret; 737 738 memset(&res, 0, sizeof(res)); 739 740 ret = bch2_journal_res_get(j, &res, jset_u64s(0), 0); 741 if (ret) 742 return ret; 743 744 buf = j->buf + (res.seq & JOURNAL_BUF_MASK); 745 buf->must_flush = true; 746 747 if (!buf->flush_time) { 748 buf->flush_time = local_clock() ?: 1; 749 buf->expires = jiffies; 750 } 751 752 bch2_journal_res_put(j, &res); 753 754 return bch2_journal_flush_seq(j, res.seq); 755 } 756 757 /* block/unlock the journal: */ 758 759 void bch2_journal_unblock(struct journal *j) 760 { 761 spin_lock(&j->lock); 762 j->blocked--; 763 spin_unlock(&j->lock); 764 765 journal_wake(j); 766 } 767 768 void bch2_journal_block(struct journal *j) 769 { 770 spin_lock(&j->lock); 771 j->blocked++; 772 spin_unlock(&j->lock); 773 774 journal_quiesce(j); 775 } 776 777 /* allocate journal on a device: */ 778 779 static int __bch2_set_nr_journal_buckets(struct bch_dev *ca, unsigned nr, 780 bool new_fs, struct closure *cl) 781 { 782 struct bch_fs *c = ca->fs; 783 struct journal_device *ja = &ca->journal; 784 u64 *new_bucket_seq = NULL, *new_buckets = NULL; 785 struct open_bucket **ob = NULL; 786 long *bu = NULL; 787 unsigned i, pos, nr_got = 0, nr_want = nr - ja->nr; 788 int ret = 0; 789 790 BUG_ON(nr <= ja->nr); 791 792 bu = kcalloc(nr_want, sizeof(*bu), GFP_KERNEL); 793 ob = kcalloc(nr_want, sizeof(*ob), GFP_KERNEL); 794 new_buckets = kcalloc(nr, sizeof(u64), GFP_KERNEL); 795 new_bucket_seq = kcalloc(nr, sizeof(u64), GFP_KERNEL); 796 if (!bu || !ob || !new_buckets || !new_bucket_seq) { 797 ret = -BCH_ERR_ENOMEM_set_nr_journal_buckets; 798 goto err_free; 799 } 800 801 for (nr_got = 0; nr_got < nr_want; nr_got++) { 802 if (new_fs) { 803 bu[nr_got] = bch2_bucket_alloc_new_fs(ca); 804 if (bu[nr_got] < 0) { 805 ret = -BCH_ERR_ENOSPC_bucket_alloc; 806 break; 807 } 808 } else { 809 ob[nr_got] = bch2_bucket_alloc(c, ca, BCH_WATERMARK_normal, cl); 810 ret = PTR_ERR_OR_ZERO(ob[nr_got]); 811 if (ret) 812 break; 813 814 ret = bch2_trans_run(c, 815 bch2_trans_mark_metadata_bucket(trans, ca, 816 ob[nr_got]->bucket, BCH_DATA_journal, 817 ca->mi.bucket_size)); 818 if (ret) { 819 bch2_open_bucket_put(c, ob[nr_got]); 820 bch_err_msg(c, ret, "marking new journal buckets"); 821 break; 822 } 823 824 bu[nr_got] = ob[nr_got]->bucket; 825 } 826 } 827 828 if (!nr_got) 829 goto err_free; 830 831 /* Don't return an error if we successfully allocated some buckets: */ 832 ret = 0; 833 834 if (c) { 835 bch2_journal_flush_all_pins(&c->journal); 836 bch2_journal_block(&c->journal); 837 mutex_lock(&c->sb_lock); 838 } 839 840 memcpy(new_buckets, ja->buckets, ja->nr * sizeof(u64)); 841 memcpy(new_bucket_seq, ja->bucket_seq, ja->nr * sizeof(u64)); 842 843 BUG_ON(ja->discard_idx > ja->nr); 844 845 pos = ja->discard_idx ?: ja->nr; 846 847 memmove(new_buckets + pos + nr_got, 848 new_buckets + pos, 849 sizeof(new_buckets[0]) * (ja->nr - pos)); 850 memmove(new_bucket_seq + pos + nr_got, 851 new_bucket_seq + pos, 852 sizeof(new_bucket_seq[0]) * (ja->nr - pos)); 853 854 for (i = 0; i < nr_got; i++) { 855 new_buckets[pos + i] = bu[i]; 856 new_bucket_seq[pos + i] = 0; 857 } 858 859 nr = ja->nr + nr_got; 860 861 ret = bch2_journal_buckets_to_sb(c, ca, new_buckets, nr); 862 if (ret) 863 goto err_unblock; 864 865 if (!new_fs) 866 bch2_write_super(c); 867 868 /* Commit: */ 869 if (c) 870 spin_lock(&c->journal.lock); 871 872 swap(new_buckets, ja->buckets); 873 swap(new_bucket_seq, ja->bucket_seq); 874 ja->nr = nr; 875 876 if (pos <= ja->discard_idx) 877 ja->discard_idx = (ja->discard_idx + nr_got) % ja->nr; 878 if (pos <= ja->dirty_idx_ondisk) 879 ja->dirty_idx_ondisk = (ja->dirty_idx_ondisk + nr_got) % ja->nr; 880 if (pos <= ja->dirty_idx) 881 ja->dirty_idx = (ja->dirty_idx + nr_got) % ja->nr; 882 if (pos <= ja->cur_idx) 883 ja->cur_idx = (ja->cur_idx + nr_got) % ja->nr; 884 885 if (c) 886 spin_unlock(&c->journal.lock); 887 err_unblock: 888 if (c) { 889 bch2_journal_unblock(&c->journal); 890 mutex_unlock(&c->sb_lock); 891 } 892 893 if (ret && !new_fs) 894 for (i = 0; i < nr_got; i++) 895 bch2_trans_run(c, 896 bch2_trans_mark_metadata_bucket(trans, ca, 897 bu[i], BCH_DATA_free, 0)); 898 err_free: 899 if (!new_fs) 900 for (i = 0; i < nr_got; i++) 901 bch2_open_bucket_put(c, ob[i]); 902 903 kfree(new_bucket_seq); 904 kfree(new_buckets); 905 kfree(ob); 906 kfree(bu); 907 return ret; 908 } 909 910 /* 911 * Allocate more journal space at runtime - not currently making use if it, but 912 * the code works: 913 */ 914 int bch2_set_nr_journal_buckets(struct bch_fs *c, struct bch_dev *ca, 915 unsigned nr) 916 { 917 struct journal_device *ja = &ca->journal; 918 struct closure cl; 919 int ret = 0; 920 921 closure_init_stack(&cl); 922 923 down_write(&c->state_lock); 924 925 /* don't handle reducing nr of buckets yet: */ 926 if (nr < ja->nr) 927 goto unlock; 928 929 while (ja->nr < nr) { 930 struct disk_reservation disk_res = { 0, 0, 0 }; 931 932 /* 933 * note: journal buckets aren't really counted as _sectors_ used yet, so 934 * we don't need the disk reservation to avoid the BUG_ON() in buckets.c 935 * when space used goes up without a reservation - but we do need the 936 * reservation to ensure we'll actually be able to allocate: 937 * 938 * XXX: that's not right, disk reservations only ensure a 939 * filesystem-wide allocation will succeed, this is a device 940 * specific allocation - we can hang here: 941 */ 942 943 ret = bch2_disk_reservation_get(c, &disk_res, 944 bucket_to_sector(ca, nr - ja->nr), 1, 0); 945 if (ret) 946 break; 947 948 ret = __bch2_set_nr_journal_buckets(ca, nr, false, &cl); 949 950 bch2_disk_reservation_put(c, &disk_res); 951 952 closure_sync(&cl); 953 954 if (ret && ret != -BCH_ERR_bucket_alloc_blocked) 955 break; 956 } 957 958 if (ret) 959 bch_err_fn(c, ret); 960 unlock: 961 up_write(&c->state_lock); 962 return ret; 963 } 964 965 int bch2_dev_journal_alloc(struct bch_dev *ca) 966 { 967 unsigned nr; 968 int ret; 969 970 if (dynamic_fault("bcachefs:add:journal_alloc")) { 971 ret = -BCH_ERR_ENOMEM_set_nr_journal_buckets; 972 goto err; 973 } 974 975 /* 1/128th of the device by default: */ 976 nr = ca->mi.nbuckets >> 7; 977 978 /* 979 * clamp journal size to 8192 buckets or 8GB (in sectors), whichever 980 * is smaller: 981 */ 982 nr = clamp_t(unsigned, nr, 983 BCH_JOURNAL_BUCKETS_MIN, 984 min(1 << 13, 985 (1 << 24) / ca->mi.bucket_size)); 986 987 ret = __bch2_set_nr_journal_buckets(ca, nr, true, NULL); 988 err: 989 if (ret) 990 bch_err_fn(ca, ret); 991 return ret; 992 } 993 994 int bch2_fs_journal_alloc(struct bch_fs *c) 995 { 996 struct bch_dev *ca; 997 unsigned i; 998 999 for_each_online_member(ca, c, i) { 1000 if (ca->journal.nr) 1001 continue; 1002 1003 int ret = bch2_dev_journal_alloc(ca); 1004 if (ret) { 1005 percpu_ref_put(&ca->io_ref); 1006 return ret; 1007 } 1008 } 1009 1010 return 0; 1011 } 1012 1013 /* startup/shutdown: */ 1014 1015 static bool bch2_journal_writing_to_device(struct journal *j, unsigned dev_idx) 1016 { 1017 bool ret = false; 1018 u64 seq; 1019 1020 spin_lock(&j->lock); 1021 for (seq = journal_last_unwritten_seq(j); 1022 seq <= journal_cur_seq(j) && !ret; 1023 seq++) { 1024 struct journal_buf *buf = journal_seq_to_buf(j, seq); 1025 1026 if (bch2_bkey_has_device_c(bkey_i_to_s_c(&buf->key), dev_idx)) 1027 ret = true; 1028 } 1029 spin_unlock(&j->lock); 1030 1031 return ret; 1032 } 1033 1034 void bch2_dev_journal_stop(struct journal *j, struct bch_dev *ca) 1035 { 1036 wait_event(j->wait, !bch2_journal_writing_to_device(j, ca->dev_idx)); 1037 } 1038 1039 void bch2_fs_journal_stop(struct journal *j) 1040 { 1041 bch2_journal_reclaim_stop(j); 1042 bch2_journal_flush_all_pins(j); 1043 1044 wait_event(j->wait, journal_entry_close(j)); 1045 1046 /* 1047 * Always write a new journal entry, to make sure the clock hands are up 1048 * to date (and match the superblock) 1049 */ 1050 bch2_journal_meta(j); 1051 1052 journal_quiesce(j); 1053 1054 BUG_ON(!bch2_journal_error(j) && 1055 test_bit(JOURNAL_REPLAY_DONE, &j->flags) && 1056 j->last_empty_seq != journal_cur_seq(j)); 1057 1058 cancel_delayed_work_sync(&j->write_work); 1059 } 1060 1061 int bch2_fs_journal_start(struct journal *j, u64 cur_seq) 1062 { 1063 struct bch_fs *c = container_of(j, struct bch_fs, journal); 1064 struct journal_entry_pin_list *p; 1065 struct journal_replay *i, **_i; 1066 struct genradix_iter iter; 1067 bool had_entries = false; 1068 unsigned ptr; 1069 u64 last_seq = cur_seq, nr, seq; 1070 1071 genradix_for_each_reverse(&c->journal_entries, iter, _i) { 1072 i = *_i; 1073 1074 if (!i || i->ignore) 1075 continue; 1076 1077 last_seq = le64_to_cpu(i->j.last_seq); 1078 break; 1079 } 1080 1081 nr = cur_seq - last_seq; 1082 1083 if (nr + 1 > j->pin.size) { 1084 free_fifo(&j->pin); 1085 init_fifo(&j->pin, roundup_pow_of_two(nr + 1), GFP_KERNEL); 1086 if (!j->pin.data) { 1087 bch_err(c, "error reallocating journal fifo (%llu open entries)", nr); 1088 return -BCH_ERR_ENOMEM_journal_pin_fifo; 1089 } 1090 } 1091 1092 j->replay_journal_seq = last_seq; 1093 j->replay_journal_seq_end = cur_seq; 1094 j->last_seq_ondisk = last_seq; 1095 j->flushed_seq_ondisk = cur_seq - 1; 1096 j->seq_ondisk = cur_seq - 1; 1097 j->pin.front = last_seq; 1098 j->pin.back = cur_seq; 1099 atomic64_set(&j->seq, cur_seq - 1); 1100 1101 fifo_for_each_entry_ptr(p, &j->pin, seq) 1102 journal_pin_list_init(p, 1); 1103 1104 genradix_for_each(&c->journal_entries, iter, _i) { 1105 i = *_i; 1106 1107 if (!i || i->ignore) 1108 continue; 1109 1110 seq = le64_to_cpu(i->j.seq); 1111 BUG_ON(seq >= cur_seq); 1112 1113 if (seq < last_seq) 1114 continue; 1115 1116 if (journal_entry_empty(&i->j)) 1117 j->last_empty_seq = le64_to_cpu(i->j.seq); 1118 1119 p = journal_seq_pin(j, seq); 1120 1121 p->devs.nr = 0; 1122 for (ptr = 0; ptr < i->nr_ptrs; ptr++) 1123 bch2_dev_list_add_dev(&p->devs, i->ptrs[ptr].dev); 1124 1125 had_entries = true; 1126 } 1127 1128 if (!had_entries) 1129 j->last_empty_seq = cur_seq; 1130 1131 spin_lock(&j->lock); 1132 1133 set_bit(JOURNAL_STARTED, &j->flags); 1134 j->last_flush_write = jiffies; 1135 1136 j->reservations.idx = j->reservations.unwritten_idx = journal_cur_seq(j); 1137 j->reservations.unwritten_idx++; 1138 1139 c->last_bucket_seq_cleanup = journal_cur_seq(j); 1140 1141 bch2_journal_space_available(j); 1142 spin_unlock(&j->lock); 1143 1144 return bch2_journal_reclaim_start(j); 1145 } 1146 1147 /* init/exit: */ 1148 1149 void bch2_dev_journal_exit(struct bch_dev *ca) 1150 { 1151 kfree(ca->journal.bio); 1152 kfree(ca->journal.buckets); 1153 kfree(ca->journal.bucket_seq); 1154 1155 ca->journal.bio = NULL; 1156 ca->journal.buckets = NULL; 1157 ca->journal.bucket_seq = NULL; 1158 } 1159 1160 int bch2_dev_journal_init(struct bch_dev *ca, struct bch_sb *sb) 1161 { 1162 struct journal_device *ja = &ca->journal; 1163 struct bch_sb_field_journal *journal_buckets = 1164 bch2_sb_field_get(sb, journal); 1165 struct bch_sb_field_journal_v2 *journal_buckets_v2 = 1166 bch2_sb_field_get(sb, journal_v2); 1167 unsigned i, nr_bvecs; 1168 1169 ja->nr = 0; 1170 1171 if (journal_buckets_v2) { 1172 unsigned nr = bch2_sb_field_journal_v2_nr_entries(journal_buckets_v2); 1173 1174 for (i = 0; i < nr; i++) 1175 ja->nr += le64_to_cpu(journal_buckets_v2->d[i].nr); 1176 } else if (journal_buckets) { 1177 ja->nr = bch2_nr_journal_buckets(journal_buckets); 1178 } 1179 1180 ja->bucket_seq = kcalloc(ja->nr, sizeof(u64), GFP_KERNEL); 1181 if (!ja->bucket_seq) 1182 return -BCH_ERR_ENOMEM_dev_journal_init; 1183 1184 nr_bvecs = DIV_ROUND_UP(JOURNAL_ENTRY_SIZE_MAX, PAGE_SIZE); 1185 1186 ca->journal.bio = bio_kmalloc(nr_bvecs, GFP_KERNEL); 1187 if (!ca->journal.bio) 1188 return -BCH_ERR_ENOMEM_dev_journal_init; 1189 1190 bio_init(ca->journal.bio, NULL, ca->journal.bio->bi_inline_vecs, nr_bvecs, 0); 1191 1192 ja->buckets = kcalloc(ja->nr, sizeof(u64), GFP_KERNEL); 1193 if (!ja->buckets) 1194 return -BCH_ERR_ENOMEM_dev_journal_init; 1195 1196 if (journal_buckets_v2) { 1197 unsigned nr = bch2_sb_field_journal_v2_nr_entries(journal_buckets_v2); 1198 unsigned j, dst = 0; 1199 1200 for (i = 0; i < nr; i++) 1201 for (j = 0; j < le64_to_cpu(journal_buckets_v2->d[i].nr); j++) 1202 ja->buckets[dst++] = 1203 le64_to_cpu(journal_buckets_v2->d[i].start) + j; 1204 } else if (journal_buckets) { 1205 for (i = 0; i < ja->nr; i++) 1206 ja->buckets[i] = le64_to_cpu(journal_buckets->buckets[i]); 1207 } 1208 1209 return 0; 1210 } 1211 1212 void bch2_fs_journal_exit(struct journal *j) 1213 { 1214 unsigned i; 1215 1216 darray_exit(&j->early_journal_entries); 1217 1218 for (i = 0; i < ARRAY_SIZE(j->buf); i++) 1219 kvpfree(j->buf[i].data, j->buf[i].buf_size); 1220 free_fifo(&j->pin); 1221 } 1222 1223 int bch2_fs_journal_init(struct journal *j) 1224 { 1225 static struct lock_class_key res_key; 1226 unsigned i; 1227 1228 spin_lock_init(&j->lock); 1229 spin_lock_init(&j->err_lock); 1230 init_waitqueue_head(&j->wait); 1231 INIT_DELAYED_WORK(&j->write_work, journal_write_work); 1232 init_waitqueue_head(&j->reclaim_wait); 1233 init_waitqueue_head(&j->pin_flush_wait); 1234 mutex_init(&j->reclaim_lock); 1235 mutex_init(&j->discard_lock); 1236 1237 lockdep_init_map(&j->res_map, "journal res", &res_key, 0); 1238 1239 atomic64_set(&j->reservations.counter, 1240 ((union journal_res_state) 1241 { .cur_entry_offset = JOURNAL_ENTRY_CLOSED_VAL }).v); 1242 1243 if (!(init_fifo(&j->pin, JOURNAL_PIN, GFP_KERNEL))) 1244 return -BCH_ERR_ENOMEM_journal_pin_fifo; 1245 1246 for (i = 0; i < ARRAY_SIZE(j->buf); i++) { 1247 j->buf[i].buf_size = JOURNAL_ENTRY_SIZE_MIN; 1248 j->buf[i].data = kvpmalloc(j->buf[i].buf_size, GFP_KERNEL); 1249 if (!j->buf[i].data) 1250 return -BCH_ERR_ENOMEM_journal_buf; 1251 } 1252 1253 j->pin.front = j->pin.back = 1; 1254 return 0; 1255 } 1256 1257 /* debug: */ 1258 1259 void __bch2_journal_debug_to_text(struct printbuf *out, struct journal *j) 1260 { 1261 struct bch_fs *c = container_of(j, struct bch_fs, journal); 1262 union journal_res_state s; 1263 struct bch_dev *ca; 1264 unsigned long now = jiffies; 1265 u64 seq; 1266 unsigned i; 1267 1268 if (!out->nr_tabstops) 1269 printbuf_tabstop_push(out, 24); 1270 out->atomic++; 1271 1272 rcu_read_lock(); 1273 s = READ_ONCE(j->reservations); 1274 1275 prt_printf(out, "dirty journal entries:\t%llu/%llu\n", fifo_used(&j->pin), j->pin.size); 1276 prt_printf(out, "seq:\t\t\t%llu\n", journal_cur_seq(j)); 1277 prt_printf(out, "seq_ondisk:\t\t%llu\n", j->seq_ondisk); 1278 prt_printf(out, "last_seq:\t\t%llu\n", journal_last_seq(j)); 1279 prt_printf(out, "last_seq_ondisk:\t%llu\n", j->last_seq_ondisk); 1280 prt_printf(out, "flushed_seq_ondisk:\t%llu\n", j->flushed_seq_ondisk); 1281 prt_printf(out, "watermark:\t\t%s\n", bch2_watermarks[j->watermark]); 1282 prt_printf(out, "each entry reserved:\t%u\n", j->entry_u64s_reserved); 1283 prt_printf(out, "nr flush writes:\t%llu\n", j->nr_flush_writes); 1284 prt_printf(out, "nr noflush writes:\t%llu\n", j->nr_noflush_writes); 1285 prt_printf(out, "nr direct reclaim:\t%llu\n", j->nr_direct_reclaim); 1286 prt_printf(out, "nr background reclaim:\t%llu\n", j->nr_background_reclaim); 1287 prt_printf(out, "reclaim kicked:\t\t%u\n", j->reclaim_kicked); 1288 prt_printf(out, "reclaim runs in:\t%u ms\n", time_after(j->next_reclaim, now) 1289 ? jiffies_to_msecs(j->next_reclaim - jiffies) : 0); 1290 prt_printf(out, "current entry sectors:\t%u\n", j->cur_entry_sectors); 1291 prt_printf(out, "current entry error:\t%s\n", bch2_journal_errors[j->cur_entry_error]); 1292 prt_printf(out, "current entry:\t\t"); 1293 1294 switch (s.cur_entry_offset) { 1295 case JOURNAL_ENTRY_ERROR_VAL: 1296 prt_printf(out, "error"); 1297 break; 1298 case JOURNAL_ENTRY_CLOSED_VAL: 1299 prt_printf(out, "closed"); 1300 break; 1301 default: 1302 prt_printf(out, "%u/%u", s.cur_entry_offset, j->cur_entry_u64s); 1303 break; 1304 } 1305 1306 prt_newline(out); 1307 1308 for (seq = journal_cur_seq(j); 1309 seq >= journal_last_unwritten_seq(j); 1310 --seq) { 1311 i = seq & JOURNAL_BUF_MASK; 1312 1313 prt_printf(out, "unwritten entry:"); 1314 prt_tab(out); 1315 prt_printf(out, "%llu", seq); 1316 prt_newline(out); 1317 printbuf_indent_add(out, 2); 1318 1319 prt_printf(out, "refcount:"); 1320 prt_tab(out); 1321 prt_printf(out, "%u", journal_state_count(s, i)); 1322 prt_newline(out); 1323 1324 prt_printf(out, "sectors:"); 1325 prt_tab(out); 1326 prt_printf(out, "%u", j->buf[i].sectors); 1327 prt_newline(out); 1328 1329 prt_printf(out, "expires"); 1330 prt_tab(out); 1331 prt_printf(out, "%li jiffies", j->buf[i].expires - jiffies); 1332 prt_newline(out); 1333 1334 printbuf_indent_sub(out, 2); 1335 } 1336 1337 prt_printf(out, 1338 "replay done:\t\t%i\n", 1339 test_bit(JOURNAL_REPLAY_DONE, &j->flags)); 1340 1341 prt_printf(out, "space:\n"); 1342 prt_printf(out, "\tdiscarded\t%u:%u\n", 1343 j->space[journal_space_discarded].next_entry, 1344 j->space[journal_space_discarded].total); 1345 prt_printf(out, "\tclean ondisk\t%u:%u\n", 1346 j->space[journal_space_clean_ondisk].next_entry, 1347 j->space[journal_space_clean_ondisk].total); 1348 prt_printf(out, "\tclean\t\t%u:%u\n", 1349 j->space[journal_space_clean].next_entry, 1350 j->space[journal_space_clean].total); 1351 prt_printf(out, "\ttotal\t\t%u:%u\n", 1352 j->space[journal_space_total].next_entry, 1353 j->space[journal_space_total].total); 1354 1355 for_each_member_device_rcu(ca, c, i, 1356 &c->rw_devs[BCH_DATA_journal]) { 1357 struct journal_device *ja = &ca->journal; 1358 1359 if (!test_bit(ca->dev_idx, c->rw_devs[BCH_DATA_journal].d)) 1360 continue; 1361 1362 if (!ja->nr) 1363 continue; 1364 1365 prt_printf(out, "dev %u:\n", i); 1366 prt_printf(out, "\tnr\t\t%u\n", ja->nr); 1367 prt_printf(out, "\tbucket size\t%u\n", ca->mi.bucket_size); 1368 prt_printf(out, "\tavailable\t%u:%u\n", bch2_journal_dev_buckets_available(j, ja, journal_space_discarded), ja->sectors_free); 1369 prt_printf(out, "\tdiscard_idx\t%u\n", ja->discard_idx); 1370 prt_printf(out, "\tdirty_ondisk\t%u (seq %llu)\n", ja->dirty_idx_ondisk, ja->bucket_seq[ja->dirty_idx_ondisk]); 1371 prt_printf(out, "\tdirty_idx\t%u (seq %llu)\n", ja->dirty_idx, ja->bucket_seq[ja->dirty_idx]); 1372 prt_printf(out, "\tcur_idx\t\t%u (seq %llu)\n", ja->cur_idx, ja->bucket_seq[ja->cur_idx]); 1373 } 1374 1375 rcu_read_unlock(); 1376 1377 --out->atomic; 1378 } 1379 1380 void bch2_journal_debug_to_text(struct printbuf *out, struct journal *j) 1381 { 1382 spin_lock(&j->lock); 1383 __bch2_journal_debug_to_text(out, j); 1384 spin_unlock(&j->lock); 1385 } 1386 1387 bool bch2_journal_seq_pins_to_text(struct printbuf *out, struct journal *j, u64 *seq) 1388 { 1389 struct journal_entry_pin_list *pin_list; 1390 struct journal_entry_pin *pin; 1391 unsigned i; 1392 1393 spin_lock(&j->lock); 1394 *seq = max(*seq, j->pin.front); 1395 1396 if (*seq >= j->pin.back) { 1397 spin_unlock(&j->lock); 1398 return true; 1399 } 1400 1401 out->atomic++; 1402 1403 pin_list = journal_seq_pin(j, *seq); 1404 1405 prt_printf(out, "%llu: count %u", *seq, atomic_read(&pin_list->count)); 1406 prt_newline(out); 1407 printbuf_indent_add(out, 2); 1408 1409 for (i = 0; i < ARRAY_SIZE(pin_list->list); i++) 1410 list_for_each_entry(pin, &pin_list->list[i], list) { 1411 prt_printf(out, "\t%px %ps", pin, pin->flush); 1412 prt_newline(out); 1413 } 1414 1415 if (!list_empty(&pin_list->flushed)) { 1416 prt_printf(out, "flushed:"); 1417 prt_newline(out); 1418 } 1419 1420 list_for_each_entry(pin, &pin_list->flushed, list) { 1421 prt_printf(out, "\t%px %ps", pin, pin->flush); 1422 prt_newline(out); 1423 } 1424 1425 printbuf_indent_sub(out, 2); 1426 1427 --out->atomic; 1428 spin_unlock(&j->lock); 1429 1430 return false; 1431 } 1432 1433 void bch2_journal_pins_to_text(struct printbuf *out, struct journal *j) 1434 { 1435 u64 seq = 0; 1436 1437 while (!bch2_journal_seq_pins_to_text(out, j, &seq)) 1438 seq++; 1439 } 1440