1584 lines · c
1// SPDX-License-Identifier: GPL-2.02/*3 * bcachefs journalling code, for btree insertions4 *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 "btree_write_buffer.h"14#include "buckets.h"15#include "error.h"16#include "journal.h"17#include "journal_io.h"18#include "journal_reclaim.h"19#include "journal_sb.h"20#include "journal_seq_blacklist.h"21#include "trace.h"22 23static const char * const bch2_journal_errors[] = {24#define x(n) #n,25 JOURNAL_ERRORS()26#undef x27 NULL28};29 30static inline bool journal_seq_unwritten(struct journal *j, u64 seq)31{32 return seq > j->seq_ondisk;33}34 35static bool __journal_entry_is_open(union journal_res_state state)36{37 return state.cur_entry_offset < JOURNAL_ENTRY_CLOSED_VAL;38}39 40static inline unsigned nr_unwritten_journal_entries(struct journal *j)41{42 return atomic64_read(&j->seq) - j->seq_ondisk;43}44 45static bool journal_entry_is_open(struct journal *j)46{47 return __journal_entry_is_open(j->reservations);48}49 50static void bch2_journal_buf_to_text(struct printbuf *out, struct journal *j, u64 seq)51{52 union journal_res_state s = READ_ONCE(j->reservations);53 unsigned i = seq & JOURNAL_BUF_MASK;54 struct journal_buf *buf = j->buf + i;55 56 prt_printf(out, "seq:\t%llu\n", seq);57 printbuf_indent_add(out, 2);58 59 prt_printf(out, "refcount:\t%u\n", journal_state_count(s, i));60 61 prt_printf(out, "size:\t");62 prt_human_readable_u64(out, vstruct_bytes(buf->data));63 prt_newline(out);64 65 prt_printf(out, "expires:\t");66 prt_printf(out, "%li jiffies\n", buf->expires - jiffies);67 68 prt_printf(out, "flags:\t");69 if (buf->noflush)70 prt_str(out, "noflush ");71 if (buf->must_flush)72 prt_str(out, "must_flush ");73 if (buf->separate_flush)74 prt_str(out, "separate_flush ");75 if (buf->need_flush_to_write_buffer)76 prt_str(out, "need_flush_to_write_buffer ");77 if (buf->write_started)78 prt_str(out, "write_started ");79 if (buf->write_allocated)80 prt_str(out, "write_allocated ");81 if (buf->write_done)82 prt_str(out, "write_done");83 prt_newline(out);84 85 printbuf_indent_sub(out, 2);86}87 88static void bch2_journal_bufs_to_text(struct printbuf *out, struct journal *j)89{90 if (!out->nr_tabstops)91 printbuf_tabstop_push(out, 24);92 93 for (u64 seq = journal_last_unwritten_seq(j);94 seq <= journal_cur_seq(j);95 seq++)96 bch2_journal_buf_to_text(out, j, seq);97 prt_printf(out, "last buf %s\n", journal_entry_is_open(j) ? "open" : "closed");98}99 100static inline struct journal_buf *101journal_seq_to_buf(struct journal *j, u64 seq)102{103 struct journal_buf *buf = NULL;104 105 EBUG_ON(seq > journal_cur_seq(j));106 107 if (journal_seq_unwritten(j, seq)) {108 buf = j->buf + (seq & JOURNAL_BUF_MASK);109 EBUG_ON(le64_to_cpu(buf->data->seq) != seq);110 }111 return buf;112}113 114static void journal_pin_list_init(struct journal_entry_pin_list *p, int count)115{116 unsigned i;117 118 for (i = 0; i < ARRAY_SIZE(p->list); i++)119 INIT_LIST_HEAD(&p->list[i]);120 INIT_LIST_HEAD(&p->flushed);121 atomic_set(&p->count, count);122 p->devs.nr = 0;123}124 125/*126 * Detect stuck journal conditions and trigger shutdown. Technically the journal127 * can end up stuck for a variety of reasons, such as a blocked I/O, journal128 * reservation lockup, etc. Since this is a fatal error with potentially129 * unpredictable characteristics, we want to be fairly conservative before we130 * decide to shut things down.131 *132 * Consider the journal stuck when it appears full with no ability to commit133 * btree transactions, to discard journal buckets, nor acquire priority134 * (reserved watermark) reservation.135 */136static inline bool137journal_error_check_stuck(struct journal *j, int error, unsigned flags)138{139 struct bch_fs *c = container_of(j, struct bch_fs, journal);140 bool stuck = false;141 struct printbuf buf = PRINTBUF;142 143 if (!(error == JOURNAL_ERR_journal_full ||144 error == JOURNAL_ERR_journal_pin_full) ||145 nr_unwritten_journal_entries(j) ||146 (flags & BCH_WATERMARK_MASK) != BCH_WATERMARK_reclaim)147 return stuck;148 149 spin_lock(&j->lock);150 151 if (j->can_discard) {152 spin_unlock(&j->lock);153 return stuck;154 }155 156 stuck = true;157 158 /*159 * The journal shutdown path will set ->err_seq, but do it here first to160 * serialize against concurrent failures and avoid duplicate error161 * reports.162 */163 if (j->err_seq) {164 spin_unlock(&j->lock);165 return stuck;166 }167 j->err_seq = journal_cur_seq(j);168 spin_unlock(&j->lock);169 170 bch_err(c, "Journal stuck! Hava a pre-reservation but journal full (error %s)",171 bch2_journal_errors[error]);172 bch2_journal_debug_to_text(&buf, j);173 bch_err(c, "%s", buf.buf);174 175 printbuf_reset(&buf);176 bch2_journal_pins_to_text(&buf, j);177 bch_err(c, "Journal pins:\n%s", buf.buf);178 printbuf_exit(&buf);179 180 bch2_fatal_error(c);181 dump_stack();182 183 return stuck;184}185 186void bch2_journal_do_writes(struct journal *j)187{188 for (u64 seq = journal_last_unwritten_seq(j);189 seq <= journal_cur_seq(j);190 seq++) {191 unsigned idx = seq & JOURNAL_BUF_MASK;192 struct journal_buf *w = j->buf + idx;193 194 if (w->write_started && !w->write_allocated)195 break;196 if (w->write_started)197 continue;198 199 if (!journal_state_count(j->reservations, idx)) {200 w->write_started = true;201 closure_call(&w->io, bch2_journal_write, j->wq, NULL);202 }203 204 break;205 }206}207 208/*209 * Final processing when the last reference of a journal buffer has been210 * dropped. Drop the pin list reference acquired at journal entry open and write211 * the buffer, if requested.212 */213void bch2_journal_buf_put_final(struct journal *j, u64 seq)214{215 lockdep_assert_held(&j->lock);216 217 if (__bch2_journal_pin_put(j, seq))218 bch2_journal_reclaim_fast(j);219 bch2_journal_do_writes(j);220}221 222/*223 * Returns true if journal entry is now closed:224 *225 * We don't close a journal_buf until the next journal_buf is finished writing,226 * and can be opened again - this also initializes the next journal_buf:227 */228static void __journal_entry_close(struct journal *j, unsigned closed_val, bool trace)229{230 struct bch_fs *c = container_of(j, struct bch_fs, journal);231 struct journal_buf *buf = journal_cur_buf(j);232 union journal_res_state old, new;233 unsigned sectors;234 235 BUG_ON(closed_val != JOURNAL_ENTRY_CLOSED_VAL &&236 closed_val != JOURNAL_ENTRY_ERROR_VAL);237 238 lockdep_assert_held(&j->lock);239 240 old.v = atomic64_read(&j->reservations.counter);241 do {242 new.v = old.v;243 new.cur_entry_offset = closed_val;244 245 if (old.cur_entry_offset == JOURNAL_ENTRY_ERROR_VAL ||246 old.cur_entry_offset == new.cur_entry_offset)247 return;248 } while (!atomic64_try_cmpxchg(&j->reservations.counter,249 &old.v, new.v));250 251 if (!__journal_entry_is_open(old))252 return;253 254 /* Close out old buffer: */255 buf->data->u64s = cpu_to_le32(old.cur_entry_offset);256 257 if (trace_journal_entry_close_enabled() && trace) {258 struct printbuf pbuf = PRINTBUF;259 pbuf.atomic++;260 261 prt_str(&pbuf, "entry size: ");262 prt_human_readable_u64(&pbuf, vstruct_bytes(buf->data));263 prt_newline(&pbuf);264 bch2_prt_task_backtrace(&pbuf, current, 1, GFP_NOWAIT);265 trace_journal_entry_close(c, pbuf.buf);266 printbuf_exit(&pbuf);267 }268 269 sectors = vstruct_blocks_plus(buf->data, c->block_bits,270 buf->u64s_reserved) << c->block_bits;271 BUG_ON(sectors > buf->sectors);272 buf->sectors = sectors;273 274 /*275 * We have to set last_seq here, _before_ opening a new journal entry:276 *277 * A threads may replace an old pin with a new pin on their current278 * journal reservation - the expectation being that the journal will279 * contain either what the old pin protected or what the new pin280 * protects.281 *282 * After the old pin is dropped journal_last_seq() won't include the old283 * pin, so we can only write the updated last_seq on the entry that284 * contains whatever the new pin protects.285 *286 * Restated, we can _not_ update last_seq for a given entry if there287 * could be a newer entry open with reservations/pins that have been288 * taken against it.289 *290 * Hence, we want update/set last_seq on the current journal entry right291 * before we open a new one:292 */293 buf->last_seq = journal_last_seq(j);294 buf->data->last_seq = cpu_to_le64(buf->last_seq);295 BUG_ON(buf->last_seq > le64_to_cpu(buf->data->seq));296 297 cancel_delayed_work(&j->write_work);298 299 bch2_journal_space_available(j);300 301 __bch2_journal_buf_put(j, old.idx, le64_to_cpu(buf->data->seq));302}303 304void bch2_journal_halt(struct journal *j)305{306 spin_lock(&j->lock);307 __journal_entry_close(j, JOURNAL_ENTRY_ERROR_VAL, true);308 if (!j->err_seq)309 j->err_seq = journal_cur_seq(j);310 journal_wake(j);311 spin_unlock(&j->lock);312}313 314static bool journal_entry_want_write(struct journal *j)315{316 bool ret = !journal_entry_is_open(j) ||317 journal_cur_seq(j) == journal_last_unwritten_seq(j);318 319 /* Don't close it yet if we already have a write in flight: */320 if (ret)321 __journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL, true);322 else if (nr_unwritten_journal_entries(j)) {323 struct journal_buf *buf = journal_cur_buf(j);324 325 if (!buf->flush_time) {326 buf->flush_time = local_clock() ?: 1;327 buf->expires = jiffies;328 }329 }330 331 return ret;332}333 334bool bch2_journal_entry_close(struct journal *j)335{336 bool ret;337 338 spin_lock(&j->lock);339 ret = journal_entry_want_write(j);340 spin_unlock(&j->lock);341 342 return ret;343}344 345/*346 * should _only_ called from journal_res_get() - when we actually want a347 * journal reservation - journal entry is open means journal is dirty:348 */349static int journal_entry_open(struct journal *j)350{351 struct bch_fs *c = container_of(j, struct bch_fs, journal);352 struct journal_buf *buf = j->buf +353 ((journal_cur_seq(j) + 1) & JOURNAL_BUF_MASK);354 union journal_res_state old, new;355 int u64s;356 357 lockdep_assert_held(&j->lock);358 BUG_ON(journal_entry_is_open(j));359 BUG_ON(BCH_SB_CLEAN(c->disk_sb.sb));360 361 if (j->blocked)362 return JOURNAL_ERR_blocked;363 364 if (j->cur_entry_error)365 return j->cur_entry_error;366 367 if (bch2_journal_error(j))368 return JOURNAL_ERR_insufficient_devices; /* -EROFS */369 370 if (!fifo_free(&j->pin))371 return JOURNAL_ERR_journal_pin_full;372 373 if (nr_unwritten_journal_entries(j) == ARRAY_SIZE(j->buf))374 return JOURNAL_ERR_max_in_flight;375 376 BUG_ON(!j->cur_entry_sectors);377 378 buf->expires =379 (journal_cur_seq(j) == j->flushed_seq_ondisk380 ? jiffies381 : j->last_flush_write) +382 msecs_to_jiffies(c->opts.journal_flush_delay);383 384 buf->u64s_reserved = j->entry_u64s_reserved;385 buf->disk_sectors = j->cur_entry_sectors;386 buf->sectors = min(buf->disk_sectors, buf->buf_size >> 9);387 388 u64s = (int) (buf->sectors << 9) / sizeof(u64) -389 journal_entry_overhead(j);390 u64s = clamp_t(int, u64s, 0, JOURNAL_ENTRY_CLOSED_VAL - 1);391 392 if (u64s <= (ssize_t) j->early_journal_entries.nr)393 return JOURNAL_ERR_journal_full;394 395 if (fifo_empty(&j->pin) && j->reclaim_thread)396 wake_up_process(j->reclaim_thread);397 398 /*399 * The fifo_push() needs to happen at the same time as j->seq is400 * incremented for journal_last_seq() to be calculated correctly401 */402 atomic64_inc(&j->seq);403 journal_pin_list_init(fifo_push_ref(&j->pin), 1);404 405 BUG_ON(j->pin.back - 1 != atomic64_read(&j->seq));406 407 BUG_ON(j->buf + (journal_cur_seq(j) & JOURNAL_BUF_MASK) != buf);408 409 bkey_extent_init(&buf->key);410 buf->noflush = false;411 buf->must_flush = false;412 buf->separate_flush = false;413 buf->flush_time = 0;414 buf->need_flush_to_write_buffer = true;415 buf->write_started = false;416 buf->write_allocated = false;417 buf->write_done = false;418 419 memset(buf->data, 0, sizeof(*buf->data));420 buf->data->seq = cpu_to_le64(journal_cur_seq(j));421 buf->data->u64s = 0;422 423 if (j->early_journal_entries.nr) {424 memcpy(buf->data->_data, j->early_journal_entries.data,425 j->early_journal_entries.nr * sizeof(u64));426 le32_add_cpu(&buf->data->u64s, j->early_journal_entries.nr);427 }428 429 /*430 * Must be set before marking the journal entry as open:431 */432 j->cur_entry_u64s = u64s;433 434 old.v = atomic64_read(&j->reservations.counter);435 do {436 new.v = old.v;437 438 BUG_ON(old.cur_entry_offset == JOURNAL_ENTRY_ERROR_VAL);439 440 new.idx++;441 BUG_ON(journal_state_count(new, new.idx));442 BUG_ON(new.idx != (journal_cur_seq(j) & JOURNAL_BUF_MASK));443 444 journal_state_inc(&new);445 446 /* Handle any already added entries */447 new.cur_entry_offset = le32_to_cpu(buf->data->u64s);448 } while (!atomic64_try_cmpxchg(&j->reservations.counter,449 &old.v, new.v));450 451 if (nr_unwritten_journal_entries(j) == 1)452 mod_delayed_work(j->wq,453 &j->write_work,454 msecs_to_jiffies(c->opts.journal_flush_delay));455 journal_wake(j);456 457 if (j->early_journal_entries.nr)458 darray_exit(&j->early_journal_entries);459 return 0;460}461 462static bool journal_quiesced(struct journal *j)463{464 bool ret = atomic64_read(&j->seq) == j->seq_ondisk;465 466 if (!ret)467 bch2_journal_entry_close(j);468 return ret;469}470 471static void journal_quiesce(struct journal *j)472{473 wait_event(j->wait, journal_quiesced(j));474}475 476static void journal_write_work(struct work_struct *work)477{478 struct journal *j = container_of(work, struct journal, write_work.work);479 480 spin_lock(&j->lock);481 if (__journal_entry_is_open(j->reservations)) {482 long delta = journal_cur_buf(j)->expires - jiffies;483 484 if (delta > 0)485 mod_delayed_work(j->wq, &j->write_work, delta);486 else487 __journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL, true);488 }489 spin_unlock(&j->lock);490}491 492static int __journal_res_get(struct journal *j, struct journal_res *res,493 unsigned flags)494{495 struct bch_fs *c = container_of(j, struct bch_fs, journal);496 struct journal_buf *buf;497 bool can_discard;498 int ret;499retry:500 if (journal_res_get_fast(j, res, flags))501 return 0;502 503 if (bch2_journal_error(j))504 return -BCH_ERR_erofs_journal_err;505 506 if (j->blocked)507 return -BCH_ERR_journal_res_get_blocked;508 509 if ((flags & BCH_WATERMARK_MASK) < j->watermark) {510 ret = JOURNAL_ERR_journal_full;511 can_discard = j->can_discard;512 goto out;513 }514 515 if (nr_unwritten_journal_entries(j) == ARRAY_SIZE(j->buf) && !journal_entry_is_open(j)) {516 ret = JOURNAL_ERR_max_in_flight;517 goto out;518 }519 520 spin_lock(&j->lock);521 522 /*523 * Recheck after taking the lock, so we don't race with another thread524 * that just did journal_entry_open() and call bch2_journal_entry_close()525 * unnecessarily526 */527 if (journal_res_get_fast(j, res, flags)) {528 ret = 0;529 goto unlock;530 }531 532 /*533 * If we couldn't get a reservation because the current buf filled up,534 * and we had room for a bigger entry on disk, signal that we want to535 * realloc the journal bufs:536 */537 buf = journal_cur_buf(j);538 if (journal_entry_is_open(j) &&539 buf->buf_size >> 9 < buf->disk_sectors &&540 buf->buf_size < JOURNAL_ENTRY_SIZE_MAX)541 j->buf_size_want = max(j->buf_size_want, buf->buf_size << 1);542 543 __journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL, false);544 ret = journal_entry_open(j) ?: JOURNAL_ERR_retry;545unlock:546 can_discard = j->can_discard;547 spin_unlock(&j->lock);548out:549 if (ret == JOURNAL_ERR_retry)550 goto retry;551 if (!ret)552 return 0;553 554 if (journal_error_check_stuck(j, ret, flags))555 ret = -BCH_ERR_journal_res_get_blocked;556 557 if (ret == JOURNAL_ERR_max_in_flight &&558 track_event_change(&c->times[BCH_TIME_blocked_journal_max_in_flight], true)) {559 560 struct printbuf buf = PRINTBUF;561 prt_printf(&buf, "seq %llu\n", journal_cur_seq(j));562 bch2_journal_bufs_to_text(&buf, j);563 trace_journal_entry_full(c, buf.buf);564 printbuf_exit(&buf);565 count_event(c, journal_entry_full);566 }567 568 /*569 * Journal is full - can't rely on reclaim from work item due to570 * freezing:571 */572 if ((ret == JOURNAL_ERR_journal_full ||573 ret == JOURNAL_ERR_journal_pin_full) &&574 !(flags & JOURNAL_RES_GET_NONBLOCK)) {575 if (can_discard) {576 bch2_journal_do_discards(j);577 goto retry;578 }579 580 if (mutex_trylock(&j->reclaim_lock)) {581 bch2_journal_reclaim(j);582 mutex_unlock(&j->reclaim_lock);583 }584 }585 586 return ret == JOURNAL_ERR_insufficient_devices587 ? -BCH_ERR_erofs_journal_err588 : -BCH_ERR_journal_res_get_blocked;589}590 591/*592 * Essentially the entry function to the journaling code. When bcachefs is doing593 * a btree insert, it calls this function to get the current journal write.594 * Journal write is the structure used set up journal writes. The calling595 * function will then add its keys to the structure, queuing them for the next596 * write.597 *598 * To ensure forward progress, the current task must not be holding any599 * btree node write locks.600 */601int bch2_journal_res_get_slowpath(struct journal *j, struct journal_res *res,602 unsigned flags)603{604 int ret;605 606 if (closure_wait_event_timeout(&j->async_wait,607 (ret = __journal_res_get(j, res, flags)) != -BCH_ERR_journal_res_get_blocked ||608 (flags & JOURNAL_RES_GET_NONBLOCK),609 HZ * 10))610 return ret;611 612 struct bch_fs *c = container_of(j, struct bch_fs, journal);613 struct printbuf buf = PRINTBUF;614 bch2_journal_debug_to_text(&buf, j);615 bch_err(c, "Journal stuck? Waited for 10 seconds...\n%s",616 buf.buf);617 printbuf_exit(&buf);618 619 closure_wait_event(&j->async_wait,620 (ret = __journal_res_get(j, res, flags)) != -BCH_ERR_journal_res_get_blocked ||621 (flags & JOURNAL_RES_GET_NONBLOCK));622 return ret;623}624 625/* journal_entry_res: */626 627void bch2_journal_entry_res_resize(struct journal *j,628 struct journal_entry_res *res,629 unsigned new_u64s)630{631 union journal_res_state state;632 int d = new_u64s - res->u64s;633 634 spin_lock(&j->lock);635 636 j->entry_u64s_reserved += d;637 if (d <= 0)638 goto out;639 640 j->cur_entry_u64s = max_t(int, 0, j->cur_entry_u64s - d);641 smp_mb();642 state = READ_ONCE(j->reservations);643 644 if (state.cur_entry_offset < JOURNAL_ENTRY_CLOSED_VAL &&645 state.cur_entry_offset > j->cur_entry_u64s) {646 j->cur_entry_u64s += d;647 /*648 * Not enough room in current journal entry, have to flush it:649 */650 __journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL, true);651 } else {652 journal_cur_buf(j)->u64s_reserved += d;653 }654out:655 spin_unlock(&j->lock);656 res->u64s += d;657}658 659/* journal flushing: */660 661/**662 * bch2_journal_flush_seq_async - wait for a journal entry to be written663 * @j: journal object664 * @seq: seq to flush665 * @parent: closure object to wait with666 * Returns: 1 if @seq has already been flushed, 0 if @seq is being flushed,667 * -EIO if @seq will never be flushed668 *669 * Like bch2_journal_wait_on_seq, except that it triggers a write immediately if670 * necessary671 */672int bch2_journal_flush_seq_async(struct journal *j, u64 seq,673 struct closure *parent)674{675 struct journal_buf *buf;676 int ret = 0;677 678 if (seq <= j->flushed_seq_ondisk)679 return 1;680 681 spin_lock(&j->lock);682 683 if (WARN_ONCE(seq > journal_cur_seq(j),684 "requested to flush journal seq %llu, but currently at %llu",685 seq, journal_cur_seq(j)))686 goto out;687 688 /* Recheck under lock: */689 if (j->err_seq && seq >= j->err_seq) {690 ret = -EIO;691 goto out;692 }693 694 if (seq <= j->flushed_seq_ondisk) {695 ret = 1;696 goto out;697 }698 699 /* if seq was written, but not flushed - flush a newer one instead */700 seq = max(seq, journal_last_unwritten_seq(j));701 702recheck_need_open:703 if (seq > journal_cur_seq(j)) {704 struct journal_res res = { 0 };705 706 if (journal_entry_is_open(j))707 __journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL, true);708 709 spin_unlock(&j->lock);710 711 /*712 * We're called from bch2_journal_flush_seq() -> wait_event();713 * but this might block. We won't usually block, so we won't714 * livelock:715 */716 sched_annotate_sleep();717 ret = bch2_journal_res_get(j, &res, jset_u64s(0), 0);718 if (ret)719 return ret;720 721 seq = res.seq;722 buf = journal_seq_to_buf(j, seq);723 buf->must_flush = true;724 725 if (!buf->flush_time) {726 buf->flush_time = local_clock() ?: 1;727 buf->expires = jiffies;728 }729 730 if (parent && !closure_wait(&buf->wait, parent))731 BUG();732 733 bch2_journal_res_put(j, &res);734 735 spin_lock(&j->lock);736 goto want_write;737 }738 739 /*740 * if write was kicked off without a flush, or if we promised it741 * wouldn't be a flush, flush the next sequence number instead742 */743 buf = journal_seq_to_buf(j, seq);744 if (buf->noflush) {745 seq++;746 goto recheck_need_open;747 }748 749 buf->must_flush = true;750 751 if (parent && !closure_wait(&buf->wait, parent))752 BUG();753want_write:754 if (seq == journal_cur_seq(j))755 journal_entry_want_write(j);756out:757 spin_unlock(&j->lock);758 return ret;759}760 761int bch2_journal_flush_seq(struct journal *j, u64 seq, unsigned task_state)762{763 u64 start_time = local_clock();764 int ret, ret2;765 766 /*767 * Don't update time_stats when @seq is already flushed:768 */769 if (seq <= j->flushed_seq_ondisk)770 return 0;771 772 ret = wait_event_state(j->wait,773 (ret2 = bch2_journal_flush_seq_async(j, seq, NULL)),774 task_state);775 776 if (!ret)777 bch2_time_stats_update(j->flush_seq_time, start_time);778 779 return ret ?: ret2 < 0 ? ret2 : 0;780}781 782/*783 * bch2_journal_flush_async - if there is an open journal entry, or a journal784 * still being written, write it and wait for the write to complete785 */786void bch2_journal_flush_async(struct journal *j, struct closure *parent)787{788 bch2_journal_flush_seq_async(j, atomic64_read(&j->seq), parent);789}790 791int bch2_journal_flush(struct journal *j)792{793 return bch2_journal_flush_seq(j, atomic64_read(&j->seq), TASK_UNINTERRUPTIBLE);794}795 796/*797 * bch2_journal_noflush_seq - tell the journal not to issue any flushes before798 * @seq799 */800bool bch2_journal_noflush_seq(struct journal *j, u64 seq)801{802 struct bch_fs *c = container_of(j, struct bch_fs, journal);803 u64 unwritten_seq;804 bool ret = false;805 806 if (!(c->sb.features & (1ULL << BCH_FEATURE_journal_no_flush)))807 return false;808 809 if (seq <= c->journal.flushed_seq_ondisk)810 return false;811 812 spin_lock(&j->lock);813 if (seq <= c->journal.flushed_seq_ondisk)814 goto out;815 816 for (unwritten_seq = journal_last_unwritten_seq(j);817 unwritten_seq < seq;818 unwritten_seq++) {819 struct journal_buf *buf = journal_seq_to_buf(j, unwritten_seq);820 821 /* journal flush already in flight, or flush requseted */822 if (buf->must_flush)823 goto out;824 825 buf->noflush = true;826 }827 828 ret = true;829out:830 spin_unlock(&j->lock);831 return ret;832}833 834int bch2_journal_meta(struct journal *j)835{836 struct journal_buf *buf;837 struct journal_res res;838 int ret;839 840 memset(&res, 0, sizeof(res));841 842 ret = bch2_journal_res_get(j, &res, jset_u64s(0), 0);843 if (ret)844 return ret;845 846 buf = j->buf + (res.seq & JOURNAL_BUF_MASK);847 buf->must_flush = true;848 849 if (!buf->flush_time) {850 buf->flush_time = local_clock() ?: 1;851 buf->expires = jiffies;852 }853 854 bch2_journal_res_put(j, &res);855 856 return bch2_journal_flush_seq(j, res.seq, TASK_UNINTERRUPTIBLE);857}858 859/* block/unlock the journal: */860 861void bch2_journal_unblock(struct journal *j)862{863 spin_lock(&j->lock);864 j->blocked--;865 spin_unlock(&j->lock);866 867 journal_wake(j);868}869 870void bch2_journal_block(struct journal *j)871{872 spin_lock(&j->lock);873 j->blocked++;874 spin_unlock(&j->lock);875 876 journal_quiesce(j);877}878 879static struct journal_buf *__bch2_next_write_buffer_flush_journal_buf(struct journal *j, u64 max_seq)880{881 struct journal_buf *ret = NULL;882 883 /* We're inside wait_event(), but using mutex_lock(: */884 sched_annotate_sleep();885 mutex_lock(&j->buf_lock);886 spin_lock(&j->lock);887 max_seq = min(max_seq, journal_cur_seq(j));888 889 for (u64 seq = journal_last_unwritten_seq(j);890 seq <= max_seq;891 seq++) {892 unsigned idx = seq & JOURNAL_BUF_MASK;893 struct journal_buf *buf = j->buf + idx;894 895 if (buf->need_flush_to_write_buffer) {896 if (seq == journal_cur_seq(j))897 __journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL, true);898 899 union journal_res_state s;900 s.v = atomic64_read_acquire(&j->reservations.counter);901 902 ret = journal_state_count(s, idx)903 ? ERR_PTR(-EAGAIN)904 : buf;905 break;906 }907 }908 909 spin_unlock(&j->lock);910 if (IS_ERR_OR_NULL(ret))911 mutex_unlock(&j->buf_lock);912 return ret;913}914 915struct journal_buf *bch2_next_write_buffer_flush_journal_buf(struct journal *j, u64 max_seq)916{917 struct journal_buf *ret;918 919 wait_event(j->wait, (ret = __bch2_next_write_buffer_flush_journal_buf(j, max_seq)) != ERR_PTR(-EAGAIN));920 return ret;921}922 923/* allocate journal on a device: */924 925static int __bch2_set_nr_journal_buckets(struct bch_dev *ca, unsigned nr,926 bool new_fs, struct closure *cl)927{928 struct bch_fs *c = ca->fs;929 struct journal_device *ja = &ca->journal;930 u64 *new_bucket_seq = NULL, *new_buckets = NULL;931 struct open_bucket **ob = NULL;932 long *bu = NULL;933 unsigned i, pos, nr_got = 0, nr_want = nr - ja->nr;934 int ret = 0;935 936 BUG_ON(nr <= ja->nr);937 938 bu = kcalloc(nr_want, sizeof(*bu), GFP_KERNEL);939 ob = kcalloc(nr_want, sizeof(*ob), GFP_KERNEL);940 new_buckets = kcalloc(nr, sizeof(u64), GFP_KERNEL);941 new_bucket_seq = kcalloc(nr, sizeof(u64), GFP_KERNEL);942 if (!bu || !ob || !new_buckets || !new_bucket_seq) {943 ret = -BCH_ERR_ENOMEM_set_nr_journal_buckets;944 goto err_free;945 }946 947 for (nr_got = 0; nr_got < nr_want; nr_got++) {948 if (new_fs) {949 bu[nr_got] = bch2_bucket_alloc_new_fs(ca);950 if (bu[nr_got] < 0) {951 ret = -BCH_ERR_ENOSPC_bucket_alloc;952 break;953 }954 } else {955 ob[nr_got] = bch2_bucket_alloc(c, ca, BCH_WATERMARK_normal,956 BCH_DATA_journal, cl);957 ret = PTR_ERR_OR_ZERO(ob[nr_got]);958 if (ret)959 break;960 961 ret = bch2_trans_run(c,962 bch2_trans_mark_metadata_bucket(trans, ca,963 ob[nr_got]->bucket, BCH_DATA_journal,964 ca->mi.bucket_size, BTREE_TRIGGER_transactional));965 if (ret) {966 bch2_open_bucket_put(c, ob[nr_got]);967 bch_err_msg(c, ret, "marking new journal buckets");968 break;969 }970 971 bu[nr_got] = ob[nr_got]->bucket;972 }973 }974 975 if (!nr_got)976 goto err_free;977 978 /* Don't return an error if we successfully allocated some buckets: */979 ret = 0;980 981 if (c) {982 bch2_journal_flush_all_pins(&c->journal);983 bch2_journal_block(&c->journal);984 mutex_lock(&c->sb_lock);985 }986 987 memcpy(new_buckets, ja->buckets, ja->nr * sizeof(u64));988 memcpy(new_bucket_seq, ja->bucket_seq, ja->nr * sizeof(u64));989 990 BUG_ON(ja->discard_idx > ja->nr);991 992 pos = ja->discard_idx ?: ja->nr;993 994 memmove(new_buckets + pos + nr_got,995 new_buckets + pos,996 sizeof(new_buckets[0]) * (ja->nr - pos));997 memmove(new_bucket_seq + pos + nr_got,998 new_bucket_seq + pos,999 sizeof(new_bucket_seq[0]) * (ja->nr - pos));1000 1001 for (i = 0; i < nr_got; i++) {1002 new_buckets[pos + i] = bu[i];1003 new_bucket_seq[pos + i] = 0;1004 }1005 1006 nr = ja->nr + nr_got;1007 1008 ret = bch2_journal_buckets_to_sb(c, ca, new_buckets, nr);1009 if (ret)1010 goto err_unblock;1011 1012 if (!new_fs)1013 bch2_write_super(c);1014 1015 /* Commit: */1016 if (c)1017 spin_lock(&c->journal.lock);1018 1019 swap(new_buckets, ja->buckets);1020 swap(new_bucket_seq, ja->bucket_seq);1021 ja->nr = nr;1022 1023 if (pos <= ja->discard_idx)1024 ja->discard_idx = (ja->discard_idx + nr_got) % ja->nr;1025 if (pos <= ja->dirty_idx_ondisk)1026 ja->dirty_idx_ondisk = (ja->dirty_idx_ondisk + nr_got) % ja->nr;1027 if (pos <= ja->dirty_idx)1028 ja->dirty_idx = (ja->dirty_idx + nr_got) % ja->nr;1029 if (pos <= ja->cur_idx)1030 ja->cur_idx = (ja->cur_idx + nr_got) % ja->nr;1031 1032 if (c)1033 spin_unlock(&c->journal.lock);1034err_unblock:1035 if (c) {1036 bch2_journal_unblock(&c->journal);1037 mutex_unlock(&c->sb_lock);1038 }1039 1040 if (ret && !new_fs)1041 for (i = 0; i < nr_got; i++)1042 bch2_trans_run(c,1043 bch2_trans_mark_metadata_bucket(trans, ca,1044 bu[i], BCH_DATA_free, 0,1045 BTREE_TRIGGER_transactional));1046err_free:1047 if (!new_fs)1048 for (i = 0; i < nr_got; i++)1049 bch2_open_bucket_put(c, ob[i]);1050 1051 kfree(new_bucket_seq);1052 kfree(new_buckets);1053 kfree(ob);1054 kfree(bu);1055 return ret;1056}1057 1058/*1059 * Allocate more journal space at runtime - not currently making use if it, but1060 * the code works:1061 */1062int bch2_set_nr_journal_buckets(struct bch_fs *c, struct bch_dev *ca,1063 unsigned nr)1064{1065 struct journal_device *ja = &ca->journal;1066 struct closure cl;1067 int ret = 0;1068 1069 closure_init_stack(&cl);1070 1071 down_write(&c->state_lock);1072 1073 /* don't handle reducing nr of buckets yet: */1074 if (nr < ja->nr)1075 goto unlock;1076 1077 while (ja->nr < nr) {1078 struct disk_reservation disk_res = { 0, 0, 0 };1079 1080 /*1081 * note: journal buckets aren't really counted as _sectors_ used yet, so1082 * we don't need the disk reservation to avoid the BUG_ON() in buckets.c1083 * when space used goes up without a reservation - but we do need the1084 * reservation to ensure we'll actually be able to allocate:1085 *1086 * XXX: that's not right, disk reservations only ensure a1087 * filesystem-wide allocation will succeed, this is a device1088 * specific allocation - we can hang here:1089 */1090 1091 ret = bch2_disk_reservation_get(c, &disk_res,1092 bucket_to_sector(ca, nr - ja->nr), 1, 0);1093 if (ret)1094 break;1095 1096 ret = __bch2_set_nr_journal_buckets(ca, nr, false, &cl);1097 1098 bch2_disk_reservation_put(c, &disk_res);1099 1100 closure_sync(&cl);1101 1102 if (ret && ret != -BCH_ERR_bucket_alloc_blocked)1103 break;1104 }1105 1106 bch_err_fn(c, ret);1107unlock:1108 up_write(&c->state_lock);1109 return ret;1110}1111 1112int bch2_dev_journal_alloc(struct bch_dev *ca, bool new_fs)1113{1114 unsigned nr;1115 int ret;1116 1117 if (dynamic_fault("bcachefs:add:journal_alloc")) {1118 ret = -BCH_ERR_ENOMEM_set_nr_journal_buckets;1119 goto err;1120 }1121 1122 /* 1/128th of the device by default: */1123 nr = ca->mi.nbuckets >> 7;1124 1125 /*1126 * clamp journal size to 8192 buckets or 8GB (in sectors), whichever1127 * is smaller:1128 */1129 nr = clamp_t(unsigned, nr,1130 BCH_JOURNAL_BUCKETS_MIN,1131 min(1 << 13,1132 (1 << 24) / ca->mi.bucket_size));1133 1134 ret = __bch2_set_nr_journal_buckets(ca, nr, new_fs, NULL);1135err:1136 bch_err_fn(ca, ret);1137 return ret;1138}1139 1140int bch2_fs_journal_alloc(struct bch_fs *c)1141{1142 for_each_online_member(c, ca) {1143 if (ca->journal.nr)1144 continue;1145 1146 int ret = bch2_dev_journal_alloc(ca, true);1147 if (ret) {1148 percpu_ref_put(&ca->io_ref);1149 return ret;1150 }1151 }1152 1153 return 0;1154}1155 1156/* startup/shutdown: */1157 1158static bool bch2_journal_writing_to_device(struct journal *j, unsigned dev_idx)1159{1160 bool ret = false;1161 u64 seq;1162 1163 spin_lock(&j->lock);1164 for (seq = journal_last_unwritten_seq(j);1165 seq <= journal_cur_seq(j) && !ret;1166 seq++) {1167 struct journal_buf *buf = journal_seq_to_buf(j, seq);1168 1169 if (bch2_bkey_has_device_c(bkey_i_to_s_c(&buf->key), dev_idx))1170 ret = true;1171 }1172 spin_unlock(&j->lock);1173 1174 return ret;1175}1176 1177void bch2_dev_journal_stop(struct journal *j, struct bch_dev *ca)1178{1179 wait_event(j->wait, !bch2_journal_writing_to_device(j, ca->dev_idx));1180}1181 1182void bch2_fs_journal_stop(struct journal *j)1183{1184 if (!test_bit(JOURNAL_running, &j->flags))1185 return;1186 1187 bch2_journal_reclaim_stop(j);1188 bch2_journal_flush_all_pins(j);1189 1190 wait_event(j->wait, bch2_journal_entry_close(j));1191 1192 /*1193 * Always write a new journal entry, to make sure the clock hands are up1194 * to date (and match the superblock)1195 */1196 bch2_journal_meta(j);1197 1198 journal_quiesce(j);1199 cancel_delayed_work_sync(&j->write_work);1200 1201 WARN(!bch2_journal_error(j) &&1202 test_bit(JOURNAL_replay_done, &j->flags) &&1203 j->last_empty_seq != journal_cur_seq(j),1204 "journal shutdown error: cur seq %llu but last empty seq %llu",1205 journal_cur_seq(j), j->last_empty_seq);1206 1207 if (!bch2_journal_error(j))1208 clear_bit(JOURNAL_running, &j->flags);1209}1210 1211int bch2_fs_journal_start(struct journal *j, u64 cur_seq)1212{1213 struct bch_fs *c = container_of(j, struct bch_fs, journal);1214 struct journal_entry_pin_list *p;1215 struct journal_replay *i, **_i;1216 struct genradix_iter iter;1217 bool had_entries = false;1218 u64 last_seq = cur_seq, nr, seq;1219 1220 genradix_for_each_reverse(&c->journal_entries, iter, _i) {1221 i = *_i;1222 1223 if (journal_replay_ignore(i))1224 continue;1225 1226 last_seq = le64_to_cpu(i->j.last_seq);1227 break;1228 }1229 1230 nr = cur_seq - last_seq;1231 1232 if (nr + 1 > j->pin.size) {1233 free_fifo(&j->pin);1234 init_fifo(&j->pin, roundup_pow_of_two(nr + 1), GFP_KERNEL);1235 if (!j->pin.data) {1236 bch_err(c, "error reallocating journal fifo (%llu open entries)", nr);1237 return -BCH_ERR_ENOMEM_journal_pin_fifo;1238 }1239 }1240 1241 j->replay_journal_seq = last_seq;1242 j->replay_journal_seq_end = cur_seq;1243 j->last_seq_ondisk = last_seq;1244 j->flushed_seq_ondisk = cur_seq - 1;1245 j->seq_ondisk = cur_seq - 1;1246 j->pin.front = last_seq;1247 j->pin.back = cur_seq;1248 atomic64_set(&j->seq, cur_seq - 1);1249 1250 fifo_for_each_entry_ptr(p, &j->pin, seq)1251 journal_pin_list_init(p, 1);1252 1253 genradix_for_each(&c->journal_entries, iter, _i) {1254 i = *_i;1255 1256 if (journal_replay_ignore(i))1257 continue;1258 1259 seq = le64_to_cpu(i->j.seq);1260 BUG_ON(seq >= cur_seq);1261 1262 if (seq < last_seq)1263 continue;1264 1265 if (journal_entry_empty(&i->j))1266 j->last_empty_seq = le64_to_cpu(i->j.seq);1267 1268 p = journal_seq_pin(j, seq);1269 1270 p->devs.nr = 0;1271 darray_for_each(i->ptrs, ptr)1272 bch2_dev_list_add_dev(&p->devs, ptr->dev);1273 1274 had_entries = true;1275 }1276 1277 if (!had_entries)1278 j->last_empty_seq = cur_seq - 1; /* to match j->seq */1279 1280 spin_lock(&j->lock);1281 1282 set_bit(JOURNAL_running, &j->flags);1283 j->last_flush_write = jiffies;1284 1285 j->reservations.idx = j->reservations.unwritten_idx = journal_cur_seq(j);1286 j->reservations.unwritten_idx++;1287 1288 c->last_bucket_seq_cleanup = journal_cur_seq(j);1289 1290 bch2_journal_space_available(j);1291 spin_unlock(&j->lock);1292 1293 return bch2_journal_reclaim_start(j);1294}1295 1296/* init/exit: */1297 1298void bch2_dev_journal_exit(struct bch_dev *ca)1299{1300 struct journal_device *ja = &ca->journal;1301 1302 for (unsigned i = 0; i < ARRAY_SIZE(ja->bio); i++) {1303 kfree(ja->bio[i]);1304 ja->bio[i] = NULL;1305 }1306 1307 kfree(ja->buckets);1308 kfree(ja->bucket_seq);1309 ja->buckets = NULL;1310 ja->bucket_seq = NULL;1311}1312 1313int bch2_dev_journal_init(struct bch_dev *ca, struct bch_sb *sb)1314{1315 struct journal_device *ja = &ca->journal;1316 struct bch_sb_field_journal *journal_buckets =1317 bch2_sb_field_get(sb, journal);1318 struct bch_sb_field_journal_v2 *journal_buckets_v2 =1319 bch2_sb_field_get(sb, journal_v2);1320 1321 ja->nr = 0;1322 1323 if (journal_buckets_v2) {1324 unsigned nr = bch2_sb_field_journal_v2_nr_entries(journal_buckets_v2);1325 1326 for (unsigned i = 0; i < nr; i++)1327 ja->nr += le64_to_cpu(journal_buckets_v2->d[i].nr);1328 } else if (journal_buckets) {1329 ja->nr = bch2_nr_journal_buckets(journal_buckets);1330 }1331 1332 ja->bucket_seq = kcalloc(ja->nr, sizeof(u64), GFP_KERNEL);1333 if (!ja->bucket_seq)1334 return -BCH_ERR_ENOMEM_dev_journal_init;1335 1336 unsigned nr_bvecs = DIV_ROUND_UP(JOURNAL_ENTRY_SIZE_MAX, PAGE_SIZE);1337 1338 for (unsigned i = 0; i < ARRAY_SIZE(ja->bio); i++) {1339 ja->bio[i] = kmalloc(struct_size(ja->bio[i], bio.bi_inline_vecs,1340 nr_bvecs), GFP_KERNEL);1341 if (!ja->bio[i])1342 return -BCH_ERR_ENOMEM_dev_journal_init;1343 1344 ja->bio[i]->ca = ca;1345 ja->bio[i]->buf_idx = i;1346 bio_init(&ja->bio[i]->bio, NULL, ja->bio[i]->bio.bi_inline_vecs, nr_bvecs, 0);1347 }1348 1349 ja->buckets = kcalloc(ja->nr, sizeof(u64), GFP_KERNEL);1350 if (!ja->buckets)1351 return -BCH_ERR_ENOMEM_dev_journal_init;1352 1353 if (journal_buckets_v2) {1354 unsigned nr = bch2_sb_field_journal_v2_nr_entries(journal_buckets_v2);1355 unsigned dst = 0;1356 1357 for (unsigned i = 0; i < nr; i++)1358 for (unsigned j = 0; j < le64_to_cpu(journal_buckets_v2->d[i].nr); j++)1359 ja->buckets[dst++] =1360 le64_to_cpu(journal_buckets_v2->d[i].start) + j;1361 } else if (journal_buckets) {1362 for (unsigned i = 0; i < ja->nr; i++)1363 ja->buckets[i] = le64_to_cpu(journal_buckets->buckets[i]);1364 }1365 1366 return 0;1367}1368 1369void bch2_fs_journal_exit(struct journal *j)1370{1371 if (j->wq)1372 destroy_workqueue(j->wq);1373 1374 darray_exit(&j->early_journal_entries);1375 1376 for (unsigned i = 0; i < ARRAY_SIZE(j->buf); i++)1377 kvfree(j->buf[i].data);1378 free_fifo(&j->pin);1379}1380 1381int bch2_fs_journal_init(struct journal *j)1382{1383 static struct lock_class_key res_key;1384 1385 mutex_init(&j->buf_lock);1386 spin_lock_init(&j->lock);1387 spin_lock_init(&j->err_lock);1388 init_waitqueue_head(&j->wait);1389 INIT_DELAYED_WORK(&j->write_work, journal_write_work);1390 init_waitqueue_head(&j->reclaim_wait);1391 init_waitqueue_head(&j->pin_flush_wait);1392 mutex_init(&j->reclaim_lock);1393 mutex_init(&j->discard_lock);1394 1395 lockdep_init_map(&j->res_map, "journal res", &res_key, 0);1396 1397 atomic64_set(&j->reservations.counter,1398 ((union journal_res_state)1399 { .cur_entry_offset = JOURNAL_ENTRY_CLOSED_VAL }).v);1400 1401 if (!(init_fifo(&j->pin, JOURNAL_PIN, GFP_KERNEL)))1402 return -BCH_ERR_ENOMEM_journal_pin_fifo;1403 1404 for (unsigned i = 0; i < ARRAY_SIZE(j->buf); i++) {1405 j->buf[i].buf_size = JOURNAL_ENTRY_SIZE_MIN;1406 j->buf[i].data = kvmalloc(j->buf[i].buf_size, GFP_KERNEL);1407 if (!j->buf[i].data)1408 return -BCH_ERR_ENOMEM_journal_buf;1409 j->buf[i].idx = i;1410 }1411 1412 j->pin.front = j->pin.back = 1;1413 1414 j->wq = alloc_workqueue("bcachefs_journal",1415 WQ_HIGHPRI|WQ_FREEZABLE|WQ_UNBOUND|WQ_MEM_RECLAIM, 512);1416 if (!j->wq)1417 return -BCH_ERR_ENOMEM_fs_other_alloc;1418 return 0;1419}1420 1421/* debug: */1422 1423static const char * const bch2_journal_flags_strs[] = {1424#define x(n) #n,1425 JOURNAL_FLAGS()1426#undef x1427 NULL1428};1429 1430void __bch2_journal_debug_to_text(struct printbuf *out, struct journal *j)1431{1432 struct bch_fs *c = container_of(j, struct bch_fs, journal);1433 union journal_res_state s;1434 unsigned long now = jiffies;1435 u64 nr_writes = j->nr_flush_writes + j->nr_noflush_writes;1436 1437 printbuf_tabstops_reset(out);1438 printbuf_tabstop_push(out, 28);1439 out->atomic++;1440 1441 rcu_read_lock();1442 s = READ_ONCE(j->reservations);1443 1444 prt_printf(out, "flags:\t");1445 prt_bitflags(out, bch2_journal_flags_strs, j->flags);1446 prt_newline(out);1447 prt_printf(out, "dirty journal entries:\t%llu/%llu\n", fifo_used(&j->pin), j->pin.size);1448 prt_printf(out, "seq:\t%llu\n", journal_cur_seq(j));1449 prt_printf(out, "seq_ondisk:\t%llu\n", j->seq_ondisk);1450 prt_printf(out, "last_seq:\t%llu\n", journal_last_seq(j));1451 prt_printf(out, "last_seq_ondisk:\t%llu\n", j->last_seq_ondisk);1452 prt_printf(out, "flushed_seq_ondisk:\t%llu\n", j->flushed_seq_ondisk);1453 prt_printf(out, "watermark:\t%s\n", bch2_watermarks[j->watermark]);1454 prt_printf(out, "each entry reserved:\t%u\n", j->entry_u64s_reserved);1455 prt_printf(out, "nr flush writes:\t%llu\n", j->nr_flush_writes);1456 prt_printf(out, "nr noflush writes:\t%llu\n", j->nr_noflush_writes);1457 prt_printf(out, "average write size:\t");1458 prt_human_readable_u64(out, nr_writes ? div64_u64(j->entry_bytes_written, nr_writes) : 0);1459 prt_newline(out);1460 prt_printf(out, "nr direct reclaim:\t%llu\n", j->nr_direct_reclaim);1461 prt_printf(out, "nr background reclaim:\t%llu\n", j->nr_background_reclaim);1462 prt_printf(out, "reclaim kicked:\t%u\n", j->reclaim_kicked);1463 prt_printf(out, "reclaim runs in:\t%u ms\n", time_after(j->next_reclaim, now)1464 ? jiffies_to_msecs(j->next_reclaim - jiffies) : 0);1465 prt_printf(out, "blocked:\t%u\n", j->blocked);1466 prt_printf(out, "current entry sectors:\t%u\n", j->cur_entry_sectors);1467 prt_printf(out, "current entry error:\t%s\n", bch2_journal_errors[j->cur_entry_error]);1468 prt_printf(out, "current entry:\t");1469 1470 switch (s.cur_entry_offset) {1471 case JOURNAL_ENTRY_ERROR_VAL:1472 prt_printf(out, "error\n");1473 break;1474 case JOURNAL_ENTRY_CLOSED_VAL:1475 prt_printf(out, "closed\n");1476 break;1477 default:1478 prt_printf(out, "%u/%u\n", s.cur_entry_offset, j->cur_entry_u64s);1479 break;1480 }1481 1482 prt_printf(out, "unwritten entries:\n");1483 bch2_journal_bufs_to_text(out, j);1484 1485 prt_printf(out, "space:\n");1486 printbuf_indent_add(out, 2);1487 prt_printf(out, "discarded\t%u:%u\n",1488 j->space[journal_space_discarded].next_entry,1489 j->space[journal_space_discarded].total);1490 prt_printf(out, "clean ondisk\t%u:%u\n",1491 j->space[journal_space_clean_ondisk].next_entry,1492 j->space[journal_space_clean_ondisk].total);1493 prt_printf(out, "clean\t%u:%u\n",1494 j->space[journal_space_clean].next_entry,1495 j->space[journal_space_clean].total);1496 prt_printf(out, "total\t%u:%u\n",1497 j->space[journal_space_total].next_entry,1498 j->space[journal_space_total].total);1499 printbuf_indent_sub(out, 2);1500 1501 for_each_member_device_rcu(c, ca, &c->rw_devs[BCH_DATA_journal]) {1502 struct journal_device *ja = &ca->journal;1503 1504 if (!test_bit(ca->dev_idx, c->rw_devs[BCH_DATA_journal].d))1505 continue;1506 1507 if (!ja->nr)1508 continue;1509 1510 prt_printf(out, "dev %u:\n", ca->dev_idx);1511 printbuf_indent_add(out, 2);1512 prt_printf(out, "nr\t%u\n", ja->nr);1513 prt_printf(out, "bucket size\t%u\n", ca->mi.bucket_size);1514 prt_printf(out, "available\t%u:%u\n", bch2_journal_dev_buckets_available(j, ja, journal_space_discarded), ja->sectors_free);1515 prt_printf(out, "discard_idx\t%u\n", ja->discard_idx);1516 prt_printf(out, "dirty_ondisk\t%u (seq %llu)\n",ja->dirty_idx_ondisk, ja->bucket_seq[ja->dirty_idx_ondisk]);1517 prt_printf(out, "dirty_idx\t%u (seq %llu)\n", ja->dirty_idx, ja->bucket_seq[ja->dirty_idx]);1518 prt_printf(out, "cur_idx\t%u (seq %llu)\n", ja->cur_idx, ja->bucket_seq[ja->cur_idx]);1519 printbuf_indent_sub(out, 2);1520 }1521 1522 rcu_read_unlock();1523 1524 --out->atomic;1525}1526 1527void bch2_journal_debug_to_text(struct printbuf *out, struct journal *j)1528{1529 spin_lock(&j->lock);1530 __bch2_journal_debug_to_text(out, j);1531 spin_unlock(&j->lock);1532}1533 1534bool bch2_journal_seq_pins_to_text(struct printbuf *out, struct journal *j, u64 *seq)1535{1536 struct journal_entry_pin_list *pin_list;1537 struct journal_entry_pin *pin;1538 1539 spin_lock(&j->lock);1540 if (!test_bit(JOURNAL_running, &j->flags)) {1541 spin_unlock(&j->lock);1542 return true;1543 }1544 1545 *seq = max(*seq, j->pin.front);1546 1547 if (*seq >= j->pin.back) {1548 spin_unlock(&j->lock);1549 return true;1550 }1551 1552 out->atomic++;1553 1554 pin_list = journal_seq_pin(j, *seq);1555 1556 prt_printf(out, "%llu: count %u\n", *seq, atomic_read(&pin_list->count));1557 printbuf_indent_add(out, 2);1558 1559 for (unsigned i = 0; i < ARRAY_SIZE(pin_list->list); i++)1560 list_for_each_entry(pin, &pin_list->list[i], list)1561 prt_printf(out, "\t%px %ps\n", pin, pin->flush);1562 1563 if (!list_empty(&pin_list->flushed))1564 prt_printf(out, "flushed:\n");1565 1566 list_for_each_entry(pin, &pin_list->flushed, list)1567 prt_printf(out, "\t%px %ps\n", pin, pin->flush);1568 1569 printbuf_indent_sub(out, 2);1570 1571 --out->atomic;1572 spin_unlock(&j->lock);1573 1574 return false;1575}1576 1577void bch2_journal_pins_to_text(struct printbuf *out, struct journal *j)1578{1579 u64 seq = 0;1580 1581 while (!bch2_journal_seq_pins_to_text(out, j, &seq))1582 seq++;1583}1584