--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * bcachefs journalling code, for btree insertions
+ *
+ * Copyright 2012 Google, Inc.
+ */
+
+#include "bcachefs.h"
+#include "alloc_foreground.h"
+#include "bkey_methods.h"
+#include "btree_gc.h"
+#include "btree_update.h"
+#include "btree_write_buffer.h"
+#include "buckets.h"
+#include "error.h"
+#include "journal.h"
+#include "journal_io.h"
+#include "journal_reclaim.h"
+#include "journal_sb.h"
+#include "journal_seq_blacklist.h"
+#include "trace.h"
+
+static const char * const bch2_journal_errors[] = {
+#define x(n) #n,
+ JOURNAL_ERRORS()
+#undef x
+ NULL
+};
+
+static inline bool journal_seq_unwritten(struct journal *j, u64 seq)
+{
+ return seq > j->seq_ondisk;
+}
+
+static bool __journal_entry_is_open(union journal_res_state state)
+{
+ return state.cur_entry_offset < JOURNAL_ENTRY_CLOSED_VAL;
+}
+
+static inline unsigned nr_unwritten_journal_entries(struct journal *j)
+{
+ return atomic64_read(&j->seq) - j->seq_ondisk;
+}
+
+static bool journal_entry_is_open(struct journal *j)
+{
+ return __journal_entry_is_open(j->reservations);
+}
+
+static inline struct journal_buf *
+journal_seq_to_buf(struct journal *j, u64 seq)
+{
+ struct journal_buf *buf = NULL;
+
+ EBUG_ON(seq > journal_cur_seq(j));
+
+ if (journal_seq_unwritten(j, seq)) {
+ buf = j->buf + (seq & JOURNAL_BUF_MASK);
+ EBUG_ON(le64_to_cpu(buf->data->seq) != seq);
+ }
+ return buf;
+}
+
+static void journal_pin_list_init(struct journal_entry_pin_list *p, int count)
+{
+ unsigned i;
+
+ for (i = 0; i < ARRAY_SIZE(p->list); i++)
+ INIT_LIST_HEAD(&p->list[i]);
+ INIT_LIST_HEAD(&p->flushed);
+ atomic_set(&p->count, count);
+ p->devs.nr = 0;
+}
+
+/*
+ * Detect stuck journal conditions and trigger shutdown. Technically the journal
+ * can end up stuck for a variety of reasons, such as a blocked I/O, journal
+ * reservation lockup, etc. Since this is a fatal error with potentially
+ * unpredictable characteristics, we want to be fairly conservative before we
+ * decide to shut things down.
+ *
+ * Consider the journal stuck when it appears full with no ability to commit
+ * btree transactions, to discard journal buckets, nor acquire priority
+ * (reserved watermark) reservation.
+ */
+static inline bool
+journal_error_check_stuck(struct journal *j, int error, unsigned flags)
+{
+ struct bch_fs *c = container_of(j, struct bch_fs, journal);
+ bool stuck = false;
+ struct printbuf buf = PRINTBUF;
+
+ if (!(error == JOURNAL_ERR_journal_full ||
+ error == JOURNAL_ERR_journal_pin_full) ||
+ nr_unwritten_journal_entries(j) ||
+ (flags & BCH_WATERMARK_MASK) != BCH_WATERMARK_reclaim)
+ return stuck;
+
+ spin_lock(&j->lock);
+
+ if (j->can_discard) {
+ spin_unlock(&j->lock);
+ return stuck;
+ }
+
+ stuck = true;
+
+ /*
+ * The journal shutdown path will set ->err_seq, but do it here first to
+ * serialize against concurrent failures and avoid duplicate error
+ * reports.
+ */
+ if (j->err_seq) {
+ spin_unlock(&j->lock);
+ return stuck;
+ }
+ j->err_seq = journal_cur_seq(j);
+ spin_unlock(&j->lock);
+
+ bch_err(c, "Journal stuck! Hava a pre-reservation but journal full (error %s)",
+ bch2_journal_errors[error]);
+ bch2_journal_debug_to_text(&buf, j);
+ bch_err(c, "%s", buf.buf);
+
+ printbuf_reset(&buf);
+ bch2_journal_pins_to_text(&buf, j);
+ bch_err(c, "Journal pins:\n%s", buf.buf);
+ printbuf_exit(&buf);
+
+ bch2_fatal_error(c);
+ dump_stack();
+
+ return stuck;
+}
+
+/*
+ * Final processing when the last reference of a journal buffer has been
+ * dropped. Drop the pin list reference acquired at journal entry open and write
+ * the buffer, if requested.
+ */
+void bch2_journal_buf_put_final(struct journal *j, u64 seq, bool write)
+{
+ struct bch_fs *c = container_of(j, struct bch_fs, journal);
+
+ lockdep_assert_held(&j->lock);
+
+ if (__bch2_journal_pin_put(j, seq))
+ bch2_journal_reclaim_fast(j);
+ if (write)
+ closure_call(&j->io, bch2_journal_write, c->io_complete_wq, NULL);
+}
+
+/*
+ * Returns true if journal entry is now closed:
+ *
+ * We don't close a journal_buf until the next journal_buf is finished writing,
+ * and can be opened again - this also initializes the next journal_buf:
+ */
+static void __journal_entry_close(struct journal *j, unsigned closed_val)
+{
+ struct bch_fs *c = container_of(j, struct bch_fs, journal);
+ struct journal_buf *buf = journal_cur_buf(j);
+ union journal_res_state old, new;
+ u64 v = atomic64_read(&j->reservations.counter);
+ unsigned sectors;
+
+ BUG_ON(closed_val != JOURNAL_ENTRY_CLOSED_VAL &&
+ closed_val != JOURNAL_ENTRY_ERROR_VAL);
+
+ lockdep_assert_held(&j->lock);
+
+ do {
+ old.v = new.v = v;
+ new.cur_entry_offset = closed_val;
+
+ if (old.cur_entry_offset == JOURNAL_ENTRY_ERROR_VAL ||
+ old.cur_entry_offset == new.cur_entry_offset)
+ return;
+ } while ((v = atomic64_cmpxchg(&j->reservations.counter,
+ old.v, new.v)) != old.v);
+
+ if (!__journal_entry_is_open(old))
+ return;
+
+ /* Close out old buffer: */
+ buf->data->u64s = cpu_to_le32(old.cur_entry_offset);
+
+ trace_journal_entry_close(c, vstruct_bytes(buf->data));
+
+ sectors = vstruct_blocks_plus(buf->data, c->block_bits,
+ buf->u64s_reserved) << c->block_bits;
+ BUG_ON(sectors > buf->sectors);
+ buf->sectors = sectors;
+
+ /*
+ * We have to set last_seq here, _before_ opening a new journal entry:
+ *
+ * A threads may replace an old pin with a new pin on their current
+ * journal reservation - the expectation being that the journal will
+ * contain either what the old pin protected or what the new pin
+ * protects.
+ *
+ * After the old pin is dropped journal_last_seq() won't include the old
+ * pin, so we can only write the updated last_seq on the entry that
+ * contains whatever the new pin protects.
+ *
+ * Restated, we can _not_ update last_seq for a given entry if there
+ * could be a newer entry open with reservations/pins that have been
+ * taken against it.
+ *
+ * Hence, we want update/set last_seq on the current journal entry right
+ * before we open a new one:
+ */
+ buf->last_seq = journal_last_seq(j);
+ buf->data->last_seq = cpu_to_le64(buf->last_seq);
+ BUG_ON(buf->last_seq > le64_to_cpu(buf->data->seq));
+
+ cancel_delayed_work(&j->write_work);
+
+ bch2_journal_space_available(j);
+
+ __bch2_journal_buf_put(j, old.idx, le64_to_cpu(buf->data->seq));
+}
+
+void bch2_journal_halt(struct journal *j)
+{
+ spin_lock(&j->lock);
+ __journal_entry_close(j, JOURNAL_ENTRY_ERROR_VAL);
+ if (!j->err_seq)
+ j->err_seq = journal_cur_seq(j);
+ journal_wake(j);
+ spin_unlock(&j->lock);
+}
+
+static bool journal_entry_want_write(struct journal *j)
+{
+ bool ret = !journal_entry_is_open(j) ||
+ journal_cur_seq(j) == journal_last_unwritten_seq(j);
+
+ /* Don't close it yet if we already have a write in flight: */
+ if (ret)
+ __journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL);
+ else if (nr_unwritten_journal_entries(j)) {
+ struct journal_buf *buf = journal_cur_buf(j);
+
+ if (!buf->flush_time) {
+ buf->flush_time = local_clock() ?: 1;
+ buf->expires = jiffies;
+ }
+ }
+
+ return ret;
+}
+
+bool bch2_journal_entry_close(struct journal *j)
+{
+ bool ret;
+
+ spin_lock(&j->lock);
+ ret = journal_entry_want_write(j);
+ spin_unlock(&j->lock);
+
+ return ret;
+}
+
+/*
+ * should _only_ called from journal_res_get() - when we actually want a
+ * journal reservation - journal entry is open means journal is dirty:
+ */
+static int journal_entry_open(struct journal *j)
+{
+ struct bch_fs *c = container_of(j, struct bch_fs, journal);
+ struct journal_buf *buf = j->buf +
+ ((journal_cur_seq(j) + 1) & JOURNAL_BUF_MASK);
+ union journal_res_state old, new;
+ int u64s;
+ u64 v;
+
+ lockdep_assert_held(&j->lock);
+ BUG_ON(journal_entry_is_open(j));
+ BUG_ON(BCH_SB_CLEAN(c->disk_sb.sb));
+
+ if (j->blocked)
+ return JOURNAL_ERR_blocked;
+
+ if (j->cur_entry_error)
+ return j->cur_entry_error;
+
+ if (bch2_journal_error(j))
+ return JOURNAL_ERR_insufficient_devices; /* -EROFS */
+
+ if (!fifo_free(&j->pin))
+ return JOURNAL_ERR_journal_pin_full;
+
+ if (nr_unwritten_journal_entries(j) == ARRAY_SIZE(j->buf))
+ return JOURNAL_ERR_max_in_flight;
+
+ BUG_ON(!j->cur_entry_sectors);
+
+ buf->expires =
+ (journal_cur_seq(j) == j->flushed_seq_ondisk
+ ? jiffies
+ : j->last_flush_write) +
+ msecs_to_jiffies(c->opts.journal_flush_delay);
+
+ buf->u64s_reserved = j->entry_u64s_reserved;
+ buf->disk_sectors = j->cur_entry_sectors;
+ buf->sectors = min(buf->disk_sectors, buf->buf_size >> 9);
+
+ u64s = (int) (buf->sectors << 9) / sizeof(u64) -
+ journal_entry_overhead(j);
+ u64s = clamp_t(int, u64s, 0, JOURNAL_ENTRY_CLOSED_VAL - 1);
+
+ if (u64s <= (ssize_t) j->early_journal_entries.nr)
+ return JOURNAL_ERR_journal_full;
+
+ if (fifo_empty(&j->pin) && j->reclaim_thread)
+ wake_up_process(j->reclaim_thread);
+
+ /*
+ * The fifo_push() needs to happen at the same time as j->seq is
+ * incremented for journal_last_seq() to be calculated correctly
+ */
+ atomic64_inc(&j->seq);
+ journal_pin_list_init(fifo_push_ref(&j->pin), 1);
+
+ BUG_ON(j->pin.back - 1 != atomic64_read(&j->seq));
+
+ BUG_ON(j->buf + (journal_cur_seq(j) & JOURNAL_BUF_MASK) != buf);
+
+ bkey_extent_init(&buf->key);
+ buf->noflush = false;
+ buf->must_flush = false;
+ buf->separate_flush = false;
+ buf->flush_time = 0;
+ buf->need_flush_to_write_buffer = true;
+
+ memset(buf->data, 0, sizeof(*buf->data));
+ buf->data->seq = cpu_to_le64(journal_cur_seq(j));
+ buf->data->u64s = 0;
+
+ if (j->early_journal_entries.nr) {
+ memcpy(buf->data->_data, j->early_journal_entries.data,
+ j->early_journal_entries.nr * sizeof(u64));
+ le32_add_cpu(&buf->data->u64s, j->early_journal_entries.nr);
+ }
+
+ /*
+ * Must be set before marking the journal entry as open:
+ */
+ j->cur_entry_u64s = u64s;
+
+ v = atomic64_read(&j->reservations.counter);
+ do {
+ old.v = new.v = v;
+
+ BUG_ON(old.cur_entry_offset == JOURNAL_ENTRY_ERROR_VAL);
+
+ new.idx++;
+ BUG_ON(journal_state_count(new, new.idx));
+ BUG_ON(new.idx != (journal_cur_seq(j) & JOURNAL_BUF_MASK));
+
+ journal_state_inc(&new);
+
+ /* Handle any already added entries */
+ new.cur_entry_offset = le32_to_cpu(buf->data->u64s);
+ } while ((v = atomic64_cmpxchg(&j->reservations.counter,
+ old.v, new.v)) != old.v);
+
+ mod_delayed_work(c->io_complete_wq,
+ &j->write_work,
+ msecs_to_jiffies(c->opts.journal_flush_delay));
+ journal_wake(j);
+
+ if (j->early_journal_entries.nr)
+ darray_exit(&j->early_journal_entries);
+ return 0;
+}
+
+static bool journal_quiesced(struct journal *j)
+{
+ bool ret = atomic64_read(&j->seq) == j->seq_ondisk;
+
+ if (!ret)
+ bch2_journal_entry_close(j);
+ return ret;
+}
+
+static void journal_quiesce(struct journal *j)
+{
+ wait_event(j->wait, journal_quiesced(j));
+}
+
+static void journal_write_work(struct work_struct *work)
+{
+ struct journal *j = container_of(work, struct journal, write_work.work);
+ struct bch_fs *c = container_of(j, struct bch_fs, journal);
+ long delta;
+
+ spin_lock(&j->lock);
+ if (!__journal_entry_is_open(j->reservations))
+ goto unlock;
+
+ delta = journal_cur_buf(j)->expires - jiffies;
+
+ if (delta > 0)
+ mod_delayed_work(c->io_complete_wq, &j->write_work, delta);
+ else
+ __journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL);
+unlock:
+ spin_unlock(&j->lock);
+}
+
+static int __journal_res_get(struct journal *j, struct journal_res *res,
+ unsigned flags)
+{
+ struct bch_fs *c = container_of(j, struct bch_fs, journal);
+ struct journal_buf *buf;
+ bool can_discard;
+ int ret;
+retry:
+ if (journal_res_get_fast(j, res, flags))
+ return 0;
+
+ if (bch2_journal_error(j))
+ return -BCH_ERR_erofs_journal_err;
+
+ spin_lock(&j->lock);
+
+ /* check once more in case somebody else shut things down... */
+ if (bch2_journal_error(j)) {
+ spin_unlock(&j->lock);
+ return -BCH_ERR_erofs_journal_err;
+ }
+
+ /*
+ * Recheck after taking the lock, so we don't race with another thread
+ * that just did journal_entry_open() and call bch2_journal_entry_close()
+ * unnecessarily
+ */
+ if (journal_res_get_fast(j, res, flags)) {
+ spin_unlock(&j->lock);
+ return 0;
+ }
+
+ if ((flags & BCH_WATERMARK_MASK) < j->watermark) {
+ /*
+ * Don't want to close current journal entry, just need to
+ * invoke reclaim:
+ */
+ ret = JOURNAL_ERR_journal_full;
+ goto unlock;
+ }
+
+ /*
+ * If we couldn't get a reservation because the current buf filled up,
+ * and we had room for a bigger entry on disk, signal that we want to
+ * realloc the journal bufs:
+ */
+ buf = journal_cur_buf(j);
+ if (journal_entry_is_open(j) &&
+ buf->buf_size >> 9 < buf->disk_sectors &&
+ buf->buf_size < JOURNAL_ENTRY_SIZE_MAX)
+ j->buf_size_want = max(j->buf_size_want, buf->buf_size << 1);
+
+ __journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL);
+ ret = journal_entry_open(j);
+
+ if (ret == JOURNAL_ERR_max_in_flight) {
+ track_event_change(&c->times[BCH_TIME_blocked_journal_max_in_flight],
+ &j->max_in_flight_start, true);
+ trace_and_count(c, journal_entry_full, c);
+ }
+unlock:
+ can_discard = j->can_discard;
+ spin_unlock(&j->lock);
+
+ if (!ret)
+ goto retry;
+ if (journal_error_check_stuck(j, ret, flags))
+ ret = -BCH_ERR_journal_res_get_blocked;
+
+ /*
+ * Journal is full - can't rely on reclaim from work item due to
+ * freezing:
+ */
+ if ((ret == JOURNAL_ERR_journal_full ||
+ ret == JOURNAL_ERR_journal_pin_full) &&
+ !(flags & JOURNAL_RES_GET_NONBLOCK)) {
+ if (can_discard) {
+ bch2_journal_do_discards(j);
+ goto retry;
+ }
+
+ if (mutex_trylock(&j->reclaim_lock)) {
+ bch2_journal_reclaim(j);
+ mutex_unlock(&j->reclaim_lock);
+ }
+ }
+
+ return ret == JOURNAL_ERR_insufficient_devices
+ ? -BCH_ERR_erofs_journal_err
+ : -BCH_ERR_journal_res_get_blocked;
+}
+
+/*
+ * Essentially the entry function to the journaling code. When bcachefs is doing
+ * a btree insert, it calls this function to get the current journal write.
+ * Journal write is the structure used set up journal writes. The calling
+ * function will then add its keys to the structure, queuing them for the next
+ * write.
+ *
+ * To ensure forward progress, the current task must not be holding any
+ * btree node write locks.
+ */
+int bch2_journal_res_get_slowpath(struct journal *j, struct journal_res *res,
+ unsigned flags)
+{
+ int ret;
+
+ closure_wait_event(&j->async_wait,
+ (ret = __journal_res_get(j, res, flags)) != -BCH_ERR_journal_res_get_blocked ||
+ (flags & JOURNAL_RES_GET_NONBLOCK));
+ return ret;
+}
+
+/* journal_entry_res: */
+
+void bch2_journal_entry_res_resize(struct journal *j,
+ struct journal_entry_res *res,
+ unsigned new_u64s)
+{
+ union journal_res_state state;
+ int d = new_u64s - res->u64s;
+
+ spin_lock(&j->lock);
+
+ j->entry_u64s_reserved += d;
+ if (d <= 0)
+ goto out;
+
+ j->cur_entry_u64s = max_t(int, 0, j->cur_entry_u64s - d);
+ smp_mb();
+ state = READ_ONCE(j->reservations);
+
+ if (state.cur_entry_offset < JOURNAL_ENTRY_CLOSED_VAL &&
+ state.cur_entry_offset > j->cur_entry_u64s) {
+ j->cur_entry_u64s += d;
+ /*
+ * Not enough room in current journal entry, have to flush it:
+ */
+ __journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL);
+ } else {
+ journal_cur_buf(j)->u64s_reserved += d;
+ }
+out:
+ spin_unlock(&j->lock);
+ res->u64s += d;
+}
+
+/* journal flushing: */
+
+/**
+ * bch2_journal_flush_seq_async - wait for a journal entry to be written
+ * @j: journal object
+ * @seq: seq to flush
+ * @parent: closure object to wait with
+ * Returns: 1 if @seq has already been flushed, 0 if @seq is being flushed,
+ * -EIO if @seq will never be flushed
+ *
+ * Like bch2_journal_wait_on_seq, except that it triggers a write immediately if
+ * necessary
+ */
+int bch2_journal_flush_seq_async(struct journal *j, u64 seq,
+ struct closure *parent)
+{
+ struct journal_buf *buf;
+ int ret = 0;
+
+ if (seq <= j->flushed_seq_ondisk)
+ return 1;
+
+ spin_lock(&j->lock);
+
+ if (WARN_ONCE(seq > journal_cur_seq(j),
+ "requested to flush journal seq %llu, but currently at %llu",
+ seq, journal_cur_seq(j)))
+ goto out;
+
+ /* Recheck under lock: */
+ if (j->err_seq && seq >= j->err_seq) {
+ ret = -EIO;
+ goto out;
+ }
+
+ if (seq <= j->flushed_seq_ondisk) {
+ ret = 1;
+ goto out;
+ }
+
+ /* if seq was written, but not flushed - flush a newer one instead */
+ seq = max(seq, journal_last_unwritten_seq(j));
+
+recheck_need_open:
+ if (seq > journal_cur_seq(j)) {
+ struct journal_res res = { 0 };
+
+ if (journal_entry_is_open(j))
+ __journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL);
+
+ spin_unlock(&j->lock);
+
+ ret = bch2_journal_res_get(j, &res, jset_u64s(0), 0);
+ if (ret)
+ return ret;
+
+ seq = res.seq;
+ buf = j->buf + (seq & JOURNAL_BUF_MASK);
+ buf->must_flush = true;
+
+ if (!buf->flush_time) {
+ buf->flush_time = local_clock() ?: 1;
+ buf->expires = jiffies;
+ }
+
+ if (parent && !closure_wait(&buf->wait, parent))
+ BUG();
+
+ bch2_journal_res_put(j, &res);
+
+ spin_lock(&j->lock);
+ goto want_write;
+ }
+
+ /*
+ * if write was kicked off without a flush, flush the next sequence
+ * number instead
+ */
+ buf = journal_seq_to_buf(j, seq);
+ if (buf->noflush) {
+ seq++;
+ goto recheck_need_open;
+ }
+
+ buf->must_flush = true;
+
+ if (parent && !closure_wait(&buf->wait, parent))
+ BUG();
+want_write:
+ if (seq == journal_cur_seq(j))
+ journal_entry_want_write(j);
+out:
+ spin_unlock(&j->lock);
+ return ret;
+}
+
+int bch2_journal_flush_seq(struct journal *j, u64 seq)
+{
+ u64 start_time = local_clock();
+ int ret, ret2;
+
+ /*
+ * Don't update time_stats when @seq is already flushed:
+ */
+ if (seq <= j->flushed_seq_ondisk)
+ return 0;
+
+ ret = wait_event_interruptible(j->wait, (ret2 = bch2_journal_flush_seq_async(j, seq, NULL)));
+
+ if (!ret)
+ bch2_time_stats_update(j->flush_seq_time, start_time);
+
+ return ret ?: ret2 < 0 ? ret2 : 0;
+}
+
+/*
+ * bch2_journal_flush_async - if there is an open journal entry, or a journal
+ * still being written, write it and wait for the write to complete
+ */
+void bch2_journal_flush_async(struct journal *j, struct closure *parent)
+{
+ bch2_journal_flush_seq_async(j, atomic64_read(&j->seq), parent);
+}
+
+int bch2_journal_flush(struct journal *j)
+{
+ return bch2_journal_flush_seq(j, atomic64_read(&j->seq));
+}
+
+/*
+ * bch2_journal_noflush_seq - tell the journal not to issue any flushes before
+ * @seq
+ */
+bool bch2_journal_noflush_seq(struct journal *j, u64 seq)
+{
+ struct bch_fs *c = container_of(j, struct bch_fs, journal);
+ u64 unwritten_seq;
+ bool ret = false;
+
+ if (!(c->sb.features & (1ULL << BCH_FEATURE_journal_no_flush)))
+ return false;
+
+ if (seq <= c->journal.flushed_seq_ondisk)
+ return false;
+
+ spin_lock(&j->lock);
+ if (seq <= c->journal.flushed_seq_ondisk)
+ goto out;
+
+ for (unwritten_seq = journal_last_unwritten_seq(j);
+ unwritten_seq < seq;
+ unwritten_seq++) {
+ struct journal_buf *buf = journal_seq_to_buf(j, unwritten_seq);
+
+ /* journal write is already in flight, and was a flush write: */
+ if (unwritten_seq == journal_last_unwritten_seq(j) && !buf->noflush)
+ goto out;
+
+ buf->noflush = true;
+ }
+
+ ret = true;
+out:
+ spin_unlock(&j->lock);
+ return ret;
+}
+
+int bch2_journal_meta(struct journal *j)
+{
+ struct journal_buf *buf;
+ struct journal_res res;
+ int ret;
+
+ memset(&res, 0, sizeof(res));
+
+ ret = bch2_journal_res_get(j, &res, jset_u64s(0), 0);
+ if (ret)
+ return ret;
+
+ buf = j->buf + (res.seq & JOURNAL_BUF_MASK);
+ buf->must_flush = true;
+
+ if (!buf->flush_time) {
+ buf->flush_time = local_clock() ?: 1;
+ buf->expires = jiffies;
+ }
+
+ bch2_journal_res_put(j, &res);
+
+ return bch2_journal_flush_seq(j, res.seq);
+}
+
+/* block/unlock the journal: */
+
+void bch2_journal_unblock(struct journal *j)
+{
+ spin_lock(&j->lock);
+ j->blocked--;
+ spin_unlock(&j->lock);
+
+ journal_wake(j);
+}
+
+void bch2_journal_block(struct journal *j)
+{
+ spin_lock(&j->lock);
+ j->blocked++;
+ spin_unlock(&j->lock);
+
+ journal_quiesce(j);
+}
+
+static struct journal_buf *__bch2_next_write_buffer_flush_journal_buf(struct journal *j, u64 max_seq)
+{
+ struct journal_buf *ret = NULL;
+
+ mutex_lock(&j->buf_lock);
+ spin_lock(&j->lock);
+ max_seq = min(max_seq, journal_cur_seq(j));
+
+ for (u64 seq = journal_last_unwritten_seq(j);
+ seq <= max_seq;
+ seq++) {
+ unsigned idx = seq & JOURNAL_BUF_MASK;
+ struct journal_buf *buf = j->buf + idx;
+
+ if (buf->need_flush_to_write_buffer) {
+ if (seq == journal_cur_seq(j))
+ __journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL);
+
+ union journal_res_state s;
+ s.v = atomic64_read_acquire(&j->reservations.counter);
+
+ ret = journal_state_count(s, idx)
+ ? ERR_PTR(-EAGAIN)
+ : buf;
+ break;
+ }
+ }
+
+ spin_unlock(&j->lock);
+ if (IS_ERR_OR_NULL(ret))
+ mutex_unlock(&j->buf_lock);
+ return ret;
+}
+
+struct journal_buf *bch2_next_write_buffer_flush_journal_buf(struct journal *j, u64 max_seq)
+{
+ struct journal_buf *ret;
+
+ wait_event(j->wait, (ret = __bch2_next_write_buffer_flush_journal_buf(j, max_seq)) != ERR_PTR(-EAGAIN));
+ return ret;
+}
+
+/* allocate journal on a device: */
+
+static int __bch2_set_nr_journal_buckets(struct bch_dev *ca, unsigned nr,
+ bool new_fs, struct closure *cl)
+{
+ struct bch_fs *c = ca->fs;
+ struct journal_device *ja = &ca->journal;
+ u64 *new_bucket_seq = NULL, *new_buckets = NULL;
+ struct open_bucket **ob = NULL;
+ long *bu = NULL;
+ unsigned i, pos, nr_got = 0, nr_want = nr - ja->nr;
+ int ret = 0;
+
+ BUG_ON(nr <= ja->nr);
+
+ bu = kcalloc(nr_want, sizeof(*bu), GFP_KERNEL);
+ ob = kcalloc(nr_want, sizeof(*ob), GFP_KERNEL);
+ new_buckets = kcalloc(nr, sizeof(u64), GFP_KERNEL);
+ new_bucket_seq = kcalloc(nr, sizeof(u64), GFP_KERNEL);
+ if (!bu || !ob || !new_buckets || !new_bucket_seq) {
+ ret = -BCH_ERR_ENOMEM_set_nr_journal_buckets;
+ goto err_free;
+ }
+
+ for (nr_got = 0; nr_got < nr_want; nr_got++) {
+ if (new_fs) {
+ bu[nr_got] = bch2_bucket_alloc_new_fs(ca);
+ if (bu[nr_got] < 0) {
+ ret = -BCH_ERR_ENOSPC_bucket_alloc;
+ break;
+ }
+ } else {
+ ob[nr_got] = bch2_bucket_alloc(c, ca, BCH_WATERMARK_normal, cl);
+ ret = PTR_ERR_OR_ZERO(ob[nr_got]);
+ if (ret)
+ break;
+
+ ret = bch2_trans_run(c,
+ bch2_trans_mark_metadata_bucket(trans, ca,
+ ob[nr_got]->bucket, BCH_DATA_journal,
+ ca->mi.bucket_size));
+ if (ret) {
+ bch2_open_bucket_put(c, ob[nr_got]);
+ bch_err_msg(c, ret, "marking new journal buckets");
+ break;
+ }
+
+ bu[nr_got] = ob[nr_got]->bucket;
+ }
+ }
+
+ if (!nr_got)
+ goto err_free;
+
+ /* Don't return an error if we successfully allocated some buckets: */
+ ret = 0;
+
+ if (c) {
+ bch2_journal_flush_all_pins(&c->journal);
+ bch2_journal_block(&c->journal);
+ mutex_lock(&c->sb_lock);
+ }
+
+ memcpy(new_buckets, ja->buckets, ja->nr * sizeof(u64));
+ memcpy(new_bucket_seq, ja->bucket_seq, ja->nr * sizeof(u64));
+
+ BUG_ON(ja->discard_idx > ja->nr);
+
+ pos = ja->discard_idx ?: ja->nr;
+
+ memmove(new_buckets + pos + nr_got,
+ new_buckets + pos,
+ sizeof(new_buckets[0]) * (ja->nr - pos));
+ memmove(new_bucket_seq + pos + nr_got,
+ new_bucket_seq + pos,
+ sizeof(new_bucket_seq[0]) * (ja->nr - pos));
+
+ for (i = 0; i < nr_got; i++) {
+ new_buckets[pos + i] = bu[i];
+ new_bucket_seq[pos + i] = 0;
+ }
+
+ nr = ja->nr + nr_got;
+
+ ret = bch2_journal_buckets_to_sb(c, ca, new_buckets, nr);
+ if (ret)
+ goto err_unblock;
+
+ if (!new_fs)
+ bch2_write_super(c);
+
+ /* Commit: */
+ if (c)
+ spin_lock(&c->journal.lock);
+
+ swap(new_buckets, ja->buckets);
+ swap(new_bucket_seq, ja->bucket_seq);
+ ja->nr = nr;
+
+ if (pos <= ja->discard_idx)
+ ja->discard_idx = (ja->discard_idx + nr_got) % ja->nr;
+ if (pos <= ja->dirty_idx_ondisk)
+ ja->dirty_idx_ondisk = (ja->dirty_idx_ondisk + nr_got) % ja->nr;
+ if (pos <= ja->dirty_idx)
+ ja->dirty_idx = (ja->dirty_idx + nr_got) % ja->nr;
+ if (pos <= ja->cur_idx)
+ ja->cur_idx = (ja->cur_idx + nr_got) % ja->nr;
+
+ if (c)
+ spin_unlock(&c->journal.lock);
+err_unblock:
+ if (c) {
+ bch2_journal_unblock(&c->journal);
+ mutex_unlock(&c->sb_lock);
+ }
+
+ if (ret && !new_fs)
+ for (i = 0; i < nr_got; i++)
+ bch2_trans_run(c,
+ bch2_trans_mark_metadata_bucket(trans, ca,
+ bu[i], BCH_DATA_free, 0));
+err_free:
+ if (!new_fs)
+ for (i = 0; i < nr_got; i++)
+ bch2_open_bucket_put(c, ob[i]);
+
+ kfree(new_bucket_seq);
+ kfree(new_buckets);
+ kfree(ob);
+ kfree(bu);
+ return ret;
+}
+
+/*
+ * Allocate more journal space at runtime - not currently making use if it, but
+ * the code works:
+ */
+int bch2_set_nr_journal_buckets(struct bch_fs *c, struct bch_dev *ca,
+ unsigned nr)
+{
+ struct journal_device *ja = &ca->journal;
+ struct closure cl;
+ int ret = 0;
+
+ closure_init_stack(&cl);
+
+ down_write(&c->state_lock);
+
+ /* don't handle reducing nr of buckets yet: */
+ if (nr < ja->nr)
+ goto unlock;
+
+ while (ja->nr < nr) {
+ struct disk_reservation disk_res = { 0, 0, 0 };
+
+ /*
+ * note: journal buckets aren't really counted as _sectors_ used yet, so
+ * we don't need the disk reservation to avoid the BUG_ON() in buckets.c
+ * when space used goes up without a reservation - but we do need the
+ * reservation to ensure we'll actually be able to allocate:
+ *
+ * XXX: that's not right, disk reservations only ensure a
+ * filesystem-wide allocation will succeed, this is a device
+ * specific allocation - we can hang here:
+ */
+
+ ret = bch2_disk_reservation_get(c, &disk_res,
+ bucket_to_sector(ca, nr - ja->nr), 1, 0);
+ if (ret)
+ break;
+
+ ret = __bch2_set_nr_journal_buckets(ca, nr, false, &cl);
+
+ bch2_disk_reservation_put(c, &disk_res);
+
+ closure_sync(&cl);
+
+ if (ret && ret != -BCH_ERR_bucket_alloc_blocked)
+ break;
+ }
+
+ bch_err_fn(c, ret);
+unlock:
+ up_write(&c->state_lock);
+ return ret;
+}
+
+int bch2_dev_journal_alloc(struct bch_dev *ca)
+{
+ unsigned nr;
+ int ret;
+
+ if (dynamic_fault("bcachefs:add:journal_alloc")) {
+ ret = -BCH_ERR_ENOMEM_set_nr_journal_buckets;
+ goto err;
+ }
+
+ /* 1/128th of the device by default: */
+ nr = ca->mi.nbuckets >> 7;
+
+ /*
+ * clamp journal size to 8192 buckets or 8GB (in sectors), whichever
+ * is smaller:
+ */
+ nr = clamp_t(unsigned, nr,
+ BCH_JOURNAL_BUCKETS_MIN,
+ min(1 << 13,
+ (1 << 24) / ca->mi.bucket_size));
+
+ ret = __bch2_set_nr_journal_buckets(ca, nr, true, NULL);
+err:
+ bch_err_fn(ca, ret);
+ return ret;
+}
+
+int bch2_fs_journal_alloc(struct bch_fs *c)
+{
+ for_each_online_member(c, ca) {
+ if (ca->journal.nr)
+ continue;
+
+ int ret = bch2_dev_journal_alloc(ca);
+ if (ret) {
+ percpu_ref_put(&ca->io_ref);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+/* startup/shutdown: */
+
+static bool bch2_journal_writing_to_device(struct journal *j, unsigned dev_idx)
+{
+ bool ret = false;
+ u64 seq;
+
+ spin_lock(&j->lock);
+ for (seq = journal_last_unwritten_seq(j);
+ seq <= journal_cur_seq(j) && !ret;
+ seq++) {
+ struct journal_buf *buf = journal_seq_to_buf(j, seq);
+
+ if (bch2_bkey_has_device_c(bkey_i_to_s_c(&buf->key), dev_idx))
+ ret = true;
+ }
+ spin_unlock(&j->lock);
+
+ return ret;
+}
+
+void bch2_dev_journal_stop(struct journal *j, struct bch_dev *ca)
+{
+ wait_event(j->wait, !bch2_journal_writing_to_device(j, ca->dev_idx));
+}
+
+void bch2_fs_journal_stop(struct journal *j)
+{
+ bch2_journal_reclaim_stop(j);
+ bch2_journal_flush_all_pins(j);
+
+ wait_event(j->wait, bch2_journal_entry_close(j));
+
+ /*
+ * Always write a new journal entry, to make sure the clock hands are up
+ * to date (and match the superblock)
+ */
+ bch2_journal_meta(j);
+
+ journal_quiesce(j);
+
+ BUG_ON(!bch2_journal_error(j) &&
+ test_bit(JOURNAL_REPLAY_DONE, &j->flags) &&
+ j->last_empty_seq != journal_cur_seq(j));
+
+ cancel_delayed_work_sync(&j->write_work);
+}
+
+int bch2_fs_journal_start(struct journal *j, u64 cur_seq)
+{
+ struct bch_fs *c = container_of(j, struct bch_fs, journal);
+ struct journal_entry_pin_list *p;
+ struct journal_replay *i, **_i;
+ struct genradix_iter iter;
+ bool had_entries = false;
+ unsigned ptr;
+ u64 last_seq = cur_seq, nr, seq;
+
+ genradix_for_each_reverse(&c->journal_entries, iter, _i) {
+ i = *_i;
+
+ if (!i || i->ignore)
+ continue;
+
+ last_seq = le64_to_cpu(i->j.last_seq);
+ break;
+ }
+
+ nr = cur_seq - last_seq;
+
+ if (nr + 1 > j->pin.size) {
+ free_fifo(&j->pin);
+ init_fifo(&j->pin, roundup_pow_of_two(nr + 1), GFP_KERNEL);
+ if (!j->pin.data) {
+ bch_err(c, "error reallocating journal fifo (%llu open entries)", nr);
+ return -BCH_ERR_ENOMEM_journal_pin_fifo;
+ }
+ }
+
+ j->replay_journal_seq = last_seq;
+ j->replay_journal_seq_end = cur_seq;
+ j->last_seq_ondisk = last_seq;
+ j->flushed_seq_ondisk = cur_seq - 1;
+ j->seq_ondisk = cur_seq - 1;
+ j->pin.front = last_seq;
+ j->pin.back = cur_seq;
+ atomic64_set(&j->seq, cur_seq - 1);
+
+ fifo_for_each_entry_ptr(p, &j->pin, seq)
+ journal_pin_list_init(p, 1);
+
+ genradix_for_each(&c->journal_entries, iter, _i) {
+ i = *_i;
+
+ if (!i || i->ignore)
+ continue;
+
+ seq = le64_to_cpu(i->j.seq);
+ BUG_ON(seq >= cur_seq);
+
+ if (seq < last_seq)
+ continue;
+
+ if (journal_entry_empty(&i->j))
+ j->last_empty_seq = le64_to_cpu(i->j.seq);
+
+ p = journal_seq_pin(j, seq);
+
+ p->devs.nr = 0;
+ for (ptr = 0; ptr < i->nr_ptrs; ptr++)
+ bch2_dev_list_add_dev(&p->devs, i->ptrs[ptr].dev);
+
+ had_entries = true;
+ }
+
+ if (!had_entries)
+ j->last_empty_seq = cur_seq;
+
+ spin_lock(&j->lock);
+
+ set_bit(JOURNAL_STARTED, &j->flags);
+ j->last_flush_write = jiffies;
+
+ j->reservations.idx = j->reservations.unwritten_idx = journal_cur_seq(j);
+ j->reservations.unwritten_idx++;
+
+ c->last_bucket_seq_cleanup = journal_cur_seq(j);
+
+ bch2_journal_space_available(j);
+ spin_unlock(&j->lock);
+
+ return bch2_journal_reclaim_start(j);
+}
+
+/* init/exit: */
+
+void bch2_dev_journal_exit(struct bch_dev *ca)
+{
+ kfree(ca->journal.bio);
+ kfree(ca->journal.buckets);
+ kfree(ca->journal.bucket_seq);
+
+ ca->journal.bio = NULL;
+ ca->journal.buckets = NULL;
+ ca->journal.bucket_seq = NULL;
+}
+
+int bch2_dev_journal_init(struct bch_dev *ca, struct bch_sb *sb)
+{
+ struct journal_device *ja = &ca->journal;
+ struct bch_sb_field_journal *journal_buckets =
+ bch2_sb_field_get(sb, journal);
+ struct bch_sb_field_journal_v2 *journal_buckets_v2 =
+ bch2_sb_field_get(sb, journal_v2);
+ unsigned i, nr_bvecs;
+
+ ja->nr = 0;
+
+ if (journal_buckets_v2) {
+ unsigned nr = bch2_sb_field_journal_v2_nr_entries(journal_buckets_v2);
+
+ for (i = 0; i < nr; i++)
+ ja->nr += le64_to_cpu(journal_buckets_v2->d[i].nr);
+ } else if (journal_buckets) {
+ ja->nr = bch2_nr_journal_buckets(journal_buckets);
+ }
+
+ ja->bucket_seq = kcalloc(ja->nr, sizeof(u64), GFP_KERNEL);
+ if (!ja->bucket_seq)
+ return -BCH_ERR_ENOMEM_dev_journal_init;
+
+ nr_bvecs = DIV_ROUND_UP(JOURNAL_ENTRY_SIZE_MAX, PAGE_SIZE);
+
+ ca->journal.bio = bio_kmalloc(nr_bvecs, GFP_KERNEL);
+ if (!ca->journal.bio)
+ return -BCH_ERR_ENOMEM_dev_journal_init;
+
+ bio_init(ca->journal.bio, NULL, ca->journal.bio->bi_inline_vecs, nr_bvecs, 0);
+
+ ja->buckets = kcalloc(ja->nr, sizeof(u64), GFP_KERNEL);
+ if (!ja->buckets)
+ return -BCH_ERR_ENOMEM_dev_journal_init;
+
+ if (journal_buckets_v2) {
+ unsigned nr = bch2_sb_field_journal_v2_nr_entries(journal_buckets_v2);
+ unsigned j, dst = 0;
+
+ for (i = 0; i < nr; i++)
+ for (j = 0; j < le64_to_cpu(journal_buckets_v2->d[i].nr); j++)
+ ja->buckets[dst++] =
+ le64_to_cpu(journal_buckets_v2->d[i].start) + j;
+ } else if (journal_buckets) {
+ for (i = 0; i < ja->nr; i++)
+ ja->buckets[i] = le64_to_cpu(journal_buckets->buckets[i]);
+ }
+
+ return 0;
+}
+
+void bch2_fs_journal_exit(struct journal *j)
+{
+ unsigned i;
+
+ darray_exit(&j->early_journal_entries);
+
+ for (i = 0; i < ARRAY_SIZE(j->buf); i++)
+ kvpfree(j->buf[i].data, j->buf[i].buf_size);
+ free_fifo(&j->pin);
+}
+
+int bch2_fs_journal_init(struct journal *j)
+{
+ static struct lock_class_key res_key;
+ unsigned i;
+
+ mutex_init(&j->buf_lock);
+ spin_lock_init(&j->lock);
+ spin_lock_init(&j->err_lock);
+ init_waitqueue_head(&j->wait);
+ INIT_DELAYED_WORK(&j->write_work, journal_write_work);
+ init_waitqueue_head(&j->reclaim_wait);
+ init_waitqueue_head(&j->pin_flush_wait);
+ mutex_init(&j->reclaim_lock);
+ mutex_init(&j->discard_lock);
+
+ lockdep_init_map(&j->res_map, "journal res", &res_key, 0);
+
+ atomic64_set(&j->reservations.counter,
+ ((union journal_res_state)
+ { .cur_entry_offset = JOURNAL_ENTRY_CLOSED_VAL }).v);
+
+ if (!(init_fifo(&j->pin, JOURNAL_PIN, GFP_KERNEL)))
+ return -BCH_ERR_ENOMEM_journal_pin_fifo;
+
+ for (i = 0; i < ARRAY_SIZE(j->buf); i++) {
+ j->buf[i].buf_size = JOURNAL_ENTRY_SIZE_MIN;
+ j->buf[i].data = kvpmalloc(j->buf[i].buf_size, GFP_KERNEL);
+ if (!j->buf[i].data)
+ return -BCH_ERR_ENOMEM_journal_buf;
+ }
+
+ j->pin.front = j->pin.back = 1;
+ return 0;
+}
+
+/* debug: */
+
+void __bch2_journal_debug_to_text(struct printbuf *out, struct journal *j)
+{
+ struct bch_fs *c = container_of(j, struct bch_fs, journal);
+ union journal_res_state s;
+ unsigned long now = jiffies;
+ u64 nr_writes = j->nr_flush_writes + j->nr_noflush_writes;
+
+ if (!out->nr_tabstops)
+ printbuf_tabstop_push(out, 24);
+ out->atomic++;
+
+ rcu_read_lock();
+ s = READ_ONCE(j->reservations);
+
+ prt_printf(out, "dirty journal entries:\t%llu/%llu\n", fifo_used(&j->pin), j->pin.size);
+ prt_printf(out, "seq:\t\t\t%llu\n", journal_cur_seq(j));
+ prt_printf(out, "seq_ondisk:\t\t%llu\n", j->seq_ondisk);
+ prt_printf(out, "last_seq:\t\t%llu\n", journal_last_seq(j));
+ prt_printf(out, "last_seq_ondisk:\t%llu\n", j->last_seq_ondisk);
+ prt_printf(out, "flushed_seq_ondisk:\t%llu\n", j->flushed_seq_ondisk);
+ prt_printf(out, "watermark:\t\t%s\n", bch2_watermarks[j->watermark]);
+ prt_printf(out, "each entry reserved:\t%u\n", j->entry_u64s_reserved);
+ prt_printf(out, "nr flush writes:\t%llu\n", j->nr_flush_writes);
+ prt_printf(out, "nr noflush writes:\t%llu\n", j->nr_noflush_writes);
+ prt_printf(out, "average write size:\t");
+ prt_human_readable_u64(out, nr_writes ? div64_u64(j->entry_bytes_written, nr_writes) : 0);
+ prt_newline(out);
+ prt_printf(out, "nr direct reclaim:\t%llu\n", j->nr_direct_reclaim);
+ prt_printf(out, "nr background reclaim:\t%llu\n", j->nr_background_reclaim);
+ prt_printf(out, "reclaim kicked:\t\t%u\n", j->reclaim_kicked);
+ prt_printf(out, "reclaim runs in:\t%u ms\n", time_after(j->next_reclaim, now)
+ ? jiffies_to_msecs(j->next_reclaim - jiffies) : 0);
+ prt_printf(out, "current entry sectors:\t%u\n", j->cur_entry_sectors);
+ prt_printf(out, "current entry error:\t%s\n", bch2_journal_errors[j->cur_entry_error]);
+ prt_printf(out, "current entry:\t\t");
+
+ switch (s.cur_entry_offset) {
+ case JOURNAL_ENTRY_ERROR_VAL:
+ prt_printf(out, "error");
+ break;
+ case JOURNAL_ENTRY_CLOSED_VAL:
+ prt_printf(out, "closed");
+ break;
+ default:
+ prt_printf(out, "%u/%u", s.cur_entry_offset, j->cur_entry_u64s);
+ break;
+ }
+
+ prt_newline(out);
+
+ for (u64 seq = journal_cur_seq(j);
+ seq >= journal_last_unwritten_seq(j);
+ --seq) {
+ unsigned i = seq & JOURNAL_BUF_MASK;
+
+ prt_printf(out, "unwritten entry:");
+ prt_tab(out);
+ prt_printf(out, "%llu", seq);
+ prt_newline(out);
+ printbuf_indent_add(out, 2);
+
+ prt_printf(out, "refcount:");
+ prt_tab(out);
+ prt_printf(out, "%u", journal_state_count(s, i));
+ prt_newline(out);
+
+ prt_printf(out, "sectors:");
+ prt_tab(out);
+ prt_printf(out, "%u", j->buf[i].sectors);
+ prt_newline(out);
+
+ prt_printf(out, "expires");
+ prt_tab(out);
+ prt_printf(out, "%li jiffies", j->buf[i].expires - jiffies);
+ prt_newline(out);
+
+ printbuf_indent_sub(out, 2);
+ }
+
+ prt_printf(out,
+ "replay done:\t\t%i\n",
+ test_bit(JOURNAL_REPLAY_DONE, &j->flags));
+
+ prt_printf(out, "space:\n");
+ prt_printf(out, "\tdiscarded\t%u:%u\n",
+ j->space[journal_space_discarded].next_entry,
+ j->space[journal_space_discarded].total);
+ prt_printf(out, "\tclean ondisk\t%u:%u\n",
+ j->space[journal_space_clean_ondisk].next_entry,
+ j->space[journal_space_clean_ondisk].total);
+ prt_printf(out, "\tclean\t\t%u:%u\n",
+ j->space[journal_space_clean].next_entry,
+ j->space[journal_space_clean].total);
+ prt_printf(out, "\ttotal\t\t%u:%u\n",
+ j->space[journal_space_total].next_entry,
+ j->space[journal_space_total].total);
+
+ for_each_member_device_rcu(c, ca, &c->rw_devs[BCH_DATA_journal]) {
+ struct journal_device *ja = &ca->journal;
+
+ if (!test_bit(ca->dev_idx, c->rw_devs[BCH_DATA_journal].d))
+ continue;
+
+ if (!ja->nr)
+ continue;
+
+ prt_printf(out, "dev %u:\n", ca->dev_idx);
+ prt_printf(out, "\tnr\t\t%u\n", ja->nr);
+ prt_printf(out, "\tbucket size\t%u\n", ca->mi.bucket_size);
+ prt_printf(out, "\tavailable\t%u:%u\n", bch2_journal_dev_buckets_available(j, ja, journal_space_discarded), ja->sectors_free);
+ prt_printf(out, "\tdiscard_idx\t%u\n", ja->discard_idx);
+ prt_printf(out, "\tdirty_ondisk\t%u (seq %llu)\n", ja->dirty_idx_ondisk, ja->bucket_seq[ja->dirty_idx_ondisk]);
+ prt_printf(out, "\tdirty_idx\t%u (seq %llu)\n", ja->dirty_idx, ja->bucket_seq[ja->dirty_idx]);
+ prt_printf(out, "\tcur_idx\t\t%u (seq %llu)\n", ja->cur_idx, ja->bucket_seq[ja->cur_idx]);
+ }
+
+ rcu_read_unlock();
+
+ --out->atomic;
+}
+
+void bch2_journal_debug_to_text(struct printbuf *out, struct journal *j)
+{
+ spin_lock(&j->lock);
+ __bch2_journal_debug_to_text(out, j);
+ spin_unlock(&j->lock);
+}
+
+bool bch2_journal_seq_pins_to_text(struct printbuf *out, struct journal *j, u64 *seq)
+{
+ struct journal_entry_pin_list *pin_list;
+ struct journal_entry_pin *pin;
+ unsigned i;
+
+ spin_lock(&j->lock);
+ *seq = max(*seq, j->pin.front);
+
+ if (*seq >= j->pin.back) {
+ spin_unlock(&j->lock);
+ return true;
+ }
+
+ out->atomic++;
+
+ pin_list = journal_seq_pin(j, *seq);
+
+ prt_printf(out, "%llu: count %u", *seq, atomic_read(&pin_list->count));
+ prt_newline(out);
+ printbuf_indent_add(out, 2);
+
+ for (i = 0; i < ARRAY_SIZE(pin_list->list); i++)
+ list_for_each_entry(pin, &pin_list->list[i], list) {
+ prt_printf(out, "\t%px %ps", pin, pin->flush);
+ prt_newline(out);
+ }
+
+ if (!list_empty(&pin_list->flushed)) {
+ prt_printf(out, "flushed:");
+ prt_newline(out);
+ }
+
+ list_for_each_entry(pin, &pin_list->flushed, list) {
+ prt_printf(out, "\t%px %ps", pin, pin->flush);
+ prt_newline(out);
+ }
+
+ printbuf_indent_sub(out, 2);
+
+ --out->atomic;
+ spin_unlock(&j->lock);
+
+ return false;
+}
+
+void bch2_journal_pins_to_text(struct printbuf *out, struct journal *j)
+{
+ u64 seq = 0;
+
+ while (!bch2_journal_seq_pins_to_text(out, j, &seq))
+ seq++;
+}
projects / bcachefs-tools-debian / blobdiff