3956ff8bc2
Fix a bug where mount was failing with -ERESTARTSYS: https://github.com/koverstreet/bcachefs/issues/741 We only want the interruptible wait when called from fsync. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
1584 lines
40 KiB
C
1584 lines
40 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* bcachefs journalling code, for btree insertions
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*
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* Copyright 2012 Google, Inc.
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*/
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#include "bcachefs.h"
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#include "alloc_foreground.h"
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#include "bkey_methods.h"
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#include "btree_gc.h"
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#include "btree_update.h"
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#include "btree_write_buffer.h"
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#include "buckets.h"
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#include "error.h"
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#include "journal.h"
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#include "journal_io.h"
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#include "journal_reclaim.h"
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#include "journal_sb.h"
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#include "journal_seq_blacklist.h"
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#include "trace.h"
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static const char * const bch2_journal_errors[] = {
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#define x(n) #n,
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JOURNAL_ERRORS()
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#undef x
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NULL
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};
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static inline bool journal_seq_unwritten(struct journal *j, u64 seq)
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{
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return seq > j->seq_ondisk;
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}
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static bool __journal_entry_is_open(union journal_res_state state)
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{
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return state.cur_entry_offset < JOURNAL_ENTRY_CLOSED_VAL;
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}
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static inline unsigned nr_unwritten_journal_entries(struct journal *j)
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{
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return atomic64_read(&j->seq) - j->seq_ondisk;
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}
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static bool journal_entry_is_open(struct journal *j)
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{
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return __journal_entry_is_open(j->reservations);
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}
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static void bch2_journal_buf_to_text(struct printbuf *out, struct journal *j, u64 seq)
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{
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union journal_res_state s = READ_ONCE(j->reservations);
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unsigned i = seq & JOURNAL_BUF_MASK;
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struct journal_buf *buf = j->buf + i;
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prt_printf(out, "seq:\t%llu\n", seq);
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printbuf_indent_add(out, 2);
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prt_printf(out, "refcount:\t%u\n", journal_state_count(s, i));
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prt_printf(out, "size:\t");
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prt_human_readable_u64(out, vstruct_bytes(buf->data));
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prt_newline(out);
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prt_printf(out, "expires:\t");
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prt_printf(out, "%li jiffies\n", buf->expires - jiffies);
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prt_printf(out, "flags:\t");
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if (buf->noflush)
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prt_str(out, "noflush ");
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if (buf->must_flush)
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prt_str(out, "must_flush ");
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if (buf->separate_flush)
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prt_str(out, "separate_flush ");
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if (buf->need_flush_to_write_buffer)
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prt_str(out, "need_flush_to_write_buffer ");
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if (buf->write_started)
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prt_str(out, "write_started ");
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if (buf->write_allocated)
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prt_str(out, "write_allocated ");
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if (buf->write_done)
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prt_str(out, "write_done");
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prt_newline(out);
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printbuf_indent_sub(out, 2);
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}
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static void bch2_journal_bufs_to_text(struct printbuf *out, struct journal *j)
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{
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if (!out->nr_tabstops)
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printbuf_tabstop_push(out, 24);
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for (u64 seq = journal_last_unwritten_seq(j);
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seq <= journal_cur_seq(j);
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seq++)
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bch2_journal_buf_to_text(out, j, seq);
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prt_printf(out, "last buf %s\n", journal_entry_is_open(j) ? "open" : "closed");
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}
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static inline struct journal_buf *
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journal_seq_to_buf(struct journal *j, u64 seq)
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{
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struct journal_buf *buf = NULL;
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EBUG_ON(seq > journal_cur_seq(j));
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if (journal_seq_unwritten(j, seq)) {
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buf = j->buf + (seq & JOURNAL_BUF_MASK);
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EBUG_ON(le64_to_cpu(buf->data->seq) != seq);
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}
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return buf;
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}
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static void journal_pin_list_init(struct journal_entry_pin_list *p, int count)
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{
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unsigned i;
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for (i = 0; i < ARRAY_SIZE(p->list); i++)
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INIT_LIST_HEAD(&p->list[i]);
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INIT_LIST_HEAD(&p->flushed);
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atomic_set(&p->count, count);
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p->devs.nr = 0;
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}
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/*
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* Detect stuck journal conditions and trigger shutdown. Technically the journal
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* can end up stuck for a variety of reasons, such as a blocked I/O, journal
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* reservation lockup, etc. Since this is a fatal error with potentially
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* unpredictable characteristics, we want to be fairly conservative before we
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* decide to shut things down.
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*
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* Consider the journal stuck when it appears full with no ability to commit
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* btree transactions, to discard journal buckets, nor acquire priority
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* (reserved watermark) reservation.
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*/
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static inline bool
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journal_error_check_stuck(struct journal *j, int error, unsigned flags)
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{
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struct bch_fs *c = container_of(j, struct bch_fs, journal);
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bool stuck = false;
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struct printbuf buf = PRINTBUF;
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if (!(error == JOURNAL_ERR_journal_full ||
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error == JOURNAL_ERR_journal_pin_full) ||
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nr_unwritten_journal_entries(j) ||
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(flags & BCH_WATERMARK_MASK) != BCH_WATERMARK_reclaim)
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return stuck;
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spin_lock(&j->lock);
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if (j->can_discard) {
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spin_unlock(&j->lock);
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return stuck;
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}
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stuck = true;
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/*
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* The journal shutdown path will set ->err_seq, but do it here first to
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* serialize against concurrent failures and avoid duplicate error
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* reports.
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*/
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if (j->err_seq) {
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spin_unlock(&j->lock);
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return stuck;
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}
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j->err_seq = journal_cur_seq(j);
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spin_unlock(&j->lock);
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bch_err(c, "Journal stuck! Hava a pre-reservation but journal full (error %s)",
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bch2_journal_errors[error]);
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bch2_journal_debug_to_text(&buf, j);
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bch_err(c, "%s", buf.buf);
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printbuf_reset(&buf);
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bch2_journal_pins_to_text(&buf, j);
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bch_err(c, "Journal pins:\n%s", buf.buf);
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printbuf_exit(&buf);
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bch2_fatal_error(c);
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dump_stack();
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return stuck;
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}
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void bch2_journal_do_writes(struct journal *j)
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{
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for (u64 seq = journal_last_unwritten_seq(j);
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seq <= journal_cur_seq(j);
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seq++) {
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unsigned idx = seq & JOURNAL_BUF_MASK;
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struct journal_buf *w = j->buf + idx;
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if (w->write_started && !w->write_allocated)
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break;
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if (w->write_started)
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continue;
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if (!journal_state_count(j->reservations, idx)) {
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w->write_started = true;
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closure_call(&w->io, bch2_journal_write, j->wq, NULL);
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}
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break;
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}
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}
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/*
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* Final processing when the last reference of a journal buffer has been
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* dropped. Drop the pin list reference acquired at journal entry open and write
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* the buffer, if requested.
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*/
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void bch2_journal_buf_put_final(struct journal *j, u64 seq)
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{
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lockdep_assert_held(&j->lock);
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if (__bch2_journal_pin_put(j, seq))
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bch2_journal_reclaim_fast(j);
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bch2_journal_do_writes(j);
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}
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/*
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* Returns true if journal entry is now closed:
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*
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* We don't close a journal_buf until the next journal_buf is finished writing,
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* and can be opened again - this also initializes the next journal_buf:
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*/
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static void __journal_entry_close(struct journal *j, unsigned closed_val, bool trace)
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{
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struct bch_fs *c = container_of(j, struct bch_fs, journal);
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struct journal_buf *buf = journal_cur_buf(j);
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union journal_res_state old, new;
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unsigned sectors;
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BUG_ON(closed_val != JOURNAL_ENTRY_CLOSED_VAL &&
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closed_val != JOURNAL_ENTRY_ERROR_VAL);
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lockdep_assert_held(&j->lock);
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old.v = atomic64_read(&j->reservations.counter);
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do {
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new.v = old.v;
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new.cur_entry_offset = closed_val;
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if (old.cur_entry_offset == JOURNAL_ENTRY_ERROR_VAL ||
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old.cur_entry_offset == new.cur_entry_offset)
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return;
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} while (!atomic64_try_cmpxchg(&j->reservations.counter,
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&old.v, new.v));
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if (!__journal_entry_is_open(old))
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return;
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/* Close out old buffer: */
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buf->data->u64s = cpu_to_le32(old.cur_entry_offset);
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if (trace_journal_entry_close_enabled() && trace) {
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struct printbuf pbuf = PRINTBUF;
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pbuf.atomic++;
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prt_str(&pbuf, "entry size: ");
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prt_human_readable_u64(&pbuf, vstruct_bytes(buf->data));
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prt_newline(&pbuf);
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bch2_prt_task_backtrace(&pbuf, current, 1, GFP_NOWAIT);
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trace_journal_entry_close(c, pbuf.buf);
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printbuf_exit(&pbuf);
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}
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sectors = vstruct_blocks_plus(buf->data, c->block_bits,
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buf->u64s_reserved) << c->block_bits;
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BUG_ON(sectors > buf->sectors);
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buf->sectors = sectors;
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/*
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* We have to set last_seq here, _before_ opening a new journal entry:
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*
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* A threads may replace an old pin with a new pin on their current
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* journal reservation - the expectation being that the journal will
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* contain either what the old pin protected or what the new pin
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* protects.
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*
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* After the old pin is dropped journal_last_seq() won't include the old
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* pin, so we can only write the updated last_seq on the entry that
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* contains whatever the new pin protects.
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*
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* Restated, we can _not_ update last_seq for a given entry if there
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* could be a newer entry open with reservations/pins that have been
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* taken against it.
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*
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* Hence, we want update/set last_seq on the current journal entry right
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* before we open a new one:
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*/
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buf->last_seq = journal_last_seq(j);
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buf->data->last_seq = cpu_to_le64(buf->last_seq);
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BUG_ON(buf->last_seq > le64_to_cpu(buf->data->seq));
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cancel_delayed_work(&j->write_work);
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bch2_journal_space_available(j);
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__bch2_journal_buf_put(j, old.idx, le64_to_cpu(buf->data->seq));
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}
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void bch2_journal_halt(struct journal *j)
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{
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spin_lock(&j->lock);
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__journal_entry_close(j, JOURNAL_ENTRY_ERROR_VAL, true);
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if (!j->err_seq)
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j->err_seq = journal_cur_seq(j);
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journal_wake(j);
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spin_unlock(&j->lock);
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}
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static bool journal_entry_want_write(struct journal *j)
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{
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bool ret = !journal_entry_is_open(j) ||
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journal_cur_seq(j) == journal_last_unwritten_seq(j);
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/* Don't close it yet if we already have a write in flight: */
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if (ret)
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__journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL, true);
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else if (nr_unwritten_journal_entries(j)) {
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struct journal_buf *buf = journal_cur_buf(j);
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if (!buf->flush_time) {
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buf->flush_time = local_clock() ?: 1;
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buf->expires = jiffies;
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}
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}
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return ret;
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}
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bool bch2_journal_entry_close(struct journal *j)
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{
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bool ret;
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spin_lock(&j->lock);
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ret = journal_entry_want_write(j);
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spin_unlock(&j->lock);
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return ret;
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}
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/*
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* should _only_ called from journal_res_get() - when we actually want a
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* journal reservation - journal entry is open means journal is dirty:
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*/
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static int journal_entry_open(struct journal *j)
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{
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struct bch_fs *c = container_of(j, struct bch_fs, journal);
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struct journal_buf *buf = j->buf +
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((journal_cur_seq(j) + 1) & JOURNAL_BUF_MASK);
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union journal_res_state old, new;
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int u64s;
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lockdep_assert_held(&j->lock);
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BUG_ON(journal_entry_is_open(j));
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BUG_ON(BCH_SB_CLEAN(c->disk_sb.sb));
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if (j->blocked)
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return JOURNAL_ERR_blocked;
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if (j->cur_entry_error)
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return j->cur_entry_error;
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if (bch2_journal_error(j))
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return JOURNAL_ERR_insufficient_devices; /* -EROFS */
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if (!fifo_free(&j->pin))
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return JOURNAL_ERR_journal_pin_full;
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if (nr_unwritten_journal_entries(j) == ARRAY_SIZE(j->buf))
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return JOURNAL_ERR_max_in_flight;
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BUG_ON(!j->cur_entry_sectors);
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buf->expires =
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(journal_cur_seq(j) == j->flushed_seq_ondisk
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? jiffies
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: j->last_flush_write) +
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msecs_to_jiffies(c->opts.journal_flush_delay);
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buf->u64s_reserved = j->entry_u64s_reserved;
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buf->disk_sectors = j->cur_entry_sectors;
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buf->sectors = min(buf->disk_sectors, buf->buf_size >> 9);
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u64s = (int) (buf->sectors << 9) / sizeof(u64) -
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journal_entry_overhead(j);
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u64s = clamp_t(int, u64s, 0, JOURNAL_ENTRY_CLOSED_VAL - 1);
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if (u64s <= (ssize_t) j->early_journal_entries.nr)
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return JOURNAL_ERR_journal_full;
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if (fifo_empty(&j->pin) && j->reclaim_thread)
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wake_up_process(j->reclaim_thread);
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/*
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* The fifo_push() needs to happen at the same time as j->seq is
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* incremented for journal_last_seq() to be calculated correctly
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*/
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atomic64_inc(&j->seq);
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journal_pin_list_init(fifo_push_ref(&j->pin), 1);
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BUG_ON(j->pin.back - 1 != atomic64_read(&j->seq));
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BUG_ON(j->buf + (journal_cur_seq(j) & JOURNAL_BUF_MASK) != buf);
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bkey_extent_init(&buf->key);
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buf->noflush = false;
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buf->must_flush = false;
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buf->separate_flush = false;
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buf->flush_time = 0;
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buf->need_flush_to_write_buffer = true;
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buf->write_started = false;
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buf->write_allocated = false;
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buf->write_done = false;
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memset(buf->data, 0, sizeof(*buf->data));
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buf->data->seq = cpu_to_le64(journal_cur_seq(j));
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buf->data->u64s = 0;
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if (j->early_journal_entries.nr) {
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memcpy(buf->data->_data, j->early_journal_entries.data,
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j->early_journal_entries.nr * sizeof(u64));
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le32_add_cpu(&buf->data->u64s, j->early_journal_entries.nr);
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}
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/*
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* Must be set before marking the journal entry as open:
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*/
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j->cur_entry_u64s = u64s;
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old.v = atomic64_read(&j->reservations.counter);
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do {
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new.v = old.v;
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BUG_ON(old.cur_entry_offset == JOURNAL_ENTRY_ERROR_VAL);
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new.idx++;
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BUG_ON(journal_state_count(new, new.idx));
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BUG_ON(new.idx != (journal_cur_seq(j) & JOURNAL_BUF_MASK));
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journal_state_inc(&new);
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/* Handle any already added entries */
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new.cur_entry_offset = le32_to_cpu(buf->data->u64s);
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} while (!atomic64_try_cmpxchg(&j->reservations.counter,
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&old.v, new.v));
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if (nr_unwritten_journal_entries(j) == 1)
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mod_delayed_work(j->wq,
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&j->write_work,
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msecs_to_jiffies(c->opts.journal_flush_delay));
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journal_wake(j);
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if (j->early_journal_entries.nr)
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darray_exit(&j->early_journal_entries);
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return 0;
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}
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static bool journal_quiesced(struct journal *j)
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{
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bool ret = atomic64_read(&j->seq) == j->seq_ondisk;
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if (!ret)
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bch2_journal_entry_close(j);
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return ret;
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}
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static void journal_quiesce(struct journal *j)
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{
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wait_event(j->wait, journal_quiesced(j));
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}
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static void journal_write_work(struct work_struct *work)
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{
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struct journal *j = container_of(work, struct journal, write_work.work);
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spin_lock(&j->lock);
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if (__journal_entry_is_open(j->reservations)) {
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long delta = journal_cur_buf(j)->expires - jiffies;
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if (delta > 0)
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mod_delayed_work(j->wq, &j->write_work, delta);
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else
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__journal_entry_close(j, JOURNAL_ENTRY_CLOSED_VAL, true);
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}
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spin_unlock(&j->lock);
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}
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static int __journal_res_get(struct journal *j, struct journal_res *res,
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unsigned flags)
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{
|
|
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;
|
|
|
|
if (j->blocked)
|
|
return -BCH_ERR_journal_res_get_blocked;
|
|
|
|
if ((flags & BCH_WATERMARK_MASK) < j->watermark) {
|
|
ret = JOURNAL_ERR_journal_full;
|
|
can_discard = j->can_discard;
|
|
goto out;
|
|
}
|
|
|
|
if (nr_unwritten_journal_entries(j) == ARRAY_SIZE(j->buf) && !journal_entry_is_open(j)) {
|
|
ret = JOURNAL_ERR_max_in_flight;
|
|
goto out;
|
|
}
|
|
|
|
spin_lock(&j->lock);
|
|
|
|
/*
|
|
* 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)) {
|
|
ret = 0;
|
|
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, false);
|
|
ret = journal_entry_open(j) ?: JOURNAL_ERR_retry;
|
|
unlock:
|
|
can_discard = j->can_discard;
|
|
spin_unlock(&j->lock);
|
|
out:
|
|
if (ret == JOURNAL_ERR_retry)
|
|
goto retry;
|
|
if (!ret)
|
|
return 0;
|
|
|
|
if (journal_error_check_stuck(j, ret, flags))
|
|
ret = -BCH_ERR_journal_res_get_blocked;
|
|
|
|
if (ret == JOURNAL_ERR_max_in_flight &&
|
|
track_event_change(&c->times[BCH_TIME_blocked_journal_max_in_flight], true)) {
|
|
|
|
struct printbuf buf = PRINTBUF;
|
|
prt_printf(&buf, "seq %llu\n", journal_cur_seq(j));
|
|
bch2_journal_bufs_to_text(&buf, j);
|
|
trace_journal_entry_full(c, buf.buf);
|
|
printbuf_exit(&buf);
|
|
count_event(c, journal_entry_full);
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
|
|
if (closure_wait_event_timeout(&j->async_wait,
|
|
(ret = __journal_res_get(j, res, flags)) != -BCH_ERR_journal_res_get_blocked ||
|
|
(flags & JOURNAL_RES_GET_NONBLOCK),
|
|
HZ * 10))
|
|
return ret;
|
|
|
|
struct bch_fs *c = container_of(j, struct bch_fs, journal);
|
|
struct printbuf buf = PRINTBUF;
|
|
bch2_journal_debug_to_text(&buf, j);
|
|
bch_err(c, "Journal stuck? Waited for 10 seconds...\n%s",
|
|
buf.buf);
|
|
printbuf_exit(&buf);
|
|
|
|
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, true);
|
|
} 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, true);
|
|
|
|
spin_unlock(&j->lock);
|
|
|
|
/*
|
|
* We're called from bch2_journal_flush_seq() -> wait_event();
|
|
* but this might block. We won't usually block, so we won't
|
|
* livelock:
|
|
*/
|
|
sched_annotate_sleep();
|
|
ret = bch2_journal_res_get(j, &res, jset_u64s(0), 0);
|
|
if (ret)
|
|
return ret;
|
|
|
|
seq = res.seq;
|
|
buf = journal_seq_to_buf(j, seq);
|
|
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, or if we promised it
|
|
* wouldn't be 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, unsigned task_state)
|
|
{
|
|
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_state(j->wait,
|
|
(ret2 = bch2_journal_flush_seq_async(j, seq, NULL)),
|
|
task_state);
|
|
|
|
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), TASK_UNINTERRUPTIBLE);
|
|
}
|
|
|
|
/*
|
|
* 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 flush already in flight, or flush requseted */
|
|
if (buf->must_flush)
|
|
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, TASK_UNINTERRUPTIBLE);
|
|
}
|
|
|
|
/* 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;
|
|
|
|
/* We're inside wait_event(), but using mutex_lock(: */
|
|
sched_annotate_sleep();
|
|
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, true);
|
|
|
|
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,
|
|
BCH_DATA_journal, 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, BTREE_TRIGGER_transactional));
|
|
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,
|
|
BTREE_TRIGGER_transactional));
|
|
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, bool new_fs)
|
|
{
|
|
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, new_fs, 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, true);
|
|
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)
|
|
{
|
|
if (!test_bit(JOURNAL_running, &j->flags))
|
|
return;
|
|
|
|
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);
|
|
cancel_delayed_work_sync(&j->write_work);
|
|
|
|
WARN(!bch2_journal_error(j) &&
|
|
test_bit(JOURNAL_replay_done, &j->flags) &&
|
|
j->last_empty_seq != journal_cur_seq(j),
|
|
"journal shutdown error: cur seq %llu but last empty seq %llu",
|
|
journal_cur_seq(j), j->last_empty_seq);
|
|
|
|
if (!bch2_journal_error(j))
|
|
clear_bit(JOURNAL_running, &j->flags);
|
|
}
|
|
|
|
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;
|
|
u64 last_seq = cur_seq, nr, seq;
|
|
|
|
genradix_for_each_reverse(&c->journal_entries, iter, _i) {
|
|
i = *_i;
|
|
|
|
if (journal_replay_ignore(i))
|
|
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 (journal_replay_ignore(i))
|
|
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;
|
|
darray_for_each(i->ptrs, ptr)
|
|
bch2_dev_list_add_dev(&p->devs, ptr->dev);
|
|
|
|
had_entries = true;
|
|
}
|
|
|
|
if (!had_entries)
|
|
j->last_empty_seq = cur_seq - 1; /* to match j->seq */
|
|
|
|
spin_lock(&j->lock);
|
|
|
|
set_bit(JOURNAL_running, &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)
|
|
{
|
|
struct journal_device *ja = &ca->journal;
|
|
|
|
for (unsigned i = 0; i < ARRAY_SIZE(ja->bio); i++) {
|
|
kfree(ja->bio[i]);
|
|
ja->bio[i] = NULL;
|
|
}
|
|
|
|
kfree(ja->buckets);
|
|
kfree(ja->bucket_seq);
|
|
ja->buckets = NULL;
|
|
ja->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);
|
|
|
|
ja->nr = 0;
|
|
|
|
if (journal_buckets_v2) {
|
|
unsigned nr = bch2_sb_field_journal_v2_nr_entries(journal_buckets_v2);
|
|
|
|
for (unsigned 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;
|
|
|
|
unsigned nr_bvecs = DIV_ROUND_UP(JOURNAL_ENTRY_SIZE_MAX, PAGE_SIZE);
|
|
|
|
for (unsigned i = 0; i < ARRAY_SIZE(ja->bio); i++) {
|
|
ja->bio[i] = kmalloc(struct_size(ja->bio[i], bio.bi_inline_vecs,
|
|
nr_bvecs), GFP_KERNEL);
|
|
if (!ja->bio[i])
|
|
return -BCH_ERR_ENOMEM_dev_journal_init;
|
|
|
|
ja->bio[i]->ca = ca;
|
|
ja->bio[i]->buf_idx = i;
|
|
bio_init(&ja->bio[i]->bio, NULL, ja->bio[i]->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 dst = 0;
|
|
|
|
for (unsigned i = 0; i < nr; i++)
|
|
for (unsigned 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 (unsigned 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)
|
|
{
|
|
if (j->wq)
|
|
destroy_workqueue(j->wq);
|
|
|
|
darray_exit(&j->early_journal_entries);
|
|
|
|
for (unsigned i = 0; i < ARRAY_SIZE(j->buf); i++)
|
|
kvfree(j->buf[i].data);
|
|
free_fifo(&j->pin);
|
|
}
|
|
|
|
int bch2_fs_journal_init(struct journal *j)
|
|
{
|
|
static struct lock_class_key res_key;
|
|
|
|
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 (unsigned i = 0; i < ARRAY_SIZE(j->buf); i++) {
|
|
j->buf[i].buf_size = JOURNAL_ENTRY_SIZE_MIN;
|
|
j->buf[i].data = kvmalloc(j->buf[i].buf_size, GFP_KERNEL);
|
|
if (!j->buf[i].data)
|
|
return -BCH_ERR_ENOMEM_journal_buf;
|
|
j->buf[i].idx = i;
|
|
}
|
|
|
|
j->pin.front = j->pin.back = 1;
|
|
|
|
j->wq = alloc_workqueue("bcachefs_journal",
|
|
WQ_HIGHPRI|WQ_FREEZABLE|WQ_UNBOUND|WQ_MEM_RECLAIM, 512);
|
|
if (!j->wq)
|
|
return -BCH_ERR_ENOMEM_fs_other_alloc;
|
|
return 0;
|
|
}
|
|
|
|
/* debug: */
|
|
|
|
static const char * const bch2_journal_flags_strs[] = {
|
|
#define x(n) #n,
|
|
JOURNAL_FLAGS()
|
|
#undef x
|
|
NULL
|
|
};
|
|
|
|
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;
|
|
|
|
printbuf_tabstops_reset(out);
|
|
printbuf_tabstop_push(out, 28);
|
|
out->atomic++;
|
|
|
|
rcu_read_lock();
|
|
s = READ_ONCE(j->reservations);
|
|
|
|
prt_printf(out, "flags:\t");
|
|
prt_bitflags(out, bch2_journal_flags_strs, j->flags);
|
|
prt_newline(out);
|
|
prt_printf(out, "dirty journal entries:\t%llu/%llu\n", fifo_used(&j->pin), j->pin.size);
|
|
prt_printf(out, "seq:\t%llu\n", journal_cur_seq(j));
|
|
prt_printf(out, "seq_ondisk:\t%llu\n", j->seq_ondisk);
|
|
prt_printf(out, "last_seq:\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%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%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, "blocked:\t%u\n", j->blocked);
|
|
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");
|
|
|
|
switch (s.cur_entry_offset) {
|
|
case JOURNAL_ENTRY_ERROR_VAL:
|
|
prt_printf(out, "error\n");
|
|
break;
|
|
case JOURNAL_ENTRY_CLOSED_VAL:
|
|
prt_printf(out, "closed\n");
|
|
break;
|
|
default:
|
|
prt_printf(out, "%u/%u\n", s.cur_entry_offset, j->cur_entry_u64s);
|
|
break;
|
|
}
|
|
|
|
prt_printf(out, "unwritten entries:\n");
|
|
bch2_journal_bufs_to_text(out, j);
|
|
|
|
prt_printf(out, "space:\n");
|
|
printbuf_indent_add(out, 2);
|
|
prt_printf(out, "discarded\t%u:%u\n",
|
|
j->space[journal_space_discarded].next_entry,
|
|
j->space[journal_space_discarded].total);
|
|
prt_printf(out, "clean ondisk\t%u:%u\n",
|
|
j->space[journal_space_clean_ondisk].next_entry,
|
|
j->space[journal_space_clean_ondisk].total);
|
|
prt_printf(out, "clean\t%u:%u\n",
|
|
j->space[journal_space_clean].next_entry,
|
|
j->space[journal_space_clean].total);
|
|
prt_printf(out, "total\t%u:%u\n",
|
|
j->space[journal_space_total].next_entry,
|
|
j->space[journal_space_total].total);
|
|
printbuf_indent_sub(out, 2);
|
|
|
|
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);
|
|
printbuf_indent_add(out, 2);
|
|
prt_printf(out, "nr\t%u\n", ja->nr);
|
|
prt_printf(out, "bucket size\t%u\n", ca->mi.bucket_size);
|
|
prt_printf(out, "available\t%u:%u\n", bch2_journal_dev_buckets_available(j, ja, journal_space_discarded), ja->sectors_free);
|
|
prt_printf(out, "discard_idx\t%u\n", ja->discard_idx);
|
|
prt_printf(out, "dirty_ondisk\t%u (seq %llu)\n",ja->dirty_idx_ondisk, ja->bucket_seq[ja->dirty_idx_ondisk]);
|
|
prt_printf(out, "dirty_idx\t%u (seq %llu)\n", ja->dirty_idx, ja->bucket_seq[ja->dirty_idx]);
|
|
prt_printf(out, "cur_idx\t%u (seq %llu)\n", ja->cur_idx, ja->bucket_seq[ja->cur_idx]);
|
|
printbuf_indent_sub(out, 2);
|
|
}
|
|
|
|
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;
|
|
|
|
spin_lock(&j->lock);
|
|
if (!test_bit(JOURNAL_running, &j->flags)) {
|
|
spin_unlock(&j->lock);
|
|
return true;
|
|
}
|
|
|
|
*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\n", *seq, atomic_read(&pin_list->count));
|
|
printbuf_indent_add(out, 2);
|
|
|
|
for (unsigned 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\n", pin, pin->flush);
|
|
|
|
if (!list_empty(&pin_list->flushed))
|
|
prt_printf(out, "flushed:\n");
|
|
|
|
list_for_each_entry(pin, &pin_list->flushed, list)
|
|
prt_printf(out, "\t%px %ps\n", pin, pin->flush);
|
|
|
|
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++;
|
|
}
|