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bcachefs: Fix BCH_TRANS_COMMIT_skip_accounting_apply

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This was added to avoid double-counting accounting keys in journal
replay. But applied incorrectly (easily done since it applies to the
transaction commit, not a particular update), it leads to skipping
in-mem accounting for real accounting updates, and failure to give them
a version number - which leads to journal replay becoming very confused
the next time around.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2024-09-26 15:59:29 -04:00
parent f8911ad88d
commit a3581ca35d
1 changed files with 18 additions and 14 deletions
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32
fs/bcachefs/btree_trans_commit.c
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@ -700,27 +700,31 @@ bch2_trans_commit_write_locked(struct btree_trans *trans, unsigned flags,
struct jset_entry *entry = trans->journal_entries;
if (likely(!(flags & BCH_TRANS_COMMIT_skip_accounting_apply))) {
percpu_down_read(&c->mark_lock);
percpu_down_read(&c->mark_lock);
for (entry = trans->journal_entries;
entry != (void *) ((u64 *) trans->journal_entries + trans->journal_entries_u64s);
entry = vstruct_next(entry))
if (jset_entry_is_key(entry) && entry->start->k.type == KEY_TYPE_accounting) {
struct bkey_i_accounting *a = bkey_i_to_accounting(entry->start);
for (entry = trans->journal_entries;
entry != (void *) ((u64 *) trans->journal_entries + trans->journal_entries_u64s);
entry = vstruct_next(entry))
if (entry->type == BCH_JSET_ENTRY_write_buffer_keys &&
entry->start->k.type == KEY_TYPE_accounting) {
BUG_ON(!trans->journal_res.ref);
a->k.bversion = journal_pos_to_bversion(&trans->journal_res,
(u64 *) entry - (u64 *) trans->journal_entries);
BUG_ON(bversion_zero(a->k.bversion));
struct bkey_i_accounting *a = bkey_i_to_accounting(entry->start);
a->k.bversion = journal_pos_to_bversion(&trans->journal_res,
(u64 *) entry - (u64 *) trans->journal_entries);
BUG_ON(bversion_zero(a->k.bversion));
if (likely(!(flags & BCH_TRANS_COMMIT_skip_accounting_apply))) {
ret = bch2_accounting_mem_mod_locked(trans, accounting_i_to_s_c(a), BCH_ACCOUNTING_normal);
if (ret)
goto revert_fs_usage;
}
percpu_up_read(&c->mark_lock);
}
percpu_up_read(&c->mark_lock);
/* XXX: we only want to run this if deltas are nonzero */
bch2_trans_account_disk_usage_change(trans);
}
/* XXX: we only want to run this if deltas are nonzero */
bch2_trans_account_disk_usage_change(trans);
trans_for_each_update(trans, i)
if (btree_node_type_has_atomic_triggers(i->bkey_type)) {