From a3581ca35d2b7e854e071dec2df7de7152aaa5c3 Mon Sep 17 00:00:00 2001
From: Kent Overstreet <kent.overstreet@linux.dev>
Date: Thu, 26 Sep 2024 15:59:29 -0400
Subject: [PATCH] bcachefs: Fix BCH_TRANS_COMMIT_skip_accounting_apply
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>
---
fs/bcachefs/btree_trans_commit.c | 36 ++++++++++++++++++--------------
1 file changed, 20 insertions(+), 16 deletions(-)
diff --git a/fs/bcachefs/btree_trans_commit.c b/fs/bcachefs/btree_trans_commit.c
index 0989e2da6e56d..1a74a1a252ee2 100644
--- a/fs/bcachefs/btree_trans_commit.c
+++ b/fs/bcachefs/btree_trans_commit.c
@@ -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);
-
- 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);
-
- a->k.bversion = journal_pos_to_bversion(&trans->journal_res,
- (u64 *) entry - (u64 *) trans->journal_entries);
- BUG_ON(bversion_zero(a->k.bversion));
+ 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 (entry->type == BCH_JSET_ENTRY_write_buffer_keys &&
+ entry->start->k.type == KEY_TYPE_accounting) {
+ BUG_ON(!trans->journal_res.ref);
+
+ 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)) {
--
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