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bcachefs: Ensure bch2_trans_get_iter() returns iters with correct locks

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Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet
2019-08-12 14:35:34 -04:00
committed by Kent Overstreet
parent c8b18c37b2
commit 1904a65a31
1 changed files with 7 additions and 1 deletions
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8
fs/bcachefs/btree_iter.c
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@@ -86,7 +86,7 @@ void __bch2_btree_node_lock_write(struct btree *b, struct btree_iter *iter)
struct btree_iter *linked;
unsigned readers = 0;
EBUG_ON(btree_node_read_locked(iter, b->c.level));
EBUG_ON(!btree_node_intent_locked(iter, b->c.level));
trans_for_each_iter(iter->trans, linked)
if (linked->l[b->c.level].b == b &&
@@ -1779,6 +1779,12 @@ static struct btree_iter *__btree_trans_get_iter(struct btree_trans *trans,
iter->flags &= ~(BTREE_ITER_INTENT|BTREE_ITER_PREFETCH);
iter->flags |= flags & (BTREE_ITER_INTENT|BTREE_ITER_PREFETCH);
if ((iter->flags & BTREE_ITER_INTENT) &&
!bch2_btree_iter_upgrade(iter, 1)) {
trace_trans_restart_upgrade(trans->ip);
return ERR_PTR(-EINTR);
}
}
BUG_ON(iter->btree_id != btree_id);