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bcachefs: Fix bch2_btree_iter_peek_slot() error path

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iter->k needs to be consistent with iter->pos - required for
bch2_btree_iter_(rewind|advance) to work correctly.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
This commit is contained in:
Kent Overstreet 2022-08-17 17:49:12 -04:00 committed by Kent Overstreet
parent 8192f8a586
commit 23dfb3a2f7
1 changed files with 8 additions and 3 deletions
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9
fs/bcachefs/btree_iter.c
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@ -2844,8 +2844,10 @@ struct bkey_s_c bch2_btree_iter_peek_slot(struct btree_iter *iter)
iter->flags & BTREE_ITER_INTENT);
ret = bch2_btree_path_traverse(trans, iter->path, iter->flags);
if (unlikely(ret))
return bkey_s_c_err(ret);
if (unlikely(ret)) {
k = bkey_s_c_err(ret);
goto out_no_locked;
}
if ((iter->flags & BTREE_ITER_CACHED) ||
!(iter->flags & (BTREE_ITER_IS_EXTENTS|BTREE_ITER_FILTER_SNAPSHOTS))) {
@ -2895,6 +2897,9 @@ struct bkey_s_c bch2_btree_iter_peek_slot(struct btree_iter *iter)
struct bpos pos = iter->pos;
k = bch2_btree_iter_peek(iter);
if (unlikely(bkey_err(k)))
bch2_btree_iter_set_pos(iter, pos);
else
iter->pos = pos;
}