bcachefs: Fix insert_snapshot_whiteouts()

 - We were failing to set the key type on the whiteouts it was creating,
   oops.

 - Also, we need to create whiteouts when generating front splits, not
   just back splits.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

1 files changed, 7 insertions, 0 deletions

diff --git a/fs/bcachefs/subvolume.h b/fs/bcachefs/subvolume.h
index 65f108a83835..7c488c3d78e0 100644
--- a/fs/bcachefs/subvolume.h
+++ b/fs/bcachefs/subvolume.h
@@ -68,6 +68,13 @@ static inline bool bch2_snapshot_is_ancestor(struct bch_fs *c, u32 id, u32 ances
 	return id == ancestor;
 }
 
+static inline bool bch2_snapshot_has_children(struct bch_fs *c, u32 id)
+{
+	struct snapshot_t *t = snapshot_t(c, id);
+
+	return (t->children[0]|t->children[1]) != 0;
+}
+
 static inline bool snapshot_list_has_id(snapshot_id_list *s, u32 id)
 {
 	u32 *i;