bcachefs: Create lost+found in correct snapshot

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

fs/bcachefs/fsck.c

@@ -283,11 +283,17 @@ static int lookup_lostfound(struct btree_trans *trans, u32 snapshot,
 	return ret;
 
 create_lostfound:
+	/*
+	 * we always create lost+found in the root snapshot; we don't want
+	 * different branches of the snapshot tree to have different lost+found
+	 */
+	snapshot = le32_to_cpu(st.root_snapshot);
 	/*
 	 * XXX: we could have a nicer log message here  if we had a nice way to
 	 * walk backpointers to print a path
 	 */
-	bch_notice(c, "creating lost+found in snapshot %u", le32_to_cpu(st.root_snapshot));
+	bch_notice(c, "creating lost+found in subvol %llu snapshot %u",
+		   root_inum.subvol, le32_to_cpu(st.root_snapshot));
 
 	u64 now = bch2_current_time(c);
 	struct btree_iter lostfound_iter = { NULL };