bcachefs: Improve journal_entry_btree_keys_to_text()

This improves the formatting of journal_entry_btree_keys_to_text() by
putting each key on its own line.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>

fs/bcachefs/journal_io.c

@@ -298,11 +298,17 @@ static void journal_entry_btree_keys_to_text(struct printbuf *out, struct bch_fs
 					     struct jset_entry *entry)
 {
 	struct bkey_i *k;
+	bool first = true;
 
+	vstruct_for_each(entry, k) {
+		if (!first) {
+			printbuf_newline(out);
+			pr_buf(out, "%s: ", bch2_jset_entry_types[entry->type]);
+		}
 		pr_buf(out, "btree=%s l=%u ", bch2_btree_ids[entry->btree_id], entry->level);
-
-	vstruct_for_each(entry, k)
 		bch2_bkey_val_to_text(out, c, bkey_i_to_s_c(k));
+		first = false;
+	}
 }
 
 static int journal_entry_btree_root_validate(struct bch_fs *c,

fs/bcachefs/util.h

@@ -238,6 +238,7 @@ do {									\
 struct printbuf {
 	char		*pos;
 	char		*end;
+	unsigned	indent;
 };
 
 static inline size_t printbuf_remaining(struct printbuf *buf)
@@ -259,6 +260,27 @@ do {									\
 				 __VA_ARGS__);				\
 } while (0)
 
+static inline void printbuf_indent_push(struct printbuf *buf, unsigned spaces)
+{
+	buf->indent += spaces;
+	while (spaces--)
+		pr_buf(buf, " ");
+}
+
+static inline void printbuf_indent_pop(struct printbuf *buf, unsigned spaces)
+{
+	buf->indent -= spaces;
+}
+
+static inline void printbuf_newline(struct printbuf *buf)
+{
+	unsigned i;
+
+	pr_buf(buf, "\n");
+	for (i = 0; i < buf->indent; i++)
+		pr_buf(buf, " ");
+}
+
 void bch_scnmemcpy(struct printbuf *, const char *, size_t);
 
 int bch2_strtoint_h(const char *, int *);