bcachefs: Start moving debug info from sysfs to debugfs

In sysfs, files can only output at most PAGE_SIZE. This is a problem for
debug info that needs to list an arbitrary number of times, and because
of this limit some of our debug info has been terser and harder to read
than we'd like.

This patch moves info about journal pins and cached btree nodes to
debugfs, and greatly expands and improves the output we return.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>

1 files changed, 0 insertions, 27 deletions

diff --git a/fs/bcachefs/btree_io.c b/fs/bcachefs/btree_io.c
index 06704299640d..fd7f2a78473c 100644
--- a/fs/bcachefs/btree_io.c
+++ b/fs/bcachefs/btree_io.c
@@ -2106,30 +2106,3 @@ void bch2_btree_flush_all_writes(struct bch_fs *c)
 {
 	__bch2_btree_flush_all(c, BTREE_NODE_write_in_flight);
 }
-
-void bch2_dirty_btree_nodes_to_text(struct printbuf *out, struct bch_fs *c)
-{
-	struct bucket_table *tbl;
-	struct rhash_head *pos;
-	struct btree *b;
-	unsigned i;
-
-	rcu_read_lock();
-	for_each_cached_btree(b, c, tbl, i, pos) {
-		unsigned long flags = READ_ONCE(b->flags);
-
-		if (!(flags & (1 << BTREE_NODE_dirty)))
-			continue;
-
-		pr_buf(out, "%p d %u n %u l %u w %u b %u r %u:%lu\n",
-		       b,
-		       (flags & (1 << BTREE_NODE_dirty)) != 0,
-		       (flags & (1 << BTREE_NODE_need_write)) != 0,
-		       b->c.level,
-		       b->written,
-		       !list_empty_careful(&b->write_blocked),
-		       b->will_make_reachable != 0,
-		       b->will_make_reachable & 1);
-	}
-	rcu_read_unlock();
-}