bcachefs: Add btree cache stats to sysfs

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

diff --git a/fs/bcachefs/btree_cache.c b/fs/bcachefs/btree_cache.c
index 2c8f67fabc5ae7d415313897f54be736548995bc..04c71f11a5555c2ca519049af141f2069abd9033 100644 (file)
--- a/fs/bcachefs/btree_cache.c
+++ b/fs/bcachefs/btree_cache.c
@@ -1065,3 +1065,9 @@ void bch2_btree_node_to_text(struct printbuf *out, struct bch_fs *c,
               stats.floats,
               stats.failed);
 }
+
+void bch2_btree_cache_to_text(struct printbuf *out, struct bch_fs *c)
+{
+       pr_buf(out, "nr nodes:\t%u\n", c->btree_cache.used);
+       pr_buf(out, "nr dirty:\t%u\n", atomic_read(&c->btree_cache.dirty));
+}

diff --git a/fs/bcachefs/btree_cache.h b/fs/bcachefs/btree_cache.h
index 8a19e60e9258014816b6d5a8c4ac54e00587a7f2..e766ef552ce7470f4fb83fbfa915bd044963fafa 100644 (file)
--- a/fs/bcachefs/btree_cache.h
+++ b/fs/bcachefs/btree_cache.h
@@ -100,5 +100,6 @@ static inline unsigned btree_blocks(struct bch_fs *c)
 
 void bch2_btree_node_to_text(struct printbuf *, struct bch_fs *,
                             struct btree *);
+void bch2_btree_cache_to_text(struct printbuf *, struct bch_fs *);
 
 #endif /* _BCACHEFS_BTREE_CACHE_H */

diff --git a/fs/bcachefs/sysfs.c b/fs/bcachefs/sysfs.c
index 89287bfe31a78a1644ad0abb5bff33cb44d48c57..280c28a926dd798dbc60a9d604b1f9fab0aa009c 100644 (file)
--- a/fs/bcachefs/sysfs.c
+++ b/fs/bcachefs/sysfs.c
@@ -165,6 +165,7 @@ read_attribute(journal_debug);
 read_attribute(journal_pins);
 read_attribute(btree_updates);
 read_attribute(dirty_btree_nodes);
+read_attribute(btree_cache);
 read_attribute(btree_key_cache);
 read_attribute(btree_transactions);
 read_attribute(stripes_heap);
@@ -374,6 +375,11 @@ SHOW(bch2_fs)
                return out.pos - buf;
        }
 
+       if (attr == &sysfs_btree_cache) {
+               bch2_btree_cache_to_text(&out, c);
+               return out.pos - buf;
+       }
+
        if (attr == &sysfs_btree_key_cache) {
                bch2_btree_key_cache_to_text(&out, &c->btree_key_cache);
                return out.pos - buf;
@@ -550,6 +556,7 @@ struct attribute *bch2_fs_internal_files[] = {
        &sysfs_journal_pins,
        &sysfs_btree_updates,
        &sysfs_dirty_btree_nodes,
+       &sysfs_btree_cache,
        &sysfs_btree_key_cache,
        &sysfs_btree_transactions,
        &sysfs_stripes_heap,