1 files changed, 66 insertions, 0 deletions
diff --git a/drivers/staging/zcache/ramster/debug.c b/drivers/staging/zcache/ramster/debug.c
new file mode 100644
index 00000000000..bf34133cc63
--- /dev/null
+++ b/drivers/staging/zcache/ramster/debug.c
@@ -0,0 +1,66 @@
+#include <linux/atomic.h>
+#include "debug.h"
+
+#ifdef CONFIG_DEBUG_FS
+#include <linux/debugfs.h>
+
+ssize_t ramster_eph_pages_remoted;
+ssize_t ramster_pers_pages_remoted;
+ssize_t ramster_eph_pages_remote_failed;
+ssize_t ramster_pers_pages_remote_failed;
+ssize_t ramster_remote_eph_pages_succ_get;
+ssize_t ramster_remote_pers_pages_succ_get;
+ssize_t ramster_remote_eph_pages_unsucc_get;
+ssize_t ramster_remote_pers_pages_unsucc_get;
+ssize_t ramster_pers_pages_remote_nomem;
+ssize_t ramster_remote_objects_flushed;
+ssize_t ramster_remote_object_flushes_failed;
+ssize_t ramster_remote_pages_flushed;
+ssize_t ramster_remote_page_flushes_failed;
+
+#define ATTR(x)  { .name = #x, .val = &ramster_##x, }
+static struct debug_entry {
+	const char *name;
+	ssize_t *val;
+} attrs[] = {
+	ATTR(eph_pages_remoted),
+	ATTR(pers_pages_remoted),
+	ATTR(eph_pages_remote_failed),
+	ATTR(pers_pages_remote_failed),
+	ATTR(remote_eph_pages_succ_get),
+	ATTR(remote_pers_pages_succ_get),
+	ATTR(remote_eph_pages_unsucc_get),
+	ATTR(remote_pers_pages_unsucc_get),
+	ATTR(pers_pages_remote_nomem),
+	ATTR(remote_objects_flushed),
+	ATTR(remote_pages_flushed),
+	ATTR(remote_object_flushes_failed),
+	ATTR(remote_page_flushes_failed),
+	ATTR(foreign_eph_pages),
+	ATTR(foreign_eph_pages_max),
+	ATTR(foreign_pers_pages),
+	ATTR(foreign_pers_pages_max),
+};
+#undef ATTR
+
+int __init ramster_debugfs_init(void)
+{
+	int i;
+	struct dentry *root = debugfs_create_dir("ramster", NULL);
+	if (root == NULL)
+		return -ENXIO;
+
+	for (i = 0; i < ARRAY_SIZE(attrs); i++)
+		if (!debugfs_create_size_t(attrs[i].name,
+				S_IRUGO, root, attrs[i].val))
+			goto out;
+	return 0;
+out:
+	return -ENODEV;
+}
+#else
+static inline int ramster_debugfs_init(void)
+{
+	return 0;
+}
+#endif