1 files changed, 25 insertions, 0 deletions
diff --git a/fs/bcachefs/lru_format.h b/fs/bcachefs/lru_format.h
new file mode 100644
index 000000000000..f372cb3b8cda
--- /dev/null
+++ b/fs/bcachefs/lru_format.h
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _BCACHEFS_LRU_FORMAT_H
+#define _BCACHEFS_LRU_FORMAT_H
+
+struct bch_lru {
+	struct bch_val		v;
+	__le64			idx;
+} __packed __aligned(8);
+
+#define BCH_LRU_TYPES()		\
+	x(read)			\
+	x(fragmentation)
+
+enum bch_lru_type {
+#define x(n) BCH_LRU_##n,
+	BCH_LRU_TYPES()
+#undef x
+};
+
+#define BCH_LRU_FRAGMENTATION_START	((1U << 16) - 1)
+
+#define LRU_TIME_BITS			48
+#define LRU_TIME_MAX			((1ULL << LRU_TIME_BITS) - 1)
+
+#endif /* _BCACHEFS_LRU_FORMAT_H */