1What: /sys/block/dm-<num>/bow/free 2Date: January 2023 3KernelVersion: 5.15 4Contact: paullawrence@google.com 5Description: free space 6 Free space on device in bytes. Only valid in state 0 7Users: Android vold to determine if there is sufficient space for expected size 8 of checksum 9 10What: /sys/block/dm-<num>/bow/state 11Date: January 2023 12KernelVersion: 5.15 13Contact: paullawrence@google.com 14Description: dm-bow state 15 Read-write string containing 0, 1 or 2 16 0: Trim mode 17 1: Checkpoint mode 18 2: Committed mode 19 See Documentation/device-mapper/dm-bow for details 20