What: /sys/block/rnbd/rnbd/unmap_device Date: Feb 2020 KernelVersion: 5.7 Contact: Jack Wang Danil Kipnis Description: To unmap a volume, "normal" or "force" has to be written to: /sys/block/rnbd/rnbd/unmap_device When "normal" is used, the operation will fail with EBUSY if any process is using the device. When "force" is used, the device is also unmapped when device is in use. All I/Os that are in progress will fail. Example:: # echo "normal" > /sys/block/rnbd0/rnbd/unmap_device What: /sys/block/rnbd/rnbd/state Date: Feb 2020 KernelVersion: 5.7 Contact: Jack Wang Danil Kipnis Description: The file contains the current state of the block device. The state file returns "open" when the device is successfully mapped from the server and accepting I/O requests. When the connection to the server gets disconnected in case of an error (e.g. link failure), the state file returns "closed" and all I/O requests submitted to it will fail with -EIO. What: /sys/block/rnbd/rnbd/session Date: Feb 2020 KernelVersion: 5.7 Contact: Jack Wang Danil Kipnis Description: RNBD uses RTRS session to transport the data between client and server. The entry "session" contains the name of the session, that was used to establish the RTRS session. It's the same name that was passed as server parameter to the map_device entry. What: /sys/block/rnbd/rnbd/mapping_path Date: Feb 2020 KernelVersion: 5.7 Contact: Jack Wang Danil Kipnis Description: Contains the path that was passed as "device_path" to the map_device operation. What: /sys/block/rnbd/rnbd/access_mode Date: Feb 2020 KernelVersion: 5.7 Contact: Jack Wang Danil Kipnis Description: Contains the device access mode: ro, rw or migration. What: /sys/block/rnbd/rnbd/resize Date: Feb 2020 KernelVersion: 5.7 Contact: Jack Wang Danil Kipnis Description: Write the number of sectors to change the size of the disk. What: /sys/block/rnbd/rnbd/remap_device Date: Feb 2020 KernelVersion: 5.7 Contact: Jack Wang Danil Kipnis Description: Remap the disconnected device if the session is not destroyed yet. What: /sys/block/rnbd/rnbd/nr_poll_queues Date: Feb 2020 KernelVersion: 5.7 Contact: Jack Wang Danil Kipnis Description: Contains the number of poll-mode queues