What: /sys/block/rnbd<N>/rnbd/unmap_device
Date: Feb 2020
KernelVersion: 5.7
Contact: Jack Wang <[email protected]> Danil Kipnis <[email protected]>
Description: To unmap a volume, "normal" or "force" has to be written to:
/sys/block/rnbd<N>/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<N>/rnbd/state
Date: Feb 2020
KernelVersion: 5.7
Contact: Jack Wang <[email protected]> Danil Kipnis <[email protected]>
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<N>/rnbd/session
Date: Feb 2020
KernelVersion: 5.7
Contact: Jack Wang <[email protected]> Danil Kipnis <[email protected]>
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<N>/rnbd/mapping_path
Date: Feb 2020
KernelVersion: 5.7
Contact: Jack Wang <[email protected]> Danil Kipnis <[email protected]>
Description: Contains the path that was passed as "device_path" to the map_device
operation.
What: /sys/block/rnbd<N>/rnbd/access_mode
Date: Feb 2020
KernelVersion: 5.7
Contact: Jack Wang <[email protected]> Danil Kipnis <[email protected]>
Description: Contains the device access mode: ro, rw or migration.
What: /sys/block/rnbd<N>/rnbd/resize
Date: Feb 2020
KernelVersion: 5.7
Contact: Jack Wang <[email protected]> Danil Kipnis <[email protected]>
Description: Write the number of sectors to change the size of the disk.
What: /sys/block/rnbd<N>/rnbd/remap_device
Date: Feb 2020
KernelVersion: 5.7
Contact: Jack Wang <[email protected]> Danil Kipnis <[email protected]>
Description: Remap the disconnected device if the session is not destroyed yet.
What: /sys/block/rnbd<N>/rnbd/nr_poll_queues
Date: Feb 2020
KernelVersion: 5.7
Contact: Jack Wang <[email protected]> Danil Kipnis <[email protected]>
Description: Contains the number of poll-mode queues
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