What: /sys/block/rnbd<N>/rnbd/unmap_device
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Date: Feb 2020
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KernelVersion: 5.7
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Contact: Jack Wang <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com>
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Description: To unmap a volume, "normal" or "force" has to be written to:
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/sys/block/rnbd<N>/rnbd/unmap_device
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When "normal" is used, the operation will fail with EBUSY if any process
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is using the device. When "force" is used, the device is also unmapped
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when device is in use. All I/Os that are in progress will fail.
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Example::
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# echo "normal" > /sys/block/rnbd0/rnbd/unmap_device
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What: /sys/block/rnbd<N>/rnbd/state
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Date: Feb 2020
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KernelVersion: 5.7
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Contact: Jack Wang <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com>
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Description: The file contains the current state of the block device. The state file
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returns "open" when the device is successfully mapped from the server
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and accepting I/O requests. When the connection to the server gets
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disconnected in case of an error (e.g. link failure), the state file
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returns "closed" and all I/O requests submitted to it will fail with -EIO.
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What: /sys/block/rnbd<N>/rnbd/session
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Date: Feb 2020
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KernelVersion: 5.7
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Contact: Jack Wang <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com>
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Description: RNBD uses RTRS session to transport the data between client and
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server. The entry "session" contains the name of the session, that
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was used to establish the RTRS session. It's the same name that
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was passed as server parameter to the map_device entry.
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What: /sys/block/rnbd<N>/rnbd/mapping_path
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Date: Feb 2020
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KernelVersion: 5.7
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Contact: Jack Wang <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com>
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Description: Contains the path that was passed as "device_path" to the map_device
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operation.
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What: /sys/block/rnbd<N>/rnbd/access_mode
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Date: Feb 2020
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KernelVersion: 5.7
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Contact: Jack Wang <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com>
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Description: Contains the device access mode: ro, rw or migration.
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