| What: /sys/block/rnbd<N>/rnbd/unmap_device |
| Date: Feb 2020 |
| KernelVersion: 5.7 |
| Contact: Jack Wang <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com> |
| 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 <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com> |
| 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 <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com> |
| 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 <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com> |
| 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 <jinpu.wang@cloud.ionos.com> Danil Kipnis <danil.kipnis@cloud.ionos.com> |
| Description: Contains the device access mode: ro, rw or migration. |
