| What: /sys/bus/rbd/ |
| Date: November 2010 |
| Contact: Yehuda Sadeh <yehuda@newdream.net>, |
| Sage Weil <sage@newdream.net> |
| Description: |
| |
| Being used for adding and removing rbd block devices. |
| |
| Usage: <mon ip addr> <options> <pool name> <rbd image name> [snap name] |
| |
| $ echo "192.168.0.1 name=admin rbd foo" > /sys/bus/rbd/add |
| |
| The snapshot name can be "-" or omitted to map the image read/write. A <dev-id> |
| will be assigned for any registered block device. If snapshot is used, it will |
| be mapped read-only. |
| |
| Removal of a device: |
| |
| $ echo <dev-id> > /sys/bus/rbd/remove |
| |
| Entries under /sys/bus/rbd/devices/<dev-id>/ |
| -------------------------------------------- |
| |
| client_id |
| |
| The ceph unique client id that was assigned for this specific session. |
| |
| features |
| |
| A hexadecimal encoding of the feature bits for this image. |
| |
| major |
| |
| The block device major number. |
| |
| name |
| |
| The name of the rbd image. |
| |
| image_id |
| |
| The unique id for the rbd image. (For rbd image format 1 |
| this is empty.) |
| |
| pool |
| |
| The name of the storage pool where this rbd image resides. |
| An rbd image name is unique within its pool. |
| |
| pool_id |
| |
| The unique identifier for the rbd image's pool. This is |
| a permanent attribute of the pool. A pool's id will never |
| change. |
| |
| size |
| |
| The size (in bytes) of the mapped block device. |
| |
| refresh |
| |
| Writing to this file will reread the image header data and set |
| all relevant datastructures accordingly. |
| |
| current_snap |
| |
| The current snapshot for which the device is mapped. |
| |
| parent |
| |
| Information identifying the pool, image, and snapshot id for |
| the parent image in a layered rbd image (format 2 only). |
