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- 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.
- Usage: <dev-id> [force]
- $ echo 2 > /sys/bus/rbd/remove
- Optional "force" argument which when passed will wait for running requests and
- then unmap the image. Requests sent to the driver after initiating the removal
- will be failed. (August 2016, since 4.9.)
- What: /sys/bus/rbd/add_single_major
- Date: December 2013
- KernelVersion: 3.14
- Contact: Sage Weil <sage@inktank.com>
- Description: Available only if rbd module is inserted with single_major
- parameter set to true.
- Usage is the same as for /sys/bus/rbd/add. If present,
- should be used instead of the latter: any attempts to use
- /sys/bus/rbd/add if /sys/bus/rbd/add_single_major is
- available will fail for backwards compatibility reasons.
- What: /sys/bus/rbd/remove_single_major
- Date: December 2013
- KernelVersion: 3.14
- Contact: Sage Weil <sage@inktank.com>
- Description: Available only if rbd module is inserted with single_major
- parameter set to true.
- Usage is the same as for /sys/bus/rbd/remove. If present,
- should be used instead of the latter: any attempts to use
- /sys/bus/rbd/remove if /sys/bus/rbd/remove_single_major is
- available will fail for backwards compatibility reasons.
- Entries under /sys/bus/rbd/devices/<dev-id>/
- --------------------------------------------
- client_addr
- The ceph unique client entity_addr_t (address + nonce).
- The format is <address>:<port>/<nonce>: '1.2.3.4:1234/5678' or
- '[1:2:3:4:5:6:7:8]:1234/5678'. (August 2016, since 4.9.)
- client_id
- The ceph unique client id that was assigned for this specific session.
- cluster_fsid
- The ceph cluster UUID. (August 2016, since 4.9.)
- config_info
- The string written into /sys/bus/rbd/add{,_single_major}. (August
- 2016, since 4.9.)
- features
- A hexadecimal encoding of the feature bits for this image.
- major
- The block device major number.
- minor
- The block device minor number. (December 2013, since 3.14.)
- 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.
- snap_id
- The current snapshot's id. (August 2016, since 4.9.)
- parent
- Information identifying the chain of parent images in a layered rbd
- image. Entries are separated by empty lines.
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