What: /sys/bus/rbd/add Date: Oct, 2010 KernelVersion: v2.6.37 Contact: Sage Weil Description: (WO) Add rbd block device. Usage: [] $ 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 will be assigned for any registered block device. If snapshot is used, it will be mapped read-only. What: /sys/bus/rbd/remove Date: Oct, 2010 KernelVersion: v2.6.37 Contact: Sage Weil Description: (WO) Remove rbd block device. Usage: [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: Dec, 2013 KernelVersion: v3.14 Contact: Sage Weil Description: (WO) 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, this 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: Dec, 2013 KernelVersion: v3.14 Contact: Sage Weil Description: (WO) 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, this 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. What: /sys/bus/rbd/supported_features Date: Mar, 2017 KernelVersion: v4.11 Contact: Sage Weil Description: (RO) Displays the features supported by the rbd module so that userspace can generate meaningful error messages and spell out unsupported features that need to be disabled. What: /sys/bus/rbd/devices//size What: /sys/bus/rbd/devices//major What: /sys/bus/rbd/devices//client_id What: /sys/bus/rbd/devices//pool What: /sys/bus/rbd/devices//name What: /sys/bus/rbd/devices//refresh What: /sys/bus/rbd/devices//current_snap Date: Oct, 2010 KernelVersion: v2.6.37 Contact: Sage Weil Description: size: (RO) The size (in bytes) of the mapped block device. major: (RO) The block device major number. client_id: (RO) The ceph unique client id that was assigned for this specific session. pool: (RO) The name of the storage pool where this rbd image resides. An rbd image name is unique within its pool. name: (RO) The name of the rbd image. refresh: (WO) Writing to this file will reread the image header data and set all relevant data structures accordingly. current_snap: (RO) The current snapshot for which the device is mapped. What: /sys/bus/rbd/devices//pool_id Date: Jul, 2012 KernelVersion: v3.6 Contact: Sage Weil Description: (RO) The unique identifier for the rbd image's pool. This is a permanent attribute of the pool. A pool's id will never change. What: /sys/bus/rbd/devices//image_id What: /sys/bus/rbd/devices//features Date: Oct, 2012 KernelVersion: v3.7 Contact: Sage Weil Description: image_id: (RO) The unique id for the rbd image. (For rbd image format 1 this is empty.) features: (RO) A hexadecimal encoding of the feature bits for this image. What: /sys/bus/rbd/devices//parent Date: Nov, 2012 KernelVersion: v3.8 Contact: Sage Weil Description: (RO) Information identifying the chain of parent images in a layered rbd image. Entries are separated by empty lines. What: /sys/bus/rbd/devices//minor Date: Dec, 2013 KernelVersion: v3.14 Contact: Sage Weil Description: (RO) The block device minor number. What: /sys/bus/rbd/devices//snap_id What: /sys/bus/rbd/devices//config_info What: /sys/bus/rbd/devices//cluster_fsid What: /sys/bus/rbd/devices//client_addr Date: Aug, 2016 KernelVersion: v4.9 Contact: Sage Weil Description: snap_id: (RO) The current snapshot's id. config_info: (RO) The string written into /sys/bus/rbd/add{,_single_major}. cluster_fsid: (RO) The ceph cluster UUID. client_addr: (RO) The ceph unique client entity_addr_t (address + nonce). The format is
:/: '1.2.3.4:1234/5678' or '[1:2:3:4:5:6:7:8]:1234/5678'.