projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| dfc5606d YS |
1 | What: /sys/bus/rbd/ |
| 2 | Date: November 2010 | |
| 55b00bae | 3 | Contact: Yehuda Sadeh <yehuda@newdream.net>, |
| dfc5606d YS |
4 | Sage Weil <sage@newdream.net> |
| 5 | Description: | |
| 6 | ||
| 7 | Being used for adding and removing rbd block devices. | |
| 8 | ||
| 9 | Usage: <mon ip addr> <options> <pool name> <rbd image name> [snap name] | |
| 10 | ||
| 11 | $ echo "192.168.0.1 name=admin rbd foo" > /sys/bus/rbd/add | |
| 12 | ||
| 13 | The snapshot name can be "-" or omitted to map the image read/write. A <dev-id> | |
| 14 | will be assigned for any registered block device. If snapshot is used, it will | |
| 15 | be mapped read-only. | |
| 16 | ||
| 17 | Removal of a device: | |
| 18 | ||
| 19 | $ echo <dev-id> > /sys/bus/rbd/remove | |
| 20 | ||
| 21 | Entries under /sys/bus/rbd/devices/<dev-id>/ | |
| 22 | -------------------------------------------- | |
| 23 | ||
| 24 | client_id | |
| 25 | ||
| 26 | The ceph unique client id that was assigned for this specific session. | |
| 27 | ||
| 34b13184 AE |
28 | features |
| 29 | ||
| 30 | A hexadecimal encoding of the feature bits for this image. | |
| 31 | ||
| dfc5606d YS |
32 | major |
| 33 | ||
| 34 | The block device major number. | |
| 35 | ||
| 36 | name | |
| 37 | ||
| 38 | The name of the rbd image. | |
| 39 | ||
| 589d30e0 AE |
40 | image_id |
| 41 | ||
| 42 | The unique id for the rbd image. (For rbd image format 1 | |
| 43 | this is empty.) | |
| 44 | ||
| dfc5606d YS |
45 | pool |
| 46 | ||
| 9bb2f334 AE |
47 | The name of the storage pool where this rbd image resides. |
| 48 | An rbd image name is unique within its pool. | |
| 49 | ||
| 50 | pool_id | |
| 51 | ||
| 52 | The unique identifier for the rbd image's pool. This is | |
| 53 | a permanent attribute of the pool. A pool's id will never | |
| 54 | change. | |
| dfc5606d YS |
55 | |
| 56 | size | |
| 57 | ||
| 58 | The size (in bytes) of the mapped block device. | |
| 59 | ||
| 60 | refresh | |
| 61 | ||
| 62 | Writing to this file will reread the image header data and set | |
| 63 | all relevant datastructures accordingly. | |
| 64 | ||
| 65 | current_snap | |
| 66 | ||
| 67 | The current snapshot for which the device is mapped. | |
| 68 | ||
| dfc5606d YS |
69 | snap_* |
| 70 | ||
| 71 | A directory per each snapshot | |
| 72 | ||
| 86b00e0d AE |
73 | parent |
| 74 | ||
| 75 | Information identifying the pool, image, and snapshot id for | |
| 76 | the parent image in a layered rbd image (format 2 only). | |
| dfc5606d YS |
77 | |
| 78 | Entries under /sys/bus/rbd/devices/<dev-id>/snap_<snap-name> | |
| 79 | ------------------------------------------------------------- | |
| 80 | ||
| b7f6519e | 81 | snap_id |
| dfc5606d YS |
82 | |
| 83 | The rados internal snapshot id assigned for this snapshot | |
| 84 | ||
| b7f6519e | 85 | snap_size |
| dfc5606d YS |
86 | |
| 87 | The size of the image when this snapshot was taken. | |
| 88 | ||
| 34b13184 AE |
89 | snap_features |
| 90 | ||
| 91 | A hexadecimal encoding of the feature bits for this snapshot. | |
| dfc5606d | 92 |