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 | ||
| 28 | major | |
| 29 | ||
| 30 | The block device major number. | |
| 31 | ||
| 32 | name | |
| 33 | ||
| 34 | The name of the rbd image. | |
| 35 | ||
| 36 | pool | |
| 37 | ||
| 38 | The pool where this rbd image resides. The pool-name pair is unique | |
| 39 | per rados system. | |
| 40 | ||
| 41 | size | |
| 42 | ||
| 43 | The size (in bytes) of the mapped block device. | |
| 44 | ||
| 45 | refresh | |
| 46 | ||
| 47 | Writing to this file will reread the image header data and set | |
| 48 | all relevant datastructures accordingly. | |
| 49 | ||
| 50 | current_snap | |
| 51 | ||
| 52 | The current snapshot for which the device is mapped. | |
| 53 | ||
| 54 | create_snap | |
| 55 | ||
| 56 | Create a snapshot: | |
| 57 | ||
| 58 | $ echo <snap-name> > /sys/bus/rbd/devices/<dev-id>/snap_create | |
| 59 | ||
| dfc5606d YS |
60 | snap_* |
| 61 | ||
| 62 | A directory per each snapshot | |
| 63 | ||
| 64 | ||
| 65 | Entries under /sys/bus/rbd/devices/<dev-id>/snap_<snap-name> | |
| 66 | ------------------------------------------------------------- | |
| 67 | ||
| 68 | id | |
| 69 | ||
| 70 | The rados internal snapshot id assigned for this snapshot | |
| 71 | ||
| 72 | size | |
| 73 | ||
| 74 | The size of the image when this snapshot was taken. | |
| 75 | ||
| 76 |