Revision 06c2fb4a lib/backend.py
| b/lib/backend.py | ||
|---|---|---|
| 2700 | 2700 |
_Fail("Failed to grow block device: %s", err, exc=True)
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| 2701 | 2701 |
|
| 2702 | 2702 |
|
| 2703 |
def BlockdevSnapshot(disk): |
|
| 2703 |
def BlockdevSnapshot(disk, snapshot_name=None):
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|
| 2704 | 2704 |
"""Create a snapshot copy of a block device. |
| 2705 | 2705 |
|
| 2706 | 2706 |
This function is called recursively, and the snapshot is actually created |
| ... | ... | |
| 2717 | 2717 |
_Fail("DRBD device '%s' without backing storage cannot be snapshotted",
|
| 2718 | 2718 |
disk.unique_id) |
| 2719 | 2719 |
return BlockdevSnapshot(disk.children[0]) |
| 2720 |
elif disk.dev_type == constants.LD_LV: |
|
| 2720 |
elif disk.dev_type == constants.LD_LV and not snapshot_name:
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|
| 2721 | 2721 |
r_dev = _RecursiveFindBD(disk) |
| 2722 | 2722 |
if r_dev is not None: |
| 2723 | 2723 |
# FIXME: choose a saner value for the snapshot size |
| ... | ... | |
| 2725 | 2725 |
return r_dev.Snapshot(disk.size) |
| 2726 | 2726 |
else: |
| 2727 | 2727 |
_Fail("Cannot find block device %s", disk)
|
| 2728 |
elif disk.dev_type == constants.DT_EXT: |
|
| 2729 |
r_dev = _RecursiveFindBD(disk) |
|
| 2730 |
if r_dev is not None: |
|
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r_dev.Snapshot(snapshot_name) |
|
| 2732 |
else: |
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_Fail("Cannot find block device %s", disk)
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|
| 2728 | 2734 |
else: |
| 2729 | 2735 |
_Fail("Cannot snapshot non-lvm block device '%s' of type '%s'",
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| 2730 | 2736 |
disk.unique_id, disk.dev_type) |
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