Revision 3a9fe2bc lib/backend.py
| b/lib/backend.py | ||
|---|---|---|
| 2678 | 2678 |
_Fail("Failed to grow block device: %s", err, exc=True)
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| 2679 | 2679 |
|
| 2680 | 2680 |
|
| 2681 |
def BlockdevSnapshot(disk): |
|
| 2681 |
def BlockdevSnapshot(disk, snapshot_name=None):
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|
| 2682 | 2682 |
"""Create a snapshot copy of a block device. |
| 2683 | 2683 |
|
| 2684 | 2684 |
This function is called recursively, and the snapshot is actually created |
| ... | ... | |
| 2695 | 2695 |
_Fail("DRBD device '%s' without backing storage cannot be snapshotted",
|
| 2696 | 2696 |
disk.unique_id) |
| 2697 | 2697 |
return BlockdevSnapshot(disk.children[0]) |
| 2698 |
elif disk.dev_type == constants.LD_LV: |
|
| 2698 |
elif disk.dev_type == constants.LD_LV and not snapshot_name:
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|
| 2699 | 2699 |
r_dev = _RecursiveFindBD(disk) |
| 2700 | 2700 |
if r_dev is not None: |
| 2701 | 2701 |
# FIXME: choose a saner value for the snapshot size |
| ... | ... | |
| 2703 | 2703 |
return r_dev.Snapshot(disk.size) |
| 2704 | 2704 |
else: |
| 2705 | 2705 |
_Fail("Cannot find block device %s", disk)
|
| 2706 |
elif disk.dev_type == constants.DT_EXT: |
|
| 2707 |
r_dev = _RecursiveFindBD(disk) |
|
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if r_dev is not None: |
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r_dev.Snapshot(snapshot_name) |
|
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else: |
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_Fail("Cannot find block device %s", disk)
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|
| 2706 | 2712 |
else: |
| 2707 | 2713 |
_Fail("Cannot snapshot non-lvm block device '%s' of type '%s'",
|
| 2708 | 2714 |
disk.unique_id, disk.dev_type) |
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