Revision 7d81bb8b lib/backend.py
| b/lib/backend.py | ||
|---|---|---|
| 3044 | 3044 |
_Fail("Failed to grow block device: %s", err, exc=True)
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| 3045 | 3045 |
|
| 3046 | 3046 |
|
| 3047 |
def BlockdevSnapshot(disk): |
|
| 3047 |
def BlockdevSnapshot(disk, snapshot_name=None):
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|
| 3048 | 3048 |
"""Create a snapshot copy of a block device. |
| 3049 | 3049 |
|
| 3050 | 3050 |
This function is called recursively, and the snapshot is actually created |
| ... | ... | |
| 3061 | 3061 |
_Fail("DRBD device '%s' without backing storage cannot be snapshotted",
|
| 3062 | 3062 |
disk.unique_id) |
| 3063 | 3063 |
return BlockdevSnapshot(disk.children[0]) |
| 3064 |
elif disk.dev_type == constants.DT_PLAIN: |
|
| 3064 |
elif disk.dev_type == constants.DT_PLAIN and not snapshot_name:
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|
| 3065 | 3065 |
r_dev = _RecursiveFindBD(disk) |
| 3066 | 3066 |
if r_dev is not None: |
| 3067 | 3067 |
# FIXME: choose a saner value for the snapshot size |
| ... | ... | |
| 3069 | 3069 |
return r_dev.Snapshot(disk.size) |
| 3070 | 3070 |
else: |
| 3071 | 3071 |
_Fail("Cannot find block device %s", disk)
|
| 3072 |
elif disk.dev_type == constants.DT_EXT: |
|
| 3073 |
r_dev = _RecursiveFindBD(disk) |
|
| 3074 |
if r_dev is not None: |
|
| 3075 |
r_dev.Snapshot(snapshot_name) |
|
| 3076 |
else: |
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_Fail("Cannot find block device %s", disk)
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|
| 3072 | 3078 |
else: |
| 3073 | 3079 |
_Fail("Cannot snapshot non-lvm block device '%s' of type '%s'",
|
| 3074 | 3080 |
disk.unique_id, disk.dev_type) |
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