Revision 97e3cece lib/backend.py
| b/lib/backend.py | ||
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| 3055 | 3055 |
_Fail("Failed to grow block device: %s", err, exc=True)
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| 3056 | 3056 |
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| 3057 | 3057 |
|
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def BlockdevSnapshot(disk): |
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def BlockdevSnapshot(disk, snap_name, snap_size):
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"""Create a snapshot copy of a block device. |
| 3060 | 3060 |
|
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This function is called recursively, and the snapshot is actually created |
| ... | ... | |
| 3063 | 3063 |
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| 3064 | 3064 |
@type disk: L{objects.Disk}
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| 3065 | 3065 |
@param disk: the disk to be snapshotted |
| 3066 |
@type snap_name: string |
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@param snap_name: the name of the snapshot |
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@type snap_size: int |
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@param snap_size: the size of the snapshot |
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@rtype: string |
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@return: snapshot disk ID as (vg, lv) |
| 3068 | 3072 |
|
| ... | ... | |
| 3078 | 3082 |
if not disk.children: |
| 3079 | 3083 |
_Fail("DRBD device '%s' without backing storage cannot be snapshotted",
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| 3080 | 3084 |
disk.unique_id) |
| 3081 |
return BlockdevSnapshot(disk.children[0]) |
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return BlockdevSnapshot(disk.children[0], snap_name, snap_size)
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| 3082 | 3086 |
elif disk.dev_type == constants.DT_PLAIN: |
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return _DiskSnapshot(disk) |
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return _DiskSnapshot(disk, snap_name, snap_size)
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| 3084 | 3088 |
elif disk.dev_type == constants.DT_EXT: |
| 3085 |
return _DiskSnapshot(disk) |
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return _DiskSnapshot(disk, snap_name, snap_size)
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| 3086 | 3090 |
else: |
| 3087 | 3091 |
_Fail("Cannot snapshot block device '%s' of type '%s'",
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| 3088 | 3092 |
disk.logical_id, disk.dev_type) |
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