Bases: PluginBase
Bases: NodeBase
Main creation driver
This is the main driver function. After the graph is
linearised, each node has it’s create()
function called.
Exception – A failure should raise an exception. This
will initiate a rollback. See Nodebase.add_rollback()
.
None
Cleanup actions
Actions to taken when dib-block-device delete
is called.
This is the cleanup path in case of a reported external
failure. The nodes are called in the reverse order to
create()
None
Insert all edges
The dependency edge is created in all cases from the base
element (typically a mkfs) and, if this is not the ‘first’
mount-point, an edge is created from the mount-point before in
“sorted order” (see sort_mount_points()
). This ensures
that during mounting (and umounting) the globally correct
order is used.
Sort comparision function for mount-point sorting
See if this
comes before other
in mount-order list. In
words: if the other mount-point has us as it’s parent, we come
before it (are less than it). e.g. /var < /var/log <
/var/log/foo
this – tuple of mount_point, node name
other – tuple of mount_point, node name
cmp value
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