in case the insertion fails, raise Invalid_argument
this leads to more sane failure behaviour, and also cleans up resources in case
vmm_resources.insert_vm fails (or cpuset/open of the fifo, create_process)
vmmc now has more subcommands
- policy [-n name] returns all policies in name and below
- add_policy [-n name] [--cpu cpuid] [--mem mem] [--bridge bridge] [--block size] adds a policy
- remove [-n name] removes policy at name
policy is just the same which is in vmm_req_delegation, and vmm_resources now check them:
- you cannot insert a subpolicy violating the prefix
- you cannot insert a policy which would forbid current resource usage
- you cannot insert a policy with which any subpolicy would be invalid
- you can adjust (increase/decrease) a policy if the above invariants are kept
implement "force create" directly in vmmd: much nicer to
- check resource constraints,
- kill vm potentially,
- and create a new vm,
all as single transaction.
