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95 lines
2.6 KiB
95 lines
2.6 KiB
# -*- coding: utf-8 -*-
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#
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# Copyright (C) 2015 GNS3 Technologies Inc.
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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"""
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VPCS server module.
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"""
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import os
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import asyncio
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from ..base_manager import BaseManager
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from .vpcs_error import VPCSError
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from .vpcs_vm import VPCSVM
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class VPCS(BaseManager):
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_VM_CLASS = VPCSVM
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def __init__(self):
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super().__init__()
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self._free_mac_ids = {}
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self._used_mac_ids = {}
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@asyncio.coroutine
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def create_vm(self, *args, **kwargs):
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"""
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Creates a new VPCS VM.
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:returns: VPCSVM instance
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"""
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vm = yield from super().create_vm(*args, **kwargs)
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self._free_mac_ids.setdefault(vm.project.id, list(range(0, 255)))
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try:
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self._used_mac_ids[vm.id] = self._free_mac_ids[vm.project.id].pop(0)
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except IndexError:
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raise VPCSError("Cannot create a new VPCS VM (limit of 255 VMs reached on this host)")
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return vm
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@asyncio.coroutine
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def close_vm(self, vm_id, *args, **kwargs):
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"""
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Closes a VPCS VM.
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:returns: VPCSVM instance
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"""
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vm = self.get_vm(vm_id)
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if vm_id in self._used_mac_ids:
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i = self._used_mac_ids[vm_id]
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self._free_mac_ids[vm.project.id].insert(0, i)
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del self._used_mac_ids[vm_id]
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yield from super().close_vm(vm_id, *args, **kwargs)
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return vm
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def get_mac_id(self, vm_id):
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"""
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Get an unique VPCS MAC id (offset)
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:param vm_id: VPCS VM identifier
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:returns: VPCS MAC identifier
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"""
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return self._used_mac_ids.get(vm_id, 1)
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@staticmethod
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def get_legacy_vm_workdir(legacy_vm_id, name):
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"""
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Returns the name of the legacy working directory name for a VM.
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:param legacy_vm_id: legacy VM identifier (integer)
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:param name: VM name (not used)
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:returns: working directory name
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"""
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return os.path.join("vpcs", "pc-{}".format(legacy_vm_id))
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