[Kimchi-devel] [PATCH 4/8] Update get_disk_xml() to get the device same according to bus and index values
Aline Manera
alinefm at linux.vnet.ibm.com
Thu Oct 30 12:26:16 UTC 2014
When generating the disk XML, the most common information to generate the
device name are: 1) the bus - to identify the right prefix, and 2) the disk
index.
Add this logic to get_disk_xml() so when no 'dev' name is specified the
device name will be automatically generated according to bus and index
value.
Signed-off-by: Aline Manera <alinefm at linux.vnet.ibm.com>
---
src/kimchi/model/storagevolumes.py | 6 ++--
src/kimchi/model/vmstorages.py | 67 ++++++++++++++++++--------------------
src/kimchi/xmlutils/disk.py | 25 +++++++++-----
3 files changed, 51 insertions(+), 47 deletions(-)
diff --git a/src/kimchi/model/storagevolumes.py b/src/kimchi/model/storagevolumes.py
index db596c3..9ff43e6 100644
--- a/src/kimchi/model/storagevolumes.py
+++ b/src/kimchi/model/storagevolumes.py
@@ -32,7 +32,7 @@ from kimchi.model.storagepools import StoragePoolModel
from kimchi.model.tasks import TaskModel
from kimchi.model.vms import VMsModel, VMModel
from kimchi.utils import add_task, kimchi_log
-from kimchi.xmlutils.disk import get_vm_disk_info, get_vm_disk_list
+from kimchi.xmlutils.disk import get_vm_disk_info, get_vm_disks
from kimchi.xmlutils.utils import xpath_get_text
@@ -265,8 +265,8 @@ class StorageVolumeModel(object):
vms = VMsModel.get_vms(self.conn)
for vm in vms:
dom = VMModel.get_vm(vm, self.conn)
- storages = get_vm_disk_list(dom)
- for disk in storages:
+ storages = get_vm_disks(dom)
+ for disk in storages.keys():
d_info = get_vm_disk_info(dom, disk)
if path == d_info['path']:
ref_cnt = ref_cnt + 1
diff --git a/src/kimchi/model/vmstorages.py b/src/kimchi/model/vmstorages.py
index 3a8b6b3..b3b1514 100644
--- a/src/kimchi/model/vmstorages.py
+++ b/src/kimchi/model/vmstorages.py
@@ -31,10 +31,9 @@ from kimchi.model.utils import get_vm_config_flag
from kimchi.utils import check_url_path
from kimchi.osinfo import lookup
from kimchi.xmlutils.disk import get_device_node, get_disk_xml
-from kimchi.xmlutils.disk import get_vm_disk_info, get_vm_disk_list
+from kimchi.xmlutils.disk import get_vm_disk_info, get_vm_disks
HOTPLUG_TYPE = ['scsi', 'virtio']
-PREFIX_MAP = {'ide': 'hd', 'virtio': 'vd', 'scsi': 'sd'}
def _get_device_bus(dev_type, dom):
@@ -95,14 +94,28 @@ class VMStoragesModel(object):
return dict(address=address)
def create(self, vm_name, params):
- dom = VMModel.get_vm(vm_name, self.conn)
- params['bus'] = _get_device_bus(params['type'], dom)
- self._get_storage_device_name(vm_name, params)
# Path will never be blank due to API.json verification.
# There is no need to cover this case here.
- params['format'] = 'raw'
if not ('vol' in params) ^ ('path' in params):
raise InvalidParameter("KCHVMSTOR0017E")
+
+ dom = VMModel.get_vm(vm_name, self.conn)
+ params['bus'] = _get_device_bus(params['type'], dom)
+ params['format'] = 'raw'
+
+ dev_list = [dev for dev, bus in get_vm_disks(dom).iteritems()
+ if bus == params['bus']]
+ dev_list.sort()
+ if len(dev_list) == 0:
+ params['index'] = 0
+ else:
+ char = dev_list.pop()[2]
+ params['index'] = string.ascii_lowercase.index(char) + 1
+
+ if (params['bus'] not in HOTPLUG_TYPE
+ and DOM_STATE_MAP[dom.info()[0]] != 'shutoff'):
+ raise InvalidOperation('KCHVMSTOR0011E')
+
if params.get('vol'):
try:
pool = params['pool']
@@ -119,48 +132,30 @@ class VMStoragesModel(object):
supported_format = {
"disk": ["raw", "bochs", "qcow", "qcow2", "qed", "vmdk"],
"cdrom": "iso"}
- if vol_info['format'] in supported_format[params['type']]:
- if params['type'] == 'disk':
- params['format'] = vol_info['format']
- else:
+ if vol_info['format'] not in supported_format[params['type']]:
raise InvalidParameter("KCHVMSTOR0018E",
{"format": vol_info['format'],
"type": params['type']})
- params['path'] = vol_info['path']
- if (params['bus'] not in HOTPLUG_TYPE
- and DOM_STATE_MAP[dom.info()[0]] != 'shutoff'):
- raise InvalidOperation('KCHVMSTOR0011E')
+ if params['type'] == 'disk':
+ params['format'] = vol_info['format']
+
+ params['path'] = vol_info['path']
params.update(self._get_available_bus_address(params['bus'], vm_name))
# Add device to VM
- dev_xml = get_disk_xml(_check_path(params['path']), params)
+ dev, xml = get_disk_xml(_check_path(params['path']), params)
try:
conn = self.conn.get()
dom = conn.lookupByName(vm_name)
- dom.attachDeviceFlags(dev_xml, get_vm_config_flag(dom, 'all'))
+ dom.attachDeviceFlags(xml, get_vm_config_flag(dom, 'all'))
except Exception as e:
raise OperationFailed("KCHVMSTOR0008E", {'error': e.message})
- return params['dev']
-
- def _get_storage_device_name(self, vm_name, params):
- bus_prefix = PREFIX_MAP[params['bus']]
- dev_list = [dev for dev in self.get_list(vm_name)
- if dev.startswith(bus_prefix)]
- if len(dev_list) == 0:
- params['dev'] = bus_prefix + 'a'
- else:
- dev_list.sort()
- last_dev = dev_list.pop()
- # TODO: Improve to device names "greater then" hdz
- next_dev_letter_pos =\
- string.ascii_lowercase.index(last_dev[2]) + 1
- params['dev'] =\
- bus_prefix + string.ascii_lowercase[next_dev_letter_pos]
+ return dev
def get_list(self, vm_name):
dom = VMModel.get_vm(vm_name, self.conn)
- return get_vm_disk_list(dom)
+ return get_vm_disks(dom).keys()
class VMStorageModel(object):
@@ -207,11 +202,11 @@ class VMStorageModel(object):
dev_info = self.lookup(vm_name, dev_name)
if dev_info['type'] != 'cdrom':
raise InvalidOperation("KCHVMSTOR0006E")
- dev_info.update(params)
- xml = get_disk_xml(src_type, dev_info, ignore_source)
+ dev_info.update(params)
+ dev, xml = get_disk_xml(src_type, dev_info, ignore_source)
try:
dom.updateDeviceFlags(xml, get_vm_config_flag(dom, 'all'))
except Exception as e:
raise OperationFailed("KCHVMSTOR0009E", {'error': e.message})
- return dev_name
+ return dev
diff --git a/src/kimchi/xmlutils/disk.py b/src/kimchi/xmlutils/disk.py
index 800a64c..aadbfb8 100644
--- a/src/kimchi/xmlutils/disk.py
+++ b/src/kimchi/xmlutils/disk.py
@@ -19,6 +19,7 @@
import lxml.etree as ET
import socket
+import string
import urlparse
from lxml import objectify
@@ -26,6 +27,7 @@ from lxml.builder import E
from kimchi.exception import NotFoundError
+BUS_TO_DEV_MAP = {'ide': 'hd', 'virtio': 'vd', 'scsi': 'sd'}
DEV_TYPE_SRC_ATTR_MAP = {'file': 'file', 'block': 'dev'}
@@ -42,7 +44,11 @@ def get_disk_xml(src_type, params, ignore_src=False):
"""
disk = E.disk(type=src_type, device=params['type'])
disk.append(E.driver(name='qemu', type=params['format']))
- disk.append(E.target(dev=params['dev'], bus=params['bus']))
+
+ # Get device name according to bus and index values
+ dev = params.get('dev', (BUS_TO_DEV_MAP[params['bus']] +
+ string.lowercase[params.get('index', 0)]))
+ disk.append(E.target(dev=dev, bus=params['bus']))
if params.get('address'):
# ide disk target id is always '0'
@@ -52,7 +58,7 @@ def get_disk_xml(src_type, params, ignore_src=False):
unit=params['address']['unit']))
if ignore_src:
- return ET.tostring(disk, encoding='utf-8', pretty_print=True)
+ return (dev, ET.tostring(disk, encoding='utf-8', pretty_print=True))
if src_type == 'network':
"""
@@ -73,7 +79,7 @@ def get_disk_xml(src_type, params, ignore_src=False):
source.set(DEV_TYPE_SRC_ATTR_MAP[src_type], params['path'])
disk.append(source)
- return ET.tostring(disk, encoding='utf-8', pretty_print=True)
+ return (dev, ET.tostring(disk, encoding='utf-8', pretty_print=True))
def get_device_node(dom, dev_name):
@@ -116,11 +122,14 @@ def get_vm_disk_info(dom, dev_name):
'bus': disk.target.attrib['bus']}
-def get_vm_disk_list(dom):
+def get_vm_disks(dom):
xml = dom.XMLDesc(0)
devices = objectify.fromstring(xml).devices
- storages = [disk.target.attrib['dev']
- for disk in devices.xpath("./disk[@device='disk']")]
- storages += [disk.target.attrib['dev']
- for disk in devices.xpath("./disk[@device='cdrom']")]
+
+ storages = {}
+ all_disks = devices.xpath("./disk[@device='disk']")
+ all_disks.extend(devices.xpath("./disk[@device='cdrom']"))
+ for disk in all_disks:
+ storages[disk.target.attrib['dev']] = disk.target.attrib['bus']
+
return storages
--
1.9.3
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