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# Copyright (C) 2013, 2014 Red Hat, Inc.
#
# This work is licensed under the GNU GPLv2 or later.
# See the COPYING file in the top-level directory.
import os
import tempfile
import pytest
import virtinst
from virtinst import DeviceDisk
from tests import utils
def test_disk_numtotarget():
# Various testing our target generation
#
# Note: using single quotes in strings to avoid
# codespell flagging the 'ba' assert
assert DeviceDisk.num_to_target(1) == 'a'
assert DeviceDisk.num_to_target(2) == 'b'
assert DeviceDisk.num_to_target(26) == 'z'
assert DeviceDisk.num_to_target(27) == 'aa'
assert DeviceDisk.num_to_target(28) == 'ab'
assert DeviceDisk.num_to_target(52) == 'az'
assert DeviceDisk.num_to_target(53) == 'ba'
assert DeviceDisk.num_to_target(27 * 26) == 'zz'
assert DeviceDisk.num_to_target(27 * 26 + 1) == 'aaa'
assert DeviceDisk.target_to_num('hda') == 0
assert DeviceDisk.target_to_num('hdb') == 1
assert DeviceDisk.target_to_num('sdz') == 25
assert DeviceDisk.target_to_num('sdaa') == 26
assert DeviceDisk.target_to_num('vdab') == 27
assert DeviceDisk.target_to_num('vdaz') == 51
assert DeviceDisk.target_to_num('xvdba') == 52
assert DeviceDisk.target_to_num('xvdzz') == 26 * (25 + 1) + 25
assert DeviceDisk.target_to_num('xvdaaa') == 26 * 26 * 1 + 26 * 1 + 0
conn = utils.URIs.open_testdefault_cached()
disk = virtinst.DeviceDisk(conn)
disk.bus = 'ide'
assert disk.generate_target([]) == 'hda'
assert disk.generate_target(['hda']) == 'hdb'
assert disk.generate_target(['hdb', 'sda']) == 'hdc'
assert disk.generate_target(['hda', 'hdd']) == 'hdb'
def test_disk_dir_searchable(monkeypatch):
# Normally the dir searchable test is skipped in the test suite,
# but let's contrive an example that should trigger all the code
# to ensure it isn't horribly broken
conn = utils.URIs.open_kvm()
def _set_caps_baselabel_uid(uid):
secmodel = [s for s in conn.caps.host.secmodels
if s.model == "dac"][0]
for baselabel in [b for b in secmodel.baselabels
if b.type in ["qemu", "kvm"]]:
baselabel.content = "+%s:+%s" % (uid, uid)
tmpobj = tempfile.TemporaryDirectory(prefix="virtinst-test-search")
tmpdir = tmpobj.name
try:
# path="" should trigger early return
searchdata = virtinst.DeviceDisk.check_path_search(conn, "")
assert searchdata.uid is None
# path=None should trigger early return
searchdata = virtinst.DeviceDisk.check_path_search(conn, None)
assert searchdata.uid is None
# Invalid uid
_set_caps_baselabel_uid(-1)
searchdata = virtinst.DeviceDisk.check_path_search(conn, tmpdir)
assert searchdata.uid is None
# Use our uid, verify it shows we have expected access
_set_caps_baselabel_uid(os.getuid())
searchdata = virtinst.DeviceDisk.check_path_search(conn,
tmpdir + "/footest")
assert searchdata.uid == os.getuid()
# pylint: disable=use-implicit-booleaness-not-comparison
assert searchdata.fixlist == []
# Remove perms on the tmpdir, now it should report failures
os.chmod(tmpdir, 0o000)
searchdata = virtinst.DeviceDisk.check_path_search(conn, tmpdir)
assert searchdata.fixlist == [tmpdir]
errdict = virtinst.DeviceDisk.fix_path_search(searchdata)
assert not bool(errdict)
# Mock setfacl to definitely fail
with monkeypatch.context() as m:
m.setattr("virtinst.diskbackend.SETFACL", "getfacl")
errdict = virtinst.DeviceDisk.fix_path_search(searchdata)
finally:
# Reset changes we made
conn.invalidate_caps()
os.chmod(tmpdir, 0o777)
def test_disk_path_in_use_kernel():
# Extra tests for DeviceDisk.path_in_use
conn = utils.URIs.open_kvm()
# Comparing against kernel
vms = virtinst.DeviceDisk.path_in_use_by(
conn, "/pool-dir/test-arm-kernel")
assert vms == ["test-arm-kernel"]
def test_disk_diskbackend_misc():
# Test get_size() with vol_install
conn = utils.URIs.open_testdefault_cached()
disk = virtinst.DeviceDisk(conn)
pool = conn.storagePoolLookupByName("pool-dir")
vol_install = disk.build_vol_install(conn, "newvol1.img", pool, 1, False)
disk.set_vol_install(vol_install)
assert disk.get_size() == 1.0
# Test some blockdev inspecting
conn = utils.URIs.openconn("test:///default")
if os.path.exists("/dev/loop0"):
disk = virtinst.DeviceDisk(conn)
disk.set_source_path("/dev/loop0")
assert disk.type == "block"
disk.get_size()
# Test sparse cloning
tmpinput = tempfile.NamedTemporaryFile()
open(tmpinput.name, "wb").write(b'\0' * 10000)
srcdisk = virtinst.DeviceDisk(conn)
srcdisk.set_source_path(tmpinput.name)
newdisk = virtinst.DeviceDisk(conn)
tmpoutput = tempfile.NamedTemporaryFile()
os.unlink(tmpoutput.name)
newdisk.set_source_path(tmpoutput.name)
newdisk.set_local_disk_to_clone(srcdisk, True)
newdisk.build_storage(None)
# Test cloning onto existing disk
newdisk = virtinst.DeviceDisk(conn, parsexml=newdisk.get_xml())
newdisk.set_source_path(newdisk.get_source_path())
newdisk.set_local_disk_to_clone(srcdisk, True)
newdisk.build_storage(None)
newdisk = virtinst.DeviceDisk(conn)
newdisk.type = "block"
newdisk.set_source_path("/dev/foo/idontexist")
assert newdisk.get_size() == 0
conn = utils.URIs.open_testdriver_cached()
volpath = "/pool-dir/test-clone-simple.img"
assert virtinst.DeviceDisk.path_definitely_exists(conn, volpath)
disk = virtinst.DeviceDisk(conn)
disk.set_source_path(volpath)
assert disk.get_size()
def test_disk_diskbackend_parse():
# Test that calling validate() on parsed disk XML doesn't attempt
# to verify the path exists. Assume it's a working config
conn = utils.URIs.open_testdriver_cached()
xml = ("<disk type='file' device='disk'>"
"<source file='/A/B/C/D/NOPE'/>"
"</disk>")
disk = virtinst.DeviceDisk(conn, parsexml=xml)
disk.validate()
disk.is_size_conflict()
disk.build_storage(None)
assert getattr(disk, "_storage_backend").is_stub() is True
# Stub backend coverage testing
backend = getattr(disk, "_storage_backend")
assert disk.get_parent_pool() is None
assert disk.get_vol_object() is None
assert disk.get_vol_install() is None
assert disk.get_size() == 0
assert backend.get_vol_xml() is None
assert backend.get_dev_type() == "file"
assert backend.get_driver_type() is None
assert backend.get_parent_pool() is None
disk.set_backend_for_existing_path()
assert getattr(disk, "_storage_backend").is_stub() is False
with pytest.raises(ValueError):
disk.validate()
# Ensure set_backend_for_existing_path resolves a path
# to its existing storage volume
xml = ("<disk type='file' device='disk'>"
"<source file='/pool-dir/default-vol'/>"
"</disk>")
disk = virtinst.DeviceDisk(conn, parsexml=xml)
disk.set_backend_for_existing_path()
assert disk.get_vol_object()
# Verify set_backend_for_existing_path doesn't error
# for a variety of disks
dom = conn.lookupByName("test-many-devices")
guest = virtinst.Guest(conn, parsexml=dom.XMLDesc(0))
for disk in guest.devices.disk:
disk.set_backend_for_existing_path()
def test_disk_rbd_path():
conn = utils.URIs.open_testdriver_cached()
diskxml1 = """
<disk type="network" device="disk">
<source protocol="rbd" name="rbd-sourcename/some-rbd-vol">
<host name="ceph-mon-1.example.com" port="6789"/>
<host name="ceph-mon-2.example.com" port="6789"/>
<host name="ceph-mon-3.example.com" port="6789"/>
</source>
<target dev="vdag" bus="virtio"/>
</disk>
"""
disk1 = virtinst.DeviceDisk(conn, parsexml=diskxml1)
disk1.set_backend_for_existing_path()
assert disk1.get_vol_object().name() == "some-rbd-vol"
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