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Code Issues Releases Wiki Activity

Check and fix corrupt Qemu disk images. Fixes #2301.

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This commit is contained in:
grossmj 2017-11-16 14:54:37 +07:00
parent 135c529d4b
commit 967798a7de
1 changed files with 33 additions and 10 deletions
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43
gns3server/compute/qemu/qemu_vm.py
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@ -32,6 +32,7 @@ import gns3server
import subprocess
from gns3server.utils import parse_version
from gns3server.utils.asyncio import subprocess_check_output
from .qemu_error import QemuError
from ..adapters.ethernet_adapter import EthernetAdapter
from ..nios.nio_udp import NIOUDP
@ -1360,6 +1361,15 @@ class QemuVM(BaseNode):
return qemu_img_path
@asyncio.coroutine
def _qemu_img_exec(self, command):
command_string = " ".join(shlex.quote(s) for s in command)
log.info("Executing qemu-img with: {}".format(command_string))
process = yield from asyncio.create_subprocess_exec(*command)
retcode = yield from process.wait()
log.info("{} returned with {}".format(self._get_qemu_img(), retcode))
return retcode
@asyncio.coroutine
def _disk_options(self):
options = []
@ -1381,29 +1391,42 @@ class QemuVM(BaseNode):
raise QemuError("{} disk image '{}' linked to '{}' is not accessible".format(disk_name, disk_image, os.path.realpath(disk_image)))
else:
raise QemuError("{} disk image '{}' is not accessible".format(disk_name, disk_image))
else:
try:
# check for corrupt disk image
retcode = yield from self._qemu_img_exec([qemu_img_path, "check", disk_image])
if retcode == 3:
# image has leaked clusters, but is not corrupted, let's try to fix it
log.warning("Qemu image {} has leaked clusters".format(disk_image))
if (yield from self._qemu_img_exec([qemu_img_path, "check", "-r", "leaks", "{}".format(disk_image)])) == 3:
self.project.emit("log.warning", {"message": "Qemu image '{}' has leaked clusters and could not be fixed".format(disk_image)})
elif retcode == 2:
# image is corrupted, let's try to fix it
log.warning("Qemu image {} is corrupted".format(disk_image))
if (yield from self._qemu_img_exec([qemu_img_path, "check", "-r", "all", "{}".format(disk_image)])) == 2:
self.project.emit("log.warning", {"message": "Qemu image '{}' is corrupted and could not be fixed".format(disk_image)})
except (OSError, subprocess.SubprocessError) as e:
raise QemuError("Could not check '{}' disk image: {}".format(disk_name, e))
if self.linked_clone:
disk = os.path.join(self.working_dir, "{}_disk.qcow2".format(disk_name))
if not os.path.exists(disk):
# create the disk
try:
command = [qemu_img_path, "create", "-o", "backing_file={}".format(disk_image), "-f", "qcow2", disk]
command_string = " ".join(shlex.quote(s) for s in command)
log.info("Executing qemu-img with: {}".format(command_string))
process = yield from asyncio.create_subprocess_exec(*command)
retcode = yield from process.wait()
if retcode is not None and retcode != 0:
raise QemuError("Could not create {} disk image: qemu-img returned with {}".format(disk_name,
retcode = yield from self._qemu_img_exec(command)
if retcode:
raise QemuError("Could not create '{}' disk image: qemu-img returned with {}".format(disk_name,
retcode))
log.info("{} returned with {}".format(qemu_img_path, retcode))
except (OSError, subprocess.SubprocessError) as e:
raise QemuError("Could not create {} disk image: {}".format(disk_name, e))
raise QemuError("Could not create '{}' disk image: {}".format(disk_name, e))
else:
# The disk exists we check if the clone work
# The disk exists we check if the clone works
try:
qcow2 = Qcow2(disk)
yield from qcow2.rebase(qemu_img_path, disk_image)
except (Qcow2Error, OSError) as e:
raise QemuError("Could not use qcow2 disk image {} for {} {}".format(disk_image, disk_name, e))
raise QemuError("Could not use qcow2 disk image '{}' for {} {}".format(disk_image, disk_name, e))
else:
disk = disk_image