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QEMU config disk - get rid of mtoolsrc

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This commit is contained in:
Bernhard Ehlers 2020-04-15 20:50:59 +02:00 committed by grossmj
parent 5c44268476
commit 450c6cddc7
1 changed files with 26 additions and 17 deletions
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43
gns3server/compute/qemu/qemu_vm.py
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@ -26,6 +26,7 @@ import re
import shlex
import math
import shutil
import struct
import asyncio
import socket
import gns3server
@ -1628,11 +1629,26 @@ class QemuVM(BaseNode):
log.info("{} returned with {}".format(self._get_qemu_img(), retcode))
return retcode
async def _mcopy(self, *args):
env = os.environ
env["MTOOLSRC"] = 'mtoolsrc'
async def _mcopy(self, image, *args):
try:
process = await asyncio.create_subprocess_exec("mcopy", *args, stdin=subprocess.DEVNULL, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, cwd=self.working_dir, env=env)
# read offset of first partition from MBR
with open(image, "rb") as img_file:
mbr = img_file.read(512)
part_type, offset, signature = struct.unpack("<450xB3xL52xH", mbr)
if signature != 0xAA55:
log.error("mcopy failure: {}: invalid MBR".format(image))
return 1
if part_type not in (1, 4, 6, 11, 12, 14):
log.error("mcopy failure: {}: invalid partition type {:02X}"
.format(image, part_type))
return 1
part_image = image + "@@{}S".format(offset)
process = await asyncio.create_subprocess_exec(
"mcopy", "-i", part_image, *args,
stdin=subprocess.DEVNULL,
stdout=subprocess.PIPE, stderr=subprocess.STDOUT,
cwd=self.working_dir)
(stdout, _) = await process.communicate()
retcode = process.returncode
except (OSError, subprocess.SubprocessError) as e:
@ -1648,8 +1664,10 @@ class QemuVM(BaseNode):
async def _export_config(self):
disk_name = getattr(self, "config_disk_name")
if not disk_name or \
not os.path.exists(os.path.join(self.working_dir, disk_name)):
if not disk_name:
return
disk = os.path.join(self.working_dir, disk_name)
if not os.path.exists(disk):
return
config_dir = os.path.join(self.working_dir, "configs")
zip_file = os.path.join(self.working_dir, "config.zip")
@ -1658,7 +1676,7 @@ class QemuVM(BaseNode):
os.mkdir(config_dir)
if os.path.exists(zip_file):
os.remove(zip_file)
if await self._mcopy("-s", "-m", "-n", "--", "x:/", config_dir) == 0:
if await self._mcopy(disk, "-s", "-m", "-n", "--", "::/", config_dir) == 0:
pack_zip(zip_file, config_dir)
except OSError as e:
log.error("Can't export config: {}".format(e))
@ -1680,7 +1698,7 @@ class QemuVM(BaseNode):
config_files = [os.path.join(config_dir, fname)
for fname in os.listdir(config_dir)]
if config_files:
if await self._mcopy("-s", "-m", "-o", "--", *config_files, "x:/") != 0:
if await self._mcopy(disk, "-s", "-m", "-o", "--", *config_files, "::/") != 0:
os.remove(disk)
os.remove(zip_file)
except OSError as e:
@ -1795,15 +1813,6 @@ class QemuVM(BaseNode):
shutil.copyfile(disk_image, disk)
except OSError as e:
raise QemuError("Could not create '{}' disk image: {}".format(disk_name, e))
mtoolsrc = os.path.join(self.working_dir, "mtoolsrc")
if not os.path.exists(mtoolsrc):
try:
with open(mtoolsrc, 'w') as outfile:
outfile.write('drive x:\n')
outfile.write(' file="{}"\n'.format(disk))
outfile.write(' partition=1\n')
except OSError as e:
raise QemuError("Could not create 'mtoolsrc': {}".format(e))
options.extend(self._disk_interface_options(disk, 3, interface, "raw"))
return options