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backups: fix backup header extraction

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Pass only 'qubes.xml.000' to tar2qfile - this way it will stop reading
the source after requested file(s).
This commit is contained in:
Marek Marczykowski-Górecki 2013-11-25 06:31:38 +01:00
parent cc37927080
commit bf6bf8ed8f
1 changed files with 8 additions and 4 deletions
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12
core/backup.py
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@ -769,13 +769,11 @@ def restore_vm_dirs (backup_source, restore_tmpdir, passphrase, vms_dirs, vms,
'-ix%sf' % ("v" if BACKUP_DEBUG else ""), backup_source,
'-C', restore_tmpdir] + vms_dirs
# Remove already processed qubes.xml.000, because qfile-dom0-unpacker will
# refuse to override files
tar1_env = os.environ.copy()
# TODO: add some safety margin?
tar1_env['UPDATES_MAX_BYTES'] = str(vms_size)
# Restoring only header
if len(vms_dirs) == 2 and vms_dirs[0] == 'qubes.xml.000':
if vms_dirs and vms_dirs[0] == 'qubes.xml.000':
tar1_env['UPDATES_MAX_FILES'] = '2'
else:
tar1_env['UPDATES_MAX_FILES'] = '0'
@ -886,10 +884,16 @@ def backup_restore_header(source, passphrase,
if BACKUP_DEBUG:
print "Working in", restore_tmpdir
# tar2qfile matches only beginnings, while tar full path
if appvm:
extract_filter = ['qubes.xml.000']
else:
extract_filter = ['qubes.xml.000', 'qubes.xml.000.hmac']
restore_vm_dirs (source,
restore_tmpdir,
passphrase=passphrase,
vms_dirs=['qubes.xml.000', 'qubes.xml.000.hmac'],
vms_dirs=extract_filter,
vms=None,
vms_size=40000,
print_callback=print_callback,