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backups: compression support

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This commit is contained in:
Marek Marczykowski-Górecki 2013-12-02 14:05:41 +01:00
parent 1939cf7ce8
commit 99b001502a
3 changed files with 42 additions and 8 deletions
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39
core/backup.py
View File

@ -326,8 +326,9 @@ class Send_Worker(Process):
if BACKUP_DEBUG:
print "Finished sending thread"
def backup_do(base_backup_dir, files_to_backup, passphrase,\
progress_callback = None, encrypt=False, appvm=None):
def backup_do(base_backup_dir, files_to_backup, passphrase,
progress_callback = None, encrypt=False, appvm=None,
compress = False):
total_backup_sz = 0
for file in files_to_backup:
total_backup_sz += file["size"]
@ -454,12 +455,20 @@ def backup_do(base_backup_dir, files_to_backup, passphrase,\
# If no cipher is provided, the data is forwarded unencrypted !!!
encryptor = subprocess.Popen (["openssl", "enc",
"-e", "-aes-256-cbc",
"-pass", "pass:"+passphrase],
"-pass", "pass:"+passphrase] +
(["-z"] if compress else []),
stdin=pipe, stdout=subprocess.PIPE)
run_error = wait_backup_feedback(
progress_callback=compute_progress,
in_stream=encryptor.stdout, streamproc=encryptor,
**common_args)
elif compress:
compressor = subprocess.Popen (["gzip"],
stdin=pipe, stdout=subprocess.PIPE)
run_error = wait_backup_feedback(
progress_callback=compute_progress,
in_stream=compressor.stdout, streamproc=compressor,
**common_args)
else:
run_error = wait_backup_feedback(
progress_callback=compute_progress,
@ -638,12 +647,14 @@ def verify_hmac(filename, hmacfile, passphrase):
class Extract_Worker(Process):
def __init__(self, queue, base_dir, passphrase, encrypted, total_size,
print_callback, error_callback, progress_callback, vmproc=None):
print_callback, error_callback, progress_callback, vmproc=None,
compressed = False):
super(Extract_Worker, self).__init__()
self.queue = queue
self.base_dir = base_dir
self.passphrase = passphrase
self.encrypted = encrypted
self.compressed = compressed
self.total_size = total_size
self.blocks_backedup = 0
self.tar2_command = None
@ -719,6 +730,7 @@ class Extract_Worker(Process):
encryptor = subprocess.Popen (["openssl", "enc",
"-d", "-aes-256-cbc",
"-pass", "pass:"+self.passphrase],
(["-z"] if compressed else []),
stdin=open(filename,'rb'),
stdout=subprocess.PIPE)
@ -726,6 +738,15 @@ class Extract_Worker(Process):
progress_callback=self.compute_progress,
in_stream=encryptor.stdout, streamproc=encryptor,
**common_args)
elif self.compressed:
compressor = subprocess.Popen (["gzip", "-d"],
stdin=open(filename,'rb'),
stdout=subprocess.PIPE)
run_error = wait_backup_feedback(
progress_callback=self.compute_progress,
in_stream=compressor.stdout, streamproc=compressor,
**common_args)
else:
run_error = wait_backup_feedback(
progress_callback=self.compute_progress,
@ -754,7 +775,8 @@ class Extract_Worker(Process):
def restore_vm_dirs (backup_source, restore_tmpdir, passphrase, vms_dirs, vms,
vms_size, print_callback=None, error_callback=None,
progress_callback=None, encrypted=False, appvm=None):
progress_callback=None, encrypted=False, appvm=None,
compressed = False):
# Setup worker to extract encrypted data chunks to the restore dirs
if progress_callback == None:
@ -766,6 +788,7 @@ def restore_vm_dirs (backup_source, restore_tmpdir, passphrase, vms_dirs, vms,
base_dir=restore_tmpdir,
passphrase=passphrase,
encrypted=encrypted,
compressed=compressed,
total_size=vms_size,
print_callback=print_callback,
error_callback=error_callback,
@ -901,7 +924,7 @@ def backup_detect_format_version(backup_location):
def backup_restore_header(source, passphrase,
print_callback = print_stdout, error_callback = print_stderr,
encrypted=False, appvm=None, format_version = None):
encrypted=False, appvm=None, compressed = False, format_version = None):
vmproc = None
@ -935,6 +958,7 @@ def backup_restore_header(source, passphrase,
error_callback=error_callback,
progress_callback=None,
encrypted=encrypted,
compressed=compressed,
appvm=appvm)
return (restore_tmpdir, "qubes.xml")
@ -1212,7 +1236,7 @@ def backup_restore_print_summary(restore_info, print_callback = print_stdout):
def backup_restore_do(backup_location, restore_tmpdir, passphrase, restore_info,
host_collection = None, print_callback = print_stdout,
error_callback = print_stderr, progress_callback = None,
encrypted=False, appvm=None, format_version = None):
encrypted=False, appvm=None, compressed = False, format_version = None):
### Private functions begin
def restore_vm_dir_v1 (backup_dir, src_dir, dst_dir):
@ -1264,6 +1288,7 @@ def backup_restore_do(backup_location, restore_tmpdir, passphrase, restore_info,
error_callback=error_callback,
progress_callback=progress_callback,
encrypted=encrypted,
compressed=compressed,
appvm=appvm)
# Add VM in right order

3
qvm-tools/qvm-backup
View File

@ -44,6 +44,8 @@ def main():
help="The AppVM to send backups to")
parser.add_option ("-e", "--encrypt", action="store_true", dest="encrypt", default=False,
help="Encrypts the backup")
parser.add_option ("-z", "--compress", action="store_true", dest="compress", default=False,
help="Compress the backup")
(options, args) = parser.parse_args ()
@ -122,6 +124,7 @@ def main():
backup_do(base_backup_dir, files_to_backup, passphrase,
progress_callback=print_progress,
encrypt=options.encrypt,
compress=options.compress,
appvm=appvm)
except QubesException as e:
print >>sys.stderr, "ERROR: %s" % str(e)

8
qvm-tools/qvm-backup-restore
View File

@ -66,6 +66,9 @@ def main():
parser.add_option ("-e", "--encrypted", action="store_true", dest="decrypt", default=False,
help="The backup is encrypted")
parser.add_option ("-z", "--compressed", action="store_true", dest="compressed", default=False,
help="The backup is compressed")
(options, args) = parser.parse_args ()
if (len (args) != 1):
@ -105,7 +108,9 @@ def main():
passphrase = getpass.getpass("Please enter the pass phrase that will be used to decrypt/verify the backup: ")
print >> sys.stderr, "Checking backup content..."
restore_tmpdir,qubes_xml = backup_restore_header(backup_dir, passphrase, encrypted=options.decrypt, appvm=appvm)
restore_tmpdir,qubes_xml = backup_restore_header(backup_dir, passphrase,
encrypted=options.decrypt, compressed=options.compressed,
appvm=appvm)
restore_info = None
try:
@ -211,6 +216,7 @@ def main():
restore_info,
host_collection=host_collection,
encrypted=options.decrypt,
compressed=options.compressed,
appvm=appvm)
host_collection.unlock_db()