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#!/usr/sbin/acropsh
import re
import os
import stat
import subprocess
import sys
from optparse import OptionParser
import time
import signal
from collections import defaultdict
import zlib
import abc
# path-name: //var/lib/Acronis/mount/{crc32(arch)-timestamp}_{cont_id}_{pit}_{index}
VERBOSE = True
ACRONIS_DIR = "/var/lib/Acronis"
MOUNT_DIR_DEFAULT = "/var/lib/Acronis/mount"
IOSTAMP_DIR = "/var/lib/Acronis/IOStamp"
DEV_DIR = "/dev"
TI_MNT_NONE = "none"
CONTAINER_ID_NONE = "0"
FS_NONE = "none"
FS_XFS = "xfs"
FS_EXT3 = "ext3"
FS_EXT4 = "ext4"
FS_FAT = "vfat"
FS_NTFS = "ntfs"
MOUNT_OPT_NOATIME = "noatime"
MOUNT_OPT_NOUUID = "nouuid"
MOUNT_OPT_NOINIT_ITABLE = "noinit_itable"
MOUNT_DIR = os.getenv("ACRONIS_MOUNT_DIR", MOUNT_DIR_DEFAULT)
DOES_JOURNALING = os.getenv("ACRONIS_MOUNT_JOURNALING", False)
def log(arg):
global VERBOSE
if VERBOSE:
print(arg)
def outprint(arg):
print(arg)
class MntDevMgr(object):
""" Mount Device Manager """
__metaclass__ = abc.ABCMeta
def __init__(self, options):
self.archive = options.archive
self.pit = options.pit
self.index = options.index
self.device = options.device
self.fstype = options.fstype
@staticmethod
def extract_name(device):
""" Extract device name from '/dev/xxx' -> 'xxx' """
if not device:
return device
return device.split("/")[-1]
@staticmethod
def execute(cmd):
log("Executing: " + cmd)
p = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
stdout, stderr = p.communicate()
p.wait()
out = stdout.splitlines()
err = stderr.splitlines()
log("ret={0}".format(p.returncode))
log("out={0}".format(out))
log("err={0}".format(err))
return p.returncode, out, err
@staticmethod
def build_mount_folder(arch, cid, pit, index):
return "{0}/{1}-{2}_{3}_{4}_{5}".format(MOUNT_DIR, format(zlib.crc32(arch.encode()) % (1 << 32), 'x'), int(time.time() * 1000), cid, pit, index)
@staticmethod
def print_device(device):
outprint("DEVICE:{0}".format(device))
@staticmethod
def print_mount_dir(mount_dir):
outprint("MNTDIR:{0}".format(mount_dir))
@staticmethod
def dev_timestamp(device, timestamp_type):
try:
if timestamp_type == "ctime":
return int(os.stat(device).st_ctime)
with open("{0}/{1}".format(IOSTAMP_DIR, MntDevMgr.extract_name(device))) as f:
s_stamp = f.read().replace('\n', '')
return int(s_stamp)
except Exception as ex:
print("Error {0}".format(ex))
return None
@staticmethod
def get_idle(stamp):
if stamp is None:
raise ValueError("Timestamp is 'None'")
t = int(time.time())
return max(0, t - stamp)
@staticmethod
def dev_idle_time(device, timestamp_type):
stamp = MntDevMgr.dev_timestamp(device, timestamp_type)
return MntDevMgr.get_idle(stamp)
@staticmethod
def get_max_timestamp(devices, timestamp_type):
return max([0] + [MntDevMgr.dev_timestamp(dev["dev"], timestamp_type) for dev in devices])
@staticmethod
def dev2obj(elem):
mount_point = elem[1]
components = MntDevMgr.extract_name(mount_point).split("_")
cid = CONTAINER_ID_NONE
pit = "0"
if len(components) > 1 and len(components[1]) > 0:
cid = components[1]
if len(components) > 2 and len(components[2]) > 0:
pit = components[2]
arch = ""
fstype = ""
majmin = ""
pid = ""
index = ""
if len(elem) >= 6:
arch = elem[2]
fstype = elem[3]
majmin = elem[4]
pid = elem[5]
index = elem[6]
return {
'dev': elem[0],
'mpoint': elem[1],
'arch': arch,
'fstype': fstype,
'majmin': majmin,
'pid': pid,
'index': index,
'cid': cid,
'pit': pit
}
@staticmethod
def get_devices(key):
devices = []
ret, out, _ = MntDevMgr.execute("trueimagemnt {0}".format(key))
if ret != 0:
raise SystemError("Error code: {0}".format(ret))
for elem in out:
components = elem.decode().split(" ")
devices.append(MntDevMgr.dev2obj(components))
return devices
@staticmethod
def get_used_devices():
return MntDevMgr.get_devices("--list")
@staticmethod
def get_orphaned_devices():
return MntDevMgr.get_devices("--list-orphanes")
@staticmethod
def stop_service(pid):
MntDevMgr.execute("trueimagemnt --stop {0}".format(pid))
@staticmethod
def daemon_status(pid):
try:
with open("/proc/{0}/cmdline".format(pid)) as f:
cmdline = f.read()
if "TrueImageMountDemonBin" in cmdline:
return True
except Exception as ex:
print("Error {0}".format(ex))
return False
@staticmethod
def get_devices_groupped_by_pid():
devices = MntDevMgr.get_used_devices()
pids = defaultdict(list)
for dev in devices:
pids[dev['pid']].append(dev)
return dict(pids)
@staticmethod
def status_str(b):
return "On" if b else "Off"
@abc.abstractmethod
def get_mount_folder(self):
pass
@abc.abstractmethod
def mount_prepare(self, folder):
pass
@abc.abstractmethod
def umount_done(self, folder):
pass
@abc.abstractmethod
def create_folder(self, folder):
pass
@abc.abstractmethod
def mount_to_folder(self, folder):
pass
@abc.abstractmethod
def remove_folder(self, folder):
pass
@abc.abstractmethod
def umount_from_folder(self, folder):
pass
@abc.abstractmethod
def check_folder_is_mount(self, folder):
pass
@abc.abstractmethod
def check_folder_is_busy(self, folder):
pass
def equal_dev(self, dev):
return self.pit == dev['pit']
def get_mount_options(self):
opts = [MOUNT_OPT_NOATIME]
if self.fstype == FS_XFS:
opts.append(MOUNT_OPT_NOUUID)
if self.fstype == FS_EXT4:
opts.append(MOUNT_OPT_NOINIT_ITABLE)
return opts
def get_mount_options_with_key(self):
opts = self.get_mount_options()
return "-o " + ",".join(opts) if opts else ""
def journal_if_needed(self):
if self.fstype not in [FS_EXT3, FS_EXT4]:
return
# check if journaling was enabled
_, out, _ = self.execute("tune2fs -l {0}".format(self.device))
if "has_journal" not in out:
return
# does the journaling
self.execute("e2fsck -p -E journal_only {0}".format(self.device))
# switch journaling off
self.execute("tune2fs -O ^has_journal {0}".format(self.device))
def mount(self):
self.print_device(self.device)
log("mounting device {0}".format(self.device))
if self.fstype in [FS_NONE, FS_FAT, FS_NTFS]:
log("skipped mounting a device with '{0}' file system".format(self.fstype))
return
if DOES_JOURNALING:
self.journal_if_needed()
folder = self.get_mount_folder()
self.mount_prepare(folder)
if self.mount_to_folder(folder):
self.print_mount_dir(folder)
elif self.fstype == FS_XFS:
# workaround for ABR-388306.
ret, _, _ = self.execute("xfs_repair {0}".format(self.device))
if ret == 2:
self.execute("xfs_repair -L {0}".format(self.device))
self.execute("xfs_repair {0}".format(self.device))
if self.mount_to_folder(folder):
self.print_mount_dir(folder)
else:
self.remove_folder(folder)
else:
self.remove_folder(folder)
def umount_device(self, dev):
if self.umount_from_folder(dev['mpoint']):
self.umount_done(dev['mpoint'])
return True
return False
def umount_device_with_check(self, dev):
if self.check_device_is_mount(dev):
return self.umount_device(dev)
return True
def check_devices_is_umount(self, devices, silent=True):
for dev in devices:
if self.check_device_is_mount(dev, silent):
return False
return True
def check_device_is_mount(self, dev, silent=True):
folder = dev['mpoint']
if self.check_folder_is_mount(folder):
if not silent:
self.print_mount_dir(folder)
return True
return False
def check_device_is_busy(self, dev):
if not self.check_device_is_mount(dev):
return False
return self.check_folder_is_busy(dev['mpoint'])
def status(self):
devices = MntDevMgr.get_used_devices()
for dev in devices:
if self.pit is None or self.equal_dev(dev):
self.print_device(dev['dev'])
self.check_device_is_mount(dev, False)
class HostMntDevMgr(MntDevMgr):
def __init__(self, options):
super(HostMntDevMgr, self).__init__(options)
def get_mount_folder(self):
return self.build_mount_folder(self.archive, CONTAINER_ID_NONE, self.pit, self.index)
def mount_prepare(self, folder):
if os.environ.get('ACRONIS_ENABLE_FSCK_BEFORE_MOUNT', 0) == '1':
self.execute("fsck -y {0}".format(self.device))
self.create_folder(folder)
if MOUNT_DIR == MOUNT_DIR_DEFAULT:
log("Reset 751 for {0}".format(ACRONIS_DIR))
self.execute("chmod 751 {0}".format(ACRONIS_DIR))
else:
log("Reset 751 for {0}".format(MOUNT_DIR))
self.execute("chmod 751 {0}".format(MOUNT_DIR))
def umount_done(self, folder):
self.remove_folder(folder)
def create_folder(self, folder):
self.execute("mkdir -p {0}".format(folder))
def mount_to_folder(self, folder):
ret, _, _ = self.execute("mount {0} {1} {2}".format(self.get_mount_options_with_key(), self.device, folder))
return ret == 0
def remove_folder(self, folder):
self.execute("rm -rf {0}".format(folder))
def umount_from_folder(self, folder):
self.execute("umount {0}".format(folder))
return not self.check_folder_is_mount(folder)
def check_folder_is_mount(self, folder):
ret, _, _ = self.execute("mountpoint {0}".format(folder))
return ret == 0
def check_folder_is_busy(self, folder):
ret, _, _ = self.execute("fuser -vm {0}".format(folder))
return ret == 0
class VzCtMntDevMgr(MntDevMgr):
def __init__(self, options, cont_id):
super(VzCtMntDevMgr, self).__init__(options)
self.cont_id = cont_id if cont_id != CONTAINER_ID_NONE else options.cont_id
def get_mount_folder(self):
return self.build_mount_folder(self.archive, self.cont_id, self.pit, self.index)
def mount_prepare(self, folder):
self.create_folder(folder)
log("Reset 751 for {0}".format(MOUNT_DIR))
self.execute("vzctl exec {0} chmod 751 {1}".format(self.cont_id, MOUNT_DIR))
def umount_done(self, folder):
self.remove_folder(folder)
def create_folder(self, folder):
self.execute("mkdir -p {0}".format(folder))
self.execute("vzctl exec {0} mkdir -p {1}".format(self.cont_id, folder))
def mount_to_folder(self, folder):
if not self._check_folder_is_mount_host(folder):
self.execute("mount {0} {1} {2}".format(self.get_mount_options_with_key(), self.device, folder))
# Virtuozzo 7.5
ret, _, _ = self.execute("vzctl set {0} --save --bindmount_add {1}:{2}".format(self.cont_id, folder, folder))
if ret != 0:
# Fallback for VZ < 7.5
ret_bind, _, _ = self.execute("mount -o bind {0} /vz/root/{1}/{2}".format(folder, self.cont_id, folder))
return ret_bind == 0
return True
def remove_folder(self, folder):
self.execute("rm -rf {0}".format(folder))
self.execute("vzctl exec {0} rm -rf {1}".format(self.cont_id, folder))
def umount_from_folder(self, folder):
# Virtuozzo 7.5
ret, _, _ = self.execute("vzctl set {0} --save --bindmount_del {1}".format(self.cont_id, folder))
check_mount_cont = False
if ret != 0:
# Fallback for VZ < 7.5
self.execute("umount /vz/root/{0}/{1}".format(self.cont_id, folder))
check_mount_cont = self.check_folder_is_mount(folder)
check_mount_host = self._check_folder_is_mount_host(folder)
if check_mount_host:
self.execute("umount {0}".format(folder))
check_mount_host = self._check_folder_is_mount_host(folder)
return not check_mount_cont and not check_mount_host
def _check_folder_is_mount_host(self, folder):
ret, _, _ = self.execute("mountpoint {0}".format(folder))
return ret == 0
def check_folder_is_mount(self, folder):
ret, _, _ = self.execute("vzctl exec {0} mountpoint {1}".format(self.cont_id, folder))
return ret == 0
def check_folder_is_busy(self, folder):
ret, _, _ = self.execute("vzctl exec {0} fuser -vm {1}".format(self.cont_id, folder))
return ret == 0
def equal_dev(self, dev):
return self.cont_id == dev['cid'] and self.pit == dev['pit']
def create_mount_manager(cont_id, options):
if cont_id == CONTAINER_ID_NONE:
mount_manager = HostMntDevMgr(options)
else:
mount_manager = VzCtMntDevMgr(options, cont_id)
return mount_manager
def umount_devices(options, devices):
for dev in devices:
if dev['mpoint'] == TI_MNT_NONE:
continue
mount_manager = create_mount_manager(dev["cid"], options)
if not mount_manager.umount_device_with_check(dev):
log("Can't umount folder {0} in container {1}: filesystem is busy".format(dev['mpoint'], dev['cid']))
return False
return True
def purge_devices_by_attr(options, value, attr):
pids = MntDevMgr.get_devices_groupped_by_pid()
for pid, devices in pids.items():
mount_manager = None
for dev in devices:
if dev[attr] == value:
mount_manager = create_mount_manager(dev["cid"], options)
if dev['mpoint'] == TI_MNT_NONE:
continue
log("purge dev={0}".format(dev['dev']))
mount_manager.umount_device_with_check(dev)
if mount_manager and mount_manager.check_devices_is_umount(devices):
mount_manager.stop_service(pid)
def purge_devices_by_name(options):
purge_devices_by_attr(options, options.device, "dev")
def purge_devices_by_names_list(options):
pids = MntDevMgr.get_devices_groupped_by_pid()
purge_devices = options.purge_devices.split(",")
for pid, devices in pids.items():
mount_manager = None
for dev in devices:
if dev["dev"] in purge_devices:
mount_manager = create_mount_manager(dev["cid"], options)
if dev['mpoint'] == TI_MNT_NONE:
continue
log("purge dev={0}".format(dev['dev']))
mount_manager.umount_device_with_check(dev)
if mount_manager and mount_manager.check_devices_is_umount(devices):
mount_manager.stop_service(pid)
def purge_devices_by_pit(options):
purge_devices_by_attr(options, options.pit, "pit")
def need_umount_devices(options, devices):
if options.exclusions:
exclusions = options.exclusions.split(",")
for dev in devices:
if dev["pit"] in exclusions:
log("skipping umount for dev={0} device is in exclusions list".format(dev))
return False
if options.exclude_device:
exclude_devices = options.exclude_device.split(",")
for dev in devices:
if dev["dev"] in exclude_devices:
log("skipping umount for dev={0} device is in exclusions list".format(dev))
return False
if options.timeout == 0:
return True
max_timestamps = MntDevMgr.get_max_timestamp(devices, options.timestamp_type)
idle = MntDevMgr.get_idle(max_timestamps)
return idle >= options.timeout
def purge_all_devices(options):
cleanup_orphaned_devices(options)
pids = MntDevMgr.get_devices_groupped_by_pid()
for pid, devices in pids.items():
if need_umount_devices(options, devices):
if umount_devices(options, devices):
MntDevMgr.stop_service(pid)
def info_all_devices(options):
devices = MntDevMgr.get_used_devices()
for dev in devices:
mount_manager = create_mount_manager(dev["cid"], options)
device = dev['dev']
pid = dev['pid']
outprint("Daemon: {0}".format(pid))
s = mount_manager.daemon_status(pid)
outprint("Status: {0}".format(mount_manager.status_str(s)))
if s:
outprint("Device: {0}".format(device))
outprint("Idle: {0}".format(mount_manager.dev_idle_time(device, options.timestamp_type)))
outprint("Busy: {0}".format(mount_manager.check_device_is_busy(dev)))
def cleanup_orphaned_devices(options):
devices = MntDevMgr.get_orphaned_devices()
for dev in devices:
mount_manager = create_mount_manager(dev["cid"], options)
mount_manager.umount_device(dev)
def main():
global VERBOSE
parser = OptionParser()
parser.add_option("-I", "--info", action="store_true", dest="info", help="print info", default=False)
parser.add_option("-u", "--purge", action="store_true", dest="purge", help="purge devices", default=False)
parser.add_option("-z", "--purge-devices", action="store", dest="purge_devices", help="purge passed devices", default=None)
parser.add_option("-s", "--status", action="store_true", dest="status", help="status of mount", default=False)
parser.add_option("-i", "--cont_id", action="store", dest="cont_id", help="container id", default=CONTAINER_ID_NONE, type="string", metavar="CONT_ID")
parser.add_option("-p", "--pit", action="store", dest="pit", help="point in time", default=None, type="string", metavar="PIT")
parser.add_option("-d", "--device", action="store", dest="device", help="device", default=None, type="string", metavar="DEVICE")
parser.add_option("-t", "--timeout", action="store", dest="timeout", help="timeout", default=0, type="int", metavar="TIMEOUT")
parser.add_option("-T", "--timestamp-type", action="store", dest="timestamp_type", help="timestamp type", default="io", type="string", metavar="TIMESTAMP_TYPE")
parser.add_option("-e", "--exclusions", action="store", dest="exclusions", help="exclusions", default=None)
parser.add_option("-l", "--exclude_device", action="store", dest="exclude_device", help="devices to exclude", default=None)
parser.add_option("-v", "--verbose", action="store_true", dest="verbose", help="verbose output", default=True)
parser.add_option("-f", "--fstype", action="store", dest="fstype", help="type of file system", default=None)
parser.add_option("-a", "--archive", action="store", dest="archive", help="archive", default=None, type="string")
parser.add_option("-x", "--index", action="store", dest="index", help="index of volume", default=None, type="string")
parser.add_option("-c", "--cleanup", action="store_true", dest="cleanup", help="cleanup devices", default=False)
options, args = parser.parse_args()
VERBOSE = options.verbose
if options.info:
VERBOSE = False
log("status: {0}".format(options.status))
log("purge: {0}".format(options.purge))
log("cont_id: {0}".format(options.cont_id))
log("pit: {0}".format(options.pit))
log("device: {0}".format(options.device))
log("timeout: {0}".format(options.timeout))
log("timestamp type: {0}".format(options.timestamp_type))
log("exclusions: {0}".format(options.exclusions))
log("exclude_device: {0}".format(options.exclude_device))
log("fstype: {0}".format(options.fstype))
log("cleanup: {0}".format(options.cleanup))
log("purge-devices: {0}".format(options.purge_devices))
try:
if options.purge:
if options.pit:
purge_devices_by_pit(options)
return
if options.device:
purge_devices_by_name(options)
return
if options.purge_devices:
purge_devices_by_names_list(options)
return
purge_all_devices(options)
return
if options.cleanup:
cleanup_orphaned_devices(options)
return
if options.info:
info_all_devices(options)
return
mount_manager = create_mount_manager(options.cont_id, options)
if options.status:
mount_manager.status()
return
mount_manager.mount()
except Exception as ex:
sys.exit(ex)
if __name__ == "__main__":
# execute only if run as a script
main()