Reviewed-by: Rodrigo Trujillo <rodrigo.trujillo@linux.vnet.ibm.com> On 03/09/2016 04:16 PM, Jose Ricardo Ziviani wrote:

- I didn't find any place using this module so I'm removing the file to avoid any confusion.

Signed-off-by: Jose Ricardo Ziviani <joserz@linux.vnet.ibm.com> --- disks.py | 297 --------------------------------------------------------------- 1 file changed, 297 deletions(-) delete mode 100644 disks.py

diff --git a/disks.py b/disks.py deleted file mode 100644 index 52a793c..0000000 --- a/disks.py +++ /dev/null @@ -1,297 +0,0 @@ -# -# Project Kimchi -# -# Copyright IBM Corp, 2015-2016 -# -# This library is free software; you can redistribute it and/or -# modify it under the terms of the GNU Lesser General Public -# License as published by the Free Software Foundation; either -# version 2.1 of the License, or (at your option) any later version. -# -# This library is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY; without even the implied warranty of -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -# Lesser General Public License for more details. -# -# You should have received a copy of the GNU Lesser General Public -# License along with this library; if not, write to the Free Software -# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - -import os.path -import re -from parted import Device as PDevice -from parted import Disk as PDisk - -from wok.exception import OperationFailed -from wok.utils import run_command, wok_log - - -def _get_dev_node_path(maj_min): - """ Returns device node path given the device number 'major:min' """ - - dm_name = "/sys/dev/block/%s/dm/name" % maj_min - if os.path.exists(dm_name): - with open(dm_name) as dm_f: - content = dm_f.read().rstrip('\n') - return "/dev/mapper/" + content - - uevent = "/sys/dev/block/%s/uevent" % maj_min - with open(uevent) as ueventf: - content = ueventf.read() - - data = dict(re.findall(r'(\S+)=(".*?"|\S+)', content.replace("\n", " "))) - - return "/dev/%s" % data["DEVNAME"] - - -def _get_lsblk_devs(keys, devs=[]): - out, err, rc = run_command(["lsblk", "-Pbo"] + [','.join(keys)] + devs) - if rc != 0: - raise OperationFailed("KCHDISKS0001E", {'err': err}) - - return _parse_lsblk_output(out, keys) - - -def _get_dev_major_min(name): - maj_min = None - - keys = ["NAME", "MAJ:MIN"] - dev_list = _get_lsblk_devs(keys) - - for dev in dev_list: - if dev['name'].split()[0] == name: - maj_min = dev['maj:min'] - break - else: - raise OperationFailed("KCHDISKS0002E", {'device': name}) - - return maj_min - - -def _is_dev_leaf(devNodePath): - try: - # By default, lsblk prints a device information followed by children - # device information - childrenCount = len( - _get_lsblk_devs(["NAME"], [devNodePath])) - 1 - except OperationFailed as e: - # lsblk is known to fail on multipath devices - # Assume these devices contain children - wok_log.error( - "Error getting device info for %s: %s", devNodePath, e) - return False - - return childrenCount == 0 - - -def _is_dev_extended_partition(devType, devNodePath): - if devType != 'part': - return False - diskPath = devNodePath.rstrip('0123456789') - device = PDevice(diskPath) - try: - extended_part = PDisk(device).getExtendedPartition() - except NotImplementedError as e: - wok_log.warning( - "Error getting extended partition info for dev %s type %s: %s", - devNodePath, devType, e.message) - # Treate disk with unsupported partiton table as if it does not - # contain extended partitions. - return False - if extended_part and extended_part.path == devNodePath: - return True - return False - - -def _parse_lsblk_output(output, keys): - # output is on format key="value", - # where key can be NAME, TYPE, FSTYPE, SIZE, MOUNTPOINT, etc - lines = output.rstrip("\n").split("\n") - r = [] - for line in lines: - d = {} - for key in keys: - expression = r"%s=\".*?\"" % key - match = re.search(expression, line) - field = match.group() - k, v = field.split('=', 1) - d[k.lower()] = v[1:-1] - r.append(d) - return r - - -def _get_vgname(devNodePath): - """ Return volume group name of a physical volume. If the device node path - is not a physical volume, return empty string. """ - out, err, rc = run_command(["pvs", "--unbuffered", "--nameprefixes", - "--noheadings", "-o", "vg_name", devNodePath]) - if rc != 0: - return "" - - return re.findall(r"LVM2_VG_NAME='([^\']*)'", out)[0] - - -def _is_available(name, devtype, fstype, mountpoint, majmin): - devNodePath = _get_dev_node_path(majmin) - # Only list unmounted and unformated and leaf and (partition or disk) - # leaf means a partition, a disk has no partition, or a disk not held - # by any multipath device. Physical volume belongs to no volume group - # is also listed. Extended partitions should not be listed. - if (devtype in ['part', 'disk', 'mpath'] and - fstype in ['', 'LVM2_member'] and - mountpoint == "" and - _get_vgname(devNodePath) == "" and - _is_dev_leaf(devNodePath) and - not _is_dev_extended_partition(devtype, devNodePath)): - return True - return False - - -def get_partitions_names(check=False): - names = set() - keys = ["NAME", "TYPE", "FSTYPE", "MOUNTPOINT", "MAJ:MIN"] - # output is on format key="value", - # where key can be NAME, TYPE, FSTYPE, MOUNTPOINT - for dev in _get_lsblk_devs(keys): - # split()[0] to avoid the second part of the name, after the - # whiteline - name = dev['name'].split()[0] - if check and not _is_available(name, dev['type'], dev['fstype'], - dev['mountpoint'], dev['maj:min']): - continue - names.add(name) - - return list(names) - - -def get_partition_details(name): - majmin = _get_dev_major_min(name) - dev_path = _get_dev_node_path(majmin) - - keys = ["TYPE", "FSTYPE", "SIZE", "MOUNTPOINT"] - try: - dev = _get_lsblk_devs(keys, [dev_path])[0] - except OperationFailed as e: - wok_log.error( - "Error getting partition info for %s: %s", name, e) - return {} - - dev['available'] = _is_available(name, dev['type'], dev['fstype'], - dev['mountpoint'], majmin) - if dev['mountpoint']: - # Sometimes the mountpoint comes with [SWAP] or other - # info which is not an actual mount point. Filtering it - regexp = re.compile(r"\[.*\]") - if regexp.search(dev['mountpoint']) is not None: - dev['mountpoint'] = '' - dev['path'] = dev_path - dev['name'] = name - return dev - - -def vgs(): - """ - lists all volume groups in the system. All size units are in bytes. - - [{'vgname': 'vgtest', 'size': 999653638144L, 'free': 0}] - """ - cmd = ['vgs', - '--units', - 'b', - '--nosuffix', - '--noheading', - '--unbuffered', - '--options', - 'vg_name,vg_size,vg_free'] - - out, err, rc = run_command(cmd) - if rc != 0: - raise OperationFailed("KCHLVM0001E", {'err': err}) - - if not out: - return [] - - # remove blank spaces and create a list of VGs - vgs = map(lambda v: v.strip(), out.strip('\n').split('\n')) - - # create a dict based on data retrieved from vgs - return map(lambda l: {'vgname': l[0], - 'size': long(l[1]), - 'free': long(l[2])}, - [fields.split() for fields in vgs]) - - -def lvs(vgname=None): - """ - lists all logical volumes found in the system. It can be filtered by - the volume group. All size units are in bytes. - - [{'lvname': 'lva', 'path': '/dev/vgtest/lva', 'size': 12345L}, - {'lvname': 'lvb', 'path': '/dev/vgtest/lvb', 'size': 12345L}] - """ - cmd = ['lvs', - '--units', - 'b', - '--nosuffix', - '--noheading', - '--unbuffered', - '--options', - 'lv_name,lv_path,lv_size,vg_name'] - - out, err, rc = run_command(cmd) - if rc != 0: - raise OperationFailed("KCHLVM0001E", {'err': err}) - - if not out: - return [] - - # remove blank spaces and create a list of LVs filtered by vgname, if - # provided - lvs = filter(lambda f: vgname is None or vgname in f, - map(lambda v: v.strip(), out.strip('\n').split('\n'))) - - # create a dict based on data retrieved from lvs - return map(lambda l: {'lvname': l[0], - 'path': l[1], - 'size': long(l[2])}, - [fields.split() for fields in lvs]) - - -def pvs(vgname=None): - """ - lists all physical volumes in the system. It can be filtered by the - volume group. All size units are in bytes. - - [{'pvname': '/dev/sda3', - 'size': 469502001152L, - 'uuid': 'kkon5B-vnFI-eKHn-I5cG-Hj0C-uGx0-xqZrXI'}, - {'pvname': '/dev/sda2', - 'size': 21470642176L, - 'uuid': 'CyBzhK-cQFl-gWqr-fyWC-A50Y-LMxu-iHiJq4'}] - """ - cmd = ['pvs', - '--units', - 'b', - '--nosuffix', - '--noheading', - '--unbuffered', - '--options', - 'pv_name,pv_size,pv_uuid,vg_name'] - - out, err, rc = run_command(cmd) - if rc != 0: - raise OperationFailed("KCHLVM0001E", {'err': err}) - - if not out: - return [] - - # remove blank spaces and create a list of PVs filtered by vgname, if - # provided - pvs = filter(lambda f: vgname is None or vgname in f, - map(lambda v: v.strip(), out.strip('\n').split('\n'))) - - # create a dict based on data retrieved from pvs - return map(lambda l: {'pvname': l[0], - 'size': long(l[1]), - 'uuid': l[2]}, - [fields.split() for fields in pvs])