diff options
Diffstat (limited to 'src/pybind/mgr/volumes/fs/operations/group.py')
| -rw-r--r-- | src/pybind/mgr/volumes/fs/operations/group.py | 301 |
1 files changed, 301 insertions, 0 deletions
diff --git a/src/pybind/mgr/volumes/fs/operations/group.py b/src/pybind/mgr/volumes/fs/operations/group.py new file mode 100644 index 000000000..c91969278 --- /dev/null +++ b/src/pybind/mgr/volumes/fs/operations/group.py @@ -0,0 +1,301 @@ +import os +import errno +import logging +from contextlib import contextmanager + +import cephfs + +from .snapshot_util import mksnap, rmsnap +from .pin_util import pin +from .template import GroupTemplate +from ..fs_util import listdir, listsnaps, get_ancestor_xattr, create_base_dir, has_subdir +from ..exception import VolumeException + +log = logging.getLogger(__name__) + +class Group(GroupTemplate): + # Reserved subvolume group name which we use in paths for subvolumes + # that are not assigned to a group (i.e. created with group=None) + NO_GROUP_NAME = "_nogroup" + + def __init__(self, fs, vol_spec, groupname): + if groupname == Group.NO_GROUP_NAME: + raise VolumeException(-errno.EPERM, "Operation not permitted for group '{0}' as it is an internal group.".format(groupname)) + if groupname in vol_spec.INTERNAL_DIRS: + raise VolumeException(-errno.EINVAL, "'{0}' is an internal directory and not a valid group name.".format(groupname)) + self.fs = fs + self.user_id = None + self.group_id = None + self.vol_spec = vol_spec + self.groupname = groupname if groupname else Group.NO_GROUP_NAME + + @property + def path(self): + return os.path.join(self.vol_spec.base_dir.encode('utf-8'), self.groupname.encode('utf-8')) + + @property + def group_name(self): + return self.groupname + + @property + def uid(self): + return self.user_id + + @uid.setter + def uid(self, val): + self.user_id = val + + @property + def gid(self): + return self.group_id + + @gid.setter + def gid(self, val): + self.group_id = val + + def is_default_group(self): + return self.groupname == Group.NO_GROUP_NAME + + def list_subvolumes(self): + try: + return listdir(self.fs, self.path) + except VolumeException as ve: + # listing a default group when it's not yet created + if ve.errno == -errno.ENOENT and self.is_default_group(): + return [] + raise + + def has_subvolumes(self): + try: + return has_subdir(self.fs, self.path) + except VolumeException as ve: + # listing a default group when it's not yet created + if ve.errno == -errno.ENOENT and self.is_default_group(): + return False + raise + + def pin(self, pin_type, pin_setting): + return pin(self.fs, self.path, pin_type, pin_setting) + + def create_snapshot(self, snapname): + snappath = os.path.join(self.path, + self.vol_spec.snapshot_dir_prefix.encode('utf-8'), + snapname.encode('utf-8')) + mksnap(self.fs, snappath) + + def remove_snapshot(self, snapname): + snappath = os.path.join(self.path, + self.vol_spec.snapshot_dir_prefix.encode('utf-8'), + snapname.encode('utf-8')) + rmsnap(self.fs, snappath) + + def list_snapshots(self): + try: + dirpath = os.path.join(self.path, + self.vol_spec.snapshot_dir_prefix.encode('utf-8')) + return listsnaps(self.fs, self.vol_spec, dirpath, filter_inherited_snaps=True) + except VolumeException as ve: + if ve.errno == -errno.ENOENT: + return [] + raise + + def info(self): + st = self.fs.statx(self.path, cephfs.CEPH_STATX_BTIME | cephfs.CEPH_STATX_SIZE + | cephfs.CEPH_STATX_UID | cephfs.CEPH_STATX_GID | cephfs.CEPH_STATX_MODE + | cephfs.CEPH_STATX_ATIME | cephfs.CEPH_STATX_MTIME | cephfs.CEPH_STATX_CTIME, + cephfs.AT_SYMLINK_NOFOLLOW) + usedbytes = st["size"] + try: + nsize = int(self.fs.getxattr(self.path, 'ceph.quota.max_bytes').decode('utf-8')) + except cephfs.NoData: + nsize = 0 + + try: + data_pool = self.fs.getxattr(self.path, 'ceph.dir.layout.pool').decode('utf-8') + except cephfs.Error as e: + raise VolumeException(-e.args[0], e.args[1]) + + return {'uid': int(st["uid"]), + 'gid': int(st["gid"]), + 'atime': str(st["atime"]), + 'mtime': str(st["mtime"]), + 'ctime': str(st["ctime"]), + 'mode': int(st["mode"]), + 'data_pool': data_pool, + 'created_at': str(st["btime"]), + 'bytes_quota': "infinite" if nsize == 0 else nsize, + 'bytes_used': int(usedbytes), + 'bytes_pcent': "undefined" if nsize == 0 else '{0:.2f}'.format((float(usedbytes) / nsize) * 100.0)} + + def resize(self, newsize, noshrink): + try: + newsize = int(newsize) + if newsize <= 0: + raise VolumeException(-errno.EINVAL, "Invalid subvolume group size") + except ValueError: + newsize = newsize.lower() + if not (newsize == "inf" or newsize == "infinite"): + raise (VolumeException(-errno.EINVAL, "invalid size option '{0}'".format(newsize))) + newsize = 0 + noshrink = False + + try: + maxbytes = int(self.fs.getxattr(self.path, 'ceph.quota.max_bytes').decode('utf-8')) + except cephfs.NoData: + maxbytes = 0 + except cephfs.Error as e: + raise VolumeException(-e.args[0], e.args[1]) + + group_stat = self.fs.stat(self.path) + if newsize > 0 and newsize < group_stat.st_size: + if noshrink: + raise VolumeException(-errno.EINVAL, "Can't resize the subvolume group. The new size" + " '{0}' would be lesser than the current used size '{1}'" + .format(newsize, group_stat.st_size)) + + if not newsize == maxbytes: + try: + self.fs.setxattr(self.path, 'ceph.quota.max_bytes', str(newsize).encode('utf-8'), 0) + except cephfs.Error as e: + raise (VolumeException(-e.args[0], + "Cannot set new size for the subvolume group. '{0}'".format(e.args[1]))) + return newsize, group_stat.st_size + +def set_group_attrs(fs, path, attrs): + # set subvolume group attrs + # set size + quota = attrs.get("quota") + if quota is not None: + try: + fs.setxattr(path, 'ceph.quota.max_bytes', str(quota).encode('utf-8'), 0) + except cephfs.InvalidValue: + raise VolumeException(-errno.EINVAL, "invalid size specified: '{0}'".format(quota)) + except cephfs.Error as e: + raise VolumeException(-e.args[0], e.args[1]) + + # set pool layout + pool = attrs.get("data_pool") + if not pool: + pool = get_ancestor_xattr(fs, path, "ceph.dir.layout.pool") + try: + fs.setxattr(path, 'ceph.dir.layout.pool', pool.encode('utf-8'), 0) + except cephfs.InvalidValue: + raise VolumeException(-errno.EINVAL, + "Invalid pool layout '{0}'. It must be a valid data pool".format(pool)) + + # set uid/gid + uid = attrs.get("uid") + if uid is None: + uid = 0 + else: + try: + uid = int(uid) + if uid < 0: + raise ValueError + except ValueError: + raise VolumeException(-errno.EINVAL, "invalid UID") + + gid = attrs.get("gid") + if gid is None: + gid = 0 + else: + try: + gid = int(gid) + if gid < 0: + raise ValueError + except ValueError: + raise VolumeException(-errno.EINVAL, "invalid GID") + fs.chown(path, uid, gid) + + # set mode + mode = attrs.get("mode", None) + if mode is not None: + fs.lchmod(path, mode) + +def create_group(fs, vol_spec, groupname, size, pool, mode, uid, gid): + """ + create a subvolume group. + + :param fs: ceph filesystem handle + :param vol_spec: volume specification + :param groupname: subvolume group name + :param size: In bytes, or None for no size limit + :param pool: the RADOS pool where the data objects of the subvolumes will be stored + :param mode: the user permissions + :param uid: the user identifier + :param gid: the group identifier + :return: None + """ + group = Group(fs, vol_spec, groupname) + path = group.path + vol_spec_base_dir = group.vol_spec.base_dir.encode('utf-8') + + # create vol_spec base directory with default mode(0o755) if it doesn't exist + create_base_dir(fs, vol_spec_base_dir, vol_spec.DEFAULT_MODE) + fs.mkdir(path, mode) + try: + attrs = { + 'uid': uid, + 'gid': gid, + 'data_pool': pool, + 'quota': size + } + set_group_attrs(fs, path, attrs) + except (cephfs.Error, VolumeException) as e: + try: + # cleanup group path on best effort basis + log.debug("cleaning up subvolume group path: {0}".format(path)) + fs.rmdir(path) + except cephfs.Error as ce: + log.debug("failed to clean up subvolume group {0} with path: {1} ({2})".format(groupname, path, ce)) + if isinstance(e, cephfs.Error): + e = VolumeException(-e.args[0], e.args[1]) + raise e + +def remove_group(fs, vol_spec, groupname): + """ + remove a subvolume group. + + :param fs: ceph filesystem handle + :param vol_spec: volume specification + :param groupname: subvolume group name + :return: None + """ + group = Group(fs, vol_spec, groupname) + try: + fs.rmdir(group.path) + except cephfs.Error as e: + if e.args[0] == errno.ENOENT: + raise VolumeException(-errno.ENOENT, "subvolume group '{0}' does not exist".format(groupname)) + raise VolumeException(-e.args[0], e.args[1]) + +@contextmanager +def open_group(fs, vol_spec, groupname): + """ + open a subvolume group. This API is to be used as a context manager. + + :param fs: ceph filesystem handle + :param vol_spec: volume specification + :param groupname: subvolume group name + :return: yields a group object (subclass of GroupTemplate) + """ + group = Group(fs, vol_spec, groupname) + try: + st = fs.stat(group.path) + group.uid = int(st.st_uid) + group.gid = int(st.st_gid) + except cephfs.Error as e: + if e.args[0] == errno.ENOENT: + if not group.is_default_group(): + raise VolumeException(-errno.ENOENT, "subvolume group '{0}' does not exist".format(groupname)) + else: + raise VolumeException(-e.args[0], e.args[1]) + yield group + +@contextmanager +def open_group_unique(fs, vol_spec, groupname, c_group, c_groupname): + if groupname == c_groupname: + yield c_group + else: + with open_group(fs, vol_spec, groupname) as group: + yield group |