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Editing: _client.py
# SPDX-License-Identifier: LGPL-2.1-or-later # # Copyright (C) 2011-2023 Red Hat, Inc. # # Author: Tony Asleson <tasleson@redhat.com> import os import sys import socket from stat import S_ISSOCK from lsm import (Volume, NfsExport, Capabilities, Pool, System, Battery, Disk, AccessGroup, FileSystem, FsSnapshot, uri_parse, LsmError, ErrorNumber, INetworkAttachedStorage, TargetPort) from lsm._common import return_requires as _return_requires from lsm._common import UDS_PATH as _UDS_PATH from lsm._transport import TransPort as _TransPort from lsm._data import IData as _IData import six # Removes self for the hash d # @param d Hash to remove self from # @returns d with hash removed. def _del_self(d): """ Used to remove the self key from the dict d. Self is included when calling the function locals() in a class method. """ del d['self'] return d def _check_search_key(search_key, supported_keys): if search_key and search_key not in supported_keys: raise LsmError(ErrorNumber.UNSUPPORTED_SEARCH_KEY, "Unsupported search_key: '%s'" % search_key) return # Descriptive exception about daemon not running. def _raise_no_daemon(): raise LsmError( ErrorNumber.DAEMON_NOT_RUNNING, "The libStorageMgmt daemon is not running (process " "name lsmd), please start service") # Main client class for library. # ** IMPORTANT ** # Theory of operation for methods in this class. # We are using the name of the method and the name of the parameters and # using python introspection abilities to translate them to the method and # parameter names. Makes the code compact, but you will break things if the # IPlugin class does not match the method names and parameters here! class Client(INetworkAttachedStorage): # # Used for default flag value # FLAG_RSVD = 0 FLAG_VOLUME_CREATE_USE_SYSTEM_CACHE = 1 << 0 FLAG_VOLUME_CREATE_USE_IO_PASSTHROUGH = 1 << 1 FLAG_VOLUME_CREATE_DISABLE_SYSTEM_CACHE = 1 << 2 FLAG_VOLUME_CREATE_DISABLE_IO_PASSTHROUGH = 1 << 3 """ Client side class used for managing storage that utilises RPC mechanism. """ # Method added so that the interface for the client RPC and the plug-in # itself match. def plugin_register(self, uri, plain_text_password, timeout_ms, flags=0): raise RuntimeError("Do not call directly!") # Called when we are ready to initialize the plug-in. # @param self The this pointer # @param uri The uniform resource identifier # @param plain_text_password Password as plain text # @param timeout_ms The timeout in ms # @param flags Reserved for future use, must be zero. # @returns None def __start(self, uri, password, timeout, flags=0): """ Instruct the plug-in to get ready """ self._tp.rpc('plugin_register', _del_self(locals())) # Checks to see if any unix domain sockets exist in the base directory # and opens a socket to one to see if the server is actually there. # @param self The this pointer # @returns True if daemon appears to be present, else false. @staticmethod def _check_daemon_exists(): uds_path = Client._plugin_uds_path() if os.path.exists(uds_path): for root, sub_folders, files in os.walk(uds_path): for filename in files: uds = os.path.join(root, filename) try: # This operation will work if the daemon is available s = _TransPort.get_socket(uds) s.close() return True except LsmError: pass else: # Base directory is not present? pass return False @staticmethod def _plugin_uds_path(): rc = _UDS_PATH if 'LSM_UDS_PATH' in os.environ: rc = os.environ['LSM_UDS_PATH'] return rc # Class constructor # @param self The this pointer # @param uri The uniform resource identifier # @param plain_text_password Password as plain text (Optional) # @param timeout_ms The timeout in ms # @param flags Reserved for future use, must be zero. # @returns None def __init__(self, uri, plain_text_password=None, timeout_ms=30000, flags=0): self._uri = uri self._password = plain_text_password self._timeout = timeout_ms self._uds_path = Client._plugin_uds_path() u = uri_parse(uri, ['scheme']) scheme = u['scheme'] if "+" in scheme: (plug, proto) = scheme.split("+") scheme = plug # See if the user of the library is the command line inteface which is wanting to # locally fork & exec the plugin for development debug_fd = os.getenv('LSMCLI_DEBUG_FD') if debug_fd: try: self._tp = _TransPort( socket.fromfd(int(debug_fd), socket.AF_UNIX, socket.SOCK_STREAM)) except Exception as e: raise LsmError(ErrorNumber.INVALID_ARGUMENT, "LSMCLI_DEBUG_FD: %s" % str(e)) else: self.plugin_path = os.path.join(self._uds_path, scheme) if os.path.exists(self.plugin_path): self._tp = _TransPort(_TransPort.get_socket(self.plugin_path)) else: # At this point we don't know if the user specified an incorrect # plug-in in the URI or the daemon isn't started. We will check # the directory for other unix domain sockets. if Client._check_daemon_exists(): raise LsmError(ErrorNumber.PLUGIN_NOT_EXIST, "Plug-in %s not found!" % self.plugin_path) else: _raise_no_daemon() self.__start(uri, plain_text_password, timeout_ms, flags) # Synonym for close. @_return_requires(None) def plugin_unregister(self, flags=FLAG_RSVD): """ Synonym for close. """ self.close(flags) # Does an orderly plugin_unregister of the plug-in # @param self The this pointer # @param flags Reserved for future use, must be zero. @_return_requires(None) def close(self, flags=FLAG_RSVD): """ Does an orderly plugin_unregister of the plug-in """ self._tp.rpc('plugin_unregister', _del_self(locals())) self._tp.close() self._tp = None # Retrieves all the available plug-ins # @param field_sep Field separator # @param flags: Reserved for future use @staticmethod @_return_requires([six.string_types[0]]) def available_plugins(field_sep=':', flags=FLAG_RSVD): """ Retrieves all the available plug-ins Return list of strings of available plug-ins with the "desc<sep>version" """ rc = [] if not Client._check_daemon_exists(): _raise_no_daemon() uds_path = Client._plugin_uds_path() for root, sub_folders, files in os.walk(uds_path): for filename in files: uds = os.path.join(root, filename) # Exclude files that are not sockets mode = os.stat(uds).st_mode if not S_ISSOCK(mode): continue tp = _TransPort(_TransPort.get_socket(uds)) i, v = tp.rpc('plugin_info', dict(flags=flags)) rc.append("%s%s%s" % (i, field_sep, v)) tp.close() return rc # Sets the timeout for the plug-in # @param self The this pointer # @param ms Time-out in ms # @param flags Reserved for future use, must be zero. @_return_requires(None) def time_out_set(self, ms, flags=FLAG_RSVD): """ Sets any time-outs for the plug-in (ms) Return None on success, else LsmError exception """ return self._tp.rpc('time_out_set', _del_self(locals())) # Retrieves the current time-out value. # @param self The this pointer # @param flags Reserved for future use, must be zero. # @returns Time-out value @_return_requires(int) def time_out_get(self, flags=FLAG_RSVD): """ Retrieves the current time-out Return time-out in ms, else raise LsmError """ return self._tp.rpc('time_out_get', _del_self(locals())) # Retrieves the status of the specified job id. # @param self The this pointer # @param job_id The job identifier # @param flags Reserved for future use, must be zero. # @returns A tuple ( status (enumeration), percent_complete, # completed item) @_return_requires(int, int, _IData) def job_status(self, job_id, flags=FLAG_RSVD): """ Returns the stats of the given job. Returns a tuple ( status (enumeration), percent_complete, completed item). else LsmError exception. """ return self._tp.rpc('job_status', _del_self(locals())) # Frees the resources for the specified job id. # @param self The this pointer # @param job_id Job id in which to release resource for # @param flags Reserved for future use, must be zero. @_return_requires(None) def job_free(self, job_id, flags=FLAG_RSVD): """ Frees resources for a given job number. Returns None on success, else raises an LsmError """ return self._tp.rpc('job_free', _del_self(locals())) # Gets the capabilities of the array. # @param self The this pointer # @param system The system of interest # @param flags Reserved for future use, must be zero. # @returns Capability object @_return_requires(Capabilities) def capabilities(self, system, flags=FLAG_RSVD): """ Fetches the capabilities of the array Returns a capability object, see data,py for details. """ return self._tp.rpc('capabilities', _del_self(locals())) # Gets information about the plug-in # @param self The this pointer # @param flags Reserved for future use # @returns Tuple (description, version) @_return_requires(six.string_types[0], six.string_types[0]) def plugin_info(self, flags=FLAG_RSVD): """ Returns a description and version of plug-in """ return self._tp.rpc('plugin_info', _del_self(locals())) # Returns an array of pool objects. # @param self The this pointer # @param search_key Search key # @param search_value Search value # @param flags Reserved for future use, must be zero. # @returns An array of pool objects. @_return_requires([Pool]) def pools(self, search_key=None, search_value=None, flags=FLAG_RSVD): """ Returns an array of pool objects. Pools are used in both block and file system interfaces, thus the reason they are in the base class. """ _check_search_key(search_key, Pool.SUPPORTED_SEARCH_KEYS) return self._tp.rpc('pools', _del_self(locals())) # Returns an array of system objects. # @param self The this pointer # @param flags Reserved for future use, must be zero. # @returns An array of system objects. @_return_requires([System]) def systems(self, flags=FLAG_RSVD): """ Returns an array of system objects. System information is used to distinguish resources from on storage array to another when the plug=in supports the ability to have more than one array managed by it """ return self._tp.rpc('systems', _del_self(locals())) # Changes the read cache percentage for a system. # @param self The this pointer # @param system System object to target # @param read_pct Desired read cache percentage # @param flags Flags # @returns None on success, else raises LsmError @_return_requires(None) def system_read_cache_pct_update(self, system, read_pct, flags=FLAG_RSVD): """ lsm.Client.system_read_cache_pct_update(self, system, read_pct, flags=lsm.Client.FLAG_RSVD) Version: 1.3 Usage: This method updates the read cache percentage on a system if supported Parameters: system(lsm.System) an lsm.System object. read_pct(int) the desired read cache percentage. flags (int) Optional. Reserved for future use. Should be set as lsm.Client.FLAG_RSVD. Returns: returns None on success, else raises LsmError on errors. SpecialExceptions: """ if sys.version_info[0] == 2: if not isinstance(read_pct, (int, long)): raise LsmError(ErrorNumber.INVALID_ARGUMENT, "Invalid read_pct, should be an integer") else: if not isinstance(read_pct, int): raise LsmError(ErrorNumber.INVALID_ARGUMENT, "Invalid read_pct, should be an integer") if read_pct > 100 or read_pct < 0: raise LsmError(ErrorNumber.INVALID_ARGUMENT, "Invalid read_pct, should be in range 0 - 100") return self._tp.rpc('system_read_cache_pct_update', _del_self(locals())) # Register a user/password for the specified initiator for CHAP # authentication. # Note: If you pass an empty user and password the expected behavior is to # remove any authentication for the specified initiator. # @param self The this pointer # @param init_id The initiator ID # @param in_user User for inbound CHAP # @param in_password Password for inbound CHAP # @param out_user Outbound username # @param out_password Outbound password # @param flags Reserved for future use, must be zero. # @returns None on success, throws LsmError on errors. @_return_requires(None) def iscsi_chap_auth(self, init_id, in_user, in_password, out_user, out_password, flags=FLAG_RSVD): """ Register a user/password for the specified initiator for CHAP authentication. """ AccessGroup.initiator_id_verify(init_id, AccessGroup.INIT_TYPE_ISCSI_IQN, raise_exception=True) return self._tp.rpc('iscsi_chap_auth', _del_self(locals())) # Returns an array of volume objects # @param self The this pointer # @param search_key Search key to use # @param search_value Search value # @param flags Reserved for future use, must be zero. # @returns An array of volume objects. @_return_requires([Volume]) def volumes(self, search_key=None, search_value=None, flags=FLAG_RSVD): """ Returns an array of volume objects """ _check_search_key(search_key, Volume.SUPPORTED_SEARCH_KEYS) return self._tp.rpc('volumes', _del_self(locals())) # Creates a volume # @param self The this pointer # @param pool The pool object to allocate storage from # @param volume_name The human text name for the volume # @param size_bytes Size of the volume in bytes # @param provisioning How the volume is to be provisioned # @param flags Reserved for future use, must be zero. # @returns A tuple (job_id, new volume), when one is None the other is # valid. @_return_requires(six.string_types[0], Volume) def volume_create(self, pool, volume_name, size_bytes, provisioning, flags=FLAG_RSVD): """ Creates a volume, given a pool, volume name, size and provisioning returns a tuple (job_id, new volume) Note: Tuple return values are mutually exclusive, when one is None the other must be valid. """ return self._tp.rpc('volume_create', _del_self(locals())) # Re-sizes a volume # @param self The this pointer # @param volume The volume object to re-size # @param new_size_bytes Size of the volume in bytes # @param flags Reserved for future use, must be zero. # @returns A tuple (job_id, new re-sized volume), when one is # None the other is valid. @_return_requires(six.string_types[0], Volume) def volume_resize(self, volume, new_size_bytes, flags=FLAG_RSVD): """ Re-sizes a volume. Returns a tuple (job_id, re-sized_volume) Note: Tuple return values are mutually exclusive, when one is None the other must be valid. """ return self._tp.rpc('volume_resize', _del_self(locals())) # Replicates a volume from the specified pool. # @param self The this pointer # @param pool The pool to re-size from # @param rep_type Replication type # (enumeration,see common.data.Volume) # @param volume_src The volume to replicate # @param name Human readable name of replicated volume # @param flags Reserved for future use, must be zero. # @returns A tuple (job_id, new replicated volume), when one is # None the other is valid. @_return_requires(six.string_types[0], Volume) def volume_replicate(self, pool, rep_type, volume_src, name, flags=FLAG_RSVD): """ Replicates a volume from the specified pool. Returns a tuple (job_id, replicated volume) Note: Tuple return values are mutually exclusive, when one is None the other must be valid. """ return self._tp.rpc('volume_replicate', _del_self(locals())) # Size of a replicated block. # @param self The this pointer # @param system The system to request the rep. block range size from # @param flags Reserved for future use, must be zero # @returns Size of the replicated block in bytes @_return_requires(int) def volume_replicate_range_block_size(self, system, flags=FLAG_RSVD): """ Returns the size of a replicated block in bytes. """ return self._tp.rpc('volume_replicate_range_block_size', _del_self(locals())) # Replicates a portion of a volume to itself or another volume. # @param self The this pointer # @param rep_type Replication type # (enumeration, see common.data.Volume) # @param volume_src The volume src to replicate from # @param volume_dest The volume dest to replicate to # @param ranges An array of Block range objects # @see lsm.common.data.BlockRange # @param flags Reserved for future use, must be zero. # @returns Job id or None when completed, else raises LsmError on errors. @_return_requires(six.string_types[0]) def volume_replicate_range(self, rep_type, volume_src, volume_dest, ranges, flags=FLAG_RSVD): """ Replicates a portion of a volume to itself or another volume. The src, dest and number of blocks values change with vendor, call volume_replicate_range_block_size to get block unit size. Returns Job id or None when completed, else raises LsmError on errors. """ return self._tp.rpc('volume_replicate_range', _del_self(locals())) # Deletes a volume # @param self The this pointer # @param volume The volume object which represents the volume to delete # @param flags Reserved for future use, must be zero. # @returns None on success, else job id. Raises LsmError on errors. @_return_requires(six.string_types[0]) def volume_delete(self, volume, flags=FLAG_RSVD): """ Deletes a volume. Returns None on success, else job id """ return self._tp.rpc('volume_delete', _del_self(locals())) # Makes a volume online and available to the host. # @param self The this pointer # @param volume The volume to place online # @param flags Reserved for future use, must be zero. # @returns None on success, else raises LsmError @_return_requires(None) def volume_enable(self, volume, flags=FLAG_RSVD): """ Makes a volume available to the host returns None on success, else raises LsmError on errors. """ return self._tp.rpc('volume_enable', _del_self(locals())) # Takes a volume offline # @param self The this pointer # @param volume The volume object # @param flags Reserved for future use, must be zero. # @returns None on success, else raises LsmError on errors. @_return_requires(None) def volume_disable(self, volume, flags=FLAG_RSVD): """ Makes a volume unavailable to the host returns None on success, else raises LsmError on errors. """ return self._tp.rpc('volume_disable', _del_self(locals())) # Returns an array of disk objects # @param self The this pointer # @param search_key Search Key # @param search_value Search value # @param flags When equal to DISK.FLAG_RETRIEVE_FULL_INFO # returned objects will contain optional data. # If not defined, only the mandatory properties will # be returned. # @returns An array of disk objects. @_return_requires([Disk]) def disks(self, search_key=None, search_value=None, flags=FLAG_RSVD): """ Returns an array of disk objects """ _check_search_key(search_key, Disk.SUPPORTED_SEARCH_KEYS) return self._tp.rpc('disks', _del_self(locals())) # Access control for allowing an access group to access a volume # @param self The this pointer # @param access_group The access group # @param volume The volume to grant access to # @param flags Reserved for future use, must be zero. # @returns None on success, throws LsmError on errors. @_return_requires(None) def volume_mask(self, access_group, volume, flags=FLAG_RSVD): """ Allows an access group to access a volume. """ return self._tp.rpc('volume_mask', _del_self(locals())) # Revokes access to a volume to initiators in an access group # @param self The this pointer # @param access_group The access group # @param volume The volume to grant access to # @param flags Reserved for future use, must be zero. # @returns None on success, throws LsmError on errors. @_return_requires(None) def volume_unmask(self, access_group, volume, flags=FLAG_RSVD): """ Revokes access for an access group for a volume """ return self._tp.rpc('volume_unmask', _del_self(locals())) # Returns a list of access group objects # @param self The this pointer # @param search_key Search Key # @param search_value Search value # @param flags Reserved for future use, must be zero. # @returns List of access groups @_return_requires([AccessGroup]) def access_groups(self, search_key=None, search_value=None, flags=FLAG_RSVD): """ Returns a list of access groups """ _check_search_key(search_key, AccessGroup.SUPPORTED_SEARCH_KEYS) return self._tp.rpc('access_groups', _del_self(locals())) # Creates an access a group with the specified initiator in it. # @param self The this pointer # @param name The initiator group name # @param init_id Initiator id # @param init_type Type of initiator (Enumeration) # @param system Which system to create this group on # @param flags Reserved for future use, must be zero. # @returns AccessGroup on success, else raises LsmError @_return_requires(AccessGroup) def access_group_create(self, name, init_id, init_type, system, flags=FLAG_RSVD): """ Creates an access group and add the specified initiator id, init_type and desired access. """ init_type, init_id = AccessGroup.initiator_id_verify( init_id, init_type, raise_exception=True)[1:] return self._tp.rpc('access_group_create', _del_self(locals())) # Deletes an access group. # @param self The this pointer # @param access_group The access group to delete # @param flags Reserved for future use, must be zero. # @returns None on success, throws LsmError on errors. @_return_requires(None) def access_group_delete(self, access_group, flags=FLAG_RSVD): """ Deletes an access group """ return self._tp.rpc('access_group_delete', _del_self(locals())) # Adds an initiator to an access group # @param self The this pointer # @param access_group Group to add initiator to # @param init_id Initiators id # @param init_type Initiator id type (enumeration) # @param flags Reserved for future use, must be zero. # @returns None on success, throws LsmError on errors. @_return_requires(AccessGroup) def access_group_initiator_add(self, access_group, init_id, init_type, flags=FLAG_RSVD): """ Adds an initiator to an access group """ init_type, init_id = AccessGroup.initiator_id_verify( init_id, init_type, raise_exception=True)[1:] return self._tp.rpc('access_group_initiator_add', _del_self(locals())) # Deletes an initiator from an access group # @param self The this pointer # @param access_group The access group to remove initiator from # @param init_id The initiator to remove from the group # @param init_type Initiator id type (enumeration) # @param flags Reserved for future use, must be zero. # @returns None on success, throws LsmError on errors. @_return_requires(AccessGroup) def access_group_initiator_delete(self, access_group, init_id, init_type, flags=FLAG_RSVD): """ Deletes an initiator from an access group """ init_id = AccessGroup.initiator_id_verify(init_id, None, raise_exception=True)[2] return self._tp.rpc('access_group_initiator_delete', _del_self(locals())) # Returns the list of volumes that access group has access to. # @param self The this pointer # @param access_group The access group to list volumes for # @param flags Reserved for future use, must be zero. # @returns list of volumes @_return_requires([Volume]) def volumes_accessible_by_access_group(self, access_group, flags=FLAG_RSVD): """ Returns the list of volumes that access group has access to. """ return self._tp.rpc('volumes_accessible_by_access_group', _del_self(locals())) # Returns the list of access groups that have access to the specified # volume. # @param self The this pointer # @param volume The volume to list access groups for # @param flags Reserved for future use, must be zero. # @returns list of access groups @_return_requires([AccessGroup]) def access_groups_granted_to_volume(self, volume, flags=FLAG_RSVD): """ Returns the list of access groups that have access to the specified volume. """ return self._tp.rpc('access_groups_granted_to_volume', _del_self(locals())) # Checks to see if a volume has child dependencies. # @param self The this pointer # @param volume The volume to check # @param flags Reserved for future use, must be zero. # @returns True or False @_return_requires(bool) def volume_child_dependency(self, volume, flags=FLAG_RSVD): """ Returns True if this volume has other volumes which are dependant on it. Implies that this volume cannot be deleted or possibly modified because it would affect its children. """ return self._tp.rpc('volume_child_dependency', _del_self(locals())) # Removes any child dependency. # @param self The this pointer # @param volume The volume to remove dependencies for # @param flags Reserved for future use, must be zero. # @returns None if complete, else job id. @_return_requires(six.string_types[0]) def volume_child_dependency_rm(self, volume, flags=FLAG_RSVD): """ If this volume has child dependency, this method call will fully replicate the blocks removing the relationship between them. This should return None (success) if volume_child_dependency would return False. Note: This operation could take a very long time depending on the size of the volume and the number of child dependencies. Returns None if complete else job id, raises LsmError on errors. """ return self._tp.rpc('volume_child_dependency_rm', _del_self(locals())) # Returns a list of file system objects. # @param self The this pointer # @param search_key Search Key # @param search_value Search value # @param flags Reserved for future use, must be zero. # @returns A list of FS objects. @_return_requires([FileSystem]) def fs(self, search_key=None, search_value=None, flags=FLAG_RSVD): """ Returns a list of file systems on the controller. """ _check_search_key(search_key, FileSystem.SUPPORTED_SEARCH_KEYS) return self._tp.rpc('fs', _del_self(locals())) # Deletes a file system # @param self The this pointer # @param fs The file system to delete # @param flags Reserved for future use, must be zero. # @returns None on success, else job id @_return_requires(six.string_types[0]) def fs_delete(self, fs, flags=FLAG_RSVD): """ WARNING: Destructive Deletes a file system and everything it contains Returns None on success, else job id """ return self._tp.rpc('fs_delete', _del_self(locals())) # Re-sizes a file system # @param self The this pointer # @param fs The file system to re-size # @param new_size_bytes The new size of the file system in bytes # @param flags Reserved for future use, must be zero. # @returns tuple (job_id, re-sized file system), # When one is None the other is valid @_return_requires(six.string_types[0], FileSystem) def fs_resize(self, fs, new_size_bytes, flags=FLAG_RSVD): """ Re-size a file system Returns a tuple (job_id, re-sized file system) Note: Tuple return values are mutually exclusive, when one is None the other must be valid. """ return self._tp.rpc('fs_resize', _del_self(locals())) # Creates a file system. # @param self The this pointer # @param pool The pool object to allocate space from # @param name The human text name for the file system # @param size_bytes The size of the file system in bytes # @param flags Reserved for future use, must be zero. # @returns tuple (job_id, file system), # When one is None the other is valid @_return_requires(six.string_types[0], FileSystem) def fs_create(self, pool, name, size_bytes, flags=FLAG_RSVD): """ Creates a file system given a pool, name and size. Note: size is limited to 2**64 bytes Returns a tuple (job_id, file system) Note: Tuple return values are mutually exclusive, when one is None the other must be valid. """ return self._tp.rpc('fs_create', _del_self(locals())) # Clones a file system # @param self The this pointer # @param src_fs The source file system to clone # @param dest_fs_name The destination file system clone name # @param snapshot Optional, create clone from previous snapshot # @param flags Reserved for future use, must be zero. # @returns tuple (job_id, file system) @_return_requires(six.string_types[0], FileSystem) def fs_clone(self, src_fs, dest_fs_name, snapshot=None, flags=FLAG_RSVD): """ Creates a thin, point in time read/writable copy of src to dest. Optionally uses snapshot as backing of src_fs Returns a tuple (job_id, file system) Note: Tuple return values are mutually exclusive, when one is None the other must be valid. """ return self._tp.rpc('fs_clone', _del_self(locals())) # Clones an individual file or files on the specified file system # @param self The this pointer # @param fs The file system the files are on # @param src_file_name The source file name # @param dest_file_name The dest. file name # @param snapshot Optional, the snapshot to base clone source # file from # @param flags Reserved for future use, must be zero. # @returns None on success, else job id @_return_requires(six.string_types[0]) def fs_file_clone(self, fs, src_file_name, dest_file_name, snapshot=None, flags=FLAG_RSVD): """ Creates a thinly provisioned clone of src to dest. Note: Source and Destination are required to be on same filesystem and all directories in destination path need to exist. Returns None on success, else job id """ return self._tp.rpc('fs_file_clone', _del_self(locals())) # Returns a list of snapshots # @param self The this pointer # @param fs The file system # @param flags Reserved for future use, must be zero. # @returns a list of snapshot objects. @_return_requires([FsSnapshot]) def fs_snapshots(self, fs, flags=FLAG_RSVD): """ Returns a list of snapshot names for the supplied file system """ return self._tp.rpc('fs_snapshots', _del_self(locals())) # Creates a snapshot (Point in time read only copy) # @param self The this pointer # @param fs The file system to snapshot # @param snapshot_name The human readable snapshot name # @param flags Reserved for future use, must be zero. # @returns tuple (job_id, snapshot) @_return_requires(six.string_types[0], FsSnapshot) def fs_snapshot_create(self, fs, snapshot_name, flags=FLAG_RSVD): """ Snapshot is a point in time read-only copy Create a snapshot on the chosen file system. Returns a tuple (job_id, snapshot) Notes: - Snapshot name may not match what was passed in (depends on array implementation) - Tuple return values are mutually exclusive, when one is None the other must be valid. """ return self._tp.rpc('fs_snapshot_create', _del_self(locals())) # Deletes a snapshot # @param self The this pointer # @param fs The filesystem the snapshot it for # @param snapshot The specific snap shot to delete # @param flags Reserved for future use, must be zero. # @returns None on success, else job id @_return_requires(six.string_types[0]) def fs_snapshot_delete(self, fs, snapshot, flags=FLAG_RSVD): """ Frees the re-sources for the given snapshot on the supplied filesystem. Returns None on success else job id, LsmError exception on error """ return self._tp.rpc('fs_snapshot_delete', _del_self(locals())) # Reverts a snapshot # @param self The this pointer # @param fs The file system object to restore snapshot for # @param snapshot The snapshot file to restore back too # @param files The specific files to restore # @param restore_files Individual files to restore # @param all_files Set to True if all files should be restored # back # @param flags Reserved for future use, must be zero. # @return None on success, else job id @_return_requires(six.string_types[0]) def fs_snapshot_restore(self, fs, snapshot, files, restore_files, all_files=False, flags=FLAG_RSVD): """ WARNING: Destructive! Reverts a file-system or just the specified files from the snapshot. If a list of files is supplied but the array cannot restore just them then the operation will fail with an LsmError raised. If files == None and all_files = True then all files on the file-system are restored. Restore_file if None none must be the same length as files with each index in each list referring to the associated file. Returns None on success, else job id, LsmError exception on error """ return self._tp.rpc('fs_snapshot_restore', _del_self(locals())) # Checks to see if a file system has child dependencies. # @param fs The file system to check # @param files The files to check (optional) # @param flags Reserved for future use, must be zero. # @returns True or False @_return_requires(bool) def fs_child_dependency(self, fs, files, flags=FLAG_RSVD): """ Returns True if the specified filesystem or specified file on this file system has child dependencies. This implies that this filesystem or specified file on this file system cannot be deleted or possibly modified because it would affect its children. """ return self._tp.rpc('fs_child_dependency', _del_self(locals())) # Removes child dependencies from a FS or specific file. # @param self The this pointer # @param fs The file system to remove child dependencies for # @param files The list of files to remove child dependencies (opt.) # @param flags Reserved for future use, must be zero. # @returns None if complete, else job id. @_return_requires(six.string_types[0]) def fs_child_dependency_rm(self, fs, files, flags=FLAG_RSVD): """ If this filesystem or specified file on this filesystem has child dependency this method will fully replicate the blocks removing the relationship between them. This should return None(success) if fs_child_dependency would return False. Note: This operation could take a very long time depending on the size of the filesystem and the number of child dependencies. Returns None if completed, else job id. Raises LsmError on errors. """ return self._tp.rpc('fs_child_dependency_rm', _del_self(locals())) # Returns a list of all the NFS client authentication types. # @param self The this pointer # @param flags Reserved for future use, must be zero. # @returns An array of client authentication types. @_return_requires([six.string_types[0]]) def export_auth(self, flags=FLAG_RSVD): """ What types of NFS client authentication are supported. """ return self._tp.rpc('export_auth', _del_self(locals())) # Returns a list of all the exported file systems # @param self The this pointer # @param search_key Search Key # @param search_value Search value # @param flags Reserved for future use, must be zero. # @returns An array of export objects @_return_requires([NfsExport]) def exports(self, search_key=None, search_value=None, flags=FLAG_RSVD): """ Get a list of all exported file systems on the controller. """ _check_search_key(search_key, NfsExport.SUPPORTED_SEARCH_KEYS) return self._tp.rpc('exports', _del_self(locals())) # Exports a FS as specified in the export. # @param self The this pointer # @param fs_id The FS ID to export # @param export_path The export path (Set to None for array to pick) # @param root_list List of hosts with root access # @param rw_list List of hosts with read/write access # @param ro_list List of hosts with read only access # @param anon_uid UID to map to anonymous # @param anon_gid GID to map to anonymous # @param auth_type NFS client authentication type # @param options Options to pass to plug-in # @param flags Reserved for future use, must be zero. # @returns NfsExport on success, else raises LsmError @_return_requires(NfsExport) def export_fs(self, fs_id, export_path, root_list, rw_list, ro_list, anon_uid=NfsExport.ANON_UID_GID_NA, anon_gid=NfsExport.ANON_UID_GID_NA, auth_type=None, options=None, flags=FLAG_RSVD): """ Exports a filesystem as specified in the arguments """ if set(rw_list) - (set(rw_list) - set(ro_list)): raise LsmError(ErrorNumber.INVALID_ARGUMENT, "Host cannot both in rw_list and ro_list.") return self._tp.rpc('export_fs', _del_self(locals())) # Removes the specified export # @param self The this pointer # @param export The export to remove # @param flags Reserved for future use, must be zero. # @returns None on success, else raises LsmError @_return_requires(None) def export_remove(self, export, flags=FLAG_RSVD): """ Removes the specified export """ return self._tp.rpc('export_remove', _del_self(locals())) # Returns a list of target ports # @param self The this pointer # @param search_key The key to search against # @param search_value The value to search for # @param flags Reserved for future use, must be zero # @returns List of target ports, else raises LsmError @_return_requires([TargetPort]) def target_ports(self, search_key=None, search_value=None, flags=FLAG_RSVD): """ Returns a list of target ports """ _check_search_key(search_key, TargetPort.SUPPORTED_SEARCH_KEYS) return self._tp.rpc('target_ports', _del_self(locals())) # Returns the RAID information of certain volume # @param self The this pointer # @param volume The volume to retrieve RAID information for # @param flags Reserved for future use, must be zero # @returns [raid_type, strip_size, disk_count, min_io_size, opt_io_size], # else raises LsmError @_return_requires([int, int, int, int, int]) def volume_raid_info(self, volume, flags=FLAG_RSVD): """Query the RAID information of certain volume. New in version 1.2. Query the RAID type, strip size, extents count, minimum I/O size, optimal I/O size of given volume. This method requires this capability: lsm.Capabilities.VOLUME_RAID_INFO Args: volume (Volume object): Volume to query flags (int): Reserved for future use. Should be set as lsm.Client.FLAG_RSVD Returns: [raid_type, strip_size, disk_count, min_io_size, opt_io_size] raid_type (int): RAID Type of requested volume. Could be one of these values: Volume.RAID_TYPE_RAID0 Stripe Volume.RAID_TYPE_RAID1 Two disks Mirror Volume.RAID_TYPE_RAID3 Byte-level striping with dedicated parity Volume.RAID_TYPE_RAID4 Block-level striping with dedicated parity Volume.RAID_TYPE_RAID5 Block-level striping with distributed parity Volume.RAID_TYPE_RAID6 Block-level striping with two distributed parities, aka, RAID-DP Volume.RAID_TYPE_RAID10 Stripe of mirrors Volume.RAID_TYPE_RAID15 Parity of mirrors Volume.RAID_TYPE_RAID16 Dual parity of mirrors Volume.RAID_TYPE_RAID50 Stripe of parities Volume.RAID_TYPE_RAID60 Stripe of dual parities Volume.RAID_TYPE_RAID51 Mirror of parities Volume.RAID_TYPE_RAID61 Mirror of dual parities Volume.RAID_TYPE_JBOD Just bunch of disks, no parity, no striping. Volume.RAID_TYPE_UNKNOWN The plugin failed to detect the volume's RAID type. Volume.RAID_TYPE_MIXED This volume contains multiple RAID settings. Volume.RAID_TYPE_OTHER Vendor specific RAID type strip_size(int): The size of strip on each disk or other storage extent. For RAID1/JBOD, it should be set as sector size. If plugin failed to detect strip size, it should be set as Volume.STRIP_SIZE_UNKNOWN(0). disk_count(int): The count of disks used for assembling the RAID group(s) where this volume allocated from. For any RAID system using the slice of disk, this value indicate how many disk slices are used for the RAID. For example, on LVM RAID, the 'disk_count' here indicate the count of PVs used for certain volume. Another example, on EMC VMAX, the 'disk_count' here indicate how many hyper volumes are used for this volume. For any RAID system using remote LUN for data storing, each remote LUN should be count as a disk. If the plugin failed to detect disk_count, it should be set as Volume.DISK_COUNT_UNKNOWN(0). min_io_size(int): The minimum I/O size, device preferred I/O size for random I/O. Any I/O size not equal to a multiple of this value may get significant speed penalty. Normally it refers to strip size of each disk(extent). If plugin failed to detect min_io_size, it should try these values in the sequence of: logical sector size -> physical sector size -> Volume.MIN_IO_SIZE_UNKNOWN(0). opt_io_size(int): The optimal I/O size, device preferred I/O size for sequential I/O. Normally it refers to RAID group stripe size. If plugin failed to detect opt_io_size, it should be set to Volume.OPT_IO_SIZE_UNKNOWN(0). Raises: LsmError: ErrorNumber.NO_SUPPORT No support. """ return self._tp.rpc('volume_raid_info', _del_self(locals())) # Query the membership information of specified pool # @param self The this pointer # @param pool The pool to query # @param flags Reserved for future use, must be zero # @returns [raid_type, member_type, [member_ids]], lsmError on error @_return_requires([int, int, [six.string_types[0]]]) def pool_member_info(self, pool, flags=FLAG_RSVD): """ lsm.Client.pool_member_info(self, pool, flags=lsm.Client.FLAG_RSVD) Version: 1.2 Usage: Query the membership information of certain pool: RAID type, member type and member ids. Currently, LibStorageMgmt supports two types of pool: * Sub-pool -- Pool.MEMBER_TYPE_POOL Pool space is allocated from parent pool. Example: * NetApp ONTAP volume * Disk RAID pool -- Pool.MEMBER_TYPE_DISK Pool is a RAID group assembled by disks. Example: * LSI MegaRAID disk group * EMC VNX pool * NetApp ONTAP aggregate Parameters: pool (lsm.Pool object) Pool to query flags (int) Optional. Reserved for future use. Should be set as lsm.Client.FLAG_RSVD. Returns: [raid_type, member_type, member_ids] raid_type (int) RAID Type of requested pool. Could be one of these values: Volume.RAID_TYPE_RAID0 Stripe Volume.RAID_TYPE_RAID1 Two disks Mirror Volume.RAID_TYPE_RAID3 Byte-level striping with dedicated parity Volume.RAID_TYPE_RAID4 Block-level striping with dedicated parity Volume.RAID_TYPE_RAID5 Block-level striping with distributed parity Volume.RAID_TYPE_RAID6 Block-level striping with two distributed parities, aka, RAID-DP Volume.RAID_TYPE_RAID10 Stripe of mirrors Volume.RAID_TYPE_RAID15 Parity of mirrors Volume.RAID_TYPE_RAID16 Dual parity of mirrors Volume.RAID_TYPE_RAID50 Stripe of parities Volume.RAID_TYPE_RAID60 Stripe of dual parities Volume.RAID_TYPE_RAID51 Mirror of parities Volume.RAID_TYPE_RAID61 Mirror of dual parities Volume.RAID_TYPE_JBOD Just bunch of disks, no parity, no striping. Volume.RAID_TYPE_UNKNOWN The plugin failed to detect the volume's RAID type. Volume.RAID_TYPE_MIXED This pool contains multiple RAID settings. Volume.RAID_TYPE_OTHER Vendor specific RAID type member_type (int) Could be one of these values: Pool.MEMBER_TYPE_POOL Current pool(also known as sub-pool) is allocated from other pool(parent pool). The 'raid_type' will set to RAID_TYPE_OTHER unless certain RAID system support RAID using space of parent pools. Pool.MEMBER_TYPE_DISK Pool is created from RAID group using whole disks. Pool.MEMBER_TYPE_OTHER Vendor specific RAID member type. Pool.MEMBER_TYPE_UNKNOWN Plugin failed to detect the RAID member type. member_ids (list of strings) When 'member_type' is Pool.MEMBER_TYPE_POOL, the 'member_ids' will contain a list of parent Pool IDs. When 'member_type' is Pool.MEMBER_TYPE_DISK, the 'member_ids' will contain a list of disk IDs. When 'member_type' is Pool.MEMBER_TYPE_OTHER or Pool.MEMBER_TYPE_UNKNOWN, the member_ids should be an empty list. SpecialExceptions: LsmError ErrorNumber.NO_SUPPORT ErrorNumber.NOT_FOUND_POOL Capability: lsm.Capabilities.POOL_MEMBER_INFO """ return self._tp.rpc('pool_member_info', _del_self(locals())) # Queries all the supported RAID types and stripe sizes which could be # used for input into volume_raid_create # @param self The this pointer # @param system System (raid) card to query # @param flags Reserved for future use, must be zero # @returns [raid_types, strip_sizes], lsmError on error @_return_requires([[int], [int]]) def volume_raid_create_cap_get(self, system, flags=FLAG_RSVD): """ lsm.Client.volume_raid_create_cap_get( self, system, flags=lsm.Client.FLAG_RSVD) Version: 1.2 Usage: This method is dedicated to local hardware RAID cards. Query out all supported RAID types and strip sizes which could be used by lsm.Client.volume_raid_create() method. Parameters: system (lsm.System) Instance of lsm.System flags (int) Optional. Reserved for future use. Should be set as lsm.Client.FLAG_RSVD. Returns: [raid_types, strip_sizes] raid_types ([int]) List of integer, possible values are: Volume.RAID_TYPE_RAID0 Volume.RAID_TYPE_RAID1 Volume.RAID_TYPE_RAID5 Volume.RAID_TYPE_RAID6 Volume.RAID_TYPE_RAID10 Volume.RAID_TYPE_RAID50 Volume.RAID_TYPE_RAID60 strip_sizes ([int]) List of integer. Stripe size in bytes. SpecialExceptions: LsmError lsm.ErrorNumber.NO_SUPPORT Method not supported. Sample: lsm_client = lsm.Client('sim://') lsm_sys = lsm_client.systems()[0] disks = lsm_client.disks( search_key='system_id', search_value=lsm_sys.id) free_disks = [d for d in disks if d.status == Disk.STATUS_FREE] supported_raid_types, supported_strip_sizes = \ lsm_client.volume_raid_create_cap_get(lsm_sys) new_vol = lsm_client.volume_raid_create( 'test_volume_raid_create', supported_raid_types[0], free_disks, supported_strip_sizes[0]) Capability: lsm.Capabilities.VOLUME_CREATE_RAID This method is mandatory when volume_raid_create() is supported. """ return self._tp.rpc('volume_raid_create_cap_get', _del_self(locals())) # Create a disk RAID pool and allocate entire storage space to new volume # @param self The this pointer # @param name Name of the raid to be created # @param raid_type The raid type (enumerated) of the raid group # @param disks List of disk objects to use # @param strip_size Strip size in bytes # @param flags Flags # @returns the newly created volume, lsmError on errors @_return_requires(Volume) def volume_raid_create(self, name, raid_type, disks, strip_size, flags=FLAG_RSVD): """ lsm.Client.volume_raid_create(self, name, raid_type, disks, strip_size, flags=lsm.Client.FLAG_RSVD) Version: 1.2 Usage: This method is dedicated to local hardware RAID cards. Create a disk RAID pool and allocate entire storage space to new volume using requested volume name. When dealing with RAID10, 50 or 60, the first half part of 'disks' will be located in one bottom layer RAID group. The new volume and new pool will created within the same system of provided disks. This method does not allow duplicate call, when duplicate call was issued, LsmError with ErrorNumber.DISK_NOT_FREE will be raise. User should check disk.status for Disk.STATUS_FREE before invoking this method. Parameters: name (string) The name for new volume. The requested volume name might be ignored due to restriction of hardware RAID vendors. The pool name will be automatically chosen by plugin. raid_type (int) The RAID type for the RAID group, possible values are: Volume.RAID_TYPE_RAID0 Volume.RAID_TYPE_RAID1 Volume.RAID_TYPE_RAID5 Volume.RAID_TYPE_RAID6 Volume.RAID_TYPE_RAID10 Volume.RAID_TYPE_RAID15 Volume.RAID_TYPE_RAID16 Volume.RAID_TYPE_RAID50 Please check volume_raid_create_cap_get() returns to get supported all raid types of current hardware RAID card. disks ([lsm.Disks,]) A list of lsm.Disk objects. Free disks used for new RAID group. strip_size (int) The size in bytes of strip. When setting strip_size to Volume.VCR_STRIP_SIZE_DEFAULT, it allow hardware RAID cards to choose their default value. Please use volume_raid_create_cap_get() method to get all supported strip size of current hardware RAID card. The Volume.VCR_STRIP_SIZE_DEFAULT is always supported when lsm.Capabilities.VOLUME_CREATE_RAID is supported. flags (int) Optional. Reserved for future use. Should be set as lsm.Client.FLAG_RSVD. Returns: lsm.Volume The lsm.Volume object for newly created volume. SpecialExceptions: LsmError lsm.ErrorNumber.NO_SUPPORT Method not supported or RAID type not supported. lsm.ErrorNumber.DISK_NOT_FREE Disk is not in Disk.STATUS_FREE status. lsm.ErrorNumber.NOT_FOUND_DISK Disk not found lsm.ErrorNumber.INVALID_ARGUMENT 1. Invalid input argument data. 2. Disks are not from the same system. 3. Disks are not from the same enclosure. 4. Invalid strip_size. 5. Disk count are meet the minimum requirement: RAID1: len(disks) == 2 RAID5: len(disks) >= 3 RAID6: len(disks) >= 4 RAID10: len(disks) % 2 == 0 and len(disks) >= 4 RAID50: len(disks) % 2 == 0 and len(disks) >= 6 RAID60: len(disks) % 2 == 0 and len(disks) >= 8 lsm.ErrorNumber.NAME_CONFLICT Requested name is already be used by other volume. Sample: lsm_client = lsm.Client('sim://') disks = lsm_client.disks() free_disks = [d for d in disks if d.status == Disk.STATUS_FREE] new_vol = lsm_client.volume_raid_create( 'raid0_vol1', Volume.RAID_TYPE_RAID0, free_disks) Capability: lsm.Capabilities.VOLUME_CREATE_RAID Indicate current system support volume_raid_create() method. At least one RAID type should be supported. The strip_size == Volume.VCR_STRIP_SIZE_DEFAULT is supported. """ if len(disks) == 0: raise LsmError(ErrorNumber.INVALID_ARGUMENT, "Illegal input disks argument: no disk included") if raid_type == Volume.RAID_TYPE_RAID1 and len(disks) != 2: raise LsmError( ErrorNumber.INVALID_ARGUMENT, "Illegal input disks argument: RAID 1 only allow 2 disks") if raid_type == Volume.RAID_TYPE_RAID5 and len(disks) < 3: raise LsmError( ErrorNumber.INVALID_ARGUMENT, "Illegal input disks argument: RAID 5 require 3 or more disks") if raid_type == Volume.RAID_TYPE_RAID6 and len(disks) < 4: raise LsmError( ErrorNumber.INVALID_ARGUMENT, "Illegal input disks argument: RAID 6 require 4 or more disks") if raid_type == Volume.RAID_TYPE_RAID10: if len(disks) % 2 or len(disks) < 4: raise LsmError( ErrorNumber.INVALID_ARGUMENT, "Illegal input disks argument: " "RAID 10 require even disks count and 4 or more disks") if raid_type == Volume.RAID_TYPE_RAID50: if len(disks) % 2 or len(disks) < 6: raise LsmError( ErrorNumber.INVALID_ARGUMENT, "Illegal input disks argument: " "RAID 50 require even disks count and 6 or more disks") if raid_type == Volume.RAID_TYPE_RAID60: if len(disks) % 2 or len(disks) < 8: raise LsmError( ErrorNumber.INVALID_ARGUMENT, "Illegal input disks argument: " "RAID 60 require even disks count and 8 or more disks") return self._tp.rpc('volume_raid_create', _del_self(locals())) # Enable the IDENT LED for a volume. # @param self The this pointer # @param volume Volume object to target # @param flags Flags # @returns None on success, else raises LsmError @_return_requires(None) def volume_ident_led_on(self, volume, flags=FLAG_RSVD): """ lsm.Client.volume_ident_led_on(self, volume, flags=lsm.Client.FLAG_RSVD) Version: 1.3 Usage: This method enables the IDENT LED on a volume if supported Parameters: volume (lsm.Volume) An lsm.Volume object. flags (int) Optional. Reserved for future use. Should be set as lsm.Client.FLAG_RSVD. Returns: returns None on success, else raises LsmError on errors. SpecialExceptions: """ return self._tp.rpc('volume_ident_led_on', _del_self(locals())) # Disable the IDENT LED for a volume. # @param self The this pointer # @param volume Volume object to target # @param flags Flags # @returns None on success, else raises LsmError @_return_requires(None) def volume_ident_led_off(self, volume, flags=FLAG_RSVD): """ lsm.Client.volume_ident_led_off(self, volume, flags=lsm.Client.FLAG_RSVD) Version: 1.3 Usage: This method disables the IDENT LED on a volume if supported Parameters: volume (lsm.Volume) An lsm.Volume object. flags (int) Optional. Reserved for future use. Should be set as lsm.Client.FLAG_RSVD. Returns: returns None on success, else raises LsmError on errors. SpecialExceptions: """ return self._tp.rpc('volume_ident_led_off', _del_self(locals())) @_return_requires([Battery]) def batteries(self, search_key=None, search_value=None, flags=FLAG_RSVD): """ lsm.Client.batteries(self, search_key=None, search_value=None, flags=lsm.Client.FLAG_RSVD) Version: 1.3 Usage: Query batteries. When present, super capacitors will also be included. Parameters: search_key (string, optional) The key name for the search. Valid search keys are stored in lsm.Battery.SUPPORTED_SEARCH_KEYS search_value (string, optional) The value of search_key to match. flags (int, optional): Reserved for future use. Should be set as lsm.Client.FLAG_RSVD Returns: [lsm.Battery] lsm.Battery (object) lsm.Battery.id (string) Unique ID for this cache hardware. lsm.Battery.name (string) Human friendly name, might include physical location, model name and etc. lsm.Battery.type (int) The hardware type of cache. Could be one of these values: lsm.Battery.TYPE_CHEMICAL Chemical battery. lsm.Battery.TYPE_CAPACITOR Supper capacitor. lsm.Battery.TYPE_OTHER Vendor specific battery type. lsm.Battery.TYPE_UNKNOWN Unknown type. lsm.Battery.status (int, bitmap) Could be any combination of these values: lsm.Battery.STATUS_OK Battery is fully charged, health and not in use currently. lsm.Battery.STATUS_DISCHARGING Battery is in use. lsm.Battery.STATUS_CHARGING Battery is charging. lsm.Battery.STATUS_LEARNING Battery is calibrating itself by discharging battery and recharging again. lsm.Battery.STATUS_DEGRADED Battery is in degraded mode, need attention. For example, battery is near end of life. lsm.Battery.STATUS_ERROR Battery is having hardware error or end of life. lsm.Battery.STATUS_OTHER Vendor specific status. lsm.Battery.STATUS_UNKNOWN Unknown. lsm.Battery.system_id (string) The id of system which current battery belong to. SpecialExceptions: LsmError ErrorNumber.NO_SUPPORT Capability: lsm.Capabilities.BATTERIES """ _check_search_key(search_key, Battery.SUPPORTED_SEARCH_KEYS) return self._tp.rpc('batteries', _del_self(locals())) @_return_requires([int, int, int, int, int]) def volume_cache_info(self, volume, flags=FLAG_RSVD): """ lsm.Client.volume_cache_info(self, volume, flags=lsm.Client.FLAG_RSVD) Version: 1.3 Usage: Query RAM cache setting and status of specified volume on read and write I/O. Parameters: volume (Lsm.Volume) The lsm.Volume instance. flags (int, optional): Reserved for future use. Should be set as lsm.Client.FLAG_RSVD Returns: [int, int, int, int, int] write_cache_policy (int) The write cache policy. Valid values are: * lsm.Volume.WRITE_CACHE_POLICY_WRITE_BACK The storage system will use write back mode if cache hardware found. * lsm.Volume.WRITE_CACHE_POLICY_AUTO The controller will use write back mode when battery/capacitor is in good health, otherwise, write through mode. * lsm.Volume.WRITE_CACHE_POLICY_WRITE_THROUGH The storage system will use write through mode. * lsm.Volume.WRITE_CACHE_POLICY_UNKNOWN Plugin failed to detect this setting. write_cache_status (int) The status of write cache. Valid values are: * lsm.Volume.WRITE_CACHE_STATUS_WRITE_THROUGH * lsm.Volume.WRITE_CACHE_STATUS_WRITE_BACK * lsm.Volume.WRITE_CACHE_STATUS_UNKNOWN read_cache_policy (int) The policy for read cache. Valid values are: * lsm.Volume.READ_CACHE_POLICY_ENABLED Read cache is enabled, when reading I/O on previous unchanged written I/O or read I/O in cache will be returned to I/O initiator immediately without checking backing store(normally disk). * lsm.Volume.READ_CACHE_POLICY_DISABLED Read cache is disabled. * lsm.Volume.READ_CACHE_POLICY_UNKNOWN Plugin failed to detect the read cache policy. read_cache_status (int) The status of read cache. Valid values are: * lsm.Volume.READ_CACHE_STATUS_ENABLED * lsm.Volume.READ_CACHE_STATUS_DISABLED * lsm.Volume.READ_CACHE_STATUS_UNKNOWN physical_disk_cache (int) Whether physical disk's cache is enabled or not. Please be advised, HDD's physical disk ram cache might be not protected by storage system's battery or capacitor on sudden power loss, you could lose data if a power failure occurs during a write process. For SSD's physical disk cache, please check with the vendor of your hardware RAID card and SSD disk. Valid values are: * lsm.Volume.PHYSICAL_DISK_CACHE_ENABLED Physical disk cache enabled. * lsm.Volume.PHYSICAL_DISK_CACHE_DISABLED Physical disk cache disabled. * lsm.Volume.PHYSICAL_DISK_CACHE_USE_DISK_SETTING Physical disk cache is determined by the disk vendor via physical disks' SCSI caching mode page(0x08 page). It is strongly suggested to change this value to lsm.Volume.PHYSICAL_DISK_CACHE_ENABLED or lsm.Volume.PHYSICAL_DISK_CACHE_DISABLED * lsm.Volume.PHYSICAL_DISK_CACHE_UNKNOWN Plugin failed to detect the physical disk status. SpecialExceptions: LsmError ErrorNumber.NO_SUPPORT ErrorNumber.NOT_FOUND_VOLUME Capability: lsm.Capabilities.VOLUME_CACHE_INFO """ return self._tp.rpc('volume_cache_info', _del_self(locals())) @_return_requires(None) def volume_physical_disk_cache_update(self, volume, pdc, flags=FLAG_RSVD): """ lsm.Client.volume_physical_disk_cache_update(self, volume, pdc, flags=lsm.Client.FLAG_RSVD) Version: 1.3 Usage: Change the setting of RAM physical disk cache of specified volume. On some product(like HPE SmartArray), this action will be effective at system level which means that even you are requesting a change on a specified volume, this change will apply to all other volumes on the same controller(system). Parameters: volume (Lsm.Volume) The lsm.Volume instance. pdc (int) lsm.Volume.PHYSICAL_DISK_CACHE_ENABLED Enable physical disk cache. lsm.Volume.PHYSICAL_DISK_CACHE_DISABLED Disable physical disk cache flags (int, optional): Reserved for future use. Should be set as lsm.Client.FLAG_RSVD Returns: N/A SpecialExceptions: LsmError ErrorNumber.NO_SUPPORT You might also get NO_SUPPORT error when trying to change SSD physical disk cache on MegaRAID. ErrorNumber.NOT_FOUND_VOLUME Capability: lsm.Capabilities.VOLUME_PHYSICAL_DISK_CACHE_SET Allow changing physical disk cache. lsm.Capabilities.VOLUME_PHYSICAL_DISK_CACHE_SET_SYSTEM_LEVEL Indicate that this action will change system settings which are effective on all volumes in this storage system. For example, on HPE SmartArray, the physical disk cache setting is a controller level setting. """ if (pdc != Volume.PHYSICAL_DISK_CACHE_ENABLED) and \ (pdc != Volume.PHYSICAL_DISK_CACHE_DISABLED): raise LsmError( ErrorNumber.INVALID_ARGUMENT, "Argument pdc should be " "Volume.PHYSICAL_DISK_CACHE_ENABLED or " "Volume.PHYSICAL_DISK_CACHE_DISABLED") return self._tp.rpc('volume_physical_disk_cache_update', _del_self(locals())) @_return_requires(None) def volume_write_cache_policy_update(self, volume, wcp, flags=FLAG_RSVD): """ lsm.Client.volume_write_cache_policy_update(self, volume, wcp, flags=lsm.Client.FLAG_RSVD) Version: 1.3 Usage: Change the RAM write cache policy on specified volume. If lsm.Capabilities.VOLUME_WRITE_CACHE_POLICY_SET_IMPACT_READ is supported(e.g. HPE SmartArray), the changes on write cache policy might also impact read cache policy. If lsm.Capabilities.VOLUME_WRITE_CACHE_POLICY_SET_WB_IMPACT_OTHER is supported(e.g. HPE SmartArray), changing write cache policy to write back mode might impact other volumes in the same system. Parameters: volume (Lsm.Volume) The lsm.Volume instance. wcp (int) Could be one of these value: * lsm.Volume.WRITE_CACHE_POLICY_WRITE_BACK Change to write back mode. * lsm.Volume.WRITE_CACHE_POLICY_AUTO Change to auto mode: use write back mode when battery/capacitor is healthy, otherwise use write through. * lsm.Volume.WRITE_CACHE_POLICY_WRITE_THROUGH Change to write through mode. flags (int, optional): Reserved for future use. Should be set as lsm.Client.FLAG_RSVD Returns: N/A SpecialExceptions: LsmError ErrorNumber.NO_SUPPORT ErrorNumber.NOT_FOUND_VOLUME Capability: lsm.Capabilities.VOLUME_WRITE_CACHE_POLICY_SET_WRITE_BACK Allow changing to always mode. lsm.Capabilities.VOLUME_WRITE_CACHE_POLICY_SET_AUTO Allow changing to auto mode. lsm.Capabilities.VOLUME_WRITE_CACHE_POLICY_SET_WRITE_THROUGH Allow changing to disable mode. lsm.Capabilities.VOLUME_WRITE_CACHE_POLICY_SET_IMPACT_READ Indicate this action might impact read cache policy. lsm.Capabilities.VOLUME_WRITE_CACHE_POLICY_SET_WB_IMPACT_OTHER Indicate that changing to write back mode might impact other volumes. For example, on HPE SmartArray, changing to write back mode will change all other volumes with auto write cache policy to write back mode. """ if wcp != Volume.WRITE_CACHE_POLICY_WRITE_BACK and \ wcp != Volume.WRITE_CACHE_POLICY_AUTO and \ wcp != Volume.WRITE_CACHE_POLICY_WRITE_THROUGH: raise LsmError( ErrorNumber.INVALID_ARGUMENT, "Argument wcp should be " "Volume.WRITE_CACHE_POLICY_WRITE_BACK or " "Volume.WRITE_CACHE_POLICY_AUTO or " "Volume.WRITE_CACHE_POLICY_WRITE_THROUGH") return self._tp.rpc('volume_write_cache_policy_update', _del_self(locals())) @_return_requires(None) def volume_read_cache_policy_update(self, volume, rcp, flags=FLAG_RSVD): """ lsm.Client.volume_read_cache_policy_update(self, volume, rcp, flags=lsm.Client.FLAG_RSVD) Version: 1.3 Usage: Change the RAM read cache policy of specified volume. If lsm.Capabilities.VOLUME_READ_CACHE_POLICY_SET_IMPACT_WRITE is supported(like HPE SmartArray), the change on write cache policy might also impact read cache policy. Parameters: volume (Lsm.Volume) The lsm.Volume instance. rcp (int) Could be one of these value: * lsm.Volume.READ_CACHE_POLICY_ENABLED Enable read cache. * lsm.Volume.READ_CACHE_POLICY_DISABLED Disable read cache. flags (int, optional): Reserved for future use. Should be set as lsm.Client.FLAG_RSVD Returns: N/A SpecialExceptions: LsmError ErrorNumber.NO_SUPPORT ErrorNumber.NOT_FOUND_VOLUME Capability: lsm.Capabilities.VOLUME_READ_CACHE_POLICY_SET Allow enabling or disabling read cache policy. lsm.Capabilities.VOLUME_READ_CACHE_POLICY_SET_IMPACT_WRITE Indicate that changing read cache policy might impact write cache policy. For example, on HPE SmartArray, disabling read cache will also change write cache policy to write through. """ if rcp != Volume.READ_CACHE_POLICY_ENABLED and \ rcp != Volume.READ_CACHE_POLICY_DISABLED: raise LsmError( ErrorNumber.INVALID_ARGUMENT, "Argument rcp should be " "Volume.READ_CACHE_POLICY_ENABLED or " "Volume.READ_CACHE_POLICY_DISABLED") return self._tp.rpc('volume_read_cache_policy_update', _del_self(locals()))
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