def ui_command_create(self, name, size, generate_wwn=None, nullio=None):
'''
Creates an RDMCP storage object. I{size} is the size of the ramdisk,
and the optional I{generate_wwn} parameter is a boolean specifying
whether or not we should generate a T10 wwn Serial for the unit (by
default, yes).
SIZE SYNTAX
===========
- If size is an int, it represents a number of bytes.
- If size is a string, the following units can be used:
- B{B} or no unit present for bytes
- B{k}, B{K}, B{kB}, B{KB} for kB (kilobytes)
- B{m}, B{M}, B{mB}, B{MB} for MB (megabytes)
- B{g}, B{G}, B{gB}, B{GB} for GB (gigabytes)
- B{t}, B{T}, B{tB}, B{TB} for TB (terabytes)
'''
self.assert_root()
self.assert_available_so_name(name)
backstore = RDMCPBackstore(self.next_hba_index(), mode='create')
nullio = self.ui_eval_param(nullio, 'bool', False)
try:
so = RDMCPStorageObject(backstore, name, size,
self.prm_gen_wwn(generate_wwn),
nullio=nullio)
except Exception, exception:
backstore.delete()
raise exception
def ui_command_create(self, name, size, nullio=None):
'''
Creates an RDMCP storage object. I{size} is the size of the ramdisk,
and the optional I{nullio} parameter is a boolean specifying
whether or not we should use a stub nullio instead of a real ramdisk.
SIZE SYNTAX
===========
- If size is an int, it represents a number of bytes.
- If size is a string, the following units can be used:
- B{B} or no unit present for bytes
- B{k}, B{K}, B{kB}, B{KB} for kB (kilobytes)
- B{m}, B{M}, B{mB}, B{MB} for MB (megabytes)
- B{g}, B{G}, B{gB}, B{GB} for GB (gigabytes)
- B{t}, B{T}, B{tB}, B{TB} for TB (terabytes)
'''
self.assert_root()
self.assert_available_so_name(name)
backstore = RDMCPBackstore(self.next_hba_index(), mode='create')
nullio = self.ui_eval_param(nullio, 'bool', False)
try:
so = RDMCPStorageObject(backstore, name, size, nullio=nullio)
except Exception, exception:
backstore.delete()
raise exception
def ui_command_create(self, name, size):
'''
Creates an RDMCP storage object. I{size} is the size of the ramdisk.
SIZE SYNTAX
===========
- If size is an int, it represents a number of bytes.
- If size is a string, the following units can be used:
- B{B} or no unit present for bytes
- B{k}, B{K}, B{kB}, B{KB} for kB (kilobytes)
- B{m}, B{M}, B{mB}, B{MB} for MB (megabytes)
- B{g}, B{G}, B{gB}, B{GB} for GB (gigabytes)
- B{t}, B{T}, B{tB}, B{TB} for TB (terabytes)
'''
self.assert_root()
self.assert_available_so_name(name)
backstore = RDMCPBackstore(self.next_hba_index(), mode='create')
try:
so = RDMCPStorageObject(backstore, name, size)
except Exception, exception:
backstore.delete()
raise exception
def apply_create_obj(obj):
'''
Creates an object on the live system.
'''
# TODO Factorize this when stable, merging it with update and delete,
# leveraging rtslib 'any' mode (create if not exist)
# TODO storage
root = get_root()
log.debug("apply_create(%s)" % obj.data)
if obj.key[0] == 'mapped_lun':
acl = obj.parent
if acl.parent.key[0] == 'tpgt':
tpg = acl.parent
target = tpg.parent
else:
tpg = None
target = acl.parent
fabric = target.parent
lio_fabric = FabricModule(fabric.key[1])
lio_target = Target(lio_fabric, wwn=target.key[1], mode='lookup')
if tpg is None:
tpgt = 1
else:
tpgt = int(tpg.key[1])
lio_tpg = TPG(lio_target, tpgt, mode='lookup')
node_wwn = acl.key[1]
lio_acl = NodeACL(lio_tpg, node_wwn, mode='lookup')
mlun = int(obj.key[1])
write_protect = obj_attr(obj, "write_protect")
tpg_lun = int(obj_attr(obj, "target_lun").rpartition(' ')[2])
lio_mlun = MappedLUN(lio_acl, mlun, tpg_lun, write_protect)
apply_group_attrs(obj, lio_mlun)
elif obj.key[0] == 'acl':
if obj.parent.key[0] == 'tpgt':
tpg = obj.parent
target = tpg.parent
else:
tpg = None
target = obj.parent
fabric = target.parent
lio_fabric = FabricModule(fabric.key[1])
lio_target = Target(lio_fabric, wwn=target.key[1], mode='lookup')
if tpg is None:
tpgt = 1
else:
tpgt = int(tpg.key[1])
lio_tpg = TPG(lio_target, tpgt, mode='lookup')
node_wwn = obj.key[1]
lio_acl = NodeACL(lio_tpg, node_wwn)
apply_group_attrs(obj, lio_acl)
elif obj.key[0] == 'portal':
if obj.parent.key[0] == 'tpgt':
tpg = obj.parent
target = tpg.parent
else:
tpg = None
target = obj.parent
fabric = target.parent
lio_fabric = FabricModule(fabric.key[1])
lio_target = Target(lio_fabric, wwn=target.key[1], mode='lookup')
if tpg is None:
tpgt = 1
else:
tpgt = int(tpg.key[1])
lio_tpg = TPG(lio_target, tpgt, mode='lookup')
(address, _, port) = obj.key[1].partition(':')
port = int(port)
lio_portal = NetworkPortal(lio_tpg, address, port)
apply_group_attrs(obj, lio_portal)
elif obj.key[0] == 'lun':
if obj.parent.key[0] == 'tpgt':
tpg = obj.parent
target = tpg.parent
else:
tpg = None
target = obj.parent
fabric = target.parent
lio_fabric = FabricModule(fabric.key[1])
lio_target = Target(lio_fabric, wwn=target.key[1], mode='lookup')
if tpg is None:
tpgt = 1
else:
tpgt = int(tpg.key[1])
lio_tpg = TPG(lio_target, tpgt, mode='lookup')
lun = int(obj.key[1])
(plugin, name) = obj_attr(obj, "backend")
# TODO move that to a separate function, use for disk too
matching_lio_so = [
so for so in root.storage_objects
if so.backstore.plugin == plugin and so.name == name
]
if len(matching_lio_so) > 1:
raise ConfigError("Detected unsupported configfs storage objects "
"allocation schema for storage object '%s'" %
obj.path_str)
elif len(matching_lio_so) == 0:
raise ConfigError(
"Could not find storage object '%s %s' for '%s'" %
(plugin, name, obj.path_str))
else:
lio_so = matching_lio_so[0]
lio_lun = LUN(lio_tpg, lun, lio_so)
apply_group_attrs(obj, lio_lun)
elif obj.key[0] == 'tpgt':
target = obj.parent
fabric = target.parent
has_enable = len(obj.search([("enable", ".*")])) != 0
if has_enable:
enable = obj_attr(obj, "enable")
lio_fabric = FabricModule(fabric.key[1])
lio_target = Target(lio_fabric, wwn=target.key[1], mode='lookup')
tpgt = int(obj.key[1])
try:
nexus_wwn = obj_attr(obj, "nexus_wwn")
lio_tpg = TPG(lio_target, tpgt, nexus_wwn=nexus_wwn)
except ConfigError:
lio_tpg = TPG(lio_target, tpgt)
if has_enable:
lio_tpg.enable = enable
apply_group_attrs(obj, lio_tpg)
elif obj.key[0] == 'target':
fabric = obj.parent
wwn = obj.key[1]
lio_fabric = FabricModule(fabric.key[1])
lio_target = Target(lio_fabric, wwn=wwn)
apply_group_attrs(obj, lio_target)
if not lio_target.has_feature("tpgts"):
try:
nexus_wwn = obj_attr(obj, "nexus_wwn")
lio_tpg = TPG(lio_target, 1, nexus_wwn=nexus_wwn)
except ConfigError:
lio_tpg = TPG(lio_target, 1)
if len(obj.search([("enable", ".*")])) != 0:
lio_tpg.enable = True
elif obj.key[0] == 'fabric':
lio_fabric = FabricModule(obj.key[1])
apply_group_attrs(obj, lio_fabric)
elif obj.key[0] == 'disk':
plugin = obj.parent.key[1]
name = obj.key[1]
idx = max([0] +
[b.index for b in root.backstores if b.plugin == plugin]) + 1
if plugin == 'fileio':
dev = obj_attr(obj, "path")
size = obj_attr(obj, "size")
try:
wwn = obj_attr(obj, "wwn")
except ConfigError:
wwn = None
buffered = obj_attr(obj, "buffered")
lio_bs = FileIOBackstore(idx)
lio_so = lio_bs.storage_object(name, dev, size, wwn, buffered)
apply_group_attrs(obj, lio_so)
elif plugin == 'iblock':
# TODO Add policy for iblock
lio_bs = IBlockBackstore(idx)
dev = obj_attr(obj, "path")
wwn = obj_attr(obj, "wwn")
lio_so = lio_bs.storage_object(name, dev, wwn)
apply_group_attrs(obj, lio_so)
elif plugin == 'pscsi':
# TODO Add policy for pscsi
lio_bs = PSCSIBackstore(idx)
dev = obj_attr(obj, "path")
lio_so = lio_bs.storage_object(name, dev)
apply_group_attrs(obj, lio_so)
elif plugin == 'rd_mcp':
# TODO Add policy for rd_mcp
lio_bs = RDMCPBackstore(idx)
size = obj_attr(obj, "size")
wwn = obj_attr(obj, "wwn")
nullio = obj_attr(obj, "nullio")
lio_so = lio_bs.storage_object(name, size, wwn, nullio)
apply_group_attrs(obj, lio_so)
else:
raise ConfigError("Unknown backend '%s' for backstore '%s'" %
(plugin, obj))
matching_lio_so = [
so for so in root.storage_objects
if so.backstore.plugin == plugin and so.name == name
]
if len(matching_lio_so) > 1:
raise ConfigError("Detected unsupported configfs storage objects "
"allocation schema for '%s'" % obj.path_str)
elif len(matching_lio_so) == 0:
raise ConfigError("Could not find backstore '%s'" % obj.path_str)
else:
lio_so = matching_lio_so[0]
def ui_command_create(self, backstore_plugin):
'''
Creates a new backstore, using the chosen I{backstore_plugin}. More
than one backstores using the same I{backstore_plugin} can co-exist.
They will be identified by incremental index numbers, starting from 0.
AVAILABLE BACKSTORE PLUGINS
===========================
B{iblock}
---------
This I{backstore_plugin} provides I{SPC-4}, along with I{ALUA} and
I{Persistent Reservations} emulation on top of Linux BLOCK devices:
B{any block device} that appears in /sys/block.
B{pscsi}
--------
Provides pass-through for Linux physical SCSI devices. It can be used
with any storage object that does B{direct pass-through} of SCSI
commands without SCSI emulation. This assumes an underlying SCSI
device that appears with lsscsi in /proc/scsi/scsi, such as a SAS hard
drive, such as any SCSI device. The Linux kernel code for device SCSI
drivers resides in linux/drivers/scsi. SCSI-3 and higher is supported
with this subsystem, but only for control CDBs capable by the device
firmware.
B{fileio}
---------
This I{backstore_plugin} provides I{SPC-4}, along with I{ALUA} and
I{Persistent Reservations} emulation on top of Linux VFS devices:
B{any file on a mounted filesystem}. It may be backed by a file or an
underlying real block device. FILEIO is using struct file to serve
block I/O with various methods (synchronous or asynchronous) and
(buffered or direct).
B{rd_mcp}
--------
This I{backstore_plugin} uses a ramdisk with a separate
mapping using memory copy. Typically used for bandwidth
testing.
EXAMPLE
=======
B{create iblock}
----------------
Creates a new backstore, using the B{iblock} I{backstore_plugin}.
'''
self.assert_root()
self.shell.log.debug("%r" % [(backstore.plugin, backstore.index)
for backstore in RTSRoot().backstores])
indexes = [
backstore.index for backstore in RTSRoot().backstores
if backstore.plugin == backstore_plugin
]
self.shell.log.debug("Existing %s backstore indexes: %r" %
(backstore_plugin, indexes))
for index in range(1048576):
if index not in indexes:
backstore_index = index
break
if backstore_index is None:
self.shell.log.error("Cannot find an available backstore index.")
return
else:
self.shell.log.info("First available %s backstore index is %d." %
(backstore_plugin, backstore_index))
if backstore_plugin == 'pscsi':
backstore = PSCSIBackstore(backstore_index, mode='create')
return self.new_node(UIPSCSIBackstoreLegacy(backstore, self))
elif backstore_plugin == 'rd_mcp':
backstore = RDMCPBackstore(backstore_index, mode='create')
return self.new_node(UIRDMCPBackstoreLegacy(backstore, self))
elif backstore_plugin == 'fileio':
backstore = FileIOBackstore(backstore_index, mode='create')
return self.new_node(UIFileIOBackstoreLegacy(backstore, self))
elif backstore_plugin == 'iblock':
backstore = IBlockBackstore(backstore_index, mode='create')
return self.new_node(UIIBlockBackstoreLegacy(backstore, self))
else:
self.shell.log.error("Invalid backstore plugin %s" %
backstore_plugin)
return
self.shell.log.info("Created new backstore %s" % backstore.name)