File rtslib-refactor-to-python3.patch of Package python-rtslib-fb

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File rtslib-refactor-to-python3.patch of Package python-rtslib-fb (Revision 2b58b85f136e69cc04d20d548240213c)

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From dc1bfe302a461daa96515d685abaa8188ec1586b Mon Sep 17 00:00:00 2001
From: Martin Hoyer <mhoyer@redhat.com>
Date: Thu, 16 May 2024 17:24:17 +0200
Subject: [PATCH] Refactor code to Python>=3.9 to pass pyupgrade

---
 rtslib/alua.py    | 41 ++++++++++++-----------
 rtslib/fabric.py  | 38 ++++++++++------------
 rtslib/node.py    |  2 +-
 rtslib/root.py    | 45 ++++++++++---------------
 rtslib/target.py  | 83 +++++++++++++++++++++++------------------------
 rtslib/tcm.py     | 56 +++++++++++++++-----------------
 rtslib/utils.py   | 12 +++----
 scripts/targetctl |  3 +-
 8 files changed, 130 insertions(+), 150 deletions(-)

Index: python-rtslib-fb-v2.1.76/rtslib/alua.py
===================================================================
--- python-rtslib-fb-v2.1.76.orig/rtslib/alua.py
+++ python-rtslib-fb-v2.1.76/rtslib/alua.py
@@ -19,7 +19,6 @@ a copy of the License at
 
 from .node import CFSNode
 from .utils import RTSLibError, RTSLibALUANotSupported, fread, fwrite
-import six
 
 alua_rw_params = ['alua_access_state', 'alua_access_status',
                   'alua_write_metadata', 'alua_access_type', 'preferred',
@@ -54,7 +53,7 @@ class ALUATargetPortGroup(CFSNode):
         if tag is not None and (tag > 65535 or tag < 1):
             raise RTSLibError("The TPG Tag must be between 1 and 65535")
 
-        super(ALUATargetPortGroup, self).__init__()
+        super().__init__()
         self.name = name
         self.storage_object = storage_object
 
@@ -68,7 +67,7 @@ class ALUATargetPortGroup(CFSNode):
 
             try:
                 fwrite("%s/tg_pt_gp_id" % self._path, tag)
-            except IOError as msg:
+            except OSError as msg:
                 self.delete()
                 raise RTSLibError("Cannot set id to %d: %s" % (tag, str(msg)))
         else:
@@ -90,7 +89,7 @@ class ALUATargetPortGroup(CFSNode):
             raise RTSLibError("Can not delete default_tg_pt_gp")
 
         # This will reset the ALUA tpg to default_tg_pt_gp
-        super(ALUATargetPortGroup, self).delete()
+        super().delete()
 
     def _get_alua_access_state(self):
         self._check_self()
@@ -102,7 +101,7 @@ class ALUATargetPortGroup(CFSNode):
         path = "%s/alua_access_state" % self.path
         try:
             fwrite(path, str(int(newstate)))
-        except IOError as e:
+        except OSError as e:
             raise RTSLibError("Cannot change ALUA state: %s" % e)
 
     def _get_alua_access_status(self):
@@ -116,7 +115,7 @@ class ALUATargetPortGroup(CFSNode):
         path = "%s/alua_access_status" % self.path
         try:
             fwrite(path, str(int(newstatus)))
-        except IOError as e:
+        except OSError as e:
             raise RTSLibError("Cannot change ALUA status: %s" % e)
 
     def _get_alua_access_type(self):
@@ -130,7 +129,7 @@ class ALUATargetPortGroup(CFSNode):
         path = "%s/alua_access_type" % self.path
         try:
             fwrite(path, str(int(access_type)))
-        except IOError as e:
+        except OSError as e:
             raise RTSLibError("Cannot change ALUA access type: %s" % e)
 
     def _get_preferred(self):
@@ -143,7 +142,7 @@ class ALUATargetPortGroup(CFSNode):
         path = "%s/preferred" % self.path
         try:
             fwrite(path, str(int(pref)))
-        except IOError as e:
+        except OSError as e:
             raise RTSLibError("Cannot set preferred: %s" % e)
 
     def _get_alua_write_metadata(self):
@@ -156,7 +155,7 @@ class ALUATargetPortGroup(CFSNode):
         path = "%s/alua_write_metadata" % self.path
         try:
             fwrite(path, str(int(pref)))
-        except IOError as e:
+        except OSError as e:
             raise RTSLibError("Cannot set alua_write_metadata: %s" % e)
 
     def _get_alua_support_active_nonoptimized(self):
@@ -169,7 +168,7 @@ class ALUATargetPortGroup(CFSNode):
         path = "%s/alua_support_active_nonoptimized" % self.path
         try:
             fwrite(path, str(int(enabled)))
-        except IOError as e:
+        except OSError as e:
             raise RTSLibError("Cannot set alua_support_active_nonoptimized: %s" % e)
 
     def _get_alua_support_active_optimized(self):
@@ -182,7 +181,7 @@ class ALUATargetPortGroup(CFSNode):
         path = "%s/alua_support_active_optimized" % self.path
         try:
             fwrite(path, str(int(enabled)))
-        except IOError as e:
+        except OSError as e:
             raise RTSLibError("Cannot set alua_support_active_optimized: %s" % e)
 
     def _get_alua_support_offline(self):
@@ -195,7 +194,7 @@ class ALUATargetPortGroup(CFSNode):
         path = "%s/alua_support_offline" % self.path
         try:
             fwrite(path, str(int(enabled)))
-        except IOError as e:
+        except OSError as e:
             raise RTSLibError("Cannot set alua_support_offline: %s" % e)
 
     def _get_alua_support_unavailable(self):
@@ -208,7 +207,7 @@ class ALUATargetPortGroup(CFSNode):
         path = "%s/alua_support_unavailable" % self.path
         try:
             fwrite(path, str(int(enabled)))
-        except IOError as e:
+        except OSError as e:
             raise RTSLibError("Cannot set alua_support_unavailable: %s" % e)
 
     def _get_alua_support_standby(self):
@@ -221,7 +220,7 @@ class ALUATargetPortGroup(CFSNode):
         path = "%s/alua_support_standby" % self.path
         try:
             fwrite(path, str(int(enabled)))
-        except IOError as e:
+        except OSError as e:
             raise RTSLibError("Cannot set alua_support_standby: %s" % e)
 
     def _get_alua_support_transitioning(self):
@@ -234,7 +233,7 @@ class ALUATargetPortGroup(CFSNode):
         path = "%s/alua_support_transitioning" % self.path
         try:
             fwrite(path, str(int(enabled)))
-        except IOError as e:
+        except OSError as e:
             raise RTSLibError("Cannot set alua_support_transitioning: %s" % e)
 
     def _get_alua_support_lba_dependent(self):
@@ -272,7 +271,7 @@ class ALUATargetPortGroup(CFSNode):
         path = "%s/trans_delay_msecs" % self.path
         try:
             fwrite(path, str(int(secs)))
-        except IOError as e:
+        except OSError as e:
             raise RTSLibError("Cannot set trans_delay_msecs: %s" % e)
 
     def _get_implicit_trans_secs(self):
@@ -285,7 +284,7 @@ class ALUATargetPortGroup(CFSNode):
         path = "%s/implicit_trans_secs" % self.path
         try:
             fwrite(path, str(int(secs)))
-        except IOError as e:
+        except OSError as e:
             raise RTSLibError("Cannot set implicit_trans_secs: %s" % e)
 
     def _get_nonop_delay_msecs(self):
@@ -298,11 +297,11 @@ class ALUATargetPortGroup(CFSNode):
         path = "%s/nonop_delay_msecs" % self.path
         try:
             fwrite(path, str(int(delay)))
-        except IOError as e:
+        except OSError as e:
             raise RTSLibError("Cannot set nonop_delay_msecs: %s" % e)
 
     def dump(self):
-        d = super(ALUATargetPortGroup, self).dump()
+        d = super().dump()
         d['name'] = self.name
         d['tg_pt_gp_id'] = self.tg_pt_gp_id
         for param in alua_rw_params:
@@ -394,7 +393,7 @@ class ALUATargetPortGroup(CFSNode):
             return
 
         alua_tpg_obj = cls(storage_obj, name, alua_tpg['tg_pt_gp_id'])
-        for param, value in six.iteritems(alua_tpg):
+        for param, value in alua_tpg.items():
             if param != 'name' and param != 'tg_pt_gp_id':
                 try:
                     setattr(alua_tpg_obj, param, value)
Index: python-rtslib-fb-v2.1.76/rtslib/fabric.py
===================================================================
--- python-rtslib-fb-v2.1.76.orig/rtslib/fabric.py
+++ python-rtslib-fb-v2.1.76/rtslib/fabric.py
@@ -108,9 +108,7 @@ Example: self._path = "%s/%s" % (self.co
 '''
 
 from functools import partial
-from glob import iglob as glob
-import os
-import six
+from pathlib import Path
 
 from .node import CFSNode
 from .utils import fread, fwrite, normalize_wwn, colonize
@@ -146,7 +144,7 @@ class _BaseFabricModule(CFSNode):
         @param name: the name of the FabricModule object.
         @type name: str
         '''
-        super(_BaseFabricModule, self).__init__()
+        super().__init__()
         self.name = name
         self.spec_file = "N/A"
         self._path = "%s/%s" % (self.configfs_dir, self.name)
@@ -164,7 +162,7 @@ class _BaseFabricModule(CFSNode):
             except RTSLibError:
                 modprobe(self.kernel_module)
                 self._create_in_cfs_ine('any')
-        super(_BaseFabricModule, self)._check_self()
+        super()._check_self()
 
     def has_feature(self, feature):
         # Handle a renamed feature
@@ -324,7 +322,7 @@ class _BaseFabricModule(CFSNode):
         '''
         Setup fabricmodule with settings from fm dict.
         '''
-        for name, value in six.iteritems(fm):
+        for name, value in fm.items():
             if name != 'name':
                 try:
                     setattr(self, name, value)
@@ -332,7 +330,7 @@ class _BaseFabricModule(CFSNode):
                     err_func("Could not set fabric %s attribute '%s'" % (fm['name'], name))
 
     def dump(self):
-        d = super(_BaseFabricModule, self).dump()
+        d = super().dump()
         d['name'] = self.name
         if self.has_feature("discovery_auth"):
             for attr in ("userid", "password", "mutual_userid", "mutual_password"):
@@ -346,13 +344,13 @@ class _BaseFabricModule(CFSNode):
 class ISCSIFabricModule(_BaseFabricModule):
 
     def __init__(self):
-        super(ISCSIFabricModule, self).__init__('iscsi')
+        super().__init__('iscsi')
         self.wwn_types = ('iqn', 'naa', 'eui')
 
 
 class LoopbackFabricModule(_BaseFabricModule):
     def __init__(self):
-        super(LoopbackFabricModule, self).__init__('loopback')
+        super().__init__('loopback')
         self.features = ("nexus",)
         self.wwn_types = ('naa',)
         self.kernel_module = "tcm_loop"
@@ -360,7 +358,7 @@ class LoopbackFabricModule(_BaseFabricMo
 
 class SBPFabricModule(_BaseFabricModule):
     def __init__(self):
-        super(SBPFabricModule, self).__init__('sbp')
+        super().__init__('sbp')
         self.features = ()
         self.wwn_types = ('eui',)
         self.kernel_module = "sbp_target"
@@ -383,7 +381,7 @@ class SBPFabricModule(_BaseFabricModule)
 
 class Qla2xxxFabricModule(_BaseFabricModule):
     def __init__(self):
-        super(Qla2xxxFabricModule, self).__init__('qla2xxx')
+        super().__init__('qla2xxx')
         self.features = ("acls",)
         self.wwn_types = ('naa',)
         self.kernel_module = "tcm_qla2xxx"
@@ -408,7 +406,7 @@ class Qla2xxxFabricModule(_BaseFabricMod
 
 class EfctFabricModule(_BaseFabricModule):
     def __init__(self):
-        super(EfctFabricModule, self).__init__('efct')
+        super().__init__('efct')
         self.features = ("acls",)
         self.wwn_types = ('naa',)
         self.kernel_module = "efct"
@@ -433,7 +431,7 @@ class EfctFabricModule(_BaseFabricModule
 
 class SRPTFabricModule(_BaseFabricModule):
     def __init__(self):
-        super(SRPTFabricModule, self).__init__('srpt')
+        super().__init__('srpt')
         self.features = ("acls",)
         self.wwn_types = ('ib',)
         self.kernel_module = "ib_srpt"
@@ -453,7 +451,7 @@ class SRPTFabricModule(_BaseFabricModule
 
 class FCoEFabricModule(_BaseFabricModule):
     def __init__(self):
-        super(FCoEFabricModule, self).__init__('tcm_fc')
+        super().__init__('tcm_fc')
 
         self.features = ("acls",)
         self.kernel_module = "tcm_fc"
@@ -480,7 +478,7 @@ class FCoEFabricModule(_BaseFabricModule
 
 class USBGadgetFabricModule(_BaseFabricModule):
     def __init__(self):
-        super(USBGadgetFabricModule, self).__init__('usb_gadget')
+        super().__init__('usb_gadget')
         self.features = ("nexus",)
         self.wwn_types = ('naa',)
         self.kernel_module = "tcm_usb_gadget"
@@ -488,14 +486,14 @@ class USBGadgetFabricModule(_BaseFabricM
 
 class VhostFabricModule(_BaseFabricModule):
     def __init__(self):
-        super(VhostFabricModule, self).__init__('vhost')
+        super.__init__('vhost')
         self.features = ("nexus", "acls", "tpgts")
         self.wwn_types = ('naa',)
         self.kernel_module = "tcm_vhost"
 
 class XenPvScsiFabricModule(_BaseFabricModule):
     def __init__(self):
-        super(XenPvScsiFabricModule, self).__init__('xen-pvscsi')
+        super.__init__('xen-pvscsi')
         self._path = "%s/%s" % (self.configfs_dir, 'xen-pvscsi')
         self.features = ("nexus", "tpgts")
         self.wwn_types = ('naa',)
@@ -504,7 +502,7 @@ class XenPvScsiFabricModule(_BaseFabricM
 
 class IbmvscsisFabricModule(_BaseFabricModule):
     def __init__(self):
-        super(IbmvscsisFabricModule, self).__init__('ibmvscsis')
+        super().__init__('ibmvscsis')
         self.features = ()
         self.kernel_module = "ibmvscsis"
 
@@ -533,14 +531,14 @@ fabric_modules = {
 # Maintain compatibility with existing FabricModule(fabricname) usage
 # e.g. FabricModule('iscsi') returns an ISCSIFabricModule
 #
-class FabricModule(object):
+class FabricModule:
 
     def __new__(cls, name):
         return fabric_modules[name]()
 
     @classmethod
     def all(cls):
-        for mod in six.itervalues(fabric_modules):
+        for mod in fabric_modules.values():
             yield mod()
 
     @classmethod
Index: python-rtslib-fb-v2.1.76/rtslib/node.py
===================================================================
--- python-rtslib-fb-v2.1.76.orig/rtslib/node.py
+++ python-rtslib-fb-v2.1.76/rtslib/node.py
@@ -24,7 +24,7 @@ import errno
 from .utils import fread, fwrite, RTSLibError, RTSLibNotInCFS
 
 
-class CFSNode(object):
+class CFSNode:
 
     # Where is the configfs base LIO directory ?
     configfs_dir = '/sys/kernel/config/target'
Index: python-rtslib-fb-v2.1.76/rtslib/root.py
===================================================================
--- python-rtslib-fb-v2.1.76.orig/rtslib/root.py
+++ python-rtslib-fb-v2.1.76/rtslib/root.py
@@ -72,7 +72,7 @@ class RTSRoot(CFSNode):
         Instantiate an RTSRoot object. Basically checks for configfs setup and
         base kernel modules (tcm)
         '''
-        super(RTSRoot, self).__init__()
+        super().__init__()
         try:
             mount_configfs()
         except RTSLibError:
@@ -90,61 +90,51 @@ class RTSRoot(CFSNode):
     def _list_targets(self):
         self._check_self()
         for fabric_module in self.fabric_modules:
-            for target in fabric_module.targets:
-                yield target
+            yield from fabric_module.targets
 
     def _list_storage_objects(self):
         self._check_self()
-        for so in StorageObject.all():
-            yield so
+        yield from StorageObject.all()
 
     def _list_alua_tpgs(self):
         self._check_self()
         for so in self.storage_objects:
-            for a in so.alua_tpgs:
-                yield a
+            yield from so.alua_tpgs
 
     def _list_tpgs(self):
         self._check_self()
         for t in self.targets:
-            for tpg in t.tpgs:
-                yield tpg
+            yield from t.tpgs
 
     def _list_node_acls(self):
         self._check_self()
         for t in self.tpgs:
-            for node_acl in t.node_acls:
-                yield node_acl
+            yield from t.node_acls
 
     def _list_node_acl_groups(self):
         self._check_self()
         for t in self.tpgs:
-            for nag in t.node_acl_groups:
-                yield nag
+            yield from t.node_acl_groups
 
     def _list_mapped_luns(self):
         self._check_self()
         for na in self.node_acls:
-            for mlun in na.mapped_luns:
-                yield mlun
+            yield from na.mapped_luns
 
     def _list_mapped_lun_groups(self):
         self._check_self()
         for nag in self.node_acl_groups:
-            for mlg in nag.mapped_lun_groups:
-                yield mlg
+            yield from nag.mapped_lun_groups
 
     def _list_network_portals(self):
         self._check_self()
         for t in self.tpgs:
-            for p in t.network_portals:
-                yield p
+            yield from t.network_portals
 
     def _list_luns(self):
         self._check_self()
         for t in self.tpgs:
-            for lun in t.luns:
-                yield lun
+            yield from t.luns
 
     def _list_sessions(self):
         self._check_self()
@@ -154,8 +144,7 @@ class RTSRoot(CFSNode):
 
     def _list_fabric_modules(self):
         self._check_self()
-        for mod in FabricModule.all():
-            yield mod
+        yield from FabricModule.all()
 
     def __str__(self):
         return "rtslib"
@@ -195,13 +184,13 @@ class RTSRoot(CFSNode):
         current = self.dump()
 
         try:
-            with open(save_file, "r") as f:
+            with open(save_file) as f:
                 saveconf = json.loads(f.read())
-        except IOError as e:
+        except OSError as e:
             if e.errno == errno.ENOENT:
                 saveconf = {'storage_objects': [], 'targets': []}
             else:
-                raise ExecutionError("Could not open %s" % save_file)
+                raise OSError("Could not open %s" % save_file)
 
         fetch_cur_so = False
         fetch_cur_tg = False
@@ -276,7 +265,7 @@ class RTSRoot(CFSNode):
         config, suitable for serialization/deserialization, and then
         handing to restore().
         '''
-        d = super(RTSRoot, self).dump()
+        d = super().dump()
         d['storage_objects'] = [so.dump() for so in self.storage_objects]
         d['targets'] = [t.dump() for t in self.targets]
         d['fabric_modules'] = [f.dump() for f in self.fabric_modules
@@ -503,7 +492,7 @@ class RTSRoot(CFSNode):
         if not restore_file:
             restore_file = default_save_file
 
-        with open(restore_file, "r") as f:
+        with open(restore_file) as f:
             config = json.loads(f.read())
             return self.restore(config, target, storage_object,
                                 clear_existing=clear_existing,
Index: python-rtslib-fb-v2.1.76/rtslib/target.py
===================================================================
--- python-rtslib-fb-v2.1.76.orig/rtslib/target.py
+++ python-rtslib-fb-v2.1.76/rtslib/target.py
@@ -21,7 +21,6 @@ under the License.
 import os
 from glob import iglob as glob
 from functools import partial
-from six.moves import range
 import uuid
 
 from .node import CFSNode
@@ -31,8 +30,6 @@ from .utils import dict_remove, set_attr
 from .utils import _get_auth_attr, _set_auth_attr
 from . import tcm
 
-import six
-
 auth_params = ('userid', 'password', 'mutual_userid', 'mutual_password')
 
 class Target(CFSNode):
@@ -63,7 +60,7 @@ class Target(CFSNode):
         @return: A Target object.
         '''
 
-        super(Target, self).__init__()
+        super().__init__()
         self.fabric_module = fabric_module
 
         fabric_module._check_self()
@@ -107,7 +104,7 @@ class Target(CFSNode):
         self._check_self()
         for tpg in self.tpgs:
             tpg.delete()
-        super(Target, self).delete()
+        super().delete()
 
     tpgs = property(_list_tpgs, doc="Get the list of TPG for the Target.")
 
@@ -133,7 +130,7 @@ class Target(CFSNode):
             TPG.setup(t_obj, tpg, err_func)
 
     def dump(self):
-        d = super(Target, self).dump()
+        d = super().dump()
         d['wwn'] = self.wwn
         d['fabric'] = self.fabric_module.name
         d['tpgs'] = [tpg.dump() for tpg in self.tpgs]
@@ -169,7 +166,7 @@ class TPG(CFSNode):
         @return: A TPG object.
         '''
 
-        super(TPG, self).__init__()
+        super().__init__()
 
         if tag is None:
             tags = [tpg.tag for tpg in parent_target.tpgs]
@@ -241,7 +238,7 @@ class TPG(CFSNode):
         if os.path.isfile(path) and (boolean != self._get_enable()):
             try:
                 fwrite(path, str(int(boolean)))
-            except IOError as e:
+            except OSError as e:
                 raise RTSLibError("Cannot change enable state: %s" % e)
 
     def _get_nexus(self):
@@ -252,7 +249,7 @@ class TPG(CFSNode):
         if self.has_feature('nexus'):
             try:
                 nexus_wwn = fread("%s/nexus" % self.path)
-            except IOError:
+            except OSError:
                 nexus_wwn = ''
             return nexus_wwn
         else:
@@ -344,7 +341,7 @@ class TPG(CFSNode):
             lun.delete()
         for portal in self.network_portals:
             portal.delete()
-        super(TPG, self).delete()
+        super().delete()
 
     def node_acl(self, node_wwn, mode='any'):
         '''
@@ -435,7 +432,7 @@ class TPG(CFSNode):
         tpg_obj.enable = tpg.get('enable', True)
         dict_remove(tpg, ('luns', 'portals', 'node_acls', 'tag',
                           'attributes', 'parameters', 'enable'))
-        for name, value in six.iteritems(tpg):
+        for name, value in tpg.items():
             if value:
                 try:
                     setattr(tpg_obj, name, value)
@@ -444,7 +441,7 @@ class TPG(CFSNode):
                              (tpg_obj.tag, name))
 
     def dump(self):
-        d = super(TPG, self).dump()
+        d = super().dump()
         d['tag'] = self.tag
         d['enable'] = self.enable
         d['luns'] = [lun.dump() for lun in self.luns]
@@ -495,7 +492,7 @@ class LUN(CFSNode):
         @type alias: string
         @return: A LUN object.
         '''
-        super(LUN, self).__init__()
+        super().__init__()
 
         if isinstance(parent_tpg, TPG):
             self._parent_tpg = parent_tpg
@@ -603,7 +600,7 @@ class LUN(CFSNode):
                 return None
             group_line = info.splitlines()[0]
             return group_line.split(':')[1].strip()
-        except IOError as e:
+        except OSError as e:
             return None
 
     def _set_alua_tg_pt_gp_name(self, group_name):
@@ -615,7 +612,7 @@ class LUN(CFSNode):
         path = "%s/alua_tg_pt_gp" % self.path
         try:
             fwrite(path, group_name)
-        except IOError as e:
+        except OSError as e:
             return -1
 
         return 0
@@ -641,7 +638,7 @@ class LUN(CFSNode):
             if os.path.islink("%s/%s" % (self.path, link)):
                 os.unlink("%s/%s" % (self.path, link))
 
-        super(LUN, self).delete()
+        super().delete()
 
     parent_tpg = property(_get_parent_tpg,
             doc="Get the parent TPG object.")
@@ -689,7 +686,7 @@ class LUN(CFSNode):
             pass
 
     def dump(self):
-        d = super(LUN, self).dump()
+        d = super().dump()
         d['storage_object'] = "/backstores/%s/%s" % \
             (self.storage_object.plugin,  self.storage_object.name)
         d['index'] = self.lun
@@ -729,7 +726,7 @@ class NetworkPortal(CFSNode):
         @type mode:string
         @return: A NetworkPortal object.
         '''
-        super(NetworkPortal, self).__init__()
+        super().__init__()
 
         self._ip_address = str(ip_address)
 
@@ -763,14 +760,14 @@ class NetworkPortal(CFSNode):
     def _get_iser(self):
         try:
             return bool(int(fread("%s/iser" % self.path)))
-        except IOError:
+        except OSError:
             return False
 
     def _set_iser(self, boolean):
         path = "%s/iser" % self.path
         try:
             fwrite(path, str(int(boolean)))
-        except IOError:
+        except OSError:
             # b/w compat: don't complain if iser entry is missing
             if os.path.isfile(path):
                 raise RTSLibError("Cannot change iser")
@@ -779,14 +776,14 @@ class NetworkPortal(CFSNode):
         try:
             # only offload at the moment is cxgbit
             return bool(int(fread("%s/cxgbit" % self.path)))
-        except IOError:
+        except OSError:
             return False
 
     def _set_offload(self, boolean):
         path = "%s/cxgbit" % self.path
         try:
             fwrite(path, str(int(boolean)))
-        except IOError:
+        except OSError:
             # b/w compat: don't complain if cxgbit entry is missing
             if os.path.isfile(path):
                 raise RTSLibError("Cannot change offload")
@@ -796,7 +793,7 @@ class NetworkPortal(CFSNode):
     def delete(self):
         self.iser = False
         self.offload = False
-        super(NetworkPortal, self).delete()
+        super().delete()
 
     parent_tpg = property(_get_parent_tpg,
             doc="Get the parent TPG object.")
@@ -829,7 +826,7 @@ class NetworkPortal(CFSNode):
                      (p['ip_address'], p['port'], e))
 
     def dump(self):
-        d = super(NetworkPortal, self).dump()
+        d = super().dump()
         d['port'] = self.port
         d['ip_address'] = self.ip_address
         d['iser'] = self.iser
@@ -864,7 +861,7 @@ class NodeACL(CFSNode):
         @return: A NodeACL object.
         '''
 
-        super(NodeACL, self).__init__()
+        super().__init__()
 
         if isinstance(parent_tpg, TPG):
             self._parent_tpg = parent_tpg
@@ -892,7 +889,7 @@ class NodeACL(CFSNode):
         path = "%s/cmdsn_depth" % self.path
         try:
             fwrite(path, "%s" % depth)
-        except IOError as msg:
+        except OSError as msg:
             msg = msg[1]
             raise RTSLibError("Cannot set tcq_depth: %s" % str(msg))
 
@@ -903,11 +900,11 @@ class NodeACL(CFSNode):
             if tag:
                 return tag
             return None
-        except IOError:
+        except OSError:
             return None
 
     def _set_tag(self, tag_str):
-        with ignored(IOError):
+        with ignored(OSError):
             if tag_str is None:
                 fwrite("%s/tag" % self.path, 'NULL')
             else:
@@ -922,7 +919,7 @@ class NodeACL(CFSNode):
     def _get_session(self):
         try:
             lines = fread("%s/info" % self.path).splitlines()
-        except IOError:
+        except OSError:
             return None
 
         if lines[0].startswith("No active"):
@@ -967,7 +964,7 @@ class NodeACL(CFSNode):
         self._check_self()
         for mapped_lun in self.mapped_luns:
             mapped_lun.delete()
-        super(NodeACL, self).delete()
+        super().delete()
 
     def mapped_lun(self, mapped_lun, tpg_lun=None, write_protect=None):
         '''
@@ -1029,7 +1026,7 @@ class NodeACL(CFSNode):
             MappedLUN.setup(tpg_obj, acl_obj, mlun, err_func)
 
         dict_remove(acl, ('attributes', 'mapped_luns', 'node_wwn'))
-        for name, value in six.iteritems(acl):
+        for name, value in acl.items():
             if value:
                 try:
                     setattr(acl_obj, name, value)
@@ -1038,7 +1035,7 @@ class NodeACL(CFSNode):
                              (acl['node_wwn'], name))
 
     def dump(self):
-        d = super(NodeACL, self).dump()
+        d = super().dump()
         d['node_wwn'] = self.node_wwn
         d['mapped_luns'] = [lun.dump() for lun in self.mapped_luns]
         if self.tag:
@@ -1091,7 +1088,7 @@ class MappedLUN(CFSNode):
         @type write_protect: bool
         '''
 
-        super(MappedLUN, self).__init__()
+        super().__init__()
 
         if not isinstance(parent_nodeacl, NodeACL):
             raise RTSLibError("The parent_nodeacl parameter must be " \
@@ -1207,7 +1204,7 @@ class MappedLUN(CFSNode):
         else:
             if os.path.islink(lun_link):
                 os.unlink(lun_link)
-        super(MappedLUN, self).delete()
+        super().delete()
 
     mapped_lun = property(_get_mapped_lun,
             doc="Get the integer MappedLUN mapped_lun index.")
@@ -1251,7 +1248,7 @@ class MappedLUN(CFSNode):
             err_func("Creating MappedLUN object %d failed" % mlun['index'])
 
     def dump(self):
-        d = super(MappedLUN, self).dump()
+        d = super().dump()
         d['write_protect'] = self.write_protect
         d['index'] = self.mapped_lun
         d['tpg_lun'] = self.tpg_lun.lun
@@ -1259,7 +1256,7 @@ class MappedLUN(CFSNode):
         return d
 
 
-class Group(object):
+class Group:
     '''
     An abstract base class akin to CFSNode, but for classes that
     emulate a higher-level group object across the actual NodeACL
@@ -1345,7 +1342,7 @@ class NodeACLGroup(Group):
         return "<NodeACLGroup %s>" % self.name
 
     def __init__(self, parent_tpg, name):
-        super(NodeACLGroup, self).__init__(NodeACLGroup._node_acls.fget)
+        super().__init__(NodeACLGroup._node_acls.fget)
         _check_group_name(name)
         self._name = name
         self._parent_tpg = parent_tpg
@@ -1545,7 +1542,7 @@ class MappedLUNGroup(Group):
         return "<MappedLUNGroup %s:lun %d>" % (self._nag.name, self._mapped_lun)
 
     def __init__(self, nodeaclgroup, mapped_lun, *args, **kwargs):
-        super(MappedLUNGroup, self).__init__(MappedLUNGroup._mapped_luns.fget)
+        super().__init__(MappedLUNGroup._mapped_luns.fget)
         self._nag = nodeaclgroup
         self._mapped_lun = mapped_lun
         for na in self._nag._node_acls:
Index: python-rtslib-fb-v2.1.76/rtslib/tcm.py
===================================================================
--- python-rtslib-fb-v2.1.76.orig/rtslib/tcm.py
+++ python-rtslib-fb-v2.1.76/rtslib/tcm.py
@@ -24,7 +24,6 @@ import re
 import glob
 import fcntl
 import resource
-from six.moves import range
 
 from .alua import ALUATargetPortGroup
 from .node import CFSNode
@@ -60,7 +59,7 @@ class StorageObject(CFSNode):
         return "<%s %s/%s>" % (self.__class__.__name__, self.plugin, self.name)
 
     def __init__(self, name, mode, index=None):
-        super(StorageObject, self).__init__()
+        super().__init__()
         if "/" in name or " " in name or "\t" in name or "\n" in name:
             raise RTSLibError("A storage object's name cannot contain "
                               " /, newline or spaces/tabs")
@@ -233,8 +232,7 @@ class StorageObject(CFSNode):
         Generates all luns attached to a storage object.
         '''
         self._check_self()
-        for lun in self._gen_attached_luns():
-            yield lun
+        yield from self._gen_attached_luns()
 
     def _list_alua_tpgs(self):
         '''
@@ -275,7 +273,7 @@ class StorageObject(CFSNode):
                 else:
                     lun.delete()
 
-        super(StorageObject, self).delete()
+        super().delete()
         self._backstore.delete()
         if save:
             from .root import RTSRoot, default_save_file
@@ -313,7 +311,7 @@ class StorageObject(CFSNode):
             doc="Returns true if ALUA can be setup. False if not supported.")
 
     def dump(self):
-        d = super(StorageObject, self).dump()
+        d = super().dump()
         d['name'] = self.name
         d['plugin'] = self.plugin
         d['alua_tpgs'] = [tpg.dump() for tpg in self.alua_tpgs]
@@ -349,14 +347,14 @@ class PSCSIStorageObject(StorageObject):
         @return: A PSCSIStorageObject object.
         '''
         if dev is not None:
-            super(PSCSIStorageObject, self).__init__(name, 'create', index)
+            super().__init__(name, 'create', index)
             try:
                 self._configure(dev)
             except:
                 self.delete()
                 raise
         else:
-            super(PSCSIStorageObject, self).__init__(name, 'lookup', index)
+            super().__init__(name, 'lookup', index)
 
     def _configure(self, dev):
         self._check_self()
@@ -402,7 +400,7 @@ class PSCSIStorageObject(StorageObject):
         self._set_udev_path(udev_path)
         self._enable()
 
-        super(PSCSIStorageObject, self)._configure()
+        super()._configure()
 
     def _set_wwn(self, wwn):
         # pscsi doesn't support setting wwn
@@ -467,7 +465,7 @@ class PSCSIStorageObject(StorageObject):
             doc="Returns true if ALUA can be setup. False if not supported.")
 
     def dump(self):
-        d = super(PSCSIStorageObject, self).dump()
+        d = super().dump()
         d['dev'] = self.udev_path
         return d
 
@@ -504,14 +502,14 @@ class RDMCPStorageObject(StorageObject):
         '''
 
         if size is not None:
-            super(RDMCPStorageObject, self).__init__(name, 'create', index)
+            super().__init__(name, 'create', index)
             try:
                 self._configure(size, wwn, nullio)
             except:
                 self.delete()
                 raise
         else:
-            super(RDMCPStorageObject, self).__init__(name, 'lookup', index)
+            super().__init__(name, 'lookup', index)
 
     def _configure(self, size, wwn, nullio):
         self._check_self()
@@ -525,7 +523,7 @@ class RDMCPStorageObject(StorageObject):
             self._control("rd_nullio=1")
         self._enable()
 
-        super(RDMCPStorageObject, self)._configure(wwn)
+        super()._configure(wwn)
 
     def _get_page_size(self):
         self._check_self()
@@ -560,7 +558,7 @@ class RDMCPStorageObject(StorageObject):
             doc="Get the nullio status.")
 
     def dump(self):
-        d = super(RDMCPStorageObject, self).dump()
+        d = super().dump()
         d['wwn'] = self.wwn
         d['size'] = self.size
         # only dump nullio if enabled
@@ -609,14 +607,14 @@ class FileIOStorageObject(StorageObject)
         '''
 
         if dev is not None:
-            super(FileIOStorageObject, self).__init__(name, 'create', index)
+            super().__init__(name, 'create', index)
             try:
                 self._configure(dev, size, wwn, write_back, aio)
             except:
                 self.delete()
                 raise
         else:
-            super(FileIOStorageObject, self).__init__(name, 'lookup', index)
+            super().__init__(name, 'lookup', index)
 
     def _configure(self, dev, size, wwn, write_back, aio):
         self._check_self()
@@ -653,7 +651,7 @@ class FileIOStorageObject(StorageObject)
 
         self._enable()
 
-        super(FileIOStorageObject, self)._configure(wwn)
+        super()._configure(wwn)
 
     def _get_wb_enabled(self):
         self._check_self()
@@ -692,7 +690,7 @@ class FileIOStorageObject(StorageObject)
             doc="True if asynchronous I/O is enabled")
 
     def dump(self):
-        d = super(FileIOStorageObject, self).dump()
+        d = super().dump()
         d['write_back'] = self.write_back
         d['wwn'] = self.wwn
         d['dev'] = self.udev_path
@@ -735,14 +733,14 @@ class BlockStorageObject(StorageObject):
         '''
 
         if dev is not None:
-            super(BlockStorageObject, self).__init__(name, 'create', index)
+            super().__init__(name, 'create', index)
             try:
                 self._configure(dev, wwn, readonly)
             except:
                 self.delete()
                 raise
         else:
-            super(BlockStorageObject, self).__init__(name, 'lookup', index)
+            super().__init__(name, 'lookup', index)
 
     def _configure(self, dev, wwn, readonly):
         self._check_self()
@@ -756,7 +754,7 @@ class BlockStorageObject(StorageObject):
         self._control("readonly=%d" % readonly)
         self._enable()
 
-        super(BlockStorageObject, self)._configure(wwn)
+        super()._configure(wwn)
 
     def _get_major(self):
         self._check_self()
@@ -796,7 +794,7 @@ class BlockStorageObject(StorageObject):
             doc="True if the device is read-only, False if read/write")
 
     def dump(self):
-        d = super(BlockStorageObject, self).dump()
+        d = super().dump()
         d['write_back'] = self.write_back
         d['readonly'] = self.readonly
         d['wwn'] = self.wwn
@@ -836,14 +834,14 @@ class UserBackedStorageObject(StorageObj
             if '/' not in config:
                 raise RTSLibError("'config' must contain a '/' separating subtype "
                                   "from its configuration string")
-            super(UserBackedStorageObject, self).__init__(name, 'create', index)
+            super().__init__(name, 'create', index)
             try:
                 self._configure(config, size, wwn, hw_max_sectors, control)
             except:
                 self.delete()
                 raise
         else:
-            super(UserBackedStorageObject, self).__init__(name, 'lookup', index)
+            super().__init__(name, 'lookup', index)
 
     def _configure(self, config, size, wwn, hw_max_sectors, control):
         self._check_self()
@@ -858,7 +856,7 @@ class UserBackedStorageObject(StorageObj
             self._control(control)
         self._enable()
 
-        super(UserBackedStorageObject, self)._configure(wwn)
+        super()._configure(wwn)
 
     def _get_size(self):
         self._check_self()
@@ -909,7 +907,7 @@ class UserBackedStorageObject(StorageObj
             doc="Returns true if ALUA can be setup. False if not supported.")
 
     def dump(self):
-        d = super(UserBackedStorageObject, self).dump()
+        d = super().dump()
         d['wwn'] = self.wwn
         d['size'] = self.size
         d['config'] = self.config
@@ -919,7 +917,7 @@ class UserBackedStorageObject(StorageObj
         return d
 
 
-class StorageObjectFactory(object):
+class StorageObjectFactory:
     """
     Create a storage object based on a given path.
     Only works for file & block.
@@ -968,7 +966,7 @@ class _Backstore(CFSNode):
     """
 
     def __init__(self, name, storage_object_cls, mode, index=None):
-        super(_Backstore, self).__init__()
+        super().__init__()
         self._so_cls = storage_object_cls
         self._plugin = bs_params[self._so_cls]['name']
 
@@ -1025,7 +1023,7 @@ class _Backstore(CFSNode):
             raise
 
     def delete(self):
-        super(_Backstore, self).delete()
+        super().delete()
         if self._lookup_key in bs_cache:
             del bs_cache[self._lookup_key]
 
Index: python-rtslib-fb-v2.1.76/rtslib/utils.py
===================================================================
--- python-rtslib-fb-v2.1.76.orig/rtslib/utils.py
+++ python-rtslib-fb-v2.1.76/rtslib/utils.py
@@ -97,7 +97,7 @@ def fread(path):
     @return: A string containing the file's contents.
 
     '''
-    with open(path, 'r') as file_fd:
+    with open(path) as file_fd:
         return file_fd.read().strip()
 
 def is_dev_in_use(path):
@@ -115,7 +115,7 @@ def is_dev_in_use(path):
     path = os.path.realpath(str(path))
     try:
         device = pyudev.Device.from_device_file(_CONTEXT, path)
-        if device.subsystem == u'scsi_generic':
+        if device.subsystem == 'scsi_generic':
             file_fd = os.open(path, os.O_EXCL|os.O_NDELAY|os.O_RDWR)
         else:
             file_fd = os.open(path, os.O_EXCL|os.O_NDELAY)
@@ -220,10 +220,10 @@ def get_blockdev_type(path):
     '''
     try:
         device = pyudev.Device.from_device_file(_CONTEXT, path)
-    except (pyudev.DeviceNotFoundError, EnvironmentError, ValueError):
+    except (OSError, pyudev.DeviceNotFoundError, ValueError):
         return None
 
-    if device.subsystem != u'block':
+    if device.subsystem != 'block':
         return None
 
     attributes = device.attributes
@@ -505,14 +505,14 @@ def _set_auth_attr(self, value, attribut
             raise
 
 def set_attributes(obj, attr_dict, err_func):
-    for name, value in six.iteritems(attr_dict):
+    for name, value in attr_dict.items():
         try:
             obj.set_attribute(name, value)
         except RTSLibError as e:
             err_func(str(e))
 
 def set_parameters(obj, param_dict, err_func):
-    for name, value in six.iteritems(param_dict):
+    for name, value in param_dict.items():
         try:
             obj.set_parameter(name, value)
         except RTSLibError as e:
Index: python-rtslib-fb-v2.1.76/scripts/targetctl
===================================================================
--- python-rtslib-fb-v2.1.76.orig/scripts/targetctl
+++ python-rtslib-fb-v2.1.76/scripts/targetctl
@@ -22,7 +22,6 @@ under the License.
 # A script to save/restore LIO configuration to/from a file in json format
 #
 
-from __future__ import print_function
 
 from rtslib_fb import RTSRoot
 import os
@@ -45,7 +44,7 @@ def restore(from_file):
 
     try:
         errors = RTSRoot().restore_from_file(restore_file=from_file)
-    except IOError:
+    except OSError:
         # Not an error if the restore file is not present
         print("No saved config file at %s, ok, exiting" % from_file)
         sys.exit(0)

Places

File rtslib-refactor-to-python3.patch of Package python-rtslib-fb (Revision 2b58b85f136e69cc04d20d548240213c)

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