# Derived from portconquery.py
#
# SPDX-License-Identifier: LGPL-2.1-only
#
import logging
from typing import Iterable, Optional, Tuple
from .mixins import MatchContext
from .policyrep import Iomemcon, IomemconRange
from .query import PolicyQuery
from .util import match_range
class IomemconQuery(MatchContext, PolicyQuery):
"""
Iomemcon context query.
Parameter:
policy The policy to query.
Keyword Parameters/Class attributes:
addr A 2-tuple of the memory addr range to match. (Set both to
the same value for a single mem addr)
addr_subset If true, the criteria will match if it is a subset
of the iomemcon's range.
addr_overlap If true, the criteria will match if it overlaps
any of the iomemcon's range.
addr_superset If true, the criteria will match if it is a superset
of the iomemcon's range.
addr_proper If true, use proper superset/subset operations.
No effect if not using set operations.
user The criteria to match the context's user.
user_regex If true, regular expression matching
will be used on the user.
role The criteria to match the context's role.
role_regex If true, regular expression matching
will be used on the role.
type_ The criteria to match the context's type.
type_regex If true, regular expression matching
will be used on the type.
range_ The criteria to match the context's range.
range_subset If true, the criteria will match if it is a subset
of the context's range.
range_overlap If true, the criteria will match if it overlaps
any of the context's range.
range_superset If true, the criteria will match if it is a superset
of the context's range.
range_proper If true, use proper superset/subset operations.
No effect if not using set operations.
"""
_addr: Optional[IomemconRange] = None
addr_subset: bool = False
addr_overlap: bool = False
addr_superset: bool = False
addr_proper: bool = False
@property
def addr(self) -> Optional[IomemconRange]:
return self._addr
@addr.setter
def addr(self, value: Optional[Tuple[int, int]]) -> None:
if value:
pending_addr = IomemconRange(*value)
if pending_addr.low < 1 or pending_addr.high < 1:
raise ValueError("Memory address must be positive: {0.low}-{0.high}".
format(pending_addr))
if pending_addr.low > pending_addr.high:
raise ValueError(
"The low mem addr must be smaller than the high mem addr: {0.low}-{0.high}".
format(pending_addr))
self._addr = pending_addr
else:
self._addr = None
def __init__(self, policy, **kwargs) -> None:
super(IomemconQuery, self).__init__(policy, **kwargs)
self.log = logging.getLogger(__name__)
def results(self) -> Iterable[Iomemcon]:
"""Generator which yields all matching iomemcons."""
self.log.info("Generating results from {0.policy}".format(self))
self.log.debug("Address: {0.addr!r}, overlap: {0.addr_overlap}, "
"subset: {0.addr_subset}, superset: {0.addr_superset}, "
"proper: {0.addr_proper}".format(self))
self._match_context_debug(self.log)
for iomemcon in self.policy.iomemcons():
if self.addr and not match_range(
iomemcon.addr,
self.addr,
self.addr_subset,
self.addr_overlap,
self.addr_superset,
self.addr_proper):
continue
if not self._match_context(iomemcon.context):
continue
yield iomemcon
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