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212 lines
8.0 KiB
Python
212 lines
8.0 KiB
Python
#
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# directory_util.py
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#
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# This source file is part of the FoundationDB open source project
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#
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# Copyright 2013-2018 Apple Inc. and the FoundationDB project authors
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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import random
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import struct
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import fdb
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from bindingtester import FDB_API_VERSION
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from bindingtester import util
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from bindingtester.tests import test_util
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fdb.api_version(FDB_API_VERSION)
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DEFAULT_DIRECTORY_INDEX = 4
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DEFAULT_DIRECTORY_PREFIX = 'default'
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DIRECTORY_ERROR_STRING = 'DIRECTORY_ERROR'
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class DirListEntry:
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dir_id = 0 # Used for debugging
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def __init__(self, is_directory, is_subspace, has_known_prefix=True, path=(), root=None):
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self.root = root or self
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self.path = path
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self.is_directory = is_directory
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self.is_subspace = is_subspace
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self.has_known_prefix = has_known_prefix
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self.children = {}
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self.dir_id = DirListEntry.dir_id + 1
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DirListEntry.dir_id += 1
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def __repr__(self):
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return '{DirEntry %d %r: %d}' % (self.dir_id, self.path, self.has_known_prefix)
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def get_descendant(self, subpath):
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if not subpath:
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return self
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if subpath[0] in self.children:
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return self.children[subpath[0]].get_descendant(subpath[1:])
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return DirListEntry(False, False, False) # no such descendant
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def add_child(self, subpath, default_path, root, child):
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if default_path in root.children:
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# print('Adding child %r to default directory %r at %r' % (child, root.children[default_path].path, subpath))
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c = root.children[default_path]._add_child_impl(subpath, child)
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child.has_known_prefix = c.has_known_prefix and child.has_known_prefix
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# print('Added %r' % c)
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# print('Adding child %r to directory %r at %r (%r)' % (child, self.path, subpath, self.path + subpath))
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c = self._add_child_impl(subpath, child)
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# print('Added %r' % c)
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return c
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def _add_child_impl(self, subpath, child):
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# print('%d, %d. Adding child (recursive): %s %s' % (self.dir_id, child.dir_id, repr(self.path), repr(subpath)))
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if len(subpath) == 0:
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self.has_known_prefix = self.has_known_prefix and child.has_known_prefix
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# print('%d, %d. Setting child: %d' % (self.dir_id, child.dir_id, self.has_known_prefix))
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self._merge_children(child)
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return self
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else:
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if not subpath[0] in self.children:
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# print('%d, %d. Path %s was absent from %r (%s)' % (self.dir_id, child.dir_id, repr(self.path + subpath[0:1]), repr(self), repr(self.children)))
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subdir = DirListEntry(True, True, path=self.path + subpath[0:1], root=self.root)
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subdir.has_known_prefix = len(subpath) == 1
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self.children[subpath[0]] = subdir
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else:
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subdir = self.children[subpath[0]]
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subdir.has_known_prefix = False
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# print('%d, %d. Path was present' % (self.dir_id, child.dir_id))
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return subdir._add_child_impl(subpath[1:], child)
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def _merge_children(self, other):
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if self == other:
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return
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other_children = other.children.copy()
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for c in other_children:
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if c not in self.children:
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self.children[c] = other_children[c]
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else:
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# print('%d, %d. Merging child %r and %r' % (self.dir_id, other.dir_id, self.children[c].path, other_children[c].path))
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other_children[c].has_known_prefix = other_children[c].has_known_prefix and self.children[c].has_known_prefix
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old_child = self.children[c]
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self.children[c] = other_children[c]
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old_child._merge_children(other_children[c])
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def setup_directories(instructions, default_path, random):
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dir_list = [DirListEntry(True, False, True)]
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instructions.push_args(0, '\xfe')
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instructions.append('DIRECTORY_CREATE_SUBSPACE')
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dir_list.append(DirListEntry(False, True))
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instructions.push_args(0, '')
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instructions.append('DIRECTORY_CREATE_SUBSPACE')
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dir_list.append(DirListEntry(False, True))
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instructions.push_args(1, 2, 1)
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instructions.append('DIRECTORY_CREATE_LAYER')
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dir_list.append(dir_list[0])
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create_default_directory_subspace(instructions, default_path, random)
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dir_list.append(DirListEntry(True, True, True))
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instructions.push_args(DEFAULT_DIRECTORY_INDEX)
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instructions.append('DIRECTORY_SET_ERROR_INDEX')
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return dir_list
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def create_default_directory_subspace(instructions, path, random):
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test_util.blocking_commit(instructions)
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instructions.push_args(3)
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instructions.append('DIRECTORY_CHANGE')
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prefix = random.random_string(16)
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instructions.push_args(1, path, '', '%s-%s' % (DEFAULT_DIRECTORY_PREFIX, prefix))
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instructions.append('DIRECTORY_CREATE_DATABASE')
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instructions.push_args(DEFAULT_DIRECTORY_INDEX)
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instructions.append('DIRECTORY_CHANGE')
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def push_instruction_and_record_prefix(instructions, op, op_args, path, dir_index, random, subspace):
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if not op.endswith('_DATABASE'):
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instructions.push_args(1, *test_util.with_length(path))
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instructions.append('DIRECTORY_EXISTS')
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# This op must leave the stack in the state it is in at this point, with the exception
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# that it may leave an error on the stack
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instructions.push_args(*op_args)
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instructions.append(op)
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if not op.endswith('_DATABASE'):
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instructions.push_args(dir_index)
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instructions.append('DIRECTORY_CHANGE')
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instructions.push_args(1, '', random.random_string(16), '')
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instructions.append('DIRECTORY_PACK_KEY')
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test_util.to_front(instructions, 3) # move the existence result up to the front of the stack
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t = util.subspace_to_tuple(subspace)
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instructions.push_args(len(t) + 3, *t)
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instructions.append('TUPLE_PACK') # subspace[<exists>][<packed_key>][random.random_string(16)] = ''
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instructions.append('SET')
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instructions.push_args(DEFAULT_DIRECTORY_INDEX)
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instructions.append('DIRECTORY_CHANGE')
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def check_for_duplicate_prefixes(db, subspace):
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last_prefix = None
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start_key = subspace[0].range().start
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duplicates = set()
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count = 0
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while True:
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prefixes = db.get_range(start_key, subspace[0].range().stop, limit=1000)
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if len(prefixes) == 0:
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break
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start_key = fdb.KeySelector.first_greater_than(prefixes[-1].key)
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prefixes = [subspace[0].unpack(kv.key)[0] for kv in prefixes]
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prefixes = [p for p in prefixes if not (p.startswith(DEFAULT_DIRECTORY_PREFIX) or p == DIRECTORY_ERROR_STRING)]
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count += len(prefixes)
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prefixes = [last_prefix] + prefixes
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duplicates.update([p for i, p in enumerate(prefixes[1:]) if p == prefixes[i]])
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last_prefix = prefixes[-1]
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util.get_logger().info('Checked %d directory prefixes for duplicates' % count)
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return ['The prefix %r was allocated multiple times' % d[:-2] for d in set(duplicates)]
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def validate_hca_state(db):
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hca = fdb.Subspace(('\xfe', 'hca'), '\xfe')
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counters = hca[0]
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recent = hca[1]
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last_counter = db.get_range(counters.range().start, counters.range().stop, limit=1, reverse=True)
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[(start, reported_count)] = [(counters.unpack(kv.key)[0], struct.unpack('<q', kv.value)[0]) for kv in last_counter] or [(0, 0)]
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actual_count = len(db[recent[start]: recent.range().stop])
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if actual_count > reported_count:
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return ['The HCA reports %d prefixes allocated in current window, but it actually allocated %d' % (reported_count, actual_count)]
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return []
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