root / snf-pithos-backend / pithos / backends / modular.py @ 39ef6f41
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# Copyright 2011-2012 GRNET S.A. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or
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# without modification, are permitted provided that the following
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# conditions are met:
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#
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# 1. Redistributions of source code must retain the above
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# copyright notice, this list of conditions and the following
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# disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following
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# disclaimer in the documentation and/or other materials
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# provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
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# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
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# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#
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# The views and conclusions contained in the software and
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# documentation are those of the authors and should not be
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# interpreted as representing official policies, either expressed
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# or implied, of GRNET S.A.
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import sys |
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import os |
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import time |
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import uuid as uuidlib |
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import logging |
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import hashlib |
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import binascii |
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from base import DEFAULT_QUOTA, DEFAULT_VERSIONING, NotAllowedError, QuotaError, BaseBackend |
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# Stripped-down version of the HashMap class found in tools.
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class HashMap(list): |
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def __init__(self, blocksize, blockhash): |
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super(HashMap, self).__init__() |
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self.blocksize = blocksize
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self.blockhash = blockhash
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def _hash_raw(self, v): |
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h = hashlib.new(self.blockhash)
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h.update(v) |
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return h.digest()
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def hash(self): |
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if len(self) == 0: |
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return self._hash_raw('') |
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if len(self) == 1: |
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return self.__getitem__(0) |
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h = list(self) |
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s = 2
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while s < len(h): |
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s = s * 2
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h += [('\x00' * len(h[0]))] * (s - len(h)) |
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while len(h) > 1: |
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h = [self._hash_raw(h[x] + h[x + 1]) for x in range(0, len(h), 2)] |
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return h[0] |
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# Default modules and settings.
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DEFAULT_DB_MODULE = 'pithos.backends.lib.sqlalchemy'
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DEFAULT_DB_CONNECTION = 'sqlite:///backend.db'
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DEFAULT_BLOCK_MODULE = 'pithos.backends.lib.hashfiler'
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DEFAULT_BLOCK_PATH = 'data/'
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#DEFAULT_QUEUE_MODULE = 'pithos.backends.lib.rabbitmq'
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#DEFAULT_QUEUE_CONNECTION = 'rabbitmq://guest:guest@localhost:5672/pithos'
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QUEUE_MESSAGE_KEY = 'pithos'
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QUEUE_CLIENT_ID = 'pithos'
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( CLUSTER_NORMAL, CLUSTER_HISTORY, CLUSTER_DELETED ) = range(3) |
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inf = float('inf') |
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ULTIMATE_ANSWER = 42
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logger = logging.getLogger(__name__) |
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def backend_method(func=None, autocommit=1): |
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if func is None: |
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def fn(func): |
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return backend_method(func, autocommit)
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return fn
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if not autocommit: |
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return func
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def fn(self, *args, **kw): |
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self.wrapper.execute()
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try:
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self.messages = []
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ret = func(self, *args, **kw)
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self.wrapper.commit()
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for m in self.messages: |
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self.queue.send(*m)
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return ret
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except:
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self.wrapper.rollback()
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raise
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return fn
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class ModularBackend(BaseBackend): |
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"""A modular backend.
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Uses modules for SQL functions and storage.
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"""
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def __init__(self, db_module=None, db_connection=None, |
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block_module=None, block_path=None, |
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queue_module=None, queue_connection=None): |
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db_module = db_module or DEFAULT_DB_MODULE
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db_connection = db_connection or DEFAULT_DB_CONNECTION
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block_module = block_module or DEFAULT_BLOCK_MODULE
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block_path = block_path or DEFAULT_BLOCK_PATH
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#queue_module = queue_module or DEFAULT_QUEUE_MODULE
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#queue_connection = queue_connection or DEFAULT_QUEUE_CONNECTION
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self.hash_algorithm = 'sha256' |
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self.block_size = 4 * 1024 * 1024 # 4MB |
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self.default_policy = {'quota': DEFAULT_QUOTA, 'versioning': DEFAULT_VERSIONING} |
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def load_module(m): |
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__import__(m)
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return sys.modules[m]
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self.db_module = load_module(db_module)
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self.wrapper = self.db_module.DBWrapper(db_connection) |
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params = {'wrapper': self.wrapper} |
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self.permissions = self.db_module.Permissions(**params) |
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for x in ['READ', 'WRITE']: |
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setattr(self, x, getattr(self.db_module, x)) |
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self.node = self.db_module.Node(**params) |
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for x in ['ROOTNODE', 'SERIAL', 'HASH', 'SIZE', 'TYPE', 'MTIME', 'MUSER', 'UUID', 'CHECKSUM', 'CLUSTER', 'MATCH_PREFIX', 'MATCH_EXACT']: |
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setattr(self, x, getattr(self.db_module, x)) |
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self.block_module = load_module(block_module)
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params = {'path': block_path,
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'block_size': self.block_size, |
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'hash_algorithm': self.hash_algorithm} |
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self.store = self.block_module.Store(**params) |
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if queue_module and queue_connection: |
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self.queue_module = load_module(queue_module)
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params = {'exchange': queue_connection,
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'message_key': QUEUE_MESSAGE_KEY,
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'client_id': QUEUE_CLIENT_ID}
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self.queue = self.queue_module.Queue(**params) |
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else:
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class NoQueue: |
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def send(self, *args): |
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pass
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def close(self): |
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pass
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self.queue = NoQueue()
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def close(self): |
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self.wrapper.close()
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self.queue.close()
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@backend_method
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def list_accounts(self, user, marker=None, limit=10000): |
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"""Return a list of accounts the user can access."""
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logger.debug("list_accounts: %s %s %s", user, marker, limit)
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allowed = self._allowed_accounts(user)
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start, limit = self._list_limits(allowed, marker, limit)
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return allowed[start:start + limit]
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@backend_method
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def get_account_meta(self, user, account, domain, until=None, include_user_defined=True): |
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"""Return a dictionary with the account metadata for the domain."""
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logger.debug("get_account_meta: %s %s %s", account, domain, until)
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path, node = self._lookup_account(account, user == account)
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if user != account:
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if until or node is None or account not in self._allowed_accounts(user): |
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raise NotAllowedError
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try:
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props = self._get_properties(node, until)
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mtime = props[self.MTIME]
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except NameError: |
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props = None
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mtime = until |
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count, bytes, tstamp = self._get_statistics(node, until) |
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tstamp = max(tstamp, mtime)
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if until is None: |
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modified = tstamp |
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else:
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modified = self._get_statistics(node)[2] # Overall last modification. |
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modified = max(modified, mtime)
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if user != account:
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meta = {'name': account}
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else:
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meta = {} |
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if props is not None and include_user_defined: |
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meta.update(dict(self.node.attribute_get(props[self.SERIAL], domain))) |
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if until is not None: |
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meta.update({'until_timestamp': tstamp})
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meta.update({'name': account, 'count': count, 'bytes': bytes}) |
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meta.update({'modified': modified})
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return meta
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@backend_method
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def update_account_meta(self, user, account, domain, meta, replace=False): |
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"""Update the metadata associated with the account for the domain."""
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logger.debug("update_account_meta: %s %s %s %s", account, domain, meta, replace)
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if user != account:
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raise NotAllowedError
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path, node = self._lookup_account(account, True) |
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self._put_metadata(user, node, domain, meta, replace)
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@backend_method
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def get_account_groups(self, user, account): |
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"""Return a dictionary with the user groups defined for this account."""
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logger.debug("get_account_groups: %s", account)
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if user != account:
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if account not in self._allowed_accounts(user): |
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raise NotAllowedError
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return {}
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self._lookup_account(account, True) |
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return self.permissions.group_dict(account) |
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@backend_method
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def update_account_groups(self, user, account, groups, replace=False): |
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"""Update the groups associated with the account."""
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logger.debug("update_account_groups: %s %s %s", account, groups, replace)
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if user != account:
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raise NotAllowedError
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self._lookup_account(account, True) |
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self._check_groups(groups)
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if replace:
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self.permissions.group_destroy(account)
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for k, v in groups.iteritems(): |
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if not replace: # If not already deleted. |
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self.permissions.group_delete(account, k)
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if v:
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self.permissions.group_addmany(account, k, v)
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@backend_method
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def get_account_policy(self, user, account): |
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"""Return a dictionary with the account policy."""
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logger.debug("get_account_policy: %s", account)
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if user != account:
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if account not in self._allowed_accounts(user): |
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raise NotAllowedError
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return {}
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path, node = self._lookup_account(account, True) |
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return self._get_policy(node) |
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@backend_method
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def update_account_policy(self, user, account, policy, replace=False): |
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"""Update the policy associated with the account."""
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logger.debug("update_account_policy: %s %s %s", account, policy, replace)
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if user != account:
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raise NotAllowedError
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path, node = self._lookup_account(account, True) |
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self._check_policy(policy)
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self._put_policy(node, policy, replace)
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@backend_method
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def put_account(self, user, account, policy={}): |
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"""Create a new account with the given name."""
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logger.debug("put_account: %s %s", account, policy)
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if user != account:
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raise NotAllowedError
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node = self.node.node_lookup(account)
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if node is not None: |
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raise NameError('Account already exists') |
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if policy:
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self._check_policy(policy)
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node = self._put_path(user, self.ROOTNODE, account) |
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self._put_policy(node, policy, True) |
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@backend_method
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def delete_account(self, user, account): |
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"""Delete the account with the given name."""
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logger.debug("delete_account: %s", account)
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if user != account:
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raise NotAllowedError
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node = self.node.node_lookup(account)
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if node is None: |
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return
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if not self.node.node_remove(node): |
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raise IndexError('Account is not empty') |
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self.permissions.group_destroy(account)
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@backend_method
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def list_containers(self, user, account, marker=None, limit=10000, shared=False, until=None): |
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"""Return a list of containers existing under an account."""
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logger.debug("list_containers: %s %s %s %s %s", account, marker, limit, shared, until)
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if user != account:
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if until or account not in self._allowed_accounts(user): |
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raise NotAllowedError
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allowed = self._allowed_containers(user, account)
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start, limit = self._list_limits(allowed, marker, limit)
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return allowed[start:start + limit]
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if shared:
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allowed = [x.split('/', 2)[1] for x in self.permissions.access_list_shared(account)] |
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allowed = list(set(allowed)) |
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start, limit = self._list_limits(allowed, marker, limit)
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return allowed[start:start + limit]
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node = self.node.node_lookup(account)
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return [x[0] for x in self._list_object_properties(node, account, '', '/', marker, limit, False, None, [], until)] |
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@backend_method
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def list_container_meta(self, user, account, container, domain, until=None): |
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"""Return a list with all the container's object meta keys for the domain."""
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logger.debug("list_container_meta: %s %s %s %s", account, container, domain, until)
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allowed = [] |
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if user != account:
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if until:
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raise NotAllowedError
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allowed = self.permissions.access_list_paths(user, '/'.join((account, container))) |
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if not allowed: |
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raise NotAllowedError
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path, node = self._lookup_container(account, container)
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before = until if until is not None else inf |
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allowed = self._get_formatted_paths(allowed)
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return self.node.latest_attribute_keys(node, domain, before, CLUSTER_DELETED, allowed) |
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@backend_method
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def get_container_meta(self, user, account, container, domain, until=None, include_user_defined=True): |
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"""Return a dictionary with the container metadata for the domain."""
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logger.debug("get_container_meta: %s %s %s %s", account, container, domain, until)
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if user != account:
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if until or container not in self._allowed_containers(user, account): |
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raise NotAllowedError
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path, node = self._lookup_container(account, container)
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props = self._get_properties(node, until)
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mtime = props[self.MTIME]
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count, bytes, tstamp = self._get_statistics(node, until) |
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tstamp = max(tstamp, mtime)
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if until is None: |
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modified = tstamp |
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else:
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modified = self._get_statistics(node)[2] # Overall last modification. |
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modified = max(modified, mtime)
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if user != account:
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meta = {'name': container}
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else:
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meta = {} |
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if include_user_defined:
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meta.update(dict(self.node.attribute_get(props[self.SERIAL], domain))) |
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if until is not None: |
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meta.update({'until_timestamp': tstamp})
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meta.update({'name': container, 'count': count, 'bytes': bytes}) |
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meta.update({'modified': modified})
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return meta
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@backend_method
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def update_container_meta(self, user, account, container, domain, meta, replace=False): |
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"""Update the metadata associated with the container for the domain."""
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logger.debug("update_container_meta: %s %s %s %s %s", account, container, domain, meta, replace)
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if user != account:
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raise NotAllowedError
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path, node = self._lookup_container(account, container)
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src_version_id, dest_version_id = self._put_metadata(user, node, domain, meta, replace)
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if src_version_id is not None: |
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versioning = self._get_policy(node)['versioning'] |
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if versioning != 'auto': |
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self.node.version_remove(src_version_id)
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@backend_method
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def get_container_policy(self, user, account, container): |
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"""Return a dictionary with the container policy."""
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logger.debug("get_container_policy: %s %s", account, container)
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if user != account:
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if container not in self._allowed_containers(user, account): |
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raise NotAllowedError
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return {}
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path, node = self._lookup_container(account, container)
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return self._get_policy(node) |
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|
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@backend_method
|
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def update_container_policy(self, user, account, container, policy, replace=False): |
407 |
"""Update the policy associated with the container."""
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|
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logger.debug("update_container_policy: %s %s %s %s", account, container, policy, replace)
|
410 |
if user != account:
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raise NotAllowedError
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path, node = self._lookup_container(account, container)
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self._check_policy(policy)
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self._put_policy(node, policy, replace)
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|
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@backend_method
|
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def put_container(self, user, account, container, policy={}): |
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"""Create a new container with the given name."""
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logger.debug("put_container: %s %s %s", account, container, policy)
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if user != account:
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raise NotAllowedError
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423 |
try:
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424 |
path, node = self._lookup_container(account, container)
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425 |
except NameError: |
426 |
pass
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427 |
else:
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raise NameError('Container already exists') |
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if policy:
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self._check_policy(policy)
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path = '/'.join((account, container))
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node = self._put_path(user, self._lookup_account(account, True)[1], path) |
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self._put_policy(node, policy, True) |
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|
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@backend_method
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def delete_container(self, user, account, container, until=None): |
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"""Delete/purge the container with the given name."""
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logger.debug("delete_container: %s %s %s", account, container, until)
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if user != account:
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raise NotAllowedError
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path, node = self._lookup_container(account, container)
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|
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if until is not None: |
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hashes, size = self.node.node_purge_children(node, until, CLUSTER_HISTORY)
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for h in hashes: |
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self.store.map_delete(h)
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self.node.node_purge_children(node, until, CLUSTER_DELETED)
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self._report_size_change(user, account, -size, {'action': 'container purge'}) |
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return
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|
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if self._get_statistics(node)[0] > 0: |
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raise IndexError('Container is not empty') |
454 |
hashes, size = self.node.node_purge_children(node, inf, CLUSTER_HISTORY)
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for h in hashes: |
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self.store.map_delete(h)
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self.node.node_purge_children(node, inf, CLUSTER_DELETED)
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self.node.node_remove(node)
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self._report_size_change(user, account, -size, {'action': 'container delete'}) |
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|
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def _list_objects(self, user, account, container, prefix, delimiter, marker, limit, virtual, domain, keys, shared, until, size_range, all_props): |
462 |
if user != account and until: |
463 |
raise NotAllowedError
|
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allowed = self._list_object_permissions(user, account, container, prefix, shared)
|
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if shared and not allowed: |
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return []
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path, node = self._lookup_container(account, container)
|
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allowed = self._get_formatted_paths(allowed)
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return self._list_object_properties(node, path, prefix, delimiter, marker, limit, virtual, domain, keys, until, size_range, allowed, all_props) |
470 |
|
471 |
def _list_object_permissions(self, user, account, container, prefix, shared): |
472 |
allowed = [] |
473 |
path = '/'.join((account, container, prefix)).rstrip('/') |
474 |
if user != account:
|
475 |
allowed = self.permissions.access_list_paths(user, path)
|
476 |
if not allowed: |
477 |
raise NotAllowedError
|
478 |
else:
|
479 |
if shared:
|
480 |
allowed = self.permissions.access_list_shared(path)
|
481 |
if not allowed: |
482 |
return []
|
483 |
return allowed
|
484 |
|
485 |
@backend_method
|
486 |
def list_objects(self, user, account, container, prefix='', delimiter=None, marker=None, limit=10000, virtual=True, domain=None, keys=[], shared=False, until=None, size_range=None): |
487 |
"""Return a list of object (name, version_id) tuples existing under a container."""
|
488 |
|
489 |
logger.debug("list_objects: %s %s %s %s %s %s %s %s %s %s %s %s", account, container, prefix, delimiter, marker, limit, virtual, domain, keys, shared, until, size_range)
|
490 |
return self._list_objects(user, account, container, prefix, delimiter, marker, limit, virtual, domain, keys, shared, until, size_range, False) |
491 |
|
492 |
@backend_method
|
493 |
def list_object_meta(self, user, account, container, prefix='', delimiter=None, marker=None, limit=10000, virtual=True, domain=None, keys=[], shared=False, until=None, size_range=None): |
494 |
"""Return a list of object metadata dicts existing under a container."""
|
495 |
|
496 |
logger.debug("list_object_meta: %s %s %s %s %s %s %s %s %s %s %s %s", account, container, prefix, delimiter, marker, limit, virtual, domain, keys, shared, until, size_range)
|
497 |
props = self._list_objects(user, account, container, prefix, delimiter, marker, limit, virtual, domain, keys, shared, until, size_range, True) |
498 |
objects = [] |
499 |
for p in props: |
500 |
if len(p) == 2: |
501 |
objects.append({'subdir': p[0]}) |
502 |
else:
|
503 |
objects.append({'name': p[0], |
504 |
'bytes': p[self.SIZE + 1], |
505 |
'type': p[self.TYPE + 1], |
506 |
'hash': p[self.HASH + 1], |
507 |
'version': p[self.SERIAL + 1], |
508 |
'version_timestamp': p[self.MTIME + 1], |
509 |
'modified': p[self.MTIME + 1] if until is None else None, |
510 |
'modified_by': p[self.MUSER + 1], |
511 |
'uuid': p[self.UUID + 1], |
512 |
'checksum': p[self.CHECKSUM + 1]}) |
513 |
return objects
|
514 |
|
515 |
@backend_method
|
516 |
def list_object_permissions(self, user, account, container, prefix=''): |
517 |
"""Return a list of paths that enforce permissions under a container."""
|
518 |
|
519 |
logger.debug("list_object_permissions: %s %s %s", account, container, prefix)
|
520 |
return self._list_object_permissions(user, account, container, prefix, True) |
521 |
|
522 |
@backend_method
|
523 |
def list_object_public(self, user, account, container, prefix=''): |
524 |
"""Return a dict mapping paths to public ids for objects that are public under a container."""
|
525 |
|
526 |
logger.debug("list_object_public: %s %s %s", account, container, prefix)
|
527 |
public = {} |
528 |
for path, p in self.permissions.public_list('/'.join((account, container, prefix))): |
529 |
public[path] = p + ULTIMATE_ANSWER |
530 |
return public
|
531 |
|
532 |
@backend_method
|
533 |
def get_object_meta(self, user, account, container, name, domain, version=None, include_user_defined=True): |
534 |
"""Return a dictionary with the object metadata for the domain."""
|
535 |
|
536 |
logger.debug("get_object_meta: %s %s %s %s %s", account, container, name, domain, version)
|
537 |
self._can_read(user, account, container, name)
|
538 |
path, node = self._lookup_object(account, container, name)
|
539 |
props = self._get_version(node, version)
|
540 |
if version is None: |
541 |
modified = props[self.MTIME]
|
542 |
else:
|
543 |
try:
|
544 |
modified = self._get_version(node)[self.MTIME] # Overall last modification. |
545 |
except NameError: # Object may be deleted. |
546 |
del_props = self.node.version_lookup(node, inf, CLUSTER_DELETED)
|
547 |
if del_props is None: |
548 |
raise NameError('Object does not exist') |
549 |
modified = del_props[self.MTIME]
|
550 |
|
551 |
meta = {} |
552 |
if include_user_defined:
|
553 |
meta.update(dict(self.node.attribute_get(props[self.SERIAL], domain))) |
554 |
meta.update({'name': name,
|
555 |
'bytes': props[self.SIZE], |
556 |
'type': props[self.TYPE], |
557 |
'hash': props[self.HASH], |
558 |
'version': props[self.SERIAL], |
559 |
'version_timestamp': props[self.MTIME], |
560 |
'modified': modified,
|
561 |
'modified_by': props[self.MUSER], |
562 |
'uuid': props[self.UUID], |
563 |
'checksum': props[self.CHECKSUM]}) |
564 |
return meta
|
565 |
|
566 |
@backend_method
|
567 |
def update_object_meta(self, user, account, container, name, domain, meta, replace=False): |
568 |
"""Update the metadata associated with the object for the domain and return the new version."""
|
569 |
|
570 |
logger.debug("update_object_meta: %s %s %s %s %s %s", account, container, name, domain, meta, replace)
|
571 |
self._can_write(user, account, container, name)
|
572 |
path, node = self._lookup_object(account, container, name)
|
573 |
src_version_id, dest_version_id = self._put_metadata(user, node, domain, meta, replace)
|
574 |
self._apply_versioning(account, container, src_version_id)
|
575 |
return dest_version_id
|
576 |
|
577 |
@backend_method
|
578 |
def get_object_permissions(self, user, account, container, name): |
579 |
"""Return the action allowed on the object, the path
|
580 |
from which the object gets its permissions from,
|
581 |
along with a dictionary containing the permissions."""
|
582 |
|
583 |
logger.debug("get_object_permissions: %s %s %s", account, container, name)
|
584 |
allowed = 'write'
|
585 |
permissions_path = self._get_permissions_path(account, container, name)
|
586 |
if user != account:
|
587 |
if self.permissions.access_check(permissions_path, self.WRITE, user): |
588 |
allowed = 'write'
|
589 |
elif self.permissions.access_check(permissions_path, self.READ, user): |
590 |
allowed = 'read'
|
591 |
else:
|
592 |
raise NotAllowedError
|
593 |
self._lookup_object(account, container, name)
|
594 |
return (allowed, permissions_path, self.permissions.access_get(permissions_path)) |
595 |
|
596 |
@backend_method
|
597 |
def update_object_permissions(self, user, account, container, name, permissions): |
598 |
"""Update the permissions associated with the object."""
|
599 |
|
600 |
logger.debug("update_object_permissions: %s %s %s %s", account, container, name, permissions)
|
601 |
if user != account:
|
602 |
raise NotAllowedError
|
603 |
path = self._lookup_object(account, container, name)[0] |
604 |
self._check_permissions(path, permissions)
|
605 |
self.permissions.access_set(path, permissions)
|
606 |
|
607 |
@backend_method
|
608 |
def get_object_public(self, user, account, container, name): |
609 |
"""Return the public id of the object if applicable."""
|
610 |
|
611 |
logger.debug("get_object_public: %s %s %s", account, container, name)
|
612 |
self._can_read(user, account, container, name)
|
613 |
path = self._lookup_object(account, container, name)[0] |
614 |
p = self.permissions.public_get(path)
|
615 |
if p is not None: |
616 |
p += ULTIMATE_ANSWER |
617 |
return p
|
618 |
|
619 |
@backend_method
|
620 |
def update_object_public(self, user, account, container, name, public): |
621 |
"""Update the public status of the object."""
|
622 |
|
623 |
logger.debug("update_object_public: %s %s %s %s", account, container, name, public)
|
624 |
self._can_write(user, account, container, name)
|
625 |
path = self._lookup_object(account, container, name)[0] |
626 |
if not public: |
627 |
self.permissions.public_unset(path)
|
628 |
else:
|
629 |
self.permissions.public_set(path)
|
630 |
|
631 |
@backend_method
|
632 |
def get_object_hashmap(self, user, account, container, name, version=None): |
633 |
"""Return the object's size and a list with partial hashes."""
|
634 |
|
635 |
logger.debug("get_object_hashmap: %s %s %s %s", account, container, name, version)
|
636 |
self._can_read(user, account, container, name)
|
637 |
path, node = self._lookup_object(account, container, name)
|
638 |
props = self._get_version(node, version)
|
639 |
hashmap = self.store.map_get(binascii.unhexlify(props[self.HASH])) |
640 |
return props[self.SIZE], [binascii.hexlify(x) for x in hashmap] |
641 |
|
642 |
def _update_object_hash(self, user, account, container, name, size, type, hash, checksum, domain, meta, replace_meta, permissions, src_node=None, src_version_id=None, is_copy=False): |
643 |
if permissions is not None and user != account: |
644 |
raise NotAllowedError
|
645 |
self._can_write(user, account, container, name)
|
646 |
if permissions is not None: |
647 |
path = '/'.join((account, container, name))
|
648 |
self._check_permissions(path, permissions)
|
649 |
|
650 |
account_path, account_node = self._lookup_account(account, True) |
651 |
container_path, container_node = self._lookup_container(account, container)
|
652 |
path, node = self._put_object_node(container_path, container_node, name)
|
653 |
pre_version_id, dest_version_id = self._put_version_duplicate(user, node, src_node=src_node, size=size, type=type, hash=hash, checksum=checksum, is_copy=is_copy) |
654 |
|
655 |
# Handle meta.
|
656 |
if src_version_id is None: |
657 |
src_version_id = pre_version_id |
658 |
self._put_metadata_duplicate(src_version_id, dest_version_id, domain, meta, replace_meta)
|
659 |
|
660 |
# Check quota.
|
661 |
del_size = self._apply_versioning(account, container, pre_version_id)
|
662 |
size_delta = size - del_size |
663 |
if size_delta > 0: |
664 |
account_quota = long(self._get_policy(account_node)['quota']) |
665 |
container_quota = long(self._get_policy(container_node)['quota']) |
666 |
if (account_quota > 0 and self._get_statistics(account_node)[1] + size_delta > account_quota) or \ |
667 |
(container_quota > 0 and self._get_statistics(container_node)[1] + size_delta > container_quota): |
668 |
# This must be executed in a transaction, so the version is never created if it fails.
|
669 |
raise QuotaError
|
670 |
self._report_size_change(user, account, size_delta, {'action': 'object update'}) |
671 |
|
672 |
if permissions is not None: |
673 |
self.permissions.access_set(path, permissions)
|
674 |
|
675 |
self._report_object_change(user, account, path, details={'version': dest_version_id, 'action': 'object update'}) |
676 |
return dest_version_id
|
677 |
|
678 |
@backend_method
|
679 |
def update_object_hashmap(self, user, account, container, name, size, type, hashmap, checksum, domain, meta={}, replace_meta=False, permissions=None): |
680 |
"""Create/update an object with the specified size and partial hashes."""
|
681 |
|
682 |
logger.debug("update_object_hashmap: %s %s %s %s %s %s %s", account, container, name, size, type, hashmap, checksum) |
683 |
if size == 0: # No such thing as an empty hashmap. |
684 |
hashmap = [self.put_block('')] |
685 |
map = HashMap(self.block_size, self.hash_algorithm) |
686 |
map.extend([binascii.unhexlify(x) for x in hashmap]) |
687 |
missing = self.store.block_search(map) |
688 |
if missing:
|
689 |
ie = IndexError()
|
690 |
ie.data = [binascii.hexlify(x) for x in missing] |
691 |
raise ie
|
692 |
|
693 |
hash = map.hash()
|
694 |
dest_version_id = self._update_object_hash(user, account, container, name, size, type, binascii.hexlify(hash), checksum, domain, meta, replace_meta, permissions) |
695 |
self.store.map_put(hash, map) |
696 |
return dest_version_id
|
697 |
|
698 |
@backend_method
|
699 |
def update_object_checksum(self, user, account, container, name, version, checksum): |
700 |
"""Update an object's checksum."""
|
701 |
|
702 |
logger.debug("update_object_checksum: %s %s %s %s %s", account, container, name, version, checksum)
|
703 |
# Update objects with greater version and same hashmap and size (fix metadata updates).
|
704 |
self._can_write(user, account, container, name)
|
705 |
path, node = self._lookup_object(account, container, name)
|
706 |
props = self._get_version(node, version)
|
707 |
versions = self.node.node_get_versions(node)
|
708 |
for x in versions: |
709 |
if x[self.SERIAL] >= int(version) and x[self.HASH] == props[self.HASH] and x[self.SIZE] == props[self.SIZE]: |
710 |
self.node.version_put_property(x[self.SERIAL], 'checksum', checksum) |
711 |
|
712 |
def _copy_object(self, user, src_account, src_container, src_name, dest_account, dest_container, dest_name, type, dest_domain=None, dest_meta={}, replace_meta=False, permissions=None, src_version=None, is_move=False): |
713 |
self._can_read(user, src_account, src_container, src_name)
|
714 |
path, node = self._lookup_object(src_account, src_container, src_name)
|
715 |
# TODO: Will do another fetch of the properties in duplicate version...
|
716 |
props = self._get_version(node, src_version) # Check to see if source exists. |
717 |
src_version_id = props[self.SERIAL]
|
718 |
hash = props[self.HASH]
|
719 |
size = props[self.SIZE]
|
720 |
|
721 |
is_copy = not is_move and (src_account, src_container, src_name) != (dest_account, dest_container, dest_name) # New uuid. |
722 |
dest_version_id = self._update_object_hash(user, dest_account, dest_container, dest_name, size, type, hash, None, dest_domain, dest_meta, replace_meta, permissions, src_node=node, src_version_id=src_version_id, is_copy=is_copy) |
723 |
return dest_version_id
|
724 |
|
725 |
@backend_method
|
726 |
def copy_object(self, user, src_account, src_container, src_name, dest_account, dest_container, dest_name, type, domain, meta={}, replace_meta=False, permissions=None, src_version=None): |
727 |
"""Copy an object's data and metadata."""
|
728 |
|
729 |
logger.debug("copy_object: %s %s %s %s %s %s %s %s %s %s %s %s", src_account, src_container, src_name, dest_account, dest_container, dest_name, type, domain, meta, replace_meta, permissions, src_version) |
730 |
dest_version_id = self._copy_object(user, src_account, src_container, src_name, dest_account, dest_container, dest_name, type, domain, meta, replace_meta, permissions, src_version, False) |
731 |
return dest_version_id
|
732 |
|
733 |
@backend_method
|
734 |
def move_object(self, user, src_account, src_container, src_name, dest_account, dest_container, dest_name, type, domain, meta={}, replace_meta=False, permissions=None): |
735 |
"""Move an object's data and metadata."""
|
736 |
|
737 |
logger.debug("move_object: %s %s %s %s %s %s %s %s %s %s %s", src_account, src_container, src_name, dest_account, dest_container, dest_name, type, domain, meta, replace_meta, permissions) |
738 |
if user != src_account:
|
739 |
raise NotAllowedError
|
740 |
dest_version_id = self._copy_object(user, src_account, src_container, src_name, dest_account, dest_container, dest_name, type, domain, meta, replace_meta, permissions, None, True) |
741 |
if (src_account, src_container, src_name) != (dest_account, dest_container, dest_name):
|
742 |
self._delete_object(user, src_account, src_container, src_name)
|
743 |
return dest_version_id
|
744 |
|
745 |
def _delete_object(self, user, account, container, name, until=None): |
746 |
if user != account:
|
747 |
raise NotAllowedError
|
748 |
|
749 |
if until is not None: |
750 |
path = '/'.join((account, container, name))
|
751 |
node = self.node.node_lookup(path)
|
752 |
if node is None: |
753 |
return
|
754 |
hashes = [] |
755 |
size = 0
|
756 |
h, s = self.node.node_purge(node, until, CLUSTER_NORMAL)
|
757 |
hashes += h |
758 |
size += s |
759 |
h, s = self.node.node_purge(node, until, CLUSTER_HISTORY)
|
760 |
hashes += h |
761 |
size += s |
762 |
for h in hashes: |
763 |
self.store.map_delete(h)
|
764 |
self.node.node_purge(node, until, CLUSTER_DELETED)
|
765 |
try:
|
766 |
props = self._get_version(node)
|
767 |
except NameError: |
768 |
self.permissions.access_clear(path)
|
769 |
self._report_size_change(user, account, -size, {'action': 'object purge'}) |
770 |
return
|
771 |
|
772 |
path, node = self._lookup_object(account, container, name)
|
773 |
src_version_id, dest_version_id = self._put_version_duplicate(user, node, size=0, type='', hash=None, checksum='', cluster=CLUSTER_DELETED) |
774 |
del_size = self._apply_versioning(account, container, src_version_id)
|
775 |
if del_size:
|
776 |
self._report_size_change(user, account, -del_size, {'action': 'object delete'}) |
777 |
self._report_object_change(user, account, path, details={'action': 'object delete'}) |
778 |
self.permissions.access_clear(path)
|
779 |
|
780 |
@backend_method
|
781 |
def delete_object(self, user, account, container, name, until=None): |
782 |
"""Delete/purge an object."""
|
783 |
|
784 |
logger.debug("delete_object: %s %s %s %s", account, container, name, until)
|
785 |
self._delete_object(user, account, container, name, until)
|
786 |
|
787 |
@backend_method
|
788 |
def list_versions(self, user, account, container, name): |
789 |
"""Return a list of all (version, version_timestamp) tuples for an object."""
|
790 |
|
791 |
logger.debug("list_versions: %s %s %s", account, container, name)
|
792 |
self._can_read(user, account, container, name)
|
793 |
path, node = self._lookup_object(account, container, name)
|
794 |
versions = self.node.node_get_versions(node)
|
795 |
return [[x[self.SERIAL], x[self.MTIME]] for x in versions if x[self.CLUSTER] != CLUSTER_DELETED] |
796 |
|
797 |
@backend_method
|
798 |
def get_uuid(self, user, uuid): |
799 |
"""Return the (account, container, name) for the UUID given."""
|
800 |
|
801 |
logger.debug("get_uuid: %s", uuid)
|
802 |
info = self.node.latest_uuid(uuid)
|
803 |
if info is None: |
804 |
raise NameError |
805 |
path, serial = info |
806 |
account, container, name = path.split('/', 2) |
807 |
self._can_read(user, account, container, name)
|
808 |
return (account, container, name)
|
809 |
|
810 |
@backend_method
|
811 |
def get_public(self, user, public): |
812 |
"""Return the (account, container, name) for the public id given."""
|
813 |
|
814 |
logger.debug("get_public: %s", public)
|
815 |
if public is None or public < ULTIMATE_ANSWER: |
816 |
raise NameError |
817 |
path = self.permissions.public_path(public - ULTIMATE_ANSWER)
|
818 |
if path is None: |
819 |
raise NameError |
820 |
account, container, name = path.split('/', 2) |
821 |
self._can_read(user, account, container, name)
|
822 |
return (account, container, name)
|
823 |
|
824 |
@backend_method(autocommit=0) |
825 |
def get_block(self, hash): |
826 |
"""Return a block's data."""
|
827 |
|
828 |
logger.debug("get_block: %s", hash) |
829 |
block = self.store.block_get(binascii.unhexlify(hash)) |
830 |
if not block: |
831 |
raise NameError('Block does not exist') |
832 |
return block
|
833 |
|
834 |
@backend_method(autocommit=0) |
835 |
def put_block(self, data): |
836 |
"""Store a block and return the hash."""
|
837 |
|
838 |
logger.debug("put_block: %s", len(data)) |
839 |
return binascii.hexlify(self.store.block_put(data)) |
840 |
|
841 |
@backend_method(autocommit=0) |
842 |
def update_block(self, hash, data, offset=0): |
843 |
"""Update a known block and return the hash."""
|
844 |
|
845 |
logger.debug("update_block: %s %s %s", hash, len(data), offset) |
846 |
if offset == 0 and len(data) == self.block_size: |
847 |
return self.put_block(data) |
848 |
h = self.store.block_update(binascii.unhexlify(hash), offset, data) |
849 |
return binascii.hexlify(h)
|
850 |
|
851 |
# Path functions.
|
852 |
|
853 |
def _generate_uuid(self): |
854 |
return str(uuidlib.uuid4()) |
855 |
|
856 |
def _put_object_node(self, path, parent, name): |
857 |
path = '/'.join((path, name))
|
858 |
node = self.node.node_lookup(path)
|
859 |
if node is None: |
860 |
node = self.node.node_create(parent, path)
|
861 |
return path, node
|
862 |
|
863 |
def _put_path(self, user, parent, path): |
864 |
node = self.node.node_create(parent, path)
|
865 |
self.node.version_create(node, None, 0, '', None, user, self._generate_uuid(), '', CLUSTER_NORMAL) |
866 |
return node
|
867 |
|
868 |
def _lookup_account(self, account, create=True): |
869 |
node = self.node.node_lookup(account)
|
870 |
if node is None and create: |
871 |
node = self._put_path(account, self.ROOTNODE, account) # User is account. |
872 |
return account, node
|
873 |
|
874 |
def _lookup_container(self, account, container): |
875 |
path = '/'.join((account, container))
|
876 |
node = self.node.node_lookup(path)
|
877 |
if node is None: |
878 |
raise NameError('Container does not exist') |
879 |
return path, node
|
880 |
|
881 |
def _lookup_object(self, account, container, name): |
882 |
path = '/'.join((account, container, name))
|
883 |
node = self.node.node_lookup(path)
|
884 |
if node is None: |
885 |
raise NameError('Object does not exist') |
886 |
return path, node
|
887 |
|
888 |
def _get_properties(self, node, until=None): |
889 |
"""Return properties until the timestamp given."""
|
890 |
|
891 |
before = until if until is not None else inf |
892 |
props = self.node.version_lookup(node, before, CLUSTER_NORMAL)
|
893 |
if props is None and until is not None: |
894 |
props = self.node.version_lookup(node, before, CLUSTER_HISTORY)
|
895 |
if props is None: |
896 |
raise NameError('Path does not exist') |
897 |
return props
|
898 |
|
899 |
def _get_statistics(self, node, until=None): |
900 |
"""Return count, sum of size and latest timestamp of everything under node."""
|
901 |
|
902 |
if until is None: |
903 |
stats = self.node.statistics_get(node, CLUSTER_NORMAL)
|
904 |
else:
|
905 |
stats = self.node.statistics_latest(node, until, CLUSTER_DELETED)
|
906 |
if stats is None: |
907 |
stats = (0, 0, 0) |
908 |
return stats
|
909 |
|
910 |
def _get_version(self, node, version=None): |
911 |
if version is None: |
912 |
props = self.node.version_lookup(node, inf, CLUSTER_NORMAL)
|
913 |
if props is None: |
914 |
raise NameError('Object does not exist') |
915 |
else:
|
916 |
try:
|
917 |
version = int(version)
|
918 |
except ValueError: |
919 |
raise IndexError('Version does not exist') |
920 |
props = self.node.version_get_properties(version)
|
921 |
if props is None or props[self.CLUSTER] == CLUSTER_DELETED: |
922 |
raise IndexError('Version does not exist') |
923 |
return props
|
924 |
|
925 |
def _put_version_duplicate(self, user, node, src_node=None, size=None, type=None, hash=None, checksum=None, cluster=CLUSTER_NORMAL, is_copy=False): |
926 |
"""Create a new version of the node."""
|
927 |
|
928 |
props = self.node.version_lookup(node if src_node is None else src_node, inf, CLUSTER_NORMAL) |
929 |
if props is not None: |
930 |
src_version_id = props[self.SERIAL]
|
931 |
src_hash = props[self.HASH]
|
932 |
src_size = props[self.SIZE]
|
933 |
src_type = props[self.TYPE]
|
934 |
src_checksum = props[self.CHECKSUM]
|
935 |
else:
|
936 |
src_version_id = None
|
937 |
src_hash = None
|
938 |
src_size = 0
|
939 |
src_type = ''
|
940 |
src_checksum = ''
|
941 |
if size is None: # Set metadata. |
942 |
hash = src_hash # This way hash can be set to None (account or container).
|
943 |
size = src_size |
944 |
if type is None: |
945 |
type = src_type |
946 |
if checksum is None: |
947 |
checksum = src_checksum |
948 |
uuid = self._generate_uuid() if (is_copy or src_version_id is None) else props[self.UUID] |
949 |
|
950 |
if src_node is None: |
951 |
pre_version_id = src_version_id |
952 |
else:
|
953 |
pre_version_id = None
|
954 |
props = self.node.version_lookup(node, inf, CLUSTER_NORMAL)
|
955 |
if props is not None: |
956 |
pre_version_id = props[self.SERIAL]
|
957 |
if pre_version_id is not None: |
958 |
self.node.version_recluster(pre_version_id, CLUSTER_HISTORY)
|
959 |
|
960 |
dest_version_id, mtime = self.node.version_create(node, hash, size, type, src_version_id, user, uuid, checksum, cluster) |
961 |
return pre_version_id, dest_version_id
|
962 |
|
963 |
def _put_metadata_duplicate(self, src_version_id, dest_version_id, domain, meta, replace=False): |
964 |
if src_version_id is not None: |
965 |
self.node.attribute_copy(src_version_id, dest_version_id)
|
966 |
if not replace: |
967 |
self.node.attribute_del(dest_version_id, domain, (k for k, v in meta.iteritems() if v == '')) |
968 |
self.node.attribute_set(dest_version_id, domain, ((k, v) for k, v in meta.iteritems() if v != '')) |
969 |
else:
|
970 |
self.node.attribute_del(dest_version_id, domain)
|
971 |
self.node.attribute_set(dest_version_id, domain, ((k, v) for k, v in meta.iteritems())) |
972 |
|
973 |
def _put_metadata(self, user, node, domain, meta, replace=False): |
974 |
"""Create a new version and store metadata."""
|
975 |
|
976 |
src_version_id, dest_version_id = self._put_version_duplicate(user, node)
|
977 |
self._put_metadata_duplicate(src_version_id, dest_version_id, domain, meta, replace)
|
978 |
return src_version_id, dest_version_id
|
979 |
|
980 |
def _list_limits(self, listing, marker, limit): |
981 |
start = 0
|
982 |
if marker:
|
983 |
try:
|
984 |
start = listing.index(marker) + 1
|
985 |
except ValueError: |
986 |
pass
|
987 |
if not limit or limit > 10000: |
988 |
limit = 10000
|
989 |
return start, limit
|
990 |
|
991 |
def _list_object_properties(self, parent, path, prefix='', delimiter=None, marker=None, limit=10000, virtual=True, domain=None, keys=[], until=None, size_range=None, allowed=[], all_props=False): |
992 |
cont_prefix = path + '/'
|
993 |
prefix = cont_prefix + prefix |
994 |
start = cont_prefix + marker if marker else None |
995 |
before = until if until is not None else inf |
996 |
filterq = keys if domain else [] |
997 |
sizeq = size_range |
998 |
|
999 |
objects, prefixes = self.node.latest_version_list(parent, prefix, delimiter, start, limit, before, CLUSTER_DELETED, allowed, domain, filterq, sizeq, all_props)
|
1000 |
objects.extend([(p, None) for p in prefixes] if virtual else []) |
1001 |
objects.sort(key=lambda x: x[0]) |
1002 |
objects = [(x[0][len(cont_prefix):],) + x[1:] for x in objects] |
1003 |
|
1004 |
start, limit = self._list_limits([x[0] for x in objects], marker, limit) |
1005 |
return objects[start:start + limit]
|
1006 |
|
1007 |
# Reporting functions.
|
1008 |
|
1009 |
def _report_size_change(self, user, account, size, details={}): |
1010 |
logger.debug("_report_size_change: %s %s %s %s", user, account, size, details)
|
1011 |
account_node = self._lookup_account(account, True)[1] |
1012 |
total = self._get_statistics(account_node)[1] |
1013 |
details.update({'user': user, 'total': total}) |
1014 |
self.messages.append((account, 'diskspace', size, details)) |
1015 |
|
1016 |
def _report_object_change(self, user, account, path, details={}): |
1017 |
logger.debug("_report_object_change: %s %s %s %s", user, account, path, details)
|
1018 |
details.update({'user': user})
|
1019 |
self.messages.append((account, 'object', path, details)) |
1020 |
|
1021 |
# Policy functions.
|
1022 |
|
1023 |
def _check_policy(self, policy): |
1024 |
for k in policy.keys(): |
1025 |
if policy[k] == '': |
1026 |
policy[k] = self.default_policy.get(k)
|
1027 |
for k, v in policy.iteritems(): |
1028 |
if k == 'quota': |
1029 |
q = int(v) # May raise ValueError. |
1030 |
if q < 0: |
1031 |
raise ValueError |
1032 |
elif k == 'versioning': |
1033 |
if v not in ['auto', 'none']: |
1034 |
raise ValueError |
1035 |
else:
|
1036 |
raise ValueError |
1037 |
|
1038 |
def _put_policy(self, node, policy, replace): |
1039 |
if replace:
|
1040 |
for k, v in self.default_policy.iteritems(): |
1041 |
if k not in policy: |
1042 |
policy[k] = v |
1043 |
self.node.policy_set(node, policy)
|
1044 |
|
1045 |
def _get_policy(self, node): |
1046 |
policy = self.default_policy.copy()
|
1047 |
policy.update(self.node.policy_get(node))
|
1048 |
return policy
|
1049 |
|
1050 |
def _apply_versioning(self, account, container, version_id): |
1051 |
"""Delete the provided version if such is the policy.
|
1052 |
Return size of object removed.
|
1053 |
"""
|
1054 |
|
1055 |
if version_id is None: |
1056 |
return 0 |
1057 |
path, node = self._lookup_container(account, container)
|
1058 |
versioning = self._get_policy(node)['versioning'] |
1059 |
if versioning != 'auto': |
1060 |
hash, size = self.node.version_remove(version_id) |
1061 |
self.store.map_delete(hash) |
1062 |
return size
|
1063 |
return 0 |
1064 |
|
1065 |
# Access control functions.
|
1066 |
|
1067 |
def _check_groups(self, groups): |
1068 |
# raise ValueError('Bad characters in groups')
|
1069 |
pass
|
1070 |
|
1071 |
def _check_permissions(self, path, permissions): |
1072 |
# raise ValueError('Bad characters in permissions')
|
1073 |
pass
|
1074 |
|
1075 |
def _get_formatted_paths(self, paths): |
1076 |
formatted = [] |
1077 |
for p in paths: |
1078 |
node = self.node.node_lookup(p)
|
1079 |
if node is not None: |
1080 |
props = self.node.version_lookup(node, inf, CLUSTER_NORMAL)
|
1081 |
if props is not None: |
1082 |
if props[self.TYPE].split(';', 1)[0].strip() in ('application/directory', 'application/folder'): |
1083 |
formatted.append((p.rstrip('/') + '/', self.MATCH_PREFIX)) |
1084 |
formatted.append((p, self.MATCH_EXACT))
|
1085 |
return formatted
|
1086 |
|
1087 |
def _get_permissions_path(self, account, container, name): |
1088 |
path = '/'.join((account, container, name))
|
1089 |
permission_paths = self.permissions.access_inherit(path)
|
1090 |
permission_paths.sort() |
1091 |
permission_paths.reverse() |
1092 |
for p in permission_paths: |
1093 |
if p == path:
|
1094 |
return p
|
1095 |
else:
|
1096 |
if p.count('/') < 2: |
1097 |
continue
|
1098 |
node = self.node.node_lookup(p)
|
1099 |
if node is not None: |
1100 |
props = self.node.version_lookup(node, inf, CLUSTER_NORMAL)
|
1101 |
if props is not None: |
1102 |
if props[self.TYPE].split(';', 1)[0].strip() in ('application/directory', 'application/folder'): |
1103 |
return p
|
1104 |
return None |
1105 |
|
1106 |
def _can_read(self, user, account, container, name): |
1107 |
if user == account:
|
1108 |
return True |
1109 |
path = '/'.join((account, container, name))
|
1110 |
if self.permissions.public_get(path) is not None: |
1111 |
return True |
1112 |
path = self._get_permissions_path(account, container, name)
|
1113 |
if not path: |
1114 |
raise NotAllowedError
|
1115 |
if not self.permissions.access_check(path, self.READ, user) and not self.permissions.access_check(path, self.WRITE, user): |
1116 |
raise NotAllowedError
|
1117 |
|
1118 |
def _can_write(self, user, account, container, name): |
1119 |
if user == account:
|
1120 |
return True |
1121 |
path = '/'.join((account, container, name))
|
1122 |
path = self._get_permissions_path(account, container, name)
|
1123 |
if not path: |
1124 |
raise NotAllowedError
|
1125 |
if not self.permissions.access_check(path, self.WRITE, user): |
1126 |
raise NotAllowedError
|
1127 |
|
1128 |
def _allowed_accounts(self, user): |
1129 |
allow = set()
|
1130 |
for path in self.permissions.access_list_paths(user): |
1131 |
allow.add(path.split('/', 1)[0]) |
1132 |
return sorted(allow) |
1133 |
|
1134 |
def _allowed_containers(self, user, account): |
1135 |
allow = set()
|
1136 |
for path in self.permissions.access_list_paths(user, account): |
1137 |
allow.add(path.split('/', 2)[1]) |
1138 |
return sorted(allow) |