root / snf-pithos-tools / pithos / tools / fs.py @ 9e826a59
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#!/usr/bin/env python
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# Copyright 2011 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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from cStringIO import StringIO |
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from errno import (EACCES, EBADF, EINVAL, EISDIR, EIO, ENOENT, ENOTDIR, |
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ENOTEMPTY) |
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from getpass import getuser |
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from stat import S_IFDIR, S_IFREG |
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from sys import argv |
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from time import time |
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from pithos.lib.compat import parse_http_date |
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from pithos.lib.client import OOS_Client, Fault |
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from pithos.lib.fuse import FUSE, FuseOSError, Operations |
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from pithos.lib.util import get_user, get_auth, get_server |
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epoch = int(time())
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class StoreFS(Operations): |
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def __init__(self, verbose=False): |
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self.verbose = verbose
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self.client = OOS_Client(get_server(), get_auth(), get_user())
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def __call__(self, op, path, *args): |
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container, sep, object = path[1:].partition('/') |
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if self.verbose: |
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data = repr(args)[:100] |
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print '-> %s %r %r %r' % (op, container, object, data) |
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ret = '[Unhandled Exception]'
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try:
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if object: |
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func = getattr(self, 'object_' + op, None) |
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funcargs = (container, object) + args
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elif container:
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func = getattr(self, 'container_' + op, None) |
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funcargs = (container,) + args |
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else:
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func = getattr(self, 'account_' + op, None) |
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funcargs = args |
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if not func: |
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# Fallback to defaults
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func = getattr(self, op) |
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funcargs = (path,) + args |
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ret = func(*funcargs) |
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return ret
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except FuseOSError, e:
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ret = str(e)
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raise
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finally:
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if self.verbose: |
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print '<-', op, repr(ret) |
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def _get_container_meta(self, container, **kwargs): |
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try:
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return self.client.retrieve_container_metadata(container, **kwargs) |
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except Fault:
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raise FuseOSError(ENOENT)
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def _get_object_meta(self, container, object, **kwargs): |
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try:
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return self.client.retrieve_object_metadata(container, object, |
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**kwargs) |
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except Fault:
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raise FuseOSError(ENOENT)
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# Global
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def statfs(self, path): |
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return dict(f_bsize=1024, f_blocks=1024**2, f_bfree=1024**2, |
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f_bavail=1024**2) |
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# Account Level
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def account_chmod(self, mode): |
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self.client.update_account_metadata(mode=str(mode)) |
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def account_chown(self, uid, gid): |
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self.client.update_account_metadata(uid=uid, gid=gid)
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def account_getattr(self, fh=None): |
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meta = self.client.retrieve_account_metadata()
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mode = int(meta.get('x-account-meta-mode', 0755)) |
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last_modified = meta.get('last-modified', None) |
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modified = parse_http_date(last_modified) if last_modified else epoch |
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count = int(meta['x-account-container-count']) |
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uid = int(meta.get('x-account-meta-uid', 0)) |
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gid = int(meta.get('x-account-meta-gid', 0)) |
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return {
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'st_mode': S_IFDIR | mode,
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'st_nlink': 2 + count, |
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'st_uid': uid,
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'st_gid': gid,
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'st_ctime': epoch,
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'st_mtime': modified,
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'st_atime': modified}
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def account_getxattr(self, name, position=0): |
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meta = self.client.retrieve_account_metadata(restricted=True) |
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return meta.get('xattr-' + name, '') |
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def account_listxattr(self): |
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meta = self.client.retrieve_account_metadata(restricted=True) |
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prefix = 'xattr-'
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return [k[len(prefix):] for k in meta if k.startswith(prefix)] |
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def account_readdir(self, fh): |
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return ['.', '..'] + self.client.list_containers() or [] |
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def account_removexattr(self, name): |
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attr = 'xattr-' + name
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self.client.delete_account_metadata([attr])
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def account_setxattr(self, name, value, options, position=0): |
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attr = 'xattr-' + name
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meta = {attr: value} |
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self.client.update_account_metadata(**meta)
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# Container Level
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def container_chmod(self, container, mode): |
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self.client.update_container_metadata(container, mode=str(mode)) |
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def container_chown(self, container, uid, gid): |
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self.client.update_container_metadata(container, uid=uid, gid=gid)
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def container_getattr(self, container, fh=None): |
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meta = self._get_container_meta(container)
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mode = int(meta.get('x-container-meta-mode', 0755)) |
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modified = parse_http_date(meta['last-modified'])
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count = int(meta['x-container-object-count']) |
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uid = int(meta.get('x-account-meta-uid', 0)) |
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gid = int(meta.get('x-account-meta-gid', 0)) |
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return {
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'st_mode': S_IFDIR | mode,
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'st_nlink': 2 + count, |
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'st_uid': uid,
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'st_gid': gid,
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'st_ctime': epoch,
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'st_mtime': modified,
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'st_atime': modified}
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def container_getxattr(self, container, name, position=0): |
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meta = self._get_container_meta(container)
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return meta.get('xattr-' + name, '') |
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def container_listxattr(self, container): |
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meta = self._get_container_meta(container, restricted=True) |
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prefix = 'xattr-'
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return [k[len(prefix):] for k in meta if k.startswith(prefix)] |
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def container_mkdir(self, container, mode): |
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mode = str(mode & 0777) |
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self.client.create_container(container, mode=mode)
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def container_readdir(self, container, fh): |
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objects = self.client.list_objects(container, delimiter='/', prefix='') |
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files = [o for o in objects if not o.endswith('/')] |
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return ['.', '..'] + files |
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def container_removexattr(self, container, name): |
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attr = 'xattr-' + name
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self.client.delete_container_metadata(container, [attr])
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def container_rename(self, container, path): |
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new_container, sep, new_object = path[1:].partition('/') |
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if not new_container or new_object: |
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raise FuseOSError(EINVAL)
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self.client.delete_container(container)
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self.client.create_container(new_container)
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def container_rmdir(self, container): |
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try:
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self.client.delete_container(container)
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except Fault:
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raise FuseOSError(ENOENT)
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def container_setxattr(self, container, name, value, options, position=0): |
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attr = 'xattr-' + name
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meta = {attr: value} |
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self.client.update_container_metadata(container, **meta)
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# Object Level
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def object_chmod(self, container, object, mode): |
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self.client.update_object_metadata(container, object, mode=str(mode)) |
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def object_chown(self, container, uid, gid): |
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self.client.update_object_metadata(container, object, |
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uid=str(uid), gid=str(gid)) |
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def object_create(self, container, object, mode, fi=None): |
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mode &= 0777
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self.client.create_object(container, object, |
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f=None,
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content_type='application/octet-stream',
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mode=str(mode))
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return 0 |
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def object_getattr(self, container, object, fh=None): |
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meta = self._get_object_meta(container, object) |
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modified = parse_http_date(meta['last-modified'])
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uid = int(meta.get('x-account-meta-uid', 0)) |
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gid = int(meta.get('x-account-meta-gid', 0)) |
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size = int(meta.get('content-length', 0)) |
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if meta['content-type'] == 'application/directory': |
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mode = int(meta.get('x-object-meta-mode', 0755)) |
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flags = S_IFDIR |
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nlink = 2
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else:
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mode = int(meta.get('x-object-meta-mode', 0644)) |
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flags = S_IFREG |
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nlink = 1
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return {
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'st_mode': flags | mode,
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'st_nlink': nlink,
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'st_uid': uid,
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'st_gid': gid,
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'st_ctime': epoch,
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'st_mtime': modified,
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'st_atime': modified,
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'st_size': size}
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def object_getxattr(self, container, object, name, position=0): |
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meta = self._get_object_meta(container, object, restricted=True) |
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return meta.get('xattr-' + name, '') |
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def object_listxattr(self, container, object): |
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meta = self._get_object_meta(container, object, restricted=True) |
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prefix = 'xattr-'
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return [k[len(prefix):] for k in meta if k.startswith(prefix)] |
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def object_mkdir(self, container, object, mode): |
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mode = str(mode & 0777) |
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self.client.create_directory_marker(container, object) |
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self.client.update_object_metadata(container, object, mode=mode) |
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def object_read(self, container, object, nbyte, offset, fh): |
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data = self.client.retrieve_object(container, object) |
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return data[offset:offset + nbyte]
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def object_readdir(self, container, object, fh): |
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objects = self.client.list_objects(container, delimiter='/', |
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prefix=object)
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files = [o.rpartition('/')[2] for o in objects if not o.endswith('/')] |
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return ['.', '..'] + files |
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def object_removexattr(self, container, object, name): |
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attr = 'xattr-' + name
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self.client.delete_object_metadata(container, object, [attr]) |
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def object_rename(self, container, object, path): |
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new_container, sep, new_object = path[1:].partition('/') |
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if not new_container or not new_object: |
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raise FuseOSError(EINVAL)
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self.client.move_object(container, object, new_container, new_object) |
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def object_rmdir(self, container, object): |
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self.client.delete_object(container, object) |
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def object_setxattr(self, container, object, name, value, options, |
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position=0):
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attr = 'xattr-' + name
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meta = {attr: value} |
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self.client.update_object_metadata(container, object, **meta) |
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def object_truncate(self, container, object, length, fh=None): |
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data = self.client.retrieve_object(container, object) |
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f = StringIO(data[:length]) |
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self.client.update_object(container, object, f) |
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def object_unlink(self, container, object): |
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self.client.delete_object(container, object) |
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def object_write(self, container, object, data, offset, fh): |
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f = StringIO(data) |
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self.client.update_object(container, object, f, offset=offset) |
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return len(data) |
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def main(): |
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if len(argv) != 2: |
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print 'usage: %s <mountpoint>' % argv[0] |
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exit(1) |
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user = getuser() |
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fs = StoreFS(verbose=True)
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fuse = FUSE(fs, argv[1], foreground=True) |
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if __name__ == '__main__': |
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main() |
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