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https://github.com/tahoe-lafs/tahoe-lafs.git
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00aa75d1e8
For a variety of reasons, high amongst them the fact that many people interested in fuse support for tahoe seem to have missed its existence, the existing fuse implementation for tahoe, previously 'mac/tahoefuse.py' has been renamed and moved. It was suggested that, even though the mac build depends upon it, that the mac/tahoefuse implementation be moved into contrib/fuse along with the other fuse implementations. The fact that it's not as extensively covered by unit tests as mainline tahoe was given as corroboration. In a bid to try and stem the confusion inherent in having tahoe_fuse, tfuse and tahoefuse jumbled together (not necessarily helped by referring to them as impl_a, b and c respectively) I'm hereby renaming tahoefuse as 'blackmatch' (black match is, per wikipedia "a type of crude fuse" hey, I'm a punny guy) Maybe one day it'll be promoted to be 'quickmatch' instead... Anyway, this patch moves mac/tahoefuse.py out to contrib/fuse/impl_c/ as blackmatch.py, and makes appropriate changes to the mac build process to transclude blackmatch therein. this leaves the extant fuse.py and fuseparts business in mac/ as-is and doesn't attempt to address such issues in contrib/fuse/impl_c. it is left as an exercise to the reader (or the reader of a message to follow) as to how to deal with the 'fuse' python module on the mac. as of this time, blackmatch should work on both mac and linux, and passes the four extant tests in runtests. (fwiw neither impl_a nor impl_b have I managed to get working on the mac yet) since blackmatch supports a read-write and caching fuse interface to tahoe, some write tests obviously need to be added to runtests.
923 lines
30 KiB
Python
923 lines
30 KiB
Python
#!/usr/bin/env python
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#-----------------------------------------------------------------------------------------------
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from allmydata.uri import CHKFileURI, NewDirectoryURI, LiteralFileURI
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from allmydata.scripts.common_http import do_http as do_http_req
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from allmydata.util.hashutil import tagged_hash
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from allmydata.util.assertutil import precondition
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from allmydata.util import base32
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from allmydata.scripts.common import get_aliases
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from twisted.python import usage
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import base64
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import sha
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import sys
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import os
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#import pprint
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import errno
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import stat
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# pull in some spaghetti to make this stuff work without fuse-py being installed
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try:
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import _find_fuse_parts
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junk = _find_fuse_parts
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del junk
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except ImportError:
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pass
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import fuse
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import time
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import traceback
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import simplejson
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import urllib
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VERSIONSTR="0.6"
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USAGE = 'usage: tahoe fuse [dir_cap_name] [fuse_options] mountpoint'
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DEFAULT_DIRECTORY_VALIDITY=26
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if not hasattr(fuse, '__version__'):
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raise RuntimeError, \
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"your fuse-py doesn't know of fuse.__version__, probably it's too old."
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fuse.fuse_python_api = (0, 2)
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fuse.feature_assert('stateful_files', 'has_init')
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class TahoeFuseOptions(usage.Options):
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optParameters = [
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["node-directory", None, "~/.tahoe",
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"Look here to find out which Tahoe node should be used for all "
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"operations. The directory should either contain a full Tahoe node, "
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"or a file named node.url which points to some other Tahoe node. "
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"It should also contain a file named private/aliases which contains "
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"the mapping from alias name to root dirnode URI."
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],
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["node-url", None, None,
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"URL of the tahoe node to use, a URL like \"http://127.0.0.1:8123\". "
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"This overrides the URL found in the --node-directory ."],
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["alias", None, None,
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"Which alias should be mounted."],
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["root-uri", None, None,
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"Which root directory uri should be mounted."],
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["cache-timeout", None, 20,
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"Time, in seconds, to cache directory data."],
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]
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def __init__(self):
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usage.Options.__init__(self)
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self.fuse_options = []
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self.mountpoint = None
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def opt_option(self, fuse_option):
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"""
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Pass mount options directly to fuse. See below.
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"""
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self.fuse_options.append(fuse_option)
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opt_o = opt_option
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def parseArgs(self, mountpoint=''):
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self.mountpoint = mountpoint
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def getSynopsis(self):
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return "%s [options] mountpoint" % (os.path.basename(sys.argv[0]),)
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logfile = file('tfuse.log', 'ab')
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def log(msg):
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logfile.write("%s: %s\n" % (time.asctime(), msg))
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#time.sleep(0.1)
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logfile.flush()
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fuse.flog = log
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def unicode_to_utf8(u):
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precondition(isinstance(u, unicode), repr(u))
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return u.encode('utf-8')
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def do_http(method, url, body=''):
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resp = do_http_req(method, url, body)
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log('do_http(%s, %s) -> %s, %s' % (method, url, resp.status, resp.reason))
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if resp.status not in (200, 201):
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raise RuntimeError('http response (%s, %s)' % (resp.status, resp.reason))
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else:
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return resp.read()
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def flag2mode(flags):
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log('flag2mode(%r)' % (flags,))
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#md = {os.O_RDONLY: 'r', os.O_WRONLY: 'w', os.O_RDWR: 'w+'}
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md = {os.O_RDONLY: 'rb', os.O_WRONLY: 'wb', os.O_RDWR: 'w+b'}
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m = md[flags & (os.O_RDONLY | os.O_WRONLY | os.O_RDWR)]
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if flags & os.O_APPEND:
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m = m.replace('w', 'a', 1)
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return m
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class TFSIOError(IOError):
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pass
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class ENOENT(TFSIOError):
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def __init__(self, msg):
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TFSIOError.__init__(self, errno.ENOENT, msg)
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class EINVAL(TFSIOError):
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def __init__(self, msg):
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TFSIOError.__init__(self, errno.EINVAL, msg)
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class EACCESS(TFSIOError):
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def __init__(self, msg):
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TFSIOError.__init__(self, errno.EACCESS, msg)
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class EEXIST(TFSIOError):
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def __init__(self, msg):
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TFSIOError.__init__(self, errno.EEXIST, msg)
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def logargsretexc(meth):
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def inner(self, *args, **kwargs):
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log("%s(%r, %r)" % (meth, args, kwargs))
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try:
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ret = meth(self, *args, **kwargs)
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except:
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log('exception:\n%s' % (traceback.format_exc(),))
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raise
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log("ret: %r" % (ret, ))
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return ret
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inner.__name__ = '<logwrap(%s)>' % (meth,)
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return inner
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def logexc(meth):
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def inner(self, *args, **kwargs):
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try:
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ret = meth(self, *args, **kwargs)
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except TFSIOError, tie:
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log('error: %s' % (tie,))
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raise
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except:
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log('exception:\n%s' % (traceback.format_exc(),))
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raise
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return ret
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inner.__name__ = '<logwrap(%s)>' % (meth,)
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return inner
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def log_exc():
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log('exception:\n%s' % (traceback.format_exc(),))
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class TahoeFuseFile(object):
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def __init__(self, path, flags, *mode):
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log("TFF: __init__(%r, %r, %r)" % (path, flags, mode))
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self._path = path # for tahoe put
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try:
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self.parent, self.name, self.fnode = self.tfs.get_parent_name_and_child(path)
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m = flag2mode(flags)
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log('TFF: flags2(mode) -> %s' % (m,))
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if m[0] in 'wa':
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# write
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self.fname = self.tfs.cache.tmp_file(os.urandom(20))
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if self.fnode is None:
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log('TFF: [%s] open() for write: no file node, creating new File %s' % (self.name, self.fname, ))
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self.fnode = File(0, 'URI:LIT:')
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self.fnode.tmp_fname = self.fname # XXX kill this
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self.parent.add_child(self.name, self.fnode, {})
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elif hasattr(self.fnode, 'tmp_fname'):
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self.fname = self.fnode.tmp_fname
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log('TFF: [%s] open() for write: existing file node lists %s' % (self.name, self.fname, ))
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else:
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log('TFF: [%s] open() for write: existing file node lists no tmp_file, using new %s' % (self.name, self.fname, ))
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self.file = os.fdopen(os.open(self.fname, flags|os.O_CREAT, *mode), m)
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self.fd = self.file.fileno()
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log('TFF: opened(%s) for write' % self.fname)
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self.open_for_write = True
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else:
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# read
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assert self.fnode is not None
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uri = self.fnode.get_uri()
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# XXX make this go away
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if hasattr(self.fnode, 'tmp_fname'):
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self.fname = self.fnode.tmp_fname
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log('TFF: reopening(%s) for reading' % self.fname)
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else:
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log('TFF: fetching file from cache for reading')
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self.fname = self.tfs.cache.get_file(uri)
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self.file = os.fdopen(os.open(self.fname, flags, *mode), m)
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self.fd = self.file.fileno()
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self.open_for_write = False
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log('TFF: opened(%s) for read' % self.fname)
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except:
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log_exc()
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raise
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def log(self, msg):
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log("<TFF(%s:%s)> %s" % (os.path.basename(self.fname), self.name, msg))
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@logexc
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def read(self, size, offset):
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self.log('read(%r, %r)' % (size, offset, ))
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self.file.seek(offset)
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return self.file.read(size)
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@logexc
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def write(self, buf, offset):
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self.log("write(-%s-, %r)" % (len(buf), offset))
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if not self.open_for_write:
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return -errno.EACCES
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self.file.seek(offset)
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self.file.write(buf)
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return len(buf)
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@logexc
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def release(self, flags):
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self.log("release(%r)" % (flags,))
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self.file.close()
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if self.open_for_write:
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size = os.path.getsize(self.fname)
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self.fnode.size = size
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file_cap = self.tfs.upload(self.fname)
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self.fnode.ro_uri = file_cap
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# XXX [ ] TODO: set metadata
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# write new uri into parent dir entry
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self.parent.add_child(self.name, self.fnode, {})
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self.log("uploaded: %s" % (file_cap,))
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# dbg
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print_tree()
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def _fflush(self):
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if 'w' in self.file.mode or 'a' in self.file.mode:
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self.file.flush()
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@logexc
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def fsync(self, isfsyncfile):
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self.log("fsync(%r)" % (isfsyncfile,))
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self._fflush()
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if isfsyncfile and hasattr(os, 'fdatasync'):
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os.fdatasync(self.fd)
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else:
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os.fsync(self.fd)
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@logexc
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def flush(self):
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self.log("flush()")
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self._fflush()
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# cf. xmp_flush() in fusexmp_fh.c
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os.close(os.dup(self.fd))
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@logexc
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def fgetattr(self):
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self.log("fgetattr()")
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s = os.fstat(self.fd)
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self.log("fgetattr() -> %r" % (s,))
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return s
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@logexc
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def ftruncate(self, len):
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self.log("ftruncate(%r)" % (len,))
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self.file.truncate(len)
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class TahoeFuse(fuse.Fuse):
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def __init__(self, tfs, *args, **kw):
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log("TF: __init__(%r, %r)" % (args, kw))
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self.tfs = tfs
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_tfs_ = tfs
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class MyFuseFile(TahoeFuseFile):
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tfs = _tfs_
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self.file_class = MyFuseFile
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log("TF: file_class: %r" % (self.file_class,))
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fuse.Fuse.__init__(self, *args, **kw)
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#import thread
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#thread.start_new_thread(self.launch_reactor, ())
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def log(self, msg):
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log("<TF> %s" % (msg, ))
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@logexc
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def readlink(self, path):
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self.log("readlink(%r)" % (path,))
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node = self.tfs.get_path(path)
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if node:
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raise EINVAL('Not a symlink') # nothing in tahoe is a symlink
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else:
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raise ENOENT('Invalid argument')
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@logexc
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def unlink(self, path):
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self.log("unlink(%r)" % (path,))
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self.tfs.unlink(path)
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@logexc
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def rmdir(self, path):
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self.log("rmdir(%r)" % (path,))
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self.tfs.unlink(path)
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@logexc
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def symlink(self, path, path1):
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self.log("symlink(%r, %r)" % (path, path1))
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self.tfs.link(path, path1)
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@logexc
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def rename(self, path, path1):
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self.log("rename(%r, %r)" % (path, path1))
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self.tfs.rename(path, path1)
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@logexc
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def link(self, path, path1):
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self.log("link(%r, %r)" % (path, path1))
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self.tfs.link(path, path1)
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@logexc
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def chmod(self, path, mode):
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self.log("XX chmod(%r, %r)" % (path, mode))
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#return -errno.EOPNOTSUPP
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@logexc
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def chown(self, path, user, group):
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self.log("XX chown(%r, %r, %r)" % (path, user, group))
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#return -errno.EOPNOTSUPP
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@logexc
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def truncate(self, path, len):
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self.log("XX truncate(%r, %r)" % (path, len))
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#return -errno.EOPNOTSUPP
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@logexc
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def utime(self, path, times):
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self.log("XX utime(%r, %r)" % (path, times))
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#return -errno.EOPNOTSUPP
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@logexc
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def statfs(self):
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self.log("statfs()")
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"""
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Should return an object with statvfs attributes (f_bsize, f_frsize...).
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Eg., the return value of os.statvfs() is such a thing (since py 2.2).
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If you are not reusing an existing statvfs object, start with
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fuse.StatVFS(), and define the attributes.
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To provide usable information (ie., you want sensible df(1)
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output, you are suggested to specify the following attributes:
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- f_bsize - preferred size of file blocks, in bytes
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- f_frsize - fundamental size of file blcoks, in bytes
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[if you have no idea, use the same as blocksize]
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- f_blocks - total number of blocks in the filesystem
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- f_bfree - number of free blocks
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- f_files - total number of file inodes
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- f_ffree - nunber of free file inodes
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"""
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block_size = 4096 # 4k
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preferred_block_size = 131072 # 128k, c.f. seg_size
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fs_size = 8*2**40 # 8Tb
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fs_free = 2*2**40 # 2Tb
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s = fuse.StatVfs(f_bsize = preferred_block_size,
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f_frsize = block_size,
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f_blocks = fs_size / block_size,
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f_bfree = fs_free / block_size,
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f_bavail = fs_free / block_size,
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f_files = 2**30, # total files
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f_ffree = 2**20, # available files
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f_favail = 2**20, # available files (root)
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f_flag = 2, # no suid
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f_namemax = 255) # max name length
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return s
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def fsinit(self):
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self.log("fsinit()")
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def main(self, *a, **kw):
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self.log("main(%r, %r)" % (a, kw))
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return fuse.Fuse.main(self, *a, **kw)
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##################################################################
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@logexc
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def readdir(self, path, offset):
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log('readdir(%r, %r)' % (path, offset))
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node = self.tfs.get_path(path)
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if node is None:
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return -errno.ENOENT
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dirlist = ['.', '..'] + node.children.keys()
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log('dirlist = %r' % (dirlist,))
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return [fuse.Direntry(d) for d in dirlist]
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@logexc
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def getattr(self, path):
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log('getattr(%r)' % (path,))
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if path == '/':
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# we don't have any metadata for the root (no edge leading to it)
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mode = (stat.S_IFDIR | 755)
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mtime = self.tfs.root.mtime
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s = TStat({}, st_mode=mode, st_nlink=1, st_mtime=mtime)
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log('getattr(%r) -> %r' % (path, s))
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return s
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parent, name, child = self.tfs.get_parent_name_and_child(path)
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if not child: # implicitly 'or not parent'
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raise ENOENT('No such file or directory')
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return parent.get_stat(name)
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@logexc
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def access(self, path, mode):
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self.log("access(%r, %r)" % (path, mode))
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node = self.tfs.get_path(path)
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if not node:
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return -errno.ENOENT
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accmode = os.O_RDONLY | os.O_WRONLY | os.O_RDWR
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if (mode & 0222):
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if not node.writable():
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log('write access denied for %s (req:%o)' % (path, mode, ))
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return -errno.EACCES
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#else:
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#log('access granted for %s' % (path, ))
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@logexc
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def mkdir(self, path, mode):
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self.log("mkdir(%r, %r)" % (path, mode))
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self.tfs.mkdir(path)
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def launch_tahoe_fuse(tfs, argv):
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sys.argv = ['tahoe fuse'] + list(argv)
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log('setting sys.argv=%r' % (sys.argv,))
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config = TahoeFuseOptions()
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server = TahoeFuse(tfs, version="%prog " +VERSIONSTR+", fuse "+ fuse.__version__,
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usage=config.getSynopsis(),
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dash_s_do='setsingle')
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server.parse(errex=1)
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server.main()
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def getnodeurl(nodedir):
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f = file(os.path.expanduser(os.path.join(nodedir, "node.url")), 'rb')
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nu = f.read().strip()
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f.close()
|
|
if nu[-1] != "/":
|
|
nu += "/"
|
|
return nu
|
|
|
|
def fingerprint(uri):
|
|
if uri is None:
|
|
return None
|
|
return base64.b32encode(sha.new(uri).digest()).lower()[:6]
|
|
|
|
class TStat(fuse.Stat):
|
|
# in fuse 0.2, these are set by fuse.Stat.__init__
|
|
# in fuse 0.2-pre3 (hardy) they are not. badness unsues if they're missing
|
|
st_mode = None
|
|
st_ino = 0
|
|
st_dev = 0
|
|
st_nlink = None
|
|
st_uid = 0
|
|
st_gid = 0
|
|
st_size = 0
|
|
st_atime = 0
|
|
st_mtime = 0
|
|
st_ctime = 0
|
|
|
|
fields = [ 'st_mode', 'st_ino', 'st_dev', 'st_nlink', 'st_uid', 'st_gid', 'st_size',
|
|
'st_atime', 'st_mtime', 'st_ctime', ]
|
|
def __init__(self, metadata, **kwargs):
|
|
# first load any stat fields present in 'metadata'
|
|
for st in [ 'mtime', 'ctime' ]:
|
|
if st in metadata:
|
|
setattr(self, "st_%s" % st, metadata[st])
|
|
for st in self.fields:
|
|
if st in metadata:
|
|
setattr(self, st, metadata[st])
|
|
|
|
# then set any values passed in as kwargs
|
|
fuse.Stat.__init__(self, **kwargs)
|
|
|
|
def __repr__(self):
|
|
d = {}
|
|
for f in self.fields:
|
|
d[f] = getattr(self, f, None)
|
|
return "<Stat%r>" % (d,)
|
|
|
|
class Directory(object):
|
|
def __init__(self, tfs, ro_uri, rw_uri):
|
|
self.tfs = tfs
|
|
self.ro_uri = ro_uri
|
|
self.rw_uri = rw_uri
|
|
assert (rw_uri or ro_uri)
|
|
self.children = {}
|
|
self.last_load = None
|
|
self.last_data = None
|
|
self.mtime = 0
|
|
|
|
def __repr__(self):
|
|
return "<Directory %s>" % (fingerprint(self.get_uri()),)
|
|
|
|
def maybe_refresh(self, name=None):
|
|
"""
|
|
if the previously cached data was retrieved within the cache
|
|
validity period, does nothing. otherwise refetches the data
|
|
for this directory and reloads itself
|
|
"""
|
|
now = time.time()
|
|
if self.last_load is None or (now - self.last_load) > self.tfs.cache_validity:
|
|
self.load(name)
|
|
|
|
def load(self, name=None):
|
|
now = time.time()
|
|
print 'loading', name or self
|
|
log('%s.loading(%s)' % (self, name))
|
|
url = self.tfs.compose_url("uri/%s?t=json", self.get_uri())
|
|
data = urllib.urlopen(url).read()
|
|
h = tagged_hash('cache_hash', data)
|
|
if h == self.last_data:
|
|
self.last_load = now
|
|
log('%s.load() : no change h(data)=%s' % (self, base32.b2a(h), ))
|
|
return
|
|
try:
|
|
parsed = simplejson.loads(data)
|
|
except ValueError:
|
|
log('%s.load(): unable to parse json data for dir:\n%r' % (self, data))
|
|
return
|
|
nodetype, d = parsed
|
|
assert nodetype == 'dirnode'
|
|
self.children.clear()
|
|
for cname,details in d['children'].items():
|
|
cname = unicode_to_utf8(cname)
|
|
ctype, cattrs = details
|
|
metadata = cattrs.get('metadata', {})
|
|
if ctype == 'dirnode':
|
|
cobj = self.tfs.dir_for(cname, cattrs.get('ro_uri'), cattrs.get('rw_uri'))
|
|
else:
|
|
assert ctype == "filenode"
|
|
cobj = File(cattrs.get('size'), cattrs.get('ro_uri'))
|
|
self.children[cname] = cobj, metadata
|
|
self.last_load = now
|
|
self.last_data = h
|
|
self.mtime = now
|
|
log('%s.load() loaded: \n%s' % (self, self.pprint(),))
|
|
|
|
def get_children(self):
|
|
return self.children.keys()
|
|
|
|
def get_child(self, name):
|
|
return self.children[name][0]
|
|
|
|
def add_child(self, name, child, metadata):
|
|
log('%s.add_child(%r, %r, %r)' % (self, name, child, metadata, ))
|
|
self.children[name] = child, metadata
|
|
url = self.tfs.compose_url("uri/%s/%s?t=uri", self.get_uri(), name)
|
|
child_cap = do_http('PUT', url, child.get_uri())
|
|
# XXX [ ] TODO: push metadata to tahoe node
|
|
assert child_cap == child.get_uri()
|
|
self.mtime = time.time()
|
|
log('added child %r with %r to %r' % (name, child_cap, self))
|
|
|
|
def remove_child(self, name):
|
|
log('%s.remove_child(%r)' % (self, name, ))
|
|
del self.children[name]
|
|
url = self.tfs.compose_url("uri/%s/%s", self.get_uri(), name)
|
|
resp = do_http('DELETE', url)
|
|
self.mtime = time.time()
|
|
log('child (%s) removal yielded %r' % (name, resp,))
|
|
|
|
def get_uri(self):
|
|
return self.rw_uri or self.ro_uri
|
|
|
|
def writable(self):
|
|
return self.rw_uri and self.rw_uri != self.ro_uri
|
|
|
|
def pprint(self, prefix='', printed=None, suffix=''):
|
|
ret = []
|
|
if printed is None:
|
|
printed = set()
|
|
writable = self.writable() and '+' or ' '
|
|
if self in printed:
|
|
ret.append(" %s/%s ... <%s> : %s" % (prefix, writable, fingerprint(self.get_uri()), suffix, ))
|
|
else:
|
|
ret.append("[%s] %s/%s : %s" % (fingerprint(self.get_uri()), prefix, writable, suffix, ))
|
|
printed.add(self)
|
|
for name,(child,metadata) in sorted(self.children.items()):
|
|
ret.append(child.pprint(' ' * (len(prefix)+1)+name, printed, repr(metadata)))
|
|
return '\n'.join(ret)
|
|
|
|
def get_metadata(self, name):
|
|
return self.children[name][1]
|
|
|
|
def get_stat(self, name):
|
|
child,metadata = self.children[name]
|
|
log("%s.get_stat(%s) md: %r" % (self, name, metadata))
|
|
|
|
if isinstance(child, Directory):
|
|
child.maybe_refresh(name)
|
|
mode = metadata.get('st_mode') or (stat.S_IFDIR | 0755)
|
|
s = TStat(metadata, st_mode=mode, st_nlink=1, st_mtime=child.mtime)
|
|
else:
|
|
if hasattr(child, 'tmp_fname'):
|
|
s = os.stat(child.tmp_fname)
|
|
log("%s.get_stat(%s) returning local stat of tmp file" % (self, name, ))
|
|
else:
|
|
s = TStat(metadata,
|
|
st_nlink = 1,
|
|
st_size = child.size,
|
|
st_mode = metadata.get('st_mode') or (stat.S_IFREG | 0444),
|
|
st_mtime = metadata.get('mtime') or self.mtime,
|
|
)
|
|
return s
|
|
|
|
log("%s.get_stat(%s)->%s" % (self, name, s))
|
|
return s
|
|
|
|
class File(object):
|
|
def __init__(self, size, ro_uri):
|
|
self.size = size
|
|
if ro_uri:
|
|
ro_uri = str(ro_uri)
|
|
self.ro_uri = ro_uri
|
|
|
|
def __repr__(self):
|
|
return "<File %s>" % (fingerprint(self.ro_uri) or [self.tmp_fname],)
|
|
|
|
def pprint(self, prefix='', printed=None, suffix=''):
|
|
return " %s (%s) : %s" % (prefix, self.size, suffix, )
|
|
|
|
def get_uri(self):
|
|
return self.ro_uri
|
|
|
|
def writable(self):
|
|
return True
|
|
|
|
class TFS(object):
|
|
def __init__(self, nodedir, nodeurl, root_uri,
|
|
cache_validity_period=DEFAULT_DIRECTORY_VALIDITY):
|
|
self.cache_validity = cache_validity_period
|
|
self.nodeurl = nodeurl
|
|
self.root_uri = root_uri
|
|
self.dirs = {}
|
|
|
|
cachedir = os.path.expanduser(os.path.join(nodedir, '_cache'))
|
|
self.cache = FileCache(nodeurl, cachedir)
|
|
ro_uri = NewDirectoryURI.init_from_string(self.root_uri).get_readonly()
|
|
self.root = Directory(self, ro_uri, self.root_uri)
|
|
self.root.maybe_refresh('<root>')
|
|
|
|
def log(self, msg):
|
|
log("<TFS> %s" % (msg, ))
|
|
|
|
def pprint(self):
|
|
return self.root.pprint()
|
|
|
|
def compose_url(self, fmt, *args):
|
|
return self.nodeurl + (fmt % tuple(map(urllib.quote, args)))
|
|
|
|
def get_parent_name_and_child(self, path):
|
|
"""
|
|
find the parent dir node, name of child relative to that parent, and
|
|
child node within the TFS object space.
|
|
@returns: (parent, name, child) if the child is found
|
|
(parent, name, None) if the child is missing from the parent
|
|
(None, name, None) if the parent is not found
|
|
"""
|
|
if path == '/':
|
|
return
|
|
dirname, name = os.path.split(path)
|
|
parent = self.get_path(dirname)
|
|
if parent:
|
|
try:
|
|
child = parent.get_child(name)
|
|
return parent, name, child
|
|
except KeyError:
|
|
return parent, name, None
|
|
else:
|
|
return None, name, None
|
|
|
|
def get_path(self, path):
|
|
comps = path.strip('/').split('/')
|
|
if comps == ['']:
|
|
comps = []
|
|
cursor = self.root
|
|
c_name = '<root>'
|
|
for comp in comps:
|
|
if not isinstance(cursor, Directory):
|
|
self.log('path "%s" is not a dir' % (path,))
|
|
return None
|
|
cursor.maybe_refresh(c_name)
|
|
try:
|
|
cursor = cursor.get_child(comp)
|
|
c_name = comp
|
|
except KeyError:
|
|
self.log('path "%s" not found' % (path,))
|
|
return None
|
|
if isinstance(cursor, Directory):
|
|
cursor.maybe_refresh(c_name)
|
|
return cursor
|
|
|
|
def dir_for(self, name, ro_uri, rw_uri):
|
|
#self.log('dir_for(%s) [%s/%s]' % (name, fingerprint(ro_uri), fingerprint(rw_uri)))
|
|
if ro_uri:
|
|
ro_uri = str(ro_uri)
|
|
if rw_uri:
|
|
rw_uri = str(rw_uri)
|
|
uri = rw_uri or ro_uri
|
|
assert uri
|
|
dirobj = self.dirs.get(uri)
|
|
if not dirobj:
|
|
self.log('dir_for(%s) creating new Directory' % (name, ))
|
|
dirobj = Directory(self, ro_uri, rw_uri)
|
|
self.dirs[uri] = dirobj
|
|
return dirobj
|
|
|
|
def upload(self, fname):
|
|
self.log('upload(%r)' % (fname,))
|
|
fh = file(fname, 'rb')
|
|
url = self.compose_url("uri")
|
|
file_cap = do_http('PUT', url, fh)
|
|
self.log('uploaded to: %r' % (file_cap,))
|
|
return file_cap
|
|
|
|
def mkdir(self, path):
|
|
self.log('mkdir(%r)' % (path,))
|
|
parent, name, child = self.get_parent_name_and_child(path)
|
|
|
|
if child:
|
|
raise EEXIST('File exists: %s' % (name,))
|
|
if not parent:
|
|
raise ENOENT('No such file or directory: %s' % (path,))
|
|
|
|
url = self.compose_url("uri?t=mkdir")
|
|
new_dir_cap = do_http('PUT', url)
|
|
|
|
ro_uri = NewDirectoryURI.init_from_string(new_dir_cap).get_readonly()
|
|
child = Directory(self, ro_uri, new_dir_cap)
|
|
parent.add_child(name, child, {})
|
|
|
|
def rename(self, path, path1):
|
|
self.log('rename(%s, %s)' % (path, path1))
|
|
src_parent, src_name, src_child = self.get_parent_name_and_child(path)
|
|
dst_parent, dst_name, dst_child = self.get_parent_name_and_child(path1)
|
|
|
|
if not src_child or not dst_parent:
|
|
raise ENOENT('No such file or directory')
|
|
|
|
dst_parent.add_child(dst_name, src_child, {})
|
|
src_parent.remove_child(src_name)
|
|
|
|
def unlink(self, path):
|
|
parent, name, child = self.get_parent_name_and_child(path)
|
|
|
|
if child is None: # parent or child is missing
|
|
raise ENOENT('No such file or directory')
|
|
if not parent.writable():
|
|
raise EACCESS('Permission denied')
|
|
|
|
parent.remove_child(name)
|
|
|
|
def link(self, path, path1):
|
|
src = self.get_path(path)
|
|
dst_parent, dst_name, dst_child = self.get_parent_name_and_child(path1)
|
|
|
|
if not src:
|
|
raise ENOENT('No such file or directory')
|
|
if dst_parent is None:
|
|
raise ENOENT('No such file or directory')
|
|
if not dst_parent.writable():
|
|
raise EACCESS('Permission denied')
|
|
|
|
dst_parent.add_child(dst_name, src, {})
|
|
|
|
class FileCache(object):
|
|
def __init__(self, nodeurl, cachedir):
|
|
self.nodeurl = nodeurl
|
|
self.cachedir = cachedir
|
|
if not os.path.exists(self.cachedir):
|
|
os.makedirs(self.cachedir)
|
|
self.tmpdir = os.path.join(self.cachedir, 'tmp')
|
|
if not os.path.exists(self.tmpdir):
|
|
os.makedirs(self.tmpdir)
|
|
|
|
def log(self, msg):
|
|
log("<FC> %s" % (msg, ))
|
|
|
|
def get_file(self, uri):
|
|
self.log('get_file(%s)' % (uri,))
|
|
if uri.startswith("URI:LIT"):
|
|
return self.get_literal(uri)
|
|
else:
|
|
return self.get_chk(uri)
|
|
|
|
def get_literal(self, uri):
|
|
h = sha.new(uri).digest()
|
|
u = LiteralFileURI.init_from_string(uri)
|
|
fname = os.path.join(self.cachedir, '__'+base64.b32encode(h).lower())
|
|
size = len(u.data)
|
|
self.log('writing literal file %s (%s)' % (fname, size, ))
|
|
fh = open(fname, 'wb')
|
|
fh.write(u.data)
|
|
fh.close()
|
|
return fname
|
|
|
|
def get_chk(self, uri):
|
|
u = CHKFileURI.init_from_string(str(uri))
|
|
storage_index = u.storage_index
|
|
size = u.size
|
|
fname = os.path.join(self.cachedir, base64.b32encode(storage_index).lower())
|
|
if os.path.exists(fname):
|
|
fsize = os.path.getsize(fname)
|
|
if fsize == size:
|
|
return fname
|
|
else:
|
|
self.log('warning file "%s" is too short %s < %s' % (fname, fsize, size))
|
|
self.log('downloading file %s (%s)' % (fname, size, ))
|
|
fh = open(fname, 'wb')
|
|
url = "%suri/%s" % (self.nodeurl, uri)
|
|
download = urllib.urlopen(''.join([ self.nodeurl, "uri/", uri ]))
|
|
while True:
|
|
chunk = download.read(4096)
|
|
if not chunk:
|
|
break
|
|
fh.write(chunk)
|
|
fh.close()
|
|
return fname
|
|
|
|
def tmp_file(self, id):
|
|
fname = os.path.join(self.tmpdir, base64.b32encode(id).lower())
|
|
return fname
|
|
|
|
_tfs = None # to appease pyflakes; is set in main()
|
|
def print_tree():
|
|
log('tree:\n' + _tfs.pprint())
|
|
|
|
def main(argv):
|
|
log("\n\nmain(%s)" % (argv,))
|
|
|
|
if not argv:
|
|
argv = ['--help']
|
|
if len(argv) == 1 and argv[0] in ['-h', '--help', '--version']:
|
|
config = TahoeFuseOptions()
|
|
print >> sys.stderr, config
|
|
print >> sys.stderr, 'fuse usage follows:'
|
|
launch_tahoe_fuse(None, argv)
|
|
return -2
|
|
|
|
config = TahoeFuseOptions()
|
|
try:
|
|
#print 'parsing', argv
|
|
config.parseOptions(argv)
|
|
except usage.error, e:
|
|
print config
|
|
print e
|
|
return -1
|
|
|
|
if config['alias']:
|
|
alias = config['alias']
|
|
#print 'looking for aliases in', config['node-directory']
|
|
aliases = get_aliases(os.path.expanduser(config['node-directory']))
|
|
if alias not in aliases:
|
|
raise usage.error('Alias %r not found' % (alias,))
|
|
root_uri = aliases[alias]
|
|
elif config['root-uri']:
|
|
root_uri = config['root-uri']
|
|
alias = 'root-uri'
|
|
# test the uri for structural validity:
|
|
try:
|
|
NewDirectoryURI.init_from_string(root_uri)
|
|
except:
|
|
raise usage.error('root-uri must be a valid directory uri (not %r)' % (root_uri,))
|
|
else:
|
|
raise usage.error('At least one of --alias or --root-uri must be specified')
|
|
|
|
|
|
nodedir = config['node-directory']
|
|
nodeurl = config['node-url']
|
|
if not nodeurl:
|
|
nodeurl = getnodeurl(nodedir)
|
|
|
|
# switch to named log file.
|
|
global logfile
|
|
fname = 'tfuse.%s.log' % (alias,)
|
|
log('switching to %s' % (fname,))
|
|
logfile.close()
|
|
logfile = file(fname, 'ab')
|
|
log('\n'+(24*'_')+'init'+(24*'_')+'\n')
|
|
|
|
if not os.path.exists(config.mountpoint):
|
|
raise OSError(2, 'No such file or directory: "%s"' % (config.mountpoint,))
|
|
|
|
cache_timeout = float(config['cache-timeout'])
|
|
tfs = TFS(nodedir, nodeurl, root_uri, cache_timeout)
|
|
print tfs.pprint()
|
|
|
|
# make tfs instance accesible to print_tree() for dbg
|
|
global _tfs
|
|
_tfs = tfs
|
|
|
|
args = [ '-o'+opt for opt in config.fuse_options ] + [config.mountpoint]
|
|
launch_tahoe_fuse(tfs, args)
|
|
|
|
if __name__ == '__main__':
|
|
sys.exit(main(sys.argv[1:]))
|