mirror of
https://github.com/tahoe-lafs/tahoe-lafs.git
synced 2024-12-20 05:28:04 +00:00
abae0345ad
a typo in the 'flags2mode' code would wind up passing the O_APPEND flag into the os open() call, which would cause the file to be opened in 'strict append' mode, i.e. all writes extend the file, regardless of calls to seek. this causes a problem for tahoefuse in that the seek() calls made to filehandles open through fuse would be ignored when write()s occurred. this was evidenced by corruption seen when using rsync. it turns out that rsync actually makes overlapping writes in some cases, i.e. even when writing a new fresh file out, it still doesn't write a simple contiguous span of data, but will make writes overlapping data already written. this is probably related to the way it manages data blocks internally for rolling checksums etc. at any rate, this bug would thus cause rsync in those cases to write a chunk of duplicate data into the file - leading to tahoe securely and reliably storing the wrong data. fixing this, so that non-append file opens do not pass O_APPEND seems to eliminate this problem.
861 lines
28 KiB
Python
861 lines
28 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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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 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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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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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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server = TahoeFuse(tfs, version="%prog " + fuse.__version__,
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usage=USAGE,
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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 getbasedir(cap_name='root_dir'):
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fname = os.path.expanduser("~/.tahoe/private/%s.cap" % (cap_name,))
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if os.path.exists(fname):
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f = file(fname, 'rb')
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bd = f.read().strip()
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f.close()
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return bd
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else:
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return None
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def getnodeurl():
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f = file(os.path.expanduser("~/.tahoe/node.url"), 'rb')
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nu = f.read().strip()
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f.close()
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if nu[-1] != "/":
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nu += "/"
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return nu
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def fingerprint(uri):
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if uri is None:
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return None
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return base64.b32encode(sha.new(uri).digest()).lower()[:6]
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class TStat(fuse.Stat):
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fields = [ 'st_mode', 'st_ino', 'st_dev', 'st_nlink', 'st_uid', 'st_gid', 'st_size',
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'st_atime', 'st_mtime', 'st_ctime', ]
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def __init__(self, metadata, **kwargs):
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# first load any stat fields present in 'metadata'
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for st in [ 'mtime', 'ctime' ]:
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if st in metadata:
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setattr(self, "st_%s" % st, metadata[st])
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for st in self.fields:
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if st in metadata:
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setattr(self, st, metadata[st])
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# then set any values passed in as kwargs
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fuse.Stat.__init__(self, **kwargs)
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def __repr__(self):
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return "<Stat%r>" % {
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'st_mode': self.st_mode,
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'st_ino': self.st_ino,
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'st_dev': self.st_dev,
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'st_nlink': self.st_nlink,
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'st_uid': self.st_uid,
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'st_gid': self.st_gid,
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'st_size': self.st_size,
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'st_atime': self.st_atime,
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'st_mtime': self.st_mtime,
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'st_ctime': self.st_ctime,
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}
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class Directory(object):
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def __init__(self, tfs, ro_uri, rw_uri):
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self.tfs = tfs
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self.ro_uri = ro_uri
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self.rw_uri = rw_uri
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assert (rw_uri or ro_uri)
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self.children = {}
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self.last_load = None
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|
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, 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 = {}
|
|
|
|
self.cache = FileCache(nodeurl, os.path.expanduser('~/.tahoe/_cache'))
|
|
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']:
|
|
launch_tahoe_fuse(None, argv)
|
|
return -2
|
|
|
|
if not argv[0].startswith('-') and len(argv) > 1:
|
|
cap_name = argv[0]
|
|
basedir = getbasedir(cap_name)
|
|
if basedir is None:
|
|
print 'root dir named "%s" not found.' % (cap_name,)
|
|
return -2
|
|
argv = argv[1:]
|
|
else:
|
|
basedir = getbasedir() # default 'root_dir'
|
|
cap_name = 'root_dir'
|
|
|
|
# switch to named log file.
|
|
global logfile
|
|
fname = 'tfuse.%s.log' % (cap_name,)
|
|
log('switching to %s' % (fname,))
|
|
logfile.close()
|
|
logfile = file(fname, 'ab')
|
|
|
|
if argv[-1].startswith('-'):
|
|
print 'mountpoint not given'
|
|
return -2
|
|
mountpoint = os.path.abspath(argv[-1])
|
|
if not os.path.exists(mountpoint):
|
|
#raise OSError(2, 'No such file or directory: "%s"' % (mountpoint,))
|
|
print 'No such file or directory: "%s"' % (mountpoint,)
|
|
return -2
|
|
|
|
nodeurl = getnodeurl()
|
|
|
|
tfs = TFS(nodeurl, basedir)
|
|
print tfs.pprint()
|
|
|
|
# make tfs instance accesible to print_tree() for dbg
|
|
global _tfs
|
|
_tfs = tfs
|
|
|
|
launch_tahoe_fuse(tfs, argv)
|
|
|
|
if __name__ == '__main__':
|
|
main(sys.argv[1:])
|