From: nejucomo Date: Sat, 7 Jun 2008 05:22:36 +0000 (-0700) Subject: fuse: impl_b: Add impl_b to the contrib directory. X-Git-Tag: allmydata-tahoe-1.1.0~41 X-Git-Url: https://git.rkrishnan.org/specifications/-?a=commitdiff_plain;h=2fa5785960d7d913c5575be4d7dfd755fe4e44ab;p=tahoe-lafs%2Ftahoe-lafs.git fuse: impl_b: Add impl_b to the contrib directory. --- diff --git a/contrib/fuse/impl_b/pyfuse/OrderedDict.py b/contrib/fuse/impl_b/pyfuse/OrderedDict.py new file mode 100644 index 00000000..6fe5287e --- /dev/null +++ b/contrib/fuse/impl_b/pyfuse/OrderedDict.py @@ -0,0 +1,84 @@ +from UserDict import DictMixin + + +DELETED = object() + + +class OrderedDict(DictMixin): + + def __init__(self, *args, **kwds): + self.clear() + self.update(*args, **kwds) + + def clear(self): + self._keys = [] + self._content = {} # {key: (index, value)} + self._deleted = 0 + + def copy(self): + return OrderedDict(self) + + def __iter__(self): + for key in self._keys: + if key is not DELETED: + yield key + + def keys(self): + return [key for key in self._keys if key is not DELETED] + + def popitem(self): + while 1: + try: + k = self._keys.pop() + except IndexError: + raise KeyError, 'OrderedDict is empty' + if k is not DELETED: + return k, self._content.pop(k)[1] + + def __getitem__(self, key): + index, value = self._content[key] + return value + + def __setitem__(self, key, value): + try: + index, oldvalue = self._content[key] + except KeyError: + index = len(self._keys) + self._keys.append(key) + self._content[key] = index, value + + def __delitem__(self, key): + index, oldvalue = self._content.pop(key) + self._keys[index] = DELETED + if self._deleted <= len(self._content): + self._deleted += 1 + else: + # compress + newkeys = [] + for k in self._keys: + if k is not DELETED: + i, value = self._content[k] + self._content[k] = len(newkeys), value + newkeys.append(k) + self._keys = newkeys + self._deleted = 0 + + def __len__(self): + return len(self._content) + + def __repr__(self): + res = ['%r: %r' % (key, self._content[key][1]) for key in self] + return 'OrderedDict(%s)' % (', '.join(res),) + + def __cmp__(self, other): + if not isinstance(other, OrderedDict): + return NotImplemented + keys = self.keys() + r = cmp(keys, other.keys()) + if r: + return r + for k in keys: + r = cmp(self[k], other[k]) + if r: + return r + return 0 diff --git a/contrib/fuse/impl_b/pyfuse/__init__.py b/contrib/fuse/impl_b/pyfuse/__init__.py new file mode 100644 index 00000000..e69de29b diff --git a/contrib/fuse/impl_b/pyfuse/cachefs.py b/contrib/fuse/impl_b/pyfuse/cachefs.py new file mode 100644 index 00000000..f9b13c21 --- /dev/null +++ b/contrib/fuse/impl_b/pyfuse/cachefs.py @@ -0,0 +1,281 @@ +import os, stat, py, select +import inspect +from objectfs import ObjectFs + + +BLOCKSIZE = 8192 + + +def remote_runner(BLOCKSIZE): + import sys, select, os, struct + stream = None + while True: + while stream is not None: + iwtd, owtd, ewtd = select.select([0], [1], []) + if iwtd: + break + pos = stream.tell() + data = stream.read(BLOCKSIZE) + res = ('R', path, pos, len(data)) + sys.stdout.write('%r\n%s' % (res, data)) + if len(data) < BLOCKSIZE: + stream = None + + stream = None + msg = eval(sys.stdin.readline()) + if msg[0] == 'L': + path = msg[1] + names = os.listdir(path) + res = [] + for name in names: + try: + st = os.stat(os.path.join(path, name)) + except OSError: + continue + res.append((name, st.st_mode, st.st_size)) + res = msg + (res,) + sys.stdout.write('%s\n' % (res,)) + elif msg[0] == 'R': + path, pos = msg[1:] + f = open(path, 'rb') + f.seek(pos) + data = f.read(BLOCKSIZE) + res = msg + (len(data),) + sys.stdout.write('%r\n%s' % (res, data)) + elif msg[0] == 'S': + path, pos = msg[1:] + stream = open(path, 'rb') + stream.seek(pos) + #elif msg[0] == 'C': + # stream = None + + +class CacheFs(ObjectFs): + MOUNT_OPTIONS = {'max_read': BLOCKSIZE} + + def __init__(self, localdir, remotehost, remotedir): + src = inspect.getsource(remote_runner) + src += '\n\nremote_runner(%d)\n' % BLOCKSIZE + + remotecmd = 'python -u -c "exec input()"' + cmdline = [remotehost, remotecmd] + # XXX Unix style quoting + for i in range(len(cmdline)): + cmdline[i] = "'" + cmdline[i].replace("'", "'\\''") + "'" + cmd = 'ssh -C' + cmdline.insert(0, cmd) + + child_in, child_out = os.popen2(' '.join(cmdline), bufsize=0) + child_in.write('%r\n' % (src,)) + + control = Controller(child_in, child_out) + ObjectFs.__init__(self, CacheDir(localdir, remotedir, control)) + + +class Controller: + def __init__(self, child_in, child_out): + self.child_in = child_in + self.child_out = child_out + self.cache = {} + self.streaming = None + + def next_answer(self): + answer = eval(self.child_out.readline()) + #print 'A', answer + if answer[0] == 'R': + remotefn, pos, length = answer[1:] + data = self.child_out.read(length) + self.cache[remotefn, pos] = data + return answer + + def wait_answer(self, query): + self.streaming = None + #print 'Q', query + self.child_in.write('%r\n' % (query,)) + while True: + answer = self.next_answer() + if answer[:len(query)] == query: + return answer[len(query):] + + def listdir(self, remotedir): + query = ('L', remotedir) + res, = self.wait_answer(query) + return res + + def wait_for_block(self, remotefn, pos): + key = remotefn, pos + while key not in self.cache: + self.next_answer() + return self.cache[key] + + def peek_for_block(self, remotefn, pos): + key = remotefn, pos + while key not in self.cache: + iwtd, owtd, ewtd = select.select([self.child_out], [], [], 0) + if not iwtd: + return None + self.next_answer() + return self.cache[key] + + def cached_block(self, remotefn, pos): + key = remotefn, pos + return self.cache.get(key) + + def start_streaming(self, remotefn, pos): + if remotefn != self.streaming: + while (remotefn, pos) in self.cache: + pos += BLOCKSIZE + query = ('S', remotefn, pos) + #print 'Q', query + self.child_in.write('%r\n' % (query,)) + self.streaming = remotefn + + def read_blocks(self, remotefn, poslist): + lst = ['%r\n' % (('R', remotefn, pos),) + for pos in poslist if (remotefn, pos) not in self.cache] + if lst: + self.streaming = None + #print 'Q', '+ '.join(lst) + self.child_in.write(''.join(lst)) + + def clear_cache(self, remotefn): + for key in self.cache.keys(): + if key[0] == remotefn: + del self.cache[key] + + +class CacheDir: + def __init__(self, localdir, remotedir, control, size=0): + self.localdir = localdir + self.remotedir = remotedir + self.control = control + self.entries = None + def listdir(self): + if self.entries is None: + self.entries = [] + for name, st_mode, st_size in self.control.listdir(self.remotedir): + if stat.S_ISDIR(st_mode): + cls = CacheDir + else: + cls = CacheFile + obj = cls(os.path.join(self.localdir, name), + os.path.join(self.remotedir, name), + self.control, + st_size) + self.entries.append((name, obj)) + return self.entries + +class CacheFile: + def __init__(self, localfn, remotefn, control, size): + self.localfn = localfn + self.remotefn = remotefn + self.control = control + self.st_size = size + + def size(self): + return self.st_size + + def read(self): + try: + st = os.stat(self.localfn) + except OSError: + pass + else: + if st.st_size == self.st_size: # fully cached + return open(self.localfn, 'rb') + os.unlink(self.localfn) + lpath = py.path.local(self.partial()) + lpath.ensure(file=1) + f = open(self.partial(), 'r+b') + return DumpFile(self, f) + + def partial(self): + return self.localfn + '.partial~' + + def complete(self): + try: + os.rename(self.partial(), self.localfn) + except OSError: + pass + + +class DumpFile: + + def __init__(self, cf, f): + self.cf = cf + self.f = f + self.pos = 0 + + def seek(self, npos): + self.pos = npos + + def read(self, count): + control = self.cf.control + self.f.seek(self.pos) + buffer = self.f.read(count) + self.pos += len(buffer) + count -= len(buffer) + + self.f.seek(0, 2) + curend = self.f.tell() + + if count > 0: + + while self.pos > curend: + curend &= -BLOCKSIZE + data = control.peek_for_block(self.cf.remotefn, curend) + if data is None: + break + self.f.seek(curend) + self.f.write(data) + curend += len(data) + if len(data) < BLOCKSIZE: + break + + start = max(self.pos, curend) & (-BLOCKSIZE) + end = (self.pos + count + BLOCKSIZE-1) & (-BLOCKSIZE) + poslist = range(start, end, BLOCKSIZE) + + if self.pos <= curend: + control.start_streaming(self.cf.remotefn, start) + self.f.seek(start) + for p in poslist: + data = control.wait_for_block(self.cf.remotefn, p) + assert self.f.tell() == p + self.f.write(data) + if len(data) < BLOCKSIZE: + break + + curend = self.f.tell() + while curend < self.cf.st_size: + curend &= -BLOCKSIZE + data = control.cached_block(self.cf.remotefn, curend) + if data is None: + break + assert self.f.tell() == curend + self.f.write(data) + curend += len(data) + else: + self.cf.complete() + control.clear_cache(self.cf.remotefn) + + self.f.seek(self.pos) + buffer += self.f.read(count) + + else: + control.read_blocks(self.cf.remotefn, poslist) + result = [] + for p in poslist: + data = control.wait_for_block(self.cf.remotefn, p) + result.append(data) + if len(data) < BLOCKSIZE: + break + data = ''.join(result) + buffer += data[self.pos-start:self.pos-start+count] + + else: + if self.pos + 60000 > curend: + curend &= -BLOCKSIZE + control.start_streaming(self.cf.remotefn, curend) + + return buffer diff --git a/contrib/fuse/impl_b/pyfuse/greenhandler.py b/contrib/fuse/impl_b/pyfuse/greenhandler.py new file mode 100644 index 00000000..aa10f3c7 --- /dev/null +++ b/contrib/fuse/impl_b/pyfuse/greenhandler.py @@ -0,0 +1,71 @@ +import sys, os, Queue, atexit + +dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__))) +dir = os.path.join(dir, 'pypeers') +if dir not in sys.path: + sys.path.append(dir) +del dir + +from greensock import * +import threadchannel + + +def _read_from_kernel(handler): + while True: + msg = read(handler.fd, handler.MAX_READ) + if not msg: + print >> sys.stderr, "out-kernel connexion closed" + break + autogreenlet(handler.handle_message, msg) + +def add_handler(handler): + autogreenlet(_read_from_kernel, handler) + atexit.register(handler.close) + +# ____________________________________________________________ + +THREAD_QUEUE = None + +def thread_runner(n): + while True: + #print 'thread runner %d waiting' % n + operation, answer = THREAD_QUEUE.get() + #print 'thread_runner %d: %r' % (n, operation) + try: + res = True, operation() + except Exception: + res = False, sys.exc_info() + #print 'thread_runner %d: got %d bytes' % (n, len(res or '')) + answer.send(res) + + +def start_bkgnd_thread(): + global THREAD_QUEUE, THREAD_LOCK + import thread + threadchannel.startup() + THREAD_LOCK = thread.allocate_lock() + THREAD_QUEUE = Queue.Queue() + for i in range(4): + thread.start_new_thread(thread_runner, (i,)) + +def wget(*args, **kwds): + from wget import wget + + def operation(): + kwds['unlock'] = THREAD_LOCK + THREAD_LOCK.acquire() + try: + return wget(*args, **kwds) + finally: + THREAD_LOCK.release() + + if THREAD_QUEUE is None: + start_bkgnd_thread() + answer = threadchannel.ThreadChannel() + THREAD_QUEUE.put((operation, answer)) + ok, res = answer.receive() + if not ok: + typ, value, tb = res + raise typ, value, tb + #print 'wget returns %d bytes' % (len(res or ''),) + return res diff --git a/contrib/fuse/impl_b/pyfuse/handler.py b/contrib/fuse/impl_b/pyfuse/handler.py new file mode 100644 index 00000000..f5c8e65d --- /dev/null +++ b/contrib/fuse/impl_b/pyfuse/handler.py @@ -0,0 +1,377 @@ +from kernel import * +import os, errno, sys, stat + +def fuse_mount(mountpoint, opts=None): + if not isinstance(mountpoint, str): + raise TypeError + if opts is not None and not isinstance(opts, str): + raise TypeError + import dl + fuse = dl.open('libfuse.so') + if fuse.sym('fuse_mount_compat22'): + fnname = 'fuse_mount_compat22' + else: + fnname = 'fuse_mount' # older versions of libfuse.so + return fuse.call(fnname, mountpoint, opts) + +class Handler(object): + __system = os.system + mountpoint = fd = None + __in_header_size = fuse_in_header.calcsize() + __out_header_size = fuse_out_header.calcsize() + MAX_READ = FUSE_MAX_IN + + def __init__(self, mountpoint, filesystem, logfile='STDERR', **opts1): + opts = getattr(filesystem, 'MOUNT_OPTIONS', {}).copy() + opts.update(opts1) + if opts: + opts = opts.items() + opts.sort() + opts = ' '.join(['%s=%s' % item for item in opts]) + else: + opts = None + fd = fuse_mount(mountpoint, opts) + if fd < 0: + raise IOError("mount failed") + self.fd = fd + if logfile == 'STDERR': + logfile = sys.stderr + self.logfile = logfile + if self.logfile: + print >> self.logfile, '* mounted at', mountpoint + self.mountpoint = mountpoint + self.filesystem = filesystem + self.handles = {} + self.nexth = 1 + + def __del__(self): + if self.fd is not None: + os.close(self.fd) + self.fd = None + if self.mountpoint: + cmd = "fusermount -u '%s'" % self.mountpoint.replace("'", r"'\''") + self.mountpoint = None + if self.logfile: + print >> self.logfile, '*', cmd + self.__system(cmd) + + close = __del__ + + def loop_forever(self): + while True: + msg = os.read(self.fd, FUSE_MAX_IN) + if not msg: + raise EOFError("out-kernel connection closed") + self.handle_message(msg) + + def handle_message(self, msg): + headersize = self.__in_header_size + req = fuse_in_header(msg[:headersize]) + assert req.len == len(msg) + name = req.opcode + try: + try: + name = fuse_opcode2name[req.opcode] + meth = getattr(self, name) + except (IndexError, AttributeError): + raise NotImplementedError + #if self.logfile: + # print >> self.logfile, '%s(%d)' % (name, req.nodeid) + reply = meth(req, msg[headersize:]) + #if self.logfile: + # print >> self.logfile, ' >>', repr(reply) + except NotImplementedError: + if self.logfile: + print >> self.logfile, '%s: not implemented' % (name,) + self.send_reply(req, err=errno.ENOSYS) + except EnvironmentError, e: + if self.logfile: + print >> self.logfile, '%s: %s' % (name, e) + self.send_reply(req, err = e.errno or errno.ESTALE) + except NoReply: + pass + else: + self.send_reply(req, reply) + + def send_reply(self, req, reply=None, err=0): + assert 0 <= err < 1000 + if reply is None: + reply = '' + elif not isinstance(reply, str): + reply = reply.pack() + f = fuse_out_header(unique = req.unique, + error = -err, + len = self.__out_header_size + len(reply)) + data = f.pack() + reply + while data: + count = os.write(self.fd, data) + if not count: + raise EOFError("in-kernel connection closed") + data = data[count:] + + def notsupp_or_ro(self): + if hasattr(self.filesystem, "modified"): + raise IOError(errno.ENOSYS, "not supported") + else: + raise IOError(errno.EROFS, "read-only file system") + + # ____________________________________________________________ + + def FUSE_INIT(self, req, msg): + msg = fuse_init_in_out(msg[:8]) + if self.logfile: + print >> self.logfile, 'INIT: %d.%d' % (msg.major, msg.minor) + return fuse_init_in_out(major = FUSE_KERNEL_VERSION, + minor = FUSE_KERNEL_MINOR_VERSION) + + def FUSE_GETATTR(self, req, msg): + node = self.filesystem.getnode(req.nodeid) + attr, valid = self.filesystem.getattr(node) + return fuse_attr_out(attr_valid = valid, + attr = attr) + + def FUSE_SETATTR(self, req, msg): + if not hasattr(self.filesystem, 'setattr'): + self.notsupp_or_ro() + msg = fuse_setattr_in(msg) + if msg.valid & FATTR_MODE: mode = msg.attr.mode & 0777 + else: mode = None + if msg.valid & FATTR_UID: uid = msg.attr.uid + else: uid = None + if msg.valid & FATTR_GID: gid = msg.attr.gid + else: gid = None + if msg.valid & FATTR_SIZE: size = msg.attr.size + else: size = None + if msg.valid & FATTR_ATIME: atime = msg.attr.atime + else: atime = None + if msg.valid & FATTR_MTIME: mtime = msg.attr.mtime + else: mtime = None + node = self.filesystem.getnode(req.nodeid) + self.filesystem.setattr(node, mode, uid, gid, + size, atime, mtime) + attr, valid = self.filesystem.getattr(node) + return fuse_attr_out(attr_valid = valid, + attr = attr) + + def FUSE_RELEASE(self, req, msg): + msg = fuse_release_in(msg, truncate=True) + try: + del self.handles[msg.fh] + except KeyError: + raise IOError(errno.EBADF, msg.fh) + FUSE_RELEASEDIR = FUSE_RELEASE + + def FUSE_OPENDIR(self, req, msg): + #msg = fuse_open_in(msg) + node = self.filesystem.getnode(req.nodeid) + attr, valid = self.filesystem.getattr(node) + if mode2type(attr.mode) != TYPE_DIR: + raise IOError(errno.ENOTDIR, node) + fh = self.nexth + self.nexth += 1 + self.handles[fh] = True, '', node + return fuse_open_out(fh = fh) + + def FUSE_READDIR(self, req, msg): + msg = fuse_read_in(msg) + try: + isdir, data, node = self.handles[msg.fh] + if not isdir: + raise KeyError # not a dir handle + except KeyError: + raise IOError(errno.EBADF, msg.fh) + if msg.offset == 0: + # start or rewind + d_entries = [] + off = 0 + for name, type in self.filesystem.listdir(node): + off += fuse_dirent.calcsize(len(name)) + d_entry = fuse_dirent(ino = INVALID_INO, + off = off, + type = type, + name = name) + d_entries.append(d_entry) + data = ''.join([d.pack() for d in d_entries]) + self.handles[msg.fh] = True, data, node + return data[msg.offset:msg.offset+msg.size] + + def replyentry(self, (subnodeid, valid1)): + subnode = self.filesystem.getnode(subnodeid) + attr, valid2 = self.filesystem.getattr(subnode) + return fuse_entry_out(nodeid = subnodeid, + entry_valid = valid1, + attr_valid = valid2, + attr = attr) + + def FUSE_LOOKUP(self, req, msg): + filename = c2pystr(msg) + dirnode = self.filesystem.getnode(req.nodeid) + return self.replyentry(self.filesystem.lookup(dirnode, filename)) + + def FUSE_OPEN(self, req, msg, mask=os.O_RDONLY|os.O_WRONLY|os.O_RDWR): + msg = fuse_open_in(msg) + node = self.filesystem.getnode(req.nodeid) + attr, valid = self.filesystem.getattr(node) + if mode2type(attr.mode) != TYPE_REG: + raise IOError(errno.EPERM, node) + f = self.filesystem.open(node, msg.flags & mask) + if isinstance(f, tuple): + f, open_flags = f + else: + open_flags = 0 + fh = self.nexth + self.nexth += 1 + self.handles[fh] = False, f, node + return fuse_open_out(fh = fh, open_flags = open_flags) + + def FUSE_READ(self, req, msg): + msg = fuse_read_in(msg) + try: + isdir, f, node = self.handles[msg.fh] + if isdir: + raise KeyError + except KeyError: + raise IOError(errno.EBADF, msg.fh) + f.seek(msg.offset) + return f.read(msg.size) + + def FUSE_WRITE(self, req, msg): + if not hasattr(self.filesystem, 'modified'): + raise IOError(errno.EROFS, "read-only file system") + msg, data = fuse_write_in.from_head(msg) + try: + isdir, f, node = self.handles[msg.fh] + if isdir: + raise KeyError + except KeyError: + raise IOError(errno.EBADF, msg.fh) + f.seek(msg.offset) + f.write(data) + self.filesystem.modified(node) + return fuse_write_out(size = len(data)) + + def FUSE_MKNOD(self, req, msg): + if not hasattr(self.filesystem, 'mknod'): + self.notsupp_or_ro() + msg, filename = fuse_mknod_in.from_param(msg) + node = self.filesystem.getnode(req.nodeid) + return self.replyentry(self.filesystem.mknod(node, filename, msg.mode)) + + def FUSE_MKDIR(self, req, msg): + if not hasattr(self.filesystem, 'mkdir'): + self.notsupp_or_ro() + msg, filename = fuse_mkdir_in.from_param(msg) + node = self.filesystem.getnode(req.nodeid) + return self.replyentry(self.filesystem.mkdir(node, filename, msg.mode)) + + def FUSE_SYMLINK(self, req, msg): + if not hasattr(self.filesystem, 'symlink'): + self.notsupp_or_ro() + linkname, target = c2pystr2(msg) + node = self.filesystem.getnode(req.nodeid) + return self.replyentry(self.filesystem.symlink(node, linkname, target)) + + #def FUSE_LINK(self, req, msg): + # ... + + def FUSE_UNLINK(self, req, msg): + if not hasattr(self.filesystem, 'unlink'): + self.notsupp_or_ro() + filename = c2pystr(msg) + node = self.filesystem.getnode(req.nodeid) + self.filesystem.unlink(node, filename) + + def FUSE_RMDIR(self, req, msg): + if not hasattr(self.filesystem, 'rmdir'): + self.notsupp_or_ro() + dirname = c2pystr(msg) + node = self.filesystem.getnode(req.nodeid) + self.filesystem.rmdir(node, dirname) + + def FUSE_FORGET(self, req, msg): + if hasattr(self.filesystem, 'forget'): + self.filesystem.forget(req.nodeid) + raise NoReply + + def FUSE_READLINK(self, req, msg): + if not hasattr(self.filesystem, 'readlink'): + raise IOError(errno.ENOSYS, "readlink not supported") + node = self.filesystem.getnode(req.nodeid) + target = self.filesystem.readlink(node) + return target + + def FUSE_RENAME(self, req, msg): + if not hasattr(self.filesystem, 'rename'): + self.notsupp_or_ro() + msg, oldname, newname = fuse_rename_in.from_param2(msg) + oldnode = self.filesystem.getnode(req.nodeid) + newnode = self.filesystem.getnode(msg.newdir) + self.filesystem.rename(oldnode, oldname, newnode, newname) + + def getxattrs(self, nodeid): + if not hasattr(self.filesystem, 'getxattrs'): + raise IOError(errno.ENOSYS, "xattrs not supported") + node = self.filesystem.getnode(nodeid) + return self.filesystem.getxattrs(node) + + def FUSE_LISTXATTR(self, req, msg): + names = self.getxattrs(req.nodeid).keys() + names = ['user.' + name for name in names] + totalsize = 0 + for name in names: + totalsize += len(name)+1 + msg = fuse_getxattr_in(msg) + if msg.size > 0: + if msg.size < totalsize: + raise IOError(errno.ERANGE, "buffer too small") + names.append('') + return '\x00'.join(names) + else: + return fuse_getxattr_out(size=totalsize) + + def FUSE_GETXATTR(self, req, msg): + xattrs = self.getxattrs(req.nodeid) + msg, name = fuse_getxattr_in.from_param(msg) + if not name.startswith('user.'): # ENODATA == ENOATTR + raise IOError(errno.ENODATA, "only supports 'user.' xattrs, " + "got %r" % (name,)) + name = name[5:] + try: + value = xattrs[name] + except KeyError: + raise IOError(errno.ENODATA, "no such xattr") # == ENOATTR + value = str(value) + if msg.size > 0: + if msg.size < len(value): + raise IOError(errno.ERANGE, "buffer too small") + return value + else: + return fuse_getxattr_out(size=len(value)) + + def FUSE_SETXATTR(self, req, msg): + xattrs = self.getxattrs(req.nodeid) + msg, name, value = fuse_setxattr_in.from_param_head(msg) + assert len(value) == msg.size + # XXX msg.flags ignored + if not name.startswith('user.'): # ENODATA == ENOATTR + raise IOError(errno.ENODATA, "only supports 'user.' xattrs") + name = name[5:] + try: + xattrs[name] = value + except KeyError: + raise IOError(errno.ENODATA, "cannot set xattr") # == ENOATTR + + def FUSE_REMOVEXATTR(self, req, msg): + xattrs = self.getxattrs(req.nodeid) + name = c2pystr(msg) + if not name.startswith('user.'): # ENODATA == ENOATTR + raise IOError(errno.ENODATA, "only supports 'user.' xattrs") + name = name[5:] + try: + del xattrs[name] + except KeyError: + raise IOError(errno.ENODATA, "cannot delete xattr") # == ENOATTR + + +class NoReply(Exception): + pass diff --git a/contrib/fuse/impl_b/pyfuse/httpfs.py b/contrib/fuse/impl_b/pyfuse/httpfs.py new file mode 100644 index 00000000..dffdfbd2 --- /dev/null +++ b/contrib/fuse/impl_b/pyfuse/httpfs.py @@ -0,0 +1,107 @@ +import os, re, urlparse +from handler import Handler +from objectfs import ObjectFs + + +class Root: + def __init__(self): + self.entries = {'gg': GoogleRoot()} + def listdir(self): + return self.entries.keys() + def join(self, hostname): + if hostname in self.entries: + return self.entries[hostname] + if '.' not in hostname: + raise KeyError + result = HtmlNode('http://%s/' % (hostname,)) + self.entries[hostname] = result + return result + + +class UrlNode: + data = None + + def __init__(self, url): + self.url = url + + def getdata(self): + if self.data is None: + print self.url + g = os.popen("lynx -source %r" % (self.url,), 'r') + self.data = g.read() + g.close() + return self.data + + +class HtmlNode(UrlNode): + r_links = re.compile(r']*href="([^"]+)"[^>]*>(.*?)', + re.IGNORECASE | re.DOTALL) + r_images = re.compile(r']*src="([^"]+[.]jpg)"', re.IGNORECASE) + + def format(self, text, index, + TRANSTBL = ''.join([(32<=c<127 and c!=ord('/')) + and chr(c) or '_' + for c in range(256)])): + return text.translate(TRANSTBL) + + def listdir(self): + data = self.getdata() + + seen = {} + def uniquename(name): + name = self.format(name, len(seen)) + if name == '' or name.startswith('.'): + name = '_' + name + basename = name + i = 1 + while name in seen: + i += 1 + name = '%s_%d' % (basename, i) + seen[name] = True + return name + + for link, text in self.r_links.findall(data): + url = urlparse.urljoin(self.url, link) + yield uniquename(text), HtmlNode(url) + + for link in self.r_images.findall(data): + text = os.path.basename(link) + url = urlparse.urljoin(self.url, link) + yield uniquename(text), RawNode(url) + + yield '.source', RawNode(self.url) + + +class RawNode(UrlNode): + + def read(self): + return self.getdata() + + def size(self): + if self.data: + return len(self.data) + else: + return None + + +class GoogleRoot: + def join(self, query): + return GoogleSearch(query) + +class GoogleSearch(HtmlNode): + r_links = re.compile(r']*href="([^"]+)"[^>]*>(.*?)', + re.IGNORECASE | re.DOTALL) + + def __init__(self, query): + self.url = 'http://www.google.com/search?q=' + query + + def format(self, text, index): + text = text.replace('', '').replace('', '') + text = HtmlNode.format(self, text, index) + return '%d. %s' % (index, text) + + +if __name__ == '__main__': + root = Root() + handler = Handler('/home/arigo/mnt', ObjectFs(root)) + handler.loop_forever() diff --git a/contrib/fuse/impl_b/pyfuse/kernel.py b/contrib/fuse/impl_b/pyfuse/kernel.py new file mode 100644 index 00000000..36238a2f --- /dev/null +++ b/contrib/fuse/impl_b/pyfuse/kernel.py @@ -0,0 +1,405 @@ +from struct import pack, unpack, calcsize +import stat + +class Struct(object): + __slots__ = [] + + def __init__(self, data=None, truncate=False, **fields): + if data is not None: + if truncate: + data = data[:self.calcsize()] + self.unpack(data) + for key, value in fields.items(): + setattr(self, key, value) + + def unpack(self, data): + data = unpack(self.__types__, data) + for key, value in zip(self.__slots__, data): + setattr(self, key, value) + + def pack(self): + return pack(self.__types__, *[getattr(self, k, 0) + for k in self.__slots__]) + + def calcsize(cls): + return calcsize(cls.__types__) + calcsize = classmethod(calcsize) + + def __repr__(self): + result = ['%s=%r' % (name, getattr(self, name, None)) + for name in self.__slots__] + return '<%s %s>' % (self.__class__.__name__, ', '.join(result)) + + def from_param(cls, msg): + limit = cls.calcsize() + zero = msg.find('\x00', limit) + assert zero >= 0 + return cls(msg[:limit]), msg[limit:zero] + from_param = classmethod(from_param) + + def from_param2(cls, msg): + limit = cls.calcsize() + zero1 = msg.find('\x00', limit) + assert zero1 >= 0 + zero2 = msg.find('\x00', zero1+1) + assert zero2 >= 0 + return cls(msg[:limit]), msg[limit:zero1], msg[zero1+1:zero2] + from_param2 = classmethod(from_param2) + + def from_head(cls, msg): + limit = cls.calcsize() + return cls(msg[:limit]), msg[limit:] + from_head = classmethod(from_head) + + def from_param_head(cls, msg): + limit = cls.calcsize() + zero = msg.find('\x00', limit) + assert zero >= 0 + return cls(msg[:limit]), msg[limit:zero], msg[zero+1:] + from_param_head = classmethod(from_param_head) + +class StructWithAttr(Struct): + + def unpack(self, data): + limit = -fuse_attr.calcsize() + super(StructWithAttr, self).unpack(data[:limit]) + self.attr = fuse_attr(data[limit:]) + + def pack(self): + return super(StructWithAttr, self).pack() + self.attr.pack() + + def calcsize(cls): + return super(StructWithAttr, cls).calcsize() + fuse_attr.calcsize() + calcsize = classmethod(calcsize) + + +def _mkstruct(name, c, base=Struct): + typ2code = { + '__u32': 'I', + '__s32': 'i', + '__u64': 'Q', + '__s64': 'q'} + slots = [] + types = ['='] + for line in c.split('\n'): + line = line.strip() + if line: + line, tail = line.split(';', 1) + typ, nam = line.split() + slots.append(nam) + types.append(typ2code[typ]) + cls = type(name, (base,), {'__slots__': slots, + '__types__': ''.join(types)}) + globals()[name] = cls + +class timeval(object): + + def __init__(self, attr1, attr2): + self.sec = attr1 + self.nsec = attr2 + + def __get__(self, obj, typ=None): + if obj is None: + return self + else: + return (getattr(obj, self.sec) + + getattr(obj, self.nsec) * 0.000000001) + + def __set__(self, obj, val): + val = int(val * 1000000000) + sec, nsec = divmod(val, 1000000000) + setattr(obj, self.sec, sec) + setattr(obj, self.nsec, nsec) + + def __delete__(self, obj): + delattr(obj, self.sec) + delattr(obj, self.nsec) + +def _mktimeval(cls, attr1, attr2): + assert attr1.startswith('_') + assert attr2.startswith('_') + tv = timeval(attr1, attr2) + setattr(cls, attr1[1:], tv) + +INVALID_INO = 0xFFFFFFFFFFFFFFFF + +def mode2type(mode): + return (mode & 0170000) >> 12 + +TYPE_REG = mode2type(stat.S_IFREG) +TYPE_DIR = mode2type(stat.S_IFDIR) +TYPE_LNK = mode2type(stat.S_IFLNK) + +def c2pystr(s): + n = s.find('\x00') + assert n >= 0 + return s[:n] + +def c2pystr2(s): + first = c2pystr(s) + second = c2pystr(s[len(first)+1:]) + return first, second + +# ____________________________________________________________ + +# Version number of this interface +FUSE_KERNEL_VERSION = 7 + +# Minor version number of this interface +FUSE_KERNEL_MINOR_VERSION = 2 + +# The node ID of the root inode +FUSE_ROOT_ID = 1 + +# The major number of the fuse character device +FUSE_MAJOR = 10 + +# The minor number of the fuse character device +FUSE_MINOR = 229 + +# Make sure all structures are padded to 64bit boundary, so 32bit +# userspace works under 64bit kernels + +_mkstruct('fuse_attr', ''' + __u64 ino; + __u64 size; + __u64 blocks; + __u64 _atime; + __u64 _mtime; + __u64 _ctime; + __u32 _atimensec; + __u32 _mtimensec; + __u32 _ctimensec; + __u32 mode; + __u32 nlink; + __u32 uid; + __u32 gid; + __u32 rdev; +''') +_mktimeval(fuse_attr, '_atime', '_atimensec') +_mktimeval(fuse_attr, '_mtime', '_mtimensec') +_mktimeval(fuse_attr, '_ctime', '_ctimensec') + +_mkstruct('fuse_kstatfs', ''' + __u64 blocks; + __u64 bfree; + __u64 bavail; + __u64 files; + __u64 ffree; + __u32 bsize; + __u32 namelen; +''') + +FATTR_MODE = 1 << 0 +FATTR_UID = 1 << 1 +FATTR_GID = 1 << 2 +FATTR_SIZE = 1 << 3 +FATTR_ATIME = 1 << 4 +FATTR_MTIME = 1 << 5 + +# +# Flags returned by the OPEN request +# +# FOPEN_DIRECT_IO: bypass page cache for this open file +# FOPEN_KEEP_CACHE: don't invalidate the data cache on open +# +FOPEN_DIRECT_IO = 1 << 0 +FOPEN_KEEP_CACHE = 1 << 1 + +fuse_opcode = { + 'FUSE_LOOKUP' : 1, + 'FUSE_FORGET' : 2, # no reply + 'FUSE_GETATTR' : 3, + 'FUSE_SETATTR' : 4, + 'FUSE_READLINK' : 5, + 'FUSE_SYMLINK' : 6, + 'FUSE_MKNOD' : 8, + 'FUSE_MKDIR' : 9, + 'FUSE_UNLINK' : 10, + 'FUSE_RMDIR' : 11, + 'FUSE_RENAME' : 12, + 'FUSE_LINK' : 13, + 'FUSE_OPEN' : 14, + 'FUSE_READ' : 15, + 'FUSE_WRITE' : 16, + 'FUSE_STATFS' : 17, + 'FUSE_RELEASE' : 18, + 'FUSE_FSYNC' : 20, + 'FUSE_SETXATTR' : 21, + 'FUSE_GETXATTR' : 22, + 'FUSE_LISTXATTR' : 23, + 'FUSE_REMOVEXATTR' : 24, + 'FUSE_FLUSH' : 25, + 'FUSE_INIT' : 26, + 'FUSE_OPENDIR' : 27, + 'FUSE_READDIR' : 28, + 'FUSE_RELEASEDIR' : 29, + 'FUSE_FSYNCDIR' : 30, +} + +fuse_opcode2name = [] +def setup(): + for key, value in fuse_opcode.items(): + fuse_opcode2name.extend([None] * (value+1 - len(fuse_opcode2name))) + fuse_opcode2name[value] = key +setup() +del setup + +# Conservative buffer size for the client +FUSE_MAX_IN = 8192 + +FUSE_NAME_MAX = 1024 +FUSE_SYMLINK_MAX = 4096 +FUSE_XATTR_SIZE_MAX = 4096 + +_mkstruct('fuse_entry_out', """ + __u64 nodeid; /* Inode ID */ + __u64 generation; /* Inode generation: nodeid:gen must \ + be unique for the fs's lifetime */ + __u64 _entry_valid; /* Cache timeout for the name */ + __u64 _attr_valid; /* Cache timeout for the attributes */ + __u32 _entry_valid_nsec; + __u32 _attr_valid_nsec; +""", base=StructWithAttr) +_mktimeval(fuse_entry_out, '_entry_valid', '_entry_valid_nsec') +_mktimeval(fuse_entry_out, '_attr_valid', '_attr_valid_nsec') + +_mkstruct('fuse_forget_in', ''' + __u64 nlookup; +''') + +_mkstruct('fuse_attr_out', ''' + __u64 _attr_valid; /* Cache timeout for the attributes */ + __u32 _attr_valid_nsec; + __u32 dummy; +''', base=StructWithAttr) +_mktimeval(fuse_attr_out, '_attr_valid', '_attr_valid_nsec') + +_mkstruct('fuse_mknod_in', ''' + __u32 mode; + __u32 rdev; +''') + +_mkstruct('fuse_mkdir_in', ''' + __u32 mode; + __u32 padding; +''') + +_mkstruct('fuse_rename_in', ''' + __u64 newdir; +''') + +_mkstruct('fuse_link_in', ''' + __u64 oldnodeid; +''') + +_mkstruct('fuse_setattr_in', ''' + __u32 valid; + __u32 padding; +''', base=StructWithAttr) + +_mkstruct('fuse_open_in', ''' + __u32 flags; + __u32 padding; +''') + +_mkstruct('fuse_open_out', ''' + __u64 fh; + __u32 open_flags; + __u32 padding; +''') + +_mkstruct('fuse_release_in', ''' + __u64 fh; + __u32 flags; + __u32 padding; +''') + +_mkstruct('fuse_flush_in', ''' + __u64 fh; + __u32 flush_flags; + __u32 padding; +''') + +_mkstruct('fuse_read_in', ''' + __u64 fh; + __u64 offset; + __u32 size; + __u32 padding; +''') + +_mkstruct('fuse_write_in', ''' + __u64 fh; + __u64 offset; + __u32 size; + __u32 write_flags; +''') + +_mkstruct('fuse_write_out', ''' + __u32 size; + __u32 padding; +''') + +fuse_statfs_out = fuse_kstatfs + +_mkstruct('fuse_fsync_in', ''' + __u64 fh; + __u32 fsync_flags; + __u32 padding; +''') + +_mkstruct('fuse_setxattr_in', ''' + __u32 size; + __u32 flags; +''') + +_mkstruct('fuse_getxattr_in', ''' + __u32 size; + __u32 padding; +''') + +_mkstruct('fuse_getxattr_out', ''' + __u32 size; + __u32 padding; +''') + +_mkstruct('fuse_init_in_out', ''' + __u32 major; + __u32 minor; +''') + +_mkstruct('fuse_in_header', ''' + __u32 len; + __u32 opcode; + __u64 unique; + __u64 nodeid; + __u32 uid; + __u32 gid; + __u32 pid; + __u32 padding; +''') + +_mkstruct('fuse_out_header', ''' + __u32 len; + __s32 error; + __u64 unique; +''') + +class fuse_dirent(Struct): + __slots__ = ['ino', 'off', 'type', 'name'] + + def unpack(self, data): + self.ino, self.off, namelen, self.type = struct.unpack('QQII', + data[:24]) + self.name = data[24:24+namelen] + assert len(self.name) == namelen + + def pack(self): + namelen = len(self.name) + return pack('QQII%ds' % ((namelen+7)&~7,), + self.ino, getattr(self, 'off', 0), namelen, + self.type, self.name) + + def calcsize(cls, namelen): + return 24 + ((namelen+7)&~7) + calcsize = classmethod(calcsize) diff --git a/contrib/fuse/impl_b/pyfuse/memoryfs.py b/contrib/fuse/impl_b/pyfuse/memoryfs.py new file mode 100644 index 00000000..a8c8a2d9 --- /dev/null +++ b/contrib/fuse/impl_b/pyfuse/memoryfs.py @@ -0,0 +1,155 @@ +from kernel import * +from handler import Handler +import stat, time, os, weakref, errno +from cStringIO import StringIO + + +class MemoryFS(object): + INFINITE = 86400.0 + + + class Dir(object): + type = TYPE_DIR + def __init__(self, attr): + self.attr = attr + self.contents = {} # { 'filename': Dir()/File()/SymLink() } + + class File(object): + type = TYPE_REG + def __init__(self, attr): + self.attr = attr + self.data = StringIO() + + class SymLink(object): + type = TYPE_LNK + def __init__(self, attr, target): + self.attr = attr + self.target = target + + + def __init__(self, root=None): + self.uid = os.getuid() + self.gid = os.getgid() + self.umask = os.umask(0); os.umask(self.umask) + self.root = root or self.Dir(self.newattr(stat.S_IFDIR)) + self.root.id = FUSE_ROOT_ID + self.nodes = weakref.WeakValueDictionary() + self.nodes[FUSE_ROOT_ID] = self.root + self.nextid = FUSE_ROOT_ID + 1 + + def newattr(self, s, ino=None, mode=0666): + now = time.time() + attr = fuse_attr(size = 0, + mode = s | (mode & ~self.umask), + nlink = 1, # even on dirs! this confuses 'find' in + # a good way :-) + atime = now, + mtime = now, + ctime = now, + uid = self.uid, + gid = self.gid) + if ino is None: + ino = id(attr) + if ino < 0: + ino = ~ino + attr.ino = ino + return attr + + def getnode(self, id): + return self.nodes[id] + + def modified(self, node): + node.attr.mtime = node.attr.atime = time.time() + if isinstance(node, self.File): + node.data.seek(0, 2) + node.attr.size = node.data.tell() + + def getattr(self, node): + return node.attr, self.INFINITE + + def setattr(self, node, mode, uid, gid, size, atime, mtime): + if mode is not None: + node.attr.mode = (node.attr.mode & ~0777) | (mode & 0777) + if uid is not None: + node.attr.uid = uid + if gid is not None: + node.attr.gid = gid + if size is not None: + assert isinstance(node, self.File) + node.data.seek(0, 2) + oldsize = node.data.tell() + if size < oldsize: + node.data.seek(size) + node.data.truncate() + self.modified(node) + elif size > oldsize: + node.data.write('\x00' * (size - oldsize)) + self.modified(node) + if atime is not None: + node.attr.atime = atime + if mtime is not None: + node.attr.mtime = mtime + + def listdir(self, node): + assert isinstance(node, self.Dir) + for name, subobj in node.contents.items(): + yield name, subobj.type + + def lookup(self, dirnode, filename): + try: + return dirnode.contents[filename].id, self.INFINITE + except KeyError: + raise IOError(errno.ENOENT, filename) + + def open(self, filenode, flags): + return filenode.data + + def newnodeid(self, newnode): + id = self.nextid + self.nextid += 1 + newnode.id = id + self.nodes[id] = newnode + return id + + def mknod(self, dirnode, filename, mode): + node = self.File(self.newattr(stat.S_IFREG, mode=mode)) + dirnode.contents[filename] = node + return self.newnodeid(node), self.INFINITE + + def mkdir(self, dirnode, subdirname, mode): + node = self.Dir(self.newattr(stat.S_IFDIR, mode=mode)) + dirnode.contents[subdirname] = node + return self.newnodeid(node), self.INFINITE + + def symlink(self, dirnode, linkname, target): + node = self.SymLink(self.newattr(stat.S_IFLNK), target) + dirnode.contents[linkname] = node + return self.newnodeid(node), self.INFINITE + + def unlink(self, dirnode, filename): + del dirnode.contents[filename] + + rmdir = unlink + + def readlink(self, symlinknode): + return symlinknode.target + + def rename(self, olddirnode, oldname, newdirnode, newname): + node = olddirnode.contents[oldname] + newdirnode.contents[newname] = node + del olddirnode.contents[oldname] + + def getxattrs(self, node): + try: + return node.xattrs + except AttributeError: + node.xattrs = {} + return node.xattrs + + +if __name__ == '__main__': + import sys + mountpoint = sys.argv[1] + memoryfs = MemoryFS() + handler = Handler(mountpoint, memoryfs) + handler.loop_forever() diff --git a/contrib/fuse/impl_b/pyfuse/mirrorfs.py b/contrib/fuse/impl_b/pyfuse/mirrorfs.py new file mode 100644 index 00000000..6175dc7d --- /dev/null +++ b/contrib/fuse/impl_b/pyfuse/mirrorfs.py @@ -0,0 +1,191 @@ +""" +For reading and caching from slow file system (e.g. DVDs or network). + + python mirrorfs.py + +Makes show a read-only copy of the files in , +caching all data ever read in the to avoid reading it +twice. This script also features optimistic read-ahead: once a +file is accessed, and as long as no other file is accessed, the +whole file is read and cached as fast as the will +provide it. + +You have to clean up manually before mounting a modified +or different . +""" +import sys, os, posixpath, stat + +try: + __file__ +except NameError: + __file__ = sys.argv[0] +this_dir = os.path.dirname(os.path.abspath(__file__)) + +# ____________________________________________________________ + +sys.path.append(os.path.dirname(this_dir)) +from blockfs import valuetree +from handler import Handler +import greenhandler, greensock +from objectfs import ObjectFs + +BLOCKSIZE = 65536 + +class MirrorFS(ObjectFs): + rawfd = None + + def __init__(self, srcdir, cachedir): + self.srcdir = srcdir + self.cachedir = cachedir + self.table = valuetree.ValueTree(os.path.join(cachedir, 'table'), 'q') + if '' not in self.table: + self.initial_read_dir('') + self.table[''] = -1, + try: + self.rawfile = open(os.path.join(cachedir, 'raw'), 'r+b') + except IOError: + self.rawfile = open(os.path.join(cachedir, 'raw'), 'w+b') + ObjectFs.__init__(self, DirNode(self, '')) + self.readahead_at = None + greenhandler.autogreenlet(self.readahead) + + def close(self): + self.table.close() + + def readahead(self): + while True: + greensock.sleep(0.001) + while not self.readahead_at: + greensock.sleep(1) + path, blocknum = self.readahead_at + self.readahead_at = None + try: + self.readblock(path, blocknum, really=False) + except EOFError: + pass + + def initial_read_dir(self, path): + print 'Reading initial directory structure...', path + dirname = os.path.join(self.srcdir, path) + for name in os.listdir(dirname): + filename = os.path.join(dirname, name) + st = os.stat(filename) + if stat.S_ISDIR(st.st_mode): + self.initial_read_dir(posixpath.join(path, name)) + q = -1 + else: + q = st.st_size + self.table[posixpath.join(path, name)] = q, + + def __getitem__(self, key): + self.tablelock.acquire() + try: + return self.table[key] + finally: + self.tablelock.release() + + def readblock(self, path, blocknum, really=True): + s = '%s/%d' % (path, blocknum) + try: + q, = self.table[s] + except KeyError: + print s + self.readahead_at = None + f = open(os.path.join(self.srcdir, path), 'rb') + f.seek(blocknum * BLOCKSIZE) + data = f.read(BLOCKSIZE) + f.close() + if not data: + q = -2 + else: + data += '\x00' * (BLOCKSIZE - len(data)) + self.rawfile.seek(0, 2) + q = self.rawfile.tell() + self.rawfile.write(data) + self.table[s] = q, + if q == -2: + raise EOFError + else: + if q == -2: + raise EOFError + if really: + self.rawfile.seek(q, 0) + data = self.rawfile.read(BLOCKSIZE) + else: + data = None + if self.readahead_at is None: + self.readahead_at = path, blocknum + 1 + return data + + +class Node(object): + + def __init__(self, mfs, path): + self.mfs = mfs + self.path = path + +class DirNode(Node): + + def join(self, name): + path = posixpath.join(self.path, name) + q, = self.mfs.table[path] + if q == -1: + return DirNode(self.mfs, path) + else: + return FileNode(self.mfs, path) + + def listdir(self): + result = [] + for key, value in self.mfs.table.iteritemsfrom(self.path): + if not key.startswith(self.path): + break + tail = key[len(self.path):].lstrip('/') + if tail and '/' not in tail: + result.append(tail) + return result + +class FileNode(Node): + + def size(self): + q, = self.mfs.table[self.path] + return q + + def read(self): + return FileStream(self.mfs, self.path) + +class FileStream(object): + + def __init__(self, mfs, path): + self.mfs = mfs + self.path = path + self.pos = 0 + self.size, = self.mfs.table[path] + + def seek(self, p): + self.pos = p + + def read(self, count): + result = [] + end = min(self.pos + count, self.size) + while self.pos < end: + blocknum, offset = divmod(self.pos, BLOCKSIZE) + data = self.mfs.readblock(self.path, blocknum) + data = data[offset:] + data = data[:end - self.pos] + assert len(data) > 0 + result.append(data) + self.pos += len(data) + return ''.join(result) + +# ____________________________________________________________ + +if __name__ == '__main__': + import sys + srcdir, cachedir, mountpoint = sys.argv[1:] + mirrorfs = MirrorFS(srcdir, cachedir) + try: + handler = Handler(mountpoint, mirrorfs) + greenhandler.add_handler(handler) + greenhandler.mainloop() + finally: + mirrorfs.close() diff --git a/contrib/fuse/impl_b/pyfuse/objectfs.py b/contrib/fuse/impl_b/pyfuse/objectfs.py new file mode 100644 index 00000000..b3580419 --- /dev/null +++ b/contrib/fuse/impl_b/pyfuse/objectfs.py @@ -0,0 +1,174 @@ +from kernel import * +import stat, errno, os, time +from cStringIO import StringIO +from OrderedDict import OrderedDict + + +class ObjectFs: + """A simple read-only file system based on Python objects. + + Interface of Directory objects: + * join(name) returns a file or subdirectory object + * listdir() returns a list of names, or a list of (name, object) + + join() is optional if listdir() returns a list of (name, object). + Alternatively, Directory objects can be plain dictionaries {name: object}. + + Interface of File objects: + * size() returns the size + * read() returns the data + + Alternatively, File objects can be plain strings. + + Interface of SymLink objects: + * readlink() returns the symlink's target, as a string + """ + + INFINITE = 86400.0 + USE_DIR_CACHE = True + + def __init__(self, rootnode): + self.nodes = {FUSE_ROOT_ID: rootnode} + if self.USE_DIR_CACHE: + self.dircache = {} + self.starttime = time.time() + self.uid = os.getuid() + self.gid = os.getgid() + self.umask = os.umask(0); os.umask(self.umask) + + def newattr(self, s, ino, mode=0666): + if ino < 0: + ino = ~ino + return fuse_attr(ino = ino, + size = 0, + mode = s | (mode & ~self.umask), + nlink = 1, # even on dirs! this confuses 'find' in + # a good way :-) + atime = self.starttime, + mtime = self.starttime, + ctime = self.starttime, + uid = self.uid, + gid = self.gid) + + def getnode(self, nodeid): + try: + return self.nodes[nodeid] + except KeyError: + raise IOError(errno.ESTALE, nodeid) + + def getattr(self, node): + timeout = self.INFINITE + if isinstance(node, str): + attr = self.newattr(stat.S_IFREG, id(node)) + attr.size = len(node) + elif hasattr(node, 'readlink'): + target = node.readlink() + attr = self.newattr(stat.S_IFLNK, id(node)) + attr.size = len(target) + attr.mode |= 0777 + elif hasattr(node, 'size'): + sz = node.size() + attr = self.newattr(stat.S_IFREG, id(node)) + if sz is None: + timeout = 0 + else: + attr.size = sz + else: + attr = self.newattr(stat.S_IFDIR, id(node), mode=0777) + #print 'getattr(%s) -> %s, %s' % (node, attr, timeout) + return attr, timeout + + def getentries(self, node): + if isinstance(node, dict): + return node + try: + if not self.USE_DIR_CACHE: + raise KeyError + return self.dircache[node] + except KeyError: + entries = OrderedDict() + if hasattr(node, 'listdir'): + for name in node.listdir(): + if isinstance(name, tuple): + name, subnode = name + else: + subnode = None + entries[name] = subnode + if self.USE_DIR_CACHE: + self.dircache[node] = entries + return entries + + def listdir(self, node): + entries = self.getentries(node) + for name, subnode in entries.items(): + if subnode is None: + subnode = node.join(name) + self.nodes[uid(subnode)] = subnode + entries[name] = subnode + if isinstance(subnode, str): + yield name, TYPE_REG + elif hasattr(subnode, 'readlink'): + yield name, TYPE_LNK + elif hasattr(subnode, 'size'): + yield name, TYPE_REG + else: + yield name, TYPE_DIR + + def lookup(self, node, name): + entries = self.getentries(node) + try: + subnode = entries.get(name) + if subnode is None: + if hasattr(node, 'join'): + subnode = node.join(name) + entries[name] = subnode + else: + raise KeyError + except KeyError: + raise IOError(errno.ENOENT, name) + else: + return self.reply(subnode) + + def reply(self, node): + res = uid(node) + self.nodes[res] = node + return res, self.INFINITE + + def open(self, node, mode): + if not isinstance(node, str): + node = node.read() + if not hasattr(node, 'read'): + node = StringIO(node) + return node + + def readlink(self, node): + return node.readlink() + + def getxattrs(self, node): + return getattr(node, '__dict__', {}) + +# ____________________________________________________________ + +import struct +try: + HUGEVAL = 256 ** struct.calcsize('P') +except struct.error: + HUGEVAL = 0 + +def fixid(result): + if result < 0: + result += HUGEVAL + return result + +def uid(obj): + """ + Return the id of an object as an unsigned number so that its hex + representation makes sense + """ + return fixid(id(obj)) + +class SymLink(object): + def __init__(self, target): + self.target = target + def readlink(self): + return self.target diff --git a/contrib/fuse/impl_b/pyfuse/pairtype.py b/contrib/fuse/impl_b/pyfuse/pairtype.py new file mode 100644 index 00000000..bde2913f --- /dev/null +++ b/contrib/fuse/impl_b/pyfuse/pairtype.py @@ -0,0 +1,63 @@ +""" +Two magic tricks for classes: + + class X: + __metaclass__ = extendabletype + ... + + # in some other file... + class __extend__(X): + ... # and here you can add new methods and class attributes to X + +Mostly useful together with the second trick, which lets you build +methods whose 'self' is a pair of objects instead of just one: + + class __extend__(pairtype(X, Y)): + attribute = 42 + def method((x, y), other, arguments): + ... + + pair(x, y).attribute + pair(x, y).method(other, arguments) + +This finds methods and class attributes based on the actual +class of both objects that go into the pair(), with the usual +rules of method/attribute overriding in (pairs of) subclasses. + +For more information, see test_pairtype. +""" + +class extendabletype(type): + """A type with a syntax trick: 'class __extend__(t)' actually extends + the definition of 't' instead of creating a new subclass.""" + def __new__(cls, name, bases, dict): + if name == '__extend__': + for cls in bases: + for key, value in dict.items(): + if key == '__module__': + continue + # XXX do we need to provide something more for pickling? + setattr(cls, key, value) + return None + else: + return super(extendabletype, cls).__new__(cls, name, bases, dict) + + +def pair(a, b): + """Return a pair object.""" + tp = pairtype(a.__class__, b.__class__) + return tp((a, b)) # tp is a subclass of tuple + +pairtypecache = {} + +def pairtype(cls1, cls2): + """type(pair(a,b)) is pairtype(a.__class__, b.__class__).""" + try: + pair = pairtypecache[cls1, cls2] + except KeyError: + name = 'pairtype(%s, %s)' % (cls1.__name__, cls2.__name__) + bases1 = [pairtype(base1, cls2) for base1 in cls1.__bases__] + bases2 = [pairtype(cls1, base2) for base2 in cls2.__bases__] + bases = tuple(bases1 + bases2) or (tuple,) # 'tuple': ultimate base + pair = pairtypecache[cls1, cls2] = extendabletype(name, bases, {}) + return pair diff --git a/contrib/fuse/impl_b/pyfuse/pathfs.py b/contrib/fuse/impl_b/pyfuse/pathfs.py new file mode 100644 index 00000000..1a382eb3 --- /dev/null +++ b/contrib/fuse/impl_b/pyfuse/pathfs.py @@ -0,0 +1,92 @@ +from kernel import * +import errno, posixpath, os + + +class PathFs(object): + """Base class for a read-write FUSE file system interface + whose underlying content is best accessed with '/'-separated + string paths. + """ + uid = os.getuid() + gid = os.getgid() + umask = os.umask(0); os.umask(umask) + timeout = 86400.0 + + def __init__(self, root=''): + self._paths = {FUSE_ROOT_ID: root} + self._path2id = {root: FUSE_ROOT_ID} + self._nextid = FUSE_ROOT_ID + 1 + + def getnode(self, nodeid): + try: + return self._paths[nodeid] + except KeyError: + raise IOError(errno.ESTALE, nodeid) + + def forget(self, nodeid): + try: + p = self._paths.pop(nodeid) + del self._path2id[p] + except KeyError: + pass + + def cachepath(self, path): + if path in self._path2id: + return self._path2id[path] + id = self._nextid + self._nextid += 1 + self._paths[id] = path + self._path2id[path] = id + return id + + def mkattr(self, path, size, st_kind, mode, time): + attr = fuse_attr(ino = self._path2id[path], + size = size, + mode = st_kind | (mode & ~self.umask), + nlink = 1, # even on dirs! this confuses 'find' in + # a good way :-) + atime = time, + mtime = time, + ctime = time, + uid = self.uid, + gid = self.gid) + return attr, self.timeout + + def lookup(self, path, name): + npath = posixpath.join(path, name) + if not self.check_path(npath): + raise IOError(errno.ENOENT, name) + return self.cachepath(npath), self.timeout + + def mknod(self, path, name, mode): + npath = posixpath.join(path, name) + self.mknod_path(npath, mode) + return self.cachepath(npath), self.timeout + + def mkdir(self, path, name, mode): + npath = posixpath.join(path, name) + self.mkdir_path(npath, mode) + return self.cachepath(npath), self.timeout + + def unlink(self, path, name): + npath = posixpath.join(path, name) + self.unlink_path(npath) + + def rmdir(self, path, name): + npath = posixpath.join(path, name) + self.rmdir_path(npath) + + def rename(self, oldpath, oldname, newpath, newname): + noldpath = posixpath.join(oldpath, oldname) + nnewpath = posixpath.join(newpath, newname) + if not self.rename_path(noldpath, nnewpath): + raise IOError(errno.ENOENT, oldname) + # fix all paths in the cache + N = len(noldpath) + for id, path in self._paths.items(): + if path.startswith(noldpath): + if len(path) == N or path[N] == '/': + del self._path2id[path] + path = nnewpath + path[N:] + self._paths[id] = path + self._path2id[path] = id diff --git a/contrib/fuse/impl_b/pyfuse/pysvnfs.py b/contrib/fuse/impl_b/pyfuse/pysvnfs.py new file mode 100644 index 00000000..43694f57 --- /dev/null +++ b/contrib/fuse/impl_b/pyfuse/pysvnfs.py @@ -0,0 +1,181 @@ +from kernel import * +import errno, posixpath, weakref +from time import time as now +from stat import S_IFDIR, S_IFREG, S_IFMT +from cStringIO import StringIO +from handler import Handler +from pathfs import PathFs +from pysvn.ra_filesystem import SvnRepositoryFilesystem +import pysvn.date + + +class SvnFS(PathFs): + + def __init__(self, svnurl, root=''): + super(SvnFS, self).__init__(root) + self.svnurl = svnurl + self.openfiles = weakref.WeakValueDictionary() + self.creationtimes = {} + self.do_open() + + def do_open(self, rev='HEAD'): + self.fs = SvnRepositoryFilesystem(svnurl, rev) + + def do_commit(self, msg): + rev = self.fs.commit(msg) + if rev is None: + print '* no changes.' + else: + print '* checked in revision %d.' % (rev,) + self.do_open() + + def do_status(self, path=''): + print '* status' + result = [] + if path and not path.endswith('/'): + path += '/' + for delta in self.fs._compute_deltas(): + if delta.path.startswith(path): + if delta.oldrev is None: + c = 'A' + elif delta.newrev is None: + c = 'D' + else: + c = 'M' + result.append(' %s %s\n' % (c, delta.path[len(path):])) + return ''.join(result) + + def getattr(self, path): + stat = self.fs.stat(path) + if stat['svn:entry:kind'] == 'dir': + s = S_IFDIR + mode = 0777 + else: + s = S_IFREG + mode = 0666 + try: + time = pysvn.date.decode(stat['svn:entry:committed-date']) + except KeyError: + try: + time = self.creationtimes[path] + except KeyError: + time = self.creationtimes[path] = now() + return self.mkattr(path, + size = stat.get('svn:entry:size', 0), + st_kind = s, + mode = mode, + time = time) + + def setattr(self, path, mode, uid, gid, size, atime, mtime): + if size is not None: + data = self.fs.read(path) + if size < len(data): + self.fs.write(path, data[:size]) + elif size > len(data): + self.fs.write(path, data + '\x00' * (size - len(data))) + + def listdir(self, path): + for name in self.fs.listdir(path): + kind = self.fs.check_path(posixpath.join(path, name)) + if kind == 'dir': + yield name, TYPE_DIR + else: + yield name, TYPE_REG + + def check_path(self, path): + kind = self.fs.check_path(path) + return kind is not None + + def open(self, path, mode): + try: + of = self.openfiles[path] + except KeyError: + of = self.openfiles[path] = OpenFile(self.fs.read(path)) + return of, FOPEN_KEEP_CACHE + + def modified(self, path): + try: + of = self.openfiles[path] + except KeyError: + pass + else: + self.fs.write(path, of.f.getvalue()) + + def mknod_path(self, path, mode): + self.fs.add(path) + + def mkdir_path(self, path, mode): + self.fs.mkdir(path) + + def unlink_path(self, path): + self.fs.unlink(path) + + def rmdir_path(self, path): + self.fs.rmdir(path) + + def rename_path(self, oldpath, newpath): + kind = self.fs.check_path(oldpath) + if kind is None: + return False + self.fs.move(oldpath, newpath, kind) + return True + + def getxattrs(self, path): + return XAttrs(self, path) + + +class OpenFile: + def __init__(self, data=''): + self.f = StringIO() + self.f.write(data) + self.f.seek(0) + + def seek(self, pos): + self.f.seek(pos) + + def read(self, sz): + return self.f.read(sz) + + def write(self, buf): + self.f.write(buf) + + +class XAttrs: + def __init__(self, svnfs, path): + self.svnfs = svnfs + self.path = path + + def keys(self): + return [] + + def __getitem__(self, key): + if key == 'status': + return self.svnfs.do_status(self.path) + raise KeyError(key) + + def __setitem__(self, key, value): + if key == 'commit' and self.path == '': + self.svnfs.do_commit(value) + elif key == 'update' and self.path == '': + if self.svnfs.fs.modified(): + raise IOError(errno.EPERM, "there are local changes") + if value == '': + rev = 'HEAD' + else: + try: + rev = int(value) + except ValueError: + raise IOError(errno.EPERM, "invalid revision number") + self.svnfs.do_open(rev) + else: + raise KeyError(key) + + def __delitem__(self, key): + raise KeyError(key) + + +if __name__ == '__main__': + import sys + svnurl, mountpoint = sys.argv[1:] + handler = Handler(mountpoint, SvnFS(svnurl)) + handler.loop_forever() diff --git a/contrib/fuse/impl_b/pyfuse/r_svnfs.py b/contrib/fuse/impl_b/pyfuse/r_svnfs.py new file mode 100644 index 00000000..c3f37ab8 --- /dev/null +++ b/contrib/fuse/impl_b/pyfuse/r_svnfs.py @@ -0,0 +1,142 @@ +""" +A read-only svn fs showing all the revisions in subdirectories. +""" +from objectfs import ObjectFs, SymLink +from handler import Handler +from pysvn.ra import connect +from pysvn.date import decode +import errno, posixpath, time + + +#USE_SYMLINKS = 0 # they are wrong if the original file had another path + +# use getfattr -d filename to see the node's attributes, which include +# information like the revision at which the file was last modified + + +class Root: + def __init__(self, svnurl): + self.svnurl = svnurl + self.ra = connect(svnurl) + self.head = self.ra.get_latest_rev() + + def listdir(self): + for rev in range(1, self.head+1): + yield str(rev) + yield 'HEAD' + + def join(self, name): + try: + rev = int(name) + except ValueError: + if name == 'HEAD': + return SymLink(str(self.head)) + else: + raise KeyError(name) + return TopLevelDir(self.ra, rev, rev, '') + + +class Node: + def __init__(self, ra, rev, last_changed_rev, path): + self.ra = ra + self.rev = rev + self.last_changed_rev = last_changed_rev + self.path = path + + def __repr__(self): + return '<%s %d/%s>' % (self.__class__.__name__, self.rev, self.path) + +class Dir(Node): + def listdir(self): + rev, props, entries = self.ra.get_dir(self.path, self.rev, + want_props = False) + for key, stats in entries.items(): + yield key, getnode(self.ra, self.rev, + posixpath.join(self.path, key), stats) + +class File(Node): + def __init__(self, ra, rev, last_changed_rev, path, size): + Node.__init__(self, ra, rev, last_changed_rev, path) + self.filesize = size + + def size(self): + return self.filesize + + def read(self): + checksum, rev, props, data = self.ra.get_file(self.path, self.rev, + want_props = False) + return data + + +class TopLevelDir(Dir): + def listdir(self): + for item in Dir.listdir(self): + yield item + yield 'svn:log', Log(self.ra, self.rev) + +class Log: + + def __init__(self, ra, rev): + self.ra = ra + self.rev = rev + + def getlogentry(self): + try: + return self.logentry + except AttributeError: + logentries = self.ra.log('', startrev=self.rev, endrev=self.rev) + try: + [self.logentry] = logentries + except ValueError: + self.logentry = None + return self.logentry + + def size(self): + return len(self.read()) + + def read(self): + logentry = self.getlogentry() + if logentry is None: + return 'r%d | (no change here)\n' % (self.rev,) + datetuple = time.gmtime(decode(logentry.date)) + date = time.strftime("%c", datetuple) + return 'r%d | %s | %s\n\n%s' % (self.rev, + logentry.author, + date, + logentry.message) + + +if 0: + pass +##if USE_SYMLINKS: +## def getnode(ra, rev, path, stats): +## committed_rev = stats['svn:entry:committed-rev'] +## if committed_rev == rev: +## kind = stats['svn:entry:kind'] +## if kind == 'file': +## return File(ra, rev, path, stats['svn:entry:size']) +## elif kind == 'dir': +## return Dir(ra, rev, path) +## else: +## raise IOError(errno.EINVAL, "kind %r" % (kind,)) +## else: +## depth = path.count('/') +## return SymLink('../' * depth + '../%d/%s' % (committed_rev, path)) +else: + def getnode(ra, rev, path, stats): + last_changed_rev = stats['svn:entry:committed-rev'] + kind = stats['svn:entry:kind'] + if kind == 'file': + return File(ra, rev, last_changed_rev, path, + stats['svn:entry:size']) + elif kind == 'dir': + return Dir(ra, rev, last_changed_rev, path) + else: + raise IOError(errno.EINVAL, "kind %r" % (kind,)) + + +if __name__ == '__main__': + import sys + svnurl, mountpoint = sys.argv[1:] + handler = Handler(mountpoint, ObjectFs(Root(svnurl))) + handler.loop_forever() diff --git a/contrib/fuse/impl_b/pyfuse/rwobjectfs.py b/contrib/fuse/impl_b/pyfuse/rwobjectfs.py new file mode 100644 index 00000000..04907021 --- /dev/null +++ b/contrib/fuse/impl_b/pyfuse/rwobjectfs.py @@ -0,0 +1,305 @@ +from kernel import * +import stat, errno, os, time +from cStringIO import StringIO +from OrderedDict import OrderedDict + +INFINITE = 86400.0 + + +class Wrapper(object): + def __init__(self, obj): + self.obj = obj + + def getuid(self): + return uid(self.obj) + + def __hash__(self): + return hash(self.obj) + + def __eq__(self, other): + return self.obj == other + + def __ne__(self, other): + return self.obj != other + + +class BaseDir(object): + + def join(self, name): + "Return a file or subdirectory object" + for item in self.listdir(): + if isinstance(item, tuple): + subname, subnode = item + if subname == name: + return subnode + raise KeyError(name) + + def listdir(self): + "Return a list of names, or a list of (name, object)" + raise NotImplementedError + + def create(self, name): + "Create a file" + raise NotImplementedError + + def mkdir(self, name): + "Create a subdirectory" + raise NotImplementedError + + def symlink(self, name, target): + "Create a symbolic link" + raise NotImplementedError + + def unlink(self, name): + "Remove a file or subdirectory." + raise NotImplementedError + + def rename(self, newname, olddirnode, oldname): + "Move another node into this directory." + raise NotImplementedError + + def getuid(self): + return uid(self) + + def getattr(self, fs): + return fs.newattr(stat.S_IFDIR, self.getuid(), mode=0777), INFINITE + + def setattr(self, **kwds): + pass + + def getentries(self): + entries = OrderedDict() + for name in self.listdir(): + if isinstance(name, tuple): + name, subnode = name + else: + subnode = None + entries[name] = subnode + return entries + + +class BaseFile(object): + + def size(self): + "Return the size of the file, or None if not known yet" + f = self.open() + if isinstance(f, str): + return len(f) + f.seek(0, 2) + return f.tell() + + def open(self): + "Return the content as a string or a file-like object" + raise NotImplementedError + + def getuid(self): + return uid(self) + + def getattr(self, fs): + sz = self.size() + attr = fs.newattr(stat.S_IFREG, self.getuid()) + if sz is None: + timeout = 0 + else: + attr.size = sz + timeout = INFINITE + return attr, timeout + + def setattr(self, size, **kwds): + f = self.open() + if self.size() == size: + return + if isinstance(f, str): + raise IOError(errno.EPERM) + f.seek(size) + f.truncate() + + +class BaseSymLink(object): + + def readlink(self): + "Return the symlink's target, as a string" + raise NotImplementedError + + def getuid(self): + return uid(self) + + def getattr(self, fs): + target = self.readlink() + attr = fs.newattr(stat.S_IFLNK, self.getuid()) + attr.size = len(target) + attr.mode |= 0777 + return attr, INFINITE + + def setattr(self, **kwds): + pass + +# ____________________________________________________________ + +class Dir(BaseDir): + def __init__(self, **contents): + self.contents = contents + def listdir(self): + return self.contents.items() + def join(self, name): + return self.contents[name] + def create(self, fs, name): + node = fs.File() + self.contents[name] = node + return node + def mkdir(self, fs, name): + node = fs.Dir() + self.contents[name] = node + return node + def symlink(self, fs, name, target): + node = fs.SymLink(target) + self.contents[name] = node + return node + def unlink(self, name): + del self.contents[name] + def rename(self, newname, olddirnode, oldname): + oldnode = olddirnode.join(oldname) + olddirnode.unlink(oldname) + self.contents[newname] = oldnode + +class File(BaseFile): + def __init__(self): + self.data = StringIO() + def size(self): + self.data.seek(0, 2) + return self.data.tell() + def open(self): + return self.data + +class SymLink(BaseFile): + def __init__(self, target): + self.target = target + def readlink(self): + return self.target + +# ____________________________________________________________ + + +class RWObjectFs(object): + """A simple read-write file system based on Python objects.""" + + UID = os.getuid() + GID = os.getgid() + UMASK = os.umask(0); os.umask(UMASK) + + Dir = Dir + File = File + SymLink = SymLink + + def __init__(self, rootnode): + self.nodes = {FUSE_ROOT_ID: rootnode} + self.starttime = time.time() + + def newattr(self, s, ino, mode=0666): + return fuse_attr(ino = ino, + size = 0, + mode = s | (mode & ~self.UMASK), + nlink = 1, # even on dirs! this confuses 'find' in + # a good way :-) + atime = self.starttime, + mtime = self.starttime, + ctime = self.starttime, + uid = self.UID, + gid = self.GID) + + def getnode(self, nodeid): + try: + return self.nodes[nodeid] + except KeyError: + raise IOError(errno.ESTALE, nodeid) + + def getattr(self, node): + return node.getattr(self) + + def setattr(self, node, mode, uid, gid, size, atime, mtime): + node.setattr(mode=mode, uid=uid, gid=gid, size=size, + atime=atime, mtime=mtime) + + def listdir(self, node): + entries = node.getentries() + for name, subnode in entries.items(): + if subnode is None: + subnode = node.join(name) + self.nodes[uid(subnode)] = subnode + entries[name] = subnode + if isinstance(subnode, str): + yield name, TYPE_REG + elif hasattr(subnode, 'readlink'): + yield name, TYPE_LNK + elif hasattr(subnode, 'size'): + yield name, TYPE_REG + else: + yield name, TYPE_DIR + + def lookup(self, node, name): + try: + subnode = node.join(name) + except KeyError: + raise IOError(errno.ENOENT, name) + else: + res = uid(subnode) + self.nodes[res] = subnode + return res, INFINITE + + def mknod(self, dirnode, filename, mode): + node = dirnode.create(filename) + return self.newnodeid(node), INFINITE + + def mkdir(self, dirnode, subdirname, mode): + node = dirnode.mkdir(subdirname) + return self.newnodeid(node), INFINITE + + def symlink(self, dirnode, linkname, target): + node = dirnode.symlink(linkname, target) + return self.newnodeid(node), INFINITE + + def unlink(self, dirnode, filename): + try: + dirnode.unlink(filename) + except KeyError: + raise IOError(errno.ENOENT, filename) + + rmdir = unlink + + def open(self, node, mode): + f = node.open() + if isinstance(f, str): + f = StringIO(f) + return f + + def readlink(self, node): + return node.readlink() + + def rename(self, olddirnode, oldname, newdirnode, newname): + try: + newdirnode.rename(newname, olddirnode, oldname) + except KeyError: + raise IOError(errno.ENOENT, oldname) + + def getxattrs(self, node): + return getattr(node, '__dict__', {}) + +# ____________________________________________________________ + +import struct +try: + HUGEVAL = 256 ** struct.calcsize('P') +except struct.error: + HUGEVAL = 0 + +def fixid(result): + if result < 0: + result += HUGEVAL + return result + +def uid(obj): + """ + Return the id of an object as an unsigned number so that its hex + representation makes sense + """ + return fixid(id(obj)) diff --git a/contrib/fuse/impl_b/pyfuse/svnfs.py b/contrib/fuse/impl_b/pyfuse/svnfs.py new file mode 100644 index 00000000..05b20b35 --- /dev/null +++ b/contrib/fuse/impl_b/pyfuse/svnfs.py @@ -0,0 +1,42 @@ +import py +from handler import Handler +from objectfs import ObjectFs + + +class SvnDir: + def __init__(self, path): + self.path = path + + def listdir(self): + for p in self.path.listdir(): + if p.check(dir=1): + cls = SvnDir + else: + cls = SvnFile + yield p.basename, cls(p) + + +class SvnFile: + data = None + + def __init__(self, path): + self.path = path + + def size(self): + if self.data is None: + return None + else: + return len(self.data) + + def read(self): + if self.data is None: + self.data = self.path.read() + return self.data + + +if __name__ == '__main__': + import sys + svnurl, mountpoint = sys.argv[1:] + root = SvnDir(py.path.svnurl(svnurl)) + handler = Handler(mountpoint, ObjectFs(root)) + handler.loop_forever() diff --git a/contrib/fuse/impl_b/pyfuse/tahoe.py b/contrib/fuse/impl_b/pyfuse/tahoe.py new file mode 100644 index 00000000..06712f09 --- /dev/null +++ b/contrib/fuse/impl_b/pyfuse/tahoe.py @@ -0,0 +1,106 @@ +""" +PyFuse client for the Tahoe distributed file system. +See http://allmydata.org/ +""" + +# Read-only for now. + +# Portions copied from the file contrib/fuse/tahoe_fuse.py distributed +# with Tahoe 1.0.0. + +import os, sys +from objectfs import ObjectFs +from handler import Handler +import simplejson +import urllib + + +### Config: +TahoeConfigDir = '~/.tahoe' + + +### Utilities for debug: +def log(msg, *args): + print msg % args + + +class TahoeConnection: + def __init__(self, confdir): + self.confdir = confdir + self._init_url() + + def _init_url(self): + f = open(os.path.join(self.confdir, 'webport'), 'r') + contents = f.read() + f.close() + + fields = contents.split(':') + proto, port = fields[:2] + assert proto == 'tcp' + port = int(port) + self.url = 'http://localhost:%d' % (port,) + + def get_root(self): + # For now we just use the same default as the CLI: + rootdirfn = os.path.join(self.confdir, 'private', 'root_dir.cap') + f = open(rootdirfn, 'r') + cap = f.read().strip() + f.close() + return TahoeDir(self, canonicalize_cap(cap)) + + +class TahoeNode: + def __init__(self, conn, uri): + self.conn = conn + self.uri = uri + + def get_metadata(self): + f = self._open('?t=json') + json = f.read() + f.close() + return simplejson.loads(json) + + def _open(self, postfix=''): + url = '%s/uri/%s%s' % (self.conn.url, self.uri, postfix) + log('*** Fetching: %r', url) + return urllib.urlopen(url) + + +class TahoeDir(TahoeNode): + def listdir(self): + flag, md = self.get_metadata() + assert flag == 'dirnode' + result = [] + for name, (childflag, childmd) in md['children'].items(): + if childflag == 'dirnode': + cls = TahoeDir + else: + cls = TahoeFile + result.append((str(name), cls(self.conn, childmd['ro_uri']))) + return result + +class TahoeFile(TahoeNode): + def size(self): + rawsize = self.get_metadata()[1]['size'] + return rawsize + + def read(self): + return self._open().read() + + +def canonicalize_cap(cap): + cap = urllib.unquote(cap) + i = cap.find('URI:') + assert i != -1, 'A cap must contain "URI:...", but this does not: ' + cap + return cap[i:] + +def main(mountpoint, basedir): + conn = TahoeConnection(basedir) + root = conn.get_root() + handler = Handler(mountpoint, ObjectFs(root)) + handler.loop_forever() + +if __name__ == '__main__': + [mountpoint] = sys.argv[1:] + basedir = os.path.expanduser(TahoeConfigDir) + main(mountpoint, basedir) diff --git a/contrib/fuse/impl_b/pyfuse/test.py b/contrib/fuse/impl_b/pyfuse/test.py new file mode 100644 index 00000000..b0b07b27 --- /dev/null +++ b/contrib/fuse/impl_b/pyfuse/test.py @@ -0,0 +1,172 @@ +from handler import Handler +import stat, errno, os, time +from cStringIO import StringIO +from kernel import * + + +UID = os.getuid() +GID = os.getgid() +UMASK = os.umask(0); os.umask(UMASK) +INFINITE = 86400.0 + + +class Node(object): + __slots__ = ['attr', 'data'] + + def __init__(self, attr, data=None): + self.attr = attr + self.data = data + + def type(self): + return mode2type(self.attr.mode) + + def modified(self): + self.attr.mtime = self.attr.atime = time.time() + t = self.type() + if t == TYPE_REG: + f = self.data + pos = f.tell() + f.seek(0, 2) + self.attr.size = f.tell() + f.seek(pos) + elif t == TYPE_DIR: + nsubdirs = 0 + for nodeid in self.data.values(): + nsubdirs += nodeid & 1 + self.attr.nlink = 2 + nsubdirs + + +def newattr(s, mode=0666): + now = time.time() + return fuse_attr(ino = INVALID_INO, + size = 0, + mode = s | (mode & ~UMASK), + nlink = 1 + (s == stat.S_IFDIR), + atime = now, + mtime = now, + ctime = now, + uid = UID, + gid = GID) + +# ____________________________________________________________ + +class Filesystem: + + def __init__(self, rootnode): + self.nodes = {FUSE_ROOT_ID: rootnode} + self.nextid = 2 + assert self.nextid > FUSE_ROOT_ID + + def getnode(self, nodeid): + try: + return self.nodes[nodeid] + except KeyError: + raise IOError(errno.ESTALE, nodeid) + + def forget(self, nodeid): + pass + + def cachenode(self, node): + id = self.nextid + self.nextid += 2 + if node.type() == TYPE_DIR: + id += 1 + self.nodes[id] = node + return id + + def getattr(self, node): + return node.attr, INFINITE + + def setattr(self, node, mode=None, uid=None, gid=None, + size=None, atime=None, mtime=None): + if mode is not None: node.attr.mode = (node.attr.mode&~0777) | mode + if uid is not None: node.attr.uid = uid + if gid is not None: node.attr.gid = gid + if atime is not None: node.attr.atime = atime + if mtime is not None: node.attr.mtime = mtime + if size is not None and node.type() == TYPE_REG: + node.data.seek(size) + node.data.truncate() + + def listdir(self, node): + for name, subnodeid in node.data.items(): + subnode = self.nodes[subnodeid] + yield name, subnode.type() + + def lookup(self, node, name): + try: + return node.data[name], INFINITE + except KeyError: + pass + if hasattr(node, 'findnode'): + try: + subnode = node.findnode(name) + except KeyError: + pass + else: + id = self.cachenode(subnode) + node.data[name] = id + return id, INFINITE + raise IOError(errno.ENOENT, name) + + def open(self, node, mode): + return node.data + + def mknod(self, node, name, mode): + subnode = Node(newattr(mode & 0170000, mode & 0777)) + if subnode.type() == TYPE_REG: + subnode.data = StringIO() + else: + raise NotImplementedError + id = self.cachenode(subnode) + node.data[name] = id + node.modified() + return id, INFINITE + + def mkdir(self, node, name, mode): + subnode = Node(newattr(stat.S_IFDIR, mode & 0777), {}) + id = self.cachenode(subnode) + node.data[name] = id + node.modified() + return id, INFINITE + + def symlink(self, node, linkname, target): + subnode = Node(newattr(stat.S_IFLNK, 0777), target) + id = self.cachenode(subnode) + node.data[linkname] = id + node.modified() + return id, INFINITE + + def readlink(self, node): + assert node.type() == TYPE_LNK + return node.data + + def unlink(self, node, name): + try: + del node.data[name] + except KeyError: + raise IOError(errno.ENOENT, name) + node.modified() + + rmdir = unlink + + def rename(self, oldnode, oldname, newnode, newname): + if newnode.type() != TYPE_DIR: + raise IOError(errno.ENOTDIR, newnode) + try: + nodeid = oldnode.data.pop(oldname) + except KeyError: + raise IOError(errno.ENOENT, oldname) + oldnode.modified() + newnode.data[newname] = nodeid + newnode.modified() + + def modified(self, node): + node.modified() + +# ____________________________________________________________ + +if __name__ == '__main__': + root = Node(newattr(stat.S_IFDIR), {}) + handler = Handler('/home/arigo/mnt', Filesystem(root)) + handler.loop_forever()