def truncate(self, path, length, fh=None):
if path not in self.files:
print("Truncate in other location")
packet = packets.new_packet(OP_FIND) # ask bootstrap - find location of file
packet['path'] = path
print('Sending OP_FIND for TRUNCATE', packet)
sock = socks.tcp_sock()
sock.connect(self.bootstrap)
sock.send(packets.build(packet))
reply = packets.unpack(sock.recv(MAX_READ))
print('Received OP_FIND_R for TRUNCATE', reply)
if 'loc' not in reply:
raise FuseOSError(ENOENT)
loc = tuple(reply['loc'])
tcp_sock = socks.tcp_sock()
tcp_sock.connect(loc) # connect to other node
packet = packets.new_packet(OP_TRUNC)
packet['path'] = path
packet['length'] = length
print('Sending OP_TRUNCATE', packet)
tcp_sock.send(packets.build(packet)) # send syscall
reply = packets.unpack(tcp_sock.recv(MAX_READ)) # TODO: listen for reply in select
print('Received OP_TRUNCATE_R', reply)
else:
# make sure extending the file fills in zero bytes
self.data[path] = self.data[path][:length].ljust(
length, b'\x00'.decode())
self.files[path]['st_size'] = length
def getattr(self, path, fh=None):
print("memory.py getattr called")
if path not in self.files:
packet = packets.new_packet(OP_FIND) # ask bootstrap - find location of file
packet['path'] = path
print('Sending OP_FIND for getattr', packet)
sock = socks.tcp_sock()
sock.connect(self.bootstrap)
sock.send(packets.build(packet))
reply = packets.unpack(sock.recv(MAX_READ))
print('Received OP_FIND_Rfor getattr', reply)
if 'loc' not in reply:
raise FuseOSError(ENOENT)
loc = tuple(reply['loc'])
tcp_sock = socks.tcp_sock()
tcp_sock.connect(loc) # connect to other node
packet = packets.new_packet(OP_GETATTR)
packet['path'] = path
print('Sending OP_GETATTR', packet)
tcp_sock.send(packets.build(packet)) # send syscall
reply = packets.unpack(tcp_sock.recv(MAX_READ)) # TODO: listen for reply in select
print('Received OP_GETATTR_R', reply)
if reply['getattr']:
return reply['getattr']
else: raise FuseOSError(ENOENT)
return self.files[path]
def unlink(self, path):
print("In Unlink")
brename = packets.new_packet(OP_DELETE)
brename['path'] = path
if path not in self.files:
print("In other location")
packet = packets.new_packet(OP_FIND) # ask bootstrap - find location of file
packet['path'] = path
print('Sending OP_FIND for DELETE', packet)
sock = socks.tcp_sock()
sock.connect(self.bootstrap)
sock.send(packets.build(packet))
reply = packets.unpack(sock.recv(MAX_READ))
print('Received OP_FIND_R for DELETE', reply)
if 'loc' not in reply:
raise FuseOSError(ENOENT)
loc = tuple(reply['loc'])
tcp_sock = socks.tcp_sock()
tcp_sock.connect(loc) # connect to other node
packet = packets.new_packet(OP_DELETE)
packet['path'] = path
print('Sending OP_DELETE', packet)
tcp_sock.send(packets.build(packet)) # send syscall
reply = packets.unpack(tcp_sock.recv(MAX_READ)) # TODO: listen for reply in select
print('Received OP_DELETE_R', reply)
else:
print("In self")
del self.data[path]
self.files.pop(path)
boot_sock = socks.tcp_sock()
boot_sock.connect(self.bootstrap)
boot_sock.send(packets.build(brename))
def getxattr(self, path, name, position=0):
if path not in self.files:
print("GETXATTR in other location")
packet = packets.new_packet(OP_FIND) # ask bootstrap - find location of file
packet['path'] = path
print('Sending OP_FIND for GETXATTR', packet)
sock = socks.tcp_sock()
sock.connect(self.bootstrap)
sock.send(packets.build(packet))
reply = packets.unpack(sock.recv(MAX_READ))
print('Received OP_FIND_R for GETXATTR', reply)
if 'loc' not in reply:
raise FuseOSError(ENOENT)
loc = tuple(reply['loc'])
tcp_sock = socks.tcp_sock()
tcp_sock.connect(loc) # connect to other node
packet = packets.new_packet(OP_GETXATTR)
packet['path'] = path
packet['name'] = name
print('Sending OP_GETXATTR', packet)
tcp_sock.send(packets.build(packet)) # send syscall
reply = packets.unpack(tcp_sock.recv(MAX_READ)) # TODO: listen for reply in select
print('Received OP_GETXATTR_R', reply)
if reply['getxattr']:
return reply['getxattr']
else:
attrs = self.files[path].get('attrs', {})
try:
return attrs[name]
except KeyError:
return '' # Should return ENOATTR
def rename(self, old, new):
print("In Rename")
brename = packets.new_packet(OP_RENAME)
brename['old'] = old
brename['new'] = new
if old not in self.files:
packet = packets.new_packet(OP_FIND) # ask bootstrap - find location of file
packet['path'] = old
print('Sending OP_FIND for RENAME', packet)
sock = socks.tcp_sock()
sock.connect(self.bootstrap)
sock.send(packets.build(packet))
reply = packets.unpack(sock.recv(MAX_READ))
print('Received OP_FIND_R for RENAME', reply)
if 'loc' not in reply:
raise FuseOSError(ENOENT)
loc = tuple(reply['loc'])
tcp_sock = socks.tcp_sock()
tcp_sock.connect(loc) # connect to other node
packet = packets.new_packet(OP_RENAME)
packet['old'] = old
packet['new'] = new
print('Sending OP_RENAME', packet)
tcp_sock.send(packets.build(packet)) # send syscall
reply = packets.unpack(tcp_sock.recv(MAX_READ)) # TODO: listen for reply in select
print('Received OP_RENAME_R', reply)
else:
self.data[new] = self.data[old]
del self.data[old]
self.files[new] = self.files.pop(old)
boot_sock = socks.tcp_sock()
boot_sock.connect(self.bootstrap)
boot_sock.send(packets.build(brename))
def rename(self, old, new):
print("In Rename")
brename = packets.new_packet(OP_RENAME)
brename['old'] = old
brename['new'] = new
if old not in self.files:
packet = packets.new_packet(
OP_FIND) # ask bootstrap - find location of file
packet['path'] = old
print('Sending OP_FIND for RENAME', packet)
sock = socks.tcp_sock()
sock.connect(self.bootstrap)
sock.send(packets.build(packet))
reply = packets.unpack(sock.recv(MAX_READ))
print('Received OP_FIND_R for RENAME', reply)
if 'loc' not in reply:
raise FuseOSError(ENOENT)
loc = tuple(reply['loc'])
tcp_sock = socks.tcp_sock()
tcp_sock.connect(loc) # connect to other node
packet = packets.new_packet(OP_RENAME)
packet['old'] = old
packet['new'] = new
print('Sending OP_RENAME', packet)
tcp_sock.send(packets.build(packet)) # send syscall
reply = packets.unpack(
tcp_sock.recv(MAX_READ)) # TODO: listen for reply in select
print('Received OP_RENAME_R', reply)
else:
self.data[new] = self.data[old]
del self.data[old]
self.files[new] = self.files.pop(old)
boot_sock = socks.tcp_sock()
boot_sock.connect(self.bootstrap)
boot_sock.send(packets.build(brename))
def getxattr(self, path, name, position=0):
if path not in self.files:
print("GETXATTR in other location")
packet = packets.new_packet(
OP_FIND) # ask bootstrap - find location of file
packet['path'] = path
print('Sending OP_FIND for GETXATTR', packet)
sock = socks.tcp_sock()
sock.connect(self.bootstrap)
sock.send(packets.build(packet))
reply = packets.unpack(sock.recv(MAX_READ))
print('Received OP_FIND_R for GETXATTR', reply)
if 'loc' not in reply:
raise FuseOSError(ENOENT)
loc = tuple(reply['loc'])
tcp_sock = socks.tcp_sock()
tcp_sock.connect(loc) # connect to other node
packet = packets.new_packet(OP_GETXATTR)
packet['path'] = path
packet['name'] = name
print('Sending OP_GETXATTR', packet)
tcp_sock.send(packets.build(packet)) # send syscall
reply = packets.unpack(
tcp_sock.recv(MAX_READ)) # TODO: listen for reply in select
print('Received OP_GETXATTR_R', reply)
if reply['getxattr']:
return reply['getxattr']
else:
attrs = self.files[path].get('attrs', {})
try:
return attrs[name]
except KeyError:
return '' # Should return ENOATTR
def write(self, path, data, offset, fh):
#THIS IS WHERE WRITE HAPPENS
print("WRITE in Memory")
if path not in self.files:
print('remote write')
packet = packets.new_packet(OP_FIND) # ask bootstrap - find location of file
packet['path'] = path
print('Sending OP_FIND for WRITE', packet)
sock = socks.tcp_sock()
sock.connect(self.bootstrap)
sock.send(packets.build(packet))
reply = packets.unpack(sock.recv(MAX_READ))
print('Received OP_FIND_R for WRITE', reply)
if 'loc' not in reply:
raise FuseOSError(ENOENT)
loc = tuple(reply['loc'])
tcp_sock = socks.tcp_sock()
tcp_sock.connect(loc) # connect to other node
packet = packets.new_packet(OP_WRITE)
packet['path'] = path
packet['data'] = data.decode()
packet['offset'] = offset
packet['fh'] = fh
print('Sending OP_WRITE', packet)
tcp_sock.send(packets.build(packet)) # send syscall
reply = packets.unpack(tcp_sock.recv(MAX_READ)) # TODO: listen for reply in select
print('Received OP_WRITE_R', reply)
if 'datalen' in reply:
return reply['datalen']
else: raise FuseOSError(ENOENT)
print("local write")
print("current contents:", self.data[path])
print("offset", offset)
print("fh", fh)
self.data[path] = self.data[path][:offset].ljust(offset, b'\x00'.decode())
self.data[path] += data.decode()
self.data[path] += self.data[path][offset + len(data):]
# self.data[path] = (
# # make sure the data gets inserted at the right offset
# self.data[path][:offset].ljust(offset, '\x00'.encode('ascii'))
# + data.decode()
# # and only overwrites the bytes that data is replacing
# + self.data[path][offset + len(data):])
self.files[path]['st_size'] = len(self.data[path])
print("current contents:", self.data[path])
return len(data)
def readdir(self, path, fh):
#This is where LS happens
#return ['.', '..'] + [x[1:] for x in self.files if x != '/']
packet = packets.new_packet(OP_LS)
sock = socks.tcp_sock()
sock.connect(self.bootstrap)
sock.send(packets.build(packet))
ls = packets.unpack(sock.recv(MAX_READ))
print('ls contents', ls['ls'])
return ['.', '..'] + [x[1:] for x in ls['ls']]
def readdir(self, path, fh):
#This is where LS happens
#return ['.', '..'] + [x[1:] for x in self.files if x != '/']
packet = packets.new_packet(OP_LS)
sock = socks.tcp_sock()
sock.connect(self.bootstrap)
sock.send(packets.build(packet))
ls = packets.unpack(sock.recv(MAX_READ))
print('ls contents', ls['ls'])
return ['.', '..'] + [x[1:] for x in ls['ls']]
def _processBuffer(self):
if self.current_packet is None and len(self.buffer) >= 3:
self.current_packet = packets.Packet()
self.current_packet.unpack(self.buffer)
if self.current_packet is not None and len(self.buffer) >= self.current_packet.size:
packet = packets.unpack(self.buffer)
self.buffer = self.buffer[packet.size:]
self.factory.input.put_nowait(packet)
self.current_packet = None
self._processBuffer()
def read(self, path, size, offset, fh):
print("memory.py read called")
if path not in self.files:
packet = packets.new_packet(
OP_FIND) # ask bootstrap - find location of file
packet['path'] = path
print('Sending OP_FIND for READ', packet)
sock = socks.tcp_sock()
sock.connect(self.bootstrap)
sock.send(packets.build(packet))
reply = packets.unpack(sock.recv(MAX_READ))
print('Received OP_FIND_R for READ', reply)
if 'loc' not in reply:
raise FuseOSError(ENOENT)
loc = tuple(reply['loc'])
tcp_sock = socks.tcp_sock()
tcp_sock.connect(loc) # connect to other node
packet = packets.new_packet(OP_READ)
packet['path'] = path
packet['size'] = size
packet['offset'] = offset
packet['fh'] = fh
print('Sending OP_READ', packet)
tcp_sock.send(packets.build(packet)) # send syscall
reply = packets.unpack(
tcp_sock.recv(MAX_READ)) # TODO: listen for reply in select
print('Received OP_READ_R', reply)
if 'read' in reply:
return reply['read'].encode('utf-8')
else:
raise FuseOSError(ENOENT)
print("offset: ", offset)
print("size: ", size)
print("read contents:", self.data[path])
datalen = len(self.data[path])
print("datalen", datalen)
end = datalen
if datalen > size:
end = size
return self.data[path][offset:offset + end].encode('utf-8')
def read(self, path, size, offset, fh):
print("memory.py read called")
if path not in self.files:
packet = packets.new_packet(OP_FIND) # ask bootstrap - find location of file
packet['path'] = path
print('Sending OP_FIND for READ', packet)
sock = socks.tcp_sock()
sock.connect(self.bootstrap)
sock.send(packets.build(packet))
reply = packets.unpack(sock.recv(MAX_READ))
print('Received OP_FIND_R for READ', reply)
if 'loc' not in reply:
raise FuseOSError(ENOENT)
loc = tuple(reply['loc'])
tcp_sock = socks.tcp_sock()
tcp_sock.connect(loc) # connect to other node
packet = packets.new_packet(OP_READ)
packet['path'] = path
packet['size'] = size
packet['offset'] = offset
packet['fh'] = fh
print('Sending OP_READ', packet)
tcp_sock.send(packets.build(packet)) # send syscall
reply = packets.unpack(tcp_sock.recv(MAX_READ)) # TODO: listen for reply in select
print('Received OP_READ_R', reply)
if 'read' in reply:
return reply['read'].encode('utf-8')
else: raise FuseOSError(ENOENT)
print("offset: ", offset)
print("size: ", size)
print("read contents:",self.data[path])
datalen = len(self.data[path])
print("datalen", datalen)
end = datalen
if datalen > size:
end = size
return self.data[path][offset:offset + end].encode('utf-8')
def recv(conn):
print('Receiving from', conn)
packet = packets.unpack(conn.recv(MAX_READ))
print('Received', packet)
if not packet:
print('Empty packet, closing connection to', conn)
close(conn)
return
if 'opcode' not in packet:
print('Invalid packet: opcode missing')
if packet['opcode'] == OP_JOIN:
print("FLOOPLEDYDOOOO",packet)
nodes.append(packet['loc'])
elif packet['opcode'] == OP_LS:
print('Received OP_LS')
reply = packets.new_packet(OP_LS_R)
reply['ls'] = list(files.keys())
conn.send(packets.build(reply))
elif packet['opcode'] == OP_CREATE:
print('Creating file')
files[packet['path']] = packet['loc'] # map new file to node
elif packet['opcode'] == OP_FIND:
print('Received OP_FIND', packet)
reply = packets.new_packet(OP_FIND_R)
if packet['path'] in files:
reply['loc'] = files[packet['path']]
# TODO: error file not found
print('Sending OP_FIND_R', reply)
conn.send(packets.build(reply))
elif packet['opcode'] == OP_RENAME:
print('Received OP_RENAME', packet)
print('files',files)
files[packet['new']] = files[packet['old']]
del files[packet['old']]
print('Renamed file')
elif packet['opcode'] == OP_DELETE:
print('Received OP_DELETE', packet)
print('files', files)
del files[packet['path']]
print('Deleted file')
elif packet['opcode'] == OP_BYE:
print('Received OP_LEAVE', packet)
print('nodes are: ', nodes)
if packet['loc'] in nodes:
nodes.remove(packet['loc'])
temp = {x:y for x,y in files.items()}
for f in temp:
print(packet['loc'])
print(temp[f])
if temp[f] == packet['loc']:
del files[f]
reply = packets.new_packet(OP_BYE_R)
print('Sending OP_LEAVE_R', reply)
print('Sending to: ',conn)
conn.send(packets.build(reply))
else:
print('Invalid opcode')
def recv(sock):
print("receiving from socket")
packet = packets.unpack(sock.recv(MAX_READ))
print("packet is: ", packet)
if not packet:
print('Read empty packet, closing connection', sock)
close(sock)
return
if packet['opcode'] == OP_GETATTR:
print('Received OP_GETATTR in node.py')
reply = packets.new_packet(OP_GETATTR_R)
reply['getattr'] = filesystem.getattr(packet['path']) # call getattr locally
print('Sending OP_GETATTR_R', reply)
sock.send(packets.build(reply))
elif packet['opcode'] == OP_BYE_R:
close(sock)
os.kill(os.getpid(),signal.SIGKILL)
sys.exit(0)
elif packet['opcode'] == OP_READ:
print("Received OP_READ in node.py")
reply = packets.new_packet(OP_READ_R)
reply['read'] = filesystem.read(packet['path'],packet['size'],packet['offset'],packet['fh']).decode()
print('Sending OP_READ_R with ', reply['read'])
sock.send(packets.build(reply))
elif packet['opcode'] == OP_WRITE:
print("Received OP_WRITE in node.py")
reply = packets.new_packet(OP_WRITE_R)
reply['datalen'] = filesystem.write(packet['path'],packet['data'].encode(),packet['offset'],packet['fh'])
print('Sending OP_WRITE_R with ', reply['datalen'])
sock.send(packets.build(reply))
elif packet['opcode'] == OP_TRUNC:
print("Received OP_TRUNC in node.py")
reply = packets.new_packet(OP_TRUNC_R)
reply['trunc'] = filesystem.truncate(packet['path'],packet['length'])
print('Sending OP_TRUNC_R with', reply['trunc'])
sock.send(packets.build(reply))
elif packet['opcode'] == OP_GETXATTR:
print("Received OP_GETXATTR in nodde.py")
reply = packets.new_packet(OP_GETXATTR_R)
reply['getxattr'] = filesystem.getxattr(packet['path'],packet['name'])
print('Sending OP_GETXATTR_R with', reply['getxattr'])
sock.send(packets.build(reply))
elif packet['opcode'] == OP_LEAVE:
print("Bootstrap has exited, so we will exit too.")
os.kill(os.getpid(),signal.SIGKILL)
sys.exit(0)
elif packet['opcode'] == OP_RENAME:
print("Received OP_RENAME in node.py")
reply = packets.new_packet(OP_RENAME_R)
reply['rename'] = filesystem.rename(packet['old'],packet['new'])
print("Sending OP_RENAME_R in node.py")
sock.send(packets.build(reply))
elif packet['opcode'] == OP_DELETE:
print("Received OP_DELETE in node.py")
reply = packets.new_packet(OP_DELETE_R)
reply['delete'] = filesystem.unlink(packet['path'])
print("Sending OP_DELETE_R in node.py")
sock.send(packets.build(reply))
else:
print('Invalid opcode')